UNIX Sockets - Broadcast address

UNIX Sockets - Broadcast address

[Kay M]

OK I didnt mean connecting in the socket API sense.....erm but when bind 
takes place an error is given. I specified 127.255.255.255 and even 
INADDR_BROADCAST......still same error.

Even tried some demo files from socket book. #

All ok with Linux.


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

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Re: UNIX Sockets - Broadcast address

[Corinna Vinschen]

On Wed, Dec 12, 2001 at 02:36:10AM +0000, Kay M wrote:
> OK I didnt mean connecting in the socket API sense.....erm but when bind 
> takes place an error is given. I specified 127.255.255.255 and even 
> INADDR_BROADCAST......still same error.
> 
> Even tried some demo files from socket book. #
> 
> All ok with Linux.

Did you call setsockopt(..., SO_REUSEADDR, ...) before binding?

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
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