https://github.com/bitcoin/bitcoin/pull/13715 introduced a new check for _transport.is_closing() in mininode's P2PConnection's. This function is only available from Python 3.4.4, though, while Bitcoin is supposed to support all Python 3.4 versions. In this change, we make the check conditional on is_closing() being available. If it is not, then we revert to the behaviour before the check was introduced; this means that https://github.com/bitcoin/bitcoin/issues/13579 is not fixed for old systems, but at least the tests work as they used to do before. This includes a small refactoring from a one-line lambda to an inline function, because this makes the code easier to read with more and more conditions being added. Fixes https://github.com/bitcoin/bitcoin/issues/13745.
548 lines
22 KiB
Python
Executable file
548 lines
22 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
# Copyright (c) 2010 ArtForz -- public domain half-a-node
|
|
# Copyright (c) 2012 Jeff Garzik
|
|
# Copyright (c) 2010-2017 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""Bitcoin P2P network half-a-node.
|
|
|
|
This python code was modified from ArtForz' public domain half-a-node, as
|
|
found in the mini-node branch of http://github.com/jgarzik/pynode.
|
|
|
|
P2PConnection: A low-level connection object to a node's P2P interface
|
|
P2PInterface: A high-level interface object for communicating to a node over P2P
|
|
P2PDataStore: A p2p interface class that keeps a store of transactions and blocks
|
|
and can respond correctly to getdata and getheaders messages"""
|
|
import asyncio
|
|
from collections import defaultdict
|
|
from io import BytesIO
|
|
import logging
|
|
import struct
|
|
import sys
|
|
import threading
|
|
|
|
from test_framework.messages import *
|
|
from test_framework.util import wait_until
|
|
|
|
logger = logging.getLogger("TestFramework.mininode")
|
|
|
|
MESSAGEMAP = {
|
|
b"addr": msg_addr,
|
|
b"block": msg_block,
|
|
b"blocktxn": msg_blocktxn,
|
|
b"cmpctblock": msg_cmpctblock,
|
|
b"feefilter": msg_feefilter,
|
|
b"getaddr": msg_getaddr,
|
|
b"getblocks": msg_getblocks,
|
|
b"getblocktxn": msg_getblocktxn,
|
|
b"getdata": msg_getdata,
|
|
b"getheaders": msg_getheaders,
|
|
b"headers": msg_headers,
|
|
b"inv": msg_inv,
|
|
b"mempool": msg_mempool,
|
|
b"ping": msg_ping,
|
|
b"pong": msg_pong,
|
|
b"reject": msg_reject,
|
|
b"sendcmpct": msg_sendcmpct,
|
|
b"sendheaders": msg_sendheaders,
|
|
b"tx": msg_tx,
|
|
b"verack": msg_verack,
|
|
b"version": msg_version,
|
|
}
|
|
|
|
MAGIC_BYTES = {
|
|
"mainnet": b"\xf9\xbe\xb4\xd9", # mainnet
|
|
"testnet3": b"\x0b\x11\x09\x07", # testnet3
|
|
"regtest": b"\xfa\xbf\xb5\xda", # regtest
|
|
}
|
|
|
|
|
|
class P2PConnection(asyncio.Protocol):
|
|
"""A low-level connection object to a node's P2P interface.
|
|
|
|
This class is responsible for:
|
|
|
|
- opening and closing the TCP connection to the node
|
|
- reading bytes from and writing bytes to the socket
|
|
- deserializing and serializing the P2P message header
|
|
- logging messages as they are sent and received
|
|
|
|
This class contains no logic for handing the P2P message payloads. It must be
|
|
sub-classed and the on_message() callback overridden."""
|
|
|
|
def __init__(self):
|
|
# The underlying transport of the connection.
|
|
# Should only call methods on this from the NetworkThread, c.f. call_soon_threadsafe
|
|
self._transport = None
|
|
|
|
@property
|
|
def is_connected(self):
|
|
return self._transport is not None
|
|
|
|
def peer_connect(self, dstaddr, dstport, net="regtest"):
|
|
assert not self.is_connected
|
|
self.dstaddr = dstaddr
|
|
self.dstport = dstport
|
|
# The initial message to send after the connection was made:
|
|
self.on_connection_send_msg = None
|
|
self.recvbuf = b""
|
|
self.network = net
|
|
logger.debug('Connecting to Bitcoin Node: %s:%d' % (self.dstaddr, self.dstport))
|
|
|
|
loop = NetworkThread.network_event_loop
|
|
conn_gen_unsafe = loop.create_connection(lambda: self, host=self.dstaddr, port=self.dstport)
|
|
conn_gen = lambda: loop.call_soon_threadsafe(loop.create_task, conn_gen_unsafe)
|
|
return conn_gen
|
|
|
|
def peer_disconnect(self):
|
|
# Connection could have already been closed by other end.
|
|
NetworkThread.network_event_loop.call_soon_threadsafe(lambda: self._transport and self._transport.abort())
|
|
|
|
# Connection and disconnection methods
|
|
|
|
def connection_made(self, transport):
|
|
"""asyncio callback when a connection is opened."""
|
|
assert not self._transport
|
|
logger.debug("Connected & Listening: %s:%d" % (self.dstaddr, self.dstport))
|
|
self._transport = transport
|
|
if self.on_connection_send_msg:
|
|
self.send_message(self.on_connection_send_msg)
|
|
self.on_connection_send_msg = None # Never used again
|
|
self.on_open()
|
|
|
|
def connection_lost(self, exc):
|
|
"""asyncio callback when a connection is closed."""
|
|
if exc:
|
|
logger.warning("Connection lost to {}:{} due to {}".format(self.dstaddr, self.dstport, exc))
|
|
else:
|
|
logger.debug("Closed connection to: %s:%d" % (self.dstaddr, self.dstport))
|
|
self._transport = None
|
|
self.recvbuf = b""
|
|
self.on_close()
|
|
|
|
# Socket read methods
|
|
|
|
def data_received(self, t):
|
|
"""asyncio callback when data is read from the socket."""
|
|
if len(t) > 0:
|
|
self.recvbuf += t
|
|
self._on_data()
|
|
|
|
def _on_data(self):
|
|
"""Try to read P2P messages from the recv buffer.
|
|
|
|
This method reads data from the buffer in a loop. It deserializes,
|
|
parses and verifies the P2P header, then passes the P2P payload to
|
|
the on_message callback for processing."""
|
|
try:
|
|
while True:
|
|
if len(self.recvbuf) < 4:
|
|
return
|
|
if self.recvbuf[:4] != MAGIC_BYTES[self.network]:
|
|
raise ValueError("got garbage %s" % repr(self.recvbuf))
|
|
if len(self.recvbuf) < 4 + 12 + 4 + 4:
|
|
return
|
|
command = self.recvbuf[4:4+12].split(b"\x00", 1)[0]
|
|
msglen = struct.unpack("<i", self.recvbuf[4+12:4+12+4])[0]
|
|
checksum = self.recvbuf[4+12+4:4+12+4+4]
|
|
if len(self.recvbuf) < 4 + 12 + 4 + 4 + msglen:
|
|
return
|
|
msg = self.recvbuf[4+12+4+4:4+12+4+4+msglen]
|
|
th = sha256(msg)
|
|
h = sha256(th)
|
|
if checksum != h[:4]:
|
|
raise ValueError("got bad checksum " + repr(self.recvbuf))
|
|
self.recvbuf = self.recvbuf[4+12+4+4+msglen:]
|
|
if command not in MESSAGEMAP:
|
|
raise ValueError("Received unknown command from %s:%d: '%s' %s" % (self.dstaddr, self.dstport, command, repr(msg)))
|
|
f = BytesIO(msg)
|
|
t = MESSAGEMAP[command]()
|
|
t.deserialize(f)
|
|
self._log_message("receive", t)
|
|
self.on_message(t)
|
|
except Exception as e:
|
|
logger.exception('Error reading message:', repr(e))
|
|
raise
|
|
|
|
def on_message(self, message):
|
|
"""Callback for processing a P2P payload. Must be overridden by derived class."""
|
|
raise NotImplementedError
|
|
|
|
# Socket write methods
|
|
|
|
def send_message(self, message):
|
|
"""Send a P2P message over the socket.
|
|
|
|
This method takes a P2P payload, builds the P2P header and adds
|
|
the message to the send buffer to be sent over the socket."""
|
|
if not self.is_connected:
|
|
raise IOError('Not connected')
|
|
self._log_message("send", message)
|
|
tmsg = self._build_message(message)
|
|
|
|
def maybe_write():
|
|
if not self._transport:
|
|
return
|
|
# Python <3.4.4 does not have is_closing, so we have to check for
|
|
# its existence explicitly as long as Bitcoin Core supports all
|
|
# Python 3.4 versions.
|
|
if hasattr(self._transport, 'is_closing') and self._transport.is_closing():
|
|
return
|
|
self._transport.write(tmsg)
|
|
NetworkThread.network_event_loop.call_soon_threadsafe(maybe_write)
|
|
|
|
# Class utility methods
|
|
|
|
def _build_message(self, message):
|
|
"""Build a serialized P2P message"""
|
|
command = message.command
|
|
data = message.serialize()
|
|
tmsg = MAGIC_BYTES[self.network]
|
|
tmsg += command
|
|
tmsg += b"\x00" * (12 - len(command))
|
|
tmsg += struct.pack("<I", len(data))
|
|
th = sha256(data)
|
|
h = sha256(th)
|
|
tmsg += h[:4]
|
|
tmsg += data
|
|
return tmsg
|
|
|
|
def _log_message(self, direction, msg):
|
|
"""Logs a message being sent or received over the connection."""
|
|
if direction == "send":
|
|
log_message = "Send message to "
|
|
elif direction == "receive":
|
|
log_message = "Received message from "
|
|
log_message += "%s:%d: %s" % (self.dstaddr, self.dstport, repr(msg)[:500])
|
|
if len(log_message) > 500:
|
|
log_message += "... (msg truncated)"
|
|
logger.debug(log_message)
|
|
|
|
|
|
class P2PInterface(P2PConnection):
|
|
"""A high-level P2P interface class for communicating with a Bitcoin node.
|
|
|
|
This class provides high-level callbacks for processing P2P message
|
|
payloads, as well as convenience methods for interacting with the
|
|
node over P2P.
|
|
|
|
Individual testcases should subclass this and override the on_* methods
|
|
if they want to alter message handling behaviour."""
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
# Track number of messages of each type received and the most recent
|
|
# message of each type
|
|
self.message_count = defaultdict(int)
|
|
self.last_message = {}
|
|
|
|
# A count of the number of ping messages we've sent to the node
|
|
self.ping_counter = 1
|
|
|
|
# The network services received from the peer
|
|
self.nServices = 0
|
|
|
|
def peer_connect(self, *args, services=NODE_NETWORK|NODE_WITNESS, send_version=True, **kwargs):
|
|
create_conn = super().peer_connect(*args, **kwargs)
|
|
|
|
if send_version:
|
|
# Send a version msg
|
|
vt = msg_version()
|
|
vt.nServices = services
|
|
vt.addrTo.ip = self.dstaddr
|
|
vt.addrTo.port = self.dstport
|
|
vt.addrFrom.ip = "0.0.0.0"
|
|
vt.addrFrom.port = 0
|
|
self.on_connection_send_msg = vt # Will be sent soon after connection_made
|
|
|
|
return create_conn
|
|
|
|
# Message receiving methods
|
|
|
|
def on_message(self, message):
|
|
"""Receive message and dispatch message to appropriate callback.
|
|
|
|
We keep a count of how many of each message type has been received
|
|
and the most recent message of each type."""
|
|
with mininode_lock:
|
|
try:
|
|
command = message.command.decode('ascii')
|
|
self.message_count[command] += 1
|
|
self.last_message[command] = message
|
|
getattr(self, 'on_' + command)(message)
|
|
except:
|
|
print("ERROR delivering %s (%s)" % (repr(message), sys.exc_info()[0]))
|
|
raise
|
|
|
|
# Callback methods. Can be overridden by subclasses in individual test
|
|
# cases to provide custom message handling behaviour.
|
|
|
|
def on_open(self):
|
|
pass
|
|
|
|
def on_close(self):
|
|
pass
|
|
|
|
def on_addr(self, message): pass
|
|
def on_block(self, message): pass
|
|
def on_blocktxn(self, message): pass
|
|
def on_cmpctblock(self, message): pass
|
|
def on_feefilter(self, message): pass
|
|
def on_getaddr(self, message): pass
|
|
def on_getblocks(self, message): pass
|
|
def on_getblocktxn(self, message): pass
|
|
def on_getdata(self, message): pass
|
|
def on_getheaders(self, message): pass
|
|
def on_headers(self, message): pass
|
|
def on_mempool(self, message): pass
|
|
def on_pong(self, message): pass
|
|
def on_reject(self, message): pass
|
|
def on_sendcmpct(self, message): pass
|
|
def on_sendheaders(self, message): pass
|
|
def on_tx(self, message): pass
|
|
|
|
def on_inv(self, message):
|
|
want = msg_getdata()
|
|
for i in message.inv:
|
|
if i.type != 0:
|
|
want.inv.append(i)
|
|
if len(want.inv):
|
|
self.send_message(want)
|
|
|
|
def on_ping(self, message):
|
|
self.send_message(msg_pong(message.nonce))
|
|
|
|
def on_verack(self, message):
|
|
self.verack_received = True
|
|
|
|
def on_version(self, message):
|
|
assert message.nVersion >= MIN_VERSION_SUPPORTED, "Version {} received. Test framework only supports versions greater than {}".format(message.nVersion, MIN_VERSION_SUPPORTED)
|
|
self.send_message(msg_verack())
|
|
self.nServices = message.nServices
|
|
|
|
# Connection helper methods
|
|
|
|
def wait_for_disconnect(self, timeout=60):
|
|
test_function = lambda: not self.is_connected
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
# Message receiving helper methods
|
|
|
|
def wait_for_block(self, blockhash, timeout=60):
|
|
test_function = lambda: self.last_message.get("block") and self.last_message["block"].block.rehash() == blockhash
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
def wait_for_getdata(self, timeout=60):
|
|
"""Waits for a getdata message.
|
|
|
|
Receiving any getdata message will satisfy the predicate. the last_message["getdata"]
|
|
value must be explicitly cleared before calling this method, or this will return
|
|
immediately with success. TODO: change this method to take a hash value and only
|
|
return true if the correct block/tx has been requested."""
|
|
test_function = lambda: self.last_message.get("getdata")
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
def wait_for_getheaders(self, timeout=60):
|
|
"""Waits for a getheaders message.
|
|
|
|
Receiving any getheaders message will satisfy the predicate. the last_message["getheaders"]
|
|
value must be explicitly cleared before calling this method, or this will return
|
|
immediately with success. TODO: change this method to take a hash value and only
|
|
return true if the correct block header has been requested."""
|
|
test_function = lambda: self.last_message.get("getheaders")
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
def wait_for_inv(self, expected_inv, timeout=60):
|
|
"""Waits for an INV message and checks that the first inv object in the message was as expected."""
|
|
if len(expected_inv) > 1:
|
|
raise NotImplementedError("wait_for_inv() will only verify the first inv object")
|
|
test_function = lambda: self.last_message.get("inv") and \
|
|
self.last_message["inv"].inv[0].type == expected_inv[0].type and \
|
|
self.last_message["inv"].inv[0].hash == expected_inv[0].hash
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
def wait_for_verack(self, timeout=60):
|
|
test_function = lambda: self.message_count["verack"]
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
|
|
# Message sending helper functions
|
|
|
|
def send_and_ping(self, message):
|
|
self.send_message(message)
|
|
self.sync_with_ping()
|
|
|
|
# Sync up with the node
|
|
def sync_with_ping(self, timeout=60):
|
|
self.send_message(msg_ping(nonce=self.ping_counter))
|
|
test_function = lambda: self.last_message.get("pong") and self.last_message["pong"].nonce == self.ping_counter
|
|
wait_until(test_function, timeout=timeout, lock=mininode_lock)
|
|
self.ping_counter += 1
|
|
|
|
|
|
# One lock for synchronizing all data access between the network event loop (see
|
|
# NetworkThread below) and the thread running the test logic. For simplicity,
|
|
# P2PConnection acquires this lock whenever delivering a message to a P2PInterface.
|
|
# This lock should be acquired in the thread running the test logic to synchronize
|
|
# access to any data shared with the P2PInterface or P2PConnection.
|
|
mininode_lock = threading.RLock()
|
|
|
|
|
|
class NetworkThread(threading.Thread):
|
|
network_event_loop = None
|
|
|
|
def __init__(self):
|
|
super().__init__(name="NetworkThread")
|
|
# There is only one event loop and no more than one thread must be created
|
|
assert not self.network_event_loop
|
|
|
|
NetworkThread.network_event_loop = asyncio.new_event_loop()
|
|
|
|
def run(self):
|
|
"""Start the network thread."""
|
|
self.network_event_loop.run_forever()
|
|
|
|
def close(self, timeout=10):
|
|
"""Close the connections and network event loop."""
|
|
self.network_event_loop.call_soon_threadsafe(self.network_event_loop.stop)
|
|
wait_until(lambda: not self.network_event_loop.is_running(), timeout=timeout)
|
|
self.network_event_loop.close()
|
|
self.join(timeout)
|
|
|
|
|
|
class P2PDataStore(P2PInterface):
|
|
"""A P2P data store class.
|
|
|
|
Keeps a block and transaction store and responds correctly to getdata and getheaders requests."""
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.reject_code_received = None
|
|
self.reject_reason_received = None
|
|
# store of blocks. key is block hash, value is a CBlock object
|
|
self.block_store = {}
|
|
self.last_block_hash = ''
|
|
# store of txs. key is txid, value is a CTransaction object
|
|
self.tx_store = {}
|
|
self.getdata_requests = []
|
|
|
|
def on_getdata(self, message):
|
|
"""Check for the tx/block in our stores and if found, reply with an inv message."""
|
|
for inv in message.inv:
|
|
self.getdata_requests.append(inv.hash)
|
|
if (inv.type & MSG_TYPE_MASK) == MSG_TX and inv.hash in self.tx_store.keys():
|
|
self.send_message(msg_tx(self.tx_store[inv.hash]))
|
|
elif (inv.type & MSG_TYPE_MASK) == MSG_BLOCK and inv.hash in self.block_store.keys():
|
|
self.send_message(msg_block(self.block_store[inv.hash]))
|
|
else:
|
|
logger.debug('getdata message type {} received.'.format(hex(inv.type)))
|
|
|
|
def on_getheaders(self, message):
|
|
"""Search back through our block store for the locator, and reply with a headers message if found."""
|
|
|
|
locator, hash_stop = message.locator, message.hashstop
|
|
|
|
# Assume that the most recent block added is the tip
|
|
if not self.block_store:
|
|
return
|
|
|
|
headers_list = [self.block_store[self.last_block_hash]]
|
|
maxheaders = 2000
|
|
while headers_list[-1].sha256 not in locator.vHave:
|
|
# Walk back through the block store, adding headers to headers_list
|
|
# as we go.
|
|
prev_block_hash = headers_list[-1].hashPrevBlock
|
|
if prev_block_hash in self.block_store:
|
|
prev_block_header = CBlockHeader(self.block_store[prev_block_hash])
|
|
headers_list.append(prev_block_header)
|
|
if prev_block_header.sha256 == hash_stop:
|
|
# if this is the hashstop header, stop here
|
|
break
|
|
else:
|
|
logger.debug('block hash {} not found in block store'.format(hex(prev_block_hash)))
|
|
break
|
|
|
|
# Truncate the list if there are too many headers
|
|
headers_list = headers_list[:-maxheaders - 1:-1]
|
|
response = msg_headers(headers_list)
|
|
|
|
if response is not None:
|
|
self.send_message(response)
|
|
|
|
def on_reject(self, message):
|
|
"""Store reject reason and code for testing."""
|
|
self.reject_code_received = message.code
|
|
self.reject_reason_received = message.reason
|
|
|
|
def send_blocks_and_test(self, blocks, rpc, success=True, request_block=True, reject_code=None, reject_reason=None, timeout=60):
|
|
"""Send blocks to test node and test whether the tip advances.
|
|
|
|
- add all blocks to our block_store
|
|
- send a headers message for the final block
|
|
- the on_getheaders handler will ensure that any getheaders are responded to
|
|
- if request_block is True: wait for getdata for each of the blocks. The on_getdata handler will
|
|
ensure that any getdata messages are responded to
|
|
- if success is True: assert that the node's tip advances to the most recent block
|
|
- if success is False: assert that the node's tip doesn't advance
|
|
- if reject_code and reject_reason are set: assert that the correct reject message is received"""
|
|
|
|
with mininode_lock:
|
|
self.reject_code_received = None
|
|
self.reject_reason_received = None
|
|
|
|
for block in blocks:
|
|
self.block_store[block.sha256] = block
|
|
self.last_block_hash = block.sha256
|
|
|
|
self.send_message(msg_headers([CBlockHeader(blocks[-1])]))
|
|
|
|
if request_block:
|
|
wait_until(lambda: blocks[-1].sha256 in self.getdata_requests, timeout=timeout, lock=mininode_lock)
|
|
|
|
if success:
|
|
wait_until(lambda: rpc.getbestblockhash() == blocks[-1].hash, timeout=timeout)
|
|
else:
|
|
assert rpc.getbestblockhash() != blocks[-1].hash
|
|
|
|
if reject_code is not None:
|
|
wait_until(lambda: self.reject_code_received == reject_code, lock=mininode_lock)
|
|
if reject_reason is not None:
|
|
wait_until(lambda: self.reject_reason_received == reject_reason, lock=mininode_lock)
|
|
|
|
def send_txs_and_test(self, txs, rpc, success=True, expect_disconnect=False, reject_code=None, reject_reason=None):
|
|
"""Send txs to test node and test whether they're accepted to the mempool.
|
|
|
|
- add all txs to our tx_store
|
|
- send tx messages for all txs
|
|
- if success is True/False: assert that the txs are/are not accepted to the mempool
|
|
- if expect_disconnect is True: Skip the sync with ping
|
|
- if reject_code and reject_reason are set: assert that the correct reject message is received."""
|
|
|
|
with mininode_lock:
|
|
self.reject_code_received = None
|
|
self.reject_reason_received = None
|
|
|
|
for tx in txs:
|
|
self.tx_store[tx.sha256] = tx
|
|
|
|
for tx in txs:
|
|
self.send_message(msg_tx(tx))
|
|
|
|
if expect_disconnect:
|
|
self.wait_for_disconnect()
|
|
else:
|
|
self.sync_with_ping()
|
|
|
|
raw_mempool = rpc.getrawmempool()
|
|
if success:
|
|
# Check that all txs are now in the mempool
|
|
for tx in txs:
|
|
assert tx.hash in raw_mempool, "{} not found in mempool".format(tx.hash)
|
|
else:
|
|
# Check that none of the txs are now in the mempool
|
|
for tx in txs:
|
|
assert tx.hash not in raw_mempool, "{} tx found in mempool".format(tx.hash)
|
|
|
|
if reject_code is not None:
|
|
wait_until(lambda: self.reject_code_received == reject_code, lock=mininode_lock)
|
|
if reject_reason is not None:
|
|
wait_until(lambda: self.reject_reason_received == reject_reason, lock=mininode_lock)
|