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         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()))
  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         self.factory.proto_made_connection(self)
  40
  41         self.connection_lost_event = variable.Event()
  42
  43         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  44
  45         self.send_version(
  46             version=1300,
  47             services=0,
  48             addr_to=dict(
  49                 services=0,
  50                 address=self.transport.getPeer().host,
  51                 port=self.transport.getPeer().port,
  52             ),
  53             addr_from=dict(
  54                 services=0,
  55                 address=self.transport.getHost().host,
  56                 port=self.transport.getHost().port,
  57             ),
  58             nonce=self.node.nonce,
  59             sub_version=p2pool.__version__,
  60             mode=1,
  61             best_share_hash=self.node.best_share_hash_func(),
  62         )
  63
  64         self.timeout_delayed = reactor.callLater(10, self._connect_timeout)
  65
  66         self.get_shares = deferral.GenericDeferrer(
  67             max_id=2**256,
  68             func=lambda id, hashes, parents, stops: self.send_sharereq(id=id, hashes=hashes, parents=parents, stops=stops),
  69             timeout=15,
  70             on_timeout=self.disconnect,
  71         )
  72
  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
  75
  76         self.remembered_txs = {} # view of peer's mining_txs
  77         self.remembered_txs_size = 0
  78         self.known_txs_cache = {}
  79
  80     def _connect_timeout(self):
  81         self.timeout_delayed = None
  82         print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  83         self.disconnect()
  84
  85     def packetReceived(self, command, payload2):
  86         try:
  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()
  93
  94     def badPeerHappened(self):
  95         if p2pool.DEBUG:
  96             print "Bad peer banned:", self.addr
  97         self.disconnect()
  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
 100
 101     def _timeout(self):
 102         self.timeout_delayed = None
 103         print 'Connection timed out, disconnecting from %s:%i' % self.addr
 104         self.disconnect()
 105
 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))),
 115     ])
 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')
 119         if version < 1300:
 120             raise PeerMisbehavingError('peer too old')
 121
 122         self.other_version = version
 123         self.other_sub_version = sub_version[:512]
 124         self.other_services = services
 125
 126         if nonce == self.node.nonce:
 127             raise PeerMisbehavingError('was connected to self')
 128         if nonce in self.node.peers:
 129             if p2pool.DEBUG:
 130                 print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 131             self.disconnect()
 132             return
 133
 134         self.nonce = nonce
 135         self.connected2 = True
 136
 137         self.timeout_delayed.cancel()
 138         self.timeout_delayed = reactor.callLater(100, self._timeout)
 139
 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
 146
 147         self.factory.proto_connected(self)
 148
 149         self._stop_thread = deferral.run_repeatedly(lambda: [
 150             self.send_ping(),
 151         random.expovariate(1/100)][-1])
 152
 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])
 156
 157         if best_share_hash is not None:
 158             self.node.handle_share_hashes([best_share_hash], self)
 159
 160         def update_remote_view_of_my_known_txs(before, after):
 161             added = set(after) - set(before)
 162             removed = set(before) - set(after)
 163             if added:
 164                 self.send_have_tx(tx_hashes=list(added))
 165             if removed:
 166                 self.send_losing_tx(tx_hashes=list(removed))
 167
 168                 # cache forgotten txs here for a little while so latency of "losing_tx" packets doesn't cause problems
 169                 key = max(self.known_txs_cache) + 1 if self.known_txs_cache else 0
 170                 self.known_txs_cache[key] = dict((h, before[h]) for h in removed)
 171                 reactor.callLater(20, self.known_txs_cache.pop, key)
 172         watch_id = self.node.known_txs_var.transitioned.watch(update_remote_view_of_my_known_txs)
 173         self.connection_lost_event.watch(lambda: self.node.known_txs_var.transitioned.unwatch(watch_id))
 174
 175         self.send_have_tx(tx_hashes=self.node.known_txs_var.value.keys())
 176
 177         def update_remote_view_of_my_mining_txs(before, after):
 178             added = set(after) - set(before)
 179             removed = set(before) - set(after)
 180             if added:
 181                 self.remote_remembered_txs_size += sum(100 + bitcoin_data.tx_type.packed_size(after[x]) for x in added)
 182                 assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
 183                 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])
 184             if removed:
 185                 self.send_forget_tx(tx_hashes=list(removed))
 186                 self.remote_remembered_txs_size -= sum(100 + bitcoin_data.tx_type.packed_size(before[x]) for x in removed)
 187         watch_id2 = self.node.mining_txs_var.transitioned.watch(update_remote_view_of_my_mining_txs)
 188         self.connection_lost_event.watch(lambda: self.node.mining_txs_var.transitioned.unwatch(watch_id2))
 189
 190         self.remote_remembered_txs_size += sum(100 + bitcoin_data.tx_type.packed_size(x) for x in self.node.mining_txs_var.value.values())
 191         assert self.remote_remembered_txs_size <= self.max_remembered_txs_size
 192         fragment(self.send_remember_tx, tx_hashes=[], txs=self.node.mining_txs_var.value.values())
 193
 194     message_ping = pack.ComposedType([])
 195     def handle_ping(self):
 196         pass
 197
 198     message_addrme = pack.ComposedType([
 199         ('port', pack.IntType(16)),
 200     ])
 201     def handle_addrme(self, port):
 202         host = self.transport.getPeer().host
 203         #print 'addrme from', host, port
 204         if host == '127.0.0.1':
 205             if random.random() < .8 and self.node.peers:
 206                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 207         else:
 208             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 209             if random.random() < .8 and self.node.peers:
 210                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 211                     dict(
 212                         address=dict(
 213                             services=self.other_services,
 214                             address=host,
 215                             port=port,
 216                         ),
 217                         timestamp=int(time.time()),
 218                     ),
 219                 ])
 220
 221     message_addrs = pack.ComposedType([
 222         ('addrs', pack.ListType(pack.ComposedType([
 223             ('timestamp', pack.IntType(64)),
 224             ('address', bitcoin_data.address_type),
 225         ]))),
 226     ])
 227     def handle_addrs(self, addrs):
 228         for addr_record in addrs:
 229             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 230             if random.random() < .8 and self.node.peers:
 231                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 232
 233     message_getaddrs = pack.ComposedType([
 234         ('count', pack.IntType(32)),
 235     ])
 236     def handle_getaddrs(self, count):
 237         if count > 100:
 238             count = 100
 239         self.send_addrs(addrs=[
 240             dict(
 241                 timestamp=int(self.node.addr_store[host, port][2]),
 242                 address=dict(
 243                     services=self.node.addr_store[host, port][0],
 244                     address=host,
 245                     port=port,
 246                 ),
 247             ) for host, port in
 248             self.node.get_good_peers(count)
 249         ])
 250
 251     message_shares = pack.ComposedType([
 252         ('shares', pack.ListType(p2pool_data.share_type)),
 253     ])
 254     def handle_shares(self, shares):
 255         result = []
 256         for wrappedshare in shares:
 257             if wrappedshare['type'] < 9: continue
 258             share = p2pool_data.load_share(wrappedshare, self.node.net, self.addr)
 259             if wrappedshare['type'] >= 13:
 260                 txs = []
 261                 for tx_hash in share.share_info['new_transaction_hashes']:
 262                     if tx_hash in self.node.known_txs_var.value:
 263                         tx = self.node.known_txs_var.value[tx_hash]
 264                     else:
 265                         for cache in self.known_txs_cache.itervalues():
 266                             if tx_hash in cache:
 267                                 tx = cache[tx_hash]
 268                                 print 'Transaction %064x rescued from peer latency cache!' % (tx_hash,)
 269                                 break
 270                         else:
 271                             print >>sys.stderr, 'Peer referenced unknown transaction %064x, disconnecting' % (tx_hash,)
 272                             self.disconnect()
 273                             return
 274                     txs.append(tx)
 275             else:
 276                 txs = None
 277
 278             result.append((share, txs))
 279
 280         self.node.handle_shares(result, self)
 281
 282     def sendShares(self, shares, tracker, known_txs, include_txs_with=[]):
 283         tx_hashes = set()
 284         for share in shares:
 285             if share.VERSION >= 13:
 286                 # send full transaction for every new_transaction_hash that peer does not know
 287                 for tx_hash in share.share_info['new_transaction_hashes']:
 288                     assert tx_hash in known_txs, 'tried to broadcast share without knowing all its new transactions'
 289                     if tx_hash not in self.remote_tx_hashes:
 290                         tx_hashes.add(tx_hash)
 291                 continue
 292             if share.hash in include_txs_with:
 293                 x = share.get_other_tx_hashes(tracker)
 294                 if x is not None:
 295                     tx_hashes.update(x)
 296
 297         hashes_to_send = [x for x in tx_hashes if x not in self.node.mining_txs_var.value and x in known_txs]
 298
 299         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)
 300         if new_remote_remembered_txs_size > self.max_remembered_txs_size:
 301             raise ValueError('shares have too many txs')
 302         self.remote_remembered_txs_size = new_remote_remembered_txs_size
 303
 304         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])
 305
 306         fragment(self.send_shares, shares=[share.as_share() for share in shares])
 307
 308         self.send_forget_tx(tx_hashes=hashes_to_send)
 309
 310         self.remote_remembered_txs_size -= sum(100 + bitcoin_data.tx_type.packed_size(known_txs[x]) for x in hashes_to_send)
 311
 312
 313     message_sharereq = pack.ComposedType([
 314         ('id', pack.IntType(256)),
 315         ('hashes', pack.ListType(pack.IntType(256))),
 316         ('parents', pack.VarIntType()),
 317         ('stops', pack.ListType(pack.IntType(256))),
 318     ])
 319     def handle_sharereq(self, id, hashes, parents, stops):
 320         shares = self.node.handle_get_shares(hashes, parents, stops, self)
 321         try:
 322             self.send_sharereply(id=id, result='good', shares=[share.as_share() for share in shares])
 323         except p2protocol.TooLong:
 324             self.send_sharereply(id=id, result='too long', shares=[])
 325
 326     message_sharereply = pack.ComposedType([
 327         ('id', pack.IntType(256)),
 328         ('result', pack.EnumType(pack.VarIntType(), {0: 'good', 1: 'too long', 2: 'unk2', 3: 'unk3', 4: 'unk4', 5: 'unk5', 6: 'unk6'})),
 329         ('shares', pack.ListType(p2pool_data.share_type)),
 330     ])
 331     def handle_sharereply(self, id, result, shares):
 332         if result == 'good':
 333             res = [p2pool_data.load_share(share, self.node.net, self.addr) for share in shares if share['type'] >= 9]
 334         else:
 335             res = failure.Failure("sharereply result: " + result)
 336         self.get_shares.got_response(id, res)
 337
 338
 339     message_bestblock = pack.ComposedType([
 340         ('header', bitcoin_data.block_header_type),
 341     ])
 342     def handle_bestblock(self, header):
 343         self.node.handle_bestblock(header, self)
 344
 345
 346     message_have_tx = pack.ComposedType([
 347         ('tx_hashes', pack.ListType(pack.IntType(256))),
 348     ])
 349     def handle_have_tx(self, tx_hashes):
 350         #assert self.remote_tx_hashes.isdisjoint(tx_hashes)
 351         self.remote_tx_hashes.update(tx_hashes)
 352         while len(self.remote_tx_hashes) > 10000:
 353             self.remote_tx_hashes.pop()
 354     message_losing_tx = pack.ComposedType([
 355         ('tx_hashes', pack.ListType(pack.IntType(256))),
 356     ])
 357     def handle_losing_tx(self, tx_hashes):
 358         #assert self.remote_tx_hashes.issuperset(tx_hashes)
 359         self.remote_tx_hashes.difference_update(tx_hashes)
 360
 361
 362     message_remember_tx = pack.ComposedType([
 363         ('tx_hashes', pack.ListType(pack.IntType(256))),
 364         ('txs', pack.ListType(bitcoin_data.tx_type)),
 365     ])
 366     def handle_remember_tx(self, tx_hashes, txs):
 367         for tx_hash in tx_hashes:
 368             if tx_hash in self.remembered_txs:
 369                 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
 370                 self.disconnect()
 371                 return
 372
 373             if tx_hash in self.node.known_txs_var.value:
 374                 tx = self.node.known_txs_var.value[tx_hash]
 375             else:
 376                 for cache in self.known_txs_cache.itervalues():
 377                     if tx_hash in cache:
 378                         tx = cache[tx_hash]
 379                         print 'Transaction %064x rescued from peer latency cache!' % (tx_hash,)
 380                         break
 381                 else:
 382                     print >>sys.stderr, 'Peer referenced unknown transaction %064x, disconnecting' % (tx_hash,)
 383                     self.disconnect()
 384                     return
 385
 386             self.remembered_txs[tx_hash] = tx
 387             self.remembered_txs_size += 100 + bitcoin_data.tx_type.packed_size(tx)
 388         new_known_txs = dict(self.node.known_txs_var.value)
 389         warned = False
 390         for tx in txs:
 391             tx_hash = bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))
 392             if tx_hash in self.remembered_txs:
 393                 print >>sys.stderr, 'Peer referenced transaction twice, disconnecting'
 394                 self.disconnect()
 395                 return
 396
 397             if tx_hash in self.node.known_txs_var.value and not warned:
 398                 print 'Peer sent entire transaction %064x that was already received' % (tx_hash,)
 399                 warned = True
 400
 401             self.remembered_txs[tx_hash] = tx
 402             self.remembered_txs_size += 100 + bitcoin_data.tx_type.packed_size(tx)
 403             new_known_txs[tx_hash] = tx
 404         self.node.known_txs_var.set(new_known_txs)
 405         if self.remembered_txs_size >= self.max_remembered_txs_size:
 406             raise PeerMisbehavingError('too much transaction data stored')
 407     message_forget_tx = pack.ComposedType([
 408         ('tx_hashes', pack.ListType(pack.IntType(256))),
 409     ])
 410     def handle_forget_tx(self, tx_hashes):
 411         for tx_hash in tx_hashes:
 412             self.remembered_txs_size -= 100 + bitcoin_data.tx_type.packed_size(self.remembered_txs[tx_hash])
 413             assert self.remembered_txs_size >= 0
 414             del self.remembered_txs[tx_hash]
 415
 416
 417     def connectionLost(self, reason):
 418         self.connection_lost_event.happened()
 419         if self.timeout_delayed is not None:
 420             self.timeout_delayed.cancel()
 421         if self.connected2:
 422             self.factory.proto_disconnected(self, reason)
 423             self._stop_thread()
 424             self._stop_thread2()
 425             self.connected2 = False
 426         self.factory.proto_lost_connection(self, reason)
 427         if p2pool.DEBUG:
 428             print "Peer connection lost:", self.addr, reason
 429         self.get_shares.respond_all(reason)
 430
 431     @defer.inlineCallbacks
 432     def do_ping(self):
 433         start = reactor.seconds()
 434         yield self.get_shares(hashes=[0], parents=0, stops=[])
 435         end = reactor.seconds()
 436         defer.returnValue(end - start)
 437
 438 class ServerFactory(protocol.ServerFactory):
 439     def __init__(self, node, max_conns):
 440         self.node = node
 441         self.max_conns = max_conns
 442
 443         self.conns = {}
 444         self.running = False
 445         self.listen_port = None
 446
 447     def buildProtocol(self, addr):
 448         if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3:
 449             return None
 450         if addr.host in self.node.bans and self.node.bans[addr.host] > time.time():
 451             return None
 452         p = Protocol(self.node, True)
 453         p.factory = self
 454         if p2pool.DEBUG:
 455             print "Got peer connection from:", addr
 456         return p
 457
 458     def _host_to_ident(self, host):
 459         a, b, c, d = host.split('.')
 460         return a, b
 461
 462     def proto_made_connection(self, proto):
 463         ident = self._host_to_ident(proto.transport.getPeer().host)
 464         self.conns[ident] = self.conns.get(ident, 0) + 1
 465     def proto_lost_connection(self, proto, reason):
 466         ident = self._host_to_ident(proto.transport.getPeer().host)
 467         self.conns[ident] -= 1
 468         if not self.conns[ident]:
 469             del self.conns[ident]
 470
 471     def proto_connected(self, proto):
 472         self.node.got_conn(proto)
 473     def proto_disconnected(self, proto, reason):
 474         self.node.lost_conn(proto, reason)
 475
 476     def start(self):
 477         assert not self.running
 478         self.running = True
 479
 480         def attempt_listen():
 481             if self.running:
 482                 self.listen_port = reactor.listenTCP(self.node.port, self)
 483         deferral.retry('Error binding to P2P port:', traceback=False)(attempt_listen)()
 484
 485     def stop(self):
 486         assert self.running
 487         self.running = False
 488
 489         return self.listen_port.stopListening()
 490
 491 class ClientFactory(protocol.ClientFactory):
 492     def __init__(self, node, desired_conns, max_attempts):
 493         self.node = node
 494         self.desired_conns = desired_conns
 495         self.max_attempts = max_attempts
 496
 497         self.attempts = set()
 498         self.conns = set()
 499         self.running = False
 500
 501     def _host_to_ident(self, host):
 502         a, b, c, d = host.split('.')
 503         return a, b
 504
 505     def buildProtocol(self, addr):
 506         p = Protocol(self.node, False)
 507         p.factory = self
 508         return p
 509
 510     def startedConnecting(self, connector):
 511         ident = self._host_to_ident(connector.getDestination().host)
 512         if ident in self.attempts:
 513             raise AssertionError('already have attempt')
 514         self.attempts.add(ident)
 515
 516     def clientConnectionFailed(self, connector, reason):
 517         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 518
 519     def clientConnectionLost(self, connector, reason):
 520         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 521
 522     def proto_made_connection(self, proto):
 523         pass
 524     def proto_lost_connection(self, proto, reason):
 525         pass
 526
 527     def proto_connected(self, proto):
 528         self.conns.add(proto)
 529         self.node.got_conn(proto)
 530     def proto_disconnected(self, proto, reason):
 531         self.conns.remove(proto)
 532         self.node.lost_conn(proto, reason)
 533
 534     def start(self):
 535         assert not self.running
 536         self.running = True
 537         self._stop_thinking = deferral.run_repeatedly(self._think)
 538     def stop(self):
 539         assert self.running
 540         self.running = False
 541         self._stop_thinking()
 542
 543     def _think(self):
 544         try:
 545             if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store:
 546                 (host, port), = self.node.get_good_peers(1)
 547
 548                 if self._host_to_ident(host) in self.attempts:
 549                     pass
 550                 elif host in self.node.bans and self.node.bans[host] > time.time():
 551                     pass
 552                 else:
 553                     #print 'Trying to connect to', host, port
 554                     reactor.connectTCP(host, port, self, timeout=5)
 555         except:
 556             log.err()
 557
 558         return random.expovariate(1/1)
 559
 560 class SingleClientFactory(protocol.ReconnectingClientFactory):
 561     def __init__(self, node):
 562         self.node = node
 563
 564     def buildProtocol(self, addr):
 565         p = Protocol(self.node, incoming=False)
 566         p.factory = self
 567         return p
 568
 569     def proto_made_connection(self, proto):
 570         pass
 571     def proto_lost_connection(self, proto, reason):
 572         pass
 573
 574     def proto_connected(self, proto):
 575         self.resetDelay()
 576         self.node.got_conn(proto)
 577     def proto_disconnected(self, proto, reason):
 578         self.node.lost_conn(proto, reason)
 579
 580 class Node(object):
 581     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({})):
 582         self.best_share_hash_func = best_share_hash_func
 583         self.port = port
 584         self.net = net
 585         self.addr_store = dict(addr_store)
 586         self.connect_addrs = connect_addrs
 587         self.preferred_storage = preferred_storage
 588         self.known_txs_var = known_txs_var
 589         self.mining_txs_var = mining_txs_var
 590
 591         self.traffic_happened = variable.Event()
 592         self.nonce = random.randrange(2**64)
 593         self.peers = {}
 594         self.bans = {} # address -> end_time
 595         self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts)
 596         self.serverfactory = ServerFactory(self, max_incoming_conns)
 597         self.running = False
 598
 599     def start(self):
 600         if self.running:
 601             raise ValueError('already running')
 602
 603         self.clientfactory.start()
 604         self.serverfactory.start()
 605         self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs]
 606
 607         self.running = True
 608
 609         self._stop_thinking = deferral.run_repeatedly(self._think)
 610
 611     def _think(self):
 612         try:
 613             if len(self.addr_store) < self.preferred_storage and self.peers:
 614                 random.choice(self.peers.values()).send_getaddrs(count=8)
 615         except:
 616             log.err()
 617
 618         return random.expovariate(1/20)
 619
 620     @defer.inlineCallbacks
 621     def stop(self):
 622         if not self.running:
 623             raise ValueError('already stopped')
 624
 625         self.running = False
 626
 627         self._stop_thinking()
 628         yield self.clientfactory.stop()
 629         yield self.serverfactory.stop()
 630         for singleclientconnector in self.singleclientconnectors:
 631             yield singleclientconnector.factory.stopTrying()
 632             yield singleclientconnector.disconnect()
 633         del self.singleclientconnectors
 634
 635     def got_conn(self, conn):
 636         if conn.nonce in self.peers:
 637             raise ValueError('already have peer')
 638         self.peers[conn.nonce] = conn
 639
 640         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)
 641
 642     def lost_conn(self, conn, reason):
 643         if conn.nonce not in self.peers:
 644             raise ValueError('''don't have peer''')
 645         if conn is not self.peers[conn.nonce]:
 646             raise ValueError('wrong conn')
 647         del self.peers[conn.nonce]
 648
 649         print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage())
 650
 651
 652     def got_addr(self, (host, port), services, timestamp):
 653         if (host, port) in self.addr_store:
 654             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 655             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 656         else:
 657             if len(self.addr_store) < 10000:
 658                 self.addr_store[host, port] = services, timestamp, timestamp
 659
 660     def handle_shares(self, shares, peer):
 661         print 'handle_shares', (shares, peer)
 662
 663     def handle_share_hashes(self, hashes, peer):
 664         print 'handle_share_hashes', (hashes, peer)
 665
 666     def handle_get_shares(self, hashes, parents, stops, peer):
 667         print 'handle_get_shares', (hashes, parents, stops, peer)
 668
 669     def handle_bestblock(self, header, peer):
 670         print 'handle_bestblock', header
 671
 672     def get_good_peers(self, max_count):
 673         t = time.time()
 674         return [x[0] for x in sorted(self.addr_store.iteritems(), key=lambda (k, (services, first_seen, last_seen)):
 675             -math.log(max(3600, last_seen - first_seen))/math.log(max(3600, t - last_seen))*random.expovariate(1)
 676         )][:max_count]