[Serusers] How to do a large number of relay attempts?

[Greger V. Teigre]

Yes, you need to append a new branch to initiate a new transaction.  Your 
best bet, however, is to use lcr module and the q-value to serialize the 
contacts. LCR is in CVS head and in the experimental module for 0.9.x.
g-)
----- Original Message ----- 
From: "Tim Klein" <tkpublic at timklein.fastmail.fm>
To: <serusers at lists.iptel.org>
Sent: Tuesday, November 22, 2005 2:39 AM
Subject: [Serusers] How to do a large number of relay attempts?


> Imagine I have 50 salespeople, and I know the URIs of all of their phones. 
> When an INVITE comes in to SER, I want to keep trying to forward it to the 
> salespeople, one at a time (in series, not in parallel), forever or until 
> one of them accepts the call.  (I randomize the order.)
>
> QUESTION 1:
> At first, I tried rewriting the Request URI in a failure route each time 
> t_relay() returned failure, and then calling t_relay() again. But 
> t_relay() doesn't work that way -- when used in a failure route, it 
> requires you to append a branch, and apparently ignores any changes in the 
> Request URI after the failure happens.
>
> OK, so in my failure route, I'll append a branch instead of rewriting the 
> Request URI.  But the default value of MAX_BRANCHES in config.h is only 
> 12.  I think this means I can never try to relay to more than 13 
> salespeople -- the first t_relay() call, plus 12 t_relay() calls in 
> failure routes.  Is this correct?
>
> QUESTION 2:
> OK, so I'll make the value of MAX_BRANCHES greater than 12.  But I see in 
> modules/tm/tm.c that MAX_BRANCHES cannot be given a value greater than 31, 
> since each branch occupies one bit in a 32-bit bitmap.  So how can I do 50 
> stateful relays?  Or, for that matter, an indefinite number?
>
> Thank you for any help!
>
> Tim
>
>
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