Indeed, the sipdump is not saving everything that comes in or goes out of kamailio, only the traffic that uses the functions for handling or sending sip traffic. http is mapped over sip internally, but ws pings are using directly lower api for tcp send.

Cheers,
Daniel

On 11.03.22 10:34, Igor Olhovskiy wrote:

Xuo,

Can't say for Chrome Web Tools, but they most likely will filter these packets out as they are not part of "real traffic". I'd suggest you to do a capture directly on the wire with Wireshark or so.

Same for Kamailio, I also don't expect em to be saved there for the same reason above.

пт, 11 мар. 2022 г. в 09:29, Xuo Guoto <xuoguoto@protonmail.com>:

Hi,

Yes, I understand that the SIP OPTIONS and websocket pings are different.

I check the ping using two methods. One at the client side using chrome developer tools. At the server side I use sipdump module to capture all traffic.

modparam("sipdump", "enable", 1)

modparam("sipdump", "folder", "/var/log/kamailio/sip/")

With this enabled, kamailio dumps all the traffic in a file for analysis. For example:

tag: rcv

pid: 1553531

process: 16

time: 1646982958.357033

date: Fri Mar 11 12:45:58 2022

proto: tls ipv4

srcip: x9.xx.196.11

srcport: 54640

dstip: 1x8.xx.59.172

dstport: 443

~~~~~~~~~~~~~~~~~~~~

GET /ws HTTP/1.1

Host: myhost-q01.mydomain.net

Connection: Upgrade

Pragma: no-cache

Cache-Control: no-cache

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.3

6 Edg/99.0.1150.36

Upgrade: websocket

Origin: https://myhost-adm.mydomain.net

Sec-WebSocket-Version: 13

<snip>

I expect the ping websockets to be printed here, but this is not the only place I am checking for. If pings are being sent, I should get to see it at chrome websocket also. In my case neither place shows any trace of websocket pings packets.

X.

Sent with ProtonMail secure email.

------- Original Message -------
On Friday, March 11th, 2022 at 2:19 PM, Igor Olhovskiy <igorolhovskiy@gmail.com> wrote:

Xuo,

How do you capture this traffic? WebSocket pings is not an ordinary "SIP-style OPTIONS" pings, It's packets described in RFC6455 - https://datatracker.ietf.org/doc/html/rfc6455#section-5.5.2

чт, 10 мар. 2022 г. в 16:57, Xuo Guoto <xuoguoto@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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Igor

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Igor

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