[OpenSIPS-Devel] Proposal: new timer in dialog module

Bogdan-Andrei Iancu bogdan at opensips.org
Tue Dec 11 14:33:32 CET 2012


Hi Federico,

OK, prefect :)

Regards,

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


On 12/11/2012 03:32 PM, Federico Cabiddu wrote:
> Thanks for your answer Bogdan. I tried your suggestion and, of course, 
> it works. I should have thought this before.
>
> Best regards,
>
> Federico Cabiddu
>
>
> On Tue, Dec 11, 2012 at 1:08 PM, Bogdan-Andrei Iancu 
> <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>
>     Hi Federico,
>
>     you can achieve the same by using the standard dialog timeout -
>     when the dialog is created, you set a dialog timeout to reflect
>     the timeout for ACK . When the ACK is received, you can set a new
>     dialog timeout to reflect the dialog lifetime (as established).
>
>     All these you can do from script, using the dialog_timeout avp.
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     http://www.opensips-solutions.com
>
>
>     On 12/10/2012 01:05 PM, Federico Cabiddu wrote:
>>     Hi all,
>>     recently I had the need to be able to terminate a call if the ACK
>>     to the 200 OK of an INVITE was not received after a short time.
>>     Since I was using the dialog module the natural place where to
>>     implement such kind of timer seemed to be the dialog module. So I
>>     added to the module two new parameters:
>>
>>     - default_ack_timeout (integer): default to 0
>>     - ack_timeout_avp (string)
>>
>>     The behavior is the following:
>>
>>     - upon the reception of the 200 OK, if default_ack_timeout is > 0
>>     or if the ack_timeout_avp is set, the timer is armed
>>     - if the ACK message arrives before the timeout is reached, the
>>     dialog lifetime is restored to the value set by default_timeout
>>     or timeout_avp
>>     - if the ACK message doesn't arrive before the timeout is
>>     reached, the dialog is deleted (closed with BYE if the B flag was
>>     used in the dialog creation)
>>
>>     I admit that this goes against rfc 3261, but for our current case
>>     (in which we cannot wait for the retransmission timeout of the
>>     callee) it works. If you think that it's a feature it's worth
>>     having I can provide the patch I'm currently using.
>>
>>     Best regards,
>>
>>     Federico Cabiddu
>>
>>
>>     _______________________________________________
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>
>
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