Ruby Wake-On-Lan Script

sample_wol.rb

#!/usr/bin/ruby
require 'socket'
begin
addr = ['<broadcast>', 9]
UDPSock = UDPSocket.new
UDPSock.setsockopt(Socket::SOL_SOCKET, Socket::SO_BROADCAST, true)
data = "\xFF\xFF\xFF\xFF\xFF\xFF"
arr = ARGV[0].split(':')
16.times do |i|
 data<< arr[0].hex.chr+arr[1].hex.chr+arr[2].hex.chr+arr[3].hex.chr+arr[4].hex.chr+arr[5].hex.chr
end
puts("Wake-On-Lan packet sent to MAC address "+ARGV[0])
UDPSock.send(data, 0, addr[0], addr[1])
rescue
  puts("usage: sample_wol.rb <mac-address>")
  puts("       sample_wol.rb 01:02:03:04:05:06")
end