[asterisk-dev] [Code Review] 4257: chan_pjsip: Race condition between channel answer and bridge setup when using direct media

[Mark Michelson]

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Ship it!


Ship It!

- Mark Michelson


On Dec. 11, 2014, 8:14 p.m., Kevin Harwell wrote:
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> (Updated Dec. 11, 2014, 8:14 p.m.)
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> Review request for Asterisk Developers.
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> Bugs: ASTERISK-24563
>     https://issues.asterisk.org/jira/browse/ASTERISK-24563
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> Repository: Asterisk
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> Description
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> When direct media is enabled and a pjsip channel is answered a race would occur between the handling of the answer and bridge setup. Sometimes the media negotiation would take place after the native bridge was setup.  This resulted in a NULL media address, which in turn resulted in Asterisk using its address as the remote media address when sending a reinvite.  This patch makes the chan_pjsip answer handler synchronous thus alleviating the race condition (the bridge won't start setting things up until after it returns).
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> Diffs
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>   branches/13/channels/chan_pjsip.c 429386 
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> Diff: https://reviewboard.asterisk.org/r/4257/diff/
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> Testing
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> Made around 100 phones calls with and did not issue occur again.
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> Thanks,
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> Kevin Harwell
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