Hi!
I have a phone (Mitel 6930) that does not send an Expire-header but "expire" in Contact during REGISTER:
Session Initiation Protocol (REGISTER)
Request-Line: REGISTER sip:pbx.example.com SIP/2.0 Message Header Via: SIP/2.0/TLS 192.168.6.16:5061;branch=xxxxxxxxxxxxxxxx;rport Route: <sip:pbx.example.com;lr=lr;transport=tls> Max-Forwards: 70 From: "Example" <sip:121212_6666@pbx.example.com>;tag=b0cec92c3e To: "Example" <sip:121212_6666@pbx.example.com> Call-ID: aaaaaaaaaaaaaaaaa CSeq: 1190442896 REGISTER Accept-Language: de Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, OPTIONS, UPDATE,PRACK, SUBSCRIBE, INFO, PUBLISH Allow-Events: talk, hold, conference, LocalModeStatus Contact: "Example" <sip:121212_6666@192.0.2.1:62336
;+sip.instance="urn:uuid:00000000-0000-1000-8000-08000FB888F5";expires=300
Supported: path, gruu User-Agent: Mitel 6930/5.0.0.2041 Aastra-Line: 1 Aastra-Mac: AAAAAAAAAAAA Content-Length: 0
This results in successful register, kamailio forwards REGISTER to asterisk (endpoint registered) and immediatly kamailio sends a new REGISTER with Expire set to 0 to asterisk:
Session Initiation Protocol (REGISTER)
Request-Line: REGISTER sip:192.168.99.112:5060 SIP/2.0 Message Header Via: SIP/2.0/UDP 192.168.99.111:5060;branch=z9hG4bK9f9e.599cf243000000000000000000000000.0 To: sip:121212_6666@192.168.99.112 From: <sip:121212_6666@192.168.99.112
;tag=7e4f6993bfbf831f6b016fea6683cdca-b98a
CSeq: 10 REGISTER Call-ID: 2bc5fd1061b31723-1350@192.168.99.111 Max-Forwards: 70 Content-Length: 0 User-Agent: kamailio (5.1.6 (x86_64/linux)) Contact: <sip:121212_6666@192.168.99.111:5060> Expires: 0
The phone is then unregistered - the phone also shows "no service". It looks like Kamailio generates this message on it's own (and I don't know why).
I am still learning to implement kamailio as proxy. Reading the docs, I would expect Kamailio to automatically eval the correct parameter:
If the processed message contains neither Expires HFs nor expires contact parameters, this value will be used for newly created usrloc records.
[1]
What did I miss? Phones which use the Expire-header are working fine.
Kind regards Kevin
[1] default_expires - http://www.kamailio.org/docs/modules/5.2.x/modules/registrar.html