[SR-Users] nathelper-module and sdp offer in 200 OK

[Emil Kroymann]

When I checked the code of the nathelper module that we are using,
it didn't seem to be the case, that to and from tags are switched
for the ACK request. Maybe, something has been changed after the 
point we checked out sip-router. When was this code last changed?

Am Wed, 9 Feb 2011 12:51:29 -0500
schrieb Ovidiu Sas <osas at voipembedded.com>:

> The code seems to be correct.  The to and from tags are switched for:
>  - reply with offer (200ok with first SDP)
>  - request with answer (ACK with second SDP)
> 
> Are you sure that you are properly invoking offer/answer rtpproxy
> functions?
> 
> 
> Regards,
> Ovidiu Sas
> 
> On Wed, Feb 9, 2011 at 11:48 AM, Emil Kroymann
> <emil.kroymann at isaco.de> wrote:
> > Hi,
> >
> > We recently had a problem with the nathelper module and rtpproxy in
> > a scenario where the SDP offer is sent only in the 200 OK. We use
> > sip-router 3.1 and rtp-proxy from git master. The sip-router
> > configuration uses the rtpproxy_offer() and rtpproxy_answer()
> > functions in appropriate places. The problem is, that the arguments
> > sent to the rtpproxy, when the ACK with the sdp answer arrives,
> > seems to be not in the order, that rtpproxy expects.
> >
> > On the 200 OK, the nathelper module sends callid, to-tag, from-tag
> > to rtpproxy. On the ACK, the nathelper module sends callid,
> > from-tag, to-tag (with different command prefixes, of course, but I
> > cannot remember them atm). The version of rtpproxy that we are
> > using seems to expect, that the order of arguments sent on the ACK
> > request is the same as on the 200 OK.
> >
> > My question: are there any module parameters, to correct this
> > behaviour?
> >
> > Regards,
> >
> > Emil
> > --
> > Emil Kroymann
> > VoIP Services Engineer
> >
> > Email: emil.kroymann at isaco.de
> > Tel: +49-30-203899885
> >
> > ISACO GmbH
> > Kurfürstenstraße 79
> > 10787 Berlin
> > Germany
> >
> > Amtsgericht Charlottenburg, HRB 112464B
> > Geschäftsführer: Daniel Frommherz
> >
> >
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
> > list sr-users at lists.sip-router.org
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> >
> >
> 



-- 
Emil Kroymann
VoIP Services Engineer

Email: emil.kroymann at isaco.de
Tel: +49-30-203899885
Mobile: +49-176-38389303

ISACO GmbH
Kurfürstenstraße 79
10787 Berlin
Germany

Amtsgericht Charlottenburg, HRB 112464B
Geschäftsführer: Daniel Frommherz

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