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packetSnifferTCP.py
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65 lines (49 loc) · 1.59 KB
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#!/usr/bin/env python
import socket
import struct
import binascii
IP, TCP, HTTP = False, False, False
def parseETH(pkt):
ethHeader = struct.unpack("!6s6s2s", pkt)
print "Source MAC-Addr: ", binascii.hexlify(ethHeader[1])
print "Destination MAC-Addr: ",binascii.hexlify(ethHeader[0])
global IP
if binascii.hexlify(ethHeader[2]) == '0800':
IP = True
def parseIP(pkt):
#9bytes(version, length, type of sservice, total length, identification, flags, fragment offset, time to live
#1byte(Protocol) 2byte(Header checksum, 2x 4byte( Source and Dest
ipHeader = struct.unpack("!9s1s2s4s4s", pkt)
print "Source Address is: ",ipHeader[3]
print "Destination Address is: ",ipHeader[4]
global TCP
if binascii.hexlify(ipHeader[1]) == '06':
TCP = True
def parseTCP(pkt):
tcpPacket = struct.unpack("!HHLLBBHHH", pkt)
if tcpPacket[0] == '80' or tcpPacket[1] == '80':
global HTTP
HTTP = True
print "Source Port: ", tcpPacket[0]
print "Dest Port: ", tcpPacket[1]
print "Sequence Number: ", tcpPacket[2]
print "ACK Number: ", tcpPacket[3]
print "Data-Offset: ", tcpPacket[4]
print "flag: ", tcpPacket[5]
print "window: ", tcpPacket[6]
print "Checksum: ", tcpPacket[7]
print "Urgent Pointer: ", tcpPacket[8]
def parseHTTP(data):
print "HTTP Data: ", data
rawsocket = socket.socket(socket.PF_PACKET, socket.SOCK_RAW, socket.htons(0x0800))
while True:
pkt = rawsocket.recvfrom(2048)
IP, TCP, HTTP = False, False, False
parseETH(pkt[0][0:14])
if IP:
parseIP(pkt[0][14:34])
if TCP:
parseTCP(pkt[0][34:54])
if HTTP:
parseHTTP(pkt[0][54:])
print "##################################"