213 lines
11 KiB
Python
213 lines
11 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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if peer.host.find(':') == -1:
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address_family = socket.AF_INET
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else:
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address_family = socket.AF_INET6
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try:
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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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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 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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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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