[OpenSER-Users] t_relay can not handle PRACK retransmission

[Klaus Darilion]

Bogdan-Andrei Iancu wrote:
> Hi Klaus,
> 
> PRACK is processed as any other request, nothing special.
> 
> Is the retransmission hitting the same process as the original request? 
> how was the PRACK originally handled ?

PRACK is handled like all other in-dialog requests:

if (loose_route()) {
    ... some NAT checks for INVITE...
    if (!t_relay()) {
	sl_reply_error();
    }
}

The strange thing is that the first PRACK is forwarded by t_relay, but 
the retransmission generates the error.

I have checked the retransmission: it is exactly the some message as the 
first PRACK.

regards
klaus

> 
> Regards,
> Bogdan
> 
> Klaus Darilion wrote:
>> Hi!
>>
>> I have encountered this problem at an openser 1.1.1 proxy:
>>
>>
>> Client         Proxy           Client
>>
>>    ---PRACK------>
>>                   ------PRACK----->
>>
>>
>> retansmission
>> -----PRACK------->
>>
>> here at this point (when openser receives the PRACK retransmission) 
>> t_relay fails:
>>
>> ERROR: t_newtran: transaction already in process 0xb66e7880
>>
>>
>> Is this a known problem? Were there some fixes to 1.1 or 1.2 branch?
>>
>> regards
>> klaus
>>
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>>   
>