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
  14
  15 class Protocol(bitcoin_p2p.BaseProtocol):
  16     version = 2
  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.node.conns.add(self)
  34
  35         self.addr = self.transport.getPeer().host, self.transport.getPeer().port
  36
  37         self.send_version(
  38             version=self.version,
  39             services=0,
  40             addr_to=dict(
  41                 services=0,
  42                 address=self.transport.getPeer().host,
  43                 port=self.transport.getPeer().port,
  44             ),
  45             addr_from=dict(
  46                 services=0,
  47                 address=self.transport.getHost().host,
  48                 port=self.transport.getHost().port,
  49             ),
  50             nonce=self.node.nonce,
  51             sub_version=self.sub_version,
  52             mode=1,
  53             best_share_hash=self.node.best_share_hash_func(),
  54         )
  55
  56         reactor.callLater(10, self._connect_timeout)
  57         self.timeout_delayed = reactor.callLater(100, self._timeout)
  58
  59     def _connect_timeout(self):
  60         if not self.connected2 and self.transport.connected:
  61             print 'Handshake timed out, disconnecting from %s:%i' % self.addr
  62             self.transport.loseConnection()
  63
  64     def gotPacket(self):
  65         if not self.timeout_delayed.called:
  66             self.timeout_delayed.cancel()
  67             self.timeout_delayed = reactor.callLater(100, self._timeout)
  68
  69     def _timeout(self):
  70         if self.transport.connected:
  71             print 'Connection timed out, disconnecting from %s:%i' % self.addr
  72             self.transport.loseConnection()
  73
  74     @defer.inlineCallbacks
  75     def _think(self):
  76         while self.connected2:
  77             self.send_ping()
  78             yield deferral.sleep(random.expovariate(1/100))
  79
  80     @defer.inlineCallbacks
  81     def _think2(self):
  82         while self.connected2:
  83             self.send_addrme(port=self.node.port)
  84             #print 'sending addrme'
  85             yield deferral.sleep(random.expovariate(1/(100*len(self.node.peers) + 1)))
  86
  87     message_version = bitcoin_data.ComposedType([
  88         ('version', bitcoin_data.StructType('<I')),
  89         ('services', bitcoin_data.StructType('<Q')),
  90         ('addr_to', bitcoin_data.address_type),
  91         ('addr_from', bitcoin_data.address_type),
  92         ('nonce', bitcoin_data.StructType('<Q')),
  93         ('sub_version', bitcoin_data.VarStrType()),
  94         ('mode', bitcoin_data.StructType('<I')), # always 1 for legacy compatibility
  95         ('best_share_hash', bitcoin_data.PossiblyNoneType(0, bitcoin_data.HashType())),
  96     ])
  97     def handle_version(self, version, services, addr_to, addr_from, nonce, sub_version, mode, best_share_hash):
  98         self.other_version = version
  99         self.other_sub_version = sub_version[:512]
 100         self.other_services = services
 101
 102         if nonce == self.node.nonce:
 103             #print 'Detected connection to self, disconnecting from %s:%i' % self.addr
 104             self.transport.loseConnection()
 105             return
 106         if nonce in self.node.peers:
 107             #print 'Detected duplicate connection, disconnecting from %s:%i' % self.addr
 108             self.transport.loseConnection()
 109             return
 110
 111         self.nonce = nonce
 112         self.connected2 = True
 113         self.node.got_conn(self)
 114
 115         self._think()
 116         self._think2()
 117
 118         if best_share_hash is not None:
 119             self.node.handle_share_hashes([best_share_hash], self)
 120
 121     message_ping = bitcoin_data.ComposedType([])
 122     def handle_ping(self):
 123         pass
 124
 125     message_addrme = bitcoin_data.ComposedType([
 126         ('port', bitcoin_data.StructType('<H')),
 127     ])
 128     def handle_addrme(self, port):
 129         host = self.transport.getPeer().host
 130         #print 'addrme from', host, port
 131         if host == '127.0.0.1':
 132             if random.random() < .8 and self.node.peers:
 133                 random.choice(self.node.peers.values()).send_addrme(port=port) # services...
 134         else:
 135             self.node.got_addr((self.transport.getPeer().host, port), self.other_services, int(time.time()))
 136             if random.random() < .8 and self.node.peers:
 137                 random.choice(self.node.peers.values()).send_addrs(addrs=[
 138                     dict(
 139                         address=dict(
 140                             services=self.other_services,
 141                             address=host,
 142                             port=port,
 143                         ),
 144                         timestamp=int(time.time()),
 145                     ),
 146                 ])
 147
 148     message_addrs = bitcoin_data.ComposedType([
 149         ('addrs', bitcoin_data.ListType(bitcoin_data.ComposedType([
 150             ('timestamp', bitcoin_data.StructType('<Q')),
 151             ('address', bitcoin_data.address_type),
 152         ]))),
 153     ])
 154     def handle_addrs(self, addrs):
 155         for addr_record in addrs:
 156             self.node.got_addr((addr_record['address']['address'], addr_record['address']['port']), addr_record['address']['services'], min(int(time.time()), addr_record['timestamp']))
 157             if random.random() < .8 and self.node.peers:
 158                 random.choice(self.node.peers.values()).send_addrs(addrs=[addr_record])
 159
 160     message_getaddrs = bitcoin_data.ComposedType([
 161         ('count', bitcoin_data.StructType('<I')),
 162     ])
 163     def handle_getaddrs(self, count):
 164         if count > 100:
 165             count = 100
 166         self.send_addrs(addrs=[
 167             dict(
 168                 timestamp=self.node.addr_store[host, port][2],
 169                 address=dict(
 170                     services=self.node.addr_store[host, port][0],
 171                     address=host,
 172                     port=port,
 173                 ),
 174             ) for host, port in
 175             self.node.get_good_peers(count)
 176         ])
 177
 178     message_getshares = bitcoin_data.ComposedType([
 179         ('hashes', bitcoin_data.ListType(bitcoin_data.HashType())),
 180         ('parents', bitcoin_data.VarIntType()),
 181         ('stops', bitcoin_data.ListType(bitcoin_data.HashType())),
 182     ])
 183     def handle_getshares(self, hashes, parents, stops):
 184         self.node.handle_get_shares(hashes, parents, stops, self)
 185
 186     message_shares = bitcoin_data.ComposedType([
 187         ('shares', bitcoin_data.ListType(p2pool_data.share_type)),
 188     ])
 189     def handle_shares(self, shares):
 190         res = []
 191         for share in shares:
 192             share_obj = p2pool_data.Share.from_share(share, self.node.net)
 193             share_obj.peer = self
 194             res.append(share_obj)
 195         self.node.handle_shares(res)
 196
 197     def sendShares(self, shares, full=False):
 198         def att(f, **kwargs):
 199             try:
 200                 f(**kwargs)
 201             except bitcoin_p2p.TooLong:
 202                 att(f, **dict((k, v[:len(v)//2]) for k, v in kwargs.iteritems()))
 203                 att(f, **dict((k, v[len(v)//2:]) for k, v in kwargs.iteritems()))
 204         if shares:
 205             att(self.send_shares, shares=[share.as_share() for share in shares])
 206
 207     def connectionLost(self, reason):
 208         self.node.conns.remove(self)
 209         if self.connected2:
 210             self.node.lost_conn(self)
 211             self.connected2 = False
 212
 213 class ServerFactory(protocol.ServerFactory):
 214     def __init__(self, node):
 215         self.node = node
 216
 217     def buildProtocol(self, addr):
 218         if len(self.node.conns) >= self.node.max_conns:
 219             return None
 220         p = Protocol(self.node)
 221         p.factory = self
 222         return p
 223
 224 class ClientFactory(protocol.ClientFactory):
 225     def __init__(self, node):
 226         self.node = node
 227
 228     def buildProtocol(self, addr):
 229         p = Protocol(self.node)
 230         p.factory = self
 231         return p
 232
 233     def startedConnecting(self, connector):
 234         self.node.attempt_started(connector)
 235
 236     def clientConnectionFailed(self, connector, reason):
 237         self.node.attempt_failed(connector)
 238
 239     def clientConnectionLost(self, connector, reason):
 240         self.node.attempt_ended(connector)
 241
 242 class Node(object):
 243     def __init__(self, best_share_hash_func, port, net, addr_store=None, preferred_addrs=set(), desired_peers=10, max_conns=50, max_attempts=30, preferred_storage=1000):
 244         if addr_store is None:
 245             addr_store = {}
 246
 247         self.best_share_hash_func = best_share_hash_func
 248         self.port = port
 249         self.net = net
 250         self.addr_store = addr_store
 251         self.preferred_addrs = preferred_addrs
 252         self.desired_peers = desired_peers
 253         self.max_conns = max_conns
 254         self.max_attempts = max_attempts
 255         self.preferred_storage = preferred_storage
 256
 257         self.nonce = random.randrange(2**64)
 258         self.conns = set()
 259         self.attempts = {}
 260         self.peers = {}
 261         self.running = False
 262
 263     def start(self):
 264         if self.running:
 265             raise ValueError('already running')
 266
 267         self.running = True
 268
 269         self.listen_port = reactor.listenTCP(self.port, ServerFactory(self))
 270
 271         self._think()
 272         self._think2()
 273
 274     @defer.inlineCallbacks
 275     def _think(self):
 276         while self.running:
 277             try:
 278                 if len(self.peers) < self.desired_peers and len(self.attempts) < self.max_attempts and (len(self.preferred_addrs) or len(self.addr_store)):
 279                     if (random.randrange(2) and len(self.preferred_addrs)) or not len(self.addr_store):
 280                         host, port = random.choice(list(self.preferred_addrs))
 281                     else:
 282                         (host, port), = self.get_good_peers(1)
 283
 284                     if (host, port) not in self.attempts:
 285                         #print 'Trying to connect to', host, port
 286                         reactor.connectTCP(host, port, ClientFactory(self), timeout=5)
 287             except:
 288                 log.err()
 289
 290             yield deferral.sleep(random.expovariate(1/1))
 291
 292     @defer.inlineCallbacks
 293     def _think2(self):
 294         while self.running:
 295             try:
 296                 if len(self.addr_store) < self.preferred_storage and self.peers:
 297                     random.choice(self.peers.values()).send_getaddrs(count=8)
 298             except:
 299                 log.err()
 300
 301             yield deferral.sleep(random.expovariate(1/20))
 302
 303     def stop(self):
 304         if not self.running:
 305             raise ValueError('already stopped')
 306
 307         self.running = False
 308
 309         self.listen_port.stopListening()
 310
 311
 312     def attempt_started(self, connector):
 313         host, port = connector.getDestination().host, connector.getDestination().port
 314         if (host, port) in self.attempts:
 315             raise ValueError('already have attempt')
 316         self.attempts[host, port] = connector
 317
 318     def attempt_failed(self, connector):
 319         self.attempt_ended(connector)
 320
 321     def attempt_ended(self, connector):
 322         host, port = connector.getDestination().host, connector.getDestination().port
 323         if (host, port) not in self.attempts:
 324             raise ValueError('''don't have attempt''')
 325         if connector is not self.attempts[host, port]:
 326             raise ValueError('wrong connector')
 327         del self.attempts[host, port]
 328
 329
 330     def got_conn(self, conn):
 331         if conn.nonce in self.peers:
 332             raise ValueError('already have peer')
 333         self.peers[conn.nonce] = conn
 334
 335         print 'Connected to peer %s:%i. p2pool version: %i %r' % (conn.addr[0], conn.addr[1], conn.other_version, conn.other_sub_version)
 336
 337     def lost_conn(self, conn):
 338         if conn.nonce not in self.peers:
 339             raise ValueError('''don't have peer''')
 340         if conn is not self.peers[conn.nonce]:
 341             raise ValueError('wrong conn')
 342         del self.peers[conn.nonce]
 343
 344         print 'Lost peer %s:%i' % (conn.addr[0], conn.addr[1])
 345
 346
 347     def got_addr(self, (host, port), services, timestamp):
 348         if (host, port) in self.addr_store:
 349             old_services, old_first_seen, old_last_seen = self.addr_store[host, port]
 350             self.addr_store[host, port] = services, old_first_seen, max(old_last_seen, timestamp)
 351         else:
 352             self.addr_store[host, port] = services, timestamp, timestamp
 353
 354     def handle_shares(self, shares, peer):
 355         print 'handle_shares', (shares, peer)
 356
 357     def handle_share_hashes(self, hashes, peer):
 358         print 'handle_share_hashes', (hashes, peer)
 359
 360     def handle_get_shares(self, hashes, parents, stops, peer):
 361         print 'handle_get_shares', (hashes, parents, stops, peer)
 362
 363     def get_good_peers(self, max_count):
 364         t = time.time()
 365         return [x[0] for x in sorted(self.addr_store.iteritems(), key=lambda (k, (services, first_seen, last_seen)): -(last_seen - first_seen)/max(3600, t - last_seen)*random.expovariate(1))][:max_count]
 366
 367 if __name__ == '__main__':
 368     p = random.randrange(2**15, 2**16)
 369     for i in xrange(5):
 370         p2 = random.randrange(2**15, 2**16)
 371         print p, p2
 372         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())))})
 373         n.start()
 374         p = p2
 375
 376     reactor.run()