vendor/bind9/9.3.5

3 files changed, 51 insertions, 26 deletions

diff --git a/lib/bind/resolv/res_data.c b/lib/bind/resolv/res_data.c
index 204e03d685f4e..1b9078cffdb54 100644
--- a/lib/bind/resolv/res_data.c
+++ b/lib/bind/resolv/res_data.c
@@ -16,7 +16,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: res_data.c,v 1.1.206.2 2004/03/16 12:34:18 marka Exp $";
+static const char rcsid[] = "$Id: res_data.c,v 1.1.206.3 2007/09/14 05:35:51 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 1.1.206.2 2004/03/16 12:34:18 mar
 #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/bind/resolv/res_init.c b/lib/bind/resolv/res_init.c
index fd82e87203c05..22ad874da738a 100644
--- a/lib/bind/resolv/res_init.c
+++ b/lib/bind/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 1.9.2.5.4.6 2006/08/30 23:23:01 marka Exp $";
+static const char rcsid[] = "$Id: res_init.c,v 1.9.2.5.4.8 2007/07/09 01:54:03 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
diff --git a/lib/bind/resolv/res_send.c b/lib/bind/resolv/res_send.c
index c47dd49bc6e8b..bc3cc923814aa 100644
--- a/lib/bind/resolv/res_send.c
+++ b/lib/bind/resolv/res_send.c
@@ -70,7 +70,7 @@
 
 #if defined(LIBC_SCCS) && !defined(lint)
 static const char sccsid[] = "@(#)res_send.c	8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id: res_send.c,v 1.5.2.2.4.9 2006/10/16 23:00:50 marka Exp $";
+static const char rcsid[] = "$Id: res_send.c,v 1.5.2.2.4.11 2008/01/27 02:06:07 marka Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 /*
@@ -288,7 +288,7 @@ int
 res_nsend(res_state statp,
 	  const u_char *buf, int buflen, u_char *ans, int anssiz)
 {
-	int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
+	int gotsomewhere, terrno, tries, v_circuit, resplen, ns, n;
 	char abuf[NI_MAXHOST];
 
 #ifdef USE_POLL
@@ -400,7 +400,7 @@ res_nsend(res_state statp,
 	/*
 	 * Send request, RETRY times, or until successful.
 	 */
-	for (try = 0; try < statp->retry; try++) {
+	for (tries = 0; tries < statp->retry; tries++) {
 	    for (ns = 0; ns < statp->nscount; ns++) {
 		struct sockaddr *nsap;
 		int nsaplen;
@@ -448,7 +448,7 @@ res_nsend(res_state statp,
 
 		if (v_circuit) {
 			/* Use VC; at most one attempt per server. */
-			try = statp->retry;
+			tries = statp->retry;
 			n = send_vc(statp, buf, buflen, ans, anssiz, &terrno,
 				    ns);
 			if (n < 0)
@@ -459,7 +459,7 @@ res_nsend(res_state statp,
 		} else {
 			/* Use datagrams. */
 			n = send_dg(statp, buf, buflen, ans, anssiz, &terrno,
-				    ns, try, &v_circuit, &gotsomewhere);
+				    ns, tries, &v_circuit, &gotsomewhere);
 			if (n < 0)
 				goto fail;
 			if (n == 0)
@@ -596,6 +596,9 @@ send_vc(res_state statp,
 	u_short len;
 	u_char *cp;
 	void *tmp;
+#ifdef SO_NOSIGPIPE
+	int on = 1;
+#endif
 
 	nsap = get_nsaddr(statp, ns);
 	nsaplen = get_salen(nsap);
@@ -641,6 +644,17 @@ send_vc(res_state statp,
 				return (-1);
 			}
 		}
+#ifdef SO_NOSIGPIPE
+		/*
+		 * Disable generation of SIGPIPE when writing to a closed
+		 * socket.  Write should return -1 and set errno to EPIPE
+		 * instead. 
+		 *
+		 * Push on even if setsockopt(SO_NOSIGPIPE) fails.
+		 */
+		(void)setsockopt(statp->_vcsock, SOL_SOCKET, SO_NOSIGPIPE, &on,
+			         sizeof(on));
+#endif
 		errno = 0;
 		if (connect(statp->_vcsock, nsap, nsaplen) < 0) {
 			*terrno = errno;
@@ -768,7 +782,7 @@ send_vc(res_state statp,
 
 static int
 send_dg(res_state statp, const u_char *buf, int buflen, u_char *ans,
-	int anssiz, int *terrno, int ns, int try, int *v_circuit,
+	int anssiz, int *terrno, int ns, int tries, int *v_circuit,
 	int *gotsomewhere)
 {
 	const HEADER *hp = (const HEADER *) buf;
@@ -850,7 +864,7 @@ send_dg(res_state statp, const u_char *buf, int buflen, u_char *ans,
 	/*
 	 * Wait for reply.
 	 */
-	seconds = (statp->retrans << try);
+	seconds = (statp->retrans << tries);
 	if (ns > 0)
 		seconds /= statp->nscount;
 	if (seconds <= 0)