294 lines
16 KiB
Python
294 lines
16 KiB
Python
import errno
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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 select
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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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from configparser import BMConfigParser
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from helper_threading import *
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import knownnodes
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import queues
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import state
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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, StoppableThread):
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def __init__(self):
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threading.Thread.__init__(self, name="outgoingSynSender")
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self.initStop()
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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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if state.trustedPeer:
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with knownnodes.knownNodesLock:
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peer = state.trustedPeer
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knownnodes.knownNodes[self.streamNumber][peer] = time.time()
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else:
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while not self._stopped:
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with knownnodes.knownNodesLock:
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try:
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peer, = random.sample(knownnodes.knownNodes[self.streamNumber], 1)
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except ValueError: # no known nodes
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self.stop.wait(1)
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continue
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priority = (183600 - (time.time() - knownnodes.knownNodes[self.streamNumber][peer])) / 183600 # 2 days and 3 hours
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if BMConfigParser().get('bitmessagesettings', 'socksproxytype') != 'none':
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if peer.host.find(".onion") == -1:
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priority /= 10 # hidden services have 10x priority over plain net
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else:
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# don't connect to self
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if peer.host == BMConfigParser().get('bitmessagesettings', 'onionhostname') and peer.port == BMConfigParser().getint("bitmessagesettings", "onionport"):
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continue
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elif peer.host.find(".onion") != -1: # onion address and so proxy
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continue
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if priority <= 0.001: # everyone has at least this much priority
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priority = 0.001
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if (random.random() <= priority):
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break
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self.stop.wait(0.01) # prevent CPU hogging if something is broken
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try:
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return peer
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except NameError:
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return state.Peer('127.0.0.1', 8444)
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def stopThread(self):
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super(outgoingSynSender, self).stopThread()
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try:
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self.sock.shutdown(socket.SHUT_RDWR)
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except:
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pass
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def run(self):
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while BMConfigParser().safeGetBoolean('bitmessagesettings', 'dontconnect') and not self._stopped:
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self.stop.wait(2)
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while BMConfigParser().safeGetBoolean('bitmessagesettings', 'sendoutgoingconnections') and not self._stopped:
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self.name = "outgoingSynSender"
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maximumConnections = 1 if state.trustedPeer else 8 # maximum number of outgoing connections = 8
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while len(self.selfInitiatedConnections[self.streamNumber]) >= maximumConnections and not self._stopped:
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self.stop.wait(10)
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if state.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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self.stop.wait(1)
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if self._stopped:
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break
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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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try:
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shared.alreadyAttemptedConnectionsListLock.release()
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except threading.ThreadError as e:
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pass
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if self._stopped:
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break
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self.name = "outgoingSynSender-" + peer.host.replace(":", ".") # log parser field separator
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address_family = socket.AF_INET
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# Proxy IP is IPv6. Unlikely but possible
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if BMConfigParser().get('bitmessagesettings', 'socksproxytype') != 'none':
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if ":" in BMConfigParser().get('bitmessagesettings', 'sockshostname'):
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address_family = socket.AF_INET6
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# No proxy, and destination is IPv6
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elif peer.host.find(':') >= 0 :
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address_family = socket.AF_INET6
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try:
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self.sock = socks.socksocket(address_family, socket.SOCK_STREAM)
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except:
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"""
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The line can fail on Windows systems which aren't
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64-bit compatiable:
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File "C:\Python27\lib\socket.py", line 187, in __init__
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_sock = _realsocket(family, type, proto)
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error: [Errno 10047] An address incompatible with the requested protocol was used
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So let us remove the offending address from our knownNodes file.
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"""
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with knownnodes.knownNodesLock:
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try:
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del knownnodes.knownNodes[self.streamNumber][peer]
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except:
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pass
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logger.debug('deleting ' + str(peer) + ' from knownnodes.knownNodes because it caused a socks.socksocket exception. We must not be 64-bit compatible.')
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continue
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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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self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self.sock.settimeout(20)
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if BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'none' and shared.verbose >= 2:
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logger.debug('Trying an outgoing connection to ' + str(peer))
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# sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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elif BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'SOCKS4a':
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if shared.verbose >= 2:
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logger.debug ('(Using SOCKS4a) Trying an outgoing connection to ' + str(peer))
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proxytype = socks.PROXY_TYPE_SOCKS4
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sockshostname = BMConfigParser().get(
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'bitmessagesettings', 'sockshostname')
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socksport = BMConfigParser().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 BMConfigParser().getboolean('bitmessagesettings', 'socksauthentication'):
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socksusername = BMConfigParser().get(
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'bitmessagesettings', 'socksusername')
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sockspassword = BMConfigParser().get(
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'bitmessagesettings', 'sockspassword')
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self.sock.setproxy(
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proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
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else:
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self.sock.setproxy(
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proxytype, sockshostname, socksport, rdns)
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elif BMConfigParser().get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
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if shared.verbose >= 2:
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logger.debug ('(Using SOCKS5) Trying an outgoing connection to ' + str(peer))
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proxytype = socks.PROXY_TYPE_SOCKS5
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sockshostname = BMConfigParser().get(
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'bitmessagesettings', 'sockshostname')
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socksport = BMConfigParser().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 BMConfigParser().getboolean('bitmessagesettings', 'socksauthentication'):
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socksusername = BMConfigParser().get(
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'bitmessagesettings', 'socksusername')
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sockspassword = BMConfigParser().get(
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'bitmessagesettings', 'sockspassword')
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self.sock.setproxy(
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proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
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else:
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self.sock.setproxy(
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proxytype, sockshostname, socksport, rdns)
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try:
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self.sock.connect((peer.host, peer.port))
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if self._stopped:
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self.sock.shutdown(socket.SHUT_RDWR)
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self.sock.close()
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return
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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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sd = sendDataThread(sendDataThreadQueue)
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sd.setup(self.sock, peer.host, peer.port, self.streamNumber,
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someObjectsOfWhichThisRemoteNodeIsAlreadyAware)
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sd.start()
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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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rd.setup(self.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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sd.objectHashHolderInstance)
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rd.start()
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sd.sendVersionMessage()
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logger.debug(str(self) + ' connected to ' + str(peer) + ' during an outgoing attempt.')
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except socks.GeneralProxyError as err:
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if err[0][0] in [7, 8, 9]:
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logger.error('Error communicating with proxy: %s', str(err))
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queues.UISignalQueue.put((
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'updateStatusBar',
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tr._translate(
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"MainWindow", "Problem communicating with proxy: %1. Please check your network settings.").arg(str(err[0][1]))
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))
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self.stop.wait(1)
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continue
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elif shared.verbose >= 2:
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logger.debug('Could NOT connect to ' + str(peer) + ' during outgoing attempt. ' + str(err))
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deletedPeer = None
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with knownnodes.knownNodesLock:
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"""
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It is remotely possible that peer is no longer in knownnodes.knownNodes.
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This could happen if two outgoingSynSender threads both try to
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connect to the same peer, both fail, and then both try to remove
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it from knownnodes.knownNodes. This is unlikely because of the
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alreadyAttemptedConnectionsList but because we clear that list once
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every half hour, it can happen.
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"""
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if peer in knownnodes.knownNodes[self.streamNumber]:
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timeLastSeen = knownnodes.knownNodes[self.streamNumber][peer]
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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.
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del knownnodes.knownNodes[self.streamNumber][peer]
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deletedPeer = peer
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if deletedPeer:
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str ('deleting ' + str(peer) + ' from knownnodes.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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queues.UISignalQueue.put((
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'updateStatusBar', tr._translate(
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"MainWindow", "SOCKS5 Authentication problem: %1. Please check your SOCKS5 settings.").arg(str(err))))
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except socks.Socks5Error as err:
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if err[0][0] in [3, 4, 5, 6]:
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# this is a more bening "error": host unreachable, network unreachable, connection refused, TTL expired
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logger.debug('SOCKS5 error: %s', str(err))
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else:
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logger.error('SOCKS5 error: %s', str(err))
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if err[0][0] == 4 or err[0][0] == 2:
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state.networkProtocolAvailability[protocol.networkType(peer.host)] = False
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except socks.Socks4Error as err:
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logger.error('Socks4Error: ' + str(err))
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except socket.error as err:
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if BMConfigParser().get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
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logger.error('Bitmessage MIGHT be having trouble connecting to the SOCKS server. ' + str(err))
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else:
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if err[0] == errno.ENETUNREACH:
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state.networkProtocolAvailability[protocol.networkType(peer.host)] = False
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if shared.verbose >= 1:
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logger.debug('Could NOT connect to ' + str(peer) + 'during outgoing attempt. ' + str(err))
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deletedPeer = None
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with knownnodes.knownNodesLock:
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"""
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It is remotely possible that peer is no longer in knownnodes.knownNodes.
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This could happen if two outgoingSynSender threads both try to
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connect to the same peer, both fail, and then both try to remove
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it from knownnodes.knownNodes. This is unlikely because of the
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alreadyAttemptedConnectionsList but because we clear that list once
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every half hour, it can happen.
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"""
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if peer in knownnodes.knownNodes[self.streamNumber]:
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timeLastSeen = knownnodes.knownNodes[self.streamNumber][peer]
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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.
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del knownnodes.knownNodes[self.streamNumber][peer]
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deletedPeer = peer
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if deletedPeer:
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logger.debug('deleting ' + str(peer) + ' from knownnodes.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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import traceback
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logger.exception('An exception has occurred in the outgoingSynSender thread that was not caught by other exception types:')
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self.stop.wait(0.1)
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