[OpenSIPS-Users] Re-Invite and 491 Request Pending

[Bogdan-Andrei Iancu]

Hi Alejandro,

The "fix" you have there does not make too much sense....as t_relay() 
does internally a t_newtran() :)....

Another thing is that opensips does not generate a 491 by 
itself....probably it generate by an upstream party...

Do you have a SIP capture from opensips machine, showing both inbound 
and outbound traffic?

Regards,
Bogdan

On 04/19/2011 02:50 AM, Alejandro Rios P. wrote:
>
> Hi all
>
>
> OpenSIPs seems to be sending a 491 Request Pending when a lot of 
> RE-INVITES are received.
>
>
> I found out the following threads regarding this problem:
>
> http://opensips.org/pipermail/users/2010-May/012724.html
>
> http://www.mentby.com/Group/opensips-users/re-invite-problem-gt-491-request-pending.html
>
>
> So, it seems that I could get rid of that error by adding a 
> t_newtran()  before t_relay() when I handle an ACK:
>
> http://www.opensips.org/html/docs/modules/1.6.2/tm.html#id294024
>
> Like this:
>
> /        if ( is_method("ACK") ) {/
>
> /                if ( t_check_trans() ) {/
>
> /                        # non loose-route, but stateful ACK; must be 
> an ACK after a 487 or e.g. 404 from upstream server/
>
> /t_newtran();/
>
> /                        t_relay();/
>
> /                        exit;/
>
> /                } else {/
>
> /                        # ACK without matching transaction ... ignore 
> and discard.\n");/
>
> /                        xlog("L_WARN", "[$mi] discarding ACK\n");/
>
> /                        exit;/
>
> /                };/
>
> /        };/
>
>
> But I'm not sure if this is correct. I'd appreciate any comments to 
> see if I missed something before testing live.
>
>
> Thank you and best regards,
>
>
> Alejandro Rios Peña
>
>
>
>
> DISCLAIMER: The opinions expressed are my own, and not necessarily 
> those of my employer.
>
>
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> Users at lists.opensips.org
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-- 
Bogdan-Andrei Iancu
OpenSIPS eBootcamp - 2nd of May 2011
OpenSIPS solutions and "know-how"

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