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

[Giuseppe Cardone]

Hi, 

does anyone have any ideas on this issue ? 
I'm using opensips 1.11 by the way. 

Many thanks, 
Giuseppe 

----- Messaggio originale -----

> Da: "Giuseppe Cardone" <g.cardone at unidata.it>
> A: "OpenSIPS users mailling list" <users at lists.opensips.org>
> Inviato: Sabato, 9 agosto 2014 18:39:42
> Oggetto: b2b module issue with PRACK on multiple provisional
> responses

> 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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