#!/usr/bin/python3

import socket

HOST = 'localhost'
PORT = 5000

IAC_WILL_BINARY = b'\xFF\xFB\x00'
IAC_WONT_BINARY = b'\xFF\xFC\x00'
IAC_DO_BINARY   = b'\xFF\xFD\x00'
IAC_DONT_BINARY = b'\xFF\xFE\x00'

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

server.bind((HOST, PORT))
server.listen(1)

client, address = server.accept()

client.sendall(IAC_DO_BINARY)
client.recv(1024) # Ignore client's response

while True:
    try:
        data = client.recv(1024)
        if not data:
            break
        print(data)
        client.send(data)
    except KeyboardInterrupt:
        break

client.close()
server.close()