[Kamailio-Users] CDRTool and Prepaid

[Raúl Alexis Betancor Santana]

El Monday 01 September 2008 11:12:49 DanB escribió:
> Hi Matteo,
>
> I was in the same position like you are now, months back.
>
> At least in OpenSER (please note that 1.4 is no longer tagged as OpenSER,
> but Kamailio) it was hard to do call-control since SER like was not
> initially developed to be dialog aware server. Dialog module is coming
> slowly to be there but I have the feeling it will take a bit time more to
> have a mature product out.
>
> In the mean time I decided to go with an easier approach, so have installed
> Yate ( I am sure Asterisk or Freeswitch can do the same job as well, but it
> is just about having yate on hands on that time). In my case Yate will take
> the timeout value from Private SIP Header and process it as global timer of
> the call (Yate acts as SBC or B2BUA). 

In that scenario Yate is working as B2BUA not as SBC.

> If the call does finish before the
> timer is hit, Yate will do the job and disconnect both legs of the call
> (inbound and outbound) by sending BYE to both parties, therefore reaching
> the scenario wanted. However, this is considered like a security whole in
> Yate since anyone could achieve call disconnects by using the right private
> header, so u must set also an ip acl inside yate for the calls where u
> process the private-timer header.

In you put a Kamailio in front of Yate you could ensure taht private-timer 
headers are only there because Kamailio put them, so no security hole 
possible.

> I am at your disposal if you need further help with freeradius-cdrtool
> connector (planning to release out a new version soon, just hope that the
> time will stay still to give me that opportunity ;-) ).

In your solution, you have not considered the situation of two simultaneous 
calls from the same user.

-- 
Raúl Alexis Betancor Santana
Dimensión Virtual S.L.