Handle yet some SIP contact issue nuances and exceptions (bug #5289 with mods and rant)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6747 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -10764,11 +10764,13 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
 			ignore=1;
 		}
 	
-		extract_uri(p, req);
 		e = ast_skip_blanks(e);
 		if (sscanf(e, "%d %n", &respid, &len) != 1) {
 			ast_log(LOG_WARNING, "Invalid response: '%s'\n", e);
 		} else {
+			/* More SIP ridiculousness, we have to ignore bogus contacts in 100 etc responses */
+			if ((respid == 200) || ((respid >= 300) && (respid <= 399)))
+				extract_uri(p, req);
 			handle_response(p, respid, e + len, req, ignore, seqno);
 		}
 		return 0;