Hello,

so, you are saying that the connection handling behaviour of Kamailio with 
rtpengine changes, if you are using database mode compared to not using the 
database?

I’ve might missed some side-effects, but I think that using rtpengine_manage() 
should not affect the handling of Websocket connection (or in fact any other 
connection) operation that Kamailio is doing on the SIP level.
The rtpengine_manage() should affect the SDP content of the SIP message body 
only.

Can you reproduce this behaviour?

Cheers,

Henning

--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>


From: Knserbrave via sr-users <[email protected]>
Sent: Friday, December 6, 2024 7:11 PM
To: Kamailio (SER) - Users Mailing List <[email protected]>
Cc: Knserbrave <[email protected]>
Subject: [SR-Users] WS and rtpengine_manage

Hi Kamailio Community,

When testing rtpengine_manage and websockets, I noticed that if the rtpengine 
table in the database is not used, a new websocket is created for every call 
for a given dialog.  That is, when an INVITE is received, an offer is sent to 
rtpengine. When the 200 OK or 18[3|0] is received, an answer is sent. However, 
the WS identifier often changes and as a result the request is not sent over 
the same websocket.  This is problematic particularly when using FQDNs in the 
Kamailio configuration.

When a load balancer is used between Kamailio and rtpengine, the answer may 
arrive at a different rtpengine in the cluster.

After tracing through the source, I could not find a configuration parameter or 
set of triggers that I could manipulate to fix this. It leads me to believe it 
is only possible to reuse the websocket when the rtpengine table is used.

Does anybody have more experience than I in this area that may be able to point 
me in the right direction, making load balancers for rtpengine_manage calls 
possible?
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