import contextlib import logging import typing import binascii import socket import asyncio from lbry.testcase import AsyncioTestCase from tests import dht_mocks from lbry.dht.protocol.distance import Distance from lbry.conf import Config from lbry.dht import constants from lbry.dht.node import Node from lbry.dht.peer import PeerManager, make_kademlia_peer from lbry.dht.blob_announcer import BlobAnnouncer from lbry.extras.daemon.storage import SQLiteStorage class TestBlobAnnouncer(AsyncioTestCase): async def setup_node(self, peer_addresses, address, node_id): self.nodes: typing.Dict[int, Node] = {} self.advance = dht_mocks.get_time_accelerator(self.loop) self.instant_advance = dht_mocks.get_time_accelerator(self.loop) self.conf = Config() self.peer_manager = PeerManager(self.loop) self.node = Node(self.loop, self.peer_manager, node_id, 4444, 4444, 3333, address) await self.node.start_listening(address) await asyncio.gather(*[self.add_peer(node_id, address) for node_id, address in peer_addresses]) for first_peer in self.nodes.values(): for second_peer in self.nodes.values(): if first_peer == second_peer: continue self.add_peer_to_routing_table(first_peer, second_peer) self.add_peer_to_routing_table(second_peer, first_peer) await self.advance(0.1) # just to make pings go through self.node.joined.set() self.node._refresh_task = self.loop.create_task(self.node.refresh_node()) self.storage = SQLiteStorage(self.conf, ":memory:", self.loop, self.loop.time) await self.storage.open() self.blob_announcer = BlobAnnouncer(self.loop, self.node, self.storage) async def add_peer(self, node_id, address, add_to_routing_table=True): #print('add', node_id.hex()[:8], address) n = Node(self.loop, PeerManager(self.loop), node_id, 4444, 4444, 3333, address) await n.start_listening(address) self.nodes.update({len(self.nodes): n}) if add_to_routing_table: self.add_peer_to_routing_table(self.node, n) def add_peer_to_routing_table(self, adder, being_added): adder.protocol.add_peer( make_kademlia_peer( being_added.protocol.node_id, being_added.protocol.external_ip, being_added.protocol.udp_port ) ) @contextlib.asynccontextmanager async def _test_network_context(self, peer_count=200): self.peer_addresses = [ (constants.generate_id(i), socket.inet_ntoa(int(i + 0x01000001).to_bytes(length=4, byteorder='big'))) for i in range(1, peer_count + 1) ] try: with dht_mocks.mock_network_loop(self.loop): await self.setup_node(self.peer_addresses, '1.2.3.1', constants.generate_id(1000)) yield finally: self.blob_announcer.stop() self.node.stop() for n in self.nodes.values(): n.stop() async def chain_peer(self, node_id, address): previous_last_node = self.nodes[len(self.nodes) - 1] await self.add_peer(node_id, address, False) last_node = self.nodes[len(self.nodes) - 1] peer = last_node.protocol.get_rpc_peer( make_kademlia_peer( previous_last_node.protocol.node_id, previous_last_node.protocol.external_ip, previous_last_node.protocol.udp_port ) ) await peer.ping() return last_node async def test_announce_blobs(self): blob1 = binascii.hexlify(b'1' * 48).decode() blob2 = binascii.hexlify(b'2' * 48).decode() async with self._test_network_context(peer_count=100): await self.storage.add_blobs((blob1, 1024, 0, True), (blob2, 1024, 0, True), finished=True) await self.storage.add_blobs( *((constants.generate_id(value).hex(), 1024, 0, True) for value in range(1000, 1090)), finished=True) await self.storage.db.execute("update blob set next_announce_time=0, should_announce=1") to_announce = await self.storage.get_blobs_to_announce() self.assertEqual(92, len(to_announce)) self.blob_announcer.start(batch_size=10) # so it covers batching logic # takes 60 seconds to start, but we advance 120 to ensure it processed all batches ongoing_announcements = asyncio.ensure_future(self.blob_announcer.wait()) await self.instant_advance(60.0) await ongoing_announcements to_announce = await self.storage.get_blobs_to_announce() self.assertEqual(0, len(to_announce)) self.blob_announcer.stop() # as routing table pollution will cause some peers to be hard to reach, we add a tolerance for CI tolerance = 0.8 # at least 80% of the announcements are within the top K for blob in await self.storage.get_all_blob_hashes(): distance = Distance(bytes.fromhex(blob)) candidates = list(self.nodes.values()) candidates.sort(key=lambda sorting_node: distance(sorting_node.protocol.node_id)) has_it = 0 for index, node in enumerate(candidates[:constants.K], start=1): if node.protocol.data_store.get_peers_for_blob(bytes.fromhex(blob)): has_it += 1 else: logging.warning("blob %s wasnt found between the best K (%s)", blob[:8], node.protocol.node_id.hex()[:8]) self.assertGreaterEqual(has_it, int(tolerance * constants.K)) # test that we can route from a poorly connected peer all the way to the announced blob current = len(self.nodes) await self.chain_peer(constants.generate_id(current + 1), '1.2.3.10') await self.chain_peer(constants.generate_id(current + 2), '1.2.3.11') await self.chain_peer(constants.generate_id(current + 3), '1.2.3.12') await self.chain_peer(constants.generate_id(current + 4), '1.2.3.13') last = await self.chain_peer(constants.generate_id(current + 5), '1.2.3.14') search_q, peer_q = asyncio.Queue(), asyncio.Queue() search_q.put_nowait(blob1) _, task = last.accumulate_peers(search_q, peer_q) found_peers = await asyncio.wait_for(peer_q.get(), 1.0) task.cancel() self.assertEqual(1, len(found_peers)) self.assertEqual(self.node.protocol.node_id, found_peers[0].node_id) self.assertEqual(self.node.protocol.external_ip, found_peers[0].address) self.assertEqual(self.node.protocol.peer_port, found_peers[0].tcp_port) async def test_popular_blob(self): peer_count = 150 blob_hash = constants.generate_id(99999) async with self._test_network_context(peer_count=peer_count): total_seen = set() announced_to = self.nodes.pop(0) for i, node in enumerate(self.nodes.values()): self.add_peer_to_routing_table(announced_to, node) peer = node.protocol.get_rpc_peer( make_kademlia_peer( announced_to.protocol.node_id, announced_to.protocol.external_ip, announced_to.protocol.udp_port ) ) response = await peer.store(blob_hash) self.assertEqual(response, b'OK') peers_for_blob = await peer.find_value(blob_hash, 0) if i == 0: self.assertNotIn(blob_hash, peers_for_blob) self.assertEqual(peers_for_blob[b'p'], 0) else: self.assertEqual(len(peers_for_blob[blob_hash]), min(i, constants.K)) self.assertEqual(len(announced_to.protocol.data_store.get_peers_for_blob(blob_hash)), i + 1) if i - 1 > constants.K: self.assertEqual(len(peers_for_blob[b'contacts']), constants.K) self.assertEqual(peers_for_blob[b'p'], (i // (constants.K + 1)) + 1) seen = set(peers_for_blob[blob_hash]) self.assertEqual(len(seen), constants.K) self.assertEqual(len(peers_for_blob[blob_hash]), len(seen)) for pg in range(1, peers_for_blob[b'p']): page_x = await peer.find_value(blob_hash, pg) self.assertNotIn(b'contacts', page_x) page_x_set = set(page_x[blob_hash]) self.assertEqual(len(page_x[blob_hash]), len(page_x_set)) self.assertGreater(len(page_x_set), 0) self.assertSetEqual(seen.intersection(page_x_set), set()) seen.intersection_update(page_x_set) total_seen.update(page_x_set) else: self.assertEqual(len(peers_for_blob[b'contacts']), 8) # we always add 8 on first page self.assertEqual(len(total_seen), peer_count - 2)