+def option_callback(telnet_socket, command, option):
+ if option == b'\x7f':
+ # We use this unassigned option value as a canary, so short-circuit
+ # any response to avoid endlessly looping
+ pass
+ elif command in (telnetlib.DO, telnetlib.DONT):
+ telnet_socket.send(telnetlib.IAC + telnetlib.WONT + option)
+ elif command in (telnetlib.WILL, telnetlib.WONT):
+ telnet_socket.send(telnetlib.IAC + telnetlib.DONT + option)
+
+