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

[Marco Capetta]

Hi,

CANCEL message doesn't show up in "onsend_route".
I'm only able to the the 200OK reply received from the device in 
"reply_route", I can probably get the via-branch from there, but I don't 
have access to the AVPs...

Having a dedicate event route, or reuse an existing one, would be the 
best option.

Thanks
Marco


On 2/26/20 10:28 AM, Daniel-Constantin Mierla wrote:
>
> Hello,
>
> the last option to try is onsend_route and if the CANCEL shows up 
> there, then use some string operations over $snd(buf) to get the Via 
> branch, last value after "." being the branch index. I am not sure you 
> can get the INVITE avps there, but you can try.
>
> Otherwise a new event route has to be added for this purpose. Probably 
> not much coding, depends of what is wanted to be exposed there, as the 
> cancel is generated locally, there is no incoming sip_msg_t structure.
>
> Cheers,
> Daniel
>
> On 26.02.20 10:12, Marco Capetta wrote:
>> Hi Yuriy,
>>
>> thanks for the suggestion.
>> I tried both "event_route[tm:local-request]" and 
>> "event_route[tm:local-response]" but internally generated CANCEL 
>> messages are not captured by those event routes.
>> On the contrary, I can see that OPTIONS, NOTIFY and also PUBLISH 
>> messages are there.
>>
>> Do you have any other suggestion?
>>
>> Thanks
>> Regards
>> Marco
>>
>> On 2/25/20 5:50 PM, Yuriy Gorlichenko wrote:
>>> You can try event_route[tm:local-request] for this.
>>>
>>> On Tue, 25 Feb 2020, 15:36 Marco Capetta, <mcapetta at sipwise.com 
>>> <mailto: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
>>>
>>>
>>>     _______________________________________________
>>>     Kamailio (SER) - Users Mailing List
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>>>
>>>
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>>
>> -- 
>> *Marco Capetta *
>> VoIP Developer
>>
>> Sipwise GmbH <http://www.sipwise.com> , Campus 21/Europaring F15
>> AT-2345 Brunn am Gebirge
>>
>> Phone: +43(0)1 301 2044 <tel:+4313012044>
>> Email: mcapetta at sipwise.com <mailto:mcapetta at sipwise.com>
>> Website: www.sipwise.com <http://www.sipwise.com>
>>
>> Particulars according Austrian Companies Code paragraph 14
>> "Sipwise GmbH" - Europaring F15 - 2345 Brunn am Gebirge
>> FN:305595f, Commercial Court Vienna, ATU64002206
>>
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> -- 
> Daniel-Constantin Mierla --www.asipto.com
> www.twitter.com/miconda  --www.linkedin.com/in/miconda
> Kamailio Advanced Training - March 9-11, 2020, Berlin -www.asipto.com
> Kamailio World Conference - April 27-29, 2020, in Berlin --www.kamailioworld.com

-- 
*Marco Capetta *
VoIP Developer

Sipwise GmbH <http://www.sipwise.com> , Campus 21/Europaring F15
AT-2345 Brunn am Gebirge

Phone: +43(0)1 301 2044 <tel:+4313012044>
Email: mcapetta at sipwise.com <mailto:mcapetta at sipwise.com>
Website: www.sipwise.com <http://www.sipwise.com>

Particulars according Austrian Companies Code paragraph 14
"Sipwise GmbH" - Europaring F15 - 2345 Brunn am Gebirge
FN:305595f, Commercial Court Vienna, ATU64002206

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