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/*-
* 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
*
* $Id: if_slvar.h,v 1.13 1997/02/22 09:41:06 peter Exp $
*/
#ifndef _NET_IF_SLVAR_H_
#define _NET_IF_SLVAR_H_
#include <sys/callout.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 */
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 */
long sc_lasttime; /* last time a char arrived */
long sc_abortcount; /* number of abort escape chars */
long sc_starttime; /* time of first abort in window */
u_int sc_keepalive; /* time to decide link hang */
u_int sc_outfill; /* time to send FRAME_END when output idle */
/*
* Handles for scheduling outfill and
* keepalive timeouts.
*/
struct callout_handle sc_ofhandle;
struct callout_handle sc_kahandle;
#ifdef INET /* XXX */
struct slcompress sc_comp; /* tcp compression data */
#endif
};
/* internal flags */
#define SC_ERROR 0x0001 /* had an input error */
#define SC_OUTWAIT 0x0002 /* waiting for output fill */
#define SC_KEEPALIVE 0x0004 /* input keepalive */
#define SC_STATIC 0x0008 /* it is static unit */
/* visible flags */
#define SC_COMPRESS IFF_LINK0 /* compress TCP traffic */
#define SC_NOICMP IFF_LINK1 /* suppress ICMP traffic */
#define SC_AUTOCOMP IFF_LINK2 /* auto-enable TCP compression */
#endif
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