Python原始套接字编程

来源(PythonTab:Python中文开发者社区门户)

From: http://www.pythontab.com/html/2014/pythonhexinbiancheng_0217/697.html

Python原始套接字编程

2014-02-17 09:44:11 来源:

在实验中需要自己构造单独的HTTP数据报文,而使用SOCK_STREAM进行发送数据包,需要进行完整的TCP交互。

因此想使用原始套接字进行编程,直接构造数据包,并在IP层进行发送,即采用SOCK_RAW进行数据发送。

使用SOCK_RAW的优势是,可以对数据包进行完整的修改,可以处理IP层上的所有数据包,对各字段进行修改,而不受UDP和TCP的限制。

下面开始构造HTTP数据包,

IP层和TCP层使用python的Impacket库,http内容自行填写。

#!/usr/bin/env python
  
#-------------------------------------------------------------------------------
# Name:     raw_http.py
# Purpose:       construct a raw http get packet
#
# Author:    Yangjun
#
# Created:       08/02/2014
# Copyright:   (c) Yangjun 2014
# Licence:       <your licence>
#-------------------------------------------------------------------------------
  
import sys
import socket
from impacket import ImpactDecoder, ImpactPacket
  
def main():
  
    if len(sys.argv) < 3:
        print "Use: %s <src ip> <dst ip>" % sys.argv[0]
        print "Use: %s <src ip> <dst ip> <cnt>" % sys.argv[0]
        sys.exit(1)
    elif len(sys.argv) == 3:
        src = sys.argv[1]
        dst = sys.argv[2]
        cnt = 1
    elif len(sys.argv) ==4:
        src = sys.argv[1]
        dst = sys.argv[2]
        cnt = sys.argv[3]
    else:
        print "Input error!"
        sys.exit(1)
#print src, dst
    ip = ImpactPacket.IP()
    ip.set_ip_src(src)
    ip.set_ip_dst(dst)
  
    # Create a new ICMP packet of type ECHO.
    icmp = ImpactPacket.ICMP()
    tcp = ImpactPacket.TCP()
    tcp.set_th_sport(55968)
    tcp.set_th_dport(80)
    tcp.set_th_seq(1)
    tcp.set_th_ack(1)
    tcp.set_th_flags(0x18)
    tcp.set_th_win(64)
  
    tcp.contains( ImpactPacket.Data("GET /att/DIYLife/41264/528 HTTP/1.1\r\nHost: 192.168.111.1\r\nAccept-Encoding: identity\r\n\r\n"))
  
    ip.contains(tcp)
  
    # Open a raw socket. Special permissions are usually required.
    s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
    s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
    seq_id = 0
    while cnt >= 1:
        # Calculate its checksum.
        seq_id = seq_id + 1
        tcp.set_th_seq(seq_id)
        tcp.calculate_checksum()
  
        # Send it to the target host.
        s.sendto(ip.get_packet(), (dst,80))
        cnt= cnt -1
  
if __name__ == '__main__':
    main()

Link: http://www.asm32.net/article_details.aspx?id=6246


浏览次数 0 发布时间 2014/3/6 13:51:16 从属分类 Python 【评论】【 】【打印】【关闭
 
| www.asm32.net | 2006版 | 资料中心 | linux | asm/asm32 | C/C++ | VC++ | java | Python | 书签 | ASP.Net书签 | 京ICP备09029108号-1