Hi, thanks for your answer >There definately is as I use it daily. I'm not sure the cause of the >EINVAL, but without a bind, it definately won't work on Windows:
I have tried binding before and after setsockopt(), but the result is the same. I get errno=22 for setsockopt() and errno=125 for bind(). >>I assume you aren't trying to define IP_ADD_MEMBERSHIP yourself? No, but I have tried and I know IP_ADD_MEMBERSHIP equals to 12 in my system. However, I still get errno=22 when I use 12 instead of IP_ADD_MEMBERSHIP. >>Are you sure the interface IP exists and is up with a link on your test system? Yes, I have used in unicast sockets and it works like a charm. Perhaps the problem lies in the struct ip_mreg Multic or in sizeof(Multic) parameters, but I cannot figure out the reason or how to solve it. Victor -- View this message in context: http://www.nabble.com/Problem-Adding-Membership-Multicast-Errno-22-tp22119431p22123866.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
