p2p.py

   1 from __future__ import division
   2
   3 import random
   4 import time
   5 import traceback
   6
   7 from twisted.internet import defer, protocol, reactor
   8
   9 import bitcoin_p2p
  10 import conv
  11 import p2pool
  12 import util
  13
  14 # mode
  15 #     0: send hash first (high latency, low bandwidth)
  16 #     1: send entire share (low latency, high bandwidth)
  17
  18 class Protocol(bitcoin_p2p.BaseProtocol):
  19     version = 1
  20     sub_version = ''
  21
  22     def __init__(self, node):
  23         self.node = node
  24
  25         self._prefix = self.node.net.PREFIX
  26
  27     use_checksum = True
  28
  29     message_types = {
  30         'version': bitcoin_p2p.ComposedType([
  31             ('version', bitcoin_p2p.StructType('<I')),
  32             ('services', bitcoin_p2p.StructType('<Q')),
  33             ('addr_to', bitcoin_p2p.address),
  34             ('addr_from', bitcoin_p2p.address),
  35             ('nonce', bitcoin_p2p.StructType('<Q')),
  36             ('sub_version', bitcoin_p2p.VarStrType()),
  37             ('mode', bitcoin_p2p.StructType('<I')),
  38             ('state', bitcoin_p2p.ComposedType([
  39                 ('chain_id', p2pool.chain_id_type),
  40                 ('highest', bitcoin_p2p.ComposedType([
  41                     ('hash', bitcoin_p2p.HashType()),
  42                     ('height', bitcoin_p2p.StructType('<Q')),
  43                 ])),
  44             ])),
  45         ]),
  46
  47         'update_mode': bitcoin_p2p.ComposedType([
  48             ('mode', bitcoin_p2p.StructType('<I')),
  49         ]),
  50
  51         'ping': bitcoin_p2p.ComposedType([]),
  52
  53         'addrme': bitcoin_p2p.ComposedType([
  54             ('port', bitcoin_p2p.StructType('<H')),
  55         ]),
  56         'addrs': bitcoin_p2p.ComposedType([
  57             ('addrs', bitcoin_p2p.ListType(bitcoin_p2p.ComposedType([
  58                 ('timestamp', bitcoin_p2p.StructType('<Q')),
  59                 ('address', bitcoin_p2p.address),
  60             ]))),
  61         ]),
  62         'getaddrs': bitcoin_p2p.ComposedType([
  63             ('count', bitcoin_p2p.StructType('<I')),
  64         ]),
  65
  66         'gettobest': bitcoin_p2p.ComposedType([
  67             ('chain_id', p2pool.chain_id_type),
  68             ('have', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  69         ]),
  70         'getshares': bitcoin_p2p.ComposedType([
  71             ('chain_id', p2pool.chain_id_type),
  72             ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  73         ]),
  74
  75         'share0s': bitcoin_p2p.ComposedType([
  76             ('chains', bitcoin_p2p.ListType(bitcoin_p2p.ComposedType([
  77                 ('chain_id', p2pool.chain_id_type),
  78                 ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  79             ]))),
  80         ]),
  81         'share1s': bitcoin_p2p.ComposedType([
  82             ('share1s', bitcoin_p2p.ListType(p2pool.share1)),
  83         ]),
  84         'share2s': bitcoin_p2p.ComposedType([
  85             ('share2s', bitcoin_p2p.ListType(bitcoin_p2p.block)),
  86         ]),
  87     }
  88
  89     other_version = None
  90     node_var_watch = None
  91     connected2 = False
  92
  93     @property
  94     def mode(self):
  95         return min(self.node.mode_var.value, self.other_mode_var.value)
  96
  97     def connectionMade(self):
  98         bitcoin_p2p.BaseProtocol.connectionMade(self)
  99
 100         chain = self.node.current_work.value['current_chain']
 101         highest_share2 = chain.get_highest_share2()
 102         self.send_version(
 103             version=self.version,
 104             services=0,
 105             addr_to=dict(
 106                 services=0,
 107                 address='::ffff:' + self.transport.getPeer().host,
 108                 port=self.transport.getPeer().port,
 109             ),
 110             addr_from=dict(
 111                 services=0,
 112                 address='::ffff:' + self.transport.getHost().host,
 113                 port=self.transport.getHost().port,
 114             ),
 115             nonce=self.node.nonce,
 116             sub_version=self.sub_version,
 117             mode=self.node.mode_var.value,
 118             state=dict(
 119                 chain_id=p2pool.chain_id_type.unpack(chain.chain_id_data),
 120                 highest=dict(
 121                     hash=highest_share2.share.hash if highest_share2 is not None else 2**256-1,
 122                     height=highest_share2.height if highest_share2 is not None else 0,
 123                 ),
 124             ),
 125         )
 126
 127         self.node_var_watch = self.node.mode_var.changed.watch(lambda new_mode: self.send_set_mode(mode=new_mode))
 128
 129         reactor.callLater(10, self._connect_timeout)
 130
 131     def _connect_timeout(self):
 132         if not self.connected2 and self.transport.connected:
 133             print 'Handshake timed out, disconnecting from %s:%i' % (self.transport.getPeer().host, self.transport.getPeer().port)
 134             self.transport.loseConnection()
 135
 136     @defer.inlineCallbacks
 137     def _think(self):
 138         while self.connected2:
 139             self.send_ping()
 140             yield util.sleep(random.expovariate(1/100))
 141
 142     @defer.inlineCallbacks
 143     def _think2(self):
 144         while self.connected2:
 145             self.send_addrme(port=self.node.port)
 146             #print 'sending addrme'
 147             yield util.sleep(random.expovariate(1/100))
 148
 149     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, state):
 150         self.other_version = version
 151         self.other_services = services
 152         self.other_mode_var = util.Variable(mode)
 153
 154         if nonce == self.node.nonce:
 155             #print 'Detected connection to self, disconnecting from %s:%i' % (self.transport.getPeer().host, self.transport.getPeer().port)
 156             self.transport.loseConnection()
 157             return
 158         if nonce in self.node.peers:
 159             print 'Detected duplicate connection, disconnecting from %s:%i' % (self.transport.getPeer().host, self.transport.getPeer().port)
 160             self.transport.loseConnection()
 161             return
 162
 163         self.nonce = nonce
 164         self.connected2 = True
 165         self.node.got_conn(self)
 166
 167         self._think()
 168         self._think2()
 169
 170         if state['highest']['hash'] != 2**256 - 1:
 171             self.handle_share0s(chains=[dict(
 172                 chain_id=state['chain_id'],
 173                 hashes=[state['highest']['hash']],
 174             )])
 175
 176     def handle_set_mode(self, mode):
 177         self.other_mode_var.set(mode)
 178
 179     def handle_ping(self):
 180         pass
 181
 182     def handle_addrme(self, port):
 183         host = self.transport.getPeer().host
 184         #print 'addrme from', host, port
 185         if host == '127.0.0.1':
 186             if random.random() < .8 and self.node.peers:
 187                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 188         else:
 189             self.node.got_addr(('::ffff:' + self.transport.getPeer().host, port), self.other_services, int(time.time()))
 190             if random.random() < .8 and self.node.peers:
 191                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 192                     dict(
 193                         address=dict(
 194                             services=self.other_services,
 195                             address='::ffff:' + host,
 196                             port=port,
 197                         ),
 198                         timestamp=int(time.time()),
 199                     ),
 200                 ])
 201     def handle_addrs(self, addrs):
 202         for addr_record in addrs:
 203             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 204             if random.random() < .8 and self.node.peers:
 205                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 206     def handle_getaddrs(self, count):
 207         self.send_addrs(addrs=[
 208             dict(
 209                 timestamp=self.node.addr_store[host, port][2],
 210                 address=dict(
 211                     services=self.node.addr_store[host, port][0],
 212                     address=host,
 213                     port=port,
 214                 ),
 215             ) for host, port in
 216             random.sample(self.node.addr_store.keys(), min(count, len(self.node.addr_store)))
 217         ])
 218
 219     def handle_gettobest(self, chain_id, have):
 220         self.node.handle_get_to_best(p2pool.chain_id_type.pack(chain_id), have, self)
 221
 222     def handle_getshares(self, chain_id, hashes):
 223         self.node.handle_get_shares(p2pool.chain_id_type.pack(chain_id), hashes, self)
 224
 225     def handle_share0s(self, chains):
 226         for chain in chains:
 227             for hash_ in chain['hashes']:
 228                 self.node.handle_share_hash(p2pool.chain_id_type.pack(chain['chain_id']), hash_, self)
 229     def handle_share1s(self, share1s):
 230         for share1 in share1s:
 231             hash_ = bitcoin_p2p.block_hash(share1['header'])
 232             if hash_ <= conv.bits_to_target(share1['header']['bits']):
 233                 print 'Dropping peer %s:%i due to invalid share' % (self.transport.getPeer().host, self.transport.getPeer().port)
 234                 self.transport.loseConnection()
 235                 return
 236             share = p2pool.Share(share1['header'], gentx=share1['gentx'])
 237             self.node.handle_share(share, self)
 238     def handle_share2s(self, share2s):
 239         for share2 in share2s:
 240             hash_ = bitcoin_p2p.block_hash(share2['header'])
 241             if not hash_ <= conv.bits_to_target(share2['header']['bits']):
 242                 print 'Dropping peer %s:%i due to invalid share' % (self.transport.getPeer().host, self.transport.getPeer().port)
 243                 self.transport.loseConnection()
 244                 return
 245             share = p2pool.Share(share2['header'], txs=share2['txs'])
 246             self.node.handle_share(share, self)
 247
 248     def send_share(self, share, full=False):
 249         if share.hash <= conv.bits_to_target(share.header['bits']):
 250             self.send_share2s(share2s=[share.as_block()])
 251         else:
 252             if self.mode == 0 and not full:
 253                 self.send_share0s(chains=[dict(
 254                     chain_id=p2pool.chain_id_type.unpack(share.chain_id_data),
 255                     hashes=[share.hash],
 256                 )])
 257             elif self.mode == 1 or full:
 258                 self.send_share1s(share1s=[dict(
 259                     header=share.header,
 260                     gentx=share.gentx,
 261                 )])
 262             else:
 263                 raise ValueError(self.mode)
 264
 265     def connectionLost(self, reason):
 266         if self.node_var_watch is not None:
 267             self.node.mode_var.changed.unwatch(self.node_var_watch)
 268
 269         if self.connected2:
 270             self.node.lost_conn(self)
 271
 272 class ServerFactory(protocol.ServerFactory):
 273     def __init__(self, node):
 274         self.node = node
 275
 276     def buildProtocol(self, addr):
 277         p = Protocol(self.node)
 278         p.factory = self
 279         return p
 280
 281 class ClientFactory(protocol.ClientFactory):
 282     def __init__(self, node):
 283         self.node = node
 284
 285     def buildProtocol(self, addr):
 286         p = Protocol(self.node)
 287         p.factory = self
 288         return p
 289
 290     def startedConnecting(self, connector):
 291         self.node.attempt_started(connector)
 292
 293     def clientConnectionFailed(self, connector, reason):
 294         self.node.attempt_failed(connector)
 295
 296     def clientConnectionLost(self, connector, reason):
 297         self.node.attempt_ended(connector)
 298
 299 addrdb_key = bitcoin_p2p.ComposedType([
 300     ('address', bitcoin_p2p.IPV6AddressType()),
 301     ('port', bitcoin_p2p.StructType('>H')),
 302 ])
 303 addrdb_value = bitcoin_p2p.ComposedType([
 304     ('services', bitcoin_p2p.StructType('<Q')),
 305     ('first_seen', bitcoin_p2p.StructType('<Q')),
 306     ('last_seen', bitcoin_p2p.StructType('<Q')),
 307 ])
 308
 309 class AddrStore(util.DictWrapper):
 310     def encode_key(self, (address, port)):
 311         return addrdb_key.pack(dict(address=address, port=port))
 312     def decode_key(self, encoded_key):
 313         k = addrdb_key.unpack(encoded_key)
 314         return k['address'], k['port']
 315
 316     def encode_value(self, (services, first_seen, last_seen)):
 317         return addrdb_value.pack(dict(services=services, first_seen=first_seen, last_seen=last_seen))
 318     def decode_value(self, encoded_value):
 319         v = addrdb_value.unpack(encoded_value)
 320         return v['services'], v['first_seen'], v['last_seen']
 321
 322 class Node(object):
 323     def __init__(self, current_work, port, net, addr_store=None, preferred_addrs=[], mode=0, desired_peers=10, max_attempts=100):
 324         if addr_store is None:
 325             addr_store = {}
 326
 327         self.port = port
 328         self.net = net
 329         self.addr_store = AddrStore(addr_store)
 330         self.preferred_addrs = preferred_addrs
 331         self.mode_var = util.Variable(mode)
 332         self.desired_peers = desired_peers
 333         self.max_attempts = max_attempts
 334         self.current_work = current_work
 335
 336         self.nonce = random.randrange(2**64)
 337         self.attempts = {}
 338         self.peers = {}
 339         self.running = False
 340
 341     def start(self):
 342         if self.running:
 343             raise ValueError('already running')
 344
 345         self.running = True
 346
 347         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 348
 349         self._think()
 350         self._think2()
 351
 352     @defer.inlineCallbacks
 353     def _think(self):
 354         while self.running:
 355             try:
 356                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 357                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 358                         host, port = random.choice(self.preferred_addrs)
 359                     else:
 360                         host2, port = random.choice(self.addr_store.keys())
 361                         prefix = '::ffff:'
 362                         if not host2.startswith(prefix):
 363                             raise ValueError('invalid address')
 364                         host = host2[len(prefix):]
 365
 366                     if (host, port) not in self.attempts:
 367                         #print 'Trying to connect to', host, port
 368                         reactor.connectTCP(host, port, ClientFactory(self), timeout=10)
 369             except:
 370                 traceback.print_exc()
 371
 372             yield util.sleep(random.expovariate(1/5))
 373
 374     @defer.inlineCallbacks
 375     def _think2(self):
 376         while self.running:
 377             try:
 378                 if len(self.addr_store) < self.preferred_addrs and self.peers:
 379                     random.choice(self.peers.values()).send_getaddrs(count=8)
 380             except:
 381                 traceback.print_exc()
 382
 383             yield util.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.listen_port.stopListening()
 392
 393
 394     def attempt_started(self, connector):
 395         host, port = connector.getDestination().host, connector.getDestination().port
 396         if (host, port) in self.attempts:
 397             raise ValueError('already have attempt')
 398         self.attempts[host, port] = connector
 399
 400     def attempt_failed(self, connector):
 401         self.attempt_ended(connector)
 402
 403     def attempt_ended(self, connector):
 404         host, port = connector.getDestination().host, connector.getDestination().port
 405         if (host, port) not in self.attempts:
 406             raise ValueError("don't have attempt")
 407         if connector is not self.attempts[host, port]:
 408             raise ValueError('wrong connector')
 409         del self.attempts[host, port]
 410
 411
 412     def got_conn(self, conn):
 413         if conn.nonce in self.peers:
 414             raise ValueError('already have peer')
 415         self.peers[conn.nonce] = conn
 416
 417         print 'Connected to peer %s:%i' % (conn.transport.getPeer().host, conn.transport.getPeer().port)
 418
 419     def lost_conn(self, conn):
 420         if conn.nonce not in self.peers:
 421             raise ValueError("don't have peer")
 422         if conn is not self.peers[conn.nonce]:
 423             raise ValueError('wrong conn')
 424         del self.peers[conn.nonce]
 425
 426         print 'Lost peer %s:%i' % (conn.transport.getPeer().host, conn.transport.getPeer().port)
 427
 428
 429     def got_addr(self, (host, port), services, timestamp):
 430         if (host, port) in self.addr_store:
 431             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 432             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 433         else:
 434             self.addr_store[host, port] = services, timestamp, timestamp
 435
 436     def handle_share(self, share, peer):
 437         print 'handle_share', (share, peer)
 438
 439     def handle_share_hash(self, chain_id_data, hash, peer):
 440         print 'handle_share_hash', (chain_id_data, hash, peer)
 441
 442     def handle_get_to_best(self, chain_id_data, have, peer):
 443         print 'handle_get_to_best', (chain_id_data, have, peer)
 444
 445     def handle_get_shares(self, chain_id_data, hashes, peer):
 446         print 'handle_get_shares', (chain_id_data, hashes, peer)
 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='::ffff:' + '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()