[sr-dev] Proposal: New Dialog Module Design

[marius zbihlei]

Iñaki Baz Castillo wrote:
> Hi, due to the long thread about "improving the dialog module"
> (http://lists.sip-router.org/pipermail/sr-dev/2010-March/006378.html)
> I've decided to create a wiki page in Kamailio's web site in order to
> propose a new design for the module.
>
> Please check it:
>
>   http://www.kamailio.org/dokuwiki/doku.php/dialog-stateful:new-dialog-module-design
>
>
>   

Hello Iñaki,

I have a small question regarding a spiral case.

If I got everything correct the proxy will create 2 dialog_in entries 
one for the original INVITE and one for the spiraled one (*NOTE*: Even 
if a spiral remains being the same dialog, from the point of view of the 
Dialog module a new dialog is generated when same INVITE arrives again 
to the proxy after doing a spiral. ).  When a >100 answer is received 
from the caller, 2 dialog_out entries will be created (one for each 
dialog_in value). These two  out dialogs will have the same to_tag but 
refer to different dialog_in ids (the one of the INVITE and the one of 
the spiraled INVITE).

If a final answer is received (a 200 OK) how will the dialog module know 
to match the reply to the correct dialog_out, having in mind that the 
match is done via to_tag?

Greetings
Marius