[asterisk-bugs] [Asterisk 0013381]: Wrong branch on CANCEL after SIP INFO in early dialog

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13381 
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Reported By:                atca_pres
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13381
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 140115 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-08-27 07:13 CDT
Last Modified:              2008-09-03 16:05 CDT
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Summary:                    Wrong branch on CANCEL after SIP INFO in early
dialog
Description: 
Scenario :
A Calls Asterisk IVR
IVR answers
A enters B's ext
A pushes a DTMF while B is ringing
A hangs up

in SIP :
A INVITES Asterisk
Asterisk 200OK (IVR)
Asterisk INVITES B
B sends 180 Ringing
A sends SIP INFO 
Asterisk sends SIP INFO to B
A BYEs Asterisk
Asterisk sends CANCEL with wrong branch

The UA cannot match the INVITE to the CANCEL because the CANCEL does not
have the same branch (via header) that the INVITE had. 
B only ack the CANCEL without sending the required 487 to cancel the
INVITE. B Stays ringing forever. (Granted, answering a 481 to the CANCEL
might be the thing to do, but it's only a SHOULD in the RFC)

Attached is the SIP debug + core and verbose 5 (asterisk -Tvvvvvdddddngc |
tee /tmp/verbosedebug.txt) and an ethereal capture for easier reading.
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Relationships       ID      Summary
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related to          0013198 Asterisk sends a [slightly] different b...
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---------------------------------------------------------------------- 
 (0092045) putnopvut (administrator) - 2008-09-03 16:05
 http://bugs.digium.com/view.php?id=13381#c92045 
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It appears that I was checking the wrong variable when attempting to find
what type of SIP request was being sent in the function reqprep(). After
doing some debugging, the code is actually coming to the correct area when
a CANCEL is sent. Please test 13381v2.patch to see if this now fixes the
problem. Thanks! 

Issue History 
Date Modified    Username       Field                    Change               
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2008-09-03 16:05 putnopvut      Note Added: 0092045                          
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