[OpenSIPS-Users] call_token_avp call control

[samuel]

thanks a lot, Saúl.


On 12 July 2013 18:10, Saúl Ibarra Corretgé <saul at ag-projects.com> wrote:

>
> On Jul 12, 2013, at 10:14 AM, samuel wrote:
>
> > Hi folks,
> >
> > We were recently playing around with call control application and came
> across the parameter call_token_avp. There's an explanation in the README
> file and the code does exactly what is written: select whether 2 INVITEs
> with same Call-ID belongs to the same call.
> > In the code, it seems as the call is being rated again (it's removed
> from user_calls structure and the setup is being called again).
> >
> > Could anyone confirm whether above assumption is right?
> >
>
> If 2 calls arrive at callcontrol with different tokens, the second one
> will be rejected, that is, call_control() will return a negative code. In
> our configurations we reply with 400 Duplicated CallID in that case.
>
> > Besides, what is the use case behind this parameter? In which case is it
> necessary to use the token to indicate that the second INVITE belongs to
> the same call? Migh it be controlling retransmissions of the same INVITE?
> >
>
> We ran into some problems with devices which reused the call-id, or sent a
> very late re-INVITE and this creates accounting issues.
>
>
> Regards,
>
> --
> Saúl Ibarra Corretgé
> AG Projects
>
>
>
>
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