#!/usr/bin/env python3 import dns.edns import dns.message import dns.query import dns.resolver n = "." t = dns.rdatatype.SOA l = "google.com" # Address of l.root-servers.net, '199.7.83.42' i = "ns1.isc.org" # Address of ns1.isc.org, for COOKIEs, '149.20.1.73' o_list = [] # A query without options o_list.append((l, dict())) # The same query, but with empty options list o_list.append((l, dict(options=[]))) # Use use_edns() to specify EDNS0 options, such as buffer size o_list.append((l, dict(payload=2000))) # With an NSID option, but with use_edns() to specify the options edns_kwargs = dict( edns=0, options=[dns.edns.GenericOption(dns.edns.OptionType.NSID, b"")] ) o_list.append((l, edns_kwargs)) # With a COOKIE o_list.append( ( i, dict( options=[ dns.edns.GenericOption( dns.edns.OptionType.COOKIE, b"0xfe11ac99bebe3322" ) ] ), ) ) # With an ECS option using cloudflare dns address o_list.append((l, dict(options=[dns.edns.ECSOption("1.1.1.1", 24)]))) # With an ECS option using the current machine address import urllib.request external_ip = urllib.request.urlopen("https://ident.me").read().decode("utf8") o_list.append((l, dict(options=[dns.edns.ECSOption(external_ip, 24)]))) aresolver = dns.resolver.Resolver() for addr, edns_kwargs in o_list: if edns_kwargs: aresolver.use_edns(**edns_kwargs) aresolver.nameservers = ["8.8.8.8"] print(list(aresolver.resolve(addr, "A")))