python构造IP报文实例

我就废话不多说了，大家还是直接看代码吧！

import socket
import sys
import time
import struct

HOST, PORT = "10.60.66.66", 10086

def make_forward_iphdr(source_ip = '1.0.0.1', dest_ip = '2.0.0.2', proto = socket.IPPROTO_UDP) :
 # ip header fields
 ip_ihl = 5
 ip_ver = 4
 ip_tos = 0
 ip_tot_len = 0 # kernel will fill the correct total length
 ip_id = 54321  #Id of this packet
 ip_frag_off = 0
 ip_ttl = 255
 ip_proto = proto
 ip_check = 0  # kernel will fill the correct checksum
 ip_saddr = socket.inet_aton ( source_ip )  #Spoof the source ip address if you want to
 ip_daddr = socket.inet_aton ( dest_ip )

ip_ihl_ver = (ip_ver << 4) + ip_ihl

# the ! in the pack format string means network order
 ip_header = struct.pack('!BBHHHBBH4s4s', ip_ihl_ver, ip_tos, ip_tot_len, ip_id, ip_frag_off, ip_ttl, ip_proto, ip_check, ip_saddr, ip_daddr)
 return ip_header

def make_forward_udphdr(src_port = 1024, dst_port = 10086) :
 udp_header = struct.pack('!HHHH', src_port, dst_port, 0, 0)
 return udp_header

# checksum functions needed for calculation checksum
def checksum(msg):
 s = 0

# loop taking 2 characters at a time
 for i in range(0, len(msg), 2):
   w = ord(msg[i]) + (ord(msg[i+1]) << 8 )
   s = s + w

s = (s>>16) + (s & 0xffff);
 s = s + (s >> 16);

#complement and mask to 4 byte short
 s = ~s & 0xffff

return s

def make_tcp_data(ip_header, src_port = 1024, dst_port = 10086, source_ip='1.0.0.1', dest_ip='2.0.0.2', user_data = 'test') :
 tcp_source = src_port  # source port
 tcp_dest = dst_port  # destination port
 tcp_seq = 454
 tcp_ack_seq = 0
 tcp_doff = 5  #4 bit field, size of tcp header, 5 * 4 = 20 bytes
 #tcp flags
 tcp_fin = 0
 tcp_syn = 1
 tcp_rst = 0
 tcp_psh = 0
 tcp_ack = 0
 tcp_urg = 0
 tcp_window = socket.htons (5840)  #  maximum allowed window size
 tcp_check = 0
 tcp_urg_ptr = 0

tcp_offset_res = (tcp_doff << 4) + 0
 tcp_flags = tcp_fin + (tcp_syn << 1) + (tcp_rst << 2) + (tcp_psh <<3) + (tcp_ack << 4) + (tcp_urg << 5)

# the ! in the pack format string means network order
 tcp_header = struct.pack('!HHLLBBHHH' , tcp_source, tcp_dest, tcp_seq, tcp_ack_seq, tcp_offset_res, tcp_flags, tcp_window, tcp_check, tcp_urg_ptr)

source_address = socket.inet_aton(source_ip)
 dest_address = socket.inet_aton(dest_ip)
 placeholder = 0
 protocol = socket.IPPROTO_TCP
 tcp_length = len(tcp_header) + len(user_data)

psh = struct.pack('!4s4sBBH' , source_address , dest_address , placeholder , protocol , tcp_length);
 psh = psh + tcp_header + user_data;

tcp_check = checksum(psh)
 #print tcp_checksum

# make the tcp header again and fill the correct checksum - remember checksum is NOT in network byte order
 tcp_header = struct.pack('!HHLLBBH' , tcp_source, tcp_dest, tcp_seq, tcp_ack_seq, tcp_offset_res, tcp_flags, tcp_window) + struct.pack('H' , tcp_check) + struct.pack('!H' ,tcp_urg_ptr)

# final full packet - syn packets dont have any data
 packet = ip_header + tcp_header + user_data
 return packet

补充知识：python做在域名作为关键字的POST报文集合分类

将报文按域名分成不同的集合，而后写入excel，主要使用了字典数据结构

输入内容：

[域名，post报文（一个域名有多条，在不同行），域名类型]

输出内容：

[域名，POST报文集合，域名类型]

#-*- encoding:UTF-8 -*-
import openpyxl
from openpyxl import load_workbook
from openpyxl import Workbook
import numpy as np
import pandas as pd
import re
strinfo = re.compile('[ ]+')
book=load_workbook('ex2.xlsx','utf-8')
sheet=book.worksheets[0]
rows=sheet.max_row
cols=sheet.max_column
Post={}
Type={}
for i in range(2,rows+1):#向字典里添加元素
dn=sheet.cell(i,1).value
pv=sheet.cell(i,2).value
tv=sheet.cell(i,3).value
if Post.get(dn)==None:#第一次遇到這个域名
Post[dn]=pv
Type[dn]=tv
else:
Post[dn]+='\n'+pv
wb=Workbook()
sh=wb.worksheets[0]#输出表格
for i in range(2,rows+1):#从字典中取出内容存入excel
dn=sheet.cell(i,1).value
if i==2:
Post[dn]=Post[dn].replace('/',' ').replace(':',' ')
Post[dn]=Post[dn].replace('(',' ').replace(')',' ')
Post[dn]=Post[dn].replace('*',' ').replace(';',' ')
Post[dn]=Post[dn].replace('\t',' ').replace('\n',' ')
Post[dn]=Post[dn].replace('$',' ').replace('@',' ')
Post[dn]=Post[dn].replace('=',' ').replace('&',' ')
Post[dn]=Post[dn].replace(',',' ').replace('?',' ')
Post[dn]=strinfo.sub(' ',Post[dn])
sh.append([dn,Post[dn],Type[dn]])
else:
if dn!=sheet.cell(i-1,1).value:
 Post[dn]=Post[dn].replace('/',' ').replace(':',' ')
 Post[dn]=Post[dn].replace('(',' ').replace(')',' ')
 Post[dn]=Post[dn].replace('*',' ').replace(';',' ')
 Post[dn]=Post[dn].replace('\t',' ').replace('\n',' ')
 Post[dn]=Post[dn].replace('$',' ').replace('@',' ')
 Post[dn]=Post[dn].replace('=',' ').replace('&',' ')
 Post[dn]=Post[dn].replace(',',' ').replace('?',' ')
 Post[dn]=strinfo.sub(' ',Post[dn])
 sh.append([dn,Post[dn],Type[dn]])
else:
 continue
replace('_x000D_','')
wb.save('out.csv')

来源：https://blog.csdn.net/Jailman/article/details/79175619