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 85