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, variable, dicts
  14
  15 class Protocol(bitcoin_p2p.BaseProtocol):
  16     version = 1
  17     sub_version = p2pool.__version__
  18
  19     def __init__(self, node):
  20         self.node = node
  21
  22         self._prefix = self.node.net.PREFIX
  23
  24     max_payload_length = 1000000
  25     use_checksum = True
  26
  27     other_version = None
  28     connected2 = False
  29
  30     def connectionMade(self):
  31         bitcoin_p2p.BaseProtocol.connectionMade(self)
  32
  33         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  34
  35         self.send_version(
  36             version=self.version,
  37             services=0,
  38             addr_to=dict(
  39                 services=0,
  40                 address=self.transport.getPeer().host,
  41                 port=self.transport.getPeer().port,
  42             ),
  43             addr_from=dict(
  44                 services=0,
  45                 address=self.transport.getHost().host,
  46                 port=self.transport.getHost().port,
  47             ),
  48             nonce=self.node.nonce,
  49             sub_version=self.sub_version,
  50             mode=1,
  51             best_share_hash=self.node.current_work.value['best_share_hash'],
  52         )
  53
  54         reactor.callLater(10, self._connect_timeout)
  55         self.timeout_delayed = reactor.callLater(100, self._timeout)
  56
  57     def _connect_timeout(self):
  58         if not self.connected2 and self.transport.connected:
  59             print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  60             self.transport.loseConnection()
  61
  62     def gotPacket(self):
  63         if not self.timeout_delayed.called:
  64             self.timeout_delayed.cancel()
  65             self.timeout_delayed = reactor.callLater(100, self._timeout)
  66
  67     def _timeout(self):
  68         if self.transport.connected:
  69             print 'Connection timed out, disconnecting from %s:%i' % self.addr
  70             self.transport.loseConnection()
  71
  72     @defer.inlineCallbacks
  73     def _think(self):
  74         while self.connected2:
  75             self.send_ping()
  76             yield deferral.sleep(random.expovariate(1/100))
  77
  78     @defer.inlineCallbacks
  79     def _think2(self):
  80         while self.connected2:
  81             self.send_addrme(port=self.node.port)
  82             #print 'sending addrme'
  83             yield deferral.sleep(random.expovariate(1/(100*len(self.node.peers) + 1)))
  84
  85     message_version = bitcoin_data.ComposedType([
  86         ('version', bitcoin_data.StructType('<I')),
  87         ('services', bitcoin_data.StructType('<Q')),
  88         ('addr_to', bitcoin_data.address_type),
  89         ('addr_from', bitcoin_data.address_type),
  90         ('nonce', bitcoin_data.StructType('<Q')),
  91         ('sub_version', bitcoin_data.VarStrType()),
  92         ('mode', bitcoin_data.StructType('<I')), # always 1 for legacy compatibility
  93         ('best_share_hash', bitcoin_data.PossiblyNoneType(0, bitcoin_data.HashType())),
  94     ])
  95     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
  96         self.other_version = version
  97         self.other_sub_version = sub_version[:512]
  98         self.other_services = services
  99
 100         if nonce == self.node.nonce:
 101             #print 'Detected connection to self, disconnecting from %s:%i' % self.addr
 102             self.transport.loseConnection()
 103             return
 104         if nonce in self.node.peers:
 105             #print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 106             self.transport.loseConnection()
 107             return
 108
 109         self.nonce = nonce
 110         self.connected2 = True
 111         self.node.got_conn(self)
 112
 113         self._think()
 114         self._think2()
 115
 116         if best_share_hash is not None:
 117             self.node.handle_share_hashes([best_share_hash], self)
 118
 119     message_ping = bitcoin_data.ComposedType([])
 120     def handle_ping(self):
 121         pass
 122
 123     message_addrme = bitcoin_data.ComposedType([
 124         ('port', bitcoin_data.StructType('<H')),
 125     ])
 126     def handle_addrme(self, port):
 127         host = self.transport.getPeer().host
 128         #print 'addrme from', host, port
 129         if host == '127.0.0.1':
 130             if random.random() < .8 and self.node.peers:
 131                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 132         else:
 133             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 134             if random.random() < .8 and self.node.peers:
 135                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 136                     dict(
 137                         address=dict(
 138                             services=self.other_services,
 139                             address=host,
 140                             port=port,
 141                         ),
 142                         timestamp=int(time.time()),
 143                     ),
 144                 ])
 145
 146     message_addrs = bitcoin_data.ComposedType([
 147         ('addrs', bitcoin_data.ListType(bitcoin_data.ComposedType([
 148             ('timestamp', bitcoin_data.StructType('<Q')),
 149             ('address', bitcoin_data.address_type),
 150         ]))),
 151     ])
 152     def handle_addrs(self, addrs):
 153         for addr_record in addrs:
 154             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 155             if random.random() < .8 and self.node.peers:
 156                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 157
 158     message_getaddrs = bitcoin_data.ComposedType([
 159         ('count', bitcoin_data.StructType('<I')),
 160     ])
 161     def handle_getaddrs(self, count):
 162         if count > 100:
 163             count = 100
 164         self.send_addrs(addrs=[
 165             dict(
 166                 timestamp=self.node.addr_store[host, port][2],
 167                 address=dict(
 168                     services=self.node.addr_store[host, port][0],
 169                     address=host,
 170                     port=port,
 171                 ),
 172             ) for host, port in
 173             random.sample(self.node.addr_store.keys(), min(count, len(self.node.addr_store)))
 174         ])
 175
 176     message_getshares = bitcoin_data.ComposedType([
 177         ('hashes', bitcoin_data.ListType(bitcoin_data.HashType())),
 178         ('parents', bitcoin_data.VarIntType()),
 179         ('stops', bitcoin_data.ListType(bitcoin_data.HashType())),
 180     ])
 181     def handle_getshares(self, hashes, parents, stops):
 182         self.node.handle_get_shares(hashes, parents, stops, self)
 183
 184     message_share1as = bitcoin_data.ComposedType([
 185         ('share1as', bitcoin_data.ListType(p2pool_data.share1a_type)),
 186     ])
 187     def handle_share1as(self, share1as):
 188         shares = []
 189         for share1a in share1as:
 190             # use scrypt for Litecoin
 191             if (getattr(self.node.net, 'BITCOIN_POW_SCRYPT', False)):
 192                 hash_ = bitcoin_data.block_header_type.scrypt(share1a['header']);
 193             else:
 194                 hash_ = bitcoin_data.block_header_type.hash256(share1a['header'])
 195             if hash_ <= share1a['header']['target']:
 196                 print 'Dropping peer %s:%i due to invalid share' % self.addr
 197                 self.transport.loseConnection()
 198                 return
 199             share = p2pool_data.Share.from_share1a(share1a, self.node.net)
 200             share.peer = self # XXX
 201             shares.append(share)
 202         self.node.handle_shares(shares, self)
 203
 204     message_share1bs = bitcoin_data.ComposedType([
 205         ('share1bs', bitcoin_data.ListType(p2pool_data.share1b_type)),
 206     ])
 207     def handle_share1bs(self, share1bs):
 208         shares = []
 209         for share1b in share1bs:
 210             # use scrypt for Litecoin
 211             if (getattr(self.node.net, 'BITCOIN_POW_SCRYPT', False)):
 212                 hash_ = bitcoin_data.block_header_type.scrypt(share1b['header']);
 213             else:
 214                 hash_ = bitcoin_data.block_header_type.hash256(share1b['header'])
 215             if not hash_ <= share1b['header']['target']:
 216                 print 'Dropping peer %s:%i due to invalid share' % self.addr
 217                 self.transport.loseConnection()
 218                 return
 219             share = p2pool_data.Share.from_share1b(share1b, self.node.net)
 220             share.peer = self # XXX
 221             shares.append(share)
 222         self.node.handle_shares(shares, self)
 223
 224     def send_shares(self, shares):
 225         share1bs = []
 226         share1as = []
 227         # XXX doesn't need to send full block when it's not urgent
 228         # eg. when getting history
 229         for share in shares:
 230             if share.bitcoin_hash <= share.header['target']:
 231                 share1bs.append(share.as_share1b())
 232             else:
 233                 share1as.append(share.as_share1a())
 234         def att(f, **kwargs):
 235             try:
 236                 f(**kwargs)
 237             except bitcoin_p2p.TooLong:
 238                 att(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
 239                 att(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
 240         if share1bs: att(self.send_share1bs, share1bs=share1bs)
 241         if share1as: att(self.send_share1as, share1as=share1as)
 242
 243     def connectionLost(self, reason):
 244         if self.connected2:
 245             self.node.lost_conn(self)
 246
 247 class ServerFactory(protocol.ServerFactory):
 248     def __init__(self, node):
 249         self.node = node
 250
 251     def buildProtocol(self, addr):
 252         p = Protocol(self.node)
 253         p.factory = self
 254         return p
 255
 256 class ClientFactory(protocol.ClientFactory):
 257     def __init__(self, node):
 258         self.node = node
 259
 260     def buildProtocol(self, addr):
 261         p = Protocol(self.node)
 262         p.factory = self
 263         return p
 264
 265     def startedConnecting(self, connector):
 266         self.node.attempt_started(connector)
 267
 268     def clientConnectionFailed(self, connector, reason):
 269         self.node.attempt_failed(connector)
 270
 271     def clientConnectionLost(self, connector, reason):
 272         self.node.attempt_ended(connector)
 273
 274 addrdb_key = bitcoin_data.ComposedType([
 275     ('address', bitcoin_data.IPV6AddressType()),
 276     ('port', bitcoin_data.StructType('>H')),
 277 ])
 278 addrdb_value = bitcoin_data.ComposedType([
 279     ('services', bitcoin_data.StructType('<Q')),
 280     ('first_seen', bitcoin_data.StructType('<Q')),
 281     ('last_seen', bitcoin_data.StructType('<Q')),
 282 ])
 283
 284 class AddrStore(dicts.DictWrapper):
 285     def encode_key(self, (address, port)):
 286         return addrdb_key.pack(dict(address=address, port=port))
 287     def decode_key(self, encoded_key):
 288         k = addrdb_key.unpack(encoded_key)
 289         return k['address'], k['port']
 290
 291     def encode_value(self, (services, first_seen, last_seen)):
 292         return addrdb_value.pack(dict(services=services, first_seen=first_seen, last_seen=last_seen))
 293     def decode_value(self, encoded_value):
 294         v = addrdb_value.unpack(encoded_value)
 295         return v['services'], v['first_seen'], v['last_seen']
 296
 297 class Node(object):
 298     def __init__(self, current_work, port, net, addr_store=None, preferred_addrs=set(), desired_peers=10, max_attempts=100, preferred_storage=1000):
 299         if addr_store is None:
 300             addr_store = {}
 301
 302         self.port = port
 303         self.net = net
 304         self.addr_store = AddrStore(addr_store)
 305         self.preferred_addrs = preferred_addrs
 306         self.desired_peers = desired_peers
 307         self.max_attempts = max_attempts
 308         self.current_work = current_work
 309         self.preferred_storage = preferred_storage
 310
 311         self.nonce = random.randrange(2**64)
 312         self.attempts = {}
 313         self.peers = {}
 314         self.running = False
 315
 316     def start(self):
 317         if self.running:
 318             raise ValueError('already running')
 319
 320         self.running = True
 321
 322         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 323
 324         self._think()
 325         self._think2()
 326
 327     @defer.inlineCallbacks
 328     def _think(self):
 329         while self.running:
 330             try:
 331                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 332                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 333                         host, port = random.choice(list(self.preferred_addrs))
 334                     else:
 335                         host, port = random.choice(self.addr_store.keys())
 336
 337                     if (host, port) not in self.attempts:
 338                         #print 'Trying to connect to', host, port
 339                         reactor.connectTCP(host, port, ClientFactory(self), timeout=10)
 340             except:
 341                 log.err()
 342
 343             yield deferral.sleep(random.expovariate(1/5))
 344
 345     @defer.inlineCallbacks
 346     def _think2(self):
 347         while self.running:
 348             try:
 349                 if len(self.addr_store) < self.preferred_storage and self.peers:
 350                     random.choice(self.peers.values()).send_getaddrs(count=8)
 351             except:
 352                 log.err()
 353
 354             yield deferral.sleep(random.expovariate(1/20))
 355
 356     def stop(self):
 357         if not self.running:
 358             raise ValueError('already stopped')
 359
 360         self.running = False
 361
 362         self.listen_port.stopListening()
 363
 364
 365     def attempt_started(self, connector):
 366         host, port = connector.getDestination().host, connector.getDestination().port
 367         if (host, port) in self.attempts:
 368             raise ValueError('already have attempt')
 369         self.attempts[host, port] = connector
 370
 371     def attempt_failed(self, connector):
 372         self.attempt_ended(connector)
 373
 374     def attempt_ended(self, connector):
 375         host, port = connector.getDestination().host, connector.getDestination().port
 376         if (host, port) not in self.attempts:
 377             raise ValueError('''don't have attempt''')
 378         if connector is not self.attempts[host, port]:
 379             raise ValueError('wrong connector')
 380         del self.attempts[host, port]
 381
 382
 383     def got_conn(self, conn):
 384         if conn.nonce in self.peers:
 385             raise ValueError('already have peer')
 386         self.peers[conn.nonce] = conn
 387
 388         print 'Connected to peer %s:%i. p2pool version: %r' % (conn.addr[0], conn.addr[1], conn.other_sub_version)
 389
 390     def lost_conn(self, conn):
 391         if conn.nonce not in self.peers:
 392             raise ValueError('''don't have peer''')
 393         if conn is not self.peers[conn.nonce]:
 394             raise ValueError('wrong conn')
 395         del self.peers[conn.nonce]
 396
 397         print 'Lost peer %s:%i' % (conn.addr[0], conn.addr[1])
 398
 399
 400     def got_addr(self, (host, port), services, timestamp):
 401         if (host, port) in self.addr_store:
 402             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 403             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 404         else:
 405             self.addr_store[host, port] = services, timestamp, timestamp
 406
 407     def handle_shares(self, shares, peer):
 408         print 'handle_shares', (shares, peer)
 409
 410     def handle_share_hashes(self, hashes, peer):
 411         print 'handle_share_hashes', (hashes, peer)
 412
 413     def handle_get_shares(self, hashes, parents, stops, peer):
 414         print 'handle_get_shares', (hashes, parents, stops, peer)
 415
 416 if __name__ == '__main__':
 417     p = random.randrange(2**15, 2**16)
 418     for i in xrange(5):
 419         p2 = random.randrange(2**15, 2**16)
 420         print p, p2
 421         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())))})
 422         n.start()
 423         p = p2
 424
 425     reactor.run()