[SR-Users] Access to CANCEL messages sent during parallel forking

[Yuriy Gorlichenko]

You can try event_route[tm:local-request] for this.

On Tue, 25 Feb 2020, 15:36 Marco Capetta, <mcapetta at sipwise.com> wrote:

> Hi All,
>
> I have a question regarding call forking and how to access failed
> branches: the ones for which kamailio sends out the CANCEL because on
> another one a 200OK was received.
> This is the scenario:
>   - A calls B
>   - 3 devices are registered on B, so a parallel forking is done to B1,
> B2 and B3
>   - B1, B2, and B3 all reply with 180 Ringing
>   - B1 replies with 200OK
>   - Kamailio CANCELs the branches with B2 and B3
>
> What I need is access to each single CANCEL that Kamailio sends out to
> B2 and B3.
> In particular I need to know the branch-id and Via branch of all the
> cancelled branches. Additionally it would be perfect to have them inside
> the TM module, in order to have access also to internal AVPs.
>
> I tried with dedicated failure routes and also with per-branch failure
> routes, but I was never able to access to those values.
> I also didn't found a specific event-route that can help me solve this
> problem.
>
> Does anyone have an idea?
>
> Kamailio version 5.2.5
>
>
> Thanks
>
> Regards
> Marco
>
>
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