Python原始套接字编程

#!/usr/bin/env python
  
#-------------------------------------------------------------------------------
# Name:     raw_http.py
# Purpose:       construct a raw http get packet
#
# Licence:   PythonTab.com    
#-------------------------------------------------------------------------------
  
import sys
import socket
from impacket import ImpactDecoder, ImpactPacket
  
def main():
  
    if len(sys.argv) = 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()