[FEATURE]Janus websocket fragmentation

[Olatechworld]

Hello Opesisps team,
I am currently using opensipsjs and the new Janus module from opensips to send commands to Janus. All requests seem to be working fine, but the subscribe ptype subscribe request returns the following error:

2025-08-31 23:01:03.092
{ "time": "Aug 31 21:01:03", "level": "ERROR", "pid": 22, "message": "Failed to get janus answer !!! :( ", "function": "w_janus_send_request", "module": "janus" }
2025-08-31 23:01:02.559
{ "time": "Aug 31 21:01:02", "level": "ERROR", "pid": 10, "message": "Failed JANUS process - releasing conn ", "function": "janus_handle_data", "module": "janus" }
2025-08-31 23:01:02.557
{ "time": "Aug 31 21:01:02", "level": "ERROR", "pid": 10, "message": "Failed to read from janus on 80", "function": "handle_io", "module": "janus" }
2025-08-31 23:01:02.557
{ "time": "Aug 31 21:01:02", "level": "ERROR", "pid": 10, "message": "We do not support fragmemntation yet. Dropping...", "function": "janus_ws_parse", "module": "janus" }

Thank you in advance for your help

[razvancrainea]

Can you please post a pcap for this?

[Olatechworld]

pcapopensipsjanus.zip
The opensips docker ip is: 172.20.20.3
The janus docker ip is 172.20.20.6

Please find attached .zip (pcap and some of the logs)

[razvancrainea]

Indeed, Janus is sending a fragmented message in frame 221, which is currently not supported by OpenSIPS. I will convert this ticket to a feature request until we add support for this.

[Olatechworld]

Thank you !

[Olatechworld]

Finally, I found where the fragmentation problem was coming from. In the janus.transport.websockets.jcfg file, when the parameter is json="indent," we have fragmentation, but with json="compact," we don't have fragmentation. That solved my problem.