[p2p-hackers] Getting started with UPnP on Win32

[David Barrett]

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

David Barrett wrote:
> Can you recommend a good resource for getting started with Universal 
> Plug-n-Play on Win32 for NAT traversal purposes?
> 
> I see the various UPnP APIs (Control Point, Device Host, etc.) in the 
> MSDN docs, but I don't see specific mention of how to apply them to NAT 
> configuration.  Rather, they seem to give an overall approach for 
> configuring an arbitrary UPnP device, with details on specific devices 
> left as "an exercise to the reader".
> 
> Can you give me the 30-second overview of COM objects and function calls 
> I need to use?  Or can you refer me to a decent overview of the subject? 
>   If nothing else, do you know of some sample code that shows 
> configuring a NAT device to allow incoming data?
> 
> Thanks!
> 
> -david
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