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Re: How to send Broadcast message

by cbro (Pilgrim)
on Jun 25, 2003 at 12:23 UTC ( #268831=note: print w/replies, xml ) Need Help??

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 => '', PeerPort => #<open port e.g. 80>, Proto => "tcp", Type => SOCK_STREAM ) or die "Could Not open port"; print $socket "Server message\n"; close($socket);

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.

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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(''); # Add a multicast group to eth0 device $s->mcast_add('','eth0'); # now receive some multicast data $s->recv($data,1024); # Drop a multicast group $s->mcast_drop(''); # 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 $s->mcast_send('hello world!',''); $s->mcast_set(''); $s->mcast_send('hello again!');

    update (broquaint): added <code> tags

      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.

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