On Dec 15 18:48, yesin wrote: > looks like a problem with SO_REUSEADDR exists in CYGWIN for all > windows with support for "Enhanced socket security" (see > http://msdn.microsoft.com/en-us/library/ms740621(VS.85).aspx > <http://www.google.com/url?sa=D&q=http://msdn.microsoft.com/en-us/library/ms740621%28VS.85%29.aspx&usg=AFQjCNF9bXOmPTwYjiP37Xdq2xRAYNXfWg>) > > > i'am trying to start multimple simultaneous UDP listeners for a > multicast packets on a single machine (reuse same address and port > with SO_REUSEADDR) > [...] > with cygwin environment i can't run multiple listerers... bind error: > Address already in use!
Thanks for the report and especially thanks for the testcase. There is code in Cygwin which skips calls to setsockopt(SO_REUSEADDR) on systems supporting enhanced socket security. That's necessary to emulate socket re-binding behaviour more closely to POSIX behaviour. The problem was that this should have been only called for TCP sockets but Cygwin accidentally called it for UDP sockets as well. I fixed that in CVS. Thanks again, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
