UNIX Sockets - Broadcasting - Broadcast address

Corinna Vinschen cygwin@cygwin.com
Tue Dec 11 00:33:00 GMT 2001

On Tue, Dec 11, 2001 at 03:21:13AM +0000, Kay M wrote:
> I have written a client program that connects to the local broadcast address 
> and reads datagrams that are produced by a server. It works on my linux (no 
> internet) machine. But on my PC under CYGWIN the binding of the socket to 
> the Broadcast Address give an error EADDRNOAVAIL.

You're getting the error from the underlying WinSock DLL.  I don't
understand what you're doing, though.  If the server is sending
UDP broadcast messages on your subnet, where do you `connect'???
With UDP you just call readfrom() and wait for a package.  There's
nothing you could connect to or listen on.  And the subnet's
broadcast address isn't a legal address for a machine anyway.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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