[lwip-devel] [task #7017] Implement DNS client

[Simon Goldschmidt]

Follow-up Comment #49, task #7017 (project lwip):

I'm not familiar with the layout/structs dns uses to address the buffer the
pbuf points to, but I guess coping with a split response will be very
difficult, so we have to copy the response somewhere.

As to the question where to copy it: the stack is a bad idea in my opinion,
as you have to allocate the memory for every thread that will eventually use
dns (create those threads with a bigger stack). Also, 512 bytes is quite big
for a stack on some systems...

A global variable also won't work as multiple threads would access it at the
same time, so what's left is mem_malloc, I suppose... 

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