You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
PyBitmessage/src/class_outgoingSynSender.py

213 lines
11 KiB

import threading
import time
import random
import shared
import socks
import socket
import sys
import tr
from class_sendDataThread import *
from class_receiveDataThread import *
# For each stream to which we connect, several outgoingSynSender threads
# will exist and will collectively create 8 connections with peers.
class outgoingSynSender(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
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
shared.knownNodesLock.acquire()
if shared.trustedPeer:
peer = shared.trustedPeer
shared.knownNodes[self.streamNumber][peer] = time.time()
else:
peer, = random.sample(shared.knownNodes[self.streamNumber], 1)
shared.knownNodesLock.release()
return peer
def run(self):
while shared.safeConfigGetBoolean('bitmessagesettings', 'dontconnect'):
time.sleep(2)
while shared.safeConfigGetBoolean('bitmessagesettings', 'sendoutgoingconnections'):
maximumConnections = 1 if shared.trustedPeer else 8 # maximum number of outgoing connections = 8
while len(self.selfInitiatedConnections[self.streamNumber]) >= maximumConnections:
time.sleep(10)
if shared.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()
time.sleep(1)
# 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
shared.alreadyAttemptedConnectionsListLock.release()
timeNodeLastSeen = shared.knownNodes[
self.streamNumber][peer]
if peer.host.find(':') == -1:
address_family = socket.AF_INET
else:
address_family = socket.AF_INET6
try:
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()
del shared.knownNodes[self.streamNumber][peer]
shared.knownNodesLock.release()
with shared.printLock:
print 'deleting ', 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
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.settimeout(20)
if shared.config.get('bitmessagesettings', 'socksproxytype') == 'none' and shared.verbose >= 2:
with shared.printLock:
print 'Trying an outgoing connection to', peer
# sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS4a':
if shared.verbose >= 2:
with shared.printLock:
print '(Using SOCKS4a) Trying an outgoing connection to', peer
proxytype = socks.PROXY_TYPE_SOCKS4
sockshostname = shared.config.get(
'bitmessagesettings', 'sockshostname')
socksport = shared.config.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 shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = shared.config.get(
'bitmessagesettings', 'socksusername')
sockspassword = shared.config.get(
'bitmessagesettings', 'sockspassword')
sock.setproxy(
proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
sock.setproxy(
proxytype, sockshostname, socksport, rdns)
elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
if shared.verbose >= 2:
with shared.printLock:
print '(Using SOCKS5) Trying an outgoing connection to', peer
proxytype = socks.PROXY_TYPE_SOCKS5
sockshostname = shared.config.get(
'bitmessagesettings', 'sockshostname')
socksport = shared.config.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 shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = shared.config.get(
'bitmessagesettings', 'socksusername')
sockspassword = shared.config.get(
'bitmessagesettings', 'sockspassword')
sock.setproxy(
proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
sock.setproxy(
proxytype, sockshostname, socksport, rdns)
try:
sock.connect((peer.host, peer.port))
rd = receiveDataThread()
rd.daemon = True # close the main program even if there are threads left
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.
rd.setup(sock,
peer.host,
peer.port,
self.streamNumber,
someObjectsOfWhichThisRemoteNodeIsAlreadyAware,
self.selfInitiatedConnections,
sendDataThreadQueue)
rd.start()
with shared.printLock:
print self, 'connected to', peer, 'during an outgoing attempt.'
sd = sendDataThread(sendDataThreadQueue)
sd.setup(sock, peer.host, peer.port, self.streamNumber,
someObjectsOfWhichThisRemoteNodeIsAlreadyAware)
sd.start()
sd.sendVersionMessage()
except socks.GeneralProxyError as err:
if shared.verbose >= 2:
with shared.printLock:
print 'Could NOT connect to', peer, 'during outgoing attempt.', err
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.
shared.knownNodesLock.acquire()
del shared.knownNodes[self.streamNumber][peer]
shared.knownNodesLock.release()
with shared.printLock:
print 'deleting ', 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.translateText(
"MainWindow", "SOCKS5 Authentication problem: %1").arg(str(err))))
except socks.Socks5Error as err:
pass
print 'SOCKS5 error. (It is possible that the server wants authentication).)', str(err)
except socks.Socks4Error as err:
print 'Socks4Error:', err
except socket.error as err:
if shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
print 'Bitmessage MIGHT be having trouble connecting to the SOCKS server. ' + str(err)
else:
if shared.verbose >= 1:
with shared.printLock:
print 'Could NOT connect to', peer, 'during outgoing attempt.', err
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 knownNodes data-structure.
shared.knownNodesLock.acquire()
del shared.knownNodes[self.streamNumber][peer]
shared.knownNodesLock.release()
with shared.printLock:
print 'deleting ', peer, 'from knownNodes because it is more than 48 hours old and we could not connect to it.'
except Exception as err:
sys.stderr.write(
'An exception has occurred in the outgoingSynSender thread that was not caught by other exception types: ')
import traceback
traceback.print_exc()
time.sleep(0.1)