MT#55283 avoid erroneous endpoint learning

Perform endpoint address check before doing ingress SSRC handling. We
don't want to act on an apparent SSRC change if the endpoint address
doesn't match and the packet should have been ignored.

Closes #1655

Change-Id: I251e23b1583b1916c7c4904cf40d3b37b3533117

daemon/media_socket.c

@@ -2741,12 +2741,15 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 	}
 #endif
 
-	if (rtpe_config.active_switchover && IS_FOREIGN_CALL(phc->mp.call))
-		call_make_own_foreign(phc->mp.call, false);
-
 	// this sets rtcp, in_srtp, and sinks
 	media_packet_rtcp_demux(phc);
 
+	if (media_packet_address_check(phc))
+		goto drop;
+
+	if (rtpe_config.active_switchover && IS_FOREIGN_CALL(phc->mp.call))
+		call_make_own_foreign(phc->mp.call, false);
+
 	bool is_blackhole = MEDIA_ISSET(phc->mp.media, BLACKHOLE);
 	if (!is_blackhole)
 		is_blackhole = !phc->rtcp && !MEDIA_ISSET(phc->mp.media, RECV);
@@ -2819,9 +2822,6 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 	if (!PS_ISSET(phc->mp.stream, KERNELIZED) || rtpe_now.tv_sec > phc->mp.stream->kernel_time + 1)
 		count_stream_stats_userspace(phc->mp.stream);
 
-	if (media_packet_address_check(phc))
-		goto drop;
-
 	///////////////// EGRESS HANDLING
 
 	str orig_raw = STR_NULL;