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@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@gmail.com>
Para: "Kamailio (SER) - Users Mailing List" <sr-users@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
phone: +34669448337


On Tue, Feb 9, 2021 at 3:31 PM David Villasmil <david.villasmil.work@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@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():


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@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
phone: +34669448337
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users@lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users@lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Regards,

David Villasmil
phone: +34669448337

_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users@lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users@lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Regards,

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