[sr-dev] [kamailio/kamailio] Kamailio with rtpengine between kamailio 4.4.1 and 4.4.2 (#855)

[Laurent Glayal]

Hi,
- using latest rtpengine master from github .
- using kamailio configuration with rtpengine to process incoming WebRTC calls and forward as SIP/RTP calls, using rtpengine to process SRTP one side and RTP on the other side
- using the same kamailio configuration file between kamailio revisions
- using kamailio 4.4.0 or kamailio 4.4.1 everything works fine, but starting with kamailio 4.4.2 and newer this one does not send the same commands to rtpengine, there is no difference/error in kamailio log files

Starting with kamailio 4.4.2 the following elements are seen on socket between kamailio and rtpengine 

>  tcpdump -i any -n -p -s0 -A  port 2223
> ...
> 14:46:48.050895 IP 127.0.0.1.47294 > 127.0.0.1.rockwell-csp2: UDP, length 194
> E...p,.. at ...................2_12168_1 d3:ICE6:remove18:transport-protocol7:RTP/AVP7:call-id36:68c3bb30-> > e7a8-11ab-3f61-04969aef87e413:received-froml3:IP415:192.168.160.127e8:from-tag20:AKlSUpLNnHZUFwLTPDxz7:command6:deletee
> 14:46:48.051038 IP 127.0.0.1.rockwell-csp2 > 127.0.0.1.47294: UDP, length 74
E..f.. at .@.<..............R.e2_12168_1 d7:warning38:Call-ID not found or tags didn't match6:result2:oke
> 14:46:48.064394 IP 127.0.0.1.36712 > 127.0.0.1.rockwell-csp2: UDP, length 194
E...p:.. at ............h......2_12154_1 d3:ICE6:remove18:transport-protocol7:RTP/AVP7:call-id36:68c3bb30-e7a8-11ab-3f61-04969aef87e413:received-froml3:IP415:192.168.160.127e8:from-tag20:AKlSUpLNnHZUFwLTPDxz7:command6:deletee
> 14:46:48.064804 IP 127.0.0.1.rockwell-csp2 > 127.0.0.1.36712: UDP, length 74
E..f.. at .@.<............h.R.e2_12154_1 d7:warning38:Call-ID not found or tags didn't match6:result2:oke
> ...
> 

With older kamailio 4.4.1 or 4.4.0 the kamailio sent commands including received SDP 


> 15:03:49.229974 IP 127.0.0.1.60102 > 127.0.0.1.rockwell-csp2: UDP, length 1938
E...r... at .. ................13292_3 d3:sdp1639:v=0
o=- 6640213216577907000 2 IN IP4 127.0.0.1
s=Doubango Telecom - chrome
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS 9yLYCKgUvouNO6bYmskX60S0VD3SCy7KRuf6
m=audio 52254 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 126
c=IN IP4 192.168.160.127
a=rtcp:52255 IN IP4 192.168.160.127
a=candidate:143086084 1 udp 2122260223 192.168.160.127 52254 typ host generation 0 network-id 1
a=candidate:143086084 2 udp 2122260222 192.168.160.127 52255 typ host generation 0 network-id 1
a=candidate:1174712052 1 tcp 1518280447 192.168.160.127 9 typ host tcptype active generation 0 network-id 1
a=candidate:1174712052 2 tcp 1518280446 192.168.160.127 9 typ host tcptype active generation 0 network-id 1
...

Starting with kamailio 4.4.2 is there any recommended rtpengine revision to use or new configuration parameters to set ? 

Thanks.
Regards.

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