[asterisk-bugs] [Asterisk 0017192]: Phone keeps ringing when hangup between 'NOTIFY' and 'Status: 180 Ringing'

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=17192 
====================================================================== 
Reported By:                ronaldderksen
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   17192
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.0.26 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.0 
SVN Revision (number only!): 257592 
Request Review:              
====================================================================== 
Date Submitted:             2010-04-16 04:49 CDT
Last Modified:              2010-04-19 15:20 CDT
====================================================================== 
Summary:                    Phone keeps ringing when hangup between 'NOTIFY' and
'Status: 180 Ringing'
Description: 
When I call my aastra SIP phone and hangup before the aastra phone sents
back the 'Status: 180 Ringing' the phone keeps ringing 'forever'
This is what I see with tshark when I hangup right after I dialed the
phone.

  0.000000 192.168.12.4 -> 192.168.12.100 SIP Request: NOTIFY
sip:400 at 192.168.12.100:5060;transport=udp
  0.044154 192.168.12.100 -> 192.168.12.4 SIP Status: 200 OK
  0.351948 192.168.12.4 -> 192.168.12.100 SIP/SDP Request: INVITE
sip:400 at 192.168.12.100:5060;transport=udp, with session description
  0.355715 192.168.12.4 -> 192.168.12.100 SIP Request: NOTIFY
sip:400 at 192.168.12.100:5060;transport=udp
  0.525349 192.168.12.100 -> 192.168.12.4 SIP Status: 180 Ringing
  0.529074 192.168.12.100 -> 192.168.12.4 SIP Status: 200 OK

The aastra phone sents the 'Status: 180 Ringing' message after 529ms. That
is a a big window. When I first play a message with 'Playback' application
and the caller decides to hangup, the window of 529ms is too much. There is
a big change people hangup in that 529ms.

I can also reproduce this with a polycom phone. But with polucom it is
harder because it sents the 'Status: 180 Ringing' quicker (186 ms) I cannot
reproduce this problem with a linksys phone. Linksys phone sents the
'Status: 180 Ringing' in 20ms.

A normal Dial -> ringing -> hangup looks like this (with aastra phone):

  0.000000 192.168.12.4 -> 192.168.12.100 SIP Request: NOTIFY
sip:400 at 192.168.12.100:5060;transport=udp
  0.047770 192.168.12.100 -> 192.168.12.4 SIP Status: 200 OK
  0.331322 192.168.12.4 -> 192.168.12.100 SIP/SDP Request: INVITE
sip:400 at 192.168.12.100:5060;transport=udp, with session description
  0.464797 192.168.12.100 -> 192.168.12.4 SIP Status: 180 Ringing
  2.822520 192.168.12.4 -> 192.168.12.100 SIP Request: NOTIFY
sip:400 at 192.168.12.100:5060;transport=udp
  2.823327 192.168.12.4 -> 192.168.12.100 SIP Request: CANCEL
sip:400 at 192.168.12.100:5060;transport=udp
  2.983367 192.168.12.100 -> 192.168.12.4 SIP Status: 200 OK
  2.986478 192.168.12.100 -> 192.168.12.4 SIP Status: 487 Request
Terminated

So When I hangup after the phone ringed ones, I see that asterisk sents a
'CANCEL' message. I think this 'CANCEL' message also need to be sent when
asterisk did not yet receive the 'Status: 180 Ringing' message.

======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0017096 C keeps ringing when hanging A and B af...
====================================================================== 

---------------------------------------------------------------------- 
 (0120610) ronaldderksen (reporter) - 2010-04-19 15:20
 https://issues.asterisk.org/view.php?id=17192#c120610 
---------------------------------------------------------------------- 
It is somehow related to aastra phones. An aastra phone does not answer
very quckly with the 'Ringing' status. Is there a minimum time to respond
on INVITE? 
I was not able to reproduce this problem wit a linksys phone. Linksys
phone sent the 'Ringing' much faster to asterisk. I measured this with
tshark.

My guess is that asterisk does NOT sent a CANCEL message after INVITE if
it did not yet receive a 'Ringing' message back. Why CANCEL a phone that is
not ringing? In some cases people can hangup milliseconds after the INVITE.
This can happen if you do a playback command followed by a Dial command. If
people decide to hangup after hearing the playback, they might hangup
during the Dial command and thus milliseconds after INVITE. That is my
guess of what is happening. In the first 6 lines of thshark output, there
is NO CANCEL message sent to the phone. I hangup right after hearing a
playback(beep). I used beep for easy timing when to hangup. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-04-19 15:20 ronaldderksen  Note Added: 0120610                          
======================================================================