forked from LBRYCommunity/lbry-sdk
103 lines
4.8 KiB
Python
103 lines
4.8 KiB
Python
import asyncio
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import random
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from functools import reduce
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from lbry.testcase import AsyncioTestCase
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from lbry.torrent.tracker import encode, decode, CompactIPv4Peer, ConnectRequest, \
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ConnectResponse, AnnounceRequest, ErrorResponse, AnnounceResponse, TrackerClient, subscribe_hash
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class UDPTrackerServerProtocol(asyncio.DatagramProtocol): # for testing. Not suitable for production
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def __init__(self):
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self.transport = None
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self.known_conns = set()
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self.peers = {}
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def connection_made(self, transport: asyncio.DatagramTransport) -> None:
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self.transport = transport
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def datagram_received(self, data: bytes, address: (str, int)) -> None:
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if len(data) < 16:
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return
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action = int.from_bytes(data[8:12], "big", signed=False)
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if action == 0:
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req = decode(ConnectRequest, data)
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connection_id = random.getrandbits(32)
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self.known_conns.add(connection_id)
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return self.transport.sendto(encode(ConnectResponse(0, req.transaction_id, connection_id)), address)
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elif action == 1:
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req = decode(AnnounceRequest, data)
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if req.connection_id not in self.known_conns:
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resp = encode(ErrorResponse(3, req.transaction_id, b'Connection ID missmatch.\x00'))
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else:
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self.peers.setdefault(req.info_hash, [])
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compact_ip = reduce(lambda buff, x: buff + bytearray([int(x)]), address[0].split('.'), bytearray())
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compact_address = compact_ip + req.port.to_bytes(2, "big", signed=False)
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if req.event != 3:
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self.peers[req.info_hash].append(compact_address)
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elif compact_address in self.peers[req.info_hash]:
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self.peers[req.info_hash].remove(compact_address)
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peers = [decode(CompactIPv4Peer, peer) for peer in self.peers[req.info_hash]]
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resp = encode(AnnounceResponse(1, req.transaction_id, 1700, 0, len(peers), peers))
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return self.transport.sendto(resp, address)
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class UDPTrackerClientTestCase(AsyncioTestCase):
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async def asyncSetUp(self):
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self.servers = {}
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self.client = TrackerClient(b"\x00" * 48, 4444, [], timeout=0.1)
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await self.client.start()
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self.addCleanup(self.client.stop)
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await self.add_server()
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async def add_server(self, port=None, add_to_client=True):
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port = port or len(self.servers) + 59990
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assert port not in self.servers
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server = UDPTrackerServerProtocol()
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self.servers[port] = server
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transport, _ = await self.loop.create_datagram_endpoint(lambda: server, local_addr=("127.0.0.1", port))
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self.addCleanup(transport.close)
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if add_to_client:
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self.client.servers.append(("127.0.0.1", port))
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async def test_announce(self):
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info_hash = random.getrandbits(160).to_bytes(20, "big", signed=False)
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announcement = (await self.client.get_peer_list(info_hash))[0]
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self.assertEqual(announcement.seeders, 1)
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self.assertEqual(announcement.peers,
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[CompactIPv4Peer(int.from_bytes(bytes([127, 0, 0, 1]), "big", signed=False), 4444)])
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async def test_announce_using_helper_function(self):
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info_hash = random.getrandbits(160).to_bytes(20, "big", signed=False)
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queue = asyncio.Queue()
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subscribe_hash(info_hash, queue.put_nowait)
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announcement = await queue.get()
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peers = announcement.peers
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self.assertEqual(peers, [CompactIPv4Peer(int.from_bytes(bytes([127, 0, 0, 1]), "big", signed=False), 4444)])
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async def test_error(self):
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info_hash = random.getrandbits(160).to_bytes(20, "big", signed=False)
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await self.client.get_peer_list(info_hash)
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list(self.servers.values())[0].known_conns.clear()
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self.client.results.clear()
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with self.assertRaises(Exception) as err:
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await self.client.get_peer_list(info_hash)
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self.assertEqual(err.exception.args[0], b'Connection ID missmatch.\x00')
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async def test_multiple(self):
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await asyncio.gather(*[self.add_server() for _ in range(10)])
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info_hash = random.getrandbits(160).to_bytes(20, "big", signed=False)
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await self.client.get_peer_list(info_hash)
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for server in self.servers.values():
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self.assertEqual(1, len(server.peers))
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self.assertEqual(1, len(server.peers[info_hash]))
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async def test_multiple_with_bad_one(self):
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await asyncio.gather(*[self.add_server() for _ in range(10)])
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self.client.servers.append(("127.0.0.2", 7070))
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info_hash = random.getrandbits(160).to_bytes(20, "big", signed=False)
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await self.client.get_peer_list(info_hash)
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for server in self.servers.values():
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self.assertEqual(1, len(server.peers))
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self.assertEqual(1, len(server.peers[info_hash]))
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