Arduino wiznet5100 and remote ip trougth http service

Hello. i need to capture the remote ip from visitor/user (http client).
I have tested the 2 solutions in the forum but don't work.
My project use:

Hardware:
Arduino mega
wiznet 5100
some other electronic shields...

Software:
Tinywebserver
Arduino 1.5.5 r2

Tnx verry much

Post the code you tried to get the remote ip or links to that code. The "Tinywebserver" may be so small it doesn't include the low level functions required to use the mods.