[asterisk-users] How to get "Call-ID" SIP header outside "chan_sip" scope ...

[Mauro Sergio Ferreira Brasil]

Hello there!

I'm working on some modifications on Asterisk to adapt it to our needs 
considering some particular demandings of the infraestructure we want to 
provide.
Two of these modifications are:

1- A proprietary configuration driver that will communicate with a 
server that will be the source of information for the entire 
infraestructure; and,
2- A call control application that will be responsible for call timing 
control and pre-paid support;

Here we are prioritizing internal modifications and loadable modules 
(like modules, applications, etc) against external AGI components to 
acchieve the best performance possible for the entire solution.

One problem we have here is to find out the best option (even one that 
results on some internal Asterisk files changing) that allow us to 
propagate the SIP header "Call-ID" to both modules described above.
The best shot we have until now is to use the "callid" field from the 
"sip_pvt" structure of SIP channel, what will lead us to two 
considerable code changes: 1- Propagate the channel to method 
"realtime_var_get" of our proprietary ARA driver; and 2- Duplication of 
necessary structs to a header (".h") file so the modules can "navigate" 
on private structure "sip_pvt".
The first change isn't big deal. But the need of validation of the 
second modification, every time we make a merge with updated codes is 
concerning me a lot.

Does anyone have a better approach to get this done ?

Thanks and best regards,

-- 
__At.,                                                                                                                             
   _
 
*Technology and Quality on Information*
Mauro Sérgio Ferreira Brasil
Coordenador de Projetos e Analista de Sistemas
+ mauro.brasil at tqi.com.br <mailto:@tqi.com.br>
: www.tqi.com.br <http://www.tqi.com.br>
( + 55 (34)3291-1700
( + 55 (34)9971-2572