[OpenSIPS-Users] Opensips : Diaglog Topology hidding and ACK Loop

[Rudy]

Bogdan,
I have seen this happen before also, glad
Thanks in advance,
--Rudy
Dynamic Packet
Toll-Free: 888.929.VOIP ( 8647 )


On Thu, Nov 1, 2012 at 9:28 AM, Bogdan-Andrei Iancu <bogdan at opensips.org>wrote:

> **
> Hi Pierre-Yves,
>
> Thanks for the detailed report - indeed, it seems to be a problem with the
> dialog matching (for sequential request) when having topology hiding in
> combination with spiraling (as your call goes twice through opensips with
> topo hiding).
> We will work on a patch as fast as possible (the fix was identified).
>
> Regards,
>
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developerhttp://www.opensips-solutions.com
>
>
> On 10/31/2012 04:59 PM, Pierre-Yves Marche wrote:
>
> Hello,
>
> I'm facing an issue of ACK Looping using opensips.
>
> the configuration is the following :
> - Opensips v1.8.1 (same problem with 1.7.2).
>   - using dialog "topology hidding" feature.
>   - using 2 @IPs (one to reach customers, one to reach SIP Platform)
> (mhomed=yes)
>
>
> Customer1/2 <--->Opensips (topology hidding)   <----> SIP Platform
>
> The call flow is the following: Customer1 call Customer2, both are
> connected on the same Opensips
> (when Customer1 and Customer2 are located on different opensips, no
> problems)
> Customer1 <-->opensips <--->SIP Platform <-->opensips  <-->Customer2
>
>
> INVITE/180/200 sequence is working well.
>
> But the ACK of the 200 OK is looping between Customer2 -->Opensips -->SIP
> Plateform -->*Opensips -->SIP Platform--->Opensips*... instead of doing
> directly
> Customer2--->Opensips --->SIP Plateform -->Opensips -->Customer1
>
>
> Attached, a network capture taken on opensips server.
>
>
> I had a look at "dlg_list", 2 dialogs are created for this call. Might be
> a problem with did matching ? I tested with
> modparam("dialog", "dlg_match_mode", 0) and
> modparam("dialog", "dlg_match_mode", 2)
>
>
> Could someone help me fixing the issue ? Do you have some hints of the
> root cause of issue ?
>
>
> Regards,
> Pierre-Yves
>
>
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