sys/net/slip.h

   1 /*      $NetBSD: slip.h,v 1.8 2003/08/07 16:32:59 agc Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)slip.h      8.1 (Berkeley) 2/12/94
  32  */
  33
  34 #ifndef _NET_SLIP_H_
  35 #define _NET_SLIP_H_
  36
  37 /* Ioctls operating on SLIP ttys. */
  38 #define SLIOCGUNIT      _IOR('t', 88, int)      /* get slip unit number */
  39
  40 /*
  41  * Definitions of the pseudo-link-level header attached to slip
  42  * packets grabbed by the packet filter (bpf) traffic monitor.
  43  */
  44 #define SLIP_HDRLEN     16              /* BPF SLIP header length */
  45
  46 /* Offsets into BPF SLIP header. */
  47 #define SLX_DIR         0               /* direction; see below */
  48 #define SLX_CHDR        1               /* compressed header data */
  49 #define CHDR_LEN        15              /* length of compressed header data */
  50
  51 #define SLIPDIR_IN      0               /* incoming */
  52 #define SLIPDIR_OUT     1               /* outgoing */
  53
  54 #endif /* !_NET_SLIP_H_ */