lbry-sdk/tests/unit/dht/protocol/test_routing_table.py

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2019-01-22 18:49:43 +01:00
import asyncio
from torba.testcase import AsyncioTestCase
from tests import dht_mocks
from lbrynet.dht import constants
from lbrynet.dht.node import Node
from lbrynet.dht.peer import PeerManager
expected_ranges = [
(
0,
2462625387274654950767440006258975862817483704404090416746768337765357610718575663213391640930307227550414249394176
),
(
2462625387274654950767440006258975862817483704404090416746768337765357610718575663213391640930307227550414249394176,
4925250774549309901534880012517951725634967408808180833493536675530715221437151326426783281860614455100828498788352
),
(
4925250774549309901534880012517951725634967408808180833493536675530715221437151326426783281860614455100828498788352,
9850501549098619803069760025035903451269934817616361666987073351061430442874302652853566563721228910201656997576704
),
(
9850501549098619803069760025035903451269934817616361666987073351061430442874302652853566563721228910201656997576704,
19701003098197239606139520050071806902539869635232723333974146702122860885748605305707133127442457820403313995153408
),
(
19701003098197239606139520050071806902539869635232723333974146702122860885748605305707133127442457820403313995153408,
39402006196394479212279040100143613805079739270465446667948293404245721771497210611414266254884915640806627990306816
)
]
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class TestRouting(AsyncioTestCase):
async def test_fill_one_bucket(self):
loop = asyncio.get_event_loop()
peer_addresses = [
(constants.generate_id(1), '1.2.3.1'),
(constants.generate_id(2), '1.2.3.2'),
(constants.generate_id(3), '1.2.3.3'),
(constants.generate_id(4), '1.2.3.4'),
(constants.generate_id(5), '1.2.3.5'),
(constants.generate_id(6), '1.2.3.6'),
(constants.generate_id(7), '1.2.3.7'),
(constants.generate_id(8), '1.2.3.8'),
(constants.generate_id(9), '1.2.3.9'),
]
with dht_mocks.mock_network_loop(loop):
nodes = {
i: Node(loop, PeerManager(loop), node_id, 4444, 4444, 3333, address)
for i, (node_id, address) in enumerate(peer_addresses)
}
node_1 = nodes[0]
contact_cnt = 0
for i in range(1, len(peer_addresses)):
self.assertEqual(len(node_1.protocol.routing_table.get_peers()), contact_cnt)
node = nodes[i]
peer = node_1.protocol.peer_manager.get_kademlia_peer(
node.protocol.node_id, node.protocol.external_ip,
udp_port=node.protocol.udp_port
)
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added = await node_1.protocol._add_peer(peer)
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self.assertEqual(True, added)
contact_cnt += 1
self.assertEqual(len(node_1.protocol.routing_table.get_peers()), 8)
self.assertEqual(node_1.protocol.routing_table.buckets_with_contacts(), 1)
for node in nodes.values():
node.protocol.stop()
async def test_split_buckets(self):
loop = asyncio.get_event_loop()
peer_addresses = [
(constants.generate_id(1), '1.2.3.1'),
]
for i in range(2, 200):
peer_addresses.append((constants.generate_id(i), f'1.2.3.{i}'))
with dht_mocks.mock_network_loop(loop):
nodes = {
i: Node(loop, PeerManager(loop), node_id, 4444, 4444, 3333, address)
for i, (node_id, address) in enumerate(peer_addresses)
}
node_1 = nodes[0]
for i in range(1, len(peer_addresses)):
node = nodes[i]
peer = node_1.protocol.peer_manager.get_kademlia_peer(
node.protocol.node_id, node.protocol.external_ip,
udp_port=node.protocol.udp_port
)
# set all of the peers to good (as to not attempt pinging stale ones during split)
node_1.protocol.peer_manager.report_last_replied(peer.address, peer.udp_port)
node_1.protocol.peer_manager.report_last_replied(peer.address, peer.udp_port)
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await node_1.protocol._add_peer(peer)
# check that bucket 0 is always the one covering the local node id
self.assertEqual(True, node_1.protocol.routing_table.buckets[0].key_in_range(node_1.protocol.node_id))
self.assertEqual(40, len(node_1.protocol.routing_table.get_peers()))
self.assertEqual(len(expected_ranges), len(node_1.protocol.routing_table.buckets))
covered = 0
for (expected_min, expected_max), bucket in zip(expected_ranges, node_1.protocol.routing_table.buckets):
self.assertEqual(expected_min, bucket.range_min)
self.assertEqual(expected_max, bucket.range_max)
covered += bucket.range_max - bucket.range_min
self.assertEqual(2**384, covered)
for node in nodes.values():
node.stop()
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# from binascii import hexlify, unhexlify
#
# from twisted.trial import unittest
# from twisted.internet import defer
# from lbrynet.dht import constants
# from lbrynet.dht.routingtable import TreeRoutingTable
# from lbrynet.dht.contact import ContactManager
# from lbrynet.dht.distance import Distance
# from lbrynet.utils import generate_id
#
#
# class FakeRPCProtocol:
# """ Fake RPC protocol; allows lbrynet.dht.contact.Contact objects to "send" RPCs """
# def sendRPC(self, *args, **kwargs):
# return defer.succeed(None)
#
#
# class TreeRoutingTableTest(unittest.TestCase):
# """ Test case for the RoutingTable class """
# def setUp(self):
# self.contact_manager = ContactManager()
# self.nodeID = generate_id(b'node1')
# self.protocol = FakeRPCProtocol()
# self.routingTable = TreeRoutingTable(self.nodeID)
#
# def test_distance(self):
# """ Test to see if distance method returns correct result"""
# d = Distance(bytes((170,) * 48))
# result = d(bytes((85,) * 48))
# expected = int(hexlify(bytes((255,) * 48)), 16)
# self.assertEqual(result, expected)
#
# @defer.inlineCallbacks
# def test_add_contact(self):
# """ Tests if a contact can be added and retrieved correctly """
# # Create the contact
# contact_id = generate_id(b'node2')
# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
# # Now add it...
# yield self.routingTable.addContact(contact)
# # ...and request the closest nodes to it (will retrieve it)
# closest_nodes = self.routingTable.findCloseNodes(contact_id)
# self.assertEqual(len(closest_nodes), 1)
# self.assertIn(contact, closest_nodes)
#
# @defer.inlineCallbacks
# def test_get_contact(self):
# """ Tests if a specific existing contact can be retrieved correctly """
# contact_id = generate_id(b'node2')
# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
# # Now add it...
# yield self.routingTable.addContact(contact)
# # ...and get it again
# same_contact = self.routingTable.getContact(contact_id)
# self.assertEqual(contact, same_contact, 'getContact() should return the same contact')
#
# @defer.inlineCallbacks
# def test_add_parent_node_as_contact(self):
# """
# Tests the routing table's behaviour when attempting to add its parent node as a contact
# """
# # Create a contact with the same ID as the local node's ID
# contact = self.contact_manager.make_contact(self.nodeID, '127.0.0.1', 9182, self.protocol)
# # Now try to add it
# yield self.routingTable.addContact(contact)
# # ...and request the closest nodes to it using FIND_NODE
# closest_nodes = self.routingTable.findCloseNodes(self.nodeID, constants.k)
# self.assertNotIn(contact, closest_nodes, 'Node added itself as a contact')
#
# @defer.inlineCallbacks
# def test_remove_contact(self):
# """ Tests contact removal """
# # Create the contact
# contact_id = generate_id(b'node2')
# contact = self.contact_manager.make_contact(contact_id, '127.0.0.1', 9182, self.protocol)
# # Now add it...
# yield self.routingTable.addContact(contact)
# # Verify addition
# self.assertEqual(len(self.routingTable._buckets[0]), 1, 'Contact not added properly')
# # Now remove it
# self.routingTable.removeContact(contact)
# self.assertEqual(len(self.routingTable._buckets[0]), 0, 'Contact not removed properly')
#
# @defer.inlineCallbacks
# def test_split_bucket(self):
# """ Tests if the the routing table correctly dynamically splits k-buckets """
# self.assertEqual(self.routingTable._buckets[0].rangeMax, 2**384,
# 'Initial k-bucket range should be 0 <= range < 2**384')
# # Add k contacts
# for i in range(constants.k):
# node_id = generate_id(b'remote node %d' % i)
# contact = self.contact_manager.make_contact(node_id, '127.0.0.1', 9182, self.protocol)
# yield self.routingTable.addContact(contact)
#
# self.assertEqual(len(self.routingTable._buckets), 1,
# 'Only k nodes have been added; the first k-bucket should now '
# 'be full, but should not yet be split')
# # Now add 1 more contact
# node_id = generate_id(b'yet another remote node')
# contact = self.contact_manager.make_contact(node_id, '127.0.0.1', 9182, self.protocol)
# yield self.routingTable.addContact(contact)
# self.assertEqual(len(self.routingTable._buckets), 2,
# 'k+1 nodes have been added; the first k-bucket should have been '
# 'split into two new buckets')
# self.assertNotEqual(self.routingTable._buckets[0].rangeMax, 2**384,
# 'K-bucket was split, but its range was not properly adjusted')
# self.assertEqual(self.routingTable._buckets[1].rangeMax, 2**384,
# 'K-bucket was split, but the second (new) bucket\'s '
# 'max range was not set properly')
# self.assertEqual(self.routingTable._buckets[0].rangeMax,
# self.routingTable._buckets[1].rangeMin,
# 'K-bucket was split, but the min/max ranges were '
# 'not divided properly')
#
# @defer.inlineCallbacks
# def test_full_split(self):
# """
# Test that a bucket is not split if it is full, but the new contact is not closer than the kth closest contact
# """
#
# self.routingTable._parentNodeID = bytes(48 * b'\xff')
#
# node_ids = [
# b"100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"ff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
# b"010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
# ]
#
# # Add k contacts
# for nodeID in node_ids:
# # self.assertEquals(nodeID, node_ids[i].decode('hex'))
# contact = self.contact_manager.make_contact(unhexlify(nodeID), '127.0.0.1', 9182, self.protocol)
# yield self.routingTable.addContact(contact)
# self.assertEqual(len(self.routingTable._buckets), 2)
# self.assertEqual(len(self.routingTable._buckets[0]._contacts), 8)
# self.assertEqual(len(self.routingTable._buckets[1]._contacts), 2)
#
# # try adding a contact who is further from us than the k'th known contact
# nodeID = b'020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
# nodeID = unhexlify(nodeID)
# contact = self.contact_manager.make_contact(nodeID, '127.0.0.1', 9182, self.protocol)
# self.assertFalse(self.routingTable._shouldSplit(self.routingTable._kbucketIndex(contact.id), contact.id))
# yield self.routingTable.addContact(contact)
# self.assertEqual(len(self.routingTable._buckets), 2)
# self.assertEqual(len(self.routingTable._buckets[0]._contacts), 8)
# self.assertEqual(len(self.routingTable._buckets[1]._contacts), 2)
# self.assertNotIn(contact, self.routingTable._buckets[0]._contacts)
# self.assertNotIn(contact, self.routingTable._buckets[1]._contacts)
#
# class KeyErrorFixedTest(unittest.TestCase):
# """ Basic tests case for boolean operators on the Contact class """
#
# def setUp(self):
# own_id = (2 ** constants.key_bits) - 1
# # carefully chosen own_id. here's the logic
# # we want a bunch of buckets (k+1, to be exact), and we want to make sure own_id
# # is not in bucket 0. so we put own_id at the end so we can keep splitting by adding to the
# # end
#
# self.table = lbrynet.dht.routingtable.OptimizedTreeRoutingTable(own_id)
#
# def fill_bucket(self, bucket_min):
# bucket_size = lbrynet.dht.constants.k
# for i in range(bucket_min, bucket_min + bucket_size):
# self.table.addContact(lbrynet.dht.contact.Contact(long(i), '127.0.0.1', 9999, None))
#
# def overflow_bucket(self, bucket_min):
# bucket_size = lbrynet.dht.constants.k
# self.fill_bucket(bucket_min)
# self.table.addContact(
# lbrynet.dht.contact.Contact(long(bucket_min + bucket_size + 1),
# '127.0.0.1', 9999, None))
#
# def testKeyError(self):
#
# # find middle, so we know where bucket will split
# bucket_middle = self.table._buckets[0].rangeMax / 2
#
# # fill last bucket
# self.fill_bucket(self.table._buckets[0].rangeMax - lbrynet.dht.constants.k - 1)
# # -1 in previous line because own_id is in last bucket
#
# # fill/overflow 7 more buckets
# bucket_start = 0
# for i in range(0, lbrynet.dht.constants.k):
# self.overflow_bucket(bucket_start)
# bucket_start += bucket_middle / (2 ** i)
#
# # replacement cache now has k-1 entries.
# # adding one more contact to bucket 0 used to cause a KeyError, but it should work
# self.table.addContact(
# lbrynet.dht.contact.Contact(long(lbrynet.dht.constants.k + 2), '127.0.0.1', 9999, None))
#
# # import math
# # print ""
# # for i, bucket in enumerate(self.table._buckets):
# # print "Bucket " + str(i) + " (2 ** " + str(
# # math.log(bucket.rangeMin, 2) if bucket.rangeMin > 0 else 0) + " <= x < 2 ** "+str(
# # math.log(bucket.rangeMax, 2)) + ")"
# # for c in bucket.getContacts():
# # print " contact " + str(c.id)
# # for key, bucket in self.table._replacementCache.items():
# # print "Replacement Cache for Bucket " + str(key)
# # for c in bucket:
# # print " contact " + str(c.id)