http://bugs.winehq.org/show_bug.cgi?id=31994
--- Comment #16 from Bruno Jesus 00cpxxx@gmail.com 2012-10-23 09:08:52 CDT --- (In reply to comment #15)
You have got to be joking, Windows will really allow you to send a broadcast packet without a permissions check? This has got to only be when you send interface-specific broadcasts (though that's still ridiculous).
Maybe windows checks the destination IP and automagically set SO_BROADCAST and then disables before the function return. I have used UDP broadcast for a long time in VB6 before finding out what was SO_BROADCAST.