#!/usr/bin/env python3
import dns.edns
import dns.message
import dns.query

# This example demonstrates how to use the EDNS client subnet option

ADDRESS = "0.0.0.0"  # replace this with the address you want to check
PREFIX = 0  # replace this with a prefix length (typically 24 for IPv4)

ecs = dns.edns.ECSOption(ADDRESS, PREFIX)
q = dns.message.make_query("www.google.com", "A", use_edns=0, options=[ecs])
r = dns.query.udp(q, "8.8.8.8")
print(r)