Hi All,
I would like to reduce the time it takes for kamailio to timeout an
initial message to a dispatcher destination so that it will select the
next destination in the set, before, hopefully, a restransmission. In
this case I am testing registration messages.
I came accross the t_set_fr() function in the TM module documentation
today and have been experimenting with it for some hours. I have an
issue where a 408 timout is sent back to the UAC before the last
destination in the dispatcher set is selected, I suspect I am hitting
the timeout somewhere, but I cannot see where, I presume the fr_timeout
is set every time I issue the t_set_fr() call and the associated t_relay.
I'm just wondering if I am doing this correctly, if one of the guru's
out there wouldnt mind casting an eyeball over this config and let me
know if I am on the right track, or if I am going about this in the
wrong way. Any suggestions are most welcome.
What appears to be happening is, I have 3 destinations in the dispatcher
set, it looks like the 1st 2 are tried, which correctly timeout and are
set inactive-probing, but on the last destination, which is working, I
appear to be getting a 408 timeout being sent back from kamailio.
Here is a snip of my configuration:
#!define NO_RESPONSE_TIMER 250
request_route {
t_on_failure("DISPATCHER_FAILURE");
t_set_fr(0, NO_RESPONSE_TIMER);
if(!ds_select_dst("1", "0")) {
xlog("L_ERR", "No dispatcher destinations available for $ru\n");
sl_send_reply("500", "No destination available");
exit;
}
route("RELAY")
}
route[RELAY] {
if (!t_relay()) {
sl_reply_error();
}
exit;
}
failure_route[DISPATCHER_FAILURE] {
if (t_is_canceled()) {
exit;
}
# select next destination only for local timeout
if (t_branch_timeout() && !t_branch_replied()) {
xlog("L_INFO", "route[DISPATCHER_FAILURE] : $rm : timeout and
no reply ($si:$sp->$Ri:$Rp->$du)\n");
xlog("L_INFO", "route[DISPATCHER_FAILURE] : $rm : setting $du
to probing state");
ds_mark_dst("ip");
if(ds_next_dst()) {
xlog("L_INFO", "route[DISPATCHER_FAILURE] : $rm : next
destination selected ($du)\n");
t_set_fr(0, NO_RESPONSE_TIMER);
t_relay();
exit;
} else {
xlog("L_INFO", "route[DISPATCHER_FAILURE] : $rm : No
destinations available for $rd");
send_reply("500", "No destination available");
exit;
}
}
}
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