TT#99621 allow RTCP handlers to discard the packet

Change-Id: Ia48a0fa375afc46d9d2ef639ab55538b4b8a5e51

daemon/media_socket.c

@@ -1764,16 +1764,19 @@ static int do_rtcp(struct packet_handler_ctx *phc) {
 	int ret = -1;
 
 	GQueue rtcp_list = G_QUEUE_INIT;
-	if (rtcp_parse(&rtcp_list, &phc->mp))
+	int rtcp_ret = rtcp_parse(&rtcp_list, &phc->mp);
+	if (rtcp_ret < 0)
 		goto out;
+	if (rtcp_ret == 1)
+		goto ok;
 	if (phc->rtcp_filter)
 		if (phc->rtcp_filter(&phc->mp, &rtcp_list))
 			goto out;
 
 	// queue for output
 	codec_add_raw_packet(&phc->mp);
+ok:
 	ret = 0;
-
 out:
 	rtcp_list_free(&rtcp_list);
 	return ret;

daemon/rtcp.c

@@ -247,6 +247,9 @@ struct rtcp_process_ctx {
 	// Homer stats
 	GString *json;
 	int json_init_len;
+
+	// verdict
+	int discard:1;
 };
 // all available methods
 struct rtcp_handler {
@@ -646,6 +649,7 @@ void rtcp_list_free(GQueue *q) {
 
 
 
+// returns: 0 = ok, forward, -1 = error, drop, 1 = ok, but discard (no forward)
 int rtcp_parse(GQueue *q, struct media_packet *mp) {
 	struct rtcp_header *hdr;
 	struct rtcp_chain_element *el;
@@ -714,7 +718,7 @@ next:
 	CAH(finish, c, &mp->fsin, &mp->sfd->socket.local, &mp->tv);
 	CAH(destroy);
 
-	return 0;
+	return log_ctx->discard ? 1 : 0;
 
 error:
 	CAH(finish, c, &mp->fsin, &mp->sfd->socket.local, &mp->tv);