[OpenSIPS-Users] UAC's CANCEL into siptrace

[Bogdan-Andrei Iancu]

Hi Jeff,

Jeff Pyle wrote:
> Hi Iñaki,
>
> Don't you ever sleep?
>
> Come to think of it, I've used trace_dialog() on a 1.5 proxy with no problem
> in the siptrace capture.  Maybe this is a new 1.6 problem?
>   
So, in 1.5, the trace_dialog() function was tracing also the inbound 
CANCEL, and in 1.6 (with a similar scrip) it does not?

It is interesting as the trace_dialog() function cannot catch the 
inbound CANCEL as this is part of a different transaction (the function 
is catching only sequential requests based on dialog matching)

In 1.6 there was a fix to extend the dialog context for the CANCEL also, 
but the siptrace module was not correspondingly updated (it must install 
a new TM callback in order to catch the CANCEL for the original INVITE).

Please open a bug report on the tracker and I will take care of this.

Thanks and regards,
Bogdan
> I call trace_dialog() after the initial INVITE.  It wouldn't normally get
> called on anything other than an initial INVITE, including a CANCEL.  It
> would definitely get called before the CANCEL in terms of the transactional
> or dialog terms, however.
>
> My CANCEL processing is very basic, from the default config I believe:
>
>         # CANCEL processing
>         if (is_method("CANCEL")) {
>                 if (t_check_trans())
>                         t_relay();
>                 exit;
>         }
>
>
>
> - Jeff
>
>
>
> On 10/24/09 10:25 PM, "Iñaki Baz Castillo" <ibc at aliax.net> wrote:
>
>   
>> El Domingo, 25 de Octubre de 2009, Jeff Pyle escribió:
>>     
>>> Am I likely handling CANCELs incorrectly in the
>>> loose_route() portion?
>>>       
>> CANCEL is not an in-dialog request. Instead, it's a hop-by-hop request, this
>> is: UAC generates it, the proxy takes it and generates a new one for each
>> current branch (if there is parallel forking).
>>
>> About siptrace, I remember that it doesn't capture some ACK's, but I don't
>> remember issues with CANCEL. Be sure you call trace_dialog() before tha CANCEL
>> handling. 
>>
>>     
>
>
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>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro