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()