python解析发往本机的数据包示例 (解析数据包)
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2020-12-23
18:10:10
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python解析发往本机的数据包示例解析发往本机的数据包示例 (解析数据包解析数据包)
tcp.py
复制代码 代码如下:
# -*- coding: cp936 -*-
import socket
from struct import *
from time import ctime,sleep
from os import system
system(‘title tcp sniffer’)
system(‘color 05’)
# the public network interface
HOST = socket.gethostbyname(socket.gethostname())
# create a raw socket and bind it to the public interface
s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_IP)
s.bind((HOST, 0))
# Include IP headers
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
# receive all packages
#s.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
# receive a package
while 1==1:
packet = s.recvfrom(65565)
packet = packet[0]
ip_header = packet[0:20]
iph = unpack(‘!BBHHHBBH4s4s’,ip_header)
version = iph[0] >> 4 #Version
ihl = iph[0] * 0xF #IHL
iph_length = ihl * 4 #Total Length
ttl = iph[5]
protocol = iph[6]
s_addr = socket.inet_ntoa(iph[8])
d_addr = socket.inet_ntoa(iph[9])
print ctime()
print ‘Version : ‘ + str(version) + ‘ IHL : ‘ + str(ihl) + ‘ Total Length: ‘+str(iph_length) + ‘ TTL : ‘ +str(ttl) + ‘ Protocol : ‘ +
str(protocol) + ‘ Source Address : ‘ + str(s_addr) + ‘ Destination Address : ‘ + str(d_addr)
if protocol == 6:
tcp_header = packet[20:40]
tcph = unpack(‘!HHLLBBHHH’ , tcp_header)
source_port = tcph[0]
dest_port = tcph[1]
sequence = tcph[2]
acknowledgement = tcph[3]
doff_reserved = tcph[4]
tcph_length = doff_reserved >> 4
print ‘Source Port : ‘ + str(source_port) + ‘ Dest Port : ‘ + str(dest_port) + ‘ Sequence Number : ‘ + str(sequence) + ‘
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