[OpenSIPS-Users] Intercept 477 on TCP closed

[Johan De Clercq]

use t_relay wih 0x2 option.

On Mon, Aug 17, 2020, 15:16 Callum Guy <callum.guy at x-on.co.uk> wrote:

> Hi All,
>
> Using OpenSIPs 3.0.3
>
> I'm dealing with a client device with a faulty network, they are using a
> softphone WebRTC client and the TCP connections disappear sporadically.
>
> When the media server issues a RE-INVITE session timer OpenSIPs discovers
> the closed TCP connection and returns 477 to the media server. In this case
> the media server is FreeSWITCH which promptly ignores the
> non-standard session timer response and the call hangs. I want to close the
> call immediately in this situation as there is no way I can see to
> reestablish the connection. The call is typically bridged on the media
> server so the other call leg is left dangling indefinitely so I need to
> find a way to kill the session.
>
> Reading RFC4028 <https://tools.ietf.org/html/rfc4028#section-10> the only
> response codes that should trigger a BYE are 408/481 so my aim is to
> intercept the 477 and alter it. Unfortunately I have been unable to
> intercept it within my OpenSIPs config as the messages don't hit
> failure_route or similar. Am I missing a trick? Is there somewhere where
> these can be intercepted or should I be looking into a solution on the
> media server instead?
>
> Many thanks,
>
> Callum
>
>
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