305 files changed, 133445 insertions, 0 deletions

diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..c032e47
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,5 @@
+Ľuboš Slovák <lubos.slovak@nic.cz>
+Marek Vavruša <marek.vavrusa@nic.cz>
+Jan Kadlec <jan.kadlec@nic.cz>
+Ondřej Surý <ondrej.sury@nic.cz>
+Ondřej Filip <ondrej.filip@nic.cz>
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
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+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/ChangeLog
diff --git a/CodingStyle b/CodingStyle
new file mode 100644
index 0000000..986417c
--- /dev/null
+++ b/CodingStyle
@@ -0,0 +1,77 @@
+Coding style
+============
+* Indentation: TAB (8 spaces width)
+* Braces: K&R, 1TBS
+* Max line width: 80 chars
+* Pointer asterisk attached to the name of the variable
+* Own structures/types: _t suffix (f.e. nameserver_t)
+* Header guard format: _KNOTD__HEADER_H_
+* Spaces around binary operators
+* Space between keyword and bracket (f.e. "if (predicate)")
+* No space between variable and typecast (f.e. "return (int)val;")
+
+To sum it up, Linux KNF is used, see [1].
+
+[1] Linux Coding Style:
+    http://kerneltrap.org/files/Jeremy/CodingStyle.txt
+
+AStyle command format
+=====================
+astyle --style=1tbs -t8 -w -p -H -U -j --align-pointer=name
+
+Doxygen
+=======
+* Format: Qt-style
+  * "\brief", not "@brief"
+  * "/*!", not "/**"
+* Order of sections
+  * brief description
+  * long description
+  * notes
+  * warnings
+  * parameters
+  * return values
+  * todos
+* Always use \brief (no autobrief)
+* Indent text (using spaces only) in multiple-line sections
+* In multi-line comments, opening line (/*!) should be empty
+* One empty line between two consecutive sections
+* Struct and union members documented on the same line if the comment fits
+* Use \retval (or more of them) instead of \return
+  if the function returns some distinct values
+  (such as 0 for no error, -1 for something else, etc.)
+
+Example
+=======
+/*! 
+ * \brief Some structure.
+ * 
+ * Longer description.
+ */
+ struct some_struct {
+    /*!
+     * \brief This comment does not fit on the same line as the member
+     *        as it is rather large. 
+     */
+    int fd;
+    int flags; /*!< Flags. */
+ };
+
+/*!
+ * \brief Brief description of some function.
+ *
+ * Longer description.
+ * 
+ * \note This function is deprecated.
+ *
+ * \warning Do not use this function!
+ *
+ * \param param1 Some parameter.
+ * \param param2 Other parameter. This one has rather large comment,
+ *               so its next line is indented for better readability.
+ * 
+ * \retval 0 on success.
+ * \retval -1 if some error occured.
+ *
+ * \todo Remove (deprecated).
+ */
diff --git a/Doxy.page.h b/Doxy.page.h
new file mode 100644
index 0000000..4d0704c
--- /dev/null
+++ b/Doxy.page.h
@@ -0,0 +1,88 @@
+/*!
+
+\defgroup server            Server control module.
+\defgroup threading         Threading API.
+\defgroup network           Socket API.
+\defgroup query_processing  DNS query processing.
+\defgroup utils             Utilities, constants and macros.
+\defgroup debugging         Server debugging API.
+\defgroup logging           Server logging API.
+\defgroup statistics        Statistics module (optional).
+\defgroup dnslib            dnslib - Generic DNS library.
+\defgroup hashing           Hash table and functions.
+\defgroup common_lib        Common library.
+\defgroup alloc             Memory allocation.
+\defgroup tests             Unit tests.
+\defgroup zoneparser        Zone compiler utility
+\defgroup ctl               Control utility
+
+\mainpage Knot API documentation.
+
+Knot is an open-source, high-performace, purely authoritative DNS server.
+
+<h2>Requirements</h2>
+- liburcu (at least 0.4.5): http://lttng.org/urcu
+- automake
+- autoconf
+- libtool
+
+<h2>Installation</h2>
+Knot uses autotools to generate makefiles.
+
+\todo Add some more info about usage and requirements.
+
+\code
+$ autoreconf -i
+$ ./configure
+$ make
+\endcode
+
+<h2>Starting the server</h2>
+
+When compiled, the following executables are created (in the src/ directory):
+- \em knotd              - The server
+- \em knotc              - Control utility
+- \em knot-zcompile      - Zone compiler
+- \em unittests          - Unit tests for the server and dnslib
+- \em unittests-zcompile - Unit tests for the zone compiler
+
+1. Add path to knotd and knot-zcompile executables to PATH
+
+2. Prepare a configuration file. You may copy and edit the one provided with
+   the server (\em samples/knot.conf.sample).
+
+2. Compile zone
+\code
+$ src/knotc -c path-to-config-file compile
+\endcode
+
+3. Run the server
+\code
+$ src/knotc -c path-to-config-file start
+\endcode
+
+<h2>Server modules</h2>
+- \ref server
+- \ref threading
+- \ref network
+- \ref query_processing
+- \ref utils
+- \ref debugging
+- \ref logging
+- \ref statistics
+
+<h2>DNS library</h2>
+
+- \ref dnslib
+- \ref hashing
+
+<h2>Common library</h2>
+
+- \ref common_lib
+- \ref alloc
+
+<h2>Other modules</h2>
+- \ref tests
+- \ref zoneparser
+- \ref ctl
+ */
diff --git a/Doxyfile b/Doxyfile
new file mode 100644
index 0000000..4966e80
--- /dev/null
+++ b/Doxyfile
@@ -0,0 +1,1634 @@
+# Doxyfile 1.7.1
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project
+#
+# All text after a hash (#) is considered a comment and will be ignored
+# The format is:
+#       TAG = value [value, ...]
+# For lists items can also be appended using:
+#       TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (" ")
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# This tag specifies the encoding used for all characters in the config file 
+# that follow. The default is UTF-8 which is also the encoding used for all 
+# text before the first occurrence of this tag. Doxygen uses libiconv (or the 
+# iconv built into libc) for the transcoding. See 
+# http://www.gnu.org/software/libiconv for the list of possible encodings.
+
+DOXYFILE_ENCODING      = UTF-8
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded 
+# by quotes) that should identify the project.
+
+PROJECT_NAME           = Knot
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. 
+# This could be handy for archiving the generated documentation or 
+# if some version control system is used.
+
+PROJECT_NUMBER         = 0.1.0
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
+# base path where the generated documentation will be put. 
+# If a relative path is entered, it will be relative to the location 
+# where doxygen was started. If left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       = doc
+
+# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create 
+# 4096 sub-directories (in 2 levels) under the output directory of each output 
+# format and will distribute the generated files over these directories. 
+# Enabling this option can be useful when feeding doxygen a huge amount of 
+# source files, where putting all generated files in the same directory would 
+# otherwise cause performance problems for the file system.
+
+CREATE_SUBDIRS         = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all 
+# documentation generated by doxygen is written. Doxygen will use this 
+# information to generate all constant output in the proper language. 
+# The default language is English, other supported languages are: 
+# Afrikaans, Arabic, Brazilian, Catalan, Chinese, Chinese-Traditional, 
+# Croatian, Czech, Danish, Dutch, Esperanto, Farsi, Finnish, French, German, 
+# Greek, Hungarian, Italian, Japanese, Japanese-en (Japanese with English 
+# messages), Korean, Korean-en, Lithuanian, Norwegian, Macedonian, Persian, 
+# Polish, Portuguese, Romanian, Russian, Serbian, Serbian-Cyrilic, Slovak, 
+# Slovene, Spanish, Swedish, Ukrainian, and Vietnamese.
+
+OUTPUT_LANGUAGE        = English
+
+# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will 
+# include brief member descriptions after the members that are listed in 
+# the file and class documentation (similar to JavaDoc). 
+# Set to NO to disable this.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend 
+# the brief description of a member or function before the detailed description. 
+# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the 
+# brief descriptions will be completely suppressed.
+
+REPEAT_BRIEF           = YES
+
+# This tag implements a quasi-intelligent brief description abbreviator 
+# that is used to form the text in various listings. Each string 
+# in this list, if found as the leading text of the brief description, will be 
+# stripped from the text and the result after processing the whole list, is 
+# used as the annotated text. Otherwise, the brief description is used as-is. 
+# If left blank, the following values are used ("$name" is automatically 
+# replaced with the name of the entity): "The $name class" "The $name widget" 
+# "The $name file" "is" "provides" "specifies" "contains" 
+# "represents" "a" "an" "the"
+
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then 
+# Doxygen will generate a detailed section even if there is only a brief 
+# description.
+
+ALWAYS_DETAILED_SEC    = YES
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all 
+# inherited members of a class in the documentation of that class as if those 
+# members were ordinary class members. Constructors, destructors and assignment 
+# operators of the base classes will not be shown.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full 
+# path before files name in the file list and in the header files. If set 
+# to NO the shortest path that makes the file name unique will be used.
+
+FULL_PATH_NAMES        = YES
+
+# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag 
+# can be used to strip a user-defined part of the path. Stripping is 
+# only done if one of the specified strings matches the left-hand part of 
+# the path. The tag can be used to show relative paths in the file list. 
+# If left blank the directory from which doxygen is run is used as the 
+# path to strip.
+
+STRIP_FROM_PATH        =  \
+                         src/
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of 
+# the path mentioned in the documentation of a class, which tells 
+# the reader which header file to include in order to use a class. 
+# If left blank only the name of the header file containing the class 
+# definition is used. Otherwise one should specify the include paths that 
+# are normally passed to the compiler using the -I flag.
+
+STRIP_FROM_INC_PATH    = 
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter 
+# (but less readable) file names. This can be useful is your file systems 
+# doesn't support long names like on DOS, Mac, or CD-ROM.
+
+SHORT_NAMES            = NO
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen 
+# will interpret the first line (until the first dot) of a JavaDoc-style 
+# comment as the brief description. If set to NO, the JavaDoc 
+# comments will behave just like regular Qt-style comments 
+# (thus requiring an explicit @brief command for a brief description.)
+
+JAVADOC_AUTOBRIEF      = NO
+
+# If the QT_AUTOBRIEF tag is set to YES then Doxygen will 
+# interpret the first line (until the first dot) of a Qt-style 
+# comment as the brief description. If set to NO, the comments 
+# will behave just like regular Qt-style comments (thus requiring 
+# an explicit \brief command for a brief description.)
+
+QT_AUTOBRIEF           = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen 
+# treat a multi-line C++ special comment block (i.e. a block of //! or /// 
+# comments) as a brief description. This used to be the default behaviour. 
+# The new default is to treat a multi-line C++ comment block as a detailed 
+# description. Set this tag to YES if you prefer the old behaviour instead.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented 
+# member inherits the documentation from any documented member that it 
+# re-implements.
+
+INHERIT_DOCS           = YES
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce 
+# a new page for each member. If set to NO, the documentation of a member will 
+# be part of the file/class/namespace that contains it.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. 
+# Doxygen uses this value to replace tabs by spaces in code fragments.
+
+TAB_SIZE               = 8
+
+# This tag can be used to specify a number of aliases that acts 
+# as commands in the documentation. An alias has the form "name=value". 
+# For example adding "sideeffect=\par Side Effects:\n" will allow you to 
+# put the command \sideeffect (or @sideeffect) in the documentation, which 
+# will result in a user-defined paragraph with heading "Side Effects:". 
+# You can put \n's in the value part of an alias to insert newlines.
+
+ALIASES                = 
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C 
+# sources only. Doxygen will then generate output that is more tailored for C. 
+# For instance, some of the names that are used will be different. The list 
+# of all members will be omitted, etc.
+
+OPTIMIZE_OUTPUT_FOR_C  = YES
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java 
+# sources only. Doxygen will then generate output that is more tailored for 
+# Java. For instance, namespaces will be presented as packages, qualified 
+# scopes will look different, etc.
+
+OPTIMIZE_OUTPUT_JAVA   = NO
+
+# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran 
+# sources only. Doxygen will then generate output that is more tailored for 
+# Fortran.
+
+OPTIMIZE_FOR_FORTRAN   = NO
+
+# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL 
+# sources. Doxygen will then generate output that is tailored for 
+# VHDL.
+
+OPTIMIZE_OUTPUT_VHDL   = NO
+
+# Doxygen selects the parser to use depending on the extension of the files it 
+# parses. With this tag you can assign which parser to use for a given extension. 
+# Doxygen has a built-in mapping, but you can override or extend it using this 
+# tag. The format is ext=language, where ext is a file extension, and language 
+# is one of the parsers supported by doxygen: IDL, Java, Javascript, CSharp, C, 
+# C++, D, PHP, Objective-C, Python, Fortran, VHDL, C, C++. For instance to make 
+# doxygen treat .inc files as Fortran files (default is PHP), and .f files as C 
+# (default is Fortran), use: inc=Fortran f=C. Note that for custom extensions 
+# you also need to set FILE_PATTERNS otherwise the files are not read by doxygen.
+
+EXTENSION_MAPPING      = 
+
+# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want 
+# to include (a tag file for) the STL sources as input, then you should 
+# set this tag to YES in order to let doxygen match functions declarations and 
+# definitions whose arguments contain STL classes (e.g. func(std::string); v.s. 
+# func(std::string) {}). This also make the inheritance and collaboration 
+# diagrams that involve STL classes more complete and accurate.
+
+BUILTIN_STL_SUPPORT    = NO
+
+# If you use Microsoft's C++/CLI language, you should set this option to YES to 
+# enable parsing support.
+
+CPP_CLI_SUPPORT        = NO
+
+# Set the SIP_SUPPORT tag to YES if your project consists of sip sources only. 
+# Doxygen will parse them like normal C++ but will assume all classes use public 
+# instead of private inheritance when no explicit protection keyword is present.
+
+SIP_SUPPORT            = NO
+
+# For Microsoft's IDL there are propget and propput attributes to indicate getter 
+# and setter methods for a property. Setting this option to YES (the default) 
+# will make doxygen to replace the get and set methods by a property in the 
+# documentation. This will only work if the methods are indeed getting or 
+# setting a simple type. If this is not the case, or you want to show the 
+# methods anyway, you should set this option to NO.
+
+IDL_PROPERTY_SUPPORT   = YES
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC 
+# tag is set to YES, then doxygen will reuse the documentation of the first 
+# member in the group (if any) for the other members of the group. By default 
+# all members of a group must be documented explicitly.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# Set the SUBGROUPING tag to YES (the default) to allow class member groups of 
+# the same type (for instance a group of public functions) to be put as a 
+# subgroup of that type (e.g. under the Public Functions section). Set it to 
+# NO to prevent subgrouping. Alternatively, this can be done per class using 
+# the \nosubgrouping command.
+
+SUBGROUPING            = YES
+
+# When TYPEDEF_HIDES_STRUCT is enabled, a typedef of a struct, union, or enum 
+# is documented as struct, union, or enum with the name of the typedef. So 
+# typedef struct TypeS {} TypeT, will appear in the documentation as a struct 
+# with name TypeT. When disabled the typedef will appear as a member of a file, 
+# namespace, or class. And the struct will be named TypeS. This can typically 
+# be useful for C code in case the coding convention dictates that all compound 
+# types are typedef'ed and only the typedef is referenced, never the tag name.
+
+TYPEDEF_HIDES_STRUCT   = YES
+
+# The SYMBOL_CACHE_SIZE determines the size of the internal cache use to 
+# determine which symbols to keep in memory and which to flush to disk. 
+# When the cache is full, less often used symbols will be written to disk. 
+# For small to medium size projects (<1000 input files) the default value is 
+# probably good enough. For larger projects a too small cache size can cause 
+# doxygen to be busy swapping symbols to and from disk most of the time 
+# causing a significant performance penality. 
+# If the system has enough physical memory increasing the cache will improve the 
+# performance by keeping more symbols in memory. Note that the value works on 
+# a logarithmic scale so increasing the size by one will rougly double the 
+# memory usage. The cache size is given by this formula: 
+# 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0, 
+# corresponding to a cache size of 2^16 = 65536 symbols
+
+SYMBOL_CACHE_SIZE      = 0
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in 
+# documentation are documented, even if no documentation was available. 
+# Private class members and static file members will be hidden unless 
+# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
+
+EXTRACT_ALL            = YES
+
+# If the EXTRACT_PRIVATE tag is set to YES all private members of a class 
+# will be included in the documentation.
+
+EXTRACT_PRIVATE        = NO
+
+# If the EXTRACT_STATIC tag is set to YES all static members of a file 
+# will be included in the documentation.
+
+EXTRACT_STATIC         = NO
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) 
+# defined locally in source files will be included in the documentation. 
+# If set to NO only classes defined in header files are included.
+
+EXTRACT_LOCAL_CLASSES  = YES
+
+# This flag is only useful for Objective-C code. When set to YES local 
+# methods, which are defined in the implementation section but not in 
+# the interface are included in the documentation. 
+# If set to NO (the default) only methods in the interface are included.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If this flag is set to YES, the members of anonymous namespaces will be 
+# extracted and appear in the documentation as a namespace called 
+# 'anonymous_namespace{file}', where file will be replaced with the base 
+# name of the file that contains the anonymous namespace. By default 
+# anonymous namespace are hidden.
+
+EXTRACT_ANON_NSPACES   = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all 
+# undocumented members of documented classes, files or namespaces. 
+# If set to NO (the default) these members will be included in the 
+# various overviews, but no documentation section is generated. 
+# This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_MEMBERS     = NO
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all 
+# undocumented classes that are normally visible in the class hierarchy. 
+# If set to NO (the default) these classes will be included in the various 
+# overviews. This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_CLASSES     = NO
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all 
+# friend (class|struct|union) declarations. 
+# If set to NO (the default) these declarations will be included in the 
+# documentation.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any 
+# documentation blocks found inside the body of a function. 
+# If set to NO (the default) these blocks will be appended to the 
+# function's detailed documentation block.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation 
+# that is typed after a \internal command is included. If the tag is set 
+# to NO (the default) then the documentation will be excluded. 
+# Set it to YES to include the internal documentation.
+
+INTERNAL_DOCS          = NO
+
+# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate 
+# file names in lower-case letters. If set to YES upper-case letters are also 
+# allowed. This is useful if you have classes or files whose names only differ 
+# in case and if your file system supports case sensitive file names. Windows 
+# and Mac users are advised to set this option to NO.
+
+CASE_SENSE_NAMES       = NO
+
+# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen 
+# will show members with their full class and namespace scopes in the 
+# documentation. If set to YES the scope will be hidden.
+
+HIDE_SCOPE_NAMES       = YES
+
+# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen 
+# will put a list of the files that are included by a file in the documentation 
+# of that file.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the FORCE_LOCAL_INCLUDES tag is set to YES then Doxygen 
+# will list include files with double quotes in the documentation 
+# rather than with sharp brackets.
+
+FORCE_LOCAL_INCLUDES   = NO
+
+# If the INLINE_INFO tag is set to YES (the default) then a tag [inline] 
+# is inserted in the documentation for inline members.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen 
+# will sort the (detailed) documentation of file and class members 
+# alphabetically by member name. If set to NO the members will appear in 
+# declaration order.
+
+SORT_MEMBER_DOCS       = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the 
+# brief documentation of file, namespace and class members alphabetically 
+# by member name. If set to NO (the default) the members will appear in 
+# declaration order.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen 
+# will sort the (brief and detailed) documentation of class members so that 
+# constructors and destructors are listed first. If set to NO (the default) 
+# the constructors will appear in the respective orders defined by 
+# SORT_MEMBER_DOCS and SORT_BRIEF_DOCS. 
+# This tag will be ignored for brief docs if SORT_BRIEF_DOCS is set to NO 
+# and ignored for detailed docs if SORT_MEMBER_DOCS is set to NO.
+
+SORT_MEMBERS_CTORS_1ST = NO
+
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the 
+# hierarchy of group names into alphabetical order. If set to NO (the default) 
+# the group names will appear in their defined order.
+
+SORT_GROUP_NAMES       = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be 
+# sorted by fully-qualified names, including namespaces. If set to 
+# NO (the default), the class list will be sorted only by class name, 
+# not including the namespace part. 
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES. 
+# Note: This option applies only to the class list, not to the 
+# alphabetical list.
+
+SORT_BY_SCOPE_NAME     = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or 
+# disable (NO) the todo list. This list is created by putting \todo 
+# commands in the documentation.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or 
+# disable (NO) the test list. This list is created by putting \test 
+# commands in the documentation.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or 
+# disable (NO) the bug list. This list is created by putting \bug 
+# commands in the documentation.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or 
+# disable (NO) the deprecated list. This list is created by putting 
+# \deprecated commands in the documentation.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional 
+# documentation sections, marked by \if sectionname ... \endif.
+
+ENABLED_SECTIONS       = 
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines 
+# the initial value of a variable or define consists of for it to appear in 
+# the documentation. If the initializer consists of more lines than specified 
+# here it will be hidden. Use a value of 0 to hide initializers completely. 
+# The appearance of the initializer of individual variables and defines in the 
+# documentation can be controlled using \showinitializer or \hideinitializer 
+# command in the documentation regardless of this setting.
+
+MAX_INITIALIZER_LINES  = 50
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated 
+# at the bottom of the documentation of classes and structs. If set to YES the 
+# list will mention the files that were used to generate the documentation.
+
+SHOW_USED_FILES        = YES
+
+# If the sources in your project are distributed over multiple directories 
+# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy 
+# in the documentation. The default is NO.
+
+SHOW_DIRECTORIES       = YES
+
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page. 
+# This will remove the Files entry from the Quick Index and from the 
+# Folder Tree View (if specified). The default is YES.
+
+SHOW_FILES             = YES
+
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the 
+# Namespaces page.  This will remove the Namespaces entry from the Quick Index 
+# and from the Folder Tree View (if specified). The default is YES.
+
+SHOW_NAMESPACES        = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that 
+# doxygen should invoke to get the current version for each file (typically from 
+# the version control system). Doxygen will invoke the program by executing (via 
+# popen()) the command <command> <input-file>, where <command> is the value of 
+# the FILE_VERSION_FILTER tag, and <input-file> is the name of an input file 
+# provided by doxygen. Whatever the program writes to standard output 
+# is used as the file version. See the manual for examples.
+
+FILE_VERSION_FILTER    = 
+
+# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed 
+# by doxygen. The layout file controls the global structure of the generated 
+# output files in an output format independent way. The create the layout file 
+# that represents doxygen's defaults, run doxygen with the -l option. 
+# You can optionally specify a file name after the option, if omitted 
+# DoxygenLayout.xml will be used as the name of the layout file.
+
+LAYOUT_FILE            = 
+
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated 
+# by doxygen. Possible values are YES and NO. If left blank NO is used.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are 
+# generated by doxygen. Possible values are YES and NO. If left blank 
+# NO is used.
+
+WARNINGS               = YES
+
+# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings 
+# for undocumented members. If EXTRACT_ALL is set to YES then this flag will 
+# automatically be disabled.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for 
+# potential errors in the documentation, such as not documenting some 
+# parameters in a documented function, or documenting parameters that 
+# don't exist or using markup commands wrongly.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be abled to get warnings for 
+# functions that are documented, but have no documentation for their parameters 
+# or return value. If set to NO (the default) doxygen will only warn about 
+# wrong or incomplete parameter documentation, but not about the absence of 
+# documentation.
+
+WARN_NO_PARAMDOC       = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that 
+# doxygen can produce. The string should contain the $file, $line, and $text 
+# tags, which will be replaced by the file and line number from which the 
+# warning originated and the warning text. Optionally the format may contain 
+# $version, which will be replaced by the version of the file (if it could 
+# be obtained via FILE_VERSION_FILTER)
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning 
+# and error messages should be written. If left blank the output is written 
+# to stderr.
+
+WARN_LOGFILE           = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag can be used to specify the files and/or directories that contain 
+# documented source files. You may enter file names like "myfile.cpp" or 
+# directories like "/usr/src/myproject". Separate the files or directories 
+# with spaces.
+
+INPUT                  = src/ \
+                         Doxy.page.h
+
+# This tag can be used to specify the character encoding of the source files 
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is 
+# also the default input encoding. Doxygen uses libiconv (or the iconv built 
+# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for 
+# the list of possible encodings.
+
+INPUT_ENCODING         = UTF-8
+
+# If the value of the INPUT tag contains directories, you can use the 
+# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank the following patterns are tested: 
+# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx 
+# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.py *.f90
+
+FILE_PATTERNS          = *.c \
+                         *.h
+
+# The RECURSIVE tag can be used to turn specify whether or not subdirectories 
+# should be searched for input files as well. Possible values are YES and NO. 
+# If left blank NO is used.
+
+RECURSIVE              = YES
+
+# The EXCLUDE tag can be used to specify files and/or directories that should 
+# excluded from the INPUT source files. This way you can easily exclude a 
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+
+EXCLUDE                = 
+
+# The EXCLUDE_SYMLINKS tag can be used select whether or not files or 
+# directories that are symbolic links (a Unix filesystem feature) are excluded 
+# from the input.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the 
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude 
+# certain files from those directories. Note that the wildcards are matched 
+# against the file with absolute path, so to exclude all test directories 
+# for example use the pattern */test/*
+
+EXCLUDE_PATTERNS       = 
+
+# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names 
+# (namespaces, classes, functions, etc.) that should be excluded from the 
+# output. The symbol name can be a fully qualified name, a word, or if the 
+# wildcard * is used, a substring. Examples: ANamespace, AClass, 
+# AClass::ANamespace, ANamespace::*Test
+
+EXCLUDE_SYMBOLS        = 
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or 
+# directories that contain example code fragments that are included (see 
+# the \include command).
+
+EXAMPLE_PATH           = 
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the 
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank all files are included.
+
+EXAMPLE_PATTERNS       = *
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be 
+# searched for input files to be used with the \include or \dontinclude 
+# commands irrespective of the value of the RECURSIVE tag. 
+# Possible values are YES and NO. If left blank NO is used.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or 
+# directories that contain image that are included in the documentation (see 
+# the \image command).
+
+IMAGE_PATH             = 
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should 
+# invoke to filter for each input file. Doxygen will invoke the filter program 
+# by executing (via popen()) the command <filter> <input-file>, where <filter> 
+# is the value of the INPUT_FILTER tag, and <input-file> is the name of an 
+# input file. Doxygen will then use the output that the filter program writes 
+# to standard output.  If FILTER_PATTERNS is specified, this tag will be 
+# ignored.
+
+INPUT_FILTER           = 
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern 
+# basis.  Doxygen will compare the file name with each pattern and apply the 
+# filter if there is a match.  The filters are a list of the form: 
+# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further 
+# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER 
+# is applied to all files.
+
+FILTER_PATTERNS        = 
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using 
+# INPUT_FILTER) will be used to filter the input files when producing source 
+# files to browse (i.e. when SOURCE_BROWSER is set to YES).
+
+FILTER_SOURCE_FILES    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will 
+# be generated. Documented entities will be cross-referenced with these sources. 
+# Note: To get rid of all source code in the generated output, make sure also 
+# VERBATIM_HEADERS is set to NO.
+
+SOURCE_BROWSER         = YES
+
+# Setting the INLINE_SOURCES tag to YES will include the body 
+# of functions and classes directly in the documentation.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct 
+# doxygen to hide any special comment blocks from generated source code 
+# fragments. Normal C and C++ comments will always remain visible.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES 
+# then for each documented function all documented 
+# functions referencing it will be listed.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES 
+# then for each documented function all documented entities 
+# called/used by that function will be listed.
+
+REFERENCES_RELATION    = NO
+
+# If the REFERENCES_LINK_SOURCE tag is set to YES (the default) 
+# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from 
+# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will 
+# link to the source code.  Otherwise they will link to the documentation.
+
+REFERENCES_LINK_SOURCE = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code 
+# will point to the HTML generated by the htags(1) tool instead of doxygen 
+# built-in source browser. The htags tool is part of GNU's global source 
+# tagging system (see http://www.gnu.org/software/global/global.html). You 
+# will need version 4.8.6 or higher.
+
+USE_HTAGS              = NO
+
+# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen 
+# will generate a verbatim copy of the header file for each class for 
+# which an include is specified. Set to NO to disable this.
+
+VERBATIM_HEADERS       = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index 
+# of all compounds will be generated. Enable this if the project 
+# contains a lot of classes, structs, unions or interfaces.
+
+ALPHABETICAL_INDEX     = YES
+
+# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then 
+# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns 
+# in which this list will be split (can be a number in the range [1..20])
+
+COLS_IN_ALPHA_INDEX    = 5
+
+# In case all classes in a project start with a common prefix, all 
+# classes will be put under the same header in the alphabetical index. 
+# The IGNORE_PREFIX tag can be used to specify one or more prefixes that 
+# should be ignored while generating the index headers.
+
+IGNORE_PREFIX          = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES (the default) Doxygen will 
+# generate HTML output.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `html' will be used as the default path.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for 
+# each generated HTML page (for example: .htm,.php,.asp). If it is left blank 
+# doxygen will generate files with .html extension.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a personal HTML header for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard header.
+
+HTML_HEADER            = 
+
+# The HTML_FOOTER tag can be used to specify a personal HTML footer for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard footer.
+
+HTML_FOOTER            = 
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading 
+# style sheet that is used by each HTML page. It can be used to 
+# fine-tune the look of the HTML output. If the tag is left blank doxygen 
+# will generate a default style sheet. Note that doxygen will try to copy 
+# the style sheet file to the HTML output directory, so don't put your own 
+# stylesheet in the HTML output directory as well, or it will be erased!
+
+HTML_STYLESHEET        = 
+
+# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. 
+# Doxygen will adjust the colors in the stylesheet and background images 
+# according to this color. Hue is specified as an angle on a colorwheel, 
+# see http://en.wikipedia.org/wiki/Hue for more information. 
+# For instance the value 0 represents red, 60 is yellow, 120 is green, 
+# 180 is cyan, 240 is blue, 300 purple, and 360 is red again. 
+# The allowed range is 0 to 359.
+
+HTML_COLORSTYLE_HUE    = 220
+
+# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of 
+# the colors in the HTML output. For a value of 0 the output will use 
+# grayscales only. A value of 255 will produce the most vivid colors.
+
+HTML_COLORSTYLE_SAT    = 100
+
+# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to 
+# the luminance component of the colors in the HTML output. Values below 
+# 100 gradually make the output lighter, whereas values above 100 make 
+# the output darker. The value divided by 100 is the actual gamma applied, 
+# so 80 represents a gamma of 0.8, The value 220 represents a gamma of 2.2, 
+# and 100 does not change the gamma.
+
+HTML_COLORSTYLE_GAMMA  = 80
+
+# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML 
+# page will contain the date and time when the page was generated. Setting 
+# this to NO can help when comparing the output of multiple runs.
+
+HTML_TIMESTAMP         = YES
+
+# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, 
+# files or namespaces will be aligned in HTML using tables. If set to 
+# NO a bullet list will be used.
+
+HTML_ALIGN_MEMBERS     = YES
+
+# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML 
+# documentation will contain sections that can be hidden and shown after the 
+# page has loaded. For this to work a browser that supports 
+# JavaScript and DHTML is required (for instance Mozilla 1.0+, Firefox 
+# Netscape 6.0+, Internet explorer 5.0+, Konqueror, or Safari).
+
+HTML_DYNAMIC_SECTIONS  = NO
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files 
+# will be generated that can be used as input for Apple's Xcode 3 
+# integrated development environment, introduced with OSX 10.5 (Leopard). 
+# To create a documentation set, doxygen will generate a Makefile in the 
+# HTML output directory. Running make will produce the docset in that 
+# directory and running "make install" will install the docset in 
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find 
+# it at startup. 
+# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html 
+# for more information.
+
+GENERATE_DOCSET        = NO
+
+# When GENERATE_DOCSET tag is set to YES, this tag determines the name of the 
+# feed. A documentation feed provides an umbrella under which multiple 
+# documentation sets from a single provider (such as a company or product suite) 
+# can be grouped.
+
+DOCSET_FEEDNAME        = "Doxygen generated docs"
+
+# When GENERATE_DOCSET tag is set to YES, this tag specifies a string that 
+# should uniquely identify the documentation set bundle. This should be a 
+# reverse domain-name style string, e.g. com.mycompany.MyDocSet. Doxygen 
+# will append .docset to the name.
+
+DOCSET_BUNDLE_ID       = org.doxygen.Project
+
+# When GENERATE_PUBLISHER_ID tag specifies a string that should uniquely identify 
+# the documentation publisher. This should be a reverse domain-name style 
+# string, e.g. com.mycompany.MyDocSet.documentation.
+
+DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
+
+# The GENERATE_PUBLISHER_NAME tag identifies the documentation publisher.
+
+DOCSET_PUBLISHER_NAME  = Publisher
+
+# If the GENERATE_HTMLHELP tag is set to YES, additional index files 
+# will be generated that can be used as input for tools like the 
+# Microsoft HTML help workshop to generate a compiled HTML help file (.chm) 
+# of the generated HTML documentation.
+
+GENERATE_HTMLHELP      = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can 
+# be used to specify the file name of the resulting .chm file. You 
+# can add a path in front of the file if the result should not be 
+# written to the html output directory.
+
+CHM_FILE               = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can 
+# be used to specify the location (absolute path including file name) of 
+# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run 
+# the HTML help compiler on the generated index.hhp.
+
+HHC_LOCATION           = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag 
+# controls if a separate .chi index file is generated (YES) or that 
+# it should be included in the master .chm file (NO).
+
+GENERATE_CHI           = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_INDEX_ENCODING 
+# is used to encode HtmlHelp index (hhk), content (hhc) and project file 
+# content.
+
+CHM_INDEX_ENCODING     = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag 
+# controls whether a binary table of contents is generated (YES) or a 
+# normal table of contents (NO) in the .chm file.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members 
+# to the contents of the HTML help documentation and to the tree view.
+
+TOC_EXPAND             = NO
+
+# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and 
+# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated 
+# that can be used as input for Qt's qhelpgenerator to generate a 
+# Qt Compressed Help (.qch) of the generated HTML documentation.
+
+GENERATE_QHP           = NO
+
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can 
+# be used to specify the file name of the resulting .qch file. 
+# The path specified is relative to the HTML output folder.
+
+QCH_FILE               = 
+
+# The QHP_NAMESPACE tag specifies the namespace to use when generating 
+# Qt Help Project output. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#namespace
+
+QHP_NAMESPACE          = org.doxygen.Project
+
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating 
+# Qt Help Project output. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#virtual-folders
+
+QHP_VIRTUAL_FOLDER     = doc
+
+# If QHP_CUST_FILTER_NAME is set, it specifies the name of a custom filter to 
+# add. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#custom-filters
+
+QHP_CUST_FILTER_NAME   = 
+
+# The QHP_CUST_FILT_ATTRS tag specifies the list of the attributes of the 
+# custom filter to add. For more information please see 
+# <a href="http://doc.trolltech.com/qthelpproject.html#custom-filters"> 
+# Qt Help Project / Custom Filters</a>.
+
+QHP_CUST_FILTER_ATTRS  = 
+
+# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this 
+# project's 
+# filter section matches. 
+# <a href="http://doc.trolltech.com/qthelpproject.html#filter-attributes"> 
+# Qt Help Project / Filter Attributes</a>.
+
+QHP_SECT_FILTER_ATTRS  = 
+
+# If the GENERATE_QHP tag is set to YES, the QHG_LOCATION tag can 
+# be used to specify the location of Qt's qhelpgenerator. 
+# If non-empty doxygen will try to run qhelpgenerator on the generated 
+# .qhp file.
+
+QHG_LOCATION           = 
+
+# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files  
+# will be generated, which together with the HTML files, form an Eclipse help 
+# plugin. To install this plugin and make it available under the help contents 
+# menu in Eclipse, the contents of the directory containing the HTML and XML 
+# files needs to be copied into the plugins directory of eclipse. The name of 
+# the directory within the plugins directory should be the same as 
+# the ECLIPSE_DOC_ID value. After copying Eclipse needs to be restarted before 
+# the help appears.
+
+GENERATE_ECLIPSEHELP   = NO
+
+# A unique identifier for the eclipse help plugin. When installing the plugin 
+# the directory name containing the HTML and XML files should also have 
+# this name.
+
+ECLIPSE_DOC_ID         = org.doxygen.Project
+
+# The DISABLE_INDEX tag can be used to turn on/off the condensed index at 
+# top of each HTML page. The value NO (the default) enables the index and 
+# the value YES disables it.
+
+DISABLE_INDEX          = NO
+
+# This tag can be used to set the number of enum values (range [1..20]) 
+# that doxygen will group on one line in the generated HTML documentation.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index 
+# structure should be generated to display hierarchical information. 
+# If the tag value is set to YES, a side panel will be generated 
+# containing a tree-like index structure (just like the one that 
+# is generated for HTML Help). For this to work a browser that supports 
+# JavaScript, DHTML, CSS and frames is required (i.e. any modern browser). 
+# Windows users are probably better off using the HTML help feature.
+
+GENERATE_TREEVIEW      = NO
+
+# By enabling USE_INLINE_TREES, doxygen will generate the Groups, Directories, 
+# and Class Hierarchy pages using a tree view instead of an ordered list.
+
+USE_INLINE_TREES       = NO
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be 
+# used to set the initial width (in pixels) of the frame in which the tree 
+# is shown.
+
+TREEVIEW_WIDTH         = 250
+
+# When the EXT_LINKS_IN_WINDOW option is set to YES doxygen will open 
+# links to external symbols imported via tag files in a separate window.
+
+EXT_LINKS_IN_WINDOW    = NO
+
+# Use this tag to change the font size of Latex formulas included 
+# as images in the HTML documentation. The default is 10. Note that 
+# when you change the font size after a successful doxygen run you need 
+# to manually remove any form_*.png images from the HTML output directory 
+# to force them to be regenerated.
+
+FORMULA_FONTSIZE       = 10
+
+# Use the FORMULA_TRANPARENT tag to determine whether or not the images 
+# generated for formulas are transparent PNGs. Transparent PNGs are 
+# not supported properly for IE 6.0, but are supported on all modern browsers. 
+# Note that when changing this option you need to delete any form_*.png files 
+# in the HTML output before the changes have effect.
+
+FORMULA_TRANSPARENT    = YES
+
+# When the SEARCHENGINE tag is enabled doxygen will generate a search box 
+# for the HTML output. The underlying search engine uses javascript 
+# and DHTML and should work on any modern browser. Note that when using 
+# HTML help (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets 
+# (GENERATE_DOCSET) there is already a search function so this one should 
+# typically be disabled. For large projects the javascript based search engine 
+# can be slow, then enabling SERVER_BASED_SEARCH may provide a better solution.
+
+SEARCHENGINE           = YES
+
+# When the SERVER_BASED_SEARCH tag is enabled the search engine will be 
+# implemented using a PHP enabled web server instead of at the web client 
+# using Javascript. Doxygen will generate the search PHP script and index 
+# file to put on the web server. The advantage of the server 
+# based approach is that it scales better to large projects and allows 
+# full text search. The disadvances is that it is more difficult to setup 
+# and does not have live searching capabilities.
+
+SERVER_BASED_SEARCH    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will 
+# generate Latex output.
+
+GENERATE_LATEX         = NO
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `latex' will be used as the default path.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be 
+# invoked. If left blank `latex' will be used as the default command name. 
+# Note that when enabling USE_PDFLATEX this option is only used for 
+# generating bitmaps for formulas in the HTML output, but not in the 
+# Makefile that is written to the output directory.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to 
+# generate index for LaTeX. If left blank `makeindex' will be used as the 
+# default command name.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact 
+# LaTeX documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_LATEX          = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used 
+# by the printer. Possible values are: a4, a4wide, letter, legal and 
+# executive. If left blank a4wide will be used.
+
+PAPER_TYPE             = a4wide
+
+# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX 
+# packages that should be included in the LaTeX output.
+
+EXTRA_PACKAGES         = 
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
+# the generated latex document. The header should contain everything until 
+# the first chapter. If it is left blank doxygen will generate a 
+# standard header. Notice: only use this tag if you know what you are doing!
+
+LATEX_HEADER           = 
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated 
+# is prepared for conversion to pdf (using ps2pdf). The pdf file will 
+# contain links (just like the HTML output) instead of page references 
+# This makes the output suitable for online browsing using a pdf viewer.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of 
+# plain latex in the generated Makefile. Set this option to YES to get a 
+# higher quality PDF documentation.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. 
+# command to the generated LaTeX files. This will instruct LaTeX to keep 
+# running if errors occur, instead of asking the user for help. 
+# This option is also used when generating formulas in HTML.
+
+LATEX_BATCHMODE        = NO
+
+# If LATEX_HIDE_INDICES is set to YES then doxygen will not 
+# include the index chapters (such as File Index, Compound Index, etc.) 
+# in the output.
+
+LATEX_HIDE_INDICES     = NO
+
+# If LATEX_SOURCE_CODE is set to YES then doxygen will include 
+# source code with syntax highlighting in the LaTeX output. 
+# Note that which sources are shown also depends on other settings 
+# such as SOURCE_BROWSER.
+
+LATEX_SOURCE_CODE      = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output 
+# The RTF output is optimized for Word 97 and may not look very pretty with 
+# other RTF readers or editors.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `rtf' will be used as the default path.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES Doxygen generates more compact 
+# RTF documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated 
+# will contain hyperlink fields. The RTF file will 
+# contain links (just like the HTML output) instead of page references. 
+# This makes the output suitable for online browsing using WORD or other 
+# programs which support those fields. 
+# Note: wordpad (write) and others do not support links.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's 
+# config file, i.e. a series of assignments. You only have to provide 
+# replacements, missing definitions are set to their default value.
+
+RTF_STYLESHEET_FILE    = 
+
+# Set optional variables used in the generation of an rtf document. 
+# Syntax is similar to doxygen's config file.
+
+RTF_EXTENSIONS_FILE    = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES (the default) Doxygen will 
+# generate man pages
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `man' will be used as the default path.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to 
+# the generated man pages (default is the subroutine's section .3)
+
+MAN_EXTENSION          = .3
+
+# If the MAN_LINKS tag is set to YES and Doxygen generates man output, 
+# then it will generate one additional man file for each entity 
+# documented in the real man page(s). These additional files 
+# only source the real man page, but without them the man command 
+# would be unable to find the correct page. The default is NO.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES Doxygen will 
+# generate an XML file that captures the structure of 
+# the code including all documentation.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `xml' will be used as the default path.
+
+XML_OUTPUT             = xml
+
+# The XML_SCHEMA tag can be used to specify an XML schema, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_SCHEMA             = 
+
+# The XML_DTD tag can be used to specify an XML DTD, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_DTD                = 
+
+# If the XML_PROGRAMLISTING tag is set to YES Doxygen will 
+# dump the program listings (including syntax highlighting 
+# and cross-referencing information) to the XML output. Note that 
+# enabling this will significantly increase the size of the XML output.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will 
+# generate an AutoGen Definitions (see autogen.sf.net) file 
+# that captures the structure of the code including all 
+# documentation. Note that this feature is still experimental 
+# and incomplete at the moment.
+
+GENERATE_AUTOGEN_DEF   = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_PERLMOD tag is set to YES Doxygen will 
+# generate a Perl module file that captures the structure of 
+# the code including all documentation. Note that this 
+# feature is still experimental and incomplete at the 
+# moment.
+
+GENERATE_PERLMOD       = NO
+
+# If the PERLMOD_LATEX tag is set to YES Doxygen will generate 
+# the necessary Makefile rules, Perl scripts and LaTeX code to be able 
+# to generate PDF and DVI output from the Perl module output.
+
+PERLMOD_LATEX          = NO
+
+# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be 
+# nicely formatted so it can be parsed by a human reader.  This is useful 
+# if you want to understand what is going on.  On the other hand, if this 
+# tag is set to NO the size of the Perl module output will be much smaller 
+# and Perl will parse it just the same.
+
+PERLMOD_PRETTY         = YES
+
+# The names of the make variables in the generated doxyrules.make file 
+# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. 
+# This is useful so different doxyrules.make files included by the same 
+# Makefile don't overwrite each other's variables.
+
+PERLMOD_MAKEVAR_PREFIX = 
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will 
+# evaluate all C-preprocessor directives found in the sources and include 
+# files.
+
+ENABLE_PREPROCESSING   = YES
+
+# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro 
+# names in the source code. If set to NO (the default) only conditional 
+# compilation will be performed. Macro expansion can be done in a controlled 
+# way by setting EXPAND_ONLY_PREDEF to YES.
+
+MACRO_EXPANSION        = NO
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
+# then the macro expansion is limited to the macros specified with the 
+# PREDEFINED and EXPAND_AS_DEFINED tags.
+
+EXPAND_ONLY_PREDEF     = NO
+
+# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
+# in the INCLUDE_PATH (see below) will be search if a #include is found.
+
+SEARCH_INCLUDES        = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that 
+# contain include files that are not input files but should be processed by 
+# the preprocessor.
+
+INCLUDE_PATH           = 
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard 
+# patterns (like *.h and *.hpp) to filter out the header-files in the 
+# directories. If left blank, the patterns specified with FILE_PATTERNS will 
+# be used.
+
+INCLUDE_FILE_PATTERNS  = 
+
+# The PREDEFINED tag can be used to specify one or more macro names that 
+# are defined before the preprocessor is started (similar to the -D option of 
+# gcc). The argument of the tag is a list of macros of the form: name 
+# or name=definition (no spaces). If the definition and the = are 
+# omitted =1 is assumed. To prevent a macro definition from being 
+# undefined via #undef or recursively expanded use the := operator 
+# instead of the = operator.
+
+PREDEFINED             = 
+
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
+# this tag can be used to specify a list of macro names that should be expanded. 
+# The macro definition that is found in the sources will be used. 
+# Use the PREDEFINED tag if you want to use a different macro definition.
+
+EXPAND_AS_DEFINED      = 
+
+# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then 
+# doxygen's preprocessor will remove all function-like macros that are alone 
+# on a line, have an all uppercase name, and do not end with a semicolon. Such 
+# function macros are typically used for boiler-plate code, and will confuse 
+# the parser if not removed.
+
+SKIP_FUNCTION_MACROS   = YES
+
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references
+#---------------------------------------------------------------------------
+
+# The TAGFILES option can be used to specify one or more tagfiles. 
+# Optionally an initial location of the external documentation 
+# can be added for each tagfile. The format of a tag file without 
+# this location is as follows: 
+#   TAGFILES = file1 file2 ... 
+# Adding location for the tag files is done as follows: 
+#   TAGFILES = file1=loc1 "file2 = loc2" ... 
+# where "loc1" and "loc2" can be relative or absolute paths or 
+# URLs. If a location is present for each tag, the installdox tool 
+# does not have to be run to correct the links. 
+# Note that each tag file must have a unique name 
+# (where the name does NOT include the path) 
+# If a tag file is not located in the directory in which doxygen 
+# is run, you must also specify the path to the tagfile here.
+
+TAGFILES               = 
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create 
+# a tag file that is based on the input files it reads.
+
+GENERATE_TAGFILE       = 
+
+# If the ALLEXTERNALS tag is set to YES all external classes will be listed 
+# in the class index. If set to NO only the inherited external classes 
+# will be listed.
+
+ALLEXTERNALS           = NO
+
+# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed 
+# in the modules index. If set to NO, only the current project's groups will 
+# be listed.
+
+EXTERNAL_GROUPS        = YES
+
+# The PERL_PATH should be the absolute path and name of the perl script 
+# interpreter (i.e. the result of `which perl').
+
+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+
+# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will 
+# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base 
+# or super classes. Setting the tag to NO turns the diagrams off. Note that 
+# this option is superseded by the HAVE_DOT option below. This is only a 
+# fallback. It is recommended to install and use dot, since it yields more 
+# powerful graphs.
+
+CLASS_DIAGRAMS         = YES
+
+# You can define message sequence charts within doxygen comments using the \msc 
+# command. Doxygen will then run the mscgen tool (see 
+# http://www.mcternan.me.uk/mscgen/) to produce the chart and insert it in the 
+# documentation. The MSCGEN_PATH tag allows you to specify the directory where 
+# the mscgen tool resides. If left empty the tool is assumed to be found in the 
+# default search path.
+
+MSCGEN_PATH            = 
+
+# If set to YES, the inheritance and collaboration graphs will hide 
+# inheritance and usage relations if the target is undocumented 
+# or is not a class.
+
+HIDE_UNDOC_RELATIONS   = YES
+
+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is 
+# available from the path. This tool is part of Graphviz, a graph visualization 
+# toolkit from AT&T and Lucent Bell Labs. The other options in this section 
+# have no effect if this option is set to NO (the default)
+
+HAVE_DOT               = NO
+
+# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is 
+# allowed to run in parallel. When set to 0 (the default) doxygen will 
+# base this on the number of processors available in the system. You can set it 
+# explicitly to a value larger than 0 to get control over the balance 
+# between CPU load and processing speed.
+
+DOT_NUM_THREADS        = 0
+
+# By default doxygen will write a font called FreeSans.ttf to the output 
+# directory and reference it in all dot files that doxygen generates. This 
+# font does not include all possible unicode characters however, so when you need 
+# these (or just want a differently looking font) you can specify the font name 
+# using DOT_FONTNAME. You need need to make sure dot is able to find the font, 
+# which can be done by putting it in a standard location or by setting the 
+# DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory 
+# containing the font.
+
+DOT_FONTNAME           = FreeSans.ttf
+
+# The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs. 
+# The default size is 10pt.
+
+DOT_FONTSIZE           = 10
+
+# By default doxygen will tell dot to use the output directory to look for the 
+# FreeSans.ttf font (which doxygen will put there itself). If you specify a 
+# different font using DOT_FONTNAME you can set the path where dot 
+# can find it using this tag.
+
+DOT_FONTPATH           = 
+
+# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect inheritance relations. Setting this tag to YES will force the 
+# the CLASS_DIAGRAMS tag to NO.
+
+CLASS_GRAPH            = YES
+
+# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect implementation dependencies (inheritance, containment, and 
+# class references variables) of the class with other documented classes.
+
+COLLABORATION_GRAPH    = YES
+
+# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for groups, showing the direct groups dependencies
+
+GROUP_GRAPHS           = YES
+
+# If the UML_LOOK tag is set to YES doxygen will generate inheritance and 
+# collaboration diagrams in a style similar to the OMG's Unified Modeling 
+# Language.
+
+UML_LOOK               = NO
+
+# If set to YES, the inheritance and collaboration graphs will show the 
+# relations between templates and their instances.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT 
+# tags are set to YES then doxygen will generate a graph for each documented 
+# file showing the direct and indirect include dependencies of the file with 
+# other documented files.
+
+INCLUDE_GRAPH          = YES
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and 
+# HAVE_DOT tags are set to YES then doxygen will generate a graph for each 
+# documented header file showing the documented files that directly or 
+# indirectly include this file.
+
+INCLUDED_BY_GRAPH      = YES
+
+# If the CALL_GRAPH and HAVE_DOT options are set to YES then 
+# doxygen will generate a call dependency graph for every global function 
+# or class method. Note that enabling this option will significantly increase 
+# the time of a run. So in most cases it will be better to enable call graphs 
+# for selected functions only using the \callgraph command.
+
+CALL_GRAPH             = NO
+
+# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then 
+# doxygen will generate a caller dependency graph for every global function 
+# or class method. Note that enabling this option will significantly increase 
+# the time of a run. So in most cases it will be better to enable caller 
+# graphs for selected functions only using the \callergraph command.
+
+CALLER_GRAPH           = NO
+
+# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
+# will graphical hierarchy of all classes instead of a textual one.
+
+GRAPHICAL_HIERARCHY    = YES
+
+# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES 
+# then doxygen will show the dependencies a directory has on other directories 
+# in a graphical way. The dependency relations are determined by the #include 
+# relations between the files in the directories.
+
+DIRECTORY_GRAPH        = YES
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images 
+# generated by dot. Possible values are png, jpg, or gif 
+# If left blank png will be used.
+
+DOT_IMAGE_FORMAT       = png
+
+# The tag DOT_PATH can be used to specify the path where the dot tool can be 
+# found. If left blank, it is assumed the dot tool can be found in the path.
+
+DOT_PATH               = 
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that 
+# contain dot files that are included in the documentation (see the 
+# \dotfile command).
+
+DOTFILE_DIRS           = 
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of 
+# nodes that will be shown in the graph. If the number of nodes in a graph 
+# becomes larger than this value, doxygen will truncate the graph, which is 
+# visualized by representing a node as a red box. Note that doxygen if the 
+# number of direct children of the root node in a graph is already larger than 
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note 
+# that the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+
+DOT_GRAPH_MAX_NODES    = 50
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the 
+# graphs generated by dot. A depth value of 3 means that only nodes reachable 
+# from the root by following a path via at most 3 edges will be shown. Nodes 
+# that lay further from the root node will be omitted. Note that setting this 
+# option to 1 or 2 may greatly reduce the computation time needed for large 
+# code bases. Also note that the size of a graph can be further restricted by 
+# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent 
+# background. This is disabled by default, because dot on Windows does not 
+# seem to support this out of the box. Warning: Depending on the platform used, 
+# enabling this option may lead to badly anti-aliased labels on the edges of 
+# a graph (i.e. they become hard to read).
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output 
+# files in one run (i.e. multiple -o and -T options on the command line). This 
+# makes dot run faster, but since only newer versions of dot (>1.8.10) 
+# support this, this feature is disabled by default.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will 
+# generate a legend page explaining the meaning of the various boxes and 
+# arrows in the dot generated graphs.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will 
+# remove the intermediate dot files that are used to generate 
+# the various graphs.
+
+DOT_CLEANUP            = YES
diff --git a/Doxyfile.devel b/Doxyfile.devel
new file mode 100644
index 0000000..4b73045
--- /dev/null
+++ b/Doxyfile.devel
@@ -0,0 +1,1634 @@
+# Doxyfile 1.7.1
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project
+#
+# All text after a hash (#) is considered a comment and will be ignored
+# The format is:
+#       TAG = value [value, ...]
+# For lists items can also be appended using:
+#       TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (" ")
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# This tag specifies the encoding used for all characters in the config file 
+# that follow. The default is UTF-8 which is also the encoding used for all 
+# text before the first occurrence of this tag. Doxygen uses libiconv (or the 
+# iconv built into libc) for the transcoding. See 
+# http://www.gnu.org/software/libiconv for the list of possible encodings.
+
+DOXYFILE_ENCODING      = UTF-8
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded 
+# by quotes) that should identify the project.
+
+PROJECT_NAME           = Knot
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. 
+# This could be handy for archiving the generated documentation or 
+# if some version control system is used.
+
+PROJECT_NUMBER         = 0.1.0
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
+# base path where the generated documentation will be put. 
+# If a relative path is entered, it will be relative to the location 
+# where doxygen was started. If left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       = doc-devel
+
+# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create 
+# 4096 sub-directories (in 2 levels) under the output directory of each output 
+# format and will distribute the generated files over these directories. 
+# Enabling this option can be useful when feeding doxygen a huge amount of 
+# source files, where putting all generated files in the same directory would 
+# otherwise cause performance problems for the file system.
+
+CREATE_SUBDIRS         = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all 
+# documentation generated by doxygen is written. Doxygen will use this 
+# information to generate all constant output in the proper language. 
+# The default language is English, other supported languages are: 
+# Afrikaans, Arabic, Brazilian, Catalan, Chinese, Chinese-Traditional, 
+# Croatian, Czech, Danish, Dutch, Esperanto, Farsi, Finnish, French, German, 
+# Greek, Hungarian, Italian, Japanese, Japanese-en (Japanese with English 
+# messages), Korean, Korean-en, Lithuanian, Norwegian, Macedonian, Persian, 
+# Polish, Portuguese, Romanian, Russian, Serbian, Serbian-Cyrilic, Slovak, 
+# Slovene, Spanish, Swedish, Ukrainian, and Vietnamese.
+
+OUTPUT_LANGUAGE        = English
+
+# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will 
+# include brief member descriptions after the members that are listed in 
+# the file and class documentation (similar to JavaDoc). 
+# Set to NO to disable this.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend 
+# the brief description of a member or function before the detailed description. 
+# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the 
+# brief descriptions will be completely suppressed.
+
+REPEAT_BRIEF           = YES
+
+# This tag implements a quasi-intelligent brief description abbreviator 
+# that is used to form the text in various listings. Each string 
+# in this list, if found as the leading text of the brief description, will be 
+# stripped from the text and the result after processing the whole list, is 
+# used as the annotated text. Otherwise, the brief description is used as-is. 
+# If left blank, the following values are used ("$name" is automatically 
+# replaced with the name of the entity): "The $name class" "The $name widget" 
+# "The $name file" "is" "provides" "specifies" "contains" 
+# "represents" "a" "an" "the"
+
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then 
+# Doxygen will generate a detailed section even if there is only a brief 
+# description.
+
+ALWAYS_DETAILED_SEC    = YES
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all 
+# inherited members of a class in the documentation of that class as if those 
+# members were ordinary class members. Constructors, destructors and assignment 
+# operators of the base classes will not be shown.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full 
+# path before files name in the file list and in the header files. If set 
+# to NO the shortest path that makes the file name unique will be used.
+
+FULL_PATH_NAMES        = YES
+
+# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag 
+# can be used to strip a user-defined part of the path. Stripping is 
+# only done if one of the specified strings matches the left-hand part of 
+# the path. The tag can be used to show relative paths in the file list. 
+# If left blank the directory from which doxygen is run is used as the 
+# path to strip.
+
+STRIP_FROM_PATH        =  \
+                         src/
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of 
+# the path mentioned in the documentation of a class, which tells 
+# the reader which header file to include in order to use a class. 
+# If left blank only the name of the header file containing the class 
+# definition is used. Otherwise one should specify the include paths that 
+# are normally passed to the compiler using the -I flag.
+
+STRIP_FROM_INC_PATH    = 
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter 
+# (but less readable) file names. This can be useful is your file systems 
+# doesn't support long names like on DOS, Mac, or CD-ROM.
+
+SHORT_NAMES            = NO
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen 
+# will interpret the first line (until the first dot) of a JavaDoc-style 
+# comment as the brief description. If set to NO, the JavaDoc 
+# comments will behave just like regular Qt-style comments 
+# (thus requiring an explicit @brief command for a brief description.)
+
+JAVADOC_AUTOBRIEF      = NO
+
+# If the QT_AUTOBRIEF tag is set to YES then Doxygen will 
+# interpret the first line (until the first dot) of a Qt-style 
+# comment as the brief description. If set to NO, the comments 
+# will behave just like regular Qt-style comments (thus requiring 
+# an explicit \brief command for a brief description.)
+
+QT_AUTOBRIEF           = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen 
+# treat a multi-line C++ special comment block (i.e. a block of //! or /// 
+# comments) as a brief description. This used to be the default behaviour. 
+# The new default is to treat a multi-line C++ comment block as a detailed 
+# description. Set this tag to YES if you prefer the old behaviour instead.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented 
+# member inherits the documentation from any documented member that it 
+# re-implements.
+
+INHERIT_DOCS           = YES
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce 
+# a new page for each member. If set to NO, the documentation of a member will 
+# be part of the file/class/namespace that contains it.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. 
+# Doxygen uses this value to replace tabs by spaces in code fragments.
+
+TAB_SIZE               = 8
+
+# This tag can be used to specify a number of aliases that acts 
+# as commands in the documentation. An alias has the form "name=value". 
+# For example adding "sideeffect=\par Side Effects:\n" will allow you to 
+# put the command \sideeffect (or @sideeffect) in the documentation, which 
+# will result in a user-defined paragraph with heading "Side Effects:". 
+# You can put \n's in the value part of an alias to insert newlines.
+
+ALIASES                = 
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C 
+# sources only. Doxygen will then generate output that is more tailored for C. 
+# For instance, some of the names that are used will be different. The list 
+# of all members will be omitted, etc.
+
+OPTIMIZE_OUTPUT_FOR_C  = YES
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java 
+# sources only. Doxygen will then generate output that is more tailored for 
+# Java. For instance, namespaces will be presented as packages, qualified 
+# scopes will look different, etc.
+
+OPTIMIZE_OUTPUT_JAVA   = NO
+
+# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran 
+# sources only. Doxygen will then generate output that is more tailored for 
+# Fortran.
+
+OPTIMIZE_FOR_FORTRAN   = NO
+
+# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL 
+# sources. Doxygen will then generate output that is tailored for 
+# VHDL.
+
+OPTIMIZE_OUTPUT_VHDL   = NO
+
+# Doxygen selects the parser to use depending on the extension of the files it 
+# parses. With this tag you can assign which parser to use for a given extension. 
+# Doxygen has a built-in mapping, but you can override or extend it using this 
+# tag. The format is ext=language, where ext is a file extension, and language 
+# is one of the parsers supported by doxygen: IDL, Java, Javascript, CSharp, C, 
+# C++, D, PHP, Objective-C, Python, Fortran, VHDL, C, C++. For instance to make 
+# doxygen treat .inc files as Fortran files (default is PHP), and .f files as C 
+# (default is Fortran), use: inc=Fortran f=C. Note that for custom extensions 
+# you also need to set FILE_PATTERNS otherwise the files are not read by doxygen.
+
+EXTENSION_MAPPING      = 
+
+# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want 
+# to include (a tag file for) the STL sources as input, then you should 
+# set this tag to YES in order to let doxygen match functions declarations and 
+# definitions whose arguments contain STL classes (e.g. func(std::string); v.s. 
+# func(std::string) {}). This also make the inheritance and collaboration 
+# diagrams that involve STL classes more complete and accurate.
+
+BUILTIN_STL_SUPPORT    = NO
+
+# If you use Microsoft's C++/CLI language, you should set this option to YES to 
+# enable parsing support.
+
+CPP_CLI_SUPPORT        = NO
+
+# Set the SIP_SUPPORT tag to YES if your project consists of sip sources only. 
+# Doxygen will parse them like normal C++ but will assume all classes use public 
+# instead of private inheritance when no explicit protection keyword is present.
+
+SIP_SUPPORT            = NO
+
+# For Microsoft's IDL there are propget and propput attributes to indicate getter 
+# and setter methods for a property. Setting this option to YES (the default) 
+# will make doxygen to replace the get and set methods by a property in the 
+# documentation. This will only work if the methods are indeed getting or 
+# setting a simple type. If this is not the case, or you want to show the 
+# methods anyway, you should set this option to NO.
+
+IDL_PROPERTY_SUPPORT   = YES
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC 
+# tag is set to YES, then doxygen will reuse the documentation of the first 
+# member in the group (if any) for the other members of the group. By default 
+# all members of a group must be documented explicitly.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# Set the SUBGROUPING tag to YES (the default) to allow class member groups of 
+# the same type (for instance a group of public functions) to be put as a 
+# subgroup of that type (e.g. under the Public Functions section). Set it to 
+# NO to prevent subgrouping. Alternatively, this can be done per class using 
+# the \nosubgrouping command.
+
+SUBGROUPING            = YES
+
+# When TYPEDEF_HIDES_STRUCT is enabled, a typedef of a struct, union, or enum 
+# is documented as struct, union, or enum with the name of the typedef. So 
+# typedef struct TypeS {} TypeT, will appear in the documentation as a struct 
+# with name TypeT. When disabled the typedef will appear as a member of a file, 
+# namespace, or class. And the struct will be named TypeS. This can typically 
+# be useful for C code in case the coding convention dictates that all compound 
+# types are typedef'ed and only the typedef is referenced, never the tag name.
+
+TYPEDEF_HIDES_STRUCT   = YES
+
+# The SYMBOL_CACHE_SIZE determines the size of the internal cache use to 
+# determine which symbols to keep in memory and which to flush to disk. 
+# When the cache is full, less often used symbols will be written to disk. 
+# For small to medium size projects (<1000 input files) the default value is 
+# probably good enough. For larger projects a too small cache size can cause 
+# doxygen to be busy swapping symbols to and from disk most of the time 
+# causing a significant performance penality. 
+# If the system has enough physical memory increasing the cache will improve the 
+# performance by keeping more symbols in memory. Note that the value works on 
+# a logarithmic scale so increasing the size by one will rougly double the 
+# memory usage. The cache size is given by this formula: 
+# 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0, 
+# corresponding to a cache size of 2^16 = 65536 symbols
+
+SYMBOL_CACHE_SIZE      = 0
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in 
+# documentation are documented, even if no documentation was available. 
+# Private class members and static file members will be hidden unless 
+# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
+
+EXTRACT_ALL            = YES
+
+# If the EXTRACT_PRIVATE tag is set to YES all private members of a class 
+# will be included in the documentation.
+
+EXTRACT_PRIVATE        = NO
+
+# If the EXTRACT_STATIC tag is set to YES all static members of a file 
+# will be included in the documentation.
+
+EXTRACT_STATIC         = YES
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) 
+# defined locally in source files will be included in the documentation. 
+# If set to NO only classes defined in header files are included.
+
+EXTRACT_LOCAL_CLASSES  = YES
+
+# This flag is only useful for Objective-C code. When set to YES local 
+# methods, which are defined in the implementation section but not in 
+# the interface are included in the documentation. 
+# If set to NO (the default) only methods in the interface are included.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If this flag is set to YES, the members of anonymous namespaces will be 
+# extracted and appear in the documentation as a namespace called 
+# 'anonymous_namespace{file}', where file will be replaced with the base 
+# name of the file that contains the anonymous namespace. By default 
+# anonymous namespace are hidden.
+
+EXTRACT_ANON_NSPACES   = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all 
+# undocumented members of documented classes, files or namespaces. 
+# If set to NO (the default) these members will be included in the 
+# various overviews, but no documentation section is generated. 
+# This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_MEMBERS     = NO
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all 
+# undocumented classes that are normally visible in the class hierarchy. 
+# If set to NO (the default) these classes will be included in the various 
+# overviews. This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_CLASSES     = NO
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all 
+# friend (class|struct|union) declarations. 
+# If set to NO (the default) these declarations will be included in the 
+# documentation.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any 
+# documentation blocks found inside the body of a function. 
+# If set to NO (the default) these blocks will be appended to the 
+# function's detailed documentation block.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation 
+# that is typed after a \internal command is included. If the tag is set 
+# to NO (the default) then the documentation will be excluded. 
+# Set it to YES to include the internal documentation.
+
+INTERNAL_DOCS          = NO
+
+# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate 
+# file names in lower-case letters. If set to YES upper-case letters are also 
+# allowed. This is useful if you have classes or files whose names only differ 
+# in case and if your file system supports case sensitive file names. Windows 
+# and Mac users are advised to set this option to NO.
+
+CASE_SENSE_NAMES       = NO
+
+# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen 
+# will show members with their full class and namespace scopes in the 
+# documentation. If set to YES the scope will be hidden.
+
+HIDE_SCOPE_NAMES       = YES
+
+# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen 
+# will put a list of the files that are included by a file in the documentation 
+# of that file.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the FORCE_LOCAL_INCLUDES tag is set to YES then Doxygen 
+# will list include files with double quotes in the documentation 
+# rather than with sharp brackets.
+
+FORCE_LOCAL_INCLUDES   = NO
+
+# If the INLINE_INFO tag is set to YES (the default) then a tag [inline] 
+# is inserted in the documentation for inline members.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen 
+# will sort the (detailed) documentation of file and class members 
+# alphabetically by member name. If set to NO the members will appear in 
+# declaration order.
+
+SORT_MEMBER_DOCS       = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the 
+# brief documentation of file, namespace and class members alphabetically 
+# by member name. If set to NO (the default) the members will appear in 
+# declaration order.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen 
+# will sort the (brief and detailed) documentation of class members so that 
+# constructors and destructors are listed first. If set to NO (the default) 
+# the constructors will appear in the respective orders defined by 
+# SORT_MEMBER_DOCS and SORT_BRIEF_DOCS. 
+# This tag will be ignored for brief docs if SORT_BRIEF_DOCS is set to NO 
+# and ignored for detailed docs if SORT_MEMBER_DOCS is set to NO.
+
+SORT_MEMBERS_CTORS_1ST = NO
+
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the 
+# hierarchy of group names into alphabetical order. If set to NO (the default) 
+# the group names will appear in their defined order.
+
+SORT_GROUP_NAMES       = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be 
+# sorted by fully-qualified names, including namespaces. If set to 
+# NO (the default), the class list will be sorted only by class name, 
+# not including the namespace part. 
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES. 
+# Note: This option applies only to the class list, not to the 
+# alphabetical list.
+
+SORT_BY_SCOPE_NAME     = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or 
+# disable (NO) the todo list. This list is created by putting \todo 
+# commands in the documentation.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or 
+# disable (NO) the test list. This list is created by putting \test 
+# commands in the documentation.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or 
+# disable (NO) the bug list. This list is created by putting \bug 
+# commands in the documentation.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or 
+# disable (NO) the deprecated list. This list is created by putting 
+# \deprecated commands in the documentation.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional 
+# documentation sections, marked by \if sectionname ... \endif.
+
+ENABLED_SECTIONS       = 
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines 
+# the initial value of a variable or define consists of for it to appear in 
+# the documentation. If the initializer consists of more lines than specified 
+# here it will be hidden. Use a value of 0 to hide initializers completely. 
+# The appearance of the initializer of individual variables and defines in the 
+# documentation can be controlled using \showinitializer or \hideinitializer 
+# command in the documentation regardless of this setting.
+
+MAX_INITIALIZER_LINES  = 50
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated 
+# at the bottom of the documentation of classes and structs. If set to YES the 
+# list will mention the files that were used to generate the documentation.
+
+SHOW_USED_FILES        = YES
+
+# If the sources in your project are distributed over multiple directories 
+# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy 
+# in the documentation. The default is NO.
+
+SHOW_DIRECTORIES       = YES
+
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page. 
+# This will remove the Files entry from the Quick Index and from the 
+# Folder Tree View (if specified). The default is YES.
+
+SHOW_FILES             = YES
+
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the 
+# Namespaces page.  This will remove the Namespaces entry from the Quick Index 
+# and from the Folder Tree View (if specified). The default is YES.
+
+SHOW_NAMESPACES        = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that 
+# doxygen should invoke to get the current version for each file (typically from 
+# the version control system). Doxygen will invoke the program by executing (via 
+# popen()) the command <command> <input-file>, where <command> is the value of 
+# the FILE_VERSION_FILTER tag, and <input-file> is the name of an input file 
+# provided by doxygen. Whatever the program writes to standard output 
+# is used as the file version. See the manual for examples.
+
+FILE_VERSION_FILTER    = 
+
+# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed 
+# by doxygen. The layout file controls the global structure of the generated 
+# output files in an output format independent way. The create the layout file 
+# that represents doxygen's defaults, run doxygen with the -l option. 
+# You can optionally specify a file name after the option, if omitted 
+# DoxygenLayout.xml will be used as the name of the layout file.
+
+LAYOUT_FILE            = 
+
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated 
+# by doxygen. Possible values are YES and NO. If left blank NO is used.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are 
+# generated by doxygen. Possible values are YES and NO. If left blank 
+# NO is used.
+
+WARNINGS               = YES
+
+# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings 
+# for undocumented members. If EXTRACT_ALL is set to YES then this flag will 
+# automatically be disabled.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for 
+# potential errors in the documentation, such as not documenting some 
+# parameters in a documented function, or documenting parameters that 
+# don't exist or using markup commands wrongly.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be abled to get warnings for 
+# functions that are documented, but have no documentation for their parameters 
+# or return value. If set to NO (the default) doxygen will only warn about 
+# wrong or incomplete parameter documentation, but not about the absence of 
+# documentation.
+
+WARN_NO_PARAMDOC       = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that 
+# doxygen can produce. The string should contain the $file, $line, and $text 
+# tags, which will be replaced by the file and line number from which the 
+# warning originated and the warning text. Optionally the format may contain 
+# $version, which will be replaced by the version of the file (if it could 
+# be obtained via FILE_VERSION_FILTER)
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning 
+# and error messages should be written. If left blank the output is written 
+# to stderr.
+
+WARN_LOGFILE           = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag can be used to specify the files and/or directories that contain 
+# documented source files. You may enter file names like "myfile.cpp" or 
+# directories like "/usr/src/myproject". Separate the files or directories 
+# with spaces.
+
+INPUT                  = src/ \
+                         Doxy.page.h
+
+# This tag can be used to specify the character encoding of the source files 
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is 
+# also the default input encoding. Doxygen uses libiconv (or the iconv built 
+# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for 
+# the list of possible encodings.
+
+INPUT_ENCODING         = UTF-8
+
+# If the value of the INPUT tag contains directories, you can use the 
+# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank the following patterns are tested: 
+# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx 
+# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.py *.f90
+
+FILE_PATTERNS          = *.c \
+                         *.h
+
+# The RECURSIVE tag can be used to turn specify whether or not subdirectories 
+# should be searched for input files as well. Possible values are YES and NO. 
+# If left blank NO is used.
+
+RECURSIVE              = YES
+
+# The EXCLUDE tag can be used to specify files and/or directories that should 
+# excluded from the INPUT source files. This way you can easily exclude a 
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+
+EXCLUDE                = 
+
+# The EXCLUDE_SYMLINKS tag can be used select whether or not files or 
+# directories that are symbolic links (a Unix filesystem feature) are excluded 
+# from the input.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the 
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude 
+# certain files from those directories. Note that the wildcards are matched 
+# against the file with absolute path, so to exclude all test directories 
+# for example use the pattern */test/*
+
+EXCLUDE_PATTERNS       = 
+
+# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names 
+# (namespaces, classes, functions, etc.) that should be excluded from the 
+# output. The symbol name can be a fully qualified name, a word, or if the 
+# wildcard * is used, a substring. Examples: ANamespace, AClass, 
+# AClass::ANamespace, ANamespace::*Test
+
+EXCLUDE_SYMBOLS        = 
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or 
+# directories that contain example code fragments that are included (see 
+# the \include command).
+
+EXAMPLE_PATH           = 
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the 
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank all files are included.
+
+EXAMPLE_PATTERNS       = *
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be 
+# searched for input files to be used with the \include or \dontinclude 
+# commands irrespective of the value of the RECURSIVE tag. 
+# Possible values are YES and NO. If left blank NO is used.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or 
+# directories that contain image that are included in the documentation (see 
+# the \image command).
+
+IMAGE_PATH             = 
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should 
+# invoke to filter for each input file. Doxygen will invoke the filter program 
+# by executing (via popen()) the command <filter> <input-file>, where <filter> 
+# is the value of the INPUT_FILTER tag, and <input-file> is the name of an 
+# input file. Doxygen will then use the output that the filter program writes 
+# to standard output.  If FILTER_PATTERNS is specified, this tag will be 
+# ignored.
+
+INPUT_FILTER           = 
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern 
+# basis.  Doxygen will compare the file name with each pattern and apply the 
+# filter if there is a match.  The filters are a list of the form: 
+# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further 
+# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER 
+# is applied to all files.
+
+FILTER_PATTERNS        = 
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using 
+# INPUT_FILTER) will be used to filter the input files when producing source 
+# files to browse (i.e. when SOURCE_BROWSER is set to YES).
+
+FILTER_SOURCE_FILES    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will 
+# be generated. Documented entities will be cross-referenced with these sources. 
+# Note: To get rid of all source code in the generated output, make sure also 
+# VERBATIM_HEADERS is set to NO.
+
+SOURCE_BROWSER         = YES
+
+# Setting the INLINE_SOURCES tag to YES will include the body 
+# of functions and classes directly in the documentation.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct 
+# doxygen to hide any special comment blocks from generated source code 
+# fragments. Normal C and C++ comments will always remain visible.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES 
+# then for each documented function all documented 
+# functions referencing it will be listed.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES 
+# then for each documented function all documented entities 
+# called/used by that function will be listed.
+
+REFERENCES_RELATION    = NO
+
+# If the REFERENCES_LINK_SOURCE tag is set to YES (the default) 
+# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from 
+# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will 
+# link to the source code.  Otherwise they will link to the documentation.
+
+REFERENCES_LINK_SOURCE = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code 
+# will point to the HTML generated by the htags(1) tool instead of doxygen 
+# built-in source browser. The htags tool is part of GNU's global source 
+# tagging system (see http://www.gnu.org/software/global/global.html). You 
+# will need version 4.8.6 or higher.
+
+USE_HTAGS              = NO
+
+# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen 
+# will generate a verbatim copy of the header file for each class for 
+# which an include is specified. Set to NO to disable this.
+
+VERBATIM_HEADERS       = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index 
+# of all compounds will be generated. Enable this if the project 
+# contains a lot of classes, structs, unions or interfaces.
+
+ALPHABETICAL_INDEX     = YES
+
+# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then 
+# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns 
+# in which this list will be split (can be a number in the range [1..20])
+
+COLS_IN_ALPHA_INDEX    = 5
+
+# In case all classes in a project start with a common prefix, all 
+# classes will be put under the same header in the alphabetical index. 
+# The IGNORE_PREFIX tag can be used to specify one or more prefixes that 
+# should be ignored while generating the index headers.
+
+IGNORE_PREFIX          = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES (the default) Doxygen will 
+# generate HTML output.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `html' will be used as the default path.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for 
+# each generated HTML page (for example: .htm,.php,.asp). If it is left blank 
+# doxygen will generate files with .html extension.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a personal HTML header for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard header.
+
+HTML_HEADER            = 
+
+# The HTML_FOOTER tag can be used to specify a personal HTML footer for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard footer.
+
+HTML_FOOTER            = 
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading 
+# style sheet that is used by each HTML page. It can be used to 
+# fine-tune the look of the HTML output. If the tag is left blank doxygen 
+# will generate a default style sheet. Note that doxygen will try to copy 
+# the style sheet file to the HTML output directory, so don't put your own 
+# stylesheet in the HTML output directory as well, or it will be erased!
+
+HTML_STYLESHEET        = 
+
+# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. 
+# Doxygen will adjust the colors in the stylesheet and background images 
+# according to this color. Hue is specified as an angle on a colorwheel, 
+# see http://en.wikipedia.org/wiki/Hue for more information. 
+# For instance the value 0 represents red, 60 is yellow, 120 is green, 
+# 180 is cyan, 240 is blue, 300 purple, and 360 is red again. 
+# The allowed range is 0 to 359.
+
+HTML_COLORSTYLE_HUE    = 220
+
+# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of 
+# the colors in the HTML output. For a value of 0 the output will use 
+# grayscales only. A value of 255 will produce the most vivid colors.
+
+HTML_COLORSTYLE_SAT    = 100
+
+# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to 
+# the luminance component of the colors in the HTML output. Values below 
+# 100 gradually make the output lighter, whereas values above 100 make 
+# the output darker. The value divided by 100 is the actual gamma applied, 
+# so 80 represents a gamma of 0.8, The value 220 represents a gamma of 2.2, 
+# and 100 does not change the gamma.
+
+HTML_COLORSTYLE_GAMMA  = 80
+
+# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML 
+# page will contain the date and time when the page was generated. Setting 
+# this to NO can help when comparing the output of multiple runs.
+
+HTML_TIMESTAMP         = YES
+
+# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, 
+# files or namespaces will be aligned in HTML using tables. If set to 
+# NO a bullet list will be used.
+
+HTML_ALIGN_MEMBERS     = YES
+
+# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML 
+# documentation will contain sections that can be hidden and shown after the 
+# page has loaded. For this to work a browser that supports 
+# JavaScript and DHTML is required (for instance Mozilla 1.0+, Firefox 
+# Netscape 6.0+, Internet explorer 5.0+, Konqueror, or Safari).
+
+HTML_DYNAMIC_SECTIONS  = NO
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files 
+# will be generated that can be used as input for Apple's Xcode 3 
+# integrated development environment, introduced with OSX 10.5 (Leopard). 
+# To create a documentation set, doxygen will generate a Makefile in the 
+# HTML output directory. Running make will produce the docset in that 
+# directory and running "make install" will install the docset in 
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find 
+# it at startup. 
+# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html 
+# for more information.
+
+GENERATE_DOCSET        = NO
+
+# When GENERATE_DOCSET tag is set to YES, this tag determines the name of the 
+# feed. A documentation feed provides an umbrella under which multiple 
+# documentation sets from a single provider (such as a company or product suite) 
+# can be grouped.
+
+DOCSET_FEEDNAME        = "Doxygen generated docs"
+
+# When GENERATE_DOCSET tag is set to YES, this tag specifies a string that 
+# should uniquely identify the documentation set bundle. This should be a 
+# reverse domain-name style string, e.g. com.mycompany.MyDocSet. Doxygen 
+# will append .docset to the name.
+
+DOCSET_BUNDLE_ID       = org.doxygen.Project
+
+# When GENERATE_PUBLISHER_ID tag specifies a string that should uniquely identify 
+# the documentation publisher. This should be a reverse domain-name style 
+# string, e.g. com.mycompany.MyDocSet.documentation.
+
+DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
+
+# The GENERATE_PUBLISHER_NAME tag identifies the documentation publisher.
+
+DOCSET_PUBLISHER_NAME  = Publisher
+
+# If the GENERATE_HTMLHELP tag is set to YES, additional index files 
+# will be generated that can be used as input for tools like the 
+# Microsoft HTML help workshop to generate a compiled HTML help file (.chm) 
+# of the generated HTML documentation.
+
+GENERATE_HTMLHELP      = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can 
+# be used to specify the file name of the resulting .chm file. You 
+# can add a path in front of the file if the result should not be 
+# written to the html output directory.
+
+CHM_FILE               = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can 
+# be used to specify the location (absolute path including file name) of 
+# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run 
+# the HTML help compiler on the generated index.hhp.
+
+HHC_LOCATION           = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag 
+# controls if a separate .chi index file is generated (YES) or that 
+# it should be included in the master .chm file (NO).
+
+GENERATE_CHI           = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_INDEX_ENCODING 
+# is used to encode HtmlHelp index (hhk), content (hhc) and project file 
+# content.
+
+CHM_INDEX_ENCODING     = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag 
+# controls whether a binary table of contents is generated (YES) or a 
+# normal table of contents (NO) in the .chm file.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members 
+# to the contents of the HTML help documentation and to the tree view.
+
+TOC_EXPAND             = NO
+
+# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and 
+# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated 
+# that can be used as input for Qt's qhelpgenerator to generate a 
+# Qt Compressed Help (.qch) of the generated HTML documentation.
+
+GENERATE_QHP           = NO
+
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can 
+# be used to specify the file name of the resulting .qch file. 
+# The path specified is relative to the HTML output folder.
+
+QCH_FILE               = 
+
+# The QHP_NAMESPACE tag specifies the namespace to use when generating 
+# Qt Help Project output. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#namespace
+
+QHP_NAMESPACE          = org.doxygen.Project
+
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating 
+# Qt Help Project output. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#virtual-folders
+
+QHP_VIRTUAL_FOLDER     = doc
+
+# If QHP_CUST_FILTER_NAME is set, it specifies the name of a custom filter to 
+# add. For more information please see 
+# http://doc.trolltech.com/qthelpproject.html#custom-filters
+
+QHP_CUST_FILTER_NAME   = 
+
+# The QHP_CUST_FILT_ATTRS tag specifies the list of the attributes of the 
+# custom filter to add. For more information please see 
+# <a href="http://doc.trolltech.com/qthelpproject.html#custom-filters"> 
+# Qt Help Project / Custom Filters</a>.
+
+QHP_CUST_FILTER_ATTRS  = 
+
+# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this 
+# project's 
+# filter section matches. 
+# <a href="http://doc.trolltech.com/qthelpproject.html#filter-attributes"> 
+# Qt Help Project / Filter Attributes</a>.
+
+QHP_SECT_FILTER_ATTRS  = 
+
+# If the GENERATE_QHP tag is set to YES, the QHG_LOCATION tag can 
+# be used to specify the location of Qt's qhelpgenerator. 
+# If non-empty doxygen will try to run qhelpgenerator on the generated 
+# .qhp file.
+
+QHG_LOCATION           = 
+
+# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files  
+# will be generated, which together with the HTML files, form an Eclipse help 
+# plugin. To install this plugin and make it available under the help contents 
+# menu in Eclipse, the contents of the directory containing the HTML and XML 
+# files needs to be copied into the plugins directory of eclipse. The name of 
+# the directory within the plugins directory should be the same as 
+# the ECLIPSE_DOC_ID value. After copying Eclipse needs to be restarted before 
+# the help appears.
+
+GENERATE_ECLIPSEHELP   = NO
+
+# A unique identifier for the eclipse help plugin. When installing the plugin 
+# the directory name containing the HTML and XML files should also have 
+# this name.
+
+ECLIPSE_DOC_ID         = org.doxygen.Project
+
+# The DISABLE_INDEX tag can be used to turn on/off the condensed index at 
+# top of each HTML page. The value NO (the default) enables the index and 
+# the value YES disables it.
+
+DISABLE_INDEX          = NO
+
+# This tag can be used to set the number of enum values (range [1..20]) 
+# that doxygen will group on one line in the generated HTML documentation.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index 
+# structure should be generated to display hierarchical information. 
+# If the tag value is set to YES, a side panel will be generated 
+# containing a tree-like index structure (just like the one that 
+# is generated for HTML Help). For this to work a browser that supports 
+# JavaScript, DHTML, CSS and frames is required (i.e. any modern browser). 
+# Windows users are probably better off using the HTML help feature.
+
+GENERATE_TREEVIEW      = NO
+
+# By enabling USE_INLINE_TREES, doxygen will generate the Groups, Directories, 
+# and Class Hierarchy pages using a tree view instead of an ordered list.
+
+USE_INLINE_TREES       = NO
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be 
+# used to set the initial width (in pixels) of the frame in which the tree 
+# is shown.
+
+TREEVIEW_WIDTH         = 250
+
+# When the EXT_LINKS_IN_WINDOW option is set to YES doxygen will open 
+# links to external symbols imported via tag files in a separate window.
+
+EXT_LINKS_IN_WINDOW    = NO
+
+# Use this tag to change the font size of Latex formulas included 
+# as images in the HTML documentation. The default is 10. Note that 
+# when you change the font size after a successful doxygen run you need 
+# to manually remove any form_*.png images from the HTML output directory 
+# to force them to be regenerated.
+
+FORMULA_FONTSIZE       = 10
+
+# Use the FORMULA_TRANPARENT tag to determine whether or not the images 
+# generated for formulas are transparent PNGs. Transparent PNGs are 
+# not supported properly for IE 6.0, but are supported on all modern browsers. 
+# Note that when changing this option you need to delete any form_*.png files 
+# in the HTML output before the changes have effect.
+
+FORMULA_TRANSPARENT    = YES
+
+# When the SEARCHENGINE tag is enabled doxygen will generate a search box 
+# for the HTML output. The underlying search engine uses javascript 
+# and DHTML and should work on any modern browser. Note that when using 
+# HTML help (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets 
+# (GENERATE_DOCSET) there is already a search function so this one should 
+# typically be disabled. For large projects the javascript based search engine 
+# can be slow, then enabling SERVER_BASED_SEARCH may provide a better solution.
+
+SEARCHENGINE           = YES
+
+# When the SERVER_BASED_SEARCH tag is enabled the search engine will be 
+# implemented using a PHP enabled web server instead of at the web client 
+# using Javascript. Doxygen will generate the search PHP script and index 
+# file to put on the web server. The advantage of the server 
+# based approach is that it scales better to large projects and allows 
+# full text search. The disadvances is that it is more difficult to setup 
+# and does not have live searching capabilities.
+
+SERVER_BASED_SEARCH    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will 
+# generate Latex output.
+
+GENERATE_LATEX         = NO
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `latex' will be used as the default path.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be 
+# invoked. If left blank `latex' will be used as the default command name. 
+# Note that when enabling USE_PDFLATEX this option is only used for 
+# generating bitmaps for formulas in the HTML output, but not in the 
+# Makefile that is written to the output directory.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to 
+# generate index for LaTeX. If left blank `makeindex' will be used as the 
+# default command name.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact 
+# LaTeX documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_LATEX          = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used 
+# by the printer. Possible values are: a4, a4wide, letter, legal and 
+# executive. If left blank a4wide will be used.
+
+PAPER_TYPE             = a4wide
+
+# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX 
+# packages that should be included in the LaTeX output.
+
+EXTRA_PACKAGES         = 
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
+# the generated latex document. The header should contain everything until 
+# the first chapter. If it is left blank doxygen will generate a 
+# standard header. Notice: only use this tag if you know what you are doing!
+
+LATEX_HEADER           = 
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated 
+# is prepared for conversion to pdf (using ps2pdf). The pdf file will 
+# contain links (just like the HTML output) instead of page references 
+# This makes the output suitable for online browsing using a pdf viewer.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of 
+# plain latex in the generated Makefile. Set this option to YES to get a 
+# higher quality PDF documentation.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. 
+# command to the generated LaTeX files. This will instruct LaTeX to keep 
+# running if errors occur, instead of asking the user for help. 
+# This option is also used when generating formulas in HTML.
+
+LATEX_BATCHMODE        = NO
+
+# If LATEX_HIDE_INDICES is set to YES then doxygen will not 
+# include the index chapters (such as File Index, Compound Index, etc.) 
+# in the output.
+
+LATEX_HIDE_INDICES     = NO
+
+# If LATEX_SOURCE_CODE is set to YES then doxygen will include 
+# source code with syntax highlighting in the LaTeX output. 
+# Note that which sources are shown also depends on other settings 
+# such as SOURCE_BROWSER.
+
+LATEX_SOURCE_CODE      = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output 
+# The RTF output is optimized for Word 97 and may not look very pretty with 
+# other RTF readers or editors.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `rtf' will be used as the default path.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES Doxygen generates more compact 
+# RTF documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated 
+# will contain hyperlink fields. The RTF file will 
+# contain links (just like the HTML output) instead of page references. 
+# This makes the output suitable for online browsing using WORD or other 
+# programs which support those fields. 
+# Note: wordpad (write) and others do not support links.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's 
+# config file, i.e. a series of assignments. You only have to provide 
+# replacements, missing definitions are set to their default value.
+
+RTF_STYLESHEET_FILE    = 
+
+# Set optional variables used in the generation of an rtf document. 
+# Syntax is similar to doxygen's config file.
+
+RTF_EXTENSIONS_FILE    = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES (the default) Doxygen will 
+# generate man pages
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `man' will be used as the default path.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to 
+# the generated man pages (default is the subroutine's section .3)
+
+MAN_EXTENSION          = .3
+
+# If the MAN_LINKS tag is set to YES and Doxygen generates man output, 
+# then it will generate one additional man file for each entity 
+# documented in the real man page(s). These additional files 
+# only source the real man page, but without them the man command 
+# would be unable to find the correct page. The default is NO.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES Doxygen will 
+# generate an XML file that captures the structure of 
+# the code including all documentation.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `xml' will be used as the default path.
+
+XML_OUTPUT             = xml
+
+# The XML_SCHEMA tag can be used to specify an XML schema, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_SCHEMA             = 
+
+# The XML_DTD tag can be used to specify an XML DTD, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_DTD                = 
+
+# If the XML_PROGRAMLISTING tag is set to YES Doxygen will 
+# dump the program listings (including syntax highlighting 
+# and cross-referencing information) to the XML output. Note that 
+# enabling this will significantly increase the size of the XML output.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will 
+# generate an AutoGen Definitions (see autogen.sf.net) file 
+# that captures the structure of the code including all 
+# documentation. Note that this feature is still experimental 
+# and incomplete at the moment.
+
+GENERATE_AUTOGEN_DEF   = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_PERLMOD tag is set to YES Doxygen will 
+# generate a Perl module file that captures the structure of 
+# the code including all documentation. Note that this 
+# feature is still experimental and incomplete at the 
+# moment.
+
+GENERATE_PERLMOD       = NO
+
+# If the PERLMOD_LATEX tag is set to YES Doxygen will generate 
+# the necessary Makefile rules, Perl scripts and LaTeX code to be able 
+# to generate PDF and DVI output from the Perl module output.
+
+PERLMOD_LATEX          = NO
+
+# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be 
+# nicely formatted so it can be parsed by a human reader.  This is useful 
+# if you want to understand what is going on.  On the other hand, if this 
+# tag is set to NO the size of the Perl module output will be much smaller 
+# and Perl will parse it just the same.
+
+PERLMOD_PRETTY         = YES
+
+# The names of the make variables in the generated doxyrules.make file 
+# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. 
+# This is useful so different doxyrules.make files included by the same 
+# Makefile don't overwrite each other's variables.
+
+PERLMOD_MAKEVAR_PREFIX = 
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will 
+# evaluate all C-preprocessor directives found in the sources and include 
+# files.
+
+ENABLE_PREPROCESSING   = YES
+
+# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro 
+# names in the source code. If set to NO (the default) only conditional 
+# compilation will be performed. Macro expansion can be done in a controlled 
+# way by setting EXPAND_ONLY_PREDEF to YES.
+
+MACRO_EXPANSION        = NO
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
+# then the macro expansion is limited to the macros specified with the 
+# PREDEFINED and EXPAND_AS_DEFINED tags.
+
+EXPAND_ONLY_PREDEF     = NO
+
+# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
+# in the INCLUDE_PATH (see below) will be search if a #include is found.
+
+SEARCH_INCLUDES        = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that 
+# contain include files that are not input files but should be processed by 
+# the preprocessor.
+
+INCLUDE_PATH           = 
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard 
+# patterns (like *.h and *.hpp) to filter out the header-files in the 
+# directories. If left blank, the patterns specified with FILE_PATTERNS will 
+# be used.
+
+INCLUDE_FILE_PATTERNS  = 
+
+# The PREDEFINED tag can be used to specify one or more macro names that 
+# are defined before the preprocessor is started (similar to the -D option of 
+# gcc). The argument of the tag is a list of macros of the form: name 
+# or name=definition (no spaces). If the definition and the = are 
+# omitted =1 is assumed. To prevent a macro definition from being 
+# undefined via #undef or recursively expanded use the := operator 
+# instead of the = operator.
+
+PREDEFINED             = 
+
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
+# this tag can be used to specify a list of macro names that should be expanded. 
+# The macro definition that is found in the sources will be used. 
+# Use the PREDEFINED tag if you want to use a different macro definition.
+
+EXPAND_AS_DEFINED      = 
+
+# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then 
+# doxygen's preprocessor will remove all function-like macros that are alone 
+# on a line, have an all uppercase name, and do not end with a semicolon. Such 
+# function macros are typically used for boiler-plate code, and will confuse 
+# the parser if not removed.
+
+SKIP_FUNCTION_MACROS   = YES
+
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references
+#---------------------------------------------------------------------------
+
+# The TAGFILES option can be used to specify one or more tagfiles. 
+# Optionally an initial location of the external documentation 
+# can be added for each tagfile. The format of a tag file without 
+# this location is as follows: 
+#   TAGFILES = file1 file2 ... 
+# Adding location for the tag files is done as follows: 
+#   TAGFILES = file1=loc1 "file2 = loc2" ... 
+# where "loc1" and "loc2" can be relative or absolute paths or 
+# URLs. If a location is present for each tag, the installdox tool 
+# does not have to be run to correct the links. 
+# Note that each tag file must have a unique name 
+# (where the name does NOT include the path) 
+# If a tag file is not located in the directory in which doxygen 
+# is run, you must also specify the path to the tagfile here.
+
+TAGFILES               = 
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create 
+# a tag file that is based on the input files it reads.
+
+GENERATE_TAGFILE       = 
+
+# If the ALLEXTERNALS tag is set to YES all external classes will be listed 
+# in the class index. If set to NO only the inherited external classes 
+# will be listed.
+
+ALLEXTERNALS           = NO
+
+# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed 
+# in the modules index. If set to NO, only the current project's groups will 
+# be listed.
+
+EXTERNAL_GROUPS        = YES
+
+# The PERL_PATH should be the absolute path and name of the perl script 
+# interpreter (i.e. the result of `which perl').
+
+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool
+#---------------------------------------------------------------------------
+
+# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will 
+# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base 
+# or super classes. Setting the tag to NO turns the diagrams off. Note that 
+# this option is superseded by the HAVE_DOT option below. This is only a 
+# fallback. It is recommended to install and use dot, since it yields more 
+# powerful graphs.
+
+CLASS_DIAGRAMS         = YES
+
+# You can define message sequence charts within doxygen comments using the \msc 
+# command. Doxygen will then run the mscgen tool (see 
+# http://www.mcternan.me.uk/mscgen/) to produce the chart and insert it in the 
+# documentation. The MSCGEN_PATH tag allows you to specify the directory where 
+# the mscgen tool resides. If left empty the tool is assumed to be found in the 
+# default search path.
+
+MSCGEN_PATH            = 
+
+# If set to YES, the inheritance and collaboration graphs will hide 
+# inheritance and usage relations if the target is undocumented 
+# or is not a class.
+
+HIDE_UNDOC_RELATIONS   = YES
+
+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is 
+# available from the path. This tool is part of Graphviz, a graph visualization 
+# toolkit from AT&T and Lucent Bell Labs. The other options in this section 
+# have no effect if this option is set to NO (the default)
+
+HAVE_DOT               = NO
+
+# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is 
+# allowed to run in parallel. When set to 0 (the default) doxygen will 
+# base this on the number of processors available in the system. You can set it 
+# explicitly to a value larger than 0 to get control over the balance 
+# between CPU load and processing speed.
+
+DOT_NUM_THREADS        = 0
+
+# By default doxygen will write a font called FreeSans.ttf to the output 
+# directory and reference it in all dot files that doxygen generates. This 
+# font does not include all possible unicode characters however, so when you need 
+# these (or just want a differently looking font) you can specify the font name 
+# using DOT_FONTNAME. You need need to make sure dot is able to find the font, 
+# which can be done by putting it in a standard location or by setting the 
+# DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory 
+# containing the font.
+
+DOT_FONTNAME           = FreeSans.ttf
+
+# The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs. 
+# The default size is 10pt.
+
+DOT_FONTSIZE           = 10
+
+# By default doxygen will tell dot to use the output directory to look for the 
+# FreeSans.ttf font (which doxygen will put there itself). If you specify a 
+# different font using DOT_FONTNAME you can set the path where dot 
+# can find it using this tag.
+
+DOT_FONTPATH           = 
+
+# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect inheritance relations. Setting this tag to YES will force the 
+# the CLASS_DIAGRAMS tag to NO.
+
+CLASS_GRAPH            = YES
+
+# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect implementation dependencies (inheritance, containment, and 
+# class references variables) of the class with other documented classes.
+
+COLLABORATION_GRAPH    = YES
+
+# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for groups, showing the direct groups dependencies
+
+GROUP_GRAPHS           = YES
+
+# If the UML_LOOK tag is set to YES doxygen will generate inheritance and 
+# collaboration diagrams in a style similar to the OMG's Unified Modeling 
+# Language.
+
+UML_LOOK               = NO
+
+# If set to YES, the inheritance and collaboration graphs will show the 
+# relations between templates and their instances.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT 
+# tags are set to YES then doxygen will generate a graph for each documented 
+# file showing the direct and indirect include dependencies of the file with 
+# other documented files.
+
+INCLUDE_GRAPH          = YES
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and 
+# HAVE_DOT tags are set to YES then doxygen will generate a graph for each 
+# documented header file showing the documented files that directly or 
+# indirectly include this file.
+
+INCLUDED_BY_GRAPH      = YES
+
+# If the CALL_GRAPH and HAVE_DOT options are set to YES then 
+# doxygen will generate a call dependency graph for every global function 
+# or class method. Note that enabling this option will significantly increase 
+# the time of a run. So in most cases it will be better to enable call graphs 
+# for selected functions only using the \callgraph command.
+
+CALL_GRAPH             = NO
+
+# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then 
+# doxygen will generate a caller dependency graph for every global function 
+# or class method. Note that enabling this option will significantly increase 
+# the time of a run. So in most cases it will be better to enable caller 
+# graphs for selected functions only using the \callergraph command.
+
+CALLER_GRAPH           = NO
+
+# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
+# will graphical hierarchy of all classes instead of a textual one.
+
+GRAPHICAL_HIERARCHY    = YES
+
+# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES 
+# then doxygen will show the dependencies a directory has on other directories 
+# in a graphical way. The dependency relations are determined by the #include 
+# relations between the files in the directories.
+
+DIRECTORY_GRAPH        = YES
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images 
+# generated by dot. Possible values are png, jpg, or gif 
+# If left blank png will be used.
+
+DOT_IMAGE_FORMAT       = png
+
+# The tag DOT_PATH can be used to specify the path where the dot tool can be 
+# found. If left blank, it is assumed the dot tool can be found in the path.
+
+DOT_PATH               = 
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that 
+# contain dot files that are included in the documentation (see the 
+# \dotfile command).
+
+DOTFILE_DIRS           = 
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of 
+# nodes that will be shown in the graph. If the number of nodes in a graph 
+# becomes larger than this value, doxygen will truncate the graph, which is 
+# visualized by representing a node as a red box. Note that doxygen if the 
+# number of direct children of the root node in a graph is already larger than 
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note 
+# that the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+
+DOT_GRAPH_MAX_NODES    = 50
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the 
+# graphs generated by dot. A depth value of 3 means that only nodes reachable 
+# from the root by following a path via at most 3 edges will be shown. Nodes 
+# that lay further from the root node will be omitted. Note that setting this 
+# option to 1 or 2 may greatly reduce the computation time needed for large 
+# code bases. Also note that the size of a graph can be further restricted by 
+# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent 
+# background. This is disabled by default, because dot on Windows does not 
+# seem to support this out of the box. Warning: Depending on the platform used, 
+# enabling this option may lead to badly anti-aliased labels on the edges of 
+# a graph (i.e. they become hard to read).
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output 
+# files in one run (i.e. multiple -o and -T options on the command line). This 
+# makes dot run faster, but since only newer versions of dot (>1.8.10) 
+# support this, this feature is disabled by default.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will 
+# generate a legend page explaining the meaning of the various boxes and 
+# arrows in the dot generated graphs.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will 
+# remove the intermediate dot files that are used to generate 
+# the various graphs.
+
+DOT_CLEANUP            = YES
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..7d1c323
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,365 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+   Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package.  The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package.  Some packages provide this
+`INSTALL' file but do not implement all of the features documented
+below.  The lack of an optional feature in a given package is not
+necessarily a bug.  More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+   It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring.  Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'.  You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+   The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.
+
+     Running `configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package, generally using the just-built uninstalled binaries.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.  When installing into a prefix owned by root, it is
+     recommended that the package be configured and built as a regular
+     user, and only the `make install' phase executed with root
+     privileges.
+
+  5. Optionally, type `make installcheck' to repeat any self-tests, but
+     this time using the binaries in their final installed location.
+     This target does not install anything.  Running this target as a
+     regular user, particularly if the prior `make install' required
+     root privileges, verifies that the installation completed
+     correctly.
+
+  6. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+  7. Often, you can also type `make uninstall' to remove the installed
+     files again.  In practice, not all packages have tested that
+     uninstallation works correctly, even though it is required by the
+     GNU Coding Standards.
+
+  8. Some packages, particularly those that use Automake, provide `make
+     distcheck', which can by used by developers to test that all other
+     targets like `make install' and `make uninstall' work correctly.
+     This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the `configure' script does not know about.  Run `./configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here
+is an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.  This
+is known as a "VPATH" build.
+
+   With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+   On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple `-arch' options to the
+compiler but only a single `-arch' option to the preprocessor.  Like
+this:
+
+     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CPP="gcc -E" CXXCPP="g++ -E"
+
+   This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the `lipo' tool if you have problems.
+
+Installation Names
+==================
+
+   By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc.  You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.  In general, the
+default for these options is expressed in terms of `${prefix}', so that
+specifying just `--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+   The most portable way to affect installation locations is to pass the
+correct locations to `configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+`make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+   The first method involves providing an override variable for each
+affected directory.  For example, `make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+`${prefix}'.  Any directories that were specified during `configure',
+but not in terms of `${prefix}', must each be overridden at install
+time for the entire installation to be relocated.  The approach of
+makefile variable overrides for each directory variable is required by
+the GNU Coding Standards, and ideally causes no recompilation.
+However, some platforms have known limitations with the semantics of
+shared libraries that end up requiring recompilation when using this
+method, particularly noticeable in packages that use GNU Libtool.
+
+   The second method involves providing the `DESTDIR' variable.  For
+example, `make install DESTDIR=/alternate/directory' will prepend
+`/alternate/directory' before all installation names.  The approach of
+`DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters.  On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of `${prefix}'
+at `configure' time.
+
+Optional Features
+=================
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+   Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+   Some packages offer the ability to configure how verbose the
+execution of `make' will be.  For these packages, running `./configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with `make V=1'; while running `./configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with `make V=0'.
+
+Particular systems
+==================
+
+   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
+CC is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
+a workaround.  If GNU CC is not installed, it is therefore recommended
+to try
+
+     ./configure CC="cc"
+
+and if that doesn't work, try
+
+     ./configure CC="cc -nodtk"
+
+   On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
+directory contains several dysfunctional programs; working variants of
+these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
+in your `PATH', put it _after_ `/usr/bin'.
+
+   On Haiku, software installed for all users goes in `/boot/common',
+not `/usr/local'.  It is recommended to use the following options:
+
+     ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+   There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS
+     KERNEL-OS
+
+   See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to `configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug.  Until the bug is fixed you can use this workaround:
+
+     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+   `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+     Print a summary of all of the options to `configure', and exit.
+
+`--help=short'
+`--help=recursive'
+     Print a summary of the options unique to this package's
+     `configure', and exit.  The `short' variant lists options used
+     only in the top level, while the `recursive' variant lists options
+     also present in any nested packages.
+
+`--version'
+`-V'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally `config.cache'.  FILE defaults to `/dev/null' to
+     disable caching.
+
+`--config-cache'
+`-C'
+     Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`--prefix=DIR'
+     Use DIR as the installation prefix.  *note Installation Names::
+     for more details, including other options available for fine-tuning
+     the installation locations.
+
+`--no-create'
+`-n'
+     Run the configure checks, but stop before creating any output
+     files.
+
+`configure' also accepts some other, not widely useful, options.  Run
+`configure --help' for more details.
+
diff --git a/KNOWN_ISSUES b/KNOWN_ISSUES
new file mode 100644
index 0000000..85bb088
--- /dev/null
+++ b/KNOWN_ISSUES
@@ -0,0 +1,25 @@
+Features not supported
+======================
+
+Here is a list of the most notable features that are not supported in the 
+current version of Knot.
+
+* IXFR
+* Dynamic updates
+* TSIG
+* Slave functionality (AXFR-in).
+* RRSet rotation
+* Root zone (Knot cannot serve the root zone)
+* Other DNS classes than IN (CH, CS, HS)
+* Unknown RR types (types in form TYPE1234)
+
+
+Known bugs
+==========
+
+* Certain malformed packets cause the server to crash.
+* Some actions may not be fully thread-safe (e.g. removing expired zone).
+* If some hashed domain name (NSEC3) contains other data than NSEC3 and RRSIG,
+  queries for this data will not be responded well (always answers NXDOMAIN).
+* Server fails to quit properly on some systems.
+
diff --git a/Knot.config b/Knot.config
new file mode 100644
index 0000000..8cec188
--- /dev/null
+++ b/Knot.config
@@ -0,0 +1 @@
+// ADD PREDEFINED MACROS HERE!
diff --git a/Knot.creator b/Knot.creator
new file mode 100644
index 0000000..e94cbbd
--- /dev/null
+++ b/Knot.creator
@@ -0,0 +1 @@
+[General]
diff --git a/Knot.files b/Knot.files
new file mode 100644
index 0000000..06fff5e
--- /dev/null
+++ b/Knot.files
@@ -0,0 +1,253 @@
+CodingStyle
+Makefile.am
+Doxy.page.h
+Doxyfile
+Doxyfile.devel
+configure.ac
+KNOWN_ISSUES
+README
+tests/querytcp.c
+libknot/Makefile.am
+libknot/libknot.h
+libknot/common.h
+libknot/dname.h
+libknot/dname.c
+libknot/rrset.h
+libknot/rrset.c
+libknot/rdata.h
+libknot/rdata.c
+libknot/edns.h
+libknot/edns.c
+libknot/nsec3.h
+libknot/nsec3.c
+libknot/consts.h
+libknot/hash/cuckoo-hash-table.c
+libknot/hash/cuckoo-hash-table.h
+libknot/hash/hash-functions.c
+libknot/hash/hash-functions.h
+libknot/hash/universal-system.c
+libknot/hash/universal-system.h
+libknot/nameserver/name-server.c
+libknot/nameserver/name-server.h
+libknot/packet/packet.h
+libknot/packet/packet.c
+libknot/packet/query.h
+libknot/packet/query.c
+libknot/packet/response.h
+libknot/packet/response.c
+libknot/updates/changesets.h
+libknot/updates/changesets.c
+libknot/updates/ddns.h
+libknot/updates/ddns.c
+libknot/updates/xfr-in.h
+libknot/updates/xfr-in.c
+libknot/util/wire.h
+libknot/util/debug.h
+libknot/util/debug.c
+libknot/util/tolower.h
+libknot/util/tolower.c
+libknot/util/utils.h
+libknot/util/utils.c
+libknot/util/descriptor.h
+libknot/util/descriptor.c
+libknot/util/error.c
+libknot/util/error.h
+libknot/zone/zonedb.h
+libknot/zone/zonedb.c
+libknot/zone/node.h
+libknot/zone/node.c
+libknot/zone/zone.h
+libknot/zone/zone.c
+libknot/zone/zone-contents.c
+libknot/zone/zone-contents.h
+libknot/zone/zone-tree.h
+libknot/zone/zone-tree.c
+libknot/zone/dname-table.h
+libknot/zone/dname-table.c
+src/Makefile.am
+src/common/slab/malloc.c
+src/common/slab/malloc.h
+src/common/slab/slab.c
+src/common/slab/slab.h
+src/common/slab/alloc-common.h
+src/common/libtap/tap.c
+src/common/libtap/tap.h
+src/common/libtap/tap_unit.h
+src/common/lists.h
+src/common/lists.c
+src/common/base32.h
+src/common/base32.c
+src/common/print.c
+src/common/print.h
+src/common/latency.c
+src/common/latency.h
+src/common/dynamic-array.c
+src/common/dynamic-array.h
+src/common/skip-list.c
+src/common/skip-list.h
+src/common/tree.h
+src/common/base32hex.h
+src/common/base32hex.c
+src/common/evqueue.c
+src/common/evqueue.h
+src/common/evsched.c
+src/common/evsched.h
+src/common/errors.h
+src/common/errors.c
+src/common/acl.c
+src/common/acl.h
+src/common/sockaddr.h
+src/common/sockaddr.c
+src/common/crc.c
+src/common/crc.h
+src/common/ref.c
+src/common/ref.h
+src/common/modified_tree.h
+src/common/general-tree.h
+src/common/general-tree.c
+src/common/WELL1024a.c
+src/common/WELL1024a.h
+src/common/fdset.h
+src/common/fdset.c
+src/common/fdset_poll.h
+src/common/fdset_poll.c
+src/common/fdset_epoll.h
+src/common/fdset_epoll.c
+src/common/fdset_kqueue.h
+src/common/fdset_kqueue.c
+src/zcompile/parser-descriptor.h
+src/zcompile/parser-descriptor.c
+src/zcompile/parser-util.h
+src/zcompile/parser-util.c
+src/zcompile/zcompile.c
+src/zcompile/zcompile.h
+src/zcompile/zparser.y
+src/zcompile/zlexer.l
+src/zcompile/zcompile-error.h
+src/zcompile/zcompile_main.c
+src/knot/common.h
+src/knot/main.c
+src/knot/ctl/knotc_main.c
+src/knot/ctl/process.c
+src/knot/ctl/process.h
+src/knot/other/debug.h
+src/knot/other/log.c
+src/knot/other/log.h
+src/knot/other/error.c
+src/knot/other/error.h
+src/knot/stat/gatherer.c
+src/knot/stat/gatherer.h
+src/knot/stat/stat.h
+src/knot/stat/stat.c
+src/knot/stat/stat-common.h
+src/knot/server/dthreads.c
+src/knot/server/dthreads.h
+src/knot/server/server.c
+src/knot/server/server.h
+src/knot/server/socket.c
+src/knot/server/socket.h
+src/knot/server/tcp-handler.c
+src/knot/server/tcp-handler.h
+src/knot/server/xfr-handler.c
+src/knot/server/xfr-handler.h
+src/knot/server/udp-handler.c
+src/knot/server/udp-handler.h
+src/knot/server/zones.c
+src/knot/server/zones.h
+src/knot/server/journal.c
+src/knot/server/journal.h
+src/knot/server/notify.c
+src/knot/server/notify.h
+src/knot/ctl/process.c
+src/knot/ctl/process.h
+src/knot/conf/cf-lex.l
+src/knot/conf/cf-parse.y
+src/knot/conf/conf.c
+src/knot/conf/conf.h
+src/knot/conf/logconf.c
+src/knot/conf/logconf.h
+src/knot/zone/zone-dump.c
+src/knot/zone/zone-dump.h
+src/knot/zone/zone-load.c
+src/knot/zone/zone-load.h
+src/knot/zone/zone-dump-text.h
+src/knot/zone/zone-dump-text.c
+src/zcompile/tests/unittests_zp_main.c
+src/zcompile/tests/zcompile_tests.c
+src/zcompile/zcompile-error.c
+src/tests/unittests_main.c
+src/tests/common/acl_tests.c
+src/tests/common/acl_tests.h
+src/tests/common/da_tests.c
+src/tests/common/da_tests.h
+src/tests/common/events_tests.c
+src/tests/common/events_tests.h
+src/tests/common/skiplist_tests.c
+src/tests/common/skiplist_tests.h
+src/tests/common/slab_tests.c
+src/tests/common/slab_tests.h
+src/tests/common/fdset_tests.c
+src/tests/common/fdset_tests.h
+src/tests/knot/dthreads_tests.c
+src/tests/knot/dthreads_tests.h
+src/tests/knot/conf_tests.c
+src/tests/knot/conf_tests.h
+src/tests/knot/journal_tests.c
+src/tests/knot/journal_tests.h
+src/tests/knot/server_tests.c
+src/tests/knot/server_tests.h
+src/tests/libknot/unittests_libknot.c
+src/tests/libknot/libknot/dname_tests.c
+src/tests/libknot/libknot/dname_tests.h
+src/tests/libknot/libknot/edns_tests.c
+src/tests/libknot/libknot/edns_tests.h
+src/tests/libknot/libknot/node_tests.c
+src/tests/libknot/libknot/node_tests.h
+src/tests/libknot/libknot/rdata_tests.c
+src/tests/libknot/libknot/rdata_tests.h
+src/tests/libknot/libknot/response_tests.c
+src/tests/libknot/libknot/response_tests.h
+src/tests/libknot/libknot/rrset_tests.c
+src/tests/libknot/libknot/rrset_tests.h
+src/tests/libknot/libknot/zone_tests.c
+src/tests/libknot/libknot/zone_tests.h
+src/tests/libknot/libknot/zonedb_tests.c
+src/tests/libknot/libknot/zonedb_tests.h
+src/tests/libknot/libknot/cuckoo_tests.c
+src/tests/libknot/libknot/cuckoo_tests.h
+src/tests/libknot/libknot/dname_table_tests.h
+src/tests/libknot/libknot/dname_table_tests.c
+src/tests/libknot/libknot/packet_tests.c
+src/tests/libknot/libknot/packet_tests.h
+src/tests/libknot/libknot/query_tests.c
+src/tests/libknot/libknot/query_tests.h
+src/tests/libknot/libknot/nsec3_tests.c
+src/tests/libknot/libknot/nsec3_tests.h
+src/tests/libknot/realdata/unittests_libknot_realdata.c
+src/tests/libknot/realdata/libknot/packet_tests_realdata.c
+src/tests/libknot/realdata/libknot/packet_tests_realdata.h
+src/tests/libknot/realdata/libknot/dname_tests_realdata.c
+src/tests/libknot/realdata/libknot/dname_tests_realdata.h
+src/tests/libknot/realdata/libknot/edns_tests_realdata.c
+src/tests/libknot/realdata/libknot/edns_tests_realdata.h
+src/tests/libknot/realdata/libknot/node_tests_realdata.c
+src/tests/libknot/realdata/libknot/node_tests_realdata.h
+src/tests/libknot/realdata/libknot/rdata_tests_realdata.c
+src/tests/libknot/realdata/libknot/rdata_tests_realdata.h
+src/tests/libknot/realdata/libknot/response_tests_realdata.c
+src/tests/libknot/realdata/libknot/response_tests_realdata.h
+src/tests/libknot/realdata/libknot/rrset_tests_realdata.c
+src/tests/libknot/realdata/libknot/rrset_tests_realdata.h
+src/tests/libknot/realdata/libknot/zone_tests_realdata.c
+src/tests/libknot/realdata/libknot/zone_tests_realdata.h
+src/tests/libknot/realdata/libknot/zonedb_tests_realdata.c
+src/tests/libknot/realdata/libknot/zonedb_tests_realdata.h
+src/tests/libknot/realdata/libknot_tests_loader_realdata.c
+src/tests/libknot/realdata/libknot_tests_loader_realdata.h
+src/tests/libknot/libknot/zone_tree_tests.c
+src/tests/libknot/libknot/zone_tree_tests.h
+samples/Makefile.am
+libknot/tsig.h
+libknot/tsig.c
+libknot/tsig-op.c
+libknot/tsig-op.h
diff --git a/Knot.includes b/Knot.includes
new file mode 100644
index 0000000..8184956
--- /dev/null
+++ b/Knot.includes
@@ -0,0 +1,13 @@
+obj
+src/alloc
+src/ctl
+src/dnslib
+src/hash
+src/lib
+src/other
+src/server
+src/stat
+src/tests/libtap
+src/tests
+src/zoneparser
+src
\ No newline at end of file
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..30ea215
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,2 @@
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diff --git a/Makefile.in b/Makefile.in
new file mode 100644
index 0000000..e52ea78
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,708 @@
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+
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+# This Makefile.in is free software; the Free Software Foundation
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+	$(am__cd) $(top_srcdir) && \
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+	  *config.status*) \
+	    echo ' $(SHELL) ./config.status'; \
+	    $(SHELL) ./config.status;; \
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+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
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+# This directory's subdirectories are mostly independent; you can cd
+# into them and run `make' without going through this Makefile.
+# To change the values of `make' variables: instead of editing Makefiles,
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+#     (which will cause the Makefiles to be regenerated when you run `make');
+# (2) otherwise, pass the desired values on the `make' command line.
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+	for f in x $$MAKEFLAGS; do \
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+	for f in x $$MAKEFLAGS; do \
+	  case $$f in \
+	    *=* | --[!k]*);; \
+	    *k*) failcom='fail=yes';; \
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+	done; \
+	dot_seen=no; \
+	case "$@" in \
+	  distclean-* | maintainer-clean-*) list='$(DIST_SUBDIRS)' ;; \
+	  *) list='$(SUBDIRS)' ;; \
+	esac; \
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+	  if test "$$subdir" = "."; then :; else \
+	    rev="$$subdir $$rev"; \
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+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
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+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
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+		$(TAGS_FILES) $(LISP)
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+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	$(am__remove_distdir)
+	test -d "$(distdir)" || mkdir "$(distdir)"
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test -d "$(distdir)/$$subdir" \
+	    || $(MKDIR_P) "$(distdir)/$$subdir" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
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+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$new_top_distdir" \
+	        distdir="$$new_distdir" \
+		am__remove_distdir=: \
+		am__skip_length_check=: \
+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+	-test -n "$(am__skip_mode_fix)" \
+	|| find "$(distdir)" -type d ! -perm -755 \
+		-exec chmod u+rwx,go+rx {} \; -o \
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+	  ! -type d ! -perm -400 -exec chmod a+r {} \; -o \
+	  ! -type d ! -perm -444 -exec $(install_sh) -c -m a+r {} {} \; \
+	|| chmod -R a+r "$(distdir)"
+dist-gzip: distdir
+	tardir=$(distdir) && $(am__tar) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).tar.gz
+	$(am__remove_distdir)
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+	tardir=$(distdir) && $(am__tar) | lzma -9 -c >$(distdir).tar.lzma
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+	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
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+	$(am__remove_distdir)
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+dist-zip: distdir
+	-rm -f $(distdir).zip
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+	$(am__remove_distdir)
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+dist dist-all: distdir
+	tardir=$(distdir) && $(am__tar) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).tar.gz
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+# This target untars the dist file and tries a VPATH configuration.  Then
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+# tarfile.
+distcheck: dist
+	case '$(DIST_ARCHIVES)' in \
+	*.tar.gz*) \
+	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).tar.gz | $(am__untar) ;;\
+	*.tar.bz2*) \
+	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
+	*.tar.lzma*) \
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+	*.tar.xz*) \
+	  xz -dc $(distdir).tar.xz | $(am__untar) ;;\
+	*.tar.Z*) \
+	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
+	*.shar.gz*) \
+	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).shar.gz | unshar ;;\
+	*.zip*) \
+	  unzip $(distdir).zip ;;\
+	esac
+	chmod -R a-w $(distdir); chmod a+w $(distdir)
+	mkdir $(distdir)/_build
+	mkdir $(distdir)/_inst
+	chmod a-w $(distdir)
+	test -d $(distdir)/_build || exit 0; \
+	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
+	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
+	  && am__cwd=`pwd` \
+	  && $(am__cd) $(distdir)/_build \
+	  && ../configure --srcdir=.. --prefix="$$dc_install_base" \
+	    $(DISTCHECK_CONFIGURE_FLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) \
+	  && $(MAKE) $(AM_MAKEFLAGS) dvi \
+	  && $(MAKE) $(AM_MAKEFLAGS) check \
+	  && $(MAKE) $(AM_MAKEFLAGS) install \
+	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
+	  && $(MAKE) $(AM_MAKEFLAGS) uninstall \
+	  && $(MAKE) $(AM_MAKEFLAGS) distuninstallcheck_dir="$$dc_install_base" \
+	        distuninstallcheck \
+	  && chmod -R a-w "$$dc_install_base" \
+	  && ({ \
+	       (cd ../.. && umask 077 && mkdir "$$dc_destdir") \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" install \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" uninstall \
+	       && $(MAKE) $(AM_MAKEFLAGS) DESTDIR="$$dc_destdir" \
+	            distuninstallcheck_dir="$$dc_destdir" distuninstallcheck; \
+	      } || { rm -rf "$$dc_destdir"; exit 1; }) \
+	  && rm -rf "$$dc_destdir" \
+	  && $(MAKE) $(AM_MAKEFLAGS) dist \
+	  && rm -rf $(DIST_ARCHIVES) \
+	  && $(MAKE) $(AM_MAKEFLAGS) distcleancheck \
+	  && cd "$$am__cwd" \
+	  || exit 1
+	$(am__remove_distdir)
+	@(echo "$(distdir) archives ready for distribution: "; \
+	  list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \
+	  sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x'
+distuninstallcheck:
+	@$(am__cd) '$(distuninstallcheck_dir)' \
+	&& test `$(distuninstallcheck_listfiles) | wc -l` -le 1 \
+	   || { echo "ERROR: files left after uninstall:" ; \
+	        if test -n "$(DESTDIR)"; then \
+	          echo "  (check DESTDIR support)"; \
+	        fi ; \
+	        $(distuninstallcheck_listfiles) ; \
+	        exit 1; } >&2
+distcleancheck: distclean
+	@if test '$(srcdir)' = . ; then \
+	  echo "ERROR: distcleancheck can only run from a VPATH build" ; \
+	  exit 1 ; \
+	fi
+	@test `$(distcleancheck_listfiles) | wc -l` -eq 0 \
+	  || { echo "ERROR: files left in build directory after distclean:" ; \
+	       $(distcleancheck_listfiles) ; \
+	       exit 1; } >&2
+check-am: all-am
+check: check-recursive
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+install-am: all-am
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+
+installcheck: installcheck-recursive
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
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+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-recursive
+	-rm -f $(am__CONFIG_DISTCLEAN_FILES)
+	-rm -f Makefile
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+install-ps-am:
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+installcheck-am:
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+maintainer-clean: maintainer-clean-recursive
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+# Otherwise a system limit (for SysV at least) may be exceeded.
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diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 0000000..1496a5e
--- /dev/null
+++ b/README
@@ -0,0 +1,142 @@
+Installation
+============
+
+The following steps should work (verified in VirtualBox only)
+on the distribution/architecture/release combinations as listed bellow.
+
+----------------------------------------------
+Debian         (AMD64, I386) 6.0.2.1 (squeeze)
+Ubuntu Server  (AMD64, I386) 10.04 LTS
+Ubuntu Desktop (AMD64, I386) 10.04 LTS
+----------------------------------------------
+
+$ # make the system up-to-date
+$
+$ sudo apt-get update
+$ sudo apt-get upgrade
+$
+$ # ensure all prerequisites are installed
+$
+$ sudo apt-get install git-core autoconf libtool flex bison libssl-dev
+$
+$ # the required version of liburcu is not available in the default package sources.
+$
+$ wget http://bd.archive.ubuntu.com/ubuntu/pool/universe/libu/liburcu/liburcu0_0.5.4-1_amd64.deb
+$ wget http://bd.archive.ubuntu.com/ubuntu/pool/universe/libu/liburcu/liburcu-dev_0.5.4-1_amd64.deb
+$ sudo dpkg -i liburcu0_0.5.4-1_amd64.deb
+$ sudo dpkg -i liburcu-dev_0.5.4-1_amd64.deb
+$
+$ # go for the real thing
+$
+$ git clone git://git.nic.cz/knot
+$ cd knot
+$ autoreconf -if
+$ ./configure
+$ make
+$ sudo make install
+$ sudo ldconfig
+
+Alternative packages for I386:
+
+$ # the required version of liburcu is not available in the default package sources.
+$
+$ wget http://bd.archive.ubuntu.com/ubuntu/pool/universe/libu/liburcu/liburcu0_0.5.4-1_i386.deb
+$ wget http://bd.archive.ubuntu.com/ubuntu/pool/universe/libu/liburcu/liburcu-dev_0.5.4-1_i386.deb
+$ sudo dpkg -i liburcu0_0.5.4-1_i386.deb
+$ sudo dpkg -i liburcu-dev_0.5.4-1_i386.deb
+
+Installation on BSD
+===================
+
+Not all prerequisites are available as ports on BSD.
+
+- liburcu must be compiled from sources
+  - version 0.6.4 compiles on BSD without any source code modifications
+  - in case of x86_64 build, CFLAGS nad build type has to be set appropriately.
+    $ CFLAGS=-fPIC ./configure --build amd64
+- flex must be newer version from ports that support reentrant parsers
+
+Knot DNS requires more recent version of flex from ports, to prevent name clash, specify flex destination.
+$ cd <knot sources>
+$ autoreconf -if
+$ ./configure
+$ make && sudo make install
+
+Installation on OS X
+====================
+
+Not all prerequisites are preinstalled for OS X.
+
+- liburcu must be compiled from sources
+  - liburcu requires gcc-4.6 from MacPorts, as it depends on __thread keyword
+  $ CC=gcc-mp-4.6 ARCH=x86_64 ./configure
+  $ make && sudo make install
+
+Compiling Knot DNS with gcc-mp-4.6 is recommended, but not necessary. 
+
+Running
+=======
+
+First, each server needs configuration file. Please see samples/knot.sample.conf
+for reference. Minimal configuration can be found in samples/knot.min.conf
+Configuration zone has to specify:
+* storage for PID files, compiled zones etc.
+* network interfaces
+* served zones
+
+$ cp samples/knot.min.conf myserver.conf
+$ vim myserver.conf # or your favourite text editor
+
+Second, zone files have to be compiled to binary form in order for server to
+load them. Binary 'knotc' (controller) offers functionality for everything from zone file
+management to controlling server instance. Most important parameter is '-c' that
+specifies config file for our server. Compiled zones are saved to storage
+defined in 'storage' variable in configuration.
+
+$ knotc -h # see what it can do
+$ knotc -c myserver.conf compile # compile zone files to binary format
+
+Third, lets load server. You can do this by running 'knotd' directly, or with
+'knotc' as well. Server is able to run in daemonized or interactive mode.
+Lets start our server in interactive mode (parameter '-i') to see if it runs.
+
+$ knotc -c myserver.conf -i start # start server in interactive mode
+
+Running as daemon
+=================
+
+Controller runs server in daemonized mode as default. Disadvantage is, that
+it closes stdout/stderr so you need to set up either syslog or logging to
+own files in the configuration. Controller parameter '-w' waits for the operation
+to finish. Let's test server functionality.
+
+$ knotc -c myserver.conf -w start # start server
+$ dig @$ADDR -p $PORT example.com # issue a query and see result
+$ ...
+$ knotc -c myserver.conf -w stop  # stop server
+
+Also, keep in mind that zone files have to be compiled before they are loaded
+to server. Workflow is as follows:
+
+$ knotc -c myserver.conf -w start
+$ <edit zonefile>
+$ knotc -c myserver.conf compile  # compile zones to binary format
+$ knotc -c myserver.conf reload   # reconfigures server on-the-fly
+$ dig @$ADDR -p $PORT example.com # issue a query and see result
+$ ...
+$ knotc -c myserver.conf stop
+
+Supported features
+==================
+
+DNS functions:
+* AXFR (master)
+* EDNS0
+* DNSSEC
+* NSEC3
+
+Server features:
+* Adding/removing zones on-the-fly
+* Reconfiguring server instance on-the-fly
+* IPv6 support
+* Semantic checks of loaded zone
diff --git a/aclocal.m4 b/aclocal.m4
new file mode 100644
index 0000000..2b546eb
--- /dev/null
+++ b/aclocal.m4
@@ -0,0 +1,1020 @@
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+# serial 16
+
+# This macro actually does too much.  Some checks are only needed if
+# your package does certain things.  But this isn't really a big deal.
+
+# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
+# AM_INIT_AUTOMAKE([OPTIONS])
+# -----------------------------------------------
+# The call with PACKAGE and VERSION arguments is the old style
+# call (pre autoconf-2.50), which is being phased out.  PACKAGE
+# and VERSION should now be passed to AC_INIT and removed from
+# the call to AM_INIT_AUTOMAKE.
+# We support both call styles for the transition.  After
+# the next Automake release, Autoconf can make the AC_INIT
+# arguments mandatory, and then we can depend on a new Autoconf
+# release and drop the old call support.
+AC_DEFUN([AM_INIT_AUTOMAKE],
+[AC_PREREQ([2.62])dnl
+dnl Autoconf wants to disallow AM_ names.  We explicitly allow
+dnl the ones we care about.
+m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
+AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
+AC_REQUIRE([AC_PROG_INSTALL])dnl
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+AC_SUBST([CYGPATH_W])
+
+# Define the identity of the package.
+dnl Distinguish between old-style and new-style calls.
+m4_ifval([$2],
+[m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
+ AC_SUBST([PACKAGE], [$1])dnl
+ AC_SUBST([VERSION], [$2])],
+[_AM_SET_OPTIONS([$1])dnl
+dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
+m4_if(m4_ifdef([AC_PACKAGE_NAME], 1)m4_ifdef([AC_PACKAGE_VERSION], 1), 11,,
+  [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
+ AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
+ AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
+
+_AM_IF_OPTION([no-define],,
+[AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
+ AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package])])dnl
+
+# Some tools Automake needs.
+AC_REQUIRE([AM_SANITY_CHECK])dnl
+AC_REQUIRE([AC_ARG_PROGRAM])dnl
+AM_MISSING_PROG(ACLOCAL, aclocal-${am__api_version})
+AM_MISSING_PROG(AUTOCONF, autoconf)
+AM_MISSING_PROG(AUTOMAKE, automake-${am__api_version})
+AM_MISSING_PROG(AUTOHEADER, autoheader)
+AM_MISSING_PROG(MAKEINFO, makeinfo)
+AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
+AC_REQUIRE([AM_PROG_MKDIR_P])dnl
+# We need awk for the "check" target.  The system "awk" is bad on
+# some platforms.
+AC_REQUIRE([AC_PROG_AWK])dnl
+AC_REQUIRE([AC_PROG_MAKE_SET])dnl
+AC_REQUIRE([AM_SET_LEADING_DOT])dnl
+_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
+	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
+			     [_AM_PROG_TAR([v7])])])
+_AM_IF_OPTION([no-dependencies],,
+[AC_PROVIDE_IFELSE([AC_PROG_CC],
+		  [_AM_DEPENDENCIES(CC)],
+		  [define([AC_PROG_CC],
+			  defn([AC_PROG_CC])[_AM_DEPENDENCIES(CC)])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_CXX],
+		  [_AM_DEPENDENCIES(CXX)],
+		  [define([AC_PROG_CXX],
+			  defn([AC_PROG_CXX])[_AM_DEPENDENCIES(CXX)])])dnl
+AC_PROVIDE_IFELSE([AC_PROG_OBJC],
+		  [_AM_DEPENDENCIES(OBJC)],
+		  [define([AC_PROG_OBJC],
+			  defn([AC_PROG_OBJC])[_AM_DEPENDENCIES(OBJC)])])dnl
+])
+_AM_IF_OPTION([silent-rules], [AC_REQUIRE([AM_SILENT_RULES])])dnl
+dnl The `parallel-tests' driver may need to know about EXEEXT, so add the
+dnl `am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This macro
+dnl is hooked onto _AC_COMPILER_EXEEXT early, see below.
+AC_CONFIG_COMMANDS_PRE(dnl
+[m4_provide_if([_AM_COMPILER_EXEEXT],
+  [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
+])
+
+dnl Hook into `_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
+dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
+dnl mangled by Autoconf and run in a shell conditional statement.
+m4_define([_AC_COMPILER_EXEEXT],
+m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
+
+
+# When config.status generates a header, we must update the stamp-h file.
+# This file resides in the same directory as the config header
+# that is generated.  The stamp files are numbered to have different names.
+
+# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
+# loop where config.status creates the headers, so we can generate
+# our stamp files there.
+AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
+[# Compute $1's index in $config_headers.
+_am_arg=$1
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
+
+# Copyright (C) 2001, 2003, 2005, 2008  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_SH
+# ------------------
+# Define $install_sh.
+AC_DEFUN([AM_PROG_INSTALL_SH],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+if test x"${install_sh}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+AC_SUBST(install_sh)])
+
+# Copyright (C) 2003, 2005  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 2
+
+# Check whether the underlying file-system supports filenames
+# with a leading dot.  For instance MS-DOS doesn't.
+AC_DEFUN([AM_SET_LEADING_DOT],
+[rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+AC_SUBST([am__leading_dot])])
+
+# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 5
+
+# AM_PROG_LEX
+# -----------
+# Autoconf leaves LEX=: if lex or flex can't be found.  Change that to a
+# "missing" invocation, for better error output.
+AC_DEFUN([AM_PROG_LEX],
+[AC_PREREQ(2.50)dnl
+AC_REQUIRE([AM_MISSING_HAS_RUN])dnl
+AC_REQUIRE([AC_PROG_LEX])dnl
+if test "$LEX" = :; then
+  LEX=${am_missing_run}flex
+fi])
+
+# Add --enable-maintainer-mode option to configure.         -*- Autoconf -*-
+# From Jim Meyering
+
+# Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 5
+
+# AM_MAINTAINER_MODE([DEFAULT-MODE])
+# ----------------------------------
+# Control maintainer-specific portions of Makefiles.
+# Default is to disable them, unless `enable' is passed literally.
+# For symmetry, `disable' may be passed as well.  Anyway, the user
+# can override the default with the --enable/--disable switch.
+AC_DEFUN([AM_MAINTAINER_MODE],
+[m4_case(m4_default([$1], [disable]),
+       [enable], [m4_define([am_maintainer_other], [disable])],
+       [disable], [m4_define([am_maintainer_other], [enable])],
+       [m4_define([am_maintainer_other], [enable])
+        m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
+AC_MSG_CHECKING([whether to am_maintainer_other maintainer-specific portions of Makefiles])
+  dnl maintainer-mode's default is 'disable' unless 'enable' is passed
+  AC_ARG_ENABLE([maintainer-mode],
+[  --][am_maintainer_other][-maintainer-mode  am_maintainer_other make rules and dependencies not useful
+			  (and sometimes confusing) to the casual installer],
+      [USE_MAINTAINER_MODE=$enableval],
+      [USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
+  AC_MSG_RESULT([$USE_MAINTAINER_MODE])
+  AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
+  MAINT=$MAINTAINER_MODE_TRUE
+  AC_SUBST([MAINT])dnl
+]
+)
+
+AU_DEFUN([jm_MAINTAINER_MODE], [AM_MAINTAINER_MODE])
+
+# Check to see how 'make' treats includes.	            -*- Autoconf -*-
+
+# Copyright (C) 2001, 2002, 2003, 2005, 2009  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 4
+
+# AM_MAKE_INCLUDE()
+# -----------------
+# Check to see how make treats includes.
+AC_DEFUN([AM_MAKE_INCLUDE],
+[am_make=${MAKE-make}
+cat > confinc << 'END'
+am__doit:
+	@echo this is the am__doit target
+.PHONY: am__doit
+END
+# If we don't find an include directive, just comment out the code.
+AC_MSG_CHECKING([for style of include used by $am_make])
+am__include="#"
+am__quote=
+_am_result=none
+# First try GNU make style include.
+echo "include confinc" > confmf
+# Ignore all kinds of additional output from `make'.
+case `$am_make -s -f confmf 2> /dev/null` in #(
+*the\ am__doit\ target*)
+  am__include=include
+  am__quote=
+  _am_result=GNU
+  ;;
+esac
+# Now try BSD make style include.
+if test "$am__include" = "#"; then
+   echo '.include "confinc"' > confmf
+   case `$am_make -s -f confmf 2> /dev/null` in #(
+   *the\ am__doit\ target*)
+     am__include=.include
+     am__quote="\""
+     _am_result=BSD
+     ;;
+   esac
+fi
+AC_SUBST([am__include])
+AC_SUBST([am__quote])
+AC_MSG_RESULT([$_am_result])
+rm -f confinc confmf
+])
+
+# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
+
+# Copyright (C) 1997, 1999, 2000, 2001, 2003, 2004, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 6
+
+# AM_MISSING_PROG(NAME, PROGRAM)
+# ------------------------------
+AC_DEFUN([AM_MISSING_PROG],
+[AC_REQUIRE([AM_MISSING_HAS_RUN])
+$1=${$1-"${am_missing_run}$2"}
+AC_SUBST($1)])
+
+
+# AM_MISSING_HAS_RUN
+# ------------------
+# Define MISSING if not defined so far and test if it supports --run.
+# If it does, set am_missing_run to use it, otherwise, to nothing.
+AC_DEFUN([AM_MISSING_HAS_RUN],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${MISSING+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
+  *)
+    MISSING="\${SHELL} $am_aux_dir/missing" ;;
+  esac
+fi
+# Use eval to expand $SHELL
+if eval "$MISSING --run true"; then
+  am_missing_run="$MISSING --run "
+else
+  am_missing_run=
+  AC_MSG_WARN([`missing' script is too old or missing])
+fi
+])
+
+# Copyright (C) 2003, 2004, 2005, 2006  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_MKDIR_P
+# ---------------
+# Check for `mkdir -p'.
+AC_DEFUN([AM_PROG_MKDIR_P],
+[AC_PREREQ([2.60])dnl
+AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+dnl Automake 1.8 to 1.9.6 used to define mkdir_p.  We now use MKDIR_P,
+dnl while keeping a definition of mkdir_p for backward compatibility.
+dnl @MKDIR_P@ is magic: AC_OUTPUT adjusts its value for each Makefile.
+dnl However we cannot define mkdir_p as $(MKDIR_P) for the sake of
+dnl Makefile.ins that do not define MKDIR_P, so we do our own
+dnl adjustment using top_builddir (which is defined more often than
+dnl MKDIR_P).
+AC_SUBST([mkdir_p], ["$MKDIR_P"])dnl
+case $mkdir_p in
+  [[\\/$]]* | ?:[[\\/]]*) ;;
+  */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;;
+esac
+])
+
+# Helper functions for option handling.                     -*- Autoconf -*-
+
+# Copyright (C) 2001, 2002, 2003, 2005, 2008  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 4
+
+# _AM_MANGLE_OPTION(NAME)
+# -----------------------
+AC_DEFUN([_AM_MANGLE_OPTION],
+[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
+
+# _AM_SET_OPTION(NAME)
+# ------------------------------
+# Set option NAME.  Presently that only means defining a flag for this option.
+AC_DEFUN([_AM_SET_OPTION],
+[m4_define(_AM_MANGLE_OPTION([$1]), 1)])
+
+# _AM_SET_OPTIONS(OPTIONS)
+# ----------------------------------
+# OPTIONS is a space-separated list of Automake options.
+AC_DEFUN([_AM_SET_OPTIONS],
+[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
+
+# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
+# -------------------------------------------
+# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
+AC_DEFUN([_AM_IF_OPTION],
+[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
+
+# Check to make sure that the build environment is sane.    -*- Autoconf -*-
+
+# Copyright (C) 1996, 1997, 2000, 2001, 2003, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 5
+
+# AM_SANITY_CHECK
+# ---------------
+AC_DEFUN([AM_SANITY_CHECK],
+[AC_MSG_CHECKING([whether build environment is sane])
+# Just in case
+sleep 1
+echo timestamp > conftest.file
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[[\\\"\#\$\&\'\`$am_lf]]*)
+    AC_MSG_ERROR([unsafe absolute working directory name]);;
+esac
+case $srcdir in
+  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
+    AC_MSG_ERROR([unsafe srcdir value: `$srcdir']);;
+esac
+
+# Do `set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+   if test "$[*]" = "X"; then
+      # -L didn't work.
+      set X `ls -t "$srcdir/configure" conftest.file`
+   fi
+   rm -f conftest.file
+   if test "$[*]" != "X $srcdir/configure conftest.file" \
+      && test "$[*]" != "X conftest.file $srcdir/configure"; then
+
+      # If neither matched, then we have a broken ls.  This can happen
+      # if, for instance, CONFIG_SHELL is bash and it inherits a
+      # broken ls alias from the environment.  This has actually
+      # happened.  Such a system could not be considered "sane".
+      AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
+alias in your environment])
+   fi
+
+   test "$[2]" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   AC_MSG_ERROR([newly created file is older than distributed files!
+Check your system clock])
+fi
+AC_MSG_RESULT(yes)])
+
+# Copyright (C) 2001, 2003, 2005  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_STRIP
+# ---------------------
+# One issue with vendor `install' (even GNU) is that you can't
+# specify the program used to strip binaries.  This is especially
+# annoying in cross-compiling environments, where the build's strip
+# is unlikely to handle the host's binaries.
+# Fortunately install-sh will honor a STRIPPROG variable, so we
+# always use install-sh in `make install-strip', and initialize
+# STRIPPROG with the value of the STRIP variable (set by the user).
+AC_DEFUN([AM_PROG_INSTALL_STRIP],
+[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+# Installed binaries are usually stripped using `strip' when the user
+# run `make install-strip'.  However `strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the `STRIP' environment variable to overrule this program.
+dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
+if test "$cross_compiling" != no; then
+  AC_CHECK_TOOL([STRIP], [strip], :)
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+AC_SUBST([INSTALL_STRIP_PROGRAM])])
+
+# Copyright (C) 2006, 2008  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 2
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
+# This macro is traced by Automake.
+AC_DEFUN([_AM_SUBST_NOTMAKE])
+
+# AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Public sister of _AM_SUBST_NOTMAKE.
+AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
+
+# Check how to create a tarball.                            -*- Autoconf -*-
+
+# Copyright (C) 2004, 2005  Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 2
+
+# _AM_PROG_TAR(FORMAT)
+# --------------------
+# Check how to create a tarball in format FORMAT.
+# FORMAT should be one of `v7', `ustar', or `pax'.
+#
+# Substitute a variable $(am__tar) that is a command
+# writing to stdout a FORMAT-tarball containing the directory
+# $tardir.
+#     tardir=directory && $(am__tar) > result.tar
+#
+# Substitute a variable $(am__untar) that extract such
+# a tarball read from stdin.
+#     $(am__untar) < result.tar
+AC_DEFUN([_AM_PROG_TAR],
+[# Always define AMTAR for backward compatibility.
+AM_MISSING_PROG([AMTAR], [tar])
+m4_if([$1], [v7],
+     [am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
+     [m4_case([$1], [ustar],, [pax],,
+              [m4_fatal([Unknown tar format])])
+AC_MSG_CHECKING([how to create a $1 tar archive])
+# Loop over all known methods to create a tar archive until one works.
+_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
+_am_tools=${am_cv_prog_tar_$1-$_am_tools}
+# Do not fold the above two line into one, because Tru64 sh and
+# Solaris sh will not grok spaces in the rhs of `-'.
+for _am_tool in $_am_tools
+do
+  case $_am_tool in
+  gnutar)
+    for _am_tar in tar gnutar gtar;
+    do
+      AM_RUN_LOG([$_am_tar --version]) && break
+    done
+    am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
+    am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
+    am__untar="$_am_tar -xf -"
+    ;;
+  plaintar)
+    # Must skip GNU tar: if it does not support --format= it doesn't create
+    # ustar tarball either.
+    (tar --version) >/dev/null 2>&1 && continue
+    am__tar='tar chf - "$$tardir"'
+    am__tar_='tar chf - "$tardir"'
+    am__untar='tar xf -'
+    ;;
+  pax)
+    am__tar='pax -L -x $1 -w "$$tardir"'
+    am__tar_='pax -L -x $1 -w "$tardir"'
+    am__untar='pax -r'
+    ;;
+  cpio)
+    am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
+    am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
+    am__untar='cpio -i -H $1 -d'
+    ;;
+  none)
+    am__tar=false
+    am__tar_=false
+    am__untar=false
+    ;;
+  esac
+
+  # If the value was cached, stop now.  We just wanted to have am__tar
+  # and am__untar set.
+  test -n "${am_cv_prog_tar_$1}" && break
+
+  # tar/untar a dummy directory, and stop if the command works
+  rm -rf conftest.dir
+  mkdir conftest.dir
+  echo GrepMe > conftest.dir/file
+  AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
+  rm -rf conftest.dir
+  if test -s conftest.tar; then
+    AM_RUN_LOG([$am__untar <conftest.tar])
+    grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
+  fi
+done
+rm -rf conftest.dir
+
+AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
+AC_MSG_RESULT([$am_cv_prog_tar_$1])])
+AC_SUBST([am__tar])
+AC_SUBST([am__untar])
+]) # _AM_PROG_TAR
+
+m4_include([m4/ax_check_compiler_flags.m4])
+m4_include([m4/ax_ext.m4])
+m4_include([m4/ax_gcc_x86_cpuid.m4])
+m4_include([m4/libtool.m4])
+m4_include([m4/ltoptions.m4])
+m4_include([m4/ltsugar.m4])
+m4_include([m4/ltversion.m4])
+m4_include([m4/lt~obsolete.m4])
diff --git a/config.guess b/config.guess
new file mode 100755
index 0000000..c2246a4
--- /dev/null
+++ b/config.guess
@@ -0,0 +1,1502 @@
+#! /bin/sh
+# Attempt to guess a canonical system name.
+#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+#   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+#   Free Software Foundation, Inc.
+
+timestamp='2009-12-30'
+
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+
+# Originally written by Per Bothner.  Please send patches (context
+# diff format) to <config-patches@gnu.org> and include a ChangeLog
+# entry.
+#
+# This script attempts to guess a canonical system name similar to
+# config.sub.  If it succeeds, it prints the system name on stdout, and
+# exits with 0.  Otherwise, it exits with 1.
+#
+# You can get the latest version of this script from:
+# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION]
+
+Output the configuration name of the system \`$me' is run on.
+
+Operation modes:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.guess ($timestamp)
+
+Originally written by Per Bothner.
+Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free
+Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help" >&2
+       exit 1 ;;
+    * )
+       break ;;
+  esac
+done
+
+if test $# != 0; then
+  echo "$me: too many arguments$help" >&2
+  exit 1
+fi
+
+trap 'exit 1' 1 2 15
+
+# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
+# compiler to aid in system detection is discouraged as it requires
+# temporary files to be created and, as you can see below, it is a
+# headache to deal with in a portable fashion.
+
+# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
+# use `HOST_CC' if defined, but it is deprecated.
+
+# Portable tmp directory creation inspired by the Autoconf team.
+
+set_cc_for_build='
+trap "exitcode=\$?; (rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null) && exit \$exitcode" 0 ;
+trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ;
+: ${TMPDIR=/tmp} ;
+ { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
+ { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } ||
+ { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } ||
+ { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ;
+dummy=$tmp/dummy ;
+tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ;
+case $CC_FOR_BUILD,$HOST_CC,$CC in
+ ,,)    echo "int x;" > $dummy.c ;
+	for c in cc gcc c89 c99 ; do
+	  if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then
+	     CC_FOR_BUILD="$c"; break ;
+	  fi ;
+	done ;
+	if test x"$CC_FOR_BUILD" = x ; then
+	  CC_FOR_BUILD=no_compiler_found ;
+	fi
+	;;
+ ,,*)   CC_FOR_BUILD=$CC ;;
+ ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
+esac ; set_cc_for_build= ;'
+
+# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
+# (ghazi@noc.rutgers.edu 1994-08-24)
+if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
+	PATH=$PATH:/.attbin ; export PATH
+fi
+
+UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
+UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+
+# Note: order is significant - the case branches are not exclusive.
+
+case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
+    *:NetBSD:*:*)
+	# NetBSD (nbsd) targets should (where applicable) match one or
+	# more of the tupples: *-*-netbsdelf*, *-*-netbsdaout*,
+	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
+	# switched to ELF, *-*-netbsd* would select the old
+	# object file format.  This provides both forward
+	# compatibility and a consistent mechanism for selecting the
+	# object file format.
+	#
+	# Note: NetBSD doesn't particularly care about the vendor
+	# portion of the name.  We always set it to "unknown".
+	sysctl="sysctl -n hw.machine_arch"
+	UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \
+	    /usr/sbin/$sysctl 2>/dev/null || echo unknown)`
+	case "${UNAME_MACHINE_ARCH}" in
+	    armeb) machine=armeb-unknown ;;
+	    arm*) machine=arm-unknown ;;
+	    sh3el) machine=shl-unknown ;;
+	    sh3eb) machine=sh-unknown ;;
+	    sh5el) machine=sh5le-unknown ;;
+	    *) machine=${UNAME_MACHINE_ARCH}-unknown ;;
+	esac
+	# The Operating System including object format, if it has switched
+	# to ELF recently, or will in the future.
+	case "${UNAME_MACHINE_ARCH}" in
+	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
+		eval $set_cc_for_build
+		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
+			| grep -q __ELF__
+		then
+		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
+		    # Return netbsd for either.  FIX?
+		    os=netbsd
+		else
+		    os=netbsdelf
+		fi
+		;;
+	    *)
+	        os=netbsd
+		;;
+	esac
+	# The OS release
+	# Debian GNU/NetBSD machines have a different userland, and
+	# thus, need a distinct triplet. However, they do not need
+	# kernel version information, so it can be replaced with a
+	# suitable tag, in the style of linux-gnu.
+	case "${UNAME_VERSION}" in
+	    Debian*)
+		release='-gnu'
+		;;
+	    *)
+		release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+		;;
+	esac
+	# Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
+	# contains redundant information, the shorter form:
+	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
+	echo "${machine}-${os}${release}"
+	exit ;;
+    *:OpenBSD:*:*)
+	UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
+	echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE}
+	exit ;;
+    *:ekkoBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-ekkobsd${UNAME_RELEASE}
+	exit ;;
+    *:SolidBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-solidbsd${UNAME_RELEASE}
+	exit ;;
+    macppc:MirBSD:*:*)
+	echo powerpc-unknown-mirbsd${UNAME_RELEASE}
+	exit ;;
+    *:MirBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-mirbsd${UNAME_RELEASE}
+	exit ;;
+    alpha:OSF1:*:*)
+	case $UNAME_RELEASE in
+	*4.0)
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+		;;
+	*5.*)
+	        UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
+		;;
+	esac
+	# According to Compaq, /usr/sbin/psrinfo has been available on
+	# OSF/1 and Tru64 systems produced since 1995.  I hope that
+	# covers most systems running today.  This code pipes the CPU
+	# types through head -n 1, so we only detect the type of CPU 0.
+	ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
+	case "$ALPHA_CPU_TYPE" in
+	    "EV4 (21064)")
+		UNAME_MACHINE="alpha" ;;
+	    "EV4.5 (21064)")
+		UNAME_MACHINE="alpha" ;;
+	    "LCA4 (21066/21068)")
+		UNAME_MACHINE="alpha" ;;
+	    "EV5 (21164)")
+		UNAME_MACHINE="alphaev5" ;;
+	    "EV5.6 (21164A)")
+		UNAME_MACHINE="alphaev56" ;;
+	    "EV5.6 (21164PC)")
+		UNAME_MACHINE="alphapca56" ;;
+	    "EV5.7 (21164PC)")
+		UNAME_MACHINE="alphapca57" ;;
+	    "EV6 (21264)")
+		UNAME_MACHINE="alphaev6" ;;
+	    "EV6.7 (21264A)")
+		UNAME_MACHINE="alphaev67" ;;
+	    "EV6.8CB (21264C)")
+		UNAME_MACHINE="alphaev68" ;;
+	    "EV6.8AL (21264B)")
+		UNAME_MACHINE="alphaev68" ;;
+	    "EV6.8CX (21264D)")
+		UNAME_MACHINE="alphaev68" ;;
+	    "EV6.9A (21264/EV69A)")
+		UNAME_MACHINE="alphaev69" ;;
+	    "EV7 (21364)")
+		UNAME_MACHINE="alphaev7" ;;
+	    "EV7.9 (21364A)")
+		UNAME_MACHINE="alphaev79" ;;
+	esac
+	# A Pn.n version is a patched version.
+	# A Vn.n version is a released version.
+	# A Tn.n version is a released field test version.
+	# A Xn.n version is an unreleased experimental baselevel.
+	# 1.2 uses "1.2" for uname -r.
+	echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[PVTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+	exit ;;
+    Alpha\ *:Windows_NT*:*)
+	# How do we know it's Interix rather than the generic POSIX subsystem?
+	# Should we change UNAME_MACHINE based on the output of uname instead
+	# of the specific Alpha model?
+	echo alpha-pc-interix
+	exit ;;
+    21064:Windows_NT:50:3)
+	echo alpha-dec-winnt3.5
+	exit ;;
+    Amiga*:UNIX_System_V:4.0:*)
+	echo m68k-unknown-sysv4
+	exit ;;
+    *:[Aa]miga[Oo][Ss]:*:*)
+	echo ${UNAME_MACHINE}-unknown-amigaos
+	exit ;;
+    *:[Mm]orph[Oo][Ss]:*:*)
+	echo ${UNAME_MACHINE}-unknown-morphos
+	exit ;;
+    *:OS/390:*:*)
+	echo i370-ibm-openedition
+	exit ;;
+    *:z/VM:*:*)
+	echo s390-ibm-zvmoe
+	exit ;;
+    *:OS400:*:*)
+        echo powerpc-ibm-os400
+	exit ;;
+    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
+	echo arm-acorn-riscix${UNAME_RELEASE}
+	exit ;;
+    arm:riscos:*:*|arm:RISCOS:*:*)
+	echo arm-unknown-riscos
+	exit ;;
+    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
+	echo hppa1.1-hitachi-hiuxmpp
+	exit ;;
+    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
+	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
+	if test "`(/bin/universe) 2>/dev/null`" = att ; then
+		echo pyramid-pyramid-sysv3
+	else
+		echo pyramid-pyramid-bsd
+	fi
+	exit ;;
+    NILE*:*:*:dcosx)
+	echo pyramid-pyramid-svr4
+	exit ;;
+    DRS?6000:unix:4.0:6*)
+	echo sparc-icl-nx6
+	exit ;;
+    DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
+	case `/usr/bin/uname -p` in
+	    sparc) echo sparc-icl-nx7; exit ;;
+	esac ;;
+    s390x:SunOS:*:*)
+	echo ${UNAME_MACHINE}-ibm-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    sun4H:SunOS:5.*:*)
+	echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
+	echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
+	echo i386-pc-auroraux${UNAME_RELEASE}
+	exit ;;
+    i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
+	eval $set_cc_for_build
+	SUN_ARCH="i386"
+	# If there is a compiler, see if it is configured for 64-bit objects.
+	# Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
+	# This test works for both compilers.
+	if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
+	    if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
+		(CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
+		grep IS_64BIT_ARCH >/dev/null
+	    then
+		SUN_ARCH="x86_64"
+	    fi
+	fi
+	echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    sun4*:SunOS:6*:*)
+	# According to config.sub, this is the proper way to canonicalize
+	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
+	# it's likely to be more like Solaris than SunOS4.
+	echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    sun4*:SunOS:*:*)
+	case "`/usr/bin/arch -k`" in
+	    Series*|S4*)
+		UNAME_RELEASE=`uname -v`
+		;;
+	esac
+	# Japanese Language versions have a version number like `4.1.3-JL'.
+	echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
+	exit ;;
+    sun3*:SunOS:*:*)
+	echo m68k-sun-sunos${UNAME_RELEASE}
+	exit ;;
+    sun*:*:4.2BSD:*)
+	UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
+	case "`/bin/arch`" in
+	    sun3)
+		echo m68k-sun-sunos${UNAME_RELEASE}
+		;;
+	    sun4)
+		echo sparc-sun-sunos${UNAME_RELEASE}
+		;;
+	esac
+	exit ;;
+    aushp:SunOS:*:*)
+	echo sparc-auspex-sunos${UNAME_RELEASE}
+	exit ;;
+    # The situation for MiNT is a little confusing.  The machine name
+    # can be virtually everything (everything which is not
+    # "atarist" or "atariste" at least should have a processor
+    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
+    # to the lowercase version "mint" (or "freemint").  Finally
+    # the system name "TOS" denotes a system which is actually not
+    # MiNT.  But MiNT is downward compatible to TOS, so this should
+    # be no problem.
+    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
+        echo m68k-atari-mint${UNAME_RELEASE}
+	exit ;;
+    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
+	echo m68k-atari-mint${UNAME_RELEASE}
+        exit ;;
+    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
+        echo m68k-atari-mint${UNAME_RELEASE}
+	exit ;;
+    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
+        echo m68k-milan-mint${UNAME_RELEASE}
+        exit ;;
+    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
+        echo m68k-hades-mint${UNAME_RELEASE}
+        exit ;;
+    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
+        echo m68k-unknown-mint${UNAME_RELEASE}
+        exit ;;
+    m68k:machten:*:*)
+	echo m68k-apple-machten${UNAME_RELEASE}
+	exit ;;
+    powerpc:machten:*:*)
+	echo powerpc-apple-machten${UNAME_RELEASE}
+	exit ;;
+    RISC*:Mach:*:*)
+	echo mips-dec-mach_bsd4.3
+	exit ;;
+    RISC*:ULTRIX:*:*)
+	echo mips-dec-ultrix${UNAME_RELEASE}
+	exit ;;
+    VAX*:ULTRIX*:*:*)
+	echo vax-dec-ultrix${UNAME_RELEASE}
+	exit ;;
+    2020:CLIX:*:* | 2430:CLIX:*:*)
+	echo clipper-intergraph-clix${UNAME_RELEASE}
+	exit ;;
+    mips:*:*:UMIPS | mips:*:*:RISCos)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+#ifdef __cplusplus
+#include <stdio.h>  /* for printf() prototype */
+	int main (int argc, char *argv[]) {
+#else
+	int main (argc, argv) int argc; char *argv[]; {
+#endif
+	#if defined (host_mips) && defined (MIPSEB)
+	#if defined (SYSTYPE_SYSV)
+	  printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_SVR4)
+	  printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
+	  printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
+	#endif
+	#endif
+	  exit (-1);
+	}
+EOF
+	$CC_FOR_BUILD -o $dummy $dummy.c &&
+	  dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` &&
+	  SYSTEM_NAME=`$dummy $dummyarg` &&
+	    { echo "$SYSTEM_NAME"; exit; }
+	echo mips-mips-riscos${UNAME_RELEASE}
+	exit ;;
+    Motorola:PowerMAX_OS:*:*)
+	echo powerpc-motorola-powermax
+	exit ;;
+    Motorola:*:4.3:PL8-*)
+	echo powerpc-harris-powermax
+	exit ;;
+    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
+	echo powerpc-harris-powermax
+	exit ;;
+    Night_Hawk:Power_UNIX:*:*)
+	echo powerpc-harris-powerunix
+	exit ;;
+    m88k:CX/UX:7*:*)
+	echo m88k-harris-cxux7
+	exit ;;
+    m88k:*:4*:R4*)
+	echo m88k-motorola-sysv4
+	exit ;;
+    m88k:*:3*:R3*)
+	echo m88k-motorola-sysv3
+	exit ;;
+    AViiON:dgux:*:*)
+        # DG/UX returns AViiON for all architectures
+        UNAME_PROCESSOR=`/usr/bin/uname -p`
+	if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ]
+	then
+	    if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \
+	       [ ${TARGET_BINARY_INTERFACE}x = x ]
+	    then
+		echo m88k-dg-dgux${UNAME_RELEASE}
+	    else
+		echo m88k-dg-dguxbcs${UNAME_RELEASE}
+	    fi
+	else
+	    echo i586-dg-dgux${UNAME_RELEASE}
+	fi
+ 	exit ;;
+    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
+	echo m88k-dolphin-sysv3
+	exit ;;
+    M88*:*:R3*:*)
+	# Delta 88k system running SVR3
+	echo m88k-motorola-sysv3
+	exit ;;
+    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
+	echo m88k-tektronix-sysv3
+	exit ;;
+    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
+	echo m68k-tektronix-bsd
+	exit ;;
+    *:IRIX*:*:*)
+	echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
+	exit ;;
+    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
+	echo romp-ibm-aix     # uname -m gives an 8 hex-code CPU id
+	exit ;;               # Note that: echo "'`uname -s`'" gives 'AIX '
+    i*86:AIX:*:*)
+	echo i386-ibm-aix
+	exit ;;
+    ia64:AIX:*:*)
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+	fi
+	echo ${UNAME_MACHINE}-ibm-aix${IBM_REV}
+	exit ;;
+    *:AIX:2:3)
+	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
+		eval $set_cc_for_build
+		sed 's/^		//' << EOF >$dummy.c
+		#include <sys/systemcfg.h>
+
+		main()
+			{
+			if (!__power_pc())
+				exit(1);
+			puts("powerpc-ibm-aix3.2.5");
+			exit(0);
+			}
+EOF
+		if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy`
+		then
+			echo "$SYSTEM_NAME"
+		else
+			echo rs6000-ibm-aix3.2.5
+		fi
+	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
+		echo rs6000-ibm-aix3.2.4
+	else
+		echo rs6000-ibm-aix3.2
+	fi
+	exit ;;
+    *:AIX:*:[456])
+	IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
+	if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then
+		IBM_ARCH=rs6000
+	else
+		IBM_ARCH=powerpc
+	fi
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+	fi
+	echo ${IBM_ARCH}-ibm-aix${IBM_REV}
+	exit ;;
+    *:AIX:*:*)
+	echo rs6000-ibm-aix
+	exit ;;
+    ibmrt:4.4BSD:*|romp-ibm:BSD:*)
+	echo romp-ibm-bsd4.4
+	exit ;;
+    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
+	echo romp-ibm-bsd${UNAME_RELEASE}   # 4.3 with uname added to
+	exit ;;                             # report: romp-ibm BSD 4.3
+    *:BOSX:*:*)
+	echo rs6000-bull-bosx
+	exit ;;
+    DPX/2?00:B.O.S.:*:*)
+	echo m68k-bull-sysv3
+	exit ;;
+    9000/[34]??:4.3bsd:1.*:*)
+	echo m68k-hp-bsd
+	exit ;;
+    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
+	echo m68k-hp-bsd4.4
+	exit ;;
+    9000/[34678]??:HP-UX:*:*)
+	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
+	case "${UNAME_MACHINE}" in
+	    9000/31? )            HP_ARCH=m68000 ;;
+	    9000/[34]?? )         HP_ARCH=m68k ;;
+	    9000/[678][0-9][0-9])
+		if [ -x /usr/bin/getconf ]; then
+		    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
+                    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
+                    case "${sc_cpu_version}" in
+                      523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0
+                      528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1
+                      532)                      # CPU_PA_RISC2_0
+                        case "${sc_kernel_bits}" in
+                          32) HP_ARCH="hppa2.0n" ;;
+                          64) HP_ARCH="hppa2.0w" ;;
+			  '') HP_ARCH="hppa2.0" ;;   # HP-UX 10.20
+                        esac ;;
+                    esac
+		fi
+		if [ "${HP_ARCH}" = "" ]; then
+		    eval $set_cc_for_build
+		    sed 's/^              //' << EOF >$dummy.c
+
+              #define _HPUX_SOURCE
+              #include <stdlib.h>
+              #include <unistd.h>
+
+              int main ()
+              {
+              #if defined(_SC_KERNEL_BITS)
+                  long bits = sysconf(_SC_KERNEL_BITS);
+              #endif
+                  long cpu  = sysconf (_SC_CPU_VERSION);
+
+                  switch (cpu)
+              	{
+              	case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
+              	case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
+              	case CPU_PA_RISC2_0:
+              #if defined(_SC_KERNEL_BITS)
+              	    switch (bits)
+              		{
+              		case 64: puts ("hppa2.0w"); break;
+              		case 32: puts ("hppa2.0n"); break;
+              		default: puts ("hppa2.0"); break;
+              		} break;
+              #else  /* !defined(_SC_KERNEL_BITS) */
+              	    puts ("hppa2.0"); break;
+              #endif
+              	default: puts ("hppa1.0"); break;
+              	}
+                  exit (0);
+              }
+EOF
+		    (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
+		    test -z "$HP_ARCH" && HP_ARCH=hppa
+		fi ;;
+	esac
+	if [ ${HP_ARCH} = "hppa2.0w" ]
+	then
+	    eval $set_cc_for_build
+
+	    # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
+	    # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
+	    # generating 64-bit code.  GNU and HP use different nomenclature:
+	    #
+	    # $ CC_FOR_BUILD=cc ./config.guess
+	    # => hppa2.0w-hp-hpux11.23
+	    # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
+	    # => hppa64-hp-hpux11.23
+
+	    if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
+		grep -q __LP64__
+	    then
+		HP_ARCH="hppa2.0w"
+	    else
+		HP_ARCH="hppa64"
+	    fi
+	fi
+	echo ${HP_ARCH}-hp-hpux${HPUX_REV}
+	exit ;;
+    ia64:HP-UX:*:*)
+	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
+	echo ia64-hp-hpux${HPUX_REV}
+	exit ;;
+    3050*:HI-UX:*:*)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#include <unistd.h>
+	int
+	main ()
+	{
+	  long cpu = sysconf (_SC_CPU_VERSION);
+	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
+	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
+	     results, however.  */
+	  if (CPU_IS_PA_RISC (cpu))
+	    {
+	      switch (cpu)
+		{
+		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
+		  default: puts ("hppa-hitachi-hiuxwe2"); break;
+		}
+	    }
+	  else if (CPU_IS_HP_MC68K (cpu))
+	    puts ("m68k-hitachi-hiuxwe2");
+	  else puts ("unknown-hitachi-hiuxwe2");
+	  exit (0);
+	}
+EOF
+	$CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` &&
+		{ echo "$SYSTEM_NAME"; exit; }
+	echo unknown-hitachi-hiuxwe2
+	exit ;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
+	echo hppa1.1-hp-bsd
+	exit ;;
+    9000/8??:4.3bsd:*:*)
+	echo hppa1.0-hp-bsd
+	exit ;;
+    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
+	echo hppa1.0-hp-mpeix
+	exit ;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
+	echo hppa1.1-hp-osf
+	exit ;;
+    hp8??:OSF1:*:*)
+	echo hppa1.0-hp-osf
+	exit ;;
+    i*86:OSF1:*:*)
+	if [ -x /usr/sbin/sysversion ] ; then
+	    echo ${UNAME_MACHINE}-unknown-osf1mk
+	else
+	    echo ${UNAME_MACHINE}-unknown-osf1
+	fi
+	exit ;;
+    parisc*:Lites*:*:*)
+	echo hppa1.1-hp-lites
+	exit ;;
+    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
+	echo c1-convex-bsd
+        exit ;;
+    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+        exit ;;
+    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
+	echo c34-convex-bsd
+        exit ;;
+    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
+	echo c38-convex-bsd
+        exit ;;
+    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
+	echo c4-convex-bsd
+        exit ;;
+    CRAY*Y-MP:*:*:*)
+	echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*[A-Z]90:*:*:*)
+	echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
+	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
+	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
+	      -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*TS:*:*:*)
+	echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*T3E:*:*:*)
+	echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    CRAY*SV1:*:*:*)
+	echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    *:UNICOS/mp:*:*)
+	echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
+	exit ;;
+    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
+	FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+        FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
+        FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
+        echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+        exit ;;
+    5000:UNIX_System_V:4.*:*)
+        FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
+        FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'`
+        echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+	exit ;;
+    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
+	echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
+	exit ;;
+    sparc*:BSD/OS:*:*)
+	echo sparc-unknown-bsdi${UNAME_RELEASE}
+	exit ;;
+    *:BSD/OS:*:*)
+	echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE}
+	exit ;;
+    *:FreeBSD:*:*)
+	case ${UNAME_MACHINE} in
+	    pc98)
+		echo i386-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
+	    amd64)
+		echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
+	    *)
+		echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
+	esac
+	exit ;;
+    i*:CYGWIN*:*)
+	echo ${UNAME_MACHINE}-pc-cygwin
+	exit ;;
+    *:MINGW*:*)
+	echo ${UNAME_MACHINE}-pc-mingw32
+	exit ;;
+    i*:windows32*:*)
+    	# uname -m includes "-pc" on this system.
+    	echo ${UNAME_MACHINE}-mingw32
+	exit ;;
+    i*:PW*:*)
+	echo ${UNAME_MACHINE}-pc-pw32
+	exit ;;
+    *:Interix*:*)
+    	case ${UNAME_MACHINE} in
+	    x86)
+		echo i586-pc-interix${UNAME_RELEASE}
+		exit ;;
+	    authenticamd | genuineintel | EM64T)
+		echo x86_64-unknown-interix${UNAME_RELEASE}
+		exit ;;
+	    IA64)
+		echo ia64-unknown-interix${UNAME_RELEASE}
+		exit ;;
+	esac ;;
+    [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*)
+	echo i${UNAME_MACHINE}-pc-mks
+	exit ;;
+    8664:Windows_NT:*)
+	echo x86_64-pc-mks
+	exit ;;
+    i*:Windows_NT*:* | Pentium*:Windows_NT*:*)
+	# How do we know it's Interix rather than the generic POSIX subsystem?
+	# It also conflicts with pre-2.0 versions of AT&T UWIN. Should we
+	# UNAME_MACHINE based on the output of uname instead of i386?
+	echo i586-pc-interix
+	exit ;;
+    i*:UWIN*:*)
+	echo ${UNAME_MACHINE}-pc-uwin
+	exit ;;
+    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
+	echo x86_64-unknown-cygwin
+	exit ;;
+    p*:CYGWIN*:*)
+	echo powerpcle-unknown-cygwin
+	exit ;;
+    prep*:SunOS:5.*:*)
+	echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit ;;
+    *:GNU:*:*)
+	# the GNU system
+	echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
+	exit ;;
+    *:GNU/*:*:*)
+	# other systems with GNU libc and userland
+	echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu
+	exit ;;
+    i*86:Minix:*:*)
+	echo ${UNAME_MACHINE}-pc-minix
+	exit ;;
+    alpha:Linux:*:*)
+	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+	  EV5)   UNAME_MACHINE=alphaev5 ;;
+	  EV56)  UNAME_MACHINE=alphaev56 ;;
+	  PCA56) UNAME_MACHINE=alphapca56 ;;
+	  PCA57) UNAME_MACHINE=alphapca56 ;;
+	  EV6)   UNAME_MACHINE=alphaev6 ;;
+	  EV67)  UNAME_MACHINE=alphaev67 ;;
+	  EV68*) UNAME_MACHINE=alphaev68 ;;
+        esac
+	objdump --private-headers /bin/sh | grep -q ld.so.1
+	if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi
+	echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC}
+	exit ;;
+    arm*:Linux:*:*)
+	eval $set_cc_for_build
+	if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
+	    | grep -q __ARM_EABI__
+	then
+	    echo ${UNAME_MACHINE}-unknown-linux-gnu
+	else
+	    echo ${UNAME_MACHINE}-unknown-linux-gnueabi
+	fi
+	exit ;;
+    avr32*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    cris:Linux:*:*)
+	echo cris-axis-linux-gnu
+	exit ;;
+    crisv32:Linux:*:*)
+	echo crisv32-axis-linux-gnu
+	exit ;;
+    frv:Linux:*:*)
+    	echo frv-unknown-linux-gnu
+	exit ;;
+    i*86:Linux:*:*)
+	LIBC=gnu
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#ifdef __dietlibc__
+	LIBC=dietlibc
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'`
+	echo "${UNAME_MACHINE}-pc-linux-${LIBC}"
+	exit ;;
+    ia64:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    m32r*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    m68*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    mips:Linux:*:* | mips64:Linux:*:*)
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#undef CPU
+	#undef ${UNAME_MACHINE}
+	#undef ${UNAME_MACHINE}el
+	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+	CPU=${UNAME_MACHINE}el
+	#else
+	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+	CPU=${UNAME_MACHINE}
+	#else
+	CPU=
+	#endif
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
+	test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; }
+	;;
+    or32:Linux:*:*)
+	echo or32-unknown-linux-gnu
+	exit ;;
+    padre:Linux:*:*)
+	echo sparc-unknown-linux-gnu
+	exit ;;
+    parisc64:Linux:*:* | hppa64:Linux:*:*)
+	echo hppa64-unknown-linux-gnu
+	exit ;;
+    parisc:Linux:*:* | hppa:Linux:*:*)
+	# Look for CPU level
+	case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
+	  PA7*) echo hppa1.1-unknown-linux-gnu ;;
+	  PA8*) echo hppa2.0-unknown-linux-gnu ;;
+	  *)    echo hppa-unknown-linux-gnu ;;
+	esac
+	exit ;;
+    ppc64:Linux:*:*)
+	echo powerpc64-unknown-linux-gnu
+	exit ;;
+    ppc:Linux:*:*)
+	echo powerpc-unknown-linux-gnu
+	exit ;;
+    s390:Linux:*:* | s390x:Linux:*:*)
+	echo ${UNAME_MACHINE}-ibm-linux
+	exit ;;
+    sh64*:Linux:*:*)
+    	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    sh*:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    sparc:Linux:*:* | sparc64:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    vax:Linux:*:*)
+	echo ${UNAME_MACHINE}-dec-linux-gnu
+	exit ;;
+    x86_64:Linux:*:*)
+	echo x86_64-unknown-linux-gnu
+	exit ;;
+    xtensa*:Linux:*:*)
+    	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
+    i*86:DYNIX/ptx:4*:*)
+	# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
+	# earlier versions are messed up and put the nodename in both
+	# sysname and nodename.
+	echo i386-sequent-sysv4
+	exit ;;
+    i*86:UNIX_SV:4.2MP:2.*)
+        # Unixware is an offshoot of SVR4, but it has its own version
+        # number series starting with 2...
+        # I am not positive that other SVR4 systems won't match this,
+	# I just have to hope.  -- rms.
+        # Use sysv4.2uw... so that sysv4* matches it.
+	echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
+	exit ;;
+    i*86:OS/2:*:*)
+	# If we were able to find `uname', then EMX Unix compatibility
+	# is probably installed.
+	echo ${UNAME_MACHINE}-pc-os2-emx
+	exit ;;
+    i*86:XTS-300:*:STOP)
+	echo ${UNAME_MACHINE}-unknown-stop
+	exit ;;
+    i*86:atheos:*:*)
+	echo ${UNAME_MACHINE}-unknown-atheos
+	exit ;;
+    i*86:syllable:*:*)
+	echo ${UNAME_MACHINE}-pc-syllable
+	exit ;;
+    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
+	echo i386-unknown-lynxos${UNAME_RELEASE}
+	exit ;;
+    i*86:*DOS:*:*)
+	echo ${UNAME_MACHINE}-pc-msdosdjgpp
+	exit ;;
+    i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*)
+	UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'`
+	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
+		echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL}
+	else
+		echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL}
+	fi
+	exit ;;
+    i*86:*:5:[678]*)
+    	# UnixWare 7.x, OpenUNIX and OpenServer 6.
+	case `/bin/uname -X | grep "^Machine"` in
+	    *486*)	     UNAME_MACHINE=i486 ;;
+	    *Pentium)	     UNAME_MACHINE=i586 ;;
+	    *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
+	esac
+	echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
+	exit ;;
+    i*86:*:3.2:*)
+	if test -f /usr/options/cb.name; then
+		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+		echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
+	elif /bin/uname -X 2>/dev/null >/dev/null ; then
+		UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
+		(/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
+		(/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
+			&& UNAME_MACHINE=i586
+		(/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		(/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
+			&& UNAME_MACHINE=i686
+		echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
+	else
+		echo ${UNAME_MACHINE}-pc-sysv32
+	fi
+	exit ;;
+    pc:*:*:*)
+	# Left here for compatibility:
+        # uname -m prints for DJGPP always 'pc', but it prints nothing about
+        # the processor, so we play safe by assuming i586.
+	# Note: whatever this is, it MUST be the same as what config.sub
+	# prints for the "djgpp" host, or else GDB configury will decide that
+	# this is a cross-build.
+	echo i586-pc-msdosdjgpp
+        exit ;;
+    Intel:Mach:3*:*)
+	echo i386-pc-mach3
+	exit ;;
+    paragon:*:*:*)
+	echo i860-intel-osf1
+	exit ;;
+    i860:*:4.*:*) # i860-SVR4
+	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
+	  echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
+	else # Add other i860-SVR4 vendors below as they are discovered.
+	  echo i860-unknown-sysv${UNAME_RELEASE}  # Unknown i860-SVR4
+	fi
+	exit ;;
+    mini*:CTIX:SYS*5:*)
+	# "miniframe"
+	echo m68010-convergent-sysv
+	exit ;;
+    mc68k:UNIX:SYSTEM5:3.51m)
+	echo m68k-convergent-sysv
+	exit ;;
+    M680?0:D-NIX:5.3:*)
+	echo m68k-diab-dnix
+	exit ;;
+    M68*:*:R3V[5678]*:*)
+	test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
+    3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
+	OS_REL=''
+	test -r /etc/.relid \
+	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	  && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
+    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
+        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+          && { echo i486-ncr-sysv4; exit; } ;;
+    NCR*:*:4.2:* | MPRAS*:*:4.2:*)
+	OS_REL='.3'
+	test -r /etc/.relid \
+	    && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	    && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	    && { echo i586-ncr-sysv4.3${OS_REL}; exit; }
+	/bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
+	    && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
+    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
+	echo m68k-unknown-lynxos${UNAME_RELEASE}
+	exit ;;
+    mc68030:UNIX_System_V:4.*:*)
+	echo m68k-atari-sysv4
+	exit ;;
+    TSUNAMI:LynxOS:2.*:*)
+	echo sparc-unknown-lynxos${UNAME_RELEASE}
+	exit ;;
+    rs6000:LynxOS:2.*:*)
+	echo rs6000-unknown-lynxos${UNAME_RELEASE}
+	exit ;;
+    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
+	echo powerpc-unknown-lynxos${UNAME_RELEASE}
+	exit ;;
+    SM[BE]S:UNIX_SV:*:*)
+	echo mips-dde-sysv${UNAME_RELEASE}
+	exit ;;
+    RM*:ReliantUNIX-*:*:*)
+	echo mips-sni-sysv4
+	exit ;;
+    RM*:SINIX-*:*:*)
+	echo mips-sni-sysv4
+	exit ;;
+    *:SINIX-*:*:*)
+	if uname -p 2>/dev/null >/dev/null ; then
+		UNAME_MACHINE=`(uname -p) 2>/dev/null`
+		echo ${UNAME_MACHINE}-sni-sysv4
+	else
+		echo ns32k-sni-sysv
+	fi
+	exit ;;
+    PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+                      # says <Richard.M.Bartel@ccMail.Census.GOV>
+        echo i586-unisys-sysv4
+        exit ;;
+    *:UNIX_System_V:4*:FTX*)
+	# From Gerald Hewes <hewes@openmarket.com>.
+	# How about differentiating between stratus architectures? -djm
+	echo hppa1.1-stratus-sysv4
+	exit ;;
+    *:*:*:FTX*)
+	# From seanf@swdc.stratus.com.
+	echo i860-stratus-sysv4
+	exit ;;
+    i*86:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	echo ${UNAME_MACHINE}-stratus-vos
+	exit ;;
+    *:VOS:*:*)
+	# From Paul.Green@stratus.com.
+	echo hppa1.1-stratus-vos
+	exit ;;
+    mc68*:A/UX:*:*)
+	echo m68k-apple-aux${UNAME_RELEASE}
+	exit ;;
+    news*:NEWS-OS:6*:*)
+	echo mips-sony-newsos6
+	exit ;;
+    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
+	if [ -d /usr/nec ]; then
+	        echo mips-nec-sysv${UNAME_RELEASE}
+	else
+	        echo mips-unknown-sysv${UNAME_RELEASE}
+	fi
+        exit ;;
+    BeBox:BeOS:*:*)	# BeOS running on hardware made by Be, PPC only.
+	echo powerpc-be-beos
+	exit ;;
+    BeMac:BeOS:*:*)	# BeOS running on Mac or Mac clone, PPC only.
+	echo powerpc-apple-beos
+	exit ;;
+    BePC:BeOS:*:*)	# BeOS running on Intel PC compatible.
+	echo i586-pc-beos
+	exit ;;
+    BePC:Haiku:*:*)	# Haiku running on Intel PC compatible.
+	echo i586-pc-haiku
+	exit ;;
+    SX-4:SUPER-UX:*:*)
+	echo sx4-nec-superux${UNAME_RELEASE}
+	exit ;;
+    SX-5:SUPER-UX:*:*)
+	echo sx5-nec-superux${UNAME_RELEASE}
+	exit ;;
+    SX-6:SUPER-UX:*:*)
+	echo sx6-nec-superux${UNAME_RELEASE}
+	exit ;;
+    SX-7:SUPER-UX:*:*)
+	echo sx7-nec-superux${UNAME_RELEASE}
+	exit ;;
+    SX-8:SUPER-UX:*:*)
+	echo sx8-nec-superux${UNAME_RELEASE}
+	exit ;;
+    SX-8R:SUPER-UX:*:*)
+	echo sx8r-nec-superux${UNAME_RELEASE}
+	exit ;;
+    Power*:Rhapsody:*:*)
+	echo powerpc-apple-rhapsody${UNAME_RELEASE}
+	exit ;;
+    *:Rhapsody:*:*)
+	echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
+	exit ;;
+    *:Darwin:*:*)
+	UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
+	case $UNAME_PROCESSOR in
+	    i386)
+		eval $set_cc_for_build
+		if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
+		  if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
+		      (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
+		      grep IS_64BIT_ARCH >/dev/null
+		  then
+		      UNAME_PROCESSOR="x86_64"
+		  fi
+		fi ;;
+	    unknown) UNAME_PROCESSOR=powerpc ;;
+	esac
+	echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE}
+	exit ;;
+    *:procnto*:*:* | *:QNX:[0123456789]*:*)
+	UNAME_PROCESSOR=`uname -p`
+	if test "$UNAME_PROCESSOR" = "x86"; then
+		UNAME_PROCESSOR=i386
+		UNAME_MACHINE=pc
+	fi
+	echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE}
+	exit ;;
+    *:QNX:*:4*)
+	echo i386-pc-qnx
+	exit ;;
+    NSE-?:NONSTOP_KERNEL:*:*)
+	echo nse-tandem-nsk${UNAME_RELEASE}
+	exit ;;
+    NSR-?:NONSTOP_KERNEL:*:*)
+	echo nsr-tandem-nsk${UNAME_RELEASE}
+	exit ;;
+    *:NonStop-UX:*:*)
+	echo mips-compaq-nonstopux
+	exit ;;
+    BS2000:POSIX*:*:*)
+	echo bs2000-siemens-sysv
+	exit ;;
+    DS/*:UNIX_System_V:*:*)
+	echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE}
+	exit ;;
+    *:Plan9:*:*)
+	# "uname -m" is not consistent, so use $cputype instead. 386
+	# is converted to i386 for consistency with other x86
+	# operating systems.
+	if test "$cputype" = "386"; then
+	    UNAME_MACHINE=i386
+	else
+	    UNAME_MACHINE="$cputype"
+	fi
+	echo ${UNAME_MACHINE}-unknown-plan9
+	exit ;;
+    *:TOPS-10:*:*)
+	echo pdp10-unknown-tops10
+	exit ;;
+    *:TENEX:*:*)
+	echo pdp10-unknown-tenex
+	exit ;;
+    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
+	echo pdp10-dec-tops20
+	exit ;;
+    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
+	echo pdp10-xkl-tops20
+	exit ;;
+    *:TOPS-20:*:*)
+	echo pdp10-unknown-tops20
+	exit ;;
+    *:ITS:*:*)
+	echo pdp10-unknown-its
+	exit ;;
+    SEI:*:*:SEIUX)
+        echo mips-sei-seiux${UNAME_RELEASE}
+	exit ;;
+    *:DragonFly:*:*)
+	echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
+	exit ;;
+    *:*VMS:*:*)
+    	UNAME_MACHINE=`(uname -p) 2>/dev/null`
+	case "${UNAME_MACHINE}" in
+	    A*) echo alpha-dec-vms ; exit ;;
+	    I*) echo ia64-dec-vms ; exit ;;
+	    V*) echo vax-dec-vms ; exit ;;
+	esac ;;
+    *:XENIX:*:SysV)
+	echo i386-pc-xenix
+	exit ;;
+    i*86:skyos:*:*)
+	echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//'
+	exit ;;
+    i*86:rdos:*:*)
+	echo ${UNAME_MACHINE}-pc-rdos
+	exit ;;
+    i*86:AROS:*:*)
+	echo ${UNAME_MACHINE}-pc-aros
+	exit ;;
+esac
+
+#echo '(No uname command or uname output not recognized.)' 1>&2
+#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2
+
+eval $set_cc_for_build
+cat >$dummy.c <<EOF
+#ifdef _SEQUENT_
+# include <sys/types.h>
+# include <sys/utsname.h>
+#endif
+main ()
+{
+#if defined (sony)
+#if defined (MIPSEB)
+  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
+     I don't know....  */
+  printf ("mips-sony-bsd\n"); exit (0);
+#else
+#include <sys/param.h>
+  printf ("m68k-sony-newsos%s\n",
+#ifdef NEWSOS4
+          "4"
+#else
+	  ""
+#endif
+         ); exit (0);
+#endif
+#endif
+
+#if defined (__arm) && defined (__acorn) && defined (__unix)
+  printf ("arm-acorn-riscix\n"); exit (0);
+#endif
+
+#if defined (hp300) && !defined (hpux)
+  printf ("m68k-hp-bsd\n"); exit (0);
+#endif
+
+#if defined (NeXT)
+#if !defined (__ARCHITECTURE__)
+#define __ARCHITECTURE__ "m68k"
+#endif
+  int version;
+  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  if (version < 4)
+    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
+  else
+    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
+  exit (0);
+#endif
+
+#if defined (MULTIMAX) || defined (n16)
+#if defined (UMAXV)
+  printf ("ns32k-encore-sysv\n"); exit (0);
+#else
+#if defined (CMU)
+  printf ("ns32k-encore-mach\n"); exit (0);
+#else
+  printf ("ns32k-encore-bsd\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (__386BSD__)
+  printf ("i386-pc-bsd\n"); exit (0);
+#endif
+
+#if defined (sequent)
+#if defined (i386)
+  printf ("i386-sequent-dynix\n"); exit (0);
+#endif
+#if defined (ns32000)
+  printf ("ns32k-sequent-dynix\n"); exit (0);
+#endif
+#endif
+
+#if defined (_SEQUENT_)
+    struct utsname un;
+
+    uname(&un);
+
+    if (strncmp(un.version, "V2", 2) == 0) {
+	printf ("i386-sequent-ptx2\n"); exit (0);
+    }
+    if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
+	printf ("i386-sequent-ptx1\n"); exit (0);
+    }
+    printf ("i386-sequent-ptx\n"); exit (0);
+
+#endif
+
+#if defined (vax)
+# if !defined (ultrix)
+#  include <sys/param.h>
+#  if defined (BSD)
+#   if BSD == 43
+      printf ("vax-dec-bsd4.3\n"); exit (0);
+#   else
+#    if BSD == 199006
+      printf ("vax-dec-bsd4.3reno\n"); exit (0);
+#    else
+      printf ("vax-dec-bsd\n"); exit (0);
+#    endif
+#   endif
+#  else
+    printf ("vax-dec-bsd\n"); exit (0);
+#  endif
+# else
+    printf ("vax-dec-ultrix\n"); exit (0);
+# endif
+#endif
+
+#if defined (alliant) && defined (i860)
+  printf ("i860-alliant-bsd\n"); exit (0);
+#endif
+
+  exit (1);
+}
+EOF
+
+$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && SYSTEM_NAME=`$dummy` &&
+	{ echo "$SYSTEM_NAME"; exit; }
+
+# Apollos put the system type in the environment.
+
+test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit; }
+
+# Convex versions that predate uname can use getsysinfo(1)
+
+if [ -x /usr/convex/getsysinfo ]
+then
+    case `getsysinfo -f cpu_type` in
+    c1*)
+	echo c1-convex-bsd
+	exit ;;
+    c2*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+	exit ;;
+    c34*)
+	echo c34-convex-bsd
+	exit ;;
+    c38*)
+	echo c38-convex-bsd
+	exit ;;
+    c4*)
+	echo c4-convex-bsd
+	exit ;;
+    esac
+fi
+
+cat >&2 <<EOF
+$0: unable to guess system type
+
+This script, last modified $timestamp, has failed to recognize
+the operating system you are using. It is advised that you
+download the most up to date version of the config scripts from
+
+  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
+and
+  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
+
+If the version you run ($0) is already up to date, please
+send the following data and any information you think might be
+pertinent to <config-patches@gnu.org> in order to provide the needed
+information to handle your system.
+
+config.guess timestamp = $timestamp
+
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
+
+hostinfo               = `(hostinfo) 2>/dev/null`
+/bin/universe          = `(/bin/universe) 2>/dev/null`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
+/bin/arch              = `(/bin/arch) 2>/dev/null`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
+
+UNAME_MACHINE = ${UNAME_MACHINE}
+UNAME_RELEASE = ${UNAME_RELEASE}
+UNAME_SYSTEM  = ${UNAME_SYSTEM}
+UNAME_VERSION = ${UNAME_VERSION}
+EOF
+
+exit 1
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/config.sub b/config.sub
new file mode 100755
index 0000000..c2d1257
--- /dev/null
+++ b/config.sub
@@ -0,0 +1,1714 @@
+#! /bin/sh
+# Configuration validation subroutine script.
+#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+#   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+#   Free Software Foundation, Inc.
+
+timestamp='2010-01-22'
+
+# This file is (in principle) common to ALL GNU software.
+# The presence of a machine in this file suggests that SOME GNU software
+# can handle that machine.  It does not imply ALL GNU software can.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+
+# Please send patches to <config-patches@gnu.org>.  Submit a context
+# diff and a properly formatted GNU ChangeLog entry.
+#
+# Configuration subroutine to validate and canonicalize a configuration type.
+# Supply the specified configuration type as an argument.
+# If it is invalid, we print an error message on stderr and exit with code 1.
+# Otherwise, we print the canonical config type on stdout and succeed.
+
+# You can get the latest version of this script from:
+# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
+
+# This file is supposed to be the same for all GNU packages
+# and recognize all the CPU types, system types and aliases
+# that are meaningful with *any* GNU software.
+# Each package is responsible for reporting which valid configurations
+# it does not support.  The user should be able to distinguish
+# a failure to support a valid configuration from a meaningless
+# configuration.
+
+# The goal of this file is to map all the various variations of a given
+# machine specification into a single specification in the form:
+#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or in some cases, the newer four-part form:
+#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# It is wrong to echo any other type of specification.
+
+me=`echo "$0" | sed -e 's,.*/,,'`
+
+usage="\
+Usage: $0 [OPTION] CPU-MFR-OPSYS
+       $0 [OPTION] ALIAS
+
+Canonicalize a configuration name.
+
+Operation modes:
+  -h, --help         print this help, then exit
+  -t, --time-stamp   print date of last modification, then exit
+  -v, --version      print version number, then exit
+
+Report bugs and patches to <config-patches@gnu.org>."
+
+version="\
+GNU config.sub ($timestamp)
+
+Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free
+Software Foundation, Inc.
+
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+help="
+Try \`$me --help' for more information."
+
+# Parse command line
+while test $# -gt 0 ; do
+  case $1 in
+    --time-stamp | --time* | -t )
+       echo "$timestamp" ; exit ;;
+    --version | -v )
+       echo "$version" ; exit ;;
+    --help | --h* | -h )
+       echo "$usage"; exit ;;
+    -- )     # Stop option processing
+       shift; break ;;
+    - )	# Use stdin as input.
+       break ;;
+    -* )
+       echo "$me: invalid option $1$help"
+       exit 1 ;;
+
+    *local*)
+       # First pass through any local machine types.
+       echo $1
+       exit ;;
+
+    * )
+       break ;;
+  esac
+done
+
+case $# in
+ 0) echo "$me: missing argument$help" >&2
+    exit 1;;
+ 1) ;;
+ *) echo "$me: too many arguments$help" >&2
+    exit 1;;
+esac
+
+# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
+# Here we must recognize all the valid KERNEL-OS combinations.
+maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
+case $maybe_os in
+  nto-qnx* | linux-gnu* | linux-dietlibc | linux-newlib* | linux-uclibc* | \
+  uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* | \
+  kopensolaris*-gnu* | \
+  storm-chaos* | os2-emx* | rtmk-nova*)
+    os=-$maybe_os
+    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
+    ;;
+  *)
+    basic_machine=`echo $1 | sed 's/-[^-]*$//'`
+    if [ $basic_machine != $1 ]
+    then os=`echo $1 | sed 's/.*-/-/'`
+    else os=; fi
+    ;;
+esac
+
+### Let's recognize common machines as not being operating systems so
+### that things like config.sub decstation-3100 work.  We also
+### recognize some manufacturers as not being operating systems, so we
+### can provide default operating systems below.
+case $os in
+	-sun*os*)
+		# Prevent following clause from handling this invalid input.
+		;;
+	-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
+	-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
+	-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
+	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
+	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
+	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
+	-apple | -axis | -knuth | -cray | -microblaze)
+		os=
+		basic_machine=$1
+		;;
+        -bluegene*)
+	        os=-cnk
+		;;
+	-sim | -cisco | -oki | -wec | -winbond)
+		os=
+		basic_machine=$1
+		;;
+	-scout)
+		;;
+	-wrs)
+		os=-vxworks
+		basic_machine=$1
+		;;
+	-chorusos*)
+		os=-chorusos
+		basic_machine=$1
+		;;
+ 	-chorusrdb)
+ 		os=-chorusrdb
+		basic_machine=$1
+ 		;;
+	-hiux*)
+		os=-hiuxwe2
+		;;
+	-sco6)
+		os=-sco5v6
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco5)
+		os=-sco3.2v5
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco4)
+		os=-sco3.2v4
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2.[4-9]*)
+		os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2v[4-9]*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco5v6*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco*)
+		os=-sco3.2v2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-udk*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-isc)
+		os=-isc2.2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-clix*)
+		basic_machine=clipper-intergraph
+		;;
+	-isc*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-lynx*)
+		os=-lynxos
+		;;
+	-ptx*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
+		;;
+	-windowsnt*)
+		os=`echo $os | sed -e 's/windowsnt/winnt/'`
+		;;
+	-psos*)
+		os=-psos
+		;;
+	-mint | -mint[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+esac
+
+# Decode aliases for certain CPU-COMPANY combinations.
+case $basic_machine in
+	# Recognize the basic CPU types without company name.
+	# Some are omitted here because they have special meanings below.
+	1750a | 580 \
+	| a29k \
+	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
+	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
+	| am33_2.0 \
+	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr | avr32 \
+	| bfin \
+	| c4x | clipper \
+	| d10v | d30v | dlx | dsp16xx \
+	| fido | fr30 | frv \
+	| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
+	| i370 | i860 | i960 | ia64 \
+	| ip2k | iq2000 \
+	| lm32 \
+	| m32c | m32r | m32rle | m68000 | m68k | m88k \
+	| maxq | mb | microblaze | mcore | mep | metag \
+	| mips | mipsbe | mipseb | mipsel | mipsle \
+	| mips16 \
+	| mips64 | mips64el \
+	| mips64octeon | mips64octeonel \
+	| mips64orion | mips64orionel \
+	| mips64r5900 | mips64r5900el \
+	| mips64vr | mips64vrel \
+	| mips64vr4100 | mips64vr4100el \
+	| mips64vr4300 | mips64vr4300el \
+	| mips64vr5000 | mips64vr5000el \
+	| mips64vr5900 | mips64vr5900el \
+	| mipsisa32 | mipsisa32el \
+	| mipsisa32r2 | mipsisa32r2el \
+	| mipsisa64 | mipsisa64el \
+	| mipsisa64r2 | mipsisa64r2el \
+	| mipsisa64sb1 | mipsisa64sb1el \
+	| mipsisa64sr71k | mipsisa64sr71kel \
+	| mipstx39 | mipstx39el \
+	| mn10200 | mn10300 \
+	| moxie \
+	| mt \
+	| msp430 \
+	| nios | nios2 \
+	| ns16k | ns32k \
+	| or32 \
+	| pdp10 | pdp11 | pj | pjl \
+	| powerpc | powerpc64 | powerpc64le | powerpcle | ppcbe \
+	| pyramid \
+	| rx \
+	| score \
+	| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
+	| sh64 | sh64le \
+	| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
+	| sparcv8 | sparcv9 | sparcv9b | sparcv9v \
+	| spu | strongarm \
+	| tahoe | thumb | tic4x | tic80 | tron \
+	| ubicom32 \
+	| v850 | v850e \
+	| we32k \
+	| x86 | xc16x | xscale | xscalee[bl] | xstormy16 | xtensa \
+	| z8k | z80)
+		basic_machine=$basic_machine-unknown
+		;;
+	m6811 | m68hc11 | m6812 | m68hc12 | picochip)
+		# Motorola 68HC11/12.
+		basic_machine=$basic_machine-unknown
+		os=-none
+		;;
+	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
+		;;
+	ms1)
+		basic_machine=mt-unknown
+		;;
+
+	# We use `pc' rather than `unknown'
+	# because (1) that's what they normally are, and
+	# (2) the word "unknown" tends to confuse beginning users.
+	i*86 | x86_64)
+	  basic_machine=$basic_machine-pc
+	  ;;
+	# Object if more than one company name word.
+	*-*-*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+	# Recognize the basic CPU types with company name.
+	580-* \
+	| a29k-* \
+	| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
+	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
+	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
+	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
+	| avr-* | avr32-* \
+	| bfin-* | bs2000-* \
+	| c[123]* | c30-* | [cjt]90-* | c4x-* | c54x-* | c55x-* | c6x-* \
+	| clipper-* | craynv-* | cydra-* \
+	| d10v-* | d30v-* | dlx-* \
+	| elxsi-* \
+	| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
+	| h8300-* | h8500-* \
+	| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
+	| i*86-* | i860-* | i960-* | ia64-* \
+	| ip2k-* | iq2000-* \
+	| lm32-* \
+	| m32c-* | m32r-* | m32rle-* \
+	| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
+	| m88110-* | m88k-* | maxq-* | mcore-* | metag-* | microblaze-* \
+	| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
+	| mips16-* \
+	| mips64-* | mips64el-* \
+	| mips64octeon-* | mips64octeonel-* \
+	| mips64orion-* | mips64orionel-* \
+	| mips64r5900-* | mips64r5900el-* \
+	| mips64vr-* | mips64vrel-* \
+	| mips64vr4100-* | mips64vr4100el-* \
+	| mips64vr4300-* | mips64vr4300el-* \
+	| mips64vr5000-* | mips64vr5000el-* \
+	| mips64vr5900-* | mips64vr5900el-* \
+	| mipsisa32-* | mipsisa32el-* \
+	| mipsisa32r2-* | mipsisa32r2el-* \
+	| mipsisa64-* | mipsisa64el-* \
+	| mipsisa64r2-* | mipsisa64r2el-* \
+	| mipsisa64sb1-* | mipsisa64sb1el-* \
+	| mipsisa64sr71k-* | mipsisa64sr71kel-* \
+	| mipstx39-* | mipstx39el-* \
+	| mmix-* \
+	| mt-* \
+	| msp430-* \
+	| nios-* | nios2-* \
+	| none-* | np1-* | ns16k-* | ns32k-* \
+	| orion-* \
+	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
+	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* | ppcbe-* \
+	| pyramid-* \
+	| romp-* | rs6000-* | rx-* \
+	| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
+	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
+	| sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
+	| sparclite-* \
+	| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | strongarm-* | sv1-* | sx?-* \
+	| tahoe-* | thumb-* \
+	| tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
+	| tile-* | tilegx-* \
+	| tron-* \
+	| ubicom32-* \
+	| v850-* | v850e-* | vax-* \
+	| we32k-* \
+	| x86-* | x86_64-* | xc16x-* | xps100-* | xscale-* | xscalee[bl]-* \
+	| xstormy16-* | xtensa*-* \
+	| ymp-* \
+	| z8k-* | z80-*)
+		;;
+	# Recognize the basic CPU types without company name, with glob match.
+	xtensa*)
+		basic_machine=$basic_machine-unknown
+		;;
+	# Recognize the various machine names and aliases which stand
+	# for a CPU type and a company and sometimes even an OS.
+	386bsd)
+		basic_machine=i386-unknown
+		os=-bsd
+		;;
+	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
+		basic_machine=m68000-att
+		;;
+	3b*)
+		basic_machine=we32k-att
+		;;
+	a29khif)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+    	abacus)
+		basic_machine=abacus-unknown
+		;;
+	adobe68k)
+		basic_machine=m68010-adobe
+		os=-scout
+		;;
+	alliant | fx80)
+		basic_machine=fx80-alliant
+		;;
+	altos | altos3068)
+		basic_machine=m68k-altos
+		;;
+	am29k)
+		basic_machine=a29k-none
+		os=-bsd
+		;;
+	amd64)
+		basic_machine=x86_64-pc
+		;;
+	amd64-*)
+		basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	amdahl)
+		basic_machine=580-amdahl
+		os=-sysv
+		;;
+	amiga | amiga-*)
+		basic_machine=m68k-unknown
+		;;
+	amigaos | amigados)
+		basic_machine=m68k-unknown
+		os=-amigaos
+		;;
+	amigaunix | amix)
+		basic_machine=m68k-unknown
+		os=-sysv4
+		;;
+	apollo68)
+		basic_machine=m68k-apollo
+		os=-sysv
+		;;
+	apollo68bsd)
+		basic_machine=m68k-apollo
+		os=-bsd
+		;;
+	aros)
+		basic_machine=i386-pc
+		os=-aros
+		;;
+	aux)
+		basic_machine=m68k-apple
+		os=-aux
+		;;
+	balance)
+		basic_machine=ns32k-sequent
+		os=-dynix
+		;;
+	blackfin)
+		basic_machine=bfin-unknown
+		os=-linux
+		;;
+	blackfin-*)
+		basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	bluegene*)
+		basic_machine=powerpc-ibm
+		os=-cnk
+		;;
+	c90)
+		basic_machine=c90-cray
+		os=-unicos
+		;;
+        cegcc)
+		basic_machine=arm-unknown
+		os=-cegcc
+		;;
+	convex-c1)
+		basic_machine=c1-convex
+		os=-bsd
+		;;
+	convex-c2)
+		basic_machine=c2-convex
+		os=-bsd
+		;;
+	convex-c32)
+		basic_machine=c32-convex
+		os=-bsd
+		;;
+	convex-c34)
+		basic_machine=c34-convex
+		os=-bsd
+		;;
+	convex-c38)
+		basic_machine=c38-convex
+		os=-bsd
+		;;
+	cray | j90)
+		basic_machine=j90-cray
+		os=-unicos
+		;;
+	craynv)
+		basic_machine=craynv-cray
+		os=-unicosmp
+		;;
+	cr16)
+		basic_machine=cr16-unknown
+		os=-elf
+		;;
+	crds | unos)
+		basic_machine=m68k-crds
+		;;
+	crisv32 | crisv32-* | etraxfs*)
+		basic_machine=crisv32-axis
+		;;
+	cris | cris-* | etrax*)
+		basic_machine=cris-axis
+		;;
+	crx)
+		basic_machine=crx-unknown
+		os=-elf
+		;;
+	da30 | da30-*)
+		basic_machine=m68k-da30
+		;;
+	decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
+		basic_machine=mips-dec
+		;;
+	decsystem10* | dec10*)
+		basic_machine=pdp10-dec
+		os=-tops10
+		;;
+	decsystem20* | dec20*)
+		basic_machine=pdp10-dec
+		os=-tops20
+		;;
+	delta | 3300 | motorola-3300 | motorola-delta \
+	      | 3300-motorola | delta-motorola)
+		basic_machine=m68k-motorola
+		;;
+	delta88)
+		basic_machine=m88k-motorola
+		os=-sysv3
+		;;
+	dicos)
+		basic_machine=i686-pc
+		os=-dicos
+		;;
+	djgpp)
+		basic_machine=i586-pc
+		os=-msdosdjgpp
+		;;
+	dpx20 | dpx20-*)
+		basic_machine=rs6000-bull
+		os=-bosx
+		;;
+	dpx2* | dpx2*-bull)
+		basic_machine=m68k-bull
+		os=-sysv3
+		;;
+	ebmon29k)
+		basic_machine=a29k-amd
+		os=-ebmon
+		;;
+	elxsi)
+		basic_machine=elxsi-elxsi
+		os=-bsd
+		;;
+	encore | umax | mmax)
+		basic_machine=ns32k-encore
+		;;
+	es1800 | OSE68k | ose68k | ose | OSE)
+		basic_machine=m68k-ericsson
+		os=-ose
+		;;
+	fx2800)
+		basic_machine=i860-alliant
+		;;
+	genix)
+		basic_machine=ns32k-ns
+		;;
+	gmicro)
+		basic_machine=tron-gmicro
+		os=-sysv
+		;;
+	go32)
+		basic_machine=i386-pc
+		os=-go32
+		;;
+	h3050r* | hiux*)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	h8300hms)
+		basic_machine=h8300-hitachi
+		os=-hms
+		;;
+	h8300xray)
+		basic_machine=h8300-hitachi
+		os=-xray
+		;;
+	h8500hms)
+		basic_machine=h8500-hitachi
+		os=-hms
+		;;
+	harris)
+		basic_machine=m88k-harris
+		os=-sysv3
+		;;
+	hp300-*)
+		basic_machine=m68k-hp
+		;;
+	hp300bsd)
+		basic_machine=m68k-hp
+		os=-bsd
+		;;
+	hp300hpux)
+		basic_machine=m68k-hp
+		os=-hpux
+		;;
+	hp3k9[0-9][0-9] | hp9[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k2[0-9][0-9] | hp9k31[0-9])
+		basic_machine=m68000-hp
+		;;
+	hp9k3[2-9][0-9])
+		basic_machine=m68k-hp
+		;;
+	hp9k6[0-9][0-9] | hp6[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hp9k7[0-79][0-9] | hp7[0-79][0-9])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k78[0-9] | hp78[0-9])
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
+		# FIXME: really hppa2.0-hp
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][13679] | hp8[0-9][13679])
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][0-9] | hp8[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hppa-next)
+		os=-nextstep3
+		;;
+	hppaosf)
+		basic_machine=hppa1.1-hp
+		os=-osf
+		;;
+	hppro)
+		basic_machine=hppa1.1-hp
+		os=-proelf
+		;;
+	i370-ibm* | ibm*)
+		basic_machine=i370-ibm
+		;;
+# I'm not sure what "Sysv32" means.  Should this be sysv3.2?
+	i*86v32)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv32
+		;;
+	i*86v4*)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv4
+		;;
+	i*86v)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv
+		;;
+	i*86sol2)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-solaris2
+		;;
+	i386mach)
+		basic_machine=i386-mach
+		os=-mach
+		;;
+	i386-vsta | vsta)
+		basic_machine=i386-unknown
+		os=-vsta
+		;;
+	iris | iris4d)
+		basic_machine=mips-sgi
+		case $os in
+		    -irix*)
+			;;
+		    *)
+			os=-irix4
+			;;
+		esac
+		;;
+	isi68 | isi)
+		basic_machine=m68k-isi
+		os=-sysv
+		;;
+	m68knommu)
+		basic_machine=m68k-unknown
+		os=-linux
+		;;
+	m68knommu-*)
+		basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	m88k-omron*)
+		basic_machine=m88k-omron
+		;;
+	magnum | m3230)
+		basic_machine=mips-mips
+		os=-sysv
+		;;
+	merlin)
+		basic_machine=ns32k-utek
+		os=-sysv
+		;;
+        microblaze)
+		basic_machine=microblaze-xilinx
+		;;
+	mingw32)
+		basic_machine=i386-pc
+		os=-mingw32
+		;;
+	mingw32ce)
+		basic_machine=arm-unknown
+		os=-mingw32ce
+		;;
+	miniframe)
+		basic_machine=m68000-convergent
+		;;
+	*mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*)
+		basic_machine=m68k-atari
+		os=-mint
+		;;
+	mips3*-*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
+		;;
+	mips3*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
+		;;
+	monitor)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	morphos)
+		basic_machine=powerpc-unknown
+		os=-morphos
+		;;
+	msdos)
+		basic_machine=i386-pc
+		os=-msdos
+		;;
+	ms1-*)
+		basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'`
+		;;
+	mvs)
+		basic_machine=i370-ibm
+		os=-mvs
+		;;
+	ncr3000)
+		basic_machine=i486-ncr
+		os=-sysv4
+		;;
+	netbsd386)
+		basic_machine=i386-unknown
+		os=-netbsd
+		;;
+	netwinder)
+		basic_machine=armv4l-rebel
+		os=-linux
+		;;
+	news | news700 | news800 | news900)
+		basic_machine=m68k-sony
+		os=-newsos
+		;;
+	news1000)
+		basic_machine=m68030-sony
+		os=-newsos
+		;;
+	news-3600 | risc-news)
+		basic_machine=mips-sony
+		os=-newsos
+		;;
+	necv70)
+		basic_machine=v70-nec
+		os=-sysv
+		;;
+	next | m*-next )
+		basic_machine=m68k-next
+		case $os in
+		    -nextstep* )
+			;;
+		    -ns2*)
+		      os=-nextstep2
+			;;
+		    *)
+		      os=-nextstep3
+			;;
+		esac
+		;;
+	nh3000)
+		basic_machine=m68k-harris
+		os=-cxux
+		;;
+	nh[45]000)
+		basic_machine=m88k-harris
+		os=-cxux
+		;;
+	nindy960)
+		basic_machine=i960-intel
+		os=-nindy
+		;;
+	mon960)
+		basic_machine=i960-intel
+		os=-mon960
+		;;
+	nonstopux)
+		basic_machine=mips-compaq
+		os=-nonstopux
+		;;
+	np1)
+		basic_machine=np1-gould
+		;;
+	nsr-tandem)
+		basic_machine=nsr-tandem
+		;;
+	op50n-* | op60c-*)
+		basic_machine=hppa1.1-oki
+		os=-proelf
+		;;
+	openrisc | openrisc-*)
+		basic_machine=or32-unknown
+		;;
+	os400)
+		basic_machine=powerpc-ibm
+		os=-os400
+		;;
+	OSE68000 | ose68000)
+		basic_machine=m68000-ericsson
+		os=-ose
+		;;
+	os68k)
+		basic_machine=m68k-none
+		os=-os68k
+		;;
+	pa-hitachi)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	paragon)
+		basic_machine=i860-intel
+		os=-osf
+		;;
+	parisc)
+		basic_machine=hppa-unknown
+		os=-linux
+		;;
+	parisc-*)
+		basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'`
+		os=-linux
+		;;
+	pbd)
+		basic_machine=sparc-tti
+		;;
+	pbb)
+		basic_machine=m68k-tti
+		;;
+	pc532 | pc532-*)
+		basic_machine=ns32k-pc532
+		;;
+	pc98)
+		basic_machine=i386-pc
+		;;
+	pc98-*)
+		basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentium | p5 | k5 | k6 | nexgen | viac3)
+		basic_machine=i586-pc
+		;;
+	pentiumpro | p6 | 6x86 | athlon | athlon_*)
+		basic_machine=i686-pc
+		;;
+	pentiumii | pentium2 | pentiumiii | pentium3)
+		basic_machine=i686-pc
+		;;
+	pentium4)
+		basic_machine=i786-pc
+		;;
+	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
+		basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentiumpro-* | p6-* | 6x86-* | athlon-*)
+		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
+		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentium4-*)
+		basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pn)
+		basic_machine=pn-gould
+		;;
+	power)	basic_machine=power-ibm
+		;;
+	ppc)	basic_machine=powerpc-unknown
+		;;
+	ppc-*)	basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppcle | powerpclittle | ppc-le | powerpc-little)
+		basic_machine=powerpcle-unknown
+		;;
+	ppcle-* | powerpclittle-*)
+		basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppc64)	basic_machine=powerpc64-unknown
+		;;
+	ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppc64le | powerpc64little | ppc64-le | powerpc64-little)
+		basic_machine=powerpc64le-unknown
+		;;
+	ppc64le-* | powerpc64little-*)
+		basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ps2)
+		basic_machine=i386-ibm
+		;;
+	pw32)
+		basic_machine=i586-unknown
+		os=-pw32
+		;;
+	rdos)
+		basic_machine=i386-pc
+		os=-rdos
+		;;
+	rom68k)
+		basic_machine=m68k-rom68k
+		os=-coff
+		;;
+	rm[46]00)
+		basic_machine=mips-siemens
+		;;
+	rtpc | rtpc-*)
+		basic_machine=romp-ibm
+		;;
+	s390 | s390-*)
+		basic_machine=s390-ibm
+		;;
+	s390x | s390x-*)
+		basic_machine=s390x-ibm
+		;;
+	sa29200)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	sb1)
+		basic_machine=mipsisa64sb1-unknown
+		;;
+	sb1el)
+		basic_machine=mipsisa64sb1el-unknown
+		;;
+	sde)
+		basic_machine=mipsisa32-sde
+		os=-elf
+		;;
+	sei)
+		basic_machine=mips-sei
+		os=-seiux
+		;;
+	sequent)
+		basic_machine=i386-sequent
+		;;
+	sh)
+		basic_machine=sh-hitachi
+		os=-hms
+		;;
+	sh5el)
+		basic_machine=sh5le-unknown
+		;;
+	sh64)
+		basic_machine=sh64-unknown
+		;;
+	sparclite-wrs | simso-wrs)
+		basic_machine=sparclite-wrs
+		os=-vxworks
+		;;
+	sps7)
+		basic_machine=m68k-bull
+		os=-sysv2
+		;;
+	spur)
+		basic_machine=spur-unknown
+		;;
+	st2000)
+		basic_machine=m68k-tandem
+		;;
+	stratus)
+		basic_machine=i860-stratus
+		os=-sysv4
+		;;
+	sun2)
+		basic_machine=m68000-sun
+		;;
+	sun2os3)
+		basic_machine=m68000-sun
+		os=-sunos3
+		;;
+	sun2os4)
+		basic_machine=m68000-sun
+		os=-sunos4
+		;;
+	sun3os3)
+		basic_machine=m68k-sun
+		os=-sunos3
+		;;
+	sun3os4)
+		basic_machine=m68k-sun
+		os=-sunos4
+		;;
+	sun4os3)
+		basic_machine=sparc-sun
+		os=-sunos3
+		;;
+	sun4os4)
+		basic_machine=sparc-sun
+		os=-sunos4
+		;;
+	sun4sol2)
+		basic_machine=sparc-sun
+		os=-solaris2
+		;;
+	sun3 | sun3-*)
+		basic_machine=m68k-sun
+		;;
+	sun4)
+		basic_machine=sparc-sun
+		;;
+	sun386 | sun386i | roadrunner)
+		basic_machine=i386-sun
+		;;
+	sv1)
+		basic_machine=sv1-cray
+		os=-unicos
+		;;
+	symmetry)
+		basic_machine=i386-sequent
+		os=-dynix
+		;;
+	t3e)
+		basic_machine=alphaev5-cray
+		os=-unicos
+		;;
+	t90)
+		basic_machine=t90-cray
+		os=-unicos
+		;;
+	tic54x | c54x*)
+		basic_machine=tic54x-unknown
+		os=-coff
+		;;
+	tic55x | c55x*)
+		basic_machine=tic55x-unknown
+		os=-coff
+		;;
+	tic6x | c6x*)
+		basic_machine=tic6x-unknown
+		os=-coff
+		;;
+        # This must be matched before tile*.
+        tilegx*)
+		basic_machine=tilegx-unknown
+		os=-linux-gnu
+		;;
+	tile*)
+		basic_machine=tile-unknown
+		os=-linux-gnu
+		;;
+	tx39)
+		basic_machine=mipstx39-unknown
+		;;
+	tx39el)
+		basic_machine=mipstx39el-unknown
+		;;
+	toad1)
+		basic_machine=pdp10-xkl
+		os=-tops20
+		;;
+	tower | tower-32)
+		basic_machine=m68k-ncr
+		;;
+	tpf)
+		basic_machine=s390x-ibm
+		os=-tpf
+		;;
+	udi29k)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	ultra3)
+		basic_machine=a29k-nyu
+		os=-sym1
+		;;
+	v810 | necv810)
+		basic_machine=v810-nec
+		os=-none
+		;;
+	vaxv)
+		basic_machine=vax-dec
+		os=-sysv
+		;;
+	vms)
+		basic_machine=vax-dec
+		os=-vms
+		;;
+	vpp*|vx|vx-*)
+		basic_machine=f301-fujitsu
+		;;
+	vxworks960)
+		basic_machine=i960-wrs
+		os=-vxworks
+		;;
+	vxworks68)
+		basic_machine=m68k-wrs
+		os=-vxworks
+		;;
+	vxworks29k)
+		basic_machine=a29k-wrs
+		os=-vxworks
+		;;
+	w65*)
+		basic_machine=w65-wdc
+		os=-none
+		;;
+	w89k-*)
+		basic_machine=hppa1.1-winbond
+		os=-proelf
+		;;
+	xbox)
+		basic_machine=i686-pc
+		os=-mingw32
+		;;
+	xps | xps100)
+		basic_machine=xps100-honeywell
+		;;
+	ymp)
+		basic_machine=ymp-cray
+		os=-unicos
+		;;
+	z8k-*-coff)
+		basic_machine=z8k-unknown
+		os=-sim
+		;;
+	z80-*-coff)
+		basic_machine=z80-unknown
+		os=-sim
+		;;
+	none)
+		basic_machine=none-none
+		os=-none
+		;;
+
+# Here we handle the default manufacturer of certain CPU types.  It is in
+# some cases the only manufacturer, in others, it is the most popular.
+	w89k)
+		basic_machine=hppa1.1-winbond
+		;;
+	op50n)
+		basic_machine=hppa1.1-oki
+		;;
+	op60c)
+		basic_machine=hppa1.1-oki
+		;;
+	romp)
+		basic_machine=romp-ibm
+		;;
+	mmix)
+		basic_machine=mmix-knuth
+		;;
+	rs6000)
+		basic_machine=rs6000-ibm
+		;;
+	vax)
+		basic_machine=vax-dec
+		;;
+	pdp10)
+		# there are many clones, so DEC is not a safe bet
+		basic_machine=pdp10-unknown
+		;;
+	pdp11)
+		basic_machine=pdp11-dec
+		;;
+	we32k)
+		basic_machine=we32k-att
+		;;
+	sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
+		basic_machine=sh-unknown
+		;;
+	sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v)
+		basic_machine=sparc-sun
+		;;
+	cydra)
+		basic_machine=cydra-cydrome
+		;;
+	orion)
+		basic_machine=orion-highlevel
+		;;
+	orion105)
+		basic_machine=clipper-highlevel
+		;;
+	mac | mpw | mac-mpw)
+		basic_machine=m68k-apple
+		;;
+	pmac | pmac-mpw)
+		basic_machine=powerpc-apple
+		;;
+	*-unknown)
+		# Make sure to match an already-canonicalized machine name.
+		;;
+	*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+esac
+
+# Here we canonicalize certain aliases for manufacturers.
+case $basic_machine in
+	*-digital*)
+		basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
+		;;
+	*-commodore*)
+		basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
+		;;
+	*)
+		;;
+esac
+
+# Decode manufacturer-specific aliases for certain operating systems.
+
+if [ x"$os" != x"" ]
+then
+case $os in
+        # First match some system type aliases
+        # that might get confused with valid system types.
+	# -solaris* is a basic system type, with this one exception.
+        -auroraux)
+	        os=-auroraux
+		;;
+	-solaris1 | -solaris1.*)
+		os=`echo $os | sed -e 's|solaris1|sunos4|'`
+		;;
+	-solaris)
+		os=-solaris2
+		;;
+	-svr4*)
+		os=-sysv4
+		;;
+	-unixware*)
+		os=-sysv4.2uw
+		;;
+	-gnu/linux*)
+		os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
+		;;
+	# First accept the basic system types.
+	# The portable systems comes first.
+	# Each alternative MUST END IN A *, to match a version number.
+	# -sysv* is not here because it comes later, after sysvr4.
+	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
+	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
+	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
+	      | -sym* | -kopensolaris* \
+	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
+	      | -aos* | -aros* \
+	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
+	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
+	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
+	      | -openbsd* | -solidbsd* \
+	      | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
+	      | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
+	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
+	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
+	      | -chorusos* | -chorusrdb* | -cegcc* \
+	      | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+	      | -mingw32* | -linux-gnu* | -linux-newlib* | -linux-uclibc* \
+	      | -uxpv* | -beos* | -mpeix* | -udk* \
+	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
+	      | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
+	      | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
+	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
+	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
+	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
+	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es*)
+	# Remember, each alternative MUST END IN *, to match a version number.
+		;;
+	-qnx*)
+		case $basic_machine in
+		    x86-* | i*86-*)
+			;;
+		    *)
+			os=-nto$os
+			;;
+		esac
+		;;
+	-nto-qnx*)
+		;;
+	-nto*)
+		os=`echo $os | sed -e 's|nto|nto-qnx|'`
+		;;
+	-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
+	      | -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \
+	      | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
+		;;
+	-mac*)
+		os=`echo $os | sed -e 's|mac|macos|'`
+		;;
+	-linux-dietlibc)
+		os=-linux-dietlibc
+		;;
+	-linux*)
+		os=`echo $os | sed -e 's|linux|linux-gnu|'`
+		;;
+	-sunos5*)
+		os=`echo $os | sed -e 's|sunos5|solaris2|'`
+		;;
+	-sunos6*)
+		os=`echo $os | sed -e 's|sunos6|solaris3|'`
+		;;
+	-opened*)
+		os=-openedition
+		;;
+        -os400*)
+		os=-os400
+		;;
+	-wince*)
+		os=-wince
+		;;
+	-osfrose*)
+		os=-osfrose
+		;;
+	-osf*)
+		os=-osf
+		;;
+	-utek*)
+		os=-bsd
+		;;
+	-dynix*)
+		os=-bsd
+		;;
+	-acis*)
+		os=-aos
+		;;
+	-atheos*)
+		os=-atheos
+		;;
+	-syllable*)
+		os=-syllable
+		;;
+	-386bsd)
+		os=-bsd
+		;;
+	-ctix* | -uts*)
+		os=-sysv
+		;;
+	-nova*)
+		os=-rtmk-nova
+		;;
+	-ns2 )
+		os=-nextstep2
+		;;
+	-nsk*)
+		os=-nsk
+		;;
+	# Preserve the version number of sinix5.
+	-sinix5.*)
+		os=`echo $os | sed -e 's|sinix|sysv|'`
+		;;
+	-sinix*)
+		os=-sysv4
+		;;
+        -tpf*)
+		os=-tpf
+		;;
+	-triton*)
+		os=-sysv3
+		;;
+	-oss*)
+		os=-sysv3
+		;;
+	-svr4)
+		os=-sysv4
+		;;
+	-svr3)
+		os=-sysv3
+		;;
+	-sysvr4)
+		os=-sysv4
+		;;
+	# This must come after -sysvr4.
+	-sysv*)
+		;;
+	-ose*)
+		os=-ose
+		;;
+	-es1800*)
+		os=-ose
+		;;
+	-xenix)
+		os=-xenix
+		;;
+	-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+		os=-mint
+		;;
+	-aros*)
+		os=-aros
+		;;
+	-kaos*)
+		os=-kaos
+		;;
+	-zvmoe)
+		os=-zvmoe
+		;;
+	-dicos*)
+		os=-dicos
+		;;
+        -nacl*)
+	        ;;
+	-none)
+		;;
+	*)
+		# Get rid of the `-' at the beginning of $os.
+		os=`echo $os | sed 's/[^-]*-//'`
+		echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
+		exit 1
+		;;
+esac
+else
+
+# Here we handle the default operating systems that come with various machines.
+# The value should be what the vendor currently ships out the door with their
+# machine or put another way, the most popular os provided with the machine.
+
+# Note that if you're going to try to match "-MANUFACTURER" here (say,
+# "-sun"), then you have to tell the case statement up towards the top
+# that MANUFACTURER isn't an operating system.  Otherwise, code above
+# will signal an error saying that MANUFACTURER isn't an operating
+# system, and we'll never get to this point.
+
+case $basic_machine in
+        score-*)
+		os=-elf
+		;;
+        spu-*)
+		os=-elf
+		;;
+	*-acorn)
+		os=-riscix1.2
+		;;
+	arm*-rebel)
+		os=-linux
+		;;
+	arm*-semi)
+		os=-aout
+		;;
+        c4x-* | tic4x-*)
+        	os=-coff
+		;;
+	# This must come before the *-dec entry.
+	pdp10-*)
+		os=-tops20
+		;;
+	pdp11-*)
+		os=-none
+		;;
+	*-dec | vax-*)
+		os=-ultrix4.2
+		;;
+	m68*-apollo)
+		os=-domain
+		;;
+	i386-sun)
+		os=-sunos4.0.2
+		;;
+	m68000-sun)
+		os=-sunos3
+		# This also exists in the configure program, but was not the
+		# default.
+		# os=-sunos4
+		;;
+	m68*-cisco)
+		os=-aout
+		;;
+        mep-*)
+		os=-elf
+		;;
+	mips*-cisco)
+		os=-elf
+		;;
+	mips*-*)
+		os=-elf
+		;;
+	or32-*)
+		os=-coff
+		;;
+	*-tti)	# must be before sparc entry or we get the wrong os.
+		os=-sysv3
+		;;
+	sparc-* | *-sun)
+		os=-sunos4.1.1
+		;;
+	*-be)
+		os=-beos
+		;;
+	*-haiku)
+		os=-haiku
+		;;
+	*-ibm)
+		os=-aix
+		;;
+    	*-knuth)
+		os=-mmixware
+		;;
+	*-wec)
+		os=-proelf
+		;;
+	*-winbond)
+		os=-proelf
+		;;
+	*-oki)
+		os=-proelf
+		;;
+	*-hp)
+		os=-hpux
+		;;
+	*-hitachi)
+		os=-hiux
+		;;
+	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
+		os=-sysv
+		;;
+	*-cbm)
+		os=-amigaos
+		;;
+	*-dg)
+		os=-dgux
+		;;
+	*-dolphin)
+		os=-sysv3
+		;;
+	m68k-ccur)
+		os=-rtu
+		;;
+	m88k-omron*)
+		os=-luna
+		;;
+	*-next )
+		os=-nextstep
+		;;
+	*-sequent)
+		os=-ptx
+		;;
+	*-crds)
+		os=-unos
+		;;
+	*-ns)
+		os=-genix
+		;;
+	i370-*)
+		os=-mvs
+		;;
+	*-next)
+		os=-nextstep3
+		;;
+	*-gould)
+		os=-sysv
+		;;
+	*-highlevel)
+		os=-bsd
+		;;
+	*-encore)
+		os=-bsd
+		;;
+	*-sgi)
+		os=-irix
+		;;
+	*-siemens)
+		os=-sysv4
+		;;
+	*-masscomp)
+		os=-rtu
+		;;
+	f30[01]-fujitsu | f700-fujitsu)
+		os=-uxpv
+		;;
+	*-rom68k)
+		os=-coff
+		;;
+	*-*bug)
+		os=-coff
+		;;
+	*-apple)
+		os=-macos
+		;;
+	*-atari*)
+		os=-mint
+		;;
+	*)
+		os=-none
+		;;
+esac
+fi
+
+# Here we handle the case where we know the os, and the CPU type, but not the
+# manufacturer.  We pick the logical manufacturer.
+vendor=unknown
+case $basic_machine in
+	*-unknown)
+		case $os in
+			-riscix*)
+				vendor=acorn
+				;;
+			-sunos*)
+				vendor=sun
+				;;
+			-cnk*|-aix*)
+				vendor=ibm
+				;;
+			-beos*)
+				vendor=be
+				;;
+			-hpux*)
+				vendor=hp
+				;;
+			-mpeix*)
+				vendor=hp
+				;;
+			-hiux*)
+				vendor=hitachi
+				;;
+			-unos*)
+				vendor=crds
+				;;
+			-dgux*)
+				vendor=dg
+				;;
+			-luna*)
+				vendor=omron
+				;;
+			-genix*)
+				vendor=ns
+				;;
+			-mvs* | -opened*)
+				vendor=ibm
+				;;
+			-os400*)
+				vendor=ibm
+				;;
+			-ptx*)
+				vendor=sequent
+				;;
+			-tpf*)
+				vendor=ibm
+				;;
+			-vxsim* | -vxworks* | -windiss*)
+				vendor=wrs
+				;;
+			-aux*)
+				vendor=apple
+				;;
+			-hms*)
+				vendor=hitachi
+				;;
+			-mpw* | -macos*)
+				vendor=apple
+				;;
+			-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+				vendor=atari
+				;;
+			-vos*)
+				vendor=stratus
+				;;
+		esac
+		basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
+		;;
+esac
+
+echo $basic_machine$os
+exit
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "timestamp='"
+# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-end: "'"
+# End:
diff --git a/configure b/configure
new file mode 100755
index 0000000..5ee05a9
--- /dev/null
+++ b/configure
@@ -0,0 +1,15763 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.67 for knot 0.8.
+#
+# Report bugs to <knot-dns@labs.nic.cz>.
+#
+#
+# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
+# 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software
+# Foundation, Inc.
+#
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='printf %s\n'
+  as_echo_n='printf %s'
+else
+  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+    as_echo_n='/usr/ucb/echo -n'
+  else
+    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+    as_echo_n_body='eval
+      arg=$1;
+      case $arg in #(
+      *"$as_nl"*)
+	expr "X$arg" : "X\\(.*\\)$as_nl";
+	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+      esac;
+      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+    '
+    export as_echo_n_body
+    as_echo_n='sh -c $as_echo_n_body as_echo'
+  fi
+  export as_echo_body
+  as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" ""	$as_nl"
+
+# Find who we are.  Look in the path if we contain no directory separator.
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+if test "x$CONFIG_SHELL" = x; then
+  as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else
+  case \`(set -o) 2>/dev/null\` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+"
+  as_required="as_fn_return () { (exit \$1); }
+as_fn_success () { as_fn_return 0; }
+as_fn_failure () { as_fn_return 1; }
+as_fn_ret_success () { return 0; }
+as_fn_ret_failure () { return 1; }
+
+exitcode=0
+as_fn_success || { exitcode=1; echo as_fn_success failed.; }
+as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
+as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
+as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
+if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then :
+
+else
+  exitcode=1; echo positional parameters were not saved.
+fi
+test x\$exitcode = x0 || exit 1"
+  as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
+  as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
+  eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
+  test \"x\`expr \$as_lineno_1'\$as_run' + 1\`\" = \"x\$as_lineno_2'\$as_run'\"' || exit 1
+test \$(( 1 + 1 )) = 2 || exit 1"
+  if (eval "$as_required") 2>/dev/null; then :
+  as_have_required=yes
+else
+  as_have_required=no
+fi
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then :
+
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  as_found=:
+  case $as_dir in #(
+	 /*)
+	   for as_base in sh bash ksh sh5; do
+	     # Try only shells that exist, to save several forks.
+	     as_shell=$as_dir/$as_base
+	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+		    { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  CONFIG_SHELL=$as_shell as_have_required=yes
+		   if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then :
+  break 2
+fi
+fi
+	   done;;
+       esac
+  as_found=false
+done
+$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi; }
+IFS=$as_save_IFS
+
+
+      if test "x$CONFIG_SHELL" != x; then :
+  # We cannot yet assume a decent shell, so we have to provide a
+	# neutralization value for shells without unset; and this also
+	# works around shells that cannot unset nonexistent variables.
+	BASH_ENV=/dev/null
+	ENV=/dev/null
+	(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+	export CONFIG_SHELL
+	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
+fi
+
+    if test x$as_have_required = xno; then :
+  $as_echo "$0: This script requires a shell more modern than all"
+  $as_echo "$0: the shells that I found on your system."
+  if test x${ZSH_VERSION+set} = xset ; then
+    $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    $as_echo "$0: be upgraded to zsh 4.3.4 or later."
+  else
+    $as_echo "$0: Please tell bug-autoconf@gnu.org and
+$0: knot-dns@labs.nic.cz about your system, including any
+$0: error possibly output before this message. Then install
+$0: a modern shell, or manually run the script under such a
+$0: shell if you do have one."
+  fi
+  exit 1
+fi
+fi
+fi
+SHELL=${CONFIG_SHELL-/bin/sh}
+export SHELL
+# Unset more variables known to interfere with behavior of common tools.
+CLICOLOR_FORCE= GREP_OPTIONS=
+unset CLICOLOR_FORCE GREP_OPTIONS
+
+## --------------------- ##
+## M4sh Shell Functions. ##
+## --------------------- ##
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+
+  as_lineno_1=$LINENO as_lineno_1a=$LINENO
+  as_lineno_2=$LINENO as_lineno_2a=$LINENO
+  eval 'test "x$as_lineno_1'$as_run'" != "x$as_lineno_2'$as_run'" &&
+  test "x`expr $as_lineno_1'$as_run' + 1`" = "x$as_lineno_2'$as_run'"' || {
+  # Blame Lee E. McMahon (1931-1989) for sed's syntax.  :-)
+  sed -n '
+    p
+    /[$]LINENO/=
+  ' <$as_myself |
+    sed '
+      s/[$]LINENO.*/&-/
+      t lineno
+      b
+      :lineno
+      N
+      :loop
+      s/[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\)/\2\1\2/
+      t loop
+      s/-\n.*//
+    ' >$as_me.lineno &&
+  chmod +x "$as_me.lineno" ||
+    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensitive to this).
+  . "./$as_me.lineno"
+  # Exit status is that of the last command.
+  exit
+}
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -p'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -p'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -p'
+  fi
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+if test -x / >/dev/null 2>&1; then
+  as_test_x='test -x'
+else
+  if ls -dL / >/dev/null 2>&1; then
+    as_ls_L_option=L
+  else
+    as_ls_L_option=
+  fi
+  as_test_x='
+    eval sh -c '\''
+      if test -d "$1"; then
+	test -d "$1/.";
+      else
+	case $1 in #(
+	-*)set "./$1";;
+	esac;
+	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in #((
+	???[sx]*):;;*)false;;esac;fi
+    '\'' sh
+  '
+fi
+as_executable_p=$as_test_x
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+
+# Check that we are running under the correct shell.
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+case X$lt_ECHO in
+X*--fallback-echo)
+  # Remove one level of quotation (which was required for Make).
+  ECHO=`echo "$lt_ECHO" | sed 's,\\\\\$\\$0,'$0','`
+  ;;
+esac
+
+ECHO=${lt_ECHO-echo}
+if test "X$1" = X--no-reexec; then
+  # Discard the --no-reexec flag, and continue.
+  shift
+elif test "X$1" = X--fallback-echo; then
+  # Avoid inline document here, it may be left over
+  :
+elif test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' ; then
+  # Yippee, $ECHO works!
+  :
+else
+  # Restart under the correct shell.
+  exec $SHELL "$0" --no-reexec ${1+"$@"}
+fi
+
+if test "X$1" = X--fallback-echo; then
+  # used as fallback echo
+  shift
+  cat <<_LT_EOF
+$*
+_LT_EOF
+  exit 0
+fi
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+if test -z "$lt_ECHO"; then
+  if test "X${echo_test_string+set}" != Xset; then
+    # find a string as large as possible, as long as the shell can cope with it
+    for cmd in 'sed 50q "$0"' 'sed 20q "$0"' 'sed 10q "$0"' 'sed 2q "$0"' 'echo test'; do
+      # expected sizes: less than 2Kb, 1Kb, 512 bytes, 16 bytes, ...
+      if { echo_test_string=`eval $cmd`; } 2>/dev/null &&
+	 { test "X$echo_test_string" = "X$echo_test_string"; } 2>/dev/null
+      then
+        break
+      fi
+    done
+  fi
+
+  if test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' &&
+     echo_testing_string=`{ $ECHO "$echo_test_string"; } 2>/dev/null` &&
+     test "X$echo_testing_string" = "X$echo_test_string"; then
+    :
+  else
+    # The Solaris, AIX, and Digital Unix default echo programs unquote
+    # backslashes.  This makes it impossible to quote backslashes using
+    #   echo "$something" | sed 's/\\/\\\\/g'
+    #
+    # So, first we look for a working echo in the user's PATH.
+
+    lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+    for dir in $PATH /usr/ucb; do
+      IFS="$lt_save_ifs"
+      if (test -f $dir/echo || test -f $dir/echo$ac_exeext) &&
+         test "X`($dir/echo '\t') 2>/dev/null`" = 'X\t' &&
+         echo_testing_string=`($dir/echo "$echo_test_string") 2>/dev/null` &&
+         test "X$echo_testing_string" = "X$echo_test_string"; then
+        ECHO="$dir/echo"
+        break
+      fi
+    done
+    IFS="$lt_save_ifs"
+
+    if test "X$ECHO" = Xecho; then
+      # We didn't find a better echo, so look for alternatives.
+      if test "X`{ print -r '\t'; } 2>/dev/null`" = 'X\t' &&
+         echo_testing_string=`{ print -r "$echo_test_string"; } 2>/dev/null` &&
+         test "X$echo_testing_string" = "X$echo_test_string"; then
+        # This shell has a builtin print -r that does the trick.
+        ECHO='print -r'
+      elif { test -f /bin/ksh || test -f /bin/ksh$ac_exeext; } &&
+	   test "X$CONFIG_SHELL" != X/bin/ksh; then
+        # If we have ksh, try running configure again with it.
+        ORIGINAL_CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+        export ORIGINAL_CONFIG_SHELL
+        CONFIG_SHELL=/bin/ksh
+        export CONFIG_SHELL
+        exec $CONFIG_SHELL "$0" --no-reexec ${1+"$@"}
+      else
+        # Try using printf.
+        ECHO='printf %s\n'
+        if test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' &&
+	   echo_testing_string=`{ $ECHO "$echo_test_string"; } 2>/dev/null` &&
+	   test "X$echo_testing_string" = "X$echo_test_string"; then
+	  # Cool, printf works
+	  :
+        elif echo_testing_string=`($ORIGINAL_CONFIG_SHELL "$0" --fallback-echo '\t') 2>/dev/null` &&
+	     test "X$echo_testing_string" = 'X\t' &&
+	     echo_testing_string=`($ORIGINAL_CONFIG_SHELL "$0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	     test "X$echo_testing_string" = "X$echo_test_string"; then
+	  CONFIG_SHELL=$ORIGINAL_CONFIG_SHELL
+	  export CONFIG_SHELL
+	  SHELL="$CONFIG_SHELL"
+	  export SHELL
+	  ECHO="$CONFIG_SHELL $0 --fallback-echo"
+        elif echo_testing_string=`($CONFIG_SHELL "$0" --fallback-echo '\t') 2>/dev/null` &&
+	     test "X$echo_testing_string" = 'X\t' &&
+	     echo_testing_string=`($CONFIG_SHELL "$0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	     test "X$echo_testing_string" = "X$echo_test_string"; then
+	  ECHO="$CONFIG_SHELL $0 --fallback-echo"
+        else
+	  # maybe with a smaller string...
+	  prev=:
+
+	  for cmd in 'echo test' 'sed 2q "$0"' 'sed 10q "$0"' 'sed 20q "$0"' 'sed 50q "$0"'; do
+	    if { test "X$echo_test_string" = "X`eval $cmd`"; } 2>/dev/null
+	    then
+	      break
+	    fi
+	    prev="$cmd"
+	  done
+
+	  if test "$prev" != 'sed 50q "$0"'; then
+	    echo_test_string=`eval $prev`
+	    export echo_test_string
+	    exec ${ORIGINAL_CONFIG_SHELL-${CONFIG_SHELL-/bin/sh}} "$0" ${1+"$@"}
+	  else
+	    # Oops.  We lost completely, so just stick with echo.
+	    ECHO=echo
+	  fi
+        fi
+      fi
+    fi
+  fi
+fi
+
+# Copy echo and quote the copy suitably for passing to libtool from
+# the Makefile, instead of quoting the original, which is used later.
+lt_ECHO=$ECHO
+if test "X$lt_ECHO" = "X$CONFIG_SHELL $0 --fallback-echo"; then
+   lt_ECHO="$CONFIG_SHELL \\\$\$0 --fallback-echo"
+fi
+
+
+
+
+test -n "$DJDIR" || exec 7<&0 </dev/null
+exec 6>&1
+
+# Name of the host.
+# hostname on some systems (SVR3.2, old GNU/Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_clean_files=
+ac_config_libobj_dir=.
+LIBOBJS=
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+
+# Identity of this package.
+PACKAGE_NAME='knot'
+PACKAGE_TARNAME='knot'
+PACKAGE_VERSION='0.8'
+PACKAGE_STRING='knot 0.8'
+PACKAGE_BUGREPORT='knot-dns@labs.nic.cz'
+PACKAGE_URL=''
+
+ac_unique_file="src/knot/main.c"
+# Factoring default headers for most tests.
+ac_includes_default="\
+#include <stdio.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif
+#ifdef HAVE_STRING_H
+# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif"
+
+ac_header_list=
+ac_subst_vars='am__EXEEXT_FALSE
+am__EXEEXT_TRUE
+LTLIBOBJS
+LIBOBJS
+YFLAGS
+YACC
+LEXLIB
+LEX_OUTPUT_ROOT
+LEX
+OTOOL64
+OTOOL
+LIPO
+NMEDIT
+DSYMUTIL
+lt_ECHO
+RANLIB
+AR
+OBJDUMP
+LN_S
+NM
+ac_ct_DUMPBIN
+DUMPBIN
+LD
+FGREP
+SED
+host_os
+host_vendor
+host_cpu
+host
+build_os
+build_vendor
+build_cpu
+build
+LIBTOOL
+MAINT
+MAINTAINER_MODE_FALSE
+MAINTAINER_MODE_TRUE
+SIMD_FLAGS
+EGREP
+GREP
+CPP
+am__fastdepCC_FALSE
+am__fastdepCC_TRUE
+CCDEPMODE
+AMDEPBACKSLASH
+AMDEP_FALSE
+AMDEP_TRUE
+am__quote
+am__include
+DEPDIR
+OBJEXT
+EXEEXT
+ac_ct_CC
+CPPFLAGS
+LDFLAGS
+CFLAGS
+CC
+am__untar
+am__tar
+AMTAR
+am__leading_dot
+SET_MAKE
+AWK
+mkdir_p
+MKDIR_P
+INSTALL_STRIP_PROGRAM
+STRIP
+install_sh
+MAKEINFO
+AUTOHEADER
+AUTOMAKE
+AUTOCONF
+ACLOCAL
+VERSION
+PACKAGE
+CYGPATH_W
+am__isrc
+INSTALL_DATA
+INSTALL_SCRIPT
+INSTALL_PROGRAM
+target_alias
+host_alias
+build_alias
+LIBS
+ECHO_T
+ECHO_N
+ECHO_C
+DEFS
+mandir
+localedir
+libdir
+psdir
+pdfdir
+dvidir
+htmldir
+infodir
+docdir
+oldincludedir
+includedir
+localstatedir
+sharedstatedir
+sysconfdir
+datadir
+datarootdir
+libexecdir
+sbindir
+bindir
+program_transform_name
+prefix
+exec_prefix
+PACKAGE_URL
+PACKAGE_BUGREPORT
+PACKAGE_STRING
+PACKAGE_VERSION
+PACKAGE_TARNAME
+PACKAGE_NAME
+PATH_SEPARATOR
+SHELL'
+ac_subst_files=''
+ac_user_opts='
+enable_option_checking
+enable_dependency_tracking
+enable_maintainer_mode
+enable_shared
+enable_static
+with_pic
+enable_fast_install
+with_gnu_ld
+enable_libtool_lock
+enable_ldns
+enable_debug
+enable_recvmmsg
+'
+      ac_precious_vars='build_alias
+host_alias
+target_alias
+CC
+CFLAGS
+LDFLAGS
+LIBS
+CPPFLAGS
+CPP
+YACC
+YFLAGS'
+
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+ac_unrecognized_opts=
+ac_unrecognized_sep=
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+# (The list follows the same order as the GNU Coding Standards.)
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datarootdir='${prefix}/share'
+datadir='${datarootdir}'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
+infodir='${datarootdir}/info'
+htmldir='${docdir}'
+dvidir='${docdir}'
+pdfdir='${docdir}'
+psdir='${docdir}'
+libdir='${exec_prefix}/lib'
+localedir='${datarootdir}/locale'
+mandir='${datarootdir}/man'
+
+ac_prev=
+ac_dashdash=
+for ac_option
+do
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval $ac_prev=\$ac_option
+    ac_prev=
+    continue
+  fi
+
+  case $ac_option in
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
+  esac
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case $ac_dashdash$ac_option in
+  --)
+    ac_dashdash=yes ;;
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir=$ac_optarg ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build_alias ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build_alias=$ac_optarg ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file=$ac_optarg ;;
+
+  --config-cache | -C)
+    cache_file=config.cache ;;
+
+  -datadir | --datadir | --datadi | --datad)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=*)
+    datadir=$ac_optarg ;;
+
+  -datarootdir | --datarootdir | --datarootdi | --datarootd | --dataroot \
+  | --dataroo | --dataro | --datar)
+    ac_prev=datarootdir ;;
+  -datarootdir=* | --datarootdir=* | --datarootdi=* | --datarootd=* \
+  | --dataroot=* | --dataroo=* | --dataro=* | --datar=*)
+    datarootdir=$ac_optarg ;;
+
+  -disable-* | --disable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--disable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=no ;;
+
+  -docdir | --docdir | --docdi | --doc | --do)
+    ac_prev=docdir ;;
+  -docdir=* | --docdir=* | --docdi=* | --doc=* | --do=*)
+    docdir=$ac_optarg ;;
+
+  -dvidir | --dvidir | --dvidi | --dvid | --dvi | --dv)
+    ac_prev=dvidir ;;
+  -dvidir=* | --dvidir=* | --dvidi=* | --dvid=* | --dvi=* | --dv=*)
+    dvidir=$ac_optarg ;;
+
+  -enable-* | --enable-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid feature name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"enable_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--enable-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval enable_$ac_useropt=\$ac_optarg ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix=$ac_optarg ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he | -h)
+    ac_init_help=long ;;
+  -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
+    ac_init_help=recursive ;;
+  -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
+    ac_init_help=short ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host_alias ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host_alias=$ac_optarg ;;
+
+  -htmldir | --htmldir | --htmldi | --htmld | --html | --htm | --ht)
+    ac_prev=htmldir ;;
+  -htmldir=* | --htmldir=* | --htmldi=* | --htmld=* | --html=* | --htm=* \
+  | --ht=*)
+    htmldir=$ac_optarg ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir=$ac_optarg ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir=$ac_optarg ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir=$ac_optarg ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir=$ac_optarg ;;
+
+  -localedir | --localedir | --localedi | --localed | --locale)
+    ac_prev=localedir ;;
+  -localedir=* | --localedir=* | --localedi=* | --localed=* | --locale=*)
+    localedir=$ac_optarg ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst | --locals)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* | --locals=*)
+    localstatedir=$ac_optarg ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir=$ac_optarg ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c | -n)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -pdfdir | --pdfdir | --pdfdi | --pdfd | --pdf | --pd)
+    ac_prev=pdfdir ;;
+  -pdfdir=* | --pdfdir=* | --pdfdi=* | --pdfd=* | --pdf=* | --pd=*)
+    pdfdir=$ac_optarg ;;
+
+  -psdir | --psdir | --psdi | --psd | --ps)
+    ac_prev=psdir ;;
+  -psdir=* | --psdir=* | --psdi=* | --psd=* | --ps=*)
+    psdir=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--with-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=\$ac_optarg ;;
+
+  -without-* | --without-*)
+    ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
+      as_fn_error $? "invalid package name: $ac_useropt"
+    ac_useropt_orig=$ac_useropt
+    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    case $ac_user_opts in
+      *"
+"with_$ac_useropt"
+"*) ;;
+      *) ac_unrecognized_opts="$ac_unrecognized_opts$ac_unrecognized_sep--without-$ac_useropt_orig"
+	 ac_unrecognized_sep=', ';;
+    esac
+    eval with_$ac_useropt=no ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) as_fn_error $? "unrecognized option: \`$ac_option'
+Try \`$0 --help' for more information"
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    case $ac_envvar in #(
+      '' | [0-9]* | *[!_$as_cr_alnum]* )
+      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+    esac
+    eval $ac_envvar=\$ac_optarg
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  as_fn_error $? "missing argument to $ac_option"
+fi
+
+if test -n "$ac_unrecognized_opts"; then
+  case $enable_option_checking in
+    no) ;;
+    fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
+    *)     $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+  esac
+fi
+
+# Check all directory arguments for consistency.
+for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
+		datadir sysconfdir sharedstatedir localstatedir includedir \
+		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
+		libdir localedir mandir
+do
+  eval ac_val=\$$ac_var
+  # Remove trailing slashes.
+  case $ac_val in
+    */ )
+      ac_val=`expr "X$ac_val" : 'X\(.*[^/]\)' \| "X$ac_val" : 'X\(.*\)'`
+      eval $ac_var=\$ac_val;;
+  esac
+  # Be sure to have absolute directory names.
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* )  continue;;
+    NONE | '' ) case $ac_var in *prefix ) continue;; esac;;
+  esac
+  as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+    $as_echo "$as_me: WARNING: if you wanted to set the --build type, don't use --host.
+    If a cross compiler is detected then cross compile mode will be used" >&2
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+ac_pwd=`pwd` && test -n "$ac_pwd" &&
+ac_ls_di=`ls -di .` &&
+ac_pwd_ls_di=`cd "$ac_pwd" && ls -di .` ||
+  as_fn_error $? "working directory cannot be determined"
+test "X$ac_ls_di" = "X$ac_pwd_ls_di" ||
+  as_fn_error $? "pwd does not report name of working directory"
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then the parent directory.
+  ac_confdir=`$as_dirname -- "$as_myself" ||
+$as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_myself" : 'X\(//\)[^/]' \| \
+	 X"$as_myself" : 'X\(//\)$' \| \
+	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_myself" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r "$srcdir/$ac_unique_file"; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r "$srcdir/$ac_unique_file"; then
+  test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
+  as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
+fi
+ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_abs_confdir=`(
+	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
+	pwd)`
+# When building in place, set srcdir=.
+if test "$ac_abs_confdir" = "$ac_pwd"; then
+  srcdir=.
+fi
+# Remove unnecessary trailing slashes from srcdir.
+# Double slashes in file names in object file debugging info
+# mess up M-x gdb in Emacs.
+case $srcdir in
+*/) srcdir=`expr "X$srcdir" : 'X\(.*[^/]\)' \| "X$srcdir" : 'X\(.*\)'`;;
+esac
+for ac_var in $ac_precious_vars; do
+  eval ac_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_env_${ac_var}_value=\$${ac_var}
+  eval ac_cv_env_${ac_var}_set=\${${ac_var}+set}
+  eval ac_cv_env_${ac_var}_value=\$${ac_var}
+done
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures knot 0.8 to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking ...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR            user executables [EPREFIX/bin]
+  --sbindir=DIR           system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR        program executables [EPREFIX/libexec]
+  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --libdir=DIR            object code libraries [EPREFIX/lib]
+  --includedir=DIR        C header files [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
+  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
+  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
+  --infodir=DIR           info documentation [DATAROOTDIR/info]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
+  --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/knot]
+  --htmldir=DIR           html documentation [DOCDIR]
+  --dvidir=DIR            dvi documentation [DOCDIR]
+  --pdfdir=DIR            pdf documentation [DOCDIR]
+  --psdir=DIR             ps documentation [DOCDIR]
+_ACEOF
+
+  cat <<\_ACEOF
+
+Program names:
+  --program-prefix=PREFIX            prepend PREFIX to installed program names
+  --program-suffix=SUFFIX            append SUFFIX to installed program names
+  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names
+
+System types:
+  --build=BUILD     configure for building on BUILD [guessed]
+  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+  case $ac_init_help in
+     short | recursive ) echo "Configuration of knot 0.8:";;
+   esac
+  cat <<\_ACEOF
+
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --disable-dependency-tracking  speeds up one-time build
+  --enable-dependency-tracking   do not reject slow dependency extractors
+  --disable-maintainer-mode  disable make rules and dependencies not useful
+			  (and sometimes confusing) to the casual installer
+  --enable-shared[=PKGS]  build shared libraries [default=yes]
+  --enable-static[=PKGS]  build static libraries [default=yes]
+  --enable-fast-install[=PKGS]
+                          optimize for fast installation [default=yes]
+  --disable-libtool-lock  avoid locking (might break parallel builds)
+  --enable-ldns=yes|no    Enable tests with ldns [default=no]
+  --enable-debug=brief|verbose|details
+                          enable given debug level [default=disabled]
+  --enable-recvmmsg=yes|no
+                          enable recvmmsg() network API under Linux (kernel
+                          support required) (set to 'no' if you have trouble
+                          running server under valgrind) [default=yes]
+
+Optional Packages:
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-pic              try to use only PIC/non-PIC objects [default=use
+                          both]
+  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
+
+Some influential environment variables:
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  LIBS        libraries to pass to the linker, e.g. -l<library>
+  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
+              you have headers in a nonstandard directory <include dir>
+  CPP         C preprocessor
+  YACC        The `Yet Another C Compiler' implementation to use. Defaults to
+              the first program found out of: `bison -y', `byacc', `yacc'.
+  YFLAGS      The list of arguments that will be passed by default to $YACC.
+              This script will default YFLAGS to the empty string to avoid a
+              default value of `-d' given by some make applications.
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+Report bugs to <knot-dns@labs.nic.cz>.
+_ACEOF
+ac_status=$?
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d "$ac_dir" ||
+      { cd "$srcdir" && ac_pwd=`pwd` && srcdir=. && test -d "$ac_dir"; } ||
+      continue
+    ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+    cd "$ac_dir" || { ac_status=$?; continue; }
+    # Check for guested configure.
+    if test -f "$ac_srcdir/configure.gnu"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure.gnu" --help=recursive
+    elif test -f "$ac_srcdir/configure"; then
+      echo &&
+      $SHELL "$ac_srcdir/configure" --help=recursive
+    else
+      $as_echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi || ac_status=$?
+    cd "$ac_pwd" || { ac_status=$?; break; }
+  done
+fi
+
+test -n "$ac_init_help" && exit $ac_status
+if $ac_init_version; then
+  cat <<\_ACEOF
+knot configure 0.8
+generated by GNU Autoconf 2.67
+
+Copyright (C) 2010 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit
+fi
+
+## ------------------------ ##
+## Autoconf initialization. ##
+## ------------------------ ##
+
+# ac_fn_c_try_compile LINENO
+# --------------------------
+# Try to compile conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext
+  if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_compile
+
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists, giving a warning if it cannot be compiled using
+# the include files in INCLUDES and setting the cache variable VAR
+# accordingly.
+ac_fn_c_check_header_mongrel ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if eval "test \"\${$3+set}\"" = set; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
+$as_echo_n "checking $2 usability... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_header_compiler=yes
+else
+  ac_header_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
+$as_echo_n "checking $2 presence... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <$2>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  ac_header_preproc=yes
+else
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
+  yes:no: )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+    ;;
+  no:yes:* )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+( $as_echo "## ----------------------------------- ##
+## Report this to knot-dns@labs.nic.cz ##
+## ----------------------------------- ##"
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=\$ac_header_compiler"
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+fi
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_header_mongrel
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
+# that executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+       $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
+# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
+# -------------------------------------------------------
+# Tests whether HEADER exists and can be compiled using the include files in
+# INCLUDES, setting the cache variable VAR accordingly.
+ac_fn_c_check_header_compile ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_header_compile
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 $as_test_x conftest$ac_exeext
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
+
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $2 (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
+int
+main ()
+{
+return $2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$3=yes"
+else
+  eval "$3=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_func
+
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=no"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof ($2))
+	 return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main ()
+{
+if (sizeof (($2)))
+	    return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  eval "$3=yes"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_check_type
+
+# ac_fn_c_find_intX_t LINENO BITS VAR
+# -----------------------------------
+# Finds a signed integer type with width BITS, setting cache variable VAR
+# accordingly.
+ac_fn_c_find_intX_t ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for int$2_t" >&5
+$as_echo_n "checking for int$2_t... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=no"
+     # Order is important - never check a type that is potentially smaller
+     # than half of the expected target width.
+     for ac_type in int$2_t 'int' 'long int' \
+	 'long long int' 'short int' 'signed char'; do
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+	     enum { N = $2 / 2 - 1 };
+int
+main ()
+{
+static int test_array [1 - 2 * !(0 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1))];
+test_array [0] = 0
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+	        enum { N = $2 / 2 - 1 };
+int
+main ()
+{
+static int test_array [1 - 2 * !(($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 1)
+		 < ($ac_type) ((((($ac_type) 1 << N) << N) - 1) * 2 + 2))];
+test_array [0] = 0
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  case $ac_type in #(
+  int$2_t) :
+    eval "$3=yes" ;; #(
+  *) :
+    eval "$3=\$ac_type" ;;
+esac
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+       if eval test \"x\$"$3"\" = x"no"; then :
+
+else
+  break
+fi
+     done
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_find_intX_t
+
+# ac_fn_c_find_uintX_t LINENO BITS VAR
+# ------------------------------------
+# Finds an unsigned integer type with width BITS, setting cache variable VAR
+# accordingly.
+ac_fn_c_find_uintX_t ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for uint$2_t" >&5
+$as_echo_n "checking for uint$2_t... " >&6; }
+if eval "test \"\${$3+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=no"
+     # Order is important - never check a type that is potentially smaller
+     # than half of the expected target width.
+     for ac_type in uint$2_t 'unsigned int' 'unsigned long int' \
+	 'unsigned long long int' 'unsigned short int' 'unsigned char'; do
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main ()
+{
+static int test_array [1 - 2 * !((($ac_type) -1 >> ($2 / 2 - 1)) >> ($2 / 2 - 1) == 3)];
+test_array [0] = 0
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  case $ac_type in #(
+  uint$2_t) :
+    eval "$3=yes" ;; #(
+  *) :
+    eval "$3=\$ac_type" ;;
+esac
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+       if eval test \"x\$"$3"\" = x"no"; then :
+
+else
+  break
+fi
+     done
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+
+} # ac_fn_c_find_uintX_t
+cat >config.log <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by knot $as_me 0.8, which was
+generated by GNU Autoconf 2.67.  Invocation command line was
+
+  $ $0 $@
+
+_ACEOF
+exec 5>>config.log
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+/usr/bin/hostinfo      = `(/usr/bin/hostinfo) 2>/dev/null      || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    $as_echo "PATH: $as_dir"
+  done
+IFS=$as_save_IFS
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *\'*)
+      ac_arg=`$as_echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
+    2)
+      as_fn_append ac_configure_args1 " '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+	ac_must_keep_next=false # Got value, back to normal.
+      else
+	case $ac_arg in
+	  *=* | --config-cache | -C | -disable-* | --disable-* \
+	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+	  | -with-* | --with-* | -without-* | --without-* | --x)
+	    case "$ac_configure_args0 " in
+	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+	    esac
+	    ;;
+	  -* ) ac_must_keep_next=true ;;
+	esac
+      fi
+      as_fn_append ac_configure_args " '$ac_arg'"
+      ;;
+    esac
+  done
+done
+{ ac_configure_args0=; unset ac_configure_args0;}
+{ ac_configure_args1=; unset ac_configure_args1;}
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Use '\'' to represent an apostrophe within the trap.
+# WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
+trap 'exit_status=$?
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    $as_echo "## ---------------- ##
+## Cache variables. ##
+## ---------------- ##"
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+(
+  for ac_var in `(set) 2>&1 | sed -n '\''s/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'\''`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+  (set) 2>&1 |
+    case $as_nl`(ac_space='\'' '\''; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      sed -n \
+	"s/'\''/'\''\\\\'\'''\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\''\\2'\''/p"
+      ;; #(
+    *)
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+)
+    echo
+
+    $as_echo "## ----------------- ##
+## Output variables. ##
+## ----------------- ##"
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=\$$ac_var
+      case $ac_val in
+      *\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      esac
+      $as_echo "$ac_var='\''$ac_val'\''"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      $as_echo "## ------------------- ##
+## File substitutions. ##
+## ------------------- ##"
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=\$$ac_var
+	case $ac_val in
+	*\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+	esac
+	$as_echo "$ac_var='\''$ac_val'\''"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      $as_echo "## ----------- ##
+## confdefs.h. ##
+## ----------- ##"
+      echo
+      cat confdefs.h
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      $as_echo "$as_me: caught signal $ac_signal"
+    $as_echo "$as_me: exit $exit_status"
+  } >&5
+  rm -f core *.core core.conftest.* &&
+    rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; as_fn_exit 1' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -f -r conftest* confdefs.h
+
+$as_echo "/* confdefs.h */" > confdefs.h
+
+# Predefined preprocessor variables.
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_NAME "$PACKAGE_NAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_STRING "$PACKAGE_STRING"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+_ACEOF
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_URL "$PACKAGE_URL"
+_ACEOF
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer an explicitly selected file to automatically selected ones.
+ac_site_file1=NONE
+ac_site_file2=NONE
+if test -n "$CONFIG_SITE"; then
+  # We do not want a PATH search for config.site.
+  case $CONFIG_SITE in #((
+    -*)  ac_site_file1=./$CONFIG_SITE;;
+    */*) ac_site_file1=$CONFIG_SITE;;
+    *)   ac_site_file1=./$CONFIG_SITE;;
+  esac
+elif test "x$prefix" != xNONE; then
+  ac_site_file1=$prefix/share/config.site
+  ac_site_file2=$prefix/etc/config.site
+else
+  ac_site_file1=$ac_default_prefix/share/config.site
+  ac_site_file2=$ac_default_prefix/etc/config.site
+fi
+for ac_site_file in "$ac_site_file1" "$ac_site_file2"
+do
+  test "x$ac_site_file" = xNONE && continue
+  if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+$as_echo "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file" \
+      || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "failed to load site script $ac_site_file
+See \`config.log' for more details" "$LINENO" 5 ; }
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special files
+  # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
+  if test /dev/null != "$cache_file" && test -f "$cache_file"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+$as_echo "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . "$cache_file";;
+      *)                      . "./$cache_file";;
+    esac
+  fi
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+$as_echo "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+as_fn_append ac_header_list " stdlib.h"
+as_fn_append ac_header_list " unistd.h"
+as_fn_append ac_header_list " sys/param.h"
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in $ac_precious_vars; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val=\$ac_cv_env_${ac_var}_value
+  eval ac_new_val=\$ac_env_${ac_var}_value
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+$as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+	# differences in whitespace do not lead to failure.
+	ac_old_val_w=`echo x $ac_old_val`
+	ac_new_val_w=`echo x $ac_new_val`
+	if test "$ac_old_val_w" != "$ac_new_val_w"; then
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+$as_echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  ac_cache_corrupted=:
+	else
+	  { $as_echo "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+$as_echo "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  eval $ac_var=\$ac_old_val
+	fi
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+$as_echo "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ $as_echo "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+$as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *\'*) ac_arg=$ac_var=`$as_echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) as_fn_append ac_configure_args " '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+$as_echo "$as_me: error: changes in the environment can compromise the build" >&2;}
+  as_fn_error $? "run \`make distclean' and/or \`rm $cache_file' and start over" "$LINENO" 5
+fi
+## -------------------- ##
+## Main body of script. ##
+## -------------------- ##
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+am__api_version='1.11'
+
+ac_aux_dir=
+for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
+  if test -f "$ac_dir/install-sh"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f "$ac_dir/install.sh"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  elif test -f "$ac_dir/shtool"; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/shtool install -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" "$LINENO" 5
+fi
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+ac_config_guess="$SHELL $ac_aux_dir/config.guess"  # Please don't use this var.
+ac_config_sub="$SHELL $ac_aux_dir/config.sub"  # Please don't use this var.
+ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
+
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+# Reject install programs that cannot install multiple files.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
+$as_echo_n "checking for a BSD-compatible install... " >&6; }
+if test -z "$INSTALL"; then
+if test "${ac_cv_path_install+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in #((
+  ./ | .// | /[cC]/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:[\\/]os2[\\/]install[\\/]* | ?:[\\/]OS2[\\/]INSTALL[\\/]* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if { test -f "$as_dir/$ac_prog$ac_exec_ext" && $as_test_x "$as_dir/$ac_prog$ac_exec_ext"; }; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    rm -rf conftest.one conftest.two conftest.dir
+	    echo one > conftest.one
+	    echo two > conftest.two
+	    mkdir conftest.dir
+	    if "$as_dir/$ac_prog$ac_exec_ext" -c conftest.one conftest.two "`pwd`/conftest.dir" &&
+	      test -s conftest.one && test -s conftest.two &&
+	      test -s conftest.dir/conftest.one &&
+	      test -s conftest.dir/conftest.two
+	    then
+	      ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+	      break 3
+	    fi
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+
+  done
+IFS=$as_save_IFS
+
+rm -rf conftest.one conftest.two conftest.dir
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    INSTALL=$ac_install_sh
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INSTALL" >&5
+$as_echo "$INSTALL" >&6; }
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
+$as_echo_n "checking whether build environment is sane... " >&6; }
+# Just in case
+sleep 1
+echo timestamp > conftest.file
+# Reject unsafe characters in $srcdir or the absolute working directory
+# name.  Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+  *[\\\"\#\$\&\'\`$am_lf]*)
+    as_fn_error $? "unsafe absolute working directory name" "$LINENO" 5 ;;
+esac
+case $srcdir in
+  *[\\\"\#\$\&\'\`$am_lf\ \	]*)
+    as_fn_error $? "unsafe srcdir value: \`$srcdir'" "$LINENO" 5 ;;
+esac
+
+# Do `set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+   if test "$*" = "X"; then
+      # -L didn't work.
+      set X `ls -t "$srcdir/configure" conftest.file`
+   fi
+   rm -f conftest.file
+   if test "$*" != "X $srcdir/configure conftest.file" \
+      && test "$*" != "X conftest.file $srcdir/configure"; then
+
+      # If neither matched, then we have a broken ls.  This can happen
+      # if, for instance, CONFIG_SHELL is bash and it inherits a
+      # broken ls alias from the environment.  This has actually
+      # happened.  Such a system could not be considered "sane".
+      as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
+alias in your environment" "$LINENO" 5
+   fi
+
+   test "$2" = conftest.file
+   )
+then
+   # Ok.
+   :
+else
+   as_fn_error $? "newly created file is older than distributed files!
+Check your system clock" "$LINENO" 5
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+test "$program_prefix" != NONE &&
+  program_transform_name="s&^&$program_prefix&;$program_transform_name"
+# Use a double $ so make ignores it.
+test "$program_suffix" != NONE &&
+  program_transform_name="s&\$&$program_suffix&;$program_transform_name"
+# Double any \ or $.
+# By default was `s,x,x', remove it if useless.
+ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
+program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"`
+
+# expand $ac_aux_dir to an absolute path
+am_aux_dir=`cd $ac_aux_dir && pwd`
+
+if test x"${MISSING+set}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
+  *)
+    MISSING="\${SHELL} $am_aux_dir/missing" ;;
+  esac
+fi
+# Use eval to expand $SHELL
+if eval "$MISSING --run true"; then
+  am_missing_run="$MISSING --run "
+else
+  am_missing_run=
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \`missing' script is too old or missing" >&5
+$as_echo "$as_me: WARNING: \`missing' script is too old or missing" >&2;}
+fi
+
+if test x"${install_sh}" != xset; then
+  case $am_aux_dir in
+  *\ * | *\	*)
+    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
+  *)
+    install_sh="\${SHELL} $am_aux_dir/install-sh"
+  esac
+fi
+
+# Installed binaries are usually stripped using `strip' when the user
+# run `make install-strip'.  However `strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
+# will honor the `STRIP' environment variable to overrule this program.
+if test "$cross_compiling" != no; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_STRIP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+$as_echo "$ac_ct_STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a thread-safe mkdir -p" >&5
+$as_echo_n "checking for a thread-safe mkdir -p... " >&6; }
+if test -z "$MKDIR_P"; then
+  if test "${ac_cv_path_mkdir+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/opt/sfw/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in mkdir gmkdir; do
+	 for ac_exec_ext in '' $ac_executable_extensions; do
+	   { test -f "$as_dir/$ac_prog$ac_exec_ext" && $as_test_x "$as_dir/$ac_prog$ac_exec_ext"; } || continue
+	   case `"$as_dir/$ac_prog$ac_exec_ext" --version 2>&1` in #(
+	     'mkdir (GNU coreutils) '* | \
+	     'mkdir (coreutils) '* | \
+	     'mkdir (fileutils) '4.1*)
+	       ac_cv_path_mkdir=$as_dir/$ac_prog$ac_exec_ext
+	       break 3;;
+	   esac
+	 done
+       done
+  done
+IFS=$as_save_IFS
+
+fi
+
+  test -d ./--version && rmdir ./--version
+  if test "${ac_cv_path_mkdir+set}" = set; then
+    MKDIR_P="$ac_cv_path_mkdir -p"
+  else
+    # As a last resort, use the slow shell script.  Don't cache a
+    # value for MKDIR_P within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the value is a relative name.
+    MKDIR_P="$ac_install_sh -d"
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
+$as_echo "$MKDIR_P" >&6; }
+
+mkdir_p="$MKDIR_P"
+case $mkdir_p in
+  [\\/$]* | ?:[\\/]*) ;;
+  */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;;
+esac
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_AWK+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_AWK="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} sets \$(MAKE)" >&5
+$as_echo_n "checking whether ${MAKE-make} sets \$(MAKE)... " >&6; }
+set x ${MAKE-make}
+ac_make=`$as_echo "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
+if eval "test \"\${ac_cv_prog_make_${ac_make}_set+set}\"" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.make <<\_ACEOF
+SHELL = /bin/sh
+all:
+	@echo '@@@%%%=$(MAKE)=@@@%%%'
+_ACEOF
+# GNU make sometimes prints "make[1]: Entering ...", which would confuse us.
+case `${MAKE-make} -f conftest.make 2>/dev/null` in
+  *@@@%%%=?*=@@@%%%*)
+    eval ac_cv_prog_make_${ac_make}_set=yes;;
+  *)
+    eval ac_cv_prog_make_${ac_make}_set=no;;
+esac
+rm -f conftest.make
+fi
+if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+  SET_MAKE=
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+rm -rf .tst 2>/dev/null
+mkdir .tst 2>/dev/null
+if test -d .tst; then
+  am__leading_dot=.
+else
+  am__leading_dot=_
+fi
+rmdir .tst 2>/dev/null
+
+if test "`cd $srcdir && pwd`" != "`pwd`"; then
+  # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
+  # is not polluted with repeated "-I."
+  am__isrc=' -I$(srcdir)'
+  # test to see if srcdir already configured
+  if test -f $srcdir/config.status; then
+    as_fn_error $? "source directory already configured; run \"make distclean\" there first" "$LINENO" 5
+  fi
+fi
+
+# test whether we have cygpath
+if test -z "$CYGPATH_W"; then
+  if (cygpath --version) >/dev/null 2>/dev/null; then
+    CYGPATH_W='cygpath -w'
+  else
+    CYGPATH_W=echo
+  fi
+fi
+
+
+# Define the identity of the package.
+ PACKAGE='knot'
+ VERSION='0.8'
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE "$PACKAGE"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define VERSION "$VERSION"
+_ACEOF
+
+# Some tools Automake needs.
+
+ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"}
+
+
+AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"}
+
+
+AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"}
+
+
+AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"}
+
+
+MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
+
+# We need awk for the "check" target.  The system "awk" is bad on
+# some platforms.
+# Always define AMTAR for backward compatibility.
+
+AMTAR=${AMTAR-"${am_missing_run}tar"}
+
+am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'
+
+
+
+
+
+
+ac_config_headers="$ac_config_headers src/config.h"
+
+
+DEPDIR="${am__leading_dot}deps"
+
+ac_config_commands="$ac_config_commands depfiles"
+
+
+am_make=${MAKE-make}
+cat > confinc << 'END'
+am__doit:
+	@echo this is the am__doit target
+.PHONY: am__doit
+END
+# If we don't find an include directive, just comment out the code.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for style of include used by $am_make" >&5
+$as_echo_n "checking for style of include used by $am_make... " >&6; }
+am__include="#"
+am__quote=
+_am_result=none
+# First try GNU make style include.
+echo "include confinc" > confmf
+# Ignore all kinds of additional output from `make'.
+case `$am_make -s -f confmf 2> /dev/null` in #(
+*the\ am__doit\ target*)
+  am__include=include
+  am__quote=
+  _am_result=GNU
+  ;;
+esac
+# Now try BSD make style include.
+if test "$am__include" = "#"; then
+   echo '.include "confinc"' > confmf
+   case `$am_make -s -f confmf 2> /dev/null` in #(
+   *the\ am__doit\ target*)
+     am__include=.include
+     am__quote="\""
+     _am_result=BSD
+     ;;
+   esac
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $_am_result" >&5
+$as_echo "$_am_result" >&6; }
+rm -f confinc confmf
+
+# Check whether --enable-dependency-tracking was given.
+if test "${enable_dependency_tracking+set}" = set; then :
+  enableval=$enable_dependency_tracking;
+fi
+
+if test "x$enable_dependency_tracking" != xno; then
+  am_depcomp="$ac_aux_dir/depcomp"
+  AMDEPBACKSLASH='\'
+fi
+ if test "x$enable_dependency_tracking" != xno; then
+  AMDEP_TRUE=
+  AMDEP_FALSE='#'
+else
+  AMDEP_TRUE='#'
+  AMDEP_FALSE=
+fi
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+
+
+test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5 ; }
+
+# Provide some information about the compiler.
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+$as_echo_n "checking whether the C compiler works... " >&6; }
+ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+
+# The possible output files:
+ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
+
+ac_rmfiles=
+for ac_file in $ac_files
+do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    * ) ac_rmfiles="$ac_rmfiles $ac_file";;
+  esac
+done
+rm -f $ac_rmfiles
+
+if { { ac_try="$ac_link_default"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link_default") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
+# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+# in a Makefile.  We should not override ac_cv_exeext if it was cached,
+# so that the user can short-circuit this test for compilers unknown to
+# Autoconf.
+for ac_file in $ac_files ''
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj )
+	;;
+    [ab].out )
+	# We found the default executable, but exeext='' is most
+	# certainly right.
+	break;;
+    *.* )
+	if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
+	then :; else
+	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	fi
+	# We set ac_cv_exeext here because the later test for it is not
+	# safe: cross compilers may not add the suffix if given an `-o'
+	# argument, so we may need to know it at that point already.
+	# Even if this section looks crufty: it has the advantage of
+	# actually working.
+	break;;
+    * )
+	break;;
+  esac
+done
+test "$ac_cv_exeext" = no && ac_cv_exeext=
+
+else
+  ac_file=''
+fi
+if test -z "$ac_file"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+$as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "C compiler cannot create executables
+See \`config.log' for more details" "$LINENO" 5 ; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+$as_echo_n "checking for C compiler default output file name... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+$as_echo "$ac_file" >&6; }
+ac_exeext=$ac_cv_exeext
+
+rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+$as_echo_n "checking for suffix of executables... " >&6; }
+if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	  break;;
+    * ) break;;
+  esac
+done
+else
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details" "$LINENO" 5 ; }
+fi
+rm -f conftest conftest$ac_cv_exeext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+$as_echo "$ac_cv_exeext" >&6; }
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+FILE *f = fopen ("conftest.out", "w");
+ return ferror (f) || fclose (f) != 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files="$ac_clean_files conftest.out"
+# Check that the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+$as_echo_n "checking whether we are cross compiling... " >&6; }
+if test "$cross_compiling" != yes; then
+  { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+  if { ac_try='./conftest$ac_cv_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run C compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details" "$LINENO" 5 ; }
+    fi
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+$as_echo "$cross_compiling" >&6; }
+
+rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+ac_clean_files=$ac_clean_files_save
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+$as_echo_n "checking for suffix of object files... " >&6; }
+if test "${ac_cv_objext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { { ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compile") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then :
+  for ac_file in conftest.o conftest.obj conftest.*; do
+  test -f "$ac_file" || continue;
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.map | *.inf | *.dSYM ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot compute suffix of object files: cannot compile
+See \`config.log' for more details" "$LINENO" 5 ; }
+fi
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+$as_echo "$ac_cv_objext" >&6; }
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
+$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
+if test "${ac_cv_c_compiler_gnu+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_compiler_gnu=yes
+else
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+$as_echo "$ac_cv_c_compiler_gnu" >&6; }
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+$as_echo_n "checking whether $CC accepts -g... " >&6; }
+if test "${ac_cv_prog_cc_g+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+else
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+$as_echo "$ac_cv_prog_cc_g" >&6; }
+if test "$ac_test_CFLAGS" = set; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
+$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
+if test "${ac_cv_prog_cc_c89+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not '\xHH' hex character constants.
+   These don't provoke an error unfortunately, instead are silently treated
+   as 'x'.  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
+   array size at least.  It's necessary to write '\x00'==0 to get something
+   that's true only with -std.  */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) 'x'
+int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
+	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c89" in
+  x)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+  xno)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+  *)
+    CC="$CC $ac_cv_prog_cc_c89"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+depcc="$CC"   am_compiler_list=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+$as_echo_n "checking dependency style of $depcc... " >&6; }
+if test "${am_cv_CC_dependencies_compiler_type+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named `D' -- because `-MD' means `put the output
+  # in D'.
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CC_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
+      # Solaris 8's {/usr,}/bin/sh.
+      touch sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with `-c' and `-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle `-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # after this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvisualcpp | msvcmsys)
+      # This compiler won't grok `-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CC_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CC_dependencies_compiler_type=none
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CC_dependencies_compiler_type" >&6; }
+CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
+  am__fastdepCC_TRUE=
+  am__fastdepCC_FALSE='#'
+else
+  am__fastdepCC_TRUE='#'
+  am__fastdepCC_FALSE=
+fi
+
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+$as_echo_n "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if test "${ac_cv_prog_CPP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+      # Double quotes because CPP needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+  break
+fi
+
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
+else
+  ac_cv_prog_CPP=$CPP
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+$as_echo "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+
+else
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+  # Broken: success on invalid input.
+continue
+else
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then :
+
+else
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5 ; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
+if test "${ac_cv_path_GREP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in grep ggrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+      { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+$as_echo_n "checking for egrep... " >&6; }
+if test "${ac_cv_path_EGREP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in egrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+      { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
+$as_echo_n "checking for ANSI C header files... " >&6; }
+if test "${ac_cv_header_stdc+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_header_stdc=yes
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <string.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "memchr" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "free" >/dev/null 2>&1; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then :
+  :
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ctype.h>
+#include <stdlib.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) \
+		   (('a' <= (c) && (c) <= 'i') \
+		     || ('j' <= (c) && (c) <= 'r') \
+		     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
+#endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int
+main ()
+{
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+	|| toupper (i) != TOUPPER (i))
+      return 2;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+else
+  ac_cv_header_stdc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
+$as_echo "$ac_cv_header_stdc" >&6; }
+if test $ac_cv_header_stdc = yes; then
+
+$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+
+fi
+
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+		  inttypes.h stdint.h unistd.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
+  ac_fn_c_check_header_mongrel "$LINENO" "minix/config.h" "ac_cv_header_minix_config_h" "$ac_includes_default"
+if test "x$ac_cv_header_minix_config_h" = x""yes; then :
+  MINIX=yes
+else
+  MINIX=
+fi
+
+
+  if test "$MINIX" = yes; then
+
+$as_echo "#define _POSIX_SOURCE 1" >>confdefs.h
+
+
+$as_echo "#define _POSIX_1_SOURCE 2" >>confdefs.h
+
+
+$as_echo "#define _MINIX 1" >>confdefs.h
+
+  fi
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether it is safe to define __EXTENSIONS__" >&5
+$as_echo_n "checking whether it is safe to define __EXTENSIONS__... " >&6; }
+if test "${ac_cv_safe_to_define___extensions__+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#	  define __EXTENSIONS__ 1
+	  $ac_includes_default
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_safe_to_define___extensions__=yes
+else
+  ac_cv_safe_to_define___extensions__=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_safe_to_define___extensions__" >&5
+$as_echo "$ac_cv_safe_to_define___extensions__" >&6; }
+  test $ac_cv_safe_to_define___extensions__ = yes &&
+    $as_echo "#define __EXTENSIONS__ 1" >>confdefs.h
+
+  $as_echo "#define _ALL_SOURCE 1" >>confdefs.h
+
+  $as_echo "#define _GNU_SOURCE 1" >>confdefs.h
+
+  $as_echo "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h
+
+  $as_echo "#define _TANDEM_SOURCE 1" >>confdefs.h
+
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for x86 cpuid  output" >&5
+$as_echo_n "checking for x86 cpuid  output... " >&6; }
+if test "${ax_cv_gcc_x86_cpuid_+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  ax_cv_gcc_x86_cpuid_=unknown
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+
+     int op = , eax, ebx, ecx, edx;
+     FILE *f;
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64)
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "pop %%rbx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "mov %%rbx, %%rax\n\t"
+             "pop %%rbx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#else
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "pop %%ebx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "mov %%ebx, %%eax\n\t"
+             "pop %%ebx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#endif
+     f = fopen("conftest_cpuid", "w"); if (!f) return 1;
+     fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
+     fclose(f);
+     return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ax_cv_gcc_x86_cpuid_=`cat conftest_cpuid`; rm -f conftest_cpuid
+else
+  ax_cv_gcc_x86_cpuid_=unknown; rm -f conftest_cpuid
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_gcc_x86_cpuid_" >&5
+$as_echo "$ax_cv_gcc_x86_cpuid_" >&6; }
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for x86 cpuid 0x00000001 output" >&5
+$as_echo_n "checking for x86 cpuid 0x00000001 output... " >&6; }
+if test "${ax_cv_gcc_x86_cpuid_0x00000001+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  ax_cv_gcc_x86_cpuid_0x00000001=unknown
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+
+     int op = 0x00000001, eax, ebx, ecx, edx;
+     FILE *f;
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64)
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "pop %%rbx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "mov %%rbx, %%rax\n\t"
+             "pop %%rbx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#else
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "pop %%ebx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "mov %%ebx, %%eax\n\t"
+             "pop %%ebx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#endif
+     f = fopen("conftest_cpuid", "w"); if (!f) return 1;
+     fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
+     fclose(f);
+     return 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ax_cv_gcc_x86_cpuid_0x00000001=`cat conftest_cpuid`; rm -f conftest_cpuid
+else
+  ax_cv_gcc_x86_cpuid_0x00000001=unknown; rm -f conftest_cpuid
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_gcc_x86_cpuid_0x00000001" >&5
+$as_echo "$ax_cv_gcc_x86_cpuid_0x00000001" >&6; }
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+  if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+    ecx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 3`
+    edx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4`
+  fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether mmx is supported" >&5
+$as_echo_n "checking whether mmx is supported... " >&6; }
+if test "${ax_cv_have_mmx_ext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ax_cv_have_mmx_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$edx>>23&0x01))" = 1; then
+        ax_cv_have_mmx_ext=yes
+      fi
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_have_mmx_ext" >&5
+$as_echo "$ax_cv_have_mmx_ext" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sse is supported" >&5
+$as_echo_n "checking whether sse is supported... " >&6; }
+if test "${ax_cv_have_sse_ext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ax_cv_have_sse_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$edx>>25&0x01))" = 1; then
+        ax_cv_have_sse_ext=yes
+      fi
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_have_sse_ext" >&5
+$as_echo "$ax_cv_have_sse_ext" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sse2 is supported" >&5
+$as_echo_n "checking whether sse2 is supported... " >&6; }
+if test "${ax_cv_have_sse2_ext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ax_cv_have_sse2_ext=no
+    if test "$((0x$edx>>26&0x01))" = 1; then
+      ax_cv_have_sse2_ext=yes
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_have_sse2_ext" >&5
+$as_echo "$ax_cv_have_sse2_ext" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sse3 is supported" >&5
+$as_echo_n "checking whether sse3 is supported... " >&6; }
+if test "${ax_cv_have_sse3_ext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ax_cv_have_sse3_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$ecx&0x01))" = 1; then
+        ax_cv_have_sse3_ext=yes
+      fi
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_have_sse3_ext" >&5
+$as_echo "$ax_cv_have_sse3_ext" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ssse3 is supported" >&5
+$as_echo_n "checking whether ssse3 is supported... " >&6; }
+if test "${ax_cv_have_ssse3_ext+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ax_cv_have_ssse3_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$ecx>>9&0x01))" = 1; then
+        ax_cv_have_ssse3_ext=yes
+      fi
+    fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_have_ssse3_ext" >&5
+$as_echo "$ax_cv_have_ssse3_ext" >&6; }
+
+  if test "$ax_cv_have_mmx_ext" = yes; then
+
+$as_echo "#define HAVE_MMX /**/" >>confdefs.h
+
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -mmmx" >&5
+$as_echo_n "checking whether C compiler accepts -mmmx... " >&6; }
+if test "${ax_cv_c_flags__mmmx+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      ax_save_FLAGS=$CFLAGS
+      CFLAGS="-mmmx"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ax_cv_c_flags__mmmx=yes
+else
+  ax_cv_c_flags__mmmx=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+      CFLAGS=$ax_save_FLAGS
+fi
+
+eval ax_check_compiler_flags=$ax_cv_c_flags__mmmx
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_check_compiler_flags" >&5
+$as_echo "$ax_check_compiler_flags" >&6; }
+if test "x$ax_check_compiler_flags" = xyes; then
+	SIMD_FLAGS="$SIMD_FLAGS -mmmx"
+else
+	:
+fi
+
+  fi
+
+  if test "$ax_cv_have_sse_ext" = yes; then
+
+$as_echo "#define HAVE_SSE /**/" >>confdefs.h
+
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -msse" >&5
+$as_echo_n "checking whether C compiler accepts -msse... " >&6; }
+if test "${ax_cv_c_flags__msse+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      ax_save_FLAGS=$CFLAGS
+      CFLAGS="-msse"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ax_cv_c_flags__msse=yes
+else
+  ax_cv_c_flags__msse=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+      CFLAGS=$ax_save_FLAGS
+fi
+
+eval ax_check_compiler_flags=$ax_cv_c_flags__msse
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_check_compiler_flags" >&5
+$as_echo "$ax_check_compiler_flags" >&6; }
+if test "x$ax_check_compiler_flags" = xyes; then
+	SIMD_FLAGS="$SIMD_FLAGS -msse"
+else
+	:
+fi
+
+  fi
+
+  if test "$ax_cv_have_sse2_ext" = yes; then
+
+$as_echo "#define HAVE_SSE2 /**/" >>confdefs.h
+
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -msse2" >&5
+$as_echo_n "checking whether C compiler accepts -msse2... " >&6; }
+if test "${ax_cv_c_flags__msse2+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      ax_save_FLAGS=$CFLAGS
+      CFLAGS="-msse2"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ax_cv_c_flags__msse2=yes
+else
+  ax_cv_c_flags__msse2=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+      CFLAGS=$ax_save_FLAGS
+fi
+
+eval ax_check_compiler_flags=$ax_cv_c_flags__msse2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_check_compiler_flags" >&5
+$as_echo "$ax_check_compiler_flags" >&6; }
+if test "x$ax_check_compiler_flags" = xyes; then
+	SIMD_FLAGS="$SIMD_FLAGS -msse2"
+else
+	:
+fi
+
+  fi
+
+  if test "$ax_cv_have_sse3_ext" = yes; then
+
+$as_echo "#define HAVE_SSE3 /**/" >>confdefs.h
+
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -msse3" >&5
+$as_echo_n "checking whether C compiler accepts -msse3... " >&6; }
+if test "${ax_cv_c_flags__msse3+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+      ax_save_FLAGS=$CFLAGS
+      CFLAGS="-msse3"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ax_cv_c_flags__msse3=yes
+else
+  ax_cv_c_flags__msse3=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+      CFLAGS=$ax_save_FLAGS
+fi
+
+eval ax_check_compiler_flags=$ax_cv_c_flags__msse3
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_check_compiler_flags" >&5
+$as_echo "$ax_check_compiler_flags" >&6; }
+if test "x$ax_check_compiler_flags" = xyes; then
+	SIMD_FLAGS="$SIMD_FLAGS -msse3"
+else
+	:
+fi
+
+  fi
+
+  if test "$ax_cv_have_ssse3_ext" = yes; then
+
+$as_echo "#define HAVE_SSSE3 /**/" >>confdefs.h
+
+  fi
+
+
+
+
+# Enable maintainer mode by default for development
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to disable maintainer-specific portions of Makefiles" >&5
+$as_echo_n "checking whether to disable maintainer-specific portions of Makefiles... " >&6; }
+    # Check whether --enable-maintainer-mode was given.
+if test "${enable_maintainer_mode+set}" = set; then :
+  enableval=$enable_maintainer_mode; USE_MAINTAINER_MODE=$enableval
+else
+  USE_MAINTAINER_MODE=yes
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $USE_MAINTAINER_MODE" >&5
+$as_echo "$USE_MAINTAINER_MODE" >&6; }
+   if test $USE_MAINTAINER_MODE = yes; then
+  MAINTAINER_MODE_TRUE=
+  MAINTAINER_MODE_FALSE='#'
+else
+  MAINTAINER_MODE_TRUE='#'
+  MAINTAINER_MODE_FALSE=
+fi
+
+  MAINT=$MAINTAINER_MODE_TRUE
+
+
+
+# Initialize libtool
+case `pwd` in
+  *\ * | *\	*)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
+$as_echo "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
+esac
+
+
+
+macro_version='2.2.6b'
+macro_revision='1.3017'
+
+
+
+
+
+
+
+
+
+
+
+
+
+ltmain="$ac_aux_dir/ltmain.sh"
+
+# Make sure we can run config.sub.
+$SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
+  as_fn_error $? "cannot run $SHELL $ac_aux_dir/config.sub" "$LINENO" 5
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
+$as_echo_n "checking build system type... " >&6; }
+if test "${ac_cv_build+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_build_alias=$build_alias
+test "x$ac_build_alias" = x &&
+  ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`
+test "x$ac_build_alias" = x &&
+  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
+ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||
+  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
+$as_echo "$ac_cv_build" >&6; }
+case $ac_cv_build in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical build" "$LINENO" 5 ;;
+esac
+build=$ac_cv_build
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_build
+shift
+build_cpu=$1
+build_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+build_os=$*
+IFS=$ac_save_IFS
+case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
+$as_echo_n "checking host system type... " >&6; }
+if test "${ac_cv_host+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "x$host_alias" = x; then
+  ac_cv_host=$ac_cv_build
+else
+  ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
+    as_fn_error $? "$SHELL $ac_aux_dir/config.sub $host_alias failed" "$LINENO" 5
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
+$as_echo "$ac_cv_host" >&6; }
+case $ac_cv_host in
+*-*-*) ;;
+*) as_fn_error $? "invalid value of canonical host" "$LINENO" 5 ;;
+esac
+host=$ac_cv_host
+ac_save_IFS=$IFS; IFS='-'
+set x $ac_cv_host
+shift
+host_cpu=$1
+host_vendor=$2
+shift; shift
+# Remember, the first character of IFS is used to create $*,
+# except with old shells:
+host_os=$*
+IFS=$ac_save_IFS
+case $host_os in *\ *) host_os=`echo "$host_os" | sed 's/ /-/g'`;; esac
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+$as_echo_n "checking for a sed that does not truncate output... " >&6; }
+if test "${ac_cv_path_SED+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+     { ac_script=; unset ac_script;}
+     if test -z "$SED"; then
+  ac_path_SED_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in sed gsed; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+      { test -f "$ac_path_SED" && $as_test_x "$ac_path_SED"; } || continue
+# Check for GNU ac_path_SED and select it if it is found.
+  # Check for GNU $ac_path_SED
+case `"$ac_path_SED" --version 2>&1` in
+*GNU*)
+  ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo '' >> "conftest.nl"
+    "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_SED_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_SED="$ac_path_SED"
+      ac_path_SED_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_SED_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_SED"; then
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
+  fi
+else
+  ac_cv_path_SED=$SED
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+$as_echo "$ac_cv_path_SED" >&6; }
+ SED="$ac_cv_path_SED"
+  rm -f conftest.sed
+
+test -z "$SED" && SED=sed
+Xsed="$SED -e 1s/^X//"
+
+
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+$as_echo_n "checking for fgrep... " >&6; }
+if test "${ac_cv_path_FGREP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
+   then ac_cv_path_FGREP="$GREP -F"
+   else
+     if test -z "$FGREP"; then
+  ac_path_FGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in fgrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext"
+      { test -f "$ac_path_FGREP" && $as_test_x "$ac_path_FGREP"; } || continue
+# Check for GNU ac_path_FGREP and select it if it is found.
+  # Check for GNU $ac_path_FGREP
+case `"$ac_path_FGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_FGREP="$ac_path_FGREP" ac_path_FGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'FGREP' >> "conftest.nl"
+    "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_FGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_FGREP="$ac_path_FGREP"
+      ac_path_FGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_FGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_FGREP"; then
+    as_fn_error $? "no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_FGREP=$FGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
+$as_echo "$ac_cv_path_FGREP" >&6; }
+ FGREP="$ac_cv_path_FGREP"
+
+
+test -z "$GREP" && GREP=grep
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-gnu-ld was given.
+if test "${with_gnu_ld+set}" = set; then :
+  withval=$with_gnu_ld; test "$withval" = no || with_gnu_ld=yes
+else
+  with_gnu_ld=no
+fi
+
+ac_prog=ld
+if test "$GCC" = yes; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+$as_echo_n "checking for ld used by $CC... " >&6; }
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [\\/]* | ?:[\\/]*)
+      re_direlt='/[^/][^/]*/\.\./'
+      # Canonicalize the pathname of ld
+      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
+      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD="$ac_prog"
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test "$with_gnu_ld" = yes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+$as_echo_n "checking for GNU ld... " >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+$as_echo_n "checking for non-GNU ld... " >&6; }
+fi
+if test "${lt_cv_path_LD+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$LD"; then
+  lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+  for ac_dir in $PATH; do
+    IFS="$lt_save_ifs"
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD="$ac_dir/$ac_prog"
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some variants of GNU ld only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
+      *GNU* | *'with BFD'*)
+	test "$with_gnu_ld" != no && break
+	;;
+      *)
+	test "$with_gnu_ld" != yes && break
+	;;
+      esac
+    fi
+  done
+  IFS="$lt_save_ifs"
+else
+  lt_cv_path_LD="$LD" # Let the user override the test with a path.
+fi
+fi
+
+LD="$lt_cv_path_LD"
+if test -n "$LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+$as_echo "$LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+$as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
+if test "${lt_cv_prog_gnu_ld+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  # I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  lt_cv_prog_gnu_ld=yes
+  ;;
+*)
+  lt_cv_prog_gnu_ld=no
+  ;;
+esac
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
+$as_echo "$lt_cv_prog_gnu_ld" >&6; }
+with_gnu_ld=$lt_cv_prog_gnu_ld
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
+$as_echo_n "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
+if test "${lt_cv_path_NM+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NM"; then
+  # Let the user override the test.
+  lt_cv_path_NM="$NM"
+else
+  lt_nm_to_check="${ac_tool_prefix}nm"
+  if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
+    lt_nm_to_check="$lt_nm_to_check nm"
+  fi
+  for lt_tmp_nm in $lt_nm_to_check; do
+    lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
+      IFS="$lt_save_ifs"
+      test -z "$ac_dir" && ac_dir=.
+      tmp_nm="$ac_dir/$lt_tmp_nm"
+      if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext" ; then
+	# Check to see if the nm accepts a BSD-compat flag.
+	# Adding the `sed 1q' prevents false positives on HP-UX, which says:
+	#   nm: unknown option "B" ignored
+	# Tru64's nm complains that /dev/null is an invalid object file
+	case `"$tmp_nm" -B /dev/null 2>&1 | sed '1q'` in
+	*/dev/null* | *'Invalid file or object type'*)
+	  lt_cv_path_NM="$tmp_nm -B"
+	  break
+	  ;;
+	*)
+	  case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in
+	  */dev/null*)
+	    lt_cv_path_NM="$tmp_nm -p"
+	    break
+	    ;;
+	  *)
+	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
+	    continue # so that we can try to find one that supports BSD flags
+	    ;;
+	  esac
+	  ;;
+	esac
+      fi
+    done
+    IFS="$lt_save_ifs"
+  done
+  : ${lt_cv_path_NM=no}
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
+$as_echo "$lt_cv_path_NM" >&6; }
+if test "$lt_cv_path_NM" != "no"; then
+  NM="$lt_cv_path_NM"
+else
+  # Didn't find any BSD compatible name lister, look for dumpbin.
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in "dumpbin -symbols" "link -dump -symbols"
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_DUMPBIN+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$DUMPBIN"; then
+  ac_cv_prog_DUMPBIN="$DUMPBIN" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+DUMPBIN=$ac_cv_prog_DUMPBIN
+if test -n "$DUMPBIN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
+$as_echo "$DUMPBIN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$DUMPBIN" && break
+  done
+fi
+if test -z "$DUMPBIN"; then
+  ac_ct_DUMPBIN=$DUMPBIN
+  for ac_prog in "dumpbin -symbols" "link -dump -symbols"
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_DUMPBIN+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_DUMPBIN"; then
+  ac_cv_prog_ac_ct_DUMPBIN="$ac_ct_DUMPBIN" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_DUMPBIN="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN
+if test -n "$ac_ct_DUMPBIN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
+$as_echo "$ac_ct_DUMPBIN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_DUMPBIN" && break
+done
+
+  if test "x$ac_ct_DUMPBIN" = x; then
+    DUMPBIN=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    DUMPBIN=$ac_ct_DUMPBIN
+  fi
+fi
+
+
+  if test "$DUMPBIN" != ":"; then
+    NM="$DUMPBIN"
+  fi
+fi
+test -z "$NM" && NM=nm
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
+$as_echo_n "checking the name lister ($NM) interface... " >&6; }
+if test "${lt_cv_nm_interface+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_nm_interface="BSD nm"
+  echo "int some_variable = 0;" > conftest.$ac_ext
+  (eval echo "\"\$as_me:5468: $ac_compile\"" >&5)
+  (eval "$ac_compile" 2>conftest.err)
+  cat conftest.err >&5
+  (eval echo "\"\$as_me:5471: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
+  cat conftest.err >&5
+  (eval echo "\"\$as_me:5474: output\"" >&5)
+  cat conftest.out >&5
+  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
+    lt_cv_nm_interface="MS dumpbin"
+  fi
+  rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
+$as_echo "$lt_cv_nm_interface" >&6; }
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+$as_echo_n "checking whether ln -s works... " >&6; }
+LN_S=$as_ln_s
+if test "$LN_S" = "ln -s"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+$as_echo "no, using $LN_S" >&6; }
+fi
+
+# find the maximum length of command line arguments
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
+$as_echo_n "checking the maximum length of command line arguments... " >&6; }
+if test "${lt_cv_sys_max_cmd_len+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+    i=0
+  teststring="ABCD"
+
+  case $build_os in
+  msdosdjgpp*)
+    # On DJGPP, this test can blow up pretty badly due to problems in libc
+    # (any single argument exceeding 2000 bytes causes a buffer overrun
+    # during glob expansion).  Even if it were fixed, the result of this
+    # check would be larger than it should be.
+    lt_cv_sys_max_cmd_len=12288;    # 12K is about right
+    ;;
+
+  gnu*)
+    # Under GNU Hurd, this test is not required because there is
+    # no limit to the length of command line arguments.
+    # Libtool will interpret -1 as no limit whatsoever
+    lt_cv_sys_max_cmd_len=-1;
+    ;;
+
+  cygwin* | mingw* | cegcc*)
+    # On Win9x/ME, this test blows up -- it succeeds, but takes
+    # about 5 minutes as the teststring grows exponentially.
+    # Worse, since 9x/ME are not pre-emptively multitasking,
+    # you end up with a "frozen" computer, even though with patience
+    # the test eventually succeeds (with a max line length of 256k).
+    # Instead, let's just punt: use the minimum linelength reported by
+    # all of the supported platforms: 8192 (on NT/2K/XP).
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  amigaos*)
+    # On AmigaOS with pdksh, this test takes hours, literally.
+    # So we just punt and use a minimum line length of 8192.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  netbsd* | freebsd* | openbsd* | darwin* | dragonfly*)
+    # This has been around since 386BSD, at least.  Likely further.
+    if test -x /sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
+    elif test -x /usr/sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
+    else
+      lt_cv_sys_max_cmd_len=65536	# usable default for all BSDs
+    fi
+    # And add a safety zone
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    ;;
+
+  interix*)
+    # We know the value 262144 and hardcode it with a safety zone (like BSD)
+    lt_cv_sys_max_cmd_len=196608
+    ;;
+
+  osf*)
+    # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure
+    # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not
+    # nice to cause kernel panics so lets avoid the loop below.
+    # First set a reasonable default.
+    lt_cv_sys_max_cmd_len=16384
+    #
+    if test -x /sbin/sysconfig; then
+      case `/sbin/sysconfig -q proc exec_disable_arg_limit` in
+        *1*) lt_cv_sys_max_cmd_len=-1 ;;
+      esac
+    fi
+    ;;
+  sco3.2v5*)
+    lt_cv_sys_max_cmd_len=102400
+    ;;
+  sysv5* | sco5v6* | sysv4.2uw2*)
+    kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null`
+    if test -n "$kargmax"; then
+      lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[	 ]//'`
+    else
+      lt_cv_sys_max_cmd_len=32768
+    fi
+    ;;
+  *)
+    lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
+    if test -n "$lt_cv_sys_max_cmd_len"; then
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    else
+      # Make teststring a little bigger before we do anything with it.
+      # a 1K string should be a reasonable start.
+      for i in 1 2 3 4 5 6 7 8 ; do
+        teststring=$teststring$teststring
+      done
+      SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
+      # If test is not a shell built-in, we'll probably end up computing a
+      # maximum length that is only half of the actual maximum length, but
+      # we can't tell.
+      while { test "X"`$SHELL $0 --fallback-echo "X$teststring$teststring" 2>/dev/null` \
+	         = "XX$teststring$teststring"; } >/dev/null 2>&1 &&
+	      test $i != 17 # 1/2 MB should be enough
+      do
+        i=`expr $i + 1`
+        teststring=$teststring$teststring
+      done
+      # Only check the string length outside the loop.
+      lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1`
+      teststring=
+      # Add a significant safety factor because C++ compilers can tack on
+      # massive amounts of additional arguments before passing them to the
+      # linker.  It appears as though 1/2 is a usable value.
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
+    fi
+    ;;
+  esac
+
+fi
+
+if test -n $lt_cv_sys_max_cmd_len ; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
+$as_echo "$lt_cv_sys_max_cmd_len" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5
+$as_echo "none" >&6; }
+fi
+max_cmd_len=$lt_cv_sys_max_cmd_len
+
+
+
+
+
+
+: ${CP="cp -f"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the shell understands some XSI constructs" >&5
+$as_echo_n "checking whether the shell understands some XSI constructs... " >&6; }
+# Try some XSI features
+xsi_shell=no
+( _lt_dummy="a/b/c"
+  test "${_lt_dummy##*/},${_lt_dummy%/*},"${_lt_dummy%"$_lt_dummy"}, \
+      = c,a/b,, \
+    && eval 'test $(( 1 + 1 )) -eq 2 \
+    && test "${#_lt_dummy}" -eq 5' ) >/dev/null 2>&1 \
+  && xsi_shell=yes
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $xsi_shell" >&5
+$as_echo "$xsi_shell" >&6; }
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the shell understands \"+=\"" >&5
+$as_echo_n "checking whether the shell understands \"+=\"... " >&6; }
+lt_shell_append=no
+( foo=bar; set foo baz; eval "$1+=\$2" && test "$foo" = barbaz ) \
+    >/dev/null 2>&1 \
+  && lt_shell_append=yes
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_shell_append" >&5
+$as_echo "$lt_shell_append" >&6; }
+
+
+if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  lt_unset=unset
+else
+  lt_unset=false
+fi
+
+
+
+
+
+# test EBCDIC or ASCII
+case `echo X|tr X '\101'` in
+ A) # ASCII based system
+    # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr
+  lt_SP2NL='tr \040 \012'
+  lt_NL2SP='tr \015\012 \040\040'
+  ;;
+ *) # EBCDIC based system
+  lt_SP2NL='tr \100 \n'
+  lt_NL2SP='tr \r\n \100\100'
+  ;;
+esac
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
+$as_echo_n "checking for $LD option to reload object files... " >&6; }
+if test "${lt_cv_ld_reload_flag+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ld_reload_flag='-r'
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
+$as_echo "$lt_cv_ld_reload_flag" >&6; }
+reload_flag=$lt_cv_ld_reload_flag
+case $reload_flag in
+"" | " "*) ;;
+*) reload_flag=" $reload_flag" ;;
+esac
+reload_cmds='$LD$reload_flag -o $output$reload_objs'
+case $host_os in
+  darwin*)
+    if test "$GCC" = yes; then
+      reload_cmds='$LTCC $LTCFLAGS -nostdlib ${wl}-r -o $output$reload_objs'
+    else
+      reload_cmds='$LD$reload_flag -o $output$reload_objs'
+    fi
+    ;;
+esac
+
+
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
+set dummy ${ac_tool_prefix}objdump; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_OBJDUMP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OBJDUMP"; then
+  ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OBJDUMP=$ac_cv_prog_OBJDUMP
+if test -n "$OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+$as_echo "$OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OBJDUMP"; then
+  ac_ct_OBJDUMP=$OBJDUMP
+  # Extract the first word of "objdump", so it can be a program name with args.
+set dummy objdump; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_OBJDUMP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OBJDUMP"; then
+  ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_OBJDUMP="objdump"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
+if test -n "$ac_ct_OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
+$as_echo "$ac_ct_OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OBJDUMP" = x; then
+    OBJDUMP="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OBJDUMP=$ac_ct_OBJDUMP
+  fi
+else
+  OBJDUMP="$ac_cv_prog_OBJDUMP"
+fi
+
+test -z "$OBJDUMP" && OBJDUMP=objdump
+
+
+
+
+
+
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
+$as_echo_n "checking how to recognize dependent libraries... " >&6; }
+if test "${lt_cv_deplibs_check_method+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_file_magic_cmd='$MAGIC_CMD'
+lt_cv_file_magic_test_file=
+lt_cv_deplibs_check_method='unknown'
+# Need to set the preceding variable on all platforms that support
+# interlibrary dependencies.
+# 'none' -- dependencies not supported.
+# `unknown' -- same as none, but documents that we really don't know.
+# 'pass_all' -- all dependencies passed with no checks.
+# 'test_compile' -- check by making test program.
+# 'file_magic [[regex]]' -- check by looking for files in library path
+# which responds to the $file_magic_cmd with a given extended regex.
+# If you have `file' or equivalent on your system and you're not sure
+# whether `pass_all' will *always* work, you probably want this one.
+
+case $host_os in
+aix[4-9]*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+beos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+bsdi[45]*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib)'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  ;;
+
+cygwin*)
+  # func_win32_libid is a shell function defined in ltmain.sh
+  lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  lt_cv_file_magic_cmd='func_win32_libid'
+  ;;
+
+mingw* | pw32*)
+  # Base MSYS/MinGW do not provide the 'file' command needed by
+  # func_win32_libid shell function, so use a weaker test based on 'objdump',
+  # unless we find 'file', for example because we are cross-compiling.
+  if ( file / ) >/dev/null 2>&1; then
+    lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+    lt_cv_file_magic_cmd='func_win32_libid'
+  else
+    lt_cv_deplibs_check_method='file_magic file format pei*-i386(.*architecture: i386)?'
+    lt_cv_file_magic_cmd='$OBJDUMP -f'
+  fi
+  ;;
+
+cegcc)
+  # use the weaker test based on 'objdump'. See mingw*.
+  lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?'
+  lt_cv_file_magic_cmd='$OBJDUMP -f'
+  ;;
+
+darwin* | rhapsody*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+freebsd* | dragonfly*)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    case $host_cpu in
+    i*86 )
+      # Not sure whether the presence of OpenBSD here was a mistake.
+      # Let's accept both of them until this is cleared up.
+      lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[3-9]86 (compact )?demand paged shared library'
+      lt_cv_file_magic_cmd=/usr/bin/file
+      lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*`
+      ;;
+    esac
+  else
+    lt_cv_deplibs_check_method=pass_all
+  fi
+  ;;
+
+gnu*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+hpux10.20* | hpux11*)
+  lt_cv_file_magic_cmd=/usr/bin/file
+  case $host_cpu in
+  ia64*)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - IA64'
+    lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so
+    ;;
+  hppa*64*)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - PA-RISC [0-9].[0-9]'
+    lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl
+    ;;
+  *)
+    lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|PA-RISC[0-9].[0-9]) shared library'
+    lt_cv_file_magic_test_file=/usr/lib/libc.sl
+    ;;
+  esac
+  ;;
+
+interix[3-9]*)
+  # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here
+  lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|\.a)$'
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $LD in
+  *-32|*"-32 ") libmagic=32-bit;;
+  *-n32|*"-n32 ") libmagic=N32;;
+  *-64|*"-64 ") libmagic=64-bit;;
+  *) libmagic=never-match;;
+  esac
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+# This must be Linux ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+netbsd* | netbsdelf*-gnu)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so|_pic\.a)$'
+  fi
+  ;;
+
+newos6*)
+  lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (executable|dynamic lib)'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libnls.so
+  ;;
+
+*nto* | *qnx*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+openbsd*)
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|\.so|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[^/]+(\.so\.[0-9]+\.[0-9]+|_pic\.a)$'
+  fi
+  ;;
+
+osf3* | osf4* | osf5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+rdos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+solaris*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv4 | sysv4.3*)
+  case $host_vendor in
+  motorola)
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [ML]SB (shared object|dynamic lib) M[0-9][0-9]* Version [0-9]'
+    lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*`
+    ;;
+  ncr)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  sequent)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method='file_magic ELF [0-9][0-9]*-bit [LM]SB (shared object|dynamic lib )'
+    ;;
+  sni)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method="file_magic ELF [0-9][0-9]*-bit [LM]SB dynamic lib"
+    lt_cv_file_magic_test_file=/lib/libc.so
+    ;;
+  siemens)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  pc)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  esac
+  ;;
+
+tpf*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+esac
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
+$as_echo "$lt_cv_deplibs_check_method" >&6; }
+file_magic_cmd=$lt_cv_file_magic_cmd
+deplibs_check_method=$lt_cv_deplibs_check_method
+test -z "$deplibs_check_method" && deplibs_check_method=unknown
+
+
+
+
+
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ar; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_AR+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_AR="${ac_tool_prefix}ar"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_AR"; then
+  ac_ct_AR=$AR
+  # Extract the first word of "ar", so it can be a program name with args.
+set dummy ar; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_AR+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_AR="ar"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_AR" = x; then
+    AR="false"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+else
+  AR="$ac_cv_prog_AR"
+fi
+
+test -z "$AR" && AR=ar
+test -z "$AR_FLAGS" && AR_FLAGS=cru
+
+
+
+
+
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
+set dummy ${ac_tool_prefix}strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_STRIP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_STRIP"; then
+  ac_ct_STRIP=$STRIP
+  # Extract the first word of "strip", so it can be a program name with args.
+set dummy strip; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_STRIP="strip"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+$as_echo "$ac_ct_STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+else
+  STRIP="$ac_cv_prog_STRIP"
+fi
+
+test -z "$STRIP" && STRIP=:
+
+
+
+
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_RANLIB+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+RANLIB=$ac_cv_prog_RANLIB
+if test -n "$RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+$as_echo "$RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_RANLIB"; then
+  ac_ct_RANLIB=$RANLIB
+  # Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_RANLIB"; then
+  ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_RANLIB="ranlib"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
+if test -n "$ac_ct_RANLIB"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+$as_echo "$ac_ct_RANLIB" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_RANLIB" = x; then
+    RANLIB=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    RANLIB=$ac_ct_RANLIB
+  fi
+else
+  RANLIB="$ac_cv_prog_RANLIB"
+fi
+
+test -z "$RANLIB" && RANLIB=:
+
+
+
+
+
+
+# Determine commands to create old-style static archives.
+old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs'
+old_postinstall_cmds='chmod 644 $oldlib'
+old_postuninstall_cmds=
+
+if test -n "$RANLIB"; then
+  case $host_os in
+  openbsd*)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$oldlib"
+    ;;
+  *)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$oldlib"
+    ;;
+  esac
+  old_archive_cmds="$old_archive_cmds~\$RANLIB \$oldlib"
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+
+
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
+$as_echo_n "checking command to parse $NM output from $compiler object... " >&6; }
+if test "${lt_cv_sys_global_symbol_pipe+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+# These are sane defaults that work on at least a few old systems.
+# [They come from Ultrix.  What could be older than Ultrix?!! ;)]
+
+# Character class describing NM global symbol codes.
+symcode='[BCDEGRST]'
+
+# Regexp to match symbols that can be accessed directly from C.
+sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
+
+# Define system-specific variables.
+case $host_os in
+aix*)
+  symcode='[BCDT]'
+  ;;
+cygwin* | mingw* | pw32* | cegcc*)
+  symcode='[ABCDGISTW]'
+  ;;
+hpux*)
+  if test "$host_cpu" = ia64; then
+    symcode='[ABCDEGRST]'
+  fi
+  ;;
+irix* | nonstopux*)
+  symcode='[BCDEGRST]'
+  ;;
+osf*)
+  symcode='[BCDEGQRST]'
+  ;;
+solaris*)
+  symcode='[BDRT]'
+  ;;
+sco3.2v5*)
+  symcode='[DT]'
+  ;;
+sysv4.2uw2*)
+  symcode='[DT]'
+  ;;
+sysv5* | sco5v6* | unixware* | OpenUNIX*)
+  symcode='[ABDT]'
+  ;;
+sysv4)
+  symcode='[DFNSTU]'
+  ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+case `$NM -V 2>&1` in
+*GNU* | *'with BFD'*)
+  symcode='[ABCDGIRSTW]' ;;
+esac
+
+# Transform an extracted symbol line into a proper C declaration.
+# Some systems (esp. on ia64) link data and code symbols differently,
+# so use this general approach.
+lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'"
+
+# Transform an extracted symbol line into symbol name and symbol address
+lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([^ ]*\) $/  {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([^ ]*\) \([^ ]*\)$/  {\"\2\", (void *) \&\2},/p'"
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \([^ ]*\) $/  {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([^ ]*\) \(lib[^ ]*\)$/  {\"\2\", (void *) \&\2},/p' -e 's/^$symcode* \([^ ]*\) \([^ ]*\)$/  {\"lib\2\", (void *) \&\2},/p'"
+
+# Handle CRLF in mingw tool chain
+opt_cr=
+case $build_os in
+mingw*)
+  opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp
+  ;;
+esac
+
+# Try without a prefix underscore, then with it.
+for ac_symprfx in "" "_"; do
+
+  # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol.
+  symxfrm="\\1 $ac_symprfx\\2 \\2"
+
+  # Write the raw and C identifiers.
+  if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+    # Fake it for dumpbin and say T for any non-static function
+    # and D for any global variable.
+    # Also find C++ and __fastcall symbols from MSVC++,
+    # which start with @ or ?.
+    lt_cv_sys_global_symbol_pipe="$AWK '"\
+"     {last_section=section; section=\$ 3};"\
+"     /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\
+"     \$ 0!~/External *\|/{next};"\
+"     / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\
+"     {if(hide[section]) next};"\
+"     {f=0}; \$ 0~/\(\).*\|/{f=1}; {printf f ? \"T \" : \"D \"};"\
+"     {split(\$ 0, a, /\||\r/); split(a[2], s)};"\
+"     s[1]~/^[@?]/{print s[1], s[1]; next};"\
+"     s[1]~prfx {split(s[1],t,\"@\"); print t[1], substr(t[1],length(prfx))}"\
+"     ' prfx=^$ac_symprfx"
+  else
+    lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[	 ]\($symcode$symcode*\)[	 ][	 ]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'"
+  fi
+
+  # Check to see that the pipe works correctly.
+  pipe_works=no
+
+  rm -f conftest*
+  cat > conftest.$ac_ext <<_LT_EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(void);
+void nm_test_func(void){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func();return(0);}
+_LT_EOF
+
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    # Now try to grab the symbols.
+    nlist=conftest.nm
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist\""; } >&5
+  (eval $NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s "$nlist"; then
+      # Try sorting and uniquifying the output.
+      if sort "$nlist" | uniq > "$nlist"T; then
+	mv -f "$nlist"T "$nlist"
+      else
+	rm -f "$nlist"T
+      fi
+
+      # Make sure that we snagged all the symbols we need.
+      if $GREP ' nm_test_var$' "$nlist" >/dev/null; then
+	if $GREP ' nm_test_func$' "$nlist" >/dev/null; then
+	  cat <<_LT_EOF > conftest.$ac_ext
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LT_EOF
+	  # Now generate the symbol file.
+	  eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext'
+
+	  cat <<_LT_EOF >> conftest.$ac_ext
+
+/* The mapping between symbol names and symbols.  */
+const struct {
+  const char *name;
+  void       *address;
+}
+lt__PROGRAM__LTX_preloaded_symbols[] =
+{
+  { "@PROGRAM@", (void *) 0 },
+_LT_EOF
+	  $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/  {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext
+	  cat <<\_LT_EOF >> conftest.$ac_ext
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt__PROGRAM__LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+_LT_EOF
+	  # Now try linking the two files.
+	  mv conftest.$ac_objext conftstm.$ac_objext
+	  lt_save_LIBS="$LIBS"
+	  lt_save_CFLAGS="$CFLAGS"
+	  LIBS="conftstm.$ac_objext"
+	  CFLAGS="$CFLAGS$lt_prog_compiler_no_builtin_flag"
+	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext}; then
+	    pipe_works=yes
+	  fi
+	  LIBS="$lt_save_LIBS"
+	  CFLAGS="$lt_save_CFLAGS"
+	else
+	  echo "cannot find nm_test_func in $nlist" >&5
+	fi
+      else
+	echo "cannot find nm_test_var in $nlist" >&5
+      fi
+    else
+      echo "cannot run $lt_cv_sys_global_symbol_pipe" >&5
+    fi
+  else
+    echo "$progname: failed program was:" >&5
+    cat conftest.$ac_ext >&5
+  fi
+  rm -rf conftest* conftst*
+
+  # Do not use the global_symbol_pipe unless it works.
+  if test "$pipe_works" = yes; then
+    break
+  else
+    lt_cv_sys_global_symbol_pipe=
+  fi
+done
+
+fi
+
+if test -z "$lt_cv_sys_global_symbol_pipe"; then
+  lt_cv_sys_global_symbol_to_cdecl=
+fi
+if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+$as_echo "failed" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+# Check whether --enable-libtool-lock was given.
+if test "${enable_libtool_lock+set}" = set; then :
+  enableval=$enable_libtool_lock;
+fi
+
+test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
+
+# Some flags need to be propagated to the compiler or linker for good
+# libtool support.
+case $host in
+ia64-*-hpux*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.$ac_objext` in
+      *ELF-32*)
+	HPUX_IA64_MODE="32"
+	;;
+      *ELF-64*)
+	HPUX_IA64_MODE="64"
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+*-*-irix6*)
+  # Find out which ABI we are using.
+  echo '#line 6679 "configure"' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    if test "$lt_cv_prog_gnu_ld" = yes; then
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -melf32bsmip"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -melf32bmipn32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -melf64bmip"
+	;;
+      esac
+    else
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -32"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -n32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -64"
+	  ;;
+      esac
+    fi
+  fi
+  rm -rf conftest*
+  ;;
+
+x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \
+s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.o` in
+      *32-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_i386_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_i386"
+	    ;;
+	  ppc64-*linux*|powerpc64-*linux*)
+	    LD="${LD-ld} -m elf32ppclinux"
+	    ;;
+	  s390x-*linux*)
+	    LD="${LD-ld} -m elf_s390"
+	    ;;
+	  sparc64-*linux*)
+	    LD="${LD-ld} -m elf32_sparc"
+	    ;;
+	esac
+	;;
+      *64-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_x86_64_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_x86_64"
+	    ;;
+	  ppc*-*linux*|powerpc*-*linux*)
+	    LD="${LD-ld} -m elf64ppc"
+	    ;;
+	  s390*-*linux*|s390*-*tpf*)
+	    LD="${LD-ld} -m elf64_s390"
+	    ;;
+	  sparc*-*linux*)
+	    LD="${LD-ld} -m elf64_sparc"
+	    ;;
+	esac
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+*-*-sco3.2v5*)
+  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
+  SAVE_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -belf"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
+$as_echo_n "checking whether the C compiler needs -belf... " >&6; }
+if test "${lt_cv_cc_needs_belf+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  lt_cv_cc_needs_belf=yes
+else
+  lt_cv_cc_needs_belf=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+     ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
+$as_echo "$lt_cv_cc_needs_belf" >&6; }
+  if test x"$lt_cv_cc_needs_belf" != x"yes"; then
+    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
+    CFLAGS="$SAVE_CFLAGS"
+  fi
+  ;;
+sparc*-*solaris*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+    case `/usr/bin/file conftest.o` in
+    *64-bit*)
+      case $lt_cv_prog_gnu_ld in
+      yes*) LD="${LD-ld} -m elf64_sparc" ;;
+      *)
+	if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then
+	  LD="${LD-ld} -64"
+	fi
+	;;
+      esac
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+esac
+
+need_locks="$enable_libtool_lock"
+
+
+  case $host_os in
+    rhapsody* | darwin*)
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args.
+set dummy ${ac_tool_prefix}dsymutil; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_DSYMUTIL+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$DSYMUTIL"; then
+  ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+DSYMUTIL=$ac_cv_prog_DSYMUTIL
+if test -n "$DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+$as_echo "$DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_DSYMUTIL"; then
+  ac_ct_DSYMUTIL=$DSYMUTIL
+  # Extract the first word of "dsymutil", so it can be a program name with args.
+set dummy dsymutil; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_DSYMUTIL+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_DSYMUTIL"; then
+  ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_DSYMUTIL="dsymutil"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL
+if test -n "$ac_ct_DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
+$as_echo "$ac_ct_DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_DSYMUTIL" = x; then
+    DSYMUTIL=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    DSYMUTIL=$ac_ct_DSYMUTIL
+  fi
+else
+  DSYMUTIL="$ac_cv_prog_DSYMUTIL"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args.
+set dummy ${ac_tool_prefix}nmedit; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_NMEDIT+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NMEDIT"; then
+  ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+NMEDIT=$ac_cv_prog_NMEDIT
+if test -n "$NMEDIT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
+$as_echo "$NMEDIT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_NMEDIT"; then
+  ac_ct_NMEDIT=$NMEDIT
+  # Extract the first word of "nmedit", so it can be a program name with args.
+set dummy nmedit; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_NMEDIT+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_NMEDIT"; then
+  ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_NMEDIT="nmedit"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT
+if test -n "$ac_ct_NMEDIT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
+$as_echo "$ac_ct_NMEDIT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_NMEDIT" = x; then
+    NMEDIT=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    NMEDIT=$ac_ct_NMEDIT
+  fi
+else
+  NMEDIT="$ac_cv_prog_NMEDIT"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args.
+set dummy ${ac_tool_prefix}lipo; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_LIPO+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LIPO"; then
+  ac_cv_prog_LIPO="$LIPO" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_LIPO="${ac_tool_prefix}lipo"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+LIPO=$ac_cv_prog_LIPO
+if test -n "$LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+$as_echo "$LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_LIPO"; then
+  ac_ct_LIPO=$LIPO
+  # Extract the first word of "lipo", so it can be a program name with args.
+set dummy lipo; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_LIPO+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_LIPO"; then
+  ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_LIPO="lipo"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO
+if test -n "$ac_ct_LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
+$as_echo "$ac_ct_LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_LIPO" = x; then
+    LIPO=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    LIPO=$ac_ct_LIPO
+  fi
+else
+  LIPO="$ac_cv_prog_LIPO"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args.
+set dummy ${ac_tool_prefix}otool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_OTOOL+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OTOOL"; then
+  ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_OTOOL="${ac_tool_prefix}otool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OTOOL=$ac_cv_prog_OTOOL
+if test -n "$OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+$as_echo "$OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OTOOL"; then
+  ac_ct_OTOOL=$OTOOL
+  # Extract the first word of "otool", so it can be a program name with args.
+set dummy otool; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_OTOOL+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OTOOL"; then
+  ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_OTOOL="otool"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL
+if test -n "$ac_ct_OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
+$as_echo "$ac_ct_OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OTOOL" = x; then
+    OTOOL=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OTOOL=$ac_ct_OTOOL
+  fi
+else
+  OTOOL="$ac_cv_prog_OTOOL"
+fi
+
+    if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args.
+set dummy ${ac_tool_prefix}otool64; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_OTOOL64+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OTOOL64"; then
+  ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OTOOL64=$ac_cv_prog_OTOOL64
+if test -n "$OTOOL64"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
+$as_echo "$OTOOL64" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_OTOOL64"; then
+  ac_ct_OTOOL64=$OTOOL64
+  # Extract the first word of "otool64", so it can be a program name with args.
+set dummy otool64; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_OTOOL64+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OTOOL64"; then
+  ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_OTOOL64="otool64"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64
+if test -n "$ac_ct_OTOOL64"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
+$as_echo "$ac_ct_OTOOL64" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_OTOOL64" = x; then
+    OTOOL64=":"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OTOOL64=$ac_ct_OTOOL64
+  fi
+else
+  OTOOL64="$ac_cv_prog_OTOOL64"
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
+$as_echo_n "checking for -single_module linker flag... " >&6; }
+if test "${lt_cv_apple_cc_single_mod+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_apple_cc_single_mod=no
+      if test -z "${LT_MULTI_MODULE}"; then
+	# By default we will add the -single_module flag. You can override
+	# by either setting the environment variable LT_MULTI_MODULE
+	# non-empty at configure time, or by adding -multi_module to the
+	# link flags.
+	rm -rf libconftest.dylib*
+	echo "int foo(void){return 1;}" > conftest.c
+	echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+-dynamiclib -Wl,-single_module conftest.c" >&5
+	$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+	  -dynamiclib -Wl,-single_module conftest.c 2>conftest.err
+        _lt_result=$?
+	if test -f libconftest.dylib && test ! -s conftest.err && test $_lt_result = 0; then
+	  lt_cv_apple_cc_single_mod=yes
+	else
+	  cat conftest.err >&5
+	fi
+	rm -rf libconftest.dylib*
+	rm -f conftest.*
+      fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
+$as_echo "$lt_cv_apple_cc_single_mod" >&6; }
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
+$as_echo_n "checking for -exported_symbols_list linker flag... " >&6; }
+if test "${lt_cv_ld_exported_symbols_list+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_ld_exported_symbols_list=no
+      save_LDFLAGS=$LDFLAGS
+      echo "_main" > conftest.sym
+      LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  lt_cv_ld_exported_symbols_list=yes
+else
+  lt_cv_ld_exported_symbols_list=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+	LDFLAGS="$save_LDFLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
+$as_echo "$lt_cv_ld_exported_symbols_list" >&6; }
+    case $host_os in
+    rhapsody* | darwin1.[012])
+      _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;;
+    darwin1.*)
+      _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
+    darwin*) # darwin 5.x on
+      # if running on 10.5 or later, the deployment target defaults
+      # to the OS version, if on x86, and 10.4, the deployment
+      # target defaults to 10.4. Don't you love it?
+      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+	10.0,*86*-darwin8*|10.0,*-darwin[91]*)
+	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+	10.[012]*)
+	  _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
+	10.*)
+	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+      esac
+    ;;
+  esac
+    if test "$lt_cv_apple_cc_single_mod" = "yes"; then
+      _lt_dar_single_mod='$single_module'
+    fi
+    if test "$lt_cv_ld_exported_symbols_list" = "yes"; then
+      _lt_dar_export_syms=' ${wl}-exported_symbols_list,$output_objdir/${libname}-symbols.expsym'
+    else
+      _lt_dar_export_syms='~$NMEDIT -s $output_objdir/${libname}-symbols.expsym ${lib}'
+    fi
+    if test "$DSYMUTIL" != ":"; then
+      _lt_dsymutil='~$DSYMUTIL $lib || :'
+    else
+      _lt_dsymutil=
+    fi
+    ;;
+  esac
+
+for ac_header in dlfcn.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_dlfcn_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_DLFCN_H 1
+_ACEOF
+
+fi
+
+done
+
+
+
+# Set options
+
+
+
+        enable_dlopen=no
+
+
+  enable_win32_dll=no
+
+
+            # Check whether --enable-shared was given.
+if test "${enable_shared+set}" = set; then :
+  enableval=$enable_shared; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_shared=yes ;;
+    no) enable_shared=no ;;
+    *)
+      enable_shared=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_shared=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac
+else
+  enable_shared=yes
+fi
+
+
+
+
+
+
+
+
+
+  # Check whether --enable-static was given.
+if test "${enable_static+set}" = set; then :
+  enableval=$enable_static; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_static=yes ;;
+    no) enable_static=no ;;
+    *)
+     enable_static=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_static=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac
+else
+  enable_static=yes
+fi
+
+
+
+
+
+
+
+
+
+
+# Check whether --with-pic was given.
+if test "${with_pic+set}" = set; then :
+  withval=$with_pic; pic_mode="$withval"
+else
+  pic_mode=default
+fi
+
+
+test -z "$pic_mode" && pic_mode=default
+
+
+
+
+
+
+
+  # Check whether --enable-fast-install was given.
+if test "${enable_fast_install+set}" = set; then :
+  enableval=$enable_fast_install; p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_fast_install=yes ;;
+    no) enable_fast_install=no ;;
+    *)
+      enable_fast_install=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_fast_install=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac
+else
+  enable_fast_install=yes
+fi
+
+
+
+
+
+
+
+
+
+
+
+# This can be used to rebuild libtool when needed
+LIBTOOL_DEPS="$ltmain"
+
+# Always use our own libtool.
+LIBTOOL='$(SHELL) $(top_builddir)/libtool'
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+test -z "$LN_S" && LN_S="ln -s"
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+if test -n "${ZSH_VERSION+set}" ; then
+   setopt NO_GLOB_SUBST
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
+$as_echo_n "checking for objdir... " >&6; }
+if test "${lt_cv_objdir+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  rm -f .libs 2>/dev/null
+mkdir .libs 2>/dev/null
+if test -d .libs; then
+  lt_cv_objdir=.libs
+else
+  # MS-DOS does not allow filenames that begin with a dot.
+  lt_cv_objdir=_libs
+fi
+rmdir .libs 2>/dev/null
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
+$as_echo "$lt_cv_objdir" >&6; }
+objdir=$lt_cv_objdir
+
+
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define LT_OBJDIR "$lt_cv_objdir/"
+_ACEOF
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+case $host_os in
+aix3*)
+  # AIX sometimes has problems with the GCC collect2 program.  For some
+  # reason, if we set the COLLECT_NAMES environment variable, the problems
+  # vanish in a puff of smoke.
+  if test "X${COLLECT_NAMES+set}" != Xset; then
+    COLLECT_NAMES=
+    export COLLECT_NAMES
+  fi
+  ;;
+esac
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\(["`$\\]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\(["`\\]\)/\\\1/g'
+
+# Sed substitution to delay expansion of an escaped shell variable in a
+# double_quote_subst'ed string.
+delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g'
+
+# Sed substitution to delay expansion of an escaped single quote.
+delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g'
+
+# Sed substitution to avoid accidental globbing in evaled expressions
+no_glob_subst='s/\*/\\\*/g'
+
+# Global variables:
+ofile=libtool
+can_build_shared=yes
+
+# All known linkers require a `.a' archive for static linking (except MSVC,
+# which needs '.lib').
+libext=a
+
+with_gnu_ld="$lt_cv_prog_gnu_ld"
+
+old_CC="$CC"
+old_CFLAGS="$CFLAGS"
+
+# Set sane defaults for various variables
+test -z "$CC" && CC=cc
+test -z "$LTCC" && LTCC=$CC
+test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS
+test -z "$LD" && LD=ld
+test -z "$ac_objext" && ac_objext=o
+
+for cc_temp in $compiler""; do
+  case $cc_temp in
+    compile | *[\\/]compile | ccache | *[\\/]ccache ) ;;
+    distcc | *[\\/]distcc | purify | *[\\/]purify ) ;;
+    \-*) ;;
+    *) break;;
+  esac
+done
+cc_basename=`$ECHO "X$cc_temp" | $Xsed -e 's%.*/%%' -e "s%^$host_alias-%%"`
+
+
+# Only perform the check for file, if the check method requires it
+test -z "$MAGIC_CMD" && MAGIC_CMD=file
+case $deplibs_check_method in
+file_magic*)
+  if test "$file_magic_cmd" = '$MAGIC_CMD'; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
+$as_echo_n "checking for ${ac_tool_prefix}file... " >&6; }
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MAGIC_CMD in
+[\\/*] |  ?:[\\/]*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD="$MAGIC_CMD"
+  lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+  ac_dummy="/usr/bin$PATH_SEPARATOR$PATH"
+  for ac_dir in $ac_dummy; do
+    IFS="$lt_save_ifs"
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/${ac_tool_prefix}file; then
+      lt_cv_path_MAGIC_CMD="$ac_dir/${ac_tool_prefix}file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS="$lt_save_ifs"
+  MAGIC_CMD="$lt_save_MAGIC_CMD"
+  ;;
+esac
+fi
+
+MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+if test -n "$MAGIC_CMD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+$as_echo "$MAGIC_CMD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+
+
+
+if test -z "$lt_cv_path_MAGIC_CMD"; then
+  if test -n "$ac_tool_prefix"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for file" >&5
+$as_echo_n "checking for file... " >&6; }
+if test "${lt_cv_path_MAGIC_CMD+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MAGIC_CMD in
+[\\/*] |  ?:[\\/]*)
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD="$MAGIC_CMD"
+  lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+  ac_dummy="/usr/bin$PATH_SEPARATOR$PATH"
+  for ac_dir in $ac_dummy; do
+    IFS="$lt_save_ifs"
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/file; then
+      lt_cv_path_MAGIC_CMD="$ac_dir/file"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS="$lt_save_ifs"
+  MAGIC_CMD="$lt_save_MAGIC_CMD"
+  ;;
+esac
+fi
+
+MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+if test -n "$MAGIC_CMD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+$as_echo "$MAGIC_CMD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  else
+    MAGIC_CMD=:
+  fi
+fi
+
+  fi
+  ;;
+esac
+
+# Use C for the default configuration in the libtool script
+
+lt_save_CC="$CC"
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+# Source file extension for C test sources.
+ac_ext=c
+
+# Object file extension for compiled C test sources.
+objext=o
+objext=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="int some_variable = 0;"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='int main(){return(0);}'
+
+
+
+
+
+
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+
+# Save the default compiler, since it gets overwritten when the other
+# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP.
+compiler_DEFAULT=$CC
+
+# save warnings/boilerplate of simple test code
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_compile_test_code" >conftest.$ac_ext
+eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_compiler_boilerplate=`cat conftest.err`
+$RM conftest*
+
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_link_test_code" >conftest.$ac_ext
+eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_linker_boilerplate=`cat conftest.err`
+$RM -r conftest*
+
+
+## CAVEAT EMPTOR:
+## There is no encapsulation within the following macros, do not change
+## the running order or otherwise move them around unless you know exactly
+## what you are doing...
+if test -n "$compiler"; then
+
+lt_prog_compiler_no_builtin_flag=
+
+if test "$GCC" = yes; then
+  lt_prog_compiler_no_builtin_flag=' -fno-builtin'
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+$as_echo_n "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
+if test "${lt_cv_prog_compiler_rtti_exceptions+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_rtti_exceptions=no
+   ac_outfile=conftest.$ac_objext
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="-fno-rtti -fno-exceptions"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:7941: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&5
+   echo "$as_me:7945: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_rtti_exceptions=yes
+     fi
+   fi
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
+$as_echo "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
+
+if test x"$lt_cv_prog_compiler_rtti_exceptions" = xyes; then
+    lt_prog_compiler_no_builtin_flag="$lt_prog_compiler_no_builtin_flag -fno-rtti -fno-exceptions"
+else
+    :
+fi
+
+fi
+
+
+
+
+
+
+  lt_prog_compiler_wl=
+lt_prog_compiler_pic=
+lt_prog_compiler_static=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+$as_echo_n "checking for $compiler option to produce PIC... " >&6; }
+
+  if test "$GCC" = yes; then
+    lt_prog_compiler_wl='-Wl,'
+    lt_prog_compiler_static='-static'
+
+    case $host_os in
+      aix*)
+      # All AIX code is PIC.
+      if test "$host_cpu" = ia64; then
+	# AIX 5 now supports IA64 processor
+	lt_prog_compiler_static='-Bstatic'
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            lt_prog_compiler_pic='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the `-m68020' flag to GCC prevents building anything better,
+            # like `-m68040'.
+            lt_prog_compiler_pic='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      lt_prog_compiler_pic='-DDLL_EXPORT'
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      lt_prog_compiler_pic='-fno-common'
+      ;;
+
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	# +Z the default
+	;;
+      *)
+	lt_prog_compiler_pic='-fPIC'
+	;;
+      esac
+      ;;
+
+    interix[3-9]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+
+    msdosdjgpp*)
+      # Just because we use GCC doesn't mean we suddenly get shared libraries
+      # on systems that don't support them.
+      lt_prog_compiler_can_build_shared=no
+      enable_shared=no
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      lt_prog_compiler_pic='-fPIC -shared'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	lt_prog_compiler_pic=-Kconform_pic
+      fi
+      ;;
+
+    *)
+      lt_prog_compiler_pic='-fPIC'
+      ;;
+    esac
+  else
+    # PORTME Check for flag to pass linker flags through the system compiler.
+    case $host_os in
+    aix*)
+      lt_prog_compiler_wl='-Wl,'
+      if test "$host_cpu" = ia64; then
+	# AIX 5 now supports IA64 processor
+	lt_prog_compiler_static='-Bstatic'
+      else
+	lt_prog_compiler_static='-bnso -bI:/lib/syscalls.exp'
+      fi
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      lt_prog_compiler_pic='-DDLL_EXPORT'
+      ;;
+
+    hpux9* | hpux10* | hpux11*)
+      lt_prog_compiler_wl='-Wl,'
+      # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but
+      # not for PA HP-UX.
+      case $host_cpu in
+      hppa*64*|ia64*)
+	# +Z the default
+	;;
+      *)
+	lt_prog_compiler_pic='+Z'
+	;;
+      esac
+      # Is there a better lt_prog_compiler_static that works with the bundled CC?
+      lt_prog_compiler_static='${wl}-a ${wl}archive'
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      lt_prog_compiler_wl='-Wl,'
+      # PIC (with -KPIC) is the default.
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    linux* | k*bsd*-gnu | kopensolaris*-gnu)
+      case $cc_basename in
+      # old Intel for x86_64 which still supported -KPIC.
+      ecc*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-KPIC'
+	lt_prog_compiler_static='-static'
+        ;;
+      # icc used to be incompatible with GCC.
+      # ICC 10 doesn't accept -KPIC any more.
+      icc* | ifort*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-fPIC'
+	lt_prog_compiler_static='-static'
+        ;;
+      # Lahey Fortran 8.1.
+      lf95*)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='--shared'
+	lt_prog_compiler_static='--static'
+	;;
+      pgcc* | pgf77* | pgf90* | pgf95*)
+        # Portland Group compilers (*not* the Pentium gcc compiler,
+	# which looks to be a dead project)
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-fpic'
+	lt_prog_compiler_static='-Bstatic'
+        ;;
+      ccc*)
+        lt_prog_compiler_wl='-Wl,'
+        # All Alpha code is PIC.
+        lt_prog_compiler_static='-non_shared'
+        ;;
+      xl*)
+	# IBM XL C 8.0/Fortran 10.1 on PPC
+	lt_prog_compiler_wl='-Wl,'
+	lt_prog_compiler_pic='-qpic'
+	lt_prog_compiler_static='-qstaticlink'
+	;;
+      *)
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)
+	  # Sun C 5.9
+	  lt_prog_compiler_pic='-KPIC'
+	  lt_prog_compiler_static='-Bstatic'
+	  lt_prog_compiler_wl='-Wl,'
+	  ;;
+	*Sun\ F*)
+	  # Sun Fortran 8.3 passes all unrecognized flags to the linker
+	  lt_prog_compiler_pic='-KPIC'
+	  lt_prog_compiler_static='-Bstatic'
+	  lt_prog_compiler_wl=''
+	  ;;
+	esac
+	;;
+      esac
+      ;;
+
+    newsos6)
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      lt_prog_compiler_pic='-fPIC -shared'
+      ;;
+
+    osf3* | osf4* | osf5*)
+      lt_prog_compiler_wl='-Wl,'
+      # All OSF/1 code is PIC.
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    rdos*)
+      lt_prog_compiler_static='-non_shared'
+      ;;
+
+    solaris*)
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      case $cc_basename in
+      f77* | f90* | f95*)
+	lt_prog_compiler_wl='-Qoption ld ';;
+      *)
+	lt_prog_compiler_wl='-Wl,';;
+      esac
+      ;;
+
+    sunos4*)
+      lt_prog_compiler_wl='-Qoption ld '
+      lt_prog_compiler_pic='-PIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    sysv4 | sysv4.2uw2* | sysv4.3*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec ;then
+	lt_prog_compiler_pic='-Kconform_pic'
+	lt_prog_compiler_static='-Bstatic'
+      fi
+      ;;
+
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_pic='-KPIC'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    unicos*)
+      lt_prog_compiler_wl='-Wl,'
+      lt_prog_compiler_can_build_shared=no
+      ;;
+
+    uts4*)
+      lt_prog_compiler_pic='-pic'
+      lt_prog_compiler_static='-Bstatic'
+      ;;
+
+    *)
+      lt_prog_compiler_can_build_shared=no
+      ;;
+    esac
+  fi
+
+case $host_os in
+  # For platforms which do not support PIC, -DPIC is meaningless:
+  *djgpp*)
+    lt_prog_compiler_pic=
+    ;;
+  *)
+    lt_prog_compiler_pic="$lt_prog_compiler_pic -DPIC"
+    ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_prog_compiler_pic" >&5
+$as_echo "$lt_prog_compiler_pic" >&6; }
+
+
+
+
+
+
+#
+# Check to make sure the PIC flag actually works.
+#
+if test -n "$lt_prog_compiler_pic"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+$as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
+if test "${lt_cv_prog_compiler_pic_works+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_pic_works=no
+   ac_outfile=conftest.$ac_objext
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="$lt_prog_compiler_pic -DPIC"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:8280: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&5
+   echo "$as_me:8284: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_pic_works=yes
+     fi
+   fi
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
+$as_echo "$lt_cv_prog_compiler_pic_works" >&6; }
+
+if test x"$lt_cv_prog_compiler_pic_works" = xyes; then
+    case $lt_prog_compiler_pic in
+     "" | " "*) ;;
+     *) lt_prog_compiler_pic=" $lt_prog_compiler_pic" ;;
+     esac
+else
+    lt_prog_compiler_pic=
+     lt_prog_compiler_can_build_shared=no
+fi
+
+fi
+
+
+
+
+
+
+#
+# Check to make sure the static flag actually works.
+#
+wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+$as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
+if test "${lt_cv_prog_compiler_static_works+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_static_works=no
+   save_LDFLAGS="$LDFLAGS"
+   LDFLAGS="$LDFLAGS $lt_tmp_static_flag"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&5
+       $ECHO "X$_lt_linker_boilerplate" | $Xsed -e '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         lt_cv_prog_compiler_static_works=yes
+       fi
+     else
+       lt_cv_prog_compiler_static_works=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS="$save_LDFLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
+$as_echo "$lt_cv_prog_compiler_static_works" >&6; }
+
+if test x"$lt_cv_prog_compiler_static_works" = xyes; then
+    :
+else
+    lt_prog_compiler_static=
+fi
+
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if test "${lt_cv_prog_compiler_c_o+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:8385: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:8389: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if test "${lt_cv_prog_compiler_c_o+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  lt_cv_prog_compiler_c_o=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:8440: $lt_compile\"" >&5)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&5
+   echo "$as_me:8444: \$? = $ac_status" >&5
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       lt_cv_prog_compiler_c_o=yes
+     fi
+   fi
+   chmod u+w . 2>&5
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+
+
+
+
+hard_links="nottested"
+if test "$lt_cv_prog_compiler_c_o" = no && test "$need_locks" != no; then
+  # do not overwrite the value of need_locks provided by the user
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
+$as_echo_n "checking if we can lock with hard links... " >&6; }
+  hard_links=yes
+  $RM conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
+$as_echo "$hard_links" >&6; }
+  if test "$hard_links" = no; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&5
+$as_echo "$as_me: WARNING: \`$CC' does not support \`-c -o', so \`make -j' may be unsafe" >&2;}
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
+
+  runpath_var=
+  allow_undefined_flag=
+  always_export_symbols=no
+  archive_cmds=
+  archive_expsym_cmds=
+  compiler_needs_object=no
+  enable_shared_with_static_runtimes=no
+  export_dynamic_flag_spec=
+  export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  hardcode_automatic=no
+  hardcode_direct=no
+  hardcode_direct_absolute=no
+  hardcode_libdir_flag_spec=
+  hardcode_libdir_flag_spec_ld=
+  hardcode_libdir_separator=
+  hardcode_minus_L=no
+  hardcode_shlibpath_var=unsupported
+  inherit_rpath=no
+  link_all_deplibs=unknown
+  module_cmds=
+  module_expsym_cmds=
+  old_archive_from_new_cmds=
+  old_archive_from_expsyms_cmds=
+  thread_safe_flag_spec=
+  whole_archive_flag_spec=
+  # include_expsyms should be a list of space-separated symbols to be *always*
+  # included in the symbol list
+  include_expsyms=
+  # exclude_expsyms can be an extended regexp of symbols to exclude
+  # it will be wrapped by ` (' and `)$', so one must not match beginning or
+  # end of line.  Example: `a|bc|.*d.*' will exclude the symbols `a' and `bc',
+  # as well as any symbol that contains `d'.
+  exclude_expsyms='_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*'
+  # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out
+  # platforms (ab)use it in PIC code, but their linkers get confused if
+  # the symbol is explicitly referenced.  Since portable code cannot
+  # rely on this symbol name, it's probably fine to never include it in
+  # preloaded symbol tables.
+  # Exclude shared library initialization/finalization symbols.
+  extract_expsyms_cmds=
+
+  case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    # FIXME: the MSVC++ port hasn't been tested in a loooong time
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    if test "$GCC" != yes; then
+      with_gnu_ld=no
+    fi
+    ;;
+  interix*)
+    # we just hope/assume this is gcc and not c89 (= MSVC++)
+    with_gnu_ld=yes
+    ;;
+  openbsd*)
+    with_gnu_ld=no
+    ;;
+  linux* | k*bsd*-gnu)
+    link_all_deplibs=no
+    ;;
+  esac
+
+  ld_shlibs=yes
+  if test "$with_gnu_ld" = yes; then
+    # If archive_cmds runs LD, not CC, wlarc should be empty
+    wlarc='${wl}'
+
+    # Set some defaults for GNU ld with shared library support. These
+    # are reset later if shared libraries are not supported. Putting them
+    # here allows them to be overridden if necessary.
+    runpath_var=LD_RUN_PATH
+    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+    export_dynamic_flag_spec='${wl}--export-dynamic'
+    # ancient GNU ld didn't support --whole-archive et. al.
+    if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then
+      whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
+    else
+      whole_archive_flag_spec=
+    fi
+    supports_anon_versioning=no
+    case `$LD -v 2>&1` in
+      *GNU\ gold*) supports_anon_versioning=yes ;;
+      *\ [01].* | *\ 2.[0-9].* | *\ 2.10.*) ;; # catch versions < 2.11
+      *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
+      *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ...
+      *\ 2.11.*) ;; # other 2.11 versions
+      *) supports_anon_versioning=yes ;;
+    esac
+
+    # See if GNU ld supports shared libraries.
+    case $host_os in
+    aix[3-9]*)
+      # On AIX/PPC, the GNU linker is very broken
+      if test "$host_cpu" != ia64; then
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: the GNU linker, at least up to release 2.9.1, is reported
+*** to be unable to reliably create shared libraries on AIX.
+*** Therefore, libtool is disabling shared libraries support.  If you
+*** really care for shared libraries, you may want to modify your PATH
+*** so that a non-GNU linker is found, and then restart.
+
+_LT_EOF
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+            archive_expsym_cmds=''
+        ;;
+      m68k)
+            archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            hardcode_libdir_flag_spec='-L$libdir'
+            hardcode_minus_L=yes
+        ;;
+      esac
+      ;;
+
+    beos*)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	allow_undefined_flag=unsupported
+	# Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	# support --undefined.  This deserves some investigation.  FIXME
+	archive_cmds='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # _LT_TAGVAR(hardcode_libdir_flag_spec, ) is actually meaningless,
+      # as there is no search path for DLLs.
+      hardcode_libdir_flag_spec='-L$libdir'
+      allow_undefined_flag=unsupported
+      always_export_symbols=no
+      enable_shared_with_static_runtimes=yes
+      export_symbols_cmds='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[BCDGRS][ ]/s/.*[ ]\([^ ]*\)/\1 DATA/'\'' | $SED -e '\''/^[AITW][ ]/s/.*[ ]//'\'' | sort | uniq > $export_symbols'
+
+      if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+        archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	# If the export-symbols file already is a .def file (1st line
+	# is EXPORTS), use it as is; otherwise, prepend...
+	archive_expsym_cmds='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then
+	  cp $export_symbols $output_objdir/$soname.def;
+	else
+	  echo EXPORTS > $output_objdir/$soname.def;
+	  cat $export_symbols >> $output_objdir/$soname.def;
+	fi~
+	$CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    interix[3-9]*)
+      hardcode_direct=no
+      hardcode_shlibpath_var=no
+      hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+      export_dynamic_flag_spec='${wl}-E'
+      # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+      # Instead, shared libraries are loaded at an image base (0x10000000 by
+      # default) and relocated if they conflict, which is a slow very memory
+      # consuming and fragmenting process.  To avoid this, we pick a random,
+      # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+      # time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+      archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      archive_expsym_cmds='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      ;;
+
+    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+      tmp_diet=no
+      if test "$host_os" = linux-dietlibc; then
+	case $cc_basename in
+	  diet\ *) tmp_diet=yes;;	# linux-dietlibc with static linking (!diet-dyn)
+	esac
+      fi
+      if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \
+	 && test "$tmp_diet" = no
+      then
+	tmp_addflag=
+	tmp_sharedflag='-shared'
+	case $cc_basename,$host_cpu in
+        pgcc*)				# Portland Group C compiler
+	  whole_archive_flag_spec='${wl}--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  tmp_addflag=' $pic_flag'
+	  ;;
+	pgf77* | pgf90* | pgf95*)	# Portland Group f77 and f90 compilers
+	  whole_archive_flag_spec='${wl}--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  tmp_addflag=' $pic_flag -Mnomain' ;;
+	ecc*,ia64* | icc*,ia64*)	# Intel C compiler on ia64
+	  tmp_addflag=' -i_dynamic' ;;
+	efc*,ia64* | ifort*,ia64*)	# Intel Fortran compiler on ia64
+	  tmp_addflag=' -i_dynamic -nofor_main' ;;
+	ifc* | ifort*)			# Intel Fortran compiler
+	  tmp_addflag=' -nofor_main' ;;
+	lf95*)				# Lahey Fortran 8.1
+	  whole_archive_flag_spec=
+	  tmp_sharedflag='--shared' ;;
+	xl[cC]*)			# IBM XL C 8.0 on PPC (deal with xlf below)
+	  tmp_sharedflag='-qmkshrobj'
+	  tmp_addflag= ;;
+	esac
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)			# Sun C 5.9
+	  whole_archive_flag_spec='${wl}--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  compiler_needs_object=yes
+	  tmp_sharedflag='-G' ;;
+	*Sun\ F*)			# Sun Fortran 8.3
+	  tmp_sharedflag='-G' ;;
+	esac
+	archive_cmds='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+
+        if test "x$supports_anon_versioning" = xyes; then
+          archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
+	    cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+	    echo "local: *; };" >> $output_objdir/$libname.ver~
+	    $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'
+        fi
+
+	case $cc_basename in
+	xlf*)
+	  # IBM XL Fortran 10.1 on PPC cannot create shared libs itself
+	  whole_archive_flag_spec='--whole-archive$convenience --no-whole-archive'
+	  hardcode_libdir_flag_spec=
+	  hardcode_libdir_flag_spec_ld='-rpath $libdir'
+	  archive_cmds='$LD -shared $libobjs $deplibs $compiler_flags -soname $soname -o $lib'
+	  if test "x$supports_anon_versioning" = xyes; then
+	    archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
+	      cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+	      echo "local: *; };" >> $output_objdir/$libname.ver~
+	      $LD -shared $libobjs $deplibs $compiler_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib'
+	  fi
+	  ;;
+	esac
+      else
+        ld_shlibs=no
+      fi
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	archive_cmds='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
+	wlarc=
+      else
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      fi
+      ;;
+
+    solaris*)
+      if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: The releases 2.8.* of the GNU linker cannot reliably
+*** create shared libraries on Solaris systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.9.1 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+      elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*)
+      case `$LD -v 2>&1` in
+        *\ [01].* | *\ 2.[0-9].* | *\ 2.1[0-5].*)
+	ld_shlibs=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 can not
+*** reliably create shared libraries on SCO systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.16.91.0.3 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+	;;
+	*)
+	  # For security reasons, it is highly recommended that you always
+	  # use absolute paths for naming shared libraries, and exclude the
+	  # DT_RUNPATH tag from executables and libraries.  But doing so
+	  # requires that you compile everything twice, which is a pain.
+	  if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+	    archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	    archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+	  else
+	    ld_shlibs=no
+	  fi
+	;;
+      esac
+      ;;
+
+    sunos4*)
+      archive_cmds='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      wlarc=
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    *)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	ld_shlibs=no
+      fi
+      ;;
+    esac
+
+    if test "$ld_shlibs" = no; then
+      runpath_var=
+      hardcode_libdir_flag_spec=
+      export_dynamic_flag_spec=
+      whole_archive_flag_spec=
+    fi
+  else
+    # PORTME fill in a description of your system's linker (not GNU ld)
+    case $host_os in
+    aix3*)
+      allow_undefined_flag=unsupported
+      always_export_symbols=yes
+      archive_expsym_cmds='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
+      # Note: this linker hardcodes the directories in LIBPATH if there
+      # are no directories specified by -L.
+      hardcode_minus_L=yes
+      if test "$GCC" = yes && test -z "$lt_prog_compiler_static"; then
+	# Neither direct hardcoding nor static linking is supported with a
+	# broken collect2.
+	hardcode_direct=unsupported
+      fi
+      ;;
+
+    aix[4-9]*)
+      if test "$host_cpu" = ia64; then
+	# On IA64, the linker does run time linking by default, so we don't
+	# have to do anything special.
+	aix_use_runtimelinking=no
+	exp_sym_flag='-Bexport'
+	no_entry_flag=""
+      else
+	# If we're using GNU nm, then we don't want the "-C" option.
+	# -C means demangle to AIX nm, but means don't demangle with GNU nm
+	if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+	  export_symbols_cmds='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && (substr(\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+	else
+	  export_symbols_cmds='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && (substr(\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+	fi
+	aix_use_runtimelinking=no
+
+	# Test if we are trying to use run time linking or normal
+	# AIX style linking. If -brtl is somewhere in LDFLAGS, we
+	# need to do runtime linking.
+	case $host_os in aix4.[23]|aix4.[23].*|aix[5-9]*)
+	  for ld_flag in $LDFLAGS; do
+	  if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then
+	    aix_use_runtimelinking=yes
+	    break
+	  fi
+	  done
+	  ;;
+	esac
+
+	exp_sym_flag='-bexport'
+	no_entry_flag='-bnoentry'
+      fi
+
+      # When large executables or shared objects are built, AIX ld can
+      # have problems creating the table of contents.  If linking a library
+      # or program results in "error TOC overflow" add -mminimal-toc to
+      # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+      # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+      archive_cmds=''
+      hardcode_direct=yes
+      hardcode_direct_absolute=yes
+      hardcode_libdir_separator=':'
+      link_all_deplibs=yes
+      file_list_spec='${wl}-f,'
+
+      if test "$GCC" = yes; then
+	case $host_os in aix4.[012]|aix4.[012].*)
+	# We only want to do this on AIX 4.2 and lower, the check
+	# below for broken collect2 doesn't work under 4.3+
+	  collect2name=`${CC} -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	   strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	  # We have reworked collect2
+	  :
+	  else
+	  # We have old collect2
+	  hardcode_direct=unsupported
+	  # It fails to find uninstalled libraries when the uninstalled
+	  # path is not listed in the libpath.  Setting hardcode_minus_L
+	  # to unsupported forces relinking
+	  hardcode_minus_L=yes
+	  hardcode_libdir_flag_spec='-L$libdir'
+	  hardcode_libdir_separator=
+	  fi
+	  ;;
+	esac
+	shared_flag='-shared'
+	if test "$aix_use_runtimelinking" = yes; then
+	  shared_flag="$shared_flag "'${wl}-G'
+	fi
+	link_all_deplibs=no
+      else
+	# not using gcc
+	if test "$host_cpu" = ia64; then
+	# VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	# chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+	else
+	  if test "$aix_use_runtimelinking" = yes; then
+	    shared_flag='${wl}-G'
+	  else
+	    shared_flag='${wl}-bM:SRE'
+	  fi
+	fi
+      fi
+
+      export_dynamic_flag_spec='${wl}-bexpall'
+      # It seems that -bexpall does not export symbols beginning with
+      # underscore (_), so it is better to generate a list of symbols to export.
+      always_export_symbols=yes
+      if test "$aix_use_runtimelinking" = yes; then
+	# Warning - without using the other runtime loading flags (-brtl),
+	# -berok will link without error, but may produce a broken library.
+	allow_undefined_flag='-berok'
+        # Determine the default libpath from the value encoded in an
+        # empty executable.
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+lt_aix_libpath_sed='
+    /Import File Strings/,/^$/ {
+	/^0/ {
+	    s/^0  *\(.*\)$/\1/
+	    p
+	}
+    }'
+aix_libpath=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+# Check for a 64-bit object if we didn't find anything.
+if test -z "$aix_libpath"; then
+  aix_libpath=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
+
+        hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
+        archive_expsym_cmds='$CC -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags `if test "x${allow_undefined_flag}" != "x"; then $ECHO "X${wl}${allow_undefined_flag}" | $Xsed; else :; fi` '"\${wl}$exp_sym_flag:\$export_symbols $shared_flag"
+      else
+	if test "$host_cpu" = ia64; then
+	  hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
+	  allow_undefined_flag="-z nodefs"
+	  archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$exp_sym_flag:\$export_symbols"
+	else
+	 # Determine the default libpath from the value encoded in an
+	 # empty executable.
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+lt_aix_libpath_sed='
+    /Import File Strings/,/^$/ {
+	/^0/ {
+	    s/^0  *\(.*\)$/\1/
+	    p
+	}
+    }'
+aix_libpath=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+# Check for a 64-bit object if we didn't find anything.
+if test -z "$aix_libpath"; then
+  aix_libpath=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
+
+	 hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:'"$aix_libpath"
+	  # Warning - without using the other run time loading flags,
+	  # -berok will link without error, but may produce a broken library.
+	  no_undefined_flag=' ${wl}-bernotok'
+	  allow_undefined_flag=' ${wl}-berok'
+	  # Exported symbols can be pulled into shared objects from archives
+	  whole_archive_flag_spec='$convenience'
+	  archive_cmds_need_lc=yes
+	  # This is similar to how AIX traditionally builds its shared libraries.
+	  archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname'
+	fi
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+            archive_expsym_cmds=''
+        ;;
+      m68k)
+            archive_cmds='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            hardcode_libdir_flag_spec='-L$libdir'
+            hardcode_minus_L=yes
+        ;;
+      esac
+      ;;
+
+    bsdi[45]*)
+      export_dynamic_flag_spec=-rdynamic
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # When not using gcc, we currently assume that we are using
+      # Microsoft Visual C++.
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      hardcode_libdir_flag_spec=' '
+      allow_undefined_flag=unsupported
+      # Tell ltmain to make .lib files, not .a files.
+      libext=lib
+      # Tell ltmain to make .dll files, not .so files.
+      shrext_cmds=".dll"
+      # FIXME: Setting linknames here is a bad hack.
+      archive_cmds='$CC -o $lib $libobjs $compiler_flags `$ECHO "X$deplibs" | $Xsed -e '\''s/ -lc$//'\''` -link -dll~linknames='
+      # The linker will automatically build a .lib file if we build a DLL.
+      old_archive_from_new_cmds='true'
+      # FIXME: Should let the user specify the lib program.
+      old_archive_cmds='lib -OUT:$oldlib$oldobjs$old_deplibs'
+      fix_srcfile_path='`cygpath -w "$srcfile"`'
+      enable_shared_with_static_runtimes=yes
+      ;;
+
+    darwin* | rhapsody*)
+
+
+  archive_cmds_need_lc=no
+  hardcode_direct=no
+  hardcode_automatic=yes
+  hardcode_shlibpath_var=unsupported
+  whole_archive_flag_spec=''
+  link_all_deplibs=yes
+  allow_undefined_flag="$_lt_dar_allow_undefined"
+  case $cc_basename in
+     ifort*) _lt_dar_can_shared=yes ;;
+     *) _lt_dar_can_shared=$GCC ;;
+  esac
+  if test "$_lt_dar_can_shared" = "yes"; then
+    output_verbose_link_cmd=echo
+    archive_cmds="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod${_lt_dsymutil}"
+    module_cmds="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}"
+    archive_expsym_cmds="sed 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring ${_lt_dar_single_mod}${_lt_dar_export_syms}${_lt_dsymutil}"
+    module_expsym_cmds="sed -e 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dar_export_syms}${_lt_dsymutil}"
+
+  else
+  ld_shlibs=no
+  fi
+
+      ;;
+
+    dgux*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_shlibpath_var=no
+      ;;
+
+    freebsd1*)
+      ld_shlibs=no
+      ;;
+
+    # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
+    # support.  Future versions do this automatically, but an explicit c++rt0.o
+    # does not break anything, and helps significantly (at the cost of a little
+    # extra space).
+    freebsd2.2*)
+      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    # Unfortunately, older versions of FreeBSD 2 do not have this feature.
+    freebsd2*)
+      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
+    freebsd* | dragonfly*)
+      archive_cmds='$CC -shared -o $lib $libobjs $deplibs $compiler_flags'
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    hpux9*)
+      if test "$GCC" = yes; then
+	archive_cmds='$RM $output_objdir/$soname~$CC -shared -fPIC ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+      else
+	archive_cmds='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+      fi
+      hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+      hardcode_libdir_separator=:
+      hardcode_direct=yes
+
+      # hardcode_minus_L: Not really in the search PATH,
+      # but as the default location of the library.
+      hardcode_minus_L=yes
+      export_dynamic_flag_spec='${wl}-E'
+      ;;
+
+    hpux10*)
+      if test "$GCC" = yes -a "$with_gnu_ld" = no; then
+	archive_cmds='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      if test "$with_gnu_ld" = no; then
+	hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+	hardcode_libdir_flag_spec_ld='+b $libdir'
+	hardcode_libdir_separator=:
+	hardcode_direct=yes
+	hardcode_direct_absolute=yes
+	export_dynamic_flag_spec='${wl}-E'
+	# hardcode_minus_L: Not really in the search PATH,
+	# but as the default location of the library.
+	hardcode_minus_L=yes
+      fi
+      ;;
+
+    hpux11*)
+      if test "$GCC" = yes -a "$with_gnu_ld" = no; then
+	case $host_cpu in
+	hppa*64*)
+	  archive_cmds='$CC -shared ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  archive_cmds='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  archive_cmds='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      else
+	case $host_cpu in
+	hppa*64*)
+	  archive_cmds='$CC -b ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  archive_cmds='$CC -b ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  archive_cmds='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      fi
+      if test "$with_gnu_ld" = no; then
+	hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
+	hardcode_libdir_separator=:
+
+	case $host_cpu in
+	hppa*64*|ia64*)
+	  hardcode_direct=no
+	  hardcode_shlibpath_var=no
+	  ;;
+	*)
+	  hardcode_direct=yes
+	  hardcode_direct_absolute=yes
+	  export_dynamic_flag_spec='${wl}-E'
+
+	  # hardcode_minus_L: Not really in the search PATH,
+	  # but as the default location of the library.
+	  hardcode_minus_L=yes
+	  ;;
+	esac
+      fi
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      if test "$GCC" = yes; then
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+	# Try to use the -exported_symbol ld option, if it does not
+	# work, assume that -exports_file does not work either and
+	# implicitly export all symbols.
+        save_LDFLAGS="$LDFLAGS"
+        LDFLAGS="$LDFLAGS -shared ${wl}-exported_symbol ${wl}foo ${wl}-update_registry ${wl}/dev/null"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int foo(void) {}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations ${wl}-exports_file ${wl}$export_symbols -o $lib'
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+        LDFLAGS="$save_LDFLAGS"
+      else
+	archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -exports_file $export_symbols -o $lib'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      inherit_rpath=yes
+      link_all_deplibs=yes
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
+      else
+	archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
+      fi
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_direct=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    newsos6)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_direct=yes
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      hardcode_shlibpath_var=no
+      ;;
+
+    *nto* | *qnx*)
+      ;;
+
+    openbsd*)
+      if test -f /usr/libexec/ld.so; then
+	hardcode_direct=yes
+	hardcode_shlibpath_var=no
+	hardcode_direct_absolute=yes
+	if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+	  archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags ${wl}-retain-symbols-file,$export_symbols'
+	  hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+	  export_dynamic_flag_spec='${wl}-E'
+	else
+	  case $host_os in
+	   openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
+	     archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+	     hardcode_libdir_flag_spec='-R$libdir'
+	     ;;
+	   *)
+	     archive_cmds='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	     hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
+	     ;;
+	  esac
+	fi
+      else
+	ld_shlibs=no
+      fi
+      ;;
+
+    os2*)
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_minus_L=yes
+      allow_undefined_flag=unsupported
+      archive_cmds='$ECHO "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~$ECHO DATA >> $output_objdir/$libname.def~$ECHO " SINGLE NONSHARED" >> $output_objdir/$libname.def~$ECHO EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def'
+      old_archive_from_new_cmds='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def'
+      ;;
+
+    osf3*)
+      if test "$GCC" = yes; then
+	allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
+	archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+      else
+	allow_undefined_flag=' -expect_unresolved \*'
+	archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      hardcode_libdir_separator=:
+      ;;
+
+    osf4* | osf5*)	# as osf3* with the addition of -msym flag
+      if test "$GCC" = yes; then
+	allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
+	archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+	hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
+      else
+	allow_undefined_flag=' -expect_unresolved \*'
+	archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	archive_expsym_cmds='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~
+	$CC -shared${allow_undefined_flag} ${wl}-input ${wl}$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib~$RM $lib.exp'
+
+	# Both c and cxx compiler support -rpath directly
+	hardcode_libdir_flag_spec='-rpath $libdir'
+      fi
+      archive_cmds_need_lc='no'
+      hardcode_libdir_separator=:
+      ;;
+
+    solaris*)
+      no_undefined_flag=' -z defs'
+      if test "$GCC" = yes; then
+	wlarc='${wl}'
+	archive_cmds='$CC -shared ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $CC -shared ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+      else
+	case `$CC -V 2>&1` in
+	*"Compilers 5.0"*)
+	  wlarc=''
+	  archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp'
+	  ;;
+	*)
+	  wlarc='${wl}'
+	  archive_cmds='$CC -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $compiler_flags'
+	  archive_expsym_cmds='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $CC -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+	  ;;
+	esac
+      fi
+      hardcode_libdir_flag_spec='-R$libdir'
+      hardcode_shlibpath_var=no
+      case $host_os in
+      solaris2.[0-5] | solaris2.[0-5].*) ;;
+      *)
+	# The compiler driver will combine and reorder linker options,
+	# but understands `-z linker_flag'.  GCC discards it without `$wl',
+	# but is careful enough not to reorder.
+	# Supported since Solaris 2.6 (maybe 2.5.1?)
+	if test "$GCC" = yes; then
+	  whole_archive_flag_spec='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract'
+	else
+	  whole_archive_flag_spec='-z allextract$convenience -z defaultextract'
+	fi
+	;;
+      esac
+      link_all_deplibs=yes
+      ;;
+
+    sunos4*)
+      if test "x$host_vendor" = xsequent; then
+	# Use $CC to link under sequent, because it throws in some extra .o
+	# files that make .init and .fini sections work.
+	archive_cmds='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_direct=yes
+      hardcode_minus_L=yes
+      hardcode_shlibpath_var=no
+      ;;
+
+    sysv4)
+      case $host_vendor in
+	sni)
+	  archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  hardcode_direct=yes # is this really true???
+	;;
+	siemens)
+	  ## LD is ld it makes a PLAMLIB
+	  ## CC just makes a GrossModule.
+	  archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags'
+	  reload_cmds='$CC -r -o $output$reload_objs'
+	  hardcode_direct=no
+        ;;
+	motorola)
+	  archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  hardcode_direct=no #Motorola manual says yes, but my tests say they lie
+	;;
+      esac
+      runpath_var='LD_RUN_PATH'
+      hardcode_shlibpath_var=no
+      ;;
+
+    sysv4.3*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_shlibpath_var=no
+      export_dynamic_flag_spec='-Bexport'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	hardcode_shlibpath_var=no
+	runpath_var=LD_RUN_PATH
+	hardcode_runpath_var=yes
+	ld_shlibs=yes
+      fi
+      ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[01].[10]* | unixware7* | sco3.2v5.0.[024]*)
+      no_undefined_flag='${wl}-z,text'
+      archive_cmds_need_lc=no
+      hardcode_shlibpath_var=no
+      runpath_var='LD_RUN_PATH'
+
+      if test "$GCC" = yes; then
+	archive_cmds='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6*)
+      # Note: We can NOT use -z defs as we might desire, because we do not
+      # link with -lc, and that would cause any symbols used from libc to
+      # always be unresolved, which means just about no library would
+      # ever link correctly.  If we're not using GNU ld we use -z text
+      # though, which does catch some bad symbols but isn't as heavy-handed
+      # as -z defs.
+      no_undefined_flag='${wl}-z,text'
+      allow_undefined_flag='${wl}-z,nodefs'
+      archive_cmds_need_lc=no
+      hardcode_shlibpath_var=no
+      hardcode_libdir_flag_spec='${wl}-R,$libdir'
+      hardcode_libdir_separator=':'
+      link_all_deplibs=yes
+      export_dynamic_flag_spec='${wl}-Bexport'
+      runpath_var='LD_RUN_PATH'
+
+      if test "$GCC" = yes; then
+	archive_cmds='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	archive_cmds='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	archive_expsym_cmds='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    uts4*)
+      archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      hardcode_libdir_flag_spec='-L$libdir'
+      hardcode_shlibpath_var=no
+      ;;
+
+    *)
+      ld_shlibs=no
+      ;;
+    esac
+
+    if test x$host_vendor = xsni; then
+      case $host in
+      sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+	export_dynamic_flag_spec='${wl}-Blargedynsym'
+	;;
+      esac
+    fi
+  fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
+$as_echo "$ld_shlibs" >&6; }
+test "$ld_shlibs" = no && can_build_shared=no
+
+with_gnu_ld=$with_gnu_ld
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#
+# Do we need to explicitly link libc?
+#
+case "x$archive_cmds_need_lc" in
+x|xyes)
+  # Assume -lc should be added
+  archive_cmds_need_lc=yes
+
+  if test "$enable_shared" = yes && test "$GCC" = yes; then
+    case $archive_cmds in
+    *'~'*)
+      # FIXME: we may have to deal with multi-command sequences.
+      ;;
+    '$CC '*)
+      # Test whether the compiler implicitly links with -lc since on some
+      # systems, -lgcc has to come before -lc. If gcc already passes -lc
+      # to ld, don't add -lc before -lgcc.
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
+$as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
+      $RM conftest*
+      echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+      if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } 2>conftest.err; then
+        soname=conftest
+        lib=conftest
+        libobjs=conftest.$ac_objext
+        deplibs=
+        wl=$lt_prog_compiler_wl
+	pic_flag=$lt_prog_compiler_pic
+        compiler_flags=-v
+        linker_flags=-v
+        verstring=
+        output_objdir=.
+        libname=conftest
+        lt_save_allow_undefined_flag=$allow_undefined_flag
+        allow_undefined_flag=
+        if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
+  (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+        then
+	  archive_cmds_need_lc=no
+        else
+	  archive_cmds_need_lc=yes
+        fi
+        allow_undefined_flag=$lt_save_allow_undefined_flag
+      else
+        cat conftest.err 1>&5
+      fi
+      $RM conftest*
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $archive_cmds_need_lc" >&5
+$as_echo "$archive_cmds_need_lc" >&6; }
+      ;;
+    esac
+  fi
+  ;;
+esac
+
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+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
+$as_echo_n "checking dynamic linker characteristics... " >&6; }
+
+if test "$GCC" = yes; then
+  case $host_os in
+    darwin*) lt_awk_arg="/^libraries:/,/LR/" ;;
+    *) lt_awk_arg="/^libraries:/" ;;
+  esac
+  lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e "s,=/,/,g"`
+  if $ECHO "$lt_search_path_spec" | $GREP ';' >/dev/null ; then
+    # if the path contains ";" then we assume it to be the separator
+    # otherwise default to the standard path separator (i.e. ":") - it is
+    # assumed that no part of a normal pathname contains ";" but that should
+    # okay in the real world where ";" in dirpaths is itself problematic.
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED -e 's/;/ /g'`
+  else
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED  -e "s/$PATH_SEPARATOR/ /g"`
+  fi
+  # Ok, now we have the path, separated by spaces, we can step through it
+  # and add multilib dir if necessary.
+  lt_tmp_lt_search_path_spec=
+  lt_multi_os_dir=`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null`
+  for lt_sys_path in $lt_search_path_spec; do
+    if test -d "$lt_sys_path/$lt_multi_os_dir"; then
+      lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path/$lt_multi_os_dir"
+    else
+      test -d "$lt_sys_path" && \
+	lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path"
+    fi
+  done
+  lt_search_path_spec=`$ECHO $lt_tmp_lt_search_path_spec | awk '
+BEGIN {RS=" "; FS="/|\n";} {
+  lt_foo="";
+  lt_count=0;
+  for (lt_i = NF; lt_i > 0; lt_i--) {
+    if ($lt_i != "" && $lt_i != ".") {
+      if ($lt_i == "..") {
+        lt_count++;
+      } else {
+        if (lt_count == 0) {
+          lt_foo="/" $lt_i lt_foo;
+        } else {
+          lt_count--;
+        }
+      }
+    }
+  }
+  if (lt_foo != "") { lt_freq[lt_foo]++; }
+  if (lt_freq[lt_foo] == 1) { print lt_foo; }
+}'`
+  sys_lib_search_path_spec=`$ECHO $lt_search_path_spec`
+else
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+fi
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+shrext_cmds=".so"
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+need_lib_prefix=unknown
+hardcode_into_libs=no
+
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+need_version=unknown
+
+case $host_os in
+aix3*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX 3 has no versioning support, so we append a major version to the name.
+  soname_spec='${libname}${release}${shared_ext}$major'
+  ;;
+
+aix[4-9]*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  hardcode_into_libs=yes
+  if test "$host_cpu" = ia64; then
+    # AIX 5 supports IA64
+    library_names_spec='${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext}$versuffix $libname${shared_ext}'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line `#! .'.  This would cause the generated library to
+    # depend on `.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+      aix4 | aix4.[01] | aix4.[01].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+	   echo ' yes '
+	   echo '#endif'; } | ${CC} -E - | $GREP yes > /dev/null; then
+	:
+      else
+	can_build_shared=no
+      fi
+      ;;
+    esac
+    # AIX (on Power*) has no versioning support, so currently we can not hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    if test "$aix_use_runtimelinking" = yes; then
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so
+      # instead of lib<name>.a to let people know that these are not
+      # typical AIX shared libraries.
+      library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    else
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='${libname}${release}.a $libname.a'
+      soname_spec='${libname}${release}${shared_ext}$major'
+    fi
+    shlibpath_var=LIBPATH
+  fi
+  ;;
+
+amigaos*)
+  case $host_cpu in
+  powerpc)
+    # Since July 2007 AmigaOS4 officially supports .so libraries.
+    # When compiling the executable, add -use-dynld -Lsobjs: to the compileline.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    ;;
+  m68k)
+    library_names_spec='$libname.ixlibrary $libname.a'
+    # Create ${libname}_ixlibrary.a entries in /sys/libs.
+    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$ECHO "X$lib" | $Xsed -e '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done'
+    ;;
+  esac
+  ;;
+
+beos*)
+  library_names_spec='${libname}${shared_ext}'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi[45]*)
+  version_type=linux
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32* | cegcc*)
+  version_type=windows
+  shrext_cmds=".dll"
+  need_version=no
+  need_lib_prefix=no
+
+  case $GCC,$host_os in
+  yes,cygwin* | yes,mingw* | yes,pw32* | yes,cegcc*)
+    library_names_spec='$libname.dll.a'
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \${file}`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\${base_file}'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname~
+      chmod a+x \$dldir/$dlname~
+      if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+        eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+      fi'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+
+    case $host_os in
+    cygwin*)
+      # Cygwin DLLs use 'cyg' prefix rather than 'lib'
+      soname_spec='`echo ${libname} | sed -e 's/^lib/cyg/'``echo ${release} | $SED -e 's/[.]/-/g'`${versuffix}${shared_ext}'
+      sys_lib_search_path_spec="/usr/lib /lib/w32api /lib /usr/local/lib"
+      ;;
+    mingw* | cegcc*)
+      # MinGW DLLs use traditional 'lib' prefix
+      soname_spec='${libname}`echo ${release} | $SED -e 's/[.]/-/g'`${versuffix}${shared_ext}'
+      sys_lib_search_path_spec=`$CC -print-search-dirs | $GREP "^libraries:" | $SED -e "s/^libraries://" -e "s,=/,/,g"`
+      if $ECHO "$sys_lib_search_path_spec" | $GREP ';[c-zC-Z]:/' >/dev/null; then
+        # It is most probably a Windows format PATH printed by
+        # mingw gcc, but we are running on Cygwin. Gcc prints its search
+        # path with ; separators, and with drive letters. We can handle the
+        # drive letters (cygwin fileutils understands them), so leave them,
+        # especially as we might pass files found there to a mingw objdump,
+        # which wouldn't understand a cygwinified path. Ahh.
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'`
+      else
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED  -e "s/$PATH_SEPARATOR/ /g"`
+      fi
+      ;;
+    pw32*)
+      # pw32 DLLs use 'pw' prefix rather than 'lib'
+      library_names_spec='`echo ${libname} | sed -e 's/^lib/pw/'``echo ${release} | $SED -e 's/[.]/-/g'`${versuffix}${shared_ext}'
+      ;;
+    esac
+    ;;
+
+  *)
+    library_names_spec='${libname}`echo ${release} | $SED -e 's/[.]/-/g'`${versuffix}${shared_ext} $libname.lib'
+    ;;
+  esac
+  dynamic_linker='Win32 ld.exe'
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${major}$shared_ext ${libname}$shared_ext'
+  soname_spec='${libname}${release}${major}$shared_ext'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
+
+  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"
+  sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
+  ;;
+
+dgux*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname$shared_ext'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+freebsd1*)
+  dynamic_linker=no
+  ;;
+
+freebsd* | dragonfly*)
+  # DragonFly does not have aout.  When/if they implement a new
+  # versioning mechanism, adjust this.
+  if test -x /usr/bin/objformat; then
+    objformat=`/usr/bin/objformat`
+  else
+    case $host_os in
+    freebsd[123]*) objformat=aout ;;
+    *) objformat=elf ;;
+    esac
+  fi
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='${libname}${release}${shared_ext}$versuffix $libname${shared_ext}$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  freebsd3.[01]* | freebsdelf3.[01]*)
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  freebsd3.[2-9]* | freebsdelf3.[2-9]* | \
+  freebsd4.[0-5] | freebsdelf4.[0-5] | freebsd4.1.1 | freebsdelf4.1.1)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  *) # from 4.6 on, and DragonFly
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+gnu*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}${major} ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  case $host_cpu in
+  ia64*)
+    shrext_cmds='.so'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.so"
+    shlibpath_var=LD_LIBRARY_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    if test "X$HPUX_IA64_MODE" = X32; then
+      sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib"
+    else
+      sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64"
+    fi
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  hppa*64*)
+    shrext_cmds='.sl'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64"
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  *)
+    shrext_cmds='.sl'
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=SHLIB_PATH
+    shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    ;;
+  esac
+  # HP-UX runs *really* slowly unless shared libraries are mode 555.
+  postinstall_cmds='chmod 555 $lib'
+  ;;
+
+interix[3-9]*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $host_os in
+    nonstopux*) version_type=nonstopux ;;
+    *)
+	if test "$lt_cv_prog_gnu_ld" = yes; then
+		version_type=linux
+	else
+		version_type=irix
+	fi ;;
+  esac
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='${libname}${release}${shared_ext}$major'
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext} $libname${shared_ext}'
+  case $host_os in
+  irix5* | nonstopux*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ")
+      libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ")
+      libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ")
+      libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}"
+  sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}"
+  hardcode_into_libs=yes
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux*oldld* | linux*aout* | linux*coff*)
+  dynamic_linker=no
+  ;;
+
+# This must be Linux ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  # Some binutils ld are patched to set DT_RUNPATH
+  save_LDFLAGS=$LDFLAGS
+  save_libdir=$libdir
+  eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \
+       LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\""
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then :
+  shlibpath_overrides_runpath=yes
+fi
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  LDFLAGS=$save_LDFLAGS
+  libdir=$save_libdir
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # Append ld.so.conf contents to the search path
+  if test -f /etc/ld.so.conf; then
+    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \$2)); skip = 1; } { if (!skip) print \$0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;/^$/d' | tr '\n' ' '`
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  fi
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsdelf*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='NetBSD ld.elf_so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+*nto* | *qnx*)
+  version_type=qnx
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='ldqnx.so'
+  ;;
+
+openbsd*)
+  version_type=sunos
+  sys_lib_dlsearch_path_spec="/usr/lib"
+  need_lib_prefix=no
+  # Some older versions of OpenBSD (3.3 at least) *do* need versioned libs.
+  case $host_os in
+    openbsd3.3 | openbsd3.3.*)	need_version=yes ;;
+    *)				need_version=no  ;;
+  esac
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+    case $host_os in
+      openbsd2.[89] | openbsd2.[89].*)
+	shlibpath_overrides_runpath=no
+	;;
+      *)
+	shlibpath_overrides_runpath=yes
+	;;
+      esac
+  else
+    shlibpath_overrides_runpath=yes
+  fi
+  ;;
+
+os2*)
+  libname_spec='$name'
+  shrext_cmds=".dll"
+  need_lib_prefix=no
+  library_names_spec='$libname${shared_ext} $libname.a'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=LIBPATH
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='${libname}${release}${shared_ext}$major'
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec"
+  ;;
+
+rdos*)
+  dynamic_linker=no
+  ;;
+
+solaris*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test "$with_gnu_ld" = yes; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.3*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      need_lib_prefix=no
+      runpath_var=LD_RUN_PATH
+      ;;
+    siemens)
+      need_lib_prefix=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec ;then
+    version_type=linux
+    library_names_spec='$libname${shared_ext}.$versuffix $libname${shared_ext}.$major $libname${shared_ext}'
+    soname_spec='$libname${shared_ext}.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  version_type=freebsd-elf
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  if test "$with_gnu_ld" = yes; then
+    sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib'
+  else
+    sys_lib_search_path_spec='/usr/ccs/lib /usr/lib'
+    case $host_os in
+      sco3.2v5*)
+        sys_lib_search_path_spec="$sys_lib_search_path_spec /lib"
+	;;
+    esac
+  fi
+  sys_lib_dlsearch_path_spec='/usr/lib'
+  ;;
+
+tpf*)
+  # TPF is a cross-target only.  Preferred cross-host = GNU/Linux.
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+uts4*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
+$as_echo "$dynamic_linker" >&6; }
+test "$dynamic_linker" = no && can_build_shared=no
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test "$GCC" = yes; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test "${lt_cv_sys_lib_search_path_spec+set}" = set; then
+  sys_lib_search_path_spec="$lt_cv_sys_lib_search_path_spec"
+fi
+if test "${lt_cv_sys_lib_dlsearch_path_spec+set}" = set; then
+  sys_lib_dlsearch_path_spec="$lt_cv_sys_lib_dlsearch_path_spec"
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
+$as_echo_n "checking how to hardcode library paths into programs... " >&6; }
+hardcode_action=
+if test -n "$hardcode_libdir_flag_spec" ||
+   test -n "$runpath_var" ||
+   test "X$hardcode_automatic" = "Xyes" ; then
+
+  # We can hardcode non-existent directories.
+  if test "$hardcode_direct" != no &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test "$_LT_TAGVAR(hardcode_shlibpath_var, )" != no &&
+     test "$hardcode_minus_L" != no; then
+    # Linking always hardcodes the temporary library directory.
+    hardcode_action=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    hardcode_action=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  hardcode_action=unsupported
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
+$as_echo "$hardcode_action" >&6; }
+
+if test "$hardcode_action" = relink ||
+   test "$inherit_rpath" = yes; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test "$shlibpath_overrides_runpath" = yes ||
+     test "$enable_shared" = no; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+
+
+
+
+
+
+  if test "x$enable_dlopen" != xyes; then
+  enable_dlopen=unknown
+  enable_dlopen_self=unknown
+  enable_dlopen_self_static=unknown
+else
+  lt_cv_dlopen=no
+  lt_cv_dlopen_libs=
+
+  case $host_os in
+  beos*)
+    lt_cv_dlopen="load_add_on"
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ;;
+
+  mingw* | pw32* | cegcc*)
+    lt_cv_dlopen="LoadLibrary"
+    lt_cv_dlopen_libs=
+    ;;
+
+  cygwin*)
+    lt_cv_dlopen="dlopen"
+    lt_cv_dlopen_libs=
+    ;;
+
+  darwin*)
+  # if libdl is installed we need to link against it
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+$as_echo_n "checking for dlopen in -ldl... " >&6; }
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dl_dlopen=yes
+else
+  ac_cv_lib_dl_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
+  lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"
+else
+
+    lt_cv_dlopen="dyld"
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+
+fi
+
+    ;;
+
+  *)
+    ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load"
+if test "x$ac_cv_func_shl_load" = x""yes; then :
+  lt_cv_dlopen="shl_load"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
+$as_echo_n "checking for shl_load in -ldld... " >&6; }
+if test "${ac_cv_lib_dld_shl_load+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char shl_load ();
+int
+main ()
+{
+return shl_load ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dld_shl_load=yes
+else
+  ac_cv_lib_dld_shl_load=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
+$as_echo "$ac_cv_lib_dld_shl_load" >&6; }
+if test "x$ac_cv_lib_dld_shl_load" = x""yes; then :
+  lt_cv_dlopen="shl_load" lt_cv_dlopen_libs="-ldld"
+else
+  ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
+if test "x$ac_cv_func_dlopen" = x""yes; then :
+  lt_cv_dlopen="dlopen"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+$as_echo_n "checking for dlopen in -ldl... " >&6; }
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dl_dlopen=yes
+else
+  ac_cv_lib_dl_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
+  lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
+$as_echo_n "checking for dlopen in -lsvld... " >&6; }
+if test "${ac_cv_lib_svld_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsvld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_svld_dlopen=yes
+else
+  ac_cv_lib_svld_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
+$as_echo "$ac_cv_lib_svld_dlopen" >&6; }
+if test "x$ac_cv_lib_svld_dlopen" = x""yes; then :
+  lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld"
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
+$as_echo_n "checking for dld_link in -ldld... " >&6; }
+if test "${ac_cv_lib_dld_dld_link+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldld  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dld_link ();
+int
+main ()
+{
+return dld_link ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dld_dld_link=yes
+else
+  ac_cv_lib_dld_dld_link=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
+$as_echo "$ac_cv_lib_dld_dld_link" >&6; }
+if test "x$ac_cv_lib_dld_dld_link" = x""yes; then :
+  lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-ldld"
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+
+fi
+
+    ;;
+  esac
+
+  if test "x$lt_cv_dlopen" != xno; then
+    enable_dlopen=yes
+  else
+    enable_dlopen=no
+  fi
+
+  case $lt_cv_dlopen in
+  dlopen)
+    save_CPPFLAGS="$CPPFLAGS"
+    test "x$ac_cv_header_dlfcn_h" = xyes && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"
+
+    save_LDFLAGS="$LDFLAGS"
+    wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"
+
+    save_LIBS="$LIBS"
+    LIBS="$lt_cv_dlopen_libs $LIBS"
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
+$as_echo_n "checking whether a program can dlopen itself... " >&6; }
+if test "${lt_cv_dlopen_self+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  	  if test "$cross_compiling" = yes; then :
+  lt_cv_dlopen_self=cross
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+#line 10824 "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+void fnord() { int i=42;}
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}
+_LT_EOF
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext} 2>/dev/null; then
+    (./conftest; exit; ) >&5 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self=yes ;;
+      x$lt_dlunknown|x*) lt_cv_dlopen_self=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
+$as_echo "$lt_cv_dlopen_self" >&6; }
+
+    if test "x$lt_cv_dlopen_self" = xyes; then
+      wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
+$as_echo_n "checking whether a statically linked program can dlopen itself... " >&6; }
+if test "${lt_cv_dlopen_self_static+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  	  if test "$cross_compiling" = yes; then :
+  lt_cv_dlopen_self_static=cross
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+#line 10920 "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+void fnord() { int i=42;}
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}
+_LT_EOF
+  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest${ac_exeext} 2>/dev/null; then
+    (./conftest; exit; ) >&5 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_dlneed_uscore) lt_cv_dlopen_self_static=yes ;;
+      x$lt_dlunknown|x*) lt_cv_dlopen_self_static=no ;;
+    esac
+  else :
+    # compilation failed
+    lt_cv_dlopen_self_static=no
+  fi
+fi
+rm -fr conftest*
+
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
+$as_echo "$lt_cv_dlopen_self_static" >&6; }
+    fi
+
+    CPPFLAGS="$save_CPPFLAGS"
+    LDFLAGS="$save_LDFLAGS"
+    LIBS="$save_LIBS"
+    ;;
+  esac
+
+  case $lt_cv_dlopen_self in
+  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
+  *) enable_dlopen_self=unknown ;;
+  esac
+
+  case $lt_cv_dlopen_self_static in
+  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
+  *) enable_dlopen_self_static=unknown ;;
+  esac
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+striplib=
+old_striplib=
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
+$as_echo_n "checking whether stripping libraries is possible... " >&6; }
+if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
+  test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
+  test -z "$striplib" && striplib="$STRIP --strip-unneeded"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+# FIXME - insert some real tests, host_os isn't really good enough
+  case $host_os in
+  darwin*)
+    if test -n "$STRIP" ; then
+      striplib="$STRIP -x"
+      old_striplib="$STRIP -S"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    fi
+    ;;
+  *)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    ;;
+  esac
+fi
+
+
+
+
+
+
+
+
+
+
+
+
+  # Report which library types will actually be built
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
+$as_echo_n "checking if libtool supports shared libraries... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
+$as_echo "$can_build_shared" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
+$as_echo_n "checking whether to build shared libraries... " >&6; }
+  test "$can_build_shared" = "no" && enable_shared=no
+
+  # On AIX, shared libraries and static libraries use the same namespace, and
+  # are all built from PIC.
+  case $host_os in
+  aix3*)
+    test "$enable_shared" = yes && enable_static=no
+    if test -n "$RANLIB"; then
+      archive_cmds="$archive_cmds~\$RANLIB \$lib"
+      postinstall_cmds='$RANLIB $lib'
+    fi
+    ;;
+
+  aix[4-9]*)
+    if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
+      test "$enable_shared" = yes && enable_static=no
+    fi
+    ;;
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
+$as_echo "$enable_shared" >&6; }
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
+$as_echo_n "checking whether to build static libraries... " >&6; }
+  # Make sure either enable_shared or enable_static is yes.
+  test "$enable_shared" = yes || enable_static=yes
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
+$as_echo "$enable_static" >&6; }
+
+
+
+
+fi
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+CC="$lt_save_CC"
+
+
+
+
+
+
+
+
+
+
+
+
+
+        ac_config_commands="$ac_config_commands libtool"
+
+
+
+
+# Only expand once:
+
+
+
+# Checks for programs.
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+$as_echo "$CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+$as_echo "$ac_ct_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+
+
+test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5 ; }
+
+# Provide some information about the compiler.
+$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
+$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
+if test "${ac_cv_c_compiler_gnu+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_compiler_gnu=yes
+else
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+$as_echo "$ac_cv_c_compiler_gnu" >&6; }
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+$as_echo_n "checking whether $CC accepts -g... " >&6; }
+if test "${ac_cv_prog_cc_g+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+else
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+$as_echo "$ac_cv_prog_cc_g" >&6; }
+if test "$ac_test_CFLAGS" = set; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
+$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
+if test "${ac_cv_prog_cc_c89+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not '\xHH' hex character constants.
+   These don't provoke an error unfortunately, instead are silently treated
+   as 'x'.  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
+   array size at least.  It's necessary to write '\x00'==0 to get something
+   that's true only with -std.  */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) 'x'
+int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
+	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_c89=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c89" in
+  x)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+  xno)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+  *)
+    CC="$CC $ac_cv_prog_cc_c89"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c89" != xno; then :
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+depcc="$CC"   am_compiler_list=
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
+$as_echo_n "checking dependency style of $depcc... " >&6; }
+if test "${am_cv_CC_dependencies_compiler_type+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
+  # We make a subdir and do the tests there.  Otherwise we can end up
+  # making bogus files that we don't know about and never remove.  For
+  # instance it was reported that on HP-UX the gcc test will end up
+  # making a dummy file named `D' -- because `-MD' means `put the output
+  # in D'.
+  mkdir conftest.dir
+  # Copy depcomp to subdir because otherwise we won't find it if we're
+  # using a relative directory.
+  cp "$am_depcomp" conftest.dir
+  cd conftest.dir
+  # We will build objects and dependencies in a subdirectory because
+  # it helps to detect inapplicable dependency modes.  For instance
+  # both Tru64's cc and ICC support -MD to output dependencies as a
+  # side effect of compilation, but ICC will put the dependencies in
+  # the current directory while Tru64 will put them in the object
+  # directory.
+  mkdir sub
+
+  am_cv_CC_dependencies_compiler_type=none
+  if test "$am_compiler_list" = ""; then
+     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
+  fi
+  am__universal=false
+  case " $depcc " in #(
+     *\ -arch\ *\ -arch\ *) am__universal=true ;;
+     esac
+
+  for depmode in $am_compiler_list; do
+    # Setup a source with many dependencies, because some compilers
+    # like to wrap large dependency lists on column 80 (with \), and
+    # we should not choose a depcomp mode which is confused by this.
+    #
+    # We need to recreate these files for each test, as the compiler may
+    # overwrite some of them when testing with obscure command lines.
+    # This happens at least with the AIX C compiler.
+    : > sub/conftest.c
+    for i in 1 2 3 4 5 6; do
+      echo '#include "conftst'$i'.h"' >> sub/conftest.c
+      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
+      # Solaris 8's {/usr,}/bin/sh.
+      touch sub/conftst$i.h
+    done
+    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
+
+    # We check with `-c' and `-o' for the sake of the "dashmstdout"
+    # mode.  It turns out that the SunPro C++ compiler does not properly
+    # handle `-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs
+    am__obj=sub/conftest.${OBJEXT-o}
+    am__minus_obj="-o $am__obj"
+    case $depmode in
+    gcc)
+      # This depmode causes a compiler race in universal mode.
+      test "$am__universal" = false || continue
+      ;;
+    nosideeffect)
+      # after this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested
+      if test "x$enable_dependency_tracking" = xyes; then
+	continue
+      else
+	break
+      fi
+      ;;
+    msvisualcpp | msvcmsys)
+      # This compiler won't grok `-c -o', but also, the minuso test has
+      # not run yet.  These depmodes are late enough in the game, and
+      # so weak that their functioning should not be impacted.
+      am__obj=conftest.${OBJEXT-o}
+      am__minus_obj=
+      ;;
+    none) break ;;
+    esac
+    if depmode=$depmode \
+       source=sub/conftest.c object=$am__obj \
+       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
+       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
+         >/dev/null 2>conftest.err &&
+       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
+       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
+       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
+      # icc doesn't choke on unknown options, it will just issue warnings
+      # or remarks (even with -Werror).  So we grep stderr for any message
+      # that says an option was ignored or not supported.
+      # When given -MP, icc 7.0 and 7.1 complain thusly:
+      #   icc: Command line warning: ignoring option '-M'; no argument required
+      # The diagnosis changed in icc 8.0:
+      #   icc: Command line remark: option '-MP' not supported
+      if (grep 'ignoring option' conftest.err ||
+          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
+        am_cv_CC_dependencies_compiler_type=$depmode
+        break
+      fi
+    fi
+  done
+
+  cd ..
+  rm -rf conftest.dir
+else
+  am_cv_CC_dependencies_compiler_type=none
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
+$as_echo "$am_cv_CC_dependencies_compiler_type" >&6; }
+CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
+
+ if
+  test "x$enable_dependency_tracking" != xno \
+  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
+  am__fastdepCC_TRUE=
+  am__fastdepCC_FALSE='#'
+else
+  am__fastdepCC_TRUE='#'
+  am__fastdepCC_FALSE=
+fi
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for reentrant lex" >&5
+$as_echo_n "checking for reentrant lex... " >&6; }
+if test "${ac_cv_path_LEX+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$LEX"; then
+  ac_path_LEX_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in $LEX flex gflex; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_LEX="$as_dir/$ac_prog$ac_exec_ext"
+      { test -f "$ac_path_LEX" && $as_test_x "$ac_path_LEX"; } || continue
+cat >conftest.l <<_ACEOF
+%{
+%}
+
+%option reentrant
+%option bison-bridge
+%option noinput
+%option nounput
+%option noreject
+
+BLANK  \t\n
+
+%%
+<<EOF>> return 0;
+%%
+_ACEOF
+{ { ac_try="$ac_path_LEX conftest.l"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_path_LEX conftest.l") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+test $ac_status -eq 0 && ac_cv_path_LEX=$ac_path_LEX ac_path_LEX_found=true
+rm -f conftest.l lexyy.c lex.yy.c
+
+      $ac_path_LEX_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_LEX"; then
+    as_fn_error $? "could not find lex that supports reentrant parsers" "$LINENO" 5
+  fi
+else
+  ac_cv_path_LEX=$LEX
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_LEX" >&5
+$as_echo "$ac_cv_path_LEX" >&6; }
+LEX=$ac_cv_path_LEX
+
+for ac_prog in flex lex
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_LEX+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LEX"; then
+  ac_cv_prog_LEX="$LEX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_LEX="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+LEX=$ac_cv_prog_LEX
+if test -n "$LEX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LEX" >&5
+$as_echo "$LEX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LEX" && break
+done
+test -n "$LEX" || LEX=":"
+
+if test "x$LEX" != "x:"; then
+  cat >conftest.l <<_ACEOF
+%%
+a { ECHO; }
+b { REJECT; }
+c { yymore (); }
+d { yyless (1); }
+e { yyless (input () != 0); }
+f { unput (yytext[0]); }
+. { BEGIN INITIAL; }
+%%
+#ifdef YYTEXT_POINTER
+extern char *yytext;
+#endif
+int
+main (void)
+{
+  return ! yylex () + ! yywrap ();
+}
+_ACEOF
+{ { ac_try="$LEX conftest.l"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$LEX conftest.l") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking lex output file root" >&5
+$as_echo_n "checking lex output file root... " >&6; }
+if test "${ac_cv_prog_lex_root+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+if test -f lex.yy.c; then
+  ac_cv_prog_lex_root=lex.yy
+elif test -f lexyy.c; then
+  ac_cv_prog_lex_root=lexyy
+else
+  as_fn_error $? "cannot find output from $LEX; giving up" "$LINENO" 5
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_root" >&5
+$as_echo "$ac_cv_prog_lex_root" >&6; }
+LEX_OUTPUT_ROOT=$ac_cv_prog_lex_root
+
+if test -z "${LEXLIB+set}"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking lex library" >&5
+$as_echo_n "checking lex library... " >&6; }
+if test "${ac_cv_lib_lex+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    ac_save_LIBS=$LIBS
+    ac_cv_lib_lex='none needed'
+    for ac_lib in '' -lfl -ll; do
+      LIBS="$ac_lib $ac_save_LIBS"
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+`cat $LEX_OUTPUT_ROOT.c`
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_lex=$ac_lib
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+      test "$ac_cv_lib_lex" != 'none needed' && break
+    done
+    LIBS=$ac_save_LIBS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_lex" >&5
+$as_echo "$ac_cv_lib_lex" >&6; }
+  test "$ac_cv_lib_lex" != 'none needed' && LEXLIB=$ac_cv_lib_lex
+fi
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether yytext is a pointer" >&5
+$as_echo_n "checking whether yytext is a pointer... " >&6; }
+if test "${ac_cv_prog_lex_yytext_pointer+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  # POSIX says lex can declare yytext either as a pointer or an array; the
+# default is implementation-dependent.  Figure out which it is, since
+# not all implementations provide the %pointer and %array declarations.
+ac_cv_prog_lex_yytext_pointer=no
+ac_save_LIBS=$LIBS
+LIBS="$LEXLIB $ac_save_LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define YYTEXT_POINTER 1
+`cat $LEX_OUTPUT_ROOT.c`
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_prog_lex_yytext_pointer=yes
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_save_LIBS
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_yytext_pointer" >&5
+$as_echo "$ac_cv_prog_lex_yytext_pointer" >&6; }
+if test $ac_cv_prog_lex_yytext_pointer = yes; then
+
+$as_echo "#define YYTEXT_POINTER 1" >>confdefs.h
+
+fi
+rm -f conftest.l $LEX_OUTPUT_ROOT.c
+
+fi
+if test "$LEX" = :; then
+  LEX=${am_missing_run}flex
+fi
+
+for ac_prog in 'bison -y' byacc
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_YACC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$YACC"; then
+  ac_cv_prog_YACC="$YACC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_YACC="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+YACC=$ac_cv_prog_YACC
+if test -n "$YACC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $YACC" >&5
+$as_echo "$YACC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$YACC" && break
+done
+test -n "$YACC" || YACC="yacc"
+
+YACC_BISON=`bison --version | awk '{print $1;exit}'`
+if test "$YACC_BISON" != "bison"; then
+    as_fn_error $? "GNU bison needed for reentrant parsers, set the \$YACC variable before running configure" "$LINENO" 5
+fi
+
+
+# Set compiler compatibility flags
+ac_c_preproc_warn_flag=yes
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C99" >&5
+$as_echo_n "checking for $CC option to accept ISO C99... " >&6; }
+if test "${ac_cv_prog_cc_c99+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_prog_cc_c99=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <stdio.h>
+
+// Check varargs macros.  These examples are taken from C99 6.10.3.5.
+#define debug(...) fprintf (stderr, __VA_ARGS__)
+#define showlist(...) puts (#__VA_ARGS__)
+#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
+static void
+test_varargs_macros (void)
+{
+  int x = 1234;
+  int y = 5678;
+  debug ("Flag");
+  debug ("X = %d\n", x);
+  showlist (The first, second, and third items.);
+  report (x>y, "x is %d but y is %d", x, y);
+}
+
+// Check long long types.
+#define BIG64 18446744073709551615ull
+#define BIG32 4294967295ul
+#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
+#if !BIG_OK
+  your preprocessor is broken;
+#endif
+#if BIG_OK
+#else
+  your preprocessor is broken;
+#endif
+static long long int bignum = -9223372036854775807LL;
+static unsigned long long int ubignum = BIG64;
+
+struct incomplete_array
+{
+  int datasize;
+  double data[];
+};
+
+struct named_init {
+  int number;
+  const wchar_t *name;
+  double average;
+};
+
+typedef const char *ccp;
+
+static inline int
+test_restrict (ccp restrict text)
+{
+  // See if C++-style comments work.
+  // Iterate through items via the restricted pointer.
+  // Also check for declarations in for loops.
+  for (unsigned int i = 0; *(text+i) != '\0'; ++i)
+    continue;
+  return 0;
+}
+
+// Check varargs and va_copy.
+static void
+test_varargs (const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  va_list args_copy;
+  va_copy (args_copy, args);
+
+  const char *str;
+  int number;
+  float fnumber;
+
+  while (*format)
+    {
+      switch (*format++)
+	{
+	case 's': // string
+	  str = va_arg (args_copy, const char *);
+	  break;
+	case 'd': // int
+	  number = va_arg (args_copy, int);
+	  break;
+	case 'f': // float
+	  fnumber = va_arg (args_copy, double);
+	  break;
+	default:
+	  break;
+	}
+    }
+  va_end (args_copy);
+  va_end (args);
+}
+
+int
+main ()
+{
+
+  // Check bool.
+  _Bool success = false;
+
+  // Check restrict.
+  if (test_restrict ("String literal") == 0)
+    success = true;
+  char *restrict newvar = "Another string";
+
+  // Check varargs.
+  test_varargs ("s, d' f .", "string", 65, 34.234);
+  test_varargs_macros ();
+
+  // Check flexible array members.
+  struct incomplete_array *ia =
+    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
+  ia->datasize = 10;
+  for (int i = 0; i < ia->datasize; ++i)
+    ia->data[i] = i * 1.234;
+
+  // Check named initializers.
+  struct named_init ni = {
+    .number = 34,
+    .name = L"Test wide string",
+    .average = 543.34343,
+  };
+
+  ni.number = 58;
+
+  int dynamic_array[ni.number];
+  dynamic_array[ni.number - 1] = 543;
+
+  // work around unused variable warnings
+  return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x'
+	  || dynamic_array[ni.number - 1] != 543);
+
+  ;
+  return 0;
+}
+_ACEOF
+for ac_arg in '' -std=gnu99 -std=c99 -c99 -AC99 -xc99=all -qlanglvl=extc99
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_prog_cc_c99=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext
+  test "x$ac_cv_prog_cc_c99" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+
+fi
+# AC_CACHE_VAL
+case "x$ac_cv_prog_cc_c99" in
+  x)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+$as_echo "none needed" >&6; } ;;
+  xno)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+$as_echo "unsupported" >&6; } ;;
+  *)
+    CC="$CC $ac_cv_prog_cc_c99"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+$as_echo "$ac_cv_prog_cc_c99" >&6; } ;;
+esac
+if test "x$ac_cv_prog_cc_c99" != xno; then :
+
+fi
+
+
+
+# Check whether --enable-ldns was given.
+if test "${enable_ldns+set}" = set; then :
+  enableval=$enable_ldns; case "${enableval}" in
+       yes) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing ldns_rr_list_pop_rrset" >&5
+$as_echo_n "checking for library containing ldns_rr_list_pop_rrset... " >&6; }
+if test "${ac_cv_search_ldns_rr_list_pop_rrset+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ldns_rr_list_pop_rrset ();
+int
+main ()
+{
+return ldns_rr_list_pop_rrset ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' ldns; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_ldns_rr_list_pop_rrset=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_ldns_rr_list_pop_rrset+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_ldns_rr_list_pop_rrset+set}" = set; then :
+
+else
+  ac_cv_search_ldns_rr_list_pop_rrset=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_ldns_rr_list_pop_rrset" >&5
+$as_echo "$ac_cv_search_ldns_rr_list_pop_rrset" >&6; }
+ac_res=$ac_cv_search_ldns_rr_list_pop_rrset
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+$as_echo "#define HAVE_LDNS 1" >>confdefs.h
+
+else
+  as_fn_error $? "ldns not found" "$LINENO" 5
+fi
+ ;;
+       no)  ldns=false ;;
+       *) as_fn_error $? "bad value ${enableval} for --enable-ldns" "$LINENO" 5  ;;
+     esac
+else
+  ldns=false
+fi
+
+
+# Debug level
+# Check whether --enable-debug was given.
+if test "${enable_debug+set}" = set; then :
+  enableval=$enable_debug; # Not all shells support fall-through with ;& so I have to duplicate
+    case "x${enableval}" in
+      xdetails)
+
+$as_echo "#define DEBUG_ENABLE_DETAILS 1" >>confdefs.h
+
+
+$as_echo "#define DEBUG_ENABLE_VERBOSE 1" >>confdefs.h
+
+
+$as_echo "#define DEBUG_ENABLE_BRIEF 1" >>confdefs.h
+
+	;;
+      xverbose)
+
+$as_echo "#define DEBUG_ENABLE_VERBOSE 1" >>confdefs.h
+
+
+$as_echo "#define DEBUG_ENABLE_BRIEF 1" >>confdefs.h
+
+	;;
+      xbrief)
+
+$as_echo "#define DEBUG_ENABLE_BRIEF 1" >>confdefs.h
+
+        ;;
+    esac
+fi
+
+
+# recvmmsg() (valgrind doesn't support it, so disable for debugging)
+# Check whether --enable-recvmmsg was given.
+if test "${enable_recvmmsg+set}" = set; then :
+  enableval=$enable_recvmmsg; case "${enableval}" in
+      yes)
+
+$as_echo "#define ENABLE_RECVMMSG 1" >>confdefs.h
+
+         ;;
+      no)
+         recvmmsg=false
+         ;;
+      *)
+         as_fn_error $? "bad value ${enableval} for --enable-recvmmsg" "$LINENO" 5
+         ;;
+    esac
+else
+
+
+$as_echo "#define ENABLE_RECVMMSG 1" >>confdefs.h
+
+    recvmmsg=true
+
+fi
+
+
+# Checks for libraries.
+# FIXME: Replace `main' with a function in `-lm':
+# TODO: check if paths exist before appending
+CFLAGS="$CFLAGS -I/usr/local/include"
+LDFLAGS="$LDFLAGS -L/usr/local/lib"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pow" >&5
+$as_echo_n "checking for library containing pow... " >&6; }
+if test "${ac_cv_search_pow+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pow ();
+int
+main ()
+{
+return pow ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' m; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_pow=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_pow+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_pow+set}" = set; then :
+
+else
+  ac_cv_search_pow=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_pow" >&5
+$as_echo "$ac_cv_search_pow" >&6; }
+ac_res=$ac_cv_search_pow
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pthread_create" >&5
+$as_echo_n "checking for library containing pthread_create... " >&6; }
+if test "${ac_cv_search_pthread_create+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pthread_create ();
+int
+main ()
+{
+return pthread_create ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' pthread; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_pthread_create=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_pthread_create+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_pthread_create+set}" = set; then :
+
+else
+  ac_cv_search_pthread_create=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_pthread_create" >&5
+$as_echo "$ac_cv_search_pthread_create" >&6; }
+ac_res=$ac_cv_search_pthread_create
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+else
+  as_fn_error $? "pthreads not found" "$LINENO" 5
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing rcu_set_pointer_sym" >&5
+$as_echo_n "checking for library containing rcu_set_pointer_sym... " >&6; }
+if test "${ac_cv_search_rcu_set_pointer_sym+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char rcu_set_pointer_sym ();
+int
+main ()
+{
+return rcu_set_pointer_sym ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' urcu; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_rcu_set_pointer_sym=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_rcu_set_pointer_sym+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_rcu_set_pointer_sym+set}" = set; then :
+
+else
+  ac_cv_search_rcu_set_pointer_sym=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_rcu_set_pointer_sym" >&5
+$as_echo "$ac_cv_search_rcu_set_pointer_sym" >&6; }
+ac_res=$ac_cv_search_rcu_set_pointer_sym
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+else
+  as_fn_error $? "liburcu not found" "$LINENO" 5
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+$as_echo_n "checking for library containing dlopen... " >&6; }
+if test "${ac_cv_search_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dl; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_dlopen+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_dlopen+set}" = set; then :
+
+else
+  ac_cv_search_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+$as_echo "$ac_cv_search_dlopen" >&6; }
+ac_res=$ac_cv_search_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+#AC_SEARCH_LIBS([clock_gettime], [rt], [], [AC_MSG_ERROR([librt not found])])
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing OpenSSL_add_all_digests" >&5
+$as_echo_n "checking for library containing OpenSSL_add_all_digests... " >&6; }
+if test "${ac_cv_search_OpenSSL_add_all_digests+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char OpenSSL_add_all_digests ();
+int
+main ()
+{
+return OpenSSL_add_all_digests ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' crypto; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_OpenSSL_add_all_digests=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_OpenSSL_add_all_digests+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_OpenSSL_add_all_digests+set}" = set; then :
+
+else
+  ac_cv_search_OpenSSL_add_all_digests=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_OpenSSL_add_all_digests" >&5
+$as_echo "$ac_cv_search_OpenSSL_add_all_digests" >&6; }
+ac_res=$ac_cv_search_OpenSSL_add_all_digests
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+else
+  as_fn_error $? "libcrypto not found" "$LINENO" 5
+fi
+
+#AC_SEARCH_LIBS([ldns_rr_list_pop_rrset], [ldns], [], [AC_MSG_ERROR([libldns not found])])
+
+# Checks for header files.
+for ac_header in sys/types.h netinet/in.h arpa/nameser.h netdb.h resolv.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "#ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>   /* inet_ functions / structs */
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+#  include <arpa/nameser.h> /* DNS HEADER struct */
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+for ac_header in arpa/inet.h fcntl.h inttypes.h limits.h malloc.h netdb.h netinet/in.h stdint.h stdlib.h string.h strings.h sys/socket.h sys/time.h syslog.h unistd.h urcu.h ev.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+# Checks for typedefs, structures, and compiler characteristics.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for stdbool.h that conforms to C99" >&5
+$as_echo_n "checking for stdbool.h that conforms to C99... " >&6; }
+if test "${ac_cv_header_stdbool_h+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdbool.h>
+#ifndef bool
+ "error: bool is not defined"
+#endif
+#ifndef false
+ "error: false is not defined"
+#endif
+#if false
+ "error: false is not 0"
+#endif
+#ifndef true
+ "error: true is not defined"
+#endif
+#if true != 1
+ "error: true is not 1"
+#endif
+#ifndef __bool_true_false_are_defined
+ "error: __bool_true_false_are_defined is not defined"
+#endif
+
+	struct s { _Bool s: 1; _Bool t; } s;
+
+	char a[true == 1 ? 1 : -1];
+	char b[false == 0 ? 1 : -1];
+	char c[__bool_true_false_are_defined == 1 ? 1 : -1];
+	char d[(bool) 0.5 == true ? 1 : -1];
+	bool e = &s;
+	char f[(_Bool) 0.0 == false ? 1 : -1];
+	char g[true];
+	char h[sizeof (_Bool)];
+	char i[sizeof s.t];
+	enum { j = false, k = true, l = false * true, m = true * 256 };
+	/* The following fails for
+	   HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
+	_Bool n[m];
+	char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+	char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+#	if defined __xlc__ || defined __GNUC__
+	 /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
+	    reported by James Lemley on 2005-10-05; see
+	    http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
+	    This test is not quite right, since xlc is allowed to
+	    reject this program, as the initializer for xlcbug is
+	    not one of the forms that C requires support for.
+	    However, doing the test right would require a runtime
+	    test, and that would make cross-compilation harder.
+	    Let us hope that IBM fixes the xlc bug, and also adds
+	    support for this kind of constant expression.  In the
+	    meantime, this test will reject xlc, which is OK, since
+	    our stdbool.h substitute should suffice.  We also test
+	    this with GCC, where it should work, to detect more
+	    quickly whether someone messes up the test in the
+	    future.  */
+	 char digs[] = "0123456789";
+	 int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1);
+#	endif
+	/* Catch a bug in an HP-UX C compiler.  See
+	   http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+	   http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
+	 */
+	_Bool q = true;
+	_Bool *pq = &q;
+
+int
+main ()
+{
+
+	*pq |= q;
+	*pq |= ! q;
+	/* Refer to every declared value, to avoid compiler optimizations.  */
+	return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
+		+ !m + !n + !o + !p + !q + !pq);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_header_stdbool_h=yes
+else
+  ac_cv_header_stdbool_h=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdbool_h" >&5
+$as_echo "$ac_cv_header_stdbool_h" >&6; }
+ac_fn_c_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
+if test "x$ac_cv_type__Bool" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE__BOOL 1
+_ACEOF
+
+
+fi
+
+if test $ac_cv_header_stdbool_h = yes; then
+
+$as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
+
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
+$as_echo_n "checking for inline... " >&6; }
+if test "${ac_cv_c_inline+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_c_inline=no
+for ac_kw in inline __inline__ __inline; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#ifndef __cplusplus
+typedef int foo_t;
+static $ac_kw foo_t static_foo () {return 0; }
+$ac_kw foo_t foo () {return 0; }
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_inline=$ac_kw
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  test "$ac_cv_c_inline" != no && break
+done
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
+$as_echo "$ac_cv_c_inline" >&6; }
+
+case $ac_cv_c_inline in
+  inline | yes) ;;
+  *)
+    case $ac_cv_c_inline in
+      no) ac_val=;;
+      *) ac_val=$ac_cv_c_inline;;
+    esac
+    cat >>confdefs.h <<_ACEOF
+#ifndef __cplusplus
+#define inline $ac_val
+#endif
+_ACEOF
+    ;;
+esac
+
+ac_fn_c_find_intX_t "$LINENO" "64" "ac_cv_c_int64_t"
+case $ac_cv_c_int64_t in #(
+  no|yes) ;; #(
+  *)
+
+cat >>confdefs.h <<_ACEOF
+#define int64_t $ac_cv_c_int64_t
+_ACEOF
+;;
+esac
+
+ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default"
+if test "x$ac_cv_type_pid_t" = x""yes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define pid_t int
+_ACEOF
+
+fi
+
+ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
+if test "x$ac_cv_type_size_t" = x""yes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define size_t unsigned int
+_ACEOF
+
+fi
+
+ac_fn_c_check_type "$LINENO" "ssize_t" "ac_cv_type_ssize_t" "$ac_includes_default"
+if test "x$ac_cv_type_ssize_t" = x""yes; then :
+
+else
+
+cat >>confdefs.h <<_ACEOF
+#define ssize_t int
+_ACEOF
+
+fi
+
+ac_fn_c_find_uintX_t "$LINENO" "16" "ac_cv_c_uint16_t"
+case $ac_cv_c_uint16_t in #(
+  no|yes) ;; #(
+  *)
+
+
+cat >>confdefs.h <<_ACEOF
+#define uint16_t $ac_cv_c_uint16_t
+_ACEOF
+;;
+  esac
+
+ac_fn_c_find_uintX_t "$LINENO" "32" "ac_cv_c_uint32_t"
+case $ac_cv_c_uint32_t in #(
+  no|yes) ;; #(
+  *)
+
+$as_echo "#define _UINT32_T 1" >>confdefs.h
+
+
+cat >>confdefs.h <<_ACEOF
+#define uint32_t $ac_cv_c_uint32_t
+_ACEOF
+;;
+  esac
+
+ac_fn_c_find_uintX_t "$LINENO" "64" "ac_cv_c_uint64_t"
+case $ac_cv_c_uint64_t in #(
+  no|yes) ;; #(
+  *)
+
+$as_echo "#define _UINT64_T 1" >>confdefs.h
+
+
+cat >>confdefs.h <<_ACEOF
+#define uint64_t $ac_cv_c_uint64_t
+_ACEOF
+;;
+  esac
+
+ac_fn_c_find_uintX_t "$LINENO" "8" "ac_cv_c_uint8_t"
+case $ac_cv_c_uint8_t in #(
+  no|yes) ;; #(
+  *)
+
+$as_echo "#define _UINT8_T 1" >>confdefs.h
+
+
+cat >>confdefs.h <<_ACEOF
+#define uint8_t $ac_cv_c_uint8_t
+_ACEOF
+;;
+  esac
+
+
+# Checks for library functions.
+for ac_header in vfork.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "vfork.h" "ac_cv_header_vfork_h" "$ac_includes_default"
+if test "x$ac_cv_header_vfork_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_VFORK_H 1
+_ACEOF
+
+fi
+
+done
+
+for ac_func in fork vfork
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+if test "x$ac_cv_func_fork" = xyes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working fork" >&5
+$as_echo_n "checking for working fork... " >&6; }
+if test "${ac_cv_func_fork_works+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  ac_cv_func_fork_works=cross
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main ()
+{
+
+	  /* By Ruediger Kuhlmann. */
+	  return fork () < 0;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ac_cv_func_fork_works=yes
+else
+  ac_cv_func_fork_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_fork_works" >&5
+$as_echo "$ac_cv_func_fork_works" >&6; }
+
+else
+  ac_cv_func_fork_works=$ac_cv_func_fork
+fi
+if test "x$ac_cv_func_fork_works" = xcross; then
+  case $host in
+    *-*-amigaos* | *-*-msdosdjgpp*)
+      # Override, as these systems have only a dummy fork() stub
+      ac_cv_func_fork_works=no
+      ;;
+    *)
+      ac_cv_func_fork_works=yes
+      ;;
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&5
+$as_echo "$as_me: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&2;}
+fi
+ac_cv_func_vfork_works=$ac_cv_func_vfork
+if test "x$ac_cv_func_vfork" = xyes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working vfork" >&5
+$as_echo_n "checking for working vfork... " >&6; }
+if test "${ac_cv_func_vfork_works+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  ac_cv_func_vfork_works=cross
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+/* Thanks to Paul Eggert for this test.  */
+$ac_includes_default
+#include <sys/wait.h>
+#ifdef HAVE_VFORK_H
+# include <vfork.h>
+#endif
+/* On some sparc systems, changes by the child to local and incoming
+   argument registers are propagated back to the parent.  The compiler
+   is told about this with #include <vfork.h>, but some compilers
+   (e.g. gcc -O) don't grok <vfork.h>.  Test for this by using a
+   static variable whose address is put into a register that is
+   clobbered by the vfork.  */
+static void
+#ifdef __cplusplus
+sparc_address_test (int arg)
+# else
+sparc_address_test (arg) int arg;
+#endif
+{
+  static pid_t child;
+  if (!child) {
+    child = vfork ();
+    if (child < 0) {
+      perror ("vfork");
+      _exit(2);
+    }
+    if (!child) {
+      arg = getpid();
+      write(-1, "", 0);
+      _exit (arg);
+    }
+  }
+}
+
+int
+main ()
+{
+  pid_t parent = getpid ();
+  pid_t child;
+
+  sparc_address_test (0);
+
+  child = vfork ();
+
+  if (child == 0) {
+    /* Here is another test for sparc vfork register problems.  This
+       test uses lots of local variables, at least as many local
+       variables as main has allocated so far including compiler
+       temporaries.  4 locals are enough for gcc 1.40.3 on a Solaris
+       4.1.3 sparc, but we use 8 to be safe.  A buggy compiler should
+       reuse the register of parent for one of the local variables,
+       since it will think that parent can't possibly be used any more
+       in this routine.  Assigning to the local variable will thus
+       munge parent in the parent process.  */
+    pid_t
+      p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
+      p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
+    /* Convince the compiler that p..p7 are live; otherwise, it might
+       use the same hardware register for all 8 local variables.  */
+    if (p != p1 || p != p2 || p != p3 || p != p4
+	|| p != p5 || p != p6 || p != p7)
+      _exit(1);
+
+    /* On some systems (e.g. IRIX 3.3), vfork doesn't separate parent
+       from child file descriptors.  If the child closes a descriptor
+       before it execs or exits, this munges the parent's descriptor
+       as well.  Test for this by closing stdout in the child.  */
+    _exit(close(fileno(stdout)) != 0);
+  } else {
+    int status;
+    struct stat st;
+
+    while (wait(&status) != child)
+      ;
+    return (
+	 /* Was there some problem with vforking?  */
+	 child < 0
+
+	 /* Did the child fail?  (This shouldn't happen.)  */
+	 || status
+
+	 /* Did the vfork/compiler bug occur?  */
+	 || parent != getpid()
+
+	 /* Did the file descriptor bug occur?  */
+	 || fstat(fileno(stdout), &st) != 0
+	 );
+  }
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ac_cv_func_vfork_works=yes
+else
+  ac_cv_func_vfork_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_vfork_works" >&5
+$as_echo "$ac_cv_func_vfork_works" >&6; }
+
+fi;
+if test "x$ac_cv_func_fork_works" = xcross; then
+  ac_cv_func_vfork_works=$ac_cv_func_vfork
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&5
+$as_echo "$as_me: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&2;}
+fi
+
+if test "x$ac_cv_func_vfork_works" = xyes; then
+
+$as_echo "#define HAVE_WORKING_VFORK 1" >>confdefs.h
+
+else
+
+$as_echo "#define vfork fork" >>confdefs.h
+
+fi
+if test "x$ac_cv_func_fork_works" = xyes; then
+
+$as_echo "#define HAVE_WORKING_FORK 1" >>confdefs.h
+
+fi
+
+
+
+
+  for ac_header in $ac_header_list
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+
+
+
+
+
+
+for ac_func in getpagesize
+do :
+  ac_fn_c_check_func "$LINENO" "getpagesize" "ac_cv_func_getpagesize"
+if test "x$ac_cv_func_getpagesize" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_GETPAGESIZE 1
+_ACEOF
+
+fi
+done
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working mmap" >&5
+$as_echo_n "checking for working mmap... " >&6; }
+if test "${ac_cv_func_mmap_fixed_mapped+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  ac_cv_func_mmap_fixed_mapped=no
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+/* malloc might have been renamed as rpl_malloc. */
+#undef malloc
+
+/* Thanks to Mike Haertel and Jim Avera for this test.
+   Here is a matrix of mmap possibilities:
+	mmap private not fixed
+	mmap private fixed at somewhere currently unmapped
+	mmap private fixed at somewhere already mapped
+	mmap shared not fixed
+	mmap shared fixed at somewhere currently unmapped
+	mmap shared fixed at somewhere already mapped
+   For private mappings, we should verify that changes cannot be read()
+   back from the file, nor mmap's back from the file at a different
+   address.  (There have been systems where private was not correctly
+   implemented like the infamous i386 svr4.0, and systems where the
+   VM page cache was not coherent with the file system buffer cache
+   like early versions of FreeBSD and possibly contemporary NetBSD.)
+   For shared mappings, we should conversely verify that changes get
+   propagated back to all the places they're supposed to be.
+
+   Grep wants private fixed already mapped.
+   The main things grep needs to know about mmap are:
+   * does it exist and is it safe to write into the mmap'd area
+   * how to use it (BSD variants)  */
+
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#if !defined STDC_HEADERS && !defined HAVE_STDLIB_H
+char *malloc ();
+#endif
+
+/* This mess was copied from the GNU getpagesize.h.  */
+#ifndef HAVE_GETPAGESIZE
+# ifdef _SC_PAGESIZE
+#  define getpagesize() sysconf(_SC_PAGESIZE)
+# else /* no _SC_PAGESIZE */
+#  ifdef HAVE_SYS_PARAM_H
+#   include <sys/param.h>
+#   ifdef EXEC_PAGESIZE
+#    define getpagesize() EXEC_PAGESIZE
+#   else /* no EXEC_PAGESIZE */
+#    ifdef NBPG
+#     define getpagesize() NBPG * CLSIZE
+#     ifndef CLSIZE
+#      define CLSIZE 1
+#     endif /* no CLSIZE */
+#    else /* no NBPG */
+#     ifdef NBPC
+#      define getpagesize() NBPC
+#     else /* no NBPC */
+#      ifdef PAGESIZE
+#       define getpagesize() PAGESIZE
+#      endif /* PAGESIZE */
+#     endif /* no NBPC */
+#    endif /* no NBPG */
+#   endif /* no EXEC_PAGESIZE */
+#  else /* no HAVE_SYS_PARAM_H */
+#   define getpagesize() 8192	/* punt totally */
+#  endif /* no HAVE_SYS_PARAM_H */
+# endif /* no _SC_PAGESIZE */
+
+#endif /* no HAVE_GETPAGESIZE */
+
+int
+main ()
+{
+  char *data, *data2, *data3;
+  const char *cdata2;
+  int i, pagesize;
+  int fd, fd2;
+
+  pagesize = getpagesize ();
+
+  /* First, make a file with some known garbage in it. */
+  data = (char *) malloc (pagesize);
+  if (!data)
+    return 1;
+  for (i = 0; i < pagesize; ++i)
+    *(data + i) = rand ();
+  umask (0);
+  fd = creat ("conftest.mmap", 0600);
+  if (fd < 0)
+    return 2;
+  if (write (fd, data, pagesize) != pagesize)
+    return 3;
+  close (fd);
+
+  /* Next, check that the tail of a page is zero-filled.  File must have
+     non-zero length, otherwise we risk SIGBUS for entire page.  */
+  fd2 = open ("conftest.txt", O_RDWR | O_CREAT | O_TRUNC, 0600);
+  if (fd2 < 0)
+    return 4;
+  cdata2 = "";
+  if (write (fd2, cdata2, 1) != 1)
+    return 5;
+  data2 = (char *) mmap (0, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd2, 0L);
+  if (data2 == MAP_FAILED)
+    return 6;
+  for (i = 0; i < pagesize; ++i)
+    if (*(data2 + i))
+      return 7;
+  close (fd2);
+  if (munmap (data2, pagesize))
+    return 8;
+
+  /* Next, try to mmap the file at a fixed address which already has
+     something else allocated at it.  If we can, also make sure that
+     we see the same garbage.  */
+  fd = open ("conftest.mmap", O_RDWR);
+  if (fd < 0)
+    return 9;
+  if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE,
+		     MAP_PRIVATE | MAP_FIXED, fd, 0L))
+    return 10;
+  for (i = 0; i < pagesize; ++i)
+    if (*(data + i) != *(data2 + i))
+      return 11;
+
+  /* Finally, make sure that changes to the mapped area do not
+     percolate back to the file as seen by read().  (This is a bug on
+     some variants of i386 svr4.0.)  */
+  for (i = 0; i < pagesize; ++i)
+    *(data2 + i) = *(data2 + i) + 1;
+  data3 = (char *) malloc (pagesize);
+  if (!data3)
+    return 12;
+  if (read (fd, data3, pagesize) != pagesize)
+    return 13;
+  for (i = 0; i < pagesize; ++i)
+    if (*(data + i) != *(data3 + i))
+      return 14;
+  close (fd);
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  ac_cv_func_mmap_fixed_mapped=yes
+else
+  ac_cv_func_mmap_fixed_mapped=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_mmap_fixed_mapped" >&5
+$as_echo "$ac_cv_func_mmap_fixed_mapped" >&6; }
+if test $ac_cv_func_mmap_fixed_mapped = yes; then
+
+$as_echo "#define HAVE_MMAP 1" >>confdefs.h
+
+fi
+rm -f conftest.mmap conftest.txt
+
+for ac_func in gethostbyname gettimeofday memmove memset munmap regcomp select socket sqrt strcasecmp strchr strdup strerror strncasecmp strtol strtoul poll epoll_wait kqueue
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+ac_config_files="$ac_config_files Makefile samples/Makefile src/Makefile"
+
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, we kill variables containing newlines.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(
+  for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do
+    eval ac_val=\$$ac_var
+    case $ac_val in #(
+    *${as_nl}*)
+      case $ac_var in #(
+      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      esac
+      case $ac_var in #(
+      _ | IFS | as_nl) ;; #(
+      BASH_ARGV | BASH_SOURCE) eval $ac_var= ;; #(
+      *) { eval $ac_var=; unset $ac_var;} ;;
+      esac ;;
+    esac
+  done
+
+  (set) 2>&1 |
+    case $as_nl`(ac_space=' '; set) 2>&1` in #(
+    *${as_nl}ac_space=\ *)
+      # `set' does not quote correctly, so add quotes: double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \.
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;; #(
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
+      ;;
+    esac |
+    sort
+) |
+  sed '
+     /^ac_cv_env_/b end
+     t clear
+     :clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+     t end
+     s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     :end' >>confcache
+if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
+  if test -w "$cache_file"; then
+    test "x$cache_file" != "x/dev/null" &&
+      { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+$as_echo "$as_me: updating cache $cache_file" >&6;}
+    cat confcache >$cache_file
+  else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+$as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+DEFS=-DHAVE_CONFIG_H
+
+ac_libobjs=
+ac_ltlibobjs=
+U=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
+  ac_i=`$as_echo "$ac_i" | sed "$ac_script"`
+  # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
+  #    will be set to the directory where LIBOBJS objects are built.
+  as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
+  as_fn_append ac_ltlibobjs " \${LIBOBJDIR}$ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+ if test -n "$EXEEXT"; then
+  am__EXEEXT_TRUE=
+  am__EXEEXT_FALSE='#'
+else
+  am__EXEEXT_TRUE='#'
+  am__EXEEXT_FALSE=
+fi
+
+if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then
+  as_fn_error $? "conditional \"AMDEP\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${MAINTAINER_MODE_TRUE}" && test -z "${MAINTAINER_MODE_FALSE}"; then
+  as_fn_error $? "conditional \"MAINTAINER_MODE\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
+  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+
+: ${CONFIG_STATUS=./config.status}
+ac_write_fail=0
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+$as_echo "$as_me: creating $CONFIG_STATUS" >&6;}
+as_write_fail=0
+cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+
+SHELL=\${CONFIG_SHELL-$SHELL}
+export SHELL
+_ASEOF
+cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
+## -------------------- ##
+## M4sh Initialization. ##
+## -------------------- ##
+
+# Be more Bourne compatible
+DUALCASE=1; export DUALCASE # for MKS sh
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+  emulate sh
+  NULLCMD=:
+  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in #(
+  *posix*) :
+    set -o posix ;; #(
+  *) :
+     ;;
+esac
+fi
+
+
+as_nl='
+'
+export as_nl
+# Printing a long string crashes Solaris 7 /usr/bin/printf.
+as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
+as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
+# Prefer a ksh shell builtin over an external printf program on Solaris,
+# but without wasting forks for bash or zsh.
+if test -z "$BASH_VERSION$ZSH_VERSION" \
+    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='print -r --'
+  as_echo_n='print -rn --'
+elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
+  as_echo='printf %s\n'
+  as_echo_n='printf %s'
+else
+  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
+    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
+    as_echo_n='/usr/ucb/echo -n'
+  else
+    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
+    as_echo_n_body='eval
+      arg=$1;
+      case $arg in #(
+      *"$as_nl"*)
+	expr "X$arg" : "X\\(.*\\)$as_nl";
+	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
+      esac;
+      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
+    '
+    export as_echo_n_body
+    as_echo_n='sh -c $as_echo_n_body as_echo'
+  fi
+  export as_echo_body
+  as_echo='sh -c $as_echo_body as_echo'
+fi
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
+    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
+      PATH_SEPARATOR=';'
+  }
+fi
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.  Quoting is
+# there to prevent editors from complaining about space-tab.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+IFS=" ""	$as_nl"
+
+# Find who we are.  Look in the path if we contain no directory separator.
+case $0 in #((
+  *[\\/]* ) as_myself=$0 ;;
+  *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  done
+IFS=$as_save_IFS
+
+     ;;
+esac
+# We did not find ourselves, most probably we were run as `sh COMMAND'
+# in which case we are not to be found in the path.
+if test "x$as_myself" = x; then
+  as_myself=$0
+fi
+if test ! -f "$as_myself"; then
+  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  exit 1
+fi
+
+# Unset variables that we do not need and which cause bugs (e.g. in
+# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
+# suppresses any "Segmentation fault" message there.  '((' could
+# trigger a bug in pdksh 5.2.14.
+for as_var in BASH_ENV ENV MAIL MAILPATH
+do eval test x\${$as_var+set} = xset \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# CDPATH.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+
+# as_fn_error STATUS ERROR [LINENO LOG_FD]
+# ----------------------------------------
+# Output "`basename $0`: error: ERROR" to stderr. If LINENO and LOG_FD are
+# provided, also output the error to LOG_FD, referencing LINENO. Then exit the
+# script with STATUS, using 1 if that was 0.
+as_fn_error ()
+{
+  as_status=$1; test $as_status -eq 0 && as_status=1
+  if test "$4"; then
+    as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+  fi
+  $as_echo "$as_me: error: $2" >&2
+  as_fn_exit $as_status
+} # as_fn_error
+
+
+# as_fn_set_status STATUS
+# -----------------------
+# Set $? to STATUS, without forking.
+as_fn_set_status ()
+{
+  return $1
+} # as_fn_set_status
+
+# as_fn_exit STATUS
+# -----------------
+# Exit the shell with STATUS, even in a "trap 0" or "set -e" context.
+as_fn_exit ()
+{
+  set +e
+  as_fn_set_status $1
+  exit $1
+} # as_fn_exit
+
+# as_fn_unset VAR
+# ---------------
+# Portably unset VAR.
+as_fn_unset ()
+{
+  { eval $1=; unset $1;}
+}
+as_unset=as_fn_unset
+# as_fn_append VAR VALUE
+# ----------------------
+# Append the text in VALUE to the end of the definition contained in VAR. Take
+# advantage of any shell optimizations that allow amortized linear growth over
+# repeated appends, instead of the typical quadratic growth present in naive
+# implementations.
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+  eval 'as_fn_append ()
+  {
+    eval $1+=\$2
+  }'
+else
+  as_fn_append ()
+  {
+    eval $1=\$$1\$2
+  }
+fi # as_fn_append
+
+# as_fn_arith ARG...
+# ------------------
+# Perform arithmetic evaluation on the ARGs, and store the result in the
+# global $as_val. Take advantage of shells that can avoid forks. The arguments
+# must be portable across $(()) and expr.
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+  eval 'as_fn_arith ()
+  {
+    as_val=$(( $* ))
+  }'
+else
+  as_fn_arith ()
+  {
+    as_val=`expr "$@" || test $? -eq 1`
+  }
+fi # as_fn_arith
+
+
+if expr a : '\(a\)' >/dev/null 2>&1 &&
+   test "X`expr 00001 : '.*\(...\)'`" = X001; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename -- /) >/dev/null 2>&1 && test "X`basename -- / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+if (as_dir=`dirname -- /` && test "X$as_dir" = X/) >/dev/null 2>&1; then
+  as_dirname=dirname
+else
+  as_dirname=false
+fi
+
+as_me=`$as_basename -- "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\/\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+ECHO_C= ECHO_N= ECHO_T=
+case `echo -n x` in #(((((
+-n*)
+  case `echo 'xy\c'` in
+  *c*) ECHO_T='	';;	# ECHO_T is single tab character.
+  xy)  ECHO_C='\c';;
+  *)   echo `echo ksh88 bug on AIX 6.1` > /dev/null
+       ECHO_T='	';;
+  esac;;
+*)
+  ECHO_N='-n';;
+esac
+
+rm -f conf$$ conf$$.exe conf$$.file
+if test -d conf$$.dir; then
+  rm -f conf$$.dir/conf$$.file
+else
+  rm -f conf$$.dir
+  mkdir conf$$.dir 2>/dev/null
+fi
+if (echo >conf$$.file) 2>/dev/null; then
+  if ln -s conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s='ln -s'
+    # ... but there are two gotchas:
+    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
+    # In both cases, we have to default to `cp -p'.
+    ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
+      as_ln_s='cp -p'
+  elif ln conf$$.file conf$$ 2>/dev/null; then
+    as_ln_s=ln
+  else
+    as_ln_s='cp -p'
+  fi
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
+rmdir conf$$.dir 2>/dev/null
+
+
+# as_fn_mkdir_p
+# -------------
+# Create "$as_dir" as a directory, including parents if necessary.
+as_fn_mkdir_p ()
+{
+
+  case $as_dir in #(
+  -*) as_dir=./$as_dir;;
+  esac
+  test -d "$as_dir" || eval $as_mkdir_p || {
+    as_dirs=
+    while :; do
+      case $as_dir in #(
+      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *) as_qdir=$as_dir;;
+      esac
+      as_dirs="'$as_qdir' $as_dirs"
+      as_dir=`$as_dirname -- "$as_dir" ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      test -d "$as_dir" && break
+    done
+    test -z "$as_dirs" || eval "mkdir $as_dirs"
+  } || test -d "$as_dir" || as_fn_error $? "cannot create directory $as_dir"
+
+
+} # as_fn_mkdir_p
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p='mkdir -p "$as_dir"'
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+if test -x / >/dev/null 2>&1; then
+  as_test_x='test -x'
+else
+  if ls -dL / >/dev/null 2>&1; then
+    as_ls_L_option=L
+  else
+    as_ls_L_option=
+  fi
+  as_test_x='
+    eval sh -c '\''
+      if test -d "$1"; then
+	test -d "$1/.";
+      else
+	case $1 in #(
+	-*)set "./$1";;
+	esac;
+	case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in #((
+	???[sx]*):;;*)false;;esac;fi
+    '\'' sh
+  '
+fi
+as_executable_p=$as_test_x
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+exec 6>&1
+## ----------------------------------- ##
+## Main body of $CONFIG_STATUS script. ##
+## ----------------------------------- ##
+_ASEOF
+test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# Save the log message, to keep $0 and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.
+ac_log="
+This file was extended by knot $as_me 0.8, which was
+generated by GNU Autoconf 2.67.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+on `(hostname || uname -n) 2>/dev/null | sed 1q`
+"
+
+_ACEOF
+
+case $ac_config_files in *"
+"*) set x $ac_config_files; shift; ac_config_files=$*;;
+esac
+
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
+
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+# Files that config.status was made for.
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
+config_commands="$ac_config_commands"
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+ac_cs_usage="\
+\`$as_me' instantiates files and other configuration actions
+from templates according to the current configuration.  Unless the files
+and actions are specified as TAGs, all are instantiated by default.
+
+Usage: $0 [OPTION]... [TAG]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number and configuration settings, then exit
+      --config     print configuration, then exit
+  -q, --quiet, --silent
+                   do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+      --file=FILE[:TEMPLATE]
+                   instantiate the configuration file FILE
+      --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
+
+Configuration files:
+$config_files
+
+Configuration headers:
+$config_headers
+
+Configuration commands:
+$config_commands
+
+Report bugs to <knot-dns@labs.nic.cz>."
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
+ac_cs_version="\\
+knot config.status 0.8
+configured by $0, generated by GNU Autoconf 2.67,
+  with options \\"\$ac_cs_config\\"
+
+Copyright (C) 2010 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+
+ac_pwd='$ac_pwd'
+srcdir='$srcdir'
+INSTALL='$INSTALL'
+MKDIR_P='$MKDIR_P'
+AWK='$AWK'
+test -n "\$AWK" || AWK=awk
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# The default lists apply if the user does not specify any file.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=?*)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
+  *)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
+    $as_echo "$ac_cs_version"; exit ;;
+  --config | --confi | --conf | --con | --co | --c )
+    $as_echo "$ac_cs_config"; exit ;;
+  --debug | --debu | --deb | --de | --d | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
+    esac
+    as_fn_append CONFIG_FILES " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --he | --h)
+    # Conflict between --help and --header
+    as_fn_error $? "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+  --help | --hel | -h )
+    $as_echo "$ac_cs_usage"; exit ;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) as_fn_error $? "unrecognized option: \`$1'
+Try \`$0 --help' for more information." ;;
+
+  *) as_fn_append ac_config_targets " $1"
+     ac_need_defaults=false ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+if \$ac_cs_recheck; then
+  set X '$SHELL' '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+  shift
+  \$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6
+  CONFIG_SHELL='$SHELL'
+  export CONFIG_SHELL
+  exec "\$@"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+  $as_echo "$ac_log"
+} >&5
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+#
+# INIT-COMMANDS
+#
+AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"
+
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+sed_quote_subst='$sed_quote_subst'
+double_quote_subst='$double_quote_subst'
+delay_variable_subst='$delay_variable_subst'
+macro_version='`$ECHO "X$macro_version" | $Xsed -e "$delay_single_quote_subst"`'
+macro_revision='`$ECHO "X$macro_revision" | $Xsed -e "$delay_single_quote_subst"`'
+enable_shared='`$ECHO "X$enable_shared" | $Xsed -e "$delay_single_quote_subst"`'
+enable_static='`$ECHO "X$enable_static" | $Xsed -e "$delay_single_quote_subst"`'
+pic_mode='`$ECHO "X$pic_mode" | $Xsed -e "$delay_single_quote_subst"`'
+enable_fast_install='`$ECHO "X$enable_fast_install" | $Xsed -e "$delay_single_quote_subst"`'
+host_alias='`$ECHO "X$host_alias" | $Xsed -e "$delay_single_quote_subst"`'
+host='`$ECHO "X$host" | $Xsed -e "$delay_single_quote_subst"`'
+host_os='`$ECHO "X$host_os" | $Xsed -e "$delay_single_quote_subst"`'
+build_alias='`$ECHO "X$build_alias" | $Xsed -e "$delay_single_quote_subst"`'
+build='`$ECHO "X$build" | $Xsed -e "$delay_single_quote_subst"`'
+build_os='`$ECHO "X$build_os" | $Xsed -e "$delay_single_quote_subst"`'
+SED='`$ECHO "X$SED" | $Xsed -e "$delay_single_quote_subst"`'
+Xsed='`$ECHO "X$Xsed" | $Xsed -e "$delay_single_quote_subst"`'
+GREP='`$ECHO "X$GREP" | $Xsed -e "$delay_single_quote_subst"`'
+EGREP='`$ECHO "X$EGREP" | $Xsed -e "$delay_single_quote_subst"`'
+FGREP='`$ECHO "X$FGREP" | $Xsed -e "$delay_single_quote_subst"`'
+LD='`$ECHO "X$LD" | $Xsed -e "$delay_single_quote_subst"`'
+NM='`$ECHO "X$NM" | $Xsed -e "$delay_single_quote_subst"`'
+LN_S='`$ECHO "X$LN_S" | $Xsed -e "$delay_single_quote_subst"`'
+max_cmd_len='`$ECHO "X$max_cmd_len" | $Xsed -e "$delay_single_quote_subst"`'
+ac_objext='`$ECHO "X$ac_objext" | $Xsed -e "$delay_single_quote_subst"`'
+exeext='`$ECHO "X$exeext" | $Xsed -e "$delay_single_quote_subst"`'
+lt_unset='`$ECHO "X$lt_unset" | $Xsed -e "$delay_single_quote_subst"`'
+lt_SP2NL='`$ECHO "X$lt_SP2NL" | $Xsed -e "$delay_single_quote_subst"`'
+lt_NL2SP='`$ECHO "X$lt_NL2SP" | $Xsed -e "$delay_single_quote_subst"`'
+reload_flag='`$ECHO "X$reload_flag" | $Xsed -e "$delay_single_quote_subst"`'
+reload_cmds='`$ECHO "X$reload_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+OBJDUMP='`$ECHO "X$OBJDUMP" | $Xsed -e "$delay_single_quote_subst"`'
+deplibs_check_method='`$ECHO "X$deplibs_check_method" | $Xsed -e "$delay_single_quote_subst"`'
+file_magic_cmd='`$ECHO "X$file_magic_cmd" | $Xsed -e "$delay_single_quote_subst"`'
+AR='`$ECHO "X$AR" | $Xsed -e "$delay_single_quote_subst"`'
+AR_FLAGS='`$ECHO "X$AR_FLAGS" | $Xsed -e "$delay_single_quote_subst"`'
+STRIP='`$ECHO "X$STRIP" | $Xsed -e "$delay_single_quote_subst"`'
+RANLIB='`$ECHO "X$RANLIB" | $Xsed -e "$delay_single_quote_subst"`'
+old_postinstall_cmds='`$ECHO "X$old_postinstall_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+old_postuninstall_cmds='`$ECHO "X$old_postuninstall_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+old_archive_cmds='`$ECHO "X$old_archive_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+CC='`$ECHO "X$CC" | $Xsed -e "$delay_single_quote_subst"`'
+CFLAGS='`$ECHO "X$CFLAGS" | $Xsed -e "$delay_single_quote_subst"`'
+compiler='`$ECHO "X$compiler" | $Xsed -e "$delay_single_quote_subst"`'
+GCC='`$ECHO "X$GCC" | $Xsed -e "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_pipe='`$ECHO "X$lt_cv_sys_global_symbol_pipe" | $Xsed -e "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_cdecl='`$ECHO "X$lt_cv_sys_global_symbol_to_cdecl" | $Xsed -e "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_c_name_address='`$ECHO "X$lt_cv_sys_global_symbol_to_c_name_address" | $Xsed -e "$delay_single_quote_subst"`'
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix='`$ECHO "X$lt_cv_sys_global_symbol_to_c_name_address_lib_prefix" | $Xsed -e "$delay_single_quote_subst"`'
+objdir='`$ECHO "X$objdir" | $Xsed -e "$delay_single_quote_subst"`'
+SHELL='`$ECHO "X$SHELL" | $Xsed -e "$delay_single_quote_subst"`'
+ECHO='`$ECHO "X$ECHO" | $Xsed -e "$delay_single_quote_subst"`'
+MAGIC_CMD='`$ECHO "X$MAGIC_CMD" | $Xsed -e "$delay_single_quote_subst"`'
+lt_prog_compiler_no_builtin_flag='`$ECHO "X$lt_prog_compiler_no_builtin_flag" | $Xsed -e "$delay_single_quote_subst"`'
+lt_prog_compiler_wl='`$ECHO "X$lt_prog_compiler_wl" | $Xsed -e "$delay_single_quote_subst"`'
+lt_prog_compiler_pic='`$ECHO "X$lt_prog_compiler_pic" | $Xsed -e "$delay_single_quote_subst"`'
+lt_prog_compiler_static='`$ECHO "X$lt_prog_compiler_static" | $Xsed -e "$delay_single_quote_subst"`'
+lt_cv_prog_compiler_c_o='`$ECHO "X$lt_cv_prog_compiler_c_o" | $Xsed -e "$delay_single_quote_subst"`'
+need_locks='`$ECHO "X$need_locks" | $Xsed -e "$delay_single_quote_subst"`'
+DSYMUTIL='`$ECHO "X$DSYMUTIL" | $Xsed -e "$delay_single_quote_subst"`'
+NMEDIT='`$ECHO "X$NMEDIT" | $Xsed -e "$delay_single_quote_subst"`'
+LIPO='`$ECHO "X$LIPO" | $Xsed -e "$delay_single_quote_subst"`'
+OTOOL='`$ECHO "X$OTOOL" | $Xsed -e "$delay_single_quote_subst"`'
+OTOOL64='`$ECHO "X$OTOOL64" | $Xsed -e "$delay_single_quote_subst"`'
+libext='`$ECHO "X$libext" | $Xsed -e "$delay_single_quote_subst"`'
+shrext_cmds='`$ECHO "X$shrext_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+extract_expsyms_cmds='`$ECHO "X$extract_expsyms_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+archive_cmds_need_lc='`$ECHO "X$archive_cmds_need_lc" | $Xsed -e "$delay_single_quote_subst"`'
+enable_shared_with_static_runtimes='`$ECHO "X$enable_shared_with_static_runtimes" | $Xsed -e "$delay_single_quote_subst"`'
+export_dynamic_flag_spec='`$ECHO "X$export_dynamic_flag_spec" | $Xsed -e "$delay_single_quote_subst"`'
+whole_archive_flag_spec='`$ECHO "X$whole_archive_flag_spec" | $Xsed -e "$delay_single_quote_subst"`'
+compiler_needs_object='`$ECHO "X$compiler_needs_object" | $Xsed -e "$delay_single_quote_subst"`'
+old_archive_from_new_cmds='`$ECHO "X$old_archive_from_new_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+old_archive_from_expsyms_cmds='`$ECHO "X$old_archive_from_expsyms_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+archive_cmds='`$ECHO "X$archive_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+archive_expsym_cmds='`$ECHO "X$archive_expsym_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+module_cmds='`$ECHO "X$module_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+module_expsym_cmds='`$ECHO "X$module_expsym_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+with_gnu_ld='`$ECHO "X$with_gnu_ld" | $Xsed -e "$delay_single_quote_subst"`'
+allow_undefined_flag='`$ECHO "X$allow_undefined_flag" | $Xsed -e "$delay_single_quote_subst"`'
+no_undefined_flag='`$ECHO "X$no_undefined_flag" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_libdir_flag_spec='`$ECHO "X$hardcode_libdir_flag_spec" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_libdir_flag_spec_ld='`$ECHO "X$hardcode_libdir_flag_spec_ld" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_libdir_separator='`$ECHO "X$hardcode_libdir_separator" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_direct='`$ECHO "X$hardcode_direct" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_direct_absolute='`$ECHO "X$hardcode_direct_absolute" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_minus_L='`$ECHO "X$hardcode_minus_L" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_shlibpath_var='`$ECHO "X$hardcode_shlibpath_var" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_automatic='`$ECHO "X$hardcode_automatic" | $Xsed -e "$delay_single_quote_subst"`'
+inherit_rpath='`$ECHO "X$inherit_rpath" | $Xsed -e "$delay_single_quote_subst"`'
+link_all_deplibs='`$ECHO "X$link_all_deplibs" | $Xsed -e "$delay_single_quote_subst"`'
+fix_srcfile_path='`$ECHO "X$fix_srcfile_path" | $Xsed -e "$delay_single_quote_subst"`'
+always_export_symbols='`$ECHO "X$always_export_symbols" | $Xsed -e "$delay_single_quote_subst"`'
+export_symbols_cmds='`$ECHO "X$export_symbols_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+exclude_expsyms='`$ECHO "X$exclude_expsyms" | $Xsed -e "$delay_single_quote_subst"`'
+include_expsyms='`$ECHO "X$include_expsyms" | $Xsed -e "$delay_single_quote_subst"`'
+prelink_cmds='`$ECHO "X$prelink_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+file_list_spec='`$ECHO "X$file_list_spec" | $Xsed -e "$delay_single_quote_subst"`'
+variables_saved_for_relink='`$ECHO "X$variables_saved_for_relink" | $Xsed -e "$delay_single_quote_subst"`'
+need_lib_prefix='`$ECHO "X$need_lib_prefix" | $Xsed -e "$delay_single_quote_subst"`'
+need_version='`$ECHO "X$need_version" | $Xsed -e "$delay_single_quote_subst"`'
+version_type='`$ECHO "X$version_type" | $Xsed -e "$delay_single_quote_subst"`'
+runpath_var='`$ECHO "X$runpath_var" | $Xsed -e "$delay_single_quote_subst"`'
+shlibpath_var='`$ECHO "X$shlibpath_var" | $Xsed -e "$delay_single_quote_subst"`'
+shlibpath_overrides_runpath='`$ECHO "X$shlibpath_overrides_runpath" | $Xsed -e "$delay_single_quote_subst"`'
+libname_spec='`$ECHO "X$libname_spec" | $Xsed -e "$delay_single_quote_subst"`'
+library_names_spec='`$ECHO "X$library_names_spec" | $Xsed -e "$delay_single_quote_subst"`'
+soname_spec='`$ECHO "X$soname_spec" | $Xsed -e "$delay_single_quote_subst"`'
+postinstall_cmds='`$ECHO "X$postinstall_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+postuninstall_cmds='`$ECHO "X$postuninstall_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+finish_cmds='`$ECHO "X$finish_cmds" | $Xsed -e "$delay_single_quote_subst"`'
+finish_eval='`$ECHO "X$finish_eval" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_into_libs='`$ECHO "X$hardcode_into_libs" | $Xsed -e "$delay_single_quote_subst"`'
+sys_lib_search_path_spec='`$ECHO "X$sys_lib_search_path_spec" | $Xsed -e "$delay_single_quote_subst"`'
+sys_lib_dlsearch_path_spec='`$ECHO "X$sys_lib_dlsearch_path_spec" | $Xsed -e "$delay_single_quote_subst"`'
+hardcode_action='`$ECHO "X$hardcode_action" | $Xsed -e "$delay_single_quote_subst"`'
+enable_dlopen='`$ECHO "X$enable_dlopen" | $Xsed -e "$delay_single_quote_subst"`'
+enable_dlopen_self='`$ECHO "X$enable_dlopen_self" | $Xsed -e "$delay_single_quote_subst"`'
+enable_dlopen_self_static='`$ECHO "X$enable_dlopen_self_static" | $Xsed -e "$delay_single_quote_subst"`'
+old_striplib='`$ECHO "X$old_striplib" | $Xsed -e "$delay_single_quote_subst"`'
+striplib='`$ECHO "X$striplib" | $Xsed -e "$delay_single_quote_subst"`'
+
+LTCC='$LTCC'
+LTCFLAGS='$LTCFLAGS'
+compiler='$compiler_DEFAULT'
+
+# Quote evaled strings.
+for var in SED \
+GREP \
+EGREP \
+FGREP \
+LD \
+NM \
+LN_S \
+lt_SP2NL \
+lt_NL2SP \
+reload_flag \
+OBJDUMP \
+deplibs_check_method \
+file_magic_cmd \
+AR \
+AR_FLAGS \
+STRIP \
+RANLIB \
+CC \
+CFLAGS \
+compiler \
+lt_cv_sys_global_symbol_pipe \
+lt_cv_sys_global_symbol_to_cdecl \
+lt_cv_sys_global_symbol_to_c_name_address \
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix \
+SHELL \
+ECHO \
+lt_prog_compiler_no_builtin_flag \
+lt_prog_compiler_wl \
+lt_prog_compiler_pic \
+lt_prog_compiler_static \
+lt_cv_prog_compiler_c_o \
+need_locks \
+DSYMUTIL \
+NMEDIT \
+LIPO \
+OTOOL \
+OTOOL64 \
+shrext_cmds \
+export_dynamic_flag_spec \
+whole_archive_flag_spec \
+compiler_needs_object \
+with_gnu_ld \
+allow_undefined_flag \
+no_undefined_flag \
+hardcode_libdir_flag_spec \
+hardcode_libdir_flag_spec_ld \
+hardcode_libdir_separator \
+fix_srcfile_path \
+exclude_expsyms \
+include_expsyms \
+file_list_spec \
+variables_saved_for_relink \
+libname_spec \
+library_names_spec \
+soname_spec \
+finish_eval \
+old_striplib \
+striplib; do
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[\\\\\\\`\\"\\\$]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$sed_quote_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Double-quote double-evaled strings.
+for var in reload_cmds \
+old_postinstall_cmds \
+old_postuninstall_cmds \
+old_archive_cmds \
+extract_expsyms_cmds \
+old_archive_from_new_cmds \
+old_archive_from_expsyms_cmds \
+archive_cmds \
+archive_expsym_cmds \
+module_cmds \
+module_expsym_cmds \
+export_symbols_cmds \
+prelink_cmds \
+postinstall_cmds \
+postuninstall_cmds \
+finish_cmds \
+sys_lib_search_path_spec \
+sys_lib_dlsearch_path_spec; do
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[\\\\\\\`\\"\\\$]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Fix-up fallback echo if it was mangled by the above quoting rules.
+case \$lt_ECHO in
+*'\\\$0 --fallback-echo"')  lt_ECHO=\`\$ECHO "X\$lt_ECHO" | \$Xsed -e 's/\\\\\\\\\\\\\\\$0 --fallback-echo"\$/\$0 --fallback-echo"/'\`
+  ;;
+esac
+
+ac_aux_dir='$ac_aux_dir'
+xsi_shell='$xsi_shell'
+lt_shell_append='$lt_shell_append'
+
+# See if we are running on zsh, and set the options which allow our
+# commands through without removal of \ escapes INIT.
+if test -n "\${ZSH_VERSION+set}" ; then
+   setopt NO_GLOB_SUBST
+fi
+
+
+    PACKAGE='$PACKAGE'
+    VERSION='$VERSION'
+    TIMESTAMP='$TIMESTAMP'
+    RM='$RM'
+    ofile='$ofile'
+
+
+
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+
+# Handling of arguments.
+for ac_config_target in $ac_config_targets
+do
+  case $ac_config_target in
+    "src/config.h") CONFIG_HEADERS="$CONFIG_HEADERS src/config.h" ;;
+    "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "libtool") CONFIG_COMMANDS="$CONFIG_COMMANDS libtool" ;;
+    "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+    "samples/Makefile") CONFIG_FILES="$CONFIG_FILES samples/Makefile" ;;
+    "src/Makefile") CONFIG_FILES="$CONFIG_FILES src/Makefile" ;;
+
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5 ;;
+  esac
+done
+
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+  test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
+  test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason against having it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Hook for its removal unless debugging.
+# Note that there is a small window in which the directory will not be cleaned:
+# after its creation but before its name has been assigned to `$tmp'.
+$debug ||
+{
+  tmp=
+  trap 'exit_status=$?
+  { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
+' 0
+  trap 'as_fn_exit 1' 1 2 13 15
+}
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
+  test -n "$tmp" && test -d "$tmp"
+}  ||
+{
+  tmp=./conf$$-$RANDOM
+  (umask 077 && mkdir "$tmp")
+} || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+
+# Set up the scripts for CONFIG_FILES section.
+# No need to generate them if there are no CONFIG_FILES.
+# This happens for instance with `./config.status config.h'.
+if test -n "$CONFIG_FILES"; then
+
+
+ac_cr=`echo X | tr X '\015'`
+# On cygwin, bash can eat \r inside `` if the user requested igncr.
+# But we know of no other shell where ac_cr would be empty at this
+# point, so we can use a bashism as a fallback.
+if test "x$ac_cr" = x; then
+  eval ac_cr=\$\'\\r\'
+fi
+ac_cs_awk_cr=`$AWK 'BEGIN { print "a\rb" }' </dev/null 2>/dev/null`
+if test "$ac_cs_awk_cr" = "a${ac_cr}b"; then
+  ac_cs_awk_cr='\\r'
+else
+  ac_cs_awk_cr=$ac_cr
+fi
+
+echo 'BEGIN {' >"$tmp/subs1.awk" &&
+_ACEOF
+
+
+{
+  echo "cat >conf$$subs.awk <<_ACEOF" &&
+  echo "$ac_subst_vars" | sed 's/.*/&!$&$ac_delim/' &&
+  echo "_ACEOF"
+} >conf$$subs.sh ||
+  as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+ac_delim_num=`echo "$ac_subst_vars" | grep -c '^'`
+ac_delim='%!_!# '
+for ac_last_try in false false false false false :; do
+  . ./conf$$subs.sh ||
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+
+  ac_delim_n=`sed -n "s/.*$ac_delim\$/X/p" conf$$subs.awk | grep -c X`
+  if test $ac_delim_n = $ac_delim_num; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_STATUS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+rm -f conf$$subs.sh
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+cat >>"\$tmp/subs1.awk" <<\\_ACAWK &&
+_ACEOF
+sed -n '
+h
+s/^/S["/; s/!.*/"]=/
+p
+g
+s/^[^!]*!//
+:repl
+t repl
+s/'"$ac_delim"'$//
+t delim
+:nl
+h
+s/\(.\{148\}\)..*/\1/
+t more1
+s/["\\]/\\&/g; s/^/"/; s/$/\\n"\\/
+p
+n
+b repl
+:more1
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t nl
+:delim
+h
+s/\(.\{148\}\)..*/\1/
+t more2
+s/["\\]/\\&/g; s/^/"/; s/$/"/
+p
+b
+:more2
+s/["\\]/\\&/g; s/^/"/; s/$/"\\/
+p
+g
+s/.\{148\}//
+t delim
+' <conf$$subs.awk | sed '
+/^[^""]/{
+  N
+  s/\n//
+}
+' >>$CONFIG_STATUS || ac_write_fail=1
+rm -f conf$$subs.awk
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+_ACAWK
+cat >>"\$tmp/subs1.awk" <<_ACAWK &&
+  for (key in S) S_is_set[key] = 1
+  FS = ""
+
+}
+{
+  line = $ 0
+  nfields = split(line, field, "@")
+  substed = 0
+  len = length(field[1])
+  for (i = 2; i < nfields; i++) {
+    key = field[i]
+    keylen = length(key)
+    if (S_is_set[key]) {
+      value = S[key]
+      line = substr(line, 1, len) "" value "" substr(line, len + keylen + 3)
+      len += length(value) + length(field[++i])
+      substed = 1
+    } else
+      len += 1 + keylen
+  }
+
+  print line
+}
+
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
+  sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
+else
+  cat
+fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
+  || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
+_ACEOF
+
+# VPATH may cause trouble with some makes, so we remove sole $(srcdir),
+# ${srcdir} and @srcdir@ entries from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=[	 ]*/{
+h
+s///
+s/^/:/
+s/[	 ]*$/:/
+s/:\$(srcdir):/:/g
+s/:\${srcdir}:/:/g
+s/:@srcdir@:/:/g
+s/^:*//
+s/:*$//
+x
+s/\(=[	 ]*\).*/\1/
+G
+s/\n//
+s/^[^=]*=[	 ]*$//
+}'
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+fi # test -n "$CONFIG_FILES"
+
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+  ac_t=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_t"; then
+    break
+  elif $ac_last_try; then
+    as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
+
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any.  Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  for (key in D) D_is_set[key] = 1
+  FS = ""
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+  line = \$ 0
+  split(line, arg, " ")
+  if (arg[1] == "#") {
+    defundef = arg[2]
+    mac1 = arg[3]
+  } else {
+    defundef = substr(arg[1], 2)
+    mac1 = arg[2]
+  }
+  split(mac1, mac2, "(") #)
+  macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
+  if (D_is_set[macro]) {
+    # Preserve the white space surrounding the "#".
+    print prefix "define", macro P[macro] D[macro]
+    next
+  } else {
+    # Replace #undef with comments.  This is necessary, for example,
+    # in the case of _POSIX_SOURCE, which is predefined and required
+    # on some systems where configure will not decide to define it.
+    if (defundef == "undef") {
+      print "/*", prefix defundef, macro, "*/"
+      next
+    }
+  }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+  as_fn_error $? "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS    :C $CONFIG_COMMANDS"
+shift
+for ac_tag
+do
+  case $ac_tag in
+  :[FHLC]) ac_mode=$ac_tag; continue;;
+  esac
+  case $ac_mode$ac_tag in
+  :[FHL]*:*);;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5 ;;
+  :[FH]-) ac_tag=-:-;;
+  :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
+  esac
+  ac_save_IFS=$IFS
+  IFS=:
+  set x $ac_tag
+  IFS=$ac_save_IFS
+  shift
+  ac_file=$1
+  shift
+
+  case $ac_mode in
+  :L) ac_source=$1;;
+  :[FH])
+    ac_file_inputs=
+    for ac_f
+    do
+      case $ac_f in
+      -) ac_f="$tmp/stdin";;
+      *) # Look for the file first in the build tree, then in the source tree
+	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
+	 # because $ac_f cannot contain `:'.
+	 test -f "$ac_f" ||
+	   case $ac_f in
+	   [\\/$]*) false;;
+	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
+	   esac ||
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5 ;;
+      esac
+      case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      as_fn_append ac_file_inputs " '$ac_f'"
+    done
+
+    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # use $as_me), people would be surprised to read:
+    #    /* config.h.  Generated by config.status.  */
+    configure_input='Generated from '`
+	  $as_echo "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	`' by configure.'
+    if test x"$ac_file" != x-; then
+      configure_input="$ac_file.  $configure_input"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+$as_echo "$as_me: creating $ac_file" >&6;}
+    fi
+    # Neutralize special characters interpreted by sed in replacement strings.
+    case $configure_input in #(
+    *\&* | *\|* | *\\* )
+       ac_sed_conf_input=`$as_echo "$configure_input" |
+       sed 's/[\\\\&|]/\\\\&/g'`;; #(
+    *) ac_sed_conf_input=$configure_input;;
+    esac
+
+    case $ac_tag in
+    *:-:* | *:-) cat >"$tmp/stdin" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5  ;;
+    esac
+    ;;
+  esac
+
+  ac_dir=`$as_dirname -- "$ac_file" ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$ac_file" : 'X\(//\)[^/]' \| \
+	 X"$ac_file" : 'X\(//\)$' \| \
+	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+  as_dir="$ac_dir"; as_fn_mkdir_p
+  ac_builddir=.
+
+case "$ac_dir" in
+.) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
+*)
+  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  # A ".." for each directory in $ac_dir_suffix.
+  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  case $ac_top_builddir_sub in
+  "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
+  *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
+  esac ;;
+esac
+ac_abs_top_builddir=$ac_pwd
+ac_abs_builddir=$ac_pwd$ac_dir_suffix
+# for backward compatibility:
+ac_top_builddir=$ac_top_build_prefix
+
+case $srcdir in
+  .)  # We are building in place.
+    ac_srcdir=.
+    ac_top_srcdir=$ac_top_builddir_sub
+    ac_abs_top_srcdir=$ac_pwd ;;
+  [\\/]* | ?:[\\/]* )  # Absolute name.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir
+    ac_abs_top_srcdir=$srcdir ;;
+  *) # Relative name.
+    ac_srcdir=$ac_top_build_prefix$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_build_prefix$srcdir
+    ac_abs_top_srcdir=$ac_pwd/$srcdir ;;
+esac
+ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
+
+
+  case $ac_mode in
+  :F)
+  #
+  # CONFIG_FILE
+  #
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_build_prefix$INSTALL ;;
+  esac
+  ac_MKDIR_P=$MKDIR_P
+  case $MKDIR_P in
+  [\\/$]* | ?:[\\/]* ) ;;
+  */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
+  esac
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+# If the template does not know about datarootdir, expand it.
+# FIXME: This hack should be removed a few years after 2.60.
+ac_datarootdir_hack=; ac_datarootdir_seen=
+ac_sed_dataroot='
+/datarootdir/ {
+  p
+  q
+}
+/@datadir@/p
+/@docdir@/p
+/@infodir@/p
+/@localedir@/p
+/@mandir@/p'
+case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
+*datarootdir*) ac_datarootdir_seen=yes;;
+*@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+$as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  ac_datarootdir_hack='
+  s&@datadir@&$datadir&g
+  s&@docdir@&$docdir&g
+  s&@infodir@&$infodir&g
+  s&@localedir@&$localedir&g
+  s&@mandir@&$mandir&g
+  s&\\\${datarootdir}&$datarootdir&g' ;;
+esac
+_ACEOF
+
+# Neutralize VPATH when `$srcdir' = `.'.
+# Shell code in configure.ac might set extrasub.
+# FIXME: do we really want to maintain this feature?
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+ac_sed_extra="$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s|@configure_input@|$ac_sed_conf_input|;t t
+s&@top_builddir@&$ac_top_builddir_sub&;t t
+s&@top_build_prefix@&$ac_top_build_prefix&;t t
+s&@srcdir@&$ac_srcdir&;t t
+s&@abs_srcdir@&$ac_abs_srcdir&;t t
+s&@top_srcdir@&$ac_top_srcdir&;t t
+s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
+s&@builddir@&$ac_builddir&;t t
+s&@abs_builddir@&$ac_abs_builddir&;t t
+s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
+s&@INSTALL@&$ac_INSTALL&;t t
+s&@MKDIR_P@&$ac_MKDIR_P&;t t
+$ac_datarootdir_hack
+"
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk" >$tmp/out \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+
+test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' "$tmp/out"`; test -z "$ac_out"; } &&
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&5
+$as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+which seems to be undefined.  Please make sure it is defined" >&2;}
+
+  rm -f "$tmp/stdin"
+  case $ac_file in
+  -) cat "$tmp/out" && rm -f "$tmp/out";;
+  *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
+  esac \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+ ;;
+  :H)
+  #
+  # CONFIG_HEADER
+  #
+  if test x"$ac_file" != x-; then
+    {
+      $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs"
+    } >"$tmp/config.h" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    if diff "$ac_file" "$tmp/config.h" >/dev/null 2>&1; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+$as_echo "$as_me: $ac_file is unchanged" >&6;}
+    else
+      rm -f "$ac_file"
+      mv "$tmp/config.h" "$ac_file" \
+	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
+    fi
+  else
+    $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs" \
+      || as_fn_error $? "could not create -" "$LINENO" 5
+  fi
+# Compute "$ac_file"'s index in $config_headers.
+_am_arg="$ac_file"
+_am_stamp_count=1
+for _am_header in $config_headers :; do
+  case $_am_header in
+    $_am_arg | $_am_arg:* )
+      break ;;
+    * )
+      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
+  esac
+done
+echo "timestamp for $_am_arg" >`$as_dirname -- "$_am_arg" ||
+$as_expr X"$_am_arg" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$_am_arg" : 'X\(//\)[^/]' \| \
+	 X"$_am_arg" : 'X\(//\)$' \| \
+	 X"$_am_arg" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$_am_arg" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`/stamp-h$_am_stamp_count
+ ;;
+
+  :C)  { $as_echo "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+$as_echo "$as_me: executing $ac_file commands" >&6;}
+ ;;
+  esac
+
+
+  case $ac_file$ac_mode in
+    "depfiles":C) test x"$AMDEP_TRUE" != x"" || {
+  # Autoconf 2.62 quotes --file arguments for eval, but not when files
+  # are listed without --file.  Let's play safe and only enable the eval
+  # if we detect the quoting.
+  case $CONFIG_FILES in
+  *\'*) eval set x "$CONFIG_FILES" ;;
+  *)   set x $CONFIG_FILES ;;
+  esac
+  shift
+  for mf
+  do
+    # Strip MF so we end up with the name of the file.
+    mf=`echo "$mf" | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile or not.
+    # We used to match only the files named `Makefile.in', but
+    # some people rename them; so instead we look at the file content.
+    # Grep'ing the first line is not enough: some people post-process
+    # each Makefile.in and add a new line on top of each file to say so.
+    # Grep'ing the whole file is not good either: AIX grep has a line
+    # limit of 2048, but all sed's we know have understand at least 4000.
+    if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then
+      dirpart=`$as_dirname -- "$mf" ||
+$as_expr X"$mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$mf" : 'X\(//\)[^/]' \| \
+	 X"$mf" : 'X\(//\)$' \| \
+	 X"$mf" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$mf" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+    else
+      continue
+    fi
+    # Extract the definition of DEPDIR, am__include, and am__quote
+    # from the Makefile without running `make'.
+    DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"`
+    test -z "$DEPDIR" && continue
+    am__include=`sed -n 's/^am__include = //p' < "$mf"`
+    test -z "am__include" && continue
+    am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
+    # When using ansi2knr, U may be empty or an underscore; expand it
+    U=`sed -n 's/^U = //p' < "$mf"`
+    # Find all dependency output files, they are included files with
+    # $(DEPDIR) in their names.  We invoke sed twice because it is the
+    # simplest approach to changing $(DEPDIR) to its actual value in the
+    # expansion.
+    for file in `sed -n "
+      s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
+	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g' -e 's/\$U/'"$U"'/g'`; do
+      # Make sure the directory exists.
+      test -f "$dirpart/$file" && continue
+      fdir=`$as_dirname -- "$file" ||
+$as_expr X"$file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$file" : 'X\(//\)[^/]' \| \
+	 X"$file" : 'X\(//\)$' \| \
+	 X"$file" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)[^/].*/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\/\)$/{
+	    s//\1/
+	    q
+	  }
+	  /^X\(\/\).*/{
+	    s//\1/
+	    q
+	  }
+	  s/.*/./; q'`
+      as_dir=$dirpart/$fdir; as_fn_mkdir_p
+      # echo "creating $dirpart/$file"
+      echo '# dummy' > "$dirpart/$file"
+    done
+  done
+}
+ ;;
+    "libtool":C)
+
+    # See if we are running on zsh, and set the options which allow our
+    # commands through without removal of \ escapes.
+    if test -n "${ZSH_VERSION+set}" ; then
+      setopt NO_GLOB_SUBST
+    fi
+
+    cfgfile="${ofile}T"
+    trap "$RM \"$cfgfile\"; exit 1" 1 2 15
+    $RM "$cfgfile"
+
+    cat <<_LT_EOF >> "$cfgfile"
+#! $SHELL
+
+# `$ECHO "$ofile" | sed 's%^.*/%%'` - Provide generalized library-building support services.
+# Generated automatically by $as_me ($PACKAGE$TIMESTAMP) $VERSION
+# Libtool was configured on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+# NOTE: Changes made to this file will be lost: look at ltmain.sh.
+#
+#   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
+#                 2006, 2007, 2008 Free Software Foundation, Inc.
+#   Written by Gordon Matzigkeit, 1996
+#
+#   This file is part of GNU Libtool.
+#
+# GNU Libtool is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# As a special exception to the GNU General Public License,
+# if you distribute this file as part of a program or library that
+# is built using GNU Libtool, you may include this file under the
+# same distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Libtool; see the file COPYING.  If not, a copy
+# can be downloaded from http://www.gnu.org/licenses/gpl.html, or
+# obtained by writing to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+
+# The names of the tagged configurations supported by this script.
+available_tags=""
+
+# ### BEGIN LIBTOOL CONFIG
+
+# Which release of libtool.m4 was used?
+macro_version=$macro_version
+macro_revision=$macro_revision
+
+# Whether or not to build shared libraries.
+build_libtool_libs=$enable_shared
+
+# Whether or not to build static libraries.
+build_old_libs=$enable_static
+
+# What type of objects to build.
+pic_mode=$pic_mode
+
+# Whether or not to optimize for fast installation.
+fast_install=$enable_fast_install
+
+# The host system.
+host_alias=$host_alias
+host=$host
+host_os=$host_os
+
+# The build system.
+build_alias=$build_alias
+build=$build
+build_os=$build_os
+
+# A sed program that does not truncate output.
+SED=$lt_SED
+
+# Sed that helps us avoid accidentally triggering echo(1) options like -n.
+Xsed="\$SED -e 1s/^X//"
+
+# A grep program that handles long lines.
+GREP=$lt_GREP
+
+# An ERE matcher.
+EGREP=$lt_EGREP
+
+# A literal string matcher.
+FGREP=$lt_FGREP
+
+# A BSD- or MS-compatible name lister.
+NM=$lt_NM
+
+# Whether we need soft or hard links.
+LN_S=$lt_LN_S
+
+# What is the maximum length of a command?
+max_cmd_len=$max_cmd_len
+
+# Object file suffix (normally "o").
+objext=$ac_objext
+
+# Executable file suffix (normally "").
+exeext=$exeext
+
+# whether the shell understands "unset".
+lt_unset=$lt_unset
+
+# turn spaces into newlines.
+SP2NL=$lt_lt_SP2NL
+
+# turn newlines into spaces.
+NL2SP=$lt_lt_NL2SP
+
+# How to create reloadable object files.
+reload_flag=$lt_reload_flag
+reload_cmds=$lt_reload_cmds
+
+# An object symbol dumper.
+OBJDUMP=$lt_OBJDUMP
+
+# Method to check whether dependent libraries are shared objects.
+deplibs_check_method=$lt_deplibs_check_method
+
+# Command to use when deplibs_check_method == "file_magic".
+file_magic_cmd=$lt_file_magic_cmd
+
+# The archiver.
+AR=$lt_AR
+AR_FLAGS=$lt_AR_FLAGS
+
+# A symbol stripping program.
+STRIP=$lt_STRIP
+
+# Commands used to install an old-style archive.
+RANLIB=$lt_RANLIB
+old_postinstall_cmds=$lt_old_postinstall_cmds
+old_postuninstall_cmds=$lt_old_postuninstall_cmds
+
+# A C compiler.
+LTCC=$lt_CC
+
+# LTCC compiler flags.
+LTCFLAGS=$lt_CFLAGS
+
+# Take the output of nm and produce a listing of raw symbols and C names.
+global_symbol_pipe=$lt_lt_cv_sys_global_symbol_pipe
+
+# Transform the output of nm in a proper C declaration.
+global_symbol_to_cdecl=$lt_lt_cv_sys_global_symbol_to_cdecl
+
+# Transform the output of nm in a C name address pair.
+global_symbol_to_c_name_address=$lt_lt_cv_sys_global_symbol_to_c_name_address
+
+# Transform the output of nm in a C name address pair when lib prefix is needed.
+global_symbol_to_c_name_address_lib_prefix=$lt_lt_cv_sys_global_symbol_to_c_name_address_lib_prefix
+
+# The name of the directory that contains temporary libtool files.
+objdir=$objdir
+
+# Shell to use when invoking shell scripts.
+SHELL=$lt_SHELL
+
+# An echo program that does not interpret backslashes.
+ECHO=$lt_ECHO
+
+# Used to examine libraries when file_magic_cmd begins with "file".
+MAGIC_CMD=$MAGIC_CMD
+
+# Must we lock files when doing compilation?
+need_locks=$lt_need_locks
+
+# Tool to manipulate archived DWARF debug symbol files on Mac OS X.
+DSYMUTIL=$lt_DSYMUTIL
+
+# Tool to change global to local symbols on Mac OS X.
+NMEDIT=$lt_NMEDIT
+
+# Tool to manipulate fat objects and archives on Mac OS X.
+LIPO=$lt_LIPO
+
+# ldd/readelf like tool for Mach-O binaries on Mac OS X.
+OTOOL=$lt_OTOOL
+
+# ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4.
+OTOOL64=$lt_OTOOL64
+
+# Old archive suffix (normally "a").
+libext=$libext
+
+# Shared library suffix (normally ".so").
+shrext_cmds=$lt_shrext_cmds
+
+# The commands to extract the exported symbol list from a shared archive.
+extract_expsyms_cmds=$lt_extract_expsyms_cmds
+
+# Variables whose values should be saved in libtool wrapper scripts and
+# restored at link time.
+variables_saved_for_relink=$lt_variables_saved_for_relink
+
+# Do we need the "lib" prefix for modules?
+need_lib_prefix=$need_lib_prefix
+
+# Do we need a version for libraries?
+need_version=$need_version
+
+# Library versioning type.
+version_type=$version_type
+
+# Shared library runtime path variable.
+runpath_var=$runpath_var
+
+# Shared library path variable.
+shlibpath_var=$shlibpath_var
+
+# Is shlibpath searched before the hard-coded library search path?
+shlibpath_overrides_runpath=$shlibpath_overrides_runpath
+
+# Format of library name prefix.
+libname_spec=$lt_libname_spec
+
+# List of archive names.  First name is the real one, the rest are links.
+# The last name is the one that the linker finds with -lNAME
+library_names_spec=$lt_library_names_spec
+
+# The coded name of the library, if different from the real name.
+soname_spec=$lt_soname_spec
+
+# Command to use after installation of a shared archive.
+postinstall_cmds=$lt_postinstall_cmds
+
+# Command to use after uninstallation of a shared archive.
+postuninstall_cmds=$lt_postuninstall_cmds
+
+# Commands used to finish a libtool library installation in a directory.
+finish_cmds=$lt_finish_cmds
+
+# As "finish_cmds", except a single script fragment to be evaled but
+# not shown.
+finish_eval=$lt_finish_eval
+
+# Whether we should hardcode library paths into libraries.
+hardcode_into_libs=$hardcode_into_libs
+
+# Compile-time system search path for libraries.
+sys_lib_search_path_spec=$lt_sys_lib_search_path_spec
+
+# Run-time system search path for libraries.
+sys_lib_dlsearch_path_spec=$lt_sys_lib_dlsearch_path_spec
+
+# Whether dlopen is supported.
+dlopen_support=$enable_dlopen
+
+# Whether dlopen of programs is supported.
+dlopen_self=$enable_dlopen_self
+
+# Whether dlopen of statically linked programs is supported.
+dlopen_self_static=$enable_dlopen_self_static
+
+# Commands to strip libraries.
+old_striplib=$lt_old_striplib
+striplib=$lt_striplib
+
+
+# The linker used to build libraries.
+LD=$lt_LD
+
+# Commands used to build an old-style archive.
+old_archive_cmds=$lt_old_archive_cmds
+
+# A language specific compiler.
+CC=$lt_compiler
+
+# Is the compiler the GNU compiler?
+with_gcc=$GCC
+
+# Compiler flag to turn off builtin functions.
+no_builtin_flag=$lt_lt_prog_compiler_no_builtin_flag
+
+# How to pass a linker flag through the compiler.
+wl=$lt_lt_prog_compiler_wl
+
+# Additional compiler flags for building library objects.
+pic_flag=$lt_lt_prog_compiler_pic
+
+# Compiler flag to prevent dynamic linking.
+link_static_flag=$lt_lt_prog_compiler_static
+
+# Does compiler simultaneously support -c and -o options?
+compiler_c_o=$lt_lt_cv_prog_compiler_c_o
+
+# Whether or not to add -lc for building shared libraries.
+build_libtool_need_lc=$archive_cmds_need_lc
+
+# Whether or not to disallow shared libs when runtime libs are static.
+allow_libtool_libs_with_static_runtimes=$enable_shared_with_static_runtimes
+
+# Compiler flag to allow reflexive dlopens.
+export_dynamic_flag_spec=$lt_export_dynamic_flag_spec
+
+# Compiler flag to generate shared objects directly from archives.
+whole_archive_flag_spec=$lt_whole_archive_flag_spec
+
+# Whether the compiler copes with passing no objects directly.
+compiler_needs_object=$lt_compiler_needs_object
+
+# Create an old-style archive from a shared archive.
+old_archive_from_new_cmds=$lt_old_archive_from_new_cmds
+
+# Create a temporary old-style archive to link instead of a shared archive.
+old_archive_from_expsyms_cmds=$lt_old_archive_from_expsyms_cmds
+
+# Commands used to build a shared archive.
+archive_cmds=$lt_archive_cmds
+archive_expsym_cmds=$lt_archive_expsym_cmds
+
+# Commands used to build a loadable module if different from building
+# a shared archive.
+module_cmds=$lt_module_cmds
+module_expsym_cmds=$lt_module_expsym_cmds
+
+# Whether we are building with GNU ld or not.
+with_gnu_ld=$lt_with_gnu_ld
+
+# Flag that allows shared libraries with undefined symbols to be built.
+allow_undefined_flag=$lt_allow_undefined_flag
+
+# Flag that enforces no undefined symbols.
+no_undefined_flag=$lt_no_undefined_flag
+
+# Flag to hardcode \$libdir into a binary during linking.
+# This must work even if \$libdir does not exist
+hardcode_libdir_flag_spec=$lt_hardcode_libdir_flag_spec
+
+# If ld is used when linking, flag to hardcode \$libdir into a binary
+# during linking.  This must work even if \$libdir does not exist.
+hardcode_libdir_flag_spec_ld=$lt_hardcode_libdir_flag_spec_ld
+
+# Whether we need a single "-rpath" flag with a separated argument.
+hardcode_libdir_separator=$lt_hardcode_libdir_separator
+
+# Set to "yes" if using DIR/libNAME\${shared_ext} during linking hardcodes
+# DIR into the resulting binary.
+hardcode_direct=$hardcode_direct
+
+# Set to "yes" if using DIR/libNAME\${shared_ext} during linking hardcodes
+# DIR into the resulting binary and the resulting library dependency is
+# "absolute",i.e impossible to change by setting \${shlibpath_var} if the
+# library is relocated.
+hardcode_direct_absolute=$hardcode_direct_absolute
+
+# Set to "yes" if using the -LDIR flag during linking hardcodes DIR
+# into the resulting binary.
+hardcode_minus_L=$hardcode_minus_L
+
+# Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
+# into the resulting binary.
+hardcode_shlibpath_var=$hardcode_shlibpath_var
+
+# Set to "yes" if building a shared library automatically hardcodes DIR
+# into the library and all subsequent libraries and executables linked
+# against it.
+hardcode_automatic=$hardcode_automatic
+
+# Set to yes if linker adds runtime paths of dependent libraries
+# to runtime path list.
+inherit_rpath=$inherit_rpath
+
+# Whether libtool must link a program against all its dependency libraries.
+link_all_deplibs=$link_all_deplibs
+
+# Fix the shell variable \$srcfile for the compiler.
+fix_srcfile_path=$lt_fix_srcfile_path
+
+# Set to "yes" if exported symbols are required.
+always_export_symbols=$always_export_symbols
+
+# The commands to list exported symbols.
+export_symbols_cmds=$lt_export_symbols_cmds
+
+# Symbols that should not be listed in the preloaded symbols.
+exclude_expsyms=$lt_exclude_expsyms
+
+# Symbols that must always be exported.
+include_expsyms=$lt_include_expsyms
+
+# Commands necessary for linking programs (against libraries) with templates.
+prelink_cmds=$lt_prelink_cmds
+
+# Specify filename containing input files.
+file_list_spec=$lt_file_list_spec
+
+# How to hardcode a shared library path into an executable.
+hardcode_action=$hardcode_action
+
+# ### END LIBTOOL CONFIG
+
+_LT_EOF
+
+  case $host_os in
+  aix3*)
+    cat <<\_LT_EOF >> "$cfgfile"
+# AIX sometimes has problems with the GCC collect2 program.  For some
+# reason, if we set the COLLECT_NAMES environment variable, the problems
+# vanish in a puff of smoke.
+if test "X${COLLECT_NAMES+set}" != Xset; then
+  COLLECT_NAMES=
+  export COLLECT_NAMES
+fi
+_LT_EOF
+    ;;
+  esac
+
+
+ltmain="$ac_aux_dir/ltmain.sh"
+
+
+  # We use sed instead of cat because bash on DJGPP gets confused if
+  # if finds mixed CR/LF and LF-only lines.  Since sed operates in
+  # text mode, it properly converts lines to CR/LF.  This bash problem
+  # is reportedly fixed, but why not run on old versions too?
+  sed '/^# Generated shell functions inserted here/q' "$ltmain" >> "$cfgfile" \
+    || (rm -f "$cfgfile"; exit 1)
+
+  case $xsi_shell in
+  yes)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_dirname file append nondir_replacement
+# Compute the dirname of FILE.  If nonempty, add APPEND to the result,
+# otherwise set result to NONDIR_REPLACEMENT.
+func_dirname ()
+{
+  case ${1} in
+    */*) func_dirname_result="${1%/*}${2}" ;;
+    *  ) func_dirname_result="${3}" ;;
+  esac
+}
+
+# func_basename file
+func_basename ()
+{
+  func_basename_result="${1##*/}"
+}
+
+# func_dirname_and_basename file append nondir_replacement
+# perform func_basename and func_dirname in a single function
+# call:
+#   dirname:  Compute the dirname of FILE.  If nonempty,
+#             add APPEND to the result, otherwise set result
+#             to NONDIR_REPLACEMENT.
+#             value returned in "$func_dirname_result"
+#   basename: Compute filename of FILE.
+#             value retuned in "$func_basename_result"
+# Implementation must be kept synchronized with func_dirname
+# and func_basename. For efficiency, we do not delegate to
+# those functions but instead duplicate the functionality here.
+func_dirname_and_basename ()
+{
+  case ${1} in
+    */*) func_dirname_result="${1%/*}${2}" ;;
+    *  ) func_dirname_result="${3}" ;;
+  esac
+  func_basename_result="${1##*/}"
+}
+
+# func_stripname prefix suffix name
+# strip PREFIX and SUFFIX off of NAME.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+func_stripname ()
+{
+  # pdksh 5.2.14 does not do ${X%$Y} correctly if both X and Y are
+  # positional parameters, so assign one to ordinary parameter first.
+  func_stripname_result=${3}
+  func_stripname_result=${func_stripname_result#"${1}"}
+  func_stripname_result=${func_stripname_result%"${2}"}
+}
+
+# func_opt_split
+func_opt_split ()
+{
+  func_opt_split_opt=${1%%=*}
+  func_opt_split_arg=${1#*=}
+}
+
+# func_lo2o object
+func_lo2o ()
+{
+  case ${1} in
+    *.lo) func_lo2o_result=${1%.lo}.${objext} ;;
+    *)    func_lo2o_result=${1} ;;
+  esac
+}
+
+# func_xform libobj-or-source
+func_xform ()
+{
+  func_xform_result=${1%.*}.lo
+}
+
+# func_arith arithmetic-term...
+func_arith ()
+{
+  func_arith_result=$(( $* ))
+}
+
+# func_len string
+# STRING may not start with a hyphen.
+func_len ()
+{
+  func_len_result=${#1}
+}
+
+_LT_EOF
+    ;;
+  *) # Bourne compatible functions.
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_dirname file append nondir_replacement
+# Compute the dirname of FILE.  If nonempty, add APPEND to the result,
+# otherwise set result to NONDIR_REPLACEMENT.
+func_dirname ()
+{
+  # Extract subdirectory from the argument.
+  func_dirname_result=`$ECHO "X${1}" | $Xsed -e "$dirname"`
+  if test "X$func_dirname_result" = "X${1}"; then
+    func_dirname_result="${3}"
+  else
+    func_dirname_result="$func_dirname_result${2}"
+  fi
+}
+
+# func_basename file
+func_basename ()
+{
+  func_basename_result=`$ECHO "X${1}" | $Xsed -e "$basename"`
+}
+
+
+# func_stripname prefix suffix name
+# strip PREFIX and SUFFIX off of NAME.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+# func_strip_suffix prefix name
+func_stripname ()
+{
+  case ${2} in
+    .*) func_stripname_result=`$ECHO "X${3}" \
+           | $Xsed -e "s%^${1}%%" -e "s%\\\\${2}\$%%"`;;
+    *)  func_stripname_result=`$ECHO "X${3}" \
+           | $Xsed -e "s%^${1}%%" -e "s%${2}\$%%"`;;
+  esac
+}
+
+# sed scripts:
+my_sed_long_opt='1s/^\(-[^=]*\)=.*/\1/;q'
+my_sed_long_arg='1s/^-[^=]*=//'
+
+# func_opt_split
+func_opt_split ()
+{
+  func_opt_split_opt=`$ECHO "X${1}" | $Xsed -e "$my_sed_long_opt"`
+  func_opt_split_arg=`$ECHO "X${1}" | $Xsed -e "$my_sed_long_arg"`
+}
+
+# func_lo2o object
+func_lo2o ()
+{
+  func_lo2o_result=`$ECHO "X${1}" | $Xsed -e "$lo2o"`
+}
+
+# func_xform libobj-or-source
+func_xform ()
+{
+  func_xform_result=`$ECHO "X${1}" | $Xsed -e 's/\.[^.]*$/.lo/'`
+}
+
+# func_arith arithmetic-term...
+func_arith ()
+{
+  func_arith_result=`expr "$@"`
+}
+
+# func_len string
+# STRING may not start with a hyphen.
+func_len ()
+{
+  func_len_result=`expr "$1" : ".*" 2>/dev/null || echo $max_cmd_len`
+}
+
+_LT_EOF
+esac
+
+case $lt_shell_append in
+  yes)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_append var value
+# Append VALUE to the end of shell variable VAR.
+func_append ()
+{
+  eval "$1+=\$2"
+}
+_LT_EOF
+    ;;
+  *)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_append var value
+# Append VALUE to the end of shell variable VAR.
+func_append ()
+{
+  eval "$1=\$$1\$2"
+}
+
+_LT_EOF
+    ;;
+  esac
+
+
+  sed -n '/^# Generated shell functions inserted here/,$p' "$ltmain" >> "$cfgfile" \
+    || (rm -f "$cfgfile"; exit 1)
+
+  mv -f "$cfgfile" "$ofile" ||
+    (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile")
+  chmod +x "$ofile"
+
+ ;;
+
+  esac
+done # for ac_tag
+
+
+as_fn_exit 0
+_ACEOF
+ac_clean_files=$ac_clean_files_save
+
+test $ac_write_fail = 0 ||
+  as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || as_fn_exit 1
+fi
+if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+fi
+
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..b824a43
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,141 @@
+#                                               -*- Autoconf -*-
+
+AC_PREREQ([2.65])
+AC_INIT([knot], [0.8], [knot-dns@labs.nic.cz])
+AM_INIT_AUTOMAKE([gnu -Wall -Werror])
+AC_CONFIG_SRCDIR([src/knot/main.c])
+AC_CONFIG_HEADERS([src/config.h])
+AC_CONFIG_MACRO_DIR([m4])
+AC_USE_SYSTEM_EXTENSIONS([_GNU_SOURCE])
+AX_EXT
+
+# Enable maintainer mode by default for development
+AM_MAINTAINER_MODE([enable])
+
+# Initialize libtool
+LT_INIT
+
+# Checks for programs.
+AC_PROG_CC
+
+AC_CACHE_CHECK([for reentrant lex], [ac_cv_path_LEX],
+  [AC_PATH_PROGS_FEATURE_CHECK([LEX], [$LEX flex gflex],
+  [cat >conftest.l <<_ACEOF
+%{
+%}
+
+%option reentrant
+%option bison-bridge
+%option noinput
+%option nounput
+%option noreject
+
+BLANK [ \t\n]
+
+%%
+<<EOF>> return 0;
+%%
+_ACEOF
+_AC_DO_VAR(ac_path_LEX conftest.l)
+test $ac_status -eq 0 && ac_cv_path_LEX=$ac_path_LEX ac_path_LEX_found=true
+rm -f conftest.l lexyy.c lex.yy.c
+],
+[AC_MSG_ERROR([could not find lex that supports reentrant parsers])])])
+AC_SUBST([LEX], [$ac_cv_path_LEX])
+AM_PROG_LEX
+
+AC_PROG_YACC
+YACC_BISON=`bison --version | awk '{print $1;exit}'`
+if test "$YACC_BISON" != "bison"; then
+    AC_MSG_ERROR([GNU bison needed for reentrant parsers, set the \$YACC variable before running configure])
+fi
+AC_PROG_INSTALL
+
+# Set compiler compatibility flags
+AC_PROG_CPP_WERROR
+AC_PROG_CC_C99
+
+AC_ARG_ENABLE([ldns],
+     AC_HELP_STRING([--enable-ldns=yes|no], [Enable tests with ldns [default=no]]),
+     [case "${enableval}" in
+       yes) AC_SEARCH_LIBS([ldns_rr_list_pop_rrset], [ldns], [AC_DEFINE([HAVE_LDNS], [1], [ldns present])],
+       AC_MSG_ERROR([ldns not found])) ;;
+       no)  ldns=false ;;
+       *) AC_MSG_ERROR([bad value ${enableval} for --enable-ldns]) ;;
+     esac],[ldns=false])
+
+# Debug level
+AC_ARG_ENABLE([debug],
+    AS_HELP_STRING([--enable-debug=brief|verbose|details], [enable given debug level [default=disabled]]),
+    # Not all shells support fall-through with ;& so I have to duplicate
+    [case "x${enableval}" in
+      xdetails)
+        AC_DEFINE([DEBUG_ENABLE_DETAILS], [1], [Enable details debugging messages.])
+        AC_DEFINE([DEBUG_ENABLE_VERBOSE], [1], [Enable verbose debugging messages.])
+        AC_DEFINE([DEBUG_ENABLE_BRIEF], [1], [Enable brief debugging messages.])
+	;;
+      xverbose)
+        AC_DEFINE([DEBUG_ENABLE_VERBOSE], [1], [Enable verbose debugging messages.])
+        AC_DEFINE([DEBUG_ENABLE_BRIEF], [1], [Enable brief debugging messages.])
+	;;
+      xbrief)
+        AC_DEFINE([DEBUG_ENABLE_BRIEF], [1], [Enable brief debugging messages.])
+        ;;
+    esac], [])
+    
+# recvmmsg() (valgrind doesn't support it, so disable for debugging)
+AC_ARG_ENABLE([recvmmsg],
+    AS_HELP_STRING([--enable-recvmmsg=yes|no], [enable recvmmsg() network API under Linux (kernel support required) (set to 'no' if you have trouble running server under valgrind) [default=yes]]),
+    [case "${enableval}" in
+      yes)
+         AC_DEFINE([ENABLE_RECVMMSG], [1], [recvmmsg enabled])
+         ;;
+      no)
+         recvmmsg=false
+         ;;
+      *) 
+         AC_MSG_ERROR([bad value ${enableval} for --enable-recvmmsg])
+         ;;
+    esac], [
+    AC_DEFINE([ENABLE_RECVMMSG], [1], [recvmmsg enabled])
+    recvmmsg=true
+    ])
+
+# Checks for libraries.
+# FIXME: Replace `main' with a function in `-lm':
+# TODO: check if paths exist before appending
+CFLAGS="$CFLAGS -I/usr/local/include"
+LDFLAGS="$LDFLAGS -L/usr/local/lib"
+AC_SEARCH_LIBS([pow], [m])
+AC_SEARCH_LIBS([pthread_create], [pthread], [], [AC_MSG_ERROR([pthreads not found])])
+AC_SEARCH_LIBS([rcu_set_pointer_sym], [urcu], [], [AC_MSG_ERROR([liburcu not found])])
+AC_SEARCH_LIBS([dlopen], [dl])
+#AC_SEARCH_LIBS([clock_gettime], [rt], [], [AC_MSG_ERROR([librt not found])])
+AC_SEARCH_LIBS([OpenSSL_add_all_digests], [crypto],[], [AC_MSG_ERROR([libcrypto not found])])
+#AC_SEARCH_LIBS([ldns_rr_list_pop_rrset], [ldns], [], [AC_MSG_ERROR([libldns not found])])
+
+# Checks for header files.
+AC_HEADER_RESOLV
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h inttypes.h limits.h malloc.h netdb.h netinet/in.h stdint.h stdlib.h string.h strings.h sys/socket.h sys/time.h syslog.h unistd.h urcu.h ev.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_HEADER_STDBOOL
+AC_C_INLINE
+AC_TYPE_INT64_T
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_UINT8_T
+
+# Checks for library functions.
+AC_FUNC_FORK
+AC_FUNC_MMAP
+AC_CHECK_FUNCS([gethostbyname gettimeofday memmove memset munmap regcomp select socket sqrt strcasecmp strchr strdup strerror strncasecmp strtol strtoul poll epoll_wait kqueue])
+
+AC_CONFIG_FILES([Makefile
+		 samples/Makefile
+                 src/Makefile])
+AC_OUTPUT
diff --git a/depcomp b/depcomp
new file mode 100755
index 0000000..df8eea7
--- /dev/null
+++ b/depcomp
@@ -0,0 +1,630 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2009-04-28.21; # UTC
+
+# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009 Free
+# Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+     echo "$0: No command.  Try \`$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by `PROGRAMS ARGS'.
+  object      Object file output by `PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputing dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+   # This is just like dashmstdout with a different argument.
+   dashmflag=-xM
+   depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+   # This is just like msvisualcpp but w/o cygpath translation.
+   # Just convert the backslash-escaped backslashes to single forward
+   # slashes to satisfy depend.m4
+   cygpath_u="sed s,\\\\\\\\,/,g"
+   depmode=msvisualcpp
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
+## The second -e expression handles DOS-style file names with drive letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the `deleted header file' problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+  tr ' ' '
+' < "$tmpdepfile" |
+## Some versions of gcc put a space before the `:'.  On the theory
+## that the space means something, we add a space to the output as
+## well.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like `#:fec' to the end of the
+    # dependency line.
+    tr ' ' '
+' < "$tmpdepfile" \
+    | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \
+    tr '
+' ' ' >> "$depfile"
+    echo >> "$depfile"
+
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' '
+' < "$tmpdepfile" \
+   | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+   >> "$depfile"
+  else
+    # The sourcefile does not contain any dependencies, so just
+    # store a dummy comment line, to avoid errors with the Makefile
+    # "include basename.Plo" scheme.
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts `$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form `foo.o: dependent.h'.
+    # Do two passes, one to just change these to
+    # `$object: dependent.h' and one to simply `dependent.h:'.
+    sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+    # That's a tab and a space in the [].
+    sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+  else
+    # The sourcefile does not contain any dependencies, so just
+    # store a dummy comment line, to avoid errors with the Makefile
+    # "include basename.Plo" scheme.
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+icc)
+  # Intel's C compiler understands `-MD -MF file'.  However on
+  #    icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c
+  # ICC 7.0 will fill foo.d with something like
+  #    foo.o: sub/foo.c
+  #    foo.o: sub/foo.h
+  # which is wrong.  We want:
+  #    sub/foo.o: sub/foo.c
+  #    sub/foo.o: sub/foo.h
+  #    sub/foo.c:
+  #    sub/foo.h:
+  # ICC 7.1 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using \ :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
+    sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add `dependent.h:' lines.
+    sed -ne '2,${
+	       s/^ *//
+	       s/ \\*$//
+	       s/$/:/
+	       p
+	     }' "$tmpdepfile" >> "$depfile"
+  else
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+   # The Tru64 compiler uses -MD to generate dependencies as a side
+   # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.
+   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+   # dependencies in `foo.d' instead, so we check for that too.
+   # Subdirectories are respected.
+   dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+   test "x$dir" = "x$object" && dir=
+   base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+
+   if test "$libtool" = yes; then
+      # With Tru64 cc, shared objects can also be used to make a
+      # static library.  This mechanism is used in libtool 1.4 series to
+      # handle both shared and static libraries in a single compilation.
+      # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
+      #
+      # With libtool 1.5 this exception was removed, and libtool now
+      # generates 2 separate objects for the 2 libraries.  These two
+      # compilations output dependencies in $dir.libs/$base.o.d and
+      # in $dir$base.o.d.  We have to check for both files, because
+      # one of the two compilations can be disabled.  We should prefer
+      # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+      # automatically cleaned when .libs/ is deleted, while ignoring
+      # the former would cause a distcleancheck panic.
+      tmpdepfile1=$dir.libs/$base.lo.d   # libtool 1.4
+      tmpdepfile2=$dir$base.o.d          # libtool 1.5
+      tmpdepfile3=$dir.libs/$base.o.d    # libtool 1.5
+      tmpdepfile4=$dir.libs/$base.d      # Compaq CCC V6.2-504
+      "$@" -Wc,-MD
+   else
+      tmpdepfile1=$dir$base.o.d
+      tmpdepfile2=$dir$base.d
+      tmpdepfile3=$dir$base.d
+      tmpdepfile4=$dir$base.d
+      "$@" -MD
+   fi
+
+   stat=$?
+   if test $stat -eq 0; then :
+   else
+      rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+      exit $stat
+   fi
+
+   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+   do
+     test -f "$tmpdepfile" && break
+   done
+   if test -f "$tmpdepfile"; then
+      sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+      # That's a tab and a space in the [].
+      sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+   else
+      echo "#dummy" > "$depfile"
+   fi
+   rm -f "$tmpdepfile"
+   ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove `-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for `:'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise.
+  "$@" $dashmflag |
+    sed 's:^[  ]*[^: ][^:][^:]*\:[    ]*:'"$object"'\: :' > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  tr ' ' '
+' < "$tmpdepfile" | \
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  sed '1,2d' "$tmpdepfile" | tr ' ' '
+' | \
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove `-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E |
+    sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+       -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
+    sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+	set fnord "$@"
+	shift
+	shift
+	;;
+    *)
+	set fnord "$@" "$arg"
+	shift
+	shift
+	;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::	\1 \\:p' >> "$depfile"
+  echo "	" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/install-sh b/install-sh
new file mode 100755
index 0000000..6781b98
--- /dev/null
+++ b/install-sh
@@ -0,0 +1,520 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2009-04-28.21; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+nl='
+'
+IFS=" ""	$nl"
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit=${DOITPROG-}
+if test -z "$doit"; then
+  doit_exec=exec
+else
+  doit_exec=$doit
+fi
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_glob='?'
+initialize_posix_glob='
+  test "$posix_glob" != "?" || {
+    if (set -f) 2>/dev/null; then
+      posix_glob=
+    else
+      posix_glob=:
+    fi
+  }
+'
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+no_target_directory=
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+	shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+	case $mode in
+	  *' '* | *'	'* | *'
+'*	  | *'*'* | *'?'* | *'['*)
+	    echo "$0: invalid mode: $mode" >&2
+	    exit 1;;
+	esac
+	shift;;
+
+    -o) chowncmd="$chownprog $2"
+	shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t) dst_arg=$2
+	shift;;
+
+    -T) no_target_directory=true;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --)	shift
+	break;;
+
+    -*)	echo "$0: invalid option: $1" >&2
+	exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call `install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  trap '(exit $?); exit' 1 2 13 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names starting with `-'.
+  case $src in
+    -*) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+
+    dst=$dst_arg
+    # Protect names starting with `-'.
+    case $dst in
+      -*) dst=./$dst;;
+    esac
+
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test -n "$no_target_directory"; then
+	echo "$0: $dst_arg: Is a directory" >&2
+	exit 1
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      # Prefer dirname, but fall back on a substitute if dirname fails.
+      dstdir=`
+	(dirname "$dst") 2>/dev/null ||
+	expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	     X"$dst" : 'X\(//\)[^/]' \| \
+	     X"$dst" : 'X\(//\)$' \| \
+	     X"$dst" : 'X\(/\)' \| . 2>/dev/null ||
+	echo X"$dst" |
+	    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)[^/].*/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\).*/{
+		   s//\1/
+		   q
+		 }
+		 s/.*/./; q'
+      `
+
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+	# Create intermediate dirs using mode 755 as modified by the umask.
+	# This is like FreeBSD 'install' as of 1997-10-28.
+	umask=`umask`
+	case $stripcmd.$umask in
+	  # Optimize common cases.
+	  *[2367][2367]) mkdir_umask=$umask;;
+	  .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+	  *[0-7])
+	    mkdir_umask=`expr $umask + 22 \
+	      - $umask % 100 % 40 + $umask % 20 \
+	      - $umask % 10 % 4 + $umask % 2
+	    `;;
+	  *) mkdir_umask=$umask,go-w;;
+	esac
+
+	# With -d, create the new directory with the user-specified mode.
+	# Otherwise, rely on $mkdir_umask.
+	if test -n "$dir_arg"; then
+	  mkdir_mode=-m$mode
+	else
+	  mkdir_mode=
+	fi
+
+	posix_mkdir=false
+	case $umask in
+	  *[123567][0-7][0-7])
+	    # POSIX mkdir -p sets u+wx bits regardless of umask, which
+	    # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+	    ;;
+	  *)
+	    tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+	    trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+	    if (umask $mkdir_umask &&
+		exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
+	    then
+	      if test -z "$dir_arg" || {
+		   # Check for POSIX incompatibilities with -m.
+		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+		   # other-writeable bit of parent directory when it shouldn't.
+		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
+		   case $ls_ld_tmpdir in
+		     d????-?r-*) different_mode=700;;
+		     d????-?--*) different_mode=755;;
+		     *) false;;
+		   esac &&
+		   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
+		     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
+		     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+		   }
+		 }
+	      then posix_mkdir=:
+	      fi
+	      rmdir "$tmpdir/d" "$tmpdir"
+	    else
+	      # Remove any dirs left behind by ancient mkdir implementations.
+	      rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
+	    fi
+	    trap '' 0;;
+	esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+	umask $mkdir_umask &&
+	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+	/*) prefix='/';;
+	-*) prefix='./';;
+	*)  prefix='';;
+      esac
+
+      eval "$initialize_posix_glob"
+
+      oIFS=$IFS
+      IFS=/
+      $posix_glob set -f
+      set fnord $dstdir
+      shift
+      $posix_glob set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+	test -z "$d" && continue
+
+	prefix=$prefix$d
+	if test -d "$prefix"; then
+	  prefixes=
+	else
+	  if $posix_mkdir; then
+	    (umask=$mkdir_umask &&
+	     $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+	    # Don't fail if two instances are running concurrently.
+	    test -d "$prefix" || exit 1
+	  else
+	    case $prefix in
+	      *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+	      *) qprefix=$prefix;;
+	    esac
+	    prefixes="$prefixes '$qprefix'"
+	  fi
+	fi
+	prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+	# Don't fail if two instances are running concurrently.
+	(umask $mkdir_umask &&
+	 eval "\$doit_exec \$mkdirprog $prefixes") ||
+	  test -d "$dstdir" || exit 1
+	obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
+
+       eval "$initialize_posix_glob" &&
+       $posix_glob set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       $posix_glob set +f &&
+
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+	# Now remove or move aside any old file at destination location.
+	# We try this two ways since rm can't unlink itself on some
+	# systems and the destination file might be busy for other
+	# reasons.  In this case, the final cleanup might fail but the new
+	# file should still install successfully.
+	{
+	  test ! -f "$dst" ||
+	  $doit $rmcmd -f "$dst" 2>/dev/null ||
+	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+	  } ||
+	  { echo "$0: cannot unlink or rename $dst" >&2
+	    (exit 1); exit 1
+	  }
+	} &&
+
+	# Now rename the file to the real destination.
+	$doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/knot.sample.conf.in b/knot.sample.conf.in
new file mode 100644
index 0000000..db5c587
--- /dev/null
+++ b/knot.sample.conf.in
@@ -0,0 +1,18 @@
+system {
+  identity "@package@ @version@";
+  storage "@localstatedir@/@package@";
+}
+
+interfaces {
+  ipv4 { address 127.0.0.1@53; }
+}
+
+zones {
+  example.com {
+    file "@sysconfdir@/example.com.zone";
+  }
+}
+
+log {
+  syslog { any warning, error, notice; }
+}
diff --git a/ltmain.sh b/ltmain.sh
new file mode 100755
index 0000000..d88da2c
--- /dev/null
+++ b/ltmain.sh
@@ -0,0 +1,8413 @@
+# Generated from ltmain.m4sh.
+
+# ltmain.sh (GNU libtool) 2.2.6b
+# Written by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
+
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007 2008 Free Software Foundation, Inc.
+# This is free software; see the source for copying conditions.  There is NO
+# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+# GNU Libtool is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# As a special exception to the GNU General Public License,
+# if you distribute this file as part of a program or library that
+# is built using GNU Libtool, you may include this file under the
+# same distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Libtool; see the file COPYING.  If not, a copy
+# can be downloaded from http://www.gnu.org/licenses/gpl.html,
+# or obtained by writing to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# Usage: $progname [OPTION]... [MODE-ARG]...
+#
+# Provide generalized library-building support services.
+#
+#     --config             show all configuration variables
+#     --debug              enable verbose shell tracing
+# -n, --dry-run            display commands without modifying any files
+#     --features           display basic configuration information and exit
+#     --mode=MODE          use operation mode MODE
+#     --preserve-dup-deps  don't remove duplicate dependency libraries
+#     --quiet, --silent    don't print informational messages
+#     --tag=TAG            use configuration variables from tag TAG
+# -v, --verbose            print informational messages (default)
+#     --version            print version information
+# -h, --help               print short or long help message
+#
+# MODE must be one of the following:
+#
+#       clean              remove files from the build directory
+#       compile            compile a source file into a libtool object
+#       execute            automatically set library path, then run a program
+#       finish             complete the installation of libtool libraries
+#       install            install libraries or executables
+#       link               create a library or an executable
+#       uninstall          remove libraries from an installed directory
+#
+# MODE-ARGS vary depending on the MODE.
+# Try `$progname --help --mode=MODE' for a more detailed description of MODE.
+#
+# When reporting a bug, please describe a test case to reproduce it and
+# include the following information:
+#
+#       host-triplet:	$host
+#       shell:		$SHELL
+#       compiler:		$LTCC
+#       compiler flags:		$LTCFLAGS
+#       linker:		$LD (gnu? $with_gnu_ld)
+#       $progname:		(GNU libtool) 2.2.6b Debian-2.2.6b-2
+#       automake:		$automake_version
+#       autoconf:		$autoconf_version
+#
+# Report bugs to <bug-libtool@gnu.org>.
+
+PROGRAM=ltmain.sh
+PACKAGE=libtool
+VERSION="2.2.6b Debian-2.2.6b-2"
+TIMESTAMP=""
+package_revision=1.3017
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# NLS nuisances: We save the old values to restore during execute mode.
+# Only set LANG and LC_ALL to C if already set.
+# These must not be set unconditionally because not all systems understand
+# e.g. LANG=C (notably SCO).
+lt_user_locale=
+lt_safe_locale=
+for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
+do
+  eval "if test \"\${$lt_var+set}\" = set; then
+          save_$lt_var=\$$lt_var
+          $lt_var=C
+	  export $lt_var
+	  lt_user_locale=\"$lt_var=\\\$save_\$lt_var; \$lt_user_locale\"
+	  lt_safe_locale=\"$lt_var=C; \$lt_safe_locale\"
+	fi"
+done
+
+$lt_unset CDPATH
+
+
+
+
+
+: ${CP="cp -f"}
+: ${ECHO="echo"}
+: ${EGREP="/bin/grep -E"}
+: ${FGREP="/bin/grep -F"}
+: ${GREP="/bin/grep"}
+: ${LN_S="ln -s"}
+: ${MAKE="make"}
+: ${MKDIR="mkdir"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+: ${SED="/bin/sed"}
+: ${SHELL="${CONFIG_SHELL-/bin/sh}"}
+: ${Xsed="$SED -e 1s/^X//"}
+
+# Global variables:
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+EXIT_MISMATCH=63  # $? = 63 is used to indicate version mismatch to missing.
+EXIT_SKIP=77	  # $? = 77 is used to indicate a skipped test to automake.
+
+exit_status=$EXIT_SUCCESS
+
+# Make sure IFS has a sensible default
+lt_nl='
+'
+IFS=" 	$lt_nl"
+
+dirname="s,/[^/]*$,,"
+basename="s,^.*/,,"
+
+# func_dirname_and_basename file append nondir_replacement
+# perform func_basename and func_dirname in a single function
+# call:
+#   dirname:  Compute the dirname of FILE.  If nonempty,
+#             add APPEND to the result, otherwise set result
+#             to NONDIR_REPLACEMENT.
+#             value returned in "$func_dirname_result"
+#   basename: Compute filename of FILE.
+#             value retuned in "$func_basename_result"
+# Implementation must be kept synchronized with func_dirname
+# and func_basename. For efficiency, we do not delegate to
+# those functions but instead duplicate the functionality here.
+func_dirname_and_basename ()
+{
+  # Extract subdirectory from the argument.
+  func_dirname_result=`$ECHO "X${1}" | $Xsed -e "$dirname"`
+  if test "X$func_dirname_result" = "X${1}"; then
+    func_dirname_result="${3}"
+  else
+    func_dirname_result="$func_dirname_result${2}"
+  fi
+  func_basename_result=`$ECHO "X${1}" | $Xsed -e "$basename"`
+}
+
+# Generated shell functions inserted here.
+
+# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh
+# is ksh but when the shell is invoked as "sh" and the current value of
+# the _XPG environment variable is not equal to 1 (one), the special
+# positional parameter $0, within a function call, is the name of the
+# function.
+progpath="$0"
+
+# The name of this program:
+# In the unlikely event $progname began with a '-', it would play havoc with
+# func_echo (imagine progname=-n), so we prepend ./ in that case:
+func_dirname_and_basename "$progpath"
+progname=$func_basename_result
+case $progname in
+  -*) progname=./$progname ;;
+esac
+
+# Make sure we have an absolute path for reexecution:
+case $progpath in
+  [\\/]*|[A-Za-z]:\\*) ;;
+  *[\\/]*)
+     progdir=$func_dirname_result
+     progdir=`cd "$progdir" && pwd`
+     progpath="$progdir/$progname"
+     ;;
+  *)
+     save_IFS="$IFS"
+     IFS=:
+     for progdir in $PATH; do
+       IFS="$save_IFS"
+       test -x "$progdir/$progname" && break
+     done
+     IFS="$save_IFS"
+     test -n "$progdir" || progdir=`pwd`
+     progpath="$progdir/$progname"
+     ;;
+esac
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+Xsed="${SED}"' -e 1s/^X//'
+sed_quote_subst='s/\([`"$\\]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\(["`\\]\)/\\\1/g'
+
+# Re-`\' parameter expansions in output of double_quote_subst that were
+# `\'-ed in input to the same.  If an odd number of `\' preceded a '$'
+# in input to double_quote_subst, that '$' was protected from expansion.
+# Since each input `\' is now two `\'s, look for any number of runs of
+# four `\'s followed by two `\'s and then a '$'.  `\' that '$'.
+bs='\\'
+bs2='\\\\'
+bs4='\\\\\\\\'
+dollar='\$'
+sed_double_backslash="\
+  s/$bs4/&\\
+/g
+  s/^$bs2$dollar/$bs&/
+  s/\\([^$bs]\\)$bs2$dollar/\\1$bs2$bs$dollar/g
+  s/\n//g"
+
+# Standard options:
+opt_dry_run=false
+opt_help=false
+opt_quiet=false
+opt_verbose=false
+opt_warning=:
+
+# func_echo arg...
+# Echo program name prefixed message, along with the current mode
+# name if it has been set yet.
+func_echo ()
+{
+    $ECHO "$progname${mode+: }$mode: $*"
+}
+
+# func_verbose arg...
+# Echo program name prefixed message in verbose mode only.
+func_verbose ()
+{
+    $opt_verbose && func_echo ${1+"$@"}
+
+    # A bug in bash halts the script if the last line of a function
+    # fails when set -e is in force, so we need another command to
+    # work around that:
+    :
+}
+
+# func_error arg...
+# Echo program name prefixed message to standard error.
+func_error ()
+{
+    $ECHO "$progname${mode+: }$mode: "${1+"$@"} 1>&2
+}
+
+# func_warning arg...
+# Echo program name prefixed warning message to standard error.
+func_warning ()
+{
+    $opt_warning && $ECHO "$progname${mode+: }$mode: warning: "${1+"$@"} 1>&2
+
+    # bash bug again:
+    :
+}
+
+# func_fatal_error arg...
+# Echo program name prefixed message to standard error, and exit.
+func_fatal_error ()
+{
+    func_error ${1+"$@"}
+    exit $EXIT_FAILURE
+}
+
+# func_fatal_help arg...
+# Echo program name prefixed message to standard error, followed by
+# a help hint, and exit.
+func_fatal_help ()
+{
+    func_error ${1+"$@"}
+    func_fatal_error "$help"
+}
+help="Try \`$progname --help' for more information."  ## default
+
+
+# func_grep expression filename
+# Check whether EXPRESSION matches any line of FILENAME, without output.
+func_grep ()
+{
+    $GREP "$1" "$2" >/dev/null 2>&1
+}
+
+
+# func_mkdir_p directory-path
+# Make sure the entire path to DIRECTORY-PATH is available.
+func_mkdir_p ()
+{
+    my_directory_path="$1"
+    my_dir_list=
+
+    if test -n "$my_directory_path" && test "$opt_dry_run" != ":"; then
+
+      # Protect directory names starting with `-'
+      case $my_directory_path in
+        -*) my_directory_path="./$my_directory_path" ;;
+      esac
+
+      # While some portion of DIR does not yet exist...
+      while test ! -d "$my_directory_path"; do
+        # ...make a list in topmost first order.  Use a colon delimited
+	# list incase some portion of path contains whitespace.
+        my_dir_list="$my_directory_path:$my_dir_list"
+
+        # If the last portion added has no slash in it, the list is done
+        case $my_directory_path in */*) ;; *) break ;; esac
+
+        # ...otherwise throw away the child directory and loop
+        my_directory_path=`$ECHO "X$my_directory_path" | $Xsed -e "$dirname"`
+      done
+      my_dir_list=`$ECHO "X$my_dir_list" | $Xsed -e 's,:*$,,'`
+
+      save_mkdir_p_IFS="$IFS"; IFS=':'
+      for my_dir in $my_dir_list; do
+	IFS="$save_mkdir_p_IFS"
+        # mkdir can fail with a `File exist' error if two processes
+        # try to create one of the directories concurrently.  Don't
+        # stop in that case!
+        $MKDIR "$my_dir" 2>/dev/null || :
+      done
+      IFS="$save_mkdir_p_IFS"
+
+      # Bail out if we (or some other process) failed to create a directory.
+      test -d "$my_directory_path" || \
+        func_fatal_error "Failed to create \`$1'"
+    fi
+}
+
+
+# func_mktempdir [string]
+# Make a temporary directory that won't clash with other running
+# libtool processes, and avoids race conditions if possible.  If
+# given, STRING is the basename for that directory.
+func_mktempdir ()
+{
+    my_template="${TMPDIR-/tmp}/${1-$progname}"
+
+    if test "$opt_dry_run" = ":"; then
+      # Return a directory name, but don't create it in dry-run mode
+      my_tmpdir="${my_template}-$$"
+    else
+
+      # If mktemp works, use that first and foremost
+      my_tmpdir=`mktemp -d "${my_template}-XXXXXXXX" 2>/dev/null`
+
+      if test ! -d "$my_tmpdir"; then
+        # Failing that, at least try and use $RANDOM to avoid a race
+        my_tmpdir="${my_template}-${RANDOM-0}$$"
+
+        save_mktempdir_umask=`umask`
+        umask 0077
+        $MKDIR "$my_tmpdir"
+        umask $save_mktempdir_umask
+      fi
+
+      # If we're not in dry-run mode, bomb out on failure
+      test -d "$my_tmpdir" || \
+        func_fatal_error "cannot create temporary directory \`$my_tmpdir'"
+    fi
+
+    $ECHO "X$my_tmpdir" | $Xsed
+}
+
+
+# func_quote_for_eval arg
+# Aesthetically quote ARG to be evaled later.
+# This function returns two values: FUNC_QUOTE_FOR_EVAL_RESULT
+# is double-quoted, suitable for a subsequent eval, whereas
+# FUNC_QUOTE_FOR_EVAL_UNQUOTED_RESULT has merely all characters
+# which are still active within double quotes backslashified.
+func_quote_for_eval ()
+{
+    case $1 in
+      *[\\\`\"\$]*)
+	func_quote_for_eval_unquoted_result=`$ECHO "X$1" | $Xsed -e "$sed_quote_subst"` ;;
+      *)
+        func_quote_for_eval_unquoted_result="$1" ;;
+    esac
+
+    case $func_quote_for_eval_unquoted_result in
+      # Double-quote args containing shell metacharacters to delay
+      # word splitting, command substitution and and variable
+      # expansion for a subsequent eval.
+      # Many Bourne shells cannot handle close brackets correctly
+      # in scan sets, so we specify it separately.
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+        func_quote_for_eval_result="\"$func_quote_for_eval_unquoted_result\""
+        ;;
+      *)
+        func_quote_for_eval_result="$func_quote_for_eval_unquoted_result"
+    esac
+}
+
+
+# func_quote_for_expand arg
+# Aesthetically quote ARG to be evaled later; same as above,
+# but do not quote variable references.
+func_quote_for_expand ()
+{
+    case $1 in
+      *[\\\`\"]*)
+	my_arg=`$ECHO "X$1" | $Xsed \
+	    -e "$double_quote_subst" -e "$sed_double_backslash"` ;;
+      *)
+        my_arg="$1" ;;
+    esac
+
+    case $my_arg in
+      # Double-quote args containing shell metacharacters to delay
+      # word splitting and command substitution for a subsequent eval.
+      # Many Bourne shells cannot handle close brackets correctly
+      # in scan sets, so we specify it separately.
+      *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \	]*|*]*|"")
+        my_arg="\"$my_arg\""
+        ;;
+    esac
+
+    func_quote_for_expand_result="$my_arg"
+}
+
+
+# func_show_eval cmd [fail_exp]
+# Unless opt_silent is true, then output CMD.  Then, if opt_dryrun is
+# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
+# is given, then evaluate it.
+func_show_eval ()
+{
+    my_cmd="$1"
+    my_fail_exp="${2-:}"
+
+    ${opt_silent-false} || {
+      func_quote_for_expand "$my_cmd"
+      eval "func_echo $func_quote_for_expand_result"
+    }
+
+    if ${opt_dry_run-false}; then :; else
+      eval "$my_cmd"
+      my_status=$?
+      if test "$my_status" -eq 0; then :; else
+	eval "(exit $my_status); $my_fail_exp"
+      fi
+    fi
+}
+
+
+# func_show_eval_locale cmd [fail_exp]
+# Unless opt_silent is true, then output CMD.  Then, if opt_dryrun is
+# not true, evaluate CMD.  If the evaluation of CMD fails, and FAIL_EXP
+# is given, then evaluate it.  Use the saved locale for evaluation.
+func_show_eval_locale ()
+{
+    my_cmd="$1"
+    my_fail_exp="${2-:}"
+
+    ${opt_silent-false} || {
+      func_quote_for_expand "$my_cmd"
+      eval "func_echo $func_quote_for_expand_result"
+    }
+
+    if ${opt_dry_run-false}; then :; else
+      eval "$lt_user_locale
+	    $my_cmd"
+      my_status=$?
+      eval "$lt_safe_locale"
+      if test "$my_status" -eq 0; then :; else
+	eval "(exit $my_status); $my_fail_exp"
+      fi
+    fi
+}
+
+
+
+
+
+# func_version
+# Echo version message to standard output and exit.
+func_version ()
+{
+    $SED -n '/^# '$PROGRAM' (GNU /,/# warranty; / {
+        s/^# //
+	s/^# *$//
+        s/\((C)\)[ 0-9,-]*\( [1-9][0-9]*\)/\1\2/
+        p
+     }' < "$progpath"
+     exit $?
+}
+
+# func_usage
+# Echo short help message to standard output and exit.
+func_usage ()
+{
+    $SED -n '/^# Usage:/,/# -h/ {
+        s/^# //
+	s/^# *$//
+	s/\$progname/'$progname'/
+	p
+    }' < "$progpath"
+    $ECHO
+    $ECHO "run \`$progname --help | more' for full usage"
+    exit $?
+}
+
+# func_help
+# Echo long help message to standard output and exit.
+func_help ()
+{
+    $SED -n '/^# Usage:/,/# Report bugs to/ {
+        s/^# //
+	s/^# *$//
+	s*\$progname*'$progname'*
+	s*\$host*'"$host"'*
+	s*\$SHELL*'"$SHELL"'*
+	s*\$LTCC*'"$LTCC"'*
+	s*\$LTCFLAGS*'"$LTCFLAGS"'*
+	s*\$LD*'"$LD"'*
+	s/\$with_gnu_ld/'"$with_gnu_ld"'/
+	s/\$automake_version/'"`(automake --version) 2>/dev/null |$SED 1q`"'/
+	s/\$autoconf_version/'"`(autoconf --version) 2>/dev/null |$SED 1q`"'/
+	p
+     }' < "$progpath"
+    exit $?
+}
+
+# func_missing_arg argname
+# Echo program name prefixed message to standard error and set global
+# exit_cmd.
+func_missing_arg ()
+{
+    func_error "missing argument for $1"
+    exit_cmd=exit
+}
+
+exit_cmd=:
+
+
+
+
+
+# Check that we have a working $ECHO.
+if test "X$1" = X--no-reexec; then
+  # Discard the --no-reexec flag, and continue.
+  shift
+elif test "X$1" = X--fallback-echo; then
+  # Avoid inline document here, it may be left over
+  :
+elif test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t'; then
+  # Yippee, $ECHO works!
+  :
+else
+  # Restart under the correct shell, and then maybe $ECHO will work.
+  exec $SHELL "$progpath" --no-reexec ${1+"$@"}
+fi
+
+if test "X$1" = X--fallback-echo; then
+  # used as fallback echo
+  shift
+  cat <<EOF
+$*
+EOF
+  exit $EXIT_SUCCESS
+fi
+
+magic="%%%MAGIC variable%%%"
+magic_exe="%%%MAGIC EXE variable%%%"
+
+# Global variables.
+# $mode is unset
+nonopt=
+execute_dlfiles=
+preserve_args=
+lo2o="s/\\.lo\$/.${objext}/"
+o2lo="s/\\.${objext}\$/.lo/"
+extracted_archives=
+extracted_serial=0
+
+opt_dry_run=false
+opt_duplicate_deps=false
+opt_silent=false
+opt_debug=:
+
+# If this variable is set in any of the actions, the command in it
+# will be execed at the end.  This prevents here-documents from being
+# left over by shells.
+exec_cmd=
+
+# func_fatal_configuration arg...
+# Echo program name prefixed message to standard error, followed by
+# a configuration failure hint, and exit.
+func_fatal_configuration ()
+{
+    func_error ${1+"$@"}
+    func_error "See the $PACKAGE documentation for more information."
+    func_fatal_error "Fatal configuration error."
+}
+
+
+# func_config
+# Display the configuration for all the tags in this script.
+func_config ()
+{
+    re_begincf='^# ### BEGIN LIBTOOL'
+    re_endcf='^# ### END LIBTOOL'
+
+    # Default configuration.
+    $SED "1,/$re_begincf CONFIG/d;/$re_endcf CONFIG/,\$d" < "$progpath"
+
+    # Now print the configurations for the tags.
+    for tagname in $taglist; do
+      $SED -n "/$re_begincf TAG CONFIG: $tagname\$/,/$re_endcf TAG CONFIG: $tagname\$/p" < "$progpath"
+    done
+
+    exit $?
+}
+
+# func_features
+# Display the features supported by this script.
+func_features ()
+{
+    $ECHO "host: $host"
+    if test "$build_libtool_libs" = yes; then
+      $ECHO "enable shared libraries"
+    else
+      $ECHO "disable shared libraries"
+    fi
+    if test "$build_old_libs" = yes; then
+      $ECHO "enable static libraries"
+    else
+      $ECHO "disable static libraries"
+    fi
+
+    exit $?
+}
+
+# func_enable_tag tagname
+# Verify that TAGNAME is valid, and either flag an error and exit, or
+# enable the TAGNAME tag.  We also add TAGNAME to the global $taglist
+# variable here.
+func_enable_tag ()
+{
+  # Global variable:
+  tagname="$1"
+
+  re_begincf="^# ### BEGIN LIBTOOL TAG CONFIG: $tagname\$"
+  re_endcf="^# ### END LIBTOOL TAG CONFIG: $tagname\$"
+  sed_extractcf="/$re_begincf/,/$re_endcf/p"
+
+  # Validate tagname.
+  case $tagname in
+    *[!-_A-Za-z0-9,/]*)
+      func_fatal_error "invalid tag name: $tagname"
+      ;;
+  esac
+
+  # Don't test for the "default" C tag, as we know it's
+  # there but not specially marked.
+  case $tagname in
+    CC) ;;
+    *)
+      if $GREP "$re_begincf" "$progpath" >/dev/null 2>&1; then
+	taglist="$taglist $tagname"
+
+	# Evaluate the configuration.  Be careful to quote the path
+	# and the sed script, to avoid splitting on whitespace, but
+	# also don't use non-portable quotes within backquotes within
+	# quotes we have to do it in 2 steps:
+	extractedcf=`$SED -n -e "$sed_extractcf" < "$progpath"`
+	eval "$extractedcf"
+      else
+	func_error "ignoring unknown tag $tagname"
+      fi
+      ;;
+  esac
+}
+
+# Parse options once, thoroughly.  This comes as soon as possible in
+# the script to make things like `libtool --version' happen quickly.
+{
+
+  # Shorthand for --mode=foo, only valid as the first argument
+  case $1 in
+  clean|clea|cle|cl)
+    shift; set dummy --mode clean ${1+"$@"}; shift
+    ;;
+  compile|compil|compi|comp|com|co|c)
+    shift; set dummy --mode compile ${1+"$@"}; shift
+    ;;
+  execute|execut|execu|exec|exe|ex|e)
+    shift; set dummy --mode execute ${1+"$@"}; shift
+    ;;
+  finish|finis|fini|fin|fi|f)
+    shift; set dummy --mode finish ${1+"$@"}; shift
+    ;;
+  install|instal|insta|inst|ins|in|i)
+    shift; set dummy --mode install ${1+"$@"}; shift
+    ;;
+  link|lin|li|l)
+    shift; set dummy --mode link ${1+"$@"}; shift
+    ;;
+  uninstall|uninstal|uninsta|uninst|unins|unin|uni|un|u)
+    shift; set dummy --mode uninstall ${1+"$@"}; shift
+    ;;
+  esac
+
+  # Parse non-mode specific arguments:
+  while test "$#" -gt 0; do
+    opt="$1"
+    shift
+
+    case $opt in
+      --config)		func_config					;;
+
+      --debug)		preserve_args="$preserve_args $opt"
+			func_echo "enabling shell trace mode"
+			opt_debug='set -x'
+			$opt_debug
+			;;
+
+      -dlopen)		test "$#" -eq 0 && func_missing_arg "$opt" && break
+			execute_dlfiles="$execute_dlfiles $1"
+			shift
+			;;
+
+      --dry-run | -n)	opt_dry_run=:					;;
+      --features)       func_features					;;
+      --finish)		mode="finish"					;;
+
+      --mode)		test "$#" -eq 0 && func_missing_arg "$opt" && break
+			case $1 in
+			  # Valid mode arguments:
+			  clean)	;;
+			  compile)	;;
+			  execute)	;;
+			  finish)	;;
+			  install)	;;
+			  link)		;;
+			  relink)	;;
+			  uninstall)	;;
+
+			  # Catch anything else as an error
+			  *) func_error "invalid argument for $opt"
+			     exit_cmd=exit
+			     break
+			     ;;
+		        esac
+
+			mode="$1"
+			shift
+			;;
+
+      --preserve-dup-deps)
+			opt_duplicate_deps=:				;;
+
+      --quiet|--silent)	preserve_args="$preserve_args $opt"
+			opt_silent=:
+			;;
+
+      --verbose| -v)	preserve_args="$preserve_args $opt"
+			opt_silent=false
+			;;
+
+      --tag)		test "$#" -eq 0 && func_missing_arg "$opt" && break
+			preserve_args="$preserve_args $opt $1"
+			func_enable_tag "$1"	# tagname is set here
+			shift
+			;;
+
+      # Separate optargs to long options:
+      -dlopen=*|--mode=*|--tag=*)
+			func_opt_split "$opt"
+			set dummy "$func_opt_split_opt" "$func_opt_split_arg" ${1+"$@"}
+			shift
+			;;
+
+      -\?|-h)		func_usage					;;
+      --help)		opt_help=:					;;
+      --version)	func_version					;;
+
+      -*)		func_fatal_help "unrecognized option \`$opt'"	;;
+
+      *)		nonopt="$opt"
+			break
+			;;
+    esac
+  done
+
+
+  case $host in
+    *cygwin* | *mingw* | *pw32* | *cegcc*)
+      # don't eliminate duplications in $postdeps and $predeps
+      opt_duplicate_compiler_generated_deps=:
+      ;;
+    *)
+      opt_duplicate_compiler_generated_deps=$opt_duplicate_deps
+      ;;
+  esac
+
+  # Having warned about all mis-specified options, bail out if
+  # anything was wrong.
+  $exit_cmd $EXIT_FAILURE
+}
+
+# func_check_version_match
+# Ensure that we are using m4 macros, and libtool script from the same
+# release of libtool.
+func_check_version_match ()
+{
+  if test "$package_revision" != "$macro_revision"; then
+    if test "$VERSION" != "$macro_version"; then
+      if test -z "$macro_version"; then
+        cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, but the
+$progname: definition of this LT_INIT comes from an older release.
+$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION
+$progname: and run autoconf again.
+_LT_EOF
+      else
+        cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, but the
+$progname: definition of this LT_INIT comes from $PACKAGE $macro_version.
+$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION
+$progname: and run autoconf again.
+_LT_EOF
+      fi
+    else
+      cat >&2 <<_LT_EOF
+$progname: Version mismatch error.  This is $PACKAGE $VERSION, revision $package_revision,
+$progname: but the definition of this LT_INIT comes from revision $macro_revision.
+$progname: You should recreate aclocal.m4 with macros from revision $package_revision
+$progname: of $PACKAGE $VERSION and run autoconf again.
+_LT_EOF
+    fi
+
+    exit $EXIT_MISMATCH
+  fi
+}
+
+
+## ----------- ##
+##    Main.    ##
+## ----------- ##
+
+$opt_help || {
+  # Sanity checks first:
+  func_check_version_match
+
+  if test "$build_libtool_libs" != yes && test "$build_old_libs" != yes; then
+    func_fatal_configuration "not configured to build any kind of library"
+  fi
+
+  test -z "$mode" && func_fatal_error "error: you must specify a MODE."
+
+
+  # Darwin sucks
+  eval std_shrext=\"$shrext_cmds\"
+
+
+  # Only execute mode is allowed to have -dlopen flags.
+  if test -n "$execute_dlfiles" && test "$mode" != execute; then
+    func_error "unrecognized option \`-dlopen'"
+    $ECHO "$help" 1>&2
+    exit $EXIT_FAILURE
+  fi
+
+  # Change the help message to a mode-specific one.
+  generic_help="$help"
+  help="Try \`$progname --help --mode=$mode' for more information."
+}
+
+
+# func_lalib_p file
+# True iff FILE is a libtool `.la' library or `.lo' object file.
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_lalib_p ()
+{
+    test -f "$1" &&
+      $SED -e 4q "$1" 2>/dev/null \
+        | $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1
+}
+
+# func_lalib_unsafe_p file
+# True iff FILE is a libtool `.la' library or `.lo' object file.
+# This function implements the same check as func_lalib_p without
+# resorting to external programs.  To this end, it redirects stdin and
+# closes it afterwards, without saving the original file descriptor.
+# As a safety measure, use it only where a negative result would be
+# fatal anyway.  Works if `file' does not exist.
+func_lalib_unsafe_p ()
+{
+    lalib_p=no
+    if test -f "$1" && test -r "$1" && exec 5<&0 <"$1"; then
+	for lalib_p_l in 1 2 3 4
+	do
+	    read lalib_p_line
+	    case "$lalib_p_line" in
+		\#\ Generated\ by\ *$PACKAGE* ) lalib_p=yes; break;;
+	    esac
+	done
+	exec 0<&5 5<&-
+    fi
+    test "$lalib_p" = yes
+}
+
+# func_ltwrapper_script_p file
+# True iff FILE is a libtool wrapper script
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_script_p ()
+{
+    func_lalib_p "$1"
+}
+
+# func_ltwrapper_executable_p file
+# True iff FILE is a libtool wrapper executable
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_executable_p ()
+{
+    func_ltwrapper_exec_suffix=
+    case $1 in
+    *.exe) ;;
+    *) func_ltwrapper_exec_suffix=.exe ;;
+    esac
+    $GREP "$magic_exe" "$1$func_ltwrapper_exec_suffix" >/dev/null 2>&1
+}
+
+# func_ltwrapper_scriptname file
+# Assumes file is an ltwrapper_executable
+# uses $file to determine the appropriate filename for a
+# temporary ltwrapper_script.
+func_ltwrapper_scriptname ()
+{
+    func_ltwrapper_scriptname_result=""
+    if func_ltwrapper_executable_p "$1"; then
+	func_dirname_and_basename "$1" "" "."
+	func_stripname '' '.exe' "$func_basename_result"
+	func_ltwrapper_scriptname_result="$func_dirname_result/$objdir/${func_stripname_result}_ltshwrapper"
+    fi
+}
+
+# func_ltwrapper_p file
+# True iff FILE is a libtool wrapper script or wrapper executable
+# This function is only a basic sanity check; it will hardly flush out
+# determined imposters.
+func_ltwrapper_p ()
+{
+    func_ltwrapper_script_p "$1" || func_ltwrapper_executable_p "$1"
+}
+
+
+# func_execute_cmds commands fail_cmd
+# Execute tilde-delimited COMMANDS.
+# If FAIL_CMD is given, eval that upon failure.
+# FAIL_CMD may read-access the current command in variable CMD!
+func_execute_cmds ()
+{
+    $opt_debug
+    save_ifs=$IFS; IFS='~'
+    for cmd in $1; do
+      IFS=$save_ifs
+      eval cmd=\"$cmd\"
+      func_show_eval "$cmd" "${2-:}"
+    done
+    IFS=$save_ifs
+}
+
+
+# func_source file
+# Source FILE, adding directory component if necessary.
+# Note that it is not necessary on cygwin/mingw to append a dot to
+# FILE even if both FILE and FILE.exe exist: automatic-append-.exe
+# behavior happens only for exec(3), not for open(2)!  Also, sourcing
+# `FILE.' does not work on cygwin managed mounts.
+func_source ()
+{
+    $opt_debug
+    case $1 in
+    */* | *\\*)	. "$1" ;;
+    *)		. "./$1" ;;
+    esac
+}
+
+
+# func_infer_tag arg
+# Infer tagged configuration to use if any are available and
+# if one wasn't chosen via the "--tag" command line option.
+# Only attempt this if the compiler in the base compile
+# command doesn't match the default compiler.
+# arg is usually of the form 'gcc ...'
+func_infer_tag ()
+{
+    $opt_debug
+    if test -n "$available_tags" && test -z "$tagname"; then
+      CC_quoted=
+      for arg in $CC; do
+        func_quote_for_eval "$arg"
+	CC_quoted="$CC_quoted $func_quote_for_eval_result"
+      done
+      case $@ in
+      # Blanks in the command may have been stripped by the calling shell,
+      # but not from the CC environment variable when configure was run.
+      " $CC "* | "$CC "* | " `$ECHO $CC` "* | "`$ECHO $CC` "* | " $CC_quoted"* | "$CC_quoted "* | " `$ECHO $CC_quoted` "* | "`$ECHO $CC_quoted` "*) ;;
+      # Blanks at the start of $base_compile will cause this to fail
+      # if we don't check for them as well.
+      *)
+	for z in $available_tags; do
+	  if $GREP "^# ### BEGIN LIBTOOL TAG CONFIG: $z$" < "$progpath" > /dev/null; then
+	    # Evaluate the configuration.
+	    eval "`${SED} -n -e '/^# ### BEGIN LIBTOOL TAG CONFIG: '$z'$/,/^# ### END LIBTOOL TAG CONFIG: '$z'$/p' < $progpath`"
+	    CC_quoted=
+	    for arg in $CC; do
+	      # Double-quote args containing other shell metacharacters.
+	      func_quote_for_eval "$arg"
+	      CC_quoted="$CC_quoted $func_quote_for_eval_result"
+	    done
+	    case "$@ " in
+	      " $CC "* | "$CC "* | " `$ECHO $CC` "* | "`$ECHO $CC` "* | " $CC_quoted"* | "$CC_quoted "* | " `$ECHO $CC_quoted` "* | "`$ECHO $CC_quoted` "*)
+	      # The compiler in the base compile command matches
+	      # the one in the tagged configuration.
+	      # Assume this is the tagged configuration we want.
+	      tagname=$z
+	      break
+	      ;;
+	    esac
+	  fi
+	done
+	# If $tagname still isn't set, then no tagged configuration
+	# was found and let the user know that the "--tag" command
+	# line option must be used.
+	if test -z "$tagname"; then
+	  func_echo "unable to infer tagged configuration"
+	  func_fatal_error "specify a tag with \`--tag'"
+#	else
+#	  func_verbose "using $tagname tagged configuration"
+	fi
+	;;
+      esac
+    fi
+}
+
+
+
+# func_write_libtool_object output_name pic_name nonpic_name
+# Create a libtool object file (analogous to a ".la" file),
+# but don't create it if we're doing a dry run.
+func_write_libtool_object ()
+{
+    write_libobj=${1}
+    if test "$build_libtool_libs" = yes; then
+      write_lobj=\'${2}\'
+    else
+      write_lobj=none
+    fi
+
+    if test "$build_old_libs" = yes; then
+      write_oldobj=\'${3}\'
+    else
+      write_oldobj=none
+    fi
+
+    $opt_dry_run || {
+      cat >${write_libobj}T <<EOF
+# $write_libobj - a libtool object file
+# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# Name of the PIC object.
+pic_object=$write_lobj
+
+# Name of the non-PIC object
+non_pic_object=$write_oldobj
+
+EOF
+      $MV "${write_libobj}T" "${write_libobj}"
+    }
+}
+
+# func_mode_compile arg...
+func_mode_compile ()
+{
+    $opt_debug
+    # Get the compilation command and the source file.
+    base_compile=
+    srcfile="$nonopt"  #  always keep a non-empty value in "srcfile"
+    suppress_opt=yes
+    suppress_output=
+    arg_mode=normal
+    libobj=
+    later=
+    pie_flag=
+
+    for arg
+    do
+      case $arg_mode in
+      arg  )
+	# do not "continue".  Instead, add this to base_compile
+	lastarg="$arg"
+	arg_mode=normal
+	;;
+
+      target )
+	libobj="$arg"
+	arg_mode=normal
+	continue
+	;;
+
+      normal )
+	# Accept any command-line options.
+	case $arg in
+	-o)
+	  test -n "$libobj" && \
+	    func_fatal_error "you cannot specify \`-o' more than once"
+	  arg_mode=target
+	  continue
+	  ;;
+
+	-pie | -fpie | -fPIE)
+          pie_flag="$pie_flag $arg"
+	  continue
+	  ;;
+
+	-shared | -static | -prefer-pic | -prefer-non-pic)
+	  later="$later $arg"
+	  continue
+	  ;;
+
+	-no-suppress)
+	  suppress_opt=no
+	  continue
+	  ;;
+
+	-Xcompiler)
+	  arg_mode=arg  #  the next one goes into the "base_compile" arg list
+	  continue      #  The current "srcfile" will either be retained or
+	  ;;            #  replaced later.  I would guess that would be a bug.
+
+	-Wc,*)
+	  func_stripname '-Wc,' '' "$arg"
+	  args=$func_stripname_result
+	  lastarg=
+	  save_ifs="$IFS"; IFS=','
+	  for arg in $args; do
+	    IFS="$save_ifs"
+	    func_quote_for_eval "$arg"
+	    lastarg="$lastarg $func_quote_for_eval_result"
+	  done
+	  IFS="$save_ifs"
+	  func_stripname ' ' '' "$lastarg"
+	  lastarg=$func_stripname_result
+
+	  # Add the arguments to base_compile.
+	  base_compile="$base_compile $lastarg"
+	  continue
+	  ;;
+
+	*)
+	  # Accept the current argument as the source file.
+	  # The previous "srcfile" becomes the current argument.
+	  #
+	  lastarg="$srcfile"
+	  srcfile="$arg"
+	  ;;
+	esac  #  case $arg
+	;;
+      esac    #  case $arg_mode
+
+      # Aesthetically quote the previous argument.
+      func_quote_for_eval "$lastarg"
+      base_compile="$base_compile $func_quote_for_eval_result"
+    done # for arg
+
+    case $arg_mode in
+    arg)
+      func_fatal_error "you must specify an argument for -Xcompile"
+      ;;
+    target)
+      func_fatal_error "you must specify a target with \`-o'"
+      ;;
+    *)
+      # Get the name of the library object.
+      test -z "$libobj" && {
+	func_basename "$srcfile"
+	libobj="$func_basename_result"
+      }
+      ;;
+    esac
+
+    # Recognize several different file suffixes.
+    # If the user specifies -o file.o, it is replaced with file.lo
+    case $libobj in
+    *.[cCFSifmso] | \
+    *.ada | *.adb | *.ads | *.asm | \
+    *.c++ | *.cc | *.ii | *.class | *.cpp | *.cxx | \
+    *.[fF][09]? | *.for | *.java | *.obj | *.sx)
+      func_xform "$libobj"
+      libobj=$func_xform_result
+      ;;
+    esac
+
+    case $libobj in
+    *.lo) func_lo2o "$libobj"; obj=$func_lo2o_result ;;
+    *)
+      func_fatal_error "cannot determine name of library object from \`$libobj'"
+      ;;
+    esac
+
+    func_infer_tag $base_compile
+
+    for arg in $later; do
+      case $arg in
+      -shared)
+	test "$build_libtool_libs" != yes && \
+	  func_fatal_configuration "can not build a shared library"
+	build_old_libs=no
+	continue
+	;;
+
+      -static)
+	build_libtool_libs=no
+	build_old_libs=yes
+	continue
+	;;
+
+      -prefer-pic)
+	pic_mode=yes
+	continue
+	;;
+
+      -prefer-non-pic)
+	pic_mode=no
+	continue
+	;;
+      esac
+    done
+
+    func_quote_for_eval "$libobj"
+    test "X$libobj" != "X$func_quote_for_eval_result" \
+      && $ECHO "X$libobj" | $GREP '[]~#^*{};<>?"'"'"'	 &()|`$[]' \
+      && func_warning "libobj name \`$libobj' may not contain shell special characters."
+    func_dirname_and_basename "$obj" "/" ""
+    objname="$func_basename_result"
+    xdir="$func_dirname_result"
+    lobj=${xdir}$objdir/$objname
+
+    test -z "$base_compile" && \
+      func_fatal_help "you must specify a compilation command"
+
+    # Delete any leftover library objects.
+    if test "$build_old_libs" = yes; then
+      removelist="$obj $lobj $libobj ${libobj}T"
+    else
+      removelist="$lobj $libobj ${libobj}T"
+    fi
+
+    # On Cygwin there's no "real" PIC flag so we must build both object types
+    case $host_os in
+    cygwin* | mingw* | pw32* | os2* | cegcc*)
+      pic_mode=default
+      ;;
+    esac
+    if test "$pic_mode" = no && test "$deplibs_check_method" != pass_all; then
+      # non-PIC code in shared libraries is not supported
+      pic_mode=default
+    fi
+
+    # Calculate the filename of the output object if compiler does
+    # not support -o with -c
+    if test "$compiler_c_o" = no; then
+      output_obj=`$ECHO "X$srcfile" | $Xsed -e 's%^.*/%%' -e 's%\.[^.]*$%%'`.${objext}
+      lockfile="$output_obj.lock"
+    else
+      output_obj=
+      need_locks=no
+      lockfile=
+    fi
+
+    # Lock this critical section if it is needed
+    # We use this script file to make the link, it avoids creating a new file
+    if test "$need_locks" = yes; then
+      until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do
+	func_echo "Waiting for $lockfile to be removed"
+	sleep 2
+      done
+    elif test "$need_locks" = warn; then
+      if test -f "$lockfile"; then
+	$ECHO "\
+*** ERROR, $lockfile exists and contains:
+`cat $lockfile 2>/dev/null`
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+      removelist="$removelist $output_obj"
+      $ECHO "$srcfile" > "$lockfile"
+    fi
+
+    $opt_dry_run || $RM $removelist
+    removelist="$removelist $lockfile"
+    trap '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' 1 2 15
+
+    if test -n "$fix_srcfile_path"; then
+      eval srcfile=\"$fix_srcfile_path\"
+    fi
+    func_quote_for_eval "$srcfile"
+    qsrcfile=$func_quote_for_eval_result
+
+    # Only build a PIC object if we are building libtool libraries.
+    if test "$build_libtool_libs" = yes; then
+      # Without this assignment, base_compile gets emptied.
+      fbsd_hideous_sh_bug=$base_compile
+
+      if test "$pic_mode" != no; then
+	command="$base_compile $qsrcfile $pic_flag"
+      else
+	# Don't build PIC code
+	command="$base_compile $qsrcfile"
+      fi
+
+      func_mkdir_p "$xdir$objdir"
+
+      if test -z "$output_obj"; then
+	# Place PIC objects in $objdir
+	command="$command -o $lobj"
+      fi
+
+      func_show_eval_locale "$command"	\
+          'test -n "$output_obj" && $RM $removelist; exit $EXIT_FAILURE'
+
+      if test "$need_locks" = warn &&
+	 test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then
+	$ECHO "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+
+      # Just move the object if needed, then go on to compile the next one
+      if test -n "$output_obj" && test "X$output_obj" != "X$lobj"; then
+	func_show_eval '$MV "$output_obj" "$lobj"' \
+	  'error=$?; $opt_dry_run || $RM $removelist; exit $error'
+      fi
+
+      # Allow error messages only from the first compilation.
+      if test "$suppress_opt" = yes; then
+	suppress_output=' >/dev/null 2>&1'
+      fi
+    fi
+
+    # Only build a position-dependent object if we build old libraries.
+    if test "$build_old_libs" = yes; then
+      if test "$pic_mode" != yes; then
+	# Don't build PIC code
+	command="$base_compile $qsrcfile$pie_flag"
+      else
+	command="$base_compile $qsrcfile $pic_flag"
+      fi
+      if test "$compiler_c_o" = yes; then
+	command="$command -o $obj"
+      fi
+
+      # Suppress compiler output if we already did a PIC compilation.
+      command="$command$suppress_output"
+      func_show_eval_locale "$command" \
+        '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE'
+
+      if test "$need_locks" = warn &&
+	 test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then
+	$ECHO "\
+*** ERROR, $lockfile contains:
+`cat $lockfile 2>/dev/null`
+
+but it should contain:
+$srcfile
+
+This indicates that another process is trying to use the same
+temporary object file, and libtool could not work around it because
+your compiler does not support \`-c' and \`-o' together.  If you
+repeat this compilation, it may succeed, by chance, but you had better
+avoid parallel builds (make -j) in this platform, or get a better
+compiler."
+
+	$opt_dry_run || $RM $removelist
+	exit $EXIT_FAILURE
+      fi
+
+      # Just move the object if needed
+      if test -n "$output_obj" && test "X$output_obj" != "X$obj"; then
+	func_show_eval '$MV "$output_obj" "$obj"' \
+	  'error=$?; $opt_dry_run || $RM $removelist; exit $error'
+      fi
+    fi
+
+    $opt_dry_run || {
+      func_write_libtool_object "$libobj" "$objdir/$objname" "$objname"
+
+      # Unlock the critical section if it was locked
+      if test "$need_locks" != no; then
+	removelist=$lockfile
+        $RM "$lockfile"
+      fi
+    }
+
+    exit $EXIT_SUCCESS
+}
+
+$opt_help || {
+test "$mode" = compile && func_mode_compile ${1+"$@"}
+}
+
+func_mode_help ()
+{
+    # We need to display help for each of the modes.
+    case $mode in
+      "")
+        # Generic help is extracted from the usage comments
+        # at the start of this file.
+        func_help
+        ;;
+
+      clean)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=clean RM [RM-OPTION]... FILE...
+
+Remove files from the build directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically \`/bin/rm').  RM-OPTIONS are options (such as \`-f') to be passed
+to RM.
+
+If FILE is a libtool library, object or program, all the files associated
+with it are deleted. Otherwise, only FILE itself is deleted using RM."
+        ;;
+
+      compile)
+      $ECHO \
+"Usage: $progname [OPTION]... --mode=compile COMPILE-COMMAND... SOURCEFILE
+
+Compile a source file into a libtool library object.
+
+This mode accepts the following additional options:
+
+  -o OUTPUT-FILE    set the output file name to OUTPUT-FILE
+  -no-suppress      do not suppress compiler output for multiple passes
+  -prefer-pic       try to building PIC objects only
+  -prefer-non-pic   try to building non-PIC objects only
+  -shared           do not build a \`.o' file suitable for static linking
+  -static           only build a \`.o' file suitable for static linking
+
+COMPILE-COMMAND is a command to be used in creating a \`standard' object file
+from the given SOURCEFILE.
+
+The output file name is determined by removing the directory component from
+SOURCEFILE, then substituting the C source code suffix \`.c' with the
+library object suffix, \`.lo'."
+        ;;
+
+      execute)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=execute COMMAND [ARGS]...
+
+Automatically set library path, then run a program.
+
+This mode accepts the following additional options:
+
+  -dlopen FILE      add the directory containing FILE to the library path
+
+This mode sets the library path environment variable according to \`-dlopen'
+flags.
+
+If any of the ARGS are libtool executable wrappers, then they are translated
+into their corresponding uninstalled binary, and any of their required library
+directories are added to the library path.
+
+Then, COMMAND is executed, with ARGS as arguments."
+        ;;
+
+      finish)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=finish [LIBDIR]...
+
+Complete the installation of libtool libraries.
+
+Each LIBDIR is a directory that contains libtool libraries.
+
+The commands that this mode executes may require superuser privileges.  Use
+the \`--dry-run' option if you just want to see what would be executed."
+        ;;
+
+      install)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=install INSTALL-COMMAND...
+
+Install executables or libraries.
+
+INSTALL-COMMAND is the installation command.  The first component should be
+either the \`install' or \`cp' program.
+
+The following components of INSTALL-COMMAND are treated specially:
+
+  -inst-prefix PREFIX-DIR  Use PREFIX-DIR as a staging area for installation
+
+The rest of the components are interpreted as arguments to that command (only
+BSD-compatible install options are recognized)."
+        ;;
+
+      link)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=link LINK-COMMAND...
+
+Link object files or libraries together to form another library, or to
+create an executable program.
+
+LINK-COMMAND is a command using the C compiler that you would use to create
+a program from several object files.
+
+The following components of LINK-COMMAND are treated specially:
+
+  -all-static       do not do any dynamic linking at all
+  -avoid-version    do not add a version suffix if possible
+  -dlopen FILE      \`-dlpreopen' FILE if it cannot be dlopened at runtime
+  -dlpreopen FILE   link in FILE and add its symbols to lt_preloaded_symbols
+  -export-dynamic   allow symbols from OUTPUT-FILE to be resolved with dlsym(3)
+  -export-symbols SYMFILE
+                    try to export only the symbols listed in SYMFILE
+  -export-symbols-regex REGEX
+                    try to export only the symbols matching REGEX
+  -LLIBDIR          search LIBDIR for required installed libraries
+  -lNAME            OUTPUT-FILE requires the installed library libNAME
+  -module           build a library that can dlopened
+  -no-fast-install  disable the fast-install mode
+  -no-install       link a not-installable executable
+  -no-undefined     declare that a library does not refer to external symbols
+  -o OUTPUT-FILE    create OUTPUT-FILE from the specified objects
+  -objectlist FILE  Use a list of object files found in FILE to specify objects
+  -precious-files-regex REGEX
+                    don't remove output files matching REGEX
+  -release RELEASE  specify package release information
+  -rpath LIBDIR     the created library will eventually be installed in LIBDIR
+  -R[ ]LIBDIR       add LIBDIR to the runtime path of programs and libraries
+  -shared           only do dynamic linking of libtool libraries
+  -shrext SUFFIX    override the standard shared library file extension
+  -static           do not do any dynamic linking of uninstalled libtool libraries
+  -static-libtool-libs
+                    do not do any dynamic linking of libtool libraries
+  -version-info CURRENT[:REVISION[:AGE]]
+                    specify library version info [each variable defaults to 0]
+  -weak LIBNAME     declare that the target provides the LIBNAME interface
+
+All other options (arguments beginning with \`-') are ignored.
+
+Every other argument is treated as a filename.  Files ending in \`.la' are
+treated as uninstalled libtool libraries, other files are standard or library
+object files.
+
+If the OUTPUT-FILE ends in \`.la', then a libtool library is created,
+only library objects (\`.lo' files) may be specified, and \`-rpath' is
+required, except when creating a convenience library.
+
+If OUTPUT-FILE ends in \`.a' or \`.lib', then a standard library is created
+using \`ar' and \`ranlib', or on Windows using \`lib'.
+
+If OUTPUT-FILE ends in \`.lo' or \`.${objext}', then a reloadable object file
+is created, otherwise an executable program is created."
+        ;;
+
+      uninstall)
+        $ECHO \
+"Usage: $progname [OPTION]... --mode=uninstall RM [RM-OPTION]... FILE...
+
+Remove libraries from an installation directory.
+
+RM is the name of the program to use to delete files associated with each FILE
+(typically \`/bin/rm').  RM-OPTIONS are options (such as \`-f') to be passed
+to RM.
+
+If FILE is a libtool library, all the files associated with it are deleted.
+Otherwise, only FILE itself is deleted using RM."
+        ;;
+
+      *)
+        func_fatal_help "invalid operation mode \`$mode'"
+        ;;
+    esac
+
+    $ECHO
+    $ECHO "Try \`$progname --help' for more information about other modes."
+
+    exit $?
+}
+
+  # Now that we've collected a possible --mode arg, show help if necessary
+  $opt_help && func_mode_help
+
+
+# func_mode_execute arg...
+func_mode_execute ()
+{
+    $opt_debug
+    # The first argument is the command name.
+    cmd="$nonopt"
+    test -z "$cmd" && \
+      func_fatal_help "you must specify a COMMAND"
+
+    # Handle -dlopen flags immediately.
+    for file in $execute_dlfiles; do
+      test -f "$file" \
+	|| func_fatal_help "\`$file' is not a file"
+
+      dir=
+      case $file in
+      *.la)
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$file" \
+	  || func_fatal_help "\`$lib' is not a valid libtool archive"
+
+	# Read the libtool library.
+	dlname=
+	library_names=
+	func_source "$file"
+
+	# Skip this library if it cannot be dlopened.
+	if test -z "$dlname"; then
+	  # Warn if it was a shared library.
+	  test -n "$library_names" && \
+	    func_warning "\`$file' was not linked with \`-export-dynamic'"
+	  continue
+	fi
+
+	func_dirname "$file" "" "."
+	dir="$func_dirname_result"
+
+	if test -f "$dir/$objdir/$dlname"; then
+	  dir="$dir/$objdir"
+	else
+	  if test ! -f "$dir/$dlname"; then
+	    func_fatal_error "cannot find \`$dlname' in \`$dir' or \`$dir/$objdir'"
+	  fi
+	fi
+	;;
+
+      *.lo)
+	# Just add the directory containing the .lo file.
+	func_dirname "$file" "" "."
+	dir="$func_dirname_result"
+	;;
+
+      *)
+	func_warning "\`-dlopen' is ignored for non-libtool libraries and objects"
+	continue
+	;;
+      esac
+
+      # Get the absolute pathname.
+      absdir=`cd "$dir" && pwd`
+      test -n "$absdir" && dir="$absdir"
+
+      # Now add the directory to shlibpath_var.
+      if eval "test -z \"\$$shlibpath_var\""; then
+	eval "$shlibpath_var=\"\$dir\""
+      else
+	eval "$shlibpath_var=\"\$dir:\$$shlibpath_var\""
+      fi
+    done
+
+    # This variable tells wrapper scripts just to set shlibpath_var
+    # rather than running their programs.
+    libtool_execute_magic="$magic"
+
+    # Check if any of the arguments is a wrapper script.
+    args=
+    for file
+    do
+      case $file in
+      -*) ;;
+      *)
+	# Do a test to see if this is really a libtool program.
+	if func_ltwrapper_script_p "$file"; then
+	  func_source "$file"
+	  # Transform arg to wrapped name.
+	  file="$progdir/$program"
+	elif func_ltwrapper_executable_p "$file"; then
+	  func_ltwrapper_scriptname "$file"
+	  func_source "$func_ltwrapper_scriptname_result"
+	  # Transform arg to wrapped name.
+	  file="$progdir/$program"
+	fi
+	;;
+      esac
+      # Quote arguments (to preserve shell metacharacters).
+      func_quote_for_eval "$file"
+      args="$args $func_quote_for_eval_result"
+    done
+
+    if test "X$opt_dry_run" = Xfalse; then
+      if test -n "$shlibpath_var"; then
+	# Export the shlibpath_var.
+	eval "export $shlibpath_var"
+      fi
+
+      # Restore saved environment variables
+      for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
+      do
+	eval "if test \"\${save_$lt_var+set}\" = set; then
+                $lt_var=\$save_$lt_var; export $lt_var
+	      else
+		$lt_unset $lt_var
+	      fi"
+      done
+
+      # Now prepare to actually exec the command.
+      exec_cmd="\$cmd$args"
+    else
+      # Display what would be done.
+      if test -n "$shlibpath_var"; then
+	eval "\$ECHO \"\$shlibpath_var=\$$shlibpath_var\""
+	$ECHO "export $shlibpath_var"
+      fi
+      $ECHO "$cmd$args"
+      exit $EXIT_SUCCESS
+    fi
+}
+
+test "$mode" = execute && func_mode_execute ${1+"$@"}
+
+
+# func_mode_finish arg...
+func_mode_finish ()
+{
+    $opt_debug
+    libdirs="$nonopt"
+    admincmds=
+
+    if test -n "$finish_cmds$finish_eval" && test -n "$libdirs"; then
+      for dir
+      do
+	libdirs="$libdirs $dir"
+      done
+
+      for libdir in $libdirs; do
+	if test -n "$finish_cmds"; then
+	  # Do each command in the finish commands.
+	  func_execute_cmds "$finish_cmds" 'admincmds="$admincmds
+'"$cmd"'"'
+	fi
+	if test -n "$finish_eval"; then
+	  # Do the single finish_eval.
+	  eval cmds=\"$finish_eval\"
+	  $opt_dry_run || eval "$cmds" || admincmds="$admincmds
+       $cmds"
+	fi
+      done
+    fi
+
+    # Exit here if they wanted silent mode.
+    $opt_silent && exit $EXIT_SUCCESS
+
+    $ECHO "X----------------------------------------------------------------------" | $Xsed
+    $ECHO "Libraries have been installed in:"
+    for libdir in $libdirs; do
+      $ECHO "   $libdir"
+    done
+    $ECHO
+    $ECHO "If you ever happen to want to link against installed libraries"
+    $ECHO "in a given directory, LIBDIR, you must either use libtool, and"
+    $ECHO "specify the full pathname of the library, or use the \`-LLIBDIR'"
+    $ECHO "flag during linking and do at least one of the following:"
+    if test -n "$shlibpath_var"; then
+      $ECHO "   - add LIBDIR to the \`$shlibpath_var' environment variable"
+      $ECHO "     during execution"
+    fi
+    if test -n "$runpath_var"; then
+      $ECHO "   - add LIBDIR to the \`$runpath_var' environment variable"
+      $ECHO "     during linking"
+    fi
+    if test -n "$hardcode_libdir_flag_spec"; then
+      libdir=LIBDIR
+      eval flag=\"$hardcode_libdir_flag_spec\"
+
+      $ECHO "   - use the \`$flag' linker flag"
+    fi
+    if test -n "$admincmds"; then
+      $ECHO "   - have your system administrator run these commands:$admincmds"
+    fi
+    if test -f /etc/ld.so.conf; then
+      $ECHO "   - have your system administrator add LIBDIR to \`/etc/ld.so.conf'"
+    fi
+    $ECHO
+
+    $ECHO "See any operating system documentation about shared libraries for"
+    case $host in
+      solaris2.[6789]|solaris2.1[0-9])
+        $ECHO "more information, such as the ld(1), crle(1) and ld.so(8) manual"
+	$ECHO "pages."
+	;;
+      *)
+        $ECHO "more information, such as the ld(1) and ld.so(8) manual pages."
+        ;;
+    esac
+    $ECHO "X----------------------------------------------------------------------" | $Xsed
+    exit $EXIT_SUCCESS
+}
+
+test "$mode" = finish && func_mode_finish ${1+"$@"}
+
+
+# func_mode_install arg...
+func_mode_install ()
+{
+    $opt_debug
+    # There may be an optional sh(1) argument at the beginning of
+    # install_prog (especially on Windows NT).
+    if test "$nonopt" = "$SHELL" || test "$nonopt" = /bin/sh ||
+       # Allow the use of GNU shtool's install command.
+       $ECHO "X$nonopt" | $GREP shtool >/dev/null; then
+      # Aesthetically quote it.
+      func_quote_for_eval "$nonopt"
+      install_prog="$func_quote_for_eval_result "
+      arg=$1
+      shift
+    else
+      install_prog=
+      arg=$nonopt
+    fi
+
+    # The real first argument should be the name of the installation program.
+    # Aesthetically quote it.
+    func_quote_for_eval "$arg"
+    install_prog="$install_prog$func_quote_for_eval_result"
+
+    # We need to accept at least all the BSD install flags.
+    dest=
+    files=
+    opts=
+    prev=
+    install_type=
+    isdir=no
+    stripme=
+    for arg
+    do
+      if test -n "$dest"; then
+	files="$files $dest"
+	dest=$arg
+	continue
+      fi
+
+      case $arg in
+      -d) isdir=yes ;;
+      -f)
+	case " $install_prog " in
+	*[\\\ /]cp\ *) ;;
+	*) prev=$arg ;;
+	esac
+	;;
+      -g | -m | -o)
+	prev=$arg
+	;;
+      -s)
+	stripme=" -s"
+	continue
+	;;
+      -*)
+	;;
+      *)
+	# If the previous option needed an argument, then skip it.
+	if test -n "$prev"; then
+	  prev=
+	else
+	  dest=$arg
+	  continue
+	fi
+	;;
+      esac
+
+      # Aesthetically quote the argument.
+      func_quote_for_eval "$arg"
+      install_prog="$install_prog $func_quote_for_eval_result"
+    done
+
+    test -z "$install_prog" && \
+      func_fatal_help "you must specify an install program"
+
+    test -n "$prev" && \
+      func_fatal_help "the \`$prev' option requires an argument"
+
+    if test -z "$files"; then
+      if test -z "$dest"; then
+	func_fatal_help "no file or destination specified"
+      else
+	func_fatal_help "you must specify a destination"
+      fi
+    fi
+
+    # Strip any trailing slash from the destination.
+    func_stripname '' '/' "$dest"
+    dest=$func_stripname_result
+
+    # Check to see that the destination is a directory.
+    test -d "$dest" && isdir=yes
+    if test "$isdir" = yes; then
+      destdir="$dest"
+      destname=
+    else
+      func_dirname_and_basename "$dest" "" "."
+      destdir="$func_dirname_result"
+      destname="$func_basename_result"
+
+      # Not a directory, so check to see that there is only one file specified.
+      set dummy $files; shift
+      test "$#" -gt 1 && \
+	func_fatal_help "\`$dest' is not a directory"
+    fi
+    case $destdir in
+    [\\/]* | [A-Za-z]:[\\/]*) ;;
+    *)
+      for file in $files; do
+	case $file in
+	*.lo) ;;
+	*)
+	  func_fatal_help "\`$destdir' must be an absolute directory name"
+	  ;;
+	esac
+      done
+      ;;
+    esac
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic="$magic"
+
+    staticlibs=
+    future_libdirs=
+    current_libdirs=
+    for file in $files; do
+
+      # Do each installation.
+      case $file in
+      *.$libext)
+	# Do the static libraries later.
+	staticlibs="$staticlibs $file"
+	;;
+
+      *.la)
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$file" \
+	  || func_fatal_help "\`$file' is not a valid libtool archive"
+
+	library_names=
+	old_library=
+	relink_command=
+	func_source "$file"
+
+	# Add the libdir to current_libdirs if it is the destination.
+	if test "X$destdir" = "X$libdir"; then
+	  case "$current_libdirs " in
+	  *" $libdir "*) ;;
+	  *) current_libdirs="$current_libdirs $libdir" ;;
+	  esac
+	else
+	  # Note the libdir as a future libdir.
+	  case "$future_libdirs " in
+	  *" $libdir "*) ;;
+	  *) future_libdirs="$future_libdirs $libdir" ;;
+	  esac
+	fi
+
+	func_dirname "$file" "/" ""
+	dir="$func_dirname_result"
+	dir="$dir$objdir"
+
+	if test -n "$relink_command"; then
+	  # Determine the prefix the user has applied to our future dir.
+	  inst_prefix_dir=`$ECHO "X$destdir" | $Xsed -e "s%$libdir\$%%"`
+
+	  # Don't allow the user to place us outside of our expected
+	  # location b/c this prevents finding dependent libraries that
+	  # are installed to the same prefix.
+	  # At present, this check doesn't affect windows .dll's that
+	  # are installed into $libdir/../bin (currently, that works fine)
+	  # but it's something to keep an eye on.
+	  test "$inst_prefix_dir" = "$destdir" && \
+	    func_fatal_error "error: cannot install \`$file' to a directory not ending in $libdir"
+
+	  if test -n "$inst_prefix_dir"; then
+	    # Stick the inst_prefix_dir data into the link command.
+	    relink_command=`$ECHO "X$relink_command" | $Xsed -e "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"`
+	  else
+	    relink_command=`$ECHO "X$relink_command" | $Xsed -e "s%@inst_prefix_dir@%%"`
+	  fi
+
+	  func_warning "relinking \`$file'"
+	  func_show_eval "$relink_command" \
+	    'func_fatal_error "error: relink \`$file'\'' with the above command before installing it"'
+	fi
+
+	# See the names of the shared library.
+	set dummy $library_names; shift
+	if test -n "$1"; then
+	  realname="$1"
+	  shift
+
+	  srcname="$realname"
+	  test -n "$relink_command" && srcname="$realname"T
+
+	  # Install the shared library and build the symlinks.
+	  func_show_eval "$install_prog $dir/$srcname $destdir/$realname" \
+	      'exit $?'
+	  tstripme="$stripme"
+	  case $host_os in
+	  cygwin* | mingw* | pw32* | cegcc*)
+	    case $realname in
+	    *.dll.a)
+	      tstripme=""
+	      ;;
+	    esac
+	    ;;
+	  esac
+	  if test -n "$tstripme" && test -n "$striplib"; then
+	    func_show_eval "$striplib $destdir/$realname" 'exit $?'
+	  fi
+
+	  if test "$#" -gt 0; then
+	    # Delete the old symlinks, and create new ones.
+	    # Try `ln -sf' first, because the `ln' binary might depend on
+	    # the symlink we replace!  Solaris /bin/ln does not understand -f,
+	    # so we also need to try rm && ln -s.
+	    for linkname
+	    do
+	      test "$linkname" != "$realname" \
+		&& func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })"
+	    done
+	  fi
+
+	  # Do each command in the postinstall commands.
+	  lib="$destdir/$realname"
+	  func_execute_cmds "$postinstall_cmds" 'exit $?'
+	fi
+
+	# Install the pseudo-library for information purposes.
+	func_basename "$file"
+	name="$func_basename_result"
+	instname="$dir/$name"i
+	func_show_eval "$install_prog $instname $destdir/$name" 'exit $?'
+
+	# Maybe install the static library, too.
+	test -n "$old_library" && staticlibs="$staticlibs $dir/$old_library"
+	;;
+
+      *.lo)
+	# Install (i.e. copy) a libtool object.
+
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile="$destdir/$destname"
+	else
+	  func_basename "$file"
+	  destfile="$func_basename_result"
+	  destfile="$destdir/$destfile"
+	fi
+
+	# Deduce the name of the destination old-style object file.
+	case $destfile in
+	*.lo)
+	  func_lo2o "$destfile"
+	  staticdest=$func_lo2o_result
+	  ;;
+	*.$objext)
+	  staticdest="$destfile"
+	  destfile=
+	  ;;
+	*)
+	  func_fatal_help "cannot copy a libtool object to \`$destfile'"
+	  ;;
+	esac
+
+	# Install the libtool object if requested.
+	test -n "$destfile" && \
+	  func_show_eval "$install_prog $file $destfile" 'exit $?'
+
+	# Install the old object if enabled.
+	if test "$build_old_libs" = yes; then
+	  # Deduce the name of the old-style object file.
+	  func_lo2o "$file"
+	  staticobj=$func_lo2o_result
+	  func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?'
+	fi
+	exit $EXIT_SUCCESS
+	;;
+
+      *)
+	# Figure out destination file name, if it wasn't already specified.
+	if test -n "$destname"; then
+	  destfile="$destdir/$destname"
+	else
+	  func_basename "$file"
+	  destfile="$func_basename_result"
+	  destfile="$destdir/$destfile"
+	fi
+
+	# If the file is missing, and there is a .exe on the end, strip it
+	# because it is most likely a libtool script we actually want to
+	# install
+	stripped_ext=""
+	case $file in
+	  *.exe)
+	    if test ! -f "$file"; then
+	      func_stripname '' '.exe' "$file"
+	      file=$func_stripname_result
+	      stripped_ext=".exe"
+	    fi
+	    ;;
+	esac
+
+	# Do a test to see if this is really a libtool program.
+	case $host in
+	*cygwin* | *mingw*)
+	    if func_ltwrapper_executable_p "$file"; then
+	      func_ltwrapper_scriptname "$file"
+	      wrapper=$func_ltwrapper_scriptname_result
+	    else
+	      func_stripname '' '.exe' "$file"
+	      wrapper=$func_stripname_result
+	    fi
+	    ;;
+	*)
+	    wrapper=$file
+	    ;;
+	esac
+	if func_ltwrapper_script_p "$wrapper"; then
+	  notinst_deplibs=
+	  relink_command=
+
+	  func_source "$wrapper"
+
+	  # Check the variables that should have been set.
+	  test -z "$generated_by_libtool_version" && \
+	    func_fatal_error "invalid libtool wrapper script \`$wrapper'"
+
+	  finalize=yes
+	  for lib in $notinst_deplibs; do
+	    # Check to see that each library is installed.
+	    libdir=
+	    if test -f "$lib"; then
+	      func_source "$lib"
+	    fi
+	    libfile="$libdir/"`$ECHO "X$lib" | $Xsed -e 's%^.*/%%g'` ### testsuite: skip nested quoting test
+	    if test -n "$libdir" && test ! -f "$libfile"; then
+	      func_warning "\`$lib' has not been installed in \`$libdir'"
+	      finalize=no
+	    fi
+	  done
+
+	  relink_command=
+	  func_source "$wrapper"
+
+	  outputname=
+	  if test "$fast_install" = no && test -n "$relink_command"; then
+	    $opt_dry_run || {
+	      if test "$finalize" = yes; then
+	        tmpdir=`func_mktempdir`
+		func_basename "$file$stripped_ext"
+		file="$func_basename_result"
+	        outputname="$tmpdir/$file"
+	        # Replace the output file specification.
+	        relink_command=`$ECHO "X$relink_command" | $Xsed -e 's%@OUTPUT@%'"$outputname"'%g'`
+
+	        $opt_silent || {
+	          func_quote_for_expand "$relink_command"
+		  eval "func_echo $func_quote_for_expand_result"
+	        }
+	        if eval "$relink_command"; then :
+	          else
+		  func_error "error: relink \`$file' with the above command before installing it"
+		  $opt_dry_run || ${RM}r "$tmpdir"
+		  continue
+	        fi
+	        file="$outputname"
+	      else
+	        func_warning "cannot relink \`$file'"
+	      fi
+	    }
+	  else
+	    # Install the binary that we compiled earlier.
+	    file=`$ECHO "X$file$stripped_ext" | $Xsed -e "s%\([^/]*\)$%$objdir/\1%"`
+	  fi
+	fi
+
+	# remove .exe since cygwin /usr/bin/install will append another
+	# one anyway
+	case $install_prog,$host in
+	*/usr/bin/install*,*cygwin*)
+	  case $file:$destfile in
+	  *.exe:*.exe)
+	    # this is ok
+	    ;;
+	  *.exe:*)
+	    destfile=$destfile.exe
+	    ;;
+	  *:*.exe)
+	    func_stripname '' '.exe' "$destfile"
+	    destfile=$func_stripname_result
+	    ;;
+	  esac
+	  ;;
+	esac
+	func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?'
+	$opt_dry_run || if test -n "$outputname"; then
+	  ${RM}r "$tmpdir"
+	fi
+	;;
+      esac
+    done
+
+    for file in $staticlibs; do
+      func_basename "$file"
+      name="$func_basename_result"
+
+      # Set up the ranlib parameters.
+      oldlib="$destdir/$name"
+
+      func_show_eval "$install_prog \$file \$oldlib" 'exit $?'
+
+      if test -n "$stripme" && test -n "$old_striplib"; then
+	func_show_eval "$old_striplib $oldlib" 'exit $?'
+      fi
+
+      # Do each command in the postinstall commands.
+      func_execute_cmds "$old_postinstall_cmds" 'exit $?'
+    done
+
+    test -n "$future_libdirs" && \
+      func_warning "remember to run \`$progname --finish$future_libdirs'"
+
+    if test -n "$current_libdirs"; then
+      # Maybe just do a dry run.
+      $opt_dry_run && current_libdirs=" -n$current_libdirs"
+      exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs'
+    else
+      exit $EXIT_SUCCESS
+    fi
+}
+
+test "$mode" = install && func_mode_install ${1+"$@"}
+
+
+# func_generate_dlsyms outputname originator pic_p
+# Extract symbols from dlprefiles and create ${outputname}S.o with
+# a dlpreopen symbol table.
+func_generate_dlsyms ()
+{
+    $opt_debug
+    my_outputname="$1"
+    my_originator="$2"
+    my_pic_p="${3-no}"
+    my_prefix=`$ECHO "$my_originator" | sed 's%[^a-zA-Z0-9]%_%g'`
+    my_dlsyms=
+
+    if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+      if test -n "$NM" && test -n "$global_symbol_pipe"; then
+	my_dlsyms="${my_outputname}S.c"
+      else
+	func_error "not configured to extract global symbols from dlpreopened files"
+      fi
+    fi
+
+    if test -n "$my_dlsyms"; then
+      case $my_dlsyms in
+      "") ;;
+      *.c)
+	# Discover the nlist of each of the dlfiles.
+	nlist="$output_objdir/${my_outputname}.nm"
+
+	func_show_eval "$RM $nlist ${nlist}S ${nlist}T"
+
+	# Parse the name list into a source file.
+	func_verbose "creating $output_objdir/$my_dlsyms"
+
+	$opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\
+/* $my_dlsyms - symbol resolution table for \`$my_outputname' dlsym emulation. */
+/* Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION */
+
+#ifdef __cplusplus
+extern \"C\" {
+#endif
+
+/* External symbol declarations for the compiler. */\
+"
+
+	if test "$dlself" = yes; then
+	  func_verbose "generating symbol list for \`$output'"
+
+	  $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist"
+
+	  # Add our own program objects to the symbol list.
+	  progfiles=`$ECHO "X$objs$old_deplibs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+	  for progfile in $progfiles; do
+	    func_verbose "extracting global C symbols from \`$progfile'"
+	    $opt_dry_run || eval "$NM $progfile | $global_symbol_pipe >> '$nlist'"
+	  done
+
+	  if test -n "$exclude_expsyms"; then
+	    $opt_dry_run || {
+	      eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	    }
+	  fi
+
+	  if test -n "$export_symbols_regex"; then
+	    $opt_dry_run || {
+	      eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	    }
+	  fi
+
+	  # Prepare the list of exported symbols
+	  if test -z "$export_symbols"; then
+	    export_symbols="$output_objdir/$outputname.exp"
+	    $opt_dry_run || {
+	      $RM $export_symbols
+	      eval "${SED} -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"'
+	      case $host in
+	      *cygwin* | *mingw* | *cegcc* )
+                eval "echo EXPORTS "'> "$output_objdir/$outputname.def"'
+                eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"'
+	        ;;
+	      esac
+	    }
+	  else
+	    $opt_dry_run || {
+	      eval "${SED} -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"'
+	      eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T'
+	      eval '$MV "$nlist"T "$nlist"'
+	      case $host in
+	        *cygwin | *mingw* | *cegcc* )
+	          eval "echo EXPORTS "'> "$output_objdir/$outputname.def"'
+	          eval 'cat "$nlist" >> "$output_objdir/$outputname.def"'
+	          ;;
+	      esac
+	    }
+	  fi
+	fi
+
+	for dlprefile in $dlprefiles; do
+	  func_verbose "extracting global C symbols from \`$dlprefile'"
+	  func_basename "$dlprefile"
+	  name="$func_basename_result"
+	  $opt_dry_run || {
+	    eval '$ECHO ": $name " >> "$nlist"'
+	    eval "$NM $dlprefile 2>/dev/null | $global_symbol_pipe >> '$nlist'"
+	  }
+	done
+
+	$opt_dry_run || {
+	  # Make sure we have at least an empty file.
+	  test -f "$nlist" || : > "$nlist"
+
+	  if test -n "$exclude_expsyms"; then
+	    $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T
+	    $MV "$nlist"T "$nlist"
+	  fi
+
+	  # Try sorting and uniquifying the output.
+	  if $GREP -v "^: " < "$nlist" |
+	      if sort -k 3 </dev/null >/dev/null 2>&1; then
+		sort -k 3
+	      else
+		sort +2
+	      fi |
+	      uniq > "$nlist"S; then
+	    :
+	  else
+	    $GREP -v "^: " < "$nlist" > "$nlist"S
+	  fi
+
+	  if test -f "$nlist"S; then
+	    eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"'
+	  else
+	    $ECHO '/* NONE */' >> "$output_objdir/$my_dlsyms"
+	  fi
+
+	  $ECHO >> "$output_objdir/$my_dlsyms" "\
+
+/* The mapping between symbol names and symbols.  */
+typedef struct {
+  const char *name;
+  void *address;
+} lt_dlsymlist;
+"
+	  case $host in
+	  *cygwin* | *mingw* | *cegcc* )
+	    $ECHO >> "$output_objdir/$my_dlsyms" "\
+/* DATA imports from DLLs on WIN32 con't be const, because
+   runtime relocations are performed -- see ld's documentation
+   on pseudo-relocs.  */"
+	    lt_dlsym_const= ;;
+	  *osf5*)
+	    echo >> "$output_objdir/$my_dlsyms" "\
+/* This system does not cope well with relocations in const data */"
+	    lt_dlsym_const= ;;
+	  *)
+	    lt_dlsym_const=const ;;
+	  esac
+
+	  $ECHO >> "$output_objdir/$my_dlsyms" "\
+extern $lt_dlsym_const lt_dlsymlist
+lt_${my_prefix}_LTX_preloaded_symbols[];
+$lt_dlsym_const lt_dlsymlist
+lt_${my_prefix}_LTX_preloaded_symbols[] =
+{\
+  { \"$my_originator\", (void *) 0 },"
+
+	  case $need_lib_prefix in
+	  no)
+	    eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms"
+	    ;;
+	  *)
+	    eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms"
+	    ;;
+	  esac
+	  $ECHO >> "$output_objdir/$my_dlsyms" "\
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt_${my_prefix}_LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif\
+"
+	} # !$opt_dry_run
+
+	pic_flag_for_symtable=
+	case "$compile_command " in
+	*" -static "*) ;;
+	*)
+	  case $host in
+	  # compiling the symbol table file with pic_flag works around
+	  # a FreeBSD bug that causes programs to crash when -lm is
+	  # linked before any other PIC object.  But we must not use
+	  # pic_flag when linking with -static.  The problem exists in
+	  # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1.
+	  *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*)
+	    pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;;
+	  *-*-hpux*)
+	    pic_flag_for_symtable=" $pic_flag"  ;;
+	  *)
+	    if test "X$my_pic_p" != Xno; then
+	      pic_flag_for_symtable=" $pic_flag"
+	    fi
+	    ;;
+	  esac
+	  ;;
+	esac
+	symtab_cflags=
+	for arg in $LTCFLAGS; do
+	  case $arg in
+	  -pie | -fpie | -fPIE) ;;
+	  *) symtab_cflags="$symtab_cflags $arg" ;;
+	  esac
+	done
+
+	# Now compile the dynamic symbol file.
+	func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?'
+
+	# Clean up the generated files.
+	func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T"'
+
+	# Transform the symbol file into the correct name.
+	symfileobj="$output_objdir/${my_outputname}S.$objext"
+	case $host in
+	*cygwin* | *mingw* | *cegcc* )
+	  if test -f "$output_objdir/$my_outputname.def"; then
+	    compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"`
+	    finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"`
+	  else
+	    compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"`
+	    finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"`
+	  fi
+	  ;;
+	*)
+	  compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"`
+	  finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"`
+	  ;;
+	esac
+	;;
+      *)
+	func_fatal_error "unknown suffix for \`$my_dlsyms'"
+	;;
+      esac
+    else
+      # We keep going just in case the user didn't refer to
+      # lt_preloaded_symbols.  The linker will fail if global_symbol_pipe
+      # really was required.
+
+      # Nullify the symbol file.
+      compile_command=`$ECHO "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"`
+      finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"`
+    fi
+}
+
+# func_win32_libid arg
+# return the library type of file 'arg'
+#
+# Need a lot of goo to handle *both* DLLs and import libs
+# Has to be a shell function in order to 'eat' the argument
+# that is supplied when $file_magic_command is called.
+func_win32_libid ()
+{
+  $opt_debug
+  win32_libid_type="unknown"
+  win32_fileres=`file -L $1 2>/dev/null`
+  case $win32_fileres in
+  *ar\ archive\ import\ library*) # definitely import
+    win32_libid_type="x86 archive import"
+    ;;
+  *ar\ archive*) # could be an import, or static
+    if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null |
+       $EGREP 'file format pe-i386(.*architecture: i386)?' >/dev/null ; then
+      win32_nmres=`eval $NM -f posix -A $1 |
+	$SED -n -e '
+	    1,100{
+		/ I /{
+		    s,.*,import,
+		    p
+		    q
+		}
+	    }'`
+      case $win32_nmres in
+      import*)  win32_libid_type="x86 archive import";;
+      *)        win32_libid_type="x86 archive static";;
+      esac
+    fi
+    ;;
+  *DLL*)
+    win32_libid_type="x86 DLL"
+    ;;
+  *executable*) # but shell scripts are "executable" too...
+    case $win32_fileres in
+    *MS\ Windows\ PE\ Intel*)
+      win32_libid_type="x86 DLL"
+      ;;
+    esac
+    ;;
+  esac
+  $ECHO "$win32_libid_type"
+}
+
+
+
+# func_extract_an_archive dir oldlib
+func_extract_an_archive ()
+{
+    $opt_debug
+    f_ex_an_ar_dir="$1"; shift
+    f_ex_an_ar_oldlib="$1"
+    func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" 'exit $?'
+    if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then
+     :
+    else
+      func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib"
+    fi
+}
+
+
+# func_extract_archives gentop oldlib ...
+func_extract_archives ()
+{
+    $opt_debug
+    my_gentop="$1"; shift
+    my_oldlibs=${1+"$@"}
+    my_oldobjs=""
+    my_xlib=""
+    my_xabs=""
+    my_xdir=""
+
+    for my_xlib in $my_oldlibs; do
+      # Extract the objects.
+      case $my_xlib in
+	[\\/]* | [A-Za-z]:[\\/]*) my_xabs="$my_xlib" ;;
+	*) my_xabs=`pwd`"/$my_xlib" ;;
+      esac
+      func_basename "$my_xlib"
+      my_xlib="$func_basename_result"
+      my_xlib_u=$my_xlib
+      while :; do
+        case " $extracted_archives " in
+	*" $my_xlib_u "*)
+	  func_arith $extracted_serial + 1
+	  extracted_serial=$func_arith_result
+	  my_xlib_u=lt$extracted_serial-$my_xlib ;;
+	*) break ;;
+	esac
+      done
+      extracted_archives="$extracted_archives $my_xlib_u"
+      my_xdir="$my_gentop/$my_xlib_u"
+
+      func_mkdir_p "$my_xdir"
+
+      case $host in
+      *-darwin*)
+	func_verbose "Extracting $my_xabs"
+	# Do not bother doing anything if just a dry run
+	$opt_dry_run || {
+	  darwin_orig_dir=`pwd`
+	  cd $my_xdir || exit $?
+	  darwin_archive=$my_xabs
+	  darwin_curdir=`pwd`
+	  darwin_base_archive=`basename "$darwin_archive"`
+	  darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true`
+	  if test -n "$darwin_arches"; then
+	    darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'`
+	    darwin_arch=
+	    func_verbose "$darwin_base_archive has multiple architectures $darwin_arches"
+	    for darwin_arch in  $darwin_arches ; do
+	      func_mkdir_p "unfat-$$/${darwin_base_archive}-${darwin_arch}"
+	      $LIPO -thin $darwin_arch -output "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" "${darwin_archive}"
+	      cd "unfat-$$/${darwin_base_archive}-${darwin_arch}"
+	      func_extract_an_archive "`pwd`" "${darwin_base_archive}"
+	      cd "$darwin_curdir"
+	      $RM "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}"
+	    done # $darwin_arches
+            ## Okay now we've a bunch of thin objects, gotta fatten them up :)
+	    darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$basename" | sort -u`
+	    darwin_file=
+	    darwin_files=
+	    for darwin_file in $darwin_filelist; do
+	      darwin_files=`find unfat-$$ -name $darwin_file -print | $NL2SP`
+	      $LIPO -create -output "$darwin_file" $darwin_files
+	    done # $darwin_filelist
+	    $RM -rf unfat-$$
+	    cd "$darwin_orig_dir"
+	  else
+	    cd $darwin_orig_dir
+	    func_extract_an_archive "$my_xdir" "$my_xabs"
+	  fi # $darwin_arches
+	} # !$opt_dry_run
+	;;
+      *)
+        func_extract_an_archive "$my_xdir" "$my_xabs"
+	;;
+      esac
+      my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | $NL2SP`
+    done
+
+    func_extract_archives_result="$my_oldobjs"
+}
+
+
+
+# func_emit_wrapper_part1 [arg=no]
+#
+# Emit the first part of a libtool wrapper script on stdout.
+# For more information, see the description associated with
+# func_emit_wrapper(), below.
+func_emit_wrapper_part1 ()
+{
+	func_emit_wrapper_part1_arg1=no
+	if test -n "$1" ; then
+	  func_emit_wrapper_part1_arg1=$1
+	fi
+
+	$ECHO "\
+#! $SHELL
+
+# $output - temporary wrapper script for $objdir/$outputname
+# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION
+#
+# The $output program cannot be directly executed until all the libtool
+# libraries that it depends on are installed.
+#
+# This wrapper script should never be moved out of the build directory.
+# If it is, it will not operate correctly.
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+Xsed='${SED} -e 1s/^X//'
+sed_quote_subst='$sed_quote_subst'
+
+# Be Bourne compatible
+if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '\${1+\"\$@\"}'='\"\$@\"'
+  setopt NO_GLOB_SUBST
+else
+  case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac
+fi
+BIN_SH=xpg4; export BIN_SH # for Tru64
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+relink_command=\"$relink_command\"
+
+# This environment variable determines our operation mode.
+if test \"\$libtool_install_magic\" = \"$magic\"; then
+  # install mode needs the following variables:
+  generated_by_libtool_version='$macro_version'
+  notinst_deplibs='$notinst_deplibs'
+else
+  # When we are sourced in execute mode, \$file and \$ECHO are already set.
+  if test \"\$libtool_execute_magic\" != \"$magic\"; then
+    ECHO=\"$qecho\"
+    file=\"\$0\"
+    # Make sure echo works.
+    if test \"X\$1\" = X--no-reexec; then
+      # Discard the --no-reexec flag, and continue.
+      shift
+    elif test \"X\`{ \$ECHO '\t'; } 2>/dev/null\`\" = 'X\t'; then
+      # Yippee, \$ECHO works!
+      :
+    else
+      # Restart under the correct shell, and then maybe \$ECHO will work.
+      exec $SHELL \"\$0\" --no-reexec \${1+\"\$@\"}
+    fi
+  fi\
+"
+	$ECHO "\
+
+  # Find the directory that this script lives in.
+  thisdir=\`\$ECHO \"X\$file\" | \$Xsed -e 's%/[^/]*$%%'\`
+  test \"x\$thisdir\" = \"x\$file\" && thisdir=.
+
+  # Follow symbolic links until we get to the real thisdir.
+  file=\`ls -ld \"\$file\" | ${SED} -n 's/.*-> //p'\`
+  while test -n \"\$file\"; do
+    destdir=\`\$ECHO \"X\$file\" | \$Xsed -e 's%/[^/]*\$%%'\`
+
+    # If there was a directory component, then change thisdir.
+    if test \"x\$destdir\" != \"x\$file\"; then
+      case \"\$destdir\" in
+      [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;;
+      *) thisdir=\"\$thisdir/\$destdir\" ;;
+      esac
+    fi
+
+    file=\`\$ECHO \"X\$file\" | \$Xsed -e 's%^.*/%%'\`
+    file=\`ls -ld \"\$thisdir/\$file\" | ${SED} -n 's/.*-> //p'\`
+  done
+"
+}
+# end: func_emit_wrapper_part1
+
+# func_emit_wrapper_part2 [arg=no]
+#
+# Emit the second part of a libtool wrapper script on stdout.
+# For more information, see the description associated with
+# func_emit_wrapper(), below.
+func_emit_wrapper_part2 ()
+{
+	func_emit_wrapper_part2_arg1=no
+	if test -n "$1" ; then
+	  func_emit_wrapper_part2_arg1=$1
+	fi
+
+	$ECHO "\
+
+  # Usually 'no', except on cygwin/mingw when embedded into
+  # the cwrapper.
+  WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_part2_arg1
+  if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then
+    # special case for '.'
+    if test \"\$thisdir\" = \".\"; then
+      thisdir=\`pwd\`
+    fi
+    # remove .libs from thisdir
+    case \"\$thisdir\" in
+    *[\\\\/]$objdir ) thisdir=\`\$ECHO \"X\$thisdir\" | \$Xsed -e 's%[\\\\/][^\\\\/]*$%%'\` ;;
+    $objdir )   thisdir=. ;;
+    esac
+  fi
+
+  # Try to get the absolute directory name.
+  absdir=\`cd \"\$thisdir\" && pwd\`
+  test -n \"\$absdir\" && thisdir=\"\$absdir\"
+"
+
+	if test "$fast_install" = yes; then
+	  $ECHO "\
+  program=lt-'$outputname'$exeext
+  progdir=\"\$thisdir/$objdir\"
+
+  if test ! -f \"\$progdir/\$program\" ||
+     { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | ${SED} 1q\`; \\
+       test \"X\$file\" != \"X\$progdir/\$program\"; }; then
+
+    file=\"\$\$-\$program\"
+
+    if test ! -d \"\$progdir\"; then
+      $MKDIR \"\$progdir\"
+    else
+      $RM \"\$progdir/\$file\"
+    fi"
+
+	  $ECHO "\
+
+    # relink executable if necessary
+    if test -n \"\$relink_command\"; then
+      if relink_command_output=\`eval \$relink_command 2>&1\`; then :
+      else
+	$ECHO \"\$relink_command_output\" >&2
+	$RM \"\$progdir/\$file\"
+	exit 1
+      fi
+    fi
+
+    $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null ||
+    { $RM \"\$progdir/\$program\";
+      $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; }
+    $RM \"\$progdir/\$file\"
+  fi"
+	else
+	  $ECHO "\
+  program='$outputname'
+  progdir=\"\$thisdir/$objdir\"
+"
+	fi
+
+	$ECHO "\
+
+  if test -f \"\$progdir/\$program\"; then"
+
+	# Export our shlibpath_var if we have one.
+	if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then
+	  $ECHO "\
+    # Add our own library path to $shlibpath_var
+    $shlibpath_var=\"$temp_rpath\$$shlibpath_var\"
+
+    # Some systems cannot cope with colon-terminated $shlibpath_var
+    # The second colon is a workaround for a bug in BeOS R4 sed
+    $shlibpath_var=\`\$ECHO \"X\$$shlibpath_var\" | \$Xsed -e 's/::*\$//'\`
+
+    export $shlibpath_var
+"
+	fi
+
+	# fixup the dll searchpath if we need to.
+	if test -n "$dllsearchpath"; then
+	  $ECHO "\
+    # Add the dll search path components to the executable PATH
+    PATH=$dllsearchpath:\$PATH
+"
+	fi
+
+	$ECHO "\
+    if test \"\$libtool_execute_magic\" != \"$magic\"; then
+      # Run the actual program with our arguments.
+"
+	case $host in
+	# Backslashes separate directories on plain windows
+	*-*-mingw | *-*-os2* | *-cegcc*)
+	  $ECHO "\
+      exec \"\$progdir\\\\\$program\" \${1+\"\$@\"}
+"
+	  ;;
+
+	*)
+	  $ECHO "\
+      exec \"\$progdir/\$program\" \${1+\"\$@\"}
+"
+	  ;;
+	esac
+	$ECHO "\
+      \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2
+      exit 1
+    fi
+  else
+    # The program doesn't exist.
+    \$ECHO \"\$0: error: \\\`\$progdir/\$program' does not exist\" 1>&2
+    \$ECHO \"This script is just a wrapper for \$program.\" 1>&2
+    $ECHO \"See the $PACKAGE documentation for more information.\" 1>&2
+    exit 1
+  fi
+fi\
+"
+}
+# end: func_emit_wrapper_part2
+
+
+# func_emit_wrapper [arg=no]
+#
+# Emit a libtool wrapper script on stdout.
+# Don't directly open a file because we may want to
+# incorporate the script contents within a cygwin/mingw
+# wrapper executable.  Must ONLY be called from within
+# func_mode_link because it depends on a number of variables
+# set therein.
+#
+# ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR
+# variable will take.  If 'yes', then the emitted script
+# will assume that the directory in which it is stored is
+# the $objdir directory.  This is a cygwin/mingw-specific
+# behavior.
+func_emit_wrapper ()
+{
+	func_emit_wrapper_arg1=no
+	if test -n "$1" ; then
+	  func_emit_wrapper_arg1=$1
+	fi
+
+	# split this up so that func_emit_cwrapperexe_src
+	# can call each part independently.
+	func_emit_wrapper_part1 "${func_emit_wrapper_arg1}"
+	func_emit_wrapper_part2 "${func_emit_wrapper_arg1}"
+}
+
+
+# func_to_host_path arg
+#
+# Convert paths to host format when used with build tools.
+# Intended for use with "native" mingw (where libtool itself
+# is running under the msys shell), or in the following cross-
+# build environments:
+#    $build          $host
+#    mingw (msys)    mingw  [e.g. native]
+#    cygwin          mingw
+#    *nix + wine     mingw
+# where wine is equipped with the `winepath' executable.
+# In the native mingw case, the (msys) shell automatically
+# converts paths for any non-msys applications it launches,
+# but that facility isn't available from inside the cwrapper.
+# Similar accommodations are necessary for $host mingw and
+# $build cygwin.  Calling this function does no harm for other
+# $host/$build combinations not listed above.
+#
+# ARG is the path (on $build) that should be converted to
+# the proper representation for $host. The result is stored
+# in $func_to_host_path_result.
+func_to_host_path ()
+{
+  func_to_host_path_result="$1"
+  if test -n "$1" ; then
+    case $host in
+      *mingw* )
+        lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'
+        case $build in
+          *mingw* ) # actually, msys
+            # awkward: cmd appends spaces to result
+            lt_sed_strip_trailing_spaces="s/[ ]*\$//"
+            func_to_host_path_tmp1=`( cmd //c echo "$1" |\
+              $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""`
+            func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\
+              $SED -e "$lt_sed_naive_backslashify"`
+            ;;
+          *cygwin* )
+            func_to_host_path_tmp1=`cygpath -w "$1"`
+            func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\
+              $SED -e "$lt_sed_naive_backslashify"`
+            ;;
+          * )
+            # Unfortunately, winepath does not exit with a non-zero
+            # error code, so we are forced to check the contents of
+            # stdout. On the other hand, if the command is not
+            # found, the shell will set an exit code of 127 and print
+            # *an error message* to stdout. So we must check for both
+            # error code of zero AND non-empty stdout, which explains
+            # the odd construction:
+            func_to_host_path_tmp1=`winepath -w "$1" 2>/dev/null`
+            if test "$?" -eq 0 && test -n "${func_to_host_path_tmp1}"; then
+              func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\
+                $SED -e "$lt_sed_naive_backslashify"`
+            else
+              # Allow warning below.
+              func_to_host_path_result=""
+            fi
+            ;;
+        esac
+        if test -z "$func_to_host_path_result" ; then
+          func_error "Could not determine host path corresponding to"
+          func_error "  '$1'"
+          func_error "Continuing, but uninstalled executables may not work."
+          # Fallback:
+          func_to_host_path_result="$1"
+        fi
+        ;;
+    esac
+  fi
+}
+# end: func_to_host_path
+
+# func_to_host_pathlist arg
+#
+# Convert pathlists to host format when used with build tools.
+# See func_to_host_path(), above. This function supports the
+# following $build/$host combinations (but does no harm for
+# combinations not listed here):
+#    $build          $host
+#    mingw (msys)    mingw  [e.g. native]
+#    cygwin          mingw
+#    *nix + wine     mingw
+#
+# Path separators are also converted from $build format to
+# $host format. If ARG begins or ends with a path separator
+# character, it is preserved (but converted to $host format)
+# on output.
+#
+# ARG is a pathlist (on $build) that should be converted to
+# the proper representation on $host. The result is stored
+# in $func_to_host_pathlist_result.
+func_to_host_pathlist ()
+{
+  func_to_host_pathlist_result="$1"
+  if test -n "$1" ; then
+    case $host in
+      *mingw* )
+        lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'
+        # Remove leading and trailing path separator characters from
+        # ARG. msys behavior is inconsistent here, cygpath turns them
+        # into '.;' and ';.', and winepath ignores them completely.
+        func_to_host_pathlist_tmp2="$1"
+        # Once set for this call, this variable should not be
+        # reassigned. It is used in tha fallback case.
+        func_to_host_pathlist_tmp1=`echo "$func_to_host_pathlist_tmp2" |\
+          $SED -e 's|^:*||' -e 's|:*$||'`
+        case $build in
+          *mingw* ) # Actually, msys.
+            # Awkward: cmd appends spaces to result.
+            lt_sed_strip_trailing_spaces="s/[ ]*\$//"
+            func_to_host_pathlist_tmp2=`( cmd //c echo "$func_to_host_pathlist_tmp1" |\
+              $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""`
+            func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\
+              $SED -e "$lt_sed_naive_backslashify"`
+            ;;
+          *cygwin* )
+            func_to_host_pathlist_tmp2=`cygpath -w -p "$func_to_host_pathlist_tmp1"`
+            func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\
+              $SED -e "$lt_sed_naive_backslashify"`
+            ;;
+          * )
+            # unfortunately, winepath doesn't convert pathlists
+            func_to_host_pathlist_result=""
+            func_to_host_pathlist_oldIFS=$IFS
+            IFS=:
+            for func_to_host_pathlist_f in $func_to_host_pathlist_tmp1 ; do
+              IFS=$func_to_host_pathlist_oldIFS
+              if test -n "$func_to_host_pathlist_f" ; then
+                func_to_host_path "$func_to_host_pathlist_f"
+                if test -n "$func_to_host_path_result" ; then
+                  if test -z "$func_to_host_pathlist_result" ; then
+                    func_to_host_pathlist_result="$func_to_host_path_result"
+                  else
+                    func_to_host_pathlist_result="$func_to_host_pathlist_result;$func_to_host_path_result"
+                  fi
+                fi
+              fi
+              IFS=:
+            done
+            IFS=$func_to_host_pathlist_oldIFS
+            ;;
+        esac
+        if test -z "$func_to_host_pathlist_result" ; then
+          func_error "Could not determine the host path(s) corresponding to"
+          func_error "  '$1'"
+          func_error "Continuing, but uninstalled executables may not work."
+          # Fallback. This may break if $1 contains DOS-style drive
+          # specifications. The fix is not to complicate the expression
+          # below, but for the user to provide a working wine installation
+          # with winepath so that path translation in the cross-to-mingw
+          # case works properly.
+          lt_replace_pathsep_nix_to_dos="s|:|;|g"
+          func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp1" |\
+            $SED -e "$lt_replace_pathsep_nix_to_dos"`
+        fi
+        # Now, add the leading and trailing path separators back
+        case "$1" in
+          :* ) func_to_host_pathlist_result=";$func_to_host_pathlist_result"
+            ;;
+        esac
+        case "$1" in
+          *: ) func_to_host_pathlist_result="$func_to_host_pathlist_result;"
+            ;;
+        esac
+        ;;
+    esac
+  fi
+}
+# end: func_to_host_pathlist
+
+# func_emit_cwrapperexe_src
+# emit the source code for a wrapper executable on stdout
+# Must ONLY be called from within func_mode_link because
+# it depends on a number of variable set therein.
+func_emit_cwrapperexe_src ()
+{
+	cat <<EOF
+
+/* $cwrappersource - temporary wrapper executable for $objdir/$outputname
+   Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION
+
+   The $output program cannot be directly executed until all the libtool
+   libraries that it depends on are installed.
+
+   This wrapper executable should never be moved out of the build directory.
+   If it is, it will not operate correctly.
+
+   Currently, it simply execs the wrapper *script* "$SHELL $output",
+   but could eventually absorb all of the scripts functionality and
+   exec $objdir/$outputname directly.
+*/
+EOF
+	    cat <<"EOF"
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef _MSC_VER
+# include <direct.h>
+# include <process.h>
+# include <io.h>
+# define setmode _setmode
+#else
+# include <unistd.h>
+# include <stdint.h>
+# ifdef __CYGWIN__
+#  include <io.h>
+#  define HAVE_SETENV
+#  ifdef __STRICT_ANSI__
+char *realpath (const char *, char *);
+int putenv (char *);
+int setenv (const char *, const char *, int);
+#  endif
+# endif
+#endif
+#include <malloc.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#if defined(PATH_MAX)
+# define LT_PATHMAX PATH_MAX
+#elif defined(MAXPATHLEN)
+# define LT_PATHMAX MAXPATHLEN
+#else
+# define LT_PATHMAX 1024
+#endif
+
+#ifndef S_IXOTH
+# define S_IXOTH 0
+#endif
+#ifndef S_IXGRP
+# define S_IXGRP 0
+#endif
+
+#ifdef _MSC_VER
+# define S_IXUSR _S_IEXEC
+# define stat _stat
+# ifndef _INTPTR_T_DEFINED
+#  define intptr_t int
+# endif
+#endif
+
+#ifndef DIR_SEPARATOR
+# define DIR_SEPARATOR '/'
+# define PATH_SEPARATOR ':'
+#endif
+
+#if defined (_WIN32) || defined (__MSDOS__) || defined (__DJGPP__) || \
+  defined (__OS2__)
+# define HAVE_DOS_BASED_FILE_SYSTEM
+# define FOPEN_WB "wb"
+# ifndef DIR_SEPARATOR_2
+#  define DIR_SEPARATOR_2 '\\'
+# endif
+# ifndef PATH_SEPARATOR_2
+#  define PATH_SEPARATOR_2 ';'
+# endif
+#endif
+
+#ifndef DIR_SEPARATOR_2
+# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
+#else /* DIR_SEPARATOR_2 */
+# define IS_DIR_SEPARATOR(ch) \
+	(((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
+#endif /* DIR_SEPARATOR_2 */
+
+#ifndef PATH_SEPARATOR_2
+# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR)
+#else /* PATH_SEPARATOR_2 */
+# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2)
+#endif /* PATH_SEPARATOR_2 */
+
+#ifdef __CYGWIN__
+# define FOPEN_WB "wb"
+#endif
+
+#ifndef FOPEN_WB
+# define FOPEN_WB "w"
+#endif
+#ifndef _O_BINARY
+# define _O_BINARY 0
+#endif
+
+#define XMALLOC(type, num)      ((type *) xmalloc ((num) * sizeof(type)))
+#define XFREE(stale) do { \
+  if (stale) { free ((void *) stale); stale = 0; } \
+} while (0)
+
+#undef LTWRAPPER_DEBUGPRINTF
+#if defined DEBUGWRAPPER
+# define LTWRAPPER_DEBUGPRINTF(args) ltwrapper_debugprintf args
+static void
+ltwrapper_debugprintf (const char *fmt, ...)
+{
+    va_list args;
+    va_start (args, fmt);
+    (void) vfprintf (stderr, fmt, args);
+    va_end (args);
+}
+#else
+# define LTWRAPPER_DEBUGPRINTF(args)
+#endif
+
+const char *program_name = NULL;
+
+void *xmalloc (size_t num);
+char *xstrdup (const char *string);
+const char *base_name (const char *name);
+char *find_executable (const char *wrapper);
+char *chase_symlinks (const char *pathspec);
+int make_executable (const char *path);
+int check_executable (const char *path);
+char *strendzap (char *str, const char *pat);
+void lt_fatal (const char *message, ...);
+void lt_setenv (const char *name, const char *value);
+char *lt_extend_str (const char *orig_value, const char *add, int to_end);
+void lt_opt_process_env_set (const char *arg);
+void lt_opt_process_env_prepend (const char *arg);
+void lt_opt_process_env_append (const char *arg);
+int lt_split_name_value (const char *arg, char** name, char** value);
+void lt_update_exe_path (const char *name, const char *value);
+void lt_update_lib_path (const char *name, const char *value);
+
+static const char *script_text_part1 =
+EOF
+
+	    func_emit_wrapper_part1 yes |
+	        $SED -e 's/\([\\"]\)/\\\1/g' \
+	             -e 's/^/  "/' -e 's/$/\\n"/'
+	    echo ";"
+	    cat <<EOF
+
+static const char *script_text_part2 =
+EOF
+	    func_emit_wrapper_part2 yes |
+	        $SED -e 's/\([\\"]\)/\\\1/g' \
+	             -e 's/^/  "/' -e 's/$/\\n"/'
+	    echo ";"
+
+	    cat <<EOF
+const char * MAGIC_EXE = "$magic_exe";
+const char * LIB_PATH_VARNAME = "$shlibpath_var";
+EOF
+
+	    if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then
+              func_to_host_pathlist "$temp_rpath"
+	      cat <<EOF
+const char * LIB_PATH_VALUE   = "$func_to_host_pathlist_result";
+EOF
+	    else
+	      cat <<"EOF"
+const char * LIB_PATH_VALUE   = "";
+EOF
+	    fi
+
+	    if test -n "$dllsearchpath"; then
+              func_to_host_pathlist "$dllsearchpath:"
+	      cat <<EOF
+const char * EXE_PATH_VARNAME = "PATH";
+const char * EXE_PATH_VALUE   = "$func_to_host_pathlist_result";
+EOF
+	    else
+	      cat <<"EOF"
+const char * EXE_PATH_VARNAME = "";
+const char * EXE_PATH_VALUE   = "";
+EOF
+	    fi
+
+	    if test "$fast_install" = yes; then
+	      cat <<EOF
+const char * TARGET_PROGRAM_NAME = "lt-$outputname"; /* hopefully, no .exe */
+EOF
+	    else
+	      cat <<EOF
+const char * TARGET_PROGRAM_NAME = "$outputname"; /* hopefully, no .exe */
+EOF
+	    fi
+
+
+	    cat <<"EOF"
+
+#define LTWRAPPER_OPTION_PREFIX         "--lt-"
+#define LTWRAPPER_OPTION_PREFIX_LENGTH  5
+
+static const size_t opt_prefix_len         = LTWRAPPER_OPTION_PREFIX_LENGTH;
+static const char *ltwrapper_option_prefix = LTWRAPPER_OPTION_PREFIX;
+
+static const char *dumpscript_opt       = LTWRAPPER_OPTION_PREFIX "dump-script";
+
+static const size_t env_set_opt_len     = LTWRAPPER_OPTION_PREFIX_LENGTH + 7;
+static const char *env_set_opt          = LTWRAPPER_OPTION_PREFIX "env-set";
+  /* argument is putenv-style "foo=bar", value of foo is set to bar */
+
+static const size_t env_prepend_opt_len = LTWRAPPER_OPTION_PREFIX_LENGTH + 11;
+static const char *env_prepend_opt      = LTWRAPPER_OPTION_PREFIX "env-prepend";
+  /* argument is putenv-style "foo=bar", new value of foo is bar${foo} */
+
+static const size_t env_append_opt_len  = LTWRAPPER_OPTION_PREFIX_LENGTH + 10;
+static const char *env_append_opt       = LTWRAPPER_OPTION_PREFIX "env-append";
+  /* argument is putenv-style "foo=bar", new value of foo is ${foo}bar */
+
+int
+main (int argc, char *argv[])
+{
+  char **newargz;
+  int  newargc;
+  char *tmp_pathspec;
+  char *actual_cwrapper_path;
+  char *actual_cwrapper_name;
+  char *target_name;
+  char *lt_argv_zero;
+  intptr_t rval = 127;
+
+  int i;
+
+  program_name = (char *) xstrdup (base_name (argv[0]));
+  LTWRAPPER_DEBUGPRINTF (("(main) argv[0]      : %s\n", argv[0]));
+  LTWRAPPER_DEBUGPRINTF (("(main) program_name : %s\n", program_name));
+
+  /* very simple arg parsing; don't want to rely on getopt */
+  for (i = 1; i < argc; i++)
+    {
+      if (strcmp (argv[i], dumpscript_opt) == 0)
+	{
+EOF
+	    case "$host" in
+	      *mingw* | *cygwin* )
+		# make stdout use "unix" line endings
+		echo "          setmode(1,_O_BINARY);"
+		;;
+	      esac
+
+	    cat <<"EOF"
+	  printf ("%s", script_text_part1);
+	  printf ("%s", script_text_part2);
+	  return 0;
+	}
+    }
+
+  newargz = XMALLOC (char *, argc + 1);
+  tmp_pathspec = find_executable (argv[0]);
+  if (tmp_pathspec == NULL)
+    lt_fatal ("Couldn't find %s", argv[0]);
+  LTWRAPPER_DEBUGPRINTF (("(main) found exe (before symlink chase) at : %s\n",
+			  tmp_pathspec));
+
+  actual_cwrapper_path = chase_symlinks (tmp_pathspec);
+  LTWRAPPER_DEBUGPRINTF (("(main) found exe (after symlink chase) at : %s\n",
+			  actual_cwrapper_path));
+  XFREE (tmp_pathspec);
+
+  actual_cwrapper_name = xstrdup( base_name (actual_cwrapper_path));
+  strendzap (actual_cwrapper_path, actual_cwrapper_name);
+
+  /* wrapper name transforms */
+  strendzap (actual_cwrapper_name, ".exe");
+  tmp_pathspec = lt_extend_str (actual_cwrapper_name, ".exe", 1);
+  XFREE (actual_cwrapper_name);
+  actual_cwrapper_name = tmp_pathspec;
+  tmp_pathspec = 0;
+
+  /* target_name transforms -- use actual target program name; might have lt- prefix */
+  target_name = xstrdup (base_name (TARGET_PROGRAM_NAME));
+  strendzap (target_name, ".exe");
+  tmp_pathspec = lt_extend_str (target_name, ".exe", 1);
+  XFREE (target_name);
+  target_name = tmp_pathspec;
+  tmp_pathspec = 0;
+
+  LTWRAPPER_DEBUGPRINTF (("(main) libtool target name: %s\n",
+			  target_name));
+EOF
+
+	    cat <<EOF
+  newargz[0] =
+    XMALLOC (char, (strlen (actual_cwrapper_path) +
+		    strlen ("$objdir") + 1 + strlen (actual_cwrapper_name) + 1));
+  strcpy (newargz[0], actual_cwrapper_path);
+  strcat (newargz[0], "$objdir");
+  strcat (newargz[0], "/");
+EOF
+
+	    cat <<"EOF"
+  /* stop here, and copy so we don't have to do this twice */
+  tmp_pathspec = xstrdup (newargz[0]);
+
+  /* do NOT want the lt- prefix here, so use actual_cwrapper_name */
+  strcat (newargz[0], actual_cwrapper_name);
+
+  /* DO want the lt- prefix here if it exists, so use target_name */
+  lt_argv_zero = lt_extend_str (tmp_pathspec, target_name, 1);
+  XFREE (tmp_pathspec);
+  tmp_pathspec = NULL;
+EOF
+
+	    case $host_os in
+	      mingw*)
+	    cat <<"EOF"
+  {
+    char* p;
+    while ((p = strchr (newargz[0], '\\')) != NULL)
+      {
+	*p = '/';
+      }
+    while ((p = strchr (lt_argv_zero, '\\')) != NULL)
+      {
+	*p = '/';
+      }
+  }
+EOF
+	    ;;
+	    esac
+
+	    cat <<"EOF"
+  XFREE (target_name);
+  XFREE (actual_cwrapper_path);
+  XFREE (actual_cwrapper_name);
+
+  lt_setenv ("BIN_SH", "xpg4"); /* for Tru64 */
+  lt_setenv ("DUALCASE", "1");  /* for MSK sh */
+  lt_update_lib_path (LIB_PATH_VARNAME, LIB_PATH_VALUE);
+  lt_update_exe_path (EXE_PATH_VARNAME, EXE_PATH_VALUE);
+
+  newargc=0;
+  for (i = 1; i < argc; i++)
+    {
+      if (strncmp (argv[i], env_set_opt, env_set_opt_len) == 0)
+        {
+          if (argv[i][env_set_opt_len] == '=')
+            {
+              const char *p = argv[i] + env_set_opt_len + 1;
+              lt_opt_process_env_set (p);
+            }
+          else if (argv[i][env_set_opt_len] == '\0' && i + 1 < argc)
+            {
+              lt_opt_process_env_set (argv[++i]); /* don't copy */
+            }
+          else
+            lt_fatal ("%s missing required argument", env_set_opt);
+          continue;
+        }
+      if (strncmp (argv[i], env_prepend_opt, env_prepend_opt_len) == 0)
+        {
+          if (argv[i][env_prepend_opt_len] == '=')
+            {
+              const char *p = argv[i] + env_prepend_opt_len + 1;
+              lt_opt_process_env_prepend (p);
+            }
+          else if (argv[i][env_prepend_opt_len] == '\0' && i + 1 < argc)
+            {
+              lt_opt_process_env_prepend (argv[++i]); /* don't copy */
+            }
+          else
+            lt_fatal ("%s missing required argument", env_prepend_opt);
+          continue;
+        }
+      if (strncmp (argv[i], env_append_opt, env_append_opt_len) == 0)
+        {
+          if (argv[i][env_append_opt_len] == '=')
+            {
+              const char *p = argv[i] + env_append_opt_len + 1;
+              lt_opt_process_env_append (p);
+            }
+          else if (argv[i][env_append_opt_len] == '\0' && i + 1 < argc)
+            {
+              lt_opt_process_env_append (argv[++i]); /* don't copy */
+            }
+          else
+            lt_fatal ("%s missing required argument", env_append_opt);
+          continue;
+        }
+      if (strncmp (argv[i], ltwrapper_option_prefix, opt_prefix_len) == 0)
+        {
+          /* however, if there is an option in the LTWRAPPER_OPTION_PREFIX
+             namespace, but it is not one of the ones we know about and
+             have already dealt with, above (inluding dump-script), then
+             report an error. Otherwise, targets might begin to believe
+             they are allowed to use options in the LTWRAPPER_OPTION_PREFIX
+             namespace. The first time any user complains about this, we'll
+             need to make LTWRAPPER_OPTION_PREFIX a configure-time option
+             or a configure.ac-settable value.
+           */
+          lt_fatal ("Unrecognized option in %s namespace: '%s'",
+                    ltwrapper_option_prefix, argv[i]);
+        }
+      /* otherwise ... */
+      newargz[++newargc] = xstrdup (argv[i]);
+    }
+  newargz[++newargc] = NULL;
+
+  LTWRAPPER_DEBUGPRINTF     (("(main) lt_argv_zero : %s\n", (lt_argv_zero ? lt_argv_zero : "<NULL>")));
+  for (i = 0; i < newargc; i++)
+    {
+      LTWRAPPER_DEBUGPRINTF (("(main) newargz[%d]   : %s\n", i, (newargz[i] ? newargz[i] : "<NULL>")));
+    }
+
+EOF
+
+	    case $host_os in
+	      mingw*)
+		cat <<"EOF"
+  /* execv doesn't actually work on mingw as expected on unix */
+  rval = _spawnv (_P_WAIT, lt_argv_zero, (const char * const *) newargz);
+  if (rval == -1)
+    {
+      /* failed to start process */
+      LTWRAPPER_DEBUGPRINTF (("(main) failed to launch target \"%s\": errno = %d\n", lt_argv_zero, errno));
+      return 127;
+    }
+  return rval;
+EOF
+		;;
+	      *)
+		cat <<"EOF"
+  execv (lt_argv_zero, newargz);
+  return rval; /* =127, but avoids unused variable warning */
+EOF
+		;;
+	    esac
+
+	    cat <<"EOF"
+}
+
+void *
+xmalloc (size_t num)
+{
+  void *p = (void *) malloc (num);
+  if (!p)
+    lt_fatal ("Memory exhausted");
+
+  return p;
+}
+
+char *
+xstrdup (const char *string)
+{
+  return string ? strcpy ((char *) xmalloc (strlen (string) + 1),
+			  string) : NULL;
+}
+
+const char *
+base_name (const char *name)
+{
+  const char *base;
+
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
+  /* Skip over the disk name in MSDOS pathnames. */
+  if (isalpha ((unsigned char) name[0]) && name[1] == ':')
+    name += 2;
+#endif
+
+  for (base = name; *name; name++)
+    if (IS_DIR_SEPARATOR (*name))
+      base = name + 1;
+  return base;
+}
+
+int
+check_executable (const char *path)
+{
+  struct stat st;
+
+  LTWRAPPER_DEBUGPRINTF (("(check_executable)  : %s\n",
+			  path ? (*path ? path : "EMPTY!") : "NULL!"));
+  if ((!path) || (!*path))
+    return 0;
+
+  if ((stat (path, &st) >= 0)
+      && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
+    return 1;
+  else
+    return 0;
+}
+
+int
+make_executable (const char *path)
+{
+  int rval = 0;
+  struct stat st;
+
+  LTWRAPPER_DEBUGPRINTF (("(make_executable)   : %s\n",
+			  path ? (*path ? path : "EMPTY!") : "NULL!"));
+  if ((!path) || (!*path))
+    return 0;
+
+  if (stat (path, &st) >= 0)
+    {
+      rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR);
+    }
+  return rval;
+}
+
+/* Searches for the full path of the wrapper.  Returns
+   newly allocated full path name if found, NULL otherwise
+   Does not chase symlinks, even on platforms that support them.
+*/
+char *
+find_executable (const char *wrapper)
+{
+  int has_slash = 0;
+  const char *p;
+  const char *p_next;
+  /* static buffer for getcwd */
+  char tmp[LT_PATHMAX + 1];
+  int tmp_len;
+  char *concat_name;
+
+  LTWRAPPER_DEBUGPRINTF (("(find_executable)   : %s\n",
+			  wrapper ? (*wrapper ? wrapper : "EMPTY!") : "NULL!"));
+
+  if ((wrapper == NULL) || (*wrapper == '\0'))
+    return NULL;
+
+  /* Absolute path? */
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
+  if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':')
+    {
+      concat_name = xstrdup (wrapper);
+      if (check_executable (concat_name))
+	return concat_name;
+      XFREE (concat_name);
+    }
+  else
+    {
+#endif
+      if (IS_DIR_SEPARATOR (wrapper[0]))
+	{
+	  concat_name = xstrdup (wrapper);
+	  if (check_executable (concat_name))
+	    return concat_name;
+	  XFREE (concat_name);
+	}
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
+    }
+#endif
+
+  for (p = wrapper; *p; p++)
+    if (*p == '/')
+      {
+	has_slash = 1;
+	break;
+      }
+  if (!has_slash)
+    {
+      /* no slashes; search PATH */
+      const char *path = getenv ("PATH");
+      if (path != NULL)
+	{
+	  for (p = path; *p; p = p_next)
+	    {
+	      const char *q;
+	      size_t p_len;
+	      for (q = p; *q; q++)
+		if (IS_PATH_SEPARATOR (*q))
+		  break;
+	      p_len = q - p;
+	      p_next = (*q == '\0' ? q : q + 1);
+	      if (p_len == 0)
+		{
+		  /* empty path: current directory */
+		  if (getcwd (tmp, LT_PATHMAX) == NULL)
+		    lt_fatal ("getcwd failed");
+		  tmp_len = strlen (tmp);
+		  concat_name =
+		    XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1);
+		  memcpy (concat_name, tmp, tmp_len);
+		  concat_name[tmp_len] = '/';
+		  strcpy (concat_name + tmp_len + 1, wrapper);
+		}
+	      else
+		{
+		  concat_name =
+		    XMALLOC (char, p_len + 1 + strlen (wrapper) + 1);
+		  memcpy (concat_name, p, p_len);
+		  concat_name[p_len] = '/';
+		  strcpy (concat_name + p_len + 1, wrapper);
+		}
+	      if (check_executable (concat_name))
+		return concat_name;
+	      XFREE (concat_name);
+	    }
+	}
+      /* not found in PATH; assume curdir */
+    }
+  /* Relative path | not found in path: prepend cwd */
+  if (getcwd (tmp, LT_PATHMAX) == NULL)
+    lt_fatal ("getcwd failed");
+  tmp_len = strlen (tmp);
+  concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1);
+  memcpy (concat_name, tmp, tmp_len);
+  concat_name[tmp_len] = '/';
+  strcpy (concat_name + tmp_len + 1, wrapper);
+
+  if (check_executable (concat_name))
+    return concat_name;
+  XFREE (concat_name);
+  return NULL;
+}
+
+char *
+chase_symlinks (const char *pathspec)
+{
+#ifndef S_ISLNK
+  return xstrdup (pathspec);
+#else
+  char buf[LT_PATHMAX];
+  struct stat s;
+  char *tmp_pathspec = xstrdup (pathspec);
+  char *p;
+  int has_symlinks = 0;
+  while (strlen (tmp_pathspec) && !has_symlinks)
+    {
+      LTWRAPPER_DEBUGPRINTF (("checking path component for symlinks: %s\n",
+			      tmp_pathspec));
+      if (lstat (tmp_pathspec, &s) == 0)
+	{
+	  if (S_ISLNK (s.st_mode) != 0)
+	    {
+	      has_symlinks = 1;
+	      break;
+	    }
+
+	  /* search backwards for last DIR_SEPARATOR */
+	  p = tmp_pathspec + strlen (tmp_pathspec) - 1;
+	  while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p)))
+	    p--;
+	  if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p)))
+	    {
+	      /* no more DIR_SEPARATORS left */
+	      break;
+	    }
+	  *p = '\0';
+	}
+      else
+	{
+	  char *errstr = strerror (errno);
+	  lt_fatal ("Error accessing file %s (%s)", tmp_pathspec, errstr);
+	}
+    }
+  XFREE (tmp_pathspec);
+
+  if (!has_symlinks)
+    {
+      return xstrdup (pathspec);
+    }
+
+  tmp_pathspec = realpath (pathspec, buf);
+  if (tmp_pathspec == 0)
+    {
+      lt_fatal ("Could not follow symlinks for %s", pathspec);
+    }
+  return xstrdup (tmp_pathspec);
+#endif
+}
+
+char *
+strendzap (char *str, const char *pat)
+{
+  size_t len, patlen;
+
+  assert (str != NULL);
+  assert (pat != NULL);
+
+  len = strlen (str);
+  patlen = strlen (pat);
+
+  if (patlen <= len)
+    {
+      str += len - patlen;
+      if (strcmp (str, pat) == 0)
+	*str = '\0';
+    }
+  return str;
+}
+
+static void
+lt_error_core (int exit_status, const char *mode,
+	       const char *message, va_list ap)
+{
+  fprintf (stderr, "%s: %s: ", program_name, mode);
+  vfprintf (stderr, message, ap);
+  fprintf (stderr, ".\n");
+
+  if (exit_status >= 0)
+    exit (exit_status);
+}
+
+void
+lt_fatal (const char *message, ...)
+{
+  va_list ap;
+  va_start (ap, message);
+  lt_error_core (EXIT_FAILURE, "FATAL", message, ap);
+  va_end (ap);
+}
+
+void
+lt_setenv (const char *name, const char *value)
+{
+  LTWRAPPER_DEBUGPRINTF (("(lt_setenv) setting '%s' to '%s'\n",
+                          (name ? name : "<NULL>"),
+                          (value ? value : "<NULL>")));
+  {
+#ifdef HAVE_SETENV
+    /* always make a copy, for consistency with !HAVE_SETENV */
+    char *str = xstrdup (value);
+    setenv (name, str, 1);
+#else
+    int len = strlen (name) + 1 + strlen (value) + 1;
+    char *str = XMALLOC (char, len);
+    sprintf (str, "%s=%s", name, value);
+    if (putenv (str) != EXIT_SUCCESS)
+      {
+        XFREE (str);
+      }
+#endif
+  }
+}
+
+char *
+lt_extend_str (const char *orig_value, const char *add, int to_end)
+{
+  char *new_value;
+  if (orig_value && *orig_value)
+    {
+      int orig_value_len = strlen (orig_value);
+      int add_len = strlen (add);
+      new_value = XMALLOC (char, add_len + orig_value_len + 1);
+      if (to_end)
+        {
+          strcpy (new_value, orig_value);
+          strcpy (new_value + orig_value_len, add);
+        }
+      else
+        {
+          strcpy (new_value, add);
+          strcpy (new_value + add_len, orig_value);
+        }
+    }
+  else
+    {
+      new_value = xstrdup (add);
+    }
+  return new_value;
+}
+
+int
+lt_split_name_value (const char *arg, char** name, char** value)
+{
+  const char *p;
+  int len;
+  if (!arg || !*arg)
+    return 1;
+
+  p = strchr (arg, (int)'=');
+
+  if (!p)
+    return 1;
+
+  *value = xstrdup (++p);
+
+  len = strlen (arg) - strlen (*value);
+  *name = XMALLOC (char, len);
+  strncpy (*name, arg, len-1);
+  (*name)[len - 1] = '\0';
+
+  return 0;
+}
+
+void
+lt_opt_process_env_set (const char *arg)
+{
+  char *name = NULL;
+  char *value = NULL;
+
+  if (lt_split_name_value (arg, &name, &value) != 0)
+    {
+      XFREE (name);
+      XFREE (value);
+      lt_fatal ("bad argument for %s: '%s'", env_set_opt, arg);
+    }
+
+  lt_setenv (name, value);
+  XFREE (name);
+  XFREE (value);
+}
+
+void
+lt_opt_process_env_prepend (const char *arg)
+{
+  char *name = NULL;
+  char *value = NULL;
+  char *new_value = NULL;
+
+  if (lt_split_name_value (arg, &name, &value) != 0)
+    {
+      XFREE (name);
+      XFREE (value);
+      lt_fatal ("bad argument for %s: '%s'", env_prepend_opt, arg);
+    }
+
+  new_value = lt_extend_str (getenv (name), value, 0);
+  lt_setenv (name, new_value);
+  XFREE (new_value);
+  XFREE (name);
+  XFREE (value);
+}
+
+void
+lt_opt_process_env_append (const char *arg)
+{
+  char *name = NULL;
+  char *value = NULL;
+  char *new_value = NULL;
+
+  if (lt_split_name_value (arg, &name, &value) != 0)
+    {
+      XFREE (name);
+      XFREE (value);
+      lt_fatal ("bad argument for %s: '%s'", env_append_opt, arg);
+    }
+
+  new_value = lt_extend_str (getenv (name), value, 1);
+  lt_setenv (name, new_value);
+  XFREE (new_value);
+  XFREE (name);
+  XFREE (value);
+}
+
+void
+lt_update_exe_path (const char *name, const char *value)
+{
+  LTWRAPPER_DEBUGPRINTF (("(lt_update_exe_path) modifying '%s' by prepending '%s'\n",
+                          (name ? name : "<NULL>"),
+                          (value ? value : "<NULL>")));
+
+  if (name && *name && value && *value)
+    {
+      char *new_value = lt_extend_str (getenv (name), value, 0);
+      /* some systems can't cope with a ':'-terminated path #' */
+      int len = strlen (new_value);
+      while (((len = strlen (new_value)) > 0) && IS_PATH_SEPARATOR (new_value[len-1]))
+        {
+          new_value[len-1] = '\0';
+        }
+      lt_setenv (name, new_value);
+      XFREE (new_value);
+    }
+}
+
+void
+lt_update_lib_path (const char *name, const char *value)
+{
+  LTWRAPPER_DEBUGPRINTF (("(lt_update_lib_path) modifying '%s' by prepending '%s'\n",
+                          (name ? name : "<NULL>"),
+                          (value ? value : "<NULL>")));
+
+  if (name && *name && value && *value)
+    {
+      char *new_value = lt_extend_str (getenv (name), value, 0);
+      lt_setenv (name, new_value);
+      XFREE (new_value);
+    }
+}
+
+
+EOF
+}
+# end: func_emit_cwrapperexe_src
+
+# func_mode_link arg...
+func_mode_link ()
+{
+    $opt_debug
+    case $host in
+    *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+      # It is impossible to link a dll without this setting, and
+      # we shouldn't force the makefile maintainer to figure out
+      # which system we are compiling for in order to pass an extra
+      # flag for every libtool invocation.
+      # allow_undefined=no
+
+      # FIXME: Unfortunately, there are problems with the above when trying
+      # to make a dll which has undefined symbols, in which case not
+      # even a static library is built.  For now, we need to specify
+      # -no-undefined on the libtool link line when we can be certain
+      # that all symbols are satisfied, otherwise we get a static library.
+      allow_undefined=yes
+      ;;
+    *)
+      allow_undefined=yes
+      ;;
+    esac
+    libtool_args=$nonopt
+    base_compile="$nonopt $@"
+    compile_command=$nonopt
+    finalize_command=$nonopt
+
+    compile_rpath=
+    finalize_rpath=
+    compile_shlibpath=
+    finalize_shlibpath=
+    convenience=
+    old_convenience=
+    deplibs=
+    old_deplibs=
+    compiler_flags=
+    linker_flags=
+    dllsearchpath=
+    lib_search_path=`pwd`
+    inst_prefix_dir=
+    new_inherited_linker_flags=
+
+    avoid_version=no
+    dlfiles=
+    dlprefiles=
+    dlself=no
+    export_dynamic=no
+    export_symbols=
+    export_symbols_regex=
+    generated=
+    libobjs=
+    ltlibs=
+    module=no
+    no_install=no
+    objs=
+    non_pic_objects=
+    precious_files_regex=
+    prefer_static_libs=no
+    preload=no
+    prev=
+    prevarg=
+    release=
+    rpath=
+    xrpath=
+    perm_rpath=
+    temp_rpath=
+    thread_safe=no
+    vinfo=
+    vinfo_number=no
+    weak_libs=
+    single_module="${wl}-single_module"
+    func_infer_tag $base_compile
+
+    # We need to know -static, to get the right output filenames.
+    for arg
+    do
+      case $arg in
+      -shared)
+	test "$build_libtool_libs" != yes && \
+	  func_fatal_configuration "can not build a shared library"
+	build_old_libs=no
+	break
+	;;
+      -all-static | -static | -static-libtool-libs)
+	case $arg in
+	-all-static)
+	  if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then
+	    func_warning "complete static linking is impossible in this configuration"
+	  fi
+	  if test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=yes
+	  ;;
+	-static)
+	  if test -z "$pic_flag" && test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=built
+	  ;;
+	-static-libtool-libs)
+	  if test -z "$pic_flag" && test -n "$link_static_flag"; then
+	    dlopen_self=$dlopen_self_static
+	  fi
+	  prefer_static_libs=yes
+	  ;;
+	esac
+	build_libtool_libs=no
+	build_old_libs=yes
+	break
+	;;
+      esac
+    done
+
+    # See if our shared archives depend on static archives.
+    test -n "$old_archive_from_new_cmds" && build_old_libs=yes
+
+    # Go through the arguments, transforming them on the way.
+    while test "$#" -gt 0; do
+      arg="$1"
+      shift
+      func_quote_for_eval "$arg"
+      qarg=$func_quote_for_eval_unquoted_result
+      func_append libtool_args " $func_quote_for_eval_result"
+
+      # If the previous option needs an argument, assign it.
+      if test -n "$prev"; then
+	case $prev in
+	output)
+	  func_append compile_command " @OUTPUT@"
+	  func_append finalize_command " @OUTPUT@"
+	  ;;
+	esac
+
+	case $prev in
+	dlfiles|dlprefiles)
+	  if test "$preload" = no; then
+	    # Add the symbol object into the linking commands.
+	    func_append compile_command " @SYMFILE@"
+	    func_append finalize_command " @SYMFILE@"
+	    preload=yes
+	  fi
+	  case $arg in
+	  *.la | *.lo) ;;  # We handle these cases below.
+	  force)
+	    if test "$dlself" = no; then
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  self)
+	    if test "$prev" = dlprefiles; then
+	      dlself=yes
+	    elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then
+	      dlself=yes
+	    else
+	      dlself=needless
+	      export_dynamic=yes
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  *)
+	    if test "$prev" = dlfiles; then
+	      dlfiles="$dlfiles $arg"
+	    else
+	      dlprefiles="$dlprefiles $arg"
+	    fi
+	    prev=
+	    continue
+	    ;;
+	  esac
+	  ;;
+	expsyms)
+	  export_symbols="$arg"
+	  test -f "$arg" \
+	    || func_fatal_error "symbol file \`$arg' does not exist"
+	  prev=
+	  continue
+	  ;;
+	expsyms_regex)
+	  export_symbols_regex="$arg"
+	  prev=
+	  continue
+	  ;;
+	framework)
+	  case $host in
+	    *-*-darwin*)
+	      case "$deplibs " in
+		*" $qarg.ltframework "*) ;;
+		*) deplibs="$deplibs $qarg.ltframework" # this is fixed later
+		   ;;
+	      esac
+	      ;;
+	  esac
+	  prev=
+	  continue
+	  ;;
+	inst_prefix)
+	  inst_prefix_dir="$arg"
+	  prev=
+	  continue
+	  ;;
+	objectlist)
+	  if test -f "$arg"; then
+	    save_arg=$arg
+	    moreargs=
+	    for fil in `cat "$save_arg"`
+	    do
+#	      moreargs="$moreargs $fil"
+	      arg=$fil
+	      # A libtool-controlled object.
+
+	      # Check to see that this really is a libtool object.
+	      if func_lalib_unsafe_p "$arg"; then
+		pic_object=
+		non_pic_object=
+
+		# Read the .lo file
+		func_source "$arg"
+
+		if test -z "$pic_object" ||
+		   test -z "$non_pic_object" ||
+		   test "$pic_object" = none &&
+		   test "$non_pic_object" = none; then
+		  func_fatal_error "cannot find name of object for \`$arg'"
+		fi
+
+		# Extract subdirectory from the argument.
+		func_dirname "$arg" "/" ""
+		xdir="$func_dirname_result"
+
+		if test "$pic_object" != none; then
+		  # Prepend the subdirectory the object is found in.
+		  pic_object="$xdir$pic_object"
+
+		  if test "$prev" = dlfiles; then
+		    if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then
+		      dlfiles="$dlfiles $pic_object"
+		      prev=
+		      continue
+		    else
+		      # If libtool objects are unsupported, then we need to preload.
+		      prev=dlprefiles
+		    fi
+		  fi
+
+		  # CHECK ME:  I think I busted this.  -Ossama
+		  if test "$prev" = dlprefiles; then
+		    # Preload the old-style object.
+		    dlprefiles="$dlprefiles $pic_object"
+		    prev=
+		  fi
+
+		  # A PIC object.
+		  func_append libobjs " $pic_object"
+		  arg="$pic_object"
+		fi
+
+		# Non-PIC object.
+		if test "$non_pic_object" != none; then
+		  # Prepend the subdirectory the object is found in.
+		  non_pic_object="$xdir$non_pic_object"
+
+		  # A standard non-PIC object
+		  func_append non_pic_objects " $non_pic_object"
+		  if test -z "$pic_object" || test "$pic_object" = none ; then
+		    arg="$non_pic_object"
+		  fi
+		else
+		  # If the PIC object exists, use it instead.
+		  # $xdir was prepended to $pic_object above.
+		  non_pic_object="$pic_object"
+		  func_append non_pic_objects " $non_pic_object"
+		fi
+	      else
+		# Only an error if not doing a dry-run.
+		if $opt_dry_run; then
+		  # Extract subdirectory from the argument.
+		  func_dirname "$arg" "/" ""
+		  xdir="$func_dirname_result"
+
+		  func_lo2o "$arg"
+		  pic_object=$xdir$objdir/$func_lo2o_result
+		  non_pic_object=$xdir$func_lo2o_result
+		  func_append libobjs " $pic_object"
+		  func_append non_pic_objects " $non_pic_object"
+	        else
+		  func_fatal_error "\`$arg' is not a valid libtool object"
+		fi
+	      fi
+	    done
+	  else
+	    func_fatal_error "link input file \`$arg' does not exist"
+	  fi
+	  arg=$save_arg
+	  prev=
+	  continue
+	  ;;
+	precious_regex)
+	  precious_files_regex="$arg"
+	  prev=
+	  continue
+	  ;;
+	release)
+	  release="-$arg"
+	  prev=
+	  continue
+	  ;;
+	rpath | xrpath)
+	  # We need an absolute path.
+	  case $arg in
+	  [\\/]* | [A-Za-z]:[\\/]*) ;;
+	  *)
+	    func_fatal_error "only absolute run-paths are allowed"
+	    ;;
+	  esac
+	  if test "$prev" = rpath; then
+	    case "$rpath " in
+	    *" $arg "*) ;;
+	    *) rpath="$rpath $arg" ;;
+	    esac
+	  else
+	    case "$xrpath " in
+	    *" $arg "*) ;;
+	    *) xrpath="$xrpath $arg" ;;
+	    esac
+	  fi
+	  prev=
+	  continue
+	  ;;
+	shrext)
+	  shrext_cmds="$arg"
+	  prev=
+	  continue
+	  ;;
+	weak)
+	  weak_libs="$weak_libs $arg"
+	  prev=
+	  continue
+	  ;;
+	xcclinker)
+	  linker_flags="$linker_flags $qarg"
+	  compiler_flags="$compiler_flags $qarg"
+	  prev=
+	  func_append compile_command " $qarg"
+	  func_append finalize_command " $qarg"
+	  continue
+	  ;;
+	xcompiler)
+	  compiler_flags="$compiler_flags $qarg"
+	  prev=
+	  func_append compile_command " $qarg"
+	  func_append finalize_command " $qarg"
+	  continue
+	  ;;
+	xlinker)
+	  linker_flags="$linker_flags $qarg"
+	  compiler_flags="$compiler_flags $wl$qarg"
+	  prev=
+	  func_append compile_command " $wl$qarg"
+	  func_append finalize_command " $wl$qarg"
+	  continue
+	  ;;
+	*)
+	  eval "$prev=\"\$arg\""
+	  prev=
+	  continue
+	  ;;
+	esac
+      fi # test -n "$prev"
+
+      prevarg="$arg"
+
+      case $arg in
+      -all-static)
+	if test -n "$link_static_flag"; then
+	  # See comment for -static flag below, for more details.
+	  func_append compile_command " $link_static_flag"
+	  func_append finalize_command " $link_static_flag"
+	fi
+	continue
+	;;
+
+      -allow-undefined)
+	# FIXME: remove this flag sometime in the future.
+	func_fatal_error "\`-allow-undefined' must not be used because it is the default"
+	;;
+
+      -avoid-version)
+	avoid_version=yes
+	continue
+	;;
+
+      -dlopen)
+	prev=dlfiles
+	continue
+	;;
+
+      -dlpreopen)
+	prev=dlprefiles
+	continue
+	;;
+
+      -export-dynamic)
+	export_dynamic=yes
+	continue
+	;;
+
+      -export-symbols | -export-symbols-regex)
+	if test -n "$export_symbols" || test -n "$export_symbols_regex"; then
+	  func_fatal_error "more than one -exported-symbols argument is not allowed"
+	fi
+	if test "X$arg" = "X-export-symbols"; then
+	  prev=expsyms
+	else
+	  prev=expsyms_regex
+	fi
+	continue
+	;;
+
+      -framework)
+	prev=framework
+	continue
+	;;
+
+      -inst-prefix-dir)
+	prev=inst_prefix
+	continue
+	;;
+
+      # The native IRIX linker understands -LANG:*, -LIST:* and -LNO:*
+      # so, if we see these flags be careful not to treat them like -L
+      -L[A-Z][A-Z]*:*)
+	case $with_gcc/$host in
+	no/*-*-irix* | /*-*-irix*)
+	  func_append compile_command " $arg"
+	  func_append finalize_command " $arg"
+	  ;;
+	esac
+	continue
+	;;
+
+      -L*)
+	func_stripname '-L' '' "$arg"
+	dir=$func_stripname_result
+	if test -z "$dir"; then
+	  if test "$#" -gt 0; then
+	    func_fatal_error "require no space between \`-L' and \`$1'"
+	  else
+	    func_fatal_error "need path for \`-L' option"
+	  fi
+	fi
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	*)
+	  absdir=`cd "$dir" && pwd`
+	  test -z "$absdir" && \
+	    func_fatal_error "cannot determine absolute directory name of \`$dir'"
+	  dir="$absdir"
+	  ;;
+	esac
+	case "$deplibs " in
+	*" -L$dir "*) ;;
+	*)
+	  deplibs="$deplibs -L$dir"
+	  lib_search_path="$lib_search_path $dir"
+	  ;;
+	esac
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+	  testbindir=`$ECHO "X$dir" | $Xsed -e 's*/lib$*/bin*'`
+	  case :$dllsearchpath: in
+	  *":$dir:"*) ;;
+	  ::) dllsearchpath=$dir;;
+	  *) dllsearchpath="$dllsearchpath:$dir";;
+	  esac
+	  case :$dllsearchpath: in
+	  *":$testbindir:"*) ;;
+	  ::) dllsearchpath=$testbindir;;
+	  *) dllsearchpath="$dllsearchpath:$testbindir";;
+	  esac
+	  ;;
+	esac
+	continue
+	;;
+
+      -l*)
+	if test "X$arg" = "X-lc" || test "X$arg" = "X-lm"; then
+	  case $host in
+	  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-beos* | *-cegcc*)
+	    # These systems don't actually have a C or math library (as such)
+	    continue
+	    ;;
+	  *-*-os2*)
+	    # These systems don't actually have a C library (as such)
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*)
+	    # Do not include libc due to us having libc/libc_r.
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  *-*-rhapsody* | *-*-darwin1.[012])
+	    # Rhapsody C and math libraries are in the System framework
+	    deplibs="$deplibs System.ltframework"
+	    continue
+	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  esac
+	elif test "X$arg" = "X-lc_r"; then
+	 case $host in
+	 *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*)
+	   # Do not include libc_r directly, use -pthread flag.
+	   continue
+	   ;;
+	 esac
+	fi
+	deplibs="$deplibs $arg"
+	continue
+	;;
+
+      -module)
+	module=yes
+	continue
+	;;
+
+      # Tru64 UNIX uses -model [arg] to determine the layout of C++
+      # classes, name mangling, and exception handling.
+      # Darwin uses the -arch flag to determine output architecture.
+      -model|-arch|-isysroot)
+	compiler_flags="$compiler_flags $arg"
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+	prev=xcompiler
+	continue
+	;;
+
+      -mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
+	compiler_flags="$compiler_flags $arg"
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+	case "$new_inherited_linker_flags " in
+	    *" $arg "*) ;;
+	    * ) new_inherited_linker_flags="$new_inherited_linker_flags $arg" ;;
+	esac
+	continue
+	;;
+
+      -multi_module)
+	single_module="${wl}-multi_module"
+	continue
+	;;
+
+      -no-fast-install)
+	fast_install=no
+	continue
+	;;
+
+      -no-install)
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-darwin* | *-cegcc*)
+	  # The PATH hackery in wrapper scripts is required on Windows
+	  # and Darwin in order for the loader to find any dlls it needs.
+	  func_warning "\`-no-install' is ignored for $host"
+	  func_warning "assuming \`-no-fast-install' instead"
+	  fast_install=no
+	  ;;
+	*) no_install=yes ;;
+	esac
+	continue
+	;;
+
+      -no-undefined)
+	allow_undefined=no
+	continue
+	;;
+
+      -objectlist)
+	prev=objectlist
+	continue
+	;;
+
+      -o) prev=output ;;
+
+      -precious-files-regex)
+	prev=precious_regex
+	continue
+	;;
+
+      -release)
+	prev=release
+	continue
+	;;
+
+      -rpath)
+	prev=rpath
+	continue
+	;;
+
+      -R)
+	prev=xrpath
+	continue
+	;;
+
+      -R*)
+	func_stripname '-R' '' "$arg"
+	dir=$func_stripname_result
+	# We need an absolute path.
+	case $dir in
+	[\\/]* | [A-Za-z]:[\\/]*) ;;
+	*)
+	  func_fatal_error "only absolute run-paths are allowed"
+	  ;;
+	esac
+	case "$xrpath " in
+	*" $dir "*) ;;
+	*) xrpath="$xrpath $dir" ;;
+	esac
+	continue
+	;;
+
+      -shared)
+	# The effects of -shared are defined in a previous loop.
+	continue
+	;;
+
+      -shrext)
+	prev=shrext
+	continue
+	;;
+
+      -static | -static-libtool-libs)
+	# The effects of -static are defined in a previous loop.
+	# We used to do the same as -all-static on platforms that
+	# didn't have a PIC flag, but the assumption that the effects
+	# would be equivalent was wrong.  It would break on at least
+	# Digital Unix and AIX.
+	continue
+	;;
+
+      -thread-safe)
+	thread_safe=yes
+	continue
+	;;
+
+      -version-info)
+	prev=vinfo
+	continue
+	;;
+
+      -version-number)
+	prev=vinfo
+	vinfo_number=yes
+	continue
+	;;
+
+      -weak)
+        prev=weak
+	continue
+	;;
+
+      -Wc,*)
+	func_stripname '-Wc,' '' "$arg"
+	args=$func_stripname_result
+	arg=
+	save_ifs="$IFS"; IFS=','
+	for flag in $args; do
+	  IFS="$save_ifs"
+          func_quote_for_eval "$flag"
+	  arg="$arg $wl$func_quote_for_eval_result"
+	  compiler_flags="$compiler_flags $func_quote_for_eval_result"
+	done
+	IFS="$save_ifs"
+	func_stripname ' ' '' "$arg"
+	arg=$func_stripname_result
+	;;
+
+      -Wl,*)
+	func_stripname '-Wl,' '' "$arg"
+	args=$func_stripname_result
+	arg=
+	save_ifs="$IFS"; IFS=','
+	for flag in $args; do
+	  IFS="$save_ifs"
+          func_quote_for_eval "$flag"
+	  arg="$arg $wl$func_quote_for_eval_result"
+	  compiler_flags="$compiler_flags $wl$func_quote_for_eval_result"
+	  linker_flags="$linker_flags $func_quote_for_eval_result"
+	done
+	IFS="$save_ifs"
+	func_stripname ' ' '' "$arg"
+	arg=$func_stripname_result
+	;;
+
+      -Xcompiler)
+	prev=xcompiler
+	continue
+	;;
+
+      -Xlinker)
+	prev=xlinker
+	continue
+	;;
+
+      -XCClinker)
+	prev=xcclinker
+	continue
+	;;
+
+      # -msg_* for osf cc
+      -msg_*)
+	func_quote_for_eval "$arg"
+	arg="$func_quote_for_eval_result"
+	;;
+
+      # -64, -mips[0-9] enable 64-bit mode on the SGI compiler
+      # -r[0-9][0-9]* specifies the processor on the SGI compiler
+      # -xarch=*, -xtarget=* enable 64-bit mode on the Sun compiler
+      # +DA*, +DD* enable 64-bit mode on the HP compiler
+      # -q* pass through compiler args for the IBM compiler
+      # -m*, -t[45]*, -txscale* pass through architecture-specific
+      # compiler args for GCC
+      # -F/path gives path to uninstalled frameworks, gcc on darwin
+      # -p, -pg, --coverage, -fprofile-* pass through profiling flag for GCC
+      # @file GCC response files
+      -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
+      -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*)
+        func_quote_for_eval "$arg"
+	arg="$func_quote_for_eval_result"
+        func_append compile_command " $arg"
+        func_append finalize_command " $arg"
+        compiler_flags="$compiler_flags $arg"
+        continue
+        ;;
+
+      # Some other compiler flag.
+      -* | +*)
+        func_quote_for_eval "$arg"
+	arg="$func_quote_for_eval_result"
+	;;
+
+      *.$objext)
+	# A standard object.
+	objs="$objs $arg"
+	;;
+
+      *.lo)
+	# A libtool-controlled object.
+
+	# Check to see that this really is a libtool object.
+	if func_lalib_unsafe_p "$arg"; then
+	  pic_object=
+	  non_pic_object=
+
+	  # Read the .lo file
+	  func_source "$arg"
+
+	  if test -z "$pic_object" ||
+	     test -z "$non_pic_object" ||
+	     test "$pic_object" = none &&
+	     test "$non_pic_object" = none; then
+	    func_fatal_error "cannot find name of object for \`$arg'"
+	  fi
+
+	  # Extract subdirectory from the argument.
+	  func_dirname "$arg" "/" ""
+	  xdir="$func_dirname_result"
+
+	  if test "$pic_object" != none; then
+	    # Prepend the subdirectory the object is found in.
+	    pic_object="$xdir$pic_object"
+
+	    if test "$prev" = dlfiles; then
+	      if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then
+		dlfiles="$dlfiles $pic_object"
+		prev=
+		continue
+	      else
+		# If libtool objects are unsupported, then we need to preload.
+		prev=dlprefiles
+	      fi
+	    fi
+
+	    # CHECK ME:  I think I busted this.  -Ossama
+	    if test "$prev" = dlprefiles; then
+	      # Preload the old-style object.
+	      dlprefiles="$dlprefiles $pic_object"
+	      prev=
+	    fi
+
+	    # A PIC object.
+	    func_append libobjs " $pic_object"
+	    arg="$pic_object"
+	  fi
+
+	  # Non-PIC object.
+	  if test "$non_pic_object" != none; then
+	    # Prepend the subdirectory the object is found in.
+	    non_pic_object="$xdir$non_pic_object"
+
+	    # A standard non-PIC object
+	    func_append non_pic_objects " $non_pic_object"
+	    if test -z "$pic_object" || test "$pic_object" = none ; then
+	      arg="$non_pic_object"
+	    fi
+	  else
+	    # If the PIC object exists, use it instead.
+	    # $xdir was prepended to $pic_object above.
+	    non_pic_object="$pic_object"
+	    func_append non_pic_objects " $non_pic_object"
+	  fi
+	else
+	  # Only an error if not doing a dry-run.
+	  if $opt_dry_run; then
+	    # Extract subdirectory from the argument.
+	    func_dirname "$arg" "/" ""
+	    xdir="$func_dirname_result"
+
+	    func_lo2o "$arg"
+	    pic_object=$xdir$objdir/$func_lo2o_result
+	    non_pic_object=$xdir$func_lo2o_result
+	    func_append libobjs " $pic_object"
+	    func_append non_pic_objects " $non_pic_object"
+	  else
+	    func_fatal_error "\`$arg' is not a valid libtool object"
+	  fi
+	fi
+	;;
+
+      *.$libext)
+	# An archive.
+	deplibs="$deplibs $arg"
+	old_deplibs="$old_deplibs $arg"
+	continue
+	;;
+
+      *.la)
+	# A libtool-controlled library.
+
+	if test "$prev" = dlfiles; then
+	  # This library was specified with -dlopen.
+	  dlfiles="$dlfiles $arg"
+	  prev=
+	elif test "$prev" = dlprefiles; then
+	  # The library was specified with -dlpreopen.
+	  dlprefiles="$dlprefiles $arg"
+	  prev=
+	else
+	  deplibs="$deplibs $arg"
+	fi
+	continue
+	;;
+
+      # Some other compiler argument.
+      *)
+	# Unknown arguments in both finalize_command and compile_command need
+	# to be aesthetically quoted because they are evaled later.
+	func_quote_for_eval "$arg"
+	arg="$func_quote_for_eval_result"
+	;;
+      esac # arg
+
+      # Now actually substitute the argument into the commands.
+      if test -n "$arg"; then
+	func_append compile_command " $arg"
+	func_append finalize_command " $arg"
+      fi
+    done # argument parsing loop
+
+    test -n "$prev" && \
+      func_fatal_help "the \`$prevarg' option requires an argument"
+
+    if test "$export_dynamic" = yes && test -n "$export_dynamic_flag_spec"; then
+      eval arg=\"$export_dynamic_flag_spec\"
+      func_append compile_command " $arg"
+      func_append finalize_command " $arg"
+    fi
+
+    oldlibs=
+    # calculate the name of the file, without its directory
+    func_basename "$output"
+    outputname="$func_basename_result"
+    libobjs_save="$libobjs"
+
+    if test -n "$shlibpath_var"; then
+      # get the directories listed in $shlibpath_var
+      eval shlib_search_path=\`\$ECHO \"X\${$shlibpath_var}\" \| \$Xsed -e \'s/:/ /g\'\`
+    else
+      shlib_search_path=
+    fi
+    eval sys_lib_search_path=\"$sys_lib_search_path_spec\"
+    eval sys_lib_dlsearch_path=\"$sys_lib_dlsearch_path_spec\"
+
+    func_dirname "$output" "/" ""
+    output_objdir="$func_dirname_result$objdir"
+    # Create the object directory.
+    func_mkdir_p "$output_objdir"
+
+    # Determine the type of output
+    case $output in
+    "")
+      func_fatal_help "you must specify an output file"
+      ;;
+    *.$libext) linkmode=oldlib ;;
+    *.lo | *.$objext) linkmode=obj ;;
+    *.la) linkmode=lib ;;
+    *) linkmode=prog ;; # Anything else should be a program.
+    esac
+
+    specialdeplibs=
+
+    libs=
+    # Find all interdependent deplibs by searching for libraries
+    # that are linked more than once (e.g. -la -lb -la)
+    for deplib in $deplibs; do
+      if $opt_duplicate_deps ; then
+	case "$libs " in
+	*" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	esac
+      fi
+      libs="$libs $deplib"
+    done
+
+    if test "$linkmode" = lib; then
+      libs="$predeps $libs $compiler_lib_search_path $postdeps"
+
+      # Compute libraries that are listed more than once in $predeps
+      # $postdeps and mark them as special (i.e., whose duplicates are
+      # not to be eliminated).
+      pre_post_deps=
+      if $opt_duplicate_compiler_generated_deps; then
+	for pre_post_dep in $predeps $postdeps; do
+	  case "$pre_post_deps " in
+	  *" $pre_post_dep "*) specialdeplibs="$specialdeplibs $pre_post_deps" ;;
+	  esac
+	  pre_post_deps="$pre_post_deps $pre_post_dep"
+	done
+      fi
+      pre_post_deps=
+    fi
+
+    deplibs=
+    newdependency_libs=
+    newlib_search_path=
+    need_relink=no # whether we're linking any uninstalled libtool libraries
+    notinst_deplibs= # not-installed libtool libraries
+    notinst_path= # paths that contain not-installed libtool libraries
+
+    case $linkmode in
+    lib)
+	passes="conv dlpreopen link"
+	for file in $dlfiles $dlprefiles; do
+	  case $file in
+	  *.la) ;;
+	  *)
+	    func_fatal_help "libraries can \`-dlopen' only libtool libraries: $file"
+	    ;;
+	  esac
+	done
+	;;
+    prog)
+	compile_deplibs=
+	finalize_deplibs=
+	alldeplibs=no
+	newdlfiles=
+	newdlprefiles=
+	passes="conv scan dlopen dlpreopen link"
+	;;
+    *)  passes="conv"
+	;;
+    esac
+
+    for pass in $passes; do
+      # The preopen pass in lib mode reverses $deplibs; put it back here
+      # so that -L comes before libs that need it for instance...
+      if test "$linkmode,$pass" = "lib,link"; then
+	## FIXME: Find the place where the list is rebuilt in the wrong
+	##        order, and fix it there properly
+        tmp_deplibs=
+	for deplib in $deplibs; do
+	  tmp_deplibs="$deplib $tmp_deplibs"
+	done
+	deplibs="$tmp_deplibs"
+      fi
+
+      if test "$linkmode,$pass" = "lib,link" ||
+	 test "$linkmode,$pass" = "prog,scan"; then
+	libs="$deplibs"
+	deplibs=
+      fi
+      if test "$linkmode" = prog; then
+	case $pass in
+	dlopen) libs="$dlfiles" ;;
+	dlpreopen) libs="$dlprefiles" ;;
+	link)
+	  libs="$deplibs %DEPLIBS%"
+	  test "X$link_all_deplibs" != Xno && libs="$libs $dependency_libs"
+	  ;;
+	esac
+      fi
+      if test "$linkmode,$pass" = "lib,dlpreopen"; then
+	# Collect and forward deplibs of preopened libtool libs
+	for lib in $dlprefiles; do
+	  # Ignore non-libtool-libs
+	  dependency_libs=
+	  case $lib in
+	  *.la)	func_source "$lib" ;;
+	  esac
+
+	  # Collect preopened libtool deplibs, except any this library
+	  # has declared as weak libs
+	  for deplib in $dependency_libs; do
+            deplib_base=`$ECHO "X$deplib" | $Xsed -e "$basename"`
+	    case " $weak_libs " in
+	    *" $deplib_base "*) ;;
+	    *) deplibs="$deplibs $deplib" ;;
+	    esac
+	  done
+	done
+	libs="$dlprefiles"
+      fi
+      if test "$pass" = dlopen; then
+	# Collect dlpreopened libraries
+	save_deplibs="$deplibs"
+	deplibs=
+      fi
+
+      for deplib in $libs; do
+	lib=
+	found=no
+	case $deplib in
+	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
+	  if test "$linkmode,$pass" = "prog,link"; then
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    compiler_flags="$compiler_flags $deplib"
+	    if test "$linkmode" = lib ; then
+		case "$new_inherited_linker_flags " in
+		    *" $deplib "*) ;;
+		    * ) new_inherited_linker_flags="$new_inherited_linker_flags $deplib" ;;
+		esac
+	    fi
+	  fi
+	  continue
+	  ;;
+	-l*)
+	  if test "$linkmode" != lib && test "$linkmode" != prog; then
+	    func_warning "\`-l' is ignored for archives/objects"
+	    continue
+	  fi
+	  func_stripname '-l' '' "$deplib"
+	  name=$func_stripname_result
+	  if test "$linkmode" = lib; then
+	    searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path"
+	  else
+	    searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path"
+	  fi
+	  for searchdir in $searchdirs; do
+	    for search_ext in .la $std_shrext .so .a; do
+	      # Search the libtool library
+	      lib="$searchdir/lib${name}${search_ext}"
+	      if test -f "$lib"; then
+		if test "$search_ext" = ".la"; then
+		  found=yes
+		else
+		  found=no
+		fi
+		break 2
+	      fi
+	    done
+	  done
+	  if test "$found" != yes; then
+	    # deplib doesn't seem to be a libtool library
+	    if test "$linkmode,$pass" = "prog,link"; then
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    else
+	      deplibs="$deplib $deplibs"
+	      test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    continue
+	  else # deplib is a libtool library
+	    # If $allow_libtool_libs_with_static_runtimes && $deplib is a stdlib,
+	    # We need to do some special things here, and not later.
+	    if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+	      case " $predeps $postdeps " in
+	      *" $deplib "*)
+		if func_lalib_p "$lib"; then
+		  library_names=
+		  old_library=
+		  func_source "$lib"
+		  for l in $old_library $library_names; do
+		    ll="$l"
+		  done
+		  if test "X$ll" = "X$old_library" ; then # only static version available
+		    found=no
+		    func_dirname "$lib" "" "."
+		    ladir="$func_dirname_result"
+		    lib=$ladir/$old_library
+		    if test "$linkmode,$pass" = "prog,link"; then
+		      compile_deplibs="$deplib $compile_deplibs"
+		      finalize_deplibs="$deplib $finalize_deplibs"
+		    else
+		      deplibs="$deplib $deplibs"
+		      test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs"
+		    fi
+		    continue
+		  fi
+		fi
+		;;
+	      *) ;;
+	      esac
+	    fi
+	  fi
+	  ;; # -l
+	*.ltframework)
+	  if test "$linkmode,$pass" = "prog,link"; then
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    deplibs="$deplib $deplibs"
+	    if test "$linkmode" = lib ; then
+		case "$new_inherited_linker_flags " in
+		    *" $deplib "*) ;;
+		    * ) new_inherited_linker_flags="$new_inherited_linker_flags $deplib" ;;
+		esac
+	    fi
+	  fi
+	  continue
+	  ;;
+	-L*)
+	  case $linkmode in
+	  lib)
+	    deplibs="$deplib $deplibs"
+	    test "$pass" = conv && continue
+	    newdependency_libs="$deplib $newdependency_libs"
+	    func_stripname '-L' '' "$deplib"
+	    newlib_search_path="$newlib_search_path $func_stripname_result"
+	    ;;
+	  prog)
+	    if test "$pass" = conv; then
+	      deplibs="$deplib $deplibs"
+	      continue
+	    fi
+	    if test "$pass" = scan; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    func_stripname '-L' '' "$deplib"
+	    newlib_search_path="$newlib_search_path $func_stripname_result"
+	    ;;
+	  *)
+	    func_warning "\`-L' is ignored for archives/objects"
+	    ;;
+	  esac # linkmode
+	  continue
+	  ;; # -L
+	-R*)
+	  if test "$pass" = link; then
+	    func_stripname '-R' '' "$deplib"
+	    dir=$func_stripname_result
+	    # Make sure the xrpath contains only unique directories.
+	    case "$xrpath " in
+	    *" $dir "*) ;;
+	    *) xrpath="$xrpath $dir" ;;
+	    esac
+	  fi
+	  deplibs="$deplib $deplibs"
+	  continue
+	  ;;
+	*.la) lib="$deplib" ;;
+	*.$libext)
+	  if test "$pass" = conv; then
+	    deplibs="$deplib $deplibs"
+	    continue
+	  fi
+	  case $linkmode in
+	  lib)
+	    # Linking convenience modules into shared libraries is allowed,
+	    # but linking other static libraries is non-portable.
+	    case " $dlpreconveniencelibs " in
+	    *" $deplib "*) ;;
+	    *)
+	      valid_a_lib=no
+	      case $deplibs_check_method in
+		match_pattern*)
+		  set dummy $deplibs_check_method; shift
+		  match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+		  if eval "\$ECHO \"X$deplib\"" 2>/dev/null | $Xsed -e 10q \
+		    | $EGREP "$match_pattern_regex" > /dev/null; then
+		    valid_a_lib=yes
+		  fi
+		;;
+		pass_all)
+		  valid_a_lib=yes
+		;;
+	      esac
+	      if test "$valid_a_lib" != yes; then
+		$ECHO
+		$ECHO "*** Warning: Trying to link with static lib archive $deplib."
+		$ECHO "*** I have the capability to make that library automatically link in when"
+		$ECHO "*** you link to this library.  But I can only do this if you have a"
+		$ECHO "*** shared version of the library, which you do not appear to have"
+		$ECHO "*** because the file extensions .$libext of this argument makes me believe"
+		$ECHO "*** that it is just a static archive that I should not use here."
+	      else
+		$ECHO
+		$ECHO "*** Warning: Linking the shared library $output against the"
+		$ECHO "*** static library $deplib is not portable!"
+		deplibs="$deplib $deplibs"
+	      fi
+	      ;;
+	    esac
+	    continue
+	    ;;
+	  prog)
+	    if test "$pass" != link; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    fi
+	    continue
+	    ;;
+	  esac # linkmode
+	  ;; # *.$libext
+	*.lo | *.$objext)
+	  if test "$pass" = conv; then
+	    deplibs="$deplib $deplibs"
+	  elif test "$linkmode" = prog; then
+	    if test "$pass" = dlpreopen || test "$dlopen_support" != yes || test "$build_libtool_libs" = no; then
+	      # If there is no dlopen support or we're linking statically,
+	      # we need to preload.
+	      newdlprefiles="$newdlprefiles $deplib"
+	      compile_deplibs="$deplib $compile_deplibs"
+	      finalize_deplibs="$deplib $finalize_deplibs"
+	    else
+	      newdlfiles="$newdlfiles $deplib"
+	    fi
+	  fi
+	  continue
+	  ;;
+	%DEPLIBS%)
+	  alldeplibs=yes
+	  continue
+	  ;;
+	esac # case $deplib
+
+	if test "$found" = yes || test -f "$lib"; then :
+	else
+	  func_fatal_error "cannot find the library \`$lib' or unhandled argument \`$deplib'"
+	fi
+
+	# Check to see that this really is a libtool archive.
+	func_lalib_unsafe_p "$lib" \
+	  || func_fatal_error "\`$lib' is not a valid libtool archive"
+
+	func_dirname "$lib" "" "."
+	ladir="$func_dirname_result"
+
+	dlname=
+	dlopen=
+	dlpreopen=
+	libdir=
+	library_names=
+	old_library=
+	inherited_linker_flags=
+	# If the library was installed with an old release of libtool,
+	# it will not redefine variables installed, or shouldnotlink
+	installed=yes
+	shouldnotlink=no
+	avoidtemprpath=
+
+
+	# Read the .la file
+	func_source "$lib"
+
+	# Convert "-framework foo" to "foo.ltframework"
+	if test -n "$inherited_linker_flags"; then
+	  tmp_inherited_linker_flags=`$ECHO "X$inherited_linker_flags" | $Xsed -e 's/-framework \([^ $]*\)/\1.ltframework/g'`
+	  for tmp_inherited_linker_flag in $tmp_inherited_linker_flags; do
+	    case " $new_inherited_linker_flags " in
+	      *" $tmp_inherited_linker_flag "*) ;;
+	      *) new_inherited_linker_flags="$new_inherited_linker_flags $tmp_inherited_linker_flag";;
+	    esac
+	  done
+	fi
+	dependency_libs=`$ECHO "X $dependency_libs" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	if test "$linkmode,$pass" = "lib,link" ||
+	   test "$linkmode,$pass" = "prog,scan" ||
+	   { test "$linkmode" != prog && test "$linkmode" != lib; }; then
+	  test -n "$dlopen" && dlfiles="$dlfiles $dlopen"
+	  test -n "$dlpreopen" && dlprefiles="$dlprefiles $dlpreopen"
+	fi
+
+	if test "$pass" = conv; then
+	  # Only check for convenience libraries
+	  deplibs="$lib $deplibs"
+	  if test -z "$libdir"; then
+	    if test -z "$old_library"; then
+	      func_fatal_error "cannot find name of link library for \`$lib'"
+	    fi
+	    # It is a libtool convenience library, so add in its objects.
+	    convenience="$convenience $ladir/$objdir/$old_library"
+	    old_convenience="$old_convenience $ladir/$objdir/$old_library"
+	    tmp_libs=
+	    for deplib in $dependency_libs; do
+	      deplibs="$deplib $deplibs"
+	      if $opt_duplicate_deps ; then
+		case "$tmp_libs " in
+		*" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+		esac
+	      fi
+	      tmp_libs="$tmp_libs $deplib"
+	    done
+	  elif test "$linkmode" != prog && test "$linkmode" != lib; then
+	    func_fatal_error "\`$lib' is not a convenience library"
+	  fi
+	  continue
+	fi # $pass = conv
+
+
+	# Get the name of the library we link against.
+	linklib=
+	for l in $old_library $library_names; do
+	  linklib="$l"
+	done
+	if test -z "$linklib"; then
+	  func_fatal_error "cannot find name of link library for \`$lib'"
+	fi
+
+	# This library was specified with -dlopen.
+	if test "$pass" = dlopen; then
+	  if test -z "$libdir"; then
+	    func_fatal_error "cannot -dlopen a convenience library: \`$lib'"
+	  fi
+	  if test -z "$dlname" ||
+	     test "$dlopen_support" != yes ||
+	     test "$build_libtool_libs" = no; then
+	    # If there is no dlname, no dlopen support or we're linking
+	    # statically, we need to preload.  We also need to preload any
+	    # dependent libraries so libltdl's deplib preloader doesn't
+	    # bomb out in the load deplibs phase.
+	    dlprefiles="$dlprefiles $lib $dependency_libs"
+	  else
+	    newdlfiles="$newdlfiles $lib"
+	  fi
+	  continue
+	fi # $pass = dlopen
+
+	# We need an absolute path.
+	case $ladir in
+	[\\/]* | [A-Za-z]:[\\/]*) abs_ladir="$ladir" ;;
+	*)
+	  abs_ladir=`cd "$ladir" && pwd`
+	  if test -z "$abs_ladir"; then
+	    func_warning "cannot determine absolute directory name of \`$ladir'"
+	    func_warning "passing it literally to the linker, although it might fail"
+	    abs_ladir="$ladir"
+	  fi
+	  ;;
+	esac
+	func_basename "$lib"
+	laname="$func_basename_result"
+
+	# Find the relevant object directory and library name.
+	if test "X$installed" = Xyes; then
+	  if test ! -f "$libdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+	    func_warning "library \`$lib' was moved."
+	    dir="$ladir"
+	    absdir="$abs_ladir"
+	    libdir="$abs_ladir"
+	  else
+	    dir="$libdir"
+	    absdir="$libdir"
+	  fi
+	  test "X$hardcode_automatic" = Xyes && avoidtemprpath=yes
+	else
+	  if test ! -f "$ladir/$objdir/$linklib" && test -f "$abs_ladir/$linklib"; then
+	    dir="$ladir"
+	    absdir="$abs_ladir"
+	    # Remove this search path later
+	    notinst_path="$notinst_path $abs_ladir"
+	  else
+	    dir="$ladir/$objdir"
+	    absdir="$abs_ladir/$objdir"
+	    # Remove this search path later
+	    notinst_path="$notinst_path $abs_ladir"
+	  fi
+	fi # $installed = yes
+	func_stripname 'lib' '.la' "$laname"
+	name=$func_stripname_result
+
+	# This library was specified with -dlpreopen.
+	if test "$pass" = dlpreopen; then
+	  if test -z "$libdir" && test "$linkmode" = prog; then
+	    func_fatal_error "only libraries may -dlpreopen a convenience library: \`$lib'"
+	  fi
+	  # Prefer using a static library (so that no silly _DYNAMIC symbols
+	  # are required to link).
+	  if test -n "$old_library"; then
+	    newdlprefiles="$newdlprefiles $dir/$old_library"
+	    # Keep a list of preopened convenience libraries to check
+	    # that they are being used correctly in the link pass.
+	    test -z "$libdir" && \
+		dlpreconveniencelibs="$dlpreconveniencelibs $dir/$old_library"
+	  # Otherwise, use the dlname, so that lt_dlopen finds it.
+	  elif test -n "$dlname"; then
+	    newdlprefiles="$newdlprefiles $dir/$dlname"
+	  else
+	    newdlprefiles="$newdlprefiles $dir/$linklib"
+	  fi
+	fi # $pass = dlpreopen
+
+	if test -z "$libdir"; then
+	  # Link the convenience library
+	  if test "$linkmode" = lib; then
+	    deplibs="$dir/$old_library $deplibs"
+	  elif test "$linkmode,$pass" = "prog,link"; then
+	    compile_deplibs="$dir/$old_library $compile_deplibs"
+	    finalize_deplibs="$dir/$old_library $finalize_deplibs"
+	  else
+	    deplibs="$lib $deplibs" # used for prog,scan pass
+	  fi
+	  continue
+	fi
+
+
+	if test "$linkmode" = prog && test "$pass" != link; then
+	  newlib_search_path="$newlib_search_path $ladir"
+	  deplibs="$lib $deplibs"
+
+	  linkalldeplibs=no
+	  if test "$link_all_deplibs" != no || test -z "$library_names" ||
+	     test "$build_libtool_libs" = no; then
+	    linkalldeplibs=yes
+	  fi
+
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    case $deplib in
+	    -L*) func_stripname '-L' '' "$deplib"
+	         newlib_search_path="$newlib_search_path $func_stripname_result"
+		 ;;
+	    esac
+	    # Need to link against all dependency_libs?
+	    if test "$linkalldeplibs" = yes; then
+	      deplibs="$deplib $deplibs"
+	    else
+	      # Need to hardcode shared library paths
+	      # or/and link against static libraries
+	      newdependency_libs="$deplib $newdependency_libs"
+	    fi
+	    if $opt_duplicate_deps ; then
+	      case "$tmp_libs " in
+	      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	      esac
+	    fi
+	    tmp_libs="$tmp_libs $deplib"
+	  done # for deplib
+	  continue
+	fi # $linkmode = prog...
+
+	if test "$linkmode,$pass" = "prog,link"; then
+	  if test -n "$library_names" &&
+	     { { test "$prefer_static_libs" = no ||
+	         test "$prefer_static_libs,$installed" = "built,yes"; } ||
+	       test -z "$old_library"; }; then
+	    # We need to hardcode the library path
+	    if test -n "$shlibpath_var" && test -z "$avoidtemprpath" ; then
+	      # Make sure the rpath contains only unique directories.
+	      case "$temp_rpath:" in
+	      *"$absdir:"*) ;;
+	      *) temp_rpath="$temp_rpath$absdir:" ;;
+	      esac
+	    fi
+
+	    # Hardcode the library path.
+	    # Skip directories that are in the system default run-time
+	    # search path.
+	    case " $sys_lib_dlsearch_path " in
+	    *" $absdir "*) ;;
+	    *)
+	      case "$compile_rpath " in
+	      *" $absdir "*) ;;
+	      *) compile_rpath="$compile_rpath $absdir"
+	      esac
+	      ;;
+	    esac
+	    case " $sys_lib_dlsearch_path " in
+	    *" $libdir "*) ;;
+	    *)
+	      case "$finalize_rpath " in
+	      *" $libdir "*) ;;
+	      *) finalize_rpath="$finalize_rpath $libdir"
+	      esac
+	      ;;
+	    esac
+	  fi # $linkmode,$pass = prog,link...
+
+	  if test "$alldeplibs" = yes &&
+	     { test "$deplibs_check_method" = pass_all ||
+	       { test "$build_libtool_libs" = yes &&
+		 test -n "$library_names"; }; }; then
+	    # We only need to search for static libraries
+	    continue
+	  fi
+	fi
+
+	link_static=no # Whether the deplib will be linked statically
+	use_static_libs=$prefer_static_libs
+	if test "$use_static_libs" = built && test "$installed" = yes; then
+	  use_static_libs=no
+	fi
+	if test -n "$library_names" &&
+	   { test "$use_static_libs" = no || test -z "$old_library"; }; then
+	  case $host in
+	  *cygwin* | *mingw* | *cegcc*)
+	      # No point in relinking DLLs because paths are not encoded
+	      notinst_deplibs="$notinst_deplibs $lib"
+	      need_relink=no
+	    ;;
+	  *)
+	    if test "$installed" = no; then
+	      notinst_deplibs="$notinst_deplibs $lib"
+	      need_relink=yes
+	    fi
+	    ;;
+	  esac
+	  # This is a shared library
+
+	  # Warn about portability, can't link against -module's on some
+	  # systems (darwin).  Don't bleat about dlopened modules though!
+	  dlopenmodule=""
+	  for dlpremoduletest in $dlprefiles; do
+	    if test "X$dlpremoduletest" = "X$lib"; then
+	      dlopenmodule="$dlpremoduletest"
+	      break
+	    fi
+	  done
+	  if test -z "$dlopenmodule" && test "$shouldnotlink" = yes && test "$pass" = link; then
+	    $ECHO
+	    if test "$linkmode" = prog; then
+	      $ECHO "*** Warning: Linking the executable $output against the loadable module"
+	    else
+	      $ECHO "*** Warning: Linking the shared library $output against the loadable module"
+	    fi
+	    $ECHO "*** $linklib is not portable!"
+	  fi
+	  if test "$linkmode" = lib &&
+	     test "$hardcode_into_libs" = yes; then
+	    # Hardcode the library path.
+	    # Skip directories that are in the system default run-time
+	    # search path.
+	    case " $sys_lib_dlsearch_path " in
+	    *" $absdir "*) ;;
+	    *)
+	      case "$compile_rpath " in
+	      *" $absdir "*) ;;
+	      *) compile_rpath="$compile_rpath $absdir"
+	      esac
+	      ;;
+	    esac
+	    case " $sys_lib_dlsearch_path " in
+	    *" $libdir "*) ;;
+	    *)
+	      case "$finalize_rpath " in
+	      *" $libdir "*) ;;
+	      *) finalize_rpath="$finalize_rpath $libdir"
+	      esac
+	      ;;
+	    esac
+	  fi
+
+	  if test -n "$old_archive_from_expsyms_cmds"; then
+	    # figure out the soname
+	    set dummy $library_names
+	    shift
+	    realname="$1"
+	    shift
+	    libname=`eval "\\$ECHO \"$libname_spec\""`
+	    # use dlname if we got it. it's perfectly good, no?
+	    if test -n "$dlname"; then
+	      soname="$dlname"
+	    elif test -n "$soname_spec"; then
+	      # bleh windows
+	      case $host in
+	      *cygwin* | mingw* | *cegcc*)
+	        func_arith $current - $age
+		major=$func_arith_result
+		versuffix="-$major"
+		;;
+	      esac
+	      eval soname=\"$soname_spec\"
+	    else
+	      soname="$realname"
+	    fi
+
+	    # Make a new name for the extract_expsyms_cmds to use
+	    soroot="$soname"
+	    func_basename "$soroot"
+	    soname="$func_basename_result"
+	    func_stripname 'lib' '.dll' "$soname"
+	    newlib=libimp-$func_stripname_result.a
+
+	    # If the library has no export list, then create one now
+	    if test -f "$output_objdir/$soname-def"; then :
+	    else
+	      func_verbose "extracting exported symbol list from \`$soname'"
+	      func_execute_cmds "$extract_expsyms_cmds" 'exit $?'
+	    fi
+
+	    # Create $newlib
+	    if test -f "$output_objdir/$newlib"; then :; else
+	      func_verbose "generating import library for \`$soname'"
+	      func_execute_cmds "$old_archive_from_expsyms_cmds" 'exit $?'
+	    fi
+	    # make sure the library variables are pointing to the new library
+	    dir=$output_objdir
+	    linklib=$newlib
+	  fi # test -n "$old_archive_from_expsyms_cmds"
+
+	  if test "$linkmode" = prog || test "$mode" != relink; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    lib_linked=yes
+	    case $hardcode_action in
+	    immediate | unsupported)
+	      if test "$hardcode_direct" = no; then
+		add="$dir/$linklib"
+		case $host in
+		  *-*-sco3.2v5.0.[024]*) add_dir="-L$dir" ;;
+		  *-*-sysv4*uw2*) add_dir="-L$dir" ;;
+		  *-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \
+		    *-*-unixware7*) add_dir="-L$dir" ;;
+		  *-*-darwin* )
+		    # if the lib is a (non-dlopened) module then we can not
+		    # link against it, someone is ignoring the earlier warnings
+		    if /usr/bin/file -L $add 2> /dev/null |
+			 $GREP ": [^:]* bundle" >/dev/null ; then
+		      if test "X$dlopenmodule" != "X$lib"; then
+			$ECHO "*** Warning: lib $linklib is a module, not a shared library"
+			if test -z "$old_library" ; then
+			  $ECHO
+			  $ECHO "*** And there doesn't seem to be a static archive available"
+			  $ECHO "*** The link will probably fail, sorry"
+			else
+			  add="$dir/$old_library"
+			fi
+		      elif test -n "$old_library"; then
+			add="$dir/$old_library"
+		      fi
+		    fi
+		esac
+	      elif test "$hardcode_minus_L" = no; then
+		case $host in
+		*-*-sunos*) add_shlibpath="$dir" ;;
+		esac
+		add_dir="-L$dir"
+		add="-l$name"
+	      elif test "$hardcode_shlibpath_var" = no; then
+		add_shlibpath="$dir"
+		add="-l$name"
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    relink)
+	      if test "$hardcode_direct" = yes &&
+	         test "$hardcode_direct_absolute" = no; then
+		add="$dir/$linklib"
+	      elif test "$hardcode_minus_L" = yes; then
+		add_dir="-L$dir"
+		# Try looking first in the location we're being installed to.
+		if test -n "$inst_prefix_dir"; then
+		  case $libdir in
+		    [\\/]*)
+		      add_dir="$add_dir -L$inst_prefix_dir$libdir"
+		      ;;
+		  esac
+		fi
+		add="-l$name"
+	      elif test "$hardcode_shlibpath_var" = yes; then
+		add_shlibpath="$dir"
+		add="-l$name"
+	      else
+		lib_linked=no
+	      fi
+	      ;;
+	    *) lib_linked=no ;;
+	    esac
+
+	    if test "$lib_linked" != yes; then
+	      func_fatal_configuration "unsupported hardcode properties"
+	    fi
+
+	    if test -n "$add_shlibpath"; then
+	      case :$compile_shlibpath: in
+	      *":$add_shlibpath:"*) ;;
+	      *) compile_shlibpath="$compile_shlibpath$add_shlibpath:" ;;
+	      esac
+	    fi
+	    if test "$linkmode" = prog; then
+	      test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs"
+	      test -n "$add" && compile_deplibs="$add $compile_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	      if test "$hardcode_direct" != yes &&
+		 test "$hardcode_minus_L" != yes &&
+		 test "$hardcode_shlibpath_var" = yes; then
+		case :$finalize_shlibpath: in
+		*":$libdir:"*) ;;
+		*) finalize_shlibpath="$finalize_shlibpath$libdir:" ;;
+		esac
+	      fi
+	    fi
+	  fi
+
+	  if test "$linkmode" = prog || test "$mode" = relink; then
+	    add_shlibpath=
+	    add_dir=
+	    add=
+	    # Finalize command for both is simple: just hardcode it.
+	    if test "$hardcode_direct" = yes &&
+	       test "$hardcode_direct_absolute" = no; then
+	      add="$libdir/$linklib"
+	    elif test "$hardcode_minus_L" = yes; then
+	      add_dir="-L$libdir"
+	      add="-l$name"
+	    elif test "$hardcode_shlibpath_var" = yes; then
+	      case :$finalize_shlibpath: in
+	      *":$libdir:"*) ;;
+	      *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;;
+	      esac
+	      add="-l$name"
+	    elif test "$hardcode_automatic" = yes; then
+	      if test -n "$inst_prefix_dir" &&
+		 test -f "$inst_prefix_dir$libdir/$linklib" ; then
+		add="$inst_prefix_dir$libdir/$linklib"
+	      else
+		add="$libdir/$linklib"
+	      fi
+	    else
+	      # We cannot seem to hardcode it, guess we'll fake it.
+	      add_dir="-L$libdir"
+	      # Try looking first in the location we're being installed to.
+	      if test -n "$inst_prefix_dir"; then
+		case $libdir in
+		  [\\/]*)
+		    add_dir="$add_dir -L$inst_prefix_dir$libdir"
+		    ;;
+		esac
+	      fi
+	      add="-l$name"
+	    fi
+
+	    if test "$linkmode" = prog; then
+	      test -n "$add_dir" && finalize_deplibs="$add_dir $finalize_deplibs"
+	      test -n "$add" && finalize_deplibs="$add $finalize_deplibs"
+	    else
+	      test -n "$add_dir" && deplibs="$add_dir $deplibs"
+	      test -n "$add" && deplibs="$add $deplibs"
+	    fi
+	  fi
+	elif test "$linkmode" = prog; then
+	  # Here we assume that one of hardcode_direct or hardcode_minus_L
+	  # is not unsupported.  This is valid on all known static and
+	  # shared platforms.
+	  if test "$hardcode_direct" != unsupported; then
+	    test -n "$old_library" && linklib="$old_library"
+	    compile_deplibs="$dir/$linklib $compile_deplibs"
+	    finalize_deplibs="$dir/$linklib $finalize_deplibs"
+	  else
+	    compile_deplibs="-l$name -L$dir $compile_deplibs"
+	    finalize_deplibs="-l$name -L$dir $finalize_deplibs"
+	  fi
+	elif test "$build_libtool_libs" = yes; then
+	  # Not a shared library
+	  if test "$deplibs_check_method" != pass_all; then
+	    # We're trying link a shared library against a static one
+	    # but the system doesn't support it.
+
+	    # Just print a warning and add the library to dependency_libs so
+	    # that the program can be linked against the static library.
+	    $ECHO
+	    $ECHO "*** Warning: This system can not link to static lib archive $lib."
+	    $ECHO "*** I have the capability to make that library automatically link in when"
+	    $ECHO "*** you link to this library.  But I can only do this if you have a"
+	    $ECHO "*** shared version of the library, which you do not appear to have."
+	    if test "$module" = yes; then
+	      $ECHO "*** But as you try to build a module library, libtool will still create "
+	      $ECHO "*** a static module, that should work as long as the dlopening application"
+	      $ECHO "*** is linked with the -dlopen flag to resolve symbols at runtime."
+	      if test -z "$global_symbol_pipe"; then
+		$ECHO
+		$ECHO "*** However, this would only work if libtool was able to extract symbol"
+		$ECHO "*** lists from a program, using \`nm' or equivalent, but libtool could"
+		$ECHO "*** not find such a program.  So, this module is probably useless."
+		$ECHO "*** \`nm' from GNU binutils and a full rebuild may help."
+	      fi
+	      if test "$build_old_libs" = no; then
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  else
+	    deplibs="$dir/$old_library $deplibs"
+	    link_static=yes
+	  fi
+	fi # link shared/static library?
+
+	if test "$linkmode" = lib; then
+	  if test -n "$dependency_libs" &&
+	     { test "$hardcode_into_libs" != yes ||
+	       test "$build_old_libs" = yes ||
+	       test "$link_static" = yes; }; then
+	    # Extract -R from dependency_libs
+	    temp_deplibs=
+	    for libdir in $dependency_libs; do
+	      case $libdir in
+	      -R*) func_stripname '-R' '' "$libdir"
+	           temp_xrpath=$func_stripname_result
+		   case " $xrpath " in
+		   *" $temp_xrpath "*) ;;
+		   *) xrpath="$xrpath $temp_xrpath";;
+		   esac;;
+	      *) temp_deplibs="$temp_deplibs $libdir";;
+	      esac
+	    done
+	    dependency_libs="$temp_deplibs"
+	  fi
+
+	  newlib_search_path="$newlib_search_path $absdir"
+	  # Link against this library
+	  test "$link_static" = no && newdependency_libs="$abs_ladir/$laname $newdependency_libs"
+	  # ... and its dependency_libs
+	  tmp_libs=
+	  for deplib in $dependency_libs; do
+	    newdependency_libs="$deplib $newdependency_libs"
+	    if $opt_duplicate_deps ; then
+	      case "$tmp_libs " in
+	      *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;;
+	      esac
+	    fi
+	    tmp_libs="$tmp_libs $deplib"
+	  done
+
+	  if test "$link_all_deplibs" != no; then
+	    # Add the search paths of all dependency libraries
+	    for deplib in $dependency_libs; do
+	      path=
+	      case $deplib in
+	      -L*) path="$deplib" ;;
+	      *.la)
+	        func_dirname "$deplib" "" "."
+		dir="$func_dirname_result"
+		# We need an absolute path.
+		case $dir in
+		[\\/]* | [A-Za-z]:[\\/]*) absdir="$dir" ;;
+		*)
+		  absdir=`cd "$dir" && pwd`
+		  if test -z "$absdir"; then
+		    func_warning "cannot determine absolute directory name of \`$dir'"
+		    absdir="$dir"
+		  fi
+		  ;;
+		esac
+		if $GREP "^installed=no" $deplib > /dev/null; then
+		case $host in
+		*-*-darwin*)
+		  depdepl=
+		  eval deplibrary_names=`${SED} -n -e 's/^library_names=\(.*\)$/\1/p' $deplib`
+		  if test -n "$deplibrary_names" ; then
+		    for tmp in $deplibrary_names ; do
+		      depdepl=$tmp
+		    done
+		    if test -f "$absdir/$objdir/$depdepl" ; then
+		      depdepl="$absdir/$objdir/$depdepl"
+		      darwin_install_name=`${OTOOL} -L $depdepl | awk '{if (NR == 2) {print $1;exit}}'`
+                      if test -z "$darwin_install_name"; then
+                          darwin_install_name=`${OTOOL64} -L $depdepl  | awk '{if (NR == 2) {print $1;exit}}'`
+                      fi
+		      compiler_flags="$compiler_flags ${wl}-dylib_file ${wl}${darwin_install_name}:${depdepl}"
+		      linker_flags="$linker_flags -dylib_file ${darwin_install_name}:${depdepl}"
+		      path=
+		    fi
+		  fi
+		  ;;
+		*)
+		  path="-L$absdir/$objdir"
+		  ;;
+		esac
+		else
+		  eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib`
+		  test -z "$libdir" && \
+		    func_fatal_error "\`$deplib' is not a valid libtool archive"
+		  test "$absdir" != "$libdir" && \
+		    func_warning "\`$deplib' seems to be moved"
+
+		  path="-L$absdir"
+		fi
+		;;
+	      esac
+	      case " $deplibs " in
+	      *" $path "*) ;;
+	      *) deplibs="$path $deplibs" ;;
+	      esac
+	    done
+	  fi # link_all_deplibs != no
+	fi # linkmode = lib
+      done # for deplib in $libs
+      if test "$pass" = link; then
+	if test "$linkmode" = "prog"; then
+	  compile_deplibs="$new_inherited_linker_flags $compile_deplibs"
+	  finalize_deplibs="$new_inherited_linker_flags $finalize_deplibs"
+	else
+	  compiler_flags="$compiler_flags "`$ECHO "X $new_inherited_linker_flags" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	fi
+      fi
+      dependency_libs="$newdependency_libs"
+      if test "$pass" = dlpreopen; then
+	# Link the dlpreopened libraries before other libraries
+	for deplib in $save_deplibs; do
+	  deplibs="$deplib $deplibs"
+	done
+      fi
+      if test "$pass" != dlopen; then
+	if test "$pass" != conv; then
+	  # Make sure lib_search_path contains only unique directories.
+	  lib_search_path=
+	  for dir in $newlib_search_path; do
+	    case "$lib_search_path " in
+	    *" $dir "*) ;;
+	    *) lib_search_path="$lib_search_path $dir" ;;
+	    esac
+	  done
+	  newlib_search_path=
+	fi
+
+	if test "$linkmode,$pass" != "prog,link"; then
+	  vars="deplibs"
+	else
+	  vars="compile_deplibs finalize_deplibs"
+	fi
+	for var in $vars dependency_libs; do
+	  # Add libraries to $var in reverse order
+	  eval tmp_libs=\"\$$var\"
+	  new_libs=
+	  for deplib in $tmp_libs; do
+	    # FIXME: Pedantically, this is the right thing to do, so
+	    #        that some nasty dependency loop isn't accidentally
+	    #        broken:
+	    #new_libs="$deplib $new_libs"
+	    # Pragmatically, this seems to cause very few problems in
+	    # practice:
+	    case $deplib in
+	    -L*) new_libs="$deplib $new_libs" ;;
+	    -R*) ;;
+	    *)
+	      # And here is the reason: when a library appears more
+	      # than once as an explicit dependence of a library, or
+	      # is implicitly linked in more than once by the
+	      # compiler, it is considered special, and multiple
+	      # occurrences thereof are not removed.  Compare this
+	      # with having the same library being listed as a
+	      # dependency of multiple other libraries: in this case,
+	      # we know (pedantically, we assume) the library does not
+	      # need to be listed more than once, so we keep only the
+	      # last copy.  This is not always right, but it is rare
+	      # enough that we require users that really mean to play
+	      # such unportable linking tricks to link the library
+	      # using -Wl,-lname, so that libtool does not consider it
+	      # for duplicate removal.
+	      case " $specialdeplibs " in
+	      *" $deplib "*) new_libs="$deplib $new_libs" ;;
+	      *)
+		case " $new_libs " in
+		*" $deplib "*) ;;
+		*) new_libs="$deplib $new_libs" ;;
+		esac
+		;;
+	      esac
+	      ;;
+	    esac
+	  done
+	  tmp_libs=
+	  for deplib in $new_libs; do
+	    case $deplib in
+	    -L*)
+	      case " $tmp_libs " in
+	      *" $deplib "*) ;;
+	      *) tmp_libs="$tmp_libs $deplib" ;;
+	      esac
+	      ;;
+	    *) tmp_libs="$tmp_libs $deplib" ;;
+	    esac
+	  done
+	  eval $var=\"$tmp_libs\"
+	done # for var
+      fi
+      # Last step: remove runtime libs from dependency_libs
+      # (they stay in deplibs)
+      tmp_libs=
+      for i in $dependency_libs ; do
+	case " $predeps $postdeps $compiler_lib_search_path " in
+	*" $i "*)
+	  i=""
+	  ;;
+	esac
+	if test -n "$i" ; then
+	  tmp_libs="$tmp_libs $i"
+	fi
+      done
+      dependency_libs=$tmp_libs
+    done # for pass
+    if test "$linkmode" = prog; then
+      dlfiles="$newdlfiles"
+    fi
+    if test "$linkmode" = prog || test "$linkmode" = lib; then
+      dlprefiles="$newdlprefiles"
+    fi
+
+    case $linkmode in
+    oldlib)
+      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+	func_warning "\`-dlopen' is ignored for archives"
+      fi
+
+      case " $deplibs" in
+      *\ -l* | *\ -L*)
+	func_warning "\`-l' and \`-L' are ignored for archives" ;;
+      esac
+
+      test -n "$rpath" && \
+	func_warning "\`-rpath' is ignored for archives"
+
+      test -n "$xrpath" && \
+	func_warning "\`-R' is ignored for archives"
+
+      test -n "$vinfo" && \
+	func_warning "\`-version-info/-version-number' is ignored for archives"
+
+      test -n "$release" && \
+	func_warning "\`-release' is ignored for archives"
+
+      test -n "$export_symbols$export_symbols_regex" && \
+	func_warning "\`-export-symbols' is ignored for archives"
+
+      # Now set the variables for building old libraries.
+      build_libtool_libs=no
+      oldlibs="$output"
+      objs="$objs$old_deplibs"
+      ;;
+
+    lib)
+      # Make sure we only generate libraries of the form `libNAME.la'.
+      case $outputname in
+      lib*)
+	func_stripname 'lib' '.la' "$outputname"
+	name=$func_stripname_result
+	eval shared_ext=\"$shrext_cmds\"
+	eval libname=\"$libname_spec\"
+	;;
+      *)
+	test "$module" = no && \
+	  func_fatal_help "libtool library \`$output' must begin with \`lib'"
+
+	if test "$need_lib_prefix" != no; then
+	  # Add the "lib" prefix for modules if required
+	  func_stripname '' '.la' "$outputname"
+	  name=$func_stripname_result
+	  eval shared_ext=\"$shrext_cmds\"
+	  eval libname=\"$libname_spec\"
+	else
+	  func_stripname '' '.la' "$outputname"
+	  libname=$func_stripname_result
+	fi
+	;;
+      esac
+
+      if test -n "$objs"; then
+	if test "$deplibs_check_method" != pass_all; then
+	  func_fatal_error "cannot build libtool library \`$output' from non-libtool objects on this host:$objs"
+	else
+	  $ECHO
+	  $ECHO "*** Warning: Linking the shared library $output against the non-libtool"
+	  $ECHO "*** objects $objs is not portable!"
+	  libobjs="$libobjs $objs"
+	fi
+      fi
+
+      test "$dlself" != no && \
+	func_warning "\`-dlopen self' is ignored for libtool libraries"
+
+      set dummy $rpath
+      shift
+      test "$#" -gt 1 && \
+	func_warning "ignoring multiple \`-rpath's for a libtool library"
+
+      install_libdir="$1"
+
+      oldlibs=
+      if test -z "$rpath"; then
+	if test "$build_libtool_libs" = yes; then
+	  # Building a libtool convenience library.
+	  # Some compilers have problems with a `.al' extension so
+	  # convenience libraries should have the same extension an
+	  # archive normally would.
+	  oldlibs="$output_objdir/$libname.$libext $oldlibs"
+	  build_libtool_libs=convenience
+	  build_old_libs=yes
+	fi
+
+	test -n "$vinfo" && \
+	  func_warning "\`-version-info/-version-number' is ignored for convenience libraries"
+
+	test -n "$release" && \
+	  func_warning "\`-release' is ignored for convenience libraries"
+      else
+
+	# Parse the version information argument.
+	save_ifs="$IFS"; IFS=':'
+	set dummy $vinfo 0 0 0
+	shift
+	IFS="$save_ifs"
+
+	test -n "$7" && \
+	  func_fatal_help "too many parameters to \`-version-info'"
+
+	# convert absolute version numbers to libtool ages
+	# this retains compatibility with .la files and attempts
+	# to make the code below a bit more comprehensible
+
+	case $vinfo_number in
+	yes)
+	  number_major="$1"
+	  number_minor="$2"
+	  number_revision="$3"
+	  #
+	  # There are really only two kinds -- those that
+	  # use the current revision as the major version
+	  # and those that subtract age and use age as
+	  # a minor version.  But, then there is irix
+	  # which has an extra 1 added just for fun
+	  #
+	  case $version_type in
+	  darwin|linux|osf|windows|none)
+	    func_arith $number_major + $number_minor
+	    current=$func_arith_result
+	    age="$number_minor"
+	    revision="$number_revision"
+	    ;;
+	  freebsd-aout|freebsd-elf|sunos)
+	    current="$number_major"
+	    revision="$number_minor"
+	    age="0"
+	    ;;
+	  irix|nonstopux)
+	    func_arith $number_major + $number_minor
+	    current=$func_arith_result
+	    age="$number_minor"
+	    revision="$number_minor"
+	    lt_irix_increment=no
+	    ;;
+	  *)
+	    func_fatal_configuration "$modename: unknown library version type \`$version_type'"
+	    ;;
+	  esac
+	  ;;
+	no)
+	  current="$1"
+	  revision="$2"
+	  age="$3"
+	  ;;
+	esac
+
+	# Check that each of the things are valid numbers.
+	case $current in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "CURRENT \`$current' must be a nonnegative integer"
+	  func_fatal_error "\`$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	case $revision in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "REVISION \`$revision' must be a nonnegative integer"
+	  func_fatal_error "\`$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	case $age in
+	0|[1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9]|[1-9][0-9][0-9][0-9][0-9]) ;;
+	*)
+	  func_error "AGE \`$age' must be a nonnegative integer"
+	  func_fatal_error "\`$vinfo' is not valid version information"
+	  ;;
+	esac
+
+	if test "$age" -gt "$current"; then
+	  func_error "AGE \`$age' is greater than the current interface number \`$current'"
+	  func_fatal_error "\`$vinfo' is not valid version information"
+	fi
+
+	# Calculate the version variables.
+	major=
+	versuffix=
+	verstring=
+	case $version_type in
+	none) ;;
+
+	darwin)
+	  # Like Linux, but with the current version available in
+	  # verstring for coding it into the library header
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix="$major.$age.$revision"
+	  # Darwin ld doesn't like 0 for these options...
+	  func_arith $current + 1
+	  minor_current=$func_arith_result
+	  xlcverstring="${wl}-compatibility_version ${wl}$minor_current ${wl}-current_version ${wl}$minor_current.$revision"
+	  verstring="-compatibility_version $minor_current -current_version $minor_current.$revision"
+	  ;;
+
+	freebsd-aout)
+	  major=".$current"
+	  versuffix=".$current.$revision";
+	  ;;
+
+	freebsd-elf)
+	  major=".$current"
+	  versuffix=".$current"
+	  ;;
+
+	irix | nonstopux)
+	  if test "X$lt_irix_increment" = "Xno"; then
+	    func_arith $current - $age
+	  else
+	    func_arith $current - $age + 1
+	  fi
+	  major=$func_arith_result
+
+	  case $version_type in
+	    nonstopux) verstring_prefix=nonstopux ;;
+	    *)         verstring_prefix=sgi ;;
+	  esac
+	  verstring="$verstring_prefix$major.$revision"
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$revision
+	  while test "$loop" -ne 0; do
+	    func_arith $revision - $loop
+	    iface=$func_arith_result
+	    func_arith $loop - 1
+	    loop=$func_arith_result
+	    verstring="$verstring_prefix$major.$iface:$verstring"
+	  done
+
+	  # Before this point, $major must not contain `.'.
+	  major=.$major
+	  versuffix="$major.$revision"
+	  ;;
+
+	linux)
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix="$major.$age.$revision"
+	  ;;
+
+	osf)
+	  func_arith $current - $age
+	  major=.$func_arith_result
+	  versuffix=".$current.$age.$revision"
+	  verstring="$current.$age.$revision"
+
+	  # Add in all the interfaces that we are compatible with.
+	  loop=$age
+	  while test "$loop" -ne 0; do
+	    func_arith $current - $loop
+	    iface=$func_arith_result
+	    func_arith $loop - 1
+	    loop=$func_arith_result
+	    verstring="$verstring:${iface}.0"
+	  done
+
+	  # Make executables depend on our current version.
+	  verstring="$verstring:${current}.0"
+	  ;;
+
+	qnx)
+	  major=".$current"
+	  versuffix=".$current"
+	  ;;
+
+	sunos)
+	  major=".$current"
+	  versuffix=".$current.$revision"
+	  ;;
+
+	windows)
+	  # Use '-' rather than '.', since we only want one
+	  # extension on DOS 8.3 filesystems.
+	  func_arith $current - $age
+	  major=$func_arith_result
+	  versuffix="-$major"
+	  ;;
+
+	*)
+	  func_fatal_configuration "unknown library version type \`$version_type'"
+	  ;;
+	esac
+
+	# Clear the version info if we defaulted, and they specified a release.
+	if test -z "$vinfo" && test -n "$release"; then
+	  major=
+	  case $version_type in
+	  darwin)
+	    # we can't check for "0.0" in archive_cmds due to quoting
+	    # problems, so we reset it completely
+	    verstring=
+	    ;;
+	  *)
+	    verstring="0.0"
+	    ;;
+	  esac
+	  if test "$need_version" = no; then
+	    versuffix=
+	  else
+	    versuffix=".0.0"
+	  fi
+	fi
+
+	# Remove version info from name if versioning should be avoided
+	if test "$avoid_version" = yes && test "$need_version" = no; then
+	  major=
+	  versuffix=
+	  verstring=""
+	fi
+
+	# Check to see if the archive will have undefined symbols.
+	if test "$allow_undefined" = yes; then
+	  if test "$allow_undefined_flag" = unsupported; then
+	    func_warning "undefined symbols not allowed in $host shared libraries"
+	    build_libtool_libs=no
+	    build_old_libs=yes
+	  fi
+	else
+	  # Don't allow undefined symbols.
+	  allow_undefined_flag="$no_undefined_flag"
+	fi
+
+      fi
+
+      func_generate_dlsyms "$libname" "$libname" "yes"
+      libobjs="$libobjs $symfileobj"
+      test "X$libobjs" = "X " && libobjs=
+
+      if test "$mode" != relink; then
+	# Remove our outputs, but don't remove object files since they
+	# may have been created when compiling PIC objects.
+	removelist=
+	tempremovelist=`$ECHO "$output_objdir/*"`
+	for p in $tempremovelist; do
+	  case $p in
+	    *.$objext | *.gcno)
+	       ;;
+	    $output_objdir/$outputname | $output_objdir/$libname.* | $output_objdir/${libname}${release}.*)
+	       if test "X$precious_files_regex" != "X"; then
+		 if $ECHO "$p" | $EGREP -e "$precious_files_regex" >/dev/null 2>&1
+		 then
+		   continue
+		 fi
+	       fi
+	       removelist="$removelist $p"
+	       ;;
+	    *) ;;
+	  esac
+	done
+	test -n "$removelist" && \
+	  func_show_eval "${RM}r \$removelist"
+      fi
+
+      # Now set the variables for building old libraries.
+      if test "$build_old_libs" = yes && test "$build_libtool_libs" != convenience ; then
+	oldlibs="$oldlibs $output_objdir/$libname.$libext"
+
+	# Transform .lo files to .o files.
+	oldobjs="$objs "`$ECHO "X$libobjs" | $SP2NL | $Xsed -e '/\.'${libext}'$/d' -e "$lo2o" | $NL2SP`
+      fi
+
+      # Eliminate all temporary directories.
+      #for path in $notinst_path; do
+      #	lib_search_path=`$ECHO "X$lib_search_path " | $Xsed -e "s% $path % %g"`
+      #	deplibs=`$ECHO "X$deplibs " | $Xsed -e "s% -L$path % %g"`
+      #	dependency_libs=`$ECHO "X$dependency_libs " | $Xsed -e "s% -L$path % %g"`
+      #done
+
+      if test -n "$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	temp_xrpath=
+	for libdir in $xrpath; do
+	  temp_xrpath="$temp_xrpath -R$libdir"
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_rpath="$finalize_rpath $libdir" ;;
+	  esac
+	done
+	if test "$hardcode_into_libs" != yes || test "$build_old_libs" = yes; then
+	  dependency_libs="$temp_xrpath $dependency_libs"
+	fi
+      fi
+
+      # Make sure dlfiles contains only unique files that won't be dlpreopened
+      old_dlfiles="$dlfiles"
+      dlfiles=
+      for lib in $old_dlfiles; do
+	case " $dlprefiles $dlfiles " in
+	*" $lib "*) ;;
+	*) dlfiles="$dlfiles $lib" ;;
+	esac
+      done
+
+      # Make sure dlprefiles contains only unique files
+      old_dlprefiles="$dlprefiles"
+      dlprefiles=
+      for lib in $old_dlprefiles; do
+	case "$dlprefiles " in
+	*" $lib "*) ;;
+	*) dlprefiles="$dlprefiles $lib" ;;
+	esac
+      done
+
+      if test "$build_libtool_libs" = yes; then
+	if test -n "$rpath"; then
+	  case $host in
+	  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-*-beos* | *-cegcc*)
+	    # these systems don't actually have a c library (as such)!
+	    ;;
+	  *-*-rhapsody* | *-*-darwin1.[012])
+	    # Rhapsody C library is in the System framework
+	    deplibs="$deplibs System.ltframework"
+	    ;;
+	  *-*-netbsd*)
+	    # Don't link with libc until the a.out ld.so is fixed.
+	    ;;
+	  *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*)
+	    # Do not include libc due to us having libc/libc_r.
+	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+	    ;;
+	  *)
+	    # Add libc to deplibs on all other systems if necessary.
+	    if test "$build_libtool_need_lc" = "yes"; then
+	      deplibs="$deplibs -lc"
+	    fi
+	    ;;
+	  esac
+	fi
+
+	# Transform deplibs into only deplibs that can be linked in shared.
+	name_save=$name
+	libname_save=$libname
+	release_save=$release
+	versuffix_save=$versuffix
+	major_save=$major
+	# I'm not sure if I'm treating the release correctly.  I think
+	# release should show up in the -l (ie -lgmp5) so we don't want to
+	# add it in twice.  Is that correct?
+	release=""
+	versuffix=""
+	major=""
+	newdeplibs=
+	droppeddeps=no
+	case $deplibs_check_method in
+	pass_all)
+	  # Don't check for shared/static.  Everything works.
+	  # This might be a little naive.  We might want to check
+	  # whether the library exists or not.  But this is on
+	  # osf3 & osf4 and I'm not really sure... Just
+	  # implementing what was already the behavior.
+	  newdeplibs=$deplibs
+	  ;;
+	test_compile)
+	  # This code stresses the "libraries are programs" paradigm to its
+	  # limits. Maybe even breaks it.  We compile a program, linking it
+	  # against the deplibs as a proxy for the library.  Then we can check
+	  # whether they linked in statically or dynamically with ldd.
+	  $opt_dry_run || $RM conftest.c
+	  cat > conftest.c <<EOF
+	  int main() { return 0; }
+EOF
+	  $opt_dry_run || $RM conftest
+	  if $LTCC $LTCFLAGS -o conftest conftest.c $deplibs; then
+	    ldd_output=`ldd conftest`
+	    for i in $deplibs; do
+	      case $i in
+	      -l*)
+		func_stripname -l '' "$i"
+		name=$func_stripname_result
+		if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+		  case " $predeps $postdeps " in
+		  *" $i "*)
+		    newdeplibs="$newdeplibs $i"
+		    i=""
+		    ;;
+		  esac
+		fi
+		if test -n "$i" ; then
+		  libname=`eval "\\$ECHO \"$libname_spec\""`
+		  deplib_matches=`eval "\\$ECHO \"$library_names_spec\""`
+		  set dummy $deplib_matches; shift
+		  deplib_match=$1
+		  if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
+		    newdeplibs="$newdeplibs $i"
+		  else
+		    droppeddeps=yes
+		    $ECHO
+		    $ECHO "*** Warning: dynamic linker does not accept needed library $i."
+		    $ECHO "*** I have the capability to make that library automatically link in when"
+		    $ECHO "*** you link to this library.  But I can only do this if you have a"
+		    $ECHO "*** shared version of the library, which I believe you do not have"
+		    $ECHO "*** because a test_compile did reveal that the linker did not use it for"
+		    $ECHO "*** its dynamic dependency list that programs get resolved with at runtime."
+		  fi
+		fi
+		;;
+	      *)
+		newdeplibs="$newdeplibs $i"
+		;;
+	      esac
+	    done
+	  else
+	    # Error occurred in the first compile.  Let's try to salvage
+	    # the situation: Compile a separate program for each library.
+	    for i in $deplibs; do
+	      case $i in
+	      -l*)
+		func_stripname -l '' "$i"
+		name=$func_stripname_result
+		$opt_dry_run || $RM conftest
+		if $LTCC $LTCFLAGS -o conftest conftest.c $i; then
+		  ldd_output=`ldd conftest`
+		  if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+		    case " $predeps $postdeps " in
+		    *" $i "*)
+		      newdeplibs="$newdeplibs $i"
+		      i=""
+		      ;;
+		    esac
+		  fi
+		  if test -n "$i" ; then
+		    libname=`eval "\\$ECHO \"$libname_spec\""`
+		    deplib_matches=`eval "\\$ECHO \"$library_names_spec\""`
+		    set dummy $deplib_matches; shift
+		    deplib_match=$1
+		    if test `expr "$ldd_output" : ".*$deplib_match"` -ne 0 ; then
+		      newdeplibs="$newdeplibs $i"
+		    else
+		      droppeddeps=yes
+		      $ECHO
+		      $ECHO "*** Warning: dynamic linker does not accept needed library $i."
+		      $ECHO "*** I have the capability to make that library automatically link in when"
+		      $ECHO "*** you link to this library.  But I can only do this if you have a"
+		      $ECHO "*** shared version of the library, which you do not appear to have"
+		      $ECHO "*** because a test_compile did reveal that the linker did not use this one"
+		      $ECHO "*** as a dynamic dependency that programs can get resolved with at runtime."
+		    fi
+		  fi
+		else
+		  droppeddeps=yes
+		  $ECHO
+		  $ECHO "*** Warning!  Library $i is needed by this library but I was not able to"
+		  $ECHO "*** make it link in!  You will probably need to install it or some"
+		  $ECHO "*** library that it depends on before this library will be fully"
+		  $ECHO "*** functional.  Installing it before continuing would be even better."
+		fi
+		;;
+	      *)
+		newdeplibs="$newdeplibs $i"
+		;;
+	      esac
+	    done
+	  fi
+	  ;;
+	file_magic*)
+	  set dummy $deplibs_check_method; shift
+	  file_magic_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    case $a_deplib in
+	    -l*)
+	      func_stripname -l '' "$a_deplib"
+	      name=$func_stripname_result
+	      if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+		case " $predeps $postdeps " in
+		*" $a_deplib "*)
+		  newdeplibs="$newdeplibs $a_deplib"
+		  a_deplib=""
+		  ;;
+		esac
+	      fi
+	      if test -n "$a_deplib" ; then
+		libname=`eval "\\$ECHO \"$libname_spec\""`
+		for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		  potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
+		  for potent_lib in $potential_libs; do
+		      # Follow soft links.
+		      if ls -lLd "$potent_lib" 2>/dev/null |
+			 $GREP " -> " >/dev/null; then
+			continue
+		      fi
+		      # The statement above tries to avoid entering an
+		      # endless loop below, in case of cyclic links.
+		      # We might still enter an endless loop, since a link
+		      # loop can be closed while we follow links,
+		      # but so what?
+		      potlib="$potent_lib"
+		      while test -h "$potlib" 2>/dev/null; do
+			potliblink=`ls -ld $potlib | ${SED} 's/.* -> //'`
+			case $potliblink in
+			[\\/]* | [A-Za-z]:[\\/]*) potlib="$potliblink";;
+			*) potlib=`$ECHO "X$potlib" | $Xsed -e 's,[^/]*$,,'`"$potliblink";;
+			esac
+		      done
+		      if eval $file_magic_cmd \"\$potlib\" 2>/dev/null |
+			 $SED -e 10q |
+			 $EGREP "$file_magic_regex" > /dev/null; then
+			newdeplibs="$newdeplibs $a_deplib"
+			a_deplib=""
+			break 2
+		      fi
+		  done
+		done
+	      fi
+	      if test -n "$a_deplib" ; then
+		droppeddeps=yes
+		$ECHO
+		$ECHO "*** Warning: linker path does not have real file for library $a_deplib."
+		$ECHO "*** I have the capability to make that library automatically link in when"
+		$ECHO "*** you link to this library.  But I can only do this if you have a"
+		$ECHO "*** shared version of the library, which you do not appear to have"
+		$ECHO "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib" ; then
+		  $ECHO "*** with $libname but no candidates were found. (...for file magic test)"
+		else
+		  $ECHO "*** with $libname and none of the candidates passed a file format test"
+		  $ECHO "*** using a file magic. Last file checked: $potlib"
+		fi
+	      fi
+	      ;;
+	    *)
+	      # Add a -L argument.
+	      newdeplibs="$newdeplibs $a_deplib"
+	      ;;
+	    esac
+	  done # Gone through all deplibs.
+	  ;;
+	match_pattern*)
+	  set dummy $deplibs_check_method; shift
+	  match_pattern_regex=`expr "$deplibs_check_method" : "$1 \(.*\)"`
+	  for a_deplib in $deplibs; do
+	    case $a_deplib in
+	    -l*)
+	      func_stripname -l '' "$a_deplib"
+	      name=$func_stripname_result
+	      if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+		case " $predeps $postdeps " in
+		*" $a_deplib "*)
+		  newdeplibs="$newdeplibs $a_deplib"
+		  a_deplib=""
+		  ;;
+		esac
+	      fi
+	      if test -n "$a_deplib" ; then
+		libname=`eval "\\$ECHO \"$libname_spec\""`
+		for i in $lib_search_path $sys_lib_search_path $shlib_search_path; do
+		  potential_libs=`ls $i/$libname[.-]* 2>/dev/null`
+		  for potent_lib in $potential_libs; do
+		    potlib="$potent_lib" # see symlink-check above in file_magic test
+		    if eval "\$ECHO \"X$potent_lib\"" 2>/dev/null | $Xsed -e 10q | \
+		       $EGREP "$match_pattern_regex" > /dev/null; then
+		      newdeplibs="$newdeplibs $a_deplib"
+		      a_deplib=""
+		      break 2
+		    fi
+		  done
+		done
+	      fi
+	      if test -n "$a_deplib" ; then
+		droppeddeps=yes
+		$ECHO
+		$ECHO "*** Warning: linker path does not have real file for library $a_deplib."
+		$ECHO "*** I have the capability to make that library automatically link in when"
+		$ECHO "*** you link to this library.  But I can only do this if you have a"
+		$ECHO "*** shared version of the library, which you do not appear to have"
+		$ECHO "*** because I did check the linker path looking for a file starting"
+		if test -z "$potlib" ; then
+		  $ECHO "*** with $libname but no candidates were found. (...for regex pattern test)"
+		else
+		  $ECHO "*** with $libname and none of the candidates passed a file format test"
+		  $ECHO "*** using a regex pattern. Last file checked: $potlib"
+		fi
+	      fi
+	      ;;
+	    *)
+	      # Add a -L argument.
+	      newdeplibs="$newdeplibs $a_deplib"
+	      ;;
+	    esac
+	  done # Gone through all deplibs.
+	  ;;
+	none | unknown | *)
+	  newdeplibs=""
+	  tmp_deplibs=`$ECHO "X $deplibs" | $Xsed \
+	      -e 's/ -lc$//' -e 's/ -[LR][^ ]*//g'`
+	  if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then
+	    for i in $predeps $postdeps ; do
+	      # can't use Xsed below, because $i might contain '/'
+	      tmp_deplibs=`$ECHO "X $tmp_deplibs" | $Xsed -e "s,$i,,"`
+	    done
+	  fi
+	  if $ECHO "X $tmp_deplibs" | $Xsed -e 's/[	 ]//g' |
+	     $GREP . >/dev/null; then
+	    $ECHO
+	    if test "X$deplibs_check_method" = "Xnone"; then
+	      $ECHO "*** Warning: inter-library dependencies are not supported in this platform."
+	    else
+	      $ECHO "*** Warning: inter-library dependencies are not known to be supported."
+	    fi
+	    $ECHO "*** All declared inter-library dependencies are being dropped."
+	    droppeddeps=yes
+	  fi
+	  ;;
+	esac
+	versuffix=$versuffix_save
+	major=$major_save
+	release=$release_save
+	libname=$libname_save
+	name=$name_save
+
+	case $host in
+	*-*-rhapsody* | *-*-darwin1.[012])
+	  # On Rhapsody replace the C library with the System framework
+	  newdeplibs=`$ECHO "X $newdeplibs" | $Xsed -e 's/ -lc / System.ltframework /'`
+	  ;;
+	esac
+
+	if test "$droppeddeps" = yes; then
+	  if test "$module" = yes; then
+	    $ECHO
+	    $ECHO "*** Warning: libtool could not satisfy all declared inter-library"
+	    $ECHO "*** dependencies of module $libname.  Therefore, libtool will create"
+	    $ECHO "*** a static module, that should work as long as the dlopening"
+	    $ECHO "*** application is linked with the -dlopen flag."
+	    if test -z "$global_symbol_pipe"; then
+	      $ECHO
+	      $ECHO "*** However, this would only work if libtool was able to extract symbol"
+	      $ECHO "*** lists from a program, using \`nm' or equivalent, but libtool could"
+	      $ECHO "*** not find such a program.  So, this module is probably useless."
+	      $ECHO "*** \`nm' from GNU binutils and a full rebuild may help."
+	    fi
+	    if test "$build_old_libs" = no; then
+	      oldlibs="$output_objdir/$libname.$libext"
+	      build_libtool_libs=module
+	      build_old_libs=yes
+	    else
+	      build_libtool_libs=no
+	    fi
+	  else
+	    $ECHO "*** The inter-library dependencies that have been dropped here will be"
+	    $ECHO "*** automatically added whenever a program is linked with this library"
+	    $ECHO "*** or is declared to -dlopen it."
+
+	    if test "$allow_undefined" = no; then
+	      $ECHO
+	      $ECHO "*** Since this library must not contain undefined symbols,"
+	      $ECHO "*** because either the platform does not support them or"
+	      $ECHO "*** it was explicitly requested with -no-undefined,"
+	      $ECHO "*** libtool will only create a static version of it."
+	      if test "$build_old_libs" = no; then
+		oldlibs="$output_objdir/$libname.$libext"
+		build_libtool_libs=module
+		build_old_libs=yes
+	      else
+		build_libtool_libs=no
+	      fi
+	    fi
+	  fi
+	fi
+	# Done checking deplibs!
+	deplibs=$newdeplibs
+      fi
+      # Time to change all our "foo.ltframework" stuff back to "-framework foo"
+      case $host in
+	*-*-darwin*)
+	  newdeplibs=`$ECHO "X $newdeplibs" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  new_inherited_linker_flags=`$ECHO "X $new_inherited_linker_flags" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  deplibs=`$ECHO "X $deplibs" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	  ;;
+      esac
+
+      # move library search paths that coincide with paths to not yet
+      # installed libraries to the beginning of the library search list
+      new_libs=
+      for path in $notinst_path; do
+	case " $new_libs " in
+	*" -L$path/$objdir "*) ;;
+	*)
+	  case " $deplibs " in
+	  *" -L$path/$objdir "*)
+	    new_libs="$new_libs -L$path/$objdir" ;;
+	  esac
+	  ;;
+	esac
+      done
+      for deplib in $deplibs; do
+	case $deplib in
+	-L*)
+	  case " $new_libs " in
+	  *" $deplib "*) ;;
+	  *) new_libs="$new_libs $deplib" ;;
+	  esac
+	  ;;
+	*) new_libs="$new_libs $deplib" ;;
+	esac
+      done
+      deplibs="$new_libs"
+
+      # All the library-specific variables (install_libdir is set above).
+      library_names=
+      old_library=
+      dlname=
+
+      # Test again, we may have decided not to build it any more
+      if test "$build_libtool_libs" = yes; then
+	if test "$hardcode_into_libs" = yes; then
+	  # Hardcode the library paths
+	  hardcode_libdirs=
+	  dep_rpath=
+	  rpath="$finalize_rpath"
+	  test "$mode" != relink && rpath="$compile_rpath$rpath"
+	  for libdir in $rpath; do
+	    if test -n "$hardcode_libdir_flag_spec"; then
+	      if test -n "$hardcode_libdir_separator"; then
+		if test -z "$hardcode_libdirs"; then
+		  hardcode_libdirs="$libdir"
+		else
+		  # Just accumulate the unique libdirs.
+		  case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+		  *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		    ;;
+		  *)
+		    hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		    ;;
+		  esac
+		fi
+	      else
+		eval flag=\"$hardcode_libdir_flag_spec\"
+		dep_rpath="$dep_rpath $flag"
+	      fi
+	    elif test -n "$runpath_var"; then
+	      case "$perm_rpath " in
+	      *" $libdir "*) ;;
+	      *) perm_rpath="$perm_rpath $libdir" ;;
+	      esac
+	    fi
+	  done
+	  # Substitute the hardcoded libdirs into the rpath.
+	  if test -n "$hardcode_libdir_separator" &&
+	     test -n "$hardcode_libdirs"; then
+	    libdir="$hardcode_libdirs"
+	    if test -n "$hardcode_libdir_flag_spec_ld"; then
+	      eval dep_rpath=\"$hardcode_libdir_flag_spec_ld\"
+	    else
+	      eval dep_rpath=\"$hardcode_libdir_flag_spec\"
+	    fi
+	  fi
+	  if test -n "$runpath_var" && test -n "$perm_rpath"; then
+	    # We should set the runpath_var.
+	    rpath=
+	    for dir in $perm_rpath; do
+	      rpath="$rpath$dir:"
+	    done
+	    eval "$runpath_var='$rpath\$$runpath_var'; export $runpath_var"
+	  fi
+	  test -n "$dep_rpath" && deplibs="$dep_rpath $deplibs"
+	fi
+
+	shlibpath="$finalize_shlibpath"
+	test "$mode" != relink && shlibpath="$compile_shlibpath$shlibpath"
+	if test -n "$shlibpath"; then
+	  eval "$shlibpath_var='$shlibpath\$$shlibpath_var'; export $shlibpath_var"
+	fi
+
+	# Get the real and link names of the library.
+	eval shared_ext=\"$shrext_cmds\"
+	eval library_names=\"$library_names_spec\"
+	set dummy $library_names
+	shift
+	realname="$1"
+	shift
+
+	if test -n "$soname_spec"; then
+	  eval soname=\"$soname_spec\"
+	else
+	  soname="$realname"
+	fi
+	if test -z "$dlname"; then
+	  dlname=$soname
+	fi
+
+	lib="$output_objdir/$realname"
+	linknames=
+	for link
+	do
+	  linknames="$linknames $link"
+	done
+
+	# Use standard objects if they are pic
+	test -z "$pic_flag" && libobjs=`$ECHO "X$libobjs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+	test "X$libobjs" = "X " && libobjs=
+
+	delfiles=
+	if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	  $opt_dry_run || cp "$export_symbols" "$output_objdir/$libname.uexp"
+	  export_symbols="$output_objdir/$libname.uexp"
+	  delfiles="$delfiles $export_symbols"
+	fi
+
+	orig_export_symbols=
+	case $host_os in
+	cygwin* | mingw* | cegcc*)
+	  if test -n "$export_symbols" && test -z "$export_symbols_regex"; then
+	    # exporting using user supplied symfile
+	    if test "x`$SED 1q $export_symbols`" != xEXPORTS; then
+	      # and it's NOT already a .def file. Must figure out
+	      # which of the given symbols are data symbols and tag
+	      # them as such. So, trigger use of export_symbols_cmds.
+	      # export_symbols gets reassigned inside the "prepare
+	      # the list of exported symbols" if statement, so the
+	      # include_expsyms logic still works.
+	      orig_export_symbols="$export_symbols"
+	      export_symbols=
+	      always_export_symbols=yes
+	    fi
+	  fi
+	  ;;
+	esac
+
+	# Prepare the list of exported symbols
+	if test -z "$export_symbols"; then
+	  if test "$always_export_symbols" = yes || test -n "$export_symbols_regex"; then
+	    func_verbose "generating symbol list for \`$libname.la'"
+	    export_symbols="$output_objdir/$libname.exp"
+	    $opt_dry_run || $RM $export_symbols
+	    cmds=$export_symbols_cmds
+	    save_ifs="$IFS"; IFS='~'
+	    for cmd in $cmds; do
+	      IFS="$save_ifs"
+	      eval cmd=\"$cmd\"
+	      func_len " $cmd"
+	      len=$func_len_result
+	      if test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
+		func_show_eval "$cmd" 'exit $?'
+		skipped_export=false
+	      else
+		# The command line is too long to execute in one step.
+		func_verbose "using reloadable object file for export list..."
+		skipped_export=:
+		# Break out early, otherwise skipped_export may be
+		# set to false by a later but shorter cmd.
+		break
+	      fi
+	    done
+	    IFS="$save_ifs"
+	    if test -n "$export_symbols_regex" && test "X$skipped_export" != "X:"; then
+	      func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"'
+	      func_show_eval '$MV "${export_symbols}T" "$export_symbols"'
+	    fi
+	  fi
+	fi
+
+	if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	  tmp_export_symbols="$export_symbols"
+	  test -n "$orig_export_symbols" && tmp_export_symbols="$orig_export_symbols"
+	  $opt_dry_run || eval '$ECHO "X$include_expsyms" | $Xsed | $SP2NL >> "$tmp_export_symbols"'
+	fi
+
+	if test "X$skipped_export" != "X:" && test -n "$orig_export_symbols"; then
+	  # The given exports_symbols file has to be filtered, so filter it.
+	  func_verbose "filter symbol list for \`$libname.la' to tag DATA exports"
+	  # FIXME: $output_objdir/$libname.filter potentially contains lots of
+	  # 's' commands which not all seds can handle. GNU sed should be fine
+	  # though. Also, the filter scales superlinearly with the number of
+	  # global variables. join(1) would be nice here, but unfortunately
+	  # isn't a blessed tool.
+	  $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter
+	  delfiles="$delfiles $export_symbols $output_objdir/$libname.filter"
+	  export_symbols=$output_objdir/$libname.def
+	  $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols
+	fi
+
+	tmp_deplibs=
+	for test_deplib in $deplibs; do
+	  case " $convenience " in
+	  *" $test_deplib "*) ;;
+	  *)
+	    tmp_deplibs="$tmp_deplibs $test_deplib"
+	    ;;
+	  esac
+	done
+	deplibs="$tmp_deplibs"
+
+	if test -n "$convenience"; then
+	  if test -n "$whole_archive_flag_spec" &&
+	    test "$compiler_needs_object" = yes &&
+	    test -z "$libobjs"; then
+	    # extract the archives, so we have objects to list.
+	    # TODO: could optimize this to just extract one archive.
+	    whole_archive_flag_spec=
+	  fi
+	  if test -n "$whole_archive_flag_spec"; then
+	    save_libobjs=$libobjs
+	    eval libobjs=\"\$libobjs $whole_archive_flag_spec\"
+	    test "X$libobjs" = "X " && libobjs=
+	  else
+	    gentop="$output_objdir/${outputname}x"
+	    generated="$generated $gentop"
+
+	    func_extract_archives $gentop $convenience
+	    libobjs="$libobjs $func_extract_archives_result"
+	    test "X$libobjs" = "X " && libobjs=
+	  fi
+	fi
+
+	if test "$thread_safe" = yes && test -n "$thread_safe_flag_spec"; then
+	  eval flag=\"$thread_safe_flag_spec\"
+	  linker_flags="$linker_flags $flag"
+	fi
+
+	# Make a backup of the uninstalled library when relinking
+	if test "$mode" = relink; then
+	  $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}U && $MV $realname ${realname}U)' || exit $?
+	fi
+
+	# Do each of the archive commands.
+	if test "$module" = yes && test -n "$module_cmds" ; then
+	  if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then
+	    eval test_cmds=\"$module_expsym_cmds\"
+	    cmds=$module_expsym_cmds
+	  else
+	    eval test_cmds=\"$module_cmds\"
+	    cmds=$module_cmds
+	  fi
+	else
+	  if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then
+	    eval test_cmds=\"$archive_expsym_cmds\"
+	    cmds=$archive_expsym_cmds
+	  else
+	    eval test_cmds=\"$archive_cmds\"
+	    cmds=$archive_cmds
+	  fi
+	fi
+
+	if test "X$skipped_export" != "X:" &&
+	   func_len " $test_cmds" &&
+	   len=$func_len_result &&
+	   test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
+	  :
+	else
+	  # The command line is too long to link in one step, link piecewise
+	  # or, if using GNU ld and skipped_export is not :, use a linker
+	  # script.
+
+	  # Save the value of $output and $libobjs because we want to
+	  # use them later.  If we have whole_archive_flag_spec, we
+	  # want to use save_libobjs as it was before
+	  # whole_archive_flag_spec was expanded, because we can't
+	  # assume the linker understands whole_archive_flag_spec.
+	  # This may have to be revisited, in case too many
+	  # convenience libraries get linked in and end up exceeding
+	  # the spec.
+	  if test -z "$convenience" || test -z "$whole_archive_flag_spec"; then
+	    save_libobjs=$libobjs
+	  fi
+	  save_output=$output
+	  output_la=`$ECHO "X$output" | $Xsed -e "$basename"`
+
+	  # Clear the reloadable object creation command queue and
+	  # initialize k to one.
+	  test_cmds=
+	  concat_cmds=
+	  objlist=
+	  last_robj=
+	  k=1
+
+	  if test -n "$save_libobjs" && test "X$skipped_export" != "X:" && test "$with_gnu_ld" = yes; then
+	    output=${output_objdir}/${output_la}.lnkscript
+	    func_verbose "creating GNU ld script: $output"
+	    $ECHO 'INPUT (' > $output
+	    for obj in $save_libobjs
+	    do
+	      $ECHO "$obj" >> $output
+	    done
+	    $ECHO ')' >> $output
+	    delfiles="$delfiles $output"
+	  elif test -n "$save_libobjs" && test "X$skipped_export" != "X:" && test "X$file_list_spec" != X; then
+	    output=${output_objdir}/${output_la}.lnk
+	    func_verbose "creating linker input file list: $output"
+	    : > $output
+	    set x $save_libobjs
+	    shift
+	    firstobj=
+	    if test "$compiler_needs_object" = yes; then
+	      firstobj="$1 "
+	      shift
+	    fi
+	    for obj
+	    do
+	      $ECHO "$obj" >> $output
+	    done
+	    delfiles="$delfiles $output"
+	    output=$firstobj\"$file_list_spec$output\"
+	  else
+	    if test -n "$save_libobjs"; then
+	      func_verbose "creating reloadable object files..."
+	      output=$output_objdir/$output_la-${k}.$objext
+	      eval test_cmds=\"$reload_cmds\"
+	      func_len " $test_cmds"
+	      len0=$func_len_result
+	      len=$len0
+
+	      # Loop over the list of objects to be linked.
+	      for obj in $save_libobjs
+	      do
+		func_len " $obj"
+		func_arith $len + $func_len_result
+		len=$func_arith_result
+		if test "X$objlist" = X ||
+		   test "$len" -lt "$max_cmd_len"; then
+		  func_append objlist " $obj"
+		else
+		  # The command $test_cmds is almost too long, add a
+		  # command to the queue.
+		  if test "$k" -eq 1 ; then
+		    # The first file doesn't have a previous command to add.
+		    eval concat_cmds=\"$reload_cmds $objlist $last_robj\"
+		  else
+		    # All subsequent reloadable object files will link in
+		    # the last one created.
+		    eval concat_cmds=\"\$concat_cmds~$reload_cmds $objlist $last_robj~\$RM $last_robj\"
+		  fi
+		  last_robj=$output_objdir/$output_la-${k}.$objext
+		  func_arith $k + 1
+		  k=$func_arith_result
+		  output=$output_objdir/$output_la-${k}.$objext
+		  objlist=$obj
+		  func_len " $last_robj"
+		  func_arith $len0 + $func_len_result
+		  len=$func_arith_result
+		fi
+	      done
+	      # Handle the remaining objects by creating one last
+	      # reloadable object file.  All subsequent reloadable object
+	      # files will link in the last one created.
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      eval concat_cmds=\"\${concat_cmds}$reload_cmds $objlist $last_robj\"
+	      if test -n "$last_robj"; then
+	        eval concat_cmds=\"\${concat_cmds}~\$RM $last_robj\"
+	      fi
+	      delfiles="$delfiles $output"
+
+	    else
+	      output=
+	    fi
+
+	    if ${skipped_export-false}; then
+	      func_verbose "generating symbol list for \`$libname.la'"
+	      export_symbols="$output_objdir/$libname.exp"
+	      $opt_dry_run || $RM $export_symbols
+	      libobjs=$output
+	      # Append the command to create the export file.
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      eval concat_cmds=\"\$concat_cmds$export_symbols_cmds\"
+	      if test -n "$last_robj"; then
+		eval concat_cmds=\"\$concat_cmds~\$RM $last_robj\"
+	      fi
+	    fi
+
+	    test -n "$save_libobjs" &&
+	      func_verbose "creating a temporary reloadable object file: $output"
+
+	    # Loop through the commands generated above and execute them.
+	    save_ifs="$IFS"; IFS='~'
+	    for cmd in $concat_cmds; do
+	      IFS="$save_ifs"
+	      $opt_silent || {
+		  func_quote_for_expand "$cmd"
+		  eval "func_echo $func_quote_for_expand_result"
+	      }
+	      $opt_dry_run || eval "$cmd" || {
+		lt_exit=$?
+
+		# Restore the uninstalled library and exit
+		if test "$mode" = relink; then
+		  ( cd "$output_objdir" && \
+		    $RM "${realname}T" && \
+		    $MV "${realname}U" "$realname" )
+		fi
+
+		exit $lt_exit
+	      }
+	    done
+	    IFS="$save_ifs"
+
+	    if test -n "$export_symbols_regex" && ${skipped_export-false}; then
+	      func_show_eval '$EGREP -e "$export_symbols_regex" "$export_symbols" > "${export_symbols}T"'
+	      func_show_eval '$MV "${export_symbols}T" "$export_symbols"'
+	    fi
+	  fi
+
+          if ${skipped_export-false}; then
+	    if test -n "$export_symbols" && test -n "$include_expsyms"; then
+	      tmp_export_symbols="$export_symbols"
+	      test -n "$orig_export_symbols" && tmp_export_symbols="$orig_export_symbols"
+	      $opt_dry_run || eval '$ECHO "X$include_expsyms" | $Xsed | $SP2NL >> "$tmp_export_symbols"'
+	    fi
+
+	    if test -n "$orig_export_symbols"; then
+	      # The given exports_symbols file has to be filtered, so filter it.
+	      func_verbose "filter symbol list for \`$libname.la' to tag DATA exports"
+	      # FIXME: $output_objdir/$libname.filter potentially contains lots of
+	      # 's' commands which not all seds can handle. GNU sed should be fine
+	      # though. Also, the filter scales superlinearly with the number of
+	      # global variables. join(1) would be nice here, but unfortunately
+	      # isn't a blessed tool.
+	      $opt_dry_run || $SED -e '/[ ,]DATA/!d;s,\(.*\)\([ \,].*\),s|^\1$|\1\2|,' < $export_symbols > $output_objdir/$libname.filter
+	      delfiles="$delfiles $export_symbols $output_objdir/$libname.filter"
+	      export_symbols=$output_objdir/$libname.def
+	      $opt_dry_run || $SED -f $output_objdir/$libname.filter < $orig_export_symbols > $export_symbols
+	    fi
+	  fi
+
+	  libobjs=$output
+	  # Restore the value of output.
+	  output=$save_output
+
+	  if test -n "$convenience" && test -n "$whole_archive_flag_spec"; then
+	    eval libobjs=\"\$libobjs $whole_archive_flag_spec\"
+	    test "X$libobjs" = "X " && libobjs=
+	  fi
+	  # Expand the library linking commands again to reset the
+	  # value of $libobjs for piecewise linking.
+
+	  # Do each of the archive commands.
+	  if test "$module" = yes && test -n "$module_cmds" ; then
+	    if test -n "$export_symbols" && test -n "$module_expsym_cmds"; then
+	      cmds=$module_expsym_cmds
+	    else
+	      cmds=$module_cmds
+	    fi
+	  else
+	    if test -n "$export_symbols" && test -n "$archive_expsym_cmds"; then
+	      cmds=$archive_expsym_cmds
+	    else
+	      cmds=$archive_cmds
+	    fi
+	  fi
+	fi
+
+	if test -n "$delfiles"; then
+	  # Append the command to remove temporary files to $cmds.
+	  eval cmds=\"\$cmds~\$RM $delfiles\"
+	fi
+
+	# Add any objects from preloaded convenience libraries
+	if test -n "$dlprefiles"; then
+	  gentop="$output_objdir/${outputname}x"
+	  generated="$generated $gentop"
+
+	  func_extract_archives $gentop $dlprefiles
+	  libobjs="$libobjs $func_extract_archives_result"
+	  test "X$libobjs" = "X " && libobjs=
+	fi
+
+	save_ifs="$IFS"; IFS='~'
+	for cmd in $cmds; do
+	  IFS="$save_ifs"
+	  eval cmd=\"$cmd\"
+	  $opt_silent || {
+	    func_quote_for_expand "$cmd"
+	    eval "func_echo $func_quote_for_expand_result"
+	  }
+	  $opt_dry_run || eval "$cmd" || {
+	    lt_exit=$?
+
+	    # Restore the uninstalled library and exit
+	    if test "$mode" = relink; then
+	      ( cd "$output_objdir" && \
+	        $RM "${realname}T" && \
+		$MV "${realname}U" "$realname" )
+	    fi
+
+	    exit $lt_exit
+	  }
+	done
+	IFS="$save_ifs"
+
+	# Restore the uninstalled library and exit
+	if test "$mode" = relink; then
+	  $opt_dry_run || eval '(cd $output_objdir && $RM ${realname}T && $MV $realname ${realname}T && $MV ${realname}U $realname)' || exit $?
+
+	  if test -n "$convenience"; then
+	    if test -z "$whole_archive_flag_spec"; then
+	      func_show_eval '${RM}r "$gentop"'
+	    fi
+	  fi
+
+	  exit $EXIT_SUCCESS
+	fi
+
+	# Create links to the real library.
+	for linkname in $linknames; do
+	  if test "$realname" != "$linkname"; then
+	    func_show_eval '(cd "$output_objdir" && $RM "$linkname" && $LN_S "$realname" "$linkname")' 'exit $?'
+	  fi
+	done
+
+	# If -module or -export-dynamic was specified, set the dlname.
+	if test "$module" = yes || test "$export_dynamic" = yes; then
+	  # On all known operating systems, these are identical.
+	  dlname="$soname"
+	fi
+      fi
+      ;;
+
+    obj)
+      if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then
+	func_warning "\`-dlopen' is ignored for objects"
+      fi
+
+      case " $deplibs" in
+      *\ -l* | *\ -L*)
+	func_warning "\`-l' and \`-L' are ignored for objects" ;;
+      esac
+
+      test -n "$rpath" && \
+	func_warning "\`-rpath' is ignored for objects"
+
+      test -n "$xrpath" && \
+	func_warning "\`-R' is ignored for objects"
+
+      test -n "$vinfo" && \
+	func_warning "\`-version-info' is ignored for objects"
+
+      test -n "$release" && \
+	func_warning "\`-release' is ignored for objects"
+
+      case $output in
+      *.lo)
+	test -n "$objs$old_deplibs" && \
+	  func_fatal_error "cannot build library object \`$output' from non-libtool objects"
+
+	libobj=$output
+	func_lo2o "$libobj"
+	obj=$func_lo2o_result
+	;;
+      *)
+	libobj=
+	obj="$output"
+	;;
+      esac
+
+      # Delete the old objects.
+      $opt_dry_run || $RM $obj $libobj
+
+      # Objects from convenience libraries.  This assumes
+      # single-version convenience libraries.  Whenever we create
+      # different ones for PIC/non-PIC, this we'll have to duplicate
+      # the extraction.
+      reload_conv_objs=
+      gentop=
+      # reload_cmds runs $LD directly, so let us get rid of
+      # -Wl from whole_archive_flag_spec and hope we can get by with
+      # turning comma into space..
+      wl=
+
+      if test -n "$convenience"; then
+	if test -n "$whole_archive_flag_spec"; then
+	  eval tmp_whole_archive_flags=\"$whole_archive_flag_spec\"
+	  reload_conv_objs=$reload_objs\ `$ECHO "X$tmp_whole_archive_flags" | $Xsed -e 's|,| |g'`
+	else
+	  gentop="$output_objdir/${obj}x"
+	  generated="$generated $gentop"
+
+	  func_extract_archives $gentop $convenience
+	  reload_conv_objs="$reload_objs $func_extract_archives_result"
+	fi
+      fi
+
+      # Create the old-style object.
+      reload_objs="$objs$old_deplibs "`$ECHO "X$libobjs" | $SP2NL | $Xsed -e '/\.'${libext}$'/d' -e '/\.lib$/d' -e "$lo2o" | $NL2SP`" $reload_conv_objs" ### testsuite: skip nested quoting test
+
+      output="$obj"
+      func_execute_cmds "$reload_cmds" 'exit $?'
+
+      # Exit if we aren't doing a library object file.
+      if test -z "$libobj"; then
+	if test -n "$gentop"; then
+	  func_show_eval '${RM}r "$gentop"'
+	fi
+
+	exit $EXIT_SUCCESS
+      fi
+
+      if test "$build_libtool_libs" != yes; then
+	if test -n "$gentop"; then
+	  func_show_eval '${RM}r "$gentop"'
+	fi
+
+	# Create an invalid libtool object if no PIC, so that we don't
+	# accidentally link it into a program.
+	# $show "echo timestamp > $libobj"
+	# $opt_dry_run || eval "echo timestamp > $libobj" || exit $?
+	exit $EXIT_SUCCESS
+      fi
+
+      if test -n "$pic_flag" || test "$pic_mode" != default; then
+	# Only do commands if we really have different PIC objects.
+	reload_objs="$libobjs $reload_conv_objs"
+	output="$libobj"
+	func_execute_cmds "$reload_cmds" 'exit $?'
+      fi
+
+      if test -n "$gentop"; then
+	func_show_eval '${RM}r "$gentop"'
+      fi
+
+      exit $EXIT_SUCCESS
+      ;;
+
+    prog)
+      case $host in
+	*cygwin*) func_stripname '' '.exe' "$output"
+	          output=$func_stripname_result.exe;;
+      esac
+      test -n "$vinfo" && \
+	func_warning "\`-version-info' is ignored for programs"
+
+      test -n "$release" && \
+	func_warning "\`-release' is ignored for programs"
+
+      test "$preload" = yes \
+        && test "$dlopen_support" = unknown \
+	&& test "$dlopen_self" = unknown \
+	&& test "$dlopen_self_static" = unknown && \
+	  func_warning "\`LT_INIT([dlopen])' not used. Assuming no dlopen support."
+
+      case $host in
+      *-*-rhapsody* | *-*-darwin1.[012])
+	# On Rhapsody replace the C library is the System framework
+	compile_deplibs=`$ECHO "X $compile_deplibs" | $Xsed -e 's/ -lc / System.ltframework /'`
+	finalize_deplibs=`$ECHO "X $finalize_deplibs" | $Xsed -e 's/ -lc / System.ltframework /'`
+	;;
+      esac
+
+      case $host in
+      *-*-darwin*)
+	# Don't allow lazy linking, it breaks C++ global constructors
+	# But is supposedly fixed on 10.4 or later (yay!).
+	if test "$tagname" = CXX ; then
+	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
+	    10.[0123])
+	      compile_command="$compile_command ${wl}-bind_at_load"
+	      finalize_command="$finalize_command ${wl}-bind_at_load"
+	    ;;
+	  esac
+	fi
+	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
+	compile_deplibs=`$ECHO "X $compile_deplibs" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	finalize_deplibs=`$ECHO "X $finalize_deplibs" | $Xsed -e 's% \([^ $]*\).ltframework% -framework \1%g'`
+	;;
+      esac
+
+
+      # move library search paths that coincide with paths to not yet
+      # installed libraries to the beginning of the library search list
+      new_libs=
+      for path in $notinst_path; do
+	case " $new_libs " in
+	*" -L$path/$objdir "*) ;;
+	*)
+	  case " $compile_deplibs " in
+	  *" -L$path/$objdir "*)
+	    new_libs="$new_libs -L$path/$objdir" ;;
+	  esac
+	  ;;
+	esac
+      done
+      for deplib in $compile_deplibs; do
+	case $deplib in
+	-L*)
+	  case " $new_libs " in
+	  *" $deplib "*) ;;
+	  *) new_libs="$new_libs $deplib" ;;
+	  esac
+	  ;;
+	*) new_libs="$new_libs $deplib" ;;
+	esac
+      done
+      compile_deplibs="$new_libs"
+
+
+      compile_command="$compile_command $compile_deplibs"
+      finalize_command="$finalize_command $finalize_deplibs"
+
+      if test -n "$rpath$xrpath"; then
+	# If the user specified any rpath flags, then add them.
+	for libdir in $rpath $xrpath; do
+	  # This is the magic to use -rpath.
+	  case "$finalize_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_rpath="$finalize_rpath $libdir" ;;
+	  esac
+	done
+      fi
+
+      # Now hardcode the library paths
+      rpath=
+      hardcode_libdirs=
+      for libdir in $compile_rpath $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs="$libdir"
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    rpath="$rpath $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) perm_rpath="$perm_rpath $libdir" ;;
+	  esac
+	fi
+	case $host in
+	*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*)
+	  testbindir=`${ECHO} "$libdir" | ${SED} -e 's*/lib$*/bin*'`
+	  case :$dllsearchpath: in
+	  *":$libdir:"*) ;;
+	  ::) dllsearchpath=$libdir;;
+	  *) dllsearchpath="$dllsearchpath:$libdir";;
+	  esac
+	  case :$dllsearchpath: in
+	  *":$testbindir:"*) ;;
+	  ::) dllsearchpath=$testbindir;;
+	  *) dllsearchpath="$dllsearchpath:$testbindir";;
+	  esac
+	  ;;
+	esac
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir="$hardcode_libdirs"
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      compile_rpath="$rpath"
+
+      rpath=
+      hardcode_libdirs=
+      for libdir in $finalize_rpath; do
+	if test -n "$hardcode_libdir_flag_spec"; then
+	  if test -n "$hardcode_libdir_separator"; then
+	    if test -z "$hardcode_libdirs"; then
+	      hardcode_libdirs="$libdir"
+	    else
+	      # Just accumulate the unique libdirs.
+	      case $hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator in
+	      *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
+		;;
+	      *)
+		hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
+		;;
+	      esac
+	    fi
+	  else
+	    eval flag=\"$hardcode_libdir_flag_spec\"
+	    rpath="$rpath $flag"
+	  fi
+	elif test -n "$runpath_var"; then
+	  case "$finalize_perm_rpath " in
+	  *" $libdir "*) ;;
+	  *) finalize_perm_rpath="$finalize_perm_rpath $libdir" ;;
+	  esac
+	fi
+      done
+      # Substitute the hardcoded libdirs into the rpath.
+      if test -n "$hardcode_libdir_separator" &&
+	 test -n "$hardcode_libdirs"; then
+	libdir="$hardcode_libdirs"
+	eval rpath=\" $hardcode_libdir_flag_spec\"
+      fi
+      finalize_rpath="$rpath"
+
+      if test -n "$libobjs" && test "$build_old_libs" = yes; then
+	# Transform all the library objects into standard objects.
+	compile_command=`$ECHO "X$compile_command" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+	finalize_command=`$ECHO "X$finalize_command" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP`
+      fi
+
+      func_generate_dlsyms "$outputname" "@PROGRAM@" "no"
+
+      # template prelinking step
+      if test -n "$prelink_cmds"; then
+	func_execute_cmds "$prelink_cmds" 'exit $?'
+      fi
+
+      wrappers_required=yes
+      case $host in
+      *cygwin* | *mingw* )
+        if test "$build_libtool_libs" != yes; then
+          wrappers_required=no
+        fi
+        ;;
+      *cegcc)
+        # Disable wrappers for cegcc, we are cross compiling anyway.
+        wrappers_required=no
+        ;;
+      *)
+        if test "$need_relink" = no || test "$build_libtool_libs" != yes; then
+          wrappers_required=no
+        fi
+        ;;
+      esac
+      if test "$wrappers_required" = no; then
+	# Replace the output file specification.
+	compile_command=`$ECHO "X$compile_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
+	link_command="$compile_command$compile_rpath"
+
+	# We have no uninstalled library dependencies, so finalize right now.
+	exit_status=0
+	func_show_eval "$link_command" 'exit_status=$?'
+
+	# Delete the generated files.
+	if test -f "$output_objdir/${outputname}S.${objext}"; then
+	  func_show_eval '$RM "$output_objdir/${outputname}S.${objext}"'
+	fi
+
+	exit $exit_status
+      fi
+
+      if test -n "$compile_shlibpath$finalize_shlibpath"; then
+	compile_command="$shlibpath_var=\"$compile_shlibpath$finalize_shlibpath\$$shlibpath_var\" $compile_command"
+      fi
+      if test -n "$finalize_shlibpath"; then
+	finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command"
+      fi
+
+      compile_var=
+      finalize_var=
+      if test -n "$runpath_var"; then
+	if test -n "$perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $perm_rpath; do
+	    rpath="$rpath$dir:"
+	  done
+	  compile_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+	if test -n "$finalize_perm_rpath"; then
+	  # We should set the runpath_var.
+	  rpath=
+	  for dir in $finalize_perm_rpath; do
+	    rpath="$rpath$dir:"
+	  done
+	  finalize_var="$runpath_var=\"$rpath\$$runpath_var\" "
+	fi
+      fi
+
+      if test "$no_install" = yes; then
+	# We don't need to create a wrapper script.
+	link_command="$compile_var$compile_command$compile_rpath"
+	# Replace the output file specification.
+	link_command=`$ECHO "X$link_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
+	# Delete the old output file.
+	$opt_dry_run || $RM $output
+	# Link the executable and exit
+	func_show_eval "$link_command" 'exit $?'
+	exit $EXIT_SUCCESS
+      fi
+
+      if test "$hardcode_action" = relink; then
+	# Fast installation is not supported
+	link_command="$compile_var$compile_command$compile_rpath"
+	relink_command="$finalize_var$finalize_command$finalize_rpath"
+
+	func_warning "this platform does not like uninstalled shared libraries"
+	func_warning "\`$output' will be relinked during installation"
+      else
+	if test "$fast_install" != no; then
+	  link_command="$finalize_var$compile_command$finalize_rpath"
+	  if test "$fast_install" = yes; then
+	    relink_command=`$ECHO "X$compile_var$compile_command$compile_rpath" | $Xsed -e 's%@OUTPUT@%\$progdir/\$file%g'`
+	  else
+	    # fast_install is set to needless
+	    relink_command=
+	  fi
+	else
+	  link_command="$compile_var$compile_command$compile_rpath"
+	  relink_command="$finalize_var$finalize_command$finalize_rpath"
+	fi
+      fi
+
+      # Replace the output file specification.
+      link_command=`$ECHO "X$link_command" | $Xsed -e 's%@OUTPUT@%'"$output_objdir/$outputname"'%g'`
+
+      # Delete the old output files.
+      $opt_dry_run || $RM $output $output_objdir/$outputname $output_objdir/lt-$outputname
+
+      func_show_eval "$link_command" 'exit $?'
+
+      # Now create the wrapper script.
+      func_verbose "creating $output"
+
+      # Quote the relink command for shipping.
+      if test -n "$relink_command"; then
+	# Preserve any variables that may affect compiler behavior
+	for var in $variables_saved_for_relink; do
+	  if eval test -z \"\${$var+set}\"; then
+	    relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command"
+	  elif eval var_value=\$$var; test -z "$var_value"; then
+	    relink_command="$var=; export $var; $relink_command"
+	  else
+	    func_quote_for_eval "$var_value"
+	    relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command"
+	  fi
+	done
+	relink_command="(cd `pwd`; $relink_command)"
+	relink_command=`$ECHO "X$relink_command" | $Xsed -e "$sed_quote_subst"`
+      fi
+
+      # Quote $ECHO for shipping.
+      if test "X$ECHO" = "X$SHELL $progpath --fallback-echo"; then
+	case $progpath in
+	[\\/]* | [A-Za-z]:[\\/]*) qecho="$SHELL $progpath --fallback-echo";;
+	*) qecho="$SHELL `pwd`/$progpath --fallback-echo";;
+	esac
+	qecho=`$ECHO "X$qecho" | $Xsed -e "$sed_quote_subst"`
+      else
+	qecho=`$ECHO "X$ECHO" | $Xsed -e "$sed_quote_subst"`
+      fi
+
+      # Only actually do things if not in dry run mode.
+      $opt_dry_run || {
+	# win32 will think the script is a binary if it has
+	# a .exe suffix, so we strip it off here.
+	case $output in
+	  *.exe) func_stripname '' '.exe' "$output"
+	         output=$func_stripname_result ;;
+	esac
+	# test for cygwin because mv fails w/o .exe extensions
+	case $host in
+	  *cygwin*)
+	    exeext=.exe
+	    func_stripname '' '.exe' "$outputname"
+	    outputname=$func_stripname_result ;;
+	  *) exeext= ;;
+	esac
+	case $host in
+	  *cygwin* | *mingw* )
+	    func_dirname_and_basename "$output" "" "."
+	    output_name=$func_basename_result
+	    output_path=$func_dirname_result
+	    cwrappersource="$output_path/$objdir/lt-$output_name.c"
+	    cwrapper="$output_path/$output_name.exe"
+	    $RM $cwrappersource $cwrapper
+	    trap "$RM $cwrappersource $cwrapper; exit $EXIT_FAILURE" 1 2 15
+
+	    func_emit_cwrapperexe_src > $cwrappersource
+
+	    # The wrapper executable is built using the $host compiler,
+	    # because it contains $host paths and files. If cross-
+	    # compiling, it, like the target executable, must be
+	    # executed on the $host or under an emulation environment.
+	    $opt_dry_run || {
+	      $LTCC $LTCFLAGS -o $cwrapper $cwrappersource
+	      $STRIP $cwrapper
+	    }
+
+	    # Now, create the wrapper script for func_source use:
+	    func_ltwrapper_scriptname $cwrapper
+	    $RM $func_ltwrapper_scriptname_result
+	    trap "$RM $func_ltwrapper_scriptname_result; exit $EXIT_FAILURE" 1 2 15
+	    $opt_dry_run || {
+	      # note: this script will not be executed, so do not chmod.
+	      if test "x$build" = "x$host" ; then
+		$cwrapper --lt-dump-script > $func_ltwrapper_scriptname_result
+	      else
+		func_emit_wrapper no > $func_ltwrapper_scriptname_result
+	      fi
+	    }
+	  ;;
+	  * )
+	    $RM $output
+	    trap "$RM $output; exit $EXIT_FAILURE" 1 2 15
+
+	    func_emit_wrapper no > $output
+	    chmod +x $output
+	  ;;
+	esac
+      }
+      exit $EXIT_SUCCESS
+      ;;
+    esac
+
+    # See if we need to build an old-fashioned archive.
+    for oldlib in $oldlibs; do
+
+      if test "$build_libtool_libs" = convenience; then
+	oldobjs="$libobjs_save $symfileobj"
+	addlibs="$convenience"
+	build_libtool_libs=no
+      else
+	if test "$build_libtool_libs" = module; then
+	  oldobjs="$libobjs_save"
+	  build_libtool_libs=no
+	else
+	  oldobjs="$old_deplibs $non_pic_objects"
+	  if test "$preload" = yes && test -f "$symfileobj"; then
+	    oldobjs="$oldobjs $symfileobj"
+	  fi
+	fi
+	addlibs="$old_convenience"
+      fi
+
+      if test -n "$addlibs"; then
+	gentop="$output_objdir/${outputname}x"
+	generated="$generated $gentop"
+
+	func_extract_archives $gentop $addlibs
+	oldobjs="$oldobjs $func_extract_archives_result"
+      fi
+
+      # Do each command in the archive commands.
+      if test -n "$old_archive_from_new_cmds" && test "$build_libtool_libs" = yes; then
+	cmds=$old_archive_from_new_cmds
+      else
+
+	# Add any objects from preloaded convenience libraries
+	if test -n "$dlprefiles"; then
+	  gentop="$output_objdir/${outputname}x"
+	  generated="$generated $gentop"
+
+	  func_extract_archives $gentop $dlprefiles
+	  oldobjs="$oldobjs $func_extract_archives_result"
+	fi
+
+	# POSIX demands no paths to be encoded in archives.  We have
+	# to avoid creating archives with duplicate basenames if we
+	# might have to extract them afterwards, e.g., when creating a
+	# static archive out of a convenience library, or when linking
+	# the entirety of a libtool archive into another (currently
+	# not supported by libtool).
+	if (for obj in $oldobjs
+	    do
+	      func_basename "$obj"
+	      $ECHO "$func_basename_result"
+	    done | sort | sort -uc >/dev/null 2>&1); then
+	  :
+	else
+	  $ECHO "copying selected object files to avoid basename conflicts..."
+	  gentop="$output_objdir/${outputname}x"
+	  generated="$generated $gentop"
+	  func_mkdir_p "$gentop"
+	  save_oldobjs=$oldobjs
+	  oldobjs=
+	  counter=1
+	  for obj in $save_oldobjs
+	  do
+	    func_basename "$obj"
+	    objbase="$func_basename_result"
+	    case " $oldobjs " in
+	    " ") oldobjs=$obj ;;
+	    *[\ /]"$objbase "*)
+	      while :; do
+		# Make sure we don't pick an alternate name that also
+		# overlaps.
+		newobj=lt$counter-$objbase
+		func_arith $counter + 1
+		counter=$func_arith_result
+		case " $oldobjs " in
+		*[\ /]"$newobj "*) ;;
+		*) if test ! -f "$gentop/$newobj"; then break; fi ;;
+		esac
+	      done
+	      func_show_eval "ln $obj $gentop/$newobj || cp $obj $gentop/$newobj"
+	      oldobjs="$oldobjs $gentop/$newobj"
+	      ;;
+	    *) oldobjs="$oldobjs $obj" ;;
+	    esac
+	  done
+	fi
+	eval cmds=\"$old_archive_cmds\"
+
+	func_len " $cmds"
+	len=$func_len_result
+	if test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
+	  cmds=$old_archive_cmds
+	else
+	  # the command line is too long to link in one step, link in parts
+	  func_verbose "using piecewise archive linking..."
+	  save_RANLIB=$RANLIB
+	  RANLIB=:
+	  objlist=
+	  concat_cmds=
+	  save_oldobjs=$oldobjs
+	  oldobjs=
+	  # Is there a better way of finding the last object in the list?
+	  for obj in $save_oldobjs
+	  do
+	    last_oldobj=$obj
+	  done
+	  eval test_cmds=\"$old_archive_cmds\"
+	  func_len " $test_cmds"
+	  len0=$func_len_result
+	  len=$len0
+	  for obj in $save_oldobjs
+	  do
+	    func_len " $obj"
+	    func_arith $len + $func_len_result
+	    len=$func_arith_result
+	    func_append objlist " $obj"
+	    if test "$len" -lt "$max_cmd_len"; then
+	      :
+	    else
+	      # the above command should be used before it gets too long
+	      oldobjs=$objlist
+	      if test "$obj" = "$last_oldobj" ; then
+		RANLIB=$save_RANLIB
+	      fi
+	      test -z "$concat_cmds" || concat_cmds=$concat_cmds~
+	      eval concat_cmds=\"\${concat_cmds}$old_archive_cmds\"
+	      objlist=
+	      len=$len0
+	    fi
+	  done
+	  RANLIB=$save_RANLIB
+	  oldobjs=$objlist
+	  if test "X$oldobjs" = "X" ; then
+	    eval cmds=\"\$concat_cmds\"
+	  else
+	    eval cmds=\"\$concat_cmds~\$old_archive_cmds\"
+	  fi
+	fi
+      fi
+      func_execute_cmds "$cmds" 'exit $?'
+    done
+
+    test -n "$generated" && \
+      func_show_eval "${RM}r$generated"
+
+    # Now create the libtool archive.
+    case $output in
+    *.la)
+      old_library=
+      test "$build_old_libs" = yes && old_library="$libname.$libext"
+      func_verbose "creating $output"
+
+      # Preserve any variables that may affect compiler behavior
+      for var in $variables_saved_for_relink; do
+	if eval test -z \"\${$var+set}\"; then
+	  relink_command="{ test -z \"\${$var+set}\" || $lt_unset $var || { $var=; export $var; }; }; $relink_command"
+	elif eval var_value=\$$var; test -z "$var_value"; then
+	  relink_command="$var=; export $var; $relink_command"
+	else
+	  func_quote_for_eval "$var_value"
+	  relink_command="$var=$func_quote_for_eval_result; export $var; $relink_command"
+	fi
+      done
+      # Quote the link command for shipping.
+      relink_command="(cd `pwd`; $SHELL $progpath $preserve_args --mode=relink $libtool_args @inst_prefix_dir@)"
+      relink_command=`$ECHO "X$relink_command" | $Xsed -e "$sed_quote_subst"`
+      if test "$hardcode_automatic" = yes ; then
+	relink_command=
+      fi
+
+      # Only create the output if not a dry run.
+      $opt_dry_run || {
+	for installed in no yes; do
+	  if test "$installed" = yes; then
+	    if test -z "$install_libdir"; then
+	      break
+	    fi
+	    output="$output_objdir/$outputname"i
+	    # Replace all uninstalled libtool libraries with the installed ones
+	    newdependency_libs=
+	    for deplib in $dependency_libs; do
+	      case $deplib in
+	      *.la)
+		func_basename "$deplib"
+		name="$func_basename_result"
+		eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $deplib`
+		test -z "$libdir" && \
+		  func_fatal_error "\`$deplib' is not a valid libtool archive"
+		newdependency_libs="$newdependency_libs $libdir/$name"
+		;;
+	      *) newdependency_libs="$newdependency_libs $deplib" ;;
+	      esac
+	    done
+	    dependency_libs="$newdependency_libs"
+	    newdlfiles=
+
+	    for lib in $dlfiles; do
+	      case $lib in
+	      *.la)
+	        func_basename "$lib"
+		name="$func_basename_result"
+		eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+		test -z "$libdir" && \
+		  func_fatal_error "\`$lib' is not a valid libtool archive"
+		newdlfiles="$newdlfiles $libdir/$name"
+		;;
+	      *) newdlfiles="$newdlfiles $lib" ;;
+	      esac
+	    done
+	    dlfiles="$newdlfiles"
+	    newdlprefiles=
+	    for lib in $dlprefiles; do
+	      case $lib in
+	      *.la)
+		# Only pass preopened files to the pseudo-archive (for
+		# eventual linking with the app. that links it) if we
+		# didn't already link the preopened objects directly into
+		# the library:
+		func_basename "$lib"
+		name="$func_basename_result"
+		eval libdir=`${SED} -n -e 's/^libdir=\(.*\)$/\1/p' $lib`
+		test -z "$libdir" && \
+		  func_fatal_error "\`$lib' is not a valid libtool archive"
+		newdlprefiles="$newdlprefiles $libdir/$name"
+		;;
+	      esac
+	    done
+	    dlprefiles="$newdlprefiles"
+	  else
+	    newdlfiles=
+	    for lib in $dlfiles; do
+	      case $lib in
+		[\\/]* | [A-Za-z]:[\\/]*) abs="$lib" ;;
+		*) abs=`pwd`"/$lib" ;;
+	      esac
+	      newdlfiles="$newdlfiles $abs"
+	    done
+	    dlfiles="$newdlfiles"
+	    newdlprefiles=
+	    for lib in $dlprefiles; do
+	      case $lib in
+		[\\/]* | [A-Za-z]:[\\/]*) abs="$lib" ;;
+		*) abs=`pwd`"/$lib" ;;
+	      esac
+	      newdlprefiles="$newdlprefiles $abs"
+	    done
+	    dlprefiles="$newdlprefiles"
+	  fi
+	  $RM $output
+	  # place dlname in correct position for cygwin
+	  tdlname=$dlname
+	  case $host,$output,$installed,$module,$dlname in
+	    *cygwin*,*lai,yes,no,*.dll | *mingw*,*lai,yes,no,*.dll | *cegcc*,*lai,yes,no,*.dll) tdlname=../bin/$dlname ;;
+	  esac
+	  $ECHO > $output "\
+# $outputname - a libtool library file
+# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION
+#
+# Please DO NOT delete this file!
+# It is necessary for linking the library.
+
+# The name that we can dlopen(3).
+dlname='$tdlname'
+
+# Names of this library.
+library_names='$library_names'
+
+# The name of the static archive.
+old_library='$old_library'
+
+# Linker flags that can not go in dependency_libs.
+inherited_linker_flags='$new_inherited_linker_flags'
+
+# Libraries that this one depends upon.
+dependency_libs='$dependency_libs'
+
+# Names of additional weak libraries provided by this library
+weak_library_names='$weak_libs'
+
+# Version information for $libname.
+current=$current
+age=$age
+revision=$revision
+
+# Is this an already installed library?
+installed=$installed
+
+# Should we warn about portability when linking against -modules?
+shouldnotlink=$module
+
+# Files to dlopen/dlpreopen
+dlopen='$dlfiles'
+dlpreopen='$dlprefiles'
+
+# Directory that this library needs to be installed in:
+libdir='$install_libdir'"
+	  if test "$installed" = no && test "$need_relink" = yes; then
+	    $ECHO >> $output "\
+relink_command=\"$relink_command\""
+	  fi
+	done
+      }
+
+      # Do a symbolic link so that the libtool archive can be found in
+      # LD_LIBRARY_PATH before the program is installed.
+      func_show_eval '( cd "$output_objdir" && $RM "$outputname" && $LN_S "../$outputname" "$outputname" )' 'exit $?'
+      ;;
+    esac
+    exit $EXIT_SUCCESS
+}
+
+{ test "$mode" = link || test "$mode" = relink; } &&
+    func_mode_link ${1+"$@"}
+
+
+# func_mode_uninstall arg...
+func_mode_uninstall ()
+{
+    $opt_debug
+    RM="$nonopt"
+    files=
+    rmforce=
+    exit_status=0
+
+    # This variable tells wrapper scripts just to set variables rather
+    # than running their programs.
+    libtool_install_magic="$magic"
+
+    for arg
+    do
+      case $arg in
+      -f) RM="$RM $arg"; rmforce=yes ;;
+      -*) RM="$RM $arg" ;;
+      *) files="$files $arg" ;;
+      esac
+    done
+
+    test -z "$RM" && \
+      func_fatal_help "you must specify an RM program"
+
+    rmdirs=
+
+    origobjdir="$objdir"
+    for file in $files; do
+      func_dirname "$file" "" "."
+      dir="$func_dirname_result"
+      if test "X$dir" = X.; then
+	objdir="$origobjdir"
+      else
+	objdir="$dir/$origobjdir"
+      fi
+      func_basename "$file"
+      name="$func_basename_result"
+      test "$mode" = uninstall && objdir="$dir"
+
+      # Remember objdir for removal later, being careful to avoid duplicates
+      if test "$mode" = clean; then
+	case " $rmdirs " in
+	  *" $objdir "*) ;;
+	  *) rmdirs="$rmdirs $objdir" ;;
+	esac
+      fi
+
+      # Don't error if the file doesn't exist and rm -f was used.
+      if { test -L "$file"; } >/dev/null 2>&1 ||
+	 { test -h "$file"; } >/dev/null 2>&1 ||
+	 test -f "$file"; then
+	:
+      elif test -d "$file"; then
+	exit_status=1
+	continue
+      elif test "$rmforce" = yes; then
+	continue
+      fi
+
+      rmfiles="$file"
+
+      case $name in
+      *.la)
+	# Possibly a libtool archive, so verify it.
+	if func_lalib_p "$file"; then
+	  func_source $dir/$name
+
+	  # Delete the libtool libraries and symlinks.
+	  for n in $library_names; do
+	    rmfiles="$rmfiles $objdir/$n"
+	  done
+	  test -n "$old_library" && rmfiles="$rmfiles $objdir/$old_library"
+
+	  case "$mode" in
+	  clean)
+	    case "  $library_names " in
+	    # "  " in the beginning catches empty $dlname
+	    *" $dlname "*) ;;
+	    *) rmfiles="$rmfiles $objdir/$dlname" ;;
+	    esac
+	    test -n "$libdir" && rmfiles="$rmfiles $objdir/$name $objdir/${name}i"
+	    ;;
+	  uninstall)
+	    if test -n "$library_names"; then
+	      # Do each command in the postuninstall commands.
+	      func_execute_cmds "$postuninstall_cmds" 'test "$rmforce" = yes || exit_status=1'
+	    fi
+
+	    if test -n "$old_library"; then
+	      # Do each command in the old_postuninstall commands.
+	      func_execute_cmds "$old_postuninstall_cmds" 'test "$rmforce" = yes || exit_status=1'
+	    fi
+	    # FIXME: should reinstall the best remaining shared library.
+	    ;;
+	  esac
+	fi
+	;;
+
+      *.lo)
+	# Possibly a libtool object, so verify it.
+	if func_lalib_p "$file"; then
+
+	  # Read the .lo file
+	  func_source $dir/$name
+
+	  # Add PIC object to the list of files to remove.
+	  if test -n "$pic_object" &&
+	     test "$pic_object" != none; then
+	    rmfiles="$rmfiles $dir/$pic_object"
+	  fi
+
+	  # Add non-PIC object to the list of files to remove.
+	  if test -n "$non_pic_object" &&
+	     test "$non_pic_object" != none; then
+	    rmfiles="$rmfiles $dir/$non_pic_object"
+	  fi
+	fi
+	;;
+
+      *)
+	if test "$mode" = clean ; then
+	  noexename=$name
+	  case $file in
+	  *.exe)
+	    func_stripname '' '.exe' "$file"
+	    file=$func_stripname_result
+	    func_stripname '' '.exe' "$name"
+	    noexename=$func_stripname_result
+	    # $file with .exe has already been added to rmfiles,
+	    # add $file without .exe
+	    rmfiles="$rmfiles $file"
+	    ;;
+	  esac
+	  # Do a test to see if this is a libtool program.
+	  if func_ltwrapper_p "$file"; then
+	    if func_ltwrapper_executable_p "$file"; then
+	      func_ltwrapper_scriptname "$file"
+	      relink_command=
+	      func_source $func_ltwrapper_scriptname_result
+	      rmfiles="$rmfiles $func_ltwrapper_scriptname_result"
+	    else
+	      relink_command=
+	      func_source $dir/$noexename
+	    fi
+
+	    # note $name still contains .exe if it was in $file originally
+	    # as does the version of $file that was added into $rmfiles
+	    rmfiles="$rmfiles $objdir/$name $objdir/${name}S.${objext}"
+	    if test "$fast_install" = yes && test -n "$relink_command"; then
+	      rmfiles="$rmfiles $objdir/lt-$name"
+	    fi
+	    if test "X$noexename" != "X$name" ; then
+	      rmfiles="$rmfiles $objdir/lt-${noexename}.c"
+	    fi
+	  fi
+	fi
+	;;
+      esac
+      func_show_eval "$RM $rmfiles" 'exit_status=1'
+    done
+    objdir="$origobjdir"
+
+    # Try to remove the ${objdir}s in the directories where we deleted files
+    for dir in $rmdirs; do
+      if test -d "$dir"; then
+	func_show_eval "rmdir $dir >/dev/null 2>&1"
+      fi
+    done
+
+    exit $exit_status
+}
+
+{ test "$mode" = uninstall || test "$mode" = clean; } &&
+    func_mode_uninstall ${1+"$@"}
+
+test -z "$mode" && {
+  help="$generic_help"
+  func_fatal_help "you must specify a MODE"
+}
+
+test -z "$exec_cmd" && \
+  func_fatal_help "invalid operation mode \`$mode'"
+
+if test -n "$exec_cmd"; then
+  eval exec "$exec_cmd"
+  exit $EXIT_FAILURE
+fi
+
+exit $exit_status
+
+
+# The TAGs below are defined such that we never get into a situation
+# in which we disable both kinds of libraries.  Given conflicting
+# choices, we go for a static library, that is the most portable,
+# since we can't tell whether shared libraries were disabled because
+# the user asked for that or because the platform doesn't support
+# them.  This is particularly important on AIX, because we don't
+# support having both static and shared libraries enabled at the same
+# time on that platform, so we default to a shared-only configuration.
+# If a disable-shared tag is given, we'll fallback to a static-only
+# configuration.  But we'll never go from static-only to shared-only.
+
+# ### BEGIN LIBTOOL TAG CONFIG: disable-shared
+build_libtool_libs=no
+build_old_libs=yes
+# ### END LIBTOOL TAG CONFIG: disable-shared
+
+# ### BEGIN LIBTOOL TAG CONFIG: disable-static
+build_old_libs=`case $build_libtool_libs in yes) echo no;; *) echo yes;; esac`
+# ### END LIBTOOL TAG CONFIG: disable-static
+
+# Local Variables:
+# mode:shell-script
+# sh-indentation:2
+# End:
+# vi:sw=2
+
diff --git a/m4/ax_check_compiler_flags.m4 b/m4/ax_check_compiler_flags.m4
new file mode 100644
index 0000000..05e5c3b
--- /dev/null
+++ b/m4/ax_check_compiler_flags.m4
@@ -0,0 +1,78 @@
+# ===========================================================================
+#        http://autoconf-archive.cryp.to/ax_check_compiler_flags.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE])
+#
+# DESCRIPTION
+#
+#   Check whether the given compiler FLAGS work with the current language's
+#   compiler, or whether they give an error. (Warnings, however, are
+#   ignored.)
+#
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+# LAST MODIFICATION
+#
+#   2008-04-12
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#   Copyright (c) 2008 Matteo Frigo
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Macro Archive. When you make and
+#   distribute a modified version of the Autoconf Macro, you may extend this
+#   special exception to the GPL to apply to your modified version as well.
+
+AC_DEFUN([AX_CHECK_COMPILER_FLAGS],
+[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
+AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1])
+dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
+AS_LITERAL_IF([$1],
+  [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1), [
+      ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
+      _AC_LANG_PREFIX[]FLAGS="$1"
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
+        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
+      _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])],
+  [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
+   _AC_LANG_PREFIX[]FLAGS="$1"
+   AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
+     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
+   _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])
+eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)
+AC_MSG_RESULT($ax_check_compiler_flags)
+if test "x$ax_check_compiler_flags" = xyes; then
+	m4_default([$2], :)
+else
+	m4_default([$3], :)
+fi
+])dnl AX_CHECK_COMPILER_FLAGS
diff --git a/m4/ax_ext.m4 b/m4/ax_ext.m4
new file mode 100644
index 0000000..41536f7
--- /dev/null
+++ b/m4/ax_ext.m4
@@ -0,0 +1,122 @@
+# ===========================================================================
+#                 http://autoconf-archive.cryp.to/ax_ext.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_EXT
+#
+# DESCRIPTION
+#
+#   Find supported SIMD extensions by requesting cpuid. When an SIMD
+#   extension is found, the -m"simdextensionname" is added to SIMD_FLAGS
+#   (only if compilator support it) (ie : if "sse2" is available "-msse2" is
+#   added to SIMD_FLAGS)
+#
+#   This macro calls:
+#
+#     AC_SUBST(SIMD_FLAGS)
+#
+#   And defines:
+#
+#     HAVE_MMX / HAVE_SSE / HAVE_SSE2 / HAVE_SSE3 / HAVE_SSSE3
+#
+# LAST MODIFICATION
+#
+#   2008-04-12
+#   2009-04-23  Mark Asbach <markasbach@users.sourceforge.net<
+#               Renamed cache variables so they adhere naming convention
+#               Corrected M4 quoting for AX_CHECK_COMPILER_FLAGS
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Christophe Tournayre <turn3r@users.sourceforge.net>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
+
+AC_DEFUN([AX_EXT],
+[
+  AC_REQUIRE([AX_GCC_X86_CPUID])
+  
+  AX_GCC_X86_CPUID([0x00000001])
+  if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+    ecx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 3`
+    edx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4`
+  fi
+  
+  AC_CACHE_CHECK([whether mmx is supported], [ax_cv_have_mmx_ext],
+  [
+    ax_cv_have_mmx_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$edx>>23&0x01))" = 1; then
+        ax_cv_have_mmx_ext=yes
+      fi
+    fi
+  ])
+
+  AC_CACHE_CHECK([whether sse is supported], [ax_cv_have_sse_ext],
+  [
+    ax_cv_have_sse_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$edx>>25&0x01))" = 1; then
+        ax_cv_have_sse_ext=yes
+      fi
+    fi
+  ])
+
+  AC_CACHE_CHECK([whether sse2 is supported], [ax_cv_have_sse2_ext],
+  [
+    ax_cv_have_sse2_ext=no
+    if test "$((0x$edx>>26&0x01))" = 1; then
+      ax_cv_have_sse2_ext=yes
+    fi
+  ])
+
+  AC_CACHE_CHECK([whether sse3 is supported], [ax_cv_have_sse3_ext],
+  [
+    ax_cv_have_sse3_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$ecx&0x01))" = 1; then
+        ax_cv_have_sse3_ext=yes
+      fi
+    fi
+  ])
+
+  AC_CACHE_CHECK([whether ssse3 is supported], [ax_cv_have_ssse3_ext],
+  [
+    ax_cv_have_ssse3_ext=no
+    if test "$ax_cv_gcc_x86_cpuid_0x00000001" != "unknown"; then
+      if test "$((0x$ecx>>9&0x01))" = 1; then
+        ax_cv_have_ssse3_ext=yes
+      fi
+    fi
+  ])
+
+  if test "$ax_cv_have_mmx_ext" = yes; then
+    AC_DEFINE(HAVE_MMX,,[Support mmx instructions])
+    AX_CHECK_COMPILER_FLAGS([-mmmx], [SIMD_FLAGS="$SIMD_FLAGS -mmmx"], [])
+  fi
+
+  if test "$ax_cv_have_sse_ext" = yes; then
+    AC_DEFINE(HAVE_SSE,,[Support SSE (Streaming SIMD Extensions) instructions])
+    AX_CHECK_COMPILER_FLAGS([-msse], [SIMD_FLAGS="$SIMD_FLAGS -msse"], [])
+  fi
+
+  if test "$ax_cv_have_sse2_ext" = yes; then
+    AC_DEFINE(HAVE_SSE2,,[Support SSE2 (Streaming SIMD Extensions 2) instructions])
+    AX_CHECK_COMPILER_FLAGS([-msse2], [SIMD_FLAGS="$SIMD_FLAGS -msse2"], [])
+  fi
+
+  if test "$ax_cv_have_sse3_ext" = yes; then
+    AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
+    AX_CHECK_COMPILER_FLAGS([-msse3], [SIMD_FLAGS="$SIMD_FLAGS -msse3"], [])
+  fi
+
+  if test "$ax_cv_have_ssse3_ext" = yes; then
+    AC_DEFINE(HAVE_SSSE3,,[Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions])
+  fi
+
+  AC_SUBST(SIMD_FLAGS)
+])
diff --git a/m4/ax_gcc_x86_cpuid.m4 b/m4/ax_gcc_x86_cpuid.m4
new file mode 100644
index 0000000..e9231b8
--- /dev/null
+++ b/m4/ax_gcc_x86_cpuid.m4
@@ -0,0 +1,65 @@
+dnl @synopsis AX_GCC_X86_CPUID(OP)
+dnl @summary run x86 cpuid instruction OP using gcc inline assembler
+dnl @category Misc
+dnl
+dnl On Pentium and later x86 processors, with gcc or a compiler that
+dnl has a compatible syntax for inline assembly instructions, run
+dnl a small program that executes the cpuid instruction with
+dnl input OP.  This can be used to detect the CPU type.
+dnl
+dnl On output, the values of the eax, ebx, ecx, and edx registers
+dnl are stored as hexadecimal strings as "eax:ebx:ecx:edx" in
+dnl the cache variable ax_cv_gcc_x86_cpuid_OP.
+dnl
+dnl If the cpuid instruction fails (because you are running a cross-compiler,
+dnl or because you are not using gcc, or because you are on a processor
+dnl that doesn't have this instruction), ax_cv_gcc_x86_cpuid_OP is set
+dnl to the string "unknown".
+dnl
+dnl This macro mainly exists to be used in AX_GCC_ARCHFLAG.
+dnl
+dnl @version 2008-12-06
+dnl @license GPLWithACException
+dnl @author Steven G. Johnson <stevenj@alum.mit.edu> and Matteo Frigo.
+AC_DEFUN([AX_GCC_X86_CPUID],
+[AC_REQUIRE([AC_PROG_CC])
+AC_LANG_PUSH([C])
+AC_CACHE_CHECK([for x86 cpuid $1 output], [ax_cv_gcc_x86_cpuid_$1],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [
+     int op = $1, eax, ebx, ecx, edx;
+     FILE *f;
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64)
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "pop %%rbx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%rbx\n\t"
+             "cpuid\n\t"
+             "mov %%rbx, %%rax\n\t"
+             "pop %%rbx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#else
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "pop %%ebx"
+             : "=a" (eax), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+     __asm__("push %%ebx\n\t"
+             "cpuid\n\t"
+             "mov %%ebx, %%eax\n\t"
+             "pop %%ebx"
+             : "=a" (ebx), "=c" (ecx), "=d" (edx)
+             : "a" (op));
+#endif
+     f = fopen("conftest_cpuid", "w"); if (!f) return 1;
+     fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
+     fclose(f);
+     return 0;
+])], 
+     [ax_cv_gcc_x86_cpuid_$1=`cat conftest_cpuid`; rm -f conftest_cpuid],
+     [ax_cv_gcc_x86_cpuid_$1=unknown; rm -f conftest_cpuid],
+     [ax_cv_gcc_x86_cpuid_$1=unknown])])
+AC_LANG_POP([C])
+])
diff --git a/m4/libtool.m4 b/m4/libtool.m4
new file mode 100644
index 0000000..a3fee53
--- /dev/null
+++ b/m4/libtool.m4
@@ -0,0 +1,7377 @@
+# libtool.m4 - Configure libtool for the host system. -*-Autoconf-*-
+#
+#   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
+#                 2006, 2007, 2008 Free Software Foundation, Inc.
+#   Written by Gordon Matzigkeit, 1996
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+m4_define([_LT_COPYING], [dnl
+#   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
+#                 2006, 2007, 2008 Free Software Foundation, Inc.
+#   Written by Gordon Matzigkeit, 1996
+#
+#   This file is part of GNU Libtool.
+#
+# GNU Libtool is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# As a special exception to the GNU General Public License,
+# if you distribute this file as part of a program or library that
+# is built using GNU Libtool, you may include this file under the
+# same distribution terms that you use for the rest of that program.
+#
+# GNU Libtool is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Libtool; see the file COPYING.  If not, a copy
+# can be downloaded from http://www.gnu.org/licenses/gpl.html, or
+# obtained by writing to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+])
+
+# serial 56 LT_INIT
+
+
+# LT_PREREQ(VERSION)
+# ------------------
+# Complain and exit if this libtool version is less that VERSION.
+m4_defun([LT_PREREQ],
+[m4_if(m4_version_compare(m4_defn([LT_PACKAGE_VERSION]), [$1]), -1,
+       [m4_default([$3],
+		   [m4_fatal([Libtool version $1 or higher is required],
+		             63)])],
+       [$2])])
+
+
+# _LT_CHECK_BUILDDIR
+# ------------------
+# Complain if the absolute build directory name contains unusual characters
+m4_defun([_LT_CHECK_BUILDDIR],
+[case `pwd` in
+  *\ * | *\	*)
+    AC_MSG_WARN([Libtool does not cope well with whitespace in `pwd`]) ;;
+esac
+])
+
+
+# LT_INIT([OPTIONS])
+# ------------------
+AC_DEFUN([LT_INIT],
+[AC_PREREQ([2.58])dnl We use AC_INCLUDES_DEFAULT
+AC_BEFORE([$0], [LT_LANG])dnl
+AC_BEFORE([$0], [LT_OUTPUT])dnl
+AC_BEFORE([$0], [LTDL_INIT])dnl
+m4_require([_LT_CHECK_BUILDDIR])dnl
+
+dnl Autoconf doesn't catch unexpanded LT_ macros by default:
+m4_pattern_forbid([^_?LT_[A-Z_]+$])dnl
+m4_pattern_allow([^(_LT_EOF|LT_DLGLOBAL|LT_DLLAZY_OR_NOW|LT_MULTI_MODULE)$])dnl
+dnl aclocal doesn't pull ltoptions.m4, ltsugar.m4, or ltversion.m4
+dnl unless we require an AC_DEFUNed macro:
+AC_REQUIRE([LTOPTIONS_VERSION])dnl
+AC_REQUIRE([LTSUGAR_VERSION])dnl
+AC_REQUIRE([LTVERSION_VERSION])dnl
+AC_REQUIRE([LTOBSOLETE_VERSION])dnl
+m4_require([_LT_PROG_LTMAIN])dnl
+
+dnl Parse OPTIONS
+_LT_SET_OPTIONS([$0], [$1])
+
+# This can be used to rebuild libtool when needed
+LIBTOOL_DEPS="$ltmain"
+
+# Always use our own libtool.
+LIBTOOL='$(SHELL) $(top_builddir)/libtool'
+AC_SUBST(LIBTOOL)dnl
+
+_LT_SETUP
+
+# Only expand once:
+m4_define([LT_INIT])
+])# LT_INIT
+
+# Old names:
+AU_ALIAS([AC_PROG_LIBTOOL], [LT_INIT])
+AU_ALIAS([AM_PROG_LIBTOOL], [LT_INIT])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_PROG_LIBTOOL], [])
+dnl AC_DEFUN([AM_PROG_LIBTOOL], [])
+
+
+# _LT_CC_BASENAME(CC)
+# -------------------
+# Calculate cc_basename.  Skip known compiler wrappers and cross-prefix.
+m4_defun([_LT_CC_BASENAME],
+[for cc_temp in $1""; do
+  case $cc_temp in
+    compile | *[[\\/]]compile | ccache | *[[\\/]]ccache ) ;;
+    distcc | *[[\\/]]distcc | purify | *[[\\/]]purify ) ;;
+    \-*) ;;
+    *) break;;
+  esac
+done
+cc_basename=`$ECHO "X$cc_temp" | $Xsed -e 's%.*/%%' -e "s%^$host_alias-%%"`
+])
+
+
+# _LT_FILEUTILS_DEFAULTS
+# ----------------------
+# It is okay to use these file commands and assume they have been set
+# sensibly after `m4_require([_LT_FILEUTILS_DEFAULTS])'.
+m4_defun([_LT_FILEUTILS_DEFAULTS],
+[: ${CP="cp -f"}
+: ${MV="mv -f"}
+: ${RM="rm -f"}
+])# _LT_FILEUTILS_DEFAULTS
+
+
+# _LT_SETUP
+# ---------
+m4_defun([_LT_SETUP],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+_LT_DECL([], [host_alias], [0], [The host system])dnl
+_LT_DECL([], [host], [0])dnl
+_LT_DECL([], [host_os], [0])dnl
+dnl
+_LT_DECL([], [build_alias], [0], [The build system])dnl
+_LT_DECL([], [build], [0])dnl
+_LT_DECL([], [build_os], [0])dnl
+dnl
+AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([LT_PATH_LD])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+dnl
+AC_REQUIRE([AC_PROG_LN_S])dnl
+test -z "$LN_S" && LN_S="ln -s"
+_LT_DECL([], [LN_S], [1], [Whether we need soft or hard links])dnl
+dnl
+AC_REQUIRE([LT_CMD_MAX_LEN])dnl
+_LT_DECL([objext], [ac_objext], [0], [Object file suffix (normally "o")])dnl
+_LT_DECL([], [exeext], [0], [Executable file suffix (normally "")])dnl
+dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_CHECK_SHELL_FEATURES])dnl
+m4_require([_LT_CMD_RELOAD])dnl
+m4_require([_LT_CHECK_MAGIC_METHOD])dnl
+m4_require([_LT_CMD_OLD_ARCHIVE])dnl
+m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
+
+_LT_CONFIG_LIBTOOL_INIT([
+# See if we are running on zsh, and set the options which allow our
+# commands through without removal of \ escapes INIT.
+if test -n "\${ZSH_VERSION+set}" ; then
+   setopt NO_GLOB_SUBST
+fi
+])
+if test -n "${ZSH_VERSION+set}" ; then
+   setopt NO_GLOB_SUBST
+fi
+
+_LT_CHECK_OBJDIR
+
+m4_require([_LT_TAG_COMPILER])dnl
+_LT_PROG_ECHO_BACKSLASH
+
+case $host_os in
+aix3*)
+  # AIX sometimes has problems with the GCC collect2 program.  For some
+  # reason, if we set the COLLECT_NAMES environment variable, the problems
+  # vanish in a puff of smoke.
+  if test "X${COLLECT_NAMES+set}" != Xset; then
+    COLLECT_NAMES=
+    export COLLECT_NAMES
+  fi
+  ;;
+esac
+
+# Sed substitution that helps us do robust quoting.  It backslashifies
+# metacharacters that are still active within double-quoted strings.
+sed_quote_subst='s/\([["`$\\]]\)/\\\1/g'
+
+# Same as above, but do not quote variable references.
+double_quote_subst='s/\([["`\\]]\)/\\\1/g'
+
+# Sed substitution to delay expansion of an escaped shell variable in a
+# double_quote_subst'ed string.
+delay_variable_subst='s/\\\\\\\\\\\$/\\\\\\$/g'
+
+# Sed substitution to delay expansion of an escaped single quote.
+delay_single_quote_subst='s/'\''/'\'\\\\\\\'\''/g'
+
+# Sed substitution to avoid accidental globbing in evaled expressions
+no_glob_subst='s/\*/\\\*/g'
+
+# Global variables:
+ofile=libtool
+can_build_shared=yes
+
+# All known linkers require a `.a' archive for static linking (except MSVC,
+# which needs '.lib').
+libext=a
+
+with_gnu_ld="$lt_cv_prog_gnu_ld"
+
+old_CC="$CC"
+old_CFLAGS="$CFLAGS"
+
+# Set sane defaults for various variables
+test -z "$CC" && CC=cc
+test -z "$LTCC" && LTCC=$CC
+test -z "$LTCFLAGS" && LTCFLAGS=$CFLAGS
+test -z "$LD" && LD=ld
+test -z "$ac_objext" && ac_objext=o
+
+_LT_CC_BASENAME([$compiler])
+
+# Only perform the check for file, if the check method requires it
+test -z "$MAGIC_CMD" && MAGIC_CMD=file
+case $deplibs_check_method in
+file_magic*)
+  if test "$file_magic_cmd" = '$MAGIC_CMD'; then
+    _LT_PATH_MAGIC
+  fi
+  ;;
+esac
+
+# Use C for the default configuration in the libtool script
+LT_SUPPORTED_TAG([CC])
+_LT_LANG_C_CONFIG
+_LT_LANG_DEFAULT_CONFIG
+_LT_CONFIG_COMMANDS
+])# _LT_SETUP
+
+
+# _LT_PROG_LTMAIN
+# ---------------
+# Note that this code is called both from `configure', and `config.status'
+# now that we use AC_CONFIG_COMMANDS to generate libtool.  Notably,
+# `config.status' has no value for ac_aux_dir unless we are using Automake,
+# so we pass a copy along to make sure it has a sensible value anyway.
+m4_defun([_LT_PROG_LTMAIN],
+[m4_ifdef([AC_REQUIRE_AUX_FILE], [AC_REQUIRE_AUX_FILE([ltmain.sh])])dnl
+_LT_CONFIG_LIBTOOL_INIT([ac_aux_dir='$ac_aux_dir'])
+ltmain="$ac_aux_dir/ltmain.sh"
+])# _LT_PROG_LTMAIN
+
+
+## ------------------------------------- ##
+## Accumulate code for creating libtool. ##
+## ------------------------------------- ##
+
+# So that we can recreate a full libtool script including additional
+# tags, we accumulate the chunks of code to send to AC_CONFIG_COMMANDS
+# in macros and then make a single call at the end using the `libtool'
+# label.
+
+
+# _LT_CONFIG_LIBTOOL_INIT([INIT-COMMANDS])
+# ----------------------------------------
+# Register INIT-COMMANDS to be passed to AC_CONFIG_COMMANDS later.
+m4_define([_LT_CONFIG_LIBTOOL_INIT],
+[m4_ifval([$1],
+          [m4_append([_LT_OUTPUT_LIBTOOL_INIT],
+                     [$1
+])])])
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_INIT])
+
+
+# _LT_CONFIG_LIBTOOL([COMMANDS])
+# ------------------------------
+# Register COMMANDS to be passed to AC_CONFIG_COMMANDS later.
+m4_define([_LT_CONFIG_LIBTOOL],
+[m4_ifval([$1],
+          [m4_append([_LT_OUTPUT_LIBTOOL_COMMANDS],
+                     [$1
+])])])
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS])
+
+
+# _LT_CONFIG_SAVE_COMMANDS([COMMANDS], [INIT_COMMANDS])
+# -----------------------------------------------------
+m4_defun([_LT_CONFIG_SAVE_COMMANDS],
+[_LT_CONFIG_LIBTOOL([$1])
+_LT_CONFIG_LIBTOOL_INIT([$2])
+])
+
+
+# _LT_FORMAT_COMMENT([COMMENT])
+# -----------------------------
+# Add leading comment marks to the start of each line, and a trailing
+# full-stop to the whole comment if one is not present already.
+m4_define([_LT_FORMAT_COMMENT],
+[m4_ifval([$1], [
+m4_bpatsubst([m4_bpatsubst([$1], [^ *], [# ])],
+              [['`$\]], [\\\&])]m4_bmatch([$1], [[!?.]$], [], [.])
+)])
+
+
+
+## ------------------------ ##
+## FIXME: Eliminate VARNAME ##
+## ------------------------ ##
+
+
+# _LT_DECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION], [IS-TAGGED?])
+# -------------------------------------------------------------------
+# CONFIGNAME is the name given to the value in the libtool script.
+# VARNAME is the (base) name used in the configure script.
+# VALUE may be 0, 1 or 2 for a computed quote escaped value based on
+# VARNAME.  Any other value will be used directly.
+m4_define([_LT_DECL],
+[lt_if_append_uniq([lt_decl_varnames], [$2], [, ],
+    [lt_dict_add_subkey([lt_decl_dict], [$2], [libtool_name],
+	[m4_ifval([$1], [$1], [$2])])
+    lt_dict_add_subkey([lt_decl_dict], [$2], [value], [$3])
+    m4_ifval([$4],
+	[lt_dict_add_subkey([lt_decl_dict], [$2], [description], [$4])])
+    lt_dict_add_subkey([lt_decl_dict], [$2],
+	[tagged?], [m4_ifval([$5], [yes], [no])])])
+])
+
+
+# _LT_TAGDECL([CONFIGNAME], VARNAME, VALUE, [DESCRIPTION])
+# --------------------------------------------------------
+m4_define([_LT_TAGDECL], [_LT_DECL([$1], [$2], [$3], [$4], [yes])])
+
+
+# lt_decl_tag_varnames([SEPARATOR], [VARNAME1...])
+# ------------------------------------------------
+m4_define([lt_decl_tag_varnames],
+[_lt_decl_filter([tagged?], [yes], $@)])
+
+
+# _lt_decl_filter(SUBKEY, VALUE, [SEPARATOR], [VARNAME1..])
+# ---------------------------------------------------------
+m4_define([_lt_decl_filter],
+[m4_case([$#],
+  [0], [m4_fatal([$0: too few arguments: $#])],
+  [1], [m4_fatal([$0: too few arguments: $#: $1])],
+  [2], [lt_dict_filter([lt_decl_dict], [$1], [$2], [], lt_decl_varnames)],
+  [3], [lt_dict_filter([lt_decl_dict], [$1], [$2], [$3], lt_decl_varnames)],
+  [lt_dict_filter([lt_decl_dict], $@)])[]dnl
+])
+
+
+# lt_decl_quote_varnames([SEPARATOR], [VARNAME1...])
+# --------------------------------------------------
+m4_define([lt_decl_quote_varnames],
+[_lt_decl_filter([value], [1], $@)])
+
+
+# lt_decl_dquote_varnames([SEPARATOR], [VARNAME1...])
+# ---------------------------------------------------
+m4_define([lt_decl_dquote_varnames],
+[_lt_decl_filter([value], [2], $@)])
+
+
+# lt_decl_varnames_tagged([SEPARATOR], [VARNAME1...])
+# ---------------------------------------------------
+m4_define([lt_decl_varnames_tagged],
+[m4_assert([$# <= 2])dnl
+_$0(m4_quote(m4_default([$1], [[, ]])),
+    m4_ifval([$2], [[$2]], [m4_dquote(lt_decl_tag_varnames)]),
+    m4_split(m4_normalize(m4_quote(_LT_TAGS)), [ ]))])
+m4_define([_lt_decl_varnames_tagged],
+[m4_ifval([$3], [lt_combine([$1], [$2], [_], $3)])])
+
+
+# lt_decl_all_varnames([SEPARATOR], [VARNAME1...])
+# ------------------------------------------------
+m4_define([lt_decl_all_varnames],
+[_$0(m4_quote(m4_default([$1], [[, ]])),
+     m4_if([$2], [],
+	   m4_quote(lt_decl_varnames),
+	m4_quote(m4_shift($@))))[]dnl
+])
+m4_define([_lt_decl_all_varnames],
+[lt_join($@, lt_decl_varnames_tagged([$1],
+			lt_decl_tag_varnames([[, ]], m4_shift($@))))dnl
+])
+
+
+# _LT_CONFIG_STATUS_DECLARE([VARNAME])
+# ------------------------------------
+# Quote a variable value, and forward it to `config.status' so that its
+# declaration there will have the same value as in `configure'.  VARNAME
+# must have a single quote delimited value for this to work.
+m4_define([_LT_CONFIG_STATUS_DECLARE],
+[$1='`$ECHO "X$][$1" | $Xsed -e "$delay_single_quote_subst"`'])
+
+
+# _LT_CONFIG_STATUS_DECLARATIONS
+# ------------------------------
+# We delimit libtool config variables with single quotes, so when
+# we write them to config.status, we have to be sure to quote all
+# embedded single quotes properly.  In configure, this macro expands
+# each variable declared with _LT_DECL (and _LT_TAGDECL) into:
+#
+#    <var>='`$ECHO "X$<var>" | $Xsed -e "$delay_single_quote_subst"`'
+m4_defun([_LT_CONFIG_STATUS_DECLARATIONS],
+[m4_foreach([_lt_var], m4_quote(lt_decl_all_varnames),
+    [m4_n([_LT_CONFIG_STATUS_DECLARE(_lt_var)])])])
+
+
+# _LT_LIBTOOL_TAGS
+# ----------------
+# Output comment and list of tags supported by the script
+m4_defun([_LT_LIBTOOL_TAGS],
+[_LT_FORMAT_COMMENT([The names of the tagged configurations supported by this script])dnl
+available_tags="_LT_TAGS"dnl
+])
+
+
+# _LT_LIBTOOL_DECLARE(VARNAME, [TAG])
+# -----------------------------------
+# Extract the dictionary values for VARNAME (optionally with TAG) and
+# expand to a commented shell variable setting:
+#
+#    # Some comment about what VAR is for.
+#    visible_name=$lt_internal_name
+m4_define([_LT_LIBTOOL_DECLARE],
+[_LT_FORMAT_COMMENT(m4_quote(lt_dict_fetch([lt_decl_dict], [$1],
+					   [description])))[]dnl
+m4_pushdef([_libtool_name],
+    m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [libtool_name])))[]dnl
+m4_case(m4_quote(lt_dict_fetch([lt_decl_dict], [$1], [value])),
+    [0], [_libtool_name=[$]$1],
+    [1], [_libtool_name=$lt_[]$1],
+    [2], [_libtool_name=$lt_[]$1],
+    [_libtool_name=lt_dict_fetch([lt_decl_dict], [$1], [value])])[]dnl
+m4_ifval([$2], [_$2])[]m4_popdef([_libtool_name])[]dnl
+])
+
+
+# _LT_LIBTOOL_CONFIG_VARS
+# -----------------------
+# Produce commented declarations of non-tagged libtool config variables
+# suitable for insertion in the LIBTOOL CONFIG section of the `libtool'
+# script.  Tagged libtool config variables (even for the LIBTOOL CONFIG
+# section) are produced by _LT_LIBTOOL_TAG_VARS.
+m4_defun([_LT_LIBTOOL_CONFIG_VARS],
+[m4_foreach([_lt_var],
+    m4_quote(_lt_decl_filter([tagged?], [no], [], lt_decl_varnames)),
+    [m4_n([_LT_LIBTOOL_DECLARE(_lt_var)])])])
+
+
+# _LT_LIBTOOL_TAG_VARS(TAG)
+# -------------------------
+m4_define([_LT_LIBTOOL_TAG_VARS],
+[m4_foreach([_lt_var], m4_quote(lt_decl_tag_varnames),
+    [m4_n([_LT_LIBTOOL_DECLARE(_lt_var, [$1])])])])
+
+
+# _LT_TAGVAR(VARNAME, [TAGNAME])
+# ------------------------------
+m4_define([_LT_TAGVAR], [m4_ifval([$2], [$1_$2], [$1])])
+
+
+# _LT_CONFIG_COMMANDS
+# -------------------
+# Send accumulated output to $CONFIG_STATUS.  Thanks to the lists of
+# variables for single and double quote escaping we saved from calls
+# to _LT_DECL, we can put quote escaped variables declarations
+# into `config.status', and then the shell code to quote escape them in
+# for loops in `config.status'.  Finally, any additional code accumulated
+# from calls to _LT_CONFIG_LIBTOOL_INIT is expanded.
+m4_defun([_LT_CONFIG_COMMANDS],
+[AC_PROVIDE_IFELSE([LT_OUTPUT],
+	dnl If the libtool generation code has been placed in $CONFIG_LT,
+	dnl instead of duplicating it all over again into config.status,
+	dnl then we will have config.status run $CONFIG_LT later, so it
+	dnl needs to know what name is stored there:
+        [AC_CONFIG_COMMANDS([libtool],
+            [$SHELL $CONFIG_LT || AS_EXIT(1)], [CONFIG_LT='$CONFIG_LT'])],
+    dnl If the libtool generation code is destined for config.status,
+    dnl expand the accumulated commands and init code now:
+    [AC_CONFIG_COMMANDS([libtool],
+        [_LT_OUTPUT_LIBTOOL_COMMANDS], [_LT_OUTPUT_LIBTOOL_COMMANDS_INIT])])
+])#_LT_CONFIG_COMMANDS
+
+
+# Initialize.
+m4_define([_LT_OUTPUT_LIBTOOL_COMMANDS_INIT],
+[
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+sed_quote_subst='$sed_quote_subst'
+double_quote_subst='$double_quote_subst'
+delay_variable_subst='$delay_variable_subst'
+_LT_CONFIG_STATUS_DECLARATIONS
+LTCC='$LTCC'
+LTCFLAGS='$LTCFLAGS'
+compiler='$compiler_DEFAULT'
+
+# Quote evaled strings.
+for var in lt_decl_all_varnames([[ \
+]], lt_decl_quote_varnames); do
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$sed_quote_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Double-quote double-evaled strings.
+for var in lt_decl_all_varnames([[ \
+]], lt_decl_dquote_varnames); do
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
+done
+
+# Fix-up fallback echo if it was mangled by the above quoting rules.
+case \$lt_ECHO in
+*'\\\[$]0 --fallback-echo"')dnl "
+  lt_ECHO=\`\$ECHO "X\$lt_ECHO" | \$Xsed -e 's/\\\\\\\\\\\\\\\[$]0 --fallback-echo"\[$]/\[$]0 --fallback-echo"/'\`
+  ;;
+esac
+
+_LT_OUTPUT_LIBTOOL_INIT
+])
+
+
+# LT_OUTPUT
+# ---------
+# This macro allows early generation of the libtool script (before
+# AC_OUTPUT is called), incase it is used in configure for compilation
+# tests.
+AC_DEFUN([LT_OUTPUT],
+[: ${CONFIG_LT=./config.lt}
+AC_MSG_NOTICE([creating $CONFIG_LT])
+cat >"$CONFIG_LT" <<_LTEOF
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate a libtool stub with the current configuration.
+
+lt_cl_silent=false
+SHELL=\${CONFIG_SHELL-$SHELL}
+_LTEOF
+
+cat >>"$CONFIG_LT" <<\_LTEOF
+AS_SHELL_SANITIZE
+_AS_PREPARE
+
+exec AS_MESSAGE_FD>&1
+exec AS_MESSAGE_LOG_FD>>config.log
+{
+  echo
+  AS_BOX([Running $as_me.])
+} >&AS_MESSAGE_LOG_FD
+
+lt_cl_help="\
+\`$as_me' creates a local libtool stub from the current configuration,
+for use in further configure time tests before the real libtool is
+generated.
+
+Usage: $[0] [[OPTIONS]]
+
+  -h, --help      print this help, then exit
+  -V, --version   print version number, then exit
+  -q, --quiet     do not print progress messages
+  -d, --debug     don't remove temporary files
+
+Report bugs to <bug-libtool@gnu.org>."
+
+lt_cl_version="\
+m4_ifset([AC_PACKAGE_NAME], [AC_PACKAGE_NAME ])config.lt[]dnl
+m4_ifset([AC_PACKAGE_VERSION], [ AC_PACKAGE_VERSION])
+configured by $[0], generated by m4_PACKAGE_STRING.
+
+Copyright (C) 2008 Free Software Foundation, Inc.
+This config.lt script is free software; the Free Software Foundation
+gives unlimited permision to copy, distribute and modify it."
+
+while test $[#] != 0
+do
+  case $[1] in
+    --version | --v* | -V )
+      echo "$lt_cl_version"; exit 0 ;;
+    --help | --h* | -h )
+      echo "$lt_cl_help"; exit 0 ;;
+    --debug | --d* | -d )
+      debug=: ;;
+    --quiet | --q* | --silent | --s* | -q )
+      lt_cl_silent=: ;;
+
+    -*) AC_MSG_ERROR([unrecognized option: $[1]
+Try \`$[0] --help' for more information.]) ;;
+
+    *) AC_MSG_ERROR([unrecognized argument: $[1]
+Try \`$[0] --help' for more information.]) ;;
+  esac
+  shift
+done
+
+if $lt_cl_silent; then
+  exec AS_MESSAGE_FD>/dev/null
+fi
+_LTEOF
+
+cat >>"$CONFIG_LT" <<_LTEOF
+_LT_OUTPUT_LIBTOOL_COMMANDS_INIT
+_LTEOF
+
+cat >>"$CONFIG_LT" <<\_LTEOF
+AC_MSG_NOTICE([creating $ofile])
+_LT_OUTPUT_LIBTOOL_COMMANDS
+AS_EXIT(0)
+_LTEOF
+chmod +x "$CONFIG_LT"
+
+# configure is writing to config.log, but config.lt does its own redirection,
+# appending to config.log, which fails on DOS, as config.log is still kept
+# open by configure.  Here we exec the FD to /dev/null, effectively closing
+# config.log, so it can be properly (re)opened and appended to by config.lt.
+if test "$no_create" != yes; then
+  lt_cl_success=:
+  test "$silent" = yes &&
+    lt_config_lt_args="$lt_config_lt_args --quiet"
+  exec AS_MESSAGE_LOG_FD>/dev/null
+  $SHELL "$CONFIG_LT" $lt_config_lt_args || lt_cl_success=false
+  exec AS_MESSAGE_LOG_FD>>config.log
+  $lt_cl_success || AS_EXIT(1)
+fi
+])# LT_OUTPUT
+
+
+# _LT_CONFIG(TAG)
+# ---------------
+# If TAG is the built-in tag, create an initial libtool script with a
+# default configuration from the untagged config vars.  Otherwise add code
+# to config.status for appending the configuration named by TAG from the
+# matching tagged config vars.
+m4_defun([_LT_CONFIG],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+_LT_CONFIG_SAVE_COMMANDS([
+  m4_define([_LT_TAG], m4_if([$1], [], [C], [$1]))dnl
+  m4_if(_LT_TAG, [C], [
+    # See if we are running on zsh, and set the options which allow our
+    # commands through without removal of \ escapes.
+    if test -n "${ZSH_VERSION+set}" ; then
+      setopt NO_GLOB_SUBST
+    fi
+
+    cfgfile="${ofile}T"
+    trap "$RM \"$cfgfile\"; exit 1" 1 2 15
+    $RM "$cfgfile"
+
+    cat <<_LT_EOF >> "$cfgfile"
+#! $SHELL
+
+# `$ECHO "$ofile" | sed 's%^.*/%%'` - Provide generalized library-building support services.
+# Generated automatically by $as_me ($PACKAGE$TIMESTAMP) $VERSION
+# Libtool was configured on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+# NOTE: Changes made to this file will be lost: look at ltmain.sh.
+#
+_LT_COPYING
+_LT_LIBTOOL_TAGS
+
+# ### BEGIN LIBTOOL CONFIG
+_LT_LIBTOOL_CONFIG_VARS
+_LT_LIBTOOL_TAG_VARS
+# ### END LIBTOOL CONFIG
+
+_LT_EOF
+
+  case $host_os in
+  aix3*)
+    cat <<\_LT_EOF >> "$cfgfile"
+# AIX sometimes has problems with the GCC collect2 program.  For some
+# reason, if we set the COLLECT_NAMES environment variable, the problems
+# vanish in a puff of smoke.
+if test "X${COLLECT_NAMES+set}" != Xset; then
+  COLLECT_NAMES=
+  export COLLECT_NAMES
+fi
+_LT_EOF
+    ;;
+  esac
+
+  _LT_PROG_LTMAIN
+
+  # We use sed instead of cat because bash on DJGPP gets confused if
+  # if finds mixed CR/LF and LF-only lines.  Since sed operates in
+  # text mode, it properly converts lines to CR/LF.  This bash problem
+  # is reportedly fixed, but why not run on old versions too?
+  sed '/^# Generated shell functions inserted here/q' "$ltmain" >> "$cfgfile" \
+    || (rm -f "$cfgfile"; exit 1)
+
+  _LT_PROG_XSI_SHELLFNS
+
+  sed -n '/^# Generated shell functions inserted here/,$p' "$ltmain" >> "$cfgfile" \
+    || (rm -f "$cfgfile"; exit 1)
+
+  mv -f "$cfgfile" "$ofile" ||
+    (rm -f "$ofile" && cp "$cfgfile" "$ofile" && rm -f "$cfgfile")
+  chmod +x "$ofile"
+],
+[cat <<_LT_EOF >> "$ofile"
+
+dnl Unfortunately we have to use $1 here, since _LT_TAG is not expanded
+dnl in a comment (ie after a #).
+# ### BEGIN LIBTOOL TAG CONFIG: $1
+_LT_LIBTOOL_TAG_VARS(_LT_TAG)
+# ### END LIBTOOL TAG CONFIG: $1
+_LT_EOF
+])dnl /m4_if
+],
+[m4_if([$1], [], [
+    PACKAGE='$PACKAGE'
+    VERSION='$VERSION'
+    TIMESTAMP='$TIMESTAMP'
+    RM='$RM'
+    ofile='$ofile'], [])
+])dnl /_LT_CONFIG_SAVE_COMMANDS
+])# _LT_CONFIG
+
+
+# LT_SUPPORTED_TAG(TAG)
+# ---------------------
+# Trace this macro to discover what tags are supported by the libtool
+# --tag option, using:
+#    autoconf --trace 'LT_SUPPORTED_TAG:$1'
+AC_DEFUN([LT_SUPPORTED_TAG], [])
+
+
+# C support is built-in for now
+m4_define([_LT_LANG_C_enabled], [])
+m4_define([_LT_TAGS], [])
+
+
+# LT_LANG(LANG)
+# -------------
+# Enable libtool support for the given language if not already enabled.
+AC_DEFUN([LT_LANG],
+[AC_BEFORE([$0], [LT_OUTPUT])dnl
+m4_case([$1],
+  [C],			[_LT_LANG(C)],
+  [C++],		[_LT_LANG(CXX)],
+  [Java],		[_LT_LANG(GCJ)],
+  [Fortran 77],		[_LT_LANG(F77)],
+  [Fortran],		[_LT_LANG(FC)],
+  [Windows Resource],	[_LT_LANG(RC)],
+  [m4_ifdef([_LT_LANG_]$1[_CONFIG],
+    [_LT_LANG($1)],
+    [m4_fatal([$0: unsupported language: "$1"])])])dnl
+])# LT_LANG
+
+
+# _LT_LANG(LANGNAME)
+# ------------------
+m4_defun([_LT_LANG],
+[m4_ifdef([_LT_LANG_]$1[_enabled], [],
+  [LT_SUPPORTED_TAG([$1])dnl
+  m4_append([_LT_TAGS], [$1 ])dnl
+  m4_define([_LT_LANG_]$1[_enabled], [])dnl
+  _LT_LANG_$1_CONFIG($1)])dnl
+])# _LT_LANG
+
+
+# _LT_LANG_DEFAULT_CONFIG
+# -----------------------
+m4_defun([_LT_LANG_DEFAULT_CONFIG],
+[AC_PROVIDE_IFELSE([AC_PROG_CXX],
+  [LT_LANG(CXX)],
+  [m4_define([AC_PROG_CXX], defn([AC_PROG_CXX])[LT_LANG(CXX)])])
+
+AC_PROVIDE_IFELSE([AC_PROG_F77],
+  [LT_LANG(F77)],
+  [m4_define([AC_PROG_F77], defn([AC_PROG_F77])[LT_LANG(F77)])])
+
+AC_PROVIDE_IFELSE([AC_PROG_FC],
+  [LT_LANG(FC)],
+  [m4_define([AC_PROG_FC], defn([AC_PROG_FC])[LT_LANG(FC)])])
+
+dnl The call to [A][M_PROG_GCJ] is quoted like that to stop aclocal
+dnl pulling things in needlessly.
+AC_PROVIDE_IFELSE([AC_PROG_GCJ],
+  [LT_LANG(GCJ)],
+  [AC_PROVIDE_IFELSE([A][M_PROG_GCJ],
+    [LT_LANG(GCJ)],
+    [AC_PROVIDE_IFELSE([LT_PROG_GCJ],
+      [LT_LANG(GCJ)],
+      [m4_ifdef([AC_PROG_GCJ],
+	[m4_define([AC_PROG_GCJ], defn([AC_PROG_GCJ])[LT_LANG(GCJ)])])
+       m4_ifdef([A][M_PROG_GCJ],
+	[m4_define([A][M_PROG_GCJ], defn([A][M_PROG_GCJ])[LT_LANG(GCJ)])])
+       m4_ifdef([LT_PROG_GCJ],
+	[m4_define([LT_PROG_GCJ], defn([LT_PROG_GCJ])[LT_LANG(GCJ)])])])])])
+
+AC_PROVIDE_IFELSE([LT_PROG_RC],
+  [LT_LANG(RC)],
+  [m4_define([LT_PROG_RC], defn([LT_PROG_RC])[LT_LANG(RC)])])
+])# _LT_LANG_DEFAULT_CONFIG
+
+# Obsolete macros:
+AU_DEFUN([AC_LIBTOOL_CXX], [LT_LANG(C++)])
+AU_DEFUN([AC_LIBTOOL_F77], [LT_LANG(Fortran 77)])
+AU_DEFUN([AC_LIBTOOL_FC], [LT_LANG(Fortran)])
+AU_DEFUN([AC_LIBTOOL_GCJ], [LT_LANG(Java)])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_CXX], [])
+dnl AC_DEFUN([AC_LIBTOOL_F77], [])
+dnl AC_DEFUN([AC_LIBTOOL_FC], [])
+dnl AC_DEFUN([AC_LIBTOOL_GCJ], [])
+
+
+# _LT_TAG_COMPILER
+# ----------------
+m4_defun([_LT_TAG_COMPILER],
+[AC_REQUIRE([AC_PROG_CC])dnl
+
+_LT_DECL([LTCC], [CC], [1], [A C compiler])dnl
+_LT_DECL([LTCFLAGS], [CFLAGS], [1], [LTCC compiler flags])dnl
+_LT_TAGDECL([CC], [compiler], [1], [A language specific compiler])dnl
+_LT_TAGDECL([with_gcc], [GCC], [0], [Is the compiler the GNU compiler?])dnl
+
+# If no C compiler was specified, use CC.
+LTCC=${LTCC-"$CC"}
+
+# If no C compiler flags were specified, use CFLAGS.
+LTCFLAGS=${LTCFLAGS-"$CFLAGS"}
+
+# Allow CC to be a program name with arguments.
+compiler=$CC
+])# _LT_TAG_COMPILER
+
+
+# _LT_COMPILER_BOILERPLATE
+# ------------------------
+# Check for compiler boilerplate output or warnings with
+# the simple compiler test code.
+m4_defun([_LT_COMPILER_BOILERPLATE],
+[m4_require([_LT_DECL_SED])dnl
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_compile_test_code" >conftest.$ac_ext
+eval "$ac_compile" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_compiler_boilerplate=`cat conftest.err`
+$RM conftest*
+])# _LT_COMPILER_BOILERPLATE
+
+
+# _LT_LINKER_BOILERPLATE
+# ----------------------
+# Check for linker boilerplate output or warnings with
+# the simple link test code.
+m4_defun([_LT_LINKER_BOILERPLATE],
+[m4_require([_LT_DECL_SED])dnl
+ac_outfile=conftest.$ac_objext
+echo "$lt_simple_link_test_code" >conftest.$ac_ext
+eval "$ac_link" 2>&1 >/dev/null | $SED '/^$/d; /^ *+/d' >conftest.err
+_lt_linker_boilerplate=`cat conftest.err`
+$RM -r conftest*
+])# _LT_LINKER_BOILERPLATE
+
+# _LT_REQUIRED_DARWIN_CHECKS
+# -------------------------
+m4_defun_once([_LT_REQUIRED_DARWIN_CHECKS],[
+  case $host_os in
+    rhapsody* | darwin*)
+    AC_CHECK_TOOL([DSYMUTIL], [dsymutil], [:])
+    AC_CHECK_TOOL([NMEDIT], [nmedit], [:])
+    AC_CHECK_TOOL([LIPO], [lipo], [:])
+    AC_CHECK_TOOL([OTOOL], [otool], [:])
+    AC_CHECK_TOOL([OTOOL64], [otool64], [:])
+    _LT_DECL([], [DSYMUTIL], [1],
+      [Tool to manipulate archived DWARF debug symbol files on Mac OS X])
+    _LT_DECL([], [NMEDIT], [1],
+      [Tool to change global to local symbols on Mac OS X])
+    _LT_DECL([], [LIPO], [1],
+      [Tool to manipulate fat objects and archives on Mac OS X])
+    _LT_DECL([], [OTOOL], [1],
+      [ldd/readelf like tool for Mach-O binaries on Mac OS X])
+    _LT_DECL([], [OTOOL64], [1],
+      [ldd/readelf like tool for 64 bit Mach-O binaries on Mac OS X 10.4])
+
+    AC_CACHE_CHECK([for -single_module linker flag],[lt_cv_apple_cc_single_mod],
+      [lt_cv_apple_cc_single_mod=no
+      if test -z "${LT_MULTI_MODULE}"; then
+	# By default we will add the -single_module flag. You can override
+	# by either setting the environment variable LT_MULTI_MODULE
+	# non-empty at configure time, or by adding -multi_module to the
+	# link flags.
+	rm -rf libconftest.dylib*
+	echo "int foo(void){return 1;}" > conftest.c
+	echo "$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+-dynamiclib -Wl,-single_module conftest.c" >&AS_MESSAGE_LOG_FD
+	$LTCC $LTCFLAGS $LDFLAGS -o libconftest.dylib \
+	  -dynamiclib -Wl,-single_module conftest.c 2>conftest.err
+        _lt_result=$?
+	if test -f libconftest.dylib && test ! -s conftest.err && test $_lt_result = 0; then
+	  lt_cv_apple_cc_single_mod=yes
+	else
+	  cat conftest.err >&AS_MESSAGE_LOG_FD
+	fi
+	rm -rf libconftest.dylib*
+	rm -f conftest.*
+      fi])
+    AC_CACHE_CHECK([for -exported_symbols_list linker flag],
+      [lt_cv_ld_exported_symbols_list],
+      [lt_cv_ld_exported_symbols_list=no
+      save_LDFLAGS=$LDFLAGS
+      echo "_main" > conftest.sym
+      LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+	[lt_cv_ld_exported_symbols_list=yes],
+	[lt_cv_ld_exported_symbols_list=no])
+	LDFLAGS="$save_LDFLAGS"
+    ])
+    case $host_os in
+    rhapsody* | darwin1.[[012]])
+      _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;;
+    darwin1.*)
+      _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
+    darwin*) # darwin 5.x on
+      # if running on 10.5 or later, the deployment target defaults
+      # to the OS version, if on x86, and 10.4, the deployment
+      # target defaults to 10.4. Don't you love it?
+      case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
+	10.0,*86*-darwin8*|10.0,*-darwin[[91]]*)
+	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+	10.[[012]]*)
+	  _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;;
+	10.*)
+	  _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
+      esac
+    ;;
+  esac
+    if test "$lt_cv_apple_cc_single_mod" = "yes"; then
+      _lt_dar_single_mod='$single_module'
+    fi
+    if test "$lt_cv_ld_exported_symbols_list" = "yes"; then
+      _lt_dar_export_syms=' ${wl}-exported_symbols_list,$output_objdir/${libname}-symbols.expsym'
+    else
+      _lt_dar_export_syms='~$NMEDIT -s $output_objdir/${libname}-symbols.expsym ${lib}'
+    fi
+    if test "$DSYMUTIL" != ":"; then
+      _lt_dsymutil='~$DSYMUTIL $lib || :'
+    else
+      _lt_dsymutil=
+    fi
+    ;;
+  esac
+])
+
+
+# _LT_DARWIN_LINKER_FEATURES
+# --------------------------
+# Checks for linker and compiler features on darwin
+m4_defun([_LT_DARWIN_LINKER_FEATURES],
+[
+  m4_require([_LT_REQUIRED_DARWIN_CHECKS])
+  _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+  _LT_TAGVAR(hardcode_direct, $1)=no
+  _LT_TAGVAR(hardcode_automatic, $1)=yes
+  _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+  _LT_TAGVAR(whole_archive_flag_spec, $1)=''
+  _LT_TAGVAR(link_all_deplibs, $1)=yes
+  _LT_TAGVAR(allow_undefined_flag, $1)="$_lt_dar_allow_undefined"
+  case $cc_basename in
+     ifort*) _lt_dar_can_shared=yes ;;
+     *) _lt_dar_can_shared=$GCC ;;
+  esac
+  if test "$_lt_dar_can_shared" = "yes"; then
+    output_verbose_link_cmd=echo
+    _LT_TAGVAR(archive_cmds, $1)="\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring $_lt_dar_single_mod${_lt_dsymutil}"
+    _LT_TAGVAR(module_cmds, $1)="\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}"
+    _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring ${_lt_dar_single_mod}${_lt_dar_export_syms}${_lt_dsymutil}"
+    _LT_TAGVAR(module_expsym_cmds, $1)="sed -e 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC \$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs \$compiler_flags${_lt_dar_export_syms}${_lt_dsymutil}"
+    m4_if([$1], [CXX],
+[   if test "$lt_cv_apple_cc_single_mod" != "yes"; then
+      _LT_TAGVAR(archive_cmds, $1)="\$CC -r -keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring${_lt_dsymutil}"
+      _LT_TAGVAR(archive_expsym_cmds, $1)="sed 's,^,_,' < \$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -r -keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib \$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs \$compiler_flags -install_name \$rpath/\$soname \$verstring${_lt_dar_export_syms}${_lt_dsymutil}"
+    fi
+],[])
+  else
+  _LT_TAGVAR(ld_shlibs, $1)=no
+  fi
+])
+
+# _LT_SYS_MODULE_PATH_AIX
+# -----------------------
+# Links a minimal program and checks the executable
+# for the system default hardcoded library path. In most cases,
+# this is /usr/lib:/lib, but when the MPI compilers are used
+# the location of the communication and MPI libs are included too.
+# If we don't find anything, use the default library path according
+# to the aix ld manual.
+m4_defun([_LT_SYS_MODULE_PATH_AIX],
+[m4_require([_LT_DECL_SED])dnl
+AC_LINK_IFELSE(AC_LANG_PROGRAM,[
+lt_aix_libpath_sed='
+    /Import File Strings/,/^$/ {
+	/^0/ {
+	    s/^0  *\(.*\)$/\1/
+	    p
+	}
+    }'
+aix_libpath=`dump -H conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+# Check for a 64-bit object if we didn't find anything.
+if test -z "$aix_libpath"; then
+  aix_libpath=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
+fi],[])
+if test -z "$aix_libpath"; then aix_libpath="/usr/lib:/lib"; fi
+])# _LT_SYS_MODULE_PATH_AIX
+
+
+# _LT_SHELL_INIT(ARG)
+# -------------------
+m4_define([_LT_SHELL_INIT],
+[ifdef([AC_DIVERSION_NOTICE],
+	     [AC_DIVERT_PUSH(AC_DIVERSION_NOTICE)],
+	 [AC_DIVERT_PUSH(NOTICE)])
+$1
+AC_DIVERT_POP
+])# _LT_SHELL_INIT
+
+
+# _LT_PROG_ECHO_BACKSLASH
+# -----------------------
+# Add some code to the start of the generated configure script which
+# will find an echo command which doesn't interpret backslashes.
+m4_defun([_LT_PROG_ECHO_BACKSLASH],
+[_LT_SHELL_INIT([
+# Check that we are running under the correct shell.
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+case X$lt_ECHO in
+X*--fallback-echo)
+  # Remove one level of quotation (which was required for Make).
+  ECHO=`echo "$lt_ECHO" | sed 's,\\\\\[$]\\[$]0,'[$]0','`
+  ;;
+esac
+
+ECHO=${lt_ECHO-echo}
+if test "X[$]1" = X--no-reexec; then
+  # Discard the --no-reexec flag, and continue.
+  shift
+elif test "X[$]1" = X--fallback-echo; then
+  # Avoid inline document here, it may be left over
+  :
+elif test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' ; then
+  # Yippee, $ECHO works!
+  :
+else
+  # Restart under the correct shell.
+  exec $SHELL "[$]0" --no-reexec ${1+"[$]@"}
+fi
+
+if test "X[$]1" = X--fallback-echo; then
+  # used as fallback echo
+  shift
+  cat <<_LT_EOF
+[$]*
+_LT_EOF
+  exit 0
+fi
+
+# The HP-UX ksh and POSIX shell print the target directory to stdout
+# if CDPATH is set.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+if test -z "$lt_ECHO"; then
+  if test "X${echo_test_string+set}" != Xset; then
+    # find a string as large as possible, as long as the shell can cope with it
+    for cmd in 'sed 50q "[$]0"' 'sed 20q "[$]0"' 'sed 10q "[$]0"' 'sed 2q "[$]0"' 'echo test'; do
+      # expected sizes: less than 2Kb, 1Kb, 512 bytes, 16 bytes, ...
+      if { echo_test_string=`eval $cmd`; } 2>/dev/null &&
+	 { test "X$echo_test_string" = "X$echo_test_string"; } 2>/dev/null
+      then
+        break
+      fi
+    done
+  fi
+
+  if test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' &&
+     echo_testing_string=`{ $ECHO "$echo_test_string"; } 2>/dev/null` &&
+     test "X$echo_testing_string" = "X$echo_test_string"; then
+    :
+  else
+    # The Solaris, AIX, and Digital Unix default echo programs unquote
+    # backslashes.  This makes it impossible to quote backslashes using
+    #   echo "$something" | sed 's/\\/\\\\/g'
+    #
+    # So, first we look for a working echo in the user's PATH.
+
+    lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+    for dir in $PATH /usr/ucb; do
+      IFS="$lt_save_ifs"
+      if (test -f $dir/echo || test -f $dir/echo$ac_exeext) &&
+         test "X`($dir/echo '\t') 2>/dev/null`" = 'X\t' &&
+         echo_testing_string=`($dir/echo "$echo_test_string") 2>/dev/null` &&
+         test "X$echo_testing_string" = "X$echo_test_string"; then
+        ECHO="$dir/echo"
+        break
+      fi
+    done
+    IFS="$lt_save_ifs"
+
+    if test "X$ECHO" = Xecho; then
+      # We didn't find a better echo, so look for alternatives.
+      if test "X`{ print -r '\t'; } 2>/dev/null`" = 'X\t' &&
+         echo_testing_string=`{ print -r "$echo_test_string"; } 2>/dev/null` &&
+         test "X$echo_testing_string" = "X$echo_test_string"; then
+        # This shell has a builtin print -r that does the trick.
+        ECHO='print -r'
+      elif { test -f /bin/ksh || test -f /bin/ksh$ac_exeext; } &&
+	   test "X$CONFIG_SHELL" != X/bin/ksh; then
+        # If we have ksh, try running configure again with it.
+        ORIGINAL_CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
+        export ORIGINAL_CONFIG_SHELL
+        CONFIG_SHELL=/bin/ksh
+        export CONFIG_SHELL
+        exec $CONFIG_SHELL "[$]0" --no-reexec ${1+"[$]@"}
+      else
+        # Try using printf.
+        ECHO='printf %s\n'
+        if test "X`{ $ECHO '\t'; } 2>/dev/null`" = 'X\t' &&
+	   echo_testing_string=`{ $ECHO "$echo_test_string"; } 2>/dev/null` &&
+	   test "X$echo_testing_string" = "X$echo_test_string"; then
+	  # Cool, printf works
+	  :
+        elif echo_testing_string=`($ORIGINAL_CONFIG_SHELL "[$]0" --fallback-echo '\t') 2>/dev/null` &&
+	     test "X$echo_testing_string" = 'X\t' &&
+	     echo_testing_string=`($ORIGINAL_CONFIG_SHELL "[$]0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	     test "X$echo_testing_string" = "X$echo_test_string"; then
+	  CONFIG_SHELL=$ORIGINAL_CONFIG_SHELL
+	  export CONFIG_SHELL
+	  SHELL="$CONFIG_SHELL"
+	  export SHELL
+	  ECHO="$CONFIG_SHELL [$]0 --fallback-echo"
+        elif echo_testing_string=`($CONFIG_SHELL "[$]0" --fallback-echo '\t') 2>/dev/null` &&
+	     test "X$echo_testing_string" = 'X\t' &&
+	     echo_testing_string=`($CONFIG_SHELL "[$]0" --fallback-echo "$echo_test_string") 2>/dev/null` &&
+	     test "X$echo_testing_string" = "X$echo_test_string"; then
+	  ECHO="$CONFIG_SHELL [$]0 --fallback-echo"
+        else
+	  # maybe with a smaller string...
+	  prev=:
+
+	  for cmd in 'echo test' 'sed 2q "[$]0"' 'sed 10q "[$]0"' 'sed 20q "[$]0"' 'sed 50q "[$]0"'; do
+	    if { test "X$echo_test_string" = "X`eval $cmd`"; } 2>/dev/null
+	    then
+	      break
+	    fi
+	    prev="$cmd"
+	  done
+
+	  if test "$prev" != 'sed 50q "[$]0"'; then
+	    echo_test_string=`eval $prev`
+	    export echo_test_string
+	    exec ${ORIGINAL_CONFIG_SHELL-${CONFIG_SHELL-/bin/sh}} "[$]0" ${1+"[$]@"}
+	  else
+	    # Oops.  We lost completely, so just stick with echo.
+	    ECHO=echo
+	  fi
+        fi
+      fi
+    fi
+  fi
+fi
+
+# Copy echo and quote the copy suitably for passing to libtool from
+# the Makefile, instead of quoting the original, which is used later.
+lt_ECHO=$ECHO
+if test "X$lt_ECHO" = "X$CONFIG_SHELL [$]0 --fallback-echo"; then
+   lt_ECHO="$CONFIG_SHELL \\\$\[$]0 --fallback-echo"
+fi
+
+AC_SUBST(lt_ECHO)
+])
+_LT_DECL([], [SHELL], [1], [Shell to use when invoking shell scripts])
+_LT_DECL([], [ECHO], [1],
+    [An echo program that does not interpret backslashes])
+])# _LT_PROG_ECHO_BACKSLASH
+
+
+# _LT_ENABLE_LOCK
+# ---------------
+m4_defun([_LT_ENABLE_LOCK],
+[AC_ARG_ENABLE([libtool-lock],
+  [AS_HELP_STRING([--disable-libtool-lock],
+    [avoid locking (might break parallel builds)])])
+test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
+
+# Some flags need to be propagated to the compiler or linker for good
+# libtool support.
+case $host in
+ia64-*-hpux*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.$ac_objext` in
+      *ELF-32*)
+	HPUX_IA64_MODE="32"
+	;;
+      *ELF-64*)
+	HPUX_IA64_MODE="64"
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+*-*-irix6*)
+  # Find out which ABI we are using.
+  echo '[#]line __oline__ "configure"' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    if test "$lt_cv_prog_gnu_ld" = yes; then
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -melf32bsmip"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -melf32bmipn32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -melf64bmip"
+	;;
+      esac
+    else
+      case `/usr/bin/file conftest.$ac_objext` in
+	*32-bit*)
+	  LD="${LD-ld} -32"
+	  ;;
+	*N32*)
+	  LD="${LD-ld} -n32"
+	  ;;
+	*64-bit*)
+	  LD="${LD-ld} -64"
+	  ;;
+      esac
+    fi
+  fi
+  rm -rf conftest*
+  ;;
+
+x86_64-*kfreebsd*-gnu|x86_64-*linux*|ppc*-*linux*|powerpc*-*linux*| \
+s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.o` in
+      *32-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_i386_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_i386"
+	    ;;
+	  ppc64-*linux*|powerpc64-*linux*)
+	    LD="${LD-ld} -m elf32ppclinux"
+	    ;;
+	  s390x-*linux*)
+	    LD="${LD-ld} -m elf_s390"
+	    ;;
+	  sparc64-*linux*)
+	    LD="${LD-ld} -m elf32_sparc"
+	    ;;
+	esac
+	;;
+      *64-bit*)
+	case $host in
+	  x86_64-*kfreebsd*-gnu)
+	    LD="${LD-ld} -m elf_x86_64_fbsd"
+	    ;;
+	  x86_64-*linux*)
+	    LD="${LD-ld} -m elf_x86_64"
+	    ;;
+	  ppc*-*linux*|powerpc*-*linux*)
+	    LD="${LD-ld} -m elf64ppc"
+	    ;;
+	  s390*-*linux*|s390*-*tpf*)
+	    LD="${LD-ld} -m elf64_s390"
+	    ;;
+	  sparc*-*linux*)
+	    LD="${LD-ld} -m elf64_sparc"
+	    ;;
+	esac
+	;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+*-*-sco3.2v5*)
+  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
+  SAVE_CFLAGS="$CFLAGS"
+  CFLAGS="$CFLAGS -belf"
+  AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf,
+    [AC_LANG_PUSH(C)
+     AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no])
+     AC_LANG_POP])
+  if test x"$lt_cv_cc_needs_belf" != x"yes"; then
+    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
+    CFLAGS="$SAVE_CFLAGS"
+  fi
+  ;;
+sparc*-*solaris*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case `/usr/bin/file conftest.o` in
+    *64-bit*)
+      case $lt_cv_prog_gnu_ld in
+      yes*) LD="${LD-ld} -m elf64_sparc" ;;
+      *)
+	if ${LD-ld} -64 -r -o conftest2.o conftest.o >/dev/null 2>&1; then
+	  LD="${LD-ld} -64"
+	fi
+	;;
+      esac
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+esac
+
+need_locks="$enable_libtool_lock"
+])# _LT_ENABLE_LOCK
+
+
+# _LT_CMD_OLD_ARCHIVE
+# -------------------
+m4_defun([_LT_CMD_OLD_ARCHIVE],
+[AC_CHECK_TOOL(AR, ar, false)
+test -z "$AR" && AR=ar
+test -z "$AR_FLAGS" && AR_FLAGS=cru
+_LT_DECL([], [AR], [1], [The archiver])
+_LT_DECL([], [AR_FLAGS], [1])
+
+AC_CHECK_TOOL(STRIP, strip, :)
+test -z "$STRIP" && STRIP=:
+_LT_DECL([], [STRIP], [1], [A symbol stripping program])
+
+AC_CHECK_TOOL(RANLIB, ranlib, :)
+test -z "$RANLIB" && RANLIB=:
+_LT_DECL([], [RANLIB], [1],
+    [Commands used to install an old-style archive])
+
+# Determine commands to create old-style static archives.
+old_archive_cmds='$AR $AR_FLAGS $oldlib$oldobjs'
+old_postinstall_cmds='chmod 644 $oldlib'
+old_postuninstall_cmds=
+
+if test -n "$RANLIB"; then
+  case $host_os in
+  openbsd*)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB -t \$oldlib"
+    ;;
+  *)
+    old_postinstall_cmds="$old_postinstall_cmds~\$RANLIB \$oldlib"
+    ;;
+  esac
+  old_archive_cmds="$old_archive_cmds~\$RANLIB \$oldlib"
+fi
+_LT_DECL([], [old_postinstall_cmds], [2])
+_LT_DECL([], [old_postuninstall_cmds], [2])
+_LT_TAGDECL([], [old_archive_cmds], [2],
+    [Commands used to build an old-style archive])
+])# _LT_CMD_OLD_ARCHIVE
+
+
+# _LT_COMPILER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS,
+#		[OUTPUT-FILE], [ACTION-SUCCESS], [ACTION-FAILURE])
+# ----------------------------------------------------------------
+# Check whether the given compiler option works
+AC_DEFUN([_LT_COMPILER_OPTION],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_SED])dnl
+AC_CACHE_CHECK([$1], [$2],
+  [$2=no
+   m4_if([$4], , [ac_outfile=conftest.$ac_objext], [ac_outfile=$4])
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+   lt_compiler_flag="$3"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   # The option is referenced via a variable to avoid confusing sed.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:__oline__: $lt_compile\"" >&AS_MESSAGE_LOG_FD)
+   (eval "$lt_compile" 2>conftest.err)
+   ac_status=$?
+   cat conftest.err >&AS_MESSAGE_LOG_FD
+   echo "$as_me:__oline__: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
+   if (exit $ac_status) && test -s "$ac_outfile"; then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings other than the usual output.
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' >conftest.exp
+     $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+     if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
+       $2=yes
+     fi
+   fi
+   $RM conftest*
+])
+
+if test x"[$]$2" = xyes; then
+    m4_if([$5], , :, [$5])
+else
+    m4_if([$6], , :, [$6])
+fi
+])# _LT_COMPILER_OPTION
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_COMPILER_OPTION], [_LT_COMPILER_OPTION])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_COMPILER_OPTION], [])
+
+
+# _LT_LINKER_OPTION(MESSAGE, VARIABLE-NAME, FLAGS,
+#                  [ACTION-SUCCESS], [ACTION-FAILURE])
+# ----------------------------------------------------
+# Check whether the given linker option works
+AC_DEFUN([_LT_LINKER_OPTION],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_SED])dnl
+AC_CACHE_CHECK([$1], [$2],
+  [$2=no
+   save_LDFLAGS="$LDFLAGS"
+   LDFLAGS="$LDFLAGS $3"
+   echo "$lt_simple_link_test_code" > conftest.$ac_ext
+   if (eval $ac_link 2>conftest.err) && test -s conftest$ac_exeext; then
+     # The linker can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     if test -s conftest.err; then
+       # Append any errors to the config.log.
+       cat conftest.err 1>&AS_MESSAGE_LOG_FD
+       $ECHO "X$_lt_linker_boilerplate" | $Xsed -e '/^$/d' > conftest.exp
+       $SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
+       if diff conftest.exp conftest.er2 >/dev/null; then
+         $2=yes
+       fi
+     else
+       $2=yes
+     fi
+   fi
+   $RM -r conftest*
+   LDFLAGS="$save_LDFLAGS"
+])
+
+if test x"[$]$2" = xyes; then
+    m4_if([$4], , :, [$4])
+else
+    m4_if([$5], , :, [$5])
+fi
+])# _LT_LINKER_OPTION
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_LINKER_OPTION], [_LT_LINKER_OPTION])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_LINKER_OPTION], [])
+
+
+# LT_CMD_MAX_LEN
+#---------------
+AC_DEFUN([LT_CMD_MAX_LEN],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+# find the maximum length of command line arguments
+AC_MSG_CHECKING([the maximum length of command line arguments])
+AC_CACHE_VAL([lt_cv_sys_max_cmd_len], [dnl
+  i=0
+  teststring="ABCD"
+
+  case $build_os in
+  msdosdjgpp*)
+    # On DJGPP, this test can blow up pretty badly due to problems in libc
+    # (any single argument exceeding 2000 bytes causes a buffer overrun
+    # during glob expansion).  Even if it were fixed, the result of this
+    # check would be larger than it should be.
+    lt_cv_sys_max_cmd_len=12288;    # 12K is about right
+    ;;
+
+  gnu*)
+    # Under GNU Hurd, this test is not required because there is
+    # no limit to the length of command line arguments.
+    # Libtool will interpret -1 as no limit whatsoever
+    lt_cv_sys_max_cmd_len=-1;
+    ;;
+
+  cygwin* | mingw* | cegcc*)
+    # On Win9x/ME, this test blows up -- it succeeds, but takes
+    # about 5 minutes as the teststring grows exponentially.
+    # Worse, since 9x/ME are not pre-emptively multitasking,
+    # you end up with a "frozen" computer, even though with patience
+    # the test eventually succeeds (with a max line length of 256k).
+    # Instead, let's just punt: use the minimum linelength reported by
+    # all of the supported platforms: 8192 (on NT/2K/XP).
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  amigaos*)
+    # On AmigaOS with pdksh, this test takes hours, literally.
+    # So we just punt and use a minimum line length of 8192.
+    lt_cv_sys_max_cmd_len=8192;
+    ;;
+
+  netbsd* | freebsd* | openbsd* | darwin* | dragonfly*)
+    # This has been around since 386BSD, at least.  Likely further.
+    if test -x /sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/sbin/sysctl -n kern.argmax`
+    elif test -x /usr/sbin/sysctl; then
+      lt_cv_sys_max_cmd_len=`/usr/sbin/sysctl -n kern.argmax`
+    else
+      lt_cv_sys_max_cmd_len=65536	# usable default for all BSDs
+    fi
+    # And add a safety zone
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    ;;
+
+  interix*)
+    # We know the value 262144 and hardcode it with a safety zone (like BSD)
+    lt_cv_sys_max_cmd_len=196608
+    ;;
+
+  osf*)
+    # Dr. Hans Ekkehard Plesser reports seeing a kernel panic running configure
+    # due to this test when exec_disable_arg_limit is 1 on Tru64. It is not
+    # nice to cause kernel panics so lets avoid the loop below.
+    # First set a reasonable default.
+    lt_cv_sys_max_cmd_len=16384
+    #
+    if test -x /sbin/sysconfig; then
+      case `/sbin/sysconfig -q proc exec_disable_arg_limit` in
+        *1*) lt_cv_sys_max_cmd_len=-1 ;;
+      esac
+    fi
+    ;;
+  sco3.2v5*)
+    lt_cv_sys_max_cmd_len=102400
+    ;;
+  sysv5* | sco5v6* | sysv4.2uw2*)
+    kargmax=`grep ARG_MAX /etc/conf/cf.d/stune 2>/dev/null`
+    if test -n "$kargmax"; then
+      lt_cv_sys_max_cmd_len=`echo $kargmax | sed 's/.*[[	 ]]//'`
+    else
+      lt_cv_sys_max_cmd_len=32768
+    fi
+    ;;
+  *)
+    lt_cv_sys_max_cmd_len=`(getconf ARG_MAX) 2> /dev/null`
+    if test -n "$lt_cv_sys_max_cmd_len"; then
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 4`
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \* 3`
+    else
+      # Make teststring a little bigger before we do anything with it.
+      # a 1K string should be a reasonable start.
+      for i in 1 2 3 4 5 6 7 8 ; do
+        teststring=$teststring$teststring
+      done
+      SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
+      # If test is not a shell built-in, we'll probably end up computing a
+      # maximum length that is only half of the actual maximum length, but
+      # we can't tell.
+      while { test "X"`$SHELL [$]0 --fallback-echo "X$teststring$teststring" 2>/dev/null` \
+	         = "XX$teststring$teststring"; } >/dev/null 2>&1 &&
+	      test $i != 17 # 1/2 MB should be enough
+      do
+        i=`expr $i + 1`
+        teststring=$teststring$teststring
+      done
+      # Only check the string length outside the loop.
+      lt_cv_sys_max_cmd_len=`expr "X$teststring" : ".*" 2>&1`
+      teststring=
+      # Add a significant safety factor because C++ compilers can tack on
+      # massive amounts of additional arguments before passing them to the
+      # linker.  It appears as though 1/2 is a usable value.
+      lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
+    fi
+    ;;
+  esac
+])
+if test -n $lt_cv_sys_max_cmd_len ; then
+  AC_MSG_RESULT($lt_cv_sys_max_cmd_len)
+else
+  AC_MSG_RESULT(none)
+fi
+max_cmd_len=$lt_cv_sys_max_cmd_len
+_LT_DECL([], [max_cmd_len], [0],
+    [What is the maximum length of a command?])
+])# LT_CMD_MAX_LEN
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_SYS_MAX_CMD_LEN], [LT_CMD_MAX_LEN])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_SYS_MAX_CMD_LEN], [])
+
+
+# _LT_HEADER_DLFCN
+# ----------------
+m4_defun([_LT_HEADER_DLFCN],
+[AC_CHECK_HEADERS([dlfcn.h], [], [], [AC_INCLUDES_DEFAULT])dnl
+])# _LT_HEADER_DLFCN
+
+
+# _LT_TRY_DLOPEN_SELF (ACTION-IF-TRUE, ACTION-IF-TRUE-W-USCORE,
+#                      ACTION-IF-FALSE, ACTION-IF-CROSS-COMPILING)
+# ----------------------------------------------------------------
+m4_defun([_LT_TRY_DLOPEN_SELF],
+[m4_require([_LT_HEADER_DLFCN])dnl
+if test "$cross_compiling" = yes; then :
+  [$4]
+else
+  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+  lt_status=$lt_dlunknown
+  cat > conftest.$ac_ext <<_LT_EOF
+[#line __oline__ "configure"
+#include "confdefs.h"
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#include <stdio.h>
+
+#ifdef RTLD_GLOBAL
+#  define LT_DLGLOBAL		RTLD_GLOBAL
+#else
+#  ifdef DL_GLOBAL
+#    define LT_DLGLOBAL		DL_GLOBAL
+#  else
+#    define LT_DLGLOBAL		0
+#  endif
+#endif
+
+/* We may have to define LT_DLLAZY_OR_NOW in the command line if we
+   find out it does not work in some platform. */
+#ifndef LT_DLLAZY_OR_NOW
+#  ifdef RTLD_LAZY
+#    define LT_DLLAZY_OR_NOW		RTLD_LAZY
+#  else
+#    ifdef DL_LAZY
+#      define LT_DLLAZY_OR_NOW		DL_LAZY
+#    else
+#      ifdef RTLD_NOW
+#        define LT_DLLAZY_OR_NOW	RTLD_NOW
+#      else
+#        ifdef DL_NOW
+#          define LT_DLLAZY_OR_NOW	DL_NOW
+#        else
+#          define LT_DLLAZY_OR_NOW	0
+#        endif
+#      endif
+#    endif
+#  endif
+#endif
+
+void fnord() { int i=42;}
+int main ()
+{
+  void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
+  int status = $lt_dlunknown;
+
+  if (self)
+    {
+      if (dlsym (self,"fnord"))       status = $lt_dlno_uscore;
+      else if (dlsym( self,"_fnord")) status = $lt_dlneed_uscore;
+      /* dlclose (self); */
+    }
+  else
+    puts (dlerror ());
+
+  return status;
+}]
+_LT_EOF
+  if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} 2>/dev/null; then
+    (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null
+    lt_status=$?
+    case x$lt_status in
+      x$lt_dlno_uscore) $1 ;;
+      x$lt_dlneed_uscore) $2 ;;
+      x$lt_dlunknown|x*) $3 ;;
+    esac
+  else :
+    # compilation failed
+    $3
+  fi
+fi
+rm -fr conftest*
+])# _LT_TRY_DLOPEN_SELF
+
+
+# LT_SYS_DLOPEN_SELF
+# ------------------
+AC_DEFUN([LT_SYS_DLOPEN_SELF],
+[m4_require([_LT_HEADER_DLFCN])dnl
+if test "x$enable_dlopen" != xyes; then
+  enable_dlopen=unknown
+  enable_dlopen_self=unknown
+  enable_dlopen_self_static=unknown
+else
+  lt_cv_dlopen=no
+  lt_cv_dlopen_libs=
+
+  case $host_os in
+  beos*)
+    lt_cv_dlopen="load_add_on"
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ;;
+
+  mingw* | pw32* | cegcc*)
+    lt_cv_dlopen="LoadLibrary"
+    lt_cv_dlopen_libs=
+    ;;
+
+  cygwin*)
+    lt_cv_dlopen="dlopen"
+    lt_cv_dlopen_libs=
+    ;;
+
+  darwin*)
+  # if libdl is installed we need to link against it
+    AC_CHECK_LIB([dl], [dlopen],
+		[lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"],[
+    lt_cv_dlopen="dyld"
+    lt_cv_dlopen_libs=
+    lt_cv_dlopen_self=yes
+    ])
+    ;;
+
+  *)
+    AC_CHECK_FUNC([shl_load],
+	  [lt_cv_dlopen="shl_load"],
+      [AC_CHECK_LIB([dld], [shl_load],
+	    [lt_cv_dlopen="shl_load" lt_cv_dlopen_libs="-ldld"],
+	[AC_CHECK_FUNC([dlopen],
+	      [lt_cv_dlopen="dlopen"],
+	  [AC_CHECK_LIB([dl], [dlopen],
+		[lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-ldl"],
+	    [AC_CHECK_LIB([svld], [dlopen],
+		  [lt_cv_dlopen="dlopen" lt_cv_dlopen_libs="-lsvld"],
+	      [AC_CHECK_LIB([dld], [dld_link],
+		    [lt_cv_dlopen="dld_link" lt_cv_dlopen_libs="-ldld"])
+	      ])
+	    ])
+	  ])
+	])
+      ])
+    ;;
+  esac
+
+  if test "x$lt_cv_dlopen" != xno; then
+    enable_dlopen=yes
+  else
+    enable_dlopen=no
+  fi
+
+  case $lt_cv_dlopen in
+  dlopen)
+    save_CPPFLAGS="$CPPFLAGS"
+    test "x$ac_cv_header_dlfcn_h" = xyes && CPPFLAGS="$CPPFLAGS -DHAVE_DLFCN_H"
+
+    save_LDFLAGS="$LDFLAGS"
+    wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $export_dynamic_flag_spec\"
+
+    save_LIBS="$LIBS"
+    LIBS="$lt_cv_dlopen_libs $LIBS"
+
+    AC_CACHE_CHECK([whether a program can dlopen itself],
+	  lt_cv_dlopen_self, [dnl
+	  _LT_TRY_DLOPEN_SELF(
+	    lt_cv_dlopen_self=yes, lt_cv_dlopen_self=yes,
+	    lt_cv_dlopen_self=no, lt_cv_dlopen_self=cross)
+    ])
+
+    if test "x$lt_cv_dlopen_self" = xyes; then
+      wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
+      AC_CACHE_CHECK([whether a statically linked program can dlopen itself],
+	  lt_cv_dlopen_self_static, [dnl
+	  _LT_TRY_DLOPEN_SELF(
+	    lt_cv_dlopen_self_static=yes, lt_cv_dlopen_self_static=yes,
+	    lt_cv_dlopen_self_static=no,  lt_cv_dlopen_self_static=cross)
+      ])
+    fi
+
+    CPPFLAGS="$save_CPPFLAGS"
+    LDFLAGS="$save_LDFLAGS"
+    LIBS="$save_LIBS"
+    ;;
+  esac
+
+  case $lt_cv_dlopen_self in
+  yes|no) enable_dlopen_self=$lt_cv_dlopen_self ;;
+  *) enable_dlopen_self=unknown ;;
+  esac
+
+  case $lt_cv_dlopen_self_static in
+  yes|no) enable_dlopen_self_static=$lt_cv_dlopen_self_static ;;
+  *) enable_dlopen_self_static=unknown ;;
+  esac
+fi
+_LT_DECL([dlopen_support], [enable_dlopen], [0],
+	 [Whether dlopen is supported])
+_LT_DECL([dlopen_self], [enable_dlopen_self], [0],
+	 [Whether dlopen of programs is supported])
+_LT_DECL([dlopen_self_static], [enable_dlopen_self_static], [0],
+	 [Whether dlopen of statically linked programs is supported])
+])# LT_SYS_DLOPEN_SELF
+
+# Old name:
+AU_ALIAS([AC_LIBTOOL_DLOPEN_SELF], [LT_SYS_DLOPEN_SELF])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_DLOPEN_SELF], [])
+
+
+# _LT_COMPILER_C_O([TAGNAME])
+# ---------------------------
+# Check to see if options -c and -o are simultaneously supported by compiler.
+# This macro does not hard code the compiler like AC_PROG_CC_C_O.
+m4_defun([_LT_COMPILER_C_O],
+[m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+AC_CACHE_CHECK([if $compiler supports -c -o file.$ac_objext],
+  [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)],
+  [_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=no
+   $RM -r conftest 2>/dev/null
+   mkdir conftest
+   cd conftest
+   mkdir out
+   echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+   lt_compiler_flag="-o out/conftest2.$ac_objext"
+   # Insert the option either (1) after the last *FLAGS variable, or
+   # (2) before a word containing "conftest.", or (3) at the end.
+   # Note that $ac_compile itself does not contain backslashes and begins
+   # with a dollar sign (not a hyphen), so the echo should work correctly.
+   lt_compile=`echo "$ac_compile" | $SED \
+   -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
+   -e 's: [[^ ]]*conftest\.: $lt_compiler_flag&:; t' \
+   -e 's:$: $lt_compiler_flag:'`
+   (eval echo "\"\$as_me:__oline__: $lt_compile\"" >&AS_MESSAGE_LOG_FD)
+   (eval "$lt_compile" 2>out/conftest.err)
+   ac_status=$?
+   cat out/conftest.err >&AS_MESSAGE_LOG_FD
+   echo "$as_me:__oline__: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
+   if (exit $ac_status) && test -s out/conftest2.$ac_objext
+   then
+     # The compiler can only warn and ignore the option if not recognized
+     # So say no if there are warnings
+     $ECHO "X$_lt_compiler_boilerplate" | $Xsed -e '/^$/d' > out/conftest.exp
+     $SED '/^$/d; /^ *+/d' out/conftest.err >out/conftest.er2
+     if test ! -s out/conftest.er2 || diff out/conftest.exp out/conftest.er2 >/dev/null; then
+       _LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes
+     fi
+   fi
+   chmod u+w . 2>&AS_MESSAGE_LOG_FD
+   $RM conftest*
+   # SGI C++ compiler will create directory out/ii_files/ for
+   # template instantiation
+   test -d out/ii_files && $RM out/ii_files/* && rmdir out/ii_files
+   $RM out/* && rmdir out
+   cd ..
+   $RM -r conftest
+   $RM conftest*
+])
+_LT_TAGDECL([compiler_c_o], [lt_cv_prog_compiler_c_o], [1],
+	[Does compiler simultaneously support -c and -o options?])
+])# _LT_COMPILER_C_O
+
+
+# _LT_COMPILER_FILE_LOCKS([TAGNAME])
+# ----------------------------------
+# Check to see if we can do hard links to lock some files if needed
+m4_defun([_LT_COMPILER_FILE_LOCKS],
+[m4_require([_LT_ENABLE_LOCK])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+_LT_COMPILER_C_O([$1])
+
+hard_links="nottested"
+if test "$_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)" = no && test "$need_locks" != no; then
+  # do not overwrite the value of need_locks provided by the user
+  AC_MSG_CHECKING([if we can lock with hard links])
+  hard_links=yes
+  $RM conftest*
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  touch conftest.a
+  ln conftest.a conftest.b 2>&5 || hard_links=no
+  ln conftest.a conftest.b 2>/dev/null && hard_links=no
+  AC_MSG_RESULT([$hard_links])
+  if test "$hard_links" = no; then
+    AC_MSG_WARN([`$CC' does not support `-c -o', so `make -j' may be unsafe])
+    need_locks=warn
+  fi
+else
+  need_locks=no
+fi
+_LT_DECL([], [need_locks], [1], [Must we lock files when doing compilation?])
+])# _LT_COMPILER_FILE_LOCKS
+
+
+# _LT_CHECK_OBJDIR
+# ----------------
+m4_defun([_LT_CHECK_OBJDIR],
+[AC_CACHE_CHECK([for objdir], [lt_cv_objdir],
+[rm -f .libs 2>/dev/null
+mkdir .libs 2>/dev/null
+if test -d .libs; then
+  lt_cv_objdir=.libs
+else
+  # MS-DOS does not allow filenames that begin with a dot.
+  lt_cv_objdir=_libs
+fi
+rmdir .libs 2>/dev/null])
+objdir=$lt_cv_objdir
+_LT_DECL([], [objdir], [0],
+         [The name of the directory that contains temporary libtool files])dnl
+m4_pattern_allow([LT_OBJDIR])dnl
+AC_DEFINE_UNQUOTED(LT_OBJDIR, "$lt_cv_objdir/",
+  [Define to the sub-directory in which libtool stores uninstalled libraries.])
+])# _LT_CHECK_OBJDIR
+
+
+# _LT_LINKER_HARDCODE_LIBPATH([TAGNAME])
+# --------------------------------------
+# Check hardcoding attributes.
+m4_defun([_LT_LINKER_HARDCODE_LIBPATH],
+[AC_MSG_CHECKING([how to hardcode library paths into programs])
+_LT_TAGVAR(hardcode_action, $1)=
+if test -n "$_LT_TAGVAR(hardcode_libdir_flag_spec, $1)" ||
+   test -n "$_LT_TAGVAR(runpath_var, $1)" ||
+   test "X$_LT_TAGVAR(hardcode_automatic, $1)" = "Xyes" ; then
+
+  # We can hardcode non-existent directories.
+  if test "$_LT_TAGVAR(hardcode_direct, $1)" != no &&
+     # If the only mechanism to avoid hardcoding is shlibpath_var, we
+     # have to relink, otherwise we might link with an installed library
+     # when we should be linking with a yet-to-be-installed one
+     ## test "$_LT_TAGVAR(hardcode_shlibpath_var, $1)" != no &&
+     test "$_LT_TAGVAR(hardcode_minus_L, $1)" != no; then
+    # Linking always hardcodes the temporary library directory.
+    _LT_TAGVAR(hardcode_action, $1)=relink
+  else
+    # We can link without hardcoding, and we can hardcode nonexisting dirs.
+    _LT_TAGVAR(hardcode_action, $1)=immediate
+  fi
+else
+  # We cannot hardcode anything, or else we can only hardcode existing
+  # directories.
+  _LT_TAGVAR(hardcode_action, $1)=unsupported
+fi
+AC_MSG_RESULT([$_LT_TAGVAR(hardcode_action, $1)])
+
+if test "$_LT_TAGVAR(hardcode_action, $1)" = relink ||
+   test "$_LT_TAGVAR(inherit_rpath, $1)" = yes; then
+  # Fast installation is not supported
+  enable_fast_install=no
+elif test "$shlibpath_overrides_runpath" = yes ||
+     test "$enable_shared" = no; then
+  # Fast installation is not necessary
+  enable_fast_install=needless
+fi
+_LT_TAGDECL([], [hardcode_action], [0],
+    [How to hardcode a shared library path into an executable])
+])# _LT_LINKER_HARDCODE_LIBPATH
+
+
+# _LT_CMD_STRIPLIB
+# ----------------
+m4_defun([_LT_CMD_STRIPLIB],
+[m4_require([_LT_DECL_EGREP])
+striplib=
+old_striplib=
+AC_MSG_CHECKING([whether stripping libraries is possible])
+if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
+  test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
+  test -z "$striplib" && striplib="$STRIP --strip-unneeded"
+  AC_MSG_RESULT([yes])
+else
+# FIXME - insert some real tests, host_os isn't really good enough
+  case $host_os in
+  darwin*)
+    if test -n "$STRIP" ; then
+      striplib="$STRIP -x"
+      old_striplib="$STRIP -S"
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_RESULT([no])
+    fi
+    ;;
+  *)
+    AC_MSG_RESULT([no])
+    ;;
+  esac
+fi
+_LT_DECL([], [old_striplib], [1], [Commands to strip libraries])
+_LT_DECL([], [striplib], [1])
+])# _LT_CMD_STRIPLIB
+
+
+# _LT_SYS_DYNAMIC_LINKER([TAG])
+# -----------------------------
+# PORTME Fill in your ld.so characteristics
+m4_defun([_LT_SYS_DYNAMIC_LINKER],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_OBJDUMP])dnl
+m4_require([_LT_DECL_SED])dnl
+AC_MSG_CHECKING([dynamic linker characteristics])
+m4_if([$1],
+	[], [
+if test "$GCC" = yes; then
+  case $host_os in
+    darwin*) lt_awk_arg="/^libraries:/,/LR/" ;;
+    *) lt_awk_arg="/^libraries:/" ;;
+  esac
+  lt_search_path_spec=`$CC -print-search-dirs | awk $lt_awk_arg | $SED -e "s/^libraries://" -e "s,=/,/,g"`
+  if $ECHO "$lt_search_path_spec" | $GREP ';' >/dev/null ; then
+    # if the path contains ";" then we assume it to be the separator
+    # otherwise default to the standard path separator (i.e. ":") - it is
+    # assumed that no part of a normal pathname contains ";" but that should
+    # okay in the real world where ";" in dirpaths is itself problematic.
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED -e 's/;/ /g'`
+  else
+    lt_search_path_spec=`$ECHO "$lt_search_path_spec" | $SED  -e "s/$PATH_SEPARATOR/ /g"`
+  fi
+  # Ok, now we have the path, separated by spaces, we can step through it
+  # and add multilib dir if necessary.
+  lt_tmp_lt_search_path_spec=
+  lt_multi_os_dir=`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null`
+  for lt_sys_path in $lt_search_path_spec; do
+    if test -d "$lt_sys_path/$lt_multi_os_dir"; then
+      lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path/$lt_multi_os_dir"
+    else
+      test -d "$lt_sys_path" && \
+	lt_tmp_lt_search_path_spec="$lt_tmp_lt_search_path_spec $lt_sys_path"
+    fi
+  done
+  lt_search_path_spec=`$ECHO $lt_tmp_lt_search_path_spec | awk '
+BEGIN {RS=" "; FS="/|\n";} {
+  lt_foo="";
+  lt_count=0;
+  for (lt_i = NF; lt_i > 0; lt_i--) {
+    if ($lt_i != "" && $lt_i != ".") {
+      if ($lt_i == "..") {
+        lt_count++;
+      } else {
+        if (lt_count == 0) {
+          lt_foo="/" $lt_i lt_foo;
+        } else {
+          lt_count--;
+        }
+      }
+    }
+  }
+  if (lt_foo != "") { lt_freq[[lt_foo]]++; }
+  if (lt_freq[[lt_foo]] == 1) { print lt_foo; }
+}'`
+  sys_lib_search_path_spec=`$ECHO $lt_search_path_spec`
+else
+  sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
+fi])
+library_names_spec=
+libname_spec='lib$name'
+soname_spec=
+shrext_cmds=".so"
+postinstall_cmds=
+postuninstall_cmds=
+finish_cmds=
+finish_eval=
+shlibpath_var=
+shlibpath_overrides_runpath=unknown
+version_type=none
+dynamic_linker="$host_os ld.so"
+sys_lib_dlsearch_path_spec="/lib /usr/lib"
+need_lib_prefix=unknown
+hardcode_into_libs=no
+
+# when you set need_version to no, make sure it does not cause -set_version
+# flags to be left without arguments
+need_version=unknown
+
+case $host_os in
+aix3*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix $libname.a'
+  shlibpath_var=LIBPATH
+
+  # AIX 3 has no versioning support, so we append a major version to the name.
+  soname_spec='${libname}${release}${shared_ext}$major'
+  ;;
+
+aix[[4-9]]*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  hardcode_into_libs=yes
+  if test "$host_cpu" = ia64; then
+    # AIX 5 supports IA64
+    library_names_spec='${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext}$versuffix $libname${shared_ext}'
+    shlibpath_var=LD_LIBRARY_PATH
+  else
+    # With GCC up to 2.95.x, collect2 would create an import file
+    # for dependence libraries.  The import file would start with
+    # the line `#! .'.  This would cause the generated library to
+    # depend on `.', always an invalid library.  This was fixed in
+    # development snapshots of GCC prior to 3.0.
+    case $host_os in
+      aix4 | aix4.[[01]] | aix4.[[01]].*)
+      if { echo '#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 97)'
+	   echo ' yes '
+	   echo '#endif'; } | ${CC} -E - | $GREP yes > /dev/null; then
+	:
+      else
+	can_build_shared=no
+      fi
+      ;;
+    esac
+    # AIX (on Power*) has no versioning support, so currently we can not hardcode correct
+    # soname into executable. Probably we can add versioning support to
+    # collect2, so additional links can be useful in future.
+    if test "$aix_use_runtimelinking" = yes; then
+      # If using run time linking (on AIX 4.2 or later) use lib<name>.so
+      # instead of lib<name>.a to let people know that these are not
+      # typical AIX shared libraries.
+      library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    else
+      # We preserve .a as extension for shared libraries through AIX4.2
+      # and later when we are not doing run time linking.
+      library_names_spec='${libname}${release}.a $libname.a'
+      soname_spec='${libname}${release}${shared_ext}$major'
+    fi
+    shlibpath_var=LIBPATH
+  fi
+  ;;
+
+amigaos*)
+  case $host_cpu in
+  powerpc)
+    # Since July 2007 AmigaOS4 officially supports .so libraries.
+    # When compiling the executable, add -use-dynld -Lsobjs: to the compileline.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    ;;
+  m68k)
+    library_names_spec='$libname.ixlibrary $libname.a'
+    # Create ${libname}_ixlibrary.a entries in /sys/libs.
+    finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$ECHO "X$lib" | $Xsed -e '\''s%^.*/\([[^/]]*\)\.ixlibrary$%\1%'\''`; test $RM /sys/libs/${libname}_ixlibrary.a; $show "cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a"; cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a || exit 1; done'
+    ;;
+  esac
+  ;;
+
+beos*)
+  library_names_spec='${libname}${shared_ext}'
+  dynamic_linker="$host_os ld.so"
+  shlibpath_var=LIBRARY_PATH
+  ;;
+
+bsdi[[45]]*)
+  version_type=linux
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
+  sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
+  # the default ld.so.conf also contains /usr/contrib/lib and
+  # /usr/X11R6/lib (/usr/X11 is a link to /usr/X11R6), but let us allow
+  # libtool to hard-code these into programs
+  ;;
+
+cygwin* | mingw* | pw32* | cegcc*)
+  version_type=windows
+  shrext_cmds=".dll"
+  need_version=no
+  need_lib_prefix=no
+
+  case $GCC,$host_os in
+  yes,cygwin* | yes,mingw* | yes,pw32* | yes,cegcc*)
+    library_names_spec='$libname.dll.a'
+    # DLL is installed to $(libdir)/../bin by postinstall_cmds
+    postinstall_cmds='base_file=`basename \${file}`~
+      dlpath=`$SHELL 2>&1 -c '\''. $dir/'\''\${base_file}'\''i; echo \$dlname'\''`~
+      dldir=$destdir/`dirname \$dlpath`~
+      test -d \$dldir || mkdir -p \$dldir~
+      $install_prog $dir/$dlname \$dldir/$dlname~
+      chmod a+x \$dldir/$dlname~
+      if test -n '\''$stripme'\'' && test -n '\''$striplib'\''; then
+        eval '\''$striplib \$dldir/$dlname'\'' || exit \$?;
+      fi'
+    postuninstall_cmds='dldll=`$SHELL 2>&1 -c '\''. $file; echo \$dlname'\''`~
+      dlpath=$dir/\$dldll~
+       $RM \$dlpath'
+    shlibpath_overrides_runpath=yes
+
+    case $host_os in
+    cygwin*)
+      # Cygwin DLLs use 'cyg' prefix rather than 'lib'
+      soname_spec='`echo ${libname} | sed -e 's/^lib/cyg/'``echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}'
+      sys_lib_search_path_spec="/usr/lib /lib/w32api /lib /usr/local/lib"
+      ;;
+    mingw* | cegcc*)
+      # MinGW DLLs use traditional 'lib' prefix
+      soname_spec='${libname}`echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}'
+      sys_lib_search_path_spec=`$CC -print-search-dirs | $GREP "^libraries:" | $SED -e "s/^libraries://" -e "s,=/,/,g"`
+      if $ECHO "$sys_lib_search_path_spec" | [$GREP ';[c-zC-Z]:/' >/dev/null]; then
+        # It is most probably a Windows format PATH printed by
+        # mingw gcc, but we are running on Cygwin. Gcc prints its search
+        # path with ; separators, and with drive letters. We can handle the
+        # drive letters (cygwin fileutils understands them), so leave them,
+        # especially as we might pass files found there to a mingw objdump,
+        # which wouldn't understand a cygwinified path. Ahh.
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED -e 's/;/ /g'`
+      else
+        sys_lib_search_path_spec=`$ECHO "$sys_lib_search_path_spec" | $SED  -e "s/$PATH_SEPARATOR/ /g"`
+      fi
+      ;;
+    pw32*)
+      # pw32 DLLs use 'pw' prefix rather than 'lib'
+      library_names_spec='`echo ${libname} | sed -e 's/^lib/pw/'``echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext}'
+      ;;
+    esac
+    ;;
+
+  *)
+    library_names_spec='${libname}`echo ${release} | $SED -e 's/[[.]]/-/g'`${versuffix}${shared_ext} $libname.lib'
+    ;;
+  esac
+  dynamic_linker='Win32 ld.exe'
+  # FIXME: first we should search . and the directory the executable is in
+  shlibpath_var=PATH
+  ;;
+
+darwin* | rhapsody*)
+  dynamic_linker="$host_os dyld"
+  version_type=darwin
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${major}$shared_ext ${libname}$shared_ext'
+  soname_spec='${libname}${release}${major}$shared_ext'
+  shlibpath_overrides_runpath=yes
+  shlibpath_var=DYLD_LIBRARY_PATH
+  shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'
+m4_if([$1], [],[
+  sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/local/lib"])
+  sys_lib_dlsearch_path_spec='/usr/local/lib /lib /usr/lib'
+  ;;
+
+dgux*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname$shared_ext'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+freebsd1*)
+  dynamic_linker=no
+  ;;
+
+freebsd* | dragonfly*)
+  # DragonFly does not have aout.  When/if they implement a new
+  # versioning mechanism, adjust this.
+  if test -x /usr/bin/objformat; then
+    objformat=`/usr/bin/objformat`
+  else
+    case $host_os in
+    freebsd[[123]]*) objformat=aout ;;
+    *) objformat=elf ;;
+    esac
+  fi
+  version_type=freebsd-$objformat
+  case $version_type in
+    freebsd-elf*)
+      library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}'
+      need_version=no
+      need_lib_prefix=no
+      ;;
+    freebsd-*)
+      library_names_spec='${libname}${release}${shared_ext}$versuffix $libname${shared_ext}$versuffix'
+      need_version=yes
+      ;;
+  esac
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_os in
+  freebsd2*)
+    shlibpath_overrides_runpath=yes
+    ;;
+  freebsd3.[[01]]* | freebsdelf3.[[01]]*)
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  freebsd3.[[2-9]]* | freebsdelf3.[[2-9]]* | \
+  freebsd4.[[0-5]] | freebsdelf4.[[0-5]] | freebsd4.1.1 | freebsdelf4.1.1)
+    shlibpath_overrides_runpath=no
+    hardcode_into_libs=yes
+    ;;
+  *) # from 4.6 on, and DragonFly
+    shlibpath_overrides_runpath=yes
+    hardcode_into_libs=yes
+    ;;
+  esac
+  ;;
+
+gnu*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}${major} ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  hardcode_into_libs=yes
+  ;;
+
+hpux9* | hpux10* | hpux11*)
+  # Give a soname corresponding to the major version so that dld.sl refuses to
+  # link against other versions.
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  case $host_cpu in
+  ia64*)
+    shrext_cmds='.so'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.so"
+    shlibpath_var=LD_LIBRARY_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    if test "X$HPUX_IA64_MODE" = X32; then
+      sys_lib_search_path_spec="/usr/lib/hpux32 /usr/local/lib/hpux32 /usr/local/lib"
+    else
+      sys_lib_search_path_spec="/usr/lib/hpux64 /usr/local/lib/hpux64"
+    fi
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  hppa*64*)
+    shrext_cmds='.sl'
+    hardcode_into_libs=yes
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=LD_LIBRARY_PATH # How should we handle SHLIB_PATH
+    shlibpath_overrides_runpath=yes # Unless +noenvvar is specified.
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    sys_lib_search_path_spec="/usr/lib/pa20_64 /usr/ccs/lib/pa20_64"
+    sys_lib_dlsearch_path_spec=$sys_lib_search_path_spec
+    ;;
+  *)
+    shrext_cmds='.sl'
+    dynamic_linker="$host_os dld.sl"
+    shlibpath_var=SHLIB_PATH
+    shlibpath_overrides_runpath=no # +s is required to enable SHLIB_PATH
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    ;;
+  esac
+  # HP-UX runs *really* slowly unless shared libraries are mode 555.
+  postinstall_cmds='chmod 555 $lib'
+  ;;
+
+interix[[3-9]]*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  dynamic_linker='Interix 3.x ld.so.1 (PE, like ELF)'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $host_os in
+    nonstopux*) version_type=nonstopux ;;
+    *)
+	if test "$lt_cv_prog_gnu_ld" = yes; then
+		version_type=linux
+	else
+		version_type=irix
+	fi ;;
+  esac
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='${libname}${release}${shared_ext}$major'
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${release}${shared_ext} $libname${shared_ext}'
+  case $host_os in
+  irix5* | nonstopux*)
+    libsuff= shlibsuff=
+    ;;
+  *)
+    case $LD in # libtool.m4 will add one of these switches to LD
+    *-32|*"-32 "|*-melf32bsmip|*"-melf32bsmip ")
+      libsuff= shlibsuff= libmagic=32-bit;;
+    *-n32|*"-n32 "|*-melf32bmipn32|*"-melf32bmipn32 ")
+      libsuff=32 shlibsuff=N32 libmagic=N32;;
+    *-64|*"-64 "|*-melf64bmip|*"-melf64bmip ")
+      libsuff=64 shlibsuff=64 libmagic=64-bit;;
+    *) libsuff= shlibsuff= libmagic=never-match;;
+    esac
+    ;;
+  esac
+  shlibpath_var=LD_LIBRARY${shlibsuff}_PATH
+  shlibpath_overrides_runpath=no
+  sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}"
+  sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}"
+  hardcode_into_libs=yes
+  ;;
+
+# No shared lib support for Linux oldld, aout, or coff.
+linux*oldld* | linux*aout* | linux*coff*)
+  dynamic_linker=no
+  ;;
+
+# This must be Linux ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  # Some binutils ld are patched to set DT_RUNPATH
+  save_LDFLAGS=$LDFLAGS
+  save_libdir=$libdir
+  eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \
+       LDFLAGS=\"\$LDFLAGS $_LT_TAGVAR(hardcode_libdir_flag_spec, $1)\""
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+    [AS_IF([ ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null],
+       [shlibpath_overrides_runpath=yes])])
+  LDFLAGS=$save_LDFLAGS
+  libdir=$save_libdir
+
+  # This implies no fast_install, which is unacceptable.
+  # Some rework will be needed to allow for fast_install
+  # before this can be enabled.
+  hardcode_into_libs=yes
+
+  # Append ld.so.conf contents to the search path
+  if test -f /etc/ld.so.conf; then
+    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s 2>/dev/null", \[$]2)); skip = 1; } { if (!skip) print \[$]0; skip = 0; }' < /etc/ld.so.conf | $SED -e 's/#.*//;/^[	 ]*hwcap[	 ]/d;s/[:,	]/ /g;s/=[^=]*$//;s/=[^= ]* / /g;/^$/d' | tr '\n' ' '`
+    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  fi
+
+  # We used to test for /lib/ld.so.1 and disable shared libraries on
+  # powerpc, because MkLinux only supported shared libraries with the
+  # GNU dynamic linker.  Since this was broken with cross compilers,
+  # most powerpc-linux boxes support dynamic linking these days and
+  # people can always --disable-shared, the test was removed, and we
+  # assume the GNU/Linux dynamic linker is in use.
+  dynamic_linker='GNU/Linux ld.so'
+  ;;
+
+netbsdelf*-gnu)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='NetBSD ld.elf_so'
+  ;;
+
+netbsd*)
+  version_type=sunos
+  need_lib_prefix=no
+  need_version=no
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+    finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+    dynamic_linker='NetBSD (a.out) ld.so'
+  else
+    library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
+    soname_spec='${libname}${release}${shared_ext}$major'
+    dynamic_linker='NetBSD ld.elf_so'
+  fi
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  ;;
+
+newsos6)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  ;;
+
+*nto* | *qnx*)
+  version_type=qnx
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='ldqnx.so'
+  ;;
+
+openbsd*)
+  version_type=sunos
+  sys_lib_dlsearch_path_spec="/usr/lib"
+  need_lib_prefix=no
+  # Some older versions of OpenBSD (3.3 at least) *do* need versioned libs.
+  case $host_os in
+    openbsd3.3 | openbsd3.3.*)	need_version=yes ;;
+    *)				need_version=no  ;;
+  esac
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+  finish_cmds='PATH="\$PATH:/sbin" ldconfig -m $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+    case $host_os in
+      openbsd2.[[89]] | openbsd2.[[89]].*)
+	shlibpath_overrides_runpath=no
+	;;
+      *)
+	shlibpath_overrides_runpath=yes
+	;;
+      esac
+  else
+    shlibpath_overrides_runpath=yes
+  fi
+  ;;
+
+os2*)
+  libname_spec='$name'
+  shrext_cmds=".dll"
+  need_lib_prefix=no
+  library_names_spec='$libname${shared_ext} $libname.a'
+  dynamic_linker='OS/2 ld.exe'
+  shlibpath_var=LIBPATH
+  ;;
+
+osf3* | osf4* | osf5*)
+  version_type=osf
+  need_lib_prefix=no
+  need_version=no
+  soname_spec='${libname}${release}${shared_ext}$major'
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
+  sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec"
+  ;;
+
+rdos*)
+  dynamic_linker=no
+  ;;
+
+solaris*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  # ldd complains unless libraries are executable
+  postinstall_cmds='chmod +x $lib'
+  ;;
+
+sunos4*)
+  version_type=sunos
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${shared_ext}$versuffix'
+  finish_cmds='PATH="\$PATH:/usr/etc" ldconfig $libdir'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  if test "$with_gnu_ld" = yes; then
+    need_lib_prefix=no
+  fi
+  need_version=yes
+  ;;
+
+sysv4 | sysv4.3*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  case $host_vendor in
+    sni)
+      shlibpath_overrides_runpath=no
+      need_lib_prefix=no
+      runpath_var=LD_RUN_PATH
+      ;;
+    siemens)
+      need_lib_prefix=no
+      ;;
+    motorola)
+      need_lib_prefix=no
+      need_version=no
+      shlibpath_overrides_runpath=no
+      sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
+      ;;
+  esac
+  ;;
+
+sysv4*MP*)
+  if test -d /usr/nec ;then
+    version_type=linux
+    library_names_spec='$libname${shared_ext}.$versuffix $libname${shared_ext}.$major $libname${shared_ext}'
+    soname_spec='$libname${shared_ext}.$major'
+    shlibpath_var=LD_LIBRARY_PATH
+  fi
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  version_type=freebsd-elf
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=yes
+  hardcode_into_libs=yes
+  if test "$with_gnu_ld" = yes; then
+    sys_lib_search_path_spec='/usr/local/lib /usr/gnu/lib /usr/ccs/lib /usr/lib /lib'
+  else
+    sys_lib_search_path_spec='/usr/ccs/lib /usr/lib'
+    case $host_os in
+      sco3.2v5*)
+        sys_lib_search_path_spec="$sys_lib_search_path_spec /lib"
+	;;
+    esac
+  fi
+  sys_lib_dlsearch_path_spec='/usr/lib'
+  ;;
+
+tpf*)
+  # TPF is a cross-target only.  Preferred cross-host = GNU/Linux.
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  ;;
+
+uts4*)
+  version_type=linux
+  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major $libname${shared_ext}'
+  soname_spec='${libname}${release}${shared_ext}$major'
+  shlibpath_var=LD_LIBRARY_PATH
+  ;;
+
+*)
+  dynamic_linker=no
+  ;;
+esac
+AC_MSG_RESULT([$dynamic_linker])
+test "$dynamic_linker" = no && can_build_shared=no
+
+variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
+if test "$GCC" = yes; then
+  variables_saved_for_relink="$variables_saved_for_relink GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH"
+fi
+
+if test "${lt_cv_sys_lib_search_path_spec+set}" = set; then
+  sys_lib_search_path_spec="$lt_cv_sys_lib_search_path_spec"
+fi
+if test "${lt_cv_sys_lib_dlsearch_path_spec+set}" = set; then
+  sys_lib_dlsearch_path_spec="$lt_cv_sys_lib_dlsearch_path_spec"
+fi
+
+_LT_DECL([], [variables_saved_for_relink], [1],
+    [Variables whose values should be saved in libtool wrapper scripts and
+    restored at link time])
+_LT_DECL([], [need_lib_prefix], [0],
+    [Do we need the "lib" prefix for modules?])
+_LT_DECL([], [need_version], [0], [Do we need a version for libraries?])
+_LT_DECL([], [version_type], [0], [Library versioning type])
+_LT_DECL([], [runpath_var], [0],  [Shared library runtime path variable])
+_LT_DECL([], [shlibpath_var], [0],[Shared library path variable])
+_LT_DECL([], [shlibpath_overrides_runpath], [0],
+    [Is shlibpath searched before the hard-coded library search path?])
+_LT_DECL([], [libname_spec], [1], [Format of library name prefix])
+_LT_DECL([], [library_names_spec], [1],
+    [[List of archive names.  First name is the real one, the rest are links.
+    The last name is the one that the linker finds with -lNAME]])
+_LT_DECL([], [soname_spec], [1],
+    [[The coded name of the library, if different from the real name]])
+_LT_DECL([], [postinstall_cmds], [2],
+    [Command to use after installation of a shared archive])
+_LT_DECL([], [postuninstall_cmds], [2],
+    [Command to use after uninstallation of a shared archive])
+_LT_DECL([], [finish_cmds], [2],
+    [Commands used to finish a libtool library installation in a directory])
+_LT_DECL([], [finish_eval], [1],
+    [[As "finish_cmds", except a single script fragment to be evaled but
+    not shown]])
+_LT_DECL([], [hardcode_into_libs], [0],
+    [Whether we should hardcode library paths into libraries])
+_LT_DECL([], [sys_lib_search_path_spec], [2],
+    [Compile-time system search path for libraries])
+_LT_DECL([], [sys_lib_dlsearch_path_spec], [2],
+    [Run-time system search path for libraries])
+])# _LT_SYS_DYNAMIC_LINKER
+
+
+# _LT_PATH_TOOL_PREFIX(TOOL)
+# --------------------------
+# find a file program which can recognize shared library
+AC_DEFUN([_LT_PATH_TOOL_PREFIX],
+[m4_require([_LT_DECL_EGREP])dnl
+AC_MSG_CHECKING([for $1])
+AC_CACHE_VAL(lt_cv_path_MAGIC_CMD,
+[case $MAGIC_CMD in
+[[\\/*] |  ?:[\\/]*])
+  lt_cv_path_MAGIC_CMD="$MAGIC_CMD" # Let the user override the test with a path.
+  ;;
+*)
+  lt_save_MAGIC_CMD="$MAGIC_CMD"
+  lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+dnl $ac_dummy forces splitting on constant user-supplied paths.
+dnl POSIX.2 word splitting is done only on the output of word expansions,
+dnl not every word.  This closes a longstanding sh security hole.
+  ac_dummy="m4_if([$2], , $PATH, [$2])"
+  for ac_dir in $ac_dummy; do
+    IFS="$lt_save_ifs"
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$1; then
+      lt_cv_path_MAGIC_CMD="$ac_dir/$1"
+      if test -n "$file_magic_test_file"; then
+	case $deplibs_check_method in
+	"file_magic "*)
+	  file_magic_regex=`expr "$deplibs_check_method" : "file_magic \(.*\)"`
+	  MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+	  if eval $file_magic_cmd \$file_magic_test_file 2> /dev/null |
+	    $EGREP "$file_magic_regex" > /dev/null; then
+	    :
+	  else
+	    cat <<_LT_EOF 1>&2
+
+*** Warning: the command libtool uses to detect shared libraries,
+*** $file_magic_cmd, produces output that libtool cannot recognize.
+*** The result is that libtool may fail to recognize shared libraries
+*** as such.  This will affect the creation of libtool libraries that
+*** depend on shared libraries, but programs linked with such libtool
+*** libraries will work regardless of this problem.  Nevertheless, you
+*** may want to report the problem to your system manager and/or to
+*** bug-libtool@gnu.org
+
+_LT_EOF
+	  fi ;;
+	esac
+      fi
+      break
+    fi
+  done
+  IFS="$lt_save_ifs"
+  MAGIC_CMD="$lt_save_MAGIC_CMD"
+  ;;
+esac])
+MAGIC_CMD="$lt_cv_path_MAGIC_CMD"
+if test -n "$MAGIC_CMD"; then
+  AC_MSG_RESULT($MAGIC_CMD)
+else
+  AC_MSG_RESULT(no)
+fi
+_LT_DECL([], [MAGIC_CMD], [0],
+	 [Used to examine libraries when file_magic_cmd begins with "file"])dnl
+])# _LT_PATH_TOOL_PREFIX
+
+# Old name:
+AU_ALIAS([AC_PATH_TOOL_PREFIX], [_LT_PATH_TOOL_PREFIX])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_PATH_TOOL_PREFIX], [])
+
+
+# _LT_PATH_MAGIC
+# --------------
+# find a file program which can recognize a shared library
+m4_defun([_LT_PATH_MAGIC],
+[_LT_PATH_TOOL_PREFIX(${ac_tool_prefix}file, /usr/bin$PATH_SEPARATOR$PATH)
+if test -z "$lt_cv_path_MAGIC_CMD"; then
+  if test -n "$ac_tool_prefix"; then
+    _LT_PATH_TOOL_PREFIX(file, /usr/bin$PATH_SEPARATOR$PATH)
+  else
+    MAGIC_CMD=:
+  fi
+fi
+])# _LT_PATH_MAGIC
+
+
+# LT_PATH_LD
+# ----------
+# find the pathname to the GNU or non-GNU linker
+AC_DEFUN([LT_PATH_LD],
+[AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_DECL_EGREP])dnl
+
+AC_ARG_WITH([gnu-ld],
+    [AS_HELP_STRING([--with-gnu-ld],
+	[assume the C compiler uses GNU ld @<:@default=no@:>@])],
+    [test "$withval" = no || with_gnu_ld=yes],
+    [with_gnu_ld=no])dnl
+
+ac_prog=ld
+if test "$GCC" = yes; then
+  # Check if gcc -print-prog-name=ld gives a path.
+  AC_MSG_CHECKING([for ld used by $CC])
+  case $host in
+  *-*-mingw*)
+    # gcc leaves a trailing carriage return which upsets mingw
+    ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
+  *)
+    ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
+  esac
+  case $ac_prog in
+    # Accept absolute paths.
+    [[\\/]]* | ?:[[\\/]]*)
+      re_direlt='/[[^/]][[^/]]*/\.\./'
+      # Canonicalize the pathname of ld
+      ac_prog=`$ECHO "$ac_prog"| $SED 's%\\\\%/%g'`
+      while $ECHO "$ac_prog" | $GREP "$re_direlt" > /dev/null 2>&1; do
+	ac_prog=`$ECHO $ac_prog| $SED "s%$re_direlt%/%"`
+      done
+      test -z "$LD" && LD="$ac_prog"
+      ;;
+  "")
+    # If it fails, then pretend we aren't using GCC.
+    ac_prog=ld
+    ;;
+  *)
+    # If it is relative, then search for the first ld in PATH.
+    with_gnu_ld=unknown
+    ;;
+  esac
+elif test "$with_gnu_ld" = yes; then
+  AC_MSG_CHECKING([for GNU ld])
+else
+  AC_MSG_CHECKING([for non-GNU ld])
+fi
+AC_CACHE_VAL(lt_cv_path_LD,
+[if test -z "$LD"; then
+  lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+  for ac_dir in $PATH; do
+    IFS="$lt_save_ifs"
+    test -z "$ac_dir" && ac_dir=.
+    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
+      lt_cv_path_LD="$ac_dir/$ac_prog"
+      # Check to see if the program is GNU ld.  I'd rather use --version,
+      # but apparently some variants of GNU ld only accept -v.
+      # Break only if it was the GNU/non-GNU ld that we prefer.
+      case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
+      *GNU* | *'with BFD'*)
+	test "$with_gnu_ld" != no && break
+	;;
+      *)
+	test "$with_gnu_ld" != yes && break
+	;;
+      esac
+    fi
+  done
+  IFS="$lt_save_ifs"
+else
+  lt_cv_path_LD="$LD" # Let the user override the test with a path.
+fi])
+LD="$lt_cv_path_LD"
+if test -n "$LD"; then
+  AC_MSG_RESULT($LD)
+else
+  AC_MSG_RESULT(no)
+fi
+test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
+_LT_PATH_LD_GNU
+AC_SUBST([LD])
+
+_LT_TAGDECL([], [LD], [1], [The linker used to build libraries])
+])# LT_PATH_LD
+
+# Old names:
+AU_ALIAS([AM_PROG_LD], [LT_PATH_LD])
+AU_ALIAS([AC_PROG_LD], [LT_PATH_LD])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_PROG_LD], [])
+dnl AC_DEFUN([AC_PROG_LD], [])
+
+
+# _LT_PATH_LD_GNU
+#- --------------
+m4_defun([_LT_PATH_LD_GNU],
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], lt_cv_prog_gnu_ld,
+[# I'd rather use --version here, but apparently some GNU lds only accept -v.
+case `$LD -v 2>&1 </dev/null` in
+*GNU* | *'with BFD'*)
+  lt_cv_prog_gnu_ld=yes
+  ;;
+*)
+  lt_cv_prog_gnu_ld=no
+  ;;
+esac])
+with_gnu_ld=$lt_cv_prog_gnu_ld
+])# _LT_PATH_LD_GNU
+
+
+# _LT_CMD_RELOAD
+# --------------
+# find reload flag for linker
+#   -- PORTME Some linkers may need a different reload flag.
+m4_defun([_LT_CMD_RELOAD],
+[AC_CACHE_CHECK([for $LD option to reload object files],
+  lt_cv_ld_reload_flag,
+  [lt_cv_ld_reload_flag='-r'])
+reload_flag=$lt_cv_ld_reload_flag
+case $reload_flag in
+"" | " "*) ;;
+*) reload_flag=" $reload_flag" ;;
+esac
+reload_cmds='$LD$reload_flag -o $output$reload_objs'
+case $host_os in
+  darwin*)
+    if test "$GCC" = yes; then
+      reload_cmds='$LTCC $LTCFLAGS -nostdlib ${wl}-r -o $output$reload_objs'
+    else
+      reload_cmds='$LD$reload_flag -o $output$reload_objs'
+    fi
+    ;;
+esac
+_LT_DECL([], [reload_flag], [1], [How to create reloadable object files])dnl
+_LT_DECL([], [reload_cmds], [2])dnl
+])# _LT_CMD_RELOAD
+
+
+# _LT_CHECK_MAGIC_METHOD
+# ----------------------
+# how to check for library dependencies
+#  -- PORTME fill in with the dynamic library characteristics
+m4_defun([_LT_CHECK_MAGIC_METHOD],
+[m4_require([_LT_DECL_EGREP])
+m4_require([_LT_DECL_OBJDUMP])
+AC_CACHE_CHECK([how to recognize dependent libraries],
+lt_cv_deplibs_check_method,
+[lt_cv_file_magic_cmd='$MAGIC_CMD'
+lt_cv_file_magic_test_file=
+lt_cv_deplibs_check_method='unknown'
+# Need to set the preceding variable on all platforms that support
+# interlibrary dependencies.
+# 'none' -- dependencies not supported.
+# `unknown' -- same as none, but documents that we really don't know.
+# 'pass_all' -- all dependencies passed with no checks.
+# 'test_compile' -- check by making test program.
+# 'file_magic [[regex]]' -- check by looking for files in library path
+# which responds to the $file_magic_cmd with a given extended regex.
+# If you have `file' or equivalent on your system and you're not sure
+# whether `pass_all' will *always* work, you probably want this one.
+
+case $host_os in
+aix[[4-9]]*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+beos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+bsdi[[45]]*)
+  lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib)'
+  lt_cv_file_magic_cmd='/usr/bin/file -L'
+  lt_cv_file_magic_test_file=/shlib/libc.so
+  ;;
+
+cygwin*)
+  # func_win32_libid is a shell function defined in ltmain.sh
+  lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+  lt_cv_file_magic_cmd='func_win32_libid'
+  ;;
+
+mingw* | pw32*)
+  # Base MSYS/MinGW do not provide the 'file' command needed by
+  # func_win32_libid shell function, so use a weaker test based on 'objdump',
+  # unless we find 'file', for example because we are cross-compiling.
+  if ( file / ) >/dev/null 2>&1; then
+    lt_cv_deplibs_check_method='file_magic ^x86 archive import|^x86 DLL'
+    lt_cv_file_magic_cmd='func_win32_libid'
+  else
+    lt_cv_deplibs_check_method='file_magic file format pei*-i386(.*architecture: i386)?'
+    lt_cv_file_magic_cmd='$OBJDUMP -f'
+  fi
+  ;;
+
+cegcc)
+  # use the weaker test based on 'objdump'. See mingw*.
+  lt_cv_deplibs_check_method='file_magic file format pe-arm-.*little(.*architecture: arm)?'
+  lt_cv_file_magic_cmd='$OBJDUMP -f'
+  ;;
+
+darwin* | rhapsody*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+freebsd* | dragonfly*)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    case $host_cpu in
+    i*86 )
+      # Not sure whether the presence of OpenBSD here was a mistake.
+      # Let's accept both of them until this is cleared up.
+      lt_cv_deplibs_check_method='file_magic (FreeBSD|OpenBSD|DragonFly)/i[[3-9]]86 (compact )?demand paged shared library'
+      lt_cv_file_magic_cmd=/usr/bin/file
+      lt_cv_file_magic_test_file=`echo /usr/lib/libc.so.*`
+      ;;
+    esac
+  else
+    lt_cv_deplibs_check_method=pass_all
+  fi
+  ;;
+
+gnu*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+hpux10.20* | hpux11*)
+  lt_cv_file_magic_cmd=/usr/bin/file
+  case $host_cpu in
+  ia64*)
+    lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|ELF-[[0-9]][[0-9]]) shared object file - IA64'
+    lt_cv_file_magic_test_file=/usr/lib/hpux32/libc.so
+    ;;
+  hppa*64*)
+    [lt_cv_deplibs_check_method='file_magic (s[0-9][0-9][0-9]|ELF-[0-9][0-9]) shared object file - PA-RISC [0-9].[0-9]']
+    lt_cv_file_magic_test_file=/usr/lib/pa20_64/libc.sl
+    ;;
+  *)
+    lt_cv_deplibs_check_method='file_magic (s[[0-9]][[0-9]][[0-9]]|PA-RISC[[0-9]].[[0-9]]) shared library'
+    lt_cv_file_magic_test_file=/usr/lib/libc.sl
+    ;;
+  esac
+  ;;
+
+interix[[3-9]]*)
+  # PIC code is broken on Interix 3.x, that's why |\.a not |_pic\.a here
+  lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|\.a)$'
+  ;;
+
+irix5* | irix6* | nonstopux*)
+  case $LD in
+  *-32|*"-32 ") libmagic=32-bit;;
+  *-n32|*"-n32 ") libmagic=N32;;
+  *-64|*"-64 ") libmagic=64-bit;;
+  *) libmagic=never-match;;
+  esac
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+# This must be Linux ELF.
+linux* | k*bsd*-gnu | kopensolaris*-gnu)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+netbsd* | netbsdelf*-gnu)
+  if echo __ELF__ | $CC -E - | $GREP __ELF__ > /dev/null; then
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so|_pic\.a)$'
+  fi
+  ;;
+
+newos6*)
+  lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (executable|dynamic lib)'
+  lt_cv_file_magic_cmd=/usr/bin/file
+  lt_cv_file_magic_test_file=/usr/lib/libnls.so
+  ;;
+
+*nto* | *qnx*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+openbsd*)
+  if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|\.so|_pic\.a)$'
+  else
+    lt_cv_deplibs_check_method='match_pattern /lib[[^/]]+(\.so\.[[0-9]]+\.[[0-9]]+|_pic\.a)$'
+  fi
+  ;;
+
+osf3* | osf4* | osf5*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+rdos*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+solaris*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+
+sysv4 | sysv4.3*)
+  case $host_vendor in
+  motorola)
+    lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[ML]]SB (shared object|dynamic lib) M[[0-9]][[0-9]]* Version [[0-9]]'
+    lt_cv_file_magic_test_file=`echo /usr/lib/libc.so*`
+    ;;
+  ncr)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  sequent)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method='file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB (shared object|dynamic lib )'
+    ;;
+  sni)
+    lt_cv_file_magic_cmd='/bin/file'
+    lt_cv_deplibs_check_method="file_magic ELF [[0-9]][[0-9]]*-bit [[LM]]SB dynamic lib"
+    lt_cv_file_magic_test_file=/lib/libc.so
+    ;;
+  siemens)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  pc)
+    lt_cv_deplibs_check_method=pass_all
+    ;;
+  esac
+  ;;
+
+tpf*)
+  lt_cv_deplibs_check_method=pass_all
+  ;;
+esac
+])
+file_magic_cmd=$lt_cv_file_magic_cmd
+deplibs_check_method=$lt_cv_deplibs_check_method
+test -z "$deplibs_check_method" && deplibs_check_method=unknown
+
+_LT_DECL([], [deplibs_check_method], [1],
+    [Method to check whether dependent libraries are shared objects])
+_LT_DECL([], [file_magic_cmd], [1],
+    [Command to use when deplibs_check_method == "file_magic"])
+])# _LT_CHECK_MAGIC_METHOD
+
+
+# LT_PATH_NM
+# ----------
+# find the pathname to a BSD- or MS-compatible name lister
+AC_DEFUN([LT_PATH_NM],
+[AC_REQUIRE([AC_PROG_CC])dnl
+AC_CACHE_CHECK([for BSD- or MS-compatible name lister (nm)], lt_cv_path_NM,
+[if test -n "$NM"; then
+  # Let the user override the test.
+  lt_cv_path_NM="$NM"
+else
+  lt_nm_to_check="${ac_tool_prefix}nm"
+  if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
+    lt_nm_to_check="$lt_nm_to_check nm"
+  fi
+  for lt_tmp_nm in $lt_nm_to_check; do
+    lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
+    for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
+      IFS="$lt_save_ifs"
+      test -z "$ac_dir" && ac_dir=.
+      tmp_nm="$ac_dir/$lt_tmp_nm"
+      if test -f "$tmp_nm" || test -f "$tmp_nm$ac_exeext" ; then
+	# Check to see if the nm accepts a BSD-compat flag.
+	# Adding the `sed 1q' prevents false positives on HP-UX, which says:
+	#   nm: unknown option "B" ignored
+	# Tru64's nm complains that /dev/null is an invalid object file
+	case `"$tmp_nm" -B /dev/null 2>&1 | sed '1q'` in
+	*/dev/null* | *'Invalid file or object type'*)
+	  lt_cv_path_NM="$tmp_nm -B"
+	  break
+	  ;;
+	*)
+	  case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in
+	  */dev/null*)
+	    lt_cv_path_NM="$tmp_nm -p"
+	    break
+	    ;;
+	  *)
+	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
+	    continue # so that we can try to find one that supports BSD flags
+	    ;;
+	  esac
+	  ;;
+	esac
+      fi
+    done
+    IFS="$lt_save_ifs"
+  done
+  : ${lt_cv_path_NM=no}
+fi])
+if test "$lt_cv_path_NM" != "no"; then
+  NM="$lt_cv_path_NM"
+else
+  # Didn't find any BSD compatible name lister, look for dumpbin.
+  AC_CHECK_TOOLS(DUMPBIN, ["dumpbin -symbols" "link -dump -symbols"], :)
+  AC_SUBST([DUMPBIN])
+  if test "$DUMPBIN" != ":"; then
+    NM="$DUMPBIN"
+  fi
+fi
+test -z "$NM" && NM=nm
+AC_SUBST([NM])
+_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl
+
+AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface],
+  [lt_cv_nm_interface="BSD nm"
+  echo "int some_variable = 0;" > conftest.$ac_ext
+  (eval echo "\"\$as_me:__oline__: $ac_compile\"" >&AS_MESSAGE_LOG_FD)
+  (eval "$ac_compile" 2>conftest.err)
+  cat conftest.err >&AS_MESSAGE_LOG_FD
+  (eval echo "\"\$as_me:__oline__: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD)
+  (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
+  cat conftest.err >&AS_MESSAGE_LOG_FD
+  (eval echo "\"\$as_me:__oline__: output\"" >&AS_MESSAGE_LOG_FD)
+  cat conftest.out >&AS_MESSAGE_LOG_FD
+  if $GREP 'External.*some_variable' conftest.out > /dev/null; then
+    lt_cv_nm_interface="MS dumpbin"
+  fi
+  rm -f conftest*])
+])# LT_PATH_NM
+
+# Old names:
+AU_ALIAS([AM_PROG_NM], [LT_PATH_NM])
+AU_ALIAS([AC_PROG_NM], [LT_PATH_NM])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_PROG_NM], [])
+dnl AC_DEFUN([AC_PROG_NM], [])
+
+
+# LT_LIB_M
+# --------
+# check for math library
+AC_DEFUN([LT_LIB_M],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+LIBM=
+case $host in
+*-*-beos* | *-*-cygwin* | *-*-pw32* | *-*-darwin*)
+  # These system don't have libm, or don't need it
+  ;;
+*-ncr-sysv4.3*)
+  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
+  AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm")
+  ;;
+*)
+  AC_CHECK_LIB(m, cos, LIBM="-lm")
+  ;;
+esac
+AC_SUBST([LIBM])
+])# LT_LIB_M
+
+# Old name:
+AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_CHECK_LIBM], [])
+
+
+# _LT_COMPILER_NO_RTTI([TAGNAME])
+# -------------------------------
+m4_defun([_LT_COMPILER_NO_RTTI],
+[m4_require([_LT_TAG_COMPILER])dnl
+
+_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=
+
+if test "$GCC" = yes; then
+  _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin'
+
+  _LT_COMPILER_OPTION([if $compiler supports -fno-rtti -fno-exceptions],
+    lt_cv_prog_compiler_rtti_exceptions,
+    [-fno-rtti -fno-exceptions], [],
+    [_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)="$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1) -fno-rtti -fno-exceptions"])
+fi
+_LT_TAGDECL([no_builtin_flag], [lt_prog_compiler_no_builtin_flag], [1],
+	[Compiler flag to turn off builtin functions])
+])# _LT_COMPILER_NO_RTTI
+
+
+# _LT_CMD_GLOBAL_SYMBOLS
+# ----------------------
+m4_defun([_LT_CMD_GLOBAL_SYMBOLS],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_PROG_CC])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+AC_REQUIRE([LT_PATH_LD])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+AC_MSG_CHECKING([command to parse $NM output from $compiler object])
+AC_CACHE_VAL([lt_cv_sys_global_symbol_pipe],
+[
+# These are sane defaults that work on at least a few old systems.
+# [They come from Ultrix.  What could be older than Ultrix?!! ;)]
+
+# Character class describing NM global symbol codes.
+symcode='[[BCDEGRST]]'
+
+# Regexp to match symbols that can be accessed directly from C.
+sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)'
+
+# Define system-specific variables.
+case $host_os in
+aix*)
+  symcode='[[BCDT]]'
+  ;;
+cygwin* | mingw* | pw32* | cegcc*)
+  symcode='[[ABCDGISTW]]'
+  ;;
+hpux*)
+  if test "$host_cpu" = ia64; then
+    symcode='[[ABCDEGRST]]'
+  fi
+  ;;
+irix* | nonstopux*)
+  symcode='[[BCDEGRST]]'
+  ;;
+osf*)
+  symcode='[[BCDEGQRST]]'
+  ;;
+solaris*)
+  symcode='[[BDRT]]'
+  ;;
+sco3.2v5*)
+  symcode='[[DT]]'
+  ;;
+sysv4.2uw2*)
+  symcode='[[DT]]'
+  ;;
+sysv5* | sco5v6* | unixware* | OpenUNIX*)
+  symcode='[[ABDT]]'
+  ;;
+sysv4)
+  symcode='[[DFNSTU]]'
+  ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+case `$NM -V 2>&1` in
+*GNU* | *'with BFD'*)
+  symcode='[[ABCDGIRSTW]]' ;;
+esac
+
+# Transform an extracted symbol line into a proper C declaration.
+# Some systems (esp. on ia64) link data and code symbols differently,
+# so use this general approach.
+lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'"
+
+# Transform an extracted symbol line into symbol name and symbol address
+lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([[^ ]]*\) $/  {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/  {\"\2\", (void *) \&\2},/p'"
+lt_cv_sys_global_symbol_to_c_name_address_lib_prefix="sed -n -e 's/^: \([[^ ]]*\) $/  {\\\"\1\\\", (void *) 0},/p' -e 's/^$symcode* \([[^ ]]*\) \(lib[[^ ]]*\)$/  {\"\2\", (void *) \&\2},/p' -e 's/^$symcode* \([[^ ]]*\) \([[^ ]]*\)$/  {\"lib\2\", (void *) \&\2},/p'"
+
+# Handle CRLF in mingw tool chain
+opt_cr=
+case $build_os in
+mingw*)
+  opt_cr=`$ECHO 'x\{0,1\}' | tr x '\015'` # option cr in regexp
+  ;;
+esac
+
+# Try without a prefix underscore, then with it.
+for ac_symprfx in "" "_"; do
+
+  # Transform symcode, sympat, and symprfx into a raw symbol and a C symbol.
+  symxfrm="\\1 $ac_symprfx\\2 \\2"
+
+  # Write the raw and C identifiers.
+  if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+    # Fake it for dumpbin and say T for any non-static function
+    # and D for any global variable.
+    # Also find C++ and __fastcall symbols from MSVC++,
+    # which start with @ or ?.
+    lt_cv_sys_global_symbol_pipe="$AWK ['"\
+"     {last_section=section; section=\$ 3};"\
+"     /Section length .*#relocs.*(pick any)/{hide[last_section]=1};"\
+"     \$ 0!~/External *\|/{next};"\
+"     / 0+ UNDEF /{next}; / UNDEF \([^|]\)*()/{next};"\
+"     {if(hide[section]) next};"\
+"     {f=0}; \$ 0~/\(\).*\|/{f=1}; {printf f ? \"T \" : \"D \"};"\
+"     {split(\$ 0, a, /\||\r/); split(a[2], s)};"\
+"     s[1]~/^[@?]/{print s[1], s[1]; next};"\
+"     s[1]~prfx {split(s[1],t,\"@\"); print t[1], substr(t[1],length(prfx))}"\
+"     ' prfx=^$ac_symprfx]"
+  else
+    lt_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[[	 ]]\($symcode$symcode*\)[[	 ]][[	 ]]*$ac_symprfx$sympat$opt_cr$/$symxfrm/p'"
+  fi
+
+  # Check to see that the pipe works correctly.
+  pipe_works=no
+
+  rm -f conftest*
+  cat > conftest.$ac_ext <<_LT_EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(void);
+void nm_test_func(void){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func();return(0);}
+_LT_EOF
+
+  if AC_TRY_EVAL(ac_compile); then
+    # Now try to grab the symbols.
+    nlist=conftest.nm
+    if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $nlist) && test -s "$nlist"; then
+      # Try sorting and uniquifying the output.
+      if sort "$nlist" | uniq > "$nlist"T; then
+	mv -f "$nlist"T "$nlist"
+      else
+	rm -f "$nlist"T
+      fi
+
+      # Make sure that we snagged all the symbols we need.
+      if $GREP ' nm_test_var$' "$nlist" >/dev/null; then
+	if $GREP ' nm_test_func$' "$nlist" >/dev/null; then
+	  cat <<_LT_EOF > conftest.$ac_ext
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LT_EOF
+	  # Now generate the symbol file.
+	  eval "$lt_cv_sys_global_symbol_to_cdecl"' < "$nlist" | $GREP -v main >> conftest.$ac_ext'
+
+	  cat <<_LT_EOF >> conftest.$ac_ext
+
+/* The mapping between symbol names and symbols.  */
+const struct {
+  const char *name;
+  void       *address;
+}
+lt__PROGRAM__LTX_preloaded_symbols[[]] =
+{
+  { "@PROGRAM@", (void *) 0 },
+_LT_EOF
+	  $SED "s/^$symcode$symcode* \(.*\) \(.*\)$/  {\"\2\", (void *) \&\2},/" < "$nlist" | $GREP -v main >> conftest.$ac_ext
+	  cat <<\_LT_EOF >> conftest.$ac_ext
+  {0, (void *) 0}
+};
+
+/* This works around a problem in FreeBSD linker */
+#ifdef FREEBSD_WORKAROUND
+static const void *lt_preloaded_setup() {
+  return lt__PROGRAM__LTX_preloaded_symbols;
+}
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+_LT_EOF
+	  # Now try linking the two files.
+	  mv conftest.$ac_objext conftstm.$ac_objext
+	  lt_save_LIBS="$LIBS"
+	  lt_save_CFLAGS="$CFLAGS"
+	  LIBS="conftstm.$ac_objext"
+	  CFLAGS="$CFLAGS$_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)"
+	  if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext}; then
+	    pipe_works=yes
+	  fi
+	  LIBS="$lt_save_LIBS"
+	  CFLAGS="$lt_save_CFLAGS"
+	else
+	  echo "cannot find nm_test_func in $nlist" >&AS_MESSAGE_LOG_FD
+	fi
+      else
+	echo "cannot find nm_test_var in $nlist" >&AS_MESSAGE_LOG_FD
+      fi
+    else
+      echo "cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
+    fi
+  else
+    echo "$progname: failed program was:" >&AS_MESSAGE_LOG_FD
+    cat conftest.$ac_ext >&5
+  fi
+  rm -rf conftest* conftst*
+
+  # Do not use the global_symbol_pipe unless it works.
+  if test "$pipe_works" = yes; then
+    break
+  else
+    lt_cv_sys_global_symbol_pipe=
+  fi
+done
+])
+if test -z "$lt_cv_sys_global_symbol_pipe"; then
+  lt_cv_sys_global_symbol_to_cdecl=
+fi
+if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
+  AC_MSG_RESULT(failed)
+else
+  AC_MSG_RESULT(ok)
+fi
+
+_LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1],
+    [Take the output of nm and produce a listing of raw symbols and C names])
+_LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1],
+    [Transform the output of nm in a proper C declaration])
+_LT_DECL([global_symbol_to_c_name_address],
+    [lt_cv_sys_global_symbol_to_c_name_address], [1],
+    [Transform the output of nm in a C name address pair])
+_LT_DECL([global_symbol_to_c_name_address_lib_prefix],
+    [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1],
+    [Transform the output of nm in a C name address pair when lib prefix is needed])
+]) # _LT_CMD_GLOBAL_SYMBOLS
+
+
+# _LT_COMPILER_PIC([TAGNAME])
+# ---------------------------
+m4_defun([_LT_COMPILER_PIC],
+[m4_require([_LT_TAG_COMPILER])dnl
+_LT_TAGVAR(lt_prog_compiler_wl, $1)=
+_LT_TAGVAR(lt_prog_compiler_pic, $1)=
+_LT_TAGVAR(lt_prog_compiler_static, $1)=
+
+AC_MSG_CHECKING([for $compiler option to produce PIC])
+m4_if([$1], [CXX], [
+  # C++ specific cases for pic, static, wl, etc.
+  if test "$GXX" = yes; then
+    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+
+    case $host_os in
+    aix*)
+      # All AIX code is PIC.
+      if test "$host_cpu" = ia64; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the `-m68020' flag to GCC prevents building anything better,
+            # like `-m68040'.
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+    mingw* | cygwin* | os2* | pw32* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      ;;
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common'
+      ;;
+    *djgpp*)
+      # DJGPP does not support shared libraries at all
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+      ;;
+    interix[[3-9]]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic
+      fi
+      ;;
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	;;
+      esac
+      ;;
+    *qnx* | *nto*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+    *)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+    esac
+  else
+    case $host_os in
+      aix[[4-9]]*)
+	# All AIX code is PIC.
+	if test "$host_cpu" = ia64; then
+	  # AIX 5 now supports IA64 processor
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	else
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp'
+	fi
+	;;
+      chorus*)
+	case $cc_basename in
+	cxch68*)
+	  # Green Hills C++ Compiler
+	  # _LT_TAGVAR(lt_prog_compiler_static, $1)="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a"
+	  ;;
+	esac
+	;;
+      dgux*)
+	case $cc_basename in
+	  ec++*)
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    ;;
+	  ghcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      freebsd* | dragonfly*)
+	# FreeBSD uses GNU C++
+	;;
+      hpux9* | hpux10* | hpux11*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive'
+	    if test "$host_cpu" != ia64; then
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	    fi
+	    ;;
+	  aCC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive'
+	    case $host_cpu in
+	    hppa*64*|ia64*)
+	      # +Z the default
+	      ;;
+	    *)
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	      ;;
+	    esac
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      interix*)
+	# This is c89, which is MS Visual C++ (no shared libs)
+	# Anyone wants to do a port?
+	;;
+      irix5* | irix6* | nonstopux*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    # CC pic flag -KPIC is the default.
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      linux* | k*bsd*-gnu | kopensolaris*-gnu)
+	case $cc_basename in
+	  KCC*)
+	    # KAI C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	    ;;
+	  ecpc* )
+	    # old Intel C++ for x86_64 which still supported -KPIC.
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	    ;;
+	  icpc* )
+	    # Intel C++, used to be incompatible with GCC.
+	    # ICC 10 doesn't accept -KPIC any more.
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+	    ;;
+	  pgCC* | pgcpp*)
+	    # Portland Group C++ compiler
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	  cxx*)
+	    # Compaq C++
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    ;;
+	  xlc* | xlC*)
+	    # IBM XL 8.0 on PPC
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink'
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+      lynxos*)
+	;;
+      m88k*)
+	;;
+      mvs*)
+	case $cc_basename in
+	  cxx*)
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-W c,exportall'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      netbsd* | netbsdelf*-gnu)
+	;;
+      *qnx* | *nto*)
+        # QNX uses GNU C++, but need to define -shared option too, otherwise
+        # it will coredump.
+        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+        ;;
+      osf3* | osf4* | osf5*)
+	case $cc_basename in
+	  KCC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='--backend -Wl,'
+	    ;;
+	  RCC*)
+	    # Rational C++ 2.4.1
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  cxx*)
+	    # Digital/Compaq C++
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    # Make sure the PIC flag is empty.  It appears that all Alpha
+	    # Linux and Compaq Tru64 Unix objects are PIC.
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      psos*)
+	;;
+      solaris*)
+	case $cc_basename in
+	  CC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+	    ;;
+	  gcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sunos4*)
+	case $cc_basename in
+	  CC*)
+	    # Sun C++ 4.x
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	  lcc*)
+	    # Lucid
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+	case $cc_basename in
+	  CC*)
+	    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	    ;;
+	esac
+	;;
+      tandem*)
+	case $cc_basename in
+	  NCC*)
+	    # NonStop-UX NCC 3.20
+	    _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	    ;;
+	  *)
+	    ;;
+	esac
+	;;
+      vxworks*)
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+	;;
+    esac
+  fi
+],
+[
+  if test "$GCC" = yes; then
+    _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+    _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+
+    case $host_os in
+      aix*)
+      # All AIX code is PIC.
+      if test "$host_cpu" = ia64; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+        ;;
+      m68k)
+            # FIXME: we need at least 68020 code to build shared libraries, but
+            # adding the `-m68020' flag to GCC prevents building anything better,
+            # like `-m68040'.
+            _LT_TAGVAR(lt_prog_compiler_pic, $1)='-m68020 -resident32 -malways-restore-a4'
+        ;;
+      esac
+      ;;
+
+    beos* | irix5* | irix6* | nonstopux* | osf3* | osf4* | osf5*)
+      # PIC is the default for these OSes.
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      # Although the cygwin gcc ignores -fPIC, still need this for old-style
+      # (--disable-auto-import) libraries
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      ;;
+
+    darwin* | rhapsody*)
+      # PIC is the default on this platform
+      # Common symbols not allowed in MH_DYLIB files
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fno-common'
+      ;;
+
+    hpux*)
+      # PIC is the default for 64-bit PA HP-UX, but not for 32-bit
+      # PA HP-UX.  On IA64 HP-UX, PIC is the default but the pic flag
+      # sets the default TLS model and affects inlining.
+      case $host_cpu in
+      hppa*64*)
+	# +Z the default
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	;;
+      esac
+      ;;
+
+    interix[[3-9]]*)
+      # Interix 3.x gcc -fpic/-fPIC options generate broken code.
+      # Instead, we relocate shared libraries at runtime.
+      ;;
+
+    msdosdjgpp*)
+      # Just because we use GCC doesn't mean we suddenly get shared libraries
+      # on systems that don't support them.
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      enable_shared=no
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)=-Kconform_pic
+      fi
+      ;;
+
+    *)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+      ;;
+    esac
+  else
+    # PORTME Check for flag to pass linker flags through the system compiler.
+    case $host_os in
+    aix*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      if test "$host_cpu" = ia64; then
+	# AIX 5 now supports IA64 processor
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      else
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-bnso -bI:/lib/syscalls.exp'
+      fi
+      ;;
+
+    mingw* | cygwin* | pw32* | os2* | cegcc*)
+      # This hack is so that the source file can tell whether it is being
+      # built for inclusion in a dll (and should export symbols for example).
+      m4_if([$1], [GCJ], [],
+	[_LT_TAGVAR(lt_prog_compiler_pic, $1)='-DDLL_EXPORT'])
+      ;;
+
+    hpux9* | hpux10* | hpux11*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # PIC is the default for IA64 HP-UX and 64-bit HP-UX, but
+      # not for PA HP-UX.
+      case $host_cpu in
+      hppa*64*|ia64*)
+	# +Z the default
+	;;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='+Z'
+	;;
+      esac
+      # Is there a better lt_prog_compiler_static that works with the bundled CC?
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='${wl}-a ${wl}archive'
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # PIC (with -KPIC) is the default.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    linux* | k*bsd*-gnu | kopensolaris*-gnu)
+      case $cc_basename in
+      # old Intel for x86_64 which still supported -KPIC.
+      ecc*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+        ;;
+      # icc used to be incompatible with GCC.
+      # ICC 10 doesn't accept -KPIC any more.
+      icc* | ifort*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+        ;;
+      # Lahey Fortran 8.1.
+      lf95*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='--shared'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='--static'
+	;;
+      pgcc* | pgf77* | pgf90* | pgf95*)
+        # Portland Group compilers (*not* the Pentium gcc compiler,
+	# which looks to be a dead project)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fpic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+        ;;
+      ccc*)
+        _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+        # All Alpha code is PIC.
+        _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+        ;;
+      xl*)
+	# IBM XL C 8.0/Fortran 10.1 on PPC
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-qpic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-qstaticlink'
+	;;
+      *)
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)
+	  # Sun C 5.9
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+	  ;;
+	*Sun\ F*)
+	  # Sun Fortran 8.3 passes all unrecognized flags to the linker
+	  _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+	  _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+	  _LT_TAGVAR(lt_prog_compiler_wl, $1)=''
+	  ;;
+	esac
+	;;
+      esac
+      ;;
+
+    newsos6)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    *nto* | *qnx*)
+      # QNX uses GNU C++, but need to define -shared option too, otherwise
+      # it will coredump.
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC -shared'
+      ;;
+
+    osf3* | osf4* | osf5*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      # All OSF/1 code is PIC.
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    rdos*)
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-non_shared'
+      ;;
+
+    solaris*)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      case $cc_basename in
+      f77* | f90* | f95*)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld ';;
+      *)
+	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,';;
+      esac
+      ;;
+
+    sunos4*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Qoption ld '
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    sysv4 | sysv4.2uw2* | sysv4.3*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec ;then
+	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-Kconform_pic'
+	_LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      fi
+      ;;
+
+    sysv5* | unixware* | sco3.2v5* | sco5v6* | OpenUNIX*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    unicos*)
+      _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      ;;
+
+    uts4*)
+      _LT_TAGVAR(lt_prog_compiler_pic, $1)='-pic'
+      _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
+      ;;
+
+    *)
+      _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no
+      ;;
+    esac
+  fi
+])
+case $host_os in
+  # For platforms which do not support PIC, -DPIC is meaningless:
+  *djgpp*)
+    _LT_TAGVAR(lt_prog_compiler_pic, $1)=
+    ;;
+  *)
+    _LT_TAGVAR(lt_prog_compiler_pic, $1)="$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])"
+    ;;
+esac
+AC_MSG_RESULT([$_LT_TAGVAR(lt_prog_compiler_pic, $1)])
+_LT_TAGDECL([wl], [lt_prog_compiler_wl], [1],
+	[How to pass a linker flag through the compiler])
+
+#
+# Check to make sure the PIC flag actually works.
+#
+if test -n "$_LT_TAGVAR(lt_prog_compiler_pic, $1)"; then
+  _LT_COMPILER_OPTION([if $compiler PIC flag $_LT_TAGVAR(lt_prog_compiler_pic, $1) works],
+    [_LT_TAGVAR(lt_cv_prog_compiler_pic_works, $1)],
+    [$_LT_TAGVAR(lt_prog_compiler_pic, $1)@&t@m4_if([$1],[],[ -DPIC],[m4_if([$1],[CXX],[ -DPIC],[])])], [],
+    [case $_LT_TAGVAR(lt_prog_compiler_pic, $1) in
+     "" | " "*) ;;
+     *) _LT_TAGVAR(lt_prog_compiler_pic, $1)=" $_LT_TAGVAR(lt_prog_compiler_pic, $1)" ;;
+     esac],
+    [_LT_TAGVAR(lt_prog_compiler_pic, $1)=
+     _LT_TAGVAR(lt_prog_compiler_can_build_shared, $1)=no])
+fi
+_LT_TAGDECL([pic_flag], [lt_prog_compiler_pic], [1],
+	[Additional compiler flags for building library objects])
+
+#
+# Check to make sure the static flag actually works.
+#
+wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1) eval lt_tmp_static_flag=\"$_LT_TAGVAR(lt_prog_compiler_static, $1)\"
+_LT_LINKER_OPTION([if $compiler static flag $lt_tmp_static_flag works],
+  _LT_TAGVAR(lt_cv_prog_compiler_static_works, $1),
+  $lt_tmp_static_flag,
+  [],
+  [_LT_TAGVAR(lt_prog_compiler_static, $1)=])
+_LT_TAGDECL([link_static_flag], [lt_prog_compiler_static], [1],
+	[Compiler flag to prevent dynamic linking])
+])# _LT_COMPILER_PIC
+
+
+# _LT_LINKER_SHLIBS([TAGNAME])
+# ----------------------------
+# See if the linker supports building shared libraries.
+m4_defun([_LT_LINKER_SHLIBS],
+[AC_REQUIRE([LT_PATH_LD])dnl
+AC_REQUIRE([LT_PATH_NM])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_EGREP])dnl
+m4_require([_LT_DECL_SED])dnl
+m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
+m4_require([_LT_TAG_COMPILER])dnl
+AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries])
+m4_if([$1], [CXX], [
+  _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  case $host_os in
+  aix[[4-9]]*)
+    # If we're using GNU nm, then we don't want the "-C" option.
+    # -C means demangle to AIX nm, but means don't demangle with GNU nm
+    if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+    else
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+    fi
+    ;;
+  pw32*)
+    _LT_TAGVAR(export_symbols_cmds, $1)="$ltdll_cmds"
+  ;;
+  cygwin* | mingw* | cegcc*)
+    _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/;/^.*[[ ]]__nm__/s/^.*[[ ]]__nm__\([[^ ]]*\)[[ ]][[^ ]]*/\1 DATA/;/^I[[ ]]/d;/^[[AITW]][[ ]]/s/.* //'\'' | sort | uniq > $export_symbols'
+  ;;
+  linux* | k*bsd*-gnu)
+    _LT_TAGVAR(link_all_deplibs, $1)=no
+  ;;
+  *)
+    _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  ;;
+  esac
+  _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*']
+], [
+  runpath_var=
+  _LT_TAGVAR(allow_undefined_flag, $1)=
+  _LT_TAGVAR(always_export_symbols, $1)=no
+  _LT_TAGVAR(archive_cmds, $1)=
+  _LT_TAGVAR(archive_expsym_cmds, $1)=
+  _LT_TAGVAR(compiler_needs_object, $1)=no
+  _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+  _LT_TAGVAR(export_dynamic_flag_spec, $1)=
+  _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
+  _LT_TAGVAR(hardcode_automatic, $1)=no
+  _LT_TAGVAR(hardcode_direct, $1)=no
+  _LT_TAGVAR(hardcode_direct_absolute, $1)=no
+  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+  _LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)=
+  _LT_TAGVAR(hardcode_libdir_separator, $1)=
+  _LT_TAGVAR(hardcode_minus_L, $1)=no
+  _LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+  _LT_TAGVAR(inherit_rpath, $1)=no
+  _LT_TAGVAR(link_all_deplibs, $1)=unknown
+  _LT_TAGVAR(module_cmds, $1)=
+  _LT_TAGVAR(module_expsym_cmds, $1)=
+  _LT_TAGVAR(old_archive_from_new_cmds, $1)=
+  _LT_TAGVAR(old_archive_from_expsyms_cmds, $1)=
+  _LT_TAGVAR(thread_safe_flag_spec, $1)=
+  _LT_TAGVAR(whole_archive_flag_spec, $1)=
+  # include_expsyms should be a list of space-separated symbols to be *always*
+  # included in the symbol list
+  _LT_TAGVAR(include_expsyms, $1)=
+  # exclude_expsyms can be an extended regexp of symbols to exclude
+  # it will be wrapped by ` (' and `)$', so one must not match beginning or
+  # end of line.  Example: `a|bc|.*d.*' will exclude the symbols `a' and `bc',
+  # as well as any symbol that contains `d'.
+  _LT_TAGVAR(exclude_expsyms, $1)=['_GLOBAL_OFFSET_TABLE_|_GLOBAL__F[ID]_.*']
+  # Although _GLOBAL_OFFSET_TABLE_ is a valid symbol C name, most a.out
+  # platforms (ab)use it in PIC code, but their linkers get confused if
+  # the symbol is explicitly referenced.  Since portable code cannot
+  # rely on this symbol name, it's probably fine to never include it in
+  # preloaded symbol tables.
+  # Exclude shared library initialization/finalization symbols.
+dnl Note also adjust exclude_expsyms for C++ above.
+  extract_expsyms_cmds=
+
+  case $host_os in
+  cygwin* | mingw* | pw32* | cegcc*)
+    # FIXME: the MSVC++ port hasn't been tested in a loooong time
+    # When not using gcc, we currently assume that we are using
+    # Microsoft Visual C++.
+    if test "$GCC" != yes; then
+      with_gnu_ld=no
+    fi
+    ;;
+  interix*)
+    # we just hope/assume this is gcc and not c89 (= MSVC++)
+    with_gnu_ld=yes
+    ;;
+  openbsd*)
+    with_gnu_ld=no
+    ;;
+  linux* | k*bsd*-gnu)
+    _LT_TAGVAR(link_all_deplibs, $1)=no
+    ;;
+  esac
+
+  _LT_TAGVAR(ld_shlibs, $1)=yes
+  if test "$with_gnu_ld" = yes; then
+    # If archive_cmds runs LD, not CC, wlarc should be empty
+    wlarc='${wl}'
+
+    # Set some defaults for GNU ld with shared library support. These
+    # are reset later if shared libraries are not supported. Putting them
+    # here allows them to be overridden if necessary.
+    runpath_var=LD_RUN_PATH
+    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+    # ancient GNU ld didn't support --whole-archive et. al.
+    if $LD --help 2>&1 | $GREP 'no-whole-archive' > /dev/null; then
+      _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
+    else
+      _LT_TAGVAR(whole_archive_flag_spec, $1)=
+    fi
+    supports_anon_versioning=no
+    case `$LD -v 2>&1` in
+      *GNU\ gold*) supports_anon_versioning=yes ;;
+      *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.10.*) ;; # catch versions < 2.11
+      *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
+      *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ...
+      *\ 2.11.*) ;; # other 2.11 versions
+      *) supports_anon_versioning=yes ;;
+    esac
+
+    # See if GNU ld supports shared libraries.
+    case $host_os in
+    aix[[3-9]]*)
+      # On AIX/PPC, the GNU linker is very broken
+      if test "$host_cpu" != ia64; then
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: the GNU linker, at least up to release 2.9.1, is reported
+*** to be unable to reliably create shared libraries on AIX.
+*** Therefore, libtool is disabling shared libraries support.  If you
+*** really care for shared libraries, you may want to modify your PATH
+*** so that a non-GNU linker is found, and then restart.
+
+_LT_EOF
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+            _LT_TAGVAR(archive_expsym_cmds, $1)=''
+        ;;
+      m68k)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes
+        ;;
+      esac
+      ;;
+
+    beos*)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	# Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	# support --undefined.  This deserves some investigation.  FIXME
+	_LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless,
+      # as there is no search path for DLLs.
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      _LT_TAGVAR(always_export_symbols, $1)=no
+      _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+      _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED -e '\''/^[[BCDGRS]][[ ]]/s/.*[[ ]]\([[^ ]]*\)/\1 DATA/'\'' | $SED -e '\''/^[[AITW]][[ ]]/s/.*[[ ]]//'\'' | sort | uniq > $export_symbols'
+
+      if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+	# If the export-symbols file already is a .def file (1st line
+	# is EXPORTS), use it as is; otherwise, prepend...
+	_LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then
+	  cp $export_symbols $output_objdir/$soname.def;
+	else
+	  echo EXPORTS > $output_objdir/$soname.def;
+	  cat $export_symbols >> $output_objdir/$soname.def;
+	fi~
+	$CC -shared $output_objdir/$soname.def $libobjs $deplibs $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    interix[[3-9]]*)
+      _LT_TAGVAR(hardcode_direct, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+      # Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+      # Instead, shared libraries are loaded at an image base (0x10000000 by
+      # default) and relocated if they conflict, which is a slow very memory
+      # consuming and fragmenting process.  To avoid this, we pick a random,
+      # 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+      # time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      _LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+      ;;
+
+    gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+      tmp_diet=no
+      if test "$host_os" = linux-dietlibc; then
+	case $cc_basename in
+	  diet\ *) tmp_diet=yes;;	# linux-dietlibc with static linking (!diet-dyn)
+	esac
+      fi
+      if $LD --help 2>&1 | $EGREP ': supported targets:.* elf' > /dev/null \
+	 && test "$tmp_diet" = no
+      then
+	tmp_addflag=
+	tmp_sharedflag='-shared'
+	case $cc_basename,$host_cpu in
+        pgcc*)				# Portland Group C compiler
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  tmp_addflag=' $pic_flag'
+	  ;;
+	pgf77* | pgf90* | pgf95*)	# Portland Group f77 and f90 compilers
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  tmp_addflag=' $pic_flag -Mnomain' ;;
+	ecc*,ia64* | icc*,ia64*)	# Intel C compiler on ia64
+	  tmp_addflag=' -i_dynamic' ;;
+	efc*,ia64* | ifort*,ia64*)	# Intel Fortran compiler on ia64
+	  tmp_addflag=' -i_dynamic -nofor_main' ;;
+	ifc* | ifort*)			# Intel Fortran compiler
+	  tmp_addflag=' -nofor_main' ;;
+	lf95*)				# Lahey Fortran 8.1
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)=
+	  tmp_sharedflag='--shared' ;;
+	xl[[cC]]*)			# IBM XL C 8.0 on PPC (deal with xlf below)
+	  tmp_sharedflag='-qmkshrobj'
+	  tmp_addflag= ;;
+	esac
+	case `$CC -V 2>&1 | sed 5q` in
+	*Sun\ C*)			# Sun C 5.9
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	  _LT_TAGVAR(compiler_needs_object, $1)=yes
+	  tmp_sharedflag='-G' ;;
+	*Sun\ F*)			# Sun Fortran 8.3
+	  tmp_sharedflag='-G' ;;
+	esac
+	_LT_TAGVAR(archive_cmds, $1)='$CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+
+        if test "x$supports_anon_versioning" = xyes; then
+          _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+	    cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+	    echo "local: *; };" >> $output_objdir/$libname.ver~
+	    $CC '"$tmp_sharedflag""$tmp_addflag"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'
+        fi
+
+	case $cc_basename in
+	xlf*)
+	  # IBM XL Fortran 10.1 on PPC cannot create shared libs itself
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='--whole-archive$convenience --no-whole-archive'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+	  _LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)='-rpath $libdir'
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -shared $libobjs $deplibs $compiler_flags -soname $soname -o $lib'
+	  if test "x$supports_anon_versioning" = xyes; then
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+	      cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+	      echo "local: *; };" >> $output_objdir/$libname.ver~
+	      $LD -shared $libobjs $deplibs $compiler_flags -soname $soname -version-script $output_objdir/$libname.ver -o $lib'
+	  fi
+	  ;;
+	esac
+      else
+        _LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
+	wlarc=
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      fi
+      ;;
+
+    solaris*)
+      if $LD -v 2>&1 | $GREP 'BFD 2\.8' > /dev/null; then
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: The releases 2.8.* of the GNU linker cannot reliably
+*** create shared libraries on Solaris systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.9.1 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+      elif $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX*)
+      case `$LD -v 2>&1` in
+        *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.1[[0-5]].*)
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	cat <<_LT_EOF 1>&2
+
+*** Warning: Releases of the GNU linker prior to 2.16.91.0.3 can not
+*** reliably create shared libraries on SCO systems.  Therefore, libtool
+*** is disabling shared libraries support.  We urge you to upgrade GNU
+*** binutils to release 2.16.91.0.3 or newer.  Another option is to modify
+*** your PATH or compiler configuration so that the native linker is
+*** used, and then restart.
+
+_LT_EOF
+	;;
+	*)
+	  # For security reasons, it is highly recommended that you always
+	  # use absolute paths for naming shared libraries, and exclude the
+	  # DT_RUNPATH tag from executables and libraries.  But doing so
+	  # requires that you compile everything twice, which is a pain.
+	  if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+	  else
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	  fi
+	;;
+      esac
+      ;;
+
+    sunos4*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      wlarc=
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *)
+      if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+    esac
+
+    if test "$_LT_TAGVAR(ld_shlibs, $1)" = no; then
+      runpath_var=
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)=
+      _LT_TAGVAR(whole_archive_flag_spec, $1)=
+    fi
+  else
+    # PORTME fill in a description of your system's linker (not GNU ld)
+    case $host_os in
+    aix3*)
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      _LT_TAGVAR(always_export_symbols, $1)=yes
+      _LT_TAGVAR(archive_expsym_cmds, $1)='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
+      # Note: this linker hardcodes the directories in LIBPATH if there
+      # are no directories specified by -L.
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      if test "$GCC" = yes && test -z "$lt_prog_compiler_static"; then
+	# Neither direct hardcoding nor static linking is supported with a
+	# broken collect2.
+	_LT_TAGVAR(hardcode_direct, $1)=unsupported
+      fi
+      ;;
+
+    aix[[4-9]]*)
+      if test "$host_cpu" = ia64; then
+	# On IA64, the linker does run time linking by default, so we don't
+	# have to do anything special.
+	aix_use_runtimelinking=no
+	exp_sym_flag='-Bexport'
+	no_entry_flag=""
+      else
+	# If we're using GNU nm, then we don't want the "-C" option.
+	# -C means demangle to AIX nm, but means don't demangle with GNU nm
+	if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
+	  _LT_TAGVAR(export_symbols_cmds, $1)='$NM -Bpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+	else
+	  _LT_TAGVAR(export_symbols_cmds, $1)='$NM -BCpg $libobjs $convenience | awk '\''{ if (((\$ 2 == "T") || (\$ 2 == "D") || (\$ 2 == "B")) && ([substr](\$ 3,1,1) != ".")) { print \$ 3 } }'\'' | sort -u > $export_symbols'
+	fi
+	aix_use_runtimelinking=no
+
+	# Test if we are trying to use run time linking or normal
+	# AIX style linking. If -brtl is somewhere in LDFLAGS, we
+	# need to do runtime linking.
+	case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
+	  for ld_flag in $LDFLAGS; do
+	  if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then
+	    aix_use_runtimelinking=yes
+	    break
+	  fi
+	  done
+	  ;;
+	esac
+
+	exp_sym_flag='-bexport'
+	no_entry_flag='-bnoentry'
+      fi
+
+      # When large executables or shared objects are built, AIX ld can
+      # have problems creating the table of contents.  If linking a library
+      # or program results in "error TOC overflow" add -mminimal-toc to
+      # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+      # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+      _LT_TAGVAR(archive_cmds, $1)=''
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      _LT_TAGVAR(file_list_spec, $1)='${wl}-f,'
+
+      if test "$GCC" = yes; then
+	case $host_os in aix4.[[012]]|aix4.[[012]].*)
+	# We only want to do this on AIX 4.2 and lower, the check
+	# below for broken collect2 doesn't work under 4.3+
+	  collect2name=`${CC} -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	   strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	  # We have reworked collect2
+	  :
+	  else
+	  # We have old collect2
+	  _LT_TAGVAR(hardcode_direct, $1)=unsupported
+	  # It fails to find uninstalled libraries when the uninstalled
+	  # path is not listed in the libpath.  Setting hardcode_minus_L
+	  # to unsupported forces relinking
+	  _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	  _LT_TAGVAR(hardcode_libdir_separator, $1)=
+	  fi
+	  ;;
+	esac
+	shared_flag='-shared'
+	if test "$aix_use_runtimelinking" = yes; then
+	  shared_flag="$shared_flag "'${wl}-G'
+	fi
+	_LT_TAGVAR(link_all_deplibs, $1)=no
+      else
+	# not using gcc
+	if test "$host_cpu" = ia64; then
+	# VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	# chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+	else
+	  if test "$aix_use_runtimelinking" = yes; then
+	    shared_flag='${wl}-G'
+	  else
+	    shared_flag='${wl}-bM:SRE'
+	  fi
+	fi
+      fi
+
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-bexpall'
+      # It seems that -bexpall does not export symbols beginning with
+      # underscore (_), so it is better to generate a list of symbols to export.
+      _LT_TAGVAR(always_export_symbols, $1)=yes
+      if test "$aix_use_runtimelinking" = yes; then
+	# Warning - without using the other runtime loading flags (-brtl),
+	# -berok will link without error, but may produce a broken library.
+	_LT_TAGVAR(allow_undefined_flag, $1)='-berok'
+        # Determine the default libpath from the value encoded in an
+        # empty executable.
+        _LT_SYS_MODULE_PATH_AIX
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath"
+        _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags `if test "x${allow_undefined_flag}" != "x"; then $ECHO "X${wl}${allow_undefined_flag}" | $Xsed; else :; fi` '"\${wl}$exp_sym_flag:\$export_symbols $shared_flag"
+      else
+	if test "$host_cpu" = ia64; then
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $libdir:/usr/lib:/lib'
+	  _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs"
+	  _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$exp_sym_flag:\$export_symbols"
+	else
+	 # Determine the default libpath from the value encoded in an
+	 # empty executable.
+	 _LT_SYS_MODULE_PATH_AIX
+	 _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath"
+	  # Warning - without using the other run time loading flags,
+	  # -berok will link without error, but may produce a broken library.
+	  _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok'
+	  _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok'
+	  # Exported symbols can be pulled into shared objects from archives
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience'
+	  _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+	  # This is similar to how AIX traditionally builds its shared libraries.
+	  _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname'
+	fi
+      fi
+      ;;
+
+    amigaos*)
+      case $host_cpu in
+      powerpc)
+            # see comment about AmigaOS4 .so support
+            _LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+            _LT_TAGVAR(archive_expsym_cmds, $1)=''
+        ;;
+      m68k)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/a2ixlibrary.data~$ECHO "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$ECHO "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$ECHO "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$ECHO "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
+            _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes
+        ;;
+      esac
+      ;;
+
+    bsdi[[45]]*)
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)=-rdynamic
+      ;;
+
+    cygwin* | mingw* | pw32* | cegcc*)
+      # When not using gcc, we currently assume that we are using
+      # Microsoft Visual C++.
+      # hardcode_libdir_flag_spec is actually meaningless, as there is
+      # no search path for DLLs.
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=' '
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      # Tell ltmain to make .lib files, not .a files.
+      libext=lib
+      # Tell ltmain to make .dll files, not .so files.
+      shrext_cmds=".dll"
+      # FIXME: Setting linknames here is a bad hack.
+      _LT_TAGVAR(archive_cmds, $1)='$CC -o $lib $libobjs $compiler_flags `$ECHO "X$deplibs" | $Xsed -e '\''s/ -lc$//'\''` -link -dll~linknames='
+      # The linker will automatically build a .lib file if we build a DLL.
+      _LT_TAGVAR(old_archive_from_new_cmds, $1)='true'
+      # FIXME: Should let the user specify the lib program.
+      _LT_TAGVAR(old_archive_cmds, $1)='lib -OUT:$oldlib$oldobjs$old_deplibs'
+      _LT_TAGVAR(fix_srcfile_path, $1)='`cygpath -w "$srcfile"`'
+      _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+      ;;
+
+    darwin* | rhapsody*)
+      _LT_DARWIN_LINKER_FEATURES($1)
+      ;;
+
+    dgux*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    freebsd1*)
+      _LT_TAGVAR(ld_shlibs, $1)=no
+      ;;
+
+    # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
+    # support.  Future versions do this automatically, but an explicit c++rt0.o
+    # does not break anything, and helps significantly (at the cost of a little
+    # extra space).
+    freebsd2.2*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    # Unfortunately, older versions of FreeBSD 2 do not have this feature.
+    freebsd2*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
+    freebsd* | dragonfly*)
+      _LT_TAGVAR(archive_cmds, $1)='$CC -shared -o $lib $libobjs $deplibs $compiler_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    hpux9*)
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared -fPIC ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $libobjs $deplibs $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+
+      # hardcode_minus_L: Not really in the search PATH,
+      # but as the default location of the library.
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+      ;;
+
+    hpux10*)
+      if test "$GCC" = yes -a "$with_gnu_ld" = no; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      if test "$with_gnu_ld" = no; then
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir'
+	_LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)='+b $libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=:
+	_LT_TAGVAR(hardcode_direct, $1)=yes
+	_LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+	# hardcode_minus_L: Not really in the search PATH,
+	# but as the default location of the library.
+	_LT_TAGVAR(hardcode_minus_L, $1)=yes
+      fi
+      ;;
+
+    hpux11*)
+      if test "$GCC" = yes -a "$with_gnu_ld" = no; then
+	case $host_cpu in
+	hppa*64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      else
+	case $host_cpu in
+	hppa*64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	ia64*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	esac
+      fi
+      if test "$with_gnu_ld" = no; then
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	case $host_cpu in
+	hppa*64*|ia64*)
+	  _LT_TAGVAR(hardcode_direct, $1)=no
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	  ;;
+	*)
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+
+	  # hardcode_minus_L: Not really in the search PATH,
+	  # but as the default location of the library.
+	  _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	  ;;
+	esac
+      fi
+      ;;
+
+    irix5* | irix6* | nonstopux*)
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+	# Try to use the -exported_symbol ld option, if it does not
+	# work, assume that -exports_file does not work either and
+	# implicitly export all symbols.
+        save_LDFLAGS="$LDFLAGS"
+        LDFLAGS="$LDFLAGS -shared ${wl}-exported_symbol ${wl}foo ${wl}-update_registry ${wl}/dev/null"
+        AC_LINK_IFELSE(int foo(void) {},
+          _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations ${wl}-exports_file ${wl}$export_symbols -o $lib'
+        )
+        LDFLAGS="$save_LDFLAGS"
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -exports_file $export_symbols -o $lib'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(inherit_rpath, $1)=yes
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      ;;
+
+    netbsd* | netbsdelf*-gnu)
+      if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    newsos6)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *nto* | *qnx*)
+      ;;
+
+    openbsd*)
+      if test -f /usr/libexec/ld.so; then
+	_LT_TAGVAR(hardcode_direct, $1)=yes
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	if test -z "`echo __ELF__ | $CC -E - | $GREP __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags ${wl}-retain-symbols-file,$export_symbols'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	  _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+	else
+	  case $host_os in
+	   openbsd[[01]].* | openbsd2.[[0-7]] | openbsd2.[[0-7]].*)
+	     _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
+	     _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	     ;;
+	   *)
+	     _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag -o $lib $libobjs $deplibs $compiler_flags'
+	     _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	     ;;
+	  esac
+	fi
+      else
+	_LT_TAGVAR(ld_shlibs, $1)=no
+      fi
+      ;;
+
+    os2*)
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+      _LT_TAGVAR(archive_cmds, $1)='$ECHO "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$ECHO "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~$ECHO DATA >> $output_objdir/$libname.def~$ECHO " SINGLE NONSHARED" >> $output_objdir/$libname.def~$ECHO EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def'
+      _LT_TAGVAR(old_archive_from_new_cmds, $1)='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def'
+      ;;
+
+    osf3*)
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+      else
+	_LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      ;;
+
+    osf4* | osf5*)	# as osf3* with the addition of -msym flag
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+      else
+	_LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags -msym -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done; printf "%s\\n" "-hidden">> $lib.exp~
+	$CC -shared${allow_undefined_flag} ${wl}-input ${wl}$lib.exp $compiler_flags $libobjs $deplibs -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib~$RM $lib.exp'
+
+	# Both c and cxx compiler support -rpath directly
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+      fi
+      _LT_TAGVAR(archive_cmds_need_lc, $1)='no'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+      ;;
+
+    solaris*)
+      _LT_TAGVAR(no_undefined_flag, $1)=' -z defs'
+      if test "$GCC" = yes; then
+	wlarc='${wl}'
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-z ${wl}text ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $CC -shared ${wl}-z ${wl}text ${wl}-M ${wl}$lib.exp ${wl}-h ${wl}$soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+      else
+	case `$CC -V 2>&1` in
+	*"Compilers 5.0"*)
+	  wlarc=''
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$RM $lib.exp'
+	  ;;
+	*)
+	  wlarc='${wl}'
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	  $CC -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $compiler_flags~$RM $lib.exp'
+	  ;;
+	esac
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      case $host_os in
+      solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+      *)
+	# The compiler driver will combine and reorder linker options,
+	# but understands `-z linker_flag'.  GCC discards it without `$wl',
+	# but is careful enough not to reorder.
+	# Supported since Solaris 2.6 (maybe 2.5.1?)
+	if test "$GCC" = yes; then
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract'
+	else
+	  _LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract'
+	fi
+	;;
+      esac
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      ;;
+
+    sunos4*)
+      if test "x$host_vendor" = xsequent; then
+	# Use $CC to link under sequent, because it throws in some extra .o
+	# files that make .init and .fini sections work.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h $soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
+      fi
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_direct, $1)=yes
+      _LT_TAGVAR(hardcode_minus_L, $1)=yes
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    sysv4)
+      case $host_vendor in
+	sni)
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(hardcode_direct, $1)=yes # is this really true???
+	;;
+	siemens)
+	  ## LD is ld it makes a PLAMLIB
+	  ## CC just makes a GrossModule.
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(reload_cmds, $1)='$CC -r -o $output$reload_objs'
+	  _LT_TAGVAR(hardcode_direct, $1)=no
+        ;;
+	motorola)
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	  _LT_TAGVAR(hardcode_direct, $1)=no #Motorola manual says yes, but my tests say they lie
+	;;
+      esac
+      runpath_var='LD_RUN_PATH'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    sysv4.3*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='-Bexport'
+      ;;
+
+    sysv4*MP*)
+      if test -d /usr/nec; then
+	_LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	runpath_var=LD_RUN_PATH
+	hardcode_runpath_var=yes
+	_LT_TAGVAR(ld_shlibs, $1)=yes
+      fi
+      ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*)
+      _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      runpath_var='LD_RUN_PATH'
+
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    sysv5* | sco3.2v5* | sco5v6*)
+      # Note: We can NOT use -z defs as we might desire, because we do not
+      # link with -lc, and that would cause any symbols used from libc to
+      # always be unresolved, which means just about no library would
+      # ever link correctly.  If we're not using GNU ld we use -z text
+      # though, which does catch some bad symbols but isn't as heavy-handed
+      # as -z defs.
+      _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text'
+      _LT_TAGVAR(allow_undefined_flag, $1)='${wl}-z,nodefs'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R,$libdir'
+      _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+      _LT_TAGVAR(link_all_deplibs, $1)=yes
+      _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Bexport'
+      runpath_var='LD_RUN_PATH'
+
+      if test "$GCC" = yes; then
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      else
+	_LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+      fi
+      ;;
+
+    uts4*)
+      _LT_TAGVAR(archive_cmds, $1)='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
+      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      ;;
+
+    *)
+      _LT_TAGVAR(ld_shlibs, $1)=no
+      ;;
+    esac
+
+    if test x$host_vendor = xsni; then
+      case $host in
+      sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Blargedynsym'
+	;;
+      esac
+    fi
+  fi
+])
+AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)])
+test "$_LT_TAGVAR(ld_shlibs, $1)" = no && can_build_shared=no
+
+_LT_TAGVAR(with_gnu_ld, $1)=$with_gnu_ld
+
+_LT_DECL([], [libext], [0], [Old archive suffix (normally "a")])dnl
+_LT_DECL([], [shrext_cmds], [1], [Shared library suffix (normally ".so")])dnl
+_LT_DECL([], [extract_expsyms_cmds], [2],
+    [The commands to extract the exported symbol list from a shared archive])
+
+#
+# Do we need to explicitly link libc?
+#
+case "x$_LT_TAGVAR(archive_cmds_need_lc, $1)" in
+x|xyes)
+  # Assume -lc should be added
+  _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+
+  if test "$enable_shared" = yes && test "$GCC" = yes; then
+    case $_LT_TAGVAR(archive_cmds, $1) in
+    *'~'*)
+      # FIXME: we may have to deal with multi-command sequences.
+      ;;
+    '$CC '*)
+      # Test whether the compiler implicitly links with -lc since on some
+      # systems, -lgcc has to come before -lc. If gcc already passes -lc
+      # to ld, don't add -lc before -lgcc.
+      AC_MSG_CHECKING([whether -lc should be explicitly linked in])
+      $RM conftest*
+      echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+      if AC_TRY_EVAL(ac_compile) 2>conftest.err; then
+        soname=conftest
+        lib=conftest
+        libobjs=conftest.$ac_objext
+        deplibs=
+        wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1)
+	pic_flag=$_LT_TAGVAR(lt_prog_compiler_pic, $1)
+        compiler_flags=-v
+        linker_flags=-v
+        verstring=
+        output_objdir=.
+        libname=conftest
+        lt_save_allow_undefined_flag=$_LT_TAGVAR(allow_undefined_flag, $1)
+        _LT_TAGVAR(allow_undefined_flag, $1)=
+        if AC_TRY_EVAL(_LT_TAGVAR(archive_cmds, $1) 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1)
+        then
+	  _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+        else
+	  _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+        fi
+        _LT_TAGVAR(allow_undefined_flag, $1)=$lt_save_allow_undefined_flag
+      else
+        cat conftest.err 1>&5
+      fi
+      $RM conftest*
+      AC_MSG_RESULT([$_LT_TAGVAR(archive_cmds_need_lc, $1)])
+      ;;
+    esac
+  fi
+  ;;
+esac
+
+_LT_TAGDECL([build_libtool_need_lc], [archive_cmds_need_lc], [0],
+    [Whether or not to add -lc for building shared libraries])
+_LT_TAGDECL([allow_libtool_libs_with_static_runtimes],
+    [enable_shared_with_static_runtimes], [0],
+    [Whether or not to disallow shared libs when runtime libs are static])
+_LT_TAGDECL([], [export_dynamic_flag_spec], [1],
+    [Compiler flag to allow reflexive dlopens])
+_LT_TAGDECL([], [whole_archive_flag_spec], [1],
+    [Compiler flag to generate shared objects directly from archives])
+_LT_TAGDECL([], [compiler_needs_object], [1],
+    [Whether the compiler copes with passing no objects directly])
+_LT_TAGDECL([], [old_archive_from_new_cmds], [2],
+    [Create an old-style archive from a shared archive])
+_LT_TAGDECL([], [old_archive_from_expsyms_cmds], [2],
+    [Create a temporary old-style archive to link instead of a shared archive])
+_LT_TAGDECL([], [archive_cmds], [2], [Commands used to build a shared archive])
+_LT_TAGDECL([], [archive_expsym_cmds], [2])
+_LT_TAGDECL([], [module_cmds], [2],
+    [Commands used to build a loadable module if different from building
+    a shared archive.])
+_LT_TAGDECL([], [module_expsym_cmds], [2])
+_LT_TAGDECL([], [with_gnu_ld], [1],
+    [Whether we are building with GNU ld or not])
+_LT_TAGDECL([], [allow_undefined_flag], [1],
+    [Flag that allows shared libraries with undefined symbols to be built])
+_LT_TAGDECL([], [no_undefined_flag], [1],
+    [Flag that enforces no undefined symbols])
+_LT_TAGDECL([], [hardcode_libdir_flag_spec], [1],
+    [Flag to hardcode $libdir into a binary during linking.
+    This must work even if $libdir does not exist])
+_LT_TAGDECL([], [hardcode_libdir_flag_spec_ld], [1],
+    [[If ld is used when linking, flag to hardcode $libdir into a binary
+    during linking.  This must work even if $libdir does not exist]])
+_LT_TAGDECL([], [hardcode_libdir_separator], [1],
+    [Whether we need a single "-rpath" flag with a separated argument])
+_LT_TAGDECL([], [hardcode_direct], [0],
+    [Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
+    DIR into the resulting binary])
+_LT_TAGDECL([], [hardcode_direct_absolute], [0],
+    [Set to "yes" if using DIR/libNAME${shared_ext} during linking hardcodes
+    DIR into the resulting binary and the resulting library dependency is
+    "absolute", i.e impossible to change by setting ${shlibpath_var} if the
+    library is relocated])
+_LT_TAGDECL([], [hardcode_minus_L], [0],
+    [Set to "yes" if using the -LDIR flag during linking hardcodes DIR
+    into the resulting binary])
+_LT_TAGDECL([], [hardcode_shlibpath_var], [0],
+    [Set to "yes" if using SHLIBPATH_VAR=DIR during linking hardcodes DIR
+    into the resulting binary])
+_LT_TAGDECL([], [hardcode_automatic], [0],
+    [Set to "yes" if building a shared library automatically hardcodes DIR
+    into the library and all subsequent libraries and executables linked
+    against it])
+_LT_TAGDECL([], [inherit_rpath], [0],
+    [Set to yes if linker adds runtime paths of dependent libraries
+    to runtime path list])
+_LT_TAGDECL([], [link_all_deplibs], [0],
+    [Whether libtool must link a program against all its dependency libraries])
+_LT_TAGDECL([], [fix_srcfile_path], [1],
+    [Fix the shell variable $srcfile for the compiler])
+_LT_TAGDECL([], [always_export_symbols], [0],
+    [Set to "yes" if exported symbols are required])
+_LT_TAGDECL([], [export_symbols_cmds], [2],
+    [The commands to list exported symbols])
+_LT_TAGDECL([], [exclude_expsyms], [1],
+    [Symbols that should not be listed in the preloaded symbols])
+_LT_TAGDECL([], [include_expsyms], [1],
+    [Symbols that must always be exported])
+_LT_TAGDECL([], [prelink_cmds], [2],
+    [Commands necessary for linking programs (against libraries) with templates])
+_LT_TAGDECL([], [file_list_spec], [1],
+    [Specify filename containing input files])
+dnl FIXME: Not yet implemented
+dnl _LT_TAGDECL([], [thread_safe_flag_spec], [1],
+dnl    [Compiler flag to generate thread safe objects])
+])# _LT_LINKER_SHLIBS
+
+
+# _LT_LANG_C_CONFIG([TAG])
+# ------------------------
+# Ensure that the configuration variables for a C compiler are suitably
+# defined.  These variables are subsequently used by _LT_CONFIG to write
+# the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_C_CONFIG],
+[m4_require([_LT_DECL_EGREP])dnl
+lt_save_CC="$CC"
+AC_LANG_PUSH(C)
+
+# Source file extension for C test sources.
+ac_ext=c
+
+# Object file extension for compiled C test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="int some_variable = 0;"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='int main(){return(0);}'
+
+_LT_TAG_COMPILER
+# Save the default compiler, since it gets overwritten when the other
+# tags are being tested, and _LT_TAGVAR(compiler, []) is a NOP.
+compiler_DEFAULT=$CC
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+## CAVEAT EMPTOR:
+## There is no encapsulation within the following macros, do not change
+## the running order or otherwise move them around unless you know exactly
+## what you are doing...
+if test -n "$compiler"; then
+  _LT_COMPILER_NO_RTTI($1)
+  _LT_COMPILER_PIC($1)
+  _LT_COMPILER_C_O($1)
+  _LT_COMPILER_FILE_LOCKS($1)
+  _LT_LINKER_SHLIBS($1)
+  _LT_SYS_DYNAMIC_LINKER($1)
+  _LT_LINKER_HARDCODE_LIBPATH($1)
+  LT_SYS_DLOPEN_SELF
+  _LT_CMD_STRIPLIB
+
+  # Report which library types will actually be built
+  AC_MSG_CHECKING([if libtool supports shared libraries])
+  AC_MSG_RESULT([$can_build_shared])
+
+  AC_MSG_CHECKING([whether to build shared libraries])
+  test "$can_build_shared" = "no" && enable_shared=no
+
+  # On AIX, shared libraries and static libraries use the same namespace, and
+  # are all built from PIC.
+  case $host_os in
+  aix3*)
+    test "$enable_shared" = yes && enable_static=no
+    if test -n "$RANLIB"; then
+      archive_cmds="$archive_cmds~\$RANLIB \$lib"
+      postinstall_cmds='$RANLIB $lib'
+    fi
+    ;;
+
+  aix[[4-9]]*)
+    if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
+      test "$enable_shared" = yes && enable_static=no
+    fi
+    ;;
+  esac
+  AC_MSG_RESULT([$enable_shared])
+
+  AC_MSG_CHECKING([whether to build static libraries])
+  # Make sure either enable_shared or enable_static is yes.
+  test "$enable_shared" = yes || enable_static=yes
+  AC_MSG_RESULT([$enable_static])
+
+  _LT_CONFIG($1)
+fi
+AC_LANG_POP
+CC="$lt_save_CC"
+])# _LT_LANG_C_CONFIG
+
+
+# _LT_PROG_CXX
+# ------------
+# Since AC_PROG_CXX is broken, in that it returns g++ if there is no c++
+# compiler, we have our own version here.
+m4_defun([_LT_PROG_CXX],
+[
+pushdef([AC_MSG_ERROR], [_lt_caught_CXX_error=yes])
+AC_PROG_CXX
+if test -n "$CXX" && ( test "X$CXX" != "Xno" &&
+    ( (test "X$CXX" = "Xg++" && `g++ -v >/dev/null 2>&1` ) ||
+    (test "X$CXX" != "Xg++"))) ; then
+  AC_PROG_CXXCPP
+else
+  _lt_caught_CXX_error=yes
+fi
+popdef([AC_MSG_ERROR])
+])# _LT_PROG_CXX
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([_LT_PROG_CXX], [])
+
+
+# _LT_LANG_CXX_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for a C++ compiler are suitably
+# defined.  These variables are subsequently used by _LT_CONFIG to write
+# the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_CXX_CONFIG],
+[AC_REQUIRE([_LT_PROG_CXX])dnl
+m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+m4_require([_LT_DECL_EGREP])dnl
+
+AC_LANG_PUSH(C++)
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(compiler_needs_object, $1)=no
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_shlibpath_var, $1)=unsupported
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for C++ test sources.
+ac_ext=cpp
+
+# Object file extension for compiled C++ test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the CXX compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test "$_lt_caught_CXX_error" != yes; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="int some_variable = 0;"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code='int main(int, char *[[]]) { return(0); }'
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC=$CC
+  lt_save_LD=$LD
+  lt_save_GCC=$GCC
+  GCC=$GXX
+  lt_save_with_gnu_ld=$with_gnu_ld
+  lt_save_path_LD=$lt_cv_path_LD
+  if test -n "${lt_cv_prog_gnu_ldcxx+set}"; then
+    lt_cv_prog_gnu_ld=$lt_cv_prog_gnu_ldcxx
+  else
+    $as_unset lt_cv_prog_gnu_ld
+  fi
+  if test -n "${lt_cv_path_LDCXX+set}"; then
+    lt_cv_path_LD=$lt_cv_path_LDCXX
+  else
+    $as_unset lt_cv_path_LD
+  fi
+  test -z "${LDCXX+set}" || LD=$LDCXX
+  CC=${CXX-"c++"}
+  compiler=$CC
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+
+  if test -n "$compiler"; then
+    # We don't want -fno-exception when compiling C++ code, so set the
+    # no_builtin_flag separately
+    if test "$GXX" = yes; then
+      _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=' -fno-builtin'
+    else
+      _LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)=
+    fi
+
+    if test "$GXX" = yes; then
+      # Set up default GNU C++ configuration
+
+      LT_PATH_LD
+
+      # Check if GNU C++ uses GNU ld as the underlying linker, since the
+      # archiving commands below assume that GNU ld is being used.
+      if test "$with_gnu_ld" = yes; then
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
+        _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+
+        # If archive_cmds runs LD, not CC, wlarc should be empty
+        # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
+        #     investigate it a little bit more. (MM)
+        wlarc='${wl}'
+
+        # ancient GNU ld didn't support --whole-archive et. al.
+        if eval "`$CC -print-prog-name=ld` --help 2>&1" |
+	  $GREP 'no-whole-archive' > /dev/null; then
+          _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
+        else
+          _LT_TAGVAR(whole_archive_flag_spec, $1)=
+        fi
+      else
+        with_gnu_ld=no
+        wlarc=
+
+        # A generic and very simple default shared library creation
+        # command for GNU C++ for the case where it uses the native
+        # linker, instead of GNU ld.  If possible, this setting should
+        # overridden to take advantage of the native linker features on
+        # the platform it is being used on.
+        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+      fi
+
+      # Commands to make compiler produce verbose output that lists
+      # what "hidden" libraries, object files and flags are used when
+      # linking a shared library.
+      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "\-L"'
+
+    else
+      GXX=no
+      with_gnu_ld=no
+      wlarc=
+    fi
+
+    # PORTME: fill in a description of your system's C++ link characteristics
+    AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries])
+    _LT_TAGVAR(ld_shlibs, $1)=yes
+    case $host_os in
+      aix3*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+      aix[[4-9]]*)
+        if test "$host_cpu" = ia64; then
+          # On IA64, the linker does run time linking by default, so we don't
+          # have to do anything special.
+          aix_use_runtimelinking=no
+          exp_sym_flag='-Bexport'
+          no_entry_flag=""
+        else
+          aix_use_runtimelinking=no
+
+          # Test if we are trying to use run time linking or normal
+          # AIX style linking. If -brtl is somewhere in LDFLAGS, we
+          # need to do runtime linking.
+          case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
+	    for ld_flag in $LDFLAGS; do
+	      case $ld_flag in
+	      *-brtl*)
+	        aix_use_runtimelinking=yes
+	        break
+	        ;;
+	      esac
+	    done
+	    ;;
+          esac
+
+          exp_sym_flag='-bexport'
+          no_entry_flag='-bnoentry'
+        fi
+
+        # When large executables or shared objects are built, AIX ld can
+        # have problems creating the table of contents.  If linking a library
+        # or program results in "error TOC overflow" add -mminimal-toc to
+        # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
+        # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
+
+        _LT_TAGVAR(archive_cmds, $1)=''
+        _LT_TAGVAR(hardcode_direct, $1)=yes
+        _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+        _LT_TAGVAR(link_all_deplibs, $1)=yes
+        _LT_TAGVAR(file_list_spec, $1)='${wl}-f,'
+
+        if test "$GXX" = yes; then
+          case $host_os in aix4.[[012]]|aix4.[[012]].*)
+          # We only want to do this on AIX 4.2 and lower, the check
+          # below for broken collect2 doesn't work under 4.3+
+	  collect2name=`${CC} -print-prog-name=collect2`
+	  if test -f "$collect2name" &&
+	     strings "$collect2name" | $GREP resolve_lib_name >/dev/null
+	  then
+	    # We have reworked collect2
+	    :
+	  else
+	    # We have old collect2
+	    _LT_TAGVAR(hardcode_direct, $1)=unsupported
+	    # It fails to find uninstalled libraries when the uninstalled
+	    # path is not listed in the libpath.  Setting hardcode_minus_L
+	    # to unsupported forces relinking
+	    _LT_TAGVAR(hardcode_minus_L, $1)=yes
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=
+	  fi
+          esac
+          shared_flag='-shared'
+	  if test "$aix_use_runtimelinking" = yes; then
+	    shared_flag="$shared_flag "'${wl}-G'
+	  fi
+        else
+          # not using gcc
+          if test "$host_cpu" = ia64; then
+	  # VisualAge C++, Version 5.5 for AIX 5L for IA-64, Beta 3 Release
+	  # chokes on -Wl,-G. The following line is correct:
+	  shared_flag='-G'
+          else
+	    if test "$aix_use_runtimelinking" = yes; then
+	      shared_flag='${wl}-G'
+	    else
+	      shared_flag='${wl}-bM:SRE'
+	    fi
+          fi
+        fi
+
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-bexpall'
+        # It seems that -bexpall does not export symbols beginning with
+        # underscore (_), so it is better to generate a list of symbols to
+	# export.
+        _LT_TAGVAR(always_export_symbols, $1)=yes
+        if test "$aix_use_runtimelinking" = yes; then
+          # Warning - without using the other runtime loading flags (-brtl),
+          # -berok will link without error, but may produce a broken library.
+          _LT_TAGVAR(allow_undefined_flag, $1)='-berok'
+          # Determine the default libpath from the value encoded in an empty
+          # executable.
+          _LT_SYS_MODULE_PATH_AIX
+          _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath"
+
+          _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags `if test "x${allow_undefined_flag}" != "x"; then $ECHO "X${wl}${allow_undefined_flag}" | $Xsed; else :; fi` '"\${wl}$exp_sym_flag:\$export_symbols $shared_flag"
+        else
+          if test "$host_cpu" = ia64; then
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $libdir:/usr/lib:/lib'
+	    _LT_TAGVAR(allow_undefined_flag, $1)="-z nodefs"
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs '"\${wl}$no_entry_flag"' $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$exp_sym_flag:\$export_symbols"
+          else
+	    # Determine the default libpath from the value encoded in an
+	    # empty executable.
+	    _LT_SYS_MODULE_PATH_AIX
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-blibpath:$libdir:'"$aix_libpath"
+	    # Warning - without using the other run time loading flags,
+	    # -berok will link without error, but may produce a broken library.
+	    _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-bernotok'
+	    _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-berok'
+	    # Exported symbols can be pulled into shared objects from archives
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='$convenience'
+	    _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+	    # This is similar to how AIX traditionally builds its shared
+	    # libraries.
+	    _LT_TAGVAR(archive_expsym_cmds, $1)="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs ${wl}-bnoentry $compiler_flags ${wl}-bE:$export_symbols${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname'
+          fi
+        fi
+        ;;
+
+      beos*)
+	if $LD --help 2>&1 | $GREP ': supported targets:.* elf' > /dev/null; then
+	  _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+	  # Joseph Beckenbach <jrb3@best.com> says some releases of gcc
+	  # support --undefined.  This deserves some investigation.  FIXME
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	else
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	fi
+	;;
+
+      chorus*)
+        case $cc_basename in
+          *)
+	  # FIXME: insert proper C++ library support
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	  ;;
+        esac
+        ;;
+
+      cygwin* | mingw* | pw32* | cegcc*)
+        # _LT_TAGVAR(hardcode_libdir_flag_spec, $1) is actually meaningless,
+        # as there is no search path for DLLs.
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-L$libdir'
+        _LT_TAGVAR(allow_undefined_flag, $1)=unsupported
+        _LT_TAGVAR(always_export_symbols, $1)=no
+        _LT_TAGVAR(enable_shared_with_static_runtimes, $1)=yes
+
+        if $LD --help 2>&1 | $GREP 'auto-import' > /dev/null; then
+          _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+          # If the export-symbols file already is a .def file (1st line
+          # is EXPORTS), use it as is; otherwise, prepend...
+          _LT_TAGVAR(archive_expsym_cmds, $1)='if test "x`$SED 1q $export_symbols`" = xEXPORTS; then
+	    cp $export_symbols $output_objdir/$soname.def;
+          else
+	    echo EXPORTS > $output_objdir/$soname.def;
+	    cat $export_symbols >> $output_objdir/$soname.def;
+          fi~
+          $CC -shared -nostdlib $output_objdir/$soname.def $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $output_objdir/$soname ${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker $lib'
+        else
+          _LT_TAGVAR(ld_shlibs, $1)=no
+        fi
+        ;;
+      darwin* | rhapsody*)
+        _LT_DARWIN_LINKER_FEATURES($1)
+	;;
+
+      dgux*)
+        case $cc_basename in
+          ec++*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          ghcx*)
+	    # Green Hills C++ Compiler
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      freebsd[[12]]*)
+        # C++ shared libraries reported to be fairly broken before
+	# switch to ELF
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      freebsd-elf*)
+        _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+        ;;
+
+      freebsd* | dragonfly*)
+        # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF
+        # conventions
+        _LT_TAGVAR(ld_shlibs, $1)=yes
+        ;;
+
+      gnu*)
+        ;;
+
+      hpux9*)
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir'
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+        _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+        _LT_TAGVAR(hardcode_direct, $1)=yes
+        _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH,
+				             # but as the default
+				             # location of the library.
+
+        case $cc_basename in
+          CC*)
+            # FIXME: insert proper C++ library support
+            _LT_TAGVAR(ld_shlibs, $1)=no
+            ;;
+          aCC*)
+            _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -b ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+            # Commands to make compiler produce verbose output that lists
+            # what "hidden" libraries, object files and flags are used when
+            # linking a shared library.
+            #
+            # There doesn't appear to be a way to prevent this compiler from
+            # explicitly linking system object files so we need to strip them
+            # from the output so that they don't get included in the library
+            # dependencies.
+            output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $EGREP "\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; $ECHO "X$list" | $Xsed'
+            ;;
+          *)
+            if test "$GXX" = yes; then
+              _LT_TAGVAR(archive_cmds, $1)='$RM $output_objdir/$soname~$CC -shared -nostdlib -fPIC ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib'
+            else
+              # FIXME: insert proper C++ library support
+              _LT_TAGVAR(ld_shlibs, $1)=no
+            fi
+            ;;
+        esac
+        ;;
+
+      hpux10*|hpux11*)
+        if test $with_gnu_ld = no; then
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}+b ${wl}$libdir'
+	  _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+          case $host_cpu in
+            hppa*64*|ia64*)
+              ;;
+            *)
+	      _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+              ;;
+          esac
+        fi
+        case $host_cpu in
+          hppa*64*|ia64*)
+            _LT_TAGVAR(hardcode_direct, $1)=no
+            _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+            ;;
+          *)
+            _LT_TAGVAR(hardcode_direct, $1)=yes
+            _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+            _LT_TAGVAR(hardcode_minus_L, $1)=yes # Not in the search PATH,
+					         # but as the default
+					         # location of the library.
+            ;;
+        esac
+
+        case $cc_basename in
+          CC*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          aCC*)
+	    case $host_cpu in
+	      hppa*64*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      ia64*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	      *)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	        ;;
+	    esac
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | $GREP "\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; $ECHO "X$list" | $Xsed'
+	    ;;
+          *)
+	    if test "$GXX" = yes; then
+	      if test $with_gnu_ld = no; then
+	        case $host_cpu in
+	          hppa*64*)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib -fPIC ${wl}+h ${wl}$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          ia64*)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib -fPIC ${wl}+h ${wl}$soname ${wl}+nodefaultrpath -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	          *)
+	            _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	            ;;
+	        esac
+	      fi
+	    else
+	      # FIXME: insert proper C++ library support
+	      _LT_TAGVAR(ld_shlibs, $1)=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      interix[[3-9]]*)
+	_LT_TAGVAR(hardcode_direct, $1)=no
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+	# Hack: On Interix 3.x, we cannot compile PIC because of a broken gcc.
+	# Instead, shared libraries are loaded at an image base (0x10000000 by
+	# default) and relocated if they conflict, which is a slow very memory
+	# consuming and fragmenting process.  To avoid this, we pick a random,
+	# 256 KiB-aligned image base between 0x50000000 and 0x6FFC0000 at link
+	# time.  Moving up from 0x10000000 also allows more sbrk(2) space.
+	_LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	_LT_TAGVAR(archive_expsym_cmds, $1)='sed "s,^,_," $export_symbols >$output_objdir/$soname.expsym~$CC -shared $pic_flag $libobjs $deplibs $compiler_flags ${wl}-h,$soname ${wl}--retain-symbols-file,$output_objdir/$soname.expsym ${wl}--image-base,`expr ${RANDOM-$$} % 4096 / 2 \* 262144 + 1342177280` -o $lib'
+	;;
+      irix5* | irix6*)
+        case $cc_basename in
+          CC*)
+	    # SGI C++
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared -all -multigot $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -ar", where "CC" is the IRIX C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -ar -WR,-u -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    if test "$GXX" = yes; then
+	      if test "$with_gnu_ld" = no; then
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+	      else
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` -o $lib'
+	      fi
+	    fi
+	    _LT_TAGVAR(link_all_deplibs, $1)=yes
+	    ;;
+        esac
+        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+        _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+        _LT_TAGVAR(inherit_rpath, $1)=yes
+        ;;
+
+      linux* | k*bsd*-gnu | kopensolaris*-gnu)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo $lib | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib ${wl}-retain-symbols-file,$export_symbols; mv \$templib $lib'
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1 | $GREP "ld"`; rm -f libconftest$shared_ext; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; $ECHO "X$list" | $Xsed'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -Bstatic", where "CC" is the KAI C++ compiler.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs'
+	    ;;
+	  icpc* | ecpc* )
+	    # Intel C++
+	    with_gnu_ld=yes
+	    # version 8.0 and above of icpc choke on multiply defined symbols
+	    # if we add $predep_objects and $postdep_objects, however 7.1 and
+	    # earlier do not add the objects themselves.
+	    case `$CC -V 2>&1` in
+	      *"Version 7."*)
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
+		_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	      *)  # Version 8.0 or newer
+	        tmp_idyn=
+	        case $host_cpu in
+		  ia64*) tmp_idyn=' -i_dynamic';;
+		esac
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+		_LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared'"$tmp_idyn"' $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
+		;;
+	    esac
+	    _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive$convenience ${wl}--no-whole-archive'
+	    ;;
+          pgCC* | pgcpp*)
+            # Portland Group C++ compiler
+	    case `$CC -V` in
+	    *pgCC\ [[1-5]]* | *pgcpp\ [[1-5]]*)
+	      _LT_TAGVAR(prelink_cmds, $1)='tpldir=Template.dir~
+		rm -rf $tpldir~
+		$CC --prelink_objects --instantiation_dir $tpldir $objs $libobjs $compile_deplibs~
+		compile_command="$compile_command `find $tpldir -name \*.o | $NL2SP`"'
+	      _LT_TAGVAR(old_archive_cmds, $1)='tpldir=Template.dir~
+		rm -rf $tpldir~
+		$CC --prelink_objects --instantiation_dir $tpldir $oldobjs$old_deplibs~
+		$AR $AR_FLAGS $oldlib$oldobjs$old_deplibs `find $tpldir -name \*.o | $NL2SP`~
+		$RANLIB $oldlib'
+	      _LT_TAGVAR(archive_cmds, $1)='tpldir=Template.dir~
+		rm -rf $tpldir~
+		$CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+		$CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | $NL2SP` $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname -o $lib'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='tpldir=Template.dir~
+		rm -rf $tpldir~
+		$CC --prelink_objects --instantiation_dir $tpldir $predep_objects $libobjs $deplibs $convenience $postdep_objects~
+		$CC -shared $pic_flag $predep_objects $libobjs $deplibs `find $tpldir -name \*.o | $NL2SP` $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols -o $lib'
+	      ;;
+	    *) # Version 6 will use weak symbols
+	      _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname -o $lib'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname ${wl}-retain-symbols-file ${wl}$export_symbols -o $lib'
+	      ;;
+	    esac
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}--rpath ${wl}$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`for conv in $convenience\"\"; do test  -n \"$conv\" && new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+            ;;
+	  cxx*)
+	    # Compaq C++
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname  -o $lib ${wl}-retain-symbols-file $wl$export_symbols'
+
+	    runpath_var=LD_RUN_PATH
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld"`; templist=`$ECHO "X$templist" | $Xsed -e "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; $ECHO "X$list" | $Xsed'
+	    ;;
+	  xl*)
+	    # IBM XL 8.0 on PPC, with GNU ld
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}--export-dynamic'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -qmkshrobj $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+	    if test "x$supports_anon_versioning" = xyes; then
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $output_objdir/$libname.ver~
+		cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+		echo "local: *; };" >> $output_objdir/$libname.ver~
+		$CC -qmkshrobj $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'
+	    fi
+	    ;;
+	  *)
+	    case `$CC -V 2>&1 | sed 5q` in
+	    *Sun\ C*)
+	      # Sun C++ 5.9
+	      _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs'
+	      _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag} -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	      _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G${allow_undefined_flag} -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-retain-symbols-file ${wl}$export_symbols'
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	      _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}--whole-archive`new_convenience=; for conv in $convenience\"\"; do test -z \"$conv\" || new_convenience=\"$new_convenience,$conv\"; done; $ECHO \"$new_convenience\"` ${wl}--no-whole-archive'
+	      _LT_TAGVAR(compiler_needs_object, $1)=yes
+
+	      # Not sure whether something based on
+	      # $CC $CFLAGS -v conftest.$objext -o libconftest$shared_ext 2>&1
+	      # would be better.
+	      output_verbose_link_cmd='echo'
+
+	      # Archives containing C++ object files must be created using
+	      # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	      # necessary to make sure instantiated templates are included
+	      # in the archive.
+	      _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs'
+	      ;;
+	    esac
+	    ;;
+	esac
+	;;
+
+      lynxos*)
+        # FIXME: insert proper C++ library support
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	;;
+
+      m88k*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+	;;
+
+      mvs*)
+        case $cc_basename in
+          cxx*)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+	  *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+	esac
+	;;
+
+      netbsd*)
+        if echo __ELF__ | $CC -E - | $GREP __ELF__ >/dev/null; then
+	  _LT_TAGVAR(archive_cmds, $1)='$LD -Bshareable  -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags'
+	  wlarc=
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	fi
+	# Workaround some broken pre-1.5 toolchains
+	output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP conftest.$objext | $SED -e "s:-lgcc -lc -lgcc::"'
+	;;
+
+      *nto* | *qnx*)
+        _LT_TAGVAR(ld_shlibs, $1)=yes
+	;;
+
+      openbsd2*)
+        # C++ shared libraries are fairly broken
+	_LT_TAGVAR(ld_shlibs, $1)=no
+	;;
+
+      openbsd*)
+	if test -f /usr/libexec/ld.so; then
+	  _LT_TAGVAR(hardcode_direct, $1)=yes
+	  _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	  _LT_TAGVAR(hardcode_direct_absolute, $1)=yes
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
+	  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	  if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared $pic_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-retain-symbols-file,$export_symbols -o $lib'
+	    _LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-E'
+	    _LT_TAGVAR(whole_archive_flag_spec, $1)="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
+	  fi
+	  output_verbose_link_cmd=echo
+	else
+	  _LT_TAGVAR(ld_shlibs, $1)=no
+	fi
+	;;
+
+      osf3* | osf4* | osf5*)
+        case $cc_basename in
+          KCC*)
+	    # Kuck and Associates, Inc. (KAI) C++ Compiler
+
+	    # KCC will only create a shared library if the output file
+	    # ends with ".so" (or ".sl" for HP-UX), so rename the library
+	    # to its proper name (with version) after linking.
+	    _LT_TAGVAR(archive_cmds, $1)='tempext=`echo $shared_ext | $SED -e '\''s/\([[^()0-9A-Za-z{}]]\)/\\\\\1/g'\''`; templib=`echo "$lib" | $SED -e "s/\${tempext}\..*/.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath,$libdir'
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Archives containing C++ object files must be created using
+	    # the KAI C++ compiler.
+	    case $host in
+	      osf3*) _LT_TAGVAR(old_archive_cmds, $1)='$CC -Bstatic -o $oldlib $oldobjs' ;;
+	      *) _LT_TAGVAR(old_archive_cmds, $1)='$CC -o $oldlib $oldobjs' ;;
+	    esac
+	    ;;
+          RCC*)
+	    # Rational C++ 2.4.1
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          cxx*)
+	    case $host in
+	      osf3*)
+	        _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*'
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $soname `test -n "$verstring" && $ECHO "X${wl}-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+		;;
+	      *)
+	        _LT_TAGVAR(allow_undefined_flag, $1)=' -expect_unresolved \*'
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='for i in `cat $export_symbols`; do printf "%s %s\\n" -exported_symbol "\$i" >> $lib.exp; done~
+	          echo "-hidden">> $lib.exp~
+	          $CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname ${wl}-input ${wl}$lib.exp  `test -n "$verstring" && $ECHO "X-set_version $verstring" | $Xsed` -update_registry ${output_objdir}/so_locations -o $lib~
+	          $RM $lib.exp'
+	        _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-rpath $libdir'
+		;;
+	    esac
+
+	    _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	    # Commands to make compiler produce verbose output that lists
+	    # what "hidden" libraries, object files and flags are used when
+	    # linking a shared library.
+	    #
+	    # There doesn't appear to be a way to prevent this compiler from
+	    # explicitly linking system object files so we need to strip them
+	    # from the output so that they don't get included in the library
+	    # dependencies.
+	    output_verbose_link_cmd='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "ld" | $GREP -v "ld:"`; templist=`$ECHO "X$templist" | $Xsed -e "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; $ECHO "X$list" | $Xsed'
+	    ;;
+	  *)
+	    if test "$GXX" = yes && test "$with_gnu_ld" = no; then
+	      _LT_TAGVAR(allow_undefined_flag, $1)=' ${wl}-expect_unresolved ${wl}\*'
+	      case $host in
+	        osf3*)
+	          _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "X${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+		  ;;
+	        *)
+	          _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && $ECHO "${wl}-set_version ${wl}$verstring" | $Xsed` ${wl}-update_registry ${wl}${output_objdir}/so_locations -o $lib'
+		  ;;
+	      esac
+
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-rpath ${wl}$libdir'
+	      _LT_TAGVAR(hardcode_libdir_separator, $1)=:
+
+	      # Commands to make compiler produce verbose output that lists
+	      # what "hidden" libraries, object files and flags are used when
+	      # linking a shared library.
+	      output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "\-L"'
+
+	    else
+	      # FIXME: insert proper C++ library support
+	      _LT_TAGVAR(ld_shlibs, $1)=no
+	    fi
+	    ;;
+        esac
+        ;;
+
+      psos*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      sunos4*)
+        case $cc_basename in
+          CC*)
+	    # Sun C++ 4.x
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          lcc*)
+	    # Lucid
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      solaris*)
+        case $cc_basename in
+          CC*)
+	    # Sun C++ 4.2, 5.x and Centerline C++
+            _LT_TAGVAR(archive_cmds_need_lc,$1)=yes
+	    _LT_TAGVAR(no_undefined_flag, $1)=' -zdefs'
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -G${allow_undefined_flag}  -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+	      $CC -G${allow_undefined_flag} ${wl}-M ${wl}$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	    _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='-R$libdir'
+	    _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	    case $host_os in
+	      solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+	      *)
+		# The compiler driver will combine and reorder linker options,
+		# but understands `-z linker_flag'.
+	        # Supported since Solaris 2.6 (maybe 2.5.1?)
+		_LT_TAGVAR(whole_archive_flag_spec, $1)='-z allextract$convenience -z defaultextract'
+	        ;;
+	    esac
+	    _LT_TAGVAR(link_all_deplibs, $1)=yes
+
+	    output_verbose_link_cmd='echo'
+
+	    # Archives containing C++ object files must be created using
+	    # "CC -xar", where "CC" is the Sun C++ compiler.  This is
+	    # necessary to make sure instantiated templates are included
+	    # in the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC -xar -o $oldlib $oldobjs'
+	    ;;
+          gcx*)
+	    # Green Hills C++ Compiler
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
+
+	    # The C++ compiler must be used to create the archive.
+	    _LT_TAGVAR(old_archive_cmds, $1)='$CC $LDFLAGS -archive -o $oldlib $oldobjs'
+	    ;;
+          *)
+	    # GNU C++ compiler with Solaris linker
+	    if test "$GXX" = yes && test "$with_gnu_ld" = no; then
+	      _LT_TAGVAR(no_undefined_flag, $1)=' ${wl}-z ${wl}defs'
+	      if $CC --version | $GREP -v '^2\.7' > /dev/null; then
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -shared -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+		  $CC -shared -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | $GREP "\-L"'
+	      else
+	        # g++ 2.7 appears to require `-G' NOT `-shared' on this
+	        # platform.
+	        _LT_TAGVAR(archive_cmds, $1)='$CC -G -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
+	        _LT_TAGVAR(archive_expsym_cmds, $1)='echo "{ global:" > $lib.exp~cat $export_symbols | $SED -e "s/\(.*\)/\1;/" >> $lib.exp~echo "local: *; };" >> $lib.exp~
+		  $CC -G -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$RM $lib.exp'
+
+	        # Commands to make compiler produce verbose output that lists
+	        # what "hidden" libraries, object files and flags are used when
+	        # linking a shared library.
+	        output_verbose_link_cmd='$CC -G $CFLAGS -v conftest.$objext 2>&1 | $GREP "\-L"'
+	      fi
+
+	      _LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R $wl$libdir'
+	      case $host_os in
+		solaris2.[[0-5]] | solaris2.[[0-5]].*) ;;
+		*)
+		  _LT_TAGVAR(whole_archive_flag_spec, $1)='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract'
+		  ;;
+	      esac
+	    fi
+	    ;;
+        esac
+        ;;
+
+    sysv4*uw2* | sysv5OpenUNIX* | sysv5UnixWare7.[[01]].[[10]]* | unixware7* | sco3.2v5.0.[[024]]*)
+      _LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text'
+      _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+      _LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+      runpath_var='LD_RUN_PATH'
+
+      case $cc_basename in
+        CC*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+	*)
+	  _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	  ;;
+      esac
+      ;;
+
+      sysv5* | sco3.2v5* | sco5v6*)
+	# Note: We can NOT use -z defs as we might desire, because we do not
+	# link with -lc, and that would cause any symbols used from libc to
+	# always be unresolved, which means just about no library would
+	# ever link correctly.  If we're not using GNU ld we use -z text
+	# though, which does catch some bad symbols but isn't as heavy-handed
+	# as -z defs.
+	_LT_TAGVAR(no_undefined_flag, $1)='${wl}-z,text'
+	_LT_TAGVAR(allow_undefined_flag, $1)='${wl}-z,nodefs'
+	_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+	_LT_TAGVAR(hardcode_shlibpath_var, $1)=no
+	_LT_TAGVAR(hardcode_libdir_flag_spec, $1)='${wl}-R,$libdir'
+	_LT_TAGVAR(hardcode_libdir_separator, $1)=':'
+	_LT_TAGVAR(link_all_deplibs, $1)=yes
+	_LT_TAGVAR(export_dynamic_flag_spec, $1)='${wl}-Bexport'
+	runpath_var='LD_RUN_PATH'
+
+	case $cc_basename in
+          CC*)
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -G ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -G ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    ;;
+	  *)
+	    _LT_TAGVAR(archive_cmds, $1)='$CC -shared ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    _LT_TAGVAR(archive_expsym_cmds, $1)='$CC -shared ${wl}-Bexport:$export_symbols ${wl}-h,$soname -o $lib $libobjs $deplibs $compiler_flags'
+	    ;;
+	esac
+      ;;
+
+      tandem*)
+        case $cc_basename in
+          NCC*)
+	    # NonStop-UX NCC 3.20
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+          *)
+	    # FIXME: insert proper C++ library support
+	    _LT_TAGVAR(ld_shlibs, $1)=no
+	    ;;
+        esac
+        ;;
+
+      vxworks*)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+
+      *)
+        # FIXME: insert proper C++ library support
+        _LT_TAGVAR(ld_shlibs, $1)=no
+        ;;
+    esac
+
+    AC_MSG_RESULT([$_LT_TAGVAR(ld_shlibs, $1)])
+    test "$_LT_TAGVAR(ld_shlibs, $1)" = no && can_build_shared=no
+
+    _LT_TAGVAR(GCC, $1)="$GXX"
+    _LT_TAGVAR(LD, $1)="$LD"
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_SYS_HIDDEN_LIBDEPS($1)
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  CC=$lt_save_CC
+  LDCXX=$LD
+  LD=$lt_save_LD
+  GCC=$lt_save_GCC
+  with_gnu_ld=$lt_save_with_gnu_ld
+  lt_cv_path_LDCXX=$lt_cv_path_LD
+  lt_cv_path_LD=$lt_save_path_LD
+  lt_cv_prog_gnu_ldcxx=$lt_cv_prog_gnu_ld
+  lt_cv_prog_gnu_ld=$lt_save_with_gnu_ld
+fi # test "$_lt_caught_CXX_error" != yes
+
+AC_LANG_POP
+])# _LT_LANG_CXX_CONFIG
+
+
+# _LT_SYS_HIDDEN_LIBDEPS([TAGNAME])
+# ---------------------------------
+# Figure out "hidden" library dependencies from verbose
+# compiler output when linking a shared library.
+# Parse the compiler output and extract the necessary
+# objects, libraries and library flags.
+m4_defun([_LT_SYS_HIDDEN_LIBDEPS],
+[m4_require([_LT_FILEUTILS_DEFAULTS])dnl
+# Dependencies to place before and after the object being linked:
+_LT_TAGVAR(predep_objects, $1)=
+_LT_TAGVAR(postdep_objects, $1)=
+_LT_TAGVAR(predeps, $1)=
+_LT_TAGVAR(postdeps, $1)=
+_LT_TAGVAR(compiler_lib_search_path, $1)=
+
+dnl we can't use the lt_simple_compile_test_code here,
+dnl because it contains code intended for an executable,
+dnl not a library.  It's possible we should let each
+dnl tag define a new lt_????_link_test_code variable,
+dnl but it's only used here...
+m4_if([$1], [], [cat > conftest.$ac_ext <<_LT_EOF
+int a;
+void foo (void) { a = 0; }
+_LT_EOF
+], [$1], [CXX], [cat > conftest.$ac_ext <<_LT_EOF
+class Foo
+{
+public:
+  Foo (void) { a = 0; }
+private:
+  int a;
+};
+_LT_EOF
+], [$1], [F77], [cat > conftest.$ac_ext <<_LT_EOF
+      subroutine foo
+      implicit none
+      integer*4 a
+      a=0
+      return
+      end
+_LT_EOF
+], [$1], [FC], [cat > conftest.$ac_ext <<_LT_EOF
+      subroutine foo
+      implicit none
+      integer a
+      a=0
+      return
+      end
+_LT_EOF
+], [$1], [GCJ], [cat > conftest.$ac_ext <<_LT_EOF
+public class foo {
+  private int a;
+  public void bar (void) {
+    a = 0;
+  }
+};
+_LT_EOF
+])
+dnl Parse the compiler output and extract the necessary
+dnl objects, libraries and library flags.
+if AC_TRY_EVAL(ac_compile); then
+  # Parse the compiler output and extract the necessary
+  # objects, libraries and library flags.
+
+  # Sentinel used to keep track of whether or not we are before
+  # the conftest object file.
+  pre_test_object_deps_done=no
+
+  for p in `eval "$output_verbose_link_cmd"`; do
+    case $p in
+
+    -L* | -R* | -l*)
+       # Some compilers place space between "-{L,R}" and the path.
+       # Remove the space.
+       if test $p = "-L" ||
+          test $p = "-R"; then
+	 prev=$p
+	 continue
+       else
+	 prev=
+       fi
+
+       if test "$pre_test_object_deps_done" = no; then
+	 case $p in
+	 -L* | -R*)
+	   # Internal compiler library paths should come after those
+	   # provided the user.  The postdeps already come after the
+	   # user supplied libs so there is no need to process them.
+	   if test -z "$_LT_TAGVAR(compiler_lib_search_path, $1)"; then
+	     _LT_TAGVAR(compiler_lib_search_path, $1)="${prev}${p}"
+	   else
+	     _LT_TAGVAR(compiler_lib_search_path, $1)="${_LT_TAGVAR(compiler_lib_search_path, $1)} ${prev}${p}"
+	   fi
+	   ;;
+	 # The "-l" case would never come before the object being
+	 # linked, so don't bother handling this case.
+	 esac
+       else
+	 if test -z "$_LT_TAGVAR(postdeps, $1)"; then
+	   _LT_TAGVAR(postdeps, $1)="${prev}${p}"
+	 else
+	   _LT_TAGVAR(postdeps, $1)="${_LT_TAGVAR(postdeps, $1)} ${prev}${p}"
+	 fi
+       fi
+       ;;
+
+    *.$objext)
+       # This assumes that the test object file only shows up
+       # once in the compiler output.
+       if test "$p" = "conftest.$objext"; then
+	 pre_test_object_deps_done=yes
+	 continue
+       fi
+
+       if test "$pre_test_object_deps_done" = no; then
+	 if test -z "$_LT_TAGVAR(predep_objects, $1)"; then
+	   _LT_TAGVAR(predep_objects, $1)="$p"
+	 else
+	   _LT_TAGVAR(predep_objects, $1)="$_LT_TAGVAR(predep_objects, $1) $p"
+	 fi
+       else
+	 if test -z "$_LT_TAGVAR(postdep_objects, $1)"; then
+	   _LT_TAGVAR(postdep_objects, $1)="$p"
+	 else
+	   _LT_TAGVAR(postdep_objects, $1)="$_LT_TAGVAR(postdep_objects, $1) $p"
+	 fi
+       fi
+       ;;
+
+    *) ;; # Ignore the rest.
+
+    esac
+  done
+
+  # Clean up.
+  rm -f a.out a.exe
+else
+  echo "libtool.m4: error: problem compiling $1 test program"
+fi
+
+$RM -f confest.$objext
+
+# PORTME: override above test on systems where it is broken
+m4_if([$1], [CXX],
+[case $host_os in
+interix[[3-9]]*)
+  # Interix 3.5 installs completely hosed .la files for C++, so rather than
+  # hack all around it, let's just trust "g++" to DTRT.
+  _LT_TAGVAR(predep_objects,$1)=
+  _LT_TAGVAR(postdep_objects,$1)=
+  _LT_TAGVAR(postdeps,$1)=
+  ;;
+
+linux*)
+  case `$CC -V 2>&1 | sed 5q` in
+  *Sun\ C*)
+    # Sun C++ 5.9
+
+    # The more standards-conforming stlport4 library is
+    # incompatible with the Cstd library. Avoid specifying
+    # it if it's in CXXFLAGS. Ignore libCrun as
+    # -library=stlport4 depends on it.
+    case " $CXX $CXXFLAGS " in
+    *" -library=stlport4 "*)
+      solaris_use_stlport4=yes
+      ;;
+    esac
+
+    if test "$solaris_use_stlport4" != yes; then
+      _LT_TAGVAR(postdeps,$1)='-library=Cstd -library=Crun'
+    fi
+    ;;
+  esac
+  ;;
+
+solaris*)
+  case $cc_basename in
+  CC*)
+    # The more standards-conforming stlport4 library is
+    # incompatible with the Cstd library. Avoid specifying
+    # it if it's in CXXFLAGS. Ignore libCrun as
+    # -library=stlport4 depends on it.
+    case " $CXX $CXXFLAGS " in
+    *" -library=stlport4 "*)
+      solaris_use_stlport4=yes
+      ;;
+    esac
+
+    # Adding this requires a known-good setup of shared libraries for
+    # Sun compiler versions before 5.6, else PIC objects from an old
+    # archive will be linked into the output, leading to subtle bugs.
+    if test "$solaris_use_stlport4" != yes; then
+      _LT_TAGVAR(postdeps,$1)='-library=Cstd -library=Crun'
+    fi
+    ;;
+  esac
+  ;;
+esac
+])
+
+case " $_LT_TAGVAR(postdeps, $1) " in
+*" -lc "*) _LT_TAGVAR(archive_cmds_need_lc, $1)=no ;;
+esac
+ _LT_TAGVAR(compiler_lib_search_dirs, $1)=
+if test -n "${_LT_TAGVAR(compiler_lib_search_path, $1)}"; then
+ _LT_TAGVAR(compiler_lib_search_dirs, $1)=`echo " ${_LT_TAGVAR(compiler_lib_search_path, $1)}" | ${SED} -e 's! -L! !g' -e 's!^ !!'`
+fi
+_LT_TAGDECL([], [compiler_lib_search_dirs], [1],
+    [The directories searched by this compiler when creating a shared library])
+_LT_TAGDECL([], [predep_objects], [1],
+    [Dependencies to place before and after the objects being linked to
+    create a shared library])
+_LT_TAGDECL([], [postdep_objects], [1])
+_LT_TAGDECL([], [predeps], [1])
+_LT_TAGDECL([], [postdeps], [1])
+_LT_TAGDECL([], [compiler_lib_search_path], [1],
+    [The library search path used internally by the compiler when linking
+    a shared library])
+])# _LT_SYS_HIDDEN_LIBDEPS
+
+
+# _LT_PROG_F77
+# ------------
+# Since AC_PROG_F77 is broken, in that it returns the empty string
+# if there is no fortran compiler, we have our own version here.
+m4_defun([_LT_PROG_F77],
+[
+pushdef([AC_MSG_ERROR], [_lt_disable_F77=yes])
+AC_PROG_F77
+if test -z "$F77" || test "X$F77" = "Xno"; then
+  _lt_disable_F77=yes
+fi
+popdef([AC_MSG_ERROR])
+])# _LT_PROG_F77
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([_LT_PROG_F77], [])
+
+
+# _LT_LANG_F77_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for a Fortran 77 compiler are
+# suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_F77_CONFIG],
+[AC_REQUIRE([_LT_PROG_F77])dnl
+AC_LANG_PUSH(Fortran 77)
+
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for f77 test sources.
+ac_ext=f
+
+# Object file extension for compiled f77 test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the F77 compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test "$_lt_disable_F77" != yes; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="\
+      subroutine t
+      return
+      end
+"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code="\
+      program t
+      end
+"
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC="$CC"
+  lt_save_GCC=$GCC
+  CC=${F77-"f77"}
+  compiler=$CC
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+  GCC=$G77
+  if test -n "$compiler"; then
+    AC_MSG_CHECKING([if libtool supports shared libraries])
+    AC_MSG_RESULT([$can_build_shared])
+
+    AC_MSG_CHECKING([whether to build shared libraries])
+    test "$can_build_shared" = "no" && enable_shared=no
+
+    # On AIX, shared libraries and static libraries use the same namespace, and
+    # are all built from PIC.
+    case $host_os in
+      aix3*)
+        test "$enable_shared" = yes && enable_static=no
+        if test -n "$RANLIB"; then
+          archive_cmds="$archive_cmds~\$RANLIB \$lib"
+          postinstall_cmds='$RANLIB $lib'
+        fi
+        ;;
+      aix[[4-9]]*)
+	if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
+	  test "$enable_shared" = yes && enable_static=no
+	fi
+        ;;
+    esac
+    AC_MSG_RESULT([$enable_shared])
+
+    AC_MSG_CHECKING([whether to build static libraries])
+    # Make sure either enable_shared or enable_static is yes.
+    test "$enable_shared" = yes || enable_static=yes
+    AC_MSG_RESULT([$enable_static])
+
+    _LT_TAGVAR(GCC, $1)="$G77"
+    _LT_TAGVAR(LD, $1)="$LD"
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  GCC=$lt_save_GCC
+  CC="$lt_save_CC"
+fi # test "$_lt_disable_F77" != yes
+
+AC_LANG_POP
+])# _LT_LANG_F77_CONFIG
+
+
+# _LT_PROG_FC
+# -----------
+# Since AC_PROG_FC is broken, in that it returns the empty string
+# if there is no fortran compiler, we have our own version here.
+m4_defun([_LT_PROG_FC],
+[
+pushdef([AC_MSG_ERROR], [_lt_disable_FC=yes])
+AC_PROG_FC
+if test -z "$FC" || test "X$FC" = "Xno"; then
+  _lt_disable_FC=yes
+fi
+popdef([AC_MSG_ERROR])
+])# _LT_PROG_FC
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([_LT_PROG_FC], [])
+
+
+# _LT_LANG_FC_CONFIG([TAG])
+# -------------------------
+# Ensure that the configuration variables for a Fortran compiler are
+# suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_FC_CONFIG],
+[AC_REQUIRE([_LT_PROG_FC])dnl
+AC_LANG_PUSH(Fortran)
+
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+_LT_TAGVAR(allow_undefined_flag, $1)=
+_LT_TAGVAR(always_export_symbols, $1)=no
+_LT_TAGVAR(archive_expsym_cmds, $1)=
+_LT_TAGVAR(export_dynamic_flag_spec, $1)=
+_LT_TAGVAR(hardcode_direct, $1)=no
+_LT_TAGVAR(hardcode_direct_absolute, $1)=no
+_LT_TAGVAR(hardcode_libdir_flag_spec, $1)=
+_LT_TAGVAR(hardcode_libdir_flag_spec_ld, $1)=
+_LT_TAGVAR(hardcode_libdir_separator, $1)=
+_LT_TAGVAR(hardcode_minus_L, $1)=no
+_LT_TAGVAR(hardcode_automatic, $1)=no
+_LT_TAGVAR(inherit_rpath, $1)=no
+_LT_TAGVAR(module_cmds, $1)=
+_LT_TAGVAR(module_expsym_cmds, $1)=
+_LT_TAGVAR(link_all_deplibs, $1)=unknown
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+_LT_TAGVAR(no_undefined_flag, $1)=
+_LT_TAGVAR(whole_archive_flag_spec, $1)=
+_LT_TAGVAR(enable_shared_with_static_runtimes, $1)=no
+
+# Source file extension for fc test sources.
+ac_ext=${ac_fc_srcext-f}
+
+# Object file extension for compiled fc test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# No sense in running all these tests if we already determined that
+# the FC compiler isn't working.  Some variables (like enable_shared)
+# are currently assumed to apply to all compilers on this platform,
+# and will be corrupted by setting them based on a non-working compiler.
+if test "$_lt_disable_FC" != yes; then
+  # Code to be used in simple compile tests
+  lt_simple_compile_test_code="\
+      subroutine t
+      return
+      end
+"
+
+  # Code to be used in simple link tests
+  lt_simple_link_test_code="\
+      program t
+      end
+"
+
+  # ltmain only uses $CC for tagged configurations so make sure $CC is set.
+  _LT_TAG_COMPILER
+
+  # save warnings/boilerplate of simple test code
+  _LT_COMPILER_BOILERPLATE
+  _LT_LINKER_BOILERPLATE
+
+  # Allow CC to be a program name with arguments.
+  lt_save_CC="$CC"
+  lt_save_GCC=$GCC
+  CC=${FC-"f95"}
+  compiler=$CC
+  GCC=$ac_cv_fc_compiler_gnu
+
+  _LT_TAGVAR(compiler, $1)=$CC
+  _LT_CC_BASENAME([$compiler])
+
+  if test -n "$compiler"; then
+    AC_MSG_CHECKING([if libtool supports shared libraries])
+    AC_MSG_RESULT([$can_build_shared])
+
+    AC_MSG_CHECKING([whether to build shared libraries])
+    test "$can_build_shared" = "no" && enable_shared=no
+
+    # On AIX, shared libraries and static libraries use the same namespace, and
+    # are all built from PIC.
+    case $host_os in
+      aix3*)
+        test "$enable_shared" = yes && enable_static=no
+        if test -n "$RANLIB"; then
+          archive_cmds="$archive_cmds~\$RANLIB \$lib"
+          postinstall_cmds='$RANLIB $lib'
+        fi
+        ;;
+      aix[[4-9]]*)
+	if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
+	  test "$enable_shared" = yes && enable_static=no
+	fi
+        ;;
+    esac
+    AC_MSG_RESULT([$enable_shared])
+
+    AC_MSG_CHECKING([whether to build static libraries])
+    # Make sure either enable_shared or enable_static is yes.
+    test "$enable_shared" = yes || enable_static=yes
+    AC_MSG_RESULT([$enable_static])
+
+    _LT_TAGVAR(GCC, $1)="$ac_cv_fc_compiler_gnu"
+    _LT_TAGVAR(LD, $1)="$LD"
+
+    ## CAVEAT EMPTOR:
+    ## There is no encapsulation within the following macros, do not change
+    ## the running order or otherwise move them around unless you know exactly
+    ## what you are doing...
+    _LT_SYS_HIDDEN_LIBDEPS($1)
+    _LT_COMPILER_PIC($1)
+    _LT_COMPILER_C_O($1)
+    _LT_COMPILER_FILE_LOCKS($1)
+    _LT_LINKER_SHLIBS($1)
+    _LT_SYS_DYNAMIC_LINKER($1)
+    _LT_LINKER_HARDCODE_LIBPATH($1)
+
+    _LT_CONFIG($1)
+  fi # test -n "$compiler"
+
+  GCC=$lt_save_GCC
+  CC="$lt_save_CC"
+fi # test "$_lt_disable_FC" != yes
+
+AC_LANG_POP
+])# _LT_LANG_FC_CONFIG
+
+
+# _LT_LANG_GCJ_CONFIG([TAG])
+# --------------------------
+# Ensure that the configuration variables for the GNU Java Compiler compiler
+# are suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_GCJ_CONFIG],
+[AC_REQUIRE([LT_PROG_GCJ])dnl
+AC_LANG_SAVE
+
+# Source file extension for Java test sources.
+ac_ext=java
+
+# Object file extension for compiled Java test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code="class foo {}"
+
+# Code to be used in simple link tests
+lt_simple_link_test_code='public class conftest { public static void main(String[[]] argv) {}; }'
+
+# ltmain only uses $CC for tagged configurations so make sure $CC is set.
+_LT_TAG_COMPILER
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+# Allow CC to be a program name with arguments.
+lt_save_CC="$CC"
+lt_save_GCC=$GCC
+GCC=yes
+CC=${GCJ-"gcj"}
+compiler=$CC
+_LT_TAGVAR(compiler, $1)=$CC
+_LT_TAGVAR(LD, $1)="$LD"
+_LT_CC_BASENAME([$compiler])
+
+# GCJ did not exist at the time GCC didn't implicitly link libc in.
+_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+
+_LT_TAGVAR(old_archive_cmds, $1)=$old_archive_cmds
+
+## CAVEAT EMPTOR:
+## There is no encapsulation within the following macros, do not change
+## the running order or otherwise move them around unless you know exactly
+## what you are doing...
+if test -n "$compiler"; then
+  _LT_COMPILER_NO_RTTI($1)
+  _LT_COMPILER_PIC($1)
+  _LT_COMPILER_C_O($1)
+  _LT_COMPILER_FILE_LOCKS($1)
+  _LT_LINKER_SHLIBS($1)
+  _LT_LINKER_HARDCODE_LIBPATH($1)
+
+  _LT_CONFIG($1)
+fi
+
+AC_LANG_RESTORE
+
+GCC=$lt_save_GCC
+CC="$lt_save_CC"
+])# _LT_LANG_GCJ_CONFIG
+
+
+# _LT_LANG_RC_CONFIG([TAG])
+# -------------------------
+# Ensure that the configuration variables for the Windows resource compiler
+# are suitably defined.  These variables are subsequently used by _LT_CONFIG
+# to write the compiler configuration to `libtool'.
+m4_defun([_LT_LANG_RC_CONFIG],
+[AC_REQUIRE([LT_PROG_RC])dnl
+AC_LANG_SAVE
+
+# Source file extension for RC test sources.
+ac_ext=rc
+
+# Object file extension for compiled RC test sources.
+objext=o
+_LT_TAGVAR(objext, $1)=$objext
+
+# Code to be used in simple compile tests
+lt_simple_compile_test_code='sample MENU { MENUITEM "&Soup", 100, CHECKED }'
+
+# Code to be used in simple link tests
+lt_simple_link_test_code="$lt_simple_compile_test_code"
+
+# ltmain only uses $CC for tagged configurations so make sure $CC is set.
+_LT_TAG_COMPILER
+
+# save warnings/boilerplate of simple test code
+_LT_COMPILER_BOILERPLATE
+_LT_LINKER_BOILERPLATE
+
+# Allow CC to be a program name with arguments.
+lt_save_CC="$CC"
+lt_save_GCC=$GCC
+GCC=
+CC=${RC-"windres"}
+compiler=$CC
+_LT_TAGVAR(compiler, $1)=$CC
+_LT_CC_BASENAME([$compiler])
+_LT_TAGVAR(lt_cv_prog_compiler_c_o, $1)=yes
+
+if test -n "$compiler"; then
+  :
+  _LT_CONFIG($1)
+fi
+
+GCC=$lt_save_GCC
+AC_LANG_RESTORE
+CC="$lt_save_CC"
+])# _LT_LANG_RC_CONFIG
+
+
+# LT_PROG_GCJ
+# -----------
+AC_DEFUN([LT_PROG_GCJ],
+[m4_ifdef([AC_PROG_GCJ], [AC_PROG_GCJ],
+  [m4_ifdef([A][M_PROG_GCJ], [A][M_PROG_GCJ],
+    [AC_CHECK_TOOL(GCJ, gcj,)
+      test "x${GCJFLAGS+set}" = xset || GCJFLAGS="-g -O2"
+      AC_SUBST(GCJFLAGS)])])[]dnl
+])
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_GCJ], [LT_PROG_GCJ])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_GCJ], [])
+
+
+# LT_PROG_RC
+# ----------
+AC_DEFUN([LT_PROG_RC],
+[AC_CHECK_TOOL(RC, windres,)
+])
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_RC], [LT_PROG_RC])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_RC], [])
+
+
+# _LT_DECL_EGREP
+# --------------
+# If we don't have a new enough Autoconf to choose the best grep
+# available, choose the one first in the user's PATH.
+m4_defun([_LT_DECL_EGREP],
+[AC_REQUIRE([AC_PROG_EGREP])dnl
+AC_REQUIRE([AC_PROG_FGREP])dnl
+test -z "$GREP" && GREP=grep
+_LT_DECL([], [GREP], [1], [A grep program that handles long lines])
+_LT_DECL([], [EGREP], [1], [An ERE matcher])
+_LT_DECL([], [FGREP], [1], [A literal string matcher])
+dnl Non-bleeding-edge autoconf doesn't subst GREP, so do it here too
+AC_SUBST([GREP])
+])
+
+
+# _LT_DECL_OBJDUMP
+# --------------
+# If we don't have a new enough Autoconf to choose the best objdump
+# available, choose the one first in the user's PATH.
+m4_defun([_LT_DECL_OBJDUMP],
+[AC_CHECK_TOOL(OBJDUMP, objdump, false)
+test -z "$OBJDUMP" && OBJDUMP=objdump
+_LT_DECL([], [OBJDUMP], [1], [An object symbol dumper])
+AC_SUBST([OBJDUMP])
+])
+
+
+# _LT_DECL_SED
+# ------------
+# Check for a fully-functional sed program, that truncates
+# as few characters as possible.  Prefer GNU sed if found.
+m4_defun([_LT_DECL_SED],
+[AC_PROG_SED
+test -z "$SED" && SED=sed
+Xsed="$SED -e 1s/^X//"
+_LT_DECL([], [SED], [1], [A sed program that does not truncate output])
+_LT_DECL([], [Xsed], ["\$SED -e 1s/^X//"],
+    [Sed that helps us avoid accidentally triggering echo(1) options like -n])
+])# _LT_DECL_SED
+
+m4_ifndef([AC_PROG_SED], [
+############################################################
+# NOTE: This macro has been submitted for inclusion into   #
+#  GNU Autoconf as AC_PROG_SED.  When it is available in   #
+#  a released version of Autoconf we should remove this    #
+#  macro and use it instead.                               #
+############################################################
+
+m4_defun([AC_PROG_SED],
+[AC_MSG_CHECKING([for a sed that does not truncate output])
+AC_CACHE_VAL(lt_cv_path_SED,
+[# Loop through the user's path and test for sed and gsed.
+# Then use that list of sed's as ones to test for truncation.
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for lt_ac_prog in sed gsed; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      if $as_executable_p "$as_dir/$lt_ac_prog$ac_exec_ext"; then
+        lt_ac_sed_list="$lt_ac_sed_list $as_dir/$lt_ac_prog$ac_exec_ext"
+      fi
+    done
+  done
+done
+IFS=$as_save_IFS
+lt_ac_max=0
+lt_ac_count=0
+# Add /usr/xpg4/bin/sed as it is typically found on Solaris
+# along with /bin/sed that truncates output.
+for lt_ac_sed in $lt_ac_sed_list /usr/xpg4/bin/sed; do
+  test ! -f $lt_ac_sed && continue
+  cat /dev/null > conftest.in
+  lt_ac_count=0
+  echo $ECHO_N "0123456789$ECHO_C" >conftest.in
+  # Check for GNU sed and select it if it is found.
+  if "$lt_ac_sed" --version 2>&1 < /dev/null | grep 'GNU' > /dev/null; then
+    lt_cv_path_SED=$lt_ac_sed
+    break
+  fi
+  while true; do
+    cat conftest.in conftest.in >conftest.tmp
+    mv conftest.tmp conftest.in
+    cp conftest.in conftest.nl
+    echo >>conftest.nl
+    $lt_ac_sed -e 's/a$//' < conftest.nl >conftest.out || break
+    cmp -s conftest.out conftest.nl || break
+    # 10000 chars as input seems more than enough
+    test $lt_ac_count -gt 10 && break
+    lt_ac_count=`expr $lt_ac_count + 1`
+    if test $lt_ac_count -gt $lt_ac_max; then
+      lt_ac_max=$lt_ac_count
+      lt_cv_path_SED=$lt_ac_sed
+    fi
+  done
+done
+])
+SED=$lt_cv_path_SED
+AC_SUBST([SED])
+AC_MSG_RESULT([$SED])
+])#AC_PROG_SED
+])#m4_ifndef
+
+# Old name:
+AU_ALIAS([LT_AC_PROG_SED], [AC_PROG_SED])
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([LT_AC_PROG_SED], [])
+
+
+# _LT_CHECK_SHELL_FEATURES
+# ------------------------
+# Find out whether the shell is Bourne or XSI compatible,
+# or has some other useful features.
+m4_defun([_LT_CHECK_SHELL_FEATURES],
+[AC_MSG_CHECKING([whether the shell understands some XSI constructs])
+# Try some XSI features
+xsi_shell=no
+( _lt_dummy="a/b/c"
+  test "${_lt_dummy##*/},${_lt_dummy%/*},"${_lt_dummy%"$_lt_dummy"}, \
+      = c,a/b,, \
+    && eval 'test $(( 1 + 1 )) -eq 2 \
+    && test "${#_lt_dummy}" -eq 5' ) >/dev/null 2>&1 \
+  && xsi_shell=yes
+AC_MSG_RESULT([$xsi_shell])
+_LT_CONFIG_LIBTOOL_INIT([xsi_shell='$xsi_shell'])
+
+AC_MSG_CHECKING([whether the shell understands "+="])
+lt_shell_append=no
+( foo=bar; set foo baz; eval "$[1]+=\$[2]" && test "$foo" = barbaz ) \
+    >/dev/null 2>&1 \
+  && lt_shell_append=yes
+AC_MSG_RESULT([$lt_shell_append])
+_LT_CONFIG_LIBTOOL_INIT([lt_shell_append='$lt_shell_append'])
+
+if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  lt_unset=unset
+else
+  lt_unset=false
+fi
+_LT_DECL([], [lt_unset], [0], [whether the shell understands "unset"])dnl
+
+# test EBCDIC or ASCII
+case `echo X|tr X '\101'` in
+ A) # ASCII based system
+    # \n is not interpreted correctly by Solaris 8 /usr/ucb/tr
+  lt_SP2NL='tr \040 \012'
+  lt_NL2SP='tr \015\012 \040\040'
+  ;;
+ *) # EBCDIC based system
+  lt_SP2NL='tr \100 \n'
+  lt_NL2SP='tr \r\n \100\100'
+  ;;
+esac
+_LT_DECL([SP2NL], [lt_SP2NL], [1], [turn spaces into newlines])dnl
+_LT_DECL([NL2SP], [lt_NL2SP], [1], [turn newlines into spaces])dnl
+])# _LT_CHECK_SHELL_FEATURES
+
+
+# _LT_PROG_XSI_SHELLFNS
+# ---------------------
+# Bourne and XSI compatible variants of some useful shell functions.
+m4_defun([_LT_PROG_XSI_SHELLFNS],
+[case $xsi_shell in
+  yes)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_dirname file append nondir_replacement
+# Compute the dirname of FILE.  If nonempty, add APPEND to the result,
+# otherwise set result to NONDIR_REPLACEMENT.
+func_dirname ()
+{
+  case ${1} in
+    */*) func_dirname_result="${1%/*}${2}" ;;
+    *  ) func_dirname_result="${3}" ;;
+  esac
+}
+
+# func_basename file
+func_basename ()
+{
+  func_basename_result="${1##*/}"
+}
+
+# func_dirname_and_basename file append nondir_replacement
+# perform func_basename and func_dirname in a single function
+# call:
+#   dirname:  Compute the dirname of FILE.  If nonempty,
+#             add APPEND to the result, otherwise set result
+#             to NONDIR_REPLACEMENT.
+#             value returned in "$func_dirname_result"
+#   basename: Compute filename of FILE.
+#             value retuned in "$func_basename_result"
+# Implementation must be kept synchronized with func_dirname
+# and func_basename. For efficiency, we do not delegate to
+# those functions but instead duplicate the functionality here.
+func_dirname_and_basename ()
+{
+  case ${1} in
+    */*) func_dirname_result="${1%/*}${2}" ;;
+    *  ) func_dirname_result="${3}" ;;
+  esac
+  func_basename_result="${1##*/}"
+}
+
+# func_stripname prefix suffix name
+# strip PREFIX and SUFFIX off of NAME.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+func_stripname ()
+{
+  # pdksh 5.2.14 does not do ${X%$Y} correctly if both X and Y are
+  # positional parameters, so assign one to ordinary parameter first.
+  func_stripname_result=${3}
+  func_stripname_result=${func_stripname_result#"${1}"}
+  func_stripname_result=${func_stripname_result%"${2}"}
+}
+
+# func_opt_split
+func_opt_split ()
+{
+  func_opt_split_opt=${1%%=*}
+  func_opt_split_arg=${1#*=}
+}
+
+# func_lo2o object
+func_lo2o ()
+{
+  case ${1} in
+    *.lo) func_lo2o_result=${1%.lo}.${objext} ;;
+    *)    func_lo2o_result=${1} ;;
+  esac
+}
+
+# func_xform libobj-or-source
+func_xform ()
+{
+  func_xform_result=${1%.*}.lo
+}
+
+# func_arith arithmetic-term...
+func_arith ()
+{
+  func_arith_result=$(( $[*] ))
+}
+
+# func_len string
+# STRING may not start with a hyphen.
+func_len ()
+{
+  func_len_result=${#1}
+}
+
+_LT_EOF
+    ;;
+  *) # Bourne compatible functions.
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_dirname file append nondir_replacement
+# Compute the dirname of FILE.  If nonempty, add APPEND to the result,
+# otherwise set result to NONDIR_REPLACEMENT.
+func_dirname ()
+{
+  # Extract subdirectory from the argument.
+  func_dirname_result=`$ECHO "X${1}" | $Xsed -e "$dirname"`
+  if test "X$func_dirname_result" = "X${1}"; then
+    func_dirname_result="${3}"
+  else
+    func_dirname_result="$func_dirname_result${2}"
+  fi
+}
+
+# func_basename file
+func_basename ()
+{
+  func_basename_result=`$ECHO "X${1}" | $Xsed -e "$basename"`
+}
+
+dnl func_dirname_and_basename
+dnl A portable version of this function is already defined in general.m4sh
+dnl so there is no need for it here.
+
+# func_stripname prefix suffix name
+# strip PREFIX and SUFFIX off of NAME.
+# PREFIX and SUFFIX must not contain globbing or regex special
+# characters, hashes, percent signs, but SUFFIX may contain a leading
+# dot (in which case that matches only a dot).
+# func_strip_suffix prefix name
+func_stripname ()
+{
+  case ${2} in
+    .*) func_stripname_result=`$ECHO "X${3}" \
+           | $Xsed -e "s%^${1}%%" -e "s%\\\\${2}\$%%"`;;
+    *)  func_stripname_result=`$ECHO "X${3}" \
+           | $Xsed -e "s%^${1}%%" -e "s%${2}\$%%"`;;
+  esac
+}
+
+# sed scripts:
+my_sed_long_opt='1s/^\(-[[^=]]*\)=.*/\1/;q'
+my_sed_long_arg='1s/^-[[^=]]*=//'
+
+# func_opt_split
+func_opt_split ()
+{
+  func_opt_split_opt=`$ECHO "X${1}" | $Xsed -e "$my_sed_long_opt"`
+  func_opt_split_arg=`$ECHO "X${1}" | $Xsed -e "$my_sed_long_arg"`
+}
+
+# func_lo2o object
+func_lo2o ()
+{
+  func_lo2o_result=`$ECHO "X${1}" | $Xsed -e "$lo2o"`
+}
+
+# func_xform libobj-or-source
+func_xform ()
+{
+  func_xform_result=`$ECHO "X${1}" | $Xsed -e 's/\.[[^.]]*$/.lo/'`
+}
+
+# func_arith arithmetic-term...
+func_arith ()
+{
+  func_arith_result=`expr "$[@]"`
+}
+
+# func_len string
+# STRING may not start with a hyphen.
+func_len ()
+{
+  func_len_result=`expr "$[1]" : ".*" 2>/dev/null || echo $max_cmd_len`
+}
+
+_LT_EOF
+esac
+
+case $lt_shell_append in
+  yes)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_append var value
+# Append VALUE to the end of shell variable VAR.
+func_append ()
+{
+  eval "$[1]+=\$[2]"
+}
+_LT_EOF
+    ;;
+  *)
+    cat << \_LT_EOF >> "$cfgfile"
+
+# func_append var value
+# Append VALUE to the end of shell variable VAR.
+func_append ()
+{
+  eval "$[1]=\$$[1]\$[2]"
+}
+
+_LT_EOF
+    ;;
+  esac
+])
diff --git a/m4/ltoptions.m4 b/m4/ltoptions.m4
new file mode 100644
index 0000000..34151a3
--- /dev/null
+++ b/m4/ltoptions.m4
@@ -0,0 +1,368 @@
+# Helper functions for option handling.                    -*- Autoconf -*-
+#
+#   Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+#   Written by Gary V. Vaughan, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 6 ltoptions.m4
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])])
+
+
+# _LT_MANGLE_OPTION(MACRO-NAME, OPTION-NAME)
+# ------------------------------------------
+m4_define([_LT_MANGLE_OPTION],
+[[_LT_OPTION_]m4_bpatsubst($1__$2, [[^a-zA-Z0-9_]], [_])])
+
+
+# _LT_SET_OPTION(MACRO-NAME, OPTION-NAME)
+# ---------------------------------------
+# Set option OPTION-NAME for macro MACRO-NAME, and if there is a
+# matching handler defined, dispatch to it.  Other OPTION-NAMEs are
+# saved as a flag.
+m4_define([_LT_SET_OPTION],
+[m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl
+m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]),
+        _LT_MANGLE_DEFUN([$1], [$2]),
+    [m4_warning([Unknown $1 option `$2'])])[]dnl
+])
+
+
+# _LT_IF_OPTION(MACRO-NAME, OPTION-NAME, IF-SET, [IF-NOT-SET])
+# ------------------------------------------------------------
+# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
+m4_define([_LT_IF_OPTION],
+[m4_ifdef(_LT_MANGLE_OPTION([$1], [$2]), [$3], [$4])])
+
+
+# _LT_UNLESS_OPTIONS(MACRO-NAME, OPTION-LIST, IF-NOT-SET)
+# -------------------------------------------------------
+# Execute IF-NOT-SET unless all options in OPTION-LIST for MACRO-NAME
+# are set.
+m4_define([_LT_UNLESS_OPTIONS],
+[m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
+	    [m4_ifdef(_LT_MANGLE_OPTION([$1], _LT_Option),
+		      [m4_define([$0_found])])])[]dnl
+m4_ifdef([$0_found], [m4_undefine([$0_found])], [$3
+])[]dnl
+])
+
+
+# _LT_SET_OPTIONS(MACRO-NAME, OPTION-LIST)
+# ----------------------------------------
+# OPTION-LIST is a space-separated list of Libtool options associated
+# with MACRO-NAME.  If any OPTION has a matching handler declared with
+# LT_OPTION_DEFINE, dispatch to that macro; otherwise complain about
+# the unknown option and exit.
+m4_defun([_LT_SET_OPTIONS],
+[# Set options
+m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
+    [_LT_SET_OPTION([$1], _LT_Option)])
+
+m4_if([$1],[LT_INIT],[
+  dnl
+  dnl Simply set some default values (i.e off) if boolean options were not
+  dnl specified:
+  _LT_UNLESS_OPTIONS([LT_INIT], [dlopen], [enable_dlopen=no
+  ])
+  _LT_UNLESS_OPTIONS([LT_INIT], [win32-dll], [enable_win32_dll=no
+  ])
+  dnl
+  dnl If no reference was made to various pairs of opposing options, then
+  dnl we run the default mode handler for the pair.  For example, if neither
+  dnl `shared' nor `disable-shared' was passed, we enable building of shared
+  dnl archives by default:
+  _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED])
+  _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC])
+  _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC])
+  _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install],
+  		   [_LT_ENABLE_FAST_INSTALL])
+  ])
+])# _LT_SET_OPTIONS
+
+
+## --------------------------------- ##
+## Macros to handle LT_INIT options. ##
+## --------------------------------- ##
+
+# _LT_MANGLE_DEFUN(MACRO-NAME, OPTION-NAME)
+# -----------------------------------------
+m4_define([_LT_MANGLE_DEFUN],
+[[_LT_OPTION_DEFUN_]m4_bpatsubst(m4_toupper([$1__$2]), [[^A-Z0-9_]], [_])])
+
+
+# LT_OPTION_DEFINE(MACRO-NAME, OPTION-NAME, CODE)
+# -----------------------------------------------
+m4_define([LT_OPTION_DEFINE],
+[m4_define(_LT_MANGLE_DEFUN([$1], [$2]), [$3])[]dnl
+])# LT_OPTION_DEFINE
+
+
+# dlopen
+# ------
+LT_OPTION_DEFINE([LT_INIT], [dlopen], [enable_dlopen=yes
+])
+
+AU_DEFUN([AC_LIBTOOL_DLOPEN],
+[_LT_SET_OPTION([LT_INIT], [dlopen])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the `dlopen' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_DLOPEN], [])
+
+
+# win32-dll
+# ---------
+# Declare package support for building win32 dll's.
+LT_OPTION_DEFINE([LT_INIT], [win32-dll],
+[enable_win32_dll=yes
+
+case $host in
+*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-cegcc*)
+  AC_CHECK_TOOL(AS, as, false)
+  AC_CHECK_TOOL(DLLTOOL, dlltool, false)
+  AC_CHECK_TOOL(OBJDUMP, objdump, false)
+  ;;
+esac
+
+test -z "$AS" && AS=as
+_LT_DECL([], [AS],      [0], [Assembler program])dnl
+
+test -z "$DLLTOOL" && DLLTOOL=dlltool
+_LT_DECL([], [DLLTOOL], [0], [DLL creation program])dnl
+
+test -z "$OBJDUMP" && OBJDUMP=objdump
+_LT_DECL([], [OBJDUMP], [0], [Object dumper program])dnl
+])# win32-dll
+
+AU_DEFUN([AC_LIBTOOL_WIN32_DLL],
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+_LT_SET_OPTION([LT_INIT], [win32-dll])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the `win32-dll' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], [])
+
+
+# _LT_ENABLE_SHARED([DEFAULT])
+# ----------------------------
+# implement the --enable-shared flag, and supports the `shared' and
+# `disable-shared' LT_INIT options.
+# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+m4_define([_LT_ENABLE_SHARED],
+[m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([shared],
+    [AS_HELP_STRING([--enable-shared@<:@=PKGS@:>@],
+	[build shared libraries @<:@default=]_LT_ENABLE_SHARED_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_shared=yes ;;
+    no) enable_shared=no ;;
+    *)
+      enable_shared=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_shared=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac],
+    [enable_shared=]_LT_ENABLE_SHARED_DEFAULT)
+
+    _LT_DECL([build_libtool_libs], [enable_shared], [0],
+	[Whether or not to build shared libraries])
+])# _LT_ENABLE_SHARED
+
+LT_OPTION_DEFINE([LT_INIT], [shared], [_LT_ENABLE_SHARED([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-shared], [_LT_ENABLE_SHARED([no])])
+
+# Old names:
+AC_DEFUN([AC_ENABLE_SHARED],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared])
+])
+
+AC_DEFUN([AC_DISABLE_SHARED],
+[_LT_SET_OPTION([LT_INIT], [disable-shared])
+])
+
+AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)])
+AU_DEFUN([AM_DISABLE_SHARED], [AC_DISABLE_SHARED($@)])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_ENABLE_SHARED], [])
+dnl AC_DEFUN([AM_DISABLE_SHARED], [])
+
+
+
+# _LT_ENABLE_STATIC([DEFAULT])
+# ----------------------------
+# implement the --enable-static flag, and support the `static' and
+# `disable-static' LT_INIT options.
+# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+m4_define([_LT_ENABLE_STATIC],
+[m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([static],
+    [AS_HELP_STRING([--enable-static@<:@=PKGS@:>@],
+	[build static libraries @<:@default=]_LT_ENABLE_STATIC_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_static=yes ;;
+    no) enable_static=no ;;
+    *)
+     enable_static=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_static=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac],
+    [enable_static=]_LT_ENABLE_STATIC_DEFAULT)
+
+    _LT_DECL([build_old_libs], [enable_static], [0],
+	[Whether or not to build static libraries])
+])# _LT_ENABLE_STATIC
+
+LT_OPTION_DEFINE([LT_INIT], [static], [_LT_ENABLE_STATIC([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-static], [_LT_ENABLE_STATIC([no])])
+
+# Old names:
+AC_DEFUN([AC_ENABLE_STATIC],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[static])
+])
+
+AC_DEFUN([AC_DISABLE_STATIC],
+[_LT_SET_OPTION([LT_INIT], [disable-static])
+])
+
+AU_DEFUN([AM_ENABLE_STATIC], [AC_ENABLE_STATIC($@)])
+AU_DEFUN([AM_DISABLE_STATIC], [AC_DISABLE_STATIC($@)])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AM_ENABLE_STATIC], [])
+dnl AC_DEFUN([AM_DISABLE_STATIC], [])
+
+
+
+# _LT_ENABLE_FAST_INSTALL([DEFAULT])
+# ----------------------------------
+# implement the --enable-fast-install flag, and support the `fast-install'
+# and `disable-fast-install' LT_INIT options.
+# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+m4_define([_LT_ENABLE_FAST_INSTALL],
+[m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl
+AC_ARG_ENABLE([fast-install],
+    [AS_HELP_STRING([--enable-fast-install@<:@=PKGS@:>@],
+    [optimize for fast installation @<:@default=]_LT_ENABLE_FAST_INSTALL_DEFAULT[@:>@])],
+    [p=${PACKAGE-default}
+    case $enableval in
+    yes) enable_fast_install=yes ;;
+    no) enable_fast_install=no ;;
+    *)
+      enable_fast_install=no
+      # Look at the argument we got.  We use all the common list separators.
+      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      for pkg in $enableval; do
+	IFS="$lt_save_ifs"
+	if test "X$pkg" = "X$p"; then
+	  enable_fast_install=yes
+	fi
+      done
+      IFS="$lt_save_ifs"
+      ;;
+    esac],
+    [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT)
+
+_LT_DECL([fast_install], [enable_fast_install], [0],
+	 [Whether or not to optimize for fast installation])dnl
+])# _LT_ENABLE_FAST_INSTALL
+
+LT_OPTION_DEFINE([LT_INIT], [fast-install], [_LT_ENABLE_FAST_INSTALL([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-fast-install], [_LT_ENABLE_FAST_INSTALL([no])])
+
+# Old names:
+AU_DEFUN([AC_ENABLE_FAST_INSTALL],
+[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you put
+the `fast-install' option into LT_INIT's first parameter.])
+])
+
+AU_DEFUN([AC_DISABLE_FAST_INSTALL],
+[_LT_SET_OPTION([LT_INIT], [disable-fast-install])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you put
+the `disable-fast-install' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], [])
+dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], [])
+
+
+# _LT_WITH_PIC([MODE])
+# --------------------
+# implement the --with-pic flag, and support the `pic-only' and `no-pic'
+# LT_INIT options.
+# MODE is either `yes' or `no'.  If omitted, it defaults to `both'.
+m4_define([_LT_WITH_PIC],
+[AC_ARG_WITH([pic],
+    [AS_HELP_STRING([--with-pic],
+	[try to use only PIC/non-PIC objects @<:@default=use both@:>@])],
+    [pic_mode="$withval"],
+    [pic_mode=default])
+
+test -z "$pic_mode" && pic_mode=m4_default([$1], [default])
+
+_LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl
+])# _LT_WITH_PIC
+
+LT_OPTION_DEFINE([LT_INIT], [pic-only], [_LT_WITH_PIC([yes])])
+LT_OPTION_DEFINE([LT_INIT], [no-pic], [_LT_WITH_PIC([no])])
+
+# Old name:
+AU_DEFUN([AC_LIBTOOL_PICMODE],
+[_LT_SET_OPTION([LT_INIT], [pic-only])
+AC_DIAGNOSE([obsolete],
+[$0: Remove this warning and the call to _LT_SET_OPTION when you
+put the `pic-only' option into LT_INIT's first parameter.])
+])
+
+dnl aclocal-1.4 backwards compatibility:
+dnl AC_DEFUN([AC_LIBTOOL_PICMODE], [])
+
+## ----------------- ##
+## LTDL_INIT Options ##
+## ----------------- ##
+
+m4_define([_LTDL_MODE], [])
+LT_OPTION_DEFINE([LTDL_INIT], [nonrecursive],
+		 [m4_define([_LTDL_MODE], [nonrecursive])])
+LT_OPTION_DEFINE([LTDL_INIT], [recursive],
+		 [m4_define([_LTDL_MODE], [recursive])])
+LT_OPTION_DEFINE([LTDL_INIT], [subproject],
+		 [m4_define([_LTDL_MODE], [subproject])])
+
+m4_define([_LTDL_TYPE], [])
+LT_OPTION_DEFINE([LTDL_INIT], [installable],
+		 [m4_define([_LTDL_TYPE], [installable])])
+LT_OPTION_DEFINE([LTDL_INIT], [convenience],
+		 [m4_define([_LTDL_TYPE], [convenience])])
diff --git a/m4/ltsugar.m4 b/m4/ltsugar.m4
new file mode 100644
index 0000000..9000a05
--- /dev/null
+++ b/m4/ltsugar.m4
@@ -0,0 +1,123 @@
+# ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
+#
+# Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+# Written by Gary V. Vaughan, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 6 ltsugar.m4
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
+
+
+# lt_join(SEP, ARG1, [ARG2...])
+# -----------------------------
+# Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
+# associated separator.
+# Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
+# versions in m4sugar had bugs.
+m4_define([lt_join],
+[m4_if([$#], [1], [],
+       [$#], [2], [[$2]],
+       [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
+m4_define([_lt_join],
+[m4_if([$#$2], [2], [],
+       [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
+
+
+# lt_car(LIST)
+# lt_cdr(LIST)
+# ------------
+# Manipulate m4 lists.
+# These macros are necessary as long as will still need to support
+# Autoconf-2.59 which quotes differently.
+m4_define([lt_car], [[$1]])
+m4_define([lt_cdr],
+[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
+       [$#], 1, [],
+       [m4_dquote(m4_shift($@))])])
+m4_define([lt_unquote], $1)
+
+
+# lt_append(MACRO-NAME, STRING, [SEPARATOR])
+# ------------------------------------------
+# Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
+# Note that neither SEPARATOR nor STRING are expanded; they are appended
+# to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
+# No SEPARATOR is output if MACRO-NAME was previously undefined (different
+# than defined and empty).
+#
+# This macro is needed until we can rely on Autoconf 2.62, since earlier
+# versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
+m4_define([lt_append],
+[m4_define([$1],
+	   m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
+
+
+
+# lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
+# ----------------------------------------------------------
+# Produce a SEP delimited list of all paired combinations of elements of
+# PREFIX-LIST with SUFFIX1 through SUFFIXn.  Each element of the list
+# has the form PREFIXmINFIXSUFFIXn.
+# Needed until we can rely on m4_combine added in Autoconf 2.62.
+m4_define([lt_combine],
+[m4_if(m4_eval([$# > 3]), [1],
+       [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
+[[m4_foreach([_Lt_prefix], [$2],
+	     [m4_foreach([_Lt_suffix],
+		]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
+	[_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
+
+
+# lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
+# -----------------------------------------------------------------------
+# Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
+# by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
+m4_define([lt_if_append_uniq],
+[m4_ifdef([$1],
+	  [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
+		 [lt_append([$1], [$2], [$3])$4],
+		 [$5])],
+	  [lt_append([$1], [$2], [$3])$4])])
+
+
+# lt_dict_add(DICT, KEY, VALUE)
+# -----------------------------
+m4_define([lt_dict_add],
+[m4_define([$1($2)], [$3])])
+
+
+# lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
+# --------------------------------------------
+m4_define([lt_dict_add_subkey],
+[m4_define([$1($2:$3)], [$4])])
+
+
+# lt_dict_fetch(DICT, KEY, [SUBKEY])
+# ----------------------------------
+m4_define([lt_dict_fetch],
+[m4_ifval([$3],
+	m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
+    m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
+
+
+# lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
+# -----------------------------------------------------------------
+m4_define([lt_if_dict_fetch],
+[m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
+	[$5],
+    [$6])])
+
+
+# lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
+# --------------------------------------------------------------
+m4_define([lt_dict_filter],
+[m4_if([$5], [], [],
+  [lt_join(m4_quote(m4_default([$4], [[, ]])),
+           lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
+		      [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
+])
diff --git a/m4/ltversion.m4 b/m4/ltversion.m4
new file mode 100644
index 0000000..f3c5309
--- /dev/null
+++ b/m4/ltversion.m4
@@ -0,0 +1,23 @@
+# ltversion.m4 -- version numbers			-*- Autoconf -*-
+#
+#   Copyright (C) 2004 Free Software Foundation, Inc.
+#   Written by Scott James Remnant, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# Generated from ltversion.in.
+
+# serial 3017 ltversion.m4
+# This file is part of GNU Libtool
+
+m4_define([LT_PACKAGE_VERSION], [2.2.6b])
+m4_define([LT_PACKAGE_REVISION], [1.3017])
+
+AC_DEFUN([LTVERSION_VERSION],
+[macro_version='2.2.6b'
+macro_revision='1.3017'
+_LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?])
+_LT_DECL(, macro_revision, 0)
+])
diff --git a/m4/lt~obsolete.m4 b/m4/lt~obsolete.m4
new file mode 100644
index 0000000..637bb20
--- /dev/null
+++ b/m4/lt~obsolete.m4
@@ -0,0 +1,92 @@
+# lt~obsolete.m4 -- aclocal satisfying obsolete definitions.    -*-Autoconf-*-
+#
+#   Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
+#   Written by Scott James Remnant, 2004.
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# serial 4 lt~obsolete.m4
+
+# These exist entirely to fool aclocal when bootstrapping libtool.
+#
+# In the past libtool.m4 has provided macros via AC_DEFUN (or AU_DEFUN)
+# which have later been changed to m4_define as they aren't part of the
+# exported API, or moved to Autoconf or Automake where they belong.
+#
+# The trouble is, aclocal is a bit thick.  It'll see the old AC_DEFUN
+# in /usr/share/aclocal/libtool.m4 and remember it, then when it sees us
+# using a macro with the same name in our local m4/libtool.m4 it'll
+# pull the old libtool.m4 in (it doesn't see our shiny new m4_define
+# and doesn't know about Autoconf macros at all.)
+#
+# So we provide this file, which has a silly filename so it's always
+# included after everything else.  This provides aclocal with the
+# AC_DEFUNs it wants, but when m4 processes it, it doesn't do anything
+# because those macros already exist, or will be overwritten later.
+# We use AC_DEFUN over AU_DEFUN for compatibility with aclocal-1.6. 
+#
+# Anytime we withdraw an AC_DEFUN or AU_DEFUN, remember to add it here.
+# Yes, that means every name once taken will need to remain here until
+# we give up compatibility with versions before 1.7, at which point
+# we need to keep only those names which we still refer to.
+
+# This is to help aclocal find these macros, as it can't see m4_define.
+AC_DEFUN([LTOBSOLETE_VERSION], [m4_if([1])])
+
+m4_ifndef([AC_LIBTOOL_LINKER_OPTION],	[AC_DEFUN([AC_LIBTOOL_LINKER_OPTION])])
+m4_ifndef([AC_PROG_EGREP],		[AC_DEFUN([AC_PROG_EGREP])])
+m4_ifndef([_LT_AC_PROG_ECHO_BACKSLASH],	[AC_DEFUN([_LT_AC_PROG_ECHO_BACKSLASH])])
+m4_ifndef([_LT_AC_SHELL_INIT],		[AC_DEFUN([_LT_AC_SHELL_INIT])])
+m4_ifndef([_LT_AC_SYS_LIBPATH_AIX],	[AC_DEFUN([_LT_AC_SYS_LIBPATH_AIX])])
+m4_ifndef([_LT_PROG_LTMAIN],		[AC_DEFUN([_LT_PROG_LTMAIN])])
+m4_ifndef([_LT_AC_TAGVAR],		[AC_DEFUN([_LT_AC_TAGVAR])])
+m4_ifndef([AC_LTDL_ENABLE_INSTALL],	[AC_DEFUN([AC_LTDL_ENABLE_INSTALL])])
+m4_ifndef([AC_LTDL_PREOPEN],		[AC_DEFUN([AC_LTDL_PREOPEN])])
+m4_ifndef([_LT_AC_SYS_COMPILER],	[AC_DEFUN([_LT_AC_SYS_COMPILER])])
+m4_ifndef([_LT_AC_LOCK],		[AC_DEFUN([_LT_AC_LOCK])])
+m4_ifndef([AC_LIBTOOL_SYS_OLD_ARCHIVE],	[AC_DEFUN([AC_LIBTOOL_SYS_OLD_ARCHIVE])])
+m4_ifndef([_LT_AC_TRY_DLOPEN_SELF],	[AC_DEFUN([_LT_AC_TRY_DLOPEN_SELF])])
+m4_ifndef([AC_LIBTOOL_PROG_CC_C_O],	[AC_DEFUN([AC_LIBTOOL_PROG_CC_C_O])])
+m4_ifndef([AC_LIBTOOL_SYS_HARD_LINK_LOCKS], [AC_DEFUN([AC_LIBTOOL_SYS_HARD_LINK_LOCKS])])
+m4_ifndef([AC_LIBTOOL_OBJDIR],		[AC_DEFUN([AC_LIBTOOL_OBJDIR])])
+m4_ifndef([AC_LTDL_OBJDIR],		[AC_DEFUN([AC_LTDL_OBJDIR])])
+m4_ifndef([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH], [AC_DEFUN([AC_LIBTOOL_PROG_LD_HARDCODE_LIBPATH])])
+m4_ifndef([AC_LIBTOOL_SYS_LIB_STRIP],	[AC_DEFUN([AC_LIBTOOL_SYS_LIB_STRIP])])
+m4_ifndef([AC_PATH_MAGIC],		[AC_DEFUN([AC_PATH_MAGIC])])
+m4_ifndef([AC_PROG_LD_GNU],		[AC_DEFUN([AC_PROG_LD_GNU])])
+m4_ifndef([AC_PROG_LD_RELOAD_FLAG],	[AC_DEFUN([AC_PROG_LD_RELOAD_FLAG])])
+m4_ifndef([AC_DEPLIBS_CHECK_METHOD],	[AC_DEFUN([AC_DEPLIBS_CHECK_METHOD])])
+m4_ifndef([AC_LIBTOOL_PROG_COMPILER_NO_RTTI], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_NO_RTTI])])
+m4_ifndef([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE], [AC_DEFUN([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE])])
+m4_ifndef([AC_LIBTOOL_PROG_COMPILER_PIC], [AC_DEFUN([AC_LIBTOOL_PROG_COMPILER_PIC])])
+m4_ifndef([AC_LIBTOOL_PROG_LD_SHLIBS],	[AC_DEFUN([AC_LIBTOOL_PROG_LD_SHLIBS])])
+m4_ifndef([AC_LIBTOOL_POSTDEP_PREDEP],	[AC_DEFUN([AC_LIBTOOL_POSTDEP_PREDEP])])
+m4_ifndef([LT_AC_PROG_EGREP],		[AC_DEFUN([LT_AC_PROG_EGREP])])
+m4_ifndef([LT_AC_PROG_SED],		[AC_DEFUN([LT_AC_PROG_SED])])
+m4_ifndef([_LT_CC_BASENAME],		[AC_DEFUN([_LT_CC_BASENAME])])
+m4_ifndef([_LT_COMPILER_BOILERPLATE],	[AC_DEFUN([_LT_COMPILER_BOILERPLATE])])
+m4_ifndef([_LT_LINKER_BOILERPLATE],	[AC_DEFUN([_LT_LINKER_BOILERPLATE])])
+m4_ifndef([_AC_PROG_LIBTOOL],		[AC_DEFUN([_AC_PROG_LIBTOOL])])
+m4_ifndef([AC_LIBTOOL_SETUP],		[AC_DEFUN([AC_LIBTOOL_SETUP])])
+m4_ifndef([_LT_AC_CHECK_DLFCN],		[AC_DEFUN([_LT_AC_CHECK_DLFCN])])
+m4_ifndef([AC_LIBTOOL_SYS_DYNAMIC_LINKER],	[AC_DEFUN([AC_LIBTOOL_SYS_DYNAMIC_LINKER])])
+m4_ifndef([_LT_AC_TAGCONFIG],		[AC_DEFUN([_LT_AC_TAGCONFIG])])
+m4_ifndef([AC_DISABLE_FAST_INSTALL],	[AC_DEFUN([AC_DISABLE_FAST_INSTALL])])
+m4_ifndef([_LT_AC_LANG_CXX],		[AC_DEFUN([_LT_AC_LANG_CXX])])
+m4_ifndef([_LT_AC_LANG_F77],		[AC_DEFUN([_LT_AC_LANG_F77])])
+m4_ifndef([_LT_AC_LANG_GCJ],		[AC_DEFUN([_LT_AC_LANG_GCJ])])
+m4_ifndef([AC_LIBTOOL_RC],		[AC_DEFUN([AC_LIBTOOL_RC])])
+m4_ifndef([AC_LIBTOOL_LANG_C_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_C_CONFIG])])
+m4_ifndef([_LT_AC_LANG_C_CONFIG],	[AC_DEFUN([_LT_AC_LANG_C_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_CXX_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_CXX_CONFIG])])
+m4_ifndef([_LT_AC_LANG_CXX_CONFIG],	[AC_DEFUN([_LT_AC_LANG_CXX_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_F77_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_F77_CONFIG])])
+m4_ifndef([_LT_AC_LANG_F77_CONFIG],	[AC_DEFUN([_LT_AC_LANG_F77_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_GCJ_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_GCJ_CONFIG])])
+m4_ifndef([_LT_AC_LANG_GCJ_CONFIG],	[AC_DEFUN([_LT_AC_LANG_GCJ_CONFIG])])
+m4_ifndef([AC_LIBTOOL_LANG_RC_CONFIG],	[AC_DEFUN([AC_LIBTOOL_LANG_RC_CONFIG])])
+m4_ifndef([_LT_AC_LANG_RC_CONFIG],	[AC_DEFUN([_LT_AC_LANG_RC_CONFIG])])
+m4_ifndef([AC_LIBTOOL_CONFIG],		[AC_DEFUN([AC_LIBTOOL_CONFIG])])
+m4_ifndef([_LT_AC_FILE_LTDLL_C],	[AC_DEFUN([_LT_AC_FILE_LTDLL_C])])
diff --git a/missing b/missing
new file mode 100755
index 0000000..28055d2
--- /dev/null
+++ b/missing
@@ -0,0 +1,376 @@
+#! /bin/sh
+# Common stub for a few missing GNU programs while installing.
+
+scriptversion=2009-04-28.21; # UTC
+
+# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006,
+# 2008, 2009 Free Software Foundation, Inc.
+# Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try \`$0 --help' for more information"
+  exit 1
+fi
+
+run=:
+sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p'
+sed_minuso='s/.* -o \([^ ]*\).*/\1/p'
+
+# In the cases where this matters, `missing' is being run in the
+# srcdir already.
+if test -f configure.ac; then
+  configure_ac=configure.ac
+else
+  configure_ac=configure.in
+fi
+
+msg="missing on your system"
+
+case $1 in
+--run)
+  # Try to run requested program, and just exit if it succeeds.
+  run=
+  shift
+  "$@" && exit 0
+  # Exit code 63 means version mismatch.  This often happens
+  # when the user try to use an ancient version of a tool on
+  # a file that requires a minimum version.  In this case we
+  # we should proceed has if the program had been absent, or
+  # if --run hadn't been passed.
+  if test $? = 63; then
+    run=:
+    msg="probably too old"
+  fi
+  ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
+error status if there is no known handling for PROGRAM.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+  --run           try to run the given command, and emulate it if it fails
+
+Supported PROGRAM values:
+  aclocal      touch file \`aclocal.m4'
+  autoconf     touch file \`configure'
+  autoheader   touch file \`config.h.in'
+  autom4te     touch the output file, or create a stub one
+  automake     touch all \`Makefile.in' files
+  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
+  flex         create \`lex.yy.c', if possible, from existing .c
+  help2man     touch the output file
+  lex          create \`lex.yy.c', if possible, from existing .c
+  makeinfo     touch the output file
+  tar          try tar, gnutar, gtar, then tar without non-portable flags
+  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]
+
+Version suffixes to PROGRAM as well as the prefixes \`gnu-', \`gnu', and
+\`g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: Unknown \`$1' option"
+    echo 1>&2 "Try \`$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# normalize program name to check for.
+program=`echo "$1" | sed '
+  s/^gnu-//; t
+  s/^gnu//; t
+  s/^g//; t'`
+
+# Now exit if we have it, but it failed.  Also exit now if we
+# don't have it and --version was passed (most likely to detect
+# the program).  This is about non-GNU programs, so use $1 not
+# $program.
+case $1 in
+  lex*|yacc*)
+    # Not GNU programs, they don't have --version.
+    ;;
+
+  tar*)
+    if test -n "$run"; then
+       echo 1>&2 "ERROR: \`tar' requires --run"
+       exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       exit 1
+    fi
+    ;;
+
+  *)
+    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
+       # We have it, but it failed.
+       exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       # Could not run --version or --help.  This is probably someone
+       # running `$TOOL --version' or `$TOOL --help' to check whether
+       # $TOOL exists and not knowing $TOOL uses missing.
+       exit 1
+    fi
+    ;;
+esac
+
+# If it does not exist, or fails to run (possibly an outdated version),
+# try to emulate it.
+case $program in
+  aclocal*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`acinclude.m4' or \`${configure_ac}'.  You might want
+         to install the \`Automake' and \`Perl' packages.  Grab them from
+         any GNU archive site."
+    touch aclocal.m4
+    ;;
+
+  autoconf*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`${configure_ac}'.  You might want to install the
+         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
+         archive site."
+    touch configure
+    ;;
+
+  autoheader*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`acconfig.h' or \`${configure_ac}'.  You might want
+         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
+         from any GNU archive site."
+    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' ${configure_ac}`
+    test -z "$files" && files="config.h"
+    touch_files=
+    for f in $files; do
+      case $f in
+      *:*) touch_files="$touch_files "`echo "$f" |
+				       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
+      *) touch_files="$touch_files $f.in";;
+      esac
+    done
+    touch $touch_files
+    ;;
+
+  automake*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'.
+         You might want to install the \`Automake' and \`Perl' packages.
+         Grab them from any GNU archive site."
+    find . -type f -name Makefile.am -print |
+	   sed 's/\.am$/.in/' |
+	   while read f; do touch "$f"; done
+    ;;
+
+  autom4te*)
+    echo 1>&2 "\
+WARNING: \`$1' is needed, but is $msg.
+         You might have modified some files without having the
+         proper tools for further handling them.
+         You can get \`$1' as part of \`Autoconf' from any GNU
+         archive site."
+
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -f "$file"; then
+	touch $file
+    else
+	test -z "$file" || exec >$file
+	echo "#! /bin/sh"
+	echo "# Created by GNU Automake missing as a replacement of"
+	echo "#  $ $@"
+	echo "exit 0"
+	chmod +x $file
+	exit 1
+    fi
+    ;;
+
+  bison*|yacc*)
+    echo 1>&2 "\
+WARNING: \`$1' $msg.  You should only need it if
+         you modified a \`.y' file.  You may need the \`Bison' package
+         in order for those modifications to take effect.  You can get
+         \`Bison' from any GNU archive site."
+    rm -f y.tab.c y.tab.h
+    if test $# -ne 1; then
+        eval LASTARG="\${$#}"
+	case $LASTARG in
+	*.y)
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" y.tab.c
+	    fi
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" y.tab.h
+	    fi
+	  ;;
+	esac
+    fi
+    if test ! -f y.tab.h; then
+	echo >y.tab.h
+    fi
+    if test ! -f y.tab.c; then
+	echo 'main() { return 0; }' >y.tab.c
+    fi
+    ;;
+
+  lex*|flex*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified a \`.l' file.  You may need the \`Flex' package
+         in order for those modifications to take effect.  You can get
+         \`Flex' from any GNU archive site."
+    rm -f lex.yy.c
+    if test $# -ne 1; then
+        eval LASTARG="\${$#}"
+	case $LASTARG in
+	*.l)
+	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" lex.yy.c
+	    fi
+	  ;;
+	esac
+    fi
+    if test ! -f lex.yy.c; then
+	echo 'main() { return 0; }' >lex.yy.c
+    fi
+    ;;
+
+  help2man*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+	 you modified a dependency of a manual page.  You may need the
+	 \`Help2man' package in order for those modifications to take
+	 effect.  You can get \`Help2man' from any GNU archive site."
+
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -f "$file"; then
+	touch $file
+    else
+	test -z "$file" || exec >$file
+	echo ".ab help2man is required to generate this page"
+	exit $?
+    fi
+    ;;
+
+  makeinfo*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified a \`.texi' or \`.texinfo' file, or any other file
+         indirectly affecting the aspect of the manual.  The spurious
+         call might also be the consequence of using a buggy \`make' (AIX,
+         DU, IRIX).  You might want to install the \`Texinfo' package or
+         the \`GNU make' package.  Grab either from any GNU archive site."
+    # The file to touch is that specified with -o ...
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -z "$file"; then
+      # ... or it is the one specified with @setfilename ...
+      infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
+      file=`sed -n '
+	/^@setfilename/{
+	  s/.* \([^ ]*\) *$/\1/
+	  p
+	  q
+	}' $infile`
+      # ... or it is derived from the source name (dir/f.texi becomes f.info)
+      test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info
+    fi
+    # If the file does not exist, the user really needs makeinfo;
+    # let's fail without touching anything.
+    test -f $file || exit 1
+    touch $file
+    ;;
+
+  tar*)
+    shift
+
+    # We have already tried tar in the generic part.
+    # Look for gnutar/gtar before invocation to avoid ugly error
+    # messages.
+    if (gnutar --version > /dev/null 2>&1); then
+       gnutar "$@" && exit 0
+    fi
+    if (gtar --version > /dev/null 2>&1); then
+       gtar "$@" && exit 0
+    fi
+    firstarg="$1"
+    if shift; then
+	case $firstarg in
+	*o*)
+	    firstarg=`echo "$firstarg" | sed s/o//`
+	    tar "$firstarg" "$@" && exit 0
+	    ;;
+	esac
+	case $firstarg in
+	*h*)
+	    firstarg=`echo "$firstarg" | sed s/h//`
+	    tar "$firstarg" "$@" && exit 0
+	    ;;
+	esac
+    fi
+
+    echo 1>&2 "\
+WARNING: I can't seem to be able to run \`tar' with the given arguments.
+         You may want to install GNU tar or Free paxutils, or check the
+         command line arguments."
+    exit 1
+    ;;
+
+  *)
+    echo 1>&2 "\
+WARNING: \`$1' is needed, and is $msg.
+         You might have modified some files without having the
+         proper tools for further handling them.  Check the \`README' file,
+         it often tells you about the needed prerequisites for installing
+         this package.  You may also peek at any GNU archive site, in case
+         some other package would contain this missing \`$1' program."
+    exit 1
+    ;;
+esac
+
+exit 0
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/resource.sh b/resource.sh
new file mode 100755
index 0000000..c73d681
--- /dev/null
+++ b/resource.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# This script generates resource files.
+# Usage: ./resource.sh <file>
+# Resource file is printed to stdout.
+# Usable variables (<file> is stripped from path and extension):
+#    const char *<file>_rc; // File content in binary format
+#    const unsigned <file_rc_size; // File size
+# Examples:
+#    (file: dumps/test.out content: "ahoj")
+#    ./resource.sh dumps/test.out
+#    static const unsigned test_rc_size = 4;
+#    static const char test_rc[] = { 'a', 'h', 'o', 'j', '\0' };
+
+hd="hexdump -v -e"
+fmt="\"0\" \"x\" 1/1 \"%02X\" \", \""
+
+# Preparse source file name
+header="${1%.*}_rc"
+header=`basename ${header}`
+
+# Get file size and dump content
+size=`wc -c ${1} | awk '{print $1}' 2>/dev/null`
+dump=`${hd} "${fmt}" ${1} 2>/dev/null`
+
+# Format file size variable
+echo "static const unsigned ${header}_size = ${size};"
+
+# Format file content dump
+echo "static const char ${header}[] = { "
+echo "${dump}0x00 };"
diff --git a/samples/Makefile.am b/samples/Makefile.am
new file mode 100644
index 0000000..5ac505b
--- /dev/null
+++ b/samples/Makefile.am
@@ -0,0 +1,24 @@
+edit = sed \
+	-e 's|@version[@]|$(PACKAGE_VERSION)|g' \
+	-e 's|@package[@]|$(PACKAGE_NAME)|g' \
+	-e 's|@localstatedir[@]|$(localstatedir)|g' \
+	-e 's|@prefix[@]|$(prefix)|g' \
+	-e 's|@sysconfdir[@]|$(sysconfdir)|g'
+
+knot.sample.conf: Makefile
+	rm -f $@ $@.tmp
+	srcdir=''; \
+	  test -f ./$@.in || srcdir=$(srcdir)/; \
+	  $(edit) $${srcdir}$@.in >$@.tmp
+	mv $@.tmp $@
+
+knot.sample.conf: knot.sample.conf.in
+
+install-data-local: knot.sample.conf
+	[ -d $(sysconfdir) ] || \
+	  $(INSTALL) -d $(sysconfdir)
+	[ -f $(sysconfdir)/knot.sample.conf ] || \
+	  $(INSTALL_DATA) knot.sample.conf example.com.zone $(sysconfdir)
+
+clean-local:
+	rm -f knot.sample.conf
diff --git a/samples/Makefile.in b/samples/Makefile.in
new file mode 100644
index 0000000..a992c4c
--- /dev/null
+++ b/samples/Makefile.in
@@ -0,0 +1,385 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = samples
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_compiler_flags.m4 \
+	$(top_srcdir)/m4/ax_ext.m4 \
+	$(top_srcdir)/m4/ax_gcc_x86_cpuid.m4 \
+	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
+	$(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/src/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+SOURCES =
+DIST_SOURCES =
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AR = @AR@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+DSYMUTIL = @DSYMUTIL@
+DUMPBIN = @DUMPBIN@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+FGREP = @FGREP@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LEX = @LEX@
+LEXLIB = @LEXLIB@
+LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIMD_FLAGS = @SIMD_FLAGS@
+STRIP = @STRIP@
+VERSION = @VERSION@
+YACC = @YACC@
+YFLAGS = @YFLAGS@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+lt_ECHO = @lt_ECHO@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+edit = sed \
+	-e 's|@version[@]|$(PACKAGE_VERSION)|g' \
+	-e 's|@package[@]|$(PACKAGE_NAME)|g' \
+	-e 's|@localstatedir[@]|$(localstatedir)|g' \
+	-e 's|@prefix[@]|$(prefix)|g' \
+	-e 's|@sysconfdir[@]|$(sysconfdir)|g'
+
+all: all-am
+
+.SUFFIXES:
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu samples/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu samples/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+tags: TAGS
+TAGS:
+
+ctags: CTAGS
+CTAGS:
+
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-local mostlyclean-am
+
+distclean: distclean-am
+	-rm -f Makefile
+distclean-am: clean-am distclean-generic
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-data-local
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: all all-am check check-am clean clean-generic clean-libtool \
+	clean-local distclean distclean-generic distclean-libtool \
+	distdir dvi dvi-am html html-am info info-am install \
+	install-am install-data install-data-am install-data-local \
+	install-dvi install-dvi-am install-exec install-exec-am \
+	install-html install-html-am install-info install-info-am \
+	install-man install-pdf install-pdf-am install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-generic mostlyclean-libtool pdf pdf-am \
+	ps ps-am uninstall uninstall-am
+
+
+knot.sample.conf: Makefile
+	rm -f $@ $@.tmp
+	srcdir=''; \
+	  test -f ./$@.in || srcdir=$(srcdir)/; \
+	  $(edit) $${srcdir}$@.in >$@.tmp
+	mv $@.tmp $@
+
+knot.sample.conf: knot.sample.conf.in
+
+install-data-local: knot.sample.conf
+	[ -d $(sysconfdir) ] || \
+	  $(INSTALL) -d $(sysconfdir)
+	[ -f $(sysconfdir)/knot.sample.conf ] || \
+	  $(INSTALL_DATA) knot.sample.conf example.com.zone $(sysconfdir)
+
+clean-local:
+	rm -f knot.sample.conf
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/samples/bogus25.com.zone b/samples/bogus25.com.zone
new file mode 100644
index 0000000..5260270
--- /dev/null
+++ b/samples/bogus25.com.zone
@@ -0,0 +1,16 @@
+$TTL 3600
+bogus25.com.	IN	SOA	ns1.bogus25.com.	support.bogus25.com. (
+				20010923; Serial
+				10800	; Refresh after 3hrs
+				3600	; Retry after 1 hr
+				604800	; Expire in 1 week
+				86400 ) ; Minimum ttl 1 day 
+
+@	IN	NS	ns1.bogus25.com.
+@	IN	NS	ns2.bogus25.com.
+@	IN	MX	10	mail
+bogus25.com.	IN	A	72.96.52.127
+www	IN	CNAME   bogus25.com.
+ftp	IN	CNAME	bogus25.com.
+mail	IN	A	72.96.52.127
+
diff --git a/samples/example.com.zone b/samples/example.com.zone
new file mode 100644
index 0000000..a1e3aef
--- /dev/null
+++ b/samples/example.com.zone
@@ -0,0 +1,69 @@
+$TTL 1h                  ; The default expiration time of a resource record without its own TTL value
+$ORIGIN example.com.
+@  IN  SOA  ns.example.com. username.example.com. (
+              2007120713 ; serial number of this zone file
+              10         ; slave refresh (1 day)
+              30         ; slave retry time in case of a problem (1 day)
+              4w         ; slave expiration time (4 weeks)
+              1h         ; minimum caching time in case of failed lookups (1 hour)
+              )
+  NS    ns                    ; ns.example.com is the nameserver for example.com
+  NS    ns.somewhere.com.     ; ns.somewhere.com is a backup nameserver for example.com
+  MX    10 mail.example.com.  ; mail.example.com is the mailserver for example.com
+             MX    20 mail2.example.com. ; Similar to above line, but using "@" to say "use $ORIGIN"
+             MX    50 mail3              ; Similar to above line, but using a host within this domain
+  A     10.0.0.1              ; ip address for "example.com"
+ns            A     10.0.0.2              ; ip address for "ns.example.com". Since there is no "." after ns, $ORIGIN is attached
+www           CNAME ns                    ; "www.example.com" is an alias for "ns.example.com"
+wwwtest	CNAME www                   ; "wwwtest.example.com" is another alias for "www.example.com"
+mail          A     10.0.0.3              ; ip address for "mail.example.com", any MX record host must be
+ns.sub	A	10.1.0.1	; glue
+
+;ns.sub TYPE23444 \# abcedfg
+
+a	A	10.0.0.4
+*.a	A	10.0.0.5
+
+c	CNAME	c.a.example.com.
+@	NS	ns2
+ns2	A	10.0.0.6
+@	NS	c.a.example.com.
+
+sub2	NS	ns.sub2.example.com.
+*.sub2	A	10.2.0.1
+
+_foobar._tcp    SRV 0 1 9 old-slow-box.example.com.
+                SRV 0 3 9 new-fast-box.example.com.
+; if neither old-slow-box or new-fast-box is up, switch to
+; using the sysdmin's box and the server
+                SRV 1 0 9 sysadmins-box.example.com.
+                SRV 1 0 9 server.example.com.
+server           A   172.30.79.10
+old-slow-box     A   172.30.79.11
+sysadmins-box    A   172.30.79.12
+new-fast-box     A   172.30.79.13
+; NO other services are supported
+*._tcp          SRV  0 0 0 .
+*._udp          SRV  0 0 0 .
+
+sub3	NS	ns.sub2.example.com.
+sub4	NS	ns.example.com.
+
+d	CNAME	non-existing.example.com.
+e	DNAME	bogus25.com.
+f	CNAME	e.example.com.
+g	CNAME	www.bogus25.com.
+
+f.g	A	10.0.0.20
+h.i.j.k	A	10.0.0.21
+*.j.k	A	10.0.0.22
+
+sub5	CNAME	sub3
+*.l	CNAME	c.example.com.
+;*.m	NS	ns.sub2.example.com.
+*.n	DNAME	bogus25.com.
+o	CNAME	a.e.example.com.
+p	CNAME	a.sub.example.com.
+r	CNAME	a.l.example.com.
+*.s	CNAME	s
+s	A	10.1.1.1
diff --git a/samples/example.com.zone.nsec3 b/samples/example.com.zone.nsec3
new file mode 100644
index 0000000..f5bf984
--- /dev/null
+++ b/samples/example.com.zone.nsec3
@@ -0,0 +1,635 @@
+; File written on Tue Mar  1 10:45:24 2011
+; dnssec_signzone version 9.7.1-P2
+example.com.		3600	IN SOA	ns.example.com. username.example.com. (
+					2007120712 ; serial
+					86400      ; refresh (1 day)
+					86400      ; retry (1 day)
+					2419200    ; expire (4 weeks)
+					3600       ; minimum (1 hour)
+					)
+			3600	RRSIG	SOA 8 2 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					6G4Hpl8WFCTVZN292HX+NaS1K8+oLaXK+2gr
+					tIp53Y1MI/A8qAD2HZ+bECnbedU+mP5PIJ8I
+					4Q6STbZE3HpiaTMP8D87sJwgD6tUexHhBNgf
+					CPZQBdF2Gw/hP+yqeY89ZcoeJVimy6h56X+V
+					7KM+JqRQ6KlGo8vLJTn/lo3pOq8= )
+			3600	NS	c.a.example.com.
+			3600	NS	ns.example.com.
+			3600	NS	ns.somewhere.com.
+			3600	NS	ns2.example.com.
+			3600	RRSIG	NS 8 2 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					3VqU2AvI720W9frpY+jz5U6a25115tUmkC57
+					tr/fvZS2CEAYhWVEpSSFWKRApb70JmQeYgvt
+					pvdmOriyChzq4y6phVJxChYrFeTqVYS0AvE1
+					ldZ1k5xL6I0hIL6UXgMoz6nRZQ6T1qh/7G2o
+					Ge9Taqu0KroITTLGfn4HlyMViq4= )
+			3600	A	10.0.0.1
+			3600	RRSIG	A 8 2 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					5tOtdUUMjX0T7QWL/YgYga+HuJOLOh8O3to8
+					3fWUvS5hmrR5/hWV1TRXSHCS0HKIaPBJCn24
+					DCHM91uTPNASrpdyWlIAXTJBDqm62C0tXOKD
+					zn/50P0cgqHJXa7f69FQc5V+oA/OGcOb2xpV
+					e/ig/L8xLcRTGFoYScNMObq9tlg= )
+			3600	MX	10 mail.example.com.
+			3600	MX	20 mail2.example.com.
+			3600	MX	50 mail3.example.com.
+			3600	RRSIG	MX 8 2 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					yX8xQLpUeZCX3Q4Aq0PTsjEO+5HUrXTWSH1k
+					LQ6qozQqWW/SAvnYGkjL/MILnqtTFl07DyrY
+					1y++Ifh2vW5wR11lrIUiftpa0QmSUIj4eJlJ
+					fc78wZa3D1g6ni1VDsRClEk3Gx3sfmf2ryjN
+					QVa3s++ZszKolUR4WjGGJuwmbFI= )
+			3600	DNSKEY	256 3 8 (
+					AwEAAdtkxsfkpMv9P3oa4FGDr+zbs5T28hC2
+					G7zRsgHHSP1r3AS9JW8I3yCXI/DWJu5M0Iv3
+					UuOc5Q/lNoxmiMKipIP0UZZ97sRyVIK4RWfB
+					quVV0GKQ08exwUvUwkej9Uu5Ub0YcWkQXAg5
+					xVNpWZ5WxlVhcDVwXG/geikMJPyk6j2N
+					) ; key id = 25581
+			3600	DNSKEY	256 3 8 (
+					AwEAAesA9XFmAudDuFARUUn4fcYdwbPfSRYU
+					DVC792SMtnEl6dZBLujInZbbQiqW+OyVlo6v
+					kyjyQBDuS6aebN4sxO7UYz4vHxxJVuP/+H0n
+					/+UAyz11XYT8Rbsmpgzu3PMq5mB13jCjzZ9y
+					3JBJjp5Lrk/jRjFcZapDpX/yXu0UsuuV
+					) ; key id = 28635
+			3600	DNSKEY	257 3 8 (
+					AwEAAddbawR+0U7Bz/2lbX1iwMGmAoYOHmb8
+					sQF5Jp8gI1tEtpsDD42fW4EM1i1tx7Cyca/9
+					u9MSFB14BapX+dxMMj1xJJg0RNTiswjw4DC+
+					7idLwmQHDUMhZLJBqdGkSDcgfsXm9xNEdRrs
+					u10wxWpmqMUFxyGStSdGneqdchSRDgr6fihu
+					NExHeXp884kXUPuAXSYu02xtYOLLAAhqLeEL
+					tQAoyi901FwmmYhyu4eYK2aWqy+ld7JCZZbQ
+					j4/9zdecIGETI+NbvQVoO5lSGt6GY7cKaf8m
+					17L++dj2R2rTER/R3gwnjAGQ1GL/djhqbgMi
+					vhrxqAQ9R9Ko+6kaeqA6a60=
+					) ; key id = 6190
+			3600	RRSIG	DNSKEY 8 2 3600 20110331084524 (
+					20110301084524 6190 example.com.
+					qRB0bNPGgy4p2kGBNKbjK/03dowH3zx4fLyP
+					6wv4VmJinbqe2hxqLNLGTdA1toT/82iaLJEA
+					Nh0GKnYRVW1rmX/YsvArYH5Z8ikrZbTYSu7Z
+					TVTJHHXOGIbddpx3BaEPeNJyJHf7UF5yDKkv
+					wM8KhkMw7zRWnuLw5dWYTqmegMVHkNekIHrH
+					kW389rY7gbNsZexusmsKURhl3/LhRJlZd/hP
+					IlAUIhEV0DZ2xmFEkCOa7QRD/PMUwuiEykxd
+					0ffGm1aCzBUUWdVP7tbYbsePa9f380473m6U
+					xDSgNmU5/NjFRYw79/QopE68OU+7F+xTX+6S
+					U6bBtAvTPoG+RIBUAQ== )
+			3600	RRSIG	DNSKEY 8 2 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					MD75IQDQQtrDQTUHJV/F2cYfd49e6YkSWT7O
+					BuJUnTvyuYyxpqJg7Rj1H552078yrUQiNSCC
+					fqo9yoW6QrpxXgAsPW8wd4vT/bXRayvqZTRJ
+					6ht4FMvOe1dI0cMEOEGfOnve1r4faaHBYPIo
+					P5sJQIkoYpQ/0FOnOLz1dIiFZpI= )
+			0	NSEC3PARAM 1 0 100 8B3F579FA62A6CE6
+			0	RRSIG	NSEC3PARAM 8 2 0 20110331084524 (
+					20110301084524 28635 example.com.
+					Go3s7HQ1n+WLlECouJi/2P0h0F7buRYP7zSE
+					UcjBgBDczSucB8ZdfSI+Z9gZpJrOL+hpnhU5
+					UB0xVUldoWzO3KK/Zu0YEoBNf/z1eSA8Lrt0
+					kWtxDlppfYk9rMRJIBEkY4nNKJz/IlPppZ8j
+					TY361bbHGhoHmjJeozrdMGc6/Ls= )
+_foobar._tcp.example.com. 3600	IN SRV	0 1 9 old-slow-box.example.com.
+			3600	IN SRV	0 3 9 new-fast-box.example.com.
+			3600	IN SRV	1 0 9 server.example.com.
+			3600	IN SRV	1 0 9 sysadmins-box.example.com.
+			3600	RRSIG	SRV 8 4 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					45kpyR6Avac84Ycv/EpLT3ScICeNpLFgQq7P
+					peNgEpboXrJTc7uYUtoxswq19m9czMNQNcoZ
+					nFKw3unQGrsfr/B38Vz6uOc9ILF/4WQbC002
+					F+VGlgGvPVc9RficEYg3Wwzly7m27d4hPwk4
+					pnQQaVenubmXgVHKQ+kl1c8Bqu4= )
+*._udp.example.com.	3600	IN SRV	0 0 0 .
+			3600	RRSIG	SRV 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					zxu5UR7j0cgvdw8q1L8eD2AvsvhkhbSvuFQH
+					C8a0pYCmM0OoDEiLoHj5F9Mk7LI4Mc7sESfr
+					roKEOQC4y6xwsuQxCjuG+V2s4xnxLbSrZwee
+					JqaI3e8X/gVfd3VoKycY3MqDC1432Qc8VSZC
+					Lz9mb68ulNEK1VrEbbA3/jTGGOM= )
+a.example.com.		3600	IN A	10.0.0.4
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					x30rkJBwLV+aiDao0J1N/FbiUWROwBqkl6lK
+					V3z4zHfkcEgORa7o2kNkHANPCUJj7bQSSlPD
+					I99dyszDxYW4bgnlNlYw9h3D+6+sK9ehREDa
+					IMvV1Xuup+oo6LccJhZTlEFrGFU4oUF9VXj+
+					g4TDzCyCGMHnVj3SFc/+5xUXGsg= )
+c.example.com.		3600	IN CNAME c.a.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					1sHLDUiGyabatbzRknYdhwu4CQXH+bb6+9x0
+					yW/173FMudGOGowiPdfMkUFOP0Igqb/4FqVj
+					bg+jDdu4zFCszLQ5MC4Q6mrLL0nfUJ4JL2J9
+					kScZN12/t9+P0dnLb5YYXKV8E0GtlKd4ZVr5
+					9fRJvve/OsV29Xj02vX1+sXNjoE= )
+d.example.com.		3600	IN CNAME non-existing.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					Or6i4+ez4nkhodwJC8OWJaj9TyvxJ1i6HC3u
+					/xjwF/kStCkTaX/Cg8d36KhVGev6z6LyT++s
+					SKiQ0wdPzhgfv2d386W7XUSCje7/OCRUUZwp
+					taQvzJsfKCBy2hYz00Anai2qk1pldKEYI3aN
+					P3qnSItISO9zbOcKtV2ug6B304Y= )
+e.example.com.		3600	IN DNAME bogus25.com.
+			3600	RRSIG	DNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					sbrGVq24p55ke3GGXkr/7IPu3fNO67SUABQW
+					67VKrfL1AF5qWN7UdcEb5FZQ5302s28/mePb
+					c4Ubn2bpQrmHdMZm1W370J0fDQ/PBT9lKnQS
+					tZpAx6xPMRmLG+qvrOtGFDeuCVDqmRlK13wJ
+					ryCGvI2eJcfrOU7Kx98ZLgDTzbQ= )
+*._tcp.example.com.	3600	IN SRV	0 0 0 .
+			3600	RRSIG	SRV 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					k9YqgNDYkvF4tqiPjw0FCsL675BQ6V0mztXc
+					+Vfcd/bSbpD3HiMDbkmBeW68TH7g2rkqTzS2
+					yjXGdVsxo7jDWdfPiGDdAUueYbPzxEF1eY3q
+					v7oquG86sfTrbosYFPfihLXZrnGhVDIlHmgi
+					L428BtZbXTINKm9XwjFwv+pZ66s= )
+g.example.com.		3600	IN CNAME www.bogus25.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					gwENYoTmnyn38R4sIb1wJ/uKXPNQnKOu2gfa
+					sWW91lrkcwQYF59XZIDme+XST4fiscDJfjPH
+					9xHXs86j771L/2shVZkfh161qXMv2xWVKP14
+					tXXfjcQyz/YZ4S6S6MWkUl1w5ujqJCq4PLv0
+					+BucVmtjQkcxG9yR0P8F5hMZBsA= )
+*.j.k.example.com.	3600	IN A	10.0.0.22
+			3600	RRSIG	A 8 4 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					MI/Q/zFqnUrlIQmPjy4Kpq8lQ38PAi15cidP
+					C1ZutJUXV7aiYpJJcpmkDNRA96L+/cApfW06
+					/ahv+IYrxI3qWd8agOxDXTR/bclrxWJs8Zdq
+					aQeM+uvhtVCua6tRcdJf1UCHwEFpqoEg6xcs
+					3vR13IuPLlJrfe/AMrw1FvROfBg= )
+f.example.com.		3600	IN CNAME e.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					cvQbg2jKGDrL6dyOXSY++SaEzo31OKDPRXWe
+					l4pVWsJdK9YmjQ0zXdAVtqiYFdKsfS4ep5FG
+					VPFF3xuHF0cPzzozwQ3cyn6BRq6EVDohn5Ct
+					oyqSQ9jWuwDNdLxG6yCFK+R6bdlc5fxE3Jkn
+					qQ8hK6z7XHpHL7ZySVufRtGhMrA= )
+h.i.j.k.example.com.	3600	IN A	10.0.0.21
+			3600	RRSIG	A 8 6 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					m+FuNt4WmfnICukl82DSunja8nfoy68u+oBU
+					MX3nzp5AjwbqWyZTvQRaZpDa0Rsa90oHbCuv
+					hOYiK4tVdZjk0yd0Fx6XX/zFqD29BEI/oLu4
+					u8CPLvSC9vWB8bFScOjeoCUM+hmnoLVuZ/rq
+					XFHz/CQmYX+mpU3u7pKSpFyQDAw= )
+mail.example.com.	3600	IN A	10.0.0.3
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					HPK9q98C16xCURI5wxP3lxUGdJr1X1TeRZ2L
+					tnf2s5Izmt28Y3SIbVI83prKO/m4PrpfeV7T
+					Ji3ErMMUe7k6Q096YaGStBHL5GWeymJCAzC8
+					pJPnyzExDRZeGeknEg4bn0+WJHJz+hlVzYQx
+					LRaqA4O021aZf9U/sdDZhGBR0Hw= )
+*.a.example.com.	3600	IN A	10.0.0.5
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					fXOfzPtCYPPyxtw5ivLn7Kq3JlK+LR8BbYLp
+					Z6f/Nir3R00GURfsUM6NVbPnMOpnPE513yz7
+					1sAAO/rsOFXPZUSJF4G4zMA6O4OirjGh68bX
+					Ei/yrdllyPiTgtHI693MpsDvAFNIaO+pkgS6
+					zt+Mk1MEau+78saWxyZVbBWCqT4= )
+*.n.example.com.	3600	IN DNAME bogus25.com.
+			3600	RRSIG	DNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					s/gyETQ20pNXEbhwRhTIPTMOQYMW8KhhHaSN
+					uOYX57dabeGuYgfXFRfNIB+Y1m3kTlxmacMS
+					dNIep2b4SF59/T7Ww06/I4P/qQiOosdyeBSY
+					X4mQeMrUh8kqxh9C4cQh5yPiiz4w/0Ui+SLP
+					J/7Z0AKgYKh7t+pVQfiDAKGQJXo= )
+ns.example.com.		3600	IN A	10.0.0.2
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					aPAigU/glISbY2VM8F8JpfElQ+xab12ZO7el
+					5Cl3t1qiU/3iirBmaKTj7g6IhBduPx+iBgOy
+					5v32FyrfHi2El6nJZxEgi52/Z/4Ohvju3jVA
+					hUJLGoREc20FUXOiICCftEauQp7uPM1RAQ17
+					Q0pykRRQ50bn+jApSRLL696e+EY= )
+f.g.example.com.	3600	IN A	10.0.0.20
+			3600	RRSIG	A 8 4 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					EfjVvHQ/IEPdP10B+dEDfyHpCRNpmf0dV7Pb
+					Ia/gRDuoRg6FUbL04oycNQSMjafInBpinmx/
+					WSDMenEf5HUtP3fyzZ9Fywg2QDZqm6/TJXBk
+					8q+uOxPKfMlcn9Skg1k8XJGbJkAovmyCS+DA
+					LC2Ewp7yVUwEliZBkKzUblWE5ig= )
+ns2.example.com.	3600	IN A	10.0.0.6
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					hgX7gI1GpJeuQtTnVDCHS4esc1wRQk6zAP/8
+					st6cILlYbOQkwfRVpB88Y4LDCYuWLkplKBjp
+					cOhL/gU+zvR8QQQHmdksUlYSK0SFEdvcpvIm
+					uD4KosW3wJSAPS8M3bxI2yA/CPdY6SalClbY
+					jM/OpPfynAqS1UdNo8vNu4pBYks= )
+o.example.com.		3600	IN CNAME a.e.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					RMRnQd17zWB6vxGUl6L+zKWchPD9XyNMaK6W
+					v0MfpY5E9hqSMvNp5BKf+1Fsk5aWs9aWga/a
+					AVFUTObelpdG4IE4oyGSUB3wCN9ZTxJ9rKqd
+					NVG48X2+iAb2k3tGcUQaYH20gBIezPwi2AWc
+					k+CHI2FTi10evykIeVJo+Paro7I= )
+old-slow-box.example.com. 3600	IN A	172.30.79.11
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					LfF5v3pRRomTjLMLqCyEqK9J9m7dbBs1V0zS
+					bEu9T+MPOdW4swoObFBPv/FLqr50Y6OGlovK
+					J0lSGo+plLw6gPMW9bzJNGeIP19TgcEmF626
+					7+hRibwn6fZvoK4qBQSDQKmNBoST1u+ZhWa6
+					xpdY5bdosyQ0oM1Q6eHZsEGELvs= )
+*.l.example.com.	3600	IN CNAME c.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					l+p7hZxP1VakVXtcDE2dN+DCK9tAdZpT8i0i
+					IoUdRUgeTv2DcViVsK2tNjv0HIZcffhEatwi
+					pM7IAvqkbS22PduU+dxb3OMzcj6n/dQBcxoW
+					vfk56RpQcDrqPJVYn7AqVH6KXFg6oRrIYzw1
+					O9uTLaHt+futcIEDvRVMTODe9os= )
+sub.example.com.	3600	IN NS	ns.sub.example.com.
+ns.sub.example.com.	3600	IN A	10.1.0.1
+sub2.example.com.	3600	IN NS	ns.sub2.example.com.
+*.sub2.example.com.	3600	IN A	10.2.0.1
+sub3.example.com.	3600	IN NS	ns.sub2.example.com.
+sub4.example.com.	3600	IN NS	ns.example.com.
+server.example.com.	3600	IN A	172.30.79.10
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					zWLeUhLq/2lU0KwPFxzJaFIiOSqwA4xQ+mwh
+					UYSa27N1t58m3L+XeOwj/zSE69sWl8Lbm3pV
+					B+4FNVVPkGzBhocJRf/7a0xc0IlQSI1hgZ3p
+					meFlPC/kMTmxK1p9un/dF5r35FsnnAN8ECnR
+					2imbaQLIrjhHshK9bBIVCwK92Ws= )
+sysadmins-box.example.com. 3600	IN A	172.30.79.12
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					WUp7V4gH7JMyvtKURuvrNmW7rVMI1aSMZU9U
+					xukVAmQDaQTYXsD5XC3j7X+9gAhQJWA/JNga
+					pXT7wzBJpqVrJHqAfRYZFMQ9WI0rJzKJnFPI
+					WOlVerQMEwUpyJsX/GlJglldK5kKM0bbPjW8
+					s6Vqmq3rfyjGY94HNS9jX+uqCwk= )
+new-fast-box.example.com. 3600	IN A	172.30.79.13
+			3600	RRSIG	A 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					qK9x7sS736Go3vdVfYhtuEnFLOhl6djWpXVC
+					l4+kvvPpkAJTkfHmTcAsWbChSolB8X4UPt/P
+					KTnImnF4uhc2qLOhvToKqx9tVExEIWDBKA7F
+					JPPBYG0c6n/50j2bVmzrkhyzaLLuhsbbfm5o
+					eZDwwO+vuoMBvj8Z/mt0Di9rh/w= )
+www.example.com.	3600	IN CNAME ns.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					LPrX8sh5xYUfW+wKpQRg50qkf67maJRcN6tH
+					R+H3OwL4u9JhdK6RpdRvs4nAF8HmrUZZYtxo
+					80+RMbFhynqPYWlnXd/ZH6taQN2qJYdVLdnd
+					dhyLajAkxJqpOWVLezr2KOPj6YzJzu15ngXD
+					nHnkSKsTlziq3ifLd5oJLy9UJAk= )
+0J3ID6U2GQUPOADI9B867SGMROP8U4Q0.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 18DGVBOD0NE6AJ2OV3MV9QGNBTJ39V2U SRV RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					BStj/PbAk78rRKdCf4eCvtGKYGco/i7fg54U
+					mlIGY/ToQwsB4f9NuDpuajdt+30QnL6w1m5u
+					/Hku6cZAV7PEr5S286TWtIHu1GSUfjQ2ObKC
+					sF9PYoQrARTNYceY8ZKPNwTk1DgfBNM1WcdW
+					5zJLbQ/DfP/O1c9ZiaR5jokbRnE= )
+18DGVBOD0NE6AJ2OV3MV9QGNBTJ39V2U.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 28CVPDQCRQARAVE71745J8C1C9RR9U6A NS
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					LeQC7vW1322QqG/X08ZQ3hokSMIDB0rmGxk/
+					JsmrNt6o1hmpwfz9ET1GM6LDf+SLd12SdnYa
+					vRZxVVeUv7KloxZI77aaZabqKYWCX+LmkoJk
+					LAinY3wQ6vZD3vSP/BxUZL4Ojs0GNpWqGNzs
+					ZOkU9EOOE/mwQFlU6GamBJoy2nU= )
+sub5.example.com.	3600	IN CNAME sub3.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					qIPaS9aKJASzy2ncqcnlyLW4npkwBW12Udvc
+					zGyjk/bO8Q58eKm3uBfJ3LtQVCznkBhAksXK
+					AXGnN1TRtaxeVBWZNqlRtHV2hgmXQsTWxoVz
+					Qc8Qz2LvnzfgRTjt0H1n/5aDQ3FeZ25XuwLB
+					W5fFHwvOmQDd3lvZhOJVfSvEKNM= )
+28CVPDQCRQARAVE71745J8C1C9RR9U6A.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 2BMOOQEUMB3KGE328CJ7B2Q65OPJM8DJ CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					i2K6FAon2wyZnGTH35mMmjWth+czEC1cdoyL
+					hk6Xd3iGrN5tjPAqkMtuKDuG2boGjDP02npj
+					Ytv59m5IK5vSNgeOekR6TRNWdJ/S3XM9VSlv
+					9R07P9WjJVjO4viGtAfvbKVNOYyLPe6+e/Na
+					lIjYv87EAAlV3Hot7Pzff1duRSM= )
+2BMOOQEUMB3KGE328CJ7B2Q65OPJM8DJ.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 2CIJJH4RBMAISUSA1TH02A2RAN03THDQ CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					HWSQYMuhCxYWm6DVKRwnik/PYwQmdZhOHMmb
+					P+Map173RzL0kzCqGzpokaDmZBs8zZohgvMs
+					UYbQss8jnXJuAcyRF0dSc0IVVeJLUAaipJpi
+					kmzyIy/+ANxsaSeRgKvkGecFT8dnl5xNQ6F3
+					vbBwGNQ34VQHNx6S4a3Qa/vBwS8= )
+wwwtest.example.com.	3600	IN CNAME www.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					2kfR8e8X0LNbTyPg9fe7vlOknc63ksjBRECm
+					pCKNFqSMXJ9gd4gbB2DKHTQLarAQx1KOy3lA
+					OezcuJS3WKxF/ucZDqkOaiN/YGJqC5GZ1jcW
+					zcCahY8FAM/eJfjbZpdn8YowVQy9f/1m+agl
+					vsHMD00nflPUyFiRmoik1DAWoVU= )
+2CIJJH4RBMAISUSA1TH02A2RAN03THDQ.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 2E74KFMC0MPQFVMLM1UD7O7HCEUV01TQ A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					f6Gj3qbdYjC27HqDBLv3Ip5Gf/j/GJNVko3G
+					XIVrebHqTPUssOy81/CRElLstM1l1WzX/KTz
+					9Pzu5e1qmlYk4Ym20mMAyihWON3/IJk2GI8x
+					TDR4tJ3DBWk37l1S4eMhjv43OSms98GlKfZl
+					soYKgv6hwPyX7si1FEL9gWTJjio= )
+2FIB35726VOBGISOGPQLFO6O5IRN3M0G.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 3JL9UEM86R2IO5RMPACMSD92NTVGRPNG SRV RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					xmeQ5RA8LUt1UDtfFhKdTCq6ean35+UdK0fP
+					OIb7XeWcp63YVS28l0uoud3+HjsB8VSF/FXi
+					PpJnN/kG6Xk/+sdTDGuObtqlAI1W6/dXgDcP
+					VdbGNo4uPcJsdkQdCgrQs0oxZCwpW2Q69LWH
+					yKLTVO6avq/V9DiNOPjTSG7Ix8c= )
+3JL9UEM86R2IO5RMPACMSD92NTVGRPNG.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 4F4ISAF7SLHE2FVS6IH2N1HHOCVUTMTN A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					JbwLpP6KcZ4UbuR7vmjRozuL2uoyp6U1HP9L
+					tRu6CH5CJwMa0crXBM6cCg7zm4PkSxyQBMSV
+					lt+T3lThVSx6HzxGoDAblj5SiPF/SA79zZW6
+					g9qFAlLQ4doeC0CesjeOPu9bL37wtWJIZY5P
+					3LhYhNN67PYAwGFl+s+3kVrLiTE= )
+p.example.com.		3600	IN CNAME a.sub.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					eXmvtean3kAh6cJGtMWPfzVlOC6cjaF4IgIC
+					UnJruUTcL61mR57nQKxBD6Fc6/BQoVMOvP2n
+					Q19akZQoDvgt/p/Koo3vUozrCzLvkj1n4oSd
+					R0fSl7PCBl8Rf1TMuvw+7XvQeIfLq2c8INL1
+					PONXmm/lkgqbYw2BJxzx5tKffcE= )
+6A3ESFQICSC9TLOHO0P20QB3T0H8DHNT.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 6T8FEOHJ6MH3O1N4B0H6AES9842FDUSS A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					kUhsVZbbmfkCczTv/wMzX8sbPn+5VbR1r+xE
+					x8YvzZ42zof62wIvS2JcwXCR2GvSi9LVKBQE
+					3y1g548Y8n9moXC13MP4F84h+5U/VAhyaPpw
+					e2TJpBnMLCDjvMUXP3XQKQzkdiV3UaLFn0aP
+					khwT6nh+TTPYeREjcSLuyhWs8Hk= )
+74EBGC37NAC14CAFDT47M48A5JSFFSL2.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 75DLOF6I4571LIKU0GLDE5T49QMEN8IG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					MtZCtVby4Hprx3spzSglrUqmPvvreRDrKXhc
+					0xaWh27f81oGsnek+jDYvaw9JIdDcOAQbonT
+					2nVy6s6Jmrjt+7pWSGPkuFGPgybBrH1l0Rh3
+					QmODDmVDueyTMSdEpfe+Nw7+zlq7BI1qXe3T
+					fBoESwb73RXgOQ4VztK0/XXk1wQ= )
+75DLOF6I4571LIKU0GLDE5T49QMEN8IG.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 7GD2384TAD22TQJ5ULAC03C93FO12QF0 A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					zukfY1bN+D7H/q3QKmPz+rRRxofgC1ECjbxL
+					ZdG0NBT/w2QL3wRLe5CDmy4hNsU0Iq3xxeel
+					7B4f/CMkY+F7WXBbFwsi0cLf0gfN+VOMcFR9
+					700/L99AUw8ofRkH7sWNj0sfHB/CHSC38980
+					u+n453MvcT31Svt6GwBVtt75ZOc= )
+7GD2384TAD22TQJ5ULAC03C93FO12QF0.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 7NS0GBBS9N6L1E3OM48637F6HOKCOLQB
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					4nqxLigxKw86DpZ0KAo/k0507oWoind1FOCV
+					GDJvF+YejkSuvJFpAtfVSUrw690XZ7+zyuoV
+					05e7BH07rcJV9TeSTgWe86nIGegDr+yzZBEZ
+					3eGsbCwHxrR9ROieVBxNpWnfkVrA6MFqHZj1
+					trAY6ajLrb/+kQEBaBdPC668tJE= )
+6T8FEOHJ6MH3O1N4B0H6AES9842FDUSS.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 74EBGC37NAC14CAFDT47M48A5JSFFSL2 DNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					i0z9WCo2snvGjQJvl2ZOkzg0PwCBuCPlDZ2U
+					NTbw3k/P4N90yVYu7IuJVEOuwPNaKHzBnz1u
+					2vzYxM/fJHkWi4FljRFGGHC2ViBKJS+li5FK
+					KVUXwqZCHWlEc5tZ6lrpFTv5Q7h0zC6M3gSt
+					kBl8r8CZY75Yls/xGk7NZDd40R0= )
+7NS0GBBS9N6L1E3OM48637F6HOKCOLQB.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 80I3RRJLHHEFK8HQHD2A8O6VBHGKBSJ7
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					VXcnf/ptpsoJgahBd0QYFkxBqyBE7ZOPNFJO
+					jT/fh6syVGIuV/FVSPY5c24RTs0pU59FPW1e
+					Ce1bDLWR30pyZfXBrwLmvjwn6XA+RhYtlBu2
+					vE31i9zr8pSnZ3GU553zE/30J3ggO+WLQy6f
+					sLMmPynGnACOMz8hwvAuqATLswA= )
+9LF5T2M8139TAUL9LBR53N1RLU9BLIFG.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 9T92PKASBK46QUITTDHH5T7U73HFLO9A
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					vJJLcMmUHJIKxBS1a33EljJpocAmudNOZJ1k
+					KKpoHIfhN2U4b2GbaAQRbPIttDW14dmwuqZg
+					pi//Vm5krSx1PrVWoaCwvyn/9Fey3PcY4zWX
+					Rj5m/zgMrqnK8mVdnCVTcSVwlgpcJrpiYxxA
+					5/Lj2MsiY9vf2Gk9kcYqyg09iqg= )
+4F4ISAF7SLHE2FVS6IH2N1HHOCVUTMTN.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 6A3ESFQICSC9TLOHO0P20QB3T0H8DHNT CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					QO6x9M8tKx9nEwTGTLOmWJm2ReQWdDJq/s8x
+					CyLc8W1v38iqMgP/X0e+un2MicXkG9Xx6bn/
+					KBCMVx16q9MFfpdyQaxvc3w0ZvRliAupP9iH
+					pFS5igBe/BAnUS7O6jjAaY03frbz+JaAmNUU
+					qbyEm+nfWWDWmPpVgU9qMTh4Iz8= )
+9T92PKASBK46QUITTDHH5T7U73HFLO9A.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 B939IPLCHDGHKH64CLV0F799P2QFKODM DNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					b08XgQYnvasffMbun6yS0gohnuJL2TklNPf8
+					AA+2g036YcXQeLTHHMgzgxrpUTKVAnBP8G4U
+					gWD+xRwsys2q4Ws14oG9SAos+YEcus8AGs+7
+					AFtHyOyBmRwOgP90Iu4W27bpIYf8D0mTC/vL
+					JDFkAVYzcL5DW7Rx+pr2F8bqY3I= )
+C8BNH0HKUBJF5F9Q6TV3BLVDP2H05C7D.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 DB9UE21NARLOFV0U06U8CMVKP4GNC10K NS
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					bxfqIBTAIogKzXbyqPnlv+MFIyoYlIT6knm7
+					F6BZp9Q0VXNgVM6dEU0THhIzPvaMszn55Tg/
+					lEohKrDuFWgbEbWpA9CQEm3LFLVg9QYuYl4j
+					3Glym7TdGl3PDGagEpmHvLHx4gKbnqZWtN6J
+					uudu2UAlp8EUP4BWwsCsbnzLk2g= )
+80I3RRJLHHEFK8HQHD2A8O6VBHGKBSJ7.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 9LF5T2M8139TAUL9LBR53N1RLU9BLIFG CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					A2sU+74sIE4X4Ai2pzJPngzssUG9q6FTrBA2
+					ZcvOZtkzS1hY9OafSHoyKonqlRC9A+tX8Ny0
+					by2M66eX4NvlinGyBJWdC5Ekj1b5cMy6Pcig
+					zcMAGsj91MZOqA8gwKiJ8xRGF/LUf1YdlQAb
+					qD2MLj83BSzg2m5lXl9EVMLmQwg= )
+DB9UE21NARLOFV0U06U8CMVKP4GNC10K.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 DE3D7U7081COUA3PSVT8MLFDGNGNMUTN A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					VPzYwah96Z+CrgO1cgRHzAe6DCDbn0wxGvfS
+					X7suIoXVhz71+PCksxmBzXCjEX8hkta8bfgy
+					KEweSDw/PAGeBq/gktmx4XravfhSrvcdxfyC
+					jaJQDfKvf//iJKujR4sP1crWnTNKXNLNO4io
+					AKiecOcs5L7FFLf/mG/tkRrZD4g= )
+2E74KFMC0MPQFVMLM1UD7O7HCEUV01TQ.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 2FIB35726VOBGISOGPQLFO6O5IRN3M0G A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					k4LLw681oD7qIr/GUupQFuOlbUJe0XkH5YHB
+					hG19hIy4BXPGYI0UEaxLnPcLsvhLgb+sdWTG
+					JL1JrRcCMRne0zNMY28sAzO1npbtN9pd9oK5
+					ZYe5OK6wXpIvziGdJ/2eUVEmV+NrSJREgPbO
+					krsX8SxFss/S5i3C+UoWHQd9LoU= )
+EE6P9GRHC60PKN1E34GP2GFODTK9ABNL.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 ER30P5E30F7PBIBO9JHDUD2ATC20OKNQ NS
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					N1IBfELSSlFUJwA9WBo0CtNHwvsWrDnVTUGv
+					Cdfz3mp4H1CIUtKx36zX4CJeVXtwc+zWgKki
+					WZvpc00L+uvP6tIyMwGeshjd4etY5DqbnIuH
+					mCbIxGpVqgjhcAahCogG0kHBnNWkHYD37SZ7
+					9J/uwMoNHUGqpEKiy9PeIHfX3zw= )
+GDU5SE9F3JUO6HF8AONHIVJI53NAE301.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 GJPHM3J2JR55KMCICU1NPT84KMP1C4UU CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					1M5Lz9VF7zkSQWN+uUUHAvCIzj54/eRvqkkV
+					XLjviMkQ3G90qrS7Ro3FN35fbVdgn1sets/r
+					R87yO3TpgNwWjcBejT0KQXr3VI8me/Jr/yID
+					HlXpfkJZi7YfOs7Us7pKwlzXz6Ox90qtC0ce
+					8WXbjdjrmdpiLAsdZxo1miQXTZA= )
+ER30P5E30F7PBIBO9JHDUD2ATC20OKNQ.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 GDU5SE9F3JUO6HF8AONHIVJI53NAE301 NS
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					TKkytnNfTi8pvoqjXO6V7CY20Zr9oosNb1/z
+					3X7s5UBDZh5KR1aSDjFxt1FrY6+SJkTGHfC/
+					3pNerSIecbMJ5Y2crLJReXFt8zafrL6SLI/a
+					2QwFVuqVWzacwN+0rSxCqcz1tUPcztv0KSv4
+					87yK39umtsKCQ76PaucVtj6DNYk= )
+GJPHM3J2JR55KMCICU1NPT84KMP1C4UU.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 HOJ16G88JKIIDO9ML2CJFV5SNJ8BFVEI A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					QYhzXTmXhrSEsN6ue8c0NgSTaLXVyauv8cTW
+					WA/Wa9MDa3+OzaI/X5VnDZOumbnAbX4p1EC3
+					yHDrXC+QnQrgr6/Gj9rqCaNzyXKtmBYIGUvV
+					DZ4ZRayXeYc/18GgWrCx1gBTUsjsqy1ON/1K
+					i8R/aZhwzcUvWbqr1FlaTLSvk78= )
+HOJ16G88JKIIDO9ML2CJFV5SNJ8BFVEI.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 J2A0018O0QCSI08D608LDVJOLPTB3G96 CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					bnvyEDA/snJUVw5jBhdMZ0ajEE4kcfiXVSM/
+					P/cKiCEMgR+xhDrz4sUSWitQHz75QXLybgSj
+					cjU1XrjGP53kWGb3YEtWaM+JaqV/1yZEdCDH
+					ny+zyxcI0foYPu/4r9uqTWB9VLIRHCQol7kJ
+					XHu88kXYdu44hdiqQf5E0+VSdfQ= )
+J2A0018O0QCSI08D608LDVJOLPTB3G96.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 K3MJD76QQQ6H0RKERHB88S6LHEHOMJRV
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					jIknVULnzmGn8B3LoTKcuU6ELNYyRLagrI37
+					XrnvlLjxWcqNk8W5aiNcVMhfEjlu6F2zLGLU
+					4K4KLV1efxNfJpcp5Ki0lNS+i3HB0rkg8dP2
+					j+UCsQ9wHbwzZNSbDli3/kQzEwnHvuuy9f5t
+					WCEXC1dwVt0QDrVu9yNVgXuW5SI= )
+N9INKG4137UMU0NL0U8V5FOTD66UJQIN.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 OBT94VQ2BVN9NBPVL65OCARNBQ92R9NS A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					P0xnjLy1AbyOUDyM1lbApfQxQILKU9m3lVIR
+					6a419fA3jkFcBoB3A5ReXWFUW+lYuVGAL7cX
+					na/QB4J+skak7oEUz03Hoctc3eCR/ud7vobY
+					QULzq+cHzFsDUFC3b8ie0NWMZH8GNRGeHS0T
+					FtlHk4mQofYwQkF9Dbzdwn327iE= )
+OBT94VQ2BVN9NBPVL65OCARNBQ92R9NS.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 ONKAPQRU8HJED18U7QPRPJA8GGKP5RCQ CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					uhM8yr7khK1/Ii3buLO+oHUY38t23CcSApyP
+					RUefb87LREQVtcNh26Oymd741/NfhvZmhop7
+					Uvx0CxSICmjdV+u8Pm7/fbFK1Ha5m0/UvrUo
+					0M4QNEGS8Jbs+xsshr8RbaBCpUStTCxz5og0
+					E4lFekJEXuqT7wa/0TVBRyzWIQc= )
+DE3D7U7081COUA3PSVT8MLFDGNGNMUTN.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 EE6P9GRHC60PKN1E34GP2GFODTK9ABNL CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					onPGqq1wHK4TnzDM0stR93s5SsCWFMQh0l0u
+					3lVmvEh8T93G7OpfSEhRoQ9td9o5NxHSR6V0
+					4xxgDxvnjgMMbvDvgyeHLtnmRaaJhC6xL6jy
+					0UQYb0Dz5S5aGocR6tvgDu8vmDgEmTx7zMV7
+					8vdwz2epzT40MX0hGAw9YhYdQGk= )
+B939IPLCHDGHKH64CLV0F799P2QFKODM.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 C8BNH0HKUBJF5F9Q6TV3BLVDP2H05C7D A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					nUn1EpD0cHWC8C9RnfBt4wBepa+DGQFU3nKU
+					2+75RSeL1ltptxuuUmhmiBindtODFY10rdtP
+					TecPL4dsG5CXIZzx1zO0OMJalYFyN3MAnZXS
+					ENv/K7bWTal6OqVjxsYfrCqCcEmYW+8+0b+1
+					vUhfqqaIAdCgVGYrzXMDoQ80m0A= )
+ONKAPQRU8HJED18U7QPRPJA8GGKP5RCQ.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 PO4K5TL8FC932CHVR1339QMSVCG8TFE5 SRV RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					d+sbaGrwmTVOfTajPdsD9NHEUpLXjjJ94Rpp
+					9HIvdJozkwPOP4nUt2lc3lZiJ1OhK/GbMkHZ
+					wFlkPKmGeBPoa6FARpYuFj1DtDZhWCd+mTH/
+					VMSzGiX8InCQGoTTiufT1G4aSP21oY+UtduF
+					KHJYikaPULyWgWjbqOpoO0OxFtM= )
+Q373J0K0LKK0NE6QLDMCDUMUS4D7N9DF.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 Q89JNCJ55KEMLN012BN386RRG5V35MGG CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					ESQkjbD7LTon4QDSN6tZwU4ZaPopzvIXfJ5d
+					3UorybWbBVrctR0AR4mvjuaY8jPuxjcn3awh
+					B/RwtlQ2oWrquPfFdinx60v6hmbhFJRSzIM7
+					ob6tJObd6Be775r8M9N/aEi0ghtL7qv4BO0F
+					3aoN1TKFHrFB58uyjmtNUBYtE2A= )
+Q89JNCJ55KEMLN012BN386RRG5V35MGG.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 S6102U94KPK3HL2EEB1KU341JC2EMML8
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					s9GsCDhpCzdFG/lnYS1EXxD1yqW1Rs8NFsZi
+					ht7zt0qu+AlxFXZ5Y9rC3joPYzoVgMH6f0h5
+					WItWvGHQ8gBQgjel7ZAKVSAdinYcyvXyh/g5
+					XQ2xwbDHi/Gx736y3SNW3Ivr3vRRNQ/ORJgt
+					SQ0ECCQbhRryNCz25SlDDAxbs6w= )
+PO4K5TL8FC932CHVR1339QMSVCG8TFE5.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 Q373J0K0LKK0NE6QLDMCDUMUS4D7N9DF A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					cz7WE3bqo5gy7MGC+CCp5rQq2OmWp1T0fb4z
+					SA3kxsMIEh8CDG9B3ETauKSvBokyLHT+WVC1
+					z96F1BiIM+ZDey0IYRDc3EGYhNBgdNGGan7N
+					GvyGpzTlwhBZAZNvn0Ledn9W6dI8DLBWEIbl
+					LFaBFwOGseR2VUp2u7yla73QTP0= )
+SEF41HBES71QEAB5G8DV253ODMLDJS10.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 VCVTKD7HV5II9DCBRH6O7O0FL9NV6O88 A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					SWIZLy2XlDbDRqN7UPOrWMxnc5MHzfw12I8A
+					VKGdUlXhOVcVEwVVAk4A3bXihVMP5gG5Z6WU
+					sLYFe5TOBmz66OjRmGNVODQNHpacdHeDvjQo
+					f3KcbWbl8CGH+uLxjGGkTpZ8MhJ8vm9w9cBq
+					urAsJbO1zFHDJi8zi9dQknmfJcQ= )
+VEK49TJCDQQ7AFSAH0A8MMF4EPP0LVFE.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 0J3ID6U2GQUPOADI9B867SGMROP8U4Q0
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					bSvFoFDIForjpYjxvmq7au1hq0oyL5mSC5zl
+					V/4WXGT9lAYk7wOZUA/8jsp0BGha9deH0G64
+					fTAfxt0OOuwibgqjXOEL9ioJ+xjk0ut1YQqc
+					lLenWNE7986fNLKihLk6CTIzXDRORqOp1cS/
+					1ZmeKTA5zT8oM7FUwGmxPYLjozc= )
+S6102U94KPK3HL2EEB1KU341JC2EMML8.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 SEF41HBES71QEAB5G8DV253ODMLDJS10 CNAME RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					LMpezs03lkHxNunfHXUIqt5nOhUVclymGgvM
+					JCqFIDuUyhi6pcOPm4lxK5uPjxl4H5rdBRQ8
+					k0H3Ms3a4u0/wCFVgoZxsmxRBKuuYg8Hy2DY
+					1wA8xshYi//tMqpSfaPn1qWOQ4H3Lmk1QQ9d
+					7oS5xbj8LbxgRy2nHIMq2Tu/PLA= )
+VCVTKD7HV5II9DCBRH6O7O0FL9NV6O88.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 VEK49TJCDQQ7AFSAH0A8MMF4EPP0LVFE A NS SOA MX RRSIG DNSKEY NSEC3PARAM
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					KtSNurYbgzIR4o419h/wdNPJmiCe/N6V8Qpn
+					lL5L/ZE5JqnAq2MKdybxHpSwojGR2pTGehMc
+					GV5NEWqyK2TPN8f9stwJ0bH6N1/ab5iXe6Kt
+					F8zHjWXMDt/dwtKspsTt1crkXaI4qduta4Rp
+					IKoL0b5PqVr3vA4hvwAwqgYe/Zk= )
+K3MJD76QQQ6H0RKERHB88S6LHEHOMJRV.example.com. 3600 IN NSEC3 1 0 100 8B3F579FA62A6CE6 N9INKG4137UMU0NL0U8V5FOTD66UJQIN A RRSIG
+			3600	RRSIG	NSEC3 8 3 3600 20110331084524 (
+					20110301084524 28635 example.com.
+					zyqm5HgDE1CUqpY2D/UcceQ7GmJZvyZn2uWd
+					9S9/As+NIp/Pf90E6bnhpPu5Hn6H34xubnKk
+					G7qH3IE8JcohHw4zRIv1kW4u0CLikBbNq+1d
+					rDkWz/FDjsV5QR+nxLlaGwkO12wgDQYSZwNw
+					ja5DoRdcCKz2T1jKcQ+NNr0j0Cg= )
diff --git a/samples/example.com.zone.signed b/samples/example.com.zone.signed
new file mode 100644
index 0000000..851cc13
--- /dev/null
+++ b/samples/example.com.zone.signed
@@ -0,0 +1,571 @@
+; File written on Thu Feb 17 11:19:57 2011
+; dnssec_signzone version 9.7.1-P2
+example.com.		3600	IN SOA	ns.example.com. username.example.com. (
+					2007120711 ; serial
+					86400      ; refresh (1 day)
+					86400      ; retry (1 day)
+					2419200    ; expire (4 weeks)
+					3600       ; minimum (1 hour)
+					)
+			3600	RRSIG	SOA 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					T8PgPaLsdbkEfZvPHPvYV08y73yoEGqQuLOl
+					db4jvv48AUqt/Q/6dLMcWz6lpFDCEyf/9aCl
+					XVBhS+PAo3ex8lXye8MIyGvh5/yGFUveDHRM
+					TvigNYz3iJnJj6aK8nkSM29DUe92pkx2m76O
+					sT97uSoh+8FX8Vz4qRRBD6NwVIQ= )
+			3600	NS	c.a.example.com.
+			3600	NS	ns.example.com.
+			3600	NS	ns.somewhere.com.
+			3600	NS	ns2.example.com.
+			3600	RRSIG	NS 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					U8RogXPsS5rAUPbG0d8Wcvdk2NJ5ccvK4pda
+					jEfvIXXgZIib3T+gR+PwDuK4sMV2rQxsmcrr
+					qz3Vc15SQhyt+DAXVsrTojT8iu0NJXEZSr/H
+					ntPu2/BfVcHbq2wTu01QW1g9/ub0yUltbkcv
+					Mt8ZGiIyF5AoChy04SmZVlmuHSI= )
+			3600	A	10.0.0.1
+			3600	RRSIG	A 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					RXbKPkFlSJLiKoliNUC+tlPKru2UZfdksz63
+					Jdla5qf+prYU5HZlvMLD/Fs3dSmK7vx5S6gh
+					4pzWAtI0NZ7NoHSsxk/aztoASeal0On55yCt
+					9lXRQ+Avzl7Z41fyFTTdu3GF+tOfAoPuTegL
+					qDLokpWQTRfABy8zFIQvVvLWAHY= )
+			3600	MX	10 mail.example.com.
+			3600	MX	20 mail2.example.com.
+			3600	MX	50 mail3.example.com.
+			3600	RRSIG	MX 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					Skb7nbpNawsKpBZBC/4vVXUxioxbrPggr+Pv
+					EZzxrVcZN4PNL1vLQxWLKaZf9p0VWjFUh6Y7
+					pyup5y8kL/y5PBM75jTIx+L95FlnB+Cef24c
+					z4f5eqGTteWxqBhp25ZNGNxs5lI6wWJkIObU
+					2PHjtoZyXEGcYYQHtC5LQVQndbI= )
+			3600	NSEC	*._tcp.example.com. A NS SOA MX RRSIG NSEC DNSKEY
+			3600	RRSIG	NSEC 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					cM0Oa8GL61RYfdbLp3P6dH0gU2Yp1hsPvpkw
+					IBCcJ+0MNbZRxCTBnMBxt6VyBBAu9PPsTkgN
+					1TdFmu1kD0fBP2bYAHrVg7xul7n9xoCKhWhx
+					x5Kj3bQCKlWL1AfhdH0fkXGyY4D8ufe4yItK
+					svm1y0TsIHnXO8aUrh+DOxyp4rE= )
+			3600	DNSKEY	256 3 8 (
+					AwEAAbns20HerHdgnwqTXVG1a3764I7hVAzp
+					ahf9AF2dq+f+/aC8CWwow9BxU2uUSxDGj33c
+					6LQLaJm9gx1y1o5lB/0iM4Oui6/xfx4xi5vR
+					SRE4fWPnWexH8SeHQgQOaq8ALUQGwIQ1l1bP
+					lWNKDg8AL1ohQERLQf0Skpgi9psrkPNR
+					) ; key id = 46476
+			3600	DNSKEY	256 3 8 (
+					AwEAAdC9GxD5zDPcTe6UdoZp+rm9EdFnV0mI
+					z/zFz8qRop9mLq/QBFaYsjpQdOahHQgk5FtH
+					OUywUaDKCorZuw8dH4iWpt/OqW79l8KMCNzd
+					xTV9Qky/ZRwO7Le/LbhsYgzw6eSE8d1xOUrb
+					3w9PL8Zn5/059TE4yjmO8W73AZakgMtL
+					) ; key id = 20058
+			3600	DNSKEY	257 3 8 (
+					AwEAAdA0zDQsBM+2/OI8I1lAmAvdf8cB5jiS
+					wyyrjRjpWHlMQYiNXNTigb7fZdTx1SfX05Vf
+					yERfWy9ACRcssjf47rQLvmvE+sRAP7mOaRIY
+					7CjD1kQCTYf3TybqAX5/MXZbl5OibvS4hpjj
+					SYO1lg/tITefq/Z1JpNUnyzwiuzQbu2MUytv
+					qqnkrVIBp0AmPenomFmaJ7chi3s9TMrkiBvc
+					58S5a3jEvQR/U/B6hw1ruCP6EOhBg/KHApPn
+					eVHeMCtv7LLf1+xNQ2j6k3N5sCXQ89EooLO/
+					WNsrCmbQE3zpwZsa7pCC8LW7YQowTtbjOIhZ
+					DsatvWPhGGUaCemoTt2ceH0=
+					) ; key id = 49540
+			3600	RRSIG	DNSKEY 8 2 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					RW5kvcZuCmlM8DEb8teYpTRv8BCT87cvrlv2
+					eJHlnIT03wjUVJx5pLr9gYrL1fjua4zGPLc6
+					8MjssdVoiHbYt7pZ9JVnGgrfTSMW5emkyu3+
+					FazMDmCpMhy8GN6QyUADS9c12JkanNR+ugwW
+					i2IuR6VSZbBEbgK7wizdmu3yt58= )
+			3600	RRSIG	DNSKEY 8 2 3600 20110319091957 (
+					20110217091957 49540 example.com.
+					AFg593dFrLP8EWKnKVQCpt+/rufL8mCTe/Ks
+					NozsesatF/B0LXkztK41wEFczeciTJOMlqcp
+					tbuaTUyiC0Lnz8yzAt1PRRxxZrjr8CVbwHDn
+					SodKElpfRA9MEFHEvphD7s8gnzCEVCQEw2zo
+					8IbDapCNAADx8pDE976/ixKWca1XNbXGUUwv
+					LSKZ/pbNd4FCd8DqG3B7vcmVv8k5bGcJXdlU
+					v8OlI2rJXr9yVs4Tb/LgncLcDHOHg4TCKE5e
+					ssQ3qnAwC+PtJGMl+UF2Ar5Ue2JZXijkcgxx
+					fYYqB3yFaoxfn7neRE5CdALY+kMwv9ySkXWz
+					1+D0NCjZGKIdnZCAcg== )
+*._tcp.example.com.	3600	IN SRV	0 0 0 .
+			3600	RRSIG	SRV 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					SZqwbOWOrGh0PB0st0OwVICwishDYIwM/VE1
+					3yp3/WboQFWESfrpv9QOfPD19yet97Zi17C/
+					vQ7YifNWm/pKHOfvlgAMd5Y+Vku0Y7W85M5j
+					SsqjfDoiS6jPWKtHswVq8MRHIpRrCyLY7ZTM
+					fGp2A9SRGTa/vFyCgbvu76ampbs= )
+			3600	NSEC	_foobar._tcp.example.com. SRV RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					B7lFuz7YrWCvuTs5wb0dA7a+FaKhzQnOYSAr
+					4myC1mVFpRtTsk50n/NkUBTSDBoHjfDdlYU9
+					DRBBct0PZTmRRv5EX0Eiw1BVs4mDa7WlYfFq
+					Xkc9nhY2jjOFbt8HTLsOdAahXV7VxQBHn8/w
+					ewrh0BvaM2Z/r4OHUqc2DVsgr2U= )
+a.example.com.		3600	IN A	10.0.0.4
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					KMwO1EvPdjDW7LJaKY85TPtUogFWA4IWQPvw
+					SKNX2aADOanzu/gnY2tVOhDq7mWJ9tQXlMtx
+					TwsAzcp+1PdEKCUjEBC53YQI/L1s3opKBl4S
+					HTLgGCKw5KhcALeWKGVJp4bbuuDFzmkpP3dw
+					DX41E74bR1qFeVofwcjuvQw45hw= )
+			3600	NSEC	*.a.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					p09gsGkMo8QSE1ujTblgmpKqaOk6X5RXsIsi
+					8oiOgpNiMfBIMAYNd4T8OqyAEoygvkqw4h/U
+					GuRSlSI1vFUzcsua+lVd9/WfbQ0gjWw9zzGL
+					rfku6PS+skQZPfZhkTh+a7TnUwoHb3K1sY5l
+					tM8Cph4mXhHJbiqxdAiQqjlSj7k= )
+*._udp.example.com.	3600	IN SRV	0 0 0 .
+			3600	RRSIG	SRV 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					IG3bi+NqZUHgSG0qyASuEc56z9HVV1/TMCUM
+					dMTBMfsMzG3LqI3qonhRGPelb9ELDlowKnXC
+					joMXetqLNPpsFsc6tO97yxmkDfAskAFpWmUu
+					UQ5lG5crlwJ+6PiVANXtrNNZnsMp/jiDFOoV
+					b7FrF48gfkt/8E6Mzq1nYKFn67I= )
+			3600	NSEC	a.example.com. SRV RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					mQxN2DLH/YEO2bHnvKaHqhfJYkx3HHgqD8JM
+					fRbcRX/YDNY0oy0b7VNfN1J+4FYdCZ8r60eb
+					39dFigjiSEXNXmi3SJ6X6irqv4ZOXwoxtjtk
+					CzQV5GsKXnERFcQ5SsCwSbFNik2R3gb3kYuW
+					qqvYpqPSVA+ScJ4cdNXODvL9zag= )
+_foobar._tcp.example.com. 3600	IN SRV	0 1 9 old-slow-box.example.com.
+			3600	IN SRV	0 3 9 new-fast-box.example.com.
+			3600	IN SRV	1 0 9 server.example.com.
+			3600	IN SRV	1 0 9 sysadmins-box.example.com.
+			3600	RRSIG	SRV 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					jIA+72DXdYMsWQ45Sv2MBg0rI3rv/7oEqoA0
+					rJ9X4la9o/ozwca7CJE8HKP6l43gzns1pfZ7
+					+QsYW5BJOOB8ov+cCEVBW9XY37naNa8fKUsK
+					Mpzo35gaQ1zi9+FnseAwZ0WAicl4+766p4iJ
+					MzDEZA9VXvSMq36i/v8c+VMxFP4= )
+			3600	NSEC	*._udp.example.com. SRV RRSIG NSEC
+			3600	RRSIG	NSEC 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					npUQV7MbigckrB6D4jshTkGpOvZY4XTulYP1
+					EUjN7Ttr8i56UEon3zzVY2ZUK4McyNrkzWqg
+					KPoFNG8xwf4bI2+WxdJeYo45PPZsy6bDTbMu
+					lYc68hQ35r3ok32SPG4GMuV53iuSJBCNrM9o
+					Rat/FL4Qoqzy+sVk1+tnz2ShzqI= )
+*.a.example.com.	3600	IN A	10.0.0.5
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					iHMA40EdVEV0HIxDKbxcOe74roa7X3Vi+lpr
+					XGJWx0gbVVhMsGdXi8YycbWAyHvwxImiU/VT
+					ZcDiDExzH89XZbzmEtP5vjAOBaf9rQu7cFzC
+					mAekgEEccVYSt6QLJTxcdk97CDRNkbU1kd02
+					J09lSSyQL8ATADXIlWFUfMC8Fx4= )
+			3600	NSEC	c.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					NKYN+2bmtp/2Bfic6vBqWAC/ouTz4qEUgdw9
+					a153VST6W3UpROG/xiKV/STmURt8oYIzHy42
+					UDRp8DmuVRMgeP7CCCYDmFq1+hSHv7iia79k
+					bvrSqdEbfaAjBkHMPlJyd3VjqKz0L+Q7sOKP
+					pWKItsBruF9UTJMP0Y4WLCvsD1Y= )
+d.example.com.		3600	IN CNAME non-existing.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					KFfbRqMSwZOtr3plXJ2E9uKvEZjop9wpmq57
+					EXq4Pus6pBhdPXXgwDo9/tDsTj6woScdlWyk
+					BsDYRIVfcu+jBbyTdFYSg2Em2A3XwtTxHD+s
+					wL3cRc7uKHs/FsWDVldxvrKy/ljX/kdmkiHN
+					xiRCWZsPa6kxB3/KtDRjYO6pkCM= )
+			3600	NSEC	e.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					HbB+j61LK2AzrGmeLtVFRI4Ee+9dkh01xY44
+					AHWKIEqqxRA95yOxWYDwVXXC4F1cO/UN0nAs
+					pTZekW8qb3vGrBUytno3mYZST+RHN8KcrWwL
+					n0nXsidEekA+ZGxRw7eltu8ECYX71C56bqp/
+					DIilbcD1+bIyGxFHlYN77l+nVUw= )
+e.example.com.		3600	IN DNAME bogus25.com.
+			3600	RRSIG	DNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					SKLwv2FArbnNXXjaRxHsw3YcqYBxPNL/EETi
+					6rKHVHHOgLN/IwQ6wLtmXZfRSV3Avw0pYmgt
+					6hVda0mnJ8M4BPRal3z2cf9+PVX/f9kJWUNM
+					h1A/ibKKIwrhcdh4Z9s7QXGioE6WiEViG3zP
+					pfkajBllmOrE0pEH0YX1rWValCE= )
+			3600	NSEC	f.example.com. DNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					swVPAYAboz3U8Y2Jcil1R6jUIAHggZlrs8I8
+					ky7EAQTFYDRhLBC4UeGO+6DpkHAKCGepd2E7
+					yojy/wttp4VhBxcaDGidc94z59Km/wuxF9Yk
+					cCYv7Ip6qLpk8L4CJOJvkFAGWTpkOYkA1qDR
+					tQ1IMSOsc6s1xaY9pd4vxmZkS4o= )
+c.example.com.		3600	IN CNAME c.a.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					hlO9jq8fIGbacLj9oYvwwyz65+z6ttWGg0Dh
+					wel26v08PEEJ19wVcZsXwiZi5ey9xaNG0OfC
+					z0xeH4XCOYaFGtKjSAqpT1FLGmcFOqhbGP2+
+					4pxICNlMonG+w/p7YePr5jyDILbTbUmp62Hc
+					ZoV+MVNvjFpDbxgHvCpFoGZguqs= )
+			3600	NSEC	d.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					yTCDrpHhmnrwD8HxGPwPAXCmCik9aFyfESjW
+					7bqrVgo8/pH57JJxGw1FVdoP46+ba1E0XRmo
+					zBdKKjum19SJBV5rzTFsJ58TDxsIeXWgwZgB
+					+RKY/peVIEfhuBHfLhdPocWB7rrk0dCDsLmN
+					FbmhtNkmXs9CKLYv/ucsXnEEyYU= )
+g.example.com.		3600	IN CNAME www.bogus25.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					PCl2njNFV8UQjnI5C5QUOE4IPETqM3orSN/e
+					B0WhX8QRvYRqJgayP07tjgaslUIzpAWo4t/J
+					+R1bjfkj4w0Kxk+eABUgyHBq4Cd1EO82L88L
+					DVvrDAXxg7Uw1dkeeN8y5ZuJ0tK71AE7XJ7u
+					YdTpbi7cfwcJuhRY45NbZDVtLd8= )
+			3600	NSEC	f.g.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					zVhwl4EzpNuLNvPr5y5m8hIZyjhMzHSMNPQz
+					gMqljABxOeeNw3r5y9NZzm+6vczJVuJstrzr
+					n99bHnis0CX9QHZ9JMyZM2+qDLqvFccjAqTF
+					TwZBRhYODrI6u61DiRPCum8J2sIiEwIOVW8a
+					cDosel0Kz5cckjLJmyvew+vI2Hg= )
+f.example.com.		3600	IN CNAME e.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					QLcICtoOCD6eqtqDlawijBoRkruFxtOY2lv5
+					nrkQoZa0zarM4Y8Zs05PPjMnFYd1kVgDgzNq
+					4RU3jd0bMM6vdFBDfg/HV1OK98nvA9upuFOy
+					Mn4Ll98aSkZ9rBW2nHMK0gxClGZBRSU0983v
+					+vcSrrwK/Xr5MLYzJPCyMzmZjt0= )
+			3600	NSEC	g.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					zWPwHGblevq/icAJ2PEB/Vrexdk78ZqkQ4fb
+					sfKxqHXoXlXvXSTgMd+8jD83rpCwS9ju3W1c
+					XF0qcrw7kWVDsjuZB4ynustAWXFa61+S93Tz
+					clXNNb0zRFFt/pfhMi/6MG8VL3lPZ3seRUAH
+					sNqUj9cD8J3ViCJ6S2tD0EaWdqI= )
+*.j.k.example.com.	3600	IN A	10.0.0.22
+			3600	RRSIG	A 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					AhY44yY5dbyJvWFfEjxhksL0Jr2hGy7LAwFS
+					nM1+xeU40Z4+xB+6NEiwu+aa52ylbHkGyp7W
+					seQ0+8DG9biYIFm4QiEud/jQQIDEqYk/oVVX
+					+aJmTYsJbZFVmffWK5oG+/ncP/xfLcnPQ7Zp
+					GAvKgnnxSr0B+FNsFGwFrAJpyy8= )
+			3600	NSEC	h.i.j.k.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					aS+Z3vh9yrxVIk5w2t5SfuSjY52ylTaKCFoq
+					QP5WiZ+Ce9K9E5kenfU3ugmKxU2Ocwl7491G
+					7mYW9ZxfBRnqoA4WZtszDL5g/qGNS0UQm2q7
+					1tVkBQlMt5vXQO7e0mK0upZ2Y+6mllgvv5/x
+					EfICd8LbiJuD8PqrixsiTZRGzXk= )
+f.g.example.com.	3600	IN A	10.0.0.20
+			3600	RRSIG	A 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					EEOBQ2O31vmGHuj86oLBL5AmFAV7nVVxPjxI
+					+Xvru2Evbm2HJdZalcB8YwrFEdFGMpoxLpXo
+					FKevq2mGL0CfwifSfN6Z+lU6/m3JZQ5ugzXz
+					c6PFm/KDtCJtWkNIYtHGC4flj2rpMNlJ4ERm
+					/U/lfDy0PwPQ0QvYXZE8imXQsjw= )
+			3600	NSEC	*.j.k.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 4 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					knCwO1mKW8GKZr+jq0zT2FwlPwoK58GgvyGt
+					wvJmotKlu0pyYvVXeibowOxacDRx1SZA/Zue
+					nkA3dF83GWygxg36WjH3lyN+yaIFkuXtKYFH
+					nb/F6tIT6C26gnBJfMBKxm5mh6DqncIMFIad
+					p7ohHb/HKjj0CbGP55T6NV6OJdY= )
+*.l.example.com.	3600	IN CNAME c.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					bj2qkiCFVKzkmLafxnS70+gzkTErQgsJK1sl
+					SAxObFbBfG9eLGktw64k5XNSX1gK8cswj4Q0
+					d/XkITXMf//rVgyRSXFkIRdalhW9VlkqNHll
+					muF5PQF3bqz1ec3aVYJoQJurnjKj9YIyCzNm
+					Y5gjwqB69xzc08hUM57WwS5PrYc= )
+			3600	NSEC	mail.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					W5qj7ZHUIii8CR3sHkLc6ivln+AFK4SmxpjD
+					tgYUCWaUd8Y/ahldOzgCjzFY+I+hrUCifd1G
+					YLr0WtlNe/LgF9JhbiuIFg+SViBnLJzJAPR/
+					yTr9qENKWQABvhmd5CfCsUAW/r8q5d+q4/9d
+					P7DfCX7FosksTkOuO5qSWFHiPAg= )
+h.i.j.k.example.com.	3600	IN A	10.0.0.21
+			3600	RRSIG	A 8 6 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					IfqXe0py5ug/bM3n+L8vIjgyEF+DPCkWZ1xj
+					LmHAYjBHW8fBnByoYNwSBayXJDzpVPrlGiGB
+					u7FC78yTqNeeGKgH72D7JgNybpEELpHY72+A
+					uYKOgizlOQn+172h5pmQcSNZjfRPVtK5wR3t
+					/ZOsz44siyNR3+TQEuDTnZnS59A= )
+			3600	NSEC	*.l.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 6 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					nTUAjiYPw6Gj+V+uz7gW27lYidi7Jgu1rTRY
+					7GGZZHZRaFtoeM7ymSxZmlOdKrJxsjIhpXOC
+					ltU9dR0PJo1OnXKCQPrLjK3nIkNfGVcJU5Xj
+					MfNcdW6T1ursO2uZ7lrTOgBhSTxNNqiXln1d
+					HLwy1lHgTqNGg8QvdsbT1ixR3uE= )
+*.n.example.com.	3600	IN DNAME bogus25.com.
+			3600	RRSIG	DNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					gcuk3osH5dCvM2GgfVEogCuSNIQgQFAc+hY1
+					igrm4uTT9Q+xrwRTKVqyaIZs/TovhKUS3npB
+					4noVLbGJIlguztNvIgaB9wnam61NaFnBZRdW
+					1guOnkExhSe/dTBupdEKVAw0WOrAOLlt06Fu
+					TFAAOBNo6384KB3aZ1RrKUu4Cqs= )
+			3600	NSEC	new-fast-box.example.com. DNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					wMenqM3A9lWwZSHJz+7t0hBfTsB1JGK9qV9F
+					kGtJRNl0SuZA28bFRL0J5vSKj9tuB8EjCRdW
+					2l885yaKKGSTF3aFzDnF2YW9mV6BadNGwdkC
+					+mYguk/tkPNW2TMdrYJC7StXKh8dOQIpT6/K
+					oc+ShVBYtQJocRy89hk9M4Ex9EA= )
+mail.example.com.	3600	IN A	10.0.0.3
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ah9IQBB/moRnqRL9mug+9cEE6Pz1YbJMQkUg
+					yzTeh/09bh3POMn9eZqo5bBx6vlDsFgUbw6e
+					IclZY4rV4mUeIWz2kEW/ZHc2tADDYVHRTQAy
+					4sy3g+tF3d8OxMQZ0v6J2MTN9DlpVCaxbjPp
+					sd0xjJ2uBmn81DKbaZ8UKA5ND1E= )
+			3600	NSEC	*.n.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					oJMJsjzzNWihix6CeVihqCI/ByqU0qm+hDWX
+					mvgss0U8VXQ1o6oUJ2kXB9agzhRtzo+Z/5jU
+					6zFYajcnzuwD62jmLbz5NAzcyZX+ejyHtt+d
+					/wlkYGrumY1B4qB0YGRji66Wo68BK11VZ+a4
+					hjsW6qRyHsQeKus3BfdQ2DRHU2s= )
+ns.example.com.		3600	IN A	10.0.0.2
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					Lx5lSuiEjsbXrLW6PVIkoojgWfRTxIxdbVDv
+					8lC5bUziKm41NQ0AVduIY/c08fBshJ83ylM1
+					GqsZKwfqSszMIlHu3u5pONkMsYs7lxxYBdES
+					NZqEsTsaEmgnMlv6BM5cvstiJKVX7+z43y9j
+					XohTZ3G9UOv3B0uObMzabqweSfw= )
+			3600	NSEC	ns2.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					rqlsD5SHTL9sXqlqBU/ZcAxn9pkKFZoRjAiB
+					kgdU8vExku+wGRbBB+c0toFbmPjJv1E4z9ae
+					fN3dfxCmIg049UspJUP0AqWOrtbQqqN2d3dl
+					ycJRw5Cpf7qOpp41EGJ/ujPzeIq6t0nW/m2P
+					JGkE9arlL8J802tFJKWn2aUc78Y= )
+o.example.com.		3600	IN CNAME a.e.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					fjrWtwXBv82jZ6BWeYlfxLqxOvaZNONWqiIF
+					6p3NM4Nwv7O1BvI+Jr9MzxAkk3CkTynGIFQc
+					2wFDrAlT6XnBjJmvNiGf45utlhkifEYOR2Vw
+					qR1O3o3x4XMc+gVrmhdMaYAabZnD6YYPEybM
+					6dLzSDMg5K6GjLJglmimT0wfTcI= )
+			3600	NSEC	old-slow-box.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					RwVHMNAd0Qdcu85znEzuhPF47UmoEZ0uBo0M
+					jd8ySEH07eV0lg9JOpzvdo3gUD6zyYs3xC1S
+					CO/RcTGIhEAfvkhV1N4/S5eQzUn3Cc5iaXUG
+					WQNpYuE2JKaLr3m3iGmxO2JqkE8YqTyK2WEf
+					rAL2SunFcKua1KHX959yNFGtou0= )
+new-fast-box.example.com. 3600	IN A	172.30.79.13
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					aeEl9FNzWG3QAPjDjCTZNMpO108nKfRqB8oW
+					Sw/e6Hynq4XKQuBBKNCvRBujuyrPMSuJdV1Z
+					xc1MGKMbSD1ZGyROhW+F1pTyRho1f3V4gmyI
+					318iZuKxy+IbOVimYxXggM2xgkBgROOVI7r8
+					slU5+SqZ3c/DfJn3cVHuevAI+wo= )
+			3600	NSEC	ns.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					KF7gy4yC2SLwJvhCr/wBiNDWO68ypNu6EyBo
+					SyFnP3BsoZxsZvz3PYnG+slYAfMYqxfZAnEX
+					p8qMUQeWuZEzZLqmDw4/yrRupzjLDFE581vp
+					LVjUxYANKjOvYPbn+bPsuLKG2BuCcpyjLeEb
+					4GrR1PBI6tRPfIyeUo1AUjXzlW8= )
+ns2.example.com.	3600	IN A	10.0.0.6
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					EjnIln97zP0GlFiF8J9HUuGBohcqvaAnCZUf
+					u9RuM4YhAijthrv+1vYJj9IKLE7JGXesVXcW
+					6iLsddK05EA9UWcKhyOWrSIz2NmBBo0lj8uK
+					7K/0zAvJ4uiSU+/CiGJBmzXxAQzC/gH4mU8k
+					vdpB7AufVUaKGDkB8203wk7LeiU= )
+			3600	NSEC	o.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					cOxEjb/Aje8DI82rY7qNowoJ2VIiPOZIhlfr
+					MJMNDEiXBfbw+x53ewEj+YpnwwAAFWPrATtj
+					C/pEyxGCqwxEYkUCCTaM6YjhAKR0yPVJVkjY
+					GM1frct0/uOUuowalGf1SppZsxBKqv5cGq8o
+					x8GlBRNWt02ElyO2Wyy9k2TjKR4= )
+old-slow-box.example.com. 3600	IN A	172.30.79.11
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ON91+7dJR8dAN2SUBZclVbrhRX8BOU5HLRYx
+					J8Iy4kiaPMNdLEHqXF2tK5FqSLKkZV9S6k1p
+					5Hl1TUGYxVFq1+OxXpYzgk+Wy6QCW/sxWNky
+					ZpZ2X0ZzicI733kJ2YTZS8F7GaU053tCwOmY
+					wmLMKa6qd+FNh/xGLpUFrG6xRmo= )
+			3600	NSEC	p.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					LFwXMS6XtokUOkda4DcVgSTNpuO2dhzUMbiu
+					LhfiYQ+nXn3Qwx0gORJZNdcMmUn3/j8dV/MN
+					Mfdil66OwG12ZNfi6LvLlj8DdMsBie/vHDLR
+					oUJUXdeQe5sM1rU+QoHfPCBXMWv5Bp6ZV8Wo
+					Bw1ASybab+P0JXWzlnKkfzgBUsg= )
+ns.sub.example.com.	3600	IN A	10.1.0.1
+sub.example.com.	3600	IN NS	ns.sub.example.com.
+			3600	NSEC	sub2.example.com. NS RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					HjalhqyrN25GoPU0znzhzh58b7nM8N4mLKsE
+					bB+edEZOkM15enAhMeKzYWtUau9DTWwUC3Ip
+					DeLUT5XKEm91Ln0UnK7GKWfSPfVyTrpNOpKi
+					EnCUpk9yVC3OKkYt5jCTlP5HjuLRh7IJLpfd
+					RPtrJqJJSNmHt2vFoSdMw54Z1Xk= )
+*.sub2.example.com.	3600	IN A	10.2.0.1
+sub2.example.com.	3600	IN NS	ns.sub2.example.com.
+			3600	NSEC	sub3.example.com. NS RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					NdI/fYvlY5BQsIU98z37XRUtoYL+3d6NJBMn
+					erxI0rDgqceMFVI52Hl2POzqanYoqK9QEyWS
+					9rnt6pKzCG3vZv7XcdyqFkP/sIoMNcevZw5/
+					JJ172wyrfYRepkbQ20CL9KUGOyQaPJQs61wR
+					1L/78YmA8QD+zduli61hwDRjN4Y= )
+p.example.com.		3600	IN CNAME a.sub.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					DQQ5JhXp1OUOTm6+Rtsb3idf0iO9PvuASLwU
+					9tzKExU9piaTE7FQN95fq48Kv40iH3W7513p
+					JKbojGbZui2OR4l4V0gqDzP4MU0fhMi+kmt8
+					oKhEY7FlOx09Ei9jS0wWYBnPAxIm5N1NSTbP
+					g5tQ7MWYtBNtyyrN9mSdicAaCvw= )
+			3600	NSEC	server.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					LcvgnVSYj2bojkEPkHopvuwg097SLoVYVzDe
+					N9M4GbHYkPILrdevgmmNIhDw7FS5XJI4zVo9
+					xvE+bUMK056uT+DmPSCJh36q9gt2bteSxbqb
+					yus9zWldGoUoQzwuvtWcjHwPtSnquL/16xUJ
+					3FPwtqNGKw4Vx6zw5PXdY+jRTcs= )
+sub3.example.com.	3600	IN NS	ns.sub2.example.com.
+			3600	NSEC	sub4.example.com. NS RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					QKnEmC9rfdkdEkLLKxcnm0EkAyW1QI56AuTG
+					+Mf2CoD+JHgf9dFKm9EOinM+pHcrlT6/XmUW
+					H2IKnWcoqs2B9Vrh9CeC9qXCnFxaNxgMG9hu
+					zg4H6LCW0pSKOoq8/KPCrtGGJTn6k8ck+qhP
+					hoz2O63tHuIpAtO6jcFL0B5jk7k= )
+sub4.example.com.	3600	IN NS	ns.example.com.
+			3600	NSEC	sub5.example.com. NS RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					pFTM518iEalVbWIisYeXX0mfel5D3EeKL2tV
+					e547nz5STOOKeqhaFpwiEkBnvBvbUJLDpNJH
+					bTpR98BDLnLPhSuhdQy1uBhONl6vaI6o0+P1
+					2cDaDQWat7Qc0bt2FOjWfhwzEJznqUvHFW1E
+					3umsEPEXcHR4fmdPNnpvCnuCYv8= )
+server.example.com.	3600	IN A	172.30.79.10
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ptyuguf9rHSyP8q4a+ob+kNl4ns3ZNzOT2NZ
+					+9lZsqpbbe6D15/6AVZyEz7NjLsLbSTbmUxI
+					MKacxVRUbJS1vQ7pztP/Lms4W+LsmnXafH0d
+					Pyj1OpArqckA/zeX05RXizUfqmsWq5thTZZ8
+					VMsCFImGqpi+p3wr6FFc6NkuvEE= )
+			3600	NSEC	sub.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					Tv46nHdkqO+SBiFf3RtDnIbyom2qGJ8w+ftJ
+					EYNfIdIghrR45az4sE5Ax2OzbIDzDycJhu8i
+					dSaLEgWASatClQZvzysdqoVmM2ajD+MgKTpv
+					Djr5BRpLSQc/qfEINM5lus1Gy1UNruhYc7XV
+					ah4fr1LXSrPGoo3bPk5r9Sy2VKI= )
+sub5.example.com.	3600	IN CNAME sub3.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					AP1MAgDTW5UYOQGZe1kW9qJGNComeMgBtQtK
+					PzsIU9y2TyrcSbU4wB8JRFJ1hMZk5wlkUe5M
+					yhvKe55wvknSlWOR1AU0vks0kSzhoPxHPxEM
+					NpMBV/Dv7NCGivh7LMxr0ra7EENNr4Ojv1Bl
+					bUAj8VMuLir8xqv5z3LzWTEVQ/g= )
+			3600	NSEC	sysadmins-box.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					u+ulC7UqLA754CiYgKQHXquGhHHHoF3SifcC
+					lVHj9OTLXomfJMDJX5UG5K3yODlokaYVWOZS
+					MDus3B0LdAVv0+rEEPNxVBZ+t6P5/4JufESK
+					JFvxL3pSIU1bIlUZ4VDzgg5h6rBnA/oFavCc
+					a8xgf6FDwRNWVxdWcSfH/dStCSk= )
+wwwtest.example.com.	3600	IN CNAME www.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					GNh/COVeSULHxFcEBE66wv56YHNAWsPuSF7C
+					Cl2rc0JXlOCDhUqKy7ZKFTbXMZi++upiHpwI
+					BBbYLb7mhpLr/zEaOJH8QdiHsE7+hkY7oe2e
+					Gz1rvDyjx4XSugVXHr97RhZI7UA4opECDrIv
+					5p3nqGLutSWju/grR6+keppEfFk= )
+			3600	NSEC	example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					sRklHhLmH7i22GH8W3j5N6qMrG0rEmUb2+d9
+					QJVcnQCgwyeiO38DMN2Vvy8jqVgXN+C5uRHV
+					XcvUhJjyJ7x7zaxVKvncwlRBQkGj5hNmVCoJ
+					4gpVzD3aerZ8fwwMUf+ETqBtbkBajsfayEXq
+					kpITfSd4Pi5IyVbIr420IconoPc= )
+sysadmins-box.example.com. 3600	IN A	172.30.79.12
+			3600	RRSIG	A 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ztrXayS9OAxxKPP2U6DxtU3VNQ+aauZXNB+l
+					lxhXm2j/dFo6j6eR1hnRfGx6UeauQAdeKQA3
+					OKeNaar6KbH9rw/iwnZbErWQurdUNVYvxEHD
+					fRRBa1b6d/zkwPcbdT+pSIZVoRzt9LrWQuEd
+					2Gk5cBl6RP2oKxulDeP5XWXpQN8= )
+			3600	NSEC	www.example.com. A RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					D03U27J/Yoan06O1qYHavUBHZZapO/f0GR5j
+					OfNHxpEvsiQmekeJNtYD/pm3aQhXjn8GDh57
+					yrN6TBmo4tleL9M0w5BTT4Bm7yHdg69T+DgW
+					cVvgqv2Vgq/zbIYJuBd21doDh2LrkHcMbTas
+					FSYHA6OV8p6DzkbkXL9oykq/LCo= )
+www.example.com.	3600	IN CNAME ns.example.com.
+			3600	RRSIG	CNAME 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ElzpT92LMJmKZq37lHmE6tOFDjh3RBdW3wRF
+					M63YsLhlP0OFNsbFefBA9H6qQdlV/OlP9QYD
+					FRn6hWPkuoelvDjyNdVFPc6CZrns4+eU34Yg
+					aGPZoKVszovHu22Lr4soJnDFwRAJ/DXcHMCJ
+					EHMSQpTYIg7AuDaBg9j+LqCVKZs= )
+			3600	NSEC	wwwtest.example.com. CNAME RRSIG NSEC
+			3600	RRSIG	NSEC 8 3 3600 20110319091957 (
+					20110217091957 20058 example.com.
+					ycFBDZT3AHzyCklFxMheOfRyehNZNZsXHJei
+					h6Fi9AChB05oLVsM1MZqVQj0LPfZC7bJENtJ
+					XNwNz/wOJIjX4OUSGQQvEBLa+bzMvBg9i3L1
+					YduNOH1xHGYbYKvxUd5b84XsIu1VQdffWDoK
+					hkFCBPGlL+A8/5qPva1FFdk3s6Q= )
diff --git a/samples/knot.full.conf b/samples/knot.full.conf
new file mode 100644
index 0000000..04fbe09
--- /dev/null
+++ b/samples/knot.full.conf
@@ -0,0 +1,250 @@
+#
+# knot.sample.conf
+#
+# This is a sample configuration file for Knot DNS server.
+#
+
+# This is a comment.
+
+#
+# There are 4 main sections of this config file:
+#   system, zones, interfaces and log
+#
+
+# Section 'system' contains general options for the server
+system {
+
+  # Identity of the server (see RFC 4892). Not used yet.
+  identity "I have no mouth and must scream";
+
+  # Version of the server (see RFC 4892). Not used yet.
+  version "0.1";
+
+  # Working directory of the server
+  # Used to store compiled zones and PID file
+  storage "/tmp/knot-sample";
+
+  # Number of workers per interface
+  # This option is used to force number of threads used per interface
+  # Default: unset (auto-estimates optimal value from the number of online CPUs)
+  workers 1;
+}
+
+# Section 'keys' contains list of TSIG keys
+keys {
+
+  # TSIG key
+  #
+  # format: name key-type "<key>";
+  # where key-type may be one of the following:
+  #   hmac-md5
+  #   hmac-sha1
+  #   hmac-sha224
+  #   hmac-sha256
+  #   hmac-sha384
+  #   hmac-sha512
+  # and <key> is the private key
+  key0.server0 hmac-md5 "Wg==";
+
+  # TSIG key for zone
+  key0.example.com hmac-md5 "==gW";
+}
+
+# Section 'interfaces' contains definitions of listening interfaces.
+interfaces {
+
+  # Interface entry
+  # 
+  # Format 1: <name> { address <address>; [port <port>;] }
+  ipv4 {                # <name> is an arbitrary symbolic name
+    address 127.0.0.1;  # <address> may be ither IPv4 or IPv6 address
+    port 53531;         # port is required for XFR/IN and NOTIFY/OUT 
+  }
+
+  # Format 2: <name> { address <address>@<port>; }
+  # shortipv4 {
+  #   address 127.0.0.1@53532;
+  #}
+
+  # Format 1 (IPv6 interface)
+  # ipv6 {
+  #   address ::1@53533;
+  # }
+
+  # Format 2 (IPv6 interface)
+  # ipv6b {
+  #   address [::1]@53534;
+  # }
+
+}
+
+# Section 'remotes' contains symbolic names for remote servers.
+# Syntax for 'remotes' is the same as for 'interfaces'.
+remotes {
+
+  # Remote entry
+  #
+  # Format 1: <name> { address <address>; [port <port>;] }
+  server0 {             # <name> is an arbitrary symbolic name
+    address 127.0.0.1;  # <address> may be ither IPv4 or IPv6 address
+    port 53531;         # port is optional (default: 53)
+    key key0.server0;    # (optional) specification of TSIG key associated for this remote
+  }
+
+  # Format 2: <name> { address <address>@<port>; }
+  server1 {
+    address 127.0.0.1@53001;
+  }
+}
+
+# Section 'zones' contains information about zones to be served.
+zones {
+
+  # Shared options for all listed zones
+  #
+
+  # Enable semantic checks for all zones (if 'on')
+  # Possible values: on|off
+  # Default value: off
+  semantic-checks off;
+
+  # NOTIFY response timeout
+  # Possible values: <1,...> (seconds)
+  # Default value: 60
+  notify-timeout 60;
+
+  # Number of retries for NOTIFY
+  # Possible values: <1,...>
+  # Default value: 5
+  notify-retries 5;
+
+  # Timeout for syncing changes from zone database to zonefile
+  # Possible values: <1..INT_MAX> (seconds)
+  # Default value: 1h (1 hour)
+  # It is also possible to suffix with unit size [s/m/h/d]
+  # f.e. 1s = 1 day, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
+  zonefile-sync 1h;
+
+  # File size limit for IXFR journal
+  # Possible values: <1..INT_MAX>
+  # Default value: N/A (infinite)
+  # It is also possible to suffix with unit size [k/M/G]
+  # f.e. 1k, 100M, 2G
+  ixfr-fslimit 1G;
+
+  # Zone entry
+  #
+  # Format: <zone-name> { file "<path-to-zone-file>"; }
+  example.com {  # <zone-name> is the DNS name of the zone (zone root)
+    # <path-to-zone-file> may be either absolute or relative, in which case
+    #   it is considered relative to the current directory from which the server
+    #   was started.
+    file "samples/example.com.zone";
+
+    # Enable zone semantic checks
+    # Possible values: on|off
+    # Default value: off
+    semantic-checks on;
+
+    # NOTIFY response timeout (specific for current zone)
+    # Possible values: <1,...> (seconds)
+    # Default value: 60
+    notify-timeout 60;
+
+    # Number of retries for NOTIFY (specific for current zone)
+    # Possible values: <1,...>
+    # Default value: 5
+    notify-retries 5;
+
+    # Timeout for syncing changes from zone database to zonefile
+    # Possible values: <1..INT_MAX> (seconds)
+    # Default value: inherited from zones.zonefile-sync
+    # It is also possible to suffix with unit size [s/m/h/d]
+    # f.e. 1s = 1 day, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
+    zonefile-sync 1h;
+
+    # XFR master server 
+    xfr-in server0;
+
+    # ACL list of XFR slaves
+    xfr-out server0, server1;
+
+    # ACL list of servers allowed to send NOTIFY queries 
+    notify-in server0;
+
+    # List of servers to send NOTIFY to 
+    notify-out server0, server1;
+  }
+}
+
+# Section 'log' configures logging of server messages.
+#
+# Logging recognizes 3 symbolic names of log devices: 
+#   stdout    - Standard output
+#   stderr    - Standard error output
+#   syslog    - Syslog
+# 
+# In addition, arbitrary number of log files may be specified (see below).
+#
+# Log messages are characterized by severity and category.
+# Supported severities: 
+#   debug     - Debug messages. Must be turned on at compile time.
+#   info      - Informational messages.
+#   notice    - Notices and hints.
+#   warning   - Warnings. An action from the operator may be required.
+#   error     - Recoverable error. Some action should be taken.
+#   fatal     - Non-recoverable errors resulting in server shutdown.
+#               (Not supported yet.)
+#   all       - All severities.
+#
+# Categories designate the source of the log message and roughly correspond
+#   to server modules
+# Supported categories:
+#   server    - Messages related to general operation of the server.
+#   zone      - Messages related to zones, zone parsing and loading.
+#   answering - Messages regarding query processing and response creation.
+#   any       - All categories
+#
+# More severities (separated by commas) may be listed for each category.
+# All applicable severities must be listed. 
+#   (I.e. specifying 'error' severity does mean: 'log error messages', 
+#    and NOT 'log all messages of severity error and above'.)
+#
+# Default settings (in case there are no entries in 'log' section or the section
+# is missing at all):
+#
+# stderr { any error; }
+# syslog { any error; }
+log {
+
+  # Log entry
+  #
+  # Format 1: 
+  # <log> { 
+  #   <category1> <severity1> [, <severity2> ...]; 
+  #   <category2> <severity1> [, <severity2> ...];
+  #   ...
+  # } 
+  syslog {     # <log> is a symbolic name of a log device (see above)
+    # log errors of any category 
+    any error;    # for <category> and <severity> see above
+    # log also warnings and notices from category 'zone'
+    zone warning, notice;
+    # log info from server
+    server info;
+  }
+
+  # Log fatal, warnings and errors to stderr
+  stderr {
+    any error, warning;
+  }
+
+  # Format 2:
+  # file <path> {
+  #   <category1> <severity1> [, <severity2> ...];
+  #   <category2> <severity1> [, <severity2> ...];
+  # }
+  file "/tmp/knot-sample/knotd.debug" {  # <path> is absolute or relative path to log file
+    server debug;
+  }
+}
diff --git a/samples/knot.min.conf b/samples/knot.min.conf
new file mode 100644
index 0000000..f9bc29c
--- /dev/null
+++ b/samples/knot.min.conf
@@ -0,0 +1,30 @@
+#
+# knot.min.conf
+#
+# This is a sample of a minimal configuration file for Knot DNS.
+#
+# For exhaustive list of all options see samples/knot.full.conf
+# in the source directory.
+#
+
+system {
+  identity "Knot DNS minimal configuration";
+  storage "/tmp/knot-minimal";
+}
+
+interfaces {
+  ipv4 { address 127.0.0.1@53533; }
+}
+
+zones {
+  example.com {  
+    file "samples/example.com.zone"; 
+  }
+}
+
+log {
+  stdout { any info, notice; }
+  stderr { any debug, warning, error; }
+  syslog {}
+  file "/tmp/knot-minimal/knotd.log" { any all; }
+}
diff --git a/samples/knot.sample.conf.in b/samples/knot.sample.conf.in
new file mode 100644
index 0000000..7084595
--- /dev/null
+++ b/samples/knot.sample.conf.in
@@ -0,0 +1,18 @@
+system {
+  identity "@package@ @version@";
+  storage "@localstatedir@/@package@";
+}
+
+interfaces {
+  my-iface { address 127.0.0.1@5353; }
+}
+
+zones {
+  example.com {
+    file "@sysconfdir@/example.com.zone";
+  }
+}
+
+log {
+  syslog { any warning, error; }
+}
diff --git a/scripts/parse_dump.py b/scripts/parse_dump.py
new file mode 100755
index 0000000..d9cc44b
--- /dev/null
+++ b/scripts/parse_dump.py
@@ -0,0 +1,145 @@
+#!/usr/bin/python
+from scapy.all import *
+from binascii import *
+import base64
+import sys
+import dns.rdata
+import dns.rrset
+from struct import *
+
+fr = open(sys.argv[1] + ".raw_data", 'wb')
+fp = open(sys.argv[1] + ".parsed_data", 'wb')
+
+def chop_and_write_rr_query(rr):
+	name = dns.name.from_text(rr.qname)
+#	print rr.qname
+
+	wire = name.to_wire()
+	fp.write(pack('B', len(wire)))
+#	print len(wire)
+	fp.write(wire)
+	fp.write(pack('H', rr.qtype))
+	fp.write(pack('H', rr.qclass))
+
+def chop_and_write_rr_response(rr):
+	name = dns.name.from_text(rr.rrname)
+#	print rr.rrname
+
+	wire = name.to_wire()
+	fp.write(pack('B', len(wire)))
+	fp.write(wire)
+	fp.write(pack('H', rr.type))
+	fp.write(pack('H', rr.rclass))
+	fp.write(pack('L', rr.ttl))
+
+	try:
+		rdata = dns.rdata.from_wire(rr.rclass, rr.type, rr.rdata, 0, len(rr.rdata))
+		fp.write(pack('H', len(rr.rdata)))
+#		print "type ", rr.type, "length ", len(rr.rdata)
+#		OPT has length 0 - it should have no rdata
+		rdata.to_wire(fp)
+	except:
+
+		try:
+#			if rr.rdata[0] != '\#':
+			rdata = dns.rdata.from_text(rr.rclass, rr.type, rr.rdata)
+			try:
+				fp.write(pack('H', len(rdata)))
+			except:
+				# no length - no way to know wire length
+				try:
+#					print "unknown length for type", rr.type
+#						if rr.type == 2:
+#							fp.seek(1, 1)
+#							old = fp.tell()
+#							rdata.to_wire(fp)
+#							size = fp.tell() - old
+#							fp.seek(-(size + 1), 1)
+#							fp.write(pack('B', size))
+#							fp.seek(0, 2)
+#						else:
+					rdata.to_wire(fp)
+				except Exception as e:
+					print 'Error, exiting: ', e
+					sys.exit(-1)
+		except Exception as e:
+			print 'Error,', e
+			print 'could not parse rdata type: ', rr.type
+			print 'dumping directly (hopefully it is SOA)'
+# i need to do some kind of rollback here...
+			fp.write(pack('H', len(rr.rdata)))
+			fp.write(rr.rdata)
+
+	
+	if rr.type == 50:
+		f = open('nsec3debug', 'wb')
+		rdata.to_wire(f)
+		f.close()
+
+def chop_and_write_section_response(section):
+	if section == None:
+		return
+	i = 0
+	rr = section.getlayer(i);
+	while rr != None:
+		chop_and_write_rr_response(rr)
+		i += 1
+		rr = section.getlayer(i)
+
+def chop_and_write_section_query(section):
+	if section == None:
+		return
+	i = 0
+	rr = section.getlayer(i);
+	while rr != None:
+		chop_and_write_rr_query(rr)
+		i += 1
+		rr = section.getlayer(i)
+
+def chop_and_write_packet(packet):
+	fp.write(pack('H', packet.id))
+#	fp.write(pack('H', packet.qr))
+#	fp.write(pack('H', packet.opcode))
+#	fp.write(pack('H', packet.aa)) #TODO these are not uint16_t
+#	fp.write(pack('H', packet.rcode)) 
+	fp.write(pack('H', packet.qdcount))
+	fp.write(pack('H', packet.ancount))
+	fp.write(pack('H', packet.nscount))
+	fp.write(pack('H', packet.arcount))
+	
+#write query flag
+	fp.write(pack('H', packet.qr))
+
+	chop_and_write_section_query(packet.qd)
+	chop_and_write_section_response(packet.an)
+	chop_and_write_section_response(packet.ns)
+	chop_and_write_section_response(packet.ar)
+
+packets = rdpcap(sys.argv[1])
+
+total_length = len(packets)
+
+fr.write(pack('L', total_length))
+fp.write(pack('L', total_length))
+
+for packet in packets:
+	try:
+		data = a2b_hex(str(packet['DNS']).encode('hex'))
+		fr.write(pack('H', packet.qr))
+		fr.write(pack('H', len(data)))
+		fr.write(data)
+		chop_and_write_packet(packet['DNS'])
+	except IndexError:
+		print 'non-DNS packet'
+		total_length -= 1
+
+fr.seek(0)
+fp.seek(0)
+
+fr.write(pack('L', total_length))
+fp.write(pack('L', total_length))
+
+print 'written ', total_length, 'packets'
+
+fr.close()
+fp.close()
diff --git a/scripts/pcap2dnsp.py b/scripts/pcap2dnsp.py
new file mode 100755
index 0000000..305f8bb
--- /dev/null
+++ b/scripts/pcap2dnsp.py
@@ -0,0 +1,17 @@
+#!/usr/bin/python
+from scapy.all import *
+import sys
+
+nstypes = { 0:"ANY", 255:"ALL",1:"A", 2:"NS", 3:"MD", 4:"MD", 5:"CNAME", 6:"SOA", 7: "MB", 8:"MG", 9:"MR",10:"NULL",11:"WKS",12:"PTR",13:"HINFO",14:"MINFO",15:"MX",16:"TXT", 17:"RP",18:"AFSDB",28:"AAAA", 33:"SRV",38:"A6",39:"DNAME"}
+
+a=rdpcap(sys.argv[1]);
+
+f=open(sys.argv[2], 'w');
+
+for i in a:
+  try:
+    f.write(i[3].qname+' '+nstypes[i[3].qtype]+'\n')
+  except:
+    continue
+
+f.close()
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..3f65566
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,336 @@
+ACLOCAL_AMFLAGS = -I ../m4
+libexec_PROGRAMS = knot-zcompile unittests unittests-zcompile unittests-libknot-realdata unittests-libknot
+sbin_PROGRAMS = knotc knotd
+MANPAGES = knotc.8 knotd.8
+man8_MANS = knotc.8 knotd.8
+EXTRA_DIST = $(man8_MANS)
+
+# $(YACC) will generate header file
+AM_CFLAGS = -Wall -Ilibknot -DLIBEXECDIR='"$(libexecdir)"' -DSYSCONFDIR='"$(sysconfdir)"' -DSBINDIR='"$(sbindir)"'
+AM_YFLAGS = -d
+libknotd_la_YFLAGS = -pcf_ -d
+libknotd_la_LFLAGS = # TODO: reentrant parser, prefix
+
+BUILT_SOURCES =					\
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/realdata/parsed_data.rc	\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/realdata/raw_data.rc	\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc			\
+	zparser.h				\
+	zparser.c				\
+	zlexer.c				\
+	libknotd_la-cf-lex.c			\
+	libknotd_la-cf-parse.c			\
+	libknotd_la-cf-parse.h
+
+CLEANFILES =					\
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/realdata/parsed_data.rc	\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/realdata/raw_data.rc	\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc                    \
+	zparser.h				\
+	zparser.c				\
+	zlexer.c				\
+	libknotd_la-cf-lex.c			\
+	libknotd_la-cf-parse.c			\
+	libknotd_la-cf-parse.h
+
+knotc_SOURCES =					\
+	knot/ctl/knotc_main.c
+
+knot_zcompile_SOURCES =				\
+	zcompile/zcompile_main.c		\
+	zcompile/zcompile-error.c		\
+	zcompile/parser-util.h			\
+	zcompile/parser-descriptor.h		\
+	zcompile/zparser.y			\
+	zcompile/zlexer.l			\
+	zcompile/zcompile.c			\
+	zcompile/parser-util.c			\
+	zcompile/parser-descriptor.c
+
+unittests_SOURCES =				\
+	tests/common/acl_tests.c		\
+	tests/common/acl_tests.h		\
+	tests/common/da_tests.c			\
+	tests/common/da_tests.h			\
+	tests/common/events_tests.c		\
+	tests/common/events_tests.h		\
+	tests/common/skiplist_tests.c		\
+	tests/common/skiplist_tests.h		\
+	tests/common/slab_tests.c		\
+	tests/common/slab_tests.h		\
+        tests/common/fdset_tests.c		\
+        tests/common/fdset_tests.h		\
+	tests/knot/conf_tests.c			\
+	tests/knot/conf_tests.h			\
+	tests/knot/dthreads_tests.c		\
+	tests/knot/dthreads_tests.h		\
+	tests/knot/journal_tests.c		\
+	tests/knot/journal_tests.h		\
+	tests/knot/server_tests.c		\
+	tests/knot/server_tests.h		\
+	tests/unittests_main.c
+
+unittests_libknot_realdata_SOURCES =			\
+	tests/libknot/realdata/libknot/dname_tests_realdata.c	\
+	tests/libknot/realdata/libknot/response_tests_realdata.c	\
+	tests/libknot/realdata/libknot/edns_tests_realdata.c	\
+	tests/libknot/realdata/libknot/node_tests_realdata.c	\
+	tests/libknot/realdata/libknot/rdata_tests_realdata.c	\
+	tests/libknot/realdata/libknot/rrset_tests_realdata.c	\
+	tests/libknot/realdata/libknot/zone_tests_realdata.c	\
+	tests/libknot/realdata/libknot/zonedb_tests_realdata.c	\
+	tests/libknot/realdata/libknot/packet_tests_realdata.h	\
+	tests/libknot/realdata/libknot/packet_tests_realdata.c	\
+	tests/libknot/realdata/libknot_tests_loader_realdata.h	\
+	tests/libknot/realdata/libknot_tests_loader_realdata.c	\
+	tests/libknot/realdata/unittests_libknot_realdata.c
+
+unittests_libknot_SOURCES =			\
+	tests/libknot/libknot/cuckoo_tests.c	\
+	tests/libknot/libknot/cuckoo_tests.h	\
+	tests/libknot/libknot/response_tests.h	\
+	tests/libknot/libknot/response_tests.c	\
+	tests/libknot/libknot/dname_tests.c	\
+	tests/libknot/libknot/dname_tests.h	\
+	tests/libknot/libknot/dname_table_tests.h	\
+	tests/libknot/libknot/dname_table_tests.c	\
+	tests/libknot/libknot/nsec3_tests.h	\
+	tests/libknot/libknot/nsec3_tests.c	\
+	tests/libknot/libknot/packet_tests.h	\
+	tests/libknot/libknot/packet_tests.c	\
+	tests/libknot/libknot/query_tests.h	\
+	tests/libknot/libknot/query_tests.c	\
+	tests/libknot/libknot/edns_tests.c	\
+	tests/libknot/libknot/edns_tests.h	\
+	tests/libknot/libknot/node_tests.c	\
+	tests/libknot/libknot/node_tests.h	\
+	tests/libknot/libknot/rdata_tests.c	\
+	tests/libknot/libknot/rdata_tests.h	\
+	tests/libknot/libknot/rrset_tests.c	\
+	tests/libknot/libknot/rrset_tests.h	\
+	tests/libknot/libknot/zone_tests.c	\
+	tests/libknot/libknot/zone_tests.h	\
+	tests/libknot/libknot/zone_tree_tests.h\
+	tests/libknot/libknot/zone_tree_tests.c	\
+	tests/libknot/libknot/zonedb_tests.c	\
+	tests/libknot/libknot/zonedb_tests.h	\
+	tests/libknot/unittests_libknot.c
+
+unittests_zcompile_SOURCES =			\
+	zcompile/parser-util.h			\
+	zcompile/parser-descriptor.h		\
+	zcompile/zcompile-error.c		\
+	zcompile/zparser.y			\
+	zcompile/zlexer.l			\
+	zcompile/zcompile.c			\
+	zcompile/parser-util.c			\
+	zcompile/parser-descriptor.c		\
+	zcompile/tests/unittests_zp_main.c
+
+nodist_unittests_SOURCES =			\
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc
+
+knotd_SOURCES =					\
+	knot/main.c
+
+noinst_LTLIBRARIES = libknot.la libknotd.la libknots.la
+
+libknot_la_SOURCES =				\
+	libknot/util/libknot_error.c		\
+	libknot/util/utils.c			\
+	libknot/util/debug.c			\
+	libknot/util/debug.h			\
+	libknot/util/utils.h			\
+	libknot/util/descriptor.c		\
+	libknot/util/tolower.h			\
+	libknot/util/tolower.c			\
+	libknot/util/descriptor.h		\
+	libknot/util/wire.h			\
+	libknot/packet/query.c			\
+	libknot/packet/response.c		\
+	libknot/packet/packet.c			\
+	libknot/packet/packet.h			\
+	libknot/packet/query.h			\
+	libknot/packet/response.h		\
+	libknot/zone/zone.c			\
+	libknot/zone/zone-contents.c		\
+	libknot/zone/zone-tree.c		\
+	libknot/zone/zone-tree.h		\
+	libknot/zone/node.h			\
+	libknot/zone/zone.h			\
+	libknot/zone/zone-contents.h		\
+	libknot/zone/zonedb.c			\
+	libknot/zone/zonedb.h			\
+	libknot/zone/node.c			\
+	libknot/zone/dname-table.h		\
+	libknot/zone/dname-table.c		\
+	libknot/hash/hash-functions.c		\
+	libknot/hash/cuckoo-hash-table.c	\
+	libknot/hash/universal-system.c		\
+	libknot/hash/universal-system.h		\
+	libknot/hash/cuckoo-hash-table.h	\
+	libknot/hash/hash-functions.h		\
+	libknot/nameserver/name-server.h	\
+	libknot/nameserver/name-server.c	\
+	libknot/updates/changesets.h		\
+	libknot/updates/changesets.c		\
+	libknot/updates/xfr-in.h		\
+	libknot/updates/xfr-in.c		\
+	libknot/updates/ddns.h			\
+	libknot/updates/ddns.c			\
+	libknot/edns.c				\
+	libknot/rrset.c				\
+	libknot/dname.c				\
+	libknot/rdata.c				\
+	libknot/nsec3.c				\
+	libknot/consts.h			\
+	libknot/edns.h				\
+	libknot/rdata.h				\
+	libknot/libknot.h			\
+	libknot/dname.h				\
+	libknot/rrset.h				\
+	libknot/nsec3.h				\
+	libknot/tsig.h				\
+	libknot/tsig.c				\
+	libknot/tsig-op.h			\
+	libknot/tsig-op.c
+
+libknots_la_SOURCES =				\
+	common/slab/slab.c			\
+	common/slab/malloc.c			\
+	common/slab/slab.h			\
+	common/slab/malloc.h			\
+	common/libtap/tap.c			\
+	common/libtap/tap.h			\
+	common/libtap/tap_unit.h		\
+	common/lists.c				\
+	common/base32.c				\
+	common/lists.h				\
+	common/base32.h				\
+	common/print.c				\
+	common/print.h				\
+	common/dynamic-array.c			\
+	common/skip-list.c			\
+	common/base32hex.c			\
+	common/skip-list.h			\
+	common/general-tree.h			\
+	common/general-tree.c			\
+	common/dynamic-array.h			\
+	common/tree.h				\
+	common/base32hex.h			\
+	common/evqueue.h			\
+	common/evqueue.c			\
+	common/evsched.h			\
+	common/evsched.c			\
+	common/acl.h				\
+	common/acl.c				\
+	common/sockaddr.h			\
+	common/sockaddr.c			\
+	common/crc.h				\
+	common/crc.c				\
+	common/ref.h				\
+	common/ref.c				\
+	common/errors.h				\
+	common/errors.c				\
+        common/WELL1024a.h			\
+        common/WELL1024a.c			\
+        common/fdset.h				\
+        common/fdset.c				\
+        common/fdset_poll.h			\
+        common/fdset_poll.c			\
+        common/fdset_kqueue.h			\
+        common/fdset_kqueue.c			\
+        common/fdset_epoll.h			\
+        common/fdset_epoll.c			
+
+libknotd_la_SOURCES =				\
+	knot/stat/gatherer.c				\
+	knot/stat/stat.c				\
+	knot/stat/gatherer.h				\
+	knot/stat/stat.h				\
+	knot/common.h				\
+	knot/other/log.c			\
+	knot/other/log.h			\
+	knot/other/debug.h			\
+	knot/other/error.h			\
+	knot/other/error.c			\
+	knot/conf/cf-parse.y			\
+	knot/conf/cf-lex.l			\
+	knot/conf/conf.c			\
+	knot/conf/logconf.c			\
+	knot/conf/logconf.h			\
+	knot/conf/conf.h			\
+	knot/ctl/process.c			\
+	knot/ctl/process.h			\
+	knot/server/dthreads.c			\
+	knot/server/journal.c			\
+	knot/server/socket.c				\
+	knot/server/server.c				\
+	knot/server/udp-handler.c			\
+	knot/server/tcp-handler.c			\
+	knot/server/xfr-handler.c			\
+	knot/server/zones.c				\
+	knot/server/socket.h				\
+	knot/server/udp-handler.h			\
+	knot/server/tcp-handler.h			\
+	knot/server/xfr-handler.h			\
+	knot/server/dthreads.h			\
+	knot/server/journal.h			\
+	knot/server/zones.h				\
+	knot/server/notify.h				\
+	knot/server/notify.c				\
+	knot/server/zones.h				\
+	knot/zone/zone-load.c			\
+	knot/zone/zone-load.h			\
+	knot/zone/zone-dump.c			\
+	knot/zone/zone-dump-text.c			\
+	knot/zone/zone-dump-text.h			\
+	knot/zone/zone-dump.h			\
+	knot/server/server.h
+
+libknotd_la_LIBADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+libknots_la_LIBADD = @LIBOBJS@
+knotd_LDADD = libknotd.la ../libknot/libknot.la libknots.la @LIBOBJS@
+knotc_LDADD = libknotd.la ../libknot/libknot.la libknots.la @LIBOBJS@
+knot_zcompile_LDADD = libknots.la ../libknot/libknot.la libknotd.la @LIBOBJS@
+unittests_LDADD = libknotd.la libknots.la @LIBOBJS@
+unittests_zcompile_LDADD = ../libknot/libknot.la libknots.la libknotd.la @LIBOBJS@
+unittests_libknot_LDADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+unittests_libknot_realdata_LDADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+
+# automake complains on % rules:
+#   `%'-style pattern rules are a GNU make extension
+
+tests/libknot/parsed_data.rc: tests/libknot/files/parsed_data
+	../resource.sh tests/libknot/files/parsed_data >$@
+
+tests/libknot/realdata/parsed_data.rc: tests/libknot/realdata/files/parsed_data
+	../resource.sh tests/libknot/realdata/files/parsed_data >$@
+
+tests/libknot/parsed_data_queries.rc: tests/libknot/files/parsed_data_queries
+	../resource.sh tests/libknot/files/parsed_data_queries >$@
+
+tests/libknot/raw_data_queries.rc: tests/libknot/files/raw_data_queries
+	../resource.sh tests/libknot/files/raw_data_queries >$@
+
+tests/libknot/raw_data.rc: tests/libknot/files/raw_data
+	../resource.sh tests/libknot/files/raw_data >$@
+
+tests/libknot/realdata/raw_data.rc: tests/libknot/realdata/files/raw_data
+	../resource.sh tests/libknot/realdata/files/raw_data >$@
+
+tests/sample_conf.rc: tests/files/sample_conf
+	../resource.sh tests/files/sample_conf >$@
+
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..7811da5
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,2396 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
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+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+libexec_PROGRAMS = knot-zcompile$(EXEEXT) unittests$(EXEEXT) \
+	unittests-zcompile$(EXEEXT) \
+	unittests-libknot-realdata$(EXEEXT) unittests-libknot$(EXEEXT)
+sbin_PROGRAMS = knotc$(EXEEXT) knotd$(EXEEXT)
+subdir = src
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
+	$(srcdir)/config.h.in libknotd_la-cf-lex.c \
+	libknotd_la-cf-parse.c libknotd_la-cf-parse.h zlexer.c \
+	zparser.c zparser.h
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+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_compiler_flags.m4 \
+	$(top_srcdir)/m4/ax_ext.m4 \
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+	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
+	$(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LTLIBRARIES = $(noinst_LTLIBRARIES)
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+am_libknot_la_OBJECTS = libknot_error.lo utils.lo debug.lo \
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+am__installdirs = "$(DESTDIR)$(libexecdir)" "$(DESTDIR)$(sbindir)" \
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+am_knot_zcompile_OBJECTS = zcompile_main.$(OBJEXT) \
+	zcompile-error.$(OBJEXT) zparser.$(OBJEXT) zlexer.$(OBJEXT) \
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+	parser-descriptor.$(OBJEXT)
+knot_zcompile_OBJECTS = $(am_knot_zcompile_OBJECTS)
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+	@LIBOBJS@ $(am__empty)
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+	packet_tests_realdata.$(OBJEXT) \
+	libknot_tests_loader_realdata.$(OBJEXT) \
+	unittests_libknot_realdata.$(OBJEXT)
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+	$(am_unittests_libknot_realdata_OBJECTS)
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+	libknots.la @LIBOBJS@
+am_unittests_zcompile_OBJECTS = zcompile-error.$(OBJEXT) \
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+	unittests_zp_main.$(OBJEXT)
+unittests_zcompile_OBJECTS = $(am_unittests_zcompile_OBJECTS)
+unittests_zcompile_DEPENDENCIES = ../libknot/libknot.la libknots.la \
+	libknotd.la @LIBOBJS@
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+am__depfiles_maybe = depfiles
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+	$(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+CCLD = $(CC)
+LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
+	$(LDFLAGS) -o $@
+@MAINTAINER_MODE_FALSE@am__skiplex = test -f $@ ||
+LEXCOMPILE = $(LEX) $(LFLAGS) $(AM_LFLAGS)
+LTLEXCOMPILE = $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=compile $(LEX) $(LFLAGS) $(AM_LFLAGS)
+YLWRAP = $(top_srcdir)/ylwrap
+@MAINTAINER_MODE_FALSE@am__skipyacc = test -f $@ ||
+YACCCOMPILE = $(YACC) $(YFLAGS) $(AM_YFLAGS)
+LTYACCCOMPILE = $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+	--mode=compile $(YACC) $(YFLAGS) $(AM_YFLAGS)
+SOURCES = $(libknot_la_SOURCES) $(libknotd_la_SOURCES) \
+	$(libknots_la_SOURCES) $(knot_zcompile_SOURCES) \
+	$(knotc_SOURCES) $(knotd_SOURCES) $(unittests_SOURCES) \
+	$(nodist_unittests_SOURCES) $(unittests_libknot_SOURCES) \
+	$(unittests_libknot_realdata_SOURCES) \
+	$(unittests_zcompile_SOURCES)
+DIST_SOURCES = $(libknot_la_SOURCES) $(libknotd_la_SOURCES) \
+	$(libknots_la_SOURCES) $(knot_zcompile_SOURCES) \
+	$(knotc_SOURCES) $(knotd_SOURCES) $(unittests_SOURCES) \
+	$(unittests_libknot_SOURCES) \
+	$(unittests_libknot_realdata_SOURCES) \
+	$(unittests_zcompile_SOURCES)
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
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+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+man8dir = $(mandir)/man8
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+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
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+AUTOCONF = @AUTOCONF@
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+LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
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+MAINT = @MAINT@
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+MKDIR_P = @MKDIR_P@
+NM = @NM@
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+OBJEXT = @OBJEXT@
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+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIMD_FLAGS = @SIMD_FLAGS@
+STRIP = @STRIP@
+VERSION = @VERSION@
+YACC = @YACC@
+YFLAGS = @YFLAGS@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+lt_ECHO = @lt_ECHO@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+ACLOCAL_AMFLAGS = -I ../m4
+MANPAGES = knotc.8 knotd.8
+man8_MANS = knotc.8 knotd.8
+EXTRA_DIST = $(man8_MANS)
+
+# $(YACC) will generate header file
+AM_CFLAGS = -Wall -Ilibknot -DLIBEXECDIR='"$(libexecdir)"' -DSYSCONFDIR='"$(sysconfdir)"' -DSBINDIR='"$(sbindir)"'
+AM_YFLAGS = -d
+libknotd_la_YFLAGS = -pcf_ -d
+libknotd_la_LFLAGS = # TODO: reentrant parser, prefix
+BUILT_SOURCES = \
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/realdata/parsed_data.rc	\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/realdata/raw_data.rc	\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc			\
+	zparser.h				\
+	zparser.c				\
+	zlexer.c				\
+	libknotd_la-cf-lex.c			\
+	libknotd_la-cf-parse.c			\
+	libknotd_la-cf-parse.h
+
+CLEANFILES = \
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/realdata/parsed_data.rc	\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/realdata/raw_data.rc	\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc                    \
+	zparser.h				\
+	zparser.c				\
+	zlexer.c				\
+	libknotd_la-cf-lex.c			\
+	libknotd_la-cf-parse.c			\
+	libknotd_la-cf-parse.h
+
+knotc_SOURCES = \
+	knot/ctl/knotc_main.c
+
+knot_zcompile_SOURCES = \
+	zcompile/zcompile_main.c		\
+	zcompile/zcompile-error.c		\
+	zcompile/parser-util.h			\
+	zcompile/parser-descriptor.h		\
+	zcompile/zparser.y			\
+	zcompile/zlexer.l			\
+	zcompile/zcompile.c			\
+	zcompile/parser-util.c			\
+	zcompile/parser-descriptor.c
+
+unittests_SOURCES = \
+	tests/common/acl_tests.c		\
+	tests/common/acl_tests.h		\
+	tests/common/da_tests.c			\
+	tests/common/da_tests.h			\
+	tests/common/events_tests.c		\
+	tests/common/events_tests.h		\
+	tests/common/skiplist_tests.c		\
+	tests/common/skiplist_tests.h		\
+	tests/common/slab_tests.c		\
+	tests/common/slab_tests.h		\
+        tests/common/fdset_tests.c		\
+        tests/common/fdset_tests.h		\
+	tests/knot/conf_tests.c			\
+	tests/knot/conf_tests.h			\
+	tests/knot/dthreads_tests.c		\
+	tests/knot/dthreads_tests.h		\
+	tests/knot/journal_tests.c		\
+	tests/knot/journal_tests.h		\
+	tests/knot/server_tests.c		\
+	tests/knot/server_tests.h		\
+	tests/unittests_main.c
+
+unittests_libknot_realdata_SOURCES = \
+	tests/libknot/realdata/libknot/dname_tests_realdata.c	\
+	tests/libknot/realdata/libknot/response_tests_realdata.c	\
+	tests/libknot/realdata/libknot/edns_tests_realdata.c	\
+	tests/libknot/realdata/libknot/node_tests_realdata.c	\
+	tests/libknot/realdata/libknot/rdata_tests_realdata.c	\
+	tests/libknot/realdata/libknot/rrset_tests_realdata.c	\
+	tests/libknot/realdata/libknot/zone_tests_realdata.c	\
+	tests/libknot/realdata/libknot/zonedb_tests_realdata.c	\
+	tests/libknot/realdata/libknot/packet_tests_realdata.h	\
+	tests/libknot/realdata/libknot/packet_tests_realdata.c	\
+	tests/libknot/realdata/libknot_tests_loader_realdata.h	\
+	tests/libknot/realdata/libknot_tests_loader_realdata.c	\
+	tests/libknot/realdata/unittests_libknot_realdata.c
+
+unittests_libknot_SOURCES = \
+	tests/libknot/libknot/cuckoo_tests.c	\
+	tests/libknot/libknot/cuckoo_tests.h	\
+	tests/libknot/libknot/response_tests.h	\
+	tests/libknot/libknot/response_tests.c	\
+	tests/libknot/libknot/dname_tests.c	\
+	tests/libknot/libknot/dname_tests.h	\
+	tests/libknot/libknot/dname_table_tests.h	\
+	tests/libknot/libknot/dname_table_tests.c	\
+	tests/libknot/libknot/nsec3_tests.h	\
+	tests/libknot/libknot/nsec3_tests.c	\
+	tests/libknot/libknot/packet_tests.h	\
+	tests/libknot/libknot/packet_tests.c	\
+	tests/libknot/libknot/query_tests.h	\
+	tests/libknot/libknot/query_tests.c	\
+	tests/libknot/libknot/edns_tests.c	\
+	tests/libknot/libknot/edns_tests.h	\
+	tests/libknot/libknot/node_tests.c	\
+	tests/libknot/libknot/node_tests.h	\
+	tests/libknot/libknot/rdata_tests.c	\
+	tests/libknot/libknot/rdata_tests.h	\
+	tests/libknot/libknot/rrset_tests.c	\
+	tests/libknot/libknot/rrset_tests.h	\
+	tests/libknot/libknot/zone_tests.c	\
+	tests/libknot/libknot/zone_tests.h	\
+	tests/libknot/libknot/zone_tree_tests.h\
+	tests/libknot/libknot/zone_tree_tests.c	\
+	tests/libknot/libknot/zonedb_tests.c	\
+	tests/libknot/libknot/zonedb_tests.h	\
+	tests/libknot/unittests_libknot.c
+
+unittests_zcompile_SOURCES = \
+	zcompile/parser-util.h			\
+	zcompile/parser-descriptor.h		\
+	zcompile/zcompile-error.c		\
+	zcompile/zparser.y			\
+	zcompile/zlexer.l			\
+	zcompile/zcompile.c			\
+	zcompile/parser-util.c			\
+	zcompile/parser-descriptor.c		\
+	zcompile/tests/unittests_zp_main.c
+
+nodist_unittests_SOURCES = \
+	tests/libknot/parsed_data.rc		\
+	tests/libknot/raw_data_queries.rc	\
+	tests/libknot/raw_data.rc		\
+	tests/libknot/parsed_data_queries.rc	\
+	tests/sample_conf.rc
+
+knotd_SOURCES = \
+	knot/main.c
+
+noinst_LTLIBRARIES = libknot.la libknotd.la libknots.la
+libknot_la_SOURCES = \
+	libknot/util/libknot_error.c		\
+	libknot/util/utils.c			\
+	libknot/util/debug.c			\
+	libknot/util/debug.h			\
+	libknot/util/utils.h			\
+	libknot/util/descriptor.c		\
+	libknot/util/tolower.h			\
+	libknot/util/tolower.c			\
+	libknot/util/descriptor.h		\
+	libknot/util/wire.h			\
+	libknot/packet/query.c			\
+	libknot/packet/response.c		\
+	libknot/packet/packet.c			\
+	libknot/packet/packet.h			\
+	libknot/packet/query.h			\
+	libknot/packet/response.h		\
+	libknot/zone/zone.c			\
+	libknot/zone/zone-contents.c		\
+	libknot/zone/zone-tree.c		\
+	libknot/zone/zone-tree.h		\
+	libknot/zone/node.h			\
+	libknot/zone/zone.h			\
+	libknot/zone/zone-contents.h		\
+	libknot/zone/zonedb.c			\
+	libknot/zone/zonedb.h			\
+	libknot/zone/node.c			\
+	libknot/zone/dname-table.h		\
+	libknot/zone/dname-table.c		\
+	libknot/hash/hash-functions.c		\
+	libknot/hash/cuckoo-hash-table.c	\
+	libknot/hash/universal-system.c		\
+	libknot/hash/universal-system.h		\
+	libknot/hash/cuckoo-hash-table.h	\
+	libknot/hash/hash-functions.h		\
+	libknot/nameserver/name-server.h	\
+	libknot/nameserver/name-server.c	\
+	libknot/updates/changesets.h		\
+	libknot/updates/changesets.c		\
+	libknot/updates/xfr-in.h		\
+	libknot/updates/xfr-in.c		\
+	libknot/updates/ddns.h			\
+	libknot/updates/ddns.c			\
+	libknot/edns.c				\
+	libknot/rrset.c				\
+	libknot/dname.c				\
+	libknot/rdata.c				\
+	libknot/nsec3.c				\
+	libknot/consts.h			\
+	libknot/edns.h				\
+	libknot/rdata.h				\
+	libknot/libknot.h			\
+	libknot/dname.h				\
+	libknot/rrset.h				\
+	libknot/nsec3.h				\
+	libknot/tsig.h				\
+	libknot/tsig.c				\
+	libknot/tsig-op.h			\
+	libknot/tsig-op.c
+
+libknots_la_SOURCES = \
+	common/slab/slab.c			\
+	common/slab/malloc.c			\
+	common/slab/slab.h			\
+	common/slab/malloc.h			\
+	common/libtap/tap.c			\
+	common/libtap/tap.h			\
+	common/libtap/tap_unit.h		\
+	common/lists.c				\
+	common/base32.c				\
+	common/lists.h				\
+	common/base32.h				\
+	common/print.c				\
+	common/print.h				\
+	common/dynamic-array.c			\
+	common/skip-list.c			\
+	common/base32hex.c			\
+	common/skip-list.h			\
+	common/general-tree.h			\
+	common/general-tree.c			\
+	common/dynamic-array.h			\
+	common/tree.h				\
+	common/base32hex.h			\
+	common/evqueue.h			\
+	common/evqueue.c			\
+	common/evsched.h			\
+	common/evsched.c			\
+	common/acl.h				\
+	common/acl.c				\
+	common/sockaddr.h			\
+	common/sockaddr.c			\
+	common/crc.h				\
+	common/crc.c				\
+	common/ref.h				\
+	common/ref.c				\
+	common/errors.h				\
+	common/errors.c				\
+        common/WELL1024a.h			\
+        common/WELL1024a.c			\
+        common/fdset.h				\
+        common/fdset.c				\
+        common/fdset_poll.h			\
+        common/fdset_poll.c			\
+        common/fdset_kqueue.h			\
+        common/fdset_kqueue.c			\
+        common/fdset_epoll.h			\
+        common/fdset_epoll.c			
+
+libknotd_la_SOURCES = \
+	knot/stat/gatherer.c				\
+	knot/stat/stat.c				\
+	knot/stat/gatherer.h				\
+	knot/stat/stat.h				\
+	knot/common.h				\
+	knot/other/log.c			\
+	knot/other/log.h			\
+	knot/other/debug.h			\
+	knot/other/error.h			\
+	knot/other/error.c			\
+	knot/conf/cf-parse.y			\
+	knot/conf/cf-lex.l			\
+	knot/conf/conf.c			\
+	knot/conf/logconf.c			\
+	knot/conf/logconf.h			\
+	knot/conf/conf.h			\
+	knot/ctl/process.c			\
+	knot/ctl/process.h			\
+	knot/server/dthreads.c			\
+	knot/server/journal.c			\
+	knot/server/socket.c				\
+	knot/server/server.c				\
+	knot/server/udp-handler.c			\
+	knot/server/tcp-handler.c			\
+	knot/server/xfr-handler.c			\
+	knot/server/zones.c				\
+	knot/server/socket.h				\
+	knot/server/udp-handler.h			\
+	knot/server/tcp-handler.h			\
+	knot/server/xfr-handler.h			\
+	knot/server/dthreads.h			\
+	knot/server/journal.h			\
+	knot/server/zones.h				\
+	knot/server/notify.h				\
+	knot/server/notify.c				\
+	knot/server/zones.h				\
+	knot/zone/zone-load.c			\
+	knot/zone/zone-load.h			\
+	knot/zone/zone-dump.c			\
+	knot/zone/zone-dump-text.c			\
+	knot/zone/zone-dump-text.h			\
+	knot/zone/zone-dump.h			\
+	knot/server/server.h
+
+libknotd_la_LIBADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+libknots_la_LIBADD = @LIBOBJS@
+knotd_LDADD = libknotd.la ../libknot/libknot.la libknots.la @LIBOBJS@
+knotc_LDADD = libknotd.la ../libknot/libknot.la libknots.la @LIBOBJS@
+knot_zcompile_LDADD = libknots.la ../libknot/libknot.la libknotd.la @LIBOBJS@
+unittests_LDADD = libknotd.la libknots.la @LIBOBJS@
+unittests_zcompile_LDADD = ../libknot/libknot.la libknots.la libknotd.la @LIBOBJS@
+unittests_libknot_LDADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+unittests_libknot_realdata_LDADD = ../libknot/libknot.la libknots.la @LIBOBJS@
+all: $(BUILT_SOURCES) config.h
+	$(MAKE) $(AM_MAKEFLAGS) all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .l .lo .o .obj .y
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+config.h: stamp-h1
+	@if test ! -f $@; then \
+	  rm -f stamp-h1; \
+	  $(MAKE) $(AM_MAKEFLAGS) stamp-h1; \
+	else :; fi
+
+stamp-h1: $(srcdir)/config.h.in $(top_builddir)/config.status
+	@rm -f stamp-h1
+	cd $(top_builddir) && $(SHELL) ./config.status src/config.h
+$(srcdir)/config.h.in: @MAINTAINER_MODE_TRUE@ $(am__configure_deps) 
+	($(am__cd) $(top_srcdir) && $(AUTOHEADER))
+	rm -f stamp-h1
+	touch $@
+
+distclean-hdr:
+	-rm -f config.h stamp-h1
+
+clean-noinstLTLIBRARIES:
+	-test -z "$(noinst_LTLIBRARIES)" || rm -f $(noinst_LTLIBRARIES)
+	@list='$(noinst_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+libknot.la: $(libknot_la_OBJECTS) $(libknot_la_DEPENDENCIES) 
+	$(LINK)  $(libknot_la_OBJECTS) $(libknot_la_LIBADD) $(LIBS)
+libknotd_la-cf-parse.h: libknotd_la-cf-parse.c
+	@if test ! -f $@; then \
+	  rm -f libknotd_la-cf-parse.c; \
+	  $(MAKE) $(AM_MAKEFLAGS) libknotd_la-cf-parse.c; \
+	else :; fi
+libknotd.la: $(libknotd_la_OBJECTS) $(libknotd_la_DEPENDENCIES) 
+	$(LINK)  $(libknotd_la_OBJECTS) $(libknotd_la_LIBADD) $(LIBS)
+libknots.la: $(libknots_la_OBJECTS) $(libknots_la_DEPENDENCIES) 
+	$(LINK)  $(libknots_la_OBJECTS) $(libknots_la_LIBADD) $(LIBS)
+install-libexecPROGRAMS: $(libexec_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	test -z "$(libexecdir)" || $(MKDIR_P) "$(DESTDIR)$(libexecdir)"
+	@list='$(libexec_PROGRAMS)'; test -n "$(libexecdir)" || list=; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p || test -f $$p1; \
+	  then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(libexecdir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(libexecdir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-libexecPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(libexec_PROGRAMS)'; test -n "$(libexecdir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' `; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(libexecdir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(libexecdir)" && rm -f $$files
+
+clean-libexecPROGRAMS:
+	@list='$(libexec_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+install-sbinPROGRAMS: $(sbin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	test -z "$(sbindir)" || $(MKDIR_P) "$(DESTDIR)$(sbindir)"
+	@list='$(sbin_PROGRAMS)'; test -n "$(sbindir)" || list=; \
+	for p in $$list; do echo "$$p $$p"; done | \
+	sed 's/$(EXEEXT)$$//' | \
+	while read p p1; do if test -f $$p || test -f $$p1; \
+	  then echo "$$p"; echo "$$p"; else :; fi; \
+	done | \
+	sed -e 'p;s,.*/,,;n;h' -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(sbindir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(sbindir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-sbinPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(sbin_PROGRAMS)'; test -n "$(sbindir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' `; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(sbindir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(sbindir)" && rm -f $$files
+
+clean-sbinPROGRAMS:
+	@list='$(sbin_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+zparser.h: zparser.c
+	@if test ! -f $@; then \
+	  rm -f zparser.c; \
+	  $(MAKE) $(AM_MAKEFLAGS) zparser.c; \
+	else :; fi
+knot-zcompile$(EXEEXT): $(knot_zcompile_OBJECTS) $(knot_zcompile_DEPENDENCIES) 
+	@rm -f knot-zcompile$(EXEEXT)
+	$(LINK) $(knot_zcompile_OBJECTS) $(knot_zcompile_LDADD) $(LIBS)
+knotc$(EXEEXT): $(knotc_OBJECTS) $(knotc_DEPENDENCIES) 
+	@rm -f knotc$(EXEEXT)
+	$(LINK) $(knotc_OBJECTS) $(knotc_LDADD) $(LIBS)
+knotd$(EXEEXT): $(knotd_OBJECTS) $(knotd_DEPENDENCIES) 
+	@rm -f knotd$(EXEEXT)
+	$(LINK) $(knotd_OBJECTS) $(knotd_LDADD) $(LIBS)
+unittests$(EXEEXT): $(unittests_OBJECTS) $(unittests_DEPENDENCIES) 
+	@rm -f unittests$(EXEEXT)
+	$(LINK) $(unittests_OBJECTS) $(unittests_LDADD) $(LIBS)
+unittests-libknot$(EXEEXT): $(unittests_libknot_OBJECTS) $(unittests_libknot_DEPENDENCIES) 
+	@rm -f unittests-libknot$(EXEEXT)
+	$(LINK) $(unittests_libknot_OBJECTS) $(unittests_libknot_LDADD) $(LIBS)
+unittests-libknot-realdata$(EXEEXT): $(unittests_libknot_realdata_OBJECTS) $(unittests_libknot_realdata_DEPENDENCIES) 
+	@rm -f unittests-libknot-realdata$(EXEEXT)
+	$(LINK) $(unittests_libknot_realdata_OBJECTS) $(unittests_libknot_realdata_LDADD) $(LIBS)
+unittests-zcompile$(EXEEXT): $(unittests_zcompile_OBJECTS) $(unittests_zcompile_DEPENDENCIES) 
+	@rm -f unittests-zcompile$(EXEEXT)
+	$(LINK) $(unittests_zcompile_OBJECTS) $(unittests_zcompile_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/WELL1024a.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/acl.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/acl_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/base32.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/base32hex.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/changesets.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/conf.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/conf_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/crc.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cuckoo-hash-table.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cuckoo_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/da_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ddns.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/debug.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/descriptor.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dname-table.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dname.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dname_table_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dname_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dname_tests_realdata.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dthreads.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dthreads_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dynamic-array.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/edns.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/edns_tests.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/edns_tests_realdata.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/error.Plo@am__quote@
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+	@list='$(man8_MANS)'; test -n "$(man8dir)" || exit 0; \
+	{ for i in $$list; do echo "$$i"; done; \
+	} | while read p; do \
+	  if test -f $$p; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; echo "$$p"; \
+	done | \
+	sed -e 'n;s,.*/,,;p;h;s,.*\.,,;s,^[^8][0-9a-z]*$$,8,;x' \
+	      -e 's,\.[0-9a-z]*$$,,;$(transform);G;s,\n,.,' | \
+	sed 'N;N;s,\n, ,g' | { \
+	list=; while read file base inst; do \
+	  if test "$$base" = "$$inst"; then list="$$list $$file"; else \
+	    echo " $(INSTALL_DATA) '$$file' '$(DESTDIR)$(man8dir)/$$inst'"; \
+	    $(INSTALL_DATA) "$$file" "$(DESTDIR)$(man8dir)/$$inst" || exit $$?; \
+	  fi; \
+	done; \
+	for i in $$list; do echo "$$i"; done | $(am__base_list) | \
+	while read files; do \
+	  test -z "$$files" || { \
+	    echo " $(INSTALL_DATA) $$files '$(DESTDIR)$(man8dir)'"; \
+	    $(INSTALL_DATA) $$files "$(DESTDIR)$(man8dir)" || exit $$?; }; \
+	done; }
+
+uninstall-man8:
+	@$(NORMAL_UNINSTALL)
+	@list='$(man8_MANS)'; test -n "$(man8dir)" || exit 0; \
+	files=`{ for i in $$list; do echo "$$i"; done; \
+	} | sed -e 's,.*/,,;h;s,.*\.,,;s,^[^8][0-9a-z]*$$,8,;x' \
+	      -e 's,\.[0-9a-z]*$$,,;$(transform);G;s,\n,.,'`; \
+	test -z "$$files" || { \
+	  echo " ( cd '$(DESTDIR)$(man8dir)' && rm -f" $$files ")"; \
+	  cd "$(DESTDIR)$(man8dir)" && rm -f $$files; }
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES) config.h.in $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS) config.h.in $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES) config.h.in $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS) config.h.in $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@list='$(MANS)'; if test -n "$$list"; then \
+	  list=`for p in $$list; do \
+	    if test -f $$p; then d=; else d="$(srcdir)/"; fi; \
+	    if test -f "$$d$$p"; then echo "$$d$$p"; else :; fi; done`; \
+	  if test -n "$$list" && \
+	    grep 'ab help2man is required to generate this page' $$list >/dev/null; then \
+	    echo "error: found man pages containing the \`missing help2man' replacement text:" >&2; \
+	    grep -l 'ab help2man is required to generate this page' $$list | sed 's/^/         /' >&2; \
+	    echo "       to fix them, install help2man, remove and regenerate the man pages;" >&2; \
+	    echo "       typically \`make maintainer-clean' will remove them" >&2; \
+	    exit 1; \
+	  else :; fi; \
+	else :; fi
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) check-am
+all-am: Makefile $(LTLIBRARIES) $(PROGRAMS) $(MANS) config.h
+installdirs:
+	for dir in "$(DESTDIR)$(libexecdir)" "$(DESTDIR)$(sbindir)" "$(DESTDIR)$(man8dir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-rm -f libknotd_la-cf-lex.c
+	-rm -f libknotd_la-cf-parse.c
+	-rm -f libknotd_la-cf-parse.h
+	-rm -f zlexer.c
+	-rm -f zparser.c
+	-rm -f zparser.h
+	-test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+clean: clean-am
+
+clean-am: clean-generic clean-libexecPROGRAMS clean-libtool \
+	clean-noinstLTLIBRARIES clean-sbinPROGRAMS mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-hdr distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libexecPROGRAMS install-sbinPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man8
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libexecPROGRAMS uninstall-man \
+	uninstall-sbinPROGRAMS
+
+uninstall-man: uninstall-man8
+
+.MAKE: all check install install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libexecPROGRAMS clean-libtool clean-noinstLTLIBRARIES \
+	clean-sbinPROGRAMS ctags distclean distclean-compile \
+	distclean-generic distclean-hdr distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am \
+	install-libexecPROGRAMS install-man install-man8 install-pdf \
+	install-pdf-am install-ps install-ps-am install-sbinPROGRAMS \
+	install-strip installcheck installcheck-am installdirs \
+	maintainer-clean maintainer-clean-generic mostlyclean \
+	mostlyclean-compile mostlyclean-generic mostlyclean-libtool \
+	pdf pdf-am ps ps-am tags uninstall uninstall-am \
+	uninstall-libexecPROGRAMS uninstall-man uninstall-man8 \
+	uninstall-sbinPROGRAMS
+
+
+# automake complains on % rules:
+#   `%'-style pattern rules are a GNU make extension
+
+tests/libknot/parsed_data.rc: tests/libknot/files/parsed_data
+	../resource.sh tests/libknot/files/parsed_data >$@
+
+tests/libknot/realdata/parsed_data.rc: tests/libknot/realdata/files/parsed_data
+	../resource.sh tests/libknot/realdata/files/parsed_data >$@
+
+tests/libknot/parsed_data_queries.rc: tests/libknot/files/parsed_data_queries
+	../resource.sh tests/libknot/files/parsed_data_queries >$@
+
+tests/libknot/raw_data_queries.rc: tests/libknot/files/raw_data_queries
+	../resource.sh tests/libknot/files/raw_data_queries >$@
+
+tests/libknot/raw_data.rc: tests/libknot/files/raw_data
+	../resource.sh tests/libknot/files/raw_data >$@
+
+tests/libknot/realdata/raw_data.rc: tests/libknot/realdata/files/raw_data
+	../resource.sh tests/libknot/realdata/files/raw_data >$@
+
+tests/sample_conf.rc: tests/files/sample_conf
+	../resource.sh tests/files/sample_conf >$@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/common/WELL1024a.c b/src/common/WELL1024a.c
new file mode 100644
index 0000000..dddf75e
--- /dev/null
+++ b/src/common/WELL1024a.c
@@ -0,0 +1,116 @@
+/* ***************************************************************************** */
+/* Copyright:      Francois Panneton and Pierre L'Ecuyer, University of Montreal */
+/*                 Makoto Matsumoto, Hiroshima University                        */
+/* Notice:         This code can be used freely for personal, academic,          */
+/*                 or non-commercial purposes. For commercial purposes,          */
+/*                 please contact P. L'Ecuyer at: lecuyer@iro.UMontreal.ca       */
+/* ***************************************************************************** */
+
+#include <pthread.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdio.h>
+
+#include "WELL1024a.h"
+
+#define W 32
+#define M1 3
+#define M2 24
+#define M3 10
+
+#define MAT0POS(t,v) (v^(v>>t))
+#define MAT0NEG(t,v) (v^(v<<(-(t))))
+#define Identity(v) (v)
+
+#define V0(s)            (s)->state[(s)->i                   ]
+#define VM1(s)           (s)->state[((s)->i+M1) & 0x0000001fU]
+#define VM2(s)           (s)->state[((s)->i+M2) & 0x0000001fU]
+#define VM3(s)           (s)->state[((s)->i+M3) & 0x0000001fU]
+#define VRm1(s)          (s)->state[((s)->i+31) & 0x0000001fU]
+#define newV0(s)         (s)->state[((s)->i+31) & 0x0000001fU]
+#define newV1(s)         (s)->state[(s)->i                   ]
+
+#define FACT 2.32830643653869628906e-10
+
+rngstate_t* InitWELLRNG1024a (unsigned *init) {
+
+	rngstate_t *s = malloc(sizeof(rngstate_t));
+	if (s == 0) {
+		return 0;
+	}
+
+	s->i = 0;
+	for (int j = 0; j < WELL1024_WIDTH; j++)
+		s->state[j] = init[j];
+	return s;
+}
+
+double WELLRNG1024a (rngstate_t* s) {
+	unsigned z0 = VRm1(s);
+	unsigned z1 = Identity(V0(s))       ^ MAT0POS (8, VM1(s));
+	unsigned z2 = MAT0NEG (-19, VM2(s)) ^ MAT0NEG(-14,VM3(s));
+	newV1(s) = z1                 ^ z2;
+	newV0(s) = MAT0NEG (-11,z0)   ^ MAT0NEG(-7,z1)    ^ MAT0NEG(-13,z2) ;
+	s->i = (s->i + 31) & 0x0000001fU;
+	return ((double) s->state[s->i]  * FACT);
+}
+
+/*! \brief TLS unique key for each thread seed. */
+static pthread_key_t tls_prng_key;
+static pthread_once_t tls_prng_once = PTHREAD_ONCE_INIT;
+
+static void tls_prng_deinit(void *ptr)
+{
+	free(ptr);
+}
+
+static void tls_prng_deinit_main()
+{
+	tls_prng_deinit(pthread_getspecific(tls_prng_key));
+}
+
+static void tls_prng_init()
+{
+	(void) pthread_key_create(&tls_prng_key, tls_prng_deinit);
+	atexit(tls_prng_deinit_main); // Main thread cleanup
+}
+
+double tls_rand()
+{
+	/* Setup PRNG state for current thread. */
+	(void)pthread_once(&tls_prng_once, tls_prng_init);
+
+	/* Create PRNG state if not exists. */
+	rngstate_t* s = pthread_getspecific(tls_prng_key);
+	if (!s) {
+		/* Initialize seed from system PRNG generator. */
+		unsigned init[WELL1024_WIDTH];
+		FILE *fp = fopen("/dev/urandom", "r");
+		for (unsigned i = 0; i < WELL1024_WIDTH; ++i) {
+			int rc = fread(&init[i], sizeof(unsigned), 1, fp);
+			rc = rc;
+		}
+		fclose(fp);
+
+		/* Initialize PRNG state. */
+		s = InitWELLRNG1024a(init);
+		(void)pthread_setspecific(tls_prng_key, s);
+	}
+
+	return WELLRNG1024a(s);
+}
+
+void tls_seed_set(unsigned init[WELL1024_WIDTH])
+{
+	/* Initialize new PRNG state if not exists. */
+	rngstate_t* s = pthread_getspecific(tls_prng_key);
+	if (!s) {
+		s = InitWELLRNG1024a(init);
+		(void)pthread_setspecific(tls_prng_key, s);
+	} else {
+		/* Reset PRNG state if exists. */
+		memcpy(s->state, init, sizeof(unsigned) * WELL1024_WIDTH);
+		s->i = 0;
+	}
+}
diff --git a/src/common/WELL1024a.h b/src/common/WELL1024a.h
new file mode 100644
index 0000000..04bf1a1
--- /dev/null
+++ b/src/common/WELL1024a.h
@@ -0,0 +1,32 @@
+/* ***************************************************************************** */
+/* Copyright:      Francois Panneton and Pierre L'Ecuyer, University of Montreal */
+/*                 Makoto Matsumoto, Hiroshima University                        */
+/* Notice:         This code can be used freely for personal, academic,          */
+/*                 or non-commercial purposes. For commercial purposes,          */
+/*                 please contact P. L'Ecuyer at: lecuyer@iro.UMontreal.ca       */
+/* ***************************************************************************** */
+
+#define WELL1024_WIDTH 32 /* 128 bytes */
+
+typedef struct {
+	unsigned i;
+	unsigned state[WELL1024_WIDTH];
+} rngstate_t;
+
+rngstate_t* InitWELLRNG1024a (unsigned *init);
+double WELLRNG1024a (rngstate_t* s);
+
+/*!
+ * \brief Get pseudorandom number from PRNG initialized in thread-local storage.
+ *
+ * No need for initialization, TLS will take care of it.
+ *
+ * \retval Pseudorandom number.
+ */
+double tls_rand();
+
+/*!
+ * \brief Set PRNG seed in thread-local storage to requested value.
+ *
+ */
+void tls_seed_set(unsigned init[WELL1024_WIDTH]);
diff --git a/src/common/acl.c b/src/common/acl.c
new file mode 100644
index 0000000..e73c4dd
--- /dev/null
+++ b/src/common/acl.c
@@ -0,0 +1,185 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "common/acl.h"
+
+static int acl_compare(void *k1, void *k2)
+{
+	sockaddr_t* a1 = (sockaddr_t *)k1;
+	sockaddr_t* a2 = (sockaddr_t *)k2;
+
+	/* Check different length, IPv4 goes first. */
+	int ldiff = a1->len - a2->len;
+	if (ldiff != 0) {
+		return ldiff < 0 ? -1 : 1;
+	}
+
+	/* Compare integers if IPv4. */
+	if (a1->len == sizeof(struct sockaddr_in)) {
+
+		/* Allow if k1 == INADDR_ANY. */
+		if (a1->addr4.sin_addr.s_addr == 0) {
+			return 0;
+		}
+
+		/* Compare address. */
+		ldiff = a1->addr4.sin_addr.s_addr - a2->addr4.sin_addr.s_addr;
+		if (ldiff != 0) {
+			return ldiff < 0 ? -1 : 1;
+		}
+
+		/* Port = 0 means any port match. */
+		if (a1->addr4.sin_port == 0) {
+			return 0;
+		}
+
+		/* Compare ports on address match. */
+		ldiff = ntohs(a1->addr4.sin_port) - ntohs(a2->addr4.sin_port);
+		if (ldiff != 0) {
+			return ldiff < 0 ? -1 : 1;
+		}
+		return 0;
+	}
+
+	/* IPv6 matching. */
+#ifndef DISABLE_IPV6
+	if (a1->len == sizeof(struct sockaddr_in6)) {
+
+		/* Compare address. */
+		/*! \todo Maybe use memcmp()? */
+		ldiff = 0;
+		const unsigned int *a6 = (const unsigned int *)&a1->addr6.sin6_addr;
+		const unsigned int *b6 = (const unsigned int *)&a2->addr6.sin6_addr;
+		for (int i = 0; i <  (sizeof(struct in6_addr)/ sizeof(int)) ; ++i) {
+			ldiff = a6[i] - b6[i];
+			if (ldiff < 0) {
+				return -1;
+			}
+			if (ldiff > 0) {
+				return 1;
+			}
+		}
+
+		/* Port = 0 means any port match. */
+		if (a1->addr6.sin6_port == 0) {
+			return 0;
+		}
+
+		/* Compare ports on address match. */
+		ldiff = ntohs(a1->addr6.sin6_port) - ntohs(a2->addr6.sin6_port);
+		if (ldiff != 0) {
+			return ldiff < 0 ? -1 : 1;
+		}
+		return 0;
+	}
+#endif
+
+	return 0;
+}
+
+acl_t *acl_new(acl_rule_t default_rule, const char *name)
+{
+	/* Trailing '\0' for NULL name. */
+	size_t name_len = 1;
+	if (name) {
+		name_len += strlen(name);
+	} else {
+		name = "";
+	}
+
+	/* Allocate memory for ACL. */
+	acl_t* acl = malloc(sizeof(acl_t) + name_len);
+	if (!acl) {
+		return 0;
+	}
+
+	/* Initialize skip list. */
+	acl->rules = skip_create_list(acl_compare);
+	if (!acl->rules) {
+		free(acl);
+		return 0;
+	}
+
+	/* Initialize. */
+	memcpy(&acl->name, name, name_len);
+	acl->default_rule = default_rule;
+	return acl;
+}
+
+void acl_delete(acl_t **acl)
+{
+	if ((acl == NULL) || (*acl == NULL)) {
+		return;
+	}
+
+	/* Truncate rules. */
+	if (acl_truncate(*acl) != ACL_ACCEPT) {
+		return;
+	}
+
+	/* Free ACL. */
+	free(*acl);
+	*acl = 0;
+}
+
+int acl_create(acl_t *acl, const sockaddr_t* addr, acl_rule_t rule)
+{
+	if (!acl || !addr || rule < 0) {
+		return ACL_ERROR;
+	}
+
+	/* Insert into skip list. */
+	sockaddr_t *key = malloc(sizeof(sockaddr_t));
+	memcpy(key, addr, sizeof(sockaddr_t));
+
+	skip_insert(acl->rules, key, (void*)((ssize_t)rule + 1), 0);
+
+	return ACL_ACCEPT;
+}
+
+int acl_match(acl_t *acl, sockaddr_t* addr)
+{
+	if (!acl || !addr) {
+		return ACL_ERROR;
+	}
+
+	/* Return default rule if not found.
+	 * Conversion to the same length integer is made,
+	 * but we can be sure, that the value range is within <-1,1>.
+	 */
+	ssize_t val = ((ssize_t)skip_find(acl->rules, addr)) - 1;
+	if (val < 0) {
+		return acl->default_rule;
+	}
+
+	/* Return stored rule if found. */
+	return (int)val;
+}
+
+int acl_truncate(acl_t *acl)
+{
+	if (acl == NULL) {
+		return ACL_ERROR;
+	}
+
+	/* Destroy all rules. */
+	skip_destroy_list(&acl->rules, free, 0);
+
+	return ACL_ACCEPT;
+}
diff --git a/src/common/acl.h b/src/common/acl.h
new file mode 100644
index 0000000..c79db7f
--- /dev/null
+++ b/src/common/acl.h
@@ -0,0 +1,138 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file acl.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Access control lists.
+ *
+ * An access control list is a named structure
+ * for efficient IP address and port matching.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_ACL_H_
+#define _KNOTD_ACL_H_
+
+#include "common/skip-list.h"
+#include "common/sockaddr.h"
+
+/*! \brief ACL rules types. */
+typedef enum acl_rule_t {
+	ACL_ERROR  = -1,
+	ACL_DENY   =  0,
+	ACL_ACCEPT =  1
+} acl_rule_t;
+
+/*! \brief ACL structure. */
+typedef struct acl_t {
+	acl_rule_t default_rule;
+	skip_list_t *rules;
+	const char name[];
+} acl_t;
+
+/*!
+ * \brief Create a new ACL.
+ *
+ * \param default_rule Default rule for address matching.
+ * \param name ACL symbolic name (or NULL).
+ *
+ * \retval New ACL instance when successful.
+ * \retval NULL on errors.
+ */
+acl_t *acl_new(acl_rule_t default_rule, const char *name);
+
+/*!
+ * \brief Delete ACL structure.
+ *
+ * \param acl Pointer to ACL instance.
+ */
+void acl_delete(acl_t **acl);
+
+/*!
+ * \brief Create new ACL rule.
+ *
+ * \todo Support address subnets.
+ *
+ * \param acl Pointer to ACL instance.
+ * \param addr IP address (will be duplicated).
+ * \param rule Rule.
+ *
+ * \retval ACL_ACCEPT if successful.
+ * \retval ACP_ERROR on error.
+ */
+int acl_create(acl_t *acl, const sockaddr_t* addr, acl_rule_t rule);
+
+/*!
+ * \brief Match address against ACL.
+ *
+ * \param acl Pointer to ACL instance.
+ * \param addr IP address.
+ *
+ * \retval ACL_ACCEPT if the address is accepted.
+ * \retval ACL_DENY if the address is not accepted.
+ * \retval ACP_ERROR on error.
+ */
+int acl_match(acl_t *acl, sockaddr_t* addr);
+
+/*!
+ * \brief Truncate ACL.
+ *
+ * All but the default rule will be dropped.
+ *
+ * \param acl Pointer to ACL instance.
+ *
+ * \retval ACL_ACCEPT if successful.
+ * \retval ACP_ERROR on error.
+ */
+int acl_truncate(acl_t *acl);
+
+/*!
+ * \brief Return ACL name.
+ *
+ * \param acl Pointer to ACL instance.
+ *
+ * \retval ACL name.
+ */
+static inline const char* acl_name(acl_t *acl) {
+	if (!acl) {
+		return 0;
+	}
+
+	return acl->name;
+}
+
+/*!
+ * \brief Return ACL rules.
+ *
+ * \param acl Pointer to ACL instance.
+ *
+ * \retval ACL rules skip-list.
+ */
+static inline skip_list_t* acl_rules(acl_t *acl) {
+        if (!acl) {
+                return 0;
+        }
+
+        return acl->rules;
+}
+
+#endif /* _KNOTD_ACL_H_ */
+
+/*! @} */
diff --git a/src/common/base32.c b/src/common/base32.c
new file mode 100644
index 0000000..43b86c1
--- /dev/null
+++ b/src/common/base32.c
@@ -0,0 +1,539 @@
+/* base32.c -- Encode binary data using printable characters.
+   Copyright (C) 1999, 2000, 2001, 2004, 2005, 2006, 2010 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Adapted from base64.{h,c} by Ondřej Surý.  base64.{h,c} was written
+ * by Simon Josefsson.  Partially adapted from GNU MailUtils
+ * (mailbox/filter_trans.c, as of 2004-11-28).  Improved by review
+ * from Paul Eggert, Bruno Haible, and Stepan Kasal.
+ *
+ * See also RFC 4648 <http://www.ietf.org/rfc/rfc4648.txt>.
+ *
+ * Be careful with error checking.  Here is how you would typically
+ * use these functions:
+ *
+ * bool ok = base32_decode_alloc (in, inlen, &out, &outlen);
+ * if (!ok)
+ *   FAIL: input was not valid base32
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN
+ *
+ * size_t outlen = base32_encode_alloc (in, inlen, &out);
+ * if (out == NULL && outlen == 0 && inlen != 0)
+ *   FAIL: input too long
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN.
+ *
+ */
+
+/* Get prototype. */
+#include "base32.h"
+
+/* Get malloc. */
+#include <stdlib.h>
+
+/* Get UCHAR_MAX. */
+#include <limits.h>
+
+/* C89 compliant way to cast 'char' to 'unsigned char'. */
+static inline unsigned char to_uchar(char ch)
+{
+	return ch;
+}
+
+/* Base32 encode IN array of size INLEN into OUT array of size OUTLEN.
+   If OUTLEN is less than BASE32_LENGTH(INLEN), write as many bytes as
+   possible.  If OUTLEN is larger than BASE32_LENGTH(INLEN), also zero
+   terminate the output buffer. */
+void base32_encode(const char *in, size_t inlen, char *out, size_t outlen)
+{
+	static const char b32str[32] =
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+
+	while (inlen && outlen) {
+		*out++ = b32str[(to_uchar(in[0]) >> 3) & 0x1f];
+		if (!--outlen) {
+			break;
+		}
+		*out++ = b32str[((to_uchar(in[0]) << 2)
+		                + (--inlen ? to_uchar(in[1]) >> 6 : 0))
+		                & 0x1f];
+		if (!--outlen) {
+			break;
+		}
+		*out++ =(inlen
+		         ? b32str[(to_uchar(in[1]) >> 1) & 0x1f]
+		         : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		         ? b32str[((to_uchar(in[1]) << 4)
+		                   + (--inlen ? to_uchar(in[2]) >> 4 : 0))
+		                   & 0x1f]
+		         : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[((to_uchar(in[2]) << 1)
+		                   + (--inlen ? to_uchar(in[3]) >> 7 : 0))
+		                   & 0x1f]
+		          : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[(to_uchar(in[3]) >> 2) & 0x1f]
+		          : '=');
+		if (!--outlen)
+		{
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[((to_uchar(in[3]) << 3)
+		                   + (--inlen ? to_uchar(in[4]) >> 5 : 0))
+		                   & 0x1f]
+		          : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = inlen ? b32str[to_uchar(in[4]) & 0x1f] : '=';
+		if (!--outlen) {
+			break;
+		}
+		if (inlen) {
+			inlen--;
+		}
+		if (inlen) {
+			in += 5;
+		}
+	}
+
+	if (outlen) {
+		*out = '\0';
+	}
+}
+
+/* Allocate a buffer and store zero terminated base32 encoded data
+   from array IN of size INLEN, returning BASE32_LENGTH(INLEN), i.e.,
+   the length of the encoded data, excluding the terminating zero.  On
+   return, the OUT variable will hold a pointer to newly allocated
+   memory that must be deallocated by the caller.  If output string
+   length would overflow, 0 is returned and OUT is set to NULL.  If
+   memory allocation failed, OUT is set to NULL, and the return value
+   indicates length of the requested memory block, i.e.,
+   BASE32_LENGTH(inlen) + 1. */
+size_t base32_encode_alloc(const char *in, size_t inlen, char **out)
+{
+	size_t outlen = 1 + BASE32_LENGTH (inlen);
+
+	/* Check for overflow in outlen computation.
+	 *
+	 * If there is no overflow, outlen >= inlen.
+	 *
+	 * If the operation (inlen + 2) overflows then it yields at most +1, so
+	 * outlen is 0.
+	 *
+	 * If the multiplication overflows, we lose at least half of the
+	 * correct value, so the result is < ((inlen + 2) / 3) * 2, which is
+	 * less than (inlen + 2) * 0.66667, which is less than inlen as soon as
+	 * (inlen > 4).
+	 */
+	if (inlen > outlen)
+	{
+		*out = NULL;
+		return 0;
+	}
+
+	*out = malloc(outlen);
+	if (!*out) {
+		return outlen;
+	}
+
+	base32_encode(in, inlen, *out, outlen);
+
+	return outlen - 1;
+}
+
+/* With this approach this file works independent of the charset used
+   (think EBCDIC).  However, it does assume that the characters in the
+   Base32 alphabet (A-Z2-7) are encoded in 0..255.  POSIX
+   1003.1-2001 require that char and unsigned char are 8-bit
+   quantities, though, taking care of that problem.  But this may be a
+   potential problem on non-POSIX C99 platforms.
+
+   IBM C V6 for AIX mishandles "#define B32(x) ...'x'...", so use "_"
+   as the formal parameter rather than "x".  */
+#define B32(_)					\
+	((_) == 'A' ? 0				\
+	 : (_) == 'B' ? 1			\
+	 : (_) == 'C' ? 2			\
+	 : (_) == 'D' ? 3			\
+	 : (_) == 'E' ? 4			\
+	 : (_) == 'F' ? 5			\
+	 : (_) == 'G' ? 6			\
+	 : (_) == 'H' ? 7			\
+	 : (_) == 'I' ? 8			\
+	 : (_) == 'J' ? 9			\
+	 : (_) == 'K' ? 10			\
+	 : (_) == 'L' ? 11			\
+	 : (_) == 'M' ? 12			\
+	 : (_) == 'N' ? 13			\
+	 : (_) == 'O' ? 14			\
+	 : (_) == 'P' ? 15			\
+	 : (_) == 'Q' ? 16			\
+	 : (_) == 'R' ? 17			\
+	 : (_) == 'S' ? 18			\
+	 : (_) == 'T' ? 19			\
+	 : (_) == 'U' ? 20			\
+	 : (_) == 'V' ? 21			\
+	 : (_) == 'W' ? 22			\
+	 : (_) == 'X' ? 23			\
+	 : (_) == 'Y' ? 24			\
+	 : (_) == 'Z' ? 25			\
+	 : (_) == '2' ? 26			\
+	 : (_) == '3' ? 27			\
+	 : (_) == '4' ? 28			\
+	 : (_) == '5' ? 29			\
+	 : (_) == '6' ? 30			\
+	 : (_) == '7' ? 31			\
+	 : -1)
+
+static const signed char b32[0x100] = {
+	B32 (0), B32 (1), B32 (2), B32 (3),
+	B32 (4), B32 (5), B32 (6), B32 (7),
+	B32 (8), B32 (9), B32 (10), B32 (11),
+	B32 (12), B32 (13), B32 (14), B32 (15),
+	B32 (16), B32 (17), B32 (18), B32 (19),
+	B32 (20), B32 (21), B32 (22), B32 (23),
+	B32 (24), B32 (25), B32 (26), B32 (27),
+	B32 (28), B32 (29), B32 (30), B32 (31),
+	B32 (32), B32 (33), B32 (34), B32 (35),
+	B32 (36), B32 (37), B32 (38), B32 (39),
+	B32 (40), B32 (41), B32 (42), B32 (43),
+	B32 (44), B32 (45), B32 (46), B32 (47),
+	B32 (48), B32 (49), B32 (50), B32 (51),
+	B32 (52), B32 (53), B32 (54), B32 (55),
+	B32 (56), B32 (57), B32 (58), B32 (59),
+	B32 (60), B32 (61), B32 (62), B32 (63),
+	B32 (64), B32 (65), B32 (66), B32 (67),
+	B32 (68), B32 (69), B32 (70), B32 (71),
+	B32 (72), B32 (73), B32 (74), B32 (75),
+	B32 (76), B32 (77), B32 (78), B32 (79),
+	B32 (80), B32 (81), B32 (82), B32 (83),
+	B32 (84), B32 (85), B32 (86), B32 (87),
+	B32 (88), B32 (89), B32 (90), B32 (91),
+	B32 (92), B32 (93), B32 (94), B32 (95),
+	B32 (96), B32 (97), B32 (98), B32 (99),
+	B32 (100), B32 (101), B32 (102), B32 (103),
+	B32 (104), B32 (105), B32 (106), B32 (107),
+	B32 (108), B32 (109), B32 (110), B32 (111),
+	B32 (112), B32 (113), B32 (114), B32 (115),
+	B32 (116), B32 (117), B32 (118), B32 (119),
+	B32 (120), B32 (121), B32 (122), B32 (123),
+	B32 (124), B32 (125), B32 (126), B32 (127),
+	B32 (128), B32 (129), B32 (130), B32 (131),
+	B32 (132), B32 (133), B32 (134), B32 (135),
+	B32 (136), B32 (137), B32 (138), B32 (139),
+	B32 (140), B32 (141), B32 (142), B32 (143),
+	B32 (144), B32 (145), B32 (146), B32 (147),
+	B32 (148), B32 (149), B32 (150), B32 (151),
+	B32 (152), B32 (153), B32 (154), B32 (155),
+	B32 (156), B32 (157), B32 (158), B32 (159),
+	B32 (160), B32 (161), B32 (162), B32 (163),
+	B32 (164), B32 (165), B32 (166), B32 (167),
+	B32 (168), B32 (169), B32 (170), B32 (171),
+	B32 (172), B32 (173), B32 (174), B32 (175),
+	B32 (176), B32 (177), B32 (178), B32 (179),
+	B32 (180), B32 (181), B32 (182), B32 (183),
+	B32 (184), B32 (185), B32 (186), B32 (187),
+	B32 (188), B32 (189), B32 (190), B32 (191),
+	B32 (192), B32 (193), B32 (194), B32 (195),
+	B32 (196), B32 (197), B32 (198), B32 (199),
+	B32 (200), B32 (201), B32 (202), B32 (203),
+	B32 (204), B32 (205), B32 (206), B32 (207),
+	B32 (208), B32 (209), B32 (210), B32 (211),
+	B32 (212), B32 (213), B32 (214), B32 (215),
+	B32 (216), B32 (217), B32 (218), B32 (219),
+	B32 (220), B32 (221), B32 (222), B32 (223),
+	B32 (224), B32 (225), B32 (226), B32 (227),
+	B32 (228), B32 (229), B32 (230), B32 (231),
+	B32 (232), B32 (233), B32 (234), B32 (235),
+	B32 (236), B32 (237), B32 (238), B32 (239),
+	B32 (240), B32 (241), B32 (242), B32 (243),
+	B32 (244), B32 (245), B32 (246), B32 (247),
+	B32 (248), B32 (249), B32 (250), B32 (251),
+	B32 (252), B32 (253), B32 (254), B32 (255)
+};
+
+#if UCHAR_MAX == 255
+#define uchar_in_range(c) true
+#else
+#define uchar_in_range(c) ((c) <= 255)
+#endif
+
+/* Return true if CH is a character from the Base32 alphabet, and
+   false otherwise.  Note that '=' is padding and not considered to be
+   part of the alphabet.  */
+bool isbase32(char ch)
+{
+	return uchar_in_range(to_uchar(ch)) && 0 <= b32[to_uchar(ch)];
+}
+
+/* Decode base32 encoded input array IN of length INLEN to output
+   array OUT that can hold *OUTLEN bytes.  Return true if decoding was
+   successful, i.e. if the input was valid base32 data, false
+   otherwise.  If *OUTLEN is too small, as many bytes as possible will
+   be written to OUT.  On return, *OUTLEN holds the length of decoded
+   bytes in OUT.  Note that as soon as any non-alphabet characters are
+   encountered, decoding is stopped and false is returned.  This means
+   that, when applicable, you must remove any line terminators that is
+   part of the data stream before calling this function.  */
+bool base32_decode(const char *in, size_t inlen, char *out, size_t *outlen)
+{
+	size_t outleft = *outlen;
+
+	while (inlen >= 2) {
+		if (!isbase32(in[0]) || !isbase32(in[1])) {
+			break;
+		}
+
+		if (outleft) {
+			*out++ = ((b32[to_uchar(in[0])] << 3)
+			          | (b32[to_uchar(in[1])] >> 2));
+			outleft--;
+		}
+
+		if (inlen == 2) {
+			break;
+		}
+
+		if (in[2] == '=') {
+			if (inlen != 8) {
+				break;
+			}
+			
+			if ((in[3] != '=') ||
+			    (in[4] != '=') ||
+			    (in[5] != '=') ||
+			    (in[6] != '=') ||
+			    (in[7] != '=')) {
+				break;
+			}
+		} else {
+			if (!isbase32(in[2]) || !isbase32(in[3])) {
+				break;
+			}
+
+			if (outleft) {
+				*out++ = ((b32[to_uchar(in[1])] << 6)
+				          | ((b32[to_uchar(in[2])] << 1) & 0x3E)
+				          | (b32[to_uchar(in[3])] >> 4));
+				outleft--;
+			}
+			
+			if (inlen == 4) {
+				break;
+			}
+			
+			if (in[4] == '=') {
+				if (inlen != 8) {
+					break;
+				}
+				
+				if ((in[5] != '=') ||
+				    (in[6] != '=') ||
+				    (in[7] != '=')) {
+					break;
+				}
+			} else {
+				if (!isbase32 (in[3]) || !isbase32(in[4])) {
+					break;
+				}
+				
+				if (outleft) {
+					*out++ = ((b32[to_uchar(in[3])] << 4)
+					        | (b32[to_uchar(in[4])] >> 1));
+					outleft--;
+				}
+
+				if (inlen == 5) {
+					break;
+				}
+
+				if (in[5] == '=') {
+					if (inlen != 8) {
+						break;
+					}
+					
+					if ((in[6] != '=')
+					    || (in[7] != '=')) {
+						break;
+					}
+				} else {
+					if (!isbase32 (in[5])
+					    || !isbase32 (in[6])) {
+						break;
+					}
+					
+					if (outleft) {
+						*out++ = ((b32[to_uchar(in[4])]
+						           << 7)
+						  | (b32[to_uchar(in[5])] << 2)
+						  | (b32[to_uchar(in[6])]
+						     >> 3));
+						outleft--;
+					}
+
+					if (inlen == 7) {
+						break;
+					}
+
+					if (in[7] == '=') {
+						if (inlen != 8) {
+							break;
+						}
+					} else {
+						if (!isbase32 (in[7])) {
+							break;
+						}
+						
+						if (outleft) {
+							*out++ =
+							  ((b32[to_uchar(in[6])]
+							   << 5) | (b32[
+							     to_uchar(in[7])]));
+							outleft--;
+						}
+					}
+				}
+			}
+		}
+		
+		in += 8;
+		inlen -= 8;
+	}
+	
+	*outlen -= outleft;
+	
+	if (inlen != 0) {
+		return false;
+	}
+
+	return true;
+}
+
+/* Allocate an output buffer in *OUT, and decode the base32 encoded
+   data stored in IN of size INLEN to the *OUT buffer.  On return, the
+   size of the decoded data is stored in *OUTLEN.  OUTLEN may be NULL,
+   if the caller is not interested in the decoded length.  *OUT may be
+   NULL to indicate an out of memory error, in which case *OUTLEN
+   contains the size of the memory block needed.  The function returns
+   true on successful decoding and memory allocation errors.  (Use the
+   *OUT and *OUTLEN parameters to differentiate between successful
+   decoding and memory error.)  The function returns false if the
+   input was invalid, in which case *OUT is NULL and *OUTLEN is
+   undefined. */
+bool base32_decode_alloc(const char *in, size_t inlen, char **out,
+                         size_t *outlen)
+{
+	/* This may allocate a few bytes too much, depending on input,
+	   but it's not worth the extra CPU time to compute the exact amount.
+	   The exact amount is 5 * inlen / 8, minus 1 if the input ends
+	   with "=" and minus another 1 if the input ends with "==", etc.
+	   Dividing before multiplying avoids the possibility of overflow.  */
+	size_t needlen = 5 * (inlen / 8) + 4;
+
+	*out = malloc(needlen);
+	if (!*out) {
+		return true;
+	}
+
+	if (!base32_decode(in, inlen, *out, &needlen)) {
+		free (*out);
+		*out = NULL;
+		return false;
+	}
+
+	if (outlen) {
+		*outlen = needlen;
+	}
+
+	return true;
+}
+
+#ifdef MAIN
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include "base32.h"
+
+int main(int argc, char **argv) {
+	int i = 1;
+	size_t inlen, outlen, argvlen;
+	char *out;
+	char *in;
+	bool ok;
+
+	while (argc > 1) {
+		argv++; argc--;
+		argvlen = strlen(*argv);
+
+		outlen = base32_encode_alloc(*argv, argvlen, &out);
+
+		if (out == NULL && outlen == 0 && inlen != 0) {
+			fprintf(stderr, "ERROR(encode): input too long: %zd\n",
+			        outlen);
+			return 1;
+		}
+
+		if (out == NULL) {
+			fprintf(stderr, "ERROR(encode): memory allocation error"
+			        "\n");
+			return 1;
+		}
+
+		ok = base32_decode_alloc(out, outlen, &in, &inlen);
+
+		if (!ok) {
+			fprintf(stderr, "ERROR(decode): input was not valid "
+			        "base32: `%s'\n", out);
+			return 1;
+		}
+
+		if (in == NULL) {
+			fprintf(stderr, "ERROR(decode): memory allocation "
+			        "error\n");
+		}
+
+		if ((inlen != argvlen) ||
+		    strcmp(*argv, in) != 0) {
+			fprintf(stderr, "ERROR(encode/decode): input `%s' and "
+			        "output `%s'\n", *argv, in);
+			return 1;
+		}
+		printf("INPUT: `%s'\nENCODE: `%s'\nDECODE: `%s'\n", *argv, out,
+		       in);
+	}
+}
+
+#endif
diff --git a/src/common/base32.h b/src/common/base32.h
new file mode 100644
index 0000000..45df9fa
--- /dev/null
+++ b/src/common/base32.h
@@ -0,0 +1,121 @@
+/* base32.h -- Encode binary data using printable characters.
+   Copyright (C) 2004, 2005, 2006, 2010 Free Software Foundation, Inc.
+   Written by Ondřej Surý & Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _BASE32_H_
+#define _BASE32_H_
+
+/* Get size_t. */
+#include <stddef.h>
+
+/* Get bool. */
+#include <stdbool.h>
+
+/*!
+ * \brief Counts the size of the Base32-encoded output for given input length.
+ *
+ * \note This uses that the expression (n+(k-1))/k means the smallest
+ *       integer >= n/k, i.e., the ceiling of n/k.
+ */
+#define BASE32_LENGTH(inlen) ((((inlen) + 4) / 5) * 8)
+
+/*!
+ * \brief Checks if the given character belongs to the Base32 alphabet.
+ *
+ * \param ch Character to check.
+ *
+ * \retval true if \a ch belongs to the Base32 alphabet.
+ * \retval false otherwise.
+ */
+extern bool isbase32(char ch);
+
+/*!
+ * \brief Encodes the given character array using Base32 encoding.
+ *
+ * If \a outlen is less than BASE32_LENGTH(\a inlen), the function writes as
+ * many bytes as possible to the output buffer. If \a outlen is more than
+ * BASE32_LENGTH(\a inlen), the output will be zero-terminated.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ * \param outlen Size of the output buffer.
+ */
+extern void base32_encode(const char *in, size_t inlen, char *out,
+                          size_t outlen);
+
+/*!
+ * \brief Encodes the given character array using Base32 encoding and allocates
+ *        space for the output.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ *
+ * \return Size of the allocated output buffer (0 if failed).
+ */
+extern size_t base32_encode_alloc(const char *in, size_t inlen, char **out);
+
+/*!
+ * \brief Decodes the given character array in Base32 encoding.
+ *
+ * If \a *outlen is too small, as many bytes as possible will be written to
+ * \a out. On return, \a *outlen holds the length of decoded bytes in \a out.
+ *
+ * \note As soon as any non-alphabet characters are encountered, decoding is
+ *       stopped and false is returned.  This means that, when applicable, you
+ *       must remove any line terminators that is part of the data stream before
+ *       calling this function.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ * \param outlen Size of the output buffer.
+ *
+ * \retval true if decoding was successful, i.e. if the input was valid base32
+ *              data.
+ * \retval false otherwise.
+ */
+extern bool base32_decode(const char *in, size_t inlen, char *out,
+                          size_t *outlen);
+
+/*!
+ * \brief Allocate an output buffer and decode the base32 encoded data to it.
+ *
+ * On return, the size of the decoded data is stored in \a *outlen. \a outlen
+ * may be NULL, if the caller is not interested in the decoded length. \a *out
+ * may be NULL to indicate an out of memory error, in which case \a *outlen
+ * contains the size of the memory block needed.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer. \a *out may be NULL to indicate an out of memory
+ *            error in which case \a *outlen contains the size of the memory
+ *            block needed
+ * \param outlen Size of the output buffer. May be NULL, if the caller is not
+ *               interested in the decoded length
+ *
+ * \retval true on successful decoding and memory allocation errors. (Use the
+ *              \a *out and \a *outlen parameters to differentiate between
+ *              successful decoding and memory error.)
+ * \retval false if the input was invalid, in which case \a *out is NULL and
+ *               \a *outlen is undefined.
+ */
+extern bool base32_decode_alloc(const char *in, size_t inlen, char **out,
+                                size_t *outlen);
+
+#endif /* _BASE32_H_ */
diff --git a/src/common/base32hex.c b/src/common/base32hex.c
new file mode 100644
index 0000000..cd2d2ce
--- /dev/null
+++ b/src/common/base32hex.c
@@ -0,0 +1,562 @@
+/* base32hex.c -- Encode binary data using printable characters.
+   Copyright (C) 1999, 2000, 2001, 2004, 2005, 2006, 2010 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Adapted from base32.{h,c}.  base32.{h,c} was adapted from
+ * base64.{h,c} by Ondřej Surý.  base64.{h,c} was written by Simon
+ * Josefsson.  Partially adapted from GNU MailUtils
+ * (mailbox/filter_trans.c, as of 2004-11-28).  Improved by review
+ * from Paul Eggert, Bruno Haible, and Stepan Kasal.
+ *
+ * See also RFC 4648 <http://www.ietf.org/rfc/rfc4648.txt>.
+ *
+ * Be careful with error checking.  Here is how you would typically
+ * use these functions:
+ *
+ * bool ok = base32hex_decode_alloc (in, inlen, &out, &outlen);
+ * if (!ok)
+ *   FAIL: input was not valid base32hex
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN
+ *
+ * size_t outlen = base32hex_encode_alloc (in, inlen, &out);
+ * if (out == NULL && outlen == 0 && inlen != 0)
+ *   FAIL: input too long
+ * if (out == NULL)
+ *   FAIL: memory allocation error
+ * OK: data in OUT/OUTLEN.
+ *
+ */
+
+/* Get prototype. */
+#include "base32hex.h"
+
+/* Get malloc. */
+#include <stdlib.h>
+
+/* Get UCHAR_MAX. */
+#include <limits.h>
+
+/* C89 compliant way to cast 'char' to 'unsigned char'. */
+static inline unsigned char to_uchar(char ch)
+{
+	return ch;
+}
+
+/* Base32hex encode IN array of size INLEN into OUT array of size OUTLEN.
+   If OUTLEN is less than BASE32HEX_LENGTH(INLEN), write as many bytes as
+   possible.  If OUTLEN is larger than BASE32HEX_LENGTH(INLEN), also zero
+   terminate the output buffer. */
+void base32hex_encode(const char *in, size_t inlen, char *out, size_t outlen)
+{
+	static const char b32str[32] =
+		"0123456789ABCDEFGHIJKLMNOPQRSTUV";
+
+	while (inlen && outlen) {
+		*out++ = b32str[(to_uchar(in[0]) >> 3) & 0x1f];
+		if (!--outlen) {
+			break;
+		}
+		*out++ = b32str[((to_uchar(in[0]) << 2)
+		                + (--inlen ? to_uchar(in[1]) >> 6 : 0))
+		                & 0x1f];
+		if (!--outlen) {
+			break;
+		}
+		*out++ =(inlen
+		         ? b32str[(to_uchar(in[1]) >> 1) & 0x1f]
+		         : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		         ? b32str[((to_uchar(in[1]) << 4)
+		                   + (--inlen ? to_uchar(in[2]) >> 4 : 0))
+		                   & 0x1f]
+		         : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[((to_uchar(in[2]) << 1)
+		                   + (--inlen ? to_uchar(in[3]) >> 7 : 0))
+		                   & 0x1f]
+		          : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[(to_uchar(in[3]) >> 2) & 0x1f]
+		          : '=');
+		if (!--outlen)
+		{
+			break;
+		}
+		*out++ = (inlen
+		          ? b32str[((to_uchar(in[3]) << 3)
+		                   + (--inlen ? to_uchar(in[4]) >> 5 : 0))
+		                   & 0x1f]
+		          : '=');
+		if (!--outlen) {
+			break;
+		}
+		*out++ = inlen ? b32str[to_uchar(in[4]) & 0x1f] : '=';
+		if (!--outlen) {
+			break;
+		}
+		if (inlen) {
+			inlen--;
+		}
+		if (inlen) {
+			in += 5;
+		}
+	}
+
+	if (outlen) {
+		*out = '\0';
+	}
+}
+
+/* Allocate a buffer and store zero terminated base32hex encoded data
+   from array IN of size INLEN, returning BASE32HEX_LENGTH(INLEN), i.e.,
+   the length of the encoded data, excluding the terminating zero.  On
+   return, the OUT variable will hold a pointer to newly allocated
+   memory that must be deallocated by the caller.  If output string
+   length would overflow, 0 is returned and OUT is set to NULL.  If
+   memory allocation failed, OUT is set to NULL, and the return value
+   indicates length of the requested memory block, i.e.,
+   BASE32HEX_LENGTH(inlen) + 1. */
+size_t base32hex_encode_alloc(const char *in, size_t inlen, char **out)
+{
+	size_t outlen = 1 + BASE32HEX_LENGTH (inlen);
+
+	/* Check for overflow in outlen computation.
+	 *
+	 * If there is no overflow, outlen >= inlen.
+	 *
+	 * If the operation (inlen + 2) overflows then it yields at most +1, so
+	 * outlen is 0.
+	 *
+	 * If the multiplication overflows, we lose at least half of the
+	 * correct value, so the result is < ((inlen + 2) / 3) * 2, which is
+	 * less than (inlen + 2) * 0.66667, which is less than inlen as soon as
+	 * (inlen > 4).
+	 */
+	if (inlen > outlen)
+	{
+		*out = NULL;
+		return 0;
+	}
+
+	*out = malloc(outlen);
+	if (!*out) {
+		return outlen;
+	}
+
+	base32hex_encode(in, inlen, *out, outlen);
+
+	return outlen - 1;
+}
+
+/* With this approach this file works independent of the charset used
+   (think EBCDIC).  However, it does assume that the characters in the
+   Base32hex alphabet (A-Z2-7) are encoded in 0..255.  POSIX
+   1003.1-2001 require that char and unsigned char are 8-bit
+   quantities, though, taking care of that problem.  But this may be a
+   potential problem on non-POSIX C99 platforms.
+
+   IBM C V6 for AIX mishandles "#define B32(x) ...'x'...", so use "_"
+   as the formal parameter rather than "x".  */
+#define B32(_)					\
+	((_) == '0' ? 0				\
+	 : (_) == '1' ? 1			\
+	 : (_) == '2' ? 2			\
+	 : (_) == '3' ? 3			\
+	 : (_) == '4' ? 4			\
+	 : (_) == '5' ? 5			\
+	 : (_) == '6' ? 6			\
+	 : (_) == '7' ? 7			\
+	 : (_) == '8' ? 8			\
+	 : (_) == '9' ? 9			\
+	 : (_) == 'A' ? 10			\
+	 : (_) == 'B' ? 11			\
+	 : (_) == 'C' ? 12			\
+	 : (_) == 'D' ? 13			\
+	 : (_) == 'E' ? 14			\
+	 : (_) == 'F' ? 15			\
+	 : (_) == 'G' ? 16			\
+	 : (_) == 'H' ? 17			\
+	 : (_) == 'I' ? 18			\
+	 : (_) == 'J' ? 19			\
+	 : (_) == 'K' ? 20			\
+	 : (_) == 'L' ? 21			\
+	 : (_) == 'M' ? 22			\
+	 : (_) == 'N' ? 23			\
+	 : (_) == 'O' ? 24			\
+	 : (_) == 'P' ? 25			\
+	 : (_) == 'Q' ? 26			\
+	 : (_) == 'R' ? 27			\
+	 : (_) == 'S' ? 28			\
+	 : (_) == 'T' ? 29			\
+	 : (_) == 'U' ? 30			\
+	 : (_) == 'V' ? 31			\
+	 : (_) == 'a' ? 10			\
+	 : (_) == 'b' ? 11			\
+	 : (_) == 'c' ? 12			\
+	 : (_) == 'd' ? 13			\
+	 : (_) == 'e' ? 14			\
+	 : (_) == 'f' ? 15			\
+	 : (_) == 'g' ? 16			\
+	 : (_) == 'h' ? 17			\
+	 : (_) == 'i' ? 18			\
+	 : (_) == 'j' ? 19			\
+	 : (_) == 'k' ? 20			\
+	 : (_) == 'l' ? 21			\
+	 : (_) == 'm' ? 22			\
+	 : (_) == 'n' ? 23			\
+	 : (_) == 'o' ? 24			\
+	 : (_) == 'p' ? 25			\
+	 : (_) == 'q' ? 26			\
+	 : (_) == 'r' ? 27			\
+	 : (_) == 's' ? 28			\
+	 : (_) == 't' ? 29			\
+	 : (_) == 'u' ? 30			\
+	 : (_) == 'v' ? 31			\
+	 : -1)
+
+static const signed char b32[0x100] = {
+	B32 (0), B32 (1), B32 (2), B32 (3),
+	B32 (4), B32 (5), B32 (6), B32 (7),
+	B32 (8), B32 (9), B32 (10), B32 (11),
+	B32 (12), B32 (13), B32 (14), B32 (15),
+	B32 (16), B32 (17), B32 (18), B32 (19),
+	B32 (20), B32 (21), B32 (22), B32 (23),
+	B32 (24), B32 (25), B32 (26), B32 (27),
+	B32 (28), B32 (29), B32 (30), B32 (31),
+	B32 (32), B32 (33), B32 (34), B32 (35),
+	B32 (36), B32 (37), B32 (38), B32 (39),
+	B32 (40), B32 (41), B32 (42), B32 (43),
+	B32 (44), B32 (45), B32 (46), B32 (47),
+	B32 (48), B32 (49), B32 (50), B32 (51),
+	B32 (52), B32 (53), B32 (54), B32 (55),
+	B32 (56), B32 (57), B32 (58), B32 (59),
+	B32 (60), B32 (61), B32 (62), B32 (63),
+	B32 (64), B32 (65), B32 (66), B32 (67),
+	B32 (68), B32 (69), B32 (70), B32 (71),
+	B32 (72), B32 (73), B32 (74), B32 (75),
+	B32 (76), B32 (77), B32 (78), B32 (79),
+	B32 (80), B32 (81), B32 (82), B32 (83),
+	B32 (84), B32 (85), B32 (86), B32 (87),
+	B32 (88), B32 (89), B32 (90), B32 (91),
+	B32 (92), B32 (93), B32 (94), B32 (95),
+	B32 (96), B32 (97), B32 (98), B32 (99),
+	B32 (100), B32 (101), B32 (102), B32 (103),
+	B32 (104), B32 (105), B32 (106), B32 (107),
+	B32 (108), B32 (109), B32 (110), B32 (111),
+	B32 (112), B32 (113), B32 (114), B32 (115),
+	B32 (116), B32 (117), B32 (118), B32 (119),
+	B32 (120), B32 (121), B32 (122), B32 (123),
+	B32 (124), B32 (125), B32 (126), B32 (127),
+	B32 (128), B32 (129), B32 (130), B32 (131),
+	B32 (132), B32 (133), B32 (134), B32 (135),
+	B32 (136), B32 (137), B32 (138), B32 (139),
+	B32 (140), B32 (141), B32 (142), B32 (143),
+	B32 (144), B32 (145), B32 (146), B32 (147),
+	B32 (148), B32 (149), B32 (150), B32 (151),
+	B32 (152), B32 (153), B32 (154), B32 (155),
+	B32 (156), B32 (157), B32 (158), B32 (159),
+	B32 (160), B32 (161), B32 (162), B32 (163),
+	B32 (164), B32 (165), B32 (166), B32 (167),
+	B32 (168), B32 (169), B32 (170), B32 (171),
+	B32 (172), B32 (173), B32 (174), B32 (175),
+	B32 (176), B32 (177), B32 (178), B32 (179),
+	B32 (180), B32 (181), B32 (182), B32 (183),
+	B32 (184), B32 (185), B32 (186), B32 (187),
+	B32 (188), B32 (189), B32 (190), B32 (191),
+	B32 (192), B32 (193), B32 (194), B32 (195),
+	B32 (196), B32 (197), B32 (198), B32 (199),
+	B32 (200), B32 (201), B32 (202), B32 (203),
+	B32 (204), B32 (205), B32 (206), B32 (207),
+	B32 (208), B32 (209), B32 (210), B32 (211),
+	B32 (212), B32 (213), B32 (214), B32 (215),
+	B32 (216), B32 (217), B32 (218), B32 (219),
+	B32 (220), B32 (221), B32 (222), B32 (223),
+	B32 (224), B32 (225), B32 (226), B32 (227),
+	B32 (228), B32 (229), B32 (230), B32 (231),
+	B32 (232), B32 (233), B32 (234), B32 (235),
+	B32 (236), B32 (237), B32 (238), B32 (239),
+	B32 (240), B32 (241), B32 (242), B32 (243),
+	B32 (244), B32 (245), B32 (246), B32 (247),
+	B32 (248), B32 (249), B32 (250), B32 (251),
+	B32 (252), B32 (253), B32 (254), B32 (255)
+};
+
+#if UCHAR_MAX == 255
+#define uchar_in_range(c) true
+#else
+#define uchar_in_range(c) ((c) <= 255)
+#endif
+
+/* Return true if CH is a character from the Base32hex alphabet, and
+   false otherwise.  Note that '=' is padding and not considered to be
+   part of the alphabet.  */
+bool isbase32hex(char ch)
+{
+	return uchar_in_range(to_uchar(ch)) && 0 <= b32[to_uchar(ch)];
+}
+
+/* Decode base32hex encoded input array IN of length INLEN to output
+   array OUT that can hold *OUTLEN bytes.  Return true if decoding was
+   successful, i.e. if the input was valid base32hex data, false
+   otherwise.  If *OUTLEN is too small, as many bytes as possible will
+   be written to OUT.  On return, *OUTLEN holds the length of decoded
+   bytes in OUT.  Note that as soon as any non-alphabet characters are
+   encountered, decoding is stopped and false is returned.  This means
+   that, when applicable, you must remove any line terminators that is
+   part of the data stream before calling this function.  */
+bool base32hex_decode(const char *in, size_t inlen, char *out, size_t *outlen)
+{
+	size_t outleft = *outlen;
+
+	while (inlen >= 2) {
+		if (!isbase32hex(in[0]) || !isbase32hex(in[1])) {
+			break;
+		}
+
+		if (outleft) {
+			*out++ = ((b32[to_uchar(in[0])] << 3)
+			          | (b32[to_uchar(in[1])] >> 2));
+			outleft--;
+		}
+
+		if (inlen == 2) {
+			break;
+		}
+
+		if (in[2] == '=') {
+			if (inlen != 8) {
+				break;
+			}
+			
+			if ((in[3] != '=') ||
+			    (in[4] != '=') ||
+			    (in[5] != '=') ||
+			    (in[6] != '=') ||
+			    (in[7] != '=')) {
+				break;
+			}
+		} else {
+			if (!isbase32hex(in[2]) || !isbase32hex(in[3])) {
+				break;
+			}
+
+			if (outleft) {
+				*out++ = ((b32[to_uchar(in[1])] << 6)
+				          | ((b32[to_uchar(in[2])] << 1) & 0x3E)
+				          | (b32[to_uchar(in[3])] >> 4));
+				outleft--;
+			}
+			
+			if (inlen == 4) {
+				break;
+			}
+			
+			if (in[4] == '=') {
+				if (inlen != 8) {
+					break;
+				}
+				
+				if ((in[5] != '=') ||
+				    (in[6] != '=') ||
+				    (in[7] != '=')) {
+					break;
+				}
+			} else {
+				if (!isbase32hex (in[3]) || !isbase32hex(in[4])) {
+					break;
+				}
+				
+				if (outleft) {
+					*out++ = ((b32[to_uchar(in[3])] << 4)
+					        | (b32[to_uchar(in[4])] >> 1));
+					outleft--;
+				}
+
+				if (inlen == 5) {
+					break;
+				}
+
+				if (in[5] == '=') {
+					if (inlen != 8) {
+						break;
+					}
+					
+					if ((in[6] != '=')
+					    || (in[7] != '=')) {
+						break;
+					}
+				} else {
+					if (!isbase32hex (in[5])
+					    || !isbase32hex (in[6])) {
+						break;
+					}
+					
+					if (outleft) {
+						*out++ = ((b32[to_uchar(in[4])]
+						           << 7)
+						  | (b32[to_uchar(in[5])] << 2)
+						  | (b32[to_uchar(in[6])]
+						     >> 3));
+						outleft--;
+					}
+
+					if (inlen == 7) {
+						break;
+					}
+
+					if (in[7] == '=') {
+						if (inlen != 8) {
+							break;
+						}
+					} else {
+						if (!isbase32hex (in[7])) {
+							break;
+						}
+						
+						if (outleft) {
+							*out++ =
+							  ((b32[to_uchar(in[6])]
+							   << 5) | (b32[
+							     to_uchar(in[7])]));
+							outleft--;
+						}
+					}
+				}
+			}
+		}
+		
+		in += 8;
+		inlen -= 8;
+	}
+	
+	*outlen -= outleft;
+	
+	if (inlen != 0) {
+		return false;
+	}
+
+	return true;
+}
+
+/* Allocate an output buffer in *OUT, and decode the base32hex encoded
+   data stored in IN of size INLEN to the *OUT buffer.  On return, the
+   size of the decoded data is stored in *OUTLEN.  OUTLEN may be NULL,
+   if the caller is not interested in the decoded length.  *OUT may be
+   NULL to indicate an out of memory error, in which case *OUTLEN
+   contains the size of the memory block needed.  The function returns
+   true on successful decoding and memory allocation errors.  (Use the
+   *OUT and *OUTLEN parameters to differentiate between successful
+   decoding and memory error.)  The function returns false if the
+   input was invalid, in which case *OUT is NULL and *OUTLEN is
+   undefined. */
+bool base32hex_decode_alloc(const char *in, size_t inlen, char **out,
+                         size_t *outlen)
+{
+	/* This may allocate a few bytes too much, depending on input,
+	   but it's not worth the extra CPU time to compute the exact amount.
+	   The exact amount is 5 * inlen / 8, minus 1 if the input ends
+	   with "=" and minus another 1 if the input ends with "==", etc.
+	   Dividing before multiplying avoids the possibility of overflow.  */
+	size_t needlen = 5 * (inlen / 8) + 4;
+
+	*out = malloc(needlen);
+	if (!*out) {
+		return true;
+	}
+
+	if (!base32hex_decode(in, inlen, *out, &needlen)) {
+		free (*out);
+		*out = NULL;
+		return false;
+	}
+
+	if (outlen) {
+		*outlen = needlen;
+	}
+
+	return true;
+}
+
+#ifdef MAIN
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+#include "base32hex.h"
+
+int main(int argc, char **argv) {
+	int i = 1;
+	size_t inlen, outlen, argvlen;
+	char *out;
+	char *in;
+	bool ok;
+
+	while (argc > 1) {
+		argv++; argc--;
+		argvlen = strlen(*argv);
+
+		outlen = base32hex_encode_alloc(*argv, argvlen, &out);
+
+		if (out == NULL && outlen == 0 && inlen != 0) {
+			fprintf(stderr, "ERROR(encode): input too long: %zd\n",
+			        outlen);
+			return 1;
+		}
+
+		if (out == NULL) {
+			fprintf(stderr, "ERROR(encode): memory allocation error"
+			        "\n");
+			return 1;
+		}
+
+		ok = base32hex_decode_alloc(out, outlen, &in, &inlen);
+
+		if (!ok) {
+			fprintf(stderr, "ERROR(decode): input was not valid "
+			        "base32hex: `%s'\n", out);
+			return 1;
+		}
+
+		if (in == NULL) {
+			fprintf(stderr, "ERROR(decode): memory allocation "
+			        "error\n");
+		}
+
+		if ((inlen != argvlen) ||
+		    strcmp(*argv, in) != 0) {
+			fprintf(stderr, "ERROR(encode/decode): input `%s' and "
+			        "output `%s'\n", *argv, in);
+			return 1;
+		}
+		printf("INPUT: `%s'\nENCODE: `%s'\nDECODE: `%s'\n", *argv, out,
+		       in);
+	}
+}
+
+#endif
diff --git a/src/common/base32hex.h b/src/common/base32hex.h
new file mode 100644
index 0000000..9ac4fa8
--- /dev/null
+++ b/src/common/base32hex.h
@@ -0,0 +1,124 @@
+/* base32hex.h -- Encode binary data using printable characters.
+   Copyright (C) 2004, 2005, 2006, 2010 Free Software Foundation, Inc.
+   Written by Ondřej Surý & Simon Josefsson.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _BASE32HEX_H_
+#define _BASE32HEX_H_
+
+/* Get size_t. */
+#include <stddef.h>
+
+/* Get bool. */
+#include <stdbool.h>
+
+/*!
+ * \brief Counts the size of the Base32Hex-encoded output for given input
+ *        length.
+ *
+ * \note This uses that the expression (n+(k-1))/k means the smallest
+ *       integer >= n/k, i.e., the ceiling of n/k.
+ */
+#define BASE32HEX_LENGTH(inlen) ((((inlen) + 4) / 5) * 8)
+
+/*!
+ * \brief Checks if the given character belongs to the Base32Hex alphabet.
+ *
+ * \param ch Character to check.
+ *
+ * \retval true if \a ch belongs to the Base32Hex alphabet.
+ * \retval false otherwise.
+ */
+extern bool isbase32hex(char ch);
+
+/*!
+ * \brief Encodes the given character array using Base32 encoding with extended
+ *        hex alphabet.
+ *
+ * If \a outlen is less than BASE32HEX_LENGTH(\a inlen), the function writes as
+ * many bytes as possible to the output buffer. If \a outlen is more than
+ * BASE32HEX_LENGTH(\a inlen), the output will be zero-terminated.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ * \param outlen Size of the output buffer.
+ */
+extern void base32hex_encode(const char *in, size_t inlen, char *out,
+                          size_t outlen);
+
+/*!
+ * \brief Encodes the given character array using Base32 encoding with extended
+ *        hex alphabet and allocates space for the output.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ *
+ * \return Size of the allocated output buffer (0 if failed).
+ */
+extern size_t base32hex_encode_alloc(const char *in, size_t inlen, char **out);
+
+/*!
+ * \brief Decodes the given character array in Base32 encoding with extended
+ *        hex alphabet.
+ *
+ * If \a *outlen is too small, as many bytes as possible will be written to
+ * \a out. On return, \a *outlen holds the length of decoded bytes in \a out.
+ *
+ * \note As soon as any non-alphabet characters are encountered, decoding is
+ *       stopped and false is returned.  This means that, when applicable, you
+ *       must remove any line terminators that is part of the data stream before
+ *       calling this function.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer.
+ * \param outlen Size of the output buffer.
+ *
+ * \retval true if decoding was successful, i.e. if the input was valid
+ *              base32hex data.
+ * \retval false otherwise.
+ */
+extern bool base32hex_decode(const char *in, size_t inlen, char *out,
+                          size_t *outlen);
+
+/*!
+ * \brief Allocate an output buffer and decode the base32hex encoded data to it.
+ *
+ * On return, the size of the decoded data is stored in \a *outlen. \a outlen
+ * may be NULL, if the caller is not interested in the decoded length. \a *out
+ * may be NULL to indicate an out of memory error, in which case \a *outlen
+ * contains the size of the memory block needed.
+ *
+ * \param in Input array of characters.
+ * \param inlen Length of the input array.
+ * \param out Output buffer. \a *out may be NULL to indicate an out of memory
+ *            error in which case \a *outlen contains the size of the memory
+ *            block needed
+ * \param outlen Size of the output buffer. May be NULL, if the caller is not
+ *               interested in the decoded length
+ *
+ * \retval true on successful decoding and memory allocation errors. (Use the
+ *              \a *out and \a *outlen parameters to differentiate between
+ *              successful decoding and memory error.)
+ * \retval false if the input was invalid, in which case \a *out is NULL and
+ *               \a *outlen is undefined.
+ */
+extern bool base32hex_decode_alloc(const char *in, size_t inlen, char **out,
+                                size_t *outlen);
+
+#endif /* _BASE32HEX_H_ */
diff --git a/src/common/crc.c b/src/common/crc.c
new file mode 100644
index 0000000..33bf903
--- /dev/null
+++ b/src/common/crc.c
@@ -0,0 +1,155 @@
+/*
+   Copyright (c) 2006-2011, Thomas Pircher <tehpeh@gmx.net>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+   
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+   
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+ */
+
+/**
+ * \file crc.c
+ * Functions and types for CRC checks.
+ *
+ * Generated on Fri May  6 11:25:47 2011,
+ * by pycrc v0.7.7, http://www.tty1.net/pycrc/
+ * using the configuration:
+ *    Width        = 32
+ *    Poly         = 0x04c11db7
+ *    XorIn        = 0xffffffff
+ *    ReflectIn    = True
+ *    XorOut       = 0xffffffff
+ *    ReflectOut   = True
+ *    Algorithm    = table-driven
+ *****************************************************************************/
+#include "crc.h"
+#include <stdint.h>
+#include <stdlib.h>
+
+/**
+ * Static table used for the table_driven implementation.
+ *****************************************************************************/
+static const crc_t crc_table[256] = {
+    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
+    0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+    0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+    0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+    0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+    0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
+    0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+    0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+    0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
+    0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
+    0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+    0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+    0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
+    0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
+    0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+    0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+    0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
+    0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+    0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+    0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+    0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+    0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
+    0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
+    0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+    0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+    0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+    0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+    0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
+    0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+    0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+    0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
+    0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
+    0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+    0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+    0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
+    0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
+    0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+    0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+    0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
+    0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+    0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+    0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+    0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+    0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
+    0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
+    0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+    0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+    0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+/**
+ * Reflect all bits of a \a data word of \a data_len bytes.
+ *
+ * \param data         The data word to be reflected.
+ * \param data_len     The width of \a data expressed in number of bits.
+ * \return             The reflected data.
+ *****************************************************************************/
+crc_t crc_reflect(crc_t data, size_t data_len)
+{
+    unsigned int i;
+    crc_t ret;
+
+    ret = data & 0x01;
+    for (i = 1; i < data_len; i++) {
+        data >>= 1;
+        ret = (ret << 1) | (data & 0x01);
+    }
+    return ret;
+}
+
+
+/**
+ * Update the crc value with new data.
+ *
+ * \param crc      The current crc value.
+ * \param data     Pointer to a buffer of \a data_len bytes.
+ * \param data_len Number of bytes in the \a data buffer.
+ * \return         The updated crc value.
+ *****************************************************************************/
+crc_t crc_update(crc_t crc, const unsigned char *data, size_t data_len)
+{
+    unsigned int tbl_idx;
+
+    while (data_len--) {
+        tbl_idx = (crc ^ *data) & 0xff;
+        crc = (crc_table[tbl_idx] ^ (crc >> 8)) & 0xffffffff;
+
+        data++;
+    }
+    return crc & 0xffffffff;
+}
+
+
+
diff --git a/src/common/crc.h b/src/common/crc.h
new file mode 100644
index 0000000..41971a9
--- /dev/null
+++ b/src/common/crc.h
@@ -0,0 +1,110 @@
+/*
+   Copyright (c) 2006-2011, Thomas Pircher <tehpeh@gmx.net>
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+   
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+   
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+ */
+/**
+ * \file crc.h
+ * Functions and types for CRC checks.
+ *
+ * Generated on Fri May  6 11:25:43 2011,
+ * by pycrc v0.7.7, http://www.tty1.net/pycrc/
+ * using the configuration:
+ *    Width        = 32
+ *    Poly         = 0x04c11db7
+ *    XorIn        = 0xffffffff
+ *    ReflectIn    = True
+ *    XorOut       = 0xffffffff
+ *    ReflectOut   = True
+ *    Algorithm    = table-driven
+ *****************************************************************************/
+#ifndef __CRC_H__
+#define __CRC_H__
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * The definition of the used algorithm.
+ *****************************************************************************/
+#define CRC_ALGO_TABLE_DRIVEN 1
+
+
+/**
+ * The type of the CRC values.
+ *
+ * This type must be big enough to contain at least 32 bits.
+ *****************************************************************************/
+typedef uint32_t crc_t;
+
+
+/**
+ * Reflect all bits of a \a data word of \a data_len bytes.
+ *
+ * \param data         The data word to be reflected.
+ * \param data_len     The width of \a data expressed in number of bits.
+ * \return             The reflected data.
+ *****************************************************************************/
+crc_t crc_reflect(crc_t data, size_t data_len);
+
+
+/**
+ * Calculate the initial crc value.
+ *
+ * \return     The initial crc value.
+ *****************************************************************************/
+static inline crc_t crc_init(void)
+{
+    return 0xffffffff;
+}
+
+
+/**
+ * Update the crc value with new data.
+ *
+ * \param crc      The current crc value.
+ * \param data     Pointer to a buffer of \a data_len bytes.
+ * \param data_len Number of bytes in the \a data buffer.
+ * \return         The updated crc value.
+ *****************************************************************************/
+crc_t crc_update(crc_t crc, const unsigned char *data, size_t data_len);
+
+
+/**
+ * Calculate the final crc value.
+ *
+ * \param crc  The current crc value.
+ * \return     The final crc value.
+ *****************************************************************************/
+static inline crc_t crc_finalize(crc_t crc)
+{
+    return crc ^ 0xffffffff;
+}
+
+
+#ifdef __cplusplus
+}           /* closing brace for extern "C" */
+#endif
+
+#endif      /* __CRC_H__ */
diff --git a/src/common/dynamic-array.c b/src/common/dynamic-array.c
new file mode 100644
index 0000000..1e2efac
--- /dev/null
+++ b/src/common/dynamic-array.c
@@ -0,0 +1,224 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <pthread.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include <urcu.h>
+
+//#include "common.h"
+#include "common/dynamic-array.h"
+
+#ifndef ERR_ALLOC_FAILED
+#define ERR_ALLOC_FAILED fprintf(stderr, "Allocation failed at %s:%d\n", \
+				 __FILE__, __LINE__)
+#endif
+
+//#define DA_DEBUG
+
+#ifndef dbg_da
+#ifdef DA_DEBUG
+#define dbg_da(msg...) fprintf(stderr, msg)
+#else
+#define dbg_da(msg...)
+#endif
+#endif
+
+/*----------------------------------------------------------------------------*/
+/* Private functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+enum da_resize_type {
+	DA_LARGER, DA_SMALLER
+};
+
+typedef enum da_resize_type da_resize_type_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \retval 1 On success.
+ * \retval -1 On failure.
+ */
+static int da_resize(da_array_t *array, da_resize_type_t type)
+{
+	dbg_da("da_resize(): array pointer: %p, items pointer: %p\n", array,
+	         array->items);
+
+	unsigned new_size = ((type == DA_LARGER)
+	                 ? (array->allocated *= 2)
+	                 : (array->allocated /= 2));
+
+	void *new_items = malloc(new_size * array->item_size);
+	if (new_items == NULL) {
+		ERR_ALLOC_FAILED;
+		return -1;
+	}
+
+	dbg_da("Place for new items: %p\n", new_items);
+
+	// copy the contents from the old array to the new
+	memcpy(new_items, array->items, array->count * array->item_size);
+
+	// do RCU update
+	void *old_items = rcu_xchg_pointer(&array->items, new_items);
+	array->allocated = new_size;
+
+	dbg_da("Old items pointer: %p\n", old_items);
+
+	// wait for readers to finish
+	synchronize_rcu();
+	// deallocate the old array
+	dbg_da("RCU synchronized, deallocating old items array at address %p."
+	         "\n", old_items);
+	free(old_items);
+
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+/* Public functions                                                           */
+/*----------------------------------------------------------------------------*/
+
+da_array_t *da_create(unsigned count, size_t item_size)
+{
+	da_array_t *a = (da_array_t *)malloc(sizeof(da_array_t));
+	if (a == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	da_initialize(a, count, item_size);
+	return a;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int da_initialize(da_array_t *array, unsigned count, size_t item_size)
+{
+	assert(array != NULL);
+	pthread_mutex_init(&array->mtx, NULL);
+	pthread_mutex_lock(&array->mtx);
+
+	array->items = malloc(count * item_size);
+	if (array->items == NULL) {
+		array->allocated = 0;
+		array->count = 0;
+		ERR_ALLOC_FAILED;
+		return -1;
+	}
+
+	array->allocated = count;
+	array->count = 0;
+	array->item_size = item_size;
+	memset(array->items, 0, count * item_size);
+
+	pthread_mutex_unlock(&array->mtx);
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int da_reserve(da_array_t *array, unsigned count)
+{
+	pthread_mutex_lock(&array->mtx);
+	unsigned res = 0;
+
+	assert(array->allocated >= array->count);
+	if ((array->allocated - array->count) >= count) {
+		dbg_da("Enough place in the array, no resize needed.\n");
+		res = 0;
+	} else {
+		dbg_da("Resizing array.\n");
+		res = da_resize(array, DA_LARGER);
+	}
+	pthread_mutex_unlock(&array->mtx);
+
+	return res;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int da_occupy(da_array_t *array, unsigned count)
+{
+	pthread_mutex_lock(&array->mtx);
+	unsigned res = 0;
+	assert(array->allocated >= array->count);
+
+	if ((array->allocated - array->count) < count) {
+		dbg_da("Not enough place to occupy.\n");
+		res = -1;
+	} else {
+		array->count += count;
+	}
+
+	pthread_mutex_unlock(&array->mtx);
+	return res;
+}
+
+/*----------------------------------------------------------------------------*/
+
+unsigned da_try_reserve(const da_array_t *array, unsigned count)
+{
+	assert(array->allocated >= array->count);
+	if ((array->allocated - array->count) >= count) {
+		return 0;
+	}
+
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void da_release(da_array_t *array, unsigned count)
+{
+	pthread_mutex_lock(&array->mtx);
+
+	assert(array->allocated >= array->count);
+	assert(array->count >= count);
+	dbg_da("Decreasing count of items in array.\n");
+	array->count -= count;
+
+	pthread_mutex_unlock(&array->mtx);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void da_destroy(da_array_t *array)
+{
+	pthread_mutex_lock(&array->mtx);
+	void *old_items = rcu_dereference(array->items);
+	rcu_set_pointer(&array->items, NULL);
+	pthread_mutex_unlock(&array->mtx);
+
+	synchronize_rcu();
+	free(old_items);
+	pthread_mutex_destroy(&array->mtx);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void *da_get_items(const da_array_t *array)
+{
+	return array->items;
+}
+
+/*----------------------------------------------------------------------------*/
+
+unsigned da_get_count(const da_array_t *array)
+{
+	return array->count;
+}
diff --git a/src/common/dynamic-array.h b/src/common/dynamic-array.h
new file mode 100644
index 0000000..77a5d13
--- /dev/null
+++ b/src/common/dynamic-array.h
@@ -0,0 +1,156 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file dynamic-array.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Safe dynamic array implementation.
+ *
+ * \todo Somehow check if the array is initialized and do not use otherwise.
+ *       Maybe some magic, or so.
+ * \todo This structure is too slow because of the mutex.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_DYNAMIC_ARRAY_H_
+#define _KNOTD_COMMON_DYNAMIC_ARRAY_H_
+
+#include <string.h>
+#include <pthread.h>
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Dynamic array structure.
+ *
+ * Before using the dynamic array, it must be initialized using da_initialize().
+ * When getting individual items always use da_get_items() to obtain pointer to
+ * the actual array.
+ *
+ * Items in the array cannot be dereferenced (it uses void * for storing the
+ * the items). It is needed to type-cast the item array (obtained by calling
+ * da_get_items()) to a proper type before dereferencing.
+ *
+ * When adding items, first reserve enough space for them by callling
+ * da_reserve() and subsequently tell the array about the inserted items by
+ * calling da_occupy(). When removing, the array must be told about the fact
+ * by calling da_release().
+ *
+ * For getting the actual number of items in array use da_get_count().
+ *
+ * When the array is no more needed, the da_destroy() function must be called
+ * before deallocating the structure.
+ */
+struct da_array {
+	/*! \brief The actual array. The items can't be dereferenced directly.*/
+	void *items;
+
+	/*!
+	 * \brief Size of the stored items in bytes (used in counting of space
+	 *        needed.
+	 */
+	size_t item_size;
+
+	/*!
+	 * \brief Size of allocated space in number of items that can be stored.
+	 */
+	unsigned allocated;
+
+	/*! \brief Number of items actually stored in the array. */
+	unsigned count;
+
+	/*! \brief Mutex. */
+	pthread_mutex_t mtx;
+};
+
+typedef struct da_array da_array_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates and initializes the dynamic array.
+ *
+ * Initialization comprises of allocating place for \a count items of size
+ * \a item_size and setting the items to zeros.
+ *
+ * \retval 0 if successful.
+ * \retval -1 if not successful.
+ */
+da_array_t *da_create(unsigned count, size_t item_size);
+
+/*!
+ * \brief Initializes the dynamic array.
+ *
+ * Initialization comprises of allocating place for \a count items of size
+ * \a item_size and setting the items to zeros.
+ *
+ * \retval 0 if successful.
+ * \retval -1 if not successful.
+ */
+int da_initialize(da_array_t *array, unsigned count, size_t item_size);
+
+/*!
+ * \brief Reserves space for \a count more items.
+ *
+ * \retval 0 if successful and resizing was not necessary.
+ * \retval 1 if successful and the array was enlarged.
+ * \retval -1 if not successful - resizing was needed but could not be done.
+ */
+int da_reserve(da_array_t *array, unsigned count);
+
+/*!
+ * \brief Increases the number of items in array by \a count.
+ *
+ * \retval 0 If successful.
+ * \retval -1 If not successful (not enough allocated space, i.e. must run
+ *            da_reserve()).
+ */
+int da_occupy(da_array_t *array, unsigned count);
+
+/*!
+ * \brief Tries to reserve space for \a count more items.
+ *
+ * \retval 0 if successful and resizing is not necessary.
+ * \retval 1 if successful but the array will need to be resized.
+ */
+unsigned da_try_reserve(const da_array_t *array, unsigned count);
+
+/*!
+ * \brief Releases space taken by \a count items.
+ */
+void da_release(da_array_t *array, unsigned count);
+
+/*!
+ * \brief Poperly deallocates the array.
+ */
+void da_destroy(da_array_t *array);
+
+/*!
+ * \brief Returns the array of items as a void *.
+ */
+void *da_get_items(const da_array_t *array);
+
+/*!
+ * \brief Returns count of items in the array.
+ */
+unsigned da_get_count(const da_array_t *array);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* _KNOTD_COMMON_DYNAMIC_ARRAY_H_ */
+
+/*! @} */
diff --git a/src/common/errors.c b/src/common/errors.c
new file mode 100644
index 0000000..f1e650d
--- /dev/null
+++ b/src/common/errors.c
@@ -0,0 +1,74 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "common/errors.h"
+
+/*!
+ * \brief Looks up the given id in the lookup table.
+ *
+ * \param table Lookup table.
+ * \param id ID to look up.
+ *
+ * \return Item in the lookup table with the given id or NULL if no such is
+ *         present.
+ */
+static const error_table_t *error_lookup_by_id(const error_table_t *table,
+                                               int id)
+{
+	while (table->name != 0) {
+		if (table->id == id) {
+			return table;
+		}
+		table++;
+	}
+
+	return 0;
+}
+
+const char *error_to_str(const error_table_t *table, int code)
+{
+	const error_table_t *msg = error_lookup_by_id(table, code);
+	if (msg != 0) {
+		return msg->name;
+	} else {
+		return "Unknown error.";
+	}
+}
+
+int _map_errno(int fallback_value, int arg0, ...)
+{
+	/* Iterate all variable-length arguments. */
+	va_list ap;
+	va_start(ap, arg0);
+
+	/* KNOTD_ERROR serves as a sentinel. */
+	for (int c = arg0; c != 0; c = va_arg(ap, int)) {
+
+		/* Error code matches with mapped. */
+		if (c == errno) {
+			/* Return negative value of the code. */
+			return -abs(c);
+		}
+	}
+	va_end(ap);
+
+	/* Fallback error code. */
+	return fallback_value;
+}
diff --git a/src/common/errors.h b/src/common/errors.h
new file mode 100644
index 0000000..a2773ac
--- /dev/null
+++ b/src/common/errors.h
@@ -0,0 +1,80 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file errors.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Error codes and function for getting error message.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_ERROR_H_
+#define _KNOTD_COMMON_ERROR_H_
+
+#include <errno.h>
+
+/*! \brief Error lookup table. */
+typedef struct error_table_t {
+	int id;
+	const char *name;
+} error_table_t;
+
+/*!
+ * \brief Returns error message for the given error code.
+ *
+ * \param table Table of error messages to use.
+ * \param code Error code.
+ *
+ * \return String containing the error message.
+ */
+const char *error_to_str(const error_table_t *table, int code);
+
+/*!
+ * \brief Safe errno mapper that automatically appends sentinel value.
+ *
+ * \see _map_errno()
+ *
+ * \param fallback_value Fallback error value (used if the code could not be
+ *                       mapped.
+ * \param err POSIX errno.
+ * \param ... List of handled codes.
+ *
+ * \return Mapped error code.
+ */
+#define map_errno(fallback_value, err...) _map_errno(fallback_value, err, 0)
+
+/*!
+ * \brief Returns a mapped POSIX errcode.
+ *
+ * \warning Last error must be 0, it serves as a sentinel value.
+ *          Use map_errno() instead.
+ *
+ * \param fallback_value Fallback error value (used if the code could not be
+ *                       mapped.
+ * \param arg0 First mandatory argument.
+ * \param ... List of handled codes.
+ *
+ * \return Mapped error code.
+ */
+int _map_errno(int fallback_value, int arg0, ...);
+
+#endif /* _KNOTD_COMMON_ERROR_H_ */
+
+/*! @} */
diff --git a/src/common/evqueue.c b/src/common/evqueue.c
new file mode 100644
index 0000000..ca3027f
--- /dev/null
+++ b/src/common/evqueue.c
@@ -0,0 +1,130 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "common/evqueue.h"
+
+/*! \brief Singleton application-wide event queue. */
+evqueue_t *s_evqueue = 0;
+
+evqueue_t *evqueue_new()
+{
+	evqueue_t* q = malloc(sizeof(evqueue_t));
+
+	/* Initialize fds. */
+	if (pipe(q->fds) < 0) {
+		free(q);
+		q = 0;
+	}
+
+	return q;
+}
+
+void evqueue_free(evqueue_t **q)
+{
+	/* Check. */
+	if (!q) {
+		return;
+	}
+
+	/* Invalidate pointer to queue. */
+	evqueue_t *eq = *q;
+	*q = 0;
+
+	/* Deinitialize. */
+	close(eq->fds[EVQUEUE_READFD]);
+	close(eq->fds[EVQUEUE_WRITEFD]);
+	free(eq);
+}
+
+int evqueue_poll(evqueue_t *q, const struct timespec *ts,
+		 const sigset_t *sigmask)
+{
+	/* Check. */
+	if (!q) {
+		return -1;
+	}
+
+	/* Prepare fd set. */
+	fd_set rfds;
+	FD_ZERO(&rfds);
+	FD_SET(q->fds[EVQUEUE_READFD], &rfds);
+
+	/* Wait for events. */
+	int ret = pselect(q->fds[EVQUEUE_READFD] + 1, &rfds, 0, 0, ts, sigmask);
+	if (ret < 0) {
+		return -1;
+	}
+
+	return ret;
+}
+
+int evqueue_read(evqueue_t *q, void *dst, size_t len)
+{
+	if (!q || !dst || len == 0) {
+		return -1;
+	}
+
+	return read(q->fds[EVQUEUE_READFD], dst, len);
+}
+
+int evqueue_write(evqueue_t *q, const void *src, size_t len)
+{
+	if (!q || !src || len == 0) {
+		return -1;
+	}
+
+	return write(q->fds[EVQUEUE_WRITEFD], src, len);
+}
+
+int evqueue_get(evqueue_t *q, event_t *ev)
+{
+	/* Check. */
+	if (!q || !ev) {
+		return -1;
+	}
+
+	/* Read data. */
+	int ret = evqueue_read(q, ev, sizeof(event_t));
+	if (ret != sizeof(event_t)) {
+		return -1;
+	}
+
+	/* Set parent. */
+	ev->parent = q;
+
+	return 0;
+}
+
+int evqueue_add(evqueue_t *q, const event_t *ev)
+{
+	/* Check. */
+	if (!q || !ev) {
+		return -1;
+	}
+
+	/* Write data. */
+	int ret = evqueue_write(q, ev, sizeof(event_t));
+	if (ret != sizeof(event_t)) {
+		return -1;
+	}
+
+	return 0;
+}
+
diff --git a/src/common/evqueue.h b/src/common/evqueue.h
new file mode 100644
index 0000000..ffb3860
--- /dev/null
+++ b/src/common/evqueue.h
@@ -0,0 +1,200 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file evqueue.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Event queue.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_EVQUEUE_H_
+#define _KNOTD_COMMON_EVQUEUE_H_
+
+#include <pthread.h>
+#include <signal.h> // sigset_t
+#include <time.h>
+#include <sys/time.h>
+
+//#include "knot/common.h"
+#include "common/lists.h"
+
+struct event_t;
+
+/*!
+ * \brief Event callback.
+ *
+ * Pointer to whole event structure is passed to the callback.
+ * Callback should return 0 on success and negative integer on error.
+ *
+ * Example callback:
+ * \code
+ * int print_callback(event_t *t) {
+ *    return printf("Callback: %s\n", t->data);
+ * }
+ * \endcode
+ */
+typedef int (*event_cb_t)(struct event_t *);
+
+/*!
+ * \brief Event structure.
+ */
+typedef struct event_t {
+	node n;            /*!< Node for event queue. */
+	int type;          /*!< Event type. */
+	struct timeval tv; /*!< Event scheduled time. */
+	void *data;        /*!< Usable data ptr. */
+	event_cb_t cb;     /*!< Event callback. */
+	void *parent;      /*!< Pointer to parent (evqueue, scheduler...) */
+} event_t;
+
+/*!
+ * \brief Event queue constants.
+ */
+enum {
+	EVQUEUE_READFD  = 0,
+	EVQUEUE_WRITEFD = 1
+};
+
+/*!
+ * \brief Event queue structure.
+ */
+typedef struct {
+	int fds[2]; /*!< Read and Write fds. */
+} evqueue_t;
+
+/*!
+ * \brief Create new event queue.
+ *
+ * Event queue is thread-safe and POSIX signal-safe.
+ * It uses piped fds for queueing and pselect(2) to
+ * wait for events.
+ *
+ * \retval New instance on success.
+ * \retval NULL on error.
+ */
+evqueue_t *evqueue_new();
+
+/*!
+ * \brief Deinitialize and free event queue.
+ *
+ * \param q Pointer to queue instance.
+ * \note *q is set to 0.
+ */
+void evqueue_free(evqueue_t **q);
+
+/*!
+ * \brief Poll for new events.
+ *
+ * Unblocked signals during polling are specified
+ * in a sigmask.
+ *
+ * \param q Event queue.
+ * \param ts Timeout (or NULL for infinite).
+ * \param sigmask Bitmask of signals to receive (or NULL).
+ *
+ * \retval Number of polled events on success.
+ * \retval -1 On error or signal interrupt.
+ */
+int evqueue_poll(evqueue_t *q, const struct timespec *ts, const sigset_t *sigmask);
+
+/*!
+ * \brief Return evqueue pollable fd.
+ *
+ * \param q Event queue.
+ *
+ * \retval File descriptor available for polling.
+ * \retval -1 On error.
+ */
+static inline int evqueue_pollfd(evqueue_t *q) {
+	return q->fds[EVQUEUE_READFD];
+}
+
+/*!
+ * \brief Read data from event queue.
+ *
+ * This function is useful for sending custom
+ * events or other data types through the event queue.
+ *
+ * \param q Event queue.
+ * \param dst Destination buffer.
+ * \param len Number of bytes to read.
+ *
+ * \retval Number of read bytes on success.
+ * \retval -1 on error, \see read(2).
+ */
+int evqueue_read(evqueue_t *q, void *dst, size_t len);
+
+/*!
+ * \brief Write data to event queue.
+ *
+ * This function is useful for sending custom
+ * events or other data types through the event queue.
+ *
+ * \param q Event queue.
+ * \param src Source buffer.
+ * \param len Number of bytes to write.
+ *
+ * \retval Number of written bytes on success.
+ * \retval -1 on error, \see write(2).
+ */
+int evqueue_write(evqueue_t *q, const void *src, size_t len);
+
+/*!
+ * \brief Read event from event queue.
+ *
+ * \param q Event queue.
+ * \param ev Event structure for writing.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int evqueue_get(evqueue_t *q, event_t *ev);
+
+/*!
+ * \brief Add event to queue.
+ *
+ * \param q Event queue.
+ * \param ev Event structure to read.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int evqueue_add(evqueue_t *q, const event_t *ev);
+
+/* Singleton event queue pointer. */
+extern evqueue_t *s_evqueue;
+
+/*!
+ * \brief Event queue singleton.
+ */
+static inline evqueue_t *evqueue() {
+	return s_evqueue;
+}
+
+/*!
+ * \brief Set event queue singleton.
+ */
+static inline void evqueue_set(evqueue_t *q) {
+	s_evqueue = q;
+}
+
+#endif /* _KNOTD_COMMON_EVQUEUE_H_ */
+
+/*! @} */
diff --git a/src/common/evsched.c b/src/common/evsched.c
new file mode 100644
index 0000000..4e56028
--- /dev/null
+++ b/src/common/evsched.c
@@ -0,0 +1,309 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/time.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "common/evsched.h"
+
+/*!
+ * \brief Set event timer to T (now) + dt miliseconds.
+ */
+static void evsched_settimer(event_t *e, uint32_t dt)
+{
+	if (!e) {
+		return;
+	}
+
+	/* Get absolute time T. */
+	gettimeofday(&e->tv, 0);
+
+	/* Add number of seconds. */
+	e->tv.tv_sec += dt / 1000;
+
+	/* Add the number of microseconds. */
+	e->tv.tv_usec += (dt % 1000) * 1000;
+
+	/* Check for overflow. */
+	while (e->tv.tv_usec > 999999) {
+		e->tv.tv_sec += 1;
+		e->tv.tv_usec -= 1 * 1000 * 1000;
+	}
+}
+
+/*! \brief Singleton application-wide event scheduler. */
+evsched_t *s_evsched = 0;
+
+evsched_t *evsched_new()
+{
+	evsched_t *s = malloc(sizeof(evsched_t));
+	if (!s) {
+		return 0;
+	}
+
+	/* Initialize event calendar. */
+	pthread_mutex_init(&s->rl, 0);
+	pthread_mutex_init(&s->mx, 0);
+	pthread_cond_init(&s->notify, 0);
+	pthread_mutex_init(&s->cache.lock, 0);
+	slab_cache_init(&s->cache.alloc, sizeof(event_t));
+	init_list(&s->calendar);
+	return s;
+}
+
+void evsched_delete(evsched_t **s)
+{
+	if (!s) {
+		return;
+	}
+	if (!*s) {
+		return;
+	}
+
+	/* Deinitialize event calendar. */
+	pthread_mutex_destroy(&(*s)->rl);
+	pthread_mutex_destroy(&(*s)->mx);
+	pthread_cond_destroy(&(*s)->notify);
+	node *n = 0, *nxt = 0;
+	WALK_LIST_DELSAFE(n, nxt, (*s)->calendar) {
+		evsched_event_free((*s), (event_t*)n);
+	}
+
+	/* Free allocator. */
+	slab_cache_destroy(&(*s)->cache.alloc);
+	pthread_mutex_destroy(&(*s)->cache.lock);
+
+	/* Free scheduler. */
+	free(*s);
+	*s = 0;
+}
+
+event_t *evsched_event_new(evsched_t *s, int type)
+{
+	if (!s) {
+		return 0;
+	}
+
+	/* Allocate. */
+	pthread_mutex_lock(&s->cache.lock);
+	event_t *e = slab_cache_alloc(&s->cache.alloc);
+	pthread_mutex_unlock(&s->cache.lock);
+
+	/* Initialize. */
+	memset(e, 0, sizeof(event_t));
+	e->type = type;
+	return e;
+}
+
+void evsched_event_free(evsched_t *s, event_t *ev)
+{
+	if (!s || !ev) {
+		return;
+	}
+
+	pthread_mutex_lock(&s->cache.lock);
+	slab_free(ev);
+	pthread_mutex_unlock(&s->cache.lock);
+}
+
+event_t* evsched_next(evsched_t *s)
+{
+	/* Check. */
+	if (!s) {
+		return 0;
+	}
+
+	/* Lock calendar. */
+	pthread_mutex_lock(&s->mx);
+
+	while(1) {
+
+		/* Check event queue. */
+		if (!EMPTY_LIST(s->calendar)) {
+
+			/* Get current time. */
+			struct timeval dt;
+			gettimeofday(&dt, 0);
+
+			/* Get next event. */
+			event_t *next_ev = HEAD(s->calendar);
+
+			/* Immediately return. */
+			if (timercmp(&dt, &next_ev->tv, >=)) {
+				rem_node(&next_ev->n);
+				pthread_mutex_unlock(&s->mx);
+				pthread_mutex_lock(&s->rl);
+				s->current = next_ev;
+				return next_ev;
+			}
+
+			/* Wait for next event or interrupt. Unlock calendar. */
+			struct timespec ts;
+			ts.tv_sec = next_ev->tv.tv_sec;
+			ts.tv_nsec = next_ev->tv.tv_usec * 1000L;
+			pthread_cond_timedwait(&s->notify, &s->mx, &ts);
+		} else {
+			/* Block until an event is scheduled. Unlock calendar.*/
+			pthread_cond_wait(&s->notify, &s->mx);
+		}
+	}
+
+	/* Unlock calendar, this shouldn't happen. */
+	pthread_mutex_unlock(&s->mx);
+	return 0;
+
+}
+
+int evsched_event_finished(evsched_t *s)
+{
+	if (!s) {
+		return -1;
+	}
+
+	/* Mark as finished. */
+	if (s->current) {
+		s->current = 0;
+		pthread_mutex_unlock(&s->rl);
+		return 0;
+	}
+
+	/* Finished event is not current. */
+	return -1;
+}
+
+int evsched_schedule(evsched_t *s, event_t *ev, uint32_t dt)
+{
+	if (!s || !ev || dt < 0) {
+		return -1;
+	}
+
+	/* Update event timer. */
+	evsched_settimer(ev, dt);
+
+	/* Lock calendar. */
+	pthread_mutex_lock(&s->mx);
+
+	/* Schedule event. */
+	node *n = 0, *prev = 0;
+	if (!EMPTY_LIST(s->calendar)) {
+		WALK_LIST(n, s->calendar) {
+			event_t* cur = (event_t *)n;
+			if (timercmp(&cur->tv, &ev->tv, <)) {
+				prev = n;
+			} else {
+				break;
+			}
+		}
+	}
+
+	/* Append to list. */
+	ev->parent = s;
+	if (prev) {
+		insert_node(&ev->n, prev);
+	} else {
+		add_head(&s->calendar, &ev->n);
+	}
+
+
+	/* Unlock calendar. */
+	pthread_cond_signal(&s->notify);
+	pthread_mutex_unlock(&s->mx);
+
+	return 0;
+}
+
+event_t* evsched_schedule_cb(evsched_t *s, event_cb_t cb, void *data, uint32_t dt)
+{
+	if (!s) {
+		return 0;
+	}
+
+	/* Create event. */
+	event_t *e = evsched_event_new(s, EVSCHED_CB);
+	if (!e) {
+		return 0;
+	}
+	e->cb = cb;
+	e->data = data;
+
+	/* Schedule. */
+	if (evsched_schedule(s, e, dt) != 0) {
+		evsched_event_free(s, e);
+		e = 0;
+	}
+
+	return e;
+}
+
+event_t* evsched_schedule_term(evsched_t *s, uint32_t dt)
+{
+	if (!s) {
+		return 0;
+	}
+
+	/* Create event. */
+	event_t *e = evsched_event_new(s, EVSCHED_TERM);
+	if (!e) {
+		return 0;
+	}
+
+	/* Schedule. */
+	if (evsched_schedule(s, e, dt) != 0) {
+		evsched_event_free(s, e);
+		e = 0;
+	}
+
+	return e;
+}
+
+int evsched_cancel(evsched_t *s, event_t *ev)
+{
+	if (!s || !ev) {
+		return -1;
+	}
+
+	/* Lock calendar. */
+	pthread_mutex_lock(&s->mx);
+
+	/* Make sure not running. */
+	pthread_mutex_lock(&s->rl);
+
+	/* Find in list. */
+	event_t *n = 0;
+	int found = 0;
+	WALK_LIST(n, s->calendar) {
+		if (n == ev) {
+			found = 1;
+			break;
+		}
+	}
+
+	/* Remove from list. */
+	if (found) {
+		rem_node(&ev->n);
+	}
+
+	/* Enable running events. */
+	pthread_mutex_unlock(&s->rl);
+
+	/* Unlock calendar. */
+	pthread_cond_signal(&s->notify);
+	pthread_mutex_unlock(&s->mx);
+
+	return 0;
+}
+
diff --git a/src/common/evsched.h b/src/common/evsched.h
new file mode 100644
index 0000000..2a682e1
--- /dev/null
+++ b/src/common/evsched.h
@@ -0,0 +1,240 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file evsched.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Event scheduler.
+ *
+ * Scheduler works with the same event_t type as event queue.
+ * It is also thread-safe so the scheduler can run in a separate thread
+ * while events can be enqueued from different threads.
+ *
+ * Guideline is, that the scheduler run loop should exit with
+ * a special event type EVSCHED_TERM.
+ *
+ * Example usage:
+ * \code
+ * evsched_t *s = evsched_new();
+ *
+ * // Schedule myfunc() after 1000ms
+ * evsched_schedule_cb(s, myfunc, data, 1000)
+ *
+ * // Schedule termination event after 1500ms
+ * evsched_schedule_term(s, 1500);
+ *
+ * // Event scheduler main loop
+ * while (1) {
+ *    // Wait for next scheduled event
+ *    event_t *ev = evsched_next();
+ *
+ *    // Break on termination event
+ *    if (ev->type == EVSCHED_TERM) {
+ *       evsched_event_free(s, ev);
+ *       break;
+ *    }
+ *
+ *    // Execute and discard event
+ *    if (ev->cb) {
+ *       ev->cb(ev);
+ *    }
+ *    evsched_event_free(s, ev); // Free executed event
+ * }
+ *
+ * // Delete event scheduler
+ * evsched_delete(s);
+ * \endcode
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_EVSCHED_H_
+#define _KNOTD_COMMON_EVSCHED_H_
+
+#include <pthread.h>
+#include "common/slab/slab.h"
+#include "common/lists.h"
+#include "common/evqueue.h"
+
+/*!
+ * \brief Scheduler event types.
+ */
+typedef enum evsched_ev_t {
+	EVSCHED_NOOP = 0,   /*!< No-op action, skip. */
+	EVSCHED_CB,         /*!< Callback action. */
+	EVSCHED_TERM        /*!< Terminal action, stop event scheduler. */
+} evsched_ev_t;
+
+/*!
+ * \brief Event scheduler structure.
+ *
+ * Keeps list of scheduled events. Events are executed in their scheduled
+ * time and kept in an ordered list (queue).
+ * Scheduler is terminated with a special EVSCHED_TERM event type.
+ */
+typedef struct {
+	pthread_mutex_t rl;      /*!< Event running lock. */
+	event_t *current;        /*!< Current running event. */
+	pthread_mutex_t mx;      /*!< Event queue locking. */
+	pthread_cond_t notify;   /*!< Event queue notification. */
+	list calendar;           /*!< Event calendar. */
+	struct {
+		slab_cache_t alloc;   /*!< Events SLAB cache. */
+		pthread_mutex_t lock; /*!< Events cache spin lock. */
+	} cache;
+} evsched_t;
+
+/*!
+ * \brief Create new event scheduler instance.
+ *
+ * \retval New instance on success.
+ * \retval NULL on error.
+ */
+evsched_t *evsched_new();
+
+/*!
+ * \brief Deinitialize and free event scheduler instance.
+ *
+ * \param s Pointer to event scheduler instance.
+ * \note *sched is set to 0.
+ */
+void evsched_delete(evsched_t **s);
+
+/*!
+ * \brief Create an empty event.
+ *
+ * \param s Pointer to event scheduler instance.
+ * \param type Event type.
+ * \retval New instance on success.
+ * \retval NULL on error.
+ */
+event_t *evsched_event_new(evsched_t *s, int type);
+
+/*!
+ * \brief Dispose event instance.
+ *
+ * \param s Pointer to event scheduler instance.
+ * \param ev Event instance.
+ */
+void evsched_event_free(evsched_t *s, event_t *ev);
+
+/*!
+ * \brief Fetch next-event.
+ *
+ * Scheduler may block until a next event is available.
+ * Send scheduler an EVSCHED_NOOP or EVSCHED_TERM event to unblock it.
+ *
+ * \warning Returned event must be marked as finished, or deadlock occurs.
+ *
+ * \param s Event scheduler.
+ *
+ * \retval Scheduled event.
+ * \retval NULL on error.
+ */
+event_t* evsched_next(evsched_t *s);
+
+/*!
+ * \brief Mark running event as finished.
+ *
+ * Need to call this after each event returned by evsched_next() is finished.
+ *
+ * \param s Event scheduler.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int evsched_event_finished(evsched_t *s);
+
+/*!
+ * \brief Schedule an event.
+ *
+ * \param s Event scheduler.
+ * \param ev Prepared event.
+ * \param dt Time difference in milliseconds from now (dt is relative).
+ *
+ * \retval 0 on success.
+ * \retval <0 on error.
+ */
+int evsched_schedule(evsched_t *s, event_t *ev, uint32_t dt);
+
+/*!
+ * \brief Schedule callback event.
+ *
+ * Execute callback after dt miliseconds has passed.
+ *
+ * \param s Event scheduler.
+ * \param cb Callback handler.
+ * \param data Data for callback.
+ * \param dt Time difference in milliseconds from now (dt is relative).
+ *
+ * \retval Event instance on success.
+ * \retval NULL on error.
+ */
+event_t* evsched_schedule_cb(evsched_t *s, event_cb_t cb, void *data, uint32_t dt);
+
+/*!
+ * \brief Schedule termination event.
+ *
+ * Special action for scheduler termination.
+ *
+ * \param s Event scheduler.
+ * \param dt Time difference in milliseconds from now (dt is relative).
+ *
+ * \retval Event instance on success.
+ * \retval NULL on error.
+ */
+event_t* evsched_schedule_term(evsched_t *s, uint32_t dt);
+
+/*!
+ * \brief Cancel a scheduled event.
+ *
+ * \warning May block until current running event is finished (as it cannot
+ *          interrupt running event).
+ *
+ * \warning Never cancel event in it's callback. As it never finishes,
+ *          it deadlocks.
+ *
+ * \param s Event scheduler.
+ * \param ev Scheduled event.
+ *
+ * \retval 0 on success.
+ * \retval <0 on error.
+ */
+int evsched_cancel(evsched_t *s, event_t *ev);
+
+/* Singleton event scheduler pointer. */
+extern evsched_t *s_evsched;
+
+/*!
+ * \brief Event scheduler singleton.
+ */
+static inline evsched_t *evsched() {
+	return s_evsched;
+}
+
+/*!
+ * \brief Set event scheduler singleton.
+ */
+static inline void evsched_set(evsched_t *s) {
+	s_evsched = s;
+}
+
+
+#endif /* _KNOTD_COMMON_EVSCHED_H_ */
+
+/*! @} */
diff --git a/src/common/fdset.c b/src/common/fdset.c
new file mode 100644
index 0000000..8c070ad
--- /dev/null
+++ b/src/common/fdset.c
@@ -0,0 +1,80 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE /* Required for RTLD_DEFAULT. */
+#endif
+
+#include <dlfcn.h>
+#include <string.h>
+#include <stdio.h>
+#include "common/fdset.h"
+#include <config.h>
+
+struct fdset_backend_t _fdset_backend = {
+};
+
+/*! \brief Set backend implementation. */
+static void fdset_set_backend(struct fdset_backend_t *backend) {
+	memcpy(&_fdset_backend, backend, sizeof(struct fdset_backend_t));
+}
+
+/* Linux epoll API. */
+#ifdef HAVE_EPOLL_WAIT
+  #include "common/fdset_epoll.h"
+#endif /* HAVE_EPOLL_WAIT */
+
+/* BSD kqueue API */
+#ifdef HAVE_KQUEUE
+  #include "common/fdset_kqueue.h"
+#endif /* HAVE_KQUEUE */
+
+/* POSIX poll API */
+#ifdef HAVE_POLL
+  #include "common/fdset_poll.h"
+#endif /* HAVE_POLL */
+
+/*! \brief Bootstrap polling subsystem (it is called automatically). */
+void __attribute__ ((constructor)) fdset_init()
+{
+	/* Preference: epoll */
+#ifdef HAVE_EPOLL_WAIT
+	if (dlsym(RTLD_DEFAULT, "epoll_wait") != 0) {
+		fdset_set_backend(&FDSET_EPOLL);
+		return;
+	}
+#endif
+
+	/* Preference: kqueue */
+#ifdef HAVE_KQUEUE
+	if (dlsym(RTLD_DEFAULT, "kqueue") != 0) {
+		fdset_set_backend(&FDSET_KQUEUE);
+		return;
+	}
+#endif
+
+	/* Fallback: poll */
+#ifdef HAVE_POLL
+	if (dlsym(RTLD_DEFAULT, "poll") != 0) {
+		fdset_set_backend(&FDSET_POLL);
+		return;
+	}
+#endif
+
+	/* This shouldn't happen. */
+	fprintf(stderr, "fdset: fatal error - no valid fdset backend found\n");
+	return;
+}
diff --git a/src/common/fdset.h b/src/common/fdset.h
new file mode 100644
index 0000000..10196bf
--- /dev/null
+++ b/src/common/fdset.h
@@ -0,0 +1,196 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file fdset.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Wrapper for native I/O multiplexing.
+ *
+ * Selects best implementation according to config.
+ * - select()
+ * - poll() \todo
+ * - epoll()
+ * - kqueue()
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_FDSET_H_
+#define _KNOTD_FDSET_H_
+
+#include <stddef.h>
+
+/*! \brief Opaque pointer to implementation-specific fdset data. */
+typedef struct fdset_t fdset_t;
+
+/*! \brief Unified event types. */
+enum fdset_event_t {
+	OS_EV_READ  = 1 << 0, /*!< Readable event. */
+	OS_EV_WRITE = 1 << 1, /*!< Writeable event. */
+	OS_EV_ERROR = 1 << 2  /*!< Error event. */
+};
+
+/*! \brief File descriptor set iterator. */
+typedef struct fdset_it_t {
+	int fd;     /*!< Current file descriptor. */
+	int events; /*!< Returned events. */
+	size_t pos; /* Internal usage. */
+} fdset_it_t;
+
+/*!
+ * \brief File descriptor set implementation backend.
+ * \notice Functions documentation following.
+ * \internal
+ */
+struct fdset_backend_t
+{
+	fdset_t* (*fdset_new)();
+	int (*fdset_destroy)(fdset_t*);
+	int (*fdset_add)(fdset_t*, int, int);
+	int (*fdset_remove)(fdset_t*, int);
+	int (*fdset_wait)(fdset_t*);
+	int (*fdset_begin)(fdset_t*, fdset_it_t*);
+	int (*fdset_end)(fdset_t*, fdset_it_t*);
+	int (*fdset_next)(fdset_t*, fdset_it_t*);
+	const char* (*fdset_method)();
+};
+
+/*!
+ * \brief Selected backend.
+ * \internal
+ */
+extern struct fdset_backend_t _fdset_backend;
+
+/*!
+ * \brief Create new fdset.
+ *
+ * FDSET implementation depends on system.
+ *
+ * \retval Pointer to initialized FDSET structure if successful.
+ * \retval NULL on error.
+ */
+static inline fdset_t *fdset_new() {
+	return _fdset_backend.fdset_new();
+}
+
+/*!
+ * \brief Destroy FDSET.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on error.
+ */
+static inline int fdset_destroy(fdset_t * fdset) {
+	return _fdset_backend.fdset_destroy(fdset);
+}
+
+/*!
+ * \brief Add file descriptor to watched set.
+ *
+ * \param fdset Target set.
+ * \param fd Added file descriptor.
+ * \param events Mask of watched events.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+static inline int fdset_add(fdset_t *fdset, int fd, int events) {
+	return _fdset_backend.fdset_add(fdset, fd, events);
+}
+
+
+/*!
+ * \brief Remove file descriptor from watched set.
+ *
+ * \param fdset Target set.
+ * \param fd File descriptor to be removed.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+static inline int fdset_remove(fdset_t *fdset, int fd) {
+	return _fdset_backend.fdset_remove(fdset, fd);
+}
+
+/*!
+ * \brief Poll set for new events.
+ *
+ * \param fdset Target set.
+ *
+ * \retval Number of events if successful.
+ * \retval -1 on errors.
+ *
+ * \todo Timeout.
+ */
+static inline int fdset_wait(fdset_t *fdset) {
+	return _fdset_backend.fdset_wait(fdset);
+}
+
+/*!
+ * \brief Set event iterator to the beginning of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+static inline int fdset_begin(fdset_t *fdset, fdset_it_t *it) {
+	return _fdset_backend.fdset_begin(fdset, it);
+}
+
+/*!
+ * \brief Set event iterator to the end of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+static inline int fdset_end(fdset_t *fdset, fdset_it_t *it) {
+	return _fdset_backend.fdset_end(fdset, it);
+}
+
+/*!
+ * \brief Set event iterator to the next event.
+ *
+ * Event iterator fd will be set to -1 if next event doesn't exist.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+static inline int fdset_next(fdset_t *fdset, fdset_it_t *it) {
+	return _fdset_backend.fdset_next(fdset, it);
+}
+
+/*!
+ * \brief Returned name of underlying poll method.
+ *
+ * \retval Name if successful.
+ * \retval NULL if no method was loaded (shouldn't happen).
+ */
+static inline const char* fdset_method() {
+	return _fdset_backend.fdset_method();
+}
+
+#endif /* _KNOTD_FDSET_H_ */
+
+/*! @} */
diff --git a/src/common/fdset_epoll.c b/src/common/fdset_epoll.c
new file mode 100644
index 0000000..cb2e3e1
--- /dev/null
+++ b/src/common/fdset_epoll.c
@@ -0,0 +1,216 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_EPOLL_WAIT
+
+#include <sys/epoll.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "fdset_epoll.h"
+
+#define OS_FDS_CHUNKSIZE 8   /*!< Number of pollfd structs in a chunk. */
+#define OS_FDS_KEEPCHUNKS 32 /*!< Will attempt to free memory when reached. */
+
+struct fdset_t {
+	int epfd;
+	struct epoll_event *events;
+	size_t nfds;
+	size_t reserved;
+	size_t polled;
+};
+
+fdset_t *fdset_epoll_new()
+{
+	fdset_t *set = malloc(sizeof(fdset_t));
+	if (!set) {
+		return 0;
+	}
+
+	/* Blank memory. */
+	memset(set, 0, sizeof(fdset_t));
+
+	/* Create epoll fd. */
+	set->epfd = epoll_create(OS_FDS_CHUNKSIZE);
+
+	return set;
+}
+
+int fdset_epoll_destroy(fdset_t * fdset)
+{
+	if(!fdset) {
+		return -1;
+	}
+
+	/* Teardown epoll. */
+	close(fdset->epfd);
+
+	/* OK if NULL. */
+	free(fdset->events);
+	free(fdset);
+	return 0;
+}
+
+int fdset_epoll_add(fdset_t *fdset, int fd, int events)
+{
+	if (!fdset || fd < 0 || events <= 0) {
+		return -1;
+	}
+
+	/* Realloc needed. */
+	if (fdset->nfds == fdset->reserved) {
+		const size_t chunk = OS_FDS_CHUNKSIZE;
+		const size_t nsize = (fdset->reserved + chunk) *
+				     sizeof(struct epoll_event);
+		struct epoll_event *events_n = malloc(nsize);
+		if (!events_n) {
+			return -1;
+		}
+
+		/* Clear and copy old fdset data. */
+		memset(events_n, 0, nsize);
+		memcpy(events_n, fdset->events,
+		       fdset->nfds * sizeof(struct epoll_event));
+		free(fdset->events);
+		fdset->events = events_n;
+		fdset->reserved += chunk;
+	}
+
+	/* Add to epoll set. */
+	struct epoll_event ev;
+	memset(&ev, 0, sizeof(struct epoll_event));
+	ev.events = EPOLLIN; /*! \todo MAP events. */
+	ev.data.fd = fd;
+	if (epoll_ctl(fdset->epfd, EPOLL_CTL_ADD, fd, &ev) < 0) {
+		return -1;
+	}
+
+	++fdset->nfds;
+	return 0;
+}
+
+int fdset_epoll_remove(fdset_t *fdset, int fd)
+{
+	if (!fdset || fd < 0) {
+		return -1;
+	}
+
+	/* Attempt to remove from set. */
+	struct epoll_event ev;
+	memset(&ev, 0, sizeof(struct epoll_event));
+	if (epoll_ctl(fdset->epfd, EPOLL_CTL_DEL, fd, &ev) < 0) {
+		return -1;
+	}
+
+	/* Overwrite current item. */
+	--fdset->nfds;
+
+	/*! \todo Return memory if overallocated (nfds is far lower than reserved). */
+	return 0;
+}
+
+int fdset_epoll_wait(fdset_t *fdset)
+{
+	if (!fdset || fdset->nfds < 1 || !fdset->events) {
+		return -1;
+	}
+
+	/* Poll new events. */
+	fdset->polled = 0;
+	int nfds = epoll_wait(fdset->epfd, fdset->events, fdset->nfds, -1);
+
+	/* Check. */
+	if (nfds < 0) {
+		return -1;
+	}
+
+	/* Events array is ordered from 0 to nfds. */
+	fdset->polled = nfds;
+	return nfds;
+}
+
+int fdset_epoll_begin(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it) {
+		return -1;
+	}
+
+	/* Find first. */
+	it->pos = 0;
+	return fdset_next(fdset, it);
+}
+
+int fdset_epoll_end(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Check for polled events. */
+	if (fdset->polled < 1) {
+		it->fd = -1;
+		it->pos = 0;
+		return -1;
+	}
+
+	/* No end found, ends on the beginning. */
+	size_t nid = fdset->polled - 1;
+	it->fd = fdset->events[nid].data.fd;
+	it->pos = nid;
+	it->events = 0; /*! \todo Map events. */
+	return -1;
+}
+
+int fdset_epoll_next(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Check boundaries. */
+	if (it->pos >= fdset->polled) {
+		return -1;
+	}
+
+	/* Select next. */
+	size_t nid = it->pos++;
+	it->fd = fdset->events[nid].data.fd;
+	it->events = 0; /*! \todo Map events. */
+	return 0;
+}
+
+const char* fdset_epoll_method()
+{
+	return "epoll";
+}
+
+/* Package APIs. */
+struct fdset_backend_t FDSET_EPOLL = {
+	.fdset_new = fdset_epoll_new,
+	.fdset_destroy = fdset_epoll_destroy,
+	.fdset_add = fdset_epoll_add,
+	.fdset_remove = fdset_epoll_remove,
+	.fdset_wait = fdset_epoll_wait,
+	.fdset_begin = fdset_epoll_begin,
+	.fdset_end = fdset_epoll_end,
+	.fdset_next = fdset_epoll_next,
+	.fdset_method = fdset_epoll_method
+};
+
+#endif
diff --git a/src/common/fdset_epoll.h b/src/common/fdset_epoll.h
new file mode 100644
index 0000000..551394d
--- /dev/null
+++ b/src/common/fdset_epoll.h
@@ -0,0 +1,133 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file fdset_epoll.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Wrapper for epoll I/O multiplexing.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_FDSET_EPOLL_H_
+#define _KNOTD_FDSET_EPOLL_H_
+
+#include "fdset.h"
+
+/*!
+ * \brief Create new fdset.
+ *
+ * Linux epoll() backend.
+ *
+ * \retval Pointer to initialized FDSET structure if successful.
+ * \retval NULL on error.
+ */
+fdset_t *fdset_epoll_new();
+
+/*!
+ * \brief Destroy FDSET.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on error.
+ */
+int fdset_epoll_destroy(fdset_t * fdset);
+
+/*!
+ * \brief Add file descriptor to watched set.
+ *
+ * \param fdset Target set.
+ * \param fd Added file descriptor.
+ * \param events Mask of watched events.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_epoll_add(fdset_t *fdset, int fd, int events);
+
+/*!
+ * \brief Remove file descriptor from watched set.
+ *
+ * \param fdset Target set.
+ * \param fd File descriptor to be removed.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_epoll_remove(fdset_t *fdset, int fd);
+
+/*!
+ * \brief Poll set for new events.
+ *
+ * \param fdset Target set.
+ *
+ * \retval Number of events if successful.
+ * \retval -1 on errors.
+ *
+ * \todo Timeout.
+ */
+int fdset_epoll_wait(fdset_t *fdset);
+
+/*!
+ * \brief Set event iterator to the beginning of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_epoll_begin(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the end of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_epoll_end(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the next event.
+ *
+ * Event iterator fd will be set to -1 if next event doesn't exist.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_epoll_next(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Returned name of epoll method.
+ *
+ * \retval Name if successful.
+ * \retval NULL if no method was loaded (shouldn't happen).
+ */
+const char* fdset_epoll_method();
+
+/*! \brief Exported API. */
+extern struct fdset_backend_t FDSET_EPOLL;
+
+#endif /* _KNOTD_FDSET_EPOLL_H_ */
+
+/*! @} */
diff --git a/src/common/fdset_kqueue.c b/src/common/fdset_kqueue.c
new file mode 100644
index 0000000..c7199ae
--- /dev/null
+++ b/src/common/fdset_kqueue.c
@@ -0,0 +1,251 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_KQUEUE
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/event.h>
+#include <sys/time.h>
+
+#include "fdset_kqueue.h"
+
+#define OS_FDS_CHUNKSIZE 8   /*!< Number of pollfd structs in a chunk. */
+#define OS_FDS_KEEPCHUNKS 32 /*!< Will attempt to free memory when reached. */
+
+struct fdset_t {
+	int kq;
+	struct kevent *events;
+	struct kevent *revents;
+	size_t nfds;
+	size_t reserved;
+	size_t polled;
+};
+
+fdset_t *fdset_kqueue_new()
+{
+	fdset_t *set = malloc(sizeof(fdset_t));
+	if (!set) {
+		return 0;
+	}
+
+	/* Blank memory. */
+	memset(set, 0, sizeof(fdset_t));
+
+	/* Create kqueue fd. */
+	set->kq = kqueue();
+	if (set->kq < 0) {
+		free(set);
+		set = 0;
+	}
+
+	return set;
+}
+
+int fdset_kqueue_destroy(fdset_t * fdset)
+{
+	if(!fdset) {
+		return -1;
+	}
+
+	/* Teardown kqueue. */
+	close(fdset->kq);
+
+	/* OK if NULL. */
+	free(fdset->revents);
+	free(fdset->events);
+	free(fdset);
+	return 0;
+}
+
+int fdset_kqueue_realloc(void **old, size_t oldsize, size_t nsize)
+{
+	void *nmem = malloc(nsize);
+	if (!nmem) {
+		return -1;
+	}
+
+	/* Clear and copy old fdset data. */
+	memset(nmem, 0, nsize);
+	if (oldsize > 0) {
+		memcpy(nmem, *old, oldsize);
+		free(*old);
+	}
+	
+	*old = nmem;
+	return 0;
+}
+
+int fdset_kqueue_add(fdset_t *fdset, int fd, int events)
+{
+	if (!fdset || fd < 0 || events <= 0) {
+		return -1;
+	}
+
+	/* Realloc needed. */
+	if (fdset->nfds == fdset->reserved) {
+		const size_t chunk = OS_FDS_CHUNKSIZE;
+		const size_t nsize = (fdset->reserved + chunk) *
+				     sizeof(struct kevent);
+		const size_t oldsize = fdset->nfds * sizeof(struct kevent);
+		
+		if (fdset_kqueue_realloc(&fdset->events, oldsize, nsize) < 0) {
+			return -1;
+		}
+		
+		if (fdset_kqueue_realloc(&fdset->revents, oldsize, nsize) < 0) {
+			return -1;
+		}
+
+	}
+
+	/* Add to kqueue set. */
+	int evfilt = EVFILT_READ; /*! \todo Map events. */
+	EV_SET(&fdset->events[fdset->nfds], fd, evfilt,
+	       EV_ADD|EV_ENABLE, 0, 0, 0);
+
+	++fdset->nfds;
+	return 0;
+}
+
+int fdset_kqueue_remove(fdset_t *fdset, int fd)
+{
+	if (!fdset || fd < 0) {
+		return -1;
+	}
+	
+	/* Find in set. */
+	int pos = -1;
+	for (int i = 0; i < fdset->nfds; ++i) {
+		if (fdset->events[i].ident == fd) {
+			pos = i;
+			break;
+		}
+	}
+	
+	if (pos < 0) {
+		return -1;
+	}
+	
+	/* Remove filters. */
+	EV_SET(&fdset->events[pos], fd, EVFILT_READ,
+	       EV_DISABLE|EV_DELETE, 0, 0, 0);
+
+	/* Attempt to remove from set. */
+	size_t remaining = ((fdset->nfds - pos) - 1) * sizeof(struct kevent);
+	memmove(fdset->events + pos, fdset->events + (pos + 1), remaining);
+	
+	/* Overwrite current item. */
+	--fdset->nfds;
+
+	/*! \todo Return memory if overallocated (nfds is far lower than reserved). */
+	return 0;
+}
+
+int fdset_kqueue_wait(fdset_t *fdset)
+{
+	if (!fdset || fdset->nfds < 1 || !fdset->events) {
+		return -1;
+	}
+
+	/* Poll new events. */
+	fdset->polled = 0;
+	int nfds = kevent(fdset->kq, fdset->events, fdset->nfds,
+	                  fdset->revents, fdset->nfds, 0);
+
+	/* Check. */
+	if (nfds < 0) {
+		return -1;
+	}
+
+	/* Events array is ordered from 0 to nfds. */
+	fdset->polled = nfds;
+	return nfds;
+}
+
+int fdset_kqueue_begin(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it) {
+		return -1;
+	}
+
+	/* Find first. */
+	it->pos = 0;
+	return fdset_next(fdset, it);
+}
+
+int fdset_kqueue_end(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Check for polled events. */
+	if (fdset->polled < 1) {
+		it->fd = -1;
+		it->pos = 0;
+		return -1;
+	}
+
+	/* No end found, ends on the beginning. */
+	size_t nid = fdset->polled - 1;
+	it->fd = fdset->revents[nid].ident;
+	it->pos = nid;
+	it->events = 0; /*! \todo Map events. */
+	return -1;
+}
+
+int fdset_kqueue_next(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Check boundaries. */
+	if (it->pos >= fdset->polled) {
+		return -1;
+	}
+
+	/* Select next. */
+	size_t nid = it->pos++;
+	it->fd = fdset->revents[nid].ident;
+	it->events = 0; /*! \todo Map events. */
+	return 0;
+}
+
+const char* fdset_kqueue_method()
+{
+	return "kqueue";
+}
+
+/* Package APIs. */
+struct fdset_backend_t FDSET_KQUEUE = {
+	.fdset_new = fdset_kqueue_new,
+	.fdset_destroy = fdset_kqueue_destroy,
+	.fdset_add = fdset_kqueue_add,
+	.fdset_remove = fdset_kqueue_remove,
+	.fdset_wait = fdset_kqueue_wait,
+	.fdset_begin = fdset_kqueue_begin,
+	.fdset_end = fdset_kqueue_end,
+	.fdset_next = fdset_kqueue_next,
+	.fdset_method = fdset_kqueue_method
+};
+
+#endif
diff --git a/src/common/fdset_kqueue.h b/src/common/fdset_kqueue.h
new file mode 100644
index 0000000..f64482f
--- /dev/null
+++ b/src/common/fdset_kqueue.h
@@ -0,0 +1,133 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file fdset_kqueue.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Wrapper for kqueue I/O multiplexing.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_FDSET_KQUEUE_H_
+#define _KNOTD_FDSET_KQUEUE_H_
+
+#include "fdset.h"
+
+/*!
+ * \brief Create new fdset.
+ *
+ * BSD kqueue() backend.
+ *
+ * \retval Pointer to initialized FDSET structure if successful.
+ * \retval NULL on error.
+ */
+fdset_t *fdset_kqueue_new();
+
+/*!
+ * \brief Destroy FDSET.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on error.
+ */
+int fdset_kqueue_destroy(fdset_t * fdset);
+
+/*!
+ * \brief Add file descriptor to watched set.
+ *
+ * \param fdset Target set.
+ * \param fd Added file descriptor.
+ * \param events Mask of watched events.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_kqueue_add(fdset_t *fdset, int fd, int events);
+
+/*!
+ * \brief Remove file descriptor from watched set.
+ *
+ * \param fdset Target set.
+ * \param fd File descriptor to be removed.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_kqueue_remove(fdset_t *fdset, int fd);
+
+/*!
+ * \brief Poll set for new events.
+ *
+ * \param fdset Target set.
+ *
+ * \retval Number of events if successful.
+ * \retval -1 on errors.
+ *
+ * \todo Timeout.
+ */
+int fdset_kqueue_wait(fdset_t *fdset);
+
+/*!
+ * \brief Set event iterator to the beginning of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_kqueue_begin(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the end of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_kqueue_end(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the next event.
+ *
+ * Event iterator fd will be set to -1 if next event doesn't exist.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_kqueue_next(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Returned name of kqueue method.
+ *
+ * \retval Name if successful.
+ * \retval NULL if no method was loaded (shouldn't happen).
+ */
+const char* fdset_kqueue_method();
+
+/*! \brief Exported API. */
+extern struct fdset_backend_t FDSET_KQUEUE;
+
+#endif /* _KNOTD_FDSET_KQUEUE_H_ */
+
+/*! @} */
diff --git a/src/common/fdset_poll.c b/src/common/fdset_poll.c
new file mode 100644
index 0000000..8682eaf
--- /dev/null
+++ b/src/common/fdset_poll.c
@@ -0,0 +1,230 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_POLL
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <stddef.h>
+
+#include "common/fdset_poll.h"
+
+#define OS_FDS_CHUNKSIZE 8   /*!< Number of pollfd structs in a chunk. */
+#define OS_FDS_KEEPCHUNKS 32 /*!< Will attempt to free memory when reached. */
+
+struct fdset_t {
+	struct pollfd *fds;
+	nfds_t nfds;
+	size_t reserved;
+	size_t polled;
+	size_t begin;
+};
+
+fdset_t *fdset_poll_new()
+{
+	fdset_t *set = malloc(sizeof(fdset_t));
+	if (!set) {
+		return 0;
+	}
+
+	/* Blank memory. */
+	memset(set, 0, sizeof(fdset_t));
+	return set;
+}
+
+int fdset_poll_destroy(fdset_t * fdset)
+{
+	if(!fdset) {
+		return -1;
+	}
+
+	/*! \todo No teardown required I guess. */
+
+	/* OK if NULL. */
+	free(fdset->fds);
+	free(fdset);
+	return 0;
+}
+
+int fdset_poll_add(fdset_t *fdset, int fd, int events)
+{
+	if (!fdset || fd < 0 || events <= 0) {
+		return -1;
+	}
+
+	/* Realloc needed. */
+	if (fdset->nfds == fdset->reserved) {
+		const size_t chunk = OS_FDS_CHUNKSIZE;
+		const size_t nsize = sizeof(struct pollfd) * (fdset->reserved + chunk);
+		struct pollfd *fds_n = malloc(nsize);
+		if (!fds_n) {
+			return -1;
+		}
+
+		/* Clear and copy old fdset data. */
+		memset(fds_n, 0, nsize);
+		memcpy(fds_n, fdset->fds, fdset->nfds * sizeof(struct pollfd));
+		free(fdset->fds);
+		fdset->fds = fds_n;
+		fdset->reserved += chunk;
+	}
+
+	/* Append. */
+	int nid = fdset->nfds++;
+	fdset->fds[nid].fd = fd;
+	fdset->fds[nid].events = POLLIN; /*! \todo Map events to POLL events. */
+	return 0;
+}
+
+int fdset_poll_remove(fdset_t *fdset, int fd)
+{
+	if (!fdset || fd < 0) {
+		return -1;
+	}
+
+	/* Find file descriptor. */
+	unsigned found = 0;
+	size_t pos = 0;
+	for (size_t i = 0; i < fdset->nfds; ++i) {
+		if (fdset->fds[i].fd == fd) {
+			found = 1;
+			pos = i;
+			break;
+		}
+	}
+
+	/* Check. */
+	if (!found) {
+		return -1;
+	}
+
+	/* Overwrite current item. */
+	size_t remaining = ((fdset->nfds - pos) - 1) * sizeof(struct pollfd);
+	memmove(fdset->fds + pos, fdset->fds + (pos + 1), remaining);
+	--fdset->nfds;
+
+	/*! \todo Return memory if overallocated (nfds is far lower than reserved). */
+	/*! \todo Maybe >64 free chunks is excess? */
+	return 0;
+}
+
+int fdset_poll_wait(fdset_t *fdset)
+{
+	if (!fdset || fdset->nfds < 1 || !fdset->fds) {
+		return -1;
+	}
+
+	/* Initialize pointers. */
+	fdset->polled = 0;
+	fdset->begin = 0;
+
+	/* Poll for events. */
+	int ret = poll(fdset->fds, fdset->nfds, -1);
+	if (ret < 0) {
+		return -1;
+	}
+
+	/* Set pointers for iterating. */
+	fdset->polled = ret;
+	fdset->begin = 0;
+	return ret;
+}
+
+int fdset_poll_begin(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it) {
+		return -1;
+	}
+
+	/* Find first. */
+	it->pos = 0;
+	return fdset_next(fdset, it);
+}
+
+int fdset_poll_end(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Check for polled events. */
+	if (fdset->polled < 1) {
+		it->fd = -1;
+		it->pos = 0;
+		return -1;
+	}
+
+	/* Trace last matching item from the end. */
+	struct pollfd* pfd = fdset->fds + fdset->nfds - 1;
+	while (pfd != fdset->fds) {
+		if (pfd->events & pfd->revents) {
+			it->fd = pfd->fd;
+			it->pos = pfd - fdset->fds;
+			return 0;
+		}
+	}
+
+	/* No end found, ends on the beginning. */
+	it->fd = -1;
+	it->pos = 0;
+	return -1;
+}
+
+int fdset_poll_next(fdset_t *fdset, fdset_it_t *it)
+{
+	if (!fdset || !it || fdset->nfds < 1) {
+		return -1;
+	}
+
+	/* Find next with matching flags. */
+	for (; it->pos < fdset->nfds; ++it->pos) {
+		struct pollfd* pfd = fdset->fds + it->pos;
+		if (pfd->events & pfd->revents) {
+			it->fd = pfd->fd;
+			it->events = pfd->revents; /*! \todo MAP events. */
+			++it->pos; /* Next will start after current. */
+			return 0;
+		}
+	}
+
+	/* No matching event found. */
+	it->fd = -1;
+	it->pos = 0;
+	return -1;
+}
+
+const char* fdset_poll_method()
+{
+	return "poll";
+}
+
+/* Package APIs. */
+struct fdset_backend_t FDSET_POLL = {
+	.fdset_new = fdset_poll_new,
+	.fdset_destroy = fdset_poll_destroy,
+	.fdset_add = fdset_poll_add,
+	.fdset_remove = fdset_poll_remove,
+	.fdset_wait = fdset_poll_wait,
+	.fdset_begin = fdset_poll_begin,
+	.fdset_end = fdset_poll_end,
+	.fdset_next = fdset_poll_next,
+	.fdset_method = fdset_poll_method
+};
+
+#endif
diff --git a/src/common/fdset_poll.h b/src/common/fdset_poll.h
new file mode 100644
index 0000000..d72b5bb
--- /dev/null
+++ b/src/common/fdset_poll.h
@@ -0,0 +1,133 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file fdset_poll.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Wrapper for poll I/O multiplexing.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_FDSET_POLL_H_
+#define _KNOTD_FDSET_POLL_H_
+
+#include "fdset.h"
+
+/*!
+ * \brief Create new fdset.
+ *
+ * POSIX poll() backend.
+ *
+ * \retval Pointer to initialized FDSET structure if successful.
+ * \retval NULL on error.
+ */
+fdset_t *fdset_poll_new();
+
+/*!
+ * \brief Destroy FDSET.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on error.
+ */
+int fdset_poll_destroy(fdset_t * fdset);
+
+/*!
+ * \brief Add file descriptor to watched set.
+ *
+ * \param fdset Target set.
+ * \param fd Added file descriptor.
+ * \param events Mask of watched events.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_poll_add(fdset_t *fdset, int fd, int events);
+
+/*!
+ * \brief Remove file descriptor from watched set.
+ *
+ * \param fdset Target set.
+ * \param fd File descriptor to be removed.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_poll_remove(fdset_t *fdset, int fd);
+
+/*!
+ * \brief Poll set for new events.
+ *
+ * \param fdset Target set.
+ *
+ * \retval Number of events if successful.
+ * \retval -1 on errors.
+ *
+ * \todo Timeout.
+ */
+int fdset_poll_wait(fdset_t *fdset);
+
+/*!
+ * \brief Set event iterator to the beginning of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_poll_begin(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the end of last polled events.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_poll_end(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Set event iterator to the next event.
+ *
+ * Event iterator fd will be set to -1 if next event doesn't exist.
+ *
+ * \param fdset Target set.
+ * \param it Event iterator.
+ *
+ * \retval 0 if successful.
+ * \retval -1 on errors.
+ */
+int fdset_poll_next(fdset_t *fdset, fdset_it_t *it);
+
+/*!
+ * \brief Returned name of poll method.
+ *
+ * \retval Name if successful.
+ * \retval NULL if no method was loaded (shouldn't happen).
+ */
+const char* fdset_poll_method();
+
+/*! \brief Exported API. */
+extern struct fdset_backend_t FDSET_POLL;
+
+#endif /* _KNOTD_FDSET_POLL_H_ */
+
+/*! @} */
diff --git a/src/common/general-tree.c b/src/common/general-tree.c
new file mode 100644
index 0000000..202b31a
--- /dev/null
+++ b/src/common/general-tree.c
@@ -0,0 +1,215 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "common/general-tree.h"
+#include "common/errors.h"
+
+MOD_TREE_DEFINE(general_tree_node, avl);
+
+static void gen_rem_func(struct general_tree_node *n1)
+{
+	free(n1);
+}
+
+general_tree_t *gen_tree_new(int (*comp_func)(void *, void *))
+{
+	general_tree_t *ret = malloc(sizeof(general_tree_t));
+	if (ret == NULL) {
+		return NULL;
+	}
+	ret->tree = malloc(sizeof(general_avl_tree_t));
+	if (ret->tree == NULL) {
+		free(ret);
+		return NULL;
+	}
+	MOD_TREE_INIT(ret->tree, comp_func);
+	return ret;
+}
+
+int gen_tree_add(general_tree_t *tree,
+                 void *node, int (*mrg_func)(void **n1, void **n2))
+{
+	struct general_tree_node *tree_node =
+		malloc(sizeof(struct general_tree_node));
+	if (tree_node == NULL) {
+		return -1;
+	}
+	memset(tree_node, 0, sizeof(struct general_tree_node));
+	tree_node->data = node;
+	int merged = 0;
+	MOD_TREE_INSERT(tree->tree, general_tree_node, avl,
+	                tree_node, mrg_func, &merged);
+	if (merged) {
+		free(tree_node);
+	}
+	return merged;
+}
+
+void gen_tree_remove(general_tree_t *tree,
+                     void *what)
+{
+	struct general_tree_node tree_node;
+	tree_node.data = what;
+	MOD_TREE_REMOVE(tree->tree, general_tree_node, avl, &tree_node,
+	                gen_rem_func);
+}
+
+void *gen_tree_find(general_tree_t *tree,
+                    void *what)
+{
+	struct general_tree_node tree_node;
+	tree_node.data = what;
+	struct general_tree_node *found_node =
+		MOD_TREE_FIND(tree->tree, general_tree_node, avl, &tree_node);
+	if (found_node) {
+		return found_node->data;
+	} else {
+		return NULL;
+	}
+}
+
+int gen_tree_find_less_or_equal(general_tree_t *tree,
+                                void *what,
+                                void **found)
+{
+	if (tree == NULL || tree->tree == NULL) {
+		return -1;
+	}
+
+	/* Check if tree is empty. */
+	if (tree->tree->th_root == NULL) {
+		*found = NULL;
+		return 0;
+	}
+
+	struct general_tree_node *f = NULL, *prev = NULL;
+	struct general_tree_node tree_node;
+	tree_node.data = what;
+	int exact_match =
+		MOD_TREE_FIND_LESS_EQUAL(tree->tree, general_tree_node, avl,
+	                                 &tree_node, &f, &prev);
+	if (exact_match < 0) {
+		*found = NULL;
+		exact_match = 0;
+	} else if (exact_match == 0) {
+		assert(prev != NULL);
+		*found = prev->data;
+	} else {
+		assert(f != NULL);
+		*found = f->data;
+	}
+//	*found = (exact_match > 0) ? f->data : prev->data;
+	return exact_match;
+}
+
+void gen_tree_apply_inorder(general_tree_t *tree,
+                            void (*app_func)
+                            (void *node, void *data), void *data)
+{
+	MOD_TREE_FORWARD_APPLY(tree->tree, general_tree_node, avl,
+	                   app_func, data);
+}
+
+void gen_tree_destroy(general_tree_t **tree,
+                      void (*dest_func)(void *node, void *data), void *data)
+{
+//	gen_tree_apply_inorder(*tree, print_node, NULL);
+	MOD_TREE_DESTROY((*tree)->tree, general_tree_node, avl, dest_func,
+	                 gen_rem_func, data);
+	free((*tree)->tree);
+	free(*tree);
+	*tree = NULL;
+}
+
+void gen_tree_clear(general_tree_t *tree)
+{
+	MOD_TREE_DESTROY(tree->tree, general_tree_node, avl, NULL,
+	                 gen_rem_func, NULL);
+}
+
+//static void add_node_to_tree(void *n, void *data)
+//{
+//	general_tree_t *tree = (general_tree_t *)data;
+//	gen_tree_add(tree, n, NULL);
+//}
+
+static int gen_tree_copy_node(const struct general_tree_node *from,
+                              struct general_tree_node **to)
+{
+	if (from == NULL) {
+		return 0;
+	}
+
+	*to = malloc(sizeof(struct general_tree_node));
+	if (*to == NULL) {
+	       return -1;
+	}
+	memset(*to, 0, sizeof(struct general_tree_node));
+
+	(*to)->data = from->data;
+	(*to)->avl.avl_height = from->avl.avl_height;
+
+	int ret = gen_tree_copy_node(from->avl.avl_left,
+	                             &(*to)->avl.avl_left);
+	if (ret != 0) {
+		return ret;
+	}
+
+	ret = gen_tree_copy_node(from->avl.avl_right,
+	                         &(*to)->avl.avl_right);
+	if (ret != 0) {
+		/*! \todo Partially cleaunp tree! */
+	       (*to)->avl.avl_left = NULL;
+	       return ret;
+	}
+
+	return 0;
+}
+
+general_tree_t *gen_tree_shallow_copy(general_tree_t *tree)
+{
+	general_tree_t *new_tree = malloc(sizeof(general_tree_t));
+	if (new_tree == NULL) {
+		return NULL;
+	}
+	new_tree->tree = malloc(sizeof(general_avl_tree_t));
+	if (new_tree->tree == NULL) {
+		free(new_tree);
+		return NULL;
+	}
+
+	MOD_TREE_INIT(new_tree->tree, tree->tree->th_cmp);
+	assert(new_tree->tree->th_cmp == tree->tree->th_cmp);
+
+//	gen_tree_apply_inorder(tree, add_node_to_tree, new_tree);
+
+	if (gen_tree_copy_node(tree->tree->th_root,
+	                       &new_tree->tree->th_root) != 0) {
+		return NULL;
+	}
+
+	/* CLEANUP */
+//	gen_tree_apply_inorder(tree, print_node, NULL);
+//	printf("--------------------------\n");
+//	gen_tree_apply_inorder(new_tree, print_node, NULL);
+
+	return new_tree;
+}
+
diff --git a/src/common/general-tree.h b/src/common/general-tree.h
new file mode 100644
index 0000000..552638a
--- /dev/null
+++ b/src/common/general-tree.h
@@ -0,0 +1,73 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_COMMON_GENERAL_TREE_H_
+#define _KNOTD_COMMON_GENERAL_TREE_H_
+
+#include "common/modified_tree.h"
+
+typedef MOD_TREE_HEAD(tree, general_tree_node) general_avl_tree_t;
+
+/* Define tree with void * nodes */
+struct general_tree_node {
+	MOD_TREE_ENTRY(general_tree_node) avl;
+//	int (*cmp_func)(void *n1,
+//	                void *n2);
+//	int (*mrg_func)(void **n1,
+//	                void **n2);
+//	void (*app_func)(void *n,
+//	                 void *data);
+	void *data;
+};
+
+struct general_tree {
+//	int (*cmp_func)(void *n1,
+//	                void *n2);
+//	int (*mrg_func)(void **n1,
+//	                void **n2);
+	general_avl_tree_t *tree;
+};
+
+typedef struct general_tree general_tree_t;
+
+general_tree_t *gen_tree_new(int (*cmp_func)(void *p1, void *p2));
+
+int gen_tree_add(general_tree_t *tree,
+                 void *node,
+                 int (*mrg_func)(void **n1, void **n2));
+
+void *gen_tree_find(general_tree_t *tree,
+                    void *what);
+
+void gen_tree_remove(general_tree_t *tree,
+                      void *what);
+
+void gen_tree_apply_inorder(general_tree_t *tree,
+                            void (*app_func)(void *node, void *data),
+                            void *data);
+
+void gen_tree_destroy(general_tree_t **tree,
+                      void (*dest_func)(void *node, void *data), void *data);
+
+void gen_tree_clear(general_tree_t *tree);
+
+int gen_tree_find_less_or_equal(general_tree_t *tree,
+                                void *what,
+                                void **found);
+
+general_tree_t *gen_tree_shallow_copy(general_tree_t *tree);
+
+#endif // _KNOTD_COMMON_GENERAL_TREE_H_
diff --git a/src/common/latency.c b/src/common/latency.c
new file mode 100644
index 0000000..a563f58
--- /dev/null
+++ b/src/common/latency.c
@@ -0,0 +1,197 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef PROF_LATENCY
+
+#include <sys/resource.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <pthread.h>
+
+
+/*! \brief Profiler statistics. */
+typedef struct pstat_t {
+	double M;               /*!< \brief Mean value. */
+	unsigned long min, max; /*!< \brief Minimum, maximum. */
+	unsigned long total;    /*!< \brief Total profiled time. */
+	unsigned long count;    /*!< \brief Number of profiled calls. */
+} pstat_t;
+
+/*! \brief Function call profile. */
+typedef struct profile_t {
+	const char* call;
+	pstat_t stat;
+} profile_t;
+
+/*! \brief Observed function call codes. */
+enum pcall_code_t {
+	PF_RECVFROM = 0,
+	PF_SENDTO,
+	PF_PTHREAD_MUTEX_LOCK,
+	PF_PTHREAD_MUTEX_UNLOCK,
+	PF_CALL_SIZE
+} pcall_code_t;
+
+/*! \brief Table of observed function calls. */
+static profile_t table[] = {
+	{ "recvfrom",             {0} },
+	{ "sendto",               {0} },
+	{ "pthread_mutex_lock",   {0} },
+	{ "pthread_mutex_unlock", {0} },
+	{ "NULL",                 {0} }
+};
+
+
+/*! \brief Add value to statistics. */
+static inline void add_stat(pstat_t *stat, unsigned long val) {
+
+	if (val < stat->min) {
+		stat->min = val;
+	}
+	if (val > stat->max) {
+		stat->max = val;
+	}
+
+	stat->total += val;
+
+	double Mprev = stat->M, M = stat->M;
+	M += (val - M)/((double)stat->count + 1);
+	stat->M = M;
+	//S += (val - M)*(x[i] - Mprev);
+
+	++stat->count;
+}
+
+/*! \brief Call profiler table initialization (automatically called on load). */
+void __attribute__ ((constructor)) profiler_init()
+{
+	for (int i = 0; i < PF_CALL_SIZE; ++i) {
+		pstat_t* stat = &table[i].stat;
+		stat->M = 0;
+		stat->max = 0;
+		stat->min = (unsigned long)~0;
+		stat->total = 0;
+		stat->count = 0;
+	}
+}
+
+/*! \brief Call profiler table evaluation (automatically called on exit). */
+void __attribute__ ((destructor)) profiler_deinit()
+{
+
+	/* Get resource usage. */
+	struct rusage usage;
+	if (getrusage(RUSAGE_SELF, &usage) < 0) {
+		memset(&usage, 0, sizeof(struct rusage));
+	}
+
+	fprintf(stderr, "\nStatistics:");
+	fprintf(stderr, "\n==================\n");
+
+	fprintf(stderr, "User time: %.03lf ms\nSystem time: %.03lf ms\n",
+		usage.ru_utime.tv_sec * (double) 1000.0
+		+ usage.ru_utime.tv_usec / (double)1000.0,
+		usage.ru_stime.tv_sec * (double) 1000.0
+		+ usage.ru_stime.tv_usec / (double)1000.0);
+	fprintf(stderr, "Voluntary context switches: %lu\nInvoluntary context switches: %lu\n",
+		usage.ru_nvcsw,
+		usage.ru_nivcsw);
+	fprintf(stderr, "==================\n");
+	fprintf(stderr, "\n");
+
+	/* Callers statistics. */
+	for (int i = 0; i < PF_CALL_SIZE; ++i) {
+		pstat_t* stat = &table[i].stat;
+		fprintf(stderr, "%s: M=%lf min=%lu,max=%lu (total=%lu, %lu times) (usec)\n",
+			table[i].call, stat->M, stat->min, stat->max, stat->total,
+			stat->count);
+	}
+
+}
+
+ssize_t pf_recvfrom(int socket, void *buf, size_t len, int flags,
+		    struct sockaddr *from, socklen_t *fromlen,
+		    const char* caller, const char* file, int line)
+{
+	unsigned long elapsed = 0;
+	int ret = 0;
+	perf_begin();
+	ret = recvfrom(socket, buf, len, flags, from, fromlen);
+	perf_end(elapsed);
+
+	/* Discard wakeup delays, count statistics otherwise. */
+	if (elapsed < 200000) {
+		add_stat(&table[PF_RECVFROM].stat, elapsed);
+	}
+	return ret;
+}
+
+ssize_t pf_sendto(int socket, const void *buf, size_t len, int flags,
+		  const struct sockaddr *to, socklen_t tolen,
+		  const char* caller, const char* file, int line)
+{
+	unsigned long elapsed = 0;
+	int ret = 0;
+	perf_begin();
+	ret = sendto(socket, buf, len, flags, to, tolen);
+	perf_end(elapsed);
+
+	/* Discard wakeup delays, count statistics otherwise. */
+	if (elapsed < 200000) {
+		add_stat(&table[PF_SENDTO].stat, elapsed);
+	}
+	return ret;
+}
+
+/* Pthreads */
+int pf_pthread_mutex_lock(pthread_mutex_t *mutex,
+			  const char* caller, const char* file, int line)
+{
+	unsigned long elapsed = 0;
+	int ret = 0;
+	perf_begin();
+	ret = pthread_mutex_lock(mutex);
+	perf_end(elapsed);
+
+	/* Discard wakeup delays, count statistics otherwise. */
+	if (elapsed < 200000) {
+		add_stat(&table[PF_PTHREAD_MUTEX_LOCK].stat, elapsed);
+	}
+
+	return ret;
+}
+
+int pf_pthread_mutex_unlock(pthread_mutex_t *mutex,
+			    const char* caller, const char* file, int line)
+{
+	unsigned long elapsed = 0;
+	int ret = 0;
+	perf_begin();
+	ret = pthread_mutex_unlock(mutex);
+	perf_end(elapsed);
+
+	/* Discard wakeup delays, count statistics otherwise. */
+	if (elapsed < 200000) {
+		add_stat(&table[PF_PTHREAD_MUTEX_UNLOCK].stat, elapsed);
+	}
+
+	return ret;
+}
+
+#endif // PROF_LATENCY
diff --git a/src/common/latency.h b/src/common/latency.h
new file mode 100644
index 0000000..d965c56
--- /dev/null
+++ b/src/common/latency.h
@@ -0,0 +1,115 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file latency.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Utilities for latency profiling.
+ *
+ * Selected calls latency profiler is enabled with PROF_LATENCY define.
+ * You can roughly profile own code with perf_begin() and perf_end() macros.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_LATENCY_H_
+#define _KNOTD_COMMON_LATENCY_H_
+
+/* Optional. */
+#ifdef PROF_LATENCY
+
+/* Do not include from latency.c */
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <pthread.h>
+
+/* Profiler tools */
+
+/*! \brief Time profile begin macro. */
+#define perf_begin() \
+do { \
+	struct timeval __begin; \
+	gettimeofday(&__begin, 0)
+
+/*! \brief Time profile end macro
+ *  \param d Will contain the number of microseconds passed from perf_begin().
+ */
+#define perf_end(d) \
+	struct timeval __end; \
+	gettimeofday(&__end, 0); \
+	unsigned long __us = (__end.tv_sec - __begin.tv_sec) * 1000L * 1000L; \
+	__us += (__end.tv_usec - __begin.tv_usec); \
+	(d) = __us; \
+} while(0)
+
+/* Prototypes. */
+
+/*! \brief Profiled recvfrom(). */
+ssize_t pf_recvfrom(int socket, void *buf, size_t len, int flags,
+		    struct sockaddr *from, socklen_t *fromlen,
+		    const char* caller, const char* file, int line);
+
+/*! \brief Profiled sendto(). */
+ssize_t pf_sendto(int socket, const void *buf, size_t len, int flags,
+		  const struct sockaddr *to, socklen_t tolen,
+		  const char* caller, const char* file, int line);
+
+/*! \brief Profiled pthread_mutex_lock(). */
+int pf_pthread_mutex_lock(pthread_mutex_t *mutex,
+			  const char* caller, const char* file, int line);
+
+/*! \brief Profiled pthread_mutex_unlock(). */
+int pf_pthread_mutex_unlock(pthread_mutex_t *mutex,
+			    const char* caller, const char* file, int line);
+
+/*
+ * Sockets.
+ */
+
+/*! \brief Rerouted recvfrom(). */
+#define recvfrom(s, buf, len, flags, from, fromlen) \
+	pf_recvfrom((s), (buf), (len), (flags), (from), (fromlen), \
+		    __FUNCTION__, __FILE__, __LINE__)
+
+/*! \brief Rerouted sendto(). */
+#define sendto(s, buf, len, flags, to, tolen) \
+	pf_sendto((s), (buf), (len), (flags), (to), (tolen), \
+		  __FUNCTION__, __FILE__, __LINE__)
+
+/*
+ * Pthreads.
+ */
+
+/*! \brief Rerouted pthread_mutex_lock(). */
+#define pthread_mutex_lock(m) \
+	pf_pthread_mutex_lock(m, __FUNCTION__, __FILE__, __LINE__)
+
+/*! \brief Rerouted pthread_mutex_unlock(). */
+#define pthread_mutex_unlock(m) \
+	pf_pthread_mutex_unlock(m, __FUNCTION__, __FILE__, __LINE__)
+
+#else // PROF_LATENCY
+
+/* Profiler tools */
+#define perf_begin()
+#define perf_end(d)
+
+#endif // PROF_LATENCY
+#endif // _KNOTD_COMMON_LATENCY_H_
+
+/*! @} */
diff --git a/src/common/libtap/README b/src/common/libtap/README
new file mode 100644
index 0000000..d57b81d
--- /dev/null
+++ b/src/common/libtap/README
@@ -0,0 +1,231 @@
+NAME
+====
+
+libtap - Write tests in C
+
+SYNOPSIS
+========
+
+    #include <tap.h>
+    
+    int   foo () {return 3;}
+    char *bar () {return "fnord";}
+
+    int main () {
+        plan(5);
+        ok(foo() == 3);
+        is(bar(), "eek");
+        ok(foo() <= 8732, "foo <= %d", 8732);
+        like(bar(), "f(yes|no)r*[a-f]$", "is like");
+        cmp_ok(foo(), ">=", 10, "foo is greater than ten");
+        return exit_status();
+    }
+
+results in:
+
+    1..5
+    ok 1
+    not ok 2
+    #   Failed test at synopsis.c line 9.
+    #          got: 'fnord'
+    #     expected: 'eek'
+    ok 3 - foo <= 8732
+    ok 4 - is like
+    not ok 5 - foo is greater than ten
+    #   Failed test 'foo is greater than ten'
+    #   at synopsis.c line 12.
+    #     3
+    #         >=
+    #     10
+    # Looks like you failed 2 tests of 5 run.
+
+DESCRIPTION
+===========
+
+tap is an easy to read and easy to write way of creating tests for your
+software. This library creates functions that can be used to generate it for
+your C programs. It is mostly based on the Test::More Perl module.
+
+FUNCTIONS
+=========
+
+-   plan(tests)
+-   plan(NO_PLAN)
+    
+    Use this to start a series of tests. When you know how many tests there 
+    will be, you can put a number as a number of tests you expect to run. If 
+    you do not know how many tests there will be, you can use plan(NO_PLAN)
+    or not call this function. When you pass it a number of tests to run, a
+    message similar to the following will appear in the output:
+    
+        1..5
+
+-   ok(test)
+-   ok(test, fmt, ...)
+
+    Specify a test. the test can be any statement returning a true or false
+    value. You may optionally pass a format string describing the test.
+    
+        ok(r = reader_new("Of Mice and Men"), "create a new reader");
+        ok(reader_go_to_page(r, 55), "can turn the page");
+        ok(r->page == 55, "page turned to the right one");
+    
+    Should print out:
+    
+        ok 1 - create a new reader
+        ok 2 - can turn the page
+        ok 3 - page turned to the right one
+    
+    On failure, a diagnostic message will be printed out.
+
+        not ok 3 - page turned to the right one
+        #   Failed test 'page turned to the right one'
+        #   at reader.c line 13.
+
+-   is(got, expected)
+-   is(got, expected, fmt, ...)
+-   isnt(got, expected)
+-   isnt(got, expected, fmt, ...)
+
+    Tests that the string you got is what you expected. with isnt, it is the
+    reverse.
+    
+        is("this", "that", "this is that");
+
+    prints:
+    
+        not ok 1 - this is that
+        #   Failed test 'this is that'
+        #   at is.c line 6.
+        #          got: 'this'
+        #     expected: 'that'
+
+-   cmp_ok(a, op, b)
+-   cmp_ok(a, op, b, fmt, ...)
+
+    Compares two ints with any binary operator that doesn't require an lvalue.
+    This is nice to use since it provides a better error message than an
+    equivalent ok.
+    
+        cmp_ok(420, ">", 666);
+    
+    prints:
+    
+        not ok 1
+        #   Failed test at cmpok.c line 5.
+        #     420
+        #         >
+        #     666
+
+-   like(got, expected)
+-   like(got, expected, fmt, ...)
+-   unlike(got, expected)
+-   unlike(got, expected, fmt, ...)
+
+    Tests that the string you got matches the expected extended POSIX regex.
+    unlike is the reverse. These macros are the equivalent of a skip on
+    Windows.
+    
+        like("stranger", "^s.(r).*\\1$", "matches the regex");
+        
+    prints:
+    
+        ok 1 - matches the regex
+
+-   pass()
+-   pass(fmt, ...)
+-   fail()
+-   fail(fmt, ...)
+
+    Speciy that a test succeeded or failed. Use these when the statement is
+    longer than you can fit into the argument given to an ok() test.
+
+-   dies_ok(code)
+-   dies_ok(code, fmt, ...)
+-   lives_ok(code)
+-   lives_ok(code, fmt, ...)
+
+    Tests whether the given code causes your program to exit. The code gets
+    passed to a macro that will test it in a forked process. If the code
+    succeeds it will be executed in the parent process. You can test things 
+    like passing a function a null pointer and make sure it doesnt 
+    dereference it and crash.
+    
+        dies_ok({abort();}, "abort does close your program");
+        dies_ok({int x = 0/0;}, "divide by zero crash");
+        lives ok({pow(3.0, 5.0)}, "nothing wrong with taking 3**5");
+    
+    On Windows, these macros are the equivalent of a skip.
+
+-   exit_status()
+
+    Summarizes the tests that occurred. If there was no plan, it will print
+    out the number of tests as.
+    
+        1..5
+    
+    It will also print a diagnostic message about how many
+    failures there were.
+    
+        # Looks like you failed 2 tests of 3 run.
+    
+    If all planned tests were successful, it will return 0. If any test fails,
+    it will return the number of failed tests (including ones that were
+    missing). If they all passed, but there were missing tests, it will return
+    255.
+
+-   note(fmt, ...)
+-   diag(fmt, ...)
+
+    print out a message to the tap output. note prints to stdout and diag
+    prints to stderr. Each line is preceeded by a "# " so that you know its a 
+    diagnostic message.
+    
+        note("This is\na note\nto describe\nsomething.");
+    
+    prints:
+    
+        # This is
+        # a note
+        # to describe
+        # something
+    
+    ok() and these functions return ints so you can use them like:
+    
+        ok(1) && note("yo!");
+        ok(0) || diag("I have no idea what just happened");
+
+-   skip(test, n)
+-   skip(test, n, fmt, ...)
+-   endskip
+
+    Skip a series of n tests if test is true. You may give a reason why you are
+    skipping them or not. The (possibly) skipped tests must occur between the
+    skip and endskip macros.
+    
+        skip(TRUE, 2);
+        ok(1);
+        ok(0);
+        endskip;
+
+    prints:
+    
+        ok 1 # skip
+        ok 2 # skip
+
+-   todo()
+-   todo(fmt, ...)
+-   endtodo
+
+    Specifies a series of tests that you expect to fail because they are not
+    yet implemented.
+
+        todo()
+        ok(0);
+        endtodo;
+    
+    prints:
+    
+        not ok 1 # TODO
+        #   Failed (TODO) test at todo.c line 7
+
diff --git a/src/common/libtap/tap.c b/src/common/libtap/tap.c
new file mode 100644
index 0000000..61e0528
--- /dev/null
+++ b/src/common/libtap/tap.c
@@ -0,0 +1,313 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+//#include "common.h"
+#include "tap.h"
+
+static int expected_tests = NO_PLAN;
+static int failed_tests;
+static int current_test;
+static char *todo_mesg;
+
+void
+plan (int tests) {
+    expected_tests = tests;
+    if (tests != NO_PLAN)
+        printf("1..%d\n", tests);
+}
+
+static char *
+vstrdupf (const char *fmt, va_list args) {
+    char *str;
+    int size;
+    va_list args2;
+    va_copy(args2, args);
+    if (!fmt)
+        fmt = "";
+    size = vsnprintf(NULL, 0, fmt, args2) + 2;
+    str = malloc(size);
+    vsprintf(str, fmt, args);
+    va_end(args2);
+    return str;
+}
+
+int
+vok_at_loc (const char *file, int line, int test, const char *fmt,
+            va_list args)
+{
+    char *name = vstrdupf(fmt, args);
+    printf("%sok %d", test ? "" : "not ", ++current_test);
+    if (*name)
+        printf(" - %s", name);
+    if (todo_mesg) {
+        printf(" # TODO");
+        if (*todo_mesg)
+            printf(" %s", todo_mesg);
+    }
+    printf("\n");
+    if (!test) {
+        if (*name)
+            diag("  Failed%s test '%s'\n  at %s line %d.",
+                todo_mesg ? " (TODO)" : "", name, file, line);
+        else
+            diag("  Failed%s test at %s line %d.",
+                todo_mesg ? " (TODO)" : "", file, line);
+        if (!todo_mesg)
+            failed_tests++;
+    }
+    free(name);
+    return test;
+}
+
+int
+ok_at_loc (const char *file, int line, int test, const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    vok_at_loc(file, line, test, fmt, args);
+    va_end(args);
+    return test;
+}
+
+static int
+mystrcmp (const char *a, const char *b) {
+    return a == b ? 0 : !a ? -1 : !b ? 1 : strcmp(a, b);
+}
+
+#define eq(a, b) (!mystrcmp(a, b))
+#define ne(a, b) (mystrcmp(a, b))
+
+int
+is_at_loc (const char *file, int line, const char *got, const char *expected,
+           const char *fmt, ...)
+{
+    int test = eq(got, expected);
+    va_list args;
+    va_start(args, fmt);
+    vok_at_loc(file, line, test, fmt, args);
+    va_end(args);
+    if (!test) {
+        diag("         got: '%s'", got);
+        diag("    expected: '%s'", expected);
+    }
+    return test;
+}
+
+int
+isnt_at_loc (const char *file, int line, const char *got, const char *expected,
+             const char *fmt, ...)
+{
+    int test = ne(got, expected);
+    va_list args;
+    va_start(args, fmt);
+    vok_at_loc(file, line, test, fmt, args);
+    va_end(args);
+    if (!test) {
+        diag("         got: '%s'", got);
+        diag("    expected: anything else");
+    }
+    return test;
+}
+
+int
+cmp_ok_at_loc (const char *file, int line, int a, const char *op, int b,
+               const char *fmt, ...)
+{
+    int test = eq(op, "||") ? a || b
+             : eq(op, "&&") ? a && b
+             : eq(op, "|")  ? a |  b
+             : eq(op, "^")  ? a ^  b
+             : eq(op, "&")  ? a &  b
+             : eq(op, "==") ? a == b
+             : eq(op, "!=") ? a != b
+             : eq(op, "<")  ? a <  b
+             : eq(op, ">")  ? a >  b
+             : eq(op, "<=") ? a <= b
+             : eq(op, ">=") ? a >= b
+             : eq(op, "<<") ? a << b
+             : eq(op, ">>") ? a >> b
+             : eq(op, "+")  ? a +  b
+             : eq(op, "-")  ? a -  b
+             : eq(op, "*")  ? a *  b
+             : eq(op, "/")  ? a /  b
+             : eq(op, "%")  ? a %  b
+             : diag("unrecognized operator '%s'", op);
+    va_list args;
+    va_start(args, fmt);
+    vok_at_loc(file, line, test, fmt, args);
+    va_end(args);
+    if (!test) {
+        diag("    %d", a);
+        diag("        %s", op);
+        diag("    %d", b);
+    }
+    return test;
+}
+
+static void
+vdiag_to_fh (FILE *fh, const char *fmt, va_list args) {
+    char *mesg, *line;
+    int i;
+    if (!fmt)
+        return;
+    mesg = vstrdupf(fmt, args);
+    line = mesg;
+    for (i = 0; *line; i++) {
+        char c = mesg[i];
+        if (!c || c == '\n') {
+            mesg[i] = '\0';
+            fprintf(fh, "# %s\n", line);
+            if (!c) break;
+            mesg[i] = c;
+            line = &mesg[i+1];
+        }
+    }
+    free(mesg);
+    return;
+}
+
+int
+diag (const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    vdiag_to_fh(stderr, fmt, args);
+    va_end(args);
+    return 0;
+}
+
+int
+note (const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    vdiag_to_fh(stdout, fmt, args);
+    va_end(args);
+    return 0;
+}
+
+int
+exit_status () {
+    int retval = 0;
+    if (expected_tests == NO_PLAN) {
+        printf("1..%d\n", current_test);
+    }
+    else if (current_test != expected_tests) {
+        diag("Looks like you planned %d test%s but ran %d.",
+            expected_tests, expected_tests > 1 ? "s" : "", current_test);
+        retval = 255;
+    }
+    if (failed_tests) {
+        diag("Looks like you failed %d test%s of %d run.",
+            failed_tests, failed_tests > 1 ? "s" : "", current_test);
+        if (expected_tests == NO_PLAN)
+            retval = failed_tests;
+        else
+            retval = expected_tests - current_test + failed_tests;
+    }
+    return retval;
+}
+
+void
+skippy (int n, const char *fmt, ...) {
+    char *why;
+    va_list args;
+    va_start(args, fmt);
+    why = vstrdupf(fmt, args);
+    va_end(args);
+    while (n --> 0) {
+        printf("ok %d ", ++current_test);
+        note("skip %s\n", why);
+    }
+    free(why);
+}
+
+void
+ctodo (int ignore, const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    todo_mesg = vstrdupf(fmt, args);
+    va_end(args);
+}
+
+void
+cendtodo () {
+    free(todo_mesg);
+    todo_mesg = NULL;
+}
+
+#ifndef _WIN32
+#include <sys/mman.h>
+#include <regex.h>
+
+#ifndef MAP_ANONYMOUS 
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
+/* Create a shared memory int to keep track of whether a piece of code executed
+dies. to be used in the dies_ok and lives_ok macros  */
+int
+tap_test_died (int status) {
+    static int *test_died = NULL;
+    int prev;
+    if (!test_died) {
+        test_died = mmap(0, sizeof (int), PROT_READ | PROT_WRITE,
+                         MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+        *test_died = 0;
+    }
+    prev = *test_died;
+    *test_died = status;
+    return prev;
+}
+
+int
+like_at_loc (int for_match, const char *file, int line, const char *got,
+             const char *expected, const char *fmt, ...)
+{
+    int test;
+    regex_t re;
+    int err = regcomp(&re, expected, REG_EXTENDED);
+    if (err) {
+        char errbuf[256];
+        regerror(err, &re, errbuf, sizeof errbuf);
+        fprintf(stderr, "Unable to compile regex '%s': %s at %s line %d\n",
+                        expected, errbuf, file, line);
+        exit(255);
+    }
+    err = regexec(&re, got, 0, NULL, 0);
+    regfree(&re);
+    test = for_match ? !err : err;
+    va_list args;
+    va_start(args, fmt);
+    vok_at_loc(file, line, test, fmt, args);
+    va_end(args);
+    if (!test) {
+        if (for_match) {
+            diag("                   '%s'", got);
+            diag("    doesn't match: '%s'", expected);
+        }
+        else {
+            diag("                   '%s'", got);
+            diag("          matches: '%s'", expected);
+        }
+    }
+    return test;
+}
+#endif
+
diff --git a/src/common/libtap/tap.h b/src/common/libtap/tap.h
new file mode 100644
index 0000000..2e89b90
--- /dev/null
+++ b/src/common/libtap/tap.h
@@ -0,0 +1,101 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TAP_H__
+#define __TAP_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#define NO_PLAN          -1
+#define ok(...)          ok_at_loc(__FILE__, __LINE__, __VA_ARGS__, NULL)
+#define pass(...)        ok(1, ## __VA_ARGS__)
+#define fail(...)        ok(0, ## __VA_ARGS__)
+#define is(...)          is_at_loc(__FILE__, __LINE__, __VA_ARGS__, NULL)
+#define isnt(...)        isnt_at_loc(__FILE__, __LINE__, __VA_ARGS__, NULL)
+#define cmp_ok(...)      cmp_ok_at_loc(__FILE__, __LINE__, __VA_ARGS__, NULL)
+
+int     vok_at_loc      (const char *file, int line, int test, const char *fmt,
+                         va_list args);
+void    plan            (int tests);
+int     ok_at_loc       (const char *file, int line, int test, const char *fmt,
+                         ...);
+int     diag            (const char *fmt, ...);
+int     note            (const char *fmt, ...);
+int     exit_status     (void);
+void    skippy          (int n, const char *fmt, ...);
+void    ctodo           (int ignore, const char *fmt, ...);
+void    cendtodo        (void);
+int     is_at_loc       (const char *file, int line, const char *got,
+                         const char *expected, const char *fmt, ...);
+int     isnt_at_loc     (const char *file, int line, const char *got,
+                         const char *expected, const char *fmt, ...);
+int     cmp_ok_at_loc   (const char *file, int line, int a, const char *op,
+                         int b, const char *fmt, ...);
+
+#ifdef _WIN32
+#define like(...)   skippy(1, "like is not implemented on MSWin32")
+#define unlike(...) like()
+#else
+#define like(...)   like_at_loc(1, __FILE__, __LINE__, __VA_ARGS__, NULL)
+#define unlike(...) like_at_loc(0, __FILE__, __LINE__, __VA_ARGS__, NULL)
+int     like_at_loc     (int for_match, const char *file, int line,
+                         const char *got, const char *expected,
+                         const char *fmt, ...);
+#endif
+
+#define skip(test, ...)  do {if (test) {skippy(__VA_ARGS__, NULL); break;}
+#define endskip          } while (0)
+
+#define todo(...)        ctodo(0, ## __VA_ARGS__, NULL)
+#define endtodo          cendtodo()
+
+#define dies_ok(code, ...)  dies_ok_common(code, 1, ## __VA_ARGS__)
+#define lives_ok(code, ...) dies_ok_common(code, 0, ## __VA_ARGS__)
+
+#ifdef _WIN32
+#define dies_ok_common(...) \
+    skippy(1, "Death detection is not supported on MSWin32")
+#else
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+int tap_test_died (int status);
+#define dies_ok_common(code, for_death, ...)                \
+    do {                                                    \
+        tap_test_died(1);                                   \
+        int cpid = fork();                                  \
+        switch (cpid) {                                     \
+        case -1:                                            \
+            perror("fork error");                           \
+            exit(EXIT_FAILURE);                             \
+        case 0: /* child  */                                \
+            close(1); close(2);                             \
+            code                                            \
+            tap_test_died(0);                               \
+            exit(EXIT_SUCCESS);                             \
+        }                                                   \
+        if (waitpid(cpid, NULL, 0) < 0) {                   \
+            perror("waitpid error");                        \
+            exit(EXIT_FAILURE);                             \
+        }                                                   \
+        int it_died = tap_test_died(0);                     \
+        if (!it_died) {code}                                \
+        ok(for_death ? it_died : !it_died, ## __VA_ARGS__); \
+    } while (0)
+#endif
+#endif
diff --git a/src/common/libtap/tap_unit.h b/src/common/libtap/tap_unit.h
new file mode 100644
index 0000000..c248fde
--- /dev/null
+++ b/src/common/libtap/tap_unit.h
@@ -0,0 +1,94 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file tap_unit.h
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief libtap test unit.
+ *
+ * Contains description of a single test unit API.
+ *
+ * Export unit_api in each module header file,
+ * and set function pointer to according test routines.
+ *
+ * <b>Example code for myunit.h</b>
+ * \code
+ * #ifndef MYUNIT_TEST_H
+ * #define MYUNIT_TEST_H
+ *
+ * // Export unittest symbol
+ * unit_api mymodule;
+ *
+ * #endif // MYUNIT_TEST_H
+ * \endcode
+ *
+ * <b>Example code for myunit.c</b>
+ * \code
+ * #include "myunit.h"
+ *
+ * // Function to return unit test count
+ * int myunit_count(int argc, char *argv[]) {
+ *     return 1; // Number of tests in this unit
+ * }
+ *
+ * // Function to perform tests
+ * int myunit_run(int argc, char *argv[]) {
+ *     // 1. test
+ *     ok(1 == 1, "test OK");
+ *     return 0;
+ * }
+ *
+ * // Declare module API
+ * unit_api mymodule = {
+ *     "My module",
+ *     &myunit_count,
+ *     &myunit_run
+ * };
+ * \endcode
+ *
+ * To incorporate test, add it to unit tests main().
+ *
+ * See https://github.com/zorgnax/libtap for libtap API reference.
+ *
+ * \addtogroup tests
+ * @{
+ */
+
+#ifndef _TAP_UNIT_H_
+#define _TAP_UNIT_H_
+
+#include "common/libtap/tap.h"
+
+/*! \brief Pointer to function for unit_api. */
+typedef int(unitapi_f)(int, char*[]);
+
+
+/*!
+ * \brief Basic Unit APIs.
+ *
+ * Each unit should have one global variable with
+ * an initialized instance of unit_api.
+ */
+typedef struct {
+	const char *name;  /*!< Test unit name. */
+	unitapi_f  *count; /*!< Function to calculate number of tests. */
+	unitapi_f  *run;   /*!< Function to run unit tests. */
+} unit_api;
+
+#endif // _TAP_UNIT_H_
+
+/*! @} */
+
diff --git a/src/common/lists.c b/src/common/lists.c
new file mode 100644
index 0000000..9a93733
--- /dev/null
+++ b/src/common/lists.c
@@ -0,0 +1,160 @@
+/*
+ *	BIRD Library -- Linked Lists
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+/**
+ * DOC: Linked lists
+ *
+ * The BIRD library provides a set of functions for operating on linked
+ * lists. The lists are internally represented as standard doubly linked
+ * lists with synthetic head and tail which makes all the basic operations
+ * run in constant time and contain no extra end-of-list checks. Each list
+ * is described by a &list structure, nodes can have any format as long
+ * as they start with a &node structure. If you want your nodes to belong
+ * to multiple lists at once, you can embed multiple &node structures in them
+ * and use the SKIP_BACK() macro to calculate a pointer to the start of the
+ * structure from a &node pointer, but beware of obscurity.
+ *
+ * There also exist safe linked lists (&slist, &snode and all functions
+ * being prefixed with |s_|) which support asynchronous walking very
+ * similar to that used in the &fib structure.
+ */
+
+#define _BIRD_LISTS_C_
+
+#include <stdlib.h>
+#include <string.h>
+#include "common/lists.h"
+
+/**
+ * add_tail - append a node to a list
+ * @l: linked list
+ * @n: list node
+ *
+ * add_tail() takes a node @n and appends it at the end of the list @l.
+ */
+LIST_INLINE void
+add_tail(list *l, node *n)
+{
+  node *z = l->tail;
+
+  n->next = (node *) &l->null;
+  n->prev = z;
+  z->next = n;
+  l->tail = n;
+}
+
+/**
+ * add_head - prepend a node to a list
+ * @l: linked list
+ * @n: list node
+ *
+ * add_head() takes a node @n and prepends it at the start of the list @l.
+ */
+LIST_INLINE void
+add_head(list *l, node *n)
+{
+  node *z = l->head;
+
+  n->next = z;
+  n->prev = (node *) &l->head;
+  z->prev = n;
+  l->head = n;
+}
+
+/**
+ * insert_node - insert a node to a list
+ * @n: a new list node
+ * @after: a node of a list
+ *
+ * Inserts a node @n to a linked list after an already inserted
+ * node @after.
+ */
+LIST_INLINE void
+insert_node(node *n, node *after)
+{
+  node *z = after->next;
+
+  n->next = z;
+  n->prev = after;
+  after->next = n;
+  z->prev = n;
+}
+
+/**
+ * rem_node - remove a node from a list
+ * @n: node to be removed
+ *
+ * Removes a node @n from the list it's linked in.
+ */
+LIST_INLINE void
+rem_node(node *n)
+{
+  node *z = n->prev;
+  node *x = n->next;
+
+  z->next = x;
+  x->prev = z;
+  n->prev = 0;
+  n->next = 0;
+}
+
+/**
+ * init_list - create an empty list
+ * @l: list
+ *
+ * init_list() takes a &list structure and initializes its
+ * fields, so that it represents an empty list.
+ */
+LIST_INLINE void
+init_list(list *l)
+{
+  l->head = (node *) &l->null;
+  l->null = NULL;
+  l->tail = (node *) &l->head;
+}
+
+/**
+ * add_tail_list - concatenate two lists
+ * @to: destination list
+ * @l: source list
+ *
+ * This function appends all elements of the list @l to
+ * the list @to in constant time.
+ */
+LIST_INLINE void
+add_tail_list(list *to, list *l)
+{
+  node *p = to->tail;
+  node *q = l->head;
+
+  p->next = q;
+  q->prev = p;
+  q = l->tail;
+  q->next = (node *) &to->null;
+  to->tail = q;
+}
+
+/**
+ * list_dup - duplicate list
+ * @to: destination list
+ * @l: source list
+ *
+ * This function duplicates all elements of the list @l to
+ * the list @to in linear time.
+ *
+ * This function only works with a homogenous item size.
+ */
+void list_dup(list *dst, list *src, size_t itemsz)
+{
+	node *n = 0;
+	WALK_LIST(n, *src) {
+		node *i = malloc(itemsz);
+		memcpy(i, n, itemsz);
+		add_tail(dst, i);
+	}
+}
diff --git a/src/common/lists.h b/src/common/lists.h
new file mode 100644
index 0000000..972ea49
--- /dev/null
+++ b/src/common/lists.h
@@ -0,0 +1,103 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*
+ *	BIRD Library -- Linked Lists
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_LISTS_H_
+#define _BIRD_LISTS_H_
+
+/*
+ * I admit the list structure is very tricky and also somewhat awkward,
+ * but it's both efficient and easy to manipulate once one understands the
+ * basic trick: The list head always contains two synthetic nodes which are
+ * always present in the list: the head and the tail. But as the `next'
+ * entry of the tail and the `prev' entry of the head are both NULL, the
+ * nodes can overlap each other:
+ *
+ *     head    head_node.next
+ *     null    head_node.prev  tail_node.next
+ *     tail                    tail_node.prev
+ */
+
+#include <string.h>  // size_t
+
+typedef struct node {
+  struct node *next, *prev;
+} node;
+
+typedef struct list {			/* In fact two overlayed nodes */
+  struct node *head, *null, *tail;
+} list;
+
+#define NODE (node *)
+#define HEAD(list) ((void *)((list).head))
+#define TAIL(list) ((void *)((list).tail))
+#define WALK_LIST(n,list) for(n=HEAD(list);(NODE (n))->next; \
+				n=(void *)((NODE (n))->next))
+#define WALK_LIST_DELSAFE(n,nxt,list) \
+     for(n=HEAD(list); (nxt=(void *)((NODE (n))->next)); n=(void *) nxt)
+/* WALK_LIST_FIRST supposes that called code removes each processed node */
+#define WALK_LIST_FIRST(n,list) \
+     while(n=HEAD(list), (NODE (n))->next)
+#define WALK_LIST_BACKWARDS(n,list) for(n=TAIL(list);(NODE (n))->prev; \
+				n=(void *)((NODE (n))->prev))
+#define WALK_LIST_BACKWARDS_DELSAFE(n,prv,list) \
+     for(n=TAIL(list); prv=(void *)((NODE (n))->prev); n=(void *) prv)
+
+#define EMPTY_LIST(list) (!(list).head->next)
+
+/*! \brief Free every node in the list. */
+#define WALK_LIST_FREE(list) \
+	do { \
+	node *n=0,*nxt=0;  \
+	WALK_LIST_DELSAFE(n,nxt,list) { \
+	    free(n); \
+	} \
+	} while(0)
+
+void add_tail(list *, node *);
+void add_head(list *, node *);
+void rem_node(node *);
+void add_tail_list(list *, list *);
+void init_list(list *);
+void insert_node(node *, node *);
+void list_dup(list *dst, list *src, size_t itemsz);
+
+/*!
+ * \brief List item for string lists.
+ */
+typedef struct strnode_t {
+	node n;
+	char *str;
+} strnode_t;
+
+/*! \todo This is broken atm.
+#ifndef _BIRD_LISTS_C_
+#define LIST_INLINE extern inline
+#include "knot/lib/lists.c"
+#undef LIST_INLINE
+#else
+#define LIST_INLINE
+#endif
+*/
+#define LIST_INLINE
+
+#endif
diff --git a/src/common/modified_tree.h b/src/common/modified_tree.h
new file mode 100644
index 0000000..4c3e325
--- /dev/null
+++ b/src/common/modified_tree.h
@@ -0,0 +1,292 @@
+/* tree.h -- AVL trees (in the spirit of BSD's 'queue.h')	-*- C -*-	*/
+
+/* Copyright (c) 2005 Ian Piumarta
+ *
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the 'Software'), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * provided that the above copyright notice(s) and this permission notice appear
+ * in all copies of the Software and that both the above copyright notice(s) and
+ * this permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS'.  USE ENTIRELY AT YOUR OWN RISK.
+ */
+
+/* This file defines an AVL balanced binary tree [Georgii M. Adelson-Velskii and
+ * Evgenii M. Landis, 'An algorithm for the organization of information',
+ * Doklady Akademii Nauk SSSR, 146:263-266, 1962 (Russian).  Also in Myron
+ * J. Ricci (trans.), Soviet Math, 3:1259-1263, 1962 (English)].
+ *
+ * An AVL tree is headed by pointers to the root node and to a function defining
+ * the ordering relation between nodes.  Each node contains an arbitrary payload
+ * plus three fields per tree entry: the depth of the subtree for which it forms
+ * the root and two pointers to child nodes (singly-linked for minimum space, at
+ * the expense of direct access to the parent node given a pointer to one of the
+ * children).  The tree is rebalanced after every insertion or removal.  The
+ * tree may be traversed in two directions: forward (in-order left-to-right) and
+ * reverse (in-order, right-to-left).
+ *
+ * Because of the recursive nature of many of the operations on trees it is
+ * necessary to define a number of helper functions for each type of tree node.
+ * The macro TREE_DEFINE(node_tag, entry_name) defines these functions with
+ * unique names according to the node_tag.  This macro should be invoked,
+ * thereby defining the necessary functions, once per node tag in the program.
+ *
+ * For details on the use of these macros, see the tree(3) manual page.
+ */
+
+#ifndef _modified_tree_h
+#define _modified_tree_h
+
+
+#define MOD_TREE_DELTA_MAX	1
+
+#define MOD_TREE_ENTRY(type)			\
+  struct {					\
+    struct type	*avl_left;			\
+    struct type	*avl_right;			\
+    int		 avl_height;			\
+  }
+
+#define MOD_TREE_HEAD(name, type)				\
+  struct name {						\
+    struct type *th_root;				\
+    int  (*th_cmp)(void *lhs, void *rhs);	\
+  }
+
+#define MOD_TREE_INITIALIZER(cmp) { 0, cmp}
+
+#define MOD_TREE_DELTA(self, field)								\
+  (( (((self)->field.avl_left)  ? (self)->field.avl_left->field.avl_height  : 0))	\
+   - (((self)->field.avl_right) ? (self)->field.avl_right->field.avl_height : 0))
+
+/* Recursion prevents the following from being defined as macros. */
+
+#define MOD_TREE_DEFINE(node, field)									\
+													\
+  struct node *MOD_TREE_BALANCE_##node##_##field(struct node *);						\
+													\
+  struct node *MOD_TREE_ROTL_##node##_##field(struct node *self)						\
+  {													\
+    struct node *r= self->field.avl_right;								\
+    self->field.avl_right= r->field.avl_left;								\
+    r->field.avl_left= MOD_TREE_BALANCE_##node##_##field(self);						\
+    return MOD_TREE_BALANCE_##node##_##field(r);								\
+  }													\
+													\
+  struct node *MOD_TREE_ROTR_##node##_##field(struct node *self)						\
+  {													\
+    struct node *l= self->field.avl_left;								\
+    self->field.avl_left= l->field.avl_right;								\
+    l->field.avl_right= MOD_TREE_BALANCE_##node##_##field(self);						\
+    return MOD_TREE_BALANCE_##node##_##field(l);								\
+  }													\
+													\
+  struct node *MOD_TREE_BALANCE_##node##_##field(struct node *self)						\
+  {													\
+    int delta= MOD_TREE_DELTA(self, field);									\
+													\
+    if (delta < -MOD_TREE_DELTA_MAX)									\
+      {													\
+	if (MOD_TREE_DELTA(self->field.avl_right, field) > 0)						\
+	  self->field.avl_right= MOD_TREE_ROTR_##node##_##field(self->field.avl_right);			\
+	return MOD_TREE_ROTL_##node##_##field(self);							\
+      }													\
+    else if (delta > MOD_TREE_DELTA_MAX)									\
+      {													\
+	if (MOD_TREE_DELTA(self->field.avl_left, field) < 0)						\
+	  self->field.avl_left= MOD_TREE_ROTL_##node##_##field(self->field.avl_left);			\
+	return MOD_TREE_ROTR_##node##_##field(self);							\
+      }													\
+    self->field.avl_height= 0;										\
+    if (self->field.avl_left && (self->field.avl_left->field.avl_height > self->field.avl_height))	\
+      self->field.avl_height= self->field.avl_left->field.avl_height;					\
+    if (self->field.avl_right && (self->field.avl_right->field.avl_height > self->field.avl_height))	\
+      self->field.avl_height= self->field.avl_right->field.avl_height;					\
+    self->field.avl_height += 1;									\
+    return self;											\
+  }													\
+													\
+  struct node *MOD_TREE_INSERT_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(void *lhs, void *rhs), int (*merge)(void **lhs, void **rhs), int *merged)\
+  {													\
+    if (!self) {											\
+      *merged = 0;											\
+      return elm; }											\
+    int cmp = compare(elm->data, self->data);									\
+    if (cmp < 0)											\
+      self->field.avl_left= MOD_TREE_INSERT_##node##_##field(self->field.avl_left, elm, compare, merge, merged);	\
+    else if (cmp > 0)											\
+      self->field.avl_right= MOD_TREE_INSERT_##node##_##field(self->field.avl_right, elm, compare, merge, merged);	\
+    else if (merge) {											\
+      merge(&(elm->data), &(self->data));								\
+      *merged = 1; }											\
+    else												\
+      self->field.avl_right= MOD_TREE_INSERT_##node##_##field(self->field.avl_right, elm, compare, merge, merged);	\
+    return MOD_TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  struct node *MOD_TREE_FIND_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(void *lhs, void *rhs))			\
+  {													\
+    if (!compare)											\
+      return 0;												\
+    if (!self)												\
+      return 0;												\
+    if (compare(elm->data, self->data) == 0)									\
+      return self;											\
+    if (compare(elm->data, self->data) < 0)										\
+      return MOD_TREE_FIND_##node##_##field(self->field.avl_left, elm, compare);				\
+    else												\
+      return MOD_TREE_FIND_##node##_##field(self->field.avl_right, elm, compare);				\
+  }													\
+													\
+  int MOD_TREE_FIND_LESS_EQUAL_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(void *lhs, void *rhs), struct node **found, struct node **prev)		\
+  {													\
+    if (!self)												\
+      return 0;												\
+    if (compare(elm->data, self->data) == 0) {									\
+      *found = self;											\
+      return 1;												\
+    }													\
+    if (compare(elm->data, self->data) < 0) {										\
+      int ret = MOD_TREE_FIND_LESS_EQUAL_##node##_##field(self->field.avl_left, elm, compare, found, prev);	\
+      if (ret == 0 && *prev == NULL) {									\
+        *prev = self;											\
+        ret = -1;											\
+      }													\
+      return ret;											\
+    } else {												\
+      *found = self;											\
+      *prev = self;											\
+      return MOD_TREE_FIND_LESS_EQUAL_##node##_##field(self->field.avl_right, elm, compare, found, prev);	\
+    }													\
+  }													\
+													\
+  struct node *MOD_TREE_MOVE_RIGHT_##node##_##field(struct node *self, struct node *rhs)					\
+  {													\
+    if (!self)												\
+      return rhs;											\
+    self->field.avl_right= MOD_TREE_MOVE_RIGHT_##node##_##field(self->field.avl_right, rhs);					\
+    return MOD_TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  struct node *MOD_TREE_REMOVE_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(void *lhs, void *rhs), void (*del)(struct node *lhs))		\
+  {													\
+    if (!self) return 0;										\
+													\
+    if (compare(elm->data, self->data) == 0)									\
+      {													\
+	struct node *tmp= MOD_TREE_MOVE_RIGHT_##node##_##field(self->field.avl_left, self->field.avl_right);			\
+	self->field.avl_left= 0;									\
+	self->field.avl_right= 0;									\
+	del(self);											\
+	return tmp;											\
+      }													\
+    if (compare(elm->data, self->data) < 0)										\
+      self->field.avl_left= MOD_TREE_REMOVE_##node##_##field(self->field.avl_left, elm, compare, del);	\
+    else												\
+      self->field.avl_right= MOD_TREE_REMOVE_##node##_##field(self->field.avl_right, elm, compare, del);	\
+    return MOD_TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  void MOD_TREE_FORWARD_APPLY_ALL_##node##_##field								\
+    (struct node *self, void (*function)(void *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	MOD_TREE_FORWARD_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+	function(self->data, data);										\
+	MOD_TREE_FORWARD_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+      }													\
+  }													\
+													\
+  void MOD_TREE_REVERSE_APPLY_ALL_##node##_##field								\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	MOD_TREE_REVERSE_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+	function(self, data);										\
+	MOD_TREE_REVERSE_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+      }													\
+  }													\
+													\
+  void MOD_TREE_POST_ORDER_APPLY_ALL_##node##_##field							\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	MOD_TREE_POST_ORDER_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+	MOD_TREE_POST_ORDER_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+	function(self, data);										\
+      }													\
+  }													\
+												\
+void MOD_TREE_DESTROY_ALL_##node##_##field							\
+  (struct node *self, void (*function)(void *node, void *data), void(*dest)(struct node *node), void *data)			\
+{													\
+  if (self)												\
+    {													\
+      MOD_TREE_DESTROY_ALL_##node##_##field(self->field.avl_left, function, dest, data);		\
+      MOD_TREE_DESTROY_ALL_##node##_##field(self->field.avl_right, function, dest, data);		\
+      if (function != NULL)										\
+         function(self->data, data);									\
+      dest(self);											\
+    }													\
+}													\
+													\
+  void MOD_TREE_REVERSE_APPLY_POST_ALL_##node##_##field							\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+        MOD_TREE_REVERSE_APPLY_POST_ALL_##node##_##field(self->field.avl_right, function, data);	\
+        MOD_TREE_REVERSE_APPLY_POST_ALL_##node##_##field(self->field.avl_left, function, data);		\
+        function(self, data);										\
+      }													\
+}
+
+#define MOD_TREE_INSERT(head, node, field, elm, merge, merged)						\
+  ((head)->th_root= MOD_TREE_INSERT_##node##_##field((head)->th_root, (elm), (head)->th_cmp, merge, merged))
+
+#define MOD_TREE_FIND(head, node, field, elm)				\
+  (MOD_TREE_FIND_##node##_##field((head)->th_root, (elm), (head)->th_cmp))
+
+#define MOD_TREE_FIND_LESS_EQUAL(head, node, field, elm, found, prev)				\
+  (MOD_TREE_FIND_LESS_EQUAL_##node##_##field((head)->th_root, (elm), (head)->th_cmp, found, prev))
+
+#define MOD_TREE_REMOVE(head, node, field, elm, rem)					\
+  ((head)->th_root= MOD_TREE_REMOVE_##node##_##field((head)->th_root, (elm), (head)->th_cmp, (rem)))
+
+#define MOD_TREE_DEPTH(head, field)			\
+  ((head)->th_root->field.avl_height)
+
+#define MOD_TREE_FORWARD_APPLY(head, node, field, function, data)	\
+  MOD_TREE_FORWARD_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define MOD_TREE_REVERSE_APPLY(head, node, field, function, data)	\
+  MOD_TREE_REVERSE_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define MOD_TREE_POST_ORDER_APPLY(head, node, field, function, data)	\
+  MOD_TREE_POST_ORDER_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define MOD_TREE_DESTROY(head, node, field, function, dest, data)	\
+  MOD_TREE_DESTROY_ALL_##node##_##field((head)->th_root, function, dest, data)
+
+#define MOD_TREE_REVERSE_APPLY_POST(head, node, field, function, data)	\
+  MOD_TREE_REVERSE_APPLY_POST_ALL_##node##_##field((head)->th_root, function, data)
+
+#define MOD_TREE_INIT(head, cmp) do {		\
+    (head)->th_root= 0;				\
+    (head)->th_cmp= (cmp);			\
+  } while (0)
+
+
+#endif /* __MOD_TREE_h */
diff --git a/src/common/print.c b/src/common/print.c
new file mode 100644
index 0000000..9764568
--- /dev/null
+++ b/src/common/print.c
@@ -0,0 +1,57 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+
+#include "print.h"
+
+void hex_printf(const char *data, int length, printf_t print_handler)
+{
+	int ptr = 0;
+	for (; ptr < length; ptr++) {
+		print_handler("0x%02x ", (unsigned char)*(data + ptr));
+	}
+	print_handler("\n");
+}
+
+void hex_print(const char *data, int length)
+{
+	hex_printf(data, length, &printf);
+}
+
+void bit_printf(const char *data, int length, printf_t print_handler)
+{
+	unsigned char mask = 0x01;
+	int ptr = 0;
+	int bit = 0;
+	for (; ptr < length; ptr++) {
+		for (bit = 7; bit >= 0; bit--) {
+			if ((mask << bit) & (unsigned char)*(data + ptr)) {
+				print_handler("1");
+			} else {
+				print_handler("0");
+			}
+		}
+		print_handler(" ");
+	}
+	print_handler("\n");
+}
+
+void bit_print(const char *data, int length)
+{
+	bit_printf(data, length, &printf);
+}
diff --git a/src/common/print.h b/src/common/print.h
new file mode 100644
index 0000000..482f55e
--- /dev/null
+++ b/src/common/print.h
@@ -0,0 +1,72 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file print.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Custom printing functions.
+ *
+ * Downloaded hex_print, bit_print from http://www.digitalpeer.com/id/print
+ * Updated with generic printf handler.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_PRINT_H_
+#define _KNOTD_COMMON_PRINT_H_
+
+typedef int (*printf_t)(const char *fmt, ...);
+
+/*!
+ * \brief Prints the given data as hexadecimal characters.
+ *
+ * \param data Data to print.
+ * \param length Size of the \a data array.
+ */
+void hex_print(const char *data, int length);
+
+/*!
+ * \brief Prints the given data as hexadecimal characters using the given
+ *        handler.
+ *
+ * \param data Data to print.
+ * \param length Size of the \a data array.
+ * \param print_handler Handler for printing.
+ */
+void hex_printf(const char *data, int length, printf_t print_handler);
+
+/*!
+ * \brief Prints the given data as a bitmap.
+ *
+ * \param data Data to print.
+ * \param length Size of the \a data array.
+ */
+void bit_print(const char *data, int length);
+
+/*!
+ * \brief Prints the given data as a bitmap using the given handler.
+ *
+ * \param data Data to print.
+ * \param length Size of the \a data array.
+ * \param print_handler Handler for printing.
+ */
+void bit_printf(const char *data, int length, printf_t print_handler);
+
+#endif /* _KNOTD_COMMON_PRINT_H_ */
+
+/*! @} */
diff --git a/src/common/ref.c b/src/common/ref.c
new file mode 100644
index 0000000..3b9c033
--- /dev/null
+++ b/src/common/ref.c
@@ -0,0 +1,44 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+
+#include "ref.h"
+
+void ref_init(ref_t *p, ref_destructor_t dtor)
+{
+	if (p) {
+		p->count = 0;
+		p->dtor = dtor;
+	}
+}
+
+void ref_retain(ref_t *p)
+{
+	if (p) {
+		__sync_add_and_fetch(&p->count, 1);
+	}
+}
+
+void ref_release(ref_t *p)
+{
+	if (p) {
+		int rc = __sync_sub_and_fetch(&p->count, 1);
+		if (rc == 0 && p->dtor) {
+			p->dtor(p);
+		}
+	}
+}
diff --git a/src/common/ref.h b/src/common/ref.h
new file mode 100644
index 0000000..13a7037
--- /dev/null
+++ b/src/common/ref.h
@@ -0,0 +1,90 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file ref.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Atomic reference counting structures.
+ *
+ * Reference counting allows implicit sharing of objects
+ * between threads with custom destructor functions.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_REF_H_
+#define _KNOTD_REF_H_
+
+#include <stddef.h>
+
+struct ref_t;
+
+/*! \brief Prototype for object destructor callback. */
+typedef void (*ref_destructor_t)(struct ref_t * p);
+
+/*!
+ * \brief Structure for reference counting.
+ *
+ * Size equals to two sizes of pointer size.
+ * Structure may be embedded to the structures which
+ * we want to use for reference counting.
+ *
+ * \code
+ * struct mystruct {
+ *    ref_t ref;
+ *    int mydata;
+ *    char *mystr;
+ * }
+ * \endcode
+ */
+typedef struct ref_t {
+	size_t count;          /*! \brief Reference counter. */
+	ref_destructor_t dtor; /*! \brief Object destructor function. */
+} ref_t;
+
+/*!
+ * \brief Initialize reference counter.
+ *
+ * Set reference counter to 0 and initialize destructor callback.
+ *
+ * \param p Reference-counted object.
+ * \param dtor Destructor function.
+ */
+void ref_init(ref_t *p, ref_destructor_t dtor);
+
+/*!
+ * \brief Mark object as used by the caller.
+ *
+ * Reference counter will be incremented.
+ *
+ * \param p Reference-counted object.
+ */
+void ref_retain(ref_t *p);
+
+/*!
+ * \brief Marks object as unused by the caller.
+ *
+ * Reference counter will be decremented.
+ *
+ * \param p Reference-counted object.
+ */
+void ref_release(ref_t *p);
+
+#endif /* _KNOTD_REF_H_ */
+
+/*! @} */
diff --git a/src/common/skip-list.c b/src/common/skip-list.c
new file mode 100644
index 0000000..79e9429
--- /dev/null
+++ b/src/common/skip-list.c
@@ -0,0 +1,437 @@
+/* Copyright (c) 2010 the authors listed at the following URL, and/or
+the authors of referenced articles or incorporated external code:
+http://en.literateprograms.org/Skip_list_(C)?action=history&offset=20080313195128
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Retrieved from: http://en.literateprograms.org/Skip_list_(C)?oldid=12811
+*/
+
+/*
+ * Modifications by Lubos Slovak, 2010-2011
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <assert.h>
+
+//#include "common.h"
+#include "common/skip-list.h"
+
+#define ERR_ALLOC_FAILED fprintf(stderr, "Allocation failed at %s:%d\n", \
+				 __FILE__, __LINE__)
+
+/*----------------------------------------------------------------------------*/
+
+static const float P = 0.5;
+
+/*!
+ * \brief Maximum level of a node, i.e. maximum number of skip list levels.
+ */
+static const int MAX_LEVEL = 6;
+
+/*----------------------------------------------------------------------------*/
+/* Private functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Generates random real number between 0 and 1.
+ */
+static float frand()
+{
+	unsigned seed = (unsigned)time(0);
+	return (float) rand_r(&seed) / RAND_MAX;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns random level between 0 and MAX_LEVEL.
+ */
+static int skip_random_level()
+{
+	static int first = 1;
+	int lvl = 0;
+
+	if (first) {
+		first = 0;
+	}
+
+	while (frand() < P && lvl < MAX_LEVEL) {
+		lvl++;
+	}
+
+	return lvl;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a new skip list node with the given key and value.
+ *
+ * \param level Level of the skip list node.
+ * \param key Key of the new node.
+ * \param value Value to be stored in the node.
+ *
+ * \return Pointer to the newly created node or NULL if not successful.
+ */
+static skip_node_t *skip_make_node(int level, void *key, void *value)
+{
+	skip_node_t *sn = (skip_node_t *)malloc(sizeof(skip_node_t));
+	if (sn == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	sn->forward = (skip_node_t **)calloc(level + 1, sizeof(skip_node_t *));
+	if (sn->forward == NULL) {
+		ERR_ALLOC_FAILED;
+		free(sn);
+		return NULL;
+	}
+	sn->key = key;
+	sn->value = value;
+	return sn;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Properly deallocates the given skip list node, and optionally destroys
+ *        its key and value.
+ *
+ * \param node Skip list node to be deleted.
+ * \param destroy_key Function for properly destroying the key. If set tu NULL,
+ *                    the object at which the key points will not be destroyed.
+ * \param destroy_value Function for properly destroying the key. If set tu
+ *                      NULL, the object at which the value points will not be
+ *                      destroyed.
+ */
+static void skip_delete_node(skip_node_t **node, void (*destroy_key)(void *),
+                             void (*destroy_value)(void *))
+{
+	if (destroy_key != NULL) {
+		destroy_key((*node)->key);
+	}
+	if (destroy_value != NULL) {
+		destroy_value((*node)->value);
+	}
+
+	free((*node)->forward);
+	free(*node);
+
+	node = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+/* Public functions                                                           */
+/*----------------------------------------------------------------------------*/
+
+skip_list_t *skip_create_list(int (*compare_keys)(void *, void *))
+{
+	assert(compare_keys != NULL);
+
+	skip_list_t *ss = (skip_list_t *)malloc(sizeof(skip_list_t));
+	if (ss == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	ss->head = skip_make_node(MAX_LEVEL, NULL, NULL);
+	if (ss->head == NULL) {
+		ERR_ALLOC_FAILED;
+		free(ss);
+		return NULL;
+	}
+
+	ss->level = 0;
+	ss->compare_keys = compare_keys;
+
+	return ss;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void skip_destroy_list(skip_list_t **list, void (*destroy_key)(void *),
+                       void (*destroy_value)(void *))
+{
+	assert((*list) != NULL);
+	assert((*list)->head != NULL);
+
+	skip_node_t *x;
+
+	while ((*list)->head->forward[0] != NULL) {
+		x = (*list)->head->forward[0];
+		for (int i = 0; i <= (*list)->level; i++) {
+			if ((*list)->head->forward[i] != x) {
+				break;
+			}
+			(*list)->head->forward[i] = x->forward[i];
+		}
+
+		// delete the item
+		skip_delete_node(&x, destroy_key, destroy_value);
+
+		while ((*list)->level > 0
+		       && (*list)->head->forward[(*list)->level] == NULL) {
+			(*list)->level--;
+		}
+	}
+
+	// free the head
+	skip_delete_node(&(*list)->head, NULL, NULL);
+
+	free(*list);
+	*list = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void *skip_find(const skip_list_t *list, void *key)
+{
+	assert(list != NULL);
+	assert(list->head != NULL);
+	assert(list->compare_keys != NULL);
+
+	int i;
+	skip_node_t *x = list->head;
+	for (i = list->level; i >= 0; i--) {
+		while (x->forward[i] != NULL
+		       && list->compare_keys(x->forward[i]->key, key) == -1) {
+			x = x->forward[i];
+		}
+	}
+	x = x->forward[0];
+
+	if (x != NULL && list->compare_keys(x->key, key) == 0) {
+		return x->value;
+	}
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void *skip_find_less_or_equal(const skip_list_t *list, void *key)
+{
+	assert(list != NULL);
+	assert(list->head != NULL);
+	assert(list->compare_keys != NULL);
+
+	int i;
+	skip_node_t *x = list->head;
+	for (i = list->level; i >= 0; i--) {
+		while (x->forward[i] != NULL
+		       && list->compare_keys(x->forward[i]->key, key) <= 0) {
+			x = x->forward[i];
+		}
+	}
+
+	return x->value;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int skip_insert(skip_list_t *list, void *key, void *value,
+                int (*merge_values)(void **, void **))
+{
+	assert(list != NULL);
+	assert(list->head != NULL);
+	assert(list->compare_keys != NULL);
+
+	int i;
+	skip_node_t *x = list->head;
+	skip_node_t *update[MAX_LEVEL + 1];
+	memset(update, 0, MAX_LEVEL + 1);
+
+	for (i = list->level; i >= 0; i--) {
+		while (x->forward[i] != NULL
+		       && list->compare_keys(x->forward[i]->key, key) == -1) {
+			x = x->forward[i];
+		}
+		update[i] = x;
+	}
+	x = x->forward[0];
+
+	if (x == NULL || list->compare_keys(x->key, key) != 0) {
+		int lvl = skip_random_level();
+
+		if (lvl > list->level) {
+			for (i = list->level + 1; i <= lvl; i++) {
+				update[i] = list->head;
+			}
+			list->level = lvl;
+		}
+
+		x = skip_make_node(lvl, key, value);
+		if (x == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+
+		for (i = 0; i <= lvl; i++) {
+			x->forward[i] = update[i]->forward[i];
+			update[i]->forward[i] = x;
+		}
+
+		return 0;
+	} else { // already in the list
+		if (merge_values != NULL) { // if merge function provided, merge
+			return (merge_values(&x->value, &value) == 0) ? 2 : -2;
+		} else {
+			return 1;
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int skip_remove(skip_list_t *list, void *key, void (*destroy_key)(void *),
+                void (*destroy_value)(void *))
+{
+	assert(list != NULL);
+	assert(list->head != NULL);
+	assert(list->compare_keys != NULL);
+
+	int i;
+	skip_node_t *x = list->head;
+	skip_node_t *update[MAX_LEVEL + 1];
+	memset(update, 0, MAX_LEVEL + 1);
+
+	for (i = list->level; i >= 0; i--) {
+		while (x->forward[i] != NULL
+		       && list->compare_keys(x->forward[i]->key, key) == -1) {
+			x = x->forward[i];
+		}
+		update[i] = x;
+	}
+	x = x->forward[0];
+
+	if (x != NULL && list->compare_keys(x->key, key) == 0) {
+		for (i = 0; i <= list->level; i++) {
+			if (update[i]->forward[i] != x) {
+				break;
+			}
+			update[i]->forward[i] = x->forward[i];
+		}
+
+		// delete the item
+		skip_delete_node(&x, destroy_key, destroy_value);
+
+		while (list->level > 0
+		       && list->head->forward[list->level] == NULL) {
+			list->level--;
+		}
+		return 0;
+	} else {
+		return -1;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int skip_is_empty(const skip_list_t *list)
+{
+	if (!list) {
+		return 1;
+	}
+
+	return (list->head->forward[0] == NULL);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const skip_node_t *skip_first(const skip_list_t *list)
+{
+	if (!list) {
+		return NULL;
+	}
+
+	return list->head->forward[0];
+}
+
+/*----------------------------------------------------------------------------*/
+
+const skip_node_t *skip_next(const skip_node_t *node)
+{
+	return node->forward[0];
+}
+
+/*----------------------------------------------------------------------------*/
+
+void skip_print_list(const skip_list_t *list,
+                     void (*print_item)(void *, void *))
+{
+	assert(list != NULL);
+	assert(list->head != NULL);
+	assert(list->compare_keys != NULL);
+	assert(print_item != NULL);
+
+	skip_node_t *x = list->head->forward[0];
+	while (x != NULL) {
+		print_item(x->key, x->value);
+		x = x->forward[0];
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+skip_list_t *skip_copy_list(const skip_list_t *list)
+{
+	skip_list_t *ss = (skip_list_t *)malloc(sizeof(skip_list_t));
+	if (ss == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	ss->head = skip_make_node(list->level, NULL, NULL);
+	if (ss->head == NULL) {
+		ERR_ALLOC_FAILED;
+		free(ss);
+		return NULL;
+	}
+
+	ss->level = list->level;
+	ss->compare_keys = list->compare_keys;
+
+	skip_node_t *x = list->head->forward[0];
+	skip_node_t *prev = list->head;
+	skip_node_t *new_prev = ss->head;
+	while (x != NULL) {
+		//print_item(x->key, x->value);
+
+		// create new node
+		skip_node_t *n = skip_make_node(list->level, x->key, x->value);
+		if (n == NULL) {
+			skip_destroy_list(&ss, NULL, NULL);
+			return NULL;
+		}
+		// set forward pointers from the previous node
+		for (int i = 0; i <= list->level; ++i) {
+			if (prev->forward[i] == x) {
+				new_prev->forward[i] = n;
+			}
+		}
+
+		prev = x;
+		x = x->forward[0];
+		new_prev = n;
+	}
+
+	return ss;
+}
diff --git a/src/common/skip-list.h b/src/common/skip-list.h
new file mode 100644
index 0000000..784f366
--- /dev/null
+++ b/src/common/skip-list.h
@@ -0,0 +1,215 @@
+/*!
+ * \file skip-list.h
+ *
+ * \author Copyright (c) 2010 the authors listed at the following URL, and/or
+ *         the authors of referenced articles or incorporated external code:
+ *         http://en.literateprograms.org/Skip_list_(C)?action=history&offset=20080313195128
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Generic skip-list implementation.
+ *
+ * Original retrieved from http://en.literateprograms.org/Skip_list_(C)?oldid=12811
+ * Modifications by Lubos Slovak, 2010
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+/* Copyright (c) 2010 the authors listed at the following URL, and/or
+the authors of referenced articles or incorporated external code:
+http://en.literateprograms.org/Skip_list_(C)?action=history&offset=20080313195128
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Retrieved from: http://en.literateprograms.org/Skip_list_(C)?oldid=12811
+*/
+
+#ifndef _KNOTD_COMMON_SKIP_LIST_H_
+#define _KNOTD_COMMON_SKIP_LIST_H_
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Skip list node.
+ */
+struct skip_node {
+	void *key; /*!< Key of the node. Used for ordering. */
+
+	void *value; /*!< Value stored in the node. */
+
+	/*! \brief Pointers to next item on various levels. */
+	struct skip_node **forward;
+};
+
+typedef struct skip_node skip_node_t;
+
+/*!
+ * \brief Skip list.
+ *
+ * \todo Implement quasi-randomization.
+ */
+struct skip_list {
+	/*! \brief Head of the list (with no actual key and value stored). */
+	skip_node_t *head;
+
+	/*! \brief Actual maximum level of the list. */
+	int level;
+
+	/*! \brief Function for comparing two skip list item's keys. */
+	int (*compare_keys)(void *, void *);
+};
+
+typedef struct skip_list skip_list_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a new generic skip list.
+ *
+ * \param compare_keys Function for comparing the keys.
+ * \todo What should compare_keys exactly return?
+ *
+ * \return Pointer to the newly created skip list if successful. NULL otherwise.
+ */
+skip_list_t *skip_create_list(int (*compare_keys)(void *, void *));
+
+/*!
+ * \brief Properly destroys the list, possibly also with the keys and values.
+ *
+ * \param list Skip list to be destroyed.
+ * \param destroy_key Function for properly destroying the key. If set tu NULL,
+ *                    the object at which the key points will not be destroyed.
+ * \param destroy_value Function for properly destroying the key. If set tu
+ *                      NULL, the object at which the value points will not be
+ *                      destroyed.
+ */
+void skip_destroy_list(skip_list_t **list, void (*destroy_key)(void *),
+                       void (*destroy_value)(void *));
+
+/*!
+ * \brief Inserts a new key-value pair into the skip list.
+ *
+ * The \a merge_values function should  merge the second value to the first
+ * value. It must not delete the first value. The second value also should not
+ * be deleted (as this is concern of the caller).
+ *
+ * \param list The skip list to insert to.
+ * \param key Key of the item to be inserted. Used for ordering.
+ * \param value Value of the item to be inserted.
+ * \param merge_values Function for merging the saved values. Optional. If set
+ *                     to NULL, the skip list will not merge values when
+ *                     attempting to insert item with key already present in the
+ *                     list.
+ *                     \todo What are the function parameters and what should it
+ *                           return as integer?
+ *
+ * \retval 0 If successful and the key was not yet present in the list.
+ * \retval 1 If the key was already present and the new value was ignored
+ *           (because no merging function was provided).
+ * \retval 2 If successful, the key was already present and the values were
+ *           merged.
+ * \retval -1 If an error occured and the key was not present in the list.
+ * \retval -2 If the key is already present in the list and merging was
+ *            unsuccessful.
+ */
+int skip_insert(skip_list_t *list, void *key, void *value,
+                int (*merge_values)(void **, void **));
+
+/*!
+ * \brief Removes an item with the given key from the list and optionally
+ *        deletes the item's key and value.
+ *
+ * \param list Skip list to delete from.
+ * \param key Key of the item to be deleted.
+ * \param destroy_key Function for properly destroying the key. If set tu NULL,
+ *                    the object at which the key points will not be destroyed.
+ * \param destroy_value Function for properly destroying the key. If set tu
+ *                      NULL, the object at which the value points will not be
+ *                      destroyed.
+ *
+ * \retval 0 If successful.
+ * \retval -1 If the item was not present in the list.
+ */
+int skip_remove(skip_list_t *list, void *key, void (*destroy_key)(void *),
+                void (*destroy_value)(void *));
+
+/*!
+ * \brief Tries to find item with the given key in the list.
+ *
+ * \param list Skip list to search in.
+ * \param key Key of the item to be found.
+ *
+ * \return Value stored in the item with key \a key, or NULL if the key was not
+ *         found.
+ */
+void *skip_find(const skip_list_t *list, void *key);
+
+/*!
+ * \brief Returns item with largest key smaller or equal than \a key.
+ *
+ * \param list Skip list to search in.
+ * \param key Key of the item to be found.
+ *
+ * \return Value stored in the item with largest key smaller or equal than \a
+ *         key, or NULL if the key was not found.
+ */
+void *skip_find_less_or_equal(const skip_list_t *list, void *key);
+
+/*!
+ * \brief Checks if the skip list is empty.
+ *
+ * \param list Skip list to check.
+ *
+ * \retval 1 if empty.
+ * \retval 0 if non-empty.
+ */
+int skip_is_empty(const skip_list_t *list);
+
+/*!
+ * \brief Returns the first item in the skip list.
+ */
+const skip_node_t *skip_first(const skip_list_t *list);
+
+/*!
+ * \brief Returns the next item in the skip list.
+ */
+const skip_node_t *skip_next(const skip_node_t *node);
+
+/*!
+ * \brief Prints the whole list using the given print function.
+ *
+ * \param list Skip list to be printed.
+ * \param print_item Function for printing the key-value pair.
+ */
+void skip_print_list(const skip_list_t *list,
+                     void (*print_item)(void *, void *));
+
+/*!
+ * \brief Copies the skip list.
+ *
+ * \param list Skip list to be copied.
+ *
+ * \return Copy of \a list.
+ *
+ * \todo Test!!!
+ */
+skip_list_t *skip_copy_list(const skip_list_t *list);
+
+#endif /* _KNOTD_COMMON_SKIP_LIST_H_ */
+
+/*! @} */
diff --git a/src/common/slab/alloc-common.h b/src/common/slab/alloc-common.h
new file mode 100644
index 0000000..32878ab
--- /dev/null
+++ b/src/common/slab/alloc-common.h
@@ -0,0 +1,61 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file alloc-common.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Common macros for alloc.
+ *
+ * \addtogroup alloc
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_ALLOC_COMMON_H_
+#define _KNOTD_COMMON_ALLOC_COMMON_H_
+
+#include <stdio.h>
+
+//#define MEM_DEBUG
+//#define MEM_NOSLAB
+//#define MEM_POISON
+#define MEM_SLAB_CAP 5   // Cap slab_cache empty slab count (undefined = inf)
+#define MEM_COLORING       // Slab cache coloring
+//#define MEM_SLAB_DEPOT     // Use slab depot for slab caching (not thread-safe)
+
+/* Eliminate compiler warning with unused parameters. */
+#ifndef UNUSED
+#define UNUSED(param) (void)(param)
+#endif
+
+/* Optimisation macros. */
+#ifndef likely
+#define likely(x)       __builtin_expect((x),1)
+#endif
+#ifndef unlikely
+#define unlikely(x)     __builtin_expect((x),0)
+#endif
+
+#ifdef MEM_DEBUG
+#define dbg_mem(msg...) fprintf(stderr, msg)
+#else
+#define dbg_mem(msg...)
+#endif
+
+
+#endif /* _KNOTD_COMMON_ALLOC_COMMON_H_ */
+
+/*! @} */
diff --git a/src/common/slab/malloc.c b/src/common/slab/malloc.c
new file mode 100644
index 0000000..ec5a68d
--- /dev/null
+++ b/src/common/slab/malloc.c
@@ -0,0 +1,60 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+/*
+ * Skip unit if not debugging memory.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/resource.h>
+
+#include "common/slab/alloc-common.h"
+
+#ifdef MEM_DEBUG
+/*
+ * ((destructor)) attribute executes this function after main().
+ * \see http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
+ */
+void __attribute__ ((destructor)) usage_dump()
+#else
+void usage_dump()
+#endif
+{
+	/* Get resource usage. */
+	struct rusage usage;
+	if (getrusage(RUSAGE_SELF, &usage) < 0) {
+		memset(&usage, 0, sizeof(struct rusage));
+	}
+
+	fprintf(stderr, "\nMemory statistics:");
+	fprintf(stderr, "\n==================\n");
+
+	fprintf(stderr, "User time: %.03lf ms\nSystem time: %.03lf ms\n",
+	        usage.ru_utime.tv_sec * (double) 1000.0
+	        + usage.ru_utime.tv_usec / (double)1000.0,
+	        usage.ru_stime.tv_sec * (double) 1000.0
+	        + usage.ru_stime.tv_usec / (double)1000.0);
+	fprintf(stderr, "Major page faults: %lu (required I/O)\nMinor page faults: %lu\n",
+	        usage.ru_majflt, usage.ru_minflt);
+	fprintf(stderr, "Number of swaps: %lu\n",
+	        usage.ru_nswap);
+	fprintf(stderr, "Voluntary context switches: %lu\nInvoluntary context switches: %lu\n",
+	        usage.ru_nvcsw,
+	        usage.ru_nivcsw);
+	fprintf(stderr, "==================\n");
+}
diff --git a/src/common/slab/malloc.h b/src/common/slab/malloc.h
new file mode 100644
index 0000000..8ca9f58
--- /dev/null
+++ b/src/common/slab/malloc.h
@@ -0,0 +1,43 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file malloc.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Memory allocation related functions.
+ *
+ * \addtogroup alloc
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_MALLOC_H_
+#define _KNOTD_COMMON_MALLOC_H_
+
+#include <stdlib.h>
+
+/*! \brief Print usage statistics.
+ *
+ *  \note This function has destructor attribute set if MEM_DEBUG is enabled.
+ *
+ *  \warning Not all printed statistics are available on every OS,
+ *           consult manual page for getrusage(2).
+ */
+void usage_dump();
+
+#endif // _KNOTD_COMMON_MALLOC_H_
+
+/*! @} */
diff --git a/src/common/slab/slab.c b/src/common/slab/slab.c
new file mode 100644
index 0000000..ccdf7ca
--- /dev/null
+++ b/src/common/slab/slab.c
@@ -0,0 +1,732 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include "common/slab/alloc-common.h"
+#include "common/slab/slab.h"
+
+/*
+ * Magic constants.
+ */
+#define SLAB_MAGIC    0x51  /*!< "Sl" magic byte (slab type). */
+#define LOBJ_MAGIC    0x0B  /*!< "Ob" magic byte (object type). */
+#define POISON_DWORD  0xdeadbeef /*!< Memory boundary guard magic. */
+#define SLAB_MINCOLOR 64 /*!< Minimum space reserved for cache coloring. */
+#define SLAB_HEADER   sizeof(slab_t) /*!< Slab header size. */
+#define ALIGN_PTRSZ   __attribute__ ((__aligned__(sizeof(void*))))
+
+/*! \brief Fast cache id lookup table.
+ *
+ * Provides O(1) lookup.
+ * Filled with interesting values from default
+ * or on-demand.
+ */
+unsigned ALIGN_PTRSZ SLAB_CACHE_LUT[SLAB_SIZE] = {
+        [24]  = SLAB_GP_COUNT + 1,
+        [800] = SLAB_GP_COUNT + 2
+};
+
+/*! \brief Find the next highest power of 2. */
+static inline unsigned get_next_pow2(unsigned v)
+{
+	// Next highest power of 2
+	--v;
+	v |= v >> 1; v |= v >> 2;
+	v |= v >> 4; v |= v >> 8;
+	v |= v >> 16;
+	++v;
+
+	return v;
+}
+
+/*! \brief Return binary logarithm of a number, which is a power of 2. */
+static inline unsigned fastlog2(unsigned v)
+{
+	// Works if we know the size is a power of 2
+	register unsigned int r = (v & 0xAAAAAAAA) != 0;
+	r |= ((v & 0xFFFF0000) != 0) << 4;
+	r |= ((v & 0xFF00FF00) != 0) << 3;
+	r |= ((v & 0xF0F0F0F0) != 0) << 2;
+	r |= ((v & 0xCCCCCCCC) != 0) << 1;
+	return r;
+}
+
+/*!
+ * \brief Fast hashing function.
+ *
+ * Finds the next highest power of 2 and returns binary logarithm.
+ * Values are stored in LUT cache for future access.
+ */
+static unsigned slab_cache_id(unsigned size)
+{
+	// Assert cache id of the smallest bufsize is 0
+	if(size <= SLAB_MIN_BUFLEN) {
+		return 0;
+	}
+
+	// Check LUT
+	unsigned id = 0;
+	if ((id = SLAB_CACHE_LUT[size])) {
+		return id;
+	} else {
+
+		// Compute binary logarithm
+		// Next highest power of 2
+		id = fastlog2(get_next_pow2(size));
+
+		// Shift cacheid of SLAB_MIN_BUFLEN to 0
+		id -= SLAB_EXP_OFFSET;
+
+		// Store
+		SLAB_CACHE_LUT[size] = id;
+	}
+
+	return id;
+}
+
+/*
+ * Slab run-time constants.
+ */
+
+size_t SLAB_MASK = 0; /*!< \brief Slab address mask (for computing offsets). */
+static unsigned SLAB_LOGSIZE = 0; /*!< \brief Binary logarithm of slab size. */
+
+/*!
+ * Depot is a caching sub-allocator of slabs.
+ * It mitigates performance impact of sequentially allocating and freeing
+ * from a slab with just a few slab items by caching N slabs before returning
+ * them to the system.
+ *
+ * \todo With wider use, locking or RCU will be necessary.
+ */
+#ifdef MEM_SLAB_DEPOT
+static slab_depot_t _depot_g; /*! \brief Global slab depot. */
+#endif // MEM_SLAB_DEPOT
+
+/*!
+ * \brief Allocate a slab of given bufsize from depot.
+ *
+ * \retval Reserved memory for slab on success.
+ * \retval NULL on errors.
+ */
+static void* slab_depot_alloc(size_t bufsize)
+{
+    void *page = 0;
+#ifdef MEM_SLAB_DEPOT
+	if (_depot_g.available) {
+		for (int i = _depot_g.available - 1; i > -1 ; --i) {
+			if(_depot_g.cache[i]->bufsize == bufsize) {
+				page = _depot_g.cache[i];
+				_depot_g.cache[i] = _depot_g.cache[--_depot_g.available];
+				return page;
+			}
+		}
+		page = _depot_g.cache[--_depot_g.available];
+	} else {
+		if(posix_memalign(&page, SLAB_SIZE, SLAB_SIZE) == 0) {
+			((slab_t*)page)->bufsize = 0;
+		} else {
+			page = 0;
+		}
+
+	}
+#else // MEM_SLAB_DEPOT
+    if(posix_memalign(&page, SLAB_SIZE, SLAB_SIZE) == 0) {
+	((slab_t*)page)->bufsize = 0;
+    } else {
+	page = 0;
+    }
+#endif // MEM_SLAB_DEPOT
+
+	return page;
+}
+
+/*!
+ * \brief Return a slab to the depot.
+ *
+ * \note If the depot is full, slab gets immediately freed.
+ */
+static inline void slab_depot_free(void* slab)
+{
+#ifdef MEM_SLAB_DEPOT
+	if (_depot_g.available < SLAB_DEPOT_SIZE) {
+		_depot_g.cache[_depot_g.available++] = slab;
+	} else {
+		free(slab);
+	}
+#else // MEM_SLAB_DEPOT
+    free(slab);
+#endif // MEM_SLAB_DEPOT
+}
+
+/*! \brief Initialize slab depot. */
+static void slab_depot_init()
+{
+#ifdef MEM_SLAB_DEPOT
+	_depot_g.available = 0;
+#endif // MEM_SLAB_DEPOT
+}
+
+/*! \brief Destroy slab depot. */
+static void slab_depot_destroy()
+{
+#ifdef MEM_SLAB_DEPOT
+	while(_depot_g.available) {
+		free(_depot_g.cache[--_depot_g.available]);
+	}
+#endif // MEM_SLAB_DEPOT
+}
+
+/*
+ * Initializers.
+ */
+
+/*! \brief Initializes slab subsystem (it is called automatically). */
+void __attribute__ ((constructor)) slab_init()
+{
+	// Fetch page size
+	SLAB_LOGSIZE = fastlog2(SLAB_SIZE);
+
+	// Compute slab page mask
+	SLAB_MASK = 0;
+	for (int i = 0; i < SLAB_LOGSIZE; ++i) {
+		SLAB_MASK |= 1 << i;
+	}
+	SLAB_MASK = ~SLAB_MASK;
+
+	// Initialize depot
+	slab_depot_init();
+}
+
+/*! \brief Deinitializes slab subsystem (it is called automatically). */
+void __attribute__ ((destructor)) slab_deinit()
+{
+	// Deinitialize global allocator
+	if (SLAB_LOGSIZE) {
+		slab_depot_destroy();
+		SLAB_LOGSIZE = SLAB_MASK = 0;
+	}
+}
+
+/*
+ * Cache helper functions.
+ */
+
+/* \notice Not used right now.
+static void slab_dump(slab_t* slab) {
+
+	printf("%s: buffers (bufsize=%zuB, %u/%u free): \n",
+	       __func__, slab->cache->bufsize, slab->bufs_free,
+	       slab->bufs_count);
+
+	void** buf = slab->head;
+	int i = 0, n = 0;
+	while(buf != 0) {
+		size_t diff = (size_t)((char*)buf - (char*)slab->base);
+		printf("-> %lu", diff / slab->cache->bufsize);
+		buf = (void**)(*buf);
+		if (++i == 10) {
+			printf("\n");
+			i = 0;
+		}
+		++n;
+	}
+
+	printf("\n");
+}
+*/
+
+/*!
+ * \brief Free all slabs from a slab cache.
+ * \return Number of freed slabs.
+ */
+static inline int slab_cache_free_slabs(slab_t* slab)
+{
+	int count = 0;
+	while (slab) {
+		slab_t* next = slab->next;
+		slab_destroy(&slab);
+		++count;
+		slab = next;
+
+	}
+	return count;
+}
+
+/*
+ * Slab helper functions.
+ */
+
+/*! \brief Return number of slabs in a linked list. */
+static inline unsigned slab_list_walk(slab_t* slab)
+{
+	unsigned count = 0;
+	while(slab) {
+		slab = slab->next;
+		++count;
+	}
+	return count;
+}
+
+/*! \brief Remove slab from a linked list. */
+static void slab_list_remove(slab_t* slab)
+{
+	// Disconnect from list
+	if (slab->prev) {
+		slab->prev->next = slab->next;
+	}
+	if(slab->next) {
+		slab->next->prev = slab->prev;
+	}
+
+	// Disconnect from cache
+	slab_cache_t* cache = slab->cache;
+	{
+		if (cache->slabs_free == slab) {
+			cache->slabs_free = slab->next;
+		} else if (cache->slabs_full == slab) {
+			cache->slabs_full = slab->next;
+		}
+	}
+}
+
+/*! \brief Insert slab into a linked list. */
+static void slab_list_insert(slab_t** list, slab_t* item)
+{
+	// If list exists, push to the top
+	item->prev = 0;
+	item->next = *list;
+	if(*list) {
+		(*list)->prev = item;
+	}
+	*list = item;
+}
+
+/*! \brief Move slab from one linked list to another. */
+static inline void slab_list_move(slab_t** target, slab_t* slab)
+{
+	slab_list_remove(slab);
+	slab_list_insert(target, slab);
+}
+
+/*
+ * API functions.
+ */
+
+slab_t* slab_create(slab_cache_t* cache)
+{
+	const size_t size = SLAB_SIZE;
+
+	slab_t* slab = slab_depot_alloc(cache->bufsize);
+
+	if (unlikely(slab < 0)) {
+		dbg_mem("%s: failed to allocate aligned memory block\n",
+		          __func__);
+		return 0;
+	}
+
+	/* Initialize slab. */
+	slab->magic = SLAB_MAGIC;
+	slab->cache = cache;
+	slab_list_insert(&cache->slabs_free, slab);
+#ifdef MEM_SLAB_CAP
+	++cache->empty;
+#endif
+
+	/* Already initialized? */
+	if (slab->bufsize == cache->bufsize) {
+		return slab;
+	} else {
+		slab->bufsize = cache->bufsize;
+	}
+
+	/* Ensure the item size can hold at least a size of ptr. */
+	size_t item_size = slab->bufsize;
+	if (unlikely(item_size < SLAB_MIN_BUFLEN)) {
+		item_size = SLAB_MIN_BUFLEN;
+	}
+
+	/* Ensure at least some space for coloring */
+	size_t data_size = size - sizeof(slab_t);
+#ifdef MEM_COLORING
+	size_t free_space = data_size % item_size;
+	if (unlikely(free_space < SLAB_MINCOLOR)) {
+		free_space = SLAB_MINCOLOR;
+	}
+
+
+	/// unsigned short color = __sync_fetch_and_add(&cache->color, 1);
+	unsigned short color = (cache->color += sizeof(void*));
+	color = color % free_space;
+#else
+	const unsigned short color = 0;
+#endif
+
+	/* Calculate useable data size */
+	data_size -= color;
+	slab->bufs_count = data_size / item_size;
+	slab->bufs_free = slab->bufs_count;
+
+	// Save first item as next free
+	slab->base = (char*)slab + sizeof(slab_t) + color;
+	slab->head = (void**)slab->base;
+
+	// Create freelist, skip last member, which is set to NULL
+	char* item = (char*)slab->head;
+	for(unsigned i = 0; i < slab->bufs_count - 1; ++i) {
+		*((void**)item) = item + item_size;
+		item += item_size;
+	}
+
+	// Set last buf to NULL (tail)
+	*((void**)item) = (void*)0;
+
+	// Ensure the last item has a NULL next
+	dbg_mem("%s: created slab (%p, %p) (%zu B)\n",
+	          __func__, slab, slab + size, size);
+	return slab;
+}
+
+void slab_destroy(slab_t** slab)
+{
+	/* Disconnect from the list */
+	slab_list_remove(*slab);
+
+	/* Free slab */
+	slab_depot_free(*slab);
+
+	/* Invalidate pointer. */
+	dbg_mem("%s: deleted slab %p\n", __func__, *slab);
+	*slab = 0;
+}
+
+void* slab_alloc(slab_t* slab)
+{
+	// Fetch first free item
+	void **item = 0;
+	{
+		if((item = slab->head)) {
+			slab->head = (void**)*item;
+			--slab->bufs_free;
+		} else {
+			// No more free items
+			return 0;
+		}
+	}
+
+#ifdef MEM_DEBUG
+	// Increment statistics
+	__sync_add_and_fetch(&slab->cache->stat_allocs, 1);
+#endif
+
+	// Move to full?
+	if (unlikely(slab->bufs_free == 0)) {
+		slab_list_move(&slab->cache->slabs_full, slab);
+	} else {
+#ifdef MEM_SLAB_CAP
+		// Mark not empty?
+		if (unlikely(slab->bufs_free == slab->bufs_count - 1)) {
+			--slab->cache->empty;
+		}
+#endif
+	}
+
+	return item;
+}
+
+void slab_free(void* ptr)
+{
+	// Null pointer check
+	if (unlikely(!ptr)) {
+		return;
+	}
+
+	// Get slab start address
+	slab_t* slab = slab_from_ptr(ptr);
+	assert(slab);
+
+	// Check if it exists in directory
+	if (slab->magic == SLAB_MAGIC) {
+
+		// Return buf to slab
+		*((void**)ptr) = (void*)slab->head;
+		slab->head = (void**)ptr;
+		++slab->bufs_free;
+
+#ifdef MEM_DEBUG
+		// Increment statistics
+		__sync_add_and_fetch(&slab->cache->stat_frees, 1);
+#endif
+
+		// Return to partial
+		if(unlikely(slab->bufs_free == 1)) {
+			slab_list_move(&slab->cache->slabs_free, slab);
+		} else {
+#ifdef MEM_SLAB_CAP
+		// Recycle if empty
+			if(unlikely(slab_isempty(slab))) {
+				if(slab->cache->empty == MEM_SLAB_CAP) {
+					slab_destroy(&slab);
+				} else {
+					++slab->cache->empty;
+				}
+			}
+#endif
+		}
+
+	} else {
+
+		// Pointer is not a slab
+		// Presuming it's a large block
+		slab_obj_t* bs = (slab_obj_t*)ptr - 1;
+
+#ifdef MEM_POISON
+		// Remove memory barrier
+		mprotect(ptr + bs->size, sizeof(int), PROT_READ|PROT_WRITE);
+#endif
+
+		// Unmap
+		dbg_mem("%s: unmapping large block of %zu bytes at %p\n",
+		          __func__, bs->size, ptr);
+		free(bs);
+	}
+}
+
+int slab_cache_init(slab_cache_t* cache, size_t bufsize)
+{
+	if (unlikely(!bufsize)) {
+		return -1;
+	}
+
+	cache->empty = 0;
+	cache->bufsize = bufsize;
+	cache->slabs_free = cache->slabs_full = 0;
+	cache->color = 0;
+
+	/* Initialize stats */
+	cache->stat_allocs = cache->stat_frees = 0;
+
+	dbg_mem("%s: created cache of size %zu\n",
+	          __func__, bufsize);
+
+	return 0;
+}
+
+void slab_cache_destroy(slab_cache_t* cache) {
+
+	// Free slabs
+	unsigned free_s = slab_cache_free_slabs(cache->slabs_free);
+	unsigned full_s = slab_cache_free_slabs(cache->slabs_full);
+#ifndef MEM_DEBUG
+	UNUSED(free_s);
+	UNUSED(full_s);
+#else
+	dbg_mem("%s: %u empty/partial, %u full caches\n",
+	          __func__, free_s, full_s);
+#endif
+
+	// Invalidate cache
+	cache->bufsize = 0;
+	cache->slabs_free = cache->slabs_full = 0;
+}
+
+void* slab_cache_alloc(slab_cache_t* cache)
+{
+	slab_t* slab = cache->slabs_free;
+	if(!cache->slabs_free) {
+		slab = slab_create(cache);
+		if (slab == NULL) {
+			return NULL;
+		}
+	}
+
+
+	return slab_alloc(slab);
+}
+
+int slab_cache_reap(slab_cache_t* cache)
+{
+	// For now, just free empty slabs
+	slab_t* slab = cache->slabs_free;
+	int count = 0;
+	while (slab) {
+		slab_t* next = slab->next;
+		if (slab_isempty(slab)) {
+			slab_destroy(&slab);
+			++count;
+		}
+		slab = next;
+
+	}
+
+	cache->empty = 0;
+	return count;
+}
+
+int slab_alloc_init(slab_alloc_t* alloc)
+{
+	// Invalidate
+	memset(alloc, 0, sizeof(slab_alloc_t));
+
+	// Initialize descriptors cache
+	slab_cache_init(&alloc->descriptors, sizeof(slab_cache_t));
+
+	return 0;
+}
+
+void slab_alloc_destroy(slab_alloc_t* alloc)
+{
+	// Destroy all caches
+	for (unsigned i = 0; i < SLAB_CACHE_COUNT; ++i) {
+		if (alloc->caches[i] != 0) {
+			slab_cache_destroy(alloc->caches[i]);
+		}
+	}
+
+	// Destroy cache for descriptors
+	slab_cache_destroy(&alloc->descriptors);
+}
+
+void* slab_alloc_alloc(slab_alloc_t* alloc, size_t size)
+{
+	// Invalid size check
+	if (unlikely(!size)) {
+		return 0;
+	}
+
+#ifdef MEM_POISON
+	// Reserve memory for poison
+	size += sizeof(int);
+#endif
+	// Directly map large block
+	if (unlikely(size > SLAB_SIZE/2)) {
+
+		// Map block
+		size += sizeof(slab_obj_t);
+		slab_obj_t* p = 0;
+		p = malloc(size);
+
+		dbg_mem("%s: mapping large block of %zu bytes at %p\n",
+		          __func__, size, p + 1);
+
+		/* Initialize. */
+		p->magic = LOBJ_MAGIC;
+		p->size = size - sizeof(slab_obj_t);
+
+#ifdef MEM_POISON
+		// Reduce real size
+		p->size -= sizeof(int);
+
+		// Memory barrier
+		int* pb = (int*)((char*)p + size - sizeof(int));
+		*pb = POISON_DWORD;
+		mprotect(pb, sizeof(int), PROT_NONE);
+#endif
+
+		return p + 1;
+	}
+
+	// Get cache id from size
+	unsigned cache_id = slab_cache_id(size);
+
+	// Check if associated cache exists
+	if (unlikely(alloc->caches[cache_id] == 0)) {
+
+		// Assert minimum cache size
+		if (unlikely(size < SLAB_MIN_BUFLEN)) {
+			size = SLAB_MIN_BUFLEN;
+		}
+
+		// Calculate cache bufsize
+		size_t bufsize = size;
+		if (cache_id < SLAB_GP_COUNT) {
+			bufsize = get_next_pow2(size);
+		}
+
+		// Create cache
+		dbg_mem("%s: creating cache of %zuB (req. %zuB) (id=%u)\n",
+		          __func__, bufsize, size, cache_id);
+
+		slab_cache_t* cache = slab_cache_alloc(&alloc->descriptors);
+		slab_cache_init(cache, bufsize);
+		alloc->caches[cache_id] = cache;
+	}
+
+	// Allocate from cache
+	void* mem = slab_cache_alloc(alloc->caches[cache_id]);
+
+#ifdef MEM_POISON
+	// Memory barrier
+	/*! \todo Broken, need to store the barrier byte size. */
+	//int* pb = (int*)((char*)mem + size - sizeof(int));
+	//mprotect(pb, sizeof(int), PROT_NONE);
+#endif
+	return mem;
+}
+
+void *slab_alloc_realloc(slab_alloc_t* alloc, void *ptr, size_t size)
+{
+	// realloc(0) equals to free(ptr)
+	if (!size) {
+		slab_free(ptr);
+		return 0;
+	}
+
+	// Allocate new buf
+	void *nptr = slab_alloc_alloc(alloc, size);
+	assert(nptr);
+
+	// Copy memory if present
+	if (ptr) {
+		slab_t* slab = slab_from_ptr(ptr);
+		memcpy(nptr, ptr, slab->cache->bufsize);
+
+		// Free old buf
+		slab_free(ptr);
+	}
+
+	return nptr;
+}
+
+void slab_alloc_stats(slab_alloc_t* alloc)
+{
+#ifdef MEM_DEBUG
+	printf("Cache usage:\n");
+	for (int i = 0; i < SLAB_CACHE_COUNT; ++i) {
+
+		if (!alloc->caches[i])
+			continue;
+
+		slab_cache_t* cache = alloc->caches[i];
+		unsigned free_s = slab_list_walk(cache->slabs_free);
+		unsigned full_s = slab_list_walk(cache->slabs_full);
+		printf("%4zu: allocs=%lu frees=%lu "
+		       "(%u empty+partial, %u full)\n",
+		       cache->bufsize, cache->stat_allocs,
+		       cache->stat_frees, free_s, full_s);
+	}
+#else
+	printf("Cache usage: not available, enable MEM_DEBUG and recompile.\n");
+#endif
+}
+
diff --git a/src/common/slab/slab.h b/src/common/slab/slab.h
new file mode 100644
index 0000000..d64188e
--- /dev/null
+++ b/src/common/slab/slab.h
@@ -0,0 +1,353 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file slab.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief SLAB allocator.
+ *
+ * SLAB cache works with either custom SLAB sizes and
+ * Next-Highest-Power-Of-2 sizes.
+ *
+ * Slab size is a multiple of PAGE_SIZE and uses
+ * system allocator for larger blocks.
+ *
+ * Allocated SLABs are PAGE_SIZE aligned for a fast O(1)
+ * address-from-item lookup. This results in nearly none memory
+ * overhead for a very small blocks (<64B), but it requires the
+ * underlying allocator to be effective in allocating page size aligned memory
+ * as well. The major disadvantage is that each Slab must be aligned to it's
+ * size as opposed to boundary tags.
+ *
+ * Slab implements simple coloring mechanism to improve
+ * cache line utilisation.
+ *
+ * \ref SLAB_SIZE is a fixed size of a slab. As a rule of thumb, the slab is
+ * effective when the maximum allocated block size is below 1/4 of a SLAB_SIZE.
+ * f.e. 16kB SLAB is most effective up to 4kB block size.
+ *
+ * \ref MEM_POISON flag enables checking read/writes after the allocated memory
+ * and segmentation fault. This poses a significant time and space overhead.
+ * Enable only when debugging.
+ *
+ * \ref MEM_SLAB_CAP defines a maximum limit of a number of empty slabs that a cache
+ * can keep at a time. This results in a slight performance regression,
+ * but actively recycles unuse memory.
+ *
+ * \ref MEM_DEPOT_COUNT defines how many recycled slabs will be cached for a later
+ * use instead of returning them immediately to the OS. This significantly
+ * reduces a number of syscalls in some cases.
+ * f.e. 16 means 16 * SLAB_SIZE cache, for 16kB slabs = 256kB cache
+ *
+ * \ref MEM_COLORING enables simple cache coloring. This is generally a useful
+ *      feature since all slabs are page size aligned and
+ *      (depending on architecture) this slightly improves performance
+ *      and cacheline usage at the cost of a minimum of 64 bytes per slab of
+ *      overhead. Undefine MEM_COLORING in common.h to disable coloring.
+ *
+ * Optimal usage for a specific behavior (similar allocation sizes):
+ * \code
+ * slab_cache_t cache;
+ * slab_cache_init(&cache, N); // Initialize, N means cache chunk size
+ * ...
+ * void* mem = slab_cache_alloc(&cache); // Allocate N bytes
+ * ...
+ * slab_free(mem); // Recycle memory
+ * ...
+ * slab_cache_destroy(&cache); // Deinitialize cache
+ * \endcode
+ *
+ *
+ * \todo Allocate slab headers elsewhere and use just first sizeof(void*) bytes
+ *       in each slab as a pointer to slab header. This could improve the
+ *       performance.
+ *
+ * \note Slab allocation is not thread safe for performance reasons.
+ *
+ * \addtogroup alloc
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_SLAB_H_
+#define _KNOTD_COMMON_SLAB_H_
+
+#include <pthread.h>
+#include <stdint.h>
+
+/* Constants. */
+#define SLAB_SIZE (4096*4) //!< Slab size (16K blocks)
+#define SLAB_MIN_BUFLEN 8  //!< Minimal allocation block size is 8B.
+#define SLAB_EXP_OFFSET 3  //!< Minimal allocation size is 8B = 2^3, exp is 3.
+#define SLAB_GP_COUNT  10  //!< General-purpose caches count.
+#define SLAB_US_COUNT  10  //!< User-specified caches count.
+#define SLAB_DEPOT_SIZE 16 //!< N slabs cached = N*SLAB_SIZE kB cap
+#define SLAB_CACHE_COUNT (SLAB_GP_COUNT + SLAB_US_COUNT) //!< Slab cache count.
+struct slab_cache_t;
+
+/* Macros. */
+
+/*! \brief Return slab base address from pointer. */
+#define slab_from_ptr(p) ((void*)((size_t)(p) & SLAB_MASK))
+
+/*! \brief Return true if slab is empty. */
+#define slab_isempty(s) ((s)->bufs_free == (s)->bufs_count)
+
+/*!
+ * \brief Slab descriptor.
+ *
+ * Slab is a block of memory used for an allocation of
+ * smaller objects (bufs) later on.
+ * Each slab is currently aligned to page size to easily
+ * determine slab address from buf pointer.
+ *
+ * \warning Do not use slab_t directly as it cannot grow, see slab_cache_t.
+ */
+typedef struct slab_t {
+	char magic;                 /*!< Identifies memory block type. */
+	unsigned short bufsize;     /*!< Slab bufsize. */
+	struct slab_cache_t *cache; /*!< Owner cache. */
+	struct slab_t *prev, *next; /*!< Neighbours in slab lists. */
+	unsigned bufs_count;        /*!< Number of bufs in slab. */
+	unsigned bufs_free;         /*!< Number of available bufs. */
+	void **head;                /*!< Pointer to first available buf. */
+	char* base;                 /*!< Base address for bufs. */
+} slab_t;
+
+/*!
+ * \brief Slab depot.
+ *
+ * To mitigate slab initialization costs, depot keeps a finite number of
+ * stacked slabs before returning them to the system.
+ */
+typedef struct slab_depot_t {
+	size_t available;               /*!< Number of available pages. */
+	slab_t* cache[SLAB_DEPOT_SIZE]; /*!< Stack of free slabs. */
+} slab_depot_t;
+
+/*!
+ * \brief Large object descriptor.
+ *
+ * Large object differs from slab with magic byte and
+ * contains object size.
+ *
+ * Magic needs to be first to overlap with slab_t magic byte.
+ */
+typedef struct slab_obj_t {
+	char magic;  /*!< Identifies memory block type. */
+	size_t size; /*!< Object size. */
+} slab_obj_t;
+
+/*!
+ * \brief Slab cache descriptor.
+ *
+ * Slab cache is a list of 0..n slabs with the same buf size.
+ * It is responsible for slab state keeping.
+ *
+ * Once a slab is created, it is moved to free list.
+ * When it is full, it is moved to full list.
+ * Once a buf from full slab is freed, the slab is moved to
+ * free list again (there may be some hysteresis for mitigating
+ * a sequential alloc/free).
+ *
+ * Allocation of new slabs is on-demand, empty slabs are reused if possible.
+ *
+ * \note Slab implementation is different from Bonwick (Usenix 2001)
+ *       http://www.usenix.org/event/usenix01/bonwick.html
+ *       as it doesn't feature empty and partial list.
+ *       This is due to fact, that user space allocator rarely
+ *       needs to count free slabs. There is no way the OS could
+ *       notify the application, that the memory is scarce.
+ *       A slight performance increased is measured in benchmark.
+ *
+ * \note Statistics are only available if MEM_DEBUG is enabled.
+ */
+typedef struct slab_cache_t {
+	unsigned short color;    /*!< Current cache color. */
+	unsigned short empty;    /*!< Number of empty slabs. */
+	size_t bufsize;          /*!< Cache object (buf) size. */
+	slab_t *slabs_free;      /*!< List of free slabs. */
+	slab_t *slabs_full;      /*!< List of full slabs. */
+
+	/* Statistics. */
+	unsigned long stat_allocs; /*!< Allocation count. */
+	unsigned long stat_frees;  /*!< Free count. */
+} slab_cache_t;
+
+/*!
+ * \brief Slab allocator descriptor.
+ *
+ * \note For a number of slab caches, consult SLAB_GP_COUNT
+ *       and a number of specific records in SLAB_CACHE_LUT lookup table.
+ *
+ * \warning It is currently not advised to use this general purpose allocator,
+ *          as it usually doesn't yield an expected performance for higher
+ *          bookkeeping costs and it also depends on the allocation behavior
+ *          as well. Look for slab_cache for a specialized use in most cases.
+ */
+typedef struct slab_alloc_t {
+	slab_cache_t descriptors; /*!< Slab cache for cache descriptors. */
+	slab_cache_t* caches[SLAB_CACHE_COUNT]; /*!< Number of slab caches. */
+} slab_alloc_t;
+
+/*!
+ * \brief Create a slab of predefined size.
+ *
+ * At the moment, slabs are equal to page size and page size aligned.
+ * This enables quick and efficient buf to slab lookup by pointer arithmetic.
+ *
+ * Slab uses simple coloring scheme with and the memory block is always
+ * sizeof(void*) aligned.
+ *
+ * \param cache Parent cache.
+ * \retval Slab instance on success.
+ * \retval NULL on error.
+ */
+slab_t* slab_create(slab_cache_t* cache);
+
+/*!
+ * \brief Destroy slab instance.
+ *
+ * Slab is disconnected from any list and freed.
+ * Dereferenced slab parameter is set to NULL.
+ *
+ * \param slab Pointer to given slab.
+ */
+void slab_destroy(slab_t** slab);
+
+/*!
+ * \brief Allocate a buf from slab.
+ *
+ * Returns a pointer to allocated memory or NULL on error.
+ *
+ * \param slab Given slab instance.
+ * \retval Pointer to allocated memory.
+ * \retval NULL on error.
+ */
+void* slab_alloc(slab_t* slab);
+
+/*!
+ * \brief Recycle memory.
+ *
+ * Given memory is returned to owner slab.
+ * Memory content may be rewritten.
+ *
+ * \param ptr Returned memory.
+ */
+void slab_free(void* ptr);
+
+/*!
+ * \brief Create a slab cache.
+ *
+ * Create a slab cache with no allocated slabs.
+ * Slabs are allocated on-demand.
+ *
+ * \param cache Pointer to uninitialized cache.
+ * \param bufsize Single item size for later allocs.
+ * \retval 0 on success.
+ * \retval -1 on error;
+ */
+int slab_cache_init(slab_cache_t* cache, size_t bufsize);
+
+/*!
+ * \brief Destroy a slab cache.
+ *
+ * Destroy a slab cache and all associated slabs.
+ *
+ * \param cache Pointer to slab cache.
+ */
+void slab_cache_destroy(slab_cache_t* cache);
+
+/*!
+ * \brief Allocate from the cache.
+ *
+ * It tries to use partially free caches first,
+ * empty caches second and allocates a new cache
+ * as a last resort.
+ *
+ * \param cache Given slab cache.
+ * \retval Pointer to allocated memory.
+ * \retval NULL on error.
+ */
+void* slab_cache_alloc(slab_cache_t* cache);
+
+/*!
+ * \brief Free unused slabs from cache.
+ *
+ * \param cache Given slab cache.
+ * \return Number of freed slabs.
+ */
+int slab_cache_reap(slab_cache_t* cache);
+
+/*!
+ * \brief Create a general purpose slab allocator.
+ *
+ * \note Please consult struct slab_alloc_t for performance hints.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int slab_alloc_init(slab_alloc_t* alloc);
+
+/*!
+ * \brief Delete slab allocator.
+ *
+ * This destroys all associated caches and frees memory.
+ *
+ * \param alloc Given allocator instance.
+ */
+void slab_alloc_destroy(slab_alloc_t* alloc);
+
+/*!
+ * \brief Allocate a block of memory.
+ *
+ * Returns a block of allocated memory.
+ *
+ * \note At least SLAB_MIN_BUFSIZE bytes is allocated.
+ *
+ * \note Please consult struct slab_alloc_t for performance hints.
+ *
+ * \param alloc Allocator instance.
+ * \param size Requested block size.
+ * \retval Pointer to allocated memory.
+ * \retval NULL on error.
+ */
+void* slab_alloc_alloc(slab_alloc_t* alloc, size_t size);
+
+/*!
+ * \brief Reallocate data from one slab to another.
+ *
+ * \param alloc Allocator instance.
+ * \param ptr Pointer to allocated memory.
+ * \param size Requested memory block size.
+ * \retval Pointer to newly allocated memory.
+ * \retval NULL on error.
+ *
+ * \todo Realloc could be probably implement more effectively.
+ */
+void *slab_alloc_realloc(slab_alloc_t* alloc, void *ptr, size_t size);
+
+/*!
+ *
+ * \brief Dump allocator stats.
+ *
+ * \param alloc Allocator instance.
+ */
+void slab_alloc_stats(slab_alloc_t* alloc);
+
+#endif /* _KNOTD_COMMON_SLAB_H_ */
+
+/*! @} */
diff --git a/src/common/sockaddr.c b/src/common/sockaddr.c
new file mode 100644
index 0000000..cd3a4b9
--- /dev/null
+++ b/src/common/sockaddr.c
@@ -0,0 +1,174 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include "common/sockaddr.h"
+
+int sockaddr_init(sockaddr_t *addr, int af)
+{
+	/* Reset pointer. */
+	memset(addr, 0, sizeof(sockaddr_t));
+	addr->family = -1;
+
+	/* Initialize address size. */
+	switch(af) {
+	case AF_INET:
+		addr->len = sizeof(struct sockaddr_in);
+		break;
+#ifndef DISABLE_IPV6
+	case AF_INET6:
+		addr->len = sizeof(struct sockaddr_in6);
+		break;
+#endif
+	default:
+		return -1;
+	}
+
+	/* Update pointer. */
+	addr->family = af;
+	return sockaddr_update(addr);
+}
+
+int sockaddr_update(sockaddr_t *addr)
+{
+	/* Update internal pointer. */
+	switch(addr->len) {
+	case sizeof(struct sockaddr_in):
+		addr->ptr = (struct sockaddr*)&addr->addr4;
+		break;
+#ifndef DISABLE_IPV6
+	case sizeof(struct sockaddr_in6):
+		addr->ptr = (struct sockaddr*)&addr->addr6;
+		break;
+#endif
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+int sockaddr_set(sockaddr_t *dst, int family, const char* addr, int port)
+{
+	if (!dst || !addr || port < 0) {
+		return -1;
+	}
+
+	/* Initialize. */
+	dst->family = -1;
+	dst->ptr = 0;
+	dst->len = 0;
+	sockaddr_init(dst, family);
+
+	/* Initialize depending on address family. */
+	void *paddr = 0;
+	switch(family) {
+	case AF_INET:
+		dst->addr4.sin_family = family;
+		dst->addr4.sin_port = htons(port);
+		paddr = &dst->addr4.sin_addr;
+		dst->addr4.sin_addr.s_addr = INADDR_ANY;
+		break;
+#ifndef DISABLE_IPV6
+	case AF_INET6:
+		dst->addr6.sin6_family = family;
+		dst->addr6.sin6_port = htons(port);
+		paddr = &dst->addr6.sin6_addr;
+		memcpy(&dst->addr6.sin6_addr,
+		       &in6addr_any, sizeof(in6addr_any));
+		break;
+#endif
+	default:
+		return -1;
+	}
+
+	/* Convert address. */
+	return inet_pton(family, addr, paddr);
+}
+
+int sockaddr_tostr(sockaddr_t *addr, char *dst, size_t size)
+{
+	if (!addr || !dst || size == 0) {
+		return -1;
+	}
+
+	/* Minimum length. */
+	size_t minlen = INET_ADDRSTRLEN;
+
+	/* Check unsupported IPv6. */
+#ifdef DISABLE_IPV6
+	if (addr->family == AF_INET6) {
+		return -1;
+	}
+#else
+	minlen = INET6_ADDRSTRLEN;
+#endif
+
+	/* Check minimum length. */
+	if (size < minlen) {
+		return -1;
+	}
+
+	/* Convert. */
+#ifdef DISABLE_IPV6
+	dst[0] = '\0';
+#else
+	/* Load IPv6 addr if default. */
+	if (addr->family == AF_INET6) {
+		inet_ntop(addr->family, &addr->addr6.sin6_addr,
+			  dst, size);
+	}
+#endif
+	/* Load IPv4 if set. */
+	if (addr->family == AF_INET) {
+		inet_ntop(addr->family, &addr->addr4.sin_addr,
+			  dst, size);
+	}
+
+	return 0;
+}
+
+int sockaddr_portnum(sockaddr_t *addr)
+{
+	if (!addr) {
+		return -1;
+	}
+
+	switch(addr->family) {
+
+	/* IPv4 */
+	case AF_INET:
+		return ntohs(addr->addr4.sin_port);
+		break;
+
+	/* IPv6 */
+#ifndef DISABLE_IPV6
+	case AF_INET6:
+		return ntohs(addr->addr6.sin6_port);
+		break;
+#endif
+
+	/* N/A */
+	default:
+		return -1;
+		break;
+	}
+}
diff --git a/src/common/sockaddr.h b/src/common/sockaddr.h
new file mode 100644
index 0000000..51ba779
--- /dev/null
+++ b/src/common/sockaddr.h
@@ -0,0 +1,120 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file sockaddr.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Socket address abstraction layer.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_SOCKADDR_H_
+#define _KNOTD_SOCKADDR_H_
+
+/* BSD IPv6 */
+#ifndef __POSIX_VISIBLE
+#define __POSIX_VISIBLE = 200112
+#endif
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*! \brief Universal socket address. */
+typedef struct sockaddr_t {
+	int family; /*!< Address family. */
+	struct sockaddr* ptr; /*!< Pointer to used sockaddr. */
+	socklen_t len;              /*!< Length of used sockaddr. */
+	union {
+		struct sockaddr_in addr4; /*!< IPv4 sockaddr. */
+#ifndef DISABLE_IPV6
+		struct sockaddr_in6 addr6; /*!< IPv6 sockaddr. */
+#endif
+	};
+} sockaddr_t;
+
+/*! \brief Maximum address length in string format. */
+#ifdef DISABLE_IPV6
+#define SOCKADDR_STRLEN INET_ADDRSTRLEN
+#else
+#define SOCKADDR_STRLEN INET6_ADDRSTRLEN
+#endif
+
+/*!
+ * \brief Initialize address structure.
+ *
+ * Members ptr and len will be initialized to correct address family.
+ *
+ * \param addr Socket address structure.
+ * \param af Requested address family.
+ *
+ * \retval 0 on success.
+ * \retval -1 on unsupported address family (probably INET6).
+ */
+int sockaddr_init(sockaddr_t *addr, int af);
+
+/*!
+ * \brief Update internal pointers according to length.
+ *
+ * \param addr Socket address structure.
+ *
+ * \retval 0 on success.
+ * \retval -1 on invalid size.
+ */
+int sockaddr_update(sockaddr_t *addr);
+
+/*!
+ * \brief Set address and port.
+ *
+ * \param dst Target address structure.
+ * \param family Address family.
+ * \param addr IP address in string format.
+ * \param port Port.
+ *
+ * \retval 0 if addr is not valid address in string format.
+ * \retval positive value in case of success.
+ * \retval -1 on error.
+ * \see inet_pton(3)
+ */
+int sockaddr_set(sockaddr_t *dst, int family, const char* addr, int port);
+
+/*!
+ * \brief Return string representation of socket address.
+ *
+ * \param addr Socket address structure.
+ * \param dst Destination for string representation.
+ * \param size Maximum number of written bytes.
+ *
+ * \retval 0 on success.
+ * \retval -1 on invalid parameters.
+ */
+int sockaddr_tostr(sockaddr_t *addr, char *dst, size_t size);
+
+/*!
+ * \brief Return port number from address.
+ *
+ * \param addr Socket address structure.
+ *
+ * \retval Port number on success.
+ * \retval -1 on errors.
+ */
+int sockaddr_portnum(sockaddr_t *addr);
+
+#endif /* _KNOTD_SOCKADDR_H_ */
+
+/*! @} */
diff --git a/src/common/tree.h b/src/common/tree.h
new file mode 100644
index 0000000..efea65b
--- /dev/null
+++ b/src/common/tree.h
@@ -0,0 +1,268 @@
+/* tree.h -- AVL trees (in the spirit of BSD's 'queue.h')	-*- C -*-	*/
+
+/* Copyright (c) 2005 Ian Piumarta
+ * 
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the 'Software'), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * provided that the above copyright notice(s) and this permission notice appear
+ * in all copies of the Software and that both the above copyright notice(s) and
+ * this permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS'.  USE ENTIRELY AT YOUR OWN RISK.
+ */
+
+/* This file defines an AVL balanced binary tree [Georgii M. Adelson-Velskii and
+ * Evgenii M. Landis, 'An algorithm for the organization of information',
+ * Doklady Akademii Nauk SSSR, 146:263-266, 1962 (Russian).  Also in Myron
+ * J. Ricci (trans.), Soviet Math, 3:1259-1263, 1962 (English)].
+ * 
+ * An AVL tree is headed by pointers to the root node and to a function defining
+ * the ordering relation between nodes.  Each node contains an arbitrary payload
+ * plus three fields per tree entry: the depth of the subtree for which it forms
+ * the root and two pointers to child nodes (singly-linked for minimum space, at
+ * the expense of direct access to the parent node given a pointer to one of the
+ * children).  The tree is rebalanced after every insertion or removal.  The
+ * tree may be traversed in two directions: forward (in-order left-to-right) and
+ * reverse (in-order, right-to-left).
+ * 
+ * Because of the recursive nature of many of the operations on trees it is
+ * necessary to define a number of helper functions for each type of tree node.
+ * The macro TREE_DEFINE(node_tag, entry_name) defines these functions with
+ * unique names according to the node_tag.  This macro should be invoked,
+ * thereby defining the necessary functions, once per node tag in the program.
+ * 
+ * For details on the use of these macros, see the tree(3) manual page.
+ */
+
+/* Downloaded from http://piumarta.com/software/tree/ */
+
+#ifndef __tree_h
+#define __tree_h
+
+
+#define TREE_DELTA_MAX	1
+
+#define TREE_ENTRY(type)			\
+  struct {					\
+    struct type	*avl_left;			\
+    struct type	*avl_right;			\
+    int		 avl_height;			\
+  }
+
+#define TREE_HEAD(name, type)				\
+  struct name {						\
+    struct type *th_root;				\
+    int  (*th_cmp)(struct type *lhs, struct type *rhs);	\
+  }
+
+#define TREE_INITIALIZER(cmp) { 0, cmp }
+
+#define TREE_DELTA(self, field)								\
+  (( (((self)->field.avl_left)  ? (self)->field.avl_left->field.avl_height  : 0))	\
+   - (((self)->field.avl_right) ? (self)->field.avl_right->field.avl_height : 0))
+
+/* Recursion prevents the following from being defined as macros. */
+
+#define TREE_DEFINE(node, field)									\
+													\
+  struct node *TREE_BALANCE_##node##_##field(struct node *);						\
+													\
+  struct node *TREE_ROTL_##node##_##field(struct node *self)						\
+  {													\
+    struct node *r= self->field.avl_right;								\
+    self->field.avl_right= r->field.avl_left;								\
+    r->field.avl_left= TREE_BALANCE_##node##_##field(self);						\
+    return TREE_BALANCE_##node##_##field(r);								\
+  }													\
+													\
+  struct node *TREE_ROTR_##node##_##field(struct node *self)						\
+  {													\
+    struct node *l= self->field.avl_left;								\
+    self->field.avl_left= l->field.avl_right;								\
+    l->field.avl_right= TREE_BALANCE_##node##_##field(self);						\
+    return TREE_BALANCE_##node##_##field(l);								\
+  }													\
+													\
+  struct node *TREE_BALANCE_##node##_##field(struct node *self)						\
+  {													\
+    int delta= TREE_DELTA(self, field);									\
+													\
+    if (delta < -TREE_DELTA_MAX)									\
+      {													\
+	if (TREE_DELTA(self->field.avl_right, field) > 0)						\
+	  self->field.avl_right= TREE_ROTR_##node##_##field(self->field.avl_right);			\
+	return TREE_ROTL_##node##_##field(self);							\
+      }													\
+    else if (delta > TREE_DELTA_MAX)									\
+      {													\
+	if (TREE_DELTA(self->field.avl_left, field) < 0)						\
+	  self->field.avl_left= TREE_ROTL_##node##_##field(self->field.avl_left);			\
+	return TREE_ROTR_##node##_##field(self);							\
+      }													\
+    self->field.avl_height= 0;										\
+    if (self->field.avl_left && (self->field.avl_left->field.avl_height > self->field.avl_height))	\
+      self->field.avl_height= self->field.avl_left->field.avl_height;					\
+    if (self->field.avl_right && (self->field.avl_right->field.avl_height > self->field.avl_height))	\
+      self->field.avl_height= self->field.avl_right->field.avl_height;					\
+    self->field.avl_height += 1;									\
+    return self;											\
+  }													\
+													\
+  struct node *TREE_INSERT_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(struct node *lhs, struct node *rhs))		\
+  {													\
+    if (!self)												\
+      return elm;											\
+    if (compare(elm, self) < 0)										\
+      self->field.avl_left= TREE_INSERT_##node##_##field(self->field.avl_left, elm, compare);		\
+    else												\
+      self->field.avl_right= TREE_INSERT_##node##_##field(self->field.avl_right, elm, compare);		\
+    return TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  struct node *TREE_FIND_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(struct node *lhs, struct node *rhs))		\
+  {													\
+    if (!self)												\
+      return 0;												\
+    if (compare(elm, self) == 0)									\
+      return self;											\
+    if (compare(elm, self) < 0)										\
+      return TREE_FIND_##node##_##field(self->field.avl_left, elm, compare);				\
+    else												\
+      return TREE_FIND_##node##_##field(self->field.avl_right, elm, compare);				\
+  }													\
+													\
+  int TREE_FIND_LESS_EQUAL_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(struct node *lhs, struct node *rhs), struct node **found, struct node **prev)		\
+  {													\
+    if (!self)												\
+      return 0;												\
+    if (compare(elm, self) == 0) {									\
+      *found = self;											\
+      return 1;												\
+    }													\
+    if (compare(elm, self) < 0) {										\
+      int ret = TREE_FIND_LESS_EQUAL_##node##_##field(self->field.avl_left, elm, compare, found, prev);	\
+      if (ret == 0 && *prev == NULL) {									\
+        *prev = self;											\
+        ret = -1;											\
+      }													\
+      return ret;											\
+    } else {												\
+      *found = self;											\
+      *prev = self;											\
+      return TREE_FIND_LESS_EQUAL_##node##_##field(self->field.avl_right, elm, compare, found, prev);			\
+    }													\
+  }													\
+													\
+  struct node *TREE_MOVE_RIGHT_##node##_##field(struct node *self, struct node *rhs)					\
+  {													\
+    if (!self)												\
+      return rhs;											\
+    self->field.avl_right= TREE_MOVE_RIGHT_##node##_##field(self->field.avl_right, rhs);					\
+    return TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  struct node *TREE_REMOVE_##node##_##field								\
+    (struct node *self, struct node *elm, int (*compare)(struct node *lhs, struct node *rhs))		\
+  {													\
+    if (!self) return 0;										\
+													\
+    if (compare(elm, self) == 0)									\
+      {													\
+	struct node *tmp= TREE_MOVE_RIGHT_##node##_##field(self->field.avl_left, self->field.avl_right);			\
+	self->field.avl_left= 0;									\
+	self->field.avl_right= 0;									\
+	return tmp;											\
+      }													\
+    if (compare(elm, self) < 0)										\
+      self->field.avl_left= TREE_REMOVE_##node##_##field(self->field.avl_left, elm, compare);		\
+    else												\
+      self->field.avl_right= TREE_REMOVE_##node##_##field(self->field.avl_right, elm, compare);		\
+    return TREE_BALANCE_##node##_##field(self);								\
+  }													\
+													\
+  void TREE_FORWARD_APPLY_ALL_##node##_##field								\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	TREE_FORWARD_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+	function(self, data);										\
+	TREE_FORWARD_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+      }													\
+  }													\
+													\
+  void TREE_REVERSE_APPLY_ALL_##node##_##field								\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	TREE_REVERSE_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+	function(self, data);										\
+	TREE_REVERSE_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+      }													\
+  }													\
+													\
+  void TREE_POST_ORDER_APPLY_ALL_##node##_##field							\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+	TREE_POST_ORDER_APPLY_ALL_##node##_##field(self->field.avl_left, function, data);			\
+	TREE_POST_ORDER_APPLY_ALL_##node##_##field(self->field.avl_right, function, data);			\
+	function(self, data);										\
+      }													\
+  }													\
+													\
+  void TREE_REVERSE_APPLY_POST_ALL_##node##_##field								\
+    (struct node *self, void (*function)(struct node *node, void *data), void *data)			\
+  {													\
+    if (self)												\
+      {													\
+        TREE_REVERSE_APPLY_POST_ALL_##node##_##field(self->field.avl_right, function, data);			\
+        TREE_REVERSE_APPLY_POST_ALL_##node##_##field(self->field.avl_left, function, data);			\
+        function(self, data);										\
+      }													\
+}
+
+#define TREE_INSERT(head, node, field, elm)						\
+  ((head)->th_root= TREE_INSERT_##node##_##field((head)->th_root, (elm), (head)->th_cmp))
+
+#define TREE_FIND(head, node, field, elm)				\
+  (TREE_FIND_##node##_##field((head)->th_root, (elm), (head)->th_cmp))
+
+#define TREE_FIND_LESS_EQUAL(head, node, field, elm, found, prev)				\
+  (TREE_FIND_LESS_EQUAL_##node##_##field((head)->th_root, (elm), (head)->th_cmp, found, prev))
+
+#define TREE_REMOVE(head, node, field, elm)						\
+  ((head)->th_root= TREE_REMOVE_##node##_##field((head)->th_root, (elm), (head)->th_cmp))
+
+#define TREE_DEPTH(head, field)			\
+  ((head)->th_root->field.avl_height)
+
+#define TREE_FORWARD_APPLY(head, node, field, function, data)	\
+  TREE_FORWARD_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define TREE_REVERSE_APPLY(head, node, field, function, data)	\
+  TREE_REVERSE_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define TREE_POST_ORDER_APPLY(head, node, field, function, data)	\
+  TREE_POST_ORDER_APPLY_ALL_##node##_##field((head)->th_root, function, data)
+
+#define TREE_REVERSE_APPLY_POST(head, node, field, function, data)	\
+  TREE_REVERSE_APPLY_POST_ALL_##node##_##field((head)->th_root, function, data)
+
+#define TREE_INIT(head, cmp) do {		\
+    (head)->th_root= 0;				\
+    (head)->th_cmp= (cmp);			\
+  } while (0)
+
+
+#endif /* __tree_h */
diff --git a/src/config.h.in b/src/config.h.in
new file mode 100644
index 0000000..521adb8
--- /dev/null
+++ b/src/config.h.in
@@ -0,0 +1,307 @@
+/* src/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Enable brief debugging messages. */
+#undef DEBUG_ENABLE_BRIEF
+
+/* Enable details debugging messages. */
+#undef DEBUG_ENABLE_DETAILS
+
+/* Enable verbose debugging messages. */
+#undef DEBUG_ENABLE_VERBOSE
+
+/* recvmmsg enabled */
+#undef ENABLE_RECVMMSG
+
+/* Define to 1 if you have the <arpa/inet.h> header file. */
+#undef HAVE_ARPA_INET_H
+
+/* Define to 1 if you have the <arpa/nameser.h> header file. */
+#undef HAVE_ARPA_NAMESER_H
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the `epoll_wait' function. */
+#undef HAVE_EPOLL_WAIT
+
+/* Define to 1 if you have the <ev.h> header file. */
+#undef HAVE_EV_H
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#undef HAVE_FCNTL_H
+
+/* Define to 1 if you have the `fork' function. */
+#undef HAVE_FORK
+
+/* Define to 1 if you have the `gethostbyname' function. */
+#undef HAVE_GETHOSTBYNAME
+
+/* Define to 1 if you have the `getpagesize' function. */
+#undef HAVE_GETPAGESIZE
+
+/* Define to 1 if you have the `gettimeofday' function. */
+#undef HAVE_GETTIMEOFDAY
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the `kqueue' function. */
+#undef HAVE_KQUEUE
+
+/* ldns present */
+#undef HAVE_LDNS
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define to 1 if you have the `memmove' function. */
+#undef HAVE_MEMMOVE
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the `memset' function. */
+#undef HAVE_MEMSET
+
+/* Define to 1 if you have a working `mmap' system call. */
+#undef HAVE_MMAP
+
+/* Support mmx instructions */
+#undef HAVE_MMX
+
+/* Define to 1 if you have the `munmap' function. */
+#undef HAVE_MUNMAP
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#undef HAVE_NETDB_H
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
+
+/* Define to 1 if you have the `poll' function. */
+#undef HAVE_POLL
+
+/* Define to 1 if you have the `regcomp' function. */
+#undef HAVE_REGCOMP
+
+/* Define to 1 if you have the <resolv.h> header file. */
+#undef HAVE_RESOLV_H
+
+/* Define to 1 if you have the `select' function. */
+#undef HAVE_SELECT
+
+/* Define to 1 if you have the `socket' function. */
+#undef HAVE_SOCKET
+
+/* Define to 1 if you have the `sqrt' function. */
+#undef HAVE_SQRT
+
+/* Support SSE (Streaming SIMD Extensions) instructions */
+#undef HAVE_SSE
+
+/* Support SSE2 (Streaming SIMD Extensions 2) instructions */
+#undef HAVE_SSE2
+
+/* Support SSE3 (Streaming SIMD Extensions 3) instructions */
+#undef HAVE_SSE3
+
+/* Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions */
+#undef HAVE_SSSE3
+
+/* Define to 1 if stdbool.h conforms to C99. */
+#undef HAVE_STDBOOL_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `strcasecmp' function. */
+#undef HAVE_STRCASECMP
+
+/* Define to 1 if you have the `strchr' function. */
+#undef HAVE_STRCHR
+
+/* Define to 1 if you have the `strdup' function. */
+#undef HAVE_STRDUP
+
+/* Define to 1 if you have the `strerror' function. */
+#undef HAVE_STRERROR
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strncasecmp' function. */
+#undef HAVE_STRNCASECMP
+
+/* Define to 1 if you have the `strtol' function. */
+#undef HAVE_STRTOL
+
+/* Define to 1 if you have the `strtoul' function. */
+#undef HAVE_STRTOUL
+
+/* Define to 1 if you have the <syslog.h> header file. */
+#undef HAVE_SYSLOG_H
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#undef HAVE_SYS_SOCKET_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/time.h> header file. */
+#undef HAVE_SYS_TIME_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the <urcu.h> header file. */
+#undef HAVE_URCU_H
+
+/* Define to 1 if you have the `vfork' function. */
+#undef HAVE_VFORK
+
+/* Define to 1 if you have the <vfork.h> header file. */
+#undef HAVE_VFORK_H
+
+/* Define to 1 if `fork' works. */
+#undef HAVE_WORKING_FORK
+
+/* Define to 1 if `vfork' works. */
+#undef HAVE_WORKING_VFORK
+
+/* Define to 1 if the system has the type `_Bool'. */
+#undef HAVE__BOOL
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to 1 if `lex' declares `yytext' as a `char *' by default, not a
+   `char[]'. */
+#undef YYTEXT_POINTER
+
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+#undef _POSIX_1_SOURCE
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
+/* Define for Solaris 2.5.1 so the uint32_t typedef from <sys/synch.h>,
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
+   #define below would cause a syntax error. */
+#undef _UINT32_T
+
+/* Define for Solaris 2.5.1 so the uint64_t typedef from <sys/synch.h>,
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
+   #define below would cause a syntax error. */
+#undef _UINT64_T
+
+/* Define for Solaris 2.5.1 so the uint8_t typedef from <sys/synch.h>,
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
+   #define below would cause a syntax error. */
+#undef _UINT8_T
+
+/* Define to `__inline__' or `__inline' if that's what the C compiler
+   calls it, or to nothing if 'inline' is not supported under any name.  */
+#ifndef __cplusplus
+#undef inline
+#endif
+
+/* Define to the type of a signed integer type of width exactly 64 bits if
+   such a type exists and the standard includes do not define it. */
+#undef int64_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef pid_t
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef ssize_t
+
+/* Define to the type of an unsigned integer type of width exactly 16 bits if
+   such a type exists and the standard includes do not define it. */
+#undef uint16_t
+
+/* Define to the type of an unsigned integer type of width exactly 32 bits if
+   such a type exists and the standard includes do not define it. */
+#undef uint32_t
+
+/* Define to the type of an unsigned integer type of width exactly 64 bits if
+   such a type exists and the standard includes do not define it. */
+#undef uint64_t
+
+/* Define to the type of an unsigned integer type of width exactly 8 bits if
+   such a type exists and the standard includes do not define it. */
+#undef uint8_t
+
+/* Define as `fork' if `vfork' does not work. */
+#undef vfork
diff --git a/src/knot/common.h b/src/knot/common.h
new file mode 100644
index 0000000..e9cfce1
--- /dev/null
+++ b/src/knot/common.h
@@ -0,0 +1,133 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file common.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Common macros, includes and utilities.
+ *
+ * \addtogroup utils
+ * @{
+ */
+
+#ifndef _KNOTD_COMMON_H_
+#define _KNOTD_COMMON_H_
+
+#include <signal.h>
+#include <stdint.h>
+#include <config.h>
+
+/*
+ * Common types and constants.
+ */
+
+#ifndef UINT_DEFINED
+typedef unsigned int uint; /*!< \brief Unsigned. */
+#define UINT_DEFINED
+#endif
+
+#define PROJECT_EXEC SBINDIR "/" "knotd" /*!< \brief  Project executable. */
+#define ZONEPARSER_EXEC LIBEXECDIR "/" "knot-zcompile" /*!< \brief  Zoneparser executable. */
+#define PID_FILE "knot.pid" /*!< \brief Server PID file name. */
+
+/*
+ * Server.
+ */
+
+#define CPU_ESTIMATE_MAGIC 0 /*!< \brief Extra threads to the number of cores.*/
+#define DEFAULT_THR_COUNT 2  /*!< \brief Default thread count. */
+#define DEFAULT_PORT 53531   /*!< \brief Default interface port. */
+#define TCP_BACKLOG_SIZE 5   /*!< \brief TCP listen backlog size. */
+#define XFR_THREADS_COUNT 3  /*!< \brief Number of threads for XFR handler. */
+#define RECVMMSG_BATCHLEN 32 /*!< \brief Define for recvmmsg() batch size. */
+
+///*! \brief If defined, zone structures will use hash table for lookup. */
+//#define COMPRESSION_PEDANTIC
+
+///*!
+// * \brief If defined, tests will use ldns library to parse sample data.
+// *
+// * If not defined, some tests will be disabled.
+// */
+//#define TEST_WITH_LDNS
+
+///*! \brief If defined, the statistics module will be enabled. */
+//#define STAT_COMPILE
+
+
+#ifdef HAVE_LDNS
+#define TEST_WITH_LDNS
+#endif
+
+/*
+ * Common includes.
+ */
+
+#include "common/latency.h"
+#include "common/print.h"
+#include "knot/other/log.h"
+#include "knot/other/debug.h"
+
+/*! \brief Eliminate compiler warning with unused parameters. */
+#define UNUSED(param) (void)(param)
+
+/*! \brief Type-safe minimum macro. */
+#define MIN(a, b) \
+	({ typeof (a) _a = (a); typeof (b) _b = (b); _a < _b ? _a : _b; })
+
+/*! \brief Type-safe maximum macro. */
+#define MAX(a, b) \
+	({ typeof (a) _a = (a); typeof (b) _b = (b); _a > _b ? _a : _b; })
+
+/* Optimisation macros. */
+#ifndef likely
+/*! \brief Optimize for x to be true value. */
+#define likely(x)       __builtin_expect((x),1)
+#endif
+#ifndef unlikely
+/*! \brief Optimize for x to be false value. */
+#define unlikely(x)     __builtin_expect((x),0)
+#endif
+
+/*! \todo Refactor theese. We should have an allocator function handling this.*/
+#ifndef ERR_ALLOC_FAILED
+#define ERR_ALLOC_FAILED fprintf(stderr, "Allocation failed at %s:%d (%s)\n", \
+				 __FILE__, __LINE__, PACKAGE_STRING)
+#endif
+
+#ifndef CHECK_ALLOC_LOG
+#define CHECK_ALLOC_LOG(var, ret) \
+	do { \
+		if ((var) == NULL) { \
+			ERR_ALLOC_FAILED; \
+			return (ret); \
+		} \
+	} while (0)
+#endif
+
+#ifndef CHECK_ALLOC
+#define CHECK_ALLOC(var, ret) \
+	do { \
+		if ((var) == NULL) { \
+			return (ret); \
+		} \
+	} while (0)
+#endif
+
+#endif /* _KNOTD_COMMON_H_ */
+
+/*! @} */
diff --git a/src/knot/conf/cf-lex.l b/src/knot/conf/cf-lex.l
new file mode 100644
index 0000000..97ac8f8
--- /dev/null
+++ b/src/knot/conf/cf-lex.l
@@ -0,0 +1,218 @@
+/*!
+ * \file cf-lex.l
+ *
+ * \author Ondrej Sury <ondrej.sury@nic.cz>
+ *
+ * \brief Server configuration structures and API.
+ *
+ * IP address conversions from BIRD, (c) 1998--2000 Martin Mares <mj@ucw.cz>
+ */
+%{
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "common/sockaddr.h"
+#include "knot/conf/conf.h"
+#include "knot/other/log.h"
+#include "libknotd_la-cf-parse.h" /* Automake generated header. */
+
+/* Imported symbols. */
+#define lval (yylval->tok)
+extern void cf_error(void *scanner, const char *msg);
+extern int (*cf_read_hook)(char *buf, size_t nbytes);
+void switch_input(const char *str, void *scanner)
+{
+	yy_scan_string(str, scanner);
+}
+
+//#define YY_INPUT(buf,result,max) result = cf_read_hook(buf, max);
+#define YY_NO_UNPUT
+
+%}
+
+%option reentrant
+%option bison-bridge
+%option noyywrap
+%option noinput
+%option nounput
+%option noreject
+%option yylineno
+%option prefix = "cf_"
+%option outfile = "lex.yy.c"
+
+ALPHA [a-zA-Z_]
+DIGIT [0-9]
+HEXA  [0-9a-fA-F]
+ALNUM [a-zA-Z_0-9]
+BLANK [ \t\n]
+
+%%
+\#.*\n          /* Ignore comments */;
+{BLANK}+        /* Ignore whitespace */;
+:		/* Optional : in assignments. */;
+[\!\$\%\^\&\*\(\)\/\+\-\@\{\}\;\,] { return yytext[0]; }
+system          { lval.t = yytext;  return SYSTEM; }
+identity        { lval.t = yytext; return IDENTITY; }
+version         { lval.t = yytext; return VERSION; }
+storage         { lval.t = yytext; return STORAGE; }
+key             { lval.t = yytext; return KEY; }
+keys            { lval.t = yytext; return KEYS; }
+remotes         { lval.t = yytext; return REMOTES; }
+
+zones           { lval.t = yytext; return ZONES; }
+file            { lval.t = yytext; return FILENAME; }
+semantic-checks { lval.t = yytext; return SEMANTIC_CHECKS; }
+notify-retries  { lval.t = yytext; return NOTIFY_RETRIES; }
+notify-timeout  { lval.t = yytext; return NOTIFY_TIMEOUT; }
+zonefile-sync   { lval.t = yytext; return DBSYNC_TIMEOUT; }
+ixfr-fslimit    { lval.t = yytext; return IXFR_FSLIMIT; }
+xfr-in          { lval.t = yytext; return XFR_IN; }
+xfr-out         { lval.t = yytext; return XFR_OUT; }
+notify-in       { lval.t = yytext; return NOTIFY_IN; }
+notify-out      { lval.t = yytext; return NOTIFY_OUT; }
+workers         { lval.t = yytext; return WORKERS; }
+
+interfaces      { lval.t = yytext; return INTERFACES; }
+address         { lval.t = yytext; return ADDRESS; }
+port            { lval.t = yytext; return PORT; }
+
+log             { lval.t = yytext; return LOG; }
+
+any { lval.t = yytext; lval.i = LOG_ANY; return LOG_SRC; }
+server { lval.t = yytext; lval.i = LOG_SERVER; return LOG_SRC; }
+answering { lval.t = yytext; lval.i = LOG_ANSWER; return LOG_SRC; }
+zone { lval.t = yytext; lval.i = LOG_ZONE; return LOG_SRC; }
+stdout { lval.t = yytext; lval.i = LOGT_STDOUT; return LOG_DEST; }
+stderr { lval.t = yytext; lval.i = LOGT_STDERR; return LOG_DEST; }
+syslog { lval.t = yytext; lval.i = LOGT_SYSLOG; return LOG_DEST; }
+all { lval.t = yytext; lval.i = LOG_UPTO(LOG_DEBUG); return LOG_LEVEL; }
+debug { lval.t = yytext; lval.i = LOG_MASK(LOG_DEBUG); return LOG_LEVEL; }
+info { lval.t = yytext; lval.i = LOG_MASK(LOG_INFO); return LOG_LEVEL; }
+notice { lval.t = yytext; lval.i = LOG_MASK(LOG_NOTICE); return LOG_LEVEL; }
+warning { lval.t = yytext; lval.i = LOG_MASK(LOG_WARNING); return LOG_LEVEL; }
+error { lval.t = yytext; lval.i = LOG_MASK(LOG_ERR); return LOG_LEVEL; }
+
+on|off {
+  lval.t = yytext;
+  lval.i = 0;
+  if (strcmp(yytext, "on") == 0) {
+    lval.i = 1;
+  }
+  return BOOL;
+}
+
+{DIGIT}+[smhd] {
+  size_t mpos = strlen(yytext) - 1;
+  char multiplier = yytext[mpos];
+  yytext[mpos] = '\0';
+  lval.i = atoi(yytext);
+  if (lval.i < 1) {
+	  cf_error(yyscanner, "interval must be a positive integer");
+	  return END;
+  }
+
+  /* Handle multiplier. */
+  switch(multiplier) {
+  case 'm': lval.i *= 60; break; /* minutes */
+  case 'h': lval.i *= 60*60; break; /* hours */
+  case 'd': lval.i *= 24*60*60; break; /* days */
+  case 's': /* seconds */
+  default: break;
+  }
+
+  return INTERVAL;
+}
+
+{DIGIT}+[kMG] {
+  size_t mpos = strlen(yytext) - 1;
+  char multiplier = yytext[mpos];
+  yytext[mpos] = '\0';
+  lval.i = atol(yytext);
+  if (lval.i < 1) {
+	  cf_error(yyscanner, "size must be a positive integer");
+	  return END;
+  }
+
+  /* Handle multiplier. */
+  switch(multiplier) {
+  case 'k': lval.l = lval.i * 1024; break; /* kB */
+  case 'M': lval.l = lval.i * 1024*1024; break; /* MB */
+  case 'G': lval.l = lval.i * 1024*1024*1024; break; /* GB */
+  default: break;
+  }
+
+  return SIZE;
+}
+
+{DIGIT}+ {
+  lval.i = atol(yytext);
+  return NUM;
+}
+
+{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+ {
+  unsigned char buf[sizeof(struct in_addr)];
+  if (inet_pton(AF_INET, yytext, buf)) {
+	  lval.t = strdup(yytext);
+	  return IPA;
+  }
+  cf_error(yyscanner, "Invalid IP address.");
+}
+
+\[({HEXA}*::|({HEXA}*:){3,})({HEXA}*|{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+)\] {
+#ifdef DISABLE_IPV6
+  lval.t = strdup(yytext);
+  cf_error(yyscanner, "IPv6 address support not compiled.");
+  return TEXT;
+#else
+  unsigned char buf[sizeof(struct in6_addr)];
+  yytext[strlen(yytext)-1] = '\0';
+  if (inet_pton(AF_INET6, yytext+1, buf)) {
+	  lval.t = strdup(yytext+1);
+	  return IPA6;
+  }
+  cf_error(yyscanner, "Invalid IPv6 address.");
+#endif
+  }
+
+({HEXA}*::|({HEXA}*:){3,})({HEXA}*|{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+) {
+#ifdef DISABLE_IPV6
+	lval.t = strdup(yytext);
+	cf_error(yyscanner, "IPv6 address support not compiled.");
+	return TEXT;
+#else
+  unsigned char buf[sizeof(struct in6_addr)];
+  if (inet_pton(AF_INET6, yytext, buf)) {
+	  lval.t = strdup(yytext);
+	  return IPA6;
+  }
+  cf_error(yyscanner, "Invalid IPv6 address.");
+#endif
+}
+
+gss-tsig        { lval.alg = KNOT_TSIG_ALG_GSS_TSIG;    return TSIG_ALGO_NAME; }
+hmac-md5        { lval.alg = KNOT_TSIG_ALG_HMAC_MD5;    return TSIG_ALGO_NAME; }
+hmac-sha1       { lval.alg = KNOT_TSIG_ALG_HMAC_SHA1;   return TSIG_ALGO_NAME; }
+hmac-sha224     { lval.alg = KNOT_TSIG_ALG_HMAC_SHA224; return TSIG_ALGO_NAME; }
+hmac-sha256     { lval.alg = KNOT_TSIG_ALG_HMAC_SHA256; return TSIG_ALGO_NAME; }
+hmac-sha384     { lval.alg = KNOT_TSIG_ALG_HMAC_SHA384; return TSIG_ALGO_NAME; }
+hmac-sha512     { lval.alg = KNOT_TSIG_ALG_HMAC_SHA512; return TSIG_ALGO_NAME; }
+
+["][^"\n]*["] {
+  yytext[yyleng-1] = 0;
+  lval.t = strdup(yytext + 1);
+  return TEXT;
+}
+
+["][^"\n]*\n    cf_error(yyscanner, "Unterminated string.");
+
+[a-zA-Z0-9\.\-\_]+ {
+  lval.t = strdup(yytext);
+  return TEXT /* Last resort, alphanumeric word. */;
+}
+
+<<EOF>> return END;
+
+%%
+
diff --git a/src/knot/conf/cf-parse.y b/src/knot/conf/cf-parse.y
new file mode 100644
index 0000000..d793865
--- /dev/null
+++ b/src/knot/conf/cf-parse.y
@@ -0,0 +1,646 @@
+/*!
+ * \file cf-parse.y
+ *
+ * \author Ondrej Sury <ondrej.sury@nic.cz>
+ *
+ * \brief Server configuration structures and API.
+ */
+%{
+/* Headers */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "libknot/dname.h"
+#include "knot/conf/conf.h"
+#include "libknotd_la-cf-parse.h" /* Automake generated header. */
+
+extern int cf_lex (YYSTYPE *lvalp, void *scanner);
+extern void cf_error(void *scanner, const char *msg);
+extern conf_t *new_config;
+static conf_iface_t *this_iface = 0;
+static conf_iface_t *this_remote = 0;
+static conf_zone_t *this_zone = 0;
+static list *this_list = 0;
+static conf_log_t *this_log = 0;
+static conf_log_map_t *this_logmap = 0;
+//#define YYERROR_VERBOSE 1
+
+static void conf_start_iface(char* ifname)
+{
+   this_iface = malloc(sizeof(conf_iface_t));
+   memset(this_iface, 0, sizeof(conf_iface_t));
+   this_iface->name = ifname;
+   this_iface->address = 0; // No default address (mandatory)
+   this_iface->port = CONFIG_DEFAULT_PORT;
+   add_tail(&new_config->ifaces, &this_iface->n);
+   ++new_config->ifaces_count;
+}
+
+static void conf_start_remote(char *remote)
+{
+   this_remote = malloc(sizeof(conf_iface_t));
+   memset(this_remote, 0, sizeof(conf_iface_t));
+   this_remote->name = remote;
+   this_remote->address = 0; // No default address (mandatory)
+   this_remote->port = 0; // Port wildcard
+   add_tail(&new_config->remotes, &this_remote->n);
+   ++new_config->remotes_count;
+}
+
+static void conf_acl_item(void *scanner, char *item)
+{
+      /* Find existing node in remotes. */
+      node* r = 0; conf_iface_t* found = 0;
+      WALK_LIST (r, new_config->remotes) {
+	 if (strcmp(((conf_iface_t*)r)->name, item) == 0) {
+	    found = (conf_iface_t*)r;
+	    break;
+	 }
+      }
+
+      /* Append to list if found. */
+     if (!found) {
+	char buf[512];
+	snprintf(buf, sizeof(buf), "remote '%s' is not defined", item);
+	cf_error(scanner, buf);
+     } else {
+	/* check port if xfrin/notify-out */
+	if (this_list == &this_zone->acl.xfr_in ||
+	   this_list == &this_zone->acl.notify_out) {
+	   if (found->port == 0) {
+	      cf_error(scanner, "remote specified for XFR/IN or NOTIFY/OUT "
+				" needs to have valid port!");
+	      free(item);
+	      return;
+	   }
+	}
+	conf_remote_t *remote = malloc(sizeof(conf_remote_t));
+	if (!remote) {
+	   cf_error(scanner, "out of memory");
+	} else {
+	   remote->remote = found;
+	   add_tail(this_list, &remote->n);
+	}
+     }
+
+     /* Free text token. */
+     free(item);
+   }
+
+static int conf_key_exists(void *scanner, char *item)
+{
+    /* Find existing node in keys. */
+    knot_dname_t *sample = knot_dname_new_from_str(item, strlen(item), 0);
+    char buf[512];
+    conf_key_t* r = 0;
+    WALK_LIST (r, new_config->keys) {
+        if (knot_dname_compare(r->k.name, sample) == 0) {
+           snprintf(buf, sizeof(buf), "key '%s' is already defined", item);
+           cf_error(scanner, buf);
+	   knot_dname_free(&sample);
+           return 1;
+        }
+    }
+
+    knot_dname_free(&sample);
+    return 0;
+}
+
+static int conf_key_add(void *scanner, knot_key_t **key, char *item)
+{
+    /* Reset */
+    *key = 0;
+    
+    /* Find in keys */
+    knot_dname_t *sample = knot_dname_new_from_str(item, strlen(item), 0);
+    
+    conf_key_t* r = 0;
+    WALK_LIST (r, new_config->keys) {
+        if (knot_dname_compare(r->k.name, sample) == 0) {
+           *key = &r->k;
+           knot_dname_free(&sample);
+           return 0;
+        }
+    }
+
+    char buf[512];
+    snprintf(buf, sizeof(buf), "key '%s' is not defined", item);
+    cf_error(scanner, buf);
+    knot_dname_free(&sample);
+    return 1;
+}
+
+%}
+
+%pure-parser
+%parse-param{void *scanner}
+%lex-param{void *scanner}
+%name-prefix = "cf_"
+
+%union {
+    struct {
+       char *t;
+       long i;
+       size_t l;
+       tsig_algorithm_t alg;
+    } tok;
+}
+
+%token END INVALID_TOKEN
+%token <tok> TEXT
+%token <tok> NUM
+%token <tok> INTERVAL
+%token <tok> SIZE
+%token <tok> BOOL
+
+%token <tok> SYSTEM IDENTITY VERSION STORAGE KEY KEYS
+%token <tok> TSIG_ALGO_NAME
+%token <tok> WORKERS
+
+%token <tok> REMOTES
+
+%token <tok> ZONES FILENAME
+%token <tok> SEMANTIC_CHECKS
+%token <tok> NOTIFY_RETRIES
+%token <tok> NOTIFY_TIMEOUT
+%token <tok> DBSYNC_TIMEOUT
+%token <tok> IXFR_FSLIMIT
+%token <tok> XFR_IN
+%token <tok> XFR_OUT
+%token <tok> NOTIFY_IN
+%token <tok> NOTIFY_OUT
+
+%token <tok> INTERFACES ADDRESS PORT
+%token <tok> IPA
+%token <tok> IPA6
+
+%token <tok> LOG
+%token <tok> LOG_DEST
+%token <tok> LOG_SRC
+%token <tok> LOG_LEVEL
+
+%%
+
+config: conf_entries END { return 0; } ;
+
+conf_entries:
+ /* EMPTY */
+ | conf_entries conf
+ ;
+
+interface_start:
+ | TEXT { conf_start_iface($1.t); }
+ | REMOTES  { conf_start_iface(strdup($1.t)); } /* Allow strings reserved by token. */
+ | LOG_SRC  { conf_start_iface(strdup($1.t)); }
+ | LOG  { conf_start_iface(strdup($1.t)); }
+ | LOG_LEVEL  { conf_start_iface(strdup($1.t)); }
+ ;
+
+interface:
+   interface_start '{'
+ | interface PORT NUM ';' {
+     if (this_iface->port != CONFIG_DEFAULT_PORT) {
+       cf_error(scanner, "only one port definition is allowed in interface section\n");
+     } else {
+       this_iface->port = $3.i;
+     }
+   }
+ | interface ADDRESS IPA ';' {
+     if (this_iface->address != 0) {
+       cf_error(scanner, "only one address is allowed in interface section\n");
+     } else {
+       this_iface->address = $3.t;
+       this_iface->family = AF_INET;
+     }
+   }
+ | interface ADDRESS IPA '@' NUM ';' {
+     if (this_iface->address != 0) {
+       cf_error(scanner, "only one address is allowed in interface section\n");
+     } else {
+       this_iface->address = $3.t;
+       this_iface->family = AF_INET;
+       if (this_iface->port != CONFIG_DEFAULT_PORT) {
+	 cf_error(scanner, "only one port definition is allowed in interface section\n");
+       } else {
+	 this_iface->port = $5.i;
+       }
+     }
+   }
+ | interface ADDRESS IPA6 ';' {
+     if (this_iface->address != 0) {
+       cf_error(scanner, "only one address is allowed in interface section\n");
+     } else {
+       this_iface->address = $3.t;
+       this_iface->family = AF_INET6;
+     }
+   }
+ | interface ADDRESS IPA6 '@' NUM ';' {
+     if (this_iface->address != 0) {
+       cf_error(scanner, "only one address is allowed in interface section\n");
+     } else {
+       this_iface->address = $3.t;
+       this_iface->family = AF_INET6;
+       if (this_iface->port != CONFIG_DEFAULT_PORT) {
+          cf_error(scanner, "only one port definition is allowed in interface section\n");
+       } else {
+          this_iface->port = $5.i;
+       }
+     }
+   }
+ ;
+
+interfaces:
+   INTERFACES '{'
+ | interfaces interface '}' {
+   if (this_iface->address == 0) {
+     char buf[512];
+     snprintf(buf, sizeof(buf), "interface '%s' has no defined address", this_iface->name);
+     cf_error(scanner, buf);
+   }
+ }
+ ;
+
+system:
+   SYSTEM '{'
+ | system VERSION TEXT ';' { new_config->version = $3.t; }
+ | system IDENTITY TEXT ';' { new_config->identity = $3.t; }
+ | system STORAGE TEXT ';' { new_config->storage = $3.t; }
+ | system KEY TSIG_ALGO_NAME TEXT ';' {
+     fprintf(stderr, "warning: Config option 'system.key' is deprecated "
+		     "and has no effect.\n");
+     free($4.t);
+ }
+ | system WORKERS NUM ';' { 
+     if ($3.i <= 0) { 
+        cf_error(scanner, "worker count must be greater than 0\n");
+     } else {
+        new_config->workers = $3.i;
+     }
+ }
+ ;
+
+keys:
+   KEYS '{'
+ | keys TEXT TSIG_ALGO_NAME TEXT ';' {
+     /* Normalize to FQDN */
+     char *fqdn = $2.t;
+     if (fqdn[strlen(fqdn) - 1] != '.') {
+        char* tmp = malloc(strlen(fqdn) + 1 + 1); /* '.', '\0' */
+	if (!tmp) {
+	   cf_error(scanner, "out of memory when allocating string");
+	   free(fqdn);
+	   fqdn = 0;
+	} else {
+	   strcpy(tmp, fqdn);
+	   strcat(tmp, ".");
+	   free(fqdn);
+	   fqdn = tmp;
+	}
+     }
+
+     if (!conf_key_exists(scanner, fqdn)) {
+         knot_dname_t *dname = knot_dname_new_from_str(fqdn, strlen(fqdn), 0);
+	 if (!dname) {
+	     char buf[512];
+             snprintf(buf, sizeof(buf), "key name '%s' not in valid domain "
+	                                "name format", fqdn);
+             cf_error(scanner, buf);
+	     free(fqdn);
+	     free($4.t);
+	 } else {
+             conf_key_t *k = malloc(sizeof(conf_key_t));
+             memset(k, 0, sizeof(conf_key_t));
+             k->k.name = dname;
+             k->k.algorithm = $3.alg;
+             k->k.secret = $4.t;
+             add_tail(&new_config->keys, &k->n);
+             ++new_config->key_count;
+	     free(fqdn);
+	 }
+     } else {
+         free(fqdn);
+         free($4.t);
+     }
+}
+
+remote_start:
+ | TEXT { conf_start_remote($1.t); }
+ | LOG_SRC  { conf_start_remote(strdup($1.t)); }
+ | LOG  { conf_start_remote(strdup($1.t)); }
+ | LOG_LEVEL  { conf_start_remote(strdup($1.t)); }
+ ;
+
+remote:
+   remote_start '{'
+ | remote PORT NUM ';' {
+     if (this_remote->port != 0) {
+       cf_error(scanner, "only one port definition is allowed in remote section\n");
+     } else {
+       this_remote->port = $3.i;
+     }
+   }
+ | remote ADDRESS IPA ';' {
+     if (this_remote->address != 0) {
+       cf_error(scanner, "only one address is allowed in remote section\n");
+     } else {
+       this_remote->address = $3.t;
+       this_remote->family = AF_INET;
+     }
+   }
+ | remote ADDRESS IPA '@' NUM ';' {
+     if (this_remote->address != 0) {
+       cf_error(scanner, "only one address is allowed in remote section\n");
+     } else {
+       this_remote->address = $3.t;
+       this_remote->family = AF_INET;
+       if (this_remote->port != 0) {
+	 cf_error(scanner, "only one port definition is allowed in remote section\n");
+       } else {
+	 this_remote->port = $5.i;
+       }
+     }
+   }
+ | remote ADDRESS IPA6 ';' {
+     if (this_remote->address != 0) {
+       cf_error(scanner, "only one address is allowed in remote section\n");
+     } else {
+       this_remote->address = $3.t;
+       this_remote->family = AF_INET6;
+     }
+   }
+ | remote ADDRESS IPA6 '@' NUM ';' {
+     if (this_remote->address != 0) {
+       cf_error(scanner, "only one address is allowed in remote section\n");
+     } else {
+       this_remote->address = $3.t;
+       this_remote->family = AF_INET6;
+       if (this_remote->port != 0) {
+	 cf_error(scanner, "only one port definition is allowed in remote section\n");
+       } else {
+	 this_remote->port = $5.i;
+       }
+     }
+   }
+ | remote KEY TEXT ';' {
+     if (this_remote->key != 0) {
+       cf_error(scanner, "only one TSIG key definition is allowed in remote section\n");
+     } else {
+        conf_key_add(scanner, &this_remote->key, $3.t);
+     }
+   }
+ ;
+
+remotes:
+   REMOTES '{'
+ | remotes remote '}' {
+     if (this_remote->address == 0) {
+       char buf[512];
+       snprintf(buf, sizeof(buf), "remote '%s' has no defined address", this_remote->name);
+       cf_error(scanner, buf);
+     }
+   }
+ ;
+
+zone_acl_start:
+   XFR_IN {
+      this_list = &this_zone->acl.xfr_in;
+   }
+ | XFR_OUT {
+      this_list = &this_zone->acl.xfr_out;
+   }
+ | NOTIFY_IN {
+      this_list = &this_zone->acl.notify_in;
+   }
+ | NOTIFY_OUT {
+      this_list = &this_zone->acl.notify_out;
+   }
+ ;
+
+zone_acl_item:
+ | TEXT { conf_acl_item(scanner, $1.t); }
+ | LOG_SRC  { conf_acl_item(scanner, strdup($1.t)); }
+ | LOG  { conf_acl_item(scanner, strdup($1.t)); }
+ | LOG_LEVEL  { conf_acl_item(scanner, strdup($1.t)); }
+ ;
+
+zone_acl_list:
+   zone_acl_start
+ | zone_acl_list zone_acl_item ','
+ | zone_acl_list zone_acl_item ';'
+ ;
+
+zone_acl:
+   zone_acl_start '{'
+ | zone_acl TEXT ';' {
+      /* Find existing node in remotes. */
+      node* r = 0; conf_iface_t* found = 0;
+      WALK_LIST (r, new_config->remotes) {
+	 if (strcmp(((conf_iface_t*)r)->name, $2.t) == 0) {
+	    found = (conf_iface_t*)r;
+	    break;
+	 }
+      }
+
+      /* Append to list if found. */
+      if (!found) {
+	 char buf[256];
+	 snprintf(buf, sizeof(buf), "remote '%s' is not defined", $2.t);
+	 cf_error(scanner, buf);
+      } else {
+	 conf_remote_t *remote = malloc(sizeof(conf_remote_t));
+	 if (!remote) {
+	    cf_error(scanner, "out of memory");
+	 } else {
+	    remote->remote = found;
+	    add_tail(this_list, &remote->n);
+	 }
+      }
+
+      /* Free text token. */
+      free($2.t);
+   }
+ ;
+
+zone_start: TEXT {
+   this_zone = malloc(sizeof(conf_zone_t));
+   memset(this_zone, 0, sizeof(conf_zone_t));
+   this_zone->enable_checks = -1; // Default policy applies
+   this_zone->notify_timeout = -1; // Default policy applies
+   this_zone->notify_retries = 0; // Default policy applies
+   this_zone->ixfr_fslimit = -1; // Default policy applies
+   this_zone->dbsync_timeout = -1; // Default policy applies
+   this_zone->name = $1.t;
+
+   // Append mising dot to ensure FQDN
+   size_t nlen = strlen(this_zone->name);
+   if (this_zone->name[nlen - 1] != '.') {
+     this_zone->name = realloc(this_zone->name, nlen + 1 + 1);
+     strcat(this_zone->name, ".");
+   }
+
+   /* Check domain name. */
+   knot_dname_t *dn = knot_dname_new_from_str(this_zone->name,
+                                                  nlen + 1,
+                                                  0);
+   if (dn == 0) {
+     free(this_zone->name);
+     free(this_zone);
+     cf_error(scanner, "invalid zone origin");
+   } else {
+     /* Directly discard dname, won't be needed. */
+     knot_dname_free(&dn);
+     add_tail(&new_config->zones, &this_zone->n);
+     ++new_config->zones_count;
+
+     /* Initialize ACL lists. */
+     init_list(&this_zone->acl.xfr_in);
+     init_list(&this_zone->acl.xfr_out);
+     init_list(&this_zone->acl.notify_in);
+     init_list(&this_zone->acl.notify_out);
+   }
+ }
+ ;
+
+zone:
+   zone_start '{'
+ | zone zone_acl '}'
+ | zone zone_acl_list
+ | zone FILENAME TEXT ';' { this_zone->file = $3.t; }
+ | zone SEMANTIC_CHECKS BOOL ';' { this_zone->enable_checks = $3.i; }
+ | zone DBSYNC_TIMEOUT NUM ';' { this_zone->dbsync_timeout = $3.i; }
+ | zone DBSYNC_TIMEOUT INTERVAL ';' { this_zone->dbsync_timeout = $3.i; }
+ | zone IXFR_FSLIMIT SIZE ';' { new_config->ixfr_fslimit = $3.l; }
+ | zone IXFR_FSLIMIT NUM ';' { this_zone->ixfr_fslimit = $3.i; }
+ | zone NOTIFY_RETRIES NUM ';' {
+       if ($3.i < 1) {
+	   cf_error(scanner, "notify retries must be positive integer");
+       } else {
+	   this_zone->notify_retries = $3.i;
+       }
+   }
+ | zone NOTIFY_TIMEOUT NUM ';' {
+	if ($3.i < 1) {
+	   cf_error(scanner, "notify timeout must be positive integer");
+       } else {
+	   this_zone->notify_timeout = $3.i;
+       }
+   }
+ ;
+
+zones:
+   ZONES '{'
+ | zones zone '}'
+ | zones SEMANTIC_CHECKS BOOL ';' { new_config->zone_checks = $3.i; }
+ | zones IXFR_FSLIMIT SIZE ';' { new_config->ixfr_fslimit = $3.l; }
+ | zones IXFR_FSLIMIT NUM ';' { new_config->ixfr_fslimit = $3.i; }
+ | zones NOTIFY_RETRIES NUM ';' {
+       if ($3.i < 1) {
+	   cf_error(scanner, "notify retries must be positive integer");
+       } else {
+	   new_config->notify_retries = $3.i;
+       }
+   }
+ | zones NOTIFY_TIMEOUT NUM ';' {
+	if ($3.i < 1) {
+	   cf_error(scanner, "notify timeout must be positive integer");
+       } else {
+	   new_config->notify_timeout = $3.i;
+       }
+   }
+ | zones DBSYNC_TIMEOUT NUM ';' {
+	if ($3.i < 1) {
+	   cf_error(scanner, "zonefile sync timeout must be positive integer");
+       } else {
+	   new_config->dbsync_timeout = $3.i;
+       }
+ }
+ | zones DBSYNC_TIMEOUT INTERVAL ';' { new_config->dbsync_timeout = $3.i; }
+ ;
+
+log_prios_start: {
+  this_logmap = malloc(sizeof(conf_log_map_t));
+  this_logmap->source = 0;
+  this_logmap->prios = 0;
+  add_tail(&this_log->map, &this_logmap->n);
+}
+;
+
+log_prios:
+   log_prios_start
+ | log_prios LOG_LEVEL ',' { this_logmap->prios |= $2.i; }
+ | log_prios LOG_LEVEL ';' { this_logmap->prios |= $2.i; }
+ ;
+
+log_src:
+ | log_src LOG_SRC log_prios {
+     this_logmap->source = $2.i;
+     this_logmap = 0;
+   }
+ ;
+
+log_dest: LOG_DEST {
+  /* Find already existing rule. */
+  this_log = 0;
+  node *n = 0;
+  WALK_LIST(n, new_config->logs) {
+    conf_log_t* log = (conf_log_t*)n;
+    if (log->type == $1.i) {
+      this_log = log;
+      break;
+    }
+  }
+
+  if (!this_log) {
+    this_log = malloc(sizeof(conf_log_t));
+    this_log->type = $1.i;
+    this_log->file = 0;
+    init_list(&this_log->map);
+    add_tail(&new_config->logs, &this_log->n);
+    ++new_config->logs_count;
+  }
+}
+;
+
+log_file: FILENAME TEXT {
+  /* Find already existing rule. */
+  this_log = 0;
+  node *n = 0;
+  WALK_LIST(n, new_config->logs) {
+    conf_log_t* log = (conf_log_t*)n;
+    if (log->type == LOGT_FILE) {
+      if (strcmp($2.t, log->file) == 0) {
+        this_log = log;
+	free($2.t);
+        break;
+      }
+    }
+  }
+
+  /* Create new rule. */
+  if (!this_log) {
+    this_log = malloc(sizeof(conf_log_t));
+    this_log->type = LOGT_FILE;
+    this_log->file = strcpath($2.t);
+    init_list(&this_log->map);
+    add_tail(&new_config->logs, &this_log->n);
+    ++new_config->logs_count;
+  }
+}
+;
+
+log_end: {
+}
+;
+
+log_start:
+ | log_start log_dest '{' log_src '}'
+ | log_start log_file '{' log_src '}'
+ ;
+
+log: LOG '{' log_start log_end;
+
+
+conf: ';' | system '}' | interfaces '}' | keys '}' | remotes '}' | zones '}' | log '}';
+
+%%
+
diff --git a/src/knot/conf/conf.c b/src/knot/conf/conf.c
new file mode 100644
index 0000000..4e2d665
--- /dev/null
+++ b/src/knot/conf/conf.c
@@ -0,0 +1,715 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <urcu.h>
+#include "knot/conf/conf.h"
+#include "knot/common.h"
+#include "knot/other/error.h"
+
+/*
+ * Defaults.
+ */
+
+/*! \brief Default config paths. */
+static const char *DEFAULT_CONFIG[] = {
+	SYSCONFDIR "/" "knot.conf",
+};
+
+#define DEFAULT_CONF_COUNT 1 /*!< \brief Number of default config paths. */
+
+/*
+ * Utilities.
+ */
+
+/*!
+ * \brief Recursively create directories.
+ *
+ * Similar to "mkdir -p".
+ * * \retval 0 on success.
+ * \retval <0 on error.
+ */
+static int rmkdir(char *path, int mode)
+{
+	char *p = path;
+	while((p = strchr(p + 1, '/'))) {
+		*p = '\0';
+		mkdir(path, mode);
+		*p = '/';
+	}
+
+	// Final path
+	return mkdir(path, mode);
+}
+
+/* Prototypes for cf-parse.y */
+extern int cf_parse(void *scanner);
+extern int cf_get_lineno(void *scanner);
+extern char *cf_get_text(void *scanner);
+extern int cf_lex_init(void *scanner);
+extern void cf_set_in(FILE *f, void *scanner);
+extern void cf_lex_destroy(void *scanner);
+extern void switch_input(const char *str, void *scanner);
+
+conf_t *new_config = 0; /*!< \brief Currently parsed config. */
+static volatile int _parser_res = 0; /*!< \brief Parser result. */
+static pthread_mutex_t _parser_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/*! \brief Config error report. */
+void cf_error(void *scanner, const char *msg)
+{
+	int lineno = -1;
+	char *text = "???";
+	if (scanner) {
+		lineno = cf_get_lineno(scanner);
+		text = (char *)cf_get_text(scanner);
+	}
+
+	log_server_error("Config '%s' - %s on line %d (current token '%s').\n",
+			 new_config->filename, msg, lineno, text);
+
+
+	_parser_res = KNOTD_EPARSEFAIL;
+}
+
+/*
+ * Config helper functions.
+ */
+
+/*! \brief Free TSIG key. */
+static void key_free(conf_key_t *k)
+{
+	/* Secure erase. */
+	if (k->k.secret) {
+		memset(k->k.secret, 0, strlen(k->k.secret));
+	}
+	free(k->k.secret);
+	knot_dname_free(&k->k.name);
+	free(k);
+}
+
+/*! \brief Free config interfaces. */
+static void iface_free(conf_iface_t *iface)
+{
+	if (!iface) {
+		return;
+	}
+
+	free(iface->name);
+	free(iface->address);
+	free(iface);
+}
+
+/*! \brief Free config logs. */
+static void log_free(conf_log_t *log)
+{
+	if (!log) {
+		return;
+	}
+
+	if (log->file) {
+		free(log->file);
+	}
+
+	/* Free loglevel mapping. */
+	node *n = 0, *nxt = 0;
+	WALK_LIST_DELSAFE(n, nxt, log->map) {
+		free((conf_log_map_t*)n);
+	}
+
+	free(log);
+}
+
+/*! \brief Free config zones. */
+static void zone_free(conf_zone_t *zone)
+{
+	if (!zone) {
+		return;
+	}
+
+	/* Free ACL lists. */
+	WALK_LIST_FREE(zone->acl.xfr_in);
+	WALK_LIST_FREE(zone->acl.xfr_out);
+	WALK_LIST_FREE(zone->acl.notify_in);
+	WALK_LIST_FREE(zone->acl.notify_out);
+
+	free(zone->name);
+	free(zone->file);
+	free(zone->db);
+	free(zone->ixfr_db);
+	free(zone);
+}
+
+/*!
+ * \brief Call config hooks that need updating.
+ *
+ * This function is called automatically after config update.
+ *
+ * \todo Selective hooks.
+ */
+static void conf_update_hooks(conf_t *conf)
+{
+	node *n = 0;
+	conf->_touched = CONF_ALL;
+	WALK_LIST (n, conf->hooks) {
+		conf_hook_t *hook = (conf_hook_t*)n;
+		if ((hook->sections & conf->_touched) && hook->update) {
+			hook->update(conf, hook->data);
+		}
+	}
+}
+
+/*!
+ * \brief Process parsed configuration.
+ *
+ * This functions is called automatically after config parsing.
+ * It is needed to setup needed primitives, check and update paths.
+ *
+ * \retval 0 on success.
+ * \retval <0 on error.
+ */
+static int conf_process(conf_t *conf)
+{
+	// Check
+	if (!conf->storage) {
+		conf->storage = strdup("/var/lib/"PROJECT_EXEC);
+	}
+	
+	// Normalize paths
+	conf->storage = strcpath(conf->storage);
+	struct stat st;
+	if (stat(conf->storage, &st) != 0) {
+		rmkdir(conf->storage, S_IRWXU);
+	}
+
+	// Create PID file
+	conf->pidfile = strcdup(conf->storage, "/" PID_FILE);
+
+	// Postprocess zones
+	node *n = 0;
+	WALK_LIST (n, conf->zones) {
+		conf_zone_t *zone = (conf_zone_t*)n;
+
+		// Default policy for dbsync timeout
+		if (zone->dbsync_timeout < 0) {
+			zone->dbsync_timeout = conf->dbsync_timeout;
+		}
+
+		// Default policy for semantic checks
+		if (zone->enable_checks < 0) {
+			zone->enable_checks = conf->zone_checks;
+		}
+
+		// Default policy for NOTIFY retries
+		if (zone->notify_retries <= 0) {
+			zone->notify_retries = conf->notify_retries;
+		}
+
+		// Default policy for NOTIFY timeout
+		if (zone->notify_timeout <= 0) {
+			zone->notify_timeout = conf->notify_timeout;
+		}
+
+		// Default policy for IXFR FSLIMIT
+		if (zone->ixfr_fslimit == 0) {
+			zone->ixfr_fslimit = conf->ixfr_fslimit;
+		}
+
+		// Normalize zone filename
+		zone->file = strcpath(zone->file);
+
+		// Create zone db filename
+		size_t stor_len = strlen(conf->storage);
+		size_t size = stor_len + strlen(zone->name) + 4; // db/,\0
+		char *dest = malloc(size);
+		strcpy(dest, conf->storage);
+		if (conf->storage[stor_len - 1] != '/') {
+			strcat(dest, "/");
+		}
+
+		strcat(dest, zone->name);
+		strcat(dest, "db");
+		zone->db = dest;
+
+		// Create IXFR db filename
+		stor_len = strlen(conf->storage);
+		size = stor_len + strlen(zone->name) + 9; // diff.db/,\0
+		dest = malloc(size);
+		strcpy(dest, conf->storage);
+		if (conf->storage[stor_len - 1] != '/') {
+			strcat(dest, "/");
+		}
+
+		strcat(dest, zone->name);
+		strcat(dest, "diff.db");
+		zone->ixfr_db = dest;
+	}
+
+	return 0;
+}
+
+/*
+ * Singletion configuration API.
+ */
+
+conf_t *s_config = 0; /*! \brief Singleton config instance. */
+
+/*! \brief Singleton config constructor (automatically called on load). */
+void __attribute__ ((constructor)) conf_init()
+{
+	// Create new config
+	s_config = conf_new(0);
+
+	/* Create default interface. */
+	conf_iface_t * iface = malloc(sizeof(conf_iface_t));
+	memset(iface, 0, sizeof(conf_iface_t));
+	iface->name = strdup("any");
+	iface->address = strdup("0.0.0.0");
+	iface->port = CONFIG_DEFAULT_PORT;
+	add_tail(&s_config->ifaces, &iface->n);
+	++s_config->ifaces_count;
+
+	/* Create default storage. */
+	s_config->storage = strdup("/var/lib/"PROJECT_EXEC);
+
+	/* Create default logs. */
+
+	/* Syslog */
+	conf_log_t *log = malloc(sizeof(conf_log_t));
+	log->type = LOGT_SYSLOG;
+	log->file = 0;
+	init_list(&log->map);
+
+	conf_log_map_t *map = malloc(sizeof(conf_log_map_t));
+	map->source = LOG_ANY;
+	map->prios = LOG_MASK(LOG_WARNING)|LOG_MASK(LOG_ERR);
+	add_tail(&log->map, &map->n);
+	add_tail(&s_config->logs, &log->n);
+	++s_config->logs_count;
+
+	/* Stderr */
+	log = malloc(sizeof(conf_log_t));
+	log->type = LOGT_STDERR;
+	log->file = 0;
+	init_list(&log->map);
+
+	map = malloc(sizeof(conf_log_map_t));
+	map->source = LOG_ANY;
+	map->prios = LOG_MASK(LOG_WARNING)|LOG_MASK(LOG_ERR);
+	add_tail(&log->map, &map->n);
+	add_tail(&s_config->logs, &log->n);
+	++s_config->logs_count;
+
+	/* Process config. */
+	conf_process(s_config);
+}
+
+/*! \brief Singleton config destructor (automatically called on exit). */
+void __attribute__ ((destructor)) conf_deinit()
+{
+	if (s_config) {
+		conf_free(s_config);
+		s_config = 0;
+	}
+}
+
+/*!
+ * \brief Parse config (from file).
+ * \return yyparser return value.
+ */
+static int conf_fparser(conf_t *conf)
+{
+	if (!conf->filename) {
+		return KNOTD_EINVAL;
+	}
+
+	int ret = KNOTD_EOK;
+	pthread_mutex_lock(&_parser_lock);
+	// {
+	// Hook new configuration
+	new_config = conf;
+	FILE *f = fopen(conf->filename, "r");
+	if (f == 0) {
+		pthread_mutex_unlock(&_parser_lock);
+		return KNOTD_ENOENT;
+	}
+
+	// Parse config
+	_parser_res = KNOTD_EOK;
+	new_config->filename = conf->filename;
+	void *sc = NULL;
+	cf_lex_init(&sc);
+	cf_set_in(f, sc);
+	cf_parse(sc);
+	cf_lex_destroy(sc);
+	ret = _parser_res;
+	fclose(f);
+	// }
+	pthread_mutex_unlock(&_parser_lock);
+	return ret;
+}
+
+/*! \brief Parse config (from string).
+ * \return yyparser return value.
+ */
+static int conf_strparser(conf_t *conf, const char *src)
+{
+	if (!src) {
+		return KNOTD_EINVAL;
+	}
+
+	int ret = KNOTD_EOK;
+	pthread_mutex_lock(&_parser_lock);
+	// {
+	// Hook new configuration
+	new_config = conf;
+	if (src == 0) {
+		pthread_mutex_unlock(&_parser_lock);
+		return KNOTD_ENOENT;
+	}
+
+	// Parse config
+	_parser_res = KNOTD_EOK;
+	char *oldfn = new_config->filename;
+	new_config->filename = "(stdin)";
+	void *sc = NULL;
+	cf_lex_init(&sc);
+	switch_input(src, sc);
+	cf_parse(sc);
+	cf_lex_destroy(sc);
+	new_config->filename = oldfn;
+	ret = _parser_res;
+	// }
+	pthread_mutex_unlock(&_parser_lock);
+	return ret;
+}
+
+/*
+ * API functions.
+ */
+
+conf_t *conf_new(const char* path)
+{
+	conf_t *c = malloc(sizeof(conf_t));
+	memset(c, 0, sizeof(conf_t));
+
+	// Add path
+	if (path) {
+		c->filename = strdup(path);
+	}
+
+	// Initialize lists
+	init_list(&c->logs);
+	init_list(&c->ifaces);
+	init_list(&c->zones);
+	init_list(&c->hooks);
+	init_list(&c->remotes);
+	init_list(&c->keys);
+
+	// Defaults
+	c->zone_checks = 0;
+	c->notify_retries = CONFIG_NOTIFY_RETRIES;
+	c->notify_timeout = CONFIG_NOTIFY_TIMEOUT;
+	c->dbsync_timeout = CONFIG_DBSYNC_TIMEOUT;
+	c->ixfr_fslimit = -1;
+
+	return c;
+}
+
+int conf_add_hook(conf_t * conf, int sections,
+                  int (*on_update)(const conf_t*, void*), void *data)
+{
+	conf_hook_t *hook = malloc(sizeof(conf_hook_t));
+	if (!hook) {
+		return KNOTD_ENOMEM;
+	}
+
+	hook->sections = sections;
+	hook->update = on_update;
+	hook->data = data;
+	add_tail(&conf->hooks, &hook->n);
+	++conf->hooks_count;
+
+	return KNOTD_EOK;
+}
+
+int conf_parse(conf_t *conf)
+{
+	/* Parse file. */
+	int ret = conf_fparser(conf);
+
+	/* Postprocess config. */
+	conf_process(conf);
+
+	/* Update hooks. */
+	conf_update_hooks(conf);
+
+	if (ret < 0) {
+		return KNOTD_EPARSEFAIL;
+	}
+
+	return KNOTD_EOK;
+}
+
+int conf_parse_str(conf_t *conf, const char* src)
+{
+	/* Parse config from string. */
+	int ret = conf_strparser(conf, src);
+
+	/* Postprocess config. */
+	conf_process(conf);
+
+	/* Update hooks */
+	conf_update_hooks(conf);
+
+	if (ret < 0) {
+		return KNOTD_EPARSEFAIL;
+	}
+
+	return KNOTD_EOK;
+}
+
+void conf_truncate(conf_t *conf, int unload_hooks)
+{
+	if (!conf) {
+		return;
+	}
+
+	node *n = 0, *nxt = 0;
+
+	// Unload hooks
+	if (unload_hooks) {
+		WALK_LIST_DELSAFE(n, nxt, conf->hooks) {
+			//! \todo call hook unload.
+			free((conf_hook_t*)n);
+		}
+		conf->hooks_count = 0;
+		init_list(&conf->hooks);
+	}
+
+	// Free keys
+	WALK_LIST_DELSAFE(n, nxt, conf->keys) {
+		key_free((conf_key_t *)n);
+	}
+
+	// Free interfaces
+	WALK_LIST_DELSAFE(n, nxt, conf->ifaces) {
+		iface_free((conf_iface_t*)n);
+	}
+	conf->ifaces_count = 0;
+	init_list(&conf->ifaces);
+
+	// Free logs
+	WALK_LIST_DELSAFE(n, nxt, conf->logs) {
+		log_free((conf_log_t*)n);
+	}
+	conf->logs_count = 0;
+	init_list(&conf->logs);
+
+	// Free remotes
+	WALK_LIST_DELSAFE(n, nxt, conf->remotes) {
+		iface_free((conf_iface_t*)n);
+	}
+	conf->remotes_count = 0;
+	init_list(&conf->remotes);
+
+	// Free zones
+	WALK_LIST_DELSAFE(n, nxt, conf->zones) {
+		zone_free((conf_zone_t*)n);
+	}
+	conf->zones_count = 0;
+	init_list(&conf->zones);
+
+	if (conf->filename) {
+		free(conf->filename);
+		conf->filename = 0;
+	}
+	if (conf->identity) {
+		free(conf->identity);
+		conf->identity = 0;
+	}
+	if (conf->version) {
+		free(conf->version);
+		conf->version = 0;
+	}
+	if (conf->storage) {
+		free(conf->storage);
+		conf->storage = 0;
+	}
+	if (conf->pidfile) {
+		free(conf->pidfile);
+		conf->pidfile = 0;
+	}
+}
+
+void conf_free(conf_t *conf)
+{
+	if (!conf) {
+		return;
+	}
+
+	// Truncate config
+	conf_truncate(conf, 1);
+
+	// Free config
+	free(conf);
+}
+
+char* conf_find_default()
+{
+	/* Try sequentially each default path. */
+	char *path = 0;
+	for (int i = 0; i < DEFAULT_CONF_COUNT; ++i) {
+		path = strcpath(strdup(DEFAULT_CONFIG[i]));
+
+		/* Break, if the path exists. */
+		struct stat st;
+		if (stat(path, &st) == 0) {
+			break;
+		}
+
+		log_server_notice("Config '%s' does not exist.\n",
+		                  path);
+
+		/* Keep the last item. */
+		if (i < DEFAULT_CONF_COUNT - 1) {
+			free(path);
+			path = 0;
+		}
+	}
+
+	log_server_info("Using '%s' as default configuration.\n",
+	                path);
+	return path;
+}
+
+int conf_open(const char* path)
+{
+	/* Check path. */
+	if (!path) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Check if exists. */
+	FILE *fp = fopen(path, "r");
+	if (fp == 0) {
+		return KNOTD_ENOENT;
+	} else {
+		fclose(fp);
+	}
+
+	/* Create new config. */
+	conf_t *nconf = conf_new(path);
+
+	/* Parse config. */
+	int ret = conf_fparser(nconf);
+	if (ret != KNOTD_EOK) {
+		conf_free(nconf);
+		return ret;
+	}
+
+	/* Replace current config. */
+	conf_t *oldconf = rcu_xchg_pointer(&s_config, nconf);
+
+	/* Copy hooks. */
+	if (oldconf) {
+		node *n = 0, *nxt = 0;
+		WALK_LIST_DELSAFE (n, nxt, oldconf->hooks) {
+			conf_hook_t *hook = (conf_hook_t*)n;
+			conf_add_hook(nconf, hook->sections,
+			              hook->update, hook->data);
+		}
+	}
+
+	/* Postprocess config. */
+	conf_process(nconf);
+
+	/* Synchronize. */
+	synchronize_rcu();
+
+	/* Free old config. */
+	if (oldconf) {
+		conf_free(oldconf);
+	}
+
+	/* Update hooks. */
+	conf_update_hooks(nconf);
+
+	return KNOTD_EOK;
+}
+
+char* strcdup(const char *s1, const char *s2)
+{
+	if (!s1 || !s2) {
+		return 0;
+	}
+	
+	size_t slen = strlen(s1);
+	size_t nlen = slen + strlen(s2) + 1;
+	char* dst = malloc(nlen);
+	if (!dst) {
+		return 0;
+	}
+
+	memcpy(dst, s1, slen);
+	strcpy(dst + slen, s2); // With trailing '\0'
+	return dst;
+}
+
+char* strcpath(char *path)
+{
+	// NULL path
+	if (!path) {
+		return 0;
+	}
+	
+	// Remote trailing slash
+	size_t plen = strlen(path);
+	if (path[plen - 1] == '/') {
+		path[--plen] = '\0';
+	}
+
+	// Expand '~'
+	char* tild_p = strchr(path,'~');
+	if (tild_p != 0) {
+		// Get full path
+		char *tild_exp = getenv("HOME");
+		size_t tild_len = strlen(tild_exp);
+		if (tild_exp[tild_len - 1] == '/') {
+			tild_exp[--tild_len] = '\0';
+		}
+
+		// Expand
+		char *npath = malloc(plen + tild_len + 1);
+		npath[0] = '\0';
+		strncpy(npath, path, (size_t)(tild_p - path));
+		strcat(npath, tild_exp);
+		strcat(npath, tild_p + 1);
+		free(path);
+		path = npath;
+	}
+
+	return path;
+}
+
diff --git a/src/knot/conf/conf.h b/src/knot/conf/conf.h
new file mode 100644
index 0000000..ef35e41
--- /dev/null
+++ b/src/knot/conf/conf.h
@@ -0,0 +1,361 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file conf.h
+ *
+ * \author Ondrej Sury <ondrej.sury@nic.cz>
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Server configuration structures and API.
+ *
+ * \addtogroup config
+ * @{
+ */
+
+#ifndef _KNOTD_CONF_H_
+#define _KNOTD_CONF_H_
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <urcu.h>
+
+#include "libknot/dname.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/tsig.h"
+#include "common/lists.h"
+#include "knot/other/log.h"
+
+/* Constants. */
+#define CONFIG_DEFAULT_PORT 53
+#define CONFIG_NOTIFY_RETRIES 5  /*!< 5 retries (suggested in RFC1996) */
+#define CONFIG_NOTIFY_TIMEOUT 60 /*!< 60s (suggested in RFC1996) */
+#define CONFIG_DBSYNC_TIMEOUT (60*60) /*!< 1 hour. */
+
+/*!
+ * \brief Configuration for the interface
+ *
+ * This structure holds the configuration of the various interfaces
+ * used in the configuration.  Same interface could be used for
+ * listening and outgoing function.
+ */
+typedef struct conf_iface_t {
+	node n;
+	char *name;       /*!< Internal name for the interface. */
+	char *address;    /*!< IP (IPv4/v6) address for this interface */
+	int port;         /*!< Port number for this interface */
+	int family;       /*!< Address family. */
+	knot_key_t *key;  /*!< TSIG key (only valid for remotes). */
+} conf_iface_t;
+
+/*!
+ * \brief Node containing poiner to remote.
+ *
+ * Used for zone ACL lists to prevent node duplication.
+ */
+typedef struct conf_remote_t {
+	node n;               /*!< List node. */
+	conf_iface_t *remote; /*!< Pointer to interface descriptor. */
+} conf_remote_t;
+
+/*!
+ * \brief Zone configuration.
+ *
+ * This structure holds the configuration for the zone.  In it's most
+ * basic form, it just allows to read a zone from the specific
+ * location on the disk.  It also allows to have multiple DNS servers
+ * as a source for the zone transfer and multiple DNS servers to allow
+ * zone transfers.  Same logic applies for the NOTIFY.
+ *
+ * \todo Missing XFR type (AXFR/IXFR/IXFR-ONLY) for each server.
+ */
+typedef struct conf_zone_t {
+	node n;
+	char *name;               /*!< Zone name. */
+	enum knot_rr_class cls;   /*!< Zone class (IN or CH). */
+	char *file;               /*!< Path to a zone file. */
+	char *db;                 /*!< Path to a database file. */
+	char *ixfr_db;            /*!< Path to a IXFR database file. */
+	size_t ixfr_fslimit;      /*!< File size limit for IXFR journal. */
+	int dbsync_timeout;       /*!< Interval between syncing to zonefile.*/
+	int enable_checks;        /*!< Semantic checks for parser.*/
+	int notify_retries;       /*!< NOTIFY query retries. */
+	int notify_timeout;       /*!< Timeout for NOTIFY response (s). */
+	struct {
+		list xfr_in;      /*!< Remotes accepted for for xfr-in.*/
+		list xfr_out;     /*!< Remotes accepted for xfr-out.*/
+		list notify_in;   /*!< Remotes accepted for notify-in.*/
+		list notify_out;  /*!< Remotes accepted for notify-out.*/
+	} acl;
+} conf_zone_t;
+
+/*!
+ * \brief Mapping of loglevels to message sources.
+ */
+typedef struct conf_log_map_t {
+	node n;
+	int source; /*!< Log message source mask. */
+	int prios;  /*!< Log priorities mask. */
+} conf_log_map_t;
+
+/*!
+ * \brief Log facility descriptor.
+ */
+typedef struct conf_log_t {
+	node n;
+	logtype_t type;  /*!< Type of the log (SYSLOG/STDERR/FILE). */
+	char *file;      /*!< Filename in case of LOG_FILE, else NULL. */
+	list map;        /*!< Log levels mapping. */
+} conf_log_t;
+
+/*!
+ * \brief Configuration sections.
+ */
+typedef enum conf_section_t {
+	CONF_LOG    = 1 << 0, /*!< Log section. */
+	CONF_IFACES = 1 << 1, /*!< Interfaces. */
+	CONF_ZONES  = 1 << 2, /*!< Zones. */
+	CONF_OTHER  = 1 << 3, /*!< Other sections. */
+	CONF_ALL    = ~0      /*!< All sections. */
+} conf_section_t;
+
+/*!
+ * \brief TSIG key list item.
+ */
+typedef struct conf_key_t {
+	node n;
+	knot_key_t k;
+} conf_key_t;
+
+/*!
+ * \brief Main config structure.
+ *
+ * Configuration structure.
+ */
+typedef struct conf_t {
+	/*
+	 * System
+	 */
+	char *filename; /*!< Name of the config file. */
+	char *identity; /*!< Identity to return on CH TXT id.server. */
+	char *version;  /*!< Version for CH TXT version.{bind|server} */
+	char *storage;  /*!< Persistent storage path for databases and such. */
+	char *pidfile;  /*!< PID file path. */
+	int   workers;  /*!< Number of workers per interface. */
+
+	/*
+	 * Log
+	 */
+	list logs;        /*!< List of logging facilites. */
+	int logs_count;   /*!< Count of logging facilities. */
+
+	/*
+	 * Interfaces
+	 */
+	list ifaces;      /*!< List of interfaces. */
+	int ifaces_count; /*!< Count of interfaces. */
+
+	/*
+	 * TSIG keys
+	 */
+	list keys;     /*!< List of TSIG keys. */
+	int key_count; /*!< Count of TSIG keys. */
+
+	/*
+	 * Remotes
+	 */
+	list remotes;     /*!< List of remotes. */
+	int remotes_count;/*!< Count of remotes. */
+
+	/*
+	 * Zones
+	 */
+	list zones;       /*!< List of zones. */
+	int zones_count;  /*!< Count of zones. */
+	int zone_checks;  /*!< Semantic checks for parser.*/
+	int notify_retries; /*!< NOTIFY query retries. */
+	int notify_timeout; /*!< Timeout for NOTIFY response in seconds. */
+	int dbsync_timeout; /*!< Default interval between syncing to zonefile.*/
+	size_t ixfr_fslimit; /*!< File size limit for IXFR journal. */
+
+	/*
+	 * Implementation specifics
+	 */
+	list hooks;      /*!< List of config hooks. */
+	int hooks_count; /*!< Count of config hooks. */
+	int _touched;    /*!< Bitmask of sections touched by last update. */
+} conf_t;
+
+/*!
+ * \brief Config hook prototype.
+ */
+typedef struct conf_hook_t {
+	node n;
+	int sections; /*!< Bitmask of watched sections. */
+	int (*update)(const conf_t*, void*); /*!< Function executed on config load. */
+	void *data;
+} conf_hook_t;
+
+/*
+ * Specific configuration API.
+ */
+
+/*!
+ * \brief Create new configuration structure.
+ *
+ * \param path Path to configuration file.
+ * \retval new structure if successful.
+ * \retval NULL on error.
+ */
+conf_t *conf_new(const char* path);
+
+/*!
+ * \brief Register on-update callback.
+ *
+ * \param conf Configuration context.
+ * \param sections Bitmask of watched sections or CONF_ALL.
+ * \param on_update Callback.
+ * \param data User specified data for hook.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ENOMEM out of memory error.
+ */
+int conf_add_hook(conf_t * conf, int sections,
+                  int (*on_update)(const conf_t*, void*), void *data);
+
+/*!
+ * \brief Parse configuration from associated file.
+ *
+ * \note Registered callbacks may be executed if applicable.
+ *
+ * \param conf Configuration context.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EPARSEFAIL on parser error.
+ */
+int conf_parse(conf_t *conf);
+
+/*!
+ * \brief Parse configuration from string.
+ *
+ * \note Registered callbacks may be executed if applicable.
+ *
+ * \param conf Configuration context.
+ * \param src Source string.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EPARSEFAIL on parser error.
+ */
+int conf_parse_str(conf_t *conf, const char* src);
+
+/*!
+ * \brief Truncate configuration context.
+ *
+ * \param conf Configuration context.
+ * \param unload_hooks If true, hooks will be unregistered and freed as well.
+ */
+void conf_truncate(conf_t *conf, int unload_hooks);
+
+/*!
+ * \brief Destroy configuration context.
+ *
+ * \param conf Configuration context.
+ */
+void conf_free(conf_t *conf);
+
+/*
+ * Singleton configuration API.
+ */
+
+/*!
+ * \brief Find implicit configuration file.
+ *
+ * Ordering:
+ * 1. ~/.knot/knot.conf (if exists)
+ * 2. /etc/knot/knot.conf (fallback)
+ *
+ * \return Path to implicit configuration file.
+ */
+char* conf_find_default();
+
+/*!
+ * \brief Open singleton configuration from file.
+ *
+ * \note Registered callbacks may be executed if applicable.
+ *
+ * \param path Path to configuration file.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on null path.
+ * \retval KNOTD_ENOENT if the path doesn't exist.
+ */
+int conf_open(const char* path);
+
+/* Imported singleton */
+extern conf_t *s_config;
+
+/*!
+ * \brief Singleton configuration context accessor.
+ *
+ * \return Configuration context.
+ */
+static inline conf_t* conf() {
+	return s_config; // Inline for performance reasons.
+}
+
+/*!
+ * \brief Lock configuration for reading.
+ *
+ * \return Configuration context.
+ */
+static inline void conf_read_lock() {
+	rcu_read_lock();
+}
+
+/*!
+ * \brief Unlock configuration for reading.
+ */
+static inline void conf_read_unlock() {
+	rcu_read_unlock();
+}
+
+/*
+ * Utilities.
+ */
+
+/*!
+ * \brief Create new string from a concatenation of s1 and s2.
+ *
+ * \param s1 First string.
+ * \param s2 Second string.
+ *
+ * \retval Newly allocated string on success.
+ * \retval NULL on error.
+ */
+char* strcdup(const char *s1, const char *s2);
+
+/*!
+ * \brief Normalize file path and expand '~' placeholders.
+ *
+ * \note Old pointer may be freed.
+ *
+ * \retval Pointer to normalized path.
+ */
+char* strcpath(char *path);
+
+#endif /* _KNOTD_CONF_H_ */
+
+/*! @} */
diff --git a/src/knot/conf/logconf.c b/src/knot/conf/logconf.c
new file mode 100644
index 0000000..a57afd9
--- /dev/null
+++ b/src/knot/conf/logconf.c
@@ -0,0 +1,102 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "knot/other/debug.h"
+#include "knot/conf/logconf.h"
+#include "knot/conf/conf.h"
+#include "knot/other/log.h"
+#include "knot/other/error.h"
+#include "common/lists.h"
+#include "knot/common.h"
+
+int log_conf_hook(const struct conf_t *conf, void *data)
+{
+	// Data not used
+	int ret = 0;
+	UNUSED(data);
+
+	// Check if log declaration exists, otherwise ignore
+	if (conf->logs_count < 1) {
+		return KNOTD_EINVAL;
+	}
+
+	// Find maximum log facility id
+	node *n = 0; size_t files = 0;
+	WALK_LIST(n, conf->logs) {
+		conf_log_t* log = (conf_log_t*)n;
+		if (log->type == LOGT_FILE) {
+			++files;
+		}
+	}
+
+	// Initialize logsystem
+	log_truncate();
+	if ((ret = log_setup(files)) < 0) {
+		return ret;
+	}
+
+	// Setup logs
+	int loaded_sections = 0;
+	n = 0;
+	WALK_LIST(n, conf->logs) {
+
+		// Calculate offset
+		conf_log_t* log = (conf_log_t*)n;
+		int facility = log->type;
+		if (facility == LOGT_FILE) {
+			facility = log_open_file(log->file);
+			if (facility < 0) {
+				log_server_error("Failed to open "
+				                 "logfile '%s'.\n", log->file);
+				continue;
+			}
+		}
+
+		// Auto-assign fatal errors to syslog or stderr
+		if (facility <= LOGT_STDERR) {
+			int mask = LOG_MASK(LOG_FATAL);
+			log_levels_add(facility, LOG_ANY, mask);
+			loaded_sections |= 1 << facility;
+		}
+
+		// Setup sources mapping
+		node *m = 0;
+		WALK_LIST(m, log->map) {
+
+			// Assign mapped level
+			conf_log_map_t *map = (conf_log_map_t*)m;
+			log_levels_add(facility, map->source, map->prios);
+		}
+	}
+
+	// Load defaults for syslog or stderr
+	int bmask = LOG_MASK(LOG_ERR)|LOG_MASK(LOG_FATAL);
+	if (!(loaded_sections & (1 << LOGT_SYSLOG))) {
+		log_levels_set(LOGT_SYSLOG, LOG_ANY, bmask);
+	}
+	if (!(loaded_sections & (1 << LOGT_STDERR))) {
+		log_levels_set(LOGT_STDERR, LOG_ANY, bmask);
+	}
+
+	return KNOTD_EOK;
+}
+
diff --git a/src/knot/conf/logconf.h b/src/knot/conf/logconf.h
new file mode 100644
index 0000000..7b9e054
--- /dev/null
+++ b/src/knot/conf/logconf.h
@@ -0,0 +1,45 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file log.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Logging facility (configuration file interface).
+ *
+ * \addtogroup logging
+ * @{
+ */
+
+#ifndef _KNOTD_LOGCONF_H_
+#define _KNOTD_LOGCONF_H_
+
+struct conf_t;
+
+/*!
+ * \brief Setup logging facilities from config.
+ *
+ * \see syslog.h
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOMEM out of memory error.
+ */
+int log_conf_hook(const struct conf_t *conf, void *data);
+
+#endif /* _KNOTD_LOGCONF_H_ */
+
+/*! @} */
diff --git a/src/knot/ctl/knotc_main.c b/src/knot/ctl/knotc_main.c
new file mode 100644
index 0000000..16c3863
--- /dev/null
+++ b/src/knot/ctl/knotc_main.c
@@ -0,0 +1,658 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <sys/select.h>
+#include <sys/stat.h>
+#include <getopt.h>
+
+#include "knot/common.h"
+#include "knot/other/error.h"
+#include "knot/ctl/process.h"
+#include "knot/conf/conf.h"
+#include "knot/conf/logconf.h"
+#include "knot/zone/zone-load.h"
+
+/*! \brief Controller constants. */
+enum knotc_constants_t {
+	WAITPID_TIMEOUT = 10 /*!< \brief Timeout for waiting for process. */
+};
+
+/*! \brief Print help. */
+void help(int argc, char **argv)
+{
+	printf("Usage: %sc [parameters] start|stop|restart|reload|running|"
+	       "compile\n", PACKAGE_NAME);
+	printf("Parameters:\n"
+	       " -c [file], --config=[file] Select configuration file.\n"
+	       " -j [num], --jobs=[num]     Number of parallel tasks to run (only for 'compile').\n"
+	       " -f, --force                Force operation - override some checks.\n"
+	       " -v, --verbose              Verbose mode - additional runtime information.\n"
+	       " -V, --version              Print %s server version.\n"
+	       " -w, --wait                 Wait for the server to finish start/stop operations.\n"
+	       " -i, --interactive          Interactive mode (do not daemonize).\n"
+	       " -h, --help                 Print help and usage.\n",
+	       PACKAGE_NAME);
+	printf("Actions:\n"
+	       " start     Start %s server zone (no-op if running).\n"
+	       " stop      Stop %s server (no-op if not running).\n"
+	       " restart   Stops and then starts %s server.\n"
+	       " reload    Reload %s configuration and compiled zones.\n"
+	       " running   check if server is running.\n"
+	       "\n"
+	       " compile   Compile zone file.\n",
+	       PACKAGE_NAME, PACKAGE_NAME, PACKAGE_NAME, PACKAGE_NAME);
+}
+
+/*!
+ * \brief Check if the zone needs recompilation.
+ *
+ * \param db Path to zone db file.
+ * \param source Path to zone source file.
+ *
+ * \retval KNOTD_EOK if up to date.
+ * \retval KNOTD_ERROR if needs recompilation.
+ */
+int check_zone(const char *db, const char* source)
+{
+	/* Check zonefile. */
+	struct stat st;
+	if (stat(source, &st) != 0) {
+		fprintf(stderr, "Zone file '%s' doesn't exist.\n", source);
+		return KNOTD_ENOENT;
+	}
+
+	/* Read zonedb header. */
+	zloader_t *zl = 0;
+	knot_zload_open(&zl, db);
+	if (!zl) {
+		return KNOTD_ERROR;
+	}
+
+	/* Check source files and mtime. */
+	int ret = KNOTD_ERROR;
+	int src_changed = strcmp(source, zl->source) != 0;
+	if (!src_changed && !knot_zload_needs_update(zl)) {
+		ret = KNOTD_EOK;
+	}
+
+	knot_zload_close(zl);
+	return ret;
+}
+
+pid_t wait_cmd(pid_t proc, int *rc)
+{
+	/* Wait for finish. */
+	sigset_t newset;
+	sigfillset(&newset);
+	sigprocmask(SIG_BLOCK, &newset, 0);
+	proc = waitpid(proc, rc, 0);
+	sigprocmask(SIG_UNBLOCK, &newset, 0);
+	return proc;
+}
+
+pid_t start_cmd(const char *argv[], int argc)
+{
+	pid_t chproc = fork();
+	if (chproc == 0) {
+
+		/* Duplicate, it doesn't run from stack address anyway. */
+		char **args = malloc((argc + 1) * sizeof(char*));
+		memset(args, 0, (argc + 1) * sizeof(char*));
+		int ci = 0;
+		for (int i = 0; i < argc; ++i) {
+			if (strlen(argv[i]) > 0) {
+				args[ci++] = strdup(argv[i]);
+			}
+		}
+		args[ci] = 0;
+
+		/* Execute command. */
+		fflush(stdout);
+		fflush(stderr);
+		execvp(args[0], args);
+
+		/* Execute failed. */
+		fprintf(stderr, "Failed to run executable '%s'\n", args[0]);
+		for (int i = 0; i < argc; ++i) {
+			free(args[i]);
+		}
+		free(args);
+
+		exit(1);
+		return -1;
+	}
+	
+	return chproc;
+}
+
+int exec_cmd(const char *argv[], int argc)
+{
+	int ret = 0;
+	pid_t proc = start_cmd(argv, argc);
+	wait_cmd(proc, &ret);
+	return ret;
+}
+
+/*! \brief Zone compiler task. */
+typedef struct {
+	conf_zone_t *zone;
+	pid_t proc;
+} knotc_zctask_t;
+
+/*! \brief Create set of watched tasks. */
+knotc_zctask_t *zctask_create(int count)
+{
+	if (count <= 0) {
+		return 0;
+	}
+	
+	knotc_zctask_t *t = malloc(count * sizeof(knotc_zctask_t));
+	for (unsigned i = 0; i < count; ++i) {
+		t[i].proc = -1;
+		t[i].zone = 0;
+	}
+	
+	return t;
+}
+
+/*! \brief Wait for single task to finish. */
+int zctask_wait(knotc_zctask_t *tasks, int count)
+{
+	/* Wait for children to finish. */
+	int rc = 0;
+	pid_t pid = wait_cmd(-1, &rc);
+	
+	/* Find task. */
+	conf_zone_t *z = 0;
+	for (unsigned i = 0; i < count; ++i) {
+		if (tasks[i].proc == pid) {
+			tasks[i].proc = -1; /* Invalidate. */
+			z = tasks[i].zone;
+			break;
+		}
+	}
+	
+	if (z == 0) {
+		fprintf(stderr, "error: Failed to find zone for finished "
+		        "zone compilation process.\n");
+		return 1;
+	}
+	
+	/* Evaluate. */
+	if (!WIFEXITED(rc)) {
+		fprintf(stderr, "error: Compilation of '%s' "
+		        "failed, process was killed.\n",
+		        z->name);
+		return 1;
+	} else {
+		if (rc < 0 || WEXITSTATUS(rc) != 0) {
+			fprintf(stderr, "error: Compilation of "
+			        "'%s' failed, knot-zcompile "
+			        "return code was '%d'\n",
+			        z->name, WEXITSTATUS(rc));
+			return 1;
+		}
+	}
+	
+	return 0;
+}
+
+/*! \brief Register running zone compilation process. */
+int zctask_add(knotc_zctask_t *tasks, int count, pid_t pid, conf_zone_t *zone)
+{
+	/* Find free space. */
+	for (unsigned i = 0; i < count; ++i) {
+		if (tasks[i].proc == -1) {
+			tasks[i].proc = pid;
+			tasks[i].zone = zone;
+			return 0;
+		}
+	}
+	
+	/* Free space not found. */
+	return -1;
+}
+
+/*!
+ * \brief Execute specified action.
+ *
+ * \param action Action to be executed (start, stop, restart...)
+ * \param argv Additional arguments vector.
+ * \param argc Addition arguments count.
+ * \param pid Specified PID for action.
+ * \param verbose True if running in verbose mode.
+ * \param force True if forced operation is required.
+ * \param wait Wait for the operation to finish.
+ * \param interactive Interactive mode.
+ * \param jobs Number of parallel tasks to run.
+ * \param pidfile Specified PID file for action.
+ *
+ * \retval 0 on success.
+ * \retval error return code for main on error.
+ *
+ * \todo Make enumerated flags instead of many parameters...
+ */
+int execute(const char *action, char **argv, int argc, pid_t pid, int verbose,
+	    int force, int wait, int interactive, int jobs, const char *pidfile)
+{
+	int valid_cmd = 0;
+	int rc = 0;
+	if (strcmp(action, "start") == 0) {
+
+		// Check PID
+		valid_cmd = 1;
+//		if (pid < 0 && pid == KNOT_ERANGE) {
+//			fprintf(stderr, "control: Another server instance "
+//					 "is already starting.\n");
+//			return 1;
+//		}
+		if (pid > 0 && pid_running(pid)) {
+
+			fprintf(stderr, "control: Server PID found, "
+			        "already running.\n");
+
+			if (!force) {
+				return 1;
+			} else {
+				fprintf(stderr, "control: forcing "
+					"server start, killing old pid=%ld.\n",
+					(long)pid);
+				kill(pid, SIGKILL);
+				pid_remove(pidfile);
+			}
+		}
+
+		// Lock configuration
+		conf_read_lock();
+
+		// Prepare command
+		const char *cfg = conf()->filename;
+		const char *args[] = {
+			PROJECT_EXEC,
+			interactive ? "" : "-d",
+			cfg ? "-c" : "",
+			cfg ? cfg : "",
+			verbose ? "-v" : "",
+			argc > 0 ? argv[0] : ""
+		};
+
+		// Unlock configuration
+		conf_read_unlock();
+
+		// Execute command
+		if (interactive) {
+			printf("control: Running in interactive mode.\n");
+			fflush(stderr);
+			fflush(stdout);
+		}
+		if ((rc = exec_cmd(args, 6)) < 0) {
+			pid_remove(pidfile);
+			rc = 1;
+		}
+		fflush(stderr);
+		fflush(stdout);
+
+		// Wait for finish
+		if (wait && !interactive) {
+			if (verbose) {
+				fprintf(stdout, "control: waiting for server "
+						"to load.\n");
+			}
+			/* Periodically read pidfile and wait for
+			 * valid result. */
+			pid = 0;
+			while(pid == 0 || !pid_running(pid)) {
+				pid = pid_read(pidfile);
+				struct timeval tv;
+				tv.tv_sec = 0;
+				tv.tv_usec = 500 * 1000;
+				select(0, 0, 0, 0, &tv);
+			}
+		}
+	}
+	if (strcmp(action, "stop") == 0) {
+
+		// Check PID
+		valid_cmd = 1;
+		rc = 0;
+		if (pid <= 0 || !pid_running(pid)) {
+			fprintf(stderr, "Server PID not found, "
+			        "probably not running.\n");
+
+			if (!force) {
+				rc = 1;
+			} else {
+				fprintf(stderr, "control: forcing "
+				        "server stop.\n");
+			}
+		}
+
+		// Stop
+		if (rc == 0) {
+			if (kill(pid, SIGTERM) < 0) {
+				pid_remove(pidfile);
+				rc = 1;
+			}
+		}
+
+		// Wait for finish
+		if (rc == 0 && wait) {
+			if (verbose) {
+				fprintf(stdout, "control: waiting for server "
+						"to stop.\n");
+			}
+			/* Periodically read pidfile and wait for
+			 * valid result. */
+			while(pid_running(pid)) {
+				struct timeval tv;
+				tv.tv_sec = 0;
+				tv.tv_usec = 500 * 1000;
+				select(0, 0, 0, 0, &tv);
+			}
+		}
+	}
+	if (strcmp(action, "restart") == 0) {
+		valid_cmd = 1;
+		execute("stop", argv, argc, pid, verbose, force, wait,
+			interactive, jobs, pidfile);
+
+		int i = 0;
+		while((pid = pid_read(pidfile)) > 0) {
+
+			if (!pid_running(pid)) {
+				pid_remove(pidfile);
+				break;
+			}
+			if (i == WAITPID_TIMEOUT) {
+				fprintf(stderr, "Timeout while "
+				        "waiting for the server to finish.\n");
+				//pid_remove(pidfile);
+				break;
+			} else {
+				sleep(1);
+				++i;
+			}
+		}
+
+		printf("Restarting server.\n");
+		rc = execute("start", argv, argc, -1, verbose, force, wait,
+			     interactive, jobs, pidfile);
+	}
+	if (strcmp(action, "reload") == 0) {
+
+		// Check PID
+		valid_cmd = 1;
+		if (pid <= 0 || !pid_running(pid)) {
+			fprintf(stderr, "Server PID not found, "
+			        "probably not running.\n");
+
+			if (force) {
+				fprintf(stderr, "control: forcing "
+				        "server stop.\n");
+			} else {
+				return 1;
+			}
+		}
+
+		// Stop
+		if (kill(pid, SIGHUP) < 0) {
+			pid_remove(pidfile);
+			rc = 1;
+		}
+	}
+	if (strcmp(action, "running") == 0) {
+
+		// Check PID
+		valid_cmd = 1;
+		if (pid <= 0) {
+			printf("Server PID not found, "
+			       "probably not running.\n");
+			rc = 1;
+		} else {
+			if (!pid_running(pid)) {
+				printf("Server PID not found, "
+				       "probably not running.\n");
+				fprintf(stderr,
+				        "warning: PID file is stale.\n");
+			} else {
+				printf("Server running as PID %ld.\n",
+				       (long)pid);
+			}
+			rc = 0;
+		}
+	}
+	if (strcmp(action, "compile") == 0) {
+		
+		// Print job count
+		if (jobs > 1) {
+			printf("warning: Will attempt to compile %d zones "
+			       "in parallel, this increases memory consumption "
+			       "for large zones.\n", jobs);
+		}
+
+		// Check zone
+		valid_cmd = 1;
+
+		// Lock configuration
+		conf_read_lock();
+
+		// Generate databases for all zones
+		node *n = 0;
+		int running = 0;
+		knotc_zctask_t *tasks = zctask_create(jobs);
+		WALK_LIST(n, conf()->zones) {
+
+			// Fetch zone
+			conf_zone_t *zone = (conf_zone_t*)n;
+
+			// Check source files and mtime
+			int zone_status = check_zone(zone->db, zone->file);
+			if (zone_status == KNOTD_EOK) {
+				printf("Zone '%s' is up-to-date.\n",
+				       zone->name);
+
+				if (force) {
+					fprintf(stderr, "control: forcing "
+						"zone recompilation.\n");
+				} else {
+					continue;
+				}
+			}
+
+			// Check for not existing source
+			if (zone_status == KNOTD_ENOENT) {
+				continue;
+			}
+			
+			/* Evaluate space for new task. */
+			if (running == jobs) {
+				zctask_wait(tasks, jobs);
+				--running;
+			}
+
+			const char *args[] = {
+				ZONEPARSER_EXEC,
+				zone->enable_checks ? "-s" : "",
+				verbose ? "-v" : "",
+				"-o",
+				zone->db,
+			        zone->name,
+				zone->file
+			};
+
+			// Execute command
+			if (verbose) {
+				printf("Compiling '%s' as '%s'...\n",
+				       zone->name, zone->db);
+			}
+			fflush(stdout);
+			fflush(stderr);
+			pid_t zcpid = start_cmd(args, 7);
+			zctask_add(tasks, jobs, zcpid, zone);
+			++running;
+		}
+		
+		/* Wait for all running tasks. */
+		while (running > 0) {
+			zctask_wait(tasks, jobs);
+			--running;
+		}
+		free(tasks);
+
+		// Unlock configuration
+		conf_read_unlock();
+	}
+	if (!valid_cmd) {
+		fprintf(stderr, "Invalid command: '%s'\n", action);
+		return 1;
+	}
+
+	// Log
+	if (verbose) {
+		printf("'%s' finished (return code %d)\n", action, rc);
+	}
+	return rc;
+}
+
+int main(int argc, char **argv)
+{
+	// Parse command line arguments
+	int c = 0, li = 0;
+	int force = 0;
+	int verbose = 0;
+	int wait = 0;
+	int interactive = 0;
+	int jobs = 1;
+	const char* config_fn = 0;
+	
+	/* Long options. */
+	struct option opts[] = {
+		{"wait",        no_argument,       0, 'w'},
+		{"force",       no_argument,       0, 'f'},
+		{"config",      required_argument, 0, 'c'},
+		{"verbose",     no_argument,       0, 'v'},
+		{"interactive", no_argument,       0, 'i'},
+		{"jobs",        required_argument, 0, 'c'},
+		{"version",     no_argument,       0, 'V'},
+		{"help",        no_argument,       0, 'h'},
+		{0, 0, 0, 0}
+	};
+	
+	while ((c = getopt_long(argc, argv, "wfc:vij:Vh", opts, &li)) != -1) {
+		switch (c)
+		{
+		case 'w':
+			wait = 1;
+			break;
+		case 'f':
+			force = 1;
+			break;
+		case 'c':
+			config_fn = optarg;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'i':
+			interactive = 1;
+			break;
+		case 'j':
+			jobs = atoi(optarg);
+			if (jobs < 1) {
+				fprintf(stderr, "Invalid parameter '%s' to "
+				        "'-j', expects number <1..n>\n",
+				        optarg);
+				help(argc, argv);
+				return 1;
+			}
+			break;
+		case 'V':
+			printf("%s, version %s\n", "Knot DNS", PACKAGE_VERSION);
+			return 0;
+		case 'h':
+		case '?':
+		default:
+			help(argc, argv);
+			return 1;
+		}
+	}
+
+	// Check if there's at least one remaining non-option
+	if (argc - optind < 1) {
+		help(argc, argv);
+		return 1;
+	}
+
+	// Initialize log (no output)
+	log_init();
+	log_levels_set(LOGT_SYSLOG, LOG_ANY, 0);
+	log_levels_set(LOGT_STDOUT, LOG_ANY, 0);
+	closelog();
+
+	// Find implicit configuration file
+	char *default_fn = 0;
+	if (!config_fn) {
+		default_fn = conf_find_default();
+		config_fn = default_fn;
+	}
+
+	// Open configuration
+	if (conf_open(config_fn) != 0) {
+		fprintf(stderr, "Failed to parse configuration '%s'.\n",
+		        config_fn);
+		free(default_fn);
+		return 1;
+	}
+
+	// Free default config filename if exists
+	free(default_fn);
+
+	// Verbose mode
+	if (verbose) {
+		int mask = LOG_MASK(LOG_INFO)|LOG_MASK(LOG_DEBUG);
+		log_levels_add(LOGT_STDOUT, LOG_ANY, mask);
+	}
+
+	// Fetch PID
+	char* pidfile = pid_filename();
+	if (!pidfile) {
+		fprintf(stderr, "No configuration found, "
+		        "please specify with '-c' parameter.\n");
+		log_close();
+		return 1;
+	}
+
+	pid_t pid = pid_read(pidfile);
+
+	// Actions
+	const char* action = argv[optind];
+
+	// Execute action
+	int rc = execute(action, argv + optind + 1, argc - optind - 1,
+			 pid, verbose, force, wait, interactive, jobs, pidfile);
+
+	// Finish
+	free(pidfile);
+	log_close();
+	return rc;
+}
diff --git a/src/knot/ctl/process.c b/src/knot/ctl/process.c
new file mode 100644
index 0000000..e46fa37
--- /dev/null
+++ b/src/knot/ctl/process.c
@@ -0,0 +1,126 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+
+#include "knot/common.h"
+#include "knot/ctl/process.h"
+#include "knot/conf/conf.h"
+#include "knot/other/error.h"
+
+char* pid_filename()
+{
+	conf_read_lock();
+
+	/* Read configuration. */
+	char* ret = 0;
+	if (conf()) {
+		ret = strdup(conf()->pidfile);
+	}
+
+	conf_read_unlock();
+
+	return ret;
+}
+
+pid_t pid_read(const char* fn)
+{
+	char buf[64];
+
+	if (fn) {
+		FILE *fp = fopen(fn, "r");
+		if (!fp) {
+			return KNOTD_ENOENT;
+		}
+
+		int readb = 0;
+		int rc = fread(buf, 1, 1, fp);
+		while (rc > 0) {
+			if (++readb == sizeof(buf) - 1) {
+				break;
+			}
+			rc = fread(buf + readb, 1, 1, fp);
+		}
+		buf[readb] = '\0';
+		fclose(fp);
+
+		// Check read result
+		if (readb < 1) {
+			return KNOTD_ENOENT;
+		}
+
+		// Convert pid
+		char* ep = 0;
+		unsigned long pid = strtoul(buf, &ep, 10);
+		if ((errno == ERANGE) || (*ep && !isspace(*ep))) {
+			return KNOTD_ERANGE;
+		}
+
+		return (pid_t)pid;
+	}
+
+	return KNOTD_EINVAL;
+}
+
+int pid_write(const char* fn)
+{
+	if (!fn) {
+		return KNOTD_EINVAL;
+	}
+
+	// Convert
+	char buf[64];
+	int wbytes = 0;
+	wbytes = snprintf(buf, sizeof(buf), "%lu", (unsigned long) getpid());
+	if (wbytes < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Write
+	FILE *fp = fopen(fn, "w");
+	if (fp) {
+		int rc = fwrite(buf, wbytes, 1, fp);
+		fclose(fp);
+		if (rc < 0) {
+			return KNOTD_ERROR;
+		}
+
+		return 0;
+	}
+
+	return KNOTD_ENOENT;
+}
+
+int pid_remove(const char* fn)
+{
+	if (unlink(fn) < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	return KNOTD_EOK;
+}
+
+int pid_running(pid_t pid)
+{
+	return kill(pid, 0) == 0;
+}
+
diff --git a/src/knot/ctl/process.h b/src/knot/ctl/process.h
new file mode 100644
index 0000000..d8f2f4c
--- /dev/null
+++ b/src/knot/ctl/process.h
@@ -0,0 +1,88 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file process.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Functions for POSIX process handling.
+ *
+ * \addtogroup ctl
+ * @{
+ */
+
+#ifndef _KNOTD_PROCESS_H_
+#define _KNOTD_PROCESS_H_
+
+#include <unistd.h>
+
+/*!
+ * \brief Return a filename of the default compiled database file.
+ *
+ * \retval Filename of the database file.
+ * \retval NULL if not exists.
+ */
+char* pid_filename();
+
+/*!
+ * \brief Read PID from given file.
+ *
+ * \param fn Filename containing PID.
+ *
+ * \retval PID on success (positive integer).
+ * \retval KNOTD_EINVAL on null path.
+ * \retval KNOTD_ENOENT if the filename content cannot be read.
+ * \retval KNOTD_ERANGE if the stored PID is out of range.
+ */
+pid_t pid_read(const char* fn);
+
+/*!
+ * \brief Write PID to given file.
+ *
+ * \param fn Filename containing PID.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on null path.
+ * \retval KNOTD_ENOENT filename cannot be opened for writing.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int pid_write(const char* fn);
+
+/*!
+ * \brief Remove file containing PID.
+ *
+ * \param fn Filename containing PID.
+ *
+ * \warning Filename content won't be checked.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL failed to remove filename.
+ */
+int pid_remove(const char* fn);
+
+/*!
+ * \brief Return true if the PID is running.
+ *
+ * \param pid Process ID.
+ *
+ * \retval 1 if running.
+ * \retval 0 if not running (or error).
+ */
+int pid_running(pid_t pid);
+
+#endif // _KNOTD_PROCESS_H_
+
+/*! @} */
diff --git a/src/knot/main.c b/src/knot/main.c
new file mode 100644
index 0000000..4091055
--- /dev/null
+++ b/src/knot/main.c
@@ -0,0 +1,336 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+#include "common.h"
+
+#include "knot/common.h"
+#include "knot/other/error.h"
+#include "knot/server/server.h"
+#include "zcompile/zcompile.h"
+#include "knot/ctl/process.h"
+#include "knot/conf/conf.h"
+#include "knot/conf/logconf.h"
+#include "common/evqueue.h"
+#include "knot/server/zones.h"
+
+/*----------------------------------------------------------------------------*/
+
+/* Signal flags. */
+static volatile short sig_req_stop = 0;
+static volatile short sig_req_reload = 0;
+static volatile short sig_stopping = 0;
+
+// SIGINT signal handler
+void interrupt_handle(int s)
+{
+	// Reload configuration
+	if (s == SIGHUP) {
+		sig_req_reload = 1;
+		return;
+	}
+
+	// Stop server
+	if (s == SIGINT || s == SIGTERM) {
+		if (sig_stopping == 0) {
+			sig_req_stop = 1;
+			sig_stopping = 1;
+		} else {
+			log_server_notice("OK! Exiting immediately.\n");
+			exit(1);
+		}
+	}
+}
+
+void help(int argc, char **argv)
+{
+	printf("Usage: %sd [parameters]\n",
+	       PACKAGE_NAME);
+	printf("Parameters:\n"
+	       " -c, --config [file] Select configuration file.\n"
+	       " -d, --daemonize     Run server as a daemon.\n"
+	       " -v, --verbose       Verbose mode - additional runtime information.\n"
+	       " -V, --version       Print version of the server.\n"
+	       " -h, --help          Print help and usage.\n");
+}
+
+int main(int argc, char **argv)
+{
+	// Parse command line arguments
+	int c = 0, li = 0;
+	int verbose = 0;
+	int daemonize = 0;
+	char* config_fn = 0;
+	
+	/* Long options. */
+	struct option opts[] = {
+		{"config",    required_argument, 0, 'c'},
+		{"daemonize", no_argument,       0, 'd'},
+		{"verbose",   no_argument,       0, 'v'},
+		{"version",   no_argument,       0, 'V'},
+		{"help",      no_argument,       0, 'h'},
+		{0, 0, 0, 0}
+	};
+	
+	while ((c = getopt_long(argc, argv, "c:dvVh", opts, &li)) != -1) {
+		switch (c)
+		{
+		case 'c':
+			config_fn = strdup(optarg);
+			break;
+		case 'd':
+			daemonize = 1;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'V':
+			printf("%s, version %s\n", "Knot DNS", PACKAGE_VERSION);
+			return 0;
+		case 'h':
+		case '?':
+		default:
+			help(argc, argv);
+			return 1;
+		}
+	}
+
+	// Now check if we want to daemonize
+	if (daemonize) {
+		if (daemon(1, 0) != 0) {
+			fprintf(stderr, "Daemonization failed, "
+					"shutting down...\n");
+			return 1;
+		}
+	}
+
+	// Register service and signal handler
+	struct sigaction emptyset;
+	emptyset.sa_handler = interrupt_handle;
+	sigemptyset(&emptyset.sa_mask);
+	emptyset.sa_flags = 0;
+	sigaction(SIGALRM, &emptyset, NULL); // Interrupt
+
+	// Setup event queue
+	evqueue_set(evqueue_new());
+
+	// Initialize log
+	log_init();
+
+	// Verbose mode
+	if (verbose) {
+		int mask = LOG_MASK(LOG_INFO)|LOG_MASK(LOG_DEBUG);
+		log_levels_add(LOGT_STDOUT, LOG_ANY, mask);
+	}
+
+	// Initialize pseudorandom number generator
+	srand(time(0));
+
+	// Create server
+	server_t *server = server_create();
+
+	// Initialize configuration
+	conf_read_lock();
+	conf_add_hook(conf(), CONF_LOG, log_conf_hook, 0);
+	conf_add_hook(conf(), CONF_LOG, zones_ns_conf_hook, server->nameserver);
+	conf_add_hook(conf(), CONF_LOG, server_conf_hook, server);
+	conf_read_unlock();
+
+	// Find implicit configuration file
+	if (!config_fn) {
+		config_fn = conf_find_default();
+	}
+
+	// Find absolute path for config file
+	if (config_fn[0] != '/')
+	{
+		// Get absolute path to cwd
+		size_t cwbuflen = 64;
+		char *cwbuf = malloc((cwbuflen + 2) * sizeof(char));
+		while (getcwd(cwbuf, cwbuflen) == 0) {
+			cwbuflen *= 2;
+			cwbuf = realloc(cwbuf, (cwbuflen + 2) * sizeof(char));
+		}
+		cwbuflen = strlen(cwbuf);
+
+		// Append ending slash
+		if (cwbuf[cwbuflen - 1] != '/') {
+			cwbuf = strcat(cwbuf, "/");
+		}
+
+		// Assemble path to config file
+		char *abs_cfg = strcdup(cwbuf, config_fn);
+		free(config_fn);
+		free(cwbuf);
+		config_fn = abs_cfg;
+	}
+
+	// Open configuration
+	log_server_info("Parsing configuration '%s' ...\n", config_fn);
+	if (conf_open(config_fn) != KNOTD_EOK) {
+
+		log_server_error("Failed to parse configuration file '%s'.\n",
+				 config_fn);
+		server_destroy(&server);
+		free(config_fn);
+		return 1;
+	} else {
+		log_server_info("Configured %d interfaces and %d zones.\n",
+				conf()->ifaces_count, conf()->zones_count);
+	}
+	log_server_info("\n");
+
+	// Create server instance
+	char* pidfile = pid_filename();
+
+	// Run server
+	int res = 0;
+	log_server_info("Starting server...\n");
+	if ((res = server_start(server)) == KNOTD_EOK) {
+
+		// Save PID
+		int has_pid = 1;
+		int rc = pid_write(pidfile);
+		if (rc < 0) {
+			has_pid = 0;
+			log_server_warning("Failed to create "
+					   "PID file '%s'.\n", pidfile);
+		}
+
+		// Change directory if daemonized
+		if (daemonize) {
+			log_server_info("Server started as a daemon, "
+					"PID = %ld\n", (long)getpid());
+			res = chdir("/");
+		} else {
+			log_server_info("Server started in foreground, "
+					"PID = %ld\n", (long)getpid());
+		}
+		if (has_pid) {
+			log_server_info("PID stored in %s\n", pidfile);
+		} else {
+			log_server_warning("Server running without PID file.\n");
+		}
+		size_t zcount = server->nameserver->zone_db->zone_count;
+		if (!zcount) {
+			log_server_warning("Server started, but no zones served.\n");
+		}
+
+		// Setup signal handler
+		struct sigaction sa;
+		memset(&sa, 0, sizeof(sa));
+		sa.sa_handler = interrupt_handle;
+		sigemptyset(&sa.sa_mask);
+		sigaction(SIGINT,  &sa, NULL);
+		sigaction(SIGTERM, &sa, NULL);
+		sigaction(SIGHUP,  &sa, NULL);
+		sa.sa_flags = 0;
+		pthread_sigmask(SIG_BLOCK, &sa.sa_mask, NULL);
+
+		/* Run event loop. */
+		for(;;) {
+			pthread_sigmask(SIG_UNBLOCK, &sa.sa_mask, NULL);
+			int ret = evqueue_poll(evqueue(), 0, 0);
+			pthread_sigmask(SIG_BLOCK, &sa.sa_mask, NULL);
+
+			/* Interrupts. */
+			/*! \todo More robust way to exit evloop.
+			 *        Event loop should exit with a special
+			 *        event.
+			 */
+			if (sig_req_stop) {
+				sig_req_stop = 0;
+				server_stop(server);
+				break;
+			}
+			if (sig_req_reload) {
+				log_server_info("Reloading configuration...\n");
+				sig_req_reload = 0;
+				int cf_ret = cf_ret = conf_open(config_fn);
+				switch (cf_ret) {
+				case KNOTD_EOK:
+					log_server_info("Configuration "
+							"reloaded.\n");
+					break;
+				case KNOTD_ENOENT:
+					log_server_error("Configuration "
+							 "file '%s' "
+							 "not found.\n",
+							 conf()->filename);
+					break;
+				default:
+					log_server_error("Configuration "
+							 "reload failed.\n");
+					break;
+				}
+			}
+
+			/* Events. */
+			if (ret > 0) {
+				event_t ev;
+				if (evqueue_get(evqueue(), &ev) == 0) {
+					dbg_server_verb("Event: "
+					                "received new event.\n");
+					if (ev.cb) {
+						ev.cb(&ev);
+					}
+				}
+			}
+		}
+		pthread_sigmask(SIG_UNBLOCK, &sa.sa_mask, NULL);
+
+		if ((res = server_wait(server)) != KNOTD_EOK) {
+			log_server_error("An error occured while "
+					 "waiting for server to finish.\n");
+		} else {
+			log_server_info("Server finished.\n");
+		}
+
+	} else {
+		log_server_fatal("An error occured while "
+				 "starting the server.\n");
+	}
+
+	// Stop server and close log
+	server_destroy(&server);
+
+	// Remove PID file
+	if (pid_remove(pidfile) < 0) {
+		log_server_warning("Failed to remove PID file.\n");
+	}
+
+	log_server_info("Shut down.\n");
+	log_close();
+	free(pidfile);
+
+	// Destroy event loop
+	evqueue_t *q = evqueue();
+	evqueue_free(&q);
+
+	// Free default config filename if exists
+	free(config_fn);
+
+	if (!daemonize) {
+		fflush(stdout);
+		fflush(stderr);
+	}
+
+	return res;
+}
diff --git a/src/knot/other/debug.h b/src/knot/other/debug.h
new file mode 100644
index 0000000..aa80373
--- /dev/null
+++ b/src/knot/other/debug.h
@@ -0,0 +1,426 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file other/debug.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Debugging facility, uses log.h.
+ *
+ * \addtogroup debugging
+ * @{
+ */
+
+#ifndef _KNOTD_DEBUG_H_
+#define _KNOTD_DEBUG_H_
+
+#include "config.h" /* autoconf generated */
+
+#include "knot/other/log.h"
+#include "common/print.h"
+
+/*! \todo Set these during configure as well. */
+//#define KNOTD_SERVER_DEBUG
+//#define KNOTD_THREADS_DEBUG
+//#define KNOTD_JOURNAL_DEBUG
+//#define KNOTD_NET_DEBUG
+//#define KNOTD_ZONES_DEBUG
+//#define KNOTD_XFR_DEBUG
+//#define KNOTD_NOTIFY_DEBUG
+//#define KNOTD_ZDUMP_DEBUG
+//#define KNOTD_ZLOAD_DEBUG
+
+/******************************************************************************/
+
+#ifdef KNOTD_NOTIFY_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_notify(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_notify_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_notify(msg...)
+#define dbg_notify_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_notify_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_notify_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_notify_verb(msg...)
+#define dbg_notify_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_notify_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_notify_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_notify_detail(msg...)
+#define dbg_notify_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_notify(msg...)
+#define dbg_notify_hex(data, len)
+#define dbg_notify_verb(msg...)
+#define dbg_notify_hex_verb(data, len)
+#define dbg_notify_detail(msg...)
+#define dbg_notify_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_SERVER_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_server(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_server_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_server(msg...)
+#define dbg_server_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_server_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_server_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_server_verb(msg...)
+#define dbg_server_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_server_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_server_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_server_detail(msg...)
+#define dbg_server_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_server(msg...)
+#define dbg_server_hex(data, len)
+#define dbg_server_verb(msg...)
+#define dbg_server_hex_verb(data, len)
+#define dbg_server_detail(msg...)
+#define dbg_server_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_NET_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_net(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_net_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_net(msg...)
+#define dbg_net_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_net_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_net_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_net_verb(msg...)
+#define dbg_net_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_net_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_net_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_net_detail(msg...)
+#define dbg_net_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_net(msg...)
+#define dbg_net_hex(data, len)
+#define dbg_net_verb(msg...)
+#define dbg_net_hex_verb(data, len)
+#define dbg_net_detail(msg...)
+#define dbg_net_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_THREADS_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_dt(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_dt_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_dt(msg...)
+#define dbg_dt_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_dt_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_dt_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_dt_verb(msg...)
+#define dbg_dt_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_dt_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_dt_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_dt_detail(msg...)
+#define dbg_dt_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_dt(msg...)
+#define dbg_dt_hex(data, len)
+#define dbg_dt_verb(msg...)
+#define dbg_dt_hex_verb(data, len)
+#define dbg_dt_detail(msg...)
+#define dbg_dt_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_JOURNAL_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_journal(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_journal_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_journal(msg...)
+#define dbg_journal_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_journal_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_journal_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_journal_verb(msg...)
+#define dbg_journal_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_journal_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_journal_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_journal_detail(msg...)
+#define dbg_journal_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_journal(msg...)
+#define dbg_journal_hex(data, len)
+#define dbg_journal_verb(msg...)
+#define dbg_journal_hex_verb(data, len)
+#define dbg_journal_detail(msg...)
+#define dbg_journal_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_ZONES_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_zones(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zones_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#define dbg_zones_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_zones(msg...)
+#define dbg_zones_hex(data, len)
+#define dbg_zones_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_zones_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zones_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#define dbg_zones_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_zones_verb(msg...)
+#define dbg_zones_hex_verb(data, len)
+#define dbg_zones_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_zones_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zones_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#define dbg_zones_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_zones_detail(msg...)
+#define dbg_zones_hex_detail(data, len)
+#define dbg_zones_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_zones(msg...)
+#define dbg_zones_hex(data, len)
+#define dbg_zones_verb(msg...)
+#define dbg_zones_hex_verb(data, len)
+#define dbg_zones_detail(msg...)
+#define dbg_zones_hex_detail(data, len)
+#define dbg_zones_exec(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_XFR_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_xfr(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_xfr_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_xfr(msg...)
+#define dbg_xfr_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_xfr_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_xfr_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_xfr_verb(msg...)
+#define dbg_xfr_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_xfr_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_xfr_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_xfr_detail(msg...)
+#define dbg_xfr_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_xfr(msg...)
+#define dbg_xfr_hex(data, len)
+#define dbg_xfr_verb(msg...)
+#define dbg_xfr_hex_verb(data, len)
+#define dbg_xfr_detail(msg...)
+#define dbg_xfr_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_ZDUMP_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_zdump(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zdump_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zdump(msg...)
+#define dbg_zdump_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_zdump_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zdump_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zdump_verb(msg...)
+#define dbg_zdump_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_zdump_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zdump_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zdump_detail(msg...)
+#define dbg_zdump_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_zdump(msg...)
+#define dbg_zdump_hex(data, len)
+#define dbg_zdump_verb(msg...)
+#define dbg_zdump_hex_verb(data, len)
+#define dbg_zdump_detail(msg...)
+#define dbg_zdump_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOTD_ZLOAD_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_zload(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zload_hex(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zload(msg...)
+#define dbg_zload_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_zload_verb(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zload_hex_verb(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zload_verb(msg...)
+#define dbg_zload_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_zload_detail(msg...) log_msg(LOG_SERVER, LOG_DEBUG, msg)
+#define dbg_zload_hex_detail(data, len) hex_log(LOG_SERVER, (data), (len))
+#else
+#define dbg_zload_detail(msg...)
+#define dbg_zload_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_zload(msg...)
+#define dbg_zload_hex(data, len)
+#define dbg_zload_verb(msg...)
+#define dbg_zload_hex_verb(data, len)
+#define dbg_zload_detail(msg...)
+#define dbg_zload_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#endif /* _KNOTD_DEBUG_H_ */
+
+/*! @} */
diff --git a/src/knot/other/error.c b/src/knot/other/error.c
new file mode 100644
index 0000000..a149966
--- /dev/null
+++ b/src/knot/other/error.c
@@ -0,0 +1,46 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "knot/other/error.h"
+#include "common/errors.h"
+
+const error_table_t knotd_error_msgs[] = {
+
+	/* Mapped errors. */
+	{KNOTD_EOK, "OK"},
+	{KNOTD_ENOMEM, "Not enough memory."},
+	{KNOTD_EINVAL, "Invalid parameter passed."},
+	{KNOTD_ENOTSUP, "Parameter not supported."},
+	{KNOTD_EBUSY,   "Requested resource is busy."},
+	{KNOTD_EAGAIN,  "The system lacked the necessary resource, try again."},
+	{KNOTD_EACCES,  "Permission to perform requested operation is denied."},
+	{KNOTD_ECONNREFUSED, "Connection is refused."},
+	{KNOTD_EISCONN, "Already connected."},
+	{KNOTD_EADDRINUSE, "Address already in use."},
+	{KNOTD_ENOENT, "Resource not found."},
+	{KNOTD_ERANGE, "Value is out of range."},
+
+	/* Custom errors. */
+	{KNOTD_ERROR, "Generic error."},
+	{KNOTD_EZONEINVAL, "Invalid zone file."},
+	{KNOTD_ENOTRUNNING, "Resource is not running."},
+	{KNOTD_EPARSEFAIL, "Parser failed."},
+	{KNOTD_ENOIPV6, "IPv6 support disabled."},
+	{KNOTD_EMALF, "Malformed data."},
+	{KNOTD_ESPACE, "Not enough space provided."},
+        {KNOTD_EEXPIRED, "Resource is expired."},
+	{KNOTD_ERROR, 0}
+};
diff --git a/src/knot/other/error.h b/src/knot/other/error.h
new file mode 100644
index 0000000..65c51cf
--- /dev/null
+++ b/src/knot/other/error.h
@@ -0,0 +1,99 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file other/error.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Error codes and function for getting error message.
+ *
+ * \addtogroup utils
+ * @{
+ */
+
+#ifndef _KNOTD__ERROR_H_
+#define _KNOTD__ERROR_H_
+
+#include <errno.h>
+
+#include "common/errors.h"
+
+/*!
+ * \brief Error codes used in the server.
+ *
+ * Some viable errors are directly mapped
+ * to libc errno codes.
+ */
+enum knot_error_t {
+
+	/* Directly mapped error codes. */
+	KNOTD_EOK = 0,
+	KNOTD_ENOMEM = -ENOMEM, /*!< \brief Out of memory. */
+	KNOTD_EINVAL = -EINVAL, /*!< \brief Invalid parameter passed. */
+	KNOTD_ENOTSUP = -ENOTSUP, /*!< \brief Parameter not supported. */
+	KNOTD_EBUSY = -EBUSY, /*!< \brief Requested resource is busy. */
+	KNOTD_EAGAIN = -EAGAIN, /*!< \brief OS lacked necessary resources. */
+	KNOTD_EACCES = -EACCES, /*!< \brief Permission is denied. */
+	KNOTD_ECONNREFUSED = -ECONNREFUSED, /*!< \brief Connection is refused. */
+	KNOTD_EISCONN = -EISCONN, /*!< \brief Already connected. */
+	KNOTD_EADDRINUSE = -EADDRINUSE, /*!< \brief Address already in use. */
+	KNOTD_ENOENT = -ENOENT, /*!< \brief Resource not found. */
+	KNOTD_ERANGE = -ERANGE, /*!< \brief Value is out of range. */
+
+	/* Custom error codes. */
+	KNOTD_ERROR = -16384, /*!< \brief Generic error. */
+	KNOTD_EZONEINVAL, /*!< \brief Invalid zone file. */
+	KNOTD_ENOTRUNNING, /*!< \brief Resource is not running. */
+	KNOTD_EPARSEFAIL, /*!< \brief Parser fail. */
+	KNOTD_ENOIPV6, /*!< \brief No IPv6 support. */
+	KNOTD_EMALF, /*!< \brief Malformed data. */
+	KNOTD_ESPACE, /*!< \brief Not enough space provided. */
+	KNOTD_EEXPIRED, /*!< \brief Resource is expired. */
+
+	KNOTD_ERROR_COUNT = 21
+};
+
+/*! \brief Table linking error messages to error codes. */
+extern const error_table_t knotd_error_msgs[KNOTD_ERROR_COUNT];
+
+/*!
+ * \brief Returns error message for the given error code.
+ *
+ * \param code Error code.
+ *
+ * \return String containing the error message.
+ */
+static inline const char *knotd_strerror(int code)
+{
+	return error_to_str((const error_table_t*)knotd_error_msgs, code);
+}
+
+/*!
+ * \brief errno mapper that automatically prepends fallback value.
+ *
+ * \see map_errno()
+ *
+ * \param err POSIX errno.
+ * \param ... List of handled codes.
+ *
+ * \return Mapped error code.
+ */
+#define knot_map_errno(err...) map_errno(KNOTD_ERROR, err);
+
+#endif /* _KNOTD__ERROR_H_ */
+
+/*! @} */
diff --git a/src/knot/other/log.c b/src/knot/other/log.c
new file mode 100644
index 0000000..9318d5f
--- /dev/null
+++ b/src/knot/other/log.c
@@ -0,0 +1,305 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "knot/common.h"
+#include "knot/other/error.h"
+#include "knot/other/log.h"
+#include "common/lists.h"
+#include "knot/conf/conf.h"
+
+/*! Log source table. */
+static uint8_t *LOG_FCL = 0;
+static volatile size_t LOG_FCL_SIZE = 0;
+static FILE** LOG_FDS = 0;
+static ssize_t LOG_FDS_OPEN = 0;
+
+#define facility_at(i) (LOG_FCL + ((i) << LOG_SRC_BITS))
+#define facility_next(f) (f) += (1 << LOG_SRC_BITS)
+#define facility_levels(f, i) *((f) + (i))
+
+int log_setup(int logfiles)
+{
+	/* Check facilities count. */
+	if (logfiles < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Ensure minimum facilities count. */
+	int facilities = LOGT_FILE + logfiles;
+
+	/* Reserve space for facilities. */
+	size_t new_size = facilities << LOG_SRC_BITS;
+	LOG_FDS = 0;
+	LOG_FDS_OPEN = 0;
+	LOG_FCL = 0;
+	LOG_FCL_SIZE = 0;
+	LOG_FCL = malloc(new_size);
+	if (!LOG_FCL) {
+		return KNOTD_ENOMEM;
+	}
+
+	/* Reserve space for logfiles. */
+	if (logfiles > 0) {
+		LOG_FDS = malloc(sizeof(FILE*) * logfiles);
+		if (!LOG_FDS) {
+			free(LOG_FCL);
+			LOG_FCL = 0;
+			return KNOTD_ENOMEM;
+		}
+		memset(LOG_FDS, 0, sizeof(FILE*) * logfiles);
+	}
+
+	memset(LOG_FCL, 0, new_size);
+	LOG_FCL_SIZE = new_size; // Assign only when all is set
+	return KNOTD_EOK;
+}
+
+
+
+int log_init()
+{
+	/* Initialize globals. */
+	LOG_FCL = 0;
+	LOG_FCL_SIZE = 0;
+	LOG_FDS = 0;
+	LOG_FDS_OPEN = 0;
+
+	/* Setup initial state. */
+	int ret = KNOTD_EOK;
+	int emask = LOG_MASK(LOG_WARNING)|LOG_MASK(LOG_ERR)|LOG_MASK(LOG_FATAL);
+	int imask = LOG_MASK(LOG_INFO)|LOG_MASK(LOG_NOTICE);
+
+	/* Add debug messages. */
+	emask |= LOG_MASK(LOG_DEBUG);
+
+	ret = log_setup(0);
+	log_levels_set(LOGT_SYSLOG, LOG_ANY, emask);
+	log_levels_set(LOGT_STDERR, LOG_ANY, emask);
+	log_levels_set(LOGT_STDOUT, LOG_ANY, imask);
+
+	/// \todo May change to LOG_DAEMON.
+	setlogmask(LOG_UPTO(LOG_DEBUG));
+	openlog(PACKAGE_NAME, LOG_PID, LOG_DAEMON);
+	return ret;
+}
+
+void log_close()
+{
+	log_truncate();
+	closelog();
+}
+
+void log_truncate()
+{
+	LOG_FCL_SIZE = 0;
+	if (LOG_FCL) {
+		free(LOG_FCL);
+		LOG_FCL = 0;
+	}
+	if (LOG_FDS) {
+
+		/* Close open logfiles. */
+		for (int i = 0; i < LOG_FDS_OPEN; ++i) {
+			fclose(LOG_FDS[i]);
+		}
+
+		free(LOG_FDS);
+		LOG_FDS = 0;
+		LOG_FDS_OPEN = 0;
+	}
+}
+
+int log_isopen()
+{
+	return LOG_FCL_SIZE;
+}
+
+int log_open_file(const char* filename)
+{
+	// Check facility
+	if (unlikely(!LOG_FCL_SIZE || LOGT_FILE + LOG_FDS_OPEN >= LOG_FCL_SIZE)) {
+		return KNOTD_ERROR;
+	}
+
+	// Open file
+	LOG_FDS[LOG_FDS_OPEN] = fopen(filename, "w");
+	if (!LOG_FDS[LOG_FDS_OPEN]) {
+		return KNOTD_EINVAL;
+	}
+
+	// Disable buffering
+	setvbuf(LOG_FDS[LOG_FDS_OPEN], (char *)0, _IONBF, 0);
+
+	return LOGT_FILE + LOG_FDS_OPEN++;
+}
+
+uint8_t log_levels(int facility, logsrc_t src)
+{
+	// Check facility
+	if (unlikely(!LOG_FCL_SIZE || facility >= LOG_FCL_SIZE)) {
+		return 0;
+	}
+
+	return *(LOG_FCL + (facility << LOG_SRC_BITS) + src);
+}
+
+int log_levels_set(int facility, logsrc_t src, uint8_t levels)
+{
+	// Check facility
+	if (unlikely(!LOG_FCL_SIZE || facility >= LOG_FCL_SIZE)) {
+		return KNOTD_EINVAL;
+	}
+
+	// Get facility pointer from offset
+	uint8_t *lp = LOG_FCL + (facility << LOG_SRC_BITS);
+
+	// Assign level if not multimask
+	if (src != LOG_ANY) {
+		*(lp + src) = levels;
+	} else {
+		// Any == set to all sources
+		for (int i = 0; i <= LOG_ANY; ++i) {
+			*(lp + i) = levels;
+		}
+	}
+
+	return KNOTD_EOK;
+}
+
+int log_levels_add(int facility, logsrc_t src, uint8_t levels)
+{
+	uint8_t new_levels = log_levels(facility, src) | levels;
+	return log_levels_set(facility, src, new_levels);
+}
+
+static int _log_msg(logsrc_t src, int level, const char *msg)
+{
+	if(!log_isopen()) {
+		return KNOTD_ERROR;
+	}
+
+	int ret = 0;
+	FILE *stream = stdout;
+	uint8_t *f = facility_at(LOGT_SYSLOG);
+
+	// Syslog
+	if (facility_levels(f, src) & LOG_MASK(level)) {
+		syslog(level, "%s", msg);
+		ret = 1; // To prevent considering the message as ignored.
+	}
+
+	// Convert level to mask
+	level = LOG_MASK(level);
+
+	// Log streams
+	for (int i = LOGT_STDERR; i < LOGT_FILE + LOG_FDS_OPEN; ++i) {
+
+		// Check facility levels mask
+		f = facility_at(i);
+		if (facility_levels(f, src) & level) {
+
+			// Select stream
+			switch(i) {
+			case LOGT_STDERR: stream = stderr; break;
+			case LOGT_STDOUT: stream = stdout; break;
+			default: stream = LOG_FDS[i - LOGT_FILE]; break;
+			}
+
+			// Print
+			ret = fprintf(stream, "%s", msg);
+			if (stream == stdout) {
+				fflush(stream);
+			}
+		}
+	}
+
+	if (ret < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	return ret;
+}
+
+int log_msg(logsrc_t src, int level, const char *msg, ...)
+{
+	/* Buffer for log message. */
+	char sbuf[4096];
+	char *buf = sbuf;
+	int buflen = sizeof(sbuf) - 1;
+
+	/* Prefix error level. */
+	const char *prefix = "";
+	switch (level) {
+	case LOG_DEBUG: break;
+	case LOG_INFO:  break;
+	case LOG_NOTICE:  prefix = "notice: "; break;
+	case LOG_WARNING: prefix = "warning: "; break;
+	case LOG_ERR:     prefix = "error: "; break;
+	case LOG_FATAL:   prefix = "fatal: "; break;
+	default: break;
+	}
+
+	/* Prepend prefix. */
+	int plen = strlen(prefix);
+	if (plen > 0) {
+		strcpy(buf, prefix);
+		buf += plen;
+		buflen -= plen;
+	}
+
+	/* Compile log message. */
+	int ret = 0;
+	va_list ap;
+	va_start(ap, msg);
+	ret = vsnprintf(buf, buflen, msg, ap);
+	va_end(ap);
+
+	/* Send to logging facilities. */
+	if (ret > 0) {
+		ret = _log_msg(src, level, sbuf);
+	}
+
+	return ret;
+}
+
+int log_vmsg(logsrc_t src, int level, const char *msg, va_list ap)
+{
+	int ret = 0;
+	char buf[2048];
+	ret = vsnprintf(buf, sizeof(buf) - 1, msg, ap);
+
+	if (ret > 0) {
+		ret = _log_msg(src, level, buf);
+	}
+
+	return ret;
+}
+
+void hex_log(int source, const char *data, int length)
+{
+	int ptr = 0;
+	for (; ptr < length; ptr++) {
+		log_msg(source, LOG_DEBUG, "0x%02x ",
+		        (unsigned char)*(data + ptr));
+	}
+	log_msg(source, LOG_DEBUG, "\n");
+}
diff --git a/src/knot/other/log.h b/src/knot/other/log.h
new file mode 100644
index 0000000..305020c
--- /dev/null
+++ b/src/knot/other/log.h
@@ -0,0 +1,208 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file log.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Logging facility.
+ *
+ * \note Loglevel defined in syslog.h, may be redefined in other backend, but
+ * keep naming. LOG_FATAL, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG
+ *
+ * In standard mode, only LOG_FATAL, LOG_ERR and LOG_WARNING is logged.
+ * Verbose mode enables LOG_NOTICE and LOG_INFO for additional information.
+ *
+ * \addtogroup logging
+ * @{
+ */
+
+#ifndef _KNOTD_LOG_H_
+#define _KNOTD_LOG_H_
+
+/*
+ */
+#include <syslog.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+/*! \brief Log facility types. */
+typedef enum {
+	LOGT_SYSLOG = 0, /*!< Logging to syslog(3) facility. */
+	LOGT_STDERR = 1, /*!< Print log messages to the stderr. */
+	LOGT_STDOUT = 2, /*!< Print log messages to the stdout. */
+	LOGT_FILE   = 3  /*!< Generic logging to (unbuffered) file on the disk. */
+} logtype_t;
+
+/*! \brief Log sources width (bits). */
+#define LOG_SRC_BITS 3
+
+/*! \brief Log sources (max. LOG_SRC_BITS bits). */
+typedef enum {
+	LOG_SERVER = 0, /*!< Server module. */
+	LOG_ANSWER = 1, /*!< Query answering module. */
+	LOG_ZONE   = 2, /*!< Zone manipulation module. */
+	LOG_ANY    = 7  /*!< Any module. */
+} logsrc_t;
+
+/*! \brief Severity mapping. */
+#define LOG_FATAL LOG_CRIT /*!< Fatal errors cannot be masked. */
+
+/* Logging facility setup. */
+
+/*!
+ * \brief Create logging facilities respecting their
+ *        canonical order.
+ *
+ * Facilities ordering: Syslog, Stderr, Stdout, File0...
+ * \see logtype_t
+ *
+ * \param logfiles Number of extra logfiles.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid number of logfiles (negative).
+ */
+int log_setup(int logfiles);
+
+/*!
+ * \brief Setup logging subsystem.
+ *
+ * \see syslog.h
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ENOMEM out of memory error.
+ */
+int log_init();
+
+/*!
+ * \brief Close and deinitialize log.
+ */
+void log_close();
+
+/*!
+ * \brief Truncate current log setup.
+ */
+void log_truncate();
+
+/*!
+ * \brief Return positive number if open.
+ *
+ * \return 1 if open (boolean true)
+ * \return 0 if closed (boolean false)
+ */
+int log_isopen();
+
+/*!
+ * \brief Open file as a logging facility.
+ *
+ * \param filename File path.
+ *
+ * \retval associated facility index on success.
+ * \retval KNOTD_EINVAL filename cannot be opened for writing.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int log_open_file(const char* filename);
+
+/*!
+ * \brief Return log levels for a given facility.
+ *
+ * \param facility Given log facility index.
+ * \param src Given log source in the context of current facility.
+ *
+ * \retval Associated log level flags on success.
+ * \retval 0 on error.
+ */
+uint8_t log_levels(int facility, logsrc_t src);
+
+/*!
+ * \brief Set log levels for given facility.
+ *
+ * \param facility Logging facility index (LOGT_SYSLOG...).
+ * \param src Logging source (LOG_SERVER...LOG_ANY).
+ * \param levels Bitmask of specified log levels.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters (facility out of range).
+ */
+int log_levels_set(int facility, logsrc_t src, uint8_t levels);
+
+/*!
+ * \brief Add log levels to a given facility.
+ *
+ * New levels are added on top of existing, the resulting
+ * levels set is "old_levels OR new_levels".
+ *
+ * \param facility Logging facility index (LOGT_SYSLOG...).
+ * \param src Logging source (LOG_SERVER...LOG_ANY).
+ * \param levels Bitmask of specified log levels.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters (facility out of range).
+ */
+int log_levels_add(int facility, logsrc_t src, uint8_t levels);
+
+/*!
+ * \brief Log message.
+ *
+ * Function follows printf() format.
+ *
+ * \param src Origin of the message.
+ * \param level Message error level.
+ * \param msg Content of the logged message.
+ *
+ * \retval Number of logged bytes on success.
+ * \retval 0 When the message is ignored.
+ * \retval KNOTD_EINVAL invalid parameters.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int log_msg(logsrc_t src, int level, const char *msg, ...)
+    __attribute__((format(printf, 3, 4)));
+
+/*!
+ * \brief Log message for stdarg.
+ *
+ * \see log_msg
+ */
+int log_vmsg(logsrc_t src, int level, const char *msg, va_list ap);
+
+void hex_log(int source, const char *data, int length);
+
+/* Convenient logging. */
+#define log_server_fatal(msg...)     log_msg(LOG_SERVER, LOG_FATAL, msg)
+#define log_server_error(msg...)     log_msg(LOG_SERVER, LOG_ERR, msg)
+#define log_server_warning(msg...)   log_msg(LOG_SERVER, LOG_WARNING, msg)
+#define log_server_notice(msg...)    log_msg(LOG_SERVER, LOG_NOTICE, msg)
+#define log_server_info(msg...)      log_msg(LOG_SERVER, LOG_INFO, msg)
+#define log_server_debug(msg...)     log_msg(LOG_SERVER, LOG_DEBUG, msg)
+
+#define log_answer_fatal(msg...)     log_msg(LOG_ANSWER, LOG_FATAL, msg)
+#define log_answer_error(msg...)     log_msg(LOG_ANSWER, LOG_ERR, msg)
+#define log_answer_warning(msg...)   log_msg(LOG_ANSWER, LOG_WARNING, msg)
+#define log_answer_notice(msg...)    log_msg(LOG_ANSWER, LOG_NOTICE, msg)
+#define log_answer_info(msg...)      log_msg(LOG_ANSWER, LOG_INFO, msg)
+#define log_answer_debug(msg...)     log_msg(LOG_ANSWER, LOG_DEBUG, msg)
+
+#define log_zone_fatal(msg...)       log_msg(LOG_ZONE, LOG_FATAL, msg)
+#define log_zone_error(msg...)       log_msg(LOG_ZONE, LOG_ERR, msg)
+#define log_zone_warning(msg...)     log_msg(LOG_ZONE, LOG_WARNING, msg)
+#define log_zone_notice(msg...)      log_msg(LOG_ZONE, LOG_NOTICE, msg)
+#define log_zone_info(msg...)        log_msg(LOG_ZONE, LOG_INFO, msg)
+#define log_zone_debug(msg...)       log_msg(LOG_ZONE, LOG_DEBUG, msg)
+
+#endif /* _KNOTD_LOG_H_ */
+
+/*! @} */
diff --git a/src/knot/server/dthreads.c b/src/knot/server/dthreads.c
new file mode 100644
index 0000000..9707e57
--- /dev/null
+++ b/src/knot/server/dthreads.c
@@ -0,0 +1,1006 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "knot/common.h"
+#include "knot/server/dthreads.h"
+#include "knot/other/log.h"
+#include "knot/other/error.h"
+
+/*! \brief Lock thread state for R/W. */
+static inline void lock_thread_rw(dthread_t *thread)
+{
+	pthread_mutex_lock(&thread->_mx);
+}
+/*! \brief Unlock thread state for R/W. */
+static inline void unlock_thread_rw(dthread_t *thread)
+{
+	pthread_mutex_unlock(&thread->_mx);
+}
+
+/*! \brief Signalize thread state change. */
+static inline void unit_signalize_change(dt_unit_t *unit)
+{
+	pthread_mutex_lock(&unit->_report_mx);
+	pthread_cond_signal(&unit->_report);
+	pthread_mutex_unlock(&unit->_report_mx);
+}
+
+/*!
+ * \brief Update thread state with notification.
+ * \param thread Given thread.
+ * \param state New state for thread.
+ * \retval 0 on success.
+ * \retval <0 on error (EINVAL, ENOTSUP).
+ */
+static inline int dt_update_thread(dthread_t *thread, int state)
+{
+	// Check
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Cancel with lone thread
+	dt_unit_t *unit = thread->unit;
+	if (unit == 0) {
+		return KNOTD_ENOTSUP;
+	}
+
+	// Cancel current runnable if running
+	pthread_mutex_lock(&unit->_notify_mx);
+	lock_thread_rw(thread);
+	if (thread->state & (ThreadIdle | ThreadActive)) {
+
+		// Update state
+		thread->state = state;
+		unlock_thread_rw(thread);
+
+		// Notify thread
+		dt_signalize(thread, SIGALRM);
+		pthread_cond_broadcast(&unit->_notify);
+		pthread_mutex_unlock(&unit->_notify_mx);
+	} else {
+		/* Unable to update thread, it is already dead. */
+		unlock_thread_rw(thread);
+		pthread_mutex_unlock(&unit->_notify_mx);
+		return KNOTD_EINVAL;
+	}
+
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Thread entrypoint function.
+ *
+ * When a thread is created and started, it immediately enters this function.
+ * Depending on thread state, it either enters runnable or
+ * blocks until it is awakened.
+ *
+ * This function also handles "ThreadIdle" state to quickly suspend and resume
+ * threads and mitigate thread creation costs. Also, thread runnable may
+ * be changed to alter the thread behavior on runtime
+ */
+static void *thread_ep(void *data)
+{
+	// Check data
+	dthread_t *thread = (dthread_t *)data;
+	if (thread == 0) {
+		return 0;
+	}
+
+	// Check if is a member of unit
+	dt_unit_t *unit = thread->unit;
+	if (unit == 0) {
+		return 0;
+	}
+
+	// Ignore specific signals (except SIGALRM)
+	sigset_t ignset;
+	sigemptyset(&ignset);
+	sigaddset(&ignset, SIGINT);
+	sigaddset(&ignset, SIGTERM);
+	sigaddset(&ignset, SIGHUP);
+	pthread_sigmask(SIG_BLOCK, &ignset, 0); /*! \todo Review under BSD. */
+
+	dbg_dt("dthreads: [%p] entered ep\n", thread);
+
+	// Run loop
+	for (;;) {
+
+		// Check thread state
+		lock_thread_rw(thread);
+		if (thread->state == ThreadDead) {
+			dbg_dt("dthreads: [%p] marked as dead\n", thread);
+			unlock_thread_rw(thread);
+			break;
+		}
+
+		// Update data
+		thread->data = thread->_adata;
+		runnable_t _run = thread->run;
+
+		// Start runnable if thread is marked Active
+		if ((thread->state == ThreadActive) && (thread->run != 0)) {
+			unlock_thread_rw(thread);
+			dbg_dt("dthreads: [%p] entering runnable\n", thread);
+			_run(thread);
+			dbg_dt("dthreads: [%p] exited runnable\n", thread);
+		} else {
+			unlock_thread_rw(thread);
+		}
+
+		// If the runnable was cancelled, start new iteration
+		lock_thread_rw(thread);
+		if (thread->state & ThreadCancelled) {
+			dbg_dt("dthreads: [%p] cancelled\n", thread);
+			thread->state &= ~ThreadCancelled;
+			unlock_thread_rw(thread);
+			continue;
+		}
+		unlock_thread_rw(thread);
+
+		// Runnable finished without interruption, mark as Idle
+		pthread_mutex_lock(&unit->_notify_mx);
+		lock_thread_rw(thread);
+		if (thread->state & ThreadActive) {
+			thread->state &= ~ThreadActive;
+			thread->state |= ThreadIdle;
+		}
+
+		// Go to sleep if idle
+		if (thread->state & ThreadIdle) {
+			unlock_thread_rw(thread);
+
+			// Signalize state change
+			unit_signalize_change(unit);
+
+			// Wait for notification from unit
+			dbg_dt("dthreads: [%p] going idle\n", thread);
+			/*! \todo Check return value. */
+			pthread_cond_wait(&unit->_notify, &unit->_notify_mx);
+			pthread_mutex_unlock(&unit->_notify_mx);
+			dbg_dt("dthreads: [%p] resumed from idle\n", thread);
+		} else {
+			unlock_thread_rw(thread);
+			pthread_mutex_unlock(&unit->_notify_mx);
+		}
+	}
+
+	// Report thread state change
+	dbg_dt("dthreads: [%p] thread finished\n", thread);
+	unit_signalize_change(unit);
+	dbg_dt("dthreads: [%p] thread exited ep\n", thread);
+	lock_thread_rw(thread);
+	thread->state |= ThreadJoinable;
+	unlock_thread_rw(thread);
+
+	// Return
+	return 0;
+}
+
+/*!
+ * \brief Create single thread.
+ * \retval New thread instance on success.
+ * \retval NULL on error.
+ */
+static dthread_t *dt_create_thread(dt_unit_t *unit)
+{
+	// Alloc thread
+	dthread_t *thread = malloc(sizeof(dthread_t));
+	if (thread == 0) {
+		return 0;
+	}
+
+	memset(thread, 0, sizeof(dthread_t));
+
+	// Blank thread state
+	thread->state = ThreadJoined;
+	pthread_mutex_init(&thread->_mx, 0);
+
+	// Set membership in unit
+	thread->unit = unit;
+
+	// Initialize attribute
+	pthread_attr_t *attr = &thread->_attr;
+	pthread_attr_init(attr);
+	pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED);
+	pthread_attr_setschedpolicy(attr, SCHED_OTHER);
+	return thread;
+}
+
+/*! \brief Delete single thread. */
+static void dt_delete_thread(dthread_t **thread)
+{
+	// Check
+	if (thread == 0) {
+		return;
+	}
+	if (*thread == 0) {
+		return;
+	}
+
+	dthread_t* thr = *thread;
+	thr->unit = 0;
+	*thread = 0;
+
+	// Delete attribute
+	pthread_attr_destroy(&(thr)->_attr);
+
+	// Delete mutex
+	pthread_mutex_destroy(&(thr)->_mx);
+
+	// Free memory
+	free(thr);
+}
+
+/*
+ * Public APIs.
+ */
+
+dt_unit_t *dt_create(int count)
+{
+	// Check count
+	if (count <= 0) {
+		return 0;
+	}
+
+	dt_unit_t *unit = malloc(sizeof(dt_unit_t));
+	if (unit == 0) {
+		return 0;
+	}
+
+	// Initialize conditions
+	if (pthread_cond_init(&unit->_notify, 0) != 0) {
+		free(unit);
+		return 0;
+	}
+	if (pthread_cond_init(&unit->_report, 0) != 0) {
+		pthread_cond_destroy(&unit->_notify);
+		free(unit);
+		return 0;
+	}
+
+	// Initialize mutexes
+	if (pthread_mutex_init(&unit->_notify_mx, 0) != 0) {
+		pthread_cond_destroy(&unit->_notify);
+		pthread_cond_destroy(&unit->_report);
+		free(unit);
+		return 0;
+	}
+	if (pthread_mutex_init(&unit->_report_mx, 0) != 0) {
+		pthread_cond_destroy(&unit->_notify);
+		pthread_cond_destroy(&unit->_report);
+		pthread_mutex_destroy(&unit->_notify_mx);
+		free(unit);
+		return 0;
+	}
+	if (pthread_mutex_init(&unit->_mx, 0) != 0) {
+		pthread_cond_destroy(&unit->_notify);
+		pthread_cond_destroy(&unit->_report);
+		pthread_mutex_destroy(&unit->_notify_mx);
+		pthread_mutex_destroy(&unit->_report_mx);
+		free(unit);
+		return 0;
+	}
+
+	// Save unit size
+	unit->size = count;
+
+	// Alloc threads
+	unit->threads = malloc(count * sizeof(dthread_t *));
+	if (unit->threads == 0) {
+		pthread_cond_destroy(&unit->_notify);
+		pthread_cond_destroy(&unit->_report);
+		pthread_mutex_destroy(&unit->_notify_mx);
+		pthread_mutex_destroy(&unit->_report_mx);
+		pthread_mutex_destroy(&unit->_mx);
+		free(unit);
+		return 0;
+	}
+
+	// Initialize threads
+	int init_success = 1;
+	for (int i = 0; i < count; ++i) {
+		unit->threads[i] = dt_create_thread(unit);
+		if (unit->threads[i] == 0) {
+			init_success = 0;
+			break;
+		}
+	}
+
+	// Check thread initialization
+	if (!init_success) {
+
+		// Delete created threads
+		for (int i = 0; i < count; ++i) {
+			dt_delete_thread(&unit->threads[i]);
+		}
+
+		// Free rest of the unit
+		pthread_cond_destroy(&unit->_notify);
+		pthread_cond_destroy(&unit->_report);
+		pthread_mutex_destroy(&unit->_notify_mx);
+		pthread_mutex_destroy(&unit->_report_mx);
+		pthread_mutex_destroy(&unit->_mx);
+		free(unit->threads);
+		free(unit);
+		return 0;
+	}
+
+	return unit;
+}
+
+dt_unit_t *dt_create_coherent(int count, runnable_t runnable, void *data)
+{
+	// Check count
+	if (count <= 0) {
+		return 0;
+	}
+
+	// Create unit
+	dt_unit_t *unit = dt_create(count);
+	if (unit == 0) {
+		return 0;
+	}
+
+	// Set threads common purpose
+	pthread_mutex_lock(&unit->_notify_mx);
+	dt_unit_lock(unit);
+
+	for (int i = 0; i < count; ++i) {
+		dthread_t *thread = unit->threads[i];
+		lock_thread_rw(thread);
+		thread->run = runnable;
+		thread->_adata = data;
+		unlock_thread_rw(thread);
+	}
+
+	dt_unit_unlock(unit);
+	pthread_mutex_unlock(&unit->_notify_mx);
+
+	return unit;
+}
+
+void dt_delete(dt_unit_t **unit)
+{
+	/*
+	 *  All threads must be stopped or idle at this point,
+	 *  or else the behavior is undefined.
+	 *  Sorry.
+	 */
+
+	// Check
+	if (unit == 0) {
+		return;
+	}
+	if (*unit == 0) {
+		return;
+	}
+
+	// Compact and reclaim idle threads
+	dt_unit_t *d_unit = *unit;
+	dt_compact(d_unit);
+
+	// Delete threads
+	for (int i = 0; i < d_unit->size; ++i) {
+		dt_delete_thread(&d_unit->threads[i]);
+	}
+
+	// Deinit mutexes
+	pthread_mutex_destroy(&d_unit->_notify_mx);
+	pthread_mutex_destroy(&d_unit->_report_mx);
+
+	// Deinit conditions
+	pthread_cond_destroy(&d_unit->_notify);
+	pthread_cond_destroy(&d_unit->_report);
+
+	// Free memory
+	free(d_unit->threads);
+	free(d_unit);
+	*unit = 0;
+}
+
+int dt_resize(dt_unit_t *unit, int size)
+{
+	// Check input
+	if (unit == 0 || size <= 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Evaluate delta
+	int delta = unit->size - size;
+
+	// Same size
+	if (delta == 0) {
+		return 0;
+	}
+
+	// Unit expansion
+	if (delta < 0) {
+
+		// Lock unit
+		pthread_mutex_lock(&unit->_notify_mx);
+		dt_unit_lock(unit);
+
+		// Realloc threads
+		dbg_dt("dthreads: growing from %d to %d threads\n",
+		       unit->size, size);
+
+		dthread_t **threads = realloc(unit->threads,
+		                              size * sizeof(dthread_t *));
+		if (threads == NULL) {
+			dt_unit_unlock(unit);
+			pthread_mutex_unlock(&unit->_notify_mx);
+			return -1;
+		}
+
+		// Reassign
+		unit->threads = threads;
+
+		// Create new threads
+		for (int i = unit->size; i < size; ++i) {
+			threads[i] = dt_create_thread(unit);
+		}
+
+		// Update unit
+		unit->size = size;
+		dt_unit_unlock(unit);
+		pthread_mutex_unlock(&unit->_notify_mx);
+		return 0;
+	}
+
+
+	// Unit shrinking
+	int remaining = size;
+	dbg_dt("dthreads: shrinking from %d to %d threads\n",
+	       unit->size, size);
+
+	// New threads vector
+	dthread_t **threads = malloc(size * sizeof(dthread_t *));
+	if (threads == 0) {
+		return KNOTD_ENOMEM;
+	}
+
+	// Lock unit
+	pthread_mutex_lock(&unit->_notify_mx);
+	dt_unit_lock(unit);
+
+	// Iterate while there is space in new unit
+	memset(threads, 0, size * sizeof(dthread_t *));
+	int threshold = ThreadActive;
+	for (;;) {
+
+		// Find threads matching given criterias
+		int inspected = 0;
+		for (int i = 0; i < unit->size; ++i) {
+
+			// Get thread
+			dthread_t *thread = unit->threads[i];
+			if (thread == 0) {
+				continue;
+			}
+
+			// Count thread as inspected
+			++inspected;
+
+			lock_thread_rw(thread);
+
+			// Populate with matching threads
+			if ((remaining > 0) &&
+			    (!threshold || (thread->state & threshold))) {
+
+				// Append to new vector
+				threads[size - remaining] = thread;
+				--remaining;
+
+				// Invalidate in old vector
+				unit->threads[i] = 0;
+				dbg_dt_verb("dthreads: [%p] dt_resize: elected\n",
+				            thread);
+
+			} else if (remaining <= 0) {
+
+				// Not enough space, delete thread
+				if (thread->state & ThreadDead) {
+					unlock_thread_rw(thread);
+					--inspected;
+					continue;
+				}
+
+				// Signalize thread to stop
+				thread->state = ThreadDead | ThreadCancelled;
+				dt_signalize(thread, SIGALRM);
+				dbg_dt_verb("dthreads: [%p] dt_resize: "
+				            "is discarded\n", thread);
+			}
+
+			// Unlock thread and continue
+			unlock_thread_rw(thread);
+		}
+
+		// Finished inspecting running threads
+		if (inspected == 0) {
+			break;
+		}
+
+		// Lower threshold
+		switch (threshold) {
+		case ThreadActive:
+			threshold = ThreadIdle;
+			break;
+		case ThreadIdle:
+			threshold = ThreadDead;
+			break;
+		default:
+			threshold = ThreadJoined;
+			break;
+		}
+	}
+
+	// Notify idle threads to wake up
+	pthread_cond_broadcast(&unit->_notify);
+	pthread_mutex_unlock(&unit->_notify_mx);
+
+	// Join discarded threads
+	for (int i = 0; i < unit->size; ++i) {
+
+		// Get thread
+		dthread_t *thread = unit->threads[i];
+		if (thread == 0) {
+			continue;
+		}
+
+		pthread_join(thread->_thr, 0);
+		thread->state = ThreadJoined;
+
+		// Delete thread
+		dt_delete_thread(&thread);
+		unit->threads[i] = 0;
+	}
+
+	// Reassign unit threads vector
+	unit->size = size;
+	free(unit->threads);
+	unit->threads = threads;
+
+	// Unlock unit
+	dt_unit_unlock(unit);
+
+	return 0;
+}
+
+int dt_start(dt_unit_t *unit)
+{
+	// Check input
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Lock unit
+	pthread_mutex_lock(&unit->_notify_mx);
+	dt_unit_lock(unit);
+	for (int i = 0; i < unit->size; ++i) {
+
+		dthread_t *thread = unit->threads[i];
+		int res = dt_start_id(thread);
+		if (res != 0) {
+			dbg_dt("dthreads: failed to create thread '%d'.", i);
+			dt_unit_unlock(unit);
+			pthread_mutex_unlock(&unit->_notify_mx);
+			return res;
+		}
+
+		dbg_dt("dthreads: [%p] %s: thread started\n",
+		         thread, __func__);
+	}
+
+	// Unlock unit
+	dt_unit_unlock(unit);
+	pthread_cond_broadcast(&unit->_notify);
+	pthread_mutex_unlock(&unit->_notify_mx);
+	return 0;
+}
+
+int dt_start_id(dthread_t *thread)
+{
+	// Check input
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	lock_thread_rw(thread);
+
+	// Update state
+	int prev_state = thread->state;
+	thread->state |= ThreadActive;
+	thread->state &= ~ThreadIdle;
+	thread->state &= ~ThreadDead;
+	thread->state &= ~ThreadJoined;
+	thread->state &= ~ThreadJoinable;
+
+	// Do not re-create running threads
+	if (prev_state != ThreadJoined) {
+		dbg_dt("dthreads: [%p] %s: refused to recreate thread\n",
+		         thread, __func__);
+		unlock_thread_rw(thread);
+		return 0;
+	}
+
+	// Start thread
+	int res = pthread_create(&thread->_thr,  /* pthread_t */
+	                         &thread->_attr, /* pthread_attr_t */
+	                         thread_ep,      /* routine: thread_ep */
+	                         thread);        /* passed object: dthread_t */
+
+	// Unlock thread
+	unlock_thread_rw(thread);
+	return res;
+}
+
+int dt_signalize(dthread_t *thread, int signum)
+{
+	// Check input
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	int ret = pthread_kill(thread->_thr, signum);
+
+	/* Not thread id found or invalid signum. */
+	if (ret == EINVAL || ret == ESRCH) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Generic error. */
+	if (ret < 0) {
+		return KNOTD_ERROR;
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_join(dt_unit_t *unit)
+{
+	// Check input
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	for (;;) {
+
+		// Lock unit
+		pthread_mutex_lock(&unit->_report_mx);
+		dt_unit_lock(unit);
+
+		// Browse threads
+		int active_threads = 0;
+		for (int i = 0; i < unit->size; ++i) {
+
+			// Count active or cancelled but pending threads
+			dthread_t *thread = unit->threads[i];
+			lock_thread_rw(thread);
+			if (thread->state & (ThreadActive|ThreadCancelled)) {
+				++active_threads;
+			}
+
+			// Reclaim dead threads, but only fast
+			if (thread->state & ThreadJoinable) {
+				unlock_thread_rw(thread);
+				dbg_dt_verb("dthreads: [%p] %s: reclaiming\n",
+				         thread, __func__);
+				pthread_join(thread->_thr, 0);
+				dbg_dt("dthreads: [%p] %s: reclaimed\n",
+				         thread, __func__);
+				thread->state = ThreadJoined;
+			} else {
+				unlock_thread_rw(thread);
+			}
+		}
+
+		// Unlock unit
+		dt_unit_unlock(unit);
+
+		// Check result
+		if (active_threads == 0) {
+			pthread_mutex_unlock(&unit->_report_mx);
+			break;
+		}
+
+		// Wait for a thread to finish
+		pthread_cond_wait(&unit->_report, &unit->_report_mx);
+		pthread_mutex_unlock(&unit->_report_mx);
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_stop_id(dthread_t *thread)
+{
+	// Check input
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Signalize active thread to stop
+	lock_thread_rw(thread);
+	if (thread->state & (ThreadIdle | ThreadActive)) {
+		thread->state = ThreadDead | ThreadCancelled;
+		dt_signalize(thread, SIGALRM);
+	}
+	unlock_thread_rw(thread);
+
+	// Broadcast notification
+	dt_unit_t *unit = thread->unit;
+	if (unit != 0) {
+		pthread_mutex_lock(&unit->_notify_mx);
+		pthread_cond_broadcast(&unit->_notify);
+		pthread_mutex_unlock(&unit->_notify_mx);
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_stop(dt_unit_t *unit)
+{
+	// Check unit
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Lock unit
+	pthread_mutex_lock(&unit->_notify_mx);
+	dt_unit_lock(unit);
+
+	// Signalize all threads to stop
+	for (int i = 0; i < unit->size; ++i) {
+
+		// Lock thread
+		dthread_t *thread = unit->threads[i];
+		lock_thread_rw(thread);
+		if (thread->state & (ThreadIdle | ThreadActive)) {
+			thread->state = ThreadDead | ThreadCancelled;
+			dbg_dt("dthreads: [%p] %s: stopping thread\n",
+			         thread, __func__);
+			dt_signalize(thread, SIGALRM);
+		}
+		unlock_thread_rw(thread);
+	}
+
+	// Unlock unit
+	dt_unit_unlock(unit);
+
+	// Broadcast notification
+	pthread_cond_broadcast(&unit->_notify);
+	pthread_mutex_unlock(&unit->_notify_mx);
+
+	return KNOTD_EOK;
+}
+
+int dt_setprio(dthread_t *thread, int prio)
+{
+	// Check input
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Clamp priority
+	int policy = SCHED_FIFO;
+	prio = MIN(MAX(sched_get_priority_min(policy), prio),
+		   sched_get_priority_max(policy));
+
+	// Update scheduler policy
+	int ret = pthread_attr_setschedpolicy(&thread->_attr, policy);
+
+	// Update priority
+	if (ret >= 0) {
+		struct sched_param sp;
+		sp.sched_priority = prio;
+		ret = pthread_attr_setschedparam(&thread->_attr, &sp);
+	}
+
+	/* Map error codes. */
+	if (ret < 0) {
+		dbg_dt("dthreads: [%p] %s(%d): failed",
+		       thread, __func__, prio);
+
+		/* Map "not supported". */
+		if (ret == ENOTSUP) {
+			return KNOTD_ENOTSUP;
+		}
+
+		return KNOTD_EINVAL;
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_repurpose(dthread_t *thread, runnable_t runnable, void *data)
+{
+	// Check
+	if (thread == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Stop here if thread isn't a member of a unit
+	dt_unit_t *unit = thread->unit;
+	if (unit == 0) {
+		lock_thread_rw(thread);
+		thread->state = ThreadActive | ThreadCancelled;
+		unlock_thread_rw(thread);
+		return KNOTD_ENOTSUP;
+	}
+
+	// Lock thread state changes
+	pthread_mutex_lock(&unit->_notify_mx);
+	lock_thread_rw(thread);
+
+	// Repurpose it's object and runnable
+	thread->run = runnable;
+	thread->_adata = data;
+
+	// Cancel current runnable if running
+	if (thread->state & (ThreadIdle | ThreadActive)) {
+
+		// Update state
+		thread->state = ThreadActive | ThreadCancelled;
+		unlock_thread_rw(thread);
+
+		// Notify thread
+		pthread_cond_broadcast(&unit->_notify);
+		pthread_mutex_unlock(&unit->_notify_mx);
+	} else {
+		unlock_thread_rw(thread);
+		pthread_mutex_unlock(&unit->_notify_mx);
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_activate(dthread_t *thread)
+{
+	return dt_update_thread(thread, ThreadActive);
+}
+
+int dt_cancel(dthread_t *thread)
+{
+	return dt_update_thread(thread, ThreadIdle | ThreadCancelled);
+}
+
+int dt_compact(dt_unit_t *unit)
+{
+	// Check input
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	// Lock unit
+	pthread_mutex_lock(&unit->_notify_mx);
+	dt_unit_lock(unit);
+
+	// Reclaim all Idle threads
+	for (int i = 0; i < unit->size; ++i) {
+
+		// Locked state update
+		dthread_t *thread = unit->threads[i];
+		lock_thread_rw(thread);
+		if (thread->state & (ThreadIdle)) {
+			thread->state = ThreadDead | ThreadCancelled;
+			dt_signalize(thread, SIGALRM);
+		}
+		unlock_thread_rw(thread);
+	}
+
+	// Notify all threads
+	pthread_cond_broadcast(&unit->_notify);
+	pthread_mutex_unlock(&unit->_notify_mx);
+
+	// Join all threads
+	for (int i = 0; i < unit->size; ++i) {
+
+		// Reclaim all dead threads
+		dthread_t *thread = unit->threads[i];
+		lock_thread_rw(thread);
+		if (thread->state & (ThreadDead)) {
+			dbg_dt_verb("dthreads: [%p] %s: reclaiming thread\n",
+			            thread, __func__);
+			unlock_thread_rw(thread);
+			pthread_join(thread->_thr, 0);
+			dbg_dt("dthreads: [%p] %s: thread reclaimed\n",
+			       thread, __func__);
+			thread->state = ThreadJoined;
+		} else {
+			unlock_thread_rw(thread);
+		}
+	}
+
+	dbg_dt_verb("dthreads: compact: joined all threads\n");
+
+	// Unlock unit
+	dt_unit_unlock(unit);
+
+	return KNOTD_EOK;
+}
+
+int dt_optimal_size()
+{
+#ifdef _SC_NPROCESSORS_ONLN
+	int ret = (int) sysconf(_SC_NPROCESSORS_ONLN);
+	if (ret >= 1) {
+		return ret + CPU_ESTIMATE_MAGIC;
+	}
+#endif
+	dbg_dt("dthreads: failed to fetch the number of online CPUs.");
+	return DEFAULT_THR_COUNT;
+}
+
+/*!
+ * \todo Use memory barriers or asynchronous read-only access, locking
+ *       poses a thread performance decrease by 1.31%.
+ */
+
+int dt_is_cancelled(dthread_t *thread)
+{
+	// Check input
+	if (thread == 0) {
+		return 0;
+	}
+
+	lock_thread_rw(thread);
+	int ret = thread->state & ThreadCancelled;
+	unlock_thread_rw(thread);
+	return ret;
+}
+
+int dt_unit_lock(dt_unit_t *unit)
+{
+	// Check input
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	int ret = pthread_mutex_lock(&unit->_mx);
+
+	/* Map errors. */
+	if (ret < 0) {
+		return knot_map_errno(EINVAL, EAGAIN);
+	}
+
+	return KNOTD_EOK;
+}
+
+int dt_unit_unlock(dt_unit_t *unit)
+{
+	// Check input
+	if (unit == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	int ret = pthread_mutex_unlock(&unit->_mx);
+
+	/* Map errors. */
+	if (ret < 0) {
+		return knot_map_errno(EINVAL, EAGAIN);
+	}
+
+	return KNOTD_EOK;
+}
diff --git a/src/knot/server/dthreads.h b/src/knot/server/dthreads.h
new file mode 100644
index 0000000..8a5e2b4
--- /dev/null
+++ b/src/knot/server/dthreads.h
@@ -0,0 +1,353 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file dthreads.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief Threading API.
+ *
+ * Dynamic threads provide:
+ * - coherent and incoherent threading capabilities
+ * - thread repurposing
+ * - thread prioritization
+ * - on-the-fly changing of threading unit size
+ *
+ * Coherent threading unit is when all threads execute
+ * the same runnable function.
+ *
+ * Incoherent function is when at least one thread executes
+ * a different runnable than the others.
+ *
+ * \addtogroup threading
+ * @{
+ */
+
+#ifndef _KNOTD_DTHREADS_H_
+#define _KNOTD_DTHREADS_H_
+
+#include <pthread.h>
+
+/* Forward decls */
+struct dthread_t;
+struct dt_unit_t;
+
+/*!
+ * \brief Thread state enumeration.
+ */
+typedef enum {
+	ThreadJoined    = 1 << 0, /*!< Thread is finished and joined. */
+	ThreadJoinable  = 1 << 1, /*!< Thread is waiting to be reclaimed. */
+	ThreadCancelled = 1 << 2, /*!< Thread is cancelled, finishing task. */
+	ThreadDead      = 1 << 3, /*!< Thread is finished, exiting. */
+	ThreadIdle      = 1 << 4, /*!< Thread is idle, waiting for purpose. */
+	ThreadActive    = 1 << 5  /*!< Thread is active, working on a task. */
+
+} dt_state_t;
+
+/*!
+ * \brief Thread runnable prototype.
+ *
+ * Runnable is basically a pointer to function which is called on active
+ * thread runtime.
+ *
+ * \note When implementing a runnable, keep in mind to check thread state as
+ *       it may change, and implement a cooperative cancellation point.
+ *
+ *       Implement this by checking dt_is_cancelled() and return
+ *       as soon as possible.
+ */
+typedef int (*runnable_t)(struct dthread_t *);
+
+/*!
+ * \brief Single thread descriptor public API.
+ */
+typedef struct dthread_t {
+	volatile unsigned  state; /*!< Bitfield of dt_flag flags. */
+	runnable_t           run; /*!< Runnable function or 0. */
+	void               *data; /*!< Currently active data */
+	struct dt_unit_t   *unit; /*!< Reference to assigned unit. */
+	void             *_adata; /* Thread-specific data. */
+	pthread_t           _thr; /* Thread */
+	pthread_attr_t     _attr; /* Thread attributes */
+	pthread_mutex_t      _mx; /* Thread state change lock. */
+} dthread_t;
+
+/*!
+ * \brief Thread unit descriptor API.
+ *
+ * Thread unit consists of 1..N threads.
+ * Unit is coherent if all threads execute
+ * the same runnable.
+ */
+typedef struct dt_unit_t {
+	int                   size; /*!< Unit width (number of threads) */
+	struct dthread_t **threads; /*!< Array of threads */
+	pthread_cond_t     _notify; /* Notify thread */
+	pthread_mutex_t _notify_mx; /* Condition mutex */
+	pthread_cond_t     _report; /* Report thread state */
+	pthread_mutex_t _report_mx; /* Condition mutex */
+	pthread_mutex_t        _mx; /* Unit lock */
+} dt_unit_t;
+
+/*!
+ * \brief Create a set of threads with no initial runnable.
+ *
+ * \note All threads are created with Dead state.
+ *       This means, they're not physically created unit dt_start() is called.
+ *
+ * \param count Requested thread count.
+ *
+ * \retval New instance if successful
+ * \retval NULL on error
+ */
+dt_unit_t *dt_create(int count);
+
+/*!
+ * \brief Create a set of coherent threads.
+ *
+ * Coherent means, that the threads will share a common runnable and the data.
+ *
+ * \param count Requested thread count.
+ * \param runnable Runnable function for all threads.
+ * \param data Any data passed onto threads.
+ *
+ * \retval New instance if successful
+ * \retval NULL on error
+ */
+dt_unit_t *dt_create_coherent(int count, runnable_t runnable, void *data);
+
+/*!
+ * \brief Free unit.
+ *
+ * \warning Behavior is undefined if threads are still active, make sure
+ *          to call dt_join() first.
+ *
+ * \param unit Unit to be deleted.
+ */
+void dt_delete(dt_unit_t **unit);
+
+/*!
+ * \brief Resize unit to given number.
+ *
+ * \note Newly created dthreads will have no runnable or data, their state
+ *       will be ThreadJoined (that means no thread will be physically created
+ *       until the next dt_start()).
+ *
+ * \warning Be careful when shrinking unit, joined and idle threads are
+ *          reclaimed first, but it may kill your active threads
+ *          as a last resort.
+ *          Threads will stop at their nearest cancellation point,
+ *          so this is potentially an expensive and blocking operation.
+ *
+ * \param unit Unit to be resized.
+ * \param size New unit size.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOMEM out of memory error.
+ */
+int dt_resize(dt_unit_t *unit, int size);
+
+/*!
+ * \brief Start all threads in selected unit.
+ *
+ * \param unit Unit to be started.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters (unit is null).
+ */
+int dt_start(dt_unit_t *unit);
+
+/*!
+ * \brief Start given thread.
+ *
+ * \param thread Target thread instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_start_id(dthread_t *thread);
+
+/*!
+ * \brief Send given signal to thread.
+ *
+ * \note This is useful to interrupt some blocking I/O as well, for example
+ *       with SIGALRM, which is handled by default.
+ * \note Signal handler may be overriden in runnable.
+ *
+ * \param thread Target thread instance.
+ * \param signum Signal code.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int dt_signalize(dthread_t *thread, int signum);
+
+/*!
+ * \brief Wait for all thread in unit to finish.
+ *
+ * \param unit Unit to be joined.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_join(dt_unit_t *unit);
+
+/*!
+ * \brief Stop thread from running.
+ *
+ * Active thread is interrupted at the nearest runnable cancellation point.
+ *
+ * \param thread Target thread instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_stop_id(dthread_t *thread);
+
+/*!
+ * \brief Stop all threads in unit.
+ *
+ * Thread is interrupted at the nearest runnable cancellation point.
+ *
+ * \param unit Unit to be stopped.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_stop(dt_unit_t *unit);
+
+/*!
+ * \brief Modify thread priority.
+ *
+ * \param thread Target thread instance.
+ * \param prio Requested priority (positive integer, default is 0).
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_setprio(dthread_t *thread, int prio);
+
+/*!
+ * \brief Set thread to execute another runnable.
+ *
+ * \param thread Target thread instance.
+ * \param runnable  Runnable function for target thread.
+ * \param data      Data passed to target thread.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOTSUP operation not supported.
+ */
+int dt_repurpose(dthread_t *thread, runnable_t runnable, void *data);
+
+/*!
+ * \brief Wake up thread from idle state.
+ *
+ * Thread is awoken from idle state and reenters runnable.
+ * This function only affects idle threads.
+ *
+ * \note Unit needs to be started with dt_start() first, as the function
+ *       doesn't affect dead threads.
+ *
+ * \param thread Target thread instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOTSUP operation not supported.
+ */
+int dt_activate(dthread_t *thread);
+
+/*!
+ * \brief Put thread to idle state, cancells current runnable function.
+ *
+ * Thread is flagged with Cancel flag and returns from runnable at the nearest
+ * cancellation point, which requires complying runnable function.
+ *
+ * \note Thread isn't disposed, but put to idle state until it's requested
+ *       again or collected by dt_compact().
+ *
+ * \param thread Target thread instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_cancel(dthread_t *thread);
+
+/*!
+ * \brief Collect and dispose idle threads.
+ *
+ * \param unit Target unit instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int dt_compact(dt_unit_t *unit);
+
+/*!
+ * \brief Return optimal number of threads for instance.
+ *
+ * It is estimated as NUM_CPUs + 1.
+ * Fallback is DEFAULT_THR_COUNT  (\see common.h).
+ *
+ * \return Number of threads.
+ */
+int dt_optimal_size();
+
+/*!
+ * \brief Return true if thread is cancelled.
+ *
+ * Synchronously check for ThreadCancelled flag.
+ *
+ * \param thread Target thread instance.
+ *
+ * \retval 1 if cancelled.
+ * \retval 0 if not cancelled.
+ */
+int dt_is_cancelled(dthread_t *thread);
+
+/*!
+ * \brief Lock unit to prevent parallel operations which could alter unit
+ *        at the same time.
+ *
+ * \param unit Target unit instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_EAGAIN lack of resources to lock unit, try again.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int dt_unit_lock(dt_unit_t *unit);
+
+/*!
+ * \brief Unlock unit.
+ *
+ * \see dt_unit_lock()
+ *
+ * \param unit Target unit instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_EAGAIN lack of resources to unlock unit, try again.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int dt_unit_unlock(dt_unit_t *unit);
+
+#endif // _KNOTD_DTHREADS_H_
+
+/*! @} */
diff --git a/src/knot/server/journal.c b/src/knot/server/journal.c
new file mode 100644
index 0000000..651f0f3
--- /dev/null
+++ b/src/knot/server/journal.c
@@ -0,0 +1,636 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "knot/other/error.h"
+#include "knot/other/debug.h"
+#include "journal.h"
+
+/*! \brief Infinite file size limit. */
+#define FSLIMIT_INF (~((size_t)0))
+
+/*! \brief Node classification macros. */
+#define jnode_flags(j, i) ((j)->nodes[(i)].flags)
+
+/*! \brief Next node. */
+#define jnode_next(j, i) (((i) + 1) % (j)->max_nodes)
+
+/*! \brief Previous node. */
+#define jnode_prev(j, i) (((i) == 0) ? (j)->max_nodes - 1 : (i) - 1)
+
+static inline int sfread(void *dst, size_t len, int fd)
+{
+	return read(fd, dst, len) == len;
+}
+
+static inline int sfwrite(const void *src, size_t len, int fd)
+{
+	return write(fd, src, len) == len;
+}
+
+/*! \brief Equality compare function. */
+static inline int journal_cmp_eq(uint64_t k1, uint64_t k2)
+{
+	if (k1 == k2) {
+		return 0;
+	}
+	
+	if (k1 < k2) {
+		return -1;
+	}
+	
+	return 1;
+}
+
+/*! \brief Recover metadata from journal. */
+static int journal_recover(journal_t *j)
+{
+	/* Attempt to recover queue. */
+	int qstate[2] = { -1, -1 };
+	unsigned c = 0, p = j->max_nodes - 1;
+	while (1) {
+		
+		/* Fetch previous and current node. */
+		journal_node_t *np = j->nodes + p;
+		journal_node_t *nc = j->nodes + c;
+
+		/* Check flags
+		 * p c (0 = free, 1 = non-free)
+		 * 0 0 - in free segment
+		 * 0 1 - c-node is qhead
+		 * 1 0 - c-node is qtail
+		 * 1 1 - in full segment
+		 */
+		unsigned c_set = (nc->flags > JOURNAL_FREE);
+		unsigned p_set = (np->flags > JOURNAL_FREE);
+		if (!p_set && c_set && qstate[0] < 0) {
+			qstate[0] = c; /* Recovered qhead. */
+			dbg_journal_verb("journal: recovered qhead=%u\n",
+			                 qstate[0]);
+		}
+		if (p_set && !c_set && qstate[1] < 0) {\
+			qstate[1] = c; /* Recovered qtail. */
+			dbg_journal_verb("journal: recovered qtail=%u\n",
+			                 qstate[1]);
+		}
+		
+		/* Both qstates set. */
+		if (qstate[0] > -1 && qstate[1] > -1) {
+			break;
+		}
+
+		/* Set prev and next. */
+		p = c;
+		c = (c + 1) % j->max_nodes;
+		
+		/* All nodes probed. */
+		if (c == 0) {
+			dbg_journal("journal: failed to recover node queue\n");
+			break;
+		}
+	}
+	
+	/* Evaluate */
+	if (qstate[0] < 0 || qstate[1] < 0) {
+		return KNOTD_ERANGE;
+	}
+	
+	/* Write back. */
+	lseek(j->fd, JOURNAL_HSIZE - 2 * sizeof(uint16_t), SEEK_SET);
+	if (!sfwrite(qstate, 2 * sizeof(uint16_t), j->fd)) {
+		dbg_journal("journal: failed to write back queue state\n");
+		return KNOTD_ERROR;
+	}
+	
+	/* Reset queue state. */
+	j->qhead = qstate[0];
+	j->qtail = qstate[1];
+	dbg_journal("journal: node queue=<%u,%u> recovered\n",
+	            qstate[0], qstate[1]);
+	
+	
+	return KNOTD_EOK;
+}
+
+int journal_create(const char *fn, uint16_t max_nodes)
+{
+	/* File lock. */
+	struct flock fl;
+	memset(&fl, 0, sizeof(struct flock));
+	fl.l_type = F_WRLCK;
+	fl.l_whence = SEEK_SET;
+	fl.l_start = 0;
+	fl.l_len = 0;
+	fl.l_pid = getpid();
+	
+	/* Create journal file. */
+	int fd = open(fn, O_RDWR|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG);
+	if (fd < 0) {
+		dbg_journal("journal: failed to create file '%s'\n", fn);
+		return KNOTD_EINVAL;
+	}
+	
+	/* Lock. */
+	fcntl(fd, F_SETLKW, &fl);
+	fl.l_type  = F_UNLCK;
+
+	/* Create journal header. */
+	dbg_journal("journal: creating header\n");
+	if (!sfwrite(&max_nodes, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		remove(fn);
+		return KNOTD_ERROR;
+	}
+
+	/* Create node queue head + tail.
+	 * qhead points to least recent node
+	 * qtail points to next free node
+	 * qhead == qtail means empty queue
+	 */
+	uint16_t zval = 0;
+	if (!sfwrite(&zval, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		remove(fn);
+		return KNOTD_ERROR;
+	}
+	
+	if (!sfwrite(&zval, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		remove(fn);
+		return KNOTD_ERROR;
+	}
+
+	dbg_journal_verb("journal: creating free segment descriptor\n");
+
+	/* Create free segment descriptor. */
+	journal_node_t jn;
+	memset(&jn, 0, sizeof(journal_node_t));
+	jn.id = 0;
+	jn.flags = JOURNAL_VALID;
+	jn.pos = JOURNAL_HSIZE + (max_nodes + 1) * sizeof(journal_node_t);
+	jn.len = 0;
+	if (!sfwrite(&jn, sizeof(journal_node_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		remove(fn);
+		return KNOTD_ERROR;
+	}
+
+	/* Create nodes. */
+	dbg_journal("journal: creating node table, size=%u\n", max_nodes);
+	memset(&jn, 0, sizeof(journal_node_t));
+	for(uint16_t i = 0; i < max_nodes; ++i) {
+		if (!sfwrite(&jn, sizeof(journal_node_t), fd)) {
+			fcntl(fd, F_SETLK, &fl);
+			close(fd);
+			remove(fn);
+			return KNOTD_ERROR;
+		}
+	}
+	
+	/* Unlock and close. */
+	fcntl(fd, F_SETLK, &fl);
+	close(fd);
+
+	/* Journal file created. */
+	dbg_journal("journal: file '%s' initialized\n", fn);
+	return KNOTD_EOK;
+}
+
+journal_t* journal_open(const char *fn, size_t fslimit, uint16_t bflags)
+{
+	/*! \todo Memory mapping may be faster than stdio? */
+
+	/* File lock. */
+	struct flock fl;
+	memset(&fl, 0, sizeof(struct flock));
+	fl.l_type = F_WRLCK;
+	fl.l_whence = SEEK_SET;
+	fl.l_start = 0;
+	fl.l_len = 0;
+	fl.l_pid = getpid();
+
+	/* Check file. */
+	struct stat st;
+	if (stat(fn, &st) < 0) {
+		return 0;
+	}
+
+	/* Open journal file for r/w. */
+	int fd = open(fn, O_RDWR);
+	if (fd < 0) {
+		dbg_journal("journal: failed to open file '%s'\n", fn);
+		return 0;
+	}
+	
+	/* Attempt to lock. */
+	dbg_journal_verb("journal: locking journal %s\n", fn);
+	int ret = fcntl(fd, F_SETLK, &fl);
+	
+	/* Lock. */
+	if (ret < 0) {
+		struct flock efl;
+		memcpy(&efl, &fl, sizeof(struct flock));
+		fcntl(fd, F_GETLK, &efl);
+		log_server_warning("Journal file '%s' is locked by process "
+		                   "PID=%d, waiting for process to "
+		                   "release lock.\n",
+		                   fn, efl.l_pid);
+		ret = fcntl(fd, F_SETLKW, &fl);
+	}
+	fl.l_type  = F_UNLCK;
+	dbg_journal("journal: locked journal %s (returned %d)\n", fn, ret);
+
+	/* Read maximum number of entries. */
+	uint16_t max_nodes = 512;
+	if (!sfread(&max_nodes, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		return 0;
+	}
+
+	/* Allocate journal structure. */
+	const size_t node_len = sizeof(journal_node_t);
+	journal_t *j = malloc(sizeof(journal_t) + max_nodes * node_len);
+	if (!j) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		return 0;
+	}
+	j->qhead = j->qtail = 0;
+	j->fd = fd;
+	j->max_nodes = max_nodes;
+	j->bflags = bflags;
+
+	/* Load node queue state. */
+	if (!sfread(&j->qhead, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		free(j);
+		return 0;
+	}
+
+	/* Load queue tail. */
+	if (!sfread(&j->qtail, sizeof(uint16_t), fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		free(j);
+		return 0;
+	}
+
+	/* Load empty segment descriptor. */
+	if (!sfread(&j->free, node_len, fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		free(j);
+		return 0;
+	}
+
+	/* Read journal descriptors table. */
+	if (!sfread(&j->nodes, max_nodes * node_len, fd)) {
+		fcntl(fd, F_SETLK, &fl);
+		close(fd);
+		free(j);
+		return 0;
+	}
+
+	/* Set file size. */
+	j->fsize = st.st_size;
+	if (fslimit == 0) {
+		j->fslimit = FSLIMIT_INF;
+	} else {
+		j->fslimit = (size_t)fslimit;
+	}
+	
+	dbg_journal("journal: opened journal size=%u, queue=<%u, %u>, fd=%d\n",
+	            max_nodes, j->qhead, j->qtail, j->fd);	
+	
+	/* Check node queue. */
+	unsigned qtail_free = (jnode_flags(j, j->qtail) <= JOURNAL_FREE);
+	unsigned qhead_free = j->max_nodes - 1; /* Left of qhead must be free.*/
+	if (j->qhead > 0) { 
+		qhead_free = (j->qhead - 1);
+	}
+	qhead_free = (jnode_flags(j, qhead_free) <= JOURNAL_FREE);
+	if ((j->qhead != j->qtail) && (!qtail_free || !qhead_free)) {
+		log_server_warning("Recovering journal '%s' metadata "
+		                   "after crash.\n",
+		                   fn);
+		ret = journal_recover(j);
+		if (ret != KNOTD_EOK) {
+			log_server_error("Journal file '%s' is unrecoverable, "
+			                 "metadata corrupted - %s\n",
+			                 fn, knotd_strerror(ret));
+			fcntl(fd, F_SETLK, &fl);
+			close(fd);
+			free(j);
+			return 0;
+		}
+	}
+
+	/* Save file lock. */
+	fl.l_type = F_WRLCK;
+	memcpy(&j->fl, &fl, sizeof(struct flock));
+
+	return j;
+}
+
+int journal_fetch(journal_t *journal, uint64_t id,
+		  journal_cmp_t cf, journal_node_t** dst)
+{
+	if (journal == 0 || dst == 0) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Check compare function. */
+	if (!cf) {
+		cf = journal_cmp_eq;
+	}
+
+	/*! \todo Organize journal descriptors in btree? */
+	size_t i = jnode_prev(journal, journal->qtail);
+	size_t endp = jnode_prev(journal, journal->qhead);
+	for(; i != endp; i = jnode_prev(journal, i)) {
+		if (cf(journal->nodes[i].id, id) == 0) {
+			*dst = journal->nodes + i;
+			return KNOTD_EOK;
+		}
+	}
+
+	return KNOTD_ENOENT;
+}
+
+int journal_read(journal_t *journal, uint64_t id, journal_cmp_t cf, char *dst)
+{
+	if (journal == 0 || dst == 0) {
+		return KNOTD_EINVAL;
+	}
+	
+	journal_node_t *n = 0;
+	if(journal_fetch(journal, id, cf, &n) != 0) {
+		dbg_journal("journal: failed to fetch node with id=%llu\n",
+		            (unsigned long long)id);
+		return KNOTD_ENOENT;
+	}
+
+	/* Check valid flag. */
+	if (!(n->flags & JOURNAL_VALID)) {
+		dbg_journal("journal: node with id=%llu is invalid "
+		            "(flags=0x%hx)\n", (unsigned long long)id, n->flags);
+		return KNOTD_EINVAL;
+	}
+
+	dbg_journal("journal: reading node with id=%llu, data=<%u, %u>, flags=0x%hx\n",
+	            (unsigned long long)id, n->pos, n->pos + n->len, n->flags);
+
+	/* Seek journal node. */
+	lseek(journal->fd, n->pos, SEEK_SET);
+
+	/* Read journal node content. */
+	if (!sfread(dst, n->len, journal->fd)) {
+		return KNOTD_ERROR;
+	}
+
+	return KNOTD_EOK;
+}
+
+int journal_write(journal_t *journal, uint64_t id, const char *src, size_t size)
+{
+	if (journal == 0 || src == 0) {
+		return KNOTD_EINVAL;
+	}
+	
+	const size_t node_len = sizeof(journal_node_t);
+
+	/* Find next free node. */
+	uint16_t jnext = (journal->qtail + 1) % journal->max_nodes;
+
+	dbg_journal("journal: will write id=%llu, node=%u, size=%zu, fsize=%zu\n",
+	            (unsigned long long)id, journal->qtail, size, journal->fsize);
+
+	/* Calculate remaining bytes to reach file size limit. */
+	size_t fs_remaining = journal->fslimit - journal->fsize;
+
+	/* Increase free segment if on the end of file. */
+	journal_node_t *n = journal->nodes + journal->qtail;
+	if (journal->free.pos + journal->free.len == journal->fsize) {
+
+		dbg_journal_verb("journal: * is last node\n");
+
+		/* Grow journal file until the size limit. */
+		if(journal->free.len < size && size <= fs_remaining) {
+			size_t diff = size - journal->free.len;
+			dbg_journal("journal: * growing by +%zu, pos=%u, "
+			            "new fsize=%zu\n",
+			            diff, journal->free.pos,
+			            journal->fsize + diff);
+			journal->fsize += diff; /* Appending increases file size. */
+			journal->free.len += diff;
+
+		}
+
+		/*  Rewind if resize is needed, but the limit is reached. */
+		if(journal->free.len < size && size > fs_remaining) {
+			journal_node_t *head = journal->nodes + journal->qhead;
+			journal->fsize = journal->free.pos;
+			journal->free.pos = head->pos;
+			journal->free.len = 0;
+			dbg_journal_verb("journal: * fslimit reached, "
+			                 "rewinding to %u\n",
+			                 head->pos);
+			dbg_journal_verb("journal: * file size trimmed to %zu\n",
+			                 journal->fsize);
+		}
+	}
+	
+	/* Evict occupied nodes if necessary. */
+	while (journal->free.len < size ||
+	       journal->nodes[jnext].flags > JOURNAL_FREE) {
+
+		/* Evict least recent node if not empty. */
+		journal_node_t *head = journal->nodes + journal->qhead;
+
+		/* Check if it has been synced to disk. */
+		if (head->flags & JOURNAL_DIRTY) {
+			return KNOTD_EAGAIN;
+		}
+
+		/* Write back evicted node. */
+		head->flags = JOURNAL_FREE;
+		lseek(journal->fd, JOURNAL_HSIZE + (journal->qhead + 1) * node_len, SEEK_SET);
+		if (!sfwrite(head, node_len, journal->fd)) {
+			return KNOTD_ERROR;
+		}
+
+		dbg_journal("journal: * evicted node=%u, growing by +%u\n",
+			      journal->qhead, head->len);
+
+		/* Write back query state. */
+		journal->qhead = (journal->qhead + 1) % journal->max_nodes;
+		uint16_t qstate[2] = {journal->qhead, journal->qtail};
+		lseek(journal->fd, JOURNAL_HSIZE - 2 * sizeof(uint16_t), SEEK_SET);
+		if (!sfwrite(qstate, 2 * sizeof(uint16_t), journal->fd)) {
+			return KNOTD_ERROR;
+		}
+
+		/* Increase free segment. */
+		journal->free.len += head->len;
+	}
+
+	/* Invalidate node and write back. */
+	n->id = id;
+	n->pos = journal->free.pos;
+	n->len = size;
+	n->flags = JOURNAL_FREE;
+	journal_update(journal, n);
+
+	/* Write data to permanent storage. */
+	lseek(journal->fd, n->pos, SEEK_SET);
+	if (!sfwrite(src, size, journal->fd)) {
+		return KNOTD_ERROR;
+	}
+
+	/* Mark node as valid and write back. */
+	n->flags = JOURNAL_VALID | journal->bflags;
+	journal_update(journal, n);
+
+	/* Handle free segment on node rotation. */
+	if (journal->qtail > jnext && journal->fslimit == FSLIMIT_INF) {
+		/* Trim free space. */
+		journal->fsize -= journal->free.len;
+		dbg_journal_verb("journal: * trimmed filesize to %zu\n",
+		                 journal->fsize);
+
+		/* Rewind free segment. */
+		journal_node_t *n = journal->nodes + jnext;
+		journal->free.pos = n->pos;
+		journal->free.len = 0;
+
+	} else {
+		/* Mark used space. */
+		journal->free.pos += size;
+		journal->free.len -= size;
+	}
+	dbg_journal("journal: finished node=%u, data=<%u, %u> free=<%u, %u>\n",
+	            journal->qtail, n->pos, n->pos + n->len,
+	            journal->free.pos,
+	            journal->free.pos + journal->free.len);
+
+	/* Write back free segment state. */
+	lseek(journal->fd, JOURNAL_HSIZE, SEEK_SET);
+	if (!sfwrite(&journal->free, node_len, journal->fd)) {
+		/* Node is marked valid and failed to shrink free space,
+		 * node will be overwritten on the next write. Return error.
+		 */
+		dbg_journal("journal: failed to write back "
+		            "free segment descriptor\n");
+		return KNOTD_ERROR;
+	}
+	
+	/* Node write successful. */
+	journal->qtail = jnext;
+
+	/* Write back queue state, not essential as it may be recovered.
+	 * qhead - lowest valid node identifier (least recent)
+	 * qtail - highest valid node identifier (most recently used)
+	 */
+	uint16_t qstate[2] = {journal->qhead, journal->qtail};
+	lseek(journal->fd, JOURNAL_HSIZE - 2 * sizeof(uint16_t), SEEK_SET);
+	if (!sfwrite(qstate, 2 * sizeof(uint16_t), journal->fd)) {
+		dbg_journal("journal: failed to write back queue state\n");
+		return KNOTD_ERROR;
+	}
+
+	/*! \todo Delayed write-back? */
+	dbg_journal_verb("journal: write of finished, nqueue=<%u, %u>\n",
+	                 journal->qhead, journal->qtail);
+
+	return KNOTD_EOK;
+}
+
+int journal_walk(journal_t *journal, journal_apply_t apply)
+{
+	int ret = KNOTD_EOK;
+	size_t i = journal->qhead;
+	for(; i != journal->qtail; i = (i + 1) % journal->max_nodes) {
+		/* Apply function. */
+		ret = apply(journal, journal->nodes + i);
+	}
+
+	return ret;
+}
+
+int journal_update(journal_t *journal, journal_node_t *n)
+{
+	if (!journal || !n) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Calculate node offset. */
+	const size_t node_len = sizeof(journal_node_t);
+	size_t i = n - journal->nodes;
+	if (i > journal->max_nodes) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Calculate node position in permanent storage. */
+	long jn_fpos = JOURNAL_HSIZE + (i + 1) * node_len;
+
+	dbg_journal("journal: syncing journal node=%zu at %ld\n",
+		      i, jn_fpos);
+
+	/* Write back. */
+	lseek(journal->fd, jn_fpos, SEEK_SET);
+	if (!sfwrite(n, node_len, journal->fd)) {
+		dbg_journal("journal: failed to writeback node=%llu to %ld\n",
+		            (unsigned long long)n->id, jn_fpos);
+		return KNOTD_ERROR;
+	}
+
+	return KNOTD_EOK;
+}
+
+int journal_close(journal_t *journal)
+{
+	/* Check journal. */
+	if (!journal) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Unlock journal file. */
+	journal->fl.l_type = F_UNLCK;
+	fcntl(journal->fd, F_SETLK, &journal->fl);
+	dbg_journal("journal: unlocked journal %p\n", journal);
+
+	/* Close file. */
+	close(journal->fd);
+
+	dbg_journal("journal: closed journal %p\n", journal);
+
+	/* Free allocated resources. */
+	free(journal);
+
+	return KNOTD_EOK;
+}
diff --git a/src/knot/server/journal.h b/src/knot/server/journal.h
new file mode 100644
index 0000000..321b591
--- /dev/null
+++ b/src/knot/server/journal.h
@@ -0,0 +1,243 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file journal.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Journal for storing transactions on permanent storage.
+ *
+ * Journal stores entries on a permanent storage.
+ * Each written entry is guaranteed to persist until
+ * the maximum file size or node count is reached.
+ * Entries are removed from the least recent.
+ *
+ * Journal file structure
+ * <pre>
+ *  uint16_t node_count
+ *  uint16_t node_queue_head
+ *  uint16_t node_queue_tail
+ *  journal_entry_t free_segment
+ *  node_count *journal_entry_t
+ *  ...data...
+ * </pre>
+ * \addtogroup utils
+ * @{
+ */
+
+#ifndef _KNOTD_JOURNAL_H_
+#define _KNOTD_JOURNAL_H_
+
+#include <stdint.h>
+#include <fcntl.h>
+
+/*!
+ * \brief Journal entry flags.
+ */
+typedef enum journal_flag_t {
+	JOURNAL_NULL  = 0 << 0, /*!< Invalid journal entry. */
+	JOURNAL_FREE  = 1 << 0, /*!< Free journal entry. */
+	JOURNAL_VALID = 1 << 1, /*!< Valid journal entry. */
+	JOURNAL_DIRTY = 1 << 2  /*!< Journal entry cannot be evicted. */
+} journal_flag_t;
+
+/*!
+ * \brief Journal node structure.
+ *
+ * Each node represents journal entry and points
+ * to position of the data in the permanent storage.
+ */
+typedef struct journal_node_t
+{
+	uint64_t id;    /*!< Node ID. */
+	uint16_t flags; /*!< Node flags. */
+	uint32_t pos;   /*!< Position in journal file. */
+	uint32_t len;   /*!< Entry data length. */
+} journal_node_t;
+
+/*!
+ * \brief Journal structure.
+ *
+ * Journal organizes entries as nodes.
+ * Nodes are stored in-memory for fast lookup and also
+ * backed by a permanent storage.
+ * Each journal has a fixed number of nodes.
+ *
+ * \todo Organize nodes in an advanced structure, like
+ *       btree or hash table to improve lookup time.
+ */
+typedef struct journal_t
+{
+	int fd;
+	struct flock fl;        /*!< File lock. */
+	uint16_t max_nodes;     /*!< Number of nodes. */
+	uint16_t qhead;         /*!< Node queue head. */
+	uint16_t qtail;         /*!< Node queue tail. */
+	uint16_t bflags;        /*!< Initial flags for each written node. */
+	size_t fsize;           /*!< Journal file size. */
+	size_t fslimit;         /*!< File size limit. */
+	journal_node_t free;    /*!< Free segment. */
+	journal_node_t nodes[]; /*!< Array of nodes. */
+} journal_t;
+
+/*!
+ * \brief Entry identifier compare function.
+ *
+ * \retval -n if k1 < k2
+ * \retval +n if k1 > k2
+ * \retval  0 if k1 == k2
+ */
+typedef int (*journal_cmp_t)(uint64_t k1, uint64_t k2);
+
+/*!
+ * \brief Function prototype for journal_walk() function.
+ *
+ * \param j Associated journal.
+ * \param n Pointer to target node.
+ */
+typedef int (*journal_apply_t)(journal_t *j, journal_node_t *n);
+
+/*
+ * Journal defaults and constants.
+ */
+#define JOURNAL_NCOUNT 1024 /*!< Default node count. */
+#define JOURNAL_HSIZE (sizeof(uint16_t) * 3) /*!< max_entries, qhead, qtail */
+
+/*!
+ * \brief Create new journal.
+ *
+ * \param fn Journal file name, will be created if not exist.
+ * \param max_nodes Maximum number of nodes in journal.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_EINVAL if the file with given name cannot be created.
+ * \retval KNOTD_ERROR on I/O error.
+ */
+int journal_create(const char *fn, uint16_t max_nodes);
+
+/*!
+ * \brief Open journal file for read/write.
+ *
+ * \param fn Journal file name.
+ * \param fslimit File size limit (0 for no limit).
+ * \param bflags Initial flags for each written node.
+ *
+ * \retval new journal instance if successful.
+ * \retval NULL on error.
+ */
+journal_t* journal_open(const char *fn, size_t fslimit, uint16_t bflags);
+
+/*!
+ * \brief Fetch entry node for given identifier.
+ *
+ * \param journal Associated journal.
+ * \param id Entry identifier.
+ * \param cf Compare function (NULL for equality).
+ * \param dst Destination for journal entry.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_ENOENT if not found.
+ */
+int journal_fetch(journal_t *journal, uint64_t id,
+		  journal_cmp_t cf, journal_node_t** dst);
+
+/*!
+ * \brief Read journal entry data.
+ *
+ * \param journal Associated journal.
+ * \param id Entry identifier.
+ * \param cf Compare function (NULL for equality).
+ * \param dst Pointer to destination memory.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_ENOENT if the entry cannot be found.
+ * \retval KNOTD_EINVAL if the entry is invalid.
+ * \retval KNOTD_ERROR on I/O error.
+ */
+int journal_read(journal_t *journal, uint64_t id, journal_cmp_t cf, char *dst);
+
+/*!
+ * \brief Write journal entry data.
+ *
+ * \param journal Associated journal.
+ * \param id Entry identifier.
+ * \param src Pointer to source data.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_EAGAIN if no free node is available, need to remove dirty nodes.
+ * \retval KNOTD_ERROR on I/O error.
+ */
+int journal_write(journal_t *journal, uint64_t id, const char *src, size_t size);
+
+/*!
+ * \brief Return least recent node (journal head).
+ *
+ * \param journal Associated journal.
+ *
+ * \retval node if successful.
+ * \retval NULL if empty.
+ */
+static inline journal_node_t *journal_head(journal_t *journal) {
+	return journal->nodes + journal->qhead;
+}
+
+/*!
+ * \brief Return node after most recent node (journal tail).
+ *
+ * \param journal Associated journal.
+ *
+ * \retval node if successful.
+ * \retval NULL if empty.
+ */
+static inline journal_node_t *journal_end(journal_t *journal) {
+	return journal->nodes +  journal->qtail;
+}
+
+/*!
+ * \brief Apply function to each node.
+ *
+ * \param journal Associated journal.
+ * \param apply Function to apply to each node.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int journal_walk(journal_t *journal, journal_apply_t apply);
+
+/*!
+ * \brief Sync node state to permanent storage.
+ *
+ * \note May be used for journal_walk().
+ *
+ * \param journal Associated journal.
+ * \param n Pointer to node (must belong to associated journal).
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int journal_update(journal_t *journal, journal_node_t *n);
+
+/*!
+ * \brief Close journal file.
+ *
+ * \param journal Associated journal.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameter.
+ */
+int journal_close(journal_t *journal);
+
+#endif /* _KNOTD_JOURNAL_H_ */
diff --git a/src/knot/server/notify.c b/src/knot/server/notify.c
new file mode 100644
index 0000000..3966b26
--- /dev/null
+++ b/src/knot/server/notify.c
@@ -0,0 +1,327 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "knot/server/notify.h"
+
+#include "libknot/dname.h"
+#include "libknot/packet/packet.h"
+#include "libknot/rrset.h"
+#include "libknot/packet/response.h"
+#include "libknot/packet/query.h"
+#include "libknot/consts.h"
+#include "knot/other/error.h"
+#include "libknot/zone/zonedb.h"
+#include "libknot/common.h"
+#include "libknot/util/error.h"
+#include "libknot/util/wire.h"
+#include "knot/server/zones.h"
+#include "common/acl.h"
+#include "common/evsched.h"
+#include "knot/other/debug.h"
+#include "knot/server/server.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+static int notify_request(const knot_rrset_t *rrset,
+                          uint8_t *buffer, size_t *size)
+{
+	knot_packet_t *pkt = knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	CHECK_ALLOC_LOG(pkt, KNOTD_ENOMEM);
+
+	/*! \todo Get rid of the numeric constant. */
+	int rc = knot_packet_set_max_size(pkt, 512);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOTD_ERROR;
+	}
+
+	rc = knot_query_init(pkt);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOTD_ERROR;
+	}
+
+	knot_question_t question;
+
+	// this is ugly!!
+	question.qname = rrset->owner;
+	question.qtype = rrset->type;
+	question.qclass = rrset->rclass;
+
+	rc = knot_query_set_question(pkt, &question);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOTD_ERROR;
+	}
+
+	/* Set random query ID. */
+	knot_packet_set_random_id(pkt);
+	knot_wire_set_id(pkt->wireformat, pkt->header.id);
+
+	/*! \todo add the SOA RR to the Answer section as a hint */
+	/*! \todo this should not use response API!! */
+//	rc = knot_response_add_rrset_answer(pkt, rrset, 0, 0, 0);
+//	if (rc != KNOT_EOK) {
+//		knot_packet_free(&pkt);
+//		return rc;
+//	}
+
+	/*! \todo this should not use response API!! */
+	knot_response_set_aa(pkt);
+
+	knot_query_set_opcode(pkt, KNOT_OPCODE_NOTIFY);
+
+	/*! \todo OPT RR ?? */
+
+	uint8_t *wire = NULL;
+	size_t wire_size = 0;
+	rc = knot_packet_to_wire(pkt, &wire, &wire_size);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOTD_ERROR;
+	}
+
+	if (wire_size > *size) {
+		knot_packet_free(&pkt);
+		return KNOTD_ESPACE;
+	}
+
+	memcpy(buffer, wire, wire_size);
+	*size = wire_size;
+
+	knot_packet_dump(pkt);
+
+	knot_packet_free(&pkt);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int notify_create_response(knot_packet_t *request, uint8_t *buffer,
+                           size_t *size)
+{
+	knot_packet_t *response =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	CHECK_ALLOC_LOG(response, KNOTD_ENOMEM);
+
+	/* Set maximum packet size. */
+	knot_packet_set_max_size(response, *size);
+	knot_response_init_from_query(response, request);
+
+	// TODO: copy the SOA in Answer section
+	uint8_t *wire = NULL;
+	size_t wire_size = 0;
+	int rc = knot_packet_to_wire(response, &wire, &wire_size);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&response);
+		return rc;
+	}
+
+	if (wire_size > *size) {
+		knot_packet_free(&response);
+		return KNOTD_ESPACE;
+	}
+
+	memcpy(buffer, wire, wire_size);
+	*size = wire_size;
+
+	knot_packet_dump(response);
+	knot_packet_free(&response);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int notify_create_request(const knot_zone_contents_t *zone, uint8_t *buffer,
+                          size_t *size)
+{
+	const knot_rrset_t *soa_rrset = knot_node_rrset(
+		            knot_zone_contents_apex(zone), KNOT_RRTYPE_SOA);
+	if (soa_rrset == NULL) {
+		return KNOTD_ERROR;
+	}
+
+	return notify_request(soa_rrset, buffer, size);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int notify_check_and_schedule(knot_nameserver_t *nameserver,
+                                     const knot_zone_t *zone,
+                                     sockaddr_t *from)
+{
+	if (zone == NULL || from == NULL || knot_zone_data(zone) == NULL) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Check ACL for notify-in. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (from) {
+		if (acl_match(zd->notify_in, from) == ACL_DENY) {
+			/* rfc1996: Ignore request and report incident. */
+			char straddr[SOCKADDR_STRLEN];
+			sockaddr_tostr(from, straddr, sizeof(straddr));
+			log_zone_notice("Unauthorized NOTIFY query "
+			                "from %s:%d to zone '%s'.\n",
+			                straddr, sockaddr_portnum(from),
+			                zd->conf->name);
+			return KNOT_ERROR;
+		} else {
+			dbg_notify("notify: authorized NOTIFY query.\n");
+		}
+	}
+
+	/*! \todo Packet may contain updated RRs. */
+
+	/* Cancel REFRESH/RETRY timer. */
+	evsched_t *sched = ((server_t *)knot_ns_get_data(nameserver))->sched;
+	event_t *refresh_ev = zd->xfr_in.timer;
+	if (refresh_ev) {
+		dbg_notify("notify: expiring REFRESH timer\n");
+		evsched_cancel(sched, refresh_ev);
+
+		/* Set REFRESH timer for now. */
+		evsched_schedule(sched, refresh_ev, 0);
+	}
+	
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int notify_process_request(knot_nameserver_t *ns,
+                           knot_packet_t *notify,
+                           sockaddr_t *from,
+                           uint8_t *buffer, size_t *size)
+{
+	/*! \todo Most of this function is identical to xfrin_transfer_needed()
+	 *        - it will be fine to merge the code somehow.
+	 */
+
+	if (notify == NULL || ns == NULL || buffer == NULL
+	    || size == NULL || from == NULL) {
+		dbg_notify("notify: invalid parameters for %s()\n",
+		           "notify_process_request");
+		return KNOTD_EINVAL;
+	}
+
+	int ret = KNOTD_EOK;
+
+	dbg_notify("notify: parsing rest of the packet\n");
+	if (notify->parsed < notify->size) {
+		ret = knot_packet_parse_rest(notify);
+		if (ret != KNOT_EOK) {
+			dbg_notify("notify: failed to parse NOTIFY query\n");
+			knot_ns_error_response(ns, knot_packet_id(notify),
+					       KNOT_RCODE_FORMERR, buffer,
+					       size);
+			return KNOTD_EOK;
+		}
+	}
+
+	// create NOTIFY response
+	dbg_notify("notify: creating response\n");
+	ret = notify_create_response(notify, buffer, size);
+	if (ret != KNOTD_EOK) {
+		dbg_notify("notify: failed to create NOTIFY response\n");
+		knot_ns_error_response(ns, knot_packet_id(notify),
+				       KNOT_RCODE_SERVFAIL, buffer,
+				       size);
+		return KNOTD_EOK;
+	}
+
+	// find the zone
+	const knot_dname_t *qname = knot_packet_qname(notify);
+	const knot_zone_t *z = knot_zonedb_find_zone_for_name(
+			ns->zone_db, qname);
+	if (z == NULL) {
+		dbg_notify("notify: failed to find zone by name\n");
+		knot_ns_error_response(ns, knot_packet_id(notify),
+				       KNOT_RCODE_REFUSED, buffer,
+				       size);
+		return KNOTD_EOK;
+	}
+
+	notify_check_and_schedule(ns, z, from);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int notify_process_response(knot_nameserver_t *nameserver,
+                            knot_packet_t *notify,
+                            sockaddr_t *from,
+                            uint8_t *buffer, size_t *size)
+{
+	if (nameserver == NULL || notify == NULL || from == NULL 
+	    || buffer == NULL || size == NULL) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Assert no response size. */
+	*size = 0;
+
+	/* Find matching zone. */
+	const knot_dname_t *zone_name = knot_packet_qname(notify);
+	knot_zone_t *zone = knot_zonedb_find_zone(nameserver->zone_db,
+	                                              zone_name);
+	if (!zone) {
+		return KNOTD_ENOENT;
+	}
+	if (!knot_zone_data(zone)) {
+		return KNOTD_ENOENT;
+	}
+
+	/* Match ID against awaited. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	pthread_mutex_lock(&zd->lock);
+	uint16_t pkt_id = knot_packet_id(notify);
+	notify_ev_t *ev = 0, *match = 0;
+	WALK_LIST(ev, zd->notify_pending) {
+		if ((int)pkt_id == ev->msgid) {
+			match = ev;
+			break;
+		}
+	}
+
+	/* Found waiting NOTIFY query? */
+	if (!match) {
+		log_server_notice("No pending NOTIFY query found for ID=%u\n",
+			 pkt_id);
+		return KNOTD_ERROR;
+	}
+
+	/* NOTIFY is now finished. */
+	zones_cancel_notify(zd, match);
+
+	/* Zone was removed/reloaded. */
+	pthread_mutex_unlock(&zd->lock);
+
+	log_server_info("Received response for pending NOTIFY query ID=%u\n",
+		 pkt_id);
+
+	return KNOTD_EOK;
+}
+
diff --git a/src/knot/server/notify.h b/src/knot/server/notify.h
new file mode 100644
index 0000000..c1bebb8
--- /dev/null
+++ b/src/knot/server/notify.h
@@ -0,0 +1,128 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file notify.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief NOTIFY request/reply API.
+ *
+ * \addtogroup query_processing
+ * @{
+ */
+
+#ifndef _KNOTD_NOTIFY_H_
+#define _KNOTD_NOTIFY_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "libknot/zone/zone.h"
+#include "libknot/packet/packet.h"
+#include "libknot/zone/zonedb.h"
+#include "common/lists.h"
+#include "common/sockaddr.h"
+#include "libknot/nameserver/name-server.h"
+
+/*!
+ * \brief Pending NOTIFY event.
+ * \see knot_zone_t.notify_pending
+ */
+typedef struct notify_ev_t {
+	node n;
+	int timeout;           /*!< Timeout for events. */
+	int retries;           /*!< Number of retries. */
+	int msgid;             /*!< ID of pending NOTIFY. */
+	sockaddr_t addr;       /*!< Slave server address. */
+	struct event_t *timer; /*!< Event timer. */
+	knot_zone_t *zone;   /*!< Associated zone. */
+} notify_ev_t;
+
+/*!
+ * \brief Creates a NOTIFY request message for SOA RR of the given zone.
+ *
+ * \param zone Zone from which to take the SOA RR.
+ * \param buffer Buffer to fill the message in.
+ * \param size In: available space in the buffer. Out: actual size of the
+ *             message in bytes.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_ESPACE
+ * \retval KNOTD_ERROR
+ */
+int notify_create_request(const knot_zone_contents_t *zone, uint8_t *buffer,
+                          size_t *size);
+
+/*!
+ * \brief Creates a response for NOTIFY query.
+ *
+ * Valid NOTIFY query expires REFRESH timer for received qname.
+ *
+ * \see RFC1996 for query and response format.
+ *
+ * \param nameserver Name server structure to provide the needed data.
+ * \param query Response structure with parsed query.
+ * \param response_wire Place for the response in wire format.
+ * \param rsize Input: maximum acceptable size of the response. Output: real
+ *              size of the response.
+ *
+ * \retval KNOTD_EOK if a valid response was created.
+ * \retval KNOTD_EACCES sender is not authorized to request NOTIFY.
+ * \retval KNOTD_EMALF if an error occured and the response is not valid.
+ */
+/*!
+ * \brief Evaluates incoming NOTIFY request and produces a reply.
+ *
+ * \param notify (Partially) parsed packet with the NOTIFY request.
+ * \param zonedb Zone database of the server.
+ * \param zone Zone which is probably out-of-date or NULL if there either is no
+ *             zone corresponding to the request or if the zone is up-to-date.
+ * \param buffer Buffer to fill the message in.
+ * \param size In: available space in the buffer. Out: actual size of the
+ *             response message in bytes.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_EINVAL
+ * \retval KNOTD_EMALF
+ * \retval KNOTD_ERROR
+ */
+int notify_process_request(knot_nameserver_t *nameserver,
+                           knot_packet_t *notify,
+                           sockaddr_t *from,
+                           uint8_t *buffer, size_t *size);
+
+/*!
+ * \brief Processes NOTIFY response packet.
+ *
+ * \param nameserver Name server structure to provide the needed data.
+ * \param from Address of the response sender.
+ * \param packet Parsed response packet.
+ * \param response_wire Place for the response in wire format.
+ * \param rsize Input: maximum acceptable size of the response. Output: real
+ *              size of the response.
+ *
+ * \retval KNOTD_EOK if a valid response was created.
+ * \retval KNOTD_EINVAL on invalid parameters or packet.
+ * \retval KNOTD_EMALF if an error occured and the response is not valid.
+ */
+int notify_process_response(knot_nameserver_t *nameserver,
+                            knot_packet_t *notify,
+                            sockaddr_t *from,
+                            uint8_t *buffer, size_t *size);
+
+#endif /* _KNOTD_NOTIFY_H_ */
+
+/*! @} */
diff --git a/src/knot/server/server.c b/src/knot/server/server.c
new file mode 100644
index 0000000..80db35d
--- /dev/null
+++ b/src/knot/server/server.c
@@ -0,0 +1,730 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <openssl/evp.h>
+#include <assert.h>
+
+#include "knot/common.h"
+#include "knot/other/error.h"
+#include "knot/server/server.h"
+#include "knot/server/udp-handler.h"
+#include "knot/server/tcp-handler.h"
+#include "knot/server/xfr-handler.h"
+#include "libknot/nameserver/name-server.h"
+#include "knot/stat/stat.h"
+#include "libknot/zone/zonedb.h"
+#include "knot/zone/zone-load.h"
+#include "libknot/dname.h"
+#include "knot/conf/conf.h"
+#include "knot/server/zones.h"
+
+/*! \brief Event scheduler loop. */
+static int evsched_run(dthread_t *thread)
+{
+	iohandler_t *sched_h = (iohandler_t *)thread->data;
+	evsched_t *s = (evsched_t*)sched_h->data;
+	if (!s) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Run event loop. */
+	event_t *ev = 0;
+	while((ev = evsched_next(s))) {
+
+		/* Error. */
+		if (!ev) {
+			return KNOTD_ERROR;
+		}
+
+		/* Process termination event. */
+		if (ev->type == EVSCHED_TERM) {
+			evsched_event_finished(s);
+			evsched_event_free(s, ev);
+			break;
+		}
+
+		/* Process event. */
+		if (ev->type == EVSCHED_CB && ev->cb) {
+			ev->cb(ev);
+			evsched_event_finished(s);
+		} else {
+			evsched_event_finished(s);
+			evsched_event_free(s, ev);
+		}
+
+		/* Check for thread cancellation. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+	}
+
+	return KNOTD_EOK;
+}
+
+/*! \brief List item for generic pointers. */
+typedef struct pnode_t {
+	struct node *next, *prev; /* Keep the ordering for lib/lists.h */
+	void *p; /*!< \brief Useful data pointer. */
+} pnode_t;
+
+/*! \brief Unbind and dispose given interface. */
+static void server_remove_iface(iface_t *iface)
+{
+	/* Free UDP handler. */
+	iohandler_t *handler = iface->handler[UDP_ID];
+	if (handler) {
+		server_remove_handler(handler->server, handler);
+	} else {
+		if (iface->fd[UDP_ID] > -1) {
+			close(iface->fd[UDP_ID]);
+		}
+	}
+
+	/* Free TCP handler. */
+	handler = iface->handler[TCP_ID];
+	if (handler) {
+		server_remove_handler(handler->server, handler);
+	} else {
+		if (iface->fd[TCP_ID] > -1) {
+			close(iface->fd[TCP_ID]);
+		}
+	}
+
+	/* Free interface. */
+	free(iface->addr);
+	free(iface);
+}
+
+/*!
+ * \brief Initialize new interface from config value.
+ *
+ * Both TCP and UDP sockets will be created for the interface.
+ *
+ * \param new_if Allocated memory for the interface.
+ * \param cfg_if Interface template from config.
+ *
+ * \retval 0 if successful (EOK).
+ * \retval <0 on errors (EACCES, EINVAL, ENOMEM, EADDRINUSE).
+ */
+static int server_init_iface(iface_t *new_if, conf_iface_t *cfg_if)
+{
+	/* Initialize interface. */
+	char errbuf[128];
+	int opt = 1024 * 1024;
+	int snd_opt = 1024 * 1024;
+	memset(new_if, 0, sizeof(iface_t));
+
+	/* Create UDP socket. */
+	int sock = socket_create(cfg_if->family, SOCK_DGRAM);
+	if (sock <= 0) {
+		strerror_r(errno, errbuf, sizeof(errbuf));
+		log_server_error("Could not create UDP socket: %s.\n",
+				 errbuf);
+		return sock;
+	}
+	if (socket_bind(sock, cfg_if->family,
+	                cfg_if->address, cfg_if->port) < 0) {
+		socket_close(sock);
+		log_server_error("Could not bind to "
+		                 "UDP interface %s port %d.\n",
+		                 cfg_if->address, cfg_if->port);
+		return knot_map_errno(EACCES, EINVAL, ENOMEM);
+	}
+
+	new_if->fd[UDP_ID] = sock;
+	new_if->type[UDP_ID] = cfg_if->family;
+
+	/* Set socket options - voluntary. */
+	if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &snd_opt, sizeof(snd_opt)) < 0) {
+	//	log_server_warning("Failed to configure socket "
+	//	                   "write buffers.\n");
+	}
+	if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) < 0) {
+	//	log_server_warning("Failed to configure socket read buffers.\n");
+	}
+
+	/* Create TCP socket. */
+	int ret = 0;
+	sock = socket_create(cfg_if->family, SOCK_STREAM);
+	if (sock <= 0) {
+		socket_close(new_if->fd[UDP_ID]);
+		strerror_r(errno, errbuf, sizeof(errbuf));
+		log_server_error("Could not create TCP socket: %s.\n",
+				 errbuf);
+		return sock;
+	}
+
+	ret = socket_bind(sock, cfg_if->family, cfg_if->address, cfg_if->port);
+	if (ret < 0) {
+		socket_close(new_if->fd[UDP_ID]);
+		socket_close(sock);
+		log_server_error("Could not bind to "
+		                 "TCP interface %s port %d.\n",
+		                 cfg_if->address, cfg_if->port);
+		return ret;
+	}
+
+	ret = socket_listen(sock, TCP_BACKLOG_SIZE);
+	if (ret < 0) {
+		socket_close(new_if->fd[UDP_ID]);
+		socket_close(sock);
+		log_server_error("Failed to listen on "
+		                 "TCP interface %s port %d.\n",
+		                 cfg_if->address, cfg_if->port);
+		return ret;
+	}
+
+	new_if->fd[TCP_ID] = sock;
+	new_if->type[TCP_ID] = cfg_if->family;
+	new_if->port = cfg_if->port;
+	new_if->addr = strdup(cfg_if->address);
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Update bound sockets according to configuration.
+ *
+ * \param server Server instance.
+ * \return number of added sockets.
+ */
+static int server_bind_sockets(server_t *server)
+{
+	/*! \todo This requires locking to disable parallel updates. */
+
+	/* Lock configuration. */
+	conf_read_lock();
+
+	/* Prepare helper lists. */
+	int bound = 0;
+	node *m = 0;
+	list *newlist, unmatched;
+	newlist = malloc(sizeof(list));
+	init_list(newlist);
+	init_list(&unmatched);
+
+	/* Duplicate current list. */
+	/*! \note Pointers to addr, handlers etc. will be shared. */
+	list_dup(&unmatched, server->ifaces, sizeof(iface_t));
+
+	/* Update pointers. */
+	WALK_LIST(m, unmatched) {
+
+		/* Interfaces. */
+		iface_t *m_if = (iface_t*)m;
+		for (int i = 0; i <= TCP_ID; ++i) {
+			iohandler_t *h = m_if->handler[i];
+			if (h) {
+				h->iface = m_if;
+			}
+
+		}
+	}
+
+	/* Update bound interfaces. */
+	node *n = 0;
+	WALK_LIST(n, conf()->ifaces) {
+
+		/* Find already matching interface. */
+		int found_match = 0;
+		conf_iface_t *cfg_if = (conf_iface_t*)n;
+		WALK_LIST(m, unmatched) {
+			iface_t *srv_if = (iface_t*)m;
+
+			/* Matching port and address. */
+			if (cfg_if->port == srv_if->port) {
+				if (strcmp(cfg_if->address, srv_if->addr) == 0) {
+					found_match = 1;
+					break;
+				}
+			}
+		}
+
+		/* Found already bound interface. */
+		if (found_match) {
+			rem_node(m);
+		} else {
+
+			/* Create new interface. */
+			m = malloc(sizeof(iface_t));
+			if (server_init_iface((iface_t*)m, cfg_if) < 0) {
+				free(m);
+				m = 0;
+			}
+
+			log_server_info("Binding to interface %s port %d.\n",
+			                cfg_if->address, cfg_if->port);
+		}
+
+		/* Move to new list. */
+		if (m) {
+			add_tail(newlist, m);
+			++bound;
+		}
+	}
+
+	/* Unlock configuration. */
+	conf_read_unlock();
+
+	/* Publish new list. */
+	list* oldlist = rcu_xchg_pointer(&server->ifaces, newlist);
+
+	/* Ensure no one is reading old interfaces. */
+	synchronize_rcu();
+
+	/* Remove deprecated interfaces. */
+	WALK_LIST_DELSAFE(n, m, unmatched) {
+		iface_t *rm_if = (iface_t*)n;
+		log_server_info("Removing interface %s port %d.\n",
+		                rm_if->addr, rm_if->port);
+		server_remove_iface(rm_if);
+	}
+
+	/* Free original list. */
+	WALK_LIST_DELSAFE(n, m, *oldlist) {
+		/*! \note Need to keep internal pointers, as they are shared
+		 *        with the newly published list. */
+		free(n);
+	}
+	free(oldlist);
+
+	return bound;
+}
+
+/*!
+ * \brief Update socket handlers according to configuration.
+ *
+ * \param server Server instance.
+ * \retval 0 if successful (EOK).
+ * \retval <0 on errors (EINVAL).
+ */
+static int server_bind_handlers(server_t *server)
+{
+	if (!server || !server->ifaces) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Lock config. */
+	conf_read_lock();
+
+	/* Estimate number of threads/manager. */
+	int thr_count = 0;
+	int tcp_unit_size = 0;
+	if (conf()->workers < 1) {
+		thr_count = dt_optimal_size();
+		tcp_unit_size = (thr_count * 2) + 1; /* Will be always odd. */
+	} else {
+		thr_count = conf()->workers;
+		tcp_unit_size = thr_count + 1; /* Force configured value. */
+	}
+	
+	dbg_server("server: configured %d worker%s per UDP iface\n",
+	           thr_count, thr_count > 1 ? "s" : "");
+	dbg_server("server: configured %d worker%s per TCP iface\n",
+	           tcp_unit_size - 1, (tcp_unit_size - 1) > 1 ? "s" : "");
+
+	/* Create socket handlers. */
+	node *n = 0;
+	iohandler_t* h = 0;
+	WALK_LIST(n, *server->ifaces) {
+
+		iface_t *iface = (iface_t*)n;
+
+		/* Create UDP handlers. */
+		dt_unit_t *unit = 0;
+		if (!iface->handler[UDP_ID]) {
+			unit = dt_create_coherent(thr_count, &udp_master, 0);
+			h = server_create_handler(server, iface->fd[UDP_ID], unit);
+			h->type = iface->type[UDP_ID];
+			h->iface = iface;
+
+			/* Save pointer. */
+			rcu_set_pointer(&iface->handler[UDP_ID], h);
+			dbg_server("server: creating UDP socket handlers for '%s:%d'\n",
+			             iface->addr, iface->port);
+
+		}
+
+		/* Create TCP handlers. */
+		if (!iface->handler[TCP_ID]) {
+			unit = dt_create(tcp_unit_size);
+			h = server_create_handler(server, iface->fd[TCP_ID], unit);
+			tcp_loop_unit(h, unit);
+			h->type = iface->type[TCP_ID];
+			h->iface = iface;
+
+			/* Save pointer. */
+			rcu_set_pointer(&iface->handler[TCP_ID], h);
+			dbg_server("server: creating TCP socket handlers for '%s:%d'\n",
+			             iface->addr, iface->port);
+		}
+
+	}
+
+	/* Unlock config. */
+	conf_read_unlock();
+
+	return KNOTD_EOK;
+}
+
+server_t *server_create()
+{
+	// Create server structure
+	server_t *server = malloc(sizeof(server_t));
+	if (server == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	server->state = ServerIdle;
+	init_list(&server->handlers);
+	server->ifaces = malloc(sizeof(list));
+	init_list(server->ifaces);
+
+	// Create event scheduler
+	dbg_server("server: creating event scheduler\n");
+	server->sched = evsched_new();
+	dt_unit_t *unit = dt_create_coherent(1, evsched_run, 0);
+	iohandler_t *h = server_create_handler(server, -1, unit);
+	h->data = server->sched;
+
+	// Create name server
+	dbg_server("server: creating Name Server structure\n");
+	server->nameserver = knot_ns_create();
+	if (server->nameserver == NULL) {
+		free(server);
+		return NULL;
+	}
+	knot_ns_set_data(server->nameserver, server);
+	dbg_server("server: initializing OpenSSL\n");
+	OpenSSL_add_all_digests();
+
+	// Create XFR handler
+	server->xfr_h = xfr_create(XFR_THREADS_COUNT, server->nameserver);
+	if (!server->xfr_h) {
+		knot_ns_destroy(&server->nameserver);
+		free(server);
+		return NULL;
+	}
+
+	dbg_server("server: created server instance\n");
+	return server;
+}
+
+iohandler_t *server_create_handler(server_t *server, int fd, dt_unit_t *unit)
+{
+	// Create new worker
+	iohandler_t *handler = malloc(sizeof(iohandler_t));
+	if (handler == 0) {
+		ERR_ALLOC_FAILED;
+		return 0;
+	}
+
+	// Initialize
+	handler->fd = fd;
+	handler->type = 0;
+	handler->state = ServerIdle;
+	handler->server = server;
+	handler->unit = unit;
+	handler->iface = 0;
+	handler->data = 0;
+	handler->interrupt = 0;
+
+	// Update unit data object
+	for (int i = 0; i < unit->size; ++i) {
+		dthread_t *thread = unit->threads[i];
+		if (thread->run) {
+			dt_repurpose(thread, thread->run, handler);
+		}
+	}
+
+	/*! \todo This requires either RCU compatible ptr swap or locking. */
+
+	/* Lock RCU. */
+	rcu_read_lock();
+
+	// Update list
+	add_tail(&server->handlers, (node*)handler);
+
+	/* Unlock RCU. */
+	rcu_read_unlock();
+
+	return handler;
+}
+
+int server_remove_handler(server_t *server, iohandler_t *h)
+{
+	// Check
+	if (h == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Lock RCU. */
+	rcu_read_lock();
+
+	/*! \todo This requires either RCU compatible ptr swap or locking. */
+
+	// Remove node
+	rem_node((node*)h);
+
+	// Wait for dispatcher to finish
+	if (h->state & ServerRunning) {
+		h->state = ServerIdle;
+		dt_stop(h->unit);
+
+		/* Call interrupt handler. */
+		if (h->interrupt) {
+			h->interrupt(h);
+		}
+
+		dt_join(h->unit);
+	}
+
+	// Close socket
+	if (h->fd >= 0) {
+		socket_close(h->fd);
+		h->fd = -1;
+	}
+
+	// Update interface
+	if (h->iface) {
+		int id = UDP_ID;
+		if (h->iface->handler[TCP_ID] == h) {
+			id = TCP_ID;
+		}
+
+		h->iface->fd[id] = h->fd;
+		h->iface->handler[id] = 0;
+	}
+
+	/* Unlock RCU. */
+	rcu_read_unlock();
+
+	/* RCU synchronize. */
+	synchronize_rcu();
+
+	// Destroy dispatcher and worker
+	dt_delete(&h->unit);
+	free(h);
+	return KNOTD_EOK;
+}
+
+int server_start(server_t *server)
+{
+	// Check server
+	if (server == 0) {
+		return KNOTD_EINVAL;
+	}
+
+	dbg_server("server: starting server instance\n");
+
+	/* Start XFR handler. */
+	xfr_start(server->xfr_h);
+
+	/* Lock configuration. */
+	conf_read_lock();
+
+	// Start dispatchers
+	int ret = KNOTD_EOK;
+	server->state |= ServerRunning;
+	iohandler_t *h = 0;
+	WALK_LIST(h, server->handlers) {
+
+		/* Already running. */
+		if (h->state & ServerRunning) {
+			continue;
+		}
+
+		h->state = ServerRunning;
+		ret = dt_start(h->unit);
+		if (ret < 0) {
+			break;
+		}
+	}
+
+	/* Unlock configuration. */
+	conf_read_unlock();
+
+	dbg_server("server: server started\n");
+
+	return ret;
+}
+
+int server_wait(server_t *server)
+{
+	/* Join threading unit. */
+	xfr_join(server->xfr_h);
+	
+	/* Lock RCU. */
+	rcu_read_lock();
+
+	// Wait for handlers to finish
+	int ret = 0;
+	iohandler_t *h = 0, *nxt = 0;
+	WALK_LIST_DELSAFE(h, nxt, server->handlers) {
+
+		/* Unlock RCU. */
+		rcu_read_unlock();
+
+		/* Remove handler. */
+		int dret = dt_join(h->unit);
+		if (dret < 0) {
+			ret = dret;
+		}
+		server_remove_handler(server, h);
+
+		/* Relock RCU. */
+		rcu_read_lock();
+	}
+
+	/* Unlock RCU. */
+	rcu_read_unlock();
+
+	return ret;
+}
+
+void server_stop(server_t *server)
+{
+	dbg_server("server: stopping server\n");
+	
+	/* Wait for XFR master. */
+	xfr_stop(server->xfr_h);
+
+	/* Interrupt XFR handler execution. */
+	if (server->xfr_h->interrupt) {
+		server->xfr_h->interrupt(server->xfr_h);
+	}
+	
+	/* Send termination event. */
+	evsched_schedule_term(server->sched, 0);
+
+	/* Lock RCU. */
+	rcu_read_lock();
+
+	/* Notify servers to stop. */
+	log_server_info("Stopping server...\n");
+	server->state &= ~ServerRunning;
+	iohandler_t *h = 0;
+	WALK_LIST(h, server->handlers) {
+		h->state = ServerIdle;
+		dt_stop(h->unit);
+
+		/* Call interrupt handler. */
+		if (h->interrupt) {
+			h->interrupt(h);
+		}
+	}
+
+	/* Unlock RCU. */
+	rcu_read_unlock();
+}
+
+void server_destroy(server_t **server)
+{
+	// Check server
+	if (!server) {
+		return;
+	}
+	if (!*server) {
+		return;
+	}
+	
+	dbg_server("server: destroying server instance\n");
+	
+	// Free XFR master
+	xfr_free((*server)->xfr_h);
+
+	// Free interfaces
+	node *n = 0, *nxt = 0;
+	if ((*server)->ifaces) {
+		WALK_LIST_DELSAFE(n, nxt, *(*server)->ifaces) {
+			iface_t *iface = (iface_t*)n;
+			server_remove_iface(iface);
+		}
+		free((*server)->ifaces);
+	}
+
+	stat_static_gath_free();
+	knot_ns_destroy(&(*server)->nameserver);
+
+	// Delete event scheduler
+	evsched_delete(&(*server)->sched);
+
+	free(*server);
+
+	EVP_cleanup();
+
+	*server = NULL;
+}
+
+int server_conf_hook(const struct conf_t *conf, void *data)
+{
+	server_t *server = (server_t *)data;
+
+	if (!server) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Update bound sockets. */
+	int ret = KNOTD_EOK;
+	if ((ret = server_bind_sockets(server)) < 0) {
+		log_server_error("Failed to bind configured "
+		                 "interfaces.\n");
+		return KNOTD_ERROR;
+	}
+
+	/* Update handlers. */
+	if ((ret = server_bind_handlers(server)) < 0) {
+		log_server_error("Failed to create handlers for "
+		                 "configured interfaces.\n");
+		return ret;
+	}
+
+	/* Exit if the server is not running. */
+	if (!(server->state & ServerRunning)) {
+		return KNOTD_ENOTRUNNING;
+	}
+
+	/* Lock configuration. */
+	conf_read_lock();
+
+	/* Start new handlers. */
+	iohandler_t *h = 0;
+	WALK_LIST(h, server->handlers) {
+		if (!(h->state & ServerRunning)) {
+			h->state = ServerRunning;
+			ret = dt_start(h->unit);
+			if (ret < 0) {
+				log_server_error("Handler for %s:%d "
+				                 "has failed to start.\n",
+				                  h->iface->addr,
+				                  h->iface->port);
+				break;
+			}
+		}
+	}
+
+	/* Unlock config. */
+	conf_read_unlock();
+
+	return ret;
+}
+
diff --git a/src/knot/server/server.h b/src/knot/server/server.h
new file mode 100644
index 0000000..480219b
--- /dev/null
+++ b/src/knot/server/server.h
@@ -0,0 +1,211 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file server.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Core server functions.
+ *
+ * Contains the main high-level server structure (server_t) and interface
+ * to functions taking care of proper initialization of the server and clean-up
+ * when terminated.
+ *
+ * As of now, the server supports only one zone file and only in a special
+ * format.
+ *
+ * \see zone-parser.h
+ *
+ * \addtogroup server
+ * @{
+ */
+
+#ifndef _KNOTD_SERVER_H_
+#define _KNOTD_SERVER_H_
+
+#include "knot/common.h"
+#include "libknot/nameserver/name-server.h"
+#include "knot/server/xfr-handler.h"
+#include "knot/server/socket.h"
+#include "knot/server/dthreads.h"
+#include "libknot/zone/zonedb.h"
+#include "common/evsched.h"
+#include "common/lists.h"
+
+/* Forwad declarations. */
+struct iface_t;
+struct iohandler_t;
+struct server_t;
+struct conf_t;
+
+/*! \brief I/O handler structure.
+  */
+typedef struct iohandler_t {
+	struct node *next, *prev;
+	int                fd;      /*!< I/O filedescriptor */
+	int                type;    /*!< Descriptor type/family. */
+	unsigned           state;   /*!< Handler state */
+	dt_unit_t          *unit;   /*!< Threading unit */
+	struct iface_t     *iface;  /*!< Reference to associated interface. */
+	struct server_t    *server; /*!< Reference to server */
+	void               *data;   /*!< Persistent data for I/O handler. */
+	void (*interrupt)(struct iohandler_t *h); /*!< Interrupt handler. */
+
+} iohandler_t;
+
+/*! \brief Round-robin mechanism of switching.
+  */
+#define get_next_rr(current, count) \
+	(((current) + 1) % (count))
+
+/*! \brief Server state flags.
+ */
+typedef enum {
+	ServerIdle    = 0 << 0, /*!< Server is idle. */
+	ServerRunning = 1 << 0  /*!< Server is running. */
+} server_state;
+
+/*!
+ * \brief Server interface structure.
+ */
+typedef struct iface_t {
+	struct node *next, *prev;
+	int fd[2];   /*!< \brief Socket filedescriptors (UDP, TCP). */
+	int type[2]; /*!< \brief Socket type. */
+	int port;    /*!< \brief Socket port. */
+	char* addr;  /*!< \brief Socket address. */
+	iohandler_t* handler[2]; /*!< \brief Associated I/O handlers. */
+} iface_t;
+
+/* Interface indexes. */
+#define UDP_ID 0
+#define TCP_ID 1
+
+/*!
+ * \brief Main server structure.
+ *
+ * Keeps references to all important structures needed for operation.
+ */
+typedef struct server_t {
+
+	/*! \brief Server state tracking. */
+	volatile unsigned state;
+
+	/*! \brief Reference to the name server structure. */
+	knot_nameserver_t *nameserver;
+
+	/*! \brief XFR handler. */
+	xfrhandler_t *xfr_h;
+
+	/*! \brief Event scheduler. */
+	evsched_t *sched;
+
+	/*! \brief I/O handlers list. */
+	list handlers;
+
+	/*! \brief List of interfaces. */
+	list* ifaces;
+
+} server_t;
+
+/*!
+ * \brief Allocates and initializes the server structure.
+ *
+ * Creates all other main structures.
+ *
+ * \retval New instance if successful.
+ * \retval NULL If an error occured.
+ */
+server_t *server_create();
+
+/*!
+ * \brief Create and bind handler to given filedescriptor.
+ *
+ * Pointer to handler instance is used as native unique identifier.
+ * This requests instance not to be reallocated.
+ *
+ * \param server Server structure to be used for operation.
+ * \param fd I/O filedescriptor.
+ * \param unit Threading unit to serve given filedescriptor.
+ *
+ * \retval Handler instance if successful.
+ * \retval NULL If an error occured.
+ */
+iohandler_t *server_create_handler(server_t *server, int fd, dt_unit_t *unit);
+
+/*!
+ * \brief Delete handler.
+ *
+ * \param server Server structure to be used for operation.
+ * \param ref I/O handler instance.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ */
+int server_remove_handler(server_t *server, iohandler_t *ref);
+
+/*!
+ * \brief Starts the server.
+ *
+ * \param server Server structure to be used for operation.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ *
+ * \todo When a module for configuration is added, the filename parameter will
+ *       be removed.
+ */
+int server_start(server_t *server);
+
+/*!
+ * \brief Waits for the server to finish.
+ *
+ * \param server Server structure to be used for operation.
+ *
+ * \retval  0 On success (EOK).
+ * \retval <0 If an error occured (EINVAL).
+ */
+int server_wait(server_t *server);
+
+/*!
+ * \brief Requests server to stop.
+ *
+ * \param server Server structure to be used for operation.
+ */
+void server_stop(server_t *server);
+
+/*!
+ * \brief Properly destroys the server structure.
+ *
+ * \param server Server structure to be used for operation.
+ */
+void server_destroy(server_t **server);
+
+/*!
+ * \brief Server config hook.
+ *
+ * Routine for dynamic server reconfiguration.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ENOTRUNNING if the server is not running.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int server_conf_hook(const struct conf_t *conf, void *data);
+
+#endif // _KNOTD_SERVER_H_
+
+/*! @} */
diff --git a/src/knot/server/socket.c b/src/knot/server/socket.c
new file mode 100644
index 0000000..d3dd664
--- /dev/null
+++ b/src/knot/server/socket.c
@@ -0,0 +1,192 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+
+#include "knot/other/error.h"
+#include "knot/common.h"
+#include "knot/server/socket.h"
+
+int socket_create(int family, int type)
+{
+	/* Create socket. */
+	int ret = socket(family, type, 0);
+	if (ret < 0) {
+		return knot_map_errno(EACCES, EINVAL, ENOMEM);
+	}
+
+	return ret;
+}
+
+int socket_connect(int fd, const char *addr, unsigned short port)
+{
+	/* NULL address => any */
+	if (!addr) {
+		addr = "0.0.0.0";
+	}
+
+	/* Resolve address. */
+	int ret = KNOTD_EOK;
+	struct addrinfo hints, *res;
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	if ((ret = getaddrinfo(addr, NULL, &hints, &res)) != 0) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Evaluate address type. */
+	struct sockaddr *saddr = 0;
+	socklen_t addrlen = 0;
+#ifndef DISABLE_IPV6
+	if (res->ai_family == AF_INET6) {
+		struct sockaddr_in6 *ipv6 = (struct sockaddr_in6*)res->ai_addr;
+		ipv6->sin6_port = htons(port);
+		saddr = (struct sockaddr*)ipv6;
+		addrlen = sizeof(struct sockaddr_in6);
+	}
+#endif
+	if (res->ai_family == AF_INET) {
+		struct sockaddr_in *ipv4 = (struct sockaddr_in*)res->ai_addr;
+		ipv4->sin_port = htons(port);
+		saddr = (struct sockaddr*)ipv4;
+		addrlen = sizeof(struct sockaddr_in);
+	}
+
+	/* Connect. */
+	ret = -1;
+	if (addr) {
+		ret = connect(fd, saddr, addrlen);
+		if (ret < 0) {
+			ret = knot_map_errno(EACCES, EADDRINUSE, EAGAIN,
+			                     ECONNREFUSED, EISCONN);
+		}
+	} else {
+		ret = KNOTD_EINVAL;
+	}
+
+
+	/* Free addresses. */
+	freeaddrinfo(res);
+
+	return ret;
+}
+
+int socket_bind(int socket, int family, const char *addr, unsigned short port)
+{
+	/* Check address family. */
+	struct sockaddr* paddr = 0;
+	socklen_t addrlen = 0;
+	struct sockaddr_in saddr;
+#ifndef DISABLE_IPV6
+	struct sockaddr_in6 saddr6;
+#endif
+	if (family == AF_INET) {
+
+		/* Initialize socket address. */
+		paddr = (struct sockaddr*)&saddr;
+		addrlen = sizeof(saddr);
+		if (getsockname(socket, paddr, &addrlen) < 0) {
+			return KNOTD_EINVAL;
+		}
+
+		/* Set address and port. */
+		saddr.sin_port = htons(port);
+		if (inet_pton(family, addr, &saddr.sin_addr) < 0) {
+			saddr.sin_addr.s_addr = INADDR_ANY;
+			char buf[INET_ADDRSTRLEN];
+			inet_ntop(family, &saddr.sin_addr, buf, sizeof(buf));
+			log_server_error("Address '%s' is invalid, "
+			                 "using '%s' instead.\n",
+			                 addr, buf);
+
+		}
+
+	} else {
+
+#ifdef DISABLE_IPV6
+		log_server_error("ipv6 support disabled\n");
+		return KNOTD_ENOIPV6;
+#else
+		/* Initialize socket address. */
+		paddr = (struct sockaddr*)&saddr6;
+		addrlen = sizeof(saddr6);
+		if (getsockname(socket, paddr, &addrlen) < 0) {
+			return KNOTD_EINVAL;
+		}
+
+		/* Set address and port. */
+		saddr6.sin6_port = htons(port);
+		if (inet_pton(family, addr, &saddr6.sin6_addr) < 0) {
+			memcpy(&saddr6.sin6_addr, &in6addr_any, sizeof(in6addr_any));
+			char buf[INET6_ADDRSTRLEN];
+			inet_ntop(family, &saddr6.sin6_addr, buf, sizeof(buf));
+			log_server_error("Address '%s' is invalid, "
+			                 "using '%s' instead\n",
+			                 addr, buf);
+
+		}
+#endif
+	}
+
+	/* Reuse old address if taken. */
+	int flag = 1;
+	int ret = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR,
+	                     &flag, sizeof(flag));
+	if (ret < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Bind to specified address. */
+	int res = bind(socket, paddr, addrlen);
+	if (res < 0) {
+		log_server_error("Cannot bind to socket (%d).\n",
+		                 errno);
+		return knot_map_errno(EADDRINUSE, EINVAL, EACCES, ENOMEM);
+	}
+
+	return KNOTD_EOK;
+}
+
+int socket_listen(int socket, int backlog_size)
+{
+	int ret = listen(socket, backlog_size);
+	if (ret < 0) {
+		return knot_map_errno(EADDRINUSE);
+	}
+
+	return KNOTD_EOK;
+}
+
+int socket_close(int socket)
+{
+	if (close(socket) < 0) {
+		return KNOTD_EINVAL;
+	}
+
+	return KNOTD_EOK;
+}
+
diff --git a/src/knot/server/socket.h b/src/knot/server/socket.h
new file mode 100644
index 0000000..dff5216
--- /dev/null
+++ b/src/knot/server/socket.h
@@ -0,0 +1,120 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file socket.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief Generic sockets APIs.
+ *
+ * This file provides platform-independent sockets.
+ * Functions work on sockets created via system socket(2) functions.
+ *
+ * You can use standard I/O functions send(), sendto(), recv(), recvfrom()
+ * like you would with a normal sockets.
+ *
+ * \addtogroup network
+ * @{
+ */
+
+#ifndef _KNOTD_SOCKET_H_
+#define _KNOTD_SOCKET_H_
+
+/* POSIX only. */
+#include <sys/socket.h>
+#include "common/sockaddr.h"
+
+/*! \brief Socket-related constants. */
+typedef enum {
+	SOCKET_MTU_SZ = 8192,  /*!< \todo Determine UDP MTU size. */
+} socket_const_t;
+
+/*!
+ * \brief Create socket.
+ *
+ * \param family Socket family (PF_INET, PF_IPX, PF_PACKET, PF_UNIX).
+ * \param type   Socket type (SOCK_STREAM, SOCK_DGRAM, SOCK_RAW).
+ *
+ * \retval new socket filedescriptor on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOMEM out of memory error.
+ * \retval KNOTD_EACCES process does not have appropriate privileges.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int socket_create(int family, int type);
+
+/*!
+ * \brief Connect to remote host.
+ *
+ * \param fd     Socket filedescriptor.
+ * \param addr   Requested address.
+ * \param port   Requested port.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ * \retval KNOTD_EACCES process does not have appropriate privileges.
+ * \retval KNOTD_EAGAIN lack of resources, try again.
+ * \retval KNOTD_EADDRINUSE address already in use.
+ * \retval KNOTD_ECONNREFUSED connection refused.
+ * \retval KNOTD_EISCONN already connected.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int socket_connect(int fd, const char *addr, unsigned short port);
+
+/*!
+ * \brief Listen on given socket.
+ *
+ * \param fd     Socket filedescriptor.
+ * \param family Socket family.
+ * \param addr   Requested address.
+ * \param port   Requested port.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ * \retval KNOTD_EACCES process does not have appropriate privileges.
+ * \retval KNOTD_EADDRINUSE address already in use.
+ * \retval KNOTD_ENOMEM out of memory error.
+ * \retval KNOTD_ENOIPV6 IPv6 support is not available.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int socket_bind(int fd, int family, const char *addr, unsigned short port);
+
+/*!
+ * \brief Listen on given TCP socket.
+ *
+ * \param fd           Socket filedescriptor.
+ * \param backlog_size Requested TCP backlog size.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EADDRINUSE address already in use.
+ * \retval KNOTD_ERROR unspecified error.
+ */
+int socket_listen(int fd, int backlog_size);
+
+/*!
+ * \brief Close and deinitialize socket.
+ *
+ * \param fd Socket filedescriptor.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int socket_close(int fd);
+
+
+#endif // _KNOTD_SOCKET_H_
+
+/*! @} */
diff --git a/src/knot/server/tcp-handler.c b/src/knot/server/tcp-handler.c
new file mode 100644
index 0000000..db58fef
--- /dev/null
+++ b/src/knot/server/tcp-handler.c
@@ -0,0 +1,511 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <netinet/tcp.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "common/sockaddr.h"
+#include "common/skip-list.h"
+#include "common/fdset.h"
+#include "knot/common.h"
+#include "knot/server/tcp-handler.h"
+#include "knot/server/xfr-handler.h"
+#include "libknot/nameserver/name-server.h"
+#include "knot/other/error.h"
+#include "knot/stat/stat.h"
+#include "libknot/util/wire.h"
+#include "knot/server/zones.h"
+
+/*! \brief TCP worker data. */
+typedef struct tcp_worker_t {
+	iohandler_t *ioh; /*!< Shortcut to I/O handler. */
+	fdset_t *fdset;   /*!< File descriptor set. */ 
+	int pipe[2];      /*!< Master-worker signalization pipes. */
+} tcp_worker_t;
+
+/*
+ * Forward decls.
+ */
+
+/*! \brief Wrapper for TCP send. */
+static int xfr_send_cb(int session, sockaddr_t *addr, uint8_t *msg, size_t msglen)
+{
+	UNUSED(addr);
+	return tcp_send(session, msg, msglen);
+}
+
+/*!
+ * \brief TCP event handler function.
+ *
+ * Handle single TCP event.
+ *
+ * \param w Associated I/O event.
+ * \param revents Returned events.
+ */
+static void tcp_handle(tcp_worker_t *w, int fd)
+{
+	if (fd < 0 || !w || !w->ioh) {
+		dbg_net("tcp: tcp_handle(%p, %d) - invalid parameters\n", w, fd);
+		return;
+	}
+	
+	dbg_net("tcp: handling TCP event on fd=%d in thread %p.\n",
+	        fd, (void*)pthread_self());
+
+	knot_nameserver_t *ns = w->ioh->server->nameserver;
+	xfrhandler_t *xfr_h = w->ioh->server->xfr_h;
+
+	/* Check address type. */
+	sockaddr_t addr;
+	if (sockaddr_init(&addr, w->ioh->type) != KNOTD_EOK) {
+		log_server_error("Socket type %d is not supported, "
+				 "IPv6 support is probably disabled.\n",
+				 w->ioh->type);
+		return;
+	}
+
+	/* Receive data. */
+	uint8_t qbuf[65535]; /*! \todo This may be problematic. */
+	size_t qbuf_maxlen = sizeof(qbuf);
+	int n = tcp_recv(fd, qbuf, qbuf_maxlen, &addr);
+	if (n <= 0) {
+		dbg_net("tcp: client on fd=%d disconnected\n", fd);
+		fdset_remove(w->fdset, fd);
+		close(fd);
+		return;
+	}
+
+	/* Parse query. */
+//	knot_response_t *resp = knot_response_new(qbuf_maxlen);
+	size_t resp_len = qbuf_maxlen; // 64K
+
+	/* Parse query. */
+	knot_packet_type_t qtype = KNOT_QUERY_NORMAL;
+
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	if (packet == NULL) {
+		uint16_t pkt_id = knot_wire_get_id(qbuf);
+		knot_ns_error_response(ns, pkt_id, KNOT_RCODE_SERVFAIL,
+				  qbuf, &resp_len);
+		return;
+	}
+
+	int res = knot_ns_parse_packet(qbuf, n, packet, &qtype);
+	if (unlikely(res != KNOTD_EOK)) {
+
+		/* Send error response on dnslib RCODE. */
+		if (res > 0) {
+			uint16_t pkt_id = knot_wire_get_id(qbuf);
+			knot_ns_error_response(ns, pkt_id, res,
+					  qbuf, &resp_len);
+		}
+
+//		knot_response_free(&resp);
+		knot_packet_free(&packet);
+		return;
+	}
+
+	/* Handle query. */
+	knot_ns_xfr_t xfr;
+	res = KNOTD_ERROR;
+	switch(qtype) {
+
+	/* Query types. */
+	case KNOT_QUERY_NORMAL:
+		res = knot_ns_answer_normal(ns, packet, qbuf, &resp_len);
+		break;
+	case KNOT_QUERY_IXFR:
+		res = xfr_request_init(&xfr, XFR_TYPE_IOUT, XFR_FLAG_TCP, packet);
+		if (res != KNOTD_EOK) {
+			knot_ns_error_response(ns, knot_packet_id(packet),
+			                       KNOT_RCODE_SERVFAIL, qbuf,
+			                       &resp_len);
+			res = KNOTD_EOK;
+			break;
+		}
+		xfr.send = xfr_send_cb;
+		xfr.session = fd;
+		memcpy(&xfr.addr, &addr, sizeof(sockaddr_t));
+		xfr_request(xfr_h, &xfr);
+		dbg_net("tcp: enqueued IXFR query on fd=%d\n", fd);
+		return;
+	case KNOT_QUERY_AXFR:
+		res = xfr_request_init(&xfr, XFR_TYPE_AOUT, XFR_FLAG_TCP, packet);
+		if (res != KNOTD_EOK) {
+			knot_ns_error_response(ns, knot_packet_id(packet),
+			                       KNOT_RCODE_SERVFAIL, qbuf,
+			                       &resp_len);
+			res = KNOTD_EOK;
+			break;
+		}
+		xfr.send = xfr_send_cb;
+		xfr.session = fd;
+		memcpy(&xfr.addr, &addr, sizeof(sockaddr_t));
+		xfr_request(xfr_h, &xfr);
+		dbg_net("tcp: enqueued AXFR query on fd=%d\n", fd);
+		return;
+		
+	/*! \todo Implement query notify/update. */
+	case KNOT_QUERY_UPDATE:
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_NOTIMPL, qbuf,
+				       &resp_len);
+		res = KNOTD_EOK;
+		break;
+		
+	/* Unhandled opcodes. */
+	case KNOT_QUERY_NOTIFY:    /*!< Only in UDP. */
+	case KNOT_RESPONSE_NOTIFY: /*!< Only in UDP. */
+	case KNOT_RESPONSE_NORMAL: /*!< TCP handler doesn't send queries. */
+	case KNOT_RESPONSE_AXFR:   /*!< Processed in XFR handler. */
+	case KNOT_RESPONSE_IXFR:   /*!< Processed in XFR handler. */
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_REFUSED, qbuf,
+				       &resp_len);
+		res = KNOTD_EOK;
+		break;
+		
+	/* Unknown opcodes. */
+	default:
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_FORMERR, qbuf,
+				       &resp_len);
+		res = KNOTD_EOK;
+		break;
+	}
+
+	knot_packet_free(&packet);
+
+	/* Send answer. */
+	if (res == KNOTD_EOK) {
+		
+		dbg_net("tcp: got answer of size %zd.\n",
+		        resp_len);
+		
+		assert(resp_len > 0);
+		res = tcp_send(fd, qbuf, resp_len);
+
+		/* Check result. */
+		if (res != (int)resp_len) {
+			dbg_net("tcp: %s: failed: %d - %d.\n",
+				  "socket_send()",
+				  res, errno);
+		}
+	} else {
+		dbg_net("tcp: failed to respond to query type=%d on fd=%d - %s\n",
+		        qtype, fd, knotd_strerror(res));;
+	}
+
+	return;
+}
+
+static int tcp_accept(int fd)
+{
+	/* Accept incoming connection. */
+	int incoming = accept(fd, 0, 0);
+
+	/* Evaluate connection. */
+	if (incoming < 0) {
+		if (errno != EINTR) {
+			log_server_error("Cannot accept connection "
+					 "(%d).\n", errno);
+		}
+	} else {
+		dbg_net("tcp: accepted connection fd=%d\n", incoming);
+	}
+
+	return incoming;
+}
+
+tcp_worker_t* tcp_worker_create()
+{
+	tcp_worker_t *w = malloc(sizeof(tcp_worker_t));
+	if (!w) {
+		dbg_net("tcp: out of memory when creating worker\n");
+		return 0;
+	}
+	
+	/* Create signal pipes. */
+	memset(w, 0, sizeof(tcp_worker_t));
+	if (pipe(w->pipe) < 0) {
+		free(w);
+		return 0;
+	}
+	
+	/* Create fdset. */
+	w->fdset = fdset_new();
+	if (!w->fdset) {
+		close(w->pipe[0]);
+		close(w->pipe[1]);
+		free(w);
+	}
+	
+	fdset_add(w->fdset, w->pipe[0], OS_EV_READ);
+	
+	return w;
+}
+
+void tcp_worker_free(tcp_worker_t* w)
+{
+	if (!w) {
+		return;
+	}
+	
+	/* Destroy fdset. */
+	fdset_destroy(w->fdset);
+	
+	/* Close pipe write end and worker. */
+	close(w->pipe[0]);
+	close(w->pipe[1]);
+	free(w);
+}
+
+/*
+ * Public APIs.
+ */
+
+int tcp_send(int fd, uint8_t *msg, size_t msglen)
+{
+
+	/*! \brief TCP corking.
+	 *  \see http://vger.kernel.org/~acme/unbehaved.txt
+	 */
+#ifdef TCP_CORK
+	int cork = 1;
+	setsockopt(fd, SOL_TCP, TCP_CORK, &cork, sizeof(cork));
+#endif
+
+	/* Send message size. */
+	unsigned short pktsize = htons(msglen);
+	int sent = send(fd, &pktsize, sizeof(pktsize), 0);
+	if (sent < 0) {
+		return KNOTD_ERROR;
+	}
+
+	/* Send message data. */
+	sent = send(fd, msg, msglen, 0);
+	if (sent < 0) {
+		return KNOTD_ERROR;
+	}
+
+#ifdef TCP_CORK
+	/* Uncork. */
+	cork = 0;
+	setsockopt(fd, SOL_TCP, TCP_CORK, &cork, sizeof(cork));
+#endif
+	return sent;
+}
+
+int tcp_recv(int fd, uint8_t *buf, size_t len, sockaddr_t *addr)
+{
+	/* Receive size. */
+	unsigned short pktsize = 0;
+	int n = recv(fd, &pktsize, sizeof(unsigned short), MSG_WAITALL);
+	if (n < 0) {
+		return KNOTD_ERROR;
+	}
+
+	pktsize = ntohs(pktsize);
+
+	// Check packet size for NULL
+	if (pktsize == 0) {
+		return KNOTD_ERROR;
+	}
+
+	dbg_net("tcp: incoming packet size=%hu on fd=%d\n",
+		  pktsize, fd);
+
+	// Check packet size
+	if (len < pktsize) {
+		return KNOTD_ENOMEM;
+	}
+
+	/* Receive payload. */
+	n = recv(fd, buf, pktsize, MSG_WAITALL);
+
+	/* Get peer name. */
+	if (addr) {
+		socklen_t alen = addr->len;
+		getpeername(fd, addr->ptr, &alen);
+	}
+
+	dbg_net("tcp: received packet size=%d on fd=%d\n",
+		  n, fd);
+
+	return n;
+}
+
+int tcp_loop_master(dthread_t *thread)
+{
+	iohandler_t *handler = (iohandler_t *)thread->data;
+	dt_unit_t *unit = thread->unit;
+	tcp_worker_t **workers = handler->data;
+
+	/* Check socket. */
+	if (!handler || handler->fd < 0 || !workers) {
+		dbg_net("tcp: failed to initialize master thread\n");
+		return KNOTD_EINVAL;
+	}
+
+	/* Accept connections. */
+	int id = 0;
+	dbg_net("tcp: created 1 master with %d workers, backend is '%s' \n",
+	        unit->size - 1, fdset_method());
+	while(1) {
+		/* Check for cancellation. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+
+		/* Accept client. */
+		int client = tcp_accept(handler->fd);
+		if (client < 0) {
+			continue;
+		}
+
+		/* Add to worker in RR fashion. */
+		if (write(workers[id]->pipe[1], &client, sizeof(int)) < 0) {
+			dbg_net("tcp: failed to register fd=%d to worker=%d\n",
+			        client, id);
+			close(client);
+			continue;
+		}
+		id = get_next_rr(id, unit->size - 1);
+	}
+
+	dbg_net("tcp: master thread finished\n");
+	free(workers);
+	
+	return KNOTD_EOK;
+}
+
+int tcp_loop_worker(dthread_t *thread)
+{
+	tcp_worker_t *w = thread->data;
+	if (!w) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Accept clients. */
+	dbg_net_verb("tcp: worker %p started\n", w);
+	for (;;) {
+
+		/* Cancellation point. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+
+		/* Wait for events. */
+		int nfds = fdset_wait(w->fdset);
+		if (nfds <= 0) {
+			continue;
+		}
+
+		/* Process incoming events. */
+		dbg_net_verb("tcp: worker %p registered %d events\n",
+		             w, nfds);
+		fdset_it_t it;
+		fdset_begin(w->fdset, &it);
+		while(1) {
+			
+			/* Handle incoming clients. */
+			if (it.fd == w->pipe[0]) {
+				int client = 0;
+				if (read(it.fd, &client, sizeof(int)) < 0) {
+					continue;
+				}
+
+				dbg_net_verb("tcp: worker %p registered "
+				             "client %d\n",
+				             w, client);
+				fdset_add(w->fdset, client, OS_EV_READ);
+			} else {
+				/* Handle other events. */
+				tcp_handle(w, it.fd);
+			}
+			
+			/* Check if next exists. */
+			if (fdset_next(w->fdset, &it) != 0) {
+				break;
+			}
+		}
+		
+	}
+
+	/* Stop whole unit. */
+	dbg_net_verb("tcp: worker %p finished\n", w);
+	tcp_worker_free(w);
+	return KNOTD_EOK;
+}
+
+int tcp_loop_unit(iohandler_t *ioh, dt_unit_t *unit)
+{
+	if (unit->size < 1) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Create unit data. */
+	tcp_worker_t **workers = malloc((unit->size - 1) *
+	                                sizeof(tcp_worker_t *));
+	if (!workers) {
+		dbg_net("tcp: cannot allocate list of workers\n");
+		return KNOTD_EINVAL;
+	}
+
+	/* Prepare worker data. */
+	unsigned allocated = 0;
+	for (unsigned i = 0; i < unit->size - 1; ++i) {
+		workers[i] = tcp_worker_create();
+		if (workers[i] == 0) {
+			break;
+		}
+		workers[i]->ioh = ioh;
+		++allocated;
+	}
+	
+	/* Check allocated workers. */
+	if (allocated != unit->size - 1) {
+		for (unsigned i = 0; i < allocated; ++i) {
+			tcp_worker_free(workers[i]);
+		}
+	
+		free(workers);
+		dbg_net("tcp: cannot create workers\n");
+		return KNOTD_EINVAL;
+	}
+	
+	/* Store worker data. */
+	ioh->data = workers;
+	
+	/* Repurpose workers. */
+	for (unsigned i = 0; i < allocated; ++i) {
+		dt_repurpose(unit->threads[i + 1], tcp_loop_worker, workers[i]);
+	}
+
+	/* Repurpose first thread as master (unit controller). */
+	dt_repurpose(unit->threads[0], tcp_loop_master, ioh);
+
+	return KNOTD_EOK;
+}
diff --git a/src/knot/server/tcp-handler.h b/src/knot/server/tcp-handler.h
new file mode 100644
index 0000000..f5fd17a
--- /dev/null
+++ b/src/knot/server/tcp-handler.h
@@ -0,0 +1,103 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file tcp-handler.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief TCP sockets threading model.
+ *
+ * The master socket distributes incoming connections among
+ * the worker threads ("buckets"). Each threads processes it's own
+ * set of sockets, and eliminates mutual exclusion problem by doing so.
+ *
+ * \todo Improve documentation of TCP pool API and use proper error codes.
+ *
+ * \addtogroup server
+ * @{
+ */
+
+#ifndef _KNOTD_TCPHANDLER_H_
+#define _KNOTD_TCPHANDLER_H_
+
+#include <stdint.h>
+
+#include "knot/server/socket.h"
+#include "knot/server/server.h"
+#include "knot/server/dthreads.h"
+
+/*!
+ * \brief Send TCP message.
+ *
+ * \param fd Associated socket.
+ * \param msg Buffer for a query wireformat.
+ * \param msglen Buffer maximum size.
+ *
+ * \retval Number of sent data on success.
+ * \retval KNOTD_ERROR on error.
+ */
+int tcp_send(int fd, uint8_t *msg, size_t msglen);
+
+/*!
+ * \brief Send TCP message.
+ *
+ * \param fd Associated socket.
+ * \param buf Buffer for incoming bytestream.
+ * \param len Buffer maximum size.
+ * \param addr Source address.
+ *
+ * \retval Number of read bytes on success.
+ * \retval KNOTD_ERROR on error.
+ * \retval KNOTD_ENOMEM on potential buffer overflow.
+ */
+int tcp_recv(int fd, uint8_t *buf, size_t len, sockaddr_t *addr);
+
+/*!
+ * \brief TCP event loop for accepting connections.
+ *
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int tcp_loop_master(dthread_t *thread);
+
+/*!
+ * \brief TCP event loop for processing requests.
+ *
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int tcp_loop_worker(dthread_t *thread);
+
+/*!
+ * \brief Create TCP event handler from threading unit.
+ *
+ * Set-up threading unit for processing TCP requests.
+ *
+ * \param ioh Associated I/O handler.
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int tcp_loop_unit(iohandler_t *ioh, dt_unit_t *unit);
+
+#endif // _KNOTD_TCPHANDLER_H_
+
+/*! @} */
diff --git a/src/knot/server/udp-handler.c b/src/knot/server/udp-handler.c
new file mode 100644
index 0000000..f7ae550
--- /dev/null
+++ b/src/knot/server/udp-handler.c
@@ -0,0 +1,438 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <sys/poll.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "common/sockaddr.h"
+#include "knot/common.h"
+#include "knot/other/error.h"
+#include "knot/server/udp-handler.h"
+#include "libknot/nameserver/name-server.h"
+#include "knot/stat/stat.h"
+#include "knot/server/server.h"
+#include "libknot/util/wire.h"
+#include "libknot/consts.h"
+#include "libknot/packet/packet.h"
+#include "knot/server/zones.h"
+#include "knot/server/notify.h"
+
+///*! \brief Wrapper for UDP send. */
+//static int xfr_send_udp(int session, sockaddr_t *addr, uint8_t *msg, size_t msglen)
+//{
+//	return sendto(session, msg, msglen, 0, addr->ptr, addr->len);
+//}
+
+int udp_handle(int fd, uint8_t *qbuf, size_t qbuflen, size_t *resp_len,
+	       sockaddr_t* addr, knot_nameserver_t *ns)
+{
+	dbg_net("udp: fd=%d received %zd bytes.\n", fd, qbuflen);
+	
+	knot_packet_type_t qtype = KNOT_QUERY_NORMAL;
+	*resp_len = SOCKET_MTU_SZ;
+
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	if (packet == NULL) {
+		dbg_net("udp: failed to create packet on fd=%d\n", fd);
+		uint16_t pkt_id = knot_wire_get_id(qbuf);
+		knot_ns_error_response(ns, pkt_id, KNOT_RCODE_SERVFAIL,
+				  qbuf, resp_len);
+		return KNOTD_EOK; /* Created error response. */
+	}
+
+	/* Parse query. */
+	int res = knot_ns_parse_packet(qbuf, qbuflen, packet, &qtype);
+	if (unlikely(res != KNOTD_EOK)) {
+		dbg_net("udp: failed to parse packet on fd=%d\n", fd);
+		/* Send error response on dnslib RCODE. */
+		if (res > 0) {
+			uint16_t pkt_id = knot_wire_get_id(qbuf);
+			knot_ns_error_response(ns, pkt_id, res,
+					  qbuf, resp_len);
+		}
+
+		knot_packet_free(&packet);
+		return KNOTD_EOK; /* Created error response. */
+	}
+
+	/* Handle query. */
+//	server_t *srv = (server_t *)knot_ns_get_data(ns);
+//	knot_ns_xfr_t xfr;
+	res = KNOTD_ERROR;
+	switch(qtype) {
+
+	/* Response types. */
+	case KNOT_RESPONSE_NORMAL:
+		res = zones_process_response(ns, addr, packet,
+					     qbuf, resp_len);
+		break;
+	case KNOT_RESPONSE_NOTIFY:
+		res = notify_process_response(ns, packet, addr,
+					      qbuf, resp_len);
+		break;
+	
+	/* Query types. */
+	case KNOT_QUERY_NORMAL:
+		res = knot_ns_answer_normal(ns, packet, qbuf,
+					      resp_len);
+		break;
+	case KNOT_QUERY_AXFR:
+		/* RFC1034, p.28 requires reliable transfer protocol.
+		 * Bind responds with FORMERR.
+ 		 */
+		/*! \todo Draft exists for AXFR/UDP, but has not been standardized. */
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_FORMERR, qbuf,
+				       resp_len);
+		res = KNOTD_EOK;
+		break;
+		
+//		/* Process AXFR over UDP. */
+//		res = xfr_request_init(&xfr, XFR_TYPE_AOUT, XFR_FLAG_UDP, packet);
+//		if (res != KNOTD_EOK) {
+//			knot_ns_error_response(ns, knot_packet_id(packet),
+//			                       KNOT_RCODE_SERVFAIL, qbuf,
+//			                       resp_len);
+//			res = KNOTD_EOK;
+//			break;
+//		}
+//		xfr.send = xfr_send_udp;
+//		xfr.session = dup(fd);
+//		memcpy(&xfr.addr, addr, sizeof(sockaddr_t));
+//		xfr_request(srv->xfr_h, &xfr);
+//		dbg_net("udp: enqueued AXFR query on fd=%d\n", xfr.session);
+//		*resp_len = 0;
+//		return KNOTD_EOK;
+	case KNOT_QUERY_IXFR:
+		/* According to RFC1035, respond with SOA. 
+		 * Draft proposes trying to fit response into one packet,
+		 * but I have found no tool or slave server to actually attempt
+		 * IXFR/UDP.
+		 */
+		knot_packet_set_qtype(packet, KNOT_RRTYPE_SOA);
+		res = knot_ns_answer_normal(ns, packet, qbuf,
+		                            resp_len);
+		break;
+//		/* Process IXFR over UDP. */
+//		res = xfr_request_init(&xfr, XFR_TYPE_IOUT, XFR_FLAG_UDP, packet);
+//		if (res != KNOTD_EOK) {
+//			knot_ns_error_response(ns, knot_packet_id(packet),
+//			                       KNOT_RCODE_SERVFAIL, qbuf,
+//			                       resp_len);
+//			res = KNOTD_EOK;
+//			break;
+//		}
+//		xfr.send = xfr_send_udp;
+//		xfr.session = dup(fd);
+//		memcpy(&xfr.addr, addr, sizeof(sockaddr_t));
+//		xfr_request(srv->xfr_h, &xfr);
+//		dbg_net("udp: enqueued IXFR query on fd=%d\n", xfr.session);
+//		*resp_len = 0;
+//		return KNOTD_EOK;
+	case KNOT_QUERY_NOTIFY:
+		res = notify_process_request(ns, packet, addr,
+					     qbuf, resp_len);
+		break;
+		
+	/*! \todo Implement query notify/update. */
+	case KNOT_QUERY_UPDATE:
+		dbg_net("udp: UPDATE query on fd=%d not implemented\n", fd);
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_NOTIMPL, qbuf,
+				       resp_len);
+		res = KNOTD_EOK;
+		break;
+		
+	/* Unhandled opcodes. */
+	case KNOT_RESPONSE_AXFR: /*!< Processed in XFR handler. */
+	case KNOT_RESPONSE_IXFR: /*!< Processed in XFR handler. */
+		knot_ns_error_response(ns, knot_packet_id(packet),
+		                       KNOT_RCODE_REFUSED, qbuf,
+		                       resp_len);
+		res = KNOTD_EOK;
+		break;
+			
+	/* Unknown opcodes */
+	default:
+		knot_ns_error_response(ns, knot_packet_id(packet),
+				       KNOT_RCODE_FORMERR, qbuf,
+				       resp_len);
+		res = KNOTD_EOK;
+		break;
+	}
+
+	knot_packet_free(&packet);
+
+	return res;
+}
+
+static inline int udp_master_recvfrom(dthread_t *thread, stat_t *thread_stat)
+{
+	iohandler_t *h = (iohandler_t *)thread->data;
+	knot_nameserver_t *ns = h->server->nameserver;
+	int sock = dup(h->fd);
+
+	sockaddr_t addr;
+	if (sockaddr_init(&addr, h->type) != KNOTD_EOK) {
+		log_server_error("Socket type %d is not supported, "
+				 "IPv6 support is probably disabled.\n",
+				 h->type);
+		return KNOTD_ENOTSUP;
+	}
+	
+	uint8_t qbuf[SOCKET_MTU_SZ];
+	struct msghdr msg;
+	memset(&msg, 0, sizeof(struct msghdr));
+	struct iovec iov;
+	memset(&iov, 0, sizeof(struct iovec));
+	iov.iov_base = qbuf;
+	iov.iov_len = SOCKET_MTU_SZ;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_name = addr.ptr;
+	msg.msg_namelen = addr.len;
+
+	/* Loop until all data is read. */
+	ssize_t n = 0;
+	while (n >= 0) {
+
+		/* Receive packet. */
+		n = recvmsg(sock, &msg, 0);
+
+		/* Cancellation point. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+
+		/* Error and interrupt handling. */
+		if (unlikely(n <= 0)) {
+			if (errno != EINTR && errno != 0) {
+				dbg_net("udp: recvmsg() failed: %d\n",
+					  errno);
+			}
+
+			if (!(h->state & ServerRunning)) {
+				break;
+			} else {
+				continue;
+			}
+		}
+
+		/* Handle received pkt. */
+		size_t resp_len = 0;
+		int rc = udp_handle(sock, qbuf, n, &resp_len, &addr, ns);
+
+		/* Send response. */
+		if (rc == KNOTD_EOK && resp_len > 0) {
+
+			dbg_net("udp: on fd=%d, sending answer size=%zd.\n",
+			        sock, resp_len);
+
+			// Send datagram
+			rc = sendto(sock, qbuf, resp_len,
+				    0, addr.ptr, addr.len);
+
+			// Check result
+			if (rc != (int)resp_len) {
+				dbg_net("udp: sendto(): failed: %d - %d.\n",
+				        rc, errno);
+			}
+		}
+	}
+
+	/* Free allocd resources. */
+	close(sock);
+
+	return KNOTD_EOK;
+}
+
+#ifdef ENABLE_RECVMMSG
+#ifdef MSG_WAITFORONE
+static inline int udp_master_recvmmsg(dthread_t *thread, stat_t *thread_stat)
+{
+	iohandler_t *h = (iohandler_t *)thread->data;
+	knot_nameserver_t *ns = h->server->nameserver;
+	int sock = dup(h->fd);
+
+	/* Allocate batch for N packets. */
+	char *iobuf = malloc(SOCKET_MTU_SZ * RECVMMSG_BATCHLEN);
+	sockaddr_t *addrs = malloc(sizeof(sockaddr_t) * RECVMMSG_BATCHLEN);
+	struct iovec *iov = malloc(sizeof(struct iovec) * RECVMMSG_BATCHLEN);
+	struct mmsghdr *msgs = malloc(sizeof(struct mmsghdr) * RECVMMSG_BATCHLEN);
+
+	/* Prepare batch. */
+	memset(msgs, 0, sizeof(struct mmsghdr) * RECVMMSG_BATCHLEN);
+	for (unsigned i = 0; i < RECVMMSG_BATCHLEN; ++i) {
+		sockaddr_init(addrs + i, h->type);
+		iov[i].iov_base = iobuf + i * SOCKET_MTU_SZ;
+		iov[i].iov_len = SOCKET_MTU_SZ;
+		msgs[i].msg_hdr.msg_iov = iov + i;
+		msgs[i].msg_hdr.msg_iovlen = 1;
+		msgs[i].msg_hdr.msg_name = addrs[i].ptr;
+		msgs[i].msg_hdr.msg_namelen = addrs[i].len;
+	}
+
+	/* Loop until all data is read. */
+	ssize_t n = 0;
+	while (n >= 0) {
+
+		/* Receive multiple messages. */
+		n = recvmmsg(sock, msgs, RECVMMSG_BATCHLEN, MSG_WAITFORONE, 0);
+
+		/* Cancellation point. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+
+		/* Error and interrupt handling. */
+		if (unlikely(n <= 0)) {
+			if (errno != EINTR && errno != 0) {
+				dbg_net("udp: recvmmsg() failed: %d\n",
+				        errno);
+			}
+
+			if (!(h->state & ServerRunning)) {
+				break;
+			} else {
+				continue;
+			}
+		}
+
+		/* Handle each received msg. */
+		int ret = 0;
+		for (unsigned i = 0; i < n; ++i) {
+			struct iovec *cvec = msgs[i].msg_hdr.msg_iov;
+			size_t resp_len = msgs[i].msg_len;
+			ret = udp_handle(sock, cvec->iov_base, resp_len, &resp_len,
+			                 addrs + i, ns);
+			if (ret == KNOTD_EOK) {
+				msgs[i].msg_len = resp_len;
+			} else {
+				msgs[i].msg_len = 0;
+			}
+			
+		}
+
+		/* Gather results. */
+		/*! \todo Implement with sendmmsg() when it's ready. */
+		for (unsigned i = 0; i < n; ++i) {
+			const size_t resp_len = msgs[i].msg_len;
+			if (resp_len > 0) {
+				dbg_net("udp: on fd=%d, sending answer size=%zd.\n",
+				        sock, resp_len);
+
+				// Send datagram
+				sockaddr_t *addr = addrs + i;
+				struct iovec *cvec = msgs[i].msg_hdr.msg_iov;
+				int res = sendto(sock, cvec->iov_base, resp_len,
+						 0, addr->ptr, addr->len);
+
+				// Check result
+				if (res != (int)resp_len) {
+					dbg_net("udp: sendto(): failed: %d - %d.\n",
+					        res, errno);
+				}
+			}
+		}
+	}
+
+	/* Free allocd resources. */
+	free(iobuf);
+	free(addrs);
+	free(iov);
+	free(msgs);
+	close(sock);
+	return KNOTD_EOK;
+}
+#endif
+#endif
+
+int udp_master(dthread_t *thread)
+{
+	iohandler_t *handler = (iohandler_t *)thread->data;
+	int sock = handler->fd;
+
+	/* Check socket. */
+	if (sock < 0) {
+		dbg_net("udp: null socket recevied, finishing.\n");
+		return KNOTD_EINVAL;
+	}
+
+	/* Set socket options. */
+	int flag = 1;
+#ifndef DISABLE_IPV6
+#
+	if (handler->type == AF_INET6) {
+		/* Disable dual-stack for performance reasons. */
+		setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag));
+
+		/* UDP packets will not exceed a minimum MTU size. */
+		/*flag = IPV6_MIN_MTU;
+		setsockopt(fd, IPPROTO_IPV6, IPV6_MTU, &flag, sizeof(flag));
+		flag = 1; */
+	}
+#endif
+	if (handler->type == AF_INET) {
+
+//#ifdef IP_PMTUDISC_DONT
+//		/* Disable fragmentation. */
+//		flag = IP_PMTUDISC_DONT;
+//		setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &flag, sizeof(flag));
+//		flag = 1;
+//#endif
+	}
+
+	/* in case of STAT_COMPILE the following code will declare thread_stat
+	 * variable in following fashion: stat_t *thread_stat;
+	 */
+
+	stat_t *thread_stat = 0;
+	STAT_INIT(thread_stat); //XXX new stat instance every time.
+	stat_set_protocol(thread_stat, stat_UDP);
+
+	/* Execute proper handler. */
+	dbg_net_verb("udp: thread started (worker %p).\n", thread);
+	int ret = KNOTD_EOK;
+
+#ifdef ENABLE_RECVMMSG
+	
+/* Check if MSG_WAITFORONE is supported. */
+#ifdef MSG_WAITFORONE
+	ret = udp_master_recvmmsg(thread, thread_stat);
+#else /* Don't have MSG_WAITFORONE */
+	ret = udp_master_recvfrom(thread, thread_stat);
+#endif
+	
+#else /* Don't have ENABLE_RECVMMSG */
+	ret = udp_master_recvfrom(thread, thread_stat);
+#endif
+
+
+	stat_free(thread_stat);
+	dbg_net_verb("udp: worker %p finished.\n", thread);
+	return ret;
+}
+
diff --git a/src/knot/server/udp-handler.h b/src/knot/server/udp-handler.h
new file mode 100644
index 0000000..f5fcd04
--- /dev/null
+++ b/src/knot/server/udp-handler.h
@@ -0,0 +1,74 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file udp-handler.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief UDP sockets threading model.
+ *
+ * The master socket locks one worker thread at a time
+ * and saves events in it's own backing store for asynchronous processing.
+ * The worker threads work asynchronously in thread pool.
+ *
+ * \addtogroup server
+ * @{
+ */
+
+#ifndef _KNOTD_UDPHANDLER_H_
+#define _KNOTD_UDPHANDLER_H_
+
+#include "knot/server/socket.h"
+#include "knot/server/server.h"
+#include "knot/server/dthreads.h"
+
+/*!
+ * \brief Handle single packet.
+ *
+ * Function processses packet and prepares answer to qbuf,
+ * response length is set to resp_len.
+ *
+ * \param sock
+ * \param qbuf
+ * \param qbuflen
+ * \param resp_len
+ * \param addr
+ * \param ns
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ERROR
+ * \retval KNOTD_ENOMEM
+ */
+int udp_handle(int sock, uint8_t *qbuf, size_t qbuflen, size_t *resp_len,
+	       sockaddr_t* addr, knot_nameserver_t *ns);
+
+/*!
+ * \brief UDP handler thread runnable.
+ *
+ * Listen to DNS datagrams in a loop on a UDP socket and
+ * reply to them. This runnable is designed to be used as coherent
+ * and implements cancellation point.
+ *
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int udp_master(dthread_t *thread);
+
+#endif
+
+/*! @} */
diff --git a/src/knot/server/xfr-handler.c b/src/knot/server/xfr-handler.c
new file mode 100644
index 0000000..45817cb
--- /dev/null
+++ b/src/knot/server/xfr-handler.c
@@ -0,0 +1,1296 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <netinet/tcp.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <assert.h>
+#include <urcu.h>
+
+#include "knot/common.h"
+#include "knot/server/xfr-handler.h"
+#include "libknot/nameserver/name-server.h"
+#include "knot/other/error.h"
+#include "knot/server/socket.h"
+#include "knot/server/udp-handler.h"
+#include "knot/server/tcp-handler.h"
+#include "libknot/updates/xfr-in.h"
+#include "knot/server/zones.h"
+#include "libknot/util/error.h"
+#include "libknot/tsig-op.h"
+#include "common/evsched.h"
+
+void xfr_interrupt(xfrhandler_t *h)
+{
+	for(unsigned i = 0; i < h->unit->size; ++i) {
+		evqueue_write(h->workers[i]->q, "", 1);
+	}
+}
+
+/*!
+ * \brief SOA query timeout handler.
+ */
+static int xfr_udp_timeout(event_t *e)
+{
+	knot_ns_xfr_t *data = (knot_ns_xfr_t *)e->data;
+	if (!data) {
+		return KNOTD_EINVAL;
+	}
+
+	sockaddr_update(&data->addr);
+	char r_addr[SOCKADDR_STRLEN];
+	sockaddr_tostr(&data->addr, r_addr, sizeof(r_addr));
+	int r_port = sockaddr_portnum(&data->addr);
+
+	/* Close socket. */
+	knot_zone_t *z = data->zone;
+	if (z && knot_zone_get_contents(z) && knot_zone_data(z)) {
+		zonedata_t *zd = (zonedata_t *)knot_zone_data(z);
+		log_zone_info("%s '%s' query to %s:%d - timeout exceeded.\n",
+		              data->type == XFR_TYPE_SOA ? "SOA" : "NOTIFY",
+		              zd->conf->name,
+		              r_addr, r_port);
+	}
+	
+	knot_ns_xfr_t cr = {};
+	cr.type = XFR_TYPE_CLOSE;
+	cr.session = data->session;
+	cr.data = data;
+	cr.zone = data->zone;
+	xfrworker_t *w = (xfrworker_t *)data->owner;
+	if (w) {
+		evqueue_write(w->q, &cr, sizeof(knot_ns_xfr_t));
+	}
+
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Query reponse event handler function.
+ *
+ * Handle single query response event.
+ *
+ * \param loop Associated event pool.
+ * \param w Associated socket watcher.
+ * \param revents Returned events.
+ */
+static int xfr_process_udp_query(xfrworker_t *w, int fd, knot_ns_xfr_t *data)
+{
+	/* Prepare msg header. */
+	struct msghdr msg;
+	memset(&msg, 0, sizeof(struct msghdr));
+	struct iovec iov;
+	memset(&iov, 0, sizeof(struct iovec));
+	iov.iov_base = data->wire;
+	iov.iov_len = data->wire_size;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_name = data->addr.ptr;
+	msg.msg_namelen = data->addr.len;
+
+	/* Receive msg. */
+	ssize_t n = recvmsg(data->session, &msg, 0);
+	size_t resp_len = data->wire_size;
+	if (n > 0) {
+		udp_handle(fd, data->wire, n, &resp_len, &data->addr, w->ns);
+	}
+
+	/* Disable timeout. */
+	evsched_t *sched =
+		((server_t *)knot_ns_get_data(w->ns))->sched;
+	event_t *ev = (event_t *)data->data;
+	if (ev) {
+		dbg_xfr("xfr: cancelling UDP query timeout\n");
+		evsched_cancel(sched, ev);
+		ev = (event_t *)data->data;
+		if (ev) {
+			evsched_event_free(sched, ev);
+			data->data = 0;
+		}
+		
+		/* Close after receiving response. */
+		knot_ns_xfr_t cr = {};
+		cr.type = XFR_TYPE_CLOSE;
+		cr.session = data->session;
+		cr.data = data;
+		cr.zone = data->zone;
+		evqueue_write(w->q, &cr, sizeof(knot_ns_xfr_t));
+	}
+	
+	return KNOTD_EOK;
+}
+
+/*! \todo Document me. */
+static void xfr_free_task(knot_ns_xfr_t *task)
+{
+	if (!task) {
+		return;
+	}
+	
+	xfrworker_t *w = (xfrworker_t *)task->owner;
+	if (!w) {
+		free(task);
+		return;
+	}
+	
+	/* Remove from fdset. */
+	if (w->fdset) {
+		dbg_xfr("xfr_free_task: freeing fd=%d.\n", task->session);
+		fdset_remove(w->fdset, task->session);
+	}
+	
+	/* Unlock if XFR/IN.*/
+	if (task->type == XFR_TYPE_AIN || task->type == XFR_TYPE_IIN) {
+		knot_zone_t *zone = task->zone;
+		zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+		if (zd) {
+			zd->xfr_in.wrkr = 0;
+			pthread_mutex_unlock(&zd->xfr_in.lock);
+		}
+	}
+
+	/* Remove fd-related data. */
+	xfrhandler_t *h = w->master;
+	pthread_mutex_lock(&h->tasks_mx);
+	skip_remove(h->tasks, (void*)((size_t)task->session), 0, 0);
+	pthread_mutex_unlock(&h->tasks_mx);
+
+	/*! \todo Free data. */
+	close(task->session);
+	free(task);
+}
+
+/*! \todo Document me. */
+static knot_ns_xfr_t *xfr_register_task(xfrworker_t *w, knot_ns_xfr_t *req)
+{
+	knot_ns_xfr_t *t = malloc(sizeof(knot_ns_xfr_t));
+	if (!t) {
+		return 0;
+	}
+
+	memcpy(t, req, sizeof(knot_ns_xfr_t));
+	sockaddr_update(&t->addr);
+
+	/* Update request. */
+	t->wire = 0; /* Invalidate shared buffer. */
+	t->wire_size = 0;
+	t->data = 0; /* New zone will be built. */
+
+	/* Register data. */
+	xfrhandler_t * h = w->master;
+	pthread_mutex_lock(&h->tasks_mx);
+	skip_insert(h->tasks, (void*)((ssize_t)t->session), t, 0);
+	pthread_mutex_unlock(&h->tasks_mx);
+
+	/* Add to set. */
+	fdset_add(w->fdset, t->session, OS_EV_READ);
+	t->owner = w;
+	return t;
+}
+
+/*!
+ * \brief Clean pending transfer data.
+ */
+static int xfr_xfrin_cleanup(xfrworker_t *w, knot_ns_xfr_t *data)
+{
+	int ret = KNOTD_EOK;
+	knot_changesets_t *chs = 0;
+	
+	switch(data->type) {
+	case XFR_TYPE_AIN:
+		if (data->data) {
+			knot_zone_contents_deep_free(
+					(knot_zone_contents_t **)&data->data, 0);
+			data->data = 0;
+		}
+		break;
+	case XFR_TYPE_IIN:
+		if (data->data) {
+			chs = (knot_changesets_t *)data->data;
+			knot_free_changesets(&chs);
+		}
+		break;
+	}
+	
+	return ret;
+}
+
+/*!
+ * \brief Finalize XFR/IN transfer.
+ *
+ * \param w XFR worker.
+ * \param data Associated data.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ERROR
+ */
+static int xfr_xfrin_finalize(xfrworker_t *w, knot_ns_xfr_t *data)
+{
+	knot_zone_t *zone = (knot_zone_t *)data->zone;
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	const char *zorigin = zd->conf->name;
+
+	/* CLEANUP */
+//	// get the zone name from Question
+//	dbg_xfr_verb("Query: %p, response: %p\n", data->query, data->response);
+//	const knot_dname_t *qname = knot_packet_qname(data->query);
+//	char *zorigin = "(unknown)";
+//	if (qname != NULL) {
+//		zorigin = knot_dname_to_str(qname);
+//	}
+	
+	int ret = KNOTD_EOK;
+	
+	switch(data->type) {
+	case XFR_TYPE_AIN:
+		dbg_xfr("xfr: AXFR/IN saving new zone\n");
+		ret = zones_save_zone(data);
+		if (ret != KNOTD_EOK) {
+			xfr_xfrin_cleanup(w, data);
+			log_zone_error("AXFR failed to save "
+			               "transferred zone '%s/IN' - %s\n",
+			               zorigin, knotd_strerror(ret));
+		} else {
+			dbg_xfr("xfr: AXFR/IN new zone saved.\n");
+			ret = knot_ns_switch_zone(w->ns, data);
+			if (ret != KNOTD_EOK) {
+				log_zone_error("AXFR failed to "
+				               "switch in-memory zone "
+				               "'%s/IN' - %s\n",
+				               zorigin,
+				               knotd_strerror(ret));
+			}
+		}
+		log_zone_info("AXFR transfer of zone '%s/IN' "
+		              "%s.\n", zorigin,
+		              ret == KNOTD_EOK ? "finished" : "failed");
+		break;
+	case XFR_TYPE_IIN:
+		/* Save changesets. */
+		dbg_xfr("xfr: IXFR/IN saving changesets\n");
+		ret = zones_store_changesets(data);
+		if (ret != KNOTD_EOK) {
+			log_zone_error("IXFR failed to save "
+			               "transferred changesets "
+			               "for zone '%s/IN' - %s\n",
+			               zorigin, knotd_strerror(ret));
+		} else {
+			/* Update zone. */
+			ret = zones_apply_changesets(data);
+			if (ret != KNOTD_EOK) {
+				log_zone_error("IXFR failed to "
+				               "apply changesets to "
+				               "zone '%s/IN' - %s\n",
+				               zorigin, 
+				               knotd_strerror(ret));
+			}
+		}
+		/* Free changesets, but not the data. */
+		knot_changesets_t *chs = (knot_changesets_t *)data->data;
+		knot_free_changesets(&chs);
+		/* CLEANUP */
+//		free(chs->sets);
+//		free(chs);
+		data->data = 0;
+		log_zone_info("IXFR transfer of zone '%s/IN' "
+		              "%s.\n", zorigin,
+		              ret == KNOTD_EOK ? "finished" : "failed");
+		break;
+	default:
+		ret = KNOTD_EINVAL;
+		break;
+	}
+
+	/* CLEANUP */
+//	if (qname != NULL) {
+//		free(zorigin);
+//	}
+	
+	return ret;
+}
+
+/*!
+ * \brief Prepare TSIG for XFR.
+ */
+static int xfr_prepare_tsig(knot_ns_xfr_t *xfr, knot_key_t *key)
+{
+	int ret = KNOT_EOK;
+	xfr->tsig_key = 0; /*key;*/ /*!< \todo [TSIG] DISABLED */
+//	xfr->tsig_size = tsig_wire_maxsize(key);
+//	xfr->digest_max_size = tsig_alg_digest_length(
+//				key->algorithm);
+//	xfr->digest = malloc(xfr->digest_max_size);
+//	memset(xfr->digest, 0 , xfr->digest_max_size);
+//	dbg_xfr("xfr: found TSIG key (MAC len=%zu), adding to transfer\n",
+//		xfr->digest_max_size);
+	
+	return ret;
+}
+
+/*!
+ * \brief Check TSIG if exists.
+ */
+static int xfr_check_tsig(knot_ns_xfr_t *xfr, knot_rcode_t *rcode)
+{
+	/*!< \todo [TSIG] DISABLED */
+	return knot_packet_parse_rest(xfr->query);
+	
+//	/* Parse rest of the packet. */
+//	int ret = KNOT_EOK;
+//	knot_packet_t *qry = xfr->query;
+//	knot_key_t *key = 0;
+//	const knot_rrset_t *tsig_rr = 0;
+//	ret = knot_packet_parse_rest(qry);
+//	if (ret == KNOT_EOK) {
+		
+//		/* Find TSIG key name from query. */
+//		const knot_dname_t* kname = 0;
+//		int tsig_pos = knot_packet_additional_rrset_count(qry) - 1;
+//		if (tsig_pos >= 0) {
+//			tsig_rr = knot_packet_additional_rrset(qry, tsig_pos);
+//			if (knot_rrset_type(tsig_rr) == KNOT_RRTYPE_TSIG) {
+//				dbg_xfr("xfr: found TSIG in AR\n");
+//				kname = knot_rrset_owner(tsig_rr);
+//				ret = KNOT_TSIG_EBADKEY;
+//			}
+//		}
+//		if (!kname) {
+//			dbg_xfr("xfr: TSIG not found in AR\n");
+//		}
+
+//		/* Find configured key for claimed key name. */
+//		conf_key_t *ck = 0;
+//		WALK_LIST(ck, conf()->keys) {
+//			if (!kname) {
+//				break;
+//			}
+//			/* Compare stored keys to claimed. */
+//			if (knot_dname_compare(ck->k.name,
+//					       kname) == 0) {
+//				dbg_xfr("xfr: found claimed "
+//					"TSIG key for "
+//					"comparison\n");
+//				key = &ck->k;
+//				break;
+//			}
+//		}
+
+//		/* Validate with TSIG. */
+//		if (key) {
+//			/* Prepare variables for TSIG */
+//			xfr_prepare_tsig(xfr, key);
+			
+//			/* Copy MAC from query. */
+//			dbg_xfr("xfr: validating TSIG from query\n");
+//			const uint8_t* mac = tsig_rdata_mac(tsig_rr);
+//			size_t mac_len = tsig_rdata_mac_length(tsig_rr);
+//			if (mac_len > xfr->digest_max_size) {
+//				ret = KNOT_EMALF;
+//				dbg_xfr("xfr: MAC length %zu exceeds digest "
+//					"maximum size %zu\n",
+//					mac_len, xfr->digest_max_size);
+//			} else {
+//				memcpy(xfr->digest, mac, mac_len);
+//				xfr->digest_size = mac_len;
+				
+//				/* Check query TSIG. */
+//				ret = knot_tsig_server_check(
+//						tsig_rr,
+//						knot_packet_wireformat(qry),
+//						knot_packet_size(qry),
+//						key);
+//				dbg_xfr("knot_tsig_server_check() returned %s\n",
+//					knot_strerror(ret));
+//			}
+			
+//			/* Evaluate TSIG check results. */
+//			switch(ret) {
+//			case KNOT_EOK:
+//				*rcode = KNOT_RCODE_NOERROR;
+//				break;
+//			case KNOT_TSIG_EBADKEY:
+//			case KNOT_TSIG_EBADSIG:
+//				// delete the TSIG key so that the error
+//				// response is not signed
+//				xfr->tsig_key = NULL;
+//			case KNOT_TSIG_EBADTIME:
+//				/*! \note [TSIG] Set TSIG rcode in TSIG RR. */
+				
+//				*rcode = KNOT_RCODE_NOTAUTH; 
+//				break;
+//			case KNOT_EMALF:
+//				*rcode = KNOT_RCODE_FORMERR;
+//				break;
+//			default:
+//				*rcode = KNOT_RCODE_SERVFAIL;
+//			}
+//		} else {
+//			dbg_xfr("xfr: no claimed key configured, "
+//				"treating as bad key\n");
+//		}
+//	} else {
+//		dbg_xfr("xfr: failed to parse rest of the packet\n");
+//		*rcode = KNOT_RCODE_FORMERR;
+//	}
+	
+//	return ret;
+}
+
+/*!
+ * \brief XFR-IN event handler function.
+ *
+ * Handle single XFR client event.
+ *
+ * \param w Associated XFR worker.
+ * \param fd Associated file descriptor.
+ * \param data Transfer data.
+ */
+int xfr_process_event(xfrworker_t *w, int fd, knot_ns_xfr_t *data)
+{
+	/* Buffer for answering. */
+	uint8_t buf[65535];
+
+	/* Update xfer state. */
+	data->wire = buf;
+	data->wire_size = sizeof(buf);
+
+	/* Handle SOA/NOTIFY responses. */
+	if (data->type == XFR_TYPE_NOTIFY || data->type == XFR_TYPE_SOA) {
+		return xfr_process_udp_query(w, fd, data);
+	}
+
+	/* Read DNS/TCP packet. */
+	int ret = 0;
+	int rcvd = tcp_recv(fd, buf, sizeof(buf), 0);
+	data->wire_size = rcvd;
+	if (rcvd <= 0) {
+		data->wire_size = 0;
+		ret = KNOT_ECONN;
+	} else {
+
+	/*!
+	 * \todo [TSIG] Somewhere before this fetch the query digest and the TSIG
+	 *       associated with this transfer and save them to 'data'.
+	 */
+
+		/* Process incoming packet. */
+		switch(data->type) {
+		case XFR_TYPE_AIN:
+			ret = knot_ns_process_axfrin(w->ns, data);
+			break;
+		case XFR_TYPE_IIN:
+			ret = knot_ns_process_ixfrin(w->ns, data);
+			break;
+		default:
+			ret = KNOT_EBADARG;
+			break;
+		}
+	}
+
+	/* AXFR-style IXFR. */
+	if (ret == KNOT_ENOIXFR) {
+		dbg_xfr("xfr: Fallback to AXFR/IN.\n");
+		assert(data->type == XFR_TYPE_IIN);
+		data->type = XFR_TYPE_AIN;
+		ret = knot_ns_process_axfrin(w->ns, data);
+	}
+
+	/* Check return code for errors. */
+	dbg_xfr_verb("xfr: processed incoming XFR packet (res =  %d)\n", ret);
+	
+	/* Finished xfers. */
+	int xfer_finished = 0;
+	if (ret != KNOT_EOK) {
+		xfer_finished = 1;
+	}
+	
+	/* IXFR refused, try again with AXFR. */
+	knot_zone_t *zone = (knot_zone_t *)data->zone;
+	if (zone && data->type == XFR_TYPE_IIN && ret == KNOT_EXFRREFUSED) {
+		log_server_notice("IXFR/IN failed, attempting to use "
+				  "AXFR/IN instead.\n");
+		size_t bufsize = sizeof(buf);
+		data->wire_size = sizeof(buf); /* Reset maximum bufsize */
+		ret = xfrin_create_axfr_query(zone->name, data,
+					      &bufsize, 1);
+		/* Send AXFR/IN query. */
+		if (ret == KNOTD_EOK) {
+			ret = data->send(data->session, &data->addr,
+					 data->wire, bufsize);
+			/* Switch to AIN type XFR and return now. */
+			if (ret == bufsize) {
+				data->type = XFR_TYPE_AIN;
+				return KNOTD_EOK;
+			}
+		}
+	}
+
+	/* Handle errors. */
+	if (ret < 0 && ret != KNOT_ENOXFR) {
+		log_server_error("%cXFR/IN request failed - %s\n",
+		                 data->type == XFR_TYPE_AIN ? 'A' : 'I',
+		                 knot_strerror(ret));
+	}
+
+	/* Check finished zone. */
+	if (xfer_finished) {
+		
+		knot_zone_t *zone = (knot_zone_t *)data->zone;
+		zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+		const char *zorigin = zd->conf->name;
+
+		/* Only for successful xfers. */
+		if (ret > 0) {
+			ret = xfr_xfrin_finalize(w, data);
+			
+			/* AXFR bootstrap timeout. */
+			rcu_read_lock();
+			if (!knot_zone_contents(zone) && data->type == XFR_TYPE_AIN) {
+				/* Schedule request (60 - 90s random delay). */
+				int tmr_s = AXFR_BOOTSTRAP_RETRY;
+				tmr_s += (30.0 * 1000) * (rand() / (RAND_MAX + 1.0));
+				zd->xfr_in.bootstrap_retry = tmr_s;
+				log_zone_info("Another attempt to AXFR bootstrap "
+				              "zone '%s' in %d seconds.\n",
+				              zorigin, tmr_s/1000);
+			}
+			rcu_read_unlock();
+			
+			/* Update timers. */
+			server_t *server = (server_t *)knot_ns_get_data(w->ns);
+			zones_timers_update(zone, zd->conf, server->sched);
+			
+		} else {
+			/* Cleanup */
+			xfr_xfrin_cleanup(w, data);
+		}
+		
+		/* Free TSIG buffers. */
+		if (data->digest) {
+			free(data->digest);
+			data->digest = 0;
+			data->digest_size = 0;
+		}
+		if (data->tsig_data) {
+			free(data->tsig_data);
+			data->tsig_data = 0;
+			data->tsig_data_size = 0;
+		}
+		
+		/* Disconnect. */
+		ret = KNOTD_ECONNREFUSED; /* Make it disconnect. */
+	} else {
+		ret = KNOTD_EOK;
+	}
+
+	return ret;
+}
+
+/*! \todo Document me.
+ */
+static int xfr_client_start(xfrworker_t *w, knot_ns_xfr_t *data)
+{
+	/* Fetch associated zone. */
+	knot_zone_t *zone = (knot_zone_t *)data->zone;
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Check if not already processing. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (!zd) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Enqueue to worker that has zone locked for XFR/IN. */
+	int ret = pthread_mutex_trylock(&zd->xfr_in.lock);
+	if (ret != 0) {
+		dbg_xfr_verb("xfr: XFR/IN switching to another thread, "
+		             "zone '%s' is already in transfer\n",
+		             zd->conf->name);
+		xfrworker_t *nextw = (xfrworker_t *)zd->xfr_in.wrkr;
+		if (nextw == 0) {
+			nextw = w;
+		}
+		evqueue_write(nextw->q, data, sizeof(knot_ns_xfr_t));
+		return KNOTD_EOK;
+	} else {
+		zd->xfr_in.wrkr = w;
+	}
+
+	/* Update address. */
+	sockaddr_update(&data->addr);
+	char r_addr[SOCKADDR_STRLEN];
+	sockaddr_tostr(&data->addr, r_addr, sizeof(r_addr));
+	int r_port = sockaddr_portnum(&data->addr);
+
+	/* Connect to remote. */
+	if (data->session <= 0) {
+		int fd = socket_create(data->addr.family, SOCK_STREAM);
+		if (fd < 0) {
+			log_server_warning("Failed to create socket "
+					   "(type=%s, family=%s).\n",
+					   "SOCK_STREAM",
+					   data->addr.family == AF_INET ?
+					   "AF_INET" : "AF_INET6");
+			return KNOTD_ERROR;
+		}
+		ret = connect(fd, data->addr.ptr, data->addr.len);
+		if (ret < 0) {
+			log_server_warning("Failed to connect to %cXFR master "
+					   "at %s:%d.\n",
+					   data->type == XFR_TYPE_AIN ? 'A' : 'I',
+					   r_addr, r_port);
+			if (!knot_zone_contents(zone)) {
+				/* Reschedule request (120 - 240s random delay). */
+				int tmr_s = AXFR_BOOTSTRAP_RETRY * 2; /* Malus x2 */
+				tmr_s += (int)((120.0 * 1000) * 
+				               (rand() / (RAND_MAX + 1.0)));
+				event_t *ev = zd->xfr_in.timer;
+				if (ev) {
+					evsched_cancel(ev->parent, ev);
+					evsched_schedule(ev->parent, ev, tmr_s);
+				}
+				log_zone_notice("Zone AXFR bootstrap failed, "
+				                "another attempt in %d seconds."
+				                "\n", tmr_s / 1000);
+			}
+			return KNOTD_ERROR;
+		}
+
+		/* Store new socket descriptor. */
+		data->session = fd;
+	} else {
+		/* Duplicate existing socket descriptor. */
+		data->session = dup(data->session);
+	}
+
+	/* Fetch zone contents. */
+	rcu_read_lock();
+	const knot_zone_contents_t *contents = knot_zone_contents(zone);
+	if (!contents && data->type == XFR_TYPE_IIN) {
+		rcu_read_unlock();
+		log_server_warning("Failed start IXFR on zone with no "
+				   "contents\n");
+		return KNOTD_ERROR;
+	}
+	
+	/*! \todo [TSIG] Somewhere before this determine if the server should
+	 *               use TSIG for this transfer and set appropriate fields
+	 *               in 'data'.
+	 */
+	int add_tsig = 0;
+	if (data->tsig_key) {
+		if (xfr_prepare_tsig(data, data->tsig_key) == KNOT_EOK) {
+			size_t data_bufsize = KNOT_NS_TSIG_DATA_MAX_SIZE;
+			data->tsig_data = malloc(data_bufsize);
+			if (data->tsig_data) {
+				dbg_xfr("xfr: using TSIG for XFR/IN\n");
+				add_tsig = 1;
+				data->tsig_data_size = data_bufsize;
+			} else {
+				dbg_xfr("xfr: failed to allocate TSIG data "
+					"buffer (%zu kB)\n",
+					data_bufsize / 1024);
+			}
+		}
+	}
+
+	/* Create XFR query. */
+	size_t bufsize = data->wire_size;
+	switch(data->type) {
+	case XFR_TYPE_AIN:
+		ret = xfrin_create_axfr_query(zone->name, data, &bufsize, add_tsig);
+		break;
+	case XFR_TYPE_IIN:
+		ret = xfrin_create_ixfr_query(contents, data, &bufsize, add_tsig);
+		break;
+	default:
+		ret = KNOTD_EINVAL;
+		break;
+	}
+
+	/* Handle errors. */
+	if (ret != KNOT_EOK) {
+		dbg_xfr("xfr: failed to create XFR query type %d: %s\n",
+		        data->type, knot_strerror(ret));
+		return ret;
+	}
+
+	/* Unlock zone contents. */
+	rcu_read_unlock();
+	
+	/* Add to pending transfers. */
+	knot_ns_xfr_t *task = xfr_register_task(w, data);
+	
+	ret = data->send(data->session, &data->addr, data->wire, bufsize);
+	if (ret != bufsize) {
+		log_server_notice("Failed to send %cXFR query.",
+		                  data->type == XFR_TYPE_AIN ? 'A' : 'I');
+		xfr_free_task(task);
+		return KNOTD_ERROR;
+	}
+	
+	/* Send XFR query. */
+	log_server_info("%cXFR transfer of zone '%s/IN' with %s:%d started.\n",
+			data->type == XFR_TYPE_AIN ? 'A' : 'I',
+	                zd->conf->name,
+			r_addr, r_port);
+
+	return KNOTD_EOK;
+}
+
+static int xfr_fd_compare(void *k1, void *k2)
+{
+	if (k1 < k2) {
+		return -1;
+	}
+	
+	if (k1 > k2) {
+		return 1;
+	}
+	
+	return 0;
+}
+
+/*
+ * Public APIs.
+ */
+
+static xfrworker_t* xfr_worker_create(xfrhandler_t *h, knot_nameserver_t *ns)
+{
+	xfrworker_t *w = malloc(sizeof(xfrworker_t));
+	if(!w) {
+		return 0;
+	}
+	
+	/* Set nameserver and master. */
+	w->ns = ns;
+	w->master = h;
+	
+	/* Create event queue. */
+	w->q = evqueue_new();
+	if (!w->q) {
+		free(w);
+		return 0;
+	}
+	
+	/* Create fdset. */
+	w->fdset = fdset_new();
+	if (!w->fdset) {
+		evqueue_free(&w->q);
+		free(w);
+		return 0;
+	}
+	
+	/* Add evqueue to fdset. */
+	fdset_add(w->fdset, evqueue_pollfd(w->q), OS_EV_READ);
+	
+	return w;
+}
+
+static void xfr_worker_free(xfrworker_t *w) {
+	if (w) {
+		evqueue_free(&w->q);
+		fdset_destroy(w->fdset);
+		free(w);
+	}
+}
+
+xfrhandler_t *xfr_create(size_t thrcount, knot_nameserver_t *ns)
+{
+	/* Create XFR handler data. */
+	xfrhandler_t *data = malloc(sizeof(xfrhandler_t));
+	if (!data) {
+		return 0;
+	}
+	memset(data, 0, sizeof(xfrhandler_t));
+	
+	/* Create RR mutex. */
+	pthread_mutex_init(&data->rr_mx, 0);
+
+	/* Create tasks structure and mutex. */
+	pthread_mutex_init(&data->tasks_mx, 0);
+	data->tasks = skip_create_list(xfr_fd_compare);
+	
+	/* Initialize threads. */
+	data->workers = malloc(thrcount * sizeof(xfrhandler_t*));
+	if(data->workers == 0) {
+		pthread_mutex_destroy(&data->rr_mx);
+		free(data);
+	}
+	
+	/* Create threading unit. */
+	dt_unit_t *unit = dt_create(thrcount);
+	if (!unit) {
+		pthread_mutex_destroy(&data->rr_mx);
+		free(data->workers);
+		free(data);
+		return 0;
+	}
+	data->unit = unit;
+	
+	/* Create worker threads. */
+	unsigned initialized = 0;
+	for (unsigned i = 0; i < thrcount; ++i) {
+		data->workers[i] = xfr_worker_create(data, ns);
+		if(data->workers[i] == 0) {
+			break;
+		}
+		++initialized;
+	}
+	
+	/* Check for initialized. */
+	if (initialized != thrcount) {
+		for (unsigned i = 0; i < initialized; ++i) {
+			xfr_worker_free(data->workers[i]);
+		}
+		pthread_mutex_destroy(&data->rr_mx);
+		free(data->workers);
+		free(data->unit);
+		free(data);
+		return 0;
+	}
+	
+	/* Assign worker threads. */
+	for (unsigned i = 0; i < thrcount; ++i) {
+		dt_repurpose(unit->threads[i], xfr_worker, data->workers[i]);
+	}
+	
+	data->interrupt = xfr_interrupt;
+
+	return data;
+}
+
+int xfr_free(xfrhandler_t *handler)
+{
+	if (!handler) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Free RR mutex. */
+	pthread_mutex_destroy(&handler->rr_mx);
+
+	/* Free tasks and mutex. */
+	skip_destroy_list(&handler->tasks, 0,
+	                  (void(*)(void*))xfr_free_task);
+	pthread_mutex_destroy(&handler->tasks_mx);
+	
+	/* Free workers. */
+	for (unsigned i = 0; i < handler->unit->size; ++i) {
+		xfr_worker_free(handler->workers[i]);
+	}
+	free(handler->workers);
+
+	/* Delete unit. */
+	dt_delete(&handler->unit);
+	free(handler);
+
+	return KNOTD_EOK;
+}
+
+int xfr_stop(xfrhandler_t *handler)
+{
+	/* Break loop. */
+	dt_stop(handler->unit);
+	return KNOTD_EOK;
+}
+
+int xfr_join(xfrhandler_t *handler) {
+	return dt_join(handler->unit);
+}
+
+int xfr_request_init(knot_ns_xfr_t *r, int type, int flags, knot_packet_t *pkt)
+{
+	if (!r || type < 0 || flags < 0) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Blank and init. */
+	memset(r, 0, sizeof(knot_ns_xfr_t));
+	r->type = type;
+	r->flags = flags;
+	
+	/* Copy packet if applicable. */
+	if (pkt != 0) {
+		uint8_t *wire_copy = malloc(sizeof(uint8_t) * pkt->size);
+		if (!wire_copy) {
+			ERR_ALLOC_FAILED;
+			return KNOTD_ENOMEM;
+		}
+		memcpy(wire_copy, pkt->wireformat, pkt->size);
+		pkt->wireformat = wire_copy;
+		r->query = pkt;
+	}
+	
+	return KNOTD_EOK;
+}
+
+int xfr_request(xfrhandler_t *handler, knot_ns_xfr_t *req)
+{
+	if (!handler || !req) {
+		return KNOTD_EINVAL;
+	}
+	
+	/* Get next worker in RR fashion */
+	pthread_mutex_lock(&handler->rr_mx);
+	evqueue_t *q = handler->workers[handler->rr]->q;
+	handler->rr = get_next_rr(handler->rr, handler->unit->size);
+	pthread_mutex_unlock(&handler->rr_mx);
+
+	/* Delegate request. */
+	int ret = evqueue_write(q, req, sizeof(knot_ns_xfr_t));
+	if (ret < 0) {
+		return KNOTD_ERROR;
+	}
+
+	return KNOTD_EOK;
+}
+
+static int xfr_process_request(xfrworker_t *w, uint8_t *buf, size_t buflen)
+{
+	/* Read single request. */
+	knot_ns_xfr_t xfr = {};
+	int ret = evqueue_read(w->q, &xfr, sizeof(knot_ns_xfr_t));
+	if (ret != sizeof(knot_ns_xfr_t)) {		
+		dbg_xfr_verb("xfr: evqueue_read() returned %d.\n", ret);
+		return KNOTD_ENOTRUNNING;
+	}
+
+	/* Update request. */
+	sockaddr_update(&xfr.addr);
+	xfr.wire = buf;
+	xfr.wire_size = buflen;
+	char r_addr[SOCKADDR_STRLEN];
+	sockaddr_tostr(&xfr.addr, r_addr, sizeof(r_addr));
+	int r_port = sockaddr_portnum(&xfr.addr);
+
+	conf_read_lock();
+
+	/* Handle request. */
+	knot_ns_xfr_t *task = 0;
+	evsched_t *sch = 0;
+	const char *req_type = "";
+	knot_rcode_t rcode = 0;
+	char *zname = "(unknown)";
+
+	/* XFR request state tracking. */
+	int init_failed = 0;
+	const char *errstr = "";
+	const knot_dname_t *qname = NULL;
+	
+	dbg_xfr_verb("Query ptr: %p\n", xfr.query);
+
+	dbg_xfr_verb("xfr: processing request type '%d'\n", xfr.type);
+	switch(xfr.type) {
+	case XFR_TYPE_AOUT:
+		req_type = "AXFR/OUT";
+		ret = knot_ns_init_xfr(w->ns, &xfr);
+		init_failed = (ret != KNOT_EOK);
+		errstr = knot_strerror(ret);
+
+		// use the QNAME as the zone name to get names also for
+		// zones that are not in the server
+		qname = knot_packet_qname(xfr.query);
+		if (qname != NULL) {
+			zname = knot_dname_to_str(qname);
+		}
+
+		/* Check requested zone. */
+		if (!init_failed) {
+			ret = zones_xfr_check_zone(&xfr, &rcode);
+			init_failed = (ret != KNOTD_EOK);
+			errstr = knotd_strerror(ret);
+		}
+
+		/* Check TSIG. */
+		if (!init_failed) {
+			ret = xfr_check_tsig(&xfr, &rcode);
+			init_failed = (ret != KNOT_EOK);
+			errstr = knot_strerror(ret);
+		}
+
+		/* Evaluate progress and answer if passed. */
+		if (init_failed) {
+			knot_ns_xfr_send_error(w->ns, &xfr, rcode);
+			socket_close(xfr.session);
+			log_server_notice("AXFR transfer of zone '%s/OUT' "
+			                  "%s:%d failed: %s\n",
+			                  zname,
+			                  r_addr, r_port,
+			                  errstr);
+		} else {
+			ret = knot_ns_answer_axfr(w->ns, &xfr);
+			dbg_xfr("xfr: ns_answer_axfr() = %d.\n", ret);
+			if (ret != KNOTD_EOK) {
+				socket_close(xfr.session);
+			} else {
+				log_server_info("AXFR transfer of zone '%s/OUT' "
+				                "to %s:%d successful.\n",
+				                zname,
+				                r_addr, r_port);
+			}
+		}
+		
+		if (xfr.digest) {
+			free(xfr.digest);
+			xfr.digest_max_size = 0;
+			xfr.digest = 0;
+		}
+		free(xfr.query->wireformat);
+		xfr.query->wireformat = 0;
+		knot_packet_free(&xfr.query); /* Free query. */
+		
+		if (qname != NULL) {
+			free(zname);
+		}
+		
+		break;
+	case XFR_TYPE_IOUT:
+		req_type = "IXFR/OUT";
+		ret = knot_ns_init_xfr(w->ns, &xfr);
+		init_failed = (ret != KNOT_EOK);
+		errstr = knot_strerror(ret);
+
+		qname = knot_packet_qname(xfr.query);
+		if (qname != NULL) {
+			zname = knot_dname_to_str(qname);
+		}
+		
+		/* Check requested zone. */
+		if (!init_failed) {
+			ret = zones_xfr_check_zone(&xfr, &rcode);
+			init_failed = (ret != KNOTD_EOK);
+			errstr = knotd_strerror(ret);
+		}
+
+		/* Check TSIG. */
+		if (!init_failed) {
+			ret = xfr_check_tsig(&xfr, &rcode);
+			init_failed = (ret != KNOT_EOK);
+			errstr = knot_strerror(ret);
+		}
+		
+		uint32_t serial_from = 0;
+		uint32_t serial_to = 0;
+		
+		// Check serial differeces
+		if (!init_failed) {
+			dbg_xfr_verb("Loading serials for IXFR.\n");
+			ret = ns_ixfr_load_serials(&xfr, &serial_from, 
+			                           &serial_to);
+			dbg_xfr_detail("Loaded serials: from: %u, to: %u\n",
+			               serial_from, serial_to);
+			init_failed = (ret != KNOT_EOK);
+			errstr = knot_strerror(ret);
+		}
+		
+		/* Load changesets from journal. */
+		if (!init_failed) {
+			dbg_xfr_verb("Loading changesets from journal.\n");
+			ret = zones_xfr_load_changesets(&xfr, serial_from, 
+			                                serial_to);
+			if (ret != KNOTD_EOK) {
+				/* History cannot be reconstructed, fallback to AXFR. */
+				if (ret == KNOTD_ERANGE || ret == KNOTD_ENOENT) {
+					log_server_info("IXFR transfer of zone '%s/OUT'"
+					                " - failed to load data from journal: %s."
+					                " Fallback to AXFR.\n",
+					                knotd_strerror(ret), zname);
+					xfr.type = XFR_TYPE_AOUT;
+					xfr_request(w->master, &xfr);
+					conf_read_unlock();
+					return KNOTD_EOK;
+				} else if (ret == KNOTD_EMALF) {
+					rcode = KNOT_RCODE_FORMERR;
+				} else {
+					rcode = KNOT_RCODE_SERVFAIL;
+				}
+				init_failed = (ret != KNOTD_EOK);
+				errstr = knotd_strerror(ret);
+			}
+		}
+		
+		/* Evaluate progress and answer if passed. */
+		if (init_failed) {
+			knot_ns_xfr_send_error(w->ns, &xfr, rcode);
+			log_server_notice("IXFR transfer of zone '%s/OUT' "
+			                  "%s:%d failed: %s\n",
+			                  zname,
+			                  r_addr, r_port,
+			                  errstr);
+			ret = KNOTD_ERROR;
+		} else {
+			ret = knot_ns_answer_ixfr(w->ns, &xfr);
+			dbg_xfr("xfr: ns_answer_ixfr() = %d.\n", ret);
+			if (ret != KNOTD_EOK) {
+				socket_close(xfr.session);
+			} else {
+				log_server_info("IXFR transfer of zone '%s/OUT'"
+						" - not enough data in journal,"
+						" fallback to AXFR.\n",
+						zname);
+				xfr.type = XFR_TYPE_AOUT;
+				xfr_request(w->master, &xfr);
+				return KNOTD_EOK;
+			}
+		}
+		if (xfr.digest) {
+			free(xfr.digest);
+			xfr.digest = 0;
+			xfr.digest_max_size = 0;
+		}
+		free(xfr.query->wireformat);
+		knot_packet_free(&xfr.query); /* Free query. */
+		
+		if (qname) {
+			free(zname);
+		}
+		
+		break;
+	case XFR_TYPE_AIN:
+		req_type = "AXFR/IN";
+	case XFR_TYPE_IIN:
+		if (xfr.type == XFR_TYPE_IIN) {
+			req_type = "IXFR/IN";
+		}
+		
+		ret = xfr_client_start(w, &xfr);
+		
+		/* Report. */
+		if (ret != KNOTD_EOK && ret != KNOTD_EACCES) {
+			log_server_error("%s request from %s:%d failed: %s\n",
+			                 req_type, r_addr, r_port,
+			                 knotd_strerror(ret));
+		}
+		break;
+	case XFR_TYPE_SOA:
+	case XFR_TYPE_NOTIFY:
+		/* Register task. */
+		task = xfr_register_task(w, &xfr);
+		if (!task) {
+			ret = KNOTD_ENOMEM;
+			break;
+		}
+
+		req_type = "SOA or NOTIFY";
+		dbg_xfr("xfr: waiting for %s query response\n",
+			  xfr.type == XFR_TYPE_SOA ? "SOA" : "NOTIFY");
+
+		/* Add timeout. */
+		sch = ((server_t *)knot_ns_get_data(w->ns))->sched;
+		task->data = evsched_schedule_cb(sch, xfr_udp_timeout,
+						 task, SOA_QRY_TIMEOUT);
+		ret = KNOTD_EOK;
+		break;
+	/* Socket close event. */
+	case XFR_TYPE_CLOSE:
+		xfr_free_task((knot_ns_xfr_t *)xfr.data);
+		ret = KNOTD_EOK;
+	default:
+		break;
+	}
+
+	conf_read_unlock();
+	
+	return ret;
+}
+
+int xfr_worker(dthread_t *thread)
+{
+	xfrworker_t *w = (xfrworker_t *)thread->data;	
+
+	/* Check data. */
+	if (w < 0) {
+		dbg_xfr("xfr: NULL worker data, worker cancelled\n");
+		return KNOTD_EINVAL;
+	}
+
+	/* Buffer for answering. */
+	uint8_t buf[65535];
+
+	/* Accept requests. */
+	int ret = 0;
+	dbg_xfr_verb("xfr: worker=%p starting\n", w);
+	for (;;) {
+		
+		/* Check for cancellation. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+		
+		/* Poll fdset. */
+		int nfds = fdset_wait(w->fdset);
+		if (nfds <= 0) {
+			continue;
+		}
+		
+		/* Check for cancellation. */
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+		
+		/* Iterate fdset. */
+		xfrhandler_t *h = w->master;
+		knot_ns_xfr_t *data = 0;
+		int rfd = evqueue_pollfd(w->q);
+		fdset_it_t it;
+		fdset_begin(w->fdset, &it);
+		while(1) {
+			
+			/* Check if it request. */
+			if (it.fd == rfd) {
+				dbg_xfr_verb("xfr: worker=%p processing request\n",
+				             w);
+				ret = xfr_process_request(w, buf, sizeof(buf));
+				if (ret == KNOTD_ENOTRUNNING) {
+					break;
+				}
+			} else {
+				/* Find data. */
+				pthread_mutex_lock(&h->tasks_mx);
+				data = skip_find(h->tasks, (void*)((size_t)it.fd));
+				pthread_mutex_unlock(&h->tasks_mx);
+				dbg_xfr_verb("xfr: worker=%p processing event on "
+				             "fd=%d data=%p.\n",
+				             w, it.fd, data);
+				ret = xfr_process_event(w, it.fd, data);
+				if (ret != KNOTD_EOK) {
+					xfr_free_task(data);
+				}
+			}
+			
+			/* Next fd. */
+			if (fdset_next(w->fdset, &it) < 0) {
+				break;
+			}
+		}
+	}
+
+
+	/* Stop whole unit. */
+	dbg_xfr_verb("xfr: worker=%p finished.\n", w);
+	thread->data = 0;
+	return KNOTD_EOK;
+}
diff --git a/src/knot/server/xfr-handler.h b/src/knot/server/xfr-handler.h
new file mode 100644
index 0000000..3587d93
--- /dev/null
+++ b/src/knot/server/xfr-handler.h
@@ -0,0 +1,163 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file xfr-handler.h
+ *
+ * \author Marek Vavrusa <marek.vavusa@nic.cz>
+ *
+ * \brief XFR requests handler.
+ *
+ * \addtogroup server
+ * @{
+ */
+
+#ifndef _KNOTD_XFRHANDLER_H_
+#define _KNOTD_XFRHANDLER_H_
+
+#include "knot/server/dthreads.h"
+#include "libknot/nameserver/name-server.h"
+#include "common/evqueue.h"
+#include "common/fdset.h"
+#include "common/skip-list.h" /*!< \todo Consider another data struct. */
+
+struct xfrhandler_t;
+
+/*!
+ * \brief XFR worker structure.
+ */
+typedef struct xfrworker_t
+{
+	knot_nameserver_t *ns;  /*!< \brief Pointer to nameserver.*/
+	evqueue_t          *q;  /*!< \brief Shared XFR requests queue.*/
+	fdset_t        *fdset; /*!< \brief File descriptor set. */
+	struct xfrhandler_t *master; /*! \brief Worker master. */
+} xfrworker_t;
+
+/*!
+ * \brief XFR handler structure.
+ */
+typedef struct xfrhandler_t
+{
+	dt_unit_t       *unit;  /*!< \brief Threading unit. */
+	xfrworker_t **workers;  /*!< \brief Workers. */
+	skip_list_t *tasks; /*!< \brief Pending tasks. */
+	pthread_mutex_t tasks_mx; /*!< \brief Tasks synchronisation. */
+	void (*interrupt)(struct xfrhandler_t *h); /*!< Interrupt handler. */
+	unsigned rr; /*!< \brief Round-Robin counter. */
+	pthread_mutex_t rr_mx; /*!< \brief RR mutex. */
+} xfrhandler_t;
+
+/*!
+ * \brief Create XFR threading unit.
+ *
+ * Unit can be controlled by standard DThreads API.
+ * Unit is created in Idle mode.
+ *
+ * \param thrcount Requested number of threads.
+ * \param ns Pointer to nameserver.
+ *
+ * \retval New handler on success.
+ * \retval NULL on error.
+ */
+xfrhandler_t *xfr_create(size_t thrcount, knot_nameserver_t *ns);
+
+/*!
+ * \brief Delete XFR handler.
+ *
+ * \warning Threading unit must be stopped and joined.
+ *
+ * \param handler XFR handler.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on NULL handler.
+ * \retval KNOTD_ERROR on error.
+ */
+int xfr_free(xfrhandler_t *handler);
+
+/*!
+ * \brief Start XFR handler.
+ *
+ * \param handler XFR handler.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ERROR on error.
+ */
+static inline int xfr_start(xfrhandler_t *handler) {
+	return dt_start(handler->unit);
+}
+
+/*!
+ * \brief Stop XFR handler.
+ *
+ * \param handler XFR handler.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ERROR on error.
+ */
+int xfr_stop(xfrhandler_t *handler);
+
+/*!
+ * \brief Wait for XFR handler to finish.
+ *
+ * \param handler XFR handler.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_ERROR on error.
+ */
+int xfr_join(xfrhandler_t *handler);
+
+/*!
+ * \brief Prepare XFR request.
+ *
+ * \param r XFR request.
+ * \param type Request type.
+ * \param flags Request flags.
+ * \param pkt Query packet or NULL.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_ENOMEM
+ * \retval KNOTD_EINVAL
+ */
+int xfr_request_init(knot_ns_xfr_t *r, int type, int flags, knot_packet_t *pkt);
+
+/*!
+ * \brief Enqueue XFR request.
+ *
+ * \param handler XFR handler instance.
+ * \param req XFR request.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on NULL handler or request.
+ * \retval KNOTD_ERROR on error.
+ */
+int xfr_request(xfrhandler_t *handler, knot_ns_xfr_t *req);
+
+/*!
+ * \brief XFR master runnable.
+ *
+ * Processes incoming AXFR/IXFR requests asynchonously.
+ * When no thread is available at the moment, request is enqueued.
+ *
+ * \param thread Associated thread from DThreads unit.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL invalid parameters.
+ */
+int xfr_worker(dthread_t *thread);
+
+#endif // _KNOTD_XFRHANDLER_H_
+
+/*! @} */
diff --git a/src/knot/server/zones.c b/src/knot/server/zones.c
new file mode 100644
index 0000000..4456dac
--- /dev/null
+++ b/src/knot/server/zones.c
@@ -0,0 +1,2352 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/stat.h>
+
+#include "common/lists.h"
+#include "libknot/dname.h"
+#include "libknot/util/wire.h"
+#include "knot/zone/zone-dump-text.h"
+#include "knot/zone/zone-load.h"
+#include "libknot/zone/zone.h"
+#include "libknot/zone/zonedb.h"
+#include "knot/conf/conf.h"
+#include "knot/other/debug.h"
+#include "knot/other/error.h"
+#include "knot/other/log.h"
+#include "knot/server/notify.h"
+#include "knot/server/server.h"
+#include "libknot/updates/xfr-in.h"
+#include "knot/server/zones.h"
+#include "libknot/util/error.h"
+#include "knot/zone/zone-dump.h"
+#include "libknot/nameserver/name-server.h"
+#include "libknot/updates/changesets.h"
+
+static const size_t XFRIN_CHANGESET_BINARY_SIZE = 100;
+static const size_t XFRIN_CHANGESET_BINARY_STEP = 100;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Wrapper for TCP send.
+ * \todo Implement generic fd pool properly with callbacks.
+ */
+#include "knot/server/tcp-handler.h"
+static int zones_send_cb(int fd, sockaddr_t *addr, uint8_t *msg, size_t msglen)
+{
+	return tcp_send(fd, msg, msglen);
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Zone data destructor function. */
+static int zonedata_destroy(knot_zone_t *zone)
+{
+	dbg_zones_verb("zones: zonedata_destroy(%p) called\n", zone);
+	
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (!zd) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Cancel REFRESH timer. */
+	if (zd->xfr_in.timer) {
+		evsched_t *sch = zd->xfr_in.timer->parent;
+		evsched_cancel(sch, zd->xfr_in.timer);
+		evsched_event_free(sch, zd->xfr_in.timer);
+		zd->xfr_in.timer = 0;
+	}
+
+	/* Cancel EXPIRE timer. */
+	if (zd->xfr_in.expire) {
+		evsched_t *sch = zd->xfr_in.expire->parent;
+		evsched_cancel(sch, zd->xfr_in.expire);
+		evsched_event_free(sch, zd->xfr_in.expire);
+		zd->xfr_in.expire = 0;
+	}
+
+	/* Remove list of pending NOTIFYs. */
+	pthread_mutex_lock(&zd->lock);
+	notify_ev_t *ev = 0, *evn = 0;
+	WALK_LIST_DELSAFE(ev, evn, zd->notify_pending) {
+		zones_cancel_notify(zd, ev);
+	}
+	pthread_mutex_unlock(&zd->lock);
+
+	/* Cancel IXFR DB sync timer. */
+	if (zd->ixfr_dbsync) {
+		evsched_t *sch = zd->ixfr_dbsync->parent;
+		evsched_cancel(sch, zd->ixfr_dbsync);
+		evsched_event_free(sch, zd->ixfr_dbsync);
+		zd->ixfr_dbsync = 0;
+	}
+
+	/* Destroy mutex. */
+	pthread_mutex_destroy(&zd->lock);
+	pthread_mutex_destroy(&zd->xfr_in.lock);
+
+	acl_delete(&zd->xfr_in.acl);
+	acl_delete(&zd->xfr_out);
+	acl_delete(&zd->notify_in);
+	acl_delete(&zd->notify_out);
+
+	/* Close IXFR db. */
+	journal_close(zd->ixfr_db);
+
+	free(zd);
+	
+	/* Invalidate. */
+	zone->dtor = 0;
+	zone->data = 0;
+
+	return KNOTD_EOK;
+}
+
+/*! \brief Zone data constructor function. */
+static int zonedata_init(conf_zone_t *cfg, knot_zone_t *zone)
+{
+	zonedata_t *zd = malloc(sizeof(zonedata_t));
+	if (!zd) {
+		return KNOTD_ENOMEM;
+	}
+
+	/* Link to config. */
+	zd->conf = cfg;
+	zd->server = 0;
+
+	/* Initialize mutex. */
+	pthread_mutex_init(&zd->lock, 0);
+
+	/* Initialize ACLs. */
+	zd->xfr_out = 0;
+	zd->notify_in = 0;
+	zd->notify_out = 0;
+
+	/* Initialize XFR-IN. */
+	sockaddr_init(&zd->xfr_in.master, -1);
+	zd->xfr_in.timer = 0;
+	zd->xfr_in.expire = 0;
+	zd->xfr_in.next_id = -1;
+	zd->xfr_in.acl = 0;
+	zd->xfr_in.wrkr = 0;
+	zd->xfr_in.bootstrap_retry = 0;
+	pthread_mutex_init(&zd->xfr_in.lock, 0);
+
+	/* Initialize NOTIFY. */
+	init_list(&zd->notify_pending);
+
+	/* Initialize IXFR database. */
+	zd->ixfr_db = journal_open(cfg->ixfr_db, cfg->ixfr_fslimit,
+	                           JOURNAL_DIRTY);
+	if (!zd->ixfr_db) {
+		int ret = journal_create(cfg->ixfr_db, JOURNAL_NCOUNT);
+		if (ret != KNOTD_EOK) {
+			log_server_error("Failed to create journal file "
+			                 "'%s'\n", cfg->ixfr_db);
+		}
+		zd->ixfr_db = journal_open(cfg->ixfr_db, cfg->ixfr_fslimit,
+		                           JOURNAL_DIRTY);
+	}
+	
+	if (zd->ixfr_db == 0) {
+		log_server_error("Failed to open journal file "
+		                 "'%s'\n", cfg->ixfr_db);
+	}
+
+	/* Initialize IXFR database syncing event. */
+	zd->ixfr_dbsync = 0;
+
+	/* Set and install destructor. */
+	zone->data = zd;
+	zone->dtor = zonedata_destroy;
+
+	/* Set zonefile SOA serial. */
+	const knot_rrset_t *soa_rrs = 0;
+	const knot_rdata_t *soa_rr = 0;
+
+	/* Load serial. */
+	zd->zonefile_serial = 0;
+	const knot_zone_contents_t *contents = knot_zone_contents(zone);
+	if (contents) {
+		soa_rrs = knot_node_rrset(knot_zone_contents_apex(contents),
+					  KNOT_RRTYPE_SOA);
+		soa_rr = knot_rrset_rdata(soa_rrs);
+		int64_t serial = knot_rdata_soa_serial(soa_rr);
+		zd->zonefile_serial = (uint32_t)serial;
+		if (serial < 0) {
+			return KNOTD_EINVAL;
+		}
+	}
+
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Return SOA timer value.
+ *
+ * \param zone Pointer to zone.
+ * \param rr_func RDATA specificator.
+ * \return Timer in miliseconds.
+ */
+static uint32_t zones_soa_timer(knot_zone_t *zone,
+                                uint32_t (*rr_func)(const knot_rdata_t*))
+{
+	if (!zone) {
+		dbg_zones_verb("zones: zones_soa_timer() called "
+		               "with NULL zone\n");
+	}
+
+	uint32_t ret = 0;
+
+	/* Retrieve SOA RDATA. */
+	const knot_rrset_t *soa_rrs = 0;
+	const knot_rdata_t *soa_rr = 0;
+	knot_zone_contents_t * zc = knot_zone_get_contents((zone));
+	if (!zc) {
+		return 0;
+	}
+
+	soa_rrs = knot_node_rrset(knot_zone_contents_apex(zc),
+	                            KNOT_RRTYPE_SOA);
+	soa_rr = knot_rrset_rdata(soa_rrs);
+	ret = rr_func(soa_rr);
+
+	/* Convert to miliseconds. */
+	return ret * 1000;
+}
+
+/*!
+ * \brief Return SOA REFRESH timer value.
+ *
+ * \param zone Pointer to zone.
+ * \return REFRESH timer in miliseconds.
+ */
+static uint32_t zones_soa_refresh(knot_zone_t *zone)
+{
+	return zones_soa_timer(zone, knot_rdata_soa_refresh);
+}
+
+/*!
+ * \brief Return SOA RETRY timer value.
+ *
+ * \param zone Pointer to zone.
+ * \return RETRY timer in miliseconds.
+ */
+static uint32_t zones_soa_retry(knot_zone_t *zone)
+{
+	return zones_soa_timer(zone, knot_rdata_soa_retry);
+}
+
+/*!
+ * \brief Return SOA EXPIRE timer value.
+ *
+ * \param zone Pointer to zone.
+ * \return EXPIRE timer in miliseconds.
+ */
+static uint32_t zones_soa_expire(knot_zone_t *zone)
+{
+	return zones_soa_timer(zone, knot_rdata_soa_expire);
+}
+
+/*!
+ * \brief XFR/IN expire event handler.
+ */
+static int zones_expire_ev(event_t *e)
+{
+	rcu_read_lock();
+	dbg_zones("zones: EXPIRE timer event\n");
+	knot_zone_t *zone = (knot_zone_t *)e->data;
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+	if (!zone->data) {
+		return KNOTD_EINVAL;
+	}
+
+	zonedata_t *zd = (zonedata_t *)zone->data;
+	
+	/* Won't accept any pending SOA responses. */
+	zd->xfr_in.next_id = -1;
+
+	/* Mark the zone as expired. This will remove the zone contents. */
+	knot_zone_contents_t *contents = knot_zonedb_expire_zone(
+			zd->server->nameserver->zone_db, zone->name);
+
+	if (contents == NULL) {
+		log_server_warning("Non-existent zone expired. Ignoring.\n");
+		rcu_read_unlock();
+		return 0;
+	}
+	
+	
+	rcu_read_unlock();
+	
+	dbg_zones_verb("zones: zone %s expired, waiting for xfers to finish\n",
+	               zd->conf->name);
+	pthread_mutex_lock(&zd->xfr_in.lock);
+	dbg_zones_verb("zones: zone %s locked, no xfers are running\n",
+	               zd->conf->name);
+	
+	synchronize_rcu();
+	pthread_mutex_unlock(&zd->xfr_in.lock);
+	
+	log_server_info("Zone '%s' expired.\n", zd->conf->name);
+	
+	/* Early finish this event to prevent lockup during cancellation. */
+	dbg_zones("zones: zone expired, removing from database\n");
+	evsched_event_finished(e->parent);
+	
+	/* Cancel REFRESH timer. */
+	if (zd->xfr_in.timer) {
+		evsched_cancel(e->parent, zd->xfr_in.timer);
+		evsched_event_free(e->parent, zd->xfr_in.timer);
+		zd->xfr_in.timer = 0;
+	}
+
+	/* Free EXPIRE timer. */
+	if (zd->xfr_in.expire) {
+		evsched_event_free(e->parent, zd->xfr_in.expire);
+		zd->xfr_in.expire = 0;
+	}
+	
+	knot_zone_contents_deep_free(&contents, 0);
+	
+	return 0;
+}
+
+/*!
+ * \brief Zone REFRESH or RETRY event.
+ */
+static int zones_refresh_ev(event_t *e)
+{
+	dbg_zones("zones: REFRESH or RETRY timer event\n");
+	knot_zone_t *zone = (knot_zone_t *)e->data;
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Cancel pending timers. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (!zd) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Prepare buffer for query. */
+	uint8_t qbuf[SOCKET_MTU_SZ];
+	size_t buflen = SOCKET_MTU_SZ;
+
+	/* Lock RCU. */
+	rcu_read_lock();
+
+	/* Check for contents. */
+	if (!knot_zone_contents(zone)) {
+
+		/* Bootstrap from XFR master. */
+		knot_ns_xfr_t xfr_req;
+		memset(&xfr_req, 0, sizeof(knot_ns_xfr_t));
+		memcpy(&xfr_req.addr, &zd->xfr_in.master, sizeof(sockaddr_t));
+		xfr_req.data = (void *)zone;
+		xfr_req.send = zones_send_cb;
+
+		/* Select transfer method. */
+		xfr_req.type = XFR_TYPE_AIN;
+		xfr_req.zone = zone;
+		
+		/* Select TSIG key. */
+		/*!< \todo [TSIG] DISABLED */
+		xfr_req.tsig_key = 0;
+//		if (zd->xfr_in.tsig_key.name) {
+//			xfr_req.tsig_key = &zd->xfr_in.tsig_key;
+//		}
+
+		/* Unlock zone contents. */
+		rcu_read_unlock();
+
+		/* Enqueue XFR request. */
+		int locked = pthread_mutex_trylock(&zd->xfr_in.lock);
+		if (locked != 0) {
+			dbg_zones("zones: already bootstrapping '%s'\n",
+			          zd->conf->name);
+			return KNOTD_EOK;
+		} else {
+			log_zone_info("Attempting to bootstrap zone %s from master\n",
+			              zd->conf->name);
+			pthread_mutex_unlock(&zd->xfr_in.lock);
+		}
+		
+		return xfr_request(zd->server->xfr_h, &xfr_req);
+	}
+	
+	/* Do not issue SOA query if transfer is pending. */
+	int locked = pthread_mutex_trylock(&zd->xfr_in.lock);
+	if (locked != 0) {
+		dbg_zones("zones: zone '%s' is being transferred, "
+		          "deferring SOA query\n",
+		          zd->conf->name);
+		
+		/* Reschedule as RETRY timer. */
+		evsched_schedule(e->parent, e, zones_soa_retry(zone));
+		dbg_zones("zones: RETRY of '%s' after %u seconds\n",
+		          zd->conf->name, zones_soa_retry(zone) / 1000);
+		
+		/* Unlock RCU. */
+		rcu_read_unlock();
+		return KNOTD_EOK;
+	} else {
+		pthread_mutex_unlock(&zd->xfr_in.lock);
+	}
+
+	/* Create query. */
+	/*! \todo API for retrieval of name. */
+	
+	/*! \todo [TSIG] CHANGE!!! only for compatibility now. */
+	knot_ns_xfr_t xfr_req;
+	memset(&xfr_req, 0, sizeof(knot_ns_xfr_t));
+	xfr_req.wire = qbuf;
+	
+	int ret = xfrin_create_soa_query(zone->name, &xfr_req, &buflen);
+	if (ret == KNOT_EOK) {
+
+		sockaddr_t *master = &zd->xfr_in.master;
+
+		/* Create socket on random port. */
+		int sock = socket_create(master->family, SOCK_DGRAM);
+
+		/* Send query. */
+		ret = -1;
+		if (sock > -1) {
+			ret = sendto(sock, qbuf, buflen, 0,
+				     master->ptr, master->len);
+		}
+
+		/* Store ID of the awaited response. */
+		if (ret == buflen) {
+			zd->xfr_in.next_id = knot_wire_get_id(qbuf);
+			dbg_zones("zones: expecting SOA response "
+			          "ID=%d for '%s'\n",
+			          zd->xfr_in.next_id, zd->conf->name);
+		}
+
+		/* Watch socket. */
+		knot_ns_xfr_t req;
+		memset(&req, 0, sizeof(req));
+		req.session = sock;
+		req.type = XFR_TYPE_SOA;
+		req.zone = zone;
+		memcpy(&req.addr, master, sizeof(sockaddr_t));
+		sockaddr_update(&req.addr);
+		xfr_request(zd->server->xfr_h, &req);
+	} else {
+		ret = KNOTD_ERROR;
+	}
+
+	/* Schedule EXPIRE timer on first attempt. */
+	if (!zd->xfr_in.expire) {
+		uint32_t expire_tmr = zones_soa_expire(zone);
+		zd->xfr_in.expire = evsched_schedule_cb(
+					      e->parent,
+					      zones_expire_ev,
+					      zone, expire_tmr);
+		dbg_zones("zones: EXPIRE of '%s' after %u seconds\n",
+		          zd->conf->name, expire_tmr / 1000);
+	}
+
+	/* Reschedule as RETRY timer. */
+	evsched_schedule(e->parent, e, zones_soa_retry(zone));
+	dbg_zones("zones: RETRY of '%s' after %u seconds\n",
+	          zd->conf->name, zones_soa_retry(zone) / 1000);
+
+	/* Unlock RCU. */
+	rcu_read_unlock();
+
+	return ret;
+}
+
+/*!
+ * \brief Send NOTIFY to slave server.
+ */
+static int zones_notify_send(event_t *e)
+{
+	dbg_notify("notify: NOTIFY timer event\n");
+	
+	notify_ev_t *ev = (notify_ev_t *)e->data;
+	knot_zone_t *zone = ev->zone;
+	if (!zone) {
+		log_zone_error("notify: NOTIFY invalid event received\n");
+		evsched_event_free(e->parent, e);
+		free(ev);
+		return KNOTD_EINVAL;
+	}
+
+	/* Check for answered/cancelled query. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	knot_zone_contents_t *contents = knot_zone_get_contents(zone);
+
+	/* Reduce number of available retries. */
+	--ev->retries;
+
+	/* Check number of retries. */
+	if (ev->retries < 0) {
+		log_server_notice("NOTIFY query maximum number of retries "
+				  "for zone %s exceeded.\n",
+				  zd->conf->name);
+		pthread_mutex_lock(&zd->lock);
+		rem_node(&ev->n);
+		evsched_event_free(e->parent, e);
+		free(ev);
+		pthread_mutex_unlock(&zd->lock);
+		return KNOTD_EMALF;
+	}
+
+	/* Prepare buffer for query. */
+	uint8_t qbuf[SOCKET_MTU_SZ];
+	size_t buflen = sizeof(qbuf);
+
+        /* RFC suggests 60s, but it is configurable. */
+        int retry_tmr = ev->timeout * 1000;
+ 
+        /* Reschedule. */
+        conf_read_lock();
+        evsched_schedule(e->parent, e, retry_tmr);
+        dbg_notify("notify: Query RETRY after %u secs (zone '%s')\n",
+                   retry_tmr / 1000, zd->conf->name);
+        conf_read_unlock();
+
+	/* Create query. */
+	int ret = notify_create_request(contents, qbuf, &buflen);
+	if (ret == KNOTD_EOK && zd->server) {
+
+		/* Lock RCU. */
+		rcu_read_lock();
+
+		/* Create socket on random port. */
+		int sock = socket_create(ev->addr.family, SOCK_DGRAM);
+
+		/* Send query. */
+		ret = -1;
+		if (sock > -1) {
+			ret = sendto(sock, qbuf, buflen, 0,
+				     ev->addr.ptr, ev->addr.len);
+		}
+
+		/* Store ID of the awaited response. */
+		if (ret == buflen) {
+			char r_addr[SOCKADDR_STRLEN];
+			sockaddr_tostr(&ev->addr, r_addr, sizeof(r_addr));
+			int r_port = sockaddr_portnum(&ev->addr);
+			ev->msgid = knot_wire_get_id(qbuf);
+			log_server_info("Issued NOTIFY query to %s:%d, expecting "
+					"response ID=%d\n",
+					r_addr, r_port,
+					ev->msgid);
+			
+		}
+
+		/* Watch socket. */
+		knot_ns_xfr_t req;
+		memset(&req, 0, sizeof(req));
+		req.session = sock;
+		req.type = XFR_TYPE_NOTIFY;
+		req.zone = zone;
+		memcpy(&req.addr, &ev->addr, sizeof(sockaddr_t));
+		xfr_request(zd->server->xfr_h, &req);
+
+		/* Unlock RCU */
+		rcu_read_unlock();
+	}
+
+	return ret;
+}
+
+/*! \brief Function for marking nodes as synced and updated. */
+static int zones_ixfrdb_sync_apply(journal_t *j, journal_node_t *n)
+{
+	/* Check for dirty bit (not synced to permanent storage). */
+	if (n->flags & JOURNAL_DIRTY) {
+
+		/* Remove dirty bit. */
+		n->flags = n->flags & ~JOURNAL_DIRTY;
+
+		/* Sync. */
+		journal_update(j, n);
+	}
+
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Sync chagnes in zone to zonefile.
+ */
+static int zones_zonefile_sync_ev(event_t *e)
+{
+	dbg_zones("zones: IXFR database SYNC timer event\n");
+
+	/* Fetch zone. */
+	knot_zone_t *zone = (knot_zone_t *)e->data;
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Fetch zone data. */
+	zonedata_t *zd = (zonedata_t *)zone->data;
+	if (!zd) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Execute zonefile sync. */
+	int ret = zones_zonefile_sync(zone);
+	if (ret == KNOTD_EOK) {
+		log_zone_info("Applied differences of '%s' to zonefile.\n",
+		              zd->conf->name);
+	} else {
+		log_zone_warning("Failed to apply differences of '%s' "
+		                 "to zonefile.\n",
+		                 zd->conf->name);
+	}
+
+	/* Reschedule. */
+	conf_read_lock();
+	evsched_schedule(e->parent, e, zd->conf->dbsync_timeout * 1000);
+	dbg_zones("zones: next IXFR database SYNC of '%s' in %d seconds\n",
+	          zd->conf->name, zd->conf->dbsync_timeout);
+	conf_read_unlock();
+
+	return ret;
+}
+
+/*!
+ * \brief Update ACL list from configuration.
+ *
+ * \param acl Pointer to existing or NULL ACL.
+ * \param acl_list List of remotes from configuration.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOMEM on failed memory allocation.
+ */
+static int zones_set_acl(acl_t **acl, list* acl_list)
+{
+	if (!acl || !acl_list) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Truncate old ACL. */
+	acl_delete(acl);
+
+	/* Create new ACL. */
+	*acl = acl_new(ACL_DENY, 0);
+	if (!*acl) {
+		return KNOTD_ENOMEM;
+	}
+
+	/* Load ACL rules. */
+	conf_remote_t *r = 0;
+	WALK_LIST(r, *acl_list) {
+
+		/* Initialize address. */
+		/*! Port matching disabled, port = 0. */
+		sockaddr_t addr;
+		conf_iface_t *cfg_if = r->remote;
+		int ret = sockaddr_set(&addr, cfg_if->family,
+				       cfg_if->address, 0);
+
+		/* Load rule. */
+		if (ret > 0) {
+			acl_create(*acl, &addr, ACL_ACCEPT);
+		}
+	}
+
+	return KNOTD_EOK;
+}
+
+/*!
+ * \brief Load zone to zone database.
+ *
+ * \param zonedb Zone database to load the zone into.
+ * \param zone_name Zone name (owner of the apex node).
+ * \param source Path to zone file source.
+ * \param filename Path to requested compiled zone file.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_EINVAL
+ * \retval KNOTD_EZONEINVAL
+ */
+static int zones_load_zone(knot_zonedb_t *zonedb, const char *zone_name,
+			   const char *source, const char *filename)
+{
+	knot_zone_t *zone = NULL;
+
+	/* Check path */
+	if (filename) {
+		dbg_zones("zones: parsing zone database '%s'\n", filename);
+		zloader_t *zl = 0;
+		int ret = knot_zload_open(&zl, filename);
+		switch(ret) {
+		case KNOT_EOK:
+			/* OK */
+			break;
+		case KNOT_EFEWDATA:
+			log_server_error("Compiled zone db '%s' not exists.\n",
+					 filename);
+			return KNOTD_EZONEINVAL;
+		case KNOT_ECRC:
+			log_server_error("Compiled zone db CRC mismatches, "
+					 "db is corrupted or .crc file is "
+					 "deleted.\n");
+			return KNOTD_EZONEINVAL;
+		case KNOT_EMALF:
+			log_server_error("Compiled db '%s' is too old, "
+			                 " please recompile.\n",
+			                 filename);
+			return KNOTD_EZONEINVAL;
+		case KNOT_ERROR:
+		case KNOT_ENOMEM:
+		default:
+			log_server_error("Failed to read zone db file '%s'.\n",
+					 filename);
+			return KNOTD_EZONEINVAL;
+		}
+
+		/* Check if the db is up-to-date */
+		int src_changed = strcmp(source, zl->source) != 0;
+		if (src_changed || knot_zload_needs_update(zl)) {
+			log_server_warning("Database for zone '%s' is not "
+			                   "up-to-date. Please recompile.\n",
+			                   zone_name);
+		}
+
+		zone = knot_zload_load(zl);
+		
+		/* Check loaded name. */
+		const knot_dname_t *dname = knot_zone_name(zone);
+		knot_dname_t *dname_req = 0;
+		dname_req = knot_dname_new_from_str(zone_name,
+		                                    strlen(zone_name), 0);
+		if (knot_dname_compare(dname, dname_req) != 0) {
+			log_server_warning("Origin of the zone db file is "
+			                   "different than '%s'\n",
+			                   zone_name);
+			knot_zone_deep_free(&zone, 0);
+			zone = 0;
+			
+		}
+		knot_dname_free(&dname_req);
+
+		/* CLEANUP */
+		//knot_zone_contents_dump(zone->contents, 1);
+
+		if (zone) {
+			/* save the timestamp from the zone db file */
+			struct stat s;
+			stat(filename, &s);
+			knot_zone_set_version(zone, s.st_mtime);
+
+			if (knot_zonedb_add_zone(zonedb, zone) != 0){
+				knot_zone_deep_free(&zone, 0);
+				zone = 0;
+			}
+		}
+
+		knot_zload_close(zl);
+
+		if (!zone) {
+			log_server_error("Failed to load "
+					 "db '%s' for zone '%s'.\n",
+					 filename, zone_name);
+			return KNOTD_EZONEINVAL;
+		}
+	} else {
+		/* db is null. */
+		return KNOTD_EINVAL;
+	}
+
+	/* CLEANUP */
+//	knot_zone_dump(zone, 1);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Return 'serial_from' part of the key. */
+static inline uint32_t ixfrdb_key_from(uint64_t k)
+{
+	/*      64    32       0
+	 * key = [TO   |   FROM]
+	 * Need: Least significant 32 bits.
+	 */
+	return (uint32_t)(k & ((uint64_t)0x00000000ffffffff));
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Return 'serial_to' part of the key. */
+static inline uint32_t ixfrdb_key_to(uint64_t k)
+{
+	/*      64    32       0
+	 * key = [TO   |   FROM]
+	 * Need: Most significant 32 bits.
+	 */
+	return (uint32_t)(k >> (uint64_t)32);
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Compare function to match entries with target serial. */
+static inline int ixfrdb_key_to_cmp(uint64_t k, uint64_t to)
+{
+	/*      64    32       0
+	 * key = [TO   |   FROM]
+	 * Need: Most significant 32 bits.
+	 */
+	return ((uint64_t)ixfrdb_key_to(k)) - to;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Compare function to match entries with starting serial. */
+static inline int ixfrdb_key_from_cmp(uint64_t k, uint64_t from)
+{
+	/*      64    32       0
+	 * key = [TO   |   FROM]
+	 * Need: Least significant 32 bits.
+	 */
+	return ((uint64_t)ixfrdb_key_from(k)) - from;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Make key for journal from serials. */
+static inline uint64_t ixfrdb_key_make(uint32_t from, uint32_t to)
+{
+	/*      64    32       0
+	 * key = [TO   |   FROM]
+	 */
+	return (((uint64_t)to) << ((uint64_t)32)) | ((uint64_t)from);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_changesets_from_binary(knot_changesets_t *chgsets)
+{
+	assert(chgsets != NULL);
+	assert(chgsets->allocated >= chgsets->count);
+	/*
+	 * Parses changesets from the binary format stored in chgsets->data
+	 * into the changeset_t structures.
+	 */
+	knot_rrset_t *rrset = 0;
+	int ret = 0;
+
+	for (int i = 0; i < chgsets->count; ++i) {
+
+		/* Read initial changeset RRSet - SOA. */
+		knot_changeset_t* chs = chgsets->sets + i;
+		size_t remaining = chs->size;
+		ret = knot_zload_rrset_deserialize(&rrset, chs->data, &remaining);
+		if (ret != KNOT_EOK) {
+			dbg_xfr("xfr: SOA: failed to deserialize data "
+			        "from changeset, %s\n", knot_strerror(ret));
+			return KNOTD_EMALF;
+		}
+
+		/* in this special case (changesets loaded
+		 * from journal) the SOA serial should already
+		 * be set, check it.
+		 */
+		assert(knot_rrset_type(rrset) == KNOT_RRTYPE_SOA);
+		assert(chs->serial_from ==
+		       knot_rdata_soa_serial(knot_rrset_rdata(rrset)));
+		knot_changeset_store_soa(&chs->soa_from, &chs->serial_from,
+					 rrset);
+
+		dbg_xfr_verb("xfr: reading RRSets to REMOVE\n");
+
+		/* Read remaining RRSets */
+		int in_remove_section = 1;
+		while (remaining > 0) {
+
+			/* Parse next RRSet. */
+			rrset = 0;
+			uint8_t *stream = chs->data + (chs->size - remaining);
+			ret = knot_zload_rrset_deserialize(&rrset, stream, &remaining);
+			if (ret != KNOT_EOK) {
+				dbg_xfr("xfr: failed to deserialize data "
+				        "from changeset, %s\n",
+				        knot_strerror(ret));
+				return KNOTD_EMALF;
+			}
+
+			/* Check for next SOA. */
+			if (knot_rrset_type(rrset) == KNOT_RRTYPE_SOA) {
+
+				/* Move to ADD section if in REMOVE. */
+				if (in_remove_section) {
+					knot_changeset_store_soa(
+						&chgsets->sets[i].soa_to,
+						&chgsets->sets[i].serial_to,
+						rrset);
+					dbg_xfr_verb("xfr: reading RRSets"
+					             " to ADD\n");
+					in_remove_section = 0;
+				} else {
+					/* Final SOA. */
+					dbg_xfr_verb("xfr: extra SOA\n");
+					knot_rrset_free(&rrset);
+					break;
+				}
+			} else {
+				/* Remove RRSets. */
+				if (in_remove_section) {
+					ret = knot_changeset_add_rrset(
+						&chgsets->sets[i].remove,
+						&chgsets->sets[i].remove_count,
+						&chgsets->sets[i]
+						    .remove_allocated,
+						rrset);
+				} else {
+				/* Add RRSets. */
+					ret = knot_changeset_add_rrset(
+						&chgsets->sets[i].add,
+						&chgsets->sets[i].add_count,
+						&chgsets->sets[i].add_allocated,
+						rrset);
+				}
+
+				/* Check result. */
+				if (ret != KNOT_EOK) {
+					dbg_xfr("xfr: failed to add/remove "
+					        "RRSet to changeset: %s\n",
+					        knot_strerror(ret));
+					return KNOTD_ERROR;
+				}
+			}
+		}
+		
+		dbg_xfr_verb("xfr: read all RRSets in changeset\n");
+	}
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_load_changesets(const knot_zone_t *zone, 
+                                 knot_changesets_t *dst,
+                                 uint32_t from, uint32_t to)
+{
+	if (!zone || !dst) {
+		dbg_zones_detail("Bad arguments: zone=%p, dst=%p\n", zone, dst);
+		return KNOTD_EINVAL;
+	}
+	if (!zone->data) {
+		dbg_zones_detail("Bad arguments: zone->data=%p\n", zone->data);
+		return KNOTD_EINVAL;
+	}
+	
+	dbg_xfr("Loading changesets from serial %u to %u\n", from, to);
+
+	/* Fetch zone-specific data. */
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (!zd->ixfr_db) {
+		dbg_zones_detail("Bad arguments: zd->ixfr_db=%p\n", zone->data);
+		return KNOTD_EINVAL;
+	}
+
+	/* Read entries from starting serial until finished. */
+	uint32_t found_to = from;
+	journal_node_t *n = 0;
+	int ret = journal_fetch(zd->ixfr_db, from, ixfrdb_key_from_cmp, &n);
+	if (ret != KNOTD_EOK) {
+		dbg_xfr("xfr: failed to fetch starting changeset: %s\n",
+		        knotd_strerror(ret));
+		return ret;
+	}
+	
+	while (n != 0 && n != journal_end(zd->ixfr_db)) {
+
+		/* Check for history end. */
+		if (to == found_to) {
+			break;
+		}
+
+		/*! \todo Increment and decrement to reserve +1,
+		 *        but not incremented counter.*/
+		/* Check changesets size if needed. */
+		++dst->count;
+		ret = knot_changesets_check_size(dst);
+		--dst->count;
+		if (ret != KNOT_EOK) {
+			--dst->count;
+			dbg_xfr("xfr: failed to check changesets size: %s\n",
+			        knot_strerror(ret));
+			return KNOTD_ERROR;
+		}
+
+		/* Initialize changeset. */
+		dbg_xfr_detail("xfr: reading entry #%zu id=%llu\n",
+		               dst->count, (unsigned long long)n->id);
+		knot_changeset_t *chs = dst->sets + dst->count;
+		chs->serial_from = ixfrdb_key_from(n->id);
+		chs->serial_to = ixfrdb_key_to(n->id);
+		chs->data = malloc(n->len);
+		if (!chs->data) {
+			return KNOTD_ENOMEM;
+		}
+
+		/* Read journal entry. */
+		ret = journal_read(zd->ixfr_db, n->id,
+				   0, (char*)chs->data);
+		if (ret != KNOTD_EOK) {
+			dbg_xfr("xfr: failed to read data from journal\n");
+			free(chs->data);
+			return KNOTD_ERROR;
+		}
+
+		/* Update changeset binary size. */
+		chs->size = chs->allocated = n->len;
+
+		/* Next node. */
+		found_to = chs->serial_to;
+		++dst->count;
+		++n;
+
+		/*! \todo Check consistency. */
+	}
+	
+	dbg_xfr_detail("xfr: Journal entries read.\n");
+
+	/* Unpack binary data. */
+	ret = zones_changesets_from_binary(dst);
+	if (ret != KNOT_EOK) {
+		dbg_xfr("xfr: failed to unpack changesets "
+		        "from binary, %s\n", knot_strerror(ret));
+		return KNOTD_ERROR;
+	}
+
+	/* Check for complete history. */
+	if (to != found_to) {
+		dbg_xfr_detail("Returning ERANGE\n");
+		return KNOTD_ERANGE;
+	}
+
+	/* History reconstructed. */
+	dbg_xfr_detail("Returning EOK\n");
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Apply changesets to zone from journal.
+ *
+ * \param zone Specified zone.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ENOENT if zone has no contents.
+ * \retval KNOTD_ERROR on unspecified error.
+ */
+static int zones_journal_apply(knot_zone_t *zone)
+{
+	/* Fetch zone. */
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+
+	knot_zone_contents_t *contents = knot_zone_get_contents(zone);
+	zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+	if (!contents || !zd) {
+		return KNOTD_ENOENT;
+	}
+
+	/* Fetch SOA serial. */
+	const knot_rrset_t *soa_rrs = 0;
+	const knot_rdata_t *soa_rr = 0;
+	soa_rrs = knot_node_rrset(knot_zone_contents_apex(contents),
+	                            KNOT_RRTYPE_SOA);
+	soa_rr = knot_rrset_rdata(soa_rrs);
+	int64_t serial_ret = knot_rdata_soa_serial(soa_rr);
+	if (serial_ret < 0) {
+		return KNOTD_EINVAL;
+	}
+	uint32_t serial = (uint32_t)serial_ret;
+
+	/* Load all pending changesets. */
+	dbg_zones_verb("zones: loading all changesets of '%s' from SERIAL %u\n",
+	               zd->conf->name, serial);
+	knot_changesets_t* chsets = malloc(sizeof(knot_changesets_t));
+	memset(chsets, 0, sizeof(knot_changesets_t));
+	/*! \todo Check what should be the upper bound. */
+	int ret = zones_load_changesets(zone, chsets, serial, serial - 1);
+	if (ret == KNOTD_EOK || ret == KNOTD_ERANGE) {
+		if (chsets->count > 0) {
+			/* Apply changesets. */
+			log_server_info("Applying '%zu' changesets from journal "
+			                "to zone '%s'.\n",
+			                chsets->count, zd->conf->name);
+			ret = xfrin_apply_changesets_to_zone(zone, chsets);
+			if (ret != KNOT_EOK) {
+				log_server_error("Failed to apply changesets to "
+				                 "'%s' - %s\n",
+				                 zd->conf->name,
+				                 knot_strerror(ret));
+				ret = KNOTD_ERROR;
+			}
+		}
+	} else {
+		dbg_zones("zones: failed to load changesets - %s\n",
+		          knotd_strerror(ret));
+	}
+
+	/* Free changesets and return. */
+	knot_free_changesets(&chsets);
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Fill the new database with zones.
+ *
+ * Zones that should be retained are just added from the old database to the
+ * new. New zones are loaded.
+ *
+ * \param ns Name server instance.
+ * \param zone_conf Zone configuration.
+ * \param db_old Old zone database.
+ * \param db_new New zone database.
+ *
+ * \return Number of inserted zones.
+ */
+static int zones_insert_zones(knot_nameserver_t *ns,
+			      const list *zone_conf,
+                              const knot_zonedb_t *db_old,
+                              knot_zonedb_t *db_new)
+{
+	/*! \todo Change to zone contents. */
+
+	node *n = 0;
+	int inserted = 0;
+	/* for all zones in the configuration */
+	WALK_LIST(n, *zone_conf) {
+		conf_zone_t *z = (conf_zone_t *)n;
+
+		/* Convert the zone name into a domain name. */
+		/* Local allocation, will be discarded. */
+		knot_dname_t *zone_name = knot_dname_new_from_str(z->name,
+		                                         strlen(z->name), NULL);
+		if (zone_name == NULL) {
+			log_server_error("Error creating domain name from zone"
+			                 " name\n");
+			return inserted;
+		}
+
+		dbg_zones_verb("zones: inserting zone %s into the new database.\n",
+		               z->name);
+
+		/* try to find the zone in the current zone db */
+		knot_zone_t *zone = knot_zonedb_find_zone(db_old,
+		                                          zone_name);
+		int reload = 0;
+
+		/* Attempt to bootstrap if db or source does not exist. */
+		struct stat s;
+		int stat_ret = stat(z->file, &s);
+		if (zone != NULL) {
+			/* if found, check timestamp of the file against the
+			 * loaded zone
+			 */
+			if (knot_zone_version(zone) < s.st_mtime) {
+				/* the file is newer, reload! */
+				reload = 1;
+			}
+		} else {
+			reload = 1;
+		}
+
+		/* Reload zone file. */
+		int ret = KNOTD_ERROR;
+		if (reload) {
+			/* Zone file not exists and has master set. */
+			if (stat_ret < 0 && !EMPTY_LIST(z->acl.xfr_in)) {
+
+				/* Create stub database. */
+				dbg_zones_verb("zones: loading stub zone '%s' "
+				               "for bootstrap.\n",
+				               z->name);
+				knot_dname_t *owner = 0;
+				owner = knot_dname_deep_copy(zone_name);
+				knot_zone_t* sz = knot_zone_new_empty(owner);
+				if (sz) {
+					/* Add stub zone to db_new. */
+					ret = knot_zonedb_add_zone(db_new, sz);
+					if (ret != KNOT_EOK) {
+						dbg_zones("zones: failed to add "
+						          "stub zone '%s'.\n",
+						          z->name);
+						knot_zone_deep_free(&sz, 0);
+						sz = 0;
+						ret = KNOTD_ERROR;
+					} else {
+						log_server_info("Will attempt to "
+								"bootstrap zone "
+								"%s from AXFR "
+								"master.\n",
+								z->name);
+						--inserted;
+					}
+
+				} else {
+					dbg_zones("zones: failed to create "
+					          "stub zone '%s'.\n",
+					          z->name);
+					ret = KNOTD_ERROR;
+				}
+
+			} else {
+				dbg_zones_verb("zones: loading zone '%s' "
+				               "from '%s'\n",
+				               z->name,
+				               z->db);
+				ret = zones_load_zone(db_new, z->name,
+							  z->file, z->db);
+				if (ret == KNOTD_EOK) {
+					log_server_info("Loaded zone '%s'\n",
+					                z->name);
+				} else {
+					log_server_error("Failed to load zone "
+					                 "'%s' - %s\n",
+					                 z->name,
+					                 knotd_strerror(ret));
+				}
+			}
+
+			/* Find zone. */
+			if (ret == KNOTD_EOK) {
+				/* Find the new zone */
+				zone = knot_zonedb_find_zone(db_new,
+				                             zone_name);
+				++inserted;
+				
+				dbg_zones_verb("zones: inserted '%s' into "
+				               "database, initializing data\n",
+				               z->name);
+
+				/* Initialize zone-related data. */
+				zonedata_init(z, zone);
+
+			}
+			/* unused return value, if not loaded, just continue */
+		} else {
+			/* just insert the zone into the new zone db */
+			dbg_zones_verb("zones: found '%s' in old database, "
+			               "copying to new.\n",
+			               z->name);
+			log_server_info("Zone '%s' is up-to-date, no need "
+			                "for reload.\n", z->name);
+			int ret = knot_zonedb_add_zone(db_new, zone);
+			if (ret != KNOT_EOK) {
+				log_server_error("Error adding known zone '%s' to"
+				                 " the new database - %s\n",
+				                 z->name, knot_strerror(ret));
+				ret = KNOTD_ERROR;
+			} else {
+				++inserted;
+			}
+		}
+
+		/* Update zone data. */
+		if (zone) {
+			zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+
+			/* Update refs. */
+			zd->conf = z;
+
+			/* Update ACLs. */
+			dbg_zones("Updating zone ACLs.\n");
+			zones_set_acl(&zd->xfr_in.acl, &z->acl.xfr_in);
+			zones_set_acl(&zd->xfr_out, &z->acl.xfr_out);
+			zones_set_acl(&zd->notify_in, &z->acl.notify_in);
+			zones_set_acl(&zd->notify_out, &z->acl.notify_out);
+
+			/* Update server pointer. */
+			zd->server = (server_t *)knot_ns_get_data(ns);
+
+			/* Update master server address. */
+			memset(&zd->xfr_in.tsig_key, 0, sizeof(knot_key_t));
+			sockaddr_init(&zd->xfr_in.master, -1);
+			if (!EMPTY_LIST(z->acl.xfr_in)) {
+				conf_remote_t *r = HEAD(z->acl.xfr_in);
+				conf_iface_t *cfg_if = r->remote;
+				sockaddr_set(&zd->xfr_in.master,
+					     cfg_if->family,
+					     cfg_if->address,
+					     cfg_if->port);
+				/*!< \todo [TSIG] DISABLED */
+//				if (cfg_if->key) {
+//					memcpy(&zd->xfr_in.tsig_key,
+//					       cfg_if->key,
+//					       sizeof(knot_key_t));
+//				}
+
+				dbg_zones("zones: using %s:%d as XFR master "
+				          "for '%s'\n",
+				          cfg_if->address,
+				          cfg_if->port,
+				          z->name);
+			}
+
+			/* Apply changesets from journal. */
+			zones_journal_apply(zone);
+
+			/* Update events scheduled for zone. */
+			zones_timers_update(zone, z, 
+			             ((server_t *)knot_ns_get_data(ns))->sched);
+		}
+
+		/* CLEANUP */
+//		knot_zone_contents_dump(knot_zone_get_contents(zone), 1);
+
+		/* Directly discard zone. */
+		knot_dname_free(&zone_name);
+	}
+	return inserted;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Remove zones present in the configuration from the old database.
+ *
+ * After calling this function, the old zone database should contain only zones
+ * that should be completely deleted.
+ *
+ * \param zone_conf Zone configuration.
+ * \param db_old Old zone database to remove zones from.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_ERROR
+ */
+static int zones_remove_zones(const knot_zonedb_t *db_new,
+                              knot_zonedb_t *db_old)
+{
+	const knot_zone_t **new_zones = knot_zonedb_zones(db_new);
+	if (new_zones == NULL) {
+		return KNOTD_ENOMEM;
+	}
+
+	for (int i = 0; i < knot_zonedb_zone_count(db_new); ++i) {
+		/* try to find the new zone in the old DB
+		 * if the pointers match, remove the zone from old DB
+		 */
+		/*! \todo Find better way of removing zone with given pointer.*/
+		knot_zone_t *old_zone = knot_zonedb_find_zone(
+		                        db_old, knot_zone_name(new_zones[i]));
+		if (old_zone == new_zones[i]) {
+dbg_zones_exec(
+			char *name = knot_dname_to_str(knot_zone_name(old_zone));
+			dbg_zones_verb("zones: zone pointers match, removing zone %s "
+                                       "from database.\n", name);
+			free(name);
+);
+			knot_zone_t * rm = knot_zonedb_remove_zone(db_old,
+			                              knot_zone_name(old_zone));
+			assert(rm == old_zone);
+		}
+	}
+
+	free(new_zones);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int zones_update_db_from_config(const conf_t *conf, knot_nameserver_t *ns,
+                               knot_zonedb_t **db_old)
+{
+	/* Check parameters */
+	if (conf == NULL || ns == NULL) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Lock RCU to ensure none will deallocate any data under our hands. */
+	rcu_read_lock();
+
+	/* Grab a pointer to the old database */
+	*db_old = ns->zone_db;
+	if (*db_old == NULL) {
+		log_server_error("Missing zone database in nameserver structure"
+		                 ".\n");
+		return KNOTD_ERROR;
+	}
+
+	/* Create new zone DB */
+	knot_zonedb_t *db_new = knot_zonedb_new();
+	if (db_new == NULL) {
+		return KNOTD_ERROR;
+	}
+
+	log_server_info("Loading %d compiled zones...\n", conf->zones_count);
+
+	/* Insert all required zones to the new zone DB. */
+	int inserted = zones_insert_zones(ns, &conf->zones, *db_old, db_new);
+
+	log_server_info("Loaded %d out of %d zones.\n", inserted,
+	                conf->zones_count);
+
+	if (inserted != conf->zones_count) {
+		log_server_warning("Not all the zones were loaded.\n");
+	}
+
+	dbg_zones_detail("zones: old db in nameserver: %p, old db stored: %p, new db: %p\n",
+	                 ns->zone_db, *db_old, db_new);
+
+	/* Switch the databases. */
+	(void)rcu_xchg_pointer(&ns->zone_db, db_new);
+
+	dbg_zones_detail("db in nameserver: %p, old db stored: %p, new db: %p\n",
+	                 ns->zone_db, *db_old, db_new);
+
+	/*
+	 * Remove all zones present in the new DB from the old DB.
+	 * No new thread can access these zones in the old DB, as the
+	 * databases are already switched.
+	 *
+	 * Beware - only the exact same zones (same pointer) may be removed.
+	 * All other have been loaded again so that the old must be destroyed.
+	 */
+	int ret = zones_remove_zones(db_new, *db_old);
+	if (ret != KNOTD_EOK) {
+		return ret;
+	}
+
+	/* Unlock RCU, messing with any data will not affect us now */
+	rcu_read_unlock();
+
+	return KNOTD_EOK;
+}
+
+int zones_zonefile_sync(knot_zone_t *zone)
+{
+	if (!zone) {
+		return KNOTD_EINVAL;
+	}
+	if (!zone->data) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Fetch zone data. */
+	zonedata_t *zd = (zonedata_t *)zone->data;
+
+	/* Lock zone data. */
+	pthread_mutex_lock(&zd->lock);
+
+	knot_zone_contents_t *contents = knot_zone_get_contents(zone);
+	if (!contents) {
+		pthread_mutex_unlock(&zd->lock);
+		return KNOTD_EINVAL;
+	}
+
+	/* Latest zone serial. */
+	const knot_rrset_t *soa_rrs = 0;
+	const knot_rdata_t *soa_rr = 0;
+	soa_rrs = knot_node_rrset(knot_zone_contents_apex(contents),
+	                            KNOT_RRTYPE_SOA);
+	soa_rr = knot_rrset_rdata(soa_rrs);
+	int64_t serial_ret = knot_rdata_soa_serial(soa_rr);
+	if (serial_ret < 0) {
+		return KNOTD_EINVAL;
+	}
+	uint32_t serial_to = (uint32_t)serial_ret;
+
+	/* Check for difference against zonefile serial. */
+	if (zd->zonefile_serial != serial_to) {
+
+		/* Save zone to zonefile. */
+		conf_read_lock();
+		dbg_zones("zones: syncing '%s' differences to '%s' "
+		          "(SOA serial %u)\n",
+		          zd->conf->name, zd->conf->file, serial_to);
+		zone_dump_text(contents, zd->conf->file);
+		conf_read_unlock();
+
+		/* Update journal entries. */
+		dbg_zones_verb("zones: unmarking all dirty nodes "
+		               "in '%s' journal\n",
+		               zd->conf->name);
+		journal_walk(zd->ixfr_db, zones_ixfrdb_sync_apply);
+
+		/* Update zone file serial. */
+		dbg_zones("zones: new '%s' zonefile serial is %u\n",
+		          zd->conf->name, serial_to);
+		zd->zonefile_serial = serial_to;
+	} else {
+		dbg_zones_verb("zones: '%s' zonefile is in sync "
+		               "with differences\n", zd->conf->name);
+	}
+
+	/* Unlock zone data. */
+	pthread_mutex_unlock(&zd->lock);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_xfr_check_zone(knot_ns_xfr_t *xfr, knot_rcode_t *rcode)
+{
+	if (xfr == NULL || rcode == NULL) {
+		*rcode = KNOT_RCODE_SERVFAIL;
+		return KNOTD_EINVAL;
+	}
+
+	/* Check if the zone is found. */
+	if (xfr->zone == NULL) {
+		*rcode = KNOT_RCODE_REFUSED;
+		return KNOTD_EACCES;
+	}
+	
+	/* Check zone data. */
+	zonedata_t *zd = (zonedata_t *)xfr->zone->data;
+	if (zd == NULL) {
+		dbg_zones("zones: invalid zone data for zone %p\n", xfr->zone);
+		*rcode = KNOT_RCODE_SERVFAIL;
+		return KNOTD_ERROR;
+	}
+	
+	/* Check zone contents. */
+	if (knot_zone_contents(xfr->zone) == NULL) {
+		dbg_zones("zones: invalid zone contents for zone %p\n", xfr->zone);
+		*rcode = KNOT_RCODE_SERVFAIL;
+		return KNOTD_EEXPIRED;
+	}
+
+	// Check xfr-out ACL
+	if (acl_match(zd->xfr_out, &xfr->addr) == ACL_DENY) {
+		log_answer_warning("Unauthorized request for XFR '%s/OUT'.\n",
+		                   zd->conf->name);
+		*rcode = KNOT_RCODE_REFUSED;
+		return KNOTD_EACCES;
+	} else {
+		dbg_zones("zones: authorized XFR '%s/OUT'\n",
+		          zd->conf->name);
+	}
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_process_response(knot_nameserver_t *nameserver, 
+                           sockaddr_t *from,
+                           knot_packet_t *packet, uint8_t *response_wire,
+                           size_t *rsize)
+{
+	if (!packet || !rsize || nameserver == NULL || from == NULL ||
+	    response_wire == NULL) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Handle SOA query response, cancel EXPIRE timer
+	 * and start AXFR transfer if needed.
+	 * Reset REFRESH timer on finish.
+	 */
+	if (knot_packet_qtype(packet) == KNOT_RRTYPE_SOA) {
+		
+		if (knot_packet_rcode(packet) != KNOT_RCODE_NOERROR) {
+			/*! \todo Handle error response. */
+			return KNOTD_ERROR;
+		}
+
+		/* No response. */
+		*rsize = 0;
+
+		/* Find matching zone and ID. */
+		const knot_dname_t *zone_name = knot_packet_qname(packet);
+		/*! \todo Change the access to the zone db. */
+		knot_zone_t *zone = knot_zonedb_find_zone(
+		                        nameserver->zone_db,
+		                        zone_name);
+
+		/* Get zone contents. */
+		rcu_read_lock();
+		const knot_zone_contents_t *contents =
+				knot_zone_contents(zone);
+
+		if (!zone || !knot_zone_data(zone) || !contents) {
+			rcu_read_unlock();
+			return KNOTD_EINVAL;
+		}
+
+		/* Match ID against awaited. */
+		zonedata_t *zd = (zonedata_t *)knot_zone_data(zone);
+		uint16_t pkt_id = knot_packet_id(packet);
+		if ((int)pkt_id != zd->xfr_in.next_id) {
+			rcu_read_unlock();
+			return KNOTD_ERROR;
+		}
+
+		/* Check SOA SERIAL. */
+		int ret = xfrin_transfer_needed(contents, packet);
+		dbg_zones_verb("xfrin_transfer_needed() returned %d\n", ret);
+		if (ret < 0) {
+			/* RETRY/EXPIRE timers running, do not interfere. */
+			return KNOTD_ERROR;
+		}
+		
+		/* No updates available. */
+		evsched_t *sched =
+			((server_t *)knot_ns_get_data(nameserver))->sched;
+		if (ret == 0) {
+			log_zone_info("SOA query for zone '%s' answered, no "
+				      "transfer needed.\n", zd->conf->name);
+			rcu_read_unlock();
+
+			/* Reinstall timers. */
+			zones_timers_update(zone, zd->conf, sched);
+			return KNOTD_EOK;
+		}
+		
+		assert(ret > 0);
+		
+		/* Already transferring. */
+		if (pthread_mutex_trylock(&zd->xfr_in.lock) != 0) {
+			/* Unlock zone contents. */
+			dbg_zones("zones: SOA response received, but zone is "
+			          "being transferred, refusing to start another "
+			          "transfer\n");
+			rcu_read_unlock();
+			return KNOTD_EOK;
+		} else {
+			pthread_mutex_unlock(&zd->xfr_in.lock);
+		}
+
+		/* Prepare XFR client transfer. */
+		knot_ns_xfr_t xfr_req;
+		memset(&xfr_req, 0, sizeof(knot_ns_xfr_t));
+		memcpy(&xfr_req.addr, from, sizeof(sockaddr_t));
+		xfr_req.zone = (void *)zone;
+		xfr_req.send = zones_send_cb;
+
+		/* Select transfer method. */
+		xfr_req.type = zones_transfer_to_use(contents);
+		
+		/* Select TSIG key. */
+		/*!< \todo [TSIG] DISABLED */
+		xfr_req.tsig_key = 0;
+		/* CLEANUP */
+//		if (zd->xfr_in.tsig_key.name) {
+//			xfr_req.tsig_key = &zd->xfr_in.tsig_key;
+//		}
+
+		/* Unlock zone contents. */
+		rcu_read_unlock();
+
+		/* Enqueue XFR request. */
+		return xfr_request(((server_t *)knot_ns_get_data(
+		                     nameserver))->xfr_h, &xfr_req);
+	}
+
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_ns_xfr_type_t zones_transfer_to_use(const knot_zone_contents_t *zone)
+{
+	/*! \todo Implement. */
+	return XFR_TYPE_IIN;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_find_zone_for_xfr(const knot_zone_contents_t *zone, 
+                                   const char **zonefile, const char **zonedb)
+{
+	/* find the zone file name and zone db file name for the zone */
+	conf_t *cnf = conf();
+	node *n = NULL;
+	WALK_LIST(n, cnf->zones) {
+		conf_zone_t *zone_conf = (conf_zone_t *)n;
+		knot_dname_t *zone_name = knot_dname_new_from_str(
+			zone_conf->name, strlen(zone_conf->name), NULL);
+		if (zone_name == NULL) {
+			return KNOTD_ENOMEM;
+		}
+
+		int r = knot_dname_compare(zone_name, knot_node_owner(
+		                              knot_zone_contents_apex(zone)));
+
+		/* Directly discard dname, won't be needed. */
+		knot_dname_free(&zone_name);
+
+		if (r == 0) {
+			/* found the right zone */
+			*zonefile = zone_conf->file;
+			*zonedb = zone_conf->db;
+			return KNOTD_EOK;
+		}
+	}
+
+	char *name = knot_dname_to_str(knot_node_owner(
+	                 knot_zone_contents_apex(zone)));
+	dbg_zones("zones: no zone found for the zone received by transfer "
+	          "(%s).\n", name);
+	free(name);
+
+	return KNOTD_ENOENT;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static char *zones_find_free_filename(const char *old_name)
+{
+	/* find zone name not present on the disk */
+	int free_name = 0;
+	size_t name_size = strlen(old_name);
+
+	char *new_name = malloc(name_size + 3);
+	if (new_name == NULL) {
+		return NULL;
+	}
+	memcpy(new_name, old_name, name_size);
+	new_name[name_size] = '.';
+	new_name[name_size + 2] = 0;
+
+	dbg_zones_verb("zones: finding free name for the zone file.\n");
+	int c = 48;
+	FILE *file;
+	while (!free_name && c < 58) {
+		new_name[name_size + 1] = c;
+		dbg_zones_verb("zones: trying file name %s\n", new_name);
+		if ((file = fopen(new_name, "r")) != NULL) {
+			fclose(file);
+			++c;
+		} else {
+			free_name = 1;
+		}
+	}
+
+	if (free_name) {
+		return new_name;
+	} else {
+		free(new_name);
+		return NULL;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_dump_xfr_zone_text(knot_zone_contents_t *zone, 
+                                    const char *zonefile)
+{
+	assert(zone != NULL && zonefile != NULL);
+
+	/*! \todo new_zonefile may be created by another process,
+	 *        until the zone_dump_text is called. Needs to be opened in
+	 *        this function for writing.
+	 *        Use open() for exclusive open and fcntl() for locking.
+	 */
+
+	char *new_zonefile = zones_find_free_filename(zonefile);
+
+	if (new_zonefile == NULL) {
+		dbg_zones("zones: failed to find free filename for temporary "
+		          "storage of the zone text file.\n");
+		return KNOTD_ERROR;	/*! \todo New error code? */
+	}
+
+	int rc = zone_dump_text(zone, new_zonefile);
+
+	if (rc != KNOTD_EOK) {
+		dbg_zones("Failed to save the zone to text zone file '%s'.\n",
+		          new_zonefile);
+		free(new_zonefile);
+		return KNOTD_ERROR;
+	}
+
+	/*! \todo this would also need locking as well. */
+	struct stat s;
+	rc = stat(zonefile, &s);
+	if (rc < 0 || remove(zonefile) == 0) {
+		if (rename(new_zonefile, zonefile) != 0) {
+			dbg_zones("Failed to replace old zonefile '%s'' with new"
+			          " zone file '%s'.\n", zonefile, new_zonefile);
+			/*! \todo with proper locking, this shouldn't happen,
+			 *        revise it later on.
+			 */
+			zone_dump_text(zone, zonefile);
+			return KNOTD_ERROR;
+		}
+	} else {
+		dbg_zones("zones: failed to replace old zonefile '%s'.\n",
+		          zonefile);
+		return KNOTD_ERROR;
+	}
+
+	free(new_zonefile);
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_dump_xfr_zone_binary(knot_zone_contents_t *zone, 
+                                   const char *zonedb,
+                                   const char *zonefile)
+{
+	assert(zone != NULL && zonedb != NULL);
+
+	/*! \todo new_zonedb may be created by another process,
+	 *        until the zone_dump_text is called. Needs to be opened in
+	 *        this function for writing.
+	 *        Use open() for exclusive open and fcntl() for locking.
+	 */
+	char *new_zonedb = zones_find_free_filename(zonedb);
+
+	if (new_zonedb == NULL) {
+		dbg_zones("zones: failed to find free filename for temporary "
+		          "storage of the zone binary file '%s'\n",
+		          zonedb);
+		return KNOTD_ERROR;	/*! \todo New error code? */
+	}
+
+	/*! \todo this would also need locking as well. */
+	int rc = knot_zdump_dump_and_swap(zone, new_zonedb, zonedb, zonefile);
+	free(new_zonedb);
+
+	if (rc != KNOT_EOK) {
+		return KNOTD_ERROR;
+	}
+
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_save_zone(const knot_ns_xfr_t *xfr)
+{
+	if (xfr == NULL || xfr->data == NULL) {
+		return KNOTD_EINVAL;
+	}
+	
+	knot_zone_contents_t *zone = 
+		(knot_zone_contents_t *)xfr->data;
+	
+	const char *zonefile = NULL;
+	const char *zonedb = NULL;
+	
+	int ret = zones_find_zone_for_xfr(zone, &zonefile, &zonedb);
+	if (ret != KNOTD_EOK) {
+		return ret;
+	}
+	
+	assert(zonefile != NULL && zonedb != NULL);
+	
+	/* dump the zone into text zone file */
+	ret = zones_dump_xfr_zone_text(zone, zonefile);
+	if (ret != KNOTD_EOK) {
+		return KNOTD_ERROR;
+	}
+	/* dump the zone into binary db file */
+	ret = ns_dump_xfr_zone_binary(zone, zonedb, zonefile);
+	if (ret != KNOTD_EOK) {
+		return KNOTD_ERROR;
+	}
+	
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_ns_conf_hook(const struct conf_t *conf, void *data)
+{
+	knot_nameserver_t *ns = (knot_nameserver_t *)data;
+	dbg_zones_verb("zones: reconfiguring name server.\n");
+
+	knot_zonedb_t *old_db = 0;
+
+	int ret = zones_update_db_from_config(conf, ns, &old_db);
+	if (ret != KNOTD_EOK) {
+		return ret;
+	}
+	/* Wait until all readers finish with reading the zones. */
+	synchronize_rcu();
+
+	dbg_zones_verb("zones: nameserver's zone db: %p, old db: %p\n",
+	               ns->zone_db, old_db);
+
+	/* Delete all deprecated zones and delete the old database. */
+	knot_zonedb_deep_free(&old_db);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_check_binary_size(uint8_t **data, size_t *allocated,
+                                   size_t required)
+{
+	if (required <= *allocated) {
+		return KNOTD_EOK;
+	}
+
+	/* Allocate new memory block. */
+	size_t new_count = required;
+	uint8_t *new_data = malloc(new_count * sizeof(uint8_t));
+	if (new_data == NULL) {
+		return KNOTD_ENOMEM;
+	}
+
+	/* Clear memory block and copy old data. */
+	memset(new_data, 0, new_count * sizeof(uint8_t));
+	memcpy(new_data, *data, *allocated);
+
+	/* Switch pointers and free old pointer. */
+	free(*data);
+	*data = new_data;
+	*allocated = new_count;
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_changeset_rrset_to_binary(uint8_t **data, size_t *size,
+                                           size_t *allocated,
+                                           knot_rrset_t *rrset)
+{
+	assert(data != NULL);
+	assert(size != NULL);
+	assert(allocated != NULL);
+
+	/*
+	 * In *data, there is the whole changeset in the binary format,
+	 * the actual RRSet will be just appended to it
+	 */
+
+	uint8_t *binary = NULL;
+	size_t actual_size = 0;
+	int ret = knot_zdump_rrset_serialize(rrset, &binary, &actual_size);
+	if (ret != KNOT_EOK) {
+		return KNOTD_ERROR;  /*! \todo Other code? */
+	}
+
+	ret = zones_check_binary_size(data, allocated, *size + actual_size);
+	if (ret != KNOT_EOK) {
+		free(binary);
+		return KNOTD_ERROR;
+	}
+
+	memcpy(*data + *size, binary, actual_size);
+	*size += actual_size;
+	free(binary);
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int zones_changesets_to_binary(knot_changesets_t *chgsets)
+{
+	assert(chgsets != NULL);
+	assert(chgsets->allocated >= chgsets->count);
+
+	/*
+	 * Converts changesets to the binary format stored in chgsets->data
+	 * from the changeset_t structures.
+	 */
+	int ret;
+
+	for (int i = 0; i < chgsets->count; ++i) {
+		knot_changeset_t *ch = &chgsets->sets[i];
+		assert(ch->data == NULL);
+		assert(ch->size == 0);
+
+		/* 1) origin SOA */
+		ret = zones_changeset_rrset_to_binary(&ch->data, &ch->size,
+		                                &ch->allocated, ch->soa_from);
+		if (ret != KNOT_EOK) {
+			free(ch->data);
+			ch->data = NULL;
+			dbg_zones("zones_changeset_rrset_to_binary(): %s\n",
+			          knot_strerror(ret));
+			return KNOTD_ERROR;
+		}
+
+		int j;
+
+		/* 2) remove RRsets */
+		assert(ch->remove_allocated >= ch->remove_count);
+		for (j = 0; j < ch->remove_count; ++j) {
+			ret = zones_changeset_rrset_to_binary(&ch->data,
+			                                      &ch->size,
+			                                      &ch->allocated,
+			                                      ch->remove[j]);
+			if (ret != KNOT_EOK) {
+				free(ch->data);
+				ch->data = NULL;
+				dbg_zones("zones_changeset_rrset_to_binary(): %s\n",
+					  knot_strerror(ret));
+				return KNOTD_ERROR;
+			}
+		}
+
+		/* 3) new SOA */
+		ret = zones_changeset_rrset_to_binary(&ch->data, &ch->size,
+		                                &ch->allocated, ch->soa_to);
+		if (ret != KNOT_EOK) {
+			free(ch->data);
+			ch->data = NULL;
+			dbg_zones("zones_changeset_rrset_to_binary(): %s\n",
+				  knot_strerror(ret));
+			return KNOTD_ERROR;
+		}
+
+		/* 4) add RRsets */
+		assert(ch->add_allocated >= ch->add_count);
+		for (j = 0; j < ch->add_count; ++j) {
+			ret = zones_changeset_rrset_to_binary(&ch->data,
+			                                      &ch->size,
+			                                      &ch->allocated,
+			                                      ch->add[j]);
+			if (ret != KNOT_EOK) {
+				free(ch->data);
+				ch->data = NULL;
+				dbg_zones("zones_changeset_rrset_to_binary(): %s\n",
+					  knot_strerror(ret));
+				return KNOTD_ERROR;
+			}
+		}
+	}
+
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_store_changesets(knot_ns_xfr_t *xfr)
+{
+	if (xfr == NULL || xfr->data == NULL || xfr->zone == NULL) {
+		return KNOTD_EINVAL;
+	}
+	
+	knot_zone_t *zone = xfr->zone;
+	knot_changesets_t *src = (knot_changesets_t *)xfr->data;
+	
+	/*! \todo Convert to binary format. */
+	
+	int ret = zones_changesets_to_binary(src);
+	if (ret != KNOTD_EOK) {
+		return ret;
+	}
+
+	/* Fetch zone-specific data. */
+	zonedata_t *zd = (zonedata_t *)zone->data;
+	if (!zd->ixfr_db) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Begin writing to journal. */
+	for (unsigned i = 0; i < src->count; ++i) {
+
+		/* Make key from serials. */
+		knot_changeset_t* chs = src->sets + i;
+		uint64_t k = ixfrdb_key_make(chs->serial_from, chs->serial_to);
+
+		/* Write entry. */
+		int ret = journal_write(zd->ixfr_db, k, (const char*)chs->data,
+		                        chs->size);
+
+		/* Check for errors. */
+		while (ret != KNOTD_EOK) {
+
+			/* Sync to zonefile may be needed. */
+			if (ret == KNOTD_EAGAIN) {
+
+				/* Cancel sync timer. */
+				event_t *tmr = zd->ixfr_dbsync;
+				if (tmr) {
+					dbg_xfr_verb("xfr: cancelling zonefile "
+					             "SYNC timer of '%s'\n",
+					             zd->conf->name);
+					evsched_cancel(tmr->parent, tmr);
+				}
+
+				/* Synchronize. */
+				dbg_xfr_verb("xfr: forcing zonefile SYNC "
+				             "of '%s'\n",
+				             zd->conf->name);
+				ret = zones_zonefile_sync(zone);
+				if (ret != KNOTD_EOK) {
+					continue;
+				}
+
+				/* Reschedule sync timer. */
+				if (tmr) {
+					/* Fetch sync timeout. */
+					conf_read_lock();
+					int timeout = zd->conf->dbsync_timeout;
+					timeout *= 1000; /* Convert to ms. */
+					conf_read_unlock();
+
+					/* Reschedule. */
+					dbg_xfr_verb("xfr: resuming SYNC "
+					             "of '%s'\n",
+					             zd->conf->name);
+					evsched_schedule(tmr->parent, tmr,
+					                 timeout);
+
+				}
+
+				/* Attempt to write again. */
+				ret = journal_write(zd->ixfr_db, k,
+						    (const char*)chs->data,
+						    chs->size);
+			} else {
+				/* Other errors. */
+				return KNOTD_ERROR;
+			}
+		}
+
+		/* Free converted binary data. */
+		free(chs->data);
+		chs->data = 0;
+		chs->size = 0;
+	}
+
+	/* Written changesets to journal. */
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_xfr_load_changesets(knot_ns_xfr_t *xfr, uint32_t serial_from,
+                              uint32_t serial_to) 
+{
+	if (!xfr || !xfr->zone || !knot_zone_contents(xfr->zone)) {
+		dbg_zones_detail("Wrong parameters: xfr=%p,"
+		                " xfr->zone = %p\n", xfr, xfr->zone);
+		return KNOTD_EINVAL;
+	}
+	
+	knot_changesets_t *chgsets = (knot_changesets_t *)
+	                               calloc(1, sizeof(knot_changesets_t));
+	CHECK_ALLOC_LOG(chgsets, KNOTD_ENOMEM);
+	
+	int ret = ns_serial_compare(serial_to, serial_from);
+	dbg_zones_verb("Compared serials, result: %d\n", ret);
+	
+	/* if serial_to is not larger than serial_from, do not load anything */
+	if (ret <= 0) {
+		xfr->data = chgsets;
+		return KNOTD_EOK;
+	}
+	
+	dbg_zones("Loading changesets...\n");
+	
+	ret = zones_load_changesets(xfr->zone, chgsets,
+	                                serial_from, serial_to);
+	if (ret != KNOTD_EOK) {
+		dbg_zones_verb("Loading changesets failed: %s\n",
+		               knotd_strerror(ret));
+		return ret;
+	}
+	
+	xfr->data = chgsets;
+	return KNOTD_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_apply_changesets(knot_ns_xfr_t *xfr) 
+{
+	if (xfr == NULL || xfr->zone == NULL || xfr->data == NULL) {
+		return KNOTD_EINVAL;
+	}
+	
+	return xfrin_apply_changesets_to_zone(xfr->zone, 
+	                                      (knot_changesets_t *)xfr->data);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int zones_timers_update(knot_zone_t *zone, conf_zone_t *cfzone, evsched_t *sch)
+{
+	if (!sch || !zone) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Fetch zone data. */
+	zonedata_t *zd = (zonedata_t *)zone->data;
+	if (!zd) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Cancel REFRESH timer. */
+	if (zd->xfr_in.timer) {
+		evsched_cancel(sch, zd->xfr_in.timer);
+		evsched_event_free(sch, zd->xfr_in.timer);
+		zd->xfr_in.timer = 0;
+	}
+
+	/* Cancel EXPIRE timer. */
+	if (zd->xfr_in.expire) {
+		evsched_cancel(sch, zd->xfr_in.expire);
+		evsched_event_free(sch, zd->xfr_in.expire);
+		zd->xfr_in.expire = 0;
+	}
+
+	/* Remove list of pending NOTIFYs. */
+	pthread_mutex_lock(&zd->lock);
+	notify_ev_t *ev = 0, *evn = 0;
+	WALK_LIST_DELSAFE(ev, evn, zd->notify_pending) {
+		zones_cancel_notify(zd, ev);
+	}
+	pthread_mutex_unlock(&zd->lock);
+
+	/* Check XFR/IN master server. */
+	if (zd->xfr_in.master.ptr) {
+
+		/* Schedule REFRESH timer. */
+		uint32_t refresh_tmr = 0;
+		if (knot_zone_contents(zone)) {
+			refresh_tmr = zones_soa_refresh(zone);
+		} else {
+			refresh_tmr = zd->xfr_in.bootstrap_retry;
+		}
+		zd->xfr_in.timer = evsched_schedule_cb(sch, zones_refresh_ev,
+							 zone, refresh_tmr);
+		dbg_zones("zone: REFRESH set to %u\n", refresh_tmr);
+	}
+
+	/* Schedule IXFR database syncing. */
+	/*! \todo Sync timer should not be reset after each xfr. */
+	int sync_timeout = cfzone->dbsync_timeout * 1000; /* Convert to ms. */
+	if (zd->ixfr_dbsync) {
+		evsched_cancel(sch, zd->ixfr_dbsync);
+		evsched_event_free(sch, zd->ixfr_dbsync);
+		zd->ixfr_dbsync = 0;
+	}
+	if (zd->ixfr_db) {
+		zd->ixfr_dbsync = evsched_schedule_cb(sch,
+		                                      zones_zonefile_sync_ev,
+		                                      zone, sync_timeout);
+	}
+
+	/* Do not issue NOTIFY queries if stub. */
+	if (!knot_zone_contents(zone)) {
+		conf_read_unlock();
+		return KNOTD_EOK;
+	}
+
+	/* Schedule NOTIFY to slaves. */
+	conf_remote_t *r = 0;
+	conf_read_lock();
+	WALK_LIST(r, cfzone->acl.notify_out) {
+
+		/* Fetch remote. */
+		conf_iface_t *cfg_if = r->remote;
+
+		/* Create request. */
+		notify_ev_t *ev = malloc(sizeof(notify_ev_t));
+		if (!ev) {
+			free(ev);
+			dbg_zones("notify: out of memory to create "
+				    "NOTIFY query for %s\n", cfg_if->name);
+			continue;
+		}
+
+		/* Parse server address. */
+		int ret = sockaddr_set(&ev->addr, cfg_if->family,
+				       cfg_if->address,
+				       cfg_if->port);
+		if (ret < 1) {
+			free(ev);
+			dbg_zones("notify: NOTIFY slave %s has invalid "
+				    "address\n", cfg_if->name);
+			continue;
+		}
+
+		/* Prepare request. */
+		ev->retries = cfzone->notify_retries + 1; /* first + N retries*/
+		ev->msgid = 0;
+		ev->zone = zone;
+		ev->timeout = cfzone->notify_timeout;
+
+		/* Schedule request (30 - 60s random delay). */
+		int tmr_s = 30 + (int)(30.0 * (rand() / (RAND_MAX + 1.0)));
+		pthread_mutex_lock(&zd->lock);
+		ev->timer = evsched_schedule_cb(sch, zones_notify_send, ev,
+						tmr_s * 1000);
+		add_tail(&zd->notify_pending, &ev->n);
+		pthread_mutex_unlock(&zd->lock);
+
+		log_server_info("Scheduled NOTIFY query after %d s to %s:%d\n",
+			    tmr_s, cfg_if->address, cfg_if->port);
+	}
+
+	conf_read_unlock();
+
+	return KNOTD_EOK;
+}
+
+int zones_cancel_notify(zonedata_t *zd, notify_ev_t *ev)
+{
+	if (!zd || !ev || !ev->timer) {
+		return KNOTD_EINVAL;
+	}
+
+	/* Wait for event to finish running. */
+#ifdef KNOTD_NOTIFY_DEBUG
+	int pkt_id = ev->msgid; /*< Do not optimize! */
+#endif
+	event_t *tmr = ev->timer;
+	ev->timer = 0;
+	pthread_mutex_unlock(&zd->lock);
+	evsched_cancel(tmr->parent, tmr);
+
+	/* Re-lock and find again (if not deleted). */
+	pthread_mutex_lock(&zd->lock);
+	int match_exists = 0;
+	notify_ev_t *tmpev = 0;
+	WALK_LIST(tmpev, zd->notify_pending) {
+		if (tmpev == ev) {
+			match_exists = 1;
+			break;
+		}
+	}
+
+	/* Event deleted before cancelled. */
+	if (!match_exists) {
+		dbg_notify("notify: NOTIFY event for query ID=%u was "
+		           "deleted before cancellation.\n",
+		           pkt_id);
+		return KNOTD_EOK;
+
+	}
+
+	/* Free event (won't be scheduled again). */
+	dbg_notify("notify: NOTIFY query ID=%u event cancelled.\n",
+	           pkt_id);
+	rem_node(&ev->n);
+	evsched_event_free(tmr->parent, tmr);
+	free(ev);
+	return KNOTD_EOK;
+}
diff --git a/src/knot/server/zones.h b/src/knot/server/zones.h
new file mode 100644
index 0000000..525a78a
--- /dev/null
+++ b/src/knot/server/zones.h
@@ -0,0 +1,264 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file zones.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * Contains functions for updating zone database from configuration.
+ *
+ * \addtogroup server
+ * @{
+ */
+
+#ifndef _KNOTD_ZONES_H_
+#define _KNOTD_ZONES_H_
+
+#include <stddef.h>
+
+#include "common/lists.h"
+#include "common/acl.h"
+#include "common/evsched.h"
+#include "libknot/nameserver/name-server.h"
+#include "libknot/zone/zonedb.h"
+#include "knot/conf/conf.h"
+#include "knot/server/notify.h"
+#include "knot/server/server.h"
+#include "knot/server/journal.h"
+#include "libknot/zone/zone.h"
+#include "libknot/updates/xfr-in.h"
+
+/* Constants. */
+#define SOA_QRY_TIMEOUT 10000 /*!< SOA query timeout (ms). */
+#define IXFR_DBSYNC_TIMEOUT (60*1000) /*!< Database sync timeout = 60s. */
+#define AXFR_BOOTSTRAP_RETRY (60*1000) /*!< Interval between AXFR BS retries. */
+
+/*!
+ * \brief Zone-related data.
+ */
+typedef struct zonedata_t
+{
+	/*! \brief Shortcut to zone config entry. */
+	conf_zone_t *conf;
+
+	/*! \brief Shortcut to server instance. */
+	server_t  *server;
+
+	/*! \brief Zone data lock for exclusive access. */
+	pthread_mutex_t lock;
+
+	/*! \brief Access control lists. */
+	acl_t *xfr_out;    /*!< ACL for xfr-out.*/
+	acl_t *notify_in;  /*!< ACL for notify-in.*/
+	acl_t *notify_out; /*!< ACL for notify-out.*/
+
+	/*! \brief XFR-IN scheduler. */
+	struct {
+		acl_t         *acl;      /*!< ACL for xfr-in.*/
+		sockaddr_t     master;   /*!< Master server for xfr-in.*/
+		knot_key_t    tsig_key;  /*!< Master TSIG key. */
+		struct event_t *timer;   /*!< Timer for REFRESH/RETRY. */
+		struct event_t *expire;  /*!< Timer for REFRESH. */
+		int next_id;             /*!< ID of the next awaited SOA resp.*/
+		pthread_mutex_t lock;    /*!< Pending XFR/IN lock. */
+		void           *wrkr;    /*!< Pending XFR/IN worker. */
+		uint32_t bootstrap_retry;/*!< AXFR/IN bootstrap retry. */
+	} xfr_in;
+
+	/*! \brief List of pending NOTIFY events. */
+	list notify_pending;
+
+	/*! \brief Zone IXFR history. */
+	journal_t *ixfr_db;
+	struct event_t *ixfr_dbsync;   /*!< Syncing IXFR db to zonefile. */
+	uint32_t zonefile_serial;
+} zonedata_t;
+
+/*!
+ * \brief Update zone database according to configuration.
+ *
+ * Creates a new database, copies references those zones from the old database
+ * which are still in the configuration, loads any new zones required and
+ * replaces the database inside the namserver.
+ *
+ * It also creates a list of deprecated zones that should be deleted once the
+ * function finishes.
+ *
+ * This function uses RCU mechanism to guard the access to the config and
+ * nameserver and to publish the new database in the nameserver.
+ *
+ * \param[in] conf Configuration.
+ * \param[in] ns Nameserver which holds the zone database.
+ * \param[out] db_old Old database, containing only zones which should be
+ *                    deleted afterwards.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_EINVAL
+ * \retval KNOTD_ERROR
+ */
+int zones_update_db_from_config(const conf_t *conf, knot_nameserver_t *ns,
+                               knot_zonedb_t **db_old);
+
+/*!
+ * \brief Sync zone data back to text zonefile.
+ *
+ * In case when SOA serial of the zonefile differs from the SOA serial of the
+ * loaded zone, zonefile needs to be updated.
+ *
+ * \note Current implementation rewrites the zone file.
+ *
+ * \param zone Evaluated zone.
+ *
+ * \retval KNOTD_EOK if successful.
+ * \retval KNOTD_EINVAL on invalid parameter.
+ * \retval KNOTD_ERROR on unspecified error during processing.
+ */
+int zones_zonefile_sync(knot_zone_t *zone);
+
+int zones_xfr_check_zone(knot_ns_xfr_t *xfr, knot_rcode_t *rcode);
+
+/*!
+ * \brief Processes normal response packet.
+ *
+ * \param nameserver Name server structure to provide the needed data.
+ * \param from Address of the response sender.
+ * \param packet Parsed response packet.
+ * \param response_wire Place for the response in wire format.
+ * \param rsize Input: maximum acceptable size of the response. Output: real
+ *              size of the response.
+ *
+ * \retval KNOTD_EOK if a valid response was created.
+ * \retval KNOTD_EINVAL on invalid parameters or packet.
+ * \retval KNOTD_EMALF if an error occured and the response is not valid.
+ */
+int zones_process_response(knot_nameserver_t *nameserver, 
+                           sockaddr_t *from,
+                           knot_packet_t *packet, uint8_t *response_wire,
+                           size_t *rsize);
+
+/*!
+ * \brief Decides what type of transfer should be used to update the given zone.
+ *
+ * \param nameserver Name server structure that uses the zone.
+ * \param zone Zone to be updated by the transfer.
+ *
+ * \retval
+ */
+knot_ns_xfr_type_t zones_transfer_to_use(const knot_zone_contents_t *zone);
+
+int zones_save_zone(const knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Name server config hook.
+ *
+ * Routine for dynamic name server reconfiguration.
+ *
+ * \param conf Current configuration.
+ * \param data Instance of the nameserver structure to update.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL
+ * \retval KNOTD_ERROR
+ */
+int zones_ns_conf_hook(const struct conf_t *conf, void *data);
+
+/*!
+ * \brief Store changesets in journal.
+ *
+ * Changesets will be stored on a permanent storage.
+ * Journal may be compacted, resulting in flattening changeset history.
+ *
+ * \param zone Zone associated with the changeset.
+ * \param src Changesets.
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_EAGAIN if journal needs to be synced with zonefile first.
+ *
+ * \todo Expects the xfr structure to be initialized in some way.
+ */
+int zones_store_changesets(knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Load changesets from journal.
+ *
+ * Changesets will be stored on a permanent storage.
+ * Journal may be compacted, resulting in flattening changeset history.
+ *
+ * In case of KNOTD_ERANGE error, whole zone content should be sent instead,
+ * as the changeset history cannot be recovered.
+ *
+ * \param zone Zone containing a changeset journal.
+ * \param dst Container to be loaded.
+ * \param from Starting SOA serial (oldest).
+ * \param to Ending SOA serial (newest).
+ *
+ * \retval KNOTD_EOK on success.
+ * \retval KNOTD_EINVAL on invalid parameters.
+ * \retval KNOTD_ERANGE when changeset history cannot be reconstructed.
+ *
+ * \todo Expects the xfr structure to be initialized in some way.
+ */
+int zones_xfr_load_changesets(knot_ns_xfr_t *xfr, uint32_t serial_from,
+                              uint32_t serial_to);
+
+/*!
+ * \brief Apply changesets to zone.
+ *
+ * Applies a list of XFR-style changesets to the given zone. Also checks if the
+ * changesets are applicable (i.e. zone is right and has the right serial).
+ *
+ * \param zone Zone to which the changesets should be applied.
+ * \param chsets Changesets to be applied to the zone.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_EINVAL
+ */
+int zones_apply_changesets(knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Update zone timers.
+ *
+ * REFRESH/RETRY/EXPIRE timers are updated according to SOA.
+ *
+ * \param sched Event scheduler.
+ * \param zone Related zone.
+ * \param cfzone Related zone contents. If NULL, configuration is
+ *               reused.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_EINVAL
+ * \retval KNOTD_ERROR
+ */
+int zones_timers_update(knot_zone_t *zone, conf_zone_t *cfzone, evsched_t *sch);
+
+/*!
+ * \brief Cancel pending NOTIFY timer.
+ *
+ * \warning Expects locked zonedata lock.
+ *
+ * \param zd Zone data.
+ * \param ev NOTIFY event.
+ *
+ * \retval KNOTD_EOK
+ * \retval KNOTD_ERROR
+ * \retval KNOTD_EINVAL
+ */
+int zones_cancel_notify(zonedata_t *zd, notify_ev_t *ev);
+
+#endif // _KNOTD_ZONES_H_
+
+/*! @} */
diff --git a/src/knot/stat/gatherer.c b/src/knot/stat/gatherer.c
new file mode 100644
index 0000000..e8048a1
--- /dev/null
+++ b/src/knot/stat/gatherer.c
@@ -0,0 +1,77 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <pthread.h>
+
+#include "knot/stat/stat-common.h"
+#include "common/slab/malloc.h"
+#include "knot/stat/gatherer.h"
+
+gatherer_t *new_gatherer()
+{
+	gatherer_t *ret;
+
+	if ((ret = malloc(sizeof(gatherer_t))) == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+        pthread_mutex_init(&ret->mutex_read, NULL);
+
+        /* TODO check success */
+
+	for (int i = 0; i < FREQ_BUFFER_SIZE; i++) {
+		ret->freq_array[i] = 0;
+		ret->flow_array[i] = NULL;
+	}
+
+	ret->qps = 0.0;
+	ret->udp_qps = 0.0;
+	ret->tcp_qps = 0.0;
+
+	/* CLEANUP */
+	/*  currently disabled */
+	/*  ret->mean_latency = 0.0;
+	    ret->udp_mean_latency = 0.0;
+	    ret->tcp_mean_latency = 0.0;
+
+	    ret->udp_latency = 0;
+	    ret->tcp_latency = 0; */
+
+	ret->udp_queries = 0;
+	ret->tcp_queries = 0;
+
+	return ret;
+}
+
+void gatherer_free(gatherer_t *gath)
+{
+	for (int i = 0; i < FREQ_BUFFER_SIZE; i++) {
+		if (gath->flow_array[i] != NULL) {
+			free(gath->flow_array[i]->addr);
+			free(gath->flow_array[i]);
+		}
+	}
+
+	pthread_mutex_destroy(&(gath->mutex_read));
+
+	pthread_cancel(gath->sleeper_thread);
+
+	pthread_join((gath->sleeper_thread), NULL);
+
+	free(gath);
+}
diff --git a/src/knot/stat/gatherer.h b/src/knot/stat/gatherer.h
new file mode 100644
index 0000000..62b3939
--- /dev/null
+++ b/src/knot/stat/gatherer.h
@@ -0,0 +1,110 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file gatherer.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Contains gatherer structure and its API.
+ * 
+ * \addtogroup statistics
+ * @{
+ */
+
+#ifndef _KNOTD_GATHERER_H_
+#define _KNOTD_GATHERER_H_
+
+#include <stdint.h>
+
+/* The bigger this number, the better the performance of hashing. */
+enum fbs { FREQ_BUFFER_SIZE = 100000 };
+
+/*!
+ * \brief Enum storing protocol codes.
+ */
+enum protocol {
+	stat_UDP,
+	stat_TCP
+};
+
+typedef enum protocol protocol_t;
+
+/*!
+ * \brief Structure used for backward mapping from a simple
+ *        hash back to string representation.
+ */
+struct flow_data {
+	char *addr; /*!< IP adress in string format (IP4 only at this time). */
+	uint16_t port; /*!< TCP/UDP port number. */
+	protocol_t protocol;
+};
+
+typedef struct flow_data flow_data_t;
+
+/*!
+ * \brief Gatherer structure, used for gathering statistics from 
+ *        multiple threads.
+ */
+struct gatherer {
+	pthread_mutex_t mutex_read; /*!< Mutex used when reading values. */
+	double qps; /*!< Queries per second. */
+	double udp_qps; /*!< Queries per second - UDP. */
+	double tcp_qps; /*!< Queries per second - TCP. */
+
+        /*!< \note latency currently disabled */
+	/*  double mean_latency;
+	    double udp_mean_latency;
+	    double tcp_mean_latency;
+	    unsigned udp_latency;
+	    unsigned tcp_latency; */
+
+	unsigned udp_queries; /*!< Total number of UDP queries for SLEEP_TIME. */
+	unsigned tcp_queries; /*!< Total number of TCP queries for SLEEP_TIME. */
+	/*!
+	 * \brief this variable should be much bigger, preferably sparse array
+	 *        with 2**32 elements (for IPv4). It is an array with query
+	 *        query frequencies.
+	 */
+	unsigned freq_array[FREQ_BUFFER_SIZE];
+	/*!
+	 * \brief Used for backward mapping.
+	 */
+	flow_data_t *flow_array[FREQ_BUFFER_SIZE];
+	/*!
+	 * \brief Thread used for computation of statistics.
+	 */
+	pthread_t sleeper_thread;
+};
+
+typedef struct gatherer gatherer_t;
+
+/*!
+ * \brief Creates a new gatherer instance.
+ *
+ * \return Pointer to created structure, NULL otherwise.
+ */
+gatherer_t *new_gatherer();
+
+/*!
+ * \brief Frees a gatherer instance.
+ *
+ * \param gatherer Gatherer instance to be freed.
+ */
+void gatherer_free(gatherer_t *gatherer);
+
+#endif /* _KNOTD_STAT_GATHERER_H_ */
+
+/*! @} */
diff --git a/src/knot/stat/stat-common.h b/src/knot/stat/stat-common.h
new file mode 100644
index 0000000..032e32b
--- /dev/null
+++ b/src/knot/stat/stat-common.h
@@ -0,0 +1,46 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file stat-common.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Common macros for stat.
+ *
+ * \addtogroup statistics
+ * @{
+ */
+
+#ifndef _KNOTD_STAT_COMMON_H_
+#define _KNOTD_STAT_COMMON_H_
+
+#include <stdio.h>
+
+//#define STAT_COMPILE
+#define ST_DEBUG
+
+#define ERR_ALLOC_FAILED fprintf(stderr, "Allocation failed at %s:%d\n", \
+				  __FILE__, __LINE__)
+
+#ifdef ST_DEBUG
+#define dbg_st(msg...) fprintf(stderr, msg)
+#else
+#define dbg_st(msg...)
+#endif
+
+#endif /* _KNOTD_STAT_COMMON_H_ */
+
+/*! @} */
diff --git a/src/knot/stat/stat.c b/src/knot/stat/stat.c
new file mode 100644
index 0000000..a473085
--- /dev/null
+++ b/src/knot/stat/stat.c
@@ -0,0 +1,270 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <time.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "knot/stat/stat-common.h"
+#include "knot/stat/stat.h"
+#include "knot/stat/gatherer.h"
+
+#ifdef STAT_COMPILE
+
+/* Static local gatherer variable, to be used with all functions. */
+static gatherer_t *local_gath;
+
+/* CLEANUP */
+/*
+static void stat_inc_latency( stat_t *stat, uint increment )
+{
+	if (stat->protocol==stat_UDP) {
+		local_gath->udp_latency+=increment;
+	} else {
+		local_gath->tcp_latency+=increment;
+	}
+}*/
+/*
+static uint stat_last_query_time( stat_t *stat )
+{
+	return (stat->t2).tv_nsec-(stat->t1).tv_nsec;
+}*/
+
+/*!
+ * \brief Increases query count in the local data gatherer.
+ *
+ * \param stat Current stat instance.
+ */
+static void stat_inc_query(stat_t *stat)
+{
+	if (stat->protocol == stat_UDP) {
+		local_gath->udp_queries++;
+	} else {
+		local_gath->tcp_queries++;
+	}
+}
+
+/*!
+ * \brief Calculates very simple hash from IPv4 address and returns index to
+ *        array.
+ *
+ * \param s_addr Socket address structure.
+ * \param protocol Used protocol.
+ *
+ * \return uint Calculated index.
+ */
+static uint return_index(struct sockaddr_in *s_addr , protocol_t protocol)
+{
+	/* TODO IPv6 */
+	/* This is the first "hash" I could think of quickly. */
+	uint ret = 0;
+
+	char str[24];
+	inet_ntop(AF_INET, &s_addr->sin_addr, str, 24);
+
+	for (int i = 0; i < strlen(str); i++) {
+		if (str[i] != '.') {
+			ret += str[i];
+			ret *= (i + 1);
+		}
+	}
+
+	ret += s_addr->sin_port * 7;
+	if (protocol == stat_UDP) {
+		ret *= 3;
+	} else {
+		ret *= 7;
+	}
+	ret %= FREQ_BUFFER_SIZE;
+	/* Effectively uses only end of the hash, maybe hash the
+	 * resulting number once again to get 0 <= n < 10000. */
+	return ret;
+}
+
+/*!
+ * \brief Adds data to local gatherer structure.
+ *
+ * \param stat Current stat variable.
+ *
+ * \retval 0 on success.
+ * \retval -1 on memory error.
+ */
+static int stat_gatherer_add_data(stat_t *stat)
+{
+	/* TODO IPv6*/
+	uint index = return_index(stat->s_addr, stat->protocol);
+	if (!local_gath->freq_array[index]) {
+		char addr[24];
+		inet_ntop(AF_INET, &stat->s_addr->sin_addr, addr, 24);
+		flow_data_t *tmp;
+		tmp = malloc(sizeof(flow_data_t));
+		if (tmp == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+		tmp->addr = malloc(sizeof(char) * 24);
+		if (tmp->addr == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+		strcpy(tmp->addr, addr);
+		tmp->port = stat->s_addr->sin_port;
+		tmp->protocol = stat->protocol;
+		local_gath->flow_array[index] = tmp;
+	}
+
+	//TODO add a check here, whether hashing fction performs well enough
+
+	local_gath->freq_array[index] += 1;
+
+	return 0;
+}
+
+/*!
+ * \brief Resets logging array.
+ */
+static void stat_reset_gatherer_array()
+{
+	for (int i = 0; i < FREQ_BUFFER_SIZE; i++) {
+		local_gath->freq_array[i] = 0;
+	}
+}
+
+/*!
+ * \brief Sleeps for given time and then runs all the computations,
+ *        results of which are stored in local gatherer.
+ */
+static void stat_sleep_compute()
+{
+	while (1) {
+		sleep(SLEEP_TIME);
+
+		for (int i = 0; i < FREQ_BUFFER_SIZE; i++) {
+			if (local_gath->freq_array[i] >
+			    ACTIVE_FLOW_THRESHOLD) {
+				dbg_st("too much activity at index %d:"
+					 " %d queries adress: %s port %d"
+					 " protocol %d\n",
+					 i, local_gath->freq_array[i],
+					 local_gath->flow_array[i]->addr,
+					 local_gath->flow_array[i]->port,
+					 local_gath->flow_array[i]->protocol);
+			}
+		}
+
+		pthread_mutex_lock(&(local_gath->mutex_read));
+
+		local_gath->udp_qps = local_gath->udp_queries /
+				      (double)SLEEP_TIME;
+		local_gath->tcp_qps = local_gath->tcp_queries /
+				      (double)SLEEP_TIME;
+		local_gath->qps = local_gath->udp_qps + local_gath->tcp_qps;
+
+		/* following code needs usage of
+		 * gettimeofday, which is currently disabled */
+		/* CLEANUP */
+/*		local_gath->udp_mean_latency=((double)local_gath->udp_latency/
+		(double)local_gath->udp_queries);
+		local_gath->tcp_mean_latency=((double)local_gath->tcp_latency/
+		(double)local_gath->tcp_queries);
+		local_gath->mean_latency = (local_gath->udp_mean_latency +
+		local_gath->tcp_mean_latency)/2; */
+
+		local_gath->udp_queries = 0;
+		local_gath->tcp_queries = 0;
+
+		/* same thing as above applies here */
+
+/*		local_gath->tcp_latency = 0;
+		local_gath->udp_latency = 0; */
+
+		pthread_mutex_unlock(&(local_gath->mutex_read));
+
+		stat_reset_gatherer_array(local_gath);
+
+		dbg_st("qps_udp: %f\n", local_gath->udp_qps);
+/*		dbg_st("mean_lat_udp: %f\n", local_gath->udp_mean_latency); */
+
+		dbg_st("qps_tcp: %f\n", local_gath->tcp_qps);
+/*		dbg_st("mean_lat_tcp: %f\n", local_gath->tcp_mean_latency); */
+
+		dbg_st("UDP/TCP ratio %f\n",
+			 local_gath->udp_qps / local_gath->tcp_qps);
+	}
+}
+
+stat_t *stat_new()
+{
+	stat_t *ret;
+
+	if ((ret = malloc(sizeof(stat_t))) == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	return ret;
+}
+
+void stat_set_protocol(stat_t *stat, int protocol)
+{
+	stat->protocol = protocol;
+}
+
+void stat_get_first(stat_t *stat , struct sockaddr_in *s_addr)
+{
+	/* CLEANUP */
+//	gettimeofday(&stat->t2, NULL);
+	stat->s_addr = s_addr;
+//	check if s_addr does not get overwritten
+}
+
+void stat_get_second(stat_t *stat)
+{
+	/* CLEANUP */
+//	gettimeofday(&stat->t2, NULL);
+	stat_inc_query(stat);
+//	stat_inc_latency(stat, stat_last_query_time(stat));
+	stat_gatherer_add_data(stat);
+}
+
+void stat_free(stat_t *stat)
+{
+	free(stat);
+}
+
+void stat_static_gath_init()
+{
+	local_gath = new_gatherer();
+}
+
+void stat_static_gath_start()
+{
+	pthread_create(&(local_gath->sleeper_thread), NULL,
+		       (void *) &stat_sleep_compute, NULL);
+}
+
+void stat_static_gath_free()
+{
+	gatherer_free(local_gath);
+}
+
+#endif /* STAT_COMPILE */
diff --git a/src/knot/stat/stat.h b/src/knot/stat/stat.h
new file mode 100644
index 0000000..a82f130
--- /dev/null
+++ b/src/knot/stat/stat.h
@@ -0,0 +1,157 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file stat.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Contains statistics structure and its API.
+ *
+ * \addtogroup statistics
+ * @{
+ */
+
+#ifndef _KNOTD_STAT_H_
+#define _KNOTD_STAT_H_
+
+#include <time.h>
+#include <stdbool.h>
+#include <pthread.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include "knot/stat/gatherer.h"
+
+#ifdef STAT_COMPILE
+#define STAT_INIT(x) x = stat_new()
+#else
+#define STAT_INIT(x) x = NULL //UNUSED(x)
+#endif /* STAT_COMPILE */
+
+/* Determines how long until the sleeper thread
+ * wakes up and runs computations.
+ */
+static uint const SLEEP_TIME = 15;
+
+/* Sets threshold for active flow detection, will
+ * probably have to be changed. */
+static uint const ACTIVE_FLOW_THRESHOLD = 10;
+
+/*!
+ * \brief Statistics structure, unique for each UDP/TCP thread.
+ */
+struct stat_stat {
+//	struct timespec t1, t2; /* Currently disabled */
+	protocol_t protocol; /*!< Flags. */
+	struct sockaddr_in *s_addr;
+//  gatherer_t *gatherer; / * not needed when using static gatherer. */
+};
+
+typedef struct stat_stat stat_t;
+
+/*!
+ * \brief Creates new stat_t structure.
+ *
+ * \return Newly allocated and initialized stat structure, NULL on errror.
+ */
+#ifdef STAT_COMPILE
+stat_t *stat_new();
+#else
+inline stat_t *stat_new()
+{
+	return NULL;
+}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Sets a protocol for stat_t structure. Options are stat_UDP, stat_TCP.
+ *
+ * \param stat Stat_t instance (usually newly created).
+ * \param protocol Protocol to be assigned to stat structure.
+ */
+#ifdef STAT_COMPILE
+void stat_set_protocol(stat_t *stat, int protocol);
+#else
+static inline void stat_set_protocol(stat_t *stat, int protocol) {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Gets the time from a processing function.
+ *
+ * \param stat  Current instance of stat_t.
+ * \param s_addr Sockaddr structure to be used later for statistics.
+ */
+#ifdef STAT_COMPILE
+#warning "stat fixme: pass sockaddr* for generic _in and _in6 support"
+void stat_get_first(stat_t *stat, struct sockaddr_in *s_addr);
+#else
+static inline void stat_get_first(stat_t *stat, struct sockaddr *s_addr) {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Gets time from a processing fuction and changes
+ *        the corresponding variables.
+ *
+ * \param stat Current stat_t instance.
+ */
+#ifdef STAT_COMPILE
+void stat_get_second(stat_t *stat);
+#else
+static inline void stat_get_second(stat_t *stat) {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Frees stat_t structure.
+ *
+ * \param stat Pointer to stat structure to be deallocated.
+ */
+#ifdef STAT_COMPILE
+void stat_free(stat_t *stat);
+#else
+static inline void stat_free(stat_t *stat) {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Initializes static gatherer.
+ */
+#ifdef STAT_COMPILE
+void stat_static_gath_init();
+#else
+static inline void stat_static_gath_init() {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Starts static gatherer's sleeper thread.
+ */
+#ifdef STAT_COMPILE
+void stat_static_gath_start();
+#else
+static inline void stat_static_gath_start() {}
+#endif /* STAT_COMPILE */
+
+/*!
+ * \brief Frees static gatherer, calls gatherer_free().
+ */
+#ifdef STAT_COMPILE
+void stat_static_gath_free();
+#else
+static inline void stat_static_gath_free() {}
+#endif /* STAT_COMPILE */
+
+#endif /* _KNOTD_STAT_H_ */
+
+/*! @} */
diff --git a/src/knot/zone/zone-dump-text.c b/src/knot/zone/zone-dump-text.c
new file mode 100644
index 0000000..f7899a1
--- /dev/null
+++ b/src/knot/zone/zone-dump-text.c
@@ -0,0 +1,1083 @@
+/*!
+ * \file zone-dump-text.c
+ *
+ * \author modifications (non-buffer implementation, zone-specific functions)
+ *         by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         conversion functions by NLnet Labs,
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *         b64ntop by ISC.
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+#include <assert.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "libknot/libknot.h"
+#include "libknot/common.h"
+#include "common/skip-list.h"
+#include "common/base32hex.h"
+
+/* TODO max length of alg */
+
+enum uint_max_length {
+	U8_MAX_STR_LEN = 4, U16_MAX_STR_LEN = 6,
+	U32_MAX_STR_LEN = 11, MAX_RR_TYPE_LEN = 20,
+	MAX_NSEC_BIT_STR_LEN = 4096,
+	};
+
+#define APL_NEGATION_MASK      0x80U
+#define APL_LENGTH_MASK	       (~APL_NEGATION_MASK)
+
+/* RFC 4025 - codes for different types that IPSECKEY can hold. */
+#define IPSECKEY_NOGATEWAY 0
+#define IPSECKEY_IP4 1
+#define IPSECKEY_IP6 2
+#define IPSECKEY_DNAME 3
+
+/* Following copyrights are only valid for b64_ntop function */
+/*
+ * Copyright (c) 1996, 1998 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/*
+ * Portions Copyright (c) 1995 by International Business Machines, Inc.
+ *
+ * International Business Machines, Inc. (hereinafter called IBM) grants
+ * permission under its copyrights to use, copy, modify, and distribute this
+ * Software with or without fee, provided that the above copyright notice and
+ * all paragraphs of this notice appear in all copies, and that the name of IBM
+ * not be used in connection with the marketing of any product incorporating
+ * the Software or modifications thereof, without specific, written prior
+ * permission.
+ *
+ * To the extent it has a right to do so, IBM grants an immunity from suit
+ * under its patents, if any, for the use, sale or manufacture of products to
+ * the extent that such products are used for performing Domain Name System
+ * dynamic updates in TCP/IP networks by means of the Software.  No immunity is
+ * granted for any product per se or for any other function of any product.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
+ * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
+ * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define Assert(Cond) if (!(Cond)) abort()
+
+static const char Base64[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char Pad64 = '=';
+
+/* (From RFC1521 and draft-ietf-dnssec-secext-03.txt)
+   The following encoding technique is taken from RFC 1521 by Borenstein
+   and Freed.  It is reproduced here in a slightly edited form for
+   convenience.
+
+   A 65-character subset of US-ASCII is used, enabling 6 bits to be
+   represented per printable character. (The extra 65th character, "=",
+   is used to signify a special processing function.)
+
+   The encoding process represents 24-bit groups of input bits as output
+   strings of 4 encoded characters. Proceeding from left to right, a
+   24-bit input group is formed by concatenating 3 8-bit input groups.
+   These 24 bits are then treated as 4 concatenated 6-bit groups, each
+   of which is translated into a single digit in the base64 alphabet.
+
+   Each 6-bit group is used as an index into an array of 64 printable
+   characters. The character referenced by the index is placed in the
+   output string.
+
+                         Table 1: The Base64 Alphabet
+
+      Value Encoding  Value Encoding  Value Encoding  Value Encoding
+          0 A            17 R            34 i            51 z
+          1 B            18 S            35 j            52 0
+          2 C            19 T            36 k            53 1
+          3 D            20 U            37 l            54 2
+          4 E            21 V            38 m            55 3
+          5 F            22 W            39 n            56 4
+          6 G            23 X            40 o            57 5
+          7 H            24 Y            41 p            58 6
+          8 I            25 Z            42 q            59 7
+          9 J            26 a            43 r            60 8
+         10 K            27 b            44 s            61 9
+         11 L            28 c            45 t            62 +
+         12 M            29 d            46 u            63 /
+         13 N            30 e            47 v
+         14 O            31 f            48 w         (pad) =
+         15 P            32 g            49 x
+         16 Q            33 h            50 y
+
+   Special processing is performed if fewer than 24 bits are available
+   at the end of the data being encoded.  A full encoding quantum is
+   always completed at the end of a quantity.  When fewer than 24 input
+   bits are available in an input group, zero bits are added (on the
+   right) to form an integral number of 6-bit groups.  Padding at the
+   end of the data is performed using the '=' character.
+
+   Since all base64 input is an integral number of octets, only the
+         -------------------------------------------------
+   following cases can arise:
+
+       (1) the final quantum of encoding input is an integral
+           multiple of 24 bits; here, the final unit of encoded
+	   output will be an integral multiple of 4 characters
+	   with no "=" padding,
+       (2) the final quantum of encoding input is exactly 8 bits;
+           here, the final unit of encoded output will be two
+	   characters followed by two "=" padding characters, or
+       (3) the final quantum of encoding input is exactly 16 bits;
+           here, the final unit of encoded output will be three
+	   characters followed by one "=" padding character.
+   */
+
+int b64_ntop(uint8_t const *src, size_t srclength, char *target,
+	     size_t targsize) {
+	size_t datalength = 0;
+	uint8_t input[3];
+	uint8_t output[4];
+	size_t i;
+
+	while (2 < srclength) {
+		input[0] = *src++;
+		input[1] = *src++;
+		input[2] = *src++;
+		srclength -= 3;
+
+		output[0] = input[0] >> 2;
+		output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
+		output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
+		output[3] = input[2] & 0x3f;
+		Assert(output[0] < 64);
+		Assert(output[1] < 64);
+		Assert(output[2] < 64);
+		Assert(output[3] < 64);
+
+		if (datalength + 4 > targsize)
+			return (-1);
+		target[datalength++] = Base64[output[0]];
+		target[datalength++] = Base64[output[1]];
+		target[datalength++] = Base64[output[2]];
+		target[datalength++] = Base64[output[3]];
+	}
+
+	/* Now we worry about padding. */
+	if (0 != srclength) {
+		/* Get what's left. */
+		input[0] = input[1] = input[2] = '\0';
+		for (i = 0; i < srclength; i++)
+			input[i] = *src++;
+
+		output[0] = input[0] >> 2;
+		output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
+		output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
+		Assert(output[0] < 64);
+		Assert(output[1] < 64);
+		Assert(output[2] < 64);
+
+		if (datalength + 4 > targsize)
+			return (-1);
+		target[datalength++] = Base64[output[0]];
+		target[datalength++] = Base64[output[1]];
+		if (srclength == 1)
+			target[datalength++] = Pad64;
+		else
+			target[datalength++] = Base64[output[2]];
+		target[datalength++] = Pad64;
+	}
+	if (datalength >= targsize)
+		return (-1);
+	target[datalength] = '\0';	/* Returned value doesn't count \0. */
+	return (datalength);
+}
+
+/* Taken from RFC 4398, section 2.1.  */
+knot_lookup_table_t knot_dns_certificate_types[] = {
+/*	0		Reserved */
+	{ 1, "PKIX" },	/* X.509 as per PKIX */
+	{ 2, "SPKI" },	/* SPKI cert */
+	{ 3, "PGP" },	/* OpenPGP packet */
+	{ 4, "IPKIX" },	/* The URL of an X.509 data object */
+	{ 5, "ISPKI" },	/* The URL of an SPKI certificate */
+	{ 6, "IPGP" },	/* The fingerprint and URL of an OpenPGP packet */
+	{ 7, "ACPKIX" },	/* Attribute Certificate */
+	{ 8, "IACPKIX" },	/* The URL of an Attribute Certificate */
+	{ 253, "URI" },	/* URI private */
+	{ 254, "OID" },	/* OID private */
+/*	255 		Reserved */
+/* 	256-65279	Available for IANA assignment */
+/*	65280-65534	Experimental */
+/*	65535		Reserved */
+	{ 0, NULL }
+};
+
+/* Taken from RFC 2535, section 7.  */
+knot_lookup_table_t knot_dns_algorithms[] = {
+	{ 1, "RSAMD5" },	/* RFC 2537 */
+	{ 2, "DH" },		/* RFC 2539 */
+	{ 3, "DSA" },		/* RFC 2536 */
+	{ 4, "ECC" },
+	{ 5, "RSASHA1" },	/* RFC 3110 */
+	{ 252, "INDIRECT" },
+	{ 253, "PRIVATEDNS" },
+	{ 254, "PRIVATEOID" },
+	{ 0, NULL }
+};
+
+static int get_bit(uint8_t bits[], size_t index)
+{
+	/*
+	 * The bits are counted from left to right, so bit #0 is the
+	 * left most bit.
+	 */
+	return bits[index / 8] & (1 << (7 - index % 8));
+}
+
+static inline uint8_t * rdata_item_data(knot_rdata_item_t item)
+{
+	return (uint8_t *)(item.raw_data + 1);
+}
+
+static inline uint16_t rdata_item_size(knot_rdata_item_t item)
+{
+	return item.raw_data[0];
+}
+
+char *rdata_dname_to_string(knot_rdata_item_t item)
+{
+	return knot_dname_to_str(item.dname);
+}
+
+char *rdata_dns_name_to_string(knot_rdata_item_t item)
+{
+	return knot_dname_to_str(item.dname);
+}
+
+static char *rdata_txt_data_to_string(const uint8_t *data)
+{
+	uint8_t length = data[0];
+	size_t i;
+
+	if (length == 0) {
+		return NULL;
+	}
+
+	/*
+	 * 3 because: opening '"', closing '"', and \0 at the end.
+	 * Times 2 because string can be all "double chars".
+	 */
+	size_t current_length = sizeof(char) * (length * 2 + 3);
+	char *ret = malloc(current_length);
+	if (ret == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	memset(ret, 0, sizeof(char) * (length * 2 + 3));
+
+
+	strcat(ret, "\"");
+
+	for (i = 1; i <= length; i++) {
+		char ch = (char) data[i];
+		if (isprint((int)ch)) {
+			if (ch == '"' || ch == '\\') {
+				strcat(ret, "\"");
+			}
+				/* for the love of god, how to this better,
+				   but w/o obscure self-made functions */
+				char tmp_str[2];
+				tmp_str[0] = ch;
+				tmp_str[1] = 0;
+				strcat(ret, tmp_str);
+		} else {
+			strcat(ret, "\\");
+			char tmp_str[2];
+			tmp_str[0] = ch - '0';
+			tmp_str[1] = 0;
+
+			strcat(ret, tmp_str);
+		}
+	}
+	strcat(ret, "\"");
+
+	return ret;
+}
+
+char *rdata_text_to_string(knot_rdata_item_t item)
+{
+	uint16_t size = item.raw_data[0];
+	char *ret = malloc(sizeof(char) * size * 2) ;
+	if (ret == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	memset(ret, 0, sizeof(char) * size);
+	const uint8_t *data = (uint8_t *)(item.raw_data +  1);
+	size_t read_count = 0;
+	while (read_count < size) {
+		assert(read_count <= size);
+		char *txt = rdata_txt_data_to_string(data + read_count);
+		if (txt == NULL) {
+			free(ret);
+			return NULL;
+		}
+		read_count += strlen(txt) - 1;
+		/* Create delimiter. */
+		char del[2];
+		del[0] = ' ';
+		del[1] = '\0';
+		strcat(ret, txt);
+		strcat(ret, del);
+		free(txt);
+	}
+
+	return ret;
+}
+
+char *rdata_byte_to_string(knot_rdata_item_t item)
+{
+	assert(item.raw_data[0] == 1);
+	uint8_t data = item.raw_data[1];
+	char *ret = malloc(sizeof(char) * U8_MAX_STR_LEN);
+	snprintf(ret, U8_MAX_STR_LEN, "%d", (char) data);
+	return ret;
+}
+
+char *rdata_short_to_string(knot_rdata_item_t item)
+{
+	uint16_t data = knot_wire_read_u16(rdata_item_data(item));
+	char *ret = malloc(sizeof(char) * U16_MAX_STR_LEN);
+	snprintf(ret, U16_MAX_STR_LEN, "%u", data);
+	/* XXX Use proper macros - see response tests*/
+	/* XXX check return value, return NULL on failure */
+	return ret;
+}
+
+char *rdata_long_to_string(knot_rdata_item_t item)
+{
+	uint32_t data = knot_wire_read_u32(rdata_item_data(item));
+	char *ret = malloc(sizeof(char) * U32_MAX_STR_LEN);
+	/* u should be enough */
+	snprintf(ret, U32_MAX_STR_LEN, "%u", data);
+	return ret;
+}
+
+char *rdata_a_to_string(knot_rdata_item_t item)
+{
+	/* 200 seems like a little too much */
+	char *ret = malloc(sizeof(char) * 200);
+	if (inet_ntop(AF_INET, rdata_item_data(item), ret, 200)) {
+		return ret;
+	} else {
+		return NULL;
+	}
+}
+
+char *rdata_aaaa_to_string(knot_rdata_item_t item)
+{
+	char *ret = malloc(sizeof(char) * 200);
+	if (inet_ntop(AF_INET6, rdata_item_data(item), ret, 200)) {
+		return ret;
+	} else {
+		return NULL;
+	}
+}
+
+char *rdata_rrtype_to_string(knot_rdata_item_t item)
+{
+	uint16_t type = knot_wire_read_u16(rdata_item_data(item));
+	const char *tmp = knot_rrtype_to_string(type);
+	char *ret = malloc(sizeof(char) * MAX_RR_TYPE_LEN);
+	strncpy(ret, tmp, MAX_RR_TYPE_LEN);
+	return ret;
+}
+
+char *rdata_algorithm_to_string(knot_rdata_item_t item)
+{
+	uint8_t id = *rdata_item_data(item);
+	char *ret = malloc(sizeof(char) * MAX_RR_TYPE_LEN);
+	knot_lookup_table_t *alg
+		= knot_lookup_by_id(knot_dns_algorithms, id);
+	if (alg) {
+		strncpy(ret, alg->name, MAX_RR_TYPE_LEN);
+	} else {
+		snprintf(ret, U8_MAX_STR_LEN, "%u", id);
+	}
+
+	return ret;
+}
+
+char *rdata_certificate_type_to_string(knot_rdata_item_t item)
+{
+	uint16_t id = knot_wire_read_u16(rdata_item_data(item));
+	char *ret = malloc(sizeof(char) * MAX_RR_TYPE_LEN);
+	knot_lookup_table_t *type
+		= knot_lookup_by_id(knot_dns_certificate_types, id);
+	if (type) {
+		strncpy(ret, type->name, MAX_RR_TYPE_LEN);
+	} else {
+		snprintf(ret, U16_MAX_STR_LEN, "%u", id);
+	}
+
+	return ret;
+}
+
+char *rdata_period_to_string(knot_rdata_item_t item)
+{
+	/* uint32 but read 16 XXX */
+	uint32_t period = knot_wire_read_u32(rdata_item_data(item));
+	char *ret = malloc(sizeof(char) * U32_MAX_STR_LEN);
+	snprintf(ret, U32_MAX_STR_LEN, "%u", period);
+	return ret;
+}
+
+char *rdata_time_to_string(knot_rdata_item_t item)
+{
+	time_t time = (time_t) knot_wire_read_u32(rdata_item_data(item));
+	struct tm tm_conv;
+	if (gmtime_r(&time, &tm_conv) == 0) {
+		return 0;
+	}
+	char *ret = malloc(sizeof(char) * 15);
+	if (strftime(ret, 15, "%Y%m%d%H%M%S", &tm_conv)) {
+		return ret;
+	} else {
+		free(ret);
+		return 0;
+	}
+}
+
+char *rdata_base32_to_string(knot_rdata_item_t item)
+{
+	int length;
+	size_t size = rdata_item_size(item);
+	if (size == 0) {
+		char *ret = malloc(sizeof(char) * 2);
+		ret[0] = '-';
+		ret[1] = '\0';
+		return ret;
+	}
+
+	size -= 1; // remove length byte from count
+	char *ret = NULL;
+	length = base32hex_encode_alloc((char *)rdata_item_data(item) + 1,
+	                                size, &ret);
+	if (length > 0) {
+		return ret;
+	} else {
+		free(ret);
+		return NULL;
+	}
+}
+
+char *rdata_base64_to_string(knot_rdata_item_t item)
+{
+	int length;
+	size_t size = rdata_item_size(item);
+	char *ret = malloc((sizeof(char) * 2 * size) + 1 * sizeof(char));
+	length = b64_ntop(rdata_item_data(item), size,
+			  ret, (sizeof(char)) * (size * 2 + 1));
+	if (length > 0) {
+		return ret;
+	} else {
+		free(ret);
+		return NULL;
+	}
+}
+
+char *hex_to_string(const uint8_t *data, size_t size)
+{
+	static const char hexdigits[] = {
+		'0', '1', '2', '3', '4', '5', '6', '7',
+		'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+	};
+	size_t i;
+
+	char *ret = malloc(sizeof(char) * (size * 2 + 1));
+
+	for (i = 0; i < size * 2; i += 2) {
+		uint8_t octet = *data++;
+		ret[i] = hexdigits [octet >> 4];
+		ret[i + 1] = hexdigits [octet & 0x0f];
+	}
+
+	ret[i] = '\0';
+
+	return ret;
+}
+
+char *rdata_hex_to_string(knot_rdata_item_t item)
+{
+	return hex_to_string(rdata_item_data(item), rdata_item_size(item));
+}
+
+char *rdata_hexlen_to_string(knot_rdata_item_t item)
+{
+	if(rdata_item_size(item) <= 1) {
+		// NSEC3 salt hex can be empty
+		char *ret = malloc(sizeof(char) * 2);
+		ret[0] = '-';
+		ret[1] = '\0';
+		return ret;
+	} else {
+		return hex_to_string(rdata_item_data(item) + 1,
+		                     rdata_item_size(item) - 1);
+	}
+}
+
+char *rdata_nsap_to_string(knot_rdata_item_t item)
+{
+	char *ret = malloc(sizeof(char) * (rdata_item_size(item) + 3));
+	memcpy(ret, "0x", strlen("0x"));
+	char *converted = hex_to_string(rdata_item_data(item),
+	                                rdata_item_size(item));
+	strcat(ret, converted);
+	free(converted);
+	return ret;
+}
+
+char *rdata_apl_to_string(knot_rdata_item_t item)
+{
+	uint8_t *data = rdata_item_data(item);
+	uint16_t address_family = knot_wire_read_u16(data);
+	uint8_t prefix = data[2];
+	uint8_t length = data[3];
+	int negated = length & APL_NEGATION_MASK;
+	int af = -1;
+
+	char *ret = malloc(sizeof(char) * MAX_NSEC_BIT_STR_LEN);
+
+	memset(ret, 0, MAX_NSEC_BIT_STR_LEN);
+
+	length &= APL_LENGTH_MASK;
+	switch (address_family) {
+		case 1: af = AF_INET; break;
+		case 2: af = AF_INET6; break;
+	}
+
+	if (af != -1) {
+		char text_address[1000];
+		uint8_t address[128];
+		memset(address, 0, sizeof(address));
+		memcpy(address, data + 4, length);
+		if (inet_ntop(af, address,
+			      text_address,
+			      sizeof(text_address))) {
+			snprintf(ret, sizeof(text_address) +
+				 U32_MAX_STR_LEN * 2,
+				 "%s%d:%s/%d",
+				 negated ? "!" : "",
+				 (int) address_family,
+				 text_address,
+				 (int) prefix);
+		}
+	}
+
+	return ret;
+
+		/*
+	int result = 0;
+	buffer_type packet;
+
+	buffer_create_from(
+		&packet, rdata_item_data(rdata), rdata_atom_size(rdata));
+
+	if (buffer_available(&packet, 4)) {
+		uint16_t address_family = buffer_read_u16(&packet);
+		uint8_t prefix = buffer_read_u8(&packet);
+		uint8_t length = buffer_read_u8(&packet);
+		int negated = length & APL_NEGATION_MASK;
+		int af = -1;
+
+		length &= APL_LENGTH_MASK;
+		switch (address_family) {
+		case 1: af = AF_INET; break;
+		*case 2: af = AF_INET6; break;
+		}
+		if (af != -1 && buffer_available(&packet, length)) {
+			char text_address[1000];
+			uint8_t address[128];
+			memset(address, 0, sizeof(address));
+			buffer_read(&packet, address, length);
+			if (inet_ntop(af, address, text_address,
+			    sizeof(text_address))) {
+				buffer_printf(output, "%s%d:%s/%d",
+					      negated ? "!" : "",
+					      (int) address_family,
+					      text_address,
+					      (int) prefix);
+				result = 1;
+			}
+		}
+	}
+	return result;
+	*/
+
+
+}
+
+char *rdata_services_to_string(knot_rdata_item_t item)
+{
+	uint8_t *data = rdata_item_data(item);
+	uint8_t protocol_number = data[0];
+	ssize_t bitmap_size = rdata_item_size(item) - 1;
+	uint8_t *bitmap = data + 1;
+	struct protoent *proto = getprotobynumber(protocol_number);
+
+	char *ret = malloc(sizeof(char) * MAX_NSEC_BIT_STR_LEN);
+
+	memset(ret, 0, MAX_NSEC_BIT_STR_LEN);
+
+	if (proto) {
+		int i;
+
+		strcpy(ret, proto->p_name);
+
+		strcat(ret, " ");
+
+		for (i = 0; i < bitmap_size * 8; ++i) {
+			if (get_bit(bitmap, i)) {
+				struct servent *service =
+					getservbyport((int)htons(i),
+						      proto->p_name);
+				if (service) {
+					strcat(ret, service->s_name);
+					strcat(ret, " ");
+				} else {
+					char tmp[U32_MAX_STR_LEN];
+					snprintf(tmp, U32_MAX_STR_LEN,
+						 "%d ", i);
+					strcat(ret, tmp);
+				}
+			}
+		}
+	}
+
+	return ret;
+
+	/*
+	int result = 0;
+	uint8_t protocol_number = buffer_read_u8(&packet);
+	ssize_t bitmap_size = buffer_remaining(&packet);
+	uint8_t *bitmap = buffer_current(&packet);
+	struct protoent *proto = getprotobynumber(protocol_number);
+
+
+	if (proto) {
+		int i;
+
+		strcpy(ret, proto->p_name);
+
+		for (i = 0; i < bitmap_size * 8; ++i) {
+			if (get_bit(bitmap, i)) {
+				struct servent *service =
+					getservbyport((int)htons(i),
+						      proto->p_name);
+				if (service) {
+					buffer_printf(output, " %s",
+						      service->s_name);
+				} else {
+					buffer_printf(output, " %d", i);
+				}
+			}
+		}
+		result = 1;
+	}
+	return ret;
+	*/
+}
+
+char *rdata_ipsecgateway_to_string(knot_rdata_item_t item,
+                                   const knot_rrset_t *rrset)
+{
+	const knot_rdata_item_t *gateway_type_item =
+		knot_rdata_item(knot_rrset_rdata(rrset), 1);
+	if (gateway_type_item == NULL) {
+		return NULL;
+	}
+	/* First two bytes store length. */
+	int gateway_type = ((uint8_t *)(gateway_type_item->raw_data))[2];
+	switch(gateway_type) {
+	case IPSECKEY_NOGATEWAY: {
+		char *ret = malloc(sizeof(char) * 4);
+		if (ret == NULL) {
+			ERR_ALLOC_FAILED;
+			return NULL;
+		}
+		memset(ret, 0, sizeof(char) * 4);
+		memcpy(ret, ".", 4);
+/*		ret[0] = '\"';
+		ret[1] = '.';
+		ret[2] = '\"';
+		ret[3] = '\0'; */
+		return ret;
+	}
+	case IPSECKEY_IP4:
+		return rdata_a_to_string(item);
+	case IPSECKEY_IP6:
+		return rdata_aaaa_to_string(item);
+	case IPSECKEY_DNAME:
+		return rdata_dname_to_string(item);
+	default:
+		return NULL;
+	}
+
+	/* Flow *should* not get here. */
+	return NULL;
+}
+
+char *rdata_nxt_to_string(knot_rdata_item_t item)
+{
+	size_t i;
+	uint8_t *bitmap = rdata_item_data(item);
+	size_t bitmap_size = rdata_item_size(item);
+
+	char *ret = malloc(sizeof(char) * MAX_NSEC_BIT_STR_LEN);
+
+	memset(ret, 0, MAX_NSEC_BIT_STR_LEN);
+
+	for (i = 0; i < bitmap_size * 8; ++i) {
+		if (get_bit(bitmap, i)) {
+			strcat(ret, knot_rrtype_to_string(i));
+				strcat(ret, " ");
+		}
+	}
+
+	return ret;
+}
+
+
+char *rdata_nsec_to_string(knot_rdata_item_t item)
+{
+	/* CLEANUP */
+//	int insert_space = 0;
+
+	char *ret = malloc(sizeof(char) * MAX_NSEC_BIT_STR_LEN);
+
+	memset(ret, 0, MAX_NSEC_BIT_STR_LEN);
+
+	uint8_t *data = rdata_item_data(item);
+
+	int increment = 0;
+
+	for (int i = 0; i < rdata_item_size(item); i += increment) {
+		increment = 0;
+		uint8_t window = data[i];
+		increment++;
+
+		uint8_t bitmap_size = data[i + increment];
+		increment++;
+
+		uint8_t *bitmap = malloc(sizeof(uint8_t) * bitmap_size);
+
+		memcpy(bitmap, data + i + increment,
+		       bitmap_size);
+
+		increment += bitmap_size;
+
+		for (int j = 0; j < bitmap_size * 8; j++) {
+			if (get_bit(bitmap, j)) {
+				strcat(ret,
+				       knot_rrtype_to_string(j +
+							       window * 256));
+				strcat(ret, " ");
+			}
+		}
+
+		free(bitmap);
+	}
+
+	return ret;
+
+	/* CLEANUP */
+/*	while (buffer_available(&packet, 2)) {
+		uint8_t window = buffer_read_u8(&packet);
+		uint8_t bitmap_size = buffer_read_u8(&packet);
+		uint8_t *bitmap = buffer_current(&packet);
+		int i;
+
+		if (!buffer_available(&packet, bitmap_size)) {
+			buffer_set_position(output, saved_position);
+			return 0;
+		}
+
+		for (i = 0; i < bitmap_size * 8; ++i) {
+			if (get_bit(bitmap, i)) {
+				buffer_printf(output,
+					      "%s%s",
+					      insert_space ? " " : "",
+					      rrtype_to_string(
+						      window * 256 + i));
+				insert_space = 1;
+			}
+		}
+		buffer_skip(&packet, bitmap_size);
+	}
+
+	return 1; */
+}
+
+char *rdata_unknown_to_string(knot_rdata_item_t item)
+{
+ 	uint16_t size = rdata_item_size(item);
+	char *ret =
+		malloc(sizeof(char) * (rdata_item_size(item) +
+				       strlen("\\# ") + U16_MAX_STR_LEN));
+	snprintf(ret, strlen("\\# ") + U16_MAX_STR_LEN, "%lu",
+		 (unsigned long) size);
+	char *converted = hex_to_string(rdata_item_data(item), size);
+	strcat(ret, converted);
+	free(converted);
+	return ret;
+}
+
+char *rdata_loc_to_string(knot_rdata_item_t item)
+{
+	return rdata_unknown_to_string(item);
+}
+
+typedef char * (*item_to_string_t)(knot_rdata_item_t);
+
+static item_to_string_t item_to_string_table[KNOT_RDATA_ZF_UNKNOWN + 1] = {
+	rdata_dname_to_string,
+	rdata_dns_name_to_string,
+	rdata_text_to_string,
+	rdata_byte_to_string,
+	rdata_short_to_string,
+	rdata_long_to_string,
+	rdata_a_to_string,
+	rdata_aaaa_to_string,
+	rdata_rrtype_to_string,
+	rdata_algorithm_to_string,
+	rdata_certificate_type_to_string,
+	rdata_period_to_string,
+	rdata_time_to_string,
+	rdata_base64_to_string,
+	rdata_base32_to_string,
+	rdata_hex_to_string,
+	rdata_hexlen_to_string,
+	rdata_nsap_to_string,
+	rdata_apl_to_string,
+	NULL, //rdata_ipsecgateway_to_string,
+	rdata_services_to_string,
+	rdata_nxt_to_string,
+	rdata_nsec_to_string,
+	rdata_loc_to_string,
+	rdata_unknown_to_string
+};
+
+char *rdata_item_to_string(knot_rdata_zoneformat_t type,
+                           knot_rdata_item_t item)
+{
+	return item_to_string_table[type](item);
+}
+
+/* CLEANUP */
+/*void knot_zone_tree_apply_inorder(knot_zone_t *zone,
+                              void (*function)(knot_node_t *node, void *data),
+                              void *data); */
+
+void rdata_dump_text(const knot_rdata_t *rdata, uint16_t type, FILE *f,
+                     const knot_rrset_t *rrset)
+{
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	char *item_str = NULL;
+	for (int i = 0; i < rdata->count; i++) {
+		/* Workaround for IPSec gateway. */
+		if (desc->zoneformat[i] == KNOT_RDATA_ZF_IPSECGATEWAY) {
+			item_str = rdata_ipsecgateway_to_string(rdata->items[i],
+			                                        rrset);
+		} else {
+			item_str = rdata_item_to_string(desc->zoneformat[i],
+						rdata->items[i]);
+		}
+		if (item_str == NULL) {
+			item_str =
+				rdata_item_to_string(KNOT_RDATA_ZF_UNKNOWN,
+						     rdata->items[i]);
+		}
+		if (i != rdata->count - 1) {
+			fprintf(f, "%s ", item_str);
+		} else {
+			fprintf(f, "%s", item_str);
+		}
+		free(item_str);
+	}
+	fprintf(f, "\n");
+}
+
+void dump_rrset_header(const knot_rrset_t *rrset, FILE *f)
+{
+	char *name = knot_dname_to_str(rrset->owner);
+	fprintf(f, "%-20s ",  name);
+	free(name);
+	fprintf(f, "%-5u ", rrset->ttl);
+	fprintf(f, "%-2s ", knot_rrclass_to_string(rrset->rclass));
+	fprintf(f, "%-5s ",  knot_rrtype_to_string(rrset->type));
+}
+
+void rrsig_set_dump_text(knot_rrset_t *rrsig, FILE *f)
+{
+	dump_rrset_header(rrsig, f);
+	knot_rdata_t *tmp = rrsig->rdata;
+
+	while (tmp->next != rrsig->rdata) {
+		rdata_dump_text(tmp, KNOT_RRTYPE_RRSIG, f, rrsig);
+		dump_rrset_header(rrsig, f);
+		tmp = tmp->next;
+	}
+
+	rdata_dump_text(tmp, KNOT_RRTYPE_RRSIG, f, rrsig);
+}
+
+
+void rrset_dump_text(const knot_rrset_t *rrset, FILE *f)
+{
+	dump_rrset_header(rrset, f);
+	knot_rdata_t *tmp = rrset->rdata;
+
+	while (tmp->next != rrset->rdata) {
+		rdata_dump_text(tmp, rrset->type, f, rrset);
+		dump_rrset_header(rrset, f);
+		tmp = tmp->next;
+	}
+
+	rdata_dump_text(tmp, rrset->type, f, rrset);
+	knot_rrset_t *rrsig_set = rrset->rrsigs;
+	if (rrsig_set != NULL) {
+		rrsig_set_dump_text(rrsig_set, f);
+	}
+}
+
+struct dump_param {
+	FILE *f;
+	const knot_dname_t *origin;
+};
+
+void apex_node_dump_text(knot_node_t *node, FILE *f)
+{
+	knot_rrset_t dummy_rrset;
+	dummy_rrset.type = KNOT_RRTYPE_SOA;
+	knot_rrset_t *tmp_rrset =
+		(knot_rrset_t *)gen_tree_find(node->rrset_tree,
+		                                &dummy_rrset);
+	assert(tmp_rrset);
+	rrset_dump_text(tmp_rrset, f);
+
+	const knot_rrset_t **rrsets =
+		knot_node_rrsets(node);
+
+	for (int i = 0; i < node->rrset_count; i++) {
+		if (rrsets[i]->type != KNOT_RRTYPE_SOA) {
+			rrset_dump_text(rrsets[i], f);
+		}
+	}
+
+	free(rrsets);
+}
+
+void node_dump_text(knot_node_t *node, void *data)
+{
+	struct dump_param *param;
+	param = (struct dump_param *)data;
+	FILE *f = param->f;
+	const knot_dname_t *origin = param->origin;
+
+	/* pointers should do in this case */
+	if (node->owner == origin) {
+		apex_node_dump_text(node, f);
+		return;
+	}
+
+	const knot_rrset_t **rrsets =
+		knot_node_rrsets(node);
+
+	for (int i = 0; i < node->rrset_count; i++) {
+			rrset_dump_text(rrsets[i], f);
+	}
+
+	free(rrsets);
+}
+
+int zone_dump_text(knot_zone_contents_t *zone, const char *filename)
+{
+	FILE *f = fopen(filename, "w");
+	if (f == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	fprintf(f, ";Dumped using %s v. %s\n", PACKAGE_NAME, PACKAGE_VERSION);
+
+	struct dump_param param;
+	param.f = f;
+	assert(zone->apex != NULL && zone->apex->owner != NULL);
+	param.origin = knot_node_owner(knot_zone_contents_apex(zone));
+	knot_zone_contents_tree_apply_inorder(zone, node_dump_text, &param);
+	knot_zone_contents_nsec3_apply_inorder(zone, node_dump_text, &param);
+	fclose(f);
+
+	return KNOT_EOK;
+}
diff --git a/src/knot/zone/zone-dump-text.h b/src/knot/zone/zone-dump-text.h
new file mode 100644
index 0000000..70dcff4
--- /dev/null
+++ b/src/knot/zone/zone-dump-text.h
@@ -0,0 +1,46 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file zone-dump-text.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Functions for dumping zone to text file.
+ *
+ * \addtogroup dnslib
+ * @{
+ */
+
+#ifndef _KNOT_ZONE_DUMP_TEXT_H_
+#define _KNOT_ZONE_DUMP_TEXT_H_
+
+#include "libknot/util/descriptor.h"
+#include "libknot/zone/zone.h"
+
+/*!
+ * \brief Dumps given zone to text (BIND-like) file.
+ *
+ * \param zone Zone to be saved.
+ * \param filename Name of file to be created.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EBADARG if the specified file is not valid for writing.
+ */
+int zone_dump_text(knot_zone_contents_t *zone, const char *filename);
+
+#endif // _KNOT_ZONE_DUMP_TEXT_H_
+
+/*! @} */
diff --git a/src/knot/zone/zone-dump.c b/src/knot/zone/zone-dump.c
new file mode 100644
index 0000000..afc577d
--- /dev/null
+++ b/src/knot/zone/zone-dump.c
@@ -0,0 +1,2301 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <assert.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include "libknot/common.h"
+#include "knot/zone/zone-dump.h"
+#include "libknot/libknot.h"
+#include "knot/other/debug.h"
+#include "common/skip-list.h"
+#include "common/base32hex.h"
+#include "common/crc.h"
+#include "libknot/util/error.h"
+
+#define ZONECHECKS_VERBOSE
+
+/*! \note Contents of a dump file:
+ * MAGIC(knotxx) db_filename dname_table
+ * NUMBER_OF_NORMAL_NODES NUMBER_OF_NSEC3_NODES
+ * [normal_nodes] [nsec3_nodes]
+ * --------------------------------------------
+ * dname_table is dumped as follows:
+ * NUMBER_OF_DNAMES [dname_wire_length dname_wire label_count dname_labels ID]
+ * node has following format:
+ * owner_id
+ * node_flags node_rrset_count [node_rrsets]
+ * rrset has following format:
+ * rrset_type rrset_class rrset_ttl rrset_rdata_count rrset_rrsig_count
+ * [rrset_rdata] [rrset_rrsigs]
+ * rdata can contain either dname ID,
+ * or raw data stored like this: data_len [data]
+ */
+
+static const uint MAX_CNAME_CYCLE_DEPTH = 15;
+
+/*!
+ *\brief Internal error constants. General errors are added for convenience,
+ *       so that code does not have to change if new errors are added.
+ */
+enum zonechecks_errors {
+	ZC_ERR_ALLOC = -40,
+	ZC_ERR_UNKNOWN,
+
+	ZC_ERR_MISSING_SOA,
+
+	ZC_ERR_GENERIC_GENERAL_ERROR, /* isn't there a better name? */
+
+	ZC_ERR_RRSIG_RDATA_TYPE_COVERED,
+	ZC_ERR_RRSIG_RDATA_TTL,
+	ZC_ERR_RRSIG_RDATA_LABELS,
+	ZC_ERR_RRSIG_RDATA_DNSKEY_OWNER,
+	ZC_ERR_RRSIG_RDATA_SIGNED_WRONG,
+	ZC_ERR_RRSIG_NO_RRSIG,
+	ZC_ERR_RRSIG_SIGNED,
+	ZC_ERR_RRSIG_OWNER,
+	ZC_ERR_RRSIG_CLASS,
+	ZC_ERR_RRSIG_TTL,
+	ZC_ERR_RRSIG_NOT_ALL,
+
+	ZC_ERR_RRSIG_GENERAL_ERROR,
+
+	ZC_ERR_NO_NSEC,
+	ZC_ERR_NSEC_RDATA_BITMAP,
+	ZC_ERR_NSEC_RDATA_MULTIPLE,
+	ZC_ERR_NSEC_RDATA_CHAIN,
+	ZC_ERR_NSEC_RDATA_CHAIN_NOT_CYCLIC,
+
+	ZC_ERR_NSEC_GENERAL_ERROR,
+
+	ZC_ERR_NSEC3_UNSECURED_DELEGATION,
+	ZC_ERR_NSEC3_NOT_FOUND,
+	ZC_ERR_NSEC3_UNSECURED_DELEGATION_OPT,
+	ZC_ERR_NSEC3_RDATA_TTL,
+	ZC_ERR_NSEC3_RDATA_CHAIN,
+	ZC_ERR_NSEC3_RDATA_BITMAP,
+
+	ZC_ERR_NSEC3_GENERAL_ERROR,
+
+	ZC_ERR_CNAME_CYCLE,
+	ZC_ERR_DNAME_CYCLE,
+	ZC_ERR_CNAME_EXTRA_RECORDS,
+	ZC_ERR_DNAME_EXTRA_RECORDS,
+	ZC_ERR_CNAME_EXTRA_RECORDS_DNSSEC,
+	ZC_ERR_CNAME_MULTIPLE,
+	ZC_ERR_DNAME_MULTIPLE,
+
+	ZC_ERR_CNAME_GENERAL_ERROR,
+
+	ZC_ERR_GLUE_NODE,
+	ZC_ERR_GLUE_RECORD,
+
+	ZC_ERR_GLUE_GENERAL_ERROR,
+};
+
+static char *error_messages[(-ZC_ERR_ALLOC) + 1] = {
+	[-ZC_ERR_ALLOC] = "Memory allocation error!\n",
+
+	[-ZC_ERR_MISSING_SOA] = "SOA record missing in zone!\n",
+
+	[-ZC_ERR_RRSIG_RDATA_TYPE_COVERED] =
+	"RRSIG: Type covered rdata field is wrong!\n",
+	[-ZC_ERR_RRSIG_RDATA_TTL] =
+	"RRSIG: TTL rdata field is wrong!\n",
+	[-ZC_ERR_RRSIG_RDATA_LABELS] =
+	"RRSIG: Labels rdata field is wrong!\n",
+	[-ZC_ERR_RRSIG_RDATA_DNSKEY_OWNER] =
+	"RRSIG: Signer name is different than in DNSKEY!\n",
+	[-ZC_ERR_RRSIG_RDATA_SIGNED_WRONG] =
+	"RRSIG: Key error!\n",
+	[-ZC_ERR_RRSIG_NO_RRSIG] =
+	"RRSIG: No RRSIG!\n",
+	[-ZC_ERR_RRSIG_SIGNED] =
+	"RRSIG: Signed RRSIG!\n",
+	[-ZC_ERR_RRSIG_OWNER] =
+	"RRSIG: Owner name rdata field is wrong!\n",
+	[-ZC_ERR_RRSIG_CLASS] =
+	"RRSIG: Class is wrong!\n",
+	[-ZC_ERR_RRSIG_TTL] =
+	"RRSIG: TTL is wrong!\n",
+	[-ZC_ERR_RRSIG_NOT_ALL] =
+	"RRSIG: Not all RRs are signed!\n",
+
+	[-ZC_ERR_NO_NSEC] =
+	"NSEC: Missing NSEC record\n",
+	[-ZC_ERR_NSEC_RDATA_BITMAP] =
+	"NSEC: Wrong NSEC bitmap!\n",
+	[-ZC_ERR_NSEC_RDATA_MULTIPLE] =
+	"NSEC: Multiple NSEC records!\n",
+	[-ZC_ERR_NSEC_RDATA_CHAIN] =
+	"NSEC: NSEC chain is not coherent!\n",
+	[-ZC_ERR_NSEC_RDATA_CHAIN_NOT_CYCLIC] =
+	"NSEC: NSEC chain is not cyclic!\n",
+
+	[-ZC_ERR_NSEC3_UNSECURED_DELEGATION] =
+	"NSEC3: Zone contains unsecured delegation!\n",
+	[-ZC_ERR_NSEC3_NOT_FOUND] =
+	"NSEC3: Could not find previous NSEC3 record in the zone!\n",
+	[-ZC_ERR_NSEC3_UNSECURED_DELEGATION_OPT] =
+	"NSEC3: Unsecured delegation is not part "
+	"of the Opt-Out span!\n",
+	[-ZC_ERR_NSEC3_RDATA_TTL] =
+	"NSEC3: Original TTL rdata field is wrong!\n",
+	[-ZC_ERR_NSEC3_RDATA_CHAIN] =
+	"NSEC3: NSEC3 chain is not coherent!\n",
+	[-ZC_ERR_NSEC3_RDATA_BITMAP] =
+	"NSEC3: NSEC3 bitmap error!\n",
+
+	[-ZC_ERR_CNAME_CYCLE] =
+	"CNAME: CNAME cycle!\n",
+	[-ZC_ERR_DNAME_CYCLE] =
+	"CNAME: DNAME cycle!\n",
+	[-ZC_ERR_CNAME_EXTRA_RECORDS] =
+	"CNAME: Node with CNAME record has other records!\n",
+	[-ZC_ERR_DNAME_EXTRA_RECORDS] =
+	"DNAME: Node with DNAME record has other records!\n",
+	[-ZC_ERR_CNAME_EXTRA_RECORDS_DNSSEC] =
+	"CNAME: Node with CNAME record has other "
+	"records than RRSIG and NSEC/NSEC3!\n",
+	[-ZC_ERR_CNAME_MULTIPLE] = "CNAME: Multiple CNAME records!\n",
+	[-ZC_ERR_DNAME_MULTIPLE] = "DNAME: Multiple DNAME records!\n",
+
+	/* ^
+	   | Important errors (to be logged on first occurence and counted) */
+
+
+	/* Below are errors of lesser importance, to be counted unless
+	   specified otherwise */
+
+	[-ZC_ERR_GLUE_NODE] =
+	"GLUE: Node with Glue record missing!\n",
+	[-ZC_ERR_GLUE_RECORD] =
+	"GLUE: Record with Glue address missing\n",
+};
+
+/*!
+ * \brief Structure representing handle options.
+ */
+struct handler_options {
+	char log_cname; /*!< Log all CNAME related semantic errors. */
+	char log_glue; /*!< Log all glue related semantic errors. */
+	char log_rrsigs; /*!< Log all RRSIG related semantic errors. */
+	char log_nsec; /*!< Log all NSEC related semantic errors. */
+	char log_nsec3; /*!< Log all NSEC3 related semantic errors. */
+};
+
+/*!
+ * \brief Structure for handling semantic errors.
+ */
+struct err_handler {
+	/* Consider moving error messages here */
+	struct handler_options options; /*!< Handler options. */
+	uint errors[(-ZC_ERR_ALLOC) + 1]; /*!< Array with error messages */
+};
+
+typedef struct err_handler err_handler_t;
+
+/*!
+ * \brief Creates new semantic error handler.
+ *
+ * \param log_cname If true, log all CNAME related events.
+ * \param log_glue If true, log all Glue related events.
+ * \param log_rrsigs If true, log all RRSIGs related events.
+ * \param log_nsec If true, log all NSEC related events.
+ * \param log_nsec3 If true, log all NSEC3 related events.
+ *
+ * \return err_handler_t * Created error handler.
+ */
+static err_handler_t *handler_new(char log_cname, char log_glue,
+				  char log_rrsigs, char log_nsec,
+				  char log_nsec3)
+{
+	err_handler_t *handler = malloc(sizeof(err_handler_t));
+	CHECK_ALLOC_LOG(handler, NULL);
+
+	/* It should be initialized, but to be safe */
+	memset(handler->errors, 0, sizeof(uint) * (-ZC_ERR_ALLOC + 1));
+
+	handler->options.log_cname = log_cname;
+	handler->options.log_glue = log_glue;
+	handler->options.log_rrsigs = log_rrsigs;
+	handler->options.log_nsec = log_nsec;
+	handler->options.log_nsec3 = log_nsec3;
+
+	return handler;
+}
+
+/*!
+ * \brief Prints error message with node information.
+ *
+ * \note If \a node is NULL, only total number of errors is printed.
+ *
+ * \param handler Error handler.
+ * \param node Node with semantic error in it.
+ * \param error Type of error.
+ */
+static void log_error_from_node(err_handler_t *handler,
+				const knot_node_t *node,
+				uint error)
+{
+	if (node != NULL) {
+		char *name =
+			knot_dname_to_str(knot_node_owner(node));
+		fprintf(stderr, "Semantic warning in node: %s: ", name);
+		fprintf(stderr, "%s", error_messages[-error]);
+		free(name);
+	} else {
+		fprintf(stderr, "Total number of warnings is: %d for error: %s",
+			handler->errors[-error],
+			error_messages[-error]);
+	}
+}
+
+/*!
+ * \brief Called when error has been encountered in node. Will either log error
+ *        or print it, depending on handler's options.
+ *
+ * \param handler Error handler.
+ * \param node Node with semantic error in it.
+ * \param error Type of error.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval ZC_ERR_UNKNOWN if unknown error.
+ * \retval ZC_ERR_ALLOC if memory error.
+ */
+static int err_handler_handle_error(err_handler_t *handler,
+				    const knot_node_t *node,
+				    uint error)
+{
+	assert(handler && node);
+	if ((error != 0) &&
+	    (error > ZC_ERR_GLUE_GENERAL_ERROR)) {
+		return ZC_ERR_UNKNOWN;
+	}
+
+	if (error == ZC_ERR_ALLOC) {
+		ERR_ALLOC_FAILED;
+		return ZC_ERR_ALLOC;
+	}
+
+	/* missing SOA can only occur once, so there
+	 * needn't to be an option for it */
+
+	if ((error != 0) &&
+	    (error < ZC_ERR_GENERIC_GENERAL_ERROR)) {
+		/* The two errors before SOA were handled */
+		log_error_from_node(handler, node, error);
+
+	} else if ((error < ZC_ERR_RRSIG_GENERAL_ERROR) &&
+		   ((handler->errors[-error] == 0) ||
+		   (handler->options.log_rrsigs))) {
+
+		log_error_from_node(handler, node, error);
+
+	} else if ((error > ZC_ERR_RRSIG_GENERAL_ERROR) &&
+		   (error < ZC_ERR_NSEC_GENERAL_ERROR) &&
+		   ((handler->errors[-error] == 0) ||
+		    (handler->options.log_nsec))) {
+
+		log_error_from_node(handler, node, error);
+
+	} else if ((error > ZC_ERR_NSEC_GENERAL_ERROR) &&
+		   (error < ZC_ERR_NSEC3_GENERAL_ERROR) &&
+		   ((handler->errors[-error] == 0) ||
+		    (handler->options.log_nsec3))) {
+
+		log_error_from_node(handler, node, error);
+
+	} else if ((error > ZC_ERR_NSEC3_GENERAL_ERROR) &&
+		   (error < ZC_ERR_CNAME_GENERAL_ERROR) &&
+		   ((handler->errors[-error] == 0) ||
+		    (handler->options.log_cname))) {
+
+		log_error_from_node(handler, node, error);
+
+	} else if ((error > ZC_ERR_CNAME_GENERAL_ERROR) &&
+		   (error < ZC_ERR_GLUE_GENERAL_ERROR) &&
+		    handler->options.log_glue) {
+
+		log_error_from_node(handler, node, error);
+
+	}
+
+	handler->errors[-error]++;
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief This function prints all errors that occured in zone.
+ *
+ * \param handler Error handler containing found errors.
+ */
+static void err_handler_log_all(err_handler_t *handler)
+{
+	if (handler == NULL) {
+		return;
+	}
+
+	for (int i = ZC_ERR_ALLOC; i < ZC_ERR_GLUE_GENERAL_ERROR; i++) {
+		if (handler->errors[-i] > 0) {
+			log_error_from_node(handler, NULL, i);
+		}
+	}
+}
+
+/*!
+ * \brief Arguments to be used with tree traversal functions. Uses void pointers
+ *        to be more versatile.
+ *
+ */
+struct arg {
+	void *arg1; /* FILE *f / zone */
+	void *arg2; /* skip_list_t */
+	void *arg3; /* zone */
+	void *arg4; /* first node */
+	void *arg5; /* last node */
+	void *arg6; /* error handler */
+	void *arg7; /* CRC */
+};
+
+typedef struct arg arg_t;
+
+/*!
+ * \brief Semantic check - CNAME cycles. Uses constant value with maximum
+ *        allowed CNAME chain depth.
+ *
+ * \param zone Zone containing the RRSet.
+ * \param rrset RRSet to be tested.
+ *
+ * \retval KNOT_EOK when there is no cycle.
+ * \retval ZC_ERR_CNAME_CYCLE when cycle is present.
+ */
+static int check_cname_cycles_in_zone(knot_zone_contents_t *zone,
+				      const knot_rrset_t *rrset)
+{
+	const knot_rrset_t *next_rrset = rrset;
+	assert(rrset);
+	const knot_rdata_t *tmp_rdata = knot_rrset_rdata(next_rrset);
+	const knot_node_t *next_node = NULL;
+
+	uint i = 0;
+
+	assert(tmp_rdata);
+
+	const knot_dname_t *next_dname =
+		knot_rdata_cname_name(tmp_rdata);
+
+	assert(next_dname);
+
+	while (i < MAX_CNAME_CYCLE_DEPTH && next_dname != NULL) {
+		next_node = knot_zone_contents_get_node(zone, next_dname);
+		if (next_node == NULL) {
+			next_node =
+				knot_zone_contents_get_nsec3_node(zone, next_dname);
+		}
+
+		if (next_node != NULL) {
+			next_rrset = knot_node_rrset(next_node,
+						       KNOT_RRTYPE_CNAME);
+			if (next_rrset != NULL) {
+				next_dname =
+				knot_rdata_cname_name(next_rrset->rdata);
+			} else {
+				next_node = NULL;
+				next_dname = NULL;
+			}
+		} else {
+			next_dname = NULL;
+		}
+		i++;
+	}
+
+	/* even if the length is 0, i will be 1 */
+	if (i >= MAX_CNAME_CYCLE_DEPTH) {
+		return ZC_ERR_CNAME_CYCLE;
+	}
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Return raw data from rdata item structure (without length).
+ *
+ * \param item Item to get rdata from.
+ * \return uint16_t * raw data without length.
+ */
+static inline uint16_t *rdata_item_data(const knot_rdata_item_t *item)
+{
+	return (uint16_t *)(item->raw_data + 1);
+}
+
+/*!
+ * \brief Returns type covered field from RRSIG RRSet's rdata.
+ *
+ * \param rdata RRSIG rdata.
+ * \return uint16_t Type covered.
+ */
+uint16_t type_covered_from_rdata(const knot_rdata_t *rdata)
+{
+	return ntohs(*(uint16_t *) rdata_item_data(&(rdata->items[0])));
+}
+
+/*!
+ * \brief Check whether DNSKEY rdata are valid.
+ *
+ * \param rdata DNSKEY rdata to be checked.
+ *
+ * \retval KNOT_EOK when rdata are OK.
+ * \retval ZC_ERR_RRSIG_RDATA_DNSKEY_OWNER when rdata are not OK.
+ */
+static int check_dnskey_rdata(const knot_rdata_t *rdata)
+{
+	/* check that Zone key bit it set - position 7 in net order */
+	/*! \todo FIXME: endian? I swear I've fixed this already, it was 7 i guesss*/
+	uint16_t mask = 1 << 8; //0b0000000100000000;
+
+	uint16_t flags =
+		knot_wire_read_u16((uint8_t *)rdata_item_data
+				     (knot_rdata_item(rdata, 0)));
+
+	if (flags & mask) {
+		return KNOT_EOK;
+	} else {
+		/* This error does not exactly fit, but it's better
+		 * than a new one */
+		return ZC_ERR_RRSIG_RDATA_DNSKEY_OWNER;
+	}
+}
+
+/*!
+ * \brief Calculates keytag for RSA/SHA algorithm.
+ *
+ * \param key Key wireformat.
+ * \param keysize Wireformat size.
+ *
+ * \return uint16_t Calculated keytag.
+ */
+static uint16_t keytag_1(uint8_t *key, uint16_t keysize)
+{
+	uint16_t ac = 0;
+	if (keysize > 4) {
+		memmove(&ac, key + keysize - 3, 2);
+	}
+
+	ac = ntohs(ac);
+	return ac;
+}
+
+/*!
+ * \brief Calculates keytag from key wire.
+ *
+ * \param key Key wireformat.
+ * \param keysize Wireformat size.
+ *
+ * \return uint16_t Calculated keytag.
+ */
+static uint16_t keytag(uint8_t *key, uint16_t keysize )
+{
+	uint32_t ac = 0; /* assumed to be 32 bits or larger */
+
+	/* algorithm RSA/SHA */
+	if (key[3] == 1) {
+		return keytag_1(key, keysize);
+	} else {
+		for(int i = 0; i < keysize; i++) {
+			ac += (i & 1) ? key[i] : key[i] << 8;
+		}
+
+		ac += (ac >> 16) & 0xFFFF;
+		return (uint16_t)ac & 0xFFFF;
+	}
+}
+
+/*!
+ * \brief Returns size of raw data item.
+ *
+ * \param item Raw data item.
+ *
+ * \return uint16_t Size of raw data item.
+ */
+static inline uint16_t rdata_item_size(const knot_rdata_item_t *item)
+{
+	return item->raw_data[0];
+}
+
+/*!
+ * \brief Converts DNSKEY rdata to wireformat.
+ *
+ * \param rdata DNSKEY rdata to be converted.
+ * \param wire Created wire.
+ * \param size Size of created wire.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_ENOMEM on memory error.
+ */
+static int dnskey_to_wire(const knot_rdata_t *rdata, uint8_t **wire,
+			  uint *size)
+{
+	assert(*wire == NULL);
+	/* flags + algorithm + protocol + keysize */
+	*size = 2 + 1 + 1 + knot_rdata_item(rdata, 3)->raw_data[0];
+	*wire = malloc(sizeof(uint8_t) * *size);
+	CHECK_ALLOC_LOG(*wire, KNOT_ENOMEM);
+
+	/* copy the wire octet by octet */
+
+	/* TODO check if we really have that many items */
+	if (rdata->count < 4) {
+		return KNOT_ERROR;
+	}
+
+	(*wire)[0] = ((uint8_t *)(knot_rdata_item(rdata, 0)->raw_data))[2];
+	(*wire)[1] = ((uint8_t *)(knot_rdata_item(rdata, 0)->raw_data))[3];
+
+	(*wire)[2] = ((uint8_t *)(knot_rdata_item(rdata, 1)->raw_data))[2];
+	(*wire)[3] = ((uint8_t *)(knot_rdata_item(rdata, 2)->raw_data))[2];
+
+	memcpy(*wire + 4, knot_rdata_item(rdata, 3)->raw_data + 1,
+	       knot_rdata_item(rdata, 3)->raw_data[0]);
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Semantic check - RRSIG rdata.
+ *
+ * \param rdata_rrsig RRSIG rdata to be checked.
+ * \param rrset RRSet containing the rdata.
+ * \param dnskey_rrset RRSet containing zone's DNSKEY
+ *
+ * \retval KNOT_EOK if rdata are OK.
+ *
+ * \return Appropriate error code if error was found.
+ */
+static int check_rrsig_rdata(const knot_rdata_t *rdata_rrsig,
+			     const knot_rrset_t *rrset,
+			     const knot_rrset_t *dnskey_rrset)
+{
+	if (rdata_rrsig == NULL) {
+		return ZC_ERR_RRSIG_NO_RRSIG;
+	}
+
+	if (type_covered_from_rdata(rdata_rrsig) !=
+	    knot_rrset_type(rrset)) {
+		/* zoneparser would not let this happen
+		 * but to be on the safe side
+		 */
+		return ZC_ERR_RRSIG_RDATA_TYPE_COVERED;
+	}
+
+	/* label number at the 2nd index should be same as owner's */
+	uint16_t *raw_data =
+		rdata_item_data(knot_rdata_item(rdata_rrsig, 2));
+
+	uint8_t labels_rdata = ((uint8_t *)raw_data)[0];
+
+	int tmp = knot_dname_label_count(knot_rrset_owner(rrset)) -
+		  labels_rdata;
+
+	if (tmp != 0) {
+		/* if name has wildcard, label must not be included */
+		if (!knot_dname_is_wildcard(knot_rrset_owner(rrset))) {
+			return ZC_ERR_RRSIG_RDATA_LABELS;
+		} else {
+			if (abs(tmp) != 1) {
+				return ZC_ERR_RRSIG_RDATA_LABELS;
+			}
+		}
+	}
+
+	/* check original TTL */
+	uint32_t original_ttl =
+		knot_wire_read_u32((uint8_t *)rdata_item_data(
+				     knot_rdata_item(rdata_rrsig, 3)));
+
+	if (original_ttl != knot_rrset_ttl(rrset)) {
+		return ZC_ERR_RRSIG_RDATA_TTL;
+	}
+
+	/* signer's name is same as in the zone apex */
+	knot_dname_t *signer_name =
+		knot_rdata_item(rdata_rrsig, 7)->dname;
+
+	/* dnskey is in the apex node */
+	if (knot_dname_compare(signer_name,
+				 knot_rrset_owner(dnskey_rrset)) != 0) {
+		return ZC_ERR_RRSIG_RDATA_DNSKEY_OWNER;
+	}
+
+	/* Compare algorithm, key tag and signer's name with DNSKEY rrset
+	 * one of the records has to match. Signer name has been checked
+	 * before */
+	char match = 0;
+	const knot_rdata_t *tmp_dnskey_rdata =
+		knot_rrset_rdata(dnskey_rrset);
+	do {
+		uint8_t alg =
+		((uint8_t *)(knot_rdata_item(rdata_rrsig, 1)->raw_data))[2];
+		uint8_t alg_dnskey =
+		((uint8_t *)(knot_rdata_item(tmp_dnskey_rdata,
+					       2)->raw_data))[2];
+
+		raw_data = rdata_item_data(knot_rdata_item(rdata_rrsig, 6));
+		uint16_t key_tag_rrsig =
+			knot_wire_read_u16((uint8_t *)raw_data);
+
+/*		raw_data =
+			rdata_item_data(knot_rdata_item(
+					tmp_dnskey_rdata, 3));
+
+		uint16_t raw_length = rdata_item_size(knot_rdata_item(
+						     tmp_dnskey_rdata, 3)); */
+
+		uint8_t *dnskey_wire = NULL;
+		uint dnskey_wire_size = 0;
+
+		int ret = 0;
+		if ((ret = dnskey_to_wire(tmp_dnskey_rdata, &dnskey_wire,
+				   &dnskey_wire_size)) != KNOT_EOK) {
+			return ret;
+		}
+
+		uint16_t key_tag_dnskey =
+			keytag(dnskey_wire, dnskey_wire_size);
+
+		free(dnskey_wire);
+
+		match = (alg == alg_dnskey) &&
+			(key_tag_rrsig == key_tag_dnskey) &&
+			!check_dnskey_rdata(tmp_dnskey_rdata);
+
+	} while (!match &&
+		 ((tmp_dnskey_rdata =
+			knot_rrset_rdata_next(dnskey_rrset,
+						tmp_dnskey_rdata))
+		!= NULL));
+
+	if (!match) {
+		return ZC_ERR_RRSIG_RDATA_SIGNED_WRONG;
+	}
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Semantic check - RRSet's RRSIG.
+ *
+ * \param rrset RRSet containing RRSIG.
+ * \param dnskey_rrset
+ * \param nsec3 NSEC3 active.
+ *
+ * \retval KNOT_EOK on success.
+ *
+ * \return Appropriate error code if error was found.
+ */
+static int check_rrsig_in_rrset(const knot_rrset_t *rrset,
+				const knot_rrset_t *dnskey_rrset,
+				char nsec3)
+{
+	assert(dnskey_rrset && rrset);
+
+	const knot_rrset_t *rrsigs = knot_rrset_rrsigs(rrset);
+
+	if (rrsigs == NULL) {
+		return ZC_ERR_RRSIG_NO_RRSIG;
+	}
+
+	/* signed rrsig - nonsense */
+	if (knot_rrset_rrsigs(rrsigs) != NULL) {
+		return ZC_ERR_RRSIG_SIGNED;
+	}
+
+	/* Different owner, class, ttl */
+
+	if (knot_dname_compare(knot_rrset_owner(rrset),
+				 knot_rrset_owner(rrsigs)) != 0) {
+		return ZC_ERR_RRSIG_OWNER;
+	}
+
+	if (knot_rrset_class(rrset) != knot_rrset_class(rrsigs)) {
+		return ZC_ERR_RRSIG_CLASS;
+	}
+
+	if (knot_rrset_ttl(rrset) != knot_rrset_ttl(rrset)) {
+		return ZC_ERR_RRSIG_TTL;
+	}
+
+	/* Check whether all rrsets have their rrsigs */
+	const knot_rdata_t *tmp_rdata = knot_rrset_rdata(rrset);
+	const knot_rdata_t *tmp_rrsig_rdata = knot_rrset_rdata(rrsigs);
+
+	assert(tmp_rdata);
+	assert(tmp_rrsig_rdata);
+	int ret = 0;
+	char all_signed = tmp_rdata && tmp_rrsig_rdata;
+	do {
+		if ((ret = check_rrsig_rdata(tmp_rrsig_rdata,
+					     rrset,
+					     dnskey_rrset)) != 0) {
+			return ret;
+		}
+
+		all_signed = tmp_rdata && tmp_rrsig_rdata;
+	} while (((tmp_rdata = knot_rrset_rdata_next(rrset, tmp_rdata))
+		!= NULL) &&
+		((tmp_rrsig_rdata =
+			knot_rrset_rdata_next(rrsigs, tmp_rrsig_rdata))
+		!= NULL));
+
+	if (!all_signed) {
+		return ZC_ERR_RRSIG_NOT_ALL;
+	}
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Returns bit on index from array in network order. Taken from NSD.
+ *
+ * \param bits Array in network order.
+ * \param index Index to return from array.
+ *
+ * \return int Bit on given index.
+ */
+static int get_bit(uint8_t *bits, size_t index)
+{
+	/*
+	 * The bits are counted from left to right, so bit #0 is the
+	 * leftmost bit.
+	 */
+	return bits[index / 8] & (1 << (7 - index % 8));
+}
+
+/*!
+ * \brief Converts NSEC bitmap to array of integers. (Inspired by NSD code)
+ *
+ * \param item Item containing the bitmap.
+ * \param array Array to be created.
+ * \param count Count of items in array.
+ *
+ * \retval KNOT_OK on success.
+ * \retval KNOT_NOMEM on memory error.
+ */
+static int rdata_nsec_to_type_array(const knot_rdata_item_t *item,
+			      uint16_t **array,
+			      uint *count)
+{
+	assert(*array == NULL);
+
+	uint8_t *data = (uint8_t *)rdata_item_data(item);
+
+	int increment = 0;
+	*count = 0;
+
+	for (int i = 0; i < rdata_item_size(item); i += increment) {
+		increment = 0;
+		uint8_t window = data[i];
+		increment++;
+
+		uint8_t bitmap_size = data[i + increment];
+		increment++;
+
+		uint8_t *bitmap =
+			malloc(sizeof(uint8_t) * (bitmap_size));
+		if (bitmap == NULL) {
+			ERR_ALLOC_FAILED;
+			free(*array);
+			return KNOT_ENOMEM;
+		}
+
+		memcpy(bitmap, data + i + increment,
+		       bitmap_size);
+
+		increment += bitmap_size;
+
+		for (int j = 0; j < bitmap_size * 8; j++) {
+			if (get_bit(bitmap, j)) {
+				(*count)++;
+				void *tmp = realloc(*array,
+						    sizeof(uint16_t) *
+						    *count);
+				if (tmp == NULL) {
+					ERR_ALLOC_FAILED;
+					free(bitmap);
+					free(*array);
+					return KNOT_ENOMEM;
+				}
+				*array = tmp;
+				(*array)[*count - 1] = j + window * 256;
+			}
+		}
+		free(bitmap);
+	}
+
+	return KNOT_EOK;
+}
+
+/* should write error, not return values !!! */
+
+/*!
+ * \brief Semantic check - check node's NSEC node.
+ *
+ * \param zone Current zone.
+ * \param node Node to be checked.
+ * \param handler Error handler
+ *
+ * \retval KNOT_EOK if no error was found.
+ *
+ * \return Appropriate error code if error was found.
+ */
+static int check_nsec3_node_in_zone(knot_zone_contents_t *zone, knot_node_t *node,
+                                    err_handler_t *handler)
+{
+	assert(handler);
+	const knot_node_t *nsec3_node = knot_node_nsec3_node(node, 0);
+
+	if (nsec3_node == NULL) {
+		/* I know it's probably not what RFCs say, but it will have to
+		 * do for now. */
+		if (knot_node_rrset(node, KNOT_RRTYPE_DS) != NULL) {
+			err_handler_handle_error(handler, node,
+					ZC_ERR_NSEC3_UNSECURED_DELEGATION);
+		} else {
+			/* Unsecured delegation, check whether it is part of
+			 * opt-out span */
+			const knot_node_t *nsec3_previous;
+			const knot_node_t *nsec3_node;
+
+			if (knot_zone_contents_find_nsec3_for_name(zone,
+						knot_node_owner(node),
+						&nsec3_node,
+						&nsec3_previous, 0) != 0) {
+				err_handler_handle_error(handler, node,
+						 ZC_ERR_NSEC3_NOT_FOUND);
+			}
+
+			if (nsec3_node == NULL) {
+				/* Probably should not ever happen */
+				return ZC_ERR_NSEC3_NOT_FOUND;
+			}
+
+			assert(nsec3_previous);
+
+			const knot_rrset_t *previous_rrset =
+				knot_node_rrset(nsec3_previous,
+						  KNOT_RRTYPE_NSEC3);
+
+			assert(previous_rrset);
+
+			/* check for Opt-Out flag */
+			uint8_t flags =
+		((uint8_t *)(previous_rrset->rdata->items[1].raw_data))[2];
+
+			uint8_t opt_out_mask = 1;
+
+			if (!(flags & opt_out_mask)) {
+				err_handler_handle_error(handler, node,
+					ZC_ERR_NSEC3_UNSECURED_DELEGATION_OPT);
+			}
+		}
+	}
+
+	const knot_rrset_t *nsec3_rrset =
+		knot_node_rrset(nsec3_node, KNOT_RRTYPE_NSEC3);
+
+	assert(nsec3_rrset);
+
+	const knot_rrset_t *soa_rrset =
+		knot_node_rrset(knot_zone_contents_apex(zone),
+	                        KNOT_RRTYPE_SOA);
+	assert(soa_rrset);
+
+	uint32_t minimum_ttl =
+		knot_wire_read_u32((uint8_t *)
+		rdata_item_data(
+		knot_rdata_item(
+		knot_rrset_rdata(
+		knot_node_rrset(
+		knot_zone_contents_apex(zone), KNOT_RRTYPE_SOA)), 6)));
+	/* Are those getters even worth this?
+	 * Now I have no idea what this code does. */
+
+	if (knot_rrset_ttl(nsec3_rrset) != minimum_ttl) {
+			err_handler_handle_error(handler, node,
+						 ZC_ERR_NSEC3_RDATA_TTL);
+	}
+
+	/* check that next dname is in the zone */
+	uint8_t *next_dname_decoded = NULL;
+	size_t real_size = 0;
+
+	if (((real_size = base32hex_encode_alloc(((char *)
+		rdata_item_data(&(nsec3_rrset->rdata->items[4]))) + 1,
+		rdata_item_size(&nsec3_rrset->rdata->items[4]) - 1,
+		(char **)&next_dname_decoded)) <= 0) ||
+		(next_dname_decoded == NULL)) {
+		fprintf(stderr, "Could not encode base32 string!\n");
+		return KNOT_ERROR;
+	}
+
+	/* This is why we allocate maximum length of decoded string + 1 */
+	memmove(next_dname_decoded + 1, next_dname_decoded, real_size);
+	next_dname_decoded[0] = real_size;
+
+	/* Local allocation, will be discarded. */
+	knot_dname_t *next_dname =
+		knot_dname_new_from_wire(next_dname_decoded,
+					   real_size + 1, NULL);
+	CHECK_ALLOC_LOG(next_dname, KNOT_ENOMEM);
+
+	free(next_dname_decoded);
+
+	if (knot_dname_cat(next_dname,
+		     knot_node_owner(knot_zone_contents_apex(zone))) == NULL) {
+		fprintf(stderr, "Could not concatenate dnames!\n");
+		return KNOT_ERROR;
+
+	}
+
+	if (knot_zone_contents_find_nsec3_node(zone, next_dname) == NULL) {
+		err_handler_handle_error(handler, node,
+					 ZC_ERR_NSEC3_RDATA_CHAIN);
+	}
+
+	/* Directly discard. */
+	knot_dname_free(&next_dname);
+
+	/* This is probably not sufficient, but again, it is covered in
+	 * zone load time */
+
+	uint count;
+	uint16_t *array = NULL;
+	if (rdata_nsec_to_type_array(
+	    knot_rdata_item(
+	    knot_rrset_rdata(nsec3_rrset), 5),
+	    &array, &count) != 0) {
+			err_handler_handle_error(handler, node,
+						 ZC_ERR_ALLOC);
+			return KNOT_ERROR;
+	}
+
+	uint16_t type = 0;
+	for (int j = 0; j < count; j++) {
+		/* test for each type's presence */
+		type = array[j];
+		if (type == KNOT_RRTYPE_RRSIG) {
+		       continue;
+		}
+		if (knot_node_rrset(node,
+				      type) == NULL) {
+			err_handler_handle_error(handler, node,
+						 ZC_ERR_NSEC3_RDATA_BITMAP);
+			break;
+/*			char *name =
+				knot_dname_to_str(
+			log_zone_error("Node %s does "
+					"not contain RRSet of type %s "
+					"but NSEC bitmap says "
+					"it does!\n", name,
+					knot_rrtype_to_string(type));
+			free(name); */
+		}
+	}
+
+	free(array);
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Run semantic checks for node without DNSSEC-related types.
+ *
+ * \param zone Current zone.
+ * \param node Node to be checked.
+ * \param do_checks Level of checks to be done.
+ * \param handler Error handler.
+ *
+ * \retval KNOT_EOK if no error was found.
+ *
+ * \return Appropriate error code if error was found.
+ */
+static int semantic_checks_plain(knot_zone_contents_t *zone,
+				 knot_node_t *node,
+				 char do_checks,
+				 err_handler_t *handler)
+{
+	assert(handler);
+	const knot_rrset_t *cname_rrset =
+			knot_node_rrset(node, KNOT_RRTYPE_CNAME);
+	if (cname_rrset != NULL) {
+		if (check_cname_cycles_in_zone(zone, cname_rrset) !=
+				KNOT_EOK) {
+			err_handler_handle_error(handler, node,
+						 ZC_ERR_CNAME_CYCLE);
+		}
+
+		/* No DNSSEC and yet there is more than one rrset in node */
+		if (do_checks == 1 &&
+		                knot_node_rrset_count(node) != 1) {
+			err_handler_handle_error(handler, node,
+			                         ZC_ERR_CNAME_EXTRA_RECORDS);
+		} else if (knot_node_rrset_count(node) != 1) {
+			/* With DNSSEC node can contain RRSIG or NSEC */
+			if (!(knot_node_rrset(node, KNOT_RRTYPE_RRSIG) ||
+			      knot_node_rrset(node, KNOT_RRTYPE_NSEC)) ||
+			    knot_node_rrset_count(node) > 3) {
+				err_handler_handle_error(handler, node,
+				ZC_ERR_CNAME_EXTRA_RECORDS_DNSSEC);
+			}
+		}
+
+		if (knot_rrset_rdata(cname_rrset)->next !=
+		                knot_rrset_rdata(cname_rrset)) {
+			err_handler_handle_error(handler, node,
+			                         ZC_ERR_CNAME_MULTIPLE);
+		}
+	}
+
+	const knot_rrset_t *dname_rrset =
+		knot_node_rrset(node, KNOT_RRTYPE_DNAME);
+	if (dname_rrset != NULL) {
+		if (check_cname_cycles_in_zone(zone, dname_rrset) !=
+				KNOT_EOK) {
+			err_handler_handle_error(handler, node,
+						 ZC_ERR_DNAME_CYCLE);
+		}
+
+		if (knot_node_rrset(node, KNOT_RRTYPE_CNAME)) {
+			err_handler_handle_error(handler, node,
+			                         ZC_ERR_DNAME_EXTRA_RECORDS);
+		}
+
+		if (knot_rrset_rdata(dname_rrset)->next !=
+		    knot_rrset_rdata(dname_rrset)) {
+			err_handler_handle_error(handler, node,
+			                         ZC_ERR_DNAME_MULTIPLE);
+		}
+	}
+
+	/* check for glue records at zone cuts */
+	if (knot_node_is_deleg_point(node)) {
+		const knot_rrset_t *ns_rrset =
+				knot_node_rrset(node, KNOT_RRTYPE_NS);
+		assert(ns_rrset);
+		//FIXME this should be an error as well ! (i guess)
+
+		const knot_dname_t *ns_dname =
+				knot_rdata_get_item(knot_rrset_rdata
+						      (ns_rrset), 0)->dname;
+
+		assert(ns_dname);
+
+		const knot_node_t *glue_node =
+				knot_zone_contents_find_node(zone, ns_dname);
+
+		if (knot_dname_is_subdomain(ns_dname,
+			      knot_node_owner(knot_zone_contents_apex(zone)))) {
+			if (glue_node == NULL) {
+				err_handler_handle_error(handler, node,
+							 ZC_ERR_GLUE_NODE);
+			} else {
+				if ((knot_node_rrset(glue_node,
+					       KNOT_RRTYPE_A) == NULL) &&
+				    (knot_node_rrset(glue_node,
+					       KNOT_RRTYPE_AAAA) == NULL)) {
+					err_handler_handle_error(handler, node,
+							 ZC_ERR_GLUE_RECORD);
+				}
+			}
+		}
+	}
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Run semantic checks for node without DNSSEC-related types.
+ *
+ * \param zone Current zone.
+ * \param node Node to be checked.
+ * \param first_node First node in canonical order.
+ * \param last_node Last node in canonical order.
+ * \param handler Error handler.
+ * \param nsec3 NSEC3 used.
+ *
+ * \retval KNOT_EOK if no error was found.
+ *
+ * \return Appropriate error code if error was found.
+ */
+static int semantic_checks_dnssec(knot_zone_contents_t *zone,
+				  knot_node_t *node,
+				  knot_node_t *first_node,
+				  knot_node_t **last_node,
+				  err_handler_t *handler,
+				  char nsec3)
+{
+	assert(handler);
+	assert(node);
+	char auth = !knot_node_is_non_auth(node);
+	char deleg = knot_node_is_deleg_point(node);
+	uint rrset_count = knot_node_rrset_count(node);
+	const knot_rrset_t **rrsets = knot_node_rrsets(node);
+	const knot_rrset_t *dnskey_rrset =
+		knot_node_rrset(knot_zone_contents_apex(zone),
+				  KNOT_RRTYPE_DNSKEY);
+
+	int ret = 0;
+
+	for (int i = 0; i < rrset_count; i++) {
+		const knot_rrset_t *rrset = rrsets[i];
+		if (auth && !deleg &&
+		    (ret = check_rrsig_in_rrset(rrset, dnskey_rrset,
+						nsec3)) != 0) {
+		  /* CLEANUP */
+/*			log_zone_error("RRSIG %d node %s\n", ret,
+				       knot_dname_to_str(node->owner));*/
+
+			err_handler_handle_error(handler, node, ret);
+		}
+
+		if (!nsec3 && auth) {
+			/* check for NSEC record */
+			const knot_rrset_t *nsec_rrset =
+					knot_node_rrset(node,
+							  KNOT_RRTYPE_NSEC);
+
+			if (nsec_rrset == NULL) {
+				err_handler_handle_error(handler, node,
+							 ZC_ERR_NO_NSEC);
+				/* CLEANUP */
+/*				char *name =
+					knot_dname_to_str(node->owner);
+				log_zone_error("Missing NSEC in node: "
+					       "%s\n", name);
+				free(name);
+				return; */
+			} else {
+
+				/* check NSEC/NSEC3 bitmap */
+
+				uint count;
+
+				uint16_t *array = NULL;
+
+				if (rdata_nsec_to_type_array(
+						knot_rdata_item(
+						knot_rrset_rdata(nsec_rrset),
+						1),
+						&array, &count) != 0) {
+					err_handler_handle_error(handler,
+								 NULL,
+								 ZC_ERR_ALLOC);
+					return ZC_ERR_ALLOC; /* ... */
+					/*return; */
+				}
+
+				uint16_t type = 0;
+				for (int j = 0; j < count; j++) {
+					/* test for each type's presence */
+					type = array[j];
+					if (type == KNOT_RRTYPE_RRSIG) {
+						continue;
+					}
+					if (knot_node_rrset(node,
+							      type) == NULL) {
+					err_handler_handle_error(
+						handler,
+						node,
+						ZC_ERR_NSEC_RDATA_BITMAP);
+					/* CLEANUP */
+	/*					char *name =
+						knot_dname_to_str(
+						knot_node_owner(node));
+
+						log_zone_error("Node %s does "
+						"not contain RRSet of type %s "
+						"but NSEC bitmap says "
+					       "it does!\n", name,
+					       knot_rrtype_to_string(type));
+
+					free(name); */
+					}
+				}
+				free(array);
+			}
+
+			/* Test that only one record is in the
+				 * NSEC RRSet */
+
+			if ((nsec_rrset != NULL) &&
+			    knot_rrset_rdata(nsec_rrset)->next !=
+			    knot_rrset_rdata(nsec_rrset)) {
+				err_handler_handle_error(handler,
+						 node,
+						 ZC_ERR_NSEC_RDATA_MULTIPLE);
+				/* CLEANUP */
+/*				char *name =
+					knot_dname_to_str(
+					knot_node_owner(node));
+				log_zone_error("Node %s contains more "
+					       "than one NSEC "
+					       "record!\n", name);
+				knot_rrset_dump(nsec_rrset, 0);
+				free(name); */
+			}
+
+			/*
+			 * Test that NSEC chain is coherent.
+			 * We have already checked that every
+			 * authoritative node contains NSEC record
+			 * so checking should only be matter of testing
+			 * the next link in each node.
+			 */
+
+			if (nsec_rrset != NULL) {
+				knot_dname_t *next_domain =
+					knot_rdata_item(
+					knot_rrset_rdata(nsec_rrset),
+					0)->dname;
+
+				assert(next_domain);
+
+				if (knot_zone_contents_find_node(zone, next_domain) ==
+				    NULL) {
+					err_handler_handle_error(handler,
+						node,
+						ZC_ERR_NSEC_RDATA_CHAIN);
+					/* CLEANUP */
+/*					log_zone_error("NSEC chain is not "
+						       "coherent!\n"); */
+				}
+
+				if (knot_dname_compare(next_domain,
+				    knot_node_owner(knot_zone_contents_apex(zone)))
+					== 0) {
+					/* saving the last node */
+					*last_node = node;
+				}
+
+			}
+		} else if (nsec3 && (auth || deleg)) { /* nsec3 */
+			int ret = check_nsec3_node_in_zone(zone, node,
+			                                   handler);
+			if (ret != KNOT_EOK) {
+				free(rrsets);
+				return ret;
+			}
+		}
+	}
+	free(rrsets);
+
+	return KNOT_EOK;
+}
+
+/*!
+ * \brief Function called by zone traversal function. Used to call
+ *        knot_zone_save_enclosers.
+ *
+ * \param node Node to be searched.
+ * \param data Arguments.
+ */
+static void do_checks_in_tree(knot_node_t *node, void *data)
+{
+	assert(data != NULL);
+	arg_t *args = (arg_t *)data;
+
+	knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+	short count = knot_node_rrset_count(node);
+
+	assert(count == 0 || rrsets != NULL);
+
+	knot_zone_contents_t *zone = (knot_zone_contents_t *)args->arg1;
+
+	assert(zone);
+
+
+/*	for (int i = 0; i < count; ++i) {
+		assert(rrsets[i] != NULL);
+		knot_zone_save_enclosers_rrset(rrsets[i],
+						 zone,
+						 (skip_list_t *)args->arg2);
+	} */
+
+	knot_node_t *first_node = (knot_node_t *)args->arg4;
+	knot_node_t **last_node = (knot_node_t **)args->arg5;
+
+	err_handler_t *handler = (err_handler_t *)args->arg6;
+
+	char do_checks = *((char *)(args->arg3));
+
+	if (do_checks) {
+		semantic_checks_plain(zone, node, do_checks, handler);
+	}
+
+	if (do_checks > 1) {
+		semantic_checks_dnssec(zone, node, first_node, last_node,
+				       handler, do_checks == 3);
+	}
+
+	free(rrsets);
+}
+
+/*!
+ * \brief Helper function - wraps its arguments into arg_t structure and
+ *        calls function that does the actual work.
+ *
+ * \param zone Zone to be searched / checked
+ * \param list Skip list of closests enclosers.
+ * \param do_checks Level of semantic checks.
+ * \param handler Semantic error handler.
+ * \param last_node Last checked node, which is part of NSEC(3) chain.
+ */
+void zone_do_sem_checks(knot_zone_contents_t *zone, char do_checks,
+                        err_handler_t *handler,
+                        knot_node_t **last_node)
+{
+	if (!do_checks) {
+		return;
+	}
+
+	arg_t arguments;
+	arguments.arg1 = zone;
+	arguments.arg3 = &do_checks;
+	arguments.arg4 = NULL;
+	arguments.arg5 = last_node;
+	arguments.arg6 = handler;
+
+	knot_zone_contents_tree_apply_inorder(zone,
+			   do_checks_in_tree,
+			   (void *)&arguments);
+}
+
+static inline int fwrite_to_file_crc(const void *src,
+                                     size_t size, size_t n, FILE *f,
+                                     crc_t *crc)
+{
+	size_t rc = fwrite(src, size, n, f);
+	if (rc != n) {
+		fprintf(stderr, "fwrite: invalid write %zu (expected %zu)\n", rc,
+			n);
+	}
+	/* \todo this seems to be wrong, if you fwrite less than n items, you probably should not continue */
+
+	if (size * n > 0) {
+		*crc =
+			crc_update(*crc, (unsigned char *)src,
+		                   size * n);
+	}
+
+	/* \todo the rc return is certainly wrong as it is used in the caller function */
+//	return rc == n;
+	return (int)rc;
+
+}
+
+static inline int fwrite_to_stream(const void *src,
+                                   size_t size, size_t n,
+                                   uint8_t **stream,
+                                   size_t *stream_size)
+{
+	/* Resize the stream */
+	void *tmp = realloc(*stream,
+			    (*stream_size + (size * n)) * sizeof(uint8_t));
+	if (tmp != NULL) {
+		*stream = tmp;
+		memcpy(*stream + *stream_size, src,
+		       size * n);
+		*stream_size += (size * n) * sizeof(uint8_t);
+		return KNOT_EOK;
+	} else {
+		free(*stream);
+		return KNOT_ENOMEM;
+	}
+
+	return KNOT_EOK;
+}
+
+static int fwrite_wrapper(const void *src,
+                          size_t size, size_t n, FILE *fp,
+                          uint8_t **stream, size_t *stream_size, crc_t *crc)
+{
+	if (fp == NULL) {
+		assert(stream && stream_size);
+		assert(crc == NULL);
+		return fwrite_to_stream(src, size, n, stream, stream_size);
+	} else {
+		assert(stream == NULL && stream_size == NULL);
+		return fwrite_to_file_crc(src, size, n, fp, crc);
+	}
+}
+
+/*!
+ * \brief Dumps dname labels in binary format to given file.
+ *
+ * \param dname Dname whose labels are to be dumped.
+ * \param f Output file.
+ */
+static void knot_labels_dump_binary(const knot_dname_t *dname, FILE *f,
+                                    uint8_t **stream, size_t *stream_size,
+                                    crc_t *crc)
+{
+	dbg_zdump("label count: %d\n", dname->label_count);
+	uint16_t label_count = dname->label_count;
+	/* \todo check the return value */
+	fwrite_wrapper(&label_count, sizeof(label_count), 1, f, stream,
+	               stream_size, crc);
+	/* \todo check the return value */
+	fwrite_wrapper(dname->labels, sizeof(uint8_t), dname->label_count, f,
+	               stream, stream_size, crc);
+}
+
+/*!
+ * \brief Dumps dname in binary format to given file.
+ *
+ * \param dname Dname to be dumped.
+ * \param f Output file.
+ */
+static void knot_dname_dump_binary(const knot_dname_t *dname, FILE *f,
+                                   uint8_t **stream, size_t *stream_size,
+                                   crc_t *crc)
+{
+	uint32_t dname_size = dname->size;
+	/* \todo check the return value */
+	fwrite_wrapper(&dname_size, sizeof(dname_size), 1, f, stream,
+	               stream_size, crc);
+	/* \todo check the return value */
+	fwrite_wrapper(dname->name, sizeof(uint8_t), dname->size, f,
+	               stream, stream_size, crc);
+	dbg_zdump("dname size: %d\n", dname->size);
+	knot_labels_dump_binary(dname, f, stream, stream_size, crc);
+}
+
+/*!< \todo some global variable indicating error! */
+static void dump_dname_with_id(const knot_dname_t *dname, FILE *f,
+                               uint8_t **stream, size_t *stream_size,
+                               crc_t *crc)
+{
+	uint32_t id = dname->id;
+	/* \todo check the return value */
+	fwrite_wrapper(&id, sizeof(id), 1, f, stream, stream_size, crc);
+	knot_dname_dump_binary(dname, f, stream, stream_size, crc);
+/*	if (!fwrite_wrapper_safe(&dname->id, sizeof(dname->id), 1, f)) {
+		return KNOT_ERROR;
+	} */
+}
+
+/*!
+ * \brief Dumps given rdata in binary format to given file.
+ *
+ * \param rdata Rdata to be dumped.
+ * \param type Type of rdata.
+ * \param data Arguments to be propagated.
+ */
+static void knot_rdata_dump_binary(knot_rdata_t *rdata,
+				   uint32_t type, void *data, int use_ids,
+                                   uint8_t **stream, size_t *stream_size,
+                                   crc_t *crc)
+{
+	FILE *f = (FILE *)((arg_t *)data)->arg1;
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	assert(desc != NULL);
+
+	dbg_zdump("Dumping type: %d\n", type);
+
+	if (desc->fixed_items) {
+		assert(desc->length == rdata->count);
+	}
+
+	/* Write rdata count. */
+	/* \todo check the return value */
+	fwrite_wrapper(&(rdata->count),
+	               sizeof(rdata->count), 1, f, stream, stream_size, crc);
+
+	for (int i = 0; i < rdata->count; i++) {
+		if (&(rdata->items[i]) == NULL) {
+			dbg_zdump("Item n. %d is not set!\n", i);
+			continue;
+		}
+		dbg_zdump("Item n: %d\n", i);
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME )	{
+			/*  some temp variables - this is way too long */
+			assert(rdata->items[i].dname != NULL);
+			knot_dname_t *wildcard = NULL;
+
+			if (rdata->items[i].dname->node != NULL &&
+				rdata->items[i].dname->node->owner !=
+				rdata->items[i].dname) {
+				wildcard = rdata->items[i].dname->node->owner;
+			}
+
+			if (use_ids) {
+				/* Write ID. */
+				dbg_zload("%s \n",
+				    knot_dname_to_str(rdata->items[i].dname));
+				assert(rdata->items[i].dname->id != 0);
+
+				uint32_t id = rdata->items[i].dname->id;
+				/* \todo check the return value */
+				fwrite_wrapper(&id,
+				       sizeof(id), 1, f, stream, stream_size,
+				               crc);
+			} else {
+//				assert(rdata->items[i].dname->id != 0);
+				dump_dname_with_id(rdata->items[i].dname,
+				                   f, stream,
+				                   stream_size, crc);
+			}
+
+			/* Write in the zone bit */
+			if (rdata->items[i].dname->node != NULL && !wildcard) {
+				/* \todo check the return value */
+				fwrite_wrapper((uint8_t *)"\1",
+				       sizeof(uint8_t), 1, f, stream,
+				               stream_size, crc);
+			} else {
+				/* \todo check the return value */
+				fwrite_wrapper((uint8_t *)"\0", sizeof(uint8_t),
+				       1, f, stream, stream_size, crc);
+			}
+
+			if (use_ids && wildcard) {
+				/* \todo check the return value */
+				fwrite_wrapper((uint8_t *)"\1",
+				       sizeof(uint8_t), 1, f, stream,
+				       stream_size, crc);
+				uint32_t wildcard_id = wildcard->id;
+				/* \todo check the return value */
+				fwrite_wrapper(&wildcard_id,
+				       sizeof(wildcard_id), 1, f, stream,
+				               stream_size, crc);
+			} else {
+				/* \todo check the return value */
+				fwrite_wrapper((uint8_t *)"\0", sizeof(uint8_t),
+				       1, f, stream,
+				       stream_size, crc);
+			}
+
+		} else {
+			dbg_zdump("Writing raw data. Item nr.: %d\n",
+			                 i);
+			assert(rdata->items[i].raw_data != NULL);
+			/* \todo check the return value */
+			fwrite_wrapper(rdata->items[i].raw_data,
+			               sizeof(uint8_t),
+			       rdata->items[i].raw_data[0] + 2, f,
+			               stream, stream_size, crc);
+
+			dbg_zdump("Written %d long raw data\n",
+					   rdata->items[i].raw_data[0]);
+		}
+	}
+}
+
+/*!
+ * \brief Dumps RRSIG in binary format to given file.
+ *
+ * \param rrsig RRSIG to be dumped.
+ * \param data Arguments to be propagated.
+ */
+static void knot_rrsig_set_dump_binary(knot_rrset_t *rrsig, arg_t *data,
+                                       int use_ids,
+                                       uint8_t **stream, size_t *stream_size,
+                                       crc_t *crc)
+{
+	dbg_zdump("Dumping rrset \\w owner: %s\n",
+	                   knot_dname_to_str(rrsig->owner));
+	assert(rrsig->type == KNOT_RRTYPE_RRSIG);
+	assert(rrsig->rdata);
+	FILE *f = (FILE *)((arg_t *)data)->arg1;
+	/* \todo check the return value */
+	fwrite_wrapper(&rrsig->type, sizeof(rrsig->type), 1, f,
+	               stream, stream_size, crc);
+	fwrite_wrapper(&rrsig->rclass, sizeof(rrsig->rclass), 1, f,
+	               stream, stream_size, crc);
+	fwrite_wrapper(&rrsig->ttl, sizeof(rrsig->ttl), 1, f,
+	               stream, stream_size, crc);
+
+	uint32_t rdata_count = 1;
+	/* Calculate rrset rdata count. */
+	knot_rdata_t *tmp_rdata = rrsig->rdata;
+	while(tmp_rdata->next != rrsig->rdata) {
+		tmp_rdata = tmp_rdata->next;
+		rdata_count++;
+	}
+
+	fwrite_wrapper(&rdata_count, sizeof(rdata_count), 1, f,
+	               stream, stream_size, crc);
+
+	tmp_rdata = rrsig->rdata;
+	while (tmp_rdata->next != rrsig->rdata) {
+		knot_rdata_dump_binary(tmp_rdata, KNOT_RRTYPE_RRSIG, data,
+		                         use_ids, stream, stream_size, crc);
+		tmp_rdata = tmp_rdata->next;
+	}
+	knot_rdata_dump_binary(tmp_rdata, KNOT_RRTYPE_RRSIG, data, use_ids,
+	                       stream, stream_size, crc);
+}
+
+/*!
+ * \brief Dumps RRSet in binary format to given file.
+ *
+ * \param rrset RRSSet to be dumped.
+ * \param data Arguments to be propagated.
+ */
+static void knot_rrset_dump_binary(const knot_rrset_t *rrset, void *data,
+                                   int use_ids,
+                                   uint8_t **stream, size_t *stream_size,
+                                   crc_t *crc)
+{
+	FILE *f = (FILE *)((arg_t *)data)->arg1;
+
+	if (!use_ids) {
+		dump_dname_with_id(rrset->owner, f, stream, stream_size, crc);
+	}
+
+	/* \todo check the return value */
+	fwrite_wrapper(&rrset->type, sizeof(rrset->type), 1, f,
+	               stream, stream_size, crc);
+	fwrite_wrapper(&rrset->rclass, sizeof(rrset->rclass), 1, f,
+	               stream, stream_size, crc);
+	fwrite_wrapper(&rrset->ttl, sizeof(rrset->ttl), 1, f,
+	               stream, stream_size, crc);
+
+	uint32_t rdata_count = 1;
+	uint8_t has_rrsig = rrset->rrsigs != NULL;
+
+	/* Calculate rrset rdata count. */
+	knot_rdata_t *tmp_rdata = rrset->rdata;
+	while(tmp_rdata->next != rrset->rdata) {
+		tmp_rdata = tmp_rdata->next;
+		rdata_count++;
+	}
+
+	fwrite_wrapper(&rdata_count, sizeof(rdata_count), 1, f,
+	               stream, stream_size, crc);
+	fwrite_wrapper(&has_rrsig, sizeof(has_rrsig), 1, f,
+	               stream, stream_size, crc);
+
+	tmp_rdata = rrset->rdata;
+
+	while (tmp_rdata->next != rrset->rdata) {
+		knot_rdata_dump_binary(tmp_rdata, rrset->type, data, use_ids,
+		                       stream, stream_size, crc);
+		tmp_rdata = tmp_rdata->next;
+	}
+	knot_rdata_dump_binary(tmp_rdata, rrset->type, data, use_ids,
+	                       stream, stream_size, crc);
+
+	/* This is now obsolete, although I'd rather not use recursion - that
+	 * would probably not work */
+
+	if (rrset->rrsigs != NULL) {
+		knot_rrsig_set_dump_binary(rrset->rrsigs, data, use_ids,
+		                           stream, stream_size, crc);
+	}
+}
+
+/*!
+ * \brief Dumps all RRSets in node to file in binary format.
+ *
+ * \param node Node to dumped.
+ * \param data Arguments to be propagated.
+ */
+static void knot_node_dump_binary(knot_node_t *node, void *data,
+                                  uint8_t **stream, size_t *stream_size,
+                                  crc_t *crc)
+{
+	arg_t *args = (arg_t *)data;
+	FILE *f = (FILE *)args->arg1;
+
+//	node_count++;
+	/* first write dname */
+	assert(node->owner != NULL);
+
+	/* Write owner ID. */
+	dbg_zdump("Dumping node owned by %s\n",
+	                   knot_dname_to_str(node->owner));
+	assert(node->owner->id != 0);
+	uint32_t owner_id = node->owner->id;
+	/* \todo check the return value */
+	fwrite_wrapper(&owner_id, sizeof(owner_id), 1, f, stream, stream_size,
+	               crc);
+
+	if (knot_node_parent(node, 0) != NULL) {
+		uint32_t parent_id = knot_dname_id(
+				knot_node_owner(knot_node_parent(node, 0)));
+		fwrite_wrapper(&parent_id, sizeof(parent_id), 1, f,
+		               stream, stream_size, crc);
+	} else {
+		uint32_t parent_id = 0;
+		fwrite_wrapper(&parent_id, sizeof(parent_id), 1, f,
+		               stream, stream_size, crc);
+	}
+
+	fwrite_wrapper(&(node->flags), sizeof(node->flags), 1, f,
+	               stream, stream_size, crc);
+
+	dbg_zdump("Written flags: %u\n", node->flags);
+
+	if (knot_node_nsec3_node(node, 0) != NULL) {
+		uint32_t nsec3_id =
+			knot_node_owner(knot_node_nsec3_node(node, 0))->id;
+		fwrite_wrapper(&nsec3_id, sizeof(nsec3_id), 1, f,
+		               stream, stream_size, crc);
+		dbg_zdump("Written nsec3 node id: %u\n",
+			 knot_node_owner(knot_node_nsec3_node(node, 0))->id);
+	} else {
+		uint32_t nsec3_id = 0;
+		fwrite_wrapper(&nsec3_id, sizeof(nsec3_id), 1, f,
+		               stream, stream_size, crc);
+	}
+
+	/* Now we need (or do we?) count of rrsets to be read
+	 * but that number is yet unknown */
+
+	uint16_t rrset_count = node->rrset_count;
+	fwrite_wrapper(&rrset_count, sizeof(rrset_count), 1, f,
+	               stream, stream_size, crc);
+
+	/* CLEANUP */
+//	const skip_node_t *skip_node = skip_first(node->rrsets);
+
+	const knot_rrset_t **node_rrsets = knot_node_rrsets(node);
+	for (int i = 0; i < rrset_count; i++)
+	{
+		knot_rrset_dump_binary(node_rrsets[i], data, 1,
+		                       stream, stream_size, crc);
+	}
+
+	/* CLEANUP */
+//	if (skip_node == NULL) {
+//		/* we can return, count is set to 0 */
+//		return;
+//	}
+
+//	knot_rrset_t *tmp;
+
+//	do {
+//		tmp = (knot_rrset_t *)skip_node->value;
+//		knot_rrset_dump_binary(tmp, data, 1);
+//	} while ((skip_node = skip_next(skip_node)) != NULL);
+
+	free(node_rrsets);
+
+	dbg_zdump("Position after all rrsets: %ld\n", ftell(f));
+	dbg_zdump("Writing here: %ld\n", ftell(f));
+	dbg_zdump("Function ends with: %ld\n\n", ftell(f));
+}
+
+/*!
+ * \brief Checks if zone uses DNSSEC and/or NSEC3
+ *
+ * \param zone Zone to be checked.
+ *
+ * \retval 0 if zone is not secured.
+ * \retval 2 if zone uses NSEC3
+ * \retval 1 if zone uses NSEC
+ */
+static int zone_is_secure(knot_zone_contents_t *zone)
+{
+	if (knot_node_rrset(knot_zone_contents_apex(zone),
+			      KNOT_RRTYPE_DNSKEY) == NULL) {
+		return 0;
+	} else {
+		if (knot_node_rrset(knot_zone_contents_apex(zone),
+				      KNOT_RRTYPE_NSEC3PARAM) != NULL) {
+			return 2;
+		} else {
+			return 1;
+		}
+	}
+}
+
+/*!
+ * \brief Checks if last node in NSEC/NSEC3 chain points to first node in the
+ *        chain and prints possible errors.
+ *
+ * \param handler Semantic error handler.
+ * \param zone Current zone.
+ * \param last_node Last node in NSEC/NSEC3 chain.
+ * \param do_checks Level of semantic checks.
+ */
+static void log_cyclic_errors_in_zone(err_handler_t *handler,
+				      knot_zone_contents_t *zone,
+				      knot_node_t *last_node,
+				      const knot_node_t *first_nsec3_node,
+				      const knot_node_t *last_nsec3_node,
+				      char do_checks)
+{
+	if (do_checks == 3) {
+		/* Each NSEC3 node should only contain one RRSET. */
+		assert(last_nsec3_node && first_nsec3_node);
+		const knot_rrset_t *nsec3_rrset =
+			knot_node_rrset(last_nsec3_node,
+		                              KNOT_RRTYPE_NSEC3);
+		if (nsec3_rrset == NULL) {
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_NSEC3_RDATA_CHAIN);
+			return;
+		}
+
+		/* check that next dname is in the zone */
+		uint8_t *next_dname_decoded = NULL;
+		size_t real_size = 0;
+
+		if (((real_size = base32hex_encode_alloc(((char *)
+			rdata_item_data(&(nsec3_rrset->rdata->items[4]))) + 1,
+			rdata_item_size(&nsec3_rrset->rdata->items[4]) - 1,
+			(char **)&next_dname_decoded)) <= 0) ||
+			(next_dname_decoded == NULL)) {
+			fprintf(stderr, "Could not encode base32 string!\n");
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_NSEC3_RDATA_CHAIN);
+			return;
+		}
+
+		/* This is why allocate maximum length of decoded string + 1 */
+		memmove(next_dname_decoded + 1, next_dname_decoded, real_size);
+		next_dname_decoded[0] = real_size;
+
+		/* Local allocation, will be discarded. */
+		knot_dname_t *next_dname =
+			knot_dname_new_from_wire(next_dname_decoded,
+						   real_size + 1, NULL);
+		if (next_dname == NULL) {
+			fprintf(stderr, "Could not allocate dname!\n");
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_ALLOC);
+			return;
+		}
+
+		free(next_dname_decoded);
+
+		/*! \todo Free result and dname! */
+		if (knot_dname_cat(next_dname,
+			     knot_node_owner(knot_zone_contents_apex(zone))) ==
+		                NULL) {
+			fprintf(stderr, "Could not concatenate dnames!\n");
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_NSEC3_RDATA_CHAIN);
+			return;
+		}
+
+		/* Check it points somewhere first. */
+		if (knot_zone_contents_find_nsec3_node(zone, next_dname) == NULL) {
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_NSEC3_RDATA_CHAIN);
+		}
+
+		/* Compare with the actual first NSEC3 node. */
+		if (knot_dname_compare(first_nsec3_node->owner,
+		                         next_dname) != 0) {
+			err_handler_handle_error(handler, last_nsec3_node,
+						 ZC_ERR_NSEC3_RDATA_CHAIN);
+		}
+
+		/* Directly discard. */
+		knot_dname_free(&next_dname);
+
+	} else if (do_checks == 2 ) {
+		if (last_node == NULL) {
+			err_handler_handle_error(handler, last_node,
+				ZC_ERR_NSEC_RDATA_CHAIN_NOT_CYCLIC);
+				return;
+		} else {
+			const knot_rrset_t *nsec_rrset =
+				knot_node_rrset(last_node,
+						  KNOT_RRTYPE_NSEC);
+
+			if (nsec_rrset == NULL) {
+				err_handler_handle_error(handler, last_node,
+					 ZC_ERR_NSEC_RDATA_CHAIN_NOT_CYCLIC);
+				return;
+			}
+
+			const knot_dname_t *next_dname =
+				knot_rdata_item(
+				knot_rrset_rdata(nsec_rrset), 0)->dname;
+			assert(next_dname);
+
+			const knot_dname_t *apex_dname =
+				knot_node_owner(knot_zone_contents_apex(zone));
+			assert(apex_dname);
+
+			if (knot_dname_compare(next_dname, apex_dname) !=0) {
+				err_handler_handle_error(handler, last_node,
+					 ZC_ERR_NSEC_RDATA_CHAIN_NOT_CYCLIC);
+			}
+		}
+	}
+}
+
+/*!
+ * \brief Safe wrapper around fwrite.
+ *
+ * \param dst Destination pointer.
+ * \param size Size of element to be written.
+ * \param n Number of elements to be written.
+ * \param fp File to write to.
+ *
+ * \retval > 0 if succesfull.
+ * \retval 0 if failed.
+ */
+//static inline int fwrite_wrapper_safe(const void *src,
+//                                      size_t size, size_t n, FILE *fp)
+//{
+//	int rc = fwrite_wrapper(src, size, n, fp);
+//	if (rc != n) {
+//		fprintf(stderr, "fwrite_wrapper: invalid write %d (expected %zu)\n", rc,
+//			n);
+//	}
+
+//	return rc == n;
+//}
+
+static void dump_dname_from_tree(knot_dname_t *dname,
+				 void *data)
+{
+	arg_t *arg = (arg_t *)data;
+	FILE *f = (FILE *)arg->arg1;
+	crc_t *crc = (crc_t*)arg->arg2;
+	dump_dname_with_id(dname, f, NULL, NULL, crc);
+}
+
+static int knot_dump_dname_table(const knot_dname_table_t *dname_table,
+				   FILE *f, crc_t *crc)
+{
+	arg_t arg;
+	arg.arg1 = f;
+	arg.arg2 = crc;
+	/* Go through the tree and dump each dname along with its ID. */
+	knot_dname_table_tree_inorder_apply(dname_table,
+					    dump_dname_from_tree, &arg);
+	/* CLEANUP */
+//	TREE_FORWARD_APPLY(dname_table->tree, dname_table_node, avl,
+//			   dump_dname_from_tree, (void *)f);
+
+	return KNOT_EOK;
+}
+
+static void save_node_from_tree(knot_node_t *node, void *data)
+{
+	arg_t *arg = (arg_t *)data;
+	/* Increment node count */
+	(*((uint32_t *)(arg->arg1)))++;
+	/* Save the first node only */
+	if (arg->arg2 == NULL) {
+		arg->arg2 = (void *)node;
+	}
+	arg->arg3 = (void *)node;
+}
+
+static void dump_node_to_file(knot_node_t *node, void *data)
+{
+	arg_t *arg = (arg_t *)data;
+	knot_node_dump_binary(node, data, NULL, NULL, (crc_t *)arg->arg7);
+}
+
+int knot_zdump_binary(knot_zone_contents_t *zone, const char *filename,
+			int do_checks, const char *sfilename)
+{
+	/* Open .new file. */
+	char new_path[strlen(filename) + strlen(".new") + 1];
+	memcpy(new_path, filename, strlen(filename) + 1);
+	strcat(new_path, ".new");
+	mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
+	int fd = open(new_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+	if (fd == -1) {
+		return KNOT_EBADARG;
+	}
+
+	FILE *f = fdopen(fd, "wb");
+	assert(f);
+
+	/* CLEANUP */
+//	skip_list_t *encloser_list = skip_create_list(compare_pointers);
+	arg_t arguments;
+	/* Memory to be derefenced in the save_node_from_tree function. */
+	uint32_t node_count = 0;
+	arguments.arg1 = &node_count;
+	arguments.arg2 = NULL;
+
+	/* Count number of normal nodes. */
+	knot_zone_contents_tree_apply_inorder(zone, save_node_from_tree, &arguments);
+	/* arg1 is now count of normal nodes */
+	uint32_t normal_node_count = *((uint32_t *)arguments.arg1);
+
+	node_count = 0;
+	arguments.arg1 = &node_count;
+	arguments.arg2 = NULL;
+
+	/* Count number of NSEC3 nodes. */
+	knot_zone_contents_nsec3_apply_inorder(zone, save_node_from_tree, &arguments);
+	uint32_t nsec3_node_count = *((uint32_t *)arguments.arg1);
+	/* arg2 is the first NSEC3 node - used in sem checks. */
+	/* arg3 is the last NSEC3 node - used in sem checks. */
+	const knot_node_t *first_nsec3_node = (knot_node_t *)arguments.arg2;
+	const knot_node_t *last_nsec3_node = (knot_node_t *)arguments.arg3;
+
+	if (do_checks && zone_is_secure(zone)) {
+		do_checks += zone_is_secure(zone);
+	}
+
+	err_handler_t *handler = NULL;
+
+	if (do_checks) {
+		handler = handler_new(1, 0, 1, 1, 1);
+		if (handler == NULL) {
+			/* disable checks and we can continue */
+			do_checks = 0;
+		} else { /* Do check for SOA right now */
+			if (knot_node_rrset(knot_zone_contents_apex(zone),
+					      KNOT_RRTYPE_SOA) == NULL) {
+				err_handler_handle_error(handler,
+							 knot_zone_contents_apex(zone),
+							 ZC_ERR_MISSING_SOA);
+			}
+		}
+
+		knot_node_t *last_node = NULL;
+
+		zone_do_sem_checks(zone, do_checks, handler, &last_node);
+		log_cyclic_errors_in_zone(handler, zone, last_node,
+		                          first_nsec3_node, last_nsec3_node,
+		                          do_checks);
+		err_handler_log_all(handler);
+		free(handler);
+	}
+
+	crc_t crc = crc_init();
+
+	/* Start writing header - magic bytes. */
+	static const uint8_t MAGIC[MAGIC_LENGTH] = MAGIC_BYTES;
+	fwrite_wrapper(&MAGIC, sizeof(uint8_t), MAGIC_LENGTH, f, NULL, NULL,
+	               &crc);
+
+	/* Write source file length. */
+	uint32_t sflen = 0;
+	if (sfilename) {
+		sflen = strlen(sfilename) + 1;
+	}
+	fwrite_wrapper(&sflen, sizeof(uint32_t), 1, f, NULL, NULL, &crc);
+
+	/* Write source file. */
+	fwrite_wrapper(sfilename, sflen, 1, f, NULL, NULL, &crc);
+
+	/* Notice: End of header,
+	 */
+
+	/* Start writing compiled data. */
+	fwrite_wrapper(&normal_node_count, sizeof(normal_node_count), 1, f,
+	               NULL, NULL, &crc);
+	fwrite_wrapper(&nsec3_node_count, sizeof(nsec3_node_count), 1, f,
+	               NULL, NULL, &crc);
+	uint32_t auth_node_count = zone->node_count;
+	fwrite_wrapper(&auth_node_count,
+	       sizeof(auth_node_count), 1, f, NULL, NULL, &crc);
+
+	/* Write total number of dnames */
+	assert(zone->dname_table);
+	uint32_t total_dnames = zone->dname_table->id_counter;
+	fwrite_wrapper(&total_dnames,
+	       sizeof(total_dnames), 1, f, NULL, NULL, &crc);
+
+	/* Write dname table. */
+	if (knot_dump_dname_table(zone->dname_table, f, &crc)
+	    != KNOT_EOK) {
+		return KNOT_ERROR;
+	}
+
+	arguments.arg1 = (void *)f;
+	arguments.arg3 = zone;
+	arguments.arg7 = &crc;
+
+	/* TODO is there a way how to stop the traversal upon error? */
+	knot_zone_contents_tree_apply_inorder(zone, dump_node_to_file,
+				       (void *)&arguments);
+
+	knot_zone_contents_nsec3_apply_inorder(zone, dump_node_to_file,
+					(void *)&arguments);
+	fclose(f);
+
+	crc = crc_finalize(crc);
+	/* Write CRC to separate .crc file. */
+	/*!< \todo There is now function doing this. */
+	char *crc_path =
+		malloc(sizeof(char) * (strlen(filename) + strlen(".crc") + 1));
+	if (unlikely(!crc_path)) {
+		close(fd);
+		return KNOT_ENOMEM;
+	}
+	memset(crc_path, 0,
+	       sizeof(char) * (strlen(filename) + strlen(".crc") + 1));
+	memcpy(crc_path, filename, sizeof(char) * strlen(filename));
+
+	crc_path = strcat(crc_path, ".crc");
+	FILE *f_crc = fopen(crc_path, "w");
+	if (unlikely(!f_crc)) {
+		dbg_zload("knot_zload_open: failed to open '%s'\n",
+		                   crc_path);
+		close(fd);
+		free(crc_path);
+		return ENOENT;
+	}
+	free(crc_path);
+
+	fprintf(f_crc, "%lu\n", (unsigned long)crc);
+	fclose(f_crc);
+
+	close(fd);
+	mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
+	fd = open(filename, O_WRONLY | O_CREAT, mode);
+	if (fd == -1) {
+		fprintf(stderr, "%s\n", strerror(errno));
+		fprintf(stderr, "Could not open destination file! Use '%s' "
+		        "file instead.\n", new_path);
+		return KNOT_ERROR;
+	}
+
+	/* Try to obtain exclusive lock for originally given file. */
+	if (fcntl(fd, F_SETLK, knot_file_lock(F_WRLCK, SEEK_SET)) == -1) {
+		fprintf(stderr, "Could not lock destination file for write! "
+		        "Use '%s' file instead.\n", new_path);
+		close(fd);
+		return KNOT_ERROR;
+	}
+
+	/* Move .new file to original file. */
+	if (rename(new_path, filename) != 0) {
+		fprintf(stderr, "Could not move to originally given file! "
+		        "Use '%s' file instead.\n", new_path);
+		close(fd);
+		return KNOT_ERROR;
+	}
+
+	/* Release the lock. */
+	if (fcntl(fd, F_SETLK, knot_file_lock(F_UNLCK, SEEK_SET)) == -1) {
+		fprintf(stderr, "Could not unlock destination file!\n");
+		return KNOT_ERROR;
+	}
+
+	close(fd);
+
+	return KNOT_EOK;
+}
+
+int knot_zdump_rrset_serialize(const knot_rrset_t *rrset, uint8_t **stream,
+                                 size_t *size)
+{
+	if (stream == NULL || *stream != NULL || rrset == NULL ||
+	    size == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	*size = 0;
+	arg_t arguments;
+	memset(&arguments, 0, sizeof(arg_t));
+
+	knot_rrset_dump_binary(rrset, &arguments, 0, stream, size, NULL);
+
+	return KNOT_EOK;
+}
+
+static char *knot_zdump_crc_file(const char* filename)
+{
+	char *crc_path =
+		malloc(sizeof(char) * (strlen(filename) +
+		strlen(".crc") + 1));
+	CHECK_ALLOC_LOG(crc_path, NULL);
+	memset(crc_path, 0,
+	       sizeof(char) * (strlen(filename) +
+	       strlen(".crc") + 1));
+	memcpy(crc_path, filename,
+	       sizeof(char) * strlen(filename));
+	crc_path = strcat(crc_path, ".crc");
+	return crc_path;
+}
+
+int knot_zdump_dump_and_swap(knot_zone_contents_t *zone,
+                             const char *temp_zonedb,
+                             const char *destination_zonedb,
+                             const char *sfilename)
+{
+	int rc = knot_zdump_binary(zone, temp_zonedb, 0, sfilename);
+
+	if (rc != KNOT_EOK) {
+		dbg_zdump("Failed to save the zone to binary zone db %s."
+		                 "\n", temp_zonedb);
+		return KNOT_ERROR;
+	}
+
+	/*! \todo this would also need locking as well. */
+	rc = remove(destination_zonedb);
+	if (rc == 0 || (rc != 0 && errno == ENOENT)) {
+
+		/* Delete old CRC file. */
+		char *destination_zonedb_crc =
+			knot_zdump_crc_file(destination_zonedb);
+		if (destination_zonedb_crc == NULL) {
+			return KNOT_ENOMEM;
+		}
+		remove(destination_zonedb_crc);
+
+		/* Move CRC file. */
+		char *temp_zonedb_crc =
+			knot_zdump_crc_file(temp_zonedb);
+		if (temp_zonedb_crc == NULL) {
+			return KNOT_ENOMEM;
+		}
+
+		if (rename(temp_zonedb_crc, destination_zonedb_crc) != 0) {
+			dbg_zdump("Failed to replace old zonedb CRC %s "
+					 "with new CRC zone file %s.\n",
+					 destination_zonedb_crc,
+					 temp_zonedb_crc);
+			return KNOT_ERROR;
+		}
+		free(temp_zonedb_crc);
+		free(destination_zonedb_crc);
+
+		/* Rename zonedb. */
+		if (rename(temp_zonedb, destination_zonedb) != 0) {
+			dbg_zdump("Failed to replace old zonedb %s "
+					 "with new zone file %s.\n",
+					 temp_zonedb,
+					 destination_zonedb);
+			/*! \todo with proper locking, this shouldn't happen,
+			 *        revise it later on.
+			 */
+			return KNOT_ERROR;
+		}
+	} else {
+		dbg_zdump("Failed to replace old zonedb '%s'', %s.\n",
+				 destination_zonedb, strerror(errno));
+		return KNOT_ERROR;
+	}
+
+	return KNOT_EOK;
+}
diff --git a/src/knot/zone/zone-dump.h b/src/knot/zone/zone-dump.h
new file mode 100644
index 0000000..daf6c18
--- /dev/null
+++ b/src/knot/zone/zone-dump.h
@@ -0,0 +1,94 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file zone-dump.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Functions for dumping zone to binary file.
+ *
+ * \addtogroup dnslib
+ * @{
+ */
+
+#ifndef _KNOT_ZONEDUMP_H_
+#define _KNOT_ZONEDUMP_H_
+
+#include "common/crc.h"
+#include "libknot/zone/zone.h"
+
+/*!
+ * \brief Zone loader enums.
+ */
+enum {
+	MAGIC_LENGTH = 7 /*!< Compiled zone magic length. */
+};
+
+/*! \brief Magic identifier: { "knot", maj_ver, min_ver, revision } */
+#define MAGIC_BYTES {'k', 'n', 'o', 't', '0', '8', '0'}
+
+/*!
+ * \brief Dumps given zone to binary file.
+ *
+ * \param zone Zone to be saved.
+ * \param filename Name of file to be created.
+ * \param do_checks Set to 1 to enable checking the zone for semantic errors.
+ * \param sfilename Source filename of the text zone file.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EBADARG if the file cannot be opened for writing.
+ */
+int knot_zdump_binary(knot_zone_contents_t *zone, const char *filename,
+                      int do_checks, const char *sfilename);
+
+/*!
+ * \brief Serializes RRSet into binary stream. Expects NULL pointer, memory
+ *        is handled inside function.
+ *
+ * \param rrset RRSet to be serialized.
+ * \param stream Stream containing serialized RRSet.
+ * \param size Length of created stream.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EBADARG if wrong arguments are supplied.
+ * \retval KNOT_ENOMEM on memory error.
+ */
+int knot_zdump_rrset_serialize(const knot_rrset_t *rrset, uint8_t **stream,
+                               size_t *size);
+
+/*!
+ * \brief Serializes RRSet into binary stream. Expects NULL pointer, memory
+ *        is handled inside function.
+ *
+ * \param rrset RRSet to be serialized.
+ * \param stream Stream containing serialized RRSet.
+ * \param size Length of created stream.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EBADARG if wrong arguments are supplied.
+ * \retval KNOT_ENOMEM on memory error.
+ */
+int knot_zdump_rrset_serialize(const knot_rrset_t *rrset, uint8_t **stream,
+                               size_t *size);
+
+int knot_zdump_dump_and_swap(knot_zone_contents_t *zone,
+                             const char *temp_zonedb,
+                             const char *destination_zonedb,
+                             const char *sfilename);
+
+#endif /* _KNOT_ZONEDUMP_H_ */
+
+/*! @} */
diff --git a/src/knot/zone/zone-load.c b/src/knot/zone/zone-load.c
new file mode 100644
index 0000000..9ab0e8d
--- /dev/null
+++ b/src/knot/zone/zone-load.c
@@ -0,0 +1,1209 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include "common/crc.h"
+#include "libknot/common.h"
+#include "knot/other/debug.h"
+#include "knot/zone/zone-load.h"
+#include "knot/zone/zone-dump.h"
+#include "libknot/libknot.h"
+
+/*!
+ * \brief Compares two time_t values.
+ *
+ * \param x First time_t value to be compared.
+ * \param y Second time_t value to be compared.
+ *
+ * \retval 0 when times are the some.
+ * \retval 1 when y < x.
+ * \retval -1 when x > y.
+ */
+static int timet_cmp(time_t x, time_t y)
+{
+	/* Calculate difference in the scale of seconds. */
+	long diff = x - y;
+
+	/* X and Y are equal. */
+	if (diff == 0) {
+		return 0;
+	}
+
+	/* X is newer. */
+	if (diff > 0) {
+		return 1;
+	}
+
+	/* Y is newer. */
+	return -1;
+}
+
+/*!
+ * \brief Safe wrapper around fread.
+ *
+ * \param dst Destination pointer.
+ * \param size Size of element to be read.
+ * \param n Number of elements to be read.
+ * \param fp File to read from.
+ *
+ * \retval > 0 if succesfull.
+ * \retval 0 if failed.
+ */
+static inline int fread_safe_from_file(void *dst,
+                                       size_t size, size_t n, FILE *fp)
+{
+	int rc = fread(dst, size, n, fp);
+	if (rc != n) {
+		fprintf(stderr, "fread: invalid read %d (expected %zu)\n", rc,
+			n);
+	}
+
+	return rc == n;
+}
+
+static uint8_t *knot_zload_stream = NULL;
+static size_t knot_zload_stream_remaining = 0;
+static size_t knot_zload_stream_size = 0;
+
+static inline int read_from_stream(void *dst,
+                                   size_t size, size_t n, FILE *fp)
+{
+	if (knot_zload_stream_remaining < (size * n)) {
+		return 0;
+	}
+
+	memcpy(dst,
+	       knot_zload_stream +
+	       (knot_zload_stream_size - knot_zload_stream_remaining),
+	       size * n);
+	knot_zload_stream_remaining -= size * n;
+
+	return 1;
+}
+
+static int (*fread_wrapper)(void *dst, size_t size, size_t n, FILE *fp);
+
+/*! \note Contents of dump file:
+ * MAGIC(knotxx) NUMBER_OF_NORMAL_NODES NUMBER_OF_NSEC3_NODES
+ * [normal_nodes] [nsec3_nodes]
+ * node has following format:
+ * owner_size owner_wire owner_label_size owner_labels owner_id
+ * node_flags node_rrset_count [node_rrsets]
+ * rrset has following format:
+ * rrset_type rrset_class rrset_ttl rrset_rdata_count rrset_rrsig_count
+ * [rrset_rdata] [rrset_rrsigs]
+ * rdata can either contain full dnames (that is with labels but without ID)
+ * or dname ID, if dname is in the zone
+ * or raw data stored like this: data_len [data]
+ */
+
+enum { DNAME_MAX_WIRE_LENGTH = 256 };
+
+/*!
+ * \brief Helper function. Frees rdata items and temporary array of items.
+ *
+ * \param rdata Rdata to be freed.
+ * \param items Items to be freed.
+ * \param count Current count of rdata items.
+ * \param type RRSet type.
+ */
+static void load_rdata_purge(knot_rdata_t *rdata,
+			     knot_rdata_item_t *items,
+			     int count,
+			     knot_rrtype_descriptor_t *desc,
+			     uint16_t type)
+{
+	/* Increase refcount manually, as the set_items() doesn't see the dname
+	 * type and thus is unable to increment refcounter.
+	 */
+	for (int i = 0; i < count; ++i) {
+		switch(desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+				knot_dname_retain(items[i].dname);
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* Copy items to rdata and free the temporary rdata. */
+	knot_rdata_set_items(rdata, items, count);
+	knot_rdata_deep_free(&rdata, type, 1);
+	free(items);
+}
+
+static knot_dname_t *read_dname_with_id(FILE *f)
+{
+	knot_dname_t *ret = knot_dname_new();
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	/* Read ID. */
+	uint32_t dname_id = 0;
+	if (!fread_wrapper(&dname_id, sizeof(dname_id), 1, f)) {
+		knot_dname_release(ret);
+		return NULL;
+	}
+
+	ret->id = dname_id;
+	dbg_zload("loaded: dname id: %u\n", dname_id);
+
+	/* Read size of dname. */
+	uint32_t dname_size = 0;
+	if (!fread_wrapper(&dname_size, sizeof(dname_size), 1, f)) {
+		knot_dname_release(ret);
+		return NULL;
+	}
+	ret->size = dname_size;
+	dbg_zload("loaded: dname length: %u\n", ret->size);
+
+	assert(ret->size <= DNAME_MAX_WIRE_LENGTH);
+
+	/* Read wireformat of dname. */
+	ret->name = malloc(sizeof(uint8_t) * ret->size);
+	if (ret->name == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_release(ret);
+		return NULL;
+	}
+
+	if (!fread_wrapper(ret->name, sizeof(uint8_t), ret->size, f)) {
+		knot_dname_release(ret);
+		return NULL;
+	}
+
+	/* Read labels. */
+	uint16_t label_count = 0;
+	if (!fread_wrapper(&label_count, sizeof(label_count), 1, f)) {
+		knot_dname_release(ret);
+		return NULL;
+	}
+
+	ret->label_count = label_count;
+
+	ret->labels = malloc(sizeof(uint8_t) * ret->label_count);
+	if (ret->labels == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_release(ret);
+		return NULL;
+	}
+
+	if (!fread_wrapper(ret->labels, sizeof(uint8_t), ret->label_count, f)) {
+		free(ret->name);
+		free(ret);
+		return NULL;
+	}
+
+	dbg_zload("loaded: %s (id: %d)\n", knot_dname_to_str(ret),
+			 ret->id);
+
+	return ret;
+}
+
+/*!
+ * \brief Load rdata in binary format from file.
+ *
+ * \param type Type of RRSet containing read rdata.
+ * \param f File to read binary data from.
+ *
+ * \return Pointer to read and created rdata on success, NULL otherwise.
+ */
+static knot_rdata_t *knot_load_rdata(uint16_t type, FILE *f,
+                                         knot_dname_t **id_array,
+                                         int use_ids)
+{
+	knot_rdata_t *rdata = knot_rdata_new();
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	assert(desc != NULL);
+
+
+	/* First, should read rdata count. */
+
+	uint32_t rdata_count = 0;
+
+	if(!fread_wrapper(&rdata_count, sizeof(rdata_count), 1, f)) {
+		return NULL;
+	}
+
+	knot_rdata_item_t *items =
+		malloc(sizeof(knot_rdata_item_t) * rdata_count);
+
+	if (desc->fixed_items) {
+		assert(desc->length == rdata_count);
+	}
+
+	uint16_t raw_data_length;
+
+	dbg_zload("Reading %d items\n", rdata_count);
+
+	dbg_zload("current type: %s\n", knot_rrtype_to_string(type));
+
+	for (int i = 0; i < rdata_count; i++) {
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME )	{
+
+			/* TODO maybe this does not need to be stored this big*/
+
+			uint32_t dname_id = 0;
+			uint8_t has_wildcard = 0;
+			uint8_t in_the_zone = 0;
+
+			if (use_ids) {
+				if(!fread_wrapper(&dname_id, sizeof(dname_id), 1, f)) {
+					load_rdata_purge(rdata, items, i, desc, type);
+					return NULL;
+				}
+
+				/* Store reference do dname. */
+				knot_dname_retain(id_array[dname_id]);
+				items[i].dname = id_array[dname_id];
+			} else {
+				items[i].dname = read_dname_with_id(f);
+			}
+
+			if(!fread_wrapper(&in_the_zone, sizeof(in_the_zone),
+			               1, f)) {
+				load_rdata_purge(rdata, items, i, desc, type);
+				return NULL;
+			}
+
+			if(!fread_wrapper(&has_wildcard, sizeof(uint8_t),
+				       1, f)) {
+				load_rdata_purge(rdata, items, i, desc, type);
+				return NULL;
+			}
+
+			if (use_ids && has_wildcard) {
+				if(!fread_wrapper(&dname_id, sizeof(dname_id),
+					       1, f)) {
+					load_rdata_purge(rdata, items,
+							 i, desc, type);
+					return NULL;
+				}
+				items[i].dname->node =
+						id_array[dname_id]->node;
+			} else if (use_ids && !in_the_zone) { /* destroy the node */
+				if (id_array[dname_id]->node != NULL) {
+					knot_node_free(&id_array[dname_id]->
+							 node, 0, 0);
+				}
+				/* Also sets node to NULL! */
+			}
+			assert(items[i].dname);
+		} else {
+			if (!fread_wrapper(&raw_data_length,
+					sizeof(raw_data_length), 1, f)) {
+				load_rdata_purge(rdata, items, i, desc, type);
+				return NULL;
+			}
+
+			items[i].raw_data =
+				malloc(sizeof(uint8_t) * (raw_data_length + 2));
+			items[i].raw_data[0] = raw_data_length;
+
+			if (!fread_wrapper(items[i].raw_data + 1, sizeof(uint8_t),
+			      raw_data_length, f)) {
+				load_rdata_purge(rdata, items, i + 1, desc, type);
+				return NULL;
+			}
+			dbg_zload("read raw_data len %d\n", raw_data_length);
+		}
+	}
+
+	/* Each item has refcount already incremented for saving in rdata. */
+	if (knot_rdata_set_items(rdata, items, rdata_count) != 0) {
+		fprintf(stderr, "zoneload: Could not set items "
+			"when loading rdata.\n");
+	}
+
+	free(items);
+
+	dbg_zload("knot_load_rdata: all %d items read\n",
+			 desc->length);
+
+	assert(rdata->count == rdata_count);
+
+	rdata->count = rdata_count;
+
+	return rdata;
+}
+
+/*!
+ * \brief Loads RRSIG from binary file.
+ *
+ * \param f File to read from.
+ *
+ * \return pointer to created and read RRSIG on success, NULL otherwise.
+ */
+static knot_rrset_t *knot_load_rrsig(FILE *f, knot_dname_t **id_array,
+                                         int use_ids)
+{
+	knot_rrset_t *rrsig;
+
+	uint16_t rrset_type;
+	uint16_t rrset_class;
+	uint32_t rrset_ttl;
+
+	uint32_t rdata_count;
+
+	if (!fread_wrapper(&rrset_type, sizeof(rrset_type), 1, f)) {
+		return NULL;
+	}
+
+	if (rrset_type != KNOT_RRTYPE_RRSIG) {
+		fprintf(stderr, "!! Error: rrsig has wrong type\n");
+		return NULL;
+	}
+	dbg_zload("rrset type: %d\n", rrset_type);
+	if (!fread_wrapper(&rrset_class, sizeof(rrset_class), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("rrset class %d\n", rrset_class);
+
+	if (!fread_wrapper(&rrset_ttl, sizeof(rrset_ttl), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("rrset ttl %d\n", rrset_ttl);
+
+	if (!fread_wrapper(&rdata_count, sizeof(rdata_count), 1, f)) {
+		return NULL;
+	}
+
+	rrsig = knot_rrset_new(NULL, rrset_type, rrset_class, rrset_ttl);
+
+	knot_rdata_t *tmp_rdata;
+
+	dbg_zload("loading %d rdata entries\n", rdata_count);
+
+	for (int i = 0; i < rdata_count; i++) {
+		tmp_rdata = knot_load_rdata(KNOT_RRTYPE_RRSIG, f,
+					      id_array, use_ids);
+		if (tmp_rdata) {
+			knot_rrset_add_rdata(rrsig, tmp_rdata);
+		} else {
+			knot_rrset_deep_free(&rrsig, 0, 1, 1);
+			return NULL;
+		}
+	}
+
+	return rrsig;
+}
+
+/*!
+ * \brief Loads RRSet from binary file.
+ *
+ * \param f File to read from.
+ *
+ * \return pointer to created and read RRSet on success, NULL otherwise.
+ */
+static knot_rrset_t *knot_load_rrset(FILE *f, knot_dname_t **id_array,
+                                         int use_ids)
+{
+	knot_rrset_t *rrset = NULL;
+
+	uint16_t rrset_type = 0;
+	uint16_t rrset_class = 0;
+	uint32_t rrset_ttl = 0;
+
+	uint32_t rdata_count = 0;
+	uint8_t rrsig_count = 0;
+
+	knot_dname_t *owner = NULL;
+
+	if (!use_ids) {
+		dbg_zload("Loading owner of new RRSet from wire.\n");
+		owner = read_dname_with_id(f);
+	}
+
+	if (!fread_wrapper(&rrset_type, sizeof(rrset_type), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("Zone load: rrset load: type: %u\n", rrset_type);
+	if (!fread_wrapper(&rrset_class, sizeof(rrset_class), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("Zone load: rrset class: type: %u\n", rrset_class);
+	if (!fread_wrapper(&rrset_ttl, sizeof(rrset_ttl), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("Zone load: rrset ttl: type: %u\n", rrset_ttl);
+	if (!fread_wrapper(&rdata_count, sizeof(rdata_count), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("Zone load: rrset load: rdata count: %u\n", rdata_count);
+	if (!fread_wrapper(&rrsig_count, sizeof(rrsig_count), 1, f)) {
+		return NULL;
+	}
+	dbg_zload("Zone load: rrset load: type: %u\n", rrset_type);
+
+	dbg_zload("Loading RRSet owned by: %s\n",
+	          knot_dname_to_str(owner));
+
+	rrset = knot_rrset_new(owner, rrset_type, rrset_class, rrset_ttl);
+
+	if (!use_ids) {
+		/* Directly release if allocated locally. */
+		knot_dname_release(owner);
+		owner = 0;
+	}
+
+	dbg_zload("RRSet type: %d\n", rrset->type);
+
+	knot_rdata_t *tmp_rdata = NULL;
+
+	for (int i = 0; i < rdata_count; i++) {
+		tmp_rdata = knot_load_rdata(rrset->type, f,
+					      id_array, use_ids);
+		if (tmp_rdata) {
+			knot_rrset_add_rdata(rrset, tmp_rdata);
+		} else {
+			knot_rrset_deep_free(&rrset, 0, 1, 1);
+			return NULL;
+		}
+	}
+
+	knot_rrset_t *tmp_rrsig = NULL;
+
+	dbg_zload("Reading: %d RRSIGs\n", rrsig_count);
+	if (rrsig_count) {
+		tmp_rrsig = knot_load_rrsig(f, id_array, use_ids);
+		if (!use_ids) {
+			knot_rrset_set_owner(tmp_rrsig, rrset->owner);
+		}
+	}
+
+	knot_rrset_set_rrsigs(rrset, tmp_rrsig);
+
+	dbg_zload("Finished loading RRSet %p\n", rrset);
+
+	return rrset;
+}
+
+/*!
+ * \brief Loads node from binary file.
+ *
+ * \param f File to read from.
+ *
+ * \return Pointer to created and read node on success, NULL otherwise.
+ */
+static knot_node_t *knot_load_node(FILE *f, knot_dname_t **id_array)
+{
+	uint8_t flags = 0;
+	knot_node_t *node = NULL;
+	uint32_t parent_id = 0;
+	uint32_t nsec3_node_id = 0;
+	uint16_t rrset_count = 0;
+	uint32_t dname_id = 0;
+
+	/* At the beginning of node - just dname_id !!!.*/
+	if (!fread_wrapper(&dname_id, sizeof(dname_id), 1, f)) {
+		return NULL;
+	}
+
+	if (!fread_wrapper(&parent_id, sizeof(parent_id), 1, f)) {
+		return NULL;
+	}
+
+	if (!fread_wrapper(&flags, sizeof(flags), 1, f)) {
+		return NULL;
+	}
+
+	if (!fread_wrapper(&nsec3_node_id, sizeof(nsec3_node_id), 1, f)) {
+		return NULL;
+	}
+
+	if (!fread_wrapper(&rrset_count, sizeof(rrset_count), 1, f)) {
+		return NULL;
+	}
+	knot_dname_t *owner = id_array[dname_id];
+
+	dbg_zload("Node owner id: %d\n", dname_id);
+	dbg_zload("Node owned by: %s\n", knot_dname_to_str(owner));
+	dbg_zload("Number of RRSets in a node: %d\n", rrset_count);
+
+	node = owner->node;
+
+	if (node == NULL) {
+		fprintf(stderr, "zone: Could not create node.\n");
+		return NULL;
+	}
+	/* XXX can it be 0, ever? I think not. */
+	if (nsec3_node_id != 0) {
+		knot_node_set_nsec3_node(node, id_array[nsec3_node_id]->node);
+		/* CLEANUP */
+//		node->nsec3_node = id_array[nsec3_node_id]->node;
+	} else {
+		knot_node_set_nsec3_node(node, NULL);
+		/* CLEANUP */
+//		node->nsec3_node = NULL;
+	}
+
+	/* Retain new owner while releasing replaced owner. */
+	knot_node_set_owner(node, owner);
+	node->flags = flags;
+
+	//XXX will have to be set already...canonical order should do it
+
+	if (parent_id != 0) {
+		knot_node_set_parent(node, id_array[parent_id]->node);
+		assert(knot_node_parent(node, 0) != NULL);
+	} else {
+		knot_node_set_parent(node, NULL);
+	}
+
+	knot_rrset_t *tmp_rrset;
+
+	for (int i = 0; i < rrset_count; i++) {
+		if ((tmp_rrset = knot_load_rrset(f, id_array, 1)) == NULL) {
+			knot_node_free(&node, 1, 0);
+			//TODO what else to free?
+			fprintf(stderr, "zone: Could not load rrset.\n");
+			return NULL;
+		}
+		/* Retain new owner while releasing replaced owner. */
+		knot_rrset_set_owner(tmp_rrset, node->owner);
+		if (tmp_rrset->rrsigs != NULL) {
+			knot_rrset_set_owner(tmp_rrset->rrsigs, node->owner);
+		}
+		if (knot_node_add_rrset(node, tmp_rrset, 0) < 0) {
+			fprintf(stderr, "zone: Could not add rrset.\n");
+			return NULL;
+		}
+	}
+	assert(node != NULL);
+	dbg_zload("Node loaded: %p\n", node);
+	return node;
+}
+
+/*!
+ * \brief Finds and sets wildcard child for given node's owner.
+ *
+ * \param zone Current zone.
+ * \param node Node to be used.
+ * \param nsec3 Is NSEC3 node.
+ */
+static void find_and_set_wildcard_child(knot_zone_contents_t *zone,
+				 knot_node_t *node, int nsec3)
+{
+	knot_dname_t *chopped = knot_dname_left_chop(node->owner);
+	assert(chopped);
+	knot_node_t *wildcard_parent;
+	if (!nsec3) {
+		wildcard_parent =
+			knot_zone_contents_get_node(zone, chopped);
+	} else {
+		wildcard_parent =
+			knot_zone_contents_get_nsec3_node(zone, chopped);
+	}
+
+	/* Directly discard. */
+	knot_dname_free(&chopped);
+
+	assert(wildcard_parent); /* it *has* to be there */
+
+	knot_node_set_wildcard_child(wildcard_parent, node);
+}
+
+/*!
+ * \brief Checks if magic string at the beginning of the file is the same
+ *        as defined.
+ *
+ * \param f File to read magic string from.
+ * \param MAGIC Magic string.
+ * \param MAGIC_LENGTH Length of magic string.
+ *
+ * \retval 1 if magic is the same.
+ * \retval 0 otherwise.
+ */
+static int knot_check_magic(FILE *f, const uint8_t* MAGIC, uint MAGIC_LENGTH)
+{
+	uint8_t tmp_magic[MAGIC_LENGTH];
+
+	if (!fread_wrapper(&tmp_magic, sizeof(uint8_t), MAGIC_LENGTH, f)) {
+		return 0;
+	}
+
+	for (int i = 0; i < MAGIC_LENGTH; i++) {
+		if (tmp_magic[i] != MAGIC[i]) {
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+static unsigned long calculate_crc(FILE *f)
+{
+	crc_t crc = crc_init();
+	/* Get file size. */
+	fseek(f, 0L, SEEK_END);
+	size_t file_size = ftell(f);
+	fseek(f, 0L, SEEK_SET);
+
+	const size_t chunk_size = 1024;
+	/* read chunks of 1 kB */
+	size_t read_bytes = 0;
+	/* Prealocate chunk */
+	unsigned char *chunk = malloc(sizeof(unsigned char) * chunk_size);
+	CHECK_ALLOC_LOG(chunk, 0);
+	while ((file_size - read_bytes) > chunk_size) {
+		if (!fread_wrapper(chunk, sizeof(unsigned char), chunk_size, f)) {
+			free(chunk);
+			return 0;
+		}
+		crc = crc_update(crc, chunk,
+		                 sizeof(unsigned char) * chunk_size);
+		read_bytes += chunk_size;
+	}
+
+	/* Read the rest of the file */
+	if (!fread_wrapper(chunk, sizeof(unsigned char), file_size - read_bytes,
+	                f)) {
+		free(chunk);
+		return 0;
+	}
+
+	crc = crc_update(crc, chunk,
+	                 sizeof(unsigned char) * (file_size - read_bytes));
+	free(chunk);
+
+	fseek(f, 0L, SEEK_SET);
+	return (unsigned long)crc_finalize(crc);
+}
+
+int knot_zload_open(zloader_t **dst, const char *filename)
+{
+	*dst = 0;
+	if (!dst || !filename) {
+		return KNOT_EBADARG;
+	}
+
+	fread_wrapper = fread_safe_from_file;
+
+	/* Open file for binary read. */
+	FILE *f = fopen(filename, "rb");
+	if (unlikely(!f)) {
+		dbg_zload("knot_zload_open: failed to open '%s'\n",
+				   filename);
+		return KNOT_EFEWDATA; // No such file or directory (POSIX.1)
+	}
+
+	/* Calculate CRC and compare with filename.crc file */
+	unsigned long crc_calculated = calculate_crc(f);
+
+	/* Read CRC from filename.crc file */
+	char *crc_path =
+		malloc(sizeof(char) * (strlen(filename) + strlen(".crc") + 1));
+	if (unlikely(!crc_path)) {
+		fclose(f);
+		return KNOT_ENOMEM;
+	}
+	memset(crc_path, 0,
+	       sizeof(char) * (strlen(filename) + strlen(".crc") + 1));
+
+	memcpy(crc_path, filename, sizeof(char) * strlen(filename));
+
+	crc_path = strcat(crc_path, ".crc");
+	FILE *f_crc = fopen(crc_path, "r");
+	if (unlikely(!f_crc)) {
+		dbg_zload("knot_zload_open: failed to open '%s'\n",
+		                   crc_path);
+		fclose(f);
+		free(crc_path);
+		return KNOT_ECRC;
+	}
+
+	unsigned long crc_from_file = 0;
+	if (fscanf(f_crc, "%lu\n", &crc_from_file) != 1) {
+		dbg_zload("knot_zload_open: could not read "
+		                   "CRC from file '%s'\n",
+		                   crc_path);
+		fclose(f_crc);
+		fclose(f);
+		free(crc_path);
+		return KNOT_ERROR;
+	}
+	free(crc_path);
+	fclose(f_crc);
+
+	/* Compare calculated and read CRCs. */
+	if (crc_from_file != crc_calculated) {
+		dbg_zload("knot_zload_open: CRC failed for "
+		                   "file '%s'\n",
+		                   filename);
+		fclose(f);
+		return KNOT_ECRC;
+	}
+
+	/* Check magic sequence. */
+	static const uint8_t MAGIC[MAGIC_LENGTH] = MAGIC_BYTES;
+	if (!knot_check_magic(f, MAGIC, MAGIC_LENGTH)) {
+		fclose(f);
+		dbg_zload("knot_zload_open: magic bytes "
+				   "in don't match '%*s' "
+			 "(%s)\n",
+			 (int)MAGIC_LENGTH, (const char*)MAGIC, filename);
+		return KNOT_EMALF; // Illegal byte sequence (POSIX.1, C99)
+	}
+
+	/* Read source file length. */
+	uint32_t sflen = 0;
+	if (!fread_wrapper(&sflen, 1, sizeof(uint32_t), f)) {
+		dbg_zload("knot_zload_open: failed to read "
+				   "sfile length\n");
+		fclose(f);
+		return KNOT_ERROR;
+	}
+
+	/* Read source file. */
+	char *sfile = malloc(sflen);
+	if (!sfile) {
+		dbg_zload("knot_zload_open: invalid sfile "
+				   "length %u\n", sflen);
+		fclose(f);
+		return KNOT_ENOMEM;
+	}
+	if (!fread_wrapper(sfile, 1, sflen, f)) {
+		dbg_zload("knot_zload_open: failed to read %uB "
+				   "source file\n",
+			 sflen);
+		free(sfile);
+		fclose(f);
+		return KNOT_ERROR;
+	}
+
+	/* Allocate new loader. */
+	zloader_t *zl = malloc(sizeof(zloader_t));
+	if (!zl) {
+		free(sfile);
+		fclose(f);
+		return KNOT_ENOMEM;
+	}
+
+	dbg_zload("knot_zload_open: opened '%s' as fp %p "
+			   "(source is '%s')\n",
+		 filename, f, sfile);
+	zl->filename = strdup(filename);
+	zl->source = sfile;
+	zl->fp = f;
+	*dst = zl;
+
+	return KNOT_EOK;
+}
+
+static void cleanup_id_array(knot_dname_t **id_array,
+			     const uint from, const uint to)
+{
+	for (uint i = from; i < to; i++) {
+		knot_dname_release(id_array[i]);
+	}
+
+	free(id_array);
+}
+
+//static knot_dname_table_t *create_dname_table(FILE *f, uint max_id)
+//{
+//	if (f == NULL ) {
+//		return NULL;
+//	}
+
+//	if (!fread_wrapper(&max_id, sizeof(max_id), 1, f)) {
+//		return NULL;
+//	}
+
+//	knot_dname_table_t *dname_table = knot_dname_table_new();
+//	if (dname_table == NULL) {
+//		return NULL;
+//	}
+
+//	/* Create nodes containing dnames. */
+//	for (uint i = 1; i < max_id; i++) {
+//		knot_dname_t *loaded_dname = read_dname_with_id(f);
+//		if (loaded_dname == NULL) {
+//			knot_dname_table_deep_free(&dname_table);
+//			return NULL;
+//		}
+//		if (knot_dname_table_add_dname(dname_table,
+//		                                 loaded_dname) != KNOT_EOK) {
+
+//		}
+//	}
+
+//	return dname_table;
+//}
+
+static knot_dname_table_t *create_dname_table_from_array(
+	knot_dname_t **array, uint max_id)
+{
+	if (array == NULL) {
+		/* should I set errno or what ... ? */
+		dbg_zload("No array passed\n");
+		return NULL;
+	}
+
+	assert(array[0] == NULL);
+
+	knot_dname_table_t *ret = knot_dname_table_new();
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	/* Table will have max_id entries */
+	for (uint i = 1; i < max_id; i++) {
+		assert(array[i]);
+		if (knot_dname_table_add_dname(ret,
+						 array[i]) != KNOT_EOK) {
+			dbg_zload("Could not add: %s\n",
+			                   knot_dname_to_str(array[i]));
+			knot_dname_table_deep_free(&ret);
+			return NULL;
+		}
+	}
+
+	return ret;
+}
+
+static knot_dname_t **create_dname_array(FILE *f, uint max_id)
+{
+	if (f == NULL) {
+		return NULL;
+	}
+
+	knot_dname_t **array =
+		malloc(sizeof(knot_dname_t *) * ( max_id + 1));
+	memset(array, 0, sizeof(knot_dname_t *) * (max_id + 1));
+	if (array == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	for (uint i = 0; i < max_id - 1; i++) {
+		knot_dname_t *read_dname = read_dname_with_id(f);
+		if (read_dname == NULL) {
+			cleanup_id_array(array, 0, i);
+			return NULL;
+		}
+
+		if (read_dname->id < max_id) {
+
+			/* Create new node from dname. */
+			read_dname->node = knot_node_new(read_dname, NULL, 0);
+
+			if (read_dname->node == NULL) {
+				ERR_ALLOC_FAILED;
+
+				/* Release read dname. */
+				knot_dname_release(read_dname);
+				cleanup_id_array(array, 0, i);
+				return NULL;
+			}
+
+			/* Store reference to dname in array. */
+			array[read_dname->id] = read_dname;
+		} else {
+			/* Release read dname. */
+			knot_dname_release(read_dname);
+			cleanup_id_array(array, 0, i);
+			return NULL;
+		}
+
+	}
+
+	return array;
+}
+
+knot_zone_t *knot_zload_load(zloader_t *loader)
+{
+	dbg_zload("Loading zone, loader: %p\n", loader);
+	if (!loader) {
+		dbg_zload("NULL loader!\n");
+		return NULL;
+	}
+
+	fread_wrapper = fread_safe_from_file;
+
+	FILE *f = loader->fp;
+
+	knot_node_t *tmp_node;
+
+	/* Load the dname table. */
+	/* CLEANUP */
+//	const knot_dname_table_t *dname_table =
+//		create_dname_table(f, total_dnames);
+//	if (dname_table == NULL) {
+//		return NULL;
+//	}
+
+	uint32_t node_count;
+	uint32_t nsec3_node_count;
+	uint32_t auth_node_count;
+
+	if (!fread_wrapper(&node_count, sizeof(node_count), 1, f)) {
+		dbg_zload("wrong read!\n");
+		return NULL;
+	}
+
+	if (!fread_wrapper(&nsec3_node_count, sizeof(nsec3_node_count), 1, f)) {
+		dbg_zload("wrong read!\n");
+		return NULL;
+	}
+	if (!fread_wrapper(&auth_node_count,
+	      sizeof(auth_node_count), 1, f)) {
+		dbg_zload("wrong read!\n");
+		return NULL;
+	}
+	dbg_zload("authoritative nodes: %u\n", auth_node_count);
+
+	dbg_zload("loading %u nodes\n", node_count);
+
+	uint32_t total_dnames = 0;
+	/* First, read number of dnames in dname table. */
+	if (!fread_wrapper(&total_dnames, sizeof(total_dnames), 1, f)) {
+		return NULL;
+	}
+
+	dbg_zload("total dname count: %d\n", total_dnames);
+
+	/* Create id array. */
+	knot_dname_t **id_array = create_dname_array(f, total_dnames);
+	if (id_array == NULL) {
+		return NULL;
+	}
+
+	knot_dname_table_t *dname_table =
+		create_dname_table_from_array(id_array, total_dnames);
+	if (dname_table == NULL) {
+		ERR_ALLOC_FAILED;
+		cleanup_id_array(id_array, 1, total_dnames);
+		return NULL;
+	}
+
+	knot_node_t *apex = knot_load_node(f, id_array);
+
+	if (!apex) {
+		fprintf(stderr, "zone: Could not load apex node (in %s)\n",
+			loader->filename);
+		cleanup_id_array(id_array, 1,
+				 node_count + nsec3_node_count + 1);
+		return NULL;
+	}
+
+	dbg_zload("Apex node loaded: %p\n", apex);
+
+	knot_zone_t *zone = knot_zone_new(apex, auth_node_count, 0);
+	if (zone == NULL) {
+		cleanup_id_array(id_array, 1,
+				 node_count + nsec3_node_count + 1);
+		dbg_zload("Failed to create new zone from apex!\n");
+		return NULL;
+	}
+
+	knot_zone_contents_t *contents = knot_zone_get_contents(zone);
+	assert(contents);
+
+	/* Assign dname table to the new zone. */
+	contents->dname_table = dname_table;
+
+	/* CLEANUP */
+//	apex->prev = NULL;
+	knot_node_set_previous(apex, NULL);
+
+	knot_node_t *last_node = 0;
+
+	last_node = apex;
+
+	for (uint i = 1; i < node_count; i++) {
+		tmp_node = knot_load_node(f, id_array);
+
+		if (tmp_node != NULL) {
+			if (knot_zone_contents_add_node(contents, tmp_node,
+			                                  0, 0, 0) != 0) {
+				fprintf(stderr, "!! cannot add node\n");
+				continue;
+			}
+			if (knot_dname_is_wildcard(tmp_node->owner)) {
+				find_and_set_wildcard_child(contents,
+				                            tmp_node, 0);
+			}
+
+			knot_node_set_previous(tmp_node, last_node);
+			/* CLEANUP */
+//			tmp_node->prev = last_node;
+
+			if (tmp_node->rrset_count &&
+			    (knot_node_is_deleg_point(tmp_node) ||
+			    !knot_node_is_non_auth(tmp_node))) {
+				last_node = tmp_node;
+			}
+
+		} else {
+			fprintf(stderr, "zone: Node error (in %s).\n",
+				loader->filename);
+		}
+	}
+
+	assert(knot_node_previous(knot_zone_contents_apex(contents), 0)
+	       == NULL);
+
+	knot_node_set_previous(knot_zone_contents_get_apex(contents),
+	                         last_node);
+
+	dbg_zload("loading %u nsec3 nodes\n", nsec3_node_count);
+
+	knot_node_t *nsec3_first = NULL;
+
+	if (nsec3_node_count > 0) {
+		nsec3_first = knot_load_node(f, id_array);
+
+		assert(nsec3_first != NULL);
+
+		if (knot_zone_contents_add_nsec3_node(contents, nsec3_first, 0, 0, 0)
+		    != 0) {
+			fprintf(stderr, "!! cannot add first nsec3 node, "
+				"exiting.\n");
+			knot_zone_deep_free(&zone, 0);
+			free(id_array);
+			/* TODO this will leak dnames from id_array that were
+			 * not assigned. */
+			return NULL;
+		}
+
+		knot_node_set_previous(nsec3_first, NULL);
+		/* CLEANUP */
+//		nsec3_first->prev = NULL;
+
+		last_node = nsec3_first;
+	}
+
+	for (uint i = 1; i < nsec3_node_count; i++) {
+		tmp_node = knot_load_node(f, id_array);
+
+		if (tmp_node != NULL) {
+			if (knot_zone_contents_add_nsec3_node(contents,
+			    tmp_node, 0, 0, 0) != 0) {
+				fprintf(stderr, "!! cannot add nsec3 node\n");
+				continue;
+			}
+
+			knot_node_set_previous(tmp_node, last_node);
+			/* CLEANUP */
+//			tmp_node->prev = last_node;
+
+			last_node = tmp_node;
+		} else {
+			fprintf(stderr, "zone: Node error (in %s).\n",
+				loader->filename);
+		}
+	}
+
+	if (nsec3_node_count) {
+		assert(knot_node_previous(nsec3_first, 0) == NULL);
+		knot_node_set_previous(nsec3_first, last_node);
+		/* CLEANUP */
+//		nsec3_first->prev = last_node;
+	}
+
+	/* ID array is now useless */
+	for (uint i = 1; i < total_dnames; i++) {
+		/* Added to table, may discard now. */
+		knot_dname_release(id_array[i]);
+	}
+	free(id_array);
+
+	dbg_zload("zone loaded, returning: %p\n", zone);
+	return zone;
+}
+
+int knot_zload_needs_update(zloader_t *loader)
+{
+	if (!loader) {
+		return 1;
+	}
+
+	/* Check if the source still exists. */
+	struct stat st_src;
+	if (stat(loader->source, &st_src) != 0) {
+		return 1;
+	}
+
+	/* Check if the compiled file still exists. */
+	struct stat st_bin;
+	if (stat(loader->filename, &st_bin) != 0) {
+		return 1;
+	}
+
+	/* Compare the mtime of the source and file. */
+	/*! \todo Inspect types on Linux. */
+	if (timet_cmp(st_bin.st_mtime, st_src.st_mtime) < 0) {
+		return 1;
+	}
+
+	return 0;
+}
+
+void knot_zload_close(zloader_t *loader)
+{
+	if (!loader) {
+		return;
+	}
+
+	free(loader->filename);
+	free(loader->source);
+	fclose(loader->fp);
+	free(loader);
+}
+
+int knot_zload_rrset_deserialize(knot_rrset_t **rrset,
+                                   uint8_t *stream, size_t *size)
+{
+	if (stream == NULL || size == 0) {
+		return KNOT_EBADARG;
+	}
+
+	fread_wrapper = read_from_stream;
+
+	knot_zload_stream = stream;
+	knot_zload_stream_remaining = knot_zload_stream_size = *size;
+
+	knot_rrset_t *ret = knot_load_rrset(NULL, NULL, 0);
+
+	if (ret == NULL) {
+		knot_zload_stream = NULL;
+		knot_zload_stream_remaining = 0;
+		knot_zload_stream_size = 0;
+		return KNOT_EMALF;
+	}
+
+	*size = knot_zload_stream_remaining;
+	*rrset = ret;
+
+	knot_zload_stream = NULL;
+	knot_zload_stream_remaining = 0;
+	knot_zload_stream_size = 0;
+
+	return KNOT_EOK;
+}
+
diff --git a/src/knot/zone/zone-load.h b/src/knot/zone/zone-load.h
new file mode 100644
index 0000000..2fe318f
--- /dev/null
+++ b/src/knot/zone/zone-load.h
@@ -0,0 +1,104 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file zone-load.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Loader of previously parsed zone
+ *
+ * \addtogroup dnslib
+ * @{
+ */
+
+#ifndef _KNOT_ZONELOAD_H_
+#define _KNOT_ZONELOAD_H_
+
+#include <stdio.h>
+
+#include "libknot/zone/zone.h"
+
+/*!
+ * \brief Zone loader structure.
+ */
+typedef struct zloader_t
+{
+	char *filename;           /*!< Compiled zone filename. */
+	char *source;             /*!< Zone source file. */
+	FILE *fp;                 /*!< Open filepointer to compiled zone. */
+
+} zloader_t;
+
+/*!
+ * \brief Initializes zone loader from file..
+ *
+ * \param filename File containing the compiled zone.
+ * \param loader Will create new loader in *loader.
+ *
+ * \retval Initialized loader on success.
+ * \retval NULL on error.
+ */
+int knot_zload_open(zloader_t **loader, const char *filename);
+
+/*!
+ * \brief Loads zone from a compiled and serialized zone file.
+ *
+ * \param loader Zone loader instance.
+ *
+ * \retval Loaded zone on success.
+ * \retval NULL otherwise.
+ */
+knot_zone_t *knot_zload_load(zloader_t *loader);
+
+/*!
+ * \brief Checks whether the compiled zone needs a recompilation.
+ *
+ * \param loader Zone loader instance.
+ *
+ * \retval 1 is if needs to be recompiled.
+ * \retval 0 if it is up to date.
+ */
+int knot_zload_needs_update(zloader_t *loader);
+
+
+/*!
+ * \brief Free zone loader.
+ *
+ * \param loader Zone loader instance.
+ */
+void knot_zload_close(zloader_t *loader);
+
+/*!
+ * \brief Loads RRSet serialized by knot_zdump_rrset_serialize().
+ *
+ * \param stream Stream containing serialized RRSet.
+ * \param size Size of stream. This variable will contain remaining length of
+ *        stream, once the function has ended.
+ * \param rrset Place for created RRSet.
+ *
+ * \note If RRSet contains RRSIGs, their owners are not copies, but only links
+ *       to the owner of RRSet. All RDATA dnames are copied.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_EBADAG on wrong arguments.
+ * \retval KNOT_EMALF when stream is malformed.
+ */
+int knot_zload_rrset_deserialize(knot_rrset_t **rrset,
+                                   uint8_t *stream, size_t *size);
+
+#endif /* _KNOTD_ZONELOAD_H_ */
+
+/*! @} */
diff --git a/src/knotc.8 b/src/knotc.8
new file mode 100644
index 0000000..f2e7e40
--- /dev/null
+++ b/src/knotc.8
@@ -0,0 +1,63 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.40.4.
+.TH KNOT "1" "November 2011" "Knot DNS, version 0.8" "User Commands"
+.SH NAME
+Knot \- manual page for Knot DNS, version 0.8
+.SH SYNOPSIS
+.B knotc
+[\fIparameters\fR] \fIstart|stop|restart|reload|running|compile\fR
+.SH DESCRIPTION
+.SS "Parameters:"
+.HP
+\fB\-c\fR [file], \fB\-\-config\fR=\fI[file]\fR Select configuration file.
+.TP
+\fB\-j\fR [num], \fB\-\-jobs\fR=\fI[num]\fR
+Number of parallel tasks to run (only for 'compile').
+.TP
+\fB\-f\fR, \fB\-\-force\fR
+Force operation \- override some checks.
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+Verbose mode \- additional runtime information.
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+Print knot server version.
+.TP
+\fB\-w\fR, \fB\-\-wait\fR
+Wait for the server to finish start/stop operations.
+.TP
+\fB\-i\fR, \fB\-\-interactive\fR
+Interactive mode (do not daemonize).
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help and usage.
+.SS "Actions:"
+.TP
+start
+Start knot server zone (no\-op if running).
+.TP
+stop
+Stop knot server (no\-op if not running).
+.TP
+restart
+Stops and then starts knot server.
+.TP
+reload
+Reload knot configuration and compiled zones.
+.TP
+running
+check if server is running.
+.TP
+compile
+Compile zone file.
+.SH "SEE ALSO"
+The full documentation for
+.B Knot
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B Knot
+programs are properly installed at your site, the command
+.IP
+.B info Knot
+.PP
+should give you access to the complete manual.
diff --git a/src/knotd.8 b/src/knotd.8
new file mode 100644
index 0000000..3275e9b
--- /dev/null
+++ b/src/knotd.8
@@ -0,0 +1,35 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.40.4.
+.TH KNOT "1" "November 2011" "Knot DNS, version 0.8" "User Commands"
+.SH NAME
+Knot \- manual page for Knot DNS, version 0.8
+.SH SYNOPSIS
+.B knotd
+[\fIparameters\fR]
+.SH DESCRIPTION
+.SS "Parameters:"
+.HP
+\fB\-c\fR, \fB\-\-config\fR [file] Select configuration file.
+.TP
+\fB\-d\fR, \fB\-\-daemonize\fR
+Run server as a daemon.
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+Verbose mode \- additional runtime information.
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+Print version of the server.
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help and usage.
+.SH "SEE ALSO"
+The full documentation for
+.B Knot
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B Knot
+programs are properly installed at your site, the command
+.IP
+.B info Knot
+.PP
+should give you access to the complete manual.
diff --git a/src/libknot/common.h b/src/libknot/common.h
new file mode 100644
index 0000000..9b2d8ae
--- /dev/null
+++ b/src/libknot/common.h
@@ -0,0 +1,105 @@
+/*!
+ * \file common.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Common macros, includes and utilities.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_LIBLDNS
+#define TEST_WITH_LDNS
+#endif
+
+#ifndef _KNOT_COMMON_H_
+#define _KNOT_COMMON_H_
+
+#define KNOT_NAME "lib" PACKAGE_NAME // Project name
+#define KNOT_VER  PACKAGE_VERSION  // 0xMMIIRR (MAJOR,MINOR,REVISION)
+
+#ifndef UINT_DEFINED
+typedef unsigned int uint; /*!< \brief Unsigned. */
+#define UINT_DEFINED
+#endif
+
+/*! \brief If defined, zone structures will use hash table for lookup. */
+#define USE_HASH_TABLE
+
+/*! \brief Eliminate compiler warning with unused parameters. */
+#define UNUSED(param) (void)(param)
+
+/*! \brief Type-safe minimum macro. */
+#define MIN(a, b) \
+	({ typeof (a) _a = (a); typeof (b) _b = (b); _a < _b ? _a : _b; })
+
+/*! \brief Type-safe maximum macro. */
+#define MAX(a, b) \
+	({ typeof (a) _a = (a); typeof (b) _b = (b); _a > _b ? _a : _b; })
+
+/* Optimisation macros. */
+#ifndef likely
+/*! \brief Optimize for x to be true value. */
+#define likely(x)       __builtin_expect((x),1)
+#endif
+#ifndef unlikely
+/*! \brief Optimize for x to be false value. */
+#define unlikely(x)     __builtin_expect((x),0)
+#endif
+
+/* Optimisation macros. */
+#ifndef likely
+/*! \brief Optimize for x to be true value. */
+#define likely(x)       __builtin_expect((x),1)
+#endif
+#ifndef unlikely
+/*! \brief Optimize for x to be false value. */
+#define unlikely(x)     __builtin_expect((x),0)
+#endif
+
+/*! \todo Refactor theese. We should have an allocator function handling this.*/
+#ifndef ERR_ALLOC_FAILED
+#define ERR_ALLOC_FAILED fprintf(stderr, "Allocation failed at %s:%d (%s ver.%s)\n", \
+				 __FILE__, __LINE__, KNOT_NAME, KNOT_VER)
+#endif
+
+#ifndef CHECK_ALLOC_LOG
+#define CHECK_ALLOC_LOG(var, ret) \
+	do { \
+		if ((var) == NULL) { \
+			ERR_ALLOC_FAILED; \
+			return (ret); \
+		} \
+	} while (0)
+#endif
+
+#ifndef CHECK_ALLOC
+#define CHECK_ALLOC(var, ret) \
+	do { \
+		if ((var) == NULL) { \
+			return (ret); \
+		} \
+	} while (0)
+#endif
+
+#endif /* _KNOT_COMMON_H_ */
+
+/*! @} */
diff --git a/src/libknot/consts.h b/src/libknot/consts.h
new file mode 100644
index 0000000..4249763
--- /dev/null
+++ b/src/libknot/consts.h
@@ -0,0 +1,108 @@
+/*!
+ * \file consts.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Contains some DNS-related constants.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_CONSTS_H_
+#define _KNOT_CONSTS_H_
+
+#include <stdint.h>
+#include "util/descriptor.h"
+
+/*
+ * OPCODEs
+ */
+typedef enum knot_opcode {
+	KNOT_OPCODE_QUERY  = 0, /* a standard query (QUERY) */
+	KNOT_OPCODE_IQUERY = 1, /* an inverse query (IQUERY) */
+	KNOT_OPCODE_STATUS = 2, /* a server status request (STATUS) */
+	KNOT_OPCODE_NOTIFY = 4, /* NOTIFY */
+	KNOT_OPCODE_UPDATE = 5, /* Dynamic update */
+	KNOT_OPCODE_OFFSET = 14
+} knot_opcode_t;
+
+/*!
+ * \brief Query types (internal use only).
+ *
+ * This type encompasses the different query types distinguished by both the
+ * OPCODE and the QTYPE.
+ */
+typedef enum knot_packet_type {
+	KNOT_QUERY_NORMAL,    /*!< Normal query. */
+	KNOT_QUERY_AXFR,      /*!< Request for AXFR transfer. */
+	KNOT_QUERY_IXFR,      /*!< Request for IXFR transfer. */
+	KNOT_QUERY_NOTIFY,    /*!< NOTIFY query. */
+	KNOT_QUERY_UPDATE,    /*!< Dynamic update. */
+	KNOT_RESPONSE_NORMAL, /*!< Normal response. */
+	KNOT_RESPONSE_AXFR,   /*!< AXFR transfer response. */
+	KNOT_RESPONSE_IXFR,   /*!< IXFR transfer response. */
+	KNOT_RESPONSE_NOTIFY  /*!< NOTIFY response. */
+} knot_packet_type_t;
+
+/*
+ * RCODEs
+ */
+typedef enum knot_rcode {
+	KNOT_RCODE_NOERROR  = 0,  /* No error condition */
+	KNOT_RCODE_FORMERR  = 1,  /* Format error */
+	KNOT_RCODE_SERVFAIL = 2,  /* Server failure */
+	KNOT_RCODE_NXDOMAIN = 3,  /* Name Error */
+	KNOT_RCODE_NOTIMPL  = 4,  /* Not implemented */
+	KNOT_RCODE_REFUSED  = 5,  /* Refused */
+	KNOT_RCODE_YXDOMAIN = 6,  /* name should not exist */
+	KNOT_RCODE_YXRRSET  = 7,  /* rrset should not exist */
+	KNOT_RCODE_NXRRSET  = 8,  /* rrset does not exist */
+	KNOT_RCODE_NOTAUTH  = 9,  /* server not authoritative */
+	KNOT_RCODE_NOTZONE  = 10,  /* name not inside zone */
+} knot_rcode_t;
+
+typedef enum knot_tsig_rcode {
+	KNOT_TSIG_RCODE_BADSIG  = 16,
+	KNOT_TSIG_RCODE_BADKEY  = 17,
+	KNOT_TSIG_RCODE_BADTIME = 18
+} knot_tsig_rcode_t;
+
+/*
+ * CLASSes
+ */
+//typedef enum knot_class {
+//	KNOT_CLASS_IN = 1,	/* Class IN */
+//	KNOT_CLASS_CS = 2,	/* Class CS */
+//	KNOT_CLASS_CH = 3,	/* Class CHAOS */
+//	KNOT_CLASS_HS = 4,	/* Class HS */
+//	KNOT_CLASS_NONE = 254,	/* Class NONE rfc2136 */
+//	KNOT_CLASS_ANY = 255	/* Class ANY */
+//} knot_class_t;
+
+/*
+ * Other
+ */
+typedef enum knot_const {
+	KNOT_MAX_DNAME_LENGTH = 255,
+	KNOT_MAX_DNAME_LABELS = 127  // 1-char labels
+} knot_const_t;
+
+#endif /* _KNOT_CONSTS_H_ */
+
+/*! @} */
diff --git a/src/libknot/dname.c b/src/libknot/dname.c
new file mode 100644
index 0000000..869b342
--- /dev/null
+++ b/src/libknot/dname.c
@@ -0,0 +1,1070 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>	// tolower()
+
+#include "common.h"
+#include "util/error.h"
+#include "dname.h"
+#include "consts.h"
+#include "util/tolower.h"
+#include "util/debug.h"
+#include "util/utils.h"
+#include "util/wire.h"
+
+/*! \todo dnames allocated from TLS cache will be discarded after thread
+ *        termination. This shouldn't happpen.
+ */
+#if 0
+/*
+ * Memory cache.
+ */
+#include "common/slab/slab.h"
+#include <stdio.h>
+#include <pthread.h>
+
+/*! \brief TLS unique key for each thread cache. */
+static pthread_key_t dname_ckey;
+static pthread_once_t dname_once = PTHREAD_ONCE_INIT;
+
+/*! \brief Destroy thread dname cache (automatically called). */
+static void knot_dname_cache_free(void *ptr)
+{
+	slab_cache_t* cache = (slab_cache_t*)ptr;
+	if (cache) {
+		slab_cache_destroy(cache);
+		free(cache);
+	}
+}
+
+/*! \brief Cleanup for main() TLS. */
+static void knot_dname_cache_main_free()
+{
+	knot_dname_cache_free(pthread_getspecific(dname_ckey));
+}
+
+static void knot_dname_cache_init()
+{
+	(void) pthread_key_create(&dname_ckey, knot_dname_cache_free);
+	atexit(knot_dname_cache_main_free); // Main thread cleanup
+}
+#endif
+
+/*!
+ * \brief Allocate item from thread cache.
+ * \retval Allocated dname instance on success.
+ * \retval NULL on error.
+ */
+static knot_dname_t* knot_dname_alloc()
+{
+	return malloc(sizeof(knot_dname_t));
+
+	/*! \todo dnames allocated from TLS cache will be discarded after thread
+	 *        termination. This shouldn't happpen.
+	 */
+#if 0
+	/* Initialize dname cache TLS key. */
+	(void)pthread_once(&dname_once, knot_dname_cache_init);
+
+	/* Create cache if not exists. */
+	slab_cache_t* cache = pthread_getspecific(dname_ckey);
+	if (unlikely(!cache)) {
+		cache = malloc(sizeof(slab_cache_t));
+		if (!cache) {
+			return 0;
+		}
+
+		/* Initialize cache. */
+		slab_cache_init(cache, sizeof(knot_dname_t));
+		(void)pthread_setspecific(dname_ckey, cache);
+	}
+
+	return slab_cache_alloc(cache);
+#endif
+}
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+static int knot_dname_set(knot_dname_t *dname, uint8_t *wire,
+                            short wire_size, const uint8_t *labels,
+                            short label_count)
+{
+	dname->name = wire;
+	dname->size = wire_size;
+	dname->label_count = label_count;
+
+	assert(label_count >= 0);
+
+	dname->labels = (uint8_t *)malloc(dname->label_count * sizeof(uint8_t));
+	CHECK_ALLOC_LOG(dname->labels, -1);
+	memcpy(dname->labels, labels, dname->label_count);
+
+	return 0;
+}
+
+/*!
+ * \brief Converts domain name from string representation to wire format.
+ *
+ * This function also allocates the space for the wire format.
+ *
+ * \param name Domain name in string representation (presentation format).
+ * \param size Size of the given domain name in characters (not counting the
+ *             terminating 0 character.
+ * \param dname Domain name where to store the wire format.
+ *
+ * \return Size of the wire format of the domain name in octets. If 0, no
+ *         space has been allocated.
+ *
+ * \todo handle \X and \DDD (RFC 1035 5.1) or it can be handled by the parser?
+ */
+static int knot_dname_str_to_wire(const char *name, uint size,
+                                    knot_dname_t *dname)
+{
+	if (size > KNOT_MAX_DNAME_LENGTH) {
+		return -1;
+	}
+
+	uint wire_size;
+	int root = (*name == '.' && size == 1);
+	// root => different size
+	if (root) {
+		wire_size = 1;
+	} else {
+		wire_size = size + 1;
+	}
+
+	uint8_t *wire;
+	uint8_t labels[KNOT_MAX_DNAME_LABELS];
+	short label_count = 0;
+
+	// signed / unsigned issues??
+	wire = (uint8_t *)malloc(wire_size * sizeof(uint8_t));
+	if (wire == NULL) {
+		return -1;
+	}
+
+	dbg_dname("Allocated space for wire format of dname: %p\n",
+	                   wire);
+
+	if (root) {
+		*wire = '\0';
+		label_count = 0;
+		return knot_dname_set(dname, wire, wire_size, labels,
+		                        label_count);
+	}
+
+	const uint8_t *ch = (const uint8_t *)name;
+	uint8_t *label_start = wire;
+	uint8_t *w = wire + 1;
+	uint8_t label_length = 0;
+
+	while (ch - (const uint8_t *)name < size) {
+		assert(w - wire - 1 == ch - (const uint8_t *)name);
+
+		if (*ch == '.') {
+			dbg_dname("Position %zd (%p): "
+			                   "label length: %u\n",
+			                   label_start - wire,
+			                   label_start, label_length);
+			*label_start = label_length;
+			labels[label_count++] = label_start - wire;
+			label_start = w;
+			label_length = 0;
+		} else {
+			assert(w - wire < wire_size);
+			dbg_dname("Position %zd (%p): character: %c\n",
+			                   w - wire, w, *ch);
+			*w = *ch;
+			++label_length;
+		}
+
+		++w;
+		++ch;
+		assert(ch >= (const uint8_t *)name);
+	}
+
+	--ch;
+	if (*ch == '.') { // put 0 for root label if the name ended with .
+		--w;
+		dbg_dname("Position %zd (%p): character: (null)\n",
+				   w - wire, w);
+		*w = 0;
+	} else { // otherwise we did not save the last label length
+		dbg_dname("Position %zd (%p): "
+		                   "label length: %u\n",
+		                   label_start - wire,
+		                   label_start, label_length);
+		*label_start = label_length;
+		labels[label_count++] = label_start - wire;
+	}
+
+	return knot_dname_set(dname, wire, wire_size, labels, label_count);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static inline int knot_dname_tolower(uint8_t c, int cs)
+{
+	return (cs) ? c : knot_tolower(c);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_dname_compare_labels(const uint8_t *label1,
+                                       const uint8_t *label2, int cs)
+{
+	const uint8_t *pos1 = label1;
+	const uint8_t *pos2 = label2;
+
+	int label_length = (*pos1 < *pos2) ? *pos1 : *pos2;
+	int i = 0;
+
+	while (i < label_length
+	       && knot_dname_tolower(*(++pos1), cs)
+	          == knot_dname_tolower(*(++pos2), cs)) {
+		++i;
+	}
+
+	if (i < label_length) {  // difference in some octet
+		return (knot_dname_tolower(*pos1, cs)
+		        - knot_dname_tolower(*pos2, cs));
+	}
+
+	return (label1[0] - label2[0]);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_dname_find_labels(knot_dname_t *dname, int alloc)
+{
+	const uint8_t *name = dname->name;
+	const uint8_t *pos = name;
+	const uint size = dname->size;
+
+	uint8_t labels[KNOT_MAX_DNAME_LABELS];
+	short label_count = 0;
+
+	while (pos - name < size && *pos != '\0') {
+		labels[label_count++] = pos - name;
+		pos += *pos + 1;
+	}
+
+	// TODO: how to check if the domain name has right format?
+	if (pos - name > size || *pos != '\0') {
+		dbg_dname("Wrong wire format of domain name!\n");
+		dbg_dname("Position: %d, character: %d, expected"
+				   " size: %d\n", pos - name, *pos, size);
+		return -1;
+	}
+
+	if (alloc) {
+		dname->labels
+			= (uint8_t *)malloc(label_count * sizeof(uint8_t));
+		CHECK_ALLOC_LOG(dname->labels, KNOT_ENOMEM);
+	}
+
+	memcpy(dname->labels, labels, label_count);
+	dname->label_count = label_count;
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_dname_cmp(const knot_dname_t *d1, const knot_dname_t *d2,
+                            int cs)
+{
+dbg_dname_exec(
+	char *name1 = knot_dname_to_str(d1);
+	char *name2 = knot_dname_to_str(d2);
+
+	dbg_dname("Comparing dnames %s and %s\n",
+	                   name1, name2);
+
+	for (int i = 0; i < strlen(name1); ++i) {
+		name1[i] = knot_tolower(name1[i]);
+	}
+	for (int i = 0; i < strlen(name2); ++i) {
+		name2[i] = knot_tolower(name2[i]);
+	}
+
+	dbg_dname("After to lower: %s and %s\n",
+	                   name1, name2);
+
+	free(name1);
+	free(name2);
+);
+
+	if (!cs && d1 == d2) {
+		return 0;
+	}
+
+	int l1 = d1->label_count;
+	int l2 = d2->label_count;
+	dbg_dname("Label counts: %d and %d\n", l1, l2);
+	assert(l1 >= 0);
+	assert(l2 >= 0);
+
+	// compare labels from last to first
+	while (l1 > 0 && l2 > 0) {
+		dbg_dname("Comparing labels %d and %d\n",
+				   l1 - 1, l2 - 1);
+		dbg_dname(" at offsets: %d and %d\n",
+				   d1->labels[l1 - 1], d2->labels[l2 - 1]);
+		int res = knot_dname_compare_labels(
+		                   &d1->name[d1->labels[--l1]],
+		                   &d2->name[d2->labels[--l2]],
+		                   cs);
+		if (res != 0) {
+			return res;
+		} // otherwise the labels are identical, continue with previous
+	}
+
+	// if all labels matched, the shorter name is first
+	if (l1 == 0 && l2 > 0) {
+		return -1;
+	}
+
+	if (l1 > 0 && l2 == 0) {
+		return 1;
+	}
+
+	return 0;
+}
+
+/*! \brief Destructor for reference counter. */
+static void knot_dname_dtor(struct ref_t *p)
+{
+	knot_dname_t *dname = (knot_dname_t *)p;
+	knot_dname_free(&dname);
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_new()
+{
+	knot_dname_t *dname = knot_dname_alloc();
+	dname->name = NULL;
+	dname->size = 0;
+	dname->node = NULL;
+	dname->labels = NULL;
+	dname->label_count = -1;
+	dname->id = 0;
+
+	/* Initialize reference counting. */
+	ref_init(&dname->ref, knot_dname_dtor);
+
+	/* Set reference counter to 1, caller should release it after use. */
+	knot_dname_retain(dname);
+
+	return dname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_new_from_str(const char *name, uint size,
+                                          struct knot_node *node)
+{
+	if (name == NULL || size == 0) {
+		return NULL;
+	}
+
+//	knot_dname_t *dname = knot_dname_alloc();
+	knot_dname_t *dname = knot_dname_new();
+
+	if (dname == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	knot_dname_str_to_wire(name, size, dname);
+	dbg_dname("Created dname with size: %d\n", dname->size);
+	dbg_dname("Label offsets: ");
+	for (int i = 0; i < dname->label_count; ++i) {
+		dbg_dname("%d, ", dname->labels[i]);
+	}
+	dbg_dname("\n");
+
+	if (dname->size <= 0) {
+		fprintf(stderr, "Could not parse domain name "
+		        "from string: '%.*s'\n", size, name);
+	}
+	assert(dname->name != NULL);
+
+	dname->node = node;
+	dname->id = 0;
+
+	return dname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+//int knot_dname_from_wire(knot_dname_t *dname, const uint8_t *name,
+//                           uint size)
+//{
+//	int i = 0;
+//	uint8_t labels[KNOT_MAX_DNAME_LABELS];
+//	int label_i = 0;
+
+//	while (name[i] != 0) {
+//		labels[label_i++] = i;
+//		uint8_t label_length = name[i];
+//		if (i + label_length >= size) {
+//			return -2;
+//		}
+//		for (int j = 1; j <= label_length; ++j) {
+//		}
+//	}
+//}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_new_from_wire(const uint8_t *name, uint size,
+                                           struct knot_node *node)
+{
+	if (name == NULL) { /* && size != 0) { !OS: Nerozumjaju */
+		dbg_dname("No name given!\n");
+		return NULL;
+	}
+
+	knot_dname_t *dname = knot_dname_new();
+
+	if (dname == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	dname->name = (uint8_t *)malloc(size * sizeof(uint8_t));
+	if (dname->name == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_free(&dname);
+		return NULL;
+	}
+
+	memcpy(dname->name, name, size);
+	dname->size = size;
+
+	if (knot_dname_find_labels(dname, 1) != 0) {
+		knot_dname_free(&dname);
+		return NULL;
+	}
+
+	dname->node = node;
+	dname->id = 0;
+
+	return dname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_parse_from_wire(const uint8_t *wire,
+                                             size_t *pos, size_t size,
+                                             knot_node_t *node)
+{
+	uint8_t name[KNOT_MAX_DNAME_LENGTH];
+	uint8_t labels[KNOT_MAX_DNAME_LABELS];
+
+	short l = 0;
+	size_t i = 0, p = *pos;
+	int pointer_used = 0;
+
+	while (p < size && wire[p] != 0) {
+		labels[l] = i;
+		dbg_dname("Next label (%d.) position: %zu\n", l, i);
+
+		if (knot_wire_is_pointer(wire + p)) {
+			// pointer.
+//			printf("Pointer.\n");
+			p = knot_wire_get_pointer(wire + p);
+			if (!pointer_used) {
+				*pos += 2;
+				pointer_used = 1;
+			}
+			if (p >= size) {
+				return NULL;
+			}
+		} else {
+			// label; first byte is label length
+			uint8_t length = *(wire + p);
+//			printf("Label, length: %u.\n", length);
+			memcpy(name + i, wire + p, length + 1);
+			p += length + 1;
+			i += length + 1;
+			if (!pointer_used) {
+				*pos += length + 1;
+			}
+			++l;
+		}
+	}
+	if (p >= size) {
+		return NULL;
+	}
+
+	name[i] = 0;
+	if (!pointer_used) {
+		*pos += 1;
+	}
+
+	knot_dname_t *dname = knot_dname_new();
+
+	if (dname == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	dname->name = (uint8_t *)malloc((i + 1) * sizeof(uint8_t));
+	if (dname->name == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_free(&dname);
+		return NULL;
+	}
+
+	memcpy(dname->name, name, i + 1);
+	dname->size = i + 1;
+
+	dname->labels = (uint8_t *)malloc((l + 1) * sizeof(uint8_t));
+	if (dname->labels == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_free(&dname);
+		return NULL;
+	}
+	memcpy(dname->labels, labels, l + 1);
+
+	dname->label_count = l;
+
+	dname->node = node;
+
+	return dname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_from_wire(const uint8_t *name, uint size,
+                           struct knot_node *node, knot_dname_t *target)
+{
+	if (name == NULL || target == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	memcpy(target->name, name, size);
+	target->size = size;
+	target->node = node;
+	target->id = 0;
+
+	return knot_dname_find_labels(target, 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_deep_copy(const knot_dname_t *dname)
+{
+	return knot_dname_new_from_wire(dname->name, dname->size,
+	                                  dname->node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+char *knot_dname_to_str(const knot_dname_t *dname)
+{
+	if (!dname || dname->size == 0) {
+		return 0;
+	}
+
+	char *name;
+
+	// root => special treatment
+	if (dname->size == 1) {
+		assert(dname->name[0] == 0);
+		name = (char *)malloc(2 * sizeof(char));
+		name[0] = '.';
+		name[1] = '\0';
+		return name;
+	}
+
+	name = (char *)malloc(dname->size * sizeof(char));
+	if (name == NULL) {
+		return NULL;
+	}
+
+	uint8_t *w = dname->name;
+	char *ch = name;
+	int i = 0;
+
+	do {
+		assert(*w != 0);
+		int label_size = *(w++);
+		// copy the label
+		memcpy(ch, w, label_size);
+		i += label_size;
+		ch += label_size;
+		w += label_size;
+		if (w - dname->name < dname->size) { // another label following
+			*(ch++) = '.';
+			++i;
+		}
+	} while (i < dname->size - 1);
+
+	*ch = 0;
+	assert(ch - name == dname->size - 1);
+
+	return name;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_to_lower(knot_dname_t *dname)
+{
+	if (dname == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	for (int i = 0; i < dname->size; ++i) {
+		dname->name[i] = knot_tolower(dname->name[i]);
+	}
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_to_lower_copy(const knot_dname_t *dname, char *name, 
+                             size_t size)
+{
+	if (dname == NULL || name == NULL || size < dname->size) {
+		return KNOT_EBADARG;
+	}
+	
+	for (int i = 0; i < dname->size; ++i) {
+		name[i] = knot_tolower(dname->name[i]);
+	}
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const uint8_t *knot_dname_name(const knot_dname_t *dname)
+{
+	return dname->name;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint knot_dname_size(const knot_dname_t *dname)
+{
+	return dname->size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+unsigned int knot_dname_id(const knot_dname_t *dname)
+{
+	return dname->id;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint8_t knot_dname_size_part(const knot_dname_t *dname, int labels)
+{
+	assert(labels < dname->label_count);
+	assert(dname->labels != NULL);
+	return (dname->labels[labels]);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const struct knot_node *knot_dname_node(const knot_dname_t *dname,
+                                            int check_version)
+
+{
+	if (check_version) {
+		return knot_node_current(dname->node);
+	} else {
+		return dname->node;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+struct knot_node *knot_dname_get_node(knot_dname_t *dname,
+                                          int check_version)
+{
+	if (check_version) {
+		return knot_node_get_current(dname->node);
+	} else {
+		return dname->node;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_dname_set_node(knot_dname_t *dname, knot_node_t *node)
+{
+	dname->node = node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_dname_update_node(knot_dname_t *dname)
+{
+	knot_node_update_ref(&dname->node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_is_fqdn(const knot_dname_t *dname)
+{
+	return (dname->name[dname->size - 1] == '\0');
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_left_chop(const knot_dname_t *dname)
+{
+	knot_dname_t *parent = knot_dname_new();
+	if (parent == NULL) {
+		return NULL;
+	}
+
+	parent->size = dname->size - dname->name[0] - 1;
+	parent->name = (uint8_t *)malloc(parent->size);
+	if (parent->name == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_free(&parent);
+		return NULL;
+	}
+
+	parent->labels = (uint8_t *)malloc(dname->label_count - 1);
+	if (parent->labels == NULL) {
+		ERR_ALLOC_FAILED;
+		free(parent->name);
+		knot_dname_free(&parent);
+		return NULL;
+	}
+
+	memcpy(parent->name, &dname->name[dname->name[0] + 1], parent->size);
+
+	short first_label_length = dname->labels[1];
+
+	for (int i = 0; i < dname->label_count - 1; ++i) {
+		parent->labels[i] = dname->labels[i + 1] - first_label_length;
+	}
+	parent->label_count = dname->label_count - 1;
+
+	return parent;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_dname_left_chop_no_copy(knot_dname_t *dname)
+{
+	// copy the name
+	short first_label_length = dname->labels[1];
+
+	if (dname->label_count > 1) {
+		memmove(dname->name, &dname->name[dname->labels[1]],
+			dname->size - first_label_length);
+		// adjust labels
+		for (int i = 0; i < dname->label_count - 1; ++i) {
+			dname->labels[i] = dname->labels[i + 1]
+			                   - first_label_length;
+		}
+		dname->label_count = dname->label_count - 1;
+		dname->size -= first_label_length;
+	} else {
+		dname->name[0] = '\0';
+		dname->size = 1;
+		dname->label_count = 0;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_is_subdomain(const knot_dname_t *sub,
+                              const knot_dname_t *domain)
+{
+dbg_dname_exec(
+	char *name1 = knot_dname_to_str(sub);
+	char *name2 = knot_dname_to_str(domain);
+
+	dbg_dname("Checking if %s is subdomain of %s\n",
+	                   name1, name2);
+	free(name1);
+	free(name2);
+);
+
+	if (sub == domain) {
+		return 0;
+	}
+
+	// if one of the names is fqdn and the other is not
+	if ((sub->name[sub->size - 1] == '\0'
+	      && domain->name[domain->size - 1] != '\0')
+	    || (sub->name[sub->size - 1] != '\0'
+		&& domain->name[domain->size - 1] == '\0')) {
+		return 0;
+	}
+
+	int l1 = sub->label_count;
+	int l2 = domain->label_count;
+
+	dbg_dname("Label counts: %d and %d\n", l1, l2);
+
+	if (l1 <= l2) {  // if sub does not have more labes than domain
+		return 0;  // it is not its subdomain
+	}
+
+	// compare labels from last to first
+	while (l1 > 0 && l2 > 0) {
+		dbg_dname("Comparing labels %d and %d\n",
+				   l1 - 1, l2 - 1);
+		dbg_dname(" at offsets: %d and %d\n",
+				   sub->labels[l1 - 1], domain->labels[l2 - 1]);
+		// if some labels do not match
+		if (knot_dname_compare_labels(&sub->name[sub->labels[--l1]],
+		                    &domain->name[domain->labels[--l2]], 0)
+		    != 0) {
+			return 0;  // sub is not a subdomain of domain
+		} // otherwise the labels are identical, continue with previous
+	}
+
+	// if all labels matched, it should be subdomain (more labels)
+	assert(l1 > l2);
+
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_is_wildcard(const knot_dname_t *dname)
+{
+	return (dname->size >= 2
+		&& dname->name[0] == 1
+		&& dname->name[1] == '*');
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_matched_labels(const knot_dname_t *dname1,
+                                const knot_dname_t *dname2)
+{
+	int l1 = dname1->label_count;
+	int l2 = dname2->label_count;
+
+	// compare labels from last to first
+	int matched = 0;
+	while (l1 > 0 && l2 > 0) {
+		int res = knot_dname_compare_labels(
+		               &dname1->name[dname1->labels[--l1]],
+		               &dname2->name[dname2->labels[--l2]], 0);
+		if (res == 0) {
+			++matched;
+		} else  {
+			break;
+		}
+	}
+
+	return matched;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_label_count(const knot_dname_t *dname)
+{
+	return dname->label_count;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint8_t knot_dname_label_size(const knot_dname_t *dname, int i)
+{
+//	printf("Returning size of %d. label starting on %d\n",
+//	       i, dname->labels[i]);
+//	printf("Label count: %d, size of %d. label: %d, size of %d.label: %d\n",
+//	       dname->label_count, i, dname->labels[i], i + 1,
+//	       dname->labels[i+1]);
+//	printf("Size from the name: %u\n", dname->name[dname->labels[i]]);
+//	printf("Size from label offsets: %u\n",
+//	       dname->labels[i + 1] - dname->labels[i]);
+
+	assert(i >= 0);
+	assert(dname->size == 1 || i + 1 == dname->label_count
+	       || dname->labels[i + 1] - dname->labels[i] - 1
+	          == dname->name[dname->labels[i]]);
+	return dname->name[dname->labels[i]];
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_replace_suffix(const knot_dname_t *dname,
+                                            int size,
+                                            const knot_dname_t *suffix)
+{
+dbg_dname_exec(
+	char *name = knot_dname_to_str(dname);
+	dbg_dname("Replacing suffix of name %s, size %d with ", name,
+	                   size);
+	free(name);
+	name = knot_dname_to_str(suffix);
+	dbg_dname("%s (size %d)\n", name, suffix->size);
+	free(name);
+);
+	knot_dname_t *res = knot_dname_new();
+	CHECK_ALLOC(res, NULL);
+
+	res->size = dname->size - size + suffix->size;
+
+	dbg_dname("Allocating %d bytes...\n", res->size);
+	res->name = (uint8_t *)malloc(res->size);
+	if (res->name == NULL) {
+		knot_dname_free(&res);
+		return NULL;
+	}
+
+	dbg_dname_hex((char *)res->name, res->size);
+
+	dbg_dname("Copying %d bytes from the original name.\n",
+	                   dname->size - size);
+	memcpy(res->name, dname->name, dname->size - size);
+	dbg_dname_hex((char *)res->name, res->size);
+
+	dbg_dname("Copying %d bytes from the suffix.\n", suffix->size);
+	memcpy(res->name + dname->size - size, suffix->name, suffix->size);
+
+	dbg_dname_hex((char *)res->name, res->size);
+
+	knot_dname_find_labels(res, 1);
+
+	return res;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_dname_free(knot_dname_t **dname)
+{
+	if (dname == NULL || *dname == NULL) {
+		return;
+	}
+
+//		char *name = knot_dname_to_str((*dname));
+
+//	printf("freeing in dname: %s %p\n", name, *dname);
+
+//	free(name);
+
+
+	if ((*dname)->name != NULL) {
+		free((*dname)->name);
+	}
+
+	if((*dname)->labels != NULL) {
+		free((*dname)->labels);
+	}
+
+
+//	slab_free(*dname);
+	free(*dname);
+	*dname = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_compare(const knot_dname_t *d1, const knot_dname_t *d2)
+{
+	return knot_dname_cmp(d1, d2, 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_dname_compare_cs(const knot_dname_t *d1, const knot_dname_t *d2)
+{
+	return knot_dname_cmp(d1, d2, 1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_dname_cat(knot_dname_t *d1, const knot_dname_t *d2)
+{
+	if (d2->size == 0) {
+		return d1;
+	}
+
+	if (knot_dname_is_fqdn(d1)) {
+		return NULL;
+	}
+
+	// allocate new space
+	uint8_t *new_dname = (uint8_t *)malloc(d1->size + d2->size);
+	CHECK_ALLOC_LOG(new_dname, NULL);
+
+	uint8_t *new_labels = (uint8_t *)malloc(d1->label_count
+	                                        + d2->label_count);
+	if (new_labels == NULL) {
+		ERR_ALLOC_FAILED;
+		free(new_dname);
+		return NULL;
+	}
+
+	dbg_dname("1: copying %d bytes from adress %p to %p\n",
+	                   d1->size, d1->name, new_dname);
+
+	memcpy(new_dname, d1->name, d1->size);
+
+	dbg_dname("2: copying %d bytes from adress %p to %p\n",
+	                   d2->size, d2->name, new_dname + d1->size);
+
+	memcpy(new_dname + d1->size, d2->name, d2->size);
+
+	// update labels
+	memcpy(new_labels, d1->labels, d1->label_count);
+	for (int i = 0; i < d2->label_count; ++i) {
+		new_labels[d1->label_count + i] = d2->labels[i] + d1->size;
+	}
+
+	uint8_t *old_labels = d1->labels;
+	d1->labels = new_labels;
+	free(old_labels);
+	d1->label_count += d2->label_count;
+
+	uint8_t *old_name = d1->name;
+	d1->name = new_dname;
+	free(old_name);
+
+	d1->size += d2->size;
+
+	return d1;
+}
+
+void knot_dname_set_id(knot_dname_t *dname, unsigned int id)
+{
+	dname->id = id;
+}
+
+unsigned int knot_dname_get_id(const knot_dname_t *dname)
+{
+	if (dname != NULL) {
+		return dname->id;
+	} else {
+		return 0; /* 0 should never be used and is reserved for err. */
+	}
+}
diff --git a/src/libknot/dname.h b/src/libknot/dname.h
new file mode 100644
index 0000000..c0e3f35
--- /dev/null
+++ b/src/libknot/dname.h
@@ -0,0 +1,428 @@
+/*!
+ * \file dname.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Domain name structure and API for manipulating it.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_DNAME_H_
+#define _KNOT_DNAME_H_
+
+#include <stdint.h>
+#include <string.h>
+#include "common/ref.h"
+
+struct knot_node;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure for representing a domain name.
+ *
+ * Stores the domain name in wire format.
+ *
+ * \todo Consider restricting to FQDN only (see knot_dname_new_from_str()).
+ */
+struct knot_dname {
+	ref_t ref;     /*!< Reference counting. */
+	uint8_t *name;	/*!< Wire format of the domain name. */
+	/*!
+	 * \brief Size of the domain name in octets.
+	 * \todo Is this needed? Every dname should end with \0 or pointer.
+	 */
+	unsigned int size;
+	uint8_t *labels;
+	unsigned short label_count;
+	struct knot_node *node; /*!< Zone node the domain name belongs to. */
+	unsigned int id; /*!< ID of domain name used in zone dumping. */
+};
+
+typedef struct knot_dname knot_dname_t;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Creates empty dname structure (no name, no owner node).
+ *
+ * \note Newly created dname is referenced, caller is responsible for releasing
+ *       it after use.
+ *
+ * \return Newly allocated and initialized dname structure.
+ *
+ * \todo Possibly useless.
+ */
+knot_dname_t *knot_dname_new();
+
+/*!
+ * \brief Creates a dname structure from domain name given in presentation
+ *        format.
+ *
+ * The resulting domain name is stored in wire format, but it may not end with
+ * root label (0).
+ *
+ * \note Newly created dname is referenced, caller is responsible for releasing
+ *       it after use.
+ *
+ * \param name Domain name in presentation format (labels separated by dots).
+ * \param size Size of the domain name (count of characters with all dots).
+ * \param node Zone node the domain name belongs to. Set to NULL if not
+ *             applicable.
+ *
+ * \return Newly allocated and initialized dname structure representing the
+ *         given domain name.
+ */
+knot_dname_t *knot_dname_new_from_str(const char *name, unsigned int size,
+                                          struct knot_node *node);
+
+/*!
+ * \brief Creates a dname structure from domain name given in wire format.
+ *
+ * \note The name is copied into the structure.
+ * \note If the given name is not a FQDN, the result will be neither.
+ * \note Newly created dname is referenced, caller is responsible for releasing
+ *       it after use.
+ *
+ * \param name Domain name in wire format.
+ * \param size Size of the domain name in octets.
+ * \param node Zone node the domain name belongs to. Set to NULL if not
+ *             applicable.
+ *
+ * \return Newly allocated and initialized dname structure representing the
+ *         given domain name.
+ *
+ * \todo This function does not check if the given data is in correct wire
+ *       format at all. It thus creates a invalid domain name, which if passed
+ *       e.g. to knot_dname_to_str() may result in crash. Decide whether it
+ *       is OK to retain this and check the data in other functions before
+ *       calling this one, or if it should verify the given data.
+ */
+knot_dname_t *knot_dname_new_from_wire(const uint8_t *name,
+                                           unsigned int size,
+                                           struct knot_node *node);
+
+knot_dname_t *knot_dname_parse_from_wire(const uint8_t *wire,
+                                             size_t *pos, size_t size,
+                                             struct knot_node *node);
+
+/*!
+ * \brief Initializes domain name by the name given in wire format.
+ *
+ * \note The name is copied into the structure.
+ * \note If there is any name in the structure, it will be replaced.
+ * \note If the given name is not a FQDN, the result will be neither.
+ *
+ * \param name Domain name in wire format.
+ * \param size Size of the domain name in octets.
+ * \param node Zone node the domain name belongs to. Set to NULL if not
+ *             applicable.
+ * \param target Domain name structure to initialize.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_ENOMEM if allocation of labels info failed.
+ * \retval KNOT_EBADARG if name or target is null.
+ *
+ * \todo This function does not check if the given data is in correct wire
+ *       format at all. It thus creates a invalid domain name, which if passed
+ *       e.g. to knot_dname_to_str() may result in crash. Decide whether it
+ *       is OK to retain this and check the data in other functions before
+ *       calling this one, or if it should verify the given data.
+ */
+int knot_dname_from_wire(const uint8_t *name, unsigned int size,
+                           struct knot_node *node, knot_dname_t *target);
+
+/*!
+ * \brief Duplicates the given domain name.
+ *
+ * \note Copied dname referense count is reset to 1, caller is responsible
+ *       for releasing it after use.
+ *
+ * \param dname Domain name to be copied.
+ *
+ * \return New domain name which is an exact copy of \a dname.
+ */
+knot_dname_t *knot_dname_deep_copy(const knot_dname_t *dname);
+
+/*!
+ * \brief Converts the given domain name to string representation.
+ *
+ * \note Allocates new memory, remember to free it.
+ *
+ * \param dname Domain name to be converted.
+ *
+ * \return 0-terminated string representing the given domain name in
+ *         presentation format.
+ */
+char *knot_dname_to_str(const knot_dname_t *dname);
+
+int knot_dname_to_lower(knot_dname_t *dname);
+
+int knot_dname_to_lower_copy(const knot_dname_t *dname, char *name, 
+                             size_t size);
+
+/*!
+ * \brief Returns the domain name in wire format.
+ *
+ * \param dname Domain name.
+ *
+ * \return Wire format of the domain name.
+ */
+const uint8_t *knot_dname_name(const knot_dname_t *dname);
+
+/*!
+ * \brief Returns size of the given domain name.
+ *
+ * \param dname Domain name to get the size of.
+ *
+ * \return Size of the domain name in wire format in octets.
+ */
+unsigned int knot_dname_size(const knot_dname_t *dname);
+
+unsigned int knot_dname_id(const knot_dname_t *dname);
+
+/*!
+ * \brief Returns size of a part of domain name.
+ *
+ * \param dname Domain name.
+ * \param labels Count of labels to get the size of (counted from left).
+ *
+ * \return Size of first \a labels labels of \a dname, counted from left.
+ */
+uint8_t knot_dname_size_part(const knot_dname_t *dname, int labels);
+
+/*!
+ * \brief Returns the zone node the domain name belongs to.
+ *
+ * \param dname Domain name to get the zone node of.
+ *
+ * \return Zone node the domain name belongs to or NULL if none.
+ */
+const struct knot_node *knot_dname_node(const knot_dname_t *dname,
+                                            int check_version);
+
+struct knot_node *knot_dname_get_node(knot_dname_t *dname,
+                                          int check_version);
+
+void knot_dname_set_node(knot_dname_t *dname, struct knot_node *node);
+
+void knot_dname_update_node(knot_dname_t *dname);
+
+void knot_dname_set_node(knot_dname_t *dname, struct knot_node *node);
+
+/*!
+ * \brief Checks if the given domain name is a fully-qualified domain name.
+ *
+ * \param dname Domain name to check.
+ *
+ * \retval <> 0 if \a dname is a FQDN.
+ * \retval 0 otherwise.
+ */
+int knot_dname_is_fqdn(const knot_dname_t *dname);
+
+/*!
+ * \brief Creates new domain name by removing leftmost label from \a dname.
+ *
+ * \note Newly created dname reference count is set to 1, caller is responsible
+ *        for releasing it after use.
+ *
+ * \param dname Domain name to remove the first label from.
+ *
+ * \return New domain name with the same labels as \a dname, except for the
+ *         leftmost label, which is removed.
+ */
+knot_dname_t *knot_dname_left_chop(const knot_dname_t *dname);
+
+/*!
+ * \brief Removes leftmost label from \a dname.
+ *
+ * \param dname Domain name to remove the first label from.
+ */
+void knot_dname_left_chop_no_copy(knot_dname_t *dname);
+
+/*!
+ * \brief Checks if one domain name is a subdomain of other.
+ *
+ * \param sub Domain name to be the possible subdomain.
+ * \param domain Domain name to be the possible parent domain.
+ *
+ * \retval <> 0 if \a sub is a subdomain of \a domain.
+ * \retval 0 otherwise.
+ */
+int knot_dname_is_subdomain(const knot_dname_t *sub,
+                              const knot_dname_t *domain);
+
+/*!
+ * \brief Checks if the domain name is a wildcard.
+ *
+ * \param dname Domain name to check.
+ *
+ * \retval <> 0 if \a dname is a wildcard domain name.
+ * \retval 0 otherwise.
+ */
+int knot_dname_is_wildcard(const knot_dname_t *dname);
+
+/*!
+ * \brief Returns the number of labels common for the two domain names (counted
+ *        from the rightmost label.
+ *
+ * \param dname1 First domain name.
+ * \param dname2 Second domain name.
+ *
+ * \return Number of labels common for the two domain names.
+ */
+int knot_dname_matched_labels(const knot_dname_t *dname1,
+                                const knot_dname_t *dname2);
+
+/*!
+ * \brief Returns the number of labels in the domain name.
+ *
+ * \param dname Domain name to get the label count of.
+ *
+ * \return Number of labels in \a dname.
+ *
+ * \todo Find out if this counts the root label also.
+ */
+int knot_dname_label_count(const knot_dname_t *dname);
+
+/*!
+ * \brief Returns the size of the requested label in the domain name.
+ *
+ * \param dname Domain name to get the label size from.
+ * \param i Index of the label (0 is the leftmost label).
+ *
+ * \return Size of \a i-th label in \a dname (counted from left).
+ */
+uint8_t knot_dname_label_size(const knot_dname_t *dname, int i);
+
+/*!
+ * \brief Replaces the suffix of given size in one domain name with other domain
+ *        name.
+ *
+ * \param dname Domain name where to replace the suffix.
+ * \param size Size of the suffix to be replaced.
+ * \param suffix New suffix to be used as a replacement.
+ *
+ * \return New domain name created by replacing suffix of \a dname of size
+ *         \a size with \a suffix.
+ */
+knot_dname_t *knot_dname_replace_suffix(const knot_dname_t *dname,
+                                            int size,
+                                            const knot_dname_t *suffix);
+
+/*!
+ * \brief Destroys the given domain name.
+ *
+ * Frees also the data within the struct. This is somewhat different behaviour
+ * than that of RDATA and RRSet structures which do not deallocate their
+ * contents.
+ *
+ * Sets the given pointer to NULL.
+ *
+ * \param dname Domain name to be destroyed.
+ */
+void knot_dname_free(knot_dname_t **dname);
+
+/*!
+ * \brief Compares two domain names (case insensitive).
+ *
+ * \param d1 First domain name.
+ * \param d2 Second domain name.
+ *
+ * \retval < 0 if \a d1 goes before \a d2 in canonical order.
+ * \retval > 0 if \a d1 goes after \a d2 in canonical order.
+ * \retval 0 if the domain names are identical.
+ */
+int knot_dname_compare(const knot_dname_t *d1, const knot_dname_t *d2);
+
+/*!
+ * \brief Compares two domain names (case sensitive).
+ *
+ * \param d1 First domain name.
+ * \param d2 Second domain name.
+ *
+ * \retval < 0 if \a d1 goes before \a d2 in canonical order.
+ * \retval > 0 if \a d1 goes after \a d2 in canonical order.
+ * \retval 0 if the domain names are identical.
+ */
+int knot_dname_compare_cs(const knot_dname_t *d1, const knot_dname_t *d2);
+
+/*!
+ * \brief Concatenates two domain names.
+ *
+ * \note Member \a node is ignored, i.e. preserved.
+ *
+ * \param d1 First domain name (will be modified).
+ * \param d2 Second domain name (will not be modified).
+ *
+ * \return The concatenated domain name (i.e. modified \a d1) or NULL if
+ *         the operation is not valid (e.g. \a d1 is a FQDN).
+ */
+knot_dname_t *knot_dname_cat(knot_dname_t *d1, const knot_dname_t *d2);
+
+void knot_dname_set_id(knot_dname_t *dname, unsigned int id);
+
+unsigned int knot_dname_get_id(const knot_dname_t *dname);
+
+/*!
+ * \brief Increment reference counter for dname.
+ *
+ * Function makes shallow copy (reference).
+ *
+ * \param dname Referenced dname.
+ */
+static inline void knot_dname_retain(knot_dname_t *dname) {
+	if (dname) {
+		ref_retain(&dname->ref);
+//		char *name = knot_dname_to_str(dname);
+//		printf("retain: %s %p %d\n", name, dname, dname->ref.count);
+//		free(name);
+
+	}
+}
+
+/*#define knot_dname_retain(d) \
+	knot_dname_retain_((d));\
+	if ((d))\
+	printf("dname_retain: %s() at %s:%d, %p refcount=%zu\n",\
+	__func__, __FILE__, __LINE__, d, (d)->ref.count) */
+
+/*!
+ * \brief Decrement reference counter for dname.
+ *
+ * \param dname Referenced dname.
+ */
+static inline void knot_dname_release(knot_dname_t *dname) {
+	if (dname) {
+//		char *name = knot_dname_to_str(dname);
+//		printf("releasing: %p %s %d\n", dname, name, dname->ref.count - 1);
+//		free(name);
+		ref_release(&dname->ref);
+	}
+}
+
+/*#define knot_dname_release(d) \
+	if ((d))\
+	printf("dname_release: %s() at %s:%d, %p refcount=%zu\n",\
+	__func__, __FILE__, __LINE__, d, (d)->ref.count-1);\
+	knot_dname_release_((d)) */
+
+#endif /* _KNOT_DNAME_H_ */
+
+/*! @} */
diff --git a/src/libknot/edns.c b/src/libknot/edns.c
new file mode 100644
index 0000000..05ebd7b
--- /dev/null
+++ b/src/libknot/edns.c
@@ -0,0 +1,416 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "edns.h"
+#include "common.h"
+#include "util/descriptor.h"
+#include "util/debug.h"
+#include "util/error.h"
+
+/*! \brief Various EDNS constatns. */
+enum knot_edns_consts {
+	/*! \brief Mask for the DO bit. */
+	KNOT_EDNS_DO_MASK = (uint16_t)0x8000,
+	/*! \brief Step for allocation of space for option entries. */
+	KNOT_EDNS_OPTION_STEP = 1
+};
+
+/*! \brief Minimum size of EDNS OPT RR in wire format. */
+static const short KNOT_EDNS_MIN_SIZE = 11;
+
+/*----------------------------------------------------------------------------*/
+
+knot_opt_rr_t *knot_edns_new()
+{
+	knot_opt_rr_t *opt_rr = (knot_opt_rr_t *)malloc(
+	                                               sizeof(knot_opt_rr_t));
+	CHECK_ALLOC_LOG(opt_rr, NULL);
+	opt_rr->size = KNOT_EDNS_MIN_SIZE;
+	opt_rr->option_count = 0;
+	opt_rr->options_max = 0;
+
+	opt_rr->ext_rcode = 0;
+	opt_rr->flags = 0;
+	opt_rr->version = 0;
+
+	return opt_rr;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_edns_new_from_wire(knot_opt_rr_t *opt_rr, const uint8_t *wire,
+                              size_t max_size)
+{
+	const uint8_t *pos = wire;
+	int parsed = 0;
+
+	if (pos == NULL || max_size == 0 || opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (max_size < KNOT_EDNS_MIN_SIZE) {
+		dbg_edns("Not enough data to parse OPT RR header.\n");
+		return KNOT_EFEWDATA;
+	}
+
+	// owner of EDNS OPT RR must be root (0)
+	if (*pos != 0) {
+		dbg_edns("EDNS packet malformed (expected root "
+		                  "domain as owner).\n");
+		return KNOT_EMALF;
+	}
+	pos += 1;
+
+	// check the type of the record (must be OPT)
+	if (knot_wire_read_u16(pos) != KNOT_RRTYPE_OPT) {
+		dbg_edns("EDNS packet malformed (expected OPT type"
+		                  ".\n");
+		return KNOT_EMALF;
+	}
+	pos += 2;
+
+	opt_rr->payload = knot_wire_read_u16(pos);
+	dbg_edns("Parsed payload: %u\n", opt_rr->payload);
+
+	pos += 2;
+	opt_rr->ext_rcode = *(pos++);
+	opt_rr->version = *(pos++);
+	opt_rr->flags = knot_wire_read_u16(pos);
+	pos += 2;
+
+	parsed = KNOT_EDNS_MIN_SIZE;
+
+	// ignore RDATA, but move pos behind them
+	uint16_t rdlength = knot_wire_read_u16(pos);
+	pos += 2;
+
+	if (max_size - parsed < rdlength) {
+		dbg_edns("Not enough data to parse OPT RR.\n");
+		return KNOT_EFEWDATA;
+	}
+
+	while (parsed < rdlength + KNOT_EDNS_MIN_SIZE) {
+		if (max_size - parsed < 4) {
+			dbg_edns("Not enough data to parse OPT RR"
+			                  " OPTION header.\n");
+			return KNOT_EFEWDATA;
+		}
+		uint16_t code = knot_wire_read_u16(pos);
+		pos += 2;
+		uint16_t length = knot_wire_read_u16(pos);
+		pos += 2;
+		dbg_edns("EDNS OPTION: Code: %u, Length: %u\n",
+		                  code, length);
+		if (max_size - parsed - 4 < length) {
+			dbg_edns("Not enough data to parse OPT RR"
+			                  " OPTION data.\n");
+			return KNOT_EFEWDATA;
+		}
+		int ret;
+		if ((ret =
+		     knot_edns_add_option(opt_rr, code, length, pos)) != 0) {
+			dbg_edns("Error parsing OPT option field.\n");
+			return ret;
+		}
+		pos += length;
+		parsed += length + 4;
+	}
+
+	return parsed;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_edns_new_from_rr(knot_opt_rr_t *opt_rr,
+                            const knot_rrset_t *rrset)
+{
+	if (opt_rr == NULL || rrset == NULL
+	    || knot_rrset_type(rrset) != KNOT_RRTYPE_OPT) {
+		return KNOT_EBADARG;
+	}
+
+	dbg_edns("Parsing payload.\n");
+	opt_rr->payload = knot_rrset_class(rrset);
+
+	// the TTL has switched bytes
+	uint32_t ttl;
+	dbg_edns("TTL: %u\n", knot_rrset_ttl(rrset));
+	knot_wire_write_u32((uint8_t *)&ttl, knot_rrset_ttl(rrset));
+	// first byte of TTL is extended RCODE
+	dbg_edns("TTL: %u\n", ttl);
+	memcpy(&opt_rr->ext_rcode, &ttl, 1);
+	dbg_edns("Parsed extended RCODE: %u.\n", opt_rr->ext_rcode);
+	// second is the version
+	memcpy(&opt_rr->version, (const uint8_t *)(&ttl) + 1, 1);
+	dbg_edns("Parsed version: %u.\n", opt_rr->version);
+	// third and fourth are flags
+	opt_rr->flags = knot_wire_read_u16((const uint8_t *)(&ttl) + 2);
+	dbg_edns("Parsed flags: %u.\n", opt_rr->flags);
+	// size of the header, options are counted elsewhere
+	opt_rr->size = 11;
+
+	int rc = 0;
+	dbg_edns("Parsing options.\n");
+	const knot_rdata_t *rdata = knot_rrset_rdata(rrset);
+
+	// in OPT RR, all RDATA are in one RDATA item stored as BINARY data,
+	// i.e. preceded by their length
+	if (rdata != NULL) {
+		assert(knot_rdata_item_count(rdata) == 1);
+		const uint8_t *raw = (const uint8_t *)
+		                      knot_rdata_item(rdata, 0)->raw_data;
+		uint16_t size = knot_wire_read_u16(raw);
+		int pos = 2;
+		assert(size > 0);
+		while (pos - 2 < size) {
+			// ensure there is enough data to parse the OPTION CODE
+			// and OPTION LENGTH
+			if (size - pos + 2 < 4) {
+				return KNOT_EMALF;
+			}
+			uint16_t opt_code = knot_wire_read_u16(raw + pos);
+			uint16_t opt_size = knot_wire_read_u16(raw + pos + 2);
+
+			// there should be enough data for parsing the OPTION
+			// data
+			if (size - pos - 2 < opt_size) {
+				return KNOT_EMALF;
+			}
+			rc = knot_edns_add_option(opt_rr, opt_code, opt_size,
+			                          raw + pos + 4);
+			if (rc != KNOT_EOK) {
+				return rc;
+			}
+			pos += 4 + opt_size;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_edns_get_payload(const knot_opt_rr_t *opt_rr)
+{
+	assert(opt_rr != NULL);
+	return opt_rr->payload;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_edns_set_payload(knot_opt_rr_t *opt_rr,
+                             uint16_t payload)
+{
+	assert(opt_rr != NULL);
+	opt_rr->payload = payload;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint8_t knot_edns_get_ext_rcode(const knot_opt_rr_t *opt_rr)
+{
+	return opt_rr->ext_rcode;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_edns_set_ext_rcode(knot_opt_rr_t *opt_rr,
+                               uint8_t ext_rcode)
+{
+	assert(opt_rr != NULL);
+	opt_rr->ext_rcode = ext_rcode;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint8_t knot_edns_get_version(const knot_opt_rr_t *opt_rr)
+{
+	assert(opt_rr != NULL);
+	return opt_rr->version;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_edns_set_version(knot_opt_rr_t *opt_rr,
+                                           uint8_t version)
+{
+	assert(opt_rr != NULL);
+	opt_rr->version = version;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_edns_get_flags(const knot_opt_rr_t *opt_rr)
+{
+	assert(opt_rr != NULL);
+	return opt_rr->flags;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_edns_do(const knot_opt_rr_t *opt_rr)
+{
+	if (opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	dbg_edns("Flags: %u\n", opt_rr->flags);
+	return (opt_rr->flags & KNOT_EDNS_DO_MASK);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_edns_set_do(knot_opt_rr_t *opt_rr)
+{
+	if (opt_rr == NULL) {
+		return;
+	}
+
+	opt_rr->flags |= KNOT_EDNS_DO_MASK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_edns_add_option(knot_opt_rr_t *opt_rr, uint16_t code,
+                           uint16_t length, const uint8_t *data)
+{
+	if (opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (opt_rr->option_count == opt_rr->options_max) {
+		knot_opt_option_t *options_new =
+			(knot_opt_option_t *)calloc(
+				(opt_rr->options_max + KNOT_EDNS_OPTION_STEP),
+				sizeof(knot_opt_option_t));
+		CHECK_ALLOC_LOG(options_new, KNOT_ENOMEM);
+		memcpy(options_new, opt_rr->options, opt_rr->option_count);
+		opt_rr->options = options_new;
+		opt_rr->options_max += KNOT_EDNS_OPTION_STEP;
+	}
+
+	dbg_edns("Adding option.\n");
+	dbg_edns("Code: %u.\n", code);
+	dbg_edns("Length: %u.\n", length);
+	dbg_edns("Data: %p.\n", data);
+
+	opt_rr->options[opt_rr->option_count].data = (uint8_t *)malloc(length);
+	CHECK_ALLOC_LOG(opt_rr->options[opt_rr->option_count].data, KNOT_ENOMEM);
+	memcpy(opt_rr->options[opt_rr->option_count].data, data, length);
+
+	opt_rr->options[opt_rr->option_count].code = code;
+	opt_rr->options[opt_rr->option_count].length = length;
+
+	++opt_rr->option_count;
+	opt_rr->size += 4 + length;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_edns_has_option(const knot_opt_rr_t *opt_rr, uint16_t code)
+{
+	if (opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int i = 0;
+	while (i < opt_rr->option_count && opt_rr->options[i].code != code) {
+		++i;
+	}
+
+	assert(i >= opt_rr->option_count || opt_rr->options[i].code == code);
+
+	return (i < opt_rr->option_count);
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_edns_to_wire(const knot_opt_rr_t *opt_rr, uint8_t *wire,
+                          size_t max_size)
+{
+	if (opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	assert(KNOT_EDNS_MIN_SIZE <= max_size);
+
+	if (max_size < opt_rr->size) {
+		dbg_edns("Not enough place for OPT RR wire format.\n");
+		return KNOT_ESPACE;
+	}
+
+	uint8_t *pos = wire;
+	*(pos++) = 0;
+	knot_wire_write_u16(pos, KNOT_RRTYPE_OPT);
+	pos += 2;
+	knot_wire_write_u16(pos, opt_rr->payload);
+	pos += 2;
+	*(pos++) = opt_rr->ext_rcode;
+	*(pos++) = opt_rr->version;
+	knot_wire_write_u16(pos, opt_rr->flags);
+	pos += 2;
+
+	uint8_t *rdlen = pos;
+	uint16_t len = 0;
+	pos += 2;
+
+	// OPTIONs
+	for (int i = 0; i < opt_rr->option_count; ++i) {
+		knot_wire_write_u16(pos, opt_rr->options[i].code);
+		pos += 2;
+		knot_wire_write_u16(pos, opt_rr->options[i].length);
+		pos += 2;
+		memcpy(pos, opt_rr->options[i].data, opt_rr->options[i].length);
+		pos += opt_rr->options[i].length;
+		len += 4 + opt_rr->options[i].length;
+	}
+
+	knot_wire_write_u16(rdlen, len);
+
+	return opt_rr->size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_edns_size(knot_opt_rr_t *opt_rr)
+{
+	if (opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return opt_rr->size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_edns_free(knot_opt_rr_t **opt_rr)
+{
+	if (opt_rr == NULL || *opt_rr == NULL) {
+		return;
+	}
+
+	if ((*opt_rr)->option_count > 0) {
+		free((*opt_rr)->options);
+	}
+	free(*opt_rr);
+	*opt_rr = NULL;
+}
diff --git a/src/libknot/edns.h b/src/libknot/edns.h
new file mode 100644
index 0000000..010d155
--- /dev/null
+++ b/src/libknot/edns.h
@@ -0,0 +1,273 @@
+/*!
+ * \file edns.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Functions for manipulating and parsing EDNS OPT pseudo-RR.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_EDNS_H_
+#define _KNOT_EDNS_H_
+
+#include <stdint.h>
+
+#include "util/utils.h"
+#include "rrset.h"
+
+/*----------------------------------------------------------------------------*/
+/*! \brief Structure representing one OPT RR Option. */
+struct knot_opt_option {
+	uint16_t code;
+	uint16_t length;
+	uint8_t *data;
+};
+
+/*! \brief Structure representing one OPT RR Option. */
+typedef struct knot_opt_option knot_opt_option_t;
+
+/*!
+ * \brief Structure for holding EDNS parameters.
+ *
+ * \todo NSID
+ */
+struct knot_opt_rr {
+	uint16_t payload;    /*!< UDP payload. */
+	uint8_t ext_rcode;   /*!< Extended RCODE. */
+
+	/*!
+	 * \brief Supported version of EDNS.
+	 *
+	 * Set to EDNS_NOT_SUPPORTED if not supported.
+	 */
+	uint8_t version;
+
+	uint16_t flags;                /*!< EDNS flags. */
+	knot_opt_option_t *options;  /*!< EDNS options. */
+	short option_count;         /*!< Count of EDNS options in this OPT RR.*/
+	short options_max;          /*!< Maximum count of options. */
+	short size;             /*!< Total size of the OPT RR in wire format. */
+};
+
+/*! \brief Structure for holding EDNS parameters. */
+typedef struct knot_opt_rr knot_opt_rr_t;
+
+/*----------------------------------------------------------------------------*/
+/*! \brief Constants for supported versions of EDNS. */
+enum knot_edns_versions {
+	EDNS_VERSION_0 = (uint8_t)0,       /*!< EDNS version 0. */
+	EDNS_NOT_SUPPORTED = (uint8_t)255  /*!< EDNS not supported. */
+};
+
+/*! \brief Constants for EDNS option codes. */
+enum knot_edns_option_codes {
+	EDNS_OPTION_NSID = (uint16_t)3 /*!< NSID option code. */
+};
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates new empty OPT RR structure for holding EDNS parameters.
+ *
+ * \return New empty knot_opt_rr_t structure, or NULL if not successful.
+ */
+knot_opt_rr_t *knot_edns_new();
+
+/*!
+ * \brief Initializes OPT RR structure from given OPT RR in wire format.
+ *
+ * \param opt_rr OPT RR structure to initialize.
+ * \param wire Wire format of the OPT RR to parse.
+ * \param max_size Maximum size of the wire format in bytes (may be more
+ *                 than acutal size of the OPT RR).
+ *
+ * \return Size of the parserd OPT RR in bytes if successful (always > 0).
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EFEWDATA
+ * \retval KNOT_EMALF
+ * \retval KNOT_ENOMEM
+ */
+int knot_edns_new_from_wire(knot_opt_rr_t *opt_rr, const uint8_t *wire,
+                              size_t max_size);
+
+int knot_edns_new_from_rr(knot_opt_rr_t *opt_rr,
+                            const knot_rrset_t *rrset);
+
+/*!
+ * \brief Returns the UDP payload stored in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to get the payload from.
+ *
+ * \return UDP payload in bytes.
+ */
+uint16_t knot_edns_get_payload(const knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Sets the UDP payload field in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to set the payload to.
+ * \param payload UDP payload in bytes.
+ */
+void knot_edns_set_payload(knot_opt_rr_t *opt_rr, uint16_t payload);
+
+/*!
+ * \brief Returns the Extended RCODE stored in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to get the Extended RCODE from.
+ *
+ * \return Extended RCODE.
+ */
+uint8_t knot_edns_get_ext_rcode(const knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Sets the Extended RCODE field in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to set the Extended RCODE to.
+ * \param ext_rcode Extended RCODE to set.
+ */
+void knot_edns_set_ext_rcode(knot_opt_rr_t *opt_rr, uint8_t ext_rcode);
+
+/*!
+ * \brief Returns the EDNS version stored in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to get the EDNS version from.
+ *
+ * \return EDNS version.
+ */
+uint8_t knot_edns_get_version(const knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Sets the EDNS version field in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to set the EDNS version to.
+ * \param version EDNS version to set.
+ */
+void knot_edns_set_version(knot_opt_rr_t *opt_rr, uint8_t version);
+
+/*!
+ * \brief Returns the flags stored in the OPT RR.
+ *
+ * \warning This function does not check the parameter, so ensure to check it
+ *          before calling the function. It must not be NULL.
+ * \note There is an assert() for debug checking of the parameter.
+ *
+ * \param opt_rr OPT RR structure to get the flags from.
+ *
+ * \return EDNS flags.
+ */
+uint16_t knot_edns_get_flags(const knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Returns the state of the DO bit in the OPT RR flags.
+ *
+ * \param opt_rr OPT RR structure to get the DO bit from.
+ *
+ * \return <> 0 if the DO bit is set.
+ * \return 0 if the DO bit is not set.
+ */
+int knot_edns_do(const knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Sets the DO bit in the OPT RR.
+ *
+ * \param opt_rr OPT RR structure to set the DO bit in.
+ */
+void knot_edns_set_do(knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Adds EDNS Option to the OPT RR.
+ *
+ * \param opt_rr OPT RR structure to add the Option to.
+ * \param code Option code.
+ * \param length Option data length in bytes.
+ * \param data Option data.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+int knot_edns_add_option(knot_opt_rr_t *opt_rr, uint16_t code,
+                           uint16_t length, const uint8_t *data);
+
+/*!
+ * \brief Checks if the OPT RR contains Option with the specified code.
+ *
+ * \param opt_rr OPT RR structure to check for the Option in.
+ * \param code Option code to check for.
+ *
+ * \retval <> 0 if the OPT RR contains Option with Option code \a code.
+ * \retval 0 otherwise.
+ */
+int knot_edns_has_option(const knot_opt_rr_t *opt_rr, uint16_t code);
+
+/*!
+ * \brief Converts the given OPT RR into wire format.
+ *
+ * \param opt_rr OPT RR structure to convert into wire format.
+ * \param wire Place to put the wire format to.
+ * \param max_size Maximum space available for the wire format in bytes.
+ *
+ * \return Size of the wire format in bytes if successful.
+ * \retval KNOT_ESPACE
+ */
+short knot_edns_to_wire(const knot_opt_rr_t *opt_rr, uint8_t *wire,
+                          size_t max_size);
+
+/*!
+ * \brief Returns size of the OPT RR in wire format.
+ *
+ * \param opt_rr OPT RR to get the size of.
+ *
+ * \return Size of the OPT RR in bytes.
+ */
+short knot_edns_size(knot_opt_rr_t *opt_rr);
+
+/*!
+ * \brief Properly destroys the OPT RR structure.
+ *
+ * \note Also sets the given pointer to NULL.
+ */
+void knot_edns_free(knot_opt_rr_t **opt_rr);
+
+#endif /* _KNOT_EDNS_H_ */
+
+/*! @} */
diff --git a/src/libknot/hash/cuckoo-hash-table.c b/src/libknot/hash/cuckoo-hash-table.c
new file mode 100644
index 0000000..c5d1c4f
--- /dev/null
+++ b/src/libknot/hash/cuckoo-hash-table.c
@@ -0,0 +1,1688 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>     /* defines uint32_t etc */
+#include <assert.h>
+#include <pthread.h>
+#include <math.h>
+
+#include <urcu.h>
+
+#include "util/utils.h"
+#include "common.h"
+#include "util/debug.h"
+#include "hash/cuckoo-hash-table.h"
+#include "hash/hash-functions.h"
+#include "common/dynamic-array.h"
+
+/*----------------------------------------------------------------------------*/
+/* Macros and inline functions                                                */
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Default size table holding information about used hash table cells
+ *        when hashing.
+ */
+#define RELOCATIONS_DEFAULT 200
+
+/*!
+ * \brief Maximum size table holding information about used hash table cells
+ *        when hashing (just for debug issues).
+ */
+#define RELOCATIONS_MAX 1000
+
+/*!
+ * \brief Macro for hashing the given key using the universal system.
+ *
+ * \param system Universal system to use for the hashing.
+ * \param key Key to hash.
+ * \param length Size of the key in bytes.
+ * \param exp Exponent of the hash table size (the size is a power of 2).
+ * \param table Hash table index.
+ * \param gen Universal system generation.
+ *
+ * \return Hashed key.
+ */
+#define HASH(system, key, length, exp, gen, table) \
+	us_hash(system, fnv_32_buf(key, length, FNV1_32_INIT), exp, table, gen)
+
+/*!
+ * \brief Approximate ratio of hash table size to number of hashed items when 2
+ *        tables are used.
+ */
+static const float SIZE_RATIO_2 = 2;
+
+/*!
+ * \brief Approximate ratio of hash table size to number of hashed items when 3
+ *        tables are used.
+ */
+static const float SIZE_RATIO_3 = 1.15;
+
+/*!
+ * \brief Approximate ratio of hash table size to number of hashed items when 4
+ *        tables are used.
+ */
+static const float SIZE_RATIO_4 = 1.08;
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Flag marking the generation of hash table or its item to be 1. */
+static const uint8_t FLAG_GENERATION1     = 0x1; // 00000001
+/*! \brief Flag marking the generation of hash table or its item to be 2. */
+static const uint8_t FLAG_GENERATION2     = 0x2; // 00000010
+/*! \brief Flag marking both generations. */
+static const uint8_t FLAG_GENERATION_BOTH = 0x3; // 00000011
+
+/*! \brief Flag used to mark the table when it's being rehashed. */
+static const uint8_t FLAG_REHASH          = 0x4; // 00000100
+
+/*----------------------------------------------------------------------------*/
+/*! \brief Clears the table / item flags. */
+static inline void CLEAR_FLAGS(uint8_t *flags)
+{
+	*flags = (uint8_t)0x0;
+}
+
+/*! \brief Returns the generation stored in the flags. */
+static inline uint8_t GET_GENERATION(uint8_t flags)
+{
+	return (flags & FLAG_GENERATION_BOTH);
+}
+
+/*! \brief Checks if the generation stored in both flags are the same. */
+static inline int EQUAL_GENERATIONS(uint8_t flags1, uint8_t flags2)
+{
+	return (GET_GENERATION(flags1) == GET_GENERATION(flags2));
+}
+
+/*! \brief Checks if the generation stored in the flags is 1. */
+static inline int IS_GENERATION1(uint8_t flags)
+{
+	return ((flags & FLAG_GENERATION1) != 0);
+}
+
+/*! \brief Sets the generation stored in the flags to 1. */
+static inline void SET_GENERATION1(uint8_t *flags)
+{
+	*flags = ((*flags) & ~FLAG_GENERATION2) | FLAG_GENERATION1;
+}
+
+/*! \brief Checks if the generation stored in the flags is 2. */
+static inline int IS_GENERATION2(uint8_t flags)
+{
+	return ((flags & FLAG_GENERATION2) != 0);
+}
+
+/*! \brief Sets the generation stored in the flags to 2. */
+static inline void SET_GENERATION2(uint8_t *flags)
+{
+	*flags = ((*flags) & ~FLAG_GENERATION1) | FLAG_GENERATION2;
+}
+
+/*! \brief Sets the generation stored in the flags to the given generation. */
+static inline void SET_GENERATION(uint8_t *flags, uint8_t generation)
+{
+	*flags = ((*flags) & ~FLAG_GENERATION_BOTH) | generation;
+}
+
+/*! \brief Sets the generation stored in the flags to the next one (cyclic). */
+static inline uint8_t SET_NEXT_GENERATION(uint8_t *flags)
+{
+	return ((*flags) ^= FLAG_GENERATION_BOTH);
+}
+
+/*! \brief Returns the next generation to the one stored in flags (cyclic). */
+static inline uint8_t NEXT_GENERATION(uint8_t flags)
+{
+	return ((flags & FLAG_GENERATION_BOTH) ^ FLAG_GENERATION_BOTH);
+}
+
+/*! \brief Sets the rehashing flag to the flags. */
+static inline void SET_REHASHING_ON(uint8_t *flags)
+{
+	*flags = (*flags | FLAG_REHASH);
+}
+
+/*! \brief Removes the rehashing flag from the flags. */
+static inline void SET_REHASHING_OFF(uint8_t *flags)
+{
+	*flags = (*flags & ~FLAG_REHASH);
+}
+
+/*! \brief Checks if the rehashing flag is set in the flags. */
+static inline int IS_REHASHING(uint8_t flags)
+{
+	return ((flags & FLAG_REHASH) != 0);
+}
+
+/*----------------------------------------------------------------------------*/
+/* Private functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns the exponent of the nearest larger power of two.
+ */
+static uint get_larger_exp(uint n)
+{
+	uint res = 0;
+	while (hashsize(++res) < n) {}
+
+	return res;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Counts the ideal table count and the exponent of those tables' sizes.
+ *
+ * Only 3 or 4 hash tables are considered. The setup in which less items are
+ * wasted is recommended.
+ *
+ * \param items Number of items to hash.
+ * \param table_count Recommended number of tables will be saved here.
+ *
+ * \return Exponent of the tables' sizes.
+ */
+static uint get_table_exp_and_count(uint items, uint *table_count)
+{
+	// considering only 3 or 4 tables
+	int exp3 = get_larger_exp((items * SIZE_RATIO_3) / 3);
+	int exp4 = get_larger_exp(items * SIZE_RATIO_4) - 2;
+	
+	if (exp4 < 0) {
+		exp4 = 1;
+	}
+
+	dbg_ck("Determining ideal table size...\n");
+	dbg_ck("\tNumber of items: %u\n", items);
+	dbg_ck("\tThree tables: size of one table: %u, total size: %u\n",
+	         hashsize(exp3), 3 * hashsize(exp3));
+	dbg_ck("\tFour tables: size of one table: %u, total size: %u\n",
+	         hashsize(exp4), 4 * hashsize(exp4));
+
+	// we need exponent at least 1 (this is quite ugly..)
+	if (exp3 == 0) {
+		exp3 = 1;
+	}
+	if (exp4 == 0) {
+		exp4 = 1;
+	}
+	
+	if (exp3 >= 32 || exp4 >= 32) {
+		return 0;
+	}
+	
+	if (((hashsize(exp3) * 3) - (items)) < ((hashsize(exp4) * 4) - items)) {
+		*table_count = 3;
+		return exp3;
+	} else {
+		*table_count = 4;
+		return exp4;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Counts the maximum effective item count based on size of the tables.
+ *
+ * For 3 tables, the effective utilization should be around 91%.
+ * For 4 tables it is 97%.
+ *
+ * See Fotakis, Dimitris, et al. - Space Efficient Hash Tables with Worst Case
+ * Constant Access Time. CiteSeerX. 2003
+ * http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.5337
+ */
+static uint get_max_table_items(uint table_count, int table_exponent)
+{
+	assert(table_count == 3 || table_count == 4);
+	
+	float coef;
+	
+	if (table_count == 3) {
+		coef = 0.91;
+	} else {
+		coef = 0.97;
+	}
+	
+	return (uint)floor((table_count * hashsize(table_exponent)) * coef);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ck_is_full(const ck_hash_table_t *table)
+{
+	return (table->items >= get_max_table_items(table->table_count, 
+	                                            table->table_size_exp));
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ck_stash_is_full(const ck_hash_table_t *table)
+{
+	return (table->items_in_stash >= STASH_SIZE_MAX);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Clears the given item by assigning a NULL pointer to it.
+ */
+static inline void ck_clear_item(ck_hash_table_item_t **item)
+{
+	*item = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Insert given contents to the hash table item.
+ */
+static void ck_fill_item(const char *key, size_t key_length, void *value,
+                         uint generation, ck_hash_table_item_t *item)
+{
+	// must allocate new space for key and value, otherwise it will be lost!
+	item->key = key;
+	item->key_length = key_length;
+	item->value = value;
+	CLEAR_FLAGS(&item->timestamp);
+	item->timestamp = generation;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Swaps two hash table items.
+ */
+static inline void ck_swap_items(ck_hash_table_item_t **item1,
+                                 ck_hash_table_item_t **item2)
+{
+	ck_hash_table_item_t *tmp = *item1;
+	*item1 = *item2;
+	*item2 = tmp;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets the \a item pointer to the \a to pointer.
+ */
+static inline void ck_put_item(ck_hash_table_item_t **to,
+                               ck_hash_table_item_t *item)
+{
+	*to = item;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks if the hash was already used twice.
+ *
+ * If yes, it means we entered a loop in the hashing process, so we must stop.
+ * Otherwise it remembers that we used the hash.
+ *
+ * \note According to Kirsch, et al. a check that at most one hash was used
+ *       twice should be sufficient. We will retain our version for now.
+ *
+ * \param used Array of used table indices (hashes).
+ * \param hash Hash to check.
+ *
+ * \retval -1 if the hash was already used twice.
+ * \retval -2 if an error occured.
+ * \retval 0 if the hash was not used twice yet.
+ */
+static uint ck_check_used_twice(da_array_t *used, uint32_t hash)
+{
+	uint i = 0, found = 0;
+	while (i <= da_get_count(used) && found < 2) {
+		++i;
+		if (((uint *)(da_get_items(used)))[i] == hash) {
+			++found;
+		}
+	}
+
+	if (i <= da_get_count(used) && found == 2) {
+		dbg_ck_hash("Hashing entered infinite loop.\n");
+		return -1;
+	} else {
+		if (da_reserve(used, 1) < 0) {
+			ERR_ALLOC_FAILED;
+			return -2;
+		}
+		((uint *)da_get_items(used))[da_get_count(used)] = hash;
+		da_occupy(used, 1);
+		assert(da_get_count(used) < RELOCATIONS_MAX);
+		return 0;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Compares the key of item with the given key.
+ *
+ * \param item Item to compare with.
+ * \param key Key to compare.
+ * \param length Size of the key in bytes.
+ *
+ * \return <> 0 if the keys match.
+ * \return 0 if they don't.
+ */
+static inline uint ck_items_match(const ck_hash_table_item_t *item,
+                                  const char *key, size_t length)
+{
+	return (length == item->key_length
+	        && (strncmp(item->key, key, length) == 0));
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Switches the given table number to a randomly chosen other table
+ *        number.
+ */
+static inline void ck_next_table(uint *table, uint table_count)
+{
+	uint next;
+	while ((*table) == (next = knot_quick_rand() % table_count)) {}
+	*table = next;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to find the given key in the hash table's stash.
+ *
+ * \param table Hash table to search in.
+ * \param key Key to find.
+ * \param length Size of the key in bytes.
+ *
+ * \return Hash table item matching the key or NULL if not found in the stash.
+ */
+static ck_hash_table_item_t **ck_find_in_stash(const ck_hash_table_t *table,
+                                               const char *key, uint length)
+{
+	ck_stash_item_t *item = table->stash;
+	while (item != NULL) {
+		dbg_ck("Comparing item in stash (key: %.*s (size %zu))"
+		         "with searched item (key %.*s (size %u)).\n",
+		         (int)item->item->key_length, item->item->key,
+		         item->item->key_length, (int)length, key, length);
+		if (ck_items_match(item->item, key, length)) {
+			return &item->item;
+		}
+		item = item->next;
+	}
+
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to find item with given key using hash functions from the given
+ *        generation.
+ *
+ * \param table Hash table to search in.
+ * \param key Key to find.
+ * \param length Size of the key in bytes.
+ * \param generation Generation of items (table) to use. Items having other
+ *                   generation are ignored.
+ */
+static ck_hash_table_item_t **ck_find_gen(const ck_hash_table_t *table,
+                                          const char *key,
+                                          size_t length, uint8_t generation)
+{
+	uint32_t hash;
+	dbg_ck("Finding item in generation: %u\n", generation);
+
+	// check hash tables
+	for (uint t = 0; t < table->table_count; ++t) {
+		hash = HASH(&table->hash_system, key, length,
+		            table->table_size_exp, generation, t);
+
+		dbg_ck("Hash: %u, key: %.*s\n", hash, (int)length, key);
+		dbg_ck("Table %d, hash: %u, item: %p\n", t + 1, hash,
+		         table->tables[t][hash]);
+		if (table->tables[t][hash] != NULL) {
+			dbg_ck("Table %u, key: %.*s, value: %p, key "
+			         "length: %zu\n",
+			         t + 1, (int)table->tables[t][hash]->key_length,
+			         table->tables[t][hash]->key,
+			         table->tables[t][hash]->value,
+			         table->tables[t][hash]->key_length);
+		}
+
+		if (table->tables[t][hash] &&
+		    ck_items_match(table->tables[t][hash], key, length)) {
+			// found
+			return &table->tables[t][hash];
+		}
+	}
+
+	// try to find in stash
+	dbg_ck("Searching in stash...\n");
+
+	ck_hash_table_item_t **found =
+	        ck_find_in_stash(table, key, length);
+
+	dbg_ck("Found pointer: %p\n", found);
+	if (found != NULL) {
+		dbg_ck("Stash, key: %.*s, value: %p, key length: %zu\n",
+		         (int)(*found)->key_length, (*found)->key,
+	                 (*found)->value, (*found)->key_length);
+	}
+
+	// ck_find_in_buffer returns NULL if not found, otherwise pointer to
+	// item
+	return found;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Finds item with given key and returns non-constant pointer to pointer
+ *        to the appropriate hash table item.
+ *
+ * \param table Hash table to search in.
+ * \param key Key to find.
+ * \param length Size of the key in bytes.
+ */
+static ck_hash_table_item_t **ck_find_item_nc(const ck_hash_table_t *table,
+                                              const char *key, size_t length)
+{
+	// get the generation of the table so that we use the same value
+	uint8_t generation = table->generation;
+
+	// find item using the table generation's hash functions
+	ck_hash_table_item_t **found = ck_find_gen(table, key, length,
+	                                           GET_GENERATION(generation));
+	// if rehashing is in progress, try the next generation's functions
+	if (!found && IS_REHASHING(generation)) {
+		found = ck_find_gen(table, key, length,
+		                    NEXT_GENERATION(generation));
+	}
+
+	return found;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Hashes the given item using the given generation.
+ *
+ * \param table Hash table where to put the item.
+ * \param to_hash In: Item to hash. Out: NULL if successful, item that failed
+ *                to hash if not.
+ * \param free Free place where to put the last moved item when the hasing
+ *             is unsuccessful.
+ * \param generation Generation of items (table) to be used for hashing.
+ *
+ * \retval 0 if successful and no loop occured.
+ * \retval 1 if a loop occured and the item was inserted to the \a free place.
+ */
+static int ck_hash_item(ck_hash_table_t *table, ck_hash_table_item_t **to_hash,
+                        ck_hash_table_item_t **free, uint8_t generation)
+{
+	da_array_t used[table->table_count];
+	for (uint i = 0; i < table->table_count; ++i) {
+		da_initialize(&used[i], RELOCATIONS_DEFAULT, sizeof(uint));
+	}
+
+	// hash until empty cell is encountered or until loop appears
+
+	dbg_ck_hash("Hashing key: %.*s of size %zu.\n",
+	              (int)(*to_hash)->key_length, (*to_hash)->key,
+	              (*to_hash)->key_length);
+
+	uint next_table = 0;
+
+	uint32_t hash = HASH(&table->hash_system, (*to_hash)->key,
+	                     (*to_hash)->key_length, table->table_size_exp,
+	                     generation, next_table);
+
+	dbg_ck_hash("New hash: %u.\n", hash);
+	assert(hash < hashsize(table->table_size_exp));
+
+	((uint *)da_get_items(&used[next_table]))
+	[da_get_count(&used[next_table])] = hash;
+	ck_hash_table_item_t **next = &table->tables[next_table][hash];
+	dbg_ck_hash("Item to be moved: %p, place in table: %p\n",
+	              *next, next);
+	ck_hash_table_item_t **moving = to_hash;
+
+	int loop = 0;
+
+	while (*next != NULL) {
+		dbg_ck_hash("Swapping items to hash: %p and Moving: %p\n",
+		              to_hash, moving);
+		ck_swap_items(to_hash, moving); // first time it's unnecessary
+
+		// set the generation of the inserted item to the next
+		SET_GENERATION(&(*moving)->timestamp, generation);
+
+		moving = next;
+
+		dbg_ck_hash("Moving item from table %u, key: %.*s, hash %u ",
+		              next_table + 1, (int)(*moving)->key_length,
+		              (*moving)->key, hash);
+
+		// if rehashing and the 'next' item is from the old generation,
+		// start from table 1
+		if (generation != table->generation &&
+		    EQUAL_GENERATIONS((*next)->timestamp, table->generation)) {
+			next_table = 0;
+		} else {
+			ck_next_table(&next_table, table->table_count);
+		}
+
+		hash = HASH(&table->hash_system, (*next)->key,
+		            (*next)->key_length, table->table_size_exp,
+		            generation, next_table);
+
+		next = &table->tables[next_table][hash];
+
+		dbg_ck_hash("to table %u, hash %u, item: %p, place: %p\n",
+		              next_table + 1, hash, *next, next);
+
+		if ((*next) != NULL) {
+			dbg_ck_hash("Table %u, hash: %u, key: %.*s\n",
+			              next_table + 1, hash,
+			              (int)(*next)->key_length, (*next)->key);
+		}
+
+		// check if this cell wasn't already used in this item's hashing
+		if (ck_check_used_twice(&used[next_table], hash) != 0) {
+			next = free;
+			loop = -1;
+			break;
+		}
+	}
+
+	dbg_ck_hash("Putting pointer %p (*moving) to item %p (next).\n",
+	              *moving, next);
+
+	ck_put_item(next, *moving);
+	// set the new generation for the inserted item
+	SET_GENERATION(&(*next)->timestamp, generation);
+	dbg_ck_hash("Putting pointer %p (*old) to item %p (moving).\n",
+	              *to_hash, moving);
+
+	ck_put_item(moving, *to_hash);
+
+	// set the new generation for the inserted item
+	SET_GENERATION(&(*moving)->timestamp, generation);
+	*to_hash = NULL;
+
+	for (uint i = 0; i < table->table_count; ++i) {
+		da_destroy(&used[i]);
+	}
+
+	return loop;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void ck_rollback_rehash(ck_hash_table_t *table)
+{
+	// set old generation in tables
+	for (int i = 0; i < hashsize(table->table_size_exp); ++i) {
+		// no need for locking - timestamp is not used in lookup
+		// and two paralel insertions (and thus rehashings) are
+		// impossible
+		for (uint t = 0; t < table->table_count; ++t) {
+			if (table->tables[t][i] != NULL) {
+				SET_GENERATION(&table->tables[t][i]->timestamp,
+				               table->generation);
+			}
+		}
+	}
+
+	// set old generation in stash
+	ck_stash_item_t *item = table->stash;
+	while (item != NULL) {
+		assert(item->item != NULL);
+		SET_GENERATION(&item->item->timestamp, table->generation);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds the given item to the hash table's stash.
+ *
+ * \param table Hash table to add the item to.
+ * \param item Item to add.
+ *
+ * \retval 0 if successful.
+ * \retval -1 if an error occured.
+ */
+int ck_add_to_stash(ck_hash_table_t *table, ck_hash_table_item_t *item)
+{
+	ck_stash_item_t *new_item
+		= (ck_stash_item_t *)malloc(sizeof(ck_stash_item_t));
+	if (new_item == NULL) {
+		ERR_ALLOC_FAILED;
+		return -1;
+	}
+
+	new_item->item = item;
+	new_item->next = table->stash;
+	table->stash = new_item;
+
+	dbg_ck_hash("First item in stash (now inserted): key: %.*s (size %zu)"
+	              ", value: %p\n", (int)table->stash->item->key_length,
+	              table->stash->item->key, table->stash->item->key_length,
+	              table->stash->item->value);
+	
+	// increase count of items in stash
+	++table->items_in_stash;
+	
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ck_new_table(ck_hash_table_item_t ***table, int exp)
+{
+	*table = (ck_hash_table_item_t **)
+	          malloc(hashsize(exp) * sizeof(ck_hash_table_item_t *));
+	if (*table == NULL) {
+		ERR_ALLOC_FAILED;
+		return -1;
+	}
+
+	// set to 0
+	memset(*table, 0, hashsize(exp) * sizeof(ck_hash_table_item_t *));
+	
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+/* Public functions                                                           */
+/*----------------------------------------------------------------------------*/
+
+ck_hash_table_t *ck_create_table(uint items)
+{
+	ck_hash_table_t *table =
+			(ck_hash_table_t *)malloc(sizeof(ck_hash_table_t));
+
+	if (table == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	
+	memset(table, 0, sizeof(ck_hash_table_t));
+
+	// determine ideal size of one table in powers of 2 and save the
+	// exponent
+	table->table_size_exp = get_table_exp_and_count(items,
+	                                                &table->table_count);
+	assert(table->table_size_exp <= 32);
+	
+	if (table->table_size_exp == 0) {
+		dbg_ck("Failed to count exponent of the hash table.\n");
+		return NULL;
+	}
+
+	dbg_ck("Creating hash table for %u items.\n", items);
+	dbg_ck("Exponent: %u, number of tables: %u\n ",
+		 table->table_size_exp, table->table_count);
+	dbg_ck("Table size: %u items, each %zu bytes, total %zu bytes\n",
+	         hashsize(table->table_size_exp),
+	         sizeof(ck_hash_table_item_t *),
+	         hashsize(table->table_size_exp)
+	           * sizeof(ck_hash_table_item_t *));
+
+	// create tables
+	for (uint t = 0; t < table->table_count; ++t) {
+		dbg_ck("Creating table %u...\n", t);
+		if (ck_new_table(&table->tables[t], table->table_size_exp) 
+		    != 0) {
+			for (uint i = 0; i < t; ++i) {
+				free(table->tables[i]);
+			}
+			free(table);
+			return NULL;
+		}
+	}
+
+	assert(table->stash == NULL);
+	assert(table->hashed == NULL);
+	assert(table->items == 0);
+	assert(table->items_in_stash == 0);
+	assert(table->table_count == MAX_TABLES
+	       || table->tables[table->table_count] == NULL);
+
+	// initialize rehash/insert mutex
+	pthread_mutex_init(&table->mtx_table, NULL);
+
+	// set the generation to 1 and initialize the universal system
+	CLEAR_FLAGS(&table->generation);
+	SET_GENERATION1(&table->generation);
+
+	us_initialize(&table->hash_system);
+
+	return table;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void ck_destroy_table(ck_hash_table_t **table, void (*dtor_value)(void *value),
+                      int delete_key)
+{
+	assert(table);
+	assert(*table);
+	pthread_mutex_lock(&(*table)->mtx_table);
+
+	// destroy items in tables
+	for (uint i = 0; i < hashsize((*table)->table_size_exp); ++i) {
+		for (uint t = 0; t < (*table)->table_count; ++t) {
+			if ((*table)->tables[t][i] != NULL) {
+				if (dtor_value) {
+					dtor_value(
+					  (*table)->tables[t][i]->value);
+				}
+				if (delete_key != 0) {
+					free(
+					  (void *)(*table)->tables[t][i]->key);
+				}
+				free((void *)(*table)->tables[t][i]);
+			}
+		}
+	}
+
+	// destroy items in stash
+//	ck_hash_table_item_t **stash =
+//	        ((ck_hash_table_item_t **)(da_get_items(&(*table)->stash)));
+//	for (uint i = 0; i < da_get_count(&(*table)->stash); ++i) {
+//		assert(stash[i] != NULL);
+//		if (dtor_value) {
+//			dtor_value(stash[i]->value);
+//		}
+//		if (delete_key != 0) {
+//			free((void *)stash[i]->key);
+//		}
+//		free((void *)stash[i]);
+//	}
+	ck_stash_item_t *item = (*table)->stash;
+	while (item != NULL) {
+		// disconnect the item
+		(*table)->stash = item->next;
+		/*! \todo Investigate this. */
+		assert(item->item != NULL);
+
+		if (dtor_value) {
+			dtor_value(item->item->value);
+		}
+		if (delete_key) {
+			free((void *)item->item->key);
+		}
+
+		free((void *)item->item);
+		free(item);
+		item = (*table)->stash;
+	}
+
+	// deallocate tables
+	for (uint t = 0; t < (*table)->table_count; ++t) {
+		free((*table)->tables[t]);
+	}
+	// destroy stash
+//	da_destroy(&(*table)->stash);
+
+	pthread_mutex_unlock(&(*table)->mtx_table);
+	// destroy mutex, assuming that here noone will lock the mutex again
+	pthread_mutex_destroy(&(*table)->mtx_table);
+
+	free(*table);
+	(*table) = NULL;
+}
+
+void ck_table_free(ck_hash_table_t **table)
+{
+	if (table == NULL || *table == NULL) {
+		return;
+	}
+	
+	pthread_mutex_lock(&(*table)->mtx_table);
+
+	ck_stash_item_t *item = (*table)->stash;
+	while (item != NULL) {
+		// disconnect the item
+		(*table)->stash = item->next;
+		free(item);
+		item = (*table)->stash;
+	}
+
+	// deallocate tables
+	for (uint t = 0; t < (*table)->table_count; ++t) {
+		free((*table)->tables[t]);
+	}
+
+	pthread_mutex_unlock(&(*table)->mtx_table);
+	pthread_mutex_destroy(&(*table)->mtx_table);
+
+	free(*table);
+	(*table) = NULL;
+}
+
+int ck_resize_table(ck_hash_table_t *table)
+{
+	dbg_ck("Resizing hash table.\n");
+	
+	/*
+	 * Easiest is just to increment the exponent, resulting in doubling
+	 * the table sizes. This is not very memory-effective, but should do
+	 * the job.
+	 */
+	
+	if (table->table_size_exp == 31) {
+		dbg_ck("Hash tables achieved max size (exponent 31).\n");
+		return -1;
+	}
+	
+	ck_hash_table_item_t **tables_new[MAX_TABLES];
+	ck_hash_table_item_t **tables_old[MAX_TABLES];
+	int exp_new = table->table_size_exp + 1;
+	
+	dbg_ck("New tables exponent: %d\n", exp_new);
+	
+	for (int t = 0; t < table->table_count; ++t) {
+		if (ck_new_table(&tables_new[t], exp_new) != 0) {
+			dbg_ck("Failed to create new table.\n");
+			for (int i = 0; i < t; ++i) {
+				free(tables_new[i]);
+			}
+			return -1;
+		}
+	}
+	
+	dbg_ck("Created new tables, copying data to them.\n");
+	
+	for (int t = 0; t < table->table_count; ++t) {
+		size_t old_size = hashsize(table->table_size_exp) 
+		                  * sizeof(ck_hash_table_item_t *);
+		
+		// copy the old table items
+		dbg_ck("Copying to: %p, from %p, size: %zu\n",
+		         tables_new[t], table->tables[t], old_size);
+		memcpy(tables_new[t], table->tables[t], old_size);
+		// set the rest to 0
+		dbg_ck("Setting to 0 from %p, size %zu\n",
+		         tables_new[t] + hashsize(table->table_size_exp),
+		         (hashsize(exp_new) * sizeof(ck_hash_table_item_t *))
+		         - old_size);
+		memset(tables_new[t] + hashsize(table->table_size_exp), 0, 
+		       (hashsize(exp_new) * sizeof(ck_hash_table_item_t *))
+		       - old_size);
+	}
+	
+	dbg_ck("Done, switching the tables and running rehash.\n");
+	
+	
+	memcpy(tables_old, table->tables, 
+	       MAX_TABLES * sizeof(ck_hash_table_item_t **));
+	memcpy(table->tables, tables_new, 
+	       MAX_TABLES * sizeof(ck_hash_table_item_t **));
+	
+	table->table_size_exp = exp_new;
+	
+	// delete the old tables
+	for (int t = 0; t < table->table_count; ++t) {
+		free(tables_old[t]);
+	}
+	
+	return ck_rehash(table);
+	//return 0;
+}
+
+int ck_insert_item(ck_hash_table_t *table, const char *key,
+                   size_t length, void *value)
+{
+	// lock mutex to avoid write conflicts
+	pthread_mutex_lock(&table->mtx_table);
+
+	assert(value != NULL);
+
+	dbg_ck_hash("Inserting item with key: %.*s.\n", (int)length, key);
+	dbg_ck_hash_hex(key, length);
+	dbg_ck_hash("\n");
+
+	// create item structure and fill in the given data, key won't be copied
+	ck_hash_table_item_t *new_item =
+	        (ck_hash_table_item_t *)malloc((sizeof(ck_hash_table_item_t)));
+	ck_fill_item(key, length, value, GET_GENERATION(table->generation),
+	             new_item);
+	
+	// check if the table is not full; if yes, resize and rehash!
+	if (ck_is_full(table)) {
+		dbg_ck("Table is full, resize needed.\n");
+		if (ck_resize_table(table) != 0) {
+			dbg_ck("Failed to resize hash table!\n");
+			return -1;
+		}
+	}
+
+	// there should be at least 2 free places
+	//assert(da_try_reserve(&table->stash, 2) == 0);
+	//da_reserve(&table->stash, 1);
+	ck_hash_table_item_t *free_place = NULL;
+	if (ck_hash_item(table, &new_item, &free_place,
+	                 table->generation) != 0) {
+
+		dbg_ck("Adding item with key %.*s to stash.\n",
+		         (int)free_place->key_length, free_place->key);
+
+		// maybe some limit on the stash and rehash if full
+		if (ck_add_to_stash(table, free_place) != 0) {
+			dbg_ck_hash("Could not add item to stash!!\n");
+			assert(0);
+		}
+		
+		if (ck_stash_is_full(table)) {
+			dbg_ck("Stash is full, resize needed.\n");
+			if (ck_resize_table(table) != 0) {
+				dbg_ck("Failed to resize hash table!\n");
+				return -1;
+			}
+		}
+	}
+
+	++table->items;
+	pthread_mutex_unlock(&table->mtx_table);
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const ck_hash_table_item_t *ck_find_item(const ck_hash_table_t *table,
+                                         const char *key, size_t length)
+{
+	dbg_ck("ck_find_item(), key: %.*s, size: %zu\n",
+	         (int)length, key, length);
+
+	ck_hash_table_item_t **found = ck_find_item_nc(table, key, length);
+
+	return (found == NULL) ? NULL : rcu_dereference(*found);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ck_update_item(const ck_hash_table_t *table, const char *key, size_t length,
+                   void *new_value, void (*dtor_value)(void *value))
+{
+	rcu_read_lock();	// is needed?
+
+	assert(new_value != NULL);
+
+	ck_hash_table_item_t **item = ck_find_item_nc(table, key, length);
+
+	if (item == NULL || (*item) == NULL) {
+		return -1;
+	}
+
+	void *old = rcu_xchg_pointer(&(*item)->value, new_value);
+	rcu_read_unlock();
+
+	synchronize_rcu();
+	if (dtor_value) {
+		dtor_value(old);
+	}
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ck_delete_item(const ck_hash_table_t *table, const char *key, size_t length,
+                   void (*dtor_value)(void *value), int delete_key)
+{
+	rcu_read_lock();	// is needed?
+	ck_hash_table_item_t **place = ck_find_item_nc(table, key, length);
+
+	if (place == NULL) {
+		return -1;
+	}
+
+	ck_hash_table_item_t *item = *place;
+
+	assert(item != NULL);
+
+	ck_put_item(place, NULL);
+	rcu_read_unlock();
+
+	synchronize_rcu();
+	if (dtor_value) {
+		dtor_value(item->value);
+	}
+	item->value = NULL;
+	if (delete_key != 0) {
+		free((void *)item->key);
+	}
+	free(item);
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+ck_hash_table_item_t *ck_remove_item(ck_hash_table_t *table, const char *key, 
+                                     size_t length)
+{
+	ck_hash_table_item_t **place = ck_find_item_nc(table, key, length);
+	if (place == NULL) {
+		return NULL;
+	}
+	
+	ck_hash_table_item_t *item = *place;
+	*place = NULL;
+	return item;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ck_shallow_copy(const ck_hash_table_t *from, ck_hash_table_t **to)
+{
+	if (from == NULL || to == NULL) {
+		return -1;
+	}
+
+	*to = (ck_hash_table_t *)malloc(sizeof(ck_hash_table_t));
+
+	if (*to == NULL) {
+		ERR_ALLOC_FAILED;
+		return -2;
+	}
+	memset(*to, 0, sizeof(ck_hash_table_t));
+
+	// copy table count and table size exponent
+	(*to)->table_size_exp = from->table_size_exp;
+	(*to)->table_count = from->table_count;
+	assert((*to)->table_size_exp <= 32);
+
+	dbg_ck("Creating hash table for %u items.\n", from->table_count);
+	dbg_ck("Exponent: %u, number of tables: %u\n ",
+		 (*to)->table_size_exp, (*to)->table_count);
+	dbg_ck("Table size: %u items, each %zu bytes, total %zu bytes\n",
+	         hashsize((*to)->table_size_exp),
+	         sizeof(ck_hash_table_item_t *),
+	         hashsize((*to)->table_size_exp)
+	           * sizeof(ck_hash_table_item_t *));
+
+	// create tables
+	for (uint t = 0; t < (*to)->table_count; ++t) {
+		dbg_ck("Creating table %u...\n", t);
+		(*to)->tables[t] = (ck_hash_table_item_t **)malloc(
+		                        hashsize((*to)->table_size_exp)
+		                        * sizeof(ck_hash_table_item_t *));
+		if ((*to)->tables[t] == NULL) {
+			ERR_ALLOC_FAILED;
+			for (uint i = 0; i < t; ++i) {
+				free((*to)->tables[i]);
+			}
+			free(*to);
+			return -2;
+		}
+
+		// copy the table
+		memcpy((*to)->tables[t], from->tables[t],
+		       hashsize((*to)->table_size_exp)
+		           * sizeof(ck_hash_table_item_t *));
+	}
+
+	// copy the stash - we must explicitly copy each stash item, but do not
+	// copy the ck_hash_table_item_t within them.
+	ck_stash_item_t *si = from->stash;
+	ck_stash_item_t **pos = &(*to)->stash;
+	dbg_ck_verb(stderr, "Copying hash table stash.\n");
+	while (si != NULL) {
+		ck_stash_item_t *si_new = (ck_stash_item_t *)
+		                           malloc(sizeof(ck_stash_item_t));
+		if (si_new == NULL) {
+			ERR_ALLOC_FAILED;
+			// delete tables
+			for (uint i = 0; i < (*to)->table_count; ++i) {
+				free((*to)->tables[i]);
+			}
+			// delete created stash items
+			si_new = (*to)->stash;
+			while (si_new != NULL) {
+				ck_stash_item_t *prev = si_new;
+				si_new = si_new->next;
+				free(prev);
+			}
+			free(*to);
+			return -2;
+		}
+
+		dbg_ck("Copying stash item: %p with item %p, ", si, si->item);
+		dbg_ck("key: %.*s\n", (int)si->item->key_length, si->item->key);
+
+		si_new->item = si->item;
+		*pos = si_new;
+		pos = &si_new->next;
+		si = si->next;
+
+
+		dbg_ck("Old stash item: %p with item %p, ", si,
+		       ((si == NULL) ? NULL : si->item));
+		if (si != NULL) {
+			dbg_ck("key: %.*s\n", (int)si->item->key_length, si->item->key);
+		} else {
+			dbg_ck("\n");
+		}
+		dbg_ck("New stash item: %p with item %p, ", si_new,
+		       si_new->item);
+		dbg_ck("key: %.*s\n", (int)si_new->item->key_length, 
+		       si_new->item->key);
+	}
+	
+	*pos = NULL;
+	
+	// there should be no item being hashed right now
+	/*! \todo This operation should not be done while inserting / rehashing. 
+	 */
+	assert(from->hashed == NULL);
+	(*to)->hashed = NULL;
+	
+	// initialize rehash/insert mutex
+	pthread_mutex_init(&(*to)->mtx_table, NULL);
+
+	// copy the generation
+	(*to)->generation = from->generation;
+	
+	// copy the hash functions
+	memcpy(&(*to)->hash_system, &from->hash_system, sizeof(us_system_t));
+	
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ck_apply(ck_hash_table_t *table, 
+             void (*function)(ck_hash_table_item_t *item, void *data), 
+             void *data)
+{
+	if (table == NULL || function == NULL) {
+		return -1;
+	}
+	
+	/*! \todo Ensure that no insertion nor rehash is made during applying.*/
+	
+	// apply the function to all items in all tables
+	for (int t = 0; t < table->table_count; ++t) {
+		for (int i = 0; i < hashsize(table->table_size_exp); ++i) {
+			function(table->tables[t][i], data);
+		}
+	}
+	
+	// apply the function to the stash items
+	ck_stash_item_t *si = table->stash;
+	while (si != NULL) {
+		function(si->item, data);
+		si = si->next;
+	}
+	
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ck_rehash(ck_hash_table_t *table)
+{
+	dbg_ck_hash("Rehashing items in table.\n");
+	SET_REHASHING_ON(&table->generation);
+
+	ck_stash_item_t *free_stash_items = NULL;
+
+	do {
+		// 1) Rehash items from stash
+		dbg_ck_rehash("Rehashing items from stash.\n");
+		ck_stash_item_t *item = table->stash;
+		ck_stash_item_t **item_place = &table->stash;
+		// terminate when at the end; this way the newly added items
+		// (added to the beginning) will be properly ignored
+		while (item != NULL) {
+			dbg_ck_rehash("Rehashing item with "
+			  "key (length %zu): %.*s, generation: %hu, "
+			  "table generation: %hu.\n", item->item->key_length,
+			  (int)item->item->key_length, item->item->key,
+			  GET_GENERATION(
+				item->item->timestamp),
+			  GET_GENERATION(table->generation));
+
+			// put the hashed item to the prepared space
+			table->hashed = item->item;
+			item->item = NULL;
+			// we may use the place in the stash item as the free
+			// place for rehashing
+			if (ck_hash_item(table, &table->hashed, &item->item,
+			             NEXT_GENERATION(table->generation)) != 0) {
+				// the free place was used
+				assert(item->item != NULL);
+				// we may leave the item there (in the stash)
+				assert(EQUAL_GENERATIONS(item->item->timestamp,
+				           NEXT_GENERATION(table->generation)));
+				//assert(item->item == table->hashed);
+
+				item_place = &item->next;
+				item = item->next;
+			} else {
+				// the free place should be free
+				assert(item->item == NULL);
+				// and the item should be hashed too
+//				assert(table->hashed == NULL);
+
+				// fix the pointer from the previous hash item
+				*item_place = item->next;
+				// and do not change the item place pointer
+
+				// put the stash item into list of free stash
+				// items
+				item->next = free_stash_items;
+				free_stash_items = item;
+
+				item = *item_place;
+			}
+		}
+
+		// 2) Rehash items from tables
+
+		// in case of failure, save the item in a temp variable
+		// which will be put to the stash
+		ck_hash_table_item_t *free = NULL;
+		assert(table->hashed == NULL);
+//		ck_hash_table_item_t *old = table->hashed;
+
+		for (uint t = 0; t < table->table_count; ++t) {
+			uint rehashed = 0;
+
+			dbg_ck_rehash("Rehashing table %d.\n", t);
+
+			while (rehashed < hashsize(table->table_size_exp)) {
+
+				// if item's generation is the new generation,
+				// skip
+				if (table->tables[t][rehashed] == NULL
+				    || !(EQUAL_GENERATIONS(
+				          table->tables[t][rehashed]->timestamp,
+				          table->generation))) {
+					dbg_ck_rehash("Skipping item.\n");
+					++rehashed;
+					continue;
+				}
+
+				dbg_ck_rehash("Rehashing item with hash %u, "
+				  "key (length %zu): %.*s, generation: %hu, "
+				  "table generation: %hu.\n", rehashed,
+				  table->tables[t][rehashed]->key_length,
+				  (int)(table->tables[t][rehashed]->key_length),
+				  table->tables[t][rehashed]->key,
+				  GET_GENERATION(
+					table->tables[t][rehashed]->timestamp),
+				  GET_GENERATION(table->generation));
+
+				// otherwise copy the item for rehashing
+				ck_put_item(&table->hashed, table->tables[t][rehashed]);
+				// clear the place so that this item will not
+				// get rehashed again
+				ck_clear_item(&table->tables[t][rehashed]);
+
+				dbg_ck_rehash("Table generation: %hu, next "
+				            "generation: %hu.\n",
+				            GET_GENERATION(table->generation),
+				            NEXT_GENERATION(table->generation));
+
+				if (ck_hash_item(table, &table->hashed, &free,
+				     NEXT_GENERATION(table->generation)) != 0) {
+					// loop occured
+					dbg_ck_hash("Hashing entered a loop."
+						      "\n");
+					dbg_ck_rehash("Item with key %.*s "
+					  "inserted into the free slot.\n",
+					  free->key_length, free->key);
+
+					//assert(old == free);
+
+					// put the item into the stash, but
+					// try the free stash items first
+					if (free_stash_items != NULL) {
+						// take first
+						ck_stash_item_t *item =
+							free_stash_items;
+						free_stash_items = item->next;
+
+						item->item = free;
+						item->next = table->stash;
+						table->stash = item;
+					} else {
+						if (ck_add_to_stash(table, free)
+						    != 0) {
+							ck_rollback_rehash(
+								table);
+						}
+					}
+
+					free = NULL;
+					table->hashed = NULL;
+				}
+				++rehashed;
+			}
+		}
+
+		dbg_ck_rehash("Old table generation: %u\n",
+		                GET_GENERATION(table->generation));
+		// rehashing completed, switch generation of the table
+		SET_NEXT_GENERATION(&table->generation);
+		dbg_ck_rehash("New table generation: %u\n",
+		                GET_GENERATION(table->generation));
+		// generate new hash functions for the old generation
+		dbg_ck_rehash("Generating coeficients for generation: %u\n",
+		                NEXT_GENERATION(table->generation));
+		us_next(&table->hash_system,
+		        NEXT_GENERATION(table->generation));
+
+	} while (false /*! \todo Add proper condition!! */);
+
+	SET_REHASHING_OFF(&table->generation);
+
+	assert(table->hashed == NULL);
+
+
+	while (free_stash_items != NULL) {
+		ck_stash_item_t *item = free_stash_items;
+		free_stash_items = item->next;
+		assert(item->item == NULL);
+		free(item);
+	}
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Rehashes the whole table.
+ *
+ * \param table Hash table to be rehashed.
+ *
+ * \note While rehashing no item should be inserted as it will result in a
+ *       deadlock.
+ *
+ * \retval 0 No error.
+ * \retval -1 Rehashing failed. Some items may have been already moved and the
+ *            rehashing flag remains set.
+ *
+ * \todo What if the stash is reallocated during ck_hash_item()? We'd be using
+ *       the old stash for saving items! The old stash would not get deallocated
+ *       (due to RCU - maybe put some rcu_read_lock() here), but the item
+ *       would not be saved into the new stash!
+ *       Maybe add a function for getting a pointer to particular item from
+ *       the dynamic array and protect it using rcu_read_lock().
+ *       Other option: Do not use pointer to an item in stash in the call to
+ *       ck_hash_item(). Use some new place & put the item to the stash
+ *       afterwards, protecting it using rcu_read_lock() and rcu_assign_pointer.
+ */
+//int ck_rehash(ck_hash_table_t *table)
+//{
+//	dbg_ck_rehash("Rehashing items in table.\n");
+//	SET_REHASHING_ON(&table->generation);
+
+//	// we already have functions for the next generation, begin rehashing
+//	// we wil use the last item in the buffer as free cell for hashing
+//	assert(da_try_reserve(&table->stash, 1) == 0);
+//	ck_hash_table_item_t *old = (ck_hash_table_item_t *)
+//	                          (malloc(sizeof(ck_hash_table_item_t)));
+
+//	do {
+//		dbg_ck_hash("Rehash!\n");
+
+//		if (da_get_count(&table->stash) > STASH_SIZE) {
+//			dbg_ck_hash("STASH RESIZED!!! (new stash size: %d)\n",
+//			              da_get_count(&table->stash));
+//		}
+
+//		// rehash items from stash, starting from the last old item
+//		int stash_i = da_get_count(&table->stash) - 1;
+//		while (stash_i >= 0) {
+//			// if item's generation is the new generation, skip
+//			if (STASH_ITEMS(&table->stash)[stash_i] == NULL
+//			    || !(EQUAL_GENERATIONS(STASH_ITEMS(&table->stash)
+//			                            [stash_i]->timestamp,
+//			                            table->generation))) {
+//				dbg_ck_rehash("Skipping item.\n");
+//				--stash_i;
+//				continue;
+//			}
+
+//			dbg_ck_rehash("Rehashing item from buffer position %u"
+//			                ", key (length %u): %.*s, generation: "
+//			                "%hu, table generation: %hu.\n",
+//			   stash_i,
+//			   STASH_ITEMS(&table->stash)[stash_i]->key_length,
+//			   (int)STASH_ITEMS(&table->stash)[stash_i]->key_length,
+//			   STASH_ITEMS(&table->stash)[stash_i]->key,
+//			   GET_GENERATION(
+//				STASH_ITEMS(&table->stash)[stash_i]->timestamp),
+//			   GET_GENERATION(table->generation));
+
+//			// otherwise copy the item for rehashing
+//			ck_put_item(&old, STASH_ITEMS(&table->stash)[stash_i]);
+//			// clear the place so that this item will not get
+//			// rehashed again
+//			ck_clear_item(&STASH_ITEMS(&table->stash)[stash_i]);
+//			da_release(&table->stash, 1);
+
+//			// there should be at least one place in the stash
+//			assert(da_try_reserve(&table->stash, 1) == 0);
+//			da_reserve(&table->stash, 1);
+
+//			assert(STASH_ITEMS(&table->stash)[stash_i] == NULL);
+
+//			// and start rehashing
+//			if (ck_hash_item(table, &old,
+//			             &STASH_ITEMS(&table->stash)[stash_i],
+//			             NEXT_GENERATION(table->generation)) != 0) {
+//				// loop occured
+//				dbg_ck_hash("Hashing entered a loop.\n");
+
+//				dbg_ck_rehash("Item with key %.*s inserted "
+//					"into the stash on position %d.\n",
+//					STASH_ITEMS(&table->stash)
+//						[stash_i]->key_length,
+//					STASH_ITEMS(&table->stash)
+//						[stash_i]->key,
+//					da_get_count(&table->stash));
+
+//				// hashing unsuccessful, the item was inserted
+//				// into the stash
+//				da_occupy(&table->stash, 1);
+//				assert(STASH_ITEMS(&table->stash)[stash_i]
+//				       != NULL);
+
+//				// if only one place left, resize the stash
+//				// TODO: Why???
+//				if (da_reserve(&table->stash, 2) < 0) {
+//					// stash could not be resized => !!!
+//					dbg_ck_hash("Failed to rehash items "
+//					              "from "
+//					  "table, no other rehash possible!\n");
+//					// so rollback
+//					ck_rollback_rehash(table);
+//					// clear the 'old' item
+//					ck_clear_item(&old);
+//					return -1;
+//				}
+//			}
+
+//			// clear the 'old' item
+//			ck_clear_item(&old);
+//			// decrement the index
+//			--stash_i;
+//		}
+
+//		uint i = 0;
+//		while (i < da_get_count(&table->stash)) {
+//			assert(STASH_ITEMS(&table->stash)[i] != NULL);
+//			++i;
+//		}
+//		dbg_ck_hash("OK\n");
+//		assert(da_try_reserve(&table->stash, 1) == 0);
+//		assert(STASH_ITEMS(&table->stash)[da_get_count(&table->stash)]
+//		       == NULL);
+
+//		// rehash items from hash tables
+//		for (uint t = TABLE_FIRST;
+//		     t <= TABLE_LAST(table->table_count); ++t) {
+//			dbg_ck_rehash("Rehashing items from table %d.\n",
+//			                t + 1);
+//			uint rehashed = 0;
+
+//			while (rehashed < hashsize(table->table_size_exp)) {
+
+//				// if item's generation is the new generation,
+//				// skip
+//				if (table->tables[t][rehashed] == NULL
+//				    || !(EQUAL_GENERATIONS(
+//				          table->tables[t][rehashed]->timestamp,
+//				          table->generation))) {
+//					dbg_ck_rehash("Skipping item.\n");
+//					++rehashed;
+//					continue;
+//				}
+
+//				dbg_ck_rehash("Rehashing item with hash %u, "
+//				  "key (length %u): %.*s, generation: %hu, "
+//				  "table generation: %hu.\n", rehashed,
+//				  table->tables[t][rehashed]->key_length,
+//				  (int)(table->tables[t][rehashed]->key_length),
+//				  table->tables[t][rehashed]->key,
+//				  GET_GENERATION(
+//					table->tables[t][rehashed]->timestamp),
+//				  GET_GENERATION(table->generation));
+
+//				// otherwise copy the item for rehashing
+//				ck_put_item(&old, table->tables[t][rehashed]);
+//				// clear the place so that this item will not
+//				// get rehashed again
+//				ck_clear_item(&table->tables[t][rehashed]);
+
+//				dbg_ck_rehash("Table generation: %hu, next "
+//				            "generation: %hu.\n",
+//				            GET_GENERATION(table->generation),
+//				            NEXT_GENERATION(table->generation));
+
+//				// and start rehashing
+//				assert(&old != &STASH_ITEMS(&table->stash)[
+//				               da_get_count(&table->stash)]);
+//				assert(da_try_reserve(&table->stash, 1) == 0);
+//				da_reserve(&table->stash, 1);
+
+//				if (ck_hash_item(table, &old,
+//				     &STASH_ITEMS(&table->stash)[
+//				       da_get_count(&table->stash)],
+//				     NEXT_GENERATION(table->generation)) != 0) {
+//					// loop occured
+//					dbg_ck_hash("Hashing entered a loop."
+//						      "\n");
+//					dbg_ck_rehash("Item with key %.*s "
+//					  "inserted into the stash on position "
+//					  "%d.\n", STASH_ITEMS(&table->stash)[
+//					      da_get_count(&table->stash)]
+//					         ->key_length,
+//					  STASH_ITEMS(&table->stash)[
+//					      da_get_count(&table->stash)]->key,
+//					  da_get_count(&table->stash));
+
+//					assert(STASH_ITEMS(&table->stash)[
+//					  da_get_count(&table->stash)] != NULL);
+//					// loop occured, the item is already at
+//					// its new place in the buffer, so just
+//					// increment the index
+//					da_occupy(&table->stash, 1);
+
+//					// if only one place left, resize the
+//					// stash TODO: Why?
+//					if (da_reserve(&table->stash, 2) < 0) {
+//						// stash could not be resized
+//						dbg_ck_hash("Failed to rehash"
+//						  " items from table, no other "
+//						  "rehash possible!\n");
+//						// so rollback
+//						ck_rollback_rehash(table);
+//						// clear the 'old' item
+//						ck_clear_item(&old);
+//						return -1;
+//					}
+//				}
+//				++rehashed;
+//			}
+//		}
+
+//		dbg_ck_rehash("Old table generation: %u\n",
+//		                GET_GENERATION(table->generation));
+//		// rehashing completed, switch generation of the table
+//		SET_NEXT_GENERATION(&table->generation);
+//		dbg_ck_rehash("New table generation: %u\n",
+//		                GET_GENERATION(table->generation));
+//		// generate new hash functions for the old generation
+//		dbg_ck_rehash("Generating coeficients for generation: %u\n",
+//		                NEXT_GENERATION(table->generation));
+//		us_next(NEXT_GENERATION(table->generation));
+
+//		// repeat rehashing while there are more items in the stash than
+//		// its initial size
+//		if (da_get_count(&table->stash) > STASH_SIZE) {
+//			dbg_ck_rehash("Rehashing again!\n");
+//		}
+//	} while (da_get_count(&table->stash) > STASH_SIZE);
+
+//	SET_REHASHING_OFF(&table->generation);
+
+//	return 0;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+void ck_dump_table(const ck_hash_table_t *table)
+{
+#ifdef CUCKOO_DEBUG
+	uint i = 0;
+	dbg_ck("----------------------------------------------\n");
+	dbg_ck("Hash table dump:\n\n");
+	dbg_ck("Size of each table: %u\n\n", hashsize(table->table_size_exp));
+
+	for (uint t = 0; t < table->table_count; ++t) {
+		dbg_ck("Table %d:\n", t + 1);
+
+		for (i = 0; i < hashsize(table->table_size_exp); i++) {
+			dbg_ck("Hash: %u, Key: %.*s, Value: %p.\n", i,
+			         (int)(table->tables[t])[i]->key_length,
+			         (table->tables[t])[i]->key,
+			         (table->tables[t])[i]->value);
+		}
+	}
+
+	dbg_ck("Stash:\n");
+//	for (i = 0; i < da_get_count(&table->stash); ++i) {
+//		dbg_ck("Index: %u, Key: %.*s Value: %p.\n", i,
+//		         ((ck_hash_table_item_t **)
+//		             da_get_items(&table->stash))[i]->key_length,
+//		         ((ck_hash_table_item_t **)
+//		             da_get_items(&table->stash))[i]->key,
+//		         ((ck_hash_table_item_t **)
+//		             da_get_items(&table->stash))[i]->value);
+//	}
+	ck_stash_item_t *item = table->stash;
+	while (item != NULL) {
+		dbg_ck("Hash: %u, Key: %.*s, Value: %p.\n", i,
+			 (int)item->item->key_length, item->item->key,
+			 item->item->value);
+		item = item->next;
+	}
+
+	dbg_ck("\n");
+#endif
+}
diff --git a/src/libknot/hash/cuckoo-hash-table.h b/src/libknot/hash/cuckoo-hash-table.h
new file mode 100644
index 0000000..dd78294
--- /dev/null
+++ b/src/libknot/hash/cuckoo-hash-table.h
@@ -0,0 +1,333 @@
+/*!
+ * \file cuckoo-hash-table.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Implementation of Cuckoo hashing scheme.
+ *
+ * Uses d-ary Cuckoo hashing with stash.
+ *
+ * \todo Maybe provide some way to resize the whole table if the number of items
+ *       grows too much.
+ * \todo Check size of integers, the table size may be larger than unsigned int.
+ * \todo Maybe do not return ck_hash_table_item from ck_find_item(), but only
+ *       its value.
+ * \todo When hashing an item, only the first table is tried for this item.
+ *       We may try all tables. (But it is not neccessary.)
+ *
+ * \addtogroup hashing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_CUCKOO_HASH_TABLE_H_
+#define _KNOT_CUCKOO_HASH_TABLE_H_
+
+#include <stdint.h> /* uint32_t */
+#include <stdlib.h> /* size_t */
+#include <pthread.h>
+
+#include "hash/universal-system.h"
+#include "common/dynamic-array.h"
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Macro for getting one hash table size. */
+#define hashsize(n) ((uint32_t)1 << (n))
+
+/*!
+ * \brief Max number of hash tables - must be the same as number of the hash
+ *        functions in each generation of the universal system.
+ */
+#define MAX_TABLES US_FNC_COUNT
+
+/*! \brief Default stash size. */
+static const uint STASH_SIZE = 10;
+
+/*! \brief Maximum stash size. When achieved, rehashing is needed. */
+static const uint STASH_SIZE_MAX = 30;
+
+/*----------------------------------------------------------------------------*/
+/* Public structures                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure for storing the hashed data.
+ */
+struct ck_hash_table_item {
+	const char *key; /*!< Key of the item, used for hashing. */
+
+	size_t key_length; /*!< Length of the key in octets. */
+
+	void *value; /*!< The actual item stored in the table. */
+
+	/*!
+	 * \brief Flags. Currently used for keeping the generation of the item,
+	 *        i.e. the generation of the functions used for hashing this
+	 *        item.
+	 *
+	 * Form: 000000xy;
+	 * xy - generation; may be 01 (1) or 10 (2).
+	 */
+	uint8_t timestamp;
+};
+
+typedef struct ck_hash_table_item ck_hash_table_item_t;
+
+struct ck_stash_item {
+	ck_hash_table_item_t *item;
+	struct ck_stash_item *next;
+};
+
+typedef struct ck_stash_item ck_stash_item_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Hash table structure which uses cuckoo hashing.
+ *
+ * Keys are expected to be strings of characters (char *), not necesarily
+ * null-terminated. It uses the Fowler/Noll/Vo (FNV) hash function to
+ * obtain a 32bit unsigned integer from the character data and a function
+ * randomly chosen from an universal system (see universal-system.h) to obtain
+ * the final hash. The FNV hash was taken from
+ * http://home.comcast.net/~bretm/hash/6.html and the universal system is
+ * constructed according to Katajainen J., Lykke M., Experiments with universal
+ * hashing (obtained from
+ * http://www.diku.dk/OLD/publikationer/tekniske.rapporter/rapporter/96-08.pdf).
+ *
+ * The table uses either 3-ary or 4-ary cuckoo hashing (and thus 3 or 4 tables)
+ * with stash, according to the number of items provided to ck_create_table()
+ * function. The number of table pointers is however set to be the larger value
+ * (4) always, so the \a tables array may be statically allocated. Size of one
+ * table is always a power of 2 (due to the character of the hash function).
+ * The stash has a default size STASH_SIZE, but can be resized if needed.
+ * However, the resizing is only done in rehashing process, if the items do not
+ * fit into the table and the original stash.
+ *
+ * Rehashing is done when the stash gets full (actually, last item is always
+ * free and is used in the rehashing process as a temporary variable).
+ */
+struct ck_hash_table {
+	uint table_count; /*!< Actual number of hash tables used. */
+
+	/*!
+	 * \brief Exponent of one table's size (2^table_size_exp is table size).
+	 */
+	int table_size_exp;
+
+	ck_hash_table_item_t **tables[MAX_TABLES]; /*!< Array of hash tables. */
+
+	//da_array_t stash; /*!< Stash implemented as a dynamic array. */
+	ck_stash_item_t *stash;
+
+	/*! \brief Temporary storage for item being hashed. */
+	ck_hash_table_item_t *hashed;
+
+	/*! \brief Mutex for avoiding multiple insertions / rehashes at once. */
+	pthread_mutex_t mtx_table;
+
+	/*!
+	 * \brief Flags used for determining which hash functions are currently
+	 *        used
+	 *
+	 * Form: 00000xyz.
+	 * x - rehash flag (1 if rehashing is in progress)
+	 * yz - generation (may be 10 = 2, or 01 = 1)
+	 *
+	 * There are always two sets of hash functions available via the
+	 * us_hash() function (see universal-hashing.h). Normally all items in
+	 * the table are hashed using one set of functions. However, during
+	 * rehash, the other set is used for rehashing. In this case the rehash
+	 * flag (x) is set, so the lookup function (ck_find_item()) tries to use
+	 * both sets of functions when searching for item.
+	 */
+	uint8_t generation;
+
+	us_system_t hash_system; /*!< Universal system of hash functions. */
+	
+	size_t items;
+	size_t items_in_stash;
+};
+
+typedef struct ck_hash_table ck_hash_table_t;
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates and initializes the hash table structure.
+ *
+ * All hash tables are allocated and their items initialized to 0 (NULL).
+ * A stash of default size is also created. The \a generation flags are set to
+ * 0.
+ *
+ * \param items Number of items to be hashed to the table. This number
+ *              determines the size of the hash table that will be created.
+ *
+ *
+ * \return Pointer to the initialized hash table.
+ */
+ck_hash_table_t *ck_create_table(uint items);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Destroys the whole hash table together with the saved values.
+ *
+ * \param table Pointer to pointer to the hash table.
+ * \param dtor_value Destructor function for the values that are be stored in
+ *                   the hash table. Set to NULL if you do not want the values
+ *                   to be deleted.
+ * \param delete_key Set to 0 if you do not want the function to delete the
+ *                   key of the item (e.g. when used elsewhere). Set to any
+ *                   other value otherwise.
+ *
+ * \note Make sure the table and its items are not used anymore when calling
+ * this function.
+ */
+void ck_destroy_table(ck_hash_table_t **table,
+                      void (*dtor_value)(void *value), int delete_key);
+
+/*!
+ * \brief Destroys the table structures, but does not remove the individual
+ *        hash table items.
+ */
+void ck_table_free(ck_hash_table_t **table);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Inserts item into the hash table.
+ *
+ * Insertion starts always by trying to hash the item into the first table. The
+ * possible displaced item is then hashed into randomly chosen other table,
+ * etc., until a free place is found or a loop occured. A loop occurs when one
+ * position in one table is tried more than twice.
+ *
+ * \param table Hash table the item should be inserted into.
+ * \param key Item's key. It can be any string of octets. The key is not copied
+ *            by the function.
+ * \param length Length of the key in bytes (octets).
+ * \param value Pointer to the actual item to be inserted into the hash table.
+ *
+ * \note This function does not copy the key.
+ * \note This function may trigger rehash of the whole table in case the stash
+ *       gets full.
+ *
+ * \retval 0 No error.
+ * \retval -1 Insertion failed. This may occur only when the rehashing fails.
+ *            In this case it is necessary to somehow manually force another
+ *            rehash as no other rehash would be possible.
+ */
+int ck_insert_item(ck_hash_table_t *table, const char *key, size_t length,
+                   void *value);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Finds item in table.
+ *
+ * \param table Hash table to search in.
+ * \param key Key of the item. It can be an arbitrary string of octets.
+ * \param length Length of the key in bytes (octets).
+ *
+ * \return Pointer to the item if found. NULL otherwise.
+ */
+const ck_hash_table_item_t *ck_find_item(const ck_hash_table_t *table,
+                                         const char *key, size_t length);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Updates item with the given key by replacing its value.
+ *
+ * The update process is synchronized using RCU mechanism, so the old item's
+ * value will not be deleted while some thread is using it.
+ *
+ * \param table Hash table where to search for the item.
+ * \param key Key of the item to be updated. It can be an arbitrary string of
+ *            octets.
+ * \param length Length of the key in bytes (octets).
+ * \param new_value New value for the item with key \a key.
+ * \param dtor_value Destructor function for the values that are be stored in
+ *                   the hash table. Set to NULL if you do not want the values
+ *                   to be deleted.
+ *
+ * \retval 0 If successful.
+ * \retval -1 If the item was not found in the table. No changes are made.
+ */
+int ck_update_item(const ck_hash_table_t *table, const char *key, size_t length,
+                   void *new_value, void (*dtor_value)(void *value));
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Removes item with the given key from table.
+ *
+ * The deletion process is synchronized using RCU mechanism, so the old item
+ * will not be deleted while some thread is using it.
+ *
+ * \param table Hash table where to search for the item.
+ * \param key Key of the item to be removed. It can be an arbitrary string of
+ *            octets.
+ * \param length Length of the key in bytes (octets).
+ * \param dtor_value Destructor function for the values that are be stored in
+ *                   the hash table. Set to NULL if you do not want the values
+ *                   to be deleted.
+ * \param delete_key Set to 0 if you do not want the function to delete the
+ *                   key of the item (e.g. when used elsewhere). Set to any
+ *                   other value otherwise.
+ *
+ * \retval 0 If successful.
+ * \retval -1 If the item was not found in the table.
+ */
+int ck_delete_item(const ck_hash_table_t *table, const char *key, size_t length,
+                   void (*dtor_value)(void *value), int delete_key);
+
+ck_hash_table_item_t *ck_remove_item(ck_hash_table_t *table, const char *key, 
+                                     size_t length);
+
+/*!
+ * \brief Creates a shallow copy of the cuckoo hash table.
+ *
+ * This function creates just the ck_hash_table_t structure and its tables and
+ * stash. It does not copy individual ck_hash_table_item_t structures.
+ *
+ * \param from Table to copy.
+ * \param to The new copy will be stored here.
+ *
+ * \retval 0 if successful.
+ * \retval
+ */
+int ck_shallow_copy(const ck_hash_table_t *from, ck_hash_table_t **to);
+
+int ck_apply(ck_hash_table_t *table, 
+             void (*function)(ck_hash_table_item_t *item, void *data), 
+             void *data);
+
+/*----------------------------------------------------------------------------*/
+
+int ck_rehash(ck_hash_table_t *table);
+
+// for testing purposes only
+int ck_resize_table(ck_hash_table_t *table);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Dumps the whole hash table to the standard output.
+ */
+void ck_dump_table(const ck_hash_table_t *table);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* _KNOT_CUCKOO_HASH_TABLE_H_ */
+
+/*! @} */
diff --git a/src/libknot/hash/hash-functions.c b/src/libknot/hash/hash-functions.c
new file mode 100644
index 0000000..a33dd6b
--- /dev/null
+++ b/src/libknot/hash/hash-functions.c
@@ -0,0 +1,241 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "hash-functions.h"
+
+/*--------------------------------- FNV HASH ---------------------------------*/
+
+unsigned long int fnv_hash(const char *data, int size, int bits)
+{
+	int shift, i;
+	unsigned long int mask;
+	unsigned long int hash = 2166136261;
+
+	if (bits == -1) {
+		shift = 0;
+		mask = 0xFFFFFFFF;
+	} else {
+		shift = 32 - bits;
+		mask = (1U << shift) - 1U;
+	}
+
+	for (i = 0; i < size; i++) {
+		hash = (hash * 16777619) ^ data[i];
+	}
+
+	if (shift == 0) {
+		return hash;
+	}
+
+	return (hash ^(hash >> shift)) & mask;
+}
+
+/*------------------------------- JENKINS HASH -------------------------------*/
+
+/* The mixing step */
+/*
+#define mix(a,b,c) \
+	{ \
+		a=a-b;  a=a-c;  a=a^(c>>13); \
+		b=b-c;  b=b-a;  b=b^(a<<8);  \
+		c=c-a;  c=c-b;  c=c^(b>>13); \
+		a=a-b;  a=a-c;  a=a^(c>>12); \
+		b=b-c;  b=b-a;  b=b^(a<<16); \
+		c=c-a;  c=c-b;  c=c^(b>>5);  \
+		a=a-b;  a=a-c;  a=a^(c>>3);  \
+		b=b-c;  b=b-a;  b=b^(a<<10); \
+		c=c-a;  c=c-b;  c=c^(b>>15); \
+	}
+*/
+
+///* The whole new hash function */
+//u4 jhash(register u1 *k, u4 length, u4 initval)
+//{
+//	register u4 a, b, c; /* the internal state */
+//	u4 len;    /* how many key bytes still need mixing */
+
+//	/* Set up the internal state */
+//	len = length;
+//	a = b = 0x9e3779b9;  /* the golden ratio; an arbitrary value */
+//	c = initval;         /* variable initialization of internal state */
+
+//	/*---------------------------------------- handle most of the key */
+//	while (len >= 12) {
+//		a = a + (k[0] + ((u4)k[1] << 8)
+//		      + ((u4)k[2] << 16) + ((u4)k[3] << 24));
+//		b = b + (k[4] + ((u4)k[5] << 8)
+//		      + ((u4)k[6] << 16) + ((u4)k[7] << 24));
+//		c = c + (k[8] + ((u4)k[9] << 8)
+//		      + ((u4)k[10] << 16) + ((u4)k[11] << 24));
+//		mix(a, b, c);
+//		k = k + 12;
+//		len = len - 12;
+//	}
+
+//	/*------------------------------------- handle the last 11 bytes */
+//	c = c + length;
+//	switch (len) {           /* all the case statements fall through */
+//	case 11:
+//		c = c + ((u4)k[10] << 24);
+//	case 10:
+//		c = c + ((u4)k[9] << 16);
+//	case 9 :
+//		c = c + ((u4)k[8] << 8);
+//		/* the first byte of c is reserved for the length */
+//	case 8 :
+//		b = b + ((u4)k[7] << 24);
+//	case 7 :
+//		b = b + ((u4)k[6] << 16);
+//	case 6 :
+//		b = b + ((u4)k[5] << 8);
+//	case 5 :
+//		b = b + k[4];
+//	case 4 :
+//		a = a + ((u4)k[3] << 24);
+//	case 3 :
+//		a = a + ((u4)k[2] << 16);
+//	case 2 :
+//		a = a + ((u4)k[1] << 8);
+//	case 1 :
+//		a = a + k[0];
+//		/* case 0: nothing left to add */
+//	}
+//	mix(a, b, c);
+//	/*-------------------------------------------- report the result */
+//	return c;
+//}
+
+
+
+#define hashsize(n) ((ub4)1<<(n))
+#define hashmask(n) (hashsize(n)-1)
+
+/*
+--------------------------------------------------------------------
+mix -- mix 3 32-bit values reversibly.
+For every delta with one or two bits set, and the deltas of all three
+  high bits or all three low bits, whether the original value of a,b,c
+  is almost all zero or is uniformly distributed,
+* If mix() is run forward or backward, at least 32 bits in a,b,c
+  have at least 1/4 probability of changing.
+* If mix() is run forward, every bit of c will change between 1/3 and
+  2/3 of the time.  (Well, 22/100 and 78/100 for some 2-bit deltas.)
+mix() was built out of 36 single-cycle latency instructions in a 
+  structure that could supported 2x parallelism, like so:
+      a -= b; 
+      a -= c; x = (c>>13);
+      b -= c; a ^= x;
+      b -= a; x = (a<<8);
+      c -= a; b ^= x;
+      c -= b; x = (b>>13);
+      ...
+  Unfortunately, superscalar Pentiums and Sparcs can't take advantage 
+  of that parallelism.  They've also turned some of those single-cycle
+  latency instructions into multi-cycle latency instructions.  Still,
+  this is the fastest good hash I could find.  There were about 2^^68
+  to choose from.  I only looked at a billion or so.
+--------------------------------------------------------------------
+*/
+#define mix(a,b,c) \
+{ \
+  a -= b; a -= c; a ^= (c>>13); \
+  b -= c; b -= a; b ^= (a<<8); \
+  c -= a; c -= b; c ^= (b>>13); \
+  a -= b; a -= c; a ^= (c>>12);  \
+  b -= c; b -= a; b ^= (a<<16); \
+  c -= a; c -= b; c ^= (b>>5); \
+  a -= b; a -= c; a ^= (c>>3);  \
+  b -= c; b -= a; b ^= (a<<10); \
+  c -= a; c -= b; c ^= (b>>15); \
+}
+
+/*
+--------------------------------------------------------------------
+hash() -- hash a variable-length key into a 32-bit value
+  k       : the key (the unaligned variable-length array of bytes)
+  len     : the length of the key, counting by bytes
+  initval : can be any 4-byte value
+Returns a 32-bit value.  Every bit of the key affects every bit of
+the return value.  Every 1-bit and 2-bit delta achieves avalanche.
+About 6*len+35 instructions.
+
+The best hash table sizes are powers of 2.  There is no need to do
+mod a prime (mod is sooo slow!).  If you need less than 32 bits,
+use a bitmask.  For example, if you need only 10 bits, do
+  h = (h & hashmask(10));
+In which case, the hash table should have hashsize(10) elements.
+
+If you are hashing n strings (ub1 **)k, do it like this:
+  for (i=0, h=0; i<n; ++i) h = hash( k[i], len[i], h);
+
+By Bob Jenkins, 1996.  bob_jenkins@burtleburtle.net.  You may use this
+code any way you wish, private, educational, or commercial.  It's free.
+
+See http://burtleburtle.net/bob/hash/evahash.html
+Use for hash table lookup, or anything where one collision in 2^^32 is
+acceptable.  Do NOT use for cryptographic purposes.
+--------------------------------------------------------------------
+*/
+
+ub4 jhash(k, length, initval)
+register ub1 *k;        /* the key */
+register ub4  length;   /* the length of the key */
+register ub4  initval;  /* the previous hash, or an arbitrary value */
+{
+   register ub4 a,b,c,len;
+
+   /* Set up the internal state */
+   len = length;
+   a = b = 0x9e3779b9;  /* the golden ratio; an arbitrary value */
+   c = initval;         /* the previous hash value */
+
+   /*---------------------------------------- handle most of the key */
+   while (len >= 12)
+   {
+      a += (k[0] +((ub4)k[1]<<8) +((ub4)k[2]<<16) +((ub4)k[3]<<24));
+      b += (k[4] +((ub4)k[5]<<8) +((ub4)k[6]<<16) +((ub4)k[7]<<24));
+      c += (k[8] +((ub4)k[9]<<8) +((ub4)k[10]<<16)+((ub4)k[11]<<24));
+      mix(a,b,c);
+      k += 12; len -= 12;
+   }
+
+   /*------------------------------------- handle the last 11 bytes */
+   c += length;
+   switch(len)              /* all the case statements fall through */
+   {
+   case 11: c+=((ub4)k[10]<<24);
+   case 10: c+=((ub4)k[9]<<16);
+   case 9 : c+=((ub4)k[8]<<8);
+      /* the first byte of c is reserved for the length */
+   case 8 : b+=((ub4)k[7]<<24);
+   case 7 : b+=((ub4)k[6]<<16);
+   case 6 : b+=((ub4)k[5]<<8);
+   case 5 : b+=k[4];
+   case 4 : a+=((ub4)k[3]<<24);
+   case 3 : a+=((ub4)k[2]<<16);
+   case 2 : a+=((ub4)k[1]<<8);
+   case 1 : a+=k[0];
+     /* case 0: nothing left to add */
+   }
+   mix(a,b,c);
+   /*-------------------------------------------- report the result */
+   return c;
+}
+
+#undef hashsize
+#undef hashmask
+
diff --git a/src/libknot/hash/hash-functions.h b/src/libknot/hash/hash-functions.h
new file mode 100644
index 0000000..f23730b
--- /dev/null
+++ b/src/libknot/hash/hash-functions.h
@@ -0,0 +1,85 @@
+/*!
+ * \file hash-functions.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Various hash functions.
+ *
+ * All of the hash functions are downloaded from various sources.
+ *
+ * \todo Add references to sources.
+ *
+ * \addtogroup hashing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_HASH_FUNCTIONS_H_
+#define _KNOT_HASH_FUNCTIONS_H_
+
+#include <stdint.h>
+#include <string.h>
+
+/*
+ * Fowler / Noll / Vo Hash (FNV Hash)
+ * http://www.isthe.com/chongo/tech/comp/fnv/
+ *
+ * This is an implementation of the algorithms posted above.
+ * This file is placed in the public domain by Peter Wemm.
+ *
+ * $FreeBSD: src/sys/sys/fnv_hash.h,v 1.2.2.1 2001/03/21 10:50:59 peter Exp $
+ */
+
+typedef uint32_t Fnv32_t;
+
+#define FNV1_32_INIT ((Fnv32_t) 33554467UL)
+
+#define FNV_32_PRIME ((Fnv32_t) 0x01000193UL)
+
+static __inline Fnv32_t
+fnv_32_buf(const void *buf, size_t len, Fnv32_t hval)
+{
+	const uint8_t *s = (const uint8_t *)buf;
+
+	while (len-- != 0) {
+		hval *= FNV_32_PRIME;
+		hval ^= *s++;
+	}
+	return hval;
+}
+
+/*!
+ * \brief Jenkins hash function.
+ *
+ * Downloaded from http://burtleburtle.net/bob/hash/evahash.html
+ *
+ * \param k Data to hash
+ * \param length Size of the data in bytes.
+ * \param initval The previous hash or an arbitrary value.
+ *
+ * \return Hash of the data.
+ *
+ * \todo Add source.
+ */
+typedef  unsigned long  int  ub4;   /* unsigned 4-byte quantities */
+typedef  unsigned       char ub1;   /* unsigned 1-byte quantities */
+
+ub4 jhash(register ub1 *k, register ub4 length, register ub4 initval);
+
+#endif /* _KNOT_HASH_FUNCTIONS_H_ */
+
+/*! @} */
diff --git a/src/libknot/hash/universal-system.c b/src/libknot/hash/universal-system.c
new file mode 100644
index 0000000..096974c
--- /dev/null
+++ b/src/libknot/hash/universal-system.c
@@ -0,0 +1,116 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <limits.h>
+#include <stdint.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "universal-system.h"
+#include "common.h"
+#include "util/utils.h"
+
+/*----------------------------------------------------------------------------*/
+
+const uint MAX_UINT_EXP = 32;
+const unsigned long MAX_UINT_MY = UINT32_MAX; /* 4294967295 */
+
+/*----------------------------------------------------------------------------*/
+/* Private functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Generates new set of coeficients.
+ *
+ * \param system Universal system to generate the coeficients for.
+ * \param from First coeficient to be replaced.
+ * \param to Up to this the coeficients will be replaced.
+ */
+static void us_generate_coefs(us_system_t *system, uint from, uint to)
+{
+	assert(system != NULL);
+
+	for (uint i = from; i < to; ++i) {
+		int used = 0;
+
+		do {
+			// generate random odd number
+			system->coefs[i] = knot_quick_rand() % MAX_UINT_MY;
+			if (system->coefs[i] % 2 == 0) {
+				system->coefs[i] = (system->coefs[i] == 0)
+				                    ? 1
+				                    : system->coefs[i] - 1;
+			}
+			// check if this coeficient is already used
+			uint j = from;
+			while (used == 0 && j < i) {
+				if (system->coefs[j++] == system->coefs[i]) {
+					used = 1;
+				}
+			}
+			// if already used, generate again
+		} while (used != 0);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/* Public functions                                                           */
+/*----------------------------------------------------------------------------*/
+
+void us_initialize(us_system_t *system)
+{
+	assert(system != NULL);
+	assert(UINT_MAX == MAX_UINT_MY);
+
+	// Initialize both generations of functions by generating random odd
+	// numbers
+	us_generate_coefs(system, 0, US_FNC_COUNT * GEN_COUNT);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \note \a generation starts from 1
+ */
+int us_next(us_system_t *system, uint generation)
+{
+	assert(system != NULL);
+	// generate new coeficients for the new generation
+	us_generate_coefs(system, (generation - 1) * US_FNC_COUNT,
+	                  generation * US_FNC_COUNT);
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint32_t us_hash(const us_system_t *system, uint32_t value, uint table_exp,
+                 uint fnc, uint generation)
+{
+	/*
+	 * multiplication should overflow if larger than MAX_UINT
+	 * this is the same as (coef * value) mod MAX_UINT
+	 *
+	 * TODO: maybe we should not rely on this
+	 */
+	assert(system != NULL);
+	assert(table_exp <= 32);
+	assert(fnc < US_FNC_COUNT);
+	assert(generation <= GEN_COUNT);
+
+	return ((system->coefs[((generation - 1) * US_FNC_COUNT) + fnc] * value)
+	        >> (MAX_UINT_EXP - table_exp));
+}
diff --git a/src/libknot/hash/universal-system.h b/src/libknot/hash/universal-system.h
new file mode 100644
index 0000000..25330de
--- /dev/null
+++ b/src/libknot/hash/universal-system.h
@@ -0,0 +1,109 @@
+/*!
+ * \file universal-system.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * This file provides interface to a 2-universal system of hash functions that
+ * hash from 32-bit unsigned integer to a 32-bit unsigned integer within a given
+ * range. The range is always a power of two and is given by the exponent (see
+ * function us_hash().
+ *
+ * Before using the system, it must be initialized by calling us_initialize().
+ * The system stores 2 sets (generations), each of US_FNC_COUNT functions.
+ * For generating a new set of coeficients (i.e. hash functions) use the
+ * us_next() function.
+ *
+ * For hashing use the us_hash() function.
+ *
+ * \todo What if all numbers are tried and still need rehash?
+ *       (that means 2mld rehashes - we can probably live with that ;)
+ * \todo Consider counting generations from 0, will be easier!
+ * \todo Check out some better random number generator.
+ *
+ * \addtogroup hashing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_UNIVERSAL_SYSTEM_H_
+#define _KNOT_UNIVERSAL_SYSTEM_H_
+
+#include <stdint.h>
+#include "common.h"
+
+
+enum { US_FNC_COUNT = 4 /*!< Number of functions for one generation. */ };
+
+enum { GEN_COUNT = 2 /*!< Number of generations. */ };
+
+/*----------------------------------------------------------------------------*/
+/*! \brief Analytically defined universal system of hashing functions. */
+struct us_system {
+	/*! \brief Coeficients for the functions */
+	uint coefs[US_FNC_COUNT * GEN_COUNT];
+};
+
+typedef struct us_system us_system_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Initializes the universal system by generating coeficients for all
+ *        hash functions and all generations.
+ *
+ * \param system Universal system to be used.
+ */
+void us_initialize(us_system_t *system);
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Generates new hash functions' coeficients for the given \a generation.
+ *
+ * \param system Universal system to be used.
+ * \param generation Generation for which to generate the new coeficients.
+ *
+ * \return 0
+ */
+int us_next(us_system_t *system, uint generation);
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Hashes the \a value using the given \a exponent and function.
+ *
+ * The actual formula of the hash is:
+ * h = ((coef * value) mod 2^32) / 2^(32 - table_exp)
+ * where \a coef is the proper coeficient.
+ *
+ * \param system Universal system to be used.
+ * \param value Value to be hashed.
+ * \param table_exp Determines the upper bound for the result - the hash will
+ *                  be between 0 and 2^(32 - table_exp).
+ * \param fnc Which function from the set should be used.
+ * \param generation Which set (generation) of functions should be used.
+ *
+ * \todo Make inline?
+ *
+ * \return Hash value (32bit unsigned).
+ */
+uint32_t us_hash(const us_system_t *system, uint32_t value, uint table_exp,
+                 uint fnc, uint generation);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* _KNOT_UNIVERSAL_SYSTEM_H_ */
+
+/*! @} */
diff --git a/src/libknot/libknot.h b/src/libknot/libknot.h
new file mode 100644
index 0000000..a401be7
--- /dev/null
+++ b/src/libknot/libknot.h
@@ -0,0 +1,48 @@
+/*!
+ * \file libknot.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Convenience header for including whole library.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_LIBKNOT_H_
+#define _KNOT_LIBKNOT_H_
+
+#include "consts.h"
+#include "util/descriptor.h"
+#include "dname.h"
+#include "edns.h"
+#include "zone/node.h"
+#include "nsec3.h"
+#include "util/wire.h"
+#include "rdata.h"
+#include "packet/response.h"
+#include "rrset.h"
+#include "util/tolower.h"
+#include "util/utils.h"
+#include "zone/zone.h"
+#include "zone/zonedb.h"
+#include "util/error.h"
+
+#endif
+
+/*! @} */
diff --git a/src/libknot/nameserver/name-server.c b/src/libknot/nameserver/name-server.c
new file mode 100644
index 0000000..f88f802
--- /dev/null
+++ b/src/libknot/nameserver/name-server.c
@@ -0,0 +1,3663 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <sys/time.h>
+
+#include <urcu.h>
+
+#include "nameserver/name-server.h"
+#include "updates/xfr-in.h"
+
+#include "util/error.h"
+#include "libknot.h"
+#include "util/debug.h"
+#include "packet/packet.h"
+#include "packet/response.h"
+#include "packet/query.h"
+#include "consts.h"
+#include "updates/changesets.h"
+#include "updates/ddns.h"
+#include "tsig-op.h"
+
+/*----------------------------------------------------------------------------*/
+
+/*! \brief Maximum UDP payload with EDNS enabled. */
+static const uint16_t MAX_UDP_PAYLOAD_EDNS = 4096;
+/*! \brief Maximum UDP payload with EDNS disabled. */
+static const uint16_t MAX_UDP_PAYLOAD      = 504; // 512 - 8B header
+/*! \brief Maximum size of one AXFR response packet. */
+static const uint16_t MAX_AXFR_PAYLOAD     = 65535;
+/*! \brief Supported EDNS version. */
+static const uint8_t  EDNS_VERSION         = 0;
+/*! \brief Determines whether EDNS is enabled. */
+static const int      EDNS_ENABLED         = 1;
+
+/*! \brief TTL of a CNAME synthetized from a DNAME. */
+static const uint32_t SYNTH_CNAME_TTL      = 0;
+
+/*! \brief Determines whether DNSSEC is enabled. */
+static const int      DNSSEC_ENABLED       = 1;
+
+/*! \brief Determines whether NSID is enabled. */
+static const int      NSID_ENABLED         = 1;
+
+/*! \brief Length of NSID option data. */
+static const uint16_t NSID_LENGTH          = 6;
+/*! \brief NSID option data. */
+static const uint8_t  NSID_DATA[6] = {0x46, 0x6f, 0x6f, 0x42, 0x61, 0x72};
+
+/*! \brief Internal error code to propagate need for SERVFAIL response. */
+static const int      NS_ERR_SERVFAIL      = -999;
+
+/*----------------------------------------------------------------------------*/
+/* Private functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Finds zone where to search for the QNAME.
+ *
+ * \note As QTYPE DS requires special handling, this function finds a zone for
+ *       a direct predecessor of QNAME in such case.
+ *
+ * \param zdb Zone database where to search for the proper zone.
+ * \param qname QNAME.
+ * \param qtype QTYPE.
+ *
+ * \return Zone to which QNAME belongs (according to QTYPE), or NULL if no such
+ *         zone was found.
+ */
+static const knot_zone_t *ns_get_zone_for_qname(knot_zonedb_t *zdb,
+                                                  const knot_dname_t *qname,
+                                                  uint16_t qtype)
+{
+	const knot_zone_t *zone;
+	/*
+	 * Find a zone in which to search.
+	 *
+	 * In case of DS query, we strip the leftmost label when searching for
+	 * the zone (but use whole qname in search for the record), as the DS
+	 * records are only present in a parent zone.
+	 */
+	if (qtype == KNOT_RRTYPE_DS) {
+		/*! \todo Optimize, do not deep copy dname. */
+		knot_dname_t *name = knot_dname_left_chop(qname);
+		zone = knot_zonedb_find_zone_for_name(zdb, name);
+		/* Directly discard. */
+		knot_dname_free(&name);
+	} else {
+		zone = knot_zonedb_find_zone_for_name(zdb, qname);
+	}
+
+	return zone;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Synthetizes RRSet from a wildcard RRSet using the given QNAME.
+ *
+ * The synthetized RRSet is identical to the wildcard RRSets, except that the
+ * owner name is replaced by \a qname.
+ *
+ * \param wildcard_rrset Wildcard RRSet to synthetize from.
+ * \param qname Domain name to be used as the owner of the synthetized RRset.
+ *
+ * \return The synthetized RRSet (this is a newly created RRSet, remember to
+ *         free it).
+ */
+static knot_rrset_t *ns_synth_from_wildcard(
+	const knot_rrset_t *wildcard_rrset, const knot_dname_t *qname)
+{
+	dbg_ns("Synthetizing RRSet from wildcard...\n");
+
+	knot_dname_t *owner = knot_dname_deep_copy(qname);
+//	printf("Copied owner ptr: %p\n", owner);
+
+	knot_rrset_t *synth_rrset = knot_rrset_new(
+			owner, knot_rrset_type(wildcard_rrset),
+			knot_rrset_class(wildcard_rrset),
+			knot_rrset_ttl(wildcard_rrset));
+
+	/* Release owner, as it's retained in rrset. */
+	knot_dname_release(owner);
+
+	if (synth_rrset == NULL) {
+		return NULL;
+	}
+
+	dbg_ns("Created RRSet header:\n");
+	knot_rrset_dump(synth_rrset, 1);
+
+	// copy all RDATA
+	const knot_rdata_t *rdata = knot_rrset_rdata(wildcard_rrset);
+	while (rdata != NULL) {
+		// we could use the RDATA from the wildcard rrset
+		// but there is no way to distinguish it when deleting
+		// temporary RRSets
+		knot_rdata_t *rdata_copy = knot_rdata_deep_copy(rdata,
+		                                knot_rrset_type(synth_rrset));
+		if (rdata_copy == NULL) {
+			knot_rrset_deep_free(&synth_rrset, 1, 1, 0);
+			return NULL;
+		}
+
+		dbg_ns("Copied RDATA:\n");
+		knot_rdata_dump(rdata_copy,
+		                  knot_rrset_type(synth_rrset), 1);
+
+		knot_rrset_add_rdata(synth_rrset, rdata_copy);
+		rdata = knot_rrset_rdata_next(wildcard_rrset, rdata);
+	}
+
+//	printf("Synthetized RRSet pointer: %p\n", synth_rrset);
+	return synth_rrset;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks if the given RRSet is a wildcard RRSet and replaces it with
+ *        a synthetized RRSet if required.
+ *
+ * \param name Domain name to be used as the owner of the possibly synthetized
+ *             RRSet
+ * \param resp Response to which the synthetized RRSet should be stored (as a
+ *             temporary RRSet).
+ * \param rrset RRSet to check (and possibly replace).
+ */
+static void ns_check_wildcard(const knot_dname_t *name, knot_packet_t *resp,
+                              const knot_rrset_t **rrset)
+{
+	assert(name != NULL);
+	assert(resp != NULL);
+	assert(rrset != NULL);
+	assert(*rrset != NULL);
+
+	if (knot_dname_is_wildcard((*rrset)->owner)) {
+		knot_rrset_t *synth_rrset =
+			ns_synth_from_wildcard(*rrset, name);
+		dbg_ns("Synthetized RRSet:\n");
+		knot_rrset_dump(synth_rrset, 1);
+		knot_packet_add_tmp_rrset(resp, synth_rrset);
+		*rrset = synth_rrset;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds signatures (RRSIGs) for the given RRSet to the response.
+ *
+ * This function first checks if DNSSEC is enabled and if it was requested in
+ * the response (DO bit set). If not, it does nothing and returns 0. If yes,
+ * it retrieves RRSIGs stored in the RRSet, deals with possible wildcard owner
+ * and adds the RRSIGs to response using the given function (that determines
+ * to which section of the response they will be added).
+ *
+ * \param rrset RRSet to get the RRSIGs from.
+ * \param resp Response where to add the RRSIGs.
+ * \param name Actual name to be used as owner in case of wildcard RRSet.
+ * \param add_rrset_to_resp Function for adding the RRSIG RRset to the response.
+ * \param tc Set to 1 if omitting the RRSIG RRSet should result in setting the
+ *           TC bit in the response.
+ *
+ * \return KNOT_EOK
+ * \return KNOT_ENOMEM
+ * \return KNOT_ESPACE
+ */
+static int ns_add_rrsigs(const knot_rrset_t *rrset, knot_packet_t *resp,
+                         const knot_dname_t *name,
+                         int (*add_rrset_to_resp)(knot_packet_t *,
+                                                   const knot_rrset_t *,
+                                                   int, int, int),
+                         int tc)
+{
+	const knot_rrset_t *rrsigs;
+
+	dbg_ns("Adding RRSIGs for RRSet, type: %s.\n",
+		 knot_rrtype_to_string(knot_rrset_type(rrset)));
+
+	assert(resp != NULL);
+	assert(add_rrset_to_resp != NULL);
+
+	dbg_ns("DNSSEC requested: %d\n",
+	         knot_query_dnssec_requested(knot_packet_query(resp)));
+	dbg_ns("RRSIGS: %p\n", knot_rrset_rrsigs(rrset));
+
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))
+	    && (rrsigs = knot_rrset_rrsigs(rrset)) != NULL) {
+		if (name != NULL) {
+			ns_check_wildcard(name, resp, &rrsigs);
+		}
+		return add_rrset_to_resp(resp, rrsigs, tc, 0, 0);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Resolves CNAME chain starting in \a node, stores all the CNAMEs in the
+ *        response and updates \a node and \a qname to the last node in the
+ *        chain.
+ *
+ * \param node Node (possibly) containing a CNAME RR.
+ * \param qname Searched name. Will be updated to the canonical name.
+ * \param resp Response where to add the CNAME RRs.
+ * \param add_rrset_to_resp Function for adding the CNAME RRs to the response.
+ * \param tc Set to 1 if omitting the RRSIG RRSet should result in setting the
+ *           TC bit in the response.
+ */
+static void ns_follow_cname(const knot_node_t **node,
+                            const knot_dname_t **qname,
+                            knot_packet_t *resp,
+                            int (*add_rrset_to_resp)(knot_packet_t *,
+                                                     const knot_rrset_t *,
+                                                     int, int, int),
+                            int tc)
+{
+	dbg_ns("Resolving CNAME chain...\n");
+	const knot_rrset_t *cname_rrset;
+
+	while (*node != NULL
+	       && (cname_rrset = knot_node_rrset(*node, KNOT_RRTYPE_CNAME))
+	          != NULL) {
+		/* put the CNAME record to answer, but replace the possible
+		   wildcard name with qname */
+
+		assert(cname_rrset != NULL);
+		
+		dbg_ns("CNAME RRSet: %p, owner: %p\n", cname_rrset,
+			      cname_rrset->owner);
+
+		const knot_rrset_t *rrset = cname_rrset;
+
+		// ignoring other than the first record
+		if (knot_dname_is_wildcard(knot_node_owner(*node))) {
+			/* if wildcard node, we must copy the RRSet and
+			   replace its owner */
+			rrset = ns_synth_from_wildcard(cname_rrset, *qname);
+			knot_packet_add_tmp_rrset(resp, (knot_rrset_t *)rrset);
+			add_rrset_to_resp(resp, rrset, tc, 0, 0);
+			ns_add_rrsigs(cname_rrset, resp, *qname, 
+			              add_rrset_to_resp, tc);
+		} else {
+			add_rrset_to_resp(resp, rrset, tc, 0, 0);
+			ns_add_rrsigs(rrset, resp, *qname, add_rrset_to_resp, 
+			              tc);
+		}
+		
+		dbg_ns("Using RRSet: %p, owner: %p\n", rrset, rrset->owner);
+		
+dbg_ns_exec(
+		char *name = knot_dname_to_str(knot_rrset_owner(rrset));
+		dbg_ns("CNAME record for owner %s put to response.\n", name);
+		free(name);
+);
+
+		// get the name from the CNAME RDATA
+		const knot_dname_t *cname = knot_rdata_cname_name(
+				knot_rrset_rdata(cname_rrset));
+		dbg_ns("CNAME name from RDATA: %p\n", cname);
+		// change the node to the node of that name
+		*node = knot_dname_node(cname, 1);
+		dbg_ns("This name's node: %p\n", *node);
+//		// it is not an old node and if yes, skip it
+//		if (knot_node_is_old(*node)) {
+//			*node = knot_node_new_node(*node);
+//		}
+
+		// save the new name which should be used for replacing wildcard
+		*qname = cname;
+	};
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Retrieves RRSet(s) of given type from the given node and adds them to
+ *        the response's Answer section.
+ *
+ * \param node Node where to take the RRSet from.
+ * \param name Actual searched name (used in case of wildcard RRSet(s)).
+ * \param type Type of the RRSet(s). If set to KNOT_RRTYPE_ANY, all RRSets
+ *             from the node will be added to the answer.
+ * \param resp Response where to add the RRSets.
+ *
+ * \return Number of RRSets added.
+ */
+static int ns_put_answer(const knot_node_t *node, const knot_dname_t *name,
+                          uint16_t type, knot_packet_t *resp)
+{
+	int added = 0;
+dbg_ns_exec(
+	char *name_str = knot_dname_to_str(node->owner);
+	dbg_ns("Putting answers from node %s.\n", name_str);
+	free(name_str);
+);
+
+	switch (type) {
+	case KNOT_RRTYPE_ANY: {
+		dbg_ns("Returning all RRTYPES.\n");
+		const knot_rrset_t **rrsets = knot_node_rrsets(node);
+		if (rrsets == NULL) {
+			break;
+		}
+		int i = 0;
+		int ret = 0;
+		const knot_rrset_t *rrset;
+		while (i < knot_node_rrset_count(node)) {
+			assert(rrsets[i] != NULL);
+			rrset = rrsets[i];
+
+			dbg_ns("  Type: %s\n",
+			     knot_rrtype_to_string(knot_rrset_type(rrset)));
+
+			ns_check_wildcard(name, resp, &rrset);
+			ret = knot_response_add_rrset_answer(resp, rrset, 1,
+			                                        0, 0);
+			if (ret >= 0 && (added += 1)
+			    && (ret = ns_add_rrsigs(rrset, resp, name,
+			           knot_response_add_rrset_answer, 1))
+			            >=0 ) {
+				added += 1;
+			} else {
+				free(rrsets);
+				rrsets = NULL;
+				break;
+			}
+
+			++i;
+		}
+		if (rrsets != NULL) {
+			free(rrsets);
+		}
+		break;
+	}
+	case KNOT_RRTYPE_RRSIG: {
+		dbg_ns("Returning all RRSIGs.\n");
+		const knot_rrset_t **rrsets = knot_node_rrsets(node);
+		if (rrsets == NULL) {
+			break;
+		}
+		int i = 0;
+		int ret = 0;
+		const knot_rrset_t *rrset;
+		while (i < knot_node_rrset_count(node)) {
+			assert(rrsets[i] != NULL);
+			rrset = knot_rrset_rrsigs(rrsets[i]);
+
+			if (rrset == NULL) {
+				++i;
+				continue;
+			}
+
+			ns_check_wildcard(name, resp, &rrset);
+			ret = knot_response_add_rrset_answer(resp, rrset, 1,
+			                                        0, 0);
+
+			if (ret < 0) {
+				break;
+			}
+
+			added += 1;
+			++i;
+		}
+		free(rrsets);
+		break;
+	}
+	default: {
+		int ret = 0;
+		const knot_rrset_t *rrset = knot_node_rrset(node, type);
+		const knot_rrset_t *rrset2 = rrset;
+		if (rrset != NULL) {
+			dbg_ns("Found RRSet of type %s\n",
+				 knot_rrtype_to_string(type));
+			ns_check_wildcard(name, resp, &rrset2);
+			ret = knot_response_add_rrset_answer(resp, rrset2, 1,
+			                                        0, 0);
+			if (ret >= 0 && (added += 1)
+			    && (ret = ns_add_rrsigs(rrset, resp, name,
+			           knot_response_add_rrset_answer, 1)) > 0) {
+				added += 1;
+			}
+		}
+	    }
+	}
+
+	knot_response_set_rcode(resp, KNOT_RCODE_NOERROR);
+	return added;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds RRSets to Additional section of the response.
+ *
+ * This function uses knot_rdata_get_name() to get the domain name from the
+ * RDATA of the RRSet according to its type. It also does not search for the
+ * retrieved domain name, but just uses its node field. Thus to work correctly,
+ * the zone where the RRSet is from should be adjusted using
+ * knot_zone_adjust_dnames().
+ *
+ * A and AAAA RRSets (and possible CNAMEs) for the found domain names are added.
+ *
+ * \warning Use this function only with types containing some domain name,
+ *          otherwise it will crash (or behave strangely).
+ *
+ * \param resp Response where to add the Additional data.
+ * \param rrset RRSet to get the Additional data for.
+ */
+static void ns_put_additional_for_rrset(knot_packet_t *resp,
+                                        const knot_rrset_t *rrset)
+{
+	const knot_node_t *node = NULL;
+	const knot_rdata_t *rdata = NULL;
+	const knot_dname_t *dname = NULL;
+
+	// for all RRs in the RRset
+	rdata = knot_rrset_rdata(rrset);
+	while (rdata != NULL) {
+		dbg_ns("Getting name from RDATA, type %s..\n",
+			 knot_rrtype_to_string(knot_rrset_type(rrset)));
+		dname = knot_rdata_get_name(rdata,
+		                              knot_rrset_type(rrset));
+		assert(dname != NULL);
+		node = knot_dname_node(dname, 1);
+//		// check if the node is not old and if yes, take the new one
+//		if (knot_node_is_old(node)) {
+//			node = knot_node_new_node(node);
+//		}
+		
+		dbg_ns_detail("Node saved in RDATA dname: %p\n", node);
+
+		if (node != NULL && node->owner != dname) {
+			// the stored node should be the closest encloser
+			assert(knot_dname_is_subdomain(dname, node->owner));
+			// try the wildcard child, if any
+			node = knot_node_wildcard_child(node, 1);
+//			// this should not be old node!!
+//			assert(!knot_node_is_old(node));
+		}
+
+		const knot_rrset_t *rrset_add;
+
+		if (node != NULL) {
+dbg_ns_exec(
+			char *name = knot_dname_to_str(node->owner);
+			dbg_ns("Putting additional from node %s\n", name);
+			free(name);
+);
+			dbg_ns("Checking CNAMEs...\n");
+			if (knot_node_rrset(node, KNOT_RRTYPE_CNAME)
+			    != NULL) {
+				dbg_ns("Found CNAME in node, following...\n");
+				const knot_dname_t *dname
+						= knot_node_owner(node);
+				ns_follow_cname(&node, &dname, resp,
+				    knot_response_add_rrset_additional, 0);
+			}
+
+			// A RRSet
+			dbg_ns("A RRSets...\n");
+			rrset_add = knot_node_rrset(node, KNOT_RRTYPE_A);
+			if (rrset_add != NULL) {
+				dbg_ns("Found A RRsets.\n");
+				const knot_rrset_t *rrset_add2 = rrset_add;
+				ns_check_wildcard(dname, resp, &rrset_add2);
+				knot_response_add_rrset_additional(
+					resp, rrset_add2, 0, 1, 0);
+				ns_add_rrsigs(rrset_add, resp, dname,
+				      knot_response_add_rrset_additional, 0);
+			}
+
+			// AAAA RRSet
+			dbg_ns("AAAA RRSets...\n");
+			rrset_add = knot_node_rrset(node, KNOT_RRTYPE_AAAA);
+			if (rrset_add != NULL) {
+				dbg_ns("Found AAAA RRsets.\n");
+				const knot_rrset_t *rrset_add2 = rrset_add;
+				ns_check_wildcard(dname, resp, &rrset_add2);
+				knot_response_add_rrset_additional(
+					resp, rrset_add2, 0, 1, 0);
+				ns_add_rrsigs(rrset_add, resp, dname,
+				      knot_response_add_rrset_additional, 0);
+			}
+		}
+
+		assert(rrset != NULL);
+		assert(rdata != NULL);
+		rdata = knot_rrset_rdata_next(rrset, rdata);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks whether the given type requires additional processing.
+ *
+ * Only MX, NS and SRV types require additional processing.
+ *
+ * \param qtype Type to check.
+ *
+ * \retval <> 0 if additional processing is needed for \a qtype.
+ * \retval 0 otherwise.
+ */
+static int ns_additional_needed(uint16_t qtype)
+{
+	return (qtype == KNOT_RRTYPE_MX ||
+	        qtype == KNOT_RRTYPE_NS ||
+		qtype == KNOT_RRTYPE_SRV);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds whatever Additional RRSets are required for the response.
+ *
+ * For each RRSet in Answer and Authority sections this function checks if
+ * additional processing is needed and if yes, it puts any Additional RRSets
+ * available to the Additional section of the response.
+ *
+ * \param resp Response to process.
+ */
+static void ns_put_additional(knot_packet_t *resp)
+{
+	dbg_ns("ADDITIONAL SECTION PROCESSING\n");
+
+	const knot_rrset_t *rrset = NULL;
+
+	for (int i = 0; i < knot_packet_answer_rrset_count(resp); ++i) {
+		rrset = knot_packet_answer_rrset(resp, i);
+		assert(rrset != NULL);
+		if (ns_additional_needed(knot_rrset_type(rrset))) {
+			ns_put_additional_for_rrset(resp, rrset);
+		}
+	}
+
+	for (int i = 0; i < knot_packet_authority_rrset_count(resp); ++i) {
+		rrset = knot_packet_authority_rrset(resp, i);
+		if (ns_additional_needed(knot_rrset_type(rrset))) {
+			ns_put_additional_for_rrset(resp, rrset);
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts authority NS RRSet to the Auhority section of the response.
+ *
+ * \param zone Zone to take the authority NS RRSet from.
+ * \param resp Response where to add the RRSet.
+ */
+static void ns_put_authority_ns(const knot_zone_contents_t *zone,
+                                knot_packet_t *resp)
+{
+	const knot_rrset_t *ns_rrset = knot_node_rrset(
+			knot_zone_contents_apex(zone), KNOT_RRTYPE_NS);
+
+	if (ns_rrset != NULL) {
+		knot_response_add_rrset_authority(resp, ns_rrset, 0, 1, 0);
+		ns_add_rrsigs(ns_rrset, resp, knot_node_owner(
+		              knot_zone_contents_apex(zone)),
+	                      knot_response_add_rrset_authority, 1);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts SOA RRSet to the Auhority section of the response.
+ *
+ * \param zone Zone to take the SOA RRSet from.
+ * \param resp Response where to add the RRSet.
+ */
+static void ns_put_authority_soa(const knot_zone_contents_t *zone,
+                                 knot_packet_t *resp)
+{
+	const knot_rrset_t *soa_rrset = knot_node_rrset(
+			knot_zone_contents_apex(zone), KNOT_RRTYPE_SOA);
+	assert(soa_rrset != NULL);
+
+	knot_response_add_rrset_authority(resp, soa_rrset, 0, 0, 0);
+	ns_add_rrsigs(soa_rrset, resp,
+	              knot_node_owner(knot_zone_contents_apex(zone)),
+	              knot_response_add_rrset_authority, 1);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a 'next closer name' to the given domain name.
+ *
+ * For definition of 'next closer name', see RFC5155, Page 6.
+ *
+ * \param closest_encloser Closest encloser of \a name.
+ * \param name Domain name to create the 'next closer' name to.
+ *
+ * \return 'Next closer name' to the given domain name or NULL if an error
+ *         occured.
+ */
+static knot_dname_t *ns_next_closer(const knot_dname_t *closest_encloser,
+                                      const knot_dname_t *name)
+{
+	int ce_labels = knot_dname_label_count(closest_encloser);
+	int qname_labels = knot_dname_label_count(name);
+
+	assert(ce_labels < qname_labels);
+
+	// the common labels should match
+	assert(knot_dname_matched_labels(closest_encloser, name)
+	       == ce_labels);
+
+	// chop some labels from the qname
+	knot_dname_t *next_closer = knot_dname_deep_copy(name);
+	if (next_closer == NULL) {
+		return NULL;
+	}
+
+	for (int i = 0; i < (qname_labels - ce_labels - 1); ++i) {
+		knot_dname_left_chop_no_copy(next_closer);
+	}
+
+	return next_closer;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds NSEC3 RRSet (together with corresponding RRSIGs) from the given
+ *        node into the response.
+ *
+ * \param node Node to get the NSEC3 RRSet from.
+ * \param resp Response where to add the RRSets.
+ */
+static void ns_put_nsec3_from_node(const knot_node_t *node,
+                                   knot_packet_t *resp)
+{
+	assert(DNSSEC_ENABLED
+	       && knot_query_dnssec_requested(knot_packet_query(resp)));
+
+	const knot_rrset_t *rrset = knot_node_rrset(node,
+	                                                KNOT_RRTYPE_NSEC3);
+	assert(rrset != NULL);
+
+	int res = knot_response_add_rrset_authority(resp, rrset, 1, 1, 0);
+	// add RRSIG for the RRSet
+	if (res == 0 && (rrset = knot_rrset_rrsigs(rrset)) != NULL) {
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Finds and adds NSEC3 covering the given domain name (and their
+ *        associated RRSIGs) to the response.
+ *
+ * \param zone Zone used for answering.
+ * \param name Domain name to cover.
+ * \param resp Response where to add the RRSets.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL if a runtime collision occured. The server should
+ *                         respond with SERVFAIL in such case.
+ */
+static int ns_put_covering_nsec3(const knot_zone_contents_t *zone,
+                                 const knot_dname_t *name,
+                                 knot_packet_t *resp)
+{
+	const knot_node_t *prev, *node;
+	/*! \todo Check version. */
+	int match = knot_zone_contents_find_nsec3_for_name(zone, name,
+	                                                     &node, &prev, 1);
+	assert(match >= 0);
+	node = knot_node_current(node);
+	prev = knot_node_current(prev);
+
+	if (match == KNOT_ZONE_NAME_FOUND){
+		// run-time collision => SERVFAIL
+		return KNOT_EOK;
+	}
+	
+//	// check if the prev node is not old and if yes, take the new one
+//	if (knot_node_is_old(prev)) {
+//		prev = knot_node_new_node(prev);
+//		assert(prev != NULL);
+//	}
+
+dbg_ns_exec(
+	char *name = knot_dname_to_str(prev->owner);
+	dbg_ns("Covering NSEC3 node: %s\n", name);
+	free(name);
+);
+
+	ns_put_nsec3_from_node(prev, resp);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds NSEC3s comprising the 'closest encloser proof' for the given
+ *        (non-existent) domain name (and their associated RRSIGs) to the
+ *        response.
+ *
+ * For definition of 'closest encloser proof', see RFC5155, section 7.2.1,
+ * Page 18.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param zone Zone used for answering.
+ * \param closest_encloser Closest encloser of \a qname in the zone.
+ * \param qname Searched (non-existent) name.
+ * \param resp Response where to add the NSEC3s.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec3_closest_encloser_proof(
+                                         const knot_zone_contents_t *zone,
+                                         const knot_node_t **closest_encloser,
+                                         const knot_dname_t *qname,
+                                         knot_packet_t *resp)
+{
+	assert(zone != NULL);
+	assert(closest_encloser != NULL);
+	assert(*closest_encloser != NULL);
+	assert(qname != NULL);
+	assert(resp != NULL);
+
+	if (knot_zone_contents_nsec3params(zone) == NULL) {
+dbg_ns_exec(
+		char *name = knot_dname_to_str(knot_node_owner(
+				knot_zone_contents_apex(zone)));
+		dbg_ns("No NSEC3PARAM found in zone %s.\n", name);
+		free(name);
+);
+		return KNOT_EOK;
+	}
+
+dbg_ns_exec(
+	char *name = knot_dname_to_str(knot_node_owner(*closest_encloser));
+	dbg_ns("Closest encloser: %s\n", name);
+	free(name);
+);
+
+	/*
+	 * 1) NSEC3 that matches closest provable encloser.
+	 */
+	const knot_node_t *nsec3_node = NULL;
+	const knot_dname_t *next_closer = NULL;
+	while ((nsec3_node = knot_node_nsec3_node((*closest_encloser), 1))
+	       == NULL) {
+		next_closer = knot_node_owner((*closest_encloser));
+		*closest_encloser = knot_node_parent(*closest_encloser, 1);
+		if (*closest_encloser == NULL) {
+			// there are no NSEC3s to add
+			return KNOT_EOK;
+		}
+	}
+
+	assert(nsec3_node != NULL);
+
+dbg_ns_exec(
+	char *name = knot_dname_to_str(nsec3_node->owner);
+	dbg_ns("NSEC3 node: %s\n", name);
+	free(name);
+	name = knot_dname_to_str((*closest_encloser)->owner);
+	dbg_ns("Closest provable encloser: %s\n", name);
+	free(name);
+	if (next_closer != NULL) {
+		name = knot_dname_to_str(next_closer);
+		dbg_ns("Next closer name: %s\n", name);
+		free(name);
+	} else {
+		dbg_ns("Next closer name: none\n");
+	}
+);
+
+	ns_put_nsec3_from_node(nsec3_node, resp);
+
+	/*
+	 * 2) NSEC3 that covers the "next closer" name.
+	 */
+	int ret = 0;
+	if (next_closer == NULL) {
+		// create the "next closer" name by appending from qname
+		next_closer = ns_next_closer(
+			knot_node_owner(*closest_encloser), qname);
+
+		if (next_closer == NULL) {
+			return NS_ERR_SERVFAIL;
+		}
+dbg_ns_exec(
+		char *name = knot_dname_to_str(next_closer);
+		dbg_ns("Next closer name: %s\n", name);
+		free(name);
+);
+		ret = ns_put_covering_nsec3(zone, next_closer, resp);
+
+		// the cast is ugly, but no better way around it
+		knot_dname_release((knot_dname_t *)next_closer);
+	} else {
+		ret = ns_put_covering_nsec3(zone, next_closer, resp);
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a name of a wildcard child of \a name.
+ *
+ * \param name Domain name to get the wildcard child name of.
+ *
+ * \return Wildcard child name or NULL if an error occured.
+ */
+static knot_dname_t *ns_wildcard_child_name(const knot_dname_t *name)
+{
+	assert(name != NULL);
+
+	knot_dname_t *wildcard = knot_dname_new_from_str("*", 1, NULL);
+	if (wildcard == NULL) {
+		return NULL;
+	}
+
+	if (knot_dname_cat(wildcard, name) == NULL) {
+		/* Directly discard dname. */
+		knot_dname_free(&wildcard);
+		return NULL;
+	}
+
+dbg_ns_exec(
+	char *name = knot_dname_to_str(wildcard);
+	dbg_ns("Wildcard: %s\n", name);
+	free(name);
+);
+	return wildcard;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSEC3s covering the non-existent wildcard child of a node
+ *        (and their associated RRSIGs) into the response.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param zone Zone used for answering.
+ * \param node Node whose non-existent wildcard child should be covered.
+ * \param resp Response where to add the NSEC3s.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec3_no_wildcard_child(const knot_zone_contents_t *zone,
+                                          const knot_node_t *node,
+                                          knot_packet_t *resp)
+{
+	assert(node != NULL);
+	assert(resp != NULL);
+	assert(node->owner != NULL);
+
+	int ret = 0;
+	knot_dname_t *wildcard = ns_wildcard_child_name(node->owner);
+	if (wildcard == NULL) {
+		ret = NS_ERR_SERVFAIL;
+	} else {
+		ret = ns_put_covering_nsec3(zone, wildcard, resp);
+
+		/* Directly discard wildcard. */
+		knot_dname_free(&wildcard);
+	}
+
+	return ret;
+}
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs or NSEC3s for NODATA error (and their associated RRSIGs)
+ *        to the response.
+ *
+ * \note This function first checks if DNSSEC is enabled and requested by the
+ *       query.
+ * \note Note that for each zone there are either NSEC or NSEC3 records used.
+ *
+ * \param node Node which generated the NODATA response (i.e. not containing
+ *             RRSets of the requested type).
+ * \param resp Response where to add the NSECs or NSEC3s.
+ */
+static void ns_put_nsec_nsec3_nodata(const knot_node_t *node,
+                                     knot_packet_t *resp)
+{
+	if (!DNSSEC_ENABLED ||
+	    !knot_query_dnssec_requested(knot_packet_query(resp))) {
+		return;
+	}
+
+	const knot_node_t *nsec3_node = knot_node_nsec3_node(node, 1);
+	const knot_rrset_t *rrset = NULL;
+	if ((rrset = knot_node_rrset(node, KNOT_RRTYPE_NSEC)) != NULL
+	    || (nsec3_node != NULL && (rrset =
+	         knot_node_rrset(nsec3_node, KNOT_RRTYPE_NSEC3)) != NULL)) {
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+		// add RRSIG for the RRSet
+		if ((rrset = knot_rrset_rrsigs(rrset)) != NULL) {
+			knot_response_add_rrset_authority(resp, rrset, 1,
+			                                     0, 0);
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs for NXDOMAIN error to the response.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param qname QNAME which generated the NXDOMAIN error (i.e. not found in the
+ *              zone).
+ * \param zone Zone used for answering.
+ * \param previous Previous node to \a qname in the zone. May also be NULL. In
+ *                 such case the function finds the previous node in the zone.
+ * \param closest_encloser Closest encloser of \a qname. Must not be NULL.
+ * \param resp Response where to put the NSECs.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec_nxdomain(const knot_dname_t *qname,
+                                const knot_zone_contents_t *zone,
+                                const knot_node_t *previous,
+                                const knot_node_t *closest_encloser,
+                                knot_packet_t *resp)
+{
+	const knot_rrset_t *rrset = NULL;
+
+	// check if we have previous; if not, find one using the tree
+	if (previous == NULL) {
+		/*! \todo Check version. */
+		previous = knot_zone_contents_find_previous(zone, qname);
+		
+		while (!knot_node_is_auth(previous)) {
+			previous = knot_node_previous(previous, 1);
+		}
+		
+		previous = knot_node_current(previous);
+		assert(previous != NULL);
+	}
+	
+	char *name = knot_dname_to_str(previous->owner);
+	dbg_ns("Previous node: %s\n", name);
+	free(name);
+
+	// 1) NSEC proving that there is no node with the searched name
+	rrset = knot_node_rrset(previous, KNOT_RRTYPE_NSEC);
+	if (rrset == NULL) {
+		// no NSEC records
+		//return NS_ERR_SERVFAIL;
+		return KNOT_EOK;
+		
+	}
+
+	knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+	rrset = knot_rrset_rrsigs(rrset);
+	assert(rrset != NULL);
+	knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+
+	// 2) NSEC proving that there is no wildcard covering the name
+	// this is only different from 1) if the wildcard would be
+	// before 'previous' in canonical order, i.e. we can
+	// search for previous until we find name lesser than wildcard
+	assert(closest_encloser != NULL);
+
+	knot_dname_t *wildcard =
+		ns_wildcard_child_name(closest_encloser->owner);
+	if (wildcard == NULL) {
+		return NS_ERR_SERVFAIL;
+	}
+
+	const knot_node_t *prev_new = previous;
+
+	while (knot_dname_compare(knot_node_owner(prev_new),
+				    wildcard) > 0) {
+		dbg_ns("Previous node: %s\n",
+		    knot_dname_to_str(knot_node_owner(prev_new)));
+		assert(prev_new != knot_zone_contents_apex(zone));
+		prev_new = knot_node_previous(prev_new, 1);
+	}
+	assert(knot_dname_compare(knot_node_owner(prev_new),
+	                            wildcard) < 0);
+
+	dbg_ns("Previous node: %s\n",
+	    knot_dname_to_str(knot_node_owner(prev_new)));
+
+	/* Directly discard dname. */
+	knot_dname_free(&wildcard);
+
+	if (prev_new != previous) {
+		rrset = knot_node_rrset(prev_new, KNOT_RRTYPE_NSEC);
+		assert(rrset != NULL);
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+		rrset = knot_rrset_rrsigs(rrset);
+		assert(rrset != NULL);
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSEC3s for NXDOMAIN error to the response.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param zone Zone used for answering.
+ * \param closest_encloser Closest encloser of \a qname.
+ * \param qname Domain name which generated the NXDOMAIN error (i.e. not found
+ *              in the zone.
+ * \param resp Response where to put the NSEC3s.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec3_nxdomain(const knot_zone_contents_t *zone,
+                                 const knot_node_t *closest_encloser,
+                                 const knot_dname_t *qname,
+                                 knot_packet_t *resp)
+{
+	// 1) Closest encloser proof
+	dbg_ns("Putting closest encloser proof.\n");
+	int ret = ns_put_nsec3_closest_encloser_proof(zone, &closest_encloser,
+	                                              qname, resp);
+	// 2) NSEC3 covering non-existent wildcard
+	if (ret == KNOT_EOK && closest_encloser != NULL) {
+		dbg_ns("Putting NSEC3 for no wildcard child of closest "
+		              "encloser.\n");
+		ret = ns_put_nsec3_no_wildcard_child(zone, closest_encloser,
+		                                     resp);
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs or NSEC3s for the NXDOMAIN error to the response.
+ *
+ * \note This function first checks if DNSSEC is enabled and requested by the
+ *       query.
+ * \note Note that for each zone there are either NSEC or NSEC3 records used.
+ *
+ * \param zone Zone used for answering.
+ * \param previous Previous node to \a qname in the zone. May also be NULL. In
+ *                 such case the function finds the previous node in the zone.
+ * \param closest_encloser Closest encloser of \a qname. Must not be NULL.
+ * \param qname QNAME which generated the NXDOMAIN error (i.e. not found in the
+ *              zone).
+ * \param resp Response where to put the NSECs.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec_nsec3_nxdomain(const knot_zone_contents_t *zone,
+                                      const knot_node_t *previous,
+                                      const knot_node_t *closest_encloser,
+                                      const knot_dname_t *qname,
+                                      knot_packet_t *resp)
+{
+	int ret = 0;
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))) {
+		if (knot_zone_contents_nsec3_enabled(zone)) {
+			ret = ns_put_nsec3_nxdomain(zone, closest_encloser,
+			                            qname, resp);
+		} else {
+			ret = ns_put_nsec_nxdomain(qname, zone, previous,
+		                                   closest_encloser, resp);
+		}
+	}
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSEC3s for wildcard answer into the response.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param zone Zone used for answering.
+ * \param closest_encloser Closest encloser of \a qname in the zone. In this
+ *                         case it is the parent of the source of synthesis.
+ * \param qname Domain name covered by the wildcard used for answering the
+ *              query.
+ * \param resp Response to put the NSEC3s into.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec3_wildcard(const knot_zone_contents_t *zone,
+                                 const knot_node_t *closest_encloser,
+                                 const knot_dname_t *qname,
+                                 knot_packet_t *resp)
+{
+	assert(closest_encloser != NULL);
+	assert(qname != NULL);
+	assert(resp != NULL);
+	assert(DNSSEC_ENABLED
+	       && knot_query_dnssec_requested(knot_packet_query(resp)));
+
+	if (!knot_zone_contents_nsec3_enabled(zone)) {
+		return KNOT_EOK;
+	}
+	
+	/*
+	 * NSEC3 that covers the "next closer" name.
+	 */
+	// create the "next closer" name by appending from qname
+	dbg_ns("Finding next closer name for wildcard NSEC3.\n");
+	knot_dname_t *next_closer =
+		ns_next_closer(closest_encloser->owner, qname);
+
+	if (next_closer == NULL) {
+		return NS_ERR_SERVFAIL;
+	}
+dbg_ns_exec(
+	char *name = knot_dname_to_str(next_closer);
+	dbg_ns("Next closer name: %s\n", name);
+	free(name);
+);
+	int ret = ns_put_covering_nsec3(zone, next_closer, resp);
+
+
+	/* Duplicate from ns_next_close(), safe to discard. */
+	knot_dname_release(next_closer);
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs for wildcard answer into the response.
+ *
+ * \note This function does not check if DNSSEC is enabled, nor if it is
+ *       requested by the query.
+ *
+ * \param zone Zone used for answering.
+ * \param qname Domain name covered by the wildcard used for answering the
+ *              query.
+ * \param previous Previous node of \a qname in canonical order.
+ * \param resp Response to put the NSEC3s into.
+ */
+static void ns_put_nsec_wildcard(const knot_zone_contents_t *zone,
+                                 const knot_dname_t *qname,
+                                 const knot_node_t *previous,
+                                 knot_packet_t *resp)
+{
+	assert(DNSSEC_ENABLED
+	       && knot_query_dnssec_requested(knot_packet_query(resp)));
+
+	// check if we have previous; if not, find one using the tree
+	if (previous == NULL) {		
+		previous = knot_zone_contents_find_previous(zone, qname);
+		
+		while (!knot_node_is_auth(previous)) {
+			previous = knot_node_previous(previous, 1);
+		}
+		
+		previous = knot_node_current(previous);
+		assert(previous != NULL);
+	}
+
+	const knot_rrset_t *rrset =
+		knot_node_rrset(previous, KNOT_RRTYPE_NSEC);
+	if (rrset != NULL) {
+		// NSEC proving that there is no node with the searched name
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+		rrset = knot_rrset_rrsigs(rrset);
+		assert(rrset != NULL);
+		knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs or NSEC3s for wildcard NODATA answer into the response.
+ *
+ * \note This function first checks if DNSSEC is enabled and requested by the
+ *       query.
+ *
+ * \param node Node used for answering.
+ * \param closest_encloser Closest encloser of \a qname in the zone.
+ * \param previous Previous node of \a qname in canonical order.
+ * \param zone Zone used for answering.
+ * \param qname Actual searched domain name.
+ * \param resp Response where to put the NSECs and NSEC3s.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec_nsec3_wildcard_nodata(const knot_node_t *node,
+                                          const knot_node_t *closest_encloser,
+                                          const knot_node_t *previous,
+                                          const knot_zone_contents_t *zone,
+                                          const knot_dname_t *qname,
+                                          knot_packet_t *resp)
+{
+	int ret = KNOT_EOK;
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))) {
+		if (knot_zone_contents_nsec3_enabled(zone)) {
+			ret = ns_put_nsec3_closest_encloser_proof(zone,
+			                                      &closest_encloser,
+			                                      qname, resp);
+
+			const knot_node_t *nsec3_node;
+			if (ret == KNOT_EOK
+			    && (nsec3_node = knot_node_nsec3_node(node, 1))
+			        != NULL) {
+				ns_put_nsec3_from_node(nsec3_node, resp);
+			}
+		} else {
+			ns_put_nsec_wildcard(zone, qname, previous, resp);
+		}
+	}
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Puts NSECs or NSEC3s for wildcard answer into the response.
+ *
+ * \note This function first checks if DNSSEC is enabled and requested by the
+ *       query and if the node's owner is a wildcard.
+ *
+ * \param node Node used for answering.
+ * \param closest_encloser Closest encloser of \a qname in the zone.
+ * \param previous Previous node of \a qname in canonical order.
+ * \param zone Zone used for answering.
+ * \param qname Actual searched domain name.
+ * \param resp Response where to put the NSECs and NSEC3s.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_put_nsec_nsec3_wildcard_answer(const knot_node_t *node,
+                                          const knot_node_t *closest_encloser,
+                                          const knot_node_t *previous,
+                                          const knot_zone_contents_t *zone,
+                                          const knot_dname_t *qname,
+                                          knot_packet_t *resp)
+{
+	int r = KNOT_EOK;
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))
+	    && knot_dname_is_wildcard(knot_node_owner(node))) {
+		if (knot_zone_contents_nsec3_enabled(zone)) {
+			r = ns_put_nsec3_wildcard(zone, closest_encloser, qname,
+			                          resp);
+		} else {
+			ns_put_nsec_wildcard(zone, qname, previous, resp);
+		}
+	}
+	return r;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a referral response.
+ *
+ * This function puts the delegation NS RRSet to the Authority section of the
+ * response, possibly adds DS and their associated RRSIGs (if DNSSEC is enabled
+ * and requested by the query) and adds any available additional data (A and
+ * AAAA RRSets for the names in the NS RRs) with their associated RRSIGs
+ * to the Additional section.
+ *
+ * \param node Delegation point node.
+ * \param zone Parent zone (the one from which the response is generated).
+ * \param qname Searched name (which caused the referral).
+ * \param resp Response.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static inline int ns_referral(const knot_node_t *node,
+                              const knot_zone_contents_t *zone,
+                              const knot_dname_t *qname,
+                              knot_packet_t *resp)
+{
+	dbg_ns("Referral response.\n");
+
+	while (!knot_node_is_deleg_point(node)) {
+		assert(knot_node_parent(node, 1) != NULL);
+		node = knot_node_parent(node, 1);
+	}
+
+	const knot_rrset_t *rrset = knot_node_rrset(node, KNOT_RRTYPE_NS);
+	assert(rrset != NULL);
+
+	// TODO: wildcards??
+	//ns_check_wildcard(name, resp, &rrset);
+
+	knot_response_add_rrset_authority(resp, rrset, 1, 0, 0);
+	ns_add_rrsigs(rrset, resp, node->owner,
+	              knot_response_add_rrset_authority, 1);
+
+	int ret = KNOT_EOK;
+	// add DS records
+	dbg_ns("DNSSEC requested: %d\n",
+		 knot_query_dnssec_requested(knot_packet_query(resp)));
+	dbg_ns("DS records: %p\n", knot_node_rrset(node, KNOT_RRTYPE_DS));
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))) {
+		rrset = knot_node_rrset(node, KNOT_RRTYPE_DS);
+		if (rrset != NULL) {
+			knot_response_add_rrset_authority(resp, rrset, 1, 0,
+			                                    0);
+			ns_add_rrsigs(rrset, resp, node->owner,
+			              knot_response_add_rrset_authority, 1);
+		} else {
+			// no DS, add NSEC3 or NSEC
+			// if NSEC3 enabled, search for NSEC3
+			if (knot_zone_contents_nsec3_enabled(zone)) {
+				const knot_node_t *nsec3_node =
+					knot_node_nsec3_node(node, 1);
+				dbg_ns("There is no DS, putting NSEC3s...\n");
+				if (nsec3_node != NULL) {
+					dbg_ns("Putting NSEC3s from the node.\n");
+					ns_put_nsec3_from_node(nsec3_node, resp);
+				} else {
+					dbg_ns("Putting Opt-Out NSEC3s.\n");
+					// no NSEC3 (probably Opt-Out)
+					// TODO: check if the zone is Opt-Out
+					ret = ns_put_nsec3_closest_encloser_proof(zone,
+						&node, qname, resp);
+				}
+			} else {
+				const knot_rrset_t *nsec = knot_node_rrset(
+					node, KNOT_RRTYPE_NSEC);
+				if (nsec) {
+					/*! \todo Check return value? */
+					knot_response_add_rrset_authority(
+						resp, nsec, 1, 1, 0);
+					if ((nsec = knot_rrset_rrsigs(nsec)) != NULL) {
+						knot_response_add_rrset_authority(resp, nsec, 1,
+										     1, 0);
+					}
+				}
+			}
+		}
+	}
+
+	if (ret == KNOT_EOK) {
+		ns_put_additional(resp);
+		knot_response_set_rcode(resp, KNOT_RCODE_NOERROR);
+	}
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Tries to answer the query from the given node.
+ *
+ * Tries to put RRSets of requested type (\a qtype) to the Answer section of the
+ * response. If successful, it also adds authority NS RRSet to the Authority
+ * section and it may add NSEC or NSEC3s in case of a wildcard answer (\a node
+ * is a wildcard node). If not successful (there are no such RRSets), it adds
+ * the SOA record to the Authority section and may add NSEC or NSEC3s according
+ * to the type of the response (NXDOMAIN if \a node is an empty non-terminal,
+ * NODATA if it is a regular node). It also adds any additional data that may
+ * be required.
+ *
+ * \param node Node to answer from.
+ * \param closest_encloser Closest encloser of \a qname in the zone.
+ * \param previous Previous domain name of \a qname in canonical order.
+ * \param zone Zone used for answering.
+ * \param qname Searched domain name.
+ * \param qtype Searched RR type.
+ * \param resp Response.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_answer_from_node(const knot_node_t *node,
+                               const knot_node_t *closest_encloser,
+                               const knot_node_t *previous,
+                               const knot_zone_contents_t *zone,
+                               const knot_dname_t *qname, uint16_t qtype,
+                               knot_packet_t *resp)
+{
+	dbg_ns("Putting answers from found node to the response...\n");
+	int answers = ns_put_answer(node, qname, qtype, resp);
+
+	int ret = KNOT_EOK;
+	if (answers == 0) {  // if NODATA response, put SOA
+		if (knot_node_rrset_count(node) == 0
+		    && !knot_zone_contents_nsec3_enabled(zone)) {
+			// node is an empty non-terminal => NSEC for NXDOMAIN
+			//assert(knot_node_rrset_count(closest_encloser) > 0);
+			dbg_ns("Adding NSEC/NSEC3 for NXDOMAIN.\n");
+			ret = ns_put_nsec_nsec3_nxdomain(zone,
+				knot_node_previous(node, 1), closest_encloser,
+				qname, resp);
+		} else {
+			dbg_ns("Adding NSEC/NSEC3 for NODATA.\n");
+			ns_put_nsec_nsec3_nodata(node, resp);
+			if (knot_dname_is_wildcard(node->owner)) {
+				dbg_ns("Putting NSEC/NSEC3 for wildcard"
+				              " NODATA\n");
+				ret = ns_put_nsec_nsec3_wildcard_nodata(node,
+					closest_encloser, previous, zone, qname,
+					resp);
+			}
+		}
+		ns_put_authority_soa(zone, resp);
+	} else {  // else put authority NS
+		// if wildcard answer, add NSEC / NSEC3
+		dbg_ns("Adding NSEC/NSEC3 for wildcard answer.\n");
+		ret = ns_put_nsec_nsec3_wildcard_answer(node, closest_encloser,
+		                                  previous, zone, qname, resp);
+		ns_put_authority_ns(zone, resp);
+	}
+
+	if (ret == KNOT_EOK) {
+		ns_put_additional(resp);
+	}
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Synthetizes a CNAME RR from a DNAME.
+ *
+ * \param dname_rrset DNAME RRSet to synthetize from (only the first RR is
+ *                    used).
+ * \param qname Name to be used as the owner name of the synthetized CNAME.
+ *
+ * \return Synthetized CNAME RRset (this is a newly created RRSet, remember to
+ *         free it).
+ */
+static knot_rrset_t *ns_cname_from_dname(const knot_rrset_t *dname_rrset,
+                                           const knot_dname_t *qname)
+{
+	dbg_ns("Synthetizing CNAME from DNAME...\n");
+
+	// create new CNAME RRSet
+
+	knot_dname_t *owner = knot_dname_deep_copy(qname);
+	if (owner == NULL) {
+		return NULL;
+	}
+
+	knot_rrset_t *cname_rrset = knot_rrset_new(
+		owner, KNOT_RRTYPE_CNAME, KNOT_CLASS_IN, SYNTH_CNAME_TTL);
+
+	/* Release owner, as it's retained in rrset. */
+	knot_dname_release(owner);
+
+	if (cname_rrset == NULL) {
+		return NULL;
+	}
+
+	// replace last labels of qname with DNAME
+	knot_dname_t *cname = knot_dname_replace_suffix(qname,
+	      knot_dname_size(knot_rrset_owner(dname_rrset)),
+	      knot_rdata_get_item(knot_rrset_rdata(dname_rrset), 0)->dname);
+dbg_ns_exec(
+	char *name = knot_dname_to_str(cname);
+	dbg_ns("CNAME canonical name: %s.\n", name);
+	free(name);
+);
+	knot_rdata_t *cname_rdata = knot_rdata_new();
+	knot_rdata_item_t cname_rdata_item;
+	cname_rdata_item.dname = cname;
+	knot_rdata_set_items(cname_rdata, &cname_rdata_item, 1);
+
+	knot_rrset_add_rdata(cname_rrset, cname_rdata);
+
+	return cname_rrset;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks if the name created by replacing the owner of \a dname_rrset
+ *        in the \a qname by the DNAME's target would be longer than allowed.
+ *
+ * \param dname_rrset DNAME RRSet to be used for the check.
+ * \param qname Name whose part is to be replaced.
+ *
+ * \retval <>0 if the created domain name would be too long.
+ * \retval 0 otherwise.
+ */
+static int ns_dname_is_too_long(const knot_rrset_t *dname_rrset,
+                                const knot_dname_t *qname)
+{
+	// TODO: add function for getting DNAME target
+	if (knot_dname_label_count(qname)
+	        - knot_dname_label_count(knot_rrset_owner(dname_rrset))
+	        + knot_dname_label_count(knot_rdata_get_item(
+	                             knot_rrset_rdata(dname_rrset), 0)->dname)
+	        > KNOT_MAX_DNAME_LENGTH) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief DNAME processing.
+ *
+ * This function adds the DNAME RRSet (and possibly its associated RRSIGs to the
+ * Answer section of the response, synthetizes CNAME record from the DNAME and
+ * adds it there too. It also stores the synthetized CNAME in the temporary
+ * RRSets of the response.
+ *
+ * \param dname_rrset DNAME RRSet to use.
+ * \param qname Searched name.
+ * \param resp Response.
+ */
+static void ns_process_dname(const knot_rrset_t *dname_rrset,
+                             const knot_dname_t *qname,
+                             knot_packet_t *resp)
+{
+dbg_ns_exec(
+	char *name = knot_dname_to_str(knot_rrset_owner(dname_rrset));
+	dbg_ns("Processing DNAME for owner %s...\n", name);
+	free(name);
+);
+	// TODO: check the number of RRs in the RRSet??
+
+	// put the DNAME RRSet into the answer
+	knot_response_add_rrset_answer(resp, dname_rrset, 1, 0, 0);
+	ns_add_rrsigs(dname_rrset, resp, qname,
+	              knot_response_add_rrset_answer, 1);
+
+	if (ns_dname_is_too_long(dname_rrset, qname)) {
+		knot_response_set_rcode(resp, KNOT_RCODE_YXDOMAIN);
+		return;
+	}
+
+	// synthetize CNAME (no way to tell that client supports DNAME)
+	knot_rrset_t *synth_cname = ns_cname_from_dname(dname_rrset, qname);
+	// add the synthetized RRSet to the Answer
+	knot_response_add_rrset_answer(resp, synth_cname, 1, 0, 0);
+
+	// no RRSIGs for this RRSet
+
+	// add the synthetized RRSet into list of temporary RRSets of response
+	knot_packet_add_tmp_rrset(resp, synth_cname);
+
+	// do not search for the name in new zone (out-of-bailiwick)
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adds DNSKEY RRSet from the apex of a zone to the response.
+ *
+ * \param apex Zone apex node.
+ * \param resp Response.
+ */
+static void ns_add_dnskey(const knot_node_t *apex, knot_packet_t *resp)
+{
+	const knot_rrset_t *rrset =
+		knot_node_rrset(apex, KNOT_RRTYPE_DNSKEY);
+	if (rrset != NULL) {
+		knot_response_add_rrset_additional(resp, rrset, 0, 0, 0);
+		ns_add_rrsigs(rrset, resp, apex->owner,
+			      knot_response_add_rrset_additional, 0);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Answers the query from the given zone.
+ *
+ * This function performs the actual answering logic.
+ *
+ * \param zone Zone to use for answering.
+ * \param qname QNAME from the query.
+ * \param qtype QTYPE from the query.
+ * \param resp Response to fill in.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ *
+ * \todo Describe the answering logic in detail.
+ */
+static int ns_answer_from_zone(const knot_zone_contents_t *zone,
+                               const knot_dname_t *qname, uint16_t qtype,
+                               knot_packet_t *resp)
+{
+	const knot_node_t *node = NULL, *closest_encloser = NULL,
+	                    *previous = NULL;
+	int cname = 0, auth_soa = 0, ret = 0, find_ret = 0;
+
+search:
+#ifdef USE_HASH_TABLE
+	/*! \todo Check version. */
+	find_ret = knot_zone_contents_find_dname_hash(zone, qname, &node,
+	                                                &closest_encloser);
+//	node = knot_node_current(node);
+//	closest_encloser = knot_node_current(closest_encloser);
+#else
+	/*! \todo Check version. */
+	find_ret = knot_zone_contents_find_dname(zone, qname, &node,
+	                                          &closest_encloser, &previous);
+	node = knot_node_current(node);
+	closest_encloser = knot_node_current(closest_encloser);
+	previous = knot_node_current(previous);
+#endif
+	if (find_ret == KNOT_EBADARG) {
+		return NS_ERR_SERVFAIL;
+	}
+
+dbg_ns_exec(
+	char *name;
+	if (node) {
+		name = knot_dname_to_str(node->owner);
+		dbg_ns("zone_find_dname() returned node %s ", name);
+		free(name);
+	} else {
+		dbg_ns("zone_find_dname() returned no node,");
+	}
+
+	if (closest_encloser != NULL) {
+		name = knot_dname_to_str(closest_encloser->owner);
+		dbg_ns(" closest encloser %s.\n", name);
+		free(name);
+	} else {
+		dbg_ns(" closest encloser (nil).\n");
+	}
+	if (previous != NULL) {
+		name = knot_dname_to_str(previous->owner);
+		dbg_ns(" and previous node: %s.\n", name);
+		free(name);
+	} else {
+		dbg_ns(" and previous node: (nil).\n");
+	}
+);
+	if (find_ret == KNOT_EBADZONE) {
+		// possible only if we followed cname
+		assert(cname != 0);
+		knot_response_set_rcode(resp, KNOT_RCODE_NOERROR);
+		auth_soa = 1;
+		knot_response_set_aa(resp);
+		goto finalize;
+	}
+
+have_node:
+	dbg_ns("Closest encloser is deleg. point? %s\n",
+		 (knot_node_is_deleg_point(closest_encloser)) ? "yes" : "no");
+
+	dbg_ns("Closest encloser is non authoritative? %s\n",
+		 (knot_node_is_non_auth(closest_encloser)) ? "yes" : "no");
+
+	if (knot_node_is_deleg_point(closest_encloser)
+	    || knot_node_is_non_auth(closest_encloser)) {
+		ret = ns_referral(closest_encloser, zone, qname, resp);
+		goto finalize;
+	}
+
+	if (find_ret == KNOT_ZONE_NAME_NOT_FOUND) {
+		// DNAME?
+		const knot_rrset_t *dname_rrset = knot_node_rrset(
+		                         closest_encloser, KNOT_RRTYPE_DNAME);
+		if (dname_rrset != NULL) {
+			ns_process_dname(dname_rrset, qname, resp);
+			auth_soa = 1;
+			knot_response_set_aa(resp);
+			goto finalize;
+		}
+		// else check for a wildcard child
+		const knot_node_t *wildcard_node =
+			knot_node_wildcard_child(closest_encloser, 1);
+
+		if (wildcard_node == NULL) {
+			dbg_ns("No wildcard node. (cname: %d)\n",
+				 cname);
+			auth_soa = 1;
+			if (cname == 0) {
+				dbg_ns("Setting NXDOMAIN RCODE.\n");
+				// return NXDOMAIN
+				knot_response_set_rcode(resp,
+					KNOT_RCODE_NXDOMAIN);
+				if (ns_put_nsec_nsec3_nxdomain(zone, previous,
+					closest_encloser, qname, resp) != 0) {
+					return NS_ERR_SERVFAIL;
+				}
+			} else {
+				knot_response_set_rcode(resp,
+					KNOT_RCODE_NOERROR);
+			}
+			knot_response_set_aa(resp);
+			goto finalize;
+		}
+		// else set the node from which to take the answers to wild.node
+		node = wildcard_node;
+	}
+
+	// now we have the node for answering
+	if (knot_node_is_deleg_point(node) || knot_node_is_non_auth(node)) {
+		ret = ns_referral(node, zone, qname, resp);
+		goto finalize;
+	}
+
+	if (knot_node_rrset(node, KNOT_RRTYPE_CNAME) != NULL) {
+dbg_ns_exec(
+		char *name = knot_dname_to_str(node->owner);
+		dbg_ns("Node %s has CNAME record, resolving...\n",
+		         name);
+		free(name);
+);
+		const knot_dname_t *act_name = qname;
+		ns_follow_cname(&node, &act_name, resp,
+		                knot_response_add_rrset_answer, 1);
+dbg_ns_exec(
+		char *name = (node != NULL) ? knot_dname_to_str(node->owner)
+			: "(nil)";
+		char *name2 = knot_dname_to_str(act_name);
+		dbg_ns("Canonical name: %s (%p), node found: %p\n",
+			 name2, act_name, node);
+		dbg_ns("The node's owner: %s (%p)\n", name, (node != NULL)
+		       ? node->owner : NULL);
+		if (node != NULL) {
+			free(name);
+		}
+		free(name2);
+);
+		qname = act_name;
+		cname = 1;
+
+		// otherwise search for the new name
+		if (node == NULL) {
+			goto search;
+		} else if (node->owner != act_name) {
+			// the stored node is closest encloser
+			find_ret = KNOT_ZONE_NAME_NOT_FOUND;
+			closest_encloser = node;
+			node = NULL;
+			goto have_node;
+		} // else do nothing, just continue
+	}
+
+	ret = ns_answer_from_node(node, closest_encloser, previous, zone, qname,
+	                          qtype, resp);
+	if (ret == NS_ERR_SERVFAIL) {
+		// in this case we should drop the response and send an error
+		// for now, just send the error code with a non-complete answer
+//		knot_response_set_rcode(resp, KNOT_RCODE_SERVFAIL);
+//		goto finalize;
+		return ret;
+	} else if (ret != KNOT_EOK) {
+		/*! \todo Handle RCODE return values!!! */
+		goto finalize;
+	}
+	knot_response_set_aa(resp);
+	knot_response_set_rcode(resp, KNOT_RCODE_NOERROR);
+
+	// this is the only case when the servers answers from
+	// particular node, i.e. the only case when it may return SOA
+	// or NS records in Answer section
+	if (DNSSEC_ENABLED
+	    && knot_query_dnssec_requested(knot_packet_query(resp))
+	    && node == knot_zone_contents_apex(zone)
+	    && (qtype == KNOT_RRTYPE_SOA || qtype == KNOT_RRTYPE_NS)) {
+		ns_add_dnskey(node, resp);
+	}
+
+finalize:
+	if (ret == KNOT_EOK && auth_soa) {
+		ns_put_authority_soa(zone, resp);
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Answers the query from the given zone database.
+ *
+ * First it searches for a zone to answer from. If there is none, it sets
+ * RCODE REFUSED to the response and ends. Otherwise it tries to answer the
+ * query using the found zone (see ns_answer_from_zone()).
+ *
+ * \param db Zone database to use for answering.
+ * \param resp Response that holds the parsed query.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_answer(knot_zonedb_t *db, knot_packet_t *resp)
+{
+	const knot_dname_t *qname = knot_packet_qname(resp);
+	assert(qname != NULL);
+
+	uint16_t qtype = knot_packet_qtype(resp);
+dbg_ns_exec(
+	char *name_str = knot_dname_to_str(qname);
+	dbg_ns("Trying to find zone for QNAME %s\n", name_str);
+	free(name_str);
+);
+	// find zone in which to search for the name
+	const knot_zone_t *zone =
+		ns_get_zone_for_qname(db, qname, qtype);
+	const knot_zone_contents_t *contents = knot_zone_contents(zone);
+
+	// if no zone found, return REFUSED
+	if (zone == NULL) {
+		dbg_ns("No zone found.\n");
+		knot_response_set_rcode(resp, KNOT_RCODE_REFUSED);
+		//knot_dname_free(&qname);
+		return KNOT_EOK;
+	} else if (contents == NULL) {
+		dbg_ns("Zone expired or not bootstrapped. Reply SERVFAIL.\n");
+		knot_response_set_rcode(resp, KNOT_RCODE_SERVFAIL);
+		return KNOT_EOK;
+	}
+
+dbg_ns_exec(
+	char *name_str2 = knot_dname_to_str(zone->contents->apex->owner);
+	dbg_ns("Found zone for QNAME %s\n", name_str2);
+	free(name_str2);
+);
+
+	// take the zone contents and use only them for answering
+
+	return ns_answer_from_zone(contents, qname, qtype, resp);
+
+	//knot_dname_free(&qname);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Converts the response to wire format.
+ *
+ * \param resp Response to convert.
+ * \param wire Place for the wire format of the response.
+ * \param wire_size In: space available for the wire format in bytes.
+ *                  Out: actual size of the wire format in bytes.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_response_to_wire(knot_packet_t *resp, uint8_t *wire,
+                               size_t *wire_size)
+{
+	uint8_t *rwire = NULL;
+	size_t rsize = 0;
+	int ret = 0;
+
+	if ((ret = knot_packet_to_wire(resp, &rwire, &rsize))
+	     != KNOT_EOK) {
+		dbg_ns("Error converting response packet "
+		                 "to wire format (error %d).\n", ret);
+		return NS_ERR_SERVFAIL;
+	}
+
+	if (rsize > *wire_size) {
+		dbg_ns("Reponse size (%zu) larger than allowed wire size "
+		         "(%zu).\n", rsize, *wire_size);
+		return NS_ERR_SERVFAIL;
+	}
+
+	if (rwire != wire) {
+		dbg_ns("Wire format reallocated, copying to place for "
+		              "wire.\n");
+		memcpy(wire, rwire, rsize);
+	} else {
+		dbg_ns("Using the same space or wire format.\n");
+	}
+	
+	*wire_size = rsize;
+	//free(rwire);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a wire format of an error response from partially created
+ *        response.
+ *
+ * \param resp Response to use.
+ * \param wire Place for the wire format of the response.
+ * \param wire_size In: space available for the wire format in bytes.
+ *                  Out: actual size of the wire format in bytes.
+ *
+ * \retval KNOT_EOK
+ * \retval NS_ERR_SERVFAIL
+ */
+static int ns_error_response_to_wire(knot_packet_t *resp, uint8_t *wire,
+                                     size_t *wire_size)
+{
+	/* Do not call the packet conversion function
+	 * wire format is assembled, but COUNTs in header are not set.
+	 * This is ideal, we just truncate the packet after the question.
+	 */
+	dbg_ns("Creating error response.\n");
+	
+	size_t rsize = knot_packet_question_size(knot_packet_query(resp));
+	dbg_ns("Error response (~ query) size: %zu\n", rsize);
+
+	// take 'qsize' from the current wireformat of the response
+	// it is already assembled - Header and Question section are copied
+	const uint8_t *rwire = knot_packet_wireformat(resp);
+	if (rsize > *wire_size) {
+		dbg_ns("Reponse size (%zu) larger than allowed wire size"
+		         " (%zu).\n", rsize, *wire_size);
+		return NS_ERR_SERVFAIL;
+	}
+
+	assert(rwire != wire);
+	
+	/*! \todo Why is this copied?? Why we cannot use resp->wireformat?? */
+	memcpy(wire, rwire, rsize);
+
+	*wire_size = rsize;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct ns_axfr_params {
+	knot_ns_xfr_t *xfr;
+	int ret;
+} ns_axfr_params_t;
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_tsig_required(int packet_nr) 
+{
+	dbg_ns_detail("ns_tsig_required(%d): %d\n", packet_nr,
+	              (packet_nr % KNOT_NS_TSIG_FREQ == 0));
+	return (packet_nr % KNOT_NS_TSIG_FREQ == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_xfr_send_and_clear(knot_ns_xfr_t *xfr, int add_tsig)
+{
+	assert(xfr != NULL);
+	assert(xfr->query != NULL);
+	assert(xfr->response != NULL);
+	assert(xfr->wire != NULL);
+	assert(xfr->send != NULL);
+
+	// Transform the packet into wire format
+	dbg_ns("Converting response to wire format..\n");
+	size_t real_size = xfr->wire_size;
+	if (ns_response_to_wire(xfr->response, xfr->wire, &real_size) != 0) {
+		return NS_ERR_SERVFAIL;
+//		// send back SERVFAIL (as this is our problem)
+//		ns_error_response(nameserver,
+//				  knot_wire_get_id(query_wire),
+//				  KNOT_RCODE_SERVFAIL, response_wire,
+//				  rsize);
+	}
+	
+	int res = 0;
+	
+	size_t digest_real_size = xfr->digest_max_size;
+	
+	dbg_ns_detail("xfr->tsig_key=%p\n", xfr->tsig_key);
+	/*! \note [TSIG] Generate TSIG if required (during XFR/IN). */
+	if (xfr->tsig_key && add_tsig) {
+		if (xfr->packet_nr == 0) {
+			/* Add key, digest and digest length. */
+			dbg_ns_detail("Calling tsig_sign(): %p, %zu, %zu, "
+				      "%p, %zu, %p, %zu, %p\n",
+				      xfr->wire, real_size, xfr->wire_size,
+				      xfr->digest, xfr->digest_size, xfr->digest,
+				      digest_real_size, xfr->tsig_key);
+			res = knot_tsig_sign(xfr->wire, &real_size,
+			               xfr->wire_size, xfr->digest, 
+			               xfr->digest_size, xfr->digest, 
+			               &digest_real_size,
+			               xfr->tsig_key);
+		} else {
+			/* Add key, digest and digest length. */
+			dbg_ns_detail("Calling tsig_sign_next()\n");
+			res = knot_tsig_sign_next(xfr->wire, &real_size,
+			                          xfr->wire_size, 
+			                          xfr->digest,
+			                          xfr->digest_size,
+			                          xfr->digest, 
+			                          &digest_real_size,
+			                          xfr->tsig_key);
+		}
+
+		dbg_ns_detail("Sign function returned: %s\n",
+			      knot_strerror(res));
+		dbg_ns_detail("Real size of digest: %zu\n", digest_real_size);
+
+		if (res != KNOT_EOK) {
+			return res;
+		}
+	
+		assert(digest_real_size > 0);
+		// save the new previous digest size
+		xfr->digest_size = digest_real_size;
+	}
+
+	// Send the response
+	dbg_ns("Sending response (size %zu)..\n", real_size);
+	//dbg_ns_hex((const char *)xfr->wire, real_size);
+	res = xfr->send(xfr->session, &xfr->addr, xfr->wire, real_size);
+	if (res < 0) {
+		dbg_ns("Send returned %d\n", res);
+		return res;
+	} else if (res != real_size) {
+		dbg_ns("AXFR did not send right amount of bytes."
+		                   " Transfer size: %zu, sent: %d\n",
+		                   real_size, res);
+	}
+
+	// Clean the response structure
+	dbg_ns("Clearing response structure..\n");
+	knot_response_clear(xfr->response, 0);
+	
+	// increment the packet number
+	++xfr->packet_nr;
+	if (xfr->tsig_key && add_tsig) {
+		knot_packet_set_tsig_size(xfr->response, xfr->tsig_size);
+	} else {
+		knot_packet_set_tsig_size(xfr->response, 0);
+	}
+
+	dbg_ns("Response structure after clearing:\n");
+	knot_packet_dump(xfr->response);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void ns_axfr_from_node(knot_node_t *node, void *data)
+{
+	assert(node != NULL);
+	assert(data != NULL);
+
+	ns_axfr_params_t *params = (ns_axfr_params_t *)data;
+
+	if (params->ret != KNOT_EOK) {
+		// just skip (will be called on next node with the same params
+		dbg_ns("Params contain error: %s, skipping node...\n",
+		              knot_strerror(params->ret));
+		return;
+	}
+
+	dbg_ns("Params OK, answering AXFR from node %p.\n", node);
+dbg_ns_exec(
+	char *name = knot_dname_to_str(knot_node_owner(node));
+	dbg_ns("Node ownerr: %s\n", name);
+	free(name);
+);
+
+	if (knot_node_rrset_count(node) == 0) {
+		return;
+	}
+
+	const knot_rrset_t **rrsets = knot_node_rrsets(node);
+	if (rrsets == NULL) {
+		params->ret = KNOT_ENOMEM;
+		return;
+	}
+
+	int i = 0;
+	int ret = 0;
+	const knot_rrset_t *rrset = NULL;
+	while (i < knot_node_rrset_count(node)) {
+		assert(rrsets[i] != NULL);
+		rrset = rrsets[i];
+rrset:
+		dbg_ns("  Type: %s\n",
+		     knot_rrtype_to_string(knot_rrset_type(rrset)));
+
+		// do not add SOA
+		if (knot_rrset_type(rrset) == KNOT_RRTYPE_SOA) {
+			++i;
+			continue;
+		}
+
+		ret = knot_response_add_rrset_answer(params->xfr->response,
+		                                       rrset, 0, 0, 1);
+
+		if (ret == KNOT_ESPACE) {
+			// TODO: send the packet and clean the structure
+			dbg_ns("Packet full, sending..\n");
+			ret = ns_xfr_send_and_clear(params->xfr, 
+				knot_ns_tsig_required(params->xfr->packet_nr));
+			if (ret != KNOT_EOK) {
+				// some wierd problem, we should end
+				params->ret = KNOT_ERROR;
+				break;
+			}
+			// otherwise try once more with the same RRSet
+			goto rrset;
+		} else if (ret != KNOT_EOK) {
+			// some wierd problem, we should end
+			params->ret = KNOT_ERROR;
+			break;
+		}
+
+		// we can send the RRSets in any order, so add the RRSIGs now
+		rrset = knot_rrset_rrsigs(rrset);
+rrsigs:
+		if (rrset == NULL) {
+			++i;
+			continue;
+		}
+
+		ret = knot_response_add_rrset_answer(params->xfr->response,
+		                                        rrset, 0, 0, 1);
+
+		if (ret == KNOT_ESPACE) {
+			// TODO: send the packet and clean the structure
+			dbg_ns("Packet full, sending..\n");
+			ret = ns_xfr_send_and_clear(params->xfr,
+				knot_ns_tsig_required(params->xfr->packet_nr));
+			if (ret != KNOT_EOK) {
+				// some wierd problem, we should end
+				params->ret = KNOT_ERROR;
+				break;
+			}
+			// otherwise try once more with the same RRSet
+			goto rrsigs;
+		} else if (ret != KNOT_EOK) {
+			// some wierd problem, we should end
+			params->ret = KNOT_ERROR;
+			break;
+		}
+
+		// this way only whole RRSets are always sent
+		// we guess it will not create too much overhead
+
+		++i;
+	}
+	if (rrsets != NULL) {
+		free(rrsets);
+	}
+
+	/*! \todo maybe distinguish some error codes. */
+	//params->ret = (ret == 0) ? KNOT_EOK : KNOT_ERROR;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_axfr_from_zone(knot_zone_contents_t *zone, knot_ns_xfr_t *xfr)
+{
+	assert(xfr != NULL);
+	assert(xfr->query != NULL);
+	assert(xfr->response != NULL);
+	assert(xfr->wire != NULL);
+	assert(xfr->send != NULL);
+
+	ns_axfr_params_t params;
+	memset(&params, 0, sizeof(ns_axfr_params_t));
+	params.xfr = xfr;
+	params.ret = KNOT_EOK;
+
+	xfr->packet_nr = 0;
+	
+	/*
+	 * First SOA
+	 */
+
+	// retrieve SOA - must be send as first and last RR
+	const knot_rrset_t *soa_rrset = knot_node_rrset(
+		knot_zone_contents_apex(zone), KNOT_RRTYPE_SOA);
+	if (soa_rrset == NULL) {
+		// some really serious error
+		return KNOT_ERROR;
+	}
+
+	int ret;
+
+	// add SOA RR to the response
+	ret = knot_response_add_rrset_answer(xfr->response, soa_rrset, 0, 0, 1);
+	if (ret != KNOT_EOK) {
+		// something is really wrong
+		return KNOT_ERROR;
+	}
+
+	// add the SOA's RRSIG
+	const knot_rrset_t *rrset = knot_rrset_rrsigs(soa_rrset);
+	if (rrset != NULL
+	    && (ret = knot_response_add_rrset_answer(xfr->response, rrset,
+	                                              0, 0, 1)) != KNOT_EOK) {
+		// something is really wrong, these should definitely fit in
+		return KNOT_ERROR;
+	}
+
+	knot_zone_contents_tree_apply_inorder(zone, ns_axfr_from_node,
+	                                        &params);
+
+	if (params.ret != KNOT_EOK) {
+		return KNOT_ERROR;	// maybe do something with the code
+	}
+
+	knot_zone_contents_nsec3_apply_inorder(zone, ns_axfr_from_node,
+	                                         &params);
+
+	if (params.ret != KNOT_EOK) {
+		return KNOT_ERROR;	// maybe do something with the code
+	}
+
+	/*
+	 * Last SOA
+	 */
+
+	// try to add the SOA to the response again (last RR)
+	ret = knot_response_add_rrset_answer(xfr->response, soa_rrset, 0, 0, 1);
+	if (ret == KNOT_ESPACE) {
+			
+		// if there is not enough space, send the response and
+		// add the SOA record to a new packet
+		dbg_ns("Packet full, sending..\n");
+		ret = ns_xfr_send_and_clear(xfr,
+			knot_ns_tsig_required(xfr->packet_nr));
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+
+		ret = knot_response_add_rrset_answer(xfr->response,
+		                                        soa_rrset, 0, 0, 1);
+		if (ret != KNOT_EOK) {
+			return KNOT_ERROR;
+		}
+
+	} else if (ret != KNOT_EOK) {
+		// something is really wrong
+		return KNOT_ERROR;
+	}
+
+	dbg_ns("Sending packet...\n");
+	return ns_xfr_send_and_clear(xfr, 1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_ixfr_put_rrset(knot_ns_xfr_t *xfr, const knot_rrset_t *rrset)
+{
+	int res = knot_response_add_rrset_answer(xfr->response, rrset,
+	                                            0, 0, 0);
+	if (res == KNOT_ESPACE) {
+		knot_response_set_rcode(xfr->response, KNOT_RCODE_NOERROR);
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, knot_ns_tsig_required(xfr->packet_nr));
+
+		res = knot_response_add_rrset_answer(xfr->response,
+		                                        rrset, 0, 0, 0);
+	}
+
+	if (res != KNOT_EOK) {
+		dbg_ns("Error putting origin SOA to IXFR reply: %s\n",
+			 knot_strerror(res));
+		/*! \todo Probably send back AXFR instead. */
+		knot_response_set_rcode(xfr->response,
+		                           KNOT_RCODE_SERVFAIL);
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, 1);
+		//socket_close(xfr->session);  /*! \todo Remove for UDP.*/
+		return KNOT_ERROR;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_ixfr_put_changeset(knot_ns_xfr_t *xfr, const knot_changeset_t *chgset)
+{
+	// 1) put origin SOA
+	int res = ns_ixfr_put_rrset(xfr, chgset->soa_from);
+	if (res != KNOT_EOK) {
+		return res;
+	}
+
+	// 2) put remove RRSets
+	for (int i = 0; i < chgset->remove_count; ++i) {
+		res = ns_ixfr_put_rrset(xfr, chgset->remove[i]);
+		if (res != KNOT_EOK) {
+			return res;
+		}
+	}
+
+	// 1) put target SOA
+	res = ns_ixfr_put_rrset(xfr, chgset->soa_to);
+	if (res != KNOT_EOK) {
+		return res;
+	}
+
+	// 2) put remove RRSets
+	for (int i = 0; i < chgset->add_count; ++i) {
+		res = ns_ixfr_put_rrset(xfr, chgset->add[i]);
+		if (res != KNOT_EOK) {
+			return res;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_ixfr_from_zone(knot_ns_xfr_t *xfr)
+{
+	assert(xfr != NULL);
+	assert(xfr->zone != NULL);
+	assert(xfr->query != NULL);
+	assert(xfr->response != NULL);
+	assert(knot_packet_authority_rrset_count(xfr->query) > 0);
+	assert(xfr->data != NULL);
+
+	/*! \todo REMOVE start */
+//	const knot_rrset_t *zone_soa =
+//		knot_node_rrset(knot_zone_contents_apex(
+//		                       knot_zone_contents(xfr->zone)),
+//		                  KNOT_RRTYPE_SOA);
+//	// retrieve origin (xfr) serial and target (zone) serial
+//	uint32_t zone_serial = knot_rdata_soa_serial(
+//	                             knot_rrset_rdata(zone_soa));
+//	uint32_t xfr_serial = knot_rdata_soa_serial(knot_rrset_rdata(
+//			knot_packet_authority_rrset(xfr->query, 0)));
+
+//	// 3) load changesets from journal
+//	knot_changesets_t *chgsets = (knot_changesets_t *)
+//	                               calloc(1, sizeof(knot_changesets_t));
+//	int res = xfr_load_changesets(xfr->zone, chgsets, xfr_serial, 
+//	                              zone_serial);
+//	if (res != KNOT_EOK) {
+//		dbg_ns("IXFR query cannot be answered: %s.\n",
+//		         knot_strerror(res));
+//		/*! \todo Probably send back AXFR instead. */
+//		knot_response_set_rcode(xfr->response, KNOT_RCODE_SERVFAIL);
+//		/*! \todo Probably rename the function. */
+//		ns_axfr_send_and_clear(xfr);
+//		//socket_close(xfr->session);  /*! \todo Remove for UDP. */
+//		return 1;
+//	}
+	
+	/*! \todo REMOVE end */
+	
+	knot_changesets_t *chgsets = (knot_changesets_t *)xfr->data;
+	knot_zone_contents_t* contents = knot_zone_get_contents(xfr->zone);
+	assert(contents);
+	const knot_rrset_t *zone_soa =
+		knot_node_rrset(knot_zone_contents_apex(contents),
+				KNOT_RRTYPE_SOA);
+
+	// 4) put the zone SOA as the first Answer RR
+	int res = knot_response_add_rrset_answer(xfr->response, zone_soa, 0, 
+	                                            0, 0);
+	if (res != KNOT_EOK) {
+		dbg_ns("IXFR query cannot be answered: %s.\n",
+			 knot_strerror(res));
+		knot_response_set_rcode(xfr->response,
+		                           KNOT_RCODE_SERVFAIL);
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, 1);
+//		socket_close(xfr->session);  /*! \todo Remove for UDP.*/
+		return 1;
+	}
+
+	// 5) put the changesets into the response while they fit in
+	for (int i = 0; i < chgsets->count; ++i) {
+		res = ns_ixfr_put_changeset(xfr, &chgsets->sets[i]);
+		if (res != KNOT_EOK) {
+			// answer is sent, socket is closed
+			return KNOT_EOK;
+		}
+	}
+
+	if (chgsets->count > 0) {
+		res = ns_ixfr_put_rrset(xfr, zone_soa);
+	}
+
+	if (res == KNOT_EOK) {
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, 1);
+		//socket_close(xfr->session);  /*! \todo Remove for UDP.*/
+		return 1;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int ns_ixfr(knot_ns_xfr_t *xfr)
+{
+	assert(xfr != NULL);
+	assert(xfr->query != NULL);
+	assert(xfr->response != NULL);
+	assert(knot_packet_qtype(xfr->response) == KNOT_RRTYPE_IXFR);
+
+	// check if there is the required authority record
+	if ((knot_packet_authority_rrset_count(xfr->query) <= 0)) {
+		// malformed packet
+		dbg_ns("IXFR query does not contain authority record.\n");
+		knot_response_set_rcode(xfr->response, KNOT_RCODE_FORMERR);
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, 1);
+		//socket_close(xfr->session);
+		return 1;
+	}
+
+	const knot_rrset_t *soa = knot_packet_authority_rrset(xfr->query, 0);
+	const knot_dname_t *qname = knot_packet_qname(xfr->response);
+
+	// check if XFR QNAME and SOA correspond
+	if (knot_packet_qtype(xfr->query) != KNOT_RRTYPE_IXFR
+	    || knot_rrset_type(soa) != KNOT_RRTYPE_SOA
+	    || knot_dname_compare(qname, knot_rrset_owner(soa)) != 0) {
+		// malformed packet
+		dbg_ns("IXFR query is malformed.\n");
+		knot_response_set_rcode(xfr->response, KNOT_RCODE_FORMERR);
+		/*! \todo Probably rename the function. */
+		ns_xfr_send_and_clear(xfr, 1);
+		//socket_close(xfr->session);  /*! \todo Remove for UDP. */
+		return 1;
+	}
+
+	return ns_ixfr_from_zone(xfr);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ns_prepare_response(knot_nameserver_t *nameserver,
+                                    knot_packet_t *query, knot_packet_t **resp,
+                                    size_t max_size)
+{
+	assert(max_size >= 500);
+	
+	// initialize response packet structure
+	*resp = knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	if (*resp == NULL) {
+		dbg_ns("Failed to create packet structure.\n");
+		return KNOT_ENOMEM;
+	}
+
+	int ret = knot_packet_set_max_size(*resp, max_size);
+	//(*resp)->wireformat = response_wire;;
+	//(*resp)->max_size = max_size;
+
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to init response structure.\n");
+		knot_packet_free(resp);
+		return ret;
+	}
+
+	ret = knot_response_init_from_query(*resp, query);
+
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to init response structure.\n");
+		knot_packet_free(resp);
+		return ret;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int32_t ns_serial_difference(uint32_t s1, uint32_t s2)
+{
+	return (((int64_t)s1 - s2) % ((int64_t)1 << 32));
+}
+
+/*----------------------------------------------------------------------------*/
+/* Public functions                                                           */
+/*----------------------------------------------------------------------------*/
+
+knot_nameserver_t *knot_ns_create()
+{
+	knot_nameserver_t *ns = malloc(sizeof(knot_nameserver_t));
+	if (ns == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	ns->data = 0;
+
+	// Create zone database structure
+	dbg_ns("Creating Zone Database structure...\n");
+	ns->zone_db = knot_zonedb_new();
+	if (ns->zone_db == NULL) {
+		ERR_ALLOC_FAILED;
+		free(ns);
+		return NULL;
+	}
+
+	// prepare empty response with SERVFAIL error
+	knot_packet_t *err = knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	if (err == NULL) {
+		ERR_ALLOC_FAILED;
+		free(ns);
+		return NULL;
+	}
+
+	dbg_ns("Created default empty response...\n");
+
+	int rc = knot_packet_set_max_size(err, KNOT_WIRE_HEADER_SIZE);
+	if (rc != KNOT_EOK) {
+		dbg_ns("Error creating default error response: %s.\n",
+		                 knot_strerror(rc));
+		free(ns);
+		knot_packet_free(&err);
+		return NULL;
+	}
+
+	rc = knot_response_init(err);
+	if (rc != KNOT_EOK) {
+		dbg_ns("Error initializing default error response:"
+		                 " %s.\n", knot_strerror(rc));
+		free(ns);
+		knot_packet_free(&err);
+		return NULL;
+	}
+
+	knot_response_set_rcode(err, KNOT_RCODE_SERVFAIL);
+	ns->err_resp_size = 0;
+
+	dbg_ns("Converting default empty response to wire format...\n");
+
+	uint8_t *error_wire = NULL;
+
+	if (knot_packet_to_wire(err, &error_wire, &ns->err_resp_size) != 0) {
+		dbg_ns("Error while converting "
+		                 "default error response to "
+		                 "wire format \n");
+		knot_packet_free(&err);
+		free(ns);
+		return NULL;
+	}
+
+	ns->err_response = (uint8_t *)malloc(ns->err_resp_size);
+	if (ns->err_response == NULL) {
+		dbg_ns("Error while converting default "
+		                 "error response to wire format \n");
+		knot_packet_free(&err);
+		free(ns);
+		return NULL;
+	}
+
+	memcpy(ns->err_response, error_wire, ns->err_resp_size);
+
+	dbg_ns("Done..\n");
+
+	knot_packet_free(&err);
+
+	if (EDNS_ENABLED) {
+		ns->opt_rr = knot_edns_new();
+		if (ns->opt_rr == NULL) {
+			dbg_ns("Error while preparing OPT RR of the"
+			                 " server.\n");
+			knot_packet_free(&err);
+			free(ns);
+			return NULL;
+		}
+		knot_edns_set_version(ns->opt_rr, EDNS_VERSION);
+		knot_edns_set_payload(ns->opt_rr, MAX_UDP_PAYLOAD_EDNS);
+	} else {
+		ns->opt_rr = NULL;
+	}
+
+	knot_packet_free(&err);
+
+	return ns;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_parse_packet(const uint8_t *query_wire, size_t qsize,
+                    knot_packet_t *packet, knot_packet_type_t *type)
+{
+	if (packet == NULL || query_wire == NULL || type == NULL) {
+		dbg_ns("Missing parameter to query parsing.\n");
+		return KNOT_EBADARG;
+	}
+
+	dbg_ns("ns_parse_packet() called with query size %zu.\n", qsize);
+	//dbg_ns_hex((char *)query_wire, qsize);
+
+	if (qsize < 2) {
+		return KNOT_EMALF;
+	}
+
+	// 1) create empty response
+	dbg_ns("Parsing packet...\n");
+	//parsed = knot_response_new_empty(NULL);
+
+	int ret = 0;
+
+	if ((ret = knot_packet_parse_from_wire(packet, query_wire,
+	                                         qsize, 1)) != 0) {
+		dbg_ns("Error while parsing packet, "
+		                "libknot error '%s'.\n", knot_strerror(ret));
+//		knot_response_free(&parsed);
+		return KNOT_RCODE_FORMERR;
+	}
+
+	dbg_ns("Parsed packet header and Question:\n");
+	knot_packet_dump(packet);
+
+	// 3) determine the query type
+	switch (knot_packet_opcode(packet))  {
+	case KNOT_OPCODE_QUERY:
+		switch (knot_packet_qtype(packet)) {
+		case KNOT_RRTYPE_AXFR:
+			*type = (knot_packet_is_query(packet))
+			         ? KNOT_QUERY_AXFR : KNOT_RESPONSE_AXFR;
+			break;
+		case KNOT_RRTYPE_IXFR:
+			*type = (knot_packet_is_query(packet))
+			         ? KNOT_QUERY_IXFR : KNOT_RESPONSE_IXFR;
+			break;
+		default:
+			*type = (knot_packet_is_query(packet))
+			         ? KNOT_QUERY_NORMAL : KNOT_RESPONSE_NORMAL;
+		}
+
+		break;
+	case KNOT_OPCODE_NOTIFY:
+		*type = (knot_packet_is_query(packet))
+		         ? KNOT_QUERY_NOTIFY : KNOT_RESPONSE_NOTIFY;
+		break;
+	case KNOT_OPCODE_UPDATE:
+		if(knot_packet_is_query(packet)) {
+			*type = KNOT_QUERY_UPDATE;
+		} else {
+			return KNOT_RCODE_FORMERR;
+		}
+		break;
+	default:
+		return KNOT_RCODE_NOTIMPL;
+	}
+
+//	knot_packet_free(&packet);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_ns_error_response(const knot_nameserver_t *nameserver, uint16_t query_id,
+                       uint8_t rcode, uint8_t *response_wire, size_t *rsize)
+{
+	//dbg_ns("Error response: \n");
+	//dbg_ns_hex((const char *)nameserver->err_response,
+	//             nameserver->err_resp_size);
+
+	memcpy(response_wire, nameserver->err_response,
+	       nameserver->err_resp_size);
+	// copy ID of the query
+	knot_wire_set_id(response_wire, query_id);
+	// set the RCODE
+	knot_wire_set_rcode(response_wire, rcode);
+	*rsize = nameserver->err_resp_size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_ns_error_response_full(knot_nameserver_t *nameserver,
+                                 knot_packet_t *response, uint8_t rcode,
+                                 uint8_t *response_wire, size_t *rsize)
+{
+	knot_response_set_rcode(response, rcode);
+
+	if (ns_error_response_to_wire(response, response_wire, rsize) != 0) {
+		knot_ns_error_response(nameserver, knot_packet_id(
+		                       knot_packet_query(response)),
+		                       KNOT_RCODE_SERVFAIL, response_wire,
+		                       rsize);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_answer_normal(knot_nameserver_t *nameserver, knot_packet_t *query,
+                          uint8_t *response_wire, size_t *rsize)
+{
+	dbg_ns("ns_answer_normal()\n");
+
+	// first, parse the rest of the packet
+	assert(knot_packet_is_query(query));
+	dbg_ns("Query - parsed: %zu, total wire size: %zu\n",
+	              knot_packet_parsed(query), knot_packet_size(query));
+	int ret;
+
+	ret = knot_packet_parse_rest(query);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to parse rest of the query: "
+				   "%s.\n", knot_strerror(ret));
+		knot_ns_error_response(nameserver, knot_packet_id(query),
+				       (ret == KNOT_EMALF)
+					  ? KNOT_RCODE_FORMERR
+					  : KNOT_RCODE_SERVFAIL, response_wire,
+		                       rsize);
+		return KNOT_EOK;
+	}
+
+	/*
+	 * Semantic checks - if ANCOUNT > 0 or NSCOUNT > 0, return FORMERR.
+	 *
+	 * If any xxCOUNT is less or more than actual RR count
+	 * the previously called knot_packet_parse_rest() will recognize this.
+	 *
+	 * Check the QDCOUNT and in case of anything but 1 send back
+	 * FORMERR
+	 */
+	if (knot_packet_ancount(query) > 0
+	    || knot_packet_nscount(query) > 0
+	    || knot_packet_qdcount(query) != 1) {
+		dbg_ns("ANCOUNT or NSCOUNT not 0 in query, reply FORMERR.\n");
+		knot_ns_error_response(nameserver, knot_packet_id(query),
+		                       KNOT_RCODE_FORMERR, response_wire,
+		                       rsize);
+		return KNOT_EOK;
+	}
+
+	size_t resp_max_size = 0;
+	
+	assert(*rsize >= MAX_UDP_PAYLOAD);
+
+	knot_packet_dump(query);
+	
+	if (knot_query_edns_supported(query)) {
+		if (knot_edns_get_payload(&query->opt_rr) <
+		    knot_edns_get_payload(nameserver->opt_rr)) {
+			resp_max_size = knot_edns_get_payload(&query->opt_rr);
+		} else {
+			resp_max_size = knot_edns_get_payload(
+						nameserver->opt_rr);
+		}
+	}
+	
+	if (resp_max_size < MAX_UDP_PAYLOAD) {
+		resp_max_size = MAX_UDP_PAYLOAD;
+	}
+	
+	knot_packet_t *response;
+	ret = knot_ns_prepare_response(nameserver, query, &response, 
+	                               resp_max_size);
+	if (ret != KNOT_EOK) {
+		knot_ns_error_response(nameserver, knot_packet_id(query),
+		                       KNOT_RCODE_SERVFAIL, response_wire,
+		                       rsize);
+		return KNOT_EOK;
+	}
+
+	dbg_ns("Query - parsed: %zu, total wire size: %zu\n", 
+	              query->parsed, query->size);
+	dbg_ns("Opt RR: version: %d, payload: %d\n", 
+	              query->opt_rr.version, query->opt_rr.payload);
+
+	// get the answer for the query
+	rcu_read_lock();
+	knot_zonedb_t *zonedb = rcu_dereference(nameserver->zone_db);
+
+	dbg_ns("EDNS supported in query: %d\n",
+	         knot_query_edns_supported(query));
+
+	// set the OPT RR to the response
+	if (knot_query_edns_supported(query)) {
+		/*! \todo API. */
+//		if (knot_edns_get_payload(&query->opt_rr) > MAX_UDP_PAYLOAD) {
+//			ret = knot_packet_set_max_size(response, 
+//				knot_edns_get_payload(&query->opt_rr));
+//		} else {
+//			ret = knot_packet_set_max_size(response, 
+//			                               MAX_UDP_PAYLOAD);
+//		}
+		
+//		if (ret != KNOT_EOK) {
+//			dbg_ns("Failed to set max size.\n");
+//			knot_ns_error_response_full(nameserver, response,
+//			                            KNOT_RCODE_SERVFAIL,
+//			                            response_wire, rsize);
+//			return KNOT_EOK;
+//		}
+		
+		ret = knot_response_add_opt(response, nameserver->opt_rr, 1);
+		if (ret != KNOT_EOK) {
+			dbg_ns("Failed to set OPT RR to the response"
+			                  ": %s\n",knot_strerror(ret));
+		} else {
+			// copy the DO bit from the query
+			if (knot_query_dnssec_requested(query)) {
+				/*! \todo API for this. */
+				knot_edns_set_do(&response->opt_rr);
+			}
+		}
+	}/* else {
+		dbg_ns("Setting max size to %u.\n", MAX_UDP_PAYLOAD);
+		ret = knot_packet_set_max_size(response, MAX_UDP_PAYLOAD);
+		if (ret != KNOT_EOK) {
+			dbg_ns("Failed to set max size to %u\n",
+			              MAX_UDP_PAYLOAD);
+			knot_ns_error_response_full(nameserver, response,
+			                            KNOT_RCODE_SERVFAIL,
+			                            response_wire, rsize);
+			return KNOT_EOK;
+		}
+	}*/
+	
+	dbg_ns("Response max size: %zu\n", response->max_size);
+
+	ret = ns_answer(zonedb, response);
+	if (ret != 0) {
+		// now only one type of error (SERVFAIL), later maybe more
+		knot_ns_error_response_full(nameserver, response,
+		                            KNOT_RCODE_SERVFAIL,
+		                            response_wire, rsize);
+	} else {
+		dbg_ns("Created response packet.\n");
+		//knot_response_dump(resp);
+		knot_packet_dump(response);
+
+		// 4) Transform the packet into wire format
+		if (ns_response_to_wire(response, response_wire, rsize) != 0) {
+			// send back SERVFAIL (as this is our problem)
+			knot_ns_error_response_full(nameserver, response,
+			                            KNOT_RCODE_SERVFAIL,
+			                            response_wire, rsize);
+		}
+	}
+
+	rcu_read_unlock();
+	knot_packet_free(&response);
+
+	dbg_ns("Returning response with wire size %zu\n", *rsize);
+	//dbg_ns_hex((char *)response_wire, *rsize);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_init_xfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr)
+{
+	dbg_ns("knot_ns_init_xfr()\n");
+
+	if (nameserver == NULL || xfr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// no need to parse rest of the packet
+	/*! \todo Parse rest of packet because of EDNS. */
+	int ret = knot_packet_parse_rest(xfr->query);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to parse rest of the query: %s\n", 
+		       knot_strerror(ret));
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+				  (ret == KNOT_EMALF) ? KNOT_RCODE_FORMERR
+				                      : KNOT_RCODE_SERVFAIL, 
+				  xfr->wire, &xfr->wire_size);
+		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+		                xfr->wire_size);
+		return ret;
+	}
+	
+	dbg_packet("Parsed XFR query:\n");
+	knot_packet_dump(xfr->query);
+
+	// initialize response packet structure
+	knot_packet_t *response = knot_packet_new(
+	                               KNOT_PACKET_PREALLOC_RESPONSE);
+	if (response == NULL) {
+		dbg_ns("Failed to create packet structure.\n");
+		/*! \todo xfr->wire is not NULL, will fail on assert! */
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+				  KNOT_RCODE_SERVFAIL, xfr->wire,
+				  &xfr->wire_size);
+		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+		                xfr->wire_size);
+		knot_packet_free(&response);
+		return ret;
+	}
+
+	//int ret = knot_packet_set_max_size(response, xfr->wire_size);
+	response->wireformat = xfr->wire;
+	response->max_size = xfr->wire_size;
+
+//	if (ret != KNOT_EOK) {
+//		dbg_ns("Failed to init response structure.\n");
+//		/*! \todo xfr->wire is not NULL, will fail on assert! */
+//		knot_ns_error_response(nameserver, xfr->query->header.id,
+//		                         KNOT_RCODE_SERVFAIL, xfr->wire,
+//		                         &xfr->wire_size);
+//		int res = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+//		                    xfr->wire_size);
+//		knot_packet_free(&response);
+//		return res;
+//	}
+
+	ret = knot_response_init_from_query(response, xfr->query);
+
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to init response structure.\n");
+		/*! \todo xfr->wire is not NULL, will fail on assert! */
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+		                         KNOT_RCODE_SERVFAIL, xfr->wire,
+		                         &xfr->wire_size);
+		int res = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+		                    xfr->wire_size);
+		knot_packet_free(&response);
+		return res;
+	}
+
+	xfr->response = response;
+	
+	knot_zonedb_t *zonedb = rcu_dereference(nameserver->zone_db);
+	
+	const knot_dname_t *qname = knot_packet_qname(xfr->response);
+
+	assert(knot_packet_qtype(xfr->response) == KNOT_RRTYPE_AXFR ||
+	       knot_packet_qtype(xfr->response) == KNOT_RRTYPE_IXFR);
+
+dbg_ns_exec(
+	char *name_str = knot_dname_to_str(qname);
+	dbg_ns("Trying to find zone with name %s\n", name_str);
+	free(name_str);
+);
+	// find zone in which to search for the name
+	knot_zone_t *zone = knot_zonedb_find_zone(zonedb, qname);
+
+	// if no zone found, return NotAuth
+	if (zone == NULL) {
+		dbg_ns("No zone found.\n");
+		knot_response_set_rcode(xfr->response, KNOT_RCODE_NOTAUTH);
+		ns_xfr_send_and_clear(xfr, 1);
+		return KNOT_ENOZONE;
+	}
+
+dbg_ns_exec(
+	char *name2_str = knot_dname_to_str(qname);
+	dbg_ns("Found zone for name %s\n", name2_str);
+	free(name2_str);
+);
+	xfr->zone = zone;
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ns_serial_compare(uint32_t s1, uint32_t s2)
+{
+	int32_t diff = ns_serial_difference(s1, s2);
+	return (s1 == s2) /* s1 equal to s2 */
+	        ? 0 
+	        :((diff >= 1 && diff < ((uint32_t)1 << 31)) 
+	           ? 1	/* s1 larger than s2 */
+	           : -1); /* s1 less than s2 */
+}
+
+/*----------------------------------------------------------------------------*/
+
+int ns_ixfr_load_serials(const knot_ns_xfr_t *xfr, uint32_t *serial_from, 
+                         uint32_t *serial_to)
+{
+	if (xfr == NULL || xfr->zone == NULL || serial_from == NULL 
+	    || serial_to == NULL) {
+		dbg_ns_detail("Wrong parameters: xfr=%p,"
+		             " xfr->zone = %p\n", xfr, xfr->zone);
+		return KNOT_EBADARG;
+	}
+	
+	const knot_zone_t *zone = xfr->zone;
+	const knot_zone_contents_t *contents = knot_zone_contents(zone);
+	if (!contents) {
+		dbg_ns_detail("Missing contents\n");
+		return KNOT_EBADARG;
+	}
+	
+	if (knot_zone_contents_apex(contents) == NULL) {
+		dbg_ns_detail("No apex.\n");
+		return KNOT_EBADARG;
+	}
+	
+	const knot_rrset_t *zone_soa =
+		knot_node_rrset(knot_zone_contents_apex(contents),
+		                  KNOT_RRTYPE_SOA);
+	if (zone_soa == NULL) {
+		dbg_ns_verb("No SOA.\n");
+		return KNOT_EBADARG;
+	}
+	
+	if (knot_packet_nscount(xfr->query) < 1) {
+		dbg_ns_verb("No Authority record.\n");
+		return KNOT_EMALF;
+	}
+	
+	if (knot_packet_authority_rrset(xfr->query, 0) == NULL) {
+		dbg_ns_verb("Authority record missing.\n");
+		return KNOT_ERROR;
+	}
+	
+	// retrieve origin (xfr) serial and target (zone) serial
+	*serial_to = knot_rdata_soa_serial(knot_rrset_rdata(zone_soa));
+	*serial_from = knot_rdata_soa_serial(knot_rrset_rdata(
+			knot_packet_authority_rrset(xfr->query, 0)));
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_xfr_send_error(const knot_nameserver_t *nameserver,
+                           knot_ns_xfr_t *xfr, knot_rcode_t rcode)
+{
+	/*! \todo Handle TSIG errors differently. */
+	knot_response_set_rcode(xfr->response, rcode);
+	
+	/*! \todo Probably rename the function. */
+	int ret = 0;
+	if ((ret = ns_xfr_send_and_clear(xfr, 1)) != KNOT_EOK) {
+		size_t size = 0;
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+		                       KNOT_RCODE_SERVFAIL, xfr->wire, &size);
+		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, size);
+	}
+	
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_answer_axfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr)
+{
+	if (xfr == NULL || nameserver == NULL || xfr->zone == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	rcu_read_lock();
+	
+	// take the contents and answer from them
+	int ret = 0;
+	knot_zone_contents_t *contents = knot_zone_get_contents(xfr->zone);
+	if (!contents) {
+		dbg_ns("AXFR failed on stub zone\n");
+		/*! \todo replace with knot_ns_xfr_send_error() */
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+					 KNOT_RCODE_SERVFAIL, xfr->wire,
+					 &xfr->wire_size);
+		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire,
+				xfr->wire_size);
+		rcu_read_unlock();
+		knot_packet_free(&xfr->response);
+		return KNOT_EOK;
+	}
+	
+	/*!
+	 * \todo [TSIG] The TSIG data should already be stored in 'xfr'.
+	 *       Now just count the expected size of the TSIG RR and save it
+	 *       to the response structure.
+	 */
+	
+	/*! \todo [TSIG] Get the TSIG size from some API function. */
+	if (xfr->tsig_size > 0) {
+		dbg_ns_detail("Setting TSIG size in packet: %zu\n",
+		              xfr->tsig_size);
+		knot_packet_set_tsig_size(xfr->response, xfr->tsig_size);
+	}
+
+	ret = ns_axfr_from_zone(contents, xfr);
+
+	/*! \todo Somehow distinguish when it makes sense to send the SERVFAIL
+	 *        and when it does not. E.g. if there was problem in sending
+	 *        packet, it will probably fail when sending the SERVFAIL also.
+	 */
+	if (ret < 0) {
+		dbg_ns("AXFR failed, sending SERVFAIL.\n");
+		// now only one type of error (SERVFAIL), later maybe more
+		/*! \todo xfr->wire is not NULL, will fail on assert! */
+		/*! \todo replace with knot_ns_xfr_send_error() */
+		knot_ns_error_response(nameserver, xfr->query->header.id,
+		                         KNOT_RCODE_SERVFAIL, xfr->wire,
+		                         &xfr->wire_size);
+		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+		                xfr->wire_size);
+	} else if (ret > 0) {
+		ret = KNOT_ERROR;
+	}
+
+	rcu_read_unlock();
+
+	knot_packet_free(&xfr->response);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_answer_ixfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr)
+{
+	if (nameserver == NULL || xfr == NULL || xfr->zone == NULL
+	    || xfr->response == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	//uint8_t *wire = NULL;
+	//size_t size = xfr->wire_size;
+	
+	// parse rest of the packet (we need the Authority record)
+	int ret = knot_packet_parse_rest(xfr->query);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to parse rest of the packet. Reply FORMERR.\n");
+//		knot_ns_error_response_full(nameserver, xfr->response,
+//		                            KNOT_RCODE_FORMERR, xfr->wire, 
+//		                            &size);
+		knot_ns_xfr_send_error(nameserver, xfr, KNOT_RCODE_FORMERR);
+
+		//ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, size);
+		knot_packet_free(&xfr->response);
+		return ret;
+	}
+
+	// check if the zone has contents
+	if (knot_zone_contents(xfr->zone) == NULL) {
+		dbg_ns("Zone expired or not bootstrapped. Reply SERVFAIL.\n");
+		ret = knot_ns_xfr_send_error(nameserver, xfr, KNOT_RCODE_SERVFAIL);
+//		knot_ns_error_response_full(nameserver, xfr->response,
+//		                            KNOT_RCODE_SERVFAIL, xfr->wire, 
+//		                            &size);
+
+//		ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, size);
+		knot_packet_free(&xfr->response);
+		return ret;
+	}
+	
+	/*!
+	 * \todo [TSIG] The TSIG data should already be stored in 'xfr'.
+	 *       Now just count the expected size of the TSIG RR and save it
+	 *       to the response structure. This should be optional, only if
+	 *       the request contained TSIG, i.e. if there is the data in 'xfr'.
+	 */
+	
+	/*! \todo [TSIG] Get the TSIG size from some API function. */
+	if (xfr->tsig_size > 0) {
+		knot_packet_set_tsig_size(xfr->response, xfr->tsig_size);
+	}
+	
+	ret = ns_ixfr(xfr);
+
+	/*! \todo Somehow distinguish when it makes sense to send the SERVFAIL
+	 *        and when it does not. E.g. if there was problem in sending
+	 *        packet, it will probably fail when sending the SERVFAIL also.
+	 */
+	if (ret < 0) {
+		dbg_ns("IXFR failed, sending SERVFAIL.\n");
+		// now only one type of error (SERVFAIL), later maybe more
+
+		/*! \todo Extract this to some function. */
+//		knot_response_set_rcode(xfr->response, KNOT_RCODE_SERVFAIL);
+//		uint8_t *wire = NULL;
+//		ret = knot_packet_to_wire(xfr->response, &wire, &size);
+//		if (ret != KNOT_EOK) {
+////			knot_ns_error_response(nameserver, 
+////			                         xfr->query->header.id,
+////			                         KNOT_RCODE_SERVFAIL, xfr->wire, 
+////			                         &size);
+////			ret = xfr->send(xfr->session, &xfr->addr, xfr->wire, 
+////			                size);
+//			knot_ns_xfr_send_error(xfr, KNOT_RCODE_SERVFAIL);
+//			knot_packet_free(&xfr->response);
+//			return ret;
+//		} else {
+//			ret = xfr->send(xfr->session, &xfr->addr, wire, size);
+//		}
+		knot_ns_xfr_send_error(nameserver, xfr, KNOT_RCODE_SERVFAIL);
+	} /*else if (ret > 0) {
+		ret = KNOT_ERROR;
+	}*/
+
+	knot_packet_free(&xfr->response);
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_process_axfrin(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr)
+{
+	/*!
+	 * \todo [TSIG] Here we assume that 'xfr' contains TSIG information
+	 *       and the digest of the query sent to the master or the previous
+	 *       digest.
+	 */
+	
+	dbg_ns("ns_process_axfrin: incoming packet, wire size: %zu\n",
+	              xfr->wire_size);
+
+	int ret = xfrin_process_axfr_packet(/*xfr->wire, xfr->wire_size,*/
+	                             /*(xfrin_constructed_zone_t **)(&xfr->data)*/
+	                                    xfr);
+
+	if (ret > 0) { // transfer finished
+		dbg_ns("ns_process_axfrin: AXFR finished, zone created.\n");
+		/*
+		 * Adjust zone so that node count is set properly and nodes are
+		 * marked authoritative / delegation point.
+		 */
+		xfrin_constructed_zone_t *constr_zone = 
+				(xfrin_constructed_zone_t *)xfr->data;
+		knot_zone_contents_t *zone = constr_zone->contents;
+		assert(zone != NULL);
+
+		dbg_ns("ns_process_axfrin: adjusting zone.\n");
+		knot_zone_contents_adjust(zone, 0);
+
+		/* Create and fill hash table */
+		dbg_ns("ns_process_axfrin: filling hash table.\n");
+		int rc = knot_zone_contents_create_and_fill_hash_table(zone);
+		if (rc != KNOT_EOK) {
+			return KNOT_ERROR;	// TODO: change error code
+		}
+		
+		// save the zone contents to the xfr->data
+		xfr->data = zone;
+		
+		// free the structure used for processing XFR
+		assert(constr_zone->rrsigs == NULL);
+		free(constr_zone);
+
+		//knot_zone_contents_dump(zone, 0);
+	}
+	
+	/*!
+	 * \todo In case of error, shouldn't the zone be destroyed here?
+	 */
+	
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_switch_zone(knot_nameserver_t *nameserver, 
+                          knot_ns_xfr_t *xfr)
+{
+	if (xfr == NULL || nameserver == NULL || xfr->data == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	knot_zone_contents_t *zone = (knot_zone_contents_t *)xfr->data;
+	
+	dbg_ns("Replacing zone by new one: %p\n", zone);
+
+	// find the zone in the zone db
+	knot_zone_t *z = knot_zonedb_find_zone(nameserver->zone_db,
+			knot_node_owner(knot_zone_contents_apex(zone)));
+	if (z == NULL) {
+		char *name = knot_dname_to_str(knot_node_owner(
+				knot_zone_contents_apex(zone)));
+		dbg_ns("Failed to replace zone %s, old zone "
+		                   "not found\n", name);
+		free(name);
+	} else {
+		zone->zone = z;
+	}
+
+	knot_zone_contents_t *old = rcu_xchg_pointer(&z->contents, zone);
+
+//	knot_zone_t *old = knot_zonedb_replace_zone(nameserver->zone_db,
+//	                                                zone);
+	dbg_ns("Old zone: %p\n", old);
+//	if (old == NULL) {
+//		char *name = knot_dname_to_str(
+//				knot_node_owner(knot_zone_apex(zone)));
+//		dbg_ns("Failed to replace zone %s\n", name);
+//		free(name);
+//	}
+
+	// wait for readers to finish
+	dbg_ns("Waiting for readers to finish...\n");
+	synchronize_rcu();
+	// destroy the old zone
+	dbg_ns("Freeing old zone: %p\n", old);
+	knot_zone_contents_deep_free(&old, 0);
+
+dbg_ns_exec(
+	dbg_ns("Zone db contents: (zone count: %zu)\n",
+	              nameserver->zone_db->zone_count);
+
+	const knot_zone_t **zones = knot_zonedb_zones(nameserver->zone_db);
+	for (int i = 0; i < knot_zonedb_zone_count
+	     (nameserver->zone_db); i++) {
+		dbg_ns("%d. zone: %p", i, zones[i]);
+		char *name = knot_dname_to_str(zones[i]->name);
+		dbg_ns("    zone name: %s\n", name);
+		free(name);
+	}
+	free(zones);
+);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*! \todo In this function, xfr->zone is properly set. If this is so, we do not
+ *        have to search for the zone after the transfer has finished.
+ */
+int knot_ns_process_ixfrin(knot_nameserver_t *nameserver, 
+                             knot_ns_xfr_t *xfr)
+{
+	dbg_ns("ns_process_ixfrin: incoming packet\n");
+	
+	/*!
+	 * \todo [TSIG] Here we assume that 'xfr' contains TSIG information
+	 *       and the digest of the query sent to the master or the previous
+	 *       digest.
+	 */
+
+	int ret = xfrin_process_ixfr_packet(xfr/*xfr->wire, xfr->wire_size,
+	                                   (knot_changesets_t **)(&xfr->data)*/);
+	
+	if (ret == XFRIN_RES_FALLBACK) {
+		dbg_ns("ns_process_ixfrin: Fallback to AXFR.\n");
+		assert(xfr->data == NULL);
+//		dbg_ns("xfr->zone = %p\n", xfr->zone);
+//		dbg_ns("Zone name: %.*s\n", 
+//		              xfr->zone->name->size, xfr->zone->name->name);
+//		assert(xfr->zone == NULL);
+		knot_packet_free(&xfr->query);
+		return KNOT_ENOIXFR;
+	}
+	
+	if (ret > 0) {
+		dbg_ns("ns_process_ixfrin: IXFR finished\n");
+
+		knot_changesets_t *chgsets = (knot_changesets_t *)xfr->data;
+		if (chgsets == NULL || chgsets->first_soa == NULL) {
+			// nothing to be done??
+			dbg_ns("No changesets created for incoming IXFR!\n");
+			return ret;
+		}
+
+		// find zone associated with the changesets
+		knot_zone_t *zone = knot_zonedb_find_zone(
+		                 nameserver->zone_db,
+		                 knot_rrset_owner(chgsets->first_soa));
+		if (zone == NULL) {
+			dbg_ns("No zone found for incoming IXFR!\n");
+			knot_free_changesets(
+				(knot_changesets_t **)(&xfr->data));
+			return KNOT_ENOZONE;  /*! \todo Other error code? */
+		}
+		
+		switch (ret) {
+		case XFRIN_RES_COMPLETE:
+			xfr->zone = zone;
+			break;
+		case XFRIN_RES_SOA_ONLY: {
+			// compare the SERIAL from the changeset with the zone's
+			// serial
+			const knot_node_t *apex = knot_zone_contents_apex(
+					knot_zone_contents(zone));
+			if (apex == NULL) {
+				return KNOT_ERROR;
+			}
+			
+			const knot_rrset_t *zone_soa = knot_node_rrset(
+					apex, KNOT_RRTYPE_SOA);
+			if (zone_soa == NULL) {
+				return KNOT_ERROR;
+			}
+			
+			if (knot_rdata_soa_serial(knot_rrset_rdata(
+			        chgsets->first_soa))
+			    != knot_rdata_soa_serial(knot_rrset_rdata(
+			        zone_soa))) {
+				dbg_ns("Update did not fit.\n");
+				return KNOT_EAGAIN;
+			} else {
+				// free changesets
+				dbg_ns("No update needed.\n");
+				knot_free_changesets(
+					(knot_changesets_t **)(&xfr->data));
+				return KNOT_ENOXFR;
+			}
+		} break;
+		}
+	}
+	
+	/*!
+	 * \todo In case of error, shouldn't the zone be destroyed here?
+	 */
+	
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_process_update(knot_nameserver_t *nameserver, knot_packet_t *query,
+                           uint8_t *response_wire, size_t *rsize,
+                           knot_zone_t **zone, knot_changeset_t **changeset)
+{
+	// 1) Parse the rest of the packet
+	assert(knot_packet_is_query(query));
+
+	knot_packet_t *response;
+	assert(*rsize >= MAX_UDP_PAYLOAD);
+	int ret = knot_ns_prepare_response(nameserver, query, &response,
+	                                   MAX_UDP_PAYLOAD);
+	if (ret != KNOT_EOK) {
+		knot_ns_error_response(nameserver, knot_packet_id(query),
+		                       KNOT_RCODE_SERVFAIL, response_wire,
+		                       rsize);
+		return KNOT_EOK;
+	}
+
+	assert(response != NULL);
+
+	dbg_ns("Query - parsed: %zu, total wire size: %zu\n",
+	              query->parsed, query->size);
+
+	if (knot_packet_parsed(query) < knot_packet_size(query)) {
+		ret = knot_packet_parse_rest(query);
+		if (ret != KNOT_EOK) {
+			dbg_ns("Failed to parse rest of the query: "
+			              "%s.\n", knot_strerror(ret));
+			knot_ns_error_response_full(nameserver, response,
+			                            (ret == KNOT_EMALF)
+			                               ? KNOT_RCODE_FORMERR
+			                               : KNOT_RCODE_SERVFAIL,
+			                            response_wire, rsize);
+			knot_packet_free(&response);
+			return KNOT_EOK;
+		}
+	}
+
+	dbg_ns("Query - parsed: %zu, total wire size: %zu\n",
+	              knot_packet_parsed(query), knot_packet_size(query));
+
+	/*! \todo API for EDNS values. */
+	dbg_ns("Opt RR: version: %d, payload: %d\n",
+	              query->opt_rr.version, query->opt_rr.payload);
+
+	// 2) Find zone for the query
+	// we do not check if there is only one entry in the Question section
+	// because the packet structure does not allow it
+	/*! \todo Check number of Question entries while parsing. */
+	if (knot_packet_qtype(query) != KNOT_RRTYPE_SOA) {
+		dbg_ns("Question is not of type SOA.\n");
+		knot_ns_error_response_full(nameserver, response,
+		                            KNOT_RCODE_FORMERR,
+		                            response_wire, rsize);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	*zone = knot_zonedb_find_zone(nameserver->zone_db,
+	                            knot_packet_qname(query));
+	if (*zone == NULL) {
+		dbg_ns("Zone not found for the update.\n");
+		knot_ns_error_response_full(nameserver, response,
+		                            KNOT_RCODE_NOTAUTH,
+		                            response_wire, rsize);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	uint8_t rcode = 0;
+	// 3) Check zone
+	ret = knot_ddns_check_zone(*zone, query, &rcode);
+	if (ret == KNOT_EBADZONE) {
+		// zone is slave, forward the request
+		/*! \todo Implement forwarding. */
+		return KNOT_EBADZONE;
+	} else if (ret != KNOT_EOK) {
+		dbg_ns("Failed to check zone for update: "
+		              "%s.\n", knot_strerror(ret));
+		knot_ns_error_response_full(nameserver, response, rcode,
+		                            response_wire, rsize);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	// 4) Convert prerequisities
+	knot_ddns_prereq_t *prereqs = NULL;
+	ret = knot_ddns_process_prereqs(query, &prereqs, &rcode);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to check zone for update: "
+		              "%s.\n", knot_strerror(ret));
+		knot_ns_error_response_full(nameserver, response, rcode,
+		                            response_wire, rsize);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	assert(prereqs != NULL);
+
+	// 5) Check prerequisities
+	/*! \todo Somehow ensure the zone will not be changed until the update
+	 *        is finished.
+	 */
+	ret = knot_ddns_check_prereqs(knot_zone_contents(*zone), &prereqs,
+	                              &rcode);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to check zone for update: "
+		              "%s.\n", knot_strerror(ret));
+		knot_ns_error_response_full(nameserver, response, rcode,
+		                            response_wire, rsize);
+		knot_ddns_prereqs_free(&prereqs);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	// 6) Convert update to changeset
+	ret = knot_ddns_process_update(query, changeset, &rcode);
+	if (ret != KNOT_EOK) {
+		dbg_ns("Failed to check zone for update: "
+		              "%s.\n", knot_strerror(ret));
+		knot_ns_error_response_full(nameserver, response, rcode,
+		                            response_wire, rsize);
+		knot_ddns_prereqs_free(&prereqs);
+		knot_packet_free(&response);
+		return KNOT_EOK;
+	}
+
+	assert(changeset != NULL);
+
+	// 7) Create response
+	dbg_ns("Update converted successfuly.\n");
+
+	/*! \todo No response yet. Distinguish somehow in the caller.
+	 *        Maybe only this case will be EOK, other cases some error.
+	 */
+
+	knot_packet_free(&response);
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_create_forward_query(const knot_packet_t *query,
+                                 uint8_t *query_wire, size_t *size)
+{
+	// just copy the wireformat of the query and set a new random ID to it
+	if (knot_packet_size(query) > *size) {
+		return KNOT_ESPACE;
+	}
+
+	memcpy(query_wire, knot_packet_wireformat(query),
+	       knot_packet_size(query));
+	*size = knot_packet_size(query);
+
+	knot_wire_set_id(query_wire, knot_random_id());
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ns_process_forward_response(const knot_packet_t *response,
+                                     uint16_t original_id,
+                                     uint8_t *response_wire, size_t *size)
+{
+	// just copy the wireformat of the response and set the original ID
+
+	if (knot_packet_size(response) > *size) {
+		return KNOT_ESPACE;
+	}
+
+	memcpy(response_wire, knot_packet_wireformat(response),
+	       knot_packet_size(response));
+	*size = knot_packet_size(response);
+
+	knot_wire_set_id(response_wire, original_id);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void *knot_ns_data(knot_nameserver_t *nameserver)
+{
+	return nameserver->data;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void *knot_ns_get_data(knot_nameserver_t *nameserver)
+{
+	return nameserver->data;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_ns_set_data(knot_nameserver_t *nameserver, void *data)
+{
+	nameserver->data = data;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_ns_destroy(knot_nameserver_t **nameserver)
+{
+	synchronize_rcu();
+
+	free((*nameserver)->err_response);
+	if ((*nameserver)->opt_rr != NULL) {
+		knot_edns_free(&(*nameserver)->opt_rr);
+	}
+
+	// destroy the zone db
+	knot_zonedb_deep_free(&(*nameserver)->zone_db);
+
+	free(*nameserver);
+	*nameserver = NULL;
+}
diff --git a/src/libknot/nameserver/name-server.h b/src/libknot/nameserver/name-server.h
new file mode 100644
index 0000000..0d93df6
--- /dev/null
+++ b/src/libknot/nameserver/name-server.h
@@ -0,0 +1,358 @@
+/*!
+ * \file name-server.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * Contains the "name server" structure and interface for the main DNS
+ * functions. Currently only supports answering simple queries, without any
+ * extensions.
+ *
+ * \todo Consider saving pointer to the zdb_find_name() function in the
+ *       nameserver structure. Probably not needed, these modules can be
+ *       inter-connected.
+ * \todo Provide interface for other DNS functions - zone transfers, dynamic
+ *       updates, etc.
+ *
+ * \addtogroup query_processing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_NAME_SERVER_H_
+#define _KNOT_NAME_SERVER_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "zone/zonedb.h"
+#include "edns.h"
+#include "consts.h"
+#include "tsig.h"
+#include "packet/packet.h"
+#include "common/sockaddr.h"
+#include "updates/changesets.h"
+
+struct conf_t;
+struct server_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Name server structure. Holds all important data needed for the
+ *        supported DNS functions.
+ *
+ * Currently only holds pointer to the zone database for answering queries.
+ */
+typedef struct knot_nameserver {
+	/*!
+	 * \brief Pointer to the zone database structure used for answering
+	 *        queries.
+	 */
+	knot_zonedb_t *zone_db;
+	uint8_t *err_response;    /*!< Prepared generic error response. */
+	size_t err_resp_size;     /*!< Size of the prepared error response. */
+	knot_opt_rr_t *opt_rr;  /*!< OPT RR with the server's EDNS0 info. */
+	
+	void *data;
+} knot_nameserver_t;
+
+/*! \brief Callback for sending one packet back through a TCP connection. */
+typedef int (*xfr_callback_t)(int session, sockaddr_t *addr,
+			      uint8_t *packet, size_t size);
+
+/*!
+ * \brief Single XFR operation structure.
+ *
+ * Used for communication with XFR handler.
+ */
+typedef struct knot_ns_xfr {
+	int type;
+	int flags;
+	sockaddr_t addr;
+	knot_packet_t *query;
+	knot_packet_t *response;
+	xfr_callback_t send;
+	int session;
+	
+	/*!
+	 * XFR-out: Output buffer.
+	 * XFR-in: Buffer for query or incoming packet.
+	 */
+	uint8_t *wire;
+	
+	/*! 
+	 * XFR-out: Size of the output buffer. 
+	 * XFR-in: Size of the current packet. 
+	 */
+	size_t wire_size;
+	void *data;
+	knot_zone_t *zone;
+	void *owner;
+	
+	/*! \note [TSIG] TSIG fields */
+	/*! \brief Message(s) to sign in wireformat. 
+	 *
+	 *  This field should be allocated at the start of transfer and 
+	 *  freed at the end. During the transfer it is only rewritten.
+	 */
+	uint8_t *tsig_data;
+	size_t tsig_data_size; /*!< Size of the message(s) in bytes */
+//	const knot_rrset_t *tsig; /*!< Response TSIG. 
+//	                            \todo [TSIG] Replace with separate data. */
+	size_t tsig_size;      /*!< Size of the TSIG RR wireformat in bytes.*/
+	knot_key_t *tsig_key;  /*!< Associated TSIG key for signing. */
+	
+	uint8_t *digest;     /*!< Buffer for counting digest. */
+	size_t digest_size;  /*!< Size of the digest. */
+	size_t digest_max_size; /*!< Size of the buffer. */
+	
+	/*! \brief Previous digest or request digest. 
+	 *
+	 *  Should be allocated before the transfer (known size).
+	 */
+//	uint8_t *prev_digest;
+//	size_t prev_digest_size; /*!< Size of previous digest in bytes. */
+	
+	/*! 
+	 * \brief Number of the packet currently assembled.
+	 *
+	 * In case of XFR-in, this is not the overall number of packet, just 
+	 * number counted from last TSIG check.
+	 */
+	int packet_nr;
+} knot_ns_xfr_t;
+
+
+static const int KNOT_NS_TSIG_FREQ = 100;
+
+static const size_t KNOT_NS_TSIG_DATA_MAX_SIZE = 100 * 64 * 1024;
+
+/*!
+ * \brief XFR request flags.
+ */
+enum knot_ns_xfr_flag_t {
+	XFR_FLAG_TCP = 1 << 0, /*!< XFR request is on TCP. */
+	XFR_FLAG_UDP = 1 << 1  /*!< XFR request is on UDP. */
+};
+
+/*!
+ * \brief XFR request types.
+ */
+typedef enum knot_ns_xfr_type_t {
+	/* Special events. */
+	XFR_TYPE_CLOSE = -1, /*!< Close connection event. */
+
+	/* DNS events. */
+	XFR_TYPE_AIN = 0,   /*!< AXFR-IN request (start transfer). */
+	XFR_TYPE_AOUT,  /*!< AXFR-OUT request (incoming transfer). */
+	XFR_TYPE_IIN,   /*!< IXFR-IN request (start transfer). */
+	XFR_TYPE_IOUT,  /*!< IXFR-OUT request (incoming transfer). */
+	XFR_TYPE_SOA,   /*!< Pending SOA request. */
+	XFR_TYPE_NOTIFY /*!< Pending NOTIFY query. */
+} knot_ns_xfr_type_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Allocates and initializes the name server structure.
+ *
+ * \return Pointer to the name server structure.
+ */
+knot_nameserver_t *knot_ns_create();
+
+/*!
+ * \brief Parses the given query into the response structure and recognizes
+ *        type of the query.
+ *
+ * Some query types are distinguished by OPCODE (NOTIFY, UPDATE, etc.), some
+ * by QTYPE (AXFR, IXFR). As these information are needed on the same layer
+ * to decide what to do with the query, the knot_query_t type is used for this
+ * purpose.
+ *
+ * \param query_wire Wire format of the query.
+ * \param qsize Size of the query in octets.
+ * \param packet Packet structure to be filled with the parsed query.
+ * \param type Type of the query.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EMALF if the query is totally unusable. Such query must be
+ *                    ignored.
+ * \retval KNOT_RCODE_SERVFAIL if there was some internal error. Call
+ *                               ns_error_response() with \a rcode set to this
+ *                               value to get proper error response.
+ * \retval KNOT_RCODE_FORMERR if the query was malformed, but can be used to
+ *                              construct an error response. Call
+ *                              ns_error_response() with \a rcode set to this
+ *                              value to get proper error response.
+ * \retval KNOT_RCODE_NOTIMPL if the query has an unsupported type. Call
+ *                              ns_error_response() with \a rcode set to this
+ *                              value to get proper error response.
+ */
+int knot_ns_parse_packet(const uint8_t *query_wire, size_t qsize,
+                    knot_packet_t *packet, knot_packet_type_t *type);
+
+/*!
+ * \brief Prepares wire format of an error response using generic error template
+ *        stored in the nameserver structure.
+ *
+ * The error response will not contain the Question section from the query, just
+ * a header with ID copied from the query and the given RCODE.
+ *
+ * \param nameserver Nameserver structure containing the error template.
+ * \param query_id ID of the query.
+ * \param rcode RCODE to set in the response.
+ * \param response_wire Place for wire format of the response.
+ * \param rsize Size of the error response will be stored here.
+ */
+void knot_ns_error_response(const knot_nameserver_t *nameserver, uint16_t query_id,
+                       uint8_t rcode, uint8_t *response_wire, size_t *rsize);
+
+/*!
+ * \brief Creates a response for the given normal query using the data of the
+ *        nameserver.
+ *
+ * \param nameserver Name server structure to provide the needed data.
+ * \param resp Response structure with parsed query.
+ * \param response_wire Place for the response in wire format.
+ * \param rsize Input: maximum acceptable size of the response. Output: real
+ *              size of the response.
+ *
+ * \retval KNOT_EOK if a valid response was created.
+ * \retval KNOT_EMALF if an error occured and the response is not valid.
+ */
+int knot_ns_answer_normal(knot_nameserver_t *nameserver, knot_packet_t *query,
+                     uint8_t *response_wire, size_t *rsize);
+
+int knot_ns_init_xfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr);
+
+/*! 
+ * \brief Compares two zone serials.
+ *
+ * \retval < 0 if s1 is less than s2.
+ * \retval > 0 if s1 is larger than s2.
+ * \retval == 0 if s1 is equal to s2.
+ */
+int ns_serial_compare(uint32_t s1, uint32_t s2);
+
+int ns_ixfr_load_serials(const knot_ns_xfr_t *xfr, uint32_t *serial_from, 
+                         uint32_t *serial_to);
+
+int knot_ns_xfr_send_error(const knot_nameserver_t *nameserver,
+                           knot_ns_xfr_t *xfr, knot_rcode_t rcode);
+
+/*!
+ * \brief Processes an AXFR query.
+ *
+ * This function sequentially creates DNS packets to be sent as a response
+ * to the AXFR query and sends each packet using the given callback (\a
+ * send_packet).
+ *
+ * \param nameserver Name server structure to provide the data for answering.
+ * \param xfr Persistent transfer-specific data.
+ *
+ * \note Currently only a stub which sends one error response using the given
+ *       callback.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EINVAL
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_ERROR
+ *
+ * \todo Maybe the place for the wire format should be passed in as in
+ *       the ns_answer_request() function...?
+ */
+int knot_ns_answer_axfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Processes an IXFR query.
+ *
+ * \param nameserver Name server structure to provide the data for answering.
+ * \param xfr Persistent transfer-specific data.
+ *
+ * \todo Document properly.
+ */
+int knot_ns_answer_ixfr(knot_nameserver_t *nameserver, knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Processes an AXFR-IN packet.
+ *
+ * \param nameserver Name server structure to provide the data for answering.
+ * \param xfr Persistent transfer-specific data.
+ *
+ * \todo Document me.
+ */
+int knot_ns_process_axfrin(knot_nameserver_t *nameserver, 
+                             knot_ns_xfr_t *xfr);
+
+int knot_ns_switch_zone(knot_nameserver_t *nameserver, 
+                          knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Processes an IXFR-IN packet.
+ *
+ * \param nameserver Name server structure to provide the data for answering.
+ * \param xfr Persistent transfer-specific data.
+ *
+ * \retval KNOT_EOK If this packet was processed successfuly and another packet
+ *                  is expected. (RFC1995bis, case c)
+ * \retval KNOT_ENOXFR If the transfer is not taking place because server's 
+ *                     SERIAL is the same as this client's SERIAL. The client
+ *                     should close the connection and do no further processing.
+ *                     (RFC1995bis case a).
+ * \retval KNOT_EAGAIN If the server could not fit the transfer into the packet.
+ *                     This should happen only if UDP was used. In this case
+ *                     the client should retry the request via TCP. If UDP was
+ *                     not used, it should be considered that the transfer was 
+ *                     malformed and the connection should be closed.
+ *                     (RFC1995bis case b).
+ * \retval >0 Transfer successully finished. Changesets are created and furter
+ *            processing is needed.
+ * \retval Other If any other error occured. The connection should be closed.
+ *
+ * \todo Document me.
+ */
+int knot_ns_process_ixfrin(knot_nameserver_t *nameserver, 
+                             knot_ns_xfr_t *xfr);
+
+int knot_ns_process_update(knot_nameserver_t *nameserver, knot_packet_t *query,
+                           uint8_t *response_wire, size_t *rsize,
+                           knot_zone_t **zone, knot_changeset_t **changeset);
+
+int knot_ns_create_forward_query(const knot_packet_t *query,
+                                 uint8_t *query_wire, size_t *size);
+
+int knot_ns_process_forward_response(const knot_packet_t *response,
+                                     uint16_t original_id,
+                                     uint8_t *response_wire, size_t *size);
+
+void *knot_ns_data(knot_nameserver_t *nameserver);
+
+void *knot_ns_get_data(knot_nameserver_t *nameserver);
+
+void knot_ns_set_data(knot_nameserver_t *nameserver, void *data);
+
+int knot_ns_tsig_required(int packet_nr);
+
+/*!
+ * \brief Properly destroys the name server structure.
+ *
+ * \param nameserver Nameserver to destroy.
+ */
+void knot_ns_destroy(knot_nameserver_t **nameserver);
+
+
+#endif /* _KNOTNAME_SERVER_H_ */
+
+/*! @} */
diff --git a/src/libknot/nsec3.c b/src/libknot/nsec3.c
new file mode 100644
index 0000000..303d2e6
--- /dev/null
+++ b/src/libknot/nsec3.c
@@ -0,0 +1,265 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#include <openssl/evp.h>
+#include <openssl/sha.h>
+
+#include "nsec3.h"
+#include "common.h"
+#include "util/descriptor.h"
+#include "util/utils.h"
+#include "util/tolower.h"
+#include "util/error.h"
+#include "util/debug.h"
+
+/*----------------------------------------------------------------------------*/
+
+int knot_nsec3_params_from_wire(knot_nsec3_params_t *params,
+                                  const knot_rrset_t *nsec3param)
+{
+	if (params == NULL || nsec3param == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	assert(knot_rrset_type(nsec3param) == KNOT_RRTYPE_NSEC3PARAM);
+	const knot_rdata_t *rdata = knot_rrset_rdata(nsec3param);
+
+	assert(rdata->count == 4);
+
+	params->algorithm = *(uint8_t *)
+	                     (&knot_rdata_item(rdata, 0)->raw_data[1]);
+	params->flags = *(uint8_t *)
+			(&knot_rdata_item(rdata, 1)->raw_data[1]);
+	params->iterations = knot_wire_read_u16(
+			(uint8_t *)(knot_rdata_item(rdata, 2)->raw_data + 1));
+
+	params->salt_length =
+		((uint8_t *)knot_rdata_item(rdata, 3)->raw_data)[2];
+
+	if (params->salt_length > 0) {
+		params->salt = (uint8_t *)malloc(params->salt_length);
+		CHECK_ALLOC_LOG(params->salt, -1);
+		memcpy(params->salt,
+		       (uint8_t *)knot_rdata_item(rdata, 3)->raw_data + 3,
+		       params->salt_length);
+	} else {
+		params->salt = NULL;
+	}
+
+	dbg_nsec3("Parsed NSEC3PARAM:\n");
+	dbg_nsec3("Algorithm: %hu\n", params->algorithm);
+	dbg_nsec3("Flags: %hu\n", params->flags);
+	dbg_nsec3("Iterations: %hu\n", params->iterations);
+	dbg_nsec3("Salt length: %hu\n", params->salt_length);
+	dbg_nsec3("Salt: ");
+	if (params->salt != NULL) {
+		dbg_nsec3_hex((char *)params->salt,
+		                       params->salt_length);
+		dbg_nsec3("\n");
+	} else {
+		dbg_nsec3("none\n");
+	}
+
+	return KNOT_EOK;
+}
+
+static uint8_t *knot_nsec3_to_lowercase(const uint8_t *data, size_t size)
+{
+	uint8_t *out = (uint8_t *)malloc(size);
+	CHECK_ALLOC_LOG(out, NULL);
+
+	for (int i = 0; i < size; ++i) {
+		out[i] = knot_tolower(data[i]);
+	}
+
+	return out;
+}
+
+/*----------------------------------------------------------------------------*/
+#if KNOT_NSEC3_SHA_USE_EVP
+int knot_nsec3_sha1(const knot_nsec3_params_t *params,
+                      const uint8_t *data, size_t size, uint8_t **digest,
+                      size_t *digest_size)
+{
+	if (digest == NULL || digest_size == NULL || data == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	uint8_t *salt = params->salt;
+	uint8_t salt_length = params->salt_length;
+	uint16_t iterations = params->iterations;
+
+	EVP_MD_CTX mdctx;
+	EVP_MD_CTX_init(&mdctx);
+
+	*digest = (uint8_t *)malloc(EVP_MD_size(EVP_sha1()));
+	if (*digest == NULL) {
+		ERR_ALLOC_FAILED;
+		return -1;
+	}
+
+	uint8_t *data_low = knot_nsec3_to_lowercase(data, size);
+	if (data_low == NULL) {
+		free(*digest);
+		return -1;
+	}
+
+	const uint8_t *in = data_low;
+	unsigned in_size = size;
+
+	int res = 0;
+
+#ifdef KNOT_NSEC3_DEBUG
+	unsigned long long total_time = 0;
+	unsigned long calls = 0;
+	long time = 0;
+#endif
+
+	for (int i = 0; i <= iterations; ++i) {
+#ifdef KNOT_NSEC3_DEBUG
+		perf_begin();
+#endif
+
+		EVP_DigestInit_ex(&mdctx, EVP_sha1(), NULL);
+
+		res = EVP_DigestUpdate(&mdctx, in, in_size);
+
+		if (salt_length > 0) {
+			res = EVP_DigestUpdate(&mdctx, salt, salt_length);
+		}
+
+		EVP_DigestFinal_ex(&mdctx, *digest, digest_size);
+		in = *digest;
+		in_size = *digest_size;
+
+#ifdef KNOT_NSEC3_DEBUG
+		perf_end(time);
+		total_time += time;
+		++calls;
+#endif
+
+		if (res != 1) {
+			dbg_nsec3("Error calculating SHA-1 hash.\n");
+			free(data_low);
+			free(*digest);
+			return -2;
+		}
+	}
+
+	EVP_MD_CTX_cleanup(&mdctx);
+
+	dbg_nsec3("NSEC3 hashing: calls: %lu, avg time per call: %f."
+	                   "\n", calls, (double)(total_time) / calls);
+
+	free(data_low);
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+#else
+
+int knot_nsec3_sha1(const knot_nsec3_params_t *params,
+                      const uint8_t *data, size_t size, uint8_t **digest,
+                      size_t *digest_size)
+{
+	if (params == NULL || digest == NULL || digest_size == NULL
+	    || data == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	uint8_t *salt = params->salt;
+	uint8_t salt_length = params->salt_length;
+	uint16_t iterations = params->iterations;
+
+	dbg_nsec3("Hashing: \n");
+	dbg_nsec3("  Data: %.*s \n", size, data);
+	dbg_nsec3_hex((const char *)data, size);
+	dbg_nsec3(" (size %d)\n  Iterations: %u\n", (int)size, iterations);
+	dbg_nsec3("  Salt length: %u\n", salt_length);
+	dbg_nsec3("  Salt: ");
+	if (salt_length > 0) {
+		dbg_nsec3_hex((char *)salt, salt_length);
+		dbg_nsec3("\n");
+	} else {
+		dbg_nsec3("none\n");
+	}
+
+	SHA_CTX ctx;
+
+	*digest = (uint8_t *)malloc(SHA_DIGEST_LENGTH);
+	if (*digest == NULL) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	uint8_t *data_low = knot_nsec3_to_lowercase(data, size);
+	if (data_low == NULL) {
+		free(*digest);
+		return KNOT_ENOMEM;
+	}
+
+	const uint8_t *in = data_low;
+	unsigned in_size = size;
+
+	int res = 0;
+
+	// other iterations
+	for (int i = 0; i <= iterations; ++i) {
+		SHA1_Init(&ctx);
+
+		res = SHA1_Update(&ctx, in, in_size);
+
+		if (salt_length > 0) {
+			res = SHA1_Update(&ctx, salt, salt_length);
+		}
+
+		SHA1_Final(*digest, &ctx);
+
+		in = *digest;
+		in_size = SHA_DIGEST_LENGTH;
+
+		if (res != 1) {
+			dbg_nsec3("Error calculating SHA-1 hash.\n");
+			free(data_low);
+			free(*digest);
+			return KNOT_ECRYPTO;
+		}
+	}
+
+	*digest_size = SHA_DIGEST_LENGTH;
+
+	dbg_nsec3("Hash: %.*s\n", *digest_size, *digest);
+	dbg_nsec3_hex((const char *)*digest, *digest_size);
+	dbg_nsec3("\n");
+
+	free(data_low);
+	return KNOT_EOK;
+}
+#endif
+
+/*----------------------------------------------------------------------------*/
+
+void knot_nsec3_params_free(knot_nsec3_params_t *params)
+{
+	if (params->salt != NULL) {
+		free(params->salt);
+	}
+}
diff --git a/src/libknot/nsec3.h b/src/libknot/nsec3.h
new file mode 100644
index 0000000..0ce6899
--- /dev/null
+++ b/src/libknot/nsec3.h
@@ -0,0 +1,92 @@
+/*!
+ * \file nsec3.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Functions for calcularing NSEC3 hashes.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_NSEC3_H_
+#define _KNOT_NSEC3_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "rrset.h"
+
+#define KNOT_NSEC3_SHA_USE_EVP 0
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure representing the NSEC3PARAM resource record.
+ */
+struct knot_nsec3_params {
+	uint8_t algorithm;    /*!< Hash algorithm. */
+	uint8_t flags;        /*!< Flags. */
+	uint16_t iterations;  /*!< Additional iterations of the hash function.*/
+	uint8_t salt_length;  /*!< Length of the salt field in bytes. */
+	uint8_t *salt;        /*!< Salt used in hashing. */
+};
+
+typedef struct knot_nsec3_params knot_nsec3_params_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Initializes the NSEC3PARAM structure.
+ *
+ * \param params NSEC3PARAM structure to initialize.
+ * \param nsec3param The NSEC3PARAM RRset.
+ *
+ * \retval KNOT_EOK on success (always).
+ */
+int knot_nsec3_params_from_wire(knot_nsec3_params_t *params,
+                                  const knot_rrset_t *nsec3param);
+
+/*!
+ * \brief Hashes the given data using the SHA1 hash and the given parameters.
+ *
+ * \param[in] params NSEC3PARAM structure with the required parameters for
+ *                   hashing.
+ * \param[in] data Data to hash.
+ * \param[in] size Size of the data in bytes.
+ * \param[out] digest Result will be store here.
+ * \param[out] digest_size Size of the result in octets will be stored here.
+ *
+ * \retval KNOT_EOK if successful.
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ECRYPTO
+ */
+int knot_nsec3_sha1(const knot_nsec3_params_t *params, const uint8_t *data,
+                      size_t size, uint8_t **digest, size_t *digest_size);
+
+/*!
+ * \brief Properly cleans up (but does not deallocate) the NSEC3PARAM structure.
+ *
+ * \param params NSEC3PARAMS structure to clean up.
+ */
+void knot_nsec3_params_free(knot_nsec3_params_t *params);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* _KNOT_NSEC3_H_ */
+
+/*! @} */
diff --git a/src/libknot/packet/packet.c b/src/libknot/packet/packet.c
new file mode 100644
index 0000000..82e818f
--- /dev/null
+++ b/src/libknot/packet/packet.c
@@ -0,0 +1,1532 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "packet/packet.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "common.h"
+#include "util/descriptor.h"
+#include "util/wire.h"
+
+/*----------------------------------------------------------------------------*/
+
+#define DEFAULT_RRCOUNT_QUERY(type) DEFAULT_##type##COUNT_QUERY
+#define DEFAULT_RRCOUNT(type) DEFAULT_##type##COUNT
+
+#define DEFAULT_RRSET_COUNT(type, packet) \
+	((packet->prealloc_type == KNOT_PACKET_PREALLOC_NONE)  \
+		? 0  \
+		: (packet->prealloc_type == KNOT_PACKET_PREALLOC_QUERY)  \
+			? DEFAULT_##type##_QUERY  \
+			: DEFAULT_##type)
+
+
+
+typedef enum {
+	KNOT_PACKET_DUPL_IGNORE,
+	KNOT_PACKET_DUPL_SKIP,
+	KNOT_PACKET_DUPL_MERGE
+} knot_packet_duplicate_handling_t;
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets all the pointers in the packet structure to the respective
+ *        parts of the pre-allocated space.
+ */
+static void knot_packet_init_pointers_response(knot_packet_t *pkt)
+{
+	dbg_packet("Packet pointer: %p\n", pkt);
+	
+	char *pos = (char *)pkt + PREALLOC_PACKET;
+
+	// put QNAME directly after the structure
+	pkt->question.qname = (knot_dname_t *)pos;
+	pos += PREALLOC_QNAME_DNAME;
+
+	dbg_packet("QNAME: %p\n", pkt->question.qname);
+
+	pkt->question.qname->name = (uint8_t *)pos;
+	pos += PREALLOC_QNAME_NAME;
+	pkt->question.qname->labels = (uint8_t *)pos;
+	pos += PREALLOC_QNAME_LABELS;
+
+	pkt->owner_tmp = (uint8_t *)pos;
+	dbg_packet("Tmp owner: %p\n", pkt->owner_tmp);
+	pos += PREALLOC_RR_OWNER;
+
+	// then answer, authority and additional sections
+	if (DEFAULT_ANCOUNT == 0) {
+		pkt->answer = NULL;
+	} else {
+		pkt->answer = (const knot_rrset_t **)pos;
+		pos += DEFAULT_ANCOUNT * sizeof(const knot_rrset_t *);
+	}
+	
+	if (DEFAULT_NSCOUNT == 0) {
+		pkt->authority = NULL;
+	} else {
+		pkt->authority = (const knot_rrset_t **)pos;
+		pos += DEFAULT_NSCOUNT * sizeof(const knot_rrset_t *);
+	}
+	
+	if (DEFAULT_ARCOUNT == 0) {
+		pkt->additional = NULL;
+	} else {
+		pkt->additional = (const knot_rrset_t **)pos;
+		pos += DEFAULT_ARCOUNT * sizeof(const knot_rrset_t *);
+	}
+
+	dbg_packet("Answer section: %p\n", pkt->answer);
+	dbg_packet("Authority section: %p\n", pkt->authority);
+	dbg_packet("Additional section: %p\n", pkt->additional);
+
+	pkt->max_an_rrsets = DEFAULT_ANCOUNT;
+	pkt->max_ns_rrsets = DEFAULT_NSCOUNT;
+	pkt->max_ar_rrsets = DEFAULT_ARCOUNT;
+
+	// then domain names for compression and offsets
+	pkt->compression.dnames = (const knot_dname_t **)pos;
+	pos += DEFAULT_DOMAINS_IN_RESPONSE * sizeof(const knot_dname_t *);
+	pkt->compression.offsets = (size_t *)pos;
+	pos += DEFAULT_DOMAINS_IN_RESPONSE * sizeof(size_t);
+
+	dbg_packet("Compression dnames: %p\n", pkt->compression.dnames);
+	dbg_packet("Compression offsets: %p\n", pkt->compression.offsets);
+
+	pkt->compression.max = DEFAULT_DOMAINS_IN_RESPONSE;
+
+	pkt->tmp_rrsets = (const knot_rrset_t **)pos;
+	pos += DEFAULT_TMP_RRSETS * sizeof(const knot_rrset_t *);
+
+	dbg_packet("Tmp rrsets: %p\n", pkt->tmp_rrsets);
+
+	pkt->tmp_rrsets_max = DEFAULT_TMP_RRSETS;
+
+	assert((char *)pos == (char *)pkt + PREALLOC_RESPONSE);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets all the pointers in the packet structure to the respective
+ *        parts of the pre-allocated space.
+ */
+static void knot_packet_init_pointers_query(knot_packet_t *pkt)
+{
+	dbg_packet("Packet pointer: %p\n", pkt);
+	
+	char *pos = (char *)pkt + PREALLOC_PACKET;
+
+	// put QNAME directly after the structure
+	pkt->question.qname = (knot_dname_t *)pos;
+	pos += PREALLOC_QNAME_DNAME;
+
+	dbg_packet("QNAME: %p (%zu after start of packet)\n",
+		pkt->question.qname,
+		(void *)pkt->question.qname - (void *)pkt);
+
+	pkt->question.qname->name = (uint8_t *)pos;
+	pos += PREALLOC_QNAME_NAME;
+	pkt->question.qname->labels = (uint8_t *)pos;
+	pos += PREALLOC_QNAME_LABELS;
+
+//	pkt->owner_tmp = (uint8_t *)((char *)pkt->question.qname->labels
+//	                              + PREALLOC_QNAME_LABELS);
+
+	// then answer, authority and additional sections
+	if (DEFAULT_ANCOUNT_QUERY == 0) {
+		pkt->answer = NULL;
+	} else {
+		pkt->answer = (const knot_rrset_t **)pos;
+		pos += DEFAULT_ANCOUNT_QUERY * sizeof(const knot_rrset_t *);
+	}
+	
+	if (DEFAULT_NSCOUNT_QUERY == 0) {
+		pkt->authority = NULL;
+	} else {
+		pkt->authority = (const knot_rrset_t **)pos;
+		pos += DEFAULT_NSCOUNT_QUERY * sizeof(const knot_rrset_t *);
+	}
+	
+	if (DEFAULT_ARCOUNT_QUERY == 0) {
+		pkt->additional = NULL;
+	} else {
+		pkt->additional = (const knot_rrset_t **)pos;
+		pos += DEFAULT_ARCOUNT_QUERY * sizeof(const knot_rrset_t *);
+	}
+
+	dbg_packet("Answer section: %p\n", pkt->answer);
+	dbg_packet("Authority section: %p\n", pkt->authority);
+	dbg_packet("Additional section: %p\n", pkt->additional);
+
+	pkt->max_an_rrsets = DEFAULT_ANCOUNT_QUERY;
+	pkt->max_ns_rrsets = DEFAULT_NSCOUNT_QUERY;
+	pkt->max_ar_rrsets = DEFAULT_ARCOUNT_QUERY;
+
+	pkt->tmp_rrsets = (const knot_rrset_t **)pos;
+	pos += DEFAULT_TMP_RRSETS_QUERY * sizeof(const knot_rrset_t *);
+
+	dbg_packet("Tmp rrsets: %p\n", pkt->tmp_rrsets);
+
+	pkt->tmp_rrsets_max = DEFAULT_TMP_RRSETS_QUERY;
+
+//	dbg_packet("End of data: %p (%zu after start of packet)\n",
+//		pkt->tmp_rrsets + DEFAULT_TMP_RRSETS_QUERY,
+//		(void *)(pkt->tmp_rrsets + DEFAULT_TMP_RRSETS_QUERY)
+//		- (void *)pkt);
+	dbg_packet("Allocated total: %u\n", PREALLOC_QUERY);
+
+	assert(pos == (char *)pkt + PREALLOC_QUERY);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Parses DNS header from the wire format.
+ *
+ * \note This function also adjusts the position (\a pos) and size of remaining
+ *       bytes in the wire format (\a remaining) according to what was parsed
+ *       (though it actually always parses the 12 bytes of the header).
+ *
+ * \param[in,out] pos Wire format to parse the header from.
+ * \param[in,out] remaining Remaining size of the wire format.
+ * \param[out] header Header structure to fill in.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EFEWDATA
+ */
+static int knot_packet_parse_header(const uint8_t *wire, size_t *pos,
+                                      size_t size, knot_header_t *header)
+{
+	assert(wire != NULL);
+	assert(pos != NULL);
+	assert(header != NULL);
+
+	if (size - *pos < KNOT_WIRE_HEADER_SIZE) {
+		dbg_response("Not enough data to parse header.\n");
+		return KNOT_EFEWDATA;
+	}
+
+	header->id = knot_wire_get_id(wire);
+	// copy some of the flags: OPCODE and RD
+	// do this by copying flags1 and setting QR to 1, AA to 0 and TC to 0
+	header->flags1 = knot_wire_get_flags1(wire);
+//	knot_wire_flags_set_qr(&header->flags1);
+//	knot_wire_flags_clear_aa(&header->flags1);
+//	knot_wire_flags_clear_tc(&header->flags1);
+	// do not copy flags2 (all set by server)
+	header->qdcount = knot_wire_get_qdcount(wire);
+	header->ancount = knot_wire_get_ancount(wire);
+	header->nscount = knot_wire_get_nscount(wire);
+	header->arcount = knot_wire_get_arcount(wire);
+
+	*pos += KNOT_WIRE_HEADER_SIZE;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Parses DNS Question entry from the wire format.
+ *
+ * \note This function also adjusts the position (\a pos) and size of remaining
+ *       bytes in the wire format (\a remaining) according to what was parsed.
+ *
+ * \param[in,out] pos Wire format to parse the Question from.
+ * \param[in,out] remaining Remaining size of the wire format.
+ * \param[out] question DNS Question structure to be filled.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EFEWDATA
+ * \retval KNOT_ENOMEM
+ */
+static int knot_packet_parse_question(const uint8_t *wire, size_t *pos,
+                                        size_t size,
+                                        knot_question_t *question, int alloc)
+{
+	assert(pos != NULL);
+	assert(wire != NULL);
+	assert(question != NULL);
+
+	if (size - *pos < KNOT_WIRE_QUESTION_MIN_SIZE) {
+		dbg_response("Not enough data to parse question.\n");
+		return KNOT_EFEWDATA;  // malformed
+	}
+
+	dbg_response("Parsing Question starting on position %zu.\n",
+	                      *pos);
+
+	// domain name must end with 0, so just search for 0
+	int i = *pos;
+	while (i < size && wire[i] != 0) {
+		++i;
+	}
+
+	if (size - i - 1 < 4) {
+		dbg_response("Not enough data to parse question.\n");
+		return KNOT_EFEWDATA;  // no 0 found or not enough data left
+	}
+
+	dbg_response("Parsing dname starting on position %zu and "
+	                      "%zu bytes long.\n", *pos, i - *pos + 1);
+	dbg_response("Alloc: %d\n", alloc);
+	if (alloc) {
+		question->qname = knot_dname_new_from_wire(
+				wire + *pos, i - *pos + 1, NULL);
+		if (question->qname == NULL) {
+			return KNOT_ENOMEM;
+		}
+	} else {
+		int res = knot_dname_from_wire(wire + *pos, i - *pos + 1,
+	                                         NULL, question->qname);
+		if (res != KNOT_EOK) {
+			assert(res != KNOT_EBADARG);
+			return res;
+		}
+	}
+
+	*pos = i + 1;
+	question->qtype = knot_wire_read_u16(wire + i + 1);
+	//*pos += 2;
+	question->qclass = knot_wire_read_u16(wire + i + 3);
+	//*pos += 2;
+
+	*pos += 4;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Reallocate space for RRSets.
+ *
+ * \param rrsets Space for RRSets.
+ * \param max_count Size of the space available for the RRSets.
+ * \param default_max_count Size of the space pre-allocated for the RRSets when
+ *        the response structure was initialized.
+ * \param step How much the space should be increased.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+static int knot_packet_realloc_rrsets(const knot_rrset_t ***rrsets,
+                                        short *max_count,
+                                        short default_max_count, short step)
+{
+	dbg_packet("Max count: %d, default max count: %d\n",
+	       *max_count, default_max_count);
+	int free_old = (*max_count) != default_max_count;
+	const knot_rrset_t **old = *rrsets;
+
+	short new_max_count = *max_count + step;
+	const knot_rrset_t **new_rrsets = (const knot_rrset_t **)malloc(
+		new_max_count * sizeof(knot_rrset_t *));
+	CHECK_ALLOC_LOG(new_rrsets, KNOT_ENOMEM);
+
+	memcpy(new_rrsets, *rrsets, (*max_count) * sizeof(knot_rrset_t *));
+
+	*rrsets = new_rrsets;
+	*max_count = new_max_count;
+
+	if (free_old) {
+		free(old);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static knot_rdata_t *knot_packet_parse_rdata(const uint8_t *wire,
+	size_t *pos, size_t total_size, size_t rdlength,
+	const knot_rrtype_descriptor_t *desc)
+{
+//	if (desc->type == 0) {
+//		dbg_packet("Unknown RR type.\n");
+//		return NULL;
+//	}
+
+	knot_rdata_t *rdata = knot_rdata_new();
+	if (rdata == NULL) {
+		return NULL;
+	}
+
+	int rc = knot_rdata_from_wire(rdata, wire, pos, total_size, rdlength,
+	                                desc);
+
+	if (rc != KNOT_EOK) {
+		dbg_packet("rdata_from_wire() returned: %s\n",
+		                    knot_strerror(rc));
+		knot_rdata_free(&rdata);
+		return NULL;
+	}
+
+	return rdata;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static knot_rrset_t *knot_packet_parse_rr(const uint8_t *wire, size_t *pos,
+                                              size_t size)
+{
+//	knot_rrset_t *rrset =
+//		(knot_rrset_t *)malloc(sizeof(knot_rrset_t));
+//	CHECK_ALLOC_LOG(rrset, NULL);
+	
+	dbg_packet("Parsing RR from position: %zu, total size: %zu\n",
+	                  *pos, size);
+
+	knot_dname_t *owner = knot_dname_parse_from_wire(wire, pos, size,
+	                                                     NULL);
+	dbg_packet("Created owner: %p, actual position: %zu\n", owner,
+	                  *pos);
+	if (owner == NULL) {
+		return NULL;
+	}
+
+dbg_packet_exec(
+	char *name = knot_dname_to_str(owner);
+	dbg_packet("Parsed name: %s\n", name);
+	free(name);
+);
+
+	//*remaining -= knot_dname_size(rrset->owner);
+
+	/*! @todo Get rid of the numerical constant. */
+	if (size - *pos < 10) {
+		dbg_packet("Malformed RR: Not enough data to parse RR"
+		                    " header.\n");
+		knot_dname_release(owner);
+		return NULL;
+	}
+
+	dbg_packet("Reading type from position %zu\n", *pos);
+
+	uint16_t type = knot_wire_read_u16(wire + *pos);
+	uint16_t rclass = knot_wire_read_u16(wire + *pos + 2);
+	uint32_t ttl = knot_wire_read_u32(wire + *pos + 4);
+
+	knot_rrset_t *rrset = knot_rrset_new(owner, type, rclass, ttl);
+
+	/* Owner is either referenced in rrset or rrset creation failed. */
+	knot_dname_release(owner);
+
+	/* Check rrset allocation. */
+	if (rrset == NULL) {
+		return NULL;
+	}
+
+	uint16_t rdlength = knot_wire_read_u16(wire + *pos + 8);
+
+	dbg_packet("Read RR header: type %u, class %u, ttl %u, "
+	                    "rdlength %u\n", rrset->type, rrset->rclass,
+	                    rrset->ttl, rdlength);
+
+	*pos += 10;
+
+	if (size - *pos < rdlength) {
+		dbg_packet("Malformed RR: Not enough data to parse RR"
+		                    " RDATA (size: %zu, position: %zu).\n",
+		                   size, *pos);
+		knot_rrset_deep_free(&rrset, 1, 1, 0);
+//		free(rrset);
+		return NULL;
+	}
+
+	rrset->rrsigs = NULL;
+
+	if (rdlength == 0) {
+		return rrset;
+	}
+
+	// parse RDATA
+	knot_rdata_t *rdata = knot_packet_parse_rdata(wire, pos, size,
+	                         rdlength,
+	                         knot_rrtype_descriptor_by_type(rrset->type));
+	if (rdata == NULL) {
+		dbg_packet("Malformed RR: Could not parse RDATA.\n");
+		knot_rrset_deep_free(&rrset, 1, 1, 0);
+//		free(rrset);
+		return NULL;
+	}
+
+	if (knot_rrset_add_rdata(rrset, rdata) != KNOT_EOK) {
+		dbg_packet("Malformed RR: Could not add RDATA to RRSet"
+		                    ".\n");
+		knot_rdata_free(&rdata);
+		knot_rrset_deep_free(&rrset, 1, 1, 0);
+//		free(rrset);
+		return NULL;
+	}
+
+	return rrset;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_packet_add_rrset(knot_rrset_t *rrset,
+                                   const knot_rrset_t ***rrsets,
+                                   short *rrset_count,
+                                   short *max_rrsets,
+                                   short default_rrsets,
+                                   const knot_packet_t *packet,
+                                   knot_packet_duplicate_handling_t dupl)
+{
+
+	assert(rrset != NULL);
+	assert(rrsets != NULL);
+	assert(rrset_count != NULL);
+	assert(max_rrsets != NULL);
+
+dbg_packet_exec(
+	char *name = knot_dname_to_str(rrset->owner);
+	dbg_packet("packet_add_rrset(), owner: %s, type: %s\n",
+	                    name, knot_rrtype_to_string(rrset->type));
+	free(name);
+);
+
+	if (*rrset_count == *max_rrsets
+	    && knot_packet_realloc_rrsets(rrsets, max_rrsets, default_rrsets,
+	                                    STEP_ANCOUNT) != KNOT_EOK) {
+		return KNOT_ENOMEM;
+	}
+
+	if (dupl == KNOT_PACKET_DUPL_SKIP &&
+	    knot_packet_contains(packet, rrset, KNOT_RRSET_COMPARE_PTR)) {
+		/*! \todo This should also return > 0, as it means that the
+		          RRSet was not used actually. */
+		return KNOT_EOK;
+	}
+
+	if (dupl == KNOT_PACKET_DUPL_MERGE) {
+		// try to find the RRSet in this array of RRSets
+		for (int i = 0; i < *rrset_count; ++i) {
+
+dbg_packet_exec(
+			char *name = knot_dname_to_str((*rrsets)[i]->owner);
+			dbg_packet("Comparing to RRSet: owner: %s, "
+			                    "type: %s\n", name,
+			                    knot_rrtype_to_string(
+			                        (*rrsets)[i]->type));
+			free(name);
+);
+
+			if (knot_rrset_compare((*rrsets)[i], rrset,
+			                         KNOT_RRSET_COMPARE_HEADER)) {
+				//const knot_rrset_t *r = (*rrsets)
+				/*! \todo Test this!!! */
+				int rc = knot_rrset_merge(
+				    (void **)((*rrsets) + i), (void **)&rrset);
+				if (rc != KNOT_EOK) {
+					return rc;
+				}
+				return 1;
+			}
+		}
+	}
+
+	(*rrsets)[*rrset_count] = rrset;
+	++(*rrset_count);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_packet_parse_rrs(const uint8_t *wire, size_t *pos,
+                                   size_t size, uint16_t rr_count,
+                                   const knot_rrset_t ***rrsets,
+                                   short *rrset_count, short *max_rrsets,
+                                   short default_rrsets,
+                                   knot_packet_t *packet)
+{
+	assert(pos != NULL);
+	assert(wire != NULL);
+	assert(rrsets != NULL);
+	assert(rrset_count != NULL);
+	assert(max_rrsets != NULL);
+	assert(packet != NULL);
+
+	dbg_packet("Parsing RRSets starting on position: %zu\n",
+	                    *pos);
+
+//	if (*rrsets == NULL) {
+//		knot_packet_realloc_rrsets(rrsets, max_rrsets, 0, 1);
+//	}
+
+	/*
+	 * The RRs from one RRSet may be scattered in the current section.
+	 * We must parse all RRs separately and try to add them to already
+	 * parsed RRSets.
+	 */
+	int err = KNOT_EOK;
+	knot_rrset_t *rrset = NULL;
+
+	for (int i = 0; i < rr_count; ++i) {
+		rrset = knot_packet_parse_rr(wire, pos, size);
+		if (rrset == NULL) {
+			dbg_packet("Failed to parse RR!\n");
+			err = KNOT_EMALF;
+			break;
+		}
+
+		err = knot_packet_add_rrset(rrset, rrsets, rrset_count,
+		                             max_rrsets, default_rrsets, packet,
+		                             KNOT_PACKET_DUPL_MERGE);
+		if (err < 0) {
+			break;
+		} else if (err > 0) {	// merged
+			dbg_packet("RRSet merged, freeing.\n");
+			knot_rrset_deep_free(&rrset, 1, 0, 0);  // TODO: ok??
+			continue;
+		}
+
+		err = knot_packet_add_tmp_rrset(packet, rrset);
+		if (err != KNOT_EOK) {
+			// remove the last RRSet from the list of RRSets
+			// - just decrement the count
+			--(*rrset_count);
+			knot_rrset_deep_free(&rrset, 1, 1, 1);
+			break;
+		}
+	}
+
+	return (err < 0) ? err : KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Deallocates all space which was allocated additionally to the
+ *        pre-allocated space of the response structure.
+ *
+ * \param resp Response structure that holds pointers to the allocated space.
+ */
+static void knot_packet_free_allocated_space(knot_packet_t *pkt)
+{
+	dbg_packet("Freeing additional space in packet.\n");
+	if (pkt->prealloc_type == KNOT_PACKET_PREALLOC_NONE) {
+		dbg_packet("Freeing QNAME.\n");
+		knot_dname_release(pkt->question.qname);
+	}
+
+	if (pkt->max_an_rrsets > DEFAULT_RRSET_COUNT(ANCOUNT, pkt)) {
+		free(pkt->answer);
+	}
+	if (pkt->max_ns_rrsets > DEFAULT_RRSET_COUNT(NSCOUNT, pkt)) {
+		free(pkt->authority);
+	}
+	if (pkt->max_ar_rrsets > DEFAULT_RRSET_COUNT(ARCOUNT, pkt)) {
+		free(pkt->additional);
+	}
+
+	if (pkt->compression.max > DEFAULT_DOMAINS_IN_RESPONSE) {
+		free(pkt->compression.dnames);
+		free(pkt->compression.offsets);
+	}
+
+	if (pkt->tmp_rrsets_max > DEFAULT_RRSET_COUNT(TMP_RRSETS, pkt)) {
+		free(pkt->tmp_rrsets);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_packet_parse_rr_sections(knot_packet_t *packet,
+                                           size_t *pos)
+{
+	assert(packet != NULL);
+	assert(packet->wireformat != NULL);
+	assert(packet->size > 0);
+	assert(pos != NULL);
+	assert(*pos > 0);
+
+	int err;
+
+	dbg_packet("Parsing Answer RRs...\n");
+	if ((err = knot_packet_parse_rrs(packet->wireformat, pos,
+	   packet->size, packet->header.ancount, &packet->answer,
+	   &packet->an_rrsets, &packet->max_an_rrsets,
+	   DEFAULT_RRSET_COUNT(ANCOUNT, packet), packet)) != KNOT_EOK) {
+		return err;
+	}
+
+	dbg_packet("Parsing Authority RRs...\n");
+	if ((err = knot_packet_parse_rrs(packet->wireformat, pos,
+	   packet->size, packet->header.nscount, &packet->authority,
+	   &packet->ns_rrsets, &packet->max_ns_rrsets,
+	   DEFAULT_RRSET_COUNT(NSCOUNT, packet), packet)) != KNOT_EOK) {
+		return err;
+	}
+
+	dbg_packet("Parsing Additional RRs...\n");
+	if ((err = knot_packet_parse_rrs(packet->wireformat, pos,
+	   packet->size, packet->header.arcount, &packet->additional,
+	   &packet->ar_rrsets, &packet->max_ar_rrsets,
+	   DEFAULT_RRSET_COUNT(ARCOUNT, packet), packet)) != KNOT_EOK) {
+		return err;
+	}
+
+	dbg_packet("Trying to find OPT RR in the packet.\n");
+
+	for (int i = 0; i < packet->ar_rrsets; ++i) {
+		assert(packet->additional[i] != NULL);
+		if (knot_rrset_type(packet->additional[i])
+		    == KNOT_RRTYPE_OPT) {
+			dbg_packet("Found OPT RR, filling.\n");
+			err = knot_edns_new_from_rr(&packet->opt_rr,
+			                              packet->additional[i]);
+			if (err != KNOT_EOK) {
+				return err;
+			}
+			break;
+		}
+	}
+
+	packet->parsed = *pos;
+
+	if (*pos < packet->size) {
+		// some trailing garbage; ignore, but log
+		dbg_response("Packet: %zu bytes of trailing garbage "
+		                      "in packet.\n", packet->size - (*pos));
+		return KNOT_EMALF;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_packet_t *knot_packet_new(knot_packet_prealloc_type_t prealloc)
+{
+	knot_packet_t *pkt;
+	void (*init_pointers)(knot_packet_t *pkt) = NULL;
+	size_t size = 0;
+
+	switch (prealloc) {
+	case KNOT_PACKET_PREALLOC_NONE:
+		size = sizeof(knot_packet_t);
+		break;
+	case KNOT_PACKET_PREALLOC_QUERY:
+		size = PREALLOC_QUERY;
+		init_pointers = knot_packet_init_pointers_query;
+		break;
+	case KNOT_PACKET_PREALLOC_RESPONSE:
+		size = PREALLOC_RESPONSE;
+		init_pointers = knot_packet_init_pointers_response;
+		break;
+	}
+
+	pkt = (knot_packet_t *)malloc(size);
+	CHECK_ALLOC_LOG(pkt, NULL);
+	memset(pkt, 0, size);
+	if (init_pointers != NULL) {
+		init_pointers(pkt);
+	}
+
+	pkt->prealloc_type = prealloc;
+
+	// set EDNS version to not supported
+	pkt->opt_rr.version = EDNS_NOT_SUPPORTED;
+
+	return pkt;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_parse_from_wire(knot_packet_t *packet,
+                                  const uint8_t *wireformat, size_t size,
+                                  int question_only)
+{
+	if (packet == NULL || wireformat == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int err;
+
+	// save the wireformat in the packet
+	// TODO: can we just save the pointer, or we have to copy the data??
+	assert(packet->wireformat == NULL);
+	packet->wireformat = (uint8_t*)wireformat;
+	packet->size = size;
+	packet->free_wireformat = 0;
+
+	//uint8_t *pos = wireformat;
+	size_t pos = 0;
+	//size_t remaining = size;
+
+	dbg_packet("Parsing wire format of packet (size %zu).\nHeader\n",
+	                  size);
+	if ((err = knot_packet_parse_header(wireformat, &pos, size,
+	                                      &packet->header)) != KNOT_EOK) {
+		return err;
+	}
+
+	packet->parsed = pos;
+
+	dbg_packet("Question (prealloc type: %d)...\n", packet->prealloc_type);
+
+	if (packet->header.qdcount > 1) {
+		dbg_packet("QDCOUNT larger than 1, FORMERR.\n");
+		return KNOT_EMALF;
+	}
+
+	knot_packet_dump(packet);
+
+	if (packet->header.qdcount == 1) {
+		if ((err = knot_packet_parse_question(wireformat, &pos, size,
+		             &packet->question, packet->prealloc_type 
+		                                == KNOT_PACKET_PREALLOC_NONE)
+		     ) != KNOT_EOK) {
+			return err;
+		}
+		packet->parsed = pos;
+	}
+
+	knot_packet_dump(packet);
+
+	if (question_only) {
+		return KNOT_EOK;
+	}
+
+	/*! \todo Replace by call to parse_rest()? */
+	err = knot_packet_parse_rr_sections(packet, &pos);
+
+#ifdef KNOT_PACKET_DEBUG
+	knot_packet_dump(packet);
+#endif /* KNOT_RESPONSE_DEBUG */
+
+	return err;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_parse_rest(knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+//	if (packet->parsed >= packet->size) {
+//		return KNOT_EOK;
+//	}
+
+	if (packet->parsed == packet->size) {
+		return KNOT_EOK;
+	}
+	
+	size_t pos = packet->parsed;
+
+	return knot_packet_parse_rr_sections(packet, &pos);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_parse_next_rr_answer(knot_packet_t *packet,
+                                       knot_rrset_t **rr)
+{
+	if (packet == NULL || rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	*rr = NULL;
+
+	if (packet->parsed >= packet->size) {
+		assert(packet->an_rrsets <= packet->header.ancount);
+		if (packet->an_rrsets != packet->header.ancount) {
+			dbg_packet("Parsed less RRs than expected.\n");
+			return KNOT_EMALF;
+		} else {
+			dbg_packet("Whole packet parsed\n");
+			return KNOT_EOK;
+		}
+	}
+
+	if (packet->an_rrsets == packet->header.ancount) {
+		assert(packet->parsed < packet->size);
+		//dbg_packet("Trailing garbage, ignoring...\n");
+		// there may be other data in the packet 
+		// (authority or additional).
+		return KNOT_EOK;
+	}
+
+	size_t pos = packet->parsed;
+
+	dbg_packet("Parsing next Answer RR (pos: %zu)...\n", pos);
+	*rr = knot_packet_parse_rr(packet->wireformat, &pos, packet->size);
+	if (*rr == NULL) {
+		dbg_packet("Failed to parse RR!\n");
+		return KNOT_EMALF;
+	}
+	
+	dbg_packet("Parsed. Pos: %zu.\n", pos);
+
+	packet->parsed = pos;
+	// increment the number of answer RRSets, though there are no saved
+	// in the packet; it is OK, because packet->answer is NULL
+	++packet->an_rrsets;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_parse_next_rr_additional(knot_packet_t *packet,
+                                         knot_rrset_t **rr)
+{
+	/*! \todo Implement. */
+	if (packet == NULL || rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	*rr = NULL;
+
+	if (packet->parsed >= packet->size) {
+		assert(packet->ar_rrsets <= packet->header.arcount);
+		if (packet->ar_rrsets != packet->header.arcount) {
+			dbg_packet("Parsed less RRs than expected.\n");
+			return KNOT_EMALF;
+		} else {
+			dbg_packet("Whole packet parsed\n");
+			return KNOT_EOK;
+		}
+	}
+
+	if (packet->ar_rrsets == packet->header.arcount) {
+		assert(packet->parsed < packet->size);
+		dbg_packet("Trailing garbage, ignoring...\n");
+		/*! \todo Do not ignore. */
+		return KNOT_EOK;
+	}
+
+	size_t pos = packet->parsed;
+
+	dbg_packet("Parsing next Additional RR (pos: %zu)...\n", pos);
+	*rr = knot_packet_parse_rr(packet->wireformat, &pos, packet->size);
+	if (*rr == NULL) {
+		dbg_packet("Failed to parse RR!\n");
+		return KNOT_EMALF;
+	}
+	
+	dbg_packet("Parsed. Pos: %zu.\n", pos);
+
+	packet->parsed = pos;
+	// increment the number of answer RRSets, though there are no saved
+	// in the packet; it is OK, because packet->answer is NULL
+	++packet->ar_rrsets;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+size_t knot_packet_size(const knot_packet_t *packet)
+{
+	return packet->size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+size_t knot_packet_question_size(const knot_packet_t *packet)
+{
+	return (KNOT_WIRE_HEADER_SIZE + 4
+	        + knot_dname_size(packet->question.qname));
+}
+
+/*----------------------------------------------------------------------------*/
+
+size_t knot_packet_parsed(const knot_packet_t *packet)
+{
+	return packet->parsed;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_set_max_size(knot_packet_t *packet, int max_size)
+{
+	if (packet == NULL || max_size <= 0) {
+		return KNOT_EBADARG;
+	}
+
+	if (packet->max_size < max_size) {
+		// reallocate space for the wire format (and copy anything
+		// that might have been there before
+		uint8_t *wire_new = (uint8_t *)malloc(max_size);
+		if (wire_new == NULL) {
+			return KNOT_ENOMEM;
+		}
+
+		uint8_t *wire_old = packet->wireformat;
+
+		memcpy(wire_new, packet->wireformat, packet->max_size);
+		packet->wireformat = wire_new;
+
+		if (packet->max_size > 0 && packet->free_wireformat) {
+			free(wire_old);
+		}
+
+		packet->free_wireformat = 1;
+	}
+
+	// set max size
+	packet->max_size = max_size;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_packet_id(const knot_packet_t *packet)
+{
+	assert(packet != NULL);
+	return packet->header.id;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_set_id(knot_packet_t *packet, uint16_t id)
+{
+	if (packet == NULL) {
+		return;
+	}
+
+	packet->header.id = id;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_set_random_id(knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return;
+	}
+
+	packet->header.id = knot_random_id();
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint8_t knot_packet_opcode(const knot_packet_t *packet)
+{
+	assert(packet != NULL);
+	return knot_wire_flags_get_opcode(packet->header.flags1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_packet_qname(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return NULL;
+	}
+
+	return packet->question.qname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_packet_qtype(const knot_packet_t *packet)
+{
+	assert(packet != NULL);
+	return packet->question.qtype;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_set_qtype(knot_packet_t *packet, knot_rr_type_t qtype)
+{
+	assert(packet != NULL);
+	packet->question.qtype = qtype;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_packet_qclass(const knot_packet_t *packet)
+{
+	assert(packet != NULL);
+	return packet->question.qclass;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_is_query(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return (knot_wire_flags_get_qr(packet->header.flags1) == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_packet_t *knot_packet_query(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return NULL;
+	}
+
+	return packet->query;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_rcode(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	return knot_wire_flags_get_rcode(packet->header.flags2);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_tc(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	return knot_wire_flags_get_tc(packet->header.flags1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_qdcount(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->header.qdcount;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_ancount(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->header.ancount;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_nscount(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->header.nscount;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_arcount(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->header.arcount;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_set_tsig_size(knot_packet_t *packet, size_t tsig_size)
+{
+	packet->tsig_size = tsig_size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_packet_answer_rrset_count(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->an_rrsets;
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_packet_authority_rrset_count(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->ns_rrsets;
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_packet_additional_rrset_count(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return packet->ar_rrsets;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t *knot_packet_answer_rrset(
+	const knot_packet_t *packet, short pos)
+{
+	if (packet == NULL || pos > packet->an_rrsets) {
+		return NULL;
+	}
+
+	return packet->answer[pos];
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t *knot_packet_authority_rrset(
+	knot_packet_t *packet, short pos)
+{
+	if (packet == NULL || pos > packet->ns_rrsets) {
+		return NULL;
+	}
+
+	return packet->authority[pos];
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t *knot_packet_additional_rrset(
+	knot_packet_t *packet, short pos)
+{
+	if (packet == NULL || pos > packet->ar_rrsets) {
+		return NULL;
+	}
+
+	return packet->additional[pos];
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_contains(const knot_packet_t *packet,
+                           const knot_rrset_t *rrset,
+                           knot_rrset_compare_type_t cmp)
+{
+	if (packet == NULL || rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	for (int i = 0; i < packet->header.ancount; ++i) {
+		if (knot_rrset_compare(packet->answer[i], rrset, cmp)) {
+			return 1;
+		}
+	}
+
+	for (int i = 0; i < packet->header.nscount; ++i) {
+		if (knot_rrset_compare(packet->authority[i], rrset, cmp)) {
+			return 1;
+		}
+	}
+
+	for (int i = 0; i < packet->header.arcount; ++i) {
+		if (knot_rrset_compare(packet->additional[i], rrset, cmp)) {
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_add_tmp_rrset(knot_packet_t *packet,
+                                knot_rrset_t *tmp_rrset)
+{
+	if (packet == NULL || tmp_rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (packet->tmp_rrsets_count == packet->tmp_rrsets_max
+	    && knot_packet_realloc_rrsets(&packet->tmp_rrsets,
+			&packet->tmp_rrsets_max,
+			DEFAULT_RRSET_COUNT(TMP_RRSETS, packet),
+			STEP_TMP_RRSETS) != KNOT_EOK) {
+		return KNOT_ENOMEM;
+	}
+
+	packet->tmp_rrsets[packet->tmp_rrsets_count++] = tmp_rrset;
+	dbg_packet("Current tmp RRSets count: %d, max count: %d\n",
+	                    packet->tmp_rrsets_count, packet->tmp_rrsets_max);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Frees all temporary RRSets stored in the response structure.
+ *
+ * \param resp Response structure to free the temporary RRSets from.
+ */
+void knot_packet_free_tmp_rrsets(knot_packet_t *pkt)
+{
+	if (pkt == NULL) {
+		return;
+	}
+
+	for (int i = 0; i < pkt->tmp_rrsets_count; ++i) {
+dbg_packet_exec(
+		char *name = knot_dname_to_str(
+			(((knot_rrset_t **)(pkt->tmp_rrsets))[i])->owner);
+		dbg_packet("Freeing tmp RRSet on ptr: %p (ptr to ptr:"
+		       " %p, type: %s, owner: %s)\n",
+		       (((knot_rrset_t **)(pkt->tmp_rrsets))[i]),
+		       &(((knot_rrset_t **)(pkt->tmp_rrsets))[i]),
+		       knot_rrtype_to_string(
+		            (((knot_rrset_t **)(pkt->tmp_rrsets))[i])->type),
+		       name);
+		free(name);
+);
+		// TODO: this is quite ugly, but better than copying whole
+		// function (for reallocating rrset array)
+		knot_rrset_deep_free(
+			&(((knot_rrset_t **)(pkt->tmp_rrsets))[i]), 1, 1, 1);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_header_to_wire(const knot_header_t *header,
+                                  uint8_t **pos, size_t *size)
+{
+	if (header == NULL || pos == NULL || *pos == NULL || size == NULL) {
+		return;
+	}
+
+	knot_wire_set_id(*pos, header->id);
+	knot_wire_set_flags1(*pos, header->flags1);
+	knot_wire_set_flags2(*pos, header->flags2);
+	knot_wire_set_qdcount(*pos, header->qdcount);
+	knot_wire_set_ancount(*pos, header->ancount);
+	knot_wire_set_nscount(*pos, header->nscount);
+	knot_wire_set_arcount(*pos, header->arcount);
+
+	*pos += KNOT_WIRE_HEADER_SIZE;
+	*size += KNOT_WIRE_HEADER_SIZE;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_question_to_wire(knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (packet->size > KNOT_WIRE_HEADER_SIZE) {
+		return KNOT_ERROR;
+	}
+
+	// TODO: get rid of the numeric constants
+	size_t qsize = 4 + knot_dname_size(packet->question.qname);
+	if (qsize > packet->max_size - KNOT_WIRE_HEADER_SIZE) {
+		return KNOT_ESPACE;
+	}
+
+	// create the wireformat of Question
+	uint8_t *pos = packet->wireformat + KNOT_WIRE_HEADER_SIZE;
+	memcpy(pos, knot_dname_name(packet->question.qname),
+	       knot_dname_size(packet->question.qname));
+
+	pos += knot_dname_size(packet->question.qname);
+	knot_wire_write_u16(pos, packet->question.qtype);
+	pos += 2;
+	knot_wire_write_u16(pos, packet->question.qclass);
+
+//	int err = 0;
+	// TODO: put the qname into the compression table
+//	// TODO: get rid of the numeric constants
+//	if ((err = knot_response_store_dname_pos(&packet->compression,
+//	              packet->question.qname,0, 12, 12)) != KNOT_EOK) {
+//		return err;
+//	}
+
+	packet->size += knot_dname_size(packet->question.qname) + 4;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_edns_to_wire(knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	packet->size += knot_edns_to_wire(&packet->opt_rr,
+	                                  packet->wireformat + packet->size,
+	                                  packet->max_size - packet->size);
+
+	packet->header.arcount += 1;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_packet_to_wire(knot_packet_t *packet,
+                          uint8_t **wire, size_t *wire_size)
+{
+	if (packet == NULL || wire == NULL || wire_size == NULL
+	    || *wire != NULL) {
+		return KNOT_EBADARG;
+	}
+
+	assert(packet->size <= packet->max_size);
+
+	// if there are no additional RRSets, add EDNS OPT RR
+	if (packet->header.arcount == 0
+	    && packet->opt_rr.version != EDNS_NOT_SUPPORTED) {
+	    knot_packet_edns_to_wire(packet);
+	}
+
+	// set QDCOUNT (in response it is already set, in query it is needed)
+	knot_wire_set_qdcount(packet->wireformat, packet->header.qdcount);
+	// set ANCOUNT to the packet
+	knot_wire_set_ancount(packet->wireformat, packet->header.ancount);
+	// set NSCOUNT to the packet
+	knot_wire_set_nscount(packet->wireformat, packet->header.nscount);
+	// set ARCOUNT to the packet
+	knot_wire_set_arcount(packet->wireformat, packet->header.arcount);
+
+	//assert(response->size == size);
+	*wire = packet->wireformat;
+	*wire_size = packet->size;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const uint8_t *knot_packet_wireformat(const knot_packet_t *packet)
+{
+	return packet->wireformat;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_free(knot_packet_t **packet)
+{
+	if (packet == NULL || *packet == NULL) {
+		return;
+	}
+
+	// free temporary domain names
+	dbg_packet("Freeing tmp RRSets...\n");
+	knot_packet_free_tmp_rrsets(*packet);
+
+	// check if some additional space was allocated for the packet
+	dbg_packet("Freeing additional allocated space...\n");
+	knot_packet_free_allocated_space(*packet);
+
+	// free the space for wireformat
+//	assert((*packet)->wireformat != NULL);
+//	free((*packet)->wireformat);
+	if ((*packet)->wireformat != NULL && (*packet)->free_wireformat) {
+		free((*packet)->wireformat);
+	}
+
+	dbg_packet("Freeing packet structure\n");
+	free(*packet);
+	*packet = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+#ifdef KNOT_PACKET_DEBUG
+static void knot_packet_dump_rrsets(const knot_rrset_t **rrsets,
+                                      int count)
+{
+	assert((rrsets != NULL && *rrsets != NULL) || count < 1);
+
+	for (int i = 0; i < count; ++i) {
+		knot_rrset_dump(rrsets[i], 0);
+	}
+}
+#endif
+/*----------------------------------------------------------------------------*/
+
+void knot_packet_dump(const knot_packet_t *packet)
+{
+	if (packet == NULL) {
+		return;
+	}
+
+#ifdef KNOT_PACKET_DEBUG
+	dbg_packet("DNS packet:\n-----------------------------\n");
+
+	dbg_packet("\nHeader:\n");
+	dbg_packet("  ID: %u", packet->header.id);
+	dbg_packet("  FLAGS: %s %s %s %s %s %s %s\n",
+	       knot_wire_flags_get_qr(packet->header.flags1) ? "qr" : "",
+	       knot_wire_flags_get_aa(packet->header.flags1) ? "aa" : "",
+	       knot_wire_flags_get_tc(packet->header.flags1) ? "tc" : "",
+	       knot_wire_flags_get_rd(packet->header.flags1) ? "rd" : "",
+	       knot_wire_flags_get_ra(packet->header.flags2) ? "ra" : "",
+	       knot_wire_flags_get_ad(packet->header.flags2) ? "ad" : "",
+	       knot_wire_flags_get_cd(packet->header.flags2) ? "cd" : "");
+	dbg_packet("  QDCOUNT: %u\n", packet->header.qdcount);
+	dbg_packet("  ANCOUNT: %u\n", packet->header.ancount);
+	dbg_packet("  NSCOUNT: %u\n", packet->header.nscount);
+	dbg_packet("  ARCOUNT: %u\n", packet->header.arcount);
+
+	if (knot_packet_qdcount(packet) > 0) {
+		dbg_packet("\nQuestion:\n");
+		char *qname = knot_dname_to_str(packet->question.qname);
+		dbg_packet("  QNAME: %s\n", qname);
+		free(qname);
+		dbg_packet("  QTYPE: %u (%s)\n", packet->question.qtype,
+		       knot_rrtype_to_string(packet->question.qtype));
+		dbg_packet("  QCLASS: %u (%s)\n", packet->question.qclass,
+		       knot_rrclass_to_string(packet->question.qclass));
+	}
+
+	dbg_packet("\nAnswer RRSets:\n");
+	knot_packet_dump_rrsets(packet->answer, packet->an_rrsets);
+	dbg_packet("\nAuthority RRSets:\n");
+	knot_packet_dump_rrsets(packet->authority, packet->ns_rrsets);
+	dbg_packet("\nAdditional RRSets:\n");
+	knot_packet_dump_rrsets(packet->additional, packet->ar_rrsets);
+
+	/*! \todo Dumping of Answer, Authority and Additional sections. */
+
+	dbg_packet("\nEDNS:\n");
+	dbg_packet("  Version: %u\n", packet->opt_rr.version);
+	dbg_packet("  Payload: %u\n", packet->opt_rr.payload);
+	dbg_packet("  Extended RCODE: %u\n",
+	                      packet->opt_rr.ext_rcode);
+
+	dbg_packet("\nPacket size: %zu\n", packet->size);
+	dbg_packet("\n-----------------------------\n");
+#endif
+}
+
diff --git a/src/libknot/packet/packet.h b/src/libknot/packet/packet.h
new file mode 100644
index 0000000..1bf74a9
--- /dev/null
+++ b/src/libknot/packet/packet.h
@@ -0,0 +1,538 @@
+/*!
+ * \file packet.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Structure for holding DNS packet data and metadata.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_PACKET_H_
+#define _KNOT_PACKET_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "dname.h"
+#include "rrset.h"
+#include "edns.h"
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure for holding information needed for compressing domain names.
+ *
+ * It's a simple table of domain names and their offsets in wire format of the
+ * packet.
+ *
+ * \todo Consider using some better lookup structure, such as skip-list.
+ */
+struct knot_compressed_dnames {
+	const knot_dname_t **dnames;  /*!< Domain names present in packet. */
+	size_t *offsets;          /*!< Offsets of domain names in the packet. */
+	short count;              /*!< Count of items in the previous arrays. */
+	short max;                /*!< Capacity of the structure (allocated). */
+};
+
+typedef struct knot_compressed_dnames knot_compressed_dnames_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure representing the DNS packet header.
+ */
+struct knot_header {
+	uint16_t id;      /*!< ID stored in host byte order. */
+	uint8_t flags1;   /*!< First octet of header flags. */
+	uint8_t flags2;   /*!< Second octet of header flags. */
+	uint16_t qdcount; /*!< Number of Question RRs, in host byte order. */
+	uint16_t ancount; /*!< Number of Answer RRs, in host byte order. */
+	uint16_t nscount; /*!< Number of Authority RRs, in host byte order. */
+	uint16_t arcount; /*!< Number of Additional RRs, in host byte order. */
+};
+
+typedef struct knot_header knot_header_t;
+
+/*!
+ * \brief Structure representing one Question entry in the DNS packet.
+ */
+struct knot_question {
+	knot_dname_t *qname;  /*!< Question domain name. */
+	uint16_t qtype;         /*!< Question TYPE. */
+	uint16_t qclass;        /*!< Question CLASS. */
+};
+
+typedef struct knot_question knot_question_t;
+
+enum knot_packet_prealloc_type {
+	KNOT_PACKET_PREALLOC_NONE,
+	KNOT_PACKET_PREALLOC_QUERY,
+	KNOT_PACKET_PREALLOC_RESPONSE
+};
+
+typedef enum knot_packet_prealloc_type knot_packet_prealloc_type_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure representing a DNS packet.
+ *
+ * \note QNAME, Answer, Authority and Additonal sections are by default put to
+ *       preallocated space after the structure with default sizes. If the
+ *       space is not enough, more space is allocated dynamically.
+ */
+struct knot_packet {
+	/*! \brief DNS header. */
+	knot_header_t header;
+
+	/*!
+	 * \brief Question section.
+	 *
+	 * \note Only one Question is supported!
+	 */
+	knot_question_t question;
+
+	uint8_t *owner_tmp;  /*!< Allocated space for RRSet owner wire format.*/
+
+	const knot_rrset_t **answer;      /*!< Answer RRSets. */
+	const knot_rrset_t **authority;   /*!< Authority RRSets. */
+	const knot_rrset_t **additional;  /*!< Additional RRSets. */
+
+	short an_rrsets;     /*!< Count of Answer RRSets in the response. */
+	short ns_rrsets;     /*!< Count of Authority RRSets in the response. */
+	short ar_rrsets;     /*!< Count of Additional RRSets in the response. */
+
+	short max_an_rrsets; /*!< Allocated space for Answer RRsets. */
+	short max_ns_rrsets; /*!< Allocated space for Authority RRsets. */
+	short max_ar_rrsets; /*!< Allocated space for Additional RRsets. */
+
+	knot_opt_rr_t opt_rr;     /*!< OPT RR included in the packet. */
+
+	uint8_t *wireformat;  /*!< Wire format of the packet. */
+
+	short free_wireformat;
+	size_t parsed;
+
+	size_t size;      /*!< Current wire size of the packet. */
+	size_t max_size;  /*!< Maximum allowed size of the packet. */
+
+	/*! \brief Information needed for compressing domain names in packet. */
+	knot_compressed_dnames_t compression;
+
+	/*! \brief RRSets to be destroyed with the packet structure. */
+	const knot_rrset_t **tmp_rrsets;
+	short tmp_rrsets_count;  /*!< Count of temporary RRSets. */
+	short tmp_rrsets_max;    /*!< Allocated space for temporary RRSets. */
+
+	struct knot_packet *query; /*!< Associated query. */
+
+	knot_packet_prealloc_type_t prealloc_type;
+	
+	size_t tsig_size;	/*!< Space to reserve for the TSIG RR. */
+};
+
+typedef struct knot_packet knot_packet_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Default sizes for response structure parts and steps for increasing
+ *        them.
+ */
+enum {
+	DEFAULT_ANCOUNT = 6,         /*!< Default count of Answer RRSets. */
+	DEFAULT_NSCOUNT = 8,         /*!< Default count of Authority RRSets. */
+	DEFAULT_ARCOUNT = 28,        /*!< Default count of Additional RRSets. */
+
+	DEFAULT_ANCOUNT_QUERY = 1,   /*!< Default count of Answer RRSets. */
+	DEFAULT_NSCOUNT_QUERY = 0,   /*!< Default count of Authority RRSets. */
+	DEFAULT_ARCOUNT_QUERY = 1,  /*!< Default count of Additional RRSets. */
+	/*!
+	 * \brief Default count of all domain names in response.
+	 *
+	 * Used for compression table.
+	 */
+	DEFAULT_DOMAINS_IN_RESPONSE = 22,
+
+	/*! \brief Default count of temporary RRSets stored in response. */
+	DEFAULT_TMP_RRSETS = 5,
+
+	/*! \brief Default count of temporary RRSets stored in query. */
+	DEFAULT_TMP_RRSETS_QUERY = 2,
+
+	STEP_ANCOUNT = 6, /*!< Step for increasing space for Answer RRSets. */
+	STEP_NSCOUNT = 8, /*!< Step for increasing space for Authority RRSets.*/
+	STEP_ARCOUNT = 8,/*!< Step for increasing space for Additional RRSets.*/
+	STEP_DOMAINS = 10,   /*!< Step for resizing compression table. */
+	STEP_TMP_RRSETS = 5  /*!< Step for increasing temorary RRSets count. */
+};
+
+/*----------------------------------------------------------------------------*/
+#define PREALLOC_RRSETS(count) (count * sizeof(knot_rrset_t *))
+
+/*! \brief Sizes for preallocated space in the response structure. */
+enum {
+	/*! \brief Size of the response structure itself. */
+	PREALLOC_PACKET = sizeof(knot_packet_t),
+	/*! \brief Space for QNAME dname structure. */
+	PREALLOC_QNAME_DNAME = sizeof(knot_dname_t),
+	/*! \brief Space for QNAME name (maximum domain name size). */
+	PREALLOC_QNAME_NAME = 256,
+	/*! \brief Space for QNAME labels (maximum label count). */
+	PREALLOC_QNAME_LABELS = 127,
+	/*! \brief Total space for QNAME. */
+	PREALLOC_QNAME = PREALLOC_QNAME_DNAME
+	                 + PREALLOC_QNAME_NAME
+	                 + PREALLOC_QNAME_LABELS,
+	/*!
+	 * \brief Space for RR owner wire format.
+	 *
+	 * Temporary buffer, used when putting RRSets to the response.
+	 */
+	PREALLOC_RR_OWNER = 256,
+
+//	/*! \brief Space for Answer RRSets. */
+//	PREALLOC_ANSWER = DEFAULT_ANCOUNT * sizeof(knot_dname_t *),
+//	/*! \brief Space for Authority RRSets. */
+//	PREALLOC_AUTHORITY = DEFAULT_NSCOUNT * sizeof(knot_dname_t *),
+//	/*! \brief Space for Additional RRSets. */
+//	PREALLOC_ADDITIONAL = DEFAULT_ARCOUNT * sizeof(knot_dname_t *),
+//	/*! \brief Total size for Answer, Authority and Additional RRSets. */
+//	PREALLOC_RRSETS = PREALLOC_ANSWER
+//	                  + PREALLOC_AUTHORITY
+//	                  + PREALLOC_ADDITIONAL,
+	/*! \brief Space for one part of the compression table (domain names).*/
+	PREALLOC_DOMAINS =
+		DEFAULT_DOMAINS_IN_RESPONSE * sizeof(knot_dname_t *),
+	/*! \brief Space for other part of the compression table (offsets). */
+	PREALLOC_OFFSETS =
+		DEFAULT_DOMAINS_IN_RESPONSE * sizeof(size_t),
+	PREALLOC_COMPRESSION = PREALLOC_DOMAINS + PREALLOC_OFFSETS,
+
+//	/*! \brief Space for temporary RRSets. */
+//	PREALLOC_TMP_RRSETS =
+//		DEFAULT_TMP_RRSETS * sizeof(knot_rrset_t *),
+
+	PREALLOC_QUERY = PREALLOC_PACKET
+	                 + PREALLOC_QNAME
+	                 + PREALLOC_RRSETS(DEFAULT_ANCOUNT_QUERY)
+	                 + PREALLOC_RRSETS(DEFAULT_NSCOUNT_QUERY)
+	                 + PREALLOC_RRSETS(DEFAULT_ARCOUNT_QUERY)
+	                 + PREALLOC_RRSETS(DEFAULT_TMP_RRSETS_QUERY),
+
+	/*! \brief Total preallocated size for the response. */
+	PREALLOC_RESPONSE = PREALLOC_PACKET
+	                 + PREALLOC_QNAME
+	                 + PREALLOC_RR_OWNER
+	                 + PREALLOC_RRSETS(DEFAULT_ANCOUNT)
+	                 + PREALLOC_RRSETS(DEFAULT_NSCOUNT)
+	                 + PREALLOC_RRSETS(DEFAULT_ARCOUNT)
+	                 + PREALLOC_COMPRESSION
+	                 + PREALLOC_RRSETS(DEFAULT_TMP_RRSETS)
+};
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates new empty packet structure.
+ *
+ * \param prealloc What space should be preallocated in the structure.
+ *
+ * \return New packet structure or NULL if an error occured.
+ */
+knot_packet_t *knot_packet_new(knot_packet_prealloc_type_t prealloc);
+
+/*!
+ * \brief Parses the DNS packet from wire format.
+ *
+ * \param packet Packet structure to parse into.
+ * \param wireformat Wire format of the DNS packet.
+ * \param size Size of the wire format in bytes.
+ * \param question_only Set to <> 0 if you do not want to parse the whole
+ *                      packet. In such case the parsing will end after the
+ *                      Question section. Set to 0 to parse the whole packet.
+ *
+ * \retval KNOT_EOK
+ */
+int knot_packet_parse_from_wire(knot_packet_t *packet,
+                                  const uint8_t *wireformat, size_t size,
+                                  int question_only);
+
+int knot_packet_parse_rest(knot_packet_t *packet);
+
+int knot_packet_parse_next_rr_answer(knot_packet_t *packet,
+                                       knot_rrset_t **rr);
+
+int knot_packet_parse_next_rr_additional(knot_packet_t *packet,
+                                         knot_rrset_t **rr);
+
+size_t knot_packet_size(const knot_packet_t *packet);
+
+/*! \brief Returns size of the wireformat of Header and Question sections. */
+size_t knot_packet_question_size(const knot_packet_t *packet);
+
+size_t knot_packet_parsed(const knot_packet_t *packet);
+
+/*!
+ * \brief Sets the maximum size of the packet and allocates space for wire
+ *        format (if needed).
+ *
+ * This function also allocates space for the wireformat of the packet, if
+ * the given max size is larger than the current maximum size of the packet
+ * and copies the current wireformat over to the new space.
+ *
+ * \warning Do not call this function if you are not completely sure that the
+ *          current wire format of the packet fits into the new space.
+ *          It does not update the current size of the wire format, so the
+ *          produced packet may be larger than the given max size.
+ *
+ * \param packet Packet to set the maximum size of.
+ * \param max_size Maximum size of the packet in bytes.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ *
+ * \todo Needs test.
+ */
+int knot_packet_set_max_size(knot_packet_t *packet, int max_size);
+
+uint16_t knot_packet_id(const knot_packet_t *packet);
+
+void knot_packet_set_id(knot_packet_t *packet, uint16_t id);
+
+void knot_packet_set_random_id(knot_packet_t *packet);
+
+/*!
+ * \brief Returns the OPCODE of the packet.
+ *
+ * \param packet Packet (with parsed query) to get the OPCODE from.
+ *
+ * \return OPCODE stored in the packet.
+ */
+uint8_t knot_packet_opcode(const knot_packet_t *packet);
+
+/*!
+ * \brief Returns the QNAME from the packet.
+ *
+ * \param packet Packet (with parsed query) to get the QNAME from.
+ *
+ * \return QNAME stored in the packet.
+ */
+const knot_dname_t *knot_packet_qname(const knot_packet_t *packet);
+
+/*!
+ * \brief Returns the QTYPE from the packet.
+ *
+ * \param packet Packet (with parsed query) to get the QTYPE from.
+ *
+ * \return QTYPE stored in the packet.
+ */
+uint16_t knot_packet_qtype(const knot_packet_t *packet);
+
+/*!
+ * \brief Set the QTYPE of the packet.
+ *
+ * \param packet Packet containing question.
+ * \param qtype New QTYPE for question.
+ */
+void knot_packet_set_qtype(knot_packet_t *packet, knot_rr_type_t qtype);
+
+
+/*!
+ * \brief Returns the QCLASS from the packet.
+ *
+ * \param response Packet (with parsed query) to get the QCLASS from.
+ *
+ * \return QCLASS stored in the packet.
+ */
+uint16_t knot_packet_qclass(const knot_packet_t *packet);
+
+int knot_packet_is_query(const knot_packet_t *packet);
+
+const knot_packet_t *knot_packet_query(const knot_packet_t *packet);
+
+int knot_packet_rcode(const knot_packet_t *packet);
+
+int knot_packet_tc(const knot_packet_t *packet);
+
+int knot_packet_qdcount(const knot_packet_t *packet);
+
+int knot_packet_ancount(const knot_packet_t *packet);
+
+int knot_packet_nscount(const knot_packet_t *packet);
+
+int knot_packet_arcount(const knot_packet_t *packet);
+
+void knot_packet_set_tsig_size(knot_packet_t *packet, size_t tsig_size);
+
+/*!
+ * \brief Returns number of RRSets in Answer section of the packet.
+ *
+ * \param response Packet to get the Answer RRSet count from.
+ */
+short knot_packet_answer_rrset_count(const knot_packet_t *packet);
+
+/*!
+ * \brief Returns number of RRSets in Authority section of the packet.
+ *
+ * \param response Packet to get the Authority RRSet count from.
+ */
+short knot_packet_authority_rrset_count(const knot_packet_t *packet);
+
+/*!
+ * \brief Returns number of RRSets in Additional section of the packet.
+ *
+ * \param response Packet to get the Additional RRSet count from.
+ */
+short knot_packet_additional_rrset_count(const knot_packet_t *packet);
+
+/*!
+ * \brief Returns the requested Answer RRset.
+ *
+ * \param packet Packet to get the RRSet from.
+ * \param pos Position of the RRSet in the Answer section (RRSets are stored
+ *            in the order they were added to the response or parsed from the
+ *            query).
+ *
+ * \return The RRSet on position \a pos in the Answer section of \a packet
+ *         or NULL if there is no such RRSet.
+ */
+const knot_rrset_t *knot_packet_answer_rrset(
+	const knot_packet_t *packet, short pos);
+
+/*!
+ * \brief Returns the requested Authority RRset.
+ *
+ * \param packet Packet to get the RRSet from.
+ * \param pos Position of the RRSet in the Authority section (RRSets are stored
+ *            in the order they were added to the response or parsed from the
+ *            query).
+ *
+ * \return The RRSet on position \a pos in the Authority section of \a packet
+ *         or NULL if there is no such RRSet.
+ */
+const knot_rrset_t *knot_packet_authority_rrset(
+	knot_packet_t *packet, short pos);
+
+/*!
+ * \brief Returns the requested Additional RRset.
+ *
+ * \param packet Packet to get the RRSet from.
+ * \param pos Position of the RRSet in the Additional section (RRSets are stored
+ *            in the order they were added to the response or parsed from the
+ *            query).
+ *
+ * \return The RRSet on position \a pos in the Additional section of \a packet
+ *         or NULL if there is no such RRSet.
+ */
+const knot_rrset_t *knot_packet_additional_rrset(
+	knot_packet_t *packet, short pos);
+
+/*!
+ * \brief Checks if the packet already contains the given RRSet.
+ *
+ * It searches for the RRSet in the three lists of RRSets corresponding to
+ * Answer, Authority and Additional sections of the packet.
+ *
+ * \note Only pointers are compared, i.e. two instances of knot_rrset_t with
+ * the same data will be considered different.
+ *
+ * \param packet Packet to look for the RRSet in.
+ * \param rrset RRSet to look for.
+ *
+ * \retval 0 if \a resp does not contain \a rrset.
+ * \retval <> 0 if \a resp does contain \a rrset.
+ */
+int knot_packet_contains(const knot_packet_t *packet,
+                           const knot_rrset_t *rrset,
+                           knot_rrset_compare_type_t cmp);
+
+/*!
+ * \brief Adds RRSet to the list of temporary RRSets.
+ *
+ * Temporary RRSets are fully freed when the response structure is destroyed.
+ *
+ * \param response Response to which the temporary RRSet should be added.
+ * \param tmp_rrset Temporary RRSet to be stored in the response.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+int knot_packet_add_tmp_rrset(knot_packet_t *response,
+                                knot_rrset_t *tmp_rrset);
+
+void knot_packet_free_tmp_rrsets(knot_packet_t *pkt);
+
+/*!
+ * \brief Converts the header structure to wire format.
+ *
+ * \note This function also adjusts the position (\a pos) according to
+ *       the size of the converted wire format.
+ *
+ * \param[in] header DNS header structure to convert.
+ * \param[out] pos Position where to put the converted header. The space has
+ *                 to be allocated before calling this function.
+ * \param[out] size Size of the wire format of the header in bytes.
+ */
+void knot_packet_header_to_wire(const knot_header_t *header,
+                                  uint8_t **pos, size_t *size);
+
+int knot_packet_question_to_wire(knot_packet_t *packet);
+
+/*!
+ * \brief Converts the stored response OPT RR to wire format and adds it to
+ *        the response wire format.
+ *
+ * \param resp Response structure.
+ */
+int knot_packet_edns_to_wire(knot_packet_t *packet);
+
+/*!
+ * \brief Converts the packet to wire format.
+ *
+ * \param packet Packet to be converted to wire format.
+ * \param wire Here the wire format of the packet will be stored.
+ *             Space for the packet will be allocated. *resp_wire must
+ *             be set to NULL (to avoid leaks).
+ * \param wire_size The size of the packet in wire format will be stored here.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_packet_to_wire(knot_packet_t *packet, uint8_t **wire,
+                          size_t *wire_size);
+
+const uint8_t *knot_packet_wireformat(const knot_packet_t *packet);
+
+/*!
+ * \brief Properly destroys the packet structure.
+ *
+ * \param response Packet to be destroyed.
+ */
+void knot_packet_free(knot_packet_t **packet);
+
+/*!
+ * \brief Dumps the whole packet in human-readable form.
+ *
+ * \note This function is empty unless KNOT_PACKET_DEBUG is defined.
+ *
+ * \param resp Packet to dump.
+ */
+void knot_packet_dump(const knot_packet_t *packet);
+
+#endif /* _KNOT_PACKET_H_ */
+
+/*! @} */
diff --git a/src/libknot/packet/query.c b/src/libknot/packet/query.c
new file mode 100644
index 0000000..63e902a
--- /dev/null
+++ b/src/libknot/packet/query.c
@@ -0,0 +1,228 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include "packet/query.h"
+
+#include "util/error.h"
+#include "util/wire.h"
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_rr_to_wire(const knot_rrset_t *rrset, const knot_rdata_t *rdata,
+			  uint8_t **wire, uint8_t *endp)
+{
+	/* Store owner. */
+	knot_dname_t *owner = rrset->owner;
+	if (*wire + owner->size > endp) {
+		return KNOT_ENOMEM;
+	}
+	memcpy(*wire, owner->name, owner->size);
+	*wire += owner->size;
+
+	if (*wire + 10 > endp) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Write RR header. */
+	knot_wire_write_u16(*wire, rrset->type); *wire += 2;
+	knot_wire_write_u16(*wire, rrset->rclass); *wire += 2;
+	knot_wire_write_u32(*wire, rrset->ttl); *wire += 4;
+	knot_wire_write_u16(*wire, 0); *wire += 2; /* RDLENGTH reserve. */
+	uint8_t *rdlength_p = *wire - 2;
+	uint16_t rdlength = 0;
+
+	/* Write data. */
+	knot_dname_t *dname = 0;
+	uint16_t *raw_data = 0;
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(rrset->type);
+
+	for (int i = 0; i < rdata->count; ++i) {
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+
+			/* Check space for dname. */
+			dname = knot_rdata_item(rdata, i)->dname;
+			if (*wire + dname->size > endp) {
+				return KNOT_ESPACE;
+			}
+
+			/* Save domain name. */
+			memcpy(*wire, dname->name, dname->size);
+			*wire += dname->size;
+			rdlength += dname->size;
+			break;
+		default:
+			raw_data = knot_rdata_item(rdata, i)->raw_data;
+			if (*wire + raw_data[0] > endp) {
+				return KNOT_ESPACE;
+			}
+
+			/* Copy data. */
+			memcpy(*wire, raw_data + 1, raw_data[0]);
+			*wire += raw_data[0];
+			rdlength += raw_data[0];
+			break;
+
+		}
+	}
+
+	/* Store rdlength. */
+	knot_wire_write_u16(rdlength_p, rdlength);
+
+	return KNOT_EOK;
+}
+/*----------------------------------------------------------------------------*/
+
+int knot_query_dnssec_requested(const knot_packet_t *query)
+{
+	if (query == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return ((knot_edns_get_version(&query->opt_rr) != EDNS_NOT_SUPPORTED)
+	        && knot_edns_do(&query->opt_rr));
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_nsid_requested(const knot_packet_t *query)
+{
+	if (query == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return ((knot_edns_get_version(&query->opt_rr) != EDNS_NOT_SUPPORTED)
+	        && knot_edns_has_option(&query->opt_rr, EDNS_OPTION_NSID));
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_edns_supported(const knot_packet_t *query)
+{
+	if (query == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return (knot_edns_get_version(&query->opt_rr) != EDNS_NOT_SUPPORTED);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_init(knot_packet_t *query)
+{
+	if (query == NULL) {
+		return KNOT_EBADARG;
+	}
+	// set the qr bit to 0
+	knot_wire_flags_clear_qr(&query->header.flags1);
+
+	uint8_t *pos = query->wireformat;
+	knot_packet_header_to_wire(&query->header, &pos, &query->size);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_set_question(knot_packet_t *query,
+                              const knot_question_t *question)
+{
+	if (query == NULL || question == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	query->question.qname = question->qname;
+	query->question.qclass = question->qclass;
+	query->question.qtype = question->qtype;
+	query->header.qdcount = 1;
+
+	// convert the Question to wire format right away
+	knot_packet_question_to_wire(query);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_set_opcode(knot_packet_t *query, uint8_t opcode)
+{
+	if (query == NULL) {
+		return KNOT_EBADARG;
+	}
+	// set the OPCODE in the structure
+	knot_wire_flags_set_opcode(&query->header.flags1, opcode);
+	// set the OPCODE in the wire format
+	knot_wire_set_opcode(query->wireformat, opcode);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_query_add_rrset_authority(knot_packet_t *query,
+				   const knot_rrset_t *rrset)
+{
+	if (query == NULL || rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (query->ns_rrsets == query->max_ns_rrsets) {
+		size_t oldsize = query->max_ns_rrsets * sizeof(knot_rrset_t *);
+		++query->max_ns_rrsets;
+		size_t newsize = query->max_ns_rrsets * sizeof(knot_rrset_t *);
+		const knot_rrset_t ** na = malloc(newsize);
+		if (na == 0) {
+			query->max_ns_rrsets = 0;
+			return KNOT_ENOMEM;
+		} else {
+			memcpy(na, query->authority, oldsize);
+			free(query->authority);
+			query->authority = na;
+		}
+	}
+
+	/* Append to packet. */
+	query->authority[query->ns_rrsets] = rrset;
+
+	/* Write to wire. */
+	uint8_t *startp = query->wireformat + query->size;
+	uint8_t *endp = query->wireformat + query->max_size;
+	
+	assert(endp - startp > query->opt_rr.size + query->tsig_size);
+	// reserve space for OPT RR
+	endp -= query->opt_rr.size;
+	/*! \note [TSIG] reserve space for TSIG RR */
+	endp -= query->tsig_size;
+	
+	uint8_t *pos = startp;
+
+	const knot_rdata_t *rdata = 0;
+	while ((rdata = knot_rrset_rdata_next(rrset, rdata))) {
+		knot_query_rr_to_wire(rrset, rdata, &pos, endp);
+	}
+
+	size_t written = (pos - startp);
+	query->size += written;
+	++query->ns_rrsets;
+	++query->header.nscount;
+
+	return KNOT_EOK;
+}
+
diff --git a/src/libknot/packet/query.h b/src/libknot/packet/query.h
new file mode 100644
index 0000000..a979641
--- /dev/null
+++ b/src/libknot/packet/query.h
@@ -0,0 +1,93 @@
+/*!
+ * \file query.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief API for manipulating queries.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_QUERY_H_
+#define _KNOT_QUERY_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "packet/packet.h"
+#include "dname.h"
+#include "rrset.h"
+#include "edns.h"
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks if DNSSEC was requested in the query (i.e. the DO bit was set).
+ *
+ * \param query Packet where the parsed query is stored.
+ *
+ * \retval 0 if the DO bit was not set in the query, or the query is not yet
+ *         parsed.
+ * \retval > 0 if DO bit was set in the query.
+ */
+int knot_query_dnssec_requested(const knot_packet_t *query);
+
+/*!
+ * \brief Checks if NSID was requested in the query (i.e. the NSID option was
+ *        present in the query OPT RR).
+ *
+ * \param query Packet where the parsed query is stored.
+ *
+ * \retval 0 if the NSID option was not present in the query, or the query is
+ *         not yet parsed.
+ * \retval > 0 if the NSID option was present in the query.
+ */
+int knot_query_nsid_requested(const knot_packet_t *query);
+
+int knot_query_edns_supported(const knot_packet_t *query);
+
+//int knot_query_set_qname(knot_packet_t *query, const knot_dname_t *qname);
+
+//int knot_query_set_qtype(knot_packet_t *query, uint16_t qtype);
+
+//int knot_query_set_qclass(knot_packet_t *query, uint16_t qclass);
+
+int knot_query_init(knot_packet_t *query);
+
+int knot_query_set_question(knot_packet_t *query,
+                              const knot_question_t *question);
+
+int knot_query_set_opcode(knot_packet_t *query, uint8_t opcode);
+
+/*!
+ * \brief Adds a RRSet to the Authority section of the query.
+ *
+ * \param query Query to add the RRSet into.
+ * \param rrset RRSet to be added.
+ *
+ * \retval KNOT_EOK if successful, or the RRSet was already in the query.
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_ESPACE
+ */
+int knot_query_add_rrset_authority(knot_packet_t *query,
+                                   const knot_rrset_t *rrset);
+
+
+#endif /* _KNOT_QUERY_H_ */
+
+/*! @} */
diff --git a/src/libknot/packet/response.c b/src/libknot/packet/response.c
new file mode 100644
index 0000000..e6f89d0
--- /dev/null
+++ b/src/libknot/packet/response.c
@@ -0,0 +1,1170 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+
+#include "packet/response.h"
+#include "util/wire.h"
+#include "util/descriptor.h"
+#include "common.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "packet/packet.h"
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Holds information about compressed domain name.
+ *
+ * Used only to pass information between functions.
+ *
+ * \todo This description should be revised and clarified.
+ */
+struct knot_compr_owner {
+	/*!
+	 * \brief Place where the name is stored in the wire format of the
+	 * packet.
+	 */
+	uint8_t *wire;
+	short size; /*!< Size of the domain name in bytes. */
+	/*! \brief Position of the name relative to the start of the packet. */
+	size_t pos;
+};
+
+typedef struct knot_compr_owner knot_compr_owner_t;
+
+/*!
+ * \brief Holds information about compressed domain names in packet.
+ *
+ * Used only to pass information between functions.
+ *
+ * \todo This description should be revised and clarified.
+ */
+struct knot_compr {
+	knot_compressed_dnames_t *table;  /*!< Compression table. */
+	size_t wire_pos;            /*!< Current position in the wire format. */
+	knot_compr_owner_t owner; /*!< Information about the current name. */
+};
+
+typedef struct knot_compr knot_compr_t;
+
+static const size_t KNOT_RESPONSE_MAX_PTR = 16383;
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Reallocates space for compression table.
+ *
+ * \param table Compression table to reallocate space for.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+static int knot_response_realloc_compr(knot_compressed_dnames_t *table)
+{
+	int free_old = table->max != DEFAULT_DOMAINS_IN_RESPONSE;
+	size_t *old_offsets = table->offsets;
+	const knot_dname_t **old_dnames = table->dnames;
+
+	short new_max_count = table->max + STEP_DOMAINS;
+
+	size_t *new_offsets = (size_t *)malloc(new_max_count * sizeof(size_t));
+	CHECK_ALLOC_LOG(new_offsets, -1);
+
+	const knot_dname_t **new_dnames = (const knot_dname_t **)malloc(
+		new_max_count * sizeof(knot_dname_t *));
+	if (new_dnames == NULL) {
+		ERR_ALLOC_FAILED;
+		free(new_offsets);
+		return KNOT_ENOMEM;
+	}
+
+	memcpy(new_offsets, table->offsets, table->max * sizeof(size_t));
+	memcpy(new_dnames, table->dnames,
+	       table->max * sizeof(knot_dname_t *));
+
+	table->offsets = new_offsets;
+	table->dnames = new_dnames;
+	table->max = new_max_count;
+
+	if (free_old) {
+		free(old_offsets);
+		free(old_dnames);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Stores new mapping between domain name and offset in the compression
+ *        table.
+ *
+ * If the domain name is already present in the table, it is not inserted again.
+ *
+ * \param table Compression table to save the mapping into.
+ * \param dname Domain name to insert.
+ * \param pos Position of the domain name in the packet's wire format.
+ */
+static void knot_response_compr_save(knot_compressed_dnames_t *table,
+                                       const knot_dname_t *dname, size_t pos)
+{
+	assert(table->count < table->max);
+
+	for (int i = 0; i < table->count; ++i) {
+		if (table->dnames[i] == dname) {
+			dbg_response("Already present, skipping..\n");
+			return;
+		}
+	}
+
+	table->dnames[table->count] = dname;
+	table->offsets[table->count] = pos;
+	++table->count;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Stores domain name position and positions of its parent domain names
+ *        to the compression table.
+ *
+ * If part of the domain name (\a dname) was not found previously in the
+ * compression table, this part and all its parent domains is stored also, to
+ * maximize compression potential.
+ *
+ * \param table Compression table to save the information into.
+ * \param dname Domain name to save.
+ * \param not_matched Count of labels not matched when previously searching in
+ *                    the compression table for \a dname.
+ * \param pos Position of the domain name in the wire format of the packet.
+ * \param unmatched_offset Position of the unmatched parent domain of \a dname.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+static int knot_response_store_dname_pos(knot_compressed_dnames_t *table,
+                                           const knot_dname_t *dname,
+                                           int not_matched, size_t pos,
+                                           size_t unmatched_offset,
+                                           int compr_cs)
+{
+dbg_response_exec(
+	char *name = knot_dname_to_str(dname);
+	dbg_response("Putting dname %s into compression table."
+	                      " Labels not matched: %d, position: %zu,"
+	                      ", pointer: %p, unmatched off: %zu\n", name, 
+	                      not_matched, pos, dname, unmatched_offset);
+	free(name);
+);
+	if (pos > KNOT_RESPONSE_MAX_PTR) {
+		dbg_response("Pointer larger than it can be, not"
+		                      " saving\n");
+		return KNOT_EDNAMEPTR;
+	}
+
+	if (table->count == table->max &&
+	    knot_response_realloc_compr(table) != 0) {
+		return KNOT_ENOMEM;
+	}
+
+	// store the position of the name
+//	table->dnames[table->count] = dname;
+//	table->offsets[table->count] = pos;
+//	++table->count;
+
+	/*
+	 * Store positions of ancestors if more than 1 label was not matched.
+	 *
+	 * In case the name is not in the zone, the counting to not_matched
+	 * may be limiting, because the search stopped before after the first
+	 * label (i.e. not_matched == 1). So we do not store the parents in
+	 * this case. However, storing them will require creating those domain
+	 * names, as they do not exist.
+	 *
+	 * The same problem is with domain names synthetized from wildcards.
+	 * These also do not have any node to follow.
+	 *
+	 * We accept this as performance has higher
+	 * priority than the best possible compression.
+	 */
+	const knot_dname_t *to_save = dname;
+	size_t parent_pos = pos;
+	int i = 0;
+
+	while (to_save != NULL && i < knot_dname_label_count(dname)) {
+		if (i == not_matched) {
+			parent_pos = unmatched_offset;
+		}
+
+dbg_response_exec(
+		char *name = knot_dname_to_str(to_save);
+		dbg_response("Putting dname %s into compression table."
+		                      " Position: %zu, pointer: %p\n",
+		                      name, parent_pos, to_save);
+		free(name);
+);
+
+		if (table->count == table->max &&
+		    knot_response_realloc_compr(table) != 0) {
+			dbg_response("Unable to realloc.\n");
+			return KNOT_ENOMEM;
+		}
+
+//		dbg_response("Saving..\n");
+		knot_response_compr_save(table, to_save, parent_pos);
+
+		/*! \todo Remove '!compr_cs'. */
+		// This is a temporary hack to avoid the wrong behaviour
+		// when the wrong not_matched count is used to compare with i
+		// and resulting in using the 0 offset.
+		// If case-sensitive search is in place, we should not save the
+		// node's parent's positions.
+		
+		to_save = !compr_cs && (knot_dname_node(to_save, 1) != NULL
+		      && knot_node_parent(knot_dname_node(to_save, 1), 1)
+		          != NULL) ? knot_node_owner(knot_node_parent(
+		                        knot_dname_node(to_save, 1), 1))
+		                   : NULL;
+
+		dbg_response("i: %d\n", i);
+		parent_pos += knot_dname_label_size(dname, i) + 1;
+//		parent_pos += (i > 0)
+//			      ? knot_dname_label_size(dname, i - 1) + 1 : 0;
+		++i;
+	}
+
+	return KNOT_EOK;
+}
+
+/*---------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to find offset of domain name in the compression table.
+ *
+ * \param table Compression table to search in.
+ * \param dname Domain name to search for.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \return Offset of \a dname stored in the compression table or -1 if the name
+ *         was not found in the table.
+ */
+static size_t knot_response_find_dname_pos(
+               const knot_compressed_dnames_t *table,
+               const knot_dname_t *dname, int compr_cs)
+{
+	for (int i = 0; i < table->count; ++i) {
+//		dbg_response("Comparing dnames %p and %p\n",
+//		                      dname, table->dnames[i]);
+//dbg_response_exec(
+//		char *name = knot_dname_to_str(dname);
+//		dbg_response("(%s and ", name);
+//		name = knot_dname_to_str(table->dnames[i]);
+//		dbg_response("%s)\n", name);
+//		free(name);
+//);
+		//if (table->dnames[i] == dname) {
+		int ret = (compr_cs)
+		           ? knot_dname_compare_cs(table->dnames[i], dname)
+		           : knot_dname_compare(table->dnames[i], dname);
+		if (ret == 0) {
+			dbg_response("Found offset: %zu\n",
+			                      table->offsets[i]);
+			return table->offsets[i];
+		}
+	}
+	return 0;
+}
+
+/*---------------------------------------------------------------------------*/
+/*!
+ * \brief Put a compressed domain name to the wire format of the packet.
+ *
+ * Puts the not matched part of the domain name to the wire format and puts
+ * a pointer to the rest of the name after that.
+ *
+ * \param dname Domain name to put to the wire format.
+ * \param not_matched Size of the part of domain name that cannot be compressed.
+ * \param offset Position of the rest of the domain name in the packet's wire
+ *               format.
+ * \param wire Place where to put the wire format of the name.
+ * \param max Maximum available size of the place for the wire format.
+ *
+ * \return Size of the compressed domain name put into the wire format or
+ *         KNOT_ESPACE if it did not fit.
+ */
+static int knot_response_put_dname_ptr(const knot_dname_t *dname,
+                                         int not_matched, size_t offset,
+                                         uint8_t *wire, size_t max)
+{
+	// put the not matched labels
+	short size = knot_dname_size_part(dname, not_matched);
+	if (size + 2 > max) {
+		return KNOT_ESPACE;
+	}
+
+	memcpy(wire, knot_dname_name(dname), size);
+	knot_wire_put_pointer(wire + size, offset);
+
+	dbg_response("Size of the dname with ptr: %d\n", size + 2);
+	
+	return size + 2;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to compress domain name and creates its wire format.
+ *
+ * \param dname Domain name to convert and compress.
+ * \param compr Compression table holding information about offsets of domain
+ *              names in the packet.
+ * \param dname_wire Place where to put the wire format of the name.
+ * \param max Maximum available size of the place for the wire format.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \return Size of the domain name's wire format or KNOT_ESPACE if it did not
+ *         fit into the provided space.
+ */
+static int knot_response_compress_dname(const knot_dname_t *dname,
+	knot_compr_t *compr, uint8_t *dname_wire, size_t max, int compr_cs)
+{
+	int size = 0;
+	/*!
+	 * \todo Compress!!
+	 *
+	 * if pos == 0, do not store the position!
+	 */
+
+	// try to find the name or one of its ancestors in the compr. table
+#ifdef COMPRESSION_PEDANTIC
+	//knot_dname_t *to_find = knot_dname_copy(dname);
+	knot_dname_t *to_find = (knot_dname_t *)dname;
+	int copied = 0;
+#else
+	const knot_dname_t *to_find = dname;
+#endif
+	size_t offset = 0;
+	int not_matched = 0;
+
+	while (to_find != NULL && knot_dname_label_count(to_find) != 0) {
+dbg_response_exec(
+		char *name = knot_dname_to_str(to_find);
+		dbg_response("Searching for name %s in the compression"
+		                      " table, not matched labels: %d\n", name,
+		                      not_matched);
+		free(name);
+);
+		offset = knot_response_find_dname_pos(compr->table, to_find,
+		                                        compr_cs);
+		if (offset == 0) {
+			++not_matched;
+		} else {
+			break;
+		}
+#ifdef COMPRESSION_PEDANTIC
+		if (compr_cs || to_find->node == NULL
+		    || to_find->node->owner != to_find
+		    || to_find->node->parent == NULL) {
+			if (!copied) {
+				to_find = knot_dname_left_chop(to_find);
+				copied = 1;
+			} else {
+				knot_dname_left_chop_no_copy(to_find);
+			}
+		} else {
+			assert(to_find->node != to_find->node->parent);
+			assert(to_find != to_find->node->parent->owner);
+			to_find = to_find->node->parent->owner;
+		}
+#else
+		// if case-sensitive comparation, we cannot just take the parent
+		if (compr_cs || knot_dname_node(to_find, 1) == NULL
+		    || knot_node_owner(knot_dname_node(to_find, 1)) != to_find
+		    || knot_node_parent(knot_dname_node(to_find, 1), 1)
+		       == NULL) {
+			dbg_response("compr_cs: %d\n", compr_cs);
+			dbg_response("knot_dname_node(to_find, 1) == %p"
+			                    "\n", knot_dname_node(to_find, 1));
+			
+			if (knot_dname_node(to_find, 1) != NULL) {
+				dbg_response("knot_node_owner(knot_dname_node("
+						    "to_find, 1)) = %p, to_find = %p\n",
+					   knot_node_owner(knot_dname_node(to_find, 1)),
+					   to_find);
+				dbg_response("knot_node_parent(knot_dname_node("
+						    "to_find, 1), 1) = %p\n",
+				      knot_node_parent(knot_dname_node(to_find, 1), 1));
+			}
+			break;
+		} else {
+			assert(knot_dname_node(to_find, 1) !=
+			     knot_node_parent(knot_dname_node(to_find, 1), 1));
+			assert(to_find != knot_node_owner(
+			    knot_node_parent(knot_dname_node(to_find, 1), 1)));
+			to_find = knot_node_owner(
+			     knot_node_parent(knot_dname_node(to_find, 1), 1));
+			dbg_response("New to_find: %p\n", to_find);
+		}
+#endif
+	}
+
+#ifdef COMPRESSION_PEDANTIC
+	if (copied) {
+		knot_dname_free(&to_find);
+	}
+#endif
+
+	dbg_response("Max size available for domain name: %zu\n", max);
+	
+	if (offset > 0) {  // found such dname somewhere in the packet
+		dbg_response("Found name in the compression table.\n");
+		assert(offset >= KNOT_WIRE_HEADER_SIZE);
+		size = knot_response_put_dname_ptr(dname, not_matched, offset,
+		                                     dname_wire, max);
+		if (size <= 0) {
+			return KNOT_ESPACE;
+		}
+	} else {
+		dbg_response("Not found, putting whole name.\n");
+		// now just copy the dname without compressing
+		if (dname->size > max) {
+			return KNOT_ESPACE;
+		}
+
+		memcpy(dname_wire, dname->name, dname->size);
+		size = dname->size;
+	}
+
+	// in either way, put info into the compression table
+	/*! \todo This is useless if the name was already in the table. 
+	 *        It is meaningful only if the found name is the one from QNAME
+	 *        and thus its parents are not stored yet.
+	 */
+	assert(compr->wire_pos >= 0);
+	
+	if (knot_response_store_dname_pos(compr->table, dname, not_matched,
+	                                    compr->wire_pos, offset, compr_cs) 
+	    != 0) {
+		dbg_response("Compression info could not be stored."
+		                      "\n");
+	}
+
+	return size;
+}
+
+/*---------------------------------------------------------------------------*/
+/*!
+ * \brief Convert one RR into wire format.
+ *
+ * \param[in] rrset RRSet to which the RR belongs.
+ * \param[in] rdata The actual RDATA of this RR.
+ * \param[in] compr Information about compressed domain names in the packet.
+ * \param[out] rrset_wire Place to put the wire format of the RR into.
+ * \param[in] max_size Size of space available for the wire format.
+ * \param[in] compr_cs Set to <> 0 if dname compression should use case
+ *                     sensitive comparation. Set to 0 otherwise.
+ *
+ * \return Size of the RR's wire format or KNOT_ESPACE if it did not fit into
+ *         the provided space.
+ */
+static int knot_response_rr_to_wire(const knot_rrset_t *rrset,
+                                      const knot_rdata_t *rdata,
+                                      knot_compr_t *compr,
+                                      uint8_t **rrset_wire, size_t max_size,
+                                      int compr_cs)
+{
+	int size = 0;
+	
+	dbg_response("Max size: %zu, owner pos: %zu, owner size: %d\n",
+	                    max_size, compr->owner.pos, compr->owner.size);
+
+	if (size + ((compr->owner.pos == 0
+	             || compr->owner.pos > KNOT_RESPONSE_MAX_PTR) 
+		? compr->owner.size : 2) + 10
+	    > max_size) {
+		return KNOT_ESPACE;
+	}
+
+	dbg_response("Owner position: %zu\n", compr->owner.pos);
+
+	// put owner if needed (already compressed)
+	if (compr->owner.pos == 0 || compr->owner.pos > KNOT_RESPONSE_MAX_PTR) {
+		memcpy(*rrset_wire, compr->owner.wire, compr->owner.size);
+		compr->owner.pos = compr->wire_pos;
+		*rrset_wire += compr->owner.size;
+		size += compr->owner.size;
+	} else {
+		dbg_response("Putting pointer: %zu\n",
+		                      compr->owner.pos);
+		knot_wire_put_pointer(*rrset_wire, compr->owner.pos);
+		*rrset_wire += 2;
+		size += 2;
+	}
+	
+	dbg_response("Max size: %zu, size: %d\n", max_size, size);
+
+	dbg_response("Wire format:\n");
+
+	// put rest of RR 'header'
+	knot_wire_write_u16(*rrset_wire, rrset->type);
+	dbg_response("  Type: %u\n", rrset->type);
+	dbg_response("  Type in wire: ");
+	dbg_response_hex((char *)*rrset_wire, 2);
+	*rrset_wire += 2;
+
+	knot_wire_write_u16(*rrset_wire, rrset->rclass);
+	dbg_response("  Class: %u\n", rrset->rclass);
+	dbg_response("  Class in wire: ");
+	dbg_response_hex((char *)*rrset_wire, 2);
+	*rrset_wire += 2;
+
+	knot_wire_write_u32(*rrset_wire, rrset->ttl);
+	dbg_response("  TTL: %u\n", rrset->ttl);
+	dbg_response("  TTL in wire: ");
+	dbg_response_hex((char *)*rrset_wire, 4);
+	*rrset_wire += 4;
+
+	// save space for RDLENGTH
+	uint8_t *rdlength_pos = *rrset_wire;
+	*rrset_wire += 2;
+
+	size += 10;
+	compr->wire_pos += size;
+	
+	dbg_response("Max size: %zu, size: %d\n", max_size, size);
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(rrset->type);
+
+	uint16_t rdlength = 0;
+
+	for (int i = 0; i < rdata->count; ++i) {
+		if (max_size < size + rdlength) {
+			return KNOT_ESPACE;
+		}
+		
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME: {
+			int ret = knot_response_compress_dname(
+				knot_rdata_item(rdata, i)->dname,
+				compr, *rrset_wire, max_size - size - rdlength, 
+				compr_cs);
+
+			if (ret < 0) {
+				return KNOT_ESPACE;
+			}
+
+			dbg_response("Compressed dname size: %d\n",
+			                      ret);
+			*rrset_wire += ret;
+			rdlength += ret;
+			compr->wire_pos += ret;
+			// TODO: compress domain name
+			break;
+		}
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME: {
+			knot_dname_t *dname =
+				knot_rdata_item(rdata, i)->dname;
+			if (size + rdlength + dname->size > max_size) {
+				return KNOT_ESPACE;
+			}
+
+			// save whole domain name
+			memcpy(*rrset_wire, dname->name, dname->size);
+			dbg_response("Uncompressed dname size: %d\n",
+			                      dname->size);
+			*rrset_wire += dname->size;
+			rdlength += dname->size;
+			compr->wire_pos += dname->size;
+			break;
+		}
+//		case KNOT_RDATA_WF_BINARYWITHLENGTH: {
+//			uint16_t *raw_data =
+//				knot_rdata_item(rdata, i)->raw_data;
+
+//			if (size + raw_data[0] + 1 > max_size) {
+//				return KNOT_ESPACE;
+//			}
+
+//			// copy also the rdata item size
+//			assert(raw_data[0] < 256);
+//			**rrset_wire = raw_data[0];
+//			*rrset_wire += 1;
+//			memcpy(*rrset_wire, raw_data + 1, raw_data[0]);
+//			dbg_response("Raw data size: %d\n",
+//			                      raw_data[0] + 1);
+//			*rrset_wire += raw_data[0];
+//			rdlength += raw_data[0] + 1;
+//			compr->wire_pos += raw_data[0] + 1;
+//			break;
+//		}
+		default: {
+			uint16_t *raw_data =
+				knot_rdata_item(rdata, i)->raw_data;
+
+			if (size + rdlength + raw_data[0] > max_size) {
+				return KNOT_ESPACE;
+			}
+
+			// copy just the rdata item data (without size)
+			memcpy(*rrset_wire, raw_data + 1, raw_data[0]);
+			dbg_response("Raw data size: %d\n",
+			                      raw_data[0]);
+			*rrset_wire += raw_data[0];
+			rdlength += raw_data[0];
+			compr->wire_pos += raw_data[0];
+			break;
+		}
+		}
+	}
+	
+	dbg_response("Max size: %zu, size: %d\n", max_size, size);
+
+	assert(size + rdlength <= max_size);
+	size += rdlength;
+	knot_wire_write_u16(rdlength_pos, rdlength);
+
+	return size;
+}
+
+/*---------------------------------------------------------------------------*/
+/*!
+ * \brief Convert whole RRSet into wire format.
+ *
+ * \param[in] rrset RRSet to convert
+ * \param[out] pos Place where to put the wire format.
+ * \param[out] size Size of the converted wire format.
+ * \param[in] max_size Maximum available space for the wire format.
+ * \param wire_pos Current position in the wire format of the whole packet.
+ * \param owner_tmp Wire format of the RRSet's owner, possibly compressed.
+ * \param compr Information about compressed domain names in the packet.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \return Size of the RRSet's wire format or KNOT_ESPACE if it did not fit
+ *         into the provided space.
+ */
+static int knot_response_rrset_to_wire(const knot_rrset_t *rrset,
+                                         uint8_t **pos, size_t *size,
+                                         size_t max_size, size_t wire_pos,
+                                         uint8_t *owner_tmp,
+                                         knot_compressed_dnames_t *compr,
+                                         int compr_cs)
+{
+dbg_response_exec(
+	char *name = knot_dname_to_str(rrset->owner);
+	dbg_response("Converting RRSet with owner %s, type %s\n",
+	                      name, knot_rrtype_to_string(rrset->type));
+	free(name);
+	dbg_response("  Size before: %zu\n", *size);
+);
+
+	// if no RDATA in RRSet, return
+	if (rrset->rdata == NULL) {
+		return KNOT_EOK;
+	}
+
+	//uint8_t *rrset_wire = (uint8_t *)malloc(PREALLOC_RRSET_WIRE);
+	//short rrset_size = 0;
+
+	//uint8_t *owner_wire = (uint8_t *)malloc(rrset->owner->size);
+	/*
+	 * We may pass the current position to the compression function
+	 * because if the owner will be put somewhere, it will be on the
+	 * current position (first item of a RR). If it will not be put into
+	 * the wireformat, we may remove the dname (and possibly its parents)
+	 * from the compression table.
+	 */
+
+	knot_compr_t compr_info;
+	//compr_info.new_entries = 0;
+	compr_info.table = compr;
+	compr_info.wire_pos = wire_pos;
+	compr_info.owner.pos = 0;
+	compr_info.owner.wire = owner_tmp;
+	compr_info.owner.size =
+		knot_response_compress_dname(rrset->owner, &compr_info,
+		                               owner_tmp, max_size, compr_cs);
+
+	dbg_response("    Owner size: %d, position: %zu\n",
+	                      compr_info.owner.size, compr_info.owner.pos);
+	if (compr_info.owner.size < 0) {
+		return KNOT_ESPACE;
+	}
+
+	int rrs = 0;
+	short rrset_size = 0;
+
+	const knot_rdata_t *rdata = rrset->rdata;
+	do {
+		int ret = knot_response_rr_to_wire(rrset, rdata, &compr_info,
+		                                     pos, max_size - rrset_size,
+		                                     compr_cs);
+
+		assert(ret != 0);
+
+		if (ret < 0) {
+			// some RR didn't fit in, so no RRs should be used
+			// TODO: remove last entries from compression table
+			dbg_response("Some RR didn't fit in.\n");
+			return KNOT_ESPACE;
+		}
+
+		dbg_response("RR of size %d added.\n", ret);
+		rrset_size += ret;
+		++rrs;
+	} while ((rdata = knot_rrset_rdata_next(rrset, rdata)) != NULL);
+
+	//memcpy(*pos, rrset_wire, rrset_size);
+	//*size += rrset_size;
+	//*pos += rrset_size;
+
+	// the whole RRSet did fit in
+	assert (rrset_size <= max_size);
+	*size += rrset_size;
+
+	dbg_response("  Size after: %zu\n", *size);
+
+	return rrs;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to add RRSet to the response.
+ *
+ * This function tries to convert the RRSet to wire format and add it to the
+ * wire format of the response and if successful, adds the RRSet to the given
+ * list (and updates its size). If the RRSet did not fit into the available
+ * space (\a max_size), it is omitted as a whole and the TC bit may be set
+ * (according to \a tc).
+ *
+ * \param rrsets Lists of RRSets to which this RRSet should be added.
+ * \param rrset_count Number of RRSets in the list.
+ * \param resp Response structure where the RRSet should be added.
+ * \param max_size Maximum available space in wire format of the response.
+ * \param rrset RRSet to add.
+ * \param tc Set to <> 0 if omitting the RRSet should cause the TC bit to be
+ *           set in the response.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \return Count of RRs added to the response or KNOT_ESPACE if the RRSet did
+ *         not fit in the available space.
+ */
+static int knot_response_try_add_rrset(const knot_rrset_t **rrsets,
+                                        short *rrset_count,
+                                        knot_packet_t *resp,
+                                        size_t max_size,
+                                        const knot_rrset_t *rrset, int tc,
+                                        int compr_cs)
+{
+	//short size = knot_response_rrset_size(rrset, &resp->compression);
+
+dbg_response_exec(
+	char *name = knot_dname_to_str(rrset->owner);
+	dbg_response("\nAdding RRSet with owner %s and type %s: \n",
+	                      name, knot_rrtype_to_string(rrset->type));
+	free(name);
+);
+
+	uint8_t *pos = resp->wireformat + resp->size;
+	size_t size = 0;
+	int rrs = knot_response_rrset_to_wire(rrset, &pos, &size, max_size,
+	                                        resp->size, resp->owner_tmp,
+	                                        &resp->compression, compr_cs);
+
+	if (rrs >= 0) {
+		rrsets[(*rrset_count)++] = rrset;
+		resp->size += size;
+		dbg_response("RRset added, size: %zu, RRs: %d, total "
+		                      "size of response: %zu\n\n", size, rrs,
+		                      resp->size);
+	} else if (tc) {
+		dbg_response("Setting TC bit.\n");
+		knot_wire_flags_set_tc(&resp->header.flags1);
+		knot_wire_set_tc(resp->wireformat);
+	}
+
+	return rrs;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Reallocate space for RRSets.
+ *
+ * \param rrsets Space for RRSets.
+ * \param max_count Size of the space available for the RRSets.
+ * \param default_max_count Size of the space pre-allocated for the RRSets when
+ *        the response structure was initialized.
+ * \param step How much the space should be increased.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+static int knot_response_realloc_rrsets(const knot_rrset_t ***rrsets,
+                                          short *max_count,
+                                          short default_max_count, short step)
+{
+	int free_old = (*max_count) != default_max_count;
+	const knot_rrset_t **old = *rrsets;
+
+	short new_max_count = *max_count + step;
+	const knot_rrset_t **new_rrsets = (const knot_rrset_t **)malloc(
+		new_max_count * sizeof(knot_rrset_t *));
+	CHECK_ALLOC_LOG(new_rrsets, KNOT_ENOMEM);
+
+	memcpy(new_rrsets, *rrsets, (*max_count) * sizeof(knot_rrset_t *));
+
+	*rrsets = new_rrsets;
+	*max_count = new_max_count;
+
+	if (free_old) {
+		free(old);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int knot_response_init(knot_packet_t *response)
+{
+	if (response == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (response->max_size < KNOT_WIRE_HEADER_SIZE) {
+		return KNOT_ESPACE;
+	}
+
+	// set the qr bit to 1
+	knot_wire_flags_set_qr(&response->header.flags1);
+
+	uint8_t *pos = response->wireformat;
+	knot_packet_header_to_wire(&response->header, &pos,
+	                                &response->size);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_init_from_query(knot_packet_t *response,
+                                    knot_packet_t *query)
+{
+
+	if (response == NULL || query == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// copy the header from the query
+	memcpy(&response->header, &query->header, sizeof(knot_header_t));
+//	memmove(&response->header, &query->header, sizeof(knot_header_t));
+
+	// copy the Question section (but do not copy the QNAME)
+	memcpy(&response->question, &query->question,
+	       sizeof(knot_question_t));
+//	memmove(&response->question, &query->question,
+//	        sizeof(knot_question_t));
+
+	int err = 0;
+	// put the qname into the compression table
+	// TODO: get rid of the numeric constants
+	if ((err = knot_response_store_dname_pos(&response->compression,
+	              response->question.qname, 0, 12, 12, 0)) != KNOT_EOK) {
+		return err;
+	}
+
+	// copy the wireformat of Header and Question from the query
+	// TODO: get rid of the numeric constants
+	size_t to_copy = 12 + 4 + knot_dname_size(response->question.qname);
+
+	assert(response->max_size >= to_copy);
+//	printf("Resp init from query: Copying from: %p to: %p size: %d\n",
+//	       response->wireformat, query->wireformat,
+//	       to_copy);
+//	printf("Resp init from query: Question name size: %d Query name size: %d\n",
+//	       knot_dname_size(response->question.qname),
+//	       knot_dname_size(query->question.qname));
+	memcpy(response->wireformat, query->wireformat, to_copy);
+	response->size = to_copy;
+
+	// set the qr bit to 1
+	knot_wire_flags_set_qr(&response->header.flags1);
+	knot_wire_set_qr(response->wireformat);
+	
+	// clear AD flag
+	knot_wire_flags_clear_ad(&response->header.flags2);
+	knot_wire_clear_ad(response->wireformat);
+	
+	// clear RA flag
+	knot_wire_flags_clear_ra(&response->header.flags2);
+	knot_wire_clear_ad(response->wireformat);
+
+	// set counts to 0
+	response->header.ancount = 0;
+	response->header.nscount = 0;
+	response->header.arcount = 0;
+
+	response->query = query;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_response_clear(knot_packet_t *resp, int clear_question)
+{
+	if (resp == NULL) {
+		return;
+	}
+
+	resp->size = (clear_question) ? KNOT_WIRE_HEADER_SIZE
+	              : KNOT_WIRE_HEADER_SIZE + 4
+	                + knot_dname_size(resp->question.qname);
+	resp->an_rrsets = 0;
+	resp->ns_rrsets = 0;
+	resp->ar_rrsets = 0;
+	resp->compression.count = 0;
+	knot_packet_free_tmp_rrsets(resp);
+	resp->tmp_rrsets_count = 0;
+	resp->header.ancount = 0;
+	resp->header.nscount = 0;
+	resp->header.arcount = 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_add_opt(knot_packet_t *resp,
+                            const knot_opt_rr_t *opt_rr,
+                            int override_max_size)
+{
+	if (resp == NULL || opt_rr == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// copy the OPT RR
+	resp->opt_rr.version = opt_rr->version;
+	resp->opt_rr.ext_rcode = opt_rr->ext_rcode;
+	resp->opt_rr.payload = opt_rr->payload;
+	resp->opt_rr.size = opt_rr->size;
+
+	// if max size is set, it means there is some reason to be that way,
+	// so we can't just set it to higher value
+
+	if (override_max_size && resp->max_size > 0
+	    && resp->max_size < opt_rr->payload) {
+		return KNOT_EPAYLOAD;
+	}
+
+	// set max size (less is OK)
+	if (override_max_size) {
+		dbg_response("Overriding max size to: %u\n",
+		                    resp->opt_rr.payload);
+		return knot_packet_set_max_size(resp, resp->opt_rr.payload);
+		//resp->max_size = resp->opt_rr.payload;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_add_rrset_answer(knot_packet_t *response,
+                                     const knot_rrset_t *rrset, int tc,
+                                     int check_duplicates, int compr_cs)
+{
+	if (response == NULL || rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	dbg_response("add_rrset_answer()\n");
+	assert(response->header.arcount == 0);
+	assert(response->header.nscount == 0);
+
+	if (response->an_rrsets == response->max_an_rrsets
+	    && knot_response_realloc_rrsets(&response->answer,
+	          &response->max_an_rrsets, DEFAULT_ANCOUNT, STEP_ANCOUNT)
+	       != KNOT_EOK) {
+		return KNOT_ENOMEM;
+	}
+
+	if (check_duplicates && knot_packet_contains(response, rrset,
+	                                            KNOT_RRSET_COMPARE_PTR)) {
+		return KNOT_EOK;
+	}
+
+	dbg_response("Trying to add RRSet to Answer section.\n");
+	dbg_response("RRset: %p\n", rrset);
+	dbg_response("Owner: %p\n", rrset->owner);
+
+	int rrs = knot_response_try_add_rrset(response->answer,
+	                                        &response->an_rrsets, response,
+	                                        response->max_size
+	                                        - response->size
+	                                        - response->opt_rr.size
+	                                        - response->tsig_size,
+	                                        rrset, tc, compr_cs);
+
+	if (rrs >= 0) {
+		response->header.ancount += rrs;
+		return KNOT_EOK;
+	}
+
+	return KNOT_ESPACE;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_add_rrset_authority(knot_packet_t *response,
+                                        const knot_rrset_t *rrset, int tc,
+                                        int check_duplicates, int compr_cs)
+{
+	if (response == NULL || rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	assert(response->header.arcount == 0);
+
+	if (response->ns_rrsets == response->max_ns_rrsets
+	    && knot_response_realloc_rrsets(&response->authority,
+			&response->max_ns_rrsets, DEFAULT_NSCOUNT, STEP_NSCOUNT)
+		!= 0) {
+		return KNOT_ENOMEM;
+	}
+
+	if (check_duplicates && knot_packet_contains(response, rrset,
+	                                           KNOT_RRSET_COMPARE_PTR)) {
+		return KNOT_EOK;
+	}
+
+	dbg_response("Trying to add RRSet to Authority section.\n");
+
+	int rrs = knot_response_try_add_rrset(response->authority,
+	                                        &response->ns_rrsets, response,
+	                                        response->max_size
+	                                        - response->size
+	                                        - response->opt_rr.size
+	                                        - response->tsig_size,
+	                                        rrset, tc, compr_cs);
+
+	if (rrs >= 0) {
+		response->header.nscount += rrs;
+		return KNOT_EOK;
+	}
+
+	return KNOT_ESPACE;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_add_rrset_additional(knot_packet_t *response,
+                                         const knot_rrset_t *rrset, int tc,
+                                         int check_duplicates, int compr_cs)
+{
+	if (response == NULL || rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int ret;
+
+	// if this is the first additional RRSet, add EDNS OPT RR first
+	if (response->header.arcount == 0
+	    && response->opt_rr.version != EDNS_NOT_SUPPORTED
+	    && (ret = knot_packet_edns_to_wire(response)) != KNOT_EOK) {
+		return ret;
+	}
+
+	if (response->ar_rrsets == response->max_ar_rrsets
+	    && knot_response_realloc_rrsets(&response->additional,
+			&response->max_ar_rrsets, DEFAULT_ARCOUNT, STEP_ARCOUNT)
+		!= 0) {
+		return KNOT_ENOMEM;
+	}
+
+	if (check_duplicates && knot_packet_contains(response, rrset,
+	                                            KNOT_RRSET_COMPARE_PTR)) {
+		return KNOT_EOK;
+	}
+
+	dbg_response("Trying to add RRSet to Additional section.\n");
+
+	int rrs = knot_response_try_add_rrset(response->additional,
+	                                        &response->ar_rrsets, response,
+	                                        response->max_size
+	                                        - response->size
+	                                        - response->tsig_size, rrset, 
+	                                        tc, compr_cs);
+
+	if (rrs >= 0) {
+		response->header.arcount += rrs;
+		return KNOT_EOK;
+	}
+
+	return KNOT_ESPACE;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_response_set_rcode(knot_packet_t *response, short rcode)
+{
+	if (response == NULL) {
+		return;
+	}
+
+	knot_wire_flags_set_rcode(&response->header.flags2, rcode);
+	knot_wire_set_rcode(response->wireformat, rcode);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_response_set_aa(knot_packet_t *response)
+{
+	if (response == NULL) {
+		return;
+	}
+
+	knot_wire_flags_set_aa(&response->header.flags1);
+	knot_wire_set_aa(response->wireformat);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_response_set_tc(knot_packet_t *response)
+{
+	if (response == NULL) {
+		return;
+	}
+
+	knot_wire_flags_set_tc(&response->header.flags1);
+	knot_wire_set_tc(response->wireformat);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_response_add_nsid(knot_packet_t *response, const uint8_t *data,
+                             uint16_t length)
+{
+	if (response == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return knot_edns_add_option(&response->opt_rr,
+	                              EDNS_OPTION_NSID, length, data);
+}
diff --git a/src/libknot/packet/response.h b/src/libknot/packet/response.h
new file mode 100644
index 0000000..38bd9a8
--- /dev/null
+++ b/src/libknot/packet/response.h
@@ -0,0 +1,198 @@
+/*!
+ * \file response.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief API for response manipulation.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_response_H_
+#define _KNOT_response_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "packet/packet.h"
+
+#include "dname.h"
+#include "rrset.h"
+#include "edns.h"
+
+/*!
+ * \brief Default maximum DNS response size
+ *
+ * This size must be supported by all servers and clients.
+ */
+static const short KNOT_MAX_RESPONSE_SIZE = 512;
+
+/*----------------------------------------------------------------------------*/
+int knot_response_init(knot_packet_t *response);
+
+/*!
+ * \brief Initializes response from the given query.
+ *
+ * Copies the header, Changes QR bit to 1, copies the Question section and
+ * stores pointer to the query packet structure in the response packet
+ * structure.
+ *
+ * \warning Never free the query packet structure after calling this function,
+ *          it will be freed when the response structure is freed.
+ *
+ * \param response Packet structure representing the response.
+ * \param query Packet structure representing the query.
+ *
+ * \retval KNOT_EOK
+ */
+int knot_response_init_from_query(knot_packet_t *response,
+                                    knot_packet_t *query);
+
+/*!
+ * \brief Clears the response structure for reuse.
+ *
+ * After call to this function, the response will be in the same state as if
+ * knot_response_new() was called. The maximum wire size is retained.
+ *
+ * \param response Response structure to clear.
+ *
+ * \todo Replace the use of this function with something else maybe?
+ */
+void knot_response_clear(knot_packet_t *resp, int clear_question);
+
+/*!
+ * \brief Sets the OPT RR of the response.
+ *
+ * This function also allocates space for the wireformat of the response, if
+ * the payload in the OPT RR is larger than the current maximum size of the
+ * response and copies the current wireformat over to the new space.
+ *
+ * \note The contents of the OPT RR are copied.
+ *
+ * \param resp Response to set the OPT RR to.
+ * \param opt_rr OPT RR to set.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ *
+ * \todo Needs test.
+ */
+int knot_response_add_opt(knot_packet_t *resp,
+                            const knot_opt_rr_t *opt_rr,
+                            int override_max_size);
+
+/*!
+ * \brief Adds a RRSet to the Answer section of the response.
+ *
+ * \param response Response to add the RRSet into.
+ * \param rrset RRSet to be added.
+ * \param tc Set to <> 0 if omitting this RRSet should result in the TC bit set.
+ *           Otherwise set to 0.
+ * \param check_duplicates Set to <> 0 if the RRSet should not be added to the
+ *                         response in case it is already there.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \retval KNOT_EOK if successful, or the RRSet was already in the answer.
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_ESPACE
+ */
+int knot_response_add_rrset_answer(knot_packet_t *response,
+                                     const knot_rrset_t *rrset, int tc,
+                                     int check_duplicates, int compr_cs);
+
+/*!
+ * \brief Adds a RRSet to the Authority section of the response.
+ *
+ * \param response Response to add the RRSet into.
+ * \param rrset RRSet to be added.
+ * \param tc Set to <> 0 if omitting this RRSet should result in the TC bit set.
+ *           Otherwise set to 0.
+ * \param check_duplicates Set to <> 0 if the RRSet should not be added to the
+ *                         response in case it is already there.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \retval KNOT_EOK if successful, or the RRSet was already in the answer.
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_ESPACE
+ */
+int knot_response_add_rrset_authority(knot_packet_t *response,
+                                        const knot_rrset_t *rrset, int tc,
+                                        int check_duplicates, int compr_cs);
+
+/*!
+ * \brief Adds a RRSet to the Additional section of the response.
+ *
+ * \param response Response to add the RRSet into.
+ * \param rrset RRSet to be added.
+ * \param tc Set to <> 0 if omitting this RRSet should result in the TC bit set.
+ *           Otherwise set to 0.
+ * \param check_duplicates Set to <> 0 if the RRSet should not be added to the
+ *                         response in case it is already there.
+ * \param compr_cs Set to <> 0 if dname compression should use case sensitive
+ *                 comparation. Set to 0 otherwise.
+ *
+ * \retval KNOT_EOK if successful, or the RRSet was already in the answer.
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_ESPACE
+ */
+int knot_response_add_rrset_additional(knot_packet_t *response,
+                                         const knot_rrset_t *rrset, int tc,
+                                         int check_duplicates, int compr_cs);
+
+/*!
+ * \brief Sets the RCODE of the response.
+ *
+ * \param response Response to set the RCODE in.
+ * \param rcode RCODE to set.
+ */
+void knot_response_set_rcode(knot_packet_t *response, short rcode);
+
+/*!
+ * \brief Sets the AA bit of the response to 1.
+ *
+ * \param response Response in which the AA bit should be set.
+ */
+void knot_response_set_aa(knot_packet_t *response);
+
+/*!
+ * \brief Sets the TC bit of the response to 1.
+ *
+ * \param response Response in which the TC bit should be set.
+ */
+void knot_response_set_tc(knot_packet_t *response);
+
+/*!
+ * \brief Adds NSID option to the response.
+ *
+ * \param response Response to add the NSID option into.
+ * \param data NSID data.
+ * \param length Size of NSID data in bytes.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+int knot_response_add_nsid(knot_packet_t *response, const uint8_t *data,
+                             uint16_t length);
+
+#endif /* _KNOT_response_H_ */
+
+/*! @} */
diff --git a/src/libknot/rdata.c b/src/libknot/rdata.c
new file mode 100644
index 0000000..0c51f5b
--- /dev/null
+++ b/src/libknot/rdata.c
@@ -0,0 +1,838 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "common.h"
+#include "rdata.h"
+#include "util/descriptor.h"
+#include "dname.h"
+#include "util/error.h"
+#include "zone/node.h"
+#include "util/utils.h"
+#include "util/debug.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Compares two RDATA items as binary data.
+ *
+ * \param d1 First item.
+ * \param d2 Second item.
+ * \param count1 Size of the first item in bytes. If set to < 0, the size will
+ *               be taken from the first two bytes of \a d1.
+ * \param count2 Size of the second item in bytes. If set to < 0, the size will
+ *               be taken from the first two bytes of \a d2.
+ *
+ * \retval 0 if the items are identical.
+ * \retval < 0 if \a d1 goes before \a d2 in canonical order.
+ * \retval > 0 if \a d1 goes after \a d2 in canonical order.
+ */
+static int knot_rdata_compare_binary(const uint8_t *d1, const uint8_t *d2,
+				       int count1, int count2)
+{
+	int i1 = 0, i2 = 0;
+
+	// length stored in the first octet
+	if (count1 < 0) {
+		// take count from the first two bytes
+		count1 = (int)(*(uint16_t *)d1);
+		// and start from the third byte
+		i1 = 2;
+	}
+	if (count2 < 0) {  // dtto
+		count2 = (int)(*(uint16_t *)d2);
+		i2 = 2;
+	}
+
+
+	while (i1 < count1 && i2 < count2 && d1[i1] == d2[i2]) {
+		++i1;
+		++i2;
+	}
+
+	if (i1 == count1 && i2 == count2) {
+		return 0;
+	}
+
+	if (i1 == count1 && i2 < count2) {
+		return -1;
+	} else if (i2 == count2 && i1 < count1) {
+		return 1;
+	} else {
+		assert(i1 < count1 && i2 < count2);
+		return (d1[i1] < d2[i2]) ? -1 : 1;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Retrieves the domain name from MX RDATA.
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the second
+ *       RDATA item, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the MX domain name from.
+ *
+ * \return MX domain name stored in \a rdata or NULL if \a rdata has less than 2
+ *         items.
+ */
+static const knot_dname_t *knot_rdata_mx_name(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 2) {
+		return NULL;
+	}
+	return rdata->items[1].dname;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Retrieves the domain name from NS RDATA.
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the first
+ *       RDATA item, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the NS domain name from.
+ *
+ * \return NS domain name stored in \a rdata or NULL if \a rdata has no items.
+ */
+static const knot_dname_t *knot_rdata_ns_name(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 1) {
+		return NULL;
+	}
+	return rdata->items[0].dname;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Retrieves the domain name from SRV RDATA.
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the fourth
+ *       RDATA item, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the SRV domain name from.
+ *
+ * \return SRV domain name stored in \a rdata or NULL if \a rdata has less than
+ *         4 items.
+ */
+static const knot_dname_t *knot_rdata_srv_name(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 4) {
+		return NULL;
+	}
+	return rdata->items[3].dname;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_t *knot_rdata_new()
+{
+	knot_rdata_t *rdata =
+		(knot_rdata_t *)malloc(sizeof(knot_rdata_t));
+	if (rdata == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	rdata->items = NULL;
+	rdata->count = 0;
+	rdata->next = NULL;
+
+	return rdata;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_from_wire(knot_rdata_t *rdata, const uint8_t *wire,
+                           size_t *pos, size_t total_size, size_t rdlength,
+                           const knot_rrtype_descriptor_t *desc)
+{
+	int i = 0;
+	uint8_t item_type;
+	size_t parsed = 0;
+
+	if (rdlength == 0) {
+		rdata->items = NULL;
+		return KNOT_EOK;
+	}
+
+	knot_rdata_item_t *items = (knot_rdata_item_t *)malloc(
+	                            desc->length * sizeof(knot_rdata_item_t));
+	CHECK_ALLOC_LOG(items, KNOT_ENOMEM);
+
+	size_t item_size = 0;
+	uint8_t gateway_type = 0;  // only to handle IPSECKEY record
+	knot_dname_t *dname = NULL;
+
+	while (i < desc->length && (desc->fixed_items || parsed < rdlength)) {
+		
+		item_type = desc->wireformat[i];
+		item_size = 0;
+
+		size_t pos2;
+
+		switch (item_type) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			pos2 = *pos;
+			dname = knot_dname_parse_from_wire(
+				wire, &pos2, total_size, NULL);
+			if (dname == NULL) {
+				free(items);
+				return KNOT_ERROR;
+			}
+			items[i].dname = dname;
+			//*pos += dname->size;
+			parsed += pos2 - *pos;
+			*pos = pos2;
+			dname = 0;
+			break;
+		case KNOT_RDATA_WF_BYTE:
+			if (desc->type == KNOT_RRTYPE_IPSECKEY && i == 1) {
+				gateway_type = *(wire + *pos);
+			}
+			item_size = 1;
+			break;
+		case KNOT_RDATA_WF_SHORT:
+			item_size = 2;
+			break;
+		case KNOT_RDATA_WF_LONG:
+			item_size = 4;
+			break;
+		case KNOT_RDATA_WF_UINT48:
+			item_size = 6;
+			break;
+		case KNOT_RDATA_WF_TEXT:
+			item_size = rdlength - parsed;
+			break;
+		case KNOT_RDATA_WF_TEXT_SINGLE:
+			item_size = *(wire + *pos) + 1;
+			break;
+		case KNOT_RDATA_WF_A:
+			item_size = 4;
+			break;
+		case KNOT_RDATA_WF_AAAA:
+			item_size = 16;
+			break;
+		case KNOT_RDATA_WF_BINARY:
+			item_size = rdlength - parsed;
+			break;
+		case KNOT_RDATA_WF_BINARYWITHLENGTH:
+			item_size = *(wire + *pos) + 1;
+			break;
+		case KNOT_RDATA_WF_BINARYWITHSHORT:
+			item_size = knot_wire_read_u16(wire + *pos) + 2;
+			break;
+		case KNOT_RDATA_WF_APL:
+			// WTF? what to do with this??
+			// Same as TXT, I guess.
+			item_size = rdlength - parsed;
+			break;
+		case KNOT_RDATA_WF_IPSECGATEWAY:
+			// determine size based on the 'gateway type' field
+			switch (gateway_type) {
+			case 0:
+				item_size = 0;
+				break;
+			case 1:
+				item_size = 4;
+				break;
+			case 2:
+				item_size = 16;
+				break;
+			case 3:
+				pos2 = *pos;
+				fprintf(stderr, "reading dname from pos: %zu\n", pos2);
+				dname =
+					knot_dname_parse_from_wire(
+					         wire, &pos2, total_size, NULL);
+				if (dname == NULL) {
+					return KNOT_ERROR;
+				}
+				items[i].dname = dname;
+				//*pos += dname->size;
+				parsed += pos2 - *pos;
+				
+				fprintf(stderr, "read %zu bytes.\n", parsed);
+				*pos = pos2;
+				dname = 0;
+				break;
+			default:
+				assert(0);
+			}
+
+			break;
+		default:
+			return KNOT_EMALF;
+
+		}
+
+		if (item_size != 0) {
+			if (parsed + item_size > rdlength) {
+				free(items);
+				return KNOT_EFEWDATA;
+			}
+
+			items[i].raw_data = (uint16_t *)malloc(item_size + 2);
+			if (items[i].raw_data == NULL) {
+				free(items);
+				return KNOT_ENOMEM;
+			}
+			memcpy(items[i].raw_data, &item_size, 2);
+			memcpy(items[i].raw_data + 1, wire + *pos, item_size);
+			*pos += item_size;
+			parsed += item_size;
+		} else if (item_type == KNOT_RDATA_WF_BINARY
+		           || item_type == KNOT_RDATA_WF_IPSECGATEWAY) {
+			fprintf(stderr, "item_size was 0, creating empty rdata item.\n");
+			// in this case we are at the end of the RDATA
+			// and should create an empty RDATA item
+			items[i].raw_data = (uint16_t *)malloc(2);
+			if (items[i].raw_data == NULL) {
+				free(items);
+				return KNOT_ENOMEM;
+			}
+			memcpy(items[i].raw_data, &item_size, 2);
+		} else if (item_type != KNOT_RDATA_WF_COMPRESSED_DNAME
+		           && item_type != KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+		           && item_type != KNOT_RDATA_WF_LITERAL_DNAME) {
+				fprintf(stderr, "RDATA item not set (i: %d), type: %u"
+					" RDATA item type: %d\n", i, desc->type ,item_type);
+				assert(0);
+		}
+
+		++i;
+	}
+
+	assert(!desc->fixed_items || i == desc->length);
+
+	// all items are parsed, insert into the RDATA
+	int rc;
+	rc = knot_rdata_set_items(rdata, items, i);
+	
+	for (int j = 0; j < i; ++j) {
+		assert(rdata->items[j].raw_data != NULL);
+	}
+	
+	free(items);
+	return rc;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_set_item(knot_rdata_t *rdata, uint pos,
+			  knot_rdata_item_t item)
+{
+	if (pos >= rdata->count) {
+		return KNOT_EBADARG;
+	}
+
+	/*! \todo As in set_items() we should increment refcounter for dnames,
+	 *        but we don't know the item type.
+	 */
+
+	rdata->items[pos] = item; // this should copy the union; or use memcpy?
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+unsigned int knot_rdata_item_count(const knot_rdata_t *rdata)
+{
+	return rdata->count;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_set_items(knot_rdata_t *rdata,
+			   const knot_rdata_item_t *items, uint count)
+{
+	if (rdata == NULL || items == NULL || count == 0 ||
+	    rdata->items != NULL) {
+		return KNOT_EBADARG;
+	}
+
+	assert(rdata->count == 0);
+	if ((rdata->items = (knot_rdata_item_t *)malloc(
+			     count * sizeof(knot_rdata_item_t))) == NULL) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	memcpy(rdata->items, items, count * sizeof(knot_rdata_item_t));
+	rdata->count = count;
+
+	/*! \todo Cannot determine items type, so the dname
+	 *        refcounters should be increased in caller.
+	 */
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rdata_item_t *knot_rdata_item(const knot_rdata_t *rdata,
+					     uint pos)
+{
+	if (pos >= rdata->count) {
+		return NULL;
+	} else {
+		return &rdata->items[pos];
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_item_t *knot_rdata_get_item(const knot_rdata_t *rdata,
+					   uint pos)
+{
+	if (pos >= rdata->count) {
+		return NULL;
+	} else {
+		return &rdata->items[pos];
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_item_set_dname(knot_rdata_t *rdata, uint pos,
+				knot_dname_t *dname)
+{
+	if (pos >= rdata->count) {
+		return KNOT_EBADARG;
+	}
+
+	/* Retain dname. */
+	knot_dname_retain(dname);
+
+	rdata->items[pos].dname = dname;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_item_set_raw_data(knot_rdata_t *rdata, uint pos,
+				   uint16_t *raw_data)
+{
+	if (pos >= rdata->count) {
+		return KNOT_EBADARG;
+	}
+
+	rdata->items[pos].raw_data = raw_data;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_rdata_free(knot_rdata_t **rdata)
+{
+	if (rdata == NULL || *rdata == NULL) {
+		return;
+	}
+
+	if ((*rdata)->items) {
+		free((*rdata)->items);
+	}
+	free(*rdata);
+	*rdata = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_rdata_deep_free(knot_rdata_t **rdata, uint type,
+			    int free_all_dnames)
+{
+	if (rdata == NULL || *rdata == NULL) {
+		return;
+	}
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	assert(desc != NULL);
+
+	assert((*rdata)->count <= desc->length);
+
+	for (int i = 0; i < (*rdata)->count; i++) {
+		if (&((*rdata)->items[i]) == NULL) {
+			continue;
+		}
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME
+		    || desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+		    || desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME ) {
+			if (((*rdata)->items[i].dname != NULL)) {
+				/*! \todo This is hack to prevent memory errors,
+				 *        as the rdata_set_items() cannot determine
+				 *        items type and so cannot increment
+				 *        reference count in case of dname type.
+				 *        Free would then release dnames that
+				 *        aren't referenced by the rdata.
+				 */
+				if (free_all_dnames) {
+					knot_dname_release((*rdata)->items[i].dname);
+				}
+			}
+		} else {
+			free((*rdata)->items[i].raw_data);
+		}
+	}
+
+	if ((*rdata)->items) {
+		free((*rdata)->items);
+	}
+	free(*rdata);
+	*rdata = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+/* CLEANUP */
+//uint knot_rdata_wire_size(const knot_rdata_t *rdata,
+//                            const uint8_t *format)
+//{
+//	uint size = 0;
+
+//	for (int i = 0; i < rdata->count; ++i) {
+//		switch (format[i]) {
+//		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_LITERAL_DNAME:
+//			size += knot_dname_size(rdata->items[i].dname);
+//			break;
+//		case KNOT_RDATA_WF_BYTE:
+//			size += 1;
+//			break;
+//		case KNOT_RDATA_WF_SHORT:
+//			size += 2;
+//			break;
+//		case KNOT_RDATA_WF_LONG:
+//			size += 4;
+//			break;
+//		case KNOT_RDATA_WF_A:
+//			size += 4;
+//			break;
+//		case KNOT_RDATA_WF_AAAA:
+//			size += 16;
+//			break;
+//		case KNOT_RDATA_WF_BINARY:
+//		case KNOT_RDATA_WF_APL:            // saved as binary
+//		case KNOT_RDATA_WF_IPSECGATEWAY:   // saved as binary
+//			size += rdata->items[i].raw_data[0];
+//			break;
+//		case KNOT_RDATA_WF_TEXT:
+//		case KNOT_RDATA_WF_BINARYWITHLENGTH:
+//			size += rdata->items[i].raw_data[0] + 1;
+//			break;
+//		default:
+//			assert(0);
+//		}
+//	}
+//	return size;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+//int knot_rdata_to_wire(const knot_rdata_t *rdata, const uint8_t *format,
+//                         uint8_t *buffer, uint buf_size)
+//{
+//	uint copied = 0;
+//	uint8_t tmp[KNOT_MAX_RDATA_WIRE_SIZE];
+//	uint8_t *to = tmp;
+
+//	for (int i = 0; i < rdata->count; ++i) {
+//		assert(copied < KNOT_MAX_RDATA_WIRE_SIZE);
+
+//		const uint8_t *from = (uint8_t *)rdata->items[i].raw_data;
+//		uint size = 0;
+
+//		switch (format[i]) {
+//		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_LITERAL_DNAME:
+//			size = knot_dname_size(rdata->items[i].dname);
+//			from = knot_dname_name(rdata->items[i].dname);
+
+//			break;
+//		case KNOT_RDATA_WF_BYTE:
+//			size = 1;
+//			break;
+//		case KNOT_RDATA_WF_SHORT:
+//			size = 2;
+//			break;
+//		case KNOT_RDATA_WF_LONG:
+//			size = 4;
+//			break;
+//		case KNOT_RDATA_WF_A:
+//			size = 4;
+//			break;
+//		case KNOT_RDATA_WF_AAAA:
+//			size = 16;
+//			break;
+//		case KNOT_RDATA_WF_TEXT:
+//		case KNOT_RDATA_WF_BINARYWITHLENGTH:
+//			// size stored in the first two bytes, but in little
+//			// endian and we need only the lower byte from it
+//			*to = *from; // lower byte is the first in little endian
+//			to += 1;
+//		case KNOT_RDATA_WF_BINARY:
+//		case KNOT_RDATA_WF_APL:            // saved as binary
+//		case KNOT_RDATA_WF_IPSECGATEWAY:   // saved as binary
+//			// size stored in the first two bytes, those bytes
+//			// must not be copied
+//			size = rdata->items[i].raw_data[0];
+//			from += 2; // skip the first two bytes
+//			break;
+//		default:
+//			assert(0);
+//		}
+
+//		assert(size != 0);
+//		assert(copied + size < KNOT_MAX_RDATA_WIRE_SIZE);
+
+//		memcpy(to, from, size);
+//		to += size;
+//		copied += size;
+//	}
+
+//	if (copied > buf_size) {
+//		dbg_rdata("Not enough place allocated for function "
+//		            "knot_rdata_to_wire(). Allocated %u, need %u\n",
+//		            buf_size, copied);
+//		return -1;
+//	}
+
+//	memcpy(buffer, tmp, copied);
+//	return 0;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_t *knot_rdata_deep_copy(const knot_rdata_t *rdata, 
+                                       uint16_t type)
+{
+	knot_rdata_t *copy = knot_rdata_new();
+	CHECK_ALLOC_LOG(copy, NULL);
+
+
+	if ((copy->items = (knot_rdata_item_t *)malloc(
+			rdata->count * sizeof(knot_rdata_item_t))) == NULL) {
+		knot_rdata_free(&copy);
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	copy->count = rdata->count;
+
+	knot_rrtype_descriptor_t *d = knot_rrtype_descriptor_by_type(type);
+
+	assert(copy->count <= d->length);
+
+	// copy all items one by one
+	for (int i = 0; i < copy->count; ++i) {
+		if (d->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME
+		    || d->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+		    || d->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME) {
+			copy->items[i].dname =
+				knot_dname_deep_copy(rdata->items[i].dname);
+		} else {
+			copy->items[i].raw_data = (uint16_t *)malloc(
+					rdata->items[i].raw_data[0] + 2);
+			if (copy->items[i].raw_data == NULL) {
+				knot_rdata_deep_free(&copy, type, 1);
+				return NULL;
+			}
+			memcpy(copy->items[i].raw_data,
+			       rdata->items[i].raw_data,
+			       rdata->items[i].raw_data[0] + 2);
+		}
+	}
+
+	return copy;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rdata_compare(const knot_rdata_t *r1, const knot_rdata_t *r2,
+			 const uint8_t *format)
+{
+	uint count = (r1->count < r2->count) ? r1->count : r2->count;
+
+	int cmp = 0;
+
+	for (int i = 0; i < count; ++i) {
+		/* CLEANUP */
+//		const uint8_t *data1, *data2;
+//		int size1, size2;
+
+		if (format[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		    format[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		    format[i] == KNOT_RDATA_WF_LITERAL_DNAME) {
+			cmp = knot_dname_compare(r1->items[i].dname,
+			                           r2->items[i].dname);
+//			data1 = knot_dname_name(r1->items[i].dname);
+//			data2 = knot_dname_name(r2->items[i].dname);
+//			size1 = knot_dname_size(r2->items[i].dname);
+//			size2 = knot_dname_size(r2->items[i].dname);
+		} else {
+			cmp = knot_rdata_compare_binary(
+				(uint8_t *)(r1->items[i].raw_data + 1),
+				(uint8_t *)(r2->items[i].raw_data + 1),
+				r1->items[i].raw_data[0],
+				r1->items[i].raw_data[0]);
+//			data1 = (uint8_t *)(r1->items[i].raw_data + 1);
+//			data2 = (uint8_t *)(r2->items[i].raw_data + 1);
+//			size1 = r1->items[i].raw_data[0];
+//			size2 = r1->items[i].raw_data[0];
+		}
+
+//		cmp =
+
+		if (cmp != 0) {
+			return cmp;
+		}
+	}
+
+	assert(cmp == 0);
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_rdata_cname_name(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 1) {
+		return NULL;
+	}
+	return rdata->items[0].dname;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_rdata_dname_target(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 1) {
+		return NULL;
+	}
+	return rdata->items[0].dname;
+}
+
+/*---------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_rdata_get_name(const knot_rdata_t *rdata,
+                                            uint16_t type)
+{
+	// iterate over the rdata items or act as if we knew where the name is?
+
+	switch (type) {
+	case KNOT_RRTYPE_NS:
+		return knot_rdata_ns_name(rdata);
+	case KNOT_RRTYPE_MX:
+		return knot_rdata_mx_name(rdata);
+	case KNOT_RRTYPE_SRV:
+		return knot_rdata_srv_name(rdata);
+	case KNOT_RRTYPE_CNAME:
+		return knot_rdata_cname_name(rdata);
+	}
+
+	return NULL;
+}
+
+/*---------------------------------------------------------------------------*/
+int64_t knot_rdata_soa_serial(const knot_rdata_t *rdata)
+{
+	if (!rdata) {
+		return -1;
+	}
+
+	if (rdata->count < 3) {
+		return -1;
+	}
+
+	// the number is in network byte order, transform it
+	return knot_wire_read_u32((uint8_t *)(rdata->items[2].raw_data + 1));
+}
+
+/*---------------------------------------------------------------------------*/
+
+uint32_t knot_rdata_soa_refresh(const knot_rdata_t *rdata)
+{
+	if (!rdata) {
+		return 0;
+	}
+
+	if (rdata->count < 4) {
+		return 0;	/*! \todo Some other error value. */
+	}
+
+	// the number is in network byte order, transform it
+	return knot_wire_read_u32((uint8_t *)(rdata->items[3].raw_data + 1));
+}
+
+/*---------------------------------------------------------------------------*/
+
+uint32_t knot_rdata_soa_retry(const knot_rdata_t *rdata)
+{
+	if (!rdata) {
+		return 0;
+	}
+
+	if (rdata->count < 5) {
+		return 0;	/*! \todo Some other error value. */
+	}
+
+	// the number is in network byte order, transform it
+	return knot_wire_read_u32((uint8_t *)(rdata->items[4].raw_data + 1));
+}
+
+/*---------------------------------------------------------------------------*/
+
+uint32_t knot_rdata_soa_expire(const knot_rdata_t *rdata)
+{
+	if (!rdata) {
+		return -1;
+	}
+
+	if (rdata->count < 6) {
+		return 0;	/*! \todo Some other error value. */
+	}
+
+	// the number is in network byte order, transform it
+	return knot_wire_read_u32((uint8_t *)(rdata->items[5].raw_data + 1));
+}
+
+/*---------------------------------------------------------------------------*/
+
+uint16_t knot_rdata_rrsig_type_covered(const knot_rdata_t *rdata)
+{
+	if (rdata->count < 1) {
+		return 0;
+	}
+
+	return knot_wire_read_u16((uint8_t *)(rdata->items[0].raw_data + 1));
+}
diff --git a/src/libknot/rdata.h b/src/libknot/rdata.h
new file mode 100644
index 0000000..5d328c9
--- /dev/null
+++ b/src/libknot/rdata.h
@@ -0,0 +1,339 @@
+/*!
+ * \file rdata.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Structures representing RDATA and its items and API for manipulating
+ *        both.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_RDATA_H_
+#define _KNOT_RDATA_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "dname.h"
+#include "util/descriptor.h"
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief RDATA item structure.
+ *
+ * Each RDATA may be logically divided into items, each of possible different
+ * type. This structure distinguishes between general data (\a raw_data)
+ * represented as an array of octets, and domain name (\a dname) as domain names
+ * require special treatment within some RDATA (e.g. compressing in packets).
+ */
+union knot_rdata_item {
+	knot_dname_t *dname; /*!< RDATA item represented as a domain name. */
+
+	/*!
+	 * \brief RDATA item represented as raw array of octets.
+	 *
+	 * The first two bytes hold the length of the item in bytes. The length
+	 * is stored in little endian.
+	 *
+	 * In some cases the stored length is also used in the wire format of
+	 * RDATA (e.g. character-data as defined in RFC1035). In such case,
+	 * the length should be less than 256, so that it fits into one byte
+	 * in the wireformat.
+	 *
+	 * \todo Store the length in system byte order.
+	 */
+	uint16_t *raw_data;
+};
+
+typedef union knot_rdata_item knot_rdata_item_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief RDATA structure.
+ *
+ * Each RDATA may be logically divided into items, each of possible different
+ * type (see knot_rdata_item). This structure stores an array of such items.
+ * It is not dynamic, so any RDATA structure may hold either 0 or one specified
+ * number of items which cannot be changed later. However, the number of items
+ * may be different for each RDATA structure. The number of items should be
+ * given by descriptors for each RR type. Some types may have variable number
+ * of items. In such cases, the last item in the array will be set tu NULL
+ * to distinguish the actual count of items.
+ *
+ * This structure does not hold information about the RDATA items, such as
+ * what type is which item or how long are they. This information should be
+ * stored elsewhere (in descriptors) as it is RR-specific and given for each
+ * RR type.
+ *
+ * \todo Find out whether NULL is appropriate value. If it is a possible
+ *       value for some of the items, we must find some other way to deal with
+ *       this.
+ * \todo Add some function for freeing particular item? Or a non-const getter?
+ */
+struct knot_rdata {
+	knot_rdata_item_t *items; /*!< RDATA items comprising this RDATA. */
+	unsigned int count; /*! < Count of RDATA items in this RDATA. */
+	struct knot_rdata *next; /*!< Next RDATA item in a linked list. */
+};
+
+typedef struct knot_rdata knot_rdata_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates an empty RDATA structure.
+ *
+ * \return Pointer to the new RDATA structure or NULL if an error occured.
+ */
+knot_rdata_t *knot_rdata_new();
+
+/*!
+ * \brief Parses RDATA from the given data in wire format.
+ *
+ * \param rdata RDATA to fill.
+ * \param wire Wire format of the whole data in which the RDATA are present.
+ * \param pos Position in \a wire where to start parsing.
+ * \param total_size Size of the whole data.
+ * \param rdlength Size of the RDATA to parse in bytes.
+ * \param desc RR type descriptor for the RDATA type.
+ *
+ * \retval KNOT_ENOMEM
+ * \retval KNOT_EFEWDATA
+ * \retval KNOT_EMALF
+ * \retval KNOT_ERROR
+ * \retval KNOT_EOK
+ */
+int knot_rdata_from_wire(knot_rdata_t *rdata, const uint8_t *wire,
+                           size_t *pos, size_t total_size, size_t rdlength,
+                           const knot_rrtype_descriptor_t *desc);
+
+/*!
+ * \brief Sets the RDATA item on position \a pos.
+ *
+ * \param rdata RDATA structure in which the item should be set.
+ * \param pos Position of the RDATA item to be set.
+ * \param item RDATA item value to be set.
+ *
+ * \retval KNOT_EOK if successful.
+ * \retval KNOT_EBADARG if \a pos is not a valid position.
+ *
+ * \todo Use the union or a pointer to it as parameter? IMHO there is always
+ *       only one pointer that is copied, so it doesn't matter.
+ */
+int knot_rdata_set_item(knot_rdata_t *rdata, unsigned int pos,
+                          knot_rdata_item_t item);
+
+/*!
+ * \brief Sets all RDATA items within the given RDATA structure.
+ *
+ * \a rdata must be empty so far (\a rdata->count == 0). The necessary space
+ * is allocated.
+ *
+ * This function copies the array of RDATA items from \a items to \a rdata.
+ *
+ * \param rdata RDATA structure to store the items in.
+ * \param items An array of RDATA items to be stored in this RDATA structure.
+ * \param count Count of RDATA items to be stored.
+ *
+ * \retval 0 if successful.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_rdata_set_items(knot_rdata_t *rdata,
+                           const knot_rdata_item_t *items,
+                           unsigned int count);
+
+unsigned int knot_rdata_item_count(const knot_rdata_t *rdata);
+
+/*!
+ * \brief Returns the RDATA item on position \a pos.
+ *
+ * \note Although returning union would be OK (no overhead), we need to be able
+ *       to distinguish errors (in this case by returning NULL).
+ *
+ * \param rdata RDATA structure to get the item from.
+ * \param pos Position of the item to retrieve.
+ *
+ * \return The RDATA item on position \a pos, or NULL if such position does not
+ *         exist within the given RDATA structure.
+ */
+knot_rdata_item_t *knot_rdata_get_item(const knot_rdata_t *rdata,
+                                           unsigned int pos);
+
+/*!
+ * \brief Returns the RDATA item on position \a pos.
+ *
+ * \note Although returning union would be OK (no overhead), we need to be able
+ *       to distinguish errors (in this case by returning NULL).
+ * \note This function is identical to knot_rdata_get_item(), only it returns
+ *       constant data.
+ *
+ * \param rdata RDATA structure to get the item from.
+ * \param pos Position of the item to retrieve.
+ *
+ * \return The RDATA item on position \a pos, or NULL if such position does not
+ *         exist within the given RDATA structure.
+ */
+const knot_rdata_item_t *knot_rdata_item(const knot_rdata_t *rdata,
+                                             unsigned int pos);
+
+/*!
+ * \brief Sets the given domain name as a value of RDATA item on position
+ *        \a pos.
+ *
+ * \param rdata RDATA structure to set the item in.
+ * \param pos Position of the RDATA item to set.
+ * \param dname Domain name to set to the item.
+ *
+ * \retval KNOT_EOK if successful.
+ * \retval KNOT_EBADARG
+ */
+int knot_rdata_item_set_dname(knot_rdata_t *rdata, unsigned int pos,
+                                knot_dname_t *dname);
+
+/*!
+ * \brief Sets the given raw data as a value of RDATA item on position \a pos.
+ *
+ * \param rdata RDATA structure to set the item in.
+ * \param pos Position of the RDATA item to set.
+ * \param raw_data Raw data to set to the item.
+ *
+ * \retval KNOT_EOK if successful.
+ * \retval KNOT_EBADARG
+ */
+int knot_rdata_item_set_raw_data(knot_rdata_t *rdata, unsigned int pos,
+                                   uint16_t *raw_data);
+
+/*!
+ * \brief Copies the given RDATA.
+ *
+ * \param rdata RDATA to copy.
+ * \param type RR type of the RDATA.
+ *
+ * \return Copy of \a rdata.
+ */
+knot_rdata_t *knot_rdata_deep_copy(const knot_rdata_t *rdata, 
+                                       uint16_t type);
+
+/*!
+ * \brief Destroys the RDATA structure without deleting RDATA items.
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param rdata RDATA structure to be destroyed.
+ */
+void knot_rdata_free(knot_rdata_t **rdata);
+
+/*!
+ * \brief Destroys the RDATA structure and all its RDATA items.
+ *
+ * RDATA items are deleted according to the given RR Type. In case of domain
+ * name, it is deallocated only if either the free_all_dnames parameter is set
+ * to <> 0 or the name does not contain reference to a node (i.e. it is not an
+ * owner of some node) or if it does contain a reference to a node, but is
+ * not equal to its owner. (If free_all_dnames is set to <> 0, no other
+ * condition is evaluated.)
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param rdata RDATA structure to be destroyed.
+ * \param type RR Type of the RDATA.
+ * \param free_all_dnames Set to <> 0 if you want to delete ALL domain names
+ *                        from the RDATA. Set to 0 otherwise.
+ */
+void knot_rdata_deep_free(knot_rdata_t **rdata, unsigned int type,
+                            int free_all_dnames);
+
+/*!
+ * \brief Compares two RDATAs of the same type.
+ *
+ * \note Compares domain names normally (dname_compare()), i.e.
+ *       case-insensitive.
+ *
+ * \param r1 First RDATA.
+ * \param r2 Second RDATA.
+ * \param format Descriptor of the RDATA format.
+ *
+ * \retval 0 if RDATAs are equal.
+ * \retval < 0 if \a r1 goes before \a r2 in canonical order.
+ * \retval > 0 if \a r1 goes after \a r2 in canonical order.
+ */
+int knot_rdata_compare(const knot_rdata_t *r1, const knot_rdata_t *r2,
+                         const uint8_t *format);
+
+/*!
+ * \brief Retrieves the domain name from CNAME RDATA.
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the first
+ *       RDATA item, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the CNAME domain name from.
+ *
+ * \return Canonical name stored in \a rdata or NULL if \a rdata has no items.
+ */
+const knot_dname_t *knot_rdata_cname_name(const knot_rdata_t *rdata);
+
+/*!
+ * \brief Retrieves the domain name from DNAME RDATA.
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the first
+ *       RDATA item, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the DNAME domain name from.
+ *
+ * \return Target domain name stored in \a rdata or NULL if \a rdata has no
+ *         items.
+ */
+const knot_dname_t *knot_rdata_dname_target(const knot_rdata_t *rdata);
+
+/*!
+ * \brief Retrieves the domain name from RDATA of given type.
+ *
+ * Supported types:
+ * - KNOT_RRTYPE_NS
+ * - KNOT_RRTYPE_MX
+ * - KNOT_RRTYPE_SRV
+ * - KNOT_RRTYPE_CNAME
+ *
+ * \note This is only convenience function. It does not (and cannot) check if
+ *       the given RDATA is of the right type, so it always returns the RDATA
+ *       item according to the given type, even if it is not a domain name.
+ *
+ * \param rdata RDATA to get the domain name from.
+ * \param type RR type of the RDATA.
+ *
+ * \return Domain name stored in \a rdata or NULL if \a rdata has not enough
+ *         items.
+ */
+const knot_dname_t *knot_rdata_get_name(const knot_rdata_t *rdata,
+                                            uint16_t type);
+
+int64_t knot_rdata_soa_serial(const knot_rdata_t *rdata);
+
+uint32_t knot_rdata_soa_refresh(const knot_rdata_t *rdata);
+uint32_t knot_rdata_soa_retry(const knot_rdata_t *rdata);
+uint32_t knot_rdata_soa_expire(const knot_rdata_t *rdata);
+
+uint16_t knot_rdata_rrsig_type_covered(const knot_rdata_t *rdata);
+
+#endif /* _KNOT_RDATA_H */
+
+/*! @} */
diff --git a/src/libknot/rrset.c b/src/libknot/rrset.c
new file mode 100644
index 0000000..6083f77
--- /dev/null
+++ b/src/libknot/rrset.c
@@ -0,0 +1,719 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include "common.h"
+#include "rrset.h"
+#include "util/descriptor.h"
+#include "util/error.h"
+#include "util/utils.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+static void knot_rrset_disconnect_rdata(knot_rrset_t *rrset,
+                                    knot_rdata_t *prev, knot_rdata_t *rdata)
+{
+	if (prev == NULL) {
+		// find the previous RDATA in the series, as its pointer must
+		// be changed
+		prev = rdata->next;
+		while (prev->next != rdata) {
+			prev = prev->next;
+		}
+	}
+
+	assert(prev);
+	assert(prev->next == rdata);
+
+	prev->next = rdata->next;
+
+	if (rrset->rdata == rdata) {
+		if (rdata->next == rdata) {
+			rrset->rdata = NULL;
+		} else {
+			rrset->rdata = rdata->next;
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_rrset_t *knot_rrset_new(knot_dname_t *owner, uint16_t type,
+                                 uint16_t rclass, uint32_t ttl)
+{
+	knot_rrset_t *ret = malloc(sizeof(knot_rrset_t));
+	if (ret == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	ret->rdata = NULL;
+
+	/* Retain reference to owner. */
+	knot_dname_retain(owner);
+
+	ret->owner = owner;
+	ret->type = type;
+	ret->rclass = rclass;
+	ret->ttl = ttl;
+	ret->rrsigs = NULL;
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_add_rdata(knot_rrset_t *rrset, knot_rdata_t *rdata)
+{
+	if (rrset == NULL || rdata == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (rrset->rdata == NULL) {
+		rrset->rdata = rdata;
+		rrset->rdata->next = rrset->rdata;
+	} else {
+		knot_rdata_t *tmp;
+
+		tmp = rrset->rdata;
+
+		while (tmp->next != rrset->rdata) {
+			tmp = tmp->next;
+		}
+		rdata->next = tmp->next;
+		tmp->next = rdata;
+	}
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_t *knot_rrset_remove_rdata(knot_rrset_t *rrset,
+                                          const knot_rdata_t *rdata)
+{
+	if (rrset == NULL || rdata == NULL) {
+		return NULL;
+	}
+
+	knot_rdata_t *prev = NULL;
+	knot_rdata_t *rr = rrset->rdata;
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(rrset->type);
+
+	if (desc == NULL) {
+		return NULL;
+	}
+
+	while (rr != NULL) {
+		/*! \todo maybe the dnames should be compared case-insensitive*/
+		if (knot_rdata_compare(rr, rdata, desc->wireformat) == 0) {
+			knot_rrset_disconnect_rdata(rrset, prev, rr);
+			return rr;
+		}
+		prev = rr;
+		rr = knot_rrset_rdata_get_next(rrset, rr);
+	}
+
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_set_rrsigs(knot_rrset_t *rrset, knot_rrset_t *rrsigs)
+{
+	if (rrset == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	rrset->rrsigs = rrsigs;
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_add_rrsigs(knot_rrset_t *rrset, knot_rrset_t *rrsigs,
+                            knot_rrset_dupl_handling_t dupl)
+{
+	if (rrset == NULL || rrsigs == NULL
+	    || knot_dname_compare(rrset->owner, rrsigs->owner) != 0) {
+		return KNOT_EBADARG;
+	}
+
+	int rc;
+	if (rrset->rrsigs != NULL) {
+		if (dupl == KNOT_RRSET_DUPL_MERGE) {
+			rc = knot_rrset_merge((void **)&rrset->rrsigs,
+			                        (void **)&rrsigs);
+			if (rc != KNOT_EOK) {
+				return rc;
+			} else {
+				return 1;
+			}
+		} else if (dupl == KNOT_RRSET_DUPL_SKIP) {
+			return 2;
+		} else if (dupl == KNOT_RRSET_DUPL_REPLACE) {
+			rrset->rrsigs = rrsigs;
+		}
+	} else {
+		rrset->rrsigs = rrsigs;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_rrset_owner(const knot_rrset_t *rrset)
+{
+	return rrset->owner;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_rrset_get_owner(const knot_rrset_t *rrset)
+{
+	return rrset->owner;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_rrset_set_owner(knot_rrset_t *rrset, knot_dname_t* owner)
+{
+	if (rrset) {
+		/* Retain new owner and release old owner. */
+		knot_dname_retain(owner);
+		knot_dname_release(rrset->owner);
+		rrset->owner = owner;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_rrset_type(const knot_rrset_t *rrset)
+{
+	return rrset->type;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_rrset_class(const knot_rrset_t *rrset)
+{
+	return rrset->rclass;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint32_t knot_rrset_ttl(const knot_rrset_t *rrset)
+{
+	return rrset->ttl;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rdata_t *knot_rrset_rdata(const knot_rrset_t *rrset)
+{
+	return rrset->rdata;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rdata_t *knot_rrset_rdata_next(const knot_rrset_t *rrset,
+                                              const knot_rdata_t *rdata)
+{
+	if (rdata == NULL) {
+		return rrset->rdata;
+	}
+	if (rdata->next == rrset->rdata) {
+		return NULL;
+	} else {
+		return rdata->next;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_t *knot_rrset_get_rdata(knot_rrset_t *rrset)
+{
+	if (rrset == NULL) {
+		return NULL;
+	} else {
+		return rrset->rdata;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rdata_t *knot_rrset_rdata_get_next(knot_rrset_t *rrset,
+                                            knot_rdata_t *rdata)
+{
+	if (rdata->next == rrset->rdata) {
+		return NULL;
+	} else {
+		return rdata->next;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_rdata_rr_count(const knot_rrset_t *rrset)
+{
+	int count = 0;
+	const knot_rdata_t *rdata = rrset->rdata;
+	
+	while (rdata != NULL) {
+		++count;
+		rdata = knot_rrset_rdata_next(rrset, rdata);
+	}
+	
+	return count;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t *knot_rrset_rrsigs(const knot_rrset_t *rrset)
+{
+	if (rrset == NULL) {
+		assert(0);
+		return NULL;
+	} else {
+		return rrset->rrsigs;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rrset_t *knot_rrset_get_rrsigs(knot_rrset_t *rrset)
+{
+	if (rrset == NULL) {
+		assert(0);
+		return NULL;
+	} else {
+		return rrset->rrsigs;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_compare_rdata(const knot_rrset_t *r1, const knot_rrset_t *r2)
+{
+	if (r1 == NULL || r2 == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(r1->type);
+	if (desc == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// compare RDATA sets (order is not significant)
+	const knot_rdata_t *rdata1= knot_rrset_rdata(r1);
+	const knot_rdata_t *rdata2;
+
+	// find all RDATA from r1 in r2
+	while (rdata1 != NULL) {
+		 rdata2 = knot_rrset_rdata(r2);
+		 while (rdata2 != NULL && knot_rdata_compare(rdata1, rdata2,
+		                                            desc->wireformat)) {
+			 rdata2 = knot_rrset_rdata_next(r2, rdata2);
+		 }
+
+		 if (rdata2 == NULL) {
+			 // RDATA from r1 not found in r2
+			 return 0;
+		 }
+
+		 // otherwise it was found, continue with next r1 RDATA
+		 rdata1 = knot_rrset_rdata_next(r1, rdata1);
+	}
+
+	// find all RDATA from r2 in r1 (this can be done in a better way)
+	rdata2 = knot_rrset_rdata(r2);
+	while (rdata2 != NULL) {
+		 rdata1 = knot_rrset_rdata(r1);
+		 while (rdata2 != NULL && knot_rdata_compare(rdata1, rdata2,
+		                                            desc->wireformat)) {
+			 rdata1 = knot_rrset_rdata_next(r1, rdata1);
+		 }
+
+		 if (rdata1 == NULL) {
+			 // RDATA from r1 not found in r2
+			 return 0;
+		 }
+
+		 // otherwise it was found, continue with next r1 RDATA
+		 rdata2 = knot_rrset_rdata_next(r2, rdata2);
+	}
+
+	// all RDATA found
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_rrset_rr_to_wire(const knot_rrset_t *rrset, 
+                                 const knot_rdata_t *rdata, uint8_t **pos,
+                                 size_t max_size)
+{
+	int size = 0;
+	
+	assert(rrset != NULL);
+	assert(rrset->owner != NULL);
+	assert(rdata != NULL);
+	assert(pos != NULL);
+	assert(*pos != NULL);
+	
+	fprintf(stderr, "Max size: %zu, owner: %p, owner size: %d\n",
+	        max_size, rrset->owner, rrset->owner->size);
+
+	// check if owner fits
+	if (size + knot_dname_size(rrset->owner) + 10 > max_size) {
+		return KNOT_ESPACE;
+	}
+	
+	memcpy(*pos, knot_dname_name(rrset->owner), 
+	       knot_dname_size(rrset->owner));
+	*pos += knot_dname_size(rrset->owner);
+	size += knot_dname_size(rrset->owner);
+	
+	fprintf(stderr, "Max size: %zu, size: %d\n", max_size, size);
+
+	fprintf(stderr, "Wire format:\n");
+
+	// put rest of RR 'header'
+	knot_wire_write_u16(*pos, rrset->type);
+	fprintf(stderr, "  Type: %u\n", rrset->type);
+	*pos += 2;
+
+	knot_wire_write_u16(*pos, rrset->rclass);
+	fprintf(stderr, "  Class: %u\n", rrset->rclass);
+	*pos += 2;
+
+	knot_wire_write_u32(*pos, rrset->ttl);
+	fprintf(stderr, "  TTL: %u\n", rrset->ttl);
+	*pos += 4;
+
+	// save space for RDLENGTH
+	uint8_t *rdlength_pos = *pos;
+	*pos += 2;
+
+	size += 10;
+//	compr->wire_pos += size;
+	
+	fprintf(stderr, "Max size: %zu, size: %d\n", max_size, size);
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(rrset->type);
+
+	uint16_t rdlength = 0;
+
+	for (int i = 0; i < rdata->count; ++i) {
+		if (max_size < size + rdlength) {
+			return KNOT_ESPACE;
+		}
+		
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME: {
+			knot_dname_t *dname =
+				knot_rdata_item(rdata, i)->dname;
+			if (size + rdlength + dname->size > max_size) {
+				return KNOT_ESPACE;
+			}
+
+			// save whole domain name
+			memcpy(*pos, knot_dname_name(dname), 
+			       knot_dname_size(dname));
+			fprintf(stderr, "Uncompressed dname size: %d\n",
+			        knot_dname_size(dname));
+			*pos += knot_dname_size(dname);
+			rdlength += knot_dname_size(dname);
+//			compr->wire_pos += dname->size;
+			break;
+		}
+		default: {
+			uint16_t *raw_data =
+				knot_rdata_item(rdata, i)->raw_data;
+
+			if (size + rdlength + raw_data[0] > max_size) {
+				return KNOT_ESPACE;
+			}
+
+			// copy just the rdata item data (without size)
+			memcpy(*pos, raw_data + 1, raw_data[0]);
+			fprintf(stderr, "Raw data size: %d\n", raw_data[0]);
+			*pos += raw_data[0];
+			rdlength += raw_data[0];
+//			compr->wire_pos += raw_data[0];
+			break;
+		}
+		}
+	}
+	
+	fprintf(stderr, "Max size: %zu, size: %d\n", max_size, size);
+
+	assert(size + rdlength <= max_size);
+	size += rdlength;
+	knot_wire_write_u16(rdlength_pos, rdlength);
+
+	return size;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_to_wire(const knot_rrset_t *rrset, uint8_t *wire, size_t *size,
+                       int *rr_count)
+{
+	// if no RDATA in RRSet, return
+	if (rrset->rdata == NULL) {
+		*size = 0;
+		*rr_count = 0;
+		return KNOT_EOK;
+	}
+	
+
+	uint8_t *pos = wire;
+	int rrs = 0;
+	short rrset_size = 0;
+
+	const knot_rdata_t *rdata = rrset->rdata;
+	do {
+		int ret = knot_rrset_rr_to_wire(rrset, rdata, &pos, 
+		                                *size - rrset_size);
+
+		assert(ret != 0);
+
+		if (ret < 0) {
+			// some RR didn't fit in, so no RRs should be used
+			// TODO: remove last entries from compression table
+			fprintf(stderr, "Some RR didn't fit in.\n");
+			return KNOT_ESPACE;
+		}
+
+		fprintf(stderr, "RR of size %d added.\n", ret);
+		rrset_size += ret;
+		++rrs;
+	} while ((rdata = knot_rrset_rdata_next(rrset, rdata)) != NULL);
+
+	// the whole RRSet did fit in
+	assert(rrset_size <= *size);
+	assert(pos - wire == rrset_size);
+	*size = rrset_size;
+
+	fprintf(stderr, "  Size after: %zu\n", *size);
+
+	*rr_count = rrs;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_compare(const knot_rrset_t *r1,
+                       const knot_rrset_t *r2,
+                       knot_rrset_compare_type_t cmp)
+{
+	if (cmp == KNOT_RRSET_COMPARE_PTR) {
+		return (r1 == r2);
+	}
+
+	int res = ((r1->rclass == r2->rclass)
+	           && (r1->type == r2->type)
+	           && (r1->ttl == r2->ttl)
+	           && knot_dname_compare(r1->owner, r2->owner) == 0);
+
+	if (cmp == KNOT_RRSET_COMPARE_WHOLE && res) {
+		res = knot_rrset_compare_rdata(r1, r2);
+		if (res < 0) {
+			return 0;
+		}
+	}
+
+	return res;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_deep_copy(const knot_rrset_t *from, knot_rrset_t **to)
+{
+	if (from == NULL || to == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int ret;
+
+	*to = (knot_rrset_t *)calloc(1, sizeof(knot_rrset_t));
+	CHECK_ALLOC_LOG(*to, KNOT_ENOMEM);
+
+	(*to)->owner = knot_dname_deep_copy(from->owner);
+	(*to)->rclass = from->rclass;
+	(*to)->ttl = from->ttl;
+	(*to)->type = from->type;
+	if (from->rrsigs != NULL) {
+		ret = knot_rrset_deep_copy(from->rrsigs, &(*to)->rrsigs);
+		if (ret != KNOT_EOK) {
+			knot_rrset_deep_free(to, 1, 0, 0);
+			return ret;
+		}
+	}
+	assert((*to)->rrsigs == NULL || from->rrsigs != NULL);
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(from);
+
+	/*! \note Order of RDATA will be reversed. */
+	while (rdata != NULL) {
+		ret = knot_rrset_add_rdata(*to, knot_rdata_deep_copy(rdata,
+		                           knot_rrset_type(from)));
+		if (ret != KNOT_EOK) {
+			knot_rrset_deep_free(to, 1, 1, 1);
+			return ret;
+		}
+		rdata = knot_rrset_rdata_next(from, rdata);
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_shallow_copy(const knot_rrset_t *from, knot_rrset_t **to)
+{
+	*to = (knot_rrset_t *)malloc(sizeof(knot_rrset_t));
+	CHECK_ALLOC_LOG(*to, KNOT_ENOMEM);
+	
+	memcpy(*to, from, sizeof(knot_rrset_t));
+
+	/* Retain owner. */
+	knot_dname_retain((*to)->owner);
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_rrset_free(knot_rrset_t **rrset)
+{
+	if (rrset == NULL || *rrset == NULL) {
+		return;
+	}
+
+	/*! \todo Shouldn't we always release owner reference? */
+	knot_dname_release((*rrset)->owner);
+
+	free(*rrset);
+	*rrset = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_rrset_deep_free(knot_rrset_t **rrset, int free_owner,
+                            int free_rdata, int free_rdata_dnames)
+{
+	if (rrset == NULL || *rrset == NULL) {
+		return;
+	}
+
+	if (free_rdata) {
+		knot_rdata_t *tmp_rdata;
+		knot_rdata_t *next_rdata;
+		tmp_rdata = (*rrset)->rdata;
+
+		while ((tmp_rdata != NULL)
+		       && (tmp_rdata->next != (*rrset)->rdata)
+		       && (tmp_rdata->next != NULL)) {
+			next_rdata = tmp_rdata->next;
+			knot_rdata_deep_free(&tmp_rdata, (*rrset)->type,
+					       free_rdata_dnames);
+			tmp_rdata = next_rdata;
+		}
+
+		assert(tmp_rdata == NULL
+		       || tmp_rdata->next == (*rrset)->rdata);
+
+		knot_rdata_deep_free(&tmp_rdata, (*rrset)->type,
+		                       free_rdata_dnames);
+	}
+
+	// RRSIGs should have the same owner as this RRSet, so do not delete it
+	if ((*rrset)->rrsigs != NULL) {
+		knot_rrset_deep_free(&(*rrset)->rrsigs, 0, 1,
+		                       free_rdata_dnames);
+	}
+
+	/*! \todo Release owner every time? */
+	//if (free_owner) {
+		knot_dname_release((*rrset)->owner);
+	//}
+
+	free(*rrset);
+	*rrset = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_rrset_merge(void **r1, void **r2)
+{
+	knot_rrset_t *rrset1 = (knot_rrset_t *)(*r1);
+	knot_rrset_t *rrset2 = (knot_rrset_t *)(*r2);
+
+	if ((knot_dname_compare(rrset1->owner, rrset2->owner) != 0)
+	    || rrset1->rclass != rrset2->rclass
+	    || rrset1->type != rrset2->type
+	    || rrset1->ttl != rrset2->ttl) {
+		return KNOT_EBADARG;
+	}
+
+	// add all RDATAs from rrset2 to rrset1 (i.e. concatenate linked lists)
+
+	// no RDATA in RRSet 1
+	assert(rrset1 && rrset2);
+	if (rrset1->rdata == NULL) {
+		rrset1->rdata = rrset2->rdata;
+		return KNOT_EOK;
+	}
+
+	knot_rdata_t *tmp_rdata = rrset1->rdata;
+
+	if (!tmp_rdata) {
+		return KNOT_EOK;
+	}
+
+	while (tmp_rdata->next != rrset1->rdata) {
+		tmp_rdata = tmp_rdata->next;
+	}
+
+	tmp_rdata->next = rrset2->rdata;
+
+	tmp_rdata = rrset2->rdata; //maybe unnecessary, but is clearer
+
+	while (tmp_rdata->next != rrset2->rdata) {
+		tmp_rdata = tmp_rdata->next;
+	}
+
+	tmp_rdata->next = rrset1->rdata;
+
+	return KNOT_EOK;
+}
diff --git a/src/libknot/rrset.h b/src/libknot/rrset.h
new file mode 100644
index 0000000..7754c7f
--- /dev/null
+++ b/src/libknot/rrset.h
@@ -0,0 +1,306 @@
+/*!
+ * \file rrset.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief RRSet structure and API for manipulating it.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_RRSET_H_
+#define _KNOT_RRSET_H_
+
+#include <stdint.h>
+
+#include "dname.h"
+#include "rdata.h"
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure for representing an RRSet.
+ *
+ * For definition of a RRSet see RFC2181, Section 5.
+ *
+ * As all RRs within a RRSet share the same OWNER, TYPE, CLASS and TTL (see
+ * Section 5.2 of RFC2181), there is no need to duplicate these data in the
+ * program. Distinct Resource Records are thus represented only as distinct
+ * RDATA sections of corresponding RRs.
+ */
+struct knot_rrset {
+	/*! \brief Domain name being the owner of the RRSet. */
+	knot_dname_t *owner;
+	uint16_t type; /*!< TYPE of the RRset. */
+	uint16_t rclass; /*!< CLASS of the RRSet. */
+	uint32_t ttl; /*!< TTL of the RRSet. */
+	/*!
+	 * \brief First item in an ordered cyclic list of RDATA items.
+	 *
+	 * \note The fact that the list is cyclic will easily allow for
+	 *       possible round-robin rotation of RRSets.
+	 */
+	knot_rdata_t *rdata;
+	struct knot_rrset *rrsigs; /*!< Set of RRSIGs covering this RRSet. */
+};
+
+typedef struct knot_rrset knot_rrset_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef enum {
+	KNOT_RRSET_COMPARE_PTR,
+	KNOT_RRSET_COMPARE_HEADER,
+	KNOT_RRSET_COMPARE_WHOLE
+} knot_rrset_compare_type_t;
+
+typedef enum  {
+	KNOT_RRSET_DUPL_MERGE,
+	KNOT_RRSET_DUPL_REPLACE,
+	KNOT_RRSET_DUPL_SKIP
+} knot_rrset_dupl_handling_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a new RRSet with the given properties.
+ *
+ * The created RRSet contains no RDATAs (i.e. is actually empty).
+ *
+ * \param owner OWNER of the RRSet.
+ * \param type TYPE of the RRSet.
+ * \param rclass CLASS of the RRSet.
+ * \param ttl TTL of the RRset.
+ *
+ * \return New RRSet structure with the given OWNER, TYPE, CLASS and TTL or NULL
+ *         if an error occured.
+ */
+knot_rrset_t *knot_rrset_new(knot_dname_t *owner, uint16_t type,
+                                 uint16_t rclass, uint32_t ttl);
+
+/*!
+ * \brief Adds the given RDATA to the RRSet.
+ *
+ * \param rrset RRSet to add the RDATA to.
+ * \param rdata RDATA to add to the RRSet.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ *
+ * \todo Provide some function for comparing RDATAs.
+ */
+int knot_rrset_add_rdata(knot_rrset_t *rrset, knot_rdata_t *rdata);
+
+knot_rdata_t * knot_rrset_remove_rdata(knot_rrset_t *rrset,
+                                           const knot_rdata_t *rdata);
+
+/*!
+ * \brief Adds RRSIG signatures to this RRSet.
+ *
+ * \param rrset RRSet to add the signatures into.
+ * \param rrsigs Set of RRSIGs covering this RRSet.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_rrset_set_rrsigs(knot_rrset_t *rrset, knot_rrset_t *rrsigs);
+
+int knot_rrset_add_rrsigs(knot_rrset_t *rrset, knot_rrset_t *rrsigs,
+                            knot_rrset_dupl_handling_t dupl);
+
+/*!
+ * \brief Returns the Owner of the RRSet.
+ *
+ * \param rrset RRSet to get the Owner of.
+ *
+ * \return Owner of the given RRSet.
+ */
+const knot_dname_t *knot_rrset_owner(const knot_rrset_t *rrset);
+
+/*!
+ * \todo Document me.
+ */
+knot_dname_t *knot_rrset_get_owner(const knot_rrset_t *rrset);
+
+/*!
+ * \brief Set rrset owner to specified dname.
+ *
+ * Previous owner will be replaced if exist.
+ *
+ * \param rrset Specified RRSet.
+ * \param owner New owner dname.
+ */
+void knot_rrset_set_owner(knot_rrset_t *rrset, knot_dname_t* owner);
+
+/*!
+ * \brief Returns the TYPE of the RRSet.
+ *
+ * \param rrset RRSet to get the TYPE of.
+ *
+ * \return TYPE of the given RRSet.
+ */
+uint16_t knot_rrset_type(const knot_rrset_t *rrset);
+
+/*!
+ * \brief Returns the CLASS of the RRSet.
+ *
+ * \param rrset RRSet to get the CLASS of.
+ *
+ * \return CLASS of the given RRSet.
+ */
+uint16_t knot_rrset_class(const knot_rrset_t *rrset);
+
+/*!
+ * \brief Returns the TTL of the RRSet.
+ *
+ * \param rrset RRSet to get the TTL of.
+ *
+ * \return TTL of the given RRSet.
+ */
+uint32_t knot_rrset_ttl(const knot_rrset_t *rrset);
+
+/*!
+ * \brief Returns the first RDATA in the RRSet.
+ *
+ * RDATAs in a RRSet are stored in a ordered cyclic list.
+ *
+ * \note If later a round-robin rotation of RRSets is employed, the RDATA
+ *       returned by this function may not be the first RDATA in canonical
+ *       order.
+ *
+ * \param rrset RRSet to get the RDATA from.
+ *
+ * \return First RDATA in the given RRSet.
+ */
+const knot_rdata_t *knot_rrset_rdata(const knot_rrset_t *rrset);
+
+const knot_rdata_t *knot_rrset_rdata_next(const knot_rrset_t *rrset,
+                                              const knot_rdata_t *rdata);
+
+/*!
+ * \brief Returns the first RDATA in the RRSet (non-const version).
+ *
+ * RDATAs in a RRSet are stored in a ordered cyclic list.
+ *
+ * \note If later a round-robin rotation of RRSets is employed, the RDATA
+ *       returned by this function may not be the first RDATA in canonical
+ *       order.
+ *
+ * \param rrset RRSet to get the RDATA from.
+ *
+ * \return First RDATA in the given RRSet or NULL if there is none or if no
+ *         rrset was provided (\a rrset is NULL).
+ */
+knot_rdata_t *knot_rrset_get_rdata(knot_rrset_t *rrset);
+
+knot_rdata_t *knot_rrset_rdata_get_next(knot_rrset_t *rrset,
+                                            knot_rdata_t *rdata);
+
+int knot_rrset_rdata_rr_count(const knot_rrset_t *rrset);
+
+/*!
+ * \brief Returns the set of RRSIGs covering the given RRSet.
+ *
+ * \param rrset RRSet to get the signatures for.
+ *
+ * \return Set of RRSIGs which cover the given RRSet or NULL if there is none or
+ *         if no rrset was provided (\a rrset is NULL).
+ */
+const knot_rrset_t *knot_rrset_rrsigs(const knot_rrset_t *rrset);
+
+knot_rrset_t *knot_rrset_get_rrsigs(knot_rrset_t *rrset);
+
+int knot_rrset_compare_rdata(const knot_rrset_t *r1, const knot_rrset_t *r2);
+
+int knot_rrset_to_wire(const knot_rrset_t *rrset, uint8_t *wire, size_t *size,
+                       int *rr_count);
+
+/*!
+ * \brief Compares two RRSets.
+ *
+ * \note This function does not return 'standard' compare return values, because
+ *       there is no way to define which RRSet is 'larger'.
+ *
+ * \param r1 First RRSet.
+ * \param r2 Second RRSet.
+ * \param cmp Type of comparison to perform.
+ *
+ * \retval <> 0 If RRSets are equal.
+ * \retval 0 if RRSets are not equal.
+ */
+int knot_rrset_compare(const knot_rrset_t *r1,
+                         const knot_rrset_t *r2,
+                         knot_rrset_compare_type_t cmp);
+
+/*! \todo Add unit test. */
+int knot_rrset_deep_copy(const knot_rrset_t *from, knot_rrset_t **to);
+
+/*! \todo Add unit test. */
+int knot_rrset_shallow_copy(const knot_rrset_t *from, knot_rrset_t **to);
+
+/*!
+ * \brief Destroys the RRSet structure.
+ *
+ * Does not destroy the OWNER domain name structure, nor the signatures, as
+ * these may be used elsewhere.
+ *
+ * Does not destroy RDATA structures neither, as they need special processing.
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param rrset RRset to be destroyed.
+ */
+void knot_rrset_free(knot_rrset_t **rrset);
+
+/*!
+ * \brief Destroys the RRSet structure and all its substructures.
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param rrset RRset to be destroyed.
+ * \param free_owner Set to 0 if you do not want the owner domain name to be
+ *                   destroyed also. Set to <> 0 otherwise.
+ * \param free_rdata ***\todo DOCUMENT ME***
+ * \param free_rdata_dnames Set to <> 0 if you want to delete ALL domain names
+ *                          present in RDATA. Set to 0 otherwise. (See
+ *                          knot_rdata_deep_free().)
+ */
+void knot_rrset_deep_free(knot_rrset_t **rrset, int free_owner,
+                            int free_rdata, int free_rdata_dnames);
+
+/*!
+ * \brief Merges two RRSets.
+ *
+ * Merges \a r1 into \a r2 by concatenating the list of RDATAs in \a r2 after
+ * the list of RDATAs in \a r1. \a r2 is unaffected by this, though you must not
+ * destroy the RDATAs in \a r2 as they are now also in \a r1. (You may use
+ * function knot_rrset_free() though, as it does not touch RDATAs).
+ *
+ * \note Member \a rrsigs is preserved from the first RRSet.
+ *
+ * \param r1 Pointer to RRSet to be merged into.
+ * \param r2 Poitner to RRSet to be merged.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG if the RRSets could not be merged, because their
+ *         Owner, Type, Class or TTL does not match.
+ */
+int knot_rrset_merge(void **r1, void **r2);
+
+#endif /* _KNOT_RRSET_H_ */
+
+/*! @} */
diff --git a/src/libknot/tsig-op.c b/src/libknot/tsig-op.c
new file mode 100644
index 0000000..3178a23
--- /dev/null
+++ b/src/libknot/tsig-op.c
@@ -0,0 +1,1089 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <openssl/hmac.h>
+#include <openssl/evp.h>
+#include <time.h>
+#include <ctype.h>
+
+#include "common.h"
+#include "tsig.h"
+#include "tsig-op.h"
+#include "util/wire.h"
+#include "util/error.h"
+#include "util/debug.h"
+
+
+static const char Base64[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char Pad64 = '=';
+
+
+static int b64rmap_initialized = 0;
+static uint8_t b64rmap[256];
+
+static const uint8_t b64rmap_special = 0xf0;
+static const uint8_t b64rmap_end = 0xfd;
+static const uint8_t b64rmap_space = 0xfe;
+static const uint8_t b64rmap_invalid = 0xff;
+
+/**
+ * Initializing the reverse map is not thread safe.
+ * Which is fine for NSD. For now...
+ **/
+void b64_initialize_rmap()
+{
+	int i;
+	char ch;
+
+	/* Null: end of string, stop parsing */
+	b64rmap[0] = b64rmap_end;
+
+	for (i = 1; i < 256; ++i) {
+		ch = (char)i;
+		/* Whitespaces */
+		if (isspace(ch)) {
+			b64rmap[i] = b64rmap_space;
+		}
+		/* Padding: stop parsing */
+		else if (ch == Pad64) {
+			b64rmap[i] = b64rmap_end;
+		}
+		/* Non-base64 char */
+		else {
+			b64rmap[i] = b64rmap_invalid;
+		}
+	}
+
+	/* Fill reverse mapping for base64 chars */
+	for (i = 0; Base64[i] != '\0'; ++i) {
+		b64rmap[(uint8_t)Base64[i]] = i;
+	}
+
+	b64rmap_initialized = 1;
+}
+
+int b64_pton_do(char const *src, uint8_t *target, size_t targsize)
+{
+	int tarindex, state, ch;
+	uint8_t ofs;
+
+	state = 0;
+	tarindex = 0;
+
+	while (1) {
+		ch = *src++;
+		ofs = b64rmap[ch];
+
+		if (ofs >= b64rmap_special) {
+			/* Ignore whitespaces */
+			if (ofs == b64rmap_space) {
+				continue;
+			}
+			/* End of base64 characters */
+			if (ofs == b64rmap_end) {
+				break;
+			}
+			/* A non-base64 character. */
+			return (-1);
+		}
+
+		switch (state) {
+		case 0:
+			if ((size_t)tarindex >= targsize) {
+				return (-1);
+			}
+			target[tarindex] = ofs << 2;
+			state = 1;
+			break;
+		case 1:
+			if ((size_t)tarindex + 1 >= targsize) {
+				return (-1);
+			}
+			target[tarindex]   |=  ofs >> 4;
+			target[tarindex+1]  = (ofs & 0x0f)
+					      << 4 ;
+			tarindex++;
+			state = 2;
+			break;
+		case 2:
+			if ((size_t)tarindex + 1 >= targsize) {
+				return (-1);
+			}
+			target[tarindex]   |=  ofs >> 2;
+			target[tarindex+1]  = (ofs & 0x03)
+					      << 6;
+			tarindex++;
+			state = 3;
+			break;
+		case 3:
+			if ((size_t)tarindex >= targsize) {
+				return (-1);
+			}
+			target[tarindex] |= ofs;
+			tarindex++;
+			state = 0;
+			break;
+		default:
+			abort();
+		}
+	}
+
+	/*
+	 * We are done decoding Base-64 chars.  Let's see if we ended
+	 * on a byte boundary, and/or with erroneous trailing characters.
+	 */
+
+	if (ch == Pad64) {		/* We got a pad char. */
+		ch = *src++;		/* Skip it, get next. */
+		switch (state) {
+		case 0:		/* Invalid = in first position */
+		case 1:		/* Invalid = in second position */
+			return (-1);
+
+		case 2:		/* Valid, means one byte of info */
+			/* Skip any number of spaces. */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					break;
+				}
+			/* Make sure there is another trailing = sign. */
+			if (ch != Pad64) {
+				return (-1);
+			}
+			ch = *src++;		/* Skip the = */
+			/* Fall through to "single trailing =" case. */
+			/* FALLTHROUGH */
+
+		case 3:		/* Valid, means two bytes of info */
+			/*
+			 * We know this char is an =.  Is there anything but
+			 * whitespace after it?
+			 */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					return (-1);
+				}
+
+			/*
+			 * Now make sure for cases 2 and 3 that the "extra"
+			 * bits that slopped past the last full byte were
+			 * zeros.  If we don't check them, they become a
+			 * subliminal channel.
+			 */
+			if (target[tarindex] != 0) {
+				return (-1);
+			}
+		}
+	} else {
+		/*
+		 * We ended by seeing the end of the string.  Make sure we
+		 * have no partial bytes lying around.
+		 */
+		if (state != 0) {
+			return (-1);
+		}
+	}
+
+	return (tarindex);
+}
+
+
+int b64_pton_len(char const *src)
+{
+	int tarindex, state, ch;
+	uint8_t ofs;
+
+	state = 0;
+	tarindex = 0;
+
+	while (1) {
+		ch = *src++;
+		ofs = b64rmap[ch];
+
+		if (ofs >= b64rmap_special) {
+			/* Ignore whitespaces */
+			if (ofs == b64rmap_space) {
+				continue;
+			}
+			/* End of base64 characters */
+			if (ofs == b64rmap_end) {
+				break;
+			}
+			/* A non-base64 character. */
+			return (-1);
+		}
+
+		switch (state) {
+		case 0:
+			state = 1;
+			break;
+		case 1:
+			tarindex++;
+			state = 2;
+			break;
+		case 2:
+			tarindex++;
+			state = 3;
+			break;
+		case 3:
+			tarindex++;
+			state = 0;
+			break;
+		default:
+			abort();
+		}
+	}
+
+	/*
+	 * We are done decoding Base-64 chars.  Let's see if we ended
+	 * on a byte boundary, and/or with erroneous trailing characters.
+	 */
+
+	if (ch == Pad64) {		/* We got a pad char. */
+		ch = *src++;		/* Skip it, get next. */
+		switch (state) {
+		case 0:		/* Invalid = in first position */
+		case 1:		/* Invalid = in second position */
+			return (-1);
+
+		case 2:		/* Valid, means one byte of info */
+			/* Skip any number of spaces. */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					break;
+				}
+			/* Make sure there is another trailing = sign. */
+			if (ch != Pad64) {
+				return (-1);
+			}
+			ch = *src++;		/* Skip the = */
+			/* Fall through to "single trailing =" case. */
+			/* FALLTHROUGH */
+
+		case 3:		/* Valid, means two bytes of info */
+			/*
+			 * We know this char is an =.  Is there anything but
+			 * whitespace after it?
+			 */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					return (-1);
+				}
+
+		}
+	} else {
+		/*
+		 * We ended by seeing the end of the string.  Make sure we
+		 * have no partial bytes lying around.
+		 */
+		if (state != 0) {
+			return (-1);
+		}
+	}
+
+	return (tarindex);
+}
+
+int b64_pton(char const *src, uint8_t *target, size_t targsize)
+{
+	if (!b64rmap_initialized) {
+		b64_initialize_rmap();
+	}
+
+	if (target) {
+		return b64_pton_do(src, target, targsize);
+	} else {
+		return b64_pton_len(src);
+	}
+}
+
+#define	B64BUFSIZE	65535	/*!< Buffer size for b64 conversion. */
+
+
+
+
+
+
+
+
+
+
+
+
+const int KNOT_TSIG_MAX_DIGEST_SIZE = 64;    // size of HMAC-SHA512 digest
+
+
+static int knot_tsig_check_algorithm(const knot_rrset_t *tsig_rr)
+{
+	const knot_dname_t *alg_name = tsig_rdata_alg_name(tsig_rr);
+	if (!alg_name) {
+		return KNOT_EMALF;
+	}
+
+	tsig_algorithm_t alg = tsig_alg_from_name(alg_name);
+	if (alg == 0) {
+		/*!< \todo is this error OK? */
+		dbg_tsig("TSIG: unknown algorithm.\n");
+		return KNOT_TSIG_EBADSIG;
+	}
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_check_key(const knot_rrset_t *tsig_rr,
+                               const knot_key_t *tsig_key)
+{
+	const knot_dname_t *tsig_name = knot_rrset_owner(tsig_rr);
+	if (!tsig_name) {
+		return KNOT_EMALF;
+	}
+
+	const char *name = knot_dname_to_str(tsig_name);
+	if (!name) {
+		return KNOT_EMALF;
+	}
+
+	if (knot_dname_compare(tsig_name, tsig_key->name) != 0) {
+		/*!< \todo which error. */
+		dbg_tsig("TSIG: unknown key: %s\n", name);
+		return KNOT_TSIG_EBADKEY;
+	}
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_compute_digest(const uint8_t *wire, size_t wire_len,
+                                    uint8_t *digest, size_t *digest_len,
+                                    const knot_key_t *key)
+{
+	if (!wire || !digest || !digest_len || !key) {
+		dbg_tsig("TSIG: digest: bad args.\n");
+		return KNOT_EBADARG;
+	}
+
+	if (!key->name) {
+		dbg_tsig("TSIG: digest: no algorithm\n");
+		return KNOT_EMALF;
+	}
+
+	tsig_algorithm_t tsig_alg = key->algorithm;
+	if (tsig_alg == 0) {
+		dbg_tsig("TSIG: digest: unknown algorithm\n");
+		return KNOT_TSIG_EBADSIG;
+	}
+
+	/* Create digest, using length of the algorithm. */
+//	*digest = malloc(sizeof(uint8_t) * tsig_alg_digest_length(tsig_alg));
+//	if (!digest) {
+//		ERR_ALLOC_FAILED;
+//		return KNOT_ENOMEM;
+//	}
+
+	/* Decode key from Base64. */
+	char decoded_key[B64BUFSIZE];
+
+	int decoded_key_size = b64_pton(key->secret, (uint8_t *)decoded_key,
+					B64BUFSIZE);
+	if (decoded_key_size < 0) {
+		dbg_tsig("TSIG: Could not decode Base64\n");
+		return KNOT_EMALF;
+	}
+
+	dbg_tsig("TSIG: decoded key size: %d\n", decoded_key_size);
+	dbg_tsig("TSIG: decoded key: '%*s'\n", decoded_key_size, decoded_key);
+
+	dbg_tsig("TSIG: using this wire for digest calculation\n");
+
+	//dbg_tsig_hex(wire, wire_len);
+
+	/* Compute digest. */
+	HMAC_CTX ctx;
+
+	switch (tsig_alg) {
+		case KNOT_TSIG_ALG_HMAC_MD5:
+			HMAC_Init(&ctx, decoded_key,
+			          decoded_key_size, EVP_md5());
+			break;
+		default:
+			return KNOT_ENOTSUP;
+	} /* switch */
+
+	unsigned tmp_dig_len = *digest_len;
+	HMAC_Update(&ctx, (const unsigned char *)wire, wire_len);
+	HMAC_Final(&ctx, digest, &tmp_dig_len);
+	*digest_len = tmp_dig_len;
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_check_time_signed(const knot_rrset_t *tsig_rr)
+{
+	if (!tsig_rr) {
+		return KNOT_EBADARG;
+	}
+
+	/* Get the time signed and fudge values. */
+	uint64_t time_signed = tsig_rdata_time_signed(tsig_rr);
+	if (time_signed == 0) {
+		return KNOT_TSIG_EBADTIME;
+	}
+	uint16_t fudge = tsig_rdata_fudge(tsig_rr);
+	if (fudge == 0) {
+		return KNOT_TSIG_EBADTIME;
+	}
+
+	/* Get the current time. */
+	time_t curr_time = time(NULL);
+
+	/*!< \todo bleeding eyes. */
+	if (difftime(curr_time, (time_t)time_signed) > fudge) {
+		return KNOT_TSIG_EBADTIME;
+	}
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_write_tsig_timers(uint8_t *wire, 
+                                       const knot_rrset_t *tsig_rr)
+{
+	// put time signed
+	knot_wire_write_u48(wire, tsig_rdata_time_signed(tsig_rr));
+	
+	// put fudge
+	knot_wire_write_u16(wire + 6, tsig_rdata_fudge(tsig_rr));
+	
+	return KNOT_EOK;
+}
+
+static int knot_tsig_write_tsig_variables(uint8_t *wire,
+                                         const knot_rrset_t *tsig_rr)
+{
+	/* Copy TSIG variables - starting with key name. */
+	const knot_dname_t *tsig_owner = knot_rrset_owner(tsig_rr);
+	if (!tsig_owner) {
+		dbg_tsig("TSIG: write variables: no owner.\n");
+		return KNOT_EBADARG;
+	}
+
+	int offset = 0;
+
+	memcpy(wire + offset, knot_dname_name(tsig_owner),
+	       sizeof(uint8_t) * knot_dname_size(tsig_owner));
+	dbg_tsig("TSIG: write variables: written owner (tsig alg): \n");
+	         /*knot_rrset_class(tsig_rr));*/
+	dbg_tsig_hex_detail(wire + offset, knot_dname_size(tsig_owner));
+	offset += knot_dname_size(tsig_owner);
+
+	/*!< \todo which order? */
+
+	/* Copy class. */
+	knot_wire_write_u16(wire + offset, knot_rrset_class(tsig_rr));
+	dbg_tsig("TSIG: write variables: written CLASS: %u - ",
+	         knot_rrset_class(tsig_rr));
+	dbg_tsig_hex_detail(wire + offset, sizeof(uint16_t));
+	offset += sizeof(uint16_t);
+
+	/* Copy TTL - always 0. */
+	knot_wire_write_u32(wire + offset, knot_rrset_ttl(tsig_rr));
+	dbg_tsig("TSIG: write variables: written TTL: %u - ",
+	         knot_rrset_ttl(tsig_rr));
+	dbg_tsig_hex_detail(wire + offset, sizeof(uint32_t));
+	offset += sizeof(uint32_t);
+
+	/* Copy alg name. */
+	const knot_dname_t *alg_name = tsig_rdata_alg_name(tsig_rr);
+	if (!alg_name) {
+		dbg_tsig("TSIG: write variables: no algorithm name.\n");
+		return KNOT_EBADARG;
+	}
+//	alg_name = knot_dname_new_from_str("HMAC-MD5.SIG-ALG.REG.INT.",
+					   //strlen("HMAC-MD5.SIG-ALG.REG.INT."),
+					   //NULL);
+
+	memcpy(wire + offset, knot_dname_name(alg_name),
+	       sizeof(uint8_t) * knot_dname_size(alg_name));
+	offset += knot_dname_size(alg_name);
+	dbg_tsig_detail("TSIG: write variables: written alg name: %s\n",
+		 knot_dname_to_str(alg_name));
+
+	/* Following data are written in network order. */
+	/* Time signed. */
+	knot_wire_write_u48(wire + offset, tsig_rdata_time_signed(tsig_rr));
+	offset += 6;
+	dbg_tsig_detail("TSIG: write variables: time signed: %llu - ",
+		        tsig_rdata_time_signed(tsig_rr));
+	dbg_tsig_hex_detail(wire + offset - 6, 6);
+	/* Fudge. */
+	knot_wire_write_u16(wire + offset, tsig_rdata_fudge(tsig_rr));
+	offset += sizeof(uint16_t);
+	dbg_tsig_detail("TSIG: write variables: fudge: %hu\n",
+		 tsig_rdata_fudge(tsig_rr));
+	/* TSIG error. */
+	knot_wire_write_u16(wire + offset, tsig_rdata_error(tsig_rr));
+	offset += sizeof(uint16_t);
+	/* Get other data length. */
+	uint16_t other_data_length = tsig_rdata_other_data_length(tsig_rr);
+	/* Get other data. */
+	const uint8_t *other_data = tsig_rdata_other_data(tsig_rr);
+	if (!other_data) {
+		dbg_tsig("TSIG: write variables: no other data.\n");
+		return KNOT_EBADARG;
+	}
+
+	/*
+	 * We cannot write the whole other_data, as it contains its length in
+	 * machine order.
+	 */
+	knot_wire_write_u16(wire + offset, other_data_length);
+	offset += sizeof(uint16_t);
+
+	/* Skip the length. */
+	dbg_tsig_detail("Copying other data.\n");
+	memcpy(wire + offset, other_data, other_data_length);
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_wire_write_timers(uint8_t *wire,
+                                       const knot_rrset_t *tsig_rr)
+{
+	knot_wire_write_u48(wire, tsig_rdata_time_signed(tsig_rr));
+	knot_wire_write_u16(wire + 6, tsig_rdata_fudge(tsig_rr));
+
+	return KNOT_EOK;
+}
+
+int knot_tsig_create_sign_wire(const uint8_t *msg, size_t msg_len,
+				      /*size_t msg_max_len, */const uint8_t *request_mac,
+		                      size_t request_mac_len,
+		                      uint8_t *digest, size_t *digest_len,
+				      const knot_rrset_t *tmp_tsig,
+		                      const knot_key_t *key)
+{
+	if (!msg || !key || digest_len == NULL) {
+		dbg_tsig("TSIG: create wire: bad args.\n");
+		return KNOT_EBADARG;
+	}
+
+	/* Create tmp TSIG. */
+	int ret = KNOT_EOK;
+//	knot_rrset_t *tmp_tsig =
+//		knot_rrset_new(key->name, KNOT_RRTYPE_TSIG, KNOT_CLASS_ANY, 0);
+//	if (!tmp_tsig) {
+//		return KNOT_ENOMEM;
+//	}
+
+//	tsig_rdata_store_current_time(tmp_tsig);
+
+	/*
+	 * Create tmp wire, it should contain message
+	 * plus request mac plus tsig varibles.
+	 */
+	dbg_tsig("Counting wire size: %zu, %zu, %zu.\n",
+	         msg_len, request_mac_len,
+	         tsig_rdata_tsig_variables_length(tmp_tsig));
+	size_t wire_len = sizeof(uint8_t) *
+			(msg_len + request_mac_len + ((request_mac_len > 0)
+			 ? 2 : 0) +
+			tsig_rdata_tsig_variables_length(tmp_tsig));
+	uint8_t *wire = malloc(wire_len);
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	memset(wire, 0, wire_len);
+
+	uint8_t *pos = wire;
+
+	/* Copy the request MAC - should work even if NULL. */
+	if (request_mac_len > 0) {
+		dbg_tsig_detail("Copying request MAC size\n");
+		knot_wire_write_u16(pos, request_mac_len);
+		pos += 2;
+	}
+	dbg_tsig("Copying request mac.\n");
+	memcpy(pos, request_mac, sizeof(uint8_t) * request_mac_len);
+	dbg_tsig_detail("TSIG: create wire: request mac: ");
+	dbg_tsig_hex_detail(pos, request_mac_len);
+	pos += request_mac_len;
+	/* Copy the original message. */
+	dbg_tsig("Copying original message.\n");
+	memcpy(pos, msg, msg_len);
+	dbg_tsig_detail("TSIG: create wire: original message: \n");
+	//dbg_tsig_hex_detail(pos, msg_len);
+	pos += msg_len;
+	/* Copy TSIG variables. */
+	dbg_tsig("Writing TSIG variables.\n");
+	ret = knot_tsig_write_tsig_variables(pos, tmp_tsig);
+	if (ret != KNOT_EOK) {
+		dbg_tsig("TSIG: create wire: failed to write TSIG "
+		         "variables: %s\n", knot_strerror(ret));
+		return ret;
+	}
+
+	/* Compute digest. */
+	ret = knot_tsig_compute_digest(wire, wire_len,
+	                               digest, digest_len, key);
+	if (ret != KNOT_EOK) {
+		dbg_tsig("TSIG: create wire: failed to compute digest: %s\n",
+		         knot_strerror(ret));
+		*digest_len = 0;
+		return ret;
+	}
+
+//	assert(digest_tmp_len > 0);
+	free(wire);
+
+//	if (digest_tmp_len > *digest_len) {
+//		*digest_len = 0;
+//		return KNOT_ESPACE;
+//	}
+
+//	knot_rrset_deep_free(&tmp_tsig, 1, 1, 1);
+
+	// everything went ok, save the digest to the output parameter
+//	memcpy(digest, digest_tmp, digest_tmp_len);
+//	*digest_len = digest_tmp_len;
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_create_sign_wire_next(const uint8_t *msg, size_t msg_len,
+				      const uint8_t *prev_mac,
+		                      size_t prev_mac_len,
+		                      uint8_t *digest, size_t *digest_len,
+				      const knot_rrset_t *tmp_tsig,
+		                      const knot_key_t *key)
+{
+	if (!msg || !key || digest_len == NULL) {
+		dbg_tsig("TSIG: create wire: bad args.\n");
+		return KNOT_EBADARG;
+	}
+
+	/* Create tmp TSIG. */
+	int ret = KNOT_EOK;
+
+	/*
+	 * Create tmp wire, it should contain message
+	 * plus request mac plus tsig varibles.
+	 */
+	dbg_tsig("Counting wire size: %zu, %zu, %zu.\n",
+	         msg_len, prev_mac_len,
+	         tsig_rdata_tsig_timers_length());
+	size_t wire_len = sizeof(uint8_t) *
+	                (msg_len + prev_mac_len +
+			tsig_rdata_tsig_timers_length());
+	uint8_t *wire = malloc(wire_len);
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	memset(wire, 0, wire_len);
+
+	/* Copy the request MAC - should work even if NULL. */
+	dbg_tsig("Copying request mac.\n");
+	memcpy(wire, prev_mac, sizeof(uint8_t) * prev_mac_len);
+	dbg_tsig_detail("TSIG: create wire: request mac: ");
+	dbg_tsig_hex_detail(wire, prev_mac_len);
+	/* Copy the original message. */
+	dbg_tsig("Copying original message.\n");
+	memcpy(wire + prev_mac_len, msg, msg_len);
+	dbg_tsig_detail("TSIG: create wire: original message: \n");
+	//dbg_tsig_hex_detail(wire + prev_mac_len, msg_len);
+	/* Copy TSIG variables. */
+	
+	dbg_tsig("Writing TSIG timers.\n");
+	ret = knot_tsig_write_tsig_timers(wire + prev_mac_len + msg_len, 
+	                                  tmp_tsig);
+//	ret = knot_tsig_write_tsig_variables(wire + prev_mac_len + msg_len,
+//	                                     tmp_tsig);
+	if (ret != KNOT_EOK) {
+		dbg_tsig("TSIG: create wire: failed to write TSIG "
+		         "timers: %s\n", knot_strerror(ret));
+		return ret;
+	}
+
+	/* Compute digest. */
+	ret = knot_tsig_compute_digest(wire, wire_len,
+	                               digest, digest_len, key);
+	if (ret != KNOT_EOK) {
+		dbg_tsig("TSIG: create wire: failed to compute digest: %s\n",
+		         knot_strerror(ret));
+		*digest_len = 0;
+		return ret;
+	}
+
+	free(wire);
+
+	return KNOT_EOK;
+}
+
+int knot_tsig_sign(uint8_t *msg, size_t *msg_len,
+                   size_t msg_max_len, const uint8_t *request_mac,
+                   size_t request_mac_len,
+                   uint8_t *digest, size_t *digest_len,
+                   const knot_key_t *key)
+{
+	if (!msg || !msg_len || !key || digest == NULL || digest_len == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_dname_t *key_name_copy = knot_dname_deep_copy(key->name);
+	if (!key_name_copy) {
+		dbg_tsig_detail("TSIG: key_name_copy = NULL\n");
+		return KNOT_ENOMEM;
+	}
+
+	knot_rrset_t *tmp_tsig =
+		knot_rrset_new(key_name_copy,
+			       KNOT_RRTYPE_TSIG, KNOT_CLASS_ANY, 0);
+	if (!tmp_tsig) {
+		dbg_tsig_detail("TSIG: tmp_tsig = NULL\n");
+		return KNOT_ENOMEM;
+	}
+
+	/* Create rdata for TSIG RR. */
+	knot_rdata_t *rdata = knot_rdata_new();
+	if (!rdata) {
+		dbg_tsig_detail("TSIG: rdata = NULL\n");
+		return KNOT_ENOMEM;
+	}
+
+	knot_rrset_add_rdata(tmp_tsig, rdata);
+
+	/* Create items for TSIG RR. */
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(KNOT_RRTYPE_TSIG);
+	assert(desc);
+
+	knot_rdata_item_t *items =
+		malloc(sizeof(knot_rdata_item_t) * desc->length);
+	if (!items) {
+		dbg_tsig_detail("TSIG: items = NULL\n");
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	memset(items, 0, sizeof(knot_rdata_item_t) * desc->length);
+
+	int ret = knot_rdata_set_items(rdata, items, desc->length);
+	if (ret != KNOT_EOK) {
+		dbg_tsig_detail("TSIG: rdata_set_items returned %s\n", knot_strerror(ret));
+		return ret;
+	}
+	free(items);
+
+	tsig_rdata_set_alg(tmp_tsig, key->algorithm);
+	tsig_rdata_store_current_time(tmp_tsig);
+	tsig_rdata_set_fudge(tmp_tsig, 300);
+
+	/* Set original ID */
+	tsig_rdata_set_orig_id(tmp_tsig, knot_wire_get_id(msg));
+
+	/* Set error */
+	/*! \todo [TSIG] Set error and other data if appropriate. */
+	tsig_rdata_set_tsig_error(tmp_tsig, 0);
+
+	/* Set other len. */
+	tsig_rdata_set_other_data(tmp_tsig, 0, 0);
+
+	uint8_t digest_tmp[KNOT_TSIG_MAX_DIGEST_SIZE];
+	size_t digest_tmp_len = 0;
+
+	dbg_tsig_detail("tmp_tsig before sign_wire():\n");
+	knot_rrset_dump(tmp_tsig, 0);
+
+	ret = knot_tsig_create_sign_wire(msg, *msg_len, /*msg_max_len,*/
+	                                     request_mac, request_mac_len,
+	                                     digest_tmp, &digest_tmp_len,
+					     tmp_tsig, key);
+	if (ret != KNOT_EOK) {
+		dbg_tsig("TSIG: could not create wire or sign wire: %s\n",
+		         knot_strerror(ret));
+		return ret;
+	}
+
+	/* Set the digest. */
+	size_t tsig_wire_len = msg_max_len - *msg_len;
+	int rr_count = 0;
+	tsig_rdata_set_mac(tmp_tsig, digest_tmp_len, digest_tmp);
+
+	//knot_rrset_dump(tmp_tsig, 1);
+
+	/* Write RRSet to wire */
+	ret = knot_rrset_to_wire(tmp_tsig, msg + *msg_len,
+	                         &tsig_wire_len, &rr_count);
+	if (ret != KNOT_EOK) {
+		dbg_tsig_detail("TSIG: rrset_to_wire = %s\n", knot_strerror(ret));
+		*digest_len = 0;
+		return ret;
+	}
+
+	knot_rrset_deep_free(&tmp_tsig, 1, 1, 1);
+
+	*msg_len += tsig_wire_len;
+
+	uint16_t arcount = knot_wire_get_arcount(msg);
+	knot_wire_set_arcount(msg, ++arcount);
+	
+	// everything went ok, save the digest to the output parameter
+	memcpy(digest, digest_tmp, digest_tmp_len);
+	*digest_len = digest_tmp_len;
+
+	return KNOT_EOK;
+}
+
+int knot_tsig_sign_next(uint8_t *msg, size_t *msg_len, size_t msg_max_len,
+                        const uint8_t *prev_digest, size_t prev_digest_len,
+                        uint8_t *digest, size_t *digest_len,
+                        const knot_key_t *key)
+{
+	if (!msg || !msg_len || !key || !key || !digest || !digest_len) {
+		return KNOT_EBADARG;
+	}
+	
+	uint8_t digest_tmp[KNOT_TSIG_MAX_DIGEST_SIZE];
+	size_t digest_tmp_len = 0;
+
+	/* Create tmp TSIG. */
+	knot_rrset_t *tmp_tsig =
+		knot_rrset_new(key->name, KNOT_RRTYPE_TSIG, KNOT_CLASS_ANY, 0);
+	if (!tmp_tsig) {
+		return KNOT_ENOMEM;
+	}
+
+	tsig_rdata_store_current_time(tmp_tsig);
+
+	/* Create wire to be signed. */
+	size_t wire_len = prev_digest_len + *msg_len + KNOT_TSIG_TIMERS_LENGTH;
+	uint8_t *wire = malloc(wire_len);
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+	memset(wire, 0, wire_len);
+
+	/* Write previous digest. */
+	memcpy(wire, prev_digest, sizeof(uint8_t) * prev_digest_len);
+	/* Write original message. */
+	memcpy(msg + prev_digest_len, msg, *msg_len);
+	/* Write timers. */
+	knot_tsig_wire_write_timers(msg + prev_digest_len + *msg_len, tmp_tsig);
+
+	int ret = 0;
+	ret = knot_tsig_compute_digest(wire, wire_len,
+	                               digest_tmp, &digest_tmp_len, key);
+	if (ret != KNOT_EOK) {
+		*digest_len = 0;
+		return ret;
+	}
+	
+	if (digest_tmp_len > *digest_len) {
+		*digest_len = 0;
+		return KNOT_ESPACE;
+	}
+
+	free(wire);
+
+	/* Set the MAC. */
+	tsig_rdata_set_mac(tmp_tsig, *digest_len, digest);
+
+	size_t tsig_wire_size = msg_max_len - *msg_len;
+	int rr_count = 0;
+	ret = knot_rrset_to_wire(tmp_tsig, msg + *msg_len,
+	                         &tsig_wire_size, &rr_count);
+	if (ret != KNOT_EOK) {
+		*digest_len = 0;
+		return ret;
+	}
+
+	knot_rrset_deep_free(&tmp_tsig, 1, 1, 1);
+
+	*msg_len += tsig_wire_size;
+	uint16_t arcount = knot_wire_get_arcount(msg);
+	knot_wire_set_arcount(msg, ++arcount);
+	
+	memcpy(digest, digest_tmp, digest_tmp_len);
+	*digest_len = digest_tmp_len;
+
+	return KNOT_EOK;
+}
+
+static int knot_tsig_check_digest(const knot_rrset_t *tsig_rr,
+                                  const uint8_t *wire, size_t size,
+                                  const uint8_t *request_mac,
+                                  size_t request_mac_len,
+                                  const knot_key_t *tsig_key,
+                                  int use_times)
+{
+	if (!tsig_rr || !wire || !tsig_key) {
+		return KNOT_EBADARG;
+	}
+
+	/* Check time signed. */
+	int ret = knot_tsig_check_time_signed(tsig_rr);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	dbg_tsig("TSIG: time checked.\n");
+
+	/* Check that libknot knows the algorithm. */
+	ret = knot_tsig_check_algorithm(tsig_rr);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	dbg_tsig("TSIG: algorithm checked.\n");
+
+	/* Check that key is valid, ie. the same as given in args. */
+	ret = knot_tsig_check_key(tsig_rr, tsig_key);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	dbg_tsig("TSIG: key validity checked.\n");
+
+	/* Time OK algorithm OK, key name OK - do digest. */
+	/* Calculate the size of TSIG RR. */
+	size_t tsig_len = tsig_wire_actsize(tsig_rr);
+
+	dbg_tsig_detail("TSIG: check digest: wire before strip: \n");
+	//dbg_tsig_hex_detail(wire, size);
+
+	/* Strip the TSIG. */
+	size -= tsig_len;
+
+	dbg_tsig_detail("TSIG: check digest: wire after strip (stripped %zu):\n",
+	                tsig_len);
+	//dbg_tsig_hex_detail(wire, size);
+
+	uint8_t *wire_to_sign = malloc(sizeof(uint8_t) * size);
+	if (!wire_to_sign) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	memset(wire_to_sign, 0, sizeof(uint8_t) * size);
+	memcpy(wire_to_sign, wire, size);
+
+	/* Decrease arcount. */
+	knot_wire_set_arcount(wire_to_sign,
+	                      knot_wire_get_arcount(wire_to_sign) - 1);
+
+	uint8_t digest_tmp[KNOT_TSIG_MAX_DIGEST_SIZE];
+	size_t digest_tmp_len = 0;
+	assert(tsig_rr->rdata);
+	
+	if (use_times) {
+		ret = knot_tsig_create_sign_wire_next(wire_to_sign, size, 
+		                                 request_mac, request_mac_len,
+		                                 digest_tmp, &digest_tmp_len, 
+		                                 tsig_rr, tsig_key);
+	} else {
+		ret = knot_tsig_create_sign_wire(wire_to_sign, size, 
+		                                 request_mac, request_mac_len,
+		                                 digest_tmp, &digest_tmp_len, 
+		                                 tsig_rr, tsig_key);
+	}
+
+	assert(tsig_rr->rdata);
+	free(wire_to_sign);
+
+	if (ret != KNOT_EOK) {
+		dbg_tsig("Failed to create wire format for checking: %s.\n",
+		         knot_strerror(ret));
+		return ret;
+	}
+
+//	uint8_t digest_tmp[KNOT_TSIG_MAX_DIGEST_SIZE];
+//	size_t digest_tmp_len = 0;
+//	ret = knot_tsig_compute_digest(wire, size, digest_tmp,
+//	                               &digest_tmp_len, tsig_key);
+//	if (ret != KNOT_EOK) {
+//		dbg_tsig("TSIG: digest could not be calculated\n");
+//		return ret;
+//	}
+
+	dbg_tsig("TSIG: digest calculated\n");
+
+	/* Compare MAC from TSIG RR RDATA with just computed digest. */
+
+	/*!< \todo move to function. */
+	const knot_dname_t *alg_name = tsig_rdata_alg_name(tsig_rr);
+	tsig_algorithm_t alg = tsig_alg_from_name(alg_name);
+
+	/*! \todo [TSIG] TRUNCATION */
+	uint16_t mac_length = tsig_rdata_mac_length(tsig_rr);
+	const uint8_t *tsig_mac = tsig_rdata_mac(tsig_rr);
+
+	if (mac_length != tsig_alg_digest_length(alg)) {
+		dbg_tsig("TSIG: calculated digest length and given length do not match!\n");
+		return KNOT_TSIG_EBADSIG;
+	}
+
+//	assert(tsig_alg_digest_length(alg) == mac_length);
+
+	dbg_tsig("TSIG: calc digest : ");
+	dbg_tsig_hex(digest_tmp, digest_tmp_len);
+
+	dbg_tsig("TSIG: given digest: ");
+	dbg_tsig_hex(tsig_mac, mac_length);
+
+	if (strncasecmp((char *)(tsig_mac), (char *)digest_tmp,
+	                mac_length) != 0) {
+		return KNOT_TSIG_EBADSIG;
+	}
+
+	return KNOT_EOK;
+}
+
+int knot_tsig_server_check(const knot_rrset_t *tsig_rr,
+                           const uint8_t *wire, size_t size,
+                           const knot_key_t *tsig_key)
+{
+	dbg_tsig_verb("tsig_server_check()\n");
+	return knot_tsig_check_digest(tsig_rr, wire, size, NULL, 0, tsig_key, 0);
+}
+
+int knot_tsig_client_check(const knot_rrset_t *tsig_rr,
+                           const uint8_t *wire, size_t size,
+                           const uint8_t *request_mac, size_t request_mac_len,
+                           const knot_key_t *tsig_key)
+{
+	dbg_tsig_verb("tsig_client_check()\n");
+	return knot_tsig_check_digest(tsig_rr, wire, size, request_mac,
+	                              request_mac_len, tsig_key, 0);
+}
+
+int knot_tsig_client_check_next(const knot_rrset_t *tsig_rr,
+                                const uint8_t *wire, size_t size,
+                                const uint8_t *prev_digest,
+                                size_t prev_digest_len,
+                                const knot_key_t *tsig_key)
+{
+//	return knot_tsig_client_check(tsig_rr, wire, size, prev_digest,
+//	                              prev_digest_len, tsig_key);
+	dbg_tsig_verb("tsig_client_check_next()\n");
+	return knot_tsig_check_digest(tsig_rr, wire, size, prev_digest,
+	                              prev_digest_len, tsig_key, 1);
+	return KNOT_ENOTSUP;
+}
diff --git a/src/libknot/tsig-op.h b/src/libknot/tsig-op.h
new file mode 100644
index 0000000..b206dc7
--- /dev/null
+++ b/src/libknot/tsig-op.h
@@ -0,0 +1,161 @@
+/*!
+ * \file tsig-op.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief TSIG signing and validating.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_TSIG_OP_H_
+#define _KNOT_TSIG_OP_H_
+
+#include <stdint.h>
+
+#include "tsig.h"
+#include "rrset.h"
+
+/*!
+ * \brief Generate TSIG signature of a message.
+ *
+ * This function generates TSIG digest of the given message prepended with the
+ * given Request MAC (if any) and appended with TSIG Variables. It also appends
+ * the resulting TSIG RR to the message wire format and accordingly adjusts
+ * the message size.
+ *
+ * \note This function does not save the new digest to the 'digest' parameter
+ *       unless everything went OK. This allows to sent the same buffer to
+ *       the 'request_mac' and 'digest' parameters.
+ *
+ * \param msg Message to be signed.
+ * \param msg_len Size of the message in bytes.
+ * \param msg_max_len Maximum size of the message in bytes.
+ * \param request_mac Request MAC. (may be NULL).
+ * \param request_mac_len Size of the request MAC in bytes.
+ * \param digest Buffer to save the digest in.
+ * \param digest_len In: size of the buffer. Out: real size of the digest saved.
+ * \param tsig_rr RRSet containing the TSIG RR to be used. Data from the RR are
+ *                appended to the signed message.
+ *
+ * \retval KNOT_EOK if everything went OK.
+ * \retval TODO
+ *
+ * \todo This function should return TSIG errors by their codes which are
+ *       positive values - this will be recognized by the caller.
+ */
+int knot_tsig_sign(uint8_t *msg, size_t *msg_len, size_t msg_max_len,
+                   const uint8_t *request_mac, size_t request_mac_len,
+                   uint8_t *digest, size_t *digest_len,
+                   const knot_key_t *key);
+
+/*!
+ * \brief Generate TSIG signature of a 2nd or later message in a TCP session.
+ *
+ * This function generates TSIG digest of the given message prepended with the
+ * given Request MAC (if any) and appended with TSIG Variables. It also appends
+ * the resulting TSIG RR to the message wire format and accordingly adjusts
+ * the message size.
+ *
+ * \note This function does not save the new digest to the 'digest' parameter
+ *       unless everything went OK. This allows to sent the same buffer to
+ *       the 'request_mac' and 'digest' parameters.
+ *
+ * \param msg Message to be signed.
+ * \param msg_len Size of the message in bytes.
+ * \param msg_max_len Maximum size of the message in bytes.
+ * \param prev_digest Previous digest sent by the server in the session.
+ * \param prev_digest_len Size of the previous digest in bytes.
+ * \param digest Buffer to save the digest in.
+ * \param digest_len In: size of the buffer. Out: real size of the digest saved.
+ * \param tsig_rr RRSet containing the TSIG RR to be used. Data from the RR are
+ *                appended to the signed message.
+ *
+ * \retval KNOT_EOK if successful.
+ * \retval TODO
+ *
+ * \todo This function should return TSIG errors by their codes which are
+ *       positive values - this will be recognized by the caller.
+ */
+int knot_tsig_sign_next(uint8_t *msg, size_t *msg_len, size_t msg_max_len,
+                        const uint8_t *prev_digest, size_t prev_digest_len,
+                        uint8_t *digest, size_t *digest_len,
+                        const knot_key_t *key);
+
+/*!
+ * \brief Checks incoming request.
+ *
+ * \param tsig_rr TSIG extracted from the packet.
+ * \param wire Wire format of the packet (including the TSIG RR).
+ * \param size Size of the wire format of packet in bytes.
+ *
+ * \retval KNOT_EOK If the signature is valid.
+ * \retval TODO
+ *
+ * \todo This function should return TSIG errors by their codes which are
+ *       positive values - this will be recognized by the caller.
+ */
+int knot_tsig_server_check(const knot_rrset_t *tsig_rr,
+                           const uint8_t *wire, size_t size,
+                           const knot_key_t *tsig_key);
+
+/*!
+ * \brief Checks incoming response.
+ *
+ * \param tsig_rr TSIG extracted from the packet.
+ * \param wire Wire format of the packet (including the TSIG RR).
+ * \param size Size of the wire format of packet in bytes.
+ * \param request_mac Request MAC. (may be NULL).
+ * \param request_mac_len Size of the request MAC in bytes.
+ *
+ * \retval KNOT_EOK If the signature is valid.
+ * \retval TODO
+ *
+ * \todo This function should return TSIG errors by their codes which are
+ *       positive values - this will be recognized by the caller.
+ */
+int knot_tsig_client_check(const knot_rrset_t *tsig_rr,
+                           const uint8_t *wire, size_t size,
+                           const uint8_t *request_mac, size_t request_mac_len,
+                           const knot_key_t *key);
+
+/*!
+ * \brief Checks signature of 2nd or next packet in a TCP session.
+ *
+ * \param tsig_rr TSIG extracted from the packet.
+ * \param wire Wire format of the packet (including the TSIG RR).
+ * \param size Size of the wire format of packet in bytes.
+ * \param prev_digest Previous digest sent by the server in the session.
+ * \param prev_digest_len Size of the previous digest in bytes.
+ *
+ * \retval KNOT_EOK If the signature is valid.
+ * \retval TODO
+ *
+ * \todo This function should return TSIG errors by their codes which are
+ *       positive values - this will be recognized by the caller.
+ */
+int knot_tsig_client_check_next(const knot_rrset_t *tsig_rr,
+                                const uint8_t *wire, size_t size,
+                                const uint8_t *prev_digest,
+                                size_t prev_digest_len,
+                                const knot_key_t *key);
+
+#endif /* _KNOT_TSIG_H_ */
+
+/*! @} */
diff --git a/src/libknot/tsig.c b/src/libknot/tsig.c
new file mode 100644
index 0000000..432539f
--- /dev/null
+++ b/src/libknot/tsig.c
@@ -0,0 +1,618 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <assert.h>
+#include <time.h>
+
+#include "tsig.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "common.h"
+#include "util/utils.h"
+#include "rrset.h"
+#include "rdata.h"
+#include "dname.h"
+
+/*! \brief TSIG algorithms table. */
+#define TSIG_ALG_TABLE_SIZE 8
+static knot_lookup_table_t tsig_alg_table[TSIG_ALG_TABLE_SIZE] = {
+	{ KNOT_TSIG_ALG_GSS_TSIG, "gss-tsig." },
+	{ KNOT_TSIG_ALG_HMAC_MD5, "hmac-md5.sig-alg.reg.int." },
+	{ KNOT_TSIG_ALG_HMAC_SHA1, "hmac-sha1." },
+	{ KNOT_TSIG_ALG_HMAC_SHA224, "hmac-sha224." },
+	{ KNOT_TSIG_ALG_HMAC_SHA256, "hmac-sha256." },
+	{ KNOT_TSIG_ALG_HMAC_SHA384, "hmac-sha384." },
+	{ KNOT_TSIG_ALG_HMAC_SHA512, "hmac-sha512." },
+	{ KNOT_TSIG_ALG_NULL, NULL }
+};
+
+int tsig_rdata_init(knot_rrset_t *tsig)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	/* Initializes rdata. */
+	tsig->rdata = knot_rdata_new();
+	if (!tsig->rdata) {
+		return KNOT_ENOMEM;
+	}
+
+	tsig->rdata->items =
+		malloc(sizeof(knot_rdata_item_t) * KNOT_TSIG_ITEM_COUNT);
+	if (!tsig->rdata->items) {
+		return KNOT_ENOMEM;
+	}
+
+	memset(tsig->rdata->items, 0,
+	       sizeof(knot_rdata_item_t) * KNOT_TSIG_ITEM_COUNT);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_alg_name(knot_rrset_t *tsig, knot_dname_t *alg_name)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 1);
+
+	knot_dname_t *alg_name_copy = knot_dname_deep_copy(alg_name);
+	if (!alg_name_copy) {
+		return KNOT_ENOMEM;
+	}
+
+	knot_rdata_item_set_dname(rdata, 0, alg_name_copy);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_alg(knot_rrset_t *tsig, tsig_algorithm_t alg)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 1);
+
+	const char *alg_str = tsig_alg_to_str(alg);
+	knot_dname_t *alg_name_copy = knot_dname_new_from_str(alg_str,
+							      strlen(alg_str),
+							      0);
+	if (!alg_name_copy) {
+		return KNOT_ENOMEM;
+	}
+
+	knot_rdata_item_set_dname(rdata, 0, alg_name_copy);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_time_signed(knot_rrset_t *tsig, uint64_t time)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 2);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * 6 + sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length - 6. */
+	wire[0] = 6;
+	knot_wire_write_u48((uint8_t *)(wire + 1), time);
+
+	knot_rdata_item_set_raw_data(rdata, 1, wire);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_fudge(knot_rrset_t *tsig, uint16_t fudge)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 3);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * 2 + sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length - 2. */
+	wire[0] = sizeof(uint16_t);
+	knot_wire_write_u16((uint8_t *)(wire + 1), fudge);
+
+	knot_rdata_item_set_raw_data(rdata, 2, wire);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_mac(knot_rrset_t *tsig, uint16_t length, const uint8_t *mac)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 4);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * length + 2 * sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length. */
+	wire[0] = length + sizeof(uint16_t);
+	knot_wire_write_u16((uint8_t *)(wire + 1), length);
+	/* Copy the actual MAC. */
+	memcpy((uint8_t *)(wire + 2), mac, sizeof(uint8_t) * length);
+	knot_rdata_item_set_raw_data(rdata, 3, wire);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_orig_id(knot_rrset_t *tsig, uint16_t id)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 5);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * 2 + sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length - 2. */
+	wire[0] = sizeof(uint16_t);
+	knot_wire_write_u16((uint8_t *)(wire + 1), id);
+
+	knot_rdata_item_set_raw_data(rdata, 4, wire);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_tsig_error(knot_rrset_t *tsig, uint16_t tsig_error)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 6);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * 2 + sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length - 2. */
+	wire[0] = sizeof(uint16_t);
+	knot_wire_write_u16((uint8_t *)(wire + 1), tsig_error);
+
+	knot_rdata_item_set_raw_data(rdata, 5, wire);
+
+	return KNOT_EOK;
+}
+
+int tsig_rdata_set_other_data(knot_rrset_t *tsig, uint16_t length,
+                              const uint8_t *other_data)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+
+	knot_rdata_t *rdata = knot_rrset_get_rdata(tsig);
+	if (!rdata) {
+		return KNOT_EBADARG;
+	}
+	assert(knot_rdata_item_count(rdata) >= 6);
+
+	/* Create the wire format. */
+	uint16_t *wire = malloc(sizeof(uint8_t) * length + 2 * sizeof(uint16_t));
+	if (!wire) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	/* Write the length. */
+	wire[0] = length + 2;
+	knot_wire_write_u16((uint8_t *)(wire + 1), length);
+	/* Copy the actual data. */
+	memcpy(wire + 2, other_data, sizeof(uint8_t) * length);
+	knot_rdata_item_set_raw_data(rdata, 6, wire);
+
+	return KNOT_EOK;
+}
+
+const knot_dname_t *tsig_rdata_alg_name(const knot_rrset_t *tsig)
+{
+	if (!tsig) {
+		return NULL;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		dbg_tsig("TSIG: rdata: alg name: no rdata.\n");
+		return NULL;
+	}
+
+	if (knot_rdata_item_count(rdata) < 1) {
+		dbg_tsig("TSIG: rdata: alg name: not enough items.\n");
+		return NULL;
+	}
+
+	return knot_rdata_item(rdata, 0)->dname;
+}
+
+tsig_algorithm_t tsig_rdata_alg(const knot_rrset_t *tsig)
+{
+	/*! \todo [TSIG] Implement me. */
+	return KNOT_TSIG_ALG_HMAC_MD5;
+}
+
+uint64_t tsig_rdata_time_signed(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 2) {
+		return 0;
+	}
+
+	uint16_t *wire = knot_rdata_item(rdata, 1)->raw_data;
+	assert(wire[0] == 6);
+	/* Skip the size. */
+	wire++;
+
+	return knot_wire_read_u48((uint8_t *)wire);
+}
+
+uint16_t tsig_rdata_fudge(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 3) {
+		return 0;
+	}
+
+	uint16_t *wire = knot_rdata_item(rdata, 2)->raw_data;
+	assert(wire[0] == 2);
+	/* Skip the size. */
+	wire++;
+
+	return knot_wire_read_u16((uint8_t *)wire);
+}
+
+const uint8_t *tsig_rdata_mac(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 4) {
+		return 0;
+	}
+
+	return (uint8_t*)(knot_rdata_item(rdata, 3)->raw_data + 2);
+}
+
+size_t tsig_rdata_mac_length(const knot_rrset_t *tsig)
+{
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata || knot_rdata_item_count(rdata) < 4) {
+		return 0;
+	}
+
+	return knot_wire_read_u16(
+	        (uint8_t *)(knot_rdata_item(rdata, 3)->raw_data + 1));
+}
+
+uint16_t tsig_rdata_orig_id(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 5) {
+		return 0;
+	}
+
+	uint16_t *wire = knot_rdata_item(rdata, 4)->raw_data;
+	assert(wire[0] == 2);
+	/* Skip the size. */
+	wire++;
+
+	return knot_wire_read_u16((uint8_t *)wire);
+}
+
+uint16_t tsig_rdata_error(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 6) {
+		return 0;
+	}
+
+	uint16_t *wire = knot_rdata_item(rdata, 5)->raw_data;
+	assert(wire[0] == 2);
+	/* Skip the size. */
+	wire++;
+
+	return knot_wire_read_u16((uint8_t *)wire);
+}
+
+const uint8_t *tsig_rdata_other_data(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 7) {
+		return 0;
+	}
+
+	return (uint8_t *)(knot_rdata_item(rdata, 6)->raw_data + 2);
+}
+
+uint16_t tsig_rdata_other_data_length(const knot_rrset_t *tsig)
+{
+	/*!< \note How about assert. Or maybe change API??? */
+	if (!tsig) {
+		return 0;
+	}
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(tsig);
+	if (!rdata) {
+		return 0;
+	}
+
+	if (knot_rdata_item_count(rdata) < 7) {
+		return 0;
+	}
+
+	return knot_wire_read_u16((uint8_t *)
+	                          (knot_rdata_item(rdata, 6)->raw_data + 1));
+}
+
+int tsig_alg_from_name(const knot_dname_t *alg_name)
+{
+	if (!alg_name) {
+		return 0;
+	}
+
+	char *name = knot_dname_to_str(alg_name);
+	if (!name) {
+		return 0;
+	}
+
+	knot_lookup_table_t *found =
+		knot_lookup_by_name(tsig_alg_table, name);
+
+	if (!found) {
+		dbg_tsig("Unknown algorithm: %s \n", name);
+		free(name);
+		return 0;
+	}
+
+	free(name);
+
+	return found->id;
+}
+
+uint16_t tsig_alg_digest_length(tsig_algorithm_t alg)
+{
+	switch (alg) {
+		case KNOT_TSIG_ALG_GSS_TSIG:
+			return KNOT_TSIG_ALG_DIG_LENGTH_GSS_TSIG;
+		case KNOT_TSIG_ALG_HMAC_MD5:
+			return KNOT_TSIG_ALG_DIG_LENGTH_HMAC_MD5;
+		case KNOT_TSIG_ALG_HMAC_SHA1:
+			return KNOT_TSIG_ALG_DIG_LENGTH_SHA1;
+		case KNOT_TSIG_ALG_HMAC_SHA224:
+			return KNOT_TSIG_ALG_DIG_LENGTH_SHA224;
+		case KNOT_TSIG_ALG_HMAC_SHA256:
+			return KNOT_TSIG_ALG_DIG_LENGTH_SHA384;
+		case KNOT_TSIG_ALG_HMAC_SHA512:
+			return KNOT_TSIG_ALG_DIG_LENGTH_SHA512;
+		default:
+			return 0;
+	} /* switch(alg) */
+}
+
+size_t tsig_rdata_tsig_variables_length(const knot_rrset_t *tsig)
+{
+	/* Key name, Algorithm name and Other data have variable lengths. */
+	const knot_dname_t *key_name = knot_rrset_owner(tsig);
+	if (!key_name) {
+		return 0;
+	}
+
+	const knot_dname_t *alg_name = tsig_rdata_alg_name(tsig);
+	if (!alg_name) {
+		return 0;
+	}
+
+//	dbg_tsig_detail("key_name: %.*s (size: %u) alg_name: %.*s (size: %u)\n", knot_dname_size(key_name),
+//	                key_name->name, alg_name->size,  alg_name->name,
+//	                key_name->size, alg_name->size);
+
+//	dbg_tsig_hex_detail(key_name->name, key_name->size);
+//	dbg_tsig_hex_detail(alg_name->name, alg_name->size);
+
+	uint16_t other_data_length = tsig_rdata_other_data_length(tsig);
+
+	return knot_dname_size(key_name) + knot_dname_size(alg_name) +
+	       other_data_length + KNOT_TSIG_VARIABLES_LENGTH;
+}
+
+size_t tsig_rdata_tsig_timers_length()
+{
+	return KNOT_TSIG_TIMERS_LENGTH;
+}
+
+
+int tsig_rdata_store_current_time(knot_rrset_t *tsig)
+{
+	if (!tsig) {
+		return KNOT_EBADARG;
+	}
+	time_t curr_time = time(NULL);
+	/*!< \todo bleeding eyes. */
+	tsig_rdata_set_time_signed(tsig, (uint64_t)curr_time);
+	return KNOT_EOK;
+}
+
+const char* tsig_alg_to_str(tsig_algorithm_t alg)
+{
+	for (unsigned i = 0; i < TSIG_ALG_TABLE_SIZE; ++i) {
+		if (tsig_alg_table[i].id == alg) {
+			return tsig_alg_table[i].name;
+		}
+	}
+
+	return "";
+}
+
+size_t tsig_wire_maxsize(const knot_key_t* key)
+{
+	size_t alg_name_size = strlen(tsig_alg_to_str(key->algorithm)) + 1;
+		
+	return knot_dname_size(key->name) +
+	sizeof(uint16_t) + /* TYPE */
+	sizeof(uint16_t) + /* CLASS */
+	sizeof(uint32_t) + /* TTL */
+	sizeof(uint16_t) + /* RDLENGTH */
+	alg_name_size + /* Alg. name */
+	6 * sizeof(uint8_t) + /* Time signed */
+	sizeof(uint16_t) + /* Fudge */
+	sizeof(uint16_t) + /* MAC size */
+	tsig_alg_digest_length(key->algorithm) + /* MAC */
+	sizeof(uint16_t) + /* Original ID */
+	sizeof(uint16_t) + /* Error */
+	sizeof(uint16_t) + /* Other len */
+	6* sizeof(uint8_t); /* uint48_t in case of BADTIME RCODE */
+}
+
+size_t tsig_wire_actsize(const knot_rrset_t *tsig)
+{
+	return knot_dname_size(knot_rrset_owner(tsig)) +
+	sizeof(uint16_t) + /* TYPE */
+	sizeof(uint16_t) + /* CLASS */
+	sizeof(uint32_t) + /* TTL */
+	sizeof(uint16_t) + /* RDLENGTH */
+	knot_dname_size(tsig_rdata_alg_name(tsig)) +
+	6 * sizeof(uint8_t) + /* Time signed */
+	sizeof(uint16_t) + /* Fudge */
+	sizeof(uint16_t) + /* MAC size */
+	tsig_rdata_mac_length(tsig) +
+	sizeof(uint16_t) + /* Original ID */
+	sizeof(uint16_t) + /* Error */
+	sizeof(uint16_t) + /* Other len */
+	tsig_rdata_other_data_length(tsig);
+}
+
diff --git a/src/libknot/tsig.h b/src/libknot/tsig.h
new file mode 100644
index 0000000..eafcfab
--- /dev/null
+++ b/src/libknot/tsig.h
@@ -0,0 +1,145 @@
+/*!
+ * \file tsig.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief TSIG manipulation.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_TSIG_H_
+#define _KNOT_TSIG_H_
+
+#include <stdint.h>
+
+#include "rrset.h"
+#include "util/utils.h"
+
+/* The assigned numbers should not begin with 0 - reserved for error. */
+enum tsig_algorithm {
+	KNOT_TSIG_ALG_NULL = 0,
+	KNOT_TSIG_ALG_GSS_TSIG = 128, /*!< \brief gss-tsig. */
+	KNOT_TSIG_ALG_HMAC_MD5, /*!< \brief HMAC-MD5.SIG-ALG.REG.INT. */
+	KNOT_TSIG_ALG_HMAC_SHA1, /*!< \brief hmac-sha1. */
+	KNOT_TSIG_ALG_HMAC_SHA224, /*!< \brief hmac-sha224. */
+	KNOT_TSIG_ALG_HMAC_SHA256, /*!< \brief hmac-sha256. */
+	KNOT_TSIG_ALG_HMAC_SHA384, /*!< \brief hmac-sha384. */
+	KNOT_TSIG_ALG_HMAC_SHA512 /*!< \brief hmac-sha512. */
+};
+
+typedef enum tsig_algorithm tsig_algorithm_t;
+
+struct knot_key {
+	knot_dname_t *name;   /*!< Key name. */
+	tsig_algorithm_t algorithm; /*!< Key algorithm.  */
+	char *secret;         /*!< Key data. */
+	size_t secret_size;   /*!< Key length. */
+};
+
+typedef struct knot_key knot_key_t;
+
+/*!< \todo FIND ALG LENGTHS */
+enum tsig_algorithm_digest_length {
+	KNOT_TSIG_ALG_DIG_LENGTH_GSS_TSIG = 0,
+	KNOT_TSIG_ALG_DIG_LENGTH_HMAC_MD5 = 16,
+	KNOT_TSIG_ALG_DIG_LENGTH_SHA1 = 0,
+	KNOT_TSIG_ALG_DIG_LENGTH_SHA224 = 0,
+	KNOT_TSIG_ALG_DIG_LENGTH_SHA256 = 0,
+	KNOT_TSIG_ALG_DIG_LENGTH_SHA384 = 0,
+	KNOT_TSIG_ALG_DIG_LENGTH_SHA512 = 0
+};
+
+enum tsig_consts {
+	KNOT_TSIG_ITEM_COUNT = 7,
+	KNOT_TSIG_VARIABLES_LENGTH = sizeof(uint16_t)	// class
+	                             + sizeof(uint32_t)	// ttl
+	                             + 6		// time signed
+	                             + sizeof(uint16_t)	// fudge
+	                             + sizeof(uint16_t)	// error
+	                             + sizeof(uint16_t),// other data length
+	KNOT_TSIG_TIMERS_LENGTH = sizeof(uint16_t)	//fugde
+	                          + 6			// time signed
+};
+
+/*! TSIG errors are defined in util/error.h
+ *  and present negative value of the TSIG error to
+ *  comply with other parts of the library.
+ *
+ *  KNOT_TSIG_EBADSIG = -16
+ *  KNOT_TSIG_EBADKEY = -17
+ *  KNOT_TSIG_EBADTIME = -18
+ */
+
+/*!
+ * \note Uses the given domain name, do not deallocate it!
+ */
+int tsig_rdata_set_alg_name(knot_rrset_t *tsig, knot_dname_t *alg_name);
+int tsig_rdata_set_alg(knot_rrset_t *tsig, tsig_algorithm_t alg);
+int tsig_rdata_set_time_signed(knot_rrset_t *tsig, uint64_t time);
+int tsig_rdata_store_current_time(knot_rrset_t *tsig);
+int tsig_rdata_set_fudge(knot_rrset_t *tsig, uint16_t fudge);
+int tsig_rdata_set_mac(knot_rrset_t *tsig, uint16_t length,
+                       const uint8_t *mac);
+int tsig_rdata_set_orig_id(knot_rrset_t *tsig, uint16_t id);
+int tsig_rdata_set_tsig_error(knot_rrset_t *tsig, uint16_t tsig_error);
+int tsig_rdata_set_other_data(knot_rrset_t *tsig, uint16_t length,
+                              const uint8_t *other_data);
+
+const knot_dname_t *tsig_rdata_alg_name(const knot_rrset_t *tsig);
+tsig_algorithm_t tsig_rdata_alg(const knot_rrset_t *tsig);
+uint64_t tsig_rdata_time_signed(const knot_rrset_t *tsig);
+uint16_t tsig_rdata_fudge(const knot_rrset_t *tsig);
+const uint8_t *tsig_rdata_mac(const knot_rrset_t *tsig);
+size_t tsig_rdata_mac_length(const knot_rrset_t *tsig);
+uint16_t tsig_rdata_orig_id(const knot_rrset_t *tsig);
+uint16_t tsig_rdata_error(const knot_rrset_t *tsig);
+const uint8_t *tsig_rdata_other_data(const knot_rrset_t *tsig);
+uint16_t tsig_rdata_other_data_length(const knot_rrset_t *tsig);
+size_t tsig_rdata_tsig_variables_length(const knot_rrset_t *tsig);
+
+size_t tsig_rdata_tsig_timers_length();
+
+int tsig_alg_from_name(const knot_dname_t *name);
+
+/*!
+ * \brief Convert TSIG algorithm identifier to name.
+ *
+ * \param alg TSIG algorithm identifier.
+ *
+ * \retval TSIG algorithm string name.
+ * \retval Empty string if undefined.
+ */
+const char* tsig_alg_to_str(tsig_algorithm_t alg);
+
+uint16_t tsig_alg_digest_length(tsig_algorithm_t alg);
+
+/*!
+ * \brief Return TSIG RRSET maximum wire size for given algorithm.
+ *
+ * \param key Signing key descriptor.
+ *
+ * \return RRSET wire size.
+ */
+size_t tsig_wire_maxsize(const knot_key_t *key);
+size_t tsig_wire_actsize(const knot_rrset_t *tsig);
+
+#endif /* _KNOT_TSIG_H_ */
+
+/*! @} */
diff --git a/src/libknot/updates/changesets.c b/src/libknot/updates/changesets.c
new file mode 100644
index 0000000..cf9e6a0
--- /dev/null
+++ b/src/libknot/updates/changesets.c
@@ -0,0 +1,296 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "updates/changesets.h"
+
+#include "rrset.h"
+#include "util/error.h"
+
+static const size_t KNOT_CHANGESET_COUNT = 5;
+static const size_t KNOT_CHANGESET_STEP = 5;
+static const size_t KNOT_CHANGESET_RRSET_COUNT = 5;
+static const size_t KNOT_CHANGESET_RRSET_STEP = 5;
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_changeset_check_count(knot_rrset_t ***rrsets, size_t count,
+                                        size_t *allocated)
+{
+	/* Check if allocated is sufficient. */
+	if (count <= *allocated) {
+		return KNOT_EOK;
+	}
+
+	/* How many steps is needed to content count? */
+	size_t extra = (count - *allocated) % KNOT_CHANGESET_RRSET_STEP;
+	extra = (extra + 1) * KNOT_CHANGESET_RRSET_STEP;
+
+	/* Allocate new memory block. */
+	const size_t item_len = sizeof(knot_rrset_t *);
+	const size_t new_count = *allocated + extra;
+	knot_rrset_t **rrsets_new = malloc(new_count * item_len);
+	if (rrsets_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Clear old memory block and copy old data. */
+	memset(rrsets_new, 0, new_count * item_len);
+	memcpy(rrsets_new, *rrsets, (*allocated) * item_len);
+
+	/* Replace old rrsets. */
+	free(*rrsets);
+	*rrsets = rrsets_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_changeset_rrsets_match(const knot_rrset_t *rrset1,
+                                         const knot_rrset_t *rrset2)
+{
+	return knot_rrset_compare(rrset1, rrset2, KNOT_RRSET_COMPARE_HEADER)
+	       && (knot_rrset_type(rrset1) != KNOT_RRTYPE_RRSIG
+	           || knot_rdata_rrsig_type_covered(
+	                    knot_rrset_rdata(rrset1))
+	              == knot_rdata_rrsig_type_covered(
+	                    knot_rrset_rdata(rrset2)));
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_allocate(knot_changesets_t **changesets)
+{
+	// create new changesets
+	*changesets = (knot_changesets_t *)(malloc(sizeof(knot_changesets_t)));
+	if (*changesets == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	memset(*changesets, 0, sizeof(knot_changesets_t));
+
+	return knot_changesets_check_size(*changesets);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_add_rrset(knot_rrset_t ***rrsets,
+                              size_t *count, size_t *allocated,
+                              knot_rrset_t *rrset)
+{
+	int ret = knot_changeset_check_count(rrsets, *count + 1, allocated);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	(*rrsets)[*count] = rrset;
+	*count = *count + 1;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_add_rr(knot_rrset_t ***rrsets, size_t *count,
+                           size_t *allocated, knot_rrset_t *rr)
+{
+	// try to find the RRSet in the list of RRSets, but search backwards
+	// as it is probable that the last RRSet is the one to which the RR
+	// belongs
+	int i = *count - 1;
+	
+	while (i >= 0 && !knot_changeset_rrsets_match((*rrsets)[i], rr)) {
+		--i;
+	}
+
+	if (i >= 0) {
+		// found RRSet to merge the new one into
+		if (knot_rrset_merge((void **)&(*rrsets)[i],
+		                       (void **)&rr) != KNOT_EOK) {
+			return KNOT_ERROR;
+		}
+
+		// remove the RR
+		/*! \todo does this make sense? */
+		knot_rrset_free(&rr); // used to be deep free with all 1's
+
+		return KNOT_EOK;
+	} else {
+		return knot_changeset_add_rrset(rrsets, count, allocated, rr);
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_add_new_rr(knot_changeset_t *changeset,
+                               knot_rrset_t *rrset,
+                               xfrin_changeset_part_t part)
+{
+	knot_rrset_t ***rrsets = NULL;
+	size_t *count = NULL;
+	size_t *allocated = NULL;
+
+	switch (part) {
+	case XFRIN_CHANGESET_ADD:
+		rrsets = &changeset->add;
+		count = &changeset->add_count;
+		allocated = &changeset->add_allocated;
+		break;
+	case XFRIN_CHANGESET_REMOVE:
+		rrsets = &changeset->remove;
+		count = &changeset->remove_count;
+		allocated = &changeset->remove_allocated;
+		break;
+	default:
+		assert(0);
+	}
+
+	assert(rrsets != NULL);
+	assert(count != NULL);
+	assert(allocated != NULL);
+
+	int ret = knot_changeset_add_rr(rrsets, count, allocated, rrset);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_changeset_store_soa(knot_rrset_t **chg_soa,
+                               uint32_t *chg_serial, knot_rrset_t *soa)
+{
+	*chg_soa = soa;
+	*chg_serial = knot_rdata_soa_serial(knot_rrset_rdata(soa));
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_add_soa(knot_changeset_t *changeset, knot_rrset_t *soa,
+                            xfrin_changeset_part_t part)
+{
+	switch (part) {
+	case XFRIN_CHANGESET_ADD:
+		knot_changeset_store_soa(&changeset->soa_to,
+		                          &changeset->serial_to, soa);
+		break;
+	case XFRIN_CHANGESET_REMOVE:
+		knot_changeset_store_soa(&changeset->soa_from,
+		                          &changeset->serial_from, soa);
+		break;
+	default:
+		assert(0);
+	}
+
+	/*! \todo Remove return value? */
+	return KNOT_EOK;
+}
+
+/*---------------------------------------------------------------------------*/
+
+int knot_changesets_check_size(knot_changesets_t *changesets)
+{
+	/* Check if allocated is sufficient. */
+	if (changesets->count <= changesets->allocated) {
+		return KNOT_EOK;
+	}
+
+	/* How many steps is needed to content count? */
+	size_t extra = (changesets->count - changesets->allocated) % KNOT_CHANGESET_STEP;
+	extra = (extra + 1) * KNOT_CHANGESET_STEP;
+
+	/* Allocate new memory block. */
+	const size_t item_len = sizeof(knot_changeset_t);
+	size_t new_count = (changesets->allocated + extra);
+	knot_changeset_t *sets = malloc(new_count * item_len);
+	if (sets == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Clear old memory block and copy old data. */
+	memset(sets, 0, new_count * item_len);
+	memcpy(sets, changesets->sets, changesets->allocated * item_len);
+
+	/* Replace old changesets. */
+	free(changesets->sets);
+	changesets->sets = sets;
+	changesets->allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_free_changeset(knot_changeset_t **changeset)
+{
+	/* XXX XXX investigate wrong frees. */
+	assert((*changeset)->add_allocated >= (*changeset)->add_count);
+	assert((*changeset)->remove_allocated >= (*changeset)->remove_count);
+	assert((*changeset)->allocated >= (*changeset)->size);
+
+	int j;
+	for (j = 0; j < (*changeset)->add_count; ++j) {
+		knot_rrset_deep_free(&(*changeset)->add[j], 1, 1, 1);
+	}
+	free((*changeset)->add);
+
+	for (j = 0; j < (*changeset)->remove_count; ++j) {
+		knot_rrset_deep_free(&(*changeset)->remove[j], 1, 1, 1);
+	}
+	free((*changeset)->remove);
+
+	knot_rrset_deep_free(&(*changeset)->soa_from, 1, 1, 1);
+	knot_rrset_deep_free(&(*changeset)->soa_to, 1, 1, 1);
+
+	free((*changeset)->data);
+
+
+	*changeset = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_free_changesets(knot_changesets_t **changesets)
+{
+	if (changesets == NULL || *changesets == NULL) {
+		return;
+	}
+
+	assert((*changesets)->allocated >= (*changesets)->count);
+
+	for (int i = 0; i < (*changesets)->count; ++i) {
+		knot_changeset_t *ch = &(*changesets)->sets[i];
+		knot_free_changeset(&ch);
+	}
+
+	free((*changesets)->sets);
+	
+	knot_rrset_deep_free(&(*changesets)->first_soa, 1, 1, 1);
+	
+	free(*changesets);
+	*changesets = NULL;
+}
+
+/*---------------------------------------------------------------------------*/
+
+
diff --git a/src/libknot/updates/changesets.h b/src/libknot/updates/changesets.h
new file mode 100644
index 0000000..e8d5e39
--- /dev/null
+++ b/src/libknot/updates/changesets.h
@@ -0,0 +1,102 @@
+/*!
+ * \file changesets.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Structure for representing IXFR/DDNS changeset and its API.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_CHANGESETS_H_
+#define _KNOT_CHANGESETS_H_
+
+#include "rrset.h"
+
+/*! \todo Changeset must be serializable/deserializable, so
+ *        all data and pointers have to be changeset-exclusive,
+ *        or more advanced structure serialization scheme has to be
+ *        implemented.
+ *
+ * \todo Preallocation of space for changeset.
+ */
+typedef struct {
+	knot_rrset_t *soa_from;
+	knot_rrset_t **remove;
+	size_t remove_count;
+	size_t remove_allocated;
+
+	knot_rrset_t *soa_to;
+	knot_rrset_t **add;
+	size_t add_count;
+	size_t add_allocated;
+
+	uint8_t *data;
+	size_t size;
+	size_t allocated;
+	uint32_t serial_from;
+	uint32_t serial_to;
+} knot_changeset_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct {
+	knot_changeset_t *sets;
+	size_t count;
+	size_t allocated;
+	knot_rrset_t *first_soa;
+} knot_changesets_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef enum {
+	XFRIN_CHANGESET_ADD,
+	XFRIN_CHANGESET_REMOVE
+} xfrin_changeset_part_t;
+
+/*----------------------------------------------------------------------------*/
+
+int knot_changeset_allocate(knot_changesets_t **changesets);
+
+int knot_changeset_add_rrset(knot_rrset_t ***rrsets,
+                             size_t *count, size_t *allocated,
+                             knot_rrset_t *rrset);
+
+int knot_changeset_add_rr(knot_rrset_t ***rrsets, size_t *count,
+                          size_t *allocated, knot_rrset_t *rr);
+
+int knot_changeset_add_new_rr(knot_changeset_t *changeset,
+                              knot_rrset_t *rrset,
+                              xfrin_changeset_part_t part);
+
+void knot_changeset_store_soa(knot_rrset_t **chg_soa,
+                              uint32_t *chg_serial, knot_rrset_t *soa);
+
+int knot_changeset_add_soa(knot_changeset_t *changeset, knot_rrset_t *soa,
+                           xfrin_changeset_part_t part);
+
+int knot_changesets_check_size(knot_changesets_t *changesets);
+
+void knot_free_changeset(knot_changeset_t **changeset);
+
+void knot_free_changesets(knot_changesets_t **changesets);
+
+#endif /* _KNOT_CHANGESETS_H_ */
+
+/*! @} */
diff --git a/src/libknot/updates/ddns.c b/src/libknot/updates/ddns.c
new file mode 100644
index 0000000..4c6ab7b
--- /dev/null
+++ b/src/libknot/updates/ddns.c
@@ -0,0 +1,638 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "updates/ddns.h"
+#include "updates/changesets.h"
+#include "util/debug.h"
+#include "packet/packet.h"
+#include "util/error.h"
+#include "consts.h"
+
+/*----------------------------------------------------------------------------*/
+// Copied from XFR - maybe extract somewhere else
+static int knot_ddns_prereq_check_rrsets(knot_rrset_t ***rrsets,
+                                         size_t *count, size_t *allocated)
+{
+	int new_count = 0;
+	if (*count == *allocated) {
+		new_count = *allocated * 2;
+	}
+
+	knot_rrset_t **rrsets_new =
+		(knot_rrset_t **)calloc(new_count, sizeof(knot_rrset_t *));
+	if (rrsets_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	memcpy(rrsets_new, *rrsets, *count);
+	*rrsets = rrsets_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_prereq_check_dnames(knot_dname_t ***dnames,
+                                         size_t *count, size_t *allocated)
+{
+	int new_count = 0;
+	if (*count == *allocated) {
+		new_count = *allocated * 2;
+	}
+
+	knot_dname_t **dnames_new =
+		(knot_dname_t **)calloc(new_count, sizeof(knot_dname_t *));
+	if (dnames_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	memcpy(dnames_new, *dnames, *count);
+	*dnames = dnames_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_add_prereq_rrset(const knot_rrset_t *rrset,
+                                      knot_rrset_t ***rrsets,
+                                      size_t *count, size_t *allocd)
+{
+	// check if such RRSet is not already there and merge if needed
+	int ret;
+	for (int i = 0; i < *count; ++i) {
+		if (knot_rrset_compare(rrset, (*rrsets)[i],
+		                       KNOT_RRSET_COMPARE_HEADER) == 0) {
+			ret = knot_rrset_merge((void **)&((*rrsets)[i]),
+			                       (void **)&rrset);
+			if (ret != KNOT_EOK) {
+				return ret;
+			} else {
+				return KNOT_EOK;
+			}
+		}
+	}
+
+	// if we are here, the RRSet was not found
+	ret = knot_ddns_prereq_check_rrsets(rrsets, count, allocd);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	knot_rrset_t *new_rrset = NULL;
+	ret = knot_rrset_deep_copy(rrset, &new_rrset);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	(*rrsets)[(*count)++] = new_rrset;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_add_prereq_dname(const knot_dname_t *dname,
+                                      knot_dname_t ***dnames,
+                                      size_t *count, size_t *allocd)
+{
+	// we do not have to check if the name is not already there
+	// if it is, we will just check it twice in the zone
+
+	int ret = knot_ddns_prereq_check_dnames(dnames, count, allocd);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	knot_dname_t *dname_new = knot_dname_deep_copy(dname);
+	if (dname_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	(*dnames)[(*count)++] = dname_new;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_add_prereq(knot_ddns_prereq_t *prereqs,
+                                const knot_rrset_t *rrset, uint16_t qclass)
+{
+	assert(prereqs != NULL);
+	assert(rrset != NULL);
+
+	if (knot_rrset_ttl(rrset) != 0) {
+		return KNOT_EMALF;
+	}
+
+	int ret;
+
+	if (knot_rrset_class(rrset) == KNOT_CLASS_ANY) {
+		if (knot_rrset_rdata(rrset) != NULL) {
+			return KNOT_EMALF;
+		}
+		if (knot_rrset_type(rrset) == KNOT_RRTYPE_ANY) {
+			ret = knot_ddns_add_prereq_dname(
+				knot_rrset_owner(rrset), &prereqs->in_use,
+				&prereqs->in_use_count,
+				&prereqs->in_use_allocd);
+		} else {
+			ret = knot_ddns_add_prereq_rrset(rrset,
+			                                &prereqs->exist,
+			                                &prereqs->exist_count,
+			                                &prereqs->exist_allocd);
+		}
+	} else if (knot_rrset_class(rrset) == KNOT_CLASS_NONE) {
+		if (knot_rrset_rdata(rrset) != NULL) {
+			return KNOT_EMALF;
+		}
+		if (knot_rrset_type(rrset) == KNOT_RRTYPE_ANY) {
+			ret = knot_ddns_add_prereq_dname(
+				knot_rrset_owner(rrset), &prereqs->not_in_use,
+				&prereqs->not_in_use_count,
+				&prereqs->not_in_use_allocd);
+		} else {
+			ret = knot_ddns_add_prereq_rrset(rrset,
+			                            &prereqs->not_exist,
+			                            &prereqs->not_exist_count,
+			                            &prereqs->not_exist_allocd);
+		}
+	} else if (knot_rrset_class(rrset) == qclass) {
+		ret = knot_ddns_add_prereq_rrset(rrset,
+		                                 &prereqs->exist_full,
+		                                 &prereqs->exist_full_count,
+		                                 &prereqs->exist_full_allocd);
+	} else {
+		return KNOT_EMALF;
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_add_update(knot_changeset_t *changeset,
+                         const knot_rrset_t *rrset, uint16_t qclass)
+{
+	assert(changeset != NULL);
+	assert(rrset != NULL);
+
+	int ret;
+
+	// create a copy of the RRSet
+	/*! \todo If the packet was not parsed all at once, we could save this
+	 *        copy.
+	 */
+	knot_rrset_t *rrset_copy;
+	ret = knot_rrset_deep_copy(rrset, &rrset_copy);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	/*! \todo What about the SOAs? */
+
+	if (knot_rrset_class(rrset) == qclass) {
+		// this RRSet should be added to the zone
+		ret = knot_changeset_add_rr(&changeset->add,
+		                            &changeset->add_count,
+		                            &changeset->add_allocated,
+		                            rrset_copy);
+	} else {
+		// this RRSet marks removal of something from zone
+		// what should be removed is distinguished when applying
+		ret = knot_changeset_add_rr(&changeset->remove,
+		                            &changeset->remove_count,
+		                            &changeset->remove_allocated,
+		                            rrset_copy);
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_exist(const knot_zone_contents_t *zone,
+                                 const knot_rrset_t *rrset, uint8_t *rcode)
+{
+	assert(zone != NULL);
+	assert(rrset != NULL);
+	assert(rcode != NULL);
+	assert(knot_rrset_rdata(rrset) == NULL);
+	assert(knot_rrset_type(rrset) != KNOT_RRTYPE_ANY);
+	assert(knot_rrset_ttl(rrset) == 0);
+	assert(knot_rrset_class(rrset) == KNOT_CLASS_ANY);
+
+	if (!knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	    knot_node_owner(knot_zone_contents_apex(zone)))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	const knot_node_t *node;
+	node = knot_zone_contents_find_node(zone, knot_rrset_owner(rrset));
+	if (node == NULL) {
+		*rcode = KNOT_RCODE_NXRRSET;
+		return KNOT_ENONODE;
+	} else if (knot_node_rrset(node, knot_rrset_type(rrset)) == NULL) {
+		*rcode = KNOT_RCODE_NXRRSET;
+		return KNOT_ENORRSET;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_exist_full(const knot_zone_contents_t *zone,
+                                      const knot_rrset_t *rrset, uint8_t *rcode)
+{
+	assert(zone != NULL);
+	assert(rrset != NULL);
+	assert(rcode != NULL);
+	assert(knot_rrset_rdata(rrset) == NULL);
+	assert(knot_rrset_type(rrset) != KNOT_RRTYPE_ANY);
+	assert(knot_rrset_ttl(rrset) == 0);
+	assert(knot_rrset_class(rrset) == KNOT_CLASS_ANY);
+
+	if (!knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	    knot_node_owner(knot_zone_contents_apex(zone)))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	const knot_node_t *node;
+	const knot_rrset_t *found;
+
+	node = knot_zone_contents_find_node(zone, knot_rrset_owner(rrset));
+	if (node == NULL) {
+		*rcode = KNOT_RCODE_NXRRSET;
+		return KNOT_EPREREQ;
+	} else if ((found = knot_node_rrset(node, knot_rrset_type(rrset)))
+	            == NULL) {
+		*rcode = KNOT_RCODE_NXRRSET;
+		return KNOT_EPREREQ;
+	} else {
+		// do not have to compare the header, it is already done
+		assert(knot_rrset_type(found) == knot_rrset_type(rrset));
+		assert(knot_dname_compare(knot_rrset_owner(found),
+		                          knot_rrset_owner(rrset)) == 0);
+		if (knot_rrset_compare_rdata(found, rrset) <= 0) {
+			*rcode = KNOT_RCODE_NXRRSET;
+			return KNOT_EPREREQ;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_not_exist(const knot_zone_contents_t *zone,
+                                     const knot_rrset_t *rrset, uint8_t *rcode)
+{
+	assert(zone != NULL);
+	assert(rrset != NULL);
+	assert(rcode != NULL);
+	assert(knot_rrset_rdata(rrset) == NULL);
+	assert(knot_rrset_type(rrset) != KNOT_RRTYPE_ANY);
+	assert(knot_rrset_ttl(rrset) == 0);
+	assert(knot_rrset_class(rrset) == KNOT_CLASS_NONE);
+
+	if (!knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	    knot_node_owner(knot_zone_contents_apex(zone)))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	const knot_node_t *node;
+	const knot_rrset_t *found;
+
+	node = knot_zone_contents_find_node(zone, knot_rrset_owner(rrset));
+	if (node == NULL) {
+		return KNOT_EOK;
+	} else if ((found = knot_node_rrset(node, knot_rrset_type(rrset)))
+	            == NULL) {
+		return KNOT_EOK;
+	} else {
+		// do not have to compare the header, it is already done
+		assert(knot_rrset_type(found) == knot_rrset_type(rrset));
+		assert(knot_dname_compare(knot_rrset_owner(found),
+		                          knot_rrset_owner(rrset)) == 0);
+		if (knot_rrset_compare_rdata(found, rrset) <= 0) {
+			return KNOT_EOK;
+		}
+	}
+
+	*rcode = KNOT_RCODE_YXRRSET;
+	return KNOT_EPREREQ;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_in_use(const knot_zone_contents_t *zone,
+                                  const knot_dname_t *dname, uint8_t *rcode)
+{
+	assert(zone != NULL);
+	assert(dname != NULL);
+	assert(rcode != NULL);
+
+	if (!knot_dname_is_subdomain(dname,
+	    knot_node_owner(knot_zone_contents_apex(zone)))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	const knot_node_t *node;
+
+	node = knot_zone_contents_find_node(zone, dname);
+	if (node == NULL) {
+		*rcode = KNOT_RCODE_NXDOMAIN;
+		return KNOT_EPREREQ;
+	} else if (knot_node_rrset_count(node) == 0) {
+		*rcode = KNOT_RCODE_NXDOMAIN;
+		return KNOT_EPREREQ;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_not_in_use(const knot_zone_contents_t *zone,
+                                      const knot_dname_t *dname, uint8_t *rcode)
+{
+	assert(zone != NULL);
+	assert(dname != NULL);
+	assert(rcode != NULL);
+
+	if (!knot_dname_is_subdomain(dname,
+	    knot_node_owner(knot_zone_contents_apex(zone)))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	const knot_node_t *node;
+
+	node = knot_zone_contents_find_node(zone, dname);
+	if (node == NULL) {
+		return KNOT_EOK;
+	} else if (knot_node_rrset_count(node) == 0) {
+		return KNOT_EOK;
+	}
+
+	*rcode = KNOT_RCODE_YXDOMAIN;
+	return KNOT_EPREREQ;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int knot_ddns_check_zone(const knot_zone_t *zone, knot_packet_t *query,
+                         uint8_t *rcode)
+{
+	if (zone == NULL || query == NULL || rcode == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	if (knot_packet_qtype(query) != KNOT_RRTYPE_SOA) {
+		*rcode = KNOT_RCODE_FORMERR;
+		return KNOT_EMALF;
+	}
+
+	if(!knot_zone_contents(zone)) {
+		*rcode = KNOT_RCODE_REFUSED;
+		return KNOT_ENOZONE;
+	}
+
+	// 1) check if the zone is master or slave
+	if (!knot_zone_is_master(zone)) {
+		return KNOT_EBADZONE;
+	}
+
+	// 2) check zone CLASS
+	if (knot_zone_contents_class(knot_zone_contents(zone)) !=
+	    knot_packet_qclass(query)) {
+		*rcode = KNOT_RCODE_NOTAUTH;
+		return KNOT_ENOZONE;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ddns_process_prereqs(knot_packet_t *query,
+                              knot_ddns_prereq_t **prereqs, uint8_t *rcode)
+{
+	/*! \todo Consider not parsing the whole packet at once, but
+	 *        parsing one RR at a time - could save some memory and time.
+	 */
+
+	if (query == NULL || prereqs == NULL || rcode == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// allocate space for the prerequisities
+	*prereqs = (knot_ddns_prereq_t *)calloc(1, sizeof(knot_ddns_prereq_t));
+	CHECK_ALLOC_LOG(*prereqs, KNOT_ENOMEM);
+
+	int ret;
+
+	for (int i = 0; i < knot_packet_answer_rrset_count(query); ++i) {
+		// we must copy the RRSets, because all those stored in the
+		// packet will be destroyed
+		ret = knot_ddns_add_prereq(*prereqs,
+		                           knot_packet_answer_rrset(query, i),
+		                           knot_packet_qclass(query));
+		if (ret != KNOT_EOK) {
+			dbg_ddns("Failed to add prerequisity RRSet:%s\n",
+			                knot_strerror(ret));
+			*rcode = (ret == KNOT_EMALF) ? KNOT_RCODE_FORMERR
+			                             : KNOT_RCODE_SERVFAIL;
+			knot_ddns_prereqs_free(prereqs);
+			return ret;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ddns_check_prereqs(const knot_zone_contents_t *zone,
+                            knot_ddns_prereq_t **prereqs, uint8_t *rcode)
+{
+	int i, ret;
+
+	for (i = 0; i < (*prereqs)->exist_count; ++i) {
+		ret = knot_ddns_check_exist(zone, (*prereqs)->exist[i], rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	for (i = 0; i < (*prereqs)->exist_full_count; ++i) {
+		ret = knot_ddns_check_exist_full(zone,
+		                                (*prereqs)->exist_full[i],
+		                                 rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	for (i = 0; i < (*prereqs)->not_exist_count; ++i) {
+		ret = knot_ddns_check_not_exist(zone, (*prereqs)->not_exist[i],
+		                                rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	for (i = 0; i < (*prereqs)->in_use_count; ++i) {
+		ret = knot_ddns_check_in_use(zone, (*prereqs)->in_use[i],
+		                             rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	for (i = 0; i < (*prereqs)->not_in_use_count; ++i) {
+		ret = knot_ddns_check_not_in_use(zone,
+		                                 (*prereqs)->not_in_use[i],
+		                                 rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_ddns_check_update(const knot_rrset_t *rrset,
+                                  const knot_packet_t *query, uint8_t *rcode)
+{
+	if (!knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	                             knot_packet_qname(query))) {
+		*rcode = KNOT_RCODE_NOTZONE;
+		return KNOT_EBADZONE;
+	}
+
+	if (knot_rrset_class(rrset) == knot_packet_qclass(query)) {
+		if (knot_rrtype_is_metatype(knot_rrset_type(rrset))) {
+			*rcode = KNOT_RCODE_FORMERR;
+			return KNOT_EMALF;
+		}
+	} else if (knot_rrset_class(rrset) == KNOT_CLASS_ANY) {
+		if (knot_rrset_rdata(rrset) != NULL
+		    || (knot_rrtype_is_metatype(knot_rrset_type(rrset))
+		        && knot_rrset_type(rrset) != KNOT_RRTYPE_ANY)) {
+			*rcode = KNOT_RCODE_FORMERR;
+			return KNOT_EMALF;
+		}
+	} else if (knot_rrset_class(rrset) == KNOT_CLASS_NONE) {
+		if (knot_rrset_ttl(rrset) != 0
+		    || knot_rrtype_is_metatype(knot_rrset_type(rrset))) {
+			*rcode = KNOT_RCODE_FORMERR;
+			return KNOT_EMALF;
+		}
+	} else {
+		*rcode = KNOT_RCODE_FORMERR;
+		return KNOT_EMALF;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_ddns_process_update(knot_packet_t *query,
+                             knot_changeset_t **changeset, uint8_t *rcode)
+{
+	// just put all RRSets from query's Authority section
+	// it will be distinguished when applying to the zone
+
+	if (query == NULL || changeset == NULL || rcode == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	*changeset = (knot_changeset_t *)calloc(1, sizeof(knot_changeset_t));
+	CHECK_ALLOC_LOG(*changeset, KNOT_ENOMEM);
+
+	int ret;
+
+	for (int i = 0; i < knot_packet_authority_rrset_count(query); ++i) {
+
+		const knot_rrset_t *rrset =
+				knot_packet_authority_rrset(query, i);
+
+		ret = knot_ddns_check_update(rrset, query, rcode);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+
+		ret = knot_ddns_add_update(*changeset, rrset,
+		                          knot_packet_qclass(query));
+
+		if (ret != KNOT_EOK) {
+			dbg_ddns("Failed to add update RRSet:%s\n",
+			                knot_strerror(ret));
+			*rcode = (ret == KNOT_EMALF) ? KNOT_RCODE_FORMERR
+			                             : KNOT_RCODE_SERVFAIL;
+			knot_free_changeset(changeset);
+			return ret;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_ddns_prereqs_free(knot_ddns_prereq_t **prereq)
+{
+	int i;
+
+	for (i = 0; i < (*prereq)->exist_count; ++i) {
+		knot_rrset_deep_free(&(*prereq)->exist[i], 1, 1, 1);
+	}
+
+	for (i = 0; i < (*prereq)->exist_full_count; ++i) {
+		knot_rrset_deep_free(&(*prereq)->exist_full[i], 1, 1, 1);
+	}
+
+	for (i = 0; i < (*prereq)->not_exist_count; ++i) {
+		knot_rrset_deep_free(&(*prereq)->not_exist[i], 1, 1, 1);
+	}
+
+	for (i = 0; i < (*prereq)->in_use_count; ++i) {
+		knot_dname_free(&(*prereq)->in_use[i]);
+	}
+
+	for (i = 0; i < (*prereq)->not_in_use_count; ++i) {
+		knot_dname_free(&(*prereq)->not_in_use[i]);
+	}
+
+	free(*prereq);
+	*prereq = NULL;
+}
diff --git a/src/libknot/updates/ddns.h b/src/libknot/updates/ddns.h
new file mode 100644
index 0000000..dceebed
--- /dev/null
+++ b/src/libknot/updates/ddns.h
@@ -0,0 +1,74 @@
+/*!
+ * \file ddns.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Dynamic updates processing.
+ *
+ * \addtogroup query_processing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_DDNS_H_
+#define _KNOT_DDNS_H_
+
+#include "updates/changesets.h"
+#include "zone/zone.h"
+#include "packet/packet.h"
+#include "rrset.h"
+#include "dname.h"
+
+typedef struct knot_ddns_prereq_t {
+	knot_rrset_t **exist;
+	size_t exist_count;
+	size_t exist_allocd;
+
+	knot_rrset_t **exist_full;
+	size_t exist_full_count;
+	size_t exist_full_allocd;
+
+	knot_rrset_t **not_exist;
+	size_t not_exist_count;
+	size_t not_exist_allocd;
+
+	knot_dname_t **in_use;
+	size_t in_use_count;
+	size_t in_use_allocd;
+
+	knot_dname_t **not_in_use;
+	size_t not_in_use_count;
+	size_t not_in_use_allocd;
+} knot_ddns_prereq_t;
+
+int knot_ddns_check_zone(const knot_zone_t *zone, knot_packet_t *query,
+                         uint8_t *rcode);
+
+int knot_ddns_process_prereqs(knot_packet_t *query,
+                              knot_ddns_prereq_t **prereqs, uint8_t *rcode);
+
+int knot_ddns_check_prereqs(const knot_zone_contents_t *zone,
+                            knot_ddns_prereq_t **prereqs, uint8_t *rcode);
+
+int knot_ddns_process_update(knot_packet_t *query,
+                             knot_changeset_t **changeset, uint8_t *rcode);
+
+void knot_ddns_prereqs_free(knot_ddns_prereq_t **prereq);
+
+#endif /* _KNOT_DDNS_H_ */
+
+/*! @} */
diff --git a/src/libknot/updates/xfr-in.c b/src/libknot/updates/xfr-in.c
new file mode 100644
index 0000000..51be430
--- /dev/null
+++ b/src/libknot/updates/xfr-in.c
@@ -0,0 +1,3013 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <urcu.h>
+
+#include "updates/xfr-in.h"
+
+#include "nameserver/name-server.h"
+#include "util/wire.h"
+#include "util/debug.h"
+// #include "knot/zone/zone-dump.h"
+// #include "knot/zone/zone-load.h"
+#include "packet/packet.h"
+#include "dname.h"
+#include "zone/zone.h"
+#include "packet/query.h"
+#include "packet/response.h"
+#include "util/error.h"
+#include "updates/changesets.h"
+#include "tsig.h"
+#include "tsig-op.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_create_query(knot_dname_t *qname, uint16_t qtype,
+			      uint16_t qclass, knot_ns_xfr_t *xfr, size_t *size,
+			      const knot_rrset_t *soa, int use_tsig)
+{
+	knot_packet_t *pkt = knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	CHECK_ALLOC_LOG(pkt, KNOT_ENOMEM);
+	
+	/*! \todo Get rid of the numeric constant. */
+	int rc = knot_packet_set_max_size(pkt, 512);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOT_ERROR;
+	}
+
+	rc = knot_query_init(pkt);
+	if (rc != KNOT_EOK) {
+		knot_packet_free(&pkt);
+		return KNOT_ERROR;
+	}
+
+	knot_question_t question;
+
+	/* Retain qname until the question is freed. */
+	knot_dname_retain(qname);
+
+	/* Set random query ID. */
+	knot_packet_set_random_id(pkt);
+	knot_wire_set_id(pkt->wireformat, pkt->header.id);
+
+	// this is ugly!!
+	question.qname = (knot_dname_t *)qname;
+	question.qtype = qtype;
+	question.qclass = qclass;
+
+	rc = knot_query_set_question(pkt, &question);
+	if (rc != KNOT_EOK) {
+		knot_dname_release(question.qname);
+		knot_packet_free(&pkt);
+		return KNOT_ERROR;
+	}
+	
+	/* Reserve space for TSIG. */
+	if (use_tsig && xfr->tsig_key) {
+		dbg_xfrin_detail("xfrin: setting packet TSIG size to %zu\n",
+				 xfr->tsig_size);
+		knot_packet_set_tsig_size(pkt, xfr->tsig_size);
+	}
+
+	/* Add SOA RR to authority section for IXFR. */
+	if (qtype == KNOT_RRTYPE_IXFR && soa) {
+		knot_query_add_rrset_authority(pkt, soa);
+	}
+
+	/*! \todo OPT RR ?? */
+
+	uint8_t *wire = NULL;
+	size_t wire_size = 0;
+	rc = knot_packet_to_wire(pkt, &wire, &wire_size);
+	if (rc != KNOT_EOK) {
+		dbg_xfrin("Failed to write packet to wire.\n");
+		knot_dname_release(question.qname);
+		knot_packet_free(&pkt);
+		return KNOT_ERROR;
+	}
+
+	if (wire_size > *size) {
+		dbg_xfrin("Not enough space provided for the wire "
+		               "format of the query.\n");
+		knot_packet_free(&pkt);
+		return KNOT_ESPACE;
+	}
+	
+	// wire format created, sign it with TSIG if required
+	if (use_tsig && xfr->tsig_key) {
+		char *name = knot_dname_to_str(xfr->tsig_key->name);
+		dbg_xfrin_detail("Signing XFR query with key (name %s): \n",
+		                  name);
+		free(name);		
+		dbg_xfrin_hex_detail(xfr->tsig_key->secret, 
+		                     xfr->tsig_key->secret_size);
+		
+		xfr->digest_size = xfr->digest_max_size;
+		rc = knot_tsig_sign(wire, &wire_size, *size, NULL, 0, 
+		               xfr->digest, &xfr->digest_size, xfr->tsig_key);
+		if (rc != KNOT_EOK) {
+			/*! \todo [TSIG] Handle TSIG errors. */
+			knot_packet_free(&pkt);
+			return rc;
+		}
+		
+		dbg_xfrin_detail("Signed XFR query, new wire size: %zu, digest:"
+		                 "\n", wire_size);
+		dbg_xfrin_hex_detail((const char*)xfr->digest, xfr->digest_size);
+	}
+
+	memcpy(xfr->wire, wire, wire_size);
+	*size = wire_size;
+
+	dbg_xfrin("Created query of size %zu.\n", *size);
+	knot_packet_dump(pkt);
+
+	knot_packet_free(&pkt);
+
+	/* Release qname. */
+	knot_dname_release(question.qname);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int xfrin_create_soa_query(knot_dname_t *owner, knot_ns_xfr_t *xfr,
+                           size_t *size)
+{
+	/*! \todo [TSIG] Should TSIG apply for SOA query too? */
+	return xfrin_create_query(owner, KNOT_RRTYPE_SOA,
+				  KNOT_CLASS_IN, xfr, size, 0, 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_transfer_needed(const knot_zone_contents_t *zone,
+                          knot_packet_t *soa_response)
+{
+	// first, parse the rest of the packet
+	assert(!knot_packet_is_query(soa_response));
+	dbg_xfrin("Response - parsed: %zu, total wire size: %zu\n",
+	         soa_response->parsed, soa_response->size);
+	int ret;
+
+	if (soa_response->parsed < soa_response->size) {
+		ret = knot_packet_parse_rest(soa_response);
+		if (ret != KNOT_EOK) {
+			return KNOT_EMALF;
+		}
+	}
+
+	/*
+	 * Retrieve the local Serial
+	 */
+	const knot_rrset_t *soa_rrset =
+		knot_node_rrset(knot_zone_contents_apex(zone),
+		                KNOT_RRTYPE_SOA);
+	if (soa_rrset == NULL) {
+		char *name = knot_dname_to_str(knot_node_owner(
+				knot_zone_contents_apex(zone)));
+		dbg_xfrin("SOA RRSet missing in the zone %s!\n", name);
+		free(name);
+		return KNOT_ERROR;
+	}
+
+	int64_t local_serial = knot_rdata_soa_serial(
+		knot_rrset_rdata(soa_rrset));
+	if (local_serial < 0) {
+dbg_xfrin_exec(
+		char *name = knot_dname_to_str(knot_rrset_owner(soa_rrset));
+		dbg_xfrin("Malformed data in SOA of zone %s\n", name);
+		free(name);
+);
+		return KNOT_EMALF;	// maybe some other error
+	}
+
+	/*
+	 * Retrieve the remote Serial
+	 */
+	// the SOA should be the first (and only) RRSet in the response
+	soa_rrset = knot_packet_answer_rrset(soa_response, 0);
+	if (soa_rrset == NULL
+	    || knot_rrset_type(soa_rrset) != KNOT_RRTYPE_SOA) {
+		return KNOT_EMALF;
+	}
+
+	int64_t remote_serial = knot_rdata_soa_serial(
+		knot_rrset_rdata(soa_rrset));
+	if (remote_serial < 0) {
+		return KNOT_EMALF;	// maybe some other error
+	}
+
+	return (ns_serial_compare(local_serial, remote_serial) < 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_create_axfr_query(knot_dname_t *owner, knot_ns_xfr_t *xfr,
+                            size_t *size, int use_tsig)
+{
+	return xfrin_create_query(owner, KNOT_RRTYPE_AXFR,
+				  KNOT_CLASS_IN, xfr, size, 0, use_tsig);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_create_ixfr_query(const knot_zone_contents_t *zone, 
+                            knot_ns_xfr_t *xfr, size_t *size, int use_tsig)
+{
+	/*!
+	 *  \todo Implement properly.
+	 */
+	knot_node_t *apex = knot_zone_contents_get_apex(zone);
+	const knot_rrset_t *soa = knot_node_rrset(apex, KNOT_RRTYPE_SOA);
+
+	return xfrin_create_query(knot_node_get_owner(apex), KNOT_RRTYPE_IXFR,
+	                          KNOT_CLASS_IN, xfr, size, soa, use_tsig);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_add_orphan_rrsig(xfrin_orphan_rrsig_t *rrsigs, 
+                                  knot_rrset_t *rr)
+{
+	// try to find similar RRSIGs (check owner and type covered) in the list
+	assert(knot_rrset_type(rr) == KNOT_RRTYPE_RRSIG);
+	
+	int ret = 0;
+	xfrin_orphan_rrsig_t **last = &rrsigs;
+	while (*last != NULL) {
+		// check if the RRSIG is not similar to the one we want to add
+		assert((*last)->rrsig != NULL);
+		if (knot_rrset_compare((*last)->rrsig, rr, 
+		                       KNOT_RRSET_COMPARE_HEADER) == 1
+		    && knot_rdata_rrsig_type_covered(knot_rrset_rdata(
+		                                      (*last)->rrsig))
+		       == knot_rdata_rrsig_type_covered(knot_rrset_rdata(rr))) {
+			ret = knot_rrset_merge((void **)&(*last)->rrsig, 
+			                       (void **)&rr);
+			if (ret != KNOT_EOK) {
+				return ret;
+			} else {
+				return 1;
+			}
+		}
+		last = &((*last)->next);
+	}
+	
+	assert(*last == NULL);
+	// we did not find the right RRSIGs, add to the end
+	*last = (xfrin_orphan_rrsig_t *)malloc(sizeof(xfrin_orphan_rrsig_t));
+	CHECK_ALLOC_LOG(*last, KNOT_ENOMEM);
+	
+	(*last)->rrsig = rr;
+	(*last)->next = NULL;
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_process_orphan_rrsigs(knot_zone_contents_t *zone, 
+                                       xfrin_orphan_rrsig_t *rrsigs)
+{
+	xfrin_orphan_rrsig_t **last = &rrsigs;
+	int ret = 0;
+	while (*last != NULL) {
+		knot_rrset_t *rrset = NULL;
+		knot_node_t *node = NULL;
+		ret = knot_zone_contents_add_rrsigs(zone, (*last)->rrsig, 
+		                                    &rrset, &node, 
+		                                    KNOT_RRSET_DUPL_MERGE, 1);
+		if (ret > 0) {
+			knot_rrset_free(&(*last)->rrsig);
+		} else if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add orphan RRSIG to zone.\n");
+			return ret;
+		} else {
+			(*last)->rrsig = NULL;
+		}
+		
+		last = &((*last)->next);
+	}
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_free_orphan_rrsigs(xfrin_orphan_rrsig_t **rrsigs)
+{
+	xfrin_orphan_rrsig_t *r = *rrsigs;
+	while (r != NULL) {
+		xfrin_orphan_rrsig_t *prev = r;
+		r = r->next;
+		free(prev);
+	}
+	
+	*rrsigs = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+/*! \note [TSIG] */
+static int xfrin_check_tsig(knot_packet_t *packet, knot_ns_xfr_t *xfr,
+                            int tsig_req)
+{
+	assert(packet != NULL);
+	assert(xfr != NULL);
+	
+	dbg_xfrin_verb("xfrin_check_tsig(): packet nr: %d, required: %d\n", 
+	               xfr->packet_nr, tsig_req);
+	
+	/*
+	 * If we are expecting it (i.e. xfr->prev_digest_size > 0)
+	 *   a) it should be there (first, last or each 100th packet) and it
+	 *      is not
+	 *        Then we should discard the changes and close the connection.
+	 *   b) it should be there and it is or it may not be there (other 
+	 *      packets) and it is
+	 *        We validate the TSIG and reset packet number counting and
+	 *        data aggregation.
+	 *
+	 * If we are not expecting it (i.e. xfr->prev_digest_size <= 0) and
+	 * it is there => it should probably be considered an error
+	 */
+	knot_rrset_t *tsig = NULL;
+	int ret = knot_packet_parse_next_rr_additional(packet, &tsig);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+	
+	if (xfr->tsig_key) {
+		if (tsig_req && tsig == NULL) {
+			// TSIG missing!!
+			return KNOT_EMALF;
+		} else if (tsig != NULL) {
+			// TSIG there, either required or not, process
+			if (xfr->packet_nr == 0) {
+				ret = knot_tsig_client_check(tsig, 
+					xfr->wire, xfr->wire_size, 
+					xfr->digest, xfr->digest_size,
+					xfr->tsig_key);
+			} else {
+				ret = knot_tsig_client_check_next(tsig, 
+					xfr->wire, xfr->wire_size, 
+					xfr->digest, xfr->digest_size,
+					xfr->tsig_key);
+			}
+			
+			if (ret != KNOT_EOK) {
+				/*! \note [TSIG] No need to check TSIG error 
+				 *        here, propagate and check elsewhere.*/
+				return ret;
+			}
+			
+			// and reset the data storage
+			//xfr->packet_nr = 1;
+			xfr->tsig_data_size = 0;
+
+			// Extract the digest from the TSIG RDATA and store it.
+			if (xfr->digest_max_size < tsig_rdata_mac_length(tsig)) {
+				return KNOT_ESPACE;
+			}
+			memcpy(xfr->digest, tsig_rdata_mac(tsig), 
+			       tsig_rdata_mac_length(tsig));
+			xfr->digest_size = tsig_rdata_mac_length(tsig);
+			
+		} else { // TSIG not required and not there
+			// just append the wireformat to the TSIG data
+			assert(KNOT_NS_TSIG_DATA_MAX_SIZE - xfr->tsig_data_size
+			       >= xfr->wire_size);
+			memcpy(xfr->tsig_data + xfr->tsig_data_size,
+			       xfr->wire, xfr->wire_size);
+			xfr->tsig_data_size += xfr->wire_size;
+		}
+	} else if (tsig != NULL) {
+		// TSIG where it should not be
+		return KNOT_EMALF;
+	}
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_process_axfr_packet(/*const uint8_t *pkt, size_t size,
+                              xfrin_constructed_zone_t **constr*/
+                              knot_ns_xfr_t *xfr)
+{
+	const uint8_t *pkt = xfr->wire;
+	size_t size = xfr->wire_size;
+	xfrin_constructed_zone_t **constr = 
+			(xfrin_constructed_zone_t **)(&xfr->data);
+	
+	if (pkt == NULL || constr == NULL) {
+		dbg_xfrin("Wrong parameters supported.\n");
+		return KNOT_EBADARG;
+	}
+	
+	dbg_xfrin("Processing AXFR packet of size %zu.\n", size);
+	
+	// check if the response is OK
+	if (knot_wire_get_rcode(pkt) != KNOT_RCODE_NOERROR) {
+		return KNOT_EXFRREFUSED;
+	}
+	
+	/*! \todo Should TC bit be checked? */
+
+	knot_packet_t *packet =
+			knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	if (packet == NULL) {
+		dbg_xfrin("Could not create packet structure.\n");
+		return KNOT_ENOMEM;
+	}
+
+	int ret = knot_packet_parse_from_wire(packet, pkt, size, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Could not parse packet: %s.\n",
+		               knot_strerror(ret));
+		knot_packet_free(&packet);
+		/*! \todo Cleanup. */
+		return KNOT_EMALF;
+	}
+	
+	/*! \todo [TSIG] If packet RCODE is NOTAUTH(9), process as TSIG error. */
+
+	knot_rrset_t *rr = NULL;
+	ret = knot_packet_parse_next_rr_answer(packet, &rr);
+
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Could not parse first Answer RR: %s.\n",
+		               knot_strerror(ret));
+		knot_packet_free(&packet);
+		/*! \todo Cleanup. */
+		return KNOT_EMALF;
+	}
+
+	if (rr == NULL) {
+		dbg_xfrin("No RRs in the packet.\n");
+		knot_packet_free(&packet);
+		/*! \todo Cleanup. */
+		return KNOT_EMALF;
+	}
+
+	/*! \todo We should probably test whether the Question of the first
+	 *        message corresponds to the SOA RR.
+	 */
+
+	knot_node_t *node = NULL;
+	int in_zone = 0;
+	knot_zone_contents_t *zone = NULL;
+
+	if (*constr == NULL) {
+		// this should be the first packet
+		/*! \note [TSIG] Packet number for checking TSIG validation. */
+		xfr->packet_nr = 0;
+		/*! \note [TSIG] Storing total size of data for TSIG digest. */
+		xfr->tsig_data_size = 0;
+		
+		// create new zone
+		/*! \todo Ensure that the packet is the first one. */
+		if (knot_rrset_type(rr) != KNOT_RRTYPE_SOA) {
+			dbg_xfrin("No zone created, but the first RR in "
+			               "Answer is not a SOA RR.\n");
+			knot_packet_free(&packet);
+			knot_node_free(&node, 0, 0);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			/*! \todo Cleanup. */
+			return KNOT_EMALF;
+		}
+
+		if (knot_dname_compare(knot_rrset_owner(rr),
+		                       knot_packet_qname(packet)) != 0) {
+dbg_xfrin_exec(
+			char *rr_owner =
+				knot_dname_to_str(knot_rrset_owner(rr));
+			char *qname = knot_dname_to_str(
+				knot_packet_qname(packet));
+
+			dbg_xfrin("Owner of the first SOA RR (%s) does not"
+			          " match QNAME (%s).\n", rr_owner, qname);
+
+			free(rr_owner);
+			free(qname);
+);
+			/*! \todo Cleanup. */
+			knot_packet_free(&packet);
+			knot_node_free(&node, 0, 0);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			return KNOT_EMALF;
+		}
+
+		node = knot_node_new(rr->owner, NULL, 0);
+		if (node == NULL) {
+			dbg_xfrin("Failed to create new node.\n");
+			knot_packet_free(&packet);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			return KNOT_ENOMEM;
+		}
+
+		// the first RR is SOA and its owner and QNAME are the same
+		// create the zone
+		
+		*constr = (xfrin_constructed_zone_t *)malloc(
+				sizeof(xfrin_constructed_zone_t));
+		if (*constr == NULL) {
+			dbg_xfrin("Failed to create new constr. zone.\n");
+			knot_packet_free(&packet);
+			knot_node_free(&node, 0, 0);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			return KNOT_ENOMEM;
+		}
+		
+		memset(*constr, 0, sizeof(xfrin_constructed_zone_t));
+		
+		(*constr)->contents = knot_zone_contents_new(node, 0, 1, NULL);
+//		assert(0);
+		if ((*constr)->contents== NULL) {
+			dbg_xfrin("Failed to create new zone.\n");
+			knot_packet_free(&packet);
+			knot_node_free(&node, 0, 0);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			/*! \todo Cleanup. */
+			return KNOT_ENOMEM;
+		}
+
+		in_zone = 1;
+		assert(node->owner == rr->owner);
+		zone = (*constr)->contents;
+		assert(zone->apex == node);
+		assert(zone->apex->owner == rr->owner);
+		// add the RRSet to the node
+		//ret = knot_node_add_rrset(node, rr, 0);
+		ret = knot_zone_contents_add_rrset(zone, rr, &node,
+		                                    KNOT_RRSET_DUPL_MERGE, 1);
+		if (ret < 0) {
+			dbg_xfrin("Failed to add RRSet to zone node: %s.\n",
+			          knot_strerror(ret));
+			knot_packet_free(&packet);
+			knot_node_free(&node, 0, 0);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			/*! \todo Cleanup. */
+			return KNOT_ERROR;
+		} else if (ret > 0) {
+			dbg_xfrin("Merged SOA RRSet.\n");
+			// merged, free the RRSet
+			//knot_rrset_deep_free(&rr, 1, 0, 0);
+			knot_rrset_free(&rr);
+		}
+
+		// take next RR
+		ret = knot_packet_parse_next_rr_answer(packet, &rr);
+	} else {
+		zone = (*constr)->contents;
+		++xfr->packet_nr;
+	}
+	
+	/*! \note [TSIG] add the packet wire size to the data to be verified by 
+	 *               TSIG 
+	 */
+	if (xfr->tsig_key) {
+		dbg_xfrin("Adding packet wire to TSIG data (size till now: %zu,"
+		          " adding: %zu).\n", xfr->tsig_data_size, 
+		          xfr->wire_size);
+		assert(KNOT_NS_TSIG_DATA_MAX_SIZE - xfr->tsig_data_size
+		       >= xfr->wire_size);
+		memcpy(xfr->tsig_data + xfr->tsig_data_size, xfr->wire, 
+		       xfr->wire_size);
+		xfr->tsig_data_size += xfr->wire_size;
+	}
+	
+	assert(zone != NULL);
+
+	while (ret == KNOT_EOK && rr != NULL) {
+		// process the parsed RR
+
+		dbg_xfrin("\nNext RR:\n\n");
+		knot_rrset_dump(rr, 0);
+
+		if (node != NULL
+		    && knot_dname_compare(rr->owner, node->owner) != 0) {
+dbg_xfrin_exec(
+			char *name = knot_dname_to_str(node->owner);
+			dbg_xfrin("Node owner: %s\n", name);
+			free(name);
+);
+			if (!in_zone) {
+				// this should not happen
+				assert(0);
+				// the node is not in the zone and the RR has
+				// other owner, so a new node must be created
+				// insert the old node to the zone
+			}
+
+			node = NULL;
+		}
+
+		if (knot_rrset_type(rr) == KNOT_RRTYPE_SOA) {
+			// this must be the last SOA, do not do anything more
+			// discard the RR
+			assert(knot_zone_contents_apex((zone)) != NULL);
+			assert(knot_node_rrset(knot_zone_contents_apex((zone)),
+			                       KNOT_RRTYPE_SOA) != NULL);
+			dbg_xfrin("Found last SOA, transfer finished.\n");
+			
+			dbg_xfrin("Verifying TSIG...\n");
+			/*! \note [TSIG] Now check if there is not a TSIG record
+			 *               at the end of the packet. 
+			 */
+			ret = xfrin_check_tsig(packet, xfr, 1);
+			
+			dbg_xfrin_detail("xfrin_check_tsig() returned %d\n", 
+			                 ret);
+			
+			knot_packet_free(&packet);
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			
+			if (ret != KNOT_EOK) {
+				/*! \todo [TSIG] Handle TSIG errors. */
+				return ret;
+			}
+			
+			// we must now find place for all orphan RRSIGs
+			ret = xfrin_process_orphan_rrsigs(zone, 
+			                                  (*constr)->rrsigs);
+			if (ret != KNOT_EOK) {
+				dbg_xfrin("Failed to process orphan "
+				               "RRSIGs\n");
+				/*! \todo Cleanup?? */
+				return ret;
+			}
+			
+			xfrin_free_orphan_rrsigs(&(*constr)->rrsigs);
+			
+			return 1;
+		}
+
+		if (knot_rrset_type(rr) == KNOT_RRTYPE_RRSIG) {
+			// RRSIGs require special handling, as there are no
+			// nodes for them
+			knot_rrset_t *tmp_rrset = NULL;
+			ret = knot_zone_contents_add_rrsigs(zone, rr,
+			         &tmp_rrset, &node, KNOT_RRSET_DUPL_MERGE, 1);
+			if (ret == KNOT_ENONODE || ret == KNOT_ENORRSET) {
+				dbg_xfrin("No node or RRSet for RRSIGs\n");
+				dbg_xfrin("Saving for later insertion.\n");
+				ret = xfrin_add_orphan_rrsig((*constr)->rrsigs, 
+				                             rr);
+				if (ret > 0) {
+					dbg_xfrin("Merged RRSIGs.\n");
+					knot_rrset_free(&rr);
+				} else if (ret != KNOT_EOK) {
+					dbg_xfrin("Failed to save orphan"
+						       " RRSIGs.\n");
+					knot_packet_free(&packet);
+					knot_node_free(&node, 1, 0); // ???
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					return ret;
+				}
+			} else if (ret < 0) {
+				dbg_xfrin("Failed to add RRSIGs (%s).\n",
+				               knot_strerror(ret));
+				knot_packet_free(&packet);
+				knot_node_free(&node, 1, 0); // ???
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				return KNOT_ERROR;  /*! \todo Other error code. */
+			} else if (ret == 1) {
+				assert(node != NULL);
+dbg_xfrin_exec(
+				char *name = knot_dname_to_str(node->owner);
+				dbg_xfrin("Found node for the record in "
+					       "zone: %s.\n", name);
+				free(name);
+);
+				in_zone = 1;
+				knot_rrset_deep_free(&rr, 1, 0, 0);
+			} else if (ret == 2) {
+				// should not happen
+				assert(0);
+//				knot_rrset_deep_free(&rr, 1, 1, 1);
+			} else {
+				assert(node != NULL);
+dbg_xfrin_exec(
+				char *name = knot_dname_to_str(node->owner);
+				dbg_xfrin("Found node for the record in "
+					       "zone: %s.\n", name);
+				free(name);
+);
+				in_zone = 1;
+				assert(tmp_rrset->rrsigs == rr);
+			}
+
+			// parse next RR
+			ret = knot_packet_parse_next_rr_answer(packet, &rr);
+
+			continue;
+		}
+		
+		/*! \note [TSIG] TSIG where it should not be - in Answer section.*/
+		if (knot_rrset_type(rr) == KNOT_RRTYPE_TSIG) {
+			// not allowed here
+			dbg_xfrin(" in Answer section.\n");
+			knot_packet_free(&packet);
+			knot_node_free(&node, 1, 0); // ???
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			return KNOT_EMALF;
+		}
+
+		knot_node_t *(*get_node)(const knot_zone_contents_t *,
+		                         const knot_dname_t *) = NULL;
+		int (*add_node)(knot_zone_contents_t *, knot_node_t *, int,
+		                uint8_t, int) = NULL;
+
+		if (knot_rrset_type(rr) == KNOT_RRTYPE_NSEC3) {
+			get_node = knot_zone_contents_get_nsec3_node;
+			add_node = knot_zone_contents_add_nsec3_node;
+		} else {
+			get_node = knot_zone_contents_get_node;
+			add_node = knot_zone_contents_add_node;
+		}
+
+		if (node == NULL && (node = get_node(zone,
+		                               knot_rrset_owner(rr))) != NULL) {
+			// the node for this RR was found in the zone
+			dbg_xfrin("Found node for the record in zone.\n");
+			in_zone = 1;
+		}
+
+		if (node == NULL) {
+			// a new node for the RR is required but it is not
+			// in the zone
+			node = knot_node_new(rr->owner, NULL, 0);
+			if (node == NULL) {
+				dbg_xfrin("Failed to create new node.\n");
+				knot_packet_free(&packet);
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				return KNOT_ENOMEM;
+			}
+			dbg_xfrin("Created new node for the record.\n");
+
+			// insert the RRSet to the node
+			ret = knot_node_add_rrset(node, rr, 1);
+			if (ret < 0) {
+				dbg_xfrin("Failed to add RRSet to node (%s"
+				               ")\n", knot_strerror(ret));
+				knot_packet_free(&packet);
+				knot_node_free(&node, 1, 0); // ???
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				return KNOT_ERROR;
+			} else if (ret > 0) {
+				// should not happen, this is new node
+				assert(0);
+//				knot_rrset_deep_free(&rr, 1, 0, 0);
+			}
+
+			// insert the node into the zone
+			ret = add_node(zone, node, 1, 0, 1);
+			assert(node != NULL);
+			if (ret != KNOT_EOK) {
+				dbg_xfrin("Failed to add node to zone (%s)"
+				               ".\n", knot_strerror(ret));
+				knot_packet_free(&packet);
+				knot_node_free(&node, 1, 0); // ???
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				return KNOT_ERROR;
+			}
+
+			in_zone = 1;
+		} else {
+			assert(in_zone);
+
+			ret = knot_zone_contents_add_rrset(zone, rr, &node,
+			                            KNOT_RRSET_DUPL_MERGE, 1);
+			if (ret < 0) {
+				dbg_xfrin("Failed to add RRSet to zone:"
+				               "%s.\n", knot_strerror(ret));
+				return KNOT_ERROR;
+			} else if (ret > 0) {
+				// merged, free the RRSet
+//				knot_rrset_deep_free(&rr, 1, 0, 0);
+				knot_rrset_free(&rr);
+			}
+
+		}
+
+		rr = NULL;
+
+		// parse next RR
+		ret = knot_packet_parse_next_rr_answer(packet, &rr);
+	}
+
+	assert(ret != KNOT_EOK || rr == NULL);
+
+	if (ret < 0) {
+		// some error in parsing
+		dbg_xfrin("Could not parse next RR: %s.\n",
+		               knot_strerror(ret));
+		knot_packet_free(&packet);
+		knot_node_free(&node, 0, 0);
+		knot_rrset_deep_free(&rr, 1, 1, 1);
+		/*! \todo Cleanup. */
+		return KNOT_EMALF;
+	}
+
+	assert(ret == KNOT_EOK);
+	assert(rr == NULL);
+
+	// if the last node is not yet in the zone, insert
+	if (!in_zone) {
+		assert(node != NULL);
+		ret = knot_zone_contents_add_node(zone, node, 1, 0, 1);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add last node into zone (%s)"
+			               ".\n", knot_strerror(ret));
+			knot_packet_free(&packet);
+			knot_node_free(&node, 1, 0);
+			return KNOT_ERROR;	/*! \todo Other error */
+		}
+	}
+	
+	/*! \note [TSIG] Now check if there is not a TSIG record at the end of
+	 *               the packet. 
+	 */
+	ret = xfrin_check_tsig(packet, xfr, 
+	                       knot_ns_tsig_required(xfr->packet_nr));
+	++xfr->packet_nr;
+	
+	knot_packet_free(&packet);
+	dbg_xfrin("Processed one AXFR packet successfully.\n");
+	
+	/*! \note [TSIG] TSIG errors are propagated and reported in a standard 
+	 * manner, as we're in response processing, no further error response 
+	 * should be sent. 
+	 */
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_parse_first_rr(knot_packet_t **packet, const uint8_t *pkt,
+                                size_t size, knot_rrset_t **rr)
+{
+	*packet = knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	if (packet == NULL) {
+		dbg_xfrin("Could not create packet structure.\n");
+		return KNOT_ENOMEM;
+	}
+
+	int ret = knot_packet_parse_from_wire(*packet, pkt, size, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Could not parse packet: %s.\n",
+		               knot_strerror(ret));
+		knot_packet_free(packet);
+		return KNOT_EMALF;
+	}
+	
+	// check if the TC bit is set (it must not be)
+	if (knot_wire_get_tc(pkt)) {
+		dbg_xfrin("IXFR response has TC bit set.\n");
+		knot_packet_free(packet);
+		return KNOT_EMALF;
+	}
+
+	ret = knot_packet_parse_next_rr_answer(*packet, rr);
+
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Could not parse first Answer RR: %s.\n",
+		          knot_strerror(ret));
+		knot_packet_free(packet);
+		return KNOT_EMALF;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_process_ixfr_packet(/*const uint8_t *pkt, size_t size,
+                              knot_changesets_t **chs*/knot_ns_xfr_t *xfr)
+{
+	size_t size = xfr->wire_size;
+	const uint8_t *pkt = xfr->wire;
+	knot_changesets_t **chs = (knot_changesets_t **)(&xfr->data);
+	
+	if (pkt == NULL || chs == NULL) {
+		dbg_xfrin("Wrong parameters supported.\n");
+		return KNOT_EBADARG;
+	}
+	
+	// check if the response is OK
+	if (knot_wire_get_rcode(pkt) != KNOT_RCODE_NOERROR) {
+		return KNOT_EXFRREFUSED;
+	}
+
+	knot_packet_t *packet = NULL;
+//	knot_rrset_t *soa1 = NULL;
+//	knot_rrset_t *soa2 = NULL;
+	knot_rrset_t *rr = NULL;
+
+	int ret;
+	
+	if ((ret = xfrin_parse_first_rr(&packet, pkt, size, &rr)) != KNOT_EOK) {
+		return ret;
+	}
+
+	assert(packet != NULL);
+	
+	// state of the transfer
+	// -1 .. a SOA is expected to create a new changeset
+	int state = 0;
+
+	if (rr == NULL) {
+		dbg_xfrin("No RRs in the packet.\n");
+		knot_packet_free(&packet);
+		/*! \todo Some other action??? */
+		return KNOT_EMALF;
+	}
+	
+	if (*chs == NULL) {
+		dbg_xfrin("Changesets empty, creating new.\n");
+		
+		ret = knot_changeset_allocate(chs);
+		if (ret != KNOT_EOK) {
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			knot_packet_free(&packet);
+			return ret;
+		}
+		
+		// the first RR must be a SOA
+		if (knot_rrset_type(rr) != KNOT_RRTYPE_SOA) {
+			dbg_xfrin("First RR is not a SOA RR!\n");
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			ret = KNOT_EMALF;
+			goto cleanup;
+		}
+		
+		// just store the first SOA for later use
+		(*chs)->first_soa = rr;
+		state = -1;
+		
+		dbg_xfrin("First SOA of IXFR saved, state set to -1.\n");
+		
+		// parse the next one
+		ret = knot_packet_parse_next_rr_answer(packet, &rr);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+		
+		/*
+		 * If there is no other records in the response than the SOA, it
+		 * means one of these two cases:
+		 *
+		 * 1) The server does not have newer zone than ours.
+		 *    This is indicated by serial equal to the one of our zone.
+		 * 2) The server wants to send the transfer but is unable to fit
+		 *    it in the packet. This is indicated by serial different 
+		 *    (newer) from the one of our zone. 
+		 *
+		 * The serials must be compared in other parts of the server, so
+		 * just indicate that the answer contains only one SOA.
+		 */
+		if (rr == NULL) {
+			dbg_xfrin("Response containing only SOA,\n");
+			knot_packet_free(&packet);
+			return XFRIN_RES_SOA_ONLY;
+		} else if (knot_rrset_type(rr) != KNOT_RRTYPE_SOA) {
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			dbg_xfrin("Fallback to AXFR.\n");
+			ret = XFRIN_RES_FALLBACK;
+			knot_free_changesets(chs);
+			xfr->data = 0;
+			return ret;
+		}
+	} else {
+		if ((*chs)->first_soa == NULL) {
+			dbg_xfrin("Changesets don't contain frist SOA!\n");
+			ret = KNOT_EBADARG;
+			goto cleanup;
+		}
+		dbg_xfrin("Changesets present.\n");
+	}
+
+	/*
+	 * Process the next RR. Different requirements are in place in 
+	 * different cases:
+	 *
+	 * 1) Last changeset has both soa_from and soa_to.
+	 *    a) The next RR is a SOA.
+	 *      i) The next RR is equal to the first_soa saved in changesets.
+	 *         This denotes the end of the transfer. It may be dropped and
+	 *         the end should be signalised by returning positive value.
+	 *
+	 *      ii) The next RR is some other SOA.
+	 *          This means a start of new changeset - create it and add it 
+	 *          to the list.
+	 *
+	 *    b) The next RR is not a SOA.
+	 *       Put the RR into the ADD part of the last changeset as this is
+	 *       not finished yet. Continue while SOA is not encountered. Then
+	 *       jump to 1-a.
+	 * 
+	 * 2) Last changeset has only the soa_from and does not have soa_to.
+	 *    a) The next RR is a SOA.
+	 *       This means start of the ADD section. Put the SOA to the 
+	 *       changeset. Continue adding RRs to the ADD section while SOA
+	 *       is not encountered. This is identical to 1-b.
+	 *
+	 *    b) The next RR is not a SOA.
+	 *       This means the REMOVE part is not finished yet. Add the RR to
+	 *       the REMOVE part. Continue adding next RRs until a SOA is 
+	 *       encountered. Then jump to 2-a.
+	 */
+	
+	// first, find out in what state we are
+	/*! \todo It would be more elegant to store the state in the 
+	 *        changesets structure, or in some place persistent between
+	 *        calls to this function.
+	 */
+	if (state != -1) {
+		dbg_xfrin("State is not -1, deciding...\n");
+		// there should be at least one started changeset right now
+		if ((*chs)->count <= 0) {
+			knot_rrset_deep_free(&rr, 1, 1, 1);
+			ret = KNOT_EMALF;
+			goto cleanup;
+		}
+		
+		// a changeset should be created only when there is a SOA
+		assert((*chs)->sets[(*chs)->count - 1].soa_from != NULL);
+		
+		if ((*chs)->sets[(*chs)->count - 1].soa_to == NULL) {
+			state = XFRIN_CHANGESET_REMOVE;
+		} else {
+			state = XFRIN_CHANGESET_ADD;
+		}
+	}
+	
+	dbg_xfrin("State before the loop: %d\n", state);
+	
+	/*! \todo This may be implemented with much less IFs! */
+	
+	while (ret == KNOT_EOK && rr != NULL) {
+dbg_xfrin_exec(
+		dbg_xfrin("Next loop, state: %d\n", state);
+		char *name = knot_dname_to_str(knot_rrset_owner(rr));
+		dbg_xfrin("Actual RR: %s, type %s.\n", name, 
+		               knot_rrtype_to_string(knot_rrset_type(rr)));
+		free(name);
+);
+		switch (state) {
+		case -1:
+			// a SOA is expected
+			// this may be either a start of a changeset or the
+			// last SOA (in case the transfer was empty, but that
+			// is quite weird in fact
+			if (knot_rrset_type(rr) != KNOT_RRTYPE_SOA) {
+				dbg_xfrin("First RR is not a SOA RR!\n");
+				dbg_xfrin("RR type: %s\n",
+				    knot_rrtype_to_string(knot_rrset_type(rr)));
+				ret = KNOT_EMALF;
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				goto cleanup;
+			}
+			
+			if (knot_rdata_soa_serial(knot_rrset_rdata(rr))
+			    == knot_rdata_soa_serial(
+			           knot_rrset_rdata((*chs)->first_soa))) {
+				
+				/*! \note [TSIG] Check TSIG, we're at the end of
+				 *               transfer. 
+				 */
+				ret = xfrin_check_tsig(packet, xfr, 1);
+				
+				// last SOA, discard and end
+				knot_rrset_deep_free(&rr, 1, 1, 1);
+				knot_packet_free(&packet);
+				
+				/*! \note [TSIG] If TSIG validates, consider 
+				 *        transfer complete. */
+				if (ret == KNOT_EOK) {
+					ret = XFRIN_RES_COMPLETE;
+				}
+				
+				return ret;
+			} else {
+				// normal SOA, start new changeset
+				(*chs)->count++;
+				if ((ret = knot_changesets_check_size(*chs))
+				     != KNOT_EOK) {
+					(*chs)->count--;
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					goto cleanup;
+				}
+						
+				ret = knot_changeset_add_soa(
+					&(*chs)->sets[(*chs)->count - 1], rr, 
+					XFRIN_CHANGESET_REMOVE);
+				if (ret != KNOT_EOK) {
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					goto cleanup;
+				}
+				
+				// change state to REMOVE
+				state = XFRIN_CHANGESET_REMOVE;
+			}
+			break;
+		case XFRIN_CHANGESET_REMOVE:
+			// if the next RR is SOA, store it and change state to
+			// ADD
+			if (knot_rrset_type(rr) == KNOT_RRTYPE_SOA) {
+				// we should not be here if soa_from is not set
+				assert((*chs)->sets[(*chs)->count - 1].soa_from
+				       != NULL);
+				
+				ret = knot_changeset_add_soa(
+					&(*chs)->sets[(*chs)->count - 1], rr, 
+					XFRIN_CHANGESET_ADD);
+				if (ret != KNOT_EOK) {
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					goto cleanup;
+				}
+				
+				state = XFRIN_CHANGESET_ADD;
+			} else {
+				// just add the RR to the REMOVE part and
+				// continue
+				if ((ret = knot_changeset_add_new_rr(
+				         &(*chs)->sets[(*chs)->count - 1], rr,
+				         XFRIN_CHANGESET_REMOVE)) != KNOT_EOK) {
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					goto cleanup;
+				}
+			}
+			break;
+		case XFRIN_CHANGESET_ADD:
+			// if the next RR is SOA change to state -1 and do not
+			// parse next RR
+			if (knot_rrset_type(rr) == KNOT_RRTYPE_SOA) {
+				state = -1;
+				continue;
+			} else {
+				
+				// just add the RR to the ADD part and continue
+				if ((ret = knot_changeset_add_new_rr(
+				            &(*chs)->sets[(*chs)->count - 1], rr,
+				            XFRIN_CHANGESET_ADD)) != KNOT_EOK) {
+					knot_rrset_deep_free(&rr, 1, 1, 1);
+					goto cleanup;
+				}
+			}
+			break;
+		default:
+			assert(0);
+		}
+		
+		// parse the next RR
+		dbg_xfrin("Parsing next RR..\n");
+		ret = knot_packet_parse_next_rr_answer(packet, &rr);
+		dbg_xfrin("Returned %d, %p.\n", ret, rr);
+	}
+	
+	/*! \note Check TSIG, we're at the end of packet. It may not be 
+	 *        required. 
+	 */
+	ret = xfrin_check_tsig(packet, xfr, 
+	                       knot_ns_tsig_required(xfr->packet_nr));
+	dbg_xfrin_detail("xfrin_check_tsig() returned %d\n", ret);
+	++xfr->packet_nr;
+	
+	/*! \note [TSIG] Cleanup and propagate error if TSIG validation fails.*/
+	if (ret != KNOT_EOK) {
+		goto cleanup;
+	}
+	
+	// here no RRs remain in the packet but the transfer is not finished
+	// yet, return EOK
+	knot_packet_free(&packet);
+	return KNOT_EOK;
+
+cleanup:
+	/* We should go here only if some error occured. */
+	assert(ret < 0);
+	
+	dbg_xfrin("Cleanup after processing IXFR/IN packet.\n");
+	knot_free_changesets(chs);
+	knot_packet_free(&packet);
+	xfr->data = 0;
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+/* Applying changesets to zone                                                */
+/*----------------------------------------------------------------------------*/
+
+typedef struct {
+	/*!
+	 * Deleted (without owners and RDATA) after successful update.
+	 */
+	knot_rrset_t **old_rrsets;
+	int old_rrsets_count;
+	int old_rrsets_allocated;
+
+	/*!
+	 * Deleted after successful update.
+	 */
+	knot_rdata_t **old_rdata;
+	uint *old_rdata_types;
+	int old_rdata_count;
+	int old_rdata_allocated;
+
+	/*!
+	 * \brief Copied RRSets (i.e. modified by the update).
+	 *
+	 * Deleted (without owners and RDATA) after failed update.
+	 */
+	knot_rrset_t **new_rrsets;
+	int new_rrsets_count;
+	int new_rrsets_allocated;
+
+	/*!
+	 * Deleted (without contents) after successful update.
+	 */
+	knot_node_t **old_nodes;
+	int old_nodes_count;
+	int old_nodes_allocated;
+
+	/*!
+	 * Deleted (without contents) after failed update.
+	 */
+	knot_node_t **new_nodes;
+	int new_nodes_count;
+	int new_nodes_allocated;
+	
+	ck_hash_table_item_t **old_hash_items;
+	int old_hash_items_count;
+	int old_hash_items_allocated;
+} xfrin_changes_t;
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_changes_free(xfrin_changes_t **changes)
+{
+	free((*changes)->old_nodes);
+	free((*changes)->old_rrsets);
+	free((*changes)->old_rdata);
+	free((*changes)->old_rdata_types);
+	free((*changes)->new_rrsets);
+	free((*changes)->new_nodes);
+	free((*changes)->old_hash_items);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_changes_check_rrsets(knot_rrset_t ***rrsets,
+                                      int *count, int *allocated, int to_add)
+{
+	/* Ensure at least requested size is allocated. */
+	int new_count = (*count + to_add);
+	assert(new_count >= 0);
+	if (new_count <= *allocated) {
+		return KNOT_EOK;
+	}
+
+	/* Allocate new memory block. */
+	knot_rrset_t **rrsets_new = malloc(new_count * sizeof(knot_rrset_t *));
+	if (rrsets_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Initialize new memory and copy old data. */
+	memset(rrsets_new, 0, new_count * sizeof(knot_rrset_t *));
+	memcpy(rrsets_new, *rrsets, (*allocated) * sizeof(knot_rrset_t *));
+
+	/* Free old nodes and switch pointers. */
+	free(*rrsets);
+	*rrsets = rrsets_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_changes_check_nodes(knot_node_t ***nodes,
+                                     int *count, int *allocated)
+{
+	assert(nodes != NULL);
+	assert(count != NULL);
+	assert(allocated != 0);
+
+	/* Ensure at least count and some reserve is allocated. */
+	int new_count = *count + 2;
+	if (new_count <= *allocated) {
+		return KNOT_EOK;
+	}
+
+	/* Allocate new memory block. */
+	const size_t node_len = sizeof(knot_node_t *);
+	knot_node_t **nodes_new = malloc(new_count * node_len);
+	if (nodes_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Clear memory block and copy old data. */
+	memset(nodes_new, 0, new_count * node_len);
+	memcpy(nodes_new, *nodes, (*allocated) * node_len);
+
+	/* Free old nodes and switch pointers. */
+	free(*nodes);
+	*nodes = nodes_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_changes_check_rdata(knot_rdata_t ***rdatas, uint **types,
+                                     int count, int *allocated, int to_add)
+{
+	/* Ensure at least requested size is allocated. */
+	int new_count = (count + to_add);
+	assert(new_count >= 0);
+	if (new_count <= *allocated) {
+		return KNOT_EOK;
+	}
+
+	/* Allocate new memory block. */
+	knot_rdata_t **rdatas_new = malloc(new_count * sizeof(knot_rdata_t *));
+	if (rdatas_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	uint *types_new = malloc(new_count * sizeof(uint));
+	if (types_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Initialize new memory and copy old data. */
+	memset(rdatas_new, 0, new_count * sizeof(knot_rdata_t *));
+	memcpy(rdatas_new, *rdatas, (*allocated) * sizeof(knot_rdata_t *));
+
+	memset(types_new, 0, new_count * sizeof(uint));
+	memcpy(types_new, *types, (*allocated) * sizeof(uint));
+
+	/* Free old rdatas and switch pointers. */
+	free(*rdatas);
+	free(*types);
+	*rdatas = rdatas_new;
+	*types = types_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_changes_check_hash_items(ck_hash_table_item_t ***items,
+                                          int *count, int *allocated)
+{
+	/* Prevent infinite loop in case of allocated = 0. */
+	int new_count = 0;
+	if (*allocated == 0) {
+		new_count = *count + 1;
+	} else {
+		if (*count == *allocated) {
+			new_count = *allocated * 2;
+		}
+	}
+
+	const size_t item_len = sizeof(ck_hash_table_item_t *);
+	ck_hash_table_item_t **items_new = malloc(new_count * item_len);
+	if (items_new == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	memset(items_new, 0, new_count * item_len);
+	memcpy(items_new, *items, (*count) * item_len);
+	free(*items);
+	*items = items_new;
+	*allocated = new_count;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_zone_contents_free(knot_zone_contents_t **contents)
+{
+	/*! \todo This should be all in some API!! */
+	
+	if ((*contents)->table != NULL) {
+//		ck_destroy_table(&(*contents)->table, NULL, 0);
+		ck_table_free(&(*contents)->table);
+	}
+
+	// free the zone tree, but only the structure
+	// (nodes are already destroyed)
+	dbg_zone("Destroying zone tree.\n");
+	knot_zone_tree_free(&(*contents)->nodes);
+	dbg_zone("Destroying NSEC3 zone tree.\n");
+	knot_zone_tree_free(&(*contents)->nsec3_nodes);
+
+	knot_nsec3_params_free(&(*contents)->nsec3_params);
+
+	knot_dname_table_deep_free(&(*contents)->dname_table);
+	
+	free(*contents);
+	*contents = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_rollback_update(knot_zone_contents_t *contents,
+                                  xfrin_changes_t *changes)
+{
+	/*
+	 * This function is called only when no references were actually set to
+	 * the new nodes, just the new nodes reference other.
+	 * We thus do not need to fix any references, just from the old nodes
+	 * to the new ones.
+	 */
+
+	// discard new nodes, but do not remove RRSets from them
+	for (int i = 0; i < changes->new_nodes_count; ++i) {
+		knot_node_free(&changes->new_nodes[i], 0, 0);
+	}
+
+	// set references from old nodes to new nodes to NULL and remove the
+	// old flag
+	for (int i = 0; i < changes->old_nodes_count; ++i) {
+		knot_node_set_new_node(changes->old_nodes[i], NULL);
+		knot_node_clear_old(changes->old_nodes[i]);
+	}
+
+	// discard new RRSets
+	for (int i = 0; i < changes->old_rrsets_count; ++i) {
+		knot_rrset_deep_free(&changes->new_rrsets[i], 0, 1, 0);
+	}
+
+	// destroy the shallow copy of zone
+	xfrin_zone_contents_free(&contents);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static knot_rdata_t *xfrin_remove_rdata(knot_rrset_t *from,
+                                        const knot_rrset_t *what)
+{
+	knot_rdata_t *old = NULL;
+	knot_rdata_t *old_actual = NULL;
+
+	const knot_rdata_t *rdata = knot_rrset_rdata(what);
+
+	while (rdata != NULL) {
+		old_actual = knot_rrset_remove_rdata(from, rdata);
+		if (old_actual != NULL) {
+			old_actual->next = old;
+			old = old_actual;
+		}
+		rdata = knot_rrset_rdata_next(what, rdata);
+	}
+
+	return old;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_get_node_copy(knot_node_t **node, xfrin_changes_t *changes)
+{
+	knot_node_t *new_node =
+		knot_node_get_new_node(*node);
+	if (new_node == NULL) {
+		dbg_xfrin("Creating copy of node.\n");
+		int ret = knot_node_shallow_copy(*node, &new_node);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to create node copy.\n");
+			return KNOT_ENOMEM;
+		}
+		
+		dbg_xfrin_detail("Created copy of old node %p to new node %p\n",
+		                 *node, new_node);
+
+		assert(changes);
+
+//		changes->new_nodes_allocated = 0;
+
+		// save the copy of the node
+		ret = xfrin_changes_check_nodes(
+			&changes->new_nodes,
+			&changes->new_nodes_count,
+			&changes->new_nodes_allocated);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add new node to list.\n");
+			knot_node_free(&new_node, 0, 0);
+			return ret;
+		}
+
+//		changes->old_nodes_allocated = 0;
+
+		// save the old node to list of old nodes
+		ret = xfrin_changes_check_nodes(
+			&changes->old_nodes,
+			&changes->old_nodes_count,
+			&changes->old_nodes_allocated);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add old node to list.\n");
+			knot_node_free(&new_node, 0, 0);
+			return ret;
+		}
+
+		assert(changes->new_nodes);
+		assert(changes->old_nodes);
+
+		changes->new_nodes[changes->new_nodes_count++] = new_node;
+		changes->old_nodes[changes->old_nodes_count++] = *node;
+
+		// mark the old node as old
+		knot_node_set_old(*node);
+
+		knot_node_set_new(new_node);
+		knot_node_set_new_node(*node, new_node);
+	}
+
+	*node = new_node;
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_copy_old_rrset(knot_rrset_t *old, knot_rrset_t **copy,
+                                xfrin_changes_t *changes)
+{
+	// create new RRSet by copying the old one
+	int ret = knot_rrset_shallow_copy(old, copy);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to create RRSet copy.\n");
+		return KNOT_ENOMEM;
+	}
+
+	// add the RRSet to the list of new RRSets
+	ret = xfrin_changes_check_rrsets(&changes->new_rrsets,
+	                                 &changes->new_rrsets_count,
+	                                 &changes->new_rrsets_allocated, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add new RRSet to list.\n");
+		knot_rrset_free(copy);
+		return ret;
+	}
+
+	changes->new_rrsets[changes->new_rrsets_count++] = *copy;
+
+	// add the old RRSet to the list of old RRSets
+	ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+	                                 &changes->old_rrsets_count,
+	                                 &changes->old_rrsets_allocated, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add old RRSet to list.\n");
+		return ret;
+	}
+
+	changes->old_rrsets[changes->old_rrsets_count++] = old;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_copy_rrset(knot_node_t *node, knot_rr_type_t type,
+                            knot_rrset_t **rrset, xfrin_changes_t *changes)
+{
+	knot_rrset_t *old = knot_node_remove_rrset(node, type);
+
+	if (old == NULL) {
+		dbg_xfrin("RRSet not found for RR to be removed.\n");
+		return 1;
+	}
+
+	int ret = xfrin_copy_old_rrset(old, rrset, changes);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+	
+	dbg_xfrin_detail("Copied old rrset %p to new %p.\n",
+	                 old, *rrset);
+	
+	// replace the RRSet in the node copy by the new one
+	ret = knot_node_add_rrset(node, *rrset, 0);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add RRSet copy to node\n");
+		return KNOT_ERROR;
+	}
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_remove_rrsigs(xfrin_changes_t *changes,
+                                     const knot_rrset_t *remove,
+                                     knot_node_t *node,
+                                     knot_rrset_t **rrset)
+{
+	assert(changes != NULL);
+	assert(remove != NULL);
+	assert(node != NULL);
+	assert(rrset != NULL);
+	assert(knot_rrset_type(remove) == KNOT_RRTYPE_RRSIG);
+	
+	/*! \todo These optimalizations may be useless as there may be only
+	 *        one RRSet of each type and owner in the changeset.
+	 */
+	
+	int ret;
+
+	if (!*rrset
+	    || knot_dname_compare(knot_rrset_owner(*rrset),
+	                            knot_node_owner(node)) != 0
+	    || knot_rrset_type(*rrset) != knot_rdata_rrsig_type_covered(
+	                  knot_rrset_rdata(remove))) {
+		// find RRSet based on the Type Covered
+		knot_rr_type_t type = knot_rdata_rrsig_type_covered(
+			knot_rrset_rdata(remove));
+		
+		// copy the rrset
+		ret = xfrin_copy_rrset(node, type, rrset, changes);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to copy rrset from changeset.\n");
+			return ret;
+		}
+	} else {
+		// we should have the right RRSIG RRSet in *rrset
+		assert(knot_rrset_type(*rrset) 
+		       == knot_rdata_rrsig_type_covered(
+		                 knot_rrset_rdata(remove)));
+		// this RRSet should be the already copied RRSet so we may
+		// update it right away
+	}
+	
+	// get the old rrsigs
+	knot_rrset_t *old = knot_rrset_get_rrsigs(*rrset);
+	if (old == NULL) {
+		return 1;
+	}
+	
+	// copy the RRSIGs
+	/*! \todo This may be done unnecessarily more times. */
+	knot_rrset_t *rrsigs;
+	ret = xfrin_copy_old_rrset(old, &rrsigs, changes);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+	
+	// set the RRSIGs to the new RRSet copy
+	if (knot_rrset_set_rrsigs(*rrset, rrsigs) != KNOT_EOK) {
+		dbg_xfrin("Failed to set rrsigs.\n");
+		return KNOT_ERROR;
+	}
+	
+	
+
+	// now in '*rrset' we have a copy of the RRSet which holds the RRSIGs 
+	// and in 'rrsigs' we have the copy of the RRSIGs
+	
+	knot_rdata_t *rdata = xfrin_remove_rdata(rrsigs, remove);
+	if (rdata == NULL) {
+		dbg_xfrin("Failed to remove RDATA from RRSet: %s.\n",
+		               knot_strerror(ret));
+		return 1;
+	}
+	
+	// if the RRSet is empty, remove from node and add to old RRSets
+	// check if there is no RRSIGs; if there are, leave the RRSet
+	// there; it may be eventually removed when the RRSIGs are removed
+	if (knot_rrset_rdata(rrsigs) == NULL) {
+		// remove the RRSIGs from the RRSet
+		knot_rrset_set_rrsigs(*rrset, NULL);
+		
+		ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+		                                 &changes->old_rrsets_count,
+		                                 &changes->old_rrsets_allocated,
+		                                 1);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add empty RRSet to the "
+			               "list of old RRSets.");
+			// delete the RRSet right away
+			knot_rrset_free(&rrsigs);
+			return ret;
+		}
+	
+		changes->old_rrsets[changes->old_rrsets_count++] = rrsigs;
+		
+		// now check if the RRSet is not totally empty
+		if (knot_rrset_rdata(*rrset) == NULL) {
+			assert(knot_rrset_rrsigs(*rrset) == NULL);
+			
+			// remove the whole RRSet from the node
+			knot_rrset_t *tmp = knot_node_remove_rrset(node,
+			                             knot_rrset_type(*rrset));
+			assert(tmp == *rrset);
+			
+			ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+			                        &changes->old_rrsets_count,
+			                        &changes->old_rrsets_allocated,
+			                        1);
+			if (ret != KNOT_EOK) {
+				dbg_xfrin("Failed to add empty RRSet to "
+				               "the list of old RRSets.");
+				// delete the RRSet right away
+				knot_rrset_free(rrset);
+				return ret;
+			}
+		
+			changes->old_rrsets[changes->old_rrsets_count++] = 
+				*rrset;
+		}
+	}
+	
+	// connect the RDATA to the list of old RDATA
+	ret = xfrin_changes_check_rdata(&changes->old_rdata,
+	                                &changes->old_rdata_types,
+	                                changes->old_rdata_count,
+	                                &changes->old_rdata_allocated, 1);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	changes->old_rdata[changes->old_rdata_count] = rdata;
+	changes->old_rdata_types[changes->old_rdata_count] =
+			knot_rrset_type(remove);
+	++changes->old_rdata_count;
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_remove_normal(xfrin_changes_t *changes,
+                                     const knot_rrset_t *remove,
+                                     knot_node_t *node,
+                                     knot_rrset_t **rrset)
+{
+	assert(changes != NULL);
+	assert(remove != NULL);
+	assert(node != NULL);
+	assert(rrset != NULL);
+	
+	int ret;
+	
+	dbg_xfrin_detail("Removing RRSet: \n");
+	knot_rrset_dump(remove, 0);
+	
+	// now we have the copy of the node, so lets get the right RRSet
+	// check if we do not already have it
+	if (!*rrset
+	    || knot_dname_compare(knot_rrset_owner(*rrset),
+	                          knot_node_owner(node)) != 0
+	    || knot_rrset_type(*rrset)
+	       != knot_rrset_type(remove)) {
+		/*!
+		 * \todo This may happen also with already 
+		 *       copied RRSet. In that case it would be
+		 *       an unnecesary overhead but will 
+		 *       probably not cause problems. TEST!!
+		 */
+		ret = xfrin_copy_rrset(node,
+			knot_rrset_type(remove), rrset, changes);
+		dbg_xfrin_detail("Copied RRSet:\n");
+		knot_rrset_dump(*rrset, 0);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+	
+	if (*rrset == NULL) {
+		dbg_xfrin("RRSet not found for RR to be removed.\n");
+		return 1;
+	}
+	
+dbg_xfrin_exec(
+	char *name = knot_dname_to_str(knot_rrset_owner(*rrset));
+	dbg_xfrin("Updating RRSet with owner %s, type %s\n", name,
+		  knot_rrtype_to_string(knot_rrset_type(*rrset)));
+	free(name);
+);
+
+	// remove the specified RRs from the RRSet (de facto difference of
+	// sets)
+	knot_rdata_t *rdata = xfrin_remove_rdata(*rrset, remove);
+	if (rdata == NULL) {
+		dbg_xfrin("Failed to remove RDATA from RRSet: %s.\n",
+			  knot_strerror(ret));
+		return 1;
+	}
+	
+dbg_xfrin_exec_detail(
+	dbg_xfrin_detail("Removed rdata: \n");
+	knot_rdata_t *r = rdata;
+	if (r != NULL) {
+		do {
+			dbg_xfrin_detail("pointer: %p\n", r);
+			knot_rdata_dump(r, knot_rrset_type(remove), 0);
+			r = r->next;
+		} while (r != NULL && r != rdata);
+	}
+);
+	
+	// if the RRSet is empty, remove from node and add to old RRSets
+	// check if there is no RRSIGs; if there are, leave the RRSet
+	// there; it may be eventually removed when the RRSIGs are removed
+	if (knot_rrset_rdata(*rrset) == NULL
+	    && knot_rrset_rrsigs(*rrset) == NULL) {
+		
+		knot_rrset_t *tmp = knot_node_remove_rrset(node,
+		                                     knot_rrset_type(*rrset));
+		dbg_xfrin_detail("Removed whole RRSet (%p).\n", tmp);
+		
+		// add the removed RRSet to list of old RRSets
+		
+		assert(tmp == *rrset);
+		ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+		                                 &changes->old_rrsets_count,
+		                                 &changes->old_rrsets_allocated,
+		                                 1);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add empty RRSet to the "
+			          "list of old RRSets.");
+			// delete the RRSet right away
+			knot_rrset_free(rrset);
+			return ret;
+		}
+	
+		changes->old_rrsets[changes->old_rrsets_count++] = *rrset;
+	}
+	
+	// connect the RDATA to the list of old RDATA
+	ret = xfrin_changes_check_rdata(&changes->old_rdata,
+	                                &changes->old_rdata_types,
+	                                changes->old_rdata_count,
+	                                &changes->old_rdata_allocated, 1);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	changes->old_rdata[changes->old_rdata_count] = rdata;
+	changes->old_rdata_types[changes->old_rdata_count] =
+			knot_rrset_type(remove);
+	++changes->old_rdata_count;
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_remove_all_rrsets(xfrin_changes_t *changes,
+                                         knot_node_t *node, uint16_t type)
+{
+	/*! \todo Implement. */
+	int ret;
+
+	if (type == KNOT_RRTYPE_ANY) {
+		// put all the RRSets to the changes structure
+		ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+		                                 &changes->old_rrsets_count,
+		                                 &changes->old_rrsets_allocated,
+		                                 knot_node_rrset_count(node));
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to check changeset rrsets.\n");
+			return ret;
+		}
+
+		knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+		knot_rrset_t **place = changes->old_rrsets
+		                       + changes->old_rrsets_count;
+		/*! \todo Test this!!! */
+		memcpy(place, rrsets, knot_node_rrset_count(node) * sizeof(knot_rrset_t *));
+
+		// remove all RRSets from the node
+		knot_node_remove_all_rrsets(node);
+	} else {
+		ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+		                                 &changes->old_rrsets_count,
+		                                 &changes->old_rrsets_allocated,
+		                                 1);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to check changeset rrsets.\n");
+			return ret;
+		}
+		// remove only RRSet with the given type
+		knot_rrset_t *rrset = knot_node_remove_rrset(node, type);
+		changes->old_rrsets[changes->old_rrsets_count++] = rrset;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_remove(knot_zone_contents_t *contents,
+                              knot_changeset_t *chset,
+                              xfrin_changes_t *changes)
+{
+	/*
+	 * Iterate over removed RRSets, copy appropriate nodes and remove
+	 * the rrsets from them. By default, the RRSet should be copied so that
+	 * RDATA may be removed from it.
+	 */
+	int ret = 0;
+	knot_node_t *node = NULL;
+	knot_rrset_t *rrset = NULL;
+
+	for (int i = 0; i < chset->remove_count; ++i) {
+		// check if the old node is not the one we should use
+		if (!node || knot_rrset_owner(chset->remove[i])
+		             != knot_node_owner(node)) {
+			node = knot_zone_contents_get_node(contents,
+			                  knot_rrset_owner(chset->remove[i]));
+			if (node == NULL) {
+				dbg_xfrin("Node not found for RR to be removed"
+				          "!\n");
+				continue;
+			}
+		}
+
+		// create a copy of the node if not already created
+		if (!knot_node_is_new(node)) {
+			ret = xfrin_get_node_copy(&node, changes);
+			if (ret != KNOT_EOK) {
+				return ret;
+			}
+		}
+
+		assert(node != NULL);
+		assert(knot_node_is_new(node));
+		
+		// first check if all RRSets should be removed
+		if (knot_rrset_class(chset->remove[i]) == KNOT_CLASS_ANY) {
+			ret = xfrin_apply_remove_all_rrsets(
+				changes, node,
+				knot_rrset_type(chset->remove[i]));
+		} else if (knot_rrset_type(chset->remove[i])
+		           == KNOT_RRTYPE_RRSIG) {
+			// this should work also for UPDATE
+			ret = xfrin_apply_remove_rrsigs(changes,
+			                                chset->remove[i],
+			                                node, &rrset);
+		} else {
+			// this should work also for UPDATE
+			ret = xfrin_apply_remove_normal(changes,
+			                                chset->remove[i],
+			                                node, &rrset);
+		}
+		
+		dbg_xfrin("xfrin_apply_remove() ret = %d\n", ret);
+		
+		if (ret > 0) {
+			continue;
+		} else if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static knot_node_t *xfrin_add_new_node(knot_zone_contents_t *contents,
+                                       knot_rrset_t *rrset)
+{
+	/*! \todo Why is the function disabled? */
+	//return NULL;
+
+	knot_node_t *node = knot_node_new(knot_rrset_get_owner(rrset),
+	                                  NULL, KNOT_NODE_FLAGS_NEW);
+	if (node == NULL) {
+		dbg_xfrin("Failed to create a new node.\n");
+		return NULL;
+	}
+
+	int ret = 0;
+
+	// insert the node into zone structures and create parents if
+	// necessary
+//	dbg_xfrin("Adding new node to zone. From owner: %s type %s\n",
+//	               knot_dname_to_str(node->owner),
+//	               knot_rrtype_to_string(rrset->type));
+//	getchar();
+	if (knot_rrset_type(rrset) == KNOT_RRTYPE_NSEC3) {
+		ret = knot_zone_contents_add_nsec3_node(contents, node, 1, 0,
+		                                        1);
+	} else {
+		ret = knot_zone_contents_add_node(contents, node, 1,
+		                                  KNOT_NODE_FLAGS_NEW, 1);
+	}
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add new node to zone contents.\n");
+		return NULL;
+	}
+
+	// find previous node and connect the new one to it
+	knot_node_t *prev = NULL;
+	if (knot_rrset_type(rrset) == KNOT_RRTYPE_NSEC3) {
+		prev = knot_zone_contents_get_previous_nsec3(contents,
+		                                       knot_rrset_owner(rrset));
+	} else {
+		prev = knot_zone_contents_get_previous(contents,
+		                                       knot_rrset_owner(rrset));
+	}
+
+	// fix prev and next pointers
+	if (prev != NULL) {
+		knot_node_set_previous(node, prev);
+	}
+
+//	printf("contents owned by: %s (%p)\n",
+//	       knot_dname_to_str(contents->apex->owner),
+//	       contents);
+	assert(contents->zone != NULL);
+	knot_node_set_zone(node, contents->zone);
+
+	return node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_add_normal(xfrin_changes_t *changes,
+                                  knot_rrset_t *add,
+                                  knot_node_t *node,
+                                  knot_rrset_t **rrset)
+{
+	assert(changes != NULL);
+	assert(add != NULL);
+	assert(node != NULL);
+	assert(rrset != NULL);
+
+	int ret;
+
+	dbg_xfrin("applying rrset:\n");
+	knot_rrset_dump(add, 0);
+//	getchar();
+	
+	if (!*rrset
+	    || knot_dname_compare(knot_rrset_owner(*rrset),
+	                          knot_node_owner(node)) != 0
+	    || knot_rrset_type(*rrset)
+	       != knot_rrset_type(add)) {
+		dbg_xfrin("Removing rrset!\n");
+		*rrset = knot_node_remove_rrset(node, knot_rrset_type(add));
+	}
+	
+	dbg_xfrin("Removed RRSet: \n");
+	knot_rrset_dump(*rrset, 1);
+
+	if (*rrset == NULL) {
+dbg_xfrin_exec_verb(
+		char *name = knot_dname_to_str(add->owner);
+		dbg_xfrin_verb("RRSet to be added not found in zone.\n");
+		dbg_xfrin_verb("owner: %s type: %s\n", name,
+		               knot_rrtype_to_string(add->type));
+		free(name);
+);
+//		getchar();
+		// add the RRSet from the changeset to the node
+		/*! \todo What about domain names?? Shouldn't we use the
+		 *        zone-contents' version of this function??
+		 */
+		ret = knot_node_add_rrset(node, add, 0);
+//		ret = knot_zone_contents_add_rrset(node->zone->contents,
+//		                                   rrset, node,
+//		                                   KNOT_RRSET_DUPL_MERGE,
+//		                                   1);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add RRSet to node.\n");
+			return KNOT_ERROR;
+		}
+		return 1; // return 1 to indicate the add RRSet was used
+	}
+
+	knot_rrset_t *old = *rrset;
+
+dbg_xfrin_exec(
+	char *name = knot_dname_to_str(knot_rrset_owner(*rrset));
+	dbg_xfrin("Found RRSet with owner %s, type %s\n", name,
+	          knot_rrtype_to_string(knot_rrset_type(*rrset)));
+	free(name);
+);
+	knot_rrset_dump(*rrset, 1);
+	ret = xfrin_copy_old_rrset(old, rrset, changes);
+	if (ret != KNOT_EOK) {
+		assert(0);
+		return ret;
+	}
+
+//	dbg_xfrin("After copy: Found RRSet with owner %s, type %s\n",
+//	               knot_dname_to_str((*rrset)->owner),
+//	          knot_rrtype_to_string(knot_rrset_type(*rrset)));
+
+	// merge the changeset RRSet to the copy
+	/* What if the update fails?
+	 * The changesets will be destroyed - that will destroy 'add',
+	 * and the copied RRSet will be destroyed because it is in the new
+	 * rrsets list.
+	 *
+	 * If the update is successfull, the old RRSet will be destroyed,
+	 * but the one from the changeset will be not!!
+	 *
+	 * TODO: add the 'add' rrset to list of old RRSets?
+	 */
+	dbg_xfrin("Merging RRSets with owners: %s %s types: %d %d\n",
+	       (*rrset)->owner->name, add->owner->name, (*rrset)->type,
+	                add->type);
+	dbg_xfrin_detail("RDATA in RRSet1: %p, RDATA in RRSet2: %p\n", 
+	                 (*rrset)->rdata, add->rdata);
+	ret = knot_rrset_merge((void **)rrset, (void **)&add);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to merge changeset RRSet to copy.\n");
+		return KNOT_ERROR;
+	}
+	dbg_xfrin("Merge returned: %d\n", ret);
+	knot_rrset_dump(*rrset, 1);
+	ret = knot_node_add_rrset(node, *rrset, 0);
+
+	// return 2 so that the add RRSet is removed from
+	// the changeset (and thus not deleted)
+	// and put to list of new RRSets (is this ok?)
+	// and deleted
+	return 2;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_add_rrsig(xfrin_changes_t *changes,
+                                  knot_rrset_t *add,
+                                  knot_node_t *node,
+                                  knot_rrset_t **rrset)
+{
+	assert(changes != NULL);
+	assert(add != NULL);
+	assert(node != NULL);
+	assert(rrset != NULL);
+	assert(knot_rrset_type(add) == KNOT_RRTYPE_RRSIG);
+	
+	int ret;
+	
+	knot_rr_type_t type = knot_rdata_rrsig_type_covered(
+	                                               knot_rrset_rdata(add));
+	
+	if (!*rrset
+	    || knot_dname_compare(knot_rrset_owner(*rrset),
+	                          knot_node_owner(node)) != 0
+	    || knot_rrset_type(*rrset) != knot_rdata_rrsig_type_covered(
+	                                             knot_rrset_rdata(add))) {
+		// copy the rrset
+		ret = xfrin_copy_rrset(node, type, rrset, changes);
+		if (ret < 0) {
+			return ret;
+		}
+	} else {
+		// we should have the right RRSIG RRSet in *rrset
+		assert(knot_rrset_type(*rrset) == type);
+		// this RRSet should be the already copied RRSet so we may
+		// update it right away
+	}
+
+	if (*rrset == NULL) {
+		dbg_xfrin("RRSet to be added not found in zone.\n");
+		
+		// create a new RRSet to add the RRSIGs into
+		*rrset = knot_rrset_new(knot_node_get_owner(node), type,
+		                        knot_rrset_class(add),
+		                        knot_rrset_ttl(add));
+		if (*rrset == NULL) {
+			dbg_xfrin("Failed to create new RRSet for RRSIGs.\n");
+			return KNOT_ENOMEM;
+		}
+		
+		// add the RRSet from the changeset to the node
+		ret = knot_node_add_rrset(node, *rrset, 0);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add RRSet to node.\n");
+			return KNOT_ERROR;
+		}
+	}
+
+dbg_xfrin_exec(
+		char *name = knot_dname_to_str(knot_rrset_owner(*rrset));
+		dbg_xfrin("Found RRSet with owner %s, type %s\n", name,
+			  knot_rrtype_to_string(knot_rrset_type(*rrset)));
+		free(name);
+);
+
+	if (knot_rrset_rrsigs(*rrset) == NULL) {
+		ret = knot_rrset_set_rrsigs(*rrset, add);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to add RRSIGs to the RRSet.\n");
+			return KNOT_ERROR;
+		}
+		
+		return 1;
+	} else {
+		knot_rrset_t *old = knot_rrset_get_rrsigs(*rrset);
+		assert(old != NULL);
+		knot_rrset_t *rrsig;
+		
+		ret = xfrin_copy_old_rrset(old, &rrsig, changes);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+		
+		// replace the old RRSIGs with the new ones
+		knot_rrset_set_rrsigs(*rrset, rrsig);
+	
+		// merge the changeset RRSet to the copy
+		/*! \todo What if the update fails?
+		 * 
+		 */
+		ret = knot_rrset_merge((void **)&rrsig, (void **)&add);
+		if (ret != KNOT_EOK) {
+			dbg_xfrin("Failed to merge changeset RRSet to copy.\n");
+			return KNOT_ERROR;
+		}
+		
+		return 2;
+	}
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_add(knot_zone_contents_t *contents,
+                           knot_changeset_t *chset,
+                           xfrin_changes_t *changes)
+{
+	// iterate over removed RRSets, copy appropriate nodes and remove
+	// the rrsets from them
+	int ret = 0;
+	knot_node_t *node = NULL;
+	knot_rrset_t *rrset = NULL;
+
+	for (int i = 0; i < chset->add_count; ++i) {
+		dbg_xfrin_detail("Adding RRSet:\n");
+		knot_rrset_dump(chset->add[i], 0);
+		// check if the old node is not the one we should use
+		if (!node || knot_rrset_owner(chset->add[i])
+			     != knot_node_owner(node)) {
+			node = knot_zone_contents_get_node(contents,
+			                  knot_rrset_owner(chset->add[i]));
+			if (node == NULL) {
+				// create new node, connect it properly to the
+				// zone nodes
+				dbg_xfrin("Creating new node from.\n");
+				node = xfrin_add_new_node(contents,
+				                          chset->add[i]);
+				if (node == NULL) {
+					dbg_xfrin("Failed to create new node "
+					          "in zone.\n");
+					return KNOT_ERROR;
+				}
+//				continue; // continue with another RRSet
+			}
+		}
+
+		// create a copy of the node if not already created
+		if (!knot_node_is_new(node)) {
+			xfrin_get_node_copy(&node, changes);
+		}
+
+		assert(node != NULL);
+		assert(knot_node_is_new(node));
+		
+		if (knot_rrset_type(chset->add[i]) == KNOT_RRTYPE_RRSIG) {
+			ret = xfrin_apply_add_rrsig(changes, chset->add[i],
+			                            node, &rrset);
+		} else {
+			ret = xfrin_apply_add_normal(changes, chset->add[i],
+			                             node, &rrset);
+		}
+		
+		dbg_xfrin("xfrin_apply_..() returned %d, rrset: %p\n", ret,
+		          rrset);
+		
+		if (ret == 1) {
+			// the ADD RRSet was used, i.e. it should be removed
+			// from the changeset and saved in the list of new
+			// RRSets
+			ret = xfrin_changes_check_rrsets(
+				&changes->new_rrsets,
+				&changes->new_rrsets_count,
+				&changes->new_rrsets_allocated, 1);
+			if (ret != KNOT_EOK) {
+				dbg_xfrin("Failed to add old RRSet to list.\n");
+				return ret;
+			}
+
+			changes->new_rrsets[changes->new_rrsets_count++] =
+					chset->add[i];
+
+			chset->add[i] = NULL;
+		} else if (ret == 2) {
+			// the copy of the RRSet was used, but it was already
+			// stored in the new RRSets list			
+			// just delete the add RRSet, but without RDATA
+			// as these were merged to the copied RRSet
+			knot_rrset_free(&chset->add[i]);
+		} else if (ret != KNOT_EOK) {
+			
+			return ret;
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \todo This must be tested!! Simulate failure somehow.
+ */
+static void xfrin_clean_changes_after_fail(xfrin_changes_t *changes)
+{
+	/* 1) Delete copies of RRSets created because they were updated.
+	 *    Do not delete their RDATA or owners.
+	 */
+	for (int i = 0; i < changes->new_rrsets_count; ++i) {
+		knot_rrset_free(&changes->new_rrsets[i]);
+	}
+
+	/* 2) Delete copies of nodes created because they were updated.
+	 *    Do not delete their RRSets.
+	 */
+	for (int i = 0; i < changes->new_nodes_count; ++i) {
+		knot_node_free(&changes->new_nodes[i], 0, 1);
+	}
+
+	// changesets will be deleted elsewhere
+	// so just delete the changes structure
+	xfrin_changes_free(&changes);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_replace_soa(knot_zone_contents_t *contents,
+                                   xfrin_changes_t *changes,
+                                   knot_changeset_t *chset)
+{
+	knot_node_t *node = knot_zone_contents_get_apex(contents);
+	assert(node != NULL);
+
+	int ret = 0;
+
+	// create a copy of the node if not already created
+	if (!knot_node_is_new(node)) {
+		ret = xfrin_get_node_copy(&node, changes);
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	assert(knot_node_is_new(node));
+	
+	// set the node copy as the apex of the contents
+	contents->apex = node;
+
+	// remove the SOA RRSet from the apex
+	knot_rrset_t *rrset = knot_node_remove_rrset(node, KNOT_RRTYPE_SOA);
+	assert(rrset != NULL);
+
+	// add the old RRSet to the list of old RRSets
+	ret = xfrin_changes_check_rrsets(&changes->old_rrsets,
+	                                 &changes->old_rrsets_count,
+	                                 &changes->old_rrsets_allocated, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add old RRSet to list.\n");
+		return ret;
+	}
+
+	// save also the SOA RDATA, because RDATA are not deleted with the
+	// RRSet
+	ret = xfrin_changes_check_rdata(&changes->old_rdata,
+	                                &changes->old_rdata_types,
+	                                changes->old_rdata_count,
+	                                &changes->old_rdata_allocated, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add old RDATA to list.\n");
+		return ret;
+	}
+
+	// save the SOA to the new RRSet, so that it is deleted if the
+	// apply fails
+	ret = xfrin_changes_check_rrsets(&changes->new_rrsets,
+	                                 &changes->new_rrsets_count,
+	                                 &changes->new_rrsets_allocated, 1);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add old RRSet to list.\n");
+		return ret;
+	}
+
+	changes->old_rrsets[changes->old_rrsets_count++] = rrset;
+
+	/*! \todo Maybe check if the SOA does not have more RDATA? */
+	changes->old_rdata[changes->old_rdata_count] = rrset->rdata;
+	changes->old_rdata_types[changes->old_rdata_count] = KNOT_RRTYPE_SOA;
+	++changes->old_rdata_count;
+
+	// insert the new SOA RRSet to the node
+	dbg_xfrin_verb("Adding SOA.\n");
+	ret = knot_node_add_rrset(node, chset->soa_to, 0);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to add RRSet to node.\n");
+		return KNOT_ERROR;
+	}
+
+	changes->new_rrsets[changes->new_rrsets_count++] = chset->soa_to;
+
+	// remove the SOA from the changeset, so it will not be deleted after
+	// successful apply
+	chset->soa_to = NULL;
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_apply_changeset(knot_zone_contents_t *contents,
+                                 xfrin_changes_t *changes,
+                                 knot_changeset_t *chset)
+{
+	/*
+	 * Applies one changeset to the zone. Checks if the changeset may be
+	 * applied (i.e. the origin SOA (soa_from) has the same serial as
+	 * SOA in the zone apex.
+	 */
+
+	// check if serial matches
+	/*! \todo Only if SOA is present? */
+	const knot_rrset_t *soa = knot_node_rrset(contents->apex,
+	                                          KNOT_RRTYPE_SOA);
+	if (soa == NULL || knot_rdata_soa_serial(knot_rrset_rdata(soa))
+	                   != chset->serial_from) {
+		dbg_xfrin("SOA serials do not match!!\n");
+		return KNOT_ERROR;
+	}
+
+	int ret = xfrin_apply_remove(contents, chset, changes);
+	if (ret != KNOT_EOK) {
+		xfrin_clean_changes_after_fail(changes);
+		return ret;
+	}
+
+	ret = xfrin_apply_add(contents, chset, changes);
+	if (ret != KNOT_EOK) {
+		xfrin_clean_changes_after_fail(changes);
+		return ret;
+	}
+
+	/*! \todo Only if SOA is present? */
+	return xfrin_apply_replace_soa(contents, changes, chset);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_check_node_in_tree(knot_zone_tree_node_t *tnode, void *data)
+{
+	assert(tnode != NULL);
+	assert(data != NULL);
+	assert(tnode->node != NULL);
+	
+	xfrin_changes_t *changes = (xfrin_changes_t *)data;
+
+	knot_node_t *node = knot_node_get_new_node(tnode->node);
+
+	if (node == NULL) {
+		// no RRSets were removed from this node, thus it cannot be
+		// empty
+		return;
+	}
+
+	dbg_xfrin("xfrin_check_node_in_tree: children of old node: %u, "
+		       "children of new node: %u.\n",
+		       knot_node_children(node),
+		       knot_node_children(tnode->node));
+
+	
+	// check if the node is empty and has no children
+	// to be sure, check also the count of children of the old node
+	if (knot_node_rrset_count(node) == 0
+	    && knot_node_children(node) == 0
+	    && knot_node_children(tnode->node) == 0) {
+		// in this case the new node copy should be removed
+		// but it cannot be deleted because if a rollback happens,
+		// the node must be in the new nodes list
+		// just add it to the old nodes list so that it is deleted
+		// after successful update
+
+		// set the new node of the old node to NULL
+		knot_node_set_new_node(tnode->node, NULL);
+		
+		// if the parent has a new copy, decrease the number of
+		// children of that copy
+		if (knot_node_new_node(knot_node_parent(node, 0))) {
+			/*! \todo Replace by some API. */
+			--node->parent->new_node->children;
+		}
+		
+		// put the new node to te list of old nodes
+		if (xfrin_changes_check_nodes(&changes->old_nodes,
+		                              &changes->old_nodes_count,
+		                              &changes->old_nodes_allocated) 
+			!= KNOT_EOK) {
+			/*! \todo Notify about the error!!! */
+			return;
+		}
+		
+		changes->old_nodes[changes->old_nodes_count++] = node;
+		
+		// leave the old node in the old node list, we will delete
+		// it later
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_finalize_remove_nodes(knot_zone_contents_t *contents,
+                                       xfrin_changes_t *changes)
+{
+	assert(contents != NULL);
+	assert(changes != NULL);
+	
+	knot_node_t *node;
+	knot_zone_tree_node_t *removed;
+	ck_hash_table_item_t *rem_hash;
+	int ret;
+	
+	for (int i = 0; i < changes->old_nodes_count; ++i) {
+		node = changes->old_nodes[i];
+
+		// if the node is marked as old and has no new node copy
+		// remove it from the zone structure but do not delete it
+		// that may be done only after the grace period
+		if (knot_node_is_old(node) 
+		    && knot_node_new_node(node) == NULL) {
+		
+			if (knot_node_rrset(node, KNOT_RRTYPE_NSEC3) 
+			    != NULL) {
+				ret = knot_zone_contents_remove_nsec3_node(
+					contents, node, &removed);
+			} else {
+				ret = knot_zone_contents_remove_node(
+					contents, node, &removed, &rem_hash);
+			}
+			if (ret != KNOT_EOK) {
+				dbg_xfrin("Failed to remove node from zone"
+				               "!\n");
+				return KNOT_ENONODE;
+			}
+			
+			assert(removed != NULL);
+			assert(removed->node == node);
+			// delete the tree node (not needed)
+			free(removed);
+			
+			if (rem_hash != NULL) {
+				// save the removed hash table item
+				ret = xfrin_changes_check_hash_items(
+					&changes->old_hash_items,
+					&changes->old_hash_items_count,
+					&changes->old_hash_items_allocated);
+				if (ret != KNOT_EOK) {
+					dbg_xfrin("Failed to save the hash"
+					               " table item to list of "
+					               "old items.\n");
+					return ret;
+				}
+				changes->old_hash_items[
+					changes->old_hash_items_count++]
+					= rem_hash;
+			}
+		}
+	}
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_finalize_contents(knot_zone_contents_t *contents,
+                                   xfrin_changes_t *changes)
+{
+	// don't know what should have been done here, except for one thing:
+	// walk through the zone and remove empty nodes (save them in the
+	// old nodes list). But only those having no children!!!
+	
+	/*
+	 * Walk through the zone and remove empty nodes.
+	 * We must walk backwards, so that children are processed before
+	 * their parents. This will allow to remove chain of parent-children
+	 * nodes.
+	 * We cannot remove the nodes right away as it would modify the very
+	 * structure used for walking through the zone. Just put the nodes
+	 * to the list of old nodes to be removed.
+	 * We must also decrease the node's parent's children count now
+	 * and not when deleting the node, so that the chain of parent-child
+	 * nodes may be removed.
+	 */
+	knot_zone_tree_t *t = knot_zone_contents_get_nodes(contents);
+	assert(t != NULL);
+	
+	// walk through the zone and select nodes to be removed
+	knot_zone_tree_reverse_apply_postorder(t, xfrin_check_node_in_tree, 
+	                                       (void *)changes);
+	
+	// Do the same with NSEC3 nodes.
+	t = knot_zone_contents_get_nsec3_nodes(contents);
+	assert(t != NULL);
+	
+	knot_zone_tree_reverse_apply_postorder(t, xfrin_check_node_in_tree, 
+	                                       (void *)changes);
+	
+	// remove the nodes one by one
+	return xfrin_finalize_remove_nodes(contents, changes);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_fix_refs_in_node(knot_zone_tree_node_t *tnode, void *data)
+{
+	/*! \todo Passed data is always seto to NULL. */
+	assert(tnode != NULL);
+	//assert(data != NULL);
+
+	//xfrin_changes_t *changes = (xfrin_changes_t *)data;
+
+	// 1) Fix the reference to the node to the new one if there is some
+	knot_node_t *node = tnode->node;
+
+	knot_node_t *new_node = knot_node_get_new_node(node);
+	if (new_node != NULL) {
+		//assert(knot_node_rrset_count(new_node) > 0);
+		node = new_node;
+		tnode->node = new_node;
+	}
+
+	// 2) fix references from the node remaining in the zone
+	knot_node_update_refs(node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_fix_gen_in_node(knot_zone_tree_node_t *tnode, void *data)
+{
+	/*! \todo Passed data is always seto to NULL. */
+	assert(tnode != NULL);
+	
+	knot_node_t *node = tnode->node;
+
+	knot_node_set_old(node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_fix_hash_refs(ck_hash_table_item_t *item, void *data)
+{
+	if (item == NULL) {
+		return;
+	}
+	
+	knot_node_t *new_node = knot_node_get_new_node(
+	                             (knot_node_t *)item->value);
+	if (new_node != NULL) {
+		assert(item->key_length
+		       == knot_dname_size(knot_node_owner(new_node)));
+		assert(strncmp(item->key, (const char *)knot_dname_name(
+		            knot_node_owner(new_node)), item->key_length) == 0);
+		item->value = (void *)new_node;
+		item->key = (const char *)knot_dname_name(
+		                             knot_node_owner(new_node));
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_fix_dname_refs(knot_dname_t *dname, void *data)
+{
+	UNUSED(data);
+	knot_dname_update_node(dname);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_fix_references(knot_zone_contents_t *contents)
+{
+	/*! \todo This function must not fail!! */
+
+	/*
+	 * Now the contents are already switched, and we should update all
+	 * references not updated yet, so that the old contents may be removed.
+	 *
+	 * Walk through the zone tree, so that each node will be checked
+	 * and updated.
+	 */
+	// fix references in normal nodes
+	knot_zone_tree_t *tree = knot_zone_contents_get_nodes(contents);
+	knot_zone_tree_forward_apply_inorder(tree, xfrin_fix_refs_in_node,
+	                                     NULL);
+
+	// fix refereces in NSEC3 nodes
+	tree = knot_zone_contents_get_nsec3_nodes(contents);
+	knot_zone_tree_forward_apply_inorder(tree, xfrin_fix_refs_in_node,
+	                                     NULL);
+
+	// fix references in hash table
+	ck_hash_table_t *table = knot_zone_contents_get_hash_table(contents);
+	ck_apply(table, xfrin_fix_hash_refs, NULL);
+	
+	// fix references dname table
+	int ret = knot_zone_contents_dname_table_apply(contents,
+	                                            xfrin_fix_dname_refs, NULL);
+	assert(ret == KNOT_EOK);
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int xfrin_fix_generation(knot_zone_contents_t *contents) 
+{
+	assert(contents != NULL);
+	
+	knot_zone_tree_t *tree = knot_zone_contents_get_nodes(contents);
+	knot_zone_tree_forward_apply_inorder(tree, xfrin_fix_gen_in_node,
+	                                     NULL);
+	
+	tree = knot_zone_contents_get_nsec3_nodes(contents);
+	knot_zone_tree_forward_apply_inorder(tree, xfrin_fix_gen_in_node,
+	                                     NULL);
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void xfrin_cleanup_update(xfrin_changes_t *changes)
+{
+	// free old nodes but do not destroy their RRSets
+	// remove owners also, because of reference counting
+	for (int i = 0; i < changes->old_nodes_count; ++i) {
+		dbg_xfrin_detail("Deleting old node: %p\n", changes->old_nodes[i]);
+		knot_node_dump(changes->old_nodes[i], 0);
+		knot_node_free(&changes->old_nodes[i], 1, 0);
+	}
+
+	// free old RRSets, and destroy also domain names in them
+	// because of reference counting
+
+	// check if there are not some duplicate RRSets
+//	for (int i = 0; i < changes->old_rrsets_count; ++i) {
+//		for (int j = i + 1; j < changes->old_rrsets_count; ++j) {
+//			if (changes->old_rrsets[i] == changes->old_rrsets[j]) {
+//				assert(0);
+//			}
+//			if (changes->old_rrsets[i]->rdata != NULL
+//			    && changes->old_rrsets[i]->rdata
+//			       == changes->old_rrsets[j]->rdata) {
+//				assert(0);
+//			}
+//		}
+//	}
+
+	for (int i = 0; i < changes->old_rrsets_count; ++i) {
+//		knot_rrset_deep_free(&changes->old_rrsets[i], 1, 1, 1);
+		dbg_xfrin_detail("Deleting old RRSet: %p\n", changes->old_rrsets[i]);
+		knot_rrset_dump(changes->old_rrsets[i], 0);
+		knot_rrset_free(&changes->old_rrsets[i]);
+	}
+
+	// delete old RDATA
+	for (int i = 0; i < changes->old_rdata_count; ++i) {
+		dbg_xfrin_detail("Deleting old RDATA: %p, type: %s\n", 
+		                 changes->old_rdata[i],
+		                 knot_rrtype_to_string(changes->old_rdata_types[i]));
+		knot_rdata_dump(changes->old_rdata[i], changes->old_rdata_types[i], 0);
+		knot_rdata_t *rdata = changes->old_rdata[i];
+		assert(rdata != NULL);
+		do {
+			knot_rdata_t *tmp = rdata->next;
+			knot_rdata_deep_free(&rdata, 
+			                     changes->old_rdata_types[i], 1);
+			rdata = tmp;
+		} while (rdata != NULL && rdata != changes->old_rdata[i]);
+		changes->old_rdata[i] = NULL;
+	}
+	
+	// free old hash table items, but do not touch their contents
+	for (int i = 0; i < changes->old_hash_items_count; ++i) {
+		free(changes->old_hash_items[i]);
+	}
+	free(changes->old_hash_items);
+
+	// free allocated arrays of nodes and rrsets
+	free(changes->new_nodes);
+	free(changes->old_nodes);
+	free(changes->new_rrsets);
+	free(changes->old_rrsets);
+	free(changes->old_rdata);
+	free(changes->old_rdata_types);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int xfrin_apply_changesets_to_zone(knot_zone_t *zone, 
+                                   knot_changesets_t *chsets)
+{
+	if (zone == NULL || chsets == NULL || chsets->count == 0) {
+		return KNOT_EBADARG;
+	}
+	
+	knot_zone_contents_t *old_contents = knot_zone_get_contents(zone);
+	if (!old_contents) {
+		return KNOT_EBADARG;
+	}
+	
+//	dbg_xfrin("\nOLD ZONE CONTENTS:\n\n");
+//	knot_zone_contents_dump(old_contents, 1);
+
+	/*
+	 * Ensure that the zone generation is set to 0.
+	 */
+	if (!knot_zone_contents_gen_is_old(old_contents)) {
+		// this would mean that a previous update was not completed
+		// abort
+		dbg_zone("Trying to apply changesets to zone that is "
+		                  "being updated. Aborting.\n");
+		return KNOT_EAGAIN;
+	}
+
+	/*
+	 * Create a shallow copy of the zone, so that the structures may be
+	 * updated.
+	 *
+	 * This will create new zone contents structures (normal nodes' tree,
+	 * NSEC3 tree, hash table, domain name table), but fill them with the
+	 * data from the old contents.
+	 */
+	knot_zone_contents_t *contents_copy = NULL;
+
+	int ret = knot_zone_contents_shallow_copy(old_contents,
+	                                          &contents_copy);
+	if (ret != KNOT_EOK) {
+		dbg_xfrin("Failed to create shallow copy of zone: %s\n",
+		          knot_strerror(ret));
+		return ret;
+	}
+
+	/*
+	 * Now, apply one changeset after another until all are applied.
+	 * Changesets may be either from IXFR or from a dynamic update. 
+	 * Dynamic updates use special TYPE and CLASS values to distinguish
+	 * requests, such as "remove all RRSets from a node", "remove all RRs
+	 * with the specified type from a node", etc.
+	 *
+	 * When updating anything within some node (removing RR, adding RR),
+	 * the node structure is copied, but the RRSets within are not.
+	 *
+	 *   1) When removing RRs from node, The affected RRSet is copied. This
+	 *      it also a 'shallow copy', i.e. the RDATA remain the exact same.
+	 *      The specified RRs (i.e. RDATA) are then removed from the copied
+	 *      RRSet.
+	 *   2) When adding RRs to node, there are two cases:
+	 *      a) If there is a RRSet that should contain these RRs
+	 *         this RRSet is copied (shallow copy) and the RRs are added to
+	 *         it (rrset_merge()).
+	 *      b) If there is not such a RRSet, the whole RRSet from the 
+	 *         changeset is added to the new node (thus this RRSet must not
+	 *         be deleted afterwards).
+	 *
+	 * A special case are RRSIG RRs. These functions assume that they 
+	 * are grouped together in knot_rrset_t structures according to
+	 * their header (owner, type, class) AND their 'type covered', i.e.
+	 * there may be more RRSIG RRSets in one changeset (while there
+	 * should not be more RRSets of any other type).
+	 *   3) When removing RRSIG RRs from node, the appropriate RRSet holding
+	 *      them must be found (according to the 'type covered' field). This
+	 *      RRSet is then copied (shallow copy), Its RRSIGs are also copied
+	 *      and the RRSIG RRs are added to the RRSIG copy.
+	 *   4) When adding RRSIG RRs to node, the same process is done - the 
+	 *      proper RRSet holding them is found, copied, its RRSIGs are
+	 *      copied (if there are some) and the RRs are added to the copy.
+	 *
+	 * When a node is copied, reference to the copy is stored within the
+	 * old node (node_t.old_node). This is important, because when the
+	 * zone contents are switched to the new ones, references from old nodes
+	 * that should point to new nodes are not yet set (it would influence
+	 * replying from the old zone contents). While all these references
+	 * (such as node_t.prev, node_t.next, node_t.parent, etc.) are properly
+	 * modified, the search functions use old or new nodes accordingly
+	 * (old nodes while old contents are used, new nodes when new contents
+	 * are used). The 'check_version' parameter turns on this behaviour in 
+	 * search functions.
+	 *
+	 * In case of error, we must remove all data created by the update, i.e.
+	 *   - new nodes,
+	 *   - new RRSets,
+	 * and remove the references to the new nodes from old nodes.
+	 *
+	 * In case of success, the RRSet structures from the changeset
+	 * structures must not be deleted, as they are either already used by 
+	 * the server (stored within the new zone contents) or deleted when
+	 * cleaning up the temporary 'changes' structure.
+	 */
+	xfrin_changes_t changes;
+	memset(&changes, 0, sizeof(xfrin_changes_t));
+
+	for (int i = 0; i < chsets->count; ++i) {
+		if ((ret = xfrin_apply_changeset(contents_copy, &changes,
+		                               &chsets->sets[i])) != KNOT_EOK) {
+			xfrin_rollback_update(contents_copy, &changes);
+			dbg_xfrin("Failed to apply changesets to zone: "
+			          "%s\n", knot_strerror(ret));
+			return ret;
+		}
+	}
+
+	/*
+	 * When all changesets are applied, set generation 1 to the copy of
+	 * the zone so that new nodes are used instead of old ones.
+	 */
+//	knot_zone_contents_switch_generation(contents_copy);
+	//contents_copy->generation = 1;
+	knot_zone_contents_set_gen_new(contents_copy);
+
+	/*
+	 * Finalize the zone contents.
+	 */
+	ret = xfrin_finalize_contents(contents_copy, &changes);
+	if (ret != KNOT_EOK) {
+		xfrin_rollback_update(contents_copy, &changes);
+		dbg_xfrin("Failed to finalize new zone contents: %s\n",
+		          knot_strerror(ret));
+		return ret;
+	}
+
+	/*
+	 * Switch the zone contents
+	 */
+	knot_zone_contents_t *old =
+		knot_zone_switch_contents(zone, contents_copy);
+	assert(old == old_contents);
+
+	/*
+	 * From now on, the new contents of the zone are being used.
+	 * References to nodes may be updated in the meantime. However, we must
+	 * traverse the zone and fix all references that were not.
+	 */
+	/*! \todo This operation must not fail!!! .*/
+	ret = xfrin_fix_references(contents_copy);
+	assert(ret == KNOT_EOK);
+	
+	// set generation to finished
+	knot_zone_contents_set_gen_new_finished(contents_copy);
+	
+	// set generation of all nodes to the old one
+	// now it is safe (no old nodes should be referenced)
+	ret = xfrin_fix_generation(contents_copy);
+	assert(ret == KNOT_EOK);
+	
+	/* 
+	 * Now we may also set the generation back to 0 so that another 
+	 * update is possible.
+	 */
+	knot_zone_contents_set_gen_old(contents_copy);
+	
+	/*
+	 * Wait until all readers finish reading
+	 */
+	synchronize_rcu();
+
+	/*
+	 * Delete all old and unused data.
+	 */
+	xfrin_zone_contents_free(&old_contents);
+	xfrin_cleanup_update(&changes);
+
+	return KNOT_EOK;
+}
diff --git a/src/libknot/updates/xfr-in.h b/src/libknot/updates/xfr-in.h
new file mode 100644
index 0000000..8a7c64b
--- /dev/null
+++ b/src/libknot/updates/xfr-in.h
@@ -0,0 +1,184 @@
+/*!
+ * \file xfr-in.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief XFR client API.
+ *
+ * \addtogroup query_processing
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_XFR_IN_H_
+#define _KNOT_XFR_IN_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#include "dname.h"
+#include "zone/zone.h"
+#include "packet/packet.h"
+#include "nameserver/name-server.h"
+#include "updates/changesets.h"
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct xfrin_orphan_rrsig {
+	knot_rrset_t *rrsig;
+	struct xfrin_orphan_rrsig *next;
+} xfrin_orphan_rrsig_t;
+
+typedef struct xfrin_constructed_zone {
+	knot_zone_contents_t *contents;
+	xfrin_orphan_rrsig_t *rrsigs;
+} xfrin_constructed_zone_t;
+
+typedef enum xfrin_transfer_result {
+	XFRIN_RES_COMPLETE = 1,
+	XFRIN_RES_SOA_ONLY = 2,
+	XFRIN_RES_FALLBACK = 3
+} xfrin_transfer_result_t;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Creates normal query for the given zone name and the SOA type.
+ *
+ * \param owner Zone owner.
+ * \param buffer Buffer to fill the message in.
+ * \param size In: available space in the buffer. Out: actual size of the
+ *             message in bytes.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ESPACE
+ * \retval KNOT_ERROR
+ */
+int xfrin_create_soa_query(knot_dname_t *owner, knot_ns_xfr_t *xfr,
+                           size_t *size);
+
+/*!
+ * \brief Checks if a zone transfer is required by comparing the zone's SOA with
+ *        the one received from master server.
+ *
+ * \param zone Zone to check.
+ * \param soa_response Response to SOA query received from master server.
+ *
+ * \retval < 0 if an error occured.
+ * \retval 1 if the transfer is needed.
+ * \retval 0 if the transfer is not needed.
+ */
+int xfrin_transfer_needed(const knot_zone_contents_t *zone,
+                          knot_packet_t *soa_response);
+
+/*!
+ * \brief Creates normal query for the given zone name and the AXFR type.
+ *
+ * \param owner Zone owner.
+ * \param xfr Data structure holding important data for the query, namely
+ *            pointer to the buffer for wireformat and TSIG data.
+ * \param size In: available space in the buffer. Out: actual size of the
+ *             message in bytes.
+ * \param use_tsig If TSIG should be used. 
+ *
+ * \todo Parameter use_tsig probably not needed.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ESPACE
+ * \retval KNOT_ERROR
+ */
+int xfrin_create_axfr_query(knot_dname_t *owner, knot_ns_xfr_t *xfr,
+                            size_t *size, int use_tsig);
+
+/*!
+ * \brief Creates normal query for the given zone name and the IXFR type.
+ *
+ * \param zone Zone contents.
+ * \param buffer Buffer to fill the message in.
+ * \param size In: available space in the buffer. Out: actual size of the
+ *             message in bytes.
+ * \param use_tsig If TSIG should be used. 
+ *
+ * \todo Parameter use_tsig probably not needed.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ESPACE
+ * \retval KNOT_ERROR
+ */
+int xfrin_create_ixfr_query(const knot_zone_contents_t *zone, 
+                            knot_ns_xfr_t *xfr, size_t *size, int use_tsig);
+
+/*!
+ * \brief Processes the newly created transferred zone.
+ *
+ * \param nameserver Name server to update.
+ * \param zone Zone build from transfer.
+ *
+ * \retval KNOT_ENOTSUP
+ */
+int xfrin_zone_transferred(knot_nameserver_t *nameserver,
+                           knot_zone_contents_t *zone);
+
+/*!
+ * \brief Processes one incoming packet of AXFR transfer by updating the given
+ *        zone.
+ *
+ * \param pkt Incoming packet in wire format.
+ * \param size Size of the packet in bytes.
+ * \param zone Zone being built. If there is no such zone (i.e. this is the
+ *             first packet, \a *zone may be set to NULL, in which case a new
+ *             zone structure is created).
+ *
+ * \retval KNOT_EOK
+ *
+ * \todo Refactor!!!
+ */
+int xfrin_process_axfr_packet(/*const uint8_t *pkt, size_t size,
+                              xfrin_constructed_zone_t **zone*/
+                              knot_ns_xfr_t *xfr);
+
+/*!
+ * \brief Destroys the whole changesets structure.
+ *
+ * Frees all RRSets present in the changesets and all their data. Also frees
+ * the changesets structure and sets the parameter to NULL.
+ *
+ * \param changesets Changesets to destroy.
+ */
+void xfrin_free_changesets(knot_changesets_t **changesets);
+
+/*!
+ * \brief Parses IXFR reply packet and fills in the changesets structure.
+ *
+ * \param pkt Packet containing the IXFR reply in wire format.
+ * \param size Size of the packet in bytes.
+ * \param changesets Changesets to be filled in.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EINVAL
+ * \retval KNOT_EMALF
+ * \retval KNOT_ENOMEM
+ */
+int xfrin_process_ixfr_packet(knot_ns_xfr_t *xfr/*const uint8_t *pkt, size_t size,
+                              knot_changesets_t **changesets*/);
+
+int xfrin_apply_changesets_to_zone(knot_zone_t *zone, 
+                                   knot_changesets_t *chsets);
+
+#endif /* _KNOTXFR_IN_H_ */
+
+/*! @} */
diff --git a/src/libknot/util/debug.c b/src/libknot/util/debug.c
new file mode 100644
index 0000000..0ca67c9
--- /dev/null
+++ b/src/libknot/util/debug.c
@@ -0,0 +1,233 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "util/utils.h"
+#include "util/debug.h"
+#include "libknot.h"
+#include "common/print.h"
+
+void knot_rdata_dump(knot_rdata_t *rdata, uint32_t type, char loaded_zone)
+{
+#if defined(KNOT_ZONE_DEBUG) || defined(KNOT_RDATA_DEBUG)
+	fprintf(stderr, "      ------- RDATA -------\n");
+	if (rdata == NULL) {
+		fprintf(stderr, "      There are no rdata in this RRset!\n");
+		fprintf(stderr, "      ------- RDATA -------\n");
+		return;
+	}
+	knot_rrtype_descriptor_t *desc = knot_rrtype_descriptor_by_type(type);
+	assert(desc != NULL);
+	char *name;
+
+	for (int i = 0; i < rdata->count; i++) {
+		if (rdata->items[i].raw_data == NULL) {
+			continue;
+		}
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME ) {
+			assert(rdata->items[i].dname != NULL);
+			name = knot_dname_to_str(rdata->items[i].dname);
+			fprintf(stderr, "      DNAME: %d: %s\n",
+			       i, name);
+			free(name);
+			if (loaded_zone) {
+				if (rdata->items[i].dname->node) {
+					name =
+					knot_dname_to_str(rdata->items[i].dname->node->owner);
+					fprintf(stderr, "      Has node owner: %s\n", name);
+					free(name);
+				} else {
+					fprintf(stderr, "      No node set\n");
+				}
+			}
+			fprintf(stderr, "      labels: ");
+			hex_print((char *)rdata->items[i].dname->labels,
+			                 rdata->items[i].dname->label_count);
+
+		} else {
+			assert(rdata->items[i].raw_data != NULL);
+			fprintf(stderr, "      %d: raw_data: length: %d\n", i,
+			       *(rdata->items[i].raw_data));
+			fprintf(stderr, "      ");
+			hex_print(((char *)(
+				rdata->items[i].raw_data + 1)),
+				rdata->items[i].raw_data[0]);
+		}
+	}
+	fprintf(stderr, "      ------- RDATA -------\n");
+#endif
+}
+
+void knot_rrset_dump(const knot_rrset_t *rrset, char loaded_zone)
+{
+#if defined(KNOT_ZONE_DEBUG) || defined(KNOT_RRSET_DEBUG)
+	fprintf(stderr, "  ------- RRSET -------\n");
+	fprintf(stderr, "  %p\n", rrset);
+	if (!rrset) {
+		return;
+	}
+        char *name = knot_dname_to_str(rrset->owner);
+        fprintf(stderr, "  owner: %s\n", name);
+        free(name);
+	fprintf(stderr, "  type: %s\n", knot_rrtype_to_string(rrset->type));
+	fprintf(stderr, "  class: %d\n", rrset->rclass);
+	fprintf(stderr, "  ttl: %d\n", rrset->ttl);
+
+        fprintf(stderr, "  RRSIGs:\n");
+        if (rrset->rrsigs != NULL) {
+                knot_rrset_dump(rrset->rrsigs, loaded_zone);
+        } else {
+                fprintf(stderr, "  none\n");
+        }
+
+	if (rrset->rdata == NULL) {
+		fprintf(stderr, "  NO RDATA!\n");
+		fprintf(stderr, "  ------- RRSET -------\n");
+		return;
+	}
+
+	fprintf(stderr, "  rdata count: %d\n", rrset->rdata->count);
+	knot_rdata_t *tmp = rrset->rdata;
+	
+	while (tmp->next != rrset->rdata && tmp->next != NULL) {
+		knot_rdata_dump(tmp, rrset->type, loaded_zone);
+		tmp = tmp->next;
+	}
+
+	knot_rdata_dump(tmp, rrset->type, loaded_zone);
+
+	fprintf(stderr, "  ------- RRSET -------\n");
+#endif
+}
+
+void knot_node_dump(knot_node_t *node, void *loaded_zone)
+{
+#if defined(KNOT_ZONE_DEBUG) || defined(KNOT_NODE_DEBUG)
+	//char loaded_zone = *((char*) data);
+	char *name;
+
+	fprintf(stderr, "------- NODE --------\n");
+	name = knot_dname_to_str(node->owner);
+	fprintf(stderr, "owner: %s\n", name);
+	free(name);
+	fprintf(stderr, "labels: ");
+	hex_print((char *)node->owner->labels, node->owner->label_count);
+	fprintf(stderr, "node: %p\n", node);
+	fprintf(stderr, "node (in node's owner): %p\n", node->owner->node);
+	if (loaded_zone && node->prev != NULL) {
+		name = knot_dname_to_str(node->prev->owner);
+		fprintf(stderr, "previous node: %s\n", name);
+		free(name);
+	}
+
+	if (knot_node_is_deleg_point(node)) {
+		fprintf(stderr, "delegation point\n");
+	}
+
+	if (knot_node_is_non_auth(node)) {
+		fprintf(stderr, "non-authoritative node\n");
+	}
+
+	if (node->parent != NULL) {
+		/*! \todo This causes segfault when parent was free'd,
+		 *        e.g. when applying changesets.
+		 */
+		name = knot_dname_to_str(node->parent->owner);
+		fprintf(stderr, "parent: %s\n", name);
+		free(name);
+	} else {
+		fprintf(stderr, "no parent\n");
+	}
+
+	if (node->prev != NULL) {
+		fprintf(stderr, "previous node: %p\n", node->prev);
+		/*! \todo This causes segfault when prev was free'd,
+		 *        e.g. when applying changesets.
+		 */
+		name = knot_dname_to_str(node->prev->owner);
+		fprintf(stderr, "previous node: %s\n", name);
+		free(name);
+	} else {
+		fprintf(stderr, "previous node: none\n");
+	}
+
+	knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+
+	fprintf(stderr, "Wildcard child: ");
+
+	if (node->wildcard_child != NULL) {
+		/*! \todo This causes segfault when wildcard child was free'd,
+		 *        e.g. when applying changesets.
+		 */
+		name = knot_dname_to_str(node->wildcard_child->owner);
+		fprintf(stderr, "%s\n", name);
+		free(name);
+	} else {
+		fprintf(stderr, "none\n");
+	}
+
+	fprintf(stderr, "NSEC3 node: ");
+
+	if (node->nsec3_node != NULL) {
+		/*! \todo This causes segfault when nsec3_node was free'd,
+		 *        e.g. when applying changesets.
+		 */
+		name = knot_dname_to_str(node->nsec3_node->owner);
+		fprintf(stderr, "%s\n", name);
+		free(name);
+	} else {
+		fprintf(stderr, "none\n");
+	}
+
+	fprintf(stderr, "RRSet count: %d\n", node->rrset_count);
+
+	for (int i = 0; i < node->rrset_count; i++) {
+		knot_rrset_dump(rrsets[i], (int) loaded_zone);
+	}
+	free(rrsets);
+	//assert(node->owner->node == node);
+	fprintf(stderr, "------- NODE --------\n");
+#endif
+}
+
+void knot_zone_contents_dump(knot_zone_contents_t *zone, char loaded_zone)
+{
+#if defined(KNOT_ZONE_DEBUG)
+	if (!zone) {
+		fprintf(stderr, "------- STUB ZONE --------\n");
+		return;
+	}
+
+	fprintf(stderr, "------- ZONE --------\n");
+
+	knot_zone_contents_tree_apply_inorder(zone, knot_node_dump, (void *)&loaded_zone);
+
+	fprintf(stderr, "------- ZONE --------\n");
+	
+	fprintf(stderr, "------- NSEC 3 tree -\n");
+
+	knot_zone_contents_nsec3_apply_inorder(zone, knot_node_dump, (void *)&loaded_zone);
+
+	fprintf(stderr, "------- NSEC 3 tree -\n");
+#endif
+}
diff --git a/src/libknot/util/debug.h b/src/libknot/util/debug.h
new file mode 100644
index 0000000..2f9f5fd
--- /dev/null
+++ b/src/libknot/util/debug.h
@@ -0,0 +1,755 @@
+/*!
+ * \file debug.h
+ *
+ * \author Jan Kadlec <jan.kadlec.@nic.cz>
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Functions for debug output of structures.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_DEBUG_H_
+#define _KNOT_DEBUG_H_
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include "config.h" /* autoconf generated */
+
+#include "rdata.h"
+#include "rrset.h"
+#include "zone/node.h"
+#include "zone/zone.h"
+#include "util/utils.h"
+#include "common/print.h"
+
+/*
+ * Debug macros
+ */
+/*! \todo Set these during configure. */
+//#define KNOT_ZONE_DEBUG
+//#define KNOT_RESPONSE_DEBUG
+//#define KNOT_ZONEDB_DEBUG
+//#define KNOT_DNAME_DEBUG
+//#define KNOT_NODE_DEBUG
+//#define KNOT_PACKET_DEBUG
+//#define KNOT_EDNS_DEBUG
+//#define KNOT_RRSET_DEBUG
+//#define KNOT_RDATA_DEBUG
+//#define KNOT_NSEC3_DEBUG
+//#define CUCKOO_DEBUG
+//#define CUCKOO_DEBUG_HASH
+//#define KNOT_NS_DEBUG
+//#define KNOT_XFRIN_DEBUG
+//#define KNOT_DDNS_DEBUG
+//#define KNOT_TSIG_DEBUG
+
+/*!
+ * \brief Dumps RDATA of the given type.
+ *
+ * This function is empty if neither KNOT_ZONE_DEBUG nor KNOT_RDATA_DEBUG
+ * is defined.
+ *
+ * \param rdata RDATA to dump.
+ * \param type Type of the RDATA (needed to properly parse the RDATA).
+ * \param loaded_zone Set to <> 0 if the RDATA is part of a zone loaded into
+ *                    the server. Set to 0 otherwise.
+ */
+void knot_rdata_dump(knot_rdata_t *rdata, uint32_t type, char loaded_zone);
+
+/*!
+ * \brief Dumps RRSet.
+ *
+ * This function is empty if neither KNOT_ZONE_DEBUG nor KNOT_RRSET_DEBUG
+ * is defined.
+ *
+ * \param rrset RRSet to dump.
+ * \param loaded_zone Set to <> 0 if the RRSet is part of a zone loaded into
+ *                    the server. Set to 0 otherwise.
+ */
+void knot_rrset_dump(const knot_rrset_t *rrset, char loaded_zone);
+
+/*!
+ * \brief Dumps zone node.
+ *
+ * This function is empty if neither KNOT_ZONE_DEBUG nor KNOT_NODE_DEBUG
+ * is defined.
+ *
+ * \param node Node to dump.
+ * \param loaded_zone Set to <> 0 if the node is part of a zone loaded into
+ *                    the server. Set to 0 otherwise.
+ */
+void knot_node_dump(knot_node_t *node, void *loaded_zone);
+
+/*!
+ * \brief Dumps the whole zone.
+ *
+ * This function is empty if KNOT_ZONE_DEBUG is not defined.
+ *
+ * \param zone Zone to dump.
+ * \param loaded_zone Set to <> 0 if the node is part of a zone loaded into
+ *                    the server. Set to 0 otherwise.
+ */
+void knot_zone_contents_dump(knot_zone_contents_t *zone, char loaded_zone);
+
+/******************************************************************************/
+
+#ifdef KNOT_NS_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_ns(msg...) fprintf(stderr, msg)
+#define dbg_ns_hex(data, len)  hex_print((data), (len))
+#define dbg_ns_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_ns(msg...)
+#define dbg_ns_hex(data, len)
+#define dbg_ns_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_ns_verb(msg...) fprintf(stderr, msg)
+#define dbg_ns_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_ns_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_ns_verb(msg...)
+#define dbg_ns_hex_verb(data, len)
+#define dbg_ns_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_ns_detail(msg...) fprintf(stderr, msg)
+#define dbg_ns_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_ns_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_ns_detail(msg...)
+#define dbg_ns_hex_detail(data, len)
+#define dbg_ns_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_ns(msg...)
+#define dbg_ns_hex(data, len)
+#define dbg_ns_exec(cmds)
+#define dbg_ns_verb(msg...)
+#define dbg_ns_hex_verb(data, len)
+#define dbg_ns_exec_verb(cmds)
+#define dbg_ns_detail(msg...)
+#define dbg_ns_hex_detail(data, len)
+#define dbg_ns_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_DNAME_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_dname(msg...) fprintf(stderr, msg)
+#define dbg_dname_hex(data, len)  hex_print((data), (len))
+#define dbg_dname_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_dname(msg...)
+#define dbg_dname_hex(data, len)
+#define dbg_dname_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_dname_verb(msg...) fprintf(stderr, msg)
+#define dbg_dname_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_dname_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_dname_verb(msg...)
+#define dbg_dname_hex_verb(data, len)
+#define dbg_dname_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_dname_detail(msg...) fprintf(stderr, msg)
+#define dbg_dname_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_dname_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_dname_detail(msg...)
+#define dbg_dname_hex_detail(data, len)
+#define dbg_dname_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_dname(msg...)
+#define dbg_dname_hex(data, len)
+#define dbg_dname_exec(cmds)
+#define dbg_dname_verb(msg...)
+#define dbg_dname_hex_verb(data, len)
+#define dbg_dname_exec_verb(cmds)
+#define dbg_dname_detail(msg...)
+#define dbg_dname_hex_detail(data, len)
+#define dbg_dname_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_NODE_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_node(msg...) fprintf(stderr, msg)
+#define dbg_node_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_node(msg...)
+#define dbg_node_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_node_verb(msg...) fprintf(stderr, msg)
+#define dbg_node_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_node_verb(msg...)
+#define dbg_node_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_node_detail(msg...) fprintf(stderr, msg)
+#define dbg_node_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_node_detail(msg...)
+#define dbg_node_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_node(msg...)
+#define dbg_node_hex(data, len)
+#define dbg_node_verb(msg...)
+#define dbg_node_hex_verb(data, len)
+#define dbg_node_detail(msg...)
+#define dbg_node_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_ZONE_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_zone(msg...) fprintf(stderr, msg)
+#define dbg_zone_hex(data, len)  hex_print((data), (len))
+#define dbg_zone_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_zone(msg...)
+#define dbg_zone_hex(data, len)
+#define dbg_zone_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_zone_verb(msg...) fprintf(stderr, msg)
+#define dbg_zone_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_zone_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_zone_verb(msg...)
+#define dbg_zone_hex_verb(data, len)
+#define dbg_zone_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_zone_detail(msg...) fprintf(stderr, msg)
+#define dbg_zone_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_zone_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_zone_detail(msg...)
+#define dbg_zone_hex_detail(data, len)
+#define dbg_zone_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_zone(msg...)
+#define dbg_zone_hex(data, len)
+#define dbg_zone_exec(cmds)
+#define dbg_zone_verb(msg...)
+#define dbg_zone_hex_verb(data, len)
+#define dbg_zone_exec_verb(cmds)
+#define dbg_zone_detail(msg...)
+#define dbg_zone_hex_detail(data, len)
+#define dbg_zone_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_ZONEDB_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_zonedb(msg...) fprintf(stderr, msg)
+#define dbg_zonedb_hex(data, len)  hex_print((data), (len))
+#define dbg_zonedb_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_zonedb(msg...)
+#define dbg_zonedb_hex(data, len)
+#define dbg_zonedb_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_zonedb_verb(msg...) fprintf(stderr, msg)
+#define dbg_zonedb_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_zonedb_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_zonedb_verb(msg...)
+#define dbg_zonedb_hex_verb(data, len)
+#define dbg_zonedb_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_zonedb_detail(msg...) fprintf(stderr, msg)
+#define dbg_zonedb_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_zonedb_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_zonedb_detail(msg...)
+#define dbg_zonedb_hex_detail(data, len)
+#define dbg_zonedb_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_zonedb(msg...)
+#define dbg_zonedb_hex(data, len)
+#define dbg_zonedb_exec(cmds)
+#define dbg_zonedb_verb(msg...)
+#define dbg_zonedb_hex_verb(data, len)
+#define dbg_zonedb_exec_verb(cmds)
+#define dbg_zonedb_detail(msg...)
+#define dbg_zonedb_hex_detail(data, len)
+#define dbg_zonedb_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_RESPONSE_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_response(msg...) fprintf(stderr, msg)
+#define dbg_response_hex(data, len)  hex_print((data), (len))
+#define dbg_response_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_response(msg...)
+#define dbg_response_hex(data, len)
+#define dbg_response_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_response_verb(msg...) fprintf(stderr, msg)
+#define dbg_response_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_response_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_response_verb(msg...)
+#define dbg_response_hex_verb(data, len)
+#define dbg_response_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_response_detail(msg...) fprintf(stderr, msg)
+#define dbg_response_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_response_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_response_detail(msg...)
+#define dbg_response_hex_detail(data, len)
+#define dbg_response_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_response(msg...)
+#define dbg_response_hex(data, len)
+#define dbg_response_exec(cmds)
+#define dbg_response_verb(msg...)
+#define dbg_response_hex_verb(data, len)
+#define dbg_response_exec_verb(cmds)
+#define dbg_response_detail(msg...)
+#define dbg_response_hex_detail(data, len)
+#define dbg_response_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_PACKET_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_packet(msg...) fprintf(stderr, msg)
+#define dbg_packet_hex(data, len)  hex_print((data), (len))
+#define dbg_packet_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_packet(msg...)
+#define dbg_packet_hex(data, len)
+#define dbg_packet_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_packet_verb(msg...) fprintf(stderr, msg)
+#define dbg_packet_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_packet_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_packet_verb(msg...)
+#define dbg_packet_hex_verb(data, len)
+#define dbg_packet_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_packet_detail(msg...) fprintf(stderr, msg)
+#define dbg_packet_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_packet_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_packet_detail(msg...)
+#define dbg_packet_hex_detail(data, len)
+#define dbg_packet_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_packet(msg...)
+#define dbg_packet_hex(data, len)
+#define dbg_packet_exec(cmds)
+#define dbg_packet_verb(msg...)
+#define dbg_packet_hex_verb(data, len)
+#define dbg_packet_exec_verb(cmds)
+#define dbg_packet_detail(msg...)
+#define dbg_packet_hex_detail(data, len)
+#define dbg_packet_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_EDNS_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_edns(msg...) fprintf(stderr, msg)
+#define dbg_edns_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_edns(msg...)
+#define dbg_edns_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_edns_verb(msg...) fprintf(stderr, msg)
+#define dbg_edns_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_edns_verb(msg...)
+#define dbg_edns_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_edns_detail(msg...) fprintf(stderr, msg)
+#define dbg_edns_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_edns_detail(msg...)
+#define dbg_edns_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_edns(msg...)
+#define dbg_edns_hex(data, len)
+#define dbg_edns_verb(msg...)
+#define dbg_edns_hex_verb(data, len)
+#define dbg_edns_detail(msg...)
+#define dbg_edns_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_NSEC3_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_nsec3(msg...) fprintf(stderr, msg)
+#define dbg_nsec3_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_nsec3(msg...)
+#define dbg_nsec3_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_nsec3_verb(msg...) fprintf(stderr, msg)
+#define dbg_nsec3_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_nsec3_verb(msg...)
+#define dbg_nsec3_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_nsec3_detail(msg...) fprintf(stderr, msg)
+#define dbg_nsec3_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_nsec3_detail(msg...)
+#define dbg_nsec3_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_nsec3(msg...)
+#define dbg_nsec3_hex(data, len)
+#define dbg_nsec3_verb(msg...)
+#define dbg_nsec3_hex_verb(data, len)
+#define dbg_nsec3_detail(msg...)
+#define dbg_nsec3_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef CUCKOO_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_ck(msg...) fprintf(stderr, msg)
+#define dbg_ck_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck(msg...)
+#define dbg_ck_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_ck_verb(msg...) fprintf(stderr, msg)
+#define dbg_ck_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck_verb(msg...)
+#define dbg_ck_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_ck_detail(msg...) fprintf(stderr, msg)
+#define dbg_ck_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck_detail(msg...)
+#define dbg_ck_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_ck(msg...)
+#define dbg_ck_hex(data, len)
+#define dbg_ck_verb(msg...)
+#define dbg_ck_hex_verb(data, len)
+#define dbg_ck_detail(msg...)
+#define dbg_ck_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef CUCKOO_DEBUG_HASH
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_ck_hash(msg...) fprintf(stderr, msg)
+#define dbg_ck_rehash(msg...) fprintf(stderr, msg)
+#define dbg_ck_hash_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck_hash(msg...)
+#define dbg_ck_rehash(msg...)
+#define dbg_ck_hash_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_ck_hash_verb(msg...) fprintf(stderr, msg)
+#define dbg_ck_hash_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck_hash_verb(msg...)
+#define dbg_ck_hash_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_ck_hash_detail(msg...) fprintf(stderr, msg)
+#define dbg_ck_hash_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_ck_hash_detail(msg...)
+#define dbg_ck_hash_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_ck_hash(msg...)
+#define dbg_ck_rehash(msg...)
+#define dbg_ck_hash_hex(data, len)
+#define dbg_ck_hash_verb(msg...)
+#define dbg_ck_hash_hex_verb(data, len)
+#define dbg_ck_hash_detail(msg...)
+#define dbg_ck_hash_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_XFRIN_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_xfrin(msg...) fprintf(stderr, msg)
+#define dbg_xfrin_hex(data, len)  hex_print((data), (len))
+#define dbg_xfrin_exec(cmds) do { cmds } while (0)
+#else
+#define dbg_xfrin(msg...)
+#define dbg_xfrin_hex(data, len)
+#define dbg_xfrin_exec(cmds)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_xfrin_verb(msg...) fprintf(stderr, msg)
+#define dbg_xfrin_hex_verb(data, len)  hex_print((data), (len))
+#define dbg_xfrin_exec_verb(cmds) do { cmds } while (0)
+#else
+#define dbg_xfrin_verb(msg...)
+#define dbg_xfrin_hex_verb(data, len)
+#define dbg_xfrin_exec_verb(cmds)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_xfrin_detail(msg...) fprintf(stderr, msg)
+#define dbg_xfrin_hex_detail(data, len)  hex_print((data), (len))
+#define dbg_xfrin_exec_detail(cmds) do { cmds } while (0)
+#else
+#define dbg_xfrin_detail(msg...)
+#define dbg_xfrin_hex_detail(data, len)
+#define dbg_xfrin_exec_detail(cmds)
+#endif
+
+/* No messages. */
+#else
+#define dbg_xfrin(msg...)
+#define dbg_xfrin_hex(data, len)
+#define dbg_xfrin_exec(cmds)
+#define dbg_xfrin_verb(msg...)
+#define dbg_xfrin_hex_verb(data, len)
+#define dbg_xfrin_exec_verb(cmds)
+#define dbg_xfrin_detail(msg...)
+#define dbg_xfrin_hex_detail(data, len)
+#define dbg_xfrin_exec_detail(cmds)
+#endif
+
+/******************************************************************************/
+
+#ifdef KNOT_DDNS_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_ddns(msg...) fprintf(stderr, msg)
+#define dbg_ddns_hex(data, len)  hex_print((data), (len))
+#else
+#define dbg_ddns(msg...)
+#define dbg_ddns_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_ddns_verb(msg...) fprintf(stderr, msg)
+#define dbg_ddns_hex_verb(data, len)  hex_print((data), (len))
+#else
+#define dbg_ddns_verb(msg...)
+#define dbg_ddns_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_ddns_detail(msg...) fprintf(stderr, msg)
+#define dbg_ddns_hex_detail(data, len)  hex_print((data), (len))
+#else
+#define dbg_ddns_detail(msg...)
+#define dbg_ddns_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_ddns(msg...)
+#define dbg_ddns_hex(data, len)
+#define dbg_ddns_verb(msg...)
+#define dbg_ddns_hex_verb(data, len)
+#define dbg_ddns_detail(msg...)
+#define dbg_ddns_hex_detail(data, len)
+#endif
+
+#ifdef KNOT_TSIG_DEBUG
+
+/* Brief messages. */
+#ifdef DEBUG_ENABLE_BRIEF
+#define dbg_tsig(msg...) fprintf(stderr, msg)
+#define dbg_tsig_hex(data, len)  hex_print((const char*)(data), (len))
+#else
+#define dbg_tsig(msg...)
+#define dbg_tsig_hex(data, len)
+#endif
+
+/* Verbose messages. */
+#ifdef DEBUG_ENABLE_VERBOSE
+#define dbg_tsig_verb(msg...) fprintf(stderr, msg)
+#define dbg_tsig_hex_verb(data, len)  hex_print((const char*)(data), (len))
+#else
+#define dbg_tsig_verb(msg...)
+#define dbg_tsig_hex_verb(data, len)
+#endif
+
+/* Detail messages. */
+#ifdef DEBUG_ENABLE_DETAILS
+#define dbg_tsig_detail(msg...) fprintf(stderr, msg)
+#define dbg_tsig_hex_detail(data, len)  hex_print((const char*)(data), (len))
+#else
+#define dbg_tsig_detail(msg...)
+#define dbg_tsig_hex_detail(data, len)
+#endif
+
+/* No messages. */
+#else
+#define dbg_tsig(msg...)
+#define dbg_tsig_hex(data, len)
+#define dbg_tsig_verb(msg...)
+#define dbg_tsig_hex_verb(data, len)
+#define dbg_tsig_detail(msg...)
+#define dbg_tsig_hex_detail(data, len)
+#endif
+
+/******************************************************************************/
+
+#endif /* _KNOT_DEBUG_H_ */
+
+/*! @} */
diff --git a/src/libknot/util/descriptor.c b/src/libknot/util/descriptor.c
new file mode 100644
index 0000000..fa94c24
--- /dev/null
+++ b/src/libknot/util/descriptor.c
@@ -0,0 +1,501 @@
+/*!
+ * \file descriptor.c
+ *
+ * \author Modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         most of the work by NLnet labs.
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \note Most of the constants and functions were taken from NSD's dns.c.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "libknot.h"
+
+enum desclen { KNOT_RRTYPE_DESCRIPTORS_LENGTH = 32770 }; // used to be 101
+
+/*!
+ * \brief Table for linking RR class constants to their textual representation.
+ */
+static knot_lookup_table_t dns_rrclasses[] = {
+	{ KNOT_CLASS_IN, "IN" },	/* the Internet */
+	{ KNOT_CLASS_CS, "CS" },	/* the CSNET class (Obsolete) */
+	{ KNOT_CLASS_CH, "CH" },	/* the CHAOS class */
+	{ KNOT_CLASS_HS, "HS" },	/* Hesiod */
+	{ 0, NULL }
+};
+
+/*! \brief RR type descriptors. */
+static knot_rrtype_descriptor_t
+       knot_rrtype_descriptors[KNOT_RRTYPE_DESCRIPTORS_LENGTH] = {
+        /* 0 */
+  	{ 0, NULL, 1, { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 1 */
+  	{ KNOT_RRTYPE_A, "A", 1, { KNOT_RDATA_WF_A }, { KNOT_RDATA_ZF_A }, true },
+  	/* 2 */
+  	{ KNOT_RRTYPE_NS, "NS", 1,
+	{ KNOT_RDATA_WF_COMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 3 */
+  	{ KNOT_RRTYPE_MD, "MD", 1,
+  	  { KNOT_RDATA_WF_UNCOMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 4 */
+  	{ KNOT_RRTYPE_MF, "MF", 1,
+  	  { KNOT_RDATA_WF_UNCOMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 5 */
+  	{ KNOT_RRTYPE_CNAME, "CNAME", 1,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 6 */
+  	{ KNOT_RRTYPE_SOA, "SOA", 7,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME, KNOT_RDATA_WF_COMPRESSED_DNAME,
+	    KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG,
+	    KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG },
+	  { KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_PERIOD, KNOT_RDATA_ZF_PERIOD,
+	    KNOT_RDATA_ZF_PERIOD, KNOT_RDATA_ZF_PERIOD, KNOT_RDATA_ZF_PERIOD },
+	  true },
+  	/* 7 */
+  	{ KNOT_RRTYPE_MB, "MB", 1,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 8 */
+  	{ KNOT_RRTYPE_MG, "MG", 1,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 9 */
+  	{ KNOT_RRTYPE_MR, "MR", 1,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME }, { KNOT_RDATA_ZF_DNAME }, true },
+    	/* 10 */
+  	{ KNOT_RRTYPE_NULL, NULL, 1,
+  	  { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 11 */
+  	{ KNOT_RRTYPE_WKS, "WKS", 2,
+	  { KNOT_RDATA_WF_A, KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_A, KNOT_RDATA_ZF_SERVICES }, true },
+  	/* 12 */
+  	{ KNOT_RRTYPE_PTR, "PTR", 1,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 13 */
+  	{ KNOT_RRTYPE_HINFO, "HINFO", 2,
+  	  { KNOT_RDATA_WF_TEXT_SINGLE, KNOT_RDATA_WF_TEXT_SINGLE },
+	  { KNOT_RDATA_ZF_TEXT, KNOT_RDATA_ZF_TEXT }, true },
+  	/* 14 */
+  	{ KNOT_RRTYPE_MINFO, "MINFO", 2,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME,
+	    KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 15 */
+  	{ KNOT_RRTYPE_MX, "MX", 2,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 16 */ /* This is obscure, but I guess there's no other way */
+	{ KNOT_RRTYPE_TXT, "TXT", 1,
+  	  { KNOT_RDATA_WF_TEXT },
+	  { KNOT_RDATA_ZF_TEXT },
+	    false },
+  	/* 17 */
+  	{ KNOT_RRTYPE_RP, "RP", 2,
+  	  { KNOT_RDATA_WF_COMPRESSED_DNAME,
+	    KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 18 */
+  	{ KNOT_RRTYPE_AFSDB, "AFSDB", 2,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 19 */
+  	{ KNOT_RRTYPE_X25, "X25", 1,
+  	  { KNOT_RDATA_WF_TEXT_SINGLE },
+	  { KNOT_RDATA_ZF_TEXT }, true },
+  	/* 20 */
+  	{ KNOT_RRTYPE_ISDN, "ISDN", 2,
+  	  { KNOT_RDATA_WF_TEXT_SINGLE, KNOT_RDATA_WF_TEXT_SINGLE },
+	  { KNOT_RDATA_ZF_TEXT, KNOT_RDATA_ZF_TEXT }, false },
+  	/* 21 */
+  	{ KNOT_RRTYPE_RT, "RT", 2,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_COMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 22 */
+  	{ KNOT_RRTYPE_NSAP, "NSAP", 1,
+  	  { KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_NSAP }, true },
+  	/* 23 */
+  	{ 23, NULL, 1, { KNOT_RDATA_WF_BINARY },
+	{ KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 24 */
+  	{ KNOT_RRTYPE_SIG, "SIG", 9,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG,
+	    KNOT_RDATA_WF_SHORT,KNOT_RDATA_WF_UNCOMPRESSED_DNAME,
+	    KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_RRTYPE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_PERIOD,
+	    KNOT_RDATA_ZF_TIME, KNOT_RDATA_ZF_TIME, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME,
+	    KNOT_RDATA_ZF_BASE64 },
+	    true },
+  	/* 25 */
+  	{ KNOT_RRTYPE_KEY, "KEY", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BINARY },
+	    { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_ALGORITHM,
+	    KNOT_RDATA_ZF_BASE64 }, true },
+  	/* 26 */
+  	{ KNOT_RRTYPE_PX, "PX", 3,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_UNCOMPRESSED_DNAME,
+  	    KNOT_RDATA_WF_UNCOMPRESSED_DNAME },
+	    { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 27 */
+	{ 27, NULL, 1, { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 28 */
+  	{ KNOT_RRTYPE_AAAA, "AAAA", 1,
+  	  { KNOT_RDATA_WF_AAAA },
+	  { KNOT_RDATA_ZF_AAAA }, true },
+  	/* 29 */
+  	{ KNOT_RRTYPE_LOC, "LOC", 1,
+  	  { KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_LOC }, true },
+  	/* 30 */
+  	{ KNOT_RRTYPE_NXT, "NXT", 2,
+  	  { KNOT_RDATA_WF_UNCOMPRESSED_DNAME,
+	    KNOT_RDATA_WF_BINARY },
+	    { KNOT_RDATA_ZF_DNAME, KNOT_RDATA_ZF_NXT }, true },
+  	/* 31 */
+  	{ 31, NULL, 1, { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 32 */
+  	{ 32, NULL, 1, { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 33 */
+  	{ KNOT_RRTYPE_SRV, "SRV", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_SHORT,
+	    KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_UNCOMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME },
+	  true },
+  	/* 34 */
+  	{ 34, NULL, 1, { KNOT_RDATA_WF_BINARY }, { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 35 */
+  	{ KNOT_RRTYPE_NAPTR, "NAPTR", 6,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_TEXT_SINGLE,
+	    KNOT_RDATA_WF_TEXT_SINGLE, KNOT_RDATA_WF_TEXT_SINGLE,
+	    KNOT_RDATA_WF_UNCOMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_TEXT, KNOT_RDATA_ZF_TEXT,
+	    KNOT_RDATA_ZF_TEXT, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 36 */
+  	{ KNOT_RRTYPE_KX, "KX", 2,
+  	  { KNOT_RDATA_WF_SHORT,
+	    KNOT_RDATA_WF_UNCOMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_DNAME }, true },
+  	/* 37 */
+  	{ KNOT_RRTYPE_CERT, "CERT", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_SHORT,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_CERTIFICATE_TYPE, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_ALGORITHM,
+	    KNOT_RDATA_ZF_BASE64 }, true },
+  	/* 38 */
+  	{ KNOT_RRTYPE_A6, NULL, 1, { KNOT_RDATA_WF_BINARY },
+	{ KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 39 */
+  	{ KNOT_RRTYPE_DNAME, "DNAME", 1,
+  	  { KNOT_RDATA_WF_UNCOMPRESSED_DNAME },
+	  { KNOT_RDATA_ZF_DNAME }, true },
+  	/* 40 */
+  	{ 40, NULL, 1, { KNOT_RDATA_WF_BINARY },
+	{ KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 41 */
+	/* OPT has its parser token, but should never be in zone file... */
+  	{ KNOT_RRTYPE_OPT, "OPT", 1,
+  	  { KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_UNKNOWN }, true },
+  	/* 42 */
+	{ KNOT_RRTYPE_APL, "APL", 1,
+  	  { KNOT_RDATA_WF_APL },
+    	  { KNOT_RDATA_ZF_APL }, false },
+  	/* 43 */
+  	{ KNOT_RRTYPE_DS, "DS", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE,
+	  KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BINARY },
+  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_ALGORITHM, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_HEX }, true },
+  	/* 44 */
+  	{ KNOT_RRTYPE_SSHFP, "SSHFP", 3,
+  	  { KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BINARY },
+	    { KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_HEX },
+	      true },
+  	/* 45 */
+  	{ KNOT_RRTYPE_IPSECKEY, "IPSECKEY", 5,
+  	  { KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_IPSECGATEWAY,
+  	    KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_IPSECGATEWAY,
+	    KNOT_RDATA_ZF_BASE64 }, false },
+  	/* 46 */
+  	{ KNOT_RRTYPE_RRSIG, "RRSIG", 9,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_LONG,
+  	    KNOT_RDATA_WF_LONG, KNOT_RDATA_WF_LONG,
+	    KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_LITERAL_DNAME,
+	    KNOT_RDATA_WF_BINARY },
+	    { KNOT_RDATA_ZF_RRTYPE, KNOT_RDATA_ZF_ALGORITHM,
+              KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_PERIOD,
+              KNOT_RDATA_ZF_TIME, KNOT_RDATA_ZF_TIME,
+              KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_LITERAL_DNAME,
+              KNOT_RDATA_ZF_BASE64 }, true },
+  	/* 47 */
+  	{ KNOT_RRTYPE_NSEC, "NSEC", 2,
+	  { KNOT_RDATA_WF_LITERAL_DNAME, KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_LITERAL_DNAME, KNOT_RDATA_ZF_NSEC },
+	  true },
+  	/* 48 */
+  	{ KNOT_RRTYPE_DNSKEY, "DNSKEY", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BINARY },
+	  { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_BYTE,
+            KNOT_RDATA_ZF_ALGORITHM, KNOT_RDATA_ZF_BASE64 }, true },
+  	/* 49 */
+  	{ KNOT_RRTYPE_DHCID, "DHCID", 1, { KNOT_RDATA_WF_BINARY },
+	{ KNOT_RDATA_ZF_BASE64 }, true },
+  	/* 50 */
+  	{ KNOT_RRTYPE_NSEC3, "NSEC3", 6,
+  	  { KNOT_RDATA_WF_BYTE, /* hash type */
+  	    KNOT_RDATA_WF_BYTE, /* flags */
+  	    KNOT_RDATA_WF_SHORT, /* iterations */
+  	    KNOT_RDATA_WF_BINARYWITHLENGTH, /* salt */
+	    KNOT_RDATA_WF_BINARYWITHLENGTH, /* next hashed name */
+  	    KNOT_RDATA_WF_BINARY /* type bitmap */ },
+	  { KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_HEX_LEN,
+	    KNOT_RDATA_ZF_BASE32, KNOT_RDATA_ZF_NSEC },
+	    true },
+  	/* 51 */
+  	{ KNOT_RRTYPE_NSEC3PARAM, "NSEC3PARAM", 4,
+  	  { KNOT_RDATA_WF_BYTE, /* hash type */
+  	    KNOT_RDATA_WF_BYTE, /* flags */
+  	    KNOT_RDATA_WF_SHORT, /* iterations */
+  	    KNOT_RDATA_WF_BINARYWITHLENGTH /* salt */ },
+	  { KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_BYTE,
+	    KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_HEX_LEN }, true },
+  	/* 52 */
+
+
+    /* In NSD they have indices between 52 and 99 filled with
+     unknown types. TODO add here if it's really needed? */
+     /* it is indeed needed, in rrtype_from_string */
+
+    /* There's a GNU extension that works like this: [first ... last] = value */
+
+  	/* 99 */
+	[99] = { KNOT_RRTYPE_SPF, "SPF", 1,
+  	  { KNOT_RDATA_WF_TEXT },
+          { KNOT_RDATA_ZF_TEXT }, false },
+        /* TSIG pseudo RR. */
+        [250] = { KNOT_RRTYPE_TSIG, "TSIG", 7,
+		 { KNOT_RDATA_WF_UNCOMPRESSED_DNAME, KNOT_RDATA_WF_UINT48,
+                   KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BINARYWITHSHORT,
+                   KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_SHORT,
+                   KNOT_RDATA_WF_BINARYWITHSHORT },
+                  /* Zoneformat not needed. */
+                  {0, 0, 0, 0, 0}, true },
+  	/* 32769 */
+  	[32769] = { KNOT_RRTYPE_DLV, "DLV", 4,
+  	  { KNOT_RDATA_WF_SHORT, KNOT_RDATA_WF_BYTE,
+	    KNOT_RDATA_WF_BYTE, KNOT_RDATA_WF_BINARY },
+	    { KNOT_RDATA_ZF_SHORT, KNOT_RDATA_ZF_ALGORITHM, KNOT_RDATA_ZF_BYTE, KNOT_RDATA_ZF_HEX },
+	    true },
+};
+
+knot_rrtype_descriptor_t *knot_rrtype_descriptor_by_type(uint16_t type)
+{
+	if (type < KNOT_RRTYPE_LAST + 1) {
+		return &knot_rrtype_descriptors[type];
+	} else if (type == KNOT_RRTYPE_DLV) {
+		return &knot_rrtype_descriptors[KNOT_RRTYPE_DLV];
+	}
+	return &knot_rrtype_descriptors[0];
+}
+
+/* I see a lot of potential here to speed up zone parsing - this is O(n) *
+ * could be better */
+knot_rrtype_descriptor_t *knot_rrtype_descriptor_by_name(const char *name)
+{
+	int i;
+
+	for (i = 0; i < KNOT_RRTYPE_DLV + 1; ++i) {
+		if (knot_rrtype_descriptors[i].name &&
+		    strcasecmp(knot_rrtype_descriptors[i].name, name) == 0) {
+			return &knot_rrtype_descriptors[i];
+		}
+	}
+
+	if (knot_rrtype_descriptors[KNOT_RRTYPE_DLV].name &&
+	    strcasecmp(knot_rrtype_descriptors[KNOT_RRTYPE_DLV].name,
+	                              name) == 0) {
+		return &knot_rrtype_descriptors[KNOT_RRTYPE_DLV];
+	}
+
+	return NULL;
+}
+
+const char *knot_rrtype_to_string(uint16_t rrtype)
+{
+	static char buf[20];
+	knot_rrtype_descriptor_t *descriptor =
+	        knot_rrtype_descriptor_by_type(rrtype);
+	if (descriptor->name) {
+		return descriptor->name;
+	} else {
+		snprintf(buf, sizeof(buf), "TYPE%d", (int) rrtype);
+		return buf;
+	}
+}
+
+uint16_t knot_rrtype_from_string(const char *name)
+{
+	char *end;
+	long rrtype;
+	knot_rrtype_descriptor_t *entry;
+
+	entry = knot_rrtype_descriptor_by_name(name);
+	if (entry) {
+		return entry->type;
+	}
+
+	if (strlen(name) < 5) {
+		return 0;
+	}
+
+	if (strncasecmp(name, "TYPE", 4) != 0) {
+		return 0;
+	}
+
+	if (!isdigit((int)name[4])) {
+		return 0;
+	}
+
+	/* The rest from the string must be a number.  */
+	rrtype = strtol(name + 4, &end, 10);
+	if (*end != '\0') {
+		return 0;
+	}
+	if (rrtype < 0 || rrtype > 65535L) {
+		return 0;
+	}
+
+	return (uint16_t) rrtype;
+}
+
+const char *knot_rrclass_to_string(uint16_t rrclass)
+{
+	static char buf[20];
+	knot_lookup_table_t *entry = knot_lookup_by_id(dns_rrclasses,
+							   rrclass);
+	if (entry) {
+		assert(strlen(entry->name) < sizeof(buf));
+		knot_strlcpy(buf, entry->name, sizeof(buf));
+	} else {
+		snprintf(buf, sizeof(buf), "CLASS%d", (int) rrclass);
+	}
+	return buf;
+}
+
+uint16_t knot_rrclass_from_string(const char *name)
+{
+	char *end;
+	long rrclass;
+	knot_lookup_table_t *entry;
+
+	entry = knot_lookup_by_name(dns_rrclasses, name);
+	if (entry) {
+		return (uint16_t) entry->id;
+	}
+
+	if (strlen(name) < 6) {
+		return 0;
+	}
+
+	if (strncasecmp(name, "CLASS", 5) != 0) {
+		return 0;
+	}
+
+	if (!isdigit((int)name[5])) {
+		return 0;
+	}
+
+	// The rest from the string must be a number.
+	rrclass = strtol(name + 5, &end, 10);
+	if (*end != '\0') {
+		return 0;
+	}
+	if (rrclass < 0 || rrclass > 65535L) {
+		return 0;
+	}
+
+	return (uint16_t) rrclass;
+}
+
+size_t knot_wireformat_size(unsigned int wire_type)
+{
+	switch(wire_type) {
+		case KNOT_RDATA_WF_BYTE:
+			return 1;
+			break;
+		case KNOT_RDATA_WF_SHORT:
+			return 2;
+			break;
+		case KNOT_RDATA_WF_LONG:
+			return 4;
+			break;
+		case KNOT_RDATA_WF_A:
+			return 4;
+			break;
+		default: /* unknown size */
+			return 0;
+			break;
+	} /* switch */
+}
+
+int knot_rrtype_is_metatype(uint16_t type)
+{
+	/*! \todo Check if there are some other metatypes. */
+	return (type == KNOT_RRTYPE_ANY
+	        || type == KNOT_RRTYPE_AXFR
+	        || type == KNOT_RRTYPE_IXFR
+	        || type == KNOT_RRTYPE_MAILA
+	        || type == KNOT_RRTYPE_MAILB
+	        || type == KNOT_RRTYPE_OPT);
+}
+
diff --git a/src/libknot/util/descriptor.h b/src/libknot/util/descriptor.h
new file mode 100644
index 0000000..10d3d20
--- /dev/null
+++ b/src/libknot/util/descriptor.h
@@ -0,0 +1,332 @@
+/*!
+ * \file descriptor.h
+ *
+ * \author Modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         most of the work by NLnet Labs.
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \note Most of the constants and functions were taken from NSD's dns.h.
+ * 
+ * \addtogroup libknot
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _KNOT_DESCRIPTOR_H_
+#define _KNOT_DESCRIPTOR_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+enum knot_mxrdtln {
+	/*! \brief Maximum items in RDATA wireformat. */
+	KNOT_MAX_RDATA_ITEMS = 64,
+	/*! \brief Maximum size of one item in RDATA wireformat. */
+	KNOT_MAX_RDATA_ITEM_SIZE = 65534,
+	/*! \brief Maximum wire size of one RDATA. */
+	KNOT_MAX_RDATA_WIRE_SIZE =
+	KNOT_MAX_RDATA_ITEMS * KNOT_MAX_RDATA_ITEM_SIZE
+};
+
+typedef enum knot_mxrdtln knot_mxrdtln_t;
+//#define MAXRDATALEN 64
+
+/* 64 is in NSD. Seems a little too much, but I'd say it's not a real issue. */
+
+/*!
+ * \brief Resource record class codes.
+ */
+enum knot_rr_class {
+	KNOT_CLASS_IN = 1,
+	KNOT_CLASS_CS,
+	KNOT_CLASS_CH,
+	KNOT_CLASS_HS,
+	KNOT_CLASS_NONE = 254,
+	KNOT_CLASS_ANY = 255
+};
+
+typedef enum knot_rr_class knot_rr_class_t;
+
+/*!
+ * \brief Resource record type constants.
+ * \todo Not all indices can be used for indexing.
+ */
+enum knot_rr_type {
+	KNOT_RRTYPE_UNKNOWN, /*!< 0 - an unknown type */
+	KNOT_RRTYPE_A, /*!< 1 - a host address */
+	KNOT_RRTYPE_NS, /*!< 2 - an authoritative name server */
+	KNOT_RRTYPE_MD, /*!< 3 - a mail destination (Obsolete - use MX) */
+	KNOT_RRTYPE_MF, /*!< 4 - a mail forwarder (Obsolete - use MX) */
+	KNOT_RRTYPE_CNAME, /*!< 5 - the canonical name for an alias */
+	KNOT_RRTYPE_SOA, /*!< 6 - marks the start of a zone of authority */
+	KNOT_RRTYPE_MB, /*!< 7 - a mailbox domain name (EXPERIMENTAL) */
+	KNOT_RRTYPE_MG, /*!< 8 - a mail group member (EXPERIMENTAL) */
+	KNOT_RRTYPE_MR, /*!< 9 - a mail rename domain name (EXPERIMENTAL) */
+	KNOT_RRTYPE_NULL, /*!< 10 - a null RR (EXPERIMENTAL) */
+	KNOT_RRTYPE_WKS, /*!< 11 - a well known service description */
+	KNOT_RRTYPE_PTR, /*!< 12 - a domain name pointer */
+	KNOT_RRTYPE_HINFO, /*!< 13 - host information */
+	KNOT_RRTYPE_MINFO, /*!< 14 - mailbox or mail list information */
+	KNOT_RRTYPE_MX, /*!< 15 - mail exchange */
+	KNOT_RRTYPE_TXT, /*!< 16 - text strings */
+	KNOT_RRTYPE_RP, /*!< 17 - RFC1183 */
+	KNOT_RRTYPE_AFSDB, /*!< 18 - RFC1183 */
+	KNOT_RRTYPE_X25, /*!< 19 - RFC1183 */
+	KNOT_RRTYPE_ISDN, /*!< 20 - RFC1183 */
+	KNOT_RRTYPE_RT, /*!< 21 - RFC1183 */
+	KNOT_RRTYPE_NSAP, /*!< 22 - RFC1706 */
+
+	KNOT_RRTYPE_SIG = 24, /*!< 24 - 2535typecode */
+	KNOT_RRTYPE_KEY, /*!< 25 - 2535typecode */
+	KNOT_RRTYPE_PX, /*!< 26 - RFC2163 */
+
+	KNOT_RRTYPE_AAAA = 28, /*!< 28 - ipv6 address */
+	KNOT_RRTYPE_LOC, /*!< 29 - LOC record  RFC1876 */
+	KNOT_RRTYPE_NXT, /*!< 30 - 2535typecode */
+
+	KNOT_RRTYPE_SRV = 33, /*!< 33 - SRV record RFC2782 */
+
+	KNOT_RRTYPE_NAPTR = 35, /*!< 35 - RFC2915 */
+	KNOT_RRTYPE_KX, /*!< 36 - RFC2230 Key Exchange Delegation Record */
+	KNOT_RRTYPE_CERT, /*!< 37 - RFC2538 */
+	KNOT_RRTYPE_A6, /*!< 38 - RFC2874 */
+	KNOT_RRTYPE_DNAME, /*!< 39 - RFC2672 */
+
+	KNOT_RRTYPE_OPT = 41, /*!< 41 - Pseudo OPT record... */
+	KNOT_RRTYPE_APL, /*!< 42 - RFC3123 */
+	KNOT_RRTYPE_DS, /*!< 43 - RFC 4033, 4034, and 4035 */
+	KNOT_RRTYPE_SSHFP, /*!< 44 - SSH Key Fingerprint */
+	KNOT_RRTYPE_IPSECKEY, /*!< 45 - public key for ipsec use. RFC 4025 */
+	KNOT_RRTYPE_RRSIG, /*!< 46 - RFC 4033, 4034, and 4035 */
+	KNOT_RRTYPE_NSEC, /*!< 47 - RFC 4033, 4034, and 4035 */
+	KNOT_RRTYPE_DNSKEY, /*!< 48 - RFC 4033, 4034, and 4035 */
+	KNOT_RRTYPE_DHCID, /*!< 49 - RFC4701 DHCP information */
+	/*!
+	 * \brief 50 - NSEC3, secure denial, prevents zonewalking
+	 */
+	KNOT_RRTYPE_NSEC3,
+	/*!
+	 * \brief  51 - NSEC3PARAM at zone apex nsec3 parameters
+	 */
+	KNOT_RRTYPE_NSEC3PARAM, 
+
+	/* TODO consider some better way of doing this, indices too high */
+
+	KNOT_RRTYPE_SPF = 99,      /*!< RFC 4408 */
+
+	// not designating any RRs
+	KNOT_RRTYPE_TSIG = 250, /*!< TSIG - RFC2845. */
+	KNOT_RRTYPE_IXFR = 251, /*!< IXFR (not an actual RR). */
+	KNOT_RRTYPE_AXFR = 252, /*!< AXFR (not an actual RR). */
+	/*!
+	 * \brief A request for mailbox-related records (MB, MG or MR)
+	 */
+	KNOT_RRTYPE_MAILB = 253,
+	/*!
+	 * \brief A request for mail agent RRs (Obsolete - see MX)
+	 */
+	KNOT_RRTYPE_MAILA = 254,
+	KNOT_RRTYPE_ANY = 255, /*!< any type (wildcard) */
+
+	// totally weird numbers (cannot use for indexing)
+	KNOT_RRTYPE_TA = 32768, /*!< DNSSEC Trust Authorities */
+	KNOT_RRTYPE_DLV = 32769, /*!< RFC 4431 */
+
+	/*! \brief Last normal RR type. */
+	KNOT_RRTYPE_LAST = KNOT_RRTYPE_TSIG
+	/*! \todo [TSIG] Is it allright to include all <= RR TSIG?
+	 * Because TSIG is normal RR type. */
+};
+
+typedef enum knot_rr_type knot_rr_type_t;
+
+/*! \brief Constants characterising the wire format of RDATA items. */
+enum knot_rdata_wireformat {
+	/*!
+	 * \brief Possibly compressed domain name.
+	 */	
+	KNOT_RDATA_WF_COMPRESSED_DNAME = 50,
+	KNOT_RDATA_WF_UNCOMPRESSED_DNAME = 51, /*!< Uncompressed domain name.  */
+	KNOT_RDATA_WF_LITERAL_DNAME = 52, /*!< Literal (not downcased) dname.  */
+	KNOT_RDATA_WF_BYTE = 1, /*!< 8-bit integer.  */
+	KNOT_RDATA_WF_SHORT = 2, /*!< 16-bit integer.  */
+	KNOT_RDATA_WF_LONG = 4, /*!< 32-bit integer.  */
+	KNOT_RDATA_WF_UINT48 = 8, /*!< 48-bit integer.  */
+	KNOT_RDATA_WF_TEXT = 53, /*!< Text string.  */
+	KNOT_RDATA_WF_A = 58, /*!< 32-bit IPv4 address.  */
+	KNOT_RDATA_WF_AAAA = 16, /*!< 128-bit IPv6 address.  */
+	KNOT_RDATA_WF_BINARY = 54, /*!< Binary data (unknown length).  */
+	/*!
+	 * \brief Binary data preceded by 1 byte length 
+	 */
+	KNOT_RDATA_WF_BINARYWITHLENGTH = 55,
+	KNOT_RDATA_WF_APL = 56, /*!< APL data.  */
+	KNOT_RDATA_WF_IPSECGATEWAY = 57, /*!< IPSECKEY gateway ip4, ip6 or dname. */
+	KNOT_RDATA_WF_BINARYWITHSHORT = 59,
+	KNOT_RDATA_WF_TEXT_SINGLE = 60 /*!< Text string. */
+};
+
+/*! \brief Constants characterising the format of RDATA items in zone file. */
+enum knot_rdata_zoneformat
+{
+	KNOT_RDATA_ZF_DNAME,		/* Domain name.  */
+	KNOT_RDATA_ZF_LITERAL_DNAME,	/* DNS name (not lowercased domain name).  */
+	KNOT_RDATA_ZF_TEXT,		/* Text string.  */
+	KNOT_RDATA_ZF_BYTE,		/* 8-bit integer.  */
+	KNOT_RDATA_ZF_SHORT,		/* 16-bit integer.  */
+	KNOT_RDATA_ZF_LONG,		/* 32-bit integer.  */
+	KNOT_RDATA_ZF_A,		/* 32-bit IPv4 address.  */
+	KNOT_RDATA_ZF_AAAA,		/* 128-bit IPv6 address.  */
+	KNOT_RDATA_ZF_RRTYPE,		/* RR type.  */
+	KNOT_RDATA_ZF_ALGORITHM,	/* Cryptographic algorithm.  */
+	KNOT_RDATA_ZF_CERTIFICATE_TYPE,
+	KNOT_RDATA_ZF_PERIOD,		/* Time period.  */
+	KNOT_RDATA_ZF_TIME,
+	KNOT_RDATA_ZF_BASE64,		/* Base-64 binary data.  */
+	KNOT_RDATA_ZF_BASE32,		/* Base-32 binary data.  */
+	KNOT_RDATA_ZF_HEX,		/* Hexadecimal binary data.  */
+	KNOT_RDATA_ZF_HEX_LEN,	/* Hexadecimal binary data. Skip initial length byte. */
+	KNOT_RDATA_ZF_NSAP,		/* NSAP.  */
+	KNOT_RDATA_ZF_APL,		/* APL.  */
+	KNOT_RDATA_ZF_IPSECGATEWAY,	/* IPSECKEY gateway ip4, ip6 or dname. */
+	KNOT_RDATA_ZF_SERVICES,	/* Protocol and port number bitmap.  */
+	KNOT_RDATA_ZF_NXT,		/* NXT type bitmap.  */
+	KNOT_RDATA_ZF_NSEC,		/* NSEC type bitmap.  */
+	KNOT_RDATA_ZF_LOC,		/* Location data.  */
+	KNOT_RDATA_ZF_UNKNOWN	/* Unknown data.  */
+};
+
+/*! \brief Constants characterising the wire format of RDATA items. */
+typedef enum knot_rdata_zoneformat knot_rdata_zoneformat_t;
+
+/*! \brief Enum containing wireformat codes. */
+typedef enum knot_rdatawireformat knot_rdata_wireformat_t;
+
+/*! \brief Structure holding RR descriptor. */
+struct knot_rrtype_descriptor {
+	uint16_t type;          /*!< RR type */
+	const char *name;       /*!< Textual name.  */
+	uint8_t length;         /*!< Maximum number of RDATA items.  */
+
+	/*! \brief Wire format specification for the RDATA. */
+	uint8_t wireformat[KNOT_MAX_RDATA_ITEMS];
+
+	/*! \brief Zone file format specification for the RDATA. */
+	uint8_t zoneformat[KNOT_MAX_RDATA_ITEMS];
+
+	bool fixed_items; /*!< Has fixed number of RDATA items? */
+};
+
+/*! \brief Structure holding RR descriptor. */
+typedef struct knot_rrtype_descriptor knot_rrtype_descriptor_t;
+
+/*!
+ * \brief Gets RR descriptor for given RR type.
+ *
+ * \param type Code of RR type whose descriptor should be returned.
+ *
+ * \return RR descriptor for given type code, NULL descriptor if
+ *         unknown type.
+ *
+ * \todo Change return value to const.
+ */
+knot_rrtype_descriptor_t *knot_rrtype_descriptor_by_type(uint16_t type);
+
+/*!
+ * \brief Gets RR descriptor for given RR name.
+ *
+ * \param name Mnemonic of RR type whose descriptor should be returned.
+ *
+ * \return RR descriptor for given name, NULL descriptor if
+ *         unknown type.
+ *
+ * \todo Change return value to const.
+ */
+knot_rrtype_descriptor_t *knot_rrtype_descriptor_by_name(const char *name);
+
+/*!
+ * \brief Converts numeric type representation to mnemonic string.
+ *
+ * \param rrtype Type RR type code to be converted.
+ *
+ * \return Mnemonic string if found, str(TYPE[rrtype]) otherwise.
+ */
+const char *knot_rrtype_to_string(uint16_t rrtype);
+
+/*!
+ * \brief Converts mnemonic string representation of a type to numeric one.
+ *
+ * \param name Mnemonic string to be converted.
+ *
+ * \return Correct code if found, 0 otherwise.
+ */
+uint16_t knot_rrtype_from_string(const char *name);
+
+/*!
+ * \brief Converts numeric class representation to string one.
+ *
+ * \param rrclass Class code to be converted.
+ *
+ * \return String represenation of class if found,
+ *         str(CLASS[rrclass]) otherwise.
+ */
+const char *knot_rrclass_to_string(uint16_t rrclass);
+
+/*!
+ * \brief Converts string representation of a class to numeric one.
+ *
+ * \param name Class string to be converted.
+ *
+ * \return Correct code if found, 0 otherwise.
+ */
+uint16_t knot_rrclass_from_string(const char *name);
+
+/*!
+ * \brief Returns size of wireformat type in bytes.
+ *
+ * \param wire_type Wireformat type.
+ *
+ * \retval Size of given type on success.
+ * \retval 0 on unknown type or type that has no length.
+ */
+size_t knot_wireformat_size(unsigned int wire_type);
+
+int knot_rrtype_is_metatype(uint16_t type);
+
+#endif /* _KNOT_DESCRIPTOR_H_ */
+
+/*! @} */
+
diff --git a/src/libknot/util/error.h b/src/libknot/util/error.h
new file mode 100644
index 0000000..da45151
--- /dev/null
+++ b/src/libknot/util/error.h
@@ -0,0 +1,87 @@
+/*!
+ * \file error.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Error codes and function for getting error message.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_ERROR_H_
+#define _KNOT_ERROR_H_
+
+#include "common/errors.h"
+
+/*! \brief Error codes used in the library. */
+enum knot_error {
+	KNOT_EOK = 0,         /*!< OK */
+	
+	/* TSIG errors. */
+	KNOT_TSIG_EBADSIG = -16, /*!< Failed to verify TSIG MAC. */
+	KNOT_TSIG_EBADKEY = -17, /*!< TSIG key not recognized or invalid. */
+	KNOT_TSIG_EBADTIME = -18,/*!< TSIG signing time out of range. */
+	
+	/* General errors. */
+	KNOT_ERROR = -10000,  /*!< General error. */
+	KNOT_ENOMEM,          /*!< Not enough memory. */
+	KNOT_ENOTSUP,         /*!< Operation not supported. */
+	KNOT_EAGAIN,          /*!< OS lacked necessary resources. */
+	KNOT_ERANGE,          /*!< Value is out of range. */
+	KNOT_EBADARG,         /*!< Wrong argument supported. */
+	KNOT_EFEWDATA,        /*!< Not enough data to parse. */
+	KNOT_ESPACE,          /*!< Not enough space provided. */
+	KNOT_EMALF,           /*!< Malformed data. */
+	KNOT_ECRYPTO,         /*!< Error in crypto library. */
+	KNOT_ENSEC3PAR,       /*!< Missing or wrong NSEC3PARAM record. */
+	KNOT_EBADZONE,        /*!< Domain name does not belong to the zone. */
+	KNOT_EHASH,           /*!< Error in hash table. */
+	KNOT_EZONEIN,         /*!< Error inserting zone. */
+	KNOT_ENOZONE,         /*!< No such zone found. */
+	KNOT_ENONODE,         /*!< No such node in zone found. */
+	KNOT_ENORRSET,        /*!< No such RRSet found. */
+	KNOT_EDNAMEPTR,       /*!< Domain name pointer larger than allowed. */
+	KNOT_EPAYLOAD,        /*!< Payload in OPT RR larger than max wire size. */
+	KNOT_ECRC,            /*!< Wrong dump CRC. */
+	KNOT_EPREREQ,         /*!< UPDATE prerequisity not met. */
+	KNOT_ENOXFR,          /*!< Transfer was not sent. */
+	KNOT_ENOIXFR,         /*!< Transfer is not IXFR (is in AXFR format). */
+	KNOT_EXFRREFUSED,     /*!< Zone transfer refused by the server. */
+	KNOT_ECONN,           /*!< Connection reset. */
+	KNOT_ERROR_COUNT = 30
+};
+
+/*! \brief Table linking error messages to error codes. */
+extern const error_table_t knot_error_msgs[KNOT_ERROR_COUNT];
+
+/*!
+ * \brief Returns error message for the given error code.
+ *
+ * \param code Error code.
+ *
+ * \return String containing the error message.
+ */
+static inline const char *knot_strerror(int code)
+{
+	return error_to_str((const error_table_t*)knot_error_msgs, code);
+}
+
+#endif /* _KNOT_ERROR_H_ */
+
+/*! @} */
diff --git a/src/libknot/util/libknot_error.c b/src/libknot/util/libknot_error.c
new file mode 100644
index 0000000..bc2bed2
--- /dev/null
+++ b/src/libknot/util/libknot_error.c
@@ -0,0 +1,53 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "util/error.h"
+#include "util/utils.h"
+
+#include "common/errors.h"
+
+const error_table_t knot_error_msgs[KNOT_ERROR_COUNT] = {
+	{KNOT_EOK, "OK"},
+	{KNOT_ERROR, "General error."},
+	{KNOT_ENOMEM, "Not enough memory."},
+	{KNOT_ENOTSUP, "Operation not supported."},
+	{KNOT_EAGAIN, "OS lacked necessary resources."},
+	{KNOT_ERANGE, "Value is out of range."},
+	{KNOT_EBADARG, "Wrong argument supported."},
+	{KNOT_EFEWDATA, "Not enough data to parse."},
+	{KNOT_ESPACE, "Not enough space provided."},
+	{KNOT_EMALF, "Malformed data."},
+	{KNOT_ECRYPTO, "Error in crypto library."},
+	{KNOT_ENSEC3PAR, "Missing or wrong NSEC3PARAM record."},
+	{KNOT_EBADZONE, "Domain name does not belong to the given zone."},
+	{KNOT_EHASH, "Error in hash table."},
+	{KNOT_EZONEIN, "Error inserting zone."},
+	{KNOT_ENOZONE, "No such zone found."},
+	{KNOT_ENONODE, "No such node in zone found."},
+	{KNOT_ENORRSET, "No such RRSet found."},
+	{KNOT_EDNAMEPTR, "Domain name pointer larger than allowed."},
+	{KNOT_EPAYLOAD, "Payload in OPT RR larger than max wire size."},
+	{KNOT_ECRC, "CRC check failed."},
+	{KNOT_EPREREQ, "UPDATE prerequisity not met."},
+	{KNOT_ENOXFR, "Transfer was not sent."},
+	{KNOT_ENOIXFR, "Transfer is not IXFR (is in AXFR format)."},
+	{KNOT_EXFRREFUSED, "Zone transfer refused by the server."},
+	{KNOT_TSIG_EBADSIG, "Failed to verify TSIG MAC." },
+	{KNOT_TSIG_EBADKEY, "TSIG key not recognized or invalid." },
+	{KNOT_TSIG_EBADTIME, "TSIG signing time out of range." },
+	{KNOT_ECONN, "Connection reset."},
+	{KNOT_ERROR, 0}
+};
diff --git a/src/libknot/util/tolower.c b/src/libknot/util/tolower.c
new file mode 100644
index 0000000..d71c467
--- /dev/null
+++ b/src/libknot/util/tolower.c
@@ -0,0 +1,276 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "util/tolower.h"
+
+const uint8_t char_table[CHAR_TABLE_SIZE] = {
+	'\x00',
+	'\x01',
+	'\x02',
+	'\x03',
+	'\x04',
+	'\x05',
+	'\x06',
+	'\x07',
+	'\x08',
+	'\x09',
+	'\x0A',
+	'\x0B',
+	'\x0C',
+	'\x0D',
+	'\x0E',
+	'\x0F',
+	'\x10',
+	'\x11',
+	'\x12',
+	'\x13',
+	'\x14',
+	'\x15',
+	'\x16',
+	'\x17',
+	'\x18',
+	'\x19',
+	'\x1A',
+	'\x1B',
+	'\x1C',
+	'\x1D',
+	'\x1E',
+	'\x1F',
+	'\x20',
+	'\x21', /* ! */
+	'\x22', /* " */
+	'\x23', /* # */
+	'\x24', /* $ */
+	'\x25', /* % */
+	'\x26', /* & */
+	'\x27', /* ' */
+	'\x28', /* ( */
+	'\x29', /* ) */
+	'\x2A', /* * */
+	'\x2B', /* + */
+	'\x2C', /* , */
+	'\x2D', /* - */
+	'\x2E', /* . */
+	'\x2F', /* / */
+	'\x30', /* 0 */
+	'\x31', /* 1 */
+	'\x32', /* 2 */
+	'\x33', /* 3 */
+	'\x34', /* 4 */
+	'\x35', /* 5 */
+	'\x36', /* 6 */
+	'\x37', /* 7 */
+	'\x38', /* 8 */
+	'\x39', /* 9 */
+	'\x3A', /* : */
+	'\x3B', /* ; */
+	'\x3C', /* < */
+	'\x3D', /* = */
+	'\x3E', /* > */
+	'\x3F', /* ? */
+	'\x40', /* @ */
+	'\x61', /* A */
+	'\x62', /* B */
+	'\x63', /* C */
+	'\x64', /* D */
+	'\x65', /* E */
+	'\x66', /* F */
+	'\x67', /* G */
+	'\x68', /* H */
+	'\x69', /* I */
+	'\x6A', /* J */
+	'\x6B', /* K */
+	'\x6C', /* L */
+	'\x6D', /* M */
+	'\x6E', /* N */
+	'\x6F', /* O */
+	'\x70', /* P */
+	'\x71', /* Q */
+	'\x72', /* R */
+	'\x73', /* S */
+	'\x74', /* T */
+	'\x75', /* U */
+	'\x76', /* V */
+	'\x77', /* W */
+	'\x78', /* X */
+	'\x79', /* Y */
+	'\x7A', /* Z */
+	'\x5B', /* [ */
+	'\x5C', /* \ */
+	'\x5D', /* ] */
+	'\x5E', /* ^ */
+	'\x5F', /* _ */
+	'\x60', /* ` */
+	'\x61', /* a */
+	'\x62', /* b */
+	'\x63', /* c */
+	'\x64', /* d */
+	'\x65', /* e */
+	'\x66', /* f */
+	'\x67', /* g */
+	'\x68', /* h */
+	'\x69', /* i */
+	'\x6A', /* j */
+	'\x6B', /* k */
+	'\x6C', /* l */
+	'\x6D', /* m */
+	'\x6E', /* n */
+	'\x6F', /* o */
+	'\x70', /* p */
+	'\x71', /* q */
+	'\x72', /* r */
+	'\x73', /* s */
+	'\x74', /* t */
+	'\x75', /* u */
+	'\x76', /* v */
+	'\x77', /* w */
+	'\x78', /* x */
+	'\x79', /* y */
+	'\x7A', /* z */
+	'\x7B', /* { */
+	'\x7C', /* | */
+	'\x7D', /* } */
+	'\x7E', /* ~ */
+	'\x7F',
+	'\x80',
+	'\x81',
+	'\x82',
+	'\x83',
+	'\x84',
+	'\x85',
+	'\x86',
+	'\x87',
+	'\x88',
+	'\x89',
+	'\x8A',
+	'\x8B',
+	'\x8C',
+	'\x8D',
+	'\x8E',
+	'\x8F',
+	'\x90',
+	'\x91',
+	'\x92',
+	'\x93',
+	'\x94',
+	'\x95',
+	'\x96',
+	'\x97',
+	'\x98',
+	'\x99',
+	'\x9A',
+	'\x9B',
+	'\x9C',
+	'\x9D',
+	'\x9E',
+	'\x9F',
+	'\xA0',
+	'\xA1',
+	'\xA2',
+	'\xA3',
+	'\xA4',
+	'\xA5',
+	'\xA6',
+	'\xA7',
+	'\xA8',
+	'\xA9',
+	'\xAA',
+	'\xAB',
+	'\xAC',
+	'\xAD',
+	'\xAE',
+	'\xAF',
+	'\xB0',
+	'\xB1',
+	'\xB2',
+	'\xB3',
+	'\xB4',
+	'\xB5',
+	'\xB6',
+	'\xB7',
+	'\xB8',
+	'\xB9',
+	'\xBA',
+	'\xBB',
+	'\xBC',
+	'\xBD',
+	'\xBE',
+	'\xBF',
+	'\xC0',
+	'\xC1',
+	'\xC2',
+	'\xC3',
+	'\xC4',
+	'\xC5',
+	'\xC6',
+	'\xC7',
+	'\xC8',
+	'\xC9',
+	'\xCA',
+	'\xCB',
+	'\xCC',
+	'\xCD',
+	'\xCE',
+	'\xCF',
+	'\xD0',
+	'\xD1',
+	'\xD2',
+	'\xD3',
+	'\xD4',
+	'\xD5',
+	'\xD6',
+	'\xD7',
+	'\xD8',
+	'\xD9',
+	'\xDA',
+	'\xDB',
+	'\xDC',
+	'\xDD',
+	'\xDE',
+	'\xDF',
+	'\xE0',
+	'\xE1',
+	'\xE2',
+	'\xE3',
+	'\xE4',
+	'\xE5',
+	'\xE6',
+	'\xE7',
+	'\xE8',
+	'\xE9',
+	'\xEA',
+	'\xEB',
+	'\xEC',
+	'\xED',
+	'\xEE',
+	'\xEF',
+	'\xF0',
+	'\xF1',
+	'\xF2',
+	'\xF3',
+	'\xF4',
+	'\xF5',
+	'\xF6',
+	'\xF7',
+	'\xF8',
+	'\xF9',
+	'\xFA',
+	'\xFB',
+	'\xFC',
+	'\xFD',
+	'\xFE',
+	'\xFF',
+};
diff --git a/src/libknot/util/tolower.h b/src/libknot/util/tolower.h
new file mode 100644
index 0000000..6b9e98c
--- /dev/null
+++ b/src/libknot/util/tolower.h
@@ -0,0 +1,57 @@
+/*!
+ * \file tolower.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Table for converting ASCII characters to lowercase.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_TOLOWER_H_
+#define _KNOT_TOLOWER_H_
+
+#include <stdint.h>
+
+/*! \brief Size of the character conversion table. */
+#define KNOT_CHAR_TABLE_SIZE 256
+
+enum {
+	/*! \brief Size of the character conversion table. */
+	CHAR_TABLE_SIZE = KNOT_CHAR_TABLE_SIZE
+};
+
+/*! \brief Character table mapping uppercase letters to lowercase. */
+extern const uint8_t char_table[CHAR_TABLE_SIZE];
+
+/*!
+ * \brief Converts ASCII character to lowercase.
+ * 
+ * \param c ASCII character code.
+ *
+ * \return \a c converted to lowercase (or \a c if not applicable).
+ */
+static inline uint8_t knot_tolower(uint8_t c) {
+#if KNOT_CHAR_TABLE_SIZE < 256
+	assert(c < CHAR_TABLE_SIZE);
+#endif
+	return char_table[c];
+}
+
+#endif /* _KNOT_TOLOWER_H_ */
diff --git a/src/libknot/util/utils.c b/src/libknot/util/utils.c
new file mode 100644
index 0000000..17b33a7
--- /dev/null
+++ b/src/libknot/util/utils.c
@@ -0,0 +1,127 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <string.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "util/utils.h"
+#include "common/WELL1024a.h"
+
+/*----------------------------------------------------------------------------*/
+
+knot_lookup_table_t *knot_lookup_by_name(knot_lookup_table_t *table,
+                                             const char *name)
+{
+	while (table->name != NULL) {
+		if (strcasecmp(name, table->name) == 0) {
+			return table;
+		}
+		table++;
+	}
+
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_lookup_table_t *knot_lookup_by_id(knot_lookup_table_t *table,
+                                           int id)
+{
+	while (table->name != NULL) {
+		if (table->id == id) {
+			return table;
+		}
+		table++;
+	}
+
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+size_t knot_strlcpy(char *dst, const char *src, size_t size)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = size;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0) {
+				break;
+			}
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (size != 0) {
+			*d = '\0';        /* NUL-terminate dst */
+		}
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);        /* count does not include NUL */
+}
+
+/*! \brief TLS key for rand seed. */
+static pthread_key_t _qr_key;
+static pthread_once_t _qr_once = PTHREAD_ONCE_INIT;
+
+/*! \brief TLS key initializer. */
+static void _qr_init()
+{
+	(void) pthread_key_create(&_qr_key, NULL);
+	(void) pthread_setspecific(_qr_key, (void*)time(0));
+}
+
+size_t knot_quick_rand()
+{
+	(void) pthread_once(&_qr_once, _qr_init);
+	size_t x = (size_t)pthread_getspecific(_qr_key);
+
+	/* Numerical Recipes in C.
+	 * The Art of Scientific Computing, 2nd Edition,
+	 * 1992, ISBN 0-521-43108-5.
+	 * Page 284.
+	 */
+	x = 1664525L * x + 1013904223L;
+	(void) pthread_setspecific(_qr_key, (void*)x);
+	return x;
+}
+
+uint16_t knot_random_id()
+{
+	return (uint16_t)(tls_rand() * ((uint16_t)~0));
+}
+
+struct flock* knot_file_lock(short type, short whence)
+{
+	static struct flock ret;
+	ret.l_type = type;
+	ret.l_start = 0;
+	ret.l_whence = whence;
+	ret.l_len = 0;
+	ret.l_pid = getpid();
+	return &ret;
+}
+
diff --git a/src/libknot/util/utils.h b/src/libknot/util/utils.h
new file mode 100644
index 0000000..f43b8f0
--- /dev/null
+++ b/src/libknot/util/utils.h
@@ -0,0 +1,196 @@
+/*!
+ * \file utils.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Various utilities.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_UTILS_H_
+#define _KNOT_UTILS_H_
+
+#include <string.h>
+#include <stdint.h>
+#include <stdio.h>
+
+/*!
+ * \brief A general purpose lookup table.
+ *
+ * \note Taken from NSD.
+ */
+struct knot_lookup_table {
+	int id;
+	const char *name;
+};
+
+typedef struct knot_lookup_table knot_lookup_table_t;
+
+/*!
+ * \brief Looks up the given name in the lookup table.
+ *
+ * \param table Lookup table.
+ * \param name Name to look up.
+ *
+ * \return Item in the lookup table with the given name or NULL if no such is
+ *         present.
+ */
+knot_lookup_table_t *knot_lookup_by_name(knot_lookup_table_t *table,
+                                             const char *name);
+
+/*!
+ * \brief Looks up the given id in the lookup table.
+ *
+ * \param table Lookup table.
+ * \param id ID to look up.
+ *
+ * \return Item in the lookup table with the given id or NULL if no such is
+ *         present.
+ */
+knot_lookup_table_t *knot_lookup_by_id(knot_lookup_table_t *table,
+                                           int id);
+
+/*!
+ * \brief Strlcpy - safe string copy function, based on FreeBSD implementation.
+ *
+ * http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/string/
+ *
+ * \param dst Destination string.
+ * \param src Source string.
+ * \param size How many characters to copy - 1.
+ *
+ * \return strlen(src), if retval >= siz, truncation occurred.
+ */
+size_t knot_strlcpy(char *dst, const char *src, size_t size);
+
+/*
+ * Writing / reading arbitrary data to / from wireformat.
+ */
+
+/*!
+ * \brief Reads 2 bytes from the wireformat data.
+ *
+ * \param pos Data to read the 2 bytes from.
+ *
+ * \return The 2 bytes read, in inverse endian.
+ */
+static inline uint16_t knot_wire_read_u16(const uint8_t *pos)
+{
+	return (pos[0] << 8) | pos[1];
+}
+
+/*!
+ * \brief Reads 4 bytes from the wireformat data.
+ *
+ * \param pos Data to read the 4 bytes from.
+ *
+ * \return The 4 bytes read, in inverse endian.
+ */
+static inline uint32_t knot_wire_read_u32(const uint8_t *pos)
+{
+	return (pos[0] << 24) | (pos[1] << 16) | (pos[2] << 8) | pos[3];
+}
+
+/*!
+ * \brief Reads 6 bytes from the wireformat data.
+ *
+ * \param pos Data to read the 6 bytes from.
+ *
+ * \return The 6 bytes read, in inverse endian.
+ */
+static inline uint64_t knot_wire_read_u48(const uint8_t *pos)
+{
+	return ((uint64_t)(pos[0]) << 40) | ((uint64_t)(pos[1]) << 32) | (pos[2] << 24) |
+	        (pos[3] << 16) | (pos[4] << 8) | pos[5];
+}
+
+/*!
+ * \brief Writes 2 bytes in wireformat.
+ *
+ * The endian of the data is inverted.
+ *
+ * \param pos Position where to put the 2 bytes.
+ * \param data Data to put.
+ */
+static inline void knot_wire_write_u16(uint8_t *pos, uint16_t data)
+{
+	pos[0] = (uint8_t)((data >> 8) & 0xff);
+	pos[1] = (uint8_t)(data & 0xff);
+}
+
+/*!
+ * \brief Writes 4 bytes in wireformat.
+ *
+ * The endian of the data is inverted.
+ *
+ * \param pos Position where to put the 4 bytes.
+ * \param data Data to put.
+ */
+static inline void knot_wire_write_u32(uint8_t *pos, uint32_t data)
+{
+	pos[0] = (uint8_t)((data >> 24) & 0xff);
+	pos[1] = (uint8_t)((data >> 16) & 0xff);
+	pos[2] = (uint8_t)((data >> 8) & 0xff);
+	pos[3] = (uint8_t)(data & 0xff);
+}
+
+/*!
+ * \brief Writes 6 bytes in wireformat.
+ *
+ * The endian of the data is inverted.
+ *
+ * \param pos Position where to put the 4 bytes.
+ * \param data Data to put.
+ */
+static inline void knot_wire_write_u48(uint8_t *pos, uint64_t data)
+{
+	pos[0] = (uint8_t)((data >> 40) & 0xff);
+	pos[1] = (uint8_t)((data >> 32) & 0xff);
+	pos[2] = (uint8_t)((data >> 24) & 0xff);
+	pos[3] = (uint8_t)((data >> 16) & 0xff);
+	pos[4] = (uint8_t)((data >> 8) & 0xff);
+	pos[5] = (uint8_t)(data & 0xff);
+}
+
+/*!
+ * \brief Linear congruential generator.
+ *
+ * Simple pseudorandom generator for general purpose.
+ * \warning Do not use for cryptography.
+ * \return Random number <0, (size_t)~0>
+ */
+size_t knot_quick_rand();
+
+uint16_t knot_random_id();
+
+/*!
+ * \brief Helper function for simple locking.
+ *
+ * \param type Type of lock.
+ * \param type Starting position of lock.
+ *
+ * \return Locking structure.
+ */
+struct flock* knot_file_lock(short type, short whence);
+
+#endif /* _KNOT_UTILS_H_ */
+
+/*! @} */
+
diff --git a/src/libknot/util/wire.h b/src/libknot/util/wire.h
new file mode 100644
index 0000000..0a24ff1
--- /dev/null
+++ b/src/libknot/util/wire.h
@@ -0,0 +1,926 @@
+/*!
+ * \file wire.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Functions for manipulating and parsing raw data in DNS packets.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_WIRE_H_
+#define _KNOT_WIRE_H_
+
+#include <stdint.h>
+#include <assert.h>
+
+#include "util/utils.h"
+
+/*! \brief Offset of DNS header fields in wireformat. */
+enum knot_wire_offsets {
+	KNOT_WIRE_OFFSET_ID = 0,
+	KNOT_WIRE_OFFSET_FLAGS1 = 2,
+	KNOT_WIRE_OFFSET_FLAGS2 = 3,
+	KNOT_WIRE_OFFSET_QDCOUNT = 4,
+	KNOT_WIRE_OFFSET_ANCOUNT = 6,
+	KNOT_WIRE_OFFSET_NSCOUNT = 8,
+	KNOT_WIRE_OFFSET_ARCOUNT = 10
+};
+
+/*! \brief Minimum size for some parts of the DNS packet. */
+enum knot_wire_sizes {
+	KNOT_WIRE_HEADER_SIZE = 12,
+	KNOT_WIRE_QUESTION_MIN_SIZE = 5,
+	KNOT_WIRE_RR_MIN_SIZE = 11
+};
+
+/*
+ * Packet header manipulation functions.
+ */
+
+/*!
+ * \brief Returns the ID from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return DNS packet ID.
+ */
+static inline uint16_t knot_wire_get_id(const uint8_t *packet)
+{
+	return knot_wire_read_u16(packet + KNOT_WIRE_OFFSET_ID);
+}
+
+/*!
+ * \brief Sets the ID to the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param id DNS packet ID.
+ */
+static inline void knot_wire_set_id(uint8_t *packet, uint16_t id)
+{
+	knot_wire_write_u16(packet + KNOT_WIRE_OFFSET_ID, id);
+}
+
+/*!
+ * \brief Returns the first byte of flags from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return First byte of DNS flags.
+ */
+static inline uint8_t knot_wire_get_flags1(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1);
+}
+
+/*!
+ * \brief Sets the first byte of flags to the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param flags1 First byte of the DNS flags.
+ */
+static inline uint8_t knot_wire_set_flags1(uint8_t *packet, uint8_t flags1)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1) = flags1;
+}
+
+/*!
+ * \brief Returns the second byte of flags from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Second byte of DNS flags.
+ */
+static inline uint8_t knot_wire_get_flags2(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2);
+}
+
+/*!
+ * \brief Sets the second byte of flags to the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param flags2 Second byte of the DNS flags.
+ */
+static inline uint8_t knot_wire_set_flags2(uint8_t *packet, uint8_t flags2)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2) = flags2;
+}
+
+/*!
+ * \brief Returns the QDCOUNT (count of Question entries) from wire format of
+ *        the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return QDCOUNT (count of Question entries in the packet).
+ */
+static inline uint16_t knot_wire_get_qdcount(const uint8_t *packet)
+{
+	return knot_wire_read_u16(packet + KNOT_WIRE_OFFSET_QDCOUNT);
+}
+
+/*!
+ * \brief Sets the QDCOUNT (count of Question entries) to wire format of the
+ *        packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param qdcount QDCOUNT (count of Question entries in the packet).
+ */
+static inline void knot_wire_set_qdcount(uint8_t *packet, uint16_t qdcount)
+{
+	knot_wire_write_u16(packet + KNOT_WIRE_OFFSET_QDCOUNT, qdcount);
+}
+
+/*!
+ * \brief Returns the ANCOUNT (count of Answer entries) from wire format of
+ *        the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return ANCOUNT (count of Answer entries in the packet).
+ */
+static inline uint16_t knot_wire_get_ancount(const uint8_t *packet)
+{
+	return knot_wire_read_u16(packet + KNOT_WIRE_OFFSET_ANCOUNT);
+}
+
+/*!
+ * \brief Sets the ANCOUNT (count of Answer entries) to wire format of the
+ *        packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param ancount ANCOUNT (count of Answer entries in the packet).
+ */
+static inline void knot_wire_set_ancount(uint8_t *packet, uint16_t ancount)
+{
+	knot_wire_write_u16(packet + KNOT_WIRE_OFFSET_ANCOUNT, ancount);
+}
+
+/*!
+ * \brief Returns the NSCOUNT (count of Authority entries) from wire format of
+ *        the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return NSCOUNT (count of Authority entries in the packet).
+ */
+static inline uint16_t knot_wire_get_nscount(const uint8_t *packet)
+{
+	return knot_wire_read_u16(packet + KNOT_WIRE_OFFSET_NSCOUNT);
+}
+
+/*!
+ * \brief Sets the NSCOUNT (count of Authority entries) to wire format of the
+ *        packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param nscount NSCOUNT (count of Authority entries in the packet).
+ */
+static inline void knot_wire_set_nscount(uint8_t *packet, uint16_t nscount)
+{
+	knot_wire_write_u16(packet + KNOT_WIRE_OFFSET_NSCOUNT, nscount);
+}
+
+/*!
+ * \brief Returns the ARCOUNT (count of Additional entries) from wire format of
+ *        the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return ARCOUNT (count of Additional entries in the packet).
+ */
+static inline uint16_t knot_wire_get_arcount(const uint8_t *packet)
+{
+	return knot_wire_read_u16(packet + KNOT_WIRE_OFFSET_ARCOUNT);
+}
+
+/*!
+ * \brief Sets the ARCOUNT (count of Additional entries) to wire format of the
+ *        packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param arcount ARCOUNT (count of Additional entries in the packet).
+ */
+static inline void knot_wire_set_arcount(uint8_t *packet, uint16_t arcount)
+{
+	knot_wire_write_u16(packet + KNOT_WIRE_OFFSET_ARCOUNT, arcount);
+}
+
+/*
+ * Packet header flags manipulation functions.
+ */
+/*! \brief Constants for DNS header flags in the first flags byte. */
+enum knot_wire_flags1_consts {
+	KNOT_WIRE_RD_MASK = (uint8_t)0x01U,      /*!< RD bit mask. */
+	KNOT_WIRE_RD_SHIFT = 0,                  /*!< RD bit shift. */
+	KNOT_WIRE_TC_MASK = (uint8_t)0x02U,      /*!< TC bit mask. */
+	KNOT_WIRE_TC_SHIFT = 1,                  /*!< TC bit shift. */
+	KNOT_WIRE_AA_MASK = (uint8_t)0x04U,      /*!< AA bit mask. */
+	KNOT_WIRE_AA_SHIFT = 2,                  /*!< AA bit shift. */
+	KNOT_WIRE_OPCODE_MASK = (uint8_t)0x78U,  /*!< OPCODE mask. */
+	KNOT_WIRE_OPCODE_SHIFT = 3,              /*!< OPCODE shift. */
+	KNOT_WIRE_QR_MASK = (uint8_t)0x80U,      /*!< QR bit mask. */
+	KNOT_WIRE_QR_SHIFT = 7                   /*!< QR bit shift. */
+};
+
+/*! \brief Constants for DNS header flags in the second flags byte. */
+enum knot_wire_flags2_consts {
+	KNOT_WIRE_RCODE_MASK = (uint8_t)0x0fU,  /*!< RCODE mask. */
+	KNOT_WIRE_RCODE_SHIFT = 0,              /*!< RCODE shift. */
+	KNOT_WIRE_CD_MASK = (uint8_t)0x10U,     /*!< CD bit mask. */
+	KNOT_WIRE_CD_SHIFT = 4,                 /*!< CD bit shift. */
+	KNOT_WIRE_AD_MASK = (uint8_t)0x20U,     /*!< AD bit mask. */
+	KNOT_WIRE_AD_SHIFT = 5,                 /*!< AD bit shift. */
+	KNOT_WIRE_Z_MASK = (uint8_t)0x40U,      /*!< Zero bit mask. */
+	KNOT_WIRE_Z_SHIFT = 6,                  /*!< Zero bit shift. */
+	KNOT_WIRE_RA_MASK = (uint8_t)0x80U,     /*!< RA bit mask. */
+	KNOT_WIRE_RA_SHIFT = 7                  /*!< RA bit shift. */
+};
+
+/*
+ * Functions for getting / setting / clearing flags and codes directly in packet
+ */
+
+/*!
+ * \brief Returns the RD bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the RD bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_rd(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1) & KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Sets the RD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_rd(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) |= KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Clears the RD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_flags_clear_rd(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) &= ~KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Returns the TC bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the TC bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_tc(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1) & KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Sets the TC bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_tc(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) |= KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Clears the TC bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_tc(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) &= ~KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Returns the AA bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the AA bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_aa(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1) & KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Sets the AA bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_aa(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) |= KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Clears the AA bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_aa(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) &= ~KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Returns the OPCODE from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return OPCODE of the packet.
+ */
+static inline uint8_t knot_wire_get_opcode(const uint8_t *packet)
+{
+	return (*(packet + KNOT_WIRE_OFFSET_FLAGS1)
+	        & KNOT_WIRE_OPCODE_MASK) >> KNOT_WIRE_OPCODE_SHIFT;
+}
+
+/*!
+ * \brief Sets the OPCODE in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param opcode OPCODE to set.
+ */
+static inline void knot_wire_set_opcode(uint8_t *packet, short opcode)
+{
+	uint8_t *flags1 = packet + KNOT_WIRE_OFFSET_FLAGS1;
+	*flags1 = (*flags1 & ~KNOT_WIRE_OPCODE_MASK)
+	          | ((opcode) << KNOT_WIRE_OPCODE_SHIFT);
+}
+
+/*!
+ * \brief Returns the QR bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the QR bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_qr(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS1) & KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Sets the QR bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_qr(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) |= KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Clears the QR bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_qr(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS1) &= ~KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Returns the RCODE from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return RCODE of the packet.
+ */
+static inline uint8_t knot_wire_get_rcode(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2)
+	       & KNOT_WIRE_RCODE_MASK;
+}
+
+/*!
+ * \brief Sets the RCODE in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ * \param rcode RCODE to set.
+ */
+static inline void knot_wire_set_rcode(uint8_t *packet, short rcode)
+{
+	uint8_t *flags2 = packet + KNOT_WIRE_OFFSET_FLAGS2;
+	*flags2 = (*flags2 & ~KNOT_WIRE_RCODE_MASK) | (rcode);
+}
+
+/*!
+ * \brief Returns the CD bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the CD bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_cd(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2) & KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Sets the CD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_cd(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) |= KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Clears the CD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_cd(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) &= ~KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Returns the AD bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the AD bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_ad(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2) & KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Sets the AD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_ad(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) |= KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Clears the AD bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_ad(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) &= ~KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Returns the Zero bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the Zero bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_z(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2) & KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Sets the Zero bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_z(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) |= KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Clears the Zero bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_z(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) &= ~KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Returns the RA bit from wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ *
+ * \return Flags with only the RA bit according to its setting in the packet.
+ */
+static inline uint8_t knot_wire_get_ra(const uint8_t *packet)
+{
+	return *(packet + KNOT_WIRE_OFFSET_FLAGS2) & KNOT_WIRE_RA_MASK;
+}
+
+/*!
+ * \brief Sets the RA bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_set_ra(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) |= KNOT_WIRE_RA_MASK;
+}
+
+/*!
+ * \brief Clears the RA bit in the wire format of the packet.
+ *
+ * \param packet Wire format of the packet.
+ */
+static inline void knot_wire_clear_ra(uint8_t *packet)
+{
+	*(packet + KNOT_WIRE_OFFSET_FLAGS2) &= ~KNOT_WIRE_RA_MASK;
+}
+
+/*
+ * Functions for getting / setting / clearing flags in flags variable
+ */
+
+/*!
+ * \brief Returns the RD bit from the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ *
+ * \return Flags byte with only the RD bit according to its setting in
+ *         \a flags1.
+ */
+static inline uint8_t knot_wire_flags_get_rd(uint8_t flags1)
+{
+	return flags1 & KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Sets the RD bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_rd(uint8_t *flags1)
+{
+	*flags1 |= KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Clears the RD bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_flags_clear_rd(uint8_t *flags1)
+{
+	*flags1 &= ~KNOT_WIRE_RD_MASK;
+}
+
+/*!
+ * \brief Returns the TC bit from the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ *
+ * \return Flags byte with only the TC bit according to its setting in
+ *         \a flags1.
+ */
+static inline uint8_t knot_wire_flags_get_tc(uint8_t flags1)
+{
+	return flags1 & KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Sets the TC bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_tc(uint8_t *flags1)
+{
+	*flags1 |= KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Clears the TC bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_tc(uint8_t *flags1)
+{
+	*flags1 &= ~KNOT_WIRE_TC_MASK;
+}
+
+/*!
+ * \brief Returns the AA bit from the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ *
+ * \return Flags byte with only the AA bit according to its setting in
+ *         \a flags1.
+ */
+static inline uint8_t knot_wire_flags_get_aa(uint8_t flags1)
+{
+	return flags1 & KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Sets the AA bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_aa(uint8_t *flags1)
+{
+	*flags1 |= KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Clears the AA bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_aa(uint8_t *flags1)
+{
+	*flags1 &= ~KNOT_WIRE_AA_MASK;
+}
+
+/*!
+ * \brief Returns the OPCODE from the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ *
+ * \return OPCODE
+ */
+static inline uint8_t knot_wire_flags_get_opcode(uint8_t flags1)
+{
+	return (flags1 & KNOT_WIRE_OPCODE_MASK)
+	        >> KNOT_WIRE_OPCODE_SHIFT;
+}
+
+/*!
+ * \brief Sets the OPCODE in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ * \param opcode OPCODE to set.
+ */
+static inline void knot_wire_flags_set_opcode(uint8_t *flags1, short opcode)
+{
+	*flags1 = (*flags1 & ~KNOT_WIRE_OPCODE_MASK)
+	          | ((opcode) << KNOT_WIRE_OPCODE_SHIFT);
+}
+
+/*!
+ * \brief Returns the QR bit from the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ *
+ * \return Flags byte with only the QR bit according to its setting in
+ *         \a flags1.
+ */
+static inline uint8_t knot_wire_flags_get_qr(uint8_t flags1)
+{
+	return flags1 & KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Sets the QR bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_qr(uint8_t *flags1)
+{
+	*flags1 |= KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Clears the QR bit in the first byte of flags.
+ *
+ * \param flags1 First byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_qr(uint8_t *flags1)
+{
+	*flags1 &= ~KNOT_WIRE_QR_MASK;
+}
+
+/*!
+ * \brief Returns the RCODE from the second byte of flags.
+ *
+ * \param flags2 First byte of DNS header flags.
+ *
+ * \return RCODE
+ */
+static inline uint8_t knot_wire_flags_get_rcode(uint8_t flags2)
+{
+	return flags2 & KNOT_WIRE_RCODE_MASK;
+}
+
+/*!
+ * \brief Sets the RCODE in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ * \param rcode RCODE to set.
+ */
+static inline void knot_wire_flags_set_rcode(uint8_t *flags2, short rcode)
+{
+	*flags2 = (*flags2 & ~KNOT_WIRE_RCODE_MASK) | (rcode);
+}
+
+/*!
+ * \brief Returns the CD bit from the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ *
+ * \return Flags byte with only the CD bit according to its setting in
+ *         \a flags2.
+ */
+static inline uint8_t knot_wire_flags_get_cd(uint8_t flags2)
+{
+	return flags2 & KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Sets the CD bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_cd(uint8_t *flags2)
+{
+	*flags2 |= KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Clears the CD bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_cd(uint8_t *flags2)
+{
+	*flags2 &= ~KNOT_WIRE_CD_MASK;
+}
+
+/*!
+ * \brief Returns the AD bit from the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ *
+ * \return Flags byte with only the AD bit according to its setting in
+ *         \a flags2.
+ */
+static inline uint8_t knot_wire_flags_get_ad(uint8_t flags2)
+{
+	return flags2 & KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Sets the AD bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_ad(uint8_t *flags2)
+{
+	*flags2 |= KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Clears the AD bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_ad(uint8_t *flags2)
+{
+	*flags2 &= ~KNOT_WIRE_AD_MASK;
+}
+
+/*!
+ * \brief Returns the Zero bit from the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ *
+ * \return Flags byte with only the Zero bit according to its setting in
+ *         \a flags2.
+ */
+static inline uint8_t knot_wire_flags_get_z(uint8_t flags2)
+{
+	return flags2 & KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Sets the Zero bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_z(uint8_t *flags2)
+{
+	*flags2 |= KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Clears the Zero bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_z(uint8_t *flags2)
+{
+	*flags2 &= ~KNOT_WIRE_Z_MASK;
+}
+
+/*!
+ * \brief Returns the RA bit from the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ *
+ * \return Flags byte with only the RA bit according to its setting in
+ *         \a flags2.
+ */
+static inline uint8_t knot_wire_flags_get_ra(uint8_t flags2)
+{
+	return flags2 & KNOT_WIRE_RA_MASK;
+}
+
+/*!
+ * \brief Sets the RA bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_set_ra(uint8_t *flags2)
+{
+	*flags2 |= KNOT_WIRE_RA_MASK;
+}
+
+/*!
+ * \brief Clears the RA bit in the second byte of flags.
+ *
+ * \param flags2 Second byte of DNS header flags.
+ */
+static inline void knot_wire_flags_clear_ra(uint8_t *flags2)
+{
+	*flags2 &= ~KNOT_WIRE_RA_MASK;
+}
+
+/*
+ * Pointer manipulation
+ */
+
+enum knot_wire_pointer_consts {
+	/*! \brief DNS packet pointer designation (first two bits set to 1).  */
+	KNOT_WIRE_PTR = (uint8_t)0xc0U
+};
+
+/*!
+ * \brief Creates a DNS packet pointer and stores it in wire format.
+ *
+ * \param pos Position where tu put the pointer.
+ * \param ptr Relative position of the item to which the pointer should point in
+ *            the wire format of the packet.
+ */
+static inline void knot_wire_put_pointer(uint8_t *pos, size_t ptr)
+{
+	uint16_t p = ptr;
+	knot_wire_write_u16(pos, p);
+	assert((pos[0] & KNOT_WIRE_PTR) == 0);
+	pos[0] |= KNOT_WIRE_PTR;
+}
+
+static inline int knot_wire_is_pointer(const uint8_t *pos)
+{
+	return ((pos[0] & KNOT_WIRE_PTR) != 0);
+}
+
+static inline size_t knot_wire_get_pointer(const uint8_t *pos)
+{
+	/*! \todo memcpy() is not needed, may be directly assigned. */
+	uint16_t p = 0;
+	memcpy(&p, pos, 2);
+	p &= ~KNOT_WIRE_PTR;
+
+	uint16_t p2 = knot_wire_read_u16((uint8_t *)&p);
+	return p2;
+}
+
+#endif /* _KNOT_WIRE_H_ */
+
+/*! @} */
diff --git a/src/libknot/zone/dname-table.c b/src/libknot/zone/dname-table.c
new file mode 100644
index 0000000..c41b4bd
--- /dev/null
+++ b/src/libknot/zone/dname-table.c
@@ -0,0 +1,310 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+
+#include "zone/dname-table.h"
+#include "util/error.h"
+
+/*!< Tree functions. */
+TREE_DEFINE(dname_table_node, avl);
+
+struct knot_dname_table_fnc_data {
+	void (*func)(knot_dname_t *dname, void *data);
+	void *data;
+};
+
+static void knot_dname_table_apply(struct dname_table_node *node, void *data)
+{
+	assert(data != NULL);
+	assert(node != NULL);
+	struct knot_dname_table_fnc_data *d =
+			(struct knot_dname_table_fnc_data *)data;
+	d->func(node->dname, d->data);
+}
+
+/*!
+ * \brief Comparison function to be used with tree.
+ *
+ * \param n1 First dname to be compared.
+ * \param n2 Second dname to be compared.
+ *
+ * \return strncmp of dname's wireformats.
+ */
+static int compare_dname_table_nodes(struct dname_table_node *n1,
+				     struct dname_table_node *n2)
+{
+	assert(n1 && n2);
+	return (strncmp((char *)n1->dname->name, (char *)n2->dname->name,
+			(n1->dname->size < n2->dname->size) ?
+			(n1->dname->size):(n2->dname->size)));
+}
+
+/*!
+ * \brief Deletes tree node along with its domain name.
+ *
+ * \param node Node to be deleted.
+ * \param data If <> 0, dname in the node will be freed as well.
+ */
+static void delete_dname_table_node(struct dname_table_node *node, void *data)
+{
+	if ((ssize_t)data == 1) {
+		knot_dname_release(node->dname);
+	} else if ((ssize_t)data == 2) {
+		knot_dname_free(&node->dname);
+	}
+
+	/*!< \todo it would be nice to set pointers to NULL. */
+	free(node);
+}
+
+static void knot_dname_table_delete_subtree(struct dname_table_node *root)
+{
+	if (root == NULL) {
+		return;
+	}
+
+	knot_dname_table_delete_subtree(root->avl.avl_left);
+	knot_dname_table_delete_subtree(root->avl.avl_right);
+	free(root);
+}
+
+static int knot_dname_table_copy_node(const struct dname_table_node *from,
+                                        struct dname_table_node **to)
+{
+	if (from == NULL) {
+		return KNOT_EOK;
+	}
+
+	*to = (struct dname_table_node *)
+	      malloc(sizeof(struct dname_table_node));
+	if (*to == NULL) {
+		return KNOT_ENOMEM;
+	}
+	memset(*to, 0, sizeof(struct dname_table_node));
+
+	(*to)->dname = from->dname;
+	knot_dname_retain((*to)->dname);
+	(*to)->avl.avl_height = from->avl.avl_height;
+
+	int ret = knot_dname_table_copy_node(from->avl.avl_left,
+	                                       &(*to)->avl.avl_left);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	ret = knot_dname_table_copy_node(from->avl.avl_right,
+	                                   &(*to)->avl.avl_right);
+	if (ret != KNOT_EOK) {
+		knot_dname_table_delete_subtree((*to)->avl.avl_left);
+		(*to)->avl.avl_left = NULL;
+		return ret;
+	}
+
+	return KNOT_EOK;
+}
+
+knot_dname_table_t *knot_dname_table_new()
+{
+	knot_dname_table_t *ret = malloc(sizeof(knot_dname_table_t));
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	ret->tree = malloc(sizeof(table_tree_t));
+	if (ret->tree == NULL) {
+		ERR_ALLOC_FAILED;
+		free(ret);
+		return NULL;
+	}
+
+	TREE_INIT(ret->tree, compare_dname_table_nodes);
+
+	ret->id_counter = 1;
+
+	return ret;
+}
+
+knot_dname_t *knot_dname_table_find_dname(const knot_dname_table_t *table,
+					      knot_dname_t *dname)
+{
+	if (table == NULL || dname == NULL) {
+		return NULL;
+	}
+
+	struct dname_table_node *node = NULL;
+	struct dname_table_node sought;
+	sought.dname = dname;
+
+	node = TREE_FIND(table->tree, dname_table_node, avl, &sought);
+
+	if (node == NULL) {
+		return NULL;
+	} else {
+		/* Increase reference counter. */
+		knot_dname_retain(node->dname);
+
+		return node->dname;
+	}
+}
+
+int knot_dname_table_add_dname(knot_dname_table_t *table,
+                               knot_dname_t *dname)
+{
+	if (dname == NULL || table == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	/* Node for insertion has to be created */
+	struct dname_table_node *node =
+		malloc(sizeof(struct dname_table_node));
+	CHECK_ALLOC_LOG(node, KNOT_ENOMEM);
+	
+	// convert the dname to lowercase
+	knot_dname_to_lower(dname);
+
+	node->dname = dname;
+	node->avl.avl_height = 0;
+	node->avl.avl_left = NULL;
+	node->avl.avl_right = NULL;
+
+	node->dname->id = table->id_counter++;
+	assert(node->dname->id != 0);
+
+	/* Increase reference counter. */
+	knot_dname_retain(dname);
+
+	TREE_INSERT(table->tree, dname_table_node, avl, node);
+	return KNOT_EOK;
+}
+
+int knot_dname_table_add_dname_check(knot_dname_table_t *table,
+                                     knot_dname_t **dname)
+{
+	knot_dname_t *found_dname = NULL;
+
+	if (table == NULL || dname == NULL || *dname == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	/* Fetch dname, need to release it later. */
+	found_dname = knot_dname_table_find_dname(table ,*dname);
+
+	if (!found_dname) {
+		/* Store reference in table. */
+		return knot_dname_table_add_dname(table, *dname);
+	} else {
+		/*! \todo Remove the check for equality. */
+		if (found_dname != *dname) {
+			/* Replace dname with found. */
+			knot_dname_release(*dname);
+			*dname = found_dname;
+			return 1; /*! \todo Error code? */
+
+		} else {
+
+			/* If the dname is already in the table, there is already
+			 * a reference to it.
+			 */
+			knot_dname_release(found_dname);
+		}
+	}
+
+	return KNOT_EOK;
+}
+
+int knot_dname_table_shallow_copy(knot_dname_table_t *from,
+                                    knot_dname_table_t *to)
+{
+	to->id_counter = from->id_counter;
+
+	if (to->tree == NULL) {
+		to->tree = malloc(sizeof(table_tree_t));
+		if (to->tree == NULL) {
+			ERR_ALLOC_FAILED;
+			return KNOT_ENOMEM;
+		}
+
+		TREE_INIT(to->tree, compare_dname_table_nodes);
+	}
+
+	return knot_dname_table_copy_node(from->tree->th_root,
+	                                    &to->tree->th_root);
+}
+
+void knot_dname_table_free(knot_dname_table_t **table)
+{
+	if (table == NULL || *table == NULL) {
+		return;
+	}
+
+	/* Walk the tree and free each node, but not the dnames. */
+	TREE_POST_ORDER_APPLY((*table)->tree, dname_table_node, avl,
+			      delete_dname_table_node, 0);
+	
+	free((*table)->tree);
+
+	free(*table);
+	*table = NULL;
+}
+
+void knot_dname_table_deep_free(knot_dname_table_t **table)
+{
+	if (table == NULL || *table == NULL) {
+		return;
+	}
+
+	/* Walk the tree and free each node, but free the dnames. */
+	TREE_POST_ORDER_APPLY((*table)->tree, dname_table_node, avl,
+			      delete_dname_table_node, (void *) 1);
+
+	free((*table)->tree);
+
+	free(*table);
+	*table = NULL;
+}
+
+void knot_dname_table_destroy(knot_dname_table_t **table)
+{
+	if (table == NULL || *table == NULL) {
+		return;
+	}
+
+	/* Walk the tree and free each node, but free the dnames. */
+	TREE_POST_ORDER_APPLY((*table)->tree, dname_table_node, avl,
+			      delete_dname_table_node, (void *) 2);
+
+	free((*table)->tree);
+
+	free(*table);
+	*table = NULL;
+}
+
+void knot_dname_table_tree_inorder_apply(const knot_dname_table_t *table,
+            void (*applied_function)(knot_dname_t *node,
+                                     void *data),
+            void *data)
+{
+	struct knot_dname_table_fnc_data d;
+	d.data = data;
+	d.func = applied_function;
+
+	TREE_FORWARD_APPLY(table->tree, dname_table_node, avl,
+	                   knot_dname_table_apply, &d);
+}
+
diff --git a/src/libknot/zone/dname-table.h b/src/libknot/zone/dname-table.h
new file mode 100644
index 0000000..dd86eaf
--- /dev/null
+++ b/src/libknot/zone/dname-table.h
@@ -0,0 +1,168 @@
+/*!
+ * \file dname-table.h
+ *
+ * \author Jan Kadlec <jan.kadlec.@nic.cz>
+ *
+ * \brief Structures representing dname table and functions for
+ *        manipulating these structures.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_DNAME_TABLE_H_
+#define _KNOT_DNAME_TABLE_H_
+
+#include <config.h>
+
+#include "common/tree.h"
+
+#include "dname.h"
+#include "common.h"
+
+
+/*!
+ * \brief Structure encapsulating
+ */
+struct dname_table_node {
+	knot_dname_t *dname; /*!< Dname stored in node. */
+	TREE_ENTRY(dname_table_node) avl; /*!< Tree variables. */
+};
+
+/*!
+ * \brief Tree structure.
+ */
+typedef TREE_HEAD(avl, dname_table_node) table_tree_t;
+
+/*!
+ * \brief Structure holding tree together with dname ID counter.
+ */
+struct knot_dname_table {
+	unsigned int id_counter; /*!< ID counter (starts from 1) */
+	table_tree_t *tree;  /*!< AVL tree */
+};
+
+typedef struct knot_dname_table knot_dname_table_t;
+
+/*!
+ * \brief Creates new empty domain name table.
+ *
+ * \retval Created table on success.
+ * \retval NULL on memory error.
+ */
+knot_dname_table_t *knot_dname_table_new();
+
+/*!
+ * \brief Finds name in the domain name table.
+ *
+ * \note Reference count to dname will be incremented, caller is responsible
+ *       for releasing it.
+ *
+ * \param table Domain name table to be searched.
+ * \param dname Dname to be searched.
+ *
+ * \retval Pointer to found dname when dname is present in the table.
+ * \retval NULL when dname is not present.
+ */
+knot_dname_t *knot_dname_table_find_dname(const knot_dname_table_t *table,
+					      knot_dname_t *dname);
+
+/*!
+ * \brief Adds domain name to domain name table.
+ *
+ * \param table Domain name table to be added to.
+ * \param dname Domain name to be added.
+ *
+ * \warning Function does not check for duplicates!
+ *
+ * \note This function encapsulates dname in a structure and saves it to a tree.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_ENOMEM when memory runs out.
+ */
+int knot_dname_table_add_dname(knot_dname_table_t *table,
+                               knot_dname_t *dname);
+
+/*!
+ * \brief Adds domain name to domain name table and checks for duplicates.
+ *
+ * \param table Domain name table to be added to.
+ * \param dname Domain name to be added.
+ *
+ * \note This function encapsulates dname in a structure and saves it to a tree.
+ * \note If a duplicate is found, \a dname is replaced by the name from table.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_ENOMEM when memory runs out.
+ */
+int knot_dname_table_add_dname_check(knot_dname_table_t *table,
+                                     knot_dname_t **dname);
+
+/*!
+ * \brief Creates a shallow copy of the domain name table.
+ *
+ * Expects an existing knot_dname_table_t structure to be passed via \a to,
+ * and fills it with the same data (domain names) as the original. Actual
+ * tree nodes are created, but domain names are not copied (just referenced).
+ *
+ * \param from Original domain name table.
+ * \param to Copy of the domain name table.
+ */
+int knot_dname_table_shallow_copy(knot_dname_table_t *from,
+                                    knot_dname_table_t *to);
+
+/*!
+ * \brief Frees dname table without its nodes. Sets pointer to NULL.
+ *
+ * \param table Table to be freed.
+ */
+void knot_dname_table_free(knot_dname_table_t **table);
+
+/*!
+ * \brief Frees dname table and all its nodes (and release dnames in the nodes)
+ *        Sets pointer to NULL.
+ *
+ * \param table Table to be freed.
+ */
+void knot_dname_table_deep_free(knot_dname_table_t **table);
+
+/*!
+ * \brief Frees dname table and all its nodes (including dnames in the nodes)
+ *        Sets pointer to NULL.
+ *
+ * \param table Table to be freed.
+ */
+void knot_dname_table_destroy(knot_dname_table_t **table);
+
+/*!
+ * \brief Encapsulation of domain name table tree traversal function.
+ *
+ * \param table Table containing tree to be traversed.
+ * \param applied_function Function to be used to process nodes.
+ * \param data Data to be passed to processing function.
+ */
+void knot_dname_table_tree_inorder_apply(const knot_dname_table_t *table,
+            void (*applied_function)(knot_dname_t *dname,
+                                     void *data),
+            void *data);
+
+
+#endif // _KNOT_DNAME_TABLE_H_
+
+/*! @} */
+
diff --git a/src/libknot/zone/node.c b/src/libknot/zone/node.c
new file mode 100644
index 0000000..1d2f938
--- /dev/null
+++ b/src/libknot/zone/node.c
@@ -0,0 +1,906 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include <urcu.h>
+
+#include "common.h"
+#include "zone/node.h"
+#include "rrset.h"
+#include "util/error.h"
+#include "common/skip-list.h"
+#include "common/tree.h"
+#include "util/debug.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns the delegation point flag
+ *
+ * \param flags Flags to retrieve the flag from.
+ *
+ * \return A byte with only the delegation point flag set if it was set in
+ *         \a flags.
+ */
+static inline uint8_t knot_node_flags_get_deleg(uint8_t flags)
+{
+	return flags & KNOT_NODE_FLAGS_DELEG;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets the delegation point flag.
+ *
+ * \param flags Flags to set the flag in.
+ */
+static inline void knot_node_flags_set_deleg(uint8_t *flags)
+{
+	*flags |= KNOT_NODE_FLAGS_DELEG;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns the non-authoritative node flag
+ *
+ * \param flags Flags to retrieve the flag from.
+ *
+ * \return A byte with only the non-authoritative node flag set if it was set in
+ *         \a flags.
+ */
+static inline uint8_t knot_node_flags_get_nonauth(uint8_t flags)
+{
+	return flags & KNOT_NODE_FLAGS_NONAUTH;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets the non-authoritative node flag.
+ *
+ * \param flags Flags to set the flag in.
+ */
+static inline void knot_node_flags_set_nonauth(uint8_t *flags)
+{
+	*flags |= KNOT_NODE_FLAGS_NONAUTH;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns the old node flag
+ *
+ * \param flags Flags to retrieve the flag from.
+ *
+ * \return A byte with only the old node flag set if it was set in \a flags.
+ */
+static inline uint8_t knot_node_flags_get_old(uint8_t flags)
+{
+	return flags & KNOT_NODE_FLAGS_OLD;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets the old node flag.
+ *
+ * \param flags Flags to set the flag in.
+ */
+static inline void knot_node_flags_set_new(uint8_t *flags)
+{
+	*flags |= KNOT_NODE_FLAGS_NEW;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Returns the new node flag
+ *
+ * \param flags Flags to retrieve the flag from.
+ *
+ * \return A byte with only the new node flag set if it was set in \a flags.
+ */
+static inline uint8_t knot_node_flags_get_new(uint8_t flags)
+{
+	return flags & KNOT_NODE_FLAGS_NEW;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Sets the new node flag.
+ *
+ * \param flags Flags to set the flag in.
+ */
+static inline void knot_node_flags_set_old(uint8_t *flags)
+{
+	*flags |= KNOT_NODE_FLAGS_OLD;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static inline void knot_node_flags_clear_new(uint8_t *flags)
+{
+	*flags &= ~KNOT_NODE_FLAGS_NEW;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static inline void knot_node_flags_clear_old(uint8_t *flags)
+{
+	*flags &= ~KNOT_NODE_FLAGS_OLD;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Compares the two keys as RR types.
+ *
+ * \note This function may be used in data structures requiring generic
+ *       comparation function.
+ *
+ * \param key1 First RR type.
+ * \param key2 Second RR type.
+ *
+ * \retval 0 if \a key1 is equal to \a key2.
+ * \retval < 0 if \a key1 is lower than \a key2.
+ * \retval > 0 if \a key1 is higher than \a key2.
+ */
+static int compare_rrset_types(void *rr1, void *rr2)
+{
+	knot_rrset_t *rrset1 = (knot_rrset_t *)rr1;
+	knot_rrset_t *rrset2 = (knot_rrset_t *)rr2;
+	return ((rrset1->type > rrset2->type) ? 1 :
+	        (rrset1->type == rrset2->type) ? 0 : -1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_node_zone_gen_is_new(const knot_node_t *node)
+{
+	assert(node->zone != NULL);
+	knot_zone_contents_t *cont = rcu_dereference(node->zone->contents);
+	assert(cont != NULL);
+	return knot_zone_contents_gen_is_new(cont);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_node_zone_gen_is_old(const knot_node_t *node)
+{
+	assert(node->zone != NULL);
+	knot_zone_contents_t *cont = rcu_dereference(node->zone->contents);
+	assert(cont != NULL);
+	return knot_zone_contents_gen_is_old(cont);
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_node_new(knot_dname_t *owner, knot_node_t *parent,
+                               uint8_t flags)
+{
+	knot_node_t *ret = (knot_node_t *)calloc(1, sizeof(knot_node_t));
+	if (ret == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+	/* Store reference to owner. */
+	knot_dname_retain(owner);
+	ret->owner = owner;
+	knot_node_set_parent(ret, parent);
+	ret->rrset_tree = gen_tree_new(compare_rrset_types);
+	ret->flags = flags;
+	
+	assert(ret->children == 0);
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_add_rrset(knot_node_t *node, knot_rrset_t *rrset,
+                          int merge)
+{
+	int ret = 0;
+
+	if ((ret = (gen_tree_add(node->rrset_tree, rrset,
+	                         (merge) ? knot_rrset_merge : NULL))) < 0) {
+		dbg_node("Failed to add rrset to node->rrset_tree.\n");
+		return KNOT_ERROR;
+	}
+
+	if (ret >= 0) {
+		node->rrset_count += (ret > 0 ? 0 : 1);
+		return ret;
+	} else {
+		return KNOT_ERROR;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t *knot_node_rrset(const knot_node_t *node,
+                                        uint16_t type)
+{
+	assert(node != NULL);
+	assert(node->rrset_tree != NULL);
+	knot_rrset_t rrset;
+	rrset.type = type;
+	return (const knot_rrset_t *)gen_tree_find(node->rrset_tree, &rrset);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rrset_t *knot_node_get_rrset(knot_node_t *node, uint16_t type)
+{
+	knot_rrset_t rrset;
+	rrset.type = type;
+	return (knot_rrset_t *)gen_tree_find(node->rrset_tree, &rrset);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_rrset_t *knot_node_remove_rrset(knot_node_t *node, uint16_t type)
+{
+	knot_rrset_t dummy_rrset;
+	dummy_rrset.type = type;
+	knot_rrset_t *rrset =
+		(knot_rrset_t *)gen_tree_find(node->rrset_tree, &dummy_rrset);
+	if (rrset != NULL) {
+		gen_tree_remove(node->rrset_tree, rrset);
+		node->rrset_count--;
+	}
+	return rrset;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_remove_all_rrsets(knot_node_t *node)
+{
+	// remove RRSets but do not delete them
+	gen_tree_clear(node->rrset_tree);
+	node->rrset_count = 0;
+
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_node_rrset_count(const knot_node_t *node)
+{
+	return node->rrset_count;
+}
+
+/*----------------------------------------------------------------------------*/
+
+struct knot_node_save_rrset_arg {
+	knot_rrset_t **array;
+	size_t count;
+};
+
+static void save_rrset_to_array(void *node, void *data)
+{
+	knot_rrset_t *rrset = (knot_rrset_t *)node;
+	struct knot_node_save_rrset_arg *args =
+		(struct knot_node_save_rrset_arg *)data;
+	args->array[args->count++] = rrset;
+}
+
+knot_rrset_t **knot_node_get_rrsets(const knot_node_t *node)
+{
+//	knot_node_dump(node, 1);
+	if (node->rrset_count == 0) {
+		return NULL;
+	}
+	knot_rrset_t **rrsets = (knot_rrset_t **)malloc(
+		node->rrset_count * sizeof(knot_rrset_t *));
+	CHECK_ALLOC_LOG(rrsets, NULL);
+	struct knot_node_save_rrset_arg args;
+	args.array = rrsets;
+	args.count = 0;
+
+	gen_tree_apply_inorder(node->rrset_tree, save_rrset_to_array,
+	                       &args);
+
+	assert(args.count == node->rrset_count);
+
+	return rrsets;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_rrset_t **knot_node_rrsets(const knot_node_t *node)
+{
+	//knot_node_dump((knot_node_t *)node, (void*)1);
+	if (node->rrset_count == 0) {
+		return NULL;
+	}
+	
+	knot_rrset_t **rrsets = (knot_rrset_t **)malloc(
+		node->rrset_count * sizeof(knot_rrset_t *));
+	CHECK_ALLOC_LOG(rrsets, NULL);
+	struct knot_node_save_rrset_arg args;
+	args.array = rrsets;
+	args.count = 0;
+
+	gen_tree_apply_inorder(node->rrset_tree, save_rrset_to_array,
+	                       &args);
+
+	assert(args.count == node->rrset_count);
+	assert(args.count);
+
+	return (const knot_rrset_t **)rrsets;
+
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_parent(const knot_node_t *node, 
+                                        int check_version)
+{
+//	assert(!check_version
+//	       || (node->zone != NULL && node->zone->contents != NULL));
+	
+	knot_node_t *parent = node->parent;
+	
+	if (check_version && node->zone != NULL) {
+		int new_gen = knot_node_zone_gen_is_new(node);
+//		short ver = knot_node_zone_generation(node);
+	
+		/*! \todo Remove, this will not be true during the reference
+		 *        fixing.
+		 */
+//		assert(new_gen || parent == NULL
+//		       || !knot_node_is_new(parent));
+
+		if (new_gen && parent != NULL) {
+			// we want the new node
+			assert(node->parent->new_node != NULL);
+			parent = parent->new_node;
+		}
+	}
+	
+	return parent;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_parent(knot_node_t *node, knot_node_t *parent)
+{
+	// decrease number of children of previous parent
+	if (node->parent != NULL) {
+		--parent->children;
+	}
+	// set the parent
+	node->parent = parent;
+	
+	// increase the count of children of the new parent
+	if (parent != NULL) {
+		++parent->children;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+unsigned int knot_node_children(const knot_node_t *node)
+{
+	return node->children;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_previous(const knot_node_t *node, 
+                                          int check_version)
+{
+	return knot_node_get_previous(node, check_version);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_node_get_previous(const knot_node_t *node, 
+                                        int check_version)
+{
+	assert(!check_version
+	       || (node->zone != NULL && node->zone->contents != NULL));
+	
+	knot_node_t *prev = node->prev;
+	
+	if (check_version && prev != NULL) {
+		int new_gen = knot_node_zone_gen_is_new(node);
+		int old_gen = knot_node_zone_gen_is_old(node);
+//		short ver = knot_node_zone_generation(node);
+		
+		if (old_gen) {  // we want old node
+			while (knot_node_is_new(prev)) {
+				prev = prev->prev;
+			}
+			assert(!knot_node_is_new(prev));
+		} else if (new_gen) {  // we want new node
+			while (knot_node_is_old(prev)) {
+				if (prev->new_node) {
+					prev = prev->new_node;
+				} else {
+					prev = prev;
+				}
+			}
+			assert(knot_node_is_new(prev));
+		}
+	}
+	
+	return prev;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_previous(knot_node_t *node, knot_node_t *prev)
+{
+	node->prev = prev;
+	if (prev != NULL) {
+		// set the prev pointer of the next node to the given node
+		if (prev->next != NULL) {
+			assert(prev->next->prev == prev);
+			prev->next->prev = node;
+		}
+		node->next = prev->next;
+		prev->next = node;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_nsec3_node(const knot_node_t *node, 
+                                            int check_version)
+{
+	knot_node_t *nsec3_node = node->nsec3_node;
+	if (nsec3_node == NULL) {
+		return NULL;
+	}
+	
+	if (check_version) {
+		int new_gen = knot_node_zone_gen_is_new(node);
+		int old_gen = knot_node_zone_gen_is_old(node);
+//		short ver = knot_node_zone_generation(node);
+		assert(new_gen || !knot_node_is_new(nsec3_node));
+		if (old_gen && knot_node_is_new(nsec3_node)) {
+			return NULL;
+		} else if (new_gen && knot_node_is_old(nsec3_node)) {
+			nsec3_node = nsec3_node->new_node;
+		}
+	}
+	
+	return nsec3_node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_nsec3_node(knot_node_t *node, knot_node_t *nsec3_node)
+{
+	node->nsec3_node = nsec3_node;
+	if (nsec3_node != NULL) {
+		nsec3_node->nsec3_referer = node;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_node_owner(const knot_node_t *node)
+{
+	return node->owner;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_dname_t *knot_node_get_owner(const knot_node_t *node)
+{
+	return node->owner;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_owner(knot_node_t *node, knot_dname_t* owner)
+{
+	if (node) {
+		/* Retain new owner and release old owner. */
+		knot_dname_retain(owner);
+		knot_dname_release(node->owner);
+		node->owner = owner;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_wildcard_child(const knot_node_t *node, 
+                                                int check_version)
+{
+	knot_node_t *w = node->wildcard_child;
+	
+	if (check_version && w != 0) {
+		int new_gen = knot_node_zone_gen_is_new(node);
+		int old_gen = knot_node_zone_gen_is_old(node);
+//		short ver = knot_node_zone_generation(node);
+
+		if (old_gen && knot_node_is_new(w)) {
+			return NULL;
+		} else if (new_gen && knot_node_is_old(w)) {
+			assert(w->new_node != NULL);
+			w = w->new_node;
+		}
+	}
+	
+	return w;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_wildcard_child(knot_node_t *node,
+                                    knot_node_t *wildcard_child)
+{
+	node->wildcard_child = wildcard_child;
+//	assert(wildcard_child->parent == node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_current(const knot_node_t *node)
+{
+	if (node == NULL || node->zone == NULL
+	    || knot_zone_contents(node->zone) == NULL) {
+		return node;
+	}
+
+	int new_gen = knot_node_zone_gen_is_new(node);
+	int old_gen = knot_node_zone_gen_is_old(node);
+//	short ver = knot_node_zone_generation(node);
+
+	if (old_gen && knot_node_is_new(node)) {
+		return NULL;
+	} else if (new_gen && knot_node_is_old(node)) {
+		assert(node->new_node != NULL);
+		return node->new_node;
+	}
+	return node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_node_get_current(knot_node_t *node)
+{
+	if (node == NULL || node->zone == NULL
+	    || knot_zone_contents(node->zone) == NULL) {
+		return node;
+	}
+
+	int new_gen = knot_node_zone_gen_is_new(node);
+	int old_gen = knot_node_zone_gen_is_old(node);
+//	short ver = knot_node_zone_generation(node);
+
+	if (old_gen && knot_node_is_new(node)) {
+		return NULL;
+	} else if (new_gen && knot_node_is_old(node)) {
+		assert(node->new_node != NULL);
+		return node->new_node;
+	}
+	
+	assert((old_gen && knot_node_is_old(node))
+	       || (new_gen && knot_node_is_new(node))
+	       || (!old_gen && !new_gen));
+	
+	return node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_node_new_node(const knot_node_t *node)
+{
+	return node->new_node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_node_get_new_node(const knot_node_t *node)
+{
+	return node->new_node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_new_node(knot_node_t *node,
+                              knot_node_t *new_node)
+{
+	node->new_node = new_node;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_zone(knot_node_t *node, knot_zone_t *zone)
+{
+	node->zone = zone;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_update_ref(knot_node_t **ref)
+{
+	if (*ref != NULL && knot_node_is_old(*ref)) {
+		*ref = (*ref)->new_node;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_update_refs(knot_node_t *node)
+{
+	/* CLEANUP */
+	/* OMG! */
+	// reference to previous node
+	knot_node_update_ref(&node->prev);
+//	if (node->prev && knot_node_is_old(node->prev)) {
+//		assert(node->prev->new_node != NULL);
+//		node->prev = node->prev->new_node;
+//	}
+
+	// reference to next node
+	knot_node_update_ref(&node->next);
+//	if (node->next && knot_node_is_old(node->next)) {
+//		assert(node->next->new_node != NULL);
+//		node->next = node->next->new_node;
+//	}
+
+	// reference to parent
+//	if (node->parent && knot_node_is_old(node->parent)) {
+//		assert(node->parent->new_node != NULL);
+//		// do not use the API function to set parent, so that children count
+//		// is not changed
+//		//knot_node_set_parent(node, node->parent->new_node);
+//		node->parent = node->parent->new_node;
+//	}
+	knot_node_update_ref(&node->parent);
+
+	// reference to wildcard child
+	knot_node_update_ref(&node->wildcard_child);
+//	if (node->wildcard_child && knot_node_is_old(node->wildcard_child)) {
+//		assert(node->wildcard_child->new_node != NULL);
+//		node->wildcard_child = node->wildcard_child->new_node;
+//	}
+
+	// reference to NSEC3 node
+	knot_node_update_ref(&node->nsec3_node);
+//	if (node->nsec3_node && knot_node_is_old(node->nsec3_node)) {
+//		assert(node->nsec3_node->new_node != NULL);
+//		node->nsec3_node = node->nsec3_node->new_node;
+//	}
+
+	// reference to NSEC3 referrer
+	knot_node_update_ref(&node->nsec3_referer);
+//	if (node->nsec3_referer && knot_node_is_old(node->nsec3_referer)) {
+//		assert(node->nsec3_referer->new_node != NULL);
+//		node->nsec3_referer = node->nsec3_referer->new_node;
+//	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_deleg_point(knot_node_t *node)
+{
+	knot_node_flags_set_deleg(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_is_deleg_point(const knot_node_t *node)
+{
+	return knot_node_flags_get_deleg(node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_non_auth(knot_node_t *node)
+{
+	knot_node_flags_set_nonauth(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_is_non_auth(const knot_node_t *node)
+{
+	return knot_node_flags_get_nonauth(node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_is_auth(const knot_node_t *node)
+{
+	return (node->flags == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_is_new(const knot_node_t *node)
+{
+	return knot_node_flags_get_new(node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_is_old(const knot_node_t *node)
+{
+	return knot_node_flags_get_old(node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_new(knot_node_t *node)
+{
+	knot_node_flags_set_new(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_set_old(knot_node_t *node)
+{
+	knot_node_flags_set_old(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_clear_new(knot_node_t *node)
+{
+	knot_node_flags_clear_new(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_clear_old(knot_node_t *node)
+{
+	knot_node_flags_clear_old(&node->flags);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_node_free_rrsets_from_tree(void *item, void *data)
+{
+	if (item == NULL) {
+		return;
+	}
+	
+	knot_rrset_t *rrset = (knot_rrset_t *)(item);
+	knot_rrset_deep_free(&rrset, 0, 1, *((int *)data));
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_free_rrsets(knot_node_t *node, int free_rdata_dnames)
+{
+	/* CLEANUP */
+//	knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+//	for (int i = 0; i < node->rrset_count; i++) {
+//		knot_rrset_deep_free(&(rrsets[i]), 0, 1, free_rdata_dnames);
+//	}
+	
+//	free(rrsets);
+
+	char *name = knot_dname_to_str(node->owner);
+	free(name);
+
+	gen_tree_destroy(&node->rrset_tree, knot_node_free_rrsets_from_tree, 
+	                 (void *)&free_rdata_dnames);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_node_free(knot_node_t **node, int free_owner, int fix_refs)
+{
+	if (node == NULL || *node == NULL) {
+		return;
+	}
+	
+	dbg_node("Freeing node.\n");
+	if ((*node)->rrset_tree != NULL) {
+		dbg_node("Freeing RRSets.\n");
+		gen_tree_destroy(&(*node)->rrset_tree, NULL, NULL);
+	}
+
+	/*! \todo Always release owner? */
+	//if (free_owner) {
+		dbg_node("Releasing owner.\n");
+		knot_dname_release((*node)->owner);
+	//}
+
+	// check nodes referencing this node and fix the references
+
+	if (fix_refs) {
+		// previous node
+		dbg_node("Checking previous.\n");
+		if ((*node)->prev && (*node)->prev->next == (*node)) {
+			(*node)->prev->next = (*node)->next;
+		}
+
+		dbg_node("Checking next.\n");
+		if ((*node)->next && (*node)->next->prev == (*node)) {
+			(*node)->next->prev = (*node)->prev;
+		}
+
+		// NSEC3 node
+		dbg_node("Checking NSEC3.\n");
+		if ((*node)->nsec3_node
+		    && (*node)->nsec3_node->nsec3_referer == (*node)) {
+			(*node)->nsec3_node->nsec3_referer = NULL;
+		}
+
+		dbg_node("Checking NSEC3 ref.\n");
+		if ((*node)->nsec3_referer
+		    && (*node)->nsec3_referer->nsec3_node == (*node)) {
+			(*node)->nsec3_referer->nsec3_node = NULL;
+		}
+
+		// wildcard child node
+		dbg_node("Checking parent's wildcard child.\n");
+		if ((*node)->parent
+		    && (*node)->parent->wildcard_child == (*node)) {
+			(*node)->parent->wildcard_child = NULL;
+		}
+		
+		// fix parent's children count
+		if ((*node)->parent) {
+			--(*node)->parent->children;
+		}
+	}
+
+	free(*node);
+	*node = NULL;
+
+	dbg_node("Done.\n");
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_compare(knot_node_t *node1, knot_node_t *node2)
+{
+	return knot_dname_compare(node1->owner, node2->owner);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_node_shallow_copy(const knot_node_t *from, knot_node_t **to)
+{
+	// create new node
+	*to = knot_node_new(from->owner, from->parent, from->flags);
+	if (*to == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	/* Free old rrset_tree, as it will be replaced by shallow copy. */
+	gen_tree_destroy(&(*to)->rrset_tree, 0, 0);
+
+	// copy references	
+	// do not use the API function to set parent, so that children count 
+	// is not changed
+	memcpy(*to, from, sizeof(knot_node_t));
+
+	// copy RRSets
+	// copy the skip list with the old references
+	/* CLEANUP */
+	(*to)->rrset_tree = gen_tree_shallow_copy(from->rrset_tree);
+//	assert((*to)->rrset_tree != from->rrset_tree);
+//	(*to)->rrsets = skip_copy_list(from->rrsets);
+	if ((*to)->rrset_tree == NULL) {
+		free(*to);
+		*to = NULL;
+		return KNOT_ENOMEM;
+	}
+
+	return KNOT_EOK;
+}
diff --git a/src/libknot/zone/node.h b/src/libknot/zone/node.h
new file mode 100644
index 0000000..fcb612d
--- /dev/null
+++ b/src/libknot/zone/node.h
@@ -0,0 +1,436 @@
+/*!
+ * \file node.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Structure representing one node in domain name tree and API for
+ *        manipulating it.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_NODE_H_
+#define _KNOT_NODE_H_
+
+#include "dname.h"
+#include "common/skip-list.h"
+#include "rrset.h"
+#include "common/tree.h"
+#include "common/general-tree.h"
+
+struct knot_zone;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Structure representing one node in a domain name tree, i.e. one domain
+ *        name in a zone.
+ *
+ * RRSets are ordered by type and stored in a skip-list to allow fast lookup.
+ */
+struct knot_node {
+	knot_dname_t *owner; /*!< Domain name being the owner of this node. */
+	struct knot_node *parent; /*!< Parent node in the name hierarchy. */
+
+	/*! \brief Type-ordered list of RRSets belonging to this node. */
+	general_tree_t *rrset_tree;
+
+	unsigned short rrset_count; /*!< Number of RRSets stored in the node. */
+
+	/*! \brief Wildcard node being the direct descendant of this node. */
+	struct knot_node *wildcard_child;
+
+	/*!
+	 * \brief Previous node in canonical order.
+	 *
+	 * Only authoritative nodes or delegation points are referenced by this,
+	 * as only they may contain NSEC records needed for authenticating
+	 * negative answers.
+	 */
+	struct knot_node *prev;
+
+	struct knot_node *next;
+
+	/*!
+	 * \brief NSEC3 node corresponding to this node.
+	 *
+	 * Such NSEC3 node has owner in form of the hashed domain name of this
+	 * node prepended as a single label to the zone name.
+	 */
+	struct knot_node *nsec3_node;
+
+	struct knot_node *nsec3_referer;
+
+	/*!
+	 * \brief Various flags.
+	 *
+	 * Currently only two:
+	 *   0x01 - node is a delegation point
+	 *   0x02 - node is non-authoritative (under a delegation point)
+	 *   0x80 - node is old and will be removed (during update)
+	 *   0x40 - node is new, should not be used while zone is old
+	 */
+	uint8_t flags;
+
+	struct knot_node *new_node;
+	
+	unsigned int children;
+	
+	/*!
+	 * \brief Generation of node to be used.
+	 *
+	 * If set to 0, the old node will be used. Otherwise new nodes will
+	 * be used. This applies when getting some referenced node.
+	 
+	 */
+//	short **generation;
+
+	struct knot_zone *zone;
+};
+
+typedef struct knot_node knot_node_t;
+
+/*----------------------------------------------------------------------------*/
+/*! \brief Flags used to mark nodes with some property. */
+typedef enum {
+	/*! \brief Node is a delegation point (i.e. marking a zone cut). */
+	KNOT_NODE_FLAGS_DELEG = (uint8_t)0x01,
+	/*! \brief Node is not authoritative (i.e. below a zone cut). */
+	KNOT_NODE_FLAGS_NONAUTH = (uint8_t)0x02,
+	/*! \brief Node is old and will be removed (during update). */
+	KNOT_NODE_FLAGS_OLD = (uint8_t)0x80,
+	/*! \brief Node is new and should not be used while zoen is old. */
+	KNOT_NODE_FLAGS_NEW = (uint8_t)0x40
+} knot_node_flags_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates and initializes new node structure.
+ *
+ * \todo Owner reference counter will be increased.
+ *
+ * \param owner Owner of the created node.
+ * \param parent Parent of the created node.
+ * \param flags Document me.
+ *
+ * \todo Document missing parameters.
+ *
+ * \return Newly created node or NULL if an error occured.
+ */
+knot_node_t *knot_node_new(knot_dname_t *owner, knot_node_t *parent,
+                               uint8_t flags);
+
+/*!
+ * \brief Adds an RRSet to the node.
+ *
+ * \param node Node to add the RRSet to.
+ * \param rrset RRSet to add.
+ *
+ * \retval KNOT_EOK on success.
+ * \retval KNOT_ERROR if the RRSet could not be inserted.
+ */
+int knot_node_add_rrset(knot_node_t *node, knot_rrset_t *rrset,
+                          int merge);
+
+/*!
+ * \brief Returns the RRSet of the given type from the node.
+ *
+ * \param node Node to get the RRSet from.
+ * \param type Type of the RRSet to retrieve.
+ *
+ * \return RRSet from node \a node having type \a type, or NULL if no such
+ *         RRSet exists in this node.
+ */
+const knot_rrset_t *knot_node_rrset(const knot_node_t *node,
+                                        uint16_t type);
+
+/*!
+ * \brief Returns the RRSet of the given type from the node (non-const version).
+ *
+ * \param node Node to get the RRSet from.
+ * \param type Type of the RRSet to retrieve.
+ *
+ * \return RRSet from node \a node having type \a type, or NULL if no such
+ *         RRSet exists in this node.
+ */
+knot_rrset_t *knot_node_get_rrset(knot_node_t *node, uint16_t type);
+
+knot_rrset_t *knot_node_remove_rrset(knot_node_t *node, uint16_t type);
+
+void knot_node_remove_all_rrsets(knot_node_t *node);
+
+/*!
+ * \brief Returns number of RRSets in the node.
+ *
+ * \param node Node to get the RRSet count from.
+ *
+ * \return Number of RRSets in \a node.
+ */
+short knot_node_rrset_count(const knot_node_t *node);
+
+/*!
+ * \brief Returns all RRSets from the node.
+ *
+ * \param node Node to get the RRSets from.
+ *
+ * \return Newly allocated array of RRSets or NULL if an error occured.
+ */
+knot_rrset_t **knot_node_get_rrsets(const knot_node_t *node);
+
+/*!
+ * \brief Returns all RRSets from the node.
+ *
+ * \note This function is identical to knot_node_get_rrsets(), only it returns
+ *       non-modifiable data.
+ *
+ * \param node Node to get the RRSets from.
+ *
+ * \return Newly allocated array of RRSets or NULL if an error occured.
+ */
+const knot_rrset_t **knot_node_rrsets(const knot_node_t *node);
+
+/*!
+ * \brief Returns the parent of the node.
+ *
+ * \param node Node to get the parent of.
+ *
+ * \return Parent node of the given node or NULL if no parent has been set (e.g.
+ *         node in a zone apex has no parent).
+ */
+const knot_node_t *knot_node_parent(const knot_node_t *node, 
+                                        int check_version);
+
+/*!
+ * \brief Sets the parent of the node.
+ *
+ * \param node Node to set the parent of.
+ * \param parent Parent to set to the node.
+ */
+void knot_node_set_parent(knot_node_t *node, knot_node_t *parent);
+
+unsigned int knot_node_children(const knot_node_t *node);
+
+/*!
+ * \brief Returns the previous authoritative node or delegation point in
+ *        canonical order or the first node in zone.
+ *
+ * \param node Node to get the previous node of.
+ *
+ * \return Previous authoritative node or delegation point in canonical order or
+ *         the first node in zone if \a node is the last node in zone.
+ * \retval NULL if previous node is not set.
+ */
+const knot_node_t *knot_node_previous(const knot_node_t *node, 
+                                          int check_version);
+
+/*!
+ * \brief Returns the previous authoritative node or delegation point in
+ *        canonical order or the first node in zone.
+ *
+ * \note This function is identical to knot_node_previous() except that it
+ *       returns non-const node.
+ *
+ * \param node Node to get the previous node of.
+ *
+ * \return Previous authoritative node or delegation point in canonical order or
+ *         the first node in zone if \a node is the last node in zone.
+ * \retval NULL if previous node is not set.
+ */
+knot_node_t *knot_node_get_previous(const knot_node_t *node, 
+                                        int check_version);
+
+/*!
+ * \brief Sets the previous node of the given node.
+ *
+ * \param node Node to set the previous node to.
+ * \param prev Previous node to set.
+ */
+void knot_node_set_previous(knot_node_t *node, knot_node_t *prev);
+
+/*!
+ * \brief Returns the NSEC3 node corresponding to the given node.
+ *
+ * \param node Node to get the NSEC3 node for.
+ *
+ * \return NSEC3 node corresponding to \a node (i.e. node with owner name
+ *         created by concatenating the hash of owner domain name of \a node
+ *         and the name of the zone \a node belongs to).
+ * \retval NULL if the NSEC3 node is not set.
+ */
+const knot_node_t *knot_node_nsec3_node(const knot_node_t *node, 
+                                            int check_version);
+
+/*!
+ * \brief Sets the corresponding NSEC3 node of the given node.
+ *
+ * \param node Node to set the NSEC3 node to.
+ * \param nsec3_node NSEC3 node to set.
+ */
+void knot_node_set_nsec3_node(knot_node_t *node, knot_node_t *nsec3_node);
+
+/*!
+ * \brief Returns the owner of the node.
+ *
+ * \param node Node to get the owner of.
+ *
+ * \return Owner of the given node.
+ */
+const knot_dname_t *knot_node_owner(const knot_node_t *node);
+
+/*!
+ * \todo Document me.
+ */
+knot_dname_t *knot_node_get_owner(const knot_node_t *node);
+
+/*!
+ * \brief Set node owner to specified dname.
+ *
+ * Previous owner will be replaced if exist.
+ *
+ * \param node Specified node.
+ * \param owner New owner dname.
+ */
+void knot_node_set_owner(knot_node_t *node, knot_dname_t* owner);
+
+/*!
+ * \brief Returns the wildcard child of the node.
+ *
+ * \param node Node to get the owner of.
+ *
+ * \return Wildcard child of the given node or NULL if it has none.
+ */
+const knot_node_t *knot_node_wildcard_child(const knot_node_t *node, 
+                                                int check_version);
+
+/*!
+ * \brief Sets the wildcard child of the node.
+ *
+ * \param node Node to set the wildcard child of.
+ * \param wildcard_child Wildcard child of the node.
+ */
+void knot_node_set_wildcard_child(knot_node_t *node,
+                                    knot_node_t *wildcard_child);
+
+const knot_node_t *knot_node_current(const knot_node_t *node);
+
+knot_node_t *knot_node_get_current(knot_node_t *node);
+
+const knot_node_t *knot_node_new_node(const knot_node_t *node);
+
+knot_node_t *knot_node_get_new_node(const knot_node_t *node);
+
+void knot_node_set_new_node(knot_node_t *node,
+                              knot_node_t *new_node);
+
+void knot_node_set_zone(knot_node_t *node, struct knot_zone *zone);
+
+void knot_node_update_ref(knot_node_t **ref);
+
+void knot_node_update_refs(knot_node_t *node);
+
+/*!
+ * \brief Mark the node as a delegation point.
+ *
+ * \param node Node to mark as a delegation point.
+ */
+void knot_node_set_deleg_point(knot_node_t *node);
+
+/*!
+ * \brief Checks if the node is a delegation point.
+ *
+ * \param node Node to check.
+ *
+ * \retval <> 0 if \a node is marked as delegation point.
+ * \retval 0 otherwise.
+ */
+int knot_node_is_deleg_point(const knot_node_t *node);
+
+/*!
+ * \brief Mark the node as non-authoritative.
+ *
+ * \param node Node to mark as non-authoritative.
+ */
+void knot_node_set_non_auth(knot_node_t *node);
+
+/*!
+ * \brief Checks if the node is non-authoritative.
+ *
+ * \param node Node to check.
+ *
+ * \retval <> 0 if \a node is marked as non-authoritative.
+ * \retval 0 otherwise.
+ */
+int knot_node_is_non_auth(const knot_node_t *node);
+
+int knot_node_is_auth(const knot_node_t *node);
+
+int knot_node_is_new(const knot_node_t *node);
+
+int knot_node_is_old(const knot_node_t *node);
+
+void knot_node_set_new(knot_node_t *node);
+
+void knot_node_set_old(knot_node_t *node);
+
+void knot_node_clear_new(knot_node_t *node);
+
+void knot_node_clear_old(knot_node_t *node);
+
+/*!
+ * \brief Destroys the RRSets within the node structure.
+ *
+ * \param node Node to be destroyed.
+ * \param free_rdata_dnames Set to <> 0 if you want to delete ALL domain names
+ *                          present in RDATA. Set to 0 otherwise. (See
+ *                          knot_rdata_deep_free().)
+ */
+void knot_node_free_rrsets(knot_node_t *node, int free_rdata_dnames);
+
+/*!
+ * \brief Destroys the node structure.
+ *
+ * Does not destroy the RRSets within the node.
+ * Also sets the given pointer to NULL.
+ *
+ * \param node Node to be destroyed.
+ * \param free_owner Set to 0 if you do not want the owner domain name to be
+ *                   destroyed also. Set to <> 0 otherwise.
+ * \param fix_refs
+ *
+ * \todo Document missing parameters.
+ */
+void knot_node_free(knot_node_t **node, int free_owner, int fix_refs);
+
+/*!
+ * \brief Compares two nodes according to their owner.
+ *
+ * \param node1 First node.
+ * \param node2 Second node.
+ *
+ * \retval < 0 if \a node1 goes before \a node2 according to canonical order
+ *         of their owner names.
+ * \retval 0 if they are equal.
+ * \retval > 0 if \a node1 goes after \a node2.
+ */
+int knot_node_compare(knot_node_t *node1, knot_node_t *node2);
+
+int knot_node_shallow_copy(const knot_node_t *from, knot_node_t **to);
+
+#endif /* _KNOT_NODE_H_ */
+
+/*! @} */
diff --git a/src/libknot/zone/zone-contents.c b/src/libknot/zone/zone-contents.c
new file mode 100644
index 0000000..d550728
--- /dev/null
+++ b/src/libknot/zone/zone-contents.c
@@ -0,0 +1,2396 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "zone/zone-contents.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "common/base32hex.h"
+#include "consts.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+typedef struct {
+	void (*func)(knot_node_t *, void *);
+	void *data;
+} knot_zone_tree_func_t;
+
+typedef struct {
+	knot_node_t *first_node;
+	knot_zone_contents_t *zone;
+	knot_node_t *previous_node;
+	int check_ver;
+} knot_zone_adjust_arg_t;
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_zone_tree_apply(knot_zone_tree_node_t *node,
+                                   void *data)
+{
+	if (node == NULL || data == NULL) {
+		return;
+	}
+
+	knot_zone_tree_func_t *f = (knot_zone_tree_func_t *)data;
+	f->func(node->node, f->data);
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Checks if the given node can be inserted into the given zone.
+ *
+ * Checks if both the arguments are non-NULL and if the owner of the node
+ * belongs to the zone (i.e. is a subdomain of the zone apex).
+ *
+ * \param zone Zone to which the node is going to be inserted.
+ * \param node Node to check.
+ *
+ * \retval KNOT_EOK if both arguments are non-NULL and the node belongs to the
+ *         zone.
+ * \retval KNOT_EBADARG if either of the arguments is NULL.
+ * \retval KNOT_EBADZONE if the node does not belong to the zone.
+ */
+static int knot_zone_contents_check_node(
+	const knot_zone_contents_t *contents, const knot_node_t *node)
+{
+	if (contents == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// assert or just check??
+	assert(contents->apex != NULL);
+
+	if (!knot_dname_is_subdomain(node->owner,
+	                               knot_node_owner(contents->apex))) {
+dbg_zone_exec(
+		char *node_owner = knot_dname_to_str(knot_node_owner(node));
+		char *apex_owner = knot_dname_to_str(contents->apex->owner);
+		dbg_zone("zone: Trying to insert foreign node to a "
+				  "zone. Node owner: %s, zone apex: %s\n",
+				  node_owner, apex_owner);
+		free(node_owner);
+		free(apex_owner);
+);
+		return KNOT_EBADZONE;
+	}
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Destroys all RRSets in a node.
+ *
+ * This function is designed to be used in the tree-iterating functions.
+ *
+ * \param node Node to destroy RRSets from.
+ * \param data Unused parameter.
+ */
+static void knot_zone_contents_destroy_node_rrsets_from_tree(
+	knot_zone_tree_node_t *tnode, void *data)
+{
+	assert(tnode != NULL);
+	assert(tnode->node != NULL);
+
+	int free_rdata_dnames = (int)((intptr_t)data);
+	knot_node_free_rrsets(tnode->node, free_rdata_dnames);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Destroys node owner.
+ *
+ * This function is designed to be used in the tree-iterating functions.
+ *
+ * \param node Node to destroy the owner of.
+ * \param data Unused parameter.
+ */
+static void knot_zone_contents_destroy_node_owner_from_tree(
+	knot_zone_tree_node_t *tnode, void *data)
+{
+	assert(tnode != NULL);
+	assert(tnode->node != NULL);
+
+	UNUSED(data);
+	/*!< \todo change completely! */
+	knot_node_free(&tnode->node, 0, 0);
+}
+
+/*!
+ * \brief Finds and sets wildcard child for given node's owner.
+ *
+ * \param zone Current zone.
+ * \param node Node to be used.
+ */
+static void find_and_set_wildcard_child(knot_zone_contents_t *zone,
+				 knot_node_t *node)
+{
+	knot_dname_t *chopped = knot_dname_left_chop(node->owner);
+	assert(chopped);
+	knot_node_t *wildcard_parent;
+	wildcard_parent =
+		knot_zone_contents_get_node(zone, chopped);
+
+	knot_dname_free(&chopped);
+
+	assert(wildcard_parent); /* it *has* to be there */
+
+	knot_node_set_wildcard_child(wildcard_parent, node);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts one RDATA item by replacing domain name by one present in the
+ *        zone.
+ *
+ * This function tries to find the domain name in the zone. If the name is not
+ * in the zone, it does nothing. If it is there, it destroys the domain name
+ * stored in the RDATA item and replaces it by pointer to the domain name from
+ * the zone.
+ *
+ * \warning Call this function only with RDATA items which store domain names,
+ *          otherwise the behaviour is undefined.
+ *
+ * \param rdata RDATA where the item is located.
+ * \param zone Zone to which the RDATA belongs.
+ * \param pos Position of the RDATA item in the RDATA.
+ */
+static void knot_zone_contents_adjust_rdata_item(knot_rdata_t *rdata,
+                                          knot_zone_contents_t *zone,
+                                          knot_node_t *node,
+                                          int pos)
+{
+	return;
+	const knot_rdata_item_t *dname_item
+			= knot_rdata_item(rdata, pos);
+
+	assert(dname_item);
+
+	if (dname_item != NULL) {
+		knot_dname_t *dname = dname_item->dname;
+		const knot_node_t *n = NULL;
+		const knot_node_t *closest_encloser = NULL;
+		const knot_node_t *prev = NULL;
+
+		if (knot_dname_is_wildcard(dname)) {
+			find_and_set_wildcard_child(zone, node);
+		}
+
+		int ret = knot_zone_contents_find_dname(zone, dname, &n,
+		                                      &closest_encloser, &prev);
+
+		//		n = knot_zone_find_node(zone, dname);
+
+		if (ret == KNOT_EBADARG || ret == KNOT_EBADZONE) {
+			// TODO: do some cleanup if needed
+			return;
+		}
+
+		assert(ret != KNOT_ZONE_NAME_FOUND
+		       || n == closest_encloser);
+
+		if (ret != KNOT_ZONE_NAME_FOUND
+		                && (closest_encloser != NULL)) {
+			dbg_zone("Saving closest encloser to RDATA.\n");
+			// save pointer to the closest encloser
+			knot_rdata_item_t *item =
+					knot_rdata_get_item(rdata, pos);
+			assert(item->dname != NULL);
+			assert(item->dname->node == NULL);
+			//skip_insert(list, (void *)item->dname,
+			//	    (void *)closest_encloser->owner, NULL);
+			item->dname->node = closest_encloser->owner->node;
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts all RDATA in the given RRSet by replacing domain names by ones
+ *        present in the zone.
+ *
+ * This function selects the RDATA items containing a domain name (according to
+ * RR type descriptor of the RRSet's type and adjusts the item using
+ * knot_zone_adjust_rdata_item().
+ *
+ * \param rrset RRSet to adjust RDATA in.
+ * \param zone Zone to which the RRSet belongs.
+ */
+static void knot_zone_contents_adjust_rdata_in_rrset(knot_rrset_t *rrset,
+                                                   knot_zone_contents_t *zone,
+                                                   knot_node_t *node)
+{
+	uint16_t type = knot_rrset_type(rrset);
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	assert(desc);
+
+	knot_rdata_t *rdata_first = knot_rrset_get_rdata(rrset);
+	knot_rdata_t *rdata = rdata_first;
+
+	if (rdata == NULL) {
+		return;
+	}
+
+	while (rdata->next != rdata_first) {
+		for (int i = 0; i < rdata->count; ++i) {
+			if (desc->wireformat[i]
+			    == KNOT_RDATA_WF_COMPRESSED_DNAME
+			    || desc->wireformat[i]
+			       == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+			    || desc->wireformat[i]
+			       == KNOT_RDATA_WF_LITERAL_DNAME) {
+				dbg_zone("Adjusting domain name at "
+				  "position %d of RDATA of record with owner "
+				  "%s and type %s.\n",
+				  i, rrset->owner->name,
+				  knot_rrtype_to_string(type));
+
+				knot_zone_contents_adjust_rdata_item(rdata,
+				                                       zone,
+				                                       node,
+				                                       i);
+			}
+		}
+		rdata = rdata->next;
+	}
+
+	for (int i = 0; i < rdata->count; ++i) {
+		if (desc->wireformat[i]
+		    == KNOT_RDATA_WF_COMPRESSED_DNAME
+		    || desc->wireformat[i]
+		       == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+		    || desc->wireformat[i]
+		       == KNOT_RDATA_WF_LITERAL_DNAME) {
+			dbg_zone("Adjusting domain name at "
+			  "position %d of RDATA of record with owner "
+			  "%s and type %s.\n",
+			  i, rrset->owner->name,
+			  knot_rrtype_to_string(type));
+
+			knot_zone_contents_adjust_rdata_item(rdata, zone,
+			                                       node, i);
+		}
+	}
+
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts all RRSets in the given node by replacing domain names in
+ *        RDATA by ones present in the zone.
+ *
+ * This function just calls knot_zone_adjust_rdata_in_rrset() for all RRSets
+ * in the node (including all RRSIG RRSets).
+ *
+ * \param node Zone node to adjust the RRSets in.
+ * \param zone Zone to which the node belongs.
+ */
+static void knot_zone_contents_adjust_rrsets(knot_node_t *node,
+                                               knot_zone_contents_t *zone)
+{
+	//return;
+	knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+	short count = knot_node_rrset_count(node);
+
+	assert(count == 0 || rrsets != NULL);
+
+	for (int r = 0; r < count; ++r) {
+		assert(rrsets[r] != NULL);
+		dbg_zone("Adjusting next RRSet.\n");
+		knot_zone_contents_adjust_rdata_in_rrset(rrsets[r], zone,
+		                                           node);
+		knot_rrset_t *rrsigs = rrsets[r]->rrsigs;
+		if (rrsigs != NULL) {
+			dbg_zone("Adjusting next RRSIGs.\n");
+			knot_zone_contents_adjust_rdata_in_rrset(rrsigs,
+			                                           zone,
+			                                           node);
+		}
+	}
+
+	free(rrsets);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts zone node for faster query processing.
+ *
+ * - Adjusts RRSets in the node (see knot_zone_adjust_rrsets()).
+ * - Marks the node as delegation point or non-authoritative (below a zone cut)
+ *   if applicable.
+ * - Stores reference to corresponding NSEC3 node if applicable.
+ *
+ * \param node Zone node to adjust.
+ * \param zone Zone the node belongs to.
+ */
+static void knot_zone_contents_adjust_node(knot_node_t *node,
+                                             knot_zone_contents_t *zone,
+					     int check_ver)
+{
+
+dbg_zone_exec(
+	char *name = knot_dname_to_str(node->owner);
+	dbg_zone("----- Adjusting node %s -----\n", name);
+	free(name);
+);
+
+	// adjust domain names in RDATA
+	knot_zone_contents_adjust_rrsets(node, zone);
+
+dbg_zone_exec(
+	if (knot_node_parent(node, 1)) {
+		char *name = knot_dname_to_str(knot_node_owner(
+				knot_node_parent(node, check_ver)));
+		dbg_zone("Parent: %s\n", name);
+		dbg_zone("Parent is delegation point: %s\n",
+		       knot_node_is_deleg_point(knot_node_parent(node, check_ver))
+		       ? "yes" : "no");
+		dbg_zone("Parent is non-authoritative: %s\n",
+		       knot_node_is_non_auth(knot_node_parent(node, check_ver))
+		       ? "yes" : "no");
+		free(name);
+	} else {
+		dbg_zone("No parent!\n");
+	}
+);
+	// delegation point / non-authoritative node
+	if (knot_node_parent(node, check_ver)
+	    && (knot_node_is_deleg_point(knot_node_parent(node, check_ver))
+		|| knot_node_is_non_auth(knot_node_parent(node, check_ver)))) {
+		knot_node_set_non_auth(node);
+	} else if (knot_node_rrset(node, KNOT_RRTYPE_NS) != NULL
+		   && node != zone->apex) {
+		knot_node_set_deleg_point(node);
+	}
+
+	// authorative node?
+//	if (!knot_node_is_non_auth(node)) {
+		zone->node_count++;
+//	}
+
+	// assure that owner has proper node
+	if (knot_dname_node(knot_node_owner(node), 0) == NULL) {
+		knot_dname_set_node(knot_node_get_owner(node), node);
+		knot_dname_set_node(knot_node_get_owner(node), node);
+	}
+
+	// NSEC3 node (only if NSEC3 tree is not empty)
+	const knot_node_t *prev;
+	const knot_node_t *nsec3;
+	int match = knot_zone_contents_find_nsec3_for_name(zone,
+					knot_node_owner(node),
+					&nsec3, &prev, check_ver);
+	if (match != KNOT_ZONE_NAME_FOUND) {
+		nsec3 = NULL;
+	}
+
+	knot_node_set_nsec3_node(node, (knot_node_t *)nsec3);
+
+	dbg_zone("Set flags to the node: \n");
+	dbg_zone("Delegation point: %s\n",
+	       knot_node_is_deleg_point(node) ? "yes" : "no");
+	dbg_zone("Non-authoritative: %s\n",
+	       knot_node_is_non_auth(node) ? "yes" : "no");
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts zone node for faster query processing.
+ *
+ * This function is just a wrapper over knot_zone_adjust_node() to be used
+ * in tree-traversing functions.
+ *
+ * \param node Zone node to adjust.
+ * \param data Zone the node belongs to.
+ */
+static void knot_zone_contents_adjust_node_in_tree(
+		knot_zone_tree_node_t *tnode, void *data)
+{
+	assert(data != NULL);
+	assert(tnode != NULL);
+	assert(tnode->node != NULL);
+
+	knot_zone_adjust_arg_t *args = (knot_zone_adjust_arg_t *)data;
+	knot_node_t *node = tnode->node;
+	knot_node_set_previous(node, args->previous_node);
+	args->previous_node = node;
+	if (args->first_node == NULL) {
+		args->first_node = node;
+	}
+	knot_zone_contents_t *zone = args->zone;
+
+	knot_zone_contents_adjust_node(node, zone, args->check_ver);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Adjusts NSEC3 node for faster query processing.
+ *
+ * This function is just a wrapper over knot_zone_adjust_nsec3_node() to be
+ * used in tree-traversing functions.
+ *
+ * \param node Zone node to adjust.
+ * \param data Zone the node belongs to.
+ */
+static void knot_zone_contents_adjust_nsec3_node_in_tree(
+		knot_zone_tree_node_t *tnode, void *data)
+{
+	assert(data != NULL);
+	assert(tnode != NULL);
+	assert(tnode->node != NULL);
+
+	knot_zone_adjust_arg_t *args = (knot_zone_adjust_arg_t *)data;
+	knot_node_t *node = tnode->node;
+	knot_node_set_previous(node, args->previous_node);
+	args->previous_node = node;
+	if (args->first_node == NULL) {
+		args->first_node = node;
+	}
+
+	/* Not needed anymore. */
+//	knot_zone_contents_t *zone = args->zone;
+//	knot_zone_contents_adjust_nsec3_node(node, zone, 1);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Creates a NSEC3 hashed name for the given domain name.
+ *
+ * \note The zone's NSEC3PARAM record must be parsed prior to calling this
+ *       function (see knot_zone_load_nsec3param()).
+ *
+ * \param zone Zone from which to take the NSEC3 parameters.
+ * \param name Domain name to hash.
+ * \param nsec3_name Hashed name.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENSEC3PAR
+ * \retval KNOT_ECRYPTO
+ * \retval KNOT_ERROR if an error occured while creating a new domain name
+ *                      from the hash or concatenating it with the zone name.
+ */
+static int knot_zone_contents_nsec3_name(const knot_zone_contents_t *zone,
+                                           const knot_dname_t *name,
+                                           knot_dname_t **nsec3_name)
+{
+	assert(nsec3_name != NULL);
+
+	*nsec3_name = NULL;
+
+	const knot_nsec3_params_t *nsec3_params =
+		knot_zone_contents_nsec3params(zone);
+
+	if (nsec3_params == NULL) {
+dbg_zone_exec(
+		char *n = knot_dname_to_str(zone->apex->owner);
+		dbg_zone("No NSEC3PARAM for zone %s.\n", n);
+		free(n);
+);
+		return KNOT_ENSEC3PAR;
+	}
+
+	uint8_t *hashed_name = NULL;
+	size_t hash_size = 0;
+
+dbg_zone_exec(
+	char *n = knot_dname_to_str(name);
+	dbg_zone("Hashing name %s.\n", n);
+	free(n);
+);
+
+	int res = knot_nsec3_sha1(nsec3_params, knot_dname_name(name),
+	                            knot_dname_size(name), &hashed_name,
+	                            &hash_size);
+
+	if (res != 0) {
+		char *n = knot_dname_to_str(name);
+		dbg_zone("Error while hashing name %s.\n", n);
+		free(n);
+		return KNOT_ECRYPTO;
+	}
+
+	dbg_zone("Hash: ");
+	dbg_zone_hex((char *)hashed_name, hash_size);
+	dbg_zone("\n");
+
+	char *name_b32 = NULL;
+	size_t size = base32hex_encode_alloc((char *)hashed_name, hash_size,
+	                                     &name_b32);
+
+	if (size == 0) {
+		char *n = knot_dname_to_str(name);
+		dbg_zone("Error while encoding hashed name %s to "
+		                  "base32.\n", n);
+		free(n);
+		if (name_b32 != NULL) {
+			free(name_b32);
+		}
+		return KNOT_ECRYPTO;
+	}
+
+	assert(name_b32 != NULL);
+	free(hashed_name);
+
+	dbg_zone("Base32-encoded hash: %s\n", name_b32);
+
+	/* Will be returned to caller, make sure it is released after use. */
+	*nsec3_name = knot_dname_new_from_str(name_b32, size, NULL);
+
+	free(name_b32);
+
+	if (*nsec3_name == NULL) {
+		dbg_zone("Error while creating domain name for hashed"
+		                  " name.\n");
+		return KNOT_ERROR;
+	}
+
+	assert(zone->apex->owner != NULL);
+	knot_dname_t *ret = knot_dname_cat(*nsec3_name, zone->apex->owner);
+
+	if (ret == NULL) {
+		dbg_zone("Error while creating NSEC3 domain name for "
+		                  "hashed name.\n");
+		knot_dname_release(*nsec3_name);
+		return KNOT_ERROR;
+	}
+
+	assert(ret == *nsec3_name);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tries to find the given domain name in the zone tree.
+ *
+ * \param zone Zone to search in.
+ * \param name Domain name to find.
+ * \param node Found node.
+ * \param previous Previous node in canonical order (i.e. the one directly
+ *                 preceding \a name in canonical order, regardless if the name
+ *                 is in the zone or not).
+ *
+ * \retval <> 0 if the domain name was found. In such case \a node holds the
+ *              zone node with \a name as its owner. \a previous is set
+ *              properly.
+ * \retval 0 if the domain name was not found. \a node may hold any (or none)
+ *           node. \a previous is set properly.
+ */
+static int knot_zone_contents_find_in_tree(knot_zone_tree_t *tree,
+                                             const knot_dname_t *name,
+                                             knot_node_t **node,
+                                             knot_node_t **previous)
+{
+	assert(tree != NULL);
+	assert(name != NULL);
+	assert(node != NULL);
+	assert(previous != NULL);
+
+	knot_node_t *found = NULL, *prev = NULL;
+//	knot_node_t *found2 = NULL, *prev2 = NULL;
+
+	int exact_match = knot_zone_tree_get_less_or_equal(
+	                         tree, name, &found, &prev, 1);
+
+//	assert(prev != NULL);
+	assert(exact_match >= 0);
+	*node = found;
+	*previous = prev;
+
+//	if (prev == NULL) {
+//		// either the returned node is the root of the tree, or it is
+//		// the leftmost node in the tree; in both cases node was found
+//		// set the previous node of the found node
+//		assert(exact_match);
+//		assert(found != NULL);
+//		*previous = knot_node_get_previous(found, 1);
+//	} else {
+//		// otherwise check if the previous node is not an empty
+//		// non-terminal
+//		*previous = (knot_node_rrset_count(prev) == 0)
+//		            ? knot_node_get_previous(prev, 1)
+//		            : prev;
+//	}
+
+	return exact_match;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_zone_contents_node_to_hash(knot_zone_tree_node_t *tnode,
+                                              void *data)
+{
+	assert(tnode != NULL && tnode->node != NULL
+	       && tnode->node->owner != NULL && data != NULL);
+
+	knot_node_t *node = tnode->node;
+
+	knot_zone_contents_t *zone = (knot_zone_contents_t *)data;
+	/*
+	 * By the original approach, only authoritative nodes and delegation
+	 * points should be added to the hash table, but currently, all nodes
+	 * are being added when the zone is created (don't know why actually:),
+	 * so we will do no distinction here neither.
+	 */
+
+#ifdef USE_HASH_TABLE
+//dbg_zone_exec(
+//	char *name = knot_dname_to_str(node->owner);
+//	dbg_zone("Adding node with owner %s to hash table.\n", name);
+//	free(name);
+//);
+	//assert(zone->table != NULL);
+	// add the node also to the hash table if authoritative, or deleg. point
+	if (zone->table != NULL
+	    && ck_insert_item(zone->table,
+	                      (const char *)node->owner->name,
+	                      node->owner->size, (void *)node) != 0) {
+		dbg_zone("Error inserting node into hash table!\n");
+	}
+#endif
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_zone_contents_dnames_from_rdata_to_table(
+	knot_dname_table_t *table, knot_rdata_t *rdata,
+	knot_rrtype_descriptor_t *d)
+{
+	unsigned int count = knot_rdata_item_count(rdata);
+	int rc = 0;
+	assert(count <= d->length);
+	// for each RDATA item
+	for (unsigned int j = 0; j < count; ++j) {
+		if (d->wireformat[j]
+		    == KNOT_RDATA_WF_COMPRESSED_DNAME
+		    || d->wireformat[j]
+		       == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+		    || d->wireformat[j]
+		       == KNOT_RDATA_WF_LITERAL_DNAME) {
+			dbg_zone("Saving dname from "
+					  "rdata to dname table"
+					  ".\n");
+			rc = knot_dname_table_add_dname_check(table,
+			&knot_rdata_get_item(rdata, j)->dname);
+			if (rc < 0) {
+				dbg_zone("Error: %s\n",
+				  knot_strerror(rc));
+				return rc;
+			}
+		}
+	}
+
+	dbg_zone("RDATA OK.\n");
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_zone_contents_dnames_from_rrset_to_table(
+	knot_dname_table_t *table, knot_rrset_t *rrset, int replace_owner,
+	knot_dname_t *owner)
+{
+	assert(table != NULL && rrset != NULL && owner != NULL);
+
+	if (replace_owner) {
+		// discard the old owner and replace it with the new
+		knot_rrset_set_owner(rrset, owner);
+	}
+	dbg_zone("RRSet owner: %p\n", rrset->owner);
+
+	knot_rrtype_descriptor_t *desc = knot_rrtype_descriptor_by_type(
+		knot_rrset_type(rrset));
+	if (desc == NULL) {
+		// not recognized RR type, ignore
+		dbg_zone("RRSet type not recognized.\n");
+		return KNOT_EOK;
+	}
+	// for each RDATA in RRSet
+	knot_rdata_t *rdata = knot_rrset_get_rdata(rrset);
+	while (rdata != NULL) {
+		int rc = knot_zone_contents_dnames_from_rdata_to_table(table,
+		                                                   rdata, desc);
+		if (rc != KNOT_EOK) {
+			return rc;
+		}
+
+		rdata = knot_rrset_rdata_get_next(rrset, rdata);
+	}
+
+	dbg_zone("RRSet OK.\n");
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_zone_contents_dnames_from_node_to_table(
+	knot_dname_table_t *table, knot_node_t *node)
+{
+	/*
+	 * Assuming that all the RRSets have the same owner as the node.
+	 */
+
+	// insert owner
+	char *name = knot_dname_to_str(node->owner);
+	dbg_zone("Node owner before inserting to dname table: %p.\n",
+	                  node->owner);
+	dbg_zone("Node owner before inserting to dname table: %s.\n",
+	                  name);
+	free(name);
+	//knot_dname_t *old_owner = node->owner;
+	int rc = knot_dname_table_add_dname_check(table, &node->owner);
+	if (rc < 0) {
+		dbg_zone("Failed to add dname to dname table.\n");
+		return rc;
+	}
+	int replace_owner = (rc > 0);
+	dbg_zone("Node owner after inserting to dname table: %p.\n",
+	                  node->owner);
+	name = knot_dname_to_str(node->owner);
+	dbg_zone("Node owner after inserting to dname table: %s.\n",
+	                  name);
+	free(name);
+
+	knot_rrset_t **rrsets = knot_node_get_rrsets(node);
+	// for each RRSet
+	for (int i = 0; i < knot_node_rrset_count(node); ++i) {
+		dbg_zone("Inserting RRSets from node to table.\n");
+		rc = knot_zone_contents_dnames_from_rrset_to_table(table,
+			rrsets[i], replace_owner, node->owner);
+		if (rc != KNOT_EOK) {
+			return rc;
+		}
+	}
+
+	free(rrsets);
+
+	dbg_zone("Node OK\n");
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_zone_contents_t *knot_zone_contents_new(knot_node_t *apex,
+                                                 uint node_count,
+                                                 int use_domain_table,
+                                                 struct knot_zone *zone)
+{
+	knot_zone_contents_t *contents = (knot_zone_contents_t *)
+	                              calloc(1, sizeof(knot_zone_contents_t));
+	if (contents == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+
+//	printf("created cont: %p (%s)\n",
+//	       contents, knot_dname_to_str(apex->owner));
+
+	contents->apex = apex;
+	contents->zone = zone;
+	knot_node_set_zone(apex, zone);
+
+	dbg_zone("Creating tree for normal nodes.\n");
+	contents->nodes = malloc(sizeof(knot_zone_tree_t));
+	if (contents->nodes == NULL) {
+		ERR_ALLOC_FAILED;
+		goto cleanup;
+	}
+
+	dbg_zone("Creating tree for NSEC3 nodes.\n");
+	contents->nsec3_nodes = malloc(sizeof(knot_zone_tree_t));
+	if (contents->nsec3_nodes == NULL) {
+		ERR_ALLOC_FAILED;
+		goto cleanup;
+	}
+
+	if (use_domain_table) {
+		dbg_zone("Creating domain name table.\n");
+		contents->dname_table = knot_dname_table_new();
+		if (contents->dname_table == NULL) {
+			ERR_ALLOC_FAILED;
+			goto cleanup;
+		}
+	} else {
+		contents->dname_table = NULL;
+	}
+
+	contents->node_count = node_count;
+
+	/* Initialize NSEC3 params */
+	dbg_zone("Initializing NSEC3 parameters.\n");
+	contents->nsec3_params.algorithm = 0;
+	contents->nsec3_params.flags = 0;
+	contents->nsec3_params.iterations = 0;
+	contents->nsec3_params.salt_length = 0;
+	contents->nsec3_params.salt = NULL;
+
+	dbg_zone("Initializing zone trees.\n");
+	if (knot_zone_tree_init(contents->nodes) != KNOT_EOK
+	    || knot_zone_tree_init(contents->nsec3_nodes) != KNOT_EOK) {
+		goto cleanup;
+	}
+
+	dbg_zone("Inserting apex into the zone tree.\n");
+	if (knot_zone_tree_insert(contents->nodes, apex) != KNOT_EOK) {
+		dbg_zone("Failed to insert apex to the zone tree.\n");
+		goto cleanup;
+	}
+
+#ifdef USE_HASH_TABLE
+	if (contents->node_count > 0) {
+		dbg_zone("Creating hash table.\n");
+		contents->table = ck_create_table(contents->node_count);
+		if (contents->table == NULL) {
+			goto cleanup;
+		}
+
+		// insert the apex into the hash table
+		dbg_zone("Inserting apex into the hash table.\n");
+		if (ck_insert_item(contents->table,
+		                   (const char *)knot_dname_name(
+		                                       knot_node_owner(apex)),
+		                   knot_dname_size(knot_node_owner(apex)),
+		                   (void *)apex) != 0) {
+			ck_destroy_table(&contents->table, NULL, 0);
+			goto cleanup;
+		}
+	} else {
+		contents->table = NULL;
+	}
+#endif
+
+	// insert names from the apex to the domain table
+	if (use_domain_table) {
+		dbg_zone("Inserting names from apex to table.\n");
+		int rc = knot_zone_contents_dnames_from_node_to_table(
+		             contents->dname_table, apex);
+		if (rc != KNOT_EOK) {
+			ck_destroy_table(&contents->table, NULL, 0);
+			goto cleanup;
+		}
+	}
+
+	return contents;
+
+cleanup:
+	dbg_zone("Cleaning up.\n");
+	free(contents->dname_table);
+	free(contents->nodes);
+	free(contents->nsec3_nodes);
+	free(contents);
+	return NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+//short knot_zone_contents_generation(const knot_zone_contents_t *zone)
+//{
+//	return zone->generation;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_gen_is_old(const knot_zone_contents_t *contents)
+{
+	return (contents->generation == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_gen_is_new(const knot_zone_contents_t *contents)
+{
+	return (contents->generation == 1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_gen_is_finished(const knot_zone_contents_t *contents)
+{
+	return (contents->generation == -1);
+}
+
+/*----------------------------------------------------------------------------*/
+
+//void knot_zone_contents_switch_generation(knot_zone_contents_t *zone)
+//{
+//	zone->generation = 1 - zone->generation;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_contents_set_gen_old(knot_zone_contents_t *contents)
+{
+	contents->generation = 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_contents_set_gen_new(knot_zone_contents_t *contents)
+{
+	contents->generation = 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_contents_set_gen_new_finished(knot_zone_contents_t *contents)
+{
+	contents->generation = -1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+uint16_t knot_zone_contents_class(const knot_zone_contents_t *contents)
+{
+	if (contents == NULL || contents->apex == NULL
+	    || knot_node_rrset(contents->apex, KNOT_RRTYPE_SOA) == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return knot_rrset_class(knot_node_rrset(contents->apex,
+	                                        KNOT_RRTYPE_SOA));
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_add_node(knot_zone_contents_t *zone,
+                                  knot_node_t *node, int create_parents,
+                                  uint8_t flags, int use_domain_table)
+{
+	if (zone == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int ret = 0;
+	if ((ret = knot_zone_contents_check_node(zone, node)) != 0) {
+		return ret;
+	}
+
+	ret = knot_zone_tree_insert(zone->nodes, node);
+	if (ret != KNOT_EOK) {
+		dbg_zone("Failed to insert node into zone tree.\n");
+		return ret;
+	}
+
+#ifdef USE_HASH_TABLE
+	char *name = knot_dname_to_str(node->owner);
+//	dbg_zone("Adding node with owner %s to hash table.\n", name);
+	free(name);
+	//assert(zone->table != NULL);
+	// add the node also to the hash table if authoritative, or deleg. point
+	if (zone->table != NULL
+	    && ck_insert_item(zone->table,
+	                      (const char *)node->owner->name,
+	                      node->owner->size, (void *)node) != 0) {
+		dbg_zone("Error inserting node into hash table!\n");
+		/*! \todo Remove the node from the tree. */
+		return KNOT_EHASH;
+	}
+#endif
+	assert(knot_zone_contents_find_node(zone, node->owner));
+
+	if (use_domain_table) {
+		ret = knot_zone_contents_dnames_from_node_to_table(
+		          zone->dname_table, node);
+		if (ret != KNOT_EOK) {
+			/*! \todo Remove node from the tree and hash table.*/
+			dbg_zone("Failed to add dnames into table.\n");
+			return ret;
+		}
+	}
+
+	knot_node_set_zone(node, zone->zone);
+
+	if (!create_parents) {
+		return KNOT_EOK;
+	}
+
+	dbg_zone("Creating parents of the node.\n");
+
+	knot_dname_t *chopped =
+		knot_dname_left_chop(knot_node_owner(node));
+	if (knot_dname_compare(knot_node_owner(zone->apex), chopped) == 0) {
+		dbg_zone("Zone apex is the parent.\n");
+		knot_node_set_parent(node, zone->apex);
+	} else {
+		knot_node_t *next_node;
+		while ((next_node
+		      = knot_zone_contents_get_node(zone, chopped)) == NULL) {
+			/* Adding new dname to zone + add to table. */
+			dbg_zone("Creating new node.\n");
+			next_node = knot_node_new(chopped, NULL, flags);
+			if (next_node == NULL) {
+				/* Directly discard. */
+				knot_dname_free(&chopped);
+				return KNOT_ENOMEM;
+			}
+			if (use_domain_table) {
+				ret =
+				 knot_zone_contents_dnames_from_node_to_table(
+					zone->dname_table, next_node);
+				if (ret != KNOT_EOK) {
+					/*! \todo Will next_node leak? */
+					knot_dname_release(chopped);
+					return ret;
+				}
+			}
+
+			if (next_node->owner != chopped) {
+				/* Node owner was in RDATA */
+				chopped = next_node->owner;
+			}
+
+			assert(knot_zone_contents_find_node(zone, chopped)
+			       == NULL);
+			assert(knot_node_owner(next_node) == chopped);
+
+			dbg_zone("Inserting new node to zone tree.\n");
+//			TREE_INSERT(zone->tree, knot_node, avl, next_node);
+
+			ret = knot_zone_tree_insert(zone->nodes,
+			                              next_node);
+			if (ret != KNOT_EOK) {
+				dbg_zone("Failed to insert new node "
+				                  "to zone tree.\n");
+				/*! \todo Delete the node?? */
+				/* Directly discard. */
+				knot_dname_release(chopped);
+				return ret;
+			}
+
+#ifdef USE_HASH_TABLE
+dbg_zone_exec(
+			char *name = knot_dname_to_str(
+					knot_node_owner(next_node));
+			dbg_zone("Adding new node with owner %s to "
+			                  "hash table.\n", name);
+			free(name);
+);
+
+			if (zone->table != NULL
+			    && ck_insert_item(zone->table,
+			      (const char *)knot_dname_name(
+			                    knot_node_owner(next_node)),
+			      knot_dname_size(knot_node_owner(next_node)),
+			      (void *)next_node) != 0) {
+				dbg_zone("Error inserting node into "
+				                  "hash table!\n");
+				/*! \todo Delete the node?? */
+				/* Directly discard. */
+				knot_dname_release(chopped);
+				return KNOT_EHASH;
+			}
+
+			// set parent
+			knot_node_set_parent(node, next_node);
+
+			// set zone
+			knot_node_set_zone(next_node, zone->zone);
+
+			// check if the node is not wildcard child of the parent
+			if (knot_dname_is_wildcard(
+					knot_node_owner(node))) {
+				knot_node_set_wildcard_child(next_node, node);
+			}
+#endif
+			dbg_zone("Next parent.\n");
+			node = next_node;
+			knot_dname_t *chopped_last = chopped;
+			chopped = knot_dname_left_chop(chopped);
+
+			/* Release last chop, reference is already stored
+			 * in next_node.
+			 */
+			knot_dname_release(chopped_last);
+
+		}
+		// set the found parent (in the zone) as the parent of the last
+		// inserted node
+		assert(knot_node_parent(node, 0) == NULL);
+		knot_node_set_parent(node, next_node);
+
+		dbg_zone("Created all parents.\n");
+	}
+
+	/* Directly discard. */
+	/*! \todo This may be double-release. */
+	knot_dname_release(chopped);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_add_rrset(knot_zone_contents_t *zone,
+                                   knot_rrset_t *rrset, knot_node_t **node,
+                                   knot_rrset_dupl_handling_t dupl,
+                                   int use_domain_table)
+{
+	if (zone == NULL || rrset == NULL || zone->apex == NULL
+	    || zone->apex->owner == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// check if the RRSet belongs to the zone
+	if (knot_dname_compare(knot_rrset_owner(rrset),
+	                         zone->apex->owner) != 0
+	    && !knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	                                  zone->apex->owner)) {
+		return KNOT_EBADZONE;
+	}
+
+	if ((*node) == NULL
+	    && (*node = knot_zone_contents_get_node(zone,
+	                            knot_rrset_owner(rrset))) == NULL) {
+		return KNOT_ENONODE;
+	}
+
+	assert(*node != NULL);
+
+	// add all domain names from the RRSet to domain name table
+	int rc;
+
+	/*! \todo REMOVE RRSET */
+	rc = knot_node_add_rrset(*node, rrset,
+	                           dupl == KNOT_RRSET_DUPL_MERGE);
+	if (rc < 0) {
+		dbg_zone("Failed to add RRSet to node.\n");
+		return rc;
+	}
+
+	int ret = rc;
+
+	if (use_domain_table) {
+		dbg_zone("Saving RRSet to table.\n");
+		rc = knot_zone_contents_dnames_from_rrset_to_table(
+		         zone->dname_table, rrset, 0, (*node)->owner);
+		if (rc != KNOT_EOK) {
+			dbg_zone("Error saving domain names from "
+					  "RRSIGs to the domain name table.\n "
+					  "The zone may be in an inconsistent "
+					  "state.\n");
+			// WARNING: the zone is not in consistent state now -
+			// there may be domain names in it that are not inserted
+			// into the domain table
+			return rc;
+		}
+	}
+
+	// replace RRSet's owner with the node's owner (that is already in the
+	// table)
+	/*! \todo Do even if domain table is not used?? */
+	if (ret == KNOT_EOK && rrset->owner != (*node)->owner) {
+		knot_rrset_set_owner(rrset, (*node)->owner);
+	}
+
+	dbg_zone("RRSet OK.\n");
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_add_rrsigs(knot_zone_contents_t *zone,
+                                    knot_rrset_t *rrsigs,
+                                    knot_rrset_t **rrset,
+                                    knot_node_t **node,
+                                    knot_rrset_dupl_handling_t dupl,
+                                    int use_domain_table)
+{
+	if (zone == NULL || rrsigs == NULL || rrset == NULL || node == NULL
+	    || zone->apex == NULL || zone->apex->owner == NULL) {
+dbg_zone_exec(
+		dbg_zone("Parameters: zone=%p, rrsigs=%p, rrset=%p, "
+				"node=%p\n", zone, rrsigs, rrset, node);
+		if (zone != NULL) {
+			dbg_zone("zone->apex=%p\n", zone->apex);
+			if (zone->apex != NULL) {
+				dbg_zone("zone->apex->owner=%p\n", 
+						zone->apex->owner);
+			}
+		}
+);
+		return KNOT_EBADARG;
+	}
+
+	// check if the RRSet belongs to the zone
+	if (*rrset != NULL
+	    && knot_dname_compare(knot_rrset_owner(*rrset),
+	                            zone->apex->owner) != 0
+	    && !knot_dname_is_subdomain(knot_rrset_owner(*rrset),
+	                                  zone->apex->owner)) {
+		return KNOT_EBADZONE;
+	}
+
+	// check if the RRSIGs belong to the RRSet
+	if (*rrset != NULL
+	    && (knot_dname_compare(knot_rrset_owner(rrsigs),
+	                             knot_rrset_owner(*rrset)) != 0)) {
+		dbg_zone("RRSIGs does not belong to the given RRSet.\n");
+		return KNOT_EBADARG;
+	}
+
+	// if no RRSet given, try to find the right RRSet
+	if (*rrset == NULL) {
+		// even no node given
+		// find proper node
+		knot_node_t *(*get_node)(const knot_zone_contents_t *,
+		                           const knot_dname_t *)
+		    = (knot_rdata_rrsig_type_covered(
+		            knot_rrset_rdata(rrsigs)) == KNOT_RRTYPE_NSEC3)
+		       ? knot_zone_contents_get_nsec3_node
+		       : knot_zone_contents_get_node;
+
+		if (*node == NULL
+		    && (*node = get_node(
+		                   zone, knot_rrset_owner(rrsigs))) == NULL) {
+			dbg_zone("Failed to find node for RRSIGs.\n");
+			return KNOT_ENONODE;
+		}
+
+		assert(*node != NULL);
+
+		// find the RRSet in the node
+		// take only the first RDATA from the RRSIGs
+		dbg_zone("Finding RRSet for type %s\n",
+		                  knot_rrtype_to_string(
+		                      knot_rdata_rrsig_type_covered(
+		                      knot_rrset_rdata(rrsigs))));
+		*rrset = knot_node_get_rrset(
+		             *node, knot_rdata_rrsig_type_covered(
+		                      knot_rrset_rdata(rrsigs)));
+		if (*rrset == NULL) {
+			dbg_zone("Failed to find RRSet for RRSIGs.\n");
+			return KNOT_ENORRSET;
+		}
+	}
+
+	assert(*rrset != NULL);
+
+	// add all domain names from the RRSet to domain name table
+	int rc;
+	int ret = KNOT_EOK;
+
+	rc = knot_rrset_add_rrsigs(*rrset, rrsigs, dupl);
+	if (rc < 0) {
+		dbg_dname("Failed to add RRSIGs to RRSet.\n");
+		return rc;
+	} else if (rc > 0) {
+		assert(dupl == KNOT_RRSET_DUPL_MERGE);
+		ret = 1;
+	}
+
+	if (use_domain_table) {
+		dbg_zone("Saving RRSIG RRSet to table.\n");
+		rc = knot_zone_contents_dnames_from_rrset_to_table(
+		       zone->dname_table, rrsigs, 0, (*rrset)->owner);
+		if (rc != KNOT_EOK) {
+			dbg_zone("Error saving domain names from "
+					  "RRSIGs to the domain name table.\n "
+					  "The zone may be in an inconsistent "
+					  "state.\n");
+			// WARNING: the zone is not in consistent state now -
+			// there may be domain names in it that are not inserted
+			// into the domain table
+			return rc;
+		}
+	}
+
+	// replace RRSet's owner with the node's owner (that is already in the
+	// table)
+	if ((*rrset)->owner != (*rrset)->rrsigs->owner) {
+		knot_rrset_set_owner((*rrset)->rrsigs, (*rrset)->owner);
+	}
+
+	dbg_zone("RRSIGs OK\n");
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_add_nsec3_node(knot_zone_contents_t *zone,
+                                        knot_node_t *node, int create_parents,
+                                        uint8_t flags, int use_domain_table)
+{
+	UNUSED(create_parents);
+	UNUSED(flags);
+
+	if (zone == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	int ret = 0;
+	if ((ret = knot_zone_contents_check_node(zone, node)) != 0) {
+		return ret;
+	}
+
+	// how to know if this is successfull??
+//	TREE_INSERT(zone->nsec3_nodes, knot_node, avl, node);
+	knot_zone_tree_insert(zone->nsec3_nodes, node);
+
+	if (use_domain_table) {
+		ret = knot_zone_contents_dnames_from_node_to_table(
+		           zone->dname_table, node);
+		if (ret != KNOT_EOK) {
+			/*! \todo Remove the node from the tree. */
+			dbg_zone("Failed to add dnames into table.\n");
+			return ret;
+		}
+	}
+
+	// no parents to be created, the only parent is the zone apex
+	// set the apex as the parent of the node
+	knot_node_set_parent(node, zone->apex);
+
+	// set the zone to the node
+	knot_node_set_zone(node, zone->zone);
+
+	// cannot be wildcard child, so nothing to be done
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_add_nsec3_rrset(knot_zone_contents_t *zone,
+                                         knot_rrset_t *rrset,
+                                         knot_node_t **node,
+                                         knot_rrset_dupl_handling_t dupl,
+                                         int use_domain_table)
+{
+	if (zone == NULL || rrset == NULL || zone->apex == NULL
+	    || zone->apex->owner == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// check if the RRSet belongs to the zone
+	if (knot_dname_compare(knot_rrset_owner(rrset),
+	                         zone->apex->owner) != 0
+	    && !knot_dname_is_subdomain(knot_rrset_owner(rrset),
+	                                  zone->apex->owner)) {
+		return KNOT_EBADZONE;
+	}
+
+	if ((*node) == NULL
+	    && (*node = knot_zone_contents_get_nsec3_node(
+	                      zone, knot_rrset_owner(rrset))) == NULL) {
+		return KNOT_ENONODE;
+	}
+
+	assert(*node != NULL);
+
+	// add all domain names from the RRSet to domain name table
+	int rc;
+
+	/*! \todo REMOVE RRSET */
+	rc = knot_node_add_rrset(*node, rrset,
+	                           dupl == KNOT_RRSET_DUPL_MERGE);
+	if (rc < 0) {
+		return rc;
+	}
+
+	int ret = rc;
+
+	if (use_domain_table) {
+		dbg_zone("Saving NSEC3 RRSet to table.\n");
+		rc = knot_zone_contents_dnames_from_rrset_to_table(
+		         zone->dname_table, rrset, 0, (*node)->owner);
+		if (rc != KNOT_EOK) {
+			dbg_zone("Error saving domain names from "
+					  "RRSIGs to the domain name table.\n "
+					  "The zone may be in an inconsistent "
+					  "state.\n");
+			// WARNING: the zone is not in consistent state now -
+			// there may be domain names in it that are not inserted
+			// into the domain table
+			return rc;
+		}
+	}
+
+	// replace RRSet's owner with the node's owner (that is already in the
+	// table)
+	/*! \todo Do even if domain table is not used? */
+	if (rrset->owner != (*node)->owner) {
+		knot_rrset_set_owner(rrset, (*node)->owner);
+	}
+
+	dbg_zone("NSEC3 OK\n");
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_remove_node(knot_zone_contents_t *contents, 
+	const knot_node_t *node, knot_zone_tree_node_t **removed_tree, 
+	ck_hash_table_item_t **removed_hash)
+{
+	if (contents == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	const knot_dname_t *owner = knot_node_owner(node);
+
+	// 1) remove the node from hash table
+	*removed_hash = NULL;
+	*removed_hash = ck_remove_item(contents->table, 
+	                               (const char *)knot_dname_name(owner),
+	                               knot_dname_size(owner));
+//	int ret = ck_detete_item(contents->table,
+//	               (const char *)knot_dname_name(owner),
+//	               knot_dname_size(owner), NULL, 0);
+	if (*removed_hash == NULL) {
+		return KNOT_ENONODE;
+	}
+
+	// 2) remove the node from the zone tree
+	*removed_tree = NULL;
+	int ret = knot_zone_tree_remove(contents->nodes, owner, removed_tree);
+	if (ret != KNOT_EOK) {
+		return KNOT_ENONODE;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_remove_nsec3_node(knot_zone_contents_t *contents, 
+	const knot_node_t *node, knot_zone_tree_node_t **removed)
+{
+	if (contents == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	const knot_dname_t *owner = knot_node_owner(node);
+
+	// remove the node from the zone tree
+	*removed = NULL;
+	int ret = knot_zone_tree_remove(contents->nsec3_nodes, owner, removed);
+	if (ret != KNOT_EOK) {
+		return KNOT_ENONODE;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_create_and_fill_hash_table(
+	knot_zone_contents_t *zone)
+{
+	if (zone == NULL || zone->apex == NULL || zone->apex->owner == NULL) {
+		return KNOT_EBADARG;
+	}
+	/*
+	 * 1) Create hash table.
+	 */
+#ifdef USE_HASH_TABLE
+	if (zone->node_count > 0) {
+		zone->table = ck_create_table(zone->node_count);
+		if (zone->table == NULL) {
+			return KNOT_ENOMEM;
+		}
+
+		// insert the apex into the hash table
+		if (ck_insert_item(zone->table,
+		                (const char *)zone->apex->owner->name,
+		                zone->apex->owner->size,
+		                (void *)zone->apex) != 0) {
+			return KNOT_EHASH;
+		}
+	} else {
+		zone->table = NULL;
+		return KNOT_EOK;	// OK?
+	}
+
+	/*
+	 * 2) Fill in the hash table.
+	 *
+	 * In this point, the nodes in the zone must be adjusted, so that only
+	 * relevant nodes (authoritative and delegation points are inserted.
+	 *
+	 * TODO: how to know if this was successful??
+	 */
+	/*! \todo Replace by zone tree. */
+	int ret = knot_zone_tree_forward_apply_inorder(zone->nodes,
+	                               knot_zone_contents_node_to_hash, zone);
+	if (ret != KNOT_EOK) {
+		dbg_zone("Failed to insert nodes to hash table.\n");
+		return ret;
+	}
+
+#endif
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_zone_contents_get_node(const knot_zone_contents_t *zone,
+				    const knot_dname_t *name)
+{
+	if (zone == NULL || name == NULL) {
+		return NULL;
+	}
+
+	// create dummy node to use for lookup
+//	knot_node_t *tmp = knot_node_new((knot_dname_t *)name, NULL);
+//	knot_node_t *n = TREE_FIND(zone->tree, knot_node, avl, tmp);
+//	knot_node_free(&tmp, 0);
+
+	knot_node_t *n;
+	int ret = knot_zone_tree_get(zone->nodes, name, &n);
+	if (ret != KNOT_EOK) {
+		dbg_zone("Failed to find name in the zone tree.\n");
+		return NULL;
+	}
+
+	return n;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_zone_contents_get_nsec3_node(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	if (zone == NULL || name == NULL) {
+		return NULL;
+	}
+
+	// create dummy node to use for lookup
+//	knot_node_t *tmp = knot_node_new((knot_dname_t *)name, NULL);
+//	knot_node_t *n = TREE_FIND(zone->nsec3_nodes, knot_node, avl, tmp);
+//	knot_node_free(&tmp, 0);
+	knot_node_t *n;
+	int ret = knot_zone_tree_get(zone->nsec3_nodes, name, &n);
+
+	if (ret != KNOT_EOK) {
+		dbg_zone("Failed to find NSEC3 name in the zone tree."
+		                  "\n");
+		return NULL;
+	}
+
+	return n;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_zone_contents_find_node(
+	const knot_zone_contents_t *zone,const knot_dname_t *name)
+{
+	return knot_zone_contents_get_node(zone, name);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_find_dname(const knot_zone_contents_t *zone,
+                           const knot_dname_t *name,
+                           const knot_node_t **node,
+                           const knot_node_t **closest_encloser,
+                           const knot_node_t **previous)
+{
+	if (zone == NULL || name == NULL || node == NULL
+	    || closest_encloser == NULL || previous == NULL
+	    || zone->apex == NULL || zone->apex->owner == NULL) {
+		return KNOT_EBADARG;
+	}
+
+dbg_zone_exec(
+	char *name_str = knot_dname_to_str(name);
+	char *zone_str = knot_dname_to_str(zone->apex->owner);
+	dbg_zone("Searching for name %s in zone %s...\n",
+	                  name_str, zone_str);
+	free(name_str);
+	free(zone_str);
+);
+
+	if (knot_dname_compare(name, zone->apex->owner) == 0) {
+		*node = zone->apex;
+		*closest_encloser = *node;
+		return KNOT_ZONE_NAME_FOUND;
+	}
+
+	if (!knot_dname_is_subdomain(name, zone->apex->owner)) {
+		*node = NULL;
+		*closest_encloser = NULL;
+		return KNOT_EBADZONE;
+	}
+
+	knot_node_t *found = NULL, *prev = NULL;
+
+	int exact_match = knot_zone_contents_find_in_tree(zone->nodes, name,
+	                                                    &found, &prev);
+	assert(exact_match >= 0);
+	*node = found;
+	*previous = prev;
+
+dbg_zone_exec(
+	char *name_str = (*node) ? knot_dname_to_str((*node)->owner)
+	                         : "(nil)";
+	char *name_str2 = (*previous != NULL)
+	                  ? knot_dname_to_str((*previous)->owner)
+	                  : "(nil)";
+	dbg_zone("Search function returned %d, node %s and prev: %s\n",
+			  exact_match, name_str, name_str2);
+
+	if (*node) {
+		free(name_str);
+	}
+	if (*previous != NULL) {
+		free(name_str2);
+	}
+);
+
+	*closest_encloser = *node;
+
+	// there must be at least one node with domain name less or equal to
+	// the searched name if the name belongs to the zone (the root)
+	if (*node == NULL) {
+		return KNOT_EBADZONE;
+	}
+
+	// TODO: this could be replaced by saving pointer to closest encloser
+	//       in node
+
+	if (!exact_match) {
+		int matched_labels = knot_dname_matched_labels(
+				knot_node_owner((*closest_encloser)), name);
+		while (matched_labels < knot_dname_label_count(
+				knot_node_owner((*closest_encloser)))) {
+			(*closest_encloser) =
+				knot_node_parent((*closest_encloser), 1);
+			assert(*closest_encloser);
+		}
+	}
+dbg_zone_exec(
+	char *n = knot_dname_to_str(knot_node_owner((*closest_encloser)));
+	dbg_zone("Closest encloser: %s\n", n);
+	free(n);
+);
+
+	dbg_zone("find_dname() returning %d\n", exact_match);
+
+	return (exact_match)
+	       ? KNOT_ZONE_NAME_FOUND
+	       : KNOT_ZONE_NAME_NOT_FOUND;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_zone_contents_get_previous(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	if (zone == NULL || name == NULL) {
+		return NULL;
+	}
+
+	knot_node_t *found = NULL, *prev = NULL;
+
+	int exact_match = knot_zone_contents_find_in_tree(zone->nodes, name,
+	                                                    &found, &prev);
+	assert(exact_match >= 0);
+	assert(prev != NULL);
+
+	return prev;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_zone_contents_find_previous(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	return knot_zone_contents_get_previous(zone, name);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_zone_contents_get_previous_nsec3(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	if (zone == NULL || name == NULL) {
+		return NULL;
+	}
+
+	knot_node_t *found = NULL, *prev = NULL;
+
+	int exact_match = knot_zone_contents_find_in_tree(zone->nsec3_nodes,
+	                                                   name, &found, &prev);
+	assert(exact_match >= 0);
+	assert(prev != NULL);
+
+	return prev;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_zone_contents_find_previous_nsec3(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	return knot_zone_contents_get_previous(zone, name);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_zone_contents_left_chop(char *name, size_t *size)
+{
+	short label_size = name[0];
+	
+	memmove(name, name + label_size + 1, *size -label_size - 1);
+	*size = *size - label_size - 1;
+}
+
+/*----------------------------------------------------------------------------*/
+#ifdef USE_HASH_TABLE
+int knot_zone_contents_find_dname_hash(const knot_zone_contents_t *zone,
+                                const knot_dname_t *name,
+                                const knot_node_t **node,
+                                const knot_node_t **closest_encloser)
+{
+	if (zone == NULL || name == NULL || node == NULL
+	    || closest_encloser == NULL) {
+		return KNOT_EBADARG;
+	}
+
+dbg_zone_exec(
+	char *name_str = knot_dname_to_str(name);
+	char *zone_str = knot_dname_to_str(zone->apex->owner);
+	dbg_zone("Searching for name %s in zone %s...\n",
+	                  name_str, zone_str);
+	free(name_str);
+	free(zone_str);
+);
+
+	if (knot_dname_compare(name, zone->apex->owner) == 0) {
+		*node = zone->apex;
+		*closest_encloser = *node;
+		return KNOT_ZONE_NAME_FOUND;
+	}
+
+	if (!knot_dname_is_subdomain(name, zone->apex->owner)) {
+		*node = NULL;
+		*closest_encloser = NULL;
+		return KNOT_EBADZONE;
+	}
+	
+	// temporary name used for hashing
+	char name_tmp[KNOT_MAX_DNAME_LENGTH];
+	size_t name_size = name->size;
+	if (knot_dname_to_lower_copy(name, name_tmp, KNOT_MAX_DNAME_LENGTH)
+	    != KNOT_EOK) {
+		return KNOT_ERROR;
+	}
+
+	const ck_hash_table_item_t *item = ck_find_item(zone->table,
+	                                                name_tmp, name_size);
+
+	if (item != NULL) {
+		*node = (const knot_node_t *)item->value;
+		*closest_encloser = *node;
+
+		dbg_zone("Found node in hash table: %p (owner %p, "
+		                  "labels: %d)\n", *node, (*node)->owner,
+		                  knot_dname_label_count((*node)->owner));
+		assert(*node != NULL);
+		assert(*closest_encloser != NULL);
+		return KNOT_ZONE_NAME_FOUND;
+	}
+
+	*node = NULL;
+
+	// chop leftmost labels until some node is found
+	// copy the name for chopping
+	/* Local allocation, will be discarded. */
+	//knot_dname_t *name_copy = knot_dname_deep_copy(name);
+dbg_zone_exec(
+	//char *n = knot_dname_to_str(name_copy);
+	dbg_zone("Finding closest encloser..\nStarting with: %.*s\n", 
+			(int)name_size, name_tmp);
+	//free(n);
+);
+
+	while (item == NULL) {
+		//knot_dname_left_chop_no_copy(name_copy);
+		knot_zone_contents_left_chop(name_tmp, &name_size);
+dbg_zone_exec(
+		//char *n = knot_dname_to_str(name_copy);
+		dbg_zone("Chopped leftmost label: %.*s\n",
+				(int)name_size, name_tmp);
+		//free(n);
+);
+		// not satisfied in root zone!!
+		//assert(name_copy->label_count > 0);
+		assert(name_size > 0);
+
+		item = ck_find_item(zone->table, name_tmp, name_size);
+	}
+
+	/* Directly discard. */
+	//knot_dname_free(&name_copy);
+
+	assert(item != NULL);
+	*closest_encloser = (const knot_node_t *)item->value;
+
+	return KNOT_ZONE_NAME_NOT_FOUND;
+}
+#endif
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_zone_contents_find_nsec3_node(
+	const knot_zone_contents_t *zone, const knot_dname_t *name)
+{
+	return knot_zone_contents_get_nsec3_node(zone, name);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_find_nsec3_for_name(const knot_zone_contents_t *zone,
+                                    const knot_dname_t *name,
+                                    const knot_node_t **nsec3_node,
+                                    const knot_node_t **nsec3_previous,
+				    int check_ver)
+{
+	if (zone == NULL || name == NULL
+	    || nsec3_node == NULL || nsec3_previous == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_dname_t *nsec3_name = NULL;
+	int ret = knot_zone_contents_nsec3_name(zone, name, &nsec3_name);
+
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+dbg_zone_exec(
+	char *n = knot_dname_to_str(nsec3_name);
+	dbg_zone("NSEC3 node name: %s.\n", n);
+	free(n);
+);
+
+	const knot_node_t *found = NULL, *prev = NULL;
+
+	// create dummy node to use for lookup
+	int exact_match = knot_zone_tree_find_less_or_equal(
+		zone->nsec3_nodes, nsec3_name, &found, &prev, check_ver);
+	assert(exact_match >= 0);
+
+	knot_dname_release(nsec3_name);
+
+dbg_zone_exec(
+	if (found) {
+		char *n = knot_dname_to_str(found->owner);
+		dbg_zone("Found NSEC3 node: %s.\n", n);
+		free(n);
+	} else {
+		dbg_zone("Found no NSEC3 node.\n");
+	}
+
+	if (prev) {
+		assert(prev->owner);
+		char *n = knot_dname_to_str(prev->owner);
+		dbg_zone("Found previous NSEC3 node: %s.\n", n);
+		free(n);
+	} else {
+		dbg_zone("Found no previous NSEC3 node.\n");
+	}
+);
+	*nsec3_node = found;
+
+	if (prev == NULL) {
+		// either the returned node is the root of the tree, or it is
+		// the leftmost node in the tree; in both cases node was found
+		// set the previous node of the found node
+		assert(exact_match);
+		assert(*nsec3_node != NULL);
+		*nsec3_previous = knot_node_previous(*nsec3_node, check_ver);
+	} else {
+		*nsec3_previous = prev;
+	}
+
+	dbg_zone("find_nsec3_for_name() returning %d\n", exact_match);
+
+	return (exact_match)
+	       ? KNOT_ZONE_NAME_FOUND
+	       : KNOT_ZONE_NAME_NOT_FOUND;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_node_t *knot_zone_contents_apex(
+	const knot_zone_contents_t *zone)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	return zone->apex;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_node_t *knot_zone_contents_get_apex(const knot_zone_contents_t *zone)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	return zone->apex;
+}
+
+/*----------------------------------------------------------------------------*/
+
+//knot_dname_t *knot_zone_contents_name(const knot_zone_contents_t *zone)
+//{
+//	if (zone == NULL) {
+//		return NULL;
+//	}
+
+//	return zone->name;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_adjust(knot_zone_contents_t *zone, int check_ver)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// load NSEC3PARAM (needed on adjusting function)
+	knot_zone_contents_load_nsec3param(zone);
+
+	knot_zone_adjust_arg_t adjust_arg;
+	adjust_arg.zone = zone;
+	adjust_arg.first_node = NULL;
+	adjust_arg.previous_node = NULL;
+	adjust_arg.check_ver = check_ver;
+
+	dbg_zone("Adjusting normal nodes.\n");
+	int ret = knot_zone_tree_forward_apply_inorder(zone->nodes,
+	                        knot_zone_contents_adjust_node_in_tree,
+	                        &adjust_arg);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+	dbg_zone("Done.\n");
+
+	assert(zone->apex == adjust_arg.first_node);
+	knot_node_set_previous(zone->apex, adjust_arg.previous_node);
+
+	adjust_arg.first_node = NULL;
+	adjust_arg.previous_node = NULL;
+
+	dbg_zone("Adjusting NSEC3 nodes.\n");
+	ret = knot_zone_tree_forward_apply_inorder(
+	              zone->nsec3_nodes,
+	              knot_zone_contents_adjust_nsec3_node_in_tree,
+	                        &adjust_arg);
+
+	dbg_zone("Done.\n");
+	if (adjust_arg.first_node) {
+		knot_node_set_previous(adjust_arg.first_node,
+		                         adjust_arg.previous_node);
+	}
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_load_nsec3param(knot_zone_contents_t *zone)
+{
+	if (zone == NULL || zone->apex == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	const knot_rrset_t *rrset = knot_node_rrset(zone->apex,
+						      KNOT_RRTYPE_NSEC3PARAM);
+
+	if (rrset != NULL) {
+		knot_nsec3_params_from_wire(&zone->nsec3_params, rrset);
+	} else {
+		memset(&zone->nsec3_params, 0, sizeof(knot_nsec3_params_t));
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_nsec3_enabled(const knot_zone_contents_t *zone)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	//return (zone->nsec3_params.algorithm != 0);
+	return (zone->nsec3_nodes->th_root != NULL);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_nsec3_params_t *knot_zone_contents_nsec3params(
+	const knot_zone_contents_t *zone)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	if (knot_zone_contents_nsec3_enabled(zone)) {
+		return &zone->nsec3_params;
+	} else {
+		return NULL;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_tree_apply_postorder(knot_zone_contents_t *zone,
+                              void (*function)(knot_node_t *node, void *data),
+                              void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_forward_apply_postorder(zone->nodes,
+	                                            knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_tree_apply_inorder(knot_zone_contents_t *zone,
+			      void (*function)(knot_node_t *node, void *data),
+                              void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_forward_apply_inorder(zone->nodes,
+	                                            knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_tree_apply_inorder_reverse(
+	knot_zone_contents_t *zone,
+	void (*function)(knot_node_t *node, void *data), void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_reverse_apply_inorder(zone->nodes,
+	                                          knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_nsec3_apply_postorder(knot_zone_contents_t *zone,
+                              void (*function)(knot_node_t *node, void *data),
+                              void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_forward_apply_postorder(
+			zone->nsec3_nodes, knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_nsec3_apply_inorder(knot_zone_contents_t *zone,
+			      void (*function)(knot_node_t *node, void *data),
+                              void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_forward_apply_inorder(
+			zone->nsec3_nodes, knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_nsec3_apply_inorder_reverse(
+	knot_zone_contents_t *zone,
+	void (*function)(knot_node_t *node, void *data), void *data)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_func_t f;
+	f.func = function;
+	f.data = data;
+
+	return knot_zone_tree_reverse_apply_inorder(
+			zone->nsec3_nodes, knot_zone_tree_apply, &f);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_tree_t *knot_zone_contents_get_nodes(
+		knot_zone_contents_t *contents)
+{
+	return contents->nodes;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_tree_t *knot_zone_contents_get_nsec3_nodes(
+		knot_zone_contents_t *contents)
+{
+	return contents->nsec3_nodes;
+}
+
+/*----------------------------------------------------------------------------*/
+
+ck_hash_table_t *knot_zone_contents_get_hash_table(
+		knot_zone_contents_t *contents)
+{
+	return contents->table;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_dname_table_apply(knot_zone_contents_t *contents,
+                                           void (*function)(knot_dname_t *,
+                                                            void *),
+                                           void *data)
+{
+	if (contents == NULL || function == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_dname_table_tree_inorder_apply(contents->dname_table,
+	                                    function, data);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_contents_shallow_copy(const knot_zone_contents_t *from,
+                             knot_zone_contents_t **to)
+{
+	if (from == NULL || to == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	/* Copy to same destination as source. */
+	if (from == *to) {
+		return KNOT_EBADARG;
+	}
+
+	int ret = KNOT_EOK;
+
+	knot_zone_contents_t *contents = (knot_zone_contents_t *)calloc(
+	                                     1, sizeof(knot_zone_contents_t));
+	if (contents == NULL) {
+		ERR_ALLOC_FAILED;
+		return KNOT_ENOMEM;
+	}
+
+	contents->apex = from->apex;
+
+	contents->nodes = malloc(sizeof(knot_zone_tree_t));
+	if (contents->nodes == NULL) {
+		ERR_ALLOC_FAILED;
+		ret = KNOT_ENOMEM;
+		goto cleanup;
+	}
+
+	contents->nsec3_nodes = malloc(sizeof(knot_zone_tree_t));
+	if (contents->nsec3_nodes == NULL) {
+		ERR_ALLOC_FAILED;
+		ret = KNOT_ENOMEM;
+		goto cleanup;
+	}
+
+	if (from->dname_table != NULL) {
+		contents->dname_table = knot_dname_table_new();
+		if (contents->dname_table == NULL) {
+			ERR_ALLOC_FAILED;
+			ret = KNOT_ENOMEM;
+			goto cleanup;
+		}
+		if ((ret = knot_dname_table_shallow_copy(from->dname_table,
+		                        contents->dname_table)) != KNOT_EOK) {
+			goto cleanup;
+		}
+	} else {
+		contents->dname_table = NULL;
+	}
+
+	contents->node_count = from->node_count;
+	contents->generation = from->generation;
+
+	contents->zone = from->zone;
+
+	/* Initialize NSEC3 params */
+	memcpy(&contents->nsec3_params, &from->nsec3_params,
+	       sizeof(knot_nsec3_params_t));
+
+	if ((ret = knot_zone_tree_shallow_copy(from->nodes,
+	                                 contents->nodes)) != KNOT_EOK
+	    || (ret = knot_zone_tree_shallow_copy(from->nsec3_nodes,
+	                                contents->nsec3_nodes)) != KNOT_EOK) {
+		goto cleanup;
+	}
+
+#ifdef USE_HASH_TABLE
+	if (from->table != NULL) {
+//		ret = ck_copy_table(from->table, &contents->table);
+		ret = ck_shallow_copy(from->table, &contents->table);
+		if (ret != 0) {
+			dbg_zone("knot_zone_contents_shallow_copy: "
+					"hash table copied\n");
+			ret = KNOT_ERROR;
+			goto cleanup;
+		}
+	}
+#endif
+
+	dbg_zone("knot_zone_contents_shallow_copy: "
+			"finished OK\n");
+
+	*to = contents;
+	return KNOT_EOK;
+
+cleanup:
+	knot_zone_tree_free(&contents->nodes);
+	knot_zone_tree_free(&contents->nsec3_nodes);
+	free(contents->dname_table);
+	free(contents);
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_contents_free(knot_zone_contents_t **contents)
+{
+	if (contents == NULL || *contents == NULL) {
+		return;
+	}
+
+	// free the zone tree, but only the structure
+	knot_zone_tree_free(&(*contents)->nodes);
+	knot_zone_tree_free(&(*contents)->nsec3_nodes);
+
+#ifdef USE_HASH_TABLE
+	if ((*contents)->table != NULL) {
+		ck_destroy_table(&(*contents)->table, NULL, 0);
+	}
+#endif
+	knot_nsec3_params_free(&(*contents)->nsec3_params);
+	
+	knot_dname_table_free(&(*contents)->dname_table);
+
+	free(*contents);
+	*contents = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_contents_deep_free(knot_zone_contents_t **contents,
+                                  int destroy_dname_table)
+{
+	if (contents == NULL || *contents == NULL) {
+		return;
+	}
+
+	if ((*contents) != NULL) {
+
+#ifdef USE_HASH_TABLE
+		if ((*contents)->table != NULL) {
+			ck_destroy_table(&(*contents)->table, NULL, 0);
+		}
+#endif
+		/* has to go through zone twice, rdata may contain references to
+		   node owners earlier in the zone which may be already freed */
+		/* NSEC3 tree is deleted first as it may contain references to
+		   the normal tree. */
+
+		knot_zone_tree_reverse_apply_postorder(
+			(*contents)->nsec3_nodes,
+			knot_zone_contents_destroy_node_rrsets_from_tree,
+			(void*)1);
+
+		knot_zone_tree_reverse_apply_postorder(
+			(*contents)->nsec3_nodes,
+			knot_zone_contents_destroy_node_owner_from_tree, 0);
+
+		knot_zone_tree_reverse_apply_postorder(
+			(*contents)->nodes,
+			knot_zone_contents_destroy_node_rrsets_from_tree,
+			(void*)1);
+
+		knot_zone_tree_reverse_apply_postorder(
+			(*contents)->nodes,
+			knot_zone_contents_destroy_node_owner_from_tree, 0);
+
+		// free the zone tree, but only the structure
+		// (nodes are already destroyed)
+		dbg_zone("Destroying zone tree.\n");
+		knot_zone_tree_free(&(*contents)->nodes);
+		dbg_zone("Destroying NSEC3 zone tree.\n");
+		knot_zone_tree_free(&(*contents)->nsec3_nodes);
+
+		knot_nsec3_params_free(&(*contents)->nsec3_params);
+
+		if (destroy_dname_table) {
+			/*
+			 * Hack, used in zcompile - destroys the table using
+			 * dname_free() instead of dname_retain().
+			 */
+			knot_dname_table_destroy(&(*contents)->dname_table);
+		} else {
+			knot_dname_table_deep_free(&(*contents)->dname_table);
+		}
+	}
+
+	free((*contents));
+	*contents = NULL;
+}
+
diff --git a/src/libknot/zone/zone-contents.h b/src/libknot/zone/zone-contents.h
new file mode 100644
index 0000000..2856f76
--- /dev/null
+++ b/src/libknot/zone/zone-contents.h
@@ -0,0 +1,556 @@
+/*!
+ * \file zone-contents.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Zone contents structure and API for manipulating it.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_ZONE_CONTENTS_H_
+#define _KNOT_ZONE_CONTENTS_H_
+
+//#include <time.h>
+
+#include "zone/node.h"
+#include "dname.h"
+#include "nsec3.h"
+#include "zone/dname-table.h"
+#include "common/tree.h"
+#include "hash/cuckoo-hash-table.h"
+
+#include "zone-tree.h"
+
+struct knot_zone;
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct knot_zone_contents_t {
+	knot_node_t *apex;       /*!< Apex node of the zone (holding SOA) */
+
+	ck_hash_table_t *table;     /*!< Hash table for holding zone nodes. */
+	knot_zone_tree_t *nodes;
+	knot_zone_tree_t *nsec3_nodes;
+
+	/*!
+	 * \todo Unify the use of this field - authoritative nodes vs. all.
+	 */
+	uint node_count;
+
+	knot_dname_table_t *dname_table;
+
+	knot_nsec3_params_t nsec3_params;
+
+	/*! \brief Generation of the zone during update.
+	 * 
+	 * Possible values:
+	 * -  0 - Original version of the zone. Old nodes should be used.
+	 * -  1 - New (updated) zone. New nodes should be used.
+	 * - -1 - New (updated) zone, but exactly the stored nodes should be
+	 *        used, no matter their generation.
+	 */
+	short generation;
+
+	struct knot_zone *zone;
+} knot_zone_contents_t;
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_contents_t *knot_zone_contents_new(knot_node_t *apex,
+                                                 uint node_count,
+                                                 int use_domain_table,
+                                                 struct knot_zone *zone);
+
+time_t knot_zone_contents_version(const knot_zone_contents_t *contents);
+
+void knot_zone_contents_set_version(knot_zone_contents_t *contents,
+                                      time_t version);
+
+//short knot_zone_contents_generation(const knot_zone_contents_t *contents);
+
+int knot_zone_contents_gen_is_old(const knot_zone_contents_t *contents);
+int knot_zone_contents_gen_is_new(const knot_zone_contents_t *contents);
+int knot_zone_contents_gen_is_finished(const knot_zone_contents_t *contents);
+
+//void knot_zone_contents_switch_generation(knot_zone_contents_t *contents);
+
+void knot_zone_contents_set_gen_old(knot_zone_contents_t *contents);
+void knot_zone_contents_set_gen_new(knot_zone_contents_t *contents);
+void knot_zone_contents_set_gen_new_finished(knot_zone_contents_t *contents);
+
+uint16_t knot_zone_contents_class(const knot_zone_contents_t *contents);
+
+/*!
+ * \brief Adds a node to the given zone.
+ *
+ * Checks if the node belongs to the zone, i.e. if its owner is a subdomain of
+ * the zone's apex. It thus also forbids adding node with the same name as the
+ * zone apex.
+ *
+ * \warning This function may destroy domain names saved in the node, that
+ *          are already present in the zone.
+ *
+ * \param zone Zone to add the node into.
+ * \param node Node to add into the zone.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EBADZONE
+ * \retval KNOT_EHASH
+ */
+int knot_zone_contents_add_node(knot_zone_contents_t *contents,
+                                  knot_node_t *node, int create_parents,
+                                  uint8_t flags, int use_domain_table);
+
+/*!
+ * \brief Adds a RRSet to the given zone.
+ *
+ * Checks if the RRSet belongs to the zone, i.e. if its owner is a subdomain of
+ * the zone's apex. The RRSet is inserted only if the node is given, or if
+ * a node where the RRSet should belong is found in the zone.
+ *
+ * \warning The function does not check if the node is already inserted in the
+ *          zone, just assumes that it is.
+ * \warning This function may destroy domain names saved in the RRSet, that
+ *          are already present in the zone.
+ *
+ * \param zone Zone to add the node into.
+ * \param rrset RRSet to add into the zone.
+ * \param node Node the RRSet should be inserted into. (Should be a node of the
+ *             given zone.) If set to NULL, the function will find proper node
+ *             and set it to this parameter.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EBADZONE
+ */
+int knot_zone_contents_add_rrset(knot_zone_contents_t *contents,
+                          knot_rrset_t *rrset,
+                          knot_node_t **node,
+                          knot_rrset_dupl_handling_t dupl,
+                          int use_domain_table);
+
+int knot_zone_contents_add_rrsigs(knot_zone_contents_t *contents,
+                           knot_rrset_t *rrsigs,
+                           knot_rrset_t **rrset, knot_node_t **node,
+                           knot_rrset_dupl_handling_t dupl,
+                           int use_domain_table);
+
+/*!
+ * \brief Adds a node holding NSEC3 records to the given zone.
+ *
+ * Checks if the node belongs to the zone, i.e. if its owner is a subdomain of
+ * the zone's apex. It does not check if the node really contains any NSEC3
+ * records, nor if the name is a hash (as there is actually no way of
+ * determining this).
+ *
+ * \param zone Zone to add the node into.
+ * \param node Node to add into the zone.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EBADZONE
+ */
+int knot_zone_contents_add_nsec3_node(knot_zone_contents_t *contents,
+                                        knot_node_t *node, int create_parents,
+                                        uint8_t flags, int use_domain_table);
+
+int knot_zone_contents_add_nsec3_rrset(knot_zone_contents_t *contents,
+                                         knot_rrset_t *rrset,
+                                         knot_node_t **node,
+                                         knot_rrset_dupl_handling_t dupl,
+                                         int use_domain_table);
+
+int knot_zone_contents_remove_node(knot_zone_contents_t *contents, 
+	const knot_node_t *node, knot_zone_tree_node_t **removed_tree, 
+	ck_hash_table_item_t **removed_hash);
+
+//knot_zone_tree_node_t *knot_zone_contents_remove_node(
+//	knot_zone_contents_t *contents, const knot_node_t *node);
+
+int knot_zone_contents_remove_nsec3_node(knot_zone_contents_t *contents, 
+	const knot_node_t *node, knot_zone_tree_node_t **removed);
+
+/*!
+ * \warning Always call knot_zone_adjust_dnames() prior to calling this
+ *          function. Otherwise the node count would not be set.
+ *
+ * \note Currently, all nodes (even non-authoritative) are inserted into the
+ *       hash table.
+ */
+int knot_zone_contents_create_and_fill_hash_table(
+	knot_zone_contents_t *contents);
+
+/*!
+ * \brief Tries to find a node with the specified name in the zone.
+ *
+ * \param zone Zone where the name should be searched for.
+ * \param name Name to find.
+ *
+ * \return Corresponding node if found, NULL otherwise.
+ */
+knot_node_t *knot_zone_contents_get_node(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+/*!
+ * \brief Tries to find a node with the specified name among the NSEC3 nodes
+ *        of the zone.
+ *
+ * \param zone Zone where the name should be searched for.
+ * \param name Name to find.
+ *
+ * \return Corresponding node if found, NULL otherwise.
+ */
+knot_node_t *knot_zone_contents_get_nsec3_node(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+/*!
+ * \brief Tries to find a node with the specified name in the zone.
+ *
+ * \note This function is identical to knot_zone_contents_get_node(), only it returns
+ *       constant reference.
+ *
+ * \param zone Zone where the name should be searched for.
+ * \param name Name to find.
+ *
+ * \return Corresponding node if found, NULL otherwise.
+ */
+const knot_node_t *knot_zone_contents_find_node(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+/*!
+ * \brief Tries to find domain name in the given zone using AVL tree.
+ *
+ * \param[in] zone Zone to search for the name.
+ * \param[in] name Domain name to search for.
+ * \param[out] node The found node (if it was found, otherwise it may contain
+ *                  arbitrary node).
+ * \param[out] closest_encloser Closest encloser of the given name in the zone.
+ * \param[out] previous Previous domain name in canonical order.
+ *
+ * \retval KNOT_ZONE_NAME_FOUND if node with owner \a name was found.
+ * \retval KNOT_ZONE_NAME_NOT_FOUND if it was not found.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EBADZONE
+ */
+int knot_zone_contents_find_dname(const knot_zone_contents_t *contents,
+                           const knot_dname_t *name,
+                           const knot_node_t **node,
+                           const knot_node_t **closest_encloser,
+                           const knot_node_t **previous);
+
+/*!
+ * \brief Finds previous name in canonical order to the given name in the zone.
+ *
+ * \param zone Zone to search for the name.
+ * \param name Domain name to find the previous domain name of.
+ *
+ * \return Previous node in canonical order, or NULL if some parameter is wrong.
+ */
+const knot_node_t *knot_zone_contents_find_previous(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+knot_node_t *knot_zone_contents_get_previous(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+const knot_node_t *knot_zone_contents_find_previous_nsec3(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+knot_node_t *knot_zone_contents_get_previous_nsec3(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+#ifdef USE_HASH_TABLE
+/*!
+ * \brief Tries to find domain name in the given zone using the hash table.
+ *
+ * \param[in] zone Zone to search for the name.
+ * \param[in] name Domain name to search for.
+ * \param[out] node The found node (if it was found, otherwise it may contain
+ *                  arbitrary node).
+ * \param[out] closest_encloser Closest encloser of the given name in the zone.
+ * \param[out] previous Previous domain name in canonical order.
+ *
+ * \retval KNOT_ZONE_NAME_FOUND if node with owner \a name was found.
+ * \retval KNOT_ZONE_NAME_NOT_FOUND if it was not found.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_EBADZONE
+ */
+int knot_zone_contents_find_dname_hash(const knot_zone_contents_t *contents,
+                                const knot_dname_t *name,
+                                const knot_node_t **node,
+                                const knot_node_t **closest_encloser);
+#endif
+
+/*!
+ * \brief Tries to find a node with the specified name among the NSEC3 nodes
+ *        of the zone.
+ *
+ * \note This function is identical to knot_zone_contents_get_nsec3_node(), only it
+ *       returns constant reference.
+ *
+ * \param zone Zone where the name should be searched for.
+ * \param name Name to find.
+ *
+ * \return Corresponding node if found, NULL otherwise.
+ */
+const knot_node_t *knot_zone_contents_find_nsec3_node(
+	const knot_zone_contents_t *contents, const knot_dname_t *name);
+
+/*!
+ * \brief Finds NSEC3 node and previous NSEC3 node in canonical order,
+ *        corresponding to the given domain name.
+ *
+ * This functions creates a NSEC3 hash of \a name and tries to find NSEC3 node
+ * with the hashed domain name as owner.
+ *
+ * \param[in] zone Zone to search in.
+ * \param[in] name Domain name to get the corresponding NSEC3 nodes for.
+ * \param[out] nsec3_node NSEC3 node corresponding to \a name (if found,
+ *                        otherwise this may be an arbitrary NSEC3 node).
+ * \param[out] nsec3_previous The NSEC3 node immediately preceding hashed domain
+ *                            name corresponding to \a name in canonical order.
+ *
+ * \retval KNOT_ZONE_NAME_FOUND if the corresponding NSEC3 node was found.
+ * \retval KNOT_ZONE_NAME_NOT_FOUND if it was not found.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENSEC3PAR
+ * \retval KNOT_ECRYPTO
+ * \retval KNOT_ERROR
+ */
+int knot_zone_contents_find_nsec3_for_name(
+                                    const knot_zone_contents_t *contents,
+                                    const knot_dname_t *name,
+                                    const knot_node_t **nsec3_node,
+                                    const knot_node_t **nsec3_previous,
+				    int check_ver);
+/*!
+ * \brief Returns the apex node of the zone.
+ *
+ * \param zone Zone to get the apex of.
+ *
+ * \return Zone apex node.
+ */
+const knot_node_t *knot_zone_contents_apex(
+	const knot_zone_contents_t *contents);
+
+knot_node_t *knot_zone_contents_get_apex(
+	const knot_zone_contents_t *contents);
+
+//knot_dname_t *knot_zone_contents_name(
+//	const knot_zone_contents_t *contents);
+
+/*!
+ * \brief Optimizes zone by replacing domain names in RDATA with references to
+ *        domain names present in zone (as node owners).
+ *
+ * \param zone Zone to adjust domain names in.
+ */
+int knot_zone_contents_adjust(knot_zone_contents_t *contents, int check_ver);
+
+/*!
+ * \brief Parses the NSEC3PARAM record stored in the zone.
+ *
+ * This function properly fills in the nsec3_params field of the zone structure
+ * according to data stored in the NSEC3PARAM record. This is necessary to do
+ * before any NSEC3 operations on the zone are requested, otherwise they will
+ * fail (error KNOT_ENSEC3PAR).
+ *
+ * \note If there is no NSEC3PARAM record in the zone, this function clears
+ *       the nsec3_params field of the zone structure (fills it with zeros).
+ *
+ * \param zone Zone to get the NSEC3PARAM record from.
+ */
+int knot_zone_contents_load_nsec3param(knot_zone_contents_t *contents);
+
+/*!
+ * \brief Checks if the zone uses NSEC3.
+ *
+ * This function will return 0 if the NSEC3PARAM record was not parse prior to
+ * calling it.
+ *
+ * \param zone Zone to check.
+ *
+ * \retval <> 0 if the zone uses NSEC3.
+ * \retval 0 if it does not.
+ *
+ * \see knot_zone_contents_load_nsec3param()
+ */
+int knot_zone_contents_nsec3_enabled(const knot_zone_contents_t *contents);
+
+/*!
+ * \brief Returns the parsed NSEC3PARAM record of the zone.
+ *
+ * \note You must parse the NSEC3PARAM record prior to calling this function
+ *       (knot_zone_contents_load_nsec3param()).
+ *
+ * \param zone Zone to get the NSEC3PARAM record from.
+ *
+ * \return Parsed NSEC3PARAM from the zone or NULL if the zone does not use
+ *         NSEC3 or the record was not parsed before.
+ *
+ * \see knot_zone_contents_load_nsec3param()
+ */
+const knot_nsec3_params_t *knot_zone_contents_nsec3params(
+	const knot_zone_contents_t *contents);
+
+/*!
+ * \brief Applies the given function to each regular node in the zone.
+ *
+ * This function uses post-order depth-first forward traversal, i.e. the
+ * function is first recursively applied to subtrees and then to the root.
+ *
+ * \param zone Nodes of this zone will be used as parameters for the function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_tree_apply_postorder(knot_zone_contents_t *contents,
+                              void (*function)(knot_node_t *node, void *data),
+                              void *data);
+
+/*!
+ * \brief Applies the given function to each regular node in the zone.
+ *
+ * This function uses in-order depth-first forward traversal, i.e. the function
+ * is first recursively applied to left subtree, then to the root and then to
+ * the right subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param zone Nodes of this zone will be used as parameters for the function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_tree_apply_inorder(knot_zone_contents_t *contents,
+			      void (*function)(knot_node_t *node, void *data),
+                              void *data);
+
+/*!
+ * \brief Applies the given function to each regular node in the zone.
+ *
+ * This function uses in-order depth-first reverse traversal, i.e. the function
+ * is first recursively applied to right subtree, then to the root and then to
+ * the left subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param zone Nodes of this zone will be used as parameters for the function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_tree_apply_inorder_reverse(
+	knot_zone_contents_t *contents,
+	void (*function)(knot_node_t *node, void *data), void *data);
+
+/*!
+ * \brief Applies the given function to each NSEC3 node in the zone.
+ *
+ * This function uses post-order depth-first forward traversal, i.e. the
+ * function is first recursively applied to subtrees and then to the root.
+ *
+ * \param zone NSEC3 nodes of this zone will be used as parameters for the
+ *             function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_nsec3_apply_postorder(knot_zone_contents_t *contents,
+                              void (*function)(knot_node_t *node, void *data),
+                              void *data);
+
+/*!
+ * \brief Applies the given function to each NSEC3 node in the zone.
+ *
+ * This function uses in-order depth-first forward traversal, i.e. the function
+ * is first recursively applied to left subtree, then to the root and then to
+ * the right subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param zone NSEC3 nodes of this zone will be used as parameters for the
+ *             function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_nsec3_apply_inorder(knot_zone_contents_t *contents,
+			      void (*function)(knot_node_t *node, void *data),
+                              void *data);
+
+/*!
+ * \brief Applies the given function to each NSEC3 node in the zone.
+ *
+ * This function uses in-order depth-first reverse traversal, i.e. the function
+ * is first recursively applied to right subtree, then to the root and then to
+ * the left subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param zone NSEC3 nodes of this zone will be used as parameters for the
+ *             function.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ */
+int knot_zone_contents_nsec3_apply_inorder_reverse(
+	knot_zone_contents_t *contents,
+	void (*function)(knot_node_t *node, void *data), void *data);
+
+knot_zone_tree_t *knot_zone_contents_get_nodes(
+		knot_zone_contents_t *contents);
+
+knot_zone_tree_t *knot_zone_contents_get_nsec3_nodes(
+		knot_zone_contents_t *contents);
+
+ck_hash_table_t *knot_zone_contents_get_hash_table(
+		knot_zone_contents_t *contents);
+
+int knot_zone_contents_dname_table_apply(knot_zone_contents_t *contents,
+                                           void (*function)(knot_dname_t *,
+                                                            void *),
+                                           void *data);
+
+/*!
+ * \brief Creates a shallow copy of the zone (no stored data are copied).
+ *
+ * This function creates a new zone structure in \a to, creates new trees for
+ * regular nodes and for NSEC3 nodes, creates new hash table and a new domain
+ * table. It also fills these structures with the exact same data as the
+ * original zone is - no copying of stored data is done, just pointers are
+ * copied.
+ *
+ * \param from Original zone.
+ * \param to Copy of the zone.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_contents_shallow_copy(const knot_zone_contents_t *from,
+                                      knot_zone_contents_t **to);
+
+void knot_zone_contents_free(knot_zone_contents_t **contents);
+
+void knot_zone_contents_deep_free(knot_zone_contents_t **contents,
+                                  int destroy_dname_table);
+
+#endif
+
+/*! @} */
diff --git a/src/libknot/zone/zone-tree.c b/src/libknot/zone/zone-tree.c
new file mode 100644
index 0000000..cdf128e
--- /dev/null
+++ b/src/libknot/zone/zone-tree.c
@@ -0,0 +1,470 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "zone-tree.h"
+#include "zone/node.h"
+#include "util/error.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+
+// AVL tree functions
+TREE_DEFINE(knot_zone_tree_node, avl);
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_zone_tree_node_compare(knot_zone_tree_node_t *node1,
+                                         knot_zone_tree_node_t *node2)
+{
+	assert(node1 != NULL);
+	assert(node2 != NULL);
+	assert(node1->node != NULL);
+	assert(node2->node != NULL);
+	assert(knot_node_owner(node1->node) != NULL);
+	assert(knot_node_owner(node2->node) != NULL);
+
+	return knot_node_compare(node1->node, node2->node);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_zone_tree_delete_subtree(knot_zone_tree_node_t *root)
+{
+	if (root == NULL) {
+		return;
+	}
+
+	knot_zone_tree_delete_subtree(root->avl.avl_left);
+	knot_zone_tree_delete_subtree(root->avl.avl_right);
+	free(root);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int knot_zone_tree_copy_node(knot_zone_tree_node_t *from,
+                                      knot_zone_tree_node_t **to)
+{
+	if (from == NULL) {
+		*to = NULL;
+		return KNOT_EOK;
+	}
+
+	*to = (knot_zone_tree_node_t *)
+	      malloc(sizeof(knot_zone_tree_node_t));
+	if (*to == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	(*to)->node = from->node;
+	(*to)->avl.avl_height = from->avl.avl_height;
+
+	int ret = knot_zone_tree_copy_node(from->avl.avl_left,
+	                                     &(*to)->avl.avl_left);
+	if (ret != KNOT_EOK) {
+		return ret;
+	}
+
+	ret = knot_zone_tree_copy_node(from->avl.avl_right,
+	                                 &(*to)->avl.avl_right);
+	if (ret != KNOT_EOK) {
+		knot_zone_tree_delete_subtree((*to)->avl.avl_left);
+		(*to)->avl.avl_left = NULL;
+		return ret;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void knot_zone_tree_free_node(knot_zone_tree_node_t *node,
+                                       int free_data, int free_owner)
+{
+	if (node == NULL) {
+		return;
+	}
+
+	knot_zone_tree_free_node(node->avl.avl_left, free_data, free_owner);
+
+	knot_zone_tree_free_node(node->avl.avl_right, free_data, free_owner);
+
+	if (free_data) {
+		knot_node_free(&node->node, free_owner, 0);
+	}
+
+	free(node);
+}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_init(knot_zone_tree_t *tree)
+{
+	if (tree == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	TREE_INIT(tree, knot_zone_tree_node_compare);
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_insert(knot_zone_tree_t *tree, knot_node_t *node)
+{
+	if (tree == NULL || node == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_node_t *znode = (knot_zone_tree_node_t *)malloc(
+	                                       sizeof(knot_zone_tree_node_t));
+	if (znode == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	znode->node = node;
+	znode->avl.avl_left = NULL;
+	znode->avl.avl_right = NULL;
+	znode->avl.avl_height = 0;
+
+	/*! \todo How to know if this was successful? */
+	TREE_INSERT(tree, knot_zone_tree_node, avl, znode);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_find(knot_zone_tree_t *tree, const knot_dname_t *owner,
+                          const knot_node_t **found)
+{
+	if (tree == NULL || owner == NULL || found == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	knot_node_t *f = NULL;
+	int ret = knot_zone_tree_get(tree, owner, &f);
+	*found = f;
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_get(knot_zone_tree_t *tree, const knot_dname_t *owner,
+                         knot_node_t **found)
+{
+	if (tree == NULL || owner == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	*found = NULL;
+
+	// create dummy node to use for lookup
+	knot_zone_tree_node_t *tmp = (knot_zone_tree_node_t *)malloc(
+	                                       sizeof(knot_zone_tree_node_t));
+	if (tmp == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	// create dummy data node to use for lookup
+	knot_node_t *tmp_data = knot_node_new(
+	                              (knot_dname_t *)owner, NULL, 0);
+	if (tmp_data == NULL) {
+		free(tmp);
+		return KNOT_ENOMEM;
+	}
+	tmp->node = tmp_data;
+
+	knot_zone_tree_node_t *n = TREE_FIND(tree, knot_zone_tree_node, avl,
+	                                       tmp);
+
+	knot_node_free(&tmp_data, 0, 0);
+	free(tmp);
+
+	if (n != NULL) {
+		*found = n->node;
+	}
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_find_less_or_equal(knot_zone_tree_t *tree,
+                                        const knot_dname_t *owner,
+                                        const knot_node_t **found,
+                                        const knot_node_t **previous,
+                                        int check_version)
+{
+	if (tree == NULL || owner == NULL || found == NULL || previous == NULL) {
+		return KNOT_EBADARG;
+	}
+	
+	knot_node_t *f, *p;
+	int ret = knot_zone_tree_get_less_or_equal(tree, owner, &f, &p, check_version);
+
+	*found = f;
+	*previous = p;
+
+	return ret;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_get_less_or_equal(knot_zone_tree_t *tree,
+                                       const knot_dname_t *owner,
+                                       knot_node_t **found,
+                                       knot_node_t **previous,
+                                       int check_version)
+{
+	if (tree == NULL || owner == NULL || found == NULL
+	    || previous == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	knot_zone_tree_node_t *f = NULL, *prev = NULL;
+
+	// create dummy node to use for lookup
+	knot_zone_tree_node_t *tmp = (knot_zone_tree_node_t *)malloc(
+	                                       sizeof(knot_zone_tree_node_t));
+	if (tmp == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	// create dummy data node to use for lookup
+	knot_node_t *tmp_data = knot_node_new(
+	                              (knot_dname_t *)owner, NULL, 0);
+	if (tmp_data == NULL) {
+		free(tmp);
+		return KNOT_ENOMEM;
+	}
+	tmp->node = tmp_data;
+
+	int exact_match = TREE_FIND_LESS_EQUAL(
+	                  tree, knot_zone_tree_node, avl, tmp, &f, &prev);
+
+	knot_node_free(&tmp_data, 0, 0);
+	free(tmp);
+
+	*found = (exact_match > 0) ? f->node : NULL;
+
+	if (exact_match < 0) {
+		// previous is not really previous but should be the leftmost
+		// node in the tree; take it's previous
+		assert(prev != NULL);
+		*previous = knot_node_get_previous(prev->node, check_version);
+		exact_match = 0;
+	} else if (prev == NULL) {
+		if (!exact_match) {
+			printf("Searched for owner %s in zone tree.\n",
+			       knot_dname_to_str(owner));
+			printf("Exact match: %d\n", exact_match);
+			printf("Found node: %p: %s.\n", f, (f)
+			    ? knot_dname_to_str(knot_node_owner(f->node))
+			    : "none");
+			printf("Previous node: %p: %s.\n", prev, (prev)
+			       ? knot_dname_to_str(knot_node_owner(prev->node))
+			       : "none");
+		}
+
+		// either the returned node is the root of the tree, or
+		// it is the leftmost node in the tree; in both cases
+		// node was found set the previous node of the found
+		// node
+		assert(exact_match > 0);
+		assert(f != NULL);
+		*previous = knot_node_get_previous(f->node, check_version);
+	} else {
+		// otherwise check if the previous node is not an empty
+		// non-terminal
+		/*! \todo Here we assume that the 'prev' pointer always points
+		 *        to an empty non-terminal.
+		 */
+		*previous = (knot_node_rrset_count(prev->node) == 0)
+		            ? knot_node_get_previous(prev->node, check_version)
+		            : prev->node;
+	}
+
+	assert(exact_match >= 0);
+
+	return exact_match;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_remove(knot_zone_tree_t *tree,
+                            const knot_dname_t *owner,
+                            knot_zone_tree_node_t **removed)
+{
+	if (tree == NULL || owner == NULL || removed == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	// create dummy node to use for lookup
+	knot_zone_tree_node_t *tmp = (knot_zone_tree_node_t *)malloc(
+	                                       sizeof(knot_zone_tree_node_t));
+	if (tmp == NULL) {
+		return KNOT_ENOMEM;
+	}
+
+	// create dummy data node to use for lookup
+	knot_node_t *tmp_data = knot_node_new(
+	                              (knot_dname_t *)owner, NULL, 0);
+	if (tmp_data == NULL) {
+		free(tmp);
+		return KNOT_ENOMEM;
+	}
+	tmp->node = tmp_data;
+
+	// we must first find the node, so that it may be destroyed
+	knot_zone_tree_node_t *n = TREE_FIND(tree, knot_zone_tree_node, avl,
+	                                       tmp);
+
+	/*! \todo How to know if this was successful? */
+	TREE_REMOVE(tree, knot_zone_tree_node, avl, tmp);
+
+	knot_node_free(&tmp_data, 0, 0);
+	free(tmp);
+
+//	*removed = (n) ? n->node : NULL;
+//	free(n);
+	*removed = n;
+	
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_forward_apply_inorder(knot_zone_tree_t *tree,
+                                           void (*function)(
+                                               knot_zone_tree_node_t *node,
+                                               void *data),
+                                           void *data)
+{
+	if (tree == NULL || function == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	TREE_FORWARD_APPLY(tree, knot_zone_tree_node, avl,
+	                   function, data);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_forward_apply_postorder(knot_zone_tree_t *tree,
+                                             void (*function)(
+                                                 knot_zone_tree_node_t *node,
+                                                 void *data),
+                                             void *data)
+{
+	if (tree == NULL || function == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	TREE_POST_ORDER_APPLY(tree, knot_zone_tree_node, avl,
+	                      function, data);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_reverse_apply_inorder(knot_zone_tree_t *tree,
+                                           void (*function)(
+                                               knot_zone_tree_node_t *node,
+                                               void *data),
+                                           void *data)
+{
+	if (tree == NULL || function == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	TREE_REVERSE_APPLY(tree, knot_zone_tree_node, avl,
+	                   function, data);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_reverse_apply_postorder(knot_zone_tree_t *tree,
+                                             void (*function)(
+                                                 knot_zone_tree_node_t *node,
+                                                 void *data),
+                                             void *data)
+{
+	if (tree == NULL || function == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	TREE_REVERSE_APPLY_POST(tree, knot_zone_tree_node, avl,
+	                        function, data);
+
+	return KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zone_tree_shallow_copy(knot_zone_tree_t *from,
+                                  knot_zone_tree_t *to)
+{
+	if (to == NULL || from == NULL) {
+		return KNOT_EBADARG;
+	}
+	/*
+	 * This function will copy the tree by hand, so that the nodes
+	 * do not have to be inserted the normal way. It should be substantially
+	 * faster.
+	 */
+
+	to->th_cmp = from->th_cmp;
+
+	return knot_zone_tree_copy_node(from->th_root, &to->th_root);
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_tree_free(knot_zone_tree_t **tree)
+{
+	if (tree == NULL || *tree == NULL) {
+		return;
+	}
+	knot_zone_tree_free_node((*tree)->th_root, 0, 0);
+	free(*tree);
+	*tree = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_tree_deep_free(knot_zone_tree_t **tree, int free_owners)
+{
+	if (tree == NULL || *tree == NULL) {
+		return;
+	}
+	knot_zone_tree_free_node((*tree)->th_root, 1, free_owners);
+	free(*tree);
+	*tree = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
diff --git a/src/libknot/zone/zone-tree.h b/src/libknot/zone/zone-tree.h
new file mode 100644
index 0000000..0971749
--- /dev/null
+++ b/src/libknot/zone/zone-tree.h
@@ -0,0 +1,300 @@
+/*!
+ * \file zone-tree.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Zone tree structure and API for manipulating it.
+ *
+ * Implemented as AVL tree.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_ZONE_TREE_H_
+#define _KNOT_ZONE_TREE_H_
+
+#include "common/tree.h"
+#include "zone/node.h"
+
+/*----------------------------------------------------------------------------*/
+
+typedef struct knot_zone_tree_node {
+	/*! \brief Structure for connecting this node to an AVL tree. */
+	TREE_ENTRY(knot_zone_tree_node) avl;
+	/*! \brief Zone tree data. */
+	knot_node_t *node;
+	/*! \brief Owner of the node. */
+//	knot_dname_t *owner;
+} knot_zone_tree_node_t;
+
+/*----------------------------------------------------------------------------*/
+
+typedef TREE_HEAD(knot_zone_tree, knot_zone_tree_node) knot_zone_tree_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Initializes the zone tree.
+ *
+ * Does not allocate the structure. Must be called before any use of the tree.
+ *
+ * \param tree Zone tree structure to initialize.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_zone_tree_init(knot_zone_tree_t *tree);
+
+/*!
+ * \brief Inserts the given node into the zone tree.
+ *
+ * \param tree Zone tree to insert the node into.
+ * \param node Node to insert.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_insert(knot_zone_tree_t *tree, knot_node_t *node);
+
+/*!
+ * \brief Finds node with the given owner in the zone tree.
+ *
+ * \param tree Zone tree to search in.
+ * \param owner Owner of the node to find.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_find(knot_zone_tree_t *tree,
+                          const knot_dname_t *owner,
+                          const knot_node_t **found);
+
+/*!
+ * \brief Finds node with the given owner in the zone tree.
+ *
+ * \note This function is identical to knot_zone_tree_find() except that it
+ *       returns non-const node.
+ *
+ * \param tree Zone tree to search in.
+ * \param owner Owner of the node to find.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_get(knot_zone_tree_t *tree,
+                         const knot_dname_t *owner,
+                         knot_node_t **found);
+
+/*!
+ * \brief Tries to find the given domain name in the zone tree and returns the
+ *        associated node and previous node in canonical order.
+ *
+ * \param zone Zone to search in.
+ * \param owner Owner of the node to find.
+ * \param found Found node.
+ * \param previous Previous node in canonical order (i.e. the one directly
+ *                 preceding \a owner in canonical order, regardless if the name
+ *                 is in the zone or not).
+ *
+ * \retval > 0 if the domain name was found. In such case \a found holds the
+ *             zone node with \a owner as its owner.
+ *             \a previous is set properly.
+ * \retval 0 if the domain name was not found. \a found may hold any (or none)
+ *           node. \a previous is set properly.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_find_less_or_equal(knot_zone_tree_t *tree,
+                                        const knot_dname_t *owner,
+                                        const knot_node_t **found,
+                                        const knot_node_t **previous,
+                                        int check_version);
+
+/*!
+ * \brief Tries to find the given domain name in the zone tree and returns the
+ *        associated node and previous node in canonical order.
+ *
+ * \note This function is identical to knot_zone_tree_find_less_or_equal()
+ *       except that it returns non-const nodes.
+ *
+ * \param zone Zone to search in.
+ * \param owner Owner of the node to find.
+ * \param found Found node.
+ * \param previous Previous node in canonical order (i.e. the one directly
+ *                 preceding \a owner in canonical order, regardless if the name
+ *                 is in the zone or not).
+ *
+ * \retval > 0 if the domain name was found. In such case \a found holds the
+ *             zone node with \a owner as its owner.
+ *             \a previous is set properly.
+ * \retval 0 if the domain name was not found. \a found may hold any (or none)
+ *           node. \a previous is set properly.
+ * \retval KNOT_EBADARG
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_get_less_or_equal(knot_zone_tree_t *tree,
+                                       const knot_dname_t *owner,
+                                       knot_node_t **found,
+                                       knot_node_t **previous,
+                                       int check_version);
+
+/*!
+ * \brief Removes node with the given owner from the zone tree and returns it.
+ *
+ * \param tree Zone tree to remove the node from.
+ * \param owner Owner of the node to find.
+ * \param removed The removed node.
+ *
+ * \retval The removed node.
+ */
+int knot_zone_tree_remove(knot_zone_tree_t *tree,
+                            const knot_dname_t *owner,
+                            knot_zone_tree_node_t **removed);
+
+/*!
+ * \brief Applies the given function to each node in the zone.
+ *
+ * This function uses in-order depth-first forward traversal, i.e. the function
+ * is first recursively applied to left subtree, then to the root and then to
+ * the right subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param tree Zone tree to apply the function to.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_zone_tree_forward_apply_inorder(knot_zone_tree_t *tree,
+                                           void (*function)(
+                                                  knot_zone_tree_node_t *node,
+                                                  void *data),
+                                           void *data);
+
+/*!
+ * \brief Applies the given function to each node in the zone.
+ *
+ * This function uses post-order depth-first forward traversal, i.e. the
+ * function is first recursively applied to subtrees and then to the root.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param tree Zone tree to apply the function to.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_zone_tree_forward_apply_postorder(knot_zone_tree_t *tree,
+                                             void (*function)(
+                                                  knot_zone_tree_node_t *node,
+                                                  void *data),
+                                             void *data);
+
+/*!
+ * \brief Applies the given function to each node in the zone.
+ *
+ * This function uses in-order depth-first reverse traversal, i.e. the function
+ * is first recursively applied to right subtree, then to the root and then to
+ * the left subtree.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param tree Zone tree to apply the function to.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_zone_tree_reverse_apply_inorder(knot_zone_tree_t *tree,
+                                           void (*function)(
+                                                  knot_zone_tree_node_t *node,
+                                                  void *data),
+                                           void *data);
+
+/*!
+ * \brief Applies the given function to each node in the zone.
+ *
+ * This function uses post-order depth-first reverse traversal, i.e. the
+ * function is first recursively applied to right subtree, then to the
+ * left subtree and then to the root.
+ *
+ * \note This implies that the zone is stored in a binary tree. Is there a way
+ *       to make this traversal independent on the underlying structure?
+ *
+ * \param tree Zone tree to apply the function to.
+ * \param function Function to be applied to each node of the zone.
+ * \param data Arbitrary data to be passed to the function.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EBADARG
+ */
+int knot_zone_tree_reverse_apply_postorder(knot_zone_tree_t *tree,
+                                             void (*function)(
+                                                  knot_zone_tree_node_t *node,
+                                                  void *data),
+                                             void *data);
+
+/*!
+ * \brief Copies the whole zone tree structure (but not the data contained
+ *        within).
+ *
+ * \warning This function does not check if the target zone tree is empty,
+ *          it just replaces the root pointer.
+ *
+ * \param from Original zone tree.
+ * \param to Zone tree to copy the original one into.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOMEM
+ */
+int knot_zone_tree_shallow_copy(knot_zone_tree_t *from, 
+                                  knot_zone_tree_t *to);
+
+/*!
+ * \brief Destroys the zone tree, not touching the saved data.
+ *
+ * \param tree Zone tree to be destroyed.
+ */
+void knot_zone_tree_free(knot_zone_tree_t **tree);
+
+/*!
+ * \brief Destroys the zone tree, together with the saved data.
+ *
+ * \param tree Zone tree to be destroyed.
+ * \param free_owners Set to <> 0 if owners of the nodes should be destroyed
+ *                    as well. Set to 0 otherwise.
+ */
+void knot_zone_tree_deep_free(knot_zone_tree_t **tree, int free_owners);
+
+/*----------------------------------------------------------------------------*/
+
+#endif // _KNOT_ZONE_TREE_H_
+
+/*! @} */
+
diff --git a/src/libknot/zone/zone.c b/src/libknot/zone/zone.c
new file mode 100644
index 0000000..9de1a53
--- /dev/null
+++ b/src/libknot/zone/zone.c
@@ -0,0 +1,246 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+
+#include <urcu.h>
+
+#include "common.h"
+#include "zone/zone.h"
+#include "zone/node.h"
+#include "dname.h"
+#include "consts.h"
+#include "util/descriptor.h"
+#include "nsec3.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "util/utils.h"
+#include "common/tree.h"
+#include "common/base32hex.h"
+#include "hash/cuckoo-hash-table.h"
+#include "zone/zone-contents.h"
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_zone_t *knot_zone_new_empty(knot_dname_t *name)
+{
+	if (!name) {
+		return 0;
+	}
+
+	dbg_zone("Creating new zone!\n");
+
+	knot_zone_t *zone = malloc(sizeof(knot_zone_t));
+	if (zone == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	memset(zone, 0, sizeof(knot_zone_t));
+
+	// save the zone name
+	dbg_zone("Setting zone name.\n");
+	zone->name = name;
+	return zone;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_t *knot_zone_new(knot_node_t *apex, uint node_count,
+                               int use_domain_table)
+{
+	knot_zone_t *zone = knot_zone_new_empty(
+			knot_dname_deep_copy(knot_node_owner(apex)));
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	dbg_zone("Creating zone contents.\n");
+	zone->contents = knot_zone_contents_new(apex, node_count,
+	                                          use_domain_table, zone);
+	if (zone->contents == NULL) {
+		knot_dname_release(zone->name);
+		free(zone);
+		return NULL;
+	}
+
+	zone->contents->zone = zone;
+
+	return zone;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_contents_t *knot_zone_get_contents(
+	const knot_zone_t *zone)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	return rcu_dereference(zone->contents);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_zone_contents_t *knot_zone_contents(
+	const knot_zone_t *zone)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	return rcu_dereference(zone->contents);
+}
+
+/*----------------------------------------------------------------------------*/
+
+time_t knot_zone_version(const knot_zone_t *zone)
+{
+	if (zone == NULL) {
+		return KNOT_EBADARG;
+	}
+
+	return zone->version;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_set_version(knot_zone_t *zone, time_t version)
+{
+	if (zone == NULL) {
+		return;
+	}
+
+	zone->version = version;
+}
+
+/*----------------------------------------------------------------------------*/
+
+short knot_zone_is_master(const knot_zone_t *zone)
+{
+	return zone->master;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_set_master(knot_zone_t *zone, short master)
+{
+	zone->master = master;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const void *knot_zone_data(const knot_zone_t *zone)
+{
+	return zone->data;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_set_data(knot_zone_t *zone, void *data)
+{
+	zone->data = data;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_dname_t *knot_zone_name(const knot_zone_t *zone)
+{
+	return zone->name;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_contents_t *knot_zone_switch_contents(knot_zone_t *zone,
+                                           knot_zone_contents_t *new_contents)
+{
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	knot_zone_contents_t *old_contents =
+		rcu_xchg_pointer(&zone->contents, new_contents);
+	return old_contents;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_free(knot_zone_t **zone)
+{
+	if (zone == NULL || *zone == NULL) {
+		return;
+	}
+
+	dbg_zone("zone_free().\n");
+
+	if ((*zone)->contents 
+	    && !knot_zone_contents_gen_is_old((*zone)->contents)) {
+		// zone is in the middle of an update, report
+		dbg_zone("Destroying zone that is in the middle of an "
+		                  "update.\n");
+	}
+
+	knot_dname_release((*zone)->name);
+
+	/* Call zone data destructor if exists. */
+	if ((*zone)->dtor) {
+		(*zone)->dtor(*zone);
+	}
+
+	knot_zone_contents_free(&(*zone)->contents);
+	free(*zone);
+	*zone = NULL;
+
+	dbg_zone("Done.\n");
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zone_deep_free(knot_zone_t **zone, int destroy_dname_table)
+{
+	if (zone == NULL || *zone == NULL) {
+		return;
+	}
+	
+	if ((*zone)->contents
+	    && !knot_zone_contents_gen_is_old((*zone)->contents)) {
+		// zone is in the middle of an update, report
+		dbg_zone("Destroying zone that is in the middle of an "
+		                  "update.\n");
+	}
+
+dbg_zone_exec(
+	char *name = knot_dname_to_str((*zone)->name);
+	dbg_zone("Destroying zone %p, name: %s.\n", *zone, name);
+	free(name);
+);
+
+	knot_dname_release((*zone)->name);
+
+	/* Call zone data destructor if exists. */
+	if ((*zone)->dtor) {
+		(*zone)->dtor(*zone);
+	}
+
+	knot_zone_contents_deep_free(&(*zone)->contents, destroy_dname_table);
+	free(*zone);
+	*zone = NULL;
+}
diff --git a/src/libknot/zone/zone.h b/src/libknot/zone/zone.h
new file mode 100644
index 0000000..331ef1f
--- /dev/null
+++ b/src/libknot/zone/zone.h
@@ -0,0 +1,157 @@
+/*!
+ * \file zone.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Zone structure and API for manipulating it.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_ZONE_H_
+#define _KNOT_ZONE_H_
+
+#include <time.h>
+
+#include "zone/node.h"
+#include "dname.h"
+#include "nsec3.h"
+#include "zone/dname-table.h"
+#include "common/tree.h"
+#include "hash/cuckoo-hash-table.h"
+
+#include "zone-tree.h"
+
+#include "zone/zone-contents.h"
+
+/*----------------------------------------------------------------------------*/
+
+//typedef TREE_HEAD(avl_tree, knot_node) avl_tree_t;
+//struct event_t;
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Return values for search functions.
+ *
+ * Used in knot_zone_find_dname() and knot_zone_find_dname_hash().
+ */
+enum knot_zone_retvals {
+	KNOT_ZONE_NAME_FOUND = 1,
+	KNOT_ZONE_NAME_NOT_FOUND = 0
+};
+
+typedef enum knot_zone_retvals knot_zone_retvals_t;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Structure for holding DNS zone.
+ *
+ * \warning Make sure not to insert the same nodes using both the normal and
+ *          NSEC3 functions. Although this will be successfull, it will produce
+ *          double-free errors when destroying the zone.
+ */
+struct knot_zone {
+	knot_dname_t *name;
+
+	knot_zone_contents_t *contents;
+
+	time_t version;
+
+	/*! \todo Set when loading zone. */
+	short master;
+
+	void *data; /*!< Pointer to generic zone-related data. */
+	int (*dtor)(struct knot_zone *); /*!< Data destructor. */
+};
+
+typedef struct knot_zone knot_zone_t;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Creates new empty DNS zone.
+ *
+ * \notice Zone will be created without contents.
+ *
+ * \param name Zone owner.
+ *
+ * \return The initialized zone structure or NULL if an error occured.
+ */
+knot_zone_t *knot_zone_new_empty(knot_dname_t *name);
+
+/*!
+ * \brief Creates new DNS zone.
+ *
+ * \param apex Node representing the zone apex.
+ * \param node_count Number of authorative nodes in the zone.
+ *
+ * \return The initialized zone structure or NULL if an error occured.
+ */
+knot_zone_t *knot_zone_new(knot_node_t *apex, uint node_count,
+                               int use_domain_table);
+
+knot_zone_contents_t *knot_zone_get_contents(
+	const knot_zone_t *zone);
+
+const knot_zone_contents_t *knot_zone_contents(
+	const knot_zone_t *zone);
+
+
+time_t knot_zone_version(const knot_zone_t *zone);
+
+void knot_zone_set_version(knot_zone_t *zone, time_t version);
+
+short knot_zone_is_master(const knot_zone_t *zone);
+
+void knot_zone_set_master(knot_zone_t *zone, short master);
+
+const void *knot_zone_data(const knot_zone_t *zone);
+
+void knot_zone_set_data(knot_zone_t *zone, void *data);
+
+const knot_dname_t *knot_zone_name(const knot_zone_t *zone);
+
+knot_zone_contents_t *knot_zone_switch_contents(knot_zone_t *zone,
+                                          knot_zone_contents_t *new_contents);
+
+/*!
+ * \brief Correctly deallocates the zone structure, without deleting its nodes.
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param zone Zone to be freed.
+ */
+void knot_zone_free(knot_zone_t **zone);
+
+/*!
+ * \brief Correctly deallocates the zone structure and all nodes within.
+ *
+ * Also sets the given pointer to NULL.
+ *
+ * \param zone Zone to be freed.
+ * \param free_rdata_dnames Set to <> 0 if you want to delete ALL domain names
+ *                          present in RDATA. Set to 0 otherwise. (See
+ *                          knot_rdata_deep_free().)
+ */
+void knot_zone_deep_free(knot_zone_t **zone, int destroy_dname_table);
+
+#endif
+
+/*! @} */
diff --git a/src/libknot/zone/zonedb.c b/src/libknot/zone/zonedb.c
new file mode 100644
index 0000000..8f07d45
--- /dev/null
+++ b/src/libknot/zone/zonedb.c
@@ -0,0 +1,389 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include <urcu.h>
+
+#include "common.h"
+#include "zone/zone.h"
+#include "zone/zonedb.h"
+#include "dname.h"
+#include "zone/node.h"
+#include "util/error.h"
+#include "util/debug.h"
+#include "common/general-tree.h"
+
+/*----------------------------------------------------------------------------*/
+/* Non-API functions                                                          */
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Compares the two arguments interpreted as zone names (domain names).
+ *
+ * Use this function with generic data structures (such as the skip list).
+ *
+ * \param d1 First zone name.
+ * \param d2 Second zone name.
+ *
+ * \retval 0 if the two zone names are equal.
+ * \retval < 0 if \a d1 is before \a d2 in canonical order.
+ * \retval > 0 if \a d1 is after \a d2 in canonical order.
+ */
+static int knot_zonedb_compare_zone_names(void *p1, void *p2)
+{
+	const knot_zone_t *zone1 = (const knot_zone_t *)p1;
+	const knot_zone_t *zone2 = (const knot_zone_t *)p2;
+
+	int ret = knot_dname_compare(zone1->name, zone2->name);
+
+dbg_zonedb_exec(
+	char *name1 = knot_dname_to_str(zone1->name);
+	char *name2 = knot_dname_to_str(zone2->name);
+	dbg_zonedb("Compared names %s and %s, result: %d.\n",
+			    name1, name2, ret);
+	free(name1);
+	free(name2);
+);
+
+	return (ret);
+}
+
+/*----------------------------------------------------------------------------*/
+
+//static int knot_zonedb_replace_zone_in_list(void **list_item, void **new_zone)
+//{
+//	assert(list_item != NULL);
+//	assert(*list_item != NULL);
+//	assert(new_zone != NULL);
+//	assert(*new_zone != NULL);
+
+//	dbg_zonedb("Replacing list item %p with new zone %p\n",
+//	                    *list_item, *new_zone);
+
+//	*list_item = *new_zone;
+
+//	return 0;
+//}
+
+/*----------------------------------------------------------------------------*/
+/* API functions                                                              */
+/*----------------------------------------------------------------------------*/
+
+knot_zonedb_t *knot_zonedb_new()
+{
+	knot_zonedb_t *db =
+		(knot_zonedb_t *)malloc(sizeof(knot_zonedb_t));
+	CHECK_ALLOC_LOG(db, NULL);
+
+	db->zone_tree = gen_tree_new(knot_zonedb_compare_zone_names);
+	if (db->zone_tree == NULL) {
+		free(db);
+		return NULL;
+	}
+	
+	db->zone_count = 0;
+
+	return db;
+}
+
+/*----------------------------------------------------------------------------*/
+
+int knot_zonedb_add_zone(knot_zonedb_t *db, knot_zone_t *zone)
+{
+	if (db == NULL || zone == NULL) {
+		return KNOT_EBADARG;
+	}
+dbg_zonedb_exec(
+	char *name = knot_dname_to_str(zone->name);
+	dbg_zonedb("Inserting zone %s into zone db.\n", name);
+	free(name);
+);
+
+	int ret = KNOT_EOK;
+	if (knot_zone_contents(zone)) {
+		ret = knot_zone_contents_load_nsec3param(
+				knot_zone_get_contents(zone));
+		if (ret != KNOT_EOK) {
+			return ret;
+		}
+	}
+
+	ret = gen_tree_add(db->zone_tree, zone, NULL);
+
+	if (ret == 0) {
+		db->zone_count++;
+	}
+
+	return (ret != 0) ? KNOT_EZONEIN : KNOT_EOK;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_t *knot_zonedb_remove_zone(knot_zonedb_t *db,
+                                     const knot_dname_t *zone_name)
+{
+	knot_zone_t dummy_zone;
+	memset(&dummy_zone, 0, sizeof(knot_zone_t));
+	dummy_zone.name = (knot_dname_t *)zone_name;
+
+	// add some lock to avoid multiple removals
+	knot_zone_t *z = (knot_zone_t *)gen_tree_find(db->zone_tree,
+	                                                  &dummy_zone);
+
+	if (z == NULL) {
+		return NULL;
+	}
+
+	// remove the zone from the skip list, but do not destroy it
+	gen_tree_remove(db->zone_tree, &dummy_zone);
+
+//	if (destroy_zone) {
+//		// properly destroy the zone and all its contents
+//		knot_zone_deep_free(&z, 0);
+//	}
+
+	db->zone_count--;
+
+	//return KNOT_EOK;
+	return z;
+}
+
+/*----------------------------------------------------------------------------*/
+
+//knot_zone_t *knot_zonedb_replace_zone(knot_zonedb_t *db,
+//                                          knot_zone_t *zone)
+//{
+//	knot_zone_t *z = knot_zonedb_find_zone(db,
+//		knot_node_owner(knot_zone_apex(zone)));
+//	if (z == NULL) {
+//		return NULL;
+//	}
+	
+//	/*! \todo The replace should be atomic!!! */
+
+//	dbg_zonedb("Found zone: %p\n", z);
+
+//	int ret = skip_remove(db->zones,
+//	                      (void *)knot_node_owner(knot_zone_apex(zone)),
+//	                      NULL, NULL);
+//	if (ret != 0) {
+//		return NULL;
+//	}
+
+//	dbg_zonedb("Removed zone, return value: %d\n", ret);
+//	dbg_zonedb("Old zone: %p\n", z);
+
+//	ret = skip_insert(db->zones,
+//	                  (void *)knot_node_owner(knot_zone_apex(zone)),
+//	                  (void *)zone, NULL);
+
+//	dbg_zonedb("Inserted zone, return value: %d\n", ret);
+
+//	if (ret != 0) {
+//		// return the removed zone back
+//		skip_insert(db->zones,
+//		            (void *)knot_node_owner(knot_zone_apex(z)),
+//		            (void *)z, NULL);
+//		/*! \todo There may be problems and the zone may remain
+//		          removed. */
+//		return NULL;
+//	}
+
+//	return z;
+//}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_t *knot_zonedb_find_zone(const knot_zonedb_t *db,
+                                       const knot_dname_t *zone_name)
+{
+	knot_zone_t dummy_zone;
+	dummy_zone.name = (knot_dname_t *)zone_name;
+	return (knot_zone_t *)gen_tree_find(db->zone_tree, &dummy_zone);
+}
+
+/*----------------------------------------------------------------------------*/
+
+const knot_zone_t *knot_zonedb_find_zone_for_name(knot_zonedb_t *db,
+                                                    const knot_dname_t *dname)
+{
+	if (db == NULL || dname == NULL) {
+		return NULL;
+	}
+
+	knot_zone_t dummy_zone;
+	dummy_zone.name = (knot_dname_t *)dname;
+	void *found = NULL;
+	int exact_match = gen_tree_find_less_or_equal(db->zone_tree,
+	                                              &dummy_zone,
+	                                              &found);
+	UNUSED(exact_match);
+
+	knot_zone_t *zone = (found) ? (knot_zone_t *)found : NULL;
+
+dbg_zonedb_exec(
+	char *name = knot_dname_to_str(dname);
+	dbg_zonedb("Found zone for name %s: %p\n", name, zone);
+	free(name);
+);
+	if (zone != NULL && zone->contents != NULL
+	    && knot_dname_compare(zone->contents->apex->owner, dname) != 0
+	    && !knot_dname_is_subdomain(dname, zone->contents->apex->owner)) {
+		zone = NULL;
+	}
+
+	return zone;
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zone_contents_t *knot_zonedb_expire_zone(knot_zonedb_t *db,
+                                              const knot_dname_t *zone_name)
+{
+	if (db == NULL || zone_name == NULL) {
+		return NULL;
+	}
+
+	// Remove the contents from the zone, but keep the zone in the zonedb.
+
+	knot_zone_t *zone = knot_zonedb_find_zone(db, zone_name);
+	if (zone == NULL) {
+		return NULL;
+	}
+
+	return knot_zone_switch_contents(zone, NULL);
+}
+
+/*----------------------------------------------------------------------------*/
+
+knot_zonedb_t *knot_zonedb_copy(const knot_zonedb_t *db)
+{
+	knot_zonedb_t *db_new =
+		(knot_zonedb_t *)malloc(sizeof(knot_zonedb_t));
+	CHECK_ALLOC_LOG(db_new, NULL);
+
+	db_new->zone_tree = gen_tree_shallow_copy(db->zone_tree);
+	if (db_new->zone_tree == NULL) {
+		free(db_new);
+		return NULL;
+	}
+
+	return db_new;
+}
+
+size_t knot_zonedb_zone_count(const knot_zonedb_t *db)
+{
+	return db->zone_count;
+}
+
+struct knot_zone_db_tree_arg {
+	const knot_zone_t **zones;
+	size_t count;
+};
+
+static void save_zone_to_array(void *node, void *data)
+{
+	knot_zone_t *zone = (knot_zone_t *)node;
+	struct knot_zone_db_tree_arg *args =
+		(struct knot_zone_db_tree_arg *)data;
+	assert(data);
+	args->zones[args->count++] = zone;
+}
+
+const knot_zone_t **knot_zonedb_zones(const knot_zonedb_t *db)
+{
+	struct knot_zone_db_tree_arg args;
+	args.zones = malloc(sizeof(knot_zone_t) * db->zone_count);
+	args.count = 0;
+	CHECK_ALLOC_LOG(args.zones, NULL);
+
+	gen_tree_apply_inorder(db->zone_tree, save_zone_to_array,
+	                       &args);
+	assert(db->zone_count == args.count);
+
+	return args.zones;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void knot_zonedb_free(knot_zonedb_t **db)
+{
+	gen_tree_destroy(&((*db)->zone_tree), NULL ,NULL);
+	free(*db);
+	*db = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void delete_zone_from_db(void *node, void *data)
+{
+	UNUSED(data);
+	knot_zone_t *zone = (knot_zone_t *)node;
+	assert(zone);
+	synchronize_rcu();
+	knot_zone_deep_free(&zone, 0);
+}
+
+void knot_zonedb_deep_free(knot_zonedb_t **db)
+{
+	dbg_zonedb("Deleting zone db (%p).\n", *db);
+//	dbg_zonedb("Is it empty (%p)? %s\n",
+//	       (*db)->zones, skip_is_empty((*db)->zones) ? "yes" : "no");
+
+//dbg_zonedb_exec(
+//	int i = 1;
+//	char *name = NULL;
+//	while (zn != NULL) {
+//		dbg_zonedb("%d. zone: %p, key: %p\n", i, zn->value,
+//		                    zn->key);
+//		assert(zn->key == ((knot_zone_t *)zn->value)->apex->owner);
+//		name = knot_dname_to_str((knot_dname_t *)zn->key);
+//		dbg_zonedb("    zone name: %s\n", name);
+//		free(name);
+
+//		zn = skip_next(zn);
+//	}
+
+//	zn = skip_first((*db)->zones);
+//);
+
+//	while (zn != NULL) {
+//		zone = (knot_zone_t *)zn->value;
+//		assert(zone != NULL);
+
+//		// remove the zone from the database
+//		skip_remove((*db)->zones, zn->key, NULL, NULL);
+//		// wait for all readers to finish
+//		synchronize_rcu;
+//		// destroy the zone
+//		knot_zone_deep_free(&zone, 0);
+
+//		zn = skip_first((*db)->zones);
+//	}
+
+//	assert(skip_is_empty((*db)->zones));
+
+//	skip_destroy_list(&(*db)->zones, NULL, NULL);
+	gen_tree_destroy(&((*db)->zone_tree), delete_zone_from_db, NULL);
+	assert((*db)->zone_tree == NULL);
+	free(*db);
+	*db = NULL;
+}
+
+/*----------------------------------------------------------------------------*/
+
diff --git a/src/libknot/zone/zonedb.h b/src/libknot/zone/zonedb.h
new file mode 100644
index 0000000..d5a4992
--- /dev/null
+++ b/src/libknot/zone/zonedb.h
@@ -0,0 +1,145 @@
+/*!
+ * \file zonedb.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * \brief Zone database structure and API for manipulating it.
+ *
+ * Zone database groups several zones and provides functions for finding
+ * suitable zone for a domain name, for searching in a particular zone, etc.
+ *
+ * \addtogroup libknot
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOT_ZONEDB_H_
+#define _KNOT_ZONEDB_H_
+
+#include "common/general-tree.h"
+#include "zone/zone.h"
+#include "zone/node.h"
+#include "dname.h"
+
+/*!
+ * \brief Zone database structure. Contains all zones managed by the server.
+ */
+struct knot_zonedb {
+	general_tree_t *zone_tree; /*!< AVL tree of zones. */
+	size_t zone_count;
+};
+
+typedef struct knot_zonedb knot_zonedb_t;
+
+/*----------------------------------------------------------------------------*/
+
+/*!
+ * \brief Allocates and initializes the zone database structure.
+ *
+ * \return Pointer to the created zone database structure or NULL if an error
+ *         occured.
+ */
+knot_zonedb_t *knot_zonedb_new();
+
+/*!
+ * \brief Adds new zone to the database.
+ *
+ * \param db Zone database to store the zone.
+ * \param zone Parsed zone.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_EZONEIN
+ */
+int knot_zonedb_add_zone(knot_zonedb_t *db, knot_zone_t *zone);
+
+/*!
+ * \brief Removes the given zone from the database if it exists.
+ *
+ * \note Assumes that the zone was adjusted using knot_zone_adjust_dnames().
+ *       If it was not, it may leak some memory due to checks used in
+ *       knot_rdata_deep_free().
+ *
+ * \param db Zone database to remove from.
+ * \param zone_name Name of the zone to be removed.
+ * \param destroy_zone Set to <> 0 if you do want the function to destroy the
+ *                     zone after removing from zone database. Set to 0
+ *                     otherwise.
+ *
+ * \retval KNOT_EOK
+ * \retval KNOT_ENOZONE
+ */
+knot_zone_t * knot_zonedb_remove_zone(knot_zonedb_t *db, 
+                                      const knot_dname_t *zone_name);
+
+//knot_zone_t *knot_zonedb_replace_zone(knot_zonedb_t *db,
+//                                          knot_zone_t *zone);
+
+/*!
+ * \brief Finds zone exactly matching the given zone name.
+ *
+ * \param db Zone database to search in.
+ * \param zone_name Domain name representing the zone name.
+ *
+ * \return Zone with \a zone_name being the owner of the zone apex or NULL if
+ *         not found.
+ */
+knot_zone_t *knot_zonedb_find_zone(const knot_zonedb_t *db,
+                                       const knot_dname_t *zone_name);
+
+
+/*!
+ * \brief Finds zone the given domain name should belong to.
+ *
+ * \param db Zone database to search in.
+ * \param dname Domain name to find zone for.
+ *
+ * \retval Zone in which the domain name should be present or NULL if no such
+ *         zone is found.
+ */
+const knot_zone_t *knot_zonedb_find_zone_for_name(knot_zonedb_t *db,
+                                                   const knot_dname_t *dname);
+
+knot_zone_contents_t *knot_zonedb_expire_zone(knot_zonedb_t *db,
+                                              const knot_dname_t *zone_name);
+
+size_t knot_zonedb_zone_count(const knot_zonedb_t *db);
+const knot_zone_t **knot_zonedb_zones(const knot_zonedb_t *db);
+
+/*!
+ * \brief Destroys and deallocates the zone database structure (but not the
+ *        zones within).
+ *
+ * \param db Zone database to be destroyed.
+ */
+void knot_zonedb_free(knot_zonedb_t **db);
+
+/*!
+ * \brief Destroys and deallocates the whole zone database including the zones.
+ *
+ * \note Assumes that the zone was adjusted using knot_zone_adjust_dnames().
+ *       If it was not, it may leak some memory due to checks used in
+ *       knot_rdata_deep_free().
+ *
+ * \param db Zone database to be destroyed.
+ */
+void knot_zonedb_deep_free(knot_zonedb_t **db);
+
+/*----------------------------------------------------------------------------*/
+
+#endif /* _KNOT_ZONEDB_H_ */
+
+/*! @} */
diff --git a/src/tests/README b/src/tests/README
new file mode 100644
index 0000000..2f299ad
--- /dev/null
+++ b/src/tests/README
@@ -0,0 +1,10 @@
+Unit testing
+------------
+
+Make assembles "unittest" binary with all of the planned tests included.
+So far it is accepting the same parameters as the "cutedns",
+but an own parameter format is being developed.
+
+Example:
+bin/unittest samples/example.com.zone
+
diff --git a/src/tests/common/acl_tests.c b/src/tests/common/acl_tests.c
new file mode 100644
index 0000000..b4232ac
--- /dev/null
+++ b/src/tests/common/acl_tests.c
@@ -0,0 +1,111 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/socket.h>
+
+#include "tests/common/acl_tests.h"
+#include "common/sockaddr.h"
+#include "common/acl.h"
+
+static int acl_tests_count(int argc, char *argv[]);
+static int acl_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api acl_tests_api = {
+	"ACL",             //! Unit name
+	&acl_tests_count,  //! Count scheduled tests
+	&acl_tests_run     //! Run scheduled tests
+};
+
+static int acl_tests_count(int argc, char *argv[])
+{
+	return 13;
+}
+
+static int acl_tests_run(int argc, char *argv[])
+{
+	// 1. Create an ACL
+	acl_t *acl = acl_new(ACL_DENY, "simple ACL");
+	ok(acl != 0, "acl: new");
+
+	// 2. Create IPv4 address
+	sockaddr_t test_v4;
+	int ret = sockaddr_set(&test_v4, AF_INET, "127.0.0.1", 12345);
+	ok(ret > 0, "acl: new IPv4 address");
+
+	// 3. Create IPv6 address
+	sockaddr_t test_v6;
+	ret = sockaddr_set(&test_v6, AF_INET6, "::1", 54321);
+	ok(ret > 0, "acl: new IPv6 address");
+
+	// 4. Create simple IPv4 rule
+	ret = acl_create(acl, &test_v4, ACL_ACCEPT);
+	ok(ret == ACL_ACCEPT, "acl: inserted IPv4 rule");
+
+	// 5. Create simple IPv6 rule
+	ret = acl_create(acl, &test_v6, ACL_ACCEPT);
+	ok(ret == ACL_ACCEPT, "acl: inserted IPv6 rule");
+
+	// 6. Create simple IPv4 'any port' rule
+	sockaddr_t test_v4a;
+	sockaddr_set(&test_v4a, AF_INET, "20.20.20.20", 0);
+	ret = acl_create(acl, &test_v4a, ACL_ACCEPT);
+	ok(ret == ACL_ACCEPT, "acl: inserted IPv4 'any port' rule");
+
+	// 7. Attempt to match unmatching address
+	sockaddr_t unmatch_v4;
+	sockaddr_set(&unmatch_v4, AF_INET, "10.10.10.10", 24424);
+	ret = acl_match(acl, &unmatch_v4);
+	ok(ret == ACL_DENY, "acl: matching non-existing address");
+
+	// 8. Attempt to match unmatching IPv6 address
+	sockaddr_t unmatch_v6;
+	sockaddr_set(&unmatch_v6, AF_INET6, "2001:db8::1428:57ab", 24424);
+	ret = acl_match(acl, &unmatch_v6);
+	ok(ret == ACL_DENY, "acl: matching non-existing IPv6 address");
+
+	// 9. Attempt to match matching address
+	ret = acl_match(acl, &test_v4);
+	ok(ret == ACL_ACCEPT, "acl: matching existing address");
+
+	// 10. Attempt to match matching address
+	ret = acl_match(acl, &test_v6);
+	ok(ret == ACL_ACCEPT, "acl: matching existing IPv6 address");
+
+	// 11. Attempt to match matching 'any port' address
+	sockaddr_t match_v4a;
+	sockaddr_set(&match_v4a, AF_INET, "20.20.20.20", 24424);
+	ret = acl_match(acl, &match_v4a);
+	ok(ret == ACL_ACCEPT, "acl: matching existing IPv4 'any port' address");
+
+	// 12. Attempt to match matching address without matching port
+	sockaddr_set(&unmatch_v4, AF_INET, "127.0.0.1", 54321);
+	ret = acl_match(acl, &unmatch_v4);
+	ok(ret == ACL_DENY, "acl: matching address without matching port");
+
+	// 13. Invalid parameters
+	lives_ok({
+		acl_delete(0);
+		acl_create(0, 0, ACL_ERROR);
+		acl_match(0, 0);
+		acl_truncate(0);
+		acl_name(0);
+	}, "acl: won't crash with NULL parameters");
+
+	// Return
+	return 0;
+}
diff --git a/src/tests/common/acl_tests.h b/src/tests/common/acl_tests.h
new file mode 100644
index 0000000..a928e2d
--- /dev/null
+++ b/src/tests/common/acl_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ACL_TESTS_H_
+#define _KNOTD_ACL_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api acl_tests_api;
+
+#endif /* _KNOTD_ACL_TESTS_H_ */
diff --git a/src/tests/common/da_tests.c b/src/tests/common/da_tests.c
new file mode 100644
index 0000000..627e8aa
--- /dev/null
+++ b/src/tests/common/da_tests.c
@@ -0,0 +1,330 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tests/common/da_tests.h"
+#include "common/dynamic-array.h"
+#include <unistd.h>
+#include <urcu.h>
+
+static int da_tests_count(int argc, char *argv[]);
+static int da_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api da_tests_api = {
+	"Dynamic array",
+	&da_tests_count,
+	&da_tests_run
+};
+
+/*
+ * Unit implementation.
+ */
+
+static const int DA_TEST_COUNT = 5;
+static const int RCU_THREADS   = 3;
+static const int DA_FRAGMENT = 10;
+static const int DA_DEF_SIZE = 1000;
+static const int DA_OPERATIONS = 1000;
+enum Operations {
+	DA_RESERVE = 0,
+	DA_OCCUPY  = 1,
+	DA_RELEASE = 2,
+	DA_OPCOUNT = 3
+};
+
+static int da_tests_count(int argc, char *argv[])
+{
+	return DA_TEST_COUNT;
+}
+
+static void do_something(int loops)
+{
+	int i;
+	int res = 1;
+
+	static const int LOOPS = 10000;
+
+	for (int j = 1; j <= LOOPS; ++j) {
+		for (i = 1; i <= loops; ++i) {
+			res *= i;
+		}
+	}
+}
+
+static void *test_rcu_routine(void *obj)
+{
+	rcu_register_thread();
+	rcu_read_lock();
+
+	do_something(1000);
+
+	rcu_read_unlock();
+	rcu_unregister_thread();
+
+	return NULL;
+}
+
+static int test_rcu_threads()
+{
+	// Create threads
+	pthread_t *threads = malloc(RCU_THREADS * sizeof(pthread_t));
+	for (int i = 0; i < RCU_THREADS; ++i) {
+		if (pthread_create(&threads[i], NULL, test_rcu_routine, NULL)) {
+			diag("rcu: failed to create thread %d", i);
+			free(threads);
+			return 0;
+		}
+	}
+
+	// Join threads
+	void *pret = NULL;
+	for (int i = 0; i < RCU_THREADS; ++i) {
+		if (pthread_join(threads[i], &pret)) {
+			diag("rcu: failed to join thread %d", i);
+			free(threads);
+			return 0;
+		}
+	}
+
+	synchronize_rcu();
+	free(threads);
+
+	return 1;
+}
+
+static int test_da_init(da_array_t *arr)
+{
+	return da_initialize(arr, DA_DEF_SIZE, sizeof(uint)) == 0;
+}
+
+static int test_da_random_op(da_array_t *arr)
+{
+	unsigned seed = (unsigned)time(0);
+	uint allocated = DA_DEF_SIZE;
+	uint size = 0;
+
+	for (int i = 0; i < DA_OPERATIONS; ++i) {
+		int r = rand_r(&seed) % DA_OPCOUNT;
+		int count = rand_r(&seed) % DA_FRAGMENT + 1;
+
+		switch (r) {
+
+			// Perform reserve operation
+		case DA_RESERVE:
+			if (da_reserve(arr, count) >= 0 &&
+			                size <= allocated) {
+				if ((allocated - size) < count) {
+					allocated *= 2;
+				}
+			} else {
+				diag("dynamic-array: da_reserve(%p, %d) failed"
+				     " (size %d, alloc'd %d)", 
+				     arr, count, size, allocated);
+				return 0;
+			}
+			break;
+
+			// Perform occupy operation
+		case DA_OCCUPY:
+			if (da_occupy(arr, count) == 0) {
+				uint *items = (uint *) da_get_items(arr);
+				for (int j = 0; j < da_get_count(arr); ++j) {
+					items[j] = rand_r(&seed);
+				}
+				if (size <= allocated && 
+				    (allocated - size) >= count) {
+					size += count;
+				} else {
+					return 0;
+				}
+			} else {
+				diag("dynamic-array: da_occupy(%p, %d) failed"
+				     " (size %d, alloc'd %d)",
+				     arr, count, size, allocated);
+				return 0;
+			}
+			break;
+
+			// Perform release operation
+		case DA_RELEASE:
+			if (arr->count > 0) {
+				count = (rand_r(&seed) % DA_FRAGMENT) % arr->count;
+				da_release(arr, count);
+
+				if (size <= allocated && size >= count) {
+					size -= count;
+				} else {
+					return 0;
+				}
+			}
+			break;
+
+		default:
+			break;
+		}
+
+		// Check allocated / size
+		if (allocated != arr->allocated || size != arr->count) {
+			diag("dynamic-array: allocated memory %d (expected %d)"
+			     " size %d (expected %d) mismatch",
+			     arr->allocated, allocated, arr->count, size);
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+void *test_da_read(void *obj)
+{
+	rcu_register_thread();
+	rcu_read_lock();
+
+	unsigned seed = (unsigned)time(0);
+	da_array_t *arr = (da_array_t *) obj;
+	int index = rand_r(&seed) % da_get_count(arr);
+
+	note("  dynamic-array: read thread");
+	note("    read thread: saving pointer to %d. item", index);
+	uint *item = &((uint *) da_get_items(arr))[index];
+	note("    read thread: before: pointer: %p item: %u", item, *item);
+
+	do_something(100000);
+
+	note("    read thread after: pointer: %p item: %u", item, *item);
+	rcu_read_unlock();
+	note("    read thread unlocked: pointer: %p item: %u", item, *item);
+
+	do_something(10000);
+
+	note("    read thread: now the item should be deallocated");
+	//note("    read thread: pointer: %p item: %u", item, *item);
+
+	rcu_unregister_thread();
+
+	return NULL;
+}
+
+static int test_da_resize_holding(da_array_t *arr)
+{
+	int ret = 1;
+	rcu_register_thread();
+	pthread_t reader;
+
+	// Create thread for reading
+	note("dynamic-array: creating read threads");
+	if (pthread_create(&reader, NULL, test_da_read, (void *)arr)) {
+		diag("dynamic-array: failed to create reading thread",
+		     __func__);
+		rcu_unregister_thread();
+		return 0;
+	}
+
+	// Wait some time, so the other thread gets the item for reading
+	do_something(5000);
+
+	// Force resize
+	note("  dynamic-array: array resized");
+	if (da_reserve(arr, arr->allocated - arr->count + 1) == -1) {
+		diag("dynamic-array: da_reserve(%p, %d) failed", arr,
+		     arr->allocated - arr->count + 1);
+		ret = 0;
+	}
+
+	//Wait for the thread to finish
+	void *pret = NULL;
+	if (pthread_join(reader, &pret)) {
+		diag("dynamic-array: failed to join reading thread",
+		     __func__);
+		ret = 0;
+	}
+
+	rcu_unregister_thread();
+	return ret;
+}
+
+static int test_da_resize(da_array_t *arr)
+{
+	unsigned seed = (unsigned)time(0);
+	int orig_count = da_get_count(arr);
+	note("dynamic-array: allocated: %d, items: %d", arr->allocated,
+	     orig_count);
+	// store the items currently in the array
+	int *items = (int *)malloc(orig_count * sizeof(int));
+	for (int i = 0; i < orig_count; ++i) {
+		items[i] = ((int *)da_get_items(arr))[i];
+	}
+
+	// force resize
+	int res = 0;
+	while ((res = da_reserve(arr, 10)) == 0) {
+		int i = da_get_count(arr);
+		da_occupy(arr, 10);
+		for (; i < da_get_count(arr); ++i) {
+			((int *)da_get_items(arr))[i] = rand_r(&seed);
+		}
+	}
+
+	if (res < 0) {
+		diag("dynamic-array: failed to reserve space");
+		return 0;
+	}
+
+	int errors = 0;
+	for (int i = 0; i < orig_count; ++i) {
+		if (items[i] != ((int *)da_get_items(arr))[i]) {
+			diag("dynamic-array: Wrong item on position %d."
+			     "Should be: %d, "
+			     "present value: %d", i, items[i],
+			     ((int *)da_get_items(arr))[i]);
+			++errors;
+		}
+	}
+
+	free(items);
+
+	return errors == 0;
+}
+
+static int da_tests_run(int argc, char *argv[])
+{
+	// Init
+	rcu_init();
+	da_array_t array;
+
+	// Test 1: test rcu
+	ok(test_rcu_threads(), "dynamic-array: rcu tests");
+
+	// Test 2: init
+	ok(test_da_init(&array), "dynamic-array: init");
+
+	// Test 3: reserve/occupy random operations
+	ok(test_da_random_op(&array),
+	   "dynamic-array: randomized reserve/occupy/release");
+
+	// Test 4: resizing array while holding an item
+	ok(test_da_resize_holding(&array),
+	   "dynamic-array: resize array while holding an item");
+
+	// Test 5: resize
+	ok(test_da_resize(&array), "dynamic-array: resize array");
+
+	// Cleanup
+	da_destroy(&array);
+	return 0;
+}
diff --git a/src/tests/common/da_tests.h b/src/tests/common/da_tests.h
new file mode 100644
index 0000000..d51b7be
--- /dev/null
+++ b/src/tests/common/da_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_DA_TESTS_H_
+#define _KNOTD_DA_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api da_tests_api;
+
+#endif /* _KNOTD_DA_TESTS_H_ */
diff --git a/src/tests/common/events_tests.c b/src/tests/common/events_tests.c
new file mode 100644
index 0000000..d7702fe
--- /dev/null
+++ b/src/tests/common/events_tests.c
@@ -0,0 +1,192 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/time.h>
+
+#include "tests/common/events_tests.h"
+#include "common/evqueue.h"
+#include "common/evsched.h"
+
+static int events_tests_count(int argc, char *argv[]);
+static int events_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api events_tests_api = {
+	"Event queue and scheduler",   //! Unit name
+	&events_tests_count,  //! Count scheduled tests
+	&events_tests_run     //! Run scheduled tests
+};
+
+void* term_thr(void *arg)
+{
+	evsched_t *s = (evsched_t *)arg;
+
+	/* Sleep for 100ms. */
+	struct timeval tv;
+	tv.tv_sec = 0;
+	tv.tv_usec = 100 * 1000; // 100ms
+	select(0, 0, 0, 0, &tv);
+
+	/* Issue termination event. */
+	evsched_schedule_term(s, 0);
+	return 0;
+}
+
+static int events_tests_count(int argc, char *argv[])
+{
+	return 9 + 11;
+}
+
+static int events_tests_run(int argc, char *argv[])
+{
+	/*
+	 * Event queue tests.
+	 */
+
+	// 1. Construct an event queue
+	evqueue_t *q = evqueue_new();
+	ok(q != 0, "evqueue: new");
+
+	// 2. Send integer through event queue
+	int ret = 0;
+	uint8_t sent = 0xaf, rcvd = 0;
+	ret = evqueue_write(q, &sent, sizeof(uint8_t));
+	ok(ret == sizeof(uint8_t), "evqueue: send byte through");
+
+	// 3. Receive byte from event queue
+	ret = evqueue_read(q, &rcvd, sizeof(uint8_t));
+	ok(ret == sizeof(uint8_t), "evqueue: received byte");
+
+	// 4. Received match
+	ok(sent == rcvd, "evqueue: received byte match");
+
+	// 5. Sending event
+	event_t ev, rev;
+	memset(&ev, 0, sizeof(event_t));
+	memset(&rev, 0, sizeof(event_t));
+	ev.type = 0xfa11;
+	ev.data = (void*)0xceed;
+	ret = evqueue_add(q, &ev);
+	ok(ret == 0, "evqueue: sent event to queue");
+
+	// 6. Poll for new events
+	struct timespec ts;
+	ts.tv_sec = 0;
+	ts.tv_nsec = 100 * 1000 * 1000; // 100ms
+	ret = evqueue_poll(q, &ts, 0);
+	ok(ret > 0, "evqueue: polling queue for events");
+
+	// 7. Compare received event
+	ret = evqueue_get(q, &rev);
+	/* Compare useful data, as event owner was changed in evqueue_get(). */
+	if (ev.type == rev.type && ev.data == rev.data) {
+		ret = 0;
+	}
+	ok(ret == 0, "evqueue: received event matches sent");
+
+	// 8. Invalid parameters
+	lives_ok({
+		 evqueue_free(0);
+		 evqueue_poll(0,0,0);
+		 evqueue_read(0, 0, 0);
+		 evqueue_write(0, 0, 0);
+		 evqueue_read(0, 0, 0);
+		 evqueue_get(0, 0);
+		 evqueue_add(0, 0);
+	}, "evqueue: won't crash with NULL parameters");
+
+	// 9. Free event queue
+	lives_ok({evqueue_free(&q);}, "evqueue: delete");
+
+	/*
+	 * Event scheduler tests.
+	 */
+
+	// 1. Construct event scheduler
+	event_t *e = 0;
+	evsched_t *s = evsched_new();
+	ok(s != 0, "evsched: new");
+
+	// 2. Schedule event to happen after N ms
+	int msecs = 50;
+	struct timeval st, rt;
+	gettimeofday(&st, 0);
+	e = evsched_schedule_cb(s, 0, (void*)0xcafe, msecs);
+	ok(e != 0, "evsched: scheduled empty event after %dms", msecs);
+
+	// 3. Wait for next event
+	e = evsched_next(s);
+	evsched_event_finished(s);
+	gettimeofday(&rt, 0);
+	ok(e != 0, "evsched: received valid event");
+
+	// 4. Check receive time
+	double passed = (rt.tv_sec - st.tv_sec) * 1000;
+	passed += (rt.tv_usec - st.tv_usec) / 1000;
+	double margin = msecs * 0.2;
+	double lb = msecs - margin, ub = msecs + margin;
+	int in_bounds = (passed >= lb) && (passed <= ub);
+	ok(in_bounds, "evsched: receive time %.1lfms is in <%.1lf,%.1lf>",
+	   passed, lb, ub);
+
+	// 5. Check data
+	ok(e->data == (void*)0xcafe, "evsched: received data is valid");
+
+	// 6. Delete event
+	lives_ok({evsched_event_free(s, e);}, "evsched: deleted event");
+
+	// 7. Insert and immediately cancel an event
+	e = evsched_schedule_cb(s, 0, (void*)0xdead, 1000);
+	ret = evsched_cancel(s, e);
+	ok(ret == 0, "evsched: inserted and cancelled an event");
+	if (e) {
+		evsched_event_free(s, e);
+	}
+
+	// 8. Start listener thread and block
+	pthread_t t;
+	pthread_create(&t, 0, term_thr, s);
+	e = evsched_next(s);
+	evsched_event_finished(s);
+	ok(e != 0, "evsched: received termination event");
+
+	// 9. Termination event is valid
+	ok(e->type == EVSCHED_TERM, "evsched: termination event is valid");
+	evsched_event_free(s, e);
+	pthread_join(t, 0);
+
+	// 10. Invalid parameters
+	lives_ok({
+		evsched_delete(0);
+		evsched_event_new(0, 0);
+		evsched_event_free(0, 0);
+		evsched_next(0);
+		evsched_schedule(0, 0, 0);
+		evsched_schedule_cb(0, 0, 0, 0);
+		evsched_schedule_term(0, 0);
+		evsched_cancel(0, 0);
+
+	}, "evsched: won't crash with NULL parameters");
+
+	// 11. Delete event scheduler
+	lives_ok({evsched_delete(&s);}, "evsched: delete");
+
+
+	return 0;
+}
diff --git a/src/tests/common/events_tests.h b/src/tests/common/events_tests.h
new file mode 100644
index 0000000..b54b6da
--- /dev/null
+++ b/src/tests/common/events_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD__EVENTS_TESTS_H_
+#define _KNOTD__EVENTS_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api events_tests_api;
+
+#endif /* _KNOTD__EVENTS_TESTS_H_ */
diff --git a/src/tests/common/fdset_tests.c b/src/tests/common/fdset_tests.c
new file mode 100644
index 0000000..7dd95a1
--- /dev/null
+++ b/src/tests/common/fdset_tests.c
@@ -0,0 +1,177 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/time.h>
+#include <pthread.h>
+
+#include "tests/common/fdset_tests.h"
+#include "common/fdset.h"
+
+#define WRITE_PATTERN ((char) 0xde)
+#define WRITE_PATTERN_LEN sizeof(char)
+
+
+/* Subtract the `struct timeval' values X and Y,
+   storing the result in RESULT.
+   Return 1 if the difference is negative, otherwise 0.
+   Copyright http://www.delorie.com/gnu/docs/glibc/libc_428.html
+*/
+static int timeval_subtract (struct timeval *result, struct timeval *x,  struct timeval* y)
+{
+  /* Perform the carry for the later subtraction by updating y. */
+  if (x->tv_usec < y->tv_usec) {
+    int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
+    y->tv_usec -= 1000000 * nsec;
+    y->tv_sec += nsec;
+  }
+  if (x->tv_usec - y->tv_usec > 1000000) {
+    int nsec = (x->tv_usec - y->tv_usec) / 1000000;
+    y->tv_usec += 1000000 * nsec;
+    y->tv_sec -= nsec;
+  }
+
+  /* Compute the time remaining to wait.
+     tv_usec is certainly positive. */
+  result->tv_sec = x->tv_sec - y->tv_sec;
+  result->tv_usec = x->tv_usec - y->tv_usec;
+
+  /* Return 1 if result is negative. */
+  return x->tv_sec < y->tv_sec;
+}
+
+static size_t timeval_diff(struct timeval *from, struct timeval *to) {
+	struct timeval res;
+	timeval_subtract(&res, to, from);
+	return res.tv_sec*1000 + res.tv_usec/1000;
+}
+
+static int fdset_tests_count(int argc, char *argv[]);
+static int fdset_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api fdset_tests_api = {
+	"Native fdset poll wrapper",   //! Unit name
+	&fdset_tests_count,  //! Count scheduled tests
+	&fdset_tests_run     //! Run scheduled tests
+};
+
+void* thr_action(void *arg)
+{
+	int *fd = (int *)arg;
+
+	/* Sleep for 100ms. */
+	struct timeval tv;
+	tv.tv_sec = 0;
+	tv.tv_usec = 100 * 1000; // 100ms
+	select(0, 0, 0, 0, &tv);
+
+	/* Write pattern. */
+	char pattern = WRITE_PATTERN;
+	int ret = write(*fd, &pattern, WRITE_PATTERN_LEN);
+	ret = ret; /* Use variable. */
+
+	return 0;
+}
+
+static int fdset_tests_count(int argc, char *argv[])
+{
+	return 11;
+}
+
+static int fdset_tests_run(int argc, char *argv[])
+{
+	diag("fdset: implements '%s'", fdset_method());
+
+	/* 1. Create fdset. */
+	fdset_t *set = fdset_new();
+	ok(set != 0, "fdset: new");
+
+	/* 2. Create pipe. */
+	int fds[2], tmpfds[2];
+	int ret = pipe(fds);
+	ok(ret >= 0, "fdset: pipe() works");
+	ret = pipe(tmpfds);
+
+	/* 3. Add fd to set. */
+	ret = fdset_add(set, fds[0], OS_EV_READ);
+	ok(ret == 0, "fdset: add to set works");
+	fdset_add(set, tmpfds[0], OS_EV_READ);
+
+	/* Schedule write. */
+	struct timeval ts, te;
+	gettimeofday(&ts, 0);
+	pthread_t t;
+	pthread_create(&t, 0, thr_action, &fds[1]);
+
+	/* 4. Watch fdset. */
+	ret = fdset_wait(set);
+	gettimeofday(&te, 0);
+	size_t diff = timeval_diff(&ts, &te);
+
+	ok(ret > 0 && diff > 99 && diff < 10000,
+	   "fdset: poll returned events in %zu ms", diff);
+
+	/* 5. Prepare event set. */
+	fdset_it_t it;
+	ret = fdset_begin(set, &it);
+	ok(ret == 0 && it.fd == fds[0], "fdset: begin is valid, ret=%d", ret);
+
+	/* 6. Receive data. */
+	char buf = 0x00;
+	ret = read(it.fd, &buf, WRITE_PATTERN_LEN);
+	ok(ret >= 0 && buf == WRITE_PATTERN, "fdset: contains valid data, fd=%d", it.fd);
+
+	/* 7. Iterate event set. */
+	ret = fdset_next(set, &it);
+	ok(ret < 0, "fdset: boundary check works");
+
+	/* 8. Remove from event set. */
+	ret = fdset_remove(set, fds[0]);
+	ok(ret == 0, "fdset: remove from fdset works");
+	close(fds[0]);
+	close(fds[1]);
+	ret = fdset_remove(set, tmpfds[0]);
+	close(tmpfds[1]);
+	close(tmpfds[1]);
+
+	/* 9. Poll empty fdset. */
+	ret = fdset_wait(set);
+	ok(ret <= 0, "fdset: polling empty fdset returns -1 (ret=%d)", ret);
+
+	/* 10. Crash test. */
+	lives_ok({
+		 fdset_destroy(0);
+		 fdset_add(0, -1, 0);
+		 fdset_remove(0, -1);
+		 fdset_wait(0);
+		 fdset_begin(0, 0);
+		 fdset_end(0, 0);
+		 fdset_next(0, 0);
+		 fdset_method();
+	}, "fdset: crash test successful");
+
+	/* 11. Destroy fdset. */
+	ret = fdset_destroy(set);
+	ok(ret == 0, "fdset: destroyed");
+
+	/* Cleanup. */
+	pthread_join(t, 0);
+
+	return 0;
+}
diff --git a/src/tests/common/fdset_tests.h b/src/tests/common/fdset_tests.h
new file mode 100644
index 0000000..d29e1a9
--- /dev/null
+++ b/src/tests/common/fdset_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_FDSET_TESTS_H_
+#define _KNOTD_FDSET_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api fdset_tests_api;
+
+#endif /* _KNOTD_FDSET_TESTS_H_ */
diff --git a/src/tests/common/skiplist_tests.c b/src/tests/common/skiplist_tests.c
new file mode 100644
index 0000000..4fe99ec
--- /dev/null
+++ b/src/tests/common/skiplist_tests.c
@@ -0,0 +1,198 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <time.h>
+
+#include "tests/common/skiplist_tests.h"
+#include "common/skip-list.h"
+
+static int skiplist_tests_count(int argc, char *argv[]);
+static int skiplist_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api skiplist_tests_api = {
+	"Skip list",
+	&skiplist_tests_count,
+	&skiplist_tests_run
+};
+
+/*
+ * Unit implementation.
+ */
+
+static const int SKIPLIST_TEST_COUNT = 5;
+
+static int skiplist_tests_count(int argc, char *argv[])
+{
+	return SKIPLIST_TEST_COUNT;
+}
+
+/* Comparing and merging limited to int keys used in test.
+ */
+int test_skip_compare_keys(void *key1, void *key2)
+{
+	return ((long)key1 < (long)key2) ?
+	        -1 : (((long)key1 > (long)key2) ? 1 : 0);
+}
+
+int test_skip_merge_values(void **lvalue, void **rvalue)
+{
+	(*lvalue) = (void *)((long)(*lvalue) + (long)(*rvalue));
+	return 0;
+}
+
+int test_skiplist_create(skip_list_t **list)
+{
+	*list = skip_create_list(test_skip_compare_keys);
+	return *list != NULL;
+}
+
+int test_skiplist_fill(skip_list_t *list, long *uitems, int loops)
+{
+	int uitem_count = 0;
+	for (int i = 0; i < loops; ++i) {
+		long key = rand() % 100 + 1;
+		long value = rand() % 100 + 1;
+		int res = skip_insert(list, (void *)key, (void *)value,
+		                      test_skip_merge_values);
+		switch (res) {
+		case -2:
+			diag("skiplist: merging failed");
+			return 0;
+			break;
+		case -1:
+			diag("skiplist: insert failed");
+			return 0;
+			break;
+		case 0:
+			uitems[uitem_count++] = key;
+			break;
+		default:
+			break;
+		}
+	}
+
+	return uitem_count;
+}
+
+int test_skiplist_lookup_seq(skip_list_t *list, long *uitems, int uitems_count)
+{
+	int errors = 0;
+
+	// Sequential lookup
+	for (int i = 0; i < uitems_count; ++i) {
+		void *found = skip_find(list, (void *) uitems[i]);
+		if (found == NULL) {
+			diag("skiplist: sequential "
+			     "lookup failed, key: %d", uitems[i]);
+			++errors;
+		}
+	}
+
+	if (errors) {
+		diag("skiplist: sequential lookup: %d found %d missed,"
+		     " %.2f%% success rate",
+		     uitems_count - errors, errors,
+		     (uitems_count - errors) / (float) uitems_count * 100.0);
+	}
+
+	return errors == 0;
+}
+
+int test_skiplist_lookup_rand(skip_list_t *list, long *uitems, int uitems_count)
+{
+	int errors = 0;
+	srand((unsigned)time(NULL));
+
+	// Random lookup
+	for (int i = 0; i < uitems_count; ++i) {
+		long key = rand() % uitems_count + 1;
+		void *found = skip_find(list, (void *) key);
+		if (found == NULL) {
+			diag("skiplist: random lookup"
+			     "failed, key: %d", uitems[i]);
+			++errors;
+		}
+	}
+
+	if (errors) {
+		diag("skiplist: sequential lookup: "
+		     "%d found %d missed, %.2f%% success rate",
+		     uitems_count - errors, errors,
+		     (uitems_count - errors) / (float) uitems_count * 100.0);
+	}
+	return errors == 0;
+}
+
+
+int test_skiplist_remove(skip_list_t *list, long *uitems, int uitems_count)
+{
+	int errors = 0;
+
+	// delete items
+	for (int i = 0; i < uitems_count; ++i) {
+		int res = skip_remove(list, (void *) uitems[i], NULL, NULL);
+		switch (res) {
+		case 0:
+			break;
+		default:
+			++errors;
+			break;
+		}
+	}
+
+	if (errors) {
+		diag("skiplist: sequential lookup: %d found %d missed, "
+		      "%.2f%% success rate",
+		     uitems_count - errors, errors,
+		     (uitems_count - errors) / (float) uitems_count * 100.0);
+	}
+	return errors == 0;
+}
+
+static int skiplist_tests_run(int argc, char *argv[])
+{
+	const int loops = 100;
+	int uitems_count = 0;
+	long *uitems = malloc(loops * sizeof(long));
+	skip_list_t *list = 0;
+
+	// Test 1: create
+	ok(test_skiplist_create(&list), "skiplist: create");
+
+	// Test 2: fill
+	ok(uitems_count = test_skiplist_fill(list, uitems, loops),
+					     "skiplist: fill");
+
+	// Test 3: sequential lookup
+	ok(test_skiplist_lookup_seq(list, uitems, uitems_count),
+				    "skiplist: sequential lookup");
+
+	// Test 4: sequential lookup
+	ok(test_skiplist_lookup_seq(list, uitems, uitems_count),
+				    "skiplist: random lookup lookup");
+
+	// Test 5: remove items
+	ok(test_skiplist_remove(list, uitems, uitems_count),
+				"skiplist: random lookup lookup");
+
+	// Cleanup
+	skip_destroy_list(&list, NULL, NULL);
+	free(uitems);
+	return 0;
+}
diff --git a/src/tests/common/skiplist_tests.h b/src/tests/common/skiplist_tests.h
new file mode 100644
index 0000000..ff91706
--- /dev/null
+++ b/src/tests/common/skiplist_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_SKIPLIST_TESTS_H_
+#define _KNOTD_SKIPLIST_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api skiplist_tests_api;
+
+#endif /* _KNOTD_SKIPLIST_TESTS_H_ */
diff --git a/src/tests/common/slab_tests.c b/src/tests/common/slab_tests.c
new file mode 100644
index 0000000..f362ca0
--- /dev/null
+++ b/src/tests/common/slab_tests.c
@@ -0,0 +1,141 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdbool.h>
+
+#include "tests/common/slab_tests.h"
+#include "common/slab/slab.h"
+#include "knot/common.h"
+
+/* Explicitly ask for symbols,
+ * as the constructor and destructor
+ * aren't created for test modules.
+ */
+extern void slab_init();
+extern void slab_deinit();
+
+static int slab_tests_count(int argc, char *argv[]);
+static int slab_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api slab_tests_api = {
+	"SLAB allocator",   //! Unit name
+	&slab_tests_count,  //! Count scheduled tests
+	&slab_tests_run     //! Run scheduled tests
+};
+
+static int slab_tests_count(int argc, char *argv[])
+{
+	return 7;
+}
+
+static int slab_tests_run(int argc, char *argv[])
+{
+	// 1. Create slab cache
+	srand(time(0));
+	const unsigned pattern = 0xdeadbeef;
+	slab_cache_t cache;
+	int ret = slab_cache_init(&cache, sizeof(int));
+	ok(ret == 0, "slab: created empty cache");
+
+	// 2. Couple alloc/free
+	bool valid_free = true;
+	lives_ok({
+	for(int i = 0; i < 100; ++i) {
+		int* data = (int*)slab_cache_alloc(&cache);
+		*data = pattern;
+		slab_free(data);
+		if (*data == pattern)
+			valid_free = false;
+	}
+	}, "slab: couple alloc/free");
+
+	// 5. Verify freed block
+	ok(valid_free, "slab: freed memory is correctly invalidated");
+
+	// 4. Reap memory
+	slab_t* slab = cache.slabs_free;
+	int free_count = 0;
+	while (slab) {
+		slab_t* next = slab->next;
+		if (slab_isempty(slab)) {
+			++free_count;
+		}
+		slab = next;
+	}
+
+	int reaped = slab_cache_reap(&cache);
+	cmp_ok(reaped, "==", free_count, "slab: cache reaping works");
+
+	// Stress cache
+	int alloc_count = 73521;
+	void** ptrs = alloca(alloc_count * sizeof(void*));
+	int ptrs_i = 0;
+	for(int i = 0; i < alloc_count; ++i) {
+		double roll = rand() / (double) RAND_MAX;
+		if ((ptrs_i == 0) || (roll < 0.6)) {
+			int id = ptrs_i++;
+			ptrs[id] = slab_cache_alloc(&cache);
+			if (ptrs[id] == 0) {
+				ptrs_i--;
+			} else {
+				int* data = (int*)ptrs[id];
+				*data = pattern;
+			}
+		} else {
+			slab_free(ptrs[--ptrs_i]);
+		}
+	}
+
+	// 5. Delete cache
+	slab_cache_destroy(&cache);
+	ok(cache.bufsize == 0, "slab: freed cache");
+
+	// 6. Greate GP allocator
+	slab_alloc_t alloc;
+	ret = slab_alloc_init(&alloc);
+	ok(ret == 0, "slab: created GP allocator");
+
+	// 7. Stress allocator
+	unsigned ncount = 0;
+	ptrs_i = 0;
+	for(int i = 0; i < alloc_count; ++i) {
+		double roll = rand() / (double) RAND_MAX;
+		size_t bsize = roll * 2048;
+		bsize = MAX(bsize, 8);
+		if ((ptrs_i == 0) || (roll < 0.6)) {
+			void* m = slab_alloc_alloc(&alloc, bsize);
+			if (m == 0) {
+				++ncount;
+			} else {
+				ptrs[ptrs_i++] = m;
+			}
+		} else {
+			slab_free(ptrs[--ptrs_i]);
+		}
+	}
+
+	cmp_ok(ncount, "==", 0, "slab: GP allocator alloc/free working");
+
+	// 7. Destroy allocator
+	slab_alloc_destroy(&alloc);
+
+	return 0;
+}
diff --git a/src/tests/common/slab_tests.h b/src/tests/common/slab_tests.h
new file mode 100644
index 0000000..4d45fb8
--- /dev/null
+++ b/src/tests/common/slab_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_SLAB_TESTS_H_
+#define _KNOTD_SLAB_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api slab_tests_api;
+
+#endif /* _KNOTD_SLAB_TESTS_H_ */
diff --git a/src/tests/files/sample_conf b/src/tests/files/sample_conf
new file mode 100644
index 0000000..6cd9e50
--- /dev/null
+++ b/src/tests/files/sample_conf
@@ -0,0 +1,59 @@
+# configuration file will follow bird (and juniper) type of configuration file
+# i.e. curly brackets will be used;
+
+# what to do with };
+# a) ignore ; if it follows }
+
+system {
+
+  identity "I have no mouth and must scream";
+  version "Infinitesimal";
+  storage "/var/run/knot/";
+}
+
+keys {
+  key0.example.net hmac-md5 "Wg=="; # key special for one remote
+  key1.example.net hmac-md5 "==gW"; # implicit key for whole zone
+}
+
+remotes {
+  remote0 { address 1.2.3.4; }
+}
+
+zones {
+  example.net {
+    file "/var/lib/knot/example.net";
+    xfr-out remote0;
+  }
+}
+
+interfaces {
+  interface0 {
+    address 10.10.1.1;
+    port 53531;
+  }
+
+  interface1 {
+    address ::0;
+    # port 53;
+  }
+}
+
+log {
+  syslog {
+    any notice, warning, error;
+    zone all;
+  }
+
+  file "/var/log/knot/server.err" {
+    server error;
+  }
+
+  stderr {
+    any warning, error;
+  }
+
+  stdout {
+    any info;
+  }
+}
diff --git a/src/tests/knot/conf_tests.c b/src/tests/knot/conf_tests.c
new file mode 100644
index 0000000..61520ea
--- /dev/null
+++ b/src/tests/knot/conf_tests.c
@@ -0,0 +1,141 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+
+#include "tests/knot/conf_tests.h"
+#include "knot/conf/conf.h"
+
+/* Resources. */
+#include "tests/sample_conf.rc"
+
+static int conf_tests_count(int argc, char *argv[]);
+static int conf_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api conf_tests_api = {
+	"Configuration parser", //! Unit name
+	&conf_tests_count,      //! Count scheduled tests
+	&conf_tests_run         //! Run scheduled tests
+};
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int conf_tests_count(int argc, char *argv[])
+{
+	return 21;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int conf_tests_run(int argc, char *argv[])
+{
+
+	// Test 1: Allocate new config
+	const char *config_fn = "rc:/sample_conf";
+	conf_t *conf = conf_new(config_fn);
+	ok(conf != 0, "config_new()");
+
+	// Test 2: Parse config
+	int ret = conf_parse_str(conf, sample_conf_rc);
+	ok(ret == 0, "parsing configuration file %s", config_fn);
+	skip(ret != 0, conf_tests_count(argc, argv) - 2);
+	{
+
+	// Test 3: Test server version (0-level depth)
+	is(conf->version, "Infinitesimal", "server version loaded ok");
+
+	// Test 4: Test interfaces (1-level depth)
+	ok(!EMPTY_LIST(conf->ifaces), "configured interfaces exist");
+
+	// Test 5,6,7,8: Interfaces content (2-level depth)
+	struct node *n = HEAD(conf->ifaces);
+	conf_iface_t *iface = (conf_iface_t*)n;
+	is(iface->address, "10.10.1.1", "interface0 address check");
+	cmp_ok(iface->port, "==", 53531, "interface0 port check");
+	n = n->next;
+	iface = (conf_iface_t*)n;
+	is(iface->address, "::0", "interface1 address check");
+	cmp_ok(iface->port, "==", 53, "interface1 default port check");
+
+	// Test 9,10: Check server key
+	if(conf->key_count <= 0) {
+		ok(0, "TSIG key algorithm check - NO KEY FOUND");
+		ok(0, "TSIG key secret check - NO KEY FOUND");
+	} else {
+		knot_key_t *k = &((conf_key_t *)HEAD(conf->keys))->k;
+		cmp_ok(k->algorithm, "==", KNOT_TSIG_ALG_HMAC_MD5,
+		       "TSIG key algorithm check");
+		is(k->secret, "Wg==", "TSIG key secret check");
+	}
+
+	// Test 11,12,13,14,15,16,17,18: Check logging facilities
+	cmp_ok(conf->logs_count, "==", 4, "log facilites count check");
+	n = HEAD(conf->logs);
+	ok(!EMPTY_LIST(conf->logs), "log facilities not empty");
+
+	conf_log_t *log = (conf_log_t*)n;
+	node *nm = HEAD(log->map);
+	conf_log_map_t *m = (conf_log_map_t*)nm;
+	cmp_ok(log->type, "==", LOGT_SYSLOG, "log0 is syslog");
+
+	skip(EMPTY_LIST(log->map), 5);
+	{
+	  cmp_ok(m->source, "==", LOG_ANY, "syslog first rule is ANY");
+	  int mask = LOG_MASK(LOG_NOTICE)|LOG_MASK(LOG_WARNING)|LOG_MASK(LOG_ERR);
+	  cmp_ok(m->prios, "==", mask, "syslog mask is equal");
+	  nm = nm->next;
+	  m = (conf_log_map_t*)nm;
+	  ok(m != 0, "syslog has more than 1 rule");
+	  skip(!m, 2);
+	  {
+	    cmp_ok(m->source, "==", LOG_ZONE, "syslog next rule is for zone");
+	    cmp_ok(m->prios, "==", 0xff, "rule for zone is: any level");
+	  }
+	  endskip;
+	} endskip;
+
+	// Test 19,20: File facility checks
+	n = n->next;
+	log = (conf_log_t*)n;
+	ok(n != 0, "log has next facility");
+	skip(!n, 1);
+	{
+	  is(log->file, "/var/log/knot/server.err", "log file matches");
+	} endskip;
+	
+	// Test 21: Load key dname
+	const char *sample_str = "key0.example.net";
+	knot_dname_t *sample = knot_dname_new_from_str(sample_str,
+	                                               strlen(sample_str), 0);
+	if (conf->key_count > 0) {
+		knot_key_t *k = &((conf_key_t *)HEAD(conf->keys))->k;
+		ok(knot_dname_compare(sample, k->name) == 0,
+		   "TSIG key dname check");
+	} else {
+		ok(0, "TSIG key dname check - NO KEY FOUND");
+	}
+	knot_dname_free(&sample);
+	
+	} endskip;
+
+	// Deallocating config
+	conf_free(conf);
+
+	return 0;
+}
diff --git a/src/tests/knot/conf_tests.h b/src/tests/knot/conf_tests.h
new file mode 100644
index 0000000..dfd2fd7
--- /dev/null
+++ b/src/tests/knot/conf_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_CONF_TESTS_H_
+#define _KNOTD_CONF_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api conf_tests_api;
+
+#endif /* _KNOTD_CONF_TESTS_H_ */
diff --git a/src/tests/knot/dthreads_tests.c b/src/tests/knot/dthreads_tests.c
new file mode 100644
index 0000000..d95fbed
--- /dev/null
+++ b/src/tests/knot/dthreads_tests.c
@@ -0,0 +1,392 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <pthread.h>
+#include <sched.h>
+#include <sys/select.h>
+#include <signal.h>
+
+#include "tests/knot/dthreads_tests.h"
+#include "knot/server/dthreads.h"
+
+static int dt_tests_count(int argc, char *argv[]);
+static int dt_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api dthreads_tests_api = {
+	"DThreads",
+	&dt_tests_count,
+	&dt_tests_run
+};
+
+/*
+ *  Unit implementation.
+ */
+static const int DT_TEST_COUNT = 23;
+
+/* Unit runnable data. */
+static pthread_mutex_t _runnable_mx;
+static volatile int _runnable_i = 0;
+static const int _runnable_cycles = 10000;
+
+/*! \brief Unit runnable. */
+int runnable(struct dthread_t *thread)
+{
+	for (int i = 0; i < _runnable_cycles; ++i) {
+
+		// Increase counter
+		pthread_mutex_lock(&_runnable_mx);
+		++_runnable_i;
+		pthread_mutex_unlock(&_runnable_mx);
+
+		// Cancellation point
+		if (dt_is_cancelled(thread)) {
+			break;
+		}
+
+		// Yield
+		sched_yield();
+	}
+
+	return 0;
+}
+
+/*! \brief Unit blocking runnable. */
+int runnable_simio(struct dthread_t *thread)
+{
+	// Infinite blocking, must be interrupted
+	select(0, 0, 0, 0, 0);
+	return 0;
+}
+
+/*! \brief Create unit. */
+static inline dt_unit_t *dt_test_create(int size)
+{
+	return dt_create(size);
+}
+
+/*! \brief Assign a task. */
+static inline int dt_test_single(dt_unit_t *unit)
+{
+	return dt_repurpose(unit->threads[0], &runnable, NULL) == 0;
+}
+
+/*! \brief Assign task to all unit threads. */
+static inline int dt_test_coherent(dt_unit_t *unit)
+{
+	int ret = 0;
+	for (int i = 0; i < unit->size; ++i) {
+		ret += dt_repurpose(unit->threads[i], &runnable, NULL);
+	}
+
+	return ret == 0;
+}
+
+/*! \brief Repurpose single thread. */
+static inline int dt_test_repurpose(dt_unit_t *unit, int id)
+{
+	return dt_repurpose(unit->threads[id], &runnable_simio, NULL) == 0;
+}
+
+/*! \brief Cancel single thread. */
+static inline int dt_test_cancel(dt_unit_t *unit, int id)
+{
+	return dt_cancel(unit->threads[id]) == 0;
+}
+
+/*! \brief Reanimate dead threads. */
+static inline int dt_test_reanimate(dt_unit_t *unit)
+{
+	// Compact all threads
+	int ret = 0;
+	ret += dt_compact(unit);
+
+	// Remove purpose from all
+	for (int i = 0; i < unit->size; ++i) {
+		ret += dt_repurpose(unit->threads[i], 0, 0);
+	}
+
+	// Set single thread to purpose
+	ret += dt_repurpose(unit->threads[0], &runnable, 0);
+
+	// Restart
+	_runnable_i = 0;
+	ret += dt_start(unit);
+
+	// Wait for finish
+	ret += dt_join(unit);
+
+	// Verify
+	int expected = 1 * _runnable_cycles;
+	if (_runnable_i != expected) {
+		return 0;
+	}
+
+	// Check return codes
+	return ret == 0;
+}
+
+/*! \brief Resize unit. */
+static inline int dt_test_resize(dt_unit_t *unit, int size)
+{
+	// Resize
+	int ret = 0;
+	ret = dt_resize(unit, size);
+	if (ret < 0) {
+		return 0;
+	}
+
+	// Check outcome
+	if (unit->size != size) {
+		return 0;
+	}
+
+	// Repurpose all
+	_runnable_i = 0;
+	for (int i = 0; i < size; ++i) {
+		ret += dt_repurpose(unit->threads[i], &runnable, 0);
+		ret += dt_start_id(unit->threads[i]);
+	}
+
+	// Wait for finish
+	ret += dt_join(unit);
+
+	// Verify
+	int expected = size * _runnable_cycles;
+	note("resize test: %d threads, %d ticks, %d expected",
+	     size, _runnable_i, expected);
+	if (_runnable_i != expected) {
+		return 0;
+	}
+
+	// Check return codes
+	return ret == 0;
+}
+
+/*! \brief Resize unit while threads are active. */
+static inline int dt_test_liveresize(dt_unit_t *unit)
+{
+	// Size
+	int size = unit->size;
+	int size_hi = size + 2;
+	int size_lo = size - 1;
+
+	// Expand
+	int ret = 0;
+	ret = dt_resize(unit, size_hi);
+	if (ret < 0) {
+		return 0;
+	}
+
+	// Repurpose all
+	for (int i = 0; i < unit->size; ++i) {
+		ret += dt_repurpose(unit->threads[i], &runnable, 0);
+	}
+
+	// Restart
+	_runnable_i = 0;
+	ret += dt_start(unit);
+
+	// Shrink
+	ret += dt_resize(unit, size_lo);
+
+	// Wait for finish
+	ret += dt_join(unit);
+
+	// Verify
+	int expected_hi = size_hi * _runnable_cycles;
+	int expected_lo = size_lo * _runnable_cycles;
+	note("resize test: %d->%d->%d threads, %d ticks, <%d,%d> expected",
+	     size, size_hi, size_lo, _runnable_i, expected_lo, expected_hi);
+
+	if (_runnable_i > expected_hi || _runnable_i < expected_lo) {
+		return 0;
+	}
+
+	// Check return codes
+	return ret == 0;
+}
+
+/*! \brief Start unit. */
+static inline int dt_test_start(dt_unit_t *unit)
+{
+	return dt_start(unit) == 0;
+}
+
+/*! \brief Stop unit. */
+static inline int dt_test_stop(dt_unit_t *unit)
+{
+	return dt_stop(unit);
+}
+
+/*! \brief Join unit. */
+static inline int dt_test_join(dt_unit_t *unit)
+{
+	return dt_join(unit) == 0;
+}
+
+/*! API: return number of tests. */
+static int dt_tests_count(int argc, char *argv[])
+{
+	return DT_TEST_COUNT;
+}
+
+// Signal handler
+static void interrupt_handle(int s)
+{
+}
+
+/*! API: run tests. */
+static int dt_tests_run(int argc, char *argv[])
+{
+	// Register service and signal handler
+	struct sigaction sa;
+	sa.sa_handler = interrupt_handle;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+	sigaction(SIGALRM, &sa, NULL); // Interrupt
+
+	/* Initialize */
+	srand(time(NULL));
+	struct timeval tv;
+	pthread_mutex_init(&_runnable_mx, NULL);
+
+	/* Test 1: Create unit */
+	dt_unit_t *unit = dt_test_create(dt_optimal_size());
+	ok(unit != 0, "dthreads: create unit (optimal size %d)", unit->size);
+	skip(unit == 0, DT_TEST_COUNT - 1);
+
+	/* Test 2: Assign a single task. */
+	ok(dt_test_single(unit), "dthreads: assign single task");
+
+	/* Test 3: Start tasks. */
+	_runnable_i = 0;
+	ok(dt_test_start(unit), "dthreads: start single task");
+
+	/* Test 4: Wait for tasks. */
+	ok(dt_test_join(unit), "dthreads: join threads");
+
+	/* Test 5: Compare counter. */
+	int expected = _runnable_cycles * 1;
+	cmp_ok(_runnable_i, "==", expected, "dthreads: result ok");
+
+	/* Test 6: Repurpose threads. */
+	_runnable_i = 0;
+	ok(dt_test_coherent(unit), "dthreads: repurpose to coherent");
+
+	/* Test 7: Restart threads. */
+	ok(dt_test_start(unit), "dthreads: start coherent unit");
+
+	/* Test 8: Repurpose single thread. */
+	tv.tv_sec = 0;
+	tv.tv_usec = 4000 + rand() % 1000; // 4-5ms
+	note("waiting for %dus to let thread do some work ...",
+	     tv.tv_usec);
+	select(0, 0, 0, 0, &tv);
+	ok(dt_test_repurpose(unit, 0), "dthreads: repurpose on-the-fly");
+
+	/* Test 9: Cancel blocking thread. */
+	tv.tv_sec = 0;
+	tv.tv_usec = (250 + rand() % 500) * 1000; // 250-750ms
+	note("waiting for %dms to let thread pretend blocking I/O ...",
+	     tv.tv_usec / 1000);
+	select(0, 0, 0, 0, &tv);
+	ok(dt_test_cancel(unit, 0), "dthreads: cancel blocking thread");
+
+	/* Test 10: Wait for tasks. */
+	ok(dt_test_join(unit), "dthreads: join threads");
+
+	/* Test 11: Compare counter. */
+	int expected_lo = _runnable_cycles * (unit->size - 1);
+	cmp_ok(_runnable_i, ">=", expected_lo,
+	       "dthreads: result %d is => %d", _runnable_i, expected_lo);
+
+	/* Test 12: Compare counter #2. */
+	int expected_hi = _runnable_cycles * unit->size;
+	cmp_ok(_runnable_i, "<=", expected_hi,
+	       "dthreads: result %d is <= %d", _runnable_i, expected_hi);
+
+	/* Test 13: Reanimate dead threads. */
+	ok(dt_test_reanimate(unit), "dthreads: reanimate dead threads");
+
+	/* Test 14: Expand unit by 100%. */
+	int size = unit->size * 2;
+	ok(dt_test_resize(unit, size),
+	   "dthreads: expanding unit to size * 2 (%d threads)", size);
+
+	/* Test 15: Shrink unit to half. */
+	size = unit->size / 2;
+	ok(dt_test_resize(unit, size),
+	   "dthreads: shrinking unit to size / 2 (%d threads)", size);
+
+	/* Test 16: Resize while threads are active. */
+	ok(dt_test_liveresize(unit), "dthreads: resizing unit while active");
+
+	/* Test 17: Deinitialize */
+	dt_delete(&unit);
+	ok(unit == 0, "dthreads: delete unit");
+	endskip;
+
+	/* Test 18: Wrong values. */
+	unit = dt_create(-1);
+	ok(unit == 0, "dthreads: create with negative count");
+	unit = dt_create_coherent(dt_optimal_size(), 0, 0);
+
+	/* Test 19: NULL runnable. */
+	cmp_ok(dt_start(unit), "==", 0, "dthreads: start with NULL runnable");
+
+	/* Test 20: resize to negative value. */
+	cmp_ok(dt_resize(unit, -19),
+	       "<", 0, "dthreads: resize to negative size");
+
+	/* Test 21: resize to zero value. */
+	cmp_ok(dt_resize(unit, 0), "<", 0, "dthreads: resize to NULL size");
+	dt_join(unit);
+	dt_delete(&unit);
+
+	/* Test 22: NULL operations crashing. */
+	int op_count = 14;
+	int expected_min = op_count * -1;
+	// All functions must return -1 at least
+	int ret = 0;
+	lives_ok( {
+		ret += dt_activate(0);              // -1
+		ret += dt_cancel(0);                // -1
+		ret += dt_compact(0);               // -1
+		dt_delete(0);                //
+		ret += dt_is_cancelled(0);          // 0
+		ret += dt_join(0);                  // -1
+		ret += dt_repurpose(0, 0, 0);       // -1
+		ret += dt_resize(0, 0);             // -1
+		ret += dt_setprio(0, 0);            // -1
+		ret += dt_signalize(0, SIGALRM);    // -1
+		ret += dt_start(0);                 // -1
+		ret += dt_start_id(0);              // -1
+		ret += dt_stop(0);                  // -1
+		ret += dt_stop_id(0);               // -1
+		ret += dt_unit_lock(0);             // -1
+		ret += dt_unit_unlock(0);           // -1
+	}, "dthreads: not crashed while executing functions on NULL context");
+
+	/* Test 23: expected results. */
+	cmp_ok(ret, "<=", expected_min,
+	       "dthreads: correct values when passed NULL context "
+	       "(%d, min: %d)", ret, expected_min);
+
+	pthread_mutex_destroy(&_runnable_mx);
+	return 0;
+}
diff --git a/src/tests/knot/dthreads_tests.h b/src/tests/knot/dthreads_tests.h
new file mode 100644
index 0000000..e41bdc5
--- /dev/null
+++ b/src/tests/knot/dthreads_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_DTHREADS_TESTS_H_
+#define _KNOTD_DTHREADS_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api dthreads_tests_api;
+
+#endif /* _KNOTD_DTHREADS_TESTS_H_ */
diff --git a/src/tests/knot/journal_tests.c b/src/tests/knot/journal_tests.c
new file mode 100644
index 0000000..21c92fe
--- /dev/null
+++ b/src/tests/knot/journal_tests.c
@@ -0,0 +1,184 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <string.h>
+
+#include "tests/knot/journal_tests.h"
+#include "knot/server/journal.h"
+#include "knot/other/error.h"
+
+static int journal_tests_count(int argc, char *argv[]);
+static int journal_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api journal_tests_api = {
+	"Journal",
+	&journal_tests_count,
+	&journal_tests_run
+};
+
+/*
+ *  Unit implementation.
+ */
+static const int JOURNAL_TEST_COUNT = 11;
+
+/*! \brief Generate random string with given length. */
+static int randstr(char* dst, size_t len)
+{
+	for (int i = 0; i < len - 1; ++i) {
+		dst[i] = '0' + (int) (('Z'-'0') * (rand() / (RAND_MAX + 1.0)));
+	}
+	dst[len - 1] = '\0';
+
+	return 0;
+}
+
+/*! \brief Walk journal of chars into buffer. */
+static int  _wbi = 0;
+static char _walkbuf[7];
+static int walkchars_cmp(uint64_t k1, uint64_t k2) {
+	return k1 - k2;
+}
+
+static int walkchars(journal_t *j, journal_node_t *n) {
+	journal_read(j, n->id, walkchars_cmp, _walkbuf + _wbi);
+	++_wbi;
+	return 0;
+} 
+
+/*! API: return number of tests. */
+static int journal_tests_count(int argc, char *argv[])
+{
+	return JOURNAL_TEST_COUNT;
+}
+
+/*! API: run tests. */
+static int journal_tests_run(int argc, char *argv[])
+{
+	/* Test 1: Create tmpfile. */
+	int fsize = 8092;
+	int jsize = 6;
+	char jfn_buf[] = "/tmp/journal.XXXXXX";
+	int tmp_fd = mkstemp(jfn_buf);
+	ok(tmp_fd >= 0, "journal: create temporary file");
+	skip(tmp_fd < 0, JOURNAL_TEST_COUNT - 1);
+
+	/* Test 2: Create journal. */
+	const char *jfilename = jfn_buf;
+	int ret = journal_create(jfilename, jsize);
+	ok(ret == KNOTD_EOK, "journal: create journal '%s'", jfilename);
+
+	/* Test 3: Open journal. */
+	journal_t *j = journal_open(jfilename, fsize, 0);
+	ok(j != 0, "journal: open");
+
+	/* Test 4: Write entry to log. */
+	const char *sample = "deadbeef";
+	ret = journal_write(j, 0x0a, sample, strlen(sample));
+	ok(ret == KNOTD_EOK, "journal: write");
+
+	/* Test 5: Read entry from log. */
+	char tmpbuf[64] = {'\0'};
+	ret = journal_read(j, 0x0a, 0, tmpbuf);
+	ok(ret == KNOTD_EOK, "journal: read entry");
+
+	/* Test 6: Compare read data. */
+	ret = strncmp(sample, tmpbuf, strlen(sample));
+	ok(ret == 0, "journal: read data integrity check");
+	
+	/* Append several characters. */
+	journal_write(j, 0, "X", 1); /* Dummy */
+	char word[7] =  { 'w', 'o', 'r', 'd', '0', '\0', '\0' };
+	for (int i = 0; i < strlen(word); ++i) {
+		journal_write(j, i, word+i, 1);
+	}
+
+	/* Test 7: Compare journal_walk() result. */
+	_wbi = 0;
+	journal_walk(j, walkchars);
+	_walkbuf[_wbi] = '\0';
+	ret = strcmp(word, _walkbuf);
+	ok(ret == 0, "journal: read data integrity check 2 '%s'", _walkbuf);
+	_wbi = 0;
+	
+	/* Test 8: Change single letter and compare. */
+	word[5] = 'X';
+	journal_write(j, 5, word+5, 1); /* append 'X', shifts out 'w' */
+	journal_walk(j, walkchars);
+	_walkbuf[_wbi] = '\0';
+	ret = strcmp(word + 1, _walkbuf);
+	ok(ret == 0, "journal: read data integrity check 3 '%s'", _walkbuf);
+	_wbi = 0;
+	
+	/* Close journal. */
+	journal_close(j);
+	
+	/* Recreate journal. */
+	remove(jfilename);
+	fsize = 8092;
+	jsize = 512;
+	ret = journal_create(jfilename, jsize);
+	j = journal_open(jfilename, fsize, 0);
+	
+	/* Test 9: Write random data. */
+	int chk_key = 0;
+	char chk_buf[64] = {'\0'};
+	ret = 0;
+	const int itcount = 1;//jsize * 5 + 5;
+	for (int i = 0; i < itcount; ++i) {
+		int key = rand() % 65535;
+		randstr(tmpbuf, sizeof(tmpbuf));
+		if (journal_write(j, key, tmpbuf, sizeof(tmpbuf)) != KNOTD_EOK) {
+			ret = -1;
+			break;
+		}
+
+		/* Store some key on the end. */
+		if (i == itcount - 2) {
+			chk_key = key;
+			memcpy(chk_buf, tmpbuf, sizeof(chk_buf));
+		}
+	}
+	ok(ret == 0, "journal: sustained looped writes");
+
+	/* Test 10: Check data integrity. */
+	memset(tmpbuf, 0, sizeof(tmpbuf));
+	journal_read(j, chk_key, 0, tmpbuf);
+	ret = strncmp(chk_buf, tmpbuf, sizeof(chk_buf));
+	ok(ret == 0, "journal: read data integrity check");
+
+	/* Test 11: Reopen log and re-read value. */
+	memset(tmpbuf, 0, sizeof(tmpbuf));
+	journal_close(j);
+	j = journal_open(jfilename, fsize, 0);
+	journal_read(j, chk_key, 0, tmpbuf);
+	ret = strncmp(chk_buf, tmpbuf, sizeof(chk_buf));
+	ok(ret == 0, "journal: read data integrity check after close/open");
+
+	/* Close journal. */
+	journal_close(j);
+
+	/* Close temporary file fd. */
+	close(tmp_fd);
+
+	/* Delete journal. */
+	remove(jfilename);
+
+	endskip;
+
+	return 0;
+}
diff --git a/src/tests/knot/journal_tests.h b/src/tests/knot/journal_tests.h
new file mode 100644
index 0000000..beec8ca
--- /dev/null
+++ b/src/tests/knot/journal_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_JOURNAL_TESTS_H_
+#define _KNOTD_JOURNAL_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api journal_tests_api;
+
+#endif /* _KNOTD_JOURNAL_TESTS_H_ */
diff --git a/src/tests/knot/server_tests.c b/src/tests/knot/server_tests.c
new file mode 100644
index 0000000..5ae04d8
--- /dev/null
+++ b/src/tests/knot/server_tests.c
@@ -0,0 +1,113 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "tests/knot/server_tests.h"
+#include "knot/server/server.h"
+
+static int server_tests_count(int argc, char *argv[]);
+static int server_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api server_tests_api = {
+	"Server",
+	&server_tests_count,
+	&server_tests_run
+};
+
+/*
+ *  Unit implementation.
+ */
+
+static const int SERVER_TEST_COUNT = 4;
+
+/*! Test: create server. */
+server_t *test_server_create()
+{
+	return server_create();
+}
+
+/*! Test: start server. */
+int test_server_start(server_t *s)
+{
+	return server_start(s) == 0;
+}
+
+/*! Test: finish server. */
+int test_server_finish(server_t *s)
+{
+	return server_wait(s) == 0;
+}
+
+/*! Test: stop server. */
+int test_server_destroy(server_t *s)
+{
+	server_destroy(&s);
+	return s == 0;
+}
+
+/*! API: return number of tests. */
+static int server_tests_count(int argc, char *argv[])
+{
+	return SERVER_TEST_COUNT + 1;
+}
+
+// Signal handler
+static void interrupt_handle(int s)
+{
+}
+
+/*! API: run tests. */
+static int server_tests_run(int argc, char *argv[])
+{
+	server_t *server = 0;
+	int ret = 0;
+
+	// Register service and signal handler
+	struct sigaction sa;
+	sa.sa_handler = interrupt_handle;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+	sigaction(SIGALRM, &sa, NULL); // Interrupt
+
+	//! Test server for correct initialization
+	server = test_server_create();
+	ok(server != 0, "server: initialized");
+
+	//! Test server startup
+	ret = 0;
+	lives_ok( {
+		ret = test_server_start(server);
+	}, "server: not crashing on runtime");
+
+	//! Test server exit code
+	ok(ret, "server: started ok");
+	if (ret) {
+		server_stop(server);
+	} else {
+		diag("server crashed, skipping deinit and destroy tests");
+	}
+
+	//! Test server waiting for finish
+	skip(!ret, 2);
+	ok(test_server_finish(server), "server: waiting for finish");
+
+	//! Test server for correct deinitialization
+	ok(test_server_destroy(server), "server: deinit");
+	endskip;
+
+	return 0;
+}
diff --git a/src/tests/knot/server_tests.h b/src/tests/knot/server_tests.h
new file mode 100644
index 0000000..43ad0c1
--- /dev/null
+++ b/src/tests/knot/server_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_SERVER_TESTS_H_
+#define _KNOTD_SERVER_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api server_tests_api;
+
+#endif /* _KNOTD_SERVER_TESTS_H_ */
diff --git a/src/tests/libknot/files/parsed_data b/src/tests/libknot/files/parsed_data
new file mode 100644
index 0000000..4027c92
--- /dev/null
+++ b/src/tests/libknot/files/parsed_data
diff --git a/src/tests/libknot/files/parsed_data_queries b/src/tests/libknot/files/parsed_data_queries
new file mode 100644
index 0000000..5857c87
--- /dev/null
+++ b/src/tests/libknot/files/parsed_data_queries
diff --git a/src/tests/libknot/files/raw_data b/src/tests/libknot/files/raw_data
new file mode 100644
index 0000000..f94236b
--- /dev/null
+++ b/src/tests/libknot/files/raw_data
diff --git a/src/tests/libknot/files/raw_data_queries b/src/tests/libknot/files/raw_data_queries
new file mode 100644
index 0000000..9062d5a
--- /dev/null
+++ b/src/tests/libknot/files/raw_data_queries
diff --git a/src/tests/libknot/libknot/cuckoo_tests.c b/src/tests/libknot/libknot/cuckoo_tests.c
new file mode 100644
index 0000000..c1306a3
--- /dev/null
+++ b/src/tests/libknot/libknot/cuckoo_tests.c
@@ -0,0 +1,382 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <time.h>
+#include <assert.h>
+
+#include "tests/libknot/libknot/cuckoo_tests.h"
+
+#include "libknot/hash/cuckoo-hash-table.h"
+
+//#define CK_TEST_DEBUG
+//#define CK_TEST_LOOKUP
+//#define CK_TEST_OUTPUT
+//#define CK_TEST_REMOVE
+//#define CK_TEST_COMPARE
+
+#ifdef CK_TEST_DEBUG
+#define CK_TEST_LOOKUP
+#define CK_TEST_OUTPUT
+#define CK_TEST_REMOVE
+#define CK_TEST_COMPARE
+#endif
+
+/*----------------------------------------------------------------------------*/
+
+static int cuckoo_tests_count(int argc, char *argv[]);
+static int cuckoo_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api cuckoo_tests_api = {
+	"Cuckoo hashing",     //! Unit name
+	&cuckoo_tests_count,  //! Count scheduled tests
+	&cuckoo_tests_run     //! Run scheduled tests
+};
+
+/*----------------------------------------------------------------------------*/
+
+/*
+ * Unit implementation
+ */
+static const int CUCKOO_TESTS_COUNT = 13;
+static const int CUCKOO_MAX_ITEMS = 1000;
+static const int CUCKOO_TEST_MAX_KEY_SIZE = 10;
+
+typedef struct test_cuckoo_items {
+	char **keys;
+	size_t *key_sizes;
+	size_t *values;
+	size_t *deleted;
+	int count;
+	int total_count;
+} test_cuckoo_items;
+
+/*----------------------------------------------------------------------------*/
+
+static inline char rand_char()
+{
+	return (char)((rand() % 26) + 97);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static inline void rand_str(char *str, int size)
+{
+	for (int i = 0; i < size; ++i) {
+		str[i] = rand_char();
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int cuckoo_tests_count(int argc, char *argv[])
+{
+	return CUCKOO_TESTS_COUNT;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_create(ck_hash_table_t **table, uint items)
+{
+	*table = ck_create_table(items);
+	return (*table != NULL);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_insert(ck_hash_table_t *table,
+                              const test_cuckoo_items *items)
+{
+	assert(table != NULL);
+	int errors = 0;
+	for (int i = 0; i < items->count; ++i) {
+		assert(items->values[i] != 0);
+		if (ck_insert_item(table, items->keys[i], items->key_sizes[i],
+		                   (void *)items->values[i]) != 0) {
+			++errors;
+		}
+	}
+	return errors == 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_lookup(ck_hash_table_t *table,
+                              const test_cuckoo_items *items)
+{
+	int errors = 0;
+	for (int i = 0; i < items->count; ++i) {
+		const ck_hash_table_item_t *found = ck_find_item(
+		                table, items->keys[i], items->key_sizes[i]);
+		if (!found) {
+			if (items->deleted[i] == 0) {
+				diag("Not found item with key %.*s\n",
+				     items->key_sizes[i], items->keys[i]);
+				++errors;
+			}
+		} else {
+			if (items->deleted[i] != 0
+			    || found->key != items->keys[i]
+			    || (size_t)(found->value) != items->values[i]) {
+				diag("Found item with key %.*s (size %u) "
+				     "(should be %.*s (size %u)) and value %zu "
+				     "(should be %d).\n",
+				     found->key_length, found->key,
+				     found->key_length, items->key_sizes[i],
+				     items->keys[i], items->key_sizes[i],
+				     (size_t)found->value, items->values[i]);
+				++errors;
+			}
+		}
+	}
+
+	if (errors > 0) {
+		diag("Not found %d of %d items.\n", errors, items->count);
+	} else {
+		note("Found %d items.\n", items->count);
+	}
+
+	return errors == 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_delete(ck_hash_table_t *table, test_cuckoo_items *items)
+{
+	int errors = 0;
+	// delete approx. 1/10 items from the table
+	int count = rand() % (CUCKOO_MAX_ITEMS / 10) + 1;
+
+	for (int i = 0; i < count; ++i) {
+		int item = rand() % items->count;
+		if (items->deleted[item] == 0
+		    && ck_delete_item(table, items->keys[item],
+		                      items->key_sizes[item], NULL, 0) != 0) {
+			++errors;
+		} else {
+			items->deleted[item] = 1;
+		}
+	}
+
+	return errors == 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_modify(ck_hash_table_t *table, test_cuckoo_items *items)
+{
+	int errors = 0;
+	// modify approx. 1/10 items from the table
+	int count = rand() % (CUCKOO_MAX_ITEMS / 10) + 1;
+
+	for (int i = 0; i < count; ++i) {
+		int item = rand() % items->count;
+		int old_value = items->values[item];
+		items->values[item] = rand() + 1;
+		if (ck_update_item(table, items->keys[item],
+		                   items->key_sizes[item],
+		                   (void *)items->values[item], NULL) != 0
+		                && items->deleted[item] == 1) {
+			++errors;
+			items->values[item] = old_value;
+		}
+	}
+
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_rehash(ck_hash_table_t *table)
+{
+	return (ck_rehash(table) == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_resize(ck_hash_table_t *table) 
+{
+	// test the resize explicitly
+	return (ck_resize_table(table) == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_cuckoo_full(ck_hash_table_t *table, test_cuckoo_items *items)
+{
+	// invoke the resize by inserting so much items that thay cannot
+	// fit into the table
+	int new_count = table->items;
+	
+	while (new_count < hashsize(table->table_size_exp) * table->table_count) {
+		new_count += table->items;
+	}
+	
+	note("Old item count: %d, new count: %d, capacity of the table: %d\n",
+	     table->items, new_count, 
+	     hashsize(table->table_size_exp) * table->table_count);
+	
+	assert(new_count <= items->total_count);
+	
+	int errors = 0;
+	
+	for (int i = items->count; i < new_count; ++i) {
+		assert(items->values[i] != 0);
+		if (ck_insert_item(table, items->keys[i], items->key_sizes[i],
+		                   (void *)items->values[i]) != 0) {
+			++errors;
+		}
+	}
+	
+	items->count = new_count;
+	
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void create_random_items(test_cuckoo_items *items, int item_count)
+{
+	assert(items != NULL);
+
+	items->count = item_count;
+	items->total_count = item_count * 10;
+	items->values = (size_t *)malloc(items->total_count * sizeof(size_t));
+	items->key_sizes = (size_t *)malloc(items->total_count * sizeof(size_t));
+	items->deleted = (size_t *)malloc(items->total_count * sizeof(size_t));
+	items->keys = (char **)malloc(items->total_count * sizeof(char *));
+
+	for (int i = 0; i < items->total_count; ++i) {
+		int value = rand() + 1;
+		int key_size = rand() % CUCKOO_TEST_MAX_KEY_SIZE + 1;
+		char *key = malloc(key_size * sizeof(char));
+		assert(key != NULL);
+		rand_str(key, key_size);
+
+		// check if the key is not already in the table
+		int found = 0;
+		for (int j = 0; j < i; ++j) {
+			if (items->key_sizes[j] == key_size
+			    && strncmp(items->keys[j], key, key_size) == 0) {
+				found = 1;
+				break;
+			}
+		}
+
+		if (!found) {
+			assert(value != 0);
+			items->values[i] = value;
+			items->key_sizes[i] = key_size;
+			items->keys[i] = key;
+			items->deleted[i] = 0;
+		} else {
+			free(key);
+			--i;
+		}
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void delete_items(test_cuckoo_items *items)
+{
+	free(items->deleted);
+	free(items->key_sizes);
+	free(items->values);
+	for (int i = 0; i < items->total_count; ++i) {
+		free(items->keys[i]);
+	}
+	free(items->keys);
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int cuckoo_tests_run(int argc, char *argv[])
+{
+	srand(time(NULL));
+	int res;
+
+	const int item_count = rand() % CUCKOO_MAX_ITEMS + 1;
+	test_cuckoo_items *items = (test_cuckoo_items *)
+	                           malloc(sizeof(test_cuckoo_items));
+
+	ck_hash_table_t *table = NULL;
+
+	// Test 1: create
+	ok(res = test_cuckoo_create(&table, item_count),
+	   "cuckoo hashing: create");
+
+	create_random_items(items, item_count);
+
+	skip(!res, 10);
+	// Test 2: insert
+	ok(test_cuckoo_insert(table, items), "cuckoo hashing: insert");
+
+	// Test 3: lookup
+	ok(test_cuckoo_lookup(table, items), "cuckoo hashing: lookup");
+
+	// Test 4: delete
+	ok(test_cuckoo_delete(table, items), "cuckoo hashing: delete");
+
+	// Test 5: lookup 2
+	ok(test_cuckoo_lookup(table, items),
+	   "cuckoo hashing: lookup after delete");
+
+	// Test 6: modify
+	ok(test_cuckoo_modify(table, items), "cuckoo hashing: modify");
+
+	// Test 7: lookup 3
+	ok(test_cuckoo_lookup(table, items),
+	   "cuckoo hashing: lookup after modify");
+
+	// Test 8: rehash
+	ok(test_cuckoo_rehash(table), "cuckoo hashing: rehash");
+	
+	// Test 9: lookup 4
+	ok(test_cuckoo_lookup(table, items),
+	   "cuckoo hashing: lookup after rehash");
+	
+	// Test 10: resize
+	ok(test_cuckoo_resize(table), "cuckoo hashing: resize");
+	
+	// Test 11: lookup 5
+	ok(test_cuckoo_lookup(table, items),
+	   "cuckoo hashing: lookup after resize");
+	
+	// Test 12: owerflow the table
+	ok(test_cuckoo_full(table, items), "cuckoo hashing: overflow");
+	
+	// Test 13: lookup 5
+	ok(test_cuckoo_lookup(table, items),
+	   "cuckoo hashing: lookup after overflow");
+
+	endskip;
+
+	/**
+	 * \note These last 2 tests found some major bug in the cuckoo hash
+	 * table, so running them results in abort upon assertion.
+	 * Disabled for now.
+	 */
+
+	// Cleanup
+	ck_destroy_table(&table, NULL, 0);
+	delete_items(items);
+	free(items);
+
+	return 0;
+}
diff --git a/src/tests/libknot/libknot/cuckoo_tests.h b/src/tests/libknot/libknot/cuckoo_tests.h
new file mode 100644
index 0000000..b6b0db8
--- /dev/null
+++ b/src/tests/libknot/libknot/cuckoo_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_CUCKOO_TESTS_H_
+#define _KNOTD_CUCKOO_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api cuckoo_tests_api;
+
+#endif /* _KNOTD_CUCKOO_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/dname_table_tests.c b/src/tests/libknot/libknot/dname_table_tests.c
new file mode 100644
index 0000000..0d00a44
--- /dev/null
+++ b/src/tests/libknot/libknot/dname_table_tests.c
@@ -0,0 +1,393 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+
+#include "dname_table_tests.h"
+#include "libknot/util/error.h"
+#include "libknot/zone/dname-table.h"
+/* *test_t structures */
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+
+static int knot_dname_table_tests_count(int argc, char *argv[]);
+static int knot_dname_table_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api dname_table_tests_api = {
+	"Dname table",     //! Unit name
+	&knot_dname_table_tests_count,  //! Count scheduled tests
+	&knot_dname_table_tests_run     //! Run scheduled tests
+};
+
+/* Helper functions. */
+static knot_dname_t *dname_from_test_dname_str(const test_dname_t *test_dname)
+{
+	assert(test_dname != NULL);
+	knot_dname_t *ret = knot_dname_new_from_str (test_dname->str,
+						strlen(test_dname->str),
+						NULL);
+	CHECK_ALLOC(ret, NULL);
+
+	return ret;
+}
+
+static int dname_compare_sort_wrapper(const void *ptr1, const void *ptr2)
+{
+	const knot_dname_t *dname1 =
+		dname_from_test_dname_str((const test_dname_t *)ptr1);
+	const knot_dname_t *dname2 =
+		dname_from_test_dname_str((const test_dname_t *)ptr2);
+	assert(dname1 && dname2);
+	return knot_dname_compare(dname1, dname2);
+}
+
+/* Unit implementation. */
+enum {DNAME_TABLE_DNAME_COUNT = 3};
+
+/* Strings are enough, we're not testing dname here ... */
+static test_dname_t DNAME_TABLE_DNAMES[DNAME_TABLE_DNAME_COUNT] = {
+	/* list ptr, string, wire, length, labels, label_count */
+	{NULL, NULL, ".", NULL, 1, NULL, 0},
+	{NULL, NULL, "a.ns.nic.cz.", NULL, 13, NULL, 0},
+	{NULL, NULL, "b.ns.nic.cz.", NULL, 13, NULL, 0}
+};
+
+static int test_dname_table_new()
+{
+	knot_dname_table_t *table = knot_dname_table_new();
+	if (table == NULL) {
+		return 0;
+	}
+
+	knot_dname_table_free(&table);
+	return 1;
+}
+
+struct test_dname_table_arg {
+	/* Times two - safety measure. */
+	knot_dname_t *array[DNAME_TABLE_DNAME_COUNT * 2];
+	uint count;
+};
+
+static void save_dname_to_array(knot_dname_t *node, void *data)
+{
+	assert(data);
+	struct test_dname_table_arg *arg = (struct test_dname_table_arg *)data;
+	arg->array[arg->count] = node;
+	arg->count++;
+}
+
+static int test_dname_table_adding()
+{
+	int errors = 0;
+	knot_dname_table_t *table = knot_dname_table_new();
+	CHECK_ALLOC(table, 0);
+
+	/* Add NULL */
+	if (knot_dname_table_add_dname(table, NULL) != KNOT_EBADARG) {
+		diag("Adding NULL dname did not result in an error!");
+		errors++;
+	}
+
+	/* Add to NULL table*/
+	if (knot_dname_table_add_dname(NULL, NULL) != KNOT_EBADARG) {
+		diag("Adding to NULL table did not result in an error!");
+		errors++;
+	}
+
+	/* Add NULL */
+	if (knot_dname_table_add_dname_check(table, NULL) != KNOT_EBADARG) {
+		diag("Adding NULL dname did not result in an error!");
+		errors++;
+	}
+
+	/* Add to NULL table*/
+	if (knot_dname_table_add_dname_check(NULL, NULL) != KNOT_EBADARG) {
+		diag("Adding to NULL table did not result in an error!");
+		errors++;
+	}
+
+
+	/* Add valid dnames. */
+	for (int i = 0; i < DNAME_TABLE_DNAME_COUNT; i++) {
+		knot_dname_t *dname =
+			dname_from_test_dname_str(&DNAME_TABLE_DNAMES[i]);
+		if (!dname) {
+			diag("Could not create dname from test dname!");
+			errors++;
+			continue;
+		}
+		if (knot_dname_table_add_dname(table, dname) != KNOT_EOK) {
+			diag("Could not add dname! (%s)",
+			     DNAME_TABLE_DNAMES[i].str);
+			errors++;
+		}
+	}
+
+	/*
+	 * Using inorder traversal of the table,
+	 * create array containing dnames.
+	 */
+
+	struct test_dname_table_arg arg;
+	arg.count = 0;
+
+	knot_dname_table_tree_inorder_apply(table, save_dname_to_array, &arg);
+
+	if (arg.count != DNAME_TABLE_DNAME_COUNT) {
+		diag("Table contains too many dnames!");
+		/* No sense in continuing. */
+		knot_dname_table_deep_free(&table);
+		return 0;
+	}
+
+	/*
+	 * Check that inordered array is really sorted
+	 * and contains valid dnames.
+	 */
+	for (int i = 0; i < DNAME_TABLE_DNAME_COUNT; i++) {
+		assert(arg.array[i]);
+		const char *str = knot_dname_to_str(arg.array[i]);
+		if (str == NULL) {
+			diag("Wrong dname in table!");
+			errors++;
+			continue;
+		}
+
+		if (arg.array[i]->size !=
+		                DNAME_TABLE_DNAMES[i].size) {
+			diag("Wrong dname size in table!");
+			diag("Is: %u should be %u.",
+			     arg.array[i]->size,
+			     DNAME_TABLE_DNAMES[i].size);
+			errors++;
+			continue;
+		}
+
+		if (strncmp(str, DNAME_TABLE_DNAMES[i].str,
+		            DNAME_TABLE_DNAMES[i].size) != 0) {
+			diag("Wrong dname wire in table!");
+			errors++;
+		}
+	}
+
+	/* Now add one dname once again. It has to be the first item! */
+
+	if (knot_dname_table_add_dname(table,
+		dname_from_test_dname_str(&DNAME_TABLE_DNAMES[0])) !=
+	                                 KNOT_EOK) {
+		diag("Could not add dname to table once it's already there!");
+		/* Next test would not make sense. */
+		knot_dname_table_deep_free(&table);
+		return 0;
+	}
+
+	/*
+	 * After walking the table, there should now be
+	 * DNAME_TABLE_DNAME_COUNT + 1 items, with 2 identical
+	 * items at the beginning.
+	 */
+
+	memset(arg.array, 0,
+	       sizeof(knot_dname_t *) * DNAME_TABLE_DNAME_COUNT * 2);
+	arg.count = 0;
+	knot_dname_table_tree_inorder_apply(table, save_dname_to_array, &arg);
+
+	if (arg.count != DNAME_TABLE_DNAME_COUNT + 1) {
+		diag("Identical dname was not added!");
+		/* Again, next test would not make any sense. */
+		knot_dname_table_deep_free(&table);
+		return 0;
+	}
+
+	if (knot_dname_compare(arg.array[0], arg.array[1]) != 0) {
+		diag("First two dnames in table are not identical!");
+		errors++;
+	}
+
+	/* Delete table, wipe out array. */
+	knot_dname_table_deep_free(&table);
+	memset(arg.array, 0,
+	       sizeof(knot_dname_t *) * DNAME_TABLE_DNAME_COUNT * 2);
+	arg.count = 0;
+
+	table = knot_dname_table_new();
+	assert(table);
+
+	/*
+	 * Add dname with same content twice using knot_dname_table_add2 -
+	 * table should now only contain one item.
+	 */
+
+	knot_dname_t *tmp_dname =
+		dname_from_test_dname_str(&DNAME_TABLE_DNAMES[0]);
+	assert(tmp_dname);
+
+	if (knot_dname_table_add_dname_check(table, &tmp_dname) != KNOT_EOK) {
+		diag("Could not add dname using dname_table_add_dname2!");
+		knot_dname_table_deep_free(&table);
+		knot_dname_free(&tmp_dname);
+		return 0;
+	}
+
+	tmp_dname = dname_from_test_dname_str(&DNAME_TABLE_DNAMES[0]);
+	assert(tmp_dname);
+
+	knot_dname_t *dname_before_add = tmp_dname;
+
+	if (knot_dname_table_add_dname_check(table, &tmp_dname) != 1) {
+		diag("Could not add dname again using dname_table_add_dname2!");
+		knot_dname_table_deep_free(&table);
+		return 0;
+	}
+
+	if (tmp_dname == dname_before_add) {
+		diag("Dname was not freed after insertion!");
+		errors++;
+	}
+
+	knot_dname_table_tree_inorder_apply(table, save_dname_to_array, &arg);
+
+	if (arg.count != 1) {
+		diag("Add_dname2 has added dname when it shouldn't!");
+		errors++;
+	}
+
+	if (knot_dname_compare(tmp_dname, arg.array[0]) != 0) {
+		diag("Add_dname2 has added wrong dname!");
+		errors++;
+	}
+
+	knot_dname_table_deep_free(&table);
+	return (errors == 0);
+}
+
+static int test_dname_table_find()
+{
+	int errors = 0;
+	knot_dname_table_t *table = knot_dname_table_new();
+	assert(table);
+
+	if (knot_dname_table_find_dname(table, NULL) != NULL) {
+		diag("Dname table did not return NULL when searching NULL!");
+		errors++;
+	}
+
+	if (knot_dname_table_find_dname(NULL, NULL) != NULL) {
+		diag("Passing NULL instead of dname table did not "
+		     "return NULL!");
+		errors++;
+	}
+
+	/* Add all dnames but the last one. */
+	for (int i = 0; i < DNAME_TABLE_DNAME_COUNT - 1; i++) {
+		knot_dname_t *dname =
+			dname_from_test_dname_str(&DNAME_TABLE_DNAMES[i]);
+		if (!dname) {
+			diag("Could not create dname from test dname!");
+			errors++;
+			continue;
+		}
+		if (knot_dname_table_add_dname(table, dname) != KNOT_EOK) {
+			diag("Could not add dname! (%s)",
+			     DNAME_TABLE_DNAMES[i].str);
+			errors++;
+		}
+	}
+
+	/* Search for added dnames. */
+	for (int i = 0; i < DNAME_TABLE_DNAME_COUNT - 1; i++) {
+		knot_dname_t *dname =
+			dname_from_test_dname_str(&DNAME_TABLE_DNAMES[i]);
+		if (!dname) {
+			diag("Could not create dname from test dname!");
+			errors++;
+			continue;
+		}
+
+		knot_dname_t *found_dname =
+			knot_dname_table_find_dname(table, dname);
+
+		if (found_dname == NULL) {
+			diag("Dname table did not return "
+			     "dname when it should!");
+			errors++;
+			continue;
+		}
+
+		if (knot_dname_compare(found_dname, dname) != 0) {
+			diag("Returned dname did not match!");
+			errors++;
+			continue;
+		}
+	}
+
+	/* Search for last dname, it should return NULL. */
+	knot_dname_t *dname =
+		dname_from_test_dname_str(
+			&DNAME_TABLE_DNAMES[DNAME_TABLE_DNAME_COUNT]);
+	assert(dname);
+
+	if (knot_dname_table_find_dname(table, dname) != NULL) {
+		diag("Dname table returned dname when it "
+		     "should not be there!");
+		errors++;
+	}
+
+	knot_dname_free(&dname);
+	knot_dname_table_deep_free(&table);
+
+	return (errors == 0);
+}
+
+static const int KNOT_DNAME_TABLE_TEST_COUNT = 3;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_dname_table_tests_count(int argc, char *argv[])
+{
+	return KNOT_DNAME_TABLE_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_dname_table_tests_run(int argc, char *argv[])
+{
+	int final_res = 1;
+	int res = 0;
+
+	/* Sort array containing test dnames. */
+	qsort(DNAME_TABLE_DNAMES, DNAME_TABLE_DNAME_COUNT,
+	      sizeof(test_dname_t), dname_compare_sort_wrapper);
+
+	ok((res = test_dname_table_new()), "dname table: new");
+	final_res *= res;
+
+	skip(!res, 2);
+
+	ok((res = test_dname_table_adding()), "dname table: adding");
+	final_res *= res;
+
+	ok((res = test_dname_table_find()), "dname table: searching");
+	final_res *= res;
+
+	endskip;
+
+	return final_res;
+}
diff --git a/src/tests/libknot/libknot/dname_table_tests.h b/src/tests/libknot/libknot/dname_table_tests.h
new file mode 100644
index 0000000..f3088e9
--- /dev/null
+++ b/src/tests/libknot/libknot/dname_table_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_DNAME_TABLE_TESTS_H_
+#define _KNOTD_DNAME_TABLE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api dname_table_tests_api;
+
+#endif /* _KNOTD_DNAME_TABLE_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/dname_tests.c b/src/tests/libknot/libknot/dname_tests.c
new file mode 100644
index 0000000..9730756
--- /dev/null
+++ b/src/tests/libknot/libknot/dname_tests.c
@@ -0,0 +1,877 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <assert.h>
+
+#include "tests/libknot/libknot/dname_tests.h"
+#include "libknot/dname.h"
+#include "libknot/zone/node.h"
+
+static int knot_dname_tests_count(int argc, char *argv[]);
+static int knot_dname_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api dname_tests_api = {
+	"DNS library - dname",        //! Unit name
+	&knot_dname_tests_count,  //! Count scheduled tests
+	&knot_dname_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+// C will not accept const int in other const definition
+enum { TEST_DOMAINS_OK = 8 };
+
+enum { TEST_DOMAINS_BAD = 4 };
+
+enum { TEST_DOMAINS_NON_FQDN = 6 };
+
+static knot_node_t *NODE_ADDRESS = (knot_node_t *)0xDEADBEEF;
+
+struct test_domain {
+	char *str;
+	char *wire;
+	uint size;
+	char *labels;
+	short label_count;
+};
+
+/*! \warning Do not change the order in those, if you want to test some other
+ *           feature with new dname, add it at the end of these arrays.
+ */
+static const struct test_domain
+		test_domains_ok[TEST_DOMAINS_OK] = {
+	{ "abc.test.domain.com.", "\3abc\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "xyz.test.domain.com.", "\3xyz\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "test.domain.com.", "\4test\6domain\3com", 17,
+	  "\x0\x5\xC", 3 },
+        { ".", "\0", 1,
+          "", 0 },
+	{ "foo.bar.net.", "\3foo\3bar\3net", 13,
+	  "\x0\x4\x8", 3},
+	{ "bar.net.", "\3bar\3net", 9,
+	  "\x0\x4", 2}
+};
+
+static const struct test_domain // sizes are strlen()s here
+	test_domains_non_fqdn[TEST_DOMAINS_NON_FQDN] = {
+		{ "www", "\3www", 4, "\x0", 1 },
+		{ "example", "\7example", 8, "\x0", 1 },
+		{ "com", "\3com", 4, "\x0", 1 },
+		{ "www.example.com", "\3www\7example\3com", 16, "\x0\x4\xC",
+		  3 },
+		{ "some", "\4some", 5, "\x0", 1 },
+		{ "example.com", "\7example\3com", 12, "\x0\x8", 2 }
+	};
+
+static const struct test_domain
+		test_domains_bad[TEST_DOMAINS_BAD] = {
+	{ NULL, "\2ex\3com", 0, "", 0 },
+	{ "ex.com.", NULL, 0, "", 0 },
+	{ "ex.com.\5", "\3ex\3com\0\5", 10, "", 0 },
+	{ "example.com", "\3example\3com", 12, "\x0\x8", 2 }
+};
+
+static int test_dname_create()
+{
+	knot_dname_t *dname = knot_dname_new();
+	if (dname == NULL
+	    || knot_dname_name(dname) != NULL
+	    || knot_dname_size(dname) != 0
+	    || knot_dname_node(dname, 0) != NULL) {
+		diag("New domain name not initialized properly!");
+		return 0;
+	}
+	knot_dname_free(&dname);
+	if (dname != NULL) {
+		diag("Pointer to the structure not set to"
+		     "NULL when deallocating!");
+		return 0;
+	}
+	return 1;
+}
+
+static int test_dname_delete()
+{
+	// how to test this??
+	return 0;
+}
+
+static int check_domain_name(const knot_dname_t *dname,
+                             const struct test_domain *test_domains, int i,
+                             int check_node)
+{
+	int errors = 0;
+
+	if (dname == NULL) {
+		diag("Domain name #%d not created!", i);
+		return 1;
+	}
+
+	// check size
+	if (knot_dname_size(dname) != test_domains[i].size) {
+		diag("Bad size of the created domain name: %u (should be %u).",
+		     knot_dname_size(dname), test_domains[i].size);
+		++errors;
+	}
+	// check wire format
+	uint size = knot_dname_size(dname);
+	if (strncmp((char *)knot_dname_name(dname), 
+		    test_domains[i].wire, size) != 0) {
+		diag("The wire format of the created domain name is wrong:"
+		     " '%.*s' (should be '%.*s').", 
+		     size, knot_dname_name(dname),
+		     size, test_domains[i].wire);
+		++errors;
+	}
+	// check labels
+	if (test_domains[i].label_count != dname->label_count) {
+		diag("Label count of the created domain name is wrong:"
+		     " %d (should be %d)\n", dname->label_count,
+		     test_domains[i].label_count);
+		++errors;
+	}
+	if (strncmp((char *)dname->labels, test_domains[i].labels,
+		    test_domains[i].label_count) != 0) {
+		diag("Label offsets of the created domain name are wrong.\n");
+		++errors;
+	}
+
+	if (check_node) {
+		if (knot_dname_node(dname, 0) != NODE_ADDRESS) {
+			diag("Node pointer in the created domain name is wrong:"
+			     "%p (should be %p)",
+			     knot_dname_node(dname, 0), NODE_ADDRESS);
+			++errors;
+		}
+	}
+
+	return errors;
+}
+
+static int test_dname_create_from_str()
+{
+	int errors = 0;
+	knot_dname_t *dname = NULL;
+
+	for (int i = 0; i < TEST_DOMAINS_OK && errors == 0; ++i) {
+		//note("testing domain: %s", test_domains_ok[i].str);
+		dname = knot_dname_new_from_str(test_domains_ok[i].str,
+		          strlen(test_domains_ok[i].str), NODE_ADDRESS);
+		errors += check_domain_name(dname, test_domains_ok, i, 1);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_create_from_str_non_fqdn()
+{
+	int errors = 0;
+	knot_dname_t *dname = NULL;
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; ++i) {
+		//note("testing domain: %s", test_domains_non_fqdn[i].str);
+		dname = knot_dname_new_from_str(test_domains_non_fqdn[i].str,
+		          strlen(test_domains_non_fqdn[i].str), NULL);
+		errors += check_domain_name(dname, test_domains_non_fqdn, i, 0);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_cat()
+{
+	int errors = 0;
+
+	/*
+	 * This uses three particular dnames from test_domains structure
+	 * where the third dname is a concatenation of the first two dnames.
+	 */
+
+	knot_dname_t *d1, *d2, *d3;
+
+	d1 = knot_dname_new_from_str(test_domains_non_fqdn[0].str,
+	                            strlen(test_domains_non_fqdn[0].str), NULL);
+	d2 = knot_dname_new_from_str(test_domains_non_fqdn[1].str,
+	                            strlen(test_domains_non_fqdn[1].str), NULL);
+	d3 = knot_dname_new_from_str(test_domains_non_fqdn[2].str,
+	                            strlen(test_domains_non_fqdn[2].str), NULL);
+
+	knot_dname_cat(d1, d2);
+	knot_dname_cat(d1, d3);
+
+	errors += check_domain_name(d1, test_domains_non_fqdn, 3, 0);
+
+	knot_dname_free(&d1);
+	knot_dname_free(&d2);
+	knot_dname_free(&d3);
+
+	/*
+	 * Same thing as above, only different case.
+	 */
+
+	d1 = knot_dname_new_from_str(test_domains_non_fqdn[4].str,
+	                               strlen(test_domains_non_fqdn[4].str),
+	                               NODE_ADDRESS);
+
+	d2 = knot_dname_new_from_str(test_domains_ok[4].str,
+	                               strlen(test_domains_ok[4].str),
+	                               NODE_ADDRESS);
+
+	knot_dname_cat(d1, d2);
+
+	errors += check_domain_name(d1, test_domains_ok, 1, 1);
+
+	knot_dname_free(&d1);
+	knot_dname_free(&d2);
+
+	return (errors == 0);
+}
+
+static int test_dname_left_chop()
+{
+	int errors = 0;
+
+	/* Uses same principle as test_dname_cat(), only reversed */
+
+	/* TODO this would maybe deserver separate structure */
+
+	knot_dname_t *d1;
+
+	d1 = knot_dname_new_from_str(test_domains_ok[1].str,
+	                               strlen(test_domains_ok[1].str),
+	                               NODE_ADDRESS);
+
+	knot_dname_t *chopped;
+
+	chopped = knot_dname_left_chop(d1);
+
+	errors += check_domain_name(chopped, test_domains_ok, 4, 0);
+
+	knot_dname_free(&d1);
+	knot_dname_free(&chopped);
+
+	d1 = knot_dname_new_from_str(test_domains_non_fqdn[3].str,
+	                               strlen(test_domains_non_fqdn[3].str),
+	                               NODE_ADDRESS);
+
+	chopped = knot_dname_left_chop(d1);
+
+	errors += check_domain_name(chopped, test_domains_non_fqdn, 5, 0);
+
+	knot_dname_free(&d1);
+	knot_dname_free(&chopped);
+
+	return (errors == 0);
+}
+
+static int test_dname_create_from_wire()
+{
+	int errors = 0;
+	knot_dname_t *dname = NULL;
+
+	for (int i = 0; i < TEST_DOMAINS_OK && errors == 0; ++i) {
+		assert(strlen(test_domains_ok[i].wire) + 1 == 
+		       test_domains_ok[i].size);
+		dname = knot_dname_new_from_wire(
+		            (uint8_t *)test_domains_ok[i].wire,
+		            test_domains_ok[i].size, NODE_ADDRESS);
+		errors += check_domain_name(dname, test_domains_ok, i, 1);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_to_str()
+{
+	int errors = 0;
+
+	/*
+	 * Converts dname wireformat to string represenation, which is compared
+	 * with entries in test_domains structure.
+	 */
+
+	knot_dname_t *dname = NULL;
+
+	for (int i = 0; i < TEST_DOMAINS_OK && errors == 0; ++i) {
+		dname = knot_dname_new_from_wire(
+		            (uint8_t *)test_domains_ok[i].wire,
+		            test_domains_ok[i].size, NODE_ADDRESS);
+		char *name_str = knot_dname_to_str(dname);
+		if (strcmp(name_str, test_domains_ok[i].str) != 0) {
+			diag("Presentation format of domain name wrong:"
+			     " %s (should be %s)",
+			     name_str, test_domains_ok[i].str);
+			++errors;
+		}
+		free(name_str);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+/* called by lives_ok */
+static int test_faulty_data()
+{
+	knot_dname_t *dname = NULL;
+
+	/*
+	 * This takes dnames from test_domains_bad array, which contains
+	 * malformed dnames. TODO add something like: 2www3foo - it's gonna fail
+	 */
+
+	for (int i = 0; i < TEST_DOMAINS_BAD; i++) {
+
+		if (test_domains_bad[i].str != NULL) {
+			dname = knot_dname_new_from_str(
+			            test_domains_bad[i].str,
+			            strlen(test_domains_bad[i].str),
+			            NODE_ADDRESS);
+		} else {
+			dname = knot_dname_new_from_str(
+			    test_domains_bad[i].str, 0, NODE_ADDRESS);
+		}
+
+		knot_dname_free(&dname);
+
+		dname = knot_dname_new_from_wire(
+		            (uint8_t *)test_domains_bad[i].wire,
+		            test_domains_bad[i].size, NODE_ADDRESS);
+
+		knot_dname_free(&dname);
+	}
+
+	return 1; //did it get here? success
+}
+
+static int test_dname_compare()
+{
+	knot_dname_t *dnames[TEST_DOMAINS_OK];
+
+	/* This uses particular dnames from TEST_DOMAINS_OK array */
+
+	for (int i = 0; i < TEST_DOMAINS_OK; ++i) {
+		dnames[i] = knot_dname_new_from_wire(
+		                (uint8_t *)test_domains_ok[i].wire,
+		                test_domains_ok[i].size, NODE_ADDRESS);
+	}
+
+	int errors = 0;
+	/* abc < some */
+	if (knot_dname_compare(dnames[0], dnames[1]) >= 0) {
+		diag("Dname comparison error");
+		errors++;
+        }
+
+	/* abc.test.domain.com. < foo.bar.net. */
+	if (knot_dname_compare(dnames[0], dnames[6]) >= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        /* foo.bar.net. < . */
+	if (knot_dname_compare(dnames[5], dnames[0]) >= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        /* bar.net. < foo.bar.net. */
+	if (knot_dname_compare(dnames[7], dnames[6]) >= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        /* some == some */
+	if (knot_dname_compare(dnames[1], dnames[3]) != 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        /*xyz > some */
+	if (knot_dname_compare(dnames[2], dnames[1]) <= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        /*foo.bar.net. > xyz.test.domain.com. */
+	if (knot_dname_compare(dnames[6], dnames[3]) <= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+//        /* xyz.test.domain.com. > . */
+//	if (knot_dname_compare(dnames[3], dnames[5]) <= 0) {
+//		diag("Dname comparison error");
+//		errors++;
+//	}
+
+        /* bar.net. < foo.bar.net. */
+	if (knot_dname_compare(dnames[6], dnames[7]) <= 0) {
+		diag("Dname comparison error");
+		errors++;
+	}
+
+        for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		knot_dname_free(&dnames[i]);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_is_fqdn()
+{
+	int errors = 0;
+
+	knot_dname_t *dname;
+
+	/* All dnames in TEST_DOMAINS_OK are fqdn */
+
+	for (int i = 0; i < TEST_DOMAINS_OK && !errors; ++i) {
+		dname = knot_dname_new_from_wire(
+		                (uint8_t *)test_domains_ok[i].wire,
+		                test_domains_ok[i].size, NODE_ADDRESS);
+		errors += !knot_dname_is_fqdn(dname);
+		knot_dname_free(&dname);
+	}
+
+	/* None of the following dnames should be fqdn */
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN && !errors; ++i) {
+		dname = knot_dname_new_from_str(test_domains_non_fqdn[i].str,
+		          strlen(test_domains_non_fqdn[i].str), NULL);
+		errors += knot_dname_is_fqdn(dname);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_is_subdomain()
+{
+	int errors = 0;
+
+	knot_dname_t *dnames_fqdn[TEST_DOMAINS_OK];
+	knot_dname_t *dnames_non_fqdn[TEST_DOMAINS_NON_FQDN];
+
+	for (int i = 0; i < TEST_DOMAINS_OK; ++i) {
+		dnames_fqdn[i] = knot_dname_new_from_wire(
+		                (const uint8_t *)test_domains_ok[i].wire,
+		                test_domains_ok[i].size, NULL);
+		assert(dnames_fqdn[i] != NULL);
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; ++i) {
+		dnames_non_fqdn[i] = knot_dname_new_from_str(
+		                test_domains_non_fqdn[i].str,
+		                test_domains_non_fqdn[i].size, NULL);
+		assert(dnames_non_fqdn[i] != NULL);
+	}
+
+	// fqdn names 0 - 3 should be subdomains of name 4
+	knot_dname_t *parent = dnames_fqdn[4];
+	for (int i = 0; i < 3; ++i) {
+		if (!knot_dname_is_subdomain(dnames_fqdn[i], parent)) {
+			diag("(fqdn 1-%d) "
+			     "Name %s was not considered subdomain of %s", i,
+			     knot_dname_name(dnames_fqdn[i]),
+			     knot_dname_name(parent));
+			++errors;
+		}
+	}
+
+	// fqdn names 0 - 4 should be subdomains of name 5 (root)
+	parent = dnames_fqdn[5];
+	for (int i = 0; i < 4; ++i) {
+		if (!knot_dname_is_subdomain(dnames_fqdn[i], parent)) {
+			diag("(fqdn 2-%d) "
+			     "Name %s was not considered subdomain of %s", i,
+			     knot_dname_name(dnames_fqdn[i]),
+			     knot_dname_name(parent));
+			++errors;
+		}
+	}
+
+	// non-fqdn names 3 and 5 should be subdomains of non-fqdn name 2
+	parent = dnames_non_fqdn[2];
+	if (!knot_dname_is_subdomain(dnames_non_fqdn[3], parent)) {
+		diag("(non-fqdn 1) "
+		     "Name %.*s was not considered subdomain of %.*s",
+		     knot_dname_size(dnames_non_fqdn[3]),
+		     knot_dname_name(dnames_non_fqdn[3]),
+		     knot_dname_size(parent),
+		     knot_dname_name(parent));
+		++errors;
+	}
+	if (!knot_dname_is_subdomain(dnames_non_fqdn[5], parent)) {
+		diag("(non-fqdn 2) "
+		     "Name %.*s was not considered subdomain of %.*s",
+		     knot_dname_size(dnames_non_fqdn[5]),
+		     knot_dname_name(dnames_non_fqdn[5]),
+		     knot_dname_size(parent),
+		     knot_dname_name(parent));
+		++errors;
+	}
+
+	// non-fqdn name 3 should be subdomain of non-fqdn name 5
+	parent = dnames_non_fqdn[5];
+	if (!knot_dname_is_subdomain(dnames_non_fqdn[3], parent)) {
+		diag("(non-fqdn 3) "
+		     "Name %.*s was not considered subdomain of %.*s",
+		     knot_dname_size(dnames_non_fqdn[3]),
+		     knot_dname_name(dnames_non_fqdn[3]),
+		     knot_dname_size(parent),
+		     knot_dname_name(parent));
+		++errors;
+	}
+
+	// identical names should not be considered subdomains
+	if (knot_dname_is_subdomain(dnames_fqdn[0], dnames_fqdn[0])) {
+		diag("(identical names) "
+		     "Name %s was considered subdomain of itself",
+		     knot_dname_name(dnames_fqdn[0]));
+		++errors;
+	}
+	if (knot_dname_is_subdomain(dnames_fqdn[1], dnames_fqdn[3])) {
+		diag("(identical names) "
+		     "Name %s was considered subdomain of %s",
+		     knot_dname_name(dnames_fqdn[1]),
+		     knot_dname_name(dnames_fqdn[3]));
+		++errors;
+	}
+
+	// fqdn name should not be considered subdomain of non-fqdn name
+	if (knot_dname_is_subdomain(dnames_fqdn[1], dnames_non_fqdn[2])) {
+		diag("(fqdn subdomain of non-fqdn) "
+		     "Name %s was considered subdomain of %.*s",
+		     knot_dname_name(dnames_fqdn[1]),
+		     knot_dname_size(dnames_non_fqdn[2]),
+		     knot_dname_name(dnames_non_fqdn[2]));
+		++errors;
+	}
+
+	// non-fqdn name should not be considered subdomain of fqdn name
+	if (knot_dname_is_subdomain(dnames_fqdn[1], dnames_non_fqdn[2])) {
+		diag("(non-fqdn subdomain of fqdn) "
+		     "Name %s was considered subdomain of %.*s",
+		     knot_dname_name(dnames_fqdn[1]),
+		     knot_dname_size(dnames_non_fqdn[2]),
+		     knot_dname_name(dnames_non_fqdn[2]));
+		++errors;
+	}
+
+	// parent name should not be considered subdomain of its subdomain
+	if (knot_dname_is_subdomain(dnames_fqdn[4], dnames_fqdn[0])) {
+		diag("(ancestor subdomain of name) "
+		     "Name %s was considered subdomain of %s",
+		     knot_dname_name(dnames_fqdn[4]),
+		     knot_dname_name(dnames_fqdn[0]));
+		++errors;
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_OK; ++i) {
+		knot_dname_free(&dnames_fqdn[i]);
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; ++i) {
+		knot_dname_free(&dnames_non_fqdn[i]);
+	}
+
+	return (errors == 0);
+}
+
+static int check_wires(const uint8_t *wire1, uint size1,
+                         uint8_t *wire2, uint size2)
+{
+	if (size1 != size2) {
+		return 0;
+	}
+
+	int i;
+
+	for (i = 0; (i < size1); i++) {
+		if (wire1[i] != wire2[i]) {
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+/*!< \note not to be run separately */
+static int test_dname_name(knot_dname_t **dnames_fqdn,
+                           knot_dname_t **dnames_non_fqdn)
+{
+	assert(dnames_fqdn);
+	assert(dnames_non_fqdn);
+
+	int errors = 0;
+
+	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		const uint8_t *tmp_name;
+
+		tmp_name = knot_dname_name(dnames_fqdn[i]);
+		if (!check_wires(tmp_name, dnames_fqdn[i]->size,
+			        (uint8_t *)test_domains_ok[i].wire,
+				test_domains_ok[i].size)) {
+			diag("Got bad name value from structure: "
+			     "%s, should be: %s. Sizes: %d and: %d",
+			     tmp_name, test_domains_ok[i].wire,
+			     dnames_fqdn[i]->size,
+			     test_domains_ok[i].size);
+			errors++;
+		}
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+		const uint8_t *tmp_name;
+		tmp_name = knot_dname_name(dnames_non_fqdn[i]);
+		if (!check_wires(tmp_name, dnames_non_fqdn[i]->size - 1,
+			        (uint8_t *)test_domains_non_fqdn[i].wire,
+				test_domains_non_fqdn[i].size)) {
+			diag("Got bad name value from structure: "
+			     "%s, should be: %s. Sizes: %d and %d\n",
+			     tmp_name, test_domains_non_fqdn[i].wire,
+			     dnames_non_fqdn[i]->size,
+			     test_domains_non_fqdn[i].size);
+//			hex_print(dnames_non_fqdn[i]->name,
+//			         dnames_non_fqdn[i]->size);
+//			hex_print(test_domains_non_fqdn[i].wire,
+//			         test_domains_non_fqdn[i].size);
+//			diag("%s and %s\n",
+//			     knot_dname_to_str(dnames_non_fqdn[i]),
+//			     test_domains_non_fqdn[i]);
+			errors++;
+		}
+	}
+
+	return errors;
+}
+
+/* \note not to be run separately */
+static int test_dname_size(knot_dname_t **dnames_fqdn,
+                           knot_dname_t **dnames_non_fqdn)
+{
+	assert(dnames_fqdn);
+	assert(dnames_non_fqdn);
+
+	int errors = 0;
+
+	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		uint8_t tmp_size;
+		if ((tmp_size = knot_dname_size(dnames_fqdn[i])) !=
+		    test_domains_ok[i].size) {
+			diag("Got bad size value from structure: "
+			     "%u, should be: %u",
+			     tmp_size, test_domains_ok[i].size);
+			errors++;
+		}
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+		uint8_t tmp_size;
+		if ((tmp_size = knot_dname_size(dnames_non_fqdn[i])) !=
+		    test_domains_non_fqdn[i].size) {
+			diag("Got bad size value from structure: "
+			     "%u, should be: %u",
+			     tmp_size, test_domains_non_fqdn[i].size);
+			errors++;
+		}
+	}
+
+	return errors;
+}
+
+/* \note not to be run separately */
+static int test_dname_node(knot_dname_t **dnames_fqdn,
+                           knot_dname_t **dnames_non_fqdn)
+{
+	assert(dnames_fqdn);
+	assert(dnames_non_fqdn);
+
+	int errors = 0;
+
+	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		const knot_node_t *tmp_node;
+		if ((tmp_node = knot_dname_node(dnames_fqdn[i], 0)) !=
+		    NODE_ADDRESS) {
+			diag("Got bad node value from structure: "
+			     "%p, should be: %p",
+			     tmp_node, NODE_ADDRESS);
+			errors++;
+		}
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+		const knot_node_t *tmp_node;
+		if ((tmp_node = knot_dname_node(dnames_non_fqdn[i], 0)) !=
+		    NODE_ADDRESS) {
+			diag("Got bad node value from structure: "
+			     "%s, should be: %s",
+			     tmp_node, NODE_ADDRESS);
+			errors++;
+		}
+	}
+
+	return errors;
+}
+
+static int test_dname_getters(uint type)
+{
+	int errors = 0;
+
+	knot_dname_t *dnames_fqdn[TEST_DOMAINS_OK];
+	knot_dname_t *dnames_non_fqdn[TEST_DOMAINS_NON_FQDN];
+
+	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		dnames_fqdn[i] = knot_dname_new_from_wire(
+		                (uint8_t *)test_domains_ok[i].wire,
+		                test_domains_ok[i].size, NODE_ADDRESS);
+		assert(dnames_fqdn[i] != NULL);
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+		printf("Creating dname: %s size: %d\n", test_domains_non_fqdn[i].wire, test_domains_non_fqdn[i].size);
+		dnames_non_fqdn[i] = knot_dname_new_from_str(
+		                test_domains_non_fqdn[i].str,
+		                test_domains_non_fqdn[i].size, NODE_ADDRESS);
+		assert(dnames_non_fqdn[i] != NULL);
+	}
+
+	switch (type) {
+		case 0: {
+			errors += test_dname_name(dnames_fqdn, dnames_non_fqdn);
+			break;
+		}
+
+		case 1: {
+			errors += test_dname_size(dnames_fqdn, dnames_non_fqdn);
+			break;
+		}
+
+		case 2: {
+			errors += test_dname_node(dnames_fqdn, dnames_non_fqdn);
+			break;
+		}
+	} /* switch */
+
+	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+		knot_dname_free(&dnames_fqdn[i]);
+	}
+
+	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+		knot_dname_free(&dnames_non_fqdn[i]);
+	}
+	
+	return (errors == 0);
+}
+
+static const int KNOT_DNAME_TEST_COUNT = 15;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_dname_tests_count(int argc, char *argv[])
+{
+	return KNOT_DNAME_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_dname_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_str = 0,
+	    res_wire = 0,
+	    res_str_non_fqdn = 0,
+	    res_final = 1;
+
+	res = test_dname_create();
+	ok(res, "dname: create empty");
+	res_final *= res;
+
+	skip(!res, 12);
+
+	todo();
+
+	ok((res = test_dname_delete()), "dname: delete");
+	//res_final *= res;
+
+	endtodo;
+
+	ok((res_str = test_dname_create_from_str()), "dname: create from str");
+	ok((res_wire = test_dname_create_from_wire()),
+	   "dname: create from wire");
+	ok((res_str_non_fqdn = test_dname_create_from_str_non_fqdn()),
+	   "dname: create from str non fqdn");
+	res_final *= res_str;
+	res_final *= res_wire;
+	res_final *= res_str_non_fqdn;
+
+	todo();
+	res = test_dname_getters(0);
+	ok(res, "dname: name");
+	endtodo;
+
+	todo();
+	res = test_dname_getters(1);
+	ok(res, "dname: size");
+	endtodo;
+
+	res = test_dname_getters(2);
+	ok(res, "dname: node");
+
+	skip(!res_str || !res_wire || !res_str_non_fqdn, 2);
+
+	ok((res = test_dname_to_str()), "dname: convert to str");
+	res_final *= res;
+
+	lives_ok(test_faulty_data(); , "dname: faulty data test");
+
+	endskip;  /* !res_str || !res_wire */
+
+        ok((res = test_dname_compare()), "dname: compare");
+        res_final *= res;
+
+	ok((res = test_dname_cat()), "dname: cat");
+	res_final *= res;
+
+	ok((res = test_dname_is_fqdn()), "dname: fqdn");
+	res_final *= res;
+
+	ok((res = test_dname_left_chop()), "dname: left chop");
+	res_final *= res;
+
+	ok((res = test_dname_is_subdomain()), "dname: is subdomain");
+	res_final *= res;
+
+	endskip;  /* create failed */
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/dname_tests.h b/src/tests/libknot/libknot/dname_tests.h
new file mode 100644
index 0000000..a7d75aa
--- /dev/null
+++ b/src/tests/libknot/libknot/dname_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_DNAME_TESTS_H_
+#define _KNOTD_DNAME_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api dname_tests_api;
+
+#endif /* _KNOTD_DNAME_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/edns_tests.c b/src/tests/libknot/libknot/edns_tests.c
new file mode 100644
index 0000000..ac5d130
--- /dev/null
+++ b/src/tests/libknot/libknot/edns_tests.c
@@ -0,0 +1,596 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/libknot/edns_tests.h"
+#include "libknot/common.h"
+#include "libknot/edns.h"
+
+static int knot_edns_tests_count(int argc, char *argv[]);
+static int knot_edns_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api edns_tests_api = {
+	"DNS library - EDNS",      //! Unit name
+	&knot_edns_tests_count,  //! Count scheduled tests
+	&knot_edns_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+enum { TEST_EDNS = 1, OPTION_COUNT = 3 };
+
+struct test_edns_options {
+	uint16_t code;
+	uint16_t length;
+	uint8_t *data;
+};
+
+struct test_edns {
+	struct test_edns_options *options;
+	uint16_t payload;
+	uint8_t ext_rcode;
+	uint8_t version;
+	uint16_t flags;
+	short option_count;
+	short options_max;
+	short size;
+};
+
+typedef struct test_edns test_edns_t;
+
+struct test_edns_options test_options_data[OPTION_COUNT] = {
+	{5, 7, (uint8_t *)"123456"},
+	{4, 3, (uint8_t *)"12"},
+	{1, 5, (uint8_t *)"13333"}
+};
+
+test_edns_t test_edns_data[TEST_EDNS] = {
+{ NULL, 4096, 2, 0, 0, 0, 10, 11}
+};
+
+enum edns_mask {
+	KNOT_EDNS_DO_MASK = (uint16_t)0x8000
+};
+
+/* Creates actual knot_opt_rr_t variable from test_edns_t variable */
+static knot_opt_rr_t *opt_rr_from_test_edns(test_edns_t *test_edns)
+{
+	knot_opt_rr_t *ret = knot_edns_new();
+
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	ret->flags = test_edns->flags;
+	ret->ext_rcode = test_edns->ext_rcode;
+	ret->payload = test_edns->payload;
+	ret->version = test_edns->version;
+
+	for (int i = 0; i < test_edns->option_count; i++) {
+		if (knot_edns_add_option(ret, test_edns->options[i].code,
+					   test_edns->options[i].length,
+					   test_edns->options[i].data) != 0) {
+			knot_edns_free(&ret);
+			return NULL;
+		}
+	}
+
+	return ret;
+}
+
+/* simple wire compare - 0 if same, 1 otherwise */
+static int edns_compare_wires(uint8_t *wire1,
+			      uint8_t *wire2,
+			      uint16_t length)
+{
+	for (uint i = 0; i < length; i++) {
+		if (wire1[i] != wire2[i]) {
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static int check_edns(const knot_opt_rr_t *edns,
+		      const test_edns_t *test_edns)
+{
+	if (edns->option_count != test_edns->option_count) {
+		diag("Option count is wrong");
+		return -1;
+	}
+
+	for (int i = 0; i < edns->option_count; i++) {
+		/* check options */
+		if (edns->options[i].code != test_edns->options[i].code) {
+			diag("Code in options is wrong");
+			return -1;
+		}
+
+		if (edns->options[i].length != test_edns->options[i].length) {
+			diag("Length in options is wrong");
+			return -1;
+		}
+
+		if (edns_compare_wires(edns->options[i].data,
+				       test_edns->options[i].data,
+				       edns->options[i].length) != 0)  {
+			diag("Data in options are wrong");
+			return -1;
+		}
+	}
+
+	if (edns->version != test_edns->version) {
+		diag("Version is wrong");
+		return -1;
+	}
+
+	if (edns->flags != test_edns->flags) {
+		diag("Flags are wrong");
+		return -1;
+	}
+
+	if (edns->size != test_edns->size) {
+		diag("Size is wrong");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int test_edns_get_payload(const knot_opt_rr_t *edns,
+				 test_edns_t *test_edns)
+{
+	if (knot_edns_get_payload(edns) !=
+	    test_edns->payload) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_get_ext_rcode(const knot_opt_rr_t *edns,
+				   test_edns_t *test_edns)
+{
+	if (knot_edns_get_ext_rcode(edns) !=
+	    test_edns->ext_rcode) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_get_flags(const knot_opt_rr_t *edns,
+			       test_edns_t *test_edns)
+{
+	if (knot_edns_get_flags(edns) !=
+	    test_edns->flags) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_get_version(const knot_opt_rr_t *edns,
+				 test_edns_t *test_edns)
+{
+	if (knot_edns_get_version(edns) !=
+	    test_edns->version) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_do(const knot_opt_rr_t *edns,
+			test_edns_t *test_edns)
+{
+	if (knot_edns_do(edns) !=
+	    (test_edns->flags & KNOT_EDNS_DO_MASK)) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_size(knot_opt_rr_t *edns, test_edns_t *test_edns)
+{
+	if (knot_edns_size(edns) !=
+	    test_edns->size) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_set_payload(knot_opt_rr_t *edns,
+				 test_edns_t *test_edns)
+{
+	knot_edns_set_payload(edns, test_edns->payload);
+
+	if (edns->payload !=
+	    test_edns->payload) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_set_ext_rcode(knot_opt_rr_t *edns,
+				   test_edns_t *test_edns)
+{
+	knot_edns_set_ext_rcode(edns, test_edns->ext_rcode);
+	if (edns->ext_rcode !=
+	    test_edns->ext_rcode) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_set_version(knot_opt_rr_t *edns,
+				 test_edns_t *test_edns)
+{
+	knot_edns_set_version(edns,
+				test_edns->version);
+
+	if (edns->version !=
+	    test_edns->version) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_set_do(knot_opt_rr_t *edns)
+{
+	knot_edns_set_do(edns);
+
+	if (!knot_edns_do(edns)) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static int test_edns_getters(uint type)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_EDNS; i++) {
+		knot_opt_rr_t *edns =
+			opt_rr_from_test_edns(&(test_edns_data[i]));
+		if (edns == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+
+		switch(type) {
+		case 0:
+			if (test_edns_get_payload(edns,
+						  &test_edns_data[i]) != 1) {
+				diag("Got wrong payload!");
+				errors++;
+			}
+			break;
+		case 1:
+			if (test_edns_get_ext_rcode(edns,
+						    &test_edns_data[i]) != 1) {
+				diag("Got wrong extended RCODE!");
+				errors++;
+			}
+			break;
+		case 2:
+			if (test_edns_get_flags(edns,
+						&test_edns_data[i]) != 1) {
+				diag("Got wrong flags!");
+
+				errors++;
+			}
+			break;
+		case 3:
+			if (test_edns_get_version(edns,
+						  &test_edns_data[i]) != 1) {
+				diag("Got wrong version!");
+				errors++;
+			}
+			break;
+		case 4:
+			if (test_edns_do(edns,
+					 &test_edns_data[i]) != 1) {
+				diag("Got wrong DO bit!");
+				errors++;
+			}
+			break;
+		case 5:
+			if (test_edns_size(edns,
+					   &test_edns_data[i]) != 1) {
+				diag("Got wrong size!");
+				errors++;
+			}
+			break;
+		default:
+			diag("Unknown option");
+			errors++;
+		} /* switch */
+
+		knot_edns_free(&edns);
+	}
+
+	return (errors == 0);
+}
+
+static int test_edns_setters(uint type)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_EDNS; i++) {
+		knot_opt_rr_t *edns =
+			opt_rr_from_test_edns(&(test_edns_data[i]));
+		if (edns == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+
+		switch(type) {
+		case 0:
+			if (test_edns_set_payload(edns,
+						  &test_edns_data[i]) != 1) {
+				diag("Set wrong payload!");
+				errors++;
+			}
+			break;
+		case 1:
+			if (test_edns_set_ext_rcode(edns,
+						    &test_edns_data[i]) != 1) {
+				diag("Set wrong ext_rcode");
+				errors++;
+			}
+			break;
+		case 2:
+			if (test_edns_set_version(edns,
+						  &test_edns_data[i]) != 1) {
+				diag("Set wrong version!");
+				errors++;
+			}
+			break;
+		case 3:
+			if (test_edns_set_do(edns) != 1) {
+				diag("Set wrong DO bit!");
+				errors++;
+			}
+			break;
+		default:
+			diag("Unknown option");
+			errors++;
+		} /* switch */
+
+		knot_edns_free(&edns);
+	}
+
+	return (errors == 0);
+}
+
+static int test_edns_wire()
+{
+	/*
+	 * Tests to_wire and from_wire in one test.
+	 */
+	for (int i = 0; i < TEST_EDNS; i++) {
+		/* Creates instance from test_edns_t. */
+		knot_opt_rr_t *edns =
+			opt_rr_from_test_edns(&(test_edns_data[i]));
+		if (edns == NULL) {
+			ERR_ALLOC_FAILED;
+			return -1;
+		}
+
+		uint8_t *wire = NULL;
+		wire = malloc(sizeof(uint8_t) * edns->size);
+		CHECK_ALLOC_LOG(wire, 0);
+
+		/* Converts EDNS to wire. */
+		short wire_size = knot_edns_to_wire(edns, wire, 100);
+
+		if (wire_size == -1) {
+			diag("Could not create EDNS wire");
+			return 0;
+		}
+
+		knot_opt_rr_t *edns_from_wire = knot_edns_new();
+		if (edns == NULL) {
+			return 0;
+		}
+
+		/* TODO use some constant */
+		/* Creates new EDNS from wire */
+		if (knot_edns_new_from_wire(edns_from_wire,
+					      wire,
+					      100) <= 0) {
+			diag("Could not create from wire");
+			return 0;
+		}
+
+		/* Checks whether EDNS created from wire is the same */
+		if (check_edns(edns_from_wire,
+			      &(test_edns_data[i])) != 0) {
+			diag("EDNS created from wire is different from the "
+			     "original one");
+		}
+
+		free(wire);
+		knot_edns_free(&edns_from_wire);
+		knot_edns_free(&edns);
+	}
+	return 1;
+}
+
+static int test_edns_add_option()
+{
+	/*
+	 * Create empty EDNS and add options one by one, testing their presence.
+	 */
+	for (int i = 0; i < TEST_EDNS; i++) {
+		knot_opt_rr_t *edns = knot_edns_new();
+		assert(edns->option_count == 0);
+
+		if (edns == NULL) {
+			ERR_ALLOC_FAILED;
+			return 0;
+		}
+
+		for (int j = 0; j < test_edns_data[i].option_count; j++) {
+			if (knot_edns_add_option(edns,
+					   test_edns_data[i].options[j].code,
+					   test_edns_data[i].options[j].length,
+					   test_edns_data[i].options[j].
+					   data) != 0) {
+				diag("Could not add option");
+				return 0;
+			}
+
+			if (edns->options[j].code !=
+			    test_edns_data[i].options[j].code) {
+				diag("Option code wrongly added!");
+				return 0;
+			}
+
+			if (edns->options[j].length !=
+			    test_edns_data[i].options[j].length) {
+				diag("Option length wrongly added!");
+				return 0;
+			}
+
+			if (edns_compare_wires(edns->options[j].data,
+					       test_edns_data[i].
+					       options[j].data,
+					       edns->options[j].length) != 0) {
+				diag("Option wire wrongly added!");
+				return 0;
+			}
+		}
+		knot_edns_free(&edns);
+	}
+	return 1;
+}
+
+static int test_edns_has_option()
+{
+	/*
+	 * Create empty EDNS and add options one by one, testing their presence
+	 */
+	for (int i = 0; i < TEST_EDNS; i++) {
+		knot_opt_rr_t *edns = knot_edns_new();
+		assert(edns->option_count == 0);
+
+		if (edns == NULL) {
+			ERR_ALLOC_FAILED;
+			return 0;
+		}
+
+		for (int j = 0; j < test_edns_data[i].option_count; j++) {
+			if (knot_edns_add_option(edns,
+					   test_edns_data[i].options[j].code,
+					   test_edns_data[i].options[j].length,
+					   test_edns_data[i].options[j].
+					   data) != 0) {
+				diag("Could not add option");
+				return 0;
+			}
+
+			if (knot_edns_has_option(edns,
+				   test_edns_data[i].options[j].code) != 1) {
+				diag("Option not found!");
+				return 0;
+			}
+		}
+		knot_edns_free(&edns);
+	}
+	return 1;
+}
+
+static const int KNOT_EDNS_TESTS_COUNT = 12;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_edns_tests_count(int argc, char *argv[])
+{
+	return KNOT_EDNS_TESTS_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_edns_tests_run(int argc, char *argv[])
+{
+	int res = 0;
+	int res_final = 1;
+
+	res = test_edns_getters(0);
+	ok(res, "ends: get payload");
+	res_final *= res;
+
+	res = test_edns_getters(1);
+	ok(res, "ends: get extenden RCODE");
+	res_final *= res;
+
+	res = test_edns_getters(2);
+	ok(res, "ends: get flags");
+	res_final *= res;
+
+	res = test_edns_getters(3);
+	ok(res, "ends: get version");
+	res_final *= res;
+
+	res = test_edns_getters(4);
+	ok(res, "ends: do");
+	res_final *= res;
+
+	res = test_edns_getters(5);
+	ok(res, "ends: size");
+	res_final *= res;
+
+	res = test_edns_setters(0);
+	ok(res, "ends: set payload");
+	res_final *= res;
+
+	res = test_edns_setters(1);
+	ok(res, "ends: set extended RCODE");
+	res_final *= res;
+
+	res = test_edns_setters(2);
+	ok(res, "ends: set version");
+	res_final *= res;
+
+	res = test_edns_setters(3);
+	ok(res, "ends: set DO");
+	res_final *= res;
+
+	res = test_edns_add_option();
+	ok(res, "ends: add option");
+	res_final *= res;
+
+	res = test_edns_has_option();
+	ok(res, "ends: has option");
+	res_final *= res;
+
+	res = test_edns_wire();
+	ok(res, "ends: to_wire and from_wire");
+	res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/edns_tests.h b/src/tests/libknot/libknot/edns_tests.h
new file mode 100644
index 0000000..4553234
--- /dev/null
+++ b/src/tests/libknot/libknot/edns_tests.h
@@ -0,0 +1,34 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file edns_tests.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * Contains unit tests for ENDS API
+ *
+ * Contains tests for:
+ * - ENDS API
+ */
+#ifndef _KNOTD__EDNS_TESTS_H_
+#define _KNOTD__EDNS_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api edns_tests_api;
+
+#endif /* _KNOTD__EDNS_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/node_tests.c b/src/tests/libknot/libknot/node_tests.c
new file mode 100644
index 0000000..f04a202
--- /dev/null
+++ b/src/tests/libknot/libknot/node_tests.c
@@ -0,0 +1,344 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tests/libknot/libknot/node_tests.h"
+#include "libknot/dname.h"
+#include "libknot/zone/node.h"
+#include "libknot/util/descriptor.h"
+
+static int knot_node_tests_count(int argc, char *argv[]);
+static int knot_node_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api node_tests_api = {
+	"DNS library - node",       //! Unit name
+	&knot_node_tests_count,  //! Count scheduled tests
+	&knot_node_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+// C will not accept const int in other const definition
+enum { TEST_NODES = 2, RRSETS = 5};
+
+struct test_node {
+	knot_dname_t owner;
+	knot_node_t *parent;
+	uint size;
+};
+
+static knot_dname_t test_dnames[TEST_NODES] = {
+	{{}, (uint8_t *)"\3www\7example\3com", 17},
+	{{}, (uint8_t *)"\3www\7example\3com", 17}
+};
+
+static struct test_node	test_nodes[TEST_NODES] = {
+	{{{}, (uint8_t *)"\3com", 4}, (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\3www\7example\3com", 17}, (knot_node_t *)NULL}
+};
+
+static knot_rrset_t rrsets[RRSETS] = {
+	{&test_dnames[0], 1, 1, 3600, NULL, NULL},
+	{&test_dnames[1], 2, 1, 3600, NULL, NULL},
+	{&test_dnames[1], 7, 1, 3600, NULL, NULL},
+	{&test_dnames[1], 3, 1, 3600, NULL, NULL},
+	{&test_dnames[1], 9, 1, 3600, NULL, NULL}
+};
+
+static int test_node_create()
+{
+	/* Tests creation of node by comparing with test_node struct */
+	knot_node_t *tmp;
+	int errors = 0;
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		tmp = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+		if (tmp == NULL ||
+		    tmp->owner != &test_nodes[i].owner ||
+		    tmp->parent != test_nodes[i].parent ||
+		    tmp->rrset_tree == NULL) {
+			errors++;
+			diag("Failed to create node structure");
+		}
+		knot_node_free(&tmp, 0, 0);
+	}
+	return (errors == 0);
+}
+
+static int test_node_add_rrset()
+{
+	knot_node_t *tmp;
+	knot_rrset_t *rrset;
+	int errors = 0;
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		/* create node from test_node structure */
+		tmp = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+		rrset = &rrsets[i];
+		if (knot_node_add_rrset(tmp, rrset, 0) < 0) {
+			errors++;
+			diag("Failed to insert rrset into node");
+		}
+
+		/* check if rrset is really there */
+
+		const knot_rrset_t *rrset_from_node = NULL;
+		if ((rrset_from_node =
+			     knot_node_rrset(tmp, rrset->type)) == NULL) {
+			errors++;
+			diag("Inserted rrset could not be found");
+			continue;
+		}
+
+		/* compare rrset from node with original rrset */
+
+		const knot_rrtype_descriptor_t *desc =
+			knot_rrtype_descriptor_by_type(rrset->type);
+
+		int cmp = 0;
+
+		if ((rrset_from_node->rdata == NULL) &&
+		    (rrset->rdata == NULL)) {
+			cmp = 0;
+		} else if ((rrset_from_node->rdata != NULL) &&
+			   (rrset->rdata != NULL)) {
+			cmp = knot_rdata_compare(rrset_from_node->rdata,
+						   rrset->rdata,
+						   desc->wireformat);
+		} else { /* one is not NULL and other is -> error */
+			cmp = 1;
+		}
+
+		if (!((rrset_from_node->type == rrset->type) &&
+		    (rrset_from_node->rclass == rrset->rclass) &&
+		    (rrset_from_node->ttl == rrset->ttl) &&
+		    (rrset_from_node->rrsigs == rrset->rrsigs) &&
+		     (cmp == 0))) {
+			errors++;
+			diag("Values in found rrset are wrong");
+		}
+
+		knot_node_free(&tmp, 0, 0);
+	}
+
+	return (errors == 0);
+}
+
+static int test_node_get_rrset()
+{
+	knot_node_t *tmp;
+	knot_rrset_t *rrset;
+	int errors = 0;
+
+	knot_node_t *nodes[TEST_NODES];
+
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		tmp = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+		nodes[i] = tmp;
+		for (int j = 0; j < RRSETS; j++) {
+			knot_node_add_rrset(tmp, &rrsets[j], 0);
+		}
+	}
+
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		for (int j = 0; j < RRSETS; j++) {
+			rrset = &rrsets[j];
+			if (knot_node_rrset(nodes[i], rrset->type)
+			    != rrset) {
+				errors++;
+				diag("Failed to get proper rrset from node");
+			}
+		}
+		knot_node_free(&nodes[i], 0, 0);
+	}
+
+	return (errors == 0);
+}
+
+static int test_node_get_parent()
+{
+	knot_node_t *tmp;
+	knot_rrset_t *rrset;
+	int errors = 0;
+
+	knot_node_t *nodes[TEST_NODES];
+
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		tmp = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+		nodes[i] = tmp;
+		rrset = &rrsets[i];
+		knot_node_add_rrset(tmp, rrset, 0);
+	}
+
+	for (int i = 0; i < TEST_NODES && !errors; i++) {
+		rrset = &rrsets[i];
+		if (knot_node_parent(nodes[i], 0) != test_nodes[i].parent) {
+			errors++;
+			diag("Failed to get proper parent from node");
+		}
+		knot_node_free(&nodes[i], 0, 0);
+	}
+	return (errors == 0);
+}
+
+static int test_node_sorting()
+{
+	knot_node_t *tmp;
+	knot_rrset_t *rrset;
+	int errors = 0;
+
+	tmp = knot_node_new(&test_nodes[0].owner, test_nodes[0].parent, 0);
+
+	/* Will add rrsets to node. */
+
+	for (int i = 0; i < RRSETS && !errors; i++) {
+		rrset = &rrsets[i];
+		knot_node_add_rrset(tmp, rrset, 0);
+	}
+
+//	const skip_node_t *node = skip_first(tmp->rrsets);
+
+//	int last = *((uint16_t *)node->key);
+
+//	/* TODO there is now an API function knot_node_rrsets ... */
+
+//	/* Iterates through skip list and checks, whether it is sorted. */
+
+//	while ((node = skip_next(node)) != NULL) {
+//		if (last > *((uint16_t *)node->key)) {
+//			errors++;
+//			diag("RRset sorting error");
+//		}
+//		last = *((uint16_t *)node->key);
+//	}
+
+	knot_node_free(&tmp, 0, 0);
+	return (errors == 0);
+}
+
+static int test_node_delete()
+{
+	int errors = 0;
+
+	knot_node_t *tmp_node;
+
+	for (int i = 0; i < TEST_NODES; i++) {
+		tmp_node = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+
+		knot_node_free(&tmp_node, 0, 0);
+
+		errors += (tmp_node != NULL);
+	}
+
+	return (errors == 0);
+}
+
+static int test_node_set_parent()
+{
+	knot_node_t *tmp_parent = knot_node_new(NULL, NULL, 0);
+	int errors = 0;
+
+	knot_node_t *tmp_node;
+
+	for (int i = 0; i < TEST_NODES; i++) {
+		tmp_node = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+
+		knot_node_set_parent(tmp_node, tmp_parent);
+
+		if (tmp_node->parent != tmp_node->parent) {
+			diag("Parent node is wrongly set.");
+			errors++;
+		}
+		knot_node_free(&tmp_node, 0, 0);
+	}
+	knot_node_free(&tmp_parent, 0, 0);
+	return (errors == 0);
+}
+
+static int test_node_free_rrsets()
+{
+	int errors = 0;
+
+	knot_node_t *tmp_node;
+
+	for (int i = 0; i < TEST_NODES; i++) {
+		tmp_node = knot_node_new(&test_nodes[i].owner,
+				      test_nodes[i].parent, 0);
+
+		knot_node_free_rrsets(tmp_node, 0);
+
+//		errors += (tmp_node->rrsets != NULL);
+
+		knot_node_free(&tmp_node, 0, 0);
+	}
+	return (errors == 0);
+}
+
+static const int KNOT_NODE_TEST_COUNT = 8;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_node_tests_count(int argc, char *argv[])
+{
+	return KNOT_NODE_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_node_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_final = 1;
+
+	res = test_node_create();
+	ok(res, "node: create");
+	res_final *= res;
+
+	skip(!res, 6)
+
+	ok((res = test_node_add_rrset()), "node: add");
+	res_final *= res;
+
+	ok((res = test_node_get_rrset()), "node: get");
+	res_final *= res;
+
+	ok((res = test_node_get_parent()), "node: get parent");
+	res_final *= res;
+
+	ok((res = test_node_set_parent()), "node: set parent");
+	res_final *= res;
+
+	ok((res = test_node_sorting()), "node: sort");
+	res_final *= res;
+
+	ok((res = test_node_free_rrsets()), "node: free rrsets");
+	res_final *= res;
+
+	endskip;
+
+	ok((res = test_node_delete()), "node: delete");
+	//res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/node_tests.h b/src/tests/libknot/libknot/node_tests.h
new file mode 100644
index 0000000..a90179f
--- /dev/null
+++ b/src/tests/libknot/libknot/node_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_NODE_TESTS_H_
+#define _KNOTD_NODE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api node_tests_api;
+
+#endif /* _KNOTD_NODE_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/nsec3_tests.c b/src/tests/libknot/libknot/nsec3_tests.c
new file mode 100644
index 0000000..7b95549
--- /dev/null
+++ b/src/tests/libknot/libknot/nsec3_tests.c
@@ -0,0 +1,252 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+
+#include "libknot/common.h"
+#include "libknot/util/error.h"
+#include "libknot/nsec3.h"
+#include "libknot/util/utils.h"
+#include "common/base32hex.h"
+#include "nsec3_tests.h"
+
+#ifdef TEST_WITH_LDNS
+#include "ldns/ldns.h"
+#endif
+
+static int knot_nsec3_tests_count(int argc, char *argv[]);
+static int knot_nsec3_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api nsec3_tests_api = {
+	"NSEC3",      //! Unit name
+	&knot_nsec3_tests_count,  //! Count scheduled tests
+	&knot_nsec3_tests_run     //! Run scheduled tests
+};
+
+extern int compare_wires_simple(uint8_t *w1, uint8_t *w2, uint count);
+
+static int test_nsec3_params_from_wire()
+{
+	/* Create sample NSEC3PARAM rdata */
+	knot_rdata_item_t items[4];
+	knot_rdata_t *rdata = knot_rdata_new();
+	rdata->items = items;
+	rdata->count = 4;
+	knot_rdata_item_set_raw_data(rdata, 0, (uint16_t *)"\x1\x0\x1");
+	knot_rdata_item_set_raw_data(rdata, 1, (uint16_t *)"\x1\x0\x0");
+	knot_rdata_item_set_raw_data(rdata, 2, (uint16_t *)"\x2\x0\x0\x64");
+	knot_rdata_item_set_raw_data(rdata, 3,
+	(uint16_t *)"\xF\x0\xE\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF");
+
+	knot_rrset_t *rrset =
+		knot_rrset_new(knot_dname_new_from_str("cz.",
+		                 strlen("cz."), NULL),
+	                         KNOT_RRTYPE_NSEC3PARAM,
+	                         KNOT_CLASS_IN,
+	                         3600);
+	assert(rrset);
+	int ret = knot_rrset_add_rdata(rrset, rdata);
+	assert(ret == KNOT_EOK);
+
+	knot_nsec3_params_t nsec3_test_params;
+
+	int errors = 0;
+	int lived = 0;
+	lives_ok({
+		/* Create special variable for this block. */
+		if (knot_nsec3_params_from_wire(NULL, NULL) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_nsec3_params_from_wire(&nsec3_test_params, NULL) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_nsec3_params_from_wire(NULL, rrset) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+
+	}, "nsec3 params from wire NULL tests");
+	errors += lived != 1;
+
+	if (knot_nsec3_params_from_wire(&nsec3_test_params,
+	                                rrset) != KNOT_EOK) {
+		diag("Could not convert nsec3 params to wire!");
+		return 0;
+	}
+
+	if (nsec3_test_params.algorithm != 1) {
+		diag("Algorithm error");
+		errors++;
+	}
+
+	if (nsec3_test_params.flags != 0) {
+		diag("Flags error %d", nsec3_test_params.flags);
+		errors++;
+	}
+
+	if (nsec3_test_params.iterations != 100) {
+		diag("Iterations error %d", nsec3_test_params.iterations);
+		errors++;
+	}
+		printf("salt length: %d\n", nsec3_test_params.salt_length);
+
+	if (nsec3_test_params.salt_length != 14) {
+		diag("Salt length error %d", nsec3_test_params.salt_length);
+		return 0;
+	}
+
+	if (compare_wires_simple((uint8_t *)nsec3_test_params.salt,
+		(uint8_t *)"\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF\xF",
+		14) != 0) {
+		diag("Salt wire error");
+		errors++;
+	}
+
+	knot_rrset_free(&rrset);
+	return (errors == 0);
+}
+
+static int test_nsec3_sha1()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_nsec3_params_t nsec3_test_params;
+
+	lives_ok({
+		if (knot_nsec3_sha1(NULL, NULL, 1, NULL, NULL) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_nsec3_sha1(&nsec3_test_params,
+	                              NULL, 1, NULL, NULL) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+		uint8_t data[20];
+		lived = 1;
+		lived = 0;
+		if (knot_nsec3_sha1(&nsec3_test_params,
+	                              data, 20, NULL, NULL) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+		uint8_t *digest = NULL;
+		lived = 1;
+		lived = 0;
+		if (knot_nsec3_sha1(&nsec3_test_params,
+	                              data, 20, &digest, NULL) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+//		size_t size = 0;
+//		lived = 1;
+//		lived = 0;
+//		if (knot_nsec3_sha1(&nsec3_test_params,
+//	                              data, 20, &digest, &size) !=
+//	            KNOT_EBADARG) {
+//			errors++;
+//		}
+		lived = 1;
+	}, "NSEC3: nsec3 sha1 NULL tests");
+	if (errors) {
+		diag("Does not return KNOT_EBADARG after "
+		     "execution with wrong arguments!");
+	}
+
+	errors += lived != 1;
+
+	uint8_t *digest = NULL;
+	size_t digest_size = 0;
+	if (knot_nsec3_sha1(&nsec3_test_params,
+	                      (uint8_t *)"\2ns\3nic\2cz",
+	                      strlen("\2ns\3nic\2cz"), &digest,
+	                      &digest_size) != KNOT_EOK) {
+		diag("Could not hash name!");
+		return 0;
+	}
+
+#ifdef TEST_WITH_LDNS
+	ldns_rdf *name = ldns_dname_new_frm_str("ns.nic.cz.");
+	assert(name);
+	ldns_rdf *hashed_name = ldns_nsec3_hash_name(name,
+	                                          nsec3_test_params.algorithm,
+	                                          nsec3_test_params.iterations,
+	                                          nsec3_test_params.salt_length,
+	                                          nsec3_test_params.salt);
+	assert(hashed_name);
+//	knot_dname_t *dname_from_ldns =
+//		knot_dname_new_from_wire(ldns_rdf_data(hashed_name),
+//	                                   ldns_rdf_size(hashed_name),
+//	                                   NULL);
+
+	char *name_b32 = NULL;
+	size_t size_b32 = base32hex_encode_alloc((char *)digest, digest_size,
+	                                     &name_b32);
+
+//	hex_print(name_b32, size_b32);
+//	hex_print(ldns_rdf_data(hashed_name), ldns_rdf_size(hashed_name));
+	if (ldns_rdf_size(hashed_name) != size_b32) {
+		diag("Wrong hashed name length! Should be: %d is: %d",
+		     ldns_rdf_size(hashed_name), size_b32);
+		return 0;
+	}
+
+	if (compare_wires_simple(ldns_rdf_data(hashed_name),
+	                         (uint8_t *)name_b32, size_b32) != 0) {
+		diag("Wrong hashed name wire!");
+		errors++;
+	}
+#endif
+
+#ifndef TEST_WITH_LDNS
+	diag("Warning: without ldns this test is only partial!");
+#endif
+	return (errors == 0);
+}
+
+static const int KNOT_NSEC3_TESTS_COUNT = 2;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_nsec3_tests_count(int argc, char *argv[])
+{
+	return KNOT_NSEC3_TESTS_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_nsec3_tests_run(int argc, char *argv[])
+{
+	ok(test_nsec3_params_from_wire(), "nsec3: params from wire");
+	ok(test_nsec3_sha1(), "nsec3: sha1");
+	return 1;
+}
diff --git a/src/tests/libknot/libknot/nsec3_tests.h b/src/tests/libknot/libknot/nsec3_tests.h
new file mode 100644
index 0000000..10e7ed9
--- /dev/null
+++ b/src/tests/libknot/libknot/nsec3_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_NSEC3_TESTS_H_
+#define _KNOTD_NSEC3_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api nsec3_tests_api;
+
+#endif /* _KNOTD_NSEC3_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/packet_tests.c b/src/tests/libknot/libknot/packet_tests.c
new file mode 100644
index 0000000..185504f
--- /dev/null
+++ b/src/tests/libknot/libknot/packet_tests.c
@@ -0,0 +1,430 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include "packet_tests.h"
+#include "libknot/util/error.h"
+#include "libknot/packet/packet.h"
+#include "libknot/util/wire.h"
+/* *test_t structures */
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+
+static int packet_tests_count(int argc, char *argv[]);
+static int packet_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api packet_tests_api = {
+	"packet",     //! Unit name
+	&packet_tests_count,  //! Count scheduled tests
+	&packet_tests_run     //! Run scheduled tests
+};
+
+static int test_packet_new()
+{
+	int errors = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	if (packet == NULL) {
+		diag("Could not create packet using prealloc_node constant!");
+		errors++;
+	}
+	knot_packet_free(&packet);
+
+	packet = knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	if (packet == NULL) {
+		diag("Could not create packet using prealloc_query constant!");
+		errors++;
+	}
+	knot_packet_free(&packet);
+
+	packet = knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	if (packet == NULL) {
+		diag("Could not create packet using prealloc_resp constant!");
+		errors++;
+	}
+	knot_packet_free(&packet);
+
+	/*!< \todo Should it create packet using any size? */
+
+	return (errors == 0);
+}
+
+static int test_packet_parse_from_wire()
+{
+	int errors = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+
+	int tmp = 0;
+	lives_ok({
+		if (knot_packet_parse_from_wire(NULL, NULL, 0, 0) !=
+		    KNOT_EBADARG) {
+			diag("Trying to parse NULL packet with NULL wire "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		tmp = 1;
+		tmp = 0;
+		if (knot_packet_parse_from_wire(packet, NULL, 0, 0) !=
+		    KNOT_EBADARG) {
+			diag("Trying to parse with NULL wire "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		tmp = 1;
+		tmp = 0;
+		if (knot_packet_parse_from_wire(packet, (uint8_t *)0xbeef,
+		                                  0, 0) !=
+		    KNOT_EFEWDATA) {
+			diag("Trying to parse 0 lengt"
+			     "did not return KNOT_EOK!");
+			errors++;
+		}
+		tmp = 1;
+	}, "packet: parse from wire NULL tests.");
+	errors += tmp != 1;
+
+	knot_packet_free(&packet);
+
+	return (errors == 0);
+}
+
+static int test_packet_parse_next_rr_answer()
+{
+	int errors = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+
+	int tmp = 0;
+	lives_ok({
+		int ret = 0;
+		if (knot_packet_parse_next_rr_answer(NULL, NULL) !=
+		    KNOT_EBADARG) {
+			diag("Trying to parse next RR answer with "
+			     "NULL packet with and NULL RRSet "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		tmp = 1;
+		tmp = 0;
+		if ((ret = knot_packet_parse_next_rr_answer(packet,
+		                                              NULL)) !=
+		    KNOT_EBADARG) {
+			diag("Trying to parse next RR with NULL RRSet pointer "
+			     "did not return KNOT_EBADARG! Got %d.",
+			     ret);
+			errors++;
+		}
+		tmp = 1;
+//		knot_rrset_t *rrset = (knot_rrset_t *)0xaaaa;
+//		tmp = 0;
+//		if (knot_packet_parse_next_rr_answer(packet,
+//		                                       &rrset) !=
+//		    KNOT_EBADARG) {
+//			diag("Trying to parse next RR answer with rrset pointer"
+//			     " not pointing to NULL did not "
+//			     "return KNOT_EBADARG!");
+//			errors++;
+//		}
+//		tmp = 1;
+	}, "packet: parse next rr answer NULL tests.");
+	errors += tmp != 1;
+
+	knot_packet_free(&packet);
+
+	return (errors == 0);
+}
+
+static int test_packet_parse_rest()
+{
+	int res = 0;
+	lives_ok({res = knot_packet_parse_rest(NULL);},
+	"packet: parse rest NULL test");
+
+	if (res != KNOT_EBADARG) {
+		diag("parse rest NULL did not return KNOT_EBADARG.\n");
+		return 1;
+	}
+
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	assert(packet);
+
+	todo();
+	lives_ok({res = knot_packet_parse_rest(packet);},
+	"packet: parser rest empty packet");
+	endtodo;
+
+	knot_packet_free(&packet);
+
+	return 1;
+}
+
+
+static int test_packet_set_max_size()
+{
+	int errors = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_NONE);
+	assert(packet);
+
+	int lived = 0;
+
+	lives_ok({
+		lived = 0;
+		if (knot_packet_set_max_size(NULL, 1) != KNOT_EBADARG) {
+			diag("Calling packet_set_max() with NULL packet "
+			     "did not return KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+	}, "packet: set max size NULL test");
+
+	errors += lived != 1;
+
+	if (knot_packet_set_max_size(packet, 0) != KNOT_EBADARG) {
+		diag("Calling packet_set_max() with size eqeal to 0 did not "
+		     "return KNOT_EBADARG");
+		errors++;
+	}
+
+	if (knot_packet_set_max_size(packet, 10) != KNOT_EOK) {
+		diag("Calling packet_set_max() with valid arguments did not "
+		     "return KNOT_EOK");
+		errors++;
+	}
+
+	knot_packet_free(&packet);
+
+	return (errors == 0);
+}
+
+static int test_packet_add_tmp_rrset()
+{
+	int errors = 0;
+	int lived = 0;
+
+	/* knot_packet_add_tmp_rrset only works with pointers. */
+	knot_rrset_t *rrset = (knot_rrset_t *)0xabcdef;
+
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+
+	lives_ok({
+		if (knot_packet_add_tmp_rrset(NULL, rrset) !=
+		    KNOT_EBADARG) {
+			diag("Trying to add to NULL packet did not return "
+			     "KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_packet_add_tmp_rrset(packet, NULL) !=
+		    KNOT_EBADARG) {
+			diag("Trying to add NULL rrset did not return "
+			     "KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_packet_add_tmp_rrset(NULL, NULL) !=
+		    KNOT_EBADARG) {
+			diag("Trying to add NULL rrset to NULL packet "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "packet: add tmp rrset NULL test");
+	errors += lived != 1;
+
+	if (knot_packet_add_tmp_rrset(packet, rrset) != KNOT_EOK) {
+		diag("Could not add valid RRSet to packet!");
+		errors++;
+	}
+
+	/* Not freeing because RRSet is fake. */
+//	knot_packet_free(&packet);
+
+	free(packet->wireformat);
+	free(packet);
+
+	return (errors == 0);
+}
+
+//static int test_packet_contains()
+//{
+//	int errors = 0;
+//	int lives = 0;
+
+//	knot_packet_t *packet =
+//		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+//	assert(packet);
+
+//	lives_ok({
+//		if (knot_packet_contains(packet, NULL,
+//		                           KNOT_RRSET_COMPARE_PTR) !=
+//		    KNOT_EBADARG{
+//			diag();
+//		}
+//	}, "packet: contains NULL tests);
+
+//	knot_packet_contains()
+
+//}
+
+static int test_packet_header_to_wire()
+{
+	int errors = 0;
+	int lived = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+	size_t size;
+
+	lives_ok({
+		knot_packet_header_to_wire(NULL, NULL, NULL);
+		lived = 1;
+		lived = 0;
+		knot_packet_header_to_wire(&packet->header, NULL, &size);
+		lived = 1;
+	}, "packet: header to wire NULL tests");
+	errors += lived != 1;
+
+	knot_packet_free(&packet);
+	return (errors == 0);
+}
+
+static int test_packet_question_to_wire()
+{
+	int errors = 0 ;
+	int lived = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+
+	lives_ok({
+		if (knot_packet_question_to_wire(NULL) != KNOT_EBADARG) {
+			diag("Calling packet_question_to_wire with "
+			     "NULL pointer did not result to KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "packet: question to wire NULL tests");
+	errors += lived != 1;
+
+	packet->size = KNOT_WIRE_HEADER_SIZE + 1;
+	if (knot_packet_question_to_wire(packet) != KNOT_ERROR) {
+		diag("Calling packet_question_to_wire with oversized packet "
+		     "did not return KNOT_ERROR!");
+		errors++;
+	}
+
+	knot_packet_free(&packet);
+	return (errors == 0);
+}
+
+static int test_packet_edns_to_wire()
+{
+	int errors = 0 ;
+	int lived = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+
+	lives_ok({
+		knot_packet_edns_to_wire(NULL);
+		lived = 1;
+	}, "packet: question to wire NULL tests");
+	errors += lived != 1;
+
+	knot_packet_free(&packet);
+	return (errors == 0);
+}
+
+static int test_packet_to_wire()
+{
+	int errors = 0 ;
+	int lived = 0;
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+
+	lives_ok({
+		if (knot_packet_to_wire(NULL, NULL, NULL) != KNOT_EBADARG) {
+			diag("Calling packet_to_wire with "
+			     "NULL pointers did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		size_t size;
+		lived = 0;
+		if (knot_packet_to_wire(packet, NULL, &size) !=
+		    KNOT_EBADARG) {
+			diag("Calling packet_to_wire with "
+			     "NULL wire did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		uint8_t *wire = (uint8_t *)0xabcdef;
+		lived = 0;
+		if (knot_packet_to_wire(packet, &wire, &size) !=
+		    KNOT_EBADARG) {
+			diag("Calling packet_to_wire with "
+			     "wire not pointing to NULL did not return"
+			     " KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "packet: to wire NULL tests");
+	errors += lived != 1;
+
+	knot_packet_free(&packet);
+	return (errors == 0);
+}
+
+static const uint KNOT_PACKET_TEST_COUNT = 21;
+
+static int packet_tests_count(int argc, char *argv[])
+{
+	return KNOT_PACKET_TEST_COUNT;
+}
+
+static int packet_tests_run(int argc, char *argv[])
+{
+	int res = 0;
+	ok(res = test_packet_new(), "packet: new");
+	skip(!res, 20);
+	ok(test_packet_parse_rest(), "packet: parse rest");
+	ok(test_packet_parse_from_wire(), "packet: parse from wire");
+	ok(test_packet_parse_next_rr_answer(), "packet: parse next rr answer");
+	ok(test_packet_set_max_size(), "packet: set max size");
+	ok(test_packet_add_tmp_rrset(), "packet: add tmp rrset");
+	ok(test_packet_header_to_wire(), "packet: header to wire");
+	ok(test_packet_question_to_wire(), "packet: header to wire");
+	ok(test_packet_edns_to_wire(), "packet: header to wire");
+	ok(test_packet_to_wire(), "packet: to wire");
+//	ok(res = test_packet_contains(), "Packet: contains");
+	endskip;
+	return 1;
+}
diff --git a/src/tests/libknot/libknot/packet_tests.h b/src/tests/libknot/libknot/packet_tests.h
new file mode 100644
index 0000000..5a8ce03
--- /dev/null
+++ b/src/tests/libknot/libknot/packet_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_PACKET_TESTS_H_
+#define _KNOTD_PACKET_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api packet_tests_api;
+
+#endif /* _KNOTD_PACKET_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/query_tests.c b/src/tests/libknot/libknot/query_tests.c
new file mode 100644
index 0000000..1e4e081
--- /dev/null
+++ b/src/tests/libknot/libknot/query_tests.c
@@ -0,0 +1,160 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include "packet_tests.h"
+#include "libknot/util/error.h"
+#include "libknot/packet/packet.h"
+#include "libknot/util/wire.h"
+#include "libknot/packet/query.h"
+/* *test_t structures */
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+
+static int query_tests_count(int argc, char *argv[]);
+static int query_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api query_tests_api = {
+	"query",     //! Unit name
+	&query_tests_count,  //! Count scheduled tests
+	&query_tests_run     //! Run scheduled tests
+};
+
+static const uint KNOT_QUERY_TEST_COUNT = 1;
+
+static int query_tests_count(int argc, char *argv[])
+{
+	return KNOT_QUERY_TEST_COUNT;
+}
+
+static int test_query_init()
+{
+	int errors = 0;
+	int lived = 0;
+	knot_packet_t *query =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	assert(query);
+	lives_ok({
+		if (knot_query_init(NULL) != KNOT_EBADARG) {
+			diag("Calling query_init with NULL query did "
+			     "not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "query: init NULL tests");
+	errors += lived != 1;
+
+	assert(knot_packet_set_max_size(query, 1024 * 10) == KNOT_EOK);
+	if (knot_query_init(query) != KNOT_EOK) {
+		diag("Calling query_init with valid query did not return "
+		     "KNOT_EOK!");
+		errors++;
+	}
+
+	if (!knot_packet_is_query(query)) {
+		diag("QR flag was not set!");
+		errors++;
+	}
+
+	return (errors == 0);
+}
+
+static int test_query_set_question()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_packet_t *query =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	assert(query);
+	assert(knot_packet_set_max_size(query, 1024 * 10) == KNOT_EOK);
+	knot_query_init(query);
+
+	knot_rrset_t *rrset =
+		knot_rrset_new(knot_dname_new_from_str("a.ns.cz.",
+	                                                   strlen("a.ns.cz."),
+	                                                   NULL),
+	                         KNOT_RRTYPE_A, KNOT_CLASS_IN, 3600);
+	assert(rrset);
+
+	knot_question_t *question = malloc(sizeof(knot_question_t));
+	assert(question);
+	question->qname = rrset->owner;
+	question->qtype = rrset->type;
+	question->qclass = rrset->rclass;
+
+	lives_ok({
+		if (knot_query_set_question(NULL, NULL) != KNOT_EBADARG) {
+			diag("Calling query_set_question with NULL");
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_query_set_question(query, NULL) != KNOT_EBADARG) {
+			diag("Calling query_set_question with NULL");
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_query_set_question(NULL, question) != KNOT_EBADARG) {
+			diag("Calling query_set_question with NULL");
+			errors++;
+		}
+		lived = 1;
+	}, "query: set question NULL tests");
+	errors += lived != 1;
+
+	if (knot_query_set_question(query, question) != KNOT_EOK) {
+		diag("Calling query_set_question with valid arguments ");
+		errors++;
+	}
+
+	if (query->question.qname != rrset->owner) {
+		diag("Qname was not set right!");
+		errors++;
+	}
+
+	if (query->question.qtype != rrset->type) {
+		diag("Qtype was not set right!");
+		errors++;
+	}
+
+	if (query->question.qclass != rrset->rclass) {
+		diag("Qclass was not set right!");
+		errors++;
+	}
+
+	if (query->header.qdcount != 1) {
+		diag("Qdcount was not set right!");
+		errors++;
+	}
+
+	knot_packet_free(&query);
+	knot_rrset_deep_free(&rrset, 1, 0, 0);
+
+	return (errors == 0);
+}
+
+static int query_tests_run(int argc, char *argv[])
+{
+	ok(test_query_init(), "query: init");
+	ok(test_query_set_question(), "query: set question");
+	return 1;
+}
diff --git a/src/tests/libknot/libknot/query_tests.h b/src/tests/libknot/libknot/query_tests.h
new file mode 100644
index 0000000..037ecab
--- /dev/null
+++ b/src/tests/libknot/libknot/query_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_QUERY_TESTS_H_
+#define _KNOTD_QUERY_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api query_tests_api;
+
+#endif /* _KNOTD_QUERY_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/rdata_tests.c b/src/tests/libknot/libknot/rdata_tests.c
new file mode 100644
index 0000000..561686a
--- /dev/null
+++ b/src/tests/libknot/libknot/rdata_tests.c
@@ -0,0 +1,954 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "tests/libknot/libknot/rdata_tests.h"
+#include "libknot/common.h"
+#include "libknot/rdata.h"
+#include "libknot/dname.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/util/utils.h"
+#include "libknot/util/error.h"
+
+enum { TEST_DOMAINS_OK = 8 };
+
+struct test_domain {
+	char *str;
+	char *wire;
+	uint size;
+	char *labels;
+	short label_count;
+};
+
+/*! \warning Do not change the order in those, if you want to test some other
+ *           feature with new dname, add it at the end of these arrays.
+ */
+static const struct test_domain
+		test_domains_ok[TEST_DOMAINS_OK] = {
+	{ "abc.test.domain.com.", "\3abc\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "xyz.test.domain.com.", "\3xyz\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "test.domain.com.", "\4test\6domain\3com", 17,
+	  "\x0\x5\xC", 3 },
+	{ ".", "\0", 1,
+	  "", 0 },
+	{ "foo.bar.net.", "\3foo\3bar\3net", 13,
+	  "\x0\x4\x8", 3},
+	{ "bar.net.", "\3bar\3net", 9,
+	  "\x0\x4", 2}
+};
+
+
+static int knot_rdata_tests_count(int argc, char *argv[]);
+static int knot_rdata_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api rdata_tests_api = {
+	"DNS library - rdata",        //! Unit name
+	&knot_rdata_tests_count,  //! Count scheduled tests
+	&knot_rdata_tests_run     //! Run scheduled tests
+};
+
+/*----------------------------------------------------------------------------*/
+/*
+ *  Unit implementation.
+ */
+
+static uint16_t *RDATA_ITEM_PTR = (uint16_t *)0xDEADBEEF;
+
+enum { RDATA_ITEMS_COUNT = 7, TEST_RDATA_COUNT = 4 , RDATA_DNAMES_COUNT = 2 };
+
+static knot_dname_t RDATA_DNAMES[RDATA_DNAMES_COUNT] = {
+	{{}, (uint8_t *)"\6abcdef\7example\3com", 20,
+         (uint8_t *)"\x0\x7\xF", 3},
+	{{}, (uint8_t *)"\6abcdef\3foo\3com", 16,
+        (uint8_t *)"\x0\x7\xB", 3}
+};
+
+static knot_rdata_item_t TEST_RDATA_ITEMS[RDATA_ITEMS_COUNT] = {
+	{.dname = (knot_dname_t *)0xF00},
+	{.raw_data = (uint16_t *)"some data"},
+	{.raw_data = (uint16_t *)"other data"},
+	{.raw_data = (uint16_t *)"123456"},
+	{.raw_data = (uint16_t *)"654321"},
+	{.dname = &RDATA_DNAMES[0]},
+	{.dname = &RDATA_DNAMES[1]}
+};
+
+/* \note indices 0 to 3 should not be changed - used in (and only in)
+ * test_rdata_compare() - better than creating new struct just for this
+ */
+static knot_rdata_t test_rdata[TEST_RDATA_COUNT] = {
+	{&TEST_RDATA_ITEMS[3], 1, &test_rdata[1]},
+	{&TEST_RDATA_ITEMS[4], 1, &test_rdata[2]},
+	{&TEST_RDATA_ITEMS[5], 1, &test_rdata[3]},
+	{&TEST_RDATA_ITEMS[6], 1, &test_rdata[4]},
+};
+
+static knot_rdata_t TEST_RDATA = {
+	&TEST_RDATA_ITEMS[0],
+	3,
+	&TEST_RDATA
+};
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_new().
+ *
+ * Creates new RDATA structure with no items and tests if there really are no
+ * items in it.
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_create()
+{
+	knot_rdata_t *rdata = knot_rdata_new();
+	if (rdata == NULL) {
+		diag("RDATA structure not created!");
+		return 0;
+	}
+
+	if (knot_rdata_item(rdata, 0) != NULL) {
+		diag("Get item returned something else than NULL!");
+		knot_rdata_free(&rdata);
+		return 0;
+	}
+
+	knot_rdata_free(&rdata);
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_free().
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_delete()
+{
+	// how to test this??
+	return 0;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void generate_rdata(uint8_t *data, int size)
+{
+	for (int i = 0; i < size; ++i) {
+		data[i] = rand() % 256;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int fill_rdata(uint8_t *data, int max_size, uint16_t rrtype,
+                      knot_rdata_t *rdata)
+{
+	assert(rdata != NULL);
+	assert(data != NULL);
+	assert(max_size > 0);
+
+	uint8_t *pos = data;
+	int used = 0;
+	int wire_size = 0;
+
+	//note("Filling RRType %u", rrtype);
+
+	knot_rrtype_descriptor_t *desc =
+	knot_rrtype_descriptor_by_type(rrtype);
+
+	uint item_count = desc->length;
+	knot_rdata_item_t *items =
+	(knot_rdata_item_t *)malloc(item_count
+				      * sizeof(knot_rdata_item_t));
+
+	for (int i = 0; i < item_count; ++i) {
+		uint size = 0;
+		int domain = 0;
+		knot_dname_t *dname = NULL;
+		int binary = 0;
+		int stored_size = 0;
+
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			dname = knot_dname_new_from_wire(
+			                (uint8_t *)test_domains_ok[0].wire,
+			                test_domains_ok[0].size, NULL);
+			assert(dname != NULL);
+			/* note("Created domain name: %s",
+			         knot_dname_name(dname)); */
+			//note("Domain name ptr: %p", dname);
+			domain = 1;
+			size = knot_dname_size(dname);
+			//note("Size of created domain name: %u", size);
+			assert(size < KNOT_MAX_RDATA_ITEM_SIZE);
+			// store size of the domain name
+			*(pos++) = size;
+			// copy the domain name
+			memcpy(pos, knot_dname_name(dname), size);
+			pos += size;
+			break;
+		default:
+			binary = 1;
+			size = rand() % KNOT_MAX_RDATA_ITEM_SIZE;
+		}
+
+		if (binary) {
+			// Rewrite the actual 2 bytes in the data array
+			// with length.
+			// (this is a bit ugly, but does the work ;-)
+			knot_wire_write_u16(pos, size);
+			//*pos = size;
+		}
+
+		//note("Filling %u bytes", size);
+		used += size;
+		assert(used < max_size);
+
+		if (domain) {
+			items[i].dname = dname;
+			wire_size += knot_dname_size(dname);
+/*			note("Saved domain name ptr on index %d: %p",
+			      i, items[i].dname); */
+		} else {
+			free(dname);
+//			note("Saved raw data ptr on index %d: %p",i, pos);
+			items[i].raw_data = (uint16_t *)pos;
+			pos += size;
+			wire_size += size;
+			if (binary && !stored_size) {
+				wire_size -= 2;
+			}
+		}
+	}
+
+	int res = knot_rdata_set_items(rdata, items, item_count);
+	if (res != 0) {
+		diag("knot_rdata_set_items() returned %d.", res);
+		free(items);
+		return -1;
+	} else {
+		free(items);
+		return wire_size;
+	}
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Checks if all RDATA items in the given RDATA structure are correct.
+ *
+ * \return Number of errors encountered. Error is either if some RDATA item
+ *         is not set (i.e. NULL) or if it has other than the expected value.
+ */
+static int check_rdata(const uint8_t *data, int max_size, uint16_t rrtype,
+                       const knot_rdata_t *rdata)
+{
+	assert(rdata != NULL);
+	assert(data != NULL);
+	assert(max_size > 0);
+
+	int errors = 0;
+
+	const uint8_t *pos = data;
+	int used = 0;
+
+	knot_rrtype_descriptor_t *desc =
+	knot_rrtype_descriptor_by_type(rrtype);
+	uint item_count = desc->length;
+	//note("check_rdata(), RRType: %u", rrtype);
+	//note("  item count: %u", item_count);
+
+	for (int i = 0; i < item_count; ++i) {
+		uint size = 0;
+		int domain = 0;
+		int binary = 0;
+
+		//note("  item: %d", i);
+
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			//note("    domain name");
+			domain = 1;
+			size = knot_dname_size(knot_rdata_item(
+						 rdata, i)->dname);
+			break;
+		default:
+			size =
+			knot_wire_read_u16((uint8_t *)
+					     (knot_rdata_item(
+					      rdata, i)->raw_data));
+		}
+
+		assert(size > 0);
+		//note("Size: %u", size);
+		used += size;
+		assert(used < max_size);
+
+		//note("    item size: %u", size);
+
+		if (domain) {
+			/*note("Domain name ptr: %p",
+				knot_rdata_get_item(rdata, i)->dname);*/
+			// check dname size
+			if (*pos != size) {
+				diag("Domain name stored in %d-th"
+				     "RDATA has wrong size: %d"
+				     " (should be %d)", size, *pos);
+				++errors;
+			} else if (strncmp((char *)knot_dname_name(
+			           knot_rdata_item(rdata, i)->dname),
+			           (char *)(pos + 1), *pos) != 0) {
+				diag("Domain name stored in %d-th"
+				     "RDATA item is wrong: %s ("
+				     "should be %.*s)", i,
+				     knot_dname_name(knot_rdata_item(
+				     rdata, i)->dname),
+				     *pos, (char *)(pos + 1));
+				++errors;
+			}
+
+			pos += *pos + 1;
+
+			continue;
+		}
+
+		if (binary &&
+		    size !=
+		    knot_wire_read_u16(
+			(uint8_t *)(knot_rdata_item(rdata, i)->raw_data))) {
+		    diag("Size of stored binary data is wrong:"
+		         " %u (should be %u)",
+			 knot_rdata_item(rdata, i)->raw_data[0] + 1,
+			                       size);
+			++errors;
+		}
+
+		if (strncmp((char *)
+		   (&knot_rdata_item(rdata, i)->raw_data[0]),
+		   (char *)pos, size) != 0) {
+/*			knot_rrtype_descriptor_t *desc =
+			knot_rrtype_descriptor_by_type(rrtype); */
+
+			diag("Data stored in %d-th RDATA item are wrong.", i);
+			++errors;
+		}
+
+		pos += size;
+	}
+
+	return errors;
+}
+
+/*----------------------------------------------------------------------------*/
+
+//static int convert_to_wire(const uint8_t *data, int max_size, uint16_t rrtype,
+//                           uint8_t *data_wire)
+//{
+//	//note("Converting type %u", rrtype);
+
+//	int wire_size = 0;
+//	const uint8_t *pos = data;
+//	uint8_t *pos_wire = data_wire;
+
+//	knot_rrtype_descriptor_t *desc =
+//	knot_rrtype_descriptor_by_type(rrtype);
+//	uint item_count = desc->length;
+
+//	for (int i = 0; i < item_count; ++i) {
+//		const uint8_t *from = NULL;
+//		uint to_copy = 0;
+
+//		switch (desc->wireformat[i]) {
+//		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+//		case KNOT_RDATA_WF_LITERAL_DNAME:
+//			// copy the domain name without its length
+//			from = pos + 1;
+//			to_copy = *pos;
+//			pos += *pos + 1;
+///*			note("Domain name in wire format (size %u): %s",
+//			     to_copy, (char *)from); */
+//			break;
+//		case KNOT_RDATA_WF_BYTE:
+//			//note("    1byte int");
+//			from = pos;
+//			to_copy = 1;
+//			pos += 1;
+//			break;
+//		case KNOT_RDATA_WF_SHORT:
+//			//note("    2byte int");
+//			from = pos;
+//			to_copy = 2;
+//			pos += 2;
+//			break;
+//		case KNOT_RDATA_WF_LONG:
+//			//note("    4byte int");
+//			from = pos;
+//			to_copy = 4;
+//			pos += 4;
+//			break;
+//		case KNOT_RDATA_WF_A:
+//			//note("    A");
+//			from = pos;
+//			to_copy = 4;
+//			pos += 4;
+//			break;
+//		case KNOT_RDATA_WF_AAAA:
+//			//note("    AAAA");
+//			from = pos;
+//			to_copy = 16;
+//			pos += 16;
+//			break;
+//		case KNOT_RDATA_WF_BINARY:
+//		case KNOT_RDATA_WF_APL:            // saved as binary
+//		case KNOT_RDATA_WF_IPSECGATEWAY:   // saved as binary
+//			//note("    binary");
+//			from = pos + 1;
+//			to_copy = *pos;
+//			pos += *pos + 1;
+//			break;
+//		case KNOT_RDATA_WF_TEXT:
+//		case KNOT_RDATA_WF_BINARYWITHLENGTH:
+//			//note("    text or binary with length (%u)", *pos);
+//			to_copy = *pos + 1;
+//			from = pos;
+//			pos += *pos + 1;
+//			break;
+//		default:
+//			assert(0);
+//		}
+
+//		//note("Copying %u bytes from %p", to_copy, from);
+
+//		assert(from != NULL);
+//		assert(to_copy != 0);
+
+//		memcpy(pos_wire, from, to_copy);
+//		pos_wire += to_copy;
+//		wire_size += to_copy;
+
+//		assert(wire_size < max_size);
+//	}
+
+//	return wire_size;
+//}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_set_item().
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_set_item()
+{
+	knot_rdata_t *rdata = knot_rdata_new();
+	knot_rdata_item_t item;
+	item.raw_data = RDATA_ITEM_PTR;
+
+	int ret = knot_rdata_set_item(rdata, 0, item);
+	if (ret == 0) {
+		diag("knot_rdata_set_item() called on empty RDATA"
+		     "returned %d instead of error (-1).", ret);
+		knot_rdata_free(&rdata);
+		return 0;
+	}
+
+//	uint8_t *data = malloc(sizeof(uint8_t) * KNOT_MAX_RDATA_WIRE_SIZE);
+//	assert(data);
+	uint8_t data[KNOT_MAX_RDATA_WIRE_SIZE];
+	generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+
+	// set items through set_items() and then call set_item()
+	uint16_t rrtype = rand() % KNOT_RRTYPE_LAST + 1;
+	if (fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, rrtype, rdata) < 0) {
+		knot_rdata_free(&rdata);
+		diag("Error filling RDATA");
+		return 0;
+	}
+
+	uint8_t pos = rand() % knot_rrtype_descriptor_by_type(rrtype)->length;
+
+	knot_rrtype_descriptor_t *desc =
+	  knot_rrtype_descriptor_by_type(rrtype);
+
+	// if the rdata on this position is domain name, free it to avoid leaks
+	if (desc->wireformat[pos] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME
+	    || desc->wireformat[pos] == KNOT_RDATA_WF_COMPRESSED_DNAME
+	    || desc->wireformat[pos] == KNOT_RDATA_WF_LITERAL_DNAME) {
+		knot_dname_free(&(rdata->items[pos].dname));
+	}
+
+	ret = knot_rdata_set_item(rdata, pos, item);
+	if (ret != 0) {
+		diag("knot_rdata_set_item() called on filled"
+		     " RDATA returned %d instead of 0.", ret);
+		knot_rdata_free(&rdata);
+		return 0;
+	}
+
+	if (knot_rdata_item(rdata, pos)->raw_data != RDATA_ITEM_PTR) {
+		diag("RDATA item on position %d is wrong: %p (should be %p).",
+		     pos, knot_rdata_item(rdata, pos)->raw_data,
+		     RDATA_ITEM_PTR);
+		knot_rdata_free(&rdata);
+		return 0;
+	}
+
+	for (int x = 0; x < desc->length; x++) {
+	       if (x != pos && (
+		   desc->wireformat[x] ==
+	               KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+	           desc->wireformat[x] ==
+	               KNOT_RDATA_WF_COMPRESSED_DNAME ||
+	           desc->wireformat[x] ==
+	               KNOT_RDATA_WF_LITERAL_DNAME)) {
+		knot_dname_free(&(rdata->items[x].dname));
+	       }
+	}
+
+//	knot_rdata_free(&rdata);
+	return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_set_items().
+ *
+ * Iterates over the test_rdatas array and for each testing RDATA it creates
+ * the RDATA structure, sets its items (\see set_rdata_all()) and checks if the
+ * items are set properly (\see check_rdata()).
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_set_items()
+{
+	knot_rdata_t *rdata = NULL;
+	knot_rdata_item_t *item = (knot_rdata_item_t *)0xDEADBEEF;
+	int errors = 0;
+
+	// check error return values
+	if (knot_rdata_set_items(rdata, NULL, 0) != KNOT_EBADARG) {
+		diag("Return value of knot_rdata_set_items() "
+		     "when rdata == NULL is wrong");
+		return 0;
+	} else {
+		rdata = knot_rdata_new();
+		assert(rdata != NULL);
+
+		if (knot_rdata_set_items(rdata, NULL, 0) != KNOT_EBADARG) {
+			diag("Return value of knot_rdata_set_items()"
+			     " when items == NULL is wrong");
+//			knot_rdata_free(&rdata);
+			return 0;
+		} else if (knot_rdata_set_items(rdata, item, 0) !=
+			   KNOT_EBADARG) {
+			diag("Return value of knot_rdata_set_items()"
+			     " when count == 0"
+			     "is wrong");
+//			knot_rdata_free(&rdata);
+			return 0;
+		}
+//		knot_rdata_free(&rdata);
+	}
+
+	// generate some random data
+//	uint8_t *data = malloc(sizeof(uint8_t) * KNOT_MAX_RDATA_WIRE_SIZE);
+	uint8_t data [KNOT_MAX_RDATA_WIRE_SIZE];
+	generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+
+	for (int i = 0; i <= KNOT_RRTYPE_LAST; ++i) {
+		rdata = knot_rdata_new();
+
+		if (fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i, rdata)
+		    < 0) {
+			++errors;
+		}
+		errors += check_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i,
+		                      rdata);
+
+		knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(i);
+
+		for (int x = 0; x < desc->length; x++) {
+			if (desc->wireformat[x] ==
+			    KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+			    desc->wireformat[x] ==
+			    KNOT_RDATA_WF_COMPRESSED_DNAME ||
+			    desc->wireformat[x] ==
+			    KNOT_RDATA_WF_LITERAL_DNAME) {
+//            printf("freeing %p\n", rdata->items[x].dname);
+				knot_dname_free(&(rdata->items[x].dname));
+			}
+		}
+
+//		knot_rdata_free(&rdata);
+	}
+
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_get_item().
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_get_item()
+{
+	const knot_rdata_t *rdata = &TEST_RDATA;
+
+	if (knot_rdata_item(rdata, TEST_RDATA.count) != NULL) {
+		diag("knot_rdata_get_item() called with"
+		     "invalid position did not return NULL");
+		return 0;
+	}
+
+	int errors = 0;
+	if ((knot_rdata_item(rdata, 0)->dname)
+	      != TEST_RDATA.items[0].dname) {
+		diag("RDATA item on position 0 is wrong: %p (should be %p)",
+		     knot_rdata_item(rdata, 0), TEST_RDATA.items[0]);
+		++errors;
+	}
+	if ((knot_rdata_item(rdata, 1)->raw_data)
+	      != TEST_RDATA.items[1].raw_data) {
+		diag("RDATA item on position 0 is wrong: %p (should be %p)",
+		     knot_rdata_item(rdata, 1), TEST_RDATA.items[1]);
+		++errors;
+	}
+	if ((knot_rdata_item(rdata, 2)->raw_data)
+	      != TEST_RDATA.items[2].raw_data) {
+		diag("RDATA item on position 0 is wrong: %p (should be %p)",
+		     knot_rdata_item(rdata, 2), TEST_RDATA.items[2]);
+		++errors;
+	}
+
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int test_rdata_compare()
+{
+	int errors = 0;
+
+	uint8_t format_rawdata = KNOT_RDATA_WF_BINARY;
+
+	uint8_t format_dname = KNOT_RDATA_WF_LITERAL_DNAME;
+
+	/* 123456 \w 654321 -> result -1 */
+	if (knot_rdata_compare(&test_rdata[0],
+	                         &test_rdata[1],
+	                         &format_rawdata) != -1) {
+		diag("RDATA raw data comparison failed 0");
+		errors++;
+	}
+
+	/* 123456 \w 123456 -> result 0 */
+	if (knot_rdata_compare(&test_rdata[0],
+	                         &test_rdata[0],
+	                         &format_rawdata) != 0) {
+		diag("RDATA raw data comparison failed 1 ");
+		errors++;
+	}
+
+	/* 123456 \w 654321 -> result 1 */
+	if (knot_rdata_compare(&test_rdata[1],
+	                         &test_rdata[0],
+	                         &format_rawdata) != 1) {
+		diag("RDATA raw data comparison failed 2");
+		errors++;
+	}
+
+	/* abcdef.example.com. \w abcdef.foo.com. -> result -1 */
+	int ret = 0;
+	if ((ret = knot_rdata_compare(&test_rdata[2],
+	                         &test_rdata[3],
+	                         &format_dname)) >= 0) {
+		diag("RDATA dname comparison failed 3");
+		errors++;
+	}
+
+	/* abcdef.example.com. \w abcdef.example.com. -> result 0 */
+	if (knot_rdata_compare(&test_rdata[2],
+	                         &test_rdata[2],
+	                         &format_dname) != 0) {
+		diag("RDATA dname comparison failed 4");
+		errors++;
+	}
+
+	/* abcdef.example.com. \w abcdef.foo.com -> result 1 */
+	if (knot_rdata_compare(&test_rdata[3],
+	                         &test_rdata[2],
+	                         &format_dname) != 1) {
+		diag("RDATA dname comparison failed 5");
+		errors++;
+	}
+
+
+
+
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+//static int test_rdata_wire_size()
+//{
+//	knot_rdata_t *rdata;
+//	int errors = 0;
+
+//	// generate some random data
+//	uint8_t data[KNOT_MAX_RDATA_WIRE_SIZE];
+//	generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+
+//	for (int i = 0; i <= KNOT_RRTYPE_LAST; ++i) {
+//		rdata = knot_rdata_new();
+
+//		int size =
+//		fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i, rdata);
+
+//		if (size < 0) {
+//			++errors;
+//		} else {
+//			int counted_size = knot_rdata_wire_size(rdata,
+//			    knot_rrtype_descriptor_by_type(i)->wireformat);
+//			if (size != counted_size) {
+//				diag("Wrong wire size computed (type %d):"
+//				     " %d (should be %d)",
+//				     i, counted_size, size);
+//				++errors;
+//			}
+//		}
+
+//		knot_rrtype_descriptor_t *desc =
+//		    knot_rrtype_descriptor_by_type(i);
+
+//		for (int x = 0; x < desc->length; x++) {
+//			if (desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_COMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_LITERAL_DNAME) {
+//				knot_dname_free(&(rdata->items[x].dname));
+//			}
+//		}
+//		knot_rdata_free(&rdata);
+//	}
+
+//	return (errors == 0);
+//}
+
+/*----------------------------------------------------------------------------*/
+
+//static int test_rdata_to_wire()
+//{
+//	knot_rdata_t *rdata;
+//	int errors = 0;
+
+//	// generate some random data
+//	uint8_t data[KNOT_MAX_RDATA_WIRE_SIZE];
+//	uint8_t data_wire[KNOT_MAX_RDATA_WIRE_SIZE];
+//	uint8_t rdata_wire[KNOT_MAX_RDATA_WIRE_SIZE];
+//	generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+
+//	for (int i = 0; i <= KNOT_RRTYPE_LAST; ++i) {
+//		rdata = knot_rdata_new();
+
+//		int size =
+//		fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i, rdata);
+
+//		int size_expected =
+//	        convert_to_wire(data, KNOT_MAX_RDATA_WIRE_SIZE, i,
+//			        data_wire);
+
+//		if (size < 0) {
+//			++errors;
+//		} else {
+//			if (size != size_expected) {
+//				diag("Wire format size (%u) not"
+//				     " as expected (%u)",
+//				     size, size_expected);
+//				++errors;
+//			} else {
+//				if (knot_rdata_to_wire(rdata,
+//				    knot_rrtype_descriptor_by_type(i)->
+//				    wireformat, rdata_wire,
+//				    KNOT_MAX_RDATA_WIRE_SIZE) != 0) {
+//					diag("Error while converting RDATA"
+//					     " to wire format.");
+//					++errors;
+//				} else {
+//					if (strncmp((char *)data_wire,
+//						    (char *)rdata_wire, size)
+//					                != 0) {
+//						diag("RDATA converted to wire"
+//						     "format does not match"
+//						     " the expected value");
+//						++errors;
+//					}
+//				}
+//			}
+//		}
+
+//		knot_rrtype_descriptor_t *desc =
+//		knot_rrtype_descriptor_by_type(i);
+
+//		for (int x = 0; x < desc->length; x++) {
+//			if (desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_COMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_LITERAL_DNAME) {
+//				knot_dname_free(&(rdata->items[x].dname));
+//			}
+//		}
+//		knot_rdata_free(&rdata);
+//	}
+
+//	return (errors == 0);
+//}
+
+static int test_rdata_free()
+{
+	return 0;
+//	knot_rdata_t *tmp_rdata;
+
+//	tmp_rdata = knot_rdata_new();
+
+//	knot_rdata_free(&tmp_rdata);
+
+//	return (tmp_rdata == NULL);
+}
+/* Can't test this with current implementation
+ * would be trying to free pointers on stack */
+static int test_rdata_deep_free()
+{
+	return 0;
+
+/*	int errors = 0;
+
+	knot_rdata_t *tmp_rdata;
+
+	uint8_t data[KNOT_MAX_RDATA_WIRE_SIZE];
+
+	for (int i = 0; i <= KNOT_RRTYPE_LAST; i++) {
+		tmp_rdata = knot_rdata_new();
+
+		fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i, tmp_rdata);
+
+		knot_rdata_deep_free(&tmp_rdata, i, 0);
+		errors += (tmp_rdata != NULL);
+	}
+
+	return (errors == 0); */
+}
+
+/*----------------------------------------------------------------------------*/
+
+static const int KNOT_RDATA_TEST_COUNT = 8;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_rdata_tests_count(int argc, char *argv[])
+{
+	return KNOT_RDATA_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_rdata_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_final = 1;
+
+	res = test_rdata_create();
+	ok(res, "rdata: create empty");
+	res_final *= res;
+
+	skip(!res, 6);
+
+	todo();
+
+	ok(res = test_rdata_delete(), "rdata: delete");
+	//res_final *= res;
+
+	endtodo;
+
+	ok(res = test_rdata_get_item(), "rdata: get item");
+	res_final *= res;
+
+	skip(!res, 4)
+
+	ok(res = test_rdata_set_items(), "rdata: set items all at once");
+	res_final *= res;
+
+	skip(!res, 3);
+
+	ok(res = test_rdata_set_item(), "rdata: set items one-by-one");
+	res_final *= res;
+
+	ok(res = test_rdata_compare(), "rdata: compare");
+	res_final *= res;
+
+//	ok(res = test_rdata_wire_size(), "rdata: wire size");
+//	res_final *= res;
+
+//	skip(!res, 1);
+
+//	ok(res = test_rdata_to_wire(), "rdata: to wire");
+//	res_final *= res;
+
+//	endskip;	/* test_rdata_wire_size() failed */
+
+	endskip;	/* test_rdata_set_items() failed */
+
+	endskip;	/* test_rdata_get_item() failed */
+
+	endskip;	/* test_rdata_create() failed */
+
+	todo();
+
+	ok(res = test_rdata_deep_free(), "rdata: deep free");
+	res_final *= res;
+
+	ok(res = test_rdata_free(), "rdata: free");
+	res_final *= res;
+
+	endtodo;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/rdata_tests.h b/src/tests/libknot/libknot/rdata_tests.h
new file mode 100644
index 0000000..1f43c91
--- /dev/null
+++ b/src/tests/libknot/libknot/rdata_tests.h
@@ -0,0 +1,52 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file rdata_tests.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * Contains unit tests for RDATA (knot_rdata_t) and RDATA item
+ * (knot_rdata_item_t) structures.
+ *
+ * Contains tests for:
+ * - creating empty RDATA structure with or without reserved space.
+ * - setting RDATA items one-by-one
+ * - setting RDATA items all at once
+ *
+ * As for now, the tests use several (TEST_RDATAS) RDATA structures, each
+ * with different number of RDATA items (given by test_rdatas). These are all
+ * initialized to pointers derived from RDATA_ITEM_PTR (first is RDATA_ITEM_PTR,
+ * second RDATA_ITEM_PTR + 1, etc.). The functions only test if the pointer
+ * is set properly.
+ *
+ * \todo It may be better to test also some RDATAs with predefined contents,
+ *       such as some numbers, some domain name, etc. For this purpose, we'd
+ *       need RDATA descriptors (telling the types of each RDATA item within an
+ *       RDATA).
+ *
+ * \todo It will be fine to test all possible output values of all functions,
+ *       e.g. test whether knot_rdata_get_item() returns NULL when passed an
+ *       illegal position, etc.
+ */
+#ifndef _KNOTD_RDATA_TESTS_H_
+#define _KNOTD_RDATA_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api rdata_tests_api;
+
+#endif /* _KNOTD_RDATA_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/response_tests.c b/src/tests/libknot/libknot/response_tests.c
new file mode 100644
index 0000000..93cf2df
--- /dev/null
+++ b/src/tests/libknot/libknot/response_tests.c
@@ -0,0 +1,450 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <inttypes.h>
+
+//#define RESP_TEST_DEBUG
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "tests/libknot/libknot/response_tests.h"
+#include "common/lists.h"
+#include "libknot/common.h"
+#include "libknot/util/error.h"
+#include "libknot/packet/response.h"
+#include "libknot/rdata.h"
+#include "libknot/rrset.h"
+#include "libknot/dname.h"
+#include "libknot/util/wire.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/edns.h"
+
+#ifdef TEST_WITH_LDNS
+#include "ldns/ldns.h"
+#endif
+
+static int knot_response_tests_count(int argc, char *argv[]);
+static int knot_response_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api response_tests_api = {
+	"DNS library - response",      //! Unit name
+	&knot_response_tests_count,  //! Count scheduled tests
+	&knot_response_tests_run     //! Run scheduled tests
+};
+
+static int test_response_init()
+{
+	int errors = 0;
+	int lived = 0;
+	lives_ok({
+		if (knot_response_init(NULL) != KNOT_EBADARG) {
+			diag("Calling response_init with NULL packet did "
+			     "not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "response: init NULL tests");
+	errors += lived != 1;
+
+	knot_packet_t *response =
+		knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+	assert(response);
+	response->max_size = KNOT_WIRE_HEADER_SIZE - 1;
+	if (knot_response_init(response) != KNOT_ESPACE) {
+		diag("Calling response_init too small packet did "
+		     "not return KNOT_ESPACE!");
+		errors++;
+	}
+
+	return (errors == 0);
+}
+
+static int test_response_init_query()
+{
+	int errors = 0;
+	int lived = 0;
+	lives_ok({
+		if (knot_response_init_from_query(NULL, NULL) !=
+		    KNOT_EBADARG) {
+			diag("Calling response_init_query with NULL packet and "
+			     "NULL query did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_packet_t *response =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(response);
+		knot_packet_set_max_size(response,
+		                           KNOT_PACKET_PREALLOC_RESPONSE);
+		knot_response_init(response);
+		lived = 0;
+		if (knot_response_init_from_query(response, NULL) !=
+		    KNOT_EBADARG) {
+			diag("Calling response_init_query with NULL query "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_packet_t *query =
+			knot_packet_new(KNOT_PACKET_PREALLOC_QUERY);
+		if (knot_response_init_from_query(NULL, query) !=
+		    KNOT_EBADARG) {
+			diag("Calling response_init_query with NULL response "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+	}, "response: init from query NULL tests");
+	errors += lived != 1;
+
+	/* Cannot test the rest of return values, since there is now constant
+	 * controlling value that could return KNOT_EDNAMEPTR */
+
+	return (errors == 0);
+}
+
+int compare_wires_simple(uint8_t *wire1, uint8_t *wire2, uint count)
+{
+	int i = 0;
+	while (i < count &&
+	       wire1[i] == wire2[i]) {
+		i++;
+	}
+	return (!(count == i));
+}
+
+
+//static int test_response_clear()
+//{
+//	int errors = 0;
+//	int lived = 0;
+//	lives_ok({
+//		knot_response_clear(NULL, 1);
+//		lived = 1;
+//	}, "response: clear NULL tests");
+//	errors += lived != 1;
+
+//	/*
+//	 * Create new response, convert to wire, then add something, clear
+//	 * the response, convert to wire again and compare wires.
+//	 */
+
+//	knot_packet_t *response =
+//		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+//	knot_packet_set_max_size(response, KNOT_WIRE_HEADER_SIZE * 100);
+//	assert(knot_response_init(response) == KNOT_EOK);
+
+//	uint8_t *original_wire = NULL;
+//	size_t original_size = 0;
+//	assert(knot_packet_to_wire(response, &original_wire,
+//	                             &original_size) ==
+//	       KNOT_EOK);
+//	/* Do something in question section. */
+////	test_dname_t test_dname;
+////	test_dname.str = "ns8.nic.cz.";
+////	knot_dname_t *dname = dname_from_test_dname_str(&test_dname);
+////	assert(dname);
+
+//	response->question.qtype = KNOT_RRTYPE_HINFO;
+//	response->question.qclass = KNOT_CLASS_CH;
+
+//	uint8_t *question_changed_wire = NULL;
+//	size_t question_changed_size = 0;
+//	assert(knot_packet_to_wire(response,
+//	                             &question_changed_wire,
+//	                             &question_changed_size) ==
+//	       KNOT_EOK);
+
+//	knot_response_set_aa(response);
+//	knot_response_set_tc(response);
+//	knot_response_set_rcode(response, knot_quick_rand());
+
+//	knot_response_clear(response, 0);
+//	uint8_t *new_wire = NULL;
+//	size_t new_size = 0;
+//	assert(knot_packet_to_wire(response, &new_wire, &new_size) ==
+//	       KNOT_EOK);
+//	if (question_changed_size != new_size) {
+//		diag("Wrong wire size after calling response_clear! "
+//		     "got %d should be %d", new_size, question_changed_size);
+//		errors++;
+//	} else {
+//		if (compare_wires_simple(question_changed_wire,
+//		                         new_wire, new_size)) {
+//			diag("Wrong wire after calling response_clear! ");
+//			errors++;
+//		}
+//	}
+//	free(new_wire);
+
+//	new_wire = NULL;
+//	new_size = 0;
+
+//	/*!< \todo figure out this segfault! */
+
+////	knot_response_clear(response, 1);
+////	assert(knot_packet_to_wire(response, &new_wire, &new_size) ==
+////	       KNOT_EOK);
+
+////	if (original_size != new_size) {
+////		diag("Wrong wire size after calling response_clear!");
+////		errors++;
+////	} else {
+////		if (compare_wires_simple(original_wire,
+////		                         new_wire, new_size)) {
+////			diag("Wrong wire after calling response_clear!");
+////			errors++;
+////		}
+////	}
+
+////	free(new_wire);
+////	free(original_wire);
+////	free(question_changed_wire);
+////	knot_packet_free(&response);
+
+//	return (errors == 0);
+//}
+
+static int test_response_add_opt()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_opt_rr_t opt;
+	opt.payload = 512;
+	opt.ext_rcode = 0;
+	opt.version = EDNS_VERSION_0;
+	opt.flags = 0;
+	opt.options = NULL;
+	opt.option_count = 0;
+	opt.options_max = 0;
+	opt.size = 25; // does it matter?
+
+	lives_ok({
+		if (knot_response_add_opt(NULL, NULL, 0) != KNOT_EBADARG) {
+			diag("Calling response add opt with NULL arguments "
+			     "did not result to KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+		knot_packet_t *response =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(response);
+		lived = 0;
+		if (knot_response_add_opt(response,
+		                             NULL, 0) != KNOT_EBADARG) {
+			diag("Calling response add opt with NULL OPT RR "
+			     "did not result to KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_response_add_opt(NULL,
+		                             &opt, 0) != KNOT_EBADARG) {
+			diag("Calling response add opt with NULL response "
+			     "did not result to KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+		knot_packet_free(&response);
+	}, "response: add opt NULL tests");
+	errors += lived != 1;
+
+	knot_packet_t *response =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(response);
+	knot_packet_set_max_size(response, KNOT_PACKET_PREALLOC_RESPONSE * 100);
+	assert(knot_response_init(response) == KNOT_EOK);;
+
+	if (knot_response_add_opt(response, &opt, 0) != KNOT_EOK) {
+		diag("Adding valid OPT RR to response "
+		     "did not return KNOT_EOK");
+		errors++;
+	}
+
+	opt.payload = response->max_size + 1;
+	if (knot_response_add_opt(response, &opt, 1) != KNOT_EPAYLOAD) {
+		diag("If OPT RR payload is bigger than response max size "
+		     "response_add_opt does not return KNOT_EPAYLOAD!");
+		errors++;
+	}
+
+	opt.payload = 0;
+	if (knot_response_add_opt(response, &opt, 1) != KNOT_EBADARG) {
+		diag("Calling response_add_opt with OPT RR payload set to 0 "
+		     "did not return KNOT_EBADARG");
+	}
+
+	knot_packet_free(&response);
+	return (errors == 0);
+}
+
+static int test_response_add_generic(int (*func)(knot_packet_t *,
+                                                 const knot_rrset_t *,
+                                                 int, int, int))
+{
+	int errors = 0;
+	int lived = 0;
+
+	lives_ok({
+		if (func(NULL, NULL, 0, 0, 0) != KNOT_EBADARG) {
+			diag("Calling response add rrset with NULL "
+			     "arguments did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_packet_t *response =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(response);
+		lived = 0;
+		if (func(response, NULL, 0, 0, 0) != KNOT_EBADARG) {
+			diag("Calling response add rrset with NULL rrset "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_dname_t *owner =
+			knot_dname_new_from_str("ns.nic.cz.",
+			                          strlen("ns.nic.cz."),
+			                          NULL);
+		assert(owner);
+		knot_rrset_t *rrset =
+			knot_rrset_new(owner, KNOT_RRTYPE_A,
+			                 KNOT_CLASS_IN, 3600);
+		assert(rrset);
+		lived = 0;
+		if (func(NULL, rrset, 0, 0, 0) != KNOT_EBADARG) {
+			diag("Calling response add rrset with NULL response "
+			     "did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_rrset_deep_free(&rrset, 1, 0, 0);
+		knot_packet_free(&response);
+	}, "response: rrset adding NULL tests");
+	errors += lived != 1;
+
+	/*!< \todo Test case when KNOT_ESPACE should be returned. */
+	/*!< \todo Compression and so on - should it be tested here? */
+
+	knot_packet_t *response =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(response);
+
+	knot_dname_t *owner =
+		knot_dname_new_from_str("ns12.nic.cz.",
+		                          strlen("ns12.nic.cz."),
+		                          NULL);
+	assert(owner);
+	knot_rrset_t *rrset =
+		knot_rrset_new(owner, KNOT_RRTYPE_NS,
+		                 KNOT_CLASS_IN, 3600);
+	assert(rrset);
+	if (func(response, rrset, 0, 0, 0) != KNOT_EOK) {
+		diag("Adding valid RRSet to response did not result to "
+		     "KNOT_EOK");
+		errors++;
+	}
+
+	knot_rrset_deep_free(&rrset, 1, 0, 0);
+	knot_packet_free(&response);
+
+	return (errors == 0);
+}
+
+static void test_response_add_rrset()
+{
+	ok(test_response_add_generic(knot_response_add_rrset_answer),
+	   "response: add answer rrset");
+	ok(test_response_add_generic(knot_response_add_rrset_authority),
+	   "response: add answer authority");
+	ok(test_response_add_generic(knot_response_add_rrset_additional),
+	   "response: add answer additional");
+}
+
+static int test_response_add_nsid()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_packet_t *response =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(response);
+
+	uint8_t *nsid = (uint8_t *)"knotDNS";
+	uint16_t nsid_size = strlen((char *)nsid);
+	lives_ok({
+		if (knot_response_add_nsid(NULL,
+		                              NULL, 1) != KNOT_EBADARG) {
+			diag("Calling response add nsid with NULL arguments "
+			     "did not return KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+
+		lived = 0;
+		if (knot_response_add_nsid(NULL, nsid,
+		                              nsid_size) != KNOT_EBADARG) {
+			diag("Calling response add nsid with NULL response "
+			     "did not return KNOT_EBADARG");
+			errors++;
+		}
+		lived = 1;
+//		lived = 0;
+//		if (knot_response_add_nsid(response, nsid,
+//		                              0) != KNOT_EBADARG) {
+//			diag("Calling response add nsid with zero size "
+//			     "did not return KNOT_EBADARG");
+//			errors++;
+//		}
+//		lived = 1;
+	}, "response: add nsid NULL tests");
+	errors += lived != 1;
+
+	if (knot_response_add_nsid(response, nsid,
+	                              nsid_size) != KNOT_EOK) {
+		diag("Adding valid nsid to response did not return KNOT_EOK");
+		errors++;
+	}
+
+	knot_packet_free(&response);
+	return (errors == 0);
+}
+
+static const int KNOT_response_TEST_COUNT = 14;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_response_tests_count(int argc, char *argv[])
+{
+	return KNOT_response_TEST_COUNT;
+}
+
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_response_tests_run(int argc, char *argv[])
+{
+	ok(test_response_init(), "response: init");
+	ok(test_response_init_query(), "response: init from query");
+//	ok(test_response_clear(), "response: clear");
+	ok(test_response_add_opt(), "response: add opt");
+	test_response_add_rrset();
+	ok(test_response_add_nsid(), "response: add nsid");
+	return 1;
+}
diff --git a/src/tests/libknot/libknot/response_tests.h b/src/tests/libknot/libknot/response_tests.h
new file mode 100644
index 0000000..c9a117b
--- /dev/null
+++ b/src/tests/libknot/libknot/response_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_response_TESTS_H_
+#define _KNOTD_response_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api response_tests_api;
+
+#endif /* _KNOTD_response_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/rrset_tests.c b/src/tests/libknot/libknot/rrset_tests.c
new file mode 100644
index 0000000..fa75195
--- /dev/null
+++ b/src/tests/libknot/libknot/rrset_tests.c
@@ -0,0 +1,888 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/libknot/rrset_tests.h"
+#include "libknot/common.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/rrset.h"
+#include "libknot/dname.h"
+#include "libknot/rdata.h"
+#include "libknot/util/utils.h"
+#include "libknot/zone/node.h"
+#include "libknot/util/debug.h"
+
+static int knot_rrset_tests_count(int argc, char *argv[]);
+static int knot_rrset_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api rrset_tests_api = {
+	"DNS library - rrset",        //! Unit name
+	&knot_rrset_tests_count,  //! Count scheduled tests
+	&knot_rrset_tests_run     //! Run scheduled tests
+};
+
+/*----------------------------------------------------------------------------*/
+/*
+ *  Unit implementation.
+ */
+
+static knot_node_t *NODE_ADDRESS = (knot_node_t *)0xDEADBEEF;
+
+enum { TEST_RRSETS = 6 , TEST_RRSIGS = 6};
+
+//void *RRSIG_ADDRESS = (void *)0xDEADBEEF;
+//void *RRSIG_FIRST = RRSIG_ADDRESS + 10;
+
+struct test_domain {
+	char *str;
+	char *wire;
+	uint size;
+	char *labels;
+	short label_count;
+};
+
+struct test_rrset {
+	char *owner;
+	uint16_t type;
+	uint16_t rclass;
+	uint32_t  ttl;
+	knot_rdata_t *rdata;
+	const knot_rrset_t *rrsigs;
+};
+
+/* this has to changed */
+static const char *signature_strings[TEST_RRSIGS] =
+{"signature 1", "signature 2", "signature 3",
+ "signature 4", "signature 5", "signature 6"};
+
+enum {
+	RR_DNAMES_COUNT = 3,
+	RR_ITEMS_COUNT = 3,
+	RR_RDATA_COUNT = 4,
+};
+
+enum { TEST_DOMAINS_OK = 8 };
+
+static knot_dname_t RR_DNAMES[RR_DNAMES_COUNT] =
+	{ {{}, (uint8_t *)"\7example\3com", 13, NULL}, //0's at the end are added
+	  {{}, (uint8_t *)"\3ns1\7example\3com", 17, NULL},
+	  {{}, (uint8_t *)"\3ns2\7example\3com", 17, NULL} };
+
+/*                         192.168.1.1 */
+static uint8_t address[4] = {0xc0, 0xa8, 0x01, 0x01};
+
+static knot_rdata_item_t RR_ITEMS[RR_ITEMS_COUNT] =
+	{ {.dname = &RR_DNAMES[1]},
+	  {.dname = &RR_DNAMES[2]},
+          {.raw_data = (uint16_t *)address} };
+
+/*! \warning Do not change the order. */
+/* TODO this does not work as expected */
+static knot_rdata_t RR_RDATA[RR_RDATA_COUNT] =
+	{ {&RR_ITEMS[0], 1, &RR_RDATA[0]}, /* first ns */
+	  {&RR_ITEMS[1], 1, &RR_RDATA[1]}, /* second ns */
+	  {&RR_ITEMS[0], 1, &RR_RDATA[3]}, /* both in cyclic list */
+	  {&RR_ITEMS[1], 1, &RR_RDATA[2]} };
+
+/*! \warning Do not change the order in those, if you want to test some other
+ *           feature with new dname, add it at the end of these arrays.
+ */
+static const struct test_domain
+		test_domains_ok[TEST_DOMAINS_OK] = {
+	{ "abc.test.domain.com.", "\3abc\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "xyz.test.domain.com.", "\3xyz\4test\6domain\3com", 21,
+	  "\x0\x4\x9\x10", 4 },
+	{ "some.test.domain.com.", "\4some\4test\6domain\3com", 22,
+	  "\x0\x5\xA\x11", 4 },
+	{ "test.domain.com.", "\4test\6domain\3com", 17,
+	  "\x0\x5\xC", 3 },
+	{ ".", "\0", 1,
+	  "", 0 },
+	{ "foo.bar.net.", "\3foo\3bar\3net", 13,
+	  "\x0\x4\x8", 3},
+	{ "bar.net.", "\3bar\3net", 9,
+	  "\x0\x4", 2}
+};
+
+static struct test_rrset test_rrsets[TEST_RRSETS] = {
+	{ "example.com.",  KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL },
+	{ "example2.com.", KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL },
+	{ "example3.com.", KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL },
+	{ "example.com.", KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL },
+	{ "example.com.", KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL },
+	{ "example.com.", KNOT_RRTYPE_NS, KNOT_CLASS_IN,
+	  3600, NULL, NULL }
+};
+
+static const struct test_rrset test_rrsigs[TEST_RRSIGS] = {
+	{ "example.com.", 46, 1, 3600, NULL },
+	{ "example2.com.", 46, 1, 3600, NULL },
+	{ "example3.com.", 46, 1, 3600, NULL },
+	{ "example4.com.", 46, 1, 3600,	NULL },
+	{ "example5.com.", 46, 1, 3600,	NULL },
+	{ "example6.com.", 46, 1, 3600, NULL }
+};
+
+static void generate_rdata(uint8_t *data, int size)
+{
+	for (int i = 0; i < size; ++i) {
+		data[i] = rand() % 256;
+	}
+}
+
+static int fill_rdata_r(uint8_t *data, int max_size, uint16_t rrtype,
+		      knot_rdata_t *rdata)
+{
+	assert(rdata != NULL);
+	assert(data != NULL);
+	assert(max_size > 0);
+
+	uint8_t *pos = data;
+	int used = 0;
+	int wire_size = 0;
+
+//	note("Filling RRType %u", rrtype);
+
+	knot_rrtype_descriptor_t *desc =
+	knot_rrtype_descriptor_by_type(rrtype);
+
+	uint item_count = desc->length;
+	knot_rdata_item_t *items =
+	(knot_rdata_item_t *)malloc(item_count
+				      * sizeof(knot_rdata_item_t));
+
+	for (int i = 0; i < item_count; ++i) {
+		uint size = 0;
+		int domain = 0;
+		knot_dname_t *dname = NULL;
+		int binary = 0;
+		int stored_size = 0;
+
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			dname = knot_dname_new_from_wire(
+					(uint8_t *)test_domains_ok[0].wire,
+					test_domains_ok[0].size, NULL);
+			assert(dname != NULL);
+//			note("Created domain name: %s",
+//				knot_dname_name(dname));
+//			note("Domain name ptr: %p", dname);
+			domain = 1;
+			size = knot_dname_size(dname);
+//			note("Size of created domain name: %u", size);
+			assert(size < KNOT_MAX_RDATA_ITEM_SIZE);
+			// store size of the domain name
+			*(pos++) = size;
+			// copy the domain name
+			memcpy(pos, knot_dname_name(dname), size);
+			pos += size;
+			break;
+		default:
+			binary = 1;
+			size = rand() % KNOT_MAX_RDATA_ITEM_SIZE;
+		}
+
+		if (binary) {
+			// Rewrite the actual 2 bytes in the data array
+			// with length.
+			// (this is a bit ugly, but does the work ;-)
+			knot_wire_write_u16(pos, size);
+			//*pos = size;
+		}
+
+		//note("Filling %u bytes", size);
+		used += size;
+		assert(used < max_size);
+
+		if (domain) {
+			items[i].dname = dname;
+			wire_size += knot_dname_size(dname);
+/*			note("Saved domain name ptr on index %d: %p",
+			      i, items[i].dname); */
+		} else {
+			free(dname);
+//			note("Saved raw data ptr on index %d: %p",i, pos);
+			items[i].raw_data = (uint16_t *)pos;
+			pos += size;
+			wire_size += size;
+			if (binary && !stored_size) {
+				wire_size -= 2;
+			}
+		}
+	}
+
+	int res = knot_rdata_set_items(rdata, items, item_count);
+	if (res != 0) {
+		diag("knot_rdata_set_items() returned %d.", res);
+		free(items);
+		return -1;
+	} else {
+		free(items);
+		return wire_size;
+	}
+}
+
+/* fills test_rrsets with random rdata when empty */
+static void create_rdata()
+{
+	knot_rdata_t *r;
+
+	uint8_t *data =
+		malloc(sizeof(uint8_t) * KNOT_MAX_RDATA_WIRE_SIZE);
+
+	assert(data);
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		if (test_rrsets[i].rdata == NULL) {
+			r = knot_rdata_new();
+
+			/* from rdata tests */
+			generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+			if (fill_rdata_r(data, KNOT_MAX_RDATA_WIRE_SIZE,
+				       test_rrsets[i].type, r) <= 0) {
+				diag("Error creating rdata!");
+
+			}
+
+			test_rrsets[i].rdata = r;
+		}
+	}
+
+	free(data);
+}
+
+static int check_rrset(const knot_rrset_t *rrset, int i,
+                       int check_rdata, int check_items,
+		       int check_rrsigs)
+{
+	/* following implementation should be self-explanatory */
+	int errors = 0;
+
+	if (rrset == NULL) {
+		diag("RRSet not created!");
+		return 1;
+	}
+
+	char *owner = knot_dname_to_str(rrset->owner);
+	if (strcmp(owner, test_rrsets[i].owner) != 0) {
+		diag("OWNER domain name wrong: '%s' (should be '%s')",
+		     owner, test_rrsets[i].owner);
+		++errors;
+	}
+	free(owner);
+
+	if (rrset->type != test_rrsets[i].type) {
+		diag("TYPE wrong: %u (should be: %u)", rrset->type,
+		     test_rrsets[i].type);
+		++errors;
+	}
+
+	if (rrset->rclass != test_rrsets[i].rclass) {
+		diag("CLASS wrong: %u (should be: %u)", rrset->rclass,
+		     test_rrsets[i].rclass);
+		++errors;
+	}
+
+	if (rrset->ttl != test_rrsets[i].ttl) {
+		diag("TTL wrong: %u (should be: %u)", rrset->ttl,
+		     test_rrsets[i].ttl);
+		++errors;
+	}
+
+	if (check_rdata) {
+		/* TODO use rdata_compare */
+		knot_rdata_t *rdata = rrset->rdata;
+
+		if (rdata == NULL) {
+			diag("There are no RDATAs in the RRSet");
+			++errors;
+		}
+
+		if (rdata != NULL) {
+			while (rdata->next != NULL &&
+			       rdata->next != rrset->rdata) {
+				rdata = rdata->next;
+			}
+			if (rdata->next == NULL) {
+				diag("The list of RDATAs is not cyclic!");
+				++errors;
+			} else {
+				assert(rdata->next == rrset->rdata);
+			}
+		}
+	}
+
+	if (check_items) {
+		knot_rrtype_descriptor_t *desc =
+			knot_rrtype_descriptor_by_type(rrset->type);
+		if (knot_rdata_compare(rrset->rdata,
+			                 test_rrsets[i].rdata,
+					 desc->wireformat) != 0) {
+			diag("Rdata items do not match.");
+			errors++;
+		}
+	}
+
+	/* TODO this deserves a major improvement!!! */
+
+	/*
+	 * Will work only with null terminated strings,
+	 * consider changing to more versatile implementation
+	 */
+
+	/* How about, once it's tested, using rdata_compare */
+
+	if (check_rrsigs) {
+
+		const knot_rrset_t *rrsigs;
+
+		rrsigs = knot_rrset_rrsigs(rrset);
+		if (strcmp((const char *)rrsigs->rdata->items[0].raw_data,
+		                signature_strings[i])) {
+			diag("Signatures are not equal"
+			     "to those set when creating."
+			     "Comparing %s with %s",
+			     rrsigs->rdata->items[0].raw_data,
+			     signature_strings[i]);
+			errors++;
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_create()
+{
+	int errors = 0;
+
+	for (int i = 0; i < TEST_RRSETS; ++i) {
+		knot_dname_t *owner = knot_dname_new_from_str(
+		                            test_rrsets[i].owner,
+		                            strlen(test_rrsets[i].owner),
+		                            NODE_ADDRESS);
+		if (owner == NULL) {
+			diag("Error creating owner domain name!");
+			return 0;
+		}
+		knot_rrset_t *rrset = knot_rrset_new(owner,
+		                                         test_rrsets[i].type,
+		                                         test_rrsets[i].rclass,
+		                                         test_rrsets[i].ttl);
+
+		errors += check_rrset(rrset, i, 0, 0, 0);
+
+		knot_rrset_free(&rrset);
+		knot_dname_free(&owner);
+	}
+
+	//diag("Total errors: %d", errors);
+
+	return (errors == 0);
+}
+
+/* Not implemented - no way how to test unfreed memory from here (yet) */
+static int test_rrset_delete()
+{
+	return 0;
+}
+
+static int test_rrset_add_rdata()
+{
+	/* rdata add */
+	int errors = 0;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		knot_dname_t *owner = knot_dname_new_from_str(
+		                            test_rrsets[i].owner,
+		                            strlen(test_rrsets[i].owner),
+		                            NODE_ADDRESS);
+		if (owner == NULL) {
+			diag("Error creating owner domain name!");
+			return 0;
+		}
+
+		knot_rrset_t *rrset = knot_rrset_new(owner,
+		                                         test_rrsets[i].type,
+		                                         test_rrsets[i].rclass,
+		                                         test_rrsets[i].ttl);
+
+		knot_rrset_add_rdata(rrset, test_rrsets[i].rdata);
+
+		errors += check_rrset(rrset, i, 1, 0, 0);
+
+		knot_rrset_free(&rrset);
+		knot_dname_free(&owner);
+	}
+
+	/* test whether adding works properly = keeps order of added elements */
+
+	/*
+	 * Beware, this is dependent on the internal structure of rrset and
+	 * may change.
+	 */
+
+	knot_rrset_t *rrset = knot_rrset_new(NULL, 0, 0, 0);
+
+	knot_rdata_t *r;
+
+	knot_rdata_item_t *item;
+
+	static const char *test_strings[10] =
+	    { "-2", "9", "2", "10", "1", "5", "8", "4", "6", "7" };
+
+	/* add items */
+
+	for (int i = 0; i < 10; i++) {
+		r = knot_rdata_new();
+		item = malloc(sizeof(knot_rdata_item_t));
+		item->raw_data = (uint16_t *)test_strings[i];
+		//following statement creates a copy
+		knot_rdata_set_items(r, item, 1);
+		knot_rrset_add_rdata(rrset, r);
+		free(item);
+	}
+
+	knot_rdata_t *tmp = rrset->rdata;
+
+	/* check if order has been kept */
+
+	int i = 0;
+	while (tmp->next != rrset->rdata && !errors) {
+		if (strcmp(test_strings[i], (char *)tmp->items[0].raw_data)) {
+			diag("Adding RDATA error!, is %s should be %s",
+			tmp->items[0].raw_data, test_strings[i]);
+			errors++;
+		}
+		i++;
+		tmp = tmp->next;
+
+	}
+
+	tmp = rrset->rdata;
+
+	knot_rdata_t *next;
+
+	while (tmp->next != rrset->rdata) {
+		next = tmp->next;
+		knot_rdata_free(&tmp);
+		tmp = next;
+	}
+
+	knot_rdata_free(&tmp);
+
+	knot_rrset_free(&rrset);
+
+	return (errors == 0);
+}
+
+static int test_rrset_rrsigs()
+{
+	int errors = 0;
+
+	knot_rdata_item_t *item;
+
+	knot_rdata_t *tmp;
+
+	knot_dname_t *owner;
+
+	knot_rrset_t *rrset;
+
+	/* Gets rrsigs and checks, if signatures are the same */
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		owner = knot_dname_new_from_str(test_rrsets[i].owner,
+		strlen(test_rrsets[i].owner), NODE_ADDRESS);
+		if (owner == NULL) {
+			diag("Error creating owner domain name!");
+			return 0;
+		}
+
+		rrset = knot_rrset_new(owner, test_rrsets[i].type,
+		test_rrsets[i].rclass, test_rrsets[i].ttl);
+
+		knot_rrset_add_rdata(rrset, test_rrsets[i].rdata);
+
+		//owners are the same
+
+		assert(TEST_RRSETS == TEST_RRSIGS);
+
+		knot_rrset_t *rrsig = knot_rrset_new(owner,
+		                                         test_rrsigs[i].type,
+		                                         test_rrsigs[i].rclass,
+		                                         test_rrsigs[i].ttl);
+
+		tmp = knot_rdata_new();
+		item = malloc(sizeof(knot_rdata_item_t));
+		/* signature is just a string,
+		 * should be sufficient for testing */
+		item->raw_data = (uint16_t *)signature_strings[i];
+		knot_rdata_set_items(tmp, item, 1);
+		knot_rrset_add_rdata(rrsig, tmp);
+
+		if (knot_rrset_set_rrsigs(rrset, rrsig)
+		      != 0) {
+			diag("Could not set rrsig");
+			errors++;
+		}
+		errors += check_rrset(rrset, i, 0, 0, 1);
+		knot_rrset_free(&rrset);
+		free(item);
+		knot_rdata_free(&tmp);
+		knot_rrset_free(&rrsig);
+	}
+	return (errors == 0);
+}
+
+static int test_rrset_merge()
+{
+	knot_rrset_t *merger1;
+	knot_rrset_t *merger2;
+	knot_dname_t *owner1;
+	knot_dname_t *owner2;
+
+	int r;
+
+	owner1 = knot_dname_new_from_str(test_rrsets[3].owner,
+					   strlen(test_rrsets[3].owner), NULL);
+	merger1 = knot_rrset_new(owner1, test_rrsets[3].type,
+	                           test_rrsets[3].rclass,
+				   test_rrsets[3].ttl);
+
+	knot_rrset_add_rdata(merger1, test_rrsets[3].rdata);
+
+	owner2 = knot_dname_new_from_str(test_rrsets[4].owner,
+					   strlen(test_rrsets[4].owner), NULL);
+	merger2 = knot_rrset_new(owner2, test_rrsets[4].type,
+	                           test_rrsets[4].rclass,
+				   test_rrsets[4].ttl);
+
+	knot_rrset_add_rdata(merger2, test_rrsets[4].rdata);
+
+//	knot_rrset_dump(merger1, 1);
+
+	int ret = 0;
+	if ((ret = knot_rrset_merge((void **)&merger1,
+	                              (void **)&merger2)) != 0) {
+		diag("Could not merge rrsets. (reason %d)", ret);
+		return 0;
+	}
+
+//	knot_rrset_dump(merger1, 1);
+
+	r = check_rrset(merger1, 5, 1, 1, 0);
+
+	knot_rrset_free(&merger1);
+	knot_rrset_free(&merger2);
+
+	if (r) {
+		diag("Merged rdata are wrongly set.");
+		return 0;
+	}
+
+	return 1;
+}
+
+static int test_rrset_owner(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		char *dname_str =
+			knot_dname_to_str(knot_rrset_owner(rrsets[i]));
+		if (strcmp(dname_str, test_rrsets[i].owner)) {
+			diag("Got wrong value for owner from rrset.");
+			errors++;
+		}
+		free(dname_str);
+	}
+	return errors;
+}
+
+static int test_rrset_type(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		if (knot_rrset_type(rrsets[i]) != test_rrsets[i].type) {
+			errors++;
+			diag("Got wrong value for type from rrset.");
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_class(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		if (knot_rrset_class(rrsets[i]) != test_rrsets[i].rclass) {
+			errors++;
+			diag("Got wrong value for class from rrset.");
+		}
+	}
+
+	return errors;
+}
+
+static int test_rrset_ttl(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		if (knot_rrset_ttl(rrsets[i]) != test_rrsets[i].ttl) {
+			errors++;
+			diag("Got wrong value for ttl from rrset.");
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_ret_rdata(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+
+	knot_rrtype_descriptor_t *desc;
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+
+		desc = knot_rrtype_descriptor_by_type(rrsets[i]->type);
+		assert(desc);
+
+//		knot_rdata_dump(test_rrsets[i].rdata, 1);
+	//	knot_rdata_dump(rrsets[i]->rdata, 1);
+
+		if (knot_rdata_compare(knot_rrset_rdata(rrsets[i]),
+			                 test_rrsets[i].rdata,
+					 desc->wireformat)) {
+			errors++;
+			diag("Got wrong value for rdata from rrset.");
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_get_rdata(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+
+	knot_rrtype_descriptor_t *desc;
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		desc = knot_rrtype_descriptor_by_type(rrsets[i]->type);
+		assert(desc);
+		if (knot_rdata_compare(knot_rrset_get_rdata(rrsets[i]),
+			                 test_rrsets[i].rdata,
+					 desc->wireformat)) {
+			errors++;
+			diag("Got wrong value for rdata from rrset. (Get)");
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_ret_rrsigs(knot_rrset_t **rrsets)
+{
+	int errors = 0;
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		/* TODO should I test the insides of structure as well? */
+		if (knot_rrset_rrsigs(rrsets[i]) != test_rrsets[i].rrsigs) {
+			errors++;
+			diag("Got wrong value for rrsigs from rrset.");
+		}
+	}
+	return errors;
+}
+
+static int test_rrset_getters(uint type)
+{
+	int errors = 0;
+
+	knot_rrset_t *rrsets[TEST_RRSETS];
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		knot_dname_t *owner = knot_dname_new_from_str(
+		                            test_rrsets[i].owner,
+		                            strlen(test_rrsets[i].owner),
+		                            NODE_ADDRESS);
+		if (owner == NULL) {
+			diag("Error creating owner domain name!");
+			return 0;
+		}
+		rrsets[i] = knot_rrset_new(owner,
+		                             test_rrsets[i].type,
+		                             test_rrsets[i].rclass,
+		                             test_rrsets[i].ttl);
+
+		knot_rrset_add_rdata(rrsets[i], test_rrsets[i].rdata);
+	}
+
+	switch (type) {
+		case 0: {
+			errors += test_rrset_owner(rrsets);
+			break;
+		}
+		case 1: {
+			errors += test_rrset_type(rrsets);
+			break;
+		}
+		case 2: {
+			errors += test_rrset_class(rrsets);
+			break;
+		}
+		case 3: {
+			errors += test_rrset_ttl(rrsets);
+			break;
+		}
+		case 4: {
+			errors += test_rrset_ret_rdata(rrsets);
+			break;
+		}
+		case 5: {
+			errors += test_rrset_get_rdata(rrsets);
+			break;
+		}
+		case 6: {
+			errors += test_rrset_ret_rrsigs(rrsets);
+			break;
+		}
+	} /* switch */
+
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		knot_dname_free(&rrsets[i]->owner);
+		knot_rrset_free(&rrsets[i]);
+	}
+
+
+	return (errors == 0);
+}
+
+static int test_rrset_deep_free()
+{
+	/*!< \warning Cannot be run when some rdata are on stack! */
+	int errors = 0;
+
+	knot_rrset_t  *tmp_rrset;
+	knot_dname_t *owner;
+	for (int i = 0; i < TEST_RRSETS; i++) {
+		owner = knot_dname_new_from_str(
+		                            test_rrsets[i].owner,
+		                            strlen(test_rrsets[i].owner),
+		                            NODE_ADDRESS);
+		if (owner == NULL) {
+			diag("Error creating owner domain name!");
+			return 0;
+		}
+
+		tmp_rrset = knot_rrset_new(owner,
+		                             test_rrsets[i].type,
+		                             test_rrsets[i].rclass,
+		                             test_rrsets[i].ttl);
+
+		knot_rrset_add_rdata(tmp_rrset, test_rrsets[i].rdata);
+
+		knot_rrset_deep_free(&tmp_rrset, 1, 1, 0);
+
+		errors += (tmp_rrset != NULL);
+	}
+
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static const int KNOT_RRSET_TEST_COUNT = 13;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_rrset_tests_count(int argc, char *argv[])
+{
+	return KNOT_RRSET_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_rrset_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_final = 1;
+
+/*	for (int i = 0; i < 4; i++) {
+		knot_rdata_dump(&RR_RDATA[i], 2, 1);
+		printf("%p %p\n", &RR_RDATA[i], (&RR_RDATA)[i]->next);
+	} */
+
+	create_rdata();
+
+	res = test_rrset_create();
+	ok(res, "rrset: create");
+	res_final *= res;
+
+	skip(!res, 11);
+
+	todo();
+
+	ok(res = test_rrset_delete(), "rrset: delete");
+	//res_final *= res;
+
+	endtodo;
+
+	ok(res = test_rrset_getters(0), "rrset: owner");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(1), "rrset: type");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(2), "rrset: class");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(3), "rrset: ttl");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(4), "rrset: rdata");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(5), "rrset: get rdata");
+	res_final *= res;
+
+	ok(res = test_rrset_getters(6), "rrset: rrsigs");
+	res_final *= res;
+
+	ok(res = test_rrset_add_rdata(), "rrset: add_rdata");
+	res_final *= res;
+
+	ok(res = test_rrset_rrsigs(), "rrset: rrsigs manipulation");
+	res_final *= res;
+
+	ok(res = test_rrset_merge(), "rrset: rdata merging");
+	res_final *= res;
+
+	ok(res = test_rrset_deep_free(), "rrset: deep free");
+	res_final *= res;
+
+	endskip;	/* !res_create */
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/rrset_tests.h b/src/tests/libknot/libknot/rrset_tests.h
new file mode 100644
index 0000000..b0787d6
--- /dev/null
+++ b/src/tests/libknot/libknot/rrset_tests.h
@@ -0,0 +1,34 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file rrset_tests.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * Contains unit tests for RRSet (knot_rrset_t) and its API.
+ *
+ * Contains tests for:
+ * -
+ */
+#ifndef _KNOTD_RRSET_TESTS_H_
+#define _KNOTD_RRSET_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api rrset_tests_api;
+
+#endif /* _KNOTD_RRSET_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/zone_tests.c b/src/tests/libknot/libknot/zone_tests.c
new file mode 100644
index 0000000..2fdd61a
--- /dev/null
+++ b/src/tests/libknot/libknot/zone_tests.c
@@ -0,0 +1,853 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/libknot/zone_tests.h"
+#include "libknot/common.h"
+#include "libknot/zone/dname-table.h"
+#include "libknot/zone/zone.h"
+#include "libknot/util/error.h"
+#include "libknot/zone/node.h"
+
+static int knot_zone_tests_count(int argc, char *argv[]);
+static int knot_zone_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api zone_tests_api = {
+	"DNS library - zone",        //! Unit name
+	&knot_zone_tests_count,  //! Count scheduled tests
+	&knot_zone_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+enum { TEST_NODES_GOOD = 7, TEST_NODES_BAD = 1, TRAVERSAL_TYPES = 3};
+
+struct zone_test_node {
+	knot_dname_t owner;
+	knot_node_t *parent;
+};
+
+static struct zone_test_node test_apex =
+{{{}, (uint8_t *)"\3com\0", 5, (uint8_t *)"\x0", 1}, (knot_node_t *)NULL};
+
+static struct zone_test_node test_nodes_bad[TEST_NODES_BAD] = {
+	{{{},(uint8_t *)"\5other\6domain\0", 14, (uint8_t *)"\x0\x6", 2},
+	 (knot_node_t *)NULL}
+};
+
+static struct zone_test_node test_nodes_good[TEST_NODES_GOOD] = {
+	{{{}, (uint8_t *)"\7example\3com\0", 13, (uint8_t *)"\x0\x8", 2},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\3www\7example\3com\0", 17, (uint8_t *)"\x0\x4\xC", 3},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\7another\6domain\3com\0", 20, (uint8_t *)"\x0\x8\xF", 3},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\5mail1\7example\3com\0", 19, (uint8_t *)"\x0\x6\xE", 3},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\5mail2\7example\3com\0", 19, (uint8_t *)"\x0\x6\xE", 3},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\3smb\7example\3com\0", 17, (uint8_t *)"\x0\x4\xC", 3},
+	 (knot_node_t *)NULL},
+	{{{}, (uint8_t *)"\4smtp\7example\3com\0", 18, (uint8_t *)"\x0\x5\xD", 3},
+	 (knot_node_t *)NULL},
+};
+
+static int test_zone_check_node(const knot_node_t *node,
+                                const struct zone_test_node *test_node,
+                                int test_parent)
+{
+	return (node->owner == &test_node->owner) &&
+		((test_parent) ? node->parent == test_node->parent : 1);
+}
+
+static int test_zone_create(knot_zone_contents_t **zone)
+{
+//	knot_dname_t *dname = knot_dname_new_from_wire(
+//		test_apex.owner.name, test_apex.owner.size, NULL);
+//	assert(dname);
+
+	knot_node_t *node = knot_node_new(&test_apex.owner,
+	                                      test_apex.parent, 0);
+	if (node == NULL) {
+		diag("zone: Could not create zone apex.");
+		return 0;
+	}
+
+	*zone = knot_zone_contents_new(node, 0, 0, NULL);
+
+	if ((*zone) == NULL) {
+		diag("zone: Failed to create zone.");
+		knot_node_free(&node, 1, 0);
+		return 0;
+	}
+
+	if ((*zone)->apex != node) {
+		diag("zone: Zone apex not set right.");
+		knot_node_free(&node, 1, 0);
+		return 0;
+	}
+
+	return 1;
+}
+
+static int test_zone_add_node(knot_zone_contents_t *zone, int nsec3)
+{
+	/*
+	 * NSEC3 nodes are de facto identical to normal nodes, so there is no
+	 * need for separate tests. The only difference is where are they stored
+	 * in the zone structure.
+	 */
+
+	int errors = 0;
+	int res = 0;
+
+	//note("Good nodes");
+
+	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+		knot_node_t *node = knot_node_new(&test_nodes_good[i].owner,
+		                                     test_nodes_good[i].parent, 0);
+		if (node == NULL) {
+			diag("zone: Could not create node.");
+			return 0;
+		}
+
+		if ((res = ((nsec3) ? knot_zone_contents_add_nsec3_node(zone, node, 0, 0, 0)
+		                   : knot_zone_contents_add_node(zone, node, 0, 0, 0))) != 0) {
+			diag("zone: Failed to insert node into zone (returned"
+			     " %d).", res);
+			knot_node_free(&node, 0, 0);
+			++errors;
+		}
+		/* TODO check values in the node as well */
+	}
+
+	//note("Bad nodes");
+
+	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+		knot_node_t *node = knot_node_new(&test_nodes_bad[i].owner,
+		                                    test_nodes_bad[i].parent, 0);
+		if (node == NULL) {
+			diag("zone: Could not create node.");
+			return 0;
+		}
+
+		if ((res = ((nsec3) ? knot_zone_contents_add_nsec3_node(zone, node, 0, 0, 0)
+			: knot_zone_contents_add_node(zone, node, 0, 0, 0))) !=
+		                KNOT_EBADZONE) {
+			diag("zone: Inserting wrong node did not result in"
+			     "proper return value (%d instead of %d).", res,
+			     KNOT_EBADZONE);
+			++errors;
+		}
+		knot_node_free(&node, 0, 0);
+	}
+
+	//note("NULL zone");
+
+	note("Inserting into NULL zone...\n");
+
+	knot_node_t *node = knot_node_new(&test_nodes_good[0].owner,
+	                                      test_nodes_good[0].parent, 0);
+	if (node == NULL) {
+		diag("zone: Could not create node.");
+		return 0;
+	}
+
+	if ((res = ((nsec3) ? knot_zone_contents_add_nsec3_node(NULL, node, 0, 0, 0)
+		: knot_zone_contents_add_node(NULL, node, 0, 0, 0))) != KNOT_EBADARG) {
+		diag("zone: Inserting node to NULL zone did not result in"
+		     "proper return value (%d instead of %d)", res,
+		     KNOT_EBADARG);
+		++errors;
+	}
+
+	knot_node_free(&node, 0, 0);
+
+	//note("NULL node");
+	note("Inserting NULL node...\n");
+
+	if ((res = ((nsec3) ? knot_zone_contents_add_nsec3_node(zone, NULL, 0, 0, 0)
+		: knot_zone_contents_add_node(zone, NULL, 0, 0, 0))) != KNOT_EBADARG) {
+		diag("zone: Inserting NULL node to zone did not result in"
+		     "proper return value (%d instead of %d)", res,
+		     KNOT_EBADARG);
+		++errors;
+	}
+
+	if (!nsec3) {
+		//note("Inserting Apex again...\n");
+
+		node = knot_node_new(&test_apex.owner, test_apex.parent, 0);
+		if (node == NULL) {
+			diag("zone: Could not create node.");
+			return 0;
+		}
+
+		//note("Apex again");
+
+		if ((res = knot_zone_contents_add_node(zone, node, 0, 0, 0)) !=
+		                KNOT_EBADZONE) {
+			diag("zone: Inserting zone apex again did not result in"
+			     "proper return value (%d instead of -2)",
+			     KNOT_EBADZONE);
+			++errors;
+		}
+
+		knot_node_free(&node, 0, 0);
+	}
+
+	// check if all nodes are inserted
+	//int nodes = 0;
+	if (!nsec3
+	    && !test_zone_check_node(knot_zone_contents_apex(zone), &test_apex, !nsec3)) {
+		diag("zone: Apex of zone not right.");
+//		diag("Apex owner: %s (%p), apex parent: %p\n",
+//		     knot_dname_to_str(knot_zone_apex(zone)->owner),
+//		     knot_zone_apex(zone)->owner,
+//		     knot_zone_apex(zone)->parent);
+//		diag("Should be: owner: %s (%p), parent: %p\n",
+//		     knot_dname_to_str(&test_apex.owner),
+//		     &test_apex.owner,
+//		     test_apex.parent);
+		++errors;
+	}
+	//++nodes;
+	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+		const knot_node_t *n = ((nsec3) ? knot_zone_contents_find_nsec3_node(
+				zone, &test_nodes_good[i].owner) :
+			knot_zone_contents_find_node(zone, &test_nodes_good[i].owner));
+		if (n == NULL) {
+			diag("zone: Missing node with owner %s",
+			     test_nodes_good[i].owner.name);
+			++errors;
+			continue;
+		}
+
+		if (!test_zone_check_node(n, &test_nodes_good[i], !nsec3)) {
+			diag("zone: Node does not match: owner: %s (should be "
+			     "%s), parent: %p (should be %p)",
+			     n->owner->name, test_nodes_good[i].owner.name,
+			     n->parent, test_nodes_good[i].parent);
+			++errors;
+		}
+		//++nodes;
+	}
+
+	//note("zone: %d nodes in the zone (including apex)", nodes);
+
+	return (errors == 0);
+}
+
+static int test_zone_get_node(knot_zone_contents_t *zone, int nsec3)
+{
+	int errors = 0;
+
+	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+		if (((nsec3) ? knot_zone_contents_get_nsec3_node(
+		                   zone, &test_nodes_good[i].owner)
+			: knot_zone_contents_get_node(zone, &test_nodes_good[i].owner))
+			== NULL) {
+			diag("zone: Node (%s) not found in zone.",
+			     (char *)test_nodes_good[i].owner.name);
+			++errors;
+		}
+	}
+
+	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+		if (((nsec3) ? knot_zone_contents_get_nsec3_node(
+		                   zone, &test_nodes_bad[i].owner)
+			: knot_zone_contents_get_node(zone, &test_nodes_bad[i].owner))
+			!= NULL) {
+			diag("zone: Node (%s) found in zone even if it should"
+			     "not be there.",
+			     (char *)test_nodes_bad[i].owner.name);
+			++errors;
+		}
+	}
+
+	if (((nsec3)
+	     ? knot_zone_contents_get_nsec3_node(NULL, &test_nodes_good[0].owner)
+	     : knot_zone_contents_get_node(NULL, &test_nodes_good[0].owner)) != NULL) {
+		diag("zone: Getting node from NULL zone did not result in"
+		     "proper return value (NULL)");
+		++errors;
+	}
+
+	if (((nsec3) ? knot_zone_contents_get_nsec3_node(zone, NULL)
+	             : knot_zone_contents_get_node(zone, NULL)) != NULL) {
+		diag("zone: Getting node with NULL owner from zone did not "
+		     "result in proper return value (NULL)");
+		++errors;
+	}
+
+	if (!nsec3 && knot_zone_contents_get_node(zone, &test_apex.owner) == NULL) {
+		diag("zone: Getting zone apex from the zone failed");
+		++errors;
+	}
+
+	return (errors == 0);
+}
+
+static int test_zone_find_node(knot_zone_contents_t *zone, int nsec3)
+{
+	int errors = 0;
+
+	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+		if (((nsec3) ? knot_zone_contents_find_nsec3_node(
+		                   zone, &test_nodes_good[i].owner)
+		    : knot_zone_contents_find_node(zone, &test_nodes_good[i].owner))
+		    == NULL) {
+			diag("zone: Node (%s) not found in zone.",
+			     (char *)test_nodes_good[i].owner.name);
+			++errors;
+		}
+	}
+
+	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+		if (((nsec3) ? knot_zone_contents_find_nsec3_node(
+		                   zone, &test_nodes_bad[i].owner)
+		    : knot_zone_contents_find_node(zone, &test_nodes_bad[i].owner))
+		    != NULL) {
+			diag("zone: Node (%s) found in zone even if it should"
+			     "not be there.",
+			     (char *)test_nodes_bad[i].owner.name);
+			++errors;
+		}
+	}
+
+	if (((nsec3)
+	    ? knot_zone_contents_find_nsec3_node(NULL, &test_nodes_good[0].owner)
+	    : knot_zone_contents_find_node(NULL, &test_nodes_good[0].owner)) != NULL) {
+		diag("zone: Finding node from NULL zone did not result in"
+		     "proper return value (NULL)");
+		++errors;
+	}
+
+	if (((nsec3) ? knot_zone_contents_find_nsec3_node(zone, NULL)
+	             : knot_zone_contents_find_node(zone, NULL)) != NULL) {
+		diag("zone: Finding node with NULL owner from zone did not "
+		     "result in proper return value (NULL)");
+		++errors;
+	}
+
+	if (!nsec3 && knot_zone_contents_find_node(zone, &test_apex.owner) == NULL) {
+		diag("zone: Finding zone apex from the zone failed");
+		++errors;
+	}
+
+	return (errors == 0);
+}
+
+//static void test_zone_destroy_node_from_tree(knot_node_t *node,
+//                                             void *data)
+//{
+//	UNUSED(data);
+//	knot_node_free(&node, 0);
+//}
+
+/* explained below */
+static size_t node_index = 0;
+
+/*! \brief
+ * This function will overwrite parent field in node structure -
+ * we don't (and can't, with current structures) use it in these tests anyway.
+ * Since zone structure itself has no count field, only option known to me
+ * is (sadly) to use a global variable.
+ */
+static void tmp_apply_function(knot_node_t *node, void *data)
+{
+	node->parent = (knot_node_t *)node_index;
+	node_index++;
+}
+
+/* \note Since I am unaware of a way how to get a return value from traversal
+ * functions, I will use (hopefully for the last time here) global variable
+ */
+
+static int compare_ok = 1;
+
+static void tmp_compare_function(knot_node_t *node, void *data)
+{
+	/* node_index will start set to zero */
+	if (node->parent != (knot_node_t *)node_index) {
+		compare_ok = 0;
+		return;
+	} else if (!compare_ok) {
+		diag("Traversal function has partially set values right");
+	}
+	node->parent = NULL;
+	node_index++;
+}
+
+static int test_zone_tree_apply(knot_zone_contents_t *zone,
+                                int type, int nsec3)
+{
+
+	assert(node_index == 0);
+	assert(compare_ok == 1);
+
+	int (*traversal_func)(knot_zone_contents_t *zone,
+	                       void (*function)(knot_node_t *node,
+	                                        void *data),
+	                       void *data);
+
+	switch (type) {
+		case 0: {
+			if (nsec3) {
+				traversal_func =
+					&knot_zone_contents_nsec3_apply_postorder;
+				diag("Testing postorder traversal");
+			} else {
+				traversal_func =
+					&knot_zone_contents_tree_apply_postorder;
+				diag("Testing postorder traversal - NSEC3");
+			}
+			break;
+		}
+		case 1: {
+			if (nsec3) {
+				traversal_func =
+					&knot_zone_contents_nsec3_apply_inorder;
+				diag("Testing inorder traversal");
+			} else {
+				traversal_func =
+					&knot_zone_contents_tree_apply_inorder;
+				diag("Testing inorder traversal - NSEC3");
+			}
+			break;
+		}
+		case 2: {
+			if (nsec3) {
+				traversal_func =
+				&knot_zone_contents_nsec3_apply_inorder_reverse;
+				diag("Testing inorder reverse traversal");
+			} else {
+				traversal_func =
+				&knot_zone_contents_tree_apply_inorder_reverse;
+				diag("Testing inorder reverse "
+				     "traversal - NSEC3");
+			}
+			break;
+		}
+		default: {
+			diag("Unknown traversal function type");
+			return 0;
+		}
+	}
+
+	/*
+	 * This will iterate through tree and set node->parent field values
+	 * from 0 to number of nodes.
+	 */
+
+	traversal_func(zone, &tmp_apply_function, NULL);
+
+	node_index = 0;
+
+	/*
+	 * This will check whether the values were set accordingly.
+	 */
+
+	traversal_func(zone, &tmp_compare_function, NULL);
+
+	int ret = compare_ok;
+
+	compare_ok = 1;
+	node_index = 0;
+
+	return (ret);
+}
+
+/* Tests all kinds of zone traversals, explainded above */
+static int test_zone_traversals(knot_zone_contents_t *zone)
+{
+	for (int i = 0; i < TRAVERSAL_TYPES; i++) {
+		for (int j = 0; j < 2; j++) {
+			if (!test_zone_tree_apply(zone, i, j)) {
+				return 0;
+			}
+		}
+	}
+	return 1;
+}
+
+struct zone_test_param {
+	/* Times 2 so that we don't have to mess with mallocs. */
+	knot_node_t *knot_node_array[TEST_NODES_GOOD * 5];
+	knot_dname_t *table_node_array[TEST_NODES_GOOD * 5];
+	size_t count;
+};
+
+static void tree_node_to_array(knot_node_t *node, void *data)
+{
+	struct zone_test_param *param = (struct zone_test_param *)data;
+	param->knot_node_array[param->count++] = node;
+}
+
+static void tree_dname_node_to_array(knot_dname_t *node,
+                                     void *data)
+{
+	struct zone_test_param *param = (struct zone_test_param *)data;
+	param->table_node_array[param->count++] = node;
+}
+
+extern int compare_wires_simple(uint8_t *w1, uint8_t *w2, uint count);
+static int test_zone_shallow_copy()
+{
+	int errors = 0;
+	int lived = 0;
+	knot_dname_t *apex_dname =
+		knot_dname_new_from_str("a.ns.nic.cz.",
+	                                  strlen("a.ns.nic.cz"), NULL);
+	assert(apex_dname);
+	knot_node_t *apex_node =
+		knot_node_new(apex_dname, NULL, 0);
+	assert(apex_node);
+	lives_ok({
+		if (knot_zone_contents_shallow_copy(NULL, NULL) != KNOT_EBADARG) {
+			diag("Calling zone_shallow_copy with NULL "
+			     "arguments did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		knot_zone_contents_t *zone = knot_zone_contents_new(apex_node,
+									0, 1, 0);
+		if (knot_zone_contents_shallow_copy(zone, NULL) != KNOT_EBADARG) {
+			diag("Calling zone_shallow_copy with NULL destination "
+			     "zone argument did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_contents_shallow_copy(NULL, &zone) != KNOT_EBADARG) {
+			diag("Calling zone_shallow_copy with NULL source "
+			     "zone argument did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_contents_shallow_copy(zone, &zone) != KNOT_EBADARG) {
+			diag("Calling zone_shallow_copy with identical source "
+			 "and destination zone did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+		knot_zone_contents_free(&zone);
+	}, "zone: shallow copy NULL tests");
+	errors += lived != 1;
+
+	knot_dname_t *d = knot_dname_deep_copy(&test_nodes_good[0].owner);
+	if (d == NULL) {
+		return 0;
+	}
+	knot_node_t *n = knot_node_new(d, NULL, 0);
+	
+	/* example.com. */
+//	knot_zone_t *from_zone =
+//		knot_zone_new(knot_node_new(&test_nodes_good[0].owner,
+//				test_nodes_good[0].parent, 0), 10, 1);
+	knot_zone_t *from_zone = knot_zone_new(n, 10, 1);
+	knot_zone_contents_t *from = knot_zone_get_contents(from_zone);
+
+	/* Add nodes to zone. */
+	for (int i = 1; i < TEST_NODES_GOOD; ++i) {
+		knot_dname_t *d = knot_dname_deep_copy(&test_nodes_good[i].owner);
+		if (d == NULL) {
+			return 0;
+		}
+		knot_node_t *node = knot_node_new(d, test_nodes_good[i].parent,
+		                                  0);
+		if (node == NULL) {
+			diag("zone: Could not create node.");
+			return 0;
+		}
+
+		if (knot_zone_contents_add_node(from, node, 1, 1, 1) != KNOT_EOK) {
+			diag("zone: Could not add node. %s",
+			     knot_dname_to_str(node->owner));
+//			return 0;
+		}
+	}
+
+	/* Make a copy of zone */
+	knot_zone_contents_t *to = NULL;
+	int ret = 0;
+	if ((ret = knot_zone_contents_shallow_copy(from, &to) != KNOT_EOK)) {
+		diag("Could not copy zone! %s", knot_strerror(ret));
+		return 0;
+	}
+
+	assert(to);
+
+	/* Compare non-tree parts of the zone. */
+//	if (from->data != to->data) {
+//		diag("Zone data field wrong after shallow copy!");
+//		errors++;
+//	}
+
+//	if (from->dtor != to->dtor) {
+//		diag("Zone data destructor field wrong after shallow copy!");
+//		errors++;
+//	}
+
+	if (from->node_count != to->node_count) {
+		diag("Zone node count data field wrong after shallow copy!");
+		errors++;
+	}
+
+//	if (from->version != to->version) {
+//		diag("Zone version data field wrong after shallow copy!");
+//		errors++;
+//	}
+
+	if (from->apex != to->apex) {
+		diag("Zone apex differ after shallow copy!");
+	}
+
+	if (compare_wires_simple((uint8_t *)(&from->nsec3_params),
+	                         (uint8_t *)(&to->nsec3_params),
+	                         sizeof(from->nsec3_params)) != 0) {
+		diag("Nsec3_params data field wrong after shallow copy!");
+		errors++;
+	}
+
+	if (from->nodes == to->nodes) {
+		diag("Copied zones have identical trees!");
+		errors++;
+	}
+
+	if (from->nsec3_nodes == to->nsec3_nodes) {
+		diag("Copied zones have identical trees!");
+		errors++;
+	}
+
+	/* Compare nodes, convert tree to array then compare those arrays. */
+	struct zone_test_param param1;
+	memset(&param1, 0, sizeof(struct zone_test_param));
+
+	knot_zone_contents_tree_apply_inorder(from, tree_node_to_array,
+						(void *)&param1);
+
+	struct zone_test_param param2;
+	memset(&param2, 0, sizeof(struct zone_test_param));
+
+	knot_zone_contents_tree_apply_inorder(to, tree_node_to_array,
+						(void *)&param2);
+
+	if (param1.count != param2.count) {
+		diag("wrong tree");
+		return 0;
+	}
+
+	for (int i = 0; i < param1.count; i++) {
+		if (param1.knot_node_array[i] !=
+		    param2.knot_node_array[i]) {
+			diag("wrong tree");
+			return 0;
+		}
+	}
+
+	param1.count = 0;
+	knot_dname_table_tree_inorder_apply(from->dname_table,
+	                                       tree_dname_node_to_array,
+	                                       (void *)&param1);
+
+	param2.count = 0;
+	knot_dname_table_tree_inorder_apply(to->dname_table,
+	                                      tree_dname_node_to_array,
+	                                      (void *)&param2);
+
+	if (param1.count != param2.count) {
+		diag("wrong table count");
+		return 0;
+	}
+
+	for (int i = 0; i < param1.count; i++) {
+		if (param1.table_node_array[i] != param2.table_node_array[i]) {
+			diag("wrong table nodes");
+			errors++;
+		}
+	}
+
+#ifdef USE_HASH_TABLE
+	if (from->table) {
+		if (from->table == to->table) {
+			diag("hash tables after shallow copy are identical!");
+			return 0;
+		}
+		uint i;
+		if (hashsize(from->table->table_size_exp) !=
+		                hashsize(to->table->table_size_exp)) {
+			diag("hash tables after shallow copy error!");
+			return 0;
+		}
+
+		if (from->table->table_count != to->table->table_count) {
+			diag("hash tables after shallow copy error!");
+			return 0;
+		}
+
+		for (uint t = 0; t < from->table->table_count; ++t) {
+			for (i = 0; i <
+			     hashsize(from->table->table_size_exp); i++) {
+				if (from->table->tables[t][i] == NULL) {
+					if (to->table->tables[t][i] != NULL) {
+						diag("hash table item error");
+					}
+					continue;
+				}
+				if ((from->table->tables[t])[i]->key_length !=
+				    (to->table->tables[t])[i]->key_length) {
+					diag("hash table key lengths error!");
+					return 0;
+				}
+				if ((from->table->tables[t])[i]->key !=
+				    (to->table->tables[t])[i]->key) {
+					diag("hash table key error!");
+					return 0;
+				}
+				if ((from->table->tables[t])[i]->value !=
+				    (to->table->tables[t])[i]->value) {
+					diag("hash table value error!");
+					return 0;
+				}
+			}
+		}
+
+		ck_stash_item_t *item1 = from->table->stash;
+		ck_stash_item_t *item2 = to->table->stash;
+		while (item1 != NULL && item2 != NULL) {
+			if (item1->item->key_length !=
+			    item2->item->key_length) {
+				diag("hash stash key length error!");
+				return 0;
+			}
+			if (item1->item->key != item2->item->key) {
+				diag("hash stash key error!");
+				return 0;
+			}
+			if (item1->item->value != item2->item->value) {
+				diag("hash stash value error!");
+				return 0;
+			}
+
+			item1 = item1->next;
+			item2 = item2->next;
+		}
+	} else {
+		if (to->table) {
+			diag("Hash table is not set to NULL "
+			     "after shallow copy!");
+			errors++;
+		}
+	}
+#endif
+
+//	knot_zone_deep_free(&from_zone, 0);
+//	knot_zone_contents_free(&to);
+	return (errors == 0);
+
+}
+
+//static int test_zone_free(knot_zone_t **zone)
+//{
+//	knot_zone_tree_apply_postorder(*zone,
+//	                                 test_zone_destroy_node_from_tree,
+//	                                 NULL);
+//	knot_zone_nsec3_apply_postorder(*zone,
+//	                                 test_zone_destroy_node_from_tree,
+//	                                 NULL);
+//	knot_zone_free(zone);
+//	return (*zone == NULL);
+//}
+
+static const int KNOT_ZONE_TEST_COUNT = 10;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_zone_tests_count(int argc, char *argv[])
+{
+	return KNOT_ZONE_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_zone_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_final = 0;
+
+	knot_zone_contents_t *zone = NULL;
+
+	ok((res = test_zone_create(&zone)), "zone: create");
+	res_final *= res;
+
+	skip(!res, 6);
+
+	ok((res = test_zone_add_node(zone, 0)), "zone: add node");
+	res_final *= res;
+
+	skip(!res, 2);
+
+	ok((res = test_zone_get_node(zone, 0)), "zone: get node");
+	res_final *= res;
+
+	skip(!res, 1);
+
+	ok((res = test_zone_find_node(zone, 0)), "zone: find node");
+	res_final *= res;
+
+	endskip; // get node failed
+
+	endskip; // add node failed
+
+	ok((res = test_zone_add_node(zone, 1)), "zone: add nsec3 node");
+	res_final *= res;
+
+	skip(!res, 2);
+
+	ok((res = test_zone_get_node(zone, 1)), "zone: get nsec3 node");
+	res_final *= res;
+
+	skip(!res, 1);
+
+	ok((res = test_zone_find_node(zone, 1)), "zone: find nsec3 node");
+	res_final *= res;
+
+	endskip; // get nsec3 node failed
+
+	endskip; // add nsec3 node failed
+
+	ok(res = test_zone_traversals(zone), "zone: traversals");
+	res_final *= res;
+
+	ok((res = test_zone_shallow_copy()), "zone: shallow copy");
+	res_final *= res;
+
+//	ok((res = test_zone_free(&zone)), "zone: free");
+//	res_final *= res;
+
+	endskip; // create failed
+
+	return res_final;
+}
diff --git a/src/tests/libknot/libknot/zone_tests.h b/src/tests/libknot/libknot/zone_tests.h
new file mode 100644
index 0000000..5539709
--- /dev/null
+++ b/src/tests/libknot/libknot/zone_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ZONE_TESTS_H_
+#define _KNOTD_ZONE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api zone_tests_api;
+
+#endif /* _KNOTD_ZONE_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/zone_tree_tests.c b/src/tests/libknot/libknot/zone_tree_tests.c
new file mode 100644
index 0000000..c26746e
--- /dev/null
+++ b/src/tests/libknot/libknot/zone_tree_tests.c
@@ -0,0 +1,758 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <assert.h>
+
+#include "tests/libknot/libknot/zone_tree_tests.h"
+#include "libknot/zone/zone-tree.h"
+#include "libknot/util/error.h"
+
+static int knot_zone_tree_tests_count(int argc, char *argv[]);
+static int knot_zone_tree_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api zone_tree_tests_api = {
+	"DNS library - zone tree",        //! Unit name
+	&knot_zone_tree_tests_count,  //! Count scheduled tests
+	&knot_zone_tree_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+static int test_tree_init()
+{
+	int errors = 0;
+	int lived = 0;
+
+	lives_ok({
+		if (knot_zone_tree_init(NULL) != KNOT_EBADARG) {
+			diag("Calling knot_zone_tree_init with NULL "
+			     "tree did not return KNOT_EBADARG!");
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: init NULL tests");
+	errors += lived != 1;
+
+	return (errors == 0);
+}
+
+static int test_tree_insert()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+	knot_node_t *node =
+		knot_node_new(knot_dname_new_from_str("a.ns.nic.cz.",
+	                                              strlen("a.ns.nic.cz."),
+	                                              NULL),
+	                                              NULL, 0);
+	assert(node);
+
+	lives_ok({
+		if (knot_zone_tree_insert(NULL, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_insert(tree, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_insert(NULL, node) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: insert NULL tests");
+	if (errors) {
+		diag("Zone tree insert did not return KNOT_EBADARG "
+		     "when given wrong arguments");
+	}
+	errors += lived != 1;
+
+	if (knot_zone_tree_insert(tree, node) != KNOT_EOK) {
+		diag("Calling zone tree insert with valid arguments "
+		     "did not return KNOT_EOK");
+		errors++;
+	}
+
+	/* Sorting will be tested in traversal functions. */
+	return (errors == 0);
+}
+
+static int test_tree_finding()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+	const knot_node_t *node =
+		knot_node_new(knot_dname_new_from_str("a.ns.nic.cz.",
+	                                              strlen("a.ns.nic.cz."),
+	                                              NULL),
+	                                              NULL, 0);
+	assert(node);
+
+	lives_ok({
+		if (knot_zone_tree_find(NULL, NULL, NULL) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_find(tree, NULL, NULL) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_find(tree, node->owner,
+		                        NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		const knot_node_t *found_node = NULL;
+		lived = 0;
+		if (knot_zone_tree_find(NULL, node->owner,
+		                        &found_node) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_find(tree, NULL,
+		                        &found_node) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: find NULL tests");
+	if (errors) {
+		diag("Zone tree find did not return KNOT_EBADARG "
+		     "when given wrong arguments");
+	}
+
+	errors += lived != 1;
+
+	/* Insert node */
+	assert(knot_zone_tree_insert(tree, (knot_node_t *)node) == KNOT_EOK);
+
+	knot_node_t *found_node = NULL;
+	if (knot_zone_tree_find(tree, node->owner,
+	                        (const knot_node_t **)&found_node) !=
+	    KNOT_EOK) {
+		diag("Calling zone tree find with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree find did not return right node");
+		errors++;
+	}
+
+	if (knot_zone_tree_get(tree, node->owner, &found_node) !=
+	    KNOT_EOK) {
+		diag("Calling zone tree get with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree get did not return right node");
+		errors++;
+	}
+
+	/* Try to search for node not in tree. */
+	knot_dname_t *alien_dname =
+		knot_dname_new_from_str("this.name.is.not.in.the.tree.",
+	                                strlen("this.name.is.not.in.the.tree."),
+	                                NULL);
+
+	if (knot_zone_tree_find(tree, alien_dname,
+	                        (const knot_node_t **)&found_node) !=
+	    KNOT_EOK) {
+		diag("Calling zone tree find with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != NULL) {
+		diag("Zone tree find returned node that was not in the tree!");
+		errors++;
+	}
+
+	if (knot_zone_tree_get(tree, alien_dname, &found_node) !=
+	    KNOT_EOK) {
+		diag("Calling zone tree get with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != NULL) {
+		diag("Zone tree get returned node that was not in the tree!");
+		errors++;
+	}
+
+	return (errors == 0);
+}
+
+static int test_tree_finding_less_or_equal()
+{
+	diag("Issue nr.: 1145");
+	int errors = 0;
+	int lived = 0;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+	const knot_node_t *node =
+		knot_node_new(knot_dname_new_from_str("a.ns.nic.cz.",
+	                                              strlen("a.ns.nic.cz"),
+	                                              NULL),
+	                                              NULL, 0);
+	assert(node);
+
+	lives_ok({
+		if (knot_zone_tree_find_less_or_equal(NULL,
+	                                              NULL,
+	                                              NULL,
+	                                              NULL, 0) !=
+	            KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_find_less_or_equal(tree, NULL,
+		                                      NULL, NULL, 0) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_find_less_or_equal(tree,
+		                                      node->owner,
+		                                      NULL,
+		                                      NULL, 0) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		const knot_node_t *found_node = NULL;
+		lived = 0;
+		if (knot_zone_tree_find_less_or_equal(NULL, node->owner,
+		                        &found_node, NULL, 0) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		const knot_node_t *previous_node = NULL;
+		lived = 0;
+		if (knot_zone_tree_find_less_or_equal(tree, NULL,
+		                        &found_node,
+		                        &previous_node, 0) !=
+		    KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: tree find less or equal NULL tests");
+	if (errors) {
+		diag("Zone tree find did not return KNOT_EBADARG "
+		     "when given wrong arguments");
+	}
+
+	if (!lived) {
+		errors++;
+	}
+
+	const knot_node_t *previous_node = NULL;
+
+	/* Insert node - exact match. */
+	assert(knot_zone_tree_insert(tree, (knot_node_t *)node) == KNOT_EOK);
+
+
+	const knot_node_t *found_node = NULL;
+	if (knot_zone_tree_find_less_or_equal(tree,
+	                                      node->owner,
+	                                      &found_node,
+	                                      &previous_node, 0) <= 0) {
+		diag("Calling zone tree find less with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree find did not return right node");
+		errors++;
+	}
+
+	if (knot_zone_tree_get_less_or_equal(tree, node->owner,
+	                                     (knot_node_t **)&found_node,
+	                                     (knot_node_t **)&previous_node, 0) <=
+	    0) {
+		diag("Calling zone tree get less with valid arguments did "
+		     "not return KNOT_EOK");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree get less did not return right node");
+		errors++;
+	}
+
+	knot_dname_t *less_dname =
+		knot_dname_new_from_str("ns.nic.cz.",
+		                        strlen("ns.nic.cz."),
+		                        NULL);
+
+	assert(knot_dname_compare(less_dname, node->owner) < 0);
+
+	if (knot_zone_tree_find_less_or_equal(tree,
+	                                      less_dname,
+	                                      &found_node,
+	                                      &previous_node, 0) <= 0) {
+		diag("Calling zone tree find less or equal "
+		     "with valid arguments did "
+		     "not return > 0");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree find less or equal did not return right node");
+		errors++;
+	}
+
+	if (knot_zone_tree_get_less_or_equal(tree, less_dname,
+	                                     (knot_node_t **)&found_node,
+	                                     (knot_node_t **)&previous_node, 0) <=
+	    0) {
+		diag("Calling zone tree less or equal with valid arguments did "
+		     "not return > 0");
+		errors++;
+	}
+
+	if (found_node != node) {
+		diag("Zone tree get less or equal did not return right node");
+		errors++;
+	}
+
+	/* Try to search for node not in tree. */
+	knot_dname_t *alien_dname =
+		knot_dname_new_from_str("this.name.is.not.in.the.tree.",
+	                                strlen("this.name.is.not.in.the.tree."),
+	                                NULL);
+
+	if (knot_zone_tree_find_less_or_equal(tree, alien_dname,
+	                                      &found_node,
+	                                      &previous_node, 0) !=
+	    0) {
+		diag("Calling zone tree find less with valid arguments did "
+		     "not return 0");
+		errors++;
+	}
+
+	if (knot_zone_tree_get_less_or_equal(tree,
+	                                     alien_dname,
+	                                     (knot_node_t **)&found_node,
+	                                     (knot_node_t **)&previous_node, 0) !=
+	    0) {
+		diag("Calling zone tree get with valid arguments did "
+		     "not return 0");
+		errors++;
+	}
+
+	/* Set node previous label. */
+	knot_node_t *tmp_node =
+		knot_node_new(knot_dname_new_from_str("ns.nic.cz.",
+	                                              strlen("ns.nic.cz"),
+	                                              NULL), NULL, 0);
+	assert(tmp_node);
+	knot_node_set_parent((knot_node_t *)node, tmp_node);
+
+	if (knot_zone_tree_find_less_or_equal(tree, node->owner,
+	                                      &found_node,
+	                                      &previous_node, 0) <=
+	    0) {
+		diag("Calling zone tree find with valid arguments did "
+		     "not return > 0");
+		errors++;
+	}
+
+	if (found_node != node || previous_node != tmp_node) {
+		diag("Zone tree find did not return valid nodes!");
+		errors++;
+	}
+
+
+	if (knot_zone_tree_get_less_or_equal(tree, node->owner,
+	                                    (knot_node_t **)&found_node,
+	                                    (knot_node_t **)&previous_node, 0) <=
+	    0) {
+		diag("Calling zone tree get with valid arguments did "
+		     "not return > 0");
+		errors++;
+	}
+
+	if (found_node != node || previous_node != tmp_node) {
+		diag("Zone get find did not return valid nodes!");
+		errors++;
+	}
+
+	return (errors == 0);
+}
+
+static int test_tree_remove()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+	knot_node_t *node =
+		knot_node_new(knot_dname_new_from_str("a.ns.nic.cz.",
+	                                              strlen("a.ns.nic.cz"),
+	                                              NULL),
+	                                              NULL, 0);
+	assert(node);
+
+	/* Add node. */
+	int ret = knot_zone_tree_insert(tree, node);
+	assert(ret == 0);
+	assert(ret == 0);
+
+	lives_ok({
+		if (knot_zone_tree_remove(NULL, NULL, NULL) !=
+		    KNOT_EBADARG) {
+			 errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_remove(tree, NULL, NULL) !=
+		     KNOT_EBADARG) {
+			  errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_remove(tree, node->owner, NULL) !=
+		     KNOT_EBADARG) {
+			  errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_remove(NULL, node->owner, NULL) !=
+		     KNOT_EBADARG) {
+			  errors++;
+		}
+		lived = 1;
+		knot_zone_tree_node_t *deleted_node = NULL;
+		lived = 0;
+		if (knot_zone_tree_remove(NULL, node->owner, &deleted_node) !=
+		     KNOT_EBADARG) {
+			  errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_remove(tree, NULL, &deleted_node) !=
+		     KNOT_EBADARG) {
+			  errors++;
+		}
+		lived = 1;
+	}, "zone tree: remove NULL tests");
+	if (errors) {
+		diag("Zone tree remove did not return KNOT_EBADARG "
+		     "when given wrong arguments");
+	}
+
+	errors += lived != 1;
+
+	knot_zone_tree_node_t *removed_node = NULL;
+
+	/* Remove previously inserted node. */
+	if (knot_zone_tree_remove(tree, node->owner, &removed_node) !=
+	    KNOT_EOK) {
+		diag("Could not remove previously inserted node!");
+		errors++;
+	}
+
+	if (removed_node == NULL || removed_node->node != node) {
+		diag("Wrong node was removed!");
+		errors++;
+	}
+
+	/*
+	 * Try remove the node again - it should not be there and
+	 * removed_node should be NULL.
+	 */
+
+	if (knot_zone_tree_remove(tree, node->owner, &removed_node) !=
+	    KNOT_EOK) {
+		diag("Could not remove previously inserted node!");
+		errors++;
+	}
+
+	if (removed_node != NULL) {
+		diag("Zone tree remove returned previously removed node!");
+		errors++;
+	}
+
+	return (errors == 0);
+
+}
+
+struct test_zone_tree_args {
+	knot_node_t *array[10 * 1024];
+	size_t count;
+};
+
+static void add_to_array(knot_zone_tree_node_t *node, void *data)
+{
+	struct test_zone_tree_args *args =
+		(struct test_zone_tree_args *)data;
+	args->array[args->count++] = node->node;
+}
+
+static int test_traversal(knot_node_t **nodes,
+                          size_t node_count,
+                          uint code)
+{
+	int errors = 0;
+	int lived = 0;
+
+	int (*trav_func)(knot_zone_tree_t *,
+	                  void (*)(knot_zone_tree_node_t *, void *),
+	                  void *);
+
+	trav_func = (code) ? knot_zone_tree_reverse_apply_inorder :
+	                     knot_zone_tree_forward_apply_inorder;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+
+	lives_ok({
+		if (trav_func(NULL, NULL, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (trav_func(tree, NULL, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (trav_func(NULL, add_to_array, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: traversal NULL tests");
+
+	if (errors) {
+		diag("Traversal function did not return KNOT_EBADARG "
+		     "when given NULL parameters");
+	}
+
+	errors += lived != 1;
+
+	/* Add nodes to tree. */
+	for (int i = 0; i < node_count; i++) {
+		assert(knot_zone_tree_insert(tree, nodes[i]) == KNOT_EOK);
+	}
+
+	struct test_zone_tree_args args;
+	args.count = 0;
+
+	trav_func(tree, add_to_array, &args);
+
+	if (args.count != node_count) {
+		diag("Traversal function traversed more nodes than it "
+		     "should have!");
+		return ++errors;
+	}
+
+	for (int i = 0; i < node_count; i++) {
+		int match = nodes[i] == args.array[i];
+		if (!match) {
+			diag("Traversal function returned nodes in wrong "
+			     "order!");
+			errors++;
+		}
+	}
+
+	return errors;
+}
+
+static int test_tree_traversals()
+{
+	/*!< \todo I can test inorder and reverse inorder, but I don't know
+	 * how to test others. It is somehow tested in zone tests. */
+	int errors = 0;
+
+	/* Create few nodes. (5 should be enough) */
+	knot_node_t *nodes[5];
+	for (int i = 0; i < 5; i++) {
+		char owner_string[20];
+		owner_string[0] = i + '0';
+		memcpy(owner_string + 1, ".ns.test.cz.",
+		       strlen(".ns.test.cz.") + 1);
+		nodes[i] =
+			knot_node_new(knot_dname_new_from_str(owner_string,
+							strlen(owner_string),
+							NULL), NULL, 0);
+	}
+
+	if (test_traversal(nodes, 5, 0)) {
+		diag("Inorder traversal failed");
+		errors++;
+	}
+
+	for (int i = 0; i < 5; i++) {
+		char owner_string[20];
+		owner_string[0] = (5 - i) + '0';
+		memcpy(owner_string + 1, ".ns.test.cz.",
+		       strlen(".ns.test.cz.") + 1);
+		nodes[i] =
+			knot_node_new(knot_dname_new_from_str(owner_string,
+							strlen(owner_string),
+							NULL), NULL, 0);
+	}
+
+	if (test_traversal(nodes, 5, 1)) {
+		diag("Reverse inorder traversal failed");
+		errors++;
+	}
+
+	return (errors == 0);
+}
+
+static int test_tree_shallow_copy()
+{
+	int errors = 0;
+	int lived = 0;
+
+	knot_zone_tree_t *tree = malloc(sizeof(knot_zone_tree_t));
+	assert(tree);
+	knot_zone_tree_init(tree);
+
+	lives_ok({
+		if (knot_zone_tree_shallow_copy(NULL, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_shallow_copy(tree, NULL) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+		lived = 0;
+		if (knot_zone_tree_shallow_copy(NULL, tree) != KNOT_EBADARG) {
+			errors++;
+		}
+		lived = 1;
+	}, "zone tree: shallow copy NULL tests");
+	if (errors) {
+		diag("Zone tree shallow copy did not return KNOT_EBADARG when "
+		     "given NULL arguments");
+	}
+	errors += lived != 1;
+
+	/* Create few nodes. (5 should be enough) */
+	knot_node_t *nodes[5];
+	for (int i = 0; i < 5; i++) {
+		char owner_string[20];
+		owner_string[0] = i + '0';
+		memcpy(owner_string + 1, ".ns.test.cz.",
+		       strlen(".ns.test.cz.") + 1);
+		nodes[i] =
+			knot_node_new(knot_dname_new_from_str(owner_string,
+							strlen(owner_string),
+							NULL), NULL, 0);
+		/* Insert node to tree. */
+		assert(knot_zone_tree_insert(tree, nodes[i]) == KNOT_EOK);
+	}
+
+	/* Create shallow copy. */
+	knot_zone_tree_t *new_tree = malloc(sizeof(knot_zone_tree_t));
+	assert(new_tree);
+	knot_zone_tree_init(new_tree);
+
+	if (knot_zone_tree_shallow_copy(tree, new_tree) != KNOT_EOK) {
+		diag("Zone tree shallow copy did not return KNOT_EOK "
+		     "when executed with valid parameters");
+		return 0;
+	}
+
+	/* Traverse the tree twice and check that arrays are the same. */
+	struct test_zone_tree_args args1;
+	args1.count = 0;
+
+	knot_zone_tree_forward_apply_inorder(tree, add_to_array,
+	                                     &args1);
+
+
+	struct test_zone_tree_args args2;
+	args2.count = 0;
+	knot_zone_tree_forward_apply_inorder(new_tree, add_to_array,
+	                                     &args2);
+
+	if (args1.count != args2.count) {
+		diag("Zone tree created by shallow copy has wrong count"
+		     "of nodes");
+		return 0;
+	}
+
+	for (int i = 0; i < args1.count; i++) {
+		if (args1.array[i] != args2.array[i]) {
+			diag("Zone tree created by shallow copy has wrong "
+			     "nodes");
+			errors++;
+		}
+	}
+
+	return (errors == 0);
+
+}
+
+
+static const int KNOT_ZONE_TREE_TEST_COUNT = 14;
+
+static int knot_zone_tree_tests_count(int argc, char *argv[])
+{
+	return KNOT_ZONE_TREE_TEST_COUNT;
+}
+
+static int knot_zone_tree_tests_run(int argc, char *argv[])
+{
+	ok(test_tree_init(), "zone tree: init");
+	ok(test_tree_insert(), "zone tree: insertion");
+	ok(test_tree_finding(), "zone tree: finding");
+	todo();
+	ok(test_tree_finding_less_or_equal(), "zone tree: find less or equal");
+	endtodo;
+	ok(test_tree_remove(), "zone tree: removal");
+	ok(test_tree_traversals(), "zone tree: traversals");
+	ok(test_tree_shallow_copy(), "zone tree: shallow copy");
+
+	return 1;
+}
diff --git a/src/tests/libknot/libknot/zone_tree_tests.h b/src/tests/libknot/libknot/zone_tree_tests.h
new file mode 100644
index 0000000..4cea88c
--- /dev/null
+++ b/src/tests/libknot/libknot/zone_tree_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTDZONE_TREE_TESTS_H_
+#define _KNOTDZONE_TREE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api zone_tree_tests_api;
+
+#endif /* _KNOTDZONE_TREE_TESTS_H_ */
diff --git a/src/tests/libknot/libknot/zonedb_tests.c b/src/tests/libknot/libknot/zonedb_tests.c
new file mode 100644
index 0000000..7b45587
--- /dev/null
+++ b/src/tests/libknot/libknot/zonedb_tests.c
@@ -0,0 +1,44 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tests/libknot/libknot/zonedb_tests.h"
+
+
+static int zonedb_tests_count(int argc, char *argv[]);
+static int zonedb_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api zonedb_tests_api = {
+	"Zone database",      //! Unit name
+	&zonedb_tests_count,  //! Count scheduled tests
+	&zonedb_tests_run     //! Run scheduled tests
+};
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int zonedb_tests_count(int argc, char *argv[])
+{
+	return 0;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int zonedb_tests_run(int argc, char *argv[])
+{
+	return 0;
+}
diff --git a/src/tests/libknot/libknot/zonedb_tests.h b/src/tests/libknot/libknot/zonedb_tests.h
new file mode 100644
index 0000000..0c4f8ef
--- /dev/null
+++ b/src/tests/libknot/libknot/zonedb_tests.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ZONEDB_TESTS_H_
+#define _KNOTD_ZONEDB_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api zonedb_tests_api;
+
+#endif /* _KNOTD_ZONEDB_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/files/parsed_data b/src/tests/libknot/realdata/files/parsed_data
new file mode 100644
index 0000000..fe22b90
--- /dev/null
+++ b/src/tests/libknot/realdata/files/parsed_data
diff --git a/src/tests/libknot/realdata/files/parsed_data_queries b/src/tests/libknot/realdata/files/parsed_data_queries
new file mode 100644
index 0000000..5857c87
--- /dev/null
+++ b/src/tests/libknot/realdata/files/parsed_data_queries
diff --git a/src/tests/libknot/realdata/files/raw_data b/src/tests/libknot/realdata/files/raw_data
new file mode 100644
index 0000000..502005e
--- /dev/null
+++ b/src/tests/libknot/realdata/files/raw_data
diff --git a/src/tests/libknot/realdata/files/raw_data_queries b/src/tests/libknot/realdata/files/raw_data_queries
new file mode 100644
index 0000000..9062d5a
--- /dev/null
+++ b/src/tests/libknot/realdata/files/raw_data_queries
diff --git a/src/tests/libknot/realdata/libknot/dname_tests_realdata.c b/src/tests/libknot/realdata/libknot/dname_tests_realdata.c
new file mode 100644
index 0000000..d0216c7
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/dname_tests_realdata.c
@@ -0,0 +1,411 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <assert.h>
+#include <stdarg.h>
+
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "tests/libknot/realdata/libknot/dname_tests_realdata.h"
+#include "libknot/dname.h"
+#include "libknot/common.h"
+
+#include "common/print.h"
+#include "common/lists.h"
+
+static int knot_dname_tests_count(int argc, char *argv[]);
+static int knot_dname_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api dname_tests_api = {
+	"DNS library - dname",        //! Unit name
+	&knot_dname_tests_count,  //! Count scheduled tests
+	&knot_dname_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+int check_domain_name(const knot_dname_t *dname,
+                      const test_dname_t *test_dname)
+{
+	int errors = 0;
+
+	if (dname == NULL) {
+		diag("Domain name not created!");
+		return 1;
+	}
+
+//	diag("test_dname: %p, dname: %p", test_dname, dname);
+	// check size
+	if (knot_dname_size(dname) != test_dname->size) {
+		diag("Bad size of the created domain name: %u (should be %u).",
+		     knot_dname_size(dname), test_dname->size);
+		++errors;
+	} else {
+		// check wire format
+		uint size = knot_dname_size(dname);
+		if (strncmp((char *)knot_dname_name(dname),
+		            (char *)test_dname->wire, size) != 0) {
+			diag("The wire format of the created "
+			     "domain name is wrong:"
+			     " '%.*s' (should be '%.*s').",
+			     size, knot_dname_name(dname),
+			     size, test_dname->wire);
+			++errors;
+		}
+	}
+	// check labels
+	if (test_dname->label_count != dname->label_count) {
+		diag("Label count of the created domain name is wrong:"
+		     " %d (should be %d)\n", dname->label_count,
+		     test_dname->label_count);
+		++errors;
+	}
+	if (strncmp((char *)dname->labels, (char *)test_dname->labels,
+		    test_dname->label_count) != 0) {
+		diag("Label offsets of the created domain name are wrong.\n");
+		hex_print((char *)dname->labels, test_dname->label_count);
+		hex_print((char *)test_dname->labels, test_dname->label_count);
+		++errors;
+	}
+
+	return errors;
+}
+
+static int test_dname_create_from_str(const list *dname_list)
+{
+	int errors = 0;
+	knot_dname_t *dname = NULL;
+
+	/* Test with real data. */
+	node *n = NULL;
+	WALK_LIST(n, *dname_list) {
+		//note("testing domain: %s", test_domains_ok[i].str);
+		test_dname_t *test_dname = (test_dname_t *)n;
+		dname = knot_dname_new_from_str(test_dname->str,
+			  strlen(test_dname->str), NULL);
+		errors += check_domain_name(dname, test_dname);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_create_from_wire(const list *dname_list)
+{
+	int errors = 0;
+	knot_dname_t *dname = NULL;
+
+	node *n = NULL;
+	WALK_LIST(n, *dname_list) {
+		test_dname_t *test_dname = (test_dname_t *)n;
+		dname = knot_dname_new_from_wire(test_dname->wire,
+		                                   test_dname->size, NULL);
+		errors += check_domain_name(dname, test_dname);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_to_str(const list *dname_list)
+{
+	int errors = 0;
+
+	/*
+	 * Converts dname wireformat to string represenation, which is compared
+	 * with entries in test_domains structure.
+	 */
+
+	knot_dname_t *dname = NULL;
+
+	/* Test with real data. */
+	node *n = NULL;
+	WALK_LIST(n, *dname_list) {
+		//note("testing domain: %s", test_domains_ok[i].str);
+		test_dname_t *test_dname = (test_dname_t *)n;
+		dname = knot_dname_new_from_wire(
+		                        test_dname->wire,
+		                        test_dname->size,
+		                        NULL);
+		if (dname == NULL) {
+			ERR_ALLOC_FAILED;
+			return 0;
+		}
+
+		char *name_str = knot_dname_to_str(dname);
+		if (strcmp(name_str, test_dname->str) != 0) {
+			diag("Presentation format of domain name wrong:"
+			     " %s (should be %s)",
+			     name_str, test_dname->str);
+			++errors;
+		}
+		free(name_str);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+static int test_dname_is_fqdn(const list *dname_list)
+{
+	int errors = 0;
+
+	knot_dname_t *dname;
+
+	/* All dnames from real data are fqdn */
+
+	node *n = NULL;
+	WALK_LIST(n, *dname_list) {
+		test_dname_t *test_dname = (test_dname_t *)n;
+		dname = knot_dname_new_from_wire(test_dname->wire,
+		                                   test_dname->size, NULL);
+		errors += !knot_dname_is_fqdn(dname);
+		knot_dname_free(&dname);
+	}
+
+	return (errors == 0);
+}
+
+//static int check_wires(const uint8_t *wire1, uint size1,
+//			 uint8_t *wire2, uint size2)
+//{
+//	if (size1 != size2) {
+//		return 0;
+//	}
+
+//	int i;
+
+//	for (i = 0; (i < size1); i++) {
+//		if (wire1[i] != wire2[i]) {
+//			return 0;
+//		}
+//	}
+
+//	return 1;
+//}
+
+///* \note not to be run separately */
+//static int test_dname_name(knot_dname_t **dnames_fqdn,
+//			   knot_dname_t **dnames_non_fqdn)
+//{
+//	assert(dnames_fqdn);
+//	assert(dnames_non_fqdn);
+
+//	int errors = 0;
+
+//	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+//		const uint8_t *tmp_name;
+//		tmp_name = knot_dname_name(dnames_fqdn[i]);
+//		if (!check_wires(tmp_name, dnames_fqdn[i]->size,
+//				(uint8_t *)test_domains_ok[i].wire,
+//				test_domains_ok[i].size)) {
+//			diag("Got bad name value from structure: "
+//			     "%s, should be: %s",
+//			     tmp_name, test_domains_ok[i].wire);
+//			errors++;
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+//		const uint8_t *tmp_name;
+//		tmp_name = knot_dname_name(dnames_non_fqdn[i]);
+//		if (!check_wires(tmp_name, dnames_non_fqdn[i]->size,
+//				(uint8_t *)test_domains_non_fqdn[i].wire,
+//				test_domains_non_fqdn[i].size)) {
+//			diag("Got bad name value from structure: "
+//			     "%s, should be: %s",
+//			     tmp_name, test_domains_non_fqdn[i].wire);
+//			errors++;
+//		}
+//	}
+
+//	return errors;
+//}
+
+///* \note not to be run separately */
+//static int test_dname_size(knot_dname_t **dnames_fqdn,
+//			   knot_dname_t **dnames_non_fqdn)
+//{
+//	assert(dnames_fqdn);
+//	assert(dnames_non_fqdn);
+
+//	int errors = 0;
+
+//	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+//		uint8_t tmp_size;
+//		if ((tmp_size = knot_dname_size(dnames_fqdn[i])) !=
+//		    test_domains_ok[i].size) {
+//			diag("Got bad size value from structure: "
+//			     "%u, should be: %u",
+//			     tmp_size, test_domains_ok[i].size);
+//			errors++;
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+//		uint8_t tmp_size;
+//		if ((tmp_size = knot_dname_size(dnames_non_fqdn[i])) !=
+//		    test_domains_non_fqdn[i].size) {
+//			diag("Got bad size value from structure: "
+//			     "%u, should be: %u",
+//			     tmp_size, test_domains_non_fqdn[i].size);
+//			errors++;
+//		}
+//	}
+
+//	return errors;
+//}
+
+///* \note not to be run separately */
+//static int test_dname_node(knot_dname_t **dnames_fqdn,
+//			   knot_dname_t **dnames_non_fqdn)
+//{
+//	assert(dnames_fqdn);
+//	assert(dnames_non_fqdn);
+
+//	int errors = 0;
+
+//	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+//		const knot_node_t *tmp_node;
+//		if ((tmp_node = knot_dname_node(dnames_fqdn[i])) !=
+//		    NODE_ADDRESS) {
+//			diag("Got bad node value from structure: "
+//			     "%p, should be: %p",
+//			     tmp_node, NODE_ADDRESS);
+//			errors++;
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+//		const knot_node_t *tmp_node;
+//		if ((tmp_node = knot_dname_node(dnames_non_fqdn[i])) !=
+//		    NODE_ADDRESS) {
+//			diag("Got bad node value from structure: "
+//			     "%s, should be: %s",
+//			     tmp_node, NODE_ADDRESS);
+//			errors++;
+//		}
+//	}
+
+//	return errors;
+//}
+
+//static int test_dname_getters(uint type)
+//{
+//	int errors = 0;
+
+//	knot_dname_t *dnames_fqdn[TEST_DOMAINS_OK];
+//	knot_dname_t *dnames_non_fqdn[TEST_DOMAINS_NON_FQDN];
+
+//	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+//		dnames_fqdn[i] = knot_dname_new_from_wire(
+//				(uint8_t *)test_domains_ok[i].wire,
+//				test_domains_ok[i].size, NODE_ADDRESS);
+//		assert(dnames_fqdn[i] != NULL);
+//	}
+
+//	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+//		dnames_non_fqdn[i] = knot_dname_new_from_wire(
+//				(uint8_t *)test_domains_non_fqdn[i].wire,
+//				test_domains_non_fqdn[i].size, NODE_ADDRESS);
+//		assert(dnames_non_fqdn[i] != NULL);
+//	}
+
+//	switch (type) {
+//		case 0: {
+//			errors += test_dname_name(dnames_fqdn, dnames_non_fqdn);
+//			break;
+//		}
+
+//		case 1: {
+//			errors += test_dname_size(dnames_fqdn, dnames_non_fqdn);
+//			break;
+//		}
+
+//		case 2: {
+//			errors += test_dname_node(dnames_fqdn, dnames_non_fqdn);
+//			break;
+//		}
+//	} /* switch */
+
+//	for (int i = 0; i < TEST_DOMAINS_OK; i++) {
+//		knot_dname_free(&dnames_fqdn[i]);
+//	}
+
+//	for (int i = 0; i < TEST_DOMAINS_NON_FQDN; i++) {
+//		knot_dname_free(&dnames_non_fqdn[i]);
+//	}
+
+//	return (errors == 0);
+//}
+
+static const int KNOT_DNAME_TEST_COUNT = 4;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_dname_tests_count(int argc, char *argv[])
+{
+	return KNOT_DNAME_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_dname_tests_run(int argc, char *argv[])
+{
+	const test_data_t *data = data_for_knot_tests;
+
+	int res = 0,
+	    res_str = 0,
+	    res_wire = 0,
+	    res_str_non_fqdn = 0,
+	    res_final = 1;
+
+	ok((res_str = test_dname_create_from_str(&data->dname_list)),
+	   "dname: create from string");
+	ok((res_wire = test_dname_create_from_wire(&data->dname_list)),
+	   "dname: create from wire");
+
+	res_final *= res_str;
+	res_final *= res_wire;
+	res_final *= res_str_non_fqdn;
+
+//	res = test_dname_getters(0);
+//	ok(res, "dname: name");
+
+//	res = test_dname_getters(1);
+//	ok(res, "dname: size");
+
+//	res = test_dname_getters(2);
+//	ok(res, "dname: node");
+
+//	skip(!res_str || !res_wire || !res_str_non_fqdn, 2);
+
+	ok((res = test_dname_to_str(&data->dname_list)),
+	   "dname: convert to str");
+	res_final *= res;
+
+//	endskip;  /* !res_str || !res_wire */
+
+	ok((res = test_dname_is_fqdn(&data->dname_list)), "dname: fqdn");
+	res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/dname_tests_realdata.h b/src/tests/libknot/realdata/libknot/dname_tests_realdata.h
new file mode 100644
index 0000000..a7d75aa
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/dname_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_DNAME_TESTS_H_
+#define _KNOTD_DNAME_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api dname_tests_api;
+
+#endif /* _KNOTD_DNAME_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/edns_tests_realdata.c b/src/tests/libknot/realdata/libknot/edns_tests_realdata.c
new file mode 100644
index 0000000..257d480
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/edns_tests_realdata.c
@@ -0,0 +1,563 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/realdata/libknot/edns_tests_realdata.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/common.h"
+#include "libknot/edns.h"
+
+static int knot_edns_tests_count(int argc, char *argv[]);
+static int knot_edns_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api edns_tests_api = {
+	"DNS library - EDNS",      //! Unit name
+	&knot_edns_tests_count,  //! Count scheduled tests
+	&knot_edns_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+///* Creates actual knot_opt_rr_t variable from test_edns_t variable */
+//static knot_opt_rr_t *opt_rr_from_test_edns(test_edns_t *test_edns)
+//{
+//	knot_opt_rr_t *ret = knot_edns_new();
+
+//	CHECK_ALLOC_LOG(ret, NULL);
+
+//	ret->flags = test_edns->flags;
+//	ret->ext_rcode = test_edns->ext_rcode;
+//	ret->payload = test_edns->payload;
+//	ret->version = test_edns->version;
+
+//	for (int i = 0; i < test_edns->option_count; i++) {
+//		if (knot_edns_add_option(ret, test_edns->options[i].code,
+//					   test_edns->options[i].length,
+//					   test_edns->options[i].data) != 0) {
+//			knot_edns_free(&ret);
+//			return NULL;
+//		}
+//	}
+
+//	return ret;
+//}
+
+///* simple wire compare - 0 if same, 1 otherwise */
+//static int edns_compare_wires(uint8_t *wire1,
+//			      uint8_t *wire2,
+//			      uint16_t length)
+//{
+//	for (uint i = 0; i < length; i++) {
+//		if (wire1[i] != wire2[i]) {
+//			return 1;
+//		}
+//	}
+
+//	return 0;
+//}
+
+//static int check_edns(const knot_opt_rr_t *edns,
+//		      const test_edns_t *test_edns)
+//{
+//	if (edns->option_count != test_edns->option_count) {
+//		diag("Option count is wrong");
+//		return -1;
+//	}
+
+//	for (int i = 0; i < edns->option_count; i++) {
+//		/* check options */
+//		if (edns->options[i].code != test_edns->options[i].code) {
+//			diag("Code in options is wrong");
+//			return -1;
+//		}
+
+//		if (edns->options[i].length != test_edns->options[i].length) {
+//			diag("Length in options is wrong");
+//			return -1;
+//		}
+
+//		if (edns_compare_wires(edns->options[i].data,
+//				       test_edns->options[i].data,
+//				       edns->options[i].length) != 0)  {
+//			diag("Data in options are wrong");
+//			return -1;
+//		}
+//	}
+
+//	if (edns->version != test_edns->version) {
+//		diag("Version is wrong");
+//		return -1;
+//	}
+
+//	if (edns->flags != test_edns->flags) {
+//		diag("Flags are wrong");
+//		return -1;
+//	}
+
+//	if (edns->size != test_edns->size) {
+//		diag("Size is wrong");
+//		return -1;
+//	}
+
+//	return 0;
+//}
+
+//static int test_edns_get_payload(const knot_opt_rr_t *edns,
+//				 test_edns_t *test_edns)
+//{
+//	if (knot_edns_get_payload(edns) !=
+//	    test_edns->payload) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_get_ext_rcode(const knot_opt_rr_t *edns,
+//				   test_edns_t *test_edns)
+//{
+//	if (knot_edns_get_ext_rcode(edns) !=
+//	    test_edns->ext_rcode) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_get_flags(const knot_opt_rr_t *edns,
+//			       test_edns_t *test_edns)
+//{
+//	if (knot_edns_get_flags(edns) !=
+//	    test_edns->flags) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_get_version(const knot_opt_rr_t *edns,
+//				 test_edns_t *test_edns)
+//{
+//	if (knot_edns_get_version(edns) !=
+//	    test_edns->version) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_do(const knot_opt_rr_t *edns,
+//			test_edns_t *test_edns)
+//{
+//	if (knot_edns_do(edns) !=
+//	    (test_edns->flags & KNOT_EDNS_DO_MASK)) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_size(knot_opt_rr_t *edns, test_edns_t *test_edns)
+//{
+//	diag("%d %d\n", edns->size, test_edns->size);
+//	if (knot_edns_size(edns) !=
+//	    test_edns->size) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_set_payload(knot_opt_rr_t *edns,
+//				 test_edns_t *test_edns)
+//{
+//	knot_edns_set_payload(edns, test_edns->payload);
+
+//	if (edns->payload !=
+//	    test_edns->payload) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_set_ext_rcode(knot_opt_rr_t *edns,
+//				   test_edns_t *test_edns)
+//{
+//	knot_edns_set_ext_rcode(edns, test_edns->ext_rcode);
+//	if (edns->ext_rcode !=
+//	    test_edns->ext_rcode) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_set_version(knot_opt_rr_t *edns,
+//				 test_edns_t *test_edns)
+//{
+//	knot_edns_set_version(edns,
+//				test_edns->version);
+
+//	if (edns->version !=
+//	    test_edns->version) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_set_do(knot_opt_rr_t *edns)
+//{
+//	knot_edns_set_do(edns);
+
+//	if (!knot_edns_do(edns)) {
+//		return 0;
+//	} else {
+//		return 1;
+//	}
+//}
+
+//static int test_edns_getters(uint type)
+//{
+//	int errors = 0;
+//	for (int i = 0; i < TEST_EDNS; i++) {
+//		knot_opt_rr_t *edns =
+//			opt_rr_from_test_edns(&(test_edns_data[i]));
+//		if (edns == NULL) {
+//			ERR_ALLOC_FAILED;
+//			return -1;
+//		}
+
+//		switch(type) {
+//		case 0:
+//			if (test_edns_get_payload(edns,
+//						  &test_edns_data[i]) != 1) {
+//				diag("Got wrong payload!");
+//				errors++;
+//			}
+//			break;
+//		case 1:
+//			if (test_edns_get_ext_rcode(edns,
+//						    &test_edns_data[i]) != 1) {
+//				diag("Got wrong extended RCODE!");
+//				errors++;
+//			}
+//			break;
+//		case 2:
+//			if (test_edns_get_flags(edns,
+//						&test_edns_data[i]) != 1) {
+//				diag("Got wrong flags!");
+
+//				errors++;
+//			}
+//			break;
+//		case 3:
+//			if (test_edns_get_version(edns,
+//						  &test_edns_data[i]) != 1) {
+//				diag("Got wrong version!");
+//				errors++;
+//			}
+//			break;
+//		case 4:
+//			if (test_edns_do(edns,
+//					 &test_edns_data[i]) != 1) {
+//				diag("Got wrong DO bit!");
+//				errors++;
+//			}
+//			break;
+//		case 5:
+//			if (test_edns_size(edns,
+//					   &test_edns_data[i]) != 1) {
+//				diag("Got wrong size!");
+//				errors++;
+//			}
+//			break;
+//		default:
+//			diag("Unknown option");
+//			errors++;
+//		} /* switch */
+
+//		knot_edns_free(&edns);
+//	}
+
+//	return (errors == 0);
+//}
+
+//static int test_edns_setters(uint type)
+//{
+//	int errors = 0;
+//	for (int i = 0; i < TEST_EDNS; i++) {
+//		knot_opt_rr_t *edns =
+//			opt_rr_from_test_edns(&(test_edns_data[i]));
+//		if (edns == NULL) {
+//			ERR_ALLOC_FAILED;
+//			return -1;
+//		}
+
+//		switch(type) {
+//		case 0:
+//			if (test_edns_set_payload(edns,
+//						  &test_edns_data[i]) != 1) {
+//				diag("Set wrong payload!");
+//				errors++;
+//			}
+//			break;
+//		case 1:
+//			if (test_edns_set_ext_rcode(edns,
+//						    &test_edns_data[i]) != 1) {
+//				diag("Set wrong ext_rcode");
+//				errors++;
+//			}
+//			break;
+//		case 2:
+//			if (test_edns_set_version(edns,
+//						  &test_edns_data[i]) != 1) {
+//				diag("Set wrong version!");
+//				errors++;
+//			}
+//			break;
+//		case 3:
+//			if (test_edns_set_do(edns) != 1) {
+//				diag("Set wrong DO bit!");
+//				errors++;
+//			}
+//			break;
+//		default:
+//			diag("Unknown option");
+//			errors++;
+//		} /* switch */
+
+//		knot_edns_free(&edns);
+//	}
+
+//	return (errors == 0);
+//}
+
+//static int test_edns_wire()
+//{
+//	/*
+//	 * Tests to_wire and from_wire in one test.
+//	 */
+//	for (int i = 0; i < TEST_EDNS; i++) {
+//		/* Creates instance from test_edns_t. */
+//		knot_opt_rr_t *edns =
+//			opt_rr_from_test_edns(&(test_edns_data[i]));
+//		if (edns == NULL) {
+//			ERR_ALLOC_FAILED;
+//			return -1;
+//		}
+
+//		uint8_t *wire = NULL;
+//		wire = malloc(sizeof(uint8_t) * edns->size);
+//		CHECK_ALLOC_LOG(wire, 0);
+
+//		/* Converts EDNS to wire. */
+//		short wire_size = knot_edns_to_wire(edns, wire, 100);
+
+//		if (wire_size == -1) {
+//			diag("Could not create EDNS wire");
+//			return 0;
+//		}
+
+//		knot_opt_rr_t *edns_from_wire = knot_edns_new();
+//		if (edns == NULL) {
+//			return 0;
+//		}
+
+//		/* TODO use some constant */
+//		/* Creates new EDNS from wire */
+//		if (knot_edns_new_from_wire(edns_from_wire,
+//					      wire,
+//					      100) <= 0) {
+//			diag("Could not create from wire");
+//			return 0;
+//		}
+
+//		/* Checks whether EDNS created from wire is the same */
+//		if (check_edns(edns_from_wire,
+//			      &(test_edns_data[i])) != 0) {
+//			diag("EDNS created from wire is different from the "
+//			     "original one");
+//		}
+
+//		free(wire);
+//		knot_edns_free(&edns_from_wire);
+//		knot_edns_free(&edns);
+//	}
+//	return 1;
+//}
+
+//static int test_edns_add_option()
+//{
+//	/*
+//	 * Create empty EDNS and add options one by one, testing their presence.
+//	 */
+//	for (int i = 0; i < TEST_EDNS; i++) {
+//		knot_opt_rr_t *edns = knot_edns_new();
+//		assert(edns->option_count == 0);
+
+//		if (edns == NULL) {
+//			ERR_ALLOC_FAILED;
+//			return 0;
+//		}
+
+//		for (int j = 0; j < test_edns_data[i].option_count; j++) {
+//			if (knot_edns_add_option(edns,
+//					   test_edns_data[i].options[j].code,
+//					   test_edns_data[i].options[j].length,
+//					   test_edns_data[i].options[j].
+//					   data) != 0) {
+//				diag("Could not add option");
+//				return 0;
+//			}
+
+//			if (edns->options[j].code !=
+//			    test_edns_data[i].options[j].code) {
+//				diag("Option code wrongly added!");
+//				return 0;
+//			}
+
+//			if (edns->options[j].length !=
+//			    test_edns_data[i].options[j].length) {
+//				diag("Option length wrongly added!");
+//				return 0;
+//			}
+
+//			if (edns_compare_wires(edns->options[j].data,
+//					       test_edns_data[i].
+//					       options[j].data,
+//					       edns->options[j].length) != 0) {
+//				diag("Option wire wrongly added!");
+//				return 0;
+//			}
+//		}
+//		knot_edns_free(&edns);
+//	}
+//	return 1;
+//}
+
+//static int test_edns_has_option()
+//{
+//	/*
+//	 * Create empty EDNS and add options one by one, testing their presence
+//	 */
+//	for (int i = 0; i < TEST_EDNS; i++) {
+//		knot_opt_rr_t *edns = knot_edns_new();
+//		assert(edns->option_count == 0);
+
+//		if (edns == NULL) {
+//			ERR_ALLOC_FAILED;
+//			return 0;
+//		}
+
+//		for (int j = 0; j < test_edns_data[i].option_count; j++) {
+//			if (knot_edns_add_option(edns,
+//					   test_edns_data[i].options[j].code,
+//					   test_edns_data[i].options[j].length,
+//					   test_edns_data[i].options[j].
+//					   data) != 0) {
+//				diag("Could not add option");
+//				return 0;
+//			}
+
+//			if (knot_edns_has_option(edns,
+//				   test_edns_data[i].options[j].code) != 1) {
+//				diag("Option not found!");
+//				return 0;
+//			}
+//		}
+//		knot_edns_free(&edns);
+//	}
+//	return 1;
+//}
+
+static const int KNOT_EDNS_TESTS_COUNT = 0;
+
+///*! This helper routine should report number of
+// *  scheduled tests for given parameters.
+// */
+static int knot_edns_tests_count(int argc, char *argv[])
+{
+	return KNOT_EDNS_TESTS_COUNT;
+}
+
+///*! Run all scheduled tests for given parameters.
+// */
+static int knot_edns_tests_run(int argc, char *argv[])
+{
+//	int res = 0;
+	int res_final = 1;
+
+//	res = test_edns_getters(0);
+//	ok(res, "EDNS: get payload");
+//	res_final *= res;
+
+//	res = test_edns_getters(1);
+//	ok(res, "EDNS: get extenden RCODE");
+//	res_final *= res;
+
+//	res = test_edns_getters(2);
+//	ok(res, "EDNS: get flags");
+//	res_final *= res;
+
+//	res = test_edns_getters(3);
+//	ok(res, "EDNS: get version");
+//	res_final *= res;
+
+//	res = test_edns_getters(4);
+//	ok(res, "EDNS: do");
+//	res_final *= res;
+
+//	res = test_edns_getters(5);
+//	ok(res, "EDNS: size");
+//	res_final *= res;
+
+//	res = test_edns_setters(0);
+//	ok(res, "EDNS: set payload");
+//	res_final *= res;
+
+//	res = test_edns_setters(1);
+//	ok(res, "EDNS: set extended RCODE");
+//	res_final *= res;
+
+//	res = test_edns_setters(2);
+//	ok(res, "EDNS: set version");
+//	res_final *= res;
+
+//	res = test_edns_setters(3);
+//	ok(res, "EDNS: set DO");
+//	res_final *= res;
+
+//	res = test_edns_add_option();
+//	ok(res, "EDNS: add option");
+//	res_final *= res;
+
+//	res = test_edns_has_option();
+//	ok(res, "EDNS: has option");
+//	res_final *= res;
+
+//	res = test_edns_wire();
+//	ok(res, "EDNS: to_wire and from_wire");
+//	res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/edns_tests_realdata.h b/src/tests/libknot/realdata/libknot/edns_tests_realdata.h
new file mode 100644
index 0000000..cfa64b0
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/edns_tests_realdata.h
@@ -0,0 +1,35 @@
+/*!
+ * \file edns_tests.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * Contains unit tests for ENDS API
+ *
+ * Contains tests for:
+ * - ENDS API
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD__EDNS_TESTS_H_
+#define _KNOTD__EDNS_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api edns_tests_api;
+
+#endif /* _KNOTD__EDNS_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/node_tests_realdata.c b/src/tests/libknot/realdata/libknot/node_tests_realdata.c
new file mode 100644
index 0000000..3218c8e
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/node_tests_realdata.c
@@ -0,0 +1,385 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/realdata/libknot/node_tests_realdata.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/dname.h"
+#include "libknot/zone/node.h"
+#include "libknot/util/descriptor.h"
+
+static int knot_node_tests_count(int argc, char *argv[]);
+static int knot_node_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api node_tests_api = {
+	"DNS library - node",       //! Unit name
+	&knot_node_tests_count,  //! Count scheduled tests
+	&knot_node_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+/* TODO It would be wise not to name variables totally same as structures ... */
+knot_dname_t *dname_from_test_dname(const test_dname_t *test_dname)
+{
+	assert(test_dname != NULL);
+	knot_dname_t *ret = knot_dname_new_from_wire(test_dname->wire,
+	                                                 test_dname->size,
+	                                                 NULL);
+	CHECK_ALLOC(ret, NULL);
+
+	return ret;
+}
+
+static knot_rrset_t *rrset_from_test_rrset(const test_rrset_t *test_rrset)
+{
+	assert(test_rrset != NULL);
+	knot_dname_t *owner = dname_from_test_dname(test_rrset->owner);
+	CHECK_ALLOC(owner, NULL);
+
+	knot_rrset_t *ret = knot_rrset_new(owner, test_rrset->type,
+	                                       test_rrset->rclass,
+	                                       test_rrset->ttl);
+	if (ret == NULL) {
+		ERR_ALLOC_FAILED;
+		knot_dname_free(&owner);
+		return NULL;
+	}
+
+	return ret;
+}
+
+static int test_node_create(const list *node_list)
+{
+	/* Tests creation of node by comparing with test_node struct */
+	knot_node_t *tmp;
+	int errors = 0;
+
+	node *n = NULL;
+	WALK_LIST(n, *node_list) {
+		const test_node_t *tmp_node = (test_node_t *)n;
+		assert(tmp_node);
+
+		knot_dname_t *owner =
+			dname_from_test_dname(tmp_node->owner);
+		if (owner == NULL) {
+			return 0;
+		}
+		tmp = knot_node_new(owner,
+				      (knot_node_t *)tmp_node->parent, 0);
+		if (tmp == NULL ||
+		    (strncmp((char *)tmp->owner->name,
+		             (char *)tmp_node->owner->wire,
+		             tmp->owner->size) != 0) ||
+		    tmp->parent != (knot_node_t *)tmp_node->parent ||
+		    tmp->rrset_tree == NULL) {
+			errors++;
+			diag("Failed to create node structure");
+		}
+		knot_node_free(&tmp, 0, 0);
+	}
+
+	return (errors == 0);
+}
+
+static int test_node_add_rrset(list *rrset_list)
+{
+	knot_node_t *tmp;
+	knot_rrset_t *rrset;
+	int errors = 0;
+
+	node *n = NULL;
+	WALK_LIST(n, *rrset_list) {
+		test_rrset_t *test_rrset = (test_rrset_t *)n;
+		rrset = rrset_from_test_rrset(test_rrset);
+		if (rrset == NULL) {
+			diag("Could not create rrset from test data");
+			return 0;
+		}
+
+		/* create node from test_node structure. Always the first one.*/
+		knot_dname_t *owner =
+			dname_from_test_dname(test_rrset->owner);
+		if (owner == NULL) {
+			diag("Could not create owner from test data");
+			return 0;
+		}
+
+		tmp = knot_node_new(owner, NULL, 0);
+
+		if (knot_node_add_rrset(tmp, rrset, 0) != 0) {
+			errors++;
+			diag("Failed to insert rrset into node");
+		}
+
+		/* check if rrset is really there */
+
+		const knot_rrset_t *rrset_from_node = NULL;
+		if ((rrset_from_node =
+			     knot_node_rrset(tmp, rrset->type)) == NULL) {
+			errors++;
+			diag("Inserted rrset could not be found");
+			continue;
+		}
+
+		/* compare rrset from node with original rrset */
+
+		const knot_rrtype_descriptor_t *desc =
+			knot_rrtype_descriptor_by_type(rrset->type);
+
+		int cmp = 0;
+
+		if ((rrset_from_node->rdata == NULL) &&
+		    (rrset->rdata == NULL)) {
+			cmp = 0;
+		} else if ((rrset_from_node->rdata != NULL) &&
+			   (rrset->rdata != NULL)) {
+			cmp = knot_rdata_compare(rrset_from_node->rdata,
+						   rrset->rdata,
+						   desc->wireformat);
+		} else { /* one is not NULL and other is -> error */
+			cmp = 1;
+		}
+
+		if (!((rrset_from_node->type == rrset->type) &&
+		    (rrset_from_node->rclass == rrset->rclass) &&
+		    (rrset_from_node->ttl == rrset->ttl) &&
+		    (rrset_from_node->rrsigs == rrset->rrsigs) &&
+		     (cmp == 0))) {
+			errors++;
+			diag("Values in found rrset are wrong");
+		}
+
+		knot_node_free(&tmp, 1, 0);
+	}
+
+	return (errors == 0);
+}
+
+//static int test_node_get_rrset()
+//{
+//	knot_node_t *tmp;
+//	knot_rrset_t *rrset;
+//	int errors = 0;
+
+//	knot_node_t *nodes[TEST_NODES];
+
+//	for (int i = 0; i < TEST_NODES && !errors; i++) {
+//		tmp = knot_node_new(&test_nodes[i].owner,
+//				      test_nodes[i].parent);
+//		nodes[i] = tmp;
+//		for (int j = 0; j < RRSETS; j++) {
+//			knot_node_add_rrset(tmp, &rrsets[j]);
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_NODES && !errors; i++) {
+//		for (int j = 0; j < RRSETS; j++) {
+//			rrset = &rrsets[j];
+//			if (knot_node_rrset(nodes[i], rrset->type)
+//			    != rrset) {
+//				errors++;
+//				diag("Failed to get proper rrset from node");
+//			}
+//		}
+//		knot_node_free(&nodes[i], 0);
+//	}
+
+//	return (errors == 0);
+//}
+
+//static int test_node_get_parent()
+//{
+//	knot_node_t *tmp;
+//	knot_rrset_t *rrset;
+//	int errors = 0;
+
+//	knot_node_t *nodes[TEST_NODES];
+
+//	for (int i = 0; i < TEST_NODES && !errors; i++) {
+//		tmp = knot_node_new(&test_nodes[i].owner,
+//				      test_nodes[i].parent);
+//		nodes[i] = tmp;
+//		rrset = &rrsets[i];
+//		knot_node_add_rrset(tmp, rrset);
+//	}
+
+//	for (int i = 0; i < TEST_NODES && !errors; i++) {
+//		rrset = &rrsets[i];
+//		if (knot_node_parent(nodes[i]) != test_nodes[i].parent) {
+//			errors++;
+//			diag("Failed to get proper parent from node");
+//		}
+//		knot_node_free(&nodes[i], 0);
+//	}
+//	return (errors == 0);
+//}
+
+//static int test_node_sorting()
+//{
+//	knot_node_t *tmp = NULL;
+//	knot_rrset_t *rrset = NULL;
+//	int errors = 0;
+
+//	knot_dname_t *owner = dname_from_test_dname(test_nodes[0].owner);
+
+//	tmp = knot_node_new(owner,
+//	                      (knot_node_t *)test_nodes[0].parent);
+
+//	/* Will add rrsets to node. */
+//		knot_node_add_rrset(tmp, rrset);
+//	}
+
+//	const skip_node_t *node = skip_first(tmp->rrsets);
+
+//	int last = *((uint16_t *)node->key);
+
+//	/* TODO there is now an API function knot_node_rrsets ... */
+
+//	/* Iterates through skip list and checks, whether it is sorted. */
+
+//	while ((node = skip_next(node)) != NULL) {
+//		if (last > *((uint16_t *)node->key)) {
+//			errors++;
+//			diag("RRset sorting error");
+//		}
+//		last = *((uint16_t *)node->key);
+//	}
+
+//	knot_node_free(&tmp, 1);
+//	return (errors == 0);
+//}
+
+//static int test_node_delete()
+//{
+//	int errors = 0;
+
+//	knot_node_t *tmp_node;
+
+//	for (int i = 0; i < TEST_NODES; i++) {
+//		knot_dname_t *owner =
+//			dname_from_test_dname(test_nodes[i].owner);
+//		tmp_node = knot_node_new(owner,
+//					(knot_node_t *)test_nodes[i].parent);
+
+//		knot_node_free(&tmp_node, 1);
+
+//		errors += (tmp_node != NULL);
+//	}
+
+//	return (errors == 0);
+//}
+
+//static int test_node_set_parent()
+//{
+//	knot_node_t *tmp_parent = (knot_node_t *)0xABCDEF;
+//	int errors = 0;
+
+//	knot_node_t *tmp_node;
+
+//	for (int i = 0; i < TEST_NODES; i++) {
+//		tmp_node = knot_node_new(&test_nodes[i].owner,
+//				      test_nodes[i].parent);
+
+//		knot_node_set_parent(tmp_node, tmp_parent);
+
+//		if (tmp_node->parent != tmp_node->parent) {
+//			diag("Parent node is wrongly set.");
+//			errors++;
+//		}
+//		knot_node_free(&tmp_node, 0);
+//	}
+//	return (errors == 0);
+//}
+
+//static int test_node_free_rrsets()
+//{
+//	int errors = 0;
+
+//	knot_node_t *tmp_node;
+
+//	for (int i = 0; i < TEST_NODES; i++) {
+//		knot_dname_t *owner =
+//			dname_from_test_dname(test_nodes[i].owner);
+//		if (owner == NULL) {
+//			return 0;
+//		}
+
+//		tmp_node = knot_node_new(owner,
+//				      (knot_node_t *)test_nodes[i].parent);
+
+//		knot_node_free_rrsets(tmp_node, 0);
+
+//		errors += (tmp_node->rrsets != NULL);
+
+//		knot_node_free(&tmp_node, 1);
+//	}
+//	return (errors == 0);
+//}
+
+static const int KNOT_NODE_TEST_COUNT = 2;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_node_tests_count(int argc, char *argv[])
+{
+	return KNOT_NODE_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_node_tests_run(int argc, char *argv[])
+{
+	test_data_t *data = data_for_knot_tests;
+	int res = 0,
+	    res_final = 1;
+
+	res = test_node_create(&data->node_list);
+	ok(res, "node: create");
+	res_final *= res;
+
+
+	ok((res = test_node_add_rrset(&data->rrset_list)), "node: add");
+	res_final *= res;
+
+//	ok((res = test_node_get_rrset()), "node: get");
+//	res_final *= res;
+
+//	ok((res = test_node_get_parent()), "node: get parent");
+//	res_final *= res;
+
+//	ok((res = test_node_set_parent()), "node: set parent");
+//	res_final *= res;
+
+//	ok((res = test_node_sorting()), "node: sort");
+//	res_final *= res;
+
+//	ok((res = test_node_free_rrsets()), "node: free rrsets");
+//	res_final *= res;
+
+//	endskip;
+
+//	ok((res = test_node_delete()), "node: delete");
+//	//res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/node_tests_realdata.h b/src/tests/libknot/realdata/libknot/node_tests_realdata.h
new file mode 100644
index 0000000..a90179f
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/node_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_NODE_TESTS_H_
+#define _KNOTD_NODE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api node_tests_api;
+
+#endif /* _KNOTD_NODE_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/packet_tests_realdata.c b/src/tests/libknot/realdata/libknot/packet_tests_realdata.c
new file mode 100644
index 0000000..08c0882
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/packet_tests_realdata.c
@@ -0,0 +1,679 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+
+#include <config.h>
+#include "knot/common.h"
+#include "packet_tests_realdata.h"
+#include "libknot/util/error.h"
+#include "libknot/packet/packet.h"
+#include "libknot/packet/response.h"
+/* *test_t structures */
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#ifdef TEST_WITH_LDNS
+#include "ldns/ldns.h"
+#endif
+
+static int packet_tests_count(int argc, char *argv[]);
+static int packet_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api packet_tests_api = {
+	"DNS library - packet",     //! Unit name
+	&packet_tests_count,  //! Count scheduled tests
+	&packet_tests_run     //! Run scheduled tests
+};
+
+#ifdef TEST_WITH_LDNS
+/* Compares one rdata knot with rdata from ldns.
+ * Comparison is done through comparing wireformats.
+ * Returns 0 if rdata are the same, 1 otherwise
+ */
+int compare_rr_rdata(knot_rdata_t *rdata, ldns_rr *rr,
+			    uint16_t type)
+{
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	for (int i = 0; i < rdata->count; i++) {
+		/* check for ldns "descriptors" as well */
+
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME) {
+			if (rdata->items[i].dname->size !=
+			    ldns_rdf_size(ldns_rr_rdf(rr, i))) {
+				diag("%s", rdata->items[i].dname->name);
+				diag("%s", ldns_rdf_data(ldns_rr_rdf(rr, i)));
+				diag("%d", ldns_rdf_size(ldns_rr_rdf(rr, i)));
+				diag("%d", rdata->items[i].dname->size);
+				diag("Dname sizes in rdata differ");
+				return 1;
+			}
+			if (compare_wires_simple(rdata->items[i].dname->name,
+				ldns_rdf_data(ldns_rr_rdf(rr, i)),
+				rdata->items[i].dname->size) != 0) {
+				diag("%s", rdata->items[i].dname->name);
+				diag("%s", ldns_rdf_data(ldns_rr_rdf(rr, i)));
+				diag("Dname wires in rdata differ");
+				return 1;
+			}
+		} else {
+			/* Compare sizes first, then actual data */
+			if (rdata->items[i].raw_data[0] !=
+			    ldns_rdf_size(ldns_rr_rdf(rr, i))) {
+				/* \note ldns stores the size including the
+				 * length, knot does not */
+				diag("Raw data sizes in rdata differ");
+				diag("knot: %d ldns: %d",
+				     rdata->items[i].raw_data[0],
+				     ldns_rdf_size(ldns_rr_rdf(rr, i)));
+//				hex_print((char *)
+//					  (rdata->items[i].raw_data + 1),
+//					  rdata->items[i].raw_data[0]);
+//				hex_print((char *)ldns_rdf_data(ldns_rr_rdf(rr,
+//									    i)),
+//					  ldns_rdf_size(ldns_rr_rdf(rr, i)));
+				if (abs(rdata->items[i].raw_data[0] -
+				    ldns_rdf_size(ldns_rr_rdf(rr, i))) != 1) {
+					return 1;
+				}
+			}
+			if (compare_wires_simple((uint8_t *)
+				(rdata->items[i].raw_data + 1),
+				ldns_rdf_data(ldns_rr_rdf(rr, i)),
+				rdata->items[i].raw_data[0]) != 0) {
+//				hex_print((char *)
+//					  (rdata->items[i].raw_data + 1),
+//					  rdata->items[i].raw_data[0]);
+//				hex_print((char *)
+//					  ldns_rdf_data(ldns_rr_rdf(rr, i)),
+//					  rdata->items[i].raw_data[0]);
+				diag("Raw data wires in rdata differ in item "
+				     "%d", i);
+
+				return 1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+int compare_rrset_w_ldns_rr(const knot_rrset_t *rrset,
+				      ldns_rr_list *rr_set, char check_rdata)
+{
+	/* We should have only one rrset from ldns, although it is
+	 * represented as rr_list ... */
+
+	int errors = 0;
+
+	ldns_rr *rr = ldns_rr_list_rr(rr_set, 0);
+	assert(rr);
+	assert(rrset);
+
+	/* compare headers */
+
+	if (rrset->owner->size != ldns_rdf_size(ldns_rr_owner(rr))) {
+		char *tmp_dname = knot_dname_to_str(rrset->owner);
+		diag("RRSet owner names differ in length");
+		diag("ldns: %d, knot: %d", ldns_rdf_size(ldns_rr_owner(rr)),
+		     rrset->owner->size);
+		diag("%s", tmp_dname);
+		diag("%s", ldns_rdf_data(ldns_rr_owner(rr)));
+		free(tmp_dname);
+		errors++;
+	}
+
+	if (compare_wires_simple(rrset->owner->name,
+				 ldns_rdf_data(ldns_rr_owner(rr)),
+				 rrset->owner->size) != 0) {
+		diag("RRSet owner wireformats differ");
+		diag("%s \\w %s\n", rrset->owner->name,
+		     ldns_rdf_data(ldns_rr_owner(rr)));
+		errors++;
+	}
+
+	if (rrset->type != ldns_rr_get_type(rr)) {
+		diag("RRset types differ");
+		diag("knot type: %d Ldns type: %d", rrset->type,
+		     ldns_rr_get_type(rr));
+		errors++;
+	}
+
+	if (rrset->rclass != ldns_rr_get_class(rr)) {
+		diag("RRset classes differ");
+		errors++;
+	}
+
+	if (rrset->ttl != ldns_rr_ttl(rr)) {
+		diag("RRset TTLs differ");
+		diag("knot: %d ldns: %d", rrset->ttl, ldns_rr_ttl(rr));
+		errors++;
+	}
+
+	/* compare rdatas */
+
+	if (rrset->rdata == NULL) {
+		diag("RRSet has no RDATA!");
+		return errors;
+	}
+	knot_rdata_t *tmp_rdata = rrset->rdata;
+
+	int i = 0;
+
+	while ((rr = ldns_rr_list_pop_rr(rr_set))) {
+		assert(rr);
+
+		if (compare_rr_rdata(tmp_rdata, rr, rrset->type) != 0) {
+			diag("Rdata differ");
+			return 1;
+		}
+
+		tmp_rdata = tmp_rdata->next;
+		i++;
+	}
+
+////	if (check_rdata) {
+////		if (compare_rr_rdata(rrset->rdata, rr, rrset->type) != 0) {
+////			diag("Rdata differ");
+////			errors++;
+////		}
+////	}
+
+	return errors;
+}
+
+int compare_rrsets_w_ldns_rrlist(const knot_rrset_t **rrsets,
+					ldns_rr_list *rrlist, int count)
+{
+	int errors = 0;
+
+	/* There are no rrsets currenty. Everything is just rr */
+
+	ldns_rr_list *rr_set = NULL;
+
+	ldns_rr_list_sort(rrlist);
+
+	if (count < 0) {
+		return 0;
+	}
+
+	for (int i = 0; i < count ; i++) {
+		/* normally ldns_pop_rrset or such should be here */
+
+		rr_set = ldns_rr_list_pop_rrset(rrlist);
+		/* Get one rr from list. */
+		ldns_rr *rr = ldns_rr_list_rr(rr_set, 0);
+		assert(rr);
+
+		if (rr_set == NULL) {
+			diag("Ldns and knot structures have different "
+			     "counts of rrsets.");
+			diag("knot: %d ldns: %d",
+			     count, (count - 1) - i);
+			return -1;
+		}
+
+//		diag("RRset from ldns is %d long", ldns_rr_list_rr_count(rr_set));
+
+//		diag("Got type from ldns: %d (%d)\n", ldns_rr_get_type(rr), i);
+
+		int j = 0;
+		for (j = 0; j < count; j++) {
+//			diag("Got type from knot: %d\n", rrsets[j]->type);
+			if (rrsets[j]->type == ldns_rr_get_type(rr) &&
+			    rrsets[j]->owner->size ==
+			    ldns_rdf_size(ldns_rr_owner(rr)) &&
+			    (compare_wires_simple(ldns_rdf_data(ldns_rr_owner(rr)), rrsets[j]->owner->name,
+			    rrsets[j]->owner->size) == 0)) {
+				errors += compare_rrset_w_ldns_rr(rrsets[j],
+				                                  rr_set, 1);
+				break;
+			}
+		}
+		if (j == count) {
+			diag("There was no RRSet of the same type!");
+//			errors++;
+		}
+	}
+
+	return errors;
+}
+
+int check_packet_w_ldns_packet(knot_packet_t *packet,
+                                      ldns_pkt *ldns_packet,
+                                      int check_header,
+                                      int check_question,
+                                      int check_body,
+                                      int check_edns)
+{
+	int errors = 0;
+	if (check_header) {
+//		if (packet->header.id != ldns_pkt_id(ldns_packet)) {
+//			diag("response ID does not match - %d %d",
+//			     packet->header.id,
+//			     ldns_pkt_id(ldns_packet));
+//			errors++;
+//		}
+
+		/* qdcount is always 1 in knot's case */
+
+		/* TODO check flags1 and flags2 - no API for that,
+		 * write my own */
+
+		if (packet->header.ancount !=
+		                ldns_pkt_ancount(ldns_packet)) {
+			diag("Answer RRSet count wrongly converted");
+			errors++;
+		}
+
+		if (packet->header.nscount !=
+		                ldns_pkt_nscount(ldns_packet)) {
+			diag("Authority RRSet count wrongly converted.\n"
+			     "got %d should be %d",
+			     packet->header.nscount,
+			     ldns_pkt_nscount(ldns_packet));
+			errors++;
+		}
+
+		/* - 1 because ldns does not include OPT_RR to additional "
+		 "section */
+		int minus = (!ldns_pkt_edns_version(ldns_packet)) ? 1 : 0;
+//		int minus = 0;
+
+		if ((packet->header.arcount - minus) !=
+		                ldns_pkt_arcount(ldns_packet)) {
+			diag("Additional RRSet count wrongly converted.\n"
+			     "got %d should be %d",
+			     packet->header.arcount,
+			     ldns_pkt_arcount(ldns_packet));
+			errors++;
+		}
+
+		/*!< \todo Check OPT RR! */
+
+		if (errors) {
+			return errors;
+		}
+	}
+	/* Header checked */
+
+	/* Question section */
+
+	int ret = 0;
+	if (check_question) {
+		knot_rrset_t *question_rrset =
+		                knot_rrset_new(packet->
+		                                 question.qname,
+		                                 packet->
+		                                 question.qtype,
+		                                 packet->
+		                                 question.qclass,
+		                                 3600);
+
+		if ((ret = compare_rrset_w_ldns_rr(question_rrset,
+			ldns_pkt_question(ldns_packet), 0)) != 0) {
+			diag("Question rrsets wrongly converted");
+			errors++;
+		}
+		knot_rrset_free(&question_rrset);
+	}
+
+	if (check_body) {
+
+		/* other RRSets */
+
+		if ((ret =
+		     compare_rrsets_w_ldns_rrlist(packet->answer,
+		                         ldns_pkt_answer(ldns_packet),
+                        knot_packet_answer_rrset_count(packet))) != 0) {
+			diag("Answer rrsets wrongly converted");
+			errors++;
+		}
+
+
+
+		if ((ret = compare_rrsets_w_ldns_rrlist(packet->authority,
+		                             ldns_pkt_authority(ldns_packet),
+			knot_packet_authority_rrset_count(packet))) != 0) {
+			diag("Authority rrsets wrongly converted - %d", ret);
+			errors++;
+		}
+
+		/* We don't want to test OPT RR, which is the last rrset
+		 * in the additional section */
+
+		if ((ret = compare_rrsets_w_ldns_rrlist(packet->additional,
+		                           ldns_pkt_additional(ldns_packet),
+			knot_packet_additional_rrset_count(packet) - 1)) != 0) {
+			diag("Additional rrsets wrongly converted");
+			errors++;
+		}
+
+	}
+
+	if (check_edns) {
+
+		/* OPT RR */
+
+		if (ldns_pkt_edns(ldns_packet)) {
+			/* if (packet->edns_packet == NULL) {
+   diag("ldns has edns section, knot has not");
+   return 1;
+  } */
+
+			knot_opt_rr_t *opt = &(packet->opt_rr);
+
+			if (ldns_pkt_edns_udp_size(ldns_packet) !=
+			                knot_edns_get_payload(opt)) {
+				diag("Payloads in EDNS are different");
+				errors++;
+			}
+
+			if (ldns_pkt_edns_version(ldns_packet) !=
+			                knot_edns_get_version(opt)) {
+				diag("Versions in EDNS are different");
+				errors++;
+			}
+
+			if (ldns_pkt_edns_extended_rcode(ldns_packet) !=
+			                knot_edns_get_ext_rcode(opt)) {
+				diag("Extended rcodes in EDNS are different");
+				errors++;
+			}
+
+			/* TODO parse flags do bit, z value ... */
+		}
+	}
+
+	return errors;
+}
+#endif
+
+extern knot_rrset_t *rrset_from_test_rrset(const test_rrset_t *test_rrset);
+extern knot_dname_t *dname_from_test_dname(const test_dname_t *test_dname);
+
+/* Converts knot_rrset_t to knot_opt_rr */
+static knot_opt_rr_t *opt_rrset_to_opt_rr(knot_rrset_t *rrset)
+{
+	if (rrset == NULL) {
+		return NULL;
+	}
+
+	knot_opt_rr_t *opt_rr = knot_edns_new();
+	assert(opt_rr);
+
+	knot_edns_set_payload(opt_rr, rrset->rclass);
+
+	knot_edns_set_ext_rcode(opt_rr, rrset->ttl);
+
+	/* TODO rdata? mostly empty, I guess, but should be done */
+
+	return opt_rr;
+}
+
+knot_packet_t *packet_from_test_response(test_response_t *test_packet)
+{
+	knot_rrset_t *parsed_opt = NULL;
+
+	for (int j = 0; j < test_packet->arcount; j++) {
+		if (test_packet->additional[j]->type ==
+		    KNOT_RRTYPE_OPT) {
+			parsed_opt =
+				rrset_from_test_rrset(
+				test_packet->additional[j]);
+			assert(parsed_opt);
+			break;
+		}
+	}
+
+	knot_opt_rr_t *opt_rr = NULL;
+	if (parsed_opt != NULL) {
+		opt_rr =
+			opt_rrset_to_opt_rr(parsed_opt);
+		assert(opt_rr);
+	} else {
+		opt_rr = NULL;
+	}
+
+	knot_packet_t *packet =
+		knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+	assert(packet);
+	knot_packet_set_max_size(packet, 1024 * 10);
+
+	if (opt_rr != NULL) {
+		packet->opt_rr = *opt_rr;
+	}
+
+	packet->header.id = test_packet->id;
+	packet->header.qdcount = test_packet->qdcount;
+
+	packet->question.qname = dname_from_test_dname(test_packet->qname);
+	packet->size += test_packet->qname->size;
+	packet->question.qtype = test_packet->qtype;
+	packet->question.qclass = test_packet->qclass;
+
+	packet->size += 4;
+
+	packet->answer =
+		malloc(sizeof(knot_rrset_t *) * test_packet->ancount);
+	assert(packet->answer);
+
+	for (int j = 0; j < test_packet->ancount; j++) {
+		if (&(test_packet->answer[j])) {
+			packet->answer[packet->an_rrsets++] =
+			  rrset_from_test_rrset(test_packet->answer[j]);
+		}
+	}
+
+	packet->authority =
+		malloc(sizeof(knot_rrset_t *) * test_packet->nscount);
+	assert(packet->answer);
+
+	for (int j = 0; j < test_packet->nscount; j++) {
+		if (&(test_packet->authority[j])) {
+			packet->authority[packet->ns_rrsets++] =
+			  rrset_from_test_rrset(test_packet->authority[j]);
+		}
+	}
+
+	packet->authority =
+		malloc(sizeof(knot_rrset_t *) * test_packet->arcount);
+	assert(packet->answer);
+
+	for (int j = 0; j < test_packet->arcount; j++) {
+		if (&(test_packet->additional[j])) {
+			if (test_packet->additional[j]->type ==
+			    KNOT_RRTYPE_OPT) {
+				continue;
+			}
+			packet->additional[packet->ar_rrsets++] =
+			  rrset_from_test_rrset(test_packet->additional[j]);
+		}
+	}
+
+	return packet;
+}
+
+static int test_packet_parse_from_wire(list raw_response_list)
+{
+#ifdef TEST_WITH_LDNS
+	int errors = 0;
+
+	node *n = NULL;
+	WALK_LIST(n ,raw_response_list) {
+		test_raw_packet_t *raw_packet = (test_raw_packet_t *)n;
+		knot_packet_t *packet =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		int ret = 0;
+		if ((ret =
+		     knot_packet_parse_from_wire(packet, raw_packet->data,
+		                                   raw_packet->size, 0)) !=
+		    KNOT_EOK) {
+			diag("Warning: could not parse wire! "
+			     "(might be caused by malformed dump) - "
+			     "knot error: %s", knot_strerror(ret));
+//			hex_print(raw_packet->data,
+//			          raw_packet->size);
+			continue;
+		}
+
+		ldns_pkt *ldns_packet = NULL;
+
+		if (ldns_wire2pkt(&ldns_packet, raw_packet->data,
+				  raw_packet->size) != LDNS_STATUS_OK) {
+			diag("Could not parse wire using ldns");
+			diag("%s",
+			     ldns_get_errorstr_by_id(ldns_wire2pkt(&ldns_packet,
+							raw_packet->data,
+							raw_packet->size)));
+			return 0;
+		}
+
+		if (check_packet_w_ldns_packet(packet, ldns_packet, 1,
+		                               1, 1, 1) != 0) {
+			diag("Wrongly created packet");
+			errors++;
+		}
+
+		ldns_pkt_free(ldns_packet);
+		knot_packet_free(&packet);
+	}
+
+	return (errors == 0);
+#endif
+#ifndef TEST_WITH_LDNS
+	diag("Enable ldns to test this feature");
+	return 0;
+#endif
+}
+
+static int test_packet_to_wire(list raw_response_list)
+{
+#ifdef TEST_WITH_LDNS
+	int errors = 0;
+	/*!< \todo test queries too! */
+//	/* We'll need data from both lists. */
+//	test_packet_t **test_packets = NULL;
+//	uint test_packet_count = 0;
+//	node *n = NULL;
+//	WALK_LIST(n, response_list) {
+//		test_packet_count++;
+//	}
+
+//	test_packets =
+//		malloc(sizeof(test_packet_t *) * test_packet_count);
+//	assert(test_packets);
+//	int i = 0;
+//	WALK_LIST(n, response_list) {
+//		test_packets[i++] = (test_response_t *)n;
+//	}
+
+//	test_raw_packet_t **test_packets = NULL;
+//	uint test_packet_count = 0;
+//	n = NULL;
+//	WALK_LIST(n, raw_response_list) {
+//		test_packet_count++;
+//	}
+
+//	test_packets =
+//		malloc(sizeof(test_raw_packet_t *) * test_packet_count);
+//	assert(test_packets);
+//	i = 0;
+//	WALK_LIST(n, raw_response_list) {
+//		test_packets[i++] = (test_raw_packet_t *)n;
+//	}
+
+//	assert(test_response_count == test_packet_count);
+	node *n = NULL;
+	WALK_LIST(n, raw_response_list) {
+		/* Create packet from raw response. */
+		knot_packet_t *packet =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(packet);
+		test_raw_packet_t *raw_packet = (test_raw_packet_t *)n;
+		if (knot_packet_parse_from_wire(packet, raw_packet->data,
+		                                  raw_packet->size, 0) !=
+		    KNOT_EOK) {
+			diag("Warning: could not parse wire! "
+			     "(might be caused be malformed dump)");
+			continue;
+		}
+		knot_packet_set_max_size(packet, 1024 * 10);
+		/* Use this packet to create wire */
+		uint8_t *wire = NULL;
+		size_t size = 0;
+		if (knot_packet_to_wire(packet, &wire ,&size) != KNOT_EOK) {
+			diag("Could not convert packet to wire");
+		}
+		/* Create ldns packet from created wire */
+		ldns_pkt *ldns_packet = NULL;
+
+		if (ldns_wire2pkt(&ldns_packet, wire,
+		                  size) != LDNS_STATUS_OK) {
+			diag("Could not parse wire using ldns");
+			/*!< \todo get rid of this */
+			diag("%s",
+			     ldns_get_errorstr_by_id(ldns_wire2pkt(&ldns_packet,
+			                             wire,
+			                             size)));
+			return 0;
+		}
+
+		if (check_packet_w_ldns_packet(packet, ldns_packet, 1, 1, 1,
+		                               1) != 0) {
+			diag("Packet wrongly converted to wire!");
+			errors++;
+		}
+		knot_packet_free(&packet);
+		ldns_pkt_free(ldns_packet);
+	}
+
+	return (errors == 0);
+#endif
+#ifndef TEST_WITH_LDNS
+	diag("Enable ldns to test this feature!");
+	return 0;
+#endif
+}
+
+static const uint KNOT_PACKET_TEST_COUNT = 2;
+
+static int packet_tests_count(int argc, char *argv[])
+{
+	return KNOT_PACKET_TEST_COUNT;
+}
+
+static int packet_tests_run(int argc, char *argv[])
+{
+	const test_data_t *data = data_for_knot_tests;
+
+	int res = 0;
+	todo();
+	ok(res = test_packet_parse_from_wire(data->raw_packet_list),
+	   "packet: from wire");
+	diag("Resolve issue with arcount.");
+	endtodo;
+//	skip(!res, 1);
+	ok(test_packet_to_wire(data->raw_packet_list), "packet: to wire");
+//	endskip;
+
+	return 1;
+}
+
diff --git a/src/tests/libknot/realdata/libknot/packet_tests_realdata.h b/src/tests/libknot/realdata/libknot/packet_tests_realdata.h
new file mode 100644
index 0000000..c0e0479
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/packet_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_PACKET_REALDATA_TESTS_H_
+#define _KNOTD_PACKET_REALDATA_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api packet_tests_api;
+
+#endif /* _KNOTD_PACKET_REALDATA_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/rdata_tests_realdata.c b/src/tests/libknot/realdata/libknot/rdata_tests_realdata.c
new file mode 100644
index 0000000..f4ba64c
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/rdata_tests_realdata.c
@@ -0,0 +1,329 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "tests/libknot/realdata/libknot/rdata_tests_realdata.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/common.h"
+#include "libknot/rdata.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/util/utils.h"
+#include "libknot/util/error.h"
+
+static int knot_rdata_tests_count(int argc, char *argv[]);
+static int knot_rdata_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api rdata_tests_api = {
+	"DNS library - rdata",        //! Unit name
+	&knot_rdata_tests_count,  //! Count scheduled tests
+	&knot_rdata_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+extern int check_domain_name(const knot_dname_t *dname,
+                             const test_dname_t *test_dname);
+
+extern int compare_wires_simple(uint8_t *wire1, uint8_t *wire2, uint count);
+
+/*!
+ * \brief Checks if all RDATA items in the given RDATA structure are correct.
+ *
+ * \return Number of errors encountered. Error is either if some RDATA item
+ *         is not set (i.e. NULL) or if it has other than the expected value.
+ */
+static int check_rdata(const knot_rdata_t *rdata,
+                       const test_rdata_t *test_rdata)
+{
+	assert(rdata != NULL);
+	assert(test_rdata != NULL);
+
+	int errors = 0;
+
+	knot_rrtype_descriptor_t *desc =
+	knot_rrtype_descriptor_by_type(test_rdata->type);
+	//note("check_rdata(), RRType: %u", rrtype);
+
+	for (int i = 0; i < desc->length; ++i) {
+
+		switch (desc->wireformat[i]) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			if (check_domain_name(rdata->items[i].dname,
+			               test_rdata->items[i].dname) != 0) {
+				errors++;
+				diag("Rdata contains wrong dname item");
+			}
+			break;
+		default:
+			if (test_rdata->items[i].raw_data[0] !=
+				rdata->items[i].raw_data[0]) {
+				diag("Raw rdata in items have different "
+				     "sizes!");
+				return 0;
+			}
+
+			errors +=
+				compare_wires_simple(
+				       (uint8_t *)test_rdata->items[i].raw_data,
+				       (uint8_t *)rdata->items[i].raw_data,
+				       (uint)rdata->items[i].raw_data[0]);
+		}
+	}
+	return errors;
+}
+
+extern knot_dname_t *dname_from_test_dname(test_dname_t *test_dname);
+
+///*!
+// * \brief Tests knot_rdata_set_item().
+// *
+// * \retval > 0 on success.
+// * \retval 0 otherwise.
+// */
+//static int test_rdata_set_item(list rdata_list)
+//{
+//	node *n = NULL;
+//	WALK_LIST(n, rdata_list) {
+//		knot_rdata_t *rdata = knot_rdata_new();
+//		assert(rdata);
+//		test_rdata_t *test_rdata = (test_rdata_t *)n;
+
+//		knot_rrtype_descriptor_t *desc =
+//			knot_rrtype_descriptor_by_type(test_rdata->type);
+//		for (int i = 0; i < test_rdata->count; i++) {
+//			knot_rdata_item_t item;
+//			if (test_rdata->items[i].type == TEST_ITEM_DNAME) {
+//				item.dname =
+//				dname_from_test_dname(
+//					test_rdata->items[i].dname);
+//			} else {
+//				item.raw_data = test_rdata->items[i].raw_data;
+//			}
+//			if (knot_rdata_set_item(rdata, i, item) != 0) {
+//				diag("Could not set item, rdata count: %d",
+//				     rdata->count);
+//				return 0;
+//			}
+//		}
+
+//		/* Check that all items are OK */
+//		if (check_rdata(rdata, test_rdata) != 0) {
+//			return 0;
+//		}
+//	}
+//	return 1;
+//}
+
+static knot_rdata_item_t *items_from_test_items(test_item_t *test_items,
+                                                  size_t count)
+{
+	knot_rdata_item_t *items =
+		malloc(sizeof(knot_rdata_item_t) * count);
+	assert(items);
+	for (int i = 0; i < count; i++) {
+		if (test_items[i].type == TEST_ITEM_DNAME) {
+			items[i].dname =
+				dname_from_test_dname(test_items[i].dname);
+		} else {
+			items[i].raw_data = test_items[i].raw_data;
+		}
+	}
+
+	return items;
+}
+
+static int test_rdata_set_items(list rdata_list)
+{
+	int errors = 0;
+
+	// check error return values
+	knot_rdata_t *rdata = knot_rdata_new();
+	assert(rdata);
+
+	node *n = NULL;
+	WALK_LIST(n, rdata_list) {
+		test_rdata_t *test_rdata = (test_rdata_t *)n;
+		knot_rdata_t *rdata = knot_rdata_new();
+
+		/* create dnslib items from tests items. */
+		knot_rdata_item_t *items =
+			items_from_test_items(test_rdata->items,
+			test_rdata->count);
+
+		assert(items);
+		assert(test_rdata->count > 0);
+		assert(rdata->items == NULL);
+
+		if (knot_rdata_set_items(rdata, items,
+		                           test_rdata->count) != 0) {
+				diag("Could not set items!");
+				errors++;
+		}
+
+		if (check_rdata(rdata, test_rdata) != 0) {
+			diag("Wrong rdata after knot_rdata_set_items!");
+			errors++;
+		}
+
+		knot_rdata_free(&rdata);
+	}
+
+	return (errors == 0);
+}
+
+/*----------------------------------------------------------------------------*/
+/*!
+ * \brief Tests knot_rdata_get_item().
+ *
+ * \retval > 0 on success.
+ * \retval 0 otherwise.
+ */
+static int test_rdata_get_item(list rdata_list)
+{
+	node *n = NULL;
+	WALK_LIST(n, rdata_list) {
+		test_rdata_t *test_rdata = (test_rdata_t *)n;
+		knot_rdata_t *rdata = knot_rdata_new();
+		assert(rdata);
+		knot_rdata_item_t *items =
+			items_from_test_items(test_rdata->items,
+		                              test_rdata->count);
+		assert(knot_rdata_set_items(rdata, items,
+		                              test_rdata->count) == 0);
+		knot_rdata_item_t *new_items =
+			malloc(sizeof(knot_rdata_item_t) * test_rdata->count);
+		for (int i = 0; i < test_rdata->count; i++) {
+			knot_rdata_item_t *item =
+				knot_rdata_get_item(rdata, i);
+			if (item == NULL) {
+				diag("Could not get item");
+				return 0;
+			}
+			new_items[i] = *item;
+		}
+
+		knot_rdata_free(&rdata);
+		free(items);
+
+		knot_rdata_t *new_rdata = knot_rdata_new();
+		assert(new_rdata);
+		assert(knot_rdata_set_items(new_rdata,
+		                              new_items,
+		                              test_rdata->count) == 0);
+
+		if (check_rdata(new_rdata, test_rdata) != 0) {
+			diag("Wrong rdata created using rdata_get_item");
+			return 0;
+		}
+
+		knot_rdata_free(&new_rdata);
+		free(new_items);
+	}
+
+	return 1;
+}
+
+//static int test_rdata_wire_size()
+//{
+//	knot_rdata_t *rdata;
+//	int errors = 0;
+
+//	// generate some random data
+//	uint8_t data[KNOT_MAX_RDATA_WIRE_SIZE];
+//	generate_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE);
+
+//	for (int i = 0; i <= KNOT_RRTYPE_LAST; ++i) {
+//		rdata = knot_rdata_new();
+
+//		int size =
+//		fill_rdata(data, KNOT_MAX_RDATA_WIRE_SIZE, i, rdata);
+
+//		if (size < 0) {
+//			++errors;
+//		} else {
+//			int counted_size = knot_rdata_wire_size(rdata,
+//			    knot_rrtype_descriptor_by_type(i)->wireformat);
+//			if (size != counted_size) {
+//				diag("Wrong wire size computed (type %d):"
+//				     " %d (should be %d)",
+//				     i, counted_size, size);
+//				++errors;
+//			}
+//		}
+
+//		knot_rrtype_descriptor_t *desc =
+//		    knot_rrtype_descriptor_by_type(i);
+
+//		for (int x = 0; x < desc->length; x++) {
+//			if (desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_COMPRESSED_DNAME ||
+//			    desc->wireformat[x] ==
+//			    KNOT_RDATA_WF_LITERAL_DNAME) {
+//				knot_dname_free(&(rdata->items[x].dname));
+//			}
+//		}
+//		knot_rdata_free(&rdata);
+//	}
+
+//	return (errors == 0);
+//}
+
+/*----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------*/
+
+static const int KNOT_RDATA_TEST_COUNT = 2;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_rdata_tests_count(int argc, char *argv[])
+{
+	return KNOT_RDATA_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_rdata_tests_run(int argc, char *argv[])
+{
+	test_data_t *data = data_for_knot_tests;
+	int res = 0,
+	    res_final = 1;
+
+	ok(res = test_rdata_set_items(data->rdata_list),
+	   "rdata: set items all at once");
+	res_final *= res;
+
+	ok(res = test_rdata_get_item(data->rdata_list),
+	   "rdata: get item");
+	res_final *= res;
+
+//	ok(res = test_rdata_set_item(data->rdata_list),
+//	   "rdata: set items one-by-one");
+//	res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/rdata_tests_realdata.h b/src/tests/libknot/realdata/libknot/rdata_tests_realdata.h
new file mode 100644
index 0000000..570b2b1
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/rdata_tests_realdata.h
@@ -0,0 +1,53 @@
+/*!
+ * \file rdata_tests.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ *
+ * Contains unit tests for RDATA (knot_rdata_t) and RDATA item
+ * (knot_rdata_item_t) structures.
+ *
+ * Contains tests for:
+ * - creating empty RDATA structure with or without reserved space.
+ * - setting RDATA items one-by-one
+ * - setting RDATA items all at once
+ *
+ * As for now, the tests use several (TEST_RDATAS) RDATA structures, each
+ * with different number of RDATA items (given by test_rdatas). These are all
+ * initialized to pointers derived from RDATA_ITEM_PTR (first is RDATA_ITEM_PTR,
+ * second RDATA_ITEM_PTR + 1, etc.). The functions only test if the pointer
+ * is set properly.
+ *
+ * \todo It may be better to test also some RDATAs with predefined contents,
+ *       such as some numbers, some domain name, etc. For this purpose, we'd
+ *       need RDATA descriptors (telling the types of each RDATA item within an
+ *       RDATA).
+ *
+ * \todo It will be fine to test all possible output values of all functions,
+ *       e.g. test whether knot_rdata_get_item() returns NULL when passed an
+ *       illegal position, etc.
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_RDATA_TESTS_H_
+#define _KNOTD_RDATA_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api rdata_tests_api;
+
+#endif /* _KNOTD_RDATA_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/response_tests_realdata.c b/src/tests/libknot/realdata/libknot/response_tests_realdata.c
new file mode 100644
index 0000000..5bbda36
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/response_tests_realdata.c
@@ -0,0 +1,173 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/* blame: jan.kadlec@nic.cz */
+
+#include <assert.h>
+
+#include "packet_tests_realdata.h"
+#include "knot/common.h"
+#include "libknot/util/error.h"
+#include "libknot/packet/packet.h"
+#include "libknot/packet/response.h"
+/* *test_t structures */
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#ifdef TEST_WITH_LDNS
+#include "ldns/packet.h"
+#endif
+
+static int response_tests_count(int argc, char *argv[]);
+static int response_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api response_tests_api = {
+	"DNS library - response",     //! Unit name
+	&response_tests_count,  //! Count scheduled tests
+	&response_tests_run     //! Run scheduled tests
+};
+
+#ifdef TEST_WITH_LDNS
+extern int compare_wires_simple(uint8_t *wire1, uint8_t *wire2, uint count);
+extern int compare_rr_rdata(knot_rdata_t *rdata, ldns_rr *rr, uint16_t type);
+extern int compare_rrset_w_ldns_rr(const knot_rrset_t *rrset,
+                                   ldns_rr *rr, char check_rdata);
+extern int compare_rrsets_w_ldns_rrlist(const knot_rrset_t **rrsets,
+					ldns_rr_list *rrlist, int count);
+
+extern int check_packet_w_ldns_packet(knot_packet_t *packet,
+                                      ldns_pkt *ldns_packet,
+                                      int check_header,
+                                      int check_question,
+                                      int check_body,
+                                      int check_edns);
+#endif
+
+extern knot_packet_t *packet_from_test_response(test_response_t *response);
+
+static int test_response_init_from_query(list query_list)
+{
+	int errors = 0;
+	node *n = NULL;
+	WALK_LIST(n, query_list) {
+		knot_packet_t *response =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(response);
+		knot_packet_t *query =
+			packet_from_test_response((test_response_t *)n);
+		assert(query);
+		knot_packet_set_max_size(response, 1024 * 10);
+		if (knot_response_init_from_query(response,
+		                                     query) != KNOT_EOK) {
+			diag("Could not init response from query!");
+			errors++;
+		}
+		knot_packet_free(&response);
+		knot_packet_free(&query);
+	}
+	return (errors == 0);
+}
+
+//static int test_response_add_opt(list opt_list)
+//{
+//	int errors = 0;
+//	node *n = NULL;
+//	WALK_LIST(n, query_list) {
+//		knot_packet_t *response =
+//			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+//		assert(response);
+//		knot_opt_rr_t *opt =
+//			opt_from_test_opt((test_opt_t *)n);
+//		assert(query);
+//		if (knot_response_add_opt(response,
+//		                             opt, 1)!= KNOT_EOK) {
+//			diag("Could not add OPT RR to response!");
+//			errors++;
+//		}
+//		knot_packet_free(&response);
+//		knot_opt_rr_free(&opt);
+//	}
+//	return (errors == 0);
+//}
+
+extern knot_rrset_t *rrset_from_test_rrset(test_rrset_t *test_rrset);
+
+static int test_response_add_generic(int (*func)(knot_packet_t *,
+                                                 const knot_rrset_t *,
+                                                 int, int, int),
+                                     list rrset_list)
+{
+	/*!< \todo Now adding only one RRSet at the time, try more, use nodes */
+	int errors = 0;
+	node *n = NULL;
+	WALK_LIST(n, rrset_list) {
+		knot_packet_t *response =
+			knot_packet_new(KNOT_PACKET_PREALLOC_RESPONSE);
+		assert(response);
+		knot_packet_set_max_size(response,
+		                           KNOT_PACKET_PREALLOC_RESPONSE * 100);
+		assert(knot_response_init(response) == KNOT_EOK);
+
+		knot_rrset_t *rrset =
+			rrset_from_test_rrset((test_rrset_t *)n);
+		assert(rrset);
+
+		int ret = 0;
+		if ((ret = func(response, rrset, 0, 1, 0)) != KNOT_EOK) {
+			diag("Could not add RRSet to response! Returned: %d",
+			     ret);
+			diag("(owner: %s type %s)",
+			     ((test_rrset_t *)n)->owner->str,
+			     knot_rrtype_to_string((
+			     (test_rrset_t *)n)->type));
+			errors++;
+		}
+		knot_packet_free(&response);
+		knot_rrset_deep_free(&rrset, 1, 1, 1);
+	}
+
+	return (errors == 0);
+}
+
+static void test_response_add_rrset(list rrset_list)
+{
+	ok(test_response_add_generic(knot_response_add_rrset_answer,
+	                             rrset_list),
+	   "response: add answer rrset");
+	ok(test_response_add_generic(knot_response_add_rrset_authority,
+	                             rrset_list),
+	   "response: add authority rrset");
+	ok(test_response_add_generic(knot_response_add_rrset_additional,
+	                             rrset_list),
+	   "response: add additional rrset");
+}
+
+static const uint KNOT_response_TEST_COUNT = 4;
+
+static int response_tests_count(int argc, char *argv[])
+{
+	return KNOT_response_TEST_COUNT;
+}
+
+static int response_tests_run(int argc, char *argv[])
+{
+	const test_data_t *data = data_for_knot_tests;
+
+//	int res = 0;
+	ok(test_response_init_from_query(data->query_list),
+	   "response: init from query");
+	test_response_add_rrset(data->rrset_list);
+	return 1;
+}
diff --git a/src/tests/libknot/realdata/libknot/response_tests_realdata.h b/src/tests/libknot/realdata/libknot/response_tests_realdata.h
new file mode 100644
index 0000000..731604b
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/response_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_PACKET_response_TESTS_H_
+#define _KNOTD_PACKET_response_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api response_tests_api;
+
+#endif /* _KNOTD_PACKET_response_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/rrset_tests_realdata.c b/src/tests/libknot/realdata/libknot/rrset_tests_realdata.c
new file mode 100644
index 0000000..cb59f4c
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/rrset_tests_realdata.c
@@ -0,0 +1,289 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/realdata/libknot/rrset_tests_realdata.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/common.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/rrset.h"
+#include "libknot/dname.h"
+#include "libknot/rdata.h"
+#include "libknot/util/utils.h"
+#include "libknot/zone/node.h"
+#include "libknot/util/debug.h"
+
+static int knot_rrset_tests_count(int argc, char *argv[]);
+static int knot_rrset_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api rrset_tests_api = {
+	"DNS library - rrset",        //! Unit name
+	&knot_rrset_tests_count,  //! Count scheduled tests
+	&knot_rrset_tests_run     //! Run scheduled tests
+};
+
+/*----------------------------------------------------------------------------*/
+/*
+ *  Unit implementation.
+ */
+
+/* count1 == count2 */
+int compare_wires_simple(uint8_t *wire1, uint8_t *wire2, uint count)
+{
+	int i = 0;
+	while (i < count &&
+	       wire1[i] == wire2[i]) {
+		i++;
+	}
+	return (!(count == i));
+}
+
+
+knot_rrset_t *rrset_from_test_rrset(const test_rrset_t *test_rrset)
+{
+//	diag("owner: %s\n", test_rrset->owner->str);
+	knot_dname_t *owner =
+		knot_dname_new_from_wire(test_rrset->owner->wire,
+	                                   test_rrset->owner->size, NULL);
+
+//	diag("Created owner: %s (%p) from %p\n", knot_dname_to_str(owner),
+//	     owner, test_rrset->owner);
+
+	if (!owner) {
+		return NULL;
+	}
+
+	knot_rrset_t *ret = knot_rrset_new(owner, test_rrset->type,
+	                                       test_rrset->rclass,
+	                                       test_rrset->ttl);
+
+	/* Add rdata to rrset. */
+	knot_rdata_t *rdata = knot_rdata_new();
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(test_rrset->type);
+
+	node *n = NULL;
+	WALK_LIST(n, test_rrset->rdata_list) {
+		test_rdata_t *test_rdata = (test_rdata_t *)n;
+		if (test_rdata->count != desc->length) {
+			diag("Malformed RRSet data!");
+			knot_rdata_free(&rdata);
+			return ret;
+		}
+		assert(test_rdata->type == test_rrset->type);
+		/* Add items to the actual rdata. */
+		rdata->items = malloc(sizeof(knot_rdata_item_t) * desc->length);
+		if (rdata->items == NULL) {
+			return NULL;
+		}
+//		diag("Rdata type: %s\n", knot_rrtype_to_string(test_rrset->type));
+		for (int i = 0; i < desc->length; i++) {
+			if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+			    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME ||
+			    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME) {
+//				diag("%p\n", test_rdata->items[i].raw_data);
+				assert(test_rdata->items[i].type == TEST_ITEM_DNAME);
+				rdata->items[i].dname =
+					knot_dname_new_from_wire(test_rdata->items[i].dname->wire,
+				                                   test_rdata->items[i].dname->size,
+				                                   NULL);
+			} else {
+//				diag("%p\n", test_rdata->items[i].dname);
+				assert(test_rdata->items[i].type == TEST_ITEM_RAW_DATA);
+				assert(test_rdata->items[i].raw_data != NULL);
+				rdata->items[i].raw_data = test_rdata->items[i].raw_data;
+			}
+		}
+	}
+
+	rdata->next = rdata;
+
+	ret->rdata = rdata;
+
+	return ret;
+}
+
+extern int check_domain_name(knot_dname_t *dname, test_dname_t *test_dname);
+
+int check_rrset(const knot_rrset_t *rrset,
+                const test_rrset_t *test_rrset,
+                int check_rdata, int check_items,
+                int check_rrsigs)
+{
+	/* following implementation should be self-explanatory */
+	int errors = 0;
+
+	if (rrset == NULL) {
+		diag("RRSet not created!");
+		return 1;
+	}
+
+	errors += check_domain_name(rrset->owner, test_rrset->owner);
+
+	if (rrset->type != test_rrset->type) {
+		diag("TYPE wrong: %u (should be: %u)", rrset->type,
+		     test_rrset->type);
+		++errors;
+	}
+
+	if (rrset->rclass != test_rrset->rclass) {
+		diag("CLASS wrong: %u (should be: %u)", rrset->rclass,
+		     test_rrset->rclass);
+		++errors;
+	}
+
+	if (rrset->ttl != test_rrset->ttl) {
+		diag("TTL wrong: %u (should be: %u)", rrset->ttl,
+		     test_rrset->ttl);
+		++errors;
+	}
+
+	if (check_rdata) {
+		/* TODO use rdata_compare */
+		knot_rdata_t *rdata = rrset->rdata;
+
+		if (rdata == NULL) {
+			diag("There are no RDATAs in the RRSet");
+			++errors;
+		}
+
+		if (rdata != NULL) {
+			while (rdata->next != NULL &&
+			       rdata->next != rrset->rdata) {
+				rdata = rdata->next;
+			}
+			if (rdata->next == NULL) {
+				diag("The list of RDATAs is not cyclic!");
+				++errors;
+			} else {
+				assert(rdata->next == rrset->rdata);
+			}
+		}
+	}
+
+	/* Iterate rrset rdata list and compare items. */
+	if (check_items && rrset->rdata != NULL) {
+		knot_rrtype_descriptor_t *desc =
+			knot_rrtype_descriptor_by_type(rrset->type);
+		node *n = NULL;
+		knot_rdata_t *tmp_rdata = rrset->rdata;
+		WALK_LIST(n, test_rrset->rdata_list) {
+			test_rdata_t *test_rdata = (test_rdata_t *)n;
+			for (int i = 0; i < desc->length; i++) {
+				if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+				    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+				    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME) {
+					errors += check_domain_name(tmp_rdata->items[i].dname,
+					                            test_rdata->items[i].dname);
+				} else {
+					assert(tmp_rdata != NULL);
+					errors += compare_wires_simple((uint8_t *)tmp_rdata->items[i].raw_data,
+					          (uint8_t *)test_rdata->items[i].raw_data,
+					          test_rdata->items[i].raw_data[0]);
+				}
+			}
+		}
+	} else if (check_items && rrset->rdata == NULL) {
+		diag("Could not test items, since rdata is empty!");
+	}
+
+	if (check_rrsigs) {
+		/* there are currently no rrsigs */
+	}
+	return errors;
+}
+
+extern knot_dname_t *dname_from_test_dname(test_dname_t *test_dname);
+
+static int test_rrset_create(const list rrset_list)
+{
+	int errors = 0;
+
+	/* Test with real data. */
+	node *n = NULL;
+	WALK_LIST(n, rrset_list) {
+		test_rrset_t *test_rrset = (test_rrset_t *)n;
+		knot_rrset_t *rrset =
+			knot_rrset_new(dname_from_test_dname
+			                 (test_rrset->owner),
+		                         test_rrset->type,
+		                         test_rrset->rclass,
+		                         test_rrset->ttl);
+		assert(rrset);
+		errors += check_rrset(rrset, test_rrset, 0, 0, 0);
+		knot_rrset_deep_free(&rrset, 1, 0, 0);
+	}
+
+	return (errors == 0);
+}
+
+static int test_rrset_add_rdata(list rrset_list)
+{
+	int errors = 0;
+	node *n = NULL;
+	WALK_LIST(n, rrset_list) {
+		test_rrset_t *test_rrset = (test_rrset_t *)n;
+		knot_rrset_t *tmp_rrset = rrset_from_test_rrset(test_rrset);
+		/* TODO use all the rdata */
+		assert(tmp_rrset->rdata->next = tmp_rrset->rdata);
+		knot_rrset_t *rrset =
+			knot_rrset_new(dname_from_test_dname
+			                 (test_rrset->owner),
+		                         test_rrset->type,
+		                         test_rrset->rclass,
+		                         test_rrset->ttl);
+		assert(rrset);
+		knot_rrset_add_rdata(rrset, tmp_rrset->rdata);
+		errors += check_rrset(rrset, test_rrset, 1, 1, 1);
+		knot_rrset_free(&tmp_rrset);
+		knot_rrset_deep_free(&rrset, 1, 1, 0);
+
+	}
+	return (errors == 0);
+}
+
+static const int KNOT_RRSET_TEST_COUNT = 2;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_rrset_tests_count(int argc, char *argv[])
+{
+	return KNOT_RRSET_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_rrset_tests_run(int argc, char *argv[])
+{
+	test_data_t *data = data_for_knot_tests;
+
+	int res = 0,
+	    res_final = 1;
+
+	res = test_rrset_create(data->rrset_list);
+	ok(res, "rrset: create");
+	res_final *= res;
+
+	ok(res = test_rrset_add_rdata(data->rrset_list), "rrset: add_rdata");
+	res_final *= res;
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/rrset_tests_realdata.h b/src/tests/libknot/realdata/libknot/rrset_tests_realdata.h
new file mode 100644
index 0000000..cc3b705
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/rrset_tests_realdata.h
@@ -0,0 +1,35 @@
+/*!
+ * \file rrset_tests.h
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * Contains unit tests for RRSet (knot_rrset_t) and its API.
+ *
+ * Contains tests for:
+ * -
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_RRSET_TESTS_H_
+#define _KNOTD_RRSET_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api rrset_tests_api;
+
+#endif /* _KNOTD_RRSET_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/zone_tests_realdata.c b/src/tests/libknot/realdata/libknot/zone_tests_realdata.c
new file mode 100644
index 0000000..445997f
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/zone_tests_realdata.c
@@ -0,0 +1,335 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "tests/libknot/realdata/libknot/zone_tests_realdata.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/common.h"
+#include "libknot/zone/zone.h"
+#include "libknot/util/error.h"
+#include "libknot/zone/node.h"
+
+static int knot_zone_tests_count(int argc, char *argv[]);
+static int knot_zone_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api zone_tests_api = {
+	"DNS library - zone",        //! Unit name
+	&knot_zone_tests_count,  //! Count scheduled tests
+	&knot_zone_tests_run     //! Run scheduled tests
+};
+
+/*
+ *  Unit implementation.
+ */
+
+extern knot_dname_t *dname_from_test_dname(test_dname_t *test_dname);
+extern knot_rrset_t *rrset_from_test_rrset(test_rrset_t *test_rrset);
+
+static knot_node_t *node_from_test_node(const test_node_t *test_node)
+{
+	knot_dname_t *owner = dname_from_test_dname(test_node->owner);
+	/* TODO parent? */
+	knot_node_t *new_node = knot_node_new(owner, NULL, 0);
+	node *n = NULL;
+	WALK_LIST(n, test_node->rrset_list) {
+		test_rrset_t *test_rrset = (test_rrset_t *)n;
+		knot_rrset_t *rrset = rrset_from_test_rrset(test_rrset);
+		assert(rrset);
+		assert(knot_node_add_rrset(new_node, rrset, 0) == 0);
+	}
+
+	return new_node;
+}
+
+static int test_zone_create(list node_list)
+{
+//	knot_dname_t *dname = knot_dname_new_from_wire(
+//		test_apex.owner.name, test_apex.owner.size, NULL);
+//	assert(dname);
+	int errors = 0;
+
+	node *n = NULL;
+	WALK_LIST(n, node_list) {
+		test_node_t *test_node = (test_node_t *)n;
+		knot_node_t *node = node_from_test_node(test_node);
+		assert(node);
+
+		knot_zone_t *zone = knot_zone_new(node, 0, 0);
+		if (zone == NULL) {
+			diag("Could not create zone with owner: %s\n",
+			     test_node->owner->str);
+			errors++;
+		}
+		knot_node_free_rrsets(node, 1);
+		knot_node_free(&node, 0, 0);
+	}
+
+	return (errors == 0);
+}
+
+//static int test_zone_add_node(knot_zone_t *zone, int nsec3)
+//{
+//	/*
+//	 * NSEC3 nodes are de facto identical to normal nodes, so there is no
+//	 * need for separate tests. The only difference is where are they stored
+//	 * in the zone structure.
+//	 */
+
+//	int errors = 0;
+//	int res = 0;
+
+//	//note("Good nodes");
+
+//	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+//		knot_node_t *node = knot_node_new(&test_nodes_good[i].owner,
+//		                                     test_nodes_good[i].parent);
+//		if (node == NULL) {
+//			diag("zone: Could not create node.");
+//			return 0;
+//		}
+
+//		if ((res = ((nsec3) ? knot_zone_add_nsec3_node(zone, node)
+//		                   : knot_zone_add_node(zone, node))) != 0) {
+//			diag("zone: Failed to insert node into zone (returned"
+//			     " %d).", res);
+//			knot_node_free(&node, 0);
+//			++errors;
+//		}
+//		/* TODO check values in the node as well */
+//	}
+
+//	//note("Bad nodes");
+
+//	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+//		knot_node_t *node = knot_node_new(&test_nodes_bad[i].owner,
+//		                                    test_nodes_bad[i].parent);
+//		if (node == NULL) {
+//			diag("zone: Could not create node.");
+//			return 0;
+//		}
+
+//		if ((res = ((nsec3) ? knot_zone_add_nsec3_node(zone, node)
+//			: knot_zone_add_node(zone, node))) !=
+//		                KNOT_EBADZONE) {
+//			diag("zone: Inserting wrong node did not result in"
+//			     "proper return value (%d instead of %d).", res,
+//			     KNOT_EBADZONE);
+//			++errors;
+//		}
+//		knot_node_free(&node, 0);
+//	}
+
+//	// check if all nodes are inserted
+//	//int nodes = 0;
+//	if (!nsec3
+//	    && !test_zone_check_node(knot_zone_apex(zone), &test_apex)) {
+//		diag("zone: Apex of zone not right.");
+////		diag("Apex owner: %s (%p), apex parent: %p\n",
+////		     knot_dname_to_str(knot_zone_apex(zone)->owner),
+////		     knot_zone_apex(zone)->owner,
+////		     knot_zone_apex(zone)->parent);
+////		diag("Should be: owner: %s (%p), parent: %p\n",
+////		     knot_dname_to_str(&test_apex.owner),
+////		     &test_apex.owner,
+////		     test_apex.parent);
+//		++errors;
+//	}
+//	//++nodes;
+//	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+//		const knot_node_t *n = ((nsec3) ? knot_zone_find_nsec3_node(
+//				zone, &test_nodes_good[i].owner) :
+//			knot_zone_find_node(zone, &test_nodes_good[i].owner));
+//		if (n == NULL) {
+//			diag("zone: Missing node with owner %s",
+//			     test_nodes_good[i].owner.name);
+//			++errors;
+//			continue;
+//		}
+
+//		if (!test_zone_check_node(n, &test_nodes_good[i])) {
+//			diag("zone: Node does not match: owner: %s (should be "
+//			     "%s), parent: %p (should be %p)",
+//			     node->owner->name, test_nodes_good[i].owner.name,
+//			     node->parent, test_nodes_good[i].parent);
+//			++errors;
+//		}
+//		//++nodes;
+//	}
+
+//	//note("zone: %d nodes in the zone (including apex)", nodes);
+
+//	return (errors == 0);
+//}
+
+//static int test_zone_get_node(knot_zone_t *zone, int nsec3)
+//{
+//	int errors = 0;
+
+//	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+//		if (((nsec3) ? knot_zone_get_nsec3_node(
+//		                   zone, &test_nodes_good[i].owner)
+//			: knot_zone_get_node(zone, &test_nodes_good[i].owner))
+//			== NULL) {
+//			diag("zone: Node (%s) not found in zone.",
+//			     (char *)test_nodes_good[i].owner.name);
+//			++errors;
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+//		if (((nsec3) ? knot_zone_get_nsec3_node(
+//		                   zone, &test_nodes_bad[i].owner)
+//			: knot_zone_get_node(zone, &test_nodes_bad[i].owner))
+//			!= NULL) {
+//			diag("zone: Node (%s) found in zone even if it should"
+//			     "not be there.",
+//			     (char *)test_nodes_bad[i].owner.name);
+//			++errors;
+//		}
+//	}
+
+//	if (((nsec3)
+//	     ? knot_zone_get_nsec3_node(NULL, &test_nodes_good[0].owner)
+//	     : knot_zone_get_node(NULL, &test_nodes_good[0].owner)) != NULL) {
+//		diag("zone: Getting node from NULL zone did not result in"
+//		     "proper return value (NULL)");
+//		++errors;
+//	}
+
+//	if (((nsec3) ? knot_zone_get_nsec3_node(zone, NULL)
+//	             : knot_zone_get_node(zone, NULL)) != NULL) {
+//		diag("zone: Getting node with NULL owner from zone did not "
+//		     "result in proper return value (NULL)");
+//		++errors;
+//	}
+
+//	if (!nsec3 && knot_zone_get_node(zone, &test_apex.owner) == NULL) {
+//		diag("zone: Getting zone apex from the zone failed");
+//		++errors;
+//	}
+
+//	return (errors == 0);
+//}
+
+//static int test_zone_find_node(knot_zone_t *zone, int nsec3)
+//{
+//	int errors = 0;
+
+//	for (int i = 0; i < TEST_NODES_GOOD; ++i) {
+//		if (((nsec3) ? knot_zone_find_nsec3_node(
+//		                   zone, &test_nodes_good[i].owner)
+//		    : knot_zone_find_node(zone, &test_nodes_good[i].owner))
+//		    == NULL) {
+//			diag("zone: Node (%s) not found in zone.",
+//			     (char *)test_nodes_good[i].owner.name);
+//			++errors;
+//		}
+//	}
+
+//	for (int i = 0; i < TEST_NODES_BAD; ++i) {
+//		if (((nsec3) ? knot_zone_find_nsec3_node(
+//		                   zone, &test_nodes_bad[i].owner)
+//		    : knot_zone_find_node(zone, &test_nodes_bad[i].owner))
+//		    != NULL) {
+//			diag("zone: Node (%s) found in zone even if it should"
+//			     "not be there.",
+//			     (char *)test_nodes_bad[i].owner.name);
+//			++errors;
+//		}
+//	}
+
+//	if (((nsec3)
+//	    ? knot_zone_find_nsec3_node(NULL, &test_nodes_good[0].owner)
+//	    : knot_zone_find_node(NULL, &test_nodes_good[0].owner)) != NULL) {
+//		diag("zone: Finding node from NULL zone did not result in"
+//		     "proper return value (NULL)");
+//		++errors;
+//	}
+
+//	if (((nsec3) ? knot_zone_find_nsec3_node(zone, NULL)
+//	             : knot_zone_find_node(zone, NULL)) != NULL) {
+//		diag("zone: Finding node with NULL owner from zone did not "
+//		     "result in proper return value (NULL)");
+//		++errors;
+//	}
+
+//	if (!nsec3 && knot_zone_find_node(zone, &test_apex.owner) == NULL) {
+//		diag("zone: Finding zone apex from the zone failed");
+//		++errors;
+//	}
+
+//	return (errors == 0);
+//}
+
+static const int KNOT_ZONE_TEST_COUNT = 1;
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int knot_zone_tests_count(int argc, char *argv[])
+{
+	return KNOT_ZONE_TEST_COUNT;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int knot_zone_tests_run(int argc, char *argv[])
+{
+	int res = 0,
+	    res_final = 0;
+
+	test_data_t *data = data_for_knot_tests;
+
+	ok((res = test_zone_create(data->node_list)), "zone: create");
+	res_final *= res;
+
+//	skip(!res, 6);
+
+//	ok((res = test_zone_add_node(zone, 0)), "zone: add node");
+//	res_final *= res;
+
+//	skip(!res, 2);
+
+//	skip(!res, 1);
+
+//	ok((res = test_zone_find_node(zone, 0)), "zone: find node");
+//	res_final *= res;
+
+//	endskip; // get node failed
+
+//	endskip; // add node failed
+
+//	ok((res = test_zone_add_node(zone, 1)), "zone: add nsec3 node");
+//	res_final *= res;
+
+//	skip(!res, 2);
+
+//	skip(!res, 1);
+
+//	ok((res = test_zone_find_node(zone, 1)), "zone: find nsec3 node");
+//	res_final *= res;
+
+//	endskip; // get nsec3 node failed
+
+//	endskip; // add nsec3 node failed
+
+//	endskip; // create failed
+
+	return res_final;
+}
diff --git a/src/tests/libknot/realdata/libknot/zone_tests_realdata.h b/src/tests/libknot/realdata/libknot/zone_tests_realdata.h
new file mode 100644
index 0000000..5539709
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/zone_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ZONE_TESTS_H_
+#define _KNOTD_ZONE_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api zone_tests_api;
+
+#endif /* _KNOTD_ZONE_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.c b/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.c
new file mode 100644
index 0000000..96d1517
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.c
@@ -0,0 +1,44 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tests/libknot/realdata/libknot/zonedb_tests_realdata.h"
+
+
+static int zonedb_tests_count(int argc, char *argv[]);
+static int zonedb_tests_run(int argc, char *argv[]);
+
+/*! Exported unit API.
+ */
+unit_api zonedb_tests_api = {
+	"Zone database",      //! Unit name
+	&zonedb_tests_count,  //! Count scheduled tests
+	&zonedb_tests_run     //! Run scheduled tests
+};
+
+/*! This helper routine should report number of
+ *  scheduled tests for given parameters.
+ */
+static int zonedb_tests_count(int argc, char *argv[])
+{
+	return 0;
+}
+
+/*! Run all scheduled tests for given parameters.
+ */
+static int zonedb_tests_run(int argc, char *argv[])
+{
+	return 0;
+}
diff --git a/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.h b/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.h
new file mode 100644
index 0000000..0c4f8ef
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot/zonedb_tests_realdata.h
@@ -0,0 +1,25 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ZONEDB_TESTS_H_
+#define _KNOTD_ZONEDB_TESTS_H_
+
+#include "common/libtap/tap_unit.h"
+
+/* Unit API. */
+unit_api zonedb_tests_api;
+
+#endif /* _KNOTD_ZONEDB_TESTS_H_ */
diff --git a/src/tests/libknot/realdata/libknot_tests_loader_realdata.c b/src/tests/libknot/realdata/libknot_tests_loader_realdata.c
new file mode 100644
index 0000000..71a9c3d
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot_tests_loader_realdata.c
@@ -0,0 +1,1300 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+
+#include "common/libtap/tap.h"
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+#include "libknot/util/descriptor.h"
+
+#include "tests/libknot/realdata/parsed_data.rc"
+#include "tests/libknot/realdata/raw_data.rc"
+TREE_DEFINE(test_node, avl);
+
+/* Virtual I/O over memory. */
+static int mem_read(void *dst, size_t n, const char **src,
+		    unsigned *remaining)
+{
+//	printf("reading %u\n", n);
+	if (n > *remaining) {
+		return 0;
+	}
+
+
+	memcpy(dst, *src, n);
+	*src += n;
+	*remaining -= n;
+//	printf("remaining %u\n", *remaining);
+	return 1;
+}
+
+static int load_raw_packets(test_data_t *data, uint32_t *count,
+			    const char *src, unsigned src_size)
+{
+
+	uint16_t tmp_size = 0;
+
+	/* Packets are stored like this: [size][packet_data]+ */
+
+	if(!mem_read(count, sizeof(uint32_t), &src, &src_size)) {
+		return -1;
+	}
+
+	for (int i = 0; i < *count; i++) {
+		uint16_t query = 0;
+		if (!mem_read(&query, sizeof(query), &src, &src_size)) {
+			return -1;
+		}
+
+		if(!mem_read(&tmp_size, sizeof(uint16_t), &src, &src_size)) {
+			return -1;
+		}
+
+		test_raw_packet_t *packet = malloc(sizeof(test_raw_packet_t));
+
+
+		packet->size = tmp_size;
+		packet->data = malloc(sizeof(uint8_t) * (tmp_size));
+		if(!mem_read(packet->data,
+			     sizeof(uint8_t) * tmp_size, &src, &src_size)) {
+			return -1;
+		}
+
+		if (query) {
+			add_tail(&data->raw_query_list, (void *)packet);
+		} else {
+			add_tail(&data->raw_response_list, (void *)packet);
+		}
+
+		test_raw_packet_t *new_packet =
+			malloc(sizeof(test_raw_packet_t));
+		assert(new_packet);
+		new_packet->data = packet->data;
+		new_packet->size = packet->size;
+
+		add_tail(&data->raw_packet_list, (void *)new_packet);
+	}
+
+	return 0;
+}
+
+/* Returns size of type where avalailable */
+size_t wireformat_size_load(uint wire_type)
+{
+	switch(wire_type) {
+		case KNOT_RDATA_WF_BYTE:
+			return 1;
+			break;
+		case KNOT_RDATA_WF_SHORT:
+			return 2;
+			break;
+		case KNOT_RDATA_WF_LONG:
+			return 4;
+			break;
+		case KNOT_RDATA_WF_A:
+			return 4;
+			break;
+		case KNOT_RDATA_WF_AAAA:
+			return 16;
+			break;
+		default: /* unknown size */
+			return 0;
+			break;
+	} /* switch */
+}
+
+static int add_label(uint8_t **labels, const uint8_t label,
+                     uint *label_count)
+{
+	void *ret = realloc(*labels, sizeof(uint8_t) * (*label_count + 1));
+	if (ret == NULL) {
+		return -1;
+	}
+
+	*labels = ret;
+	(*labels)[(*label_count)++] = label;
+
+	return 0;
+}
+/* Dnames are stored label by label in the dump */
+/* TODO STRING AS WELL */
+static test_dname_t *load_test_dname(const char **src,
+				     unsigned *src_size)
+{
+	test_dname_t *ret = malloc(sizeof(test_dname_t));
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	ret->size = 0;
+	ret->str = NULL;
+	ret->labels = NULL;
+	ret->wire = NULL;
+	ret->label_count = 0;
+	ret->next = NULL;
+	ret->prev = NULL;
+
+	uint8_t label_size = 0;
+	uint8_t *label_wire = NULL;
+	uint8_t *labels = NULL;
+	char *dname_str = NULL;
+	uint label_count = 0;
+	uint dname_length = 0;
+	do {
+		/* Read label size */
+		if (!mem_read(&label_size,
+			      sizeof(uint8_t),
+			      src,
+			      src_size)) {
+			fprintf(stderr, "Faulty read\n");
+			return NULL;
+		}
+
+//		diag("%d", label_size);
+
+		add_label(&labels, ret->size, &label_count);
+
+		dname_length += label_size + 1;
+
+		label_wire = malloc(sizeof(uint8_t) * (label_size + 2));
+
+		if (label_wire == NULL) {
+			ERR_ALLOC_FAILED;
+			free(ret);
+			return NULL;
+		}
+
+		label_wire[0] = label_size;
+
+		/* Read label wire */
+		if (!mem_read(label_wire + 1,
+			      sizeof(uint8_t) *
+			      label_size,
+			      src,
+			      src_size)) {
+			free(label_wire);
+			fprintf(stderr, "Faulty read\n");
+			return NULL;
+		}
+
+		label_wire[label_size + 1] = '\0';
+
+		dname_str = malloc(sizeof(char) * (label_size + 2));
+
+		if (label_size != 0) {
+			/* n - 1 : . */
+			dname_str[label_size] = '.';
+			dname_str[label_size + 1] = '\0';
+
+			memcpy(dname_str, label_wire + 1, label_size);
+		}
+
+		if (ret->size == 0) {
+			ret->wire = malloc(sizeof(uint8_t) * (label_size + 2));
+			if (ret->wire == NULL) {
+				ERR_ALLOC_FAILED;
+				free(ret);
+				return NULL;
+			}
+
+			memcpy(ret->wire, label_wire, label_size + 2);
+
+			if (label_size != 0) {
+
+				ret->str =
+					malloc(sizeof(char) * (label_size + 2));
+				if (ret->str == NULL) {
+					ERR_ALLOC_FAILED;
+					free(ret->wire);
+					free(ret);
+					return NULL;
+				}
+
+				memcpy(ret->str, dname_str, label_size + 2);
+			}
+
+			ret->size = label_size + 2;
+		} else {
+			/* Concatenate */
+			void *p = realloc(ret->wire,
+			                  ret->size + (label_size + 2));
+			if (p == NULL) {
+				ERR_ALLOC_FAILED;
+				free(ret->wire);
+				free(ret->labels);
+				free(ret);
+				return NULL;
+			}
+			ret->wire = p;
+
+			/* TODO Safe concat? But I set the values myself, right? */
+			/* or maybe memcpy... */
+			strcat((char *)ret->wire, (char *)label_wire);
+			assert(ret->wire);
+
+
+			if (label_size != 0) {
+
+				p = realloc(ret->str,
+				            ret->size + (label_size + 2));
+				if (p == NULL) {
+					ERR_ALLOC_FAILED;
+					free(ret->wire);
+					free(ret->str);
+					free(ret->labels);
+					free(ret);
+					return NULL;
+				}
+				ret->str = p;
+
+				strcat(ret->str, dname_str);
+				assert(ret->str);
+			}
+
+			ret->size += label_size + 2;
+		}
+
+		free(label_wire);
+		free(dname_str);
+
+	} while (label_size != 0);
+
+	/*!< \warning even wireformat is ended with 0 every time !!! */
+
+	/* Root domain */
+//	if (ret->size == 0) {
+//		assert(ret->wire == NULL);
+
+//		ret->wire = malloc(sizeof(uint8_t) * 1);
+//		if (ret->wire == NULL) {
+//			ERR_ALLOC_FAILED;
+//			free(ret);
+//			return NULL;
+//		}
+
+//		ret->wire[0] = '\0';
+
+//		ret->labels = malloc(sizeof(uint8_t) * 1);
+//		if (ret->labels == NULL) {
+//			ERR_ALLOC_FAILED;
+//			free(ret->wire);
+//			free(ret);
+//			return NULL;
+//		}
+
+//		ret->labels[0] = '\0';
+//		ret->label_count = 1;
+//	}
+
+//	printf("OK: %s (%d)\n",ret->str, ret->size);
+
+	ret->labels = labels;
+	ret->size = ret->size - (label_count);
+	ret->label_count = --label_count;
+	ret->next = NULL;
+	ret->prev = NULL;
+
+	assert(ret != NULL);
+
+	return ret;
+}
+
+/*!
+ * \brief Reads dname label by label
+ */
+static test_rdata_t *load_response_rdata(uint16_t type,
+					 const char **src,
+					 unsigned *src_size)
+{
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "reading rdata for type: %s\n",
+	        knot_rrtype_to_string(type));
+#endif
+	/*
+	 * Binary format of rdata is as following:
+	 * [total_length(except for some types) - see below][rdata_item]+
+	 * Dname items are read label by label
+	 */
+
+	test_rdata_t *rdata = malloc(sizeof(test_rdata_t));
+
+	CHECK_ALLOC_LOG(rdata, NULL);
+
+	rdata->count = 0;
+	rdata->items = NULL;
+	rdata->type = 0;
+
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	assert(desc != NULL);
+
+	rdata->type = type;
+
+	test_item_t *items =
+		malloc(sizeof(test_item_t) * desc->length);
+
+	if (items == NULL) {
+		ERR_ALLOC_FAILED;
+		free(rdata);
+		return NULL;
+	}
+
+	/* TODO consider realloc */
+
+	uint16_t total_raw_data_length = 0;
+	uint8_t raw_data_length;
+
+	/*
+	 * These types have no length, unfortunatelly (python library
+	 * does not provide this)
+	 */
+	/* TODO the are more types with no length for sure ... */
+
+	if (type != KNOT_RRTYPE_A &&
+	    type != KNOT_RRTYPE_NS &&
+	    type != KNOT_RRTYPE_AAAA) {
+		if (!mem_read(&total_raw_data_length,
+		     sizeof(total_raw_data_length), src, src_size)) {
+			free(rdata);
+			free(items);
+			fprintf(stderr, "Faulty read\n");
+			return NULL;
+		}
+	}
+
+	size_t total_read = 0;
+
+	int i;
+
+	/*
+	 * TODO save number of items
+	 * in the dump - of minor importance, however
+	 */
+	for (i = 0; i < desc->length; i++) {
+		if ((desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME)) {
+			unsigned tmp_remaining = *src_size;
+			items[i].dname = load_test_dname(src, src_size);
+
+			if (items[i].dname == NULL) {
+				fprintf(stderr, "Could not load DNAME!\n");
+				free(rdata);
+				free(items);
+
+				/* TODO something like Marek's purge */
+
+				return NULL;
+			}
+
+//			diag("Created DNAME %p item: %d %s %s\n",
+//			     items[i].dname, i, knot_rrtype_to_string(type),
+//			     items[i].dname->str);
+
+			rdata->count++;
+			items[i].type = TEST_ITEM_DNAME;
+			items[i].raw_data = NULL;
+			total_read += tmp_remaining - *src_size;
+		} else {
+			if (desc->wireformat[i] ==
+			    KNOT_RDATA_WF_BINARYWITHLENGTH) {
+				if (!mem_read(&raw_data_length,
+				     sizeof(raw_data_length), src, src_size)) {
+					return NULL;
+				}
+
+				total_read++;
+
+				items[i].raw_data =
+					malloc(sizeof(uint8_t) *
+					       (raw_data_length + 3));
+
+				items[i].raw_data[0] =
+					(uint16_t) raw_data_length + 1;
+
+				/* let's store the length again */
+
+				((uint8_t *)items[i].raw_data)[2] =
+					raw_data_length;
+
+				if (!mem_read(((uint8_t *)
+				    items[i].raw_data) + 3,
+				    sizeof(uint8_t) * (raw_data_length),
+				    src, src_size)) {
+					fprintf(stderr, "Wrong read!\n");
+					return NULL;
+				}
+
+				rdata->count++;
+				items[i].type = TEST_ITEM_RAW_DATA;
+				items[i].dname = NULL;
+				total_read += sizeof(uint8_t) * raw_data_length;
+/*				printf("read len (from wire): %d\n",
+				       items[i].raw_data[0]);
+				hex_print((char *)items[i].raw_data + 1,
+					  items[i].raw_data[0]);
+				*/
+			} else {
+				/* Other type than dname or BINARYWITHLENGTH */
+				/* Set dname to NULL */
+				items[i].dname = NULL;
+
+				uint16_t size_fr_desc =
+					(uint16_t)
+					wireformat_size_load(desc->wireformat[i]);
+#ifdef RESP_TEST_DEBUG
+				fprintf(stderr, "reading %d\n", size_fr_desc);
+#endif
+
+				if (size_fr_desc == 0) { /* unknown length */
+/*					size_fr_desc = wireformat_size_n(type,
+									 items,
+									i);
+									*/
+					if ((i != desc->length - 1) &&
+					    desc->wireformat[i] !=
+					    KNOT_RDATA_WF_TEXT ) {
+						fprintf(stderr,
+						        "I dont know how "
+						"to parse this type: %d\n",
+						type);
+						return NULL;
+					} else {
+						size_fr_desc =
+						total_raw_data_length -
+						total_read;
+						if (desc->wireformat[i] ==
+						KNOT_RDATA_WF_TEXT) {
+							break;
+						}
+
+//						fprintf(stderr,
+//						        "Guessed size: %d"
+//						     " for type: %s"
+//						     " and index: %d\n",
+//						     size_fr_desc,
+//					    knot_rrtype_to_string(type),
+//						    i);
+						}
+				}
+
+				items[i].raw_data =
+				malloc(sizeof(uint8_t) * size_fr_desc + 2);
+
+//				diag("creating raw_data for item %d type %s %p\n",
+//				     i, knot_rrtype_to_string(type),
+//				     items[i].raw_data);
+
+				if (items[i].raw_data == NULL) {
+					ERR_ALLOC_FAILED;
+					free(rdata);
+					free(items);
+					return NULL;
+				}
+
+				items[i].raw_data[0] = size_fr_desc;
+
+				if (!mem_read(items[i].raw_data + 1,
+					      size_fr_desc,
+					      src, src_size)) {
+					fprintf(stderr, "Wrong read\n!");
+					return NULL;
+				}
+
+				rdata->count++;
+				items[i].type = TEST_ITEM_RAW_DATA;
+				items[i].dname = NULL;
+				total_read += size_fr_desc;
+
+#ifdef RESP_TEST_DEBUG
+				fprintf(stderr,
+				        "read len (from descriptor): %d\n",
+				       items[i].raw_data[0]);
+/*				hex_print((char *)items[i].raw_data + 1,
+					  items[i].raw_data[0]); */
+
+				if (desc->zoneformat[i] ==
+				    KNOT_RDATA_ZF_ALGORITHM) {
+					hex_print((char *)items[i].raw_data,
+						  items[i].raw_data[0] + 2);
+				} else {
+					hex_print((char *)items[i].raw_data,
+						  items[i].raw_data[0] + 2);
+				}
+#endif
+			}
+		}
+	}
+
+/*	if (knot_rdata_set_items(rdata, items, i) != 0) {
+		diag("Error: could not set items\n");
+		return NULL;
+	} */
+
+	rdata->items = items;
+
+	return rdata;
+}
+
+static test_rrset_t *load_response_rrset(const char **src, unsigned *src_size,
+					   char is_question)
+{
+	test_rrset_t *rrset = NULL;
+	uint16_t rrset_type = 0;
+	uint16_t rrset_class = 0;
+	uint32_t rrset_ttl = 0;
+
+	/* Each rrset will only have one rdata entry */
+
+	/*
+	 * RRSIGs will be read as separate RRSets because that's the way they
+	 * are stored in responses
+	 */
+
+	/* Read owner first */
+
+	uint8_t dname_size;
+//	uint8_t *dname_wire = NULL;
+
+	rrset = malloc(sizeof(test_rrset_t));
+
+	rrset->rrsigs = NULL;
+
+	CHECK_ALLOC_LOG(rrset, NULL);
+
+	init_list(&rrset->rdata_list);
+
+	/* TODO change in dump, size is useless now! */
+	if (!mem_read(&dname_size, sizeof(dname_size), src, src_size)) {
+		free(rrset);
+		return NULL;
+	}
+
+/*	dname_wire = malloc(sizeof(uint8_t) * dname_size);
+
+	CHECK_ALLOC_LOG(dname_wire, NULL);
+
+	if (!mem_read(dname_wire, sizeof(uint8_t) * dname_size, src,
+		      src_size)) {
+		free(dname_wire);
+		return NULL;
+	} */
+
+	test_dname_t *owner = load_test_dname(src, src_size);
+
+	if (owner == NULL) {
+		free(rrset);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	{
+		fprintf(stderr, "Got owner: %s", owner->str);
+	}
+#endif
+	/* Read other data */
+
+	if (!mem_read(&rrset_type, sizeof(rrset_type), src, src_size)) {
+		return NULL;
+	}
+
+	if (!mem_read(&rrset_class, sizeof(rrset_class), src, src_size)) {
+		return NULL;
+	}
+
+	if (!is_question) {
+		if (!mem_read(&rrset_ttl, sizeof(rrset_ttl), src, src_size)) {
+			return NULL;
+		}
+	} else {
+		rrset_ttl = 0;
+	}
+
+//	rrset = knot_rrset_new(owner, rrset_type, rrset_class, rrset_ttl);
+
+	rrset->owner = owner;
+	rrset->type = rrset_type;
+	rrset->rclass = rrset_class;
+	rrset->ttl = rrset_ttl;
+
+	/* Question rrsets have no rdata */
+
+	if (!is_question) {
+		test_rdata_t *tmp_rdata;
+
+		tmp_rdata = load_response_rdata(rrset->type, src, src_size);
+
+		if (tmp_rdata == NULL) {
+			fprintf(stderr,
+			        "Could not load rrset rdata - type: %d",
+			     rrset->type);
+			free(rrset);
+			return NULL;
+		}
+
+		assert(tmp_rdata->type == rrset->type);
+
+		add_tail(&rrset->rdata_list, (node *)tmp_rdata);
+	}
+
+	return rrset;
+}
+
+static test_response_t *load_parsed_response(const char **src,
+					     unsigned *src_size)
+{
+	/* Loads parsed response/query from binary format,
+	 * which is as following:
+	 * [id][qdcount][ancount][nscount][arcount]
+	 * [question_rrset+][answer_rrset+][authority_rrset+]
+	 * [additional_rrset]+
+	 */
+
+	test_response_t *resp = malloc(sizeof(test_response_t));
+
+	CHECK_ALLOC_LOG(resp, NULL);
+
+	if (!mem_read(&resp->id, sizeof(resp->id), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "id %d\n", resp->id);
+#endif
+
+	if (!mem_read(&resp->qdcount, sizeof(resp->qdcount), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "qdcount: %d\n", resp->qdcount);
+#endif
+
+	if (!mem_read(&resp->ancount, sizeof(resp->ancount), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "ancount: %d\n", resp->ancount);
+#endif
+
+	if (!mem_read(&resp->nscount, sizeof(resp->nscount), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "nscount: %d\n", resp->nscount);
+#endif
+
+	if (!mem_read(&resp->arcount, sizeof(resp->arcount), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+#ifdef RESP_TEST_DEBUG
+	fprintf(stderr, "arcount: %d\n", resp->arcount);
+#endif
+
+	if (!mem_read(&resp->query, sizeof(resp->query), src, src_size)) {
+		free(resp);
+		return NULL;
+	}
+
+	test_rrset_t **question_rrsets;
+
+	question_rrsets = malloc(sizeof(test_rrset_t *) * resp->qdcount);
+
+	for (int i = 0; i < resp->qdcount; i++) {
+		question_rrsets[i] = load_response_rrset(src, src_size, 1);
+		if (question_rrsets[i] == NULL) {
+			fprintf(stderr, "Could not load question rrsets\n");
+
+			for (int j = 0; j < i; j++) {
+				free(question_rrsets[i]);
+			}
+			free(question_rrsets);
+			free(resp);
+			return NULL;
+		}
+	}
+
+	/* only one question in our case */
+
+	resp->qname = question_rrsets[0]->owner;
+	resp->qtype = question_rrsets[0]->type;
+	resp->qclass = question_rrsets[0]->rclass;
+
+	resp->question = NULL;
+
+/*	for (int i = 0; i < resp->qdcount; i++) {
+		knot_rrset_free(&(question_rrsets[i]));
+	} */
+
+	free(question_rrsets);
+
+	test_rrset_t *tmp_rrset = NULL;
+
+	if (resp->ancount > 0) {
+		resp->answer =
+			malloc(sizeof(test_rrset_t *) * resp->ancount);
+	} else {
+		resp->answer = NULL;
+	}
+
+	for (int i = 0; i < resp->ancount; i++) {
+		tmp_rrset = load_response_rrset(src, src_size, 0);
+		resp->answer[i] = tmp_rrset;
+		if (resp->answer[i] == NULL) {
+			fprintf(stderr, "Could not load answer rrsets\n");
+			free(resp->answer);
+			free(resp);
+			return NULL;
+		}
+	}
+
+	if (resp->nscount > 0) {
+		resp->authority =
+			malloc(sizeof(test_rrset_t *) * resp->nscount);
+	} else {
+		resp->authority = NULL;
+	}
+
+	for (int i = 0; i < resp->nscount; i++) {
+		tmp_rrset = load_response_rrset(src, src_size, 0);
+		resp->authority[i] = tmp_rrset;
+		if (resp->authority[i] == NULL) {
+			fprintf(stderr, "Could not load authority rrsets\n");
+			free(resp->authority);
+			free(resp->answer);
+			free(resp);
+			return NULL;
+		}
+	}
+
+	if (resp->arcount > 0) {
+		resp->additional =
+			malloc(sizeof(test_rrset_t *) * resp->arcount);
+	} else {
+		resp->additional = NULL;
+	}
+
+	for (int i = 0; i < resp->arcount; i++) {
+		tmp_rrset = load_response_rrset(src, src_size, 0);
+		if (tmp_rrset == NULL) {
+			fprintf(stderr, "Could not load rrset (additional)\n");
+			free(resp->additional);
+			free(resp->authority);
+			free(resp->answer);
+			free(resp);
+			return NULL;
+		}
+
+		resp->additional[i] = tmp_rrset;
+	}
+
+	/* this will never be used */
+
+	resp->flags1 = 0;
+	resp->flags2 = 0;
+
+	return resp;
+}
+
+static void test_dname_free(test_dname_t **dname)
+{
+	assert(dname != NULL && *dname != NULL);
+	free((*dname)->labels);
+//	free((*dname)->str);
+	free((*dname)->wire);
+
+	free(*dname);
+	*dname = NULL;
+}
+
+static int wire_is_dname(uint type)
+{
+	return (type == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+	        type == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+	        type == KNOT_RDATA_WF_LITERAL_DNAME);
+}
+
+static void test_rdata_free(test_rdata_t **rdata)
+{
+	assert(rdata != NULL && *rdata != NULL);
+
+	/* Free all the items */
+	const knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type((*rdata)->type);
+
+	for (int i = 0; i < (*rdata)->count; i++) {
+		if ((wire_is_dname(desc->wireformat[i])) &&
+		    ((*rdata)->items[i].dname != NULL)) {
+			test_dname_free(&(*rdata)->items[i].dname);
+		} else if ((*rdata)->items[i].raw_data != NULL) {
+			free((*rdata)->items[i].raw_data);
+			(*rdata)->items[i].raw_data = NULL;
+		}
+	}
+//	free((*rdata)->items);
+//	free(*rdata);
+	*rdata = NULL;
+}
+
+static void test_rrset_free(test_rrset_t **rrset)
+{
+	assert(rrset && *rrset);
+
+	test_dname_free(&(*rrset)->owner);
+	/* Free all the rdatas */
+	node *n = NULL, *nxt = NULL;
+	WALK_LIST_DELSAFE(n, nxt, (*rrset)->rdata_list) {
+		test_rdata_t *tmp_rdata = (test_rdata_t *)n;
+		assert(tmp_rdata);
+		if (tmp_rdata != NULL) {
+			test_rdata_free(&tmp_rdata);
+		}
+	}
+
+	free(*rrset);
+	*rrset = NULL;
+}
+
+static void test_response_free(test_response_t **response)
+{
+	assert(response && *response);
+	if ((*response)->qname != NULL) {
+		test_dname_free(&(*response)->qname);
+	}
+
+	if ((*response)->additional != NULL) {
+		for (int j = 0; j < (*response)->arcount; j++) {
+			test_rrset_free(&((*response)->additional[j]));
+		}
+
+		free((*response)->additional);
+	}
+
+	if ((*response)->answer != NULL) {
+		for (int j = 0; j < (*response)->ancount; j++) {
+			test_rrset_free(&((*response)->answer[j]));
+		}
+
+		free((*response)->answer);
+	}
+
+	if ((*response)->authority != NULL) {
+		for (int j = 0; j < (*response)->nscount; j++) {
+			test_rrset_free(&((*response)->authority[j]));
+		}
+
+		free((*response)->authority);
+	}
+
+	free((*response));
+	*response = NULL;
+}
+
+static void get_and_save_data_from_rdata(test_rdata_t *rdata,
+                                         test_data_t *data, uint16_t type)
+{
+	/* We only want to extract dnames */
+	const knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+
+	if (rdata->count == 0) {
+//		diag("Rdata count not set!\n");
+		rdata->count = desc->length;
+	}
+
+	for(int i = 0; i < rdata->count; i++) {
+		if ((desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME)) {
+			add_tail(&data->dname_list,
+			         (node *)rdata->items[i].dname);
+			test_item_t *temp_item = malloc(sizeof(test_item_t));
+			temp_item->dname = rdata->items[i].dname;
+			temp_item->type = TEST_ITEM_DNAME;
+			temp_item->raw_data = NULL;
+			add_tail(&data->item_list, (node *)temp_item);
+		} else {
+			test_item_t *temp_item = malloc(sizeof(test_item_t));
+			temp_item->dname = NULL;
+			temp_item->type = TEST_ITEM_RAW_DATA;
+			temp_item->raw_data = rdata->items[i].raw_data;
+			add_tail(&data->item_list, (node *)temp_item);
+		}
+	}
+}
+
+static void get_and_save_data_from_rrset(const test_rrset_t *rrset,
+                                         test_data_t *data)
+{
+//	knot_rrtype_descriptor_t *desc =
+//		knot_rrtype_descriptor_by_type(rrset->type);
+	/* RDATA are in a list. */
+	node *n = NULL;
+	int i = 0;
+	WALK_LIST(n, rrset->rdata_list) {
+		test_rdata_t *tmp_rdata = (test_rdata_t *)n;
+		assert(tmp_rdata);
+		assert(&data->rdata_list);
+		assert(&data->rdata_list != &rrset->rdata_list);
+		assert(tmp_rdata->type == rrset->type);
+
+		test_rdata_t *new_rdata = malloc(sizeof(test_rdata_t));
+		new_rdata->count = tmp_rdata->count;
+		new_rdata->items = tmp_rdata->items;
+		new_rdata->type = tmp_rdata->type;
+
+		add_tail(&data->rdata_list, (node *)new_rdata);
+		get_and_save_data_from_rdata(tmp_rdata, data, rrset->type);
+		i++;
+	}
+	assert(i == 1);
+}
+
+static int add_rrset_to_node(const test_rrset_t *rrset, test_data_t *data)
+{
+	/* First, create node from rrset */
+	test_node_t *tmp_node = malloc(sizeof(test_node_t));
+	memset(tmp_node, 0, sizeof(test_node_t));
+	CHECK_ALLOC_LOG(tmp_node, -1);
+
+	tmp_node->owner = rrset->owner;
+	tmp_node->parent = NULL;
+	tmp_node->rrset_count = 0;
+
+	/* Will not be used in list now */
+	tmp_node->prev = NULL;
+	tmp_node->next = NULL;
+
+
+//	printf("%s\n", rrset->owner->wire);
+//	getchar();
+
+/*	tmp_node->avl_left = NULL;
+	tmp_node->avl_right = NULL;
+	tmp_node->avl_height = 0; */
+
+	test_node_t *found_node =
+		TREE_FIND(data->node_tree, test_node, avl, tmp_node);
+
+	if (found_node == NULL) {
+		/* Insert new node with current rrset */
+		init_list(&tmp_node->rrset_list);
+		add_tail(&tmp_node->rrset_list, (node *)rrset);
+		tmp_node->rrset_count++;
+
+		TREE_INSERT(data->node_tree, test_node, avl, tmp_node);
+	} else {
+		free(tmp_node);
+		/* append rrset */
+
+		add_tail(&found_node->rrset_list, (node *)rrset);
+		found_node->rrset_count++;
+	}
+
+	return 0;
+}
+
+static void get_and_save_data_from_response(const test_response_t *response,
+                                            test_data_t *data)
+{
+	/* Go through all the rrsets in the response */
+
+	for (int i = 0; i < response->ancount; i++) {
+		assert(response->answer[i]);
+		/* Add rrset to the list of rrsets - there will be duplicates
+		 * But not the same pointers */
+		add_tail(&data->rrset_list, (node *)response->answer[i]);
+		get_and_save_data_from_rrset(response->answer[i], data);
+		if (add_rrset_to_node(response->answer[i], data) != 0) {
+			return;
+		}
+	}
+
+	for (int i = 0; i < response->arcount; i++) {
+		/* Add rrset to the list of rrsets - there will be duplicates */
+		assert(response->additional[i]);
+		add_tail(&data->rrset_list, (node *)response->additional[i]);
+		get_and_save_data_from_rrset(response->additional[i], data);
+		if (add_rrset_to_node(response->additional[i], data) != 0) {
+			return;
+		}
+	}
+
+	for (int i = 0; i < response->nscount; i++) {
+		assert(response->authority[i]);
+		/* Add rrset to the list of rrsets - there will be duplicates */
+		add_tail(&data->rrset_list, (node *)response->authority[i]);
+		get_and_save_data_from_rrset(response->authority[i], data);
+		if (add_rrset_to_node(response->authority[i], data) != 0) {
+			return;
+		}
+	}
+
+//	for (int i = 0; i < response->qdcount; i++) {
+//		/* Add rrset to the list of rrsets - there will be duplicates */
+//		add_tail(&data->rrset_list, (node *)response->question[i]);
+//		get_and_save_data_from_rrset(response->question[i], data);
+//	}
+}
+
+static int load_parsed_responses(test_data_t *data, uint32_t *count,
+				 const char* src, unsigned src_size)
+{
+	if (!mem_read(count, sizeof(*count), &src, &src_size)) {
+		fprintf(stderr, "Wrong read\n");
+		return -1;
+	}
+
+//	*responses = malloc(sizeof(test_response_t *) * *count);
+
+	for (int i = 0; i < *count; i++) {
+		test_response_t *tmp_response =
+			load_parsed_response(&src, &src_size);
+
+		if (tmp_response == NULL) {
+			fprintf(stderr, "Could not load response - %d"
+			        "- returned NULL\n",
+			     i);
+			return -1;
+		}
+
+		if (tmp_response->query) {
+			add_tail(&data->query_list, (node *)tmp_response);
+		} else {
+			add_tail(&data->response_list, (node *)tmp_response);
+		}
+
+		/* Create new node */
+		test_response_t *resp = malloc(sizeof(test_response_t));
+		assert(resp);
+		memcpy(resp, tmp_response, sizeof(test_response_t));
+		add_tail(&data->packet_list,
+		         (node *)resp);
+	}
+
+	return 0;
+}
+
+//void free_parsed_responses(test_response_t ***responses, uint32_t *count)
+//{
+//	if (*responses != NULL) {
+//		for (int i = 0; i < *count; i++) {
+//			free_parsed_response((*responses)[i]);
+//		}
+//		free(*responses);
+//	}
+//}
+
+static int compare_nodes(test_node_t *node1, test_node_t *node2)
+{
+	assert(node1->owner && node2->owner);
+	/*!< \warning Wires have to be \0 terminated. */
+	return (strcmp((char *)node1->owner->wire, (char *)node2->owner->wire));
+}
+
+static int init_data(test_data_t *data)
+{
+	if (data == NULL) {
+		return 0;
+	}
+
+	/* Initialize all the lists */
+	init_list(&data->dname_list);
+	init_list(&data->edns_list);
+	init_list(&data->node_list);
+	init_list(&data->response_list);
+	init_list(&data->rdata_list);
+	init_list(&data->rrset_list);
+	init_list(&data->item_list);
+	init_list(&data->raw_response_list);
+	init_list(&data->raw_query_list);
+	init_list(&data->raw_packet_list);
+	init_list(&data->query_list);
+	init_list(&data->packet_list);
+
+	data->node_tree = malloc(sizeof(avl_tree_test_t));
+	CHECK_ALLOC_LOG(data->node_tree, 0);
+
+	TREE_INIT(data->node_tree, compare_nodes);
+
+	return 1;
+}
+
+static void print_stats(test_data_t *data)
+{
+	uint resp_count = 0, dname_count = 0, node_count = 0,
+	     rdata_count = 0, rrset_count = 0, item_count = 0, query_count = 0,
+	     raw_query_count = 0, response_count = 0, packet_count = 0,
+	     raw_packet_count = 0, raw_response_count = 0;
+
+	node *n = NULL; /* Will not be used */
+
+	WALK_LIST(n, data->response_list) {
+		resp_count++;
+	}
+
+	WALK_LIST(n, data->rrset_list) {
+//		node *tmp = NULL;
+//		assert(((test_rrset_t *)n)->owner);
+//		WALK_LIST(tmp, ((test_rrset_t *)n)->rdata_list) {
+//			test_rdata_t *rdata = (test_rdata_t *)tmp;
+//			assert(rdata->type == ((test_rrset_t *)n)->type);
+//		}
+		rrset_count++;
+	}
+
+	WALK_LIST(n, data->rdata_list) {
+		rdata_count++;
+	}
+
+	WALK_LIST(n, data->dname_list) {
+		dname_count++;
+	}
+
+	WALK_LIST(n, data->node_list) {
+		node_count++;
+	}
+
+	WALK_LIST(n, data->item_list) {
+		item_count++;
+	}
+
+	WALK_LIST(n, data->raw_response_list) {
+		raw_response_count++;
+	}
+
+	WALK_LIST(n, data->query_list) {
+		query_count++;
+	}
+
+	WALK_LIST(n, data->response_list) {
+		response_count++;
+	}
+
+	WALK_LIST(n, data->raw_query_list) {
+		raw_query_count++;
+	}
+
+	WALK_LIST(n, data->packet_list) {
+		packet_count++;
+	}
+
+	WALK_LIST(n, data->raw_packet_list) {
+		raw_packet_count++;
+	}
+
+	printf("Loaded: Responses: %d RRSets: %d RDATAs: %d Dnames: %d "
+	       "Nodes: %d Items: %d Raw_responses: %d Queries: %d \n"
+	       "Raw_queries; %d Total packets: %d Total_raw_packets: %d\n", resp_count, rrset_count,
+	       rdata_count, dname_count, node_count, item_count,
+	       raw_response_count, query_count, raw_query_count, packet_count,
+	       raw_packet_count);
+}
+
+static void save_node_to_list(test_node_t *n, void *p)
+{
+	test_data_t *data = (test_data_t *)p;
+
+	add_tail(&data->node_list, (node *)n);
+}
+
+static void del_node(test_node_t *n, void *p)
+{
+//	test_data_t *data = (test_data_t *)p;
+	free(n);
+}
+
+
+void free_data(test_data_t **data)
+{
+	assert(data && *data);
+	/* We will free all the data using responses
+	 * (others are just references )*/
+	node *n = NULL, *nxt = NULL;
+	WALK_LIST_DELSAFE(n, nxt, (*data)->response_list) {
+		test_response_t *tmp_response = (test_response_t *)n;
+		if (tmp_response != NULL) {
+			test_response_free(&tmp_response);
+		}
+	}
+
+	TREE_POST_ORDER_APPLY((*data)->node_tree, test_node, avl, del_node,
+	                      NULL);
+
+	free((*data)->node_tree);
+
+	free(*data);
+	*data = NULL;
+}
+
+test_data_t *create_test_data_from_dump()
+{
+	test_data_t *ret = malloc(sizeof(test_data_t));
+	CHECK_ALLOC_LOG(ret, NULL);
+
+	if (!init_data(ret)) {
+		free(ret);
+		return NULL;
+	}
+
+	uint32_t raw_packet_count = 0;
+
+	if (load_raw_packets(ret, &raw_packet_count, raw_data_rc,
+	                     raw_data_rc_size) != 0) {
+		fprintf(stderr, "Could not load raw_data, quitting");
+		/* TODO walk the lists*/
+		free(ret);
+		return NULL;
+	}
+
+	uint32_t response_count = 0;
+
+	if (load_parsed_responses(ret, &response_count, parsed_data_rc,
+	                          parsed_data_rc_size) != 0) {
+		fprintf(stderr, "Could not load responses, quitting");
+		/* TODO walk the lists*/
+		free(ret);
+		return NULL;
+	}
+
+	/* For each parsed response - create more data from it. */
+	/* Probably not the most effective way, but it is better than to
+	 * rewrite most of the code .*/
+
+	node *n = NULL;
+
+	WALK_LIST(n , ret->response_list) {
+		get_and_save_data_from_response((test_response_t *)n, ret);
+	}
+
+	/* Create list from AVL tree */
+
+	TREE_FORWARD_APPLY(ret->node_tree, test_node, avl,
+	                   save_node_to_list, ret);
+
+	print_stats(ret);
+
+	return ret;
+}
diff --git a/src/tests/libknot/realdata/libknot_tests_loader_realdata.h b/src/tests/libknot/realdata/libknot_tests_loader_realdata.h
new file mode 100644
index 0000000..8f57944
--- /dev/null
+++ b/src/tests/libknot/realdata/libknot_tests_loader_realdata.h
@@ -0,0 +1,179 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KNOT_TESTS_LOADER_H
+#define KNOT_TESTS_LOADER_H
+
+#include <stdint.h>
+
+#include "libknot/common.h"
+#include "common/lists.h"
+#include "common/tree.h"
+
+
+/* Parsed raw packet*/
+struct test_raw_packet {
+	struct node *next, *prev;
+	uint size;
+	uint8_t *data;
+};
+
+typedef struct test_raw_packet test_raw_packet_t;
+
+/* Test type definitions */
+
+struct test_dname {
+	struct node *next, *prev;
+	char *str;
+	uint8_t *wire;
+	uint size;
+	uint8_t *labels;
+	short label_count;
+};
+
+typedef struct test_dname test_dname_t;
+
+struct test_edns_options {
+	struct node *next, *prev;
+	uint16_t code;
+	uint16_t length;
+	uint8_t *data;
+};
+
+struct test_edns {
+	struct node *next, *prev;
+	struct test_edns_options *options;
+	uint16_t payload;
+	uint8_t ext_rcode;
+	uint8_t version;
+	uint16_t flags;
+	uint16_t *wire;
+	short option_count;
+	short options_max;
+	short size;
+};
+
+typedef struct test_edns test_edns_t;
+
+typedef TREE_HEAD(avl_tree_test, test_node) avl_tree_test_t;
+
+struct test_node {
+	struct node *next, *prev;
+	test_dname_t *owner;
+	short rrset_count;
+	struct test_node *parent;
+	list rrset_list;
+
+	TREE_ENTRY(test_node) avl;
+};
+
+typedef struct test_node test_node_t;
+
+enum item_type {
+	TEST_ITEM_DNAME,
+	TEST_ITEM_RAW_DATA
+};
+
+typedef enum item_type item_type_t;
+
+struct test_item {
+	uint16_t *raw_data;
+	test_dname_t *dname;
+	item_type_t type;
+};
+
+typedef struct test_item test_item_t;
+
+struct test_rdata {
+	struct node *next, *prev;
+	uint count;
+	uint type;  /*!< Might be handy */
+	test_item_t *items;
+};
+
+typedef struct test_rdata test_rdata_t;
+
+struct test_rrset {
+	struct node *next, *prev;
+	test_dname_t *owner;
+	uint16_t type;
+	uint16_t rclass;
+	uint32_t  ttl;
+	struct test_rrset *rrsigs;
+	uint16_t *wire;
+	list rdata_list;
+};
+
+typedef struct test_rrset test_rrset_t;
+
+struct test_response {
+	struct node *next, *prev;
+	/* This is basically same thing as actual response structure */
+	uint16_t query;
+	test_dname_t *qname;
+	uint16_t qclass;
+	uint16_t qtype;
+	uint16_t id;
+	uint8_t flags1;
+	uint8_t flags2;
+	uint16_t qdcount;
+	uint16_t ancount;
+	uint16_t nscount;
+	uint16_t arcount;
+
+	/* Arrays of rrsets */
+
+	test_rrset_t **question;
+	test_rrset_t **answer;
+	test_rrset_t **authority;
+	test_rrset_t **additional;
+
+	short size;
+
+	/* what about the rest of the values?
+	 * they cannot be modified from API, but this is probably the best
+	 * place to test them as well */
+};
+
+typedef struct test_response test_response_t;
+
+/*!< \brief contains lists of all the structures */
+struct test_data {
+	list dname_list;
+	list edns_list;
+	list rdata_list;
+	list node_list;
+	list rrset_list;
+	list response_list;
+	list raw_response_list;
+	list query_list;
+	list raw_query_list;
+	list item_list;
+	/* responses and queries together */
+	list packet_list;
+	list raw_packet_list;
+
+	avl_tree_test_t *node_tree;
+};
+
+typedef struct test_data test_data_t;
+
+/*!< \brief Parses resource with data and creates all possible structures. */
+test_data_t *create_test_data_from_dump();
+
+test_data_t *data_for_knot_tests;
+
+#endif // KNOT_TESTS_LOADER_H
diff --git a/src/tests/libknot/realdata/unittests_libknot_realdata.c b/src/tests/libknot/realdata/unittests_libknot_realdata.c
new file mode 100644
index 0000000..e557c43
--- /dev/null
+++ b/src/tests/libknot/realdata/unittests_libknot_realdata.c
@@ -0,0 +1,93 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+//#include "knot/common.h"
+#include "common/libtap/tap_unit.h"
+
+#include "tests/libknot/realdata/libknot_tests_loader_realdata.h"
+
+// Units to test
+#include "tests/libknot/realdata/libknot/dname_tests_realdata.h"
+#include "tests/libknot/realdata/libknot/response_tests_realdata.h"
+//#include "libknot/edns_tests.h"
+#include "tests/libknot/realdata/libknot/node_tests_realdata.h"
+#include "tests/libknot/realdata/libknot/rdata_tests_realdata.h"
+//#include "libknot/response_tests_realdata.h"
+#include "tests/libknot/realdata/libknot/rrset_tests_realdata.h"
+//#include "libknot/zone_tests_realdata.h"
+#include "tests/libknot/realdata/libknot/zonedb_tests_realdata.h"
+#include "tests/libknot/realdata/libknot/packet_tests_realdata.h"
+
+#include "common/lists.h"
+// Run all loaded units
+int main(int argc, char *argv[])
+{
+	data_for_knot_tests = create_test_data_from_dump();
+
+	if (data_for_knot_tests == NULL) {
+		diag("Data could not be loaded!");
+		return 0;
+	}
+
+	// Open log
+//	log_init(LOG_UPTO(LOG_ERR), LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING));
+
+	// Build test set
+	unit_api *tests[] = {
+
+		/* DNS units */
+//		&cuckoo_tests_api,   //! Cuckoo hashing unit
+		&dname_tests_api,    //! DNS library (dname) unit
+//		&edns_tests_api,     //! DNS library (EDNS0) unit
+		&node_tests_api,     //! DNS library (node) unit
+		&rdata_tests_api,    //! DNS library (rdata) unit
+		&packet_tests_api,
+//		&response_tests_api, //! DNS library (response) unit
+		&response_tests_api, //! DNS library (response) unit
+		&rrset_tests_api,    //! DNS library (rrset) unit
+//		&zone_tests_api,     //! DNS library (zone) unit
+//		&zonedb_tests_api,   //! DNS library (zonedb) unit
+		NULL
+	};
+
+	// Plan number of tests
+	int id = 0;
+	int test_count = 0;
+	note("Units:");
+	while (tests[id] != NULL) {
+		note("- %s : %d tests", tests[id]->name,
+		     tests[id]->count(argc, argv));
+		test_count += tests[id]->count(argc, argv);
+		++id;
+	}
+
+	plan(test_count);
+
+	// Run tests
+	id = 0;
+	while (tests[id] != NULL) {
+		diag("Testing unit: %s", tests[id]->name);
+		tests[id]->run(argc, argv);
+		++id;
+	}
+
+//	log_close();
+
+	// Evaluate
+	return exit_status();
+}
+
diff --git a/src/tests/libknot/unittests_libknot.c b/src/tests/libknot/unittests_libknot.c
new file mode 100644
index 0000000..62d4b90
--- /dev/null
+++ b/src/tests/libknot/unittests_libknot.c
@@ -0,0 +1,90 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "knot/common.h"
+#include "common/libtap/tap_unit.h"
+
+// Units to test
+#include "tests/libknot/libknot/cuckoo_tests.h"
+#include "tests/libknot/libknot/dname_tests.h"
+#include "tests/libknot/libknot/edns_tests.h"
+#include "tests/libknot/libknot/node_tests.h"
+#include "tests/libknot/libknot/rdata_tests.h"
+#include "tests/libknot/libknot/response_tests.h"
+#include "tests/libknot/libknot/rrset_tests.h"
+#include "tests/libknot/libknot/zone_tests.h"
+#include "tests/libknot/libknot/dname_table_tests.h"
+#include "tests/libknot/libknot/nsec3_tests.h"
+#include "tests/libknot/libknot/packet_tests.h"
+#include "tests/libknot/libknot/query_tests.h"
+#include "tests/libknot/libknot/zonedb_tests.h"
+#include "tests/libknot/libknot/zone_tree_tests.h"
+
+// Run all loaded units
+int main(int argc, char *argv[])
+{
+	// Open log
+//	log_init(LOG_UPTO(LOG_ERR), LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING));
+
+	// Build test set
+	unit_api *tests[] = {
+
+		/* DNS units */
+		&cuckoo_tests_api,   //! Cuckoo hashing unit
+		&dname_tests_api,    //! DNS library (dname) unit
+		&edns_tests_api,     //! DNS library (EDNS0) unit
+		&zone_tests_api,     //! DNS library (zone) unit
+		&node_tests_api,     //! DNS library (node) unit
+		&rdata_tests_api,    //! DNS library (rdata) unit
+		&response_tests_api, //! DNS library (response) unit
+		&rrset_tests_api,    //! DNS library (rrset) unit
+		&dname_table_tests_api,
+		&nsec3_tests_api,
+		&packet_tests_api,
+		&query_tests_api,
+		&zonedb_tests_api,   //! DNS library (zonedb) unit
+		&zone_tree_tests_api,
+		NULL
+	};
+
+	// Plan number of tests
+	int id = 0;
+	int test_count = 0;
+	note("Units:");
+	while (tests[id] != NULL) {
+		note("- %s : %d tests", tests[id]->name,
+		     tests[id]->count(argc, argv));
+		test_count += tests[id]->count(argc, argv);
+		++id;
+	}
+
+	plan(test_count);
+
+	// Run tests
+	id = 0;
+	while (tests[id] != NULL) {
+		diag("Testing unit: %s", tests[id]->name);
+		tests[id]->run(argc, argv);
+		++id;
+	}
+
+//	log_close();
+
+	// Evaluate
+	return exit_status();
+}
+
diff --git a/src/tests/unittests_main.c b/src/tests/unittests_main.c
new file mode 100644
index 0000000..2d57ed2
--- /dev/null
+++ b/src/tests/unittests_main.c
@@ -0,0 +1,84 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "knot/common.h"
+#include "common/libtap/tap_unit.h"
+
+// Units to test
+#include "tests/common/slab_tests.h"
+#include "tests/common/skiplist_tests.h"
+#include "tests/common/events_tests.h"
+#include "tests/common/da_tests.h"
+#include "tests/common/acl_tests.h"
+#include "tests/common/fdset_tests.h"
+#include "tests/knot/dthreads_tests.h"
+#include "tests/knot/journal_tests.h"
+#include "tests/knot/server_tests.h"
+#include "tests/knot/conf_tests.h"
+
+// Run all loaded units
+int main(int argc, char *argv[])
+{
+	// Open log
+	log_init();
+	log_levels_set(LOGT_SYSLOG, LOG_ANY, 0);
+
+	// Build test set
+	unit_api *tests[] = {
+		/* Core data structures. */
+		&journal_tests_api,  //! Journal unit
+		&slab_tests_api,     //! SLAB allocator unit
+		&skiplist_tests_api, //! Skip list unit
+		&dthreads_tests_api, //! DThreads testing unit
+		&events_tests_api,   //! Events testing unit
+		&da_tests_api,       //! Dynamic array unit
+		&acl_tests_api,      //! ACLs
+		&fdset_tests_api, //! FDSET polling wrapper
+
+		/* Server parts. */
+		&conf_tests_api,     //! Configuration parser tests
+		&server_tests_api,   //! Server unit
+		NULL
+	};
+
+	// Plan number of tests
+	int id = 0;
+	int test_count = 0;
+	note("Units:");
+	while (tests[id] != NULL) {
+		note("- %s : %d tests", tests[id]->name,
+		     tests[id]->count(argc, argv));
+		test_count += tests[id]->count(argc, argv);
+		++id;
+	}
+
+	plan(test_count);
+
+	// Run tests
+	id = 0;
+	while (tests[id] != NULL) {
+		diag("Testing unit: %s", tests[id]->name);
+		tests[id]->run(argc, argv);
+		++id;
+	}
+
+	log_close();
+
+	// Evaluate
+	return exit_status();
+}
+
diff --git a/src/zcompile/LICENSE b/src/zcompile/LICENSE
new file mode 100644
index 0000000..55faacf
--- /dev/null
+++ b/src/zcompile/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
+
+This software is open source.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+Neither the name of the NLNET LABS nor the names of its contributors may
+be used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/zcompile/parser-descriptor.c b/src/zcompile/parser-descriptor.c
new file mode 100644
index 0000000..41e7f2d
--- /dev/null
+++ b/src/zcompile/parser-descriptor.c
@@ -0,0 +1,535 @@
+/*!
+ * \file parser-descriptor.c
+ *
+ * \author Modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         most of the work by NLnet Labs.
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief Contains resource record descriptor and its API
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+#include <string.h>
+#include <sys/types.h>
+
+//#include "common.h"
+#include "zcompile/parser-descriptor.h"
+/* TODO this has to be removed - move tokens to separate file
+	but can it be done?) */
+#include "zcompile/zcompile.h"
+/* FIXME: Generate .y and .l to zoneparser/ */
+#include "zparser.h"
+
+enum desclen { PARSER_RRTYPE_DESCRIPTORS_LENGTH = 32770 }; // used to be 101
+
+/* Taken from RFC 1035, section 3.2.4.  */
+static knot_lookup_table_t dns_rrclasses[] = {
+	{ PARSER_CLASS_IN, "IN" },	/* the Internet */
+	{ PARSER_CLASS_CS, "CS" },	/* the CSNET class (Obsolete) */
+	{ PARSER_CLASS_CH, "CH" },	/* the CHAOS class */
+	{ PARSER_CLASS_HS, "HS" },	/* Hesiod */
+	{ 0, NULL }
+};
+static parser_rrtype_descriptor_t
+       knot_rrtype_descriptors[PARSER_RRTYPE_DESCRIPTORS_LENGTH] = {
+	/* 0 */
+	{ 0, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 1 */
+	{ PARSER_RRTYPE_A, T_A, "A", 1, { PARSER_RDATA_WF_A }, true },
+	/* 2 */
+	{ PARSER_RRTYPE_NS, T_NS, "NS", 1,
+	{ PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 3 */
+	{ PARSER_RRTYPE_MD, T_MD, "MD", 1,
+	  { PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 4 */
+	{ PARSER_RRTYPE_MF, T_MF, "MF", 1,
+	  { PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 5 */
+	{ PARSER_RRTYPE_CNAME, T_CNAME, "CNAME", 1,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 6 */
+	{ PARSER_RRTYPE_SOA, T_SOA, "SOA", 7,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME, PARSER_RDATA_WF_COMPRESSED_DNAME,
+	    PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG,
+	    PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG }, true },
+	/* 7 */
+	{ PARSER_RRTYPE_MB, T_MB, "MB", 1,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 8 */
+	{ PARSER_RRTYPE_MG, T_MG, "MG", 1,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 9 */
+	{ PARSER_RRTYPE_MR, T_MR, "MR", 1,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 10 */
+	{ PARSER_RRTYPE_NULL, T_NULL, NULL, 1,
+	  { PARSER_RDATA_WF_BINARY }, true },
+	/* 11 */
+	{ PARSER_RRTYPE_WKS, T_WKS, "WKS", 2,
+	  { PARSER_RDATA_WF_A, PARSER_RDATA_WF_BINARY }, true },
+	/* 12 */
+	{ PARSER_RRTYPE_PTR, T_PTR, "PTR", 1,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 13 */
+	{ PARSER_RRTYPE_HINFO, T_HINFO, "HINFO", 2,
+	  { PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT }, true },
+	/* 14 */
+	{ PARSER_RRTYPE_MINFO, T_MINFO, "MINFO", 2,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME,
+	    PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 15 */
+	{ PARSER_RRTYPE_MX, T_MX, "MX", 2,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 16 */ /* This is obscure, but I guess there's no other way */
+	{ PARSER_RRTYPE_TXT, T_TXT, "TXT", PARSER_MAX_RDATA_ITEMS,
+	  { PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT }, false },
+	/* 17 */
+	{ PARSER_RRTYPE_RP, T_RP, "RP", 2,
+	  { PARSER_RDATA_WF_COMPRESSED_DNAME,
+	    PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 18 */
+	{ PARSER_RRTYPE_AFSDB, T_AFSDB, "AFSDB", 2,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 19 */
+	{ PARSER_RRTYPE_X25, T_X25, "X25", 1,
+	  { PARSER_RDATA_WF_TEXT }, true },
+	/* 20 */
+	{ PARSER_RRTYPE_ISDN, T_ISDN, "ISDN", 2,
+	  { PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT }, false },
+	/* 21 */
+	{ PARSER_RRTYPE_RT, T_RT, "RT", 2,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_COMPRESSED_DNAME }, true },
+	/* 22 */
+	{ PARSER_RRTYPE_NSAP, T_NSAP, "NSAP", 1,
+	  { PARSER_RDATA_WF_BINARY }, true },
+	/* 23 */
+	{ 23, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 24 */
+	{ PARSER_RRTYPE_SIG, T_SIG, "SIG", 9,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG,
+	    PARSER_RDATA_WF_SHORT,PARSER_RDATA_WF_UNCOMPRESSED_DNAME,
+	    PARSER_RDATA_WF_BINARY }, true },
+	/* 25 */
+	{ PARSER_RRTYPE_KEY, T_KEY, "KEY", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BINARY }, true },
+	/* 26 */
+	{ PARSER_RRTYPE_PX, T_PX, "PX", 3,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_UNCOMPRESSED_DNAME,
+	    PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 27 */
+	{ 27, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 28 */
+	{ PARSER_RRTYPE_AAAA, T_AAAA, "AAAA", 1,
+	  { PARSER_RDATA_WF_AAAA }, true },
+	/* 29 */
+	{ PARSER_RRTYPE_LOC, T_LOC, "LOC", 1,
+	  { PARSER_RDATA_WF_BINARY }, true },
+	/* 30 */
+	{ PARSER_RRTYPE_NXT, T_NXT, "NXT", 2,
+	  { PARSER_RDATA_WF_UNCOMPRESSED_DNAME,
+	    PARSER_RDATA_WF_BINARY }, true },
+	/* 31 */
+	{ 31, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 32 */
+	{ 32, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 33 */
+	{ PARSER_RRTYPE_SRV, T_SRV, "SRV", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_SHORT,
+	    PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_UNCOMPRESSED_DNAME },
+	  true },
+	/* 34 */
+	{ 34, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 35 */
+	{ PARSER_RRTYPE_NAPTR, T_NAPTR, "NAPTR", 6,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 36 */
+	{ PARSER_RRTYPE_KX, T_KX, "KX", 2,
+	  { PARSER_RDATA_WF_SHORT,
+	    PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 37 */
+	{ PARSER_RRTYPE_CERT, T_CERT, "CERT", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_SHORT,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BINARY }, true },
+	/* 38 */
+	{ PARSER_RRTYPE_A6, T_A6, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 39 */
+	{ PARSER_RRTYPE_DNAME, T_DNAME, "DNAME", 1,
+	  { PARSER_RDATA_WF_UNCOMPRESSED_DNAME }, true },
+	/* 40 */
+	{ 40, 0, NULL, 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 41 */
+	/* OPT has its parser token, but should never be in zone file... */
+	{ PARSER_RRTYPE_OPT, T_OPT, "OPT", 1,
+	  { PARSER_RDATA_WF_BINARY }, true },
+	/* 42 */
+	{ PARSER_RRTYPE_APL, T_APL, "APL", PARSER_MAX_RDATA_ITEMS,
+	  { PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL,
+	    PARSER_RDATA_WF_APL, PARSER_RDATA_WF_APL }, false },
+	/* 43 */
+	{ PARSER_RRTYPE_DS, T_DS, "DS", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE,
+	  PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BINARY }, true },
+	/* 44 */
+	{ PARSER_RRTYPE_SSHFP, T_SSHFP, "SSHFP", 3,
+	  { PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BINARY }, true },
+	/* 45 */
+	{ PARSER_RRTYPE_IPSECKEY, T_IPSECKEY, "IPSECKEY", 5,
+	  { PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_IPSECGATEWAY,
+	    PARSER_RDATA_WF_BINARY }, false },
+	/* 46 */
+	{ PARSER_RRTYPE_RRSIG, T_RRSIG, "RRSIG", 9,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_LONG,
+	    PARSER_RDATA_WF_LONG, PARSER_RDATA_WF_LONG,
+	    PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BINARY,
+	    PARSER_RDATA_WF_BINARY }, true },
+	/* 47 */
+	{ PARSER_RRTYPE_NSEC, T_NSEC, "NSEC", 2,
+	  { PARSER_RDATA_WF_BINARY, PARSER_RDATA_WF_BINARY }, true },
+	/* 48 */
+	{ PARSER_RRTYPE_DNSKEY, T_DNSKEY, "DNSKEY", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BINARY }, true },
+	/* 49 */
+	{ PARSER_RRTYPE_DHCID, T_DHCID, "DHCID", 1, { PARSER_RDATA_WF_BINARY }, true },
+	/* 50 */
+	{ PARSER_RRTYPE_NSEC3, T_NSEC3, "NSEC3", 6,
+	  { PARSER_RDATA_WF_BYTE, /* hash type */
+	    PARSER_RDATA_WF_BYTE, /* flags */
+	    PARSER_RDATA_WF_SHORT, /* iterations */
+	    PARSER_RDATA_WF_BINARYWITHLENGTH, /* salt */
+	    PARSER_RDATA_WF_BINARYWITHLENGTH, /* next hashed name */
+	    PARSER_RDATA_WF_BINARY /* type bitmap */ }, true },
+	/* 51 */
+	{ PARSER_RRTYPE_NSEC3PARAM, T_NSEC3PARAM, "NSEC3PARAM", 4,
+	  { PARSER_RDATA_WF_BYTE, /* hash type */
+	    PARSER_RDATA_WF_BYTE, /* flags */
+	    PARSER_RDATA_WF_SHORT, /* iterations */
+	    PARSER_RDATA_WF_BINARYWITHLENGTH /* salt */ }, true },
+	/* 52 */
+
+
+    /* In NSD they have indices between 52 and 99 filled with
+     unknown types. TODO add here if it's really needed? */
+     /* it is indeed needed, in rrtype_from_string */
+
+    /* There's a GNU extension that works like this: [first ... last] = value */
+
+        [53 ... 98] = { PARSER_RRTYPE_TYPEXXX, T_UTYPE, NULL, 1, { PARSER_RDATA_WF_BINARY }},
+
+	/* 99 */
+	[99] = { PARSER_RRTYPE_SPF, T_SPF, "SPF", PARSER_MAX_RDATA_ITEMS,
+	  { PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT,
+	    PARSER_RDATA_WF_TEXT, PARSER_RDATA_WF_TEXT }, false },
+	[100 ... 32768] = { PARSER_RRTYPE_TYPEXXX, T_UTYPE, NULL, 1, { PARSER_RDATA_WF_BINARY }},
+	/* 32769 */
+	[32769] = { PARSER_RRTYPE_DLV, T_DLV, "DLV", 4,
+	  { PARSER_RDATA_WF_SHORT, PARSER_RDATA_WF_BYTE,
+	    PARSER_RDATA_WF_BYTE, PARSER_RDATA_WF_BINARY } },
+};
+
+parser_rrtype_descriptor_t *parser_rrtype_descriptor_by_type(uint16_t type)
+{
+	if (type <= PARSER_RRTYPE_DLV) {
+		return &knot_rrtype_descriptors[type];
+	}
+	return &knot_rrtype_descriptors[0];
+}
+
+/* I see a lot of potential here to speed up zone parsing - this is O(n) *
+ * could be better */
+parser_rrtype_descriptor_t *parser_rrtype_descriptor_by_name(const char *name)
+{
+	if (!name) {
+		return NULL;
+	}
+
+	if (strcasecmp(name, "IN") == 0) {
+		return NULL;
+	}
+
+	if (isdigit((int)name[0])) {
+		return NULL;
+	}
+
+//	/* The most common - A and NS. */
+//	if (strcasecmp(name, "NS") == 0) {
+//		return &knot_rrtype_descriptors[2];
+//	}
+
+//	if (strcasecmp(name, "A") == 0) {
+//		return &knot_rrtype_descriptors[1];
+//	}
+
+//	/* Then RRSIG */
+//	if (strcasecmp(name, "RRSIG") == 0) {
+//		return &knot_rrtype_descriptors[46];
+//	}
+
+//	/* Then DS */
+//	if (strcasecmp(name, "DS") == 0) {
+//		return &knot_rrtype_descriptors[43];
+//	}
+//	/* Then NSEC3 */
+//	if (strcasecmp(name, "NSEC3") == 0) {
+//		return &knot_rrtype_descriptors[50];
+//	}
+//	/* Then NSEC */
+//	if (strcasecmp(name, "NSEC") == 0) {
+//		return &knot_rrtype_descriptors[47];
+//	}
+
+	int i;
+
+	for (i = 0; i < PARSER_RRTYPE_LAST + 1; ++i) {
+		if (knot_rrtype_descriptors[i].name &&
+		    strcasecmp(knot_rrtype_descriptors[i].name, name) == 0) {
+			return &knot_rrtype_descriptors[i];
+		}
+	}
+
+	if (knot_rrtype_descriptors[PARSER_RRTYPE_DLV].name &&
+	    strcasecmp(knot_rrtype_descriptors[PARSER_RRTYPE_DLV].name,
+				      name) == 0) {
+		return &knot_rrtype_descriptors[PARSER_RRTYPE_DLV];
+	}
+
+	return NULL;
+}
+
+const char *parser_rrtype_to_string(uint16_t rrtype)
+{
+	static char buf[20];
+	parser_rrtype_descriptor_t *descriptor =
+		parser_rrtype_descriptor_by_type(rrtype);
+	if (descriptor->name) {
+		return descriptor->name;
+	} else {
+		snprintf(buf, sizeof(buf), "TYPE%d", (int) rrtype);
+		return buf;
+	}
+}
+
+uint16_t parser_rrtype_from_string(const char *name)
+{
+	char *end;
+	long rrtype;
+	parser_rrtype_descriptor_t *entry;
+
+	entry = parser_rrtype_descriptor_by_name(name);
+	if (entry) {
+		return entry->type;
+	}
+
+	if (strlen(name) < 5) {
+		return 0;
+	}
+
+	if (strncasecmp(name, "TYPE", 4) != 0) {
+		return 0;
+	}
+
+	if (!isdigit((int)name[4])) {
+		return 0;
+	}
+
+	/* The rest from the string must be a number.  */
+	rrtype = strtol(name + 4, &end, 10);
+	if (*end != '\0') {
+		return 0;
+	}
+	if (rrtype < 0 || rrtype > 65535L) {
+		return 0;
+	}
+
+	return (uint16_t) rrtype;
+}
+
+const char *parser_rrclass_to_string(uint16_t rrclass)
+{
+	static char buf[20];
+	knot_lookup_table_t *entry = knot_lookup_by_id(dns_rrclasses,
+							   rrclass);
+	if (entry) {
+		assert(strlen(entry->name) < sizeof(buf));
+		knot_strlcpy(buf, entry->name, sizeof(buf));
+	} else {
+		snprintf(buf, sizeof(buf), "CLASS%d", (int) rrclass);
+	}
+	return buf;
+}
+
+uint16_t parser_rrclass_from_string(const char *name)
+{
+	char *end;
+	long rrclass;
+	knot_lookup_table_t *entry;
+
+	entry = knot_lookup_by_name(dns_rrclasses, name);
+	if (entry) {
+		return (uint16_t) entry->id;
+	}
+
+	if (strlen(name) < 6) {
+		return 0;
+	}
+
+	if (strncasecmp(name, "CLASS", 5) != 0) {
+		return 0;
+	}
+
+	if (!isdigit((int)name[5])) {
+		return 0;
+	}
+
+	// The rest from the string must be a number.
+	rrclass = strtol(name + 5, &end, 10);
+	if (*end != '\0') {
+		return 0;
+	}
+	if (rrclass < 0 || rrclass > 65535L) {
+		return 0;
+	}
+
+	return (uint16_t) rrclass;
+}
+
diff --git a/src/zcompile/parser-descriptor.h b/src/zcompile/parser-descriptor.h
new file mode 100644
index 0000000..c7865dd
--- /dev/null
+++ b/src/zcompile/parser-descriptor.h
@@ -0,0 +1,278 @@
+/*!
+ * \file parser-descriptor.h
+ *
+ * \author Modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         most of the work by NLnet Labs.
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief Contains resource record descriptor and its API
+ * 
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _KNOTD_PARSER_DESCRIPTOR_H_
+#define _KNOTD_PARSER_DESCRIPTOR_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "libknot/util/utils.h"
+
+enum parser_mxrdtln {
+	PARSER_MAX_RDATA_ITEMS = 64,
+	PARSER_MAX_RDATA_ITEM_SIZE = 255,
+	PARSER_MAX_RDATA_WIRE_SIZE =
+	PARSER_MAX_RDATA_ITEMS * PARSER_MAX_RDATA_ITEM_SIZE
+};
+//#define MAXRDATALEN 64
+
+/* 64 is in NSD. Seems a little too much, but I'd say it's not a real issue. */
+
+/*!
+ * \brief Enum containing RR class codes.
+ */
+enum parser_rr_class {
+	PARSER_CLASS_IN = 1,
+	PARSER_CLASS_CS,
+	PARSER_CLASS_CH,
+	PARSER_CLASS_HS,
+	PARSER_CLASS_NONE = 254,
+	PARSER_CLASS_ANY = 255
+};
+
+typedef enum parser_rr_class parser_rr_class_t;
+
+enum parser_rr_type {
+	PARSER_RRTYPE_UNKNOWN, /*!< 0 - an unknown type */
+	PARSER_RRTYPE_A, /*!< 1 - a host address */
+	PARSER_RRTYPE_NS, /*!< 2 - an authoritative name server */
+	PARSER_RRTYPE_MD, /*!< 3 - a mail destination (Obsolete - use MX) */
+	PARSER_RRTYPE_MF, /*!< 4 - a mail forwarder (Obsolete - use MX) */
+	PARSER_RRTYPE_CNAME, /*!< 5 - the canonical name for an alias */
+	PARSER_RRTYPE_SOA, /*!< 6 - marks the start of a zone of authority */
+	PARSER_RRTYPE_MB, /*!< 7 - a mailbox domain name (EXPERIMENTAL) */
+	PARSER_RRTYPE_MG, /*!< 8 - a mail group member (EXPERIMENTAL) */
+	PARSER_RRTYPE_MR, /*!< 9 - a mail rename domain name (EXPERIMENTAL) */
+	PARSER_RRTYPE_NULL, /*!< 10 - a null RR (EXPERIMENTAL) */
+	PARSER_RRTYPE_WKS, /*!< 11 - a well known service description */
+	PARSER_RRTYPE_PTR, /*!< 12 - a domain name pointer */
+	PARSER_RRTYPE_HINFO, /*!< 13 - host information */
+	PARSER_RRTYPE_MINFO, /*!< 14 - mailbox or mail list information */
+	PARSER_RRTYPE_MX, /*!< 15 - mail exchange */
+	PARSER_RRTYPE_TXT, /*!< 16 - text strings */
+	PARSER_RRTYPE_RP, /*!< 17 - RFC1183 */
+	PARSER_RRTYPE_AFSDB, /*!< 18 - RFC1183 */
+	PARSER_RRTYPE_X25, /*!< 19 - RFC1183 */
+	PARSER_RRTYPE_ISDN, /*!< 20 - RFC1183 */
+	PARSER_RRTYPE_RT, /*!< 21 - RFC1183 */
+	PARSER_RRTYPE_NSAP, /*!< 22 - RFC1706 */
+
+	PARSER_RRTYPE_SIG = 24, /*!< 24 - 2535typecode */
+	PARSER_RRTYPE_KEY, /*!< 25 - 2535typecode */
+	PARSER_RRTYPE_PX, /*!< 26 - RFC2163 */
+
+	PARSER_RRTYPE_AAAA = 28, /*!< 28 - ipv6 address */
+	PARSER_RRTYPE_LOC, /*!< 29 - LOC record  RFC1876 */
+	PARSER_RRTYPE_NXT, /*!< 30 - 2535typecode */
+
+	PARSER_RRTYPE_SRV = 33, /*!< 33 - SRV record RFC2782 */
+
+	PARSER_RRTYPE_NAPTR = 35, /*!< 35 - RFC2915 */
+	PARSER_RRTYPE_KX, /*!< 36 - RFC2230 Key Exchange Delegation Record */
+	PARSER_RRTYPE_CERT, /*!< 37 - RFC2538 */
+	PARSER_RRTYPE_A6, /*!< 38 - RFC2874 */
+	PARSER_RRTYPE_DNAME, /*!< 39 - RFC2672 */
+
+	PARSER_RRTYPE_OPT = 41, /*!< 41 - Pseudo OPT record... */
+	PARSER_RRTYPE_APL, /*!< 42 - RFC3123 */
+	PARSER_RRTYPE_DS, /*!< 43 - RFC 4033, 4034, and 4035 */
+	PARSER_RRTYPE_SSHFP, /*!< 44 - SSH Key Fingerprint */
+	PARSER_RRTYPE_IPSECKEY, /*!< 45 - public key for ipsec use. RFC 4025 */
+	PARSER_RRTYPE_RRSIG, /*!< 46 - RFC 4033, 4034, and 4035 */
+	PARSER_RRTYPE_NSEC, /*!< 47 - RFC 4033, 4034, and 4035 */
+	PARSER_RRTYPE_DNSKEY, /*!< 48 - RFC 4033, 4034, and 4035 */
+	PARSER_RRTYPE_DHCID, /*!< 49 - RFC4701 DHCP information */
+	/*!
+	 * \brief 50 - NSEC3, secure denial, prevents zonewalking
+	 */
+	PARSER_RRTYPE_NSEC3,
+	/*!
+	 * \brief  51 - NSEC3PARAM at zone apex nsec3 parameters
+	 */
+	PARSER_RRTYPE_NSEC3PARAM, 
+
+	/* TODO consider some better way of doing this, indices too high */
+
+	PARSER_RRTYPE_SPF = 99,      /*!< RFC 4408 */
+
+	// not designating any RRs
+	PARSER_RRTYPE_TSIG = 250,
+	PARSER_RRTYPE_IXFR = 251,
+	PARSER_RRTYPE_AXFR = 252,
+	/*!
+	 * \brief A request for mailbox-related records (MB, MG or MR)
+	 */
+	PARSER_RRTYPE_MAILB = 253,
+	/*!
+	 * \brief A request for mail agent RRs (Obsolete - see MX)
+	 */
+	PARSER_RRTYPE_MAILA = 254,
+	PARSER_RRTYPE_ANY = 255, /*!< any type (wildcard) */
+
+	// totally weird numbers (cannot use for indexing)
+	PARSER_RRTYPE_TA = 32768, /*!< DNSSEC Trust Authorities */
+	PARSER_RRTYPE_DLV = 32769, /*!< RFC 4431 */
+	PARSER_RRTYPE_TYPEXXX = 32770
+};
+
+/*!
+ * \brief Enum containing RR type codes.
+ *
+ * \todo Not all indices can be used for indexing.
+ */
+typedef enum parser_rr_type parser_rr_type_t;
+
+static uint const PARSER_RRTYPE_LAST = PARSER_RRTYPE_NSEC3PARAM;
+
+enum parser_rdata_wireformat {
+	/*!
+	 * \brief Possibly compressed domain name.
+	 */	
+	PARSER_RDATA_WF_COMPRESSED_DNAME = 50,
+	PARSER_RDATA_WF_UNCOMPRESSED_DNAME = 51, /*!< Uncompressed domain name.  */
+	PARSER_RDATA_WF_LITERAL_DNAME = 52, /*!< Literal (not downcased) dname.  */
+	PARSER_RDATA_WF_BYTE = 1, /*!< 8-bit integer.  */
+	PARSER_RDATA_WF_SHORT = 2, /*!< 16-bit integer.  */
+	PARSER_RDATA_WF_LONG = 4, /*!< 32-bit integer.  */
+	PARSER_RDATA_WF_TEXT = 53, /*!< Text string.  */
+	PARSER_RDATA_WF_A = 58, /*!< 32-bit IPv4 address.  */
+	PARSER_RDATA_WF_AAAA = 16, /*!< 128-bit IPv6 address.  */
+	PARSER_RDATA_WF_BINARY = 54, /*!< Binary data (unknown length).  */
+	/*!
+	 * \brief Binary data preceded by 1 byte length 
+	 */
+	PARSER_RDATA_WF_BINARYWITHLENGTH = 55,
+	PARSER_RDATA_WF_APL = 56, /*!< APL data.  */
+	PARSER_RDATA_WF_IPSECGATEWAY = 57 /*!< IPSECKEY gateway ip4, ip6 or dname. */
+};
+
+/*!
+ * \brief Enum containing wireformat codes. Taken from NSD's "dns.h"
+ */
+typedef enum parser_rdatawireformat parser_rdata_wireformat_t;
+
+struct parser_rrtype_descriptor {
+	uint16_t type;	/*!< RR type */
+	int token; /*< Token used in zoneparser */
+	const char *name;	/*!< Textual name.  */
+	uint8_t length;	/*!< Maximum number of RDATA items.  */
+	/*!
+	 * \brief rdata_wireformat_type
+	 */
+	uint8_t wireformat[PARSER_MAX_RDATA_ITEMS]; 
+	bool fixed_items; /*!< Has fixed number of RDATA items? */
+};
+
+/*!
+ * \brief Structure holding RR descriptor
+ */
+typedef struct parser_rrtype_descriptor parser_rrtype_descriptor_t;
+
+/*!
+ * \brief Gets RR descriptor for given RR type.
+ *
+ * \param type Code of RR type whose descriptor should be returned.
+ *
+ * \return RR descriptor for given type code, NULL descriptor if
+ *         unknown type.
+ *
+ * \todo Change return value to const.
+ */
+parser_rrtype_descriptor_t *parser_rrtype_descriptor_by_type(uint16_t type);
+
+/*!
+ * \brief Gets RR descriptor for given RR name.
+ *
+ * \param name Mnemonic of RR type whose descriptor should be returned.
+ *
+ * \return RR descriptor for given name, NULL descriptor if
+ *         unknown type.
+ *
+ * \todo Change return value to const.
+ */
+parser_rrtype_descriptor_t *parser_rrtype_descriptor_by_name(const char *name);
+
+/*!
+ * \brief Converts numeric type representation to mnemonic string.
+ *
+ * \param rrtype Type RR type code to be converted.
+ *
+ * \return Mnemonic string if found, str(TYPE[rrtype]) otherwise.
+ */
+const char *parser_rrtype_to_string(uint16_t rrtype);
+
+/*!
+ * \brief Converts mnemonic string representation of a type to numeric one.
+ *
+ * \param name Mnemonic string to be converted.
+ *
+ * \return Correct code if found, 0 otherwise.
+ */
+uint16_t parser_rrtype_from_string(const char *name);
+
+/*!
+ * \brief Converts numeric class representation to string one.
+ *
+ * \param rrclass Class code to be converted.
+ *
+ * \return String represenation of class if found,
+ *         str(CLASS[rrclass]) otherwise.
+ */
+const char *parser_rrclass_to_string(uint16_t rrclass);
+
+/*!
+ * \brief Converts string representation of a class to numeric one.
+ *
+ * \param name Class string to be converted.
+ *
+ * \return Correct code if found, 0 otherwise.
+ */
+uint16_t parser_rrclass_from_string(const char *name);
+
+#endif /* _KNOTD_PARSER_DESCRIPTOR_H_ */
+
+/*! @} */
diff --git a/src/zcompile/parser-util.c b/src/zcompile/parser-util.c
new file mode 100644
index 0000000..e7733ef
--- /dev/null
+++ b/src/zcompile/parser-util.c
@@ -0,0 +1,2435 @@
+/*!
+ * \file parser-util.c
+ *
+ * \author NLnet Labs
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief utility functions for zone parser.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+//#include "common.h"
+#include "common/base32hex.h"
+#include "zcompile/parser-util.h"
+#include "zcompile/zcompile.h"
+#include "libknot/util/descriptor.h"
+#include "libknot/util/utils.h"
+#include "zcompile/zcompile-error.h"
+
+#define IP6ADDRLEN	(128/8)
+#define	NS_INT16SZ	2
+#define NS_INADDRSZ 4
+#define NS_IN6ADDRSZ 16
+#define APL_NEGATION_MASK      0x80U
+
+/* int
+ * inet_pton(af, src, dst)
+ *	convert from presentation format (which usually means ASCII printable)
+ *	to network format (which is usually some kind of binary format).
+ * return:
+ *	1 if the address was valid for the specified address family
+ *	0 if the address wasn't valid (`dst' is untouched in this case)
+ *	-1 if some other error occurred (`dst' is untouched in this case, too)
+ * author:
+ *	Paul Vixie, 1996.
+ */
+int inet_pton(int af, const char *src, void *dst)
+{
+	switch (af) {
+	case AF_INET:
+		return (inet_pton4(src, dst));
+	case AF_INET6:
+		return (inet_pton6(src, dst));
+	default:
+		errno = EAFNOSUPPORT;
+		return (-1);
+	}
+	/* NOTREACHED */
+}
+
+//int my_b32_pton(const char *src, uint8_t *target, size_t tsize)
+//{
+//	char ch;
+//	size_t p = 0;
+
+//	memset(target, '\0', tsize);
+//	while ((ch = *src++)) {
+//		uint8_t d;
+//		size_t b;
+//		size_t n;
+
+//		if (p + 5 >= tsize * 8) {
+//			return -1;
+//		}
+
+//		if (isspace(ch)) {
+//			continue;
+//		}
+
+//		if (ch >= '0' && ch <= '9') {
+//			d = ch - '0';
+//		} else if (ch >= 'A' && ch <= 'V') {
+//			d = ch - 'A' + 10;
+//		} else if (ch >= 'a' && ch <= 'v') {
+//			d = ch - 'a' + 10;
+//		} else {
+//			return -1;
+//		}
+
+//		b = 7 - p % 8;
+//		n = p / 8;
+
+//		if (b >= 4) {
+//			target[n] |= d << (b - 4);
+//		} else {
+//			target[n] |= d >> (4 - b);
+//			target[n+1] |= d << (b + 4);
+//		}
+//		p += 5;
+//	}
+//	return (p + 7) / 8;
+//}
+
+
+#define Assert(Cond) if (!(Cond)) abort()
+
+static const char Base64[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char Pad64 = '=';
+
+/* int
+ * inet_pton4(src, dst)
+ *	like inet_aton() but without all the hexadecimal and shorthand.
+ * return:
+ *	1 if `src' is a valid dotted quad, else 0.
+ * notice:
+ *	does not touch `dst' unless it's returning 1.
+ * author:
+ *	Paul Vixie, 1996.
+ */
+int inet_pton4(const char *src, uint8_t *dst)
+{
+	static const char digits[] = "0123456789";
+	int saw_digit, octets, ch;
+	uint8_t tmp[NS_INADDRSZ], *tp;
+
+	saw_digit = 0;
+	octets = 0;
+	*(tp = tmp) = 0;
+	while ((ch = *src++) != '\0') {
+		const char *pch;
+
+		if ((pch = strchr(digits, ch)) != NULL) {
+			uint32_t new = *tp * 10 + (pch - digits);
+
+			if (new > 255) {
+				return (0);
+			}
+			*tp = new;
+			if (! saw_digit) {
+				if (++octets > 4) {
+					return (0);
+				}
+				saw_digit = 1;
+			}
+		} else if (ch == '.' && saw_digit) {
+			if (octets == 4) {
+				return (0);
+			}
+			*++tp = 0;
+			saw_digit = 0;
+		} else {
+			return (0);
+		}
+	}
+	if (octets < 4) {
+		return (0);
+	}
+
+	memcpy(dst, tmp, NS_INADDRSZ);
+	return (1);
+}
+
+/* int
+ * inet_pton6(src, dst)
+ *	convert presentation level address to network order binary form.
+ * return:
+ *	1 if `src' is a valid [RFC1884 2.2] address, else 0.
+ * notice:
+ *	(1) does not touch `dst' unless it's returning 1.
+ *	(2) :: in a full address is silently ignored.
+ * credit:
+ *	inspired by Mark Andrews.
+ * author:
+ *	Paul Vixie, 1996.
+ */
+int inet_pton6(const char *src, uint8_t *dst)
+{
+	static const char xdigits_l[] = "0123456789abcdef",
+					xdigits_u[] = "0123456789ABCDEF";
+	uint8_t tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+	const char *xdigits, *curtok;
+	int ch, saw_xdigit;
+	uint32_t val;
+
+	memset((tp = tmp), '\0', NS_IN6ADDRSZ);
+	endp = tp + NS_IN6ADDRSZ;
+	colonp = NULL;
+	/* Leading :: requires some special handling. */
+	if (*src == ':')
+		if (*++src != ':') {
+			return (0);
+		}
+	curtok = src;
+	saw_xdigit = 0;
+	val = 0;
+	while ((ch = *src++) != '\0') {
+		const char *pch;
+
+		if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL) {
+			pch = strchr((xdigits = xdigits_u), ch);
+		}
+		if (pch != NULL) {
+			val <<= 4;
+			val |= (pch - xdigits);
+			if (val > 0xffff) {
+				return (0);
+			}
+			saw_xdigit = 1;
+			continue;
+		}
+		if (ch == ':') {
+			curtok = src;
+			if (!saw_xdigit) {
+				if (colonp) {
+					return (0);
+				}
+				colonp = tp;
+				continue;
+			}
+			if (tp + NS_INT16SZ > endp) {
+				return (0);
+			}
+			*tp++ = (uint8_t)(val >> 8) & 0xff;
+			*tp++ = (uint8_t) val & 0xff;
+			saw_xdigit = 0;
+			val = 0;
+			continue;
+		}
+		if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+				inet_pton4(curtok, tp) > 0) {
+			tp += NS_INADDRSZ;
+			saw_xdigit = 0;
+			break;	/* '\0' was seen by inet_pton4(). */
+		}
+		return (0);
+	}
+	if (saw_xdigit) {
+		if (tp + NS_INT16SZ > endp) {
+			return (0);
+		}
+		*tp++ = (uint8_t)(val >> 8) & 0xff;
+		*tp++ = (uint8_t) val & 0xff;
+	}
+	if (colonp != NULL) {
+		/*
+		 * Since some memmove()'s erroneously fail to handle
+		 * overlapping regions, we'll do the shift by hand.
+		 */
+		const int n = tp - colonp;
+		int i;
+
+		for (i = 1; i <= n; i++) {
+			endp[- i] = colonp[n - i];
+			colonp[n - i] = 0;
+		}
+		tp = endp;
+	}
+	if (tp != endp) {
+		return (0);
+	}
+	memcpy(dst, tmp, NS_IN6ADDRSZ);
+	return (1);
+}
+
+
+#ifndef IN6ADDRSZ
+#define IN6ADDRSZ   16   /* IPv6 T_AAAA */
+#endif
+
+#ifndef INT16SZ
+#define INT16SZ     2    /* for systems without 16-bit ints */
+#endif
+
+/*
+ * WARNING: Don't even consider trying to compile this on a system where
+ * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
+ */
+
+
+/* char *
+ * inet_ntop(af, src, dst, size)
+ *	convert a network format address to presentation format.
+ * return:
+ *	pointer to presentation format address (`dst'), or NULL (see errno).
+ * author:
+ *	Paul Vixie, 1996.
+ */
+//const char *inet_ntop(int af, const void *src, char *dst, size_t size)
+//{
+//	switch (af) {
+//	case AF_INET:
+//		return (inet_ntop4(src, dst, size));
+//	case AF_INET6:
+//		return (inet_ntop6(src, dst, size));
+//	default:
+//		errno = EAFNOSUPPORT;
+//		return (NULL);
+//	}
+//	/* NOTREACHED */
+//}
+
+/* const char *
+ * inet_ntop4(src, dst, size)
+ *	format an IPv4 address, more or less like inet_ntoa()
+ * return:
+ *	`dst' (as a const)
+ * notes:
+ *	(1) uses no statics
+ *	(2) takes a u_char* not an in_addr as input
+ * author:
+ *	Paul Vixie, 1996.
+ */
+const char *inet_ntop4(const u_char *src, char *dst, size_t size)
+{
+	static const char fmt[] = "%u.%u.%u.%u";
+	char tmp[sizeof "255.255.255.255"];
+	int l;
+
+	l = snprintf(tmp, size, fmt, src[0], src[1], src[2], src[3]);
+	if (l <= 0 || l >= (int)size) {
+		errno = ENOSPC;
+		return (NULL);
+	}
+	knot_strlcpy(dst, tmp, size);
+	return (dst);
+}
+
+/* const char *
+ * inet_ntop6(src, dst, size)
+ *	convert IPv6 binary address into presentation (printable) format
+ * author:
+ *	Paul Vixie, 1996.
+ */
+const char *inet_ntop6(const u_char *src, char *dst, size_t size)
+{
+	/*
+	 * Note that int32_t and int16_t need only be "at least" large enough
+	 * to contain a value of the specified size.  On some systems, like
+	 * Crays, there is no such thing as an integer variable with 16 bits.
+	 * Keep this in mind if you think this function should have been coded
+	 * to use pointer overlays.  All the world's not a VAX.
+	 */
+	char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"];
+	char *tp, *ep;
+	struct {
+		int base, len;
+	} best, cur;
+	best.base = cur.base =-1;
+	best.len = cur.len = 0;
+	u_int words[IN6ADDRSZ / INT16SZ];
+	int i;
+	int advance;
+
+	/*
+	 * Preprocess:
+	 *	Copy the input (bytewise) array into a wordwise array.
+	 *	Find the longest run of 0x00's in src[] for :: shorthanding.
+	 */
+	memset(words, '\0', sizeof words);
+	for (i = 0; i < IN6ADDRSZ; i++) {
+		words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
+	}
+
+	for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
+		if (words[i] == 0) {
+			if (cur.base == -1) {
+				cur.base = i, cur.len = 1;
+			} else {
+				cur.len++;
+			}
+		} else {
+			if (cur.base != -1) {
+				if (best.base == -1 || cur.len > best.len) {
+					best = cur;
+				}
+				cur.base = -1;
+			}
+		}
+	}
+	if (cur.base != -1) {
+		if (best.base == -1 || cur.len > best.len) {
+			best = cur;
+		}
+	}
+	if (best.base != -1 && best.len < 2) {
+		best.base = -1;
+	}
+
+	/*
+	 * Format the result.
+	 */
+	tp = tmp;
+	ep = tmp + sizeof(tmp);
+	for (i = 0; i < (IN6ADDRSZ / INT16SZ) && tp < ep; i++) {
+		/* Are we inside the best run of 0x00's? */
+		if (best.base != -1 && i >= best.base &&
+				i < (best.base + best.len)) {
+			if (i == best.base) {
+				if (tp + 1 >= ep) {
+					return (NULL);
+				}
+				*tp++ = ':';
+			}
+			continue;
+		}
+		/* Are we following an initial run of 0x00s or any real hex? */
+		if (i != 0) {
+			if (tp + 1 >= ep) {
+				return (NULL);
+			}
+			*tp++ = ':';
+		}
+		/* Is this address an encapsulated IPv4? */
+		if (i == 6 && best.base == 0 &&
+				(best.len == 6 ||
+				(best.len == 5 && words[5] == 0xffff))) {
+			if (!inet_ntop4(src + 12, tp, (size_t)(ep - tp))) {
+				return (NULL);
+			}
+			tp += strlen(tp);
+			break;
+		}
+		advance = snprintf(tp, ep - tp, "%x", words[i]);
+		if (advance <= 0 || advance >= ep - tp) {
+			return (NULL);
+		}
+		tp += advance;
+	}
+	/* Was it a trailing run of 0x00's? */
+	if (best.base != -1 && (best.base + best.len) ==
+	   (IN6ADDRSZ / INT16SZ)) {
+		if (tp + 1 >= ep) {
+			return (NULL);
+		}
+		*tp++ = ':';
+	}
+	if (tp + 1 >= ep) {
+		return (NULL);
+	}
+	*tp++ = '\0';
+
+	/*
+	 * Check for overflow, copy, and we're done.
+	 */
+	if ((size_t)(tp - tmp) > size) {
+		errno = ENOSPC;
+		return (NULL);
+	}
+	knot_strlcpy(dst, tmp, size);
+	return (dst);
+}
+
+
+static int b64rmap_initialized = 0;
+static uint8_t b64rmap[256];
+
+static const uint8_t b64rmap_special = 0xf0;
+static const uint8_t b64rmap_end = 0xfd;
+static const uint8_t b64rmap_space = 0xfe;
+static const uint8_t b64rmap_invalid = 0xff;
+
+/**
+ * Initializing the reverse map is not thread safe.
+ * Which is fine for NSD. For now...
+ **/
+void b64_initialize_rmap()
+{
+	int i;
+	char ch;
+
+	/* Null: end of string, stop parsing */
+	b64rmap[0] = b64rmap_end;
+
+	for (i = 1; i < 256; ++i) {
+		ch = (char)i;
+		/* Whitespaces */
+		if (isspace(ch)) {
+			b64rmap[i] = b64rmap_space;
+		}
+		/* Padding: stop parsing */
+		else if (ch == Pad64) {
+			b64rmap[i] = b64rmap_end;
+		}
+		/* Non-base64 char */
+		else {
+			b64rmap[i] = b64rmap_invalid;
+		}
+	}
+
+	/* Fill reverse mapping for base64 chars */
+	for (i = 0; Base64[i] != '\0'; ++i) {
+		b64rmap[(uint8_t)Base64[i]] = i;
+	}
+
+	b64rmap_initialized = 1;
+}
+
+int b64_pton_do(char const *src, uint8_t *target, size_t targsize)
+{
+	int tarindex, state, ch;
+	uint8_t ofs;
+
+	state = 0;
+	tarindex = 0;
+
+	while (1) {
+		ch = *src++;
+		ofs = b64rmap[ch];
+
+		if (ofs >= b64rmap_special) {
+			/* Ignore whitespaces */
+			if (ofs == b64rmap_space) {
+				continue;
+			}
+			/* End of base64 characters */
+			if (ofs == b64rmap_end) {
+				break;
+			}
+			/* A non-base64 character. */
+			return (-1);
+		}
+
+		switch (state) {
+		case 0:
+			if ((size_t)tarindex >= targsize) {
+				return (-1);
+			}
+			target[tarindex] = ofs << 2;
+			state = 1;
+			break;
+		case 1:
+			if ((size_t)tarindex + 1 >= targsize) {
+				return (-1);
+			}
+			target[tarindex]   |=  ofs >> 4;
+			target[tarindex+1]  = (ofs & 0x0f)
+					      << 4 ;
+			tarindex++;
+			state = 2;
+			break;
+		case 2:
+			if ((size_t)tarindex + 1 >= targsize) {
+				return (-1);
+			}
+			target[tarindex]   |=  ofs >> 2;
+			target[tarindex+1]  = (ofs & 0x03)
+					      << 6;
+			tarindex++;
+			state = 3;
+			break;
+		case 3:
+			if ((size_t)tarindex >= targsize) {
+				return (-1);
+			}
+			target[tarindex] |= ofs;
+			tarindex++;
+			state = 0;
+			break;
+		default:
+			abort();
+		}
+	}
+
+	/*
+	 * We are done decoding Base-64 chars.  Let's see if we ended
+	 * on a byte boundary, and/or with erroneous trailing characters.
+	 */
+
+	if (ch == Pad64) {		/* We got a pad char. */
+		ch = *src++;		/* Skip it, get next. */
+		switch (state) {
+		case 0:		/* Invalid = in first position */
+		case 1:		/* Invalid = in second position */
+			return (-1);
+
+		case 2:		/* Valid, means one byte of info */
+			/* Skip any number of spaces. */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					break;
+				}
+			/* Make sure there is another trailing = sign. */
+			if (ch != Pad64) {
+				return (-1);
+			}
+			ch = *src++;		/* Skip the = */
+			/* Fall through to "single trailing =" case. */
+			/* FALLTHROUGH */
+
+		case 3:		/* Valid, means two bytes of info */
+			/*
+			 * We know this char is an =.  Is there anything but
+			 * whitespace after it?
+			 */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					return (-1);
+				}
+
+			/*
+			 * Now make sure for cases 2 and 3 that the "extra"
+			 * bits that slopped past the last full byte were
+			 * zeros.  If we don't check them, they become a
+			 * subliminal channel.
+			 */
+			if (target[tarindex] != 0) {
+				return (-1);
+			}
+		}
+	} else {
+		/*
+		 * We ended by seeing the end of the string.  Make sure we
+		 * have no partial bytes lying around.
+		 */
+		if (state != 0) {
+			return (-1);
+		}
+	}
+
+	return (tarindex);
+}
+
+
+int b64_pton_len(char const *src)
+{
+	int tarindex, state, ch;
+	uint8_t ofs;
+
+	state = 0;
+	tarindex = 0;
+
+	while (1) {
+		ch = *src++;
+		ofs = b64rmap[ch];
+
+		if (ofs >= b64rmap_special) {
+			/* Ignore whitespaces */
+			if (ofs == b64rmap_space) {
+				continue;
+			}
+			/* End of base64 characters */
+			if (ofs == b64rmap_end) {
+				break;
+			}
+			/* A non-base64 character. */
+			return (-1);
+		}
+
+		switch (state) {
+		case 0:
+			state = 1;
+			break;
+		case 1:
+			tarindex++;
+			state = 2;
+			break;
+		case 2:
+			tarindex++;
+			state = 3;
+			break;
+		case 3:
+			tarindex++;
+			state = 0;
+			break;
+		default:
+			abort();
+		}
+	}
+
+	/*
+	 * We are done decoding Base-64 chars.  Let's see if we ended
+	 * on a byte boundary, and/or with erroneous trailing characters.
+	 */
+
+	if (ch == Pad64) {		/* We got a pad char. */
+		ch = *src++;		/* Skip it, get next. */
+		switch (state) {
+		case 0:		/* Invalid = in first position */
+		case 1:		/* Invalid = in second position */
+			return (-1);
+
+		case 2:		/* Valid, means one byte of info */
+			/* Skip any number of spaces. */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					break;
+				}
+			/* Make sure there is another trailing = sign. */
+			if (ch != Pad64) {
+				return (-1);
+			}
+			ch = *src++;		/* Skip the = */
+			/* Fall through to "single trailing =" case. */
+			/* FALLTHROUGH */
+
+		case 3:		/* Valid, means two bytes of info */
+			/*
+			 * We know this char is an =.  Is there anything but
+			 * whitespace after it?
+			 */
+			for ((void)NULL; ch != '\0'; ch = *src++)
+				if (b64rmap[ch] != b64rmap_space) {
+					return (-1);
+				}
+
+		}
+	} else {
+		/*
+		 * We ended by seeing the end of the string.  Make sure we
+		 * have no partial bytes lying around.
+		 */
+		if (state != 0) {
+			return (-1);
+		}
+	}
+
+	return (tarindex);
+}
+
+int b64_pton(char const *src, uint8_t *target, size_t targsize)
+{
+	if (!b64rmap_initialized) {
+		b64_initialize_rmap();
+	}
+
+	if (target) {
+		return b64_pton_do(src, target, targsize);
+	} else {
+		return b64_pton_len(src);
+	}
+}
+
+void set_bit(uint8_t bits[], size_t index)
+{
+	/*
+	 * The bits are counted from left to right, so bit #0 is the
+	 * left most bit.
+	 */
+	bits[index / 8] |= (1 << (7 - index % 8));
+}
+
+uint32_t strtoserial(const char *nptr, const char **endptr)
+{
+	uint32_t i = 0;
+	uint32_t serial = 0;
+
+	for (*endptr = nptr; **endptr; (*endptr)++) {
+		switch (**endptr) {
+		case ' ':
+		case '\t':
+			break;
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+		case '8':
+		case '9':
+			i *= 10;
+			i += (**endptr - '0');
+			break;
+		default:
+			break;
+		}
+	}
+	serial += i;
+	return serial;
+}
+
+inline void write_uint32(void *dst, uint32_t data)
+{
+#ifdef ALLOW_UNALIGNED_ACCESSES
+	*(uint32_t *) dst = htonl(data);
+#else
+	uint8_t *p = (uint8_t *) dst;
+	p[0] = (uint8_t)((data >> 24) & 0xff);
+	p[1] = (uint8_t)((data >> 16) & 0xff);
+	p[2] = (uint8_t)((data >> 8) & 0xff);
+	p[3] = (uint8_t)(data & 0xff);
+#endif
+}
+
+uint32_t strtottl(const char *nptr, const char **endptr)
+{
+	uint32_t i = 0;
+	uint32_t seconds = 0;
+
+	for (*endptr = nptr; **endptr; (*endptr)++) {
+		switch (**endptr) {
+		case ' ':
+		case '\t':
+			break;
+		case 's':
+		case 'S':
+			seconds += i;
+			i = 0;
+			break;
+		case 'm':
+		case 'M':
+			seconds += i * 60;
+			i = 0;
+			break;
+		case 'h':
+		case 'H':
+			seconds += i * 60 * 60;
+			i = 0;
+			break;
+		case 'd':
+		case 'D':
+			seconds += i * 60 * 60 * 24;
+			i = 0;
+			break;
+		case 'w':
+		case 'W':
+			seconds += i * 60 * 60 * 24 * 7;
+			i = 0;
+			break;
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+		case '8':
+		case '9':
+			i *= 10;
+			i += (**endptr - '0');
+			break;
+		default:
+			seconds += i;
+			return seconds;
+		}
+	}
+	seconds += i;
+	return seconds;
+}
+
+/* Number of days per month (except for February in leap years). */
+static const int mdays[] = {
+    31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+};
+
+static int is_leap_year(int year)
+{
+    return year % 4 == 0 && (year % 100 != 0 || year % 400 == 0);
+}
+
+static int leap_days(int y1, int y2)
+{
+    --y1;
+    --y2;
+    return (y2/4 - y1/4) - (y2/100 - y1/100) + (y2/400 - y1/400);
+}
+
+/*
+ * Code adapted from Python 2.4.1 sources (Lib/calendar.py).
+ */
+time_t mktime_from_utc(const struct tm *tm)
+{
+    int year = 1900 + tm->tm_year;
+    time_t days = 365 * (year - 1970) + leap_days(1970, year);
+    time_t hours;
+    time_t minutes;
+    time_t seconds;
+    int i;
+
+    for (i = 0; i < tm->tm_mon; ++i) {
+	days += mdays[i];
+    }
+    if (tm->tm_mon > 1 && is_leap_year(year)) {
+	++days;
+    }
+    days += tm->tm_mday - 1;
+
+    hours = days * 24 + tm->tm_hour;
+    minutes = hours * 60 + tm->tm_min;
+    seconds = minutes * 60 + tm->tm_sec;
+
+    return seconds;
+}
+
+/*!< Following functions are conversions from text to wire. */
+
+//#define DEBUG_UNKNOWN_RDATA
+
+#ifdef DEBUG_UNKNOWN_RDATA
+#define dbg_rdata(msg...) fprintf(stderr, msg)
+#define DBG_RDATA(cmds) do { cmds } while (0)
+#else
+#define dbg_rdata(msg...)
+#define DBG_RDATA(cmds)
+#endif
+
+
+
+#define IP6ADDRLEN	(128/8)
+#define	NS_INT16SZ	2
+#define NS_INADDRSZ 4
+#define NS_IN6ADDRSZ 16
+#define APL_NEGATION_MASK      0x80U
+#define APL_LENGTH_MASK	       (~APL_NEGATION_MASK)
+
+//#define ZP_DEBUG
+
+#ifdef ZP_DEBUG
+#define dbg_zp(msg...) fprintf(stderr, msg)
+#else
+#define dbg_zp(msg...)
+#endif
+
+
+/*!
+ * \brief Return data of raw data item.
+ *
+ * \param item Item.
+ * \return uint16_t * Raw data.
+ */
+static inline uint16_t * rdata_atom_data(knot_rdata_item_t item)
+{
+	return (uint16_t *)(item.raw_data + 1);
+}
+
+/*!
+ * \brief Return type of RRSet covered by given RRSIG.
+ *
+ * \param rrset RRSIG.
+ * \return uint16_t Type covered.
+ */
+uint16_t rrsig_type_covered(knot_rrset_t *rrset)
+{
+	assert(rrset->rdata->items[0].raw_data[0] == sizeof(uint16_t));
+
+	return ntohs(*(uint16_t *) rdata_atom_data(rrset->rdata->items[0]));
+}
+
+/*!
+ * \brief Checks if item contains domain.
+ *
+ * \param type Type of RRSet.
+ * \param index Index to check.
+ *
+ * \return > 1 if item is domain, 0 otherwise.
+ */
+static inline int rdata_atom_is_domain(uint16_t type, size_t index)
+{
+	const knot_rrtype_descriptor_t *descriptor
+	= knot_rrtype_descriptor_by_type(type);
+	return (index < descriptor->length
+		&& (descriptor->wireformat[index] ==
+		KNOT_RDATA_WF_COMPRESSED_DNAME  ||
+		descriptor->wireformat[index] ==
+		KNOT_RDATA_WF_UNCOMPRESSED_DNAME));
+}
+
+/*!
+ * \brief Returns which wireformat type is on given index.
+ *
+ * \param type Type of RRSet.
+ * \param index Index.
+ *
+ * \return uint8_t Wireformat type.
+ */
+static inline uint8_t rdata_atom_wireformat_type(uint16_t type, size_t index)
+{
+	const knot_rrtype_descriptor_t *descriptor =
+		knot_rrtype_descriptor_by_type(type);
+	assert(index < descriptor->length);
+	return descriptor->wireformat[index];
+}
+
+/*!
+ * \brief Converts rdata wireformat to rdata items.
+ *
+ * \param wireformat Wireformat/.
+ * \param rrtype RR type.
+ * \param data_size Size of wireformat.
+ * \param items created rdata items.
+ *
+ * \return Number of items converted.
+ */
+static ssize_t rdata_wireformat_to_rdata_atoms(const uint16_t *wireformat,
+					uint16_t rrtype,
+					const uint16_t data_size,
+					knot_rdata_item_t **items)
+{
+	dbg_rdata("read length: %d\n", data_size);
+	uint16_t const *end = (uint16_t *)((uint8_t *)wireformat + (data_size));
+	dbg_rdata("set end pointer: %p which means length: %d\n", end,
+	          (uint8_t *)end - (uint8_t *)wireformat);
+	size_t i;
+	knot_rdata_item_t *temp_rdatas =
+		malloc(sizeof(*temp_rdatas) * MAXRDATALEN);
+	if (temp_rdatas == NULL) {
+		ERR_ALLOC_FAILED;
+		return KNOTDZCOMPILE_ENOMEM;
+	}
+	memset(temp_rdatas, 0, sizeof(*temp_rdatas) * MAXRDATALEN);
+
+	knot_rrtype_descriptor_t *descriptor =
+		knot_rrtype_descriptor_by_type(rrtype);
+
+	assert(descriptor->length <= MAXRDATALEN);
+
+	dbg_rdata("will be parsing %d items, total size: %d\n",
+	          descriptor->length, data_size);
+
+	for (i = 0; i < descriptor->length; ++i) {
+		int is_domain = 0;
+		int is_wirestore = 0;
+		size_t length = 0;
+		length = 0;
+		int required = descriptor->length;
+
+		switch (rdata_atom_wireformat_type(rrtype, i)) {
+		case KNOT_RDATA_WF_COMPRESSED_DNAME:
+		case KNOT_RDATA_WF_UNCOMPRESSED_DNAME:
+			is_domain = 1;
+			break;
+		case KNOT_RDATA_WF_LITERAL_DNAME:
+			is_domain = 1;
+			is_wirestore = 1;
+			break;
+		case KNOT_RDATA_WF_BYTE:
+			length = sizeof(uint8_t);
+			break;
+		case KNOT_RDATA_WF_SHORT:
+			length = sizeof(uint16_t);
+			break;
+		case KNOT_RDATA_WF_LONG:
+			length = sizeof(uint32_t);
+			break;
+		case KNOT_RDATA_WF_TEXT:
+		case KNOT_RDATA_WF_BINARYWITHLENGTH:
+			/* Length is stored in the first byte.  */
+			length = 1;
+			if ((uint8_t *)wireformat + length <= (uint8_t *)end) {
+			//	length += wireformat[length - 1];
+				length += *((uint8_t *)wireformat);
+				dbg_rdata("%d: set new length: %d\n", i,
+				          length);
+			}
+			/*if (buffer_position(packet) + length <= end) {
+			length += buffer_current(packet)[length - 1];
+			}*/
+			break;
+		case KNOT_RDATA_WF_A:
+			length = sizeof(in_addr_t);
+			break;
+		case KNOT_RDATA_WF_AAAA:
+			length = IP6ADDRLEN;
+			break;
+		case KNOT_RDATA_WF_BINARY:
+			/* Remaining RDATA is binary.  */
+			dbg_rdata("%d: guessing length from pointers: %p %p\n",
+			          i,
+			          wireformat, end);
+			length = (uint8_t *)end - (uint8_t *)wireformat;
+//			length = end - buffer_position(packet);
+			break;
+		case KNOT_RDATA_WF_APL:
+			length = (sizeof(uint16_t)    /* address family */
+				  + sizeof(uint8_t)   /* prefix */
+				  + sizeof(uint8_t)); /* length */
+			if ((uint8_t *)wireformat + length <= (uint8_t *)end) {
+				/* Mask out negation bit.  */
+				length += (wireformat[length - 1]
+					   & APL_LENGTH_MASK);
+			}
+			break;
+		case KNOT_RDATA_WF_IPSECGATEWAY:
+			switch (rdata_atom_data(temp_rdatas[1])[0]) {
+			/* gateway type */
+			default:
+			case IPSECKEY_NOGATEWAY:
+				length = 0;
+				break;
+			case IPSECKEY_IP4:
+				length = 4;
+				break;
+			case IPSECKEY_IP6:
+				length = IP6ADDRLEN;
+				break;
+			case IPSECKEY_DNAME:
+				is_domain = 1;
+				is_wirestore = 1;
+				break;
+			}
+			break;
+		}
+
+		if (is_domain) {
+			knot_dname_t *dname;
+
+			if (!required && (wireformat == end)) {
+				break;
+			}
+
+			dname = knot_dname_new_from_str((char *)wireformat,
+							  length,
+							  NULL);
+
+			if (dname == NULL) {
+				dbg_rdata("malformed dname!\n");
+				/*! \todo rdata purge */
+				free(temp_rdatas);
+				return KNOTDZCOMPILE_EBRDATA;
+			}
+			dbg_rdata("%d: created dname: %s\n", i,
+			          knot_dname_to_str(dname));
+
+			if (is_wirestore) {
+				/*temp_rdatas[i].raw_data =
+					(uint16_t *) region_alloc(
+				region, sizeof(uint16_t) + dname->name_size);
+				temp_rdatas[i].data[0] = dname->name_size;
+				memcpy(temp_rdatas[i].data+1, dname_name(dname),
+				dname->name_size); */
+				temp_rdatas[i].raw_data =
+					malloc(sizeof(uint16_t) +
+					       sizeof(uint8_t) * dname->size);
+				if (temp_rdatas[i].raw_data == NULL) {
+					ERR_ALLOC_FAILED;
+					/*! \todo rdata purge */
+					free(temp_rdatas);
+					return KNOTDZCOMPILE_ENOMEM;
+				}
+
+				temp_rdatas[i].raw_data[0] = dname->size;
+				memcpy(temp_rdatas[i].raw_data + 1,
+				       dname->name, dname->size);
+
+				knot_dname_release(dname);
+			} else {
+				temp_rdatas[i].dname = dname;
+			}
+
+		} else {
+			dbg_rdata("%d :length: %d %d %p %p\n", i, length,
+			          end - wireformat,
+			          wireformat, end);
+			if ((uint8_t *)wireformat + length > (uint8_t *)end) {
+				if (required) {
+					/* Truncated RDATA.  */
+					/*! \todo rdata purge */
+					free(temp_rdatas);
+					dbg_rdata("truncated rdata\n");
+					return KNOTDZCOMPILE_EBRDATA;
+				} else {
+					break;
+				}
+			}
+
+			assert(wireformat <= end); /*!< \todo remove! */
+			dbg_rdata("calling init with: %p and length : %d\n",
+			          wireformat, length);
+			temp_rdatas[i].raw_data = alloc_rdata_init(wireformat,
+			                                           length);
+			if (temp_rdatas[i].raw_data == NULL) {
+				ERR_ALLOC_FAILED;
+				/*! \todo rdata purge */
+				free(temp_rdatas);
+				return -1;
+			}
+
+//			temp_rdatas[i].raw_data[0] = length;
+//			memcpy(temp_rdatas[i].raw_data + 1, wireformat, length);
+
+/*			temp_rdatas[i].data = (uint16_t *) region_alloc(
+				region, sizeof(uint16_t) + length);
+				temp_rdatas[i].data[0] = length;
+				buffer_read(packet,
+					    temp_rdatas[i].data + 1, length); */
+		}
+		dbg_rdata("%d: adding length: %d (remaining: %d)\n", i, length,
+		          (uint8_t *)end - ((uint8_t *)wireformat + length));
+//		hex_print(temp_rdatas[i].raw_data + 1, length);
+		wireformat = (uint16_t *)((uint8_t *)wireformat + length);
+//		wireformat = wireformat + length;
+		dbg_rdata("wire: %p\n", wireformat);
+		dbg_rdata("remaining now: %d\n",
+		          end - wireformat);
+
+	}
+
+	dbg_rdata("%p %p\n", wireformat, (uint8_t *)wireformat);
+
+	if (wireformat < end) {
+		/* Trailing garbage.  */
+		dbg_rdata("w: %p e: %p %d\n", wireformat, end, end - wireformat);
+//		region_destroy(temp_region);
+		free(temp_rdatas);
+		return KNOTDZCOMPILE_EBRDATA;
+	}
+
+	*items = temp_rdatas;
+	/*	*rdatas = (rdata_atom_type *) region_alloc_init(
+			region, temp_rdatas, i * sizeof(rdata_atom_type)); */
+	return (ssize_t)i;
+}
+
+/* Taken from RFC 2535, section 7.  */
+knot_lookup_table_t dns_algorithms[] = {
+	{ 1, "RSAMD5" },	/* RFC 2537 */
+	{ 2, "DH" },		/* RFC 2539 */
+	{ 3, "DSA" },		/* RFC 2536 */
+	{ 4, "ECC" },
+	{ 5, "RSASHA1" },	/* RFC 3110 */
+	{ 252, "INDIRECT" },
+	{ 253, "PRIVATEDNS" },
+	{ 254, "PRIVATEOID" },
+	{ 0, NULL }
+};
+
+/* Taken from RFC 4398, section 2.1.  */
+knot_lookup_table_t dns_certificate_types[] = {
+	/*	0		Reserved */
+	{ 1, "PKIX" },	/* X.509 as per PKIX */
+	{ 2, "SPKI" },	/* SPKI cert */
+	{ 3, "PGP" },	/* OpenPGP packet */
+	{ 4, "IPKIX" },	/* The URL of an X.509 data object */
+	{ 5, "ISPKI" },	/* The URL of an SPKI certificate */
+	{ 6, "IPGP" },	/* The fingerprint and URL of an OpenPGP packet */
+	{ 7, "ACPKIX" },	/* Attribute Certificate */
+	{ 8, "IACPKIX" },	/* The URL of an Attribute Certificate */
+	{ 253, "URI" },	/* URI private */
+	{ 254, "OID" },	/* OID private */
+	/*	255 		Reserved */
+	/* 	256-65279	Available for IANA assignment */
+	/*	65280-65534	Experimental */
+	/*	65535		Reserved */
+	{ 0, NULL }
+};
+
+/* Imported from lexer. */
+extern int hexdigit_to_int(char ch);
+
+extern uint8_t nsecbits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE];
+extern uint16_t nsec_highest_rcode;
+
+/*!
+ * \brief Allocate SIZE+sizeof(uint16_t) bytes and store SIZE in the first
+ *        element.  Return a pointer to the allocation.
+ *
+ * \param size How many bytes to allocate.
+ */
+static uint16_t * alloc_rdata(size_t size)
+{
+	uint16_t *result = malloc(sizeof(uint16_t) + size);
+	*result = size;
+	return result;
+}
+
+uint16_t *alloc_rdata_init(const void *data, size_t size)
+{
+	uint16_t *result = malloc(sizeof(uint16_t) + size);
+	if (result == NULL) {
+		return NULL;
+	}
+	*result = size;
+	memcpy(result + 1, data, size);
+	return result;
+}
+
+/*
+ * These are parser function for generic zone file stuff.
+ */
+uint16_t * zparser_conv_hex(const char *hex, size_t len)
+{
+	/* convert a hex value to wireformat */
+	uint16_t *r = NULL;
+	uint8_t *t;
+	int i;
+
+	if (len % 2 != 0) {
+		zc_error_prev_line("number of hex digits "
+		                   "must be a multiple of 2");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else if (len > MAX_RDLENGTH * 2) {
+		zc_error_prev_line("hex data exceeds maximum rdata length (%d)",
+			MAX_RDLENGTH);
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		/* the length part */
+
+		r = alloc_rdata(len / 2);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+		t = (uint8_t *)(r + 1);
+
+		/* Now process octet by octet... */
+		while (*hex) {
+			*t = 0;
+			for (i = 16; i >= 1; i -= 15) {
+				if (isxdigit((int)*hex)) {
+					*t += hexdigit_to_int(*hex) * i;
+				} else {
+					zc_error_prev_line(
+						"illegal hex character '%c'",
+						(int) *hex);
+					parser->error_occurred =
+						KNOTDZCOMPILE_EBRDATA;
+					free(r);
+					return NULL;
+				}
+				++hex;
+			}
+			++t;
+		}
+	}
+
+	return r;
+}
+
+/* convert hex, precede by a 1-byte length */
+uint16_t * zparser_conv_hex_length(const char *hex, size_t len)
+{
+	uint16_t *r = NULL;
+	uint8_t *t;
+	int i;
+	if (len % 2 != 0) {
+		zc_error_prev_line("number of hex digits must be a "
+		                   "multiple of 2");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else if (len > 255 * 2) {
+		zc_error_prev_line("hex data exceeds 255 bytes");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		uint8_t *l;
+
+		/* the length part */
+		r = alloc_rdata(len / 2 + 1);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+
+		t = (uint8_t *)(r + 1);
+
+		l = t++;
+		*l = '\0';
+
+		/* Now process octet by octet... */
+		while (*hex) {
+			*t = 0;
+			for (i = 16; i >= 1; i -= 15) {
+				if (isxdigit((int)*hex)) {
+					*t += hexdigit_to_int(*hex) * i;
+				} else {
+					zc_error_prev_line(
+						"illegal hex character '%c'",
+						(int) *hex);
+					parser->error_occurred =
+						KNOTDZCOMPILE_EBRDATA;
+					free(r);
+					return NULL;
+				}
+				++hex;
+			}
+			++t;
+			++*l;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_time(const char *time)
+{
+	/* convert a time YYHM to wireformat */
+	uint16_t *r = NULL;
+	struct tm tm;
+
+	/* Try to scan the time... */
+	if (!strptime(time, "%Y%m%d%H%M%S", &tm)) {
+		zc_error_prev_line("date and time is expected");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		uint32_t l = htonl(mktime_from_utc(&tm));
+		r = alloc_rdata_init(&l, sizeof(l));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_services(const char *protostr, char *servicestr)
+{
+	/*
+	 * Convert a protocol and a list of service port numbers
+	 * (separated by spaces) in the rdata to wireformat
+	 */
+	uint16_t *r = NULL;
+	uint8_t *p;
+	uint8_t bitmap[65536/8];
+	char sep[] = " ";
+	char *word;
+	int max_port = -8;
+	/* convert a protocol in the rdata to wireformat */
+	struct protoent *proto;
+
+	memset(bitmap, 0, sizeof(bitmap));
+
+	proto = getprotobyname(protostr);
+	if (!proto) {
+		proto = getprotobynumber(atoi(protostr));
+	}
+	if (!proto) {
+		zc_error_prev_line("unknown protocol '%s'", protostr);
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+		return NULL;
+	}
+
+	char *sp = 0;
+	while ((word = strtok_r(servicestr, sep, &sp))) {
+		struct servent *service;
+		int port;
+
+		service = getservbyname(word, proto->p_name);
+		if (service) {
+			/* Note: ntohs not ntohl!  Strange but true.  */
+			port = ntohs((uint16_t) service->s_port);
+		} else {
+			char *end;
+			port = strtol(word, &end, 10);
+			if (*end != '\0') {
+				zc_error_prev_line(
+					"unknown service '%s' for"
+					" protocol '%s'",
+					word, protostr);
+				parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+				continue;
+			}
+		}
+
+		if (port < 0 || port > 65535) {
+			zc_error_prev_line("bad port number %d", port);
+		} else {
+			set_bit(bitmap, port);
+			if (port > max_port) {
+				max_port = port;
+			}
+		}
+	}
+
+	r = alloc_rdata(sizeof(uint8_t) + max_port / 8 + 1);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		return NULL;
+	}
+
+	p = (uint8_t *)(r + 1);
+	*p = proto->p_proto;
+	memcpy(p + 1, bitmap, *r);
+
+	return r;
+}
+
+uint16_t * zparser_conv_serial(const char *serialstr)
+{
+	uint16_t *r = NULL;
+	uint32_t serial;
+	const char *t;
+
+	serial = strtoserial(serialstr, &t);
+	if (*t != '\0') {
+		zc_error_prev_line("serial is expected");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		serial = htonl(serial);
+		r = alloc_rdata_init(&serial, sizeof(serial));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_period(const char *periodstr)
+{
+	/* convert a time period (think TTL's) to wireformat) */
+	uint16_t *r = NULL;
+	uint32_t period;
+	const char *end;
+
+	/* Allocate required space... */
+	period = strtottl(periodstr, &end);
+	if (*end != '\0') {
+		zc_error_prev_line("time period is expected");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		period = htonl(period);
+		r = alloc_rdata_init(&period, sizeof(period));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_short(const char *text)
+{
+	uint16_t *r = NULL;
+	uint16_t value;
+	char *end;
+
+	value = htons((uint16_t) strtol(text, &end, 10));
+	if (*end != '\0') {
+		zc_error_prev_line("integer value is expected");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		r = alloc_rdata_init(&value, sizeof(value));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_byte(const char *text)
+{
+	uint16_t *r = NULL;
+	uint8_t value;
+	char *end;
+
+	value = (uint8_t) strtol(text, &end, 10);
+	if (*end != '\0') {
+		zc_error_prev_line("integer value is expected");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		r = alloc_rdata_init(&value, sizeof(value));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_algorithm(const char *text)
+{
+	const knot_lookup_table_t *alg;
+	uint8_t id;
+
+	alg = knot_lookup_by_name(dns_algorithms, text);
+	if (alg) {
+		id = (uint8_t) alg->id;
+	} else {
+		char *end;
+		id = (uint8_t) strtol(text, &end, 10);
+		if (*end != '\0') {
+			zc_error_prev_line("algorithm is expected");
+			parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+			return NULL;
+		}
+	}
+
+	uint16_t *r = alloc_rdata_init(&id, sizeof(id));
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		return NULL;
+	}
+
+	return r;
+}
+
+uint16_t * zparser_conv_certificate_type(const char *text)
+{
+	/* convert a algoritm string to integer */
+	const knot_lookup_table_t *type;
+	uint16_t id;
+
+	type = knot_lookup_by_name(dns_certificate_types, text);
+	if (type) {
+		id = htons((uint16_t) type->id);
+	} else {
+		char *end;
+		id = htons((uint16_t) strtol(text, &end, 10));
+		if (*end != '\0') {
+			zc_error_prev_line("certificate type is expected");
+			parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+			return NULL;
+		}
+	}
+
+	uint16_t *r = alloc_rdata_init(&id, sizeof(id));
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		return NULL;
+	}
+
+	return r;
+}
+
+uint16_t * zparser_conv_a(const char *text)
+{
+	in_addr_t address;
+	uint16_t *r = NULL;
+
+	if (inet_pton(AF_INET, text, &address) != 1) {
+		zc_error_prev_line("invalid IPv4 address '%s'", text);
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		r = alloc_rdata_init(&address, sizeof(address));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+
+	return r;
+}
+
+uint16_t * zparser_conv_aaaa(const char *text)
+{
+	uint8_t address[IP6ADDRLEN];
+	uint16_t *r = NULL;
+
+	if (inet_pton(AF_INET6, text, address) != 1) {
+		zc_error_prev_line("invalid IPv6 address '%s'", text);
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		r = alloc_rdata_init(address, sizeof(address));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_text(const char *text, size_t len)
+{
+	uint16_t *r = NULL;
+
+	dbg_zp("Converting text: %s\n", text);
+
+	if (len > 255) {
+		zc_error_prev_line("text string is longer than 255 characters,"
+			" try splitting it into multiple parts");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		uint8_t *p;
+		r = alloc_rdata(len + 1);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+		p = (uint8_t *)(r + 1);
+		*p = len;
+		memcpy(p + 1, text, len);
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_dns_name(const uint8_t *name, size_t len)
+{
+	uint16_t *r = NULL;
+	uint8_t *p = NULL;
+	r = alloc_rdata(len);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		return NULL;
+	}
+	p = (uint8_t *)(r + 1);
+	memcpy(p, name, len);
+
+	return r;
+}
+
+uint16_t * zparser_conv_b32(const char *b32)
+{
+	uint8_t buffer[B64BUFSIZE];
+	uint16_t *r = NULL;
+	size_t i = B64BUFSIZE - 1;
+
+	if (strcmp(b32, "-") == 0) {
+		r = alloc_rdata_init("", 1);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+		return r;
+	}
+
+	/*!< \todo BLEEDING EYES! */
+
+	char b32_copy[strlen(b32) + 1];
+
+	for (int i = 0; i < strlen(b32); i++) {
+		b32_copy[i] = toupper(b32[i]);
+	}
+
+	/*!< \todo BLEEDING EYES! */
+	b32_copy[strlen(b32)] = '\0';
+
+	if (!base32hex_decode(b32_copy,
+	                      strlen(b32_copy), (char *)buffer + 1, &i)) {
+		zc_error_prev_line("invalid base32 data");
+		parser->error_occurred = 1;
+	} else {
+		buffer[0] = i; /* store length byte */
+		r = alloc_rdata_init(buffer, i + 1);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_b64(const char *b64)
+{
+	uint8_t buffer[B64BUFSIZE];
+	uint16_t *r = NULL;
+	int i;
+
+	i = b64_pton(b64, buffer, B64BUFSIZE);
+	if (i == -1) {
+		zc_error_prev_line("invalid base64 data\n");
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		r = alloc_rdata_init(buffer, i);
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_rrtype(const char *text)
+{
+	uint16_t *r = NULL;
+	uint16_t type = knot_rrtype_from_string(text);
+
+	if (type == 0) {
+		zc_error_prev_line("unrecognized RR type '%s'", text);
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+	} else {
+		type = htons(type);
+		r = alloc_rdata_init(&type, sizeof(type));
+		if (r == NULL) {
+			ERR_ALLOC_FAILED;
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+			return NULL;
+		}
+	}
+	return r;
+}
+
+uint16_t * zparser_conv_nxt(uint8_t nxtbits[])
+{
+	/* nxtbits[] consists of 16 bytes with some zero's in it
+	 * copy every byte with zero to r and write the length in
+	 * the first byte
+	 */
+	uint16_t i;
+	uint16_t last = 0;
+
+	for (i = 0; i < 16; i++) {
+		if (nxtbits[i] != 0) {
+			last = i + 1;
+		}
+	}
+
+	uint16_t *r = alloc_rdata_init(nxtbits, last);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		return NULL;
+	}
+
+	return r;
+}
+
+
+/* we potentially have 256 windows, each one is numbered. empty ones
+ * should be discarded
+ */
+uint16_t * zparser_conv_nsec(uint8_t nsecbits[NSEC_WINDOW_COUNT]
+					     [NSEC_WINDOW_BITS_SIZE])
+{
+	/* nsecbits contains up to 64K of bits which represent the
+	 * types available for a name. Walk the bits according to
+	 * nsec++ draft from jakob
+	 */
+	uint16_t *r;
+	uint8_t *ptr;
+	size_t i, j;
+	uint16_t window_count = 0;
+	uint16_t total_size = 0;
+	uint16_t window_max = 0;
+
+	/* The used windows.  */
+	int used[NSEC_WINDOW_COUNT];
+	/* The last byte used in each the window.  */
+	int size[NSEC_WINDOW_COUNT];
+
+	window_max = 1 + (nsec_highest_rcode / 256);
+
+	/* used[i] is the i-th window included in the nsec
+	 * size[used[0]] is the size of window 0
+	 */
+
+	/* walk through the 256 windows */
+	for (i = 0; i < window_max; ++i) {
+		int empty_window = 1;
+		/* check each of the 32 bytes */
+		for (j = 0; j < NSEC_WINDOW_BITS_SIZE; ++j) {
+			if (nsecbits[i][j] != 0) {
+				size[i] = j + 1;
+				empty_window = 0;
+			}
+		}
+		if (!empty_window) {
+			used[window_count] = i;
+			window_count++;
+		}
+	}
+
+	for (i = 0; i < window_count; ++i) {
+		total_size += sizeof(uint16_t) + size[used[i]];
+	}
+
+	r = alloc_rdata(total_size);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		parser->error_occurred = KNOTDZCOMPILE_EBRDATA;
+		return NULL;
+	}
+	ptr = (uint8_t *)(r + 1);
+
+	/* now walk used and copy it */
+	for (i = 0; i < window_count; ++i) {
+		ptr[0] = used[i];
+		ptr[1] = size[used[i]];
+		memcpy(ptr + 2, &nsecbits[used[i]], size[used[i]]);
+		ptr += size[used[i]] + 2;
+	}
+
+	return r;
+}
+
+/* Parse an int terminated in the specified range. */
+static int parse_int(const char *str,
+		     char **end,
+		     int *result,
+		     const char *name,
+		     int min,
+		     int max)
+{
+	long value;
+	value = strtol(str, end, 10);
+	if (value < min || value > max) {
+		zc_error_prev_line("%s must be within the range [%d .. %d]",
+			name,
+			min,
+			max);
+		return 0;
+	} else {
+		*result = (int) value;
+		return 1;
+	}
+}
+
+/* RFC1876 conversion routines */
+static uint32_t poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
+				  1000000, 10000000, 100000000, 1000000000
+				 };
+
+/*
+ * Converts ascii size/precision X * 10**Y(cm) to 0xXY.
+ * Sets the given pointer to the last used character.
+ *
+ */
+static uint8_t precsize_aton(char *cp, char **endptr)
+{
+	unsigned int mval = 0, cmval = 0;
+	uint8_t retval = 0;
+	int exponent;
+	int mantissa;
+
+	while (isdigit((int)*cp)) {
+		mval = mval * 10 + hexdigit_to_int(*cp++);
+	}
+
+	if (*cp == '.') {	/* centimeters */
+		cp++;
+		if (isdigit((int)*cp)) {
+			cmval = hexdigit_to_int(*cp++) * 10;
+			if (isdigit((int)*cp)) {
+				cmval += hexdigit_to_int(*cp++);
+			}
+		}
+	}
+
+	if (mval >= poweroften[7]) {
+		/* integer overflow possible for *100 */
+		mantissa = mval / poweroften[7];
+		exponent = 9; /* max */
+	} else {
+		cmval = (mval * 100) + cmval;
+
+		for (exponent = 0; exponent < 9; exponent++)
+			if (cmval < poweroften[exponent+1]) {
+				break;
+			}
+
+		mantissa = cmval / poweroften[exponent];
+	}
+	if (mantissa > 9) {
+		mantissa = 9;
+	}
+
+	retval = (mantissa << 4) | exponent;
+
+	if (*cp == 'm') {
+		cp++;
+	}
+
+	*endptr = cp;
+
+	return (retval);
+}
+
+/*
+ * Parses a specific part of rdata.
+ *
+ * Returns:
+ *
+ *	number of elements parsed
+ *	zero on error
+ *
+ */
+uint16_t * zparser_conv_loc(char *str)
+{
+	uint16_t *r;
+	uint32_t *p;
+	int i;
+	int deg, min, secs;	/* Secs is stored times 1000.  */
+	uint32_t lat = 0, lon = 0, alt = 0;
+	/* encoded defaults: version=0 sz=1m hp=10000m vp=10m */
+	uint8_t vszhpvp[4] = {0, 0x12, 0x16, 0x13};
+	char *start;
+	double d;
+
+	for (;;) {
+		deg = min = secs = 0;
+
+		/* Degrees */
+		if (*str == '\0') {
+			zc_error_prev_line("unexpected end of LOC data");
+			return NULL;
+		}
+
+		if (!parse_int(str, &str, &deg, "degrees", 0, 180)) {
+			return NULL;
+		}
+		if (!isspace((int)*str)) {
+			zc_error_prev_line("space expected after degrees");
+			return NULL;
+		}
+		++str;
+
+		/* Minutes? */
+		if (isdigit((int)*str)) {
+			if (!parse_int(str, &str, &min, "minutes", 0, 60)) {
+				return NULL;
+			}
+			if (!isspace((int)*str)) {
+				zc_error_prev_line("space expected after minutes");
+				return NULL;
+			}
+			++str;
+		}
+
+		/* Seconds? */
+		if (isdigit((int)*str)) {
+			start = str;
+			if (!parse_int(str, &str, &i, "seconds", 0, 60)) {
+				return NULL;
+			}
+
+			if (*str == '.' && !parse_int(str + 1, &str, &i,
+						      "seconds fraction",
+						      0, 999)) {
+				return NULL;
+			}
+
+			if (!isspace((int)*str)) {
+				zc_error_prev_line("space expected after seconds");
+				return NULL;
+			}
+
+			if (sscanf(start, "%lf", &d) != 1) {
+				zc_error_prev_line("error parsing seconds");
+			}
+
+			if (d < 0.0 || d > 60.0) {
+				zc_error_prev_line(
+					"seconds not in range 0.0 .. 60.0");
+			}
+
+			secs = (int)(d * 1000.0 + 0.5);
+			++str;
+		}
+
+		switch (*str) {
+		case 'N':
+		case 'n':
+			lat = ((uint32_t)1 << 31) +
+				(deg * 3600000 + min * 60000 + secs);
+			break;
+		case 'E':
+		case 'e':
+			lon = ((uint32_t)1 << 31) +
+				(deg * 3600000 + min * 60000 + secs);
+			break;
+		case 'S':
+		case 's':
+			lat = ((uint32_t)1 << 31) -
+				(deg * 3600000 + min * 60000 + secs);
+			break;
+		case 'W':
+		case 'w':
+			lon = ((uint32_t)1 << 31) -
+				(deg * 3600000 + min * 60000 + secs);
+			break;
+		default:
+			zc_error_prev_line(
+				"invalid latitude/longtitude: '%c'", *str);
+			return NULL;
+		}
+		++str;
+
+		if (lat != 0 && lon != 0) {
+			break;
+		}
+
+		if (!isspace((int)*str)) {
+			zc_error_prev_line("space expected after"
+				" latitude/longitude");
+			return NULL;
+		}
+		++str;
+	}
+
+	/* Altitude */
+	if (*str == '\0') {
+		zc_error_prev_line("unexpected end of LOC data");
+		return NULL;
+	}
+
+	if (!isspace((int)*str)) {
+		zc_error_prev_line("space expected before altitude");
+		return NULL;
+	}
+	++str;
+
+	start = str;
+
+	/* Sign */
+	if (*str == '+' || *str == '-') {
+		++str;
+	}
+
+	/* Meters of altitude... */
+	int ret = strtol(str, &str, 10);
+	UNUSED(ret); // Result checked in following switch
+
+	switch (*str) {
+	case ' ':
+	case '\0':
+	case 'm':
+		break;
+	case '.':
+		if (!parse_int(str + 1, &str, &i, "altitude fraction", 0, 99)) {
+			return NULL;
+		}
+		if (!isspace((int)*str) && *str != '\0' && *str != 'm') {
+			zc_error_prev_line("altitude fraction must be a number");
+			return NULL;
+		}
+		break;
+	default:
+		zc_error_prev_line("altitude must be expressed in meters");
+		return NULL;
+	}
+	if (!isspace((int)*str) && *str != '\0') {
+		++str;
+	}
+
+	if (sscanf(start, "%lf", &d) != 1) {
+		zc_error_prev_line("error parsing altitude");
+	}
+
+	alt = (uint32_t)(10000000.0 + d * 100 + 0.5);
+
+	if (!isspace((int)*str) && *str != '\0') {
+		zc_error_prev_line("unexpected character after altitude");
+		return NULL;
+	}
+
+	/* Now parse size, horizontal precision and vertical precision if any */
+	for (i = 1; isspace((int)*str) && i <= 3; i++) {
+		vszhpvp[i] = precsize_aton(str + 1, &str);
+
+		if (!isspace((int)*str) && *str != '\0') {
+			zc_error_prev_line("invalid size or precision");
+			return NULL;
+		}
+	}
+
+	/* Allocate required space... */
+	r = alloc_rdata(16);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	p = (uint32_t *)(r + 1);
+
+	memmove(p, vszhpvp, 4);
+	write_uint32(p + 1, lat);
+	write_uint32(p + 2, lon);
+	write_uint32(p + 3, alt);
+
+	return r;
+}
+
+/*
+ * Convert an APL RR RDATA element.
+ */
+uint16_t * zparser_conv_apl_rdata(char *str)
+{
+	int negated = 0;
+	uint16_t address_family;
+	uint8_t prefix;
+	uint8_t maximum_prefix;
+	uint8_t length;
+	uint8_t address[IP6ADDRLEN];
+	char *colon = strchr(str, ':');
+	char *slash = strchr(str, '/');
+	int af;
+	int rc;
+	uint16_t rdlength;
+	uint16_t *r;
+	uint8_t *t;
+	char *end;
+	long p;
+
+	if (!colon) {
+		zc_error_prev_line("address family separator is missing");
+		return NULL;
+	}
+	if (!slash) {
+		zc_error_prev_line("prefix separator is missing");
+		return NULL;
+	}
+
+	*colon = '\0';
+	*slash = '\0';
+
+	if (*str == '!') {
+		negated = 1;
+		++str;
+	}
+
+	if (strcmp(str, "1") == 0) {
+		address_family = htons(1);
+		af = AF_INET;
+		length = sizeof(in_addr_t);
+		maximum_prefix = length * 8;
+	} else if (strcmp(str, "2") == 0) {
+		address_family = htons(2);
+		af = AF_INET6;
+		length = IP6ADDRLEN;
+		maximum_prefix = length * 8;
+	} else {
+		zc_error_prev_line("invalid address family '%s'", str);
+		return NULL;
+	}
+
+	rc = inet_pton(af, colon + 1, address);
+	if (rc == 0) {
+		zc_error_prev_line("invalid address '%s'", colon + 1);
+		return NULL;
+	} else if (rc == -1) {
+		char ebuf[256];
+		zc_error_prev_line("inet_pton failed: %s",
+			strerror_r(errno, ebuf, sizeof(ebuf)));
+		return NULL;
+	}
+
+	/* Strip trailing zero octets.	*/
+	while (length > 0 && address[length - 1] == 0) {
+		--length;
+	}
+
+
+	p = strtol(slash + 1, &end, 10);
+	if (p < 0 || p > maximum_prefix) {
+		zc_error_prev_line("prefix not in the range 0 .. %d",
+			maximum_prefix);
+		return NULL;
+	} else if (*end != '\0') {
+		zc_error_prev_line("invalid prefix '%s'", slash + 1);
+		return NULL;
+	}
+	prefix = (uint8_t) p;
+
+	rdlength = (sizeof(address_family) + sizeof(prefix) + sizeof(length)
+		    + length);
+	r = alloc_rdata(rdlength);
+	if (r == NULL) {
+		ERR_ALLOC_FAILED;
+		return NULL;
+	}
+	t = (uint8_t *)(r + 1);
+
+	memcpy(t, &address_family, sizeof(address_family));
+	t += sizeof(address_family);
+	memcpy(t, &prefix, sizeof(prefix));
+	t += sizeof(prefix);
+	memcpy(t, &length, sizeof(length));
+	if (negated) {
+		*t |= APL_NEGATION_MASK;
+	}
+	t += sizeof(length);
+	memcpy(t, address, length);
+
+	return r;
+}
+
+/*
+ * Below some function that also convert but not to wireformat
+ * but to "normal" (int,long,char) types
+ */
+
+uint32_t zparser_ttl2int(const char *ttlstr, int *error)
+{
+	/* convert a ttl value to a integer
+	 * return the ttl in a int
+	 * -1 on error
+	 */
+
+	uint32_t ttl;
+	const char *t;
+
+	ttl = strtottl(ttlstr, &t);
+	if (*t != 0) {
+		zc_error_prev_line("invalid TTL value: %s", ttlstr);
+		*error = 1;
+	}
+
+	return ttl;
+}
+
+void zadd_rdata_wireformat(uint16_t *data)
+{
+	parser->temporary_items[parser->rdata_count].raw_data = data;
+	parser->rdata_count++;
+}
+
+/**
+ * Used for TXT RR's to grow with undefined number of strings.
+ */
+void zadd_rdata_txt_wireformat(uint16_t *data, int first)
+{
+	dbg_zp("Adding text!\n");
+//	hex_print(data + 1, data[0]);
+	knot_rdata_item_t *rd;
+
+	/* First STR in str_seq, allocate 65K in first unused rdata
+	 * else find last used rdata */
+	if (first) {
+		rd = &parser->temporary_items[parser->rdata_count];
+//		if ((rd->data = (uint8_t *) region_alloc(parser->rr_region,
+//			sizeof(uint8_t) + 65535 * sizeof(uint8_t))) == NULL) {
+//			zc_error_prev_line("Could not allocate memory for TXT RR");
+//			return;
+//		}
+		rd->raw_data = alloc_rdata(65535 * sizeof(uint8_t));
+		if (rd->raw_data == NULL) {
+			parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+		}
+		parser->rdata_count++;
+		rd->raw_data[0] = 0;
+	} else {
+//		assert(0);
+		rd = &parser->temporary_items[parser->rdata_count-1];
+	}
+
+	if ((size_t)rd->raw_data[0] + (size_t)data[0] > 65535) {
+		zc_error_prev_line("too large rdata element");
+		return;
+	}
+
+	memcpy((uint8_t *)rd->raw_data + 2 + rd->raw_data[0],
+	       data + 1, data[0]);
+	rd->raw_data[0] += data[0];
+	free(data);
+	dbg_zp("Item after add\n");
+//	hex_print(rd->raw_data + 1, rd->raw_data[0]);
+}
+
+void zadd_rdata_domain(knot_dname_t *dname)
+{
+	knot_dname_retain(dname);
+//	printf("Adding rdata name: %s %p\n", dname->name, dname);
+	parser->temporary_items[parser->rdata_count].dname = dname;
+	parser->rdata_count++;
+}
+
+void parse_unknown_rdata(uint16_t type, uint16_t *wireformat)
+{
+	dbg_rdata("parsing unknown rdata for type: %d\n", type);
+//	buffer_type packet;
+	uint16_t size;
+	ssize_t rdata_count;
+	ssize_t i;
+	knot_rdata_item_t *items = NULL;
+
+	if (wireformat) {
+		size = *wireformat;
+	} else {
+		return;
+	}
+
+//	buffer_create_from(&packet, wireformat + 1, *wireformat);
+	rdata_count = rdata_wireformat_to_rdata_atoms(wireformat + 1, type,
+						      size, &items);
+//	dbg_rdata("got %d items\n", rdata_count);
+	dbg_rdata("wf to items returned error: %s (%d)\n",
+	          error_to_str(knot_zcompile_error_msgs, rdata_count),
+	                       rdata_count);
+	if (rdata_count < 0) {
+		zc_error_prev_line("bad unknown RDATA\n");
+		/*!< \todo leaks */
+		return;
+	}
+
+	for (i = 0; i < rdata_count; ++i) {
+		if (rdata_atom_is_domain(type, i)) {
+			zadd_rdata_domain(items[i].dname);
+		} else {
+			//XXX won't this create size two times?
+			zadd_rdata_wireformat((uint16_t *)items[i].raw_data);
+		}
+	}
+	free(items);
+	/* Free wireformat */
+	free(wireformat);
+}
+
+void set_bitnsec(uint8_t bits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE],
+	                uint16_t index)
+{
+	/*
+	 * The bits are counted from left to right, so bit #0 is the
+	 * left most bit.
+	 */
+	uint8_t window = index / 256;
+	uint8_t bit = index % 256;
+
+	bits[window][bit / 8] |= (1 << (7 - bit % 8));
+}
+
diff --git a/src/zcompile/parser-util.h b/src/zcompile/parser-util.h
new file mode 100644
index 0000000..57258dc
--- /dev/null
+++ b/src/zcompile/parser-util.h
@@ -0,0 +1,357 @@
+/*!
+ * \file parser-util.h
+ *
+ * \author NLnet Labs
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *         Minor modifications by CZ.NIC, z.s.p.o.
+ *
+ * \brief Zone compiler utility functions.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _KNOTD_PARSER_UTIL_H_
+#define _KNOTD_PARSER_UTIL_H_
+
+#include <assert.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <time.h>
+#include <netinet/in.h>
+#include <netdb.h>
+
+#include "zcompile/zcompile.h"
+#include "libknot/util/descriptor.h"
+
+int inet_pton4(const char *src, uint8_t *dst);
+int inet_pton6(const char *src, uint8_t *dst);
+//int my_b32_pton(const char *src, uint8_t *target, size_t tsize);
+const char *inet_ntop4(const u_char *src, char *dst, size_t size);
+const char *inet_ntop6(const u_char *src, char *dst, size_t size);
+int inet_pton(int af, const char *src, void *dst);
+void b64_initialize_rmap();
+int b64_pton_do(char const *src, uint8_t *target, size_t targsize);
+int b64_pton_len(char const *src);
+int b64_pton(char const *src, uint8_t *target, size_t targsize);
+void set_bit(uint8_t bits[], size_t index);
+uint32_t strtoserial(const char *nptr, const char **endptr);
+void write_uint32(void *dst, uint32_t data);
+uint32_t strtottl(const char *nptr, const char **endptr);
+time_t mktime_from_utc(const struct tm *tm);
+
+/*!< Conversions from text to wire. */
+/*!
+ * \brief Converts hex text format to wireformat.
+ *
+ * \param hex String to be converted.
+ * \param len Length of string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_hex(const char *hex, size_t len);
+
+/*!
+ * \brief Converts hex text format with length to wireformat.
+ *
+ * \param hex String to be converted/.
+ * \param len Length of string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_hex_length(const char *hex, size_t len);
+
+/*!
+ * \brief Converts time string to wireformat.
+ *
+ * \param time Time string to be converted.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_time(const char *time);
+/*!
+ * \brief Converts a protocol and a list of service port numbers
+ * (separated by spaces) in the rdata to wireformat
+ *
+ * \param protostr Protocol string.
+ * \param servicestr Service string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_services(const char *protostr, char *servicestr);
+
+/*!
+ * \brief Converts serial to wireformat.
+ *
+ * \param serialstr Serial string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_serial(const char *serialstr);
+/*!
+ * \brief Converts period to wireformat.
+ *
+ * \param periodstr Period string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_period(const char *periodstr);
+
+/*!
+ * \brief Converts short int to wireformat.
+ *
+ * \param text String containing short int.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_short(const char *text);
+
+/*!
+ * \brief Converts long int to wireformat.
+ *
+ * \param text String containing long int.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_long(const char *text);
+
+/*!
+ * \brief Converts byte to wireformat.
+ *
+ * \param text String containing byte.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_byte(const char *text);
+
+/*!
+ * \brief Converts A rdata string to wireformat.
+ *
+ * \param text String containing A rdata.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_a(const char *text);
+
+/*!
+ * \brief Converts AAAA rdata string to wireformat.
+ *
+ * \param text String containing AAAA rdata.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_aaaa(const char *text);
+
+/*!
+ * \brief Converts text string to wireformat.
+ *
+ * \param text Text string.
+ * \param len Length of string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_text(const char *text, size_t len);
+
+/*!
+ * \brief Converts domain name string to wireformat.
+ *
+ * \param name Domain name string.
+ * \param len Length of string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_dns_name(const uint8_t* name, size_t len);
+
+/*!
+ * \brief Converts base32 encoded string to wireformat.
+ * TODO consider replacing with our implementation.
+ *
+ * \param b32 Base32 encoded string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_b32(const char *b32);
+
+/*!
+ * \brief Converts base64 encoded string to wireformat.
+ * TODO consider replacing with our implementation.
+ *
+ * \param b64 Base64 encoded string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_b64(const char *b64);
+
+/*!
+ * \brief Converts RR type string to wireformat.
+ *
+ * \param rr RR type string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_rrtype(const char *rr);
+
+/*!
+ * \brief Converts NXT string to wireformat.
+ *
+ * \param nxtbits NXT string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_nxt(uint8_t *nxtbits);
+
+/*!
+ * \brief Converts NSEC bitmap to wireformat.
+ *
+ * \param nsecbits[][] NSEC bits.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_nsec(uint8_t nsecbits[NSEC_WINDOW_COUNT]
+					   [NSEC_WINDOW_BITS_SIZE]);
+/*!
+ * \brief Converts LOC string to wireformat.
+ *
+ * \param str LOC string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_loc(char *str);
+
+/*!
+ * \brief Converts algorithm string to wireformat.
+ *
+ * \param algstr Algorithm string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_algorithm(const char *algstr);
+
+/*!
+ * \brief Converts certificate type string to wireformat.
+ *
+ * \param typestr Certificate type mnemonic string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_certificate_type(const char *typestr);
+
+/*!
+ * \brief Converts APL data to wireformat.
+ *
+ * \param str APL data string.
+ *
+ * \return Converted wireformat.
+ */
+uint16_t *zparser_conv_apl_rdata(char *str);
+
+/*!
+ * \brief Parses unknown rdata.
+ *
+ * \param type Type of data.
+ * \param wireformat Wireformat of data.
+ *
+ * \return Converted wireformat.
+ */
+void parse_unknown_rdata(uint16_t type, uint16_t *wireformat);
+
+/*!
+ * \brief Converts TTL string to int.
+ *
+ * \param ttlstr String
+ * \param error Error code.
+ *
+ * \return Converted wireformat.
+ */
+uint32_t zparser_ttl2int(const char *ttlstr, int* error);
+
+/*!
+ * \brief Adds wireformat to temporary list of rdata items.
+ *
+ * \param data Wireformat to be added.
+ */
+void zadd_rdata_wireformat(uint16_t *data);
+
+/*!
+ * \brief Adds TXT wireformat to temporary list of rdata items.
+ *
+ * \param data Wireformat to be added.
+ * \param first This is first text to be added.
+ */
+void zadd_rdata_txt_wireformat(uint16_t *data, int first);
+
+/*!
+ * \brief Cleans after using zadd_rdata_txt_wireformat().
+ */
+void zadd_rdata_txt_clean_wireformat();
+
+/*!
+ * \brief Adds domain name to temporary list of rdata items.
+ *
+ * \param domain Domain name to be added.
+ */
+void zadd_rdata_domain(knot_dname_t *domain);
+
+/*!
+ * \brief Sets bit in NSEC bitmap.
+ *
+ * \param bits[][] NSEC bitmaps.
+ * \param index Index on which bit is to be set.
+ */
+void set_bitnsec(uint8_t bits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE],
+		 uint16_t index);
+
+/*!
+ * \brief Allocate and init wireformat.
+ *
+ * \param data Data to be copied into newly created wireformat.
+ * \param size Size of data.
+ *
+ * \return Allocated wireformat.
+ */
+uint16_t *alloc_rdata_init(const void *data, size_t size);
+uint16_t rrsig_type_covered(knot_rrset_t *rrset);
+
+
+#endif /* _KNOTD_PARSER_UTIL_H_ */
+
+/*! @} */
diff --git a/src/zcompile/tests/unittests_zp_main.c b/src/zcompile/tests/unittests_zp_main.c
new file mode 100644
index 0000000..5d8c5e9
--- /dev/null
+++ b/src/zcompile/tests/unittests_zp_main.c
@@ -0,0 +1,62 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "knot/common.h"
+#include "common/libtap/tap_unit.h"
+
+// Units to test
+#include "zcompile_tests.c"
+
+// Run all loaded units
+int main(int argc, char *argv[])
+{
+	// Open log
+	//log_init(LOG_UPTO(LOG_ERR), LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING));
+
+	// Build test set
+	unit_api *tests[] = {
+		&zoneparser_tests_api, //! Zoneparser unit
+		NULL
+	};
+
+	// Plan number of tests
+	int id = 0;
+	int test_count = 0;
+	note("Units:");
+	while (tests[id] != NULL) {
+		note("- %s : %d tests", tests[id]->name,
+		     tests[id]->count(argc, argv));
+		test_count += tests[id]->count(argc, argv);
+		++id;
+	}
+
+	plan(test_count);
+
+	// Run tests
+	id = 0;
+	while (tests[id] != NULL) {
+		diag("Testing unit: %s", tests[id]->name);
+		tests[id]->run(argc, argv);
+		++id;
+	}
+
+	//log_close();
+
+	// Evaluate
+	return exit_status();
+}
+
diff --git a/src/zcompile/tests/zcompile_tests.c b/src/zcompile/tests/zcompile_tests.c
new file mode 100644
index 0000000..5d3dce6
--- /dev/null
+++ b/src/zcompile/tests/zcompile_tests.c
@@ -0,0 +1,425 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include "libknot/zone/zone.h"
+#include "knot/zone/zone-load.h"
+#include "knot/common.h"
+#include "libknot/rrset.h"
+#include "libknot/util/descriptor.h"
+#include "zcompile/zcompile.h"
+
+#ifdef TEST_WITH_LDNS
+#include "ldns/ldns.h"
+#endif
+
+static int zoneparser_tests_count(int argc, char *argv[]);
+static int zoneparser_tests_run(int argc, char *argv[]);
+
+/*
+ * Unit API.
+ */
+unit_api zoneparser_tests_api = {
+	"Zoneparser",
+	&zoneparser_tests_count,
+	&zoneparser_tests_run
+};
+
+#ifdef TEST_WITH_LDNS
+/*
+ *  Unit implementation.
+ */static int compare_wires_simple_zp(uint8_t *wire1,
+				      uint8_t *wire2, uint count)
+{
+	int i = 0;
+	while (i < count &&
+	       wire1[i] == wire2[i]) {
+		i++;
+	}
+	return (!(count == i));
+}
+
+/* compares only one rdata */
+static int compare_rr_rdata_silent(knot_rdata_t *rdata, ldns_rr *rr,
+				   uint16_t type)
+{
+	knot_rrtype_descriptor_t *desc =
+		knot_rrtype_descriptor_by_type(type);
+	for (int i = 0; i < rdata->count; i++) {
+		/* TODO check for ldns "descriptors" as well */
+		if (desc->wireformat[i] == KNOT_RDATA_WF_COMPRESSED_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_LITERAL_DNAME ||
+		    desc->wireformat[i] == KNOT_RDATA_WF_UNCOMPRESSED_DNAME) {
+			assert(ldns_rr_rdf(rr, i));
+			if (rdata->items[i].dname->size !=
+			    ldns_rdf_size(ldns_rr_rdf(rr, i))) {
+				return 1;
+			}
+			if (compare_wires_simple_zp(rdata->items[i].dname->name,
+				ldns_rdf_data(ldns_rr_rdf(rr, i)),
+				rdata->items[i].dname->size) != 0) {
+				return 1;
+			}
+		} else {
+			if (ldns_rr_rdf(rr, i) == NULL &&
+			    rdata->items[i].raw_data[0] != 0) {
+				return 1;
+			} else {
+				continue;
+			}
+			if (rdata->items[i].raw_data[0] !=
+			    ldns_rdf_size(ldns_rr_rdf(rr, i))) {
+
+				/* ldns stores the size including the
+				 * length, dnslib does not */
+				if (abs(rdata->items[i].raw_data[0] -
+				    ldns_rdf_size(ldns_rr_rdf(rr, i))) != 1) {
+					return 1;
+				}
+			}
+			if (compare_wires_simple_zp((uint8_t *)
+				(rdata->items[i].raw_data + 1),
+				ldns_rdf_data(ldns_rr_rdf(rr, i)),
+				rdata->items[i].raw_data[0]) != 0) {
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+static int compare_rrset_w_ldns_rrset(const knot_rrset_t *rrset,
+				      ldns_rr_list *rrs,
+				      char check_rdata, char verbose)
+{
+	/* We should have only one rrset from ldns, although it is
+	 * represented as rr_list ... */
+
+	/* TODO errors */
+
+	assert(rrs);
+	assert(rrset);
+
+	ldns_rr_list_sort(rrs);
+
+	/* compare headers */
+
+	ldns_rr *rr = ldns_rr_list_rr(rrs, 0);
+
+	if (rrset->owner->size != ldns_rdf_size(ldns_rr_owner(rr))) {
+		diag("RRSet owner names differ in length");
+		if (!verbose) {
+			return 1;
+		}
+		diag("ldns: %d, dnslib: %d", ldns_rdf_size(ldns_rr_owner(rr)),
+		     rrset->owner->size);
+		diag("%s", knot_dname_to_str(rrset->owner));
+		diag("%s", ldns_rdf_data(ldns_rr_owner(rr)));
+		return 1;
+	}
+
+	if (compare_wires_simple_zp(rrset->owner->name,
+				   ldns_rdf_data(ldns_rr_owner(rr)),
+				   rrset->owner->size) != 0) {
+		diag("RRSet owner wireformats differ");
+		return 1;
+	}
+
+	if (rrset->type != ldns_rr_get_type(rr)) {
+		diag("RRset types differ");
+		if (!verbose) {
+			return 1;
+		}
+		diag("Dnslib type: %d Ldns type: %d", rrset->type,
+		     ldns_rr_get_type(rr));
+		return 1;
+	}
+
+	if (rrset->rclass != ldns_rr_get_class(rr)) {
+		diag("RRset classes differ");
+		return 1;
+	}
+
+	if (rrset->ttl != ldns_rr_ttl(rr)) {
+		diag("RRset TTLs differ");
+		if (!verbose) {
+			return 1;
+		}
+		diag("dnslib: %d ldns: %d", rrset->ttl, ldns_rr_ttl(rr));
+		return 1;
+	}
+
+	if (!check_rdata) {
+		return 0;
+	}
+
+	/* compare rdatas */
+
+	/* sort dnslib rdata */
+
+	knot_rdata_t *tmp_rdata = rrset->rdata;
+
+	rr = ldns_rr_list_pop_rr(rrs);
+
+	char found;
+
+	while (rr != NULL) {
+		found = 0;
+		tmp_rdata = rrset->rdata;
+		while (!found &&
+		       tmp_rdata->next != rrset->rdata) {
+			if (compare_rr_rdata_silent(tmp_rdata, rr,
+						    rrset->type) == 0) {
+				found = 1;
+			}
+			tmp_rdata = tmp_rdata->next;
+		}
+
+		if (!found &&
+		    compare_rr_rdata_silent(tmp_rdata, rr, rrset->type) == 0) {
+			found = 1;
+		}
+
+		/* remove the found rdata from list */
+		if (!found) {
+			diag("RRsets rdata differ");
+			return 1;
+		}
+		ldns_rr_free(rr);
+
+		rr = ldns_rr_list_pop_rr(rrs);
+	}
+
+	return 0;
+}
+
+int compare_zones(knot_zone_contents_t *zone,
+                  ldns_rr_list *ldns_list, char verbose)
+{
+	/* TODO currently test fail when encountering first error -
+	 * it should finish going through the zone */
+	knot_rrset_t *tmp_rrset = NULL;
+
+	knot_dname_t *tmp_dname = NULL;
+
+	knot_node_t *node = NULL;
+
+	ldns_rr_list *ldns_rrset = ldns_rr_list_pop_rrset(ldns_list);
+
+	if (ldns_rrset == NULL) {
+		diag("Error: empty node");
+		return 1;
+	}
+
+	ldns_rr *rr = NULL;
+
+	/*
+	 * Following cycle works like this: First, we get RR from ldns rrset,
+	 * then we search for the node containing the rrset, then we get the
+	 * rrset, which is then compared with whole ldns rrset.
+	 */
+
+	/* ldns_rr_list_pop_rrset should pop the first rrset */
+	while (ldns_rrset != NULL) {
+		rr = ldns_rr_list_rr(ldns_rrset, 0);
+		tmp_dname =
+		knot_dname_new_from_wire(ldns_rdf_data(ldns_rr_owner(rr)),
+					   ldns_rdf_size(ldns_rr_owner(rr)),
+					   NULL);
+
+		node = knot_zone_contents_get_node(zone, tmp_dname);
+
+		if (node == NULL) {
+			node = knot_zone_contents_get_nsec3_node(zone,
+			                                         tmp_dname);
+		}
+
+		if (node == NULL) {
+			diag("Could not find node");
+			diag("%s", knot_dname_to_str(tmp_dname));
+			return 1;
+		}
+
+		knot_dname_free(&tmp_dname);
+
+		tmp_rrset = knot_node_get_rrset(node,
+				ldns_rr_get_type(ldns_rr_list_rr(ldns_rrset,
+								 0)));
+
+		if (tmp_rrset == NULL &&
+		    (uint)(ldns_rr_get_type(ldns_rr_list_rr(ldns_rrset, 0))) !=
+		    (uint)KNOT_RRTYPE_RRSIG) {
+			diag("Could not find rrset");
+			if (!verbose) {
+				return 1;
+			}
+			ldns_rr_list_print(stdout, ldns_rrset);
+			diag("%s", knot_dname_to_str(node->owner));
+			return 1;
+		} else if ((uint)(ldns_rr_get_type(ldns_rr_list_rr(ldns_rrset,
+		                                                  0))) ==
+			   (uint)KNOT_RRTYPE_RRSIG) {
+			knot_rrset_t *rrsigs = NULL;
+			/* read type covered from ldns rrset */
+			for (int i = 0; i < ldns_rrset->_rr_count; i++) {
+				uint16_t type_covered =
+				ldns_rdf_data(ldns_rr_rdf(
+					ldns_rr_list_rr(ldns_rrset, i), 0))[1];
+
+				/*
+				 * Dnslib stores RRSIGs separately -
+				 * we have to find get it from its "parent"
+				 * rrset.
+				 */
+
+				tmp_rrset = knot_node_get_rrset(node,
+								  type_covered);
+
+				if (tmp_rrset == NULL) {
+					if (!verbose) {
+						return 1;
+					}
+					diag("following rrset "
+					     "could not be found");
+					ldns_rr_list_print(stdout, ldns_rrset);
+					return 1;
+				}
+
+				if (rrsigs == NULL) {
+					rrsigs = tmp_rrset->rrsigs;
+				} else {
+					knot_rrset_merge((void *)&rrsigs,
+					(void *)&(tmp_rrset->rrsigs));
+				}
+			}
+			tmp_rrset = rrsigs;
+		}
+
+/*		diag("dnslib type: %d", tmp_rrset->type);
+		diag("dnslib dname: %s", tmp_rrset->owner->name);
+
+		diag("ldns type: %d",
+		     ldns_rr_get_type(ldns_rr_list_rr(ldns_rrset, 0)));
+		diag("ldns dname : %s", ldns_rdf_data(ldns_rr_owner(
+				ldns_rr_list_rr(ldns_rrset, 0)))); */
+
+//		knot_rrset_dump(tmp_rrset, 1);
+
+		if (compare_rrset_w_ldns_rrset(tmp_rrset, ldns_rrset,
+					       1, 0) != 0) {
+			diag("RRSets did not match");
+//			knot_rrset_dump(tmp_rrset, 1);
+			return 1;
+		}
+
+		ldns_rr_list_deep_free(ldns_rrset);
+
+		ldns_rrset = ldns_rr_list_pop_rrset(ldns_list);
+
+		if (ldns_rrset == NULL) {
+			ldns_rrset = ldns_rr_list_pop_rrset(ldns_list);
+		}
+	}
+
+	return 0;
+}
+
+#endif
+
+static int test_zoneparser_zone_read(const char *origin, const char *filename,
+				     const char *outfile)
+{
+#ifndef TEST_WITH_LDNS
+	diag("Zoneparser tests without usage of ldns are not implemented");
+	return 0;
+#endif
+
+#ifdef TEST_WITH_LDNS
+	/* Calls zcompile. */
+	parser = zparser_create();
+	int ret = zone_read(origin, filename, outfile, 0);
+	if (ret != 0) {
+		diag("Could not load zone from file: %s", filename);
+		return 0;
+	}
+
+	knot_zone_t *dnsl_zone = NULL;
+	zloader_t *loader = NULL;
+	if (knot_zload_open(&loader, outfile) != 0) {
+		diag("Could not create zone loader.\n");
+		return 0;
+	}
+	dnsl_zone = knot_zload_load(loader);
+	remove(outfile);
+	if (!dnsl_zone) {
+		diag("Could not load dumped zone.\n");
+		return 0;
+	}
+
+	ldns_zone *ldns_zone = NULL;
+	FILE *f = fopen(filename, "r");
+	if (ldns_zone_new_frm_fp(&ldns_zone, f, NULL,
+				  0, LDNS_RR_CLASS_IN) != LDNS_STATUS_OK) {
+		diag("Could not load zone from file: %s (ldns)", filename);
+		return 0;
+	}
+
+//	ldns_zone_sort(ldns_zone);
+
+	/*
+	 * LDNS stores SOA record independently - create a list with all
+	 * records in it.
+	 */
+
+	ldns_rr_list *ldns_list = ldns_zone_rrs(ldns_zone);
+
+	ldns_rr_list_push_rr(ldns_list, ldns_zone_soa(ldns_zone));
+
+	if (compare_zones(dnsl_zone->contents, ldns_list, 0) != 0) {
+		return 0;
+	}
+
+	knot_zone_deep_free(&dnsl_zone, 0);
+	ldns_zone_free(ldns_zone);
+	fclose(f);
+	return 1;
+#endif
+}
+
+static const int ZONEPARSER_TEST_COUNT = 1;
+
+/*! API: return number of tests. */
+static int zoneparser_tests_count(int argc, char *argv[])
+{
+	return ZONEPARSER_TEST_COUNT;
+}
+
+/*! API: run tests. */
+static int zoneparser_tests_run(int argc, char *argv[])
+{
+	if (argc == 3) {
+		ok(test_zoneparser_zone_read(argv[1], argv[2],
+					     "foo_test_zone"),
+					     "zoneparser: read (%s)",
+		   argv[2]);
+	} else {
+		diag("Wrong parameters\n usage: "
+		     "knot-zcompile-unittests origin zonefile");
+		return 0;
+	}
+	return 1;
+}
diff --git a/src/zcompile/zcompile-error.c b/src/zcompile/zcompile-error.c
new file mode 100644
index 0000000..9357cde
--- /dev/null
+++ b/src/zcompile/zcompile-error.c
@@ -0,0 +1,52 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "zcompile/zcompile-error.h"
+
+#include "common/errors.h"
+
+/*! \brief Table linking error messages to error codes. */
+const error_table_t knot_zcompile_error_msgs[KNOTDZCOMPILE_ERROR_COUNT] = {
+
+	/* Mapped errors. */
+	{KNOTDZCOMPILE_EOK, "OK"},
+	{KNOTDZCOMPILE_ENOMEM, "Not enough memory."},
+	{KNOTDZCOMPILE_EINVAL, "Invalid parameter passed."},
+	{KNOTDZCOMPILE_ENOTSUP, "Parameter not supported."},
+	{KNOTDZCOMPILE_EBUSY, "Requested resource is busy."},
+	{KNOTDZCOMPILE_EAGAIN,
+	 "The system lacked the necessary resource, try again."},
+	{KNOTDZCOMPILE_EACCES,
+	 "Permission to perform requested operation is denied."},
+	{KNOTDZCOMPILE_ECONNREFUSED, "Connection is refused."},
+	{KNOTDZCOMPILE_EISCONN, "Already connected."},
+	{KNOTDZCOMPILE_EADDRINUSE, "Address already in use."},
+	{KNOTDZCOMPILE_ENOENT, "Resource not found."},
+	{KNOTDZCOMPILE_ERANGE, "Value is out of range."},
+
+	/* Custom errors. */
+	{KNOTDZCOMPILE_ERROR, "Generic error."},
+	{KNOTDZCOMPILE_EBRDATA, "Malformed RDATA."},
+	{KNOTDZCOMPILE_ESOA, "Multiple SOA records."},
+	{KNOTDZCOMPILE_EBADSOA, "SOA record has different owner "
+	 "than in config - parser will not continue!"},
+	{KNOTDZCOMPILE_EBADNODE, "Error handling node."},
+	{KNOTDZCOMPILE_EZONEINVAL, "Invalid zone file."},
+	{KNOTDZCOMPILE_EPARSEFAIL, "Parser failed."},
+	{KNOTDZCOMPILE_ENOIPV6, "IPv6 support disabled."},
+	{KNOTDZCOMPILE_ESYNT, "Parser syntactic error."},
+	{KNOTDZCOMPILE_ERROR, 0}
+};
diff --git a/src/zcompile/zcompile-error.h b/src/zcompile/zcompile-error.h
new file mode 100644
index 0000000..c6d999c
--- /dev/null
+++ b/src/zcompile/zcompile-error.h
@@ -0,0 +1,90 @@
+/*!
+ * \file zcompile-error.h
+ *
+ * \author Lubos Slovak <lubos.slovak@nic.cz>
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ * \author Jan Kadlec <jan.kadlec@nic.cz>
+ *
+ * \brief Error codes and function for getting error message.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KNOTD_ZCOMPILE_ERROR_H_
+#define _KNOTD_ZCOMPILE_ERROR_H_
+
+#include "common/errors.h"
+
+/*!
+ * \brief Error codes used in the server.
+ *
+ * Some viable errors are directly mapped
+ * to libc errno codes.
+ */
+enum knot_zcompile_error {
+
+	/* Directly mapped error codes. */
+	KNOTDZCOMPILE_EOK = 0,
+	KNOTDZCOMPILE_ENOMEM = -ENOMEM, /*!< \brief Out of memory. */
+	KNOTDZCOMPILE_EINVAL = -EINVAL, /*!< \brief Invalid parameter passed. */
+	/*!
+	 * \brief Parameter not supported.
+	 */
+	KNOTDZCOMPILE_ENOTSUP = -ENOTSUP,
+	KNOTDZCOMPILE_EBUSY = -EBUSY, /*!< \brief Requested resource is busy. */
+	/*!
+	 * \brief OS lacked necessary resources.
+	 */
+	KNOTDZCOMPILE_EAGAIN = -EAGAIN,
+	KNOTDZCOMPILE_EACCES = -EACCES, /*!< \brief Permission is denied. */
+	/*!
+	 * \brief Connection is refused.
+	 */
+	KNOTDZCOMPILE_ECONNREFUSED = -ECONNREFUSED,
+	KNOTDZCOMPILE_EISCONN = -EISCONN, /*!< \brief Already connected. */
+	/*!
+	 * \brief Address already in use.
+	 */
+	KNOTDZCOMPILE_EADDRINUSE = -EADDRINUSE,
+	KNOTDZCOMPILE_ENOENT = -ENOENT, /*!< \brief Resource not found. */
+	KNOTDZCOMPILE_ERANGE = -ERANGE, /*!< \brief Value is out of range. */
+
+	/* Custom error codes. */
+	KNOTDZCOMPILE_ERROR = -16384, /*!< \brief Generic error. */
+	KNOTDZCOMPILE_ESYNT, /*!< \brief Syntax error. */
+	KNOTDZCOMPILE_EBADNODE, /*!< \brief Node error. */
+	KNOTDZCOMPILE_EBRDATA, /*!< \brief RDATA error. */
+	KNOTDZCOMPILE_EBADSOA, /*!< \brief SOA owner error. */
+	KNOTDZCOMPILE_ESOA, /*!< \brief Multiple SOA records. */
+
+	KNOTDZCOMPILE_EZONEINVAL, /*!< \brief Invalid zone file. */
+	KNOTDZCOMPILE_EPARSEFAIL, /*!< \brief Parser fail. */
+	KNOTDZCOMPILE_ENOIPV6, /*! \brief No IPv6 support. */
+
+	KNOTDZCOMPILE_ERROR_COUNT = 22
+};
+
+typedef enum knot_zcompile_error knot_zcompile_error_t;
+
+/*! \brief Table linking error messages to error codes. */
+extern const error_table_t knot_zcompile_error_msgs[KNOTDZCOMPILE_ERROR_COUNT];
+
+#endif /* _KNOTD_ZCOMPILE_ERROR_H_ */
+
+/*! @} */
diff --git a/src/zcompile/zcompile.c b/src/zcompile/zcompile.c
new file mode 100644
index 0000000..ec3cbe2
--- /dev/null
+++ b/src/zcompile/zcompile.c
@@ -0,0 +1,639 @@
+/*!
+ * \file zcompile.c
+ *
+ * \author Jan Kadlec <jan.kadlec@nic.cz>. Minor portions of code taken from
+ *         NSD.
+ *
+ * \brief Zone compiler.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "common/base32hex.h"
+#include "zcompile/zcompile.h"
+#include "zcompile/parser-util.h"
+#include "knot/zone/zone-dump-text.h"
+#include "zparser.h"
+#include "zcompile/zcompile-error.h"
+#include "knot/zone/zone-dump.h"
+#include "libknot/libknot.h"
+#include "libknot/util/utils.h"
+
+/* Some global flags... */
+static int vflag = 0;
+/* if -v then print progress each 'progress' RRs */
+static int progress = 10000;
+
+/* Total errors counter */
+static long int totalerrors = 0;
+static long int totalrrs = 0;
+
+extern FILE *zp_get_in(void *scanner);
+
+//#define ZP_DEBUG
+
+#ifdef ZP_DEBUG
+#define dbg_zp(msg...) fprintf(stderr, msg)
+#else
+#define dbg_zp(msg...)
+#endif
+
+/*!
+ * \brief Adds RRSet to list.
+ *
+ * \param head Head of list.
+ * \param rrsig RRSet to be added.
+ */
+static int rrset_list_add(rrset_list_t **head, knot_rrset_t *rrsig)
+{
+	if (*head == NULL) {
+		*head = malloc(sizeof(rrset_list_t));
+		if (*head == NULL) {
+			ERR_ALLOC_FAILED;
+			return KNOTDZCOMPILE_ENOMEM;
+		}
+		(*head)->next = NULL;
+		(*head)->data = rrsig;
+	} else {
+		rrset_list_t *tmp = malloc(sizeof(*tmp));
+		if (tmp == NULL) {
+			ERR_ALLOC_FAILED;
+			return KNOTDZCOMPILE_ENOMEM;
+		}
+		tmp->next = *head;
+		tmp->data = rrsig;
+		*head = tmp;
+	}
+
+	return KNOTDZCOMPILE_EOK;
+}
+
+/*!
+ * \brief Deletes RRSet list. Sets pointer to NULL.
+ *
+ * \param head Head of list to be deleted.
+ */
+static void rrset_list_delete(rrset_list_t **head)
+{
+	rrset_list_t *tmp;
+	if (*head == NULL) {
+		return;
+	}
+
+	while (*head != NULL) {
+		tmp = *head;
+		*head = (*head)->next;
+		free(tmp);
+	}
+
+	*head = NULL;
+}
+
+static int find_rrset_for_rrsig_in_zone(knot_zone_contents_t *zone,
+                                        knot_rrset_t *rrsig)
+{
+	assert(rrsig != NULL);
+	assert(rrsig->rdata->items[0].raw_data);
+
+	knot_node_t *tmp_node = NULL;
+
+	if (rrsig->type != KNOT_RRTYPE_NSEC3) {
+		tmp_node = knot_zone_contents_get_node(zone, rrsig->owner);
+	} else {
+		tmp_node = knot_zone_contents_get_nsec3_node(zone,
+						      rrsig->owner);
+	}
+
+	if (tmp_node == NULL) {
+		return KNOTDZCOMPILE_EINVAL;
+	}
+
+	knot_rrset_t *tmp_rrset =
+		knot_node_get_rrset(tmp_node, rrsig->type);
+
+	if (tmp_rrset == NULL) {
+		return KNOTDZCOMPILE_EINVAL;
+	}
+
+	if (tmp_rrset->rrsigs != NULL) {
+		knot_zone_contents_add_rrsigs(zone, rrsig, &tmp_rrset, &tmp_node,
+		                       KNOT_RRSET_DUPL_MERGE, 1);
+		knot_rrset_free(&rrsig);
+	} else {
+		knot_zone_contents_add_rrsigs(zone, rrsig, &tmp_rrset, &tmp_node,
+		                       KNOT_RRSET_DUPL_SKIP, 1);
+	}
+
+	return KNOTDZCOMPILE_EOK;
+}
+
+static int find_rrset_for_rrsig_in_node(knot_zone_contents_t *zone,
+                                 knot_node_t *node,
+                                 knot_rrset_t *rrsig)
+{
+	assert(rrsig != NULL);
+	assert(rrsig->rdata->items[0].raw_data);
+	assert(node);
+
+	assert(knot_dname_compare(rrsig->owner, node->owner) == 0);
+
+	knot_rrset_t *tmp_rrset =
+		knot_node_get_rrset(node, rrsig_type_covered(rrsig));
+
+	if (tmp_rrset == NULL) {
+		return KNOTDZCOMPILE_EINVAL;
+	}
+
+	if (tmp_rrset->rrsigs != NULL) {
+		if (knot_zone_contents_add_rrsigs(zone, rrsig, &tmp_rrset, &node,
+		                           KNOT_RRSET_DUPL_MERGE, 1) < 0) {
+			return KNOTDZCOMPILE_EINVAL;
+		}
+		knot_rrset_free(&rrsig);
+	} else {
+		if (knot_zone_contents_add_rrsigs(zone, rrsig, &tmp_rrset, &node,
+		                           KNOT_RRSET_DUPL_SKIP, 1) < 0) {
+			return KNOTDZCOMPILE_EINVAL;
+		}
+	}
+
+	assert(tmp_rrset->rrsigs != NULL);
+
+	return KNOTDZCOMPILE_EOK;
+}
+
+static knot_node_t *create_node(knot_zone_contents_t *zone,
+	knot_rrset_t *current_rrset,
+	int (*node_add_func)(knot_zone_contents_t *zone, knot_node_t *node,
+	                     int create_parents, uint8_t, int),
+	knot_node_t *(*node_get_func)(const knot_zone_contents_t *zone,
+					const knot_dname_t *owner))
+{
+	knot_node_t *node =
+		knot_node_new(current_rrset->owner, NULL, 0);
+	if (node_add_func(zone, node, 1, 0, 1) != 0) {
+		return NULL;
+	}
+
+	current_rrset->owner = node->owner;
+
+	return node;
+}
+
+static void process_rrsigs_in_node(knot_zone_contents_t *zone,
+                            knot_node_t *node)
+{
+	rrset_list_t *tmp = parser->node_rrsigs;
+	while (tmp != NULL) {
+		if (find_rrset_for_rrsig_in_node(zone, node,
+						 tmp->data) != 0) {
+			rrset_list_add(&parser->rrsig_orphans,
+				       tmp->data);
+			parser->rrsig_orphan_count++;
+		}
+		tmp = tmp->next;
+	}
+}
+
+int process_rr(void)
+{
+	knot_zone_t *zone = parser->current_zone;
+	assert(zone != NULL);
+	knot_zone_contents_t *contents = knot_zone_get_contents(zone);
+	assert(contents != NULL);
+	knot_rrset_t *current_rrset = parser->current_rrset;
+	knot_rrset_t *rrset;
+	knot_rrtype_descriptor_t *descriptor =
+		knot_rrtype_descriptor_by_type(current_rrset->type);
+
+	dbg_zp("%s\n", knot_dname_to_str(parser->current_rrset->owner));
+	dbg_zp("type: %s\n", knot_rrtype_to_string(parser->current_rrset->type));
+	dbg_zp("rdata count: %d\n", parser->current_rrset->rdata->count);
+//	hex_print(parser->current_rrset->rdata->items[0].raw_data,
+//	          parser->current_rrset->rdata->items[0].raw_data[0]);
+
+	if (descriptor->fixed_items) {
+		assert(current_rrset->rdata->count == descriptor->length);
+	}
+
+	assert(current_rrset->rdata->count > 0);
+
+	assert(knot_dname_is_fqdn(current_rrset->owner));
+
+	int (*node_add_func)(knot_zone_contents_t *, knot_node_t *, int,
+	                     uint8_t, int);
+	knot_node_t *(*node_get_func)(const knot_zone_contents_t *,
+	                                const knot_dname_t *);
+
+
+	/* If we have RRSIG of NSEC3 type first node will have
+	 * to be created in NSEC3 part of the zone */
+
+	uint16_t type_covered = 0;
+	if (current_rrset->type == KNOT_RRTYPE_RRSIG) {
+		type_covered = rrsig_type_covered(current_rrset);
+	}
+
+	if (current_rrset->type != KNOT_RRTYPE_NSEC3 &&
+	    type_covered != KNOT_RRTYPE_NSEC3) {
+		node_add_func = &knot_zone_contents_add_node;
+		node_get_func = &knot_zone_contents_get_node;
+	} else {
+		node_add_func = &knot_zone_contents_add_nsec3_node;
+		node_get_func = &knot_zone_contents_get_nsec3_node;
+	}
+
+	if ((current_rrset->type == KNOT_RRTYPE_SOA) && (zone != NULL)) {
+		if (knot_node_rrset(knot_zone_contents_apex(contents),
+		                      KNOT_RRTYPE_SOA) != NULL) {
+			/* Receiving another SOA. */
+			if (!knot_rrset_compare(current_rrset,
+			    knot_node_rrset(knot_zone_contents_apex(contents),
+			    KNOT_RRTYPE_SOA), KNOT_RRSET_COMPARE_WHOLE)) {
+				return KNOTDZCOMPILE_ESOA;
+			} else {
+				zc_warning_prev_line("encountered identical "
+				                     "extra SOA record");
+				return KNOTDZCOMPILE_EOK;
+			}
+		}
+	}
+
+	/*!< \todo Make sure the maximum RDLENGTH does not exceed 65535 bytes.*/
+
+	if (current_rrset->type == KNOT_RRTYPE_SOA) {
+		if (knot_dname_compare(current_rrset->owner,
+					 parser->origin_from_config) != 0) {
+			zc_error_prev_line("SOA record has a different "
+				"owner than the one specified "
+				"in config! \n");
+			/* Such SOA cannot even be added, because
+			 * it would not be in the zone apex. */
+			return KNOTDZCOMPILE_EBADSOA;
+		}
+	}
+
+	if (current_rrset->type == KNOT_RRTYPE_RRSIG) {
+		/*!< \todo Still a leak somewhere. */
+		knot_rrset_t *tmp_rrsig =
+			knot_rrset_new(current_rrset->owner,
+					     KNOT_RRTYPE_RRSIG,
+					     current_rrset->rclass,
+					     current_rrset->ttl);
+		if (tmp_rrsig == NULL) {
+			return KNOTDZCOMPILE_ENOMEM;
+		}
+
+		if (knot_rrset_add_rdata(tmp_rrsig,
+		                           current_rrset->rdata) != 0) {
+			return KNOTDZCOMPILE_EBRDATA;
+		}
+
+		if (parser->last_node &&
+		    knot_dname_compare(parser->last_node->owner,
+		                         current_rrset->owner) != 0) {
+			/* RRSIG is first in the node, so we have to create it
+			 * before we return
+			 */
+			if (parser->node_rrsigs != NULL) {
+				process_rrsigs_in_node(contents,
+				                       parser->last_node);
+				rrset_list_delete(&parser->node_rrsigs);
+			}
+
+			if ((parser->last_node = create_node(contents,
+						   current_rrset, node_add_func,
+						   node_get_func)) == NULL) {
+				knot_rrset_free(&tmp_rrsig);
+				return KNOTDZCOMPILE_EBADNODE;
+			}
+		}
+
+		if (rrset_list_add(&parser->node_rrsigs, tmp_rrsig) != 0) {
+			return KNOTDZCOMPILE_ENOMEM;
+		}
+
+		return KNOTDZCOMPILE_EOK;
+	}
+
+	assert(current_rrset->type != KNOT_RRTYPE_RRSIG);
+
+	knot_node_t *node = NULL;
+	/* \note this could probably be much simpler */
+	if (parser->last_node && current_rrset->type != KNOT_RRTYPE_SOA &&
+	    knot_dname_compare(parser->last_node->owner,
+				 current_rrset->owner) ==
+	    0) {
+		node = parser->last_node;
+	} else {
+		if (parser->last_node && parser->node_rrsigs) {
+			process_rrsigs_in_node(contents,
+			                       parser->last_node);
+		}
+
+		rrset_list_delete(&parser->node_rrsigs);
+
+		/* new node */
+		node = node_get_func(contents, current_rrset->owner);
+	}
+
+	if (node == NULL) {
+		if (parser->last_node && parser->node_rrsigs) {
+			process_rrsigs_in_node(contents,
+			                       parser->last_node);
+		}
+
+		if ((node = create_node(contents, current_rrset,
+					node_add_func,
+					node_get_func)) == NULL) {
+			return KNOTDZCOMPILE_EBADNODE;
+		}
+	}
+
+	rrset = knot_node_get_rrset(node, current_rrset->type);
+	if (!rrset) {
+		rrset = knot_rrset_new(current_rrset->owner,
+					 current_rrset->type,
+					 current_rrset->rclass,
+					 current_rrset->ttl);
+		if (rrset == NULL) {
+			return KNOTDZCOMPILE_ENOMEM;
+		}
+
+		if (knot_rrset_add_rdata(rrset, current_rrset->rdata) != 0) {
+			free(rrset);
+			return KNOTDZCOMPILE_EBRDATA;
+		}
+
+		/* I chose skip, but there should not really be
+		 * any rrset to skip */
+		if (knot_zone_contents_add_rrset(contents, rrset, &node,
+		                   KNOT_RRSET_DUPL_SKIP, 1) < 0) {
+			free(rrset);
+			return KNOTDZCOMPILE_EBRDATA;
+		}
+	} else {
+		if (current_rrset->type !=
+				KNOT_RRTYPE_RRSIG && rrset->ttl !=
+				current_rrset->ttl) {
+			zc_error_prev_line(
+				"TTL does not match the TTL of the RRset");
+		}
+
+		if (knot_zone_contents_add_rrset(contents, current_rrset,
+		                          &node,
+		                   KNOT_RRSET_DUPL_MERGE, 1) < 0) {
+			return KNOTDZCOMPILE_EBRDATA;
+		}
+	}
+
+	if (vflag > 1 && totalrrs > 0 && (totalrrs % progress == 0)) {
+		zc_error_prev_line("Total errors: %ld\n", totalrrs);
+	}
+
+	parser->last_node = node;
+
+	++totalrrs;
+
+	return KNOTDZCOMPILE_EOK;
+}
+
+static uint find_rrsets_orphans(knot_zone_contents_t *zone, rrset_list_t
+				*head)
+{
+	uint found_rrsets = 0;
+	while (head != NULL) {
+		if (find_rrset_for_rrsig_in_zone(zone, head->data) == 0) {
+			found_rrsets += 1;
+			dbg_zp("RRSET succesfully found: owner %s type %s\n",
+				 knot_dname_to_str(head->data->owner),
+				 knot_rrtype_to_string(head->data->type));
+		}
+		else { /* we can throw it away now */
+			knot_rrset_free(&head->data);
+		}
+		head = head->next;
+	}
+	return found_rrsets;
+}
+
+/*
+ *
+ * Opens a zone file.
+ *
+ * Returns:
+ *
+ *	- pointer to the parser structure
+ *	- NULL on error and errno set
+ *
+ */
+static int zone_open(const char *filename, uint32_t ttl, uint16_t rclass,
+	  knot_node_t *origin, void *scanner, knot_dname_t *origin_from_config)
+{
+	/* Open the zone file... */
+	if (strcmp(filename, "-") == 0) {
+		zp_set_in(stdin, scanner);
+		filename = "<stdin>";
+	} else {
+		FILE *f = fopen(filename, "r");
+		if (f == NULL) {
+			return 0;
+		}
+		zp_set_in(f, scanner);
+		if (zp_get_in(scanner) == 0) {
+			return 0;
+		}
+	}
+
+//	int fd = fileno(zp_get_in(scanner));
+//	if (fd == -1) {
+//		return 0;
+//	}
+
+//	if (fcntl(fd, F_SETLK, knot_file_lock(F_RDLCK, SEEK_SET)) == -1) {
+//		fprintf(stderr, "Could not lock zone file for read!\n");
+//		return 0;
+//	}
+
+	zparser_init(filename, ttl, rclass, origin, origin_from_config);
+
+	return 1;
+}
+
+/*
+ * Reads the specified zone into the memory
+ *
+ */
+int zone_read(const char *name, const char *zonefile, const char *outfile,
+	      int semantic_checks)
+{
+	if (!outfile) {
+		zc_error_prev_line("Missing output file for '%s'\n",
+			zonefile);
+		return KNOTDZCOMPILE_EINVAL;
+	}
+
+	/* Check that we can write to outfile. */
+	FILE *f = fopen(outfile, "wb");
+	if (f == NULL) {
+		fprintf(stderr, "Cannot write zone db to file '%s'\n",
+		       outfile);
+		return KNOTDZCOMPILE_EINVAL;
+	}
+	fclose(f);
+
+
+//	char ebuf[256];
+
+	knot_dname_t *dname =
+		knot_dname_new_from_str(name, strlen(name), NULL);
+	if (dname == NULL) {
+		return KNOTDZCOMPILE_ENOMEM;
+	}
+
+	knot_node_t *origin_node = knot_node_new(dname, NULL, 0);
+
+	/*!< \todo Another copy is probably not needed. */
+	knot_dname_t *origin_from_config =
+		knot_dname_new_from_str(name, strlen(name), NULL);
+	if (origin_from_config == NULL) {
+		return KNOTDZCOMPILE_ENOMEM;
+	}
+
+	//assert(origin_node->next == NULL);
+
+	assert(knot_node_parent(origin_node, 0) == NULL);
+	if (origin_node == NULL) {
+		knot_dname_release(dname);
+		return KNOTDZCOMPILE_ENOMEM;
+	}
+
+	void *scanner = NULL;
+	zp_lex_init(&scanner);
+	if (scanner == NULL) {
+		return KNOTDZCOMPILE_ENOMEM;
+	}
+
+	if (!zone_open(zonefile, 3600, KNOT_CLASS_IN, origin_node, scanner,
+	               origin_from_config)) {
+		zc_error_prev_line("Cannot open '%s'\n",
+			zonefile);
+		zparser_free();
+		return KNOTDZCOMPILE_EZONEINVAL;
+	}
+
+	if (zp_parse(scanner) != 0) {
+//		int fd = fileno(zp_get_in(scanner));
+//		if (fcntl(fd, F_SETLK,
+//		          knot_file_lock(F_UNLCK, SEEK_SET)) == -1) {
+//			return KNOTDZCOMPILE_EACCES;
+//		}
+
+		FILE *in_file = (FILE *)zp_get_in(scanner);
+		fclose(in_file);
+		zp_lex_destroy(scanner);
+
+		return KNOTDZCOMPILE_ESYNT;
+	}
+
+	knot_zone_contents_t *contents =
+			knot_zone_get_contents(parser->current_zone);
+
+	FILE *in_file = (FILE *)zp_get_in(scanner);
+	fclose(in_file);
+	zp_lex_destroy(scanner);
+
+	/* Unlock zone file. */
+//	int fd = fileno(zp_get_in(scanner));
+//	if (fcntl(fd, F_SETLK, knot_file_lock(F_UNLCK, SEEK_SET)) == -1) {
+//		fprintf(stderr, "Could not lock zone file for read!\n");
+//		return 0;
+//	}
+
+	dbg_zp("zp complete %p\n", parser->current_zone);
+
+	if (parser->last_node && parser->node_rrsigs != NULL) {
+		/* assign rrsigs to last node in the zone*/
+		process_rrsigs_in_node(contents,
+		                       parser->last_node);
+		rrset_list_delete(&parser->node_rrsigs);
+	}
+
+	dbg_zp("zone parsed\n");
+
+	if (!(parser->current_zone &&
+	      knot_node_rrset(parser->current_zone->contents->apex,
+	                        KNOT_RRTYPE_SOA))) {
+		zc_error_prev_line("Zone file does not contain SOA record!\n");
+		knot_zone_deep_free(&parser->current_zone, 1);
+		zparser_free();
+		return KNOTDZCOMPILE_EZONEINVAL;
+	}
+
+	uint found_orphans;
+	found_orphans = find_rrsets_orphans(contents,
+					    parser->rrsig_orphans);
+
+	dbg_zp("%u orphans found\n", found_orphans);
+
+	rrset_list_delete(&parser->rrsig_orphans);
+
+	if (found_orphans != parser->rrsig_orphan_count) {
+		fprintf(stderr,
+		        "There are unassigned RRSIGs in the zone!\n");
+		parser->errors++;
+	}
+
+	knot_zone_contents_adjust(contents, 0);
+
+	dbg_zp("rdata adjusted\n");
+
+	if (parser->errors != 0) {
+		fprintf(stderr,
+		        "Parser finished with error, not dumping the zone!\n");
+	} else {
+		if (knot_zdump_binary(contents,
+		                      outfile, semantic_checks,
+		                      zonefile) != 0) {
+			fprintf(stderr, "Could not dump zone!\n");
+			totalerrors++;
+		}
+		dbg_zp("zone dumped.\n");
+	}
+
+	/* This is *almost* unnecessary */
+	knot_zone_deep_free(&(parser->current_zone), 1);
+
+	fflush(stdout);
+	totalerrors += parser->errors;
+	zparser_free();
+
+	return totalerrors;
+}
+
+/*! @} */
diff --git a/src/zcompile/zcompile.h b/src/zcompile/zcompile.h
new file mode 100644
index 0000000..33dd3ee
--- /dev/null
+++ b/src/zcompile/zcompile.h
@@ -0,0 +1,207 @@
+/*!
+ * \file zoneparser.h
+ *
+ * \author modifications by Jan Kadlec <jan.kadlec@nic.cz>, most of the code
+ *         by NLnet Labs.
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief Zone compiler.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _KNOTD_ZONEPARSER_H_
+#define _KNOTD_ZONEPARSER_H_
+
+#include <stdio.h>
+
+#include "libknot/dname.h"
+#include "libknot/rrset.h"
+#include "libknot/zone/node.h"
+#include "libknot/rdata.h"
+#include "libknot/zone/zone.h"
+#include "libknot/zone/dname-table.h"
+#include "libknot/zone/dname-table.h"
+#include "common/slab/slab.h"
+
+#define MAXRDATALEN	64	/*!< Maximum number of RDATA items. */
+#define MAXLABELLEN	63	/*!< Maximum label length. */
+#define MAXDOMAINLEN	255	/*!< Maximum domain name length */
+#define MAX_RDLENGTH	65535	/*!< Maximum length of RDATA item */
+#define	MAXTOKENSLEN	512	/*!< Maximum number of tokens per entry. */
+#define	B64BUFSIZE	65535	/*!< Buffer size for b64 conversion. */
+#define	ROOT		(const uint8_t *)"\001" /*!< Root domain name. */
+
+#define NSEC_WINDOW_COUNT     256	/*!< Number of NSEC windows. */
+#define NSEC_WINDOW_BITS_COUNT 256	/*!< Number of bits in NSEC window. */
+/*! \brief Size of NSEC window in bytes. */
+#define NSEC_WINDOW_BITS_SIZE  (NSEC_WINDOW_BITS_COUNT / 8)
+
+/*
+ * RFC 4025 - codes for different types that IPSECKEY can hold.
+ */
+#define IPSECKEY_NOGATEWAY      0
+#define IPSECKEY_IP4            1
+#define IPSECKEY_IP6            2
+#define IPSECKEY_DNAME          3
+
+#define LINEBUFSZ 1024	/*!< Buffer size for one line in zone file. */
+
+struct lex_data {
+    size_t   len;		/*!< holds the label length */
+    char    *str;		/*!< holds the data */
+};
+
+#define DEFAULT_TTL 3600
+
+int yylex_destroy(void *scanner);
+int zp_parse(void *scanner);
+void zp_set_in(FILE *f, void *scanner);
+int zp_lex_init(void **scanner);
+int zp_lex_destroy(void *scanner);
+
+/*! \todo Implement ZoneDB. */
+typedef void namedb_type;
+
+/*!
+ * \brief One-purpose linked list holding pointers to RRSets.
+ */
+struct rrset_list {
+	knot_rrset_t *data; /*!< List data. */
+	struct rrset_list *next; /*!< Next node. */
+};
+
+typedef struct rrset_list rrset_list_t;
+
+/*!
+ * \brief Main zoneparser structure.
+ */
+struct zparser {
+	const char *filename; /*!< File with zone. */
+	uint32_t default_ttl; /*!< Default TTL. */
+	uint16_t default_class; /*!< Default class. */
+	knot_zone_t *current_zone; /*!< Current zone. */
+	knot_node_t *origin; /*!< Origin node. */
+	knot_dname_t *prev_dname; /*!< Previous dname. */
+	knot_dname_t *origin_from_config; /*!< Zone origin from config. */
+	knot_node_t *default_apex; /*!< Zone default apex. */
+
+	knot_node_t *last_node; /*!< Last processed node. */
+
+	char *dname_str; /*!< Temporary dname. */
+
+	int error_occurred; /*!< Error occured flag */
+	unsigned int errors; /*!< Number of errors. */
+	unsigned int line; /*!< Current line */
+
+	knot_rrset_t *current_rrset; /*!< Current RRSet. */
+	knot_rdata_item_t *temporary_items; /*!< Temporary rdata items. */
+
+	/*!
+	 * \brief list of RRSIGs that were not inside their nodes in zone file
+	 */
+	rrset_list_t *rrsig_orphans;
+	unsigned long rrsig_orphan_count; /*!< RRSIG orphan count */
+
+	knot_dname_t *root_domain; /*!< Root domain name. */
+	slab_cache_t *parser_slab; /*!< Slab for parser. */
+	rrset_list_t *node_rrsigs; /*!< List of RRSIGs in current node. */
+
+	int rdata_count; /*!< Count of parsed rdata. */
+};
+
+typedef struct zparser zparser_type;
+
+extern zparser_type *parser;
+
+extern void zc_error_prev_line(const char *fmt, ...);
+
+/* used in zonec.lex */
+
+void zc_error_prev_line(const char *fmt, ...);
+void zc_warning_prev_line(const char *fmt, ...);
+
+/*!
+ * \brief Does all the processing of RR - saves to zone, assigns RRSIGs etc.
+ */
+int process_rr();
+
+/*!
+ * \brief Parses and creates zone from given file.
+ *
+ * \param name Origin domain name string.
+ * \param zonefile File containing the zone.
+ * \param outfile File to save dump of the zone to.
+ * \param semantic_checks Enables or disables sematic checks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int zone_read(const char *name, const char *zonefile, const char *outfile,
+              int semantic_checks);
+
+/*!
+ * \brief Creates zparser instance.
+ *
+ *
+ * \return Created zparser instance.
+ */
+zparser_type *zparser_create();
+
+/*!
+ * \brief Inits zoneparser structure.
+ *
+ * \param filename Name of file with zone.
+ * \param ttl Default TTL.
+ * \param rclass Default class.
+ * \param origin Zone origin.
+ */
+void zparser_init(const char *filename, uint32_t ttl, uint16_t rclass,
+		  knot_node_t *origin, knot_dname_t *owner_from_config);
+
+/*!
+ * \brief Frees zoneparser structure.
+ *
+ */
+void zparser_free();
+
+int save_dnames_in_table(knot_dname_table_t *table,
+                         knot_rrset_t *rrset);
+
+#endif /* _KNOTD_ZONEPARSER_H_ */
+
+/*! @} */
diff --git a/src/zcompile/zcompile_main.c b/src/zcompile/zcompile_main.c
new file mode 100644
index 0000000..cb862f8
--- /dev/null
+++ b/src/zcompile/zcompile_main.c
@@ -0,0 +1,116 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "zcompile/zcompile.h"
+#include "zcompile/zcompile-error.h"
+#include "common/errors.h"
+#include <config.h>
+
+static void help(int argc, char **argv)
+{
+	printf("Usage: %s [parameters] origin zonefile\n",
+	       argv[0]);
+	printf("Parameters:\n"
+	       " -o <outfile> Override output file.\n"
+	       " -v           Verbose mode - additional runtime information.\n"
+	       " -s           Enable semantic checks.\n"
+	       " -V           Print version of the server.\n"
+	       " -h           Print help and usage.\n");
+}
+
+int main(int argc, char **argv)
+{
+	// Parse command line arguments
+	int c = 0;
+	int verbose = 0;
+	int semantic_checks = 0;
+	const char* origin = 0;
+	const char* zonefile = 0;
+	const char* outfile = 0;
+	while ((c = getopt (argc, argv, "o:vVsh")) != -1) {
+		switch (c)
+		{
+		case 'o':
+			outfile = optarg;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'V':
+			printf("%s, version %s\n", "Knot DNS", PACKAGE_VERSION);
+			return 0;
+		case 's':
+			semantic_checks = 1;
+			break;
+		case 'h':
+		case '?':
+		default:
+			if (optopt == 'o') {
+				fprintf (stderr,
+					 "Option -%c requires an argument.\n",
+					 optopt);
+			}
+			help(argc, argv);
+			return 1;
+		}
+	}
+
+	UNUSED(verbose);
+
+	// Check if there's at least two remaining non-option
+	if (argc - optind < 2) {
+		help(argc, argv);
+		return 1;
+	}
+
+	origin = argv[optind];
+	zonefile = argv[optind + 1];
+
+	// Initialize log (no output)
+	//log_init(0);
+	//log_levels_set(LOGT_STDOUT, LOG_ANY, LOG_MASK(LOG_DEBUG));
+
+	printf("Parsing file '%s', origin '%s' ...\n",
+	       zonefile, origin);
+
+	parser = zparser_create();
+	if (!parser) {
+		fprintf(stderr, "Failed to create parser.\n");
+		//log_close();
+		return 1;
+	}
+
+	int error = zone_read(origin, zonefile, outfile, semantic_checks);
+
+	if (error) {
+	  /* FIXME! */
+//		if (error < 0) {
+//			fprintf(stderr, "Finished with error: %s.\n",
+//			       error_to_str(knot_zcompile_error_msgs, error));
+//		} else {
+//			fprintf(stderr, "Finished with %u errors.\n");
+//		}
+	} else {
+		printf("Compilation successful.\n");
+	}
+	//log_close();
+
+	return error;
+}
diff --git a/src/zcompile/zlexer.l b/src/zcompile/zlexer.l
new file mode 100644
index 0000000..c6c01fb
--- /dev/null
+++ b/src/zcompile/zlexer.l
@@ -0,0 +1,531 @@
+%{
+/*!
+ * \file zlexer.l
+ *
+ * \author minor modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         most of the code by NLnet Labs
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief lexical analyzer for (DNS) zone files.
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//#include "common.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <assert.h>
+
+#include "zcompile/zcompile.h"
+#include "libknot/dname.h"
+#include "zcompile/parser-descriptor.h"
+#include "zparser.h"
+
+#define YY_NO_INPUT
+
+/* Utils */
+extern void zc_error(const char *fmt, ...);
+extern void zc_warning(const char *fmt, ...);
+
+void strip_string(char *str)
+{
+	char *start = str;
+	char *end = str + strlen(str) - 1;
+
+	while (isspace(*start))
+		++start;
+	if (start > end) {
+		/* Completely blank. */
+		str[0] = '\0';
+	} else {
+		while (isspace(*end))
+			--end;
+		*++end = '\0';
+
+		if (str != start)
+			memmove(str, start, end - start + 1);
+	}
+}
+
+int hexdigit_to_int(char ch)
+{
+	switch (ch) {
+	case '0': return 0;
+	case '1': return 1;
+	case '2': return 2;
+	case '3': return 3;
+	case '4': return 4;
+	case '5': return 5;
+	case '6': return 6;
+	case '7': return 7;
+	case '8': return 8;
+	case '9': return 9;
+	case 'a': case 'A': return 10;
+	case 'b': case 'B': return 11;
+	case 'c': case 'C': return 12;
+	case 'd': case 'D': return 13;
+	case 'e': case 'E': return 14;
+	case 'f': case 'F': return 15;
+	default:
+		abort();
+	}
+}
+
+extern uint32_t strtottl(const char *nptr, const char **endptr);
+
+#define YY_NO_UNPUT
+#define MAXINCLUDES 10
+
+#define scanner yyscanner
+extern int zp_lex(YYSTYPE *lvalp, void *scanner);
+
+#if 0
+#define LEXOUT(s)  printf s /* used ONLY when debugging */
+#else
+#define LEXOUT(s)
+#endif
+
+enum lexer_state {
+	EXPECT_OWNER,
+	PARSING_OWNER,
+	PARSING_TTL_CLASS_TYPE,
+	PARSING_RDATA
+};
+
+static YY_BUFFER_STATE include_stack[MAXINCLUDES];
+static zparser_type zparser_stack[MAXINCLUDES];
+static int include_stack_ptr = 0;
+
+static void pop_parser_state(void *scanner);
+static void push_parser_state(FILE *input, void *scanner);
+static int parse_token(void *scanner, int token, char *in_str,
+                       enum lexer_state *lexer_state);
+
+
+/*!< \todo does not compile */
+#ifndef yy_set_bol // compat definition, for flex 2.4.6
+#define yy_set_bol(at_bol) \
+{ \
+	if (!yy_current_buffer ) \
+		yy_current_buffer = yy_create_buffer( yyin, YY_BUF_SIZE ); \
+	yy_current_buffer->yy_ch_buf[0] = ((at_bol)?'\n':' '); \
+}
+#endif
+
+%}
+
+%option nounput
+%option reentrant bison-bridge
+%option prefix = "zp_"
+%option outfile = "lex.yy.c"
+
+SPACE   [ \t]
+LETTER  [a-zA-Z]
+NEWLINE [\n\r]
+ZONESTR [^ \t\n\r();.\"\$]
+DOLLAR  \$
+COMMENT ;
+DOT     \.
+BIT     [^\]\n]|\\.
+ANY     [^\"\n\\]|\\.
+
+%x	incl bitlabel quotedstring
+
+%%
+	static int paren_open = 0;
+	static enum lexer_state lexer_state = EXPECT_OWNER;
+
+{SPACE}*{COMMENT}.*	/* ignore */
+^{DOLLAR}TTL            { lexer_state = PARSING_RDATA; return DOLLAR_TTL; }
+^{DOLLAR}ORIGIN         { lexer_state = PARSING_RDATA; return DOLLAR_ORIGIN; }
+
+ /*
+  * Handle $INCLUDE directives.  See
+  * http://dinosaur.compilertools.net/flex/flex_12.html#SEC12.
+  */
+^{DOLLAR}INCLUDE        {
+	BEGIN(incl);
+}
+<incl>\n 		|
+<incl><<EOF>>		{
+	int error_occurred = parser->error_occurred;
+	BEGIN(INITIAL);
+	zc_error("missing file name in $INCLUDE directive");
+	yy_set_bol(1); /* Set beginning of line, so "^" rules match.  */
+	++parser->line;
+	parser->error_occurred = error_occurred;
+}
+<incl>.+ 		{
+	char *tmp;
+	/*! \todo pointer to origin. */
+	void *origin = parser->origin;
+	/* domain_type *origin = parser->origin; */
+	int error_occurred = parser->error_occurred;
+
+	BEGIN(INITIAL);
+	if (include_stack_ptr >= MAXINCLUDES ) {
+		zc_error("includes nested too deeply, skipped (>%d)",
+			 MAXINCLUDES);
+	} else {
+		FILE *input;
+
+		/* Remove trailing comment.  */
+		tmp = strrchr(yytext, ';');
+		if (tmp) {
+			*tmp = '\0';
+		}
+		strip_string(yytext);
+
+		/* Parse origin for include file.  */
+		tmp = strrchr(yytext, ' ');
+		if (!tmp) {
+			tmp = strrchr(yytext, '\t');
+		}
+		if (tmp) {
+			/* split the original yytext */
+			*tmp = '\0';
+			strip_string(yytext);
+
+			/*! \todo knot_dname_new_from_wire() (dname.h)
+			 *        which knot_node to pass as node?
+			 */
+			knot_dname_t *dname;
+			dname = knot_dname_new_from_wire((uint8_t*)tmp + 1,
+							   strlen(tmp + 1),
+							   NULL);
+			if (!dname) {
+				zc_error("incorrect include origin '%s'",
+					 tmp + 1);
+			} else {
+				/*! \todo insert to zonedb. */
+				/* origin = domain_table_insert(
+					parser->db->domains, dname); */
+			}
+		}
+
+		if (strlen(yytext) == 0) {
+			zc_error("missing file name in $INCLUDE directive");
+		} else if (!(input = fopen(yytext, "r"))) {
+			char ebuf[256];
+			zc_error("cannot open include file '%s': %s",
+				 yytext, strerror_r(errno, ebuf, sizeof(ebuf)));
+		} else {
+			/* Initialize parser for include file.  */
+			char *filename = strdup(yytext);
+			push_parser_state(input, scanner); /* Destroys yytext.  */
+			parser->filename = filename;
+			parser->line = 1;
+			parser->origin = origin;
+			lexer_state = EXPECT_OWNER;
+		}
+	}
+
+	parser->error_occurred = error_occurred;
+}
+<INITIAL><<EOF>>	{
+	yy_set_bol(1); /* Set beginning of line, so "^" rules match.  */
+	if (include_stack_ptr == 0) {
+	// from: http://stackoverflow.com/questions/1756275/bison-end-of-file
+		static int once = 0;
+		once++;
+		if (once > 1) {
+			yyterminate();
+		} else {
+			return NL;
+		}
+	} else {
+		fclose(yyin);
+		pop_parser_state(scanner);
+	}
+}
+^{DOLLAR}{LETTER}+	{ zc_warning("Unknown directive: %s", yytext); }
+{DOT}	{
+	LEXOUT((". "));
+	return parse_token(scanner, '.', yytext, &lexer_state);
+}
+@	{
+	LEXOUT(("@ "));
+	return parse_token(scanner, '@', yytext, &lexer_state);
+}
+\\#	{
+	LEXOUT(("\\# "));
+	return parse_token(scanner, URR, yytext, &lexer_state);
+}
+{NEWLINE}	{
+	++parser->line;
+	if (!paren_open) {
+		lexer_state = EXPECT_OWNER;
+		LEXOUT(("NL\n"));
+		return NL;
+	} else {
+		LEXOUT(("SP "));
+		return SP;
+	}
+}
+\(	{
+	if (paren_open) {
+		zc_error("nested parentheses");
+		yyterminate();
+	}
+	LEXOUT(("( "));
+	paren_open = 1;
+	return SP;
+}
+\)	{
+	if (!paren_open) {
+		zc_error("closing parentheses without opening parentheses");
+		yyterminate();
+	}
+	LEXOUT((") "));
+	paren_open = 0;
+	return SP;
+}
+{SPACE}+	{
+	if (!paren_open && lexer_state == EXPECT_OWNER) {
+		lexer_state = PARSING_TTL_CLASS_TYPE;
+		LEXOUT(("PREV "));
+		return PREV;
+	}
+	if (lexer_state == PARSING_OWNER) {
+		lexer_state = PARSING_TTL_CLASS_TYPE;
+	}
+	LEXOUT(("SP "));
+	return SP;
+}
+
+	/* Bitlabels.  Strip leading and ending brackets.  */
+\\\[			{ BEGIN(bitlabel); }
+<bitlabel><<EOF>>	{
+	zc_error("EOF inside bitlabel");
+	BEGIN(INITIAL);
+}
+<bitlabel>{BIT}*	{ yymore(); }
+<bitlabel>\n		{ ++parser->line; yymore(); }
+<bitlabel>\]		{
+	BEGIN(INITIAL);
+	yytext[yyleng - 1] = '\0';
+	return parse_token(scanner, BITLAB, yytext, &lexer_state);
+}
+
+	/* Quoted strings.  Strip leading and ending quotes.  */
+\"			{ BEGIN(quotedstring); LEXOUT(("\" ")); }
+<quotedstring><<EOF>> 	{
+	zc_error("EOF inside quoted string");
+	BEGIN(INITIAL);
+}
+<quotedstring>{ANY}*	{ LEXOUT(("STR ")); yymore(); }
+<quotedstring>\n 	{ ++parser->line; yymore(); }
+<quotedstring>\" {
+	LEXOUT(("\" "));
+	BEGIN(INITIAL);
+	yytext[yyleng - 1] = '\0';
+	return parse_token(scanner, STR, yytext, &lexer_state);
+}
+
+({ZONESTR}|\\.|\\\n)+ {
+	/* Any allowed word.  */
+	return parse_token(scanner, STR, yytext, &lexer_state);
+}
+. {
+	zc_error("unknown character '%c' (\\%03d) seen - is this a zonefile?",
+		 (int) yytext[0], (int) yytext[0]);
+}
+%%
+
+/*
+ * Analyze "word" to see if it matches an RR type, possibly by using
+ * the "TYPExxx" notation.  If it matches, the corresponding token is
+ * returned and the TYPE parameter is set to the RR type value.
+ */
+static int
+rrtype_to_token(const char *word, uint16_t *type)
+{
+	uint16_t t = parser_rrtype_from_string(word);
+	if (t != 0) {
+		parser_rrtype_descriptor_t *entry = 0;
+		entry = parser_rrtype_descriptor_by_type(t);
+		*type = t;
+
+		/*! \todo entry should return associated token.
+			  see nsd/dns.c */
+		return entry->token;
+	}
+
+	return 0;
+}
+
+
+/*
+ * Remove \DDD constructs from the input. See RFC 1035, section 5.1.
+ */
+static size_t
+zoctet(char *text)
+{
+	/*
+	 * s follows the string, p lags behind and rebuilds the new
+	 * string
+	 */
+	char *s;
+	char *p;
+
+	for (s = p = text; *s; ++s, ++p) {
+		assert(p <= s);
+		if (s[0] != '\\') {
+			/* Ordinary character.  */
+			*p = *s;
+		} else if (isdigit((int)s[1]) && isdigit((int)s[2]) &&  isdigit((int)s[3])) {
+			/* \DDD escape.  */
+			int val = (hexdigit_to_int(s[1]) * 100 +
+				   hexdigit_to_int(s[2]) * 10 +
+				   hexdigit_to_int(s[3]));
+			if (0 <= val && val <= 255) {
+				s += 3;
+				*p = val;
+			} else {
+				zc_warning("text escape \\DDD overflow");
+				*p = *++s;
+			}
+		} else if (s[1] != '\0') {
+			/* \X where X is any character, keep X.  */
+			*p = *++s;
+		} else {
+			/* Trailing backslash, ignore it.  */
+			zc_warning("trailing backslash ignored");
+			--p;
+		}
+	}
+	*p = '\0';
+	return p - text;
+}
+
+static int parse_token(void *scanner, int token, char *in_str,
+                       enum lexer_state *lexer_state)
+{
+	size_t len = 0;
+	char *str = NULL;
+
+	struct yyguts_t *yyg = (struct yyguts_t *)scanner;
+
+	if (*lexer_state == EXPECT_OWNER) {
+		*lexer_state = PARSING_OWNER;
+	} else if (*lexer_state == PARSING_TTL_CLASS_TYPE) {
+		const char *t;
+		int token;
+		uint16_t rrclass;
+
+		/* type */
+		token = rrtype_to_token(in_str, &yylval->type);
+		if (token != 0) {
+			*lexer_state = PARSING_RDATA;
+			LEXOUT(("%d[%s] ", token, in_str));
+			return token;
+		}
+
+		/* class */
+		rrclass = parser_rrclass_from_string(in_str);
+		if (rrclass != 0) {
+			yylval->rclass = rrclass;
+			LEXOUT(("CLASS "));
+			return T_RRCLASS;
+		}
+
+		/* ttl */
+		yylval->ttl = strtottl(in_str, &t);
+		if (*t == '\0') {
+			LEXOUT(("TTL "));
+			return T_TTL;
+		}
+	}
+
+	str = strdup(yytext);
+	if (str == NULL) {
+		/* Out of memory */
+		ERR_ALLOC_FAILED;
+		return NO_MEM;
+	}
+	len = zoctet(str);
+
+	yylval->data.str = str;
+	assert(yylval->data.str != NULL);
+	yylval->data.len = len;
+
+	if (strcmp(yytext, ".") == 0) {
+		free(str);
+		yylval->data.str=".";
+	} else if (strcmp(str, "@") == 0) {
+		free(str);
+		yylval->data.str="@";
+	} else if (strcmp(str, "\\#") == 0) {
+		free(str);
+		yylval->data.str="\\#";
+	}
+
+	LEXOUT(("%d[%s] ", token, in_str));
+	return token;
+}
+
+/*
+ * Saves the file specific variables on the include stack.
+ */
+static void push_parser_state(FILE *input, void *scanner)
+{
+	struct yyguts_t *yyg = (struct yyguts_t *)scanner;
+	zparser_stack[include_stack_ptr].filename = parser->filename;
+	zparser_stack[include_stack_ptr].line = parser->line;
+	zparser_stack[include_stack_ptr].origin = parser->origin;
+	include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
+	yy_switch_to_buffer(yy_create_buffer(input, YY_BUF_SIZE, scanner),
+	                    scanner);
+	++include_stack_ptr;
+}
+
+/*
+ * Restores the file specific variables from the include stack.
+ */
+void pop_parser_state(void *scanner)
+{
+	struct yyguts_t *yyg = (struct yyguts_t *)scanner;
+	--include_stack_ptr;
+	parser->filename = zparser_stack[include_stack_ptr].filename;
+	parser->line = zparser_stack[include_stack_ptr].line;
+	parser->origin = zparser_stack[include_stack_ptr].origin;
+	yy_delete_buffer(YY_CURRENT_BUFFER, scanner);
+	yy_switch_to_buffer(include_stack[include_stack_ptr], scanner);
+}
diff --git a/src/zcompile/zparser.y b/src/zcompile/zparser.y
new file mode 100644
index 0000000..6f081e5
--- /dev/null
+++ b/src/zcompile/zparser.y
@@ -0,0 +1,1730 @@
+%{
+/*!
+ * \file zparser.y
+ *
+ * \author modifications by Jan Kadlec <jan.kadlec@nic.cz>,
+ *         notable changes: normal allocation, parser is reentrant.
+ *         most of the code by NLnet Labs
+ *         Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * \brief yacc grammar for (DNS) zone files
+ *
+ * \addtogroup zoneparser
+ * @{
+ */
+
+/*
+ * Copyright (c) 2001-2011, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//#include "common.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include "zcompile/parser-util.h"
+
+#include "libknot/libknot.h"
+#include "zcompile/zcompile.h"
+#include "zcompile/parser-descriptor.h"
+#include "zcompile/zcompile-error.h"
+#include "zparser.h"
+
+/* these need to be global, otherwise they cannot be used inside yacc */
+zparser_type *parser;
+
+#ifdef __cplusplus
+extern "C"
+#endif /* __cplusplus */
+int zp_wrap(void);
+
+/* this hold the nxt bits */
+static uint8_t nxtbits[16];
+static int dlv_warn = 1;
+
+/* 256 windows of 256 bits (32 bytes) */
+/* still need to reset the bastard somewhere */
+static uint8_t nsecbits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE];
+
+/* hold the highest rcode seen in a NSEC rdata , BUG #106 */
+uint16_t nsec_highest_rcode;
+
+void zp_error(void *scanner, const char *message);
+int zp_lex(YYSTYPE *lvalp, void *scanner);
+
+/* helper functions */
+void zc_error(const char *fmt, ...);
+void zc_warning(const char *fmt, ...);
+void zc_error_prev_line(const char *fmt, ...);
+void zc_warning_prev_line(const char *fmt, ...);
+
+#define NSEC3
+#ifdef NSEC3
+/* parse nsec3 parameters and add the (first) rdata elements */
+static void
+nsec3_add_params(const char* hash_algo_str, const char* flag_str,
+	const char* iter_str, const char* salt_str, int salt_len);
+#endif /* NSEC3 */
+
+knot_dname_t *error_dname; //XXX used to be const
+knot_dname_t *error_domain;
+
+%}
+%union {
+	knot_dname_t       *domain;
+	knot_dname_t       *dname;
+	struct lex_data      data;
+	uint32_t             ttl;
+	uint16_t             rclass;
+	uint16_t             type;
+	uint16_t             *unknown;
+}
+
+%pure-parser
+%parse-param {void *scanner}
+%lex-param {void *scanner}
+%name-prefix = "zp_"
+
+/*
+ * Tokens to represent the known RR types of DNS.
+ */
+%token <type> T_A T_NS T_MX T_TXT T_CNAME T_AAAA T_PTR T_NXT T_KEY T_SOA T_SIG
+%token <type> T_SRV T_CERT T_LOC T_MD T_MF T_MB T_MG T_MR T_NULL T_WKS T_HINFO
+%token <type> T_MINFO T_RP T_AFSDB T_X25 T_ISDN T_RT T_NSAP T_NSAP_PTR T_PX
+%token <type> T_GPOS T_EID T_NIMLOC T_ATMA T_NAPTR T_KX T_A6 T_DNAME T_SINK
+%token <type> T_OPT T_APL T_UINFO T_UID T_GID T_UNSPEC T_TKEY T_TSIG T_IXFR
+%token <type> T_AXFR T_MAILB T_MAILA T_DS T_DLV T_SSHFP T_RRSIG T_NSEC T_DNSKEY
+%token <type> T_SPF T_NSEC3 T_IPSECKEY T_DHCID T_NSEC3PARAM
+
+/* other tokens */
+%token	       DOLLAR_TTL DOLLAR_ORIGIN NL SP NO_MEM
+%token <data>  STR PREV BITLAB
+%token <ttl>   T_TTL
+%token <rclass> T_RRCLASS
+
+/* unknown RRs */
+%token	       URR
+%token <type>  T_UTYPE
+
+%type <type>	type_and_rdata
+%type <domain>	owner dname abs_dname
+%type <dname>	rel_dname label
+%type <data>	wire_dname wire_abs_dname wire_rel_dname wire_label
+%type <data>	concatenated_str_seq str_sp_seq str_dot_seq dotted_str
+%type <data>	nxt_seq nsec_more
+%type <unknown> rdata_unknown
+
+%%
+lines:	/* empty file */
+    |	lines line
+    ;
+
+line:	NL
+    |	sp NL
+    |	NO_MEM {
+    		zc_error_prev_line("Parser ran out of memory!");
+		YYABORT;
+	}
+    |	PREV NL		{}    /* Lines containing only whitespace.  */
+    |	ttl_directive
+	{
+	    parser->error_occurred = 0;
+    }
+    |	origin_directive
+	{
+	    parser->error_occurred = 0;
+    }
+    |	rr
+    {	/* rr should be fully parsed */
+	if (!parser->error_occurred) {
+		/*!< \todo assign error to error occurred */
+		/*! \todo Make sure this does not crash */
+		if (parser->current_rrset->owner == NULL) {
+			knot_rrset_deep_free(&(parser->current_rrset),
+					       0, 0, 0);
+			knot_zone_deep_free(&(parser->current_zone),
+					      1);
+			YYABORT;
+		}
+		knot_rdata_t *tmp_rdata = knot_rdata_new();
+		if (tmp_rdata == NULL) {
+			knot_rrset_deep_free(&(parser->current_rrset),
+					       0, 0, 0);
+			knot_zone_deep_free(&(parser->current_zone),
+					      1);
+			YYABORT;
+		}
+
+		if (knot_rdata_set_items(tmp_rdata,
+		    parser->temporary_items,
+		    parser->rdata_count) != 0) {
+			knot_rdata_free(&tmp_rdata);
+			knot_rrset_deep_free(&(parser->current_rrset), 0, 0, 0);
+			knot_zone_deep_free(&(parser->current_zone), 1);
+			YYABORT;
+		}
+
+		assert(parser->current_rrset->rdata == NULL);
+		if (knot_rrset_add_rdata(parser->current_rrset, tmp_rdata)
+		    != 0) {
+		    	fprintf(stderr, "Could not add rdata!\n");
+		    }
+//		tmp_rdata->next = tmp_rdata;
+//		parser->current_rrset->rdata = tmp_rdata;
+
+		if (!knot_dname_is_fqdn(parser->current_rrset->owner)) {
+			knot_dname_t *tmp_dname =
+				knot_dname_cat(parser->current_rrset->owner,
+						 parser->root_domain);
+			if (tmp_dname == NULL) {
+				knot_rrset_deep_free(&(parser->current_rrset),
+				                       0, 0, 0);
+				knot_zone_deep_free(&(parser->current_zone),
+				                      1);
+				YYABORT;
+			}
+//			knot_rrset_set_owner(parser->current_rrset, tmp_dname);
+		}
+
+		assert(parser->current_rrset->owner != NULL);
+		knot_dname_retain(parser->current_rrset->owner);
+		int ret = 0;
+		if ((ret = process_rr()) != 0) {
+			char *name =
+				knot_dname_to_str(parser->current_rrset->owner);
+			fprintf(stderr, "Error: could not process RRSet\n"
+				"owner: %s reason: %s\n",
+				name,
+				error_to_str(knot_zcompile_error_msgs, ret));
+			free(name);
+
+			/* If the owner is not already in the table, free it. */
+//			if (dnslib_dname_table_find_dname(parser->dname_table,
+//				parser->current_rrset->owner) == NULL) {
+//				dnslib_dname_free(&parser->
+//				                  current_rrset->owner);
+//			} /* This would never happen */
+
+			if (ret == KNOTDZCOMPILE_EBADSOA) {
+				knot_rrset_deep_free(&(parser->current_rrset),
+						       0, 0, 0);
+				knot_zone_deep_free(&(parser->current_zone),
+						      1);
+				YYABORT;
+			} else {
+				YYABORT;
+				/* Free rdata, it will not be added
+				 * and hence cannot be
+				 * freed with rest of the zone. */
+/*				knot_rdata_deep_free(&tmp_rdata,
+				                       parser->
+				                       current_rrset->type,
+				                       0); */
+			}
+		}
+	} else {
+		/* Error occured. This could either be lack of memory, or one
+		 * of the converting function was not able to convert. */
+		if (parser->error_occurred == KNOTDZCOMPILE_ENOMEM) {
+			/* Ran out of memory in converting functions. */
+			fprintf(stderr, "Parser ran out "
+			                "of memory, aborting!\n");
+			knot_rrset_deep_free(&(parser->current_rrset),
+					       0, 0, 0);
+			knot_zone_deep_free(&(parser->current_zone),
+					      1);
+			YYABORT;
+		}
+	}
+
+//	printf("Current rrset name: %p (%s)\n", parser->current_rrset->owner->name,
+//	knot_dname_to_str(parser->current_rrset->owner));
+//	getchar();
+
+//	knot_dname_release(parser->current_rrset->owner);
+
+	    parser->current_rrset->type = 0;
+	    parser->rdata_count = 0;
+	    parser->current_rrset->rdata = NULL;
+	    parser->error_occurred = 0;
+    }
+    |	error NL
+    ;
+
+/* needed to cope with ( and ) in arbitary places */
+sp:	SP
+    |	sp SP
+    ;
+
+trail:	NL
+    |	sp NL
+    ;
+
+ttl_directive:	DOLLAR_TTL sp STR trail
+    {
+	parser->default_ttl = zparser_ttl2int($3.str,
+					      &(parser->error_occurred));
+	if (parser->error_occurred == 1) {
+		parser->default_ttl = DEFAULT_TTL;
+		parser->error_occurred = 0;
+	}
+
+	free($3.str);
+    }
+    ;
+
+
+
+origin_directive:	DOLLAR_ORIGIN sp abs_dname trail
+    {
+	    knot_node_t *origin_node = knot_node_new($3 ,NULL, 0);
+	if (parser->origin != NULL) {
+//		knot_node_free(&parser->origin, 1);
+	}
+	    parser->origin = origin_node;
+    }
+    |	DOLLAR_ORIGIN sp rel_dname trail
+    {
+	    zc_error_prev_line("$ORIGIN directive requires"
+			       "absolute domain name");
+    }
+    ;
+
+rr:	owner classttl type_and_rdata
+    {
+	    /* Save the pointer, it might get freed! */
+	    parser->current_rrset->owner = $1;
+//	    parser->current_rrset->owner = $1;
+//	    printf("new owner assigned: %p\n", $1);
+	    parser->current_rrset->type = $3;
+    }
+    ;
+
+owner:	dname sp
+    {
+//    	char *name = knot_dname_to_str($1);
+//	printf("Totally new dname: %p %s\n", $1,
+//	name);
+//	free(name);
+	if (parser->prev_dname != NULL) {
+	//	knot_dname_release(parser->prev_dname);
+	}
+	parser->prev_dname = $1;//knot_dname_deep_copy($1);
+//	knot_dname_retain(parser->prev_dname);
+	$$ = $1;
+    }
+    |	PREV
+    {
+//	    printf("Name from prev_dname!: %p %s\n", parser->prev_dname,
+//	    knot_dname_to_str(parser->prev_dname));
+	    knot_dname_retain(parser->prev_dname);
+	    $$ = parser->prev_dname;//knot_dname_deep_copy(parser->prev_dname);
+    }
+    ;
+
+classttl:	/* empty - fill in the default, def. ttl and IN class */
+    {
+	    parser->current_rrset->ttl = parser->default_ttl;
+	    parser->current_rrset->rclass = parser->default_class;
+    }
+    |	T_RRCLASS sp		/* no ttl */
+    {
+	    parser->current_rrset->ttl = parser->default_ttl;
+	    parser->current_rrset->rclass = $1;
+    }
+    |	T_TTL sp		/* no class */
+    {
+	    parser->current_rrset->ttl = $1;
+	    parser->current_rrset->rclass = parser->default_class;
+    }
+    |	T_TTL sp T_RRCLASS sp	/* the lot */
+    {
+	    parser->current_rrset->ttl = $1;
+	    parser->current_rrset->rclass = $3;
+    }
+    |	T_RRCLASS sp T_TTL sp	/* the lot - reversed */
+    {
+	    parser->current_rrset->ttl = $3;
+	    parser->current_rrset->rclass = $1;
+    }
+    ;
+
+dname:	abs_dname
+    |	rel_dname
+    {
+	    if ($1 == error_dname) {
+		    $$ = error_domain;
+	    } else if ($1->size + parser->origin->owner->size - 1 >
+		       MAXDOMAINLEN) {
+		    zc_error("domain name exceeds %d character limit",
+			     MAXDOMAINLEN);
+		    $$ = error_domain;
+	    } else {
+		    $$ = knot_dname_cat($1,
+					  parser->origin->owner);
+//		printf("leak: %s\n", knot_dname_to_str($$));
+//		getchar();
+	    }
+    }
+    ;
+
+abs_dname:	'.'
+    {
+	    $$ = parser->root_domain;
+	    /* TODO how about concatenation now? */
+    }
+    |	'@'
+    {
+	    $$ = parser->origin->owner;
+    }
+    |	rel_dname '.'
+    {
+	    if ($1 != error_dname) {
+		    $$ = $1;
+	    } else {
+		    $$ = error_domain;
+	    }
+    }
+    ;
+
+label:	STR
+    {
+	    if ($1.len > MAXLABELLEN) {
+		    zc_error("label exceeds %d character limit", MAXLABELLEN);
+		    $$ = error_dname;
+	    } else {
+//	    printf("%s\n", $1.str);
+		    $$ = knot_dname_new_from_str($1.str, $1.len, NULL);
+//	    printf("Creating new (label): %s %p\n", $1.str, $$);
+//	printf("new: %p %s\n", $$, $1.str);
+	$$->ref.count = 0;
+	    }
+
+	    free($1.str);
+
+    }
+    |	BITLAB
+    {
+	    zc_error("bitlabels are not supported."
+		     "RFC2673 has status experimental.");
+	    $$ = error_dname;
+    }
+    ;
+
+rel_dname:	label
+    |	rel_dname '.' label
+    {
+	    if ($1 == error_dname || $3 == error_dname) {
+		    $$ = error_dname;
+	    } else if ($1->size + $3->size - 1 > MAXDOMAINLEN) {
+		    zc_error("domain name exceeds %d character limit",
+			     MAXDOMAINLEN);
+		    $$ = error_dname;
+	    } else {
+		    $$ = knot_dname_cat($1, $3);
+//		    knot_dname_release($1); /*!< \todo check! */
+		    knot_dname_free(&$3);
+		}
+    }
+    ;
+
+/*
+ * Some dnames in rdata are handled as opaque blobs
+ */
+
+wire_dname:	wire_abs_dname
+    |	wire_rel_dname
+    ;
+
+wire_abs_dname:	'.'
+    {
+	    char *result = malloc(2 * sizeof(char));
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    result[0] = 0;
+	    result[1] = '\0';
+	    $$.str = result;
+	    $$.len = 1;
+    }
+    |	wire_rel_dname '.'
+    {
+	    char *result = malloc($1.len + 2 * sizeof(char));
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy(result, $1.str, $1.len);
+	    result[$1.len] = 0;
+	    result[$1.len+1] = '\0';
+	    $$.str = result;
+	    $$.len = $1.len + 1;
+
+	    free($1.str);
+;
+    }
+    ;
+
+wire_label:	STR
+    {
+	    char *result = malloc($1.len + sizeof(char));
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+
+	    if ($1.len > MAXLABELLEN)
+		    zc_error("label exceeds %d character limit", MAXLABELLEN);
+
+	    /* make label anyway */
+	    result[0] = $1.len;
+	    memcpy(result+1, $1.str, $1.len);
+
+	    $$.str = result;
+	    $$.len = $1.len + 1;
+
+	    free($1.str);
+    }
+    ;
+
+wire_rel_dname:	wire_label
+    |	wire_rel_dname '.' wire_label
+    {
+	    if ($1.len + $3.len - 3 > MAXDOMAINLEN)
+		    zc_error("domain name exceeds %d character limit",
+			     MAXDOMAINLEN);
+
+	    /* make dname anyway */
+	    $$.len = $1.len + $3.len;
+	    $$.str = malloc($$.len + sizeof(char));
+	    if ($$.str == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+		knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy($$.str, $1.str, $1.len);
+	    memcpy($$.str + $1.len, $3.str, $3.len);
+	    $$.str[$$.len] = '\0';
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+
+
+str_seq:	STR
+    {
+	    zadd_rdata_txt_wireformat(zparser_conv_text($1.str, $1.len), 1);
+
+	    free($1.str);
+    }
+    |	str_seq sp STR
+    {
+	    zadd_rdata_txt_wireformat(zparser_conv_text($3.str, $3.len), 0);
+//	zc_warning("multiple TXT entries are currently not supported!");
+
+	    free($3.str);
+    }
+    ;
+
+/*
+ * Generate a single string from multiple STR tokens, separated by
+ * spaces or dots.
+ */
+concatenated_str_seq:	STR
+    |	'.'
+    {
+	    $$.len = 1;
+	    $$.str = strdup(".");
+    }
+    |	concatenated_str_seq sp STR
+    {
+	    $$.len = $1.len + $3.len + 1;
+	    $$.str = malloc($$.len + 1);
+	    if ($$.str == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+
+	    memcpy($$.str, $1.str, $1.len);
+	    memcpy($$.str + $1.len, " ", 1);
+	    memcpy($$.str + $1.len + 1, $3.str, $3.len);
+	    $$.str[$$.len] = '\0';
+
+	    free($1.str);
+	    free($3.str);
+    }
+    |	concatenated_str_seq '.' STR
+    {
+	    $$.len = $1.len + $3.len + 1;
+	    $$.str = malloc($$.len + 1);
+	    if ($$.str == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy($$.str, $1.str, $1.len);
+	    memcpy($$.str + $1.len, ".", 1);
+	    memcpy($$.str + $1.len + 1, $3.str, $3.len);
+
+	    free($1.str);
+	    free($3.str);
+
+	    $$.str[$$.len] = '\0';
+    }
+    ;
+
+/* used to convert a nxt list of types */
+nxt_seq:	STR
+    {
+	    uint16_t type = knot_rrtype_from_string($1.str);
+	    if (type != 0 && type < 128) {
+		    set_bit(nxtbits, type);
+	    } else {
+		    zc_error("bad type %d in NXT record", (int) type);
+	    }
+
+	    free($1.str);
+    }
+    |	nxt_seq sp STR
+    {
+	    uint16_t type = knot_rrtype_from_string($3.str);
+	    if (type != 0 && type < 128) {
+		    set_bit(nxtbits, type);
+	    } else {
+		    zc_error("bad type %d in NXT record", (int) type);
+	    }
+
+	    free($3.str);
+    }
+    ;
+
+nsec_more:	SP nsec_more
+    {
+    }
+    |	NL
+    {
+    }
+    |	STR nsec_seq
+    {
+	    uint16_t type = knot_rrtype_from_string($1.str);
+	    if (type != 0) {
+		    if (type > nsec_highest_rcode) {
+			    nsec_highest_rcode = type;
+		    }
+		    set_bitnsec(nsecbits, type);
+	    } else {
+		    zc_error("bad type %d in NSEC record", (int) type);
+	    }
+
+	    free($1.str);
+    }
+    ;
+
+nsec_seq:	NL
+	|	SP nsec_more
+	;
+
+/*
+ * Sequence of STR tokens separated by spaces.	The spaces are not
+ * preserved during concatenation.
+ */
+str_sp_seq:	STR
+    |	str_sp_seq sp STR
+    {
+	    char *result = malloc($1.len + $3.len + 1);
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	fprintf(stderr, "Parser ran out of memory, aborting!\n");
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy(result, $1.str, $1.len);
+	    memcpy(result + $1.len, $3.str, $3.len);
+	    $$.str = result;
+	    $$.len = $1.len + $3.len;
+	    $$.str[$$.len] = '\0';
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+/*
+ * Sequence of STR tokens separated by dots.  The dots are not
+ * preserved during concatenation.
+ */
+str_dot_seq:	STR
+    |	str_dot_seq '.' STR
+    {
+	    char *result = malloc($1.len + $3.len + 1);
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	fprintf(stderr, "Parser ran out of memory, aborting!\n");
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy(result, $1.str, $1.len);
+	    memcpy(result + $1.len, $3.str, $3.len);
+	    $$.str = result;
+	    $$.len = $1.len + $3.len;
+	    $$.str[$$.len] = '\0';
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+/*
+ * A string that can contain dots.
+ */
+dotted_str:	STR
+    |	'.'
+    {
+	$$.str = ".";
+	$$.len = 1;
+    }
+    |	dotted_str '.'
+    {
+	    char *result = malloc($1.len + 2);
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	fprintf(stderr, "Parser ran out of memory, aborting!\n");
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy(result, $1.str, $1.len);
+	    result[$1.len] = '.';
+	    $$.str = result;
+	    $$.len = $1.len + 1;
+	    $$.str[$$.len] = '\0';
+
+	    free($1.str);
+    }
+    |	dotted_str '.' STR
+    {
+	    char *result = malloc($1.len + $3.len + 2);
+	    if (result == NULL) {
+	    	ERR_ALLOC_FAILED;
+	    	fprintf(stderr, "Parser ran out of memory, aborting!\n");
+	    	knot_rrset_deep_free(&(parser->current_rrset),
+		                       0, 0, 0);
+	        knot_zone_deep_free(&(parser->current_zone),
+		                      1);
+		YYABORT;
+	    }
+	    memcpy(result, $1.str, $1.len);
+	    result[$1.len] = '.';
+	    memcpy(result + $1.len + 1, $3.str, $3.len);
+	    $$.str = result;
+	    $$.len = $1.len + $3.len + 1;
+	    $$.str[$$.len] = '\0';
+
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+/* define what we can parse */
+type_and_rdata:
+    /*
+     * All supported RR types.	We don't support NULL and types marked obsolete.
+     */
+	T_A sp rdata_a
+    |	T_A sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NS sp rdata_domain_name
+    |	T_NS sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_MD sp rdata_domain_name { zc_warning_prev_line("MD is obsolete"); }
+    |	T_MD sp rdata_unknown
+    {
+	    zc_warning_prev_line("MD is obsolete");
+	    $$ = $1; parse_unknown_rdata($1, $3);
+    }
+    |	T_MF sp rdata_domain_name { zc_warning_prev_line("MF is obsolete"); }
+    |	T_MF sp rdata_unknown
+    {
+	    zc_warning_prev_line("MF is obsolete");
+	    $$ = $1;
+	    parse_unknown_rdata($1, $3);
+    }
+    |	T_CNAME sp rdata_domain_name
+    |	T_CNAME sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_SOA sp rdata_soa
+    |	T_SOA sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_MB sp rdata_domain_name { zc_warning_prev_line("MB is obsolete"); }
+    |	T_MB sp rdata_unknown
+    {
+	    zc_warning_prev_line("MB is obsolete");
+	    $$ = $1;
+	    parse_unknown_rdata($1, $3);
+    }
+    |	T_MG sp rdata_domain_name
+    |	T_MG sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_MR sp rdata_domain_name
+    |	T_MR sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+      /* NULL */
+    |	T_WKS sp rdata_wks
+    |	T_WKS sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_PTR sp rdata_domain_name
+    |	T_PTR sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_HINFO sp rdata_hinfo
+    |	T_HINFO sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_MINFO sp rdata_minfo /* Experimental */
+    |	T_MINFO sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_MX sp rdata_mx
+    |	T_MX sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_TXT sp rdata_txt
+    |	T_TXT sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_SPF sp rdata_txt
+    |	T_SPF sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_RP sp rdata_rp		/* RFC 1183 */
+    |	T_RP sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_AFSDB sp rdata_afsdb	/* RFC 1183 */
+    |	T_AFSDB sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_X25 sp rdata_x25	/* RFC 1183 */
+    |	T_X25 sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_ISDN sp rdata_isdn	/* RFC 1183 */
+    |	T_ISDN sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_IPSECKEY sp rdata_ipseckey	/* RFC 4025 */
+    |	T_IPSECKEY sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_DHCID sp rdata_dhcid
+    |	T_DHCID sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_RT sp rdata_rt		/* RFC 1183 */
+    |	T_RT sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NSAP sp rdata_nsap	/* RFC 1706 */
+    |	T_NSAP sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_SIG sp rdata_rrsig
+    |	T_SIG sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_KEY sp rdata_dnskey
+    |	T_KEY sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_PX sp rdata_px		/* RFC 2163 */
+    |	T_PX sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_AAAA sp rdata_aaaa
+    |	T_AAAA sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_LOC sp rdata_loc
+    |	T_LOC sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NXT sp rdata_nxt
+    |	T_NXT sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_SRV sp rdata_srv
+    |	T_SRV sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NAPTR sp rdata_naptr	/* RFC 2915 */
+    |	T_NAPTR sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_KX sp rdata_kx		/* RFC 2230 */
+    |	T_KX sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_CERT sp rdata_cert	/* RFC 2538 */
+    |	T_CERT sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_DNAME sp rdata_domain_name /* RFC 2672 */
+    |	T_DNAME sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_APL trail		/* RFC 3123 */
+    |	T_APL sp rdata_apl	/* RFC 3123 */
+    |	T_APL sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_DS sp rdata_ds
+    |	T_DS sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_DLV sp rdata_dlv
+    {
+	    if (dlv_warn) {
+		    dlv_warn = 0;
+		    zc_warning_prev_line("DLV is experimental");
+	    }
+    }
+    |	T_DLV sp rdata_unknown
+    {
+	    if (dlv_warn) {
+		    dlv_warn = 0;
+		    zc_warning_prev_line("DLV is experimental");
+	    }
+	    $$ = $1;
+	    parse_unknown_rdata($1, $3);
+    }
+    |	T_SSHFP sp rdata_sshfp
+    |	T_SSHFP sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_RRSIG sp rdata_rrsig
+    |	T_RRSIG sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NSEC sp rdata_nsec
+    |	T_NSEC sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NSEC3 sp rdata_nsec3
+    |	T_NSEC3 sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_NSEC3PARAM sp rdata_nsec3_param
+    |	T_NSEC3PARAM sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_DNSKEY sp rdata_dnskey
+    |	T_DNSKEY sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+    |	T_UTYPE sp rdata_unknown { $$ = $1; parse_unknown_rdata($1, $3); }
+
+    |	STR error NL
+    {
+	    zc_error_prev_line("unrecognized RR type '%s'", $1.str);
+	    free($1.str);
+    }
+    |	NO_MEM
+    {
+    	zc_error_prev_line("parser ran out of memory!");
+    	YYABORT;
+    }
+    ;
+
+/*
+ *
+ * below are all the definition for all the different rdata
+ *
+ */
+
+rdata_a:	dotted_str trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_a($1.str));
+	    free($1.str);
+    }
+    ;
+
+rdata_domain_name:	dname trail
+    {
+	    /* convert a single dname record */
+		if ($1 != NULL) {
+			if (!knot_dname_is_fqdn($1)) {
+			knot_dname_cat($1, parser->root_domain);
+//			parser->current_rrset->owner =
+//				knot_dname_cat($1, parser->root_domain);
+			}
+		}
+	    zadd_rdata_domain($1);
+    }
+    ;
+
+rdata_soa:	dname sp dname sp STR sp STR sp STR sp STR sp STR trail
+    {
+	    /* convert the soa data */
+			if (!knot_dname_is_fqdn($1)) {
+			knot_dname_cat($1, parser->root_domain);
+//			parser->current_rrset->owner =
+//				knot_dname_cat($1, parser->root_domain);
+
+		}
+			if (!knot_dname_is_fqdn($3)) {
+			knot_dname_cat($3, parser->root_domain);
+//			parser->current_rrset->owner =
+//				knot_dname_cat($3, parser->root_domain);
+
+		}
+	    zadd_rdata_domain($1);	/* prim. ns */
+	    zadd_rdata_domain($3);	/* email */
+	    zadd_rdata_wireformat(zparser_conv_serial($5.str)); /* serial */
+	    zadd_rdata_wireformat(zparser_conv_period($7.str)); /* refresh */
+	    zadd_rdata_wireformat(zparser_conv_period($9.str)); /* retry */
+	    zadd_rdata_wireformat(zparser_conv_period($11.str)); /* expire */
+	    zadd_rdata_wireformat(zparser_conv_period($13.str)); /* minimum */
+
+	    free($5.str);
+	    free($7.str);
+	    free($9.str);
+	    free($11.str);
+	    free($13.str);
+    }
+    ;
+
+rdata_wks:	dotted_str sp STR sp concatenated_str_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_a($1.str)); /* address */
+	    zadd_rdata_wireformat(zparser_conv_services($3.str, $5.str));
+	    /* protocol and services */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+    }
+    ;
+
+rdata_hinfo:	STR sp STR trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_text($1.str, $1.len)); /* CPU */
+	    zadd_rdata_wireformat(zparser_conv_text($3.str, $3.len)); /* OS*/
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+rdata_minfo:	dname sp dname trail
+    {
+				if (!knot_dname_is_fqdn($1)) {
+
+			knot_dname_cat($1, parser->root_domain);
+
+		}
+					if (!knot_dname_is_fqdn($3)) {
+
+			knot_dname_cat($3, parser->root_domain);
+
+		}
+
+	    /* convert a single dname record */
+	    zadd_rdata_domain($1);
+	    zadd_rdata_domain($3);
+    }
+    ;
+
+rdata_mx:	STR sp dname trail
+    {
+					if (!knot_dname_is_fqdn($3)) {
+			knot_dname_cat($3, parser->root_domain);
+		}
+
+	    zadd_rdata_wireformat(zparser_conv_short($1.str));  /* priority */
+	    zadd_rdata_domain($3);	/* MX host */
+
+	    free($1.str);
+    }
+    ;
+
+rdata_txt:	str_seq trail
+    {
+	; //zadd_rdata_txt_clean_wireformat();
+    }
+    ;
+
+/* RFC 1183 */
+rdata_rp:	dname sp dname trail
+    {
+					if (!knot_dname_is_fqdn($1)) {
+			knot_dname_cat($1, parser->root_domain);
+		}
+					if (!knot_dname_is_fqdn($3)) {
+			knot_dname_cat($3, parser->root_domain);
+		}
+
+	    zadd_rdata_domain($1); /* mbox d-name */
+	    zadd_rdata_domain($3); /* txt d-name */
+    }
+    ;
+
+/* RFC 1183 */
+rdata_afsdb:	STR sp dname trail
+    {
+					if (!knot_dname_is_fqdn($3)) {
+			knot_dname_cat($3, parser->root_domain);
+		}
+
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* subtype */
+	    zadd_rdata_domain($3); /* domain name */
+
+	    free($1.str);
+    }
+    ;
+
+/* RFC 1183 */
+rdata_x25:	STR trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_text($1.str, $1.len));
+	    /* X.25 address. */
+
+	    free($1.str);
+    }
+    ;
+
+/* RFC 1183 */
+rdata_isdn:	STR trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_text($1.str, $1.len));
+	    /* address */
+
+	    free($1.str);
+    }
+    |	STR sp STR trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_text($1.str, $1.len));
+	    /* address */
+	    zadd_rdata_wireformat(zparser_conv_text($3.str, $3.len));
+	    /* sub-address */
+
+	    free($1.str);
+	    free($3.str);
+    }
+    ;
+
+/* RFC 1183 */
+rdata_rt:	STR sp dname trail
+    {
+						if (!knot_dname_is_fqdn($3)) {
+			knot_dname_cat($3, parser->root_domain);
+		}
+
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* preference */
+	    zadd_rdata_domain($3); /* intermediate host */
+
+	    free($1.str);
+    }
+    ;
+
+/* RFC 1706 */
+rdata_nsap:	str_dot_seq trail
+    {
+	    /* String must start with "0x" or "0X".	 */
+	    if (strncasecmp($1.str, "0x", 2) != 0) {
+		    zc_error_prev_line("NSAP rdata must start with '0x'");
+	    } else {
+		    zadd_rdata_wireformat(zparser_conv_hex($1.str + 2,
+							   $1.len - 2));
+		    /* NSAP */
+	    }
+
+	    free($1.str);
+    }
+    ;
+
+/* RFC 2163 */
+rdata_px:	STR sp dname sp dname trail
+    {
+			if (!knot_dname_is_fqdn($3)) {
+				knot_dname_cat($3, parser->root_domain);
+		}
+					if (!knot_dname_is_fqdn($5)) {
+				knot_dname_cat($5, parser->root_domain);
+		}
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* preference */
+	    zadd_rdata_domain($3); /* MAP822 */
+	    zadd_rdata_domain($5); /* MAPX400 */
+
+	    free($1.str);
+    }
+    ;
+
+rdata_aaaa:	dotted_str trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_aaaa($1.str));
+	    /* IPv6 address */
+
+	    free($1.str);
+    }
+    ;
+
+rdata_loc:	concatenated_str_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_loc($1.str)); /* Location */
+
+	    free($1.str);
+    }
+    ;
+
+rdata_nxt:	dname sp nxt_seq trail
+    {
+				if (!knot_dname_is_fqdn($1)) {
+				knot_dname_cat($1, parser->root_domain);
+		}
+	    zadd_rdata_domain($1); /* nxt name */
+	    zadd_rdata_wireformat(zparser_conv_nxt(nxtbits)); /* nxt bitlist */
+	    memset(nxtbits, 0, sizeof(nxtbits));
+    }
+    ;
+
+rdata_srv:	STR sp STR sp STR sp dname trail
+    {
+				if (!knot_dname_is_fqdn($7)) {
+				knot_dname_cat($7, parser->root_domain);
+
+		}
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* prio */
+	    zadd_rdata_wireformat(zparser_conv_short($3.str)); /* weight */
+	    zadd_rdata_wireformat(zparser_conv_short($5.str)); /* port */
+	    zadd_rdata_domain($7); /* target name */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+    }
+    ;
+
+/* RFC 2915 */
+rdata_naptr:	STR sp STR sp STR sp STR sp STR sp dname trail
+    {
+				if (!knot_dname_is_fqdn($11)) {
+				knot_dname_cat($11, parser->root_domain);
+
+		}
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* order */
+	    zadd_rdata_wireformat(zparser_conv_short($3.str)); /* preference */
+	    zadd_rdata_wireformat(zparser_conv_text($5.str, $5.len));
+	    /* flags */
+	    zadd_rdata_wireformat(zparser_conv_text($7.str, $7.len));
+	    /* service */
+	    zadd_rdata_wireformat(zparser_conv_text($9.str, $9.len));
+	    /* regexp */
+	    zadd_rdata_domain($11); /* target name */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+	    free($9.str);
+    }
+    ;
+
+/* RFC 2230 */
+rdata_kx:	STR sp dname trail
+    {
+				if (!knot_dname_is_fqdn($3)) {
+				knot_dname_cat($3, parser->root_domain);
+		}
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* preference */
+	    zadd_rdata_domain($3); /* exchanger */
+
+	    free($1.str);
+    }
+    ;
+
+/* RFC 2538 */
+rdata_cert:	STR sp STR sp STR sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_certificate_type($1.str));
+	    /* type */
+	    zadd_rdata_wireformat(zparser_conv_short($3.str)); /* key tag */
+	    zadd_rdata_wireformat(zparser_conv_algorithm($5.str));
+	    /* algorithm */
+	    zadd_rdata_wireformat(zparser_conv_b64($7.str));
+	    /* certificate or CRL */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+    }
+    ;
+
+/* RFC 3123 */
+rdata_apl:	rdata_apl_seq trail
+    ;
+
+rdata_apl_seq:	dotted_str
+    {
+	    zadd_rdata_wireformat(zparser_conv_apl_rdata($1.str));
+
+	    free($1.str);
+    }
+    |	rdata_apl_seq sp dotted_str
+    {
+	    zadd_rdata_wireformat(zparser_conv_apl_rdata($3.str));
+
+	    free($3.str);
+    }
+    ;
+
+rdata_ds:	STR sp STR sp STR sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* keytag */
+	    zadd_rdata_wireformat(zparser_conv_algorithm($3.str)); /* alg */
+	    zadd_rdata_wireformat(zparser_conv_byte($5.str)); /* type */
+	    zadd_rdata_wireformat(zparser_conv_hex($7.str, $7.len)); /* hash */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+    }
+    ;
+
+rdata_dlv:	STR sp STR sp STR sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* keytag */
+	    zadd_rdata_wireformat(zparser_conv_algorithm($3.str)); /* alg */
+	    zadd_rdata_wireformat(zparser_conv_byte($5.str)); /* type */
+	    zadd_rdata_wireformat(zparser_conv_hex($7.str, $7.len)); /* hash */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+    }
+    ;
+
+rdata_sshfp:	STR sp STR sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_byte($1.str)); /* alg */
+	    zadd_rdata_wireformat(zparser_conv_byte($3.str)); /* fp type */
+	    zadd_rdata_wireformat(zparser_conv_hex($5.str, $5.len)); /* hash */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+    }
+    ;
+
+rdata_dhcid:	str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_b64($1.str)); /* data blob */
+
+	    free($1.str);
+    }
+    ;
+
+rdata_rrsig:	STR sp STR sp STR sp STR sp STR sp STR
+		sp STR sp wire_dname sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_rrtype($1.str));
+	    /* rr covered */
+	    zadd_rdata_wireformat(zparser_conv_algorithm($3.str)); /* alg */
+	    zadd_rdata_wireformat(zparser_conv_byte($5.str)); /* # labels */
+	    zadd_rdata_wireformat(zparser_conv_period($7.str));
+	    /* # orig TTL */
+	    zadd_rdata_wireformat(zparser_conv_time($9.str)); /* sig exp */
+	    zadd_rdata_wireformat(zparser_conv_time($11.str)); /* sig inc */
+	    zadd_rdata_wireformat(zparser_conv_short($13.str)); /* key id */
+/*	    zadd_rdata_wireformat(zparser_conv_dns_name((const uint8_t*)
+							 $15.str,
+							 $15.len));*/
+	    knot_dname_t *dname =
+		knot_dname_new_from_wire((uint8_t *)$15.str, $15.len, NULL);
+	    if (dname == NULL) {
+	    	parser->error_occurred = KNOTDZCOMPILE_ENOMEM;
+	    } else {
+	    	knot_dname_cat(dname, parser->root_domain);
+	    }
+
+	    zadd_rdata_domain(dname);
+	    /* sig name */
+	    zadd_rdata_wireformat(zparser_conv_b64($17.str)); /* sig data */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+	    free($9.str);
+	    free($11.str);
+	    free($13.str);
+	    free($15.str);
+	    free($17.str);
+    }
+    ;
+
+rdata_nsec:	wire_dname nsec_seq
+    {
+/*	    zadd_rdata_wireformat(zparser_conv_dns_name((const uint8_t*)
+							$1.str,
+							$1.len));*/
+
+	    knot_dname_t *dname =
+		knot_dname_new_from_wire((uint8_t *)$1.str, $1.len, NULL);
+
+	    free($1.str);
+
+	    knot_dname_cat(dname, parser->root_domain);
+
+	    zadd_rdata_domain(dname);
+	    /* nsec name */
+	    zadd_rdata_wireformat(zparser_conv_nsec(nsecbits));
+	    /* nsec bitlist */
+	    memset(nsecbits, 0, sizeof(nsecbits));
+	    nsec_highest_rcode = 0;
+    }
+    ;
+
+rdata_nsec3:   STR sp STR sp STR sp STR sp STR nsec_seq
+    {
+#ifdef NSEC3
+	    nsec3_add_params($1.str, $3.str, $5.str, $7.str, $7.len);
+
+/*	    knot_dname_t *dname =
+		knot_dname_new_from_str($9.str, $9.len, NULL);
+
+	    zadd_rdata_domain(dname); */
+
+	    zadd_rdata_wireformat(zparser_conv_b32($9.str));
+	    /* next hashed name */
+	    zadd_rdata_wireformat(zparser_conv_nsec(nsecbits));
+	    /* nsec bitlist */
+	    memset(nsecbits, 0, sizeof(nsecbits));
+	    nsec_highest_rcode = 0;
+#else
+	    zc_error_prev_line("nsec3 not supported");
+#endif /* NSEC3 */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+	    free($9.str);
+    }
+    ;
+
+rdata_nsec3_param:   STR sp STR sp STR sp STR trail
+    {
+#ifdef NSEC3
+	    nsec3_add_params($1.str, $3.str, $5.str, $7.str, $7.len);
+#else
+	    zc_error_prev_line("nsec3 not supported");
+#endif /* NSEC3 */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+    }
+    ;
+
+rdata_dnskey:	STR sp STR sp STR sp str_sp_seq trail
+    {
+	    zadd_rdata_wireformat(zparser_conv_short($1.str)); /* flags */
+	    zadd_rdata_wireformat(zparser_conv_byte($3.str)); /* proto */
+	    zadd_rdata_wireformat(zparser_conv_algorithm($5.str)); /* alg */
+	    zadd_rdata_wireformat(zparser_conv_b64($7.str)); /* hash */
+
+	    free($1.str);
+	    free($3.str);
+	    free($5.str);
+	    free($7.str);
+    }
+    ;
+
+rdata_ipsec_base: STR sp STR sp STR sp dotted_str
+    {
+	    knot_dname_t* name = 0;
+	    zadd_rdata_wireformat(zparser_conv_byte($1.str)); /* precedence */
+	    zadd_rdata_wireformat(zparser_conv_byte($3.str));
+	    /* gateway type */
+	    zadd_rdata_wireformat(zparser_conv_byte($5.str)); /* algorithm */
+	    switch(atoi($3.str)) {
+		case IPSECKEY_NOGATEWAY:
+			zadd_rdata_wireformat(alloc_rdata_init("", 0));
+			break;
+		case IPSECKEY_IP4:
+			zadd_rdata_wireformat(zparser_conv_a($7.str));
+			break;
+		case IPSECKEY_IP6:
+			zadd_rdata_wireformat(zparser_conv_aaaa($7.str));
+			break;
+		case IPSECKEY_DNAME:
+			/* convert and insert the dname */
+			if(strlen($7.str) == 0)
+				zc_error_prev_line("IPSECKEY must specify"
+						   "gateway name");
+			name = knot_dname_new_from_wire((uint8_t*)$7.str + 1,
+							  strlen($7.str + 1),
+							  NULL);
+			if(!name) {
+				zc_error_prev_line("IPSECKEY bad gateway"
+						   "dname %s", $7.str);
+				knot_rrset_deep_free(&(parser->current_rrset),
+						                          0, 0, 0);
+				knot_zone_deep_free(&(parser->current_zone),
+						      1);
+				YYABORT;
+			}
+			if($7.str[strlen($7.str)-1] != '.') {
+			    knot_dname_t* tmpd =
+			    	knot_dname_new_from_wire(name->name,
+							   name->size,
+							   NULL);
+			    if (tmpd == NULL) {
+			    	zc_error_prev_line("Could not create dname!");
+				knot_rrset_deep_free(&(parser->current_rrset),
+				                       0, 0, 0);
+			        knot_zone_deep_free(&(parser->current_zone),
+				                      1);
+				YYABORT;
+			    }
+			    name = knot_dname_cat(tmpd,
+				    knot_node_parent(parser->origin, 0)->owner);
+			}
+
+			free($1.str);
+			free($3.str);
+			free($5.str);
+			free($7.str);
+
+			uint8_t* dncpy = malloc(sizeof(uint8_t) * name->size);
+			if (dncpy == NULL) {
+			    ERR_ALLOC_FAILED;
+			    knot_rrset_deep_free(&(parser->current_rrset),
+			                           0, 0, 0);
+			    knot_zone_deep_free(&(parser->current_zone),
+			                          1);
+			    YYABORT;
+			}
+			memcpy(dncpy, name->name, name->size);
+			zadd_rdata_wireformat((uint16_t *)dncpy);
+			//knot_dname_free(&name);
+			break;
+		default:
+			zc_error_prev_line("unknown IPSECKEY gateway type");
+	    }
+    }
+    ;
+
+rdata_ipseckey:	rdata_ipsec_base sp str_sp_seq trail
+    {
+	   zadd_rdata_wireformat(zparser_conv_b64($3.str)); /* public key */
+
+		 free($3.str);
+    }
+    | rdata_ipsec_base trail
+    ;
+
+rdata_unknown:	URR sp STR sp str_sp_seq trail
+    {
+	    /* $2 is the number of octects, currently ignored */
+	    $$ = zparser_conv_hex($5.str, $5.len);
+	    free($5.str);
+	    free($3.str);
+    }
+    |	URR sp STR trail
+    {
+	    $$ = zparser_conv_hex("", 0);
+	    free($3.str);
+    }
+    |	URR error NL
+    {
+	    $$ = zparser_conv_hex("", 0);
+    }
+    ;
+%%
+
+int zp_wrap(void)
+{
+	return 1;
+}
+
+/*
+ * Create the parser.
+ */
+zparser_type *zparser_create()
+{
+	zparser_type *result = malloc(sizeof(zparser_type));
+	if (result == NULL) {
+	    ERR_ALLOC_FAILED;
+	    return NULL;
+	}
+
+	result->temporary_items = malloc(MAXRDATALEN *
+					  sizeof(knot_rdata_item_t));
+	if (result->temporary_items == NULL) {
+		ERR_ALLOC_FAILED;
+		free(result);
+		return NULL;
+	}
+
+	result->current_rrset = knot_rrset_new(NULL, 0, 0, 0);
+	if (result->current_rrset == NULL) {
+		ERR_ALLOC_FAILED;
+		free(result->temporary_items);
+		free(result);
+		return NULL;
+	}
+
+	result->root_domain = knot_dname_new_from_str(".", 1, NULL);
+//	printf("THE NEW ROOT: %p\n", result->root_domain);
+	if (result->root_domain == NULL) {
+		ERR_ALLOC_FAILED;
+		free(result->temporary_items);
+		free(result->current_rrset);
+		free(result);
+		return NULL;
+	}
+
+	return result;
+}
+
+/*
+ * Initialize the parser for a new zone file.
+ */
+void
+zparser_init(const char *filename, uint32_t ttl, uint16_t rclass,
+	     knot_node_t *origin, knot_dname_t *origin_from_config)
+{
+	memset(nxtbits, 0, sizeof(nxtbits));
+	memset(nsecbits, 0, sizeof(nsecbits));
+	nsec_highest_rcode = 0;
+
+	parser->current_zone = NULL;
+	parser->prev_dname = NULL;
+
+	parser->default_ttl = ttl;
+	parser->default_class = rclass;
+
+	parser->origin = origin;
+	parser->prev_dname = NULL;//parser->origin->owner;
+
+	parser->default_apex = origin;
+	parser->error_occurred = 0;
+	parser->errors = 0;
+	parser->line = 1;
+	parser->filename = filename;
+	parser->rdata_count = 0;
+	parser->origin_from_config = origin_from_config;
+
+	parser->last_node = origin;
+//	parser->root_domain = NULL;
+
+	/* Create zone */
+	parser->current_zone = knot_zone_new(origin, 0, 1);
+
+	parser->node_rrsigs = NULL;
+	parser->rrsig_orphans = NULL;
+	parser->rrsig_orphan_count = 0;
+
+	parser->current_rrset->rclass = parser->default_class;
+	parser->current_rrset->rdata = NULL;
+}
+
+
+void zparser_free()
+{
+//	knot_dname_release(parser->root_domain);
+//	knot_dname_release(parser->prev_dname);
+	knot_dname_free(&parser->origin_from_config);
+	free(parser->temporary_items);
+	if (parser->current_rrset != NULL) {
+		free(parser->current_rrset);
+	}
+	free(parser);
+}
+
+void
+yyerror(void *scanner, const char *message)
+{
+	zc_error("%s", message);
+}
+
+static void
+error_va_list(unsigned line, const char *fmt, va_list args)
+{
+	if (parser->filename) {
+		fprintf(stderr, "%s:%u: ", parser->filename, line);
+	}
+	fprintf(stderr, "error: ");
+	vfprintf(stderr, fmt, args);
+	fprintf(stderr, "\n");
+
+	++parser->errors;
+	parser->error_occurred = 1;
+}
+
+/* the line counting sux, to say the least
+ * with this grose hack we try do give sane
+ * numbers back */
+void
+zc_error_prev_line(const char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+	error_va_list(parser->line - 1, fmt, args);
+	va_end(args);
+}
+
+void
+zc_error(const char *fmt, ...)
+{
+	/* send an error message to stderr */
+	va_list args;
+	va_start(args, fmt);
+	error_va_list(parser->line, fmt, args);
+	va_end(args);
+}
+
+static void
+warning_va_list(unsigned line, const char *fmt, va_list args)
+{
+	if (parser->filename) {
+		fprintf(stderr, "%s:%u: ", parser->filename, line);
+	}
+	fprintf(stderr, "warning: ");
+	vfprintf(stderr, fmt, args);
+	fprintf(stderr, "\n");
+}
+
+void
+zc_warning_prev_line(const char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+	warning_va_list(parser->line - 1, fmt, args);
+	va_end(args);
+}
+
+void
+zc_warning(const char *fmt, ... )
+{
+	va_list args;
+	va_start(args, fmt);
+	warning_va_list(parser->line, fmt, args);
+	va_end(args);
+}
+
+#ifdef NSEC3
+static void
+nsec3_add_params(const char* hashalgo_str, const char* flag_str,
+	const char* iter_str, const char* salt_str, int salt_len)
+{
+	zadd_rdata_wireformat(zparser_conv_byte(hashalgo_str));
+	zadd_rdata_wireformat(zparser_conv_byte(flag_str));
+	zadd_rdata_wireformat(zparser_conv_short(iter_str));
+
+	/* salt */
+	if(strcmp(salt_str, "-") != 0)
+		zadd_rdata_wireformat(zparser_conv_hex_length(salt_str,
+							      salt_len));
+	else
+		zadd_rdata_wireformat(alloc_rdata_init("", 1));
+
+}
+#endif /* NSEC3 */
diff --git a/tests/querytcp.c b/tests/querytcp.c
new file mode 100644
index 0000000..7e1418f
--- /dev/null
+++ b/tests/querytcp.c
@@ -0,0 +1,797 @@
+/*
+TCP query version of queryperf
+querytcp.c
+				fujiwara@jprs.co.jp
+				2009.08.12
+				version 0.4
+
+queryperf for tcp query
+
+This program measures DNS server performance of TCP query.
+
+o Running environment:
+	Development environment:
+        Linux
+		FreeBSD
+		MacOS X 10.3.4
+
+o How to make:
+    Linux:   gcc -D_LINUX -Wall -O2 -g -lm -o querytcp querytcp.c
+    FreeBSD: gcc -Wall -O2 -g -lm -o querytcp querytcp.c
+    MacOS X: gcc -Wall -O2 -g -lm -lresolv -o querytcp querytcp.c
+
+o changes
+
+  2010/6/7: Linux compatibility
+  2009/8/12: Remove use of res_mkquery
+*/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <netdb.h>
+#include <errno.h>
+#include <math.h>
+#include <err.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <math.h>
+#ifndef NO_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#ifdef __APPLE__
+#include <nameser8_compat.h>
+#endif
+
+#ifndef ns_t_soa
+#define	ns_t_soa	T_SOA
+#endif
+#ifndef ns_t_ns
+#define	ns_t_ns		T_NS
+#endif
+#ifndef ns_c_in
+#define	ns_c_in		C_IN
+#endif
+
+#ifdef NOINET6
+#undef AF_INET6
+#endif
+
+#define	Global
+
+#ifndef PACKETSZ
+#define	PACKETSZ	512
+#endif
+
+/* debug.c */
+void hexdump(char *title, unsigned char *memory, int len)
+{
+	printf("[ %s ", title);
+	while (len-- > 0)
+		printf("%02x ", *memory++);
+	printf("]\n");
+}
+
+#define Xmalloc(size)	Xrealloc(NULL, size)
+
+void *Xrealloc(void *p, int size)
+{
+	int sz;
+
+	sz = (size > 0) ? size : -size;
+	if (p == NULL) {
+		p = malloc(sz);
+	} else {
+		p = realloc(p, sz);
+	}
+	if (p == NULL) {
+		char buf[100];
+		snprintf(buf, sizeof buf, "size=%d", size);
+		perror(buf);
+		exit(1);
+	}
+	if (size < 0)
+		memset(p, 0, sz);
+	return p;
+}
+
+/* strlcpy() emulation for Linux. */
+#ifdef _LINUX
+static inline size_t strlcpy(char *destination, const char *source, size_t size)
+{
+    if(strncpy(destination, source, size) == NULL)
+        return 0;
+
+    return size;
+}
+#endif
+
+/*
+  NULL ... returns NULL
+ */
+char *Xstrdup(char *p)
+{
+	char *q;
+	int len;
+
+	if (p == NULL)
+		return NULL;
+	len = strlen(p) + 1;
+	q = Xmalloc(len);
+	strlcpy(q, p, len);
+	return q;
+}
+
+
+typedef int64_t timediff_t;
+
+/* packet buffer */
+static struct timeval current;
+static struct timeval start, send_finished;;
+static fd_set fdset0r, fdset0w;
+static int nfds;
+static struct sockaddr_storage remote;
+static int remote_len = 0;
+static int finished = 0;
+static timediff_t Timeout = 10*1000000LL;
+unsigned short counter = 0;
+
+#define	UpdateCurrentTime		gettimeofday(&current, NULL)
+
+#define	RECVBUFSIZ	65537
+#define	SENDBUFSIZ	512
+
+struct dnsheader  {
+  unsigned short id; // 2
+  unsigned char flag1, flag2; // 2
+  unsigned short qdcount, ancount, nscount, arcount; // 8
+};
+
+/*
+ +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+ |QR|   Opcode  |AA|TC|RD|RA|   Z    |   RCODE   |
+ +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
+*/
+	
+struct queries {
+	struct tcpdns {
+		unsigned short len;
+		union {
+			struct dnsheader h;
+			unsigned char dnsdata[SENDBUFSIZ];
+		} u;
+	} send;
+	unsigned char recvbuf[RECVBUFSIZ];
+	int sendlen;
+	int sent_flag:1;
+	int tcpstate:2;
+	int fd;
+	int rpos;
+	int wpos;
+	int no;
+	struct timeval sent; /* long tv_sec, long tv_usec */
+};
+
+struct queries *Queries;
+
+#define	NQUERY 100
+
+#define	TCP_NONE	0
+#define	TCP_WRITABLE	1
+#define	TCP_READABLE	2
+
+/* input */
+char *ServerName = "127.0.0.1";
+char *ServerPort = "53";
+int family = PF_UNSPEC;
+char *datafile = NULL;
+int TimeLimit = 20;
+int EDNS0 = 0;
+int DNSSEC = 0;
+int recursion = 0;
+FILE *fp = NULL;
+int datafileloop = 0;
+int verbose = 0;
+int nQueries = 120;
+int printrcode = 0;
+char *rcodestr[]= {
+	"NOERROR", "FormatError", "ServerFailure", "NameError",
+	"NotImplemented", "Reused", "RCODE06", "RCODE07",
+	"RCODE08", "RCODE09", "RCODE10", "RCODE11",
+	"RCODE12", "RCODE13", "RCODE14", "RCODE15",
+};
+
+timediff_t timediff(struct timeval *a, struct timeval *b) /* u sec */
+{
+	return (a->tv_sec - b->tv_sec) * 1000000 + (a->tv_usec - b->tv_usec);
+}
+
+#define	TIMEOUTERROR	-10000
+#define	ERROROFFSET	-20000
+#define	ERRZEROREAD	-30000
+
+uint64_t countrcode[16];
+uint64_t response_size_sum = 0;
+uint64_t response_size_sum2 = 0;
+uint64_t countanswers = 0;
+uint64_t countqueries = 0;
+uint64_t countzeroread = 0;
+uint64_t counttimeout = 0;
+uint64_t counterror = 0;
+
+int response_size_min = 0;
+int response_size_max = 0;
+
+
+
+void register_response(struct queries *q, int timeout, char *note)
+{
+	u_char *p;
+	int size;
+	int rcode;
+	int id;
+
+    id = ntohs(q->send.u.h.id);
+	if (note == NULL)
+		note = "";
+	countqueries++;
+	if (timeout >= 0) {
+		p = q->recvbuf;
+		NS_GET16(size, p);
+		response_size_sum += size;
+		response_size_sum2 += size * size;
+		if (response_size_min == 0 || response_size_min > size)
+			response_size_min = size;
+		if (response_size_max == 0 || response_size_max < size)
+			response_size_max = size;
+		rcode = p[3] & 0x0f;
+		countrcode[rcode]++;
+		countanswers++;
+		if (verbose)
+			printf("recv response id=%d rcode=%d size=%d rtt=%d\n", id, rcode, size, timeout);
+	} else if (timeout == ERRZEROREAD) {
+		countzeroread++;
+		if (verbose)
+			printf("recv response id=%d zeroread\n", id);
+	} else if (timeout == TIMEOUTERROR) {
+		counttimeout++;
+		if (verbose)
+			printf("recv timeout id=%d %lld usec\n", id, timediff(&current, &q->sent));
+	} else {
+		counterror++;
+		if (verbose) {
+			printf("recv error id=%d errno=%d at %s (%s)\n", id, ERROROFFSET - timeout, note, strerror(errno));
+		}
+	}
+#ifdef DEBUG
+    printf("%ld.%03ld no=%d fd=%d %d %s\n", q->sent.tv_sec, q->sent.tv_usec/1000, q->no, q->fd, timeout, note);
+	fflush(stdout);
+#endif
+}
+
+void output()
+{
+	double response_size_average, response_size_variance, et;
+
+	et = ((double)timediff(&current, &start))/1000000.0;
+
+	printf("elapsed time: %.3f\n", et);
+	printf("tcp qps: %.3f\n", (double)countanswers/et);
+	printf("sent: %lld\n", countqueries);
+	printf("answer: %lld  %3.1f%%\n", countanswers,
+		 (double)((double)countanswers/(double)countqueries*100.0));
+	printf("error: %lld  %3.1f%%\n", counterror,
+		 (double)((double)counterror/(double)countqueries*100.0));
+	printf("zeroread: %lld  %3.1f%%\n", countzeroread,
+		 (double)((double)countzeroread/(double)countqueries*100.0));
+	printf("timeout: %lld  %3.1f%%\n", counttimeout,
+		 (double)((double)counttimeout/(double)countqueries*100.0));
+	response_size_average = (double)response_size_sum/countanswers;
+	response_size_variance = (double)response_size_sum2 / countanswers
+		- response_size_average * response_size_average;
+	printf("response size:        %d/%.3f/%d/%.3f bytes\n", response_size_min, response_size_average, response_size_max, sqrt(response_size_variance));
+	if (printrcode) {
+		int i;
+		for (i = 0; i < 16; i++) {
+			if (countrcode[i] != 0) {
+				printf("%s %lld %5.1f\n", rcodestr[i], countrcode[i], ((double)countrcode[i])/((double)countanswers)*100.0);
+			}
+		}
+	}
+}
+
+void tcp_close(struct queries *q)
+{
+
+#ifdef DEBUG
+printf("tcp_close no=%d fd=%d\n", q->no, q->fd);
+#endif
+	if (q->fd >= 0) {
+		close(q->fd);
+		FD_CLR(q->fd, &fdset0r);
+		FD_CLR(q->fd, &fdset0w);
+	}
+	q->sent_flag = 0;
+	q->tcpstate = TCP_NONE;
+	q->fd = -1;
+}
+
+void tcp_send(struct queries *q)
+{
+	int len;
+
+	len = send(q->fd, &q->send, q->sendlen, MSG_NOSIGNAL);
+#ifdef DEBUG
+printf("tcp_send no=%d fd=%d %d:%d:%d\n", q->no, q->fd, len, q->wpos, q->sendlen);
+#endif
+	if (len < 0) {
+		if (errno == ENOTCONN) {
+printf("tcp_send no=%d fd=%d ENOTCONN return\n", q->no, q->fd);
+			return;
+		}
+		register_response(q, ERROROFFSET - errno, "tcp_send");
+		tcp_close(q);
+		return;
+	}
+	if (len != q->sendlen) {
+		register_response(q, ERROROFFSET - errno, "tcp_send:sendto");
+		tcp_close(q);
+		return;
+	}
+	FD_CLR(q->fd, &fdset0w);
+	FD_SET(q->fd, &fdset0r);
+}
+
+struct typecodes {
+	char *name;
+	int code;
+} typecodes[] = {
+	{ "A", ns_t_a },
+	{ "NS", ns_t_ns },
+	{ "SOA", ns_t_soa },
+	{ "PTR", ns_t_ptr },
+	{ "HINFO", ns_t_hinfo },
+	{ "MX", ns_t_mx },
+	{ "TXT", ns_t_txt },
+	{ "SIG", ns_t_sig },
+	{ "KEY", ns_t_key },
+	{ "AAAA", ns_t_aaaa },
+	{ "NXT", ns_t_nxt },
+	{ "SRV", ns_t_srv },
+	{ "NAPTR", ns_t_naptr },
+	{ NULL, -1 },
+};
+
+int stringtodname(unsigned char *qname, unsigned char *buff, unsigned char *lim)
+{
+	unsigned char *p, *s, *t;
+	int count, total;
+
+	t = qname;
+	p = buff;
+	total = 0;
+	for ( ;; ) {
+		s = p++;
+		count = 0;
+		if (p >= lim) return -1;
+		while (*t != 0 && *t != '.')
+			if (p < lim) {
+				*p++ = *t++;
+				count++;
+			} else
+				return -1;
+		*s = count;
+		if (count == 0)
+			break;
+		if (count > 63)
+			return -1;
+		total += count + 1;
+		if (*t == '.') t++;
+	}
+	if (total > 250 || !(*t == 0 || (*t == '.' && t[1] == 0)))
+		return -1;
+	return p - buff;
+}
+
+void send_query_error(char *mesg)
+{
+	err(1, "Packet size exceed: %s", mesg);
+}
+
+void send_query(struct queries *q)
+{
+    u_char *p, *lim;
+    char *qname;
+	int qclass;
+	int qtype;
+	int tmp;
+	struct typecodes *t = typecodes;
+	u_char buff[512];
+	static char sep[] = "\n\t ";
+	static int lineno = 0;
+
+	/*
+		SEND E[send_packet_pos]
+	 */
+	if (q->sent_flag) {
+		register_response(q, TIMEOUTERROR, "send_query");
+		tcp_close(q);
+	}
+	if (fp == NULL) {
+		qname = "version.bind";
+		qclass = ns_c_chaos;
+		qtype = ns_t_txt;
+	} else {
+		do {
+            if (fgets((char*)buff, sizeof(char)*512, fp) == NULL) {
+				if (datafileloop == 1) {
+					finished = 1;
+					fclose(fp);
+					fp = NULL;
+					return;
+				}
+				if (datafileloop > 0)
+					datafileloop--;
+				rewind(fp);
+				lineno = 0;
+                if (fgets((char*)buff, sizeof(char)*512, fp) == NULL)
+					err(1, "cannot rewind input file");
+			}
+			lineno++;
+		} while(buff[0] == '#');
+        qname = strtok((char*)buff, sep);
+        p = (u_char*) strtok(NULL, sep);
+		if (p != NULL) {
+			while(t->name != NULL) {
+                if (!strcasecmp(t->name, (char*)p))
+					break;
+				t++;
+			}
+			qtype = t->code;
+		} else {
+			qtype = ns_t_a;
+		}
+		if (qname == NULL || qtype < 0)
+			err(1, "datafile format error at line %d, qname=%s qtype=%d", lineno, qname, qtype);
+		qclass = ns_c_in;
+	}
+	q->send.u.h.id = counter++;
+	q->send.u.h.flag1 = recursion ? 1 : 0; /* Query,OP=0,AA=0,TC=0,RD=0/1 */
+	q->send.u.h.flag2 = 0;
+	q->send.u.h.qdcount = htons(1);
+	q->send.u.h.ancount = 0;
+	q->send.u.h.nscount = 0;
+	q->send.u.h.arcount = 0;
+	p = q->send.u.dnsdata + sizeof(q->send.u.h);
+	lim = p + sizeof(q->send.u.dnsdata);
+    if ((tmp = stringtodname((u_char*) qname, p, lim)) < 0)
+		send_query_error(qname);
+	p += tmp;
+	*(unsigned short *)p = htons(qtype);
+	p += sizeof(unsigned short);
+	*(unsigned short *)p = htons(qclass);
+	p += sizeof(unsigned short);
+	q->sendlen = p - q->send.u.dnsdata;
+	if (EDNS0) {
+#define EDNS0size 11
+		if (q->sendlen + EDNS0size >= sizeof(q->send.u.dnsdata))
+			send_query_error("ENDS0");
+		*p++ = 0; /* . */
+		*(unsigned short *)p = htons(ns_t_opt);
+		p += 2;
+		*(unsigned short *)p = htons(4096);
+		p += 2;
+		*p++ = 0;
+		*p++ = 0;
+		*p++ = (DNSSEC == 0) ? 0 : 0x80; /* eflag: DO bit */
+		*p++ = 0;
+		*p++ = 0;
+		*p++ = 0;
+		q->sendlen += EDNS0size;
+        p = (u_char*) &q->send.u.dnsdata;
+		q->send.u.h.ancount = htons(1);
+	}
+	q->send.len = htons(q->sendlen);
+	q->sendlen += sizeof(q->send.len);
+	q->wpos = 0;
+	q->rpos = 0;
+	q->sent = current;
+	if (verbose > 0) {
+		int id = ntohs(*(unsigned short *)&q->send.u.dnsdata);
+		printf("sending query(%s,%d,%d) id=%d %d bytes to %s\n", qname, qclass, qtype, id, q->sendlen, ServerName);
+        hexdump("sending packet header:", (unsigned char*) &q->send.u.h, 12);
+	}
+	if (q->fd > 0)
+		err(1, "q->fd > 0 but ignored\n");
+
+	q->fd = socket(remote.ss_family, SOCK_STREAM, 0);
+	tmp = fcntl(q->fd, F_GETFL, 0);
+	fcntl(q->fd, F_SETFL, O_NONBLOCK | tmp);
+	int conn_ret = connect(q->fd, (struct sockaddr *)&remote, remote_len);
+	if(conn_ret < 0 && errno != EINPROGRESS) {
+		register_response(q, ERROROFFSET - errno, "send_query:socket+fcntl+connect");
+		tcp_close(q);
+		return;
+	}
+#ifdef DEBUG
+printf("send_query no=%d fd=%d socket|connect\n", q->no, q->fd);
+#endif
+	q->tcpstate = TCP_WRITABLE;
+	FD_SET(q->fd, &fdset0w);
+	FD_CLR(q->fd, &fdset0r);
+	if (nfds <= q->fd) {
+		nfds = q->fd + 1;
+	}
+	q->sent = current;
+	q->sent_flag = 1;
+}
+
+int UpdateQuery()
+{
+	int i;
+	timediff_t t, min = Timeout;
+	struct queries *q;
+	int free = 0;
+
+	if (!finished && TimeLimit > 0) {
+		if ((t = timediff(&current, &start)) > TimeLimit * 1000000LL) {
+			finished = 1;
+			send_finished = current;
+		}
+	}
+	for(i = 0; i < nQueries; i++) {
+		q = &Queries[i];
+		if (q->sent_flag) {
+			if ((t = timediff(&current, &q->sent)) > Timeout) {
+				/* timeouted */
+				register_response(q, TIMEOUTERROR, "UpdateQuery");
+				tcp_close(q);
+			} else
+			if (t < min)
+				min = t;
+		}
+		if (!q->sent_flag) {
+			if (!finished)
+				send_query(q);
+			else
+				free++;
+		}
+	}
+	if (free == nQueries)
+		min = -1; /* finished */
+	return min;
+}
+
+char *skipname(char *p)
+{
+	while(*p > 0 && *p < 0x40) p += *p + 1;
+	if (*p == 0)
+		return p+1;
+	return p+2;
+}
+
+#define Hexdump(A,B,C)
+
+void tcp_receive(struct queries *q)
+{
+	int len, len2;
+	timediff_t tmp;
+	unsigned char *recvp;
+
+/*printf("tcp_receive %s\n", q->nameserverlabel);*/
+
+	len = read(q->fd, q->recvbuf + q->rpos, len2 = RECVBUFSIZ - q->rpos);
+	if (len < 0) {
+		if (errno == EAGAIN)
+			return;
+		register_response(q, ERROROFFSET - errno, "tcp_receive:read");
+		tcp_close(q);
+		return;
+	}
+	if (len == 0) {
+		register_response(q, ERRZEROREAD, "tcp_receive:read");
+		tcp_close(q);
+		return;
+	}
+	q->rpos += len;
+	if (q->rpos < 2)
+		return;
+	len2 = ntohs(*(unsigned short *)(q->recvbuf));
+	if (q->rpos >= len2 + 2) {
+		/* finished */
+		recvp = q->recvbuf + 2;
+		if (memcmp(recvp, q->send.u.dnsdata, 2) == 0) {
+			if ((recvp[2] & 1) == 0 /* RA bit */
+			  || (recvp[3] & 15) != 0 /* RCODE must be 0 */
+			) {
+/*
+				fprintf(stderr, "WRONG AA=%d RCODE=%d\n",
+					((recvp[2]>>2) & 1), recvp[3]&15);
+*/
+			}
+			tmp = timediff(&current, &q->sent);
+			register_response(q, tmp, "tcp_receive");
+			tcp_close(q);
+			return;
+		} else {
+printf("no=%d fd=%d unknown recv %d bytes, len=%d\n", q->no, q->fd, q->rpos, ntohs(*(unsigned short *)(q->recvbuf)));
+			hexdump("", q->recvbuf, len);
+			/*
+			fprintf(stderr, "unknown recv from %s, %d bytes %02x %02x\n", q->nameserverlabel, q->rpos, recvp[0], recvp[1]);
+			*/
+			tcp_close(q);
+		}
+	}
+}
+
+void query()
+{
+	fd_set fdsetr, fdsetw;
+	struct timeval timeout;
+	int min;
+	struct queries *q;
+	int i, n;
+	struct addrinfo hints, *res0;
+	int error;
+
+	Queries = Xmalloc(sizeof(Queries[0]) * nQueries);
+	memset(&remote, 0, sizeof(remote));
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = family;
+	hints.ai_socktype = SOCK_STREAM;
+	printf("resolving: %s:%s\n", ServerName, ServerPort);
+	error = getaddrinfo(ServerName, 0, &hints, &res0);
+	if (error) {
+		errx(1, "%s", gai_strerror(error));
+	}
+
+	/* Update server port. */
+	int port = atoi(ServerPort);
+	if (res0->ai_family == AF_INET6) {
+		struct sockaddr_in6 *ipv6 = (struct sockaddr_in6*)res0->ai_addr;
+		ipv6->sin6_port = htons(port);
+	} else {
+		struct sockaddr_in *ipv4 = (struct sockaddr_in*)res0->ai_addr;
+		ipv4->sin_port = htons(port);
+	}
+
+	remote_len = res0->ai_addrlen;
+	memcpy(&remote, res0->ai_addr, res0->ai_addrlen);
+	memset(&countrcode, 0, sizeof(countrcode));
+
+	res_init();
+	_res.options ^= ~RES_RECURSE;
+	_res.options |= RES_AAONLY;
+
+	for (i = 0; i < nQueries; i++) {
+		Queries[i].sent_flag = 0;
+		Queries[i].no = i;
+	}
+
+	FD_ZERO(&fdset0r);
+	FD_ZERO(&fdset0w);
+	nfds = 0;
+	UpdateCurrentTime;
+	start = current;
+	finished = 0;
+
+	for (;;) {
+		UpdateCurrentTime;
+		if ((min = UpdateQuery()) < 0)
+			break;
+		timeout.tv_sec = min / 1000000;
+		timeout.tv_usec = min % 1000000;
+		fdsetr = fdset0r;
+		fdsetw = fdset0w;
+		n = select(nfds, &fdsetr, &fdsetw, NULL, &timeout);
+		UpdateCurrentTime;
+		for(i = 0; i < nQueries; i++) {
+			q = &Queries[i];
+			if (q->fd < 0 || !q->sent_flag)
+				continue;
+			if (FD_ISSET(q->fd, &fdsetw)) {
+				tcp_send(q);
+			} else if (FD_ISSET(q->fd, &fdsetr)) {
+				tcp_receive(q);
+			}
+		}
+	}
+}
+
+void usage()
+{
+	fprintf(stderr, 
+"querytcp [-d datafile] [-s server_addr] [-p port] [-q num_queries] [-t timeout] [l limit] [-4] [-6] [-h]\n"
+"  -d specifies the input data file (default: stdin)\n"
+"  -s sets the server to query (default: 127.0.0.1)\n"
+"  -p sets the port on which to query the server (default: 53)\n"
+"  -q specifies the maximum number of queries outstanding (default: 120)\n"
+"  -t specifies the timeout for query completion in seconds (default: 10)\n"
+"  -l specifies how a limit for how long to run tests in seconds (no default)\n"
+"  -e enable EDNS0\n"
+"  -D set DO bit\n"
+"  -r set RD bit\n"
+"\n"
+"\n"
+"\n"
+"  -c print the number of packets with each rcode\n"
+"  -v verbose: report the RCODE of each response on stdout\n"
+"  -h print this usage\n"
+);
+	exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+	int ch, i;
+    printf("dnsheader size: %d\n", sizeof(struct dnsheader));
+	while ((ch = getopt(argc, argv, "d:s:p:q:t:l:46eDrvh")) != -1) {
+	switch (ch) {
+	case 'q':
+		nQueries = atoi(optarg);
+		if (nQueries < 1)
+			err(1, "-q requires natural number");
+		break;
+	case 'p':
+		ServerPort = Xstrdup(optarg);
+		break;
+	case 's':
+		ServerName = Xstrdup(optarg);
+		break;
+	case 'd':
+		datafile = Xstrdup(optarg);
+		if ((fp = fopen(datafile, "r")) == NULL)
+			err(1, "cannot open %s", optarg);
+		break;
+	case 't':
+		i = atoi(optarg);
+		if (i < 1)
+			err(1, "-t timeout > 0");
+		Timeout = (int64_t)i * 1000000LL;
+		break;
+	case 'l':
+		TimeLimit = atoi(optarg);
+		break;
+	case '4':
+		family = AF_INET;
+		break;
+	case '6':
+		family = AF_INET6;
+		break;
+	case 'e':
+		EDNS0 = 1;
+		break;
+	case 'D':
+		DNSSEC = 1;
+		break;
+	case 'r':
+		recursion = 1;
+		break;
+	case 'v':
+		verbose = 1;
+		break;
+	case 'c':
+		printrcode = 1;
+		break;
+	case 'h':
+	default:
+		usage();
+	}
+	}
+	argc -= optind;
+	argv += optind;
+
+	query();
+	output();
+
+	return 0;
+}
diff --git a/ylwrap b/ylwrap
new file mode 100755
index 0000000..84d5634
--- /dev/null
+++ b/ylwrap
@@ -0,0 +1,222 @@
+#! /bin/sh
+# ylwrap - wrapper for lex/yacc invocations.
+
+scriptversion=2009-04-28.21; # UTC
+
+# Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
+# 2007, 2009 Free Software Foundation, Inc.
+#
+# Written by Tom Tromey <tromey@cygnus.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+case "$1" in
+  '')
+    echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
+    exit 1
+    ;;
+  --basedir)
+    basedir=$2
+    shift 2
+    ;;
+  -h|--h*)
+    cat <<\EOF
+Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
+
+Wrapper for lex/yacc invocations, renaming files as desired.
+
+  INPUT is the input file
+  OUTPUT is one file PROG generates
+  DESIRED is the file we actually want instead of OUTPUT
+  PROGRAM is program to run
+  ARGS are passed to PROG
+
+Any number of OUTPUT,DESIRED pairs may be used.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v|--v*)
+    echo "ylwrap $scriptversion"
+    exit $?
+    ;;
+esac
+
+
+# The input.
+input="$1"
+shift
+case "$input" in
+  [\\/]* | ?:[\\/]*)
+    # Absolute path; do nothing.
+    ;;
+  *)
+    # Relative path.  Make it absolute.
+    input="`pwd`/$input"
+    ;;
+esac
+
+pairlist=
+while test "$#" -ne 0; do
+  if test "$1" = "--"; then
+    shift
+    break
+  fi
+  pairlist="$pairlist $1"
+  shift
+done
+
+# The program to run.
+prog="$1"
+shift
+# Make any relative path in $prog absolute.
+case "$prog" in
+  [\\/]* | ?:[\\/]*) ;;
+  *[\\/]*) prog="`pwd`/$prog" ;;
+esac
+
+# FIXME: add hostname here for parallel makes that run commands on
+# other machines.  But that might take us over the 14-char limit.
+dirname=ylwrap$$
+trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
+mkdir $dirname || exit 1
+
+cd $dirname
+
+case $# in
+  0) "$prog" "$input" ;;
+  *) "$prog" "$@" "$input" ;;
+esac
+ret=$?
+
+if test $ret -eq 0; then
+  set X $pairlist
+  shift
+  first=yes
+  # Since DOS filename conventions don't allow two dots,
+  # the DOS version of Bison writes out y_tab.c instead of y.tab.c
+  # and y_tab.h instead of y.tab.h. Test to see if this is the case.
+  y_tab_nodot="no"
+  if test -f y_tab.c || test -f y_tab.h; then
+    y_tab_nodot="yes"
+  fi
+
+  # The directory holding the input.
+  input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
+  # Quote $INPUT_DIR so we can use it in a regexp.
+  # FIXME: really we should care about more than `.' and `\'.
+  input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
+
+  while test "$#" -ne 0; do
+    from="$1"
+    # Handle y_tab.c and y_tab.h output by DOS
+    if test $y_tab_nodot = "yes"; then
+      if test $from = "y.tab.c"; then
+    	from="y_tab.c"
+      else
+    	if test $from = "y.tab.h"; then
+    	  from="y_tab.h"
+    	fi
+      fi
+    fi
+    if test -f "$from"; then
+      # If $2 is an absolute path name, then just use that,
+      # otherwise prepend `../'.
+      case "$2" in
+    	[\\/]* | ?:[\\/]*) target="$2";;
+    	*) target="../$2";;
+      esac
+
+      # We do not want to overwrite a header file if it hasn't
+      # changed.  This avoid useless recompilations.  However the
+      # parser itself (the first file) should always be updated,
+      # because it is the destination of the .y.c rule in the
+      # Makefile.  Divert the output of all other files to a temporary
+      # file so we can compare them to existing versions.
+      if test $first = no; then
+	realtarget="$target"
+	target="tmp-`echo $target | sed s/.*[\\/]//g`"
+      fi
+      # Edit out `#line' or `#' directives.
+      #
+      # We don't want the resulting debug information to point at
+      # an absolute srcdir; it is better for it to just mention the
+      # .y file with no path.
+      #
+      # We want to use the real output file name, not yy.lex.c for
+      # instance.
+      #
+      # We want the include guards to be adjusted too.
+      FROM=`echo "$from" | sed \
+            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
+            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
+      TARGET=`echo "$2" | sed \
+            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
+            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
+
+      sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
+          -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
+
+      # Check whether header files must be updated.
+      if test $first = no; then
+	if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
+	  echo "$2" is unchanged
+	  rm -f "$target"
+	else
+          echo updating "$2"
+          mv -f "$target" "$realtarget"
+        fi
+      fi
+    else
+      # A missing file is only an error for the first file.  This
+      # is a blatant hack to let us support using "yacc -d".  If -d
+      # is not specified, we don't want an error when the header
+      # file is "missing".
+      if test $first = yes; then
+        ret=1
+      fi
+    fi
+    shift
+    shift
+    first=no
+  done
+else
+  ret=$?
+fi
+
+# Remove the directory.
+cd ..
+rm -rf $dirname
+
+exit $ret
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End: