[Devel] Dialog module updating timeout value on PRACK

Ron Winacott ronw at somanetworks.com
Thu Oct 5 22:58:03 CEST 2006

On Thursday 05 October 2006 2:17 pm, Dan Pascu wrote:
> On Thursday 05 October 2006 20:58, Ron Winacott wrote:
> > Bogdan,
> > 	With changes I am making to the SST module, I noticed that the dialog
> > module is updating the timeout value on a PRACK in the dlg_onroute()
> > callback. You ignore ACKs but you do not ignore PRACKs.  The fix is a
> PRACK as opposed to ACK is a method that has a reply. So if you do not
> reset the timeout, and the transaction timeouts before the PRACK answers
> comes back what will then happen with it?

Good point, but the problem is the AVP I am using to set the dialog timeout 
value is tied to the transaction, not the dialog. So the AVP is not available 
after the INVITE/200 OK request/response when the PRACK is seen. So the PRACK 
over writes the set timeout value of the dialog with the default value. 
(killing any changes I have made at INVITE/200OK time via the dialog timeout 

So, ether I need PRACK to stop resetting the dialog timeout or I need the AVP 
to be bound to the dialog and not the transaction so the dialog module 
will "remember" my value and not use the default.

As for your question about what will happen, is if the dialog times out in the 
middle of the PRACK/200OK transaction, then the dialog has timed out. In my 
case the Session Expire time has been reached and the PROXY is in its right 
to delete the dialog and free the resources because the session was not 
renewed with a reINVITE/UPDATE.


	ronw (karwin)

Ron Winacott - SOMA Networks, Inc.
Chaos, panic and disorder...my work here is done.

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