python解析发往本机的数据包示例 (解析数据包)_程序人生

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) + \’ Acknowledgement : \’ + str(acknowledgement) + \’ TCP header length : \’ + str(tcph_length)

data = packet[40:len(packet)]
print \’Data : \’ + data

# disabled promiscuous mode
s.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)

udp.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 udp 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]

    if protocol == 17:
        udp_header = packet[20:28]
        udph = unpack(\’!HHHH\’ , udp_header)
        source_port = udph[0]
        dest_port = udph[1]
        length = udph[2]
        checksum = udph[3]
        data = packet[28:len(packet)]

        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)
        print \’Source Port : \’ + str(source_port) + \’ Dest Port : \’ + str(dest_port) + \’ Length : \’ + str(length) + \’ Checksum : \’ + str(checksum)
        print \’Data : \’ + data

# disabled promiscuous mode
s.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)