[asterisk-dev] [Code Review] 3900: Bridging: Fix an issue where bridge features can be interrupted by actions that set the UNBRIDGE soft hangup flag on a channel.

[rmudgett]

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Ship it!


Ship It!

- rmudgett


On Aug. 11, 2014, 5:06 p.m., Jonathan Rose wrote:
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> (Updated Aug. 11, 2014, 5:06 p.m.)
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> 
> Review request for Asterisk Developers, Matt Jordan and rmudgett.
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> Bugs: ASTERISK-24027
>     https://issues.asterisk.org/jira/browse/ASTERISK-24027
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> Repository: Asterisk
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> Description
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> An odd little issue that can interrupt features and even hangup calls entirely in an unwanted fashion.
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> Reproduction is fairly trivial, simply have a dynamic bridge feature that plays audio or executes an AGI or something that just generally takes a little while and is sensitive to hangups.
> Call into an extension that puts that feature on the channel and call another device.
> Execute the feature.
> While the feature is running, start mixmonitor on the channel executing the feature and watch as the feature is prematurely terminated and the call itself is hung up entirely.
> 
> Having the flag to re-evaluate the status of the bridge be a hangup flag seems to have been a little off point and trying to have everything that pays attention to hangups specifically ignore it seems a little wacky, so instead I've pulled AST_SOFTHANGUP_UNBRIDGE out of the soft hangup flags and turned it into its own thing.
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> Diffs
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>   /branches/12/main/pbx.c 420558 
>   /branches/12/main/framehook.c 420558 
>   /branches/12/main/channel_internal_api.c 420558 
>   /branches/12/main/channel.c 420558 
>   /branches/12/main/bridge_channel.c 420558 
>   /branches/12/main/bridge_after.c 420558 
>   /branches/12/include/asterisk/channel.h 420558 
>   /branches/12/apps/app_stack.c 420558 
>   /branches/12/apps/app_mixmonitor.c 420558 
>   /branches/12/apps/app_chanspy.c 420558 
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> Diff: https://reviewboard.asterisk.org/r/3900/diff/
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> Testing
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> Performed the above reproduction steps with the patch and the call no longer hangs up and the feature completes normally.  Mixmonitor captures all the audio as well.
> Made sure native RTP bridges would still be re-evaluated and become simple bridges when a hook such as mixmonitor is placed on one of the bridged channels.
> Ran through chan_sip and chan_pjsip testsuite tests to make sure the patch didn't introduce any failures.
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> Thanks,
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> Jonathan Rose
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>

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