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Diffstat (limited to 'usr/src/lib/libresolv2/common/resolv/res_query.c')
-rw-r--r--usr/src/lib/libresolv2/common/resolv/res_query.c109
1 files changed, 53 insertions, 56 deletions
diff --git a/usr/src/lib/libresolv2/common/resolv/res_query.c b/usr/src/lib/libresolv2/common/resolv/res_query.c
index b592f4e72f..ab18548c92 100644
--- a/usr/src/lib/libresolv2/common/resolv/res_query.c
+++ b/usr/src/lib/libresolv2/common/resolv/res_query.c
@@ -1,12 +1,24 @@
/*
- * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Portions Copyright (C) 2004, 2005, 2008 Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (C) 1996-2001, 2003 Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -22,7 +34,7 @@
* 4. Neither the name of the University 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 REGENTS 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
@@ -38,14 +50,14 @@
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
+ *
* 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, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
@@ -56,28 +68,9 @@
* SOFTWARE.
*/
-/*
- * Portions Copyright (c) 1996-1999 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.
- */
-
-#pragma ident "%Z%%M% %I% %E% SMI"
-
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_query.c 8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id: res_query.c,v 8.24 2003/01/31 15:25:58 vixie Exp $";
+static const char rcsid[] = "$Id: res_query.c,v 1.11 2008/11/14 02:36:51 marka Exp $";
#endif /* LIBC_SCCS and not lint */
#include "port_before.h"
@@ -104,7 +97,7 @@ static const char rcsid[] = "$Id: res_query.c,v 8.24 2003/01/31 15:25:58 vixie E
#define MAXPACKET 1024
#endif
-/*
+/*%
* Formulate a normal query, send, and await answer.
* Returned answer is placed in supplied buffer "answer".
* Perform preliminary check of answer, returning success only
@@ -116,21 +109,21 @@ static const char rcsid[] = "$Id: res_query.c,v 8.24 2003/01/31 15:25:58 vixie E
*/
int
res_nquery(res_state statp,
- const char *name, /* domain name */
- int class, int type, /* class and type of query */
- u_char *answer, /* buffer to put answer */
- int anslen) /* size of answer buffer */
+ const char *name, /*%< domain name */
+ int class, int type, /*%< class and type of query */
+ u_char *answer, /*%< buffer to put answer */
+ int anslen) /*%< size of answer buffer */
{
u_char buf[MAXPACKET];
HEADER *hp = (HEADER *) answer;
- int n;
u_int oflags;
+ u_char *rdata;
+ int n;
oflags = statp->_flags;
again:
- hp->rcode = NOERROR; /* default */
-
+ hp->rcode = NOERROR; /*%< default */
#ifdef DEBUG
if (statp->options & RES_DEBUG)
printf(";; res_query(%s, %d, %d)\n", name, class, type);
@@ -140,8 +133,14 @@ again:
buf, sizeof(buf));
#ifdef RES_USE_EDNS0
if (n > 0 && (statp->_flags & RES_F_EDNS0ERR) == 0 &&
- (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0)
+ (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC|RES_NSID))) {
n = res_nopt(statp, n, buf, sizeof(buf), anslen);
+ rdata = &buf[n];
+ if (n > 0 && (statp->options & RES_NSID) != 0U) {
+ n = res_nopt_rdata(statp, n, buf, sizeof(buf), rdata,
+ NS_OPT_NSID, 0, NULL);
+ }
+ }
#endif
if (n <= 0) {
#ifdef DEBUG
@@ -151,11 +150,12 @@ again:
RES_SET_H_ERRNO(statp, NO_RECOVERY);
return (n);
}
+
n = res_nsend(statp, buf, n, answer, anslen);
if (n < 0) {
#ifdef RES_USE_EDNS0
/* if the query choked with EDNS0, retry without EDNS0 */
- if ((statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0 &&
+ if ((statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0U &&
((oflags ^ statp->_flags) & RES_F_EDNS0ERR) != 0) {
statp->_flags |= RES_F_EDNS0ERR;
if (statp->options & RES_DEBUG)
@@ -202,7 +202,7 @@ again:
return (n);
}
-/*
+/*%
* Formulate a normal query, send, and retrieve answer in supplied buffer.
* Return the size of the response on success, -1 on error.
* If enabled, implement search rules until answer or unrecoverable failure
@@ -210,10 +210,10 @@ again:
*/
int
res_nsearch(res_state statp,
- const char *name, /* domain name */
- int class, int type, /* class and type of query */
- u_char *answer, /* buffer to put answer */
- int anslen) /* size of answer */
+ const char *name, /*%< domain name */
+ int class, int type, /*%< class and type of query */
+ u_char *answer, /*%< buffer to put answer */
+ int anslen) /*%< size of answer */
{
const char *cp, * const *domain;
HEADER *hp = (HEADER *) answer;
@@ -225,8 +225,7 @@ res_nsearch(res_state statp,
int searched = 0;
errno = 0;
- RES_SET_H_ERRNO(statp, HOST_NOT_FOUND); /* True if we never query. */
-
+ RES_SET_H_ERRNO(statp, HOST_NOT_FOUND); /*%< True if we never query. */
dots = 0;
for (cp = name; *cp != '\0'; cp++)
dots += (*cp == '.');
@@ -259,8 +258,8 @@ res_nsearch(res_state statp,
* - there is at least one dot, there is no trailing dot,
* and RES_DNSRCH is set.
*/
- if ((!dots && (statp->options & RES_DEFNAMES) != 0) ||
- (dots && !trailing_dot && (statp->options & RES_DNSRCH) != 0)) {
+ if ((!dots && (statp->options & RES_DEFNAMES) != 0U) ||
+ (dots && !trailing_dot && (statp->options & RES_DNSRCH) != 0U)) {
int done = 0;
for (domain = (const char * const *)statp->dnsrch;
@@ -318,7 +317,7 @@ res_nsearch(res_state statp,
/* if we got here for some reason other than DNSRCH,
* we only wanted one iteration of the loop, so stop.
*/
- if ((statp->options & RES_DNSRCH) == 0)
+ if ((statp->options & RES_DNSRCH) == 0U)
done++;
}
}
@@ -327,7 +326,7 @@ res_nsearch(res_state statp,
* If the query has not already been tried as is then try it
* unless RES_NOTLDQUERY is set and there were no dots.
*/
- if ((dots || !searched || (statp->options & RES_NOTLDQUERY) == 0) &&
+ if ((dots || !searched || (statp->options & RES_NOTLDQUERY) == 0U) &&
!(tried_as_is || root_on_list)) {
ret = res_nquerydomain(statp, name, NULL, class, type,
answer, anslen);
@@ -351,7 +350,7 @@ res_nsearch(res_state statp,
return (-1);
}
-/*
+/*%
* Perform a call on res_query on the concatenation of name and domain,
* removing a trailing dot from name if domain is NULL.
*/
@@ -359,9 +358,9 @@ int
res_nquerydomain(res_state statp,
const char *name,
const char *domain,
- int class, int type, /* class and type of query */
- u_char *answer, /* buffer to put answer */
- int anslen) /* size of answer */
+ int class, int type, /*%< class and type of query */
+ u_char *answer, /*%< buffer to put answer */
+ int anslen) /*%< size of answer */
{
char nbuf[MAXDNAME];
const char *longname = nbuf;
@@ -409,11 +408,7 @@ res_hostalias(const res_state statp, const char *name, char *dst, size_t siz) {
if (statp->options & RES_NOALIASES)
return (NULL);
file = getenv("HOSTALIASES");
-#ifdef SUNW_AVOIDSTDIO_FDLIMIT
- if (file == NULL || (fp = fopen(file, "rF")) == NULL)
-#else
- if (file == NULL || (fp = fopen(file, "r")) == NULL)
-#endif
+ if (file == NULL || (fp = fopen(file, "r")) == NULL)
return (NULL);
setbuf(fp, NULL);
buf[sizeof(buf) - 1] = '\0';
@@ -441,3 +436,5 @@ res_hostalias(const res_state statp, const char *name, char *dst, size_t siz) {
fclose(fp);
return (NULL);
}
+
+/*! \file */
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-15 22:38:53 +0000