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

[Alex Balashov]

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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