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ignore udp packets with low source ports

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Jack Robison 2021-04-28 12:20:37 -04:00
parent 73d35bc985
commit c465d6a6c2
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3 changed files with 37 additions and 31 deletions
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4
lbry/dht/peer.py
View file

@ -155,9 +155,9 @@ class KademliaPeer:
if self._node_id is not None:
if not len(self._node_id) == constants.HASH_LENGTH:
raise ValueError("invalid node_id: {}".format(hexlify(self._node_id).decode()))
if self.udp_port is not None and not 1 <= self.udp_port <= 65535:
if self.udp_port is not None and not 1024 <= self.udp_port <= 65535:
raise ValueError("invalid udp port")
if self.tcp_port is not None and not 1 <= self.tcp_port <= 65535:
if self.tcp_port is not None and not 1024 <= self.tcp_port <= 65535:
raise ValueError("invalid tcp port")
if not is_valid_public_ipv4(self.address, self.allow_localhost):
raise ValueError(f"invalid ip address: '{self.address}'")

13
lbry/wallet/server/udp.py
View file

@ -3,7 +3,7 @@ import struct
from time import perf_counter
import logging
from typing import Optional, Tuple, NamedTuple
from lbry.utils import LRUCache
from lbry.utils import LRUCache, is_valid_public_ipv4
# from prometheus_client import Counter
@ -69,7 +69,8 @@ class SPVPong(NamedTuple):
class SPVServerStatusProtocol(asyncio.DatagramProtocol):
PROTOCOL_VERSION = 1
def __init__(self, height: int, tip: bytes, throttle_cache_size: int = 1024, throttle_reqs_per_sec: int = 10):
def __init__(self, height: int, tip: bytes, throttle_cache_size: int = 1024, throttle_reqs_per_sec: int = 10,
allow_localhost: bool = False):
super().__init__()
self.transport: Optional[asyncio.transports.DatagramTransport] = None
self._height = height
@ -80,6 +81,7 @@ class SPVServerStatusProtocol(asyncio.DatagramProtocol):
self._throttle = LRUCache(throttle_cache_size)
self._should_log = LRUCache(throttle_cache_size)
self._min_delay = 1 / throttle_reqs_per_sec
self._allow_localhost = allow_localhost
def update_cached_response(self):
self._cached_response = SPVPong.make(self._height, self._tip, self._flags, self.PROTOCOL_VERSION)
@ -119,7 +121,10 @@ class SPVServerStatusProtocol(asyncio.DatagramProtocol):
except (ValueError, struct.error, AttributeError, TypeError):
# log.exception("derp")
return
self.transport.sendto(self.make_pong(addr[0]), addr)
if is_valid_public_ipv4(addr[0], allow_localhost=self._allow_localhost) and addr[1] >= 1024:
self.transport.sendto(self.make_pong(addr[0]), addr)
else:
log.warning("odd packet from %s:%i", addr[0], addr[1])
# ping_count_metric.inc()
def connection_made(self, transport) -> None:
@ -141,8 +146,8 @@ class StatusServer:
if self.is_running:
return
loop = asyncio.get_event_loop()
self._protocol = SPVServerStatusProtocol(height, tip)
interface = interface if interface.lower() != 'localhost' else '127.0.0.1'
self._protocol = SPVServerStatusProtocol(height, tip, allow_localhost=interface == '127.0.0.1')
await loop.create_datagram_endpoint(lambda: self._protocol, (interface, port))
log.info("started udp status server on %s:%i", interface, port)

51
tests/unit/dht/test_peer.py
View file

@ -10,8 +10,8 @@ class PeerTest(AsyncioTestCase):
self.loop = asyncio.get_event_loop()
self.peer_manager = PeerManager(self.loop)
self.node_ids = [generate_id(), generate_id(), generate_id()]
self.first_contact = make_kademlia_peer(self.node_ids[1], '1.0.0.1', udp_port=1000)
self.second_contact = make_kademlia_peer(self.node_ids[0], '1.0.0.2', udp_port=1000)
self.first_contact = make_kademlia_peer(self.node_ids[1], '1.0.0.1', udp_port=1024)
self.second_contact = make_kademlia_peer(self.node_ids[0], '1.0.0.2', udp_port=1024)
def test_peer_is_good_unknown_peer(self):
# Scenario: peer replied, but caller doesn't know the node_id.
@ -25,36 +25,37 @@ class PeerTest(AsyncioTestCase):
def test_make_contact_error_cases(self):
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4', 100000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4.5', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], 'this is not an ip', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4.5', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], 'this is not an ip', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4', -1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4', 0)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4', 1023)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '1.2.3.4', 70000)
self.assertRaises(ValueError, make_kademlia_peer, b'not valid node id', '1.2.3.4', 1000)
self.assertRaises(ValueError, make_kademlia_peer, b'not valid node id', '1.2.3.4', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '0.0.0.0', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '10.0.0.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '100.64.0.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '127.0.0.1', 1000)
self.assertIsNotNone(make_kademlia_peer(self.node_ids[1], '127.0.0.1', 1000, allow_localhost=True))
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.168.0.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '172.16.0.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '169.254.1.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.0.0.2', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.0.2.2', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.88.99.2', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.18.1.1', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.51.100.2', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.51.100.2', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '203.0.113.4', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '0.0.0.0', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '10.0.0.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '100.64.0.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '127.0.0.1', 1024)
self.assertIsNotNone(make_kademlia_peer(self.node_ids[1], '127.0.0.1', 1024, allow_localhost=True))
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.168.0.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '172.16.0.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '169.254.1.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.0.0.2', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.0.2.2', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '192.88.99.2', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.18.1.1', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.51.100.2', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '198.51.100.2', 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '203.0.113.4', 1024)
for i in range(32):
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], f"{224 + i}.0.0.0", 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '255.255.255.255', 1000)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], f"{224 + i}.0.0.0", 1024)
self.assertRaises(ValueError, make_kademlia_peer, self.node_ids[1], '255.255.255.255', 1024)
self.assertRaises(
ValueError, make_kademlia_peer, self.node_ids[1], 'beee:eeee:eeee:eeee:eeee:eeee:eeee:eeef', 1000
ValueError, make_kademlia_peer, self.node_ids[1], 'beee:eeee:eeee:eeee:eeee:eeee:eeee:eeef', 1024
)
self.assertRaises(
ValueError, make_kademlia_peer, self.node_ids[1], '2001:db8::ff00:42:8329', 1000
ValueError, make_kademlia_peer, self.node_ids[1], '2001:db8::ff00:42:8329', 1024
)
def test_is_valid_ipv4(self):
@ -79,7 +80,7 @@ class PeerTest(AsyncioTestCase):
def test_boolean(self):
self.assertNotEqual(self.first_contact, self.second_contact)
self.assertEqual(
self.second_contact, make_kademlia_peer(self.node_ids[0], '1.0.0.2', udp_port=1000)
self.second_contact, make_kademlia_peer(self.node_ids[0], '1.0.0.2', udp_port=1024)
)
def test_compact_ip(self):