2014-12-22 16:00:45 -05:00

56 lines
1.5 KiB
Python
Executable File

#!/usr/bin/env python
__author__ = "bt3"
import socket
import os
import struct
import ctypes
from ICMPHeader import ICMP
# host to listen on
HOST = '192.168.1.114'
def main():
socket_protocol = socket.IPPROTO_ICMP
sniffer = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket_protocol)
sniffer.bind(( HOST, 0 ))
sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
# continually read in packets and parse their information
while 1:
# read in a packet and pass the first 20 bytes to initialize the IP structure
raw_buffer = sniffer.recvfrom(65565)[0]
#take first 20 characters for the ip header
ip_header = raw_buffer[0:20]
#unpack them
iph = struct.unpack('!BBHHHBBH4s4s' , ip_header)
# print
version_ihl = iph[0]
version = version_ihl >> 4
ihl = version_ihl & 0xF
iph_length = ihl * 4
ttl = iph[5]
protocol = iph[6]
s_addr = socket.inet_ntoa(iph[8]);
d_addr = socket.inet_ntoa(iph[9]);
print 'IP -> Version:' + str(version) + ', Header Length:' + str(ihl) + \
', TTL:' + str(ttl) + ', Protocol:' + str(protocol) + ', Source:'\
+ str(s_addr) + ', Destination:' + str(d_addr)
# create our ICMP structure
buf = raw_buffer[iph_length:iph_length + ctypes.sizeof(ICMP)]
icmp_header = ICMP(buf)
print "ICMP -> Type:%d, Code:%d" %(icmp_header.type, icmp_header.code) + '\n'
if __name__ == '__main__':
main()