iso88025.h revision 96400 
1/*
2 * Copyright (c) 1998, Larry Lile
3 * All rights reserved.
4 *
5 * For latest sources and information on this driver, please
6 * go to http://anarchy.stdio.com.
7 *
8 * Questions, comments or suggestions should be directed to
9 * Larry Lile <lile@stdio.com>.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice unmodified, this list of conditions, and the following
16 *    disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: head/sys/net/iso88025.h 96400 2002-05-11 06:27:24Z kbyanc $
34 *
35 * Information gathered from tokenring@freebsd, /sys/net/ethernet.h and
36 * the Mach token ring driver.
37 */
38
39/*
40 * Fundamental constants relating to iso 802.5
41 */
42
43#ifndef _NET_ISO88025_H_
44#define _NET_ISO88025_H_
45
46/*
47 * General ISO 802.5 definitions
48 */
49#define	ISO88025_ADDR_LEN	6
50#define ISO88025_HDR_LEN	(ISO88025_CF_LEN + (ISO88025_ADDR_LEN * 2))
51#define ISO88025_CF_LEN		2
52#define RCF_LEN			2
53#define RIF_MAX_RD		14
54#define RIF_MAX_LEN		16
55
56#define TR_AC			0x10
57#define TR_LLC_FRAME		0x40
58
59#define TR_4MBPS		4000000
60#define TR_16MBPS		16000000
61#define TR_100MBPS		100000000
62
63/*
64 * Source routing
65 */
66#define	TR_RII			0x80
67#define TR_RCF_BCST_MASK	0xe000
68#define TR_RCF_LEN_MASK		0x1f00
69#define TR_RCF_DIR		0x0080
70#define TR_RCF_LF_MASK		0x0070
71
72#define TR_RCF_RIFLEN(x)	((ntohs(x) & TR_RCF_LEN_MASK) >> 8)
73
74/*
75 * Minimum and maximum packet payload lengths.
76 */
77#define	ISO88025_MIN_LEN	0
78#define	ISO88025_MAX_LEN_4	4464
79#define	ISO88025_MAX_LEN_16	17960
80#define	ISO88025_MAX_LEN	ISO88025_MAX_LEN_16
81
82/*
83 * A macro to validate a length with
84 */
85#define	ISO88025_IS_VALID_LEN(foo)	\
86	((foo) >= ISO88025_MIN_LEN && (foo) <= ISO88025_MAX_LEN)
87
88/*
89 * ISO 802.5 physical header
90 */
91struct iso88025_header {
92	u_int8_t	ac;				    /* access control field */
93	u_int8_t	fc;				    /* frame control field */
94	u_int8_t	iso88025_dhost[ISO88025_ADDR_LEN];  /* destination address */
95	u_int8_t	iso88025_shost[ISO88025_ADDR_LEN];  /* source address */
96	u_int16_t	rcf;				    /* route control field */
97	u_int16_t	rd[RIF_MAX_RD];			    /* routing designators */
98} __attribute__ ((__packed__));
99
100struct iso88025_rif {
101	u_int16_t	rcf;				    /* route control field */
102	u_int16_t	rd[RIF_MAX_RD];			    /* routing designators */
103} __attribute__ ((__packed__));
104
105struct iso88025_sockaddr_data {
106	u_char ether_dhost[ISO88025_ADDR_LEN];
107	u_char ether_shost[ISO88025_ADDR_LEN];
108	u_char ac;
109	u_char fc;
110};
111
112struct iso88025_sockaddr_dl_data {
113	u_short	 trld_rcf;
114	u_short	*trld_route[RIF_MAX_LEN];
115};
116
117#define ISO88025_MAX(a, b)	(((a)>(b))?(a):(b))
118#define SDL_ISO88025(s)		((struct iso88025_sockaddr_dl_data *)	\
119				 ((s)->sdl_data + \
120				  ISO88025_MAX((s)->sdl_nlen + (s)->sdl_alen + \
121					       (s)->sdl_slen, 12)))
122
123/*
124 * Structure of a 48-bit iso 802.5 address.
125 *  ( We could also add the 16 bit addresses as a union)
126 */
127struct	iso88025_addr {
128	u_char octet[ISO88025_ADDR_LEN];
129};
130
131#define ISO88025_MAX_MTU	18000
132#define ISO88025_DEFAULT_MTU	1500
133#define senderr(e) { error = (e); goto bad;}
134
135void	iso88025_ifattach	(struct ifnet *);
136void	iso88025_ifdetach	(struct ifnet *, int);
137int	iso88025_ioctl		(struct ifnet *, int , caddr_t );
138int	iso88025_output		(struct ifnet *, struct mbuf *, struct sockaddr *,
139				 struct rtentry *);
140void	iso88025_input		(struct ifnet *, struct iso88025_header *,
141				 struct mbuf *);
142
143#endif
144