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name	type	size	perms	modified	actions
[parent directory]
async_dns.py	file	874 B	0644	2024-02-18 18:35:12	edit
ddns.py	file	1,194 B	0644	2024-02-18 18:35:12	edit
ddr.py	file	950 B	0644	2024-02-18 18:35:12	edit
doh-json.py	file	3,001 B	0644	2024-02-18 18:35:12	edit
doh.py	file	534 B	0644	2024-02-18 18:35:12	edit
doq.py	file	3,143 B	0644	2024-02-18 18:35:12	edit
e164.py	file	115 B	0644	2024-02-18 18:35:12	edit
ecs.py	file	450 B	0644	2024-02-18 18:35:12	edit
edns.py	file	1,739 B	0644	2024-02-18 18:35:12	edit
edns_resolver.py	file	1,532 B	0644	2024-02-18 18:35:12	edit
mx.py	file	189 B	0644	2024-02-18 18:35:12	edit
name.py	file	356 B	0644	2024-02-18 18:35:12	edit
query_specific.py	file	1,655 B	0644	2024-02-18 18:35:12	edit
receive_notify.py	file	1,022 B	0644	2024-02-18 18:35:12	edit
reverse.py	file	1,389 B	0644	2024-02-18 18:35:12	edit
reverse_name.py	file	140 B	0644	2024-02-18 18:35:12	edit
send_notify.py	file	2,462 B	0644	2024-02-18 18:35:12	edit
wire_read_tcp.py	file	1,659 B	0644	2024-02-18 18:35:12	edit
xfr.py	file	340 B	0644	2024-02-18 18:35:12	edit
zonediff.py	file	12,173 B	0644	2024-02-18 18:35:12	edit

editing: edns_resolver.py

#!/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")))

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