sys/net/sl/if_slvar.h

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)if_slvar.h  8.3 (Berkeley) 2/1/94
  30  *
  31  * $FreeBSD: src/sys/net/if_slvar.h,v 1.16 1999/08/28 00:48:21 peter Exp $
  32  * $DragonFly: src/sys/net/sl/if_slvar.h,v 1.3 2004/09/16 04:49:32 dillon Exp $
  33  */
  34
  35 #ifndef _NET_IF_SLVAR_H_
  36 #define _NET_IF_SLVAR_H_
  37
  38 #include <sys/callout.h>
  39
  40 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  41
  42 /*
  43  * Definitions for SLIP interface data structures
  44  *
  45  * (This exists so programs like slstats can get at the definition
  46  *  of sl_softc.)
  47  */
  48 struct sl_softc {
  49         struct  ifnet sc_if;            /* network-visible interface */
  50         struct  ifqueue sc_fastq;       /* interactive output queue */
  51         struct  tty *sc_ttyp;           /* pointer to tty structure */
  52         u_char  *sc_mp;                 /* pointer to next available buf char */
  53         u_char  *sc_ep;                 /* pointer to last available buf char */
  54         u_char  *sc_buf;                /* input buffer */
  55         u_int   sc_flags;               /* see below */
  56         u_int   sc_escape;      /* =1 if last char input was FRAME_ESCAPE */
  57         long    sc_lasttime;            /* last time a char arrived */
  58         long    sc_abortcount;          /* number of abort escape chars */
  59         long    sc_starttime;           /* time of first abort in window */
  60         u_int   sc_keepalive;           /* time to decide link hang */
  61         u_int   sc_outfill;     /* time to send FRAME_END when output idle */
  62                                         /*
  63                                          * Handles for scheduling outfill and
  64                                          * keepalive timeouts.
  65                                          */
  66         struct  callout sc_oftimeout;
  67         struct  callout sc_katimeout;
  68         struct  slcompress sc_comp;     /* tcp compression data */
  69 };
  70
  71 #endif
  72
  73 /* internal flags */
  74 #define SC_ERROR        0x0001          /* had an input error */
  75 #define SC_OUTWAIT      0x0002          /* waiting for output fill */
  76 #define SC_KEEPALIVE    0x0004          /* input keepalive */
  77 #define SC_STATIC       0x0008          /* it is static unit */
  78
  79 /* visible flags */
  80 #define SC_COMPRESS     IFF_LINK0       /* compress TCP traffic */
  81 #define SC_NOICMP       IFF_LINK1       /* suppress ICMP traffic */
  82 #define SC_AUTOCOMP     IFF_LINK2       /* auto-enable TCP compression */
  83
  84 #endif