#!/usr/bin/env ruby
#
# $Id: icmp-spew 174 2010-08-21 22:26:52Z jhart $
#
# Given a source and destination IP address
# and a data size, spew all 65536 possible ICMP 
require 'rubygems'
require 'racket'
include Racket
if (ARGV.size != 3) 
  puts "Usage #{$0} <src_ip> <dst_ip> <icmp data size>"
  exit!
end
def tick 
  @it += 1
  @it = 0 if @it >= @ticks.size
  print "\r#{@ticks[@it]}"
  STDOUT.flush
end
def rand_icmp(n)
  n.l3 = L3::IPv4.new
  n.l3.src_ip= ARGV[0]
  n.l3.dst_ip = ARGV[1]
  n.l3.version = 0x4
  n.l3.hlen = 0x5
  n.l3.protocol = 0x1
  n.l3.flags = 0x0
  n.l3.foffset = 0x0
  n.l4 = L4::ICMP.new(Misc.randstring(20))
  n.sendpacket
  tick
end
@it = 0
@ticks = %w( / - \\ | )
n = Racket::Racket.new
n.iface = "eth0"
puts "Spewing..."
while (true)
  rand_icmp(n)
end
# vim: set ts=2 et sw=2: