[SR-Users] Add Reason Header to kamailio generated CANCEL

Wed Nov 18 10:39:36 CET 2020

Hello!

Call flow: FreeSWITCH --> SBC --> Edge Proxy

In my case, the problem is related to the fact that the SBC deletes the
Reason header from FreeSWITCH and I am trying to recover it on the Kamailio
side (Edge Proxy).
It is especially important to recover the message: "Call completed
elsewhere" because this disables the missed call notification on the
destination phone in case of hunt-groups.
The option to forward the call through the stateless loop works well but it
complicates the logic unnecessarily.

So would be great to have a tm function to setup custom Reason, like below:
*...*

*t_cancel_reason("Reason: SIP ;cause=200 ;text=\"Call completed
elsewhere\"\r\n");t_relay();*
*....*

ср, 18 нояб. 2020 г. в 11:16, Daniel-Constantin Mierla <miconda at gmail.com>:

> Same question here like in my other reply:
>
>   *
> https://lists.kamailio.org/pipermail/sr-users/2020-November/111123.html
>
> How do you expect to fill the value of the header?
>
> Cheers,
> Daniel
> On 17.11.20 19:20, David Villasmil wrote:
>
> And on internally generated CANCELs
>
> On Tue, 17 Nov 2020 at 14:20, Denys Pozniak <denys.pozniak at gmail.com>
> wrote:
>
>> Hello!
>>
>> We need to append our own Reason header for the "relayed" CANCEL message,
>> if it is not on the input.
>> Like below:
>>
>>
>> *if ( is_method("CANCEL") && !is_present_hf("Reason") ) { *
>> *  append_hf("Reason: ....);*
>> *  t_relay();*
>> *...*
>>
>>
>>
>>
>> вт, 17 нояб. 2020 г. в 13:00, Daniel-Constantin Mierla <miconda at gmail.com
>> >:
>>
>>> Hello,
>>>
>>> what is exactly the problem? The header is not added if you enable:
>>>
>>>   *
>>> http://kamailio.org/docs/modules/stable/modules/tm.html#local_cancel_reason
>>>
>>> Cheers,
>>> Daniel
>>> On 16.11.20 20:43, Denys Pozniak wrote:
>>>
>>> Hello guys,
>>>
>>> We have faced almost the same problem adding *Reason:
>>> SIP;cause=200;text="Call completed elsewhere"* to the t_relayed CANCEL
>>> request.
>>> Is there an elegant solution to add this header?
>>>
>>> PS. Switching to the stateless mode does not look pretty for us...
>>>
>>>
>>> сб, 1 февр. 2020 г. в 06:04, Alfonso Pinto <alfonso.pinto at gmail.com>:
>>>
>>>> Hi guys,
>>>>
>>>> Thanks for your answers.
>>>> I did try local_cancel_reason and it’s not doing anything for the
>>>> CANCELs generated by kamailio. Isn’t that parameter intended for the
>>>> CANCELs received and then relayed?
>>>>
>>>> As Alex and David mentioned, what I need is to add my own reason
>>>> header. There are some cases that requires to set the Reason header to
>>>> something specific. IE: terminal supported call waiting in IMS.
>>>>
>>>> Thanks for the piece of code, I will check what can be done here.
>>>>
>>>> Regards,
>>>> Alfonso
>>>>
>>>> El El vie, 31 ene 2020 a las 22:10, Henning Westerholt <hw at skalatan.de>
>>>> escribió:
>>>>
>>>>> Hi Alex,
>>>>>
>>>>> ok, I was reading that he wants to get just one reason header, not one
>>>>> dynamic generated.
>>>>>
>>>>> Just looked briefly, this seems to be the code:
>>>>>
>>>>> t_msgbuilder.c
>>>>> /* Build a local request based on a previous request; main
>>>>>  * customers of this function are local ACK and local CANCEL
>>>>>  */
>>>>> char *build_local(struct cell *Trans,unsigned int branch,
>>>>>         unsigned int *len, char *method, int method_len, str *to
>>>>>         , struct cancel_reason* reason
>>>>>         )
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Henning
>>>>>
>>>>> --
>>>>> Henning Westerholt – https://skalatan.de/blog/
>>>>> Kamailio services – https://gilawa.com
>>>>>
>>>>> -----Original Message-----
>>>>> From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of
>>>>> Alex Balashov
>>>>> Sent: Friday, January 31, 2020 9:45 PM
>>>>> To: sr-users at lists.kamailio.org
>>>>> Subject: Re: [SR-Users] Add Reason Header to kamailio generated CANCEL
>>>>>
>>>>> I understood Alfonso's question to implicitly be: how can I add a
>>>>> dynamic and variable Reason header to outgoing CANCELs?
>>>>>
>>>>> Perhaps I was mistaken. But if I'm not, as far as I know there is no
>>>>> means of doing that. Right?
>>>>>
>>>>> On Fri, Jan 31, 2020 at 08:37:48PM +0000, Henning Westerholt wrote:
>>>>>
>>>>> > Hello,
>>>>> >
>>>>> > have you tried to use this parameter:
>>>>> >
>>>>> >
>>>>> http://kamailio.org/docs/modules/stable/modules/tm.html#local_cancel_r
>>>>> > eason
>>>>> >
>>>>> > Cheers,
>>>>> >
>>>>> > Henning
>>>>> >
>>>>> > --
>>>>> > Henning Westerholt – https://skalatan.de/blog/ Kamailio services –
>>>>> > https://gilawa.com<https://gilawa.com/>
>>>>> >
>>>>> > From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of
>>>>> > Alfonso Pinto
>>>>> > Sent: Wednesday, January 29, 2020 8:04 PM
>>>>> > To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org
>>>>> >
>>>>> > Subject: [SR-Users] Add Reason Header to kamailio generated CANCEL
>>>>> >
>>>>> > Hi everyone,
>>>>> >
>>>>> > I've got a specific case: when the inv_fr times out, I need to add a
>>>>> Reason header to the CANCEL generated by kamailio. I've tried to see if I
>>>>> could do it in the onsend_route, but that one is not triggered for the
>>>>> generated CANCEL. I also checked event_route[tm:local-request], but that
>>>>> one isn't triggered either for the generated CANCEL.
>>>>> >
>>>>> > Is there any way to do it? Or maybe to have any pointer about where
>>>>> to look in the code so I may try to trigger event_route[tm:local-request]
>>>>> for these generated CANCELs?
>>>>> >
>>>>> > Regards,
>>>>> > Alfonso
>>>>>
>>>>> > _______________________________________________
>>>>> > Kamailio (SER) - Users Mailing List
>>>>> > sr-users at lists.kamailio.org
>>>>> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>
>>>>>
>>>>> --
>>>>> Alex Balashov | Principal | Evariste Systems LLC
>>>>>
>>>>> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
>>>>> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>>>>>
>>>>> _______________________________________________
>>>>> Kamailio (SER) - Users Mailing List
>>>>> sr-users at lists.kamailio.org
>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>
>>>> _______________________________________________
>>>> Kamailio (SER) - Users Mailing List
>>>> sr-users at lists.kamailio.org
>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>>
>>>
>>> --
>>>
>>> BR,
>>> Denys Pozniak
>>>
>>>
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>> --
>>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>>> Funding: https://www.paypal.me/dcmierla
>>>
>>>
>>
>> --
>>
>> BR,
>> Denys Pozniak
>>
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
> --
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com
> phone: +34669448337
>
> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Funding: https://www.paypal.me/dcmierla
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>

-- 

BR,
Denys Pozniak
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