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

[rmudgett]

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/trunk/main/channel.c
<https://reviewboard.asterisk.org/r/1900/#comment11297>

    You do not need to check if the channel has a linkedid.  If it does not have one it has already been complained about when it failed to get the initial linkedid.
    
    With this code, you cannot give a channel a new linkedid if the channel does not already have one.  Therefor, the problem of a channel not having a linkedid cannot be corrected.
    


- rmudgett


On May 7, 2012, 9:10 a.m., Terry Wilson wrote:
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> (Updated May 7, 2012, 9:10 a.m.)
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> 
> 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.
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> 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.
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> 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).
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> (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 365451 
>   /trunk/include/asterisk/channel.h 365451 
>   /trunk/main/asterisk.c 365451 
>   /trunk/main/cel.c 365451 
>   /trunk/main/channel.c 365451 
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> 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.
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> Thanks,
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> Terry
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>

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