p2pool/p2p.py

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