p2pool/p2p.py

   1 from __future__ import division
   2
   3 import random
   4 import sys
   5 import time
   6
   7 from twisted.internet import defer, error, protocol, reactor
   8 from twisted.python import log
   9
  10 import p2pool
  11 from p2pool import data as p2pool_data
  12 from p2pool.bitcoin import p2p as bitcoin_p2p
  13 from p2pool.bitcoin import data as bitcoin_data
  14 from p2pool.util import deferral, pack
  15
  16 class Protocol(bitcoin_p2p.BaseProtocol):
  17     version = 2
  18     sub_version = p2pool.__version__
  19
  20     def __init__(self, node, incoming):
  21         bitcoin_p2p.BaseProtocol.__init__(self, node.net.PREFIX, 1000000)
  22         self.node = node
  23         self.incoming = incoming
  24
  25     other_version = None
  26     connected2 = False
  27
  28     def connectionMade(self):
  29         self.factory.proto_made_connection(self)
  30
  31         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  32
  33         self.send_version(
  34             version=self.version,
  35             services=0,
  36             addr_to=dict(
  37                 services=0,
  38                 address=self.transport.getPeer().host,
  39                 port=self.transport.getPeer().port,
  40             ),
  41             addr_from=dict(
  42                 services=0,
  43                 address=self.transport.getHost().host,
  44                 port=self.transport.getHost().port,
  45             ),
  46             nonce=self.node.nonce,
  47             sub_version=self.sub_version,
  48             mode=1,
  49             best_share_hash=self.node.best_share_hash_func(),
  50         )
  51
  52         reactor.callLater(10, self._connect_timeout)
  53         self.timeout_delayed = reactor.callLater(100, self._timeout)
  54
  55         old_dataReceived = self.dataReceived
  56         def new_dataReceived(data):
  57             if not self.timeout_delayed.called:
  58                 self.timeout_delayed.reset(100)
  59             old_dataReceived(data)
  60         self.dataReceived = new_dataReceived
  61
  62     def _connect_timeout(self):
  63         if not self.connected2 and self.transport.connected:
  64             print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  65             self.transport.loseConnection()
  66
  67     def packetReceived(self, command, payload2):
  68         if command != 'version' and not self.connected2:
  69             self.transport.loseConnection()
  70             return
  71
  72         bitcoin_p2p.BaseProtocol.packetReceived(self, command, payload2)
  73
  74     def _timeout(self):
  75         if self.transport.connected:
  76             print 'Connection timed out, disconnecting from %s:%i' % self.addr
  77             self.transport.loseConnection()
  78
  79     @defer.inlineCallbacks
  80     def _think(self):
  81         while self.connected2:
  82             self.send_ping()
  83             yield deferral.sleep(random.expovariate(1/100))
  84
  85     @defer.inlineCallbacks
  86     def _think2(self):
  87         while self.connected2:
  88             self.send_addrme(port=self.node.port)
  89             #print 'sending addrme'
  90             yield deferral.sleep(random.expovariate(1/(100*len(self.node.peers) + 1)))
  91
  92     message_version = pack.ComposedType([
  93         ('version', pack.IntType(32)),
  94         ('services', pack.IntType(64)),
  95         ('addr_to', bitcoin_data.address_type),
  96         ('addr_from', bitcoin_data.address_type),
  97         ('nonce', pack.IntType(64)),
  98         ('sub_version', pack.VarStrType()),
  99         ('mode', pack.IntType(32)), # always 1 for legacy compatibility
 100         ('best_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
 101     ])
 102     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
 103         if self.other_version is not None or version < 2:
 104             self.transport.loseConnection()
 105             return
 106
 107         self.other_version = version
 108         self.other_sub_version = sub_version[:512]
 109         self.other_services = services
 110
 111         if nonce == self.node.nonce:
 112             #print 'Detected connection to self, disconnecting from %s:%i' % self.addr
 113             self.transport.loseConnection()
 114             return
 115         if nonce in self.node.peers:
 116             #print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 117             self.transport.loseConnection()
 118             return
 119
 120         self.nonce = nonce
 121         self.connected2 = True
 122         self.factory.proto_connected(self)
 123
 124         self._think()
 125         self._think2()
 126
 127         if best_share_hash is not None:
 128             self.node.handle_share_hashes([best_share_hash], self)
 129
 130     message_ping = pack.ComposedType([])
 131     def handle_ping(self):
 132         pass
 133
 134     message_addrme = pack.ComposedType([
 135         ('port', pack.IntType(16)),
 136     ])
 137     def handle_addrme(self, port):
 138         host = self.transport.getPeer().host
 139         #print 'addrme from', host, port
 140         if host == '127.0.0.1':
 141             if random.random() < .8 and self.node.peers:
 142                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 143         else:
 144             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 145             if random.random() < .8 and self.node.peers:
 146                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 147                     dict(
 148                         address=dict(
 149                             services=self.other_services,
 150                             address=host,
 151                             port=port,
 152                         ),
 153                         timestamp=int(time.time()),
 154                     ),
 155                 ])
 156
 157     message_addrs = pack.ComposedType([
 158         ('addrs', pack.ListType(pack.ComposedType([
 159             ('timestamp', pack.IntType(64)),
 160             ('address', bitcoin_data.address_type),
 161         ]))),
 162     ])
 163     def handle_addrs(self, addrs):
 164         for addr_record in addrs:
 165             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 166             if random.random() < .8 and self.node.peers:
 167                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 168
 169     message_getaddrs = pack.ComposedType([
 170         ('count', pack.IntType(32)),
 171     ])
 172     def handle_getaddrs(self, count):
 173         if count > 100:
 174             count = 100
 175         self.send_addrs(addrs=[
 176             dict(
 177                 timestamp=self.node.addr_store[host, port][2],
 178                 address=dict(
 179                     services=self.node.addr_store[host, port][0],
 180                     address=host,
 181                     port=port,
 182                 ),
 183             ) for host, port in
 184             self.node.get_good_peers(count)
 185         ])
 186
 187     message_getshares = pack.ComposedType([
 188         ('hashes', pack.ListType(pack.IntType(256))),
 189         ('parents', pack.VarIntType()),
 190         ('stops', pack.ListType(pack.IntType(256))),
 191     ])
 192     def handle_getshares(self, hashes, parents, stops):
 193         self.node.handle_get_shares(hashes, parents, stops, self)
 194
 195     message_shares = pack.ComposedType([
 196         ('shares', pack.ListType(p2pool_data.share_type)),
 197     ])
 198     def handle_shares(self, shares):
 199         res = []
 200         for share in shares:
 201             share_obj = p2pool_data.Share.from_share(share, self.node.net)
 202             share_obj.peer = self
 203             res.append(share_obj)
 204         self.node.handle_shares(res, self)
 205
 206     def sendShares(self, shares, full=False):
 207         def att(f, **kwargs):
 208             try:
 209                 f(**kwargs)
 210             except bitcoin_p2p.TooLong:
 211                 att(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
 212                 att(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
 213         if shares:
 214             att(self.send_shares, shares=[share.as_share() for share in shares])
 215
 216     def connectionLost(self, reason):
 217         if self.connected2:
 218             self.factory.proto_disconnected(self, reason)
 219             self.connected2 = False
 220         self.factory.proto_lost_connection(self, reason)
 221
 222 class ServerFactory(protocol.ServerFactory):
 223     def __init__(self, node, max_conns):
 224         self.node = node
 225         self.max_conns = max_conns
 226
 227         self.conns = {}
 228         self.running = False
 229
 230     def buildProtocol(self, addr):
 231         if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3:
 232             return None
 233         p = Protocol(self.node, True)
 234         p.factory = self
 235         return p
 236
 237     def _host_to_ident(self, host):
 238         a, b, c, d = host.split('.')
 239         return a, b
 240
 241     def proto_made_connection(self, proto):
 242         ident = self._host_to_ident(proto.transport.getPeer().host)
 243         self.conns[ident] = self.conns.get(ident, 0) + 1
 244     def proto_lost_connection(self, proto, reason):
 245         ident = self._host_to_ident(proto.transport.getPeer().host)
 246         self.conns[ident] -= 1
 247         if not self.conns[ident]:
 248             del self.conns[ident]
 249
 250     def proto_connected(self, proto):
 251         self.node.got_conn(proto)
 252     def proto_disconnected(self, proto, reason):
 253         self.node.lost_conn(proto, reason)
 254
 255     def start(self):
 256         assert not self.running
 257         self.running = True
 258
 259         def attempt_listen():
 260             if not self.running:
 261                 return
 262             try:
 263                 self.listen_port = reactor.listenTCP(self.node.port, self)
 264             except error.CannotListenError, e:
 265                 print >>sys.stderr, 'Error binding to P2P port: %s. Retrying in 3 seconds.' % (e.socketError,)
 266                 reactor.callLater(3, attempt_listen)
 267         attempt_listen()
 268
 269     def stop(self):
 270         assert self.running
 271         self.running = False
 272
 273         self.listen_port.stopListening()
 274
 275 class ClientFactory(protocol.ClientFactory):
 276     def __init__(self, node, desired_conns, max_attempts):
 277         self.node = node
 278         self.desired_conns = desired_conns
 279         self.max_attempts = max_attempts
 280
 281         self.attempts = set()
 282         self.conns = set()
 283         self.running = False
 284
 285     def _host_to_ident(self, host):
 286         a, b, c, d = host.split('.')
 287         return a, b
 288
 289     def buildProtocol(self, addr):
 290         p = Protocol(self.node, False)
 291         p.factory = self
 292         return p
 293
 294     def startedConnecting(self, connector):
 295         ident = self._host_to_ident(connector.getDestination().host)
 296         if ident in self.attempts:
 297             raise AssertionError('already have attempt')
 298         self.attempts.add(ident)
 299
 300     def clientConnectionFailed(self, connector, reason):
 301         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 302
 303     def clientConnectionLost(self, connector, reason):
 304         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 305
 306     def proto_made_connection(self, proto):
 307         pass
 308     def proto_lost_connection(self, proto, reason):
 309         pass
 310
 311     def proto_connected(self, proto):
 312         self.conns.add(proto)
 313         self.node.got_conn(proto)
 314     def proto_disconnected(self, proto, reason):
 315         self.conns.remove(proto)
 316         self.node.lost_conn(proto, reason)
 317
 318     def start(self):
 319         assert not self.running
 320         self.running = True
 321         self._think()
 322     def stop(self):
 323         assert self.running
 324         self.running = False
 325
 326     @defer.inlineCallbacks
 327     def _think(self):
 328         while self.running:
 329             try:
 330                 if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store:
 331                     (host, port), = self.node.get_good_peers(1)
 332
 333                     if self._host_to_ident(host) not in self.attempts:
 334                         #print 'Trying to connect to', host, port
 335                         reactor.connectTCP(host, port, self, timeout=5)
 336             except:
 337                 log.err()
 338
 339             yield deferral.sleep(random.expovariate(1/1))
 340
 341 class SingleClientFactory(protocol.ReconnectingClientFactory):
 342     def __init__(self, node):
 343         self.node = node
 344
 345     def buildProtocol(self, addr):
 346         p = Protocol(self.node, incoming=False)
 347         p.factory = self
 348         return p
 349
 350     def proto_made_connection(self, proto):
 351         pass
 352     def proto_lost_connection(self, proto, reason):
 353         pass
 354
 355     def proto_connected(self, proto):
 356         self.resetDelay()
 357         self.node.got_conn(proto)
 358     def proto_disconnected(self, proto, reason):
 359         self.node.lost_conn(proto, reason)
 360
 361 class Node(object):
 362     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):
 363         self.best_share_hash_func = best_share_hash_func
 364         self.port = port
 365         self.net = net
 366         self.addr_store = dict(addr_store)
 367         self.connect_addrs = connect_addrs
 368         self.preferred_storage = preferred_storage
 369
 370         self.nonce = random.randrange(2**64)
 371         self.peers = {}
 372         self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts)
 373         self.serverfactory = ServerFactory(self, max_incoming_conns)
 374         self.running = False
 375
 376     def start(self):
 377         if self.running:
 378             raise ValueError('already running')
 379
 380         self.clientfactory.start()
 381         self.serverfactory.start()
 382         self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs]
 383
 384         self.running = True
 385
 386         self._think2()
 387
 388     @defer.inlineCallbacks
 389     def _think2(self):
 390         while self.running:
 391             try:
 392                 if len(self.addr_store) < self.preferred_storage and self.peers:
 393                     random.choice(self.peers.values()).send_getaddrs(count=8)
 394             except:
 395                 log.err()
 396
 397             yield deferral.sleep(random.expovariate(1/20))
 398
 399     def stop(self):
 400         if not self.running:
 401             raise ValueError('already stopped')
 402
 403         self.running = False
 404
 405         self.clientfactory.stop()
 406         self.serverfactory.stop()
 407         for singleclientconnector in self.singleclientconnectors:
 408             singleclientconnector.factory.stopTrying() # XXX will this disconnect a current connection?
 409         del self.singleclientconnectors
 410
 411     def got_conn(self, conn):
 412         if conn.nonce in self.peers:
 413             raise ValueError('already have peer')
 414         self.peers[conn.nonce] = conn
 415
 416         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)
 417
 418     def lost_conn(self, conn, reason):
 419         if conn.nonce not in self.peers:
 420             raise ValueError('''don't have peer''')
 421         if conn is not self.peers[conn.nonce]:
 422             raise ValueError('wrong conn')
 423         del self.peers[conn.nonce]
 424
 425         print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage())
 426
 427
 428     def got_addr(self, (host, port), services, timestamp):
 429         if (host, port) in self.addr_store:
 430             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 431             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 432         else:
 433             self.addr_store[host, port] = services, timestamp, timestamp
 434
 435     def handle_shares(self, shares, peer):
 436         print 'handle_shares', (shares, peer)
 437
 438     def handle_share_hashes(self, hashes, peer):
 439         print 'handle_share_hashes', (hashes, peer)
 440
 441     def handle_get_shares(self, hashes, parents, stops, peer):
 442         print 'handle_get_shares', (hashes, parents, stops, peer)
 443
 444     def get_good_peers(self, max_count):
 445         t = time.time()
 446         return [x[0] for x in sorted(self.addr_store.iteritems(), key=lambda (k, (services, first_seen, last_seen)): -max(3600, last_seen - first_seen)/max(3600, t - last_seen)*random.expovariate(1))][:max_count]
 447
 448 if __name__ == '__main__':
 449     p = random.randrange(2**15, 2**16)
 450     for i in xrange(5):
 451         p2 = random.randrange(2**15, 2**16)
 452         print p, p2
 453         n = Node(p2, True, {addrdb_key.pack(dict(address='127.0.0.1', port=p)): addrdb_value.pack(dict(services=0, first_seen=int(time.time())-10, last_seen=int(time.time())))})
 454         n.start()
 455         p = p2
 456
 457     reactor.run()