L2 Broadcast on EC2-VPC

#!/usr/bin/ruby
require 'rubygems'
require 'packetfu'

dev = ARGV[0]
mac=`ip link show #{dev} | awk '/ether/ {print $2}'`
ARGV.shift
dests = ARGV

cap = PacketFu::Capture.new(
          :timeout => 4000,
          :iface => dev, :start => true,
          :filter => "ether src #{mac} and ether[0] & 1 = 1")

loop do
  cap.stream.each do |pkt|
    frame = PacketFu::IPPacket.parse(pkt)
    i = 0
    dests.each do |dest|
      frame.eth_daddr = dest
      frame.ip_header.ip_id = frame.ip_header.ip_id + i
      frame.ip_header.ip_sum = frame.ip_header.ip_calc_sum()
      frame.to_w(dev)
      i = i + 1
    end
  end
end