Imported Upstream version 3.14.1upstream/3.14.1

3 files changed, 1204 insertions, 0 deletions

diff --git a/plugins/imgssapi/Makefile.am b/plugins/imgssapi/Makefile.am
new file mode 100644
index 0000000..42a243f
--- /dev/null
+++ b/plugins/imgssapi/Makefile.am
@@ -0,0 +1,6 @@
+pkglib_LTLIBRARIES = imgssapi.la
+
+imgssapi_la_SOURCES = imgssapi.c
+imgssapi_la_CPPFLAGS = -I$(top_srcdir) $(pthreads_cflags)
+imgssapi_la_LDFLAGS = -module -avoid-version
+imgssapi_la_LIBADD = $(gss_libs)
diff --git a/plugins/imgssapi/Makefile.in b/plugins/imgssapi/Makefile.in
new file mode 100644
index 0000000..84e2b6e
--- /dev/null
+++ b/plugins/imgssapi/Makefile.in
@@ -0,0 +1,495 @@
+# Makefile.in generated by automake 1.10 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006  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@
+pkglibdir = $(libdir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = plugins/imgssapi
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/config.h
+CONFIG_CLEAN_FILES =
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = `echo $$p | sed -e 's|^.*/||'`;
+am__installdirs = "$(DESTDIR)$(pkglibdir)"
+pkglibLTLIBRARIES_INSTALL = $(INSTALL)
+LTLIBRARIES = $(pkglib_LTLIBRARIES)
+am__DEPENDENCIES_1 =
+imgssapi_la_DEPENDENCIES = $(am__DEPENDENCIES_1)
+am_imgssapi_la_OBJECTS = imgssapi_la-imgssapi.lo
+imgssapi_la_OBJECTS = $(am_imgssapi_la_OBJECTS)
+imgssapi_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(imgssapi_la_LDFLAGS) $(LDFLAGS) -o $@
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+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
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+	--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 $@
+SOURCES = $(imgssapi_la_SOURCES)
+DIST_SOURCES = $(imgssapi_la_SOURCES)
+ETAGS = etags
+CTAGS = ctags
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
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+F77 = @F77@
+FFLAGS = @FFLAGS@
+GREP = @GREP@
+HAVE_MYSQL_CONFIG = @HAVE_MYSQL_CONFIG@
+HAVE_PGSQL_CONFIG = @HAVE_PGSQL_CONFIG@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LDFLAGS = @LDFLAGS@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+MAKEINFO = @MAKEINFO@
+MKDIR_P = @MKDIR_P@
+OBJEXT = @OBJEXT@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
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+mysql_cflags = @mysql_cflags@
+mysql_libs = @mysql_libs@
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+prefix = @prefix@
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+psdir = @psdir@
+pthreads_cflags = @pthreads_cflags@
+pthreads_libs = @pthreads_libs@
+relp_cflags = @relp_cflags@
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+rfc3195_cflags = @rfc3195_cflags@
+rfc3195_libs = @rfc3195_libs@
+rt_libs = @rt_libs@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+snmp_cflags = @snmp_cflags@
+snmp_libs = @snmp_libs@
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+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+zlib_libs = @zlib_libs@
+pkglib_LTLIBRARIES = imgssapi.la
+imgssapi_la_SOURCES = imgssapi.c
+imgssapi_la_CPPFLAGS = -I$(top_srcdir) $(pthreads_cflags)
+imgssapi_la_LDFLAGS = -module -avoid-version
+imgssapi_la_LIBADD = $(gss_libs)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh \
+		&& exit 0; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu  plugins/imgssapi/Makefile'; \
+	cd $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu  plugins/imgssapi/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
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+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
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+	@$(NORMAL_INSTALL)
+	test -z "$(pkglibdir)" || $(MKDIR_P) "$(DESTDIR)$(pkglibdir)"
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
+	  if test -f $$p; then \
+	    f=$(am__strip_dir) \
+	    echo " $(LIBTOOL) --mode=install $(pkglibLTLIBRARIES_INSTALL) $(INSTALL_STRIP_FLAG) '$$p' '$(DESTDIR)$(pkglibdir)/$$f'"; \
+	    $(LIBTOOL) --mode=install $(pkglibLTLIBRARIES_INSTALL) $(INSTALL_STRIP_FLAG) "$$p" "$(DESTDIR)$(pkglibdir)/$$f"; \
+	  else :; fi; \
+	done
+
+uninstall-pkglibLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
+	  p=$(am__strip_dir) \
+	  echo " $(LIBTOOL) --mode=uninstall rm -f '$(DESTDIR)$(pkglibdir)/$$p'"; \
+	  $(LIBTOOL) --mode=uninstall rm -f "$(DESTDIR)$(pkglibdir)/$$p"; \
+	done
+
+clean-pkglibLTLIBRARIES:
+	-test -z "$(pkglib_LTLIBRARIES)" || rm -f $(pkglib_LTLIBRARIES)
+	@list='$(pkglib_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+imgssapi.la: $(imgssapi_la_OBJECTS) $(imgssapi_la_DEPENDENCIES) 
+	$(imgssapi_la_LINK) -rpath $(pkglibdir) $(imgssapi_la_OBJECTS) $(imgssapi_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/imgssapi_la-imgssapi.Plo@am__quote@
+
+.c.o:
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+@am__fastdepCC_TRUE@	mv -f $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(LTCOMPILE) -c -o $@ $<
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+imgssapi_la-imgssapi.lo: imgssapi.c
+@am__fastdepCC_TRUE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(imgssapi_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT imgssapi_la-imgssapi.lo -MD -MP -MF $(DEPDIR)/imgssapi_la-imgssapi.Tpo -c -o imgssapi_la-imgssapi.lo `test -f 'imgssapi.c' || echo '$(srcdir)/'`imgssapi.c
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+@am__fastdepCC_FALSE@	$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(imgssapi_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o imgssapi_la-imgssapi.lo `test -f 'imgssapi.c' || echo '$(srcdir)/'`imgssapi.c
+
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+	-rm -rf .libs _libs
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+	  done | \
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+	       END { for (i in files) print i; }'`; \
+	mkid -fID $$unique
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+
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '    { files[$$0] = 1; } \
+	       END { for (i in files) print i; }'`; \
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+	    $$tags $$unique; \
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+		$(TAGS_FILES) $(LISP)
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+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
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+	  done | \
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+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
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+
+# 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/plugins/imgssapi/imgssapi.c b/plugins/imgssapi/imgssapi.c
new file mode 100644
index 0000000..74d5d5c
--- /dev/null
+++ b/plugins/imgssapi/imgssapi.c
@@ -0,0 +1,703 @@
+/* imgssapi.c
+ * This is the implementation of the GSSAPI input module.
+ *
+ * Note: the root gssapi code was contributed by varmojfekoj and is most often
+ * maintened by him. I am just doing the plumbing around it (I event don't have a
+ * test lab for gssapi yet... ). I am very grateful for this useful code
+ * contribution -- rgerhards, 2008-03-05
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ *       works!
+ *
+ * Copyright 2007 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog 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.
+ *
+ * Rsyslog 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 Rsyslog.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <gssapi/gssapi.h>
+#include "rsyslog.h"
+#include "syslogd.h"
+#include "cfsysline.h"
+#include "module-template.h"
+#include "net.h"
+#include "srUtils.h"
+#include "gss-misc.h"
+#include "tcpsrv.h"
+#include "tcps_sess.h"
+#include "errmsg.h"
+
+
+MODULE_TYPE_INPUT
+
+/* defines */
+#define ALLOWEDMETHOD_GSS 2
+#define ALLOWEDMETHOD_TCP 1
+
+
+/* some forward definitions - they may go away when we no longer include imtcp.c */
+static rsRetVal addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal);
+static int TCPSessGSSInit(void);
+static void TCPSessGSSClose(tcps_sess_t* pSess);
+static int TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len);
+static rsRetVal onSessAccept(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+static rsRetVal OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+
+/* static data */
+DEF_IMOD_STATIC_DATA
+DEFobjCurrIf(tcpsrv)
+DEFobjCurrIf(tcps_sess)
+DEFobjCurrIf(gssutil)
+DEFobjCurrIf(errmsg)
+DEFobjCurrIf(net)
+
+static tcpsrv_t *pOurTcpsrv = NULL;  /* our TCP server(listener) TODO: change for multiple instances */
+static gss_cred_id_t gss_server_creds = GSS_C_NO_CREDENTIAL;
+
+/* our usr structure for the tcpsrv object */
+typedef struct gsssrv_s {
+	char allowedMethods;
+} gsssrv_t;
+
+/* our usr structure for the session object */
+typedef struct gss_sess_s {
+	OM_uint32 gss_flags;
+	gss_ctx_id_t gss_context;
+	char allowedMethods;
+} gss_sess_t;
+
+
+/* config variables */
+static int iTCPSessMax = 200; /* max number of sessions */
+static char *gss_listen_service_name = NULL;
+static int bPermitPlainTcp = 0; /* plain tcp syslog allowed on GSSAPI port? */
+
+
+/* methods */
+/* callbacks */
+static rsRetVal OnSessConstructFinalize(void *ppUsr)
+{
+	DEFiRet;
+	gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+	gss_sess_t *pGSess;
+
+	assert(ppGSess != NULL);
+
+	if((pGSess = calloc(1, sizeof(gss_sess_t))) == NULL)
+		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+	pGSess->gss_flags = 0;
+	pGSess->gss_context = GSS_C_NO_CONTEXT;
+	pGSess->allowedMethods = 0;
+
+	*ppGSess = pGSess;
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* Destruct the user session pointer for a GSSAPI session. Please note
+ * that it *is* valid to receive a NULL user pointer. In this case, the
+ * sessions is to be torn down before it was fully initialized. This 
+ * happens in error cases, e.g. when the host ACL did not match.
+ * rgerhards, 2008-03-03
+ */
+static rsRetVal
+OnSessDestruct(void *ppUsr)
+{
+	DEFiRet;
+	gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+
+	assert(ppGSess != NULL);
+	if(*ppGSess == NULL)
+		FINALIZE;
+
+	if((*ppGSess)->allowedMethods & ALLOWEDMETHOD_GSS) {
+		OM_uint32 maj_stat, min_stat;
+		maj_stat = gss_delete_sec_context(&min_stat, &(*ppGSess)->gss_context, GSS_C_NO_BUFFER);
+		if (maj_stat != GSS_S_COMPLETE)
+			gssutil.display_status("deleting context", maj_stat, min_stat);
+	}
+
+	free(*ppGSess);
+	*ppGSess = NULL;
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* Check if the host is permitted to send us messages.
+ * Note: the pUsrSess may be zero if the server is running in tcp-only mode!
+ */
+static int
+isPermittedHost(struct sockaddr *addr, char *fromHostFQDN, void *pUsrSrv, void*pUsrSess)
+{
+	gsssrv_t *pGSrv;
+	gss_sess_t *pGSess;
+	char allowedMethods = 0;
+
+	BEGINfunc
+	assert(pUsrSrv != NULL);
+	pGSrv = (gsssrv_t*) pUsrSrv;
+	pGSess = (gss_sess_t*) pUsrSess;
+
+	if((pGSrv->allowedMethods & ALLOWEDMETHOD_TCP) &&
+	   net.isAllowedSender(net.pAllowedSenders_TCP, addr, (char*)fromHostFQDN))
+		allowedMethods |= ALLOWEDMETHOD_TCP;
+	if((pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) &&
+	   net.isAllowedSender(net.pAllowedSenders_GSS, addr, (char*)fromHostFQDN))
+		allowedMethods |= ALLOWEDMETHOD_GSS;
+	if(allowedMethods && pGSess != NULL)
+		pGSess->allowedMethods = allowedMethods;
+	ENDfunc
+	return allowedMethods;
+}
+
+static rsRetVal
+onSessAccept(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gsssrv_t *pGSrv;
+	
+	pGSrv = (gsssrv_t*) pThis->pUsr;
+
+	if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+		iRet = OnSessAcceptGSS(pThis, pSess);
+	} 
+
+	RETiRet;
+}
+
+
+static rsRetVal
+onRegularClose(tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+		TCPSessGSSClose(pSess);
+	else {
+		/* process any incomplete frames left over */
+		tcps_sess.PrepareClose(pSess);
+		/* Session closed */
+		tcps_sess.Close(pSess);
+	}
+	RETiRet;
+}
+
+
+static rsRetVal
+onErrClose(tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+		TCPSessGSSClose(pSess);
+	else
+		tcps_sess.Close(pSess);
+
+	RETiRet;
+}
+
+
+/* open the listen sockets */
+static int*
+doOpenLstnSocks(tcpsrv_t *pSrv)
+{
+	int *pRet = NULL;
+	gsssrv_t *pGSrv;
+
+	ISOBJ_TYPE_assert(pSrv, tcpsrv);
+	pGSrv = pSrv->pUsr;
+	assert(pGSrv != NULL);
+
+	/* first apply some config settings */
+	if(pGSrv->allowedMethods) {
+		if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+			if(TCPSessGSSInit()) {
+				errmsg.LogError(NO_ERRCODE, "GSS-API initialization failed\n");
+				pGSrv->allowedMethods &= ~(ALLOWEDMETHOD_GSS);
+			}
+		}
+		if(pGSrv->allowedMethods) {
+			/* fallback to plain TCP */
+			if((pRet =  tcpsrv.create_tcp_socket(pSrv)) != NULL) {
+				dbgprintf("Opened %d syslog TCP port(s).\n", *pRet);
+			}
+		}
+	}
+
+	return pRet;
+}
+
+
+static int
+doRcvData(tcps_sess_t *pSess, char *buf, size_t lenBuf)
+{
+	int state;
+	int allowedMethods;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	allowedMethods = pGSess->allowedMethods;
+	if(allowedMethods & ALLOWEDMETHOD_GSS)
+		state = TCPSessGSSRecv(pSess, buf, lenBuf);
+	else
+		state = recv(pSess->sock, buf, lenBuf, 0);
+	return state;
+}
+
+
+/* end callbacks */
+
+static rsRetVal
+addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
+{
+	DEFiRet;
+	gsssrv_t *pGSrv;
+
+	if(pOurTcpsrv == NULL) {
+		/* first create/init the gsssrv "object" */
+		if((pGSrv = calloc(1, sizeof(gsssrv_t))) == NULL)
+			ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+		pGSrv->allowedMethods = ALLOWEDMETHOD_GSS;
+		if(bPermitPlainTcp)
+			pGSrv->allowedMethods |= ALLOWEDMETHOD_TCP;
+		/* gsssrv initialized */
+
+		CHKiRet(tcpsrv.Construct(&pOurTcpsrv));
+		CHKiRet(tcpsrv.SetUsrP(pOurTcpsrv, pGSrv));
+		CHKiRet(tcpsrv.SetCBOnSessConstructFinalize(pOurTcpsrv, OnSessConstructFinalize));
+		CHKiRet(tcpsrv.SetCBOnSessDestruct(pOurTcpsrv, OnSessDestruct));
+		CHKiRet(tcpsrv.SetCBIsPermittedHost(pOurTcpsrv, isPermittedHost));
+		CHKiRet(tcpsrv.SetCBRcvData(pOurTcpsrv, doRcvData));
+		CHKiRet(tcpsrv.SetCBOpenLstnSocks(pOurTcpsrv, doOpenLstnSocks));
+		CHKiRet(tcpsrv.SetCBOnSessAccept(pOurTcpsrv, onSessAccept));
+		CHKiRet(tcpsrv.SetCBOnRegularClose(pOurTcpsrv, onRegularClose));
+		CHKiRet(tcpsrv.SetCBOnErrClose(pOurTcpsrv, onErrClose));
+		tcpsrv.configureTCPListen(pOurTcpsrv, (char *) pNewVal);
+		CHKiRet(tcpsrv.ConstructFinalize(pOurTcpsrv));
+	}
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed */
+static int TCPSessGSSInit(void)
+{
+	gss_buffer_desc name_buf;
+	gss_name_t server_name;
+	OM_uint32 maj_stat, min_stat;
+
+	if (gss_server_creds != GSS_C_NO_CREDENTIAL)
+		return 0;
+
+	name_buf.value = (gss_listen_service_name == NULL) ? "host" : gss_listen_service_name;
+	name_buf.length = strlen(name_buf.value) + 1;
+	maj_stat = gss_import_name(&min_stat, &name_buf, GSS_C_NT_HOSTBASED_SERVICE, &server_name);
+	if (maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status("importing name", maj_stat, min_stat);
+		return -1;
+	}
+
+	maj_stat = gss_acquire_cred(&min_stat, server_name, 0,
+				    GSS_C_NULL_OID_SET, GSS_C_ACCEPT,
+				    &gss_server_creds, NULL, NULL);
+	if (maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status("acquiring credentials", maj_stat, min_stat);
+		return -1;
+	}
+
+	gss_release_name(&min_stat, &server_name);
+	dbgprintf("GSS-API initialized\n");
+	return 0;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed 
+ * tries to guess if the connection uses gssapi.
+ */
+static rsRetVal
+OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_buffer_desc send_tok, recv_tok;
+	gss_name_t client;
+	OM_uint32 maj_stat, min_stat, acc_sec_min_stat;
+	gss_ctx_id_t *context;
+	OM_uint32 *sess_flags;
+	int fdSess;
+	char allowedMethods;
+	gsssrv_t *pGSrv;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+
+	pGSrv = (gsssrv_t*) pThis->pUsr;
+	pGSess = (gss_sess_t*) pSess->pUsr;
+	allowedMethods = pGSrv->allowedMethods;
+	if(allowedMethods & ALLOWEDMETHOD_GSS) {
+		/* Buffer to store raw message in case that
+		 * gss authentication fails halfway through.
+		 */
+		char buf[MAXLINE];
+		int ret = 0;
+
+		dbgprintf("GSS-API Trying to accept TCP session %p\n", pSess);
+
+		fdSess = pSess->sock; // TODO: method access!
+		if (allowedMethods & ALLOWEDMETHOD_TCP) {
+			int len;
+			fd_set  fds;
+			struct timeval tv;
+		
+			do {
+				FD_ZERO(&fds);
+				FD_SET(fdSess, &fds);
+				tv.tv_sec = 1;
+				tv.tv_usec = 0;
+				ret = select(fdSess + 1, &fds, NULL, NULL, &tv);
+			} while (ret < 0 && errno == EINTR);
+			if (ret < 0) {
+				errmsg.LogError(NO_ERRCODE, "TCP session %p will be closed, error ignored\n", pSess);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			} else if (ret == 0) {
+				dbgprintf("GSS-API Reverting to plain TCP\n");
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			}
+
+			do {
+				ret = recv(fdSess, buf, sizeof (buf), MSG_PEEK);
+			} while (ret < 0 && errno == EINTR);
+			if (ret <= 0) {
+				if (ret == 0)
+					dbgprintf("GSS-API Connection closed by peer\n");
+				else
+					errmsg.LogError(NO_ERRCODE, "TCP(GSS) session %p will be closed, error ignored\n", pSess);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+
+			if (ret < 4) {
+				dbgprintf("GSS-API Reverting to plain TCP\n");
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			} else if (ret == 4) {
+				/* The client might has been interupted after sending
+				 * the data length (4B), give him another chance.
+				 */
+				srSleep(1, 0);
+				do {
+					ret = recv(fdSess, buf, sizeof (buf), MSG_PEEK);
+				} while (ret < 0 && errno == EINTR);
+				if (ret <= 0) {
+					if (ret == 0)
+						dbgprintf("GSS-API Connection closed by peer\n");
+					else
+						errmsg.LogError(NO_ERRCODE, "TCP session %p will be closed, error ignored\n", pSess);
+					ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+				}
+			}
+
+			/* TODO: how does this work together with IPv6? Does it? */
+			len = ntohl((buf[0] << 24)
+				    | (buf[1] << 16)
+				    | (buf[2] << 8)
+				    | buf[3]);
+			if ((ret - 4) < len || len == 0) {
+				dbgprintf("GSS-API Reverting to plain TCP\n");
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			}
+		}
+
+		context = &pGSess->gss_context;
+		*context = GSS_C_NO_CONTEXT;
+		sess_flags = &pGSess->gss_flags;
+		do {
+			if (gssutil.recv_token(fdSess, &recv_tok) <= 0) {
+				errmsg.LogError(NO_ERRCODE, "TCP session %p will be closed, error ignored\n", pSess);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+			maj_stat = gss_accept_sec_context(&acc_sec_min_stat, context, gss_server_creds,
+							  &recv_tok, GSS_C_NO_CHANNEL_BINDINGS, &client,
+							  NULL, &send_tok, sess_flags, NULL, NULL);
+			if (recv_tok.value) {
+				free(recv_tok.value);
+				recv_tok.value = NULL;
+			}
+			if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED) {
+				gss_release_buffer(&min_stat, &send_tok);
+				if (*context != GSS_C_NO_CONTEXT)
+					gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+				if ((allowedMethods & ALLOWEDMETHOD_TCP) && 
+				    (GSS_ROUTINE_ERROR(maj_stat) == GSS_S_DEFECTIVE_TOKEN)) {
+					dbgprintf("GSS-API Reverting to plain TCP\n");
+					dbgprintf("tcp session socket with new data: #%d\n", fdSess);
+					if(tcps_sess.DataRcvd(pSess, buf, ret) != RS_RET_OK) {
+						errmsg.LogError(NO_ERRCODE, "Tearing down TCP Session %p - see "
+							    "previous messages for reason(s)\n", pSess);
+						ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+					}
+					pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+					ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+				}
+				gssutil.display_status("accepting context", maj_stat, acc_sec_min_stat);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+			if (send_tok.length != 0) {
+				if(gssutil.send_token(fdSess, &send_tok) < 0) {
+					gss_release_buffer(&min_stat, &send_tok);
+					errmsg.LogError(NO_ERRCODE, "TCP session %p will be closed, error ignored\n", pSess);
+					if (*context != GSS_C_NO_CONTEXT)
+						gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+					ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+				}
+				gss_release_buffer(&min_stat, &send_tok);
+			}
+		} while (maj_stat == GSS_S_CONTINUE_NEEDED);
+
+		maj_stat = gss_display_name(&min_stat, client, &recv_tok, NULL);
+		if (maj_stat != GSS_S_COMPLETE)
+			gssutil.display_status("displaying name", maj_stat, min_stat);
+		else
+			dbgprintf("GSS-API Accepted connection from: %s\n", (char*) recv_tok.value);
+		gss_release_name(&min_stat, &client);
+		gss_release_buffer(&min_stat, &recv_tok);
+
+		dbgprintf("GSS-API Provided context flags:\n");
+		gssutil.display_ctx_flags(*sess_flags);
+		pGSess->allowedMethods = ALLOWEDMETHOD_GSS;
+	}
+	
+finalize_it:
+	RETiRet;
+}
+
+
+/* returns: number of bytes read or -1 on error
+ * Replaces recv() for gssapi connections.
+ */
+int TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len)
+{
+	gss_buffer_desc xmit_buf, msg_buf;
+	gss_ctx_id_t *context;
+	OM_uint32 maj_stat, min_stat;
+	int fdSess;
+	int     conf_state;
+	int state, len;
+	gss_sess_t *pGSess;
+
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	fdSess = pSess->sock;
+	if ((state = gssutil.recv_token(fdSess, &xmit_buf)) <= 0)
+		return state;
+
+	context = &pGSess->gss_context;
+	maj_stat = gss_unwrap(&min_stat, *context, &xmit_buf, &msg_buf,
+			      &conf_state, (gss_qop_t *) NULL);
+	if(maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status("unsealing message", maj_stat, min_stat);
+		if(xmit_buf.value) {
+			free(xmit_buf.value);
+			xmit_buf.value = 0;
+		}
+		return (-1);
+	}
+	if (xmit_buf.value) {
+		free(xmit_buf.value);
+		xmit_buf.value = 0;
+	}
+
+	len = msg_buf.length < buf_len ? msg_buf.length : buf_len;
+	memcpy(buf, msg_buf.value, len);
+	gss_release_buffer(&min_stat, &msg_buf);
+
+	return len;
+}
+
+
+/* Takes care of cleaning up gssapi stuff and then calls
+ * TCPSessClose().
+ */
+void TCPSessGSSClose(tcps_sess_t* pSess)
+{
+	OM_uint32 maj_stat, min_stat;
+	gss_ctx_id_t *context;
+	gss_sess_t *pGSess;
+
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	context = &pGSess->gss_context;
+	maj_stat = gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+	if (maj_stat != GSS_S_COMPLETE)
+		gssutil.display_status("deleting context", maj_stat, min_stat);
+	*context = GSS_C_NO_CONTEXT;
+	pGSess->gss_flags = 0;
+	pGSess->allowedMethods = 0;
+
+	tcps_sess.Close(pSess);
+}
+
+
+/* Counterpart of TCPSessGSSInit(). This is called to exit the GSS system
+ * at all. It is a server-based session exit. 
+ */
+static rsRetVal
+TCPSessGSSDeinit(void)
+{
+	DEFiRet;
+	OM_uint32 maj_stat, min_stat;
+
+	if (gss_server_creds != GSS_C_NO_CREDENTIAL) {
+		maj_stat = gss_release_cred(&min_stat, &gss_server_creds);
+		if (maj_stat != GSS_S_COMPLETE)
+			gssutil.display_status("releasing credentials", maj_stat, min_stat);
+	}
+	RETiRet;
+}
+
+/* This function is called to gather input.
+ */
+BEGINrunInput
+CODESTARTrunInput
+	iRet = tcpsrv.Run(pOurTcpsrv);
+ENDrunInput
+
+
+/* initialize and return if will run or not */
+BEGINwillRun
+CODESTARTwillRun
+	if(pOurTcpsrv == NULL)
+		ABORT_FINALIZE(RS_RET_NO_RUN);
+
+	net.PrintAllowedSenders(2); /* TCP */
+	net.PrintAllowedSenders(3); /* GSS */
+finalize_it:
+ENDwillRun
+
+
+
+BEGINmodExit
+CODESTARTmodExit
+	if(pOurTcpsrv != NULL)
+		iRet = tcpsrv.Destruct(&pOurTcpsrv);
+	TCPSessGSSDeinit();
+
+	/* release objects we used */
+	objRelease(tcps_sess, LM_TCPSRV_FILENAME);
+	objRelease(tcpsrv, LM_TCPSRV_FILENAME);
+	objRelease(gssutil, LM_GSSUTIL_FILENAME);
+	objRelease(errmsg, CORE_COMPONENT);
+	objRelease(net, LM_NET_FILENAME);
+ENDmodExit
+
+
+BEGINafterRun
+CODESTARTafterRun
+	/* do cleanup here */
+	if (net.pAllowedSenders_TCP != NULL) {
+		net.clearAllowedSenders (net.pAllowedSenders_TCP);
+		net.pAllowedSenders_TCP = NULL;
+	}
+	if (net.pAllowedSenders_GSS != NULL) {
+		net.clearAllowedSenders (net.pAllowedSenders_GSS);
+		net.pAllowedSenders_GSS = NULL;
+	}
+ENDafterRun
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+ENDqueryEtryPt
+
+
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+{
+	if (gss_listen_service_name != NULL) {
+		free(gss_listen_service_name);
+		gss_listen_service_name = NULL;
+	}
+	bPermitPlainTcp = 0;
+	iTCPSessMax = 200;
+	return RS_RET_OK;
+}
+
+
+BEGINmodInit()
+CODESTARTmodInit
+	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current definition */
+CODEmodInit_QueryRegCFSLineHdlr
+	pOurTcpsrv = NULL;
+	/* request objects we use */
+	CHKiRet(objUse(tcps_sess, LM_TCPSRV_FILENAME));
+	CHKiRet(objUse(tcpsrv, LM_TCPSRV_FILENAME));
+	CHKiRet(objUse(gssutil, LM_GSSUTIL_FILENAME));
+	CHKiRet(objUse(errmsg, CORE_COMPONENT));
+	CHKiRet(objUse(net, LM_NET_FILENAME));
+
+	/* register config file handlers */
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverpermitplaintcp", 0, eCmdHdlrBinary,
+				   NULL, &bPermitPlainTcp, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverrun", 0, eCmdHdlrGetWord,
+				   addGSSListener, NULL, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverservicename", 0, eCmdHdlrGetWord,
+				   NULL, &gss_listen_service_name, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssservermaxsessions", 0, eCmdHdlrInt,
+				   NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
+		resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
+ENDmodInit
+
+/* vim:set ai:
+ */