[OpenSIPS-Users] Opensips2.2 Asterisk Sub registartion

[Bogdan-Andrei Iancu]

Hi Kirill,

I suppose you want to pass the registration to Asterisk, after is was 
authenticated (and eventually saved) by OpenSIPS, right ?

To do this in the correct way (from SIP perspective), after you have 
authenticated the REGISTER on OpenSIPS, you forward it to Asterisk 
_WITHOUT_ saving it into OpenSIPS. When you receive the reply back from 
Asterisk, you do the save("location") in OpenSIPS. Why ? as in this 
registration chain, Asterisk is the main final registrar and it may 
change the registration expire value:
Ex:
     * UAC sends register with 100 secs to OpenSIPS
     * OpenSIPS save() and has UAC registered for 100 secs
     * OpenSIPS relays/creates register to Asterisk with 100 secs
     * Asterisk decides to store registration only for 60 secs and 
returns reply with expires=60
Result ? OpenSIPS will have UAC registered for 100 and Asterisk for 60, 
while the UAC thinks it is registered for 100 (according to the reply 
from OpenSIPS) - this is totally bogus.

Correct flow:
     * UAC sends register with 100 secs to OpenSIPS
     * OpenSIPS relays/creates register to Asterisk with 100 secs
     * Asterisk decides to store registration only for 60 secs and 
returns reply with expires=60
     * OpenSIPS receives the reply from Asterisk and saves UAC 
registration for 60 secs too
     * OpenSIPS sends reply to UAC withe expires 60
Result ? OpenSIPS will have UAC registered for 60 and so Asterisk ; UAC 
thinks it is registered for 60 (according to the reply from OpenSIPS) - 
this is 100% correct.

Conclusion - when you do have a registration chain, on the intermediary 
registrar you do save() on 200 OK as the next registrar may change the 
expire value.

So, simply use the save() function in onreply_route when receiving the 
REGISTER reply from Asterisk:
http://www.opensips.org/html/docs/modules/2.2.x/registrar.html#id294033

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 14.06.2016 13:42, Kirill Galinurov wrote:
> Hi all. How i can do subregistration on asterisk like in kamaillio.
> http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb. 
>
> I have some webrtc users/ They register on opensips.
>
>
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> Users mailing list
> Users at lists.opensips.org
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