mswsock:Implement 3 functions by calling through SIO_GET_EXTENSION_FUNCTION_POINTER (try 2)

[Jon Griffiths]

Hi,

Based on Andreys comments, This version gathers the implementation ptrs when AcceptEx is called, using the accepting socket and avoiding calling WSIoctl with a 0 socket. I've added a comment regarding the circumstances under which we may need to modify this approach.

We can't sensibly do any mapping between output buffers and sockets in mswsock - since we'd never know when to free a given mapping, we'd end up leaking them. When AcceptEx is implemented in ws2_32 it will need to own the mapping; it can then free it when the socket is closed.

Cheers
Jon



      
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