[OpenSIPS-Users] In-Dialog requests with B2B topology hiding

[Bogdan-Andrei Iancu]

Hi,

All sequential requests of the b2b dialogs will not be visible in the 
script. The fact that you get the ACK in the script means opensips b2b 
failed to match the ACK with any of the b2b dialogs.
And looking at the trace, this happens because of the bogus TO tag in 
the ACK request ; the bogus tag param is a result of the double TO hdr 
in the 200 OK from b2b to carrier :

U 192.168.191.149:6060 <http://192.168.191.149:6060> -> 
204.11.180.165:5080 <http://204.11.180.165:5080>
SIP/2.0 200 OK.
v: SIP/2.0/UDP 
204.11.180.165:5080;branch=z9hG4bK-f011bf3ff42d89f43e0b098e2a96b328.
f: "Anonymous" <sip:anonymous at mydomain.com 
<mailto:sip%3Aanonymous at mydomain.com>>;tag=3570555794-337860.
*t: <sip:15265414613 at ss.mydomain.com 
<mailto:sip%3A15265414613 at ss.mydomain.com>>;tag=B2B.470.299.*
i: 15070951-3570555794-337826 at msw1.telengy.net 
<mailto:15070951-3570555794-337826 at msw1.telengy.net>.
CSeq: 1 INVITE.
Content-Type: application/sdp.
*To: <sip:15265414613 at 192.168.194.130 
<mailto:sip%3A15265414613 at 192.168.194.130>>;tag=user-agent-6009.*
Contact: <sip:192.168.191.149:6060 <http://192.168.191.149:6060>>.
Server: OpenSIPS (1.8.2-notls (i386/linux)).
Content-Length: 224.


Once in short format "t", once in long forma "To" - this seems to be an 
issue in the b2b.

First of all be sure you are using the latest 1.8 sources from SVN (or 
use the SVN daily generated tarball) - I want to be sure you have all 
the fixes in your sources.

I tried to reproduce this scenario (pushing your INVITE into a b2b), but 
I failed to get the 2 "to" hdrs....

So: (1) update, (2) see if problem still there, (3) update me please.

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 02/23/2013 12:19 AM, Jeryes . wrote:
> Hi All,
>
>
> I am using Opensips 1.8.2 tls, with B2B UserAgent, running the default 
> scenario "top riding".
> The idea of this implementation is just to pass the packages between 
> the carrier and the PBX, hiding the topology.
> I'm facing a problem to process the ACK requests after 200 OK 
> (answer), and I guess that all the in-dialog requests after first 
> INVITE. The ACK requests are beeing forwarded
> by t_relay() method, but that is not keeping the previous dialog, 
> nether hiding the topology.
> Should I execute b2b_init_request("top hiding") to ACK requests as I 
> do to INVITE, or the top hiding scenario was supposed to generate the 
> ACK automaticaly to 200 OK reply, as is described in the tutorial 
> <http://www.opensips.org/Resources/B2buaTutorial#toc11>: "Once you ask 
> b2b to handle a call, you *won't see the future in-dialog request in 
> the normal route*."?
>
> Do someone has an example about how it is supposed to be the 
> processing of the in-dialog requests with b2b top hiding? Am I doing 
> something wrong in the script that follows?
>
> Thanks in advance!
>
> Here follows the opensips.cfg:
>
> [....]
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20130226/a324687b/attachment.htm>