85 lines
3.5 KiB
C
85 lines
3.5 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_slvar.h 8.3 (Berkeley) 2/1/94
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*
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* $Id: if_slvar.h,v 1.14 1997/09/21 22:01:05 gibbs Exp $
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*/
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#ifndef _NET_IF_SLVAR_H_
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#define _NET_IF_SLVAR_H_
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#include <sys/callout.h>
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/*
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* Definitions for SLIP interface data structures
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*
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* (This exists so programs like slstats can get at the definition
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* of sl_softc.)
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*/
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struct sl_softc {
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struct ifnet sc_if; /* network-visible interface */
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struct ifqueue sc_fastq; /* interactive output queue */
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struct tty *sc_ttyp; /* pointer to tty structure */
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u_char *sc_mp; /* pointer to next available buf char */
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u_char *sc_ep; /* pointer to last available buf char */
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u_char *sc_buf; /* input buffer */
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u_int sc_flags; /* see below */
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u_int sc_escape; /* =1 if last char input was FRAME_ESCAPE */
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long sc_lasttime; /* last time a char arrived */
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long sc_abortcount; /* number of abort escape chars */
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long sc_starttime; /* time of first abort in window */
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u_int sc_keepalive; /* time to decide link hang */
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u_int sc_outfill; /* time to send FRAME_END when output idle */
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/*
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* Handles for scheduling outfill and
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* keepalive timeouts.
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*/
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struct callout_handle sc_ofhandle;
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struct callout_handle sc_kahandle;
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struct slcompress sc_comp; /* tcp compression data */
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};
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/* internal flags */
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#define SC_ERROR 0x0001 /* had an input error */
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#define SC_OUTWAIT 0x0002 /* waiting for output fill */
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#define SC_KEEPALIVE 0x0004 /* input keepalive */
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#define SC_STATIC 0x0008 /* it is static unit */
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/* visible flags */
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#define SC_COMPRESS IFF_LINK0 /* compress TCP traffic */
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#define SC_NOICMP IFF_LINK1 /* suppress ICMP traffic */
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#define SC_AUTOCOMP IFF_LINK2 /* auto-enable TCP compression */
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#endif
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