p2pool/p2p.py

   1 from __future__ import division
   2
   3 import math
   4 import random
   5 import sys
   6 import time
   7
   8 from twisted.internet import defer, protocol, reactor
   9 from twisted.python import failure, log
  10
  11 import p2pool
  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
  15
  16 class PeerMisbehavingError(Exception):
  17     pass
  18
  19
  20 def fragment(f, **kwargs):
  21     try:
  22         return f(**kwargs)
  23     except p2protocol.TooLong:
  24         fragment(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
  25         return fragment(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
  26
  27 class Protocol(p2protocol.Protocol):
  28     max_remembered_txs_size = 2500000
  29
  30     def __init__(self, node, incoming):
  31         p2protocol.Protocol.__init__(self, node.net.PREFIX, 1000000, node.traffic_happened)
  32         self.node = node
  33         self.incoming = incoming
  34
  35         self.other_version = None
  36         self.connected2 = False
  37
  38     def connectionMade(self):
  39         p2protocol.Protocol.connectionMade(self)
  40
  41         self.factory.proto_made_connection(self)
  42
  43         self.connection_lost_event = variable.Event()
  44
  45         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  46
  47         self.send_version(
  48             version=8,
  49             services=0,
  50             addr_to=dict(
  51                 services=0,
  52                 address=self.transport.getPeer().host,
  53                 port=self.transport.getPeer().port,
  54             ),
  55             addr_from=dict(
  56                 services=0,
  57                 address=self.transport.getHost().host,
  58                 port=self.transport.getHost().port,
  59             ),
  60             nonce=self.node.nonce,
  61             sub_version=p2pool.__version__,
  62             mode=1,
  63             best_share_hash=self.node.best_share_hash_func(),
  64         )
  65
  66         self.timeout_delayed = reactor.callLater(10, self._connect_timeout)
  67
  68         self.get_shares = deferral.GenericDeferrer(
  69             max_id=2**256,
  70             func=lambda id, hashes, parents, stops: self.send_sharereq(id=id, hashes=hashes, parents=parents, stops=stops),
  71             timeout=15,
  72             on_timeout=self.transport.loseConnection,
  73         )
  74
  75         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
  76         self.remote_remembered_txs_size = 0
  77
  78         self.remembered_txs = {} # view of peer's mining_txs
  79         self.remembered_txs_size = 0
  80         self.known_txs_cache = {}
  81
  82     def _connect_timeout(self):
  83         self.timeout_delayed = None
  84         print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  85         self.transport.loseConnection()
  86
  87     def packetReceived(self, command, payload2):
  88         try:
  89             if command != 'version' and not self.connected2:
  90                 raise PeerMisbehavingError('first message was not version message')
  91             p2protocol.Protocol.packetReceived(self, command, payload2)
  92         except PeerMisbehavingError, e:
  93             print 'Peer %s:%i misbehaving, will drop and ban. Reason:' % self.addr, e.message
  94             self.badPeerHappened()
  95
  96     def badPeerHappened(self):
  97         if p2pool.DEBUG:
  98             print "Bad peer banned:", self.addr
  99         self.transport.loseConnection()
 100         self.node.bans[self.transport.getPeer().host] = time.time() + 60*60
 101
 102     def _timeout(self):
 103         self.timeout_delayed = None
 104         print 'Connection timed out, disconnecting from %s:%i' % self.addr
 105         self.transport.loseConnection()
 106
 107     message_version = pack.ComposedType([
 108         ('version', pack.IntType(32)),
 109         ('services', pack.IntType(64)),
 110         ('addr_to', bitcoin_data.address_type),
 111         ('addr_from', bitcoin_data.address_type),
 112         ('nonce', pack.IntType(64)),
 113         ('sub_version', pack.VarStrType()),
 114         ('mode', pack.IntType(32)), # always 1 for legacy compatibility
 115         ('best_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
 116     ])
 117     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
 118         if self.other_version is not None:
 119             raise PeerMisbehavingError('more than one version message')
 120         if version < 4:
 121             raise PeerMisbehavingError('peer too old')
 122
 123         self.other_version = version
 124         self.other_sub_version = sub_version[:512]
 125         self.other_services = services
 126
 127         if nonce == self.node.nonce:
 128             raise PeerMisbehavingError('was connected to self')
 129         if nonce in self.node.peers:
 130             if p2pool.DEBUG:
 131                 print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 132             self.transport.loseConnection()
 133             return
 134
 135         self.nonce = nonce
 136         self.connected2 = True
 137
 138         self.timeout_delayed.cancel()
 139         self.timeout_delayed = reactor.callLater(100, self._timeout)
 140
 141         old_dataReceived = self.dataReceived
 142         def new_dataReceived(data):
 143             if self.timeout_delayed is not None:
 144                 self.timeout_delayed.reset(100)
 145             old_dataReceived(data)
 146         self.dataReceived = new_dataReceived
 147
 148         self.factory.proto_connected(self)
 149
 150         self._stop_thread = deferral.run_repeatedly(lambda: [
 151             self.send_ping(),
 152         random.expovariate(1/100)][-1])
 153
 154         self._stop_thread2 = deferral.run_repeatedly(lambda: [
 155             self.send_addrme(port=self.node.port),
 156         random.expovariate(1/(100*len(self.node.peers) + 1))][-1])
 157
 158         if best_share_hash is not None:
 159             self.node.handle_share_hashes([best_share_hash], self)
 160
 161         if self.other_version < 8:
 162             return
 163
 164         def update_remote_view_of_my_known_txs(before, after):
 165             added = set(after) - set(before)
 166             removed = set(before) - set(after)
 167             if added:
 168                 self.send_have_tx(tx_hashes=list(added))
 169             if removed:
 170                 self.send_losing_tx(tx_hashes=list(removed))
 171
 172                 # cache forgotten txs here for a little while so latency of "losing_tx" packets doesn't cause problems
 173                 key = max(self.known_txs_cache) + 1 if self.known_txs_cache else 0
 174                 self.known_txs_cache[key] = dict((h, before[h]) for h in removed)
 175                 reactor.callLater(20, self.known_txs_cache.pop, key)
 176         watch_id = self.node.known_txs_var.transitioned.watch(update_remote_view_of_my_known_txs)
 177         self.connection_lost_event.watch(lambda: self.node.known_txs_var.transitioned.unwatch(watch_id))
 178
 179         self.send_have_tx(tx_hashes=self.node.known_txs_var.value.keys())
 180
 181         def update_remote_view_of_my_mining_txs(before, after):
 182             added = set(after) - set(before)
 183             removed = set(before) - set(after)
 184             if added:
 185                 self.remote_remembered_txs_size += sum(len(bitcoin_data.tx_type.pack(after[x])) for x in added)
 186                 assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
 187                 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             if removed:
 189                 self.send_forget_tx(tx_hashes=list(removed))
 190                 self.remote_remembered_txs_size -= sum(len(bitcoin_data.tx_type.pack(before[x])) for x in removed)
 191         watch_id2 = self.node.mining_txs_var.transitioned.watch(update_remote_view_of_my_mining_txs)
 192         self.connection_lost_event.watch(lambda: self.node.mining_txs_var.transitioned.unwatch(watch_id2))
 193
 194         self.remote_remembered_txs_size += sum(len(bitcoin_data.tx_type.pack(x)) for x in self.node.mining_txs_var.value.values())
 195         assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
 196         fragment(self.send_remember_tx, tx_hashes=[], txs=self.node.mining_txs_var.value.values())
 197
 198     message_ping = pack.ComposedType([])
 199     def handle_ping(self):
 200         pass
 201
 202     message_addrme = pack.ComposedType([
 203         ('port', pack.IntType(16)),
 204     ])
 205     def handle_addrme(self, port):
 206         host = self.transport.getPeer().host
 207         #print 'addrme from', host, port
 208         if host == '127.0.0.1':
 209             if random.random() < .8 and self.node.peers:
 210                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 211         else:
 212             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 213             if random.random() < .8 and self.node.peers:
 214                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 215                     dict(
 216                         address=dict(
 217                             services=self.other_services,
 218                             address=host,
 219                             port=port,
 220                         ),
 221                         timestamp=int(time.time()),
 222                     ),
 223                 ])
 224
 225     message_addrs = pack.ComposedType([
 226         ('addrs', pack.ListType(pack.ComposedType([
 227             ('timestamp', pack.IntType(64)),
 228             ('address', bitcoin_data.address_type),
 229         ]))),
 230     ])
 231     def handle_addrs(self, addrs):
 232         for addr_record in addrs:
 233             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 234             if random.random() < .8 and self.node.peers:
 235                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 236
 237     message_getaddrs = pack.ComposedType([
 238         ('count', pack.IntType(32)),
 239     ])
 240     def handle_getaddrs(self, count):
 241         if count > 100:
 242             count = 100
 243         self.send_addrs(addrs=[
 244             dict(
 245                 timestamp=int(self.node.addr_store[host, port][2]),
 246                 address=dict(
 247                     services=self.node.addr_store[host, port][0],
 248                     address=host,
 249                     port=port,
 250                 ),
 251             ) for host, port in
 252             self.node.get_good_peers(count)
 253         ])
 254
 255     message_shares = pack.ComposedType([
 256         ('shares', pack.ListType(p2pool_data.share_type)),
 257     ])
 258     def handle_shares(self, shares):
 259         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)
 260
 261     def sendShares(self, shares, tracker, known_txs, include_txs_with=[]):
 262         if not shares:
 263             return defer.succeed(None)
 264
 265         if self.other_version >= 8:
 266             tx_hashes = set()
 267             for share in shares:
 268                 if share.hash in include_txs_with:
 269                     tx_hashes.update(share.get_other_tx_hashes(tracker))
 270
 271             hashes_to_send = [x for x in tx_hashes if x not in self.node.mining_txs_var.value and x in known_txs]
 272
 273             new_remote_remembered_txs_size = self.remote_remembered_txs_size + sum(len(bitcoin_data.tx_type.pack(known_txs[x])) for x in hashes_to_send)
 274             if new_remote_remembered_txs_size > self.max_remembered_txs_size:
 275                 raise ValueError('shares have too many txs')
 276             self.remote_remembered_txs_size = new_remote_remembered_txs_size
 277
 278             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])
 279
 280         res = fragment(self.send_shares, shares=[share.as_share() for share in shares])
 281
 282         if self.other_version >= 8:
 283             res = self.send_forget_tx(tx_hashes=hashes_to_send)
 284
 285             self.remote_remembered_txs_size -= sum(len(bitcoin_data.tx_type.pack(known_txs[x])) for x in hashes_to_send)
 286
 287         return res
 288
 289
 290     message_sharereq = pack.ComposedType([
 291         ('id', pack.IntType(256)),
 292         ('hashes', pack.ListType(pack.IntType(256))),
 293         ('parents', pack.VarIntType()),
 294         ('stops', pack.ListType(pack.IntType(256))),
 295     ])
 296     def handle_sharereq(self, id, hashes, parents, stops):
 297         shares = self.node.handle_get_shares(hashes, parents, stops, self)
 298         try:
 299             self.send_sharereply(id=id, result='good', shares=[share.as_share() for share in shares])
 300         except p2protocol.TooLong:
 301             self.send_sharereply(id=id, result='too long', shares=[])
 302
 303     message_sharereply = pack.ComposedType([
 304         ('id', pack.IntType(256)),
 305         ('result', pack.EnumType(pack.VarIntType(), {0: 'good', 1: 'too long', 2: 'unk2', 3: 'unk3', 4: 'unk4', 5: 'unk5', 6: 'unk6'})),
 306         ('shares', pack.ListType(p2pool_data.share_type)),
 307     ])
 308     def handle_sharereply(self, id, result, shares):
 309         if result == 'good':
 310             res = [p2pool_data.load_share(share, self.node.net, self) for share in shares if share['type'] not in [6, 7]]
 311         else:
 312             res = failure.Failure("sharereply result: " + result)
 313         self.get_shares.got_response(id, res)
 314
 315
 316     message_bestblock = pack.ComposedType([
 317         ('header', bitcoin_data.block_header_type),
 318     ])
 319     def handle_bestblock(self, header):
 320         self.node.handle_bestblock(header, self)
 321
 322
 323     message_have_tx = pack.ComposedType([
 324         ('tx_hashes', pack.ListType(pack.IntType(256))),
 325     ])
 326     def handle_have_tx(self, tx_hashes):
 327         assert self.remote_tx_hashes.isdisjoint(tx_hashes)
 328         self.remote_tx_hashes.update(tx_hashes)
 329     message_losing_tx = pack.ComposedType([
 330         ('tx_hashes', pack.ListType(pack.IntType(256))),
 331     ])
 332     def handle_losing_tx(self, tx_hashes):
 333         assert self.remote_tx_hashes.issuperset(tx_hashes)
 334         self.remote_tx_hashes.difference_update(tx_hashes)
 335
 336
 337     message_remember_tx = pack.ComposedType([
 338         ('tx_hashes', pack.ListType(pack.IntType(256))),
 339         ('txs', pack.ListType(bitcoin_data.tx_type)),
 340     ])
 341     def handle_remember_tx(self, tx_hashes, txs):
 342         for tx_hash in tx_hashes:
 343             if tx_hash in self.remembered_txs:
 344                 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
 345                 self.transport.loseConnection()
 346                 return
 347
 348             if tx_hash in self.node.known_txs_var.value:
 349                 tx = self.node.known_txs_var.value[tx_hash]
 350             else:
 351                 for cache in self.known_txs_cache.itervalues():
 352                     if tx_hash in cache:
 353                         tx = cache[tx_hash]
 354                         print 'Transaction rescued from peer latency cache!'
 355                         break
 356                 else:
 357                     print >>sys.stderr, 'Peer referenced unknown transaction, disconnecting'
 358                     self.transport.loseConnection()
 359                     return
 360
 361             self.remembered_txs[tx_hash] = tx
 362             self.remembered_txs_size += len(bitcoin_data.tx_type.pack(tx))
 363         new_known_txs = dict(self.node.known_txs_var.value)
 364         warned = False
 365         for tx in txs:
 366             tx_hash = bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))
 367             if tx_hash in self.remembered_txs:
 368                 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
 369                 self.transport.loseConnection()
 370                 return
 371
 372             if tx_hash in self.node.known_txs_var.value and not warned:
 373                 print 'Peer sent entire transaction that was already received'
 374                 warned = True
 375
 376             self.remembered_txs[tx_hash] = tx
 377             self.remembered_txs_size += len(bitcoin_data.tx_type.pack(tx))
 378             new_known_txs[tx_hash] = tx
 379         self.node.known_txs_var.set(new_known_txs)
 380         if self.remembered_txs_size >= self.max_remembered_txs_size:
 381             raise PeerMisbehavingError('too much transaction data stored')
 382     message_forget_tx = pack.ComposedType([
 383         ('tx_hashes', pack.ListType(pack.IntType(256))),
 384     ])
 385     def handle_forget_tx(self, tx_hashes):
 386         for tx_hash in tx_hashes:
 387             self.remembered_txs_size -= len(bitcoin_data.tx_type.pack(self.remembered_txs[tx_hash]))
 388             assert self.remembered_txs_size >= 0
 389             del self.remembered_txs[tx_hash]
 390
 391
 392     def connectionLost(self, reason):
 393         self.connection_lost_event.happened()
 394         if self.timeout_delayed is not None:
 395             self.timeout_delayed.cancel()
 396         if self.connected2:
 397             self.factory.proto_disconnected(self, reason)
 398             self._stop_thread()
 399             self._stop_thread2()
 400             self.connected2 = False
 401         self.factory.proto_lost_connection(self, reason)
 402         if p2pool.DEBUG:
 403             print "Peer connection lost:", self.addr, reason
 404         self.get_shares.respond_all(reason)
 405
 406     @defer.inlineCallbacks
 407     def do_ping(self):
 408         start = reactor.seconds()
 409         yield self.get_shares(hashes=[0], parents=0, stops=[])
 410         end = reactor.seconds()
 411         defer.returnValue(end - start)
 412
 413 class ServerFactory(protocol.ServerFactory):
 414     def __init__(self, node, max_conns):
 415         self.node = node
 416         self.max_conns = max_conns
 417
 418         self.conns = {}
 419         self.running = False
 420
 421     def buildProtocol(self, addr):
 422         if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3:
 423             return None
 424         if addr.host in self.node.bans and self.node.bans[addr.host] > time.time():
 425             return None
 426         p = Protocol(self.node, True)
 427         p.factory = self
 428         if p2pool.DEBUG:
 429             print "Got peer connection from:", addr
 430         return p
 431
 432     def _host_to_ident(self, host):
 433         a, b, c, d = host.split('.')
 434         return a, b
 435
 436     def proto_made_connection(self, proto):
 437         ident = self._host_to_ident(proto.transport.getPeer().host)
 438         self.conns[ident] = self.conns.get(ident, 0) + 1
 439     def proto_lost_connection(self, proto, reason):
 440         ident = self._host_to_ident(proto.transport.getPeer().host)
 441         self.conns[ident] -= 1
 442         if not self.conns[ident]:
 443             del self.conns[ident]
 444
 445     def proto_connected(self, proto):
 446         self.node.got_conn(proto)
 447     def proto_disconnected(self, proto, reason):
 448         self.node.lost_conn(proto, reason)
 449
 450     def start(self):
 451         assert not self.running
 452         self.running = True
 453
 454         def attempt_listen():
 455             if self.running:
 456                 self.listen_port = reactor.listenTCP(self.node.port, self)
 457         deferral.retry('Error binding to P2P port:', traceback=False)(attempt_listen)()
 458
 459     def stop(self):
 460         assert self.running
 461         self.running = False
 462
 463         return self.listen_port.stopListening()
 464
 465 class ClientFactory(protocol.ClientFactory):
 466     def __init__(self, node, desired_conns, max_attempts):
 467         self.node = node
 468         self.desired_conns = desired_conns
 469         self.max_attempts = max_attempts
 470
 471         self.attempts = set()
 472         self.conns = set()
 473         self.running = False
 474
 475     def _host_to_ident(self, host):
 476         a, b, c, d = host.split('.')
 477         return a, b
 478
 479     def buildProtocol(self, addr):
 480         p = Protocol(self.node, False)
 481         p.factory = self
 482         return p
 483
 484     def startedConnecting(self, connector):
 485         ident = self._host_to_ident(connector.getDestination().host)
 486         if ident in self.attempts:
 487             raise AssertionError('already have attempt')
 488         self.attempts.add(ident)
 489
 490     def clientConnectionFailed(self, connector, reason):
 491         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 492
 493     def clientConnectionLost(self, connector, reason):
 494         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 495
 496     def proto_made_connection(self, proto):
 497         pass
 498     def proto_lost_connection(self, proto, reason):
 499         pass
 500
 501     def proto_connected(self, proto):
 502         self.conns.add(proto)
 503         self.node.got_conn(proto)
 504     def proto_disconnected(self, proto, reason):
 505         self.conns.remove(proto)
 506         self.node.lost_conn(proto, reason)
 507
 508     def start(self):
 509         assert not self.running
 510         self.running = True
 511         self._stop_thinking = deferral.run_repeatedly(self._think)
 512     def stop(self):
 513         assert self.running
 514         self.running = False
 515         self._stop_thinking()
 516
 517     def _think(self):
 518         try:
 519             if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store:
 520                 (host, port), = self.node.get_good_peers(1)
 521
 522                 if self._host_to_ident(host) in self.attempts:
 523                     pass
 524                 elif host in self.node.bans and self.node.bans[host] > time.time():
 525                     pass
 526                 else:
 527                     #print 'Trying to connect to', host, port
 528                     reactor.connectTCP(host, port, self, timeout=5)
 529         except:
 530             log.err()
 531
 532         return random.expovariate(1/1)
 533
 534 class SingleClientFactory(protocol.ReconnectingClientFactory):
 535     def __init__(self, node):
 536         self.node = node
 537
 538     def buildProtocol(self, addr):
 539         p = Protocol(self.node, incoming=False)
 540         p.factory = self
 541         return p
 542
 543     def proto_made_connection(self, proto):
 544         pass
 545     def proto_lost_connection(self, proto, reason):
 546         pass
 547
 548     def proto_connected(self, proto):
 549         self.resetDelay()
 550         self.node.got_conn(proto)
 551     def proto_disconnected(self, proto, reason):
 552         self.node.lost_conn(proto, reason)
 553
 554 class Node(object):
 555     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(), known_txs_var=variable.Variable({}), mining_txs_var=variable.Variable({})):
 556         self.best_share_hash_func = best_share_hash_func
 557         self.port = port
 558         self.net = net
 559         self.addr_store = dict(addr_store)
 560         self.connect_addrs = connect_addrs
 561         self.preferred_storage = preferred_storage
 562         self.traffic_happened = traffic_happened
 563         self.known_txs_var = known_txs_var
 564         self.mining_txs_var = mining_txs_var
 565
 566         self.nonce = random.randrange(2**64)
 567         self.peers = {}
 568         self.bans = {} # address -> end_time
 569         self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts)
 570         self.serverfactory = ServerFactory(self, max_incoming_conns)
 571         self.running = False
 572
 573     def start(self):
 574         if self.running:
 575             raise ValueError('already running')
 576
 577         self.clientfactory.start()
 578         self.serverfactory.start()
 579         self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs]
 580
 581         self.running = True
 582
 583         self._stop_thinking = deferral.run_repeatedly(self._think)
 584
 585     def _think(self):
 586         try:
 587             if len(self.addr_store) < self.preferred_storage and self.peers:
 588                 random.choice(self.peers.values()).send_getaddrs(count=8)
 589         except:
 590             log.err()
 591
 592         return random.expovariate(1/20)
 593
 594     @defer.inlineCallbacks
 595     def stop(self):
 596         if not self.running:
 597             raise ValueError('already stopped')
 598
 599         self.running = False
 600
 601         self._stop_thinking()
 602         yield self.clientfactory.stop()
 603         yield self.serverfactory.stop()
 604         for singleclientconnector in self.singleclientconnectors:
 605             yield singleclientconnector.factory.stopTrying()
 606             yield singleclientconnector.disconnect()
 607         del self.singleclientconnectors
 608
 609     def got_conn(self, conn):
 610         if conn.nonce in self.peers:
 611             raise ValueError('already have peer')
 612         self.peers[conn.nonce] = conn
 613
 614         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
 616     def lost_conn(self, conn, reason):
 617         if conn.nonce not in self.peers:
 618             raise ValueError('''don't have peer''')
 619         if conn is not self.peers[conn.nonce]:
 620             raise ValueError('wrong conn')
 621         del self.peers[conn.nonce]
 622
 623         print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage())
 624
 625
 626     def got_addr(self, (host, port), services, timestamp):
 627         if (host, port) in self.addr_store:
 628             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 629             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 630         else:
 631             self.addr_store[host, port] = services, timestamp, timestamp
 632
 633     def handle_shares(self, shares, peer):
 634         print 'handle_shares', (shares, peer)
 635
 636     def handle_share_hashes(self, hashes, peer):
 637         print 'handle_share_hashes', (hashes, peer)
 638
 639     def handle_get_shares(self, hashes, parents, stops, peer):
 640         print 'handle_get_shares', (hashes, parents, stops, peer)
 641
 642     def handle_bestblock(self, header, peer):
 643         print 'handle_bestblock', header
 644
 645     def get_good_peers(self, max_count):
 646         t = time.time()
 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)
 649         )][:max_count]