MT#63317 add strict bundle mode

Change-Id: Ic2076525b9e655cfb7d6fb665898018d29b87d5e

daemon/call_interfaces.c

@@ -858,6 +858,12 @@ static void call_ng_flags_bundle(str *s, unsigned int idx, helper_arg arg) {
 			out->bundle_require = true;
 			out->generate_mid = true;
 			break;
+		case CSH_LOOKUP("strict"):
+			out->bundle_offer = true;
+			out->bundle_require = true;
+			out->bundle_strict = true;
+			out->generate_mid = true;
+			break;
 		default:
 			ilog(LOG_WARN, "Unknown 'BUNDLE' flag encountered: '" STR_FORMAT "'",
 					STR_FMT(s));

daemon/sdp.c

@@ -3496,6 +3496,10 @@ int sdp_create(str *out, struct call_monologue *monologue, sdp_ng_flags *flags)
 				&sdp_address);
 		unsigned int port = sdp_address.port;
 
+		if (media->bundle && MEDIA_ISSET(media, BUNDLE_ONLY) && flags->opmode == OP_OFFER &&
+				flags->bundle_strict && media->bundle != media)
+			port = 0;
+
 		prtp = NULL;
 		if (media->protocol && media->protocol->srtp)
 			prtp = &transport_protocols[media->protocol->rtp_proto];