http://bugs.winehq.org/show_bug.cgi?id=36713
--- Comment #11 from Bruno Jesus 00cpxxx@gmail.com --- Vitaliy's approach is more like the opposite currently implemented in ws2_32 ntop: http://source.winehq.org/git/wine.git/blob/HEAD:/dlls/ws2_32/socket.c#l6864
I'm not sure if that is required or not, tests may help.