DNS Chat server

dnschatserver.py

import socket
from dnslib import RR, QTYPE, DNSRecord, DNSHeader, TXT
from time import time

DOMAIN = "REPLACE_WITH_YOUR_SUBDOMAIN"

def parse_response(data):
    temp = DNSRecord.parse(data)
    req = str(temp.q.qname)
    subdomain = req.replace(DOMAIN, "")
    return subdomain


if __name__ == "__main__":

    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind(("0.0.0.0", 53))
    print("starting the service..")
    while True:
        data, addr = sock.recvfrom(1024)
        rec = parse_response(data)
        epoch, msg = rec.split ("-|-")
        print("[{}]: {}".format(epoch, msg))
        msg = input("your reply: ")
        nonce = str(int(time())) + "-|-"
        temp = RR(DOMAIN, QTYPE.TXT, rdata=TXT(nonce + msg + DOMAIN))
        rec = DNSRecord()
        rec.add_question(DNSRecord.parse(data).q)
        rec.add_answer(temp)
        data = rec.pack()
        sock.sendto(data, addr)