#!/usr/bin/env ruby
#
# $Id: dhcp-spew 174 2010-08-21 22:26:52Z jhart $
#
# Send useless DHCP packets
require 'rubygems'
require 'racket'
include Racket
unless (ARGV.size == 2) 
  puts "Usage: #{$0} <srcip> <dstip>"
  exit
end
n = Racket::Racket.new
n.iface = "eth0"
n.layers[3] = L3::IPv4.new
n.layers[3].src_ip = ARGV[0]
n.layers[3].dst_ip = ARGV[1]
n.layers[3].version = 4
n.layers[3].hlen = 0x5 #
n.layers[3].ttl = 44
n.layers[3].protocol = 0x11
n.layers[4] = L4::UDP.new
n.layers[4].src_port = 68
n.layers[4].dst_port = 67
n.layers[5] = L5::BOOTP.new
n.layers[5].type = 1
n.layers[5].id = 0x12345
n.layers[5].yip = "192.168.0.4"
n.layers[5].chaddr = "00:de:ad:ba:be:ff"
#n.layers[5].file = "foobar?"
#n.layers[5].add_option(4, "\x11\x22\x33\x44")
n.layers[5].add_option(53, "\x01")
n.layers[5].fix!
n.layers[4].payload = n.layers[5]
n.layers[4].fix!(n.layers[3].src_ip, n.layers[3].dst_ip)
n.layers[4].payload = ""
f = n.sendpacket
puts "Sent! #{f}"
# vim: set ts=2 et sw=2: