#!/usr/bin/env ruby
#
# $Id: icmp-spew 9 2008-03-02 04:44:32Z warchild $
#
# Given a source and destination IP address
# and a data size, spew all 65536 possible ICMP 

require 'rubygems'
require '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 = 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 = ICMP.new

  n.l5 = IPv4.new(Misc.randstring(20))
  n.l5.version = 4
  n.l5.hlen = 21
  protos = %w(6 17 1)
  n.l5.protocol = protos[rand(4)].to_i
  n.l5.payload = Misc.randstring(20)

  srand Time.now.usec
  n.l4.type = rand 256
  n.l4.code = rand 256 
  n.sendpacket
  tick
end
  
@it = 0
@ticks = %w( / - \\ | )

n = Racket.new
n.iface = "eth0"

puts "Spewing..."
while (true)
  rand_icmp(n)
end

# vim: set ts=2 et sw=2: