		UserLink network device driver

- WHAT IS

     This driver is based on BSD if_tun driver. If_tun driver
exchanges IP packets between the charactor device and the network
interface.


                                      +--------------+
                                      | user process |
                                      |network driver|
             +---------------+        |      ||      |
             | ethernet  h/w |        |  {char dev}  |
             +---------------+        +--------------+
                    ||                       ||
             +---------------+        +--------------+
             |[device driver]|        |  [userlink]  |
             +---------------+        +--------------+
                    ||                       ||
             +---------------+        +--------------+
             | net i/f(eth0) |        | net i/f(ul0) |
             +---------------+        +--------------+


- INSTALLATION

 # ./configure
 # make
 # make install
