[OpenSER-Users] Radius accounting and Dialog

[Iñaki Baz Castillo]

El Thursday 12 June 2008 14:38:44 David Villasmil escribió:

> > The problem is that you are addressing the problem in a privative way
> > while there are RFC's and techniques for that. For your proposal using
> > Session Timers should be the best option,
>
> Are you talking, i.e. Asterisk?

No, Asterisk is a bad example for this case since doesn't provide 
SessionTimers functions and so.
In fact I'm not suggesting a specific product, but you could try other B2BUA 
more SIP compliants and develop a B2BUA between OpenSer and gateways that 
implements SessionTimers. Of course it's not an easy task.

You can take a look at those projects:

http://www.b2bua.org/
http://www.resiprocate.org/Main_Page
https://sailfin.dev.java.net/
http://www.opensipstack.org/sbc_man_content.html



> > (at last one of both endpoinds). OpenSer cannot send it since it is a
> > proxy so a B2BUA or gateway should doit.
> > IMHO you are addressing the problem in the wrong place (but it could work
> > of
> > course).
>
> I see what you're saying, problem with this is I don't WANT to HAVE to use
> an asterisk or whatever... I want to depend only on Openser.

OpenSer is a statefull proxy, it shouldn't control dialogs. With "dialog" 
module you can do things but obviously is not so complete as you need.


> I believe I can be done with session timers, as you say. What I Don't KNOW
> is whether there is a timer to ask the UAC to send us a kind of
> "keep-alive" message. I don't know what that message is called, or what
> module creates it.

No one. The mos similar function in OpenSer is the registrar module sending 
NOT in-dialog OPTIONS to mantain NAT keepalive.


> The thing is:
>
> What module's function to use to make the UAC send uns a "keep-alive"
> whilst in a dialog every X senconds, setting a timeout for that keep-alive
> to be sent and resetting it everytime it's received.

There is not that function/module for now. :(


-- 
Iñaki Baz Castillo
ibc at in.ilimit.es