[SR-Users] Time elapsed since previous message.
Alex Balashov
abalashov at evaristesys.com
Wed Feb 10 20:47:04 CET 2021
Have you tried drop()ping the end-to-end `487 Request Terminated` reply
from upstream in a failure_route, and then send_reply() in its place?
-- Alex
On 2/10/21 2:43 PM, David Villasmil wrote:
> 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
> <mailto: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
>> <mailto: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 <mailto: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
>> <mailto:david.villasmil.work at gmail.com>>
>> *Para: *"Kamailio (SER) - Users Mailing List"
>> <sr-users at lists.kamailio.org <mailto: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
>> <mailto: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
>> <mailto: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
>> <mailto: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
>> <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 <http://s.int>}) -
>> $(avp(proc_start){s.select,0,.}{s.int <http://s.int>})
>> ) * 1000000)
>> +
>> (
>> $(var(cur_time){s.select,1,.}{s.int <http://s.int>}) -
>> $(avp(proc_start){s.select,1,.}{s.int <http://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
>> <mailto: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
>> <mailto:david.villasmil.work at gmail.com>
>> phone: +34669448337
>>
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>>
>> --
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> <mailto:david.villasmil.work at gmail.com>
>> phone: +34669448337
>>
>>
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>>
>> --
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> <mailto:david.villasmil.work at gmail.com>
>> phone: +34669448337
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>> <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
> <mailto:david.villasmil.work at gmail.com>
> phone: +34669448337
>
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> 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/
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