usr/src/sys/net/if_slvar.h

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)if_slvar.h  7.7 (Berkeley) 5/7/91
 *
 * $Header: if_slvar.h,v 1.3 89/05/31 02:25:18 van Exp $
 */

/*
 * Definitions for SLIP interface data structures
 *
 * (This exists so programs like slstats can get at the definition
 *  of sl_softc.)
 */
struct sl_softc {
        struct  ifnet sc_if;            /* network-visible interface */
        struct  ifqueue sc_fastq;       /* interactive output queue */
        struct  tty *sc_ttyp;           /* pointer to tty structure */
        u_char  *sc_mp;                 /* pointer to next available buf char */
        u_char  *sc_ep;                 /* pointer to last available buf char */
        u_char  *sc_buf;                /* input buffer */
        u_int   sc_flags;               /* see below */
        u_int   sc_escape;      /* =1 if last char input was FRAME_ESCAPE */
        u_int   sc_bytessent;
        u_int   sc_bytesrcvd;
        long    sc_lasttime;            /* last time a char arrived */
        long    sc_starttime;           /* last time a char arrived */
        long    sc_abortcount;          /* number of abort esacpe chars */
#ifdef INET                             /* XXX */
        struct  slcompress sc_comp;     /* tcp compression data */
#endif
};

/* visible flags */
#define SC_COMPRESS     0x0002          /* compress TCP traffic */
#define SC_NOICMP       0x0004          /* supress ICMP traffic */
#define SC_AUTOCOMP     0x0008          /* auto-enable TCP compression */
/* internal flags (should be separate) */
#define SC_ABORT        0x10000         /* have been sent an abort request */

/* this stuff doesn't belong here... */
#define SLIOCGFLAGS     _IOR('t', 90, int)      /* get configuration flags */
#define SLIOCSFLAGS     _IOW('t', 89, int)      /* set configuration flags */
#define SLIOCGUNIT      _IOR('t', 88, int)      /* get slip unit number */