[Kamailio-Users] Identifying branch in ONREPLY-ROUTE?

[Alex Balashov]

I suppose I can extract the 'branch' parameter from the topmost Via: in 
the reply, but are there are any prebuilt API/module functions for 
manipulating the Via?  Or is it plain old textops time?

Alex Balashov wrote:

> What is the simplest way to identify the branch (by branch index) to 
> which a reply belongs in an ONREPLY-ROUTE?
> 
> I have parallel forking with my registrar and do passive call 
> statekeeping.  The problem is that it must be branch-aware;  I need to 
> know if, for example, I got a successful provisional reply on one branch 
> of the call and a failure on the other, and deal with those separately.
> 
> Right now my statekeeping information is keyed by Call-ID, but since 
> that persists across two branches, obviously some sort of 
> branch-identifying information has to be present.
> 
> I've tried setting a persistent variable to the value of $T_branch_idx 
> inside a BRANCH-ROUTE, but in ONREPLY-ROUTE that just shows up with the 
> most recent branch index, regardless of which branch the reply actually 
> came in on.
> 
> I'm probably missing something quite obvious here, so I ask - how do I 
> incorporate some form of branch awareness into ONREPLY-ROUTEs?  I really 
> do not care what form that is - be it branch index, or some other 
> built-in value, as long as it is consistent.
> 


-- 
Alex Balashov
Evariste Systems
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