[SR-Users] Kamailio not updating CSeq after uac_auth() for ACK
Terry Tailor
terry at fullduplex.co.uk
Fri Dec 18 09:19:00 CET 2020
Hi Daniel,
I have tested CANCEL and ACK cases with nighty Release it is working fine.
Thank you
Regards
Terry
On Thu, Dec 17, 2020 at 6:59 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:
> Hello,
>
> can you try with latest git branch 5.4? I just pushed a commit to handle
> this case.
>
> You have to compile from sources, like:
>
> * https://kamailio.org/docs/tutorials/5.4.x/kamailio-install-guide-git/
>
> Debian packages from branch 5.4 are also built over night:
>
> * http://deb.kamailio.org/#dev54
>
> Cheers,
> Daniel
> On 17.12.20 13:05, Terry Tailor wrote:
>
> Hi, I have updated Kamailio to 5.4 still there is an issue with Cseq of
> cancel in case of cancel it is not increasing cSeq
> here are details
> 1. proxy a sends invite with CSeq: 102 INVITE and proxy b route it to
> asterisk with CSeq: 102 INVITE
> 2. asterisk sends 401 Unauthorized with CSeq: 102 INVITE and proxy b sends
> ACK with CSeq: 102 ACK
> 3. proxy b sends invite with CSeq: 103 INVITE and asterisk sends 100
> Trying and 180 Ringing with CSeq: 103 INVITE
> 4. proxy b relay to proxy a 180 Ringing with CSeq: 102 INVITE
> 5. proxy a send CANCEL with CSeq: 102 CANCEL and proxy b sends CANCEL with
> CSeq: 102 CANCEL to asterisk
> 6. Now asterisk is sending 481 Call leg/transaction does not exist
>
> uname -a: Linux example.com 4.15.0-124-generic #127-Ubuntu SMP Fri Nov 6
> 10:54:43 UTC 2020 x86_64 GNU/Linux
> kamailio -v: version: kamailio 5.4.3 (x86_64/linux)
> flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
> F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
> USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST,
> HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
> ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024,
> BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> id: unknown
> compiled with gcc 6.3.0
>
>
> sip logs:
>
>
> 2020/12/17 11:42:32.289934 proxy-a.com:5060 -> 10.0.14.118:5060
> INVITE sip:123456 at proxy-a.com SIP/2.0
> Record-Route: <sip:proxy-a.com;lr>
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Contact: <sip:54321 at did.com:5060>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> User-Agent: VB-Proxy
> CSeq: 102 INVITE
> User-Agent: did
> Date: Thu, 17 Dec 2020 11:42:32 GMT
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Remote-Party-ID: "54321" <sip:54321 at did.com
> >;party=calling;privacy=off;screen=no
> Content-Type: application/sdp
> Content-Length: 889
>
> 2020/12/17 11:42:32.290569 10.0.14.118:5060 -> proxy-a.com:5060
> SIP/2.0 100 trying -- your call is important to us
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1;rport=5060
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 INVITE
> Server: kamailio (5.4.3 (x86_64/linux))
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:32.291036 10.0.14.118:5060 -> 10.0.14.118:6000
> INVITE sip:123456 at proxy-a.com SIP/2.0
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Contact: <sip:54321 at did.com:5060>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> User-Agent: VB-Proxy
> CSeq: 102 INVITE
> User-Agent: did
> Date: Thu, 17 Dec 2020 11:42:32 GMT
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Remote-Party-ID: "54321" <sip:54321 at did.com
> >;party=calling;privacy=off;screen=no
> Content-Type: application/sdp
> Content-Length: 889
>
>
>
> 2020/12/17 11:42:32.308279 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 401 Unauthorized
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0;received=10.0.14.118;rport=5060
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as152bd976
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> WWW-Authenticate: Digest algorithm=MD5, realm="sip1.comms.kuflink.com",
> nonce="3673a540"
> Content-Length: 0
>
>
> 2020/12/17 11:42:32.308770 10.0.14.118:5060 -> 10.0.14.118:6000
> ACK sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as152bd976
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 ACK
> Content-Length: 0
>
>
> 2020/12/17 11:42:32.309610 10.0.14.118:5060 -> 10.0.14.118:6000
> INVITE sip:123456 at proxy-a.com SIP/2.0
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Contact: <sip:54321 at did.com:5060>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> User-Agent: VB-Proxy
> CSeq: 103 INVITE
> User-Agent: did
> Date: Thu, 17 Dec 2020 11:42:32 GMT
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Remote-Party-ID: "54321" <sip:54321 at did.com
> >;party=calling;privacy=off;screen=no
> Content-Type: application/sdp
> Content-Length: 889
> Authorization: Digest username="did095499", realm="sip1.comms.kuflink.com",
> nonce="3673a540", uri="sip:123456 at proxy-a.com",
> response="24d8949f18f4f2650913ce3feaa78380", algorithm=MD5
>
>
>
>
> 2020/12/17 11:42:32.333610 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 100 Trying
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 103 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Contact: <sip:123456 at 10.0.14.118:6000>
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:34.276380 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 180 Ringing
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 103 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Contact: <sip:123456 at 10.0.14.118:6000>
> Content-Length: 0
>
>
> 2020/12/17 11:42:34.277337 10.0.14.118:5060 -> proxy-a.com:5060
> SIP/2.0 180 Ringing
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:38.113181 proxy-a.com:5060 -> 10.0.14.118:5060
> CANCEL sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Content-Length: 0
>
>
> 2020/12/17 11:42:38.113918 10.0.14.118:5060 -> 10.0.14.118:6000
> CANCEL sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Content-Length: 0
> P-K-CSeq-Auth: 103
>
>
>
> 2020/12/17 11:42:38.114114 10.0.14.118:5060 -> proxy-a.com:5060
> SIP/2.0 200 canceling
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=a74459175e9494c7e23ffeb306461015-0f770312
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Server: kamailio (5.4.3 (x86_64/linux))
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:38.116456 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 481 Call leg/transaction does not exist
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1;received=10.0.14.118;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as24deed39
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:54.554350 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 183 Session Progress
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> Record-Route: <sip:sip.comms.kuflink.com;lr;did=baf.7bf1>
> Record-Route: <sip:proxy-a.com;lr>
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 103 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Contact: <sip:123456 at 10.0.14.118:6000>
> Content-Type: application/sdp
> Require: timer
> Content-Length: 292
>
>
>
> 2020/12/17 11:42:54.554978 10.0.14.118:5060 -> 10.0.14.118:6000
> CANCEL sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Content-Length: 0
> P-K-CSeq-Auth: 103
>
>
>
> 2020/12/17 11:42:54.557082 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 481 Call leg/transaction does not exist
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1;received=10.0.14.118;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as5eee0295
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 CANCEL
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:59.617825 10.0.14.118:6000 -> 10.0.14.118:5060
> SIP/2.0 603 Declined
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 103 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:59.618423 10.0.14.118:5060 -> 10.0.14.118:6000
> ACK sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP sip.comms.kuflink.com:5060
> ;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 103 ACK
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:59.618944 10.0.14.118:5060 -> proxy-a.com:5060
> SIP/2.0 603 Declined
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Via: SIP/2.0/UDP did.com:5060;received=did.com
> ;branch=z9hG4bK3756a567;rport=5060
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 INVITE
> Server: did
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
> PUBLISH, MESSAGE
> Supported: replaces, timer
> Session-Expires: 1800;refresher=uas
> Content-Length: 0
>
>
>
> 2020/12/17 11:42:59.620074 proxy-a.com:5060 -> 10.0.14.118:5060
> ACK sip:123456 at proxy-a.com SIP/2.0
> Via: SIP/2.0/UDP proxy-a.com:5060
> ;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
> Max-Forwards: 70
> From: "54321" <sip:54321 at did.com>;tag=as02b3f892
> To: <sip:123456 at proxy-a.com>;tag=as12b14194
> Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
> CSeq: 102 ACK
> Content-Length: 0
>
> On Thu, Dec 17, 2020 at 4:52 PM George Diamantopoulos <
> georgediam at gmail.com> wrote:
>
>> Not sure if this is related, but I've also run into issues with
>> track_cseq_updates:
>> https://www.mail-archive.com/sr-users@lists.kamailio.org/msg12362.html
>>
>> More specifically, kamailio won't process the 100 Trying to an
>> Cseq-bumped INVITE it generated
>> itself with uac_auth() when track_cseq_updates is on.
>>
>> This implementation appears to be a little too fragile for the time
>> being....
>>
>> BR,
>> George
>>
>> On Thu, 17 Dec 2020 at 12:29, Terry Tailor <terry at fullduplex.co.uk>
>> wrote:
>>
>>> Hi, Here is setup details
>>> Kamailio Proxy a <-----> Kamailio Proxy b <-----> Asterisk
>>> Kamailio proxy b auth based on IP Kamailio Proxy a
>>> 1. Kamailio proxy sends an Invite request to Kamailio proxy b with CSeq:
>>> 102 INVITE
>>> 2. Kamailio proxy b check again IP auth and sends invite request to
>>> asterisk with CSeq: 102 INVITE
>>> 4 asterisk response with 401 Unauthorized with CSeq: 102
>>> 5. Kamailio proxy b sends ACK request with CSeq: 102 ACK
>>> 6. Kamailio proxy b sends INVITE request with CSeq: 103 INVITE
>>> 7. Asterisk sends 100 trying and 180 ringing with CSeq: 103 INVITE
>>> 8. Kamailio proxy b relay 180 ringing with CSeq: 102 INVITE
>>> 9. Asterisk send 200 Ok with CSeq: 103 INVITE and proxy b relay it to
>>> proxy a with CSeq: 102 INVITE
>>> 10. Now Proxy a send an ACK with CSeq: 102 ACK and proxy b relay ACK to
>>> asterisk with CSeq: 102 ACK
>>>
>>> Now asterisk is retransmitting 200 ok with CSeq: 103 INVITE and proxy a
>>> is sending ACK with Cseq: 102 ACK
>>>
>>> Same happing in case of 487 Request Terminated
>>>
>>> Here is my config
>>>
>>> modparam("dialog", "default_timeout", 10800) # 3h
>>> modparam("dialog", "dlg_match_mode", 1)
>>> modparam("dialog", "db_mode", 0)
>>> modparam("dialog", "send_bye", 1)
>>> modparam("dialog", "track_cseq_updates", 1)
>>> modparam("uac","auth_username_avp","$avp(auser)")
>>> modparam("uac","auth_password_avp","$avp(apass)")
>>> modparam("uac","auth_realm_avp","$avp(arealm)")
>>>
>>> modparam("tm", "failure_reply_mode", 3)
>>> # default retransmission timeout: 3 sec
>>> modparam("tm", "fr_timer", 2000)
>>> modparam("tm", "retr_timer1", 250)
>>> modparam("tm", "retr_timer2", 500)
>>> # default invite retransmission timeout after 1xx: 60 sec
>>> modparam("tm", "fr_inv_timer", 60000)
>>> modparam("tm", "reparse_on_dns_failover", 0)
>>>
>>>
>>>
>>> if (is_method("INVITE") && !has_totag()) {
>>> dlg_setflag(FLD_RTPPROXY);
>>> dlg_manage();
>>> }
>>> route(RELAY);
>>>
>>>
>>>
>>>
>>> route[RELAY] {
>>>
>>> # At this point all checks are passed
>>> t_on_branch("MANAGE_BRANCH");
>>> t_on_reply("MANAGE_REPLY");
>>> t_on_failure("MANAGE_FAILURE");
>>> if(is_method("INVITE") && isflagset(FLT_FROMDID)) {
>>> #$fd = "sip.comms.kuflink.com";
>>> t_on_failure("RELAY_AUTH");
>>> }
>>>
>>> if (!t_relay()) {
>>> send_reply("500", "Cannot relay to $du/$ru");
>>> }
>>> exit;
>>> }
>>>
>>> failure_route[RELAY_AUTH] {
>>> t_on_branch("MANAGE_BRANCH");
>>> t_on_reply("MANAGE_REPLY");
>>> if (t_is_canceled()) {
>>> exit;
>>> }
>>> if(t_check_status("401|407")) {
>>> #$fd = "sip.comms.kuflink.com";
>>> $avp(auser) = "DID_UA_USERNAME";
>>> $avp(apass) = "DID_UA_PASSWORD";
>>> if (uac_auth()) {
>>> t_relay();
>>> }
>>> exit;
>>> }
>>> }
>>>
>>>
>>> route[WITHINDLG] {
>>> if (!has_totag()) {
>>> return;
>>> }
>>>
>>> if (is_method("BYE")) {
>>> rtpengine_delete();
>>> }
>>>
>>> # sequential request withing a dialog should
>>> # take the path determined by record-routing
>>> if (loose_route()) {
>>> route(DLGURI);
>>> if (is_method("ACK")) {
>>> # ACK is forwarded statelessly
>>> route(NATMANAGE);
>>> } else if (is_method("NOTIFY")) {
>>> # Add Record-Route for in-dialog NOTIFY as per RFC 6665.
>>> record_route();
>>> }
>>> route(RELAY);
>>> exit;
>>> }
>>>
>>> if (is_method("SUBSCRIBE") && uri == myself) {
>>> # in-dialog subscribe requests
>>> route(PRESENCE);
>>> exit;
>>> }
>>> if (is_method("ACK") ) {
>>> if (t_check_trans()) {
>>> # no loose-route, but stateful ACK;
>>> # must be an ACK after a 487
>>> # or e.g. 404 from upstream server
>>> route(RELAY);
>>> exit;
>>> } else {
>>> # ACK without matching transaction ... ignore and discard
>>> exit;
>>> }
>>> }
>>> send_reply("404","Not here");
>>> exit;
>>> }
>>>
>>>
>>> kamailio -v
>>> version: kamailio 5.3.7 (x86_64/linux)
>>> flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
>>> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
>>> F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
>>> USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST,
>>> HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
>>> ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE
>>> 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
>>> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>>> id: unknown
>>> compiled with gcc 6.3.0
>>>
>>>
>>> uname -a
>>> Linux example.com 4.15.0-124-generic #127-Ubuntu SMP Fri Nov 6 10:54:43
>>> UTC 2020 x86_64 GNU/Linux
>>>
>>>
>>>
>>> SIP logs
>>> 2020/12/17 10:08:18.483907 proxy-a.com:5060 -> 10.0.14.118:5060
>>> INVITE sip:123456 at proxy-a.com SIP/2.0
>>> Record-Route: <sip:proxy-a.com;lr>
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> User-Agent: ProxyA
>>> CSeq: 102 INVITE
>>> User-Agent: proxy
>>> Date: Thu, 17 Dec 2020 10:08:18 GMT
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>> >;party=calling;privacy=off;screen=no
>>> Content-Type: application/sdp
>>> Content-Length: 885
>>>
>>>
>>>
>>> 2020/12/17 10:08:18.485063 10.0.14.118:5060 -> proxy-a.com:5060
>>> SIP/2.0 100 trying -- your call is important to us
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1;rport=5060
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: kamailio (5.3.7 (x86_64/linux))
>>> Content-Length: 0
>>>
>>>
>>> 2020/12/17 10:08:18.485576 10.0.14.118:5060 -> 10.0.14.118:6000
>>> INVITE sip:123456 at proxy-a.com SIP/2.0
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> User-Agent: ProxyA
>>> CSeq: 102 INVITE
>>> User-Agent: proxy
>>> Date: Thu, 17 Dec 2020 10:08:18 GMT
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>> >;party=calling;privacy=off;screen=no
>>> Content-Type: application/sdp
>>> Content-Length: 885
>>>
>>>
>>>
>>> 2020/12/17 10:08:18.622867 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 401 Unauthorized
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as4107645c
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> WWW-Authenticate: Digest algorithm=MD5, realm="sip1.comms.kuflink.com",
>>> nonce="11139d33"
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:18.624034 10.0.14.118:5060 -> 10.0.14.118:6000
>>> ACK sip:123456 at proxy-a.com SIP/2.0
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as4107645c
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 ACK
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:18.625557 10.0.14.118:5060 -> 10.0.14.118:6000
>>> INVITE sip:123456 at proxy-a.com SIP/2.0
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> User-Agent: ProxyA
>>> CSeq: 103 INVITE
>>> User-Agent: proxy
>>> Date: Thu, 17 Dec 2020 10:08:18 GMT
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>> >;party=calling;privacy=off;screen=no
>>> Content-Type: application/sdp
>>> Content-Length: 885
>>> Authorization: Digest username="xxxxx", realm="xxxx", nonce="11139d33",
>>> uri="sip:123456 at proxy-a.com", response="qwewqeqwe", algorithm=MD5
>>>
>>>
>>>
>>> 2020/12/17 10:08:18.779483 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 100 Trying
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 103 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000>
>>> Content-Length: 0
>>>
>>>
>>>
>>>
>>> 2020/12/17 10:08:20.937756 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 180 Ringing
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 103 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000>
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:20.938593 10.0.14.118:5060 -> proxy-a.com:5060
>>> SIP/2.0 180 Ringing
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.075814 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 103 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 296
>>>
>>>
>>> 2020/12/17 10:08:22.077049 10.0.14.118:5060 -> proxy-a.com:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 316
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.103365 proxy-a.com:5060 -> 10.0.14.118:5060
>>> ACK
>>> sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1;alias=109.72.216.251~5060~1
>>> SIP/2.0
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;branch=z9hG4bKbe6d.0fc1940efc770391762d7d67094c24f8.0
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK2a5fae72;rport=5060
>>> Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 ACK
>>> User-Agent: proxy
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.103877 10.0.14.118:5060 -> 10.0.14.118:6000
>>> ACK sip:123456 at 10.0.14.118:6000;alias=109.72.216.251~5060~1 SIP/2.0
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.79f351d031912aae585207d2f26d5650.0
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.0fc1940efc770391762d7d67094c24f8.0
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK2a5fae72;rport=5060
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 ACK
>>> User-Agent: proxy
>>> Content-Length: 0
>>> P-K-CSeq-Refresh: 103
>>>
>>>
>>> 2020/12/17 10:08:22.575533 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 103 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 296
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.576777 10.0.14.118:5060 -> proxy-a.com:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 316
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.581649 proxy-a.com:5060 -> 10.0.14.118:5060
>>> ACK
>>> sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1;alias=109.72.216.251~5060~1
>>> SIP/2.0
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;branch=z9hG4bKbe6d.b9c7eeccd4cd7b44f05b173308dbaf0a.0
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK219933f6;rport=5060
>>> Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 ACK
>>> User-Agent: proxy
>>> Content-Length: 0
>>>
>>>
>>>
>>> 2020/12/17 10:08:22.582313 10.0.14.118:5060 -> 10.0.14.118:6000
>>> ACK sip:123456 at 10.0.14.118:6000;alias=109.72.216.251~5060~1 SIP/2.0
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.33626b5695ad4648ba393bc62bed6a8c.0
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.b9c7eeccd4cd7b44f05b173308dbaf0a.0
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK219933f6;rport=5060
>>> Max-Forwards: 70
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Contact: <sip:7654321 at did.com:5060>
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 ACK
>>> User-Agent: proxy
>>> Content-Length: 0
>>> P-K-CSeq-Refresh: 103
>>>
>>>
>>> 2020/12/17 10:08:23.575828 10.0.14.118:6000 -> 10.0.14.118:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-b.com:5060
>>> ;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 103 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 296
>>>
>>>
>>> 2020/12/17 10:08:23.577863 10.0.14.118:5060 -> proxy-a.com:5060
>>> SIP/2.0 200 OK
>>> Via: SIP/2.0/UDP proxy-a.com:5060
>>> ;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>> Via: SIP/2.0/UDP did.com:5060;received=did.com
>>> ;branch=z9hG4bK45f94ed9;rport=5060
>>> Record-Route: <sip:proxy-b.com;lr;did=d18.7a9>
>>> Record-Route: <sip:proxy-a.com;lr>
>>> From: "7654321" <sip:7654321 at did.com>;tag=as55c522e1
>>> To: <sip:123456 at proxy-a.com>;tag=as147bfa3e
>>> Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>> CSeq: 102 INVITE
>>> Server: proxy
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH, MESSAGE
>>> Supported: replaces, timer
>>> Session-Expires: 1800;refresher=uas
>>> Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>> Content-Type: application/sdp
>>> Require: timer
>>> Content-Length: 316
>>>
>>>
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>
> _______________________________________________
> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Funding: https://www.paypal.me/dcmierla
>
>
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