#!/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()