Vendor import of BIND 9.4.2vendor/resolver/9.4.2

3 files changed, 32 insertions, 21 deletions

diff --git a/lib/libc/nameser/ns_parse.c b/lib/libc/nameser/ns_parse.c
index 5e7998d6c81c..c4658d8633dd 100644
--- a/lib/libc/nameser/ns_parse.c
+++ b/lib/libc/nameser/ns_parse.c
@@ -16,7 +16,7 @@
  */
 
 #ifndef lint
-static const char rcsid[] = "$Id: ns_parse.c,v 1.5.18.3 2005/10/11 00:25:10 marka Exp $";
+static const char rcsid[] = "$Id: ns_parse.c,v 1.5.18.4 2007/08/27 03:34:24 marka Exp $";
 #endif
 
 /* Import. */
@@ -40,7 +40,7 @@ static void	setsection(ns_msg *msg, ns_sect sect);
 
 /* Macros. */
 
-#ifndef SOLARIS2
+#if !defined(SOLARIS2) || defined(__COVERITY__)
 #define RETERR(err) do { errno = (err); return (-1); } while (0)
 #else
 #define RETERR(err) \
diff --git a/lib/libc/resolv/res_data.c b/lib/libc/resolv/res_data.c
index e3dcbf04361e..736315cc4186 100644
--- a/lib/libc/resolv/res_data.c
+++ b/lib/libc/resolv/res_data.c
@@ -16,7 +16,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: res_data.c,v 1.3.18.1 2005/04/27 05:01:10 sra Exp $";
+static const char rcsid[] = "$Id: res_data.c,v 1.3.18.2 2007/09/14 05:35:47 marka Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include "port_before.h"
@@ -40,7 +40,6 @@ static const char rcsid[] = "$Id: res_data.c,v 1.3.18.1 2005/04/27 05:01:10 sra
 #include <unistd.h>
 
 #include "port_after.h"
-#undef _res
 
 const char *_res_opcodes[] = {
 	"QUERY",
@@ -70,6 +69,7 @@ const char *_res_sectioncodes[] = {
 };
 #endif
 
+#undef _res
 #ifndef __BIND_NOSTATIC
 struct __res_state _res
 # if defined(__BIND_RES_TEXT)
@@ -77,6 +77,10 @@ struct __res_state _res
 # endif
         ;
 
+#if defined(DO_PTHREADS) || defined(__linux)
+#define _res (*__res_state())
+#endif
+
 /* Proto. */
 
 int  res_ourserver_p(const res_state, const struct sockaddr_in *);
diff --git a/lib/libc/resolv/res_init.c b/lib/libc/resolv/res_init.c
index 013a3caed261..f580b9cc0642 100644
--- a/lib/libc/resolv/res_init.c
+++ b/lib/libc/resolv/res_init.c
@@ -70,7 +70,7 @@
 
 #if defined(LIBC_SCCS) && !defined(lint)
 static const char sccsid[] = "@(#)res_init.c	8.1 (Berkeley) 6/7/93";
-static const char rcsid[] = "$Id: res_init.c,v 1.16.18.5 2006/08/30 23:23:13 marka Exp $";
+static const char rcsid[] = "$Id: res_init.c,v 1.16.18.7 2007/07/09 01:52:58 marka Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include "port_before.h"
@@ -166,7 +166,9 @@ __res_vinit(res_state statp, int preinit) {
 #endif
 	int dots;
 	union res_sockaddr_union u[2];
+	int maxns = MAXNS;
 
+	RES_SET_H_ERRNO(statp, 0);
 	if (statp->_u._ext.ext != NULL)
 		res_ndestroy(statp);
 
@@ -216,8 +218,22 @@ __res_vinit(res_state statp, int preinit) {
 		statp->_u._ext.ext->nsaddrs[0].sin = statp->nsaddr;
 		strcpy(statp->_u._ext.ext->nsuffix, "ip6.arpa");
 		strcpy(statp->_u._ext.ext->nsuffix2, "ip6.int");
-	} else
-		return (-1);
+	} else {
+		/*
+		 * Historically res_init() rarely, if at all, failed.
+		 * Examples and applications exist which do not check
+		 * our return code.  Furthermore several applications
+		 * simply call us to get the systems domainname.  So
+		 * rather then immediately fail here we store the
+		 * failure, which is returned later, in h_errno.  And
+		 * prevent the collection of 'nameserver' information
+		 * by setting maxns to 0.  Thus applications that fail
+		 * to check our return code wont be able to make
+		 * queries anyhow.
+		 */
+		RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
+		maxns = 0;
+	}
 #ifdef RESOLVSORT
 	statp->nsort = 0;
 #endif
@@ -238,9 +254,9 @@ __res_vinit(res_state statp, int preinit) {
 				buf[0] = '.';
 			cp = strchr(buf, '.');
 			cp = (cp == NULL) ? buf : (cp + 1);
-			if (strlen(cp) >= sizeof(statp->defdname))
-				goto freedata; 
-			strcpy(statp->defdname, cp);
+			strncpy(statp->defdname, cp,
+				sizeof(statp->defdname) - 1);
+			statp->defdname[sizeof(statp->defdname) - 1] = '\0';
 		}
 	}
 #endif	/* SOLARIS2 */
@@ -346,7 +362,7 @@ __res_vinit(res_state statp, int preinit) {
 		    continue;
 		}
 		/* read nameservers to query */
-		if (MATCH(buf, "nameserver") && nserv < MAXNS) {
+		if (MATCH(buf, "nameserver") && nserv < maxns) {
 		    struct addrinfo hints, *ai;
 		    char sbuf[NI_MAXSERV];
 		    const size_t minsiz =
@@ -482,16 +498,7 @@ __res_vinit(res_state statp, int preinit) {
 	if ((cp = getenv("RES_OPTIONS")) != NULL)
 		res_setoptions(statp, cp, "env");
 	statp->options |= RES_INIT;
-	return (0);
-
-#ifdef	SOLARIS2
- freedata:
-	if (statp->_u._ext.ext != NULL) {
-		free(statp->_u._ext.ext);
-		statp->_u._ext.ext = NULL;
-	}
-	return (-1);
-#endif
+	return (statp->res_h_errno);
 }
 
 static void