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#!/usr/bin/env python | |
import socket | |
import threading | |
import select | |
import sys | |
terminateAll = False | |
class ClientThread(threading.Thread): | |
def __init__(self, clientSocket, targetHost, targetPort): | |
threading.Thread.__init__(self) | |
self.__clientSocket = clientSocket | |
self.__targetHost = targetHost | |
self.__targetPort = targetPort | |
def run(self): | |
print "Client Thread started" | |
self.__clientSocket.setblocking(0) | |
targetHostSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
targetHostSocket.connect((self.__targetHost, self.__targetPort)) | |
targetHostSocket.setblocking(0) | |
clientData = "" | |
targetHostData = "" | |
terminate = False | |
while not terminate and not terminateAll: | |
inputs = [self.__clientSocket, targetHostSocket] | |
outputs = [] | |
if len(clientData) > 0: | |
outputs.append(self.__clientSocket) | |
if len(targetHostData) > 0: | |
outputs.append(targetHostSocket) | |
try: | |
inputsReady, outputsReady, errorsReady = select.select(inputs, outputs, [], 1.0) | |
except Exception, e: | |
print e | |
break | |
for inp in inputsReady: | |
if inp == self.__clientSocket: | |
try: | |
data = self.__clientSocket.recv(4096) | |
except Exception, e: | |
print e | |
if data != None: | |
if len(data) > 0: | |
targetHostData = data | |
else: | |
terminate = True | |
elif inp == targetHostSocket: | |
try: | |
data = targetHostSocket.recv(4096) | |
except Exception, e: | |
print e | |
if data != None: | |
if len(data) > 0: | |
clientData = data | |
else: | |
terminate = True | |
for out in outputsReady: | |
if out == self.__clientSocket and len(clientData) > 0: | |
bytesWritten = self.__clientSocket.send(clientData) | |
if bytesWritten > 0: | |
clientData = clientData[bytesWritten:] | |
elif out == targetHostSocket and len(targetHostData) > 0: | |
bytesWritten = targetHostSocket.send(targetHostData) | |
if bytesWritten > 0: | |
targetHostData = targetHostData[bytesWritten:] | |
self.__clientSocket.close() | |
targetHostSocket.close() | |
print "ClienThread terminating" | |
if __name__ == '__main__': | |
if len(sys.argv) != 5: | |
print 'Usage:\n\tpython SimpleTCPRedirector <host> <port> <remote host> <remote port>' | |
print 'Example:\n\tpython SimpleTCPRedirector localhost 8080 www.google.com 80' | |
sys.exit(0) | |
localHost = sys.argv[1] | |
localPort = int(sys.argv[2]) | |
targetHost = sys.argv[3] | |
targetPort = int(sys.argv[4]) | |
serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
serverSocket.bind((localHost, localPort)) | |
serverSocket.listen(5) | |
print "Waiting for client..." | |
while True: | |
try: | |
clientSocket, address = serverSocket.accept() | |
except KeyboardInterrupt: | |
print "\nTerminating..." | |
terminateAll = True | |
break | |
ClientThread(clientSocket, targetHost, targetPort).start() | |
serverSocket.close() |
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