Make DNS callbacks return -1 on error, so invalid records are ignored

(bug #1137)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2311 65c4cc65-6c06-0410-ace0-fbb531ad65f3

dns.c

@@ -137,8 +137,10 @@ static int dns_parse_answer(void *context,
 
 		if (ntohs(ans->class) == class && ntohs(ans->rtype) == type) {
 			if (callback) {
-				if ((res = callback(context, answer, ntohs(ans->size), fullanswer)) < 0)
+				if ((res = callback(context, answer, ntohs(ans->size), fullanswer)) < 0) {
 					ast_log(LOG_WARNING, "Failed to parse result\n");
+					return -1;
+				}
 				if (res > 0)
 					return 1;
 			}

enum.c

@@ -232,8 +232,10 @@ static int enum_callback(void *context, u_char *answer, int len, u_char *fullans
 {
 	struct enum_context *c = (struct enum_context *)context;
 
-	if (parse_naptr(c->dst, c->dstlen, c->tech, c->techlen, answer, len, c->naptrinput))
+	if (parse_naptr(c->dst, c->dstlen, c->tech, c->techlen, answer, len, c->naptrinput)) {
 		ast_log(LOG_WARNING, "Failed to parse naptr :(\n");
+		return -1;
+	}
 
 	if (strlen(c->dst))
 		return 1;

srv.c

@@ -79,8 +79,10 @@ static int srv_callback(void *context, u_char *answer, int len, u_char *fullansw
 {
 	struct srv_context *c = (struct srv_context *)context;
 
-	if (parse_srv(c->host, c->hostlen, c->port, answer, len, fullanswer))
+	if (parse_srv(c->host, c->hostlen, c->port, answer, len, fullanswer)) {
 		ast_log(LOG_WARNING, "Failed to parse srv\n");
+		return -1;
+	}
 
 	if (strlen(c->host))
 		return 1;