[OpenSIPS-Users] B2B Ack issue

[Anca Vamanu]

Hi Bruce,

It is clear now what happens - you have to upgrade the b2b modules to 
the svn version because there is a problem in the stable release.
In there the from tag in the generated is constructed as the 
concatenation of from tag and callid from the initial request. The 
problem is that most clients put in the callid '@ip address' and @ is an 
illegal character in from tag. So the from tag in you case was:

From: 
<sip:0100000715 at 41.x.x.66>;tag=call-F1030790-3656-2D10-1919-AB at 192.x.x.154c0a8c89a-4f7

And the destination uri for the ACK became:

DBG:tm:t_uac: 
next_hop=<sip:41.x.x.33;lr=on;ftag=call-F1030790-3656-2D10-1919-AB at 192.x.x.154c0a8c89a-4f7;vsf=AAAAAFlyXxh7QkwaAQVydAUfHAADHxsbGAA2>

The parser then concluded that the domain was the string after '@': 
192.x.x.154c0a8c89a-4f7 - and it tried doing a look up on this.

This problem is fixed in the svn branch as illegal characters are not 
allowed anymore. Please update.

Regards,

-- 
Anca Vamanu
www.voice-system.ro


On 06/10/2010 01:35 AM, Bruce Borrett wrote:
> Hi
>
> I have copied a config from one of the B2B tutorials, and only made 
> one or two small changes to it. The problem I am having is that when 
> an ACK is sent by the caller after receiving a 200, opensips tries to 
> do a dns lookup on the source ip of the ACK for some reason. I do not 
> have dns set up and am not using domain names anywhere.
>
> Here is a sip trace of the call:
> http://pastebin.com/iDvVgk2B
>
> And here is a debug:
> http://pastebin.com/teSuTp7E
>
> Thank you in advance..
>
> Regards,
> Bruce
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>    


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