[p2p-hackers] Re: Getting started with UPnP on Win32

[Scott C. Best]

David:

 	Any mention in there how it handles multiple WinXP PC's
on the LAN in contention for the same port-forwarding adjustment?

cheers,
Scott

> Ah, I'll answer my own question:
>
> It appears WinXP has another API in the Platform SDK named "Network
> Address Translation".  It's a wrapper over the UPnP NAT functionality
> (thus you don't touch the UPnP API directly).  Rather, you use these
> basic steps:
>
> 1) Create a UPnPNAT COM object and get its IUPnPNAT interface
> 2) Call IUPnPNAT::get_StaticPortMappingCollection( )
> 3) IStaticPortMappingCollection::Add( ) to add configure a port forward
>
> At least, that's the theory.  A C++ file showing it in action is here:
>
> http://cvs.sourceforge.net/viewcvs.py/dcplusplus/dcplusplus/windows/UPnP.cpp?rev=1.3
>
> Not sure how well the whole thing works and it only appears to work
> under XP, but it's a place to start.
>
> -david
<snip>