329 lines
16 KiB
Python
329 lines
16 KiB
Python
import asyncio
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from lbry.testcase import AsyncioTestCase
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from tests import dht_mocks
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from lbry.dht import constants
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from lbry.dht.node import Node
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from lbry.dht.peer import PeerManager, make_kademlia_peer
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expected_ranges = [
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(
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0,
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2462625387274654950767440006258975862817483704404090416746768337765357610718575663213391640930307227550414249394176
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),
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(
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2462625387274654950767440006258975862817483704404090416746768337765357610718575663213391640930307227550414249394176,
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4925250774549309901534880012517951725634967408808180833493536675530715221437151326426783281860614455100828498788352
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),
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(
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4925250774549309901534880012517951725634967408808180833493536675530715221437151326426783281860614455100828498788352,
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9850501549098619803069760025035903451269934817616361666987073351061430442874302652853566563721228910201656997576704
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),
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(
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9850501549098619803069760025035903451269934817616361666987073351061430442874302652853566563721228910201656997576704,
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19701003098197239606139520050071806902539869635232723333974146702122860885748605305707133127442457820403313995153408
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),
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(
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19701003098197239606139520050071806902539869635232723333974146702122860885748605305707133127442457820403313995153408,
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39402006196394479212279040100143613805079739270465446667948293404245721771497210611414266254884915640806627990306816
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)
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]
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class TestRouting(AsyncioTestCase):
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async def test_fill_one_bucket(self):
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loop = asyncio.get_event_loop()
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peer_addresses = [
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(constants.generate_id(1), '1.2.3.1'),
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(constants.generate_id(2), '1.2.3.2'),
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(constants.generate_id(3), '1.2.3.3'),
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(constants.generate_id(4), '1.2.3.4'),
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(constants.generate_id(5), '1.2.3.5'),
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(constants.generate_id(6), '1.2.3.6'),
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(constants.generate_id(7), '1.2.3.7'),
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(constants.generate_id(8), '1.2.3.8'),
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(constants.generate_id(9), '1.2.3.9'),
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]
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with dht_mocks.mock_network_loop(loop):
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nodes = {
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i: Node(loop, PeerManager(loop), node_id, 4444, 4444, 3333, address)
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for i, (node_id, address) in enumerate(peer_addresses)
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}
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node_1 = nodes[0]
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contact_cnt = 0
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for i in range(1, len(peer_addresses)):
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self.assertEqual(len(node_1.protocol.routing_table.get_peers()), contact_cnt)
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node = nodes[i]
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peer = make_kademlia_peer(
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node.protocol.node_id, node.protocol.external_ip,
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udp_port=node.protocol.udp_port
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)
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added = await node_1.protocol._add_peer(peer)
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self.assertTrue(added)
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contact_cnt += 1
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self.assertEqual(len(node_1.protocol.routing_table.get_peers()), 8)
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self.assertEqual(node_1.protocol.routing_table.buckets_with_contacts(), 1)
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for node in nodes.values():
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node.protocol.stop()
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async def test_cant_add_peer_without_a_node_id_gracefully(self):
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loop = asyncio.get_event_loop()
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node = Node(loop, PeerManager(loop), constants.generate_id(), 4444, 4444, 3333, '1.2.3.4')
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bad_peer = make_kademlia_peer(None, '1.2.3.4', 5555)
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with self.assertLogs(level='WARNING') as logged:
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self.assertFalse(await node.protocol._add_peer(bad_peer))
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self.assertEqual(1, len(logged.output))
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self.assertTrue(logged.output[0].endswith('Tried adding a peer with no node id!'))
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async def test_split_buckets(self):
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loop = asyncio.get_event_loop()
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peer_addresses = [
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(constants.generate_id(1), '1.2.3.1'),
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]
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for i in range(2, 200):
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peer_addresses.append((constants.generate_id(i), f'1.2.3.{i}'))
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with dht_mocks.mock_network_loop(loop):
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nodes = {
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i: Node(loop, PeerManager(loop), node_id, 4444, 4444, 3333, address)
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for i, (node_id, address) in enumerate(peer_addresses)
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}
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node_1 = nodes[0]
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for i in range(1, len(peer_addresses)):
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node = nodes[i]
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peer = make_kademlia_peer(
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node.protocol.node_id, node.protocol.external_ip,
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udp_port=node.protocol.udp_port
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)
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# set all of the peers to good (as to not attempt pinging stale ones during split)
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node_1.protocol.peer_manager.report_last_replied(peer.address, peer.udp_port)
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node_1.protocol.peer_manager.report_last_replied(peer.address, peer.udp_port)
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await node_1.protocol._add_peer(peer)
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# check that bucket 0 is always the one covering the local node id
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self.assertEqual(True, node_1.protocol.routing_table.buckets[0].key_in_range(node_1.protocol.node_id))
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self.assertEqual(40, len(node_1.protocol.routing_table.get_peers()))
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self.assertEqual(len(expected_ranges), len(node_1.protocol.routing_table.buckets))
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covered = 0
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for (expected_min, expected_max), bucket in zip(expected_ranges, node_1.protocol.routing_table.buckets):
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self.assertEqual(expected_min, bucket.range_min)
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self.assertEqual(expected_max, bucket.range_max)
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covered += bucket.range_max - bucket.range_min
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self.assertEqual(2**384, covered)
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for node in nodes.values():
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node.stop()
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# from binascii import hexlify, unhexlify
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#
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# from twisted.trial import unittest
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# from twisted.internet import defer
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# from lbry.dht import constants
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# from lbry.dht.routingtable import TreeRoutingTable
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# from lbry.dht.contact import ContactManager
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# from lbry.dht.distance import Distance
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# from lbry.utils import generate_id
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#
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#
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# class FakeRPCProtocol:
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# """ Fake RPC protocol; allows lbry.dht.contact.Contact objects to "send" RPCs """
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# def sendRPC(self, *args, **kwargs):
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# return defer.succeed(None)
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#
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#
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# class TreeRoutingTableTest(unittest.TestCase):
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# """ Test case for the RoutingTable class """
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# def setUp(self):
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# self.contact_manager = ContactManager()
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# self.nodeID = generate_id(b'node1')
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# self.protocol = FakeRPCProtocol()
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# self.routingTable = TreeRoutingTable(self.nodeID)
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#
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# def test_distance(self):
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# """ Test to see if distance method returns correct result"""
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# d = Distance(bytes((170,) * 48))
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# result = d(bytes((85,) * 48))
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# expected = int(hexlify(bytes((255,) * 48)), 16)
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# self.assertEqual(result, expected)
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#
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# @defer.inlineCallbacks
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# def test_add_contact(self):
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# """ Tests if a contact can be added and retrieved correctly """
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# # Create the contact
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# contact_id = generate_id(b'node2')
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# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
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# # Now add it...
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# yield self.routingTable.addContact(contact)
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# # ...and request the closest nodes to it (will retrieve it)
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# closest_nodes = self.routingTable.findCloseNodes(contact_id)
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# self.assertEqual(len(closest_nodes), 1)
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# self.assertIn(contact, closest_nodes)
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#
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# @defer.inlineCallbacks
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# def test_get_contact(self):
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# """ Tests if a specific existing contact can be retrieved correctly """
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# contact_id = generate_id(b'node2')
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# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
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# # Now add it...
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# yield self.routingTable.addContact(contact)
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# # ...and get it again
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# same_contact = self.routingTable.getContact(contact_id)
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# self.assertEqual(contact, same_contact, 'getContact() should return the same contact')
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#
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# @defer.inlineCallbacks
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# def test_add_parent_node_as_contact(self):
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# """
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# Tests the routing table's behaviour when attempting to add its parent node as a contact
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# """
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# # Create a contact with the same ID as the local node's ID
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# contact = self.contact_manager.make_contact(self.nodeID, '127.0.0.1', 9182, self.protocol)
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# # Now try to add it
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# yield self.routingTable.addContact(contact)
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# # ...and request the closest nodes to it using FIND_NODE
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# closest_nodes = self.routingTable.findCloseNodes(self.nodeID, constants.k)
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# self.assertNotIn(contact, closest_nodes, 'Node added itself as a contact')
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#
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# @defer.inlineCallbacks
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# def test_remove_contact(self):
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# """ Tests contact removal """
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# # Create the contact
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# contact_id = generate_id(b'node2')
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# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
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# # Now add it...
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# yield self.routingTable.addContact(contact)
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# # Verify addition
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# self.assertEqual(len(self.routingTable._buckets[0]), 1, 'Contact not added properly')
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# # Now remove it
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# self.routingTable.removeContact(contact)
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# self.assertEqual(len(self.routingTable._buckets[0]), 0, 'Contact not removed properly')
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#
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# @defer.inlineCallbacks
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# def test_split_bucket(self):
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# """ Tests if the the routing table correctly dynamically splits k-buckets """
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# self.assertEqual(self.routingTable._buckets[0].rangeMax, 2**384,
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# 'Initial k-bucket range should be 0 <= range < 2**384')
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# # Add k contacts
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# for i in range(constants.k):
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# node_id = generate_id(b'remote node %d' % i)
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# contact = self.contact_manager.make_contact(node_id, '127.0.0.1', 9182, self.protocol)
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# yield self.routingTable.addContact(contact)
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#
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# self.assertEqual(len(self.routingTable._buckets), 1,
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# 'Only k nodes have been added; the first k-bucket should now '
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# 'be full, but should not yet be split')
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# # Now add 1 more contact
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# node_id = generate_id(b'yet another remote node')
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# contact = self.contact_manager.make_contact(node_id, '127.0.0.1', 9182, self.protocol)
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# yield self.routingTable.addContact(contact)
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# self.assertEqual(len(self.routingTable._buckets), 2,
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# 'k+1 nodes have been added; the first k-bucket should have been '
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# 'split into two new buckets')
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# self.assertNotEqual(self.routingTable._buckets[0].rangeMax, 2**384,
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# 'K-bucket was split, but its range was not properly adjusted')
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# self.assertEqual(self.routingTable._buckets[1].rangeMax, 2**384,
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# 'K-bucket was split, but the second (new) bucket\'s '
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# 'max range was not set properly')
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# self.assertEqual(self.routingTable._buckets[0].rangeMax,
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# self.routingTable._buckets[1].rangeMin,
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# 'K-bucket was split, but the min/max ranges were '
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# 'not divided properly')
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#
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# @defer.inlineCallbacks
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# def test_full_split(self):
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# """
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# Test that a bucket is not split if it is full, but the new contact is not closer than the kth closest contact
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# """
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#
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# self.routingTable._parentNodeID = bytes(48 * b'\xff')
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#
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# node_ids = [
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# b"100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"ff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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# b"010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
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# ]
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#
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# # Add k contacts
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# for nodeID in node_ids:
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# # self.assertEquals(nodeID, node_ids[i].decode('hex'))
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# contact = self.contact_manager.make_contact(unhexlify(nodeID), '127.0.0.1', 9182, self.protocol)
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# yield self.routingTable.addContact(contact)
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# self.assertEqual(len(self.routingTable._buckets), 2)
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# self.assertEqual(len(self.routingTable._buckets[0]._contacts), 8)
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# self.assertEqual(len(self.routingTable._buckets[1]._contacts), 2)
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#
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# # try adding a contact who is further from us than the k'th known contact
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# nodeID = b'020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
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# nodeID = unhexlify(nodeID)
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# contact = self.contact_manager.make_contact(nodeID, '127.0.0.1', 9182, self.protocol)
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# self.assertFalse(self.routingTable._shouldSplit(self.routingTable._kbucketIndex(contact.id), contact.id))
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# yield self.routingTable.addContact(contact)
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# self.assertEqual(len(self.routingTable._buckets), 2)
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# self.assertEqual(len(self.routingTable._buckets[0]._contacts), 8)
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# self.assertEqual(len(self.routingTable._buckets[1]._contacts), 2)
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# self.assertNotIn(contact, self.routingTable._buckets[0]._contacts)
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# self.assertNotIn(contact, self.routingTable._buckets[1]._contacts)
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#
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# class KeyErrorFixedTest(unittest.TestCase):
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# """ Basic tests case for boolean operators on the Contact class """
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#
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# def setUp(self):
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# own_id = (2 ** constants.key_bits) - 1
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# # carefully chosen own_id. here's the logic
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# # we want a bunch of buckets (k+1, to be exact), and we want to make sure own_id
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# # is not in bucket 0. so we put own_id at the end so we can keep splitting by adding to the
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# # end
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#
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# self.table = lbry.dht.routingtable.OptimizedTreeRoutingTable(own_id)
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#
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# def fill_bucket(self, bucket_min):
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# bucket_size = lbry.dht.constants.k
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# for i in range(bucket_min, bucket_min + bucket_size):
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# self.table.addContact(lbry.dht.contact.Contact(long(i), '127.0.0.1', 9999, None))
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#
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# def overflow_bucket(self, bucket_min):
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# bucket_size = lbry.dht.constants.k
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# self.fill_bucket(bucket_min)
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# self.table.addContact(
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# lbry.dht.contact.Contact(long(bucket_min + bucket_size + 1),
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# '127.0.0.1', 9999, None))
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#
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# def testKeyError(self):
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#
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# # find middle, so we know where bucket will split
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# bucket_middle = self.table._buckets[0].rangeMax / 2
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#
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# # fill last bucket
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# self.fill_bucket(self.table._buckets[0].rangeMax - lbry.dht.constants.k - 1)
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# # -1 in previous line because own_id is in last bucket
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#
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# # fill/overflow 7 more buckets
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# bucket_start = 0
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# for i in range(0, lbry.dht.constants.k):
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# self.overflow_bucket(bucket_start)
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# bucket_start += bucket_middle / (2 ** i)
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#
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# # replacement cache now has k-1 entries.
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# # adding one more contact to bucket 0 used to cause a KeyError, but it should work
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# self.table.addContact(
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# lbry.dht.contact.Contact(long(lbry.dht.constants.k + 2), '127.0.0.1', 9999, None))
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#
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# # import math
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# # print ""
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# # for i, bucket in enumerate(self.table._buckets):
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# # print "Bucket " + str(i) + " (2 ** " + str(
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# # math.log(bucket.rangeMin, 2) if bucket.rangeMin > 0 else 0) + " <= x < 2 ** "+str(
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# # math.log(bucket.rangeMax, 2)) + ")"
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# # for c in bucket.getContacts():
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# # print " contact " + str(c.id)
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# # for key, bucket in self.table._replacementCache.items():
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# # print "Replacement Cache for Bucket " + str(key)
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# # for c in bucket:
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# # print " contact " + str(c.id)
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