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             ('share1s', bitcoin_p2p.ListType(bitcoin_p2p.block)),
 103         ]),
 104     }
 105
 106     other_version = None
 107     node_var_watch = None
 108
 109     @property
 110     def mode(self):
 111         return min(self.node.mode_var.value, self.other_mode_var.value)
 112
 113     def connectionMade(self):
 114         bitcoin_p2p.BaseProtocol.connectionMade(self)
 115         if isinstance(self.factory, ClientFactory):
 116             draw_line(self.node.port, self.transport.getPeer().port, (128, 128, 128))
 117
 118         chain = self.node.current_work['current_chain']
 119         self.send_version(
 120             version=self.version,
 121             services=0,
 122             addr_to=dict(
 123                 services=0,
 124                 address='::ffff:' + self.transport.getPeer().host,
 125                 port=self.transport.getPeer().port,
 126             ),
 127             addr_from=dict(
 128                 services=0,
 129                 address='::ffff:' + self.transport.getHost().host,
 130                 port=self.transport.getHost().port,
 131             ),
 132             nonce=self.node.nonce,
 133             sub_version=self.sub_version,
 134             mode=self.node.mode_var.value,
 135             state=dict(
 136                 chain_id=dict(
 137                     last_p2pool_block_hash=0,
 138                     bits=0,
 139                 ),
 140                 highest=dict(
 141                     hash=0,
 142                     height=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.connected2 = False
 150
 151         self._think()
 152         self._think2()
 153
 154         reactor.callLater(10, self._connect_timeout)
 155
 156     def _connect_timeout(self):
 157         if not self.connected2 and self.transport.connected:
 158             print "Handshake timed out, disconnecting"
 159             self.transport.loseConnection()
 160
 161     @defer.inlineCallbacks
 162     def _think(self):
 163         while self.connected2:
 164             self.send_ping()
 165             yield util.sleep(random.expovariate(1/100))
 166
 167     @defer.inlineCallbacks
 168     def _think2(self):
 169         while self.connected2:
 170             self.send_addrme(port=self.node.port)
 171             yield util.sleep(random.expovariate(1/100))
 172
 173     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, state):
 174         self.other_version = version
 175         self.other_services = services
 176         self.other_mode_var = util.Variable(mode)
 177
 178         if nonce == self.node.nonce:
 179             #print "Detected connection to self, disconnecting"
 180             self.transport.loseConnection()
 181             return
 182
 183         # XXX use state
 184
 185         self.connected2 = True
 186         self.node.got_conn(self, services)
 187         if isinstance(self.factory, ClientFactory):
 188             draw_line(self.node.port, self.transport.getPeer().port, (0, 255, 0))
 189
 190     def handle_set_mode(self, mode):
 191         self.other_mode_var.set(mode)
 192
 193     def handle_ping(self):
 194         pass
 195
 196     def handle_addrme(self, port):
 197         self.node.got_addr(('::ffff:' + self.transport.getPeer().host, port), self.other_services, int(time.time()))
 198         if random.random() < .7 and self.node.peers:
 199             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()))])
 200     def handle_addrs(self, addrs):
 201         for addr_record in addrs:
 202             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 203             if random.random() < .7 and self.node.peers:
 204                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 205     def handle_getaddrs(self, count):
 206         self.send_addrs(addrs=[
 207             dict(
 208                 timestamp=self.node.addr_store[host, port][2],
 209                 address=dict(
 210                     services=self.node.addr_store[host, port][0],
 211                     address=host,
 212                     port=port,
 213                 ),
 214             ) for host, port in
 215             random.sample(self.node.addr_store.keys(), min(count, len(self.node.addr_store)))
 216         ])
 217
 218     def handle_share0s(self, chains):
 219         for chain in chainss:
 220             for hash_ in chain['hashes']:
 221                 self.node.handle_share_hash((chain['chain_id']['previous_p2pool_block'], chain['chain_id']['bits']), hash_)
 222     def handle_share1s(self, share1s):
 223         for share1 in share1s:
 224             hash_ = bitcoin_p2p.block_hash(share1['header'])
 225             if hash_ <= conv.bits_to_target(share1['header']['bits']):
 226                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 227                 self.transport.loseConnection()
 228                 return
 229             share = Share(share1['header'], gentx=share1['gentx'])
 230             self.node.handle_share(share)
 231     def handle_share2s(self, share2s):
 232         for share2 in share2s:
 233             hash_ = bitcoin_p2p.block_hash(share2['header'])
 234             if not hash_ <= conv.bits_to_target(share1['header']['bits']):
 235                 print "Dropping peer %s:%i due to invalid share" % (self.transport.getPeer().host, self.transport.getPeer().port)
 236                 self.transport.loseConnection()
 237                 return
 238             share = Share(share1['header'], txns=share1['txns'])
 239             self.node.handle_share(share)
 240
 241     def send_share(self, share):
 242         if share.hash <= conv.bits_to_target(share.header['bits']):
 243             self.send_share2s(share2s=[share.as_block()])
 244         else:
 245             if self.mode == 0:
 246                 self.send_share0s(chains=[dict(
 247                     chain_id=p2pool.chain_id_type.unpack(share.chain_id_data),
 248                     hashes=[share.hash],
 249                 )])
 250             elif self.mode == 1:
 251                 self.send_share1s(share1s=[dict(
 252                     header=share.header,
 253                     gentx=share.gentx,
 254                 )])
 255             else:
 256                 raise ValueError(self.mode)
 257
 258     def connectionLost(self, reason):
 259         if self.node_var_watch is not None:
 260             self.node.mode_var.changed.unwatch(self.node_var_watch)
 261
 262         if self.connected2:
 263             self.node.lost_conn(self)
 264
 265         if isinstance(self.factory, ClientFactory):
 266             draw_line(self.node.port, self.transport.getPeer().port, (255, 0, 0))
 267
 268 class ServerFactory(protocol.ServerFactory):
 269     def __init__(self, node):
 270         self.node = node
 271
 272     def buildProtocol(self, addr):
 273         p = Protocol(self.node)
 274         p.factory = self
 275         return p
 276
 277 class ClientFactory(protocol.ClientFactory):
 278     def __init__(self, node):
 279         self.node = node
 280
 281     def buildProtocol(self, addr):
 282         p = Protocol(self.node)
 283         p.factory = self
 284         return p
 285
 286     def startedConnecting(self, connector):
 287         self.node.attempt_started(connector)
 288
 289     def clientConnectionFailed(self, connector, reason):
 290         self.node.attempt_failed(connector)
 291
 292     def clientConnectionLost(self, connector, reason):
 293         self.node.attempt_ended(connector)
 294
 295 addrdb_key = bitcoin_p2p.ComposedType([
 296     ('address', bitcoin_p2p.IPV6AddressType()),
 297     ('port', bitcoin_p2p.StructType('>H')),
 298 ])
 299 addrdb_value = bitcoin_p2p.ComposedType([
 300     ('services', bitcoin_p2p.StructType('<Q')),
 301     ('first_seen', bitcoin_p2p.StructType('<Q')),
 302     ('last_seen', bitcoin_p2p.StructType('<Q')),
 303 ])
 304
 305 class AddrStore(util.DictWrapper):
 306     def encode_key(self, (address, port)):
 307         return addrdb_key.pack(dict(address=address, port=port))
 308     def decode_key(self, encoded_key):
 309         k = addrdb_key.unpack(encoded_key)
 310         return k['address'], k['port']
 311
 312     def encode_value(self, (services, first_seen, last_seen)):
 313         return addrdb_value.pack(dict(services=services, first_seen=first_seen, last_seen=last_seen))
 314     def decode_value(self, encoded_value):
 315         v = addrdb_value.unpack(encoded_value)
 316         return v['services'], v['first_seen'], v['last_seen']
 317
 318 class Node(object):
 319     def __init__(self, port, testnet, addr_store=None, preferred_addrs=[], mode=0, desired_peers=10, max_attempts=100):
 320         if addr_store is None:
 321             addr_store = {}
 322
 323         self.port = port
 324         self.testnet = testnet
 325         self.addr_store = AddrStore(addr_store)
 326         self.preferred_addrs = preferred_addrs
 327         self.mode_var = util.Variable(mode)
 328         self.desired_peers = desired_peers
 329         self.max_attempts = max_attempts
 330
 331         self.current_work = dict(current_chain=None)
 332
 333         self.nonce = random.randrange(2**64)
 334         self.attempts = {}
 335         self.peers = {}
 336         self.running = False
 337
 338         draw_circle(self.port)
 339
 340     def start(self):
 341         if self.running:
 342             raise ValueError("already running")
 343
 344         self.running = True
 345
 346         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 347
 348         self._think()
 349         self._think2()
 350
 351     @defer.inlineCallbacks
 352     def _think(self):
 353         while self.running:
 354             try:
 355                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 356                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 357                         host, port = random.choice(self.preferred_addrs)
 358                     else:
 359                         host2, port = random.choice(self.addr_store.keys())
 360                         prefix = '::ffff:'
 361                         if not host2.startswith(prefix):
 362                             raise ValueError("invalid address")
 363                         host = host2[len(prefix):]
 364
 365                     if (host, port) not in self.attempts and (host, port) not in self.peers:
 366                         reactor.connectTCP(host, port, ClientFactory(self), timeout=10)
 367             except:
 368                 traceback.print_exc()
 369
 370             yield util.sleep(random.expovariate(1/5))
 371
 372     @defer.inlineCallbacks
 373     def _think2(self):
 374         while self.running:
 375             try:
 376                 if len(self.addr_store) < self.preferred_addrs and self.peers:
 377                     random.choice(self.peers.values()).send_getaddrs(count=8)
 378             except:
 379                 traceback.print_exc()
 380
 381             yield util.sleep(random.expovariate(1/20))
 382
 383     def stop(self):
 384         if not self.running:
 385             raise ValueError("already stopped")
 386
 387         self.running = False
 388
 389         self.listen_port.stopListening()
 390
 391
 392     def attempt_started(self, connector):
 393         host, port = connector.getDestination().host, connector.getDestination().port
 394         if (host, port) in self.attempts:
 395             raise ValueError("already have attempt")
 396         self.attempts[host, port] = connector
 397
 398     def attempt_failed(self, connector):
 399         self.attempt_ended(connector)
 400
 401     def attempt_ended(self, connector):
 402         host, port = connector.getDestination().host, connector.getDestination().port
 403         if (host, port) not in self.attempts:
 404             raise ValueError("don't have attempt")
 405         if connector is not self.attempts[host, port]:
 406             raise ValueError("wrong connector")
 407         del self.attempts[host, port]
 408
 409
 410     def got_conn(self, conn, services):
 411         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 412         if (host, port) in self.peers:
 413             raise ValueError("already have peer")
 414         self.peers[host, port] = conn
 415
 416         print "Connected to peer %s:%i" % (host, port)
 417
 418     def lost_conn(self, conn):
 419         host, port = conn.transport.getPeer().host, conn.transport.getPeer().port
 420         if (host, port) not in self.peers:
 421             raise ValueError("don't have peer")
 422         if conn is not self.peers[host, port]:
 423             raise ValueError("wrong conn")
 424         del self.peers[host, port]
 425
 426         print "Lost peer %s:%i" % (host, 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 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()