[SR-Users] Time elapsed since previous message.

[David Villasmil]

Actually I already implemented that timeout, I haven’t asked about that,
because I didn’t have any problems with that one.

I am being asked for that “if a 180 comes within 0.8 seconds, cancel the
call and send a 480 to the origination.

The cancel I got it working thanks to your help. Sending back a 480 to the
origination is what’s proving more difficult, I just can’t figure that one
out.

On Wed, 10 Feb 2021 at 19:29, Alex Balashov <abalashov at evaristesys.com>
wrote:

> Wouldn’t it make more sense to just have an aggressive timeout for the
> “keeping it there” aspect?
>
> That is, if, upon receipt of a non-100 1xx message, a final dispositive
> reply does not follow within X seconds, route-advance to the next provider?
> This can be accomplished with the t_set_fr/t_reset_fr() technique
> previously discussed.
>
> It sounds like you might be making this unnecessarily complicated. :-)
> Don’t worry about how quickly they send you the progress/alerting messages;
> instead, worry about how slowly they send you anything else afterward.
>
> The only wrinkle I can see that in that is the caller experience...
>
> —
> Sent from mobile, with due apologies for brevity and errors.
>
> On Feb 10, 2021, at 2:13 PM, David Villasmil <
> david.villasmil.work at gmail.com> wrote:
>
> 
>
> Some providers have other providers which many times just answer the call
> and try to keep it there. It’s a known strategy some scammers use. Getting
> a 180/3 in say; 500ms (to a real-life hard line, is probably one such call.
>
>
> On Wed, 10 Feb 2021 at 18:52, Raúl Alexis Betancor Santana <
> rbetancor at serlink.es> wrote:
>
>> What is the point of refusing a call that answer with a 100/183 "too
>> quickly" ? ... I don't get the point on that.
>>
>> Saludos
>> --
>> *Raúl Alexis Betancor Santana*
>> Serlink Telecom S.R.L.U.
>>
>> ------------------------------
>> *De: *"David Villasmil" <david.villasmil.work at gmail.com>
>> *Para: *"Kamailio (SER) - Users Mailing List" <
>> sr-users at lists.kamailio.org>
>> *Enviados: *Miércoles, 10 de Febrero 2021 9:57:35
>> *Asunto: *Re: [SR-Users] Time elapsed since previous message.
>>
>> Hello Alex,
>> Again thanks.
>>
>> I'm using that calculation to, when receiving a 180/3, if it comes in too
>> quickly (i.e. 100ms) i cancel that call, and send a 480 the the A leg.
>> I haven't found way of doing this, is this possible at all? I trired
>> setting a very low t_set_fr(10,10) (0 means set the default), but that's
>> not working...
>>
>> Is there a way of doing this?
>>
>> Thanks!
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> phone: +34669448337
>>
>>
>> On Tue, Feb 9, 2021 at 3:31 PM David Villasmil <
>> david.villasmil.work at gmail.com> wrote:
>>
>>> Thanks Alex,
>>>
>>> Exactly what I was thinking. Just wondering whether there was a better
>>> way.
>>>
>>> Again THANKS!
>>>
>>> David
>>>
>>> On Tue, 9 Feb 2021 at 14:56, Alex Balashov <abalashov at evaristesys.com>
>>> wrote:
>>>
>>>> Hi,
>>>> You can store the timestamp of the last message of interest in a
>>>> transaction-persistent variable - that is, an AVP or XAVP - using $TV():
>>>>
>>>> https://www.kamailio.org/wiki/cookbooks/5.4.x/pseudovariables#tv_name
>>>>
>>>> Then, you can do some arithmetic like this to turn the difference
>>>> between two timestamps into milliseconds. This is stolen straight from CSRP
>>>> so adapt to your needs. :-)
>>>>
>>>> 	# Log request processing time.
>>>>
>>>> 	$var(cur_time) = $TV(Sn);
>>>>
>>>> 	$var(proc_diff) = (
>>>> 		(((
>>>> 		  $(var(cur_time){s.select,0,.}{s.int}) -
>>>> 		  $(avp(proc_start){s.select,0,.}{s.int})
>>>> 		) * 1000000)
>>>> 		+
>>>> 		(
>>>> 		 $(var(cur_time){s.select,1,.}{s.int}) -
>>>> 		 $(avp(proc_start){s.select,1,.}{s.int})
>>>> 		) / 1000) mod 1000
>>>> 	);
>>>>
>>>>
>>>> — Alex
>>>>
>>>> —
>>>> Sent from my iPad
>>>>
>>>> On Feb 9, 2021, at 9:40 AM, David Villasmil <
>>>> david.villasmil.work at gmail.com> wrote:
>>>>
>>>> Hello all,
>>>>
>>>>
>>>> Is it possible to know the elapsed time since the previously received
>>>> message?
>>>>
>>>> On outgoing calls, I.e: when i get a 180, how long did the 100 arrived?
>>>> Or the INVITE...
>>>>
>>>> Thanks
>>>>
>>>> David
>>>> --
>>>> Regards,
>>>>
>>>> David Villasmil
>>>> email: david.villasmil.work at gmail.com
>>>> phone: +34669448337
>>>>
>>>> _______________________________________________
>>>> 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
>>>>
>>> --
>>> Regards,
>>>
>>> David Villasmil
>>> email: david.villasmil.work at gmail.com
>>> phone: +34669448337
>>>
>>
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>>
> --
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com
> phone: +34669448337
> _______________________________________________
> 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
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>
-- 
Regards,

David Villasmil
email: david.villasmil.work at gmail.com
phone: +34669448337
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