itojun 1b6504a175 improve cnw driver, looking at bsdi/freebsd-pao cnw driver by wide+prb@bsdi.
- implement ioctls compatible with bsdi/freebsd-pao.  stat type is
  changed from u_int to u_quad_t to avoid overflows.  now it is possible
  to switch domain/encryption key from the userland, using cnwctl(8).
- implement multicast/promiscuous mode.  tested with IPv6.
1999-11-29 12:53:59 +00:00
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