1 /* @(#)if_slvar.h 7.4 (Berkeley) 01/20/90 */ 2 3 /* 4 * Definitions for SLIP interface data structures 5 * 6 * (this exists so programs like slstats can get at the definition 7 * of sl_softc.) 8 * 9 * $Header: if_slvar.h,v 1.3 89/05/31 02:25:18 van Exp $ 10 */ 11 struct sl_softc { 12 struct ifnet sc_if; /* network-visible interface */ 13 struct ifqueue sc_fastq; /* interactive output queue */ 14 struct tty *sc_ttyp; /* pointer to tty structure */ 15 u_char *sc_mp; /* pointer to next available buf char */ 16 u_char *sc_ep; /* pointer to last available buf char */ 17 u_char *sc_buf; /* input buffer */ 18 u_int sc_flags; /* see below */ 19 u_int sc_escape; /* =1 if last char input was FRAME_ESCAPE */ 20 u_int sc_bytessent; 21 u_int sc_bytesrcvd; 22 long sc_lasttime; /* last time a char arrived */ 23 long sc_starttime; /* last time a char arrived */ 24 long sc_abortcount; /* number of abort esacpe chars */ 25 #ifdef INET /* XXX */ 26 struct slcompress sc_comp; /* tcp compression data */ 27 #endif 28 }; 29 30 /* visible flags */ 31 #define SC_COMPRESS 0x0002 /* compress TCP traffic */ 32 #define SC_NOICMP 0x0004 /* supress ICMP traffic */ 33 #define SC_AUTOCOMP 0x0008 /* auto-enable TCP compression */ 34 /* internal flags (should be separate) */ 35 #define SC_ABORT 0x10000 /* have been sent an abort request */ 36 37 /* this stuff doesn't belong here... */ 38 #define SLIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */ 39 #define SLIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */ 40 #define SLIOGUNIT _IOW('t', 88, int) /* get slip unit number */ 41