/*	 _________                                                  _____
 *    L	|         |                                                |     | R
 *    O	|         |    accept connection                           |     | E
 *    C	|         | <<---------------------------// . . . //----<< |     | M
 *    A	| LServer |                                                |     | O
 *    L	|         |    ???                                         |     | T
 *	|         | >>---------------------------// . . . //---->> |     | E
 *	|_________|                                                |_____|
 *	|         |    receive ctl data                            |     |
 *	|         | <<---------------------------// . . . //----<< |     |
 *	| RClient |                                                |     |
 *	|         |    send data                                   |     |
 *	|         | >>---------------------------// . . . //---->> |     |
 *	|_________|                                                |_____|
 *	|         |    receive data                                |     |
 *	|         | <<---------------------------// . . . //----<< |     |
 *      | LClient |                                                |     |
 *	|         |    connected / send ctl data                   |     |
 *	|         | >>---------------------------// . . . //---->> |     |
 *	|_________|                                                |_____|
 */
