8 Dec
2008
8 Dec
'08
2:36 p.m.
Something fishy is going on with my routing. If my SIP UA
(91.XXX.XXX.80) hangs up before the receiving end (pstn on
212.YYY.YYY.84) answers, it keeps ringing forever. Below is my routing
in regards to CANCEL and the ngrep output. If I understand things
correctly, I should send a 487 Request Terminated back to the initiating
UA (sip), and I would get a 487 Request Terminated from the pstn provider.
I'm not sending the 487 to the UA, and I'm guessing I close the session
before my pstn provider sends one to me, so I don't see it with ngrep?
The big question is ofcourse what I need to do to get on track, sending
the appropriate 487?
route:
--
#CANCEL processing
if (is_method("CANCEL") || is_method("ACK")) {
if (t_check_trans()) {
setflag(1);
if(!t_relay()) {
sl_reply_error();
}
}
exit;
};
ngrep output, comments starting with #:
--
U 91.XXX.XXX.80:5060 -> 91.ZZZ.ZZZ.9:5060 CANCEL
sip:6--------@91.ZZZ.ZZZ.9 SIP/2.0
Via: SIP/2.0/UDP
91.XXX.XXX.80:5060;branch=z9hG4bK1e22091bbd2d0a9b9e0f8de6553d2c27
From:
"349--------"<sip:user1@91.ZZZ.ZZZ.9>;tag=XG6525p2-b915854d-1373157639
To: <sip:6--------@91.ZZZ.ZZZ.9>
Call -ID: 6C8F-F261-374702698-E353C7B05C17-0006(a)91.XXX.XXX.80
CSeq: 10 CANCEL
Max-Forwards: 70
User-Agent: XAVi/XG6525p2-1.6.7
Content-Length: 0
U 91.ZZZ.ZZZ.9:5060 -> 91.XXX.XXX.80:5060 SIP/2.0 200 canceling
Via: SIP/2.0/UDP
91.XXX.XXX.80:5060;branch=z9hG4bK1e22091bbd2d0a9b9e0f8de6553d2c27
From:
"349--------"<sip:user1@91.ZZZ.ZZZ.9>;tag=XG6525p2-b915854d-1373157639
To: <sip:6--------@91.ZZZ.ZZZ.9>;tag=bbd8f31c58bc6a3266ec5509a254d55b-cb96
Call-ID: 6C8F-F261-374702698-E353C7B05C17-0006(a)91.XXX.XXX.80
CSeq: 10 CANCEL
Server: Kamailio (1.4.1-notls (i386/linux))
Content-Length: 0
# 487 Request Terminated from 91.ZZZ.ZZZ.9 to 91.XXX.XXX.80 ??
U 91.ZZZ.ZZZ.9:5060 -> 212.YYY.YYY.84:5060 CANCEL
sip:346--------@212.YYY.YYY.84 SIP/2.0
Via: SIP/2.0/UDP 91.ZZZ.ZZZ.9;branch=z9hG4bKe214.208c19e6.0
From:
"349--------"<sip:user1@91.ZZZ.ZZZ.9>;tag=XG6525p2-b915854d-1373157639
Call-ID: 6C8F-F261-374702698-E353C7B05C17-0006(a)91.XXX.XXX.80
To: <sip:6--------@91.ZZZ.ZZZ.9>
CSeq: 10 CANCEL
Max-Forwards: 70
User-Agent: Kamailio (1.4.1-notls (i386/linux))
Content-Length: 0
U 212.YYY.YYY.84:5060 -> 91.ZZZ.ZZZ.9:5060 SIP/2.0 200 OK
Via: SIP/2.0/UDP 91.ZZZ.ZZZ.9:5060;branch=z9hG4bKe214.208c19e6.0
To: <sip:6--------@91.ZZZ.ZZZ.9>;tag=a439d513
From: "349--------"
<sip:user1@91.ZZZ.ZZZ.9>;tag=XG6525p2-b915854d-1373157639
Call-ID: 6C8F-F261-374702698-E353C7B05C17-0006(a)91.XXX.XXX.80
CSeq: 10 CANCEL
User-Agent: ENS2.2.122-IS2
Content-Length: 0
# 487 Request Terminated from 212.YYY.YYY.84 to 91.ZZZ.ZZZ.9 ??
Best Regards,
Magnus