Review Board 1.7.16

SIP Session-Expires: Set timer to correctly expire at (~2/3) of the expiry interval when not the refresher.

Review Request #2488 - Created May 1, 2013 and submitted

Alec Davis
1.8 to trunk
RFC 4028 Section 10

	if the side not performing refreshes does not receive a
	session refresh request before the session expiration, it SHOULD send
	a BYE to terminate the session, slightly before the session
	expiration.  The minimum of 32 seconds and one third of the session
	interval is RECOMMENDED.

asterisk to phone.
Phone's Session-Expires: 120

[Apr 30 22:49:20] NOTICE[12686][C-00000000]: chan_sip.c:29006 start_session_timer: Session timer started: 104 - 50a7397219b8f47e192f74e81f3b125e@192.168.x.y:5060 88000ms
<<<<<  pull ethernet on phone >>
<<<<<  88 seconds later       >>
[Apr 30 22:50:48] WARNING[12686]: chan_sip.c:29042 proc_session_timer: Session-Timer expired - 50a7397219b8f47e192f74e81f3b125e@192.168.x.y:5060

Phone to Asterisk, No Session-Expires
Asterisk's Session-Expires: 300
[Apr 30 23:47:02] NOTICE[12857][C-00000001]: chan_sip.c:29006 start_session_timer: Session timer started: 99 - 7160947918a9977c@ 150000ms
Review request changed
Updated (May 7, 2013, 8:38 a.m.)
  • changed from pending to submitted
Committed in revision 387797 runs on a server provided by Digium, Inc. and uses bandwidth donated to the open source Asterisk community by API Digital Communications in Huntsville, AL USA.
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