166 lines
7.7 KiB
Python
166 lines
7.7 KiB
Python
import asyncio
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from binascii import hexlify
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from lbry.extras.daemon.storage import SQLiteStorage
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from lbry.conf import Config
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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 import peer as dht_peer
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from lbry.dht.peer import PeerManager, make_kademlia_peer
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from lbry.testcase import AsyncioTestCase
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class DHTIntegrationTest(AsyncioTestCase):
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async def asyncSetUp(self):
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dht_peer.ALLOW_LOCALHOST = True
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self.addCleanup(setattr, dht_peer, 'ALLOW_LOCALHOST', False)
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import logging
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logging.getLogger('asyncio').setLevel(logging.ERROR)
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logging.getLogger('lbry.dht').setLevel(logging.WARN)
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self.nodes = []
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self.known_node_addresses = []
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async def create_node(self, node_id, port, external_ip='127.0.0.1'):
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storage = SQLiteStorage(Config(), ":memory:", self.loop, self.loop.time)
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await storage.open()
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node = Node(self.loop, PeerManager(self.loop), node_id=node_id,
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udp_port=port, internal_udp_port=port,
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peer_port=3333, external_ip=external_ip,
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storage=storage)
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self.addCleanup(node.stop)
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node.protocol.rpc_timeout = .5
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node.protocol.ping_queue._default_delay = .5
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return node
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async def setup_network(self, size: int, start_port=40000, seed_nodes=1, external_ip='127.0.0.1'):
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for i in range(size):
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node_port = start_port + i
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node_id = constants.generate_id(i)
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node = await self.create_node(node_id, node_port)
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self.nodes.append(node)
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self.known_node_addresses.append((external_ip, node_port))
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for node in self.nodes:
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node.start(external_ip, self.known_node_addresses[:seed_nodes])
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async def test_replace_bad_nodes(self):
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await self.setup_network(20)
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await asyncio.gather(*[node.joined.wait() for node in self.nodes])
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self.assertEqual(len(self.nodes), 20)
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node = self.nodes[0]
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bad_peers = []
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for candidate in self.nodes[1:10]:
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address, port, node_id = candidate.protocol.external_ip, candidate.protocol.udp_port, candidate.protocol.node_id
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peer = make_kademlia_peer(node_id, address, udp_port=port)
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bad_peers.append(peer)
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node.protocol.add_peer(peer)
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candidate.stop()
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await asyncio.sleep(.3) # let pending events settle
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for bad_peer in bad_peers:
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self.assertIn(bad_peer, node.protocol.routing_table.get_peers())
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await node.refresh_node(True)
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await asyncio.sleep(.3) # let pending events settle
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good_nodes = {good_node.protocol.node_id for good_node in self.nodes[10:]}
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for peer in node.protocol.routing_table.get_peers():
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self.assertIn(peer.node_id, good_nodes)
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async def test_re_join(self):
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await self.setup_network(20, seed_nodes=10)
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await asyncio.gather(*[node.joined.wait() for node in self.nodes])
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node = self.nodes[-1]
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self.assertTrue(node.joined.is_set())
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self.assertTrue(node.protocol.routing_table.get_peers())
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for network_node in self.nodes[:-1]:
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network_node.stop()
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await node.refresh_node(True)
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await asyncio.sleep(.3) # let pending events settle
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self.assertFalse(node.protocol.routing_table.get_peers())
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for network_node in self.nodes[:-1]:
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network_node.start('127.0.0.1', self.known_node_addresses)
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self.assertFalse(node.protocol.routing_table.get_peers())
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timeout = 20
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while not node.protocol.routing_table.get_peers():
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await asyncio.sleep(.1)
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timeout -= 1
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if not timeout:
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self.fail("node didn't join back after 2 seconds")
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async def test_announce_no_peers(self):
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await self.setup_network(1)
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node = self.nodes[0]
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blob_hash = hexlify(constants.generate_id(1337)).decode()
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peers = await node.announce_blob(blob_hash)
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self.assertEqual(len(peers), 0)
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async def test_get_token_on_announce(self):
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await self.setup_network(2, seed_nodes=2)
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await asyncio.gather(*[node.joined.wait() for node in self.nodes])
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node1, node2 = self.nodes
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node1.protocol.peer_manager.clear_token(node2.protocol.node_id)
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blob_hash = hexlify(constants.generate_id(1337)).decode()
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node_ids = await node1.announce_blob(blob_hash)
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self.assertIn(node2.protocol.node_id, node_ids)
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node2.protocol.node_rpc.refresh_token()
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node_ids = await node1.announce_blob(blob_hash)
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self.assertIn(node2.protocol.node_id, node_ids)
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node2.protocol.node_rpc.refresh_token()
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node_ids = await node1.announce_blob(blob_hash)
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self.assertIn(node2.protocol.node_id, node_ids)
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async def test_peer_search_removes_bad_peers(self):
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# that's an edge case discovered by Tom, but an important one
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# imagine that you only got bad peers and refresh will happen in one hour
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# instead of failing for one hour we should be able to recover by scheduling pings to bad peers we find
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await self.setup_network(2, seed_nodes=2)
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await asyncio.gather(*[node.joined.wait() for node in self.nodes])
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node1, node2 = self.nodes
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node2.stop()
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# forcefully make it a bad peer but don't remove it from routing table
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address, port, node_id = node2.protocol.external_ip, node2.protocol.udp_port, node2.protocol.node_id
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peer = make_kademlia_peer(node_id, address, udp_port=port)
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self.assertTrue(node1.protocol.peer_manager.peer_is_good(peer))
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node1.protocol.peer_manager.report_failure(node2.protocol.external_ip, node2.protocol.udp_port)
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node1.protocol.peer_manager.report_failure(node2.protocol.external_ip, node2.protocol.udp_port)
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self.assertFalse(node1.protocol.peer_manager.peer_is_good(peer))
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# now a search happens, which removes bad peers while contacting them
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self.assertTrue(node1.protocol.routing_table.get_peers())
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await node1.peer_search(node2.protocol.node_id)
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await asyncio.sleep(.3) # let pending events settle
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self.assertFalse(node1.protocol.routing_table.get_peers())
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async def test_peer_persistance(self):
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num_nodes = 6
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start_port = 40000
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num_seeds = 2
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external_ip = '127.0.0.1'
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# Start a node
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await self.setup_network(num_nodes, start_port=start_port, seed_nodes=num_seeds)
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await asyncio.gather(*[node.joined.wait() for node in self.nodes])
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node1 = self.nodes[-1]
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peer_args = [(n.protocol.node_id, n.protocol.external_ip, n.protocol.udp_port, n.protocol.peer_port) for n in
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self.nodes[:num_seeds]]
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peers = [make_kademlia_peer(*args) for args in peer_args]
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# node1 is bootstrapped from the fixed seeds
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self.assertCountEqual(peers, node1.protocol.routing_table.get_peers())
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# Refresh and assert that the peers were persisted
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await node1.refresh_node(True)
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self.assertEqual(len(peer_args), len(await node1._storage.get_persisted_kademlia_peers()))
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node1.stop()
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# Start a fresh node with the same node_id and storage, but no known peers
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node2 = await self.create_node(constants.generate_id(num_nodes-1), start_port+num_nodes-1)
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node2._storage = node1._storage
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node2.start(external_ip, [])
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await node2.joined.wait()
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# The peers are restored
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self.assertEqual(num_seeds, len(node2.protocol.routing_table.get_peers()))
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for bucket1, bucket2 in zip(node1.protocol.routing_table.buckets, node2.protocol.routing_table.buckets):
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self.assertEqual((bucket1.range_min, bucket1.range_max), (bucket2.range_min, bucket2.range_max))
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