mgcp: Patch RTP packets again if that is allowed.

openbsc/include/openbsc/mgcp_internal.h

@@ -86,6 +86,9 @@ struct mgcp_endpoint {
 	/* sequence bits */
 	struct mgcp_rtp_state net_state;
 	struct mgcp_rtp_state bts_state;
+
+	/* SSRC/seq/ts patching for loop */
+	int allow_patch;
 };
 
 #define ENDPOINT_NUMBER(endp) abs(endp - endp->cfg->endpoints)

openbsc/src/mgcp/mgcp_network.c

@@ -117,7 +117,7 @@ static void patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *s
 		state->ssrc = rtp_hdr->ssrc;
 		state->seq_offset = (state->seq_no + 1) - seq;
 		state->timestamp_offset = state->last_timestamp - timestamp;
-		//state->patch = 1;
+		state->patch = endp->allow_patch;
 		LOGP(DMGCP, LOGL_NOTICE,
 			"The SSRC changed on 0x%x SSRC: %u offset: %d from %s:%d in %d\n",
 			ENDPOINT_NUMBER(endp), state->ssrc, state->seq_offset,

openbsc/src/mgcp/mgcp_protocol.c

@@ -825,4 +825,5 @@ void mgcp_free_endp(struct mgcp_endpoint *endp)
 	memset(&endp->bts_state, 0, sizeof(endp->bts_state));
 
 	endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE;
+	endp->allow_patch = 0;
 }

openbsc/src/mgcp/mgcp_vty.c

@@ -304,6 +304,7 @@ DEFUN(loop_endp,
 		endp->conn_mode = MGCP_CONN_LOOPBACK;
 	else
 		endp->conn_mode = endp->orig_mode;
+	endp->allow_patch = 1;
 
 	return CMD_SUCCESS;
 }