package IO::Socket::Multicast

The IO::Socket::Multicast module adds methods to IO::Socket that
enable you to manipulate multicast groups.  With this module (and an
operating system that supports multicasting), you will be able to
receive incoming multicast packets and generate your own outgoing
multicast packets.  This module is compatible with MBONE.

SYNOPSIS:

  use IO::Socket::Multicast;

  # create a new UDP socket ready to read datagrams on port 1100
  my $s = IO::Socket::INET->new(Proto=>'udp',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->ttl(10);

  # Turn off loopbacking
  $s->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!');

AUTHOR:

Lincoln Stein, lstein@cshl.org


