[asterisk-dev] bweschke: branch 1.4 r150816 - /branches/1.4/main/manager.c
russell at digium.com
Sun Oct 19 20:39:29 CDT 2008
On Oct 17, 2008, at 8:42 PM, SVN commits to the Digium repositories
> Author: bweschke
> Date: Fri Oct 17 20:42:23 2008
> New Revision: 150816
> URL: http://svn.digium.com/view/asterisk?view=rev&rev=150816
> Using the GetVar handler in AMI is potentially dangerous (insta-
> crash [tm]) when you use a dialplan function that requires a channel
> and then you don't provide one or provide an invalid one in the
> Channel: parameter. We'll handle this situation exactly the same way
> it was handled in pbx.c back on r61766. We'll create a bo
> gus channel for the function call and destroy it when we're done. If
> we have trouble allocating the bogus channel then we're not going to
> try executing the function call at all and run the risk of crashing.
I do not have a direct problem with this change, because it is the
correct thing to do if dialplan functions are allowed to assume a
channel is present.
However, I'd like to propose that for the sake of performance, we
handle this the opposite way. How about we make it so that dialplan
functions are _not_ allowed to assume that a channel will be present.
For any function that _must_ have a channel to do something useful
(like the CHANNEL() function!), just make it return an error if no
channel is provided.
Senior Software Engineer
Open Source Team Lead
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