247 lines
8.1 KiB
Python
247 lines
8.1 KiB
Python
"""Tests for network connections"""
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import logging
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import os
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import random
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import unittest
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import tempfile
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import time
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from contextlib import contextmanager
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from minode import connection, main, shared
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from minode.listener import Listener
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from minode.manager import Manager
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from .test_process import TestProcessProto
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logging.basicConfig(
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level=logging.INFO,
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format='[%(asctime)s] [%(levelname)s] %(message)s')
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@contextmanager
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def time_offset(offset):
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"""
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Replace time.time() by a mock returning a constant value
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with given offset from current time.
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"""
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started = time.time()
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time_call = time.time
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try:
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time.time = lambda: started + offset
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yield time_call
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finally:
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time.time = time_call
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@contextmanager
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def run_listener(host='localhost', port=8444):
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"""
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Run the Listener with zero connection limit and
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reset variables in shared after its stop.
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"""
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connection_limit = shared.connection_limit
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shared.connection_limit = 0
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try:
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listener = Listener(host, port)
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listener.start()
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yield listener
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except OSError:
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yield
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finally:
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shared.connection_limit = connection_limit
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shared.connections.clear()
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shared.shutting_down = True
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time.sleep(1)
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class TestNetwork(unittest.TestCase):
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"""Test case starting connections"""
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@classmethod
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def setUpClass(cls):
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shared.data_directory = tempfile.gettempdir()
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def setUp(self):
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shared.core_nodes.clear()
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shared.unchecked_node_pool.clear()
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shared.objects = {}
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try:
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os.remove(os.path.join(shared.data_directory, 'objects.pickle'))
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except FileNotFoundError:
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pass
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def _make_initial_nodes(self):
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Manager.load_data()
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self.assertGreaterEqual(len(shared.core_nodes), 3)
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main.bootstrap_from_dns()
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self.assertGreaterEqual(len(shared.unchecked_node_pool), 3)
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def test_connection(self):
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"""Check a normal connection - should receive objects"""
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self._make_initial_nodes()
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started = time.time()
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nodes = list(shared.core_nodes.union(shared.unchecked_node_pool))
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random.shuffle(nodes)
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for node in nodes:
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# unknown = node not in shared.node_pool
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# self.assertTrue(unknown)
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unknown = True
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shared.node_pool.discard(node)
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c = connection.Connection(*node)
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c.start()
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connection_started = time.time()
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while c.status not in ('disconnected', 'failed'):
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# The addr of established connection is added to nodes pool
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if unknown and c.status == 'fully_established':
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unknown = False
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self.assertIn(node, shared.node_pool)
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if shared.objects or time.time() - connection_started > 90:
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c.status = 'disconnecting'
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if time.time() - started > 300:
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c.status = 'disconnecting'
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self.fail('Failed to receive an object in %s sec' % 300)
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time.sleep(0.2)
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if shared.objects: # got some objects
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break
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else:
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self.fail('Failed to establish a proper connection')
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def test_time_offset(self):
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"""Assert the network bans for large time offset"""
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def try_connect(nodes, timeout, call):
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started = call()
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for node in nodes:
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c = connection.Connection(*node)
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c.start()
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while call() < started + timeout:
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if c.status == 'fully_established':
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return 'Established a connection'
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if c.status in ('disconnected', 'failed'):
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break
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time.sleep(0.2)
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else:
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return 'Spent too much time trying to connect'
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def time_offset_bad_connections(nodes, offset):
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"""Spoof time.time and open connections with given time offset"""
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with time_offset(offset) as time_call:
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result = try_connect(nodes, 200, time_call)
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if result:
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self.fail(result)
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def time_offset_good_connections(nodes):
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"""Connect to at least one node with acceptable time offset"""
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with time_offset(-3500) as time_call:
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result = try_connect(nodes, 200, time_call)
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if not result:
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self.fail('Failed to connect with acceptable time offset')
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self._make_initial_nodes()
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nodes = random.sample(
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tuple(shared.core_nodes.union(shared.unchecked_node_pool)), 5)
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time_offset_bad_connections(nodes, 4000)
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time_offset_bad_connections(nodes, -4000)
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time_offset_good_connections(nodes)
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class TestConnection(TestProcessProto):
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"""
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A base class for test cases using a process with --trusted-peer
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to connect to a listener instance.
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"""
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_process_cmd = ['minode', '--trusted-peer', '127.0.0.1', '-p', '8448']
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def setUp(self):
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shared.shutting_down = False
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@classmethod
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def tearDownClass(cls):
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super().tearDownClass()
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shared.shutting_down = False
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class TestListener(TestConnection):
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"""A separate test case for Listener"""
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def test_listener(self):
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"""Start Listener and try to connect"""
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with run_listener() as listener:
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if not listener:
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self.fail('Failed to start listener')
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c = connection.Connection('127.0.0.1', 8444)
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shared.connections.add(c)
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for _ in range(30):
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if len(shared.connections) > 1:
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self.fail('The listener ignored connection limit')
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time.sleep(0.5)
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shared.connection_limit = 2
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c.start()
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started = time.time()
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while c.status not in ('disconnected', 'failed'):
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if c.status == 'fully_established':
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self.fail('Connected to itself')
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if time.time() - started > 90:
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c.status = 'disconnecting'
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time.sleep(0.2)
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server = None
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started = time.time()
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while not server:
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time.sleep(0.2)
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if time.time() - started > 90:
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self.fail('Failed to establish the connection')
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for c in shared.connections:
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if c.status == 'fully_established':
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server = c
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self.assertTrue(server.server)
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while not self.process.connections():
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time.sleep(0.2)
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if time.time() - started > 90:
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self.fail('Failed to connect to listener')
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client = self.process.connections()[0]
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self.assertEqual(client.raddr[0], '127.0.0.1')
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self.assertEqual(client.raddr[1], 8444)
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self.assertEqual(server.host, client.laddr[0])
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# self.assertEqual(server.port, client.laddr[1])
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server.status = 'disconnecting'
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self.assertFalse(listener.is_alive())
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def test_listener_timeoffset(self):
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"""Run listener with a large time offset - shouldn't connect"""
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with time_offset(4000):
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with run_listener() as listener:
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if not listener:
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self.fail('Failed to start listener')
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shared.connection_limit = 2
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for _ in range(30):
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for c in shared.connections:
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if c.status == 'fully_established':
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self.fail('Established a connection')
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time.sleep(0.5)
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class TestBehavior(TestConnection):
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"""Test behavior of the process with --trusted-peer"""
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def test_advertisement(self):
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"""Ensure it doesn't advertise 127.0.0.1"""
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started = time.time()
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with run_listener() as _:
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while time.time() - started < 30:
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if ('127.0.0.1', 8448) in shared.unchecked_node_pool:
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self.fail('Got 127.0.0.1 in an addr message')
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time.sleep(1)
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