Hi,
yeah, the script does call rtp_offer for 200 OK and rtp_answer for ACK. So, no problem there.
Emil
Am Thu, 10 Feb 2011 09:46:04 +0100 schrieb Carsten Bock lists@bock.info:
Hi,
just a hint: If you use rtpoffer/answer for SDP in 200ojk/ACK, the SDP-Offer is in the 200 OK, so you need to call "rtp_offer" for the 200 OK instead of the usual "rtp_answer" for the 200 OK. The ACK/SDP contains then the rtp_answer. Works like a charm for me....
Carsten
2011/2/10 Emil Kroymann emil.kroymann@isaco.de:
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@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@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@isaco.de Tel: +49-30-203899885
ISACO GmbH Kurfürstenstraße 79 10787 Berlin Germany
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SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-- Emil Kroymann VoIP Services Engineer
Email: emil.kroymann@isaco.de Tel: +49-30-203899885 Mobile: +49-176-38389303
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@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users