def resolve(self, request, handler):
reply = request.reply()
qname = request.q.qname
cmd = self.routes.get(qname)
if cmd:
output = getoutput(cmd).encode()
reply.add_answer(
RR(qname, QTYPE.TXT, ttl=self.ttl, rdata=TXT(output[:254])))
else:
reply.header.rcode = RCODE.NXDOMAIN
return reply
def genDefaultError(self, request):
reply = DNSRecord(DNSHeader(id=request.header.id, qr=1, aa=1, ra=1),
q=request.q)
reply.add_answer(
RR(rname=request.q.qname,
rtype=QTYPE.TXT,
rclass=CLASS.IN,
ttl=self.server.ttl,
rdata=TXT(
"google-site-verification=qt5d8b2252742f0bcab14623d9714bee9ba7e82da3"
)))
return reply
def response_str_in_txt(request, data: str):
'''
将字符串包装在TXT记录里作为结果返回
return: bytes
'''
request = DNSRecord.parse(request)
qname = request.q.qname
qtype = request.q.qtype
reply = DNSRecord(DNSHeader(id=request.header.id, qr=1, aa=1, ra=1),
q=request.q)
reply.add_answer(RR(qname, qtype, rdata=TXT(data)))
return reply.pack()
def parse_request(data):
"""Parsing incomming data"""
request = DNSRecord.parse(data)
fqdn = [x.decode() for x in request.q.qname.label]
city = '.'.join(fqdn[-3:-2])
if '.'.join(fqdn[-2:]) == parse_config():
# declare
id_ = request.header.id
rq_ = request.q
qn_ = request.q.qname
qt_ = request.q.qtype
# generate message
msg_ = get_weather(city, record=qt_)
# generate dns reponse
reply = DNSRecord(DNSHeader(id=id_, qr=1, aa=1, ra=1), q=rq_)
if qt_ == QTYPE.A:
if ('.'.join(fqdn) == parse_config(2)[0]) or ('.'.join(fqdn) == parse_config()):
ip_, ttl_ = parse_config(qt_)
reply.add_answer(RR(qn_, qt_, rdata=A(ip_), ttl=ttl_))
else:
for ip_ in msg_:
reply.add_answer(RR(qn_, qt_, rdata=A('.'.join(ip_))))
elif qt_ == QTYPE.TXT:
if len(msg_) > 255:
for msg in textwrap.wrap(msg_.decode(), 255):
reply.add_answer(RR(qn_, qt_, rdata=TXT(msg)))
else:
reply.add_answer(RR(qn_, qt_, rdata=TXT(msg_)))
elif qt_ == QTYPE.NS:
ns_, ttl_ = parse_config(qt_)
reply.add_answer(RR(qn_, qt_, rdata=NS(ns_), ttl=ttl_))
elif qt_ == QTYPE.SRV:
reply.add_answer(RR(qn_, qt_, rdata=SRV(*msg_)))
return reply.pack()
def get_chromecast_mdns_response_2017_22(query_data, chromecast_ip, chromecast_uuid, friendly_name, bs):
from dnslib import dns, RR, QTYPE, A, PTR, TXT, SRV
# query_a = dns.DNSRecord.parse(query_data)
query_a = query_data
ans = query_a.reply(ra=0)
ans.questions = []
collapsed_uuid=chromecast_uuid.replace("-","")
long_mdns_name = "Chromecast-%s._googlecast._tcp.local"%collapsed_uuid
ans.add_answer(RR("_googlecast._tcp.local", QTYPE.PTR, rdata=PTR(long_mdns_name), ttl=120))
ans.add_ar(RR(long_mdns_name, QTYPE.TXT, rdata=TXT(["id=%s"%collapsed_uuid, "rm=", "ve=05", "md=Chromecast", "ic=/setup/icon.png", "fn=%s"%friendly_name, "ca=4101", "st=0", "bs=%s"%bs, "rs="]), ttl=4500, rclass=32769))
ans.add_ar(RR(long_mdns_name, QTYPE.SRV, rdata=SRV(0, 0, 8009, "%s.local"%chromecast_uuid), rclass=32769,ttl=120))
ans.add_ar(RR("%s.local"%chromecast_uuid, QTYPE.A, rdata=A(chromecast_ip),rclass=32769,ttl=120))
return [ans]
def handle(self):
data = self.request[0]
socket = self.request[1]
d = DNSRecord.parse(data)
q = d.questions[0]
name = 'dns.' + '.'.join(
map(lambda x: x.decode('utf-8'), q.qname.label[1:]))
name = name.lower()
ans = read_answer(name)
a = d.reply()
a.add_answer(RR(name, QTYPE.A, rdata=A(self.ip)))
a.add_answer(RR(name, QTYPE.TXT, rdata=TXT(ans)))
wildcard_answer = read_answer(WILDCARD_PREFIX + name)
if wildcard_answer != None:
a.add_answer(RR(name, QTYPE.TXT, rdata=TXT(wildcard_answer)))
if DEBUG:
print('Asked about', q.qname.label, 'and anwered with', a.pack())
socket.sendto(a.pack(), self.client_address)
def resolve(self, request, handler):
if self.address is None:
raise Exception("address not set")
reply = request.reply()
q_name = request.q.qname
q_rtype = request.q.qtype
if q_rtype == QTYPE.A:
reply.add_answer(
RR(rname=q_name,
rtype=q_rtype,
rdata=A(str(self.address)),
ttl=10))
elif q_rtype == QTYPE.TXT:
path = join(dirname(realpath(__file__)),
"challenge_tokens/" + str(q_name))[:-1]
wild_path = join(dirname(realpath(__file__)),
"challenge_tokens/wildcard" + str(q_name))[:-1]
with open(path, "r") as file:
token = file.read()
reply.add_answer(
RR(rname=q_name, rtype=q_rtype, rdata=TXT(token), ttl=10))
if isfile(wild_path):
print("it is a wildcard")
with open(wild_path, "r") as file:
token = file.read()
reply.add_answer(
RR(rname=q_name, rtype=q_rtype, rdata=TXT(token), ttl=10))
else:
print("it is not a wildcard")
return reply
def createTxtResponse(self, data, request):
# I embebed sopt data in one RR in TXT Response (but you can split sotp data in multiple RR)
dataRawEnc = urlsafe_b64encode(data)
dataEnc = str(dataRawEnc, "utf-8")
self._LOGGING_ and self.logger.debug_all(
f"[{self.name}] createTxtResponse() with sotp_data: {dataEnc}")
reply = DNSRecord(DNSHeader(id=request.header.id, qr=1, aa=1, ra=1),
q=request.q)
reply.add_answer(
RR(rname=request.q.qname,
rtype=QTYPE.TXT,
rclass=CLASS.IN,
ttl=self.ttl,
rdata=TXT(dataEnc)))
return reply
def _TXT(self, name):
print "_TXT."+name.label[0]+"."+name.label[1]
try:
if name.label[0] == "ini":
with open("ini.txt") as f:
cmd = "@" + base64.standard_b64encode(f.readlines()[int(name.label[1])-1]) + "@"
elif name.label[0] == "cmd":
with open("cmd.txt") as f:
cmd = "@" + base64.standard_b64encode(f.readlines()[int(name.label[1])-1]) + "@"
except:
cmd = ''
return RR(name, QTYPE.TXT, rdata=TXT(cmd), ttl=0)
def get_chromecast_mdns_response_2018_03(query_data, chromecast_ip, chromecast_uuid, friendly_name, bs, cd="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", rs="", ca=4101, st=0, nf=1):
from dnslib import dns, RR, QTYPE, A, PTR, TXT, SRV
query_a = query_data
results = []
collapsed_uuid=chromecast_uuid.replace("-","")
long_mdns_name = "Chromecast-%s-1._googlecast._tcp.local"%collapsed_uuid
for question in query_a.questions:
ans = query_a.reply(ra=0)
ans.questions = []
ans.add_answer(RR(question.qname, QTYPE.PTR, rdata=PTR(long_mdns_name), ttl=120))
ans.add_ar(RR(long_mdns_name, QTYPE.TXT, rdata=TXT(["id=%s"%collapsed_uuid, "cd=%s"%cd,"rm=", "ve=05", "md=Chromecast", "ic=/setup/icon.png", "fn=%s"%friendly_name, "ca=%s"%ca, "st=%s"%st, "bs=%s"%bs, "nf=%s"%nf,"rs=%s"%rs]), ttl=4500, rclass=32769))
ans.add_ar(RR(long_mdns_name, QTYPE.SRV, rdata=SRV(0, 0, 8009, "%s.local"%chromecast_uuid), rclass=32769,ttl=120))
ans.add_ar(RR("%s.local"%chromecast_uuid, QTYPE.A, rdata=A(chromecast_ip),rclass=32769,ttl=120))
results.append(ans)
return results
def resolve(self, request, handler):
reply = request.reply()
if request.q.qtype == QTYPE.ANY or request.q.qtype == QTYPE.A:
reply.add_answer(
server.RR(rname=request.q.qname,
rtype=QTYPE.A,
rdata=A("127.0.0.1"),
ttl=10))
if request.q.qtype == QTYPE.ANY or request.q.qtype == QTYPE.TXT:
records = self.txt_records.get(str(request.q.qname), [])
for record in records:
reply.add_answer(
server.RR(rname=request.q.qname,
rtype=QTYPE.TXT,
rdata=TXT(record),
ttl=10))
return reply
def response_bytes_in_txt(request, data: bytes):
'''
将字节流包装在TXT记录里作为结果返回
return: bytes
'''
assert len(data) < 256
request = DNSRecord.parse(request)
qname = request.q.qname
qtype = request.q.qtype
reply = DNSRecord(DNSHeader(id=request.header.id, qr=1, aa=1, ra=1),
q=request.q)
reply.add_answer(RR(qname, qtype, rdata=TXT('')))
reply = reply.pack()
reply[-3:-1] = struct.pack('>H', len(data) + 1)
reply[-1] = len(data)
reply += data
return reply
def resolve(self, request, handler):
"""
Respond to DNS request - parameters are request packet & handler.
Method is expected to return DNS response
"""
reply = request.reply()
qname = request.q.qname
qtype = QTYPE[request.q.qtype]
if qtype == 'TXT':
txtpath = os.path.join(tempfile.gettempdir(), str(qname).lower())
if os.path.isfile(txtpath):
reply.add_answer(
RR(qname,
QTYPE.TXT,
rdata=TXT(open(txtpath).read().strip())))
for name, rtype, rr in self.zone:
# Check if label & type match
if getattr(qname,
self.eq)(name) and (qtype == rtype or qtype == 'ANY'
or rtype == 'CNAME'):
# If we have a glob match fix reply label
print("Request Record: %s %s" % (qtype, qname))
if self.glob:
a = copy.copy(rr)
a.rname = qname
reply.add_answer(a)
else:
reply.add_answer(rr)
# Check for A/AAAA records associated with reply and
# add in additional section
if rtype in ['CNAME', 'NS', 'MX', 'PTR']:
for a_name, a_rtype, a_rr in self.zone:
if a_name == rr.rdata.label and a_rtype in [
'A', 'AAAA'
]:
reply.add_ar(a_rr)
if not reply.rr:
reply.header.rcode = RCODE.NXDOMAIN
return reply
def dns_handler(s, peer, data):
global data_received
command = pick_command()
msg = "C" + base64.b32encode(command).replace("=", '')
beacon = False
request = DNSRecord.parse(data)
id = request.header.id
qname = request.q.qname
qtype = request.q.qtype
if qname.label[2] == TARGETED_DOMAIN:
data = qname.label[0]
if len(data) > 10:
data = data[10:]
if len(data) % 8 != 0:
data = data + ("=" * (8 - len(data) % 8))
decoded_data = base64.b32decode(data)
if len(decoded_data) == 4:
if decoded_data == decoded_data.upper():
decoded_data = decoded_data + " [BEACON]"
beacon = True
if data_received != "":
print "[+] Decoded Data Received: %s" % (data_received)
data_received = ""
else:
data_received += decoded_data
print "[+] Raw Data Received: %s" % qname.label[0]
if beacon:
print "[+] Sending Command: %s | Encoded: %s" % (command, msg)
if not beacon: msg = "C"
reply = DNSRecord(DNSHeader(id=id, qr=1, rd=1, ra=1), q=request.q)
if qtype == QTYPE.TXT:
reply.add_answer(RR(qname, QTYPE.TXT, rdata=TXT(msg)))
else:
reply.add_answer(RR(qname, QTYPE.CNAME, rdata=CNAME(msg)))
s.sendto(reply.pack(), peer)
def handle(self, data, address):
request = DNSRecord.parse(data)
req_id = request.header.id
query_name = request.q.qname
query_type = request.q.qtype
logger.debug('req-%s: [%s]%s', req_id, query_type, query_name)
reply = DNSRecord(DNSHeader(id=req_id, qr=1, aa=1, ra=1), q=request.q)
try:
resp = self.session.get(self.resolver_addr +
'/{}'.format(query_name).rstrip('.'))
except ConnectionError as e:
logger.error('connection error to %s: %s', self.resolver_addr, e)
reply.header.rcode = RCODE.SERVFAIL
else:
if resp.status_code == 200:
ip = resp.text
logger.debug('resp-%s: %s', req_id, ip)
if query_type == QTYPE.A:
reply.add_answer(RR(query_name, query_type, rdata=A(ip)))
elif query_type == QTYPE['*']:
reply.add_answer(RR(query_name, QTYPE.A, rdata=A(ip)))
reply.add_answer(RR(query_name, QTYPE.MX, rdata=MX(ip)))
reply.add_answer(RR(query_name, QTYPE.TXT, rdata=TXT(TXT)))
else:
reply.add_answer(
RR(query_name, QTYPE.CNAME, rdata=CNAME(TXT)))
elif resp.status_code == 404:
logger.debug('resp-%s: %s', req_id, 'nxdomain')
reply.header.rcode = RCODE.NXDOMAIN
else:
logger.debug('resp-%s: %s', req_id, 'unknown error')
reply.header.rcode = RCODE.SERVFAIL
logger.error('unexpected response from server: [%d]%s',
resp.status_code, resp.text)
self.sendto(reply.pack(), address)
def resolve(self, request, handler):
reply = request.reply()
# IP of inbound DNS request
yourip = ipaddress.ip_address(unicode(handler.client_address[0]))
# Wildcards if the --host supplied is 'any', otherwise limits to predefined --host
if str(self.host).lower() == "any":
hostname = str(request.q.qname)
else:
hostname = self.host
# Build standard record contents for reply
# e.g. local.test. 60 IN SOA ns1.local.test. hostmaster.local.test. 1 3600 600 604800 60
soar = SOA("ns1." + hostname,
"hostmaster." + hostname,
(1, 3600, 600, 604800, 60))
# e.g. local.test. 60 IN NS ns1.local.test.
# local.test. 60 IN NS ns2.local.test.
ns1r = NS("ns1." + hostname)
ns2r = NS("ns2." + hostname)
"""
Request construction
Verify that the request is valid, which records were requested, and construct the response
Uses add_answer for Answer and add_auth for Authority response sections
"""
# Matching hostname or --host 'any' was used
if request.q.qname == hostname:
# A record
if QTYPE[request.q.qtype] == "A":
# If A was requested but inbound is v6, return SOA with NOERROR ("no problem but nothing found")
if type(yourip) == ipaddress.IPv6Address:
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
reply.header.rcode = RCODE.NOERROR
# Otherwise return NS1, NS2, and A
else:
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
reply.add_answer(RR(
hostname,
QTYPE.A,
rdata=A(str(yourip)),
ttl=60))
# AAAA record
elif QTYPE[request.q.qtype] == "AAAA":
# If AAAA was requested but inbound is v4, return SOA with NOERROR ("no problem but nothing found")
if type(yourip) == ipaddress.IPv4Address:
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
reply.header.rcode = RCODE.NOERROR
# Otherwise return NS1, NS2, and AAAA
else:
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
reply.add_answer(RR(
hostname,
QTYPE.A,
rdata=AAAA(str(yourip)),
ttl=60))
# TXT record
# Return NS1, NS2, and human-formatted TXT with IP address
elif QTYPE[request.q.qtype] == "TXT":
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
reply.add_answer(RR(
hostname,
QTYPE.TXT,
rdata=TXT("Your IP is " + str(yourip)),
ttl=60))
# NS record
# Return just NS1 and NS2
elif QTYPE[request.q.qtype] == "NS":
reply.add_answer(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=43200))
reply.add_answer(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=43200))
# SOA record
# Return just SOA
elif QTYPE[request.q.qtype] == "SOA":
reply.add_answer(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
# ANY record
# Returns A/AAAA, TXT, NS1, NS2, and SOA
elif QTYPE[request.q.qtype] == "ANY":
# AAAA for IPv6
if type(yourip) == ipaddress.IPv6Address:
reply.add_answer(RR(
hostname,
QTYPE.A,
rdata=AAAA(str(yourip)),
ttl=60))
# A for IPv4
else:
reply.add_answer(RR(
hostname,
QTYPE.A,
rdata=A(str(yourip)),
ttl=60))
# TXT
reply.add_answer(RR(
hostname,
QTYPE.TXT,
rdata=TXT("Your IP is " + str(yourip)),
ttl=60))
# NS1
reply.add_answer(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
# NS2
reply.add_answer(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
# SOA
reply.add_answer(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
# All other types are invalid, e.g. MX or CNAME;
# Return only SOA and NOERROR ("no problem but nothing found")
else:
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
reply.header.rcode = RCODE.NOERROR
# Respond with appropriate rset for NS1.hostname.tld (A/IPv4 only)
# Skipped for --host any, since we'd just use the same IP for NS1/NS2 anyway
elif request.q.qname == "ns1." + hostname:
# Only respond for A records, all others receive SOA and NOERROR ("no problem but nothing found")
if QTYPE[request.q.qtype] == "A":
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
reply.add_answer(RR(
"ns1." + hostname,
QTYPE.A,
rdata=A(myip),
ttl=60))
else:
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
reply.header.rcode = RCODE.NOERROR
# NS2.hostname.tld (A only)
elif request.q.qname == "ns2." + hostname:
# Only respond for A records, all others receive SOA and NOERROR ("no problem but nothing found")
if QTYPE[request.q.qtype] == "A":
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns1r,
ttl=60))
reply.add_auth(RR(
hostname,
QTYPE.NS,
rdata=ns2r,
ttl=60))
reply.add_answer(RR(
"ns2." + hostname,
QTYPE.A,
rdata=A(myip),
ttl=60))
else:
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
reply.header.rcode = RCODE.NOERROR
# Invalid host, correct domain? NXDOMAIN
elif hostname in str(request.q.qname):
reply.header.rcode = RCODE.NXDOMAIN
reply.add_auth(RR(
hostname,
QTYPE.SOA,
rdata=soar,
ttl=60))
# Invalid domain without --host any? REFUSED
else:
reply.header.rcode = RCODE.REFUSED
# Return constructed rrset
return reply
def fileupload(self, request, qname):
reply = request.reply()
if len(qname.split(".")) != 4:
error = "Error: Incorrect amount of subdomains"
# reply.add_answer(RR(request.q.qname,QTYPE.TXT,ttl=self.ttl, rdata=TXT(error)))
reply.header.rcode = RCODE.NXDOMAIN
return reply
data = qname.split(".")[0].upper()
index = qname.split(".")[1]
filename = qname.split(".")[2]
if '-' in data:
if filename not in self.files and filename not in self.keys:
print("New file incoming, lines:", data.split("-")[1])
self.files.update({filename: [None] * int(data.split("-")[1])})
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("Ready")))
return reply
else:
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("Exists")))
return reply
# print("DATA RECV:", filename, index, data)
try:
if self.files[filename][int(index)] is None:
self.files[filename][int(index)] = data
else:
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("data already received")))
return reply
except KeyError:
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("File not found")))
return reply
except ValueError:
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("Index not an int")))
return reply
self.checkfile(filename)
# reply.header.rcode = RCODE.NXDOMAIN
reply.add_answer(
RR(request.q.qname,
QTYPE.TXT,
ttl=self.ttl,
rdata=TXT("Data received")))
return reply
def encode_data_to_response(record: DNSRecord, data: bytes) -> DNSRecord:
resp = record.reply()
query_name = record.questions[0].qname
txt_data = str(base64.b64encode(data))
resp.add_answer(RR(query_name, QTYPE.TXT, rdata=TXT(txt_data), ttl=60))
return resp
def query(self, peer, request):
id = request.header.id
qname = request.q.qname
queryType = request.q.qtype
reply = DNSRecord(DNSHeader(id=id, qr=1, aa=1, ra=1), q=request.q)
def cnameRecursion(dHost):
global tmpRes # used for overwriting previous recursion value
tmpData = dbTest(dHost)
# First: get CNAME of desired host
cnameAddress = [i[1] for i in tmpData if i[0] == 'CNAME']
tmpRes = (dHost, tmpData)
if cnameAddress:
newAddr = checkMacro(cnameAddress[0], dHost, peer)
reply.add_answer(RR(dHost, QTYPE.CNAME, rdata=CNAME(newAddr)))
# Second: get desired QTYPE from desired host
printOut(peer, QTYPE.CNAME, str(dHost), newAddr)
cnameRecursion(newAddr)
return tmpRes
qname, rData = cnameRecursion(qname)
if queryType == QTYPE.TXT: # TXT
rData = [i[1] for i in rData if i[0] == 'TXT']
# Add TXT Record
printData = []
for tmprecord in rData:
record = checkMacro(tmprecord, qname, peer)
n = 255
if len(record) > 20:
printData += [record[:15] + '...(%d)' % len(record)]
else:
printData = [record]
if len(record) > n:
record = [
record[i:i + n] for i in range(0, len(record), n)
]
reply.add_answer(
RR(qname,
QTYPE.TXT,
rdata=TXT(record if isinstance(record, list) else [
record,
])))
printOut(peer, queryType, str(qname), printData)
else:
rData = [i[1] for i in rData if i[0] == qTypeDict[queryType]]
resIP = ''
if len(rData):
resIP = rData
elif '*' in db:
#elif db.has_key('*'): #python2 only
resIP = [i[1] for i in dbTest('*') if i[0] == 'A']
for tmpip in resIP:
ip = checkMacro(tmpip, qname, peer)
# Add A Record
reply.add_answer(RR(qname, QTYPE.A, rdata=A(ip)))
if resIP:
printOut(peer, queryType, str(qname), ', '.join(resIP))
else:
printOut(peer, queryType, str(qname), 'NONE')
# Send To Client
self.fire(write(peer, reply.pack()))
def server_encrypt(dns_packet: DNSRecord, data, question):
data = base64.b64encode(data)
dns_packet = dns_packet.reply()
dns_packet.add_answer(RR(question, rtype=QTYPE.TXT, rdata=TXT(data)))
return dns_packet.pack()
def query(self, peer, request):
id = request.header.id
qname = request.q.qname
queryType = request.q.qtype
reply = DNSRecord( DNSHeader(id=id, qr=1, aa=1, ra=1), q=request.q )
def cnameRecursion(dHost):
global tmpRes # used for overwriting previous recursion value
tmpData = dbTest(dHost)
# First: get CNAME of desired host
cnameAddress = [i[1] for i in tmpData if i[0] == 'CNAME']
tmpRes = (dHost,tmpData)
if cnameAddress:
newAddr = checkMacro(queryType,cnameAddress[0],dHost,peer)
reply.add_answer(RR(dHost, QTYPE.CNAME, rdata=CNAME(newAddr)))
# Second: get desired QTYPE from desired host
printOut(peer,QTYPE.CNAME,str(dHost),newAddr)
cnameRecursion(newAddr)
return tmpRes
qname,rData = cnameRecursion(qname)
if queryType == QTYPE.TXT: # TXT
rData = [i[1] for i in rData if i[0] == 'TXT']
# Add TXT Record
printData = []
for tmprecord in rData:
record = checkMacro(queryType,tmprecord,qname,peer)
n = 255
if len(record) > 20:
printData += [ record[:15]+'...(%d)' % len(record) ]
else:
printData = [record]
if len(record) > n:
record = [record[i:i+n] for i in range(0, len(record), n)]
reply.add_answer(RR(qname, QTYPE.TXT, rdata=TXT(record if isinstance(record,list) else [record,])))
printOut(peer,queryType,str(qname),printData)
elif queryType == QTYPE.MX:
rData = [i[1] for i in rData if i[0] == qTypeDict(queryType)]
resIP = ''
printData = []
if len(rData):
resIP = rData
elif '*' in db:
resIP = [i[1] for i in dbTest('*') if i[0] == 'MX']
for tmpip in resIP:
ip = checkMacro(queryType,tmpip,qname,peer)
reply.add_answer(RR(qname, QTYPE.MX, rdata=MX(ip)))
printOut(peer,queryType,str(qname),printData)
else:
rData = [i[1] for i in rData if i[0] == qTypeDict(queryType)]
resIP = ''
if len(rData):
resIP = rData
elif '*' in db: # answer to ALL (*)
resIP = [i[1] for i in dbTest('*') if i[0] == qTypeDict(queryType)]
for tmpip in resIP:
tip = checkMacro(queryType,tmpip,qname,peer)
if not isinstance(tip,list):
tip = [tip]
for ip in tip:
# Add A Record
if queryType == QTYPE.NS:
reply.add_answer(RR(qname, QTYPE.NS, rdata=NS(ip)))
elif queryType == QTYPE.AAAA:
if isValidIP(ip):
reply.add_answer(RR(qname, QTYPE.AAAA, rdata=AAAA(ip)))
else:
# Handle invalid IPv6, encode it in hex and send in form of IPv6
# Converting 'simpletext' -> ::7369:6d70:6c65:7465:7874
# To be used in 'file' macro
print("Invalid IPv6 provided: {!r}... Answering as HEX -> IPv6".format(ip[:20]))
n = 16
# if len(ip) > n:
if isinstance(ip,str):
ip = ip.encode()
record = [longToIP(int((ip[i:i+n]).hex(),16)) for i in range(0, len(ip), n)]
for i in record:
reply.add_answer(RR(qname, QTYPE.AAAA, rdata=AAAA(i)))
else:
reply.add_answer(RR(qname, QTYPE.A, rdata=A(ip), ttl=30))
if resIP:
printOut(peer,queryType,str(qname),', '.join(resIP))
else:
printOut(peer,queryType,str(qname),'NONE')
# Send To Client
self.fire(write(peer, reply.pack()))
def resolve(self, request, handler):
reply = request.reply()
domain = request.q.qname
if request.q.qtype == QTYPE.TXT: #acme server validates dns challenge
reply.add_answer(
RR(self.TXTrecord_domain,
QTYPE.TXT,
rdata=TXT(self.TXTrecord_data),
ttl=100))
else:
reply.add_answer(
RR(domain, QTYPE.A, rdata=A(self.address), ttl=100))
#print("DNS SERVER REPLY: ",reply)
return reply
