t2u is a udp tunnel for tcp based protocol.
It's useful for using tcp for nat traversal while STUN with udp is available.
download libevent2 from http://libevent.org/ , then extract in dir c.
using nmake to build libt2u.lib and test_t2u.exe
cd t2u\c
nmake -f Makefile.nmake
download libevent2 from http://libevent.org/ , make and make install it.
using make to build libt2u.a and test_t2u
cd t2u/c
make -f Makefile.linux