Hello everyone,
I'm currently trying to make WebRTC-to-SIP calls. My setup is: WebRTC → WSS →
Kamailio → UDP → Asterisk, using rtpengine. I have a route named GET_ICE that
is called in onreply_route.
Everything else works: SIP-to-SIP calls and WebRTC messaging are fine. Only
WebRTC-to-SIP calls have audio issues. I've tested many different ICE flags,
but without success. In my testing I think I've managed to get audio to
kamailio but not to webrtc, but decided to rollback to start to get help.
In my PJSIP configuration, I allow these codecs:
allow=g722,ulaw,vp9,vp8,h264
My Kamailio code:
route[GET_ICE] {
if ( $proto == "wss" ) {
if (is_ip_rfc1918("$si")) {
$dlg_var(ice) = " ";
} else {
$dlg_var(ice) = " ICE=remove RTP ";
}
} else {
$dlg_var(ice) = "ICE=FORCE";
}
}
route[BUILD_RTPENGINE_PARAMETER] {
route(SET_RTP_DIRECTION); # returns $dlg_var(rtp_direction)
if ( is_method("INVITE") ) {
route(GET_ICE); # returns $dlg_var(ice)
}
xlog("L_WARN", "[BUILD_RTPENGINE_PARAMETER] > $dlg_var(rtp_direction)\n");
$var(rtp_param) = "replace-origin replace-session-connection " +
$dlg_var(ice) + " " + $dlg_var(rtp_direction);
xlog("L_WARN", "[RTPENGINE]: Method $rm status $rs protocol:
$dlg_var(call_type) -> $dlg_var(rtp_direction) -> [$dlg_var(ice)]\n");
xlog("L_WARN", "[RTPENGINE]: Param: [$var(rtp_param)]\n");
rtpengine_manage($var(rtp_param));
}
My logs:
3(47) WARNING: <script>: [REPLY] 1xx or 2xx received
3(47) WARNING: <script>: [SET_RTP_DIRECTION] -> reply from internal =
direction=internal direction=external
3(47) WARNING: <script>: [BUILD_RTPENGINE_PARAMETER] > direction=internal
direction=external
3(47) WARNING: <script>: [RTPENGINE]: Method INVITE status 200 protocol:
<null> -> direction=internal direction=external -> []
3(47) WARNING: <script>: [RTPENGINE]: Param: [replace-origin
replace-session-connection direction=internal direction=external]
[1758217893.108564] INFO: [ID="m7e648isjm9n96ti62k9"]: [control] Received
command 'answer' from 10.5.0.8:42938
[1758217893.108583] INFO: [ID="m7e648isjm9n96ti62k9"]: [core]
replace-session-connection flag encountered, but not supported anymore.
[1758217893.108998] WARNING: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1"]: [core] ICE restart
detected, but reset not allowed at this point
[1758217893.109379] INFO: [ID="m7e648isjm9n96ti62k9"]: [control] Replying to
'answer' from 10.5.0.8:42938 (elapsed time 0.000804 sec)
[1758217893.109411] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice] ICE
negotiated: peer for component 1 is 10.5.0.2:28384
[1758217893.109418] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice] ICE
negotiated: local interface 10.5.0.8
[1758217893.208990] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice] ICE
negotiated: peer for component 1 is 10.5.0.2:28384
[1758217893.209036] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice] ICE
negotiated: local interface 10.5.0.8
[1758217894.111112] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [crypto]
DTLS: Peer certificate accepted
[1758217894.112292] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [crypto]
DTLS-SRTP successfully negotiated using AES_CM_128_HMAC_SHA1_80
[1758217894.112341] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [crypto]
DTLS-SRTP successfully negotiated using AES_CM_128_HMAC_SHA1_80
[1758217896.299109] INFO: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [core]
Confirmed peer address as 10.5.0.2:28384
[1758217896.299174] ERR: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [srtp] SRTP
output wanted, but no crypto suite was negotiated
[1758217901.298677] ERR: [ID="m7e648isjm9n96ti62k9"
tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [rtcp]
SRTCP output wanted, but no crypto suite was negotiated
[1758217930.743494] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
Closing call due to timeout
[1758217930.743636] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core] Final
packet stats:
[1758217930.743651] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core] ---
Tag '2bad2cacef0945b1a506a198aeb4ae01', created 1:00 ago for branch ''
[1758217930.743659] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
------ Media #1 (audio over RTP/AVP) using unknown codec
[1758217930.743670] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
--------- Port 10.5.0.8:15028 <> 172.31.208.1:4000 , SSRC 0, in 0 p,
0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
[1758217930.743677] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
--------- Port 10.5.0.8:15029 <> 172.31.208.1:4001 (RTCP), SSRC 0,
in 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
[1758217930.743683] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core] ---
Tag '88cf8c49-cdfc-475e-8075-a3ce0a36ecca', created 1:00 ago for branch ''
[1758217930.743687] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
------ Media #1 (audio over RTP/AVP) using unknown codec
[1758217930.743693] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
--------- Port 10.5.0.8:17956 <> 10.5.0.2:64570, SSRC 0, in 0 p,
0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
[1758217930.743699] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
--------- Port 10.5.0.8:17957 <> 10.5.0.2:64571 (RTCP), SSRC 0,
in 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
Thank you.
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