Reverse Port Forward using libssh2 on iOS

I'm looking for some example code of a reverse port forward o开发者_开发技巧n iOS using libssh2. Here's a close example:

Example code of libssh2 being used for port forwarding

But I'd like it to be tailored to iOS and objective-C if possible. Straight C is fine too. I'm wary of the socket and FD code, and would rather have a robust solution than the one I'm hacking up. I've tried RTFMing libssh2 for a while, but it ends up being just RTF Code... and I'm not confident enough in my C code to do this networking part.

EDIT: bounty for a working implementation of ssh with port forwarding on iOS 4.3 (e.g. iphone4, ipad2), doesn't need to be libssh2 in specific.

As it turns out, it's fairly straightforward to migrate the putty source http://www.chiark.greenend.org.uk/~sgtatham/putty/ to ios ...