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2062 lines (1812 loc) · 73.5 KB
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"""Unit tests for zeroconf._handlers"""
from __future__ import annotations
import asyncio
import logging
import os
import socket
import time
import unittest
import unittest.mock
from typing import cast
from unittest.mock import patch
import pytest
import zeroconf as r
from zeroconf import ServiceInfo, Zeroconf, const, current_time_millis
from zeroconf._handlers.multicast_outgoing_queue import (
MulticastOutgoingQueue,
construct_outgoing_multicast_answers,
)
from zeroconf._utils.time import millis_to_seconds
from zeroconf.asyncio import AsyncZeroconf
from . import _clear_cache, _inject_response, has_working_ipv6
log = logging.getLogger("zeroconf")
original_logging_level = logging.NOTSET
def setup_module():
global original_logging_level
original_logging_level = log.level
log.setLevel(logging.DEBUG)
def teardown_module():
if original_logging_level != logging.NOTSET:
log.setLevel(original_logging_level)
class TestRegistrar(unittest.TestCase):
def test_ttl(self):
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
nbr_answers = nbr_additionals = nbr_authorities = 0
def get_ttl(record_type):
if expected_ttl is not None:
return expected_ttl
if record_type in [const._TYPE_A, const._TYPE_SRV, const._TYPE_NSEC]:
return const._DNS_HOST_TTL
return const._DNS_OTHER_TTL
def _process_outgoing_packet(out):
"""Sends an outgoing packet."""
nonlocal nbr_answers, nbr_additionals, nbr_authorities
for answer, _ in out.answers:
nbr_answers += 1
assert answer.ttl == get_ttl(answer.type)
for answer in out.additionals:
nbr_additionals += 1
assert answer.ttl == get_ttl(answer.type)
for answer in out.authorities:
nbr_authorities += 1
assert answer.ttl == get_ttl(answer.type)
# register service with default TTL
expected_ttl = None
for _ in range(3):
_process_outgoing_packet(zc.generate_service_query(info))
zc.registry.async_add(info)
for _ in range(3):
_process_outgoing_packet(zc.generate_service_broadcast(info, None))
assert nbr_answers == 15 and nbr_additionals == 0 and nbr_authorities == 3
nbr_answers = nbr_additionals = nbr_authorities = 0
# query
query = r.DNSOutgoing(const._FLAGS_QR_QUERY | const._FLAGS_AA)
assert query.is_query() is True
query.add_question(r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.name, const._TYPE_SRV, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.name, const._TYPE_TXT, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.server or info.name, const._TYPE_A, const._CLASS_IN))
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
_process_outgoing_packet(construct_outgoing_multicast_answers(question_answers.mcast_aggregate))
# The additonals should all be suppressed since they are all in the answers section
# There will be one NSEC additional to indicate the lack of AAAA record
#
assert nbr_answers == 4 and nbr_additionals == 1 and nbr_authorities == 0
nbr_answers = nbr_additionals = nbr_authorities = 0
# unregister
expected_ttl = 0
zc.registry.async_remove(info)
for _ in range(3):
_process_outgoing_packet(zc.generate_service_broadcast(info, 0))
assert nbr_answers == 15 and nbr_additionals == 0 and nbr_authorities == 0
nbr_answers = nbr_additionals = nbr_authorities = 0
expected_ttl = None
for _ in range(3):
_process_outgoing_packet(zc.generate_service_query(info))
zc.registry.async_add(info)
# register service with custom TTL
expected_ttl = const._DNS_HOST_TTL * 2
assert expected_ttl != const._DNS_HOST_TTL
for _ in range(3):
_process_outgoing_packet(zc.generate_service_broadcast(info, expected_ttl))
assert nbr_answers == 15 and nbr_additionals == 0 and nbr_authorities == 3
nbr_answers = nbr_additionals = nbr_authorities = 0
# query
expected_ttl = None
query = r.DNSOutgoing(const._FLAGS_QR_QUERY | const._FLAGS_AA)
query.add_question(r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.name, const._TYPE_SRV, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.name, const._TYPE_TXT, const._CLASS_IN))
query.add_question(r.DNSQuestion(info.server or info.name, const._TYPE_A, const._CLASS_IN))
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
_process_outgoing_packet(construct_outgoing_multicast_answers(question_answers.mcast_aggregate))
# There will be one NSEC additional to indicate the lack of AAAA record
assert nbr_answers == 4 and nbr_additionals == 1 and nbr_authorities == 0
nbr_answers = nbr_additionals = nbr_authorities = 0
# unregister
expected_ttl = 0
zc.registry.async_remove(info)
for _ in range(3):
_process_outgoing_packet(zc.generate_service_broadcast(info, 0))
assert nbr_answers == 15 and nbr_additionals == 0 and nbr_authorities == 0
nbr_answers = nbr_additionals = nbr_authorities = 0
zc.close()
def test_name_conflicts(self):
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_homeassistant._tcp.local."
name = "Home"
registration_name = f"{name}.{type_}"
info = ServiceInfo(
type_,
name=registration_name,
server="random123.local.",
addresses=[socket.inet_pton(socket.AF_INET, "1.2.3.4")],
port=80,
properties={"version": "1.0"},
)
zc.register_service(info)
conflicting_info = ServiceInfo(
type_,
name=registration_name,
server="random456.local.",
addresses=[socket.inet_pton(socket.AF_INET, "4.5.6.7")],
port=80,
properties={"version": "1.0"},
)
with pytest.raises(r.NonUniqueNameException):
zc.register_service(conflicting_info)
zc.close()
def test_register_and_lookup_type_by_uppercase_name(self):
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_mylowertype._tcp.local."
name = "Home"
registration_name = f"{name}.{type_}"
info = ServiceInfo(
type_,
name=registration_name,
server="random123.local.",
addresses=[socket.inet_pton(socket.AF_INET, "1.2.3.4")],
port=80,
properties={"version": "1.0"},
)
zc.register_service(info)
_clear_cache(zc)
info = ServiceInfo(type_, registration_name)
info.load_from_cache(zc)
assert info.addresses == []
out = r.DNSOutgoing(const._FLAGS_QR_QUERY)
out.add_question(r.DNSQuestion(type_.upper(), const._TYPE_PTR, const._CLASS_IN))
zc.send(out)
time.sleep(1)
info = ServiceInfo(type_, registration_name)
info.load_from_cache(zc)
assert info.addresses == [socket.inet_pton(socket.AF_INET, "1.2.3.4")]
assert info.properties == {b"version": b"1.0"}
zc.close()
def test_ptr_optimization():
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
# register
zc.register_service(info)
# Verify we won't respond for 1s with the same multicast
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
query.add_question(r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN))
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
# Since we sent the PTR in the last second, they
# should end up in the delayed at least one second bucket
assert question_answers.mcast_aggregate_last_second
# Clear the cache to allow responding again
_clear_cache(zc)
# Verify we will now respond
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
query.add_question(r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN))
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate_last_second
has_srv = has_txt = has_a = False
nbr_additionals = 0
nbr_answers = len(question_answers.mcast_aggregate)
additionals = set().union(*question_answers.mcast_aggregate.values())
for answer in additionals:
nbr_additionals += 1
if answer.type == const._TYPE_SRV:
has_srv = True
elif answer.type == const._TYPE_TXT:
has_txt = True
elif answer.type == const._TYPE_A:
has_a = True
assert nbr_answers == 1 and nbr_additionals == 4
# There will be one NSEC additional to indicate the lack of AAAA record
assert has_srv and has_txt and has_a
# unregister
zc.unregister_service(info)
zc.close()
@unittest.skipIf(not has_working_ipv6(), "Requires IPv6")
@unittest.skipIf(os.environ.get("SKIP_IPV6"), "IPv6 tests disabled")
def test_any_query_for_ptr():
"""Test that queries for ANY will return PTR records and the response is aggregated."""
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_anyptr._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
ipv6_address = socket.inet_pton(socket.AF_INET6, "2001:db8::1")
info = ServiceInfo(type_, registration_name, 80, 0, 0, desc, server_name, addresses=[ipv6_address])
zc.registry.async_add(info)
_clear_cache(zc)
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(type_, const._TYPE_ANY, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
mcast_answers = list(question_answers.mcast_aggregate)
assert mcast_answers[0].name == type_
assert mcast_answers[0].alias == registration_name # type: ignore[attr-defined]
# unregister
zc.registry.async_remove(info)
zc.close()
@unittest.skipIf(not has_working_ipv6(), "Requires IPv6")
@unittest.skipIf(os.environ.get("SKIP_IPV6"), "IPv6 tests disabled")
def test_aaaa_query():
"""Test that queries for AAAA records work and should respond right away."""
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_knownaaaservice._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
ipv6_address = socket.inet_pton(socket.AF_INET6, "2001:db8::1")
info = ServiceInfo(type_, registration_name, 80, 0, 0, desc, server_name, addresses=[ipv6_address])
zc.registry.async_add(info)
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_AAAA, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
mcast_answers = list(question_answers.mcast_now)
assert mcast_answers[0].address == ipv6_address # type: ignore[attr-defined]
# unregister
zc.registry.async_remove(info)
zc.close()
@unittest.skipIf(not has_working_ipv6(), "Requires IPv6")
@unittest.skipIf(os.environ.get("SKIP_IPV6"), "IPv6 tests disabled")
def test_aaaa_query_upper_case():
"""Test that queries for AAAA records work and should respond right away with an upper case name."""
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_knownaaaservice._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
ipv6_address = socket.inet_pton(socket.AF_INET6, "2001:db8::1")
info = ServiceInfo(type_, registration_name, 80, 0, 0, desc, server_name, addresses=[ipv6_address])
zc.registry.async_add(info)
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name.upper(), const._TYPE_AAAA, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
mcast_answers = list(question_answers.mcast_now)
assert mcast_answers[0].address == ipv6_address # type: ignore[attr-defined]
# unregister
zc.registry.async_remove(info)
zc.close()
@unittest.skipIf(not has_working_ipv6(), "Requires IPv6")
@unittest.skipIf(os.environ.get("SKIP_IPV6"), "IPv6 tests disabled")
def test_a_and_aaaa_record_fate_sharing():
"""Test that queries for AAAA always return A records in the additionals and should respond right away."""
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_a-and-aaaa-service._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
ipv6_address = socket.inet_pton(socket.AF_INET6, "2001:db8::1")
ipv4_address = socket.inet_aton("10.0.1.2")
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
server_name,
addresses=[ipv6_address, ipv4_address],
)
aaaa_record = info.dns_addresses(version=r.IPVersion.V6Only)[0]
a_record = info.dns_addresses(version=r.IPVersion.V4Only)[0]
zc.registry.async_add(info)
# Test AAAA query
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_AAAA, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
additionals = set().union(*question_answers.mcast_now.values())
assert aaaa_record in question_answers.mcast_now
assert a_record in additionals
assert len(question_answers.mcast_now) == 1
assert len(additionals) == 1
# Test A query
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_A, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
additionals = set().union(*question_answers.mcast_now.values())
assert a_record in question_answers.mcast_now
assert aaaa_record in additionals
assert len(question_answers.mcast_now) == 1
assert len(additionals) == 1
# unregister
zc.registry.async_remove(info)
zc.close()
def test_unicast_response():
"""Ensure we send a unicast response when the source port is not the MDNS port."""
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
# register
zc.registry.async_add(info)
_clear_cache(zc)
# query
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
query.add_question(r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN))
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], True
)
assert question_answers
for answers in (question_answers.ucast, question_answers.mcast_aggregate):
has_srv = has_txt = has_a = has_aaaa = has_nsec = False
nbr_additionals = 0
nbr_answers = len(answers)
additionals = set().union(*answers.values())
for answer in additionals:
nbr_additionals += 1
if answer.type == const._TYPE_SRV:
has_srv = True
elif answer.type == const._TYPE_TXT:
has_txt = True
elif answer.type == const._TYPE_A:
has_a = True
elif answer.type == const._TYPE_AAAA:
has_aaaa = True
elif answer.type == const._TYPE_NSEC:
has_nsec = True
# There will be one NSEC additional to indicate the lack of AAAA record
assert nbr_answers == 1 and nbr_additionals == 4
assert has_srv and has_txt and has_a and has_nsec
assert not has_aaaa
# unregister
zc.registry.async_remove(info)
zc.close()
@pytest.mark.asyncio
async def test_probe_answered_immediately():
"""Verify probes are responded to immediately."""
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info)
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
query.add_question(question)
query.add_authorative_answer(info.dns_pointer())
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
assert question_answers.mcast_now
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True
query.add_question(question)
query.add_authorative_answer(info.dns_pointer())
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert question_answers.ucast
assert question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
zc.close()
@pytest.mark.asyncio
async def test_probe_answered_immediately_with_uppercase_name():
"""Verify probes are responded to immediately with an uppercase name."""
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info)
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type.upper(), const._TYPE_PTR, const._CLASS_IN)
query.add_question(question)
query.add_authorative_answer(info.dns_pointer())
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
assert question_answers.mcast_now
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True
query.add_question(question)
query.add_authorative_answer(info.dns_pointer())
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert question_answers.ucast
assert question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
zc.close()
def test_qu_response():
"""Handle multicast incoming with the QU bit set."""
# instantiate a zeroconf instance
zc = Zeroconf(interfaces=["127.0.0.1"])
# service definition
type_ = "_test-srvc-type._tcp.local."
other_type_ = "_notthesame._tcp.local."
name = "xxxyyy"
registration_name = f"{name}.{type_}"
registration_name2 = f"{name}.{other_type_}"
desc = {"path": "/~paulsm/"}
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
"ash-2.local.",
addresses=[socket.inet_aton("10.0.1.2")],
)
info2 = ServiceInfo(
other_type_,
registration_name2,
80,
0,
0,
desc,
"ash-other.local.",
addresses=[socket.inet_aton("10.0.4.2")],
)
# register
zc.register_service(info)
def _validate_complete_response(answers):
has_srv = has_txt = has_a = has_aaaa = has_nsec = False
nbr_answers = len(answers)
additionals = set().union(*answers.values())
nbr_additionals = len(additionals)
for answer in additionals:
if answer.type == const._TYPE_SRV:
has_srv = True
elif answer.type == const._TYPE_TXT:
has_txt = True
elif answer.type == const._TYPE_A:
has_a = True
elif answer.type == const._TYPE_AAAA:
has_aaaa = True
elif answer.type == const._TYPE_NSEC:
has_nsec = True
assert nbr_answers == 1 and nbr_additionals == 4
assert has_srv and has_txt and has_a and has_nsec
assert not has_aaaa
# With QU should respond to only unicast when the answer has been recently multicast
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True # Set the QU bit
assert question.unicast is True
query.add_question(question)
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
_validate_complete_response(question_answers.ucast)
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
_clear_cache(zc)
# With QU should respond to only multicast since the response hasn't been seen since 75% of the ttl
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True # Set the QU bit
assert question.unicast is True
query.add_question(question)
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate
_validate_complete_response(question_answers.mcast_now)
# With QU set and an authoritative answer (probe) should respond to both unitcast
# and multicast since the response hasn't been seen since 75% of the ttl
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True # Set the QU bit
assert question.unicast is True
query.add_question(question)
query.add_authorative_answer(info2.dns_pointer())
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
_validate_complete_response(question_answers.ucast)
_validate_complete_response(question_answers.mcast_now)
_inject_response(
zc,
r.DNSIncoming(construct_outgoing_multicast_answers(question_answers.mcast_now).packets()[0]),
)
# With the cache repopulated; should respond to only unicast when the answer has been recently multicast
query = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(info.type, const._TYPE_PTR, const._CLASS_IN)
question.unicast = True # Set the QU bit
assert question.unicast is True
query.add_question(question)
question_answers = zc.query_handler.async_response(
[r.DNSIncoming(packet) for packet in query.packets()], False
)
assert question_answers
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
_validate_complete_response(question_answers.ucast)
# unregister
zc.unregister_service(info)
zc.close()
def test_known_answer_supression():
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_knownanswersv8._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
server_name,
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info)
now = current_time_millis()
_clear_cache(zc)
# Test PTR suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(type_, const._TYPE_PTR, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(type_, const._TYPE_PTR, const._CLASS_IN)
generated.add_question(question)
generated.add_answer_at_time(info.dns_pointer(), now)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# Test A suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_A, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_A, const._CLASS_IN)
generated.add_question(question)
for dns_address in info.dns_addresses():
generated.add_answer_at_time(dns_address, now)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# Test NSEC record returned when there is no AAAA record and we expectly ask
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(server_name, const._TYPE_AAAA, const._CLASS_IN)
generated.add_question(question)
for dns_address in info.dns_addresses():
generated.add_answer_at_time(dns_address, now)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
expected_nsec_record = cast(r.DNSNsec, next(iter(question_answers.mcast_now)))
assert const._TYPE_A not in expected_nsec_record.rdtypes
assert const._TYPE_AAAA in expected_nsec_record.rdtypes
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# Test SRV suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(registration_name, const._TYPE_SRV, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(registration_name, const._TYPE_SRV, const._CLASS_IN)
generated.add_question(question)
generated.add_answer_at_time(info.dns_service(), now)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# Test TXT suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(registration_name, const._TYPE_TXT, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(registration_name, const._TYPE_TXT, const._CLASS_IN)
generated.add_question(question)
generated.add_answer_at_time(info.dns_text(), now)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# unregister
zc.registry.async_remove(info)
zc.close()
def test_multi_packet_known_answer_supression():
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_handlermultis._tcp.local."
name = "knownname"
name2 = "knownname2"
name3 = "knownname3"
registration_name = f"{name}.{type_}"
registration2_name = f"{name2}.{type_}"
registration3_name = f"{name3}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
server_name2 = "ash-3.local."
server_name3 = "ash-4.local."
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
server_name,
addresses=[socket.inet_aton("10.0.1.2")],
)
info2 = ServiceInfo(
type_,
registration2_name,
80,
0,
0,
desc,
server_name2,
addresses=[socket.inet_aton("10.0.1.2")],
)
info3 = ServiceInfo(
type_,
registration3_name,
80,
0,
0,
desc,
server_name3,
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info)
zc.registry.async_add(info2)
zc.registry.async_add(info3)
now = current_time_millis()
_clear_cache(zc)
# Test PTR suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(type_, const._TYPE_PTR, const._CLASS_IN)
generated.add_question(question)
for _ in range(1000):
# Add so many answers we end up with another packet
generated.add_answer_at_time(info.dns_pointer(), now)
generated.add_answer_at_time(info2.dns_pointer(), now)
generated.add_answer_at_time(info3.dns_pointer(), now)
packets = generated.packets()
assert len(packets) > 1
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert not question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
# unregister
zc.registry.async_remove(info)
zc.registry.async_remove(info2)
zc.registry.async_remove(info3)
zc.close()
def test_known_answer_supression_service_type_enumeration_query():
zc = Zeroconf(interfaces=["127.0.0.1"])
type_ = "_otherknown._tcp.local."
name = "knownname"
registration_name = f"{name}.{type_}"
desc = {"path": "/~paulsm/"}
server_name = "ash-2.local."
info = ServiceInfo(
type_,
registration_name,
80,
0,
0,
desc,
server_name,
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info)
type_2 = "_otherknown2._tcp.local."
name = "knownname"
registration_name2 = f"{name}.{type_2}"
desc = {"path": "/~paulsm/"}
server_name2 = "ash-3.local."
info2 = ServiceInfo(
type_2,
registration_name2,
80,
0,
0,
desc,
server_name2,
addresses=[socket.inet_aton("10.0.1.2")],
)
zc.registry.async_add(info2)
now = current_time_millis()
_clear_cache(zc)
# Test PTR suppression
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(const._SERVICE_TYPE_ENUMERATION_NAME, const._TYPE_PTR, const._CLASS_IN)
generated.add_question(question)
packets = generated.packets()
question_answers = zc.query_handler.async_response([r.DNSIncoming(packet) for packet in packets], False)
assert question_answers
assert not question_answers.ucast
assert not question_answers.mcast_now
assert question_answers.mcast_aggregate
assert not question_answers.mcast_aggregate_last_second
generated = r.DNSOutgoing(const._FLAGS_QR_QUERY)
question = r.DNSQuestion(const._SERVICE_TYPE_ENUMERATION_NAME, const._TYPE_PTR, const._CLASS_IN)
generated.add_question(question)
generated.add_answer_at_time(
r.DNSPointer(
const._SERVICE_TYPE_ENUMERATION_NAME,
const._TYPE_PTR,
const._CLASS_IN,
const._DNS_OTHER_TTL,
type_,
),
now,
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