88 lines
3.9 KiB
Python
88 lines
3.9 KiB
Python
import threading
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import shared
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import socket
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from class_sendDataThread import *
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from class_receiveDataThread import *
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import helper_bootstrap
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# Only one singleListener thread will ever exist. It creates the
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# receiveDataThread and sendDataThread for each incoming connection. Note
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# that it cannot set the stream number because it is not known yet- the
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# other node will have to tell us its stream number in a version message.
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# If we don't care about their stream, we will close the connection
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# (within the recversion function of the recieveData thread)
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class singleListener(threading.Thread):
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def __init__(self):
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threading.Thread.__init__(self)
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def setup(self, selfInitiatedConnections):
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self.selfInitiatedConnections = selfInitiatedConnections
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def run(self):
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while shared.safeConfigGetBoolean('bitmessagesettings', 'dontconnect'):
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time.sleep(1)
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helper_bootstrap.dns()
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# We typically don't want to accept incoming connections if the user is using a
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# SOCKS proxy, unless they have configured otherwise. If they eventually select
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# proxy 'none' or configure SOCKS listening then this will start listening for
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# connections.
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while shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS' and not shared.config.getboolean('bitmessagesettings', 'sockslisten'):
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time.sleep(5)
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with shared.printLock:
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print 'Listening for incoming connections.'
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HOST = '' # Symbolic name meaning all available interfaces
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PORT = shared.config.getint('bitmessagesettings', 'port')
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# This option apparently avoids the TIME_WAIT state so that we can
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# rebind faster
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind((HOST, PORT))
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sock.listen(2)
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while True:
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# We typically don't want to accept incoming connections if the user is using a
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# SOCKS proxy, unless they have configured otherwise. If they eventually select
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# proxy 'none' or configure SOCKS listening then this will start listening for
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# connections.
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while shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS' and not shared.config.getboolean('bitmessagesettings', 'sockslisten'):
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time.sleep(10)
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while len(shared.connectedHostsList) > 220:
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with shared.printLock:
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print 'We are connected to too many people. Not accepting further incoming connections for ten seconds.'
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time.sleep(10)
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a, (HOST, PORT) = sock.accept()
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# The following code will, unfortunately, block an incoming
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# connection if someone else on the same LAN is already connected
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# because the two computers will share the same external IP. This
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# is here to prevent connection flooding.
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while HOST in shared.connectedHostsList:
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with shared.printLock:
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print 'We are already connected to', HOST + '. Ignoring connection.'
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a.close()
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a, (HOST, PORT) = sock.accept()
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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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a.settimeout(20)
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sd = sendDataThread()
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sd.setup(
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a, HOST, PORT, -1, 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(
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a, HOST, PORT, -1, someObjectsOfWhichThisRemoteNodeIsAlreadyAware, self.selfInitiatedConnections)
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rd.start()
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with shared.printLock:
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print self, 'connected to', HOST, 'during INCOMING request.'
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