This is the code for chatting. Run `broadcaster2.rb` (if you want a nickname) and `receiver.rb` in different terminal windows to join the fun!

broadcaster.rb

require 'socket'
chat_socket = UDPSocket.new

# tell the OS we mean to broadcast
chat_socket.setsockopt(:SOCKET, :SO_BROADCAST, 1)

print "# Sending messages to everyone port 31337\n< "
while message = gets
  chat_socket.send message, 0, '255.255.255.255', 31337
  print "< "
end

broadcaster2.rb

require 'socket'

puts "What's your nick name?"
nick_name = gets.chomp

chat_socket = UDPSocket.new

# tell the OS we mean to broadcast
chat_socket.setsockopt(:SOCKET, :SO_BROADCAST, 1)

print "# Sending messages to everyone port 31337\n< "
while message = gets
  chat_socket.send "<#{nick_name}> #{message}", 0, '255.255.255.255', 31337
  print "< "
end

receiver.rb

require 'socket'
chat_socket = UDPSocket.new

# Listen on all IP addresses on port 31337
chat_socket.bind "", 31337

puts "# Now listening on port 31337"
while message = chat_socket.gets.chomp
  puts "> " + message
end