WebRTC closing call due to timeout however rtp was flowing

[vijay kumar]

Hi Al,

I am implementing PBX to  WebRTC(wss/srtp), RTP(udp/rtp) and SRTP(tls/srtp)

Media is flow from party A to party B in all three scenarios, however in WebRTC scenario media is flowing intially but in rtpengine after timeout period rtpengine cleanup the call with error message Closing call due to timeout.

for Offer to  WebRTC from PBX

RTP/SAVP replace-origin replace-session-connection SRTP ICE=force SDES-off DTLS=passive rtcp-mux-require

for Answer from webRTC to PBX

RTP/AVP replace-origin replace-session-connection RTP ICE=remove SDES-off DTLS=off rtcp-mux-demux 

RTPEngine Logs

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: Final packet stats:

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --- Tag 'as5459bf75', created 0:25 ago for branch '', in dialogue

 with 'c6h17u854e'

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: ------ Media #1 (audio over RTP/AVP) using PCMA/8000

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --------- Port       x.x.x.x:10346 <>   x.x.x.x:19130, SS

RC 412566f4, 925 p, 159100 b, 0 e, 2 ts

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --------- Port       x.x.x.x:10347 <>   x.x.x.x:19131 (RT

CP), SSRC 412566f4, 4 p, 256 b, 0 e, 1 ts

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --- Tag 'c6h17u854e', created 0:25 ago for branch '', in dialogue

 with 'as5459bf75'

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: ------ Media #1 (audio over UDP/TLS/RTP/SAVPF) using PCMA/8000

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --------- Port       x.x.x.x:10336 <>   x.x.x.x:7481 , SS

RC ac21ff8, 1006 p, 180130 b, 0 e, 0 ts

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --- SSRC ac21ff8

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: ------ Average MOS 4.3, lowest MOS 4.3 (at 0:10), highest MOS 4.3

 (at 0:10)

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: --- SSRC 412566f4

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: INFO: [48015deb01ce041f...@x.x.x.x]: ------ Average MOS 4.3, lowest MOS 4.3 (at 0:14), highest MOS 4.3

 (at 0:14)

Nov 22 02:30:17 media-engine-1 rtpengine[2509]: DEBUG: [48015deb01ce041f...@x.x.x.x]: freeing send_timer

Thank you.

Regards,

Vijay

[Richard Fuchs]

Just you post a more complete log? Just the "final packet stats" doesn't say very much.

Cheers

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[vijay kumar]

Hi Richard,

Attaching the rtpengine.log attachment for this call-id.

also, webrtc is behind the NAT.

To view this discussion on the web visit https://groups.google.com/d/msgid/rtpengine/8cce8b83-599f-ff4c-1b5d-dfe2ed2ae812%40sipwise.com.

[Richard Fuchs]

On 21/11/2022 16.47, [EXT] vijay kumar wrote:
> Hi Richard,
> Attaching the rtpengine.log attachment for this call-id.
> also, webrtc is behind the NAT.

What version is this, and what is the config?

Can you confirm that packet counters in /proc/rtpengine/0/list are
increasing while a call is running?

Cheers

[vijay kumar]

This issue was due to a custom patch, as per the patch event when no RTCP then RTPTimeout was implemented. As webrtc use rtcp-mux hence it does not explicitly send RTCP on a different port.

After removing that custom patch it's working fine.

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