[OpenSIPS-Users] Accounting Invite Retransmissions and NATed Registrations

[Bogdan-Andrei Iancu]

Hello Nathaniel,

In script, for initial requests, you can use t_newtran() (very 
aggressive approach) or t_check_tras() in order to detect 
retransmissions. Do that before doing any other particular processing 
for the INVITE (the idea is to detect the retransmission asap, before 
doing anything else).

t_check_trans() checks if it is a retransmission (by looking into the 
existing transactions in memory), but does not create a transaction if 
not a retransmission - the transaction will be created later, by t_relay().

t_newtran() checks and create transaction if not retransmission.

Regards,

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


On 05/01/2013 08:03 AM, Nathaniel L Keeling III wrote:
> Hello,
>
> I have a couple of questions I would like to ask. First, I have a 
> client that is sending the initial Invite twice and I would like to 
> know how to detect this within the script? The dual invites are 
> causing double accounting and other minor issue. Second, I have a 
> scenario where I have p1 send all registrations requests to p2 to 
> process requests. Registration of user is successful, but when you try 
> and call the user, opensips can not complete the call even though the 
> user is found in the location table. How can I resolve this. Also, the 
> user is behind a NAT.
>
> Thanks
>
> Nathaniel L Keeling
>
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