cis-kuldeep/PyBitmessage-2021-04-27
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Remove obsolete files

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This commit is contained in:
Peter Šurda 2018-03-11 20:38:58 +01:00
parent 0da0c10995
commit 7938eab454
Signed by untrusted user: PeterSurda
GPG Key ID: 0C5F50C0B5F37D87
7 changed files with 0 additions and 1685 deletions
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54
src/class_objectHashHolder.py
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@ -1,54 +0,0 @@
# objectHashHolder is a timer-driven thread. One objectHashHolder thread is used
# by each sendDataThread. The sendDataThread uses it whenever it needs to
# advertise an object to peers in an inv message, or advertise a peer to other
# peers in an addr message. Instead of sending them out immediately, it must
# wait a random number of seconds for each connection so that different peers
# get different objects at different times. Thus an attacker who is
# connecting to many network nodes who receives a message first from Alice
# cannot be sure if Alice is the node who originated the message.
import random
import time
import threading
class objectHashHolder(threading.Thread):
size = 10
def __init__(self, sendDataThreadMailbox):
threading.Thread.__init__(self, name="objectHashHolder")
self.shutdown = False
self.sendDataThreadMailbox = sendDataThreadMailbox # This queue is used to submit data back to our associated sendDataThread.
self.collectionOfHashLists = []
self.collectionOfPeerLists = []
for i in range(objectHashHolder.size):
self.collectionOfHashLists.append([])
self.collectionOfPeerLists.append([])
def run(self):
iterator = 0
while not self.shutdown:
if len(self.collectionOfHashLists[iterator]) > 0:
self.sendDataThreadMailbox.put((0, 'sendinv', self.collectionOfHashLists[iterator]))
self.collectionOfHashLists[iterator] = []
if len(self.collectionOfPeerLists[iterator]) > 0:
self.sendDataThreadMailbox.put((0, 'sendaddr', self.collectionOfPeerLists[iterator]))
self.collectionOfPeerLists[iterator] = []
iterator += 1
iterator %= objectHashHolder.size
time.sleep(1)
def holdHash(self,hash):
self.collectionOfHashLists[random.randrange(0, objectHashHolder.size)].append(hash)
def hasHash(self, hash):
if hash in (hashlist for hashlist in self.collectionOfHashLists):
return True
return False
def holdPeer(self,peerDetails):
self.collectionOfPeerLists[random.randrange(0, objectHashHolder.size)].append(peerDetails)
def hashCount(self):
return sum([len(x) for x in self.collectionOfHashLists if type(x) is list])
def close(self):
self.shutdown = True

283
src/class_outgoingSynSender.py
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@ -1,283 +0,0 @@
import errno
import threading
import time
import random
import shared
import select
import socks
import socket
import sys
import tr
from class_sendDataThread import *
from class_receiveDataThread import *
from bmconfigparser import BMConfigParser
from helper_threading import *
import knownnodes
import queues
import state
# For each stream to which we connect, several outgoingSynSender threads
# will exist and will collectively create 8 connections with peers.
class outgoingSynSender(threading.Thread, StoppableThread):
def __init__(self):
threading.Thread.__init__(self, name="outgoingSynSender")
self.initStop()
random.seed()
def setup(self, streamNumber, selfInitiatedConnections):
self.streamNumber = streamNumber
self.selfInitiatedConnections = selfInitiatedConnections
def _getPeer(self):
# If the user has specified a trusted peer then we'll only
# ever connect to that. Otherwise we'll pick a random one from
# the known nodes
if state.trustedPeer:
with knownnodes.knownNodesLock:
peer = state.trustedPeer
knownnodes.knownNodes[self.streamNumber][peer] = time.time()
else:
while not self._stopped:
try:
with knownnodes.knownNodesLock:
peer, = random.sample(knownnodes.knownNodes[self.streamNumber], 1)
priority = (183600 - (time.time() - knownnodes.knownNodes[self.streamNumber][peer])) / 183600 # 2 days and 3 hours
except ValueError: # no known nodes
self.stop.wait(1)
continue
if BMConfigParser().get('bitmessagesettings', 'socksproxytype') != 'none':
if peer.host.find(".onion") == -1:
priority /= 10 # hidden services have 10x priority over plain net
else:
# don't connect to self
if peer.host == BMConfigParser().get('bitmessagesettings', 'onionhostname') and peer.port == BMConfigParser().getint("bitmessagesettings", "onionport"):
continue
elif peer.host.find(".onion") != -1: # onion address and so proxy
continue
if priority <= 0.001: # everyone has at least this much priority
priority = 0.001
if (random.random() <= priority):
break
self.stop.wait(0.01) # prevent CPU hogging if something is broken
try:
return peer
except NameError:
return state.Peer('127.0.0.1', 8444)
def stopThread(self):
super(outgoingSynSender, self).stopThread()
try:
self.sock.shutdown(socket.SHUT_RDWR)
except:
pass
def run(self):
while BMConfigParser().safeGetBoolean('bitmessagesettings', 'dontconnect') and not self._stopped:
self.stop.wait(2)
while BMConfigParser().safeGetBoolean('bitmessagesettings', 'sendoutgoingconnections') and not self._stopped:
self.name = "outgoingSynSender"
maximumConnections = 1 if state.trustedPeer else BMConfigParser().safeGetInt('bitmessagesettings', 'maxoutboundconnections')
while len(self.selfInitiatedConnections[self.streamNumber]) >= maximumConnections and not self._stopped:
self.stop.wait(10)
if state.shutdown:
break
peer = self._getPeer()
while peer in shared.alreadyAttemptedConnectionsList or peer.host in shared.connectedHostsList:
# print 'choosing new sample'
peer = self._getPeer()
self.stop.wait(1)
if self._stopped:
break
# Clear out the shared.alreadyAttemptedConnectionsList every half
# hour so that this program will again attempt a connection
# to any nodes, even ones it has already tried.
with shared.alreadyAttemptedConnectionsListLock:
if (time.time() - shared.alreadyAttemptedConnectionsListResetTime) > 1800:
shared.alreadyAttemptedConnectionsList.clear()
shared.alreadyAttemptedConnectionsListResetTime = int(
time.time())
shared.alreadyAttemptedConnectionsList[peer] = 0
if self._stopped:
break
self.name = "outgoingSynSender-" + peer.host.replace(":", ".") # log parser field separator
address_family = socket.AF_INET
# Proxy IP is IPv6. Unlikely but possible
if BMConfigParser().get('bitmessagesettings', 'socksproxytype') != 'none':
if ":" in BMConfigParser().get('bitmessagesettings', 'sockshostname'):
address_family = socket.AF_INET6
# No proxy, and destination is IPv6
elif peer.host.find(':') >= 0 :
address_family = socket.AF_INET6
try:
self.sock = socks.socksocket(address_family, socket.SOCK_STREAM)
except:
"""
The line can fail on Windows systems which aren't
64-bit compatiable:
File "C:\Python27\lib\socket.py", line 187, in __init__
_sock = _realsocket(family, type, proto)
error: [Errno 10047] An address incompatible with the requested protocol was used
So let us remove the offending address from our knownNodes file.
"""
with knownnodes.knownNodesLock:
try:
del knownnodes.knownNodes[self.streamNumber][peer]
except KeyError:
pass
logger.debug('deleting ' + str(peer) + ' from knownnodes.knownNodes because it caused a socks.socksocket exception. We must not be 64-bit compatible.')
continue
# This option apparently avoids the TIME_WAIT state so that we
# can rebind faster
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.sock.settimeout(20)
if BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'none' and shared.verbose >= 2:
logger.debug('Trying an outgoing connection to ' + str(peer))
# sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
elif BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'SOCKS4a':
if shared.verbose >= 2:
logger.debug ('(Using SOCKS4a) Trying an outgoing connection to ' + str(peer))
proxytype = socks.PROXY_TYPE_SOCKS4
sockshostname = BMConfigParser().get(
'bitmessagesettings', 'sockshostname')
socksport = BMConfigParser().getint(
'bitmessagesettings', 'socksport')
rdns = True # Do domain name lookups through the proxy; though this setting doesn't really matter since we won't be doing any domain name lookups anyway.
if BMConfigParser().getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = BMConfigParser().get(
'bitmessagesettings', 'socksusername')
sockspassword = BMConfigParser().get(
'bitmessagesettings', 'sockspassword')
self.sock.setproxy(
proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
self.sock.setproxy(
proxytype, sockshostname, socksport, rdns)
elif BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
if shared.verbose >= 2:
logger.debug ('(Using SOCKS5) Trying an outgoing connection to ' + str(peer))
proxytype = socks.PROXY_TYPE_SOCKS5
sockshostname = BMConfigParser().get(
'bitmessagesettings', 'sockshostname')
socksport = BMConfigParser().getint(
'bitmessagesettings', 'socksport')
rdns = True # Do domain name lookups through the proxy; though this setting doesn't really matter since we won't be doing any domain name lookups anyway.
if BMConfigParser().getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = BMConfigParser().get(
'bitmessagesettings', 'socksusername')
sockspassword = BMConfigParser().get(
'bitmessagesettings', 'sockspassword')
self.sock.setproxy(
proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
self.sock.setproxy(
proxytype, sockshostname, socksport, rdns)
try:
self.sock.connect((peer.host, peer.port))
if self._stopped:
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
return
sendDataThreadQueue = Queue.Queue() # Used to submit information to the send data thread for this connection.
sd = sendDataThread(sendDataThreadQueue)
sd.setup(self.sock, peer.host, peer.port, self.streamNumber)
sd.start()
rd = receiveDataThread()
rd.daemon = True # close the main program even if there are threads left
rd.setup(self.sock,
peer.host,
peer.port,
self.streamNumber,
self.selfInitiatedConnections,
sendDataThreadQueue,
sd.objectHashHolderInstance)
rd.start()
sd.sendVersionMessage()
logger.debug(str(self) + ' connected to ' + str(peer) + ' during an outgoing attempt.')
except socks.GeneralProxyError as err:
if err[0][0] in [7, 8, 9]:
logger.error('Error communicating with proxy: %s', str(err))
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow", "Problem communicating with proxy: %1. Please check your network settings.").arg(str(err[0][1]))
))
self.stop.wait(1)
continue
elif shared.verbose >= 2:
logger.debug('Could NOT connect to ' + str(peer) + ' during outgoing attempt. ' + str(err))
deletedPeer = None
with knownnodes.knownNodesLock:
"""
It is remotely possible that peer is no longer in knownnodes.knownNodes.
This could happen if two outgoingSynSender threads both try to
connect to the same peer, both fail, and then both try to remove
it from knownnodes.knownNodes. This is unlikely because of the
alreadyAttemptedConnectionsList but because we clear that list once
every half hour, it can happen.
"""
if peer in knownnodes.knownNodes[self.streamNumber]:
timeLastSeen = knownnodes.knownNodes[self.streamNumber][peer]
if (int(time.time()) - timeLastSeen) > 172800 and len(knownnodes.knownNodes[self.streamNumber]) > 1000: # for nodes older than 48 hours old if we have more than 1000 hosts in our list, delete from the knownnodes.knownNodes data-structure.
del knownnodes.knownNodes[self.streamNumber][peer]
deletedPeer = peer
if deletedPeer:
str ('deleting ' + str(peer) + ' from knownnodes.knownNodes because it is more than 48 hours old and we could not connect to it.')
except socks.Socks5AuthError as err:
queues.UISignalQueue.put((
'updateStatusBar', tr._translate(
"MainWindow", "SOCKS5 Authentication problem: %1. Please check your SOCKS5 settings.").arg(str(err))))
except socks.Socks5Error as err:
if err[0][0] in [3, 4, 5, 6]:
# this is a more bening "error": host unreachable, network unreachable, connection refused, TTL expired
logger.debug('SOCKS5 error: %s', str(err))
else:
logger.error('SOCKS5 error: %s', str(err))
if err[0][0] == 4 or err[0][0] == 2:
state.networkProtocolAvailability[protocol.networkType(peer.host)] = False
except socks.Socks4Error as err:
logger.error('Socks4Error: ' + str(err))
except socket.error as err:
if BMConfigParser().get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
logger.error('Bitmessage MIGHT be having trouble connecting to the SOCKS server. ' + str(err))
else:
if err[0] == errno.ENETUNREACH:
state.networkProtocolAvailability[protocol.networkType(peer.host)] = False
if shared.verbose >= 1:
logger.debug('Could NOT connect to ' + str(peer) + 'during outgoing attempt. ' + str(err))
deletedPeer = None
with knownnodes.knownNodesLock:
"""
It is remotely possible that peer is no longer in knownnodes.knownNodes.
This could happen if two outgoingSynSender threads both try to
connect to the same peer, both fail, and then both try to remove
it from knownnodes.knownNodes. This is unlikely because of the
alreadyAttemptedConnectionsList but because we clear that list once
every half hour, it can happen.
"""
if peer in knownnodes.knownNodes[self.streamNumber]:
timeLastSeen = knownnodes.knownNodes[self.streamNumber][peer]
if (int(time.time()) - timeLastSeen) > 172800 and len(knownnodes.knownNodes[self.streamNumber]) > 1000: # for nodes older than 48 hours old if we have more than 1000 hosts in our list, delete from the knownnodes.knownNodes data-structure.
del knownnodes.knownNodes[self.streamNumber][peer]
deletedPeer = peer
if deletedPeer:
logger.debug('deleting ' + str(peer) + ' from knownnodes.knownNodes because it is more than 48 hours old and we could not connect to it.')
except Exception as err:
import traceback
logger.exception('An exception has occurred in the outgoingSynSender thread that was not caught by other exception types:')
self.stop.wait(0.1)

879
src/class_receiveDataThread.py
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doTimingAttackMitigation = False
import base64
import datetime
import errno
import math
import time
import threading
import shared
import hashlib
import os
import Queue
import select
import socket
import random
import ssl
from struct import unpack, pack
import sys
import traceback
from binascii import hexlify
#import string
#from subprocess import call # used when the API must execute an outside program
#from pyelliptic.openssl import OpenSSL
#import highlevelcrypto
from addresses import *
from bmconfigparser import BMConfigParser
from class_objectHashHolder import objectHashHolder
from helper_generic import addDataPadding, isHostInPrivateIPRange
from helper_sql import sqlQuery
import knownnodes
from debug import logger
import paths
import protocol
from inventory import Inventory, PendingDownloadQueue, PendingUpload
import queues
import state
import throttle
import tr
from version import softwareVersion
# This thread is created either by the synSenderThread(for outgoing
# connections) or the singleListenerThread(for incoming connections).
class receiveDataThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self, name="receiveData")
self.data = ''
self.verackSent = False
self.verackReceived = False
def setup(
self,
sock,
HOST,
port,
streamNumber,
selfInitiatedConnections,
sendDataThreadQueue,
objectHashHolderInstance):
self.sock = sock
self.peer = state.Peer(HOST, port)
self.name = "receiveData-" + self.peer.host.replace(":", ".") # ":" log parser field separator
self.streamNumber = state.streamsInWhichIAmParticipating
self.remoteStreams = []
self.selfInitiatedConnections = selfInitiatedConnections
self.sendDataThreadQueue = sendDataThreadQueue # used to send commands and data to the sendDataThread
self.hostIdent = self.peer.port if ".onion" in BMConfigParser().get('bitmessagesettings', 'onionhostname') and protocol.checkSocksIP(self.peer.host) else self.peer.host
shared.connectedHostsList[
self.hostIdent] = 0 # The very fact that this receiveData thread exists shows that we are connected to the remote host. Let's add it to this list so that an outgoingSynSender thread doesn't try to connect to it.
self.connectionIsOrWasFullyEstablished = False # set to true after the remote node and I accept each other's version messages. This is needed to allow the user interface to accurately reflect the current number of connections.
self.services = 0
if streamNumber == -1: # This was an incoming connection. Send out a version message if we accept the other node's version message.
self.initiatedConnection = False
else:
self.initiatedConnection = True
for stream in self.streamNumber:
self.selfInitiatedConnections[stream][self] = 0
self.objectHashHolderInstance = objectHashHolderInstance
self.downloadQueue = PendingDownloadQueue()
self.startTime = time.time()
def run(self):
logger.debug('receiveDataThread starting. ID ' + str(id(self)) + '. The size of the shared.connectedHostsList is now ' + str(len(shared.connectedHostsList)))
while state.shutdown == 0:
dataLen = len(self.data)
try:
isSSL = False
if ((self.services & protocol.NODE_SSL == protocol.NODE_SSL) and
self.connectionIsOrWasFullyEstablished and
protocol.haveSSL(not self.initiatedConnection)):
isSSL = True
dataRecv = self.sslSock.recv(throttle.ReceiveThrottle().chunkSize)
else:
dataRecv = self.sock.recv(throttle.ReceiveThrottle().chunkSize)
self.data += dataRecv
throttle.ReceiveThrottle().wait(len(dataRecv))
except socket.timeout:
if self.connectionIsOrWasFullyEstablished:
self.sendping("Still around!")
continue
logger.error("Timeout during protocol initialisation")
break
except ssl.SSLError as err:
if err.errno == ssl.SSL_ERROR_WANT_READ:
select.select([self.sslSock], [], [], 10)
logger.debug('sock.recv retriable SSL error')
continue
if err.errno is None and 'timed out' in str(err):
if self.connectionIsOrWasFullyEstablished:
self.sendping("Still around!")
continue
logger.error ('SSL error: %i/%s', err.errno if err.errno else 0, str(err))
break
except socket.error as err:
if err.errno in (errno.EAGAIN, errno.EWOULDBLOCK) or \
(sys.platform.startswith('win') and \
err.errno == errno.WSAEWOULDBLOCK):
select.select([self.sslSock if isSSL else self.sock], [], [], 10)
logger.debug('sock.recv retriable error')
continue
logger.error('sock.recv error. Closing receiveData thread, %s', str(err))
break
# print 'Received', repr(self.data)
if len(self.data) == dataLen: # If self.sock.recv returned no data:
logger.debug('Connection to ' + str(self.peer) + ' closed. Closing receiveData thread')
break
else:
self.processData()
try:
for stream in self.streamNumber:
try:
del self.selfInitiatedConnections[stream][self]
except KeyError:
pass
logger.debug('removed self (a receiveDataThread) from selfInitiatedConnections')
except:
pass
self.sendDataThreadQueue.put((0, 'shutdown','no data')) # commands the corresponding sendDataThread to shut itself down.
try:
del shared.connectedHostsList[self.hostIdent]
except Exception as err:
logger.error('Could not delete ' + str(self.hostIdent) + ' from shared.connectedHostsList.' + str(err))
queues.UISignalQueue.put(('updateNetworkStatusTab', 'no data'))
self.checkTimeOffsetNotification()
logger.debug('receiveDataThread ending. ID ' + str(id(self)) + '. The size of the shared.connectedHostsList is now ' + str(len(shared.connectedHostsList)))
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 + objectHashHolder.size/2)
# 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
now = time.time()
if initial and now - delay < self.startTime:
logger.debug("Initial sleeping for %.2fs", delay - (now - self.startTime))
time.sleep(delay - (now - self.startTime))
elif not initial:
logger.debug("Sleeping due to missing object for %.2fs", delay)
time.sleep(delay)
def checkTimeOffsetNotification(self):
if shared.timeOffsetWrongCount >= 4 and not self.connectionIsOrWasFullyEstablished:
queues.UISignalQueue.put(('updateStatusBar', tr._translate("MainWindow", "The time on your computer, %1, may be wrong. Please verify your settings.").arg(datetime.datetime.now().strftime("%H:%M:%S"))))
def processData(self):
if len(self.data) < protocol.Header.size: # if so little of the data has arrived that we can't even read the checksum then wait for more data.
return
magic,command,payloadLength,checksum = protocol.Header.unpack(self.data[:protocol.Header.size])
if magic != 0xE9BEB4D9:
self.data = ""
return
if payloadLength > 1600100: # ~1.6 MB which is the maximum possible size of an inv message.
logger.info('The incoming message, which we have not yet download, is too large. Ignoring it. (unfortunately there is no way to tell the other node to stop sending it except to disconnect.) Message size: %s' % payloadLength)
self.data = self.data[payloadLength + protocol.Header.size:]
del magic,command,payloadLength,checksum # we don't need these anymore and better to clean them now before the recursive call rather than after
self.processData()
return
if len(self.data) < payloadLength + protocol.Header.size: # check if the whole message has arrived yet.
return
payload = self.data[protocol.Header.size:payloadLength + protocol.Header.size]
if checksum != hashlib.sha512(payload).digest()[0:4]: # test the checksum in the message.
logger.error('Checksum incorrect. Clearing this message.')
self.data = self.data[payloadLength + protocol.Header.size:]
del magic,command,payloadLength,checksum,payload # better to clean up before the recursive call
self.processData()
return
# The time we've last seen this node is obviously right now since we
# just received valid data from it. So update the knownNodes list so
# that other peers can be made aware of its existance.
if self.initiatedConnection and self.connectionIsOrWasFullyEstablished: # The remote port is only something we should share with others if it is the remote node's incoming port (rather than some random operating-system-assigned outgoing port).
with knownnodes.knownNodesLock:
for stream in self.streamNumber:
knownnodes.knownNodes[stream][self.peer] = int(time.time())
#Strip the nulls
command = command.rstrip('\x00')
logger.debug('remoteCommand ' + repr(command) + ' from ' + str(self.peer))
try:
#TODO: Use a dispatcher here
if command == 'error':
self.recerror(payload)
elif not self.connectionIsOrWasFullyEstablished:
if command == 'version':
self.recversion(payload)
elif command == 'verack':
self.recverack()
else:
if command == 'addr':
self.recaddr(payload)
elif command == 'inv':
self.recinv(payload)
elif command == 'getdata':
self.recgetdata(payload)
elif command == 'object':
self.recobject(payload)
elif command == 'ping':
self.sendpong(payload)
elif command == 'pong':
pass
else:
logger.info("Unknown command %s, ignoring", command)
except varintDecodeError as e:
logger.debug("There was a problem with a varint while processing a message from the wire. Some details: %s" % e)
except Exception as e:
logger.critical("Critical error in a receiveDataThread: \n%s" % traceback.format_exc())
del payload
self.data = self.data[payloadLength + protocol.Header.size:] # take this message out and then process the next message
if self.data == '': # if there are no more messages
toRequest = []
try:
for i in range(len(self.downloadQueue.pending), 100):
while True:
hashId = self.downloadQueue.get(False)
if not hashId in Inventory():
toRequest.append(hashId)
break
# don't track download for duplicates
self.downloadQueue.task_done(hashId)
except Queue.Empty:
pass
if len(toRequest) > 0:
self.sendgetdata(toRequest)
self.processData()
def sendpong(self, payload):
logger.debug('Sending pong')
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.CreatePacket('pong', payload)))
def sendping(self, payload):
logger.debug('Sending ping')
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.CreatePacket('ping', payload)))
def recverack(self):
logger.debug('verack received')
self.verackReceived = True
if self.verackSent:
# We have thus both sent and received a verack.
self.connectionFullyEstablished()
def sslHandshake(self):
self.sslSock = self.sock
if ((self.services & protocol.NODE_SSL == protocol.NODE_SSL) and
protocol.haveSSL(not self.initiatedConnection)):
logger.debug("Initialising TLS")
if sys.version_info >= (2,7,9):
context = ssl.SSLContext(protocol.sslProtocolVersion)
context.set_ciphers(protocol.sslProtocolCiphers)
context.set_ecdh_curve("secp256k1")
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
# also exclude TLSv1 and TLSv1.1 in the future
context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE | ssl.OP_CIPHER_SERVER_PREFERENCE
self.sslSock = context.wrap_socket(self.sock, server_side = not self.initiatedConnection, do_handshake_on_connect=False)
else:
self.sslSock = ssl.wrap_socket(self.sock, keyfile = os.path.join(paths.codePath(), 'sslkeys', 'key.pem'), certfile = os.path.join(paths.codePath(), 'sslkeys', 'cert.pem'), server_side = not self.initiatedConnection, ssl_version=protocol.sslProtocolVersion, do_handshake_on_connect=False, ciphers=protocol.sslProtocolCiphers)
self.sendDataThreadQueue.join()
while True:
try:
self.sslSock.do_handshake()
logger.debug("TLS handshake success")
if sys.version_info >= (2, 7, 9):
logger.debug("TLS protocol version: %s", self.sslSock.version())
break
except ssl.SSLError as e:
if sys.hexversion >= 0x02070900:
if isinstance (e, ssl.SSLWantReadError):
logger.debug("Waiting for SSL socket handhake read")
select.select([self.sslSock], [], [], 10)
continue
elif isinstance (e, ssl.SSLWantWriteError):
logger.debug("Waiting for SSL socket handhake write")
select.select([], [self.sslSock], [], 10)
continue
else:
if e.args[0] == ssl.SSL_ERROR_WANT_READ:
logger.debug("Waiting for SSL socket handhake read")
select.select([self.sslSock], [], [], 10)
continue
elif e.args[0] == ssl.SSL_ERROR_WANT_WRITE:
logger.debug("Waiting for SSL socket handhake write")
select.select([], [self.sslSock], [], 10)
continue
logger.error("SSL socket handhake failed: shutting down connection, %s", str(e))
self.sendDataThreadQueue.put((0, 'shutdown','tls handshake fail %s' % (str(e))))
return False
except socket.error as err:
logger.debug('SSL socket handshake failed, shutting down connection, %s', str(err))
self.sendDataThreadQueue.put((0, 'shutdown','tls handshake fail'))
return False
except Exception:
logger.error("SSL socket handhake failed, shutting down connection", exc_info=True)
self.sendDataThreadQueue.put((0, 'shutdown','tls handshake fail'))
return False
# SSL in the background should be blocking, otherwise the error handling is difficult
self.sslSock.settimeout(None)
return True
# no SSL
return True
def peerValidityChecks(self):
if self.remoteProtocolVersion < 3:
self.sendDataThreadQueue.put((0, 'sendRawData',protocol.assembleErrorMessage(
fatal=2, errorText="Your is using an old protocol. Closing connection.")))
logger.debug ('Closing connection to old protocol version ' + str(self.remoteProtocolVersion) + ' node: ' + str(self.peer))
return False
if self.timeOffset > 3600:
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleErrorMessage(
fatal=2, errorText="Your time is too far in the future compared to mine. Closing connection.")))
logger.info("%s's time is too far in the future (%s seconds). Closing connection to it.", self.peer, self.timeOffset)
shared.timeOffsetWrongCount += 1
time.sleep(2)
return False
elif self.timeOffset < -3600:
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleErrorMessage(
fatal=2, errorText="Your time is too far in the past compared to mine. Closing connection.")))
logger.info("%s's time is too far in the past (timeOffset %s seconds). Closing connection to it.", self.peer, self.timeOffset)
shared.timeOffsetWrongCount += 1
return False
else:
shared.timeOffsetWrongCount = 0
if len(self.streamNumber) == 0:
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleErrorMessage(
fatal=2, errorText="We don't have shared stream interests. Closing connection.")))
logger.debug ('Closed connection to ' + str(self.peer) + ' because there is no overlapping interest in streams.')
return False
return True
def connectionFullyEstablished(self):
if self.connectionIsOrWasFullyEstablished:
# there is no reason to run this function a second time
return
if not self.sslHandshake():
return
if self.peerValidityChecks() == False:
time.sleep(2)
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
self.checkTimeOffsetNotification()
return
self.connectionIsOrWasFullyEstablished = True
shared.timeOffsetWrongCount = 0
# Command the corresponding sendDataThread to set its own connectionIsOrWasFullyEstablished variable to True also
self.sendDataThreadQueue.put((0, 'connectionIsOrWasFullyEstablished', (self.services, self.sslSock)))
if not self.initiatedConnection:
shared.clientHasReceivedIncomingConnections = True
queues.UISignalQueue.put(('setStatusIcon', 'green'))
self.sock.settimeout(
600) # We'll send out a ping every 5 minutes to make sure the connection stays alive if there has been no other traffic to send lately.
queues.UISignalQueue.put(('updateNetworkStatusTab', 'no data'))
logger.debug('Connection fully established with ' + str(self.peer) + "\n" + \
'The size of the connectedHostsList is now ' + str(len(shared.connectedHostsList)) + "\n" + \
'The length of sendDataQueues is now: ' + str(len(state.sendDataQueues)) + "\n" + \
'broadcasting addr from within connectionFullyEstablished function.')
if self.initiatedConnection:
state.networkProtocolAvailability[protocol.networkType(self.peer.host)] = True
# we need to send our own objects to this node
PendingUpload().add()
# Let all of our peers know about this new node.
for stream in self.remoteStreams:
dataToSend = (int(time.time()), stream, self.services, self.peer.host, self.remoteNodeIncomingPort)
protocol.broadcastToSendDataQueues((
stream, 'advertisepeer', dataToSend))
self.sendaddr() # This is one large addr message to this one peer.
if len(shared.connectedHostsList) > \
BMConfigParser().safeGetInt("bitmessagesettings", "maxtotalconnections", 200):
logger.info ('We are connected to too many people. Closing connection.')
if self.initiatedConnection:
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleErrorMessage(fatal=2, errorText="Thank you for providing a listening node.")))
else:
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleErrorMessage(fatal=2, errorText="Server full, please try again later.")))
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
return
self.sendBigInv()
def sendBigInv(self):
# Select all hashes for objects in this stream.
bigInvList = {}
for stream in self.streamNumber:
for hash in Inventory().unexpired_hashes_by_stream(stream):
if not self.objectHashHolderInstance.hasHash(hash):
bigInvList[hash] = 0
numberOfObjectsInInvMessage = 0
payload = ''
# 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
numberOfObjectsInInvMessage += 1
if numberOfObjectsInInvMessage == 50000: # We can only send a max of 50000 items per inv message but we may have more objects to advertise. They must be split up into multiple inv messages.
self.sendinvMessageToJustThisOnePeer(
numberOfObjectsInInvMessage, payload)
payload = ''
numberOfObjectsInInvMessage = 0
if numberOfObjectsInInvMessage > 0:
self.sendinvMessageToJustThisOnePeer(
numberOfObjectsInInvMessage, payload)
# Used to send a big inv message when the connection with a node is
# first fully established. Notice that there is also a broadcastinv
# function for broadcasting invs to everyone in our stream.
def sendinvMessageToJustThisOnePeer(self, numberOfObjects, payload):
payload = encodeVarint(numberOfObjects) + payload
logger.debug('Sending huge inv message with ' + str(numberOfObjects) + ' objects to just this one peer')
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.CreatePacket('inv', payload)))
def _sleepForTimingAttackMitigation(self, sleepTime):
# We don't need to do the timing attack mitigation if we are
# only connected to the trusted peer because we can trust the
# peer not to attack
if sleepTime > 0 and doTimingAttackMitigation and state.trustedPeer == None:
logger.debug('Timing attack mitigation: Sleeping for ' + str(sleepTime) + ' seconds.')
time.sleep(sleepTime)
def recerror(self, data):
"""
The remote node has been polite enough to send you an error message.
"""
fatalStatus, readPosition = decodeVarint(data[:10])
banTime, banTimeLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += banTimeLength
inventoryVectorLength, inventoryVectorLengthLength = decodeVarint(data[readPosition:readPosition+10])
if inventoryVectorLength > 100:
return
readPosition += inventoryVectorLengthLength
inventoryVector = data[readPosition:readPosition+inventoryVectorLength]
readPosition += inventoryVectorLength
errorTextLength, errorTextLengthLength = decodeVarint(data[readPosition:readPosition+10])
if errorTextLength > 1000:
return
readPosition += errorTextLengthLength
errorText = data[readPosition:readPosition+errorTextLength]
if fatalStatus == 0:
fatalHumanFriendly = 'Warning'
elif fatalStatus == 1:
fatalHumanFriendly = 'Error'
elif fatalStatus == 2:
fatalHumanFriendly = 'Fatal'
message = '%s message received from %s: %s.' % (fatalHumanFriendly, self.peer, errorText)
if inventoryVector:
message += " This concerns object %s" % hexlify(inventoryVector)
if banTime > 0:
message += " Remote node says that the ban time is %s" % banTime
logger.error(message)
def recobject(self, data):
self.messageProcessingStartTime = time.time()
lengthOfTimeWeShouldUseToProcessThisMessage = shared.checkAndShareObjectWithPeers(data)
self.downloadQueue.task_done(calculateInventoryHash(data))
"""
Sleeping will help guarantee that we can process messages faster than a
remote node can send them. If we fall behind, the attacker could observe
that we are are slowing down the rate at which we request objects from the
network which would indicate that we own a particular address (whichever
one to which they are sending all of their attack messages). Note
that if an attacker connects to a target with many connections, this
mitigation mechanism might not be sufficient.
"""
sleepTime = lengthOfTimeWeShouldUseToProcessThisMessage - (time.time() - self.messageProcessingStartTime)
self._sleepForTimingAttackMitigation(sleepTime)
# We have received an inv message
def recinv(self, data):
numberOfItemsInInv, lengthOfVarint = decodeVarint(data[:10])
if numberOfItemsInInv > 50000:
sys.stderr.write('Too many items in inv message!')
return
if len(data) < lengthOfVarint + (numberOfItemsInInv * 32):
logger.info('inv message doesn\'t contain enough data. Ignoring.')
return
startTime = time.time()
advertisedSet = set()
for i in range(numberOfItemsInInv):
advertisedSet.add(data[lengthOfVarint + (32 * i):32 + lengthOfVarint + (32 * i)])
objectsNewToMe = advertisedSet
for stream in self.streamNumber:
objectsNewToMe -= Inventory().hashes_by_stream(stream)
logger.info('inv message lists %s objects. Of those %s are new to me. It took %s seconds to figure that out.', numberOfItemsInInv, len(objectsNewToMe), time.time()-startTime)
for item in random.sample(objectsNewToMe, len(objectsNewToMe)):
self.downloadQueue.put(item)
# Send a getdata message to our peer to request the object with the given
# hash
def sendgetdata(self, hashes):
if len(hashes) == 0:
return
logger.debug('sending getdata to retrieve %i objects', len(hashes))
payload = encodeVarint(len(hashes)) + ''.join(hashes)
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.CreatePacket('getdata', payload)), False)
# We have received a getdata request from our peer
def recgetdata(self, data):
numberOfRequestedInventoryItems, lengthOfVarint = decodeVarint(
data[:10])
if len(data) < lengthOfVarint + (32 * numberOfRequestedInventoryItems):
logger.debug('getdata message does not contain enough data. Ignoring.')
return
self.antiIntersectionDelay(True) # only handle getdata requests if we have been connected long enough
for i in xrange(numberOfRequestedInventoryItems):
hash = data[lengthOfVarint + (
i * 32):32 + lengthOfVarint + (i * 32)]
logger.debug('received getdata request for item:' + hexlify(hash))
if self.objectHashHolderInstance.hasHash(hash):
self.antiIntersectionDelay()
else:
if hash in Inventory():
self.sendObject(hash, Inventory()[hash].payload)
else:
self.antiIntersectionDelay()
logger.warning('%s asked for an object with a getdata which is not in either our memory inventory or our SQL inventory. We probably cleaned it out after advertising it but before they got around to asking for it.' % (self.peer,))
# Our peer has requested (in a getdata message) that we send an object.
def sendObject(self, hash, payload):
logger.debug('sending an object.')
self.sendDataThreadQueue.put((0, 'sendRawData', (hash, protocol.CreatePacket('object',payload))))
def _checkIPAddress(self, host):
if host[0:12] == '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
hostStandardFormat = socket.inet_ntop(socket.AF_INET, host[12:])
return self._checkIPv4Address(host[12:], hostStandardFormat)
elif host[0:6] == '\xfd\x87\xd8\x7e\xeb\x43':
# Onion, based on BMD/bitcoind
hostStandardFormat = base64.b32encode(host[6:]).lower() + ".onion"
return hostStandardFormat
else:
hostStandardFormat = socket.inet_ntop(socket.AF_INET6, host)
if hostStandardFormat == "":
# This can happen on Windows systems which are not 64-bit compatible
# so let us drop the IPv6 address.
return False
return self._checkIPv6Address(host, hostStandardFormat)
def _checkIPv4Address(self, host, hostStandardFormat):
if host[0] == '\x7F': # 127/8
logger.debug('Ignoring IP address in loopback range: ' + hostStandardFormat)
return False
if host[0] == '\x0A': # 10/8
logger.debug('Ignoring IP address in private range: ' + hostStandardFormat)
return False
if host[0:2] == '\xC0\xA8': # 192.168/16
logger.debug('Ignoring IP address in private range: ' + hostStandardFormat)
return False
if host[0:2] >= '\xAC\x10' and host[0:2] < '\xAC\x20': # 172.16/12
logger.debug('Ignoring IP address in private range:' + hostStandardFormat)
return False
return hostStandardFormat
def _checkIPv6Address(self, host, hostStandardFormat):
if host == ('\x00' * 15) + '\x01':
logger.debug('Ignoring loopback address: ' + hostStandardFormat)
return False
if host[0] == '\xFE' and (ord(host[1]) & 0xc0) == 0x80:
logger.debug ('Ignoring local address: ' + hostStandardFormat)
return False
if (ord(host[0]) & 0xfe) == 0xfc:
logger.debug ('Ignoring unique local address: ' + hostStandardFormat)
return False
return hostStandardFormat
# We have received an addr message.
def recaddr(self, data):
numberOfAddressesIncluded, lengthOfNumberOfAddresses = decodeVarint(
data[:10])
if shared.verbose >= 1:
logger.debug('addr message contains ' + str(numberOfAddressesIncluded) + ' IP addresses.')
if numberOfAddressesIncluded > 1000 or numberOfAddressesIncluded == 0:
return
if len(data) != lengthOfNumberOfAddresses + (38 * numberOfAddressesIncluded):
logger.debug('addr message does not contain the correct amount of data. Ignoring.')
return
for i in range(0, numberOfAddressesIncluded):
fullHost = data[20 + lengthOfNumberOfAddresses + (38 * i):36 + lengthOfNumberOfAddresses + (38 * i)]
recaddrStream, = unpack('>I', data[8 + lengthOfNumberOfAddresses + (
38 * i):12 + lengthOfNumberOfAddresses + (38 * i)])
if recaddrStream == 0:
continue
if recaddrStream not in self.streamNumber and (recaddrStream / 2) not in self.streamNumber: # if the embedded stream number and its parent are not in my streams then ignore it. Someone might be trying funny business.
continue
recaddrServices, = unpack('>Q', data[12 + lengthOfNumberOfAddresses + (
38 * i):20 + lengthOfNumberOfAddresses + (38 * i)])
recaddrPort, = unpack('>H', data[36 + lengthOfNumberOfAddresses + (
38 * i):38 + lengthOfNumberOfAddresses + (38 * i)])
hostStandardFormat = self._checkIPAddress(fullHost)
if hostStandardFormat is False:
continue
if recaddrPort == 0:
continue
timeSomeoneElseReceivedMessageFromThisNode, = unpack('>Q', data[lengthOfNumberOfAddresses + (
38 * i):8 + lengthOfNumberOfAddresses + (38 * i)]) # This is the 'time' value in the received addr message. 64-bit.
if recaddrStream not in knownnodes.knownNodes: # knownNodes is a dictionary of dictionaries with one outer dictionary for each stream. If the outer stream dictionary doesn't exist yet then we must make it.
with knownnodes.knownNodesLock:
knownnodes.knownNodes[recaddrStream] = {}
peerFromAddrMessage = state.Peer(hostStandardFormat, recaddrPort)
if peerFromAddrMessage not in knownnodes.knownNodes[recaddrStream]:
# only if recent
if timeSomeoneElseReceivedMessageFromThisNode > (int(time.time()) - 10800) and timeSomeoneElseReceivedMessageFromThisNode < (int(time.time()) + 10800):
# bootstrap provider?
if BMConfigParser().safeGetInt('bitmessagesettings', 'maxoutboundconnections') >= \
BMConfigParser().safeGetInt('bitmessagesettings', 'maxtotalconnections', 200):
knownnodes.trimKnownNodes(recaddrStream)
with knownnodes.knownNodesLock:
knownnodes.knownNodes[recaddrStream][peerFromAddrMessage] = int(time.time()) - 86400 # penalise initially by 1 day
logger.debug('added new node ' + str(peerFromAddrMessage) + ' to knownNodes in stream ' + str(recaddrStream))
shared.needToWriteKnownNodesToDisk = True
# normal mode
elif len(knownnodes.knownNodes[recaddrStream]) < 20000:
with knownnodes.knownNodesLock:
knownnodes.knownNodes[recaddrStream][peerFromAddrMessage] = timeSomeoneElseReceivedMessageFromThisNode
hostDetails = (
timeSomeoneElseReceivedMessageFromThisNode,
recaddrStream, recaddrServices, hostStandardFormat, recaddrPort)
protocol.broadcastToSendDataQueues((
recaddrStream, 'advertisepeer', hostDetails))
logger.debug('added new node ' + str(peerFromAddrMessage) + ' to knownNodes in stream ' + str(recaddrStream))
shared.needToWriteKnownNodesToDisk = True
# only update if normal mode
elif BMConfigParser().safeGetInt('bitmessagesettings', 'maxoutboundconnections') < \
BMConfigParser().safeGetInt('bitmessagesettings', 'maxtotalconnections', 200):
timeLastReceivedMessageFromThisNode = knownnodes.knownNodes[recaddrStream][
peerFromAddrMessage]
if (timeLastReceivedMessageFromThisNode < timeSomeoneElseReceivedMessageFromThisNode) and (timeSomeoneElseReceivedMessageFromThisNode < int(time.time())+900): # 900 seconds for wiggle-room in case other nodes' clocks aren't quite right.
with knownnodes.knownNodesLock:
knownnodes.knownNodes[recaddrStream][peerFromAddrMessage] = timeSomeoneElseReceivedMessageFromThisNode
for stream in self.streamNumber:
logger.debug('knownNodes currently has %i nodes for stream %i', len(knownnodes.knownNodes[stream]), stream)
# Send a huge addr message to our peer. This is only used
# when we fully establish a connection with a
# peer (with the full exchange of version and verack
# messages).
def sendaddr(self):
def sendChunk():
if numberOfAddressesInAddrMessage == 0:
return
self.sendDataThreadQueue.put((0, 'sendRawData', \
protocol.CreatePacket('addr', \
encodeVarint(numberOfAddressesInAddrMessage) + payload)))
# 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)
# protocol defines this as a maximum in one chunk
protocolAddrLimit = 1000
# init
numberOfAddressesInAddrMessage = 0
payload = ''
for stream in self.streamNumber:
addrsInMyStream = {}
addrsInChildStreamLeft = {}
addrsInChildStreamRight = {}
with knownnodes.knownNodesLock:
if len(knownnodes.knownNodes[stream]) > 0:
filtered = {k: v for k, v in knownnodes.knownNodes[stream].items()
if v > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)}
elemCount = len(filtered)
if elemCount > maxAddrCount:
elemCount = maxAddrCount
# only if more recent than 3 hours
addrsInMyStream = random.sample(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.streamNumber:
filtered = {k: v for k, v in knownnodes.knownNodes[stream*2].items()
if v > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)}
elemCount = len(filtered)
if elemCount > maxAddrCount / 2:
elemCount = int(maxAddrCount / 2)
addrsInChildStreamLeft = random.sample(filtered.items(), elemCount)
if len(knownnodes.knownNodes[(stream * 2) + 1]) > 0 and stream not in self.streamNumber:
filtered = {k: v for k, v in knownnodes.knownNodes[stream*2+1].items()
if v > (int(time.time()) - shared.maximumAgeOfNodesThatIAdvertiseToOthers)}
elemCount = len(filtered)
if elemCount > maxAddrCount / 2:
elemCount = int(maxAddrCount / 2)
addrsInChildStreamRight = random.sample(filtered.items(), elemCount)
for (HOST, PORT), timeLastReceivedMessageFromThisNode in addrsInMyStream:
numberOfAddressesInAddrMessage += 1
payload += pack(
'>Q', timeLastReceivedMessageFromThisNode) # 64-bit time
payload += pack('>I', stream)
payload += pack(
'>q', 1) # service bit flags offered by this node
payload += protocol.encodeHost(HOST)
payload += pack('>H', PORT) # remote port
if numberOfAddressesInAddrMessage >= protocolAddrLimit:
sendChunk()
payload = ''
numberOfAddressesInAddrMessage = 0
for (HOST, PORT), timeLastReceivedMessageFromThisNode in addrsInChildStreamLeft:
numberOfAddressesInAddrMessage += 1
payload += pack(
'>Q', timeLastReceivedMessageFromThisNode) # 64-bit time
payload += pack('>I', stream * 2)
payload += pack(
'>q', 1) # service bit flags offered by this node
payload += protocol.encodeHost(HOST)
payload += pack('>H', PORT) # remote port
if numberOfAddressesInAddrMessage >= protocolAddrLimit:
sendChunk()
payload = ''
numberOfAddressesInAddrMessage = 0
for (HOST, PORT), timeLastReceivedMessageFromThisNode in addrsInChildStreamRight:
numberOfAddressesInAddrMessage += 1
payload += pack(
'>Q', timeLastReceivedMessageFromThisNode) # 64-bit time
payload += pack('>I', (stream * 2) + 1)
payload += pack(
'>q', 1) # service bit flags offered by this node
payload += protocol.encodeHost(HOST)
payload += pack('>H', PORT) # remote port
if numberOfAddressesInAddrMessage >= protocolAddrLimit:
sendChunk()
payload = ''
numberOfAddressesInAddrMessage = 0
# flush
sendChunk()
# We have received a version message
def recversion(self, data):
if len(data) < 83:
# This version message is unreasonably short. Forget it.
return
if self.verackSent:
"""
We must have already processed the remote node's version message.
There might be a time in the future when we Do want to process
a new version message, like if the remote node wants to update
the streams in which they are interested. But for now we'll
ignore this version message
"""
return
self.remoteProtocolVersion, = unpack('>L', data[:4])
self.services, = unpack('>q', data[4:12])
timestamp, = unpack('>Q', data[12:20])
self.timeOffset = timestamp - int(time.time())
self.myExternalIP = socket.inet_ntoa(data[40:44])
# print 'myExternalIP', self.myExternalIP
self.remoteNodeIncomingPort, = unpack('>H', data[70:72])
# print 'remoteNodeIncomingPort', self.remoteNodeIncomingPort
useragentLength, lengthOfUseragentVarint = decodeVarint(
data[80:84])
readPosition = 80 + lengthOfUseragentVarint
self.userAgent = data[readPosition:readPosition + useragentLength]
# version check
try:
userAgentName, userAgentVersion = self.userAgent[1:-1].split(":", 2)
except:
userAgentName = self.userAgent
userAgentVersion = "0.0.0"
if userAgentName == "PyBitmessage":
myVersion = [int(n) for n in softwareVersion.split(".")]
try:
remoteVersion = [int(n) for n in userAgentVersion.split(".")]
except:
remoteVersion = 0
# remote is newer, but do not cross between stable and unstable
try:
if cmp(remoteVersion, myVersion) > 0 and \
(myVersion[1] % 2 == remoteVersion[1] % 2):
queues.UISignalQueue.put(('newVersionAvailable', remoteVersion))
except:
pass
readPosition += useragentLength
numberOfStreamsInVersionMessage, lengthOfNumberOfStreamsInVersionMessage = decodeVarint(
data[readPosition:])
readPosition += lengthOfNumberOfStreamsInVersionMessage
self.remoteStreams = []
for i in range(numberOfStreamsInVersionMessage):
newStreamNumber, lengthOfRemoteStreamNumber = decodeVarint(data[readPosition:])
readPosition += lengthOfRemoteStreamNumber
self.remoteStreams.append(newStreamNumber)
logger.debug('Remote node useragent: %s, streams: (%s), time offset: %is.',
self.userAgent, ', '.join(str(x) for x in self.remoteStreams), self.timeOffset)
# find shared streams
self.streamNumber = sorted(set(state.streamsInWhichIAmParticipating).intersection(self.remoteStreams))
shared.connectedHostsList[
self.hostIdent] = 1 # We use this data structure to not only keep track of what hosts we are connected to so that we don't try to connect to them again, but also to list the connections count on the Network Status tab.
self.sendDataThreadQueue.put((0, 'setStreamNumber', self.remoteStreams))
if data[72:80] == protocol.eightBytesOfRandomDataUsedToDetectConnectionsToSelf:
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
logger.debug('Closing connection to myself: ' + str(self.peer))
return
# The other peer's protocol version is of interest to the sendDataThread but we learn of it
# in this version message. Let us inform the sendDataThread.
self.sendDataThreadQueue.put((0, 'setRemoteProtocolVersion', self.remoteProtocolVersion))
if not isHostInPrivateIPRange(self.peer.host):
with knownnodes.knownNodesLock:
for stream in self.remoteStreams:
knownnodes.knownNodes[stream][state.Peer(self.peer.host, self.remoteNodeIncomingPort)] = int(time.time())
if not self.initiatedConnection:
# bootstrap provider?
if BMConfigParser().safeGetInt('bitmessagesettings', 'maxoutboundconnections') >= \
BMConfigParser().safeGetInt('bitmessagesettings', 'maxtotalconnections', 200):
knownnodes.knownNodes[stream][state.Peer(self.peer.host, self.remoteNodeIncomingPort)] -= 10800 # penalise inbound, 3 hours
else:
knownnodes.knownNodes[stream][state.Peer(self.peer.host, self.remoteNodeIncomingPort)] -= 7200 # penalise inbound, 2 hours
shared.needToWriteKnownNodesToDisk = True
self.sendverack()
if self.initiatedConnection == False:
self.sendversion()
# Sends a version message
def sendversion(self):
logger.debug('Sending version message')
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.assembleVersionMessage(
self.peer.host, self.peer.port, state.streamsInWhichIAmParticipating, not self.initiatedConnection)))
# Sends a verack message
def sendverack(self):
logger.debug('Sending verack')
self.sendDataThreadQueue.put((0, 'sendRawData', protocol.CreatePacket('verack')))
self.verackSent = True
if self.verackReceived:
self.connectionFullyEstablished()

216
src/class_sendDataThread.py
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@ -1,216 +0,0 @@
import errno
import time
import threading
import Queue
from struct import unpack, pack
import hashlib
import random
import select
import socket
from ssl import SSLError, SSL_ERROR_WANT_WRITE
import sys
from helper_generic import addDataPadding
from class_objectHashHolder import *
from addresses import *
from debug import logger
from inventory import PendingUpload
import protocol
import state
import throttle
# Every connection to a peer has a sendDataThread (and also a
# receiveDataThread).
class sendDataThread(threading.Thread):
def __init__(self, sendDataThreadQueue):
threading.Thread.__init__(self, name="sendData")
self.sendDataThreadQueue = sendDataThreadQueue
state.sendDataQueues.append(self.sendDataThreadQueue)
self.data = ''
self.objectHashHolderInstance = objectHashHolder(self.sendDataThreadQueue)
self.objectHashHolderInstance.daemon = True
self.objectHashHolderInstance.start()
self.connectionIsOrWasFullyEstablished = False
def setup(
self,
sock,
HOST,
PORT,
streamNumber
):
self.sock = sock
self.peer = state.Peer(HOST, PORT)
self.name = "sendData-" + self.peer.host.replace(":", ".") # log parser field separator
self.streamNumber = []
self.services = 0
self.buffer = ""
self.initiatedConnection = False
self.remoteProtocolVersion = - \
1 # This must be set using setRemoteProtocolVersion command which is sent through the self.sendDataThreadQueue queue.
self.lastTimeISentData = int(
time.time()) # If this value increases beyond five minutes ago, we'll send a pong message to keep the connection alive.
if streamNumber == -1: # This was an incoming connection.
self.initiatedConnection = False
else:
self.initiatedConnection = True
#logger.debug('The streamNumber of this sendDataThread (ID: ' + str(id(self)) + ') at setup() is' + str(self.streamNumber))
def sendVersionMessage(self):
datatosend = protocol.assembleVersionMessage(
self.peer.host, self.peer.port, state.streamsInWhichIAmParticipating, not self.initiatedConnection) # the IP and port of the remote host, and my streamNumber.
logger.debug('Sending version packet: ' + repr(datatosend))
try:
self.sendBytes(datatosend)
except Exception as err:
# if not 'Bad file descriptor' in err:
logger.error('sock.sendall error: %s\n' % err)
self.versionSent = 1
def sendBytes(self, data = ""):
self.buffer += data
if len(self.buffer) < throttle.SendThrottle().chunkSize and self.sendDataThreadQueue.qsize() > 1:
return True
while self.buffer and state.shutdown == 0:
isSSL = False
try:
if ((self.services & protocol.NODE_SSL == protocol.NODE_SSL) and
self.connectionIsOrWasFullyEstablished and
protocol.haveSSL(not self.initiatedConnection)):
isSSL = True
amountSent = self.sslSock.send(self.buffer[:throttle.SendThrottle().chunkSize])
else:
amountSent = self.sock.send(self.buffer[:throttle.SendThrottle().chunkSize])
except socket.timeout:
continue
except SSLError as e:
if e.errno == SSL_ERROR_WANT_WRITE:
select.select([], [self.sslSock], [], 10)
logger.debug('sock.recv retriable SSL error')
continue
logger.debug('Connection error (SSL)')
return False
except socket.error as e:
if e.errno in (errno.EAGAIN, errno.EWOULDBLOCK) or \
(sys.platform.startswith('win') and \
e.errno == errno.WSAEWOULDBLOCK):
select.select([], [self.sslSock if isSSL else self.sock], [], 10)
logger.debug('sock.recv retriable error')
continue
if e.errno in (errno.EPIPE, errno.ECONNRESET, errno.EHOSTUNREACH, errno.ETIMEDOUT, errno.ECONNREFUSED):
logger.debug('Connection error: %s', str(e))
return False
raise
throttle.SendThrottle().wait(amountSent)
self.lastTimeISentData = int(time.time())
self.buffer = self.buffer[amountSent:]
return True
def run(self):
logger.debug('sendDataThread starting. ID: ' + str(id(self)) + '. Number of queues in sendDataQueues: ' + str(len(state.sendDataQueues)))
while self.sendBytes():
deststream, command, data = self.sendDataThreadQueue.get()
if deststream == 0 or deststream in self.streamNumber:
if command == 'shutdown':
logger.debug('sendDataThread (associated with ' + str(self.peer) + ') ID: ' + str(id(self)) + ' shutting down now.')
break
# When you receive an incoming connection, a sendDataThread is
# created even though you don't yet know what stream number the
# remote peer is interested in. They will tell you in a version
# message and if you too are interested in that stream then you
# will continue on with the connection and will set the
# streamNumber of this send data thread here:
elif command == 'setStreamNumber':
self.streamNumber = data
logger.debug('setting the stream number to %s', ', '.join(str(x) for x in self.streamNumber))
elif command == 'setRemoteProtocolVersion':
specifiedRemoteProtocolVersion = data
logger.debug('setting the remote node\'s protocol version in the sendDataThread (ID: ' + str(id(self)) + ') to ' + str(specifiedRemoteProtocolVersion))
self.remoteProtocolVersion = specifiedRemoteProtocolVersion
elif command == 'advertisepeer':
self.objectHashHolderInstance.holdPeer(data)
elif command == 'sendaddr':
if self.connectionIsOrWasFullyEstablished: # only send addr messages if we have sent and heard a verack from the remote node
numberOfAddressesInAddrMessage = len(data)
payload = ''
for hostDetails in data:
timeLastReceivedMessageFromThisNode, streamNumber, services, host, port = hostDetails
payload += pack(
'>Q', timeLastReceivedMessageFromThisNode) # now uses 64-bit time
payload += pack('>I', streamNumber)
payload += pack(
'>q', services) # service bit flags offered by this node
payload += protocol.encodeHost(host)
payload += pack('>H', port)
payload = encodeVarint(numberOfAddressesInAddrMessage) + payload
packet = protocol.CreatePacket('addr', payload)
try:
self.sendBytes(packet)
except:
logger.error('sendaddr: self.sock.sendall failed')
break
elif command == 'advertiseobject':
self.objectHashHolderInstance.holdHash(data)
elif command == 'sendinv':
if self.connectionIsOrWasFullyEstablished: # only send inv messages if we have send and heard a verack from the remote node
payload = ''
for hash in data:
payload += hash
if payload != '':
payload = encodeVarint(len(payload)/32) + payload
packet = protocol.CreatePacket('inv', payload)
try:
self.sendBytes(packet)
except:
logger.error('sendinv: self.sock.sendall failed')
break
elif command == 'pong':
if self.lastTimeISentData < (int(time.time()) - 298):
# Send out a pong message to keep the connection alive.
logger.debug('Sending pong to ' + str(self.peer) + ' to keep connection alive.')
packet = protocol.CreatePacket('pong')
try:
self.sendBytes(packet)
except:
logger.error('send pong failed')
break
elif command == 'sendRawData':
objectHash = None
if type(data) in [list, tuple]:
objectHash, data = data
try:
self.sendBytes(data)
PendingUpload().delete(objectHash)
except:
logger.error('Sending of data to ' + str(self.peer) + ' failed. sendDataThread thread ' + str(self) + ' ending now.', exc_info=True)
break
elif command == 'connectionIsOrWasFullyEstablished':
self.connectionIsOrWasFullyEstablished = True
self.services, self.sslSock = data
elif self.connectionIsOrWasFullyEstablished:
logger.error('sendDataThread ID: ' + str(id(self)) + ' ignoring command ' + command + ' because the thread is not in stream ' + str(deststream) + ' but in streams ' + ', '.join(str(x) for x in self.streamNumber))
self.sendDataThreadQueue.task_done()
# Flush if the cycle ended with break
try:
self.sendDataThreadQueue.task_done()
except ValueError:
pass
try:
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
except:
pass
state.sendDataQueues.remove(self.sendDataThreadQueue)
PendingUpload().threadEnd()
logger.info('sendDataThread ending. ID: ' + str(id(self)) + '. Number of queues in sendDataQueues: ' + str(len(state.sendDataQueues)))
self.objectHashHolderInstance.close()

168
src/class_singleListener.py
View File

@ -1,168 +0,0 @@
import threading
import shared
import socket
from bmconfigparser import BMConfigParser
from class_sendDataThread import *
from class_receiveDataThread import *
import helper_bootstrap
from helper_threading import *
import protocol
import errno
import re
import state
# Only one singleListener thread will ever exist. It creates the
# receiveDataThread and sendDataThread for each incoming connection. Note
# that it cannot set the stream number because it is not known yet- the
# other node will have to tell us its stream number in a version message.
# If we don't care about their stream, we will close the connection
# (within the recversion function of the recieveData thread)
class singleListener(threading.Thread, StoppableThread):
def __init__(self):
threading.Thread.__init__(self, name="singleListener")
self.initStop()
def setup(self, selfInitiatedConnections):
self.selfInitiatedConnections = selfInitiatedConnections
def _createListenSocket(self, family):
HOST = '' # Symbolic name meaning all available interfaces
# If not sockslisten, but onionhostname defined, only listen on localhost
if not BMConfigParser().safeGetBoolean('bitmessagesettings', 'sockslisten') and ".onion" in BMConfigParser().get('bitmessagesettings', 'onionhostname'):
if family == socket.AF_INET6 and "." in BMConfigParser().get('bitmessagesettings', 'onionbindip'):
raise socket.error(errno.EINVAL, "Invalid mix of IPv4 and IPv6")
elif family == socket.AF_INET and ":" in BMConfigParser().get('bitmessagesettings', 'onionbindip'):
raise socket.error(errno.EINVAL, "Invalid mix of IPv4 and IPv6")
HOST = BMConfigParser().get('bitmessagesettings', 'onionbindip')
PORT = BMConfigParser().getint('bitmessagesettings', 'port')
sock = socket.socket(family, socket.SOCK_STREAM)
if family == socket.AF_INET6:
# Make sure we can accept both IPv4 and IPv6 connections.
# This is the default on everything apart from Windows
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
# This option apparently avoids the TIME_WAIT state so that we can
# rebind faster
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind((HOST, PORT))
sock.listen(2)
return sock
def stopThread(self):
super(singleListener, self).stopThread()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
for ip in ('127.0.0.1', BMConfigParser().get('bitmessagesettings', 'onionbindip')):
try:
s.connect((ip, BMConfigParser().getint('bitmessagesettings', 'port')))
s.shutdown(socket.SHUT_RDWR)
s.close()
break
except:
pass
def run(self):
# If there is a trusted peer then we don't want to accept
# incoming connections so we'll just abandon the thread
if state.trustedPeer:
return
while BMConfigParser().safeGetBoolean('bitmessagesettings', 'dontconnect') and state.shutdown == 0:
self.stop.wait(1)
helper_bootstrap.dns()
# We typically don't want to accept incoming connections if the user is using a
# SOCKS proxy, unless they have configured otherwise. If they eventually select
# proxy 'none' or configure SOCKS listening then this will start listening for
# connections. But if on SOCKS and have an onionhostname, listen
# (socket is then only opened for localhost)
while BMConfigParser().get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS' and \
(not BMConfigParser().getboolean('bitmessagesettings', 'sockslisten') and \
".onion" not in BMConfigParser().get('bitmessagesettings', 'onionhostname')) and \
state.shutdown == 0:
self.stop.wait(5)
logger.info('Listening for incoming connections.')
# First try listening on an IPv6 socket. This should also be
# able to accept connections on IPv4. If that's not available
# we'll fall back to IPv4-only.
try:
sock = self._createListenSocket(socket.AF_INET6)
except socket.error as e:
if (isinstance(e.args, tuple) and
e.args[0] in (errno.EAFNOSUPPORT,
errno.EPFNOSUPPORT,
errno.EADDRNOTAVAIL,
errno.ENOPROTOOPT,
errno.EINVAL)):
sock = self._createListenSocket(socket.AF_INET)
else:
raise
# regexp to match an IPv4-mapped IPv6 address
mappedAddressRegexp = re.compile(r'^::ffff:([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)$')
while state.shutdown == 0:
# We typically don't want to accept incoming connections if the user is using a
# SOCKS proxy, unless they have configured otherwise. If they eventually select
# proxy 'none' or configure SOCKS listening then this will start listening for
# connections.
while BMConfigParser().get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS' and not BMConfigParser().getboolean('bitmessagesettings', 'sockslisten') and ".onion" not in BMConfigParser().get('bitmessagesettings', 'onionhostname') and state.shutdown == 0:
self.stop.wait(10)
while len(shared.connectedHostsList) > \
BMConfigParser().safeGetInt("bitmessagesettings", "maxtotalconnections", 200) + \
BMConfigParser().safeGetInt("bitmessagesettings", "maxbootstrapconnections", 20) \
and state.shutdown == 0:
logger.info('We are connected to too many people. Not accepting further incoming connections for ten seconds.')
self.stop.wait(10)
while state.shutdown == 0:
try:
socketObject, sockaddr = sock.accept()
except socket.error as e:
if isinstance(e.args, tuple) and \
e.args[0] in (errno.EINTR,):
continue
time.wait(1)
continue
(HOST, PORT) = sockaddr[0:2]
# If the address is an IPv4-mapped IPv6 address then
# convert it to just the IPv4 representation
md = mappedAddressRegexp.match(HOST)
if md != None:
HOST = md.group(1)
# The following code will, unfortunately, block an
# incoming connection if someone else on the same LAN
# is already connected because the two computers will
# share the same external IP. This is here to prevent
# connection flooding.
# permit repeated connections from Tor
if HOST in shared.connectedHostsList and \
(".onion" not in BMConfigParser().get('bitmessagesettings', 'onionhostname') or not protocol.checkSocksIP(HOST)):
socketObject.close()
logger.info('We are already connected to ' + str(HOST) + '. Ignoring connection.')
else:
break
sendDataThreadQueue = Queue.Queue() # Used to submit information to the send data thread for this connection.
socketObject.settimeout(20)
sd = sendDataThread(sendDataThreadQueue)
sd.setup(
socketObject, HOST, PORT, -1)
sd.start()
rd = receiveDataThread()
rd.daemon = True # close the main program even if there are threads left
rd.setup(
socketObject, HOST, PORT, -1, self.selfInitiatedConnections, sendDataThreadQueue, sd.objectHashHolderInstance)
rd.start()
logger.info('connected to ' + HOST + ' during INCOMING request.')

81
src/throttle.py
View File

@ -1,81 +0,0 @@
import math
import threading
import time
from bmconfigparser import BMConfigParser
from singleton import Singleton
import state
class Throttle(object):
minChunkSize = 4096
maxChunkSize = 131072
def __init__(self, limit=0):
self.limit = limit
self.speed = 0
self.chunkSize = Throttle.maxChunkSize
self.txTime = int(time.time())
self.txLen = 0
self.total = 0
self.timer = threading.Event()
self.lock = threading.RLock()
self.resetChunkSize()
def recalculate(self):
with self.lock:
now = int(time.time())
if now > self.txTime:
self.speed = self.txLen / (now - self.txTime)
self.txLen -= self.limit * (now - self.txTime)
self.txTime = now
if self.txLen < 0 or self.limit == 0:
self.txLen = 0
def wait(self, dataLen):
with self.lock:
self.txLen += dataLen
self.total += dataLen
while state.shutdown == 0:
self.recalculate()
if self.limit == 0:
break
if self.txLen < self.limit:
break
self.timer.wait(0.2)
def getSpeed(self):
self.recalculate()
return self.speed
def resetChunkSize(self):
with self.lock:
# power of two smaller or equal to speed limit
try:
self.chunkSize = int(math.pow(2, int(math.log(self.limit,2))))
except ValueError:
self.chunkSize = Throttle.maxChunkSize
# range check
if self.chunkSize < Throttle.minChunkSize:
self.chunkSize = Throttle.minChunkSize
elif self.chunkSize > Throttle.maxChunkSize:
self.chunkSize = Throttle.maxChunkSize
@Singleton
class SendThrottle(Throttle):
def __init__(self):
Throttle.__init__(self, BMConfigParser().safeGetInt('bitmessagesettings', 'maxuploadrate')*1024)
def resetLimit(self):
with self.lock:
self.limit = BMConfigParser().safeGetInt('bitmessagesettings', 'maxuploadrate')*1024
Throttle.resetChunkSize(self)
@Singleton
class ReceiveThrottle(Throttle):
def __init__(self):
Throttle.__init__(self, BMConfigParser().safeGetInt('bitmessagesettings', 'maxdownloadrate')*1024)
def resetLimit(self):
with self.lock:
self.limit = BMConfigParser().safeGetInt('bitmessagesettings', 'maxdownloadrate')*1024
Throttle.resetChunkSize(self)

4
src/translations/bitmessage.pro
View File

@ -1,12 +1,8 @@
SOURCES = ../addresses.py\
../bitmessagemain.py\
../class_addressGenerator.py\
../class_outgoingSynSender.py\
../class_objectProcessor.py\
../class_receiveDataThread.py\
../class_sendDataThread.py\
../class_singleCleaner.py\
../class_singleListener.py\
../class_singleWorker.py\
../class_sqlThread.py\
../helper_bitcoin.py\