in reply to How to send Broadcast message

Try perldoc IO::Socket. Here's a little example:
use IO::Socket;
$socket = IO::Socket::INET->new
(
    PeerAddr => '1.1.1.1',
    PeerPort => #<open port e.g. 80>,
    Proto => "tcp",
    Type => SOCK_STREAM
) or die "Could Not open port";
print $socket "Server message\n";
close($socket);

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Now, how you interpret messages on the other side is up to you. You can write a server program that mirrors this example above, you can use something like tcpdump with the '-x' option for hexidecimal encoding and decode the message, or you may already have something.

Replies are listed 'Best First'.
Re: Re: How to send Broadcast message
by ralijani (Acolyte) on Jun 25, 2003 at 12:31 UTC
    sory but i want to send message to all microsoft and linux client without any client application on my client 
    use IO::Socket::Multicast;

  # create a new UDP socket ready to read datagrams on port 1100
  my $s = IO::Socket::Multicast->new(LocalPort=>1100);

  # Add a multicast group
  $s->mcast_add('225.0.1.1');

  # Add a multicast group to eth0 device
  $s->mcast_add('225.0.0.2','eth0');

  # now receive some multicast data
  $s->recv($data,1024);

  # Drop a multicast group
  $s->mcast_drop('225.0.0.1');

  # Set outgoing interface to eth0
  $s->mcast_if('eth0');

  # Set time to live on outgoing multicast packets
  $s->mcast_ttl(10);

  # Turn off loopbacking
  $s->mcast_loopback(0);

  # Multicast a message to group 225.0.0.1
  $s->mcast_send('hello world!','225.0.0.1:1200');
  $s->mcast_set('225.0.0.2:1200');
  $s->mcast_send('hello again!');

    [download]

    update (broquaint): added <code> tags

[reply]
[d/l]
      A 'client' is a 'client application' - you can broadcast messages wherever you like, but unless something's listening and acting on those messages, they're not a lot of good. You can't just send a message to a machine and expect it to magically do something...what were you expecting, exactly? mcast_send(PopupWindow=>1,PlaySound=>"ding.wav")? Anything that causes the client to take action must aleady be running on the client machine.

      Two paragraphs down fom the IO::Socket::Multicast synopsis you've pasted in there, it explains how to write a multicast client that will listen to your multicast server. That should get you started, if this is what you need.

      Cheers, Ben.

[reply]

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