[Users] Dispatching to and checking for trusted UACs

[Andreas Granig]

Hi,

I'd like to know how you guys on one hand accomplish the task of 
dispatching requests to trusted UACs grouped to destination classes 
(e.g. PSTN GWs, Media servers), and to check if an incoming request is 
from such a trusted UAC on the other hand.

Currently the following possibilities seem to be available:

- dispatcher-module: dispatching of outgoing requests based on 
destination classes using ds_select_dst/ds_next_dst, but no check for 
trusted incoming requests

- lcr-module: dispatching of outgoing requests using load_gws/next_gw 
and check for incoming requests using from_gw, but no support for 
destination classes

- permission-module: check for trusted incoming requests, but no 
outgoing dispatching

- a combination of dispatcher-module for outgoing requests and manual 
src-ip matching or permissions-module or lcr-module for checking trusted 
incoming requests

The problem with this is that maintaining these UACs gets unnecessarily 
complicated because there always has to be maintained two module config 
files or DB tables.

So I'm curious which approaches exist to accomplish this or if one 
module should be extended to combine these two tasks (e.g. adding 
destination class support for lcr or incoming src-ip check for 
dispatcher comes to mind)...

Thanks,
Andy