import ipaddress

import random

import socket

from functools import lru_cache

from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set, Union, cast

from .._dns import (

return info.name[: -len(service_name) - 1]

_cached_ip_addresses = lru_cache(maxsize=256)(ipaddress.ip_address)

class ServiceInfo(RecordUpdateListener):

"""Service information.

for address in value:

try:

addr = ipaddress.ip_address(address)

addr = _cached_ip_addresses(address)

except ValueError:

raise TypeError(

"Addresses must either be IPv4 or IPv6 strings, bytes, or integers;"

return self.parsed_addresses(version)

def is_link_local(addr_str: str) -> Any:

addr = ipaddress.ip_address(addr_str)

addr = _cached_ip_addresses(addr_str)

return addr.version == 6 and addr.is_link_local

ll_addrs = list(filter(is_link_local, self.parsed_addresses(version)))

if record.key != self.server_key:

return

try:

ip_addr = ipaddress.ip_address(record.address)

ip_addr = _cached_ip_addresses(record.address)

except ValueError as ex:

log.warning("Encountered invalid address while processing %s: %s", record, ex)

return