diff options
Diffstat (limited to 'test/functional/test_framework/mininode.py')
| -rwxr-xr-x | test/functional/test_framework/mininode.py | 200 |
1 files changed, 72 insertions, 128 deletions
diff --git a/test/functional/test_framework/mininode.py b/test/functional/test_framework/mininode.py index 7c2125a177..29bf33fa5b 100755 --- a/test/functional/test_framework/mininode.py +++ b/test/functional/test_framework/mininode.py @@ -13,11 +13,10 @@ 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 asyncore +import asyncio from collections import defaultdict from io import BytesIO import logging -import socket import struct import sys import threading @@ -57,7 +56,8 @@ MAGIC_BYTES = { "regtest": b"\xfa\xbf\xb5\xda", # regtest } -class P2PConnection(asyncore.dispatcher): + +class P2PConnection(asyncio.Protocol): """A low-level connection object to a node's P2P interface. This class is responsible for: @@ -71,68 +71,59 @@ class P2PConnection(asyncore.dispatcher): sub-classed and the on_message() callback overridden.""" def __init__(self): - # All P2PConnections must be created before starting the NetworkThread. - # assert that the network thread is not running. - assert not network_thread_running() + # The underlying transport of the connection. + # Should only call methods on this from the NetworkThread, c.f. call_soon_threadsafe + self._transport = None - super().__init__(map=mininode_socket_map) + @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 - self.create_socket(socket.AF_INET, socket.SOCK_STREAM) - self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) - self.sendbuf = b"" + # The initial message to send after the connection was made: + self.on_connection_send_msg = None self.recvbuf = b"" - self.state = "connecting" self.network = net - self.disconnect = False - logger.debug('Connecting to Bitcoin Node: %s:%d' % (self.dstaddr, self.dstport)) - try: - self.connect((dstaddr, dstport)) - except: - self.handle_close() + 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. - if self.state == "connected": - self.disconnect_node() + NetworkThread.network_event_loop.call_soon_threadsafe(lambda: self._transport and self._transport.abort()) # Connection and disconnection methods - def handle_connect(self): - """asyncore callback when a connection is opened.""" - if self.state != "connected": - logger.debug("Connected & Listening: %s:%d" % (self.dstaddr, self.dstport)) - self.state = "connected" - self.on_open() - - def handle_close(self): - """asyncore callback when a connection is closed.""" - logger.debug("Closing connection to: %s:%d" % (self.dstaddr, self.dstport)) - self.state = "closed" + 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.sendbuf = b"" - try: - self.close() - except: - pass self.on_close() - def disconnect_node(self): - """Disconnect the p2p connection. - - Called by the test logic thread. Causes the p2p connection - to be disconnected on the next iteration of the asyncore loop.""" - self.disconnect = True - # Socket read methods - def handle_read(self): - """asyncore callback when data is read from the socket.""" - t = self.recv(8192) + def data_received(self, t): + """asyncio callback when data is read from the socket.""" if len(t) > 0: self.recvbuf += t self._on_data() @@ -179,39 +170,21 @@ class P2PConnection(asyncore.dispatcher): # Socket write methods - def writable(self): - """asyncore method to determine whether the handle_write() callback should be called on the next loop.""" - with mininode_lock: - pre_connection = self.state == "connecting" - length = len(self.sendbuf) - return (length > 0 or pre_connection) - - def handle_write(self): - """asyncore callback when data should be written to the socket.""" - with mininode_lock: - # asyncore does not expose socket connection, only the first read/write - # event, thus we must check connection manually here to know when we - # actually connect - if self.state == "connecting": - self.handle_connect() - if not self.writable(): - return - - try: - sent = self.send(self.sendbuf) - except: - self.handle_close() - return - self.sendbuf = self.sendbuf[sent:] - - def send_message(self, message, pushbuf=False): + 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 self.state != "connected" and not pushbuf: - raise IOError('Not connected, no pushbuf') + if not self.is_connected: + raise IOError('Not connected') self._log_message("send", message) + tmsg = self._build_message(message) + NetworkThread.network_event_loop.call_soon_threadsafe(lambda: self._transport and self._transport.write(tmsg)) + + # Class utility methods + + def _build_message(self, message): + """Build a serialized P2P message""" command = message.command data = message.serialize() tmsg = MAGIC_BYTES[self.network] @@ -222,17 +195,7 @@ class P2PConnection(asyncore.dispatcher): h = sha256(th) tmsg += h[:4] tmsg += data - with mininode_lock: - if (len(self.sendbuf) == 0 and not pushbuf): - try: - sent = self.send(tmsg) - self.sendbuf = tmsg[sent:] - except BlockingIOError: - self.sendbuf = tmsg - else: - self.sendbuf += tmsg - - # Class utility methods + return tmsg def _log_message(self, direction, msg): """Logs a message being sent or received over the connection.""" @@ -270,7 +233,7 @@ class P2PInterface(P2PConnection): self.nServices = 0 def peer_connect(self, *args, services=NODE_NETWORK|NODE_WITNESS, send_version=True, **kwargs): - super().peer_connect(*args, **kwargs) + create_conn = super().peer_connect(*args, **kwargs) if send_version: # Send a version msg @@ -280,7 +243,9 @@ class P2PInterface(P2PConnection): vt.addrTo.port = self.dstport vt.addrFrom.ip = "0.0.0.0" vt.addrFrom.port = 0 - self.send_message(vt, True) + self.on_connection_send_msg = vt # Will be sent soon after connection_made + + return create_conn # Message receiving methods @@ -348,7 +313,7 @@ class P2PInterface(P2PConnection): # Connection helper methods def wait_for_disconnect(self, timeout=60): - test_function = lambda: self.state != "connected" + test_function = lambda: not self.is_connected wait_until(test_function, timeout=timeout, lock=mininode_lock) # Message receiving helper methods @@ -404,56 +369,35 @@ class P2PInterface(P2PConnection): self.ping_counter += 1 -# Keep our own socket map for asyncore, so that we can track disconnects -# ourselves (to work around an issue with closing an asyncore socket when -# using select) -mininode_socket_map = dict() - -# One lock for synchronizing all data access between the networking thread (see +# 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, -# and whenever adding anything to the send buffer (in send_message()). This -# lock should be acquired in the thread running the test logic to synchronize +# 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): - while mininode_socket_map: - # We check for whether to disconnect outside of the asyncore - # loop to work around the behavior of asyncore when using - # select - disconnected = [] - for fd, obj in mininode_socket_map.items(): - if obj.disconnect: - disconnected.append(obj) - [obj.handle_close() for obj in disconnected] - asyncore.loop(0.1, use_poll=True, map=mininode_socket_map, count=1) - logger.debug("Network thread closing") - -def network_thread_start(): - """Start the network thread.""" - # Only one network thread may run at a time - assert not network_thread_running() - - NetworkThread().start() - -def network_thread_running(): - """Return whether the network thread is running.""" - return any([thread.name == "NetworkThread" for thread in threading.enumerate()]) - -def network_thread_join(timeout=10): - """Wait timeout seconds for the network thread to terminate. - - Throw if the network thread doesn't terminate in timeout seconds.""" - network_threads = [thread for thread in threading.enumerate() if thread.name == "NetworkThread"] - assert len(network_threads) <= 1 - for thread in network_threads: - thread.join(timeout) - assert not thread.is_alive() + """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. |