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         self.node = node
  22         self.incoming = incoming
  23
  24         self._prefix = self.node.net.PREFIX
  25
  26     max_payload_length = 1000000
  27
  28     other_version = None
  29     connected2 = False
  30
  31     def connectionMade(self):
  32         bitcoin_p2p.BaseProtocol.connectionMade(self)
  33
  34         self.factory.proto_made_connection(self)
  35
  36         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  37
  38         self.send_version(
  39             version=self.version,
  40             services=0,
  41             addr_to=dict(
  42                 services=0,
  43                 address=self.transport.getPeer().host,
  44                 port=self.transport.getPeer().port,
  45             ),
  46             addr_from=dict(
  47                 services=0,
  48                 address=self.transport.getHost().host,
  49                 port=self.transport.getHost().port,
  50             ),
  51             nonce=self.node.nonce,
  52             sub_version=self.sub_version,
  53             mode=1,
  54             best_share_hash=self.node.best_share_hash_func(),
  55         )
  56
  57         reactor.callLater(10, self._connect_timeout)
  58         self.timeout_delayed = reactor.callLater(100, self._timeout)
  59
  60         old_dataReceived = self.dataReceived
  61         def new_dataReceived(data):
  62             if not self.timeout_delayed.called:
  63                 self.timeout_delayed.reset(100)
  64             old_dataReceived(data)
  65         self.dataReceived = new_dataReceived
  66
  67     def _connect_timeout(self):
  68         if not self.connected2 and self.transport.connected:
  69             print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  70             self.transport.loseConnection()
  71
  72     def packetReceived(self, command, payload2):
  73         if command != 'version' and not self.connected2:
  74             self.transport.loseConnection()
  75             return
  76
  77         bitcoin_p2p.BaseProtocol.packetReceived(self, command, payload2)
  78
  79     def _timeout(self):
  80         if self.transport.connected:
  81             print 'Connection timed out, disconnecting from %s:%i' % self.addr
  82             self.transport.loseConnection()
  83
  84     @defer.inlineCallbacks
  85     def _think(self):
  86         while self.connected2:
  87             self.send_ping()
  88             yield deferral.sleep(random.expovariate(1/100))
  89
  90     @defer.inlineCallbacks
  91     def _think2(self):
  92         while self.connected2:
  93             self.send_addrme(port=self.node.port)
  94             #print 'sending addrme'
  95             yield deferral.sleep(random.expovariate(1/(100*len(self.node.peers) + 1)))
  96
  97     message_version = pack.ComposedType([
  98         ('version', pack.IntType(32)),
  99         ('services', pack.IntType(64)),
 100         ('addr_to', bitcoin_data.address_type),
 101         ('addr_from', bitcoin_data.address_type),
 102         ('nonce', pack.IntType(64)),
 103         ('sub_version', pack.VarStrType()),
 104         ('mode', pack.IntType(32)), # always 1 for legacy compatibility
 105         ('best_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
 106     ])
 107     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
 108         if self.other_version is not None or version < 2:
 109             self.transport.loseConnection()
 110             return
 111
 112         self.other_version = version
 113         self.other_sub_version = sub_version[:512]
 114         self.other_services = services
 115
 116         if nonce == self.node.nonce:
 117             #print 'Detected connection to self, disconnecting from %s:%i' % self.addr
 118             self.transport.loseConnection()
 119             return
 120         if nonce in self.node.peers:
 121             #print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 122             self.transport.loseConnection()
 123             return
 124
 125         self.nonce = nonce
 126         self.connected2 = True
 127         self.factory.proto_connected(self)
 128
 129         self._think()
 130         self._think2()
 131
 132         if best_share_hash is not None:
 133             self.node.handle_share_hashes([best_share_hash], self)
 134
 135     message_ping = pack.ComposedType([])
 136     def handle_ping(self):
 137         pass
 138
 139     message_addrme = pack.ComposedType([
 140         ('port', pack.IntType(16)),
 141     ])
 142     def handle_addrme(self, port):
 143         host = self.transport.getPeer().host
 144         #print 'addrme from', host, port
 145         if host == '127.0.0.1':
 146             if random.random() < .8 and self.node.peers:
 147                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 148         else:
 149             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 150             if random.random() < .8 and self.node.peers:
 151                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 152                     dict(
 153                         address=dict(
 154                             services=self.other_services,
 155                             address=host,
 156                             port=port,
 157                         ),
 158                         timestamp=int(time.time()),
 159                     ),
 160                 ])
 161
 162     message_addrs = pack.ComposedType([
 163         ('addrs', pack.ListType(pack.ComposedType([
 164             ('timestamp', pack.IntType(64)),
 165             ('address', bitcoin_data.address_type),
 166         ]))),
 167     ])
 168     def handle_addrs(self, addrs):
 169         for addr_record in addrs:
 170             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 171             if random.random() < .8 and self.node.peers:
 172                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 173
 174     message_getaddrs = pack.ComposedType([
 175         ('count', pack.IntType(32)),
 176     ])
 177     def handle_getaddrs(self, count):
 178         if count > 100:
 179             count = 100
 180         self.send_addrs(addrs=[
 181             dict(
 182                 timestamp=self.node.addr_store[host, port][2],
 183                 address=dict(
 184                     services=self.node.addr_store[host, port][0],
 185                     address=host,
 186                     port=port,
 187                 ),
 188             ) for host, port in
 189             self.node.get_good_peers(count)
 190         ])
 191
 192     message_getshares = pack.ComposedType([
 193         ('hashes', pack.ListType(pack.IntType(256))),
 194         ('parents', pack.VarIntType()),
 195         ('stops', pack.ListType(pack.IntType(256))),
 196     ])
 197     def handle_getshares(self, hashes, parents, stops):
 198         self.node.handle_get_shares(hashes, parents, stops, self)
 199
 200     message_shares = pack.ComposedType([
 201         ('shares', pack.ListType(p2pool_data.share_type)),
 202     ])
 203     def handle_shares(self, shares):
 204         res = []
 205         for share in shares:
 206             share_obj = p2pool_data.Share.from_share(share, self.node.net)
 207             share_obj.peer = self
 208             res.append(share_obj)
 209         self.node.handle_shares(res, self)
 210
 211     def sendShares(self, shares, full=False):
 212         def att(f, **kwargs):
 213             try:
 214                 f(**kwargs)
 215             except bitcoin_p2p.TooLong:
 216                 att(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
 217                 att(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
 218         if shares:
 219             att(self.send_shares, shares=[share.as_share() for share in shares])
 220
 221     def connectionLost(self, reason):
 222         if self.connected2:
 223             self.factory.proto_disconnected(self, reason)
 224             self.connected2 = False
 225         self.factory.proto_lost_connection(self, reason)
 226
 227 class ServerFactory(protocol.ServerFactory):
 228     def __init__(self, node, max_conns):
 229         self.node = node
 230         self.max_conns = max_conns
 231
 232         self.conns = {}
 233         self.running = False
 234
 235     def buildProtocol(self, addr):
 236         if sum(self.conns.itervalues()) >= self.max_conns or self.conns.get(self._host_to_ident(addr.host), 0) >= 3:
 237             return None
 238         p = Protocol(self.node, True)
 239         p.factory = self
 240         return p
 241
 242     def _host_to_ident(self, host):
 243         a, b, c, d = host.split('.')
 244         return a, b
 245
 246     def proto_made_connection(self, proto):
 247         ident = self._host_to_ident(proto.transport.getPeer().host)
 248         self.conns[ident] = self.conns.get(ident, 0) + 1
 249     def proto_lost_connection(self, proto, reason):
 250         ident = self._host_to_ident(proto.transport.getPeer().host)
 251         self.conns[ident] -= 1
 252         if not self.conns[ident]:
 253             del self.conns[ident]
 254
 255     def proto_connected(self, proto):
 256         self.node.got_conn(proto)
 257     def proto_disconnected(self, proto, reason):
 258         self.node.lost_conn(proto, reason)
 259
 260     def start(self):
 261         assert not self.running
 262         self.running = True
 263
 264         def attempt_listen():
 265             if not self.running:
 266                 return
 267             try:
 268                 self.listen_port = reactor.listenTCP(self.node.port, self)
 269             except error.CannotListenError, e:
 270                 print >>sys.stderr, 'Error binding to P2P port: %s. Retrying in 3 seconds.' % (e.socketError,)
 271                 reactor.callLater(3, attempt_listen)
 272         attempt_listen()
 273
 274     def stop(self):
 275         assert self.running
 276         self.running = False
 277
 278         self.listen_port.stopListening()
 279
 280 class ClientFactory(protocol.ClientFactory):
 281     def __init__(self, node, desired_conns, max_attempts):
 282         self.node = node
 283         self.desired_conns = desired_conns
 284         self.max_attempts = max_attempts
 285
 286         self.attempts = set()
 287         self.conns = set()
 288         self.running = False
 289
 290     def _host_to_ident(self, host):
 291         a, b, c, d = host.split('.')
 292         return a, b
 293
 294     def buildProtocol(self, addr):
 295         p = Protocol(self.node, False)
 296         p.factory = self
 297         return p
 298
 299     def startedConnecting(self, connector):
 300         ident = self._host_to_ident(connector.getDestination().host)
 301         if ident in self.attempts:
 302             raise AssertionError('already have attempt')
 303         self.attempts.add(ident)
 304
 305     def clientConnectionFailed(self, connector, reason):
 306         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 307
 308     def clientConnectionLost(self, connector, reason):
 309         self.attempts.remove(self._host_to_ident(connector.getDestination().host))
 310
 311     def proto_made_connection(self, proto):
 312         pass
 313     def proto_lost_connection(self, proto, reason):
 314         pass
 315
 316     def proto_connected(self, proto):
 317         self.conns.add(proto)
 318         self.node.got_conn(proto)
 319     def proto_disconnected(self, proto, reason):
 320         self.conns.remove(proto)
 321         self.node.lost_conn(proto, reason)
 322
 323     def start(self):
 324         assert not self.running
 325         self.running = True
 326         self._think()
 327     def stop(self):
 328         assert self.running
 329         self.running = False
 330
 331     @defer.inlineCallbacks
 332     def _think(self):
 333         while self.running:
 334             try:
 335                 if len(self.conns) < self.desired_conns and len(self.attempts) < self.max_attempts and self.node.addr_store:
 336                     (host, port), = self.node.get_good_peers(1)
 337
 338                     if self._host_to_ident(host) not in self.attempts:
 339                         #print 'Trying to connect to', host, port
 340                         reactor.connectTCP(host, port, self, timeout=5)
 341             except:
 342                 log.err()
 343
 344             yield deferral.sleep(random.expovariate(1/1))
 345
 346 class SingleClientFactory(protocol.ReconnectingClientFactory):
 347     def __init__(self, node):
 348         self.node = node
 349
 350     def buildProtocol(self, addr):
 351         p = Protocol(self.node, incoming=False)
 352         p.factory = self
 353         return p
 354
 355     def proto_made_connection(self, proto):
 356         pass
 357     def proto_lost_connection(self, proto, reason):
 358         pass
 359
 360     def proto_connected(self, proto):
 361         self.resetDelay()
 362         self.node.got_conn(proto)
 363     def proto_disconnected(self, proto, reason):
 364         self.node.lost_conn(proto, reason)
 365
 366 class Node(object):
 367     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):
 368         self.best_share_hash_func = best_share_hash_func
 369         self.port = port
 370         self.net = net
 371         self.addr_store = dict(addr_store)
 372         self.connect_addrs = connect_addrs
 373         self.preferred_storage = preferred_storage
 374
 375         self.nonce = random.randrange(2**64)
 376         self.peers = {}
 377         self.clientfactory = ClientFactory(self, desired_outgoing_conns, max_outgoing_attempts)
 378         self.serverfactory = ServerFactory(self, max_incoming_conns)
 379         self.running = False
 380
 381     def start(self):
 382         if self.running:
 383             raise ValueError('already running')
 384
 385         self.clientfactory.start()
 386         self.serverfactory.start()
 387         self.singleclientconnectors = [reactor.connectTCP(addr, port, SingleClientFactory(self)) for addr, port in self.connect_addrs]
 388
 389         self.running = True
 390
 391         self._think2()
 392
 393     @defer.inlineCallbacks
 394     def _think2(self):
 395         while self.running:
 396             try:
 397                 if len(self.addr_store) < self.preferred_storage and self.peers:
 398                     random.choice(self.peers.values()).send_getaddrs(count=8)
 399             except:
 400                 log.err()
 401
 402             yield deferral.sleep(random.expovariate(1/20))
 403
 404     def stop(self):
 405         if not self.running:
 406             raise ValueError('already stopped')
 407
 408         self.running = False
 409
 410         self.clientfactory.stop()
 411         self.serverfactory.stop()
 412         for singleclientconnector in self.singleclientconnectors:
 413             singleclientconnector.factory.stopTrying() # XXX will this disconnect a current connection?
 414         del self.singleclientconnectors
 415
 416     def got_conn(self, conn):
 417         if conn.nonce in self.peers:
 418             raise ValueError('already have peer')
 419         self.peers[conn.nonce] = conn
 420
 421         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)
 422
 423     def lost_conn(self, conn, reason):
 424         if conn.nonce not in self.peers:
 425             raise ValueError('''don't have peer''')
 426         if conn is not self.peers[conn.nonce]:
 427             raise ValueError('wrong conn')
 428         del self.peers[conn.nonce]
 429
 430         print 'Lost peer %s:%i - %s' % (conn.addr[0], conn.addr[1], reason.getErrorMessage())
 431
 432
 433     def got_addr(self, (host, port), services, timestamp):
 434         if (host, port) in self.addr_store:
 435             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 436             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 437         else:
 438             self.addr_store[host, port] = services, timestamp, timestamp
 439
 440     def handle_shares(self, shares, peer):
 441         print 'handle_shares', (shares, peer)
 442
 443     def handle_share_hashes(self, hashes, peer):
 444         print 'handle_share_hashes', (hashes, peer)
 445
 446     def handle_get_shares(self, hashes, parents, stops, peer):
 447         print 'handle_get_shares', (hashes, parents, stops, peer)
 448
 449     def get_good_peers(self, max_count):
 450         t = time.time()
 451         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]
 452
 453 if __name__ == '__main__':
 454     p = random.randrange(2**15, 2**16)
 455     for i in xrange(5):
 456         p2 = random.randrange(2**15, 2**16)
 457         print p, p2
 458         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())))})
 459         n.start()
 460         p = p2
 461
 462     reactor.run()