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POPython Simple TCP relay
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copied!<p>I'm trying to build a simple TCP relay that accepts multiple client connection.</p> <pre><code>Client1 --> TCPrelay1 --> RealServer1 --> TCPrelay1 --> Client1 Client2 --> TCPrelay1 --> RealServer1 --> TCPrelay1 --> Client2 Client3 --> TCPrelay1 --> RealServer1 --> TCPrelay1 --> Client3 </code></pre> <p>Something in that matter. No limit really on how many clients</p> <hr> <p>I found a UDP relay script <a href="https://github.com/EtiennePerot/misc-scripts/blob/master/udp-relay.py" rel="nofollow">here</a>.</p> <p>I tried to modify it to TCP. I'm really new to python sockets. So what could be wrong with my code? Nothing is happening. And its not relaying.</p> <pre><code>#SOCK_STREAM --TCP localPort = 5000 remotePort = 5000 #SV remoteHost = "xxxxx" try: localPort = int(localPort) except: fail('Invalid port number: ' + str(localPort)) try: remotePort = int(remotePort) except: fail('Invalid port number: ' + str(remotePort)) try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(('', localPort)) s.listen(1) except: fail('Failed to bind on port ' + str(localPort)) knownClient = None while True: conn, addr = s.accept() conn2, addr2 = s.connect((remoteHost, remotePort)) data = connection.recv(1024) if knownClient is None: knownClient = addr if addr == knownClient: s.sendall(data) print "Sent : " + ":".join("{0:X}".format(ord(c)) for c in data) else: s.sendall(data) print "Received : " + ":".join("{0:X}".format(ord(c)) for c in data) </code></pre> <hr> <p>[disregard]<br> Did a few research and found this logic at another SO question:</p> <pre><code>import select def fromAtoB(A, B): r, w = select.select([A], [B], []) if not r: select.select([A], [], []) elif not w: select.select([], [B], []) B.sendall(A.recv(4096)) </code></pre> <p>But I'm still trying to understand how to implement it.</p>

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