Subversion Repositories SvarDOS

/*!\file net/if_slvar.h
 * SLIP interface structures.
 */

/*      $NetBSD: if_slvar.h,v 1.17 1997/03/27 20:36:17 thorpej Exp $    */

/*-
 * Copyright (c) 1991, 1993
 *      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  8.3 (Berkeley) 2/1/94
 */
#ifndef __NET_IF_SLVAR_H
#define __NET_IF_SLVAR_H

/*
 * 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 */
        int     sc_unit;                /* XXX unit number */
        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_char  *sc_xxx;                /* XXX don't ask... */
        u_int   sc_flags;               /* see below */
        u_int   sc_escape;      /* =1 if last char input was FRAME_ESCAPE */
        long    sc_lasttime;            /* last time a char arrived */
        long    sc_abortcount;          /* number of abort esacpe chars */
        long    sc_starttime;           /* time of first abort in window */
        long    sc_oqlen;               /* previous output queue size */
        long    sc_otimeout;            /* number of times output's stalled */
#ifdef NetBSD
        int     sc_oldbufsize;          /* previous output buffer size */
        int     sc_oldbufquot;          /* previous output buffer quoting */
#endif

#ifdef INET                             /* XXX */
        struct  slcompress sc_comp;     /* tcp compression data */
#endif

        caddr_t sc_bpf;                 /* BPF data */
};

/* internal flags */
#define SC_ERROR        0x0001          /* had an input error */

/* visible flags */
#define SC_COMPRESS     IFF_LINK0       /* compress TCP traffic */
#define SC_NOICMP       IFF_LINK1       /* supress ICMP traffic */
#define SC_AUTOCOMP     IFF_LINK2       /* auto-enable TCP compression */

#endif