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soatest.py
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#!/usr/local/bin/python3.6
import socket
#pip install dnslib
from dnslib import A, SOA, RR, DNSHeader, DNSRecord, QTYPE, RCODE
class SOATestServer():
def __init__(self, ipaddr):
self.host = ipaddr
self.port = 53
self.ttl = 30
self.minimum = 15
self.soaQname = "shutingrz.com."
self.nsQname = "ns." + self.soaQname
self.adminQname = "admin." + self.soaQname
def run(self):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((self.host, self.port))
print("Server Started.")
while True:
msg, (cliHost, cliPort) = sock.recvfrom(8096)
print("Received DNS Packet. Client:" + str(cliHost) + ":" + str(cliPort))
responseData = self.returnSOA(msg)
if responseData is not None:
sock.sendto(responseData, (cliHost, cliPort))
def returnSOA(self, msg):
query = self.parse(msg)
response = self.createSOA(query)
if response.__class__.__name__ == "DNSRecord":
print("===============================")
print(response)
print("===============================")
return response.pack()
else:
return None
def parse(self, raw):
return DNSRecord.parse(raw)
def getQname(self, query):
return str(query.q.qname)
def createSOA(self, query):
responseData = query.reply()
soarr = RR( self.soaQname,
QTYPE.SOA,
ttl=self.ttl,
rdata=SOA( self.nsQname,
self.adminQname,
(20170101, 3600, 3600, 3600, self.minimum)
)
)
responseData.add_auth(soarr)
responseData.header.rcode = RCODE.NXDOMAIN
return responseData
if __name__ == '__main__':
srv = SOATestServer("192.168.1.2")
srv.run()