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PATH: usr / share / doc / python3-dns / examples

#!/usr/bin/env python3

# This is just a toy, real code would check that the received message
# really was a NOTIFY, and otherwise handle errors.

import socket

import dns.flags
import dns.message
import dns.rdataclass
import dns.rdatatype
import dns.name

from typing import cast

address = "127.0.0.1"
port = 53535

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((address, port))
while True:
    (wire, address) = s.recvfrom(512)
    notify = dns.message.from_wire(wire)

try:
        soa = notify.find_rrset(
            notify.answer, notify.question[0].name, dns.rdataclass.IN, dns.rdatatype.SOA
        )

# Do something with the SOA RR here
        print("The serial number for", soa.name, "is", soa[0].serial)
    except KeyError:
        # No SOA RR in the answer section.
        pass

response = dns.message.make_response(notify)  # type: dns.message.Message
    response.flags |= dns.flags.AA
    wire = response.to_wire(cast(dns.name.Name, response))
    s.sendto(wire, address)

[-] xfr.py [edit]
[-] receive_notify.py [edit]
[-] async_dns.py [edit]
[-] doh.py [edit]
[-] doh-json.py [edit]
[-] reverse.py [edit]
[-] mx.py [edit]
[-] zonediff.py [edit]
[-] reverse_name.py [edit]
[-] edns.py [edit]
[-] doq.py [edit]
[-] query_specific.py [edit]
[-] name.py [edit]
[-] e164.py [edit]
[-] wire_read_tcp.py [edit]
[-] ddns.py [edit]
[-] ddr.py [edit]
[-] send_notify.py [edit]
[-] ecs.py [edit]
[+] ..
[-] edns_resolver.py [edit]