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#!/usr/bin/env python
# Copyright (c) 2006, Neville-Neil Consulting
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# Neither the name of Neville-Neil Consulting nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# File: $Id: ping.py,v 1.3 2006/09/05 07:30:56 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description: A simple re-implementatoin of the ping(8) program in
# Python using the Packet Construction Set
from pcs.packets.localhost import *
from pcs.packets.ethernet import *
from pcs.packets.ipv4 import *
from pcs.packets.icmpv4 import *
from pcs import *
def main():
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-c", "--count",
dest="count", default=1,
help="Stop after sending (and recieving) count ECHO_RESPONSE packets..")
parser.add_option("-D", "--dont_fragment",
dest="df", default=False,
help="Set the Don't Fragment bit.")
parser.add_option("-s", "--ip_source",
dest="ip_source", default=None,
help="The IP source address.")
parser.add_option("-d", "--ip_dest",
dest="ip_dest", default=None,
help="The IP destination address.")
parser.add_option("-e", "--ether_source",
dest="ether_source", default=None,
help="The host Ethernet source address.")
parser.add_option("-g", "--ether_dest",
dest="ether_dest", default=None,
help="The gateway Ethernet destination address.")
(options, args) = parser.parse_args()
# Set up the vanilla packet
ip = ipv4()
ip.version = 4
ip.hlen = 5
ip.tos = 0
ip.length = 84
ip.id = 1
ip.flags = 0
ip.offset = 0
ip.ttl = 64
ip.protocol = IPPROTO_ICMP
ip.src = inet_atol(options.ip_source)
ip.dst = inet_atol(options.ip_dest)
ip.checksum = ip.calc_checksum()
icmp = icmpv4()
icmp.type = 8
icmp.code = 0
icmp.cksum = 0
echo = icmpv4echo()
echo.id = 12345
echo.seq = 0
icmp_packet = Chain([icmp, echo])
icmp.checksum = icmp_packet.calc_checksum()
ether = ethernet()
ether.type = 0x800
ether.src = ether_atob(options.ether_source)
ether.dst = ether_atob(options.ether_dest)
packet = Chain([ether, ip, icmp, echo])
input = PcapConnector("en0")
input.setfilter("icmp")
output = PcapConnector("en0")
count = 0
while (count < options.count):
out = output.write(packet.bytes, len(packet.bytes))
# packet = input.read()
# print packet
count += 1
main()
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