here is an ngrep of the working one

U 2018/04/19 05:31:31.112392 a.b.c.d:6060 -> a.b.c.d:5090
INVITE sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Record-Route: <sip:a.b.c.d:6060;lr;ftag=d75e236e;nat=yes>.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
Max-Forwards: 70.
Contact: <sip:kelvin@w.x.y.z:34439;transport=UDP;alias=w.x.y.z~34439~1>.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
P-Called-Identity: 408.
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE.
Content-Type: application/sdp.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="3861e6cdaf8a44cce98721e3c8dda428",uri="sip:408@a.b.c.d:6060;transport=UDP",response="b7a365bd35650736c45d2048d924ea0b",cnonce="492da67adf4a5853f0aa012c2fa5a757",nc=00000001,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Allow-Events: presence, kpml, talk.
Content-Length: 255.
P-Called-Party-ID: <sip:408@a.b.c.d:6060;transport=UDP>.
.
v=0.
o=Zoiper 0 0 IN IP4 a.b.c.d.
s=Zoiper.
c=IN IP4 a.b.c.d.
t=0 0.
m=audio 19592 RTP/AVP 3 101 0 8.
a=rtpmap:3 GSM/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=sendrecv.
a=rtcp:19593.


U 2018/04/19 05:31:31.180853 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 INVITE.
Server: kamailio (5.1.2 (x86_64/linux)).
Content-Length: 0.
.


U 2018/04/19 05:31:35.134023 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
Record-Route: <sip:a.b.c.d:5090;lr=on;ftag=d75e236e;did=208.b272;ReIn=true>,<sip:a.b.c.d:6060;lr;ftag=d75e236e;nat=yes>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=r5eFv3QrQD71H.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 INVITE.
Contact: <sip:e.f.g.h;did=2082.1aaa8341>.
User-Agent: SIP.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 222.
.
v=0.
o=UAC 23521 12211 IN IP4 23.29.25.68.
s=SIP Media Capabilities.
c=IN IP4 23.29.25.74.
t=0 0.
m=audio 25694 RTP/AVP 0 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=maxptime:20.


U 2018/04/19 05:31:35.134763 a.b.c.d:6060 -> w.x.y.z:34439
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
Record-Route: <sip:a.b.c.d:5090;lr=on;ftag=d75e236e;did=208.b272;ReIn=true>,<sip:a.b.c.d:6060;lr;ftag=d75e236e;nat=yes>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=r5eFv3QrQD71H.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 INVITE.
Contact: <sip:e.f.g.h;did=2082.1aaa8341>.
User-Agent: SIP.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 250.
.
v=0.
o=UAC 23521 12211 IN IP4 a.b.c.d.
s=SIP Media Capabilities.
c=IN IP4 a.b.c.d.
t=0 0.
m=audio 19610 RTP/AVP 0 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=maxptime:20.
a=sendrecv.
a=rtcp:19611.


U 2018/04/19 05:31:36.054719 w.x.y.z:34439 -> a.b.c.d:6060
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:34439;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 CANCEL.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="3861e6cdaf8a44cce98721e3c8dda428",uri="sip:408@a.b.c.d:6060;transport=UDP",response="8cace32bdff1bc61974d61c8a56238dd",cnonce="030abc48cc862c50cf8bd3d0e61844f3",nc=00000002,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Content-Length: 0.
.


U 2018/04/19 05:31:36.055183 a.b.c.d:6060 -> a.b.c.d:5090
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 CANCEL.
Content-Length: 0.
.


U 2018/04/19 05:31:36.055259 a.b.c.d:6060 -> w.x.y.z:34439
SIP/2.0 200 canceling.
Via: SIP/2.0/UDP w.x.y.z:34439;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439;received=w.x.y.z.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=f072ba6a4747058fd2933a88d05e31a8-77fc.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 CANCEL.
Server: Sipsurge Overlord/1.0.0.
Content-Length: 0.
.


U 2018/04/19 05:31:36.055443 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 200 canceling.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=886d45488eeb4821dd4d3b48f2349838-53f2.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 CANCEL.
Server: kamailio (5.1.2 (x86_64/linux)).
Content-Length: 0.
.


U 2018/04/19 05:31:36.059120 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 487 Request Terminated.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=886d45488eeb4821dd4d3b48f2349838-53f2.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 INVITE.
Server: kamailio (5.1.2 (x86_64/linux)).
Content-Length: 0.
.


U 2018/04/19 05:31:36.059306 a.b.c.d:6060 -> a.b.c.d:5090
ACK sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bK638a.ebce2b6669d2c54149bcc613c89d6510.1.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=886d45488eeb4821dd4d3b48f2349838-53f2.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 ACK.
Content-Length: 0.
.


U 2018/04/19 05:31:36.060030 a.b.c.d:6060 -> w.x.y.z:34439
SIP/2.0 487 Request Terminated.
Via: SIP/2.0/UDP w.x.y.z:34439;received=w.x.y.z;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport=34439.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=886d45488eeb4821dd4d3b48f2349838-53f2.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 INVITE.
Server: kamailio (5.1.2 (x86_64/linux)).
Content-Length: 0.
.


U 2018/04/19 05:31:36.262168 w.x.y.z:34439 -> a.b.c.d:6060
ACK sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:34439;branch=z9hG4bK-524287-1---4c57b6fa8ff74676;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=886d45488eeb4821dd4d3b48f2349838-53f2.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=d75e236e.
Call-ID: 7O090_g-Ndh_I22Zi5ZOhQ...
CSeq: 2 ACK.
Content-Length: 0.
.



and then ngrep of the non-matching one

U 2018/04/19 04:39:43.137832 a.b.c.d:6060 -> a.b.c.d:5090
INVITE sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Record-Route: <sip:a.b.c.d:6060;lr;ftag=88ab0030;nat=yes>.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bKcd06.5537814be9e2ae1fe1f60daf1fb39e03.1.
Via: SIP/2.0/UDP w.x.y.z:44308;received=w.x.y.z;branch=z9hG4bK-524287-1---bac673a0af203e10;rport=44308.
Max-Forwards: 70.
Contact: <sip:kelvin@w.x.y.z:44308;transport=UDP;alias=w.x.y.z~44308~1>.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
P-Called-Identity: 408.
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE.
Content-Type: application/sdp.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="815682331c7aaddbff9a28548d875652",uri="sip:408@a.b.c.d:6060;transport=UDP",response="c5147959ff30db5eb9d38fb7ec796a68",cnonce="3496cd726af47c79a4725f83f74c7d98",nc=00000001,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Allow-Events: presence, kpml, talk.
Content-Length: 255.
P-Called-Party-ID: <sip:408@a.b.c.d:6060;transport=UDP>.
.
v=0.
o=Zoiper 0 0 IN IP4 a.b.c.d.
s=Zoiper.
c=IN IP4 a.b.c.d.
t=0 0.
m=audio 19554 RTP/AVP 3 101 0 8.
a=rtpmap:3 GSM/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=sendrecv.
a=rtcp:19555.


U 2018/04/19 04:39:43.202106 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bKcd06.5537814be9e2ae1fe1f60daf1fb39e03.1.
Via: SIP/2.0/UDP w.x.y.z:44308;received=w.x.y.z;branch=z9hG4bK-524287-1---bac673a0af203e10;rport=44308.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 INVITE.
Server: kamailio (5.1.2 (x86_64/linux)).
Content-Length: 0.
.


U 2018/04/19 04:39:47.400412 a.b.c.d:5090 -> a.b.c.d:6060
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP a.b.c.d:6060;branch=z9hG4bKcd06.5537814be9e2ae1fe1f60daf1fb39e03.1.
Via: SIP/2.0/UDP w.x.y.z:44308;received=w.x.y.z;branch=z9hG4bK-524287-1---bac673a0af203e10;rport=44308.
Record-Route: <sip:a.b.c.d:5090;lr=on;ftag=88ab0030;did=8a.f2c2;ReIn=true>,<sip:a.b.c.d:6060;lr;ftag=88ab0030;nat=yes>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=cp1SQvQ6SNSaH.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 INVITE.
Contact: <sip:e.f.g.h;did=8a06.2a2c6204>.
User-Agent: SIP.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 221.
.
v=0.
o=UAC 7006 20280 IN IP4 23.29.21.84.
s=SIP Media Capabilities.
c=IN IP4 23.29.21.91.
t=0 0.
m=audio 27104 RTP/AVP 0 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=maxptime:20.


U 2018/04/19 04:39:47.401210 a.b.c.d:6060 -> w.x.y.z:44308
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP w.x.y.z:44308;received=w.x.y.z;branch=z9hG4bK-524287-1---bac673a0af203e10;rport=44308.
Record-Route: <sip:a.b.c.d:5090;lr=on;ftag=88ab0030;did=8a.f2c2;ReIn=true>,<sip:a.b.c.d:6060;lr;ftag=88ab0030;nat=yes>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
To: <sip:408@a.b.c.d:6060;transport=UDP>;tag=cp1SQvQ6SNSaH.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 INVITE.
Contact: <sip:e.f.g.h;did=8a06.2a2c6204>.
User-Agent: SIP.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 249.
.
v=0.
o=UAC 7006 20280 IN IP4 a.b.c.d.
s=SIP Media Capabilities.
c=IN IP4 a.b.c.d.
t=0 0.
m=audio 19576 RTP/AVP 0 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=maxptime:20.
a=sendrecv.
a=rtcp:19577.


U 2018/04/19 04:39:49.552641 w.x.y.z:44308 -> a.b.c.d:6060
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:44308;branch=z9hG4bK-524287-1---bac673a0af203e10;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 CANCEL.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="815682331c7aaddbff9a28548d875652",uri="sip:408@a.b.c.d:6060;transport=UDP",response="3e161bd546cdd5e8876cb48ffdfaeea0",cnonce="d1ca4c1b6e427869e795f7da457b3eef",nc=00000002,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Content-Length: 0.
.


U 2018/04/19 04:39:50.050153 w.x.y.z:44308 -> a.b.c.d:6060
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:44308;branch=z9hG4bK-524287-1---bac673a0af203e10;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 CANCEL.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="815682331c7aaddbff9a28548d875652",uri="sip:408@a.b.c.d:6060;transport=UDP",response="3e161bd546cdd5e8876cb48ffdfaeea0",cnonce="d1ca4c1b6e427869e795f7da457b3eef",nc=00000002,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Content-Length: 0.
.


U 2018/04/19 04:39:51.048945 w.x.y.z:44308 -> a.b.c.d:6060
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:44308;branch=z9hG4bK-524287-1---bac673a0af203e10;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 CANCEL.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="815682331c7aaddbff9a28548d875652",uri="sip:408@a.b.c.d:6060;transport=UDP",response="3e161bd546cdd5e8876cb48ffdfaeea0",cnonce="d1ca4c1b6e427869e795f7da457b3eef",nc=00000002,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Content-Length: 0.
.


U 2018/04/19 04:39:53.049231 w.x.y.z:44308 -> a.b.c.d:6060
CANCEL sip:408@a.b.c.d:6060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP w.x.y.z:44308;branch=z9hG4bK-524287-1---bac673a0af203e10;rport.
Max-Forwards: 70.
To: <sip:408@a.b.c.d:6060;transport=UDP>.
From: <sip:kelvin@a.b.c.d:6060;transport=UDP>;tag=88ab0030.
Call-ID: qXQ2PEtXgehz4CQYo2ryLg...
CSeq: 2 CANCEL.
Proxy-Authorization: Digest username="kelvin",realm="domain.com",nonce="815682331c7aaddbff9a28548d875652",uri="sip:408@a.b.c.d:6060;transport=UDP",response="3e161bd546cdd5e8876cb48ffdfaeea0",cnonce="d1ca4c1b6e427869e795f7da457b3eef",nc=00000002,qop=auth,algorithm=MD5.
User-Agent: Zoiper rv2.8.87-mod.
Content-Length: 0.
.




Kelvin Chua

On Wed, Apr 18, 2018 at 11:22 PM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

do you have a pcap with all messages for such call (invite, replies, cancel)? It is important to see if the transaction matching elements are properly set.

In general, the rule for cancel is to be sent in the same way (with the same elements) as the invite, because cancel is not a standalone transaction, it must match the associated invite one.

Cheers,
Daniel


On 18.04.18 16:59, Kelvin Chua wrote:
after couple of tests, it is still hit and miss, sometimes it matches, sometimes it does not.

On Wed, Apr 18, 2018, 6:47 PM Kelvin Chua <kelchy@gmail.com> wrote:
thanks alex, will test this out further but looks good at the moment
any idea why it is not matching when RURI has the port if i only use t_check_trans() and relay?

Kelvin Chua

On Wed, Apr 18, 2018 at 3:44 PM, Alex Balashov <abalashov@evaristesys.com> wrote:
Try this instead:

   route {
      ...

      t_check_trans();

      ...

      if(is_method("CANCEL")) {
         if(!t_relay_cancel())
            sl_send_reply("500", "Internal Server Error");

         exit;
      }
   }

-- Alex

--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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-- 
Daniel-Constantin Mierla
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