[SR-Users] t_check_trans failed on ACK

Thu Apr 28 17:19:23 CEST 2022

If that is the case what is the best way to handle ACK from kamailio?

I am using it as proxy server only and for caching registrations.

On Thu, Apr 28, 2022 at 8:27 PM Henning Westerholt <hw at gilawa.com> wrote:

> Hello,
>
>
>
> the ACK to a 200 OK is not part of the (previous) SIP INVITE transaction.
> Please refer to the standard for more details:
> https://datatracker.ietf.org/doc/html/rfc3261#section-17
>
>
>
> Cheers,
>
>
>
> Henning
>
>
>
> --
>
> Henning Westerholt – https://skalatan.de/blog/
>
> Kamailio services – https://gilawa.com
>
>
>
> *From:* sr-users <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Linux
> Vince
> *Sent:* Thursday, April 28, 2022 12:36 PM
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* [SR-Users] t_check_trans failed on ACK
>
>
>
> I am using Kamailio as registrar and proxy for underlying asterisk server.
>
>
>
> I am able to call but ACK on 200 OK respond from client phones are not
> validating transaction and thus not relaying correctly.
>
>
>
> Below are my Invites and 200 OK responses.
>
>
>
> Invite from Asterisk to Kamailio
>
>
>
> INVITE sip:31313004 at rigel.com:5060;user=phone SIP/2.0
>
> Via: SIP/2.0/UDP 65.20.69.72:5060
> ;rport;branch=z9hG4bKd6ffff9d46ceb899c245ece204e51c87
>
> From: "R31313005 N31313005" <sip:31313005 at 65.20.69.72:5060;user=phone
> >;tag=GR52RWG346-34
>
> To: "31313004 at rigel.com" <sip:31313004 at rigel.com:5060>
>
> Call-ID: 1558172022-144148450000000029280449 at 65.20.69.72
>
> CSeq: 1 INVITE
>
> Contact: <sip:65.20.69.72:5060>
>
> max-forwards: 70
>
> Allow: PUBLISH, SUBSCRIBE, MESSAGE, ACK, NOTIFY, OPTIONS, REFER, INFO,
> BYE, CANCEL, INVITE
>
> Content-Type: application/sdp
>
> Content-Length:   228
>
>
>
> v=0
>
> o=Clarent 155866 155867 IN IP4 65.20.69.72
>
> s=Clarent CallManager
>
> c=IN IP4 65.20.69.72
>
> t=0 0
>
> m=audio 45168 RTP/AVP 0 8 101
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:8 PCMA/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-15
>
>
>
>
>
> Invite from Kamailio to Phone
>
>
>
> INVITE sip:31313004 at 65.20.67.118;lhst=180.211.119.50:25759;lm=midreg
> SIP/2.0
>
> Record-Route: <sip:65.20.67.118;lr;ftag=GR52RWG346-34>
>
> Via: SIP/2.0/UDP
> 65.20.67.118;branch=z9hG4bK6cc3.dad7580d3e28f55cbb749dbb82f0c9eb.0
>
> Via: SIP/2.0/UDP 65.20.69.72:5060
> ;received=65.20.69.72;rport=5060;branch=z9hG4bKd6ffff9d46ceb899c245ece204e51c87
>
> From: "R31313005 N31313005" <sip:31313005 at 65.20.69.72:5060;user=phone
> >;tag=GR52RWG346-34
>
> To: "31313004 at rigel.com" <sip:31313004 at rigel.com:5060>
>
> Call-ID: 1558172022-144148450000000029280449 at 65.20.69.72
>
> CSeq: 1 INVITE
>
> Contact: <sip:65.20.69.72:5060>
>
> max-forwards: 69
>
> Allow: PUBLISH, SUBSCRIBE, MESSAGE, ACK, NOTIFY, OPTIONS, REFER, INFO,
> BYE, CANCEL, INVITE
>
> Content-Type: application/sdp
>
> Content-Length:   228
>
>
>
> v=0
>
> o=Clarent 155866 155867 IN IP4 65.20.69.72
>
> s=Clarent CallManager
>
> c=IN IP4 65.20.69.72
>
> t=0 0
>
> m=audio 45168 RTP/AVP 0 8 101
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:8 PCMA/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-15
>
>
>
>
>
>
>
> 200 OK from Phone to Kamailio
>
>
>
> SIP/2.0 200 OK
>
> Via: SIP/2.0/UDP
> 65.20.67.118;received=65.20.67.118;branch=z9hG4bK6cc3.dad7580d3e28f55cbb749dbb82f0c9eb.0
>
> Via: SIP/2.0/UDP 65.20.69.72:5060
> ;rport=5060;received=65.20.69.72;branch=z9hG4bKd6ffff9d46ceb899c245ece204e51c87
>
> Record-Route: <sip:65.20.67.118;lr;ftag=GR52RWG346-34>
>
> Call-ID: 1558172022-144148450000000029280449 at 65.20.69.72
>
> From: "R31313005 N31313005" <sip:31313005 at 65.20.69.72
> ;user=phone>;tag=GR52RWG346-34
>
> To: "31313004 at rigel.com" <sip:31313004 at rigel.com
> >;tag=4ecc1f21f1544fd783965f27ff6d95d2
>
> CSeq: 1 INVITE
>
> Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY,
> REFER, MESSAGE, OPTIONS
>
> Contact: <sip:31313004 at 180.211.119.50:57935;ob>
>
> Supported: replaces, 100rel, timer, norefersub
>
> Content-Type: application/sdp
>
> Content-Length:   322
>
>
>
> v=0
>
> o=- 3860150297 3860150298 IN IP4 180.211.119.50
>
> s=pjmedia
>
> b=AS:84
>
> t=0 0
>
> a=X-nat:0
>
> m=audio 4016 RTP/AVP 0 101
>
> c=IN IP4 180.211.119.50
>
> b=TIAS:64000
>
> a=rtcp:4017 IN IP4 180.211.119.50
>
> a=sendrecv
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-16
>
> a=ssrc:1461220511 cname:3b657c275d2a43f6
>
>
>
>
>
>
>
> 200 OK from kamailio to asterisk
>
>
>
> SIP/2.0 200 OK
>
> Via: SIP/2.0/UDP 65.20.69.72:5060
> ;rport=5060;received=65.20.69.72;branch=z9hG4bKd6ffff9d46ceb899c245ece204e51c87
>
> Record-Route: <sip:65.20.67.118;lr;ftag=GR52RWG346-34>
>
> Call-ID: 1558172022-144148450000000029280449 at 65.20.69.72
>
> From: "R31313005 N31313005" <sip:31313005 at 65.20.69.72
> ;user=phone>;tag=GR52RWG346-34
>
> To: "31313004 at rigel.com" <sip:31313004 at rigel.com
> >;tag=4ecc1f21f1544fd783965f27ff6d95d2
>
> CSeq: 1 INVITE
>
> Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY,
> REFER, MESSAGE, OPTIONS
>
> Contact: <sip:31313004 at 180.211.119.50:57935;ob>
>
> Supported: replaces, 100rel, timer, norefersub
>
> Content-Type: application/sdp
>
> Content-Length:   322
>
>
>
> v=0
>
> o=- 3860150297 3860150298 IN IP4 180.211.119.50
>
> s=pjmedia
>
> b=AS:84
>
> t=0 0
>
> a=X-nat:0
>
> m=audio 4016 RTP/AVP 0 101
>
> c=IN IP4 180.211.119.50
>
> b=TIAS:64000
>
> a=rtcp:4017 IN IP4 180.211.119.50
>
> a=sendrecv
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-16
>
> a=ssrc:1461220511 cname:3b657c275d2a43f6
>
>
>
> ACK from phone to Kamailio
>
>
>
> ACK sip:31313004 at 180.211.119.50:57935;ob SIP/2.0
>
> Via: SIP/2.0/UDP 65.20.69.72:5060
> ;rport;branch=z9hG4bK111270de2729ade9e048afa0f9fbb8df
>
> Route: <sip:65.20.67.118;lr;ftag=GR52RWG346-34>
>
> From: "R31313005 N31313005" <sip:31313005 at 65.20.69.72:5060;user=phone
> >;tag=GR52RWG346-34
>
> To: "31313004 at rigel.com" <sip:31313004 at rigel.com
> >;tag=4ecc1f21f1544fd783965f27ff6d95d2
>
> Call-ID: 1558172022-144148450000000029280449 at 65.20.69.72
>
> CSeq: 1 ACK
>
> Contact: <sip:65.20.69.72:5060>
>
> max-forwards: 70
>
> Allow: PUBLISH, SUBSCRIBE, MESSAGE, ACK, NOTIFY, OPTIONS, REFER, INFO,
> BYE, CANCEL, INVITE
>
>
>
>
>
> This ACK is failing on transaction check and not routing correctly to
> phone.
>
>
>
> Any help?
>
>
>
> Thanks
>
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