[SR-Users] WebSocket ping is not being sent

Igor Olhovskiy igorolhovskiy at gmail.com
Fri Mar 11 09:49:16 CET 2022


How do you capture this traffic? WebSocket pings is not an ordinary
"SIP-style OPTIONS" pings, It's packets described in RFC6455 -

чт, 10 мар. 2022 г. в 16:57, Xuo Guoto <xuoguoto at protonmail.com>:

> Hello list,
> I have kamailio 5.5.3 (x86_64/linux) configured as an SBC in front of
> asterisk to front end webrtc clients. Browser clients running JsSIP 3.7.0
> connect to kamailio via webrtc and kamailio sends the traffic back to
> asterisk using SIP. rtpengine is configured to relay the RTP packets.
> I need to send websocket pings every 10 seconds to the browser clients.
> I have the following config in kamailio:
> modparam("websocket", "keepalive_mechanism", 1)
> modparam("websocket", "keepalive_timeout", 10)
> modparam("websocket", "keepalive_interval", 2)
> modparam("websocket", "keepalive_processes", 2)
> modparam("websocket", "verbose_list", 1)
> If my understanding of the documentation is correct, I do not need to do
> any additional configuration.
> But looking at the websocket traffic, I do not see any ping packets in
> websocket. I am also using sipdump module to capture all packets sent and
> received by kamailio and the ping packets are not visible there either.
> What could be wrong here? Do I need to do any additional config?
> Thanks for every help!
> X.
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Best regards,
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