[OpenSIPS-Users] [OpenSIPS-Devel] Planning next release - Roadmap

[Ovidiu Sas]

Yes, you are right, that's I dumped the idea and switched to the b2bua
module idea.

Regards,
Ovidiu Sas

On Tue, Aug 26, 2008 at 10:42 AM, Iñaki Baz Castillo <ibc at in.ilimit.es> wrote:
> El Tuesday 26 August 2008 16:30:55 Ovidiu Sas escribió:
>> This is a little bit tricky, because you need to keep tracking of the
>> cseq for the received and sent message (each OPTION will increase the
>> sent cseq number).  Each in dialog request that will come from the far
>> end UAC will need to have the cseq altered to be in synch with the
>> previous sent OPTION.
>> It can be done, but it is more work.  Sending OPTIONS from the dialog
>> module itself is quite easy.  I implemented and tested that, but then
>> I got lazy in implementing the cseq mangling stuff.
>
> If a proxy changes the CSeq in a request it must also change it in the
> responses to the client.
>
> Also note the problem handling PRACK since a PRACK message is an in-dialog
> request containing CSeq and Rseq, and the reply must contain Cseq and RAck.
> Example:
>
> UAC  -------->   UAS
>
>  INVITE --->
>  Cseq: 10
>
>     <-- 180
>          CSeq: 10
>          Require: 10res
>          Rseq: 555
>
>  PRACK --->
>  Cseq: 11
>  RAck: 555 10
>
>
> So IMHO it's not so easy to handle and modify it in a proxy. Also this seems
> to me more a B2BUA task.
>
>
> --
> Iñaki Baz Castillo
> ibc at in.ilimit.es
>
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