1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)if_slvar.h 7.8 (Berkeley) 10/16/91 8 * 9 * $Header: if_slvar.h,v 1.3 89/05/31 02:25:18 van Exp $ 10 */ 11 12 /* 13 * Definitions for SLIP interface data structures 14 * 15 * (This exists so programs like slstats can get at the definition 16 * of sl_softc.) 17 */ 18 struct sl_softc { 19 struct ifnet sc_if; /* network-visible interface */ 20 struct ifqueue sc_fastq; /* interactive output queue */ 21 struct tty *sc_ttyp; /* pointer to tty structure */ 22 u_char *sc_mp; /* pointer to next available buf char */ 23 u_char *sc_ep; /* pointer to last available buf char */ 24 u_char *sc_buf; /* input buffer */ 25 u_int sc_flags; /* see below */ 26 u_int sc_escape; /* =1 if last char input was FRAME_ESCAPE */ 27 u_int sc_bytessent; 28 u_int sc_bytesrcvd; 29 long sc_lasttime; /* last time a char arrived */ 30 long sc_starttime; /* last time a char arrived */ 31 long sc_abortcount; /* number of abort esacpe chars */ 32 #ifdef INET /* XXX */ 33 struct slcompress sc_comp; /* tcp compression data */ 34 #endif 35 }; 36 37 /* visible flags */ 38 #define SC_COMPRESS IFF_LLC0 /* compress TCP traffic */ 39 #define SC_NOICMP IFF_LLC1 /* supress ICMP traffic */ 40 #define SC_AUTOCOMP IFF_LLC2 /* auto-enable TCP compression */ 41 /* internal flags (should be separate) */ 42 #define SC_ABORT 0x10000 /* have been sent an abort request */ 43 44 /* this stuff doesn't belong here... */ 45 #define SLIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */ 46 #define SLIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */ 47 #define SLIOCGUNIT _IOR('t', 88, int) /* get slip unit number */ 48