I read a similar thread that provided an answer that didn't work. I need to find a computer on a LAN. I'll have minimal information, but I can make sure it listens and responds on a socket, so I want to write a program that sends out a broadcast signal on the LAN. The other computer would receive that signal (which would include the IP address) and be able to send a message back saying, "I'm here!"

I can handle the rest, but I don't know how to open a socket and send a broadcast message to the LAN. (I know how to get the subnet and all else, just can't send the broadcast!)

I did find this in another thread:

    use IO::Socket;


     $sock = new IO::Socket::INET (
         PeerAddr => '1.1.1.1',
         PeerPort => '7070',
         Proto => 'tcp',
     );
     die "Could not create socket: $!\n" unless $sock;
     print $sock "Hello there!\n";
     close($sock);

[download]

I did change the IP address to my broadcast address, but could never open that socket. I also tried adding the setting "Type=>SOCK_STREAM" but that didn't help.

How can I use Perl to send a broadcast message to a LAN?

Thanks!

In reply to How Do I Do an IP Broadcast in Perl? by HalNineThousand

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