[unix-history] / sys / net / if_ppp.h

/*
 * if_ppp.h - Point-to-Point Protocol definitions.
 *
 * Copyright (c) 1989 Carnegie Mellon University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Carnegie Mellon University.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Modified by Paul Mackerras (paulus@cs.anu.edu.au)
 * Added PPP_MRU, sc_outm, sc_fastq, sc_bpf.
 *
 *	$Id: if_ppp.h,v 1.2 1993/08/31 05:40:38 rgrimes Exp $
 *	From: if_ppp.h,v 1.4 1993/08/29 11:22:37 paulus Exp $
 */

#ifndef _NET_IF_PPP_H_
#define _NET_IF_PPP_H_ 1

/*
 * Standard PPP header.
 */
struct ppp_header {
	u_char	ph_address;	/* Address Field */
	u_char	ph_control;	/* Control Field */
	u_short	ph_protocol;	/* Protocol Field */
};

#define PPP_HEADER_LEN	4	/* octets, must == sizeof(struct ppp_header) */
#define PPP_FCS_LEN	2	/* octets for FCS */

#define	PPP_ALLSTATIONS	0xff	/* All-Stations broadcast address */
#define	PPP_UI		0x03	/* Unnumbered Information */
#define	PPP_FLAG	0x7e	/* Flag Sequence */
#define	PPP_ESCAPE	0x7d	/* Asynchronous Control Escape */
#define	PPP_TRANS	0x20	/* Asynchronous transparency modifier */

/*
 * Protocol types.
 */
#define PPP_IP		0x21	/* Internet Protocol */
#define	PPP_XNS		0x25	/* Xerox NS */
#define	PPP_VJC_COMP	0x2d	/* VJ compressed TCP */
#define	PPP_VJC_UNCOMP	0x2f	/* VJ uncompressed TCP */
#define PPP_LCP		0xc021	/* Link Control Protocol */

/*
 * Important FCS values.
 */
#define PPP_INITFCS	0xffff	/* Initial FCS value */
#define PPP_GOODFCS	0xf0b8	/* Good final FCS value */
#define PPP_FCS(fcs, c)	(((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])

#define	PPP_MTU		1500	/* Default MTU (size of Info field) */
#define PPP_MRU		1500	/* Default MRU (max receive unit) */
#define PPP_MAXMRU	65000	/* Largest MRU we allow */
#define	PPP_HIWAT	400	/* Don't start a new packet if HIWAT on que */

struct ppp_softc {
	struct ifnet sc_if;	/* network-visible interface */
	u_int	sc_flags;	/* see below */
	struct	tty *sc_ttyp;	/* pointer to tty structure */
	struct	mbuf *sc_outm;	/* mbuf chain being output currently */
	struct	mbuf *sc_m;	/* pointer to input mbuf chain */
	struct	mbuf *sc_mc;	/* pointer to current input mbuf */
	char	*sc_mp;		/* pointer to next char in input mbuf */
	short	sc_ilen;	/* length of input-packet-so-far */
	u_short	sc_fcs;		/* FCS so far (input) */
	u_short	sc_outfcs;	/* FCS so far for output packet */
	short	sc_mru;		/* max receive unit */
	u_long	sc_asyncmap;	/* async control character map */
	u_long	sc_rasyncmap;	/* receive async control char map */
	struct	ifqueue sc_inq;	/* TTY side input queue */
	struct	ifqueue sc_fastq; /* IP interactive output packet queue */
#ifdef	VJC
	struct	slcompress sc_comp; /* vjc control buffer */
#endif
	u_int	sc_bytessent;
	u_int	sc_bytesrcvd;
	caddr_t	sc_bpf;
};

/* flags */
#define SC_COMP_PROT	0x00000001	/* protocol compression (output) */
#define SC_COMP_AC	0x00000002	/* header compression (output) */
#define	SC_COMP_TCP	0x00000004	/* TCP (VJ) compression (output) */
#define SC_NO_TCP_CCID	0x00000008	/* disable VJ connection-id comp. */
#define SC_REJ_COMP_AC	0x00000010	/* reject adrs/ctrl comp. on input */
#define SC_REJ_COMP_TCP	0x00000020	/* reject TCP (VJ) comp. on input */
#define	SC_MASK		0x0000ffff	/* bits that user can change */

/* state bits */
#define	SC_ESCAPED	0x00010000	/* saw a PPP_ESCAPE */
#define	SC_FLUSH	0x00020000	/* flush input until next PPP_FLAG */

#define t_sc T_LINEP

/* this stuff doesn't belong here... */
#define	PPPIOCGFLAGS	_IOR('t', 90, int)	/* get configuration flags */
#define	PPPIOCSFLAGS	_IOW('t', 89, int)	/* set configuration flags */
#define	PPPIOCGASYNCMAP	_IOR('t', 88, int)	/* get async map */
#define	PPPIOCSASYNCMAP	_IOW('t', 87, int)	/* set async map */
#define	PPPIOCGUNIT	_IOR('t', 86, int)	/* get ppp unit number */
#define	PPPIOCGRASYNCMAP _IOR('t', 85, int)	/* get receive async map */
#define	PPPIOCSRASYNCMAP _IOW('t', 84, int)	/* set receive async map */
#define	PPPIOCGMRU	_IOR('t', 83, int)	/* get max receive unit */
#define	PPPIOCSMRU	_IOW('t', 82, int)	/* set max receive unit */

/* old copies of PPP may have defined this */
#if !defined(ifr_mtu)
#define ifr_mtu	ifr_metric
#endif

#endif /* _NET_IF_PPP_H_ */
Commit	Line	Data
8b3438a6 RG	1	/*
	2	* if_ppp.h - Point-to-Point Protocol definitions.
	3	*
	4	* Copyright (c) 1989 Carnegie Mellon University.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms are permitted
	8	* provided that the above copyright notice and this paragraph are
	9	* duplicated in all such forms and that any documentation,
	10	* advertising materials, and other materials related to such
	11	* distribution and use acknowledge that the software was developed
	12	* by Carnegie Mellon University. The name of the
	13	* University may not be used to endorse or promote products derived
	14	* from this software without specific prior written permission.
	15	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	16	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	17	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* Modified by Paul Mackerras (paulus@cs.anu.edu.au)
2875cbc6	20	* Added PPP_MRU, sc_outm, sc_fastq, sc_bpf.
8b3438a6	21	*
8ace4366	22	* $Id: if_ppp.h,v 1.2 1993/08/31 05:40:38 rgrimes Exp $
2875cbc6	23	* From: if_ppp.h,v 1.4 1993/08/29 11:22:37 paulus Exp $
8b3438a6 RG	24	*/
8b3438a6 RG	25
8ace4366 GW	26	#ifndef _NET_IF_PPP_H_
	27	#define _NET_IF_PPP_H_ 1
	28
8b3438a6 RG	29	/*
	30	* Standard PPP header.
	31	*/
	32	struct ppp_header {
	33	u_char ph_address; /* Address Field */
	34	u_char ph_control; /* Control Field */
	35	u_short ph_protocol; /* Protocol Field */
	36	};
	37
2875cbc6 RG	38	#define PPP_HEADER_LEN 4 /* octets, must == sizeof(struct ppp_header) */
	39	#define PPP_FCS_LEN 2 /* octets for FCS */
	40
8b3438a6 RG	41	#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
	42	#define PPP_UI 0x03 /* Unnumbered Information */
	43	#define PPP_FLAG 0x7e /* Flag Sequence */
	44	#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
	45	#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
	46
	47	/*
	48	* Protocol types.
	49	*/
	50	#define PPP_IP 0x21 /* Internet Protocol */
	51	#define PPP_XNS 0x25 /* Xerox NS */
	52	#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
	53	#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
	54	#define PPP_LCP 0xc021 /* Link Control Protocol */
	55
	56	/*
	57	* Important FCS values.
	58	*/
	59	#define PPP_INITFCS 0xffff /* Initial FCS value */
	60	#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
	61	#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
	62
2875cbc6	63	#define PPP_MTU 1500 /* Default MTU (size of Info field) */
8b3438a6	64	#define PPP_MRU 1500 /* Default MRU (max receive unit) */
2875cbc6	65	#define PPP_MAXMRU 65000 /* Largest MRU we allow */
8b3438a6 RG	66	#define PPP_HIWAT 400 /* Don't start a new packet if HIWAT on que */
	67
	68	struct ppp_softc {
	69	struct ifnet sc_if; /* network-visible interface */
	70	u_int sc_flags; /* see below */
	71	struct tty sc_ttyp; / pointer to tty structure */
	72	struct mbuf sc_outm; / mbuf chain being output currently */
	73	struct mbuf sc_m; / pointer to input mbuf chain */
	74	struct mbuf sc_mc; / pointer to current input mbuf */
	75	char sc_mp; / pointer to next char in input mbuf */
	76	short sc_ilen; /* length of input-packet-so-far */
2875cbc6 RG	77	u_short sc_fcs; /* FCS so far (input) */
	78	u_short sc_outfcs; /* FCS so far for output packet */
	79	short sc_mru; /* max receive unit */
8b3438a6	80	u_long sc_asyncmap; /* async control character map */
2875cbc6	81	u_long sc_rasyncmap; /* receive async control char map */
8b3438a6	82	struct ifqueue sc_inq; /* TTY side input queue */
2875cbc6	83	struct ifqueue sc_fastq; /* IP interactive output packet queue */
8b3438a6 RG	84	#ifdef VJC
	85	struct slcompress sc_comp; /* vjc control buffer */
	86	#endif
	87	u_int sc_bytessent;
	88	u_int sc_bytesrcvd;
2875cbc6	89	caddr_t sc_bpf;
8b3438a6 RG	90	};
	91
	92	/* flags */
2875cbc6 RG	93	#define SC_COMP_PROT 0x00000001 /* protocol compression (output) */
	94	#define SC_COMP_AC 0x00000002 /* header compression (output) */
	95	#define SC_COMP_TCP 0x00000004 /* TCP (VJ) compression (output) */
	96	#define SC_NO_TCP_CCID 0x00000008 /* disable VJ connection-id comp. */
	97	#define SC_REJ_COMP_AC 0x00000010 /* reject adrs/ctrl comp. on input */
	98	#define SC_REJ_COMP_TCP 0x00000020 /* reject TCP (VJ) comp. on input */
	99	#define SC_MASK 0x0000ffff /* bits that user can change */
	100
	101	/* state bits */
8b3438a6 RG	102	#define SC_ESCAPED 0x00010000 /* saw a PPP_ESCAPE */
8b3438a6 RG	103	#define SC_FLUSH 0x00020000 /* flush input until next PPP_FLAG */
8b3438a6 RG	104
	105	#define t_sc T_LINEP
	106
	107	/* this stuff doesn't belong here... */
	108	#define PPPIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */
	109	#define PPPIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */
	110	#define PPPIOCGASYNCMAP _IOR('t', 88, int) /* get async map */
	111	#define PPPIOCSASYNCMAP _IOW('t', 87, int) /* set async map */
	112	#define PPPIOCGUNIT _IOR('t', 86, int) /* get ppp unit number */
2875cbc6 RG	113	#define PPPIOCGRASYNCMAP _IOR('t', 85, int) /* get receive async map */
	114	#define PPPIOCSRASYNCMAP _IOW('t', 84, int) /* set receive async map */
	115	#define PPPIOCGMRU _IOR('t', 83, int) /* get max receive unit */
	116	#define PPPIOCSMRU _IOW('t', 82, int) /* set max receive unit */
8b3438a6 RG	117
	118	/* old copies of PPP may have defined this */
	119	#if !defined(ifr_mtu)
	120	#define ifr_mtu ifr_metric
	121	#endif
	122
8ace4366	123	#endif /* _NET_IF_PPP_H_ */