raw_http

#!/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 / HTTP/1.1\r\nHost: 127.0.0.1\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()