292 lines
16 KiB
Python
292 lines
16 KiB
Python
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 configparser import BMConfigParser
|
|
from helper_threading import *
|
|
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()
|
|
|
|
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:
|
|
shared.knownNodesLock.acquire()
|
|
peer = state.trustedPeer
|
|
shared.knownNodes[self.streamNumber][peer] = time.time()
|
|
shared.knownNodesLock.release()
|
|
else:
|
|
while not state.shutdown:
|
|
shared.knownNodesLock.acquire()
|
|
try:
|
|
peer, = random.sample(shared.knownNodes[self.streamNumber], 1)
|
|
except ValueError: # no known nodes
|
|
shared.knownNodesLock.release()
|
|
time.sleep(1)
|
|
continue
|
|
priority = (183600 - (time.time() - shared.knownNodes[self.streamNumber][peer])) / 183600 # 2 days and 3 hours
|
|
shared.knownNodesLock.release()
|
|
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
|
|
time.sleep(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 8 # maximum number of outgoing connections = 8
|
|
while len(self.selfInitiatedConnections[self.streamNumber]) >= maximumConnections:
|
|
self.stop.wait(10)
|
|
if state.shutdown:
|
|
break
|
|
random.seed()
|
|
peer = self._getPeer()
|
|
shared.alreadyAttemptedConnectionsListLock.acquire()
|
|
while peer in shared.alreadyAttemptedConnectionsList or peer.host in shared.connectedHostsList:
|
|
shared.alreadyAttemptedConnectionsListLock.release()
|
|
# print 'choosing new sample'
|
|
random.seed()
|
|
peer = self._getPeer()
|
|
self.stop.wait(1)
|
|
if state.shutdown:
|
|
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.
|
|
if (time.time() - shared.alreadyAttemptedConnectionsListResetTime) > 1800:
|
|
shared.alreadyAttemptedConnectionsList.clear()
|
|
shared.alreadyAttemptedConnectionsListResetTime = int(
|
|
time.time())
|
|
shared.alreadyAttemptedConnectionsListLock.acquire()
|
|
shared.alreadyAttemptedConnectionsList[peer] = 0
|
|
try:
|
|
shared.alreadyAttemptedConnectionsListLock.release()
|
|
except threading.ThreadError as e:
|
|
pass
|
|
if state.shutdown:
|
|
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.
|
|
"""
|
|
shared.knownNodesLock.acquire()
|
|
try:
|
|
del shared.knownNodes[self.streamNumber][peer]
|
|
except:
|
|
pass
|
|
shared.knownNodesLock.release()
|
|
logger.debug('deleting ' + str(peer) + ' from shared.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))
|
|
someObjectsOfWhichThisRemoteNodeIsAlreadyAware = {} # This is not necessairly a complete list; we clear it from time to time to save memory.
|
|
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,
|
|
someObjectsOfWhichThisRemoteNodeIsAlreadyAware)
|
|
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,
|
|
someObjectsOfWhichThisRemoteNodeIsAlreadyAware,
|
|
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))
|
|
shared.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 shared.knownNodesLock:
|
|
"""
|
|
It is remotely possible that peer is no longer in shared.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 shared.knownNodes. This is unlikely because of the
|
|
alreadyAttemptedConnectionsList but because we clear that list once
|
|
every half hour, it can happen.
|
|
"""
|
|
if peer in shared.knownNodes[self.streamNumber]:
|
|
timeLastSeen = shared.knownNodes[self.streamNumber][peer]
|
|
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.
|
|
del shared.knownNodes[self.streamNumber][peer]
|
|
deletedPeer = peer
|
|
if deletedPeer:
|
|
str ('deleting ' + str(peer) + ' from shared.knownNodes because it is more than 48 hours old and we could not connect to it.')
|
|
|
|
except socks.Socks5AuthError as err:
|
|
shared.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 shared.knownNodesLock:
|
|
"""
|
|
It is remotely possible that peer is no longer in shared.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 shared.knownNodes. This is unlikely because of the
|
|
alreadyAttemptedConnectionsList but because we clear that list once
|
|
every half hour, it can happen.
|
|
"""
|
|
if peer in shared.knownNodes[self.streamNumber]:
|
|
timeLastSeen = shared.knownNodes[self.streamNumber][peer]
|
|
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.
|
|
del shared.knownNodes[self.streamNumber][peer]
|
|
deletedPeer = peer
|
|
if deletedPeer:
|
|
logger.debug('deleting ' + str(peer) + ' from shared.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)
|