1 from __future__ import division
8 from twisted.internet import defer, protocol, reactor
9 from twisted.python import failure, log
12 from p2pool import data as p2pool_data
13 from p2pool.bitcoin import data as bitcoin_data
14 from p2pool.util import deferral, p2protocol, pack, variable
16 class PeerMisbehavingError(Exception):
20 def fragment(f, **kwargs):
23 except p2protocol.TooLong:
24 fragment(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
25 fragment(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
27 class Protocol(p2protocol.Protocol):
28 max_remembered_txs_size = 2500000
30 def __init__(self, node, incoming):
31 p2protocol.Protocol.__init__(self, node.net.PREFIX, 1000000, node.traffic_happened)
33 self.incoming = incoming
35 self.other_version = None
36 self.connected2 = False
38 def connectionMade(self):
39 self.factory.proto_made_connection(self)
41 self.connection_lost_event = variable.Event()
43 self.addr = self.transport.getPeer().host, self.transport.getPeer().port
50 address=self.transport.getPeer().host,
51 port=self.transport.getPeer().port,
55 address=self.transport.getHost().host,
56 port=self.transport.getHost().port,
58 nonce=self.node.nonce,
59 sub_version=p2pool.__version__,
61 best_share_hash=self.node.best_share_hash_func(),
64 self.timeout_delayed = reactor.callLater(10, self._connect_timeout)
66 self.get_shares = deferral.GenericDeferrer(
68 func=lambda id, hashes, parents, stops: self.send_sharereq(id=id, hashes=hashes, parents=parents, stops=stops),
70 on_timeout=self.disconnect,
73 self.remote_tx_hashes = set() # view of peer's known_txs # not actually initially empty, but sending txs instead of tx hashes won't hurt
74 self.remote_remembered_txs_size = 0
76 self.remembered_txs = {} # view of peer's mining_txs
77 self.remembered_txs_size = 0
78 self.known_txs_cache = {}
80 def _connect_timeout(self):
81 self.timeout_delayed = None
82 print 'Handshake timed out, disconnecting from %s:%i' % self.addr
85 def packetReceived(self, command, payload2):
87 if command != 'version' and not self.connected2:
88 raise PeerMisbehavingError('first message was not version message')
89 p2protocol.Protocol.packetReceived(self, command, payload2)
90 except PeerMisbehavingError, e:
91 print 'Peer %s:%i misbehaving, will drop and ban. Reason:' % self.addr, e.message
92 self.badPeerHappened()
94 def badPeerHappened(self):
96 print "Bad peer banned:", self.addr
98 if self.transport.getPeer().host != '127.0.0.1': # never ban localhost
99 self.node.bans[self.transport.getPeer().host] = time.time() + 60*60
102 self.timeout_delayed = None
103 print 'Connection timed out, disconnecting from %s:%i' % self.addr
106 message_version = pack.ComposedType([
107 ('version', pack.IntType(32)),
108 ('services', pack.IntType(64)),
109 ('addr_to', bitcoin_data.address_type),
110 ('addr_from', bitcoin_data.address_type),
111 ('nonce', pack.IntType(64)),
112 ('sub_version', pack.VarStrType()),
113 ('mode', pack.IntType(32)), # always 1 for legacy compatibility
114 ('best_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
116 def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
117 if self.other_version is not None:
118 raise PeerMisbehavingError('more than one version message')
120 raise PeerMisbehavingError('peer too old')
122 self.other_version = version
123 self.other_sub_version = sub_version[:512]
124 self.other_services = services
126 if nonce == self.node.nonce:
127 raise PeerMisbehavingError('was connected to self')
128 if nonce in self.node.peers:
130 print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
135 self.connected2 = True
137 self.timeout_delayed.cancel()
138 self.timeout_delayed = reactor.callLater(100, self._timeout)
140 old_dataReceived = self.dataReceived
141 def new_dataReceived(data):
142 if self.timeout_delayed is not None:
143 self.timeout_delayed.reset(100)
144 old_dataReceived(data)
145 self.dataReceived = new_dataReceived
147 self.factory.proto_connected(self)
149 self._stop_thread = deferral.run_repeatedly(lambda: [
151 random.expovariate(1/100)][-1])
153 self._stop_thread2 = deferral.run_repeatedly(lambda: [
154 self.send_addrme(port=self.node.serverfactory.listen_port.getHost().port) if self.node.serverfactory.listen_port is not None else None,
155 random.expovariate(1/(100*len(self.node.peers) + 1))][-1])
157 if best_share_hash is not None:
158 self.node.handle_share_hashes([best_share_hash], self)
160 if self.other_version < 8:
163 def update_remote_view_of_my_known_txs(before, after):
164 added = set(after) - set(before)
165 removed = set(before) - set(after)
167 self.send_have_tx(tx_hashes=list(added))
169 self.send_losing_tx(tx_hashes=list(removed))
171 # cache forgotten txs here for a little while so latency of "losing_tx" packets doesn't cause problems
172 key = max(self.known_txs_cache) + 1 if self.known_txs_cache else 0
173 self.known_txs_cache[key] = dict((h, before[h]) for h in removed)
174 reactor.callLater(20, self.known_txs_cache.pop, key)
175 watch_id = self.node.known_txs_var.transitioned.watch(update_remote_view_of_my_known_txs)
176 self.connection_lost_event.watch(lambda: self.node.known_txs_var.transitioned.unwatch(watch_id))
178 self.send_have_tx(tx_hashes=self.node.known_txs_var.value.keys())
180 def update_remote_view_of_my_mining_txs(before, after):
181 added = set(after) - set(before)
182 removed = set(before) - set(after)
184 self.remote_remembered_txs_size += sum(100 + bitcoin_data.tx_type.packed_size(after[x]) for x in added)
185 assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
186 fragment(self.send_remember_tx, tx_hashes=[x for x in added if x in self.remote_tx_hashes], txs=[after[x] for x in added if x not in self.remote_tx_hashes])
188 self.send_forget_tx(tx_hashes=list(removed))
189 self.remote_remembered_txs_size -= sum(100 + bitcoin_data.tx_type.packed_size(before[x]) for x in removed)
190 watch_id2 = self.node.mining_txs_var.transitioned.watch(update_remote_view_of_my_mining_txs)
191 self.connection_lost_event.watch(lambda: self.node.mining_txs_var.transitioned.unwatch(watch_id2))
193 self.remote_remembered_txs_size += sum(100 + bitcoin_data.tx_type.packed_size(x) for x in self.node.mining_txs_var.value.values())
194 assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
195 fragment(self.send_remember_tx, tx_hashes=[], txs=self.node.mining_txs_var.value.values())
197 message_ping = pack.ComposedType([])
198 def handle_ping(self):
201 message_addrme = pack.ComposedType([
202 ('port', pack.IntType(16)),
204 def handle_addrme(self, port):
205 host = self.transport.getPeer().host
206 #print 'addrme from', host, port
207 if host == '127.0.0.1':
208 if random.random() < .8 and self.node.peers:
209 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
211 self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
212 if random.random() < .8 and self.node.peers:
213 random.choice(self.node.peers.values()).send_addrs(addrs=[
216 services=self.other_services,
220 timestamp=int(time.time()),
224 message_addrs = pack.ComposedType([
225 ('addrs', pack.ListType(pack.ComposedType([
226 ('timestamp', pack.IntType(64)),
227 ('address', bitcoin_data.address_type),
230 def handle_addrs(self, addrs):
231 for addr_record in addrs:
232 self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
233 if random.random() < .8 and self.node.peers:
234 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
236 message_getaddrs = pack.ComposedType([
237 ('count', pack.IntType(32)),
239 def handle_getaddrs(self, count):
242 self.send_addrs(addrs=[
244 timestamp=int(self.node.addr_store[host, port][2]),
246 services=self.node.addr_store[host, port][0],
251 self.node.get_good_peers(count)
254 message_shares = pack.ComposedType([
255 ('shares', pack.ListType(p2pool_data.share_type)),
257 def handle_shares(self, shares):
258 self.node.handle_shares([p2pool_data.load_share(share, self.node.net, self.addr) for share in shares if share['type'] >= 9], self)
260 def sendShares(self, shares, tracker, known_txs, include_txs_with=[]):
261 if self.other_version >= 8:
264 if share.hash in include_txs_with:
265 x = share.get_other_tx_hashes(tracker)
269 hashes_to_send = [x for x in tx_hashes if x not in self.node.mining_txs_var.value and x in known_txs]
271 new_remote_remembered_txs_size = self.remote_remembered_txs_size + sum(100 + bitcoin_data.tx_type.packed_size(known_txs[x]) for x in hashes_to_send)
272 if new_remote_remembered_txs_size > self.max_remembered_txs_size:
273 raise ValueError('shares have too many txs')
274 self.remote_remembered_txs_size = new_remote_remembered_txs_size
276 fragment(self.send_remember_tx, tx_hashes=[x for x in hashes_to_send if x in self.remote_tx_hashes], txs=[known_txs[x] for x in hashes_to_send if x not in self.remote_tx_hashes])
278 fragment(self.send_shares, shares=[share.as_share() for share in shares])
280 if self.other_version >= 8:
281 self.send_forget_tx(tx_hashes=hashes_to_send)
283 self.remote_remembered_txs_size -= sum(100 + bitcoin_data.tx_type.packed_size(known_txs[x]) for x in hashes_to_send)
286 message_sharereq = pack.ComposedType([
287 ('id', pack.IntType(256)),
288 ('hashes', pack.ListType(pack.IntType(256))),
289 ('parents', pack.VarIntType()),
290 ('stops', pack.ListType(pack.IntType(256))),
292 def handle_sharereq(self, id, hashes, parents, stops):
293 shares = self.node.handle_get_shares(hashes, parents, stops, self)
295 self.send_sharereply(id=id, result='good', shares=[share.as_share() for share in shares])
296 except p2protocol.TooLong:
297 self.send_sharereply(id=id, result='too long', shares=[])
299 message_sharereply = pack.ComposedType([
300 ('id', pack.IntType(256)),
301 ('result', pack.EnumType(pack.VarIntType(), {0: 'good', 1: 'too long', 2: 'unk2', 3: 'unk3', 4: 'unk4', 5: 'unk5', 6: 'unk6'})),
302 ('shares', pack.ListType(p2pool_data.share_type)),
304 def handle_sharereply(self, id, result, shares):
306 res = [p2pool_data.load_share(share, self.node.net, self.addr) for share in shares if share['type'] >= 9]
308 res = failure.Failure("sharereply result: " + result)
309 self.get_shares.got_response(id, res)
312 message_bestblock = pack.ComposedType([
313 ('header', bitcoin_data.block_header_type),
315 def handle_bestblock(self, header):
316 self.node.handle_bestblock(header, self)
319 message_have_tx = pack.ComposedType([
320 ('tx_hashes', pack.ListType(pack.IntType(256))),
322 def handle_have_tx(self, tx_hashes):
323 #assert self.remote_tx_hashes.isdisjoint(tx_hashes)
324 self.remote_tx_hashes.update(tx_hashes)
325 while len(self.remote_tx_hashes) > 10000:
326 self.remote_tx_hashes.pop()
327 message_losing_tx = pack.ComposedType([
328 ('tx_hashes', pack.ListType(pack.IntType(256))),
330 def handle_losing_tx(self, tx_hashes):
331 #assert self.remote_tx_hashes.issuperset(tx_hashes)
332 self.remote_tx_hashes.difference_update(tx_hashes)
335 message_remember_tx = pack.ComposedType([
336 ('tx_hashes', pack.ListType(pack.IntType(256))),
337 ('txs', pack.ListType(bitcoin_data.tx_type)),
339 def handle_remember_tx(self, tx_hashes, txs):
340 for tx_hash in tx_hashes:
341 if tx_hash in self.remembered_txs:
342 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
346 if tx_hash in self.node.known_txs_var.value:
347 tx = self.node.known_txs_var.value[tx_hash]
349 for cache in self.known_txs_cache.itervalues():
352 print 'Transaction %064x rescued from peer latency cache!' % (tx_hash,)
355 print >>sys.stderr, 'Peer referenced unknown transaction %064x, disconnecting' % (tx_hash,)
359 self.remembered_txs[tx_hash] = tx
360 self.remembered_txs_size += 100 + bitcoin_data.tx_type.packed_size(tx)
361 new_known_txs = dict(self.node.known_txs_var.value)
364 tx_hash = bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))
365 if tx_hash in self.remembered_txs:
366 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
370 if tx_hash in self.node.known_txs_var.value and not warned:
371 print 'Peer sent entire transaction %064x that was already received' % (tx_hash,)
374 self.remembered_txs[tx_hash] = tx
375 self.remembered_txs_size += 100 + bitcoin_data.tx_type.packed_size(tx)
376 new_known_txs[tx_hash] = tx
377 self.node.known_txs_var.set(new_known_txs)
378 if self.remembered_txs_size >= self.max_remembered_txs_size:
379 raise PeerMisbehavingError('too much transaction data stored')
380 message_forget_tx = pack.ComposedType([
381 ('tx_hashes', pack.ListType(pack.IntType(256))),
383 def handle_forget_tx(self, tx_hashes):
384 for tx_hash in tx_hashes:
385 self.remembered_txs_size -= 100 + bitcoin_data.tx_type.packed_size(self.remembered_txs[tx_hash])
386 assert self.remembered_txs_size >= 0
387 del self.remembered_txs[tx_hash]
390 def connectionLost(self, reason):
391 self.connection_lost_event.happened()
392 if self.timeout_delayed is not None:
393 self.timeout_delayed.cancel()
395 self.factory.proto_disconnected(self, reason)
398 self.connected2 = False
399 self.factory.proto_lost_connection(self, reason)
401 print "Peer connection lost:", self.addr, reason
402 self.get_shares.respond_all(reason)
404 @defer.inlineCallbacks
406 start = reactor.seconds()
407 yield self.get_shares(hashes=[0], parents=0, stops=[])
408 end = reactor.seconds()
409 defer.returnValue(end - start)
411 class ServerFactory(protocol.ServerFactory):
412 def __init__(self, node, max_conns):
414 self.max_conns = max_conns
418 self.listen_port = None
420 def buildProtocol(self, addr):
421 if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3:
423 if addr.host in self.node.bans and self.node.bans[addr.host] > time.time():
425 p = Protocol(self.node, True)
428 print "Got peer connection from:", addr
431 def _host_to_ident(self, host):
432 a, b, c, d = host.split('.')
435 def proto_made_connection(self, proto):
436 ident = self._host_to_ident(proto.transport.getPeer().host)
437 self.conns[ident] = self.conns.get(ident, 0) + 1
438 def proto_lost_connection(self, proto, reason):
439 ident = self._host_to_ident(proto.transport.getPeer().host)
440 self.conns[ident] -= 1
441 if not self.conns[ident]:
442 del self.conns[ident]
444 def proto_connected(self, proto):
445 self.node.got_conn(proto)
446 def proto_disconnected(self, proto, reason):
447 self.node.lost_conn(proto, reason)
450 assert not self.running
453 def attempt_listen():
455 self.listen_port = reactor.listenTCP(self.node.port, self)
456 deferral.retry('Error binding to P2P port:', traceback=False)(attempt_listen)()
462 return self.listen_port.stopListening()
464 class ClientFactory(protocol.ClientFactory):
465 def __init__(self, node, desired_conns, max_attempts):
467 self.desired_conns = desired_conns
468 self.max_attempts = max_attempts
470 self.attempts = set()
474 def _host_to_ident(self, host):
475 a, b, c, d = host.split('.')
478 def buildProtocol(self, addr):
479 p = Protocol(self.node, False)
483 def startedConnecting(self, connector):
484 ident = self._host_to_ident(connector.getDestination().host)
485 if ident in self.attempts:
486 raise AssertionError('already have attempt')
487 self.attempts.add(ident)
489 def clientConnectionFailed(self, connector, reason):
490 self.attempts.remove(self._host_to_ident(connector.getDestination().host))
492 def clientConnectionLost(self, connector, reason):
493 self.attempts.remove(self._host_to_ident(connector.getDestination().host))
495 def proto_made_connection(self, proto):
497 def proto_lost_connection(self, proto, reason):
500 def proto_connected(self, proto):
501 self.conns.add(proto)
502 self.node.got_conn(proto)
503 def proto_disconnected(self, proto, reason):
504 self.conns.remove(proto)
505 self.node.lost_conn(proto, reason)
508 assert not self.running
510 self._stop_thinking = deferral.run_repeatedly(self._think)
514 self._stop_thinking()
518 if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store:
519 (host, port), = self.node.get_good_peers(1)
521 if self._host_to_ident(host) in self.attempts:
523 elif host in self.node.bans and self.node.bans[host] > time.time():
526 #print 'Trying to connect to', host, port
527 reactor.connectTCP(host, port, self, timeout=5)
531 return random.expovariate(1/1)
533 class SingleClientFactory(protocol.ReconnectingClientFactory):
534 def __init__(self, node):
537 def buildProtocol(self, addr):
538 p = Protocol(self.node, incoming=False)
542 def proto_made_connection(self, proto):
544 def proto_lost_connection(self, proto, reason):
547 def proto_connected(self, proto):
549 self.node.got_conn(proto)
550 def proto_disconnected(self, proto, reason):
551 self.node.lost_conn(proto, reason)
554 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, known_txs_var=variable.Variable({}), mining_txs_var=variable.Variable({})):
555 self.best_share_hash_func = best_share_hash_func
558 self.addr_store = dict(addr_store)
559 self.connect_addrs = connect_addrs
560 self.preferred_storage = preferred_storage
561 self.known_txs_var = known_txs_var
562 self.mining_txs_var = mining_txs_var
564 self.traffic_happened = variable.Event()
565 self.nonce = random.randrange(2**64)
567 self.bans = {} # address -> end_time
568 self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts)
569 self.serverfactory = ServerFactory(self, max_incoming_conns)
574 raise ValueError('already running')
576 self.clientfactory.start()
577 self.serverfactory.start()
578 self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs]
582 self._stop_thinking = deferral.run_repeatedly(self._think)
586 if len(self.addr_store) < self.preferred_storage and self.peers:
587 random.choice(self.peers.values()).send_getaddrs(count=8)
591 return random.expovariate(1/20)
593 @defer.inlineCallbacks
596 raise ValueError('already stopped')
600 self._stop_thinking()
601 yield self.clientfactory.stop()
602 yield self.serverfactory.stop()
603 for singleclientconnector in self.singleclientconnectors:
604 yield singleclientconnector.factory.stopTrying()
605 yield singleclientconnector.disconnect()
606 del self.singleclientconnectors
608 def got_conn(self, conn):
609 if conn.nonce in self.peers:
610 raise ValueError('already have peer')
611 self.peers[conn.nonce] = conn
613 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)
615 def lost_conn(self, conn, reason):
616 if conn.nonce not in self.peers:
617 raise ValueError('''don't have peer''')
618 if conn is not self.peers[conn.nonce]:
619 raise ValueError('wrong conn')
620 del self.peers[conn.nonce]
622 print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage())
625 def got_addr(self, (host, port), services, timestamp):
626 if (host, port) in self.addr_store:
627 old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
628 self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
630 if len(self.addr_store) < 10000:
631 self.addr_store[host, port] = services, timestamp, timestamp
633 def handle_shares(self, shares, peer):
634 print 'handle_shares', (shares, peer)
636 def handle_share_hashes(self, hashes, peer):
637 print 'handle_share_hashes', (hashes, peer)
639 def handle_get_shares(self, hashes, parents, stops, peer):
640 print 'handle_get_shares', (hashes, parents, stops, peer)
642 def handle_bestblock(self, header, peer):
643 print 'handle_bestblock', header
645 def get_good_peers(self, max_count):
647 return [x[0] for x in sorted(self.addr_store.iteritems(), key=lambda (k, (services, first_seen, last_seen)):
648 -math.log(max(3600, last_seen - first_seen))/math.log(max(3600, t - last_seen))*random.expovariate(1)