import base64 from binascii import hexlify import hashlib import math import time from pprint import pprint import socket import struct import random import traceback from addresses import calculateInventoryHash from debug import logger from helper_random import randomBytes import helper_random from inventory import Inventory import knownnodes from network.advanceddispatcher import AdvancedDispatcher from network.bmproto import BMProtoError, BMProtoInsufficientDataError, BMProtoExcessiveDataError, BMProto from network.bmobject import BMObject, BMObjectInsufficientPOWError, BMObjectInvalidDataError, BMObjectExpiredError, BMObjectUnwantedStreamError, BMObjectInvalidError, BMObjectAlreadyHaveError import network.connectionpool from network.dandelion import Dandelion from network.node import Node import network.asyncore_pollchoose as asyncore from network.proxy import Proxy, ProxyError, GeneralProxyError from network.objectracker import ObjectTracker from network.socks5 import Socks5Connection, Socks5Resolver, Socks5AuthError, Socks5Error from network.socks4a import Socks4aConnection, Socks4aResolver, Socks4aError from network.tls import TLSDispatcher import addresses from bmconfigparser import BMConfigParser from queues import invQueue, objectProcessorQueue, portCheckerQueue, UISignalQueue, receiveDataQueue import shared import state import protocol class TCPConnection(BMProto, TLSDispatcher): def __init__(self, address=None, sock=None): BMProto.__init__(self, address=address, sock=sock) self.verackReceived = False self.verackSent = False self.streams = [0] self.fullyEstablished = False self.connectedAt = 0 self.skipUntil = 0 if address is None and sock is not None: self.destination = state.Peer(sock.getpeername()[0], sock.getpeername()[1]) self.isOutbound = False TLSDispatcher.__init__(self, sock, server_side=True) self.connectedAt = time.time() logger.debug("Received connection from %s:%i", self.destination.host, self.destination.port) self.nodeid = randomBytes(8) elif address is not None and sock is not None: TLSDispatcher.__init__(self, sock, server_side=False) self.isOutbound = True logger.debug("Outbound proxy connection to %s:%i", self.destination.host, self.destination.port) else: self.destination = address self.isOutbound = True if ":" in address.host: self.create_socket(socket.AF_INET6, socket.SOCK_STREAM) else: self.create_socket(socket.AF_INET, socket.SOCK_STREAM) self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) TLSDispatcher.__init__(self, sock, server_side=False) self.connect(self.destination) logger.debug("Connecting to %s:%i", self.destination.host, self.destination.port) encodedAddr = protocol.encodeHost(self.destination.host) if protocol.checkIPAddress(encodedAddr, True) and not protocol.checkSocksIP(self.destination.host): self.local = True else: self.local = False #shared.connectedHostsList[self.destination] = 0 ObjectTracker.__init__(self) self.bm_proto_reset() self.set_state("bm_header", expectBytes=protocol.Header.size) def antiIntersectionDelay(self, initial = False): # estimated time for a small object to propagate across the whole network delay = math.ceil(math.log(max(len(knownnodes.knownNodes[x]) for x in knownnodes.knownNodes) + 2, 20)) * (0.2 + invQueue.queueCount/2.0) # take the stream with maximum amount of nodes # +2 is to avoid problems with log(0) and log(1) # 20 is avg connected nodes count # 0.2 is avg message transmission time if delay > 0: if initial: self.skipUntil = self.connectedAt + delay if self.skipUntil > time.time(): logger.debug("Initial skipping processing getdata for %.2fs", self.skipUntil - time.time()) else: logger.debug("Skipping processing getdata due to missing object for %.2fs", delay) self.skipUntil = time.time() + delay def state_connection_fully_established(self): self.set_connection_fully_established() self.set_state("bm_header") self.bm_proto_reset() return True def set_connection_fully_established(self): if not self.isOutbound and not self.local: shared.clientHasReceivedIncomingConnections = True UISignalQueue.put(('setStatusIcon', 'green')) UISignalQueue.put(('updateNetworkStatusTab', (self.isOutbound, True, self.destination))) self.antiIntersectionDelay(True) self.fullyEstablished = True if self.isOutbound: knownnodes.increaseRating(self.destination) if self.isOutbound: Dandelion().maybeAddStem(self) self.sendAddr() self.sendBigInv() def sendAddr(self): # We are going to share a maximum number of 1000 addrs (per overlapping # stream) with our peer. 500 from overlapping streams, 250 from the # left child stream, and 250 from the right child stream. maxAddrCount = BMConfigParser().safeGetInt("bitmessagesettings", "maxaddrperstreamsend", 500) # init addressCount = 0 payload = b'' templist = [] addrs = {} for stream in self.streams: with knownnodes.knownNodesLock: if len(knownnodes.knownNodes[stream]) > 0: filtered = {k: v for k, v in knownnodes.knownNodes[stream].items() if v["lastseen"] > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)} elemCount = len(filtered) if elemCount > maxAddrCount: elemCount = maxAddrCount # only if more recent than 3 hours addrs[stream] = helper_random.randomsample(filtered.items(), elemCount) # sent 250 only if the remote isn't interested in it if len(knownnodes.knownNodes[stream * 2]) > 0 and stream not in self.streams: filtered = {k: v for k, v in knownnodes.knownNodes[stream*2].items() if v["lastseen"] > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)} elemCount = len(filtered) if elemCount > maxAddrCount / 2: elemCount = int(maxAddrCount / 2) addrs[stream * 2] = helper_random.randomsample(filtered.items(), elemCount) if len(knownnodes.knownNodes[(stream * 2) + 1]) > 0 and stream not in self.streams: filtered = {k: v for k, v in knownnodes.knownNodes[stream*2+1].items() if v["lastseen"] > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)} elemCount = len(filtered) if elemCount > maxAddrCount / 2: elemCount = int(maxAddrCount / 2) addrs[stream * 2 + 1] = helper_random.randomsample(filtered.items(), elemCount) for substream in addrs.keys(): for peer, params in addrs[substream]: templist.append((substream, peer, params["lastseen"])) if len(templist) > 0: self.append_write_buf(BMProto.assembleAddr(templist)) def sendBigInv(self): def sendChunk(): if objectCount == 0: return logger.debug('Sending huge inv message with %i objects to just this one peer', objectCount) self.append_write_buf(protocol.CreatePacket('inv', addresses.encodeVarint(objectCount) + payload)) # Select all hashes for objects in this stream. bigInvList = {} for stream in self.streams: # may lock for a long time, but I think it's better than thousands of small locks with self.objectsNewToThemLock: for objHash in Inventory().unexpired_hashes_by_stream(stream): # don't advertise stem objects on bigInv if Dandelion().hasHash(objHash): continue bigInvList[objHash] = 0 #self.objectsNewToThem[objHash] = time.time() objectCount = 0 payload = b'' # Now let us start appending all of these hashes together. They will be # sent out in a big inv message to our new peer. for hash, storedValue in bigInvList.items(): payload += hash objectCount += 1 if objectCount >= BMProto.maxObjectCount: sendChunk() payload = b'' objectCount = 0 # flush sendChunk() def handle_connect(self): try: AdvancedDispatcher.handle_connect(self) except socket.error as e: if e.errno in asyncore._DISCONNECTED: logger.debug("%s:%i: Connection failed: %s" % (self.destination.host, self.destination.port, str(e))) return self.nodeid = randomBytes(8) self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \ network.connectionpool.BMConnectionPool().streams, False, nodeid=self.nodeid)) #print "%s:%i: Sending version" % (self.destination.host, self.destination.port) self.connectedAt = time.time() receiveDataQueue.put(self.destination) def handle_read(self): TLSDispatcher.handle_read(self) if self.isOutbound and self.fullyEstablished: for s in self.streams: try: with knownnodes.knownNodesLock: knownnodes.knownNodes[s][self.destination]["lastseen"] = time.time() except KeyError: pass receiveDataQueue.put(self.destination) def handle_write(self): TLSDispatcher.handle_write(self) def handle_close(self): if self.isOutbound and not self.fullyEstablished: knownnodes.decreaseRating(self.destination) if self.fullyEstablished: UISignalQueue.put(('updateNetworkStatusTab', (self.isOutbound, False, self.destination))) if self.isOutbound: Dandelion().maybeRemoveStem(self) BMProto.handle_close(self) class Socks5BMConnection(Socks5Connection, TCPConnection): def __init__(self, address): Socks5Connection.__init__(self, address=address) TCPConnection.__init__(self, address=address, sock=self.socket) self.set_state("init") def state_proxy_handshake_done(self): Socks5Connection.state_proxy_handshake_done(self) self.nodeid = randomBytes(8) self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \ network.connectionpool.BMConnectionPool().streams, False, nodeid=self.nodeid)) self.set_state("bm_header", expectBytes=protocol.Header.size) return True class Socks4aBMConnection(Socks4aConnection, TCPConnection): def __init__(self, address): Socks4aConnection.__init__(self, address=address) TCPConnection.__init__(self, address=address, sock=self.socket) self.set_state("init") def state_proxy_handshake_done(self): Socks4aConnection.state_proxy_handshake_done(self) self.nodeid = randomBytes(8) self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \ network.connectionpool.BMConnectionPool().streams, False, nodeid=self.nodeid)) self.set_state("bm_header", expectBytes=protocol.Header.size) return True class TCPServer(AdvancedDispatcher): def __init__(self, host='127.0.0.1', port=8444): if not hasattr(self, '_map'): AdvancedDispatcher.__init__(self) self.create_socket(socket.AF_INET, socket.SOCK_STREAM) self.set_reuse_addr() for attempt in range(50): try: if attempt > 0: port = random.randint(32767, 65535) self.bind((host, port)) except socket.error as e: if e.errno in (asyncore.EADDRINUSE, asyncore.WSAEADDRINUSE): continue else: if attempt > 0: BMConfigParser().set("bitmessagesettings", "port", str(port)) BMConfigParser().save() break self.destination = state.Peer(host, port) self.bound = True self.listen(5) def is_bound(self): try: return self.bound except AttributeError: return False def handle_accept(self): pair = self.accept() if pair is not None: sock, addr = pair state.ownAddresses[state.Peer(sock.getsockname()[0], sock.getsockname()[1])] = True if len(network.connectionpool.BMConnectionPool().inboundConnections) + \ len(network.connectionpool.BMConnectionPool().outboundConnections) > \ BMConfigParser().safeGetInt("bitmessagesettings", "maxtotalconnections") + \ BMConfigParser().safeGetInt("bitmessagesettings", "maxbootstrapconnections") + 10: # 10 is a sort of buffer, in between it will go through the version handshake # and return an error to the peer logger.warning("Server full, dropping connection") sock.close() return try: network.connectionpool.BMConnectionPool().addConnection(TCPConnection(sock=sock)) except socket.error: pass if __name__ == "__main__": # initial fill for host in (("127.0.0.1", 8448),): direct = TCPConnection(host) while len(asyncore.socket_map) > 0: print "loop, state = %s" % (direct.state) asyncore.loop(timeout=10, count=1) continue proxy = Socks5BMConnection(host) while len(asyncore.socket_map) > 0: # print "loop, state = %s" % (proxy.state) asyncore.loop(timeout=10, count=1) proxy = Socks4aBMConnection(host) while len(asyncore.socket_map) > 0: # print "loop, state = %s" % (proxy.state) asyncore.loop(timeout=10, count=1)