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test_zeroconf.py
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271 lines (209 loc) · 8.57 KB
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
""" Unit tests for zeroconf.py """
import logging
import socket
import struct
import time
import unittest
from threading import Event
from six import indexbytes
from six.moves import xrange
import zeroconf as r
from zeroconf import (
DNSText,
ServiceBrowser,
ServiceInfo,
ServiceStateChange,
Zeroconf,
)
log = logging.getLogger('zeroconf')
original_logging_level = [None]
def setup_module():
original_logging_level[0] = log.level
log.setLevel(logging.DEBUG)
def teardown_module():
log.setLevel(original_logging_level[0])
class PacketGeneration(unittest.TestCase):
def test_parse_own_packet_simple(self):
generated = r.DNSOutgoing(0)
r.DNSIncoming(generated.packet())
def test_parse_own_packet_simple_unicast(self):
generated = r.DNSOutgoing(0, 0)
r.DNSIncoming(generated.packet())
def test_parse_own_packet_flags(self):
generated = r.DNSOutgoing(r._FLAGS_QR_QUERY)
r.DNSIncoming(generated.packet())
def test_parse_own_packet_question(self):
generated = r.DNSOutgoing(r._FLAGS_QR_QUERY)
generated.add_question(r.DNSQuestion("testname.local.", r._TYPE_SRV,
r._CLASS_IN))
r.DNSIncoming(generated.packet())
def test_match_question(self):
generated = r.DNSOutgoing(r._FLAGS_QR_QUERY)
question = r.DNSQuestion("testname.local.", r._TYPE_SRV, r._CLASS_IN)
generated.add_question(question)
parsed = r.DNSIncoming(generated.packet())
self.assertEqual(len(generated.questions), 1)
self.assertEqual(len(generated.questions), len(parsed.questions))
self.assertEqual(question, parsed.questions[0])
class PacketForm(unittest.TestCase):
def test_transaction_id(self):
"""ID must be zero in a DNS-SD packet"""
generated = r.DNSOutgoing(r._FLAGS_QR_QUERY)
bytes = generated.packet()
id = indexbytes(bytes, 0) << 8 | indexbytes(bytes, 1)
self.assertEqual(id, 0)
def test_query_header_bits(self):
generated = r.DNSOutgoing(r._FLAGS_QR_QUERY)
bytes = generated.packet()
flags = indexbytes(bytes, 2) << 8 | indexbytes(bytes, 3)
self.assertEqual(flags, 0x0)
def test_response_header_bits(self):
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
bytes = generated.packet()
flags = indexbytes(bytes, 2) << 8 | indexbytes(bytes, 3)
self.assertEqual(flags, 0x8000)
def test_numbers(self):
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
bytes = generated.packet()
(numQuestions, numAnswers, numAuthorities,
numAdditionals) = struct.unpack('!4H', bytes[4:12])
self.assertEqual(numQuestions, 0)
self.assertEqual(numAnswers, 0)
self.assertEqual(numAuthorities, 0)
self.assertEqual(numAdditionals, 0)
def test_numbers_questions(self):
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
question = r.DNSQuestion("testname.local.", r._TYPE_SRV, r._CLASS_IN)
for i in xrange(10):
generated.add_question(question)
bytes = generated.packet()
(numQuestions, numAnswers, numAuthorities,
numAdditionals) = struct.unpack('!4H', bytes[4:12])
self.assertEqual(numQuestions, 10)
self.assertEqual(numAnswers, 0)
self.assertEqual(numAuthorities, 0)
self.assertEqual(numAdditionals, 0)
class Names(unittest.TestCase):
def test_long_name(self):
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
question = r.DNSQuestion("this.is.a.very.long.name.with.lots.of.parts.in.it.local.",
r._TYPE_SRV, r._CLASS_IN)
generated.add_question(question)
r.DNSIncoming(generated.packet())
def test_exceedingly_long_name(self):
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
name = "%slocal." % ("part." * 1000)
question = r.DNSQuestion(name, r._TYPE_SRV, r._CLASS_IN)
generated.add_question(question)
r.DNSIncoming(generated.packet())
def test_exceedingly_long_name_part(self):
name = "%s.local." % ("a" * 1000)
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
question = r.DNSQuestion(name, r._TYPE_SRV, r._CLASS_IN)
generated.add_question(question)
self.assertRaises(r.NamePartTooLongException, generated.packet)
def test_same_name(self):
name = "paired.local."
generated = r.DNSOutgoing(r._FLAGS_QR_RESPONSE)
question = r.DNSQuestion(name, r._TYPE_SRV, r._CLASS_IN)
generated.add_question(question)
generated.add_question(question)
r.DNSIncoming(generated.packet())
class Framework(unittest.TestCase):
def test_launch_and_close(self):
rv = r.Zeroconf()
rv.close()
class Exceptions(unittest.TestCase):
def test_bad_service_info_name(self):
browser = Zeroconf()
self.assertRaises(r.BadTypeInNameException,
browser.get_service_info, "type", "type_not")
browser.close()
class Listener(unittest.TestCase):
def test_integration_with_listener_class(self):
service_added = Event()
service_removed = Event()
type_ = "_http._tcp.local."
name = "xxxyyy"
registration_name = "%s.%s" % (name, type_)
class MyListener(object):
def add_service(self, zeroconf, type, name):
zeroconf.get_service_info(type, name)
service_added.set()
def remove_service(self, zeroconf, type, name):
service_removed.set()
zeroconf_browser = Zeroconf()
zeroconf_browser.add_service_listener(type_, MyListener())
properties = dict(
prop_none=None,
prop_string=b'a_prop',
prop_float=1.0,
prop_blank=b'a blanked string',
prop_true=1,
prop_false=0,
)
zeroconf_registrar = Zeroconf()
desc = {'path': '/~paulsm/'}
desc.update(properties)
info = ServiceInfo(
type_, registration_name,
socket.inet_aton("10.0.1.2"), 80, 0, 0,
desc, "ash-2.local.")
zeroconf_registrar.register_service(info)
try:
service_added.wait(1)
assert service_added.is_set()
# short pause to allow multicast timers to expire
time.sleep(2)
# clear the answer cache to force query
for record in zeroconf_browser.cache.entries():
zeroconf_browser.cache.remove(record)
# get service info without answer cache
info = zeroconf_browser.get_service_info(type_, registration_name)
assert info.properties[b'prop_none'] is False
assert info.properties[b'prop_string'] == properties['prop_string']
assert info.properties[b'prop_float'] is False
assert info.properties[b'prop_blank'] == properties['prop_blank']
assert info.properties[b'prop_true'] is True
assert info.properties[b'prop_false'] is False
zeroconf_registrar.unregister_service(info)
service_removed.wait(1)
assert service_removed.is_set()
finally:
zeroconf_registrar.close()
zeroconf_browser.close()
def test_integration():
service_added = Event()
service_removed = Event()
type_ = "_http._tcp.local."
registration_name = "xxxyyy.%s" % type_
def on_service_state_change(zeroconf, service_type, state_change, name):
if name == registration_name:
if state_change is ServiceStateChange.Added:
service_added.set()
elif state_change is ServiceStateChange.Removed:
service_removed.set()
zeroconf_browser = Zeroconf()
browser = ServiceBrowser(zeroconf_browser, type_, [on_service_state_change])
zeroconf_registrar = Zeroconf()
desc = {'path': '/~paulsm/'}
info = ServiceInfo(
type_, registration_name,
socket.inet_aton("10.0.1.2"), 80, 0, 0,
desc, "ash-2.local.")
zeroconf_registrar.register_service(info)
try:
service_added.wait(1)
assert service_added.is_set()
# Don't remove service, allow close() to cleanup
finally:
zeroconf_registrar.close()
browser.cancel()
zeroconf_browser.close()
def test_dnstext_repr_works():
# There was an issue on Python 3 that prevented DNSText's repr
# from working when the text was longer than 10 bytes
text = DNSText('irrelevant', None, 0, 0, b'12345678901')
repr(text)