03263156de
If this option is specified in keys.dat then Bitmessage will connect to the host specified there instead of connecting to the hosts in the list of known nodes. It will also stop listening for incoming connections and the timing attack mitigation will be disabled. The expected use case is for example where a user is running a daemon on a dedicated machine in their local network and they occasionally want to check for messages using a second instance of the client on their laptop. In that case it would be much faster to catch up with the messages by directly downloading from the dedicated machine over the LAN. There is no need to connect to multiple peers or to do the timing attack mitigation because the daemon is trusted. The host is specified as hostname:port. Eg, ‘192.168.1.8:8444’.
192 lines
9.9 KiB
Python
192 lines
9.9 KiB
Python
import threading
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import time
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import random
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import shared
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import socks
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import socket
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import sys
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import tr
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from class_sendDataThread import *
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from class_receiveDataThread import *
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# For each stream to which we connect, several outgoingSynSender threads
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# will exist and will collectively create 8 connections with peers.
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class outgoingSynSender(threading.Thread):
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def __init__(self):
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threading.Thread.__init__(self)
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def setup(self, streamNumber, selfInitiatedConnections):
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self.streamNumber = streamNumber
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self.selfInitiatedConnections = selfInitiatedConnections
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def _getPeer(self):
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# If the user has specified a trusted peer then we'll only
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# ever connect to that. Otherwise we'll pick a random one from
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# the known nodes
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shared.knownNodesLock.acquire()
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if shared.trustedPeer:
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peer = shared.trustedPeer
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shared.knownNodes[self.streamNumber][peer] = time.time()
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else:
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peer, = random.sample(shared.knownNodes[self.streamNumber], 1)
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shared.knownNodesLock.release()
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return peer
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def run(self):
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while shared.safeConfigGetBoolean('bitmessagesettings', 'dontconnect'):
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time.sleep(2)
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while shared.safeConfigGetBoolean('bitmessagesettings', 'sendoutgoingconnections'):
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maximumConnections = 1 if shared.trustedPeer else 8 # maximum number of outgoing connections = 8
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while len(self.selfInitiatedConnections[self.streamNumber]) >= maximumConnections:
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time.sleep(10)
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if shared.shutdown:
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break
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random.seed()
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peer = self._getPeer()
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shared.alreadyAttemptedConnectionsListLock.acquire()
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while peer in shared.alreadyAttemptedConnectionsList or peer.host in shared.connectedHostsList:
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shared.alreadyAttemptedConnectionsListLock.release()
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# print 'choosing new sample'
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random.seed()
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peer = self._getPeer()
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time.sleep(1)
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# Clear out the shared.alreadyAttemptedConnectionsList every half
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# hour so that this program will again attempt a connection
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# to any nodes, even ones it has already tried.
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if (time.time() - shared.alreadyAttemptedConnectionsListResetTime) > 1800:
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shared.alreadyAttemptedConnectionsList.clear()
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shared.alreadyAttemptedConnectionsListResetTime = int(
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time.time())
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shared.alreadyAttemptedConnectionsListLock.acquire()
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shared.alreadyAttemptedConnectionsList[peer] = 0
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shared.alreadyAttemptedConnectionsListLock.release()
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timeNodeLastSeen = shared.knownNodes[
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self.streamNumber][peer]
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sock = socks.socksocket(socket.AF_INET, socket.SOCK_STREAM)
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# This option apparently avoids the TIME_WAIT state so that we
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# can rebind faster
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.settimeout(20)
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if shared.config.get('bitmessagesettings', 'socksproxytype') == 'none' and shared.verbose >= 2:
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with shared.printLock:
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print 'Trying an outgoing connection to', peer
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# sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS4a':
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if shared.verbose >= 2:
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with shared.printLock:
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print '(Using SOCKS4a) Trying an outgoing connection to', peer
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proxytype = socks.PROXY_TYPE_SOCKS4
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sockshostname = shared.config.get(
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'bitmessagesettings', 'sockshostname')
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socksport = shared.config.getint(
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'bitmessagesettings', 'socksport')
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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.
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if shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
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socksusername = shared.config.get(
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'bitmessagesettings', 'socksusername')
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sockspassword = shared.config.get(
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'bitmessagesettings', 'sockspassword')
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
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else:
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns)
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elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
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if shared.verbose >= 2:
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with shared.printLock:
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print '(Using SOCKS5) Trying an outgoing connection to', peer
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proxytype = socks.PROXY_TYPE_SOCKS5
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sockshostname = shared.config.get(
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'bitmessagesettings', 'sockshostname')
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socksport = shared.config.getint(
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'bitmessagesettings', 'socksport')
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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.
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if shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
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socksusername = shared.config.get(
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'bitmessagesettings', 'socksusername')
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sockspassword = shared.config.get(
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'bitmessagesettings', 'sockspassword')
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
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else:
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns)
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try:
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sock.connect((peer.host, peer.port))
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rd = receiveDataThread()
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rd.daemon = True # close the main program even if there are threads left
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someObjectsOfWhichThisRemoteNodeIsAlreadyAware = {} # This is not necessairly a complete list; we clear it from time to time to save memory.
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sendDataThreadQueue = Queue.Queue() # Used to submit information to the send data thread for this connection.
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rd.setup(sock,
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peer.host,
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peer.port,
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self.streamNumber,
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someObjectsOfWhichThisRemoteNodeIsAlreadyAware,
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self.selfInitiatedConnections,
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sendDataThreadQueue)
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rd.start()
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with shared.printLock:
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print self, 'connected to', peer, 'during an outgoing attempt.'
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sd = sendDataThread(sendDataThreadQueue)
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sd.setup(sock, peer.host, peer.port, self.streamNumber,
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someObjectsOfWhichThisRemoteNodeIsAlreadyAware)
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sd.start()
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sd.sendVersionMessage()
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except socks.GeneralProxyError as err:
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if shared.verbose >= 2:
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with shared.printLock:
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print 'Could NOT connect to', peer, 'during outgoing attempt.', err
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timeLastSeen = shared.knownNodes[
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self.streamNumber][peer]
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if (int(time.time()) - timeLastSeen) > 172800 and len(shared.knownNodes[self.streamNumber]) > 1000: # for nodes older than 48 hours old if we have more than 1000 hosts in our list, delete from the shared.knownNodes data-structure.
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shared.knownNodesLock.acquire()
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del shared.knownNodes[self.streamNumber][peer]
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shared.knownNodesLock.release()
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with shared.printLock:
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print 'deleting ', peer, 'from shared.knownNodes because it is more than 48 hours old and we could not connect to it.'
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except socks.Socks5AuthError as err:
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shared.UISignalQueue.put((
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'updateStatusBar', tr.translateText(
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"MainWindow", "SOCKS5 Authentication problem: %1").arg(str(err))))
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except socks.Socks5Error as err:
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pass
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print 'SOCKS5 error. (It is possible that the server wants authentication).)', str(err)
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except socks.Socks4Error as err:
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print 'Socks4Error:', err
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except socket.error as err:
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if shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
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print 'Bitmessage MIGHT be having trouble connecting to the SOCKS server. ' + str(err)
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else:
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if shared.verbose >= 1:
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with shared.printLock:
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print 'Could NOT connect to', peer, 'during outgoing attempt.', err
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timeLastSeen = shared.knownNodes[
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self.streamNumber][peer]
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if (int(time.time()) - timeLastSeen) > 172800 and len(shared.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 data-structure.
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shared.knownNodesLock.acquire()
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del shared.knownNodes[self.streamNumber][peer]
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shared.knownNodesLock.release()
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with shared.printLock:
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print 'deleting ', peer, 'from knownNodes because it is more than 48 hours old and we could not connect to it.'
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except Exception as err:
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sys.stderr.write(
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'An exception has occurred in the outgoingSynSender thread that was not caught by other exception types: ')
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import traceback
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traceback.print_exc()
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time.sleep(0.1)
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