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-rw-r--r--openbsc/src/libmgcp/mgcp_network.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/openbsc/src/libmgcp/mgcp_network.c b/openbsc/src/libmgcp/mgcp_network.c
index 8bd8afba8..40227af01 100644
--- a/openbsc/src/libmgcp/mgcp_network.c
+++ b/openbsc/src/libmgcp/mgcp_network.c
@@ -300,6 +300,15 @@ void mgcp_patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *sta
state->seq_offset, state->packet_duration,
inet_ntoa(addr->sin_addr), ntohs(addr->sin_port),
endp->conn_mode);
+ if (state->packet_duration == 0 && rtp_end->force_constant_timing)
+ LOGP(DMGCP, LOGL_ERROR,
+ "Cannot patch timestamps on 0x%x: "
+ "RTP packet duration is unknown, SSRC: %u, "
+ "from %s:%d in %d\n",
+ ENDPOINT_NUMBER(endp), state->in_stream.ssrc,
+ inet_ntoa(addr->sin_addr), ntohs(addr->sin_port),
+ endp->conn_mode);
+
} else if (state->in_stream.ssrc != ssrc) {
LOGP(DMGCP, LOGL_NOTICE,
"The SSRC changed on 0x%x: %u -> %u "