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         'getsharesbychain': 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             ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  90         ]),
  91
  92         'share0s': bitcoin_p2p.ComposedType([
  93             ('chains', bitcoin_p2p.ListType(bitcoin_p2p.ComposedType([
  94                 ('chain_id', p2pool.chain_id_type),
  95                 ('hashes', bitcoin_p2p.ListType(bitcoin_p2p.HashType())),
  96             ]))),
  97         ]),
  98         'share1s': bitcoin_p2p.ComposedType([
  99             ('share1s', bitcoin_p2p.ListType(p2pool.share1)),
 100         ]),
 101         'share2s': bitcoin_p2p.ComposedType([
 102             ('share2s', bitcoin_p2p.ListType(bitcoin_p2p.block)),
 103         ]),
 104     }
 105
 106     other_version = None
 107     node_var_watch = None
 108     connected2 = False
 109
 110     @property
 111     def mode(self):
 112         return min(self.node.mode_var.value, self.other_mode_var.value)
 113
 114     def connectionMade(self):
 115         bitcoin_p2p.BaseProtocol.connectionMade(self)
 116         if isinstance(self.factory, ClientFactory):
 117             draw_line(self.node.port, self.transport.getPeer().port, (128, 128, 128))
 118
 119         chain = self.node.current_work.value['current_chain']
 120         highest_share2 = chain.get_highest_share2()
 121         self.send_version(
 122             version=self.version,
 123             services=0,
 124             addr_to=dict(
 125                 services=0,
 126                 address='::ffff:' + self.transport.getPeer().host,
 127                 port=self.transport.getPeer().port,
 128             ),
 129             addr_from=dict(
 130                 services=0,
 131                 address='::ffff:' + self.transport.getHost().host,
 132                 port=self.transport.getHost().port,
 133             ),
 134             nonce=self.node.nonce,
 135             sub_version=self.sub_version,
 136             mode=self.node.mode_var.value,
 137             state=dict(
 138                 chain_id=p2pool.chain_id_type.unpack(chain.chain_id_data),
 139                 highest=dict(
 140                     hash=highest_share2.share.hash,
 141                     height=highest_share2.height,
 142                 ),
 143             ),
 144         )
 145
 146         self.node_var_watch = self.node.mode_var.changed.watch(lambda new_mode: self.send_set_mode(mode=new_mode))
 147
 148         self._think()
 149         self._think2()
 150
 151         reactor.callLater(10, self._connect_timeout)
 152
 153     def _connect_timeout(self):
 154         if not self.connected2 and self.transport.connected:
 155             print "Handshake timed out, disconnecting"
 156             self.transport.loseConnection()
 157
 158     @defer.inlineCallbacks
 159     def _think(self):
 160         while self.connected2:
 161             self.send_ping()
 162             yield util.sleep(random.expovariate(1/100))
 163
 164     @defer.inlineCallbacks
 165     def _think2(self):
 166         while self.connected2:
 167             self.send_addrme(port=self.node.port)
 168             yield util.sleep(random.expovariate(1/100))
 169
 170     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, state):
 171         self.other_version = version
 172         self.other_services = services
 173         self.other_mode_var = util.Variable(mode)
 174
 175         if nonce == self.node.nonce:
 176             #print "Detected connection to self, disconnecting"
 177             self.transport.loseConnection()
 178             return
 179
 180         # XXX use state
 181
 182         self.connected2 = True
 183         self.node.got_conn(self, services)
 184         if isinstance(self.factory, ClientFactory):
 185             draw_line(self.node.port, self.transport.getPeer().port, (0, 255, 0))
 186
 187     def handle_set_mode(self, mode):
 188         self.other_mode_var.set(mode)
 189
 190     def handle_ping(self):
 191         pass
 192
 193     def handle_addrme(self, port):
 194         self.node.got_addr(('::ffff:' + self.transport.getPeer().host, port), self.other_services, int(time.time()))
 195         if random.random() < .7 and self.node.peers:
 196             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()))])
 197     def handle_addrs(self, addrs):
 198         for addr_record in addrs:
 199             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 200             if random.random() < .7 and self.node.peers:
 201                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 202     def handle_getaddrs(self, count):
 203         self.send_addrs(addrs=[
 204             dict(
 205                 timestamp=self.node.addr_store[host, port][2],
 206                 address=dict(
 207                     services=self.node.addr_store[host, port][0],
 208                     address=host,
 209                     port=port,
 210                 ),
 211             ) for host, port in
 212             random.sample(self.node.addr_store.keys(), min(count, len(self.node.addr_store)))
 213         ])
 214
 215     def handle_share0s(self, chains):
 216         for chain in chains:
 217             for hash_ in chain['hashes']:
 218                 self.node.handle_share_hash(p2pool.chain_id_type.pack(chain['chain_id']), hash_, self)
 219     def handle_share1s(self, share1s):
 220         for share1 in share1s:
 221             hash_ = bitcoin_p2p.block_hash(share1['header'])
 222             if hash_ <= conv.bits_to_target(share1['header']['bits']):
 223                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 224                 self.transport.loseConnection()
 225                 return
 226             share = p2pool.Share(share1['header'], gentx=share1['gentx'])
 227             self.node.handle_share(share)
 228     def handle_share2s(self, share2s):
 229         for share2 in share2s:
 230             hash_ = bitcoin_p2p.block_hash(share2['header'])
 231             if not hash_ <= conv.bits_to_target(share1['header']['bits']):
 232                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 233                 self.transport.loseConnection()
 234                 return
 235             share = p2pool.Share(share1['header'], txns=share1['txns'])
 236             self.node.handle_share(share)
 237
 238     def send_share(self, share):
 239         if share.hash <= conv.bits_to_target(share.header['bits']):
 240             self.send_share2s(share2s=[share.as_block()])
 241         else:
 242             if self.mode == 0:
 243                 self.send_share0s(chains=[dict(
 244                     chain_id=p2pool.chain_id_type.unpack(share.chain_id_data),
 245                     hashes=[share.hash],
 246                 )])
 247             elif self.mode == 1:
 248                 self.send_share1s(share1s=[dict(
 249                     header=share.header,
 250                     gentx=share.gentx,
 251                 )])
 252             else:
 253                 raise ValueError(self.mode)
 254
 255     def connectionLost(self, reason):
 256         if self.node_var_watch is not None:
 257             self.node.mode_var.changed.unwatch(self.node_var_watch)
 258
 259         if self.connected2:
 260             self.node.lost_conn(self)
 261
 262         if isinstance(self.factory, ClientFactory):
 263             draw_line(self.node.port, self.transport.getPeer().port, (255, 0, 0))
 264
 265 class ServerFactory(protocol.ServerFactory):
 266     def __init__(self, node):
 267         self.node = node
 268
 269     def buildProtocol(self, addr):
 270         p = Protocol(self.node)
 271         p.factory = self
 272         return p
 273
 274 class ClientFactory(protocol.ClientFactory):
 275     def __init__(self, node):
 276         self.node = node
 277
 278     def buildProtocol(self, addr):
 279         p = Protocol(self.node)
 280         p.factory = self
 281         return p
 282
 283     def startedConnecting(self, connector):
 284         self.node.attempt_started(connector)
 285
 286     def clientConnectionFailed(self, connector, reason):
 287         self.node.attempt_failed(connector)
 288
 289     def clientConnectionLost(self, connector, reason):
 290         self.node.attempt_ended(connector)
 291
 292 addrdb_key = bitcoin_p2p.ComposedType([
 293     ('address', bitcoin_p2p.IPV6AddressType()),
 294     ('port', bitcoin_p2p.StructType('>H')),
 295 ])
 296 addrdb_value = bitcoin_p2p.ComposedType([
 297     ('services', bitcoin_p2p.StructType('<Q')),
 298     ('first_seen', bitcoin_p2p.StructType('<Q')),
 299     ('last_seen', bitcoin_p2p.StructType('<Q')),
 300 ])
 301
 302 class AddrStore(util.DictWrapper):
 303     def encode_key(self, (address, port)):
 304         return addrdb_key.pack(dict(address=address, port=port))
 305     def decode_key(self, encoded_key):
 306         k = addrdb_key.unpack(encoded_key)
 307         return k['address'], k['port']
 308
 309     def encode_value(self, (services, first_seen, last_seen)):
 310         return addrdb_value.pack(dict(services=services, first_seen=first_seen, last_seen=last_seen))
 311     def decode_value(self, encoded_value):
 312         v = addrdb_value.unpack(encoded_value)
 313         return v['services'], v['first_seen'], v['last_seen']
 314
 315 class Node(object):
 316     def __init__(self, current_work, port, testnet, addr_store=None, preferred_addrs=[], mode=0, desired_peers=10, max_attempts=100):
 317         if addr_store is None:
 318             addr_store = {}
 319
 320         self.port = port
 321         self.testnet = testnet
 322         self.addr_store = AddrStore(addr_store)
 323         self.preferred_addrs = preferred_addrs
 324         self.mode_var = util.Variable(mode)
 325         self.desired_peers = desired_peers
 326         self.max_attempts = max_attempts
 327         self.current_work = current_work
 328
 329         self.nonce = random.randrange(2**64)
 330         self.attempts = {}
 331         self.peers = {}
 332         self.running = False
 333
 334         draw_circle(self.port)
 335
 336     def start(self):
 337         if self.running:
 338             raise ValueError("already running")
 339
 340         self.running = True
 341
 342         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 343
 344         self._think()
 345         self._think2()
 346
 347     @defer.inlineCallbacks
 348     def _think(self):
 349         while self.running:
 350             try:
 351                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 352                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 353                         host, port = random.choice(self.preferred_addrs)
 354                     else:
 355                         host2, port = random.choice(self.addr_store.keys())
 356                         prefix = '::ffff:'
 357                         if not host2.startswith(prefix):
 358                             raise ValueError("invalid address")
 359                         host = host2[len(prefix):]
 360
 361                     if (host, port) not in self.attempts and (host, port) not in self.peers:
 362                         reactor.connectTCP(host, port, ClientFactory(self), timeout=10)
 363             except:
 364                 traceback.print_exc()
 365
 366             yield util.sleep(random.expovariate(1/5))
 367
 368     @defer.inlineCallbacks
 369     def _think2(self):
 370         while self.running:
 371             try:
 372                 if len(self.addr_store) < self.preferred_addrs and self.peers:
 373                     random.choice(self.peers.values()).send_getaddrs(count=8)
 374             except:
 375                 traceback.print_exc()
 376
 377             yield util.sleep(random.expovariate(1/20))
 378
 379     def stop(self):
 380         if not self.running:
 381             raise ValueError("already stopped")
 382
 383         self.running = False
 384
 385         self.listen_port.stopListening()
 386
 387
 388     def attempt_started(self, connector):
 389         host, port = connector.getDestination().host, connector.getDestination().port
 390         if (host, port) in self.attempts:
 391             raise ValueError("already have attempt")
 392         self.attempts[host, port] = connector
 393
 394     def attempt_failed(self, connector):
 395         self.attempt_ended(connector)
 396
 397     def attempt_ended(self, connector):
 398         host, port = connector.getDestination().host, connector.getDestination().port
 399         if (host, port) not in self.attempts:
 400             raise ValueError("don't have attempt")
 401         if connector is not self.attempts[host, port]:
 402             raise ValueError("wrong connector")
 403         del self.attempts[host, port]
 404
 405
 406     def got_conn(self, conn, services):
 407         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 408         if (host, port) in self.peers:
 409             raise ValueError("already have peer")
 410         self.peers[host, port] = conn
 411
 412         print "Connected to peer %s:%i" % (host, port)
 413
 414     def lost_conn(self, conn):
 415         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 416         if (host, port) not in self.peers:
 417             raise ValueError("don't have peer")
 418         if conn is not self.peers[host, port]:
 419             raise ValueError("wrong conn")
 420         del self.peers[host, port]
 421
 422         print "Lost peer %s:%i" % (host, port)
 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
 433     def handle_share_hash(self, chain_id_data, hash, peer):
 434         pass
 435
 436 if __name__ == '__main__':
 437     p = random.randrange(2**15, 2**16)
 438     for i in xrange(5):
 439         p2 = random.randrange(2**15, 2**16)
 440         print p, p2
 441         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())))})
 442         n.start()
 443         p = p2
 444
 445     reactor.run()