Ovidiu Sas wrote:
Hi Klaus,
You can use the fr_timer from the tm module: http://openser.org/docs/modules/1.1.x/tm.html#AEN108
If you don't get any reply from the far end, this timer will fire.
I recently had a look at the timer related source code and that is what I wrote down:
- Each SIP transaction has a final response timer (FRT)
- SIP transactions fail (failure_route, status 408) when FRT fires
- TM module exposes final response timers (FRT) fr_timer and fr_inv_timer (can be set using AVP)
- INVITE transactions: FRT initially equals fr_timer and gets set to fr_inv_timer after receiving first provisional response
- setting fr_timer to a low value (e.g. 3s) allows for fast INVITE failover
So I'm setting fr_timer to a low value for local INVITE transactions. Local here means sessions between endpoints from our network domain. Something along the lines:
route[0] { if (method==INVITE) { # set fr_timer to 3 seconds avp_write("i:3", "$avp(fr_timer)"); # call FAILURE_DEFAULT_RELAY routing block on transaction failure t_on_failure("FAILURE_DEFAULT_RELAY"); t_relay(); exit; } } failure_route[FAILURE_DEFAULT_RELAY] { # status 408 ? transaction timed out if (t_check_status("408")) { # try next target if (ds_next_domain()) { t_relay(); } } }
- Christian
Regards, Ovidiu Sas
On 12/18/06, Klaus Darilion klaus.mailinglists@pernau.at wrote:
Hi!
i wonder if there is a timer which controls the timeout for provisional replies.
E.g. I want to cancel an INVITE and retry another gateway if the gateway does not respond with 100 (or 180) in a certain time.
regards klaus
-- Klaus Darilion nic.at
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