1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)if_slvar.h 8.2 (Berkeley) 01/07/94 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 long sc_lasttime; /* last time a char arrived */ 28 long sc_abortcount; /* number of abort esacpe chars */ 29 long sc_starttime; /* time of first abort in window */ 30 #ifdef INET /* XXX */ 31 struct slcompress sc_comp; /* tcp compression data */ 32 #endif 33 caddr_t sc_bpf; /* BPF data */ 34 }; 35 36 /* internal flags */ 37 #define SC_ERROR 0x0001 /* had an input error */ 38 39 /* visible flags */ 40 #define SC_COMPRESS IFF_LINK0 /* compress TCP traffic */ 41 #define SC_NOICMP IFF_LINK1 /* supress ICMP traffic */ 42 #define SC_AUTOCOMP IFF_LINK2 /* auto-enable TCP compression */ 43 44 /* this stuff doesn't belong here... */ 45 #define SLIOCGUNIT _IOR('t', 88, int) /* get slip unit number */ 46 47 /* 48 * definitions of the pseudo- link-level header attached to slip 49 * packets grabbed by the packet filter (bpf) traffic monitor. 50 * These definitions pulled from BPF's "slip.h" by cgd. 51 */ 52 #define SLIP_HDRLEN 16 /* BPF SLIP header length */ 53 54 /* offsets into BPF SLIP header */ 55 #define SLX_DIR 0 /* direction; see below */ 56 #define SLX_CHDR 1 /* compressed header data */ 57 #define CHDR_LEN 15 /* length of compressed header data */ 58 59 #define SLIPDIR_IN 0 /* incoming */ 60 #define SLIPDIR_OUT 1 /* outgoing */ 61 62 #ifdef KERNEL 63 void slattach __P((void)); 64 void slclose __P((struct tty *)); 65 void slinput __P((int, struct tty *)); 66 int slioctl __P((struct ifnet *, int, caddr_t)); 67 int slopen __P((dev_t, struct tty *)); 68 int sloutput __P((struct ifnet *, 69 struct mbuf *, struct sockaddr *, struct rtentry *)); 70 void slstart __P((struct tty *)); 71 int sltioctl __P((struct tty *, int, caddr_t, int)); 72 #endif /* KERNEL */ 73