[SR-Users] Issue in ACK in WS <-> sip scenario

Ravindrakumar Bhatt ravindra.bhatt at ecosmob.com
Wed Jan 9 14:38:08 CET 2019

I am using latest stable kamailio version 5.2 . I am getting following
error while calling from webrtc client to sip client.
Jan  9 07:25:05 client1 /usr/local/sbin/kamailio[15318]: INFO: <script>:
ACK rsponse: WebRTC --> WebRTC
Jan  9 07:25:05 client1 /usr/local/sbin/kamailio[15318]: WARNING: <core>
[core/msg_translator.c:2812]: via_builder(): TCP/TLS connection (id: 0) for
WebSocket could not be found
Jan  9 07:25:05 client1 /usr/local/sbin/kamailio[15318]: ERROR: <core>
[core/msg_translator.c:2003]: build_req_buf_from_sip_req(): could not
create Via header
Jan  9 07:25:05 client1 /usr/local/sbin/kamailio[15318]: ERROR: <core>
[core/forward.c:549]: forward_request(): building failed
Jan  9 07:25:05 client1 /usr/local/sbin/kamailio[15318]: ERROR: sl
[sl_funcs.c:372]: sl_reply_error(): stateless error reply used: I'm
terribly sorry, server error occurred (1/SL)

Here it is saying that websocket connection is not found but when i check
using netstat connection is in established state.

netstat -anp | grep kamailio
result :
tcp        0      0 XX.XX.XX.XX:3080*               LISTEN
tcp        0      0 XX.XX.XX.XX:3080     0 XX.XX.XX.XX:53632   ESTABLISHED
53632 is same port as port mentioned in received field of location table.
So what can be the issue ? please provide your feedback on same.


*Thanks and Regards,*

*Ravindrakumar Bhatt*
Jr. Software Developer
Ecosmob Technologies Ltd
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