TCP not matching valid peer.

find_peer() does not find a valid peer when using pvt->recv as the sockaddr_in argument.  Because of the way TCP works, the port number in pvt->recv is not what we're looking for at all.  There is currently only one place that find_peer searches for a peer using the sockaddr_in argument.  If the peer is not found after using pvt->recv (works for UDP since the port number will be correct), a temp sockaddr_in struct is made using the Contact header in the sip_request.  This has the correct port number in it.

Review: http://reviewboard.digium.com/r/236/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@193387 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -13420,6 +13420,22 @@ static enum check_auth_result check_peer_ok(struct sip_pvt *p, char *of,
 		if (!peer) {
 			peer = find_peer(NULL, &p->recv, TRUE, FINDPEERS, FALSE);
 		}
+
+		/* If the peer is still not found, try the address and port from the
+		 * contact header.  If the transport type is TCP or TLS it is not possible
+		 * to find the peer using p->recv. Because of the way TCP works, the received
+		 * packet's destination port will not match the one the peer table is
+		 * built with. */
+		if (!peer && (p->socket.type != SIP_TRANSPORT_UDP)) {
+			struct sockaddr_in tmpsin;
+			char contact[SIPBUFSIZE];
+			char *tmp;
+			memcpy(&tmpsin, &p->recv, sizeof(tmpsin));
+			ast_copy_string(contact, get_header(req, "Contact"), sizeof(contact));
+			tmp = get_in_brackets(contact);
+			__set_address_from_contact(tmp, &tmpsin, 1);
+			peer = find_peer(NULL, &tmpsin, TRUE, FINDPEERS, FALSE);
+		}
 	}
 
 	if (!peer) {