[asterisk-bugs] [Asterisk 0017641]: [patch] reset visible_indication after call answering

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17641 
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Reported By:                klaus3000
Assigned To:                russell
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Project:                    Asterisk
Issue ID:                   17641
Category:                   Applications/app_dial
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     closed
Target Version:             1.6.2.12
Asterisk Version:           SVN 
JIRA:                       SWP-1850 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2010-07-14 07:17 CDT
Last Modified:              2010-08-10 12:47 CDT
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Summary:                    [patch] reset visible_indication after call
answering
Description: 
Currently, after a call is established (outgoing channel is answered), a
visible_indication on the incoming channel is not reset.

This can cause problems when the channel is later used by services which
check for visible_indication and trigger indication.

Consider the following case:

exten => a,1,Answer()
exten => a,2,Dial(SIP/a)
exten => b,1,Answer()
exten => b,2,Dial(SIP/b)
exten => c,1,Answer()
exten => c,2,Dial(SIP/c)

A calls B. B calls C. B refers A to C (attended transfer).

When A calls B, channel A is answered (UP). When the outgoing channel (B1)
receives 180 ringing, a ringback tone will be played back to A (as A is
already UP) and the visible_indication is set to ringing (3). 

Later, when channel A is masquereded into channel B2 (B->C), the visible
indication is still set, and Asterisk will falsely play a ringbacl tone to
A as the attended transfer checks for visible_indication and triggers
ast_indicate().

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Relationships       ID      Summary
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has duplicate       0017400 Writeformat Slin instead Alaw after att...
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 (0125766) svnbot (reporter) - 2010-08-10 12:47
 https://issues.asterisk.org/view.php?id=17641#c125766 
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Repository: asterisk
Revision: 281567

_U  branches/1.6.2/
U   branches/1.6.2/apps/app_dial.c

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r281567 | russell | 2010-08-10 12:47:11 -0500 (Tue, 10 Aug 2010) | 15
lines

Merged revisions 281566 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r281566 | russell | 2010-08-10 12:45:45 -0500 (Tue, 10 Aug 2010) | 8
lines
  
  Reset visible indication after answer.
  
  (closes issue https://issues.asterisk.org/view.php?id=17641)
  Reported by: klaus3000
  Patches:
        ast1.6.2.9-app_dial-visible_indication.patch.txt uploaded by
klaus3000 (license 65)
  Tested by: schmidts
........

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http://svn.digium.com/view/asterisk?view=rev&revision=281567 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-08-10 12:47 svnbot         Checkin                                      
2010-08-10 12:47 svnbot         Note Added: 0125766                          
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