mgcp: Remember the initial sequence number of the stream
This information is required for calculating the packet loss at the
end of a phone call.
diff --git a/openbsc/include/openbsc/mgcp_internal.h b/openbsc/include/openbsc/mgcp_internal.h
index db24701..d7e51a0 100644
--- a/openbsc/include/openbsc/mgcp_internal.h
+++ b/openbsc/include/openbsc/mgcp_internal.h
@@ -46,6 +46,7 @@
uint32_t orig_ssrc;
uint32_t ssrc;
+ int first_seq_no;
uint16_t seq_no;
int seq_offset;
uint32_t last_timestamp;
diff --git a/openbsc/src/libmgcp/mgcp_network.c b/openbsc/src/libmgcp/mgcp_network.c
index 2142264..408fea4 100644
--- a/openbsc/src/libmgcp/mgcp_network.c
+++ b/openbsc/src/libmgcp/mgcp_network.c
@@ -120,6 +120,7 @@
timestamp = ntohl(rtp_hdr->timestamp);
if (!state->initialized) {
+ state->first_seq_no = seq;
state->seq_no = seq - 1;
state->ssrc = state->orig_ssrc = rtp_hdr->ssrc;
state->initialized = 1;