Differenze per "fakeDNS.py"

# # ATTENTION: See dnsmasq --address=/#/1.2.3.4 before!!!!! # #FORMAT python #! /usr/bin/env python

# Fake dns multithread

from SocketServer import *

FAKEADDRESS="111.111.111.111" PORT=53 #udp

class DNSQuery:

• #da http://preachermm.blogspot.com/2006/04/servidor-fake-dns-en-python.html (single thread) def init(self, data):

  • self.data=data

    self.dominio= tipo = (ord(data[2]) >> 3) & 15 # Opcode bits if tipo == 0: # Standard query

    • ini=12 lon=ord(data[ini]) while lon != 0:
      • self.dominio+=data[ini+1:ini+lon+1]+'.' ini+=lon+1 lon=ord(data[ini])
  def respuesta(self, ip):

  • packet= if self.dominio:

    • packet+=self.data[:2] + "\x81\x80" packet+=self.data[4:6] + self.data[4:6] + '\x00\x00\x00\x00' # Questions and Answers Counts packet+=self.data[12:] # Original Domain Name Question packet+='\xc0\x0c' # Pointer to domain name

      packet+='\x00\x01\x00\x01\x00\x00\x00\x3c\x00\x04' # Response type, ttl and resource data length -> 4 bytes packet+=str.join(,map(lambda x: chr(int(x)), ip.split('.'))) # 4bytes of IP

    return packet

#DNSQuery

class DNSRequestHandler (DatagramRequestHandler):

• def handle(self):
  • DNSRequest=self.rfile.read() q=DNSQuery(DNSRequest) DNSDatagram=q.respuesta(FAKEADDRESS) self.wfile.write(DNSDatagram)

#DNSRequestHandler

#crea una classe di server udp threadizzato class FakeDNSServer (ThreadingMixIn, UDPServer): pass

dummyDNS=FakeDNSServer((,PORT),DNSRequestHandler)

#per prevenire attacchi, l'unico modo x fermare il server e' killarlo (SIGTERM, SIGKILL) o premere ctrl-C going=True while going:

• try:
  • dummyDNS.serve_forever()

  except KeyboardInterrupt:

  • going=False
  except:
  • pass