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Our software will be installed behind a ifrewall, but we need it to accept incoming connections on a specific port. I figure what I need to do is use port forwarding via uPnP. How do you do this in C/C++ for windows, using Visual Studio 6.0?
Everythign I looked for on the net just wants to discuss the overall architecture fo port forarding, not how to do it in a program.
You can't, unless you can tell the router what to do -- or you have a computer running as a gateway (and your program handles/forwards connections).
Well gee, thats odd because uTorrent does it as well as several other software packages.
http://en.wikipedia.org/wiki/Internet_Gateway_Device
The external links include protocol specifications and implementations.
again, while that is interesting it does not actually give any meaningful examples. I already know what uPnP is, I need code that shows how to implement it in C/C++
Oh but it does, down the bottom of the wiki page it links "Free ANSI C library to control a Universal Plug and Play Internet Gateway Device" @ http://miniupnp.free.fr/
yes perhaps, but when i tried to DL it from that site I kept getting connect errors, so I figured the link was broken.
Well they've also got a mirror... http://miniupnp.tuxfamily.org/