[asterisk-dev] [Code Review] Complete DTMF digit when bridge is broken.

[rmudgett]

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https://reviewboard.asterisk.org/r/2169/
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Review request for Asterisk Developers.


Summary
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Using the AMI redirect action or ChannelRedirect application on a bridged call to transfer a channel can result in a stuck DTMF digit on the channel sending the digit.
Initial scenario that resulted in a stuck DTMF digit on a channel:
1) A is bridged with B (It doesn't matter who called whom)
2) B is sending a DTMF digit to A.
3) An AMI redirect action or the ChannelRedirect application redirects A to another channel or dialplan extension.
4) A will be stuck sending DTMF

Another scenario that could result in a stuck DTMF digit on a channel is the following:
1) A calls B
2) B is sending a DTMF digit to A
3) An AMI hangup action is done to B.
4) A will be stuck sending DTMF if it is setup to execute dialplan after the bridge exits.  (Dial g option)


This addresses bug ASTERISK-20492.
    https://issues.asterisk.org/jira/browse/ASTERISK-20492


Diffs
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  /branches/1.8/include/asterisk/channel.h 375354 
  /branches/1.8/include/asterisk/features.h 375354 
  /branches/1.8/main/channel.c 375354 
  /branches/1.8/main/features.c 375354 

Diff: https://reviewboard.asterisk.org/r/2169/diff


Testing
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Both scenarios get the simulated DTMF end digit.
For DAHDI channels, the initial scenario would result in A hearing ringback even though C answered and C could not hear anything from A.


Thanks,

rmudgett

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