[OpenSIPS-Users] Restrictions using branch_route

[Bogdan-Andrei Iancu]

Hi John,

For the looping, you can use as stop condition the test    
$(branch(uri)[n]) == NULL - if the branch index you access does not 
exist, NULL will be returned.

Regarding your script - it is ok.  To answer to your question -> the 
branch route execution is done by t_relay() - in main route you just arm 
the triggering of a branch route (when the call will be send out) via 
t_on_branch(). The execution (at send time) is done internally by 
t_relay(). See:
       http://www.opensips.org/Resources/DocsCoreRoutes16#toc2

Regards,
Bogdan


John Quick wrote:
> Hi Bogdan,
>
> Thanks for answering this. I had looked at using a while statement and the branch() variable, but
> couldn't see how to end the while loop. Is there a pseudo-variable that gives the total number of
> branches?
>
> I eventually found this solution (the code is illustrative, not literal):
> route {
> ...
> 	exec_dset();
> 	t_on_branch("1");
> 	t_relay();
> }
>
> branch_route[1] {
> 	if (is_domain_local("$rd")) {
> 		route(2)
> 	}
> }
>
> route[2] {
> 	if (lookup("location","b")) {
> 		xlog("L_WARN", "Local UA has Contact:$ru; Location:$du\n");
> 	} else {
> 		drop();
> 	}
> }
>
> It seems to work ok, but I am still a bit uncertain if the t_relay() should be in the main route or
> the branch route or in route(2). Also I wonder how engage_media_proxy interacts with parallel forking
> if some branches need media proxy but others don't?
>
> John
>
>
>   
>> -----Original Message-----
>> From: Bogdan-Andrei Iancu [mailto:bogdan at voice-system.ro]
>> Sent: 01 December 2009 22:31
>> To: John.Quick at smartvox.co.uk; OpenSIPS users mailling list
>> Subject: Re: [OpenSIPS-Users] Restrictions using branch_route
>>
>> Hi John,
>>
>> well, if you use 1.6, you have a nice way to iterate through all the
>> branches directly from the request route, via the branch() variable:
>>     http://www.opensips.org/Resources/DocsCoreVar16#toc14
>>
>> So, you could iterate (using the index and "while" statement) through
>> all the existing branches and do whatever you want to do directly from
>> request route.
>>
>> Regards,
>> Bogdan
>>
>> John Quick wrote:
>>     
>>> This question follows on from an earlier one about finding a way to process each uri in a
>>>       
>> destination
>>     
>>> set. The main route calls exec_dset which returns a destination set (a list of URI's). I then
>>>       
>> need to
>>     
>>> process each URI from that set, particularly by checking the URI against the registered UAC's
>>>       
>> stored
>>     
>>> in the location server. AOR has to be converted to the registered IP address and port of the UAC
>>> before the request is relayed.
>>>
>>> If it was a single URI I would just call lookup("location"). When it is a destination set, the
>>>       
>> only
>>     
>>> way I have found to process the destinations one at a time is by calling t_on_branch("1") and
>>>       
>> defining
>>     
>>> a branch_route. However, in the branch_route section it is not permissible to call
>>>       
>> lookup("location").
>>     
>>> Any suggestions please?
>>>
>>> John Quick
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opensips.org
>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>>
>>>       
>> --
>> Bogdan-Andrei Iancu
>> www.voice-system.ro
>>     
>
>
>
>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro