from __future__ import division import math import random import time from twisted.internet import defer, protocol, reactor from twisted.python import failure, log import p2pool from p2pool import data as p2pool_data from p2pool.bitcoin import data as bitcoin_data from p2pool.util import deferral, p2protocol, pack, variable class PeerMisbehavingError(Exception): pass class Protocol(p2protocol.Protocol): def __init__(self, node, incoming): p2protocol.Protocol.__init__(self, node.net.PREFIX, 1000000, node.traffic_happened) self.node = node self.incoming = incoming self.other_version = None self.connected2 = False def connectionMade(self): p2protocol.Protocol.connectionMade(self) self.factory.proto_made_connection(self) self.addr = self.transport.getPeer().host, self.transport.getPeer().port self.send_version( version=4, services=0, addr_to=dict( services=0, address=self.transport.getPeer().host, port=self.transport.getPeer().port, ), addr_from=dict( services=0, address=self.transport.getHost().host, port=self.transport.getHost().port, ), nonce=self.node.nonce, sub_version=p2pool.__version__, mode=1, best_share_hash=self.node.best_share_hash_func(), ) self.timeout_delayed = reactor.callLater(10, self._connect_timeout) self.get_shares = deferral.GenericDeferrer( max_id=2**256, func=lambda id, hashes, parents, stops: self.send_sharereq(id=id, hashes=hashes, parents=parents, stops=stops), timeout=15, on_timeout=self.transport.loseConnection, ) def _connect_timeout(self): self.timeout_delayed = None print 'Handshake timed out, disconnecting from %s:%i' % self.addr self.transport.loseConnection() def packetReceived(self, command, payload2): try: if command != 'version' and not self.connected2: raise PeerMisbehavingError('first message was not version message') p2protocol.Protocol.packetReceived(self, command, payload2) except PeerMisbehavingError, e: print 'Peer %s:%i misbehaving, will drop and ban. Reason:' % self.addr, e.message self.badPeerHappened() def badPeerHappened(self): if p2pool.DEBUG: print "Bad peer banned:", self.addr self.transport.loseConnection() self.node.bans[self.transport.getPeer().host] = time.time() + 60*60 def _timeout(self): self.timeout_delayed = None print 'Connection timed out, disconnecting from %s:%i' % self.addr self.transport.loseConnection() message_version = pack.ComposedType([ ('version', pack.IntType(32)), ('services', pack.IntType(64)), ('addr_to', bitcoin_data.address_type), ('addr_from', bitcoin_data.address_type), ('nonce', pack.IntType(64)), ('sub_version', pack.VarStrType()), ('mode', pack.IntType(32)), # always 1 for legacy compatibility ('best_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))), ]) def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash): if self.other_version is not None: raise PeerMisbehavingError('more than one version message') if version < 4: raise PeerMisbehavingError('peer too old') self.other_version = version self.other_sub_version = sub_version[:512] self.other_services = services if nonce == self.node.nonce: raise PeerMisbehavingError('was connected to self') if nonce in self.node.peers: if p2pool.DEBUG: print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr self.transport.loseConnection() return self.nonce = nonce self.connected2 = True self.timeout_delayed.cancel() self.timeout_delayed = reactor.callLater(100, self._timeout) old_dataReceived = self.dataReceived def new_dataReceived(data): if self.timeout_delayed is not None: self.timeout_delayed.reset(100) old_dataReceived(data) self.dataReceived = new_dataReceived self.factory.proto_connected(self) self._stop_thread = deferral.run_repeatedly(lambda: [ self.send_ping(), random.expovariate(1/100)][-1]) self._stop_thread2 = deferral.run_repeatedly(lambda: [ self.send_addrme(port=self.node.port), random.expovariate(1/(100*len(self.node.peers) + 1))][-1]) if best_share_hash is not None: self.node.handle_share_hashes([best_share_hash], self) message_ping = pack.ComposedType([]) def handle_ping(self): pass message_addrme = pack.ComposedType([ ('port', pack.IntType(16)), ]) def handle_addrme(self, port): host = self.transport.getPeer().host #print 'addrme from', host, port if host == '127.0.0.1': if random.random() < .8 and self.node.peers: random.choice(self.node.peers.values()).send_addrme(port=port) # services... else: self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time())) if random.random() < .8 and self.node.peers: random.choice(self.node.peers.values()).send_addrs(addrs=[ dict( address=dict( services=self.other_services, address=host, port=port, ), timestamp=int(time.time()), ), ]) message_addrs = pack.ComposedType([ ('addrs', pack.ListType(pack.ComposedType([ ('timestamp', pack.IntType(64)), ('address', bitcoin_data.address_type), ]))), ]) def handle_addrs(self, addrs): for addr_record in addrs: self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp'])) if random.random() < .8 and self.node.peers: random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record]) message_getaddrs = pack.ComposedType([ ('count', pack.IntType(32)), ]) def handle_getaddrs(self, count): if count > 100: count = 100 self.send_addrs(addrs=[ dict( timestamp=int(self.node.addr_store[host, port][2]), address=dict( services=self.node.addr_store[host, port][0], address=host, port=port, ), ) for host, port in self.node.get_good_peers(count) ]) message_shares = pack.ComposedType([ ('shares', pack.ListType(p2pool_data.share_type)), ]) def handle_shares(self, shares): self.node.handle_shares([p2pool_data.load_share(share, self.node.net, self) for share in shares if share['type'] not in [6, 7]], self) def sendShares(self, shares): def att(f, **kwargs): try: return f(**kwargs) except p2protocol.TooLong: att(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems())) return att(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems())) if shares: return att(self.send_shares, shares=[share.as_share() for share in shares]) else: return defer.succeed(None) message_sharereq = pack.ComposedType([ ('id', pack.IntType(256)), ('hashes', pack.ListType(pack.IntType(256))), ('parents', pack.VarIntType()), ('stops', pack.ListType(pack.IntType(256))), ]) def handle_sharereq(self, id, hashes, parents, stops): shares = self.node.handle_get_shares(hashes, parents, stops, self) try: self.send_sharereply(id=id, result='good', shares=[share.as_share() for share in shares]) except p2protocol.TooLong: self.send_sharereply(id=id, result='too long', shares=[]) message_sharereply = pack.ComposedType([ ('id', pack.IntType(256)), ('result', pack.EnumType(pack.VarIntType(), {0: 'good', 1: 'too long', 2: 'unk2', 3: 'unk3', 4: 'unk4', 5: 'unk5', 6: 'unk6'})), ('shares', pack.ListType(p2pool_data.share_type)), ]) def handle_sharereply(self, id, result, shares): if result == 'good': res = [p2pool_data.load_share(share, self.node.net, self) for share in shares if share['type'] not in [6, 7]] else: res = failure.Failure("sharereply result: " + result) self.get_shares.got_response(id, res) message_bestblock = pack.ComposedType([ ('header', bitcoin_data.block_header_type), ]) def handle_bestblock(self, header): self.node.handle_bestblock(header, self) def connectionLost(self, reason): if self.timeout_delayed is not None: self.timeout_delayed.cancel() if self.connected2: self.factory.proto_disconnected(self, reason) self._stop_thread() self._stop_thread2() self.connected2 = False self.factory.proto_lost_connection(self, reason) if p2pool.DEBUG: print "Peer connection lost:", self.addr, reason self.get_shares.respond_all(reason) @defer.inlineCallbacks def do_ping(self): start = reactor.seconds() yield self.get_shares(hashes=[0], parents=0, stops=[]) end = reactor.seconds() defer.returnValue(end - start) class ServerFactory(protocol.ServerFactory): def __init__(self, node, max_conns): self.node = node self.max_conns = max_conns self.conns = {} self.running = False def buildProtocol(self, addr): if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3: return None if addr.host in self.node.bans and self.node.bans[addr.host] > time.time(): return None p = Protocol(self.node, True) p.factory = self if p2pool.DEBUG: print "Got peer connection from:", addr return p def _host_to_ident(self, host): a, b, c, d = host.split('.') return a, b def proto_made_connection(self, proto): ident = self._host_to_ident(proto.transport.getPeer().host) self.conns[ident] = self.conns.get(ident, 0) + 1 def proto_lost_connection(self, proto, reason): ident = self._host_to_ident(proto.transport.getPeer().host) self.conns[ident] -= 1 if not self.conns[ident]: del self.conns[ident] def proto_connected(self, proto): self.node.got_conn(proto) def proto_disconnected(self, proto, reason): self.node.lost_conn(proto, reason) def start(self): assert not self.running self.running = True def attempt_listen(): if self.running: self.listen_port = reactor.listenTCP(self.node.port, self) deferral.retry('Error binding to P2P port:', traceback=False)(attempt_listen)() def stop(self): assert self.running self.running = False return self.listen_port.stopListening() class ClientFactory(protocol.ClientFactory): def __init__(self, node, desired_conns, max_attempts): self.node = node self.desired_conns = desired_conns self.max_attempts = max_attempts self.attempts = set() self.conns = set() self.running = False def _host_to_ident(self, host): a, b, c, d = host.split('.') return a, b def buildProtocol(self, addr): p = Protocol(self.node, False) p.factory = self return p def startedConnecting(self, connector): ident = self._host_to_ident(connector.getDestination().host) if ident in self.attempts: raise AssertionError('already have attempt') self.attempts.add(ident) def clientConnectionFailed(self, connector, reason): self.attempts.remove(self._host_to_ident(connector.getDestination().host)) def clientConnectionLost(self, connector, reason): self.attempts.remove(self._host_to_ident(connector.getDestination().host)) def proto_made_connection(self, proto): pass def proto_lost_connection(self, proto, reason): pass def proto_connected(self, proto): self.conns.add(proto) self.node.got_conn(proto) def proto_disconnected(self, proto, reason): self.conns.remove(proto) self.node.lost_conn(proto, reason) def start(self): assert not self.running self.running = True self._stop_thinking = deferral.run_repeatedly(self._think) def stop(self): assert self.running self.running = False self._stop_thinking() def _think(self): try: if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store: (host, port), = self.node.get_good_peers(1) if self._host_to_ident(host) in self.attempts: pass elif host in self.node.bans and self.node.bans[host] > time.time(): pass else: #print 'Trying to connect to', host, port reactor.connectTCP(host, port, self, timeout=5) except: log.err() return random.expovariate(1/1) class SingleClientFactory(protocol.ReconnectingClientFactory): def __init__(self, node): self.node = node def buildProtocol(self, addr): p = Protocol(self.node, incoming=False) p.factory = self return p def proto_made_connection(self, proto): pass def proto_lost_connection(self, proto, reason): pass def proto_connected(self, proto): self.resetDelay() self.node.got_conn(proto) def proto_disconnected(self, proto, reason): self.node.lost_conn(proto, reason) class Node(object): def __init__(self, best_share_hash_func, port, net, addr_store={}, connect_addrs=set(), desired_outgoing_conns=10, max_outgoing_attempts=30, max_incoming_conns=50, preferred_storage=1000, traffic_happened=variable.Event()): self.best_share_hash_func = best_share_hash_func self.port = port self.net = net self.addr_store = dict(addr_store) self.connect_addrs = connect_addrs self.preferred_storage = preferred_storage self.traffic_happened = traffic_happened self.nonce = random.randrange(2**64) self.peers = {} self.bans = {} # address -> end_time self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts) self.serverfactory = ServerFactory(self, max_incoming_conns) self.running = False def start(self): if self.running: raise ValueError('already running') self.clientfactory.start() self.serverfactory.start() self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs] self.running = True self._stop_thinking = deferral.run_repeatedly(self._think) def _think(self): try: if len(self.addr_store) < self.preferred_storage and self.peers: random.choice(self.peers.values()).send_getaddrs(count=8) except: log.err() return random.expovariate(1/20) @defer.inlineCallbacks def stop(self): if not self.running: raise ValueError('already stopped') self.running = False self._stop_thinking() yield self.clientfactory.stop() yield self.serverfactory.stop() for singleclientconnector in self.singleclientconnectors: yield singleclientconnector.factory.stopTrying() yield singleclientconnector.disconnect() del self.singleclientconnectors def got_conn(self, conn): if conn.nonce in self.peers: raise ValueError('already have peer') self.peers[conn.nonce] = conn print '%s connection to peer %s:%i established. p2pool version: %i %r' % ('Incoming' if conn.incoming else 'Outgoing', conn.addr[0], conn.addr[1], conn.other_version, conn.other_sub_version) def lost_conn(self, conn, reason): if conn.nonce not in self.peers: raise ValueError('''don't have peer''') if conn is not self.peers[conn.nonce]: raise ValueError('wrong conn') del self.peers[conn.nonce] print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage()) def got_addr(self, (host, port), services, timestamp): if (host, port) in self.addr_store: old_services, old_first_seen, old_last_seen = self.addr_store[host, port] self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp) else: self.addr_store[host, port] = services, timestamp, timestamp def handle_shares(self, shares, peer): print 'handle_shares', (shares, peer) def handle_share_hashes(self, hashes, peer): print 'handle_share_hashes', (hashes, peer) def handle_get_shares(self, hashes, parents, stops, peer): print 'handle_get_shares', (hashes, parents, stops, peer) def handle_bestblock(self, header, peer): print 'handle_bestblock', header def get_good_peers(self, max_count): t = time.time() return [x[0] for x in sorted(self.addr_store.iteritems(), key=lambda (k, (services, first_seen, last_seen)): -math.log(max(3600, last_seen - first_seen))/math.log(max(3600, t - last_seen))*random.expovariate(1) )][:max_count]