Fix a bug where our Motif ICE candidates were not quite proper, and make us more forgiving.

An issue was reported on the mailing list where calling would result in an "Incomplete
ICE-UDP candidate received on session" error message. This is the result of the ICE-UDP
candidate code not placing a "network" attribute within the candidates. This is now done.
To increase compatibility though I have removed the requirement for the "network" attribute
to exist within ICE-UDP candidates that are received since we don't actually require the
value.

Reported on the mailing list by Jean-Denis Girard.
........

Merged revisions 375925 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@375926 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_motif.c

@@ -783,6 +783,7 @@ static int jingle_add_ice_udp_candidates_to_transport(struct ast_rtp_instance *r
 		snprintf(tmp, sizeof(tmp), "%d", ast_str_hash(candidate->foundation));
 		iks_insert_attrib(local_candidate, "foundation", tmp);
 		iks_insert_attrib(local_candidate, "generation", "0");
+		iks_insert_attrib(local_candidate, "network", "0");
 		snprintf(tmp, sizeof(tmp), "%04lx", ast_random() & 0xffff);
 		iks_insert_attrib(local_candidate, "id", tmp);
 		iks_insert_attrib(local_candidate, "ip", ast_sockaddr_stringify_host(&candidate->address));
@@ -1964,16 +1965,16 @@ static int jingle_interpret_ice_udp_transport(struct jingle_session *session, ik
 	for (candidate = iks_child(transport); candidate; candidate = iks_next(candidate)) {
 		char *component = iks_find_attrib(candidate, "component"), *foundation = iks_find_attrib(candidate, "foundation");
 		char *generation = iks_find_attrib(candidate, "generation"), *id = iks_find_attrib(candidate, "id");
-		char *ip = iks_find_attrib(candidate, "ip"), *network = iks_find_attrib(candidate, "network");
-		char *port = iks_find_attrib(candidate, "port"), *priority = iks_find_attrib(candidate, "priority");
-		char *protocol = iks_find_attrib(candidate, "protocol"), *type = iks_find_attrib(candidate, "type");
+		char *ip = iks_find_attrib(candidate, "ip"), *port = iks_find_attrib(candidate, "port");
+		char *priority = iks_find_attrib(candidate, "priority"), *protocol = iks_find_attrib(candidate, "protocol");
+		char *type = iks_find_attrib(candidate, "type");
 		struct ast_rtp_engine_ice_candidate local_candidate = { 0, };
 		int real_port;
 		struct ast_sockaddr remote_address = { { 0, } };
 
 		/* If this candidate is incomplete skip it */
 		if (ast_strlen_zero(component) || ast_strlen_zero(foundation) || ast_strlen_zero(generation) || ast_strlen_zero(id) ||
-		    ast_strlen_zero(ip) || ast_strlen_zero(network) || ast_strlen_zero(port) || ast_strlen_zero(priority) ||
+		    ast_strlen_zero(ip) || ast_strlen_zero(port) || ast_strlen_zero(priority) ||
 		    ast_strlen_zero(protocol) || ast_strlen_zero(type)) {
 			jingle_queue_hangup_with_cause(session, AST_CAUSE_PROTOCOL_ERROR);
 			ast_log(LOG_ERROR, "Incomplete ICE-UDP candidate received on session '%s'\n", session->sid);