[OpenSIPS-Users] b2b module issue with PRACK on multiple provisional responses

[Bogdan-Andrei Iancu]

Hi Giuseppe,

Do you see in your logs any entries for "b2b_tm_cback" when the 180 is 
processed ?

Regards,

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

On 09.08.2014 19:39, Giuseppe Cardone wrote:
> Hi,
>
> I'm trying out the b2b module on opensips and have encountered an 
> issue regarding PRACK.
>
> In particular I have a scenario where the called number replies with a 
> 183 session progress (Require: 100rel and RSeq: 1) and then a few 
> seconds later with a 180 Ringing (Require: 100rel and RSeq: 2).
>
> What happens is that opensips correctly replies with a PRACK to the 
> 183 response but then doesn't do the same when it receives the 180 
> provisional response.
>
> Excerpts from the logs show this happening when the 183 message is 
> received:
>
> Aug  9 17:31:14 [2528] DBG:b2b_entities:b2b_tm_cback: Found require hdr
> Aug  9 17:31:14 [2528] DBG:b2b_entities:b2b_tm_cback: Found 100rel header
> Aug  9 17:31:14 [2528] DBG:b2b_entities:b2b_send_req: start type=1
>
> but when the 180 response arrives, there are no similar entries.
>
> It is my understanding that from a SIP signalling point of view the 
> b2b module should reply with a PRACK to the 180 response too or am I 
> missing something ?
>
> Any ideas as to why this may be happening or could it be a bug ?
>
> Many thanks,
> Giuseppe
>
>
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