[asterisk-dev] [Code Review] Two new CEL-related fixes

[rmudgett]

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/trunk/include/asterisk/channel.h
<https://reviewboard.asterisk.org/r/1900/#comment11728>

    With these calls, we could complain about a potential channel reference leak if they are different on shutdown!



/trunk/main/channel.c
<https://reviewboard.asterisk.org/r/1900/#comment11727>

    This should be at the end of the destructor.



/trunk/main/channel.c
<https://reviewboard.asterisk.org/r/1900/#comment11724>

    This should be:
    if (ast_channel_linkedid(chan) && !strcmp(...)) {
    }



/trunk/main/channel_internal_api.c
<https://reviewboard.asterisk.org/r/1900/#comment11726>

    This test is not needed.  String field sets are tolerant of NULL values.  They are treated as empty strings.


- rmudgett


On May 21, 2012, 5:57 p.m., Terry Wilson wrote:
> 
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> 
> (Updated May 21, 2012, 5:57 p.m.)
> 
> 
> Review request for Asterisk Developers, Mark Michelson and rmudgett.
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> 
> Summary
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> This patch fixes to situations that could cause the CEL LINKEDID_END event to be missed.
> 
> 1) During a core stop gracefully, modules are unloaded when ast_active_channels == 0. The LINKDEDID_END event fires during the channel destructor. This means that occasionally, the cel_* module will be unloaded before the channel is destroyed. It seemed generally useful to wait until the refcount of all channel == 0 before unloading, so I added a channel counter and used it in the shutdown code.
> 
> 2) During a masquerade, ast_channel_change_linkedid is called. It calls ast_cel_check_retire_linkedid which unrefs the linkedid in the linkedids container in cel.c. It didn't ref the new linkedid. Now it does. I also changed the logic a little, since it used to call ast_channel_linkedid_set() even when it hadn't changed (or was blank, which should be verboten).
> 
> (this patch is against trunk, but it will go in 1.8+)
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> 
> Diffs
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>   /trunk/include/asterisk/cel.h 367201 
>   /trunk/include/asterisk/channel.h 367201 
>   /trunk/main/asterisk.c 367201 
>   /trunk/main/cel.c 367201 
>   /trunk/main/channel.c 367201 
>   /trunk/main/channel_internal_api.c 367201 
> 
> Diff: https://reviewboard.asterisk.org/r/1900/diff
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> 
> Testing
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> My CEL test passed 100 times or so and transferred calls no longer show an error.
> 
> 
> Thanks,
> 
> Terry
> 
>

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