[OpenSIPS-Users] Issue with call scenario.

[Bogdan-Andrei Iancu]

Hi Miha,

It looks like the UAC is doing a retransmission of the INVITE with 
credentials - do you have enabled the nonce checking for re-usage (see 
http://www.opensips.org/html/docs/modules/1.11.x/auth.html#id293610) ?
If is active, the first INVITE with be accepted by auth and pushed for 
further routing; while the re-transmission will die in auth (as the 
nonce was already used) and a challenge will be sent back. Basically the 
initial INVITE and the re-transmission are differently handled, which is 
not right.

What to do ? either disable the nonce checking (as both INVITEs will 
succeed in auth) or do re-transmission checking before auth code (use 
t_newtran() for that).

Regards,

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

On 23.05.2014 10:46, Miha wrote:
> Hi,
>
> I am noticing strange thing. On one of our UAC's we are experiancing 
> strange behaviour.
>
> UAC -> INVITE->OPENSIPS
> OPENSIPS->Proxy_Autehentication->UAC
> UAC->ACK->Opensips
> UAC->INVITE(with credentials)->OPENSIPS
> UAC->INVITE(with credentials)->OPENSIPS
> OPENSIPS->Proxy_Autehentication->UAC
> ..
> .
> .
> .
> Why is sending Opensips again Proxy_autehntication? After second time 
> call is accepted but then UAC behaves strange.
>
> Here is sip trace: http://pastebin.com/zigbJTRd
>
> tnx!
>
> br
> miha
>
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