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