Hi,
I'm trying to put together some configuration for unconditional call
forwarding. The carrier requires me to send the call with prefix "400"
in R-URI. Here are the relevant routes:
route[6]
{
if(avp_db_load("$ru/username","$avp(s:callfwd)")) {
avp_pushto("$ru", "$avp(s:callfwd)");
xlog("L_INFO", "forwarded to: $avp(s:callfwd)");
avp_delete("$avp(s:callfwd)");
$avp(i:25) = 20;
}
route(7);
}
route[7]
{
prefix("400");
rewritehost("XX.YY.ZZ.WW");
t_on_failure("2");
xlog("L_INFO", "Request leaving server, D-URI='$du' - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
t_relay("XX.YY.ZZ.WW:5060");
exit;
}
failure_route[2]
{
# forward on busy
if(t_check_status("(486)|(408)") && avp_pushto("$ru",
"$avp(s:callfwd)")) {
append_branch();
xlog("forwarded on $T_reply_code to: $avp(s:callfwd)");
avp_pushto("$du", "$avp(s:callfwd)");
avp_delete("$avp(s:callfwd)");
$avp(i:25) = 20;
route(7);
}
}
The problem is that while the call is sent to the first call forward
destination correctly (with prefix 400 in R-URI), it goes to the next
destination (triggered from failure_route) without the prefix in R-URI!
There are the following messages in the log file:
Nov 12 21:12:00 sip2 /usr/local/sbin/openser[52971]: forwarded on 408
to: sip:[email protected]
Nov 12 21:12:00 sip2 /usr/local/sbin/openser[52971]: 1 avps were removed
Nov 12 21:12:00 sip2 /usr/local/sbin/openser[52971]:
DBG:core:pv_get_dsturi: no destination URI
Nov 12 21:12:00 sip2 /usr/local/sbin/openser[52971]: Request leaving
server, D-URI='<null>' - M=INVITE RURI=sip:[email protected]
F=sip:[email protected] T=sip:[email protected]
IP=XX.YY.ZZ.WW [email protected]
Despite R-URI appears with 400, it is sent without the prefix as I've
confirmed by the trace.
That "no destination URI" line looked suspicious to me, in fact I would
expect that prefix() handles destination URI as well. I thought that
could be the case so I've added explicit "$du = $ru;" after prefix and
rewritehost. D-URI looks fine now, but it is still sent on the wire
without 400:
ov 12 21:59:29 sip2 /usr/local/sbin/openser[53183]: forwarded on 408 to:
sip:[email protected]
Nov 12 21:59:29 sip2 /usr/local/sbin/openser[53183]:
DBG:avpops:ops_pushto_avp: 1 avps were processed
Nov 12 21:59:29 sip2 /usr/local/sbin/openser[53183]: 1 avps were removed
Nov 12 21:59:29 sip2 /usr/local/sbin/openser[53183]: Request leaving
server, D-URI='sip:[email protected]' - M=INVITE
RURI=sip:[email protected] F=sip:[email protected]
T=sip:[email protected] IP=XX.YY.ZZ.WW
[email protected]
What is the problem?
--
Sincerely,
Andrew Pogrebennyk
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