p2p.py

   1 from __future__ import division
   2
   3 import random
   4 import time
   5 import traceback
   6
   7 from twisted.internet import defer, reactor, protocol, task
   8
   9 import bitcoin_p2p
  10 import conv
  11 import util
  12 import p2pool
  13
  14 # mode
  15 #     0: send hash first (high latency, low bandwidth)
  16 #     1: send entire share (low latency, high bandwidth)
  17
  18 if 0:
  19     import pygame
  20     d = pygame.display.set_mode((512, 512))
  21     task.LoopingCall(pygame.display.update).start(.1)
  22     def draw_circle(id, color=(255,0,0)):
  23         id = repr(id)
  24         pygame.draw.circle(d, (255, 0, 0), (hash(id)%512, hash(id)//512%512), 4)
  25     def draw_line(id, id2, color):
  26         id = repr(id)
  27         pygame.draw.line(d, color, (hash(id)%512, hash(id)//512%512), (hash(id2)%512, hash(id2)//512%512))
  28 else:
  29     draw_circle = draw_line = lambda *args, **kwargs: None
  30
  31 class Protocol(bitcoin_p2p.BaseProtocol):
  32     version = 0
  33     sub_version = ""
  34
  35     def __init__(self, node):
  36         self.node = node
  37
  38     @property
  39     def _prefix(self):
  40         if self.node.testnet:
  41             return 'f77cea5d16a2183f'.decode('hex')
  42         else:
  43             return '95ec1eda53c5e716'.decode('hex')
  44
  45     use_checksum = True
  46
  47     message_types = {
  48         'version': bitcoin_p2p.ComposedType([
  49             ('version', bitcoin_p2p.StructType('<I')),
  50             ('services', bitcoin_p2p.StructType('<Q')),
  51             ('addr_to', bitcoin_p2p.address),
  52             ('addr_from', bitcoin_p2p.address),
  53             ('nonce', bitcoin_p2p.StructType('<Q')),
  54             ('sub_version', bitcoin_p2p.VarStrType()),
  55             ('mode', bitcoin_p2p.StructType('<I')),
  56             ('state', bitcoin_p2p.ComposedType([
  57                 ('chain_id', p2pool.chain_id_type),
  58                 ('highest', bitcoin_p2p.ComposedType([
  59                     ('hash', bitcoin_p2p.HashType()),
  60                     ('height', bitcoin_p2p.StructType('<Q')),
  61                 ])),
  62             ])),
  63         ]),
  64
  65         'update_mode': bitcoin_p2p.ComposedType([
  66             ('mode', bitcoin_p2p.StructType('<I')),
  67         ]),
  68
  69         'ping': bitcoin_p2p.ComposedType([]),
  70
  71         'addrme': bitcoin_p2p.ComposedType([
  72             ('port', bitcoin_p2p.StructType('<H')),
  73         ]),
  74         'addrs': bitcoin_p2p.ComposedType([
  75             ('addrs', bitcoin_p2p.ListType(bitcoin_p2p.ComposedType([
  76                 ('timestamp', bitcoin_p2p.StructType('<Q')),
  77                 ('address', bitcoin_p2p.address),
  78             ]))),
  79         ]),
  80         'getaddrs': bitcoin_p2p.ComposedType([
  81             ('count', bitcoin_p2p.StructType('<I')),
  82         ]),
  83
  84         'getsharestohighest': bitcoin_p2p.ComposedType([
  85             ('chain_id', p2pool.chain_id_type),
  86             ('have', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  87         ]),
  88         'getshares': bitcoin_p2p.ComposedType([
  89             ('chain_id', p2pool.chain_id_type),
  90             ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  91         ]),
  92
  93         'share0s': bitcoin_p2p.ComposedType([
  94             ('chains', bitcoin_p2p.ListType(bitcoin_p2p.ComposedType([
  95                 ('chain_id', p2pool.chain_id_type),
  96                 ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  97             ]))),
  98         ]),
  99         'share1s': bitcoin_p2p.ComposedType([
 100             ('share1s', bitcoin_p2p.ListType(p2pool.share1)),
 101         ]),
 102         'share2s': bitcoin_p2p.ComposedType([
 103             ('share2s', bitcoin_p2p.ListType(bitcoin_p2p.block)),
 104         ]),
 105     }
 106
 107     other_version = None
 108     node_var_watch = None
 109     connected2 = False
 110
 111     @property
 112     def mode(self):
 113         return min(self.node.mode_var.value, self.other_mode_var.value)
 114
 115     def connectionMade(self):
 116         bitcoin_p2p.BaseProtocol.connectionMade(self)
 117         if isinstance(self.factory, ClientFactory):
 118             draw_line(self.node.port, self.transport.getPeer().port, (128, 128, 128))
 119
 120         chain = self.node.current_work.value['current_chain']
 121         highest_share2 = chain.get_highest_share2()
 122         self.send_version(
 123             version=self.version,
 124             services=0,
 125             addr_to=dict(
 126                 services=0,
 127                 address='::ffff:' + self.transport.getPeer().host,
 128                 port=self.transport.getPeer().port,
 129             ),
 130             addr_from=dict(
 131                 services=0,
 132                 address='::ffff:' + self.transport.getHost().host,
 133                 port=self.transport.getHost().port,
 134             ),
 135             nonce=self.node.nonce,
 136             sub_version=self.sub_version,
 137             mode=self.node.mode_var.value,
 138             state=dict(
 139                 chain_id=p2pool.chain_id_type.unpack(chain.chain_id_data),
 140                 highest=dict(
 141                     hash=highest_share2.share.hash if highest_share2 is not None else 2**256-1,
 142                     height=highest_share2.height if highest_share2 is not None else 0,
 143                 ),
 144             ),
 145         )
 146
 147         self.node_var_watch = self.node.mode_var.changed.watch(lambda new_mode: self.send_set_mode(mode=new_mode))
 148
 149         self._think()
 150         self._think2()
 151
 152         reactor.callLater(10, self._connect_timeout)
 153
 154     def _connect_timeout(self):
 155         if not self.connected2 and self.transport.connected:
 156             print "Handshake timed out, disconnecting"
 157             self.transport.loseConnection()
 158
 159     @defer.inlineCallbacks
 160     def _think(self):
 161         while self.connected2:
 162             self.send_ping()
 163             yield util.sleep(random.expovariate(1/100))
 164
 165     @defer.inlineCallbacks
 166     def _think2(self):
 167         while self.connected2:
 168             self.send_addrme(port=self.node.port)
 169             yield util.sleep(random.expovariate(1/100))
 170
 171     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, state):
 172         self.other_version = version
 173         self.other_services = services
 174         self.other_mode_var = util.Variable(mode)
 175
 176         if nonce == self.node.nonce:
 177             #print "Detected connection to self, disconnecting"
 178             self.transport.loseConnection()
 179             return
 180
 181
 182         self.connected2 = True
 183         self.node.got_conn(self, services)
 184
 185         if state['highest']['hash'] != 2**256 - 1:
 186             self.handle_share0s(chains=[dict(
 187                 chain_id=state['chain_id'],
 188                 hashes=[state['highest']['hash']],
 189             )])
 190
 191         if isinstance(self.factory, ClientFactory):
 192             draw_line(self.node.port, self.transport.getPeer().port, (0, 255, 0))
 193
 194     def handle_set_mode(self, mode):
 195         self.other_mode_var.set(mode)
 196
 197     def handle_ping(self):
 198         pass
 199
 200     def handle_addrme(self, port):
 201         self.node.got_addr(('::ffff:' + self.transport.getPeer().host, port), self.other_services, int(time.time()))
 202         if random.random() < .7 and self.node.peers:
 203             random.choice(self.node.peers.values()).send_addrs(addrs=[dict(address=dict(services=self.other_services, address='::ffff:' + self.transport.getPeer().host, port=port), timestamp=int(time.time()))])
 204     def handle_addrs(self, addrs):
 205         for addr_record in addrs:
 206             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 207             if random.random() < .7 and self.node.peers:
 208                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 209     def handle_getaddrs(self, count):
 210         self.send_addrs(addrs=[
 211             dict(
 212                 timestamp=self.node.addr_store[host, port][2],
 213                 address=dict(
 214                     services=self.node.addr_store[host, port][0],
 215                     address=host,
 216                     port=port,
 217                 ),
 218             ) for host, port in
 219             random.sample(self.node.addr_store.keys(), min(count, len(self.node.addr_store)))
 220         ])
 221
 222     def handle_getsharestohighest(self, chain_id, have):
 223         self.node.handle_get_shares_to_highest(chain_id, have, self)
 224
 225     def handle_getshares(self, chain_id, hashes):
 226         self.node.handle_get_shares(chain_id, hashes, self)
 227
 228     def handle_share0s(self, chains):
 229         for chain in chains:
 230             for hash_ in chain['hashes']:
 231                 self.node.handle_share_hash(p2pool.chain_id_type.pack(chain['chain_id']), hash_, self)
 232     def handle_share1s(self, share1s):
 233         for share1 in share1s:
 234             hash_ = bitcoin_p2p.block_hash(share1['header'])
 235             if hash_ <= conv.bits_to_target(share1['header']['bits']):
 236                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 237                 self.transport.loseConnection()
 238                 return
 239             share = p2pool.Share(share1['header'], gentx=share1['gentx'])
 240             self.node.handle_share(share)
 241     def handle_share2s(self, share2s):
 242         for share2 in share2s:
 243             hash_ = bitcoin_p2p.block_hash(share2['header'])
 244             if not hash_ <= conv.bits_to_target(share1['header']['bits']):
 245                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 246                 self.transport.loseConnection()
 247                 return
 248             share = p2pool.Share(share1['header'], txns=share1['txns'])
 249             self.node.handle_share(share)
 250
 251     def send_share(self, share):
 252         if share.hash <= conv.bits_to_target(share.header['bits']):
 253             self.send_share2s(share2s=[share.as_block()])
 254         else:
 255             if self.mode == 0:
 256                 self.send_share0s(chains=[dict(
 257                     chain_id=p2pool.chain_id_type.unpack(share.chain_id_data),
 258                     hashes=[share.hash],
 259                 )])
 260             elif self.mode == 1:
 261                 self.send_share1s(share1s=[dict(
 262                     header=share.header,
 263                     gentx=share.gentx,
 264                 )])
 265             else:
 266                 raise ValueError(self.mode)
 267
 268     def connectionLost(self, reason):
 269         if self.node_var_watch is not None:
 270             self.node.mode_var.changed.unwatch(self.node_var_watch)
 271
 272         if self.connected2:
 273             self.node.lost_conn(self)
 274
 275         if isinstance(self.factory, ClientFactory):
 276             draw_line(self.node.port, self.transport.getPeer().port, (255, 0, 0))
 277
 278 class ServerFactory(protocol.ServerFactory):
 279     def __init__(self, node):
 280         self.node = node
 281
 282     def buildProtocol(self, addr):
 283         p = Protocol(self.node)
 284         p.factory = self
 285         return p
 286
 287 class ClientFactory(protocol.ClientFactory):
 288     def __init__(self, node):
 289         self.node = node
 290
 291     def buildProtocol(self, addr):
 292         p = Protocol(self.node)
 293         p.factory = self
 294         return p
 295
 296     def startedConnecting(self, connector):
 297         self.node.attempt_started(connector)
 298
 299     def clientConnectionFailed(self, connector, reason):
 300         self.node.attempt_failed(connector)
 301
 302     def clientConnectionLost(self, connector, reason):
 303         self.node.attempt_ended(connector)
 304
 305 addrdb_key = bitcoin_p2p.ComposedType([
 306     ('address', bitcoin_p2p.IPV6AddressType()),
 307     ('port', bitcoin_p2p.StructType('>H')),
 308 ])
 309 addrdb_value = bitcoin_p2p.ComposedType([
 310     ('services', bitcoin_p2p.StructType('<Q')),
 311     ('first_seen', bitcoin_p2p.StructType('<Q')),
 312     ('last_seen', bitcoin_p2p.StructType('<Q')),
 313 ])
 314
 315 class AddrStore(util.DictWrapper):
 316     def encode_key(self, (address, port)):
 317         return addrdb_key.pack(dict(address=address, port=port))
 318     def decode_key(self, encoded_key):
 319         k = addrdb_key.unpack(encoded_key)
 320         return k['address'], k['port']
 321
 322     def encode_value(self, (services, first_seen, last_seen)):
 323         return addrdb_value.pack(dict(services=services, first_seen=first_seen, last_seen=last_seen))
 324     def decode_value(self, encoded_value):
 325         v = addrdb_value.unpack(encoded_value)
 326         return v['services'], v['first_seen'], v['last_seen']
 327
 328 class Node(object):
 329     def __init__(self, current_work, port, testnet, addr_store=None, preferred_addrs=[], mode=0, desired_peers=10, max_attempts=100):
 330         if addr_store is None:
 331             addr_store = {}
 332
 333         self.port = port
 334         self.testnet = testnet
 335         self.addr_store = AddrStore(addr_store)
 336         self.preferred_addrs = preferred_addrs
 337         self.mode_var = util.Variable(mode)
 338         self.desired_peers = desired_peers
 339         self.max_attempts = max_attempts
 340         self.current_work = current_work
 341
 342         self.nonce = random.randrange(2**64)
 343         self.attempts = {}
 344         self.peers = {}
 345         self.running = False
 346
 347         draw_circle(self.port)
 348
 349     def start(self):
 350         if self.running:
 351             raise ValueError("already running")
 352
 353         self.running = True
 354
 355         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 356
 357         self._think()
 358         self._think2()
 359
 360     @defer.inlineCallbacks
 361     def _think(self):
 362         while self.running:
 363             try:
 364                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 365                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 366                         host, port = random.choice(self.preferred_addrs)
 367                     else:
 368                         host2, port = random.choice(self.addr_store.keys())
 369                         prefix = '::ffff:'
 370                         if not host2.startswith(prefix):
 371                             raise ValueError("invalid address")
 372                         host = host2[len(prefix):]
 373
 374                     if (host, port) not in self.attempts and (host, port) not in self.peers:
 375                         reactor.connectTCP(host, port, ClientFactory(self), timeout=10)
 376             except:
 377                 traceback.print_exc()
 378
 379             yield util.sleep(random.expovariate(1/5))
 380
 381     @defer.inlineCallbacks
 382     def _think2(self):
 383         while self.running:
 384             try:
 385                 if len(self.addr_store) < self.preferred_addrs and self.peers:
 386                     random.choice(self.peers.values()).send_getaddrs(count=8)
 387             except:
 388                 traceback.print_exc()
 389
 390             yield util.sleep(random.expovariate(1/20))
 391
 392     def stop(self):
 393         if not self.running:
 394             raise ValueError("already stopped")
 395
 396         self.running = False
 397
 398         self.listen_port.stopListening()
 399
 400
 401     def attempt_started(self, connector):
 402         host, port = connector.getDestination().host, connector.getDestination().port
 403         if (host, port) in self.attempts:
 404             raise ValueError("already have attempt")
 405         self.attempts[host, port] = connector
 406
 407     def attempt_failed(self, connector):
 408         self.attempt_ended(connector)
 409
 410     def attempt_ended(self, connector):
 411         host, port = connector.getDestination().host, connector.getDestination().port
 412         if (host, port) not in self.attempts:
 413             raise ValueError("don't have attempt")
 414         if connector is not self.attempts[host, port]:
 415             raise ValueError("wrong connector")
 416         del self.attempts[host, port]
 417
 418
 419     def got_conn(self, conn, services):
 420         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 421         if (host, port) in self.peers:
 422             raise ValueError("already have peer")
 423         self.peers[host, port] = conn
 424
 425         print "Connected to peer %s:%i" % (host, port)
 426
 427     def lost_conn(self, conn):
 428         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 429         if (host, port) not in self.peers:
 430             raise ValueError("don't have peer")
 431         if conn is not self.peers[host, port]:
 432             raise ValueError("wrong conn")
 433         del self.peers[host, port]
 434
 435         print "Lost peer %s:%i" % (host, port)
 436
 437
 438     def got_addr(self, (host, port), services, timestamp):
 439         if (host, port) in self.addr_store:
 440             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 441             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 442         else:
 443             self.addr_store[host, port] = services, timestamp, timestamp
 444
 445     def handle_get_shares_to_highest(self, chain_id_data, have, peer):
 446         pass
 447
 448     def handle_get_shares(self, chain_id_data, hashes, peer):
 449         pass
 450
 451     def handle_share_hash(self, chain_id_data, hash, peer):
 452         pass
 453
 454 if __name__ == '__main__':
 455     p = random.randrange(2**15, 2**16)
 456     for i in xrange(5):
 457         p2 = random.randrange(2**15, 2**16)
 458         print p, p2
 459         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())))})
 460         n.start()
 461         p = p2
 462
 463     reactor.run()