1/*
2 * From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
3 *
4 * Copyright (C) 1999-2011, Broadcom Corporation
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * $Id: ethernet.h,v 9.56 2009-10-15 22:54:58 Exp $
19 */
20
21
22#ifndef _NET_ETHERNET_H_
23#define _NET_ETHERNET_H_
24
25#ifndef _TYPEDEFS_H_
26#include "typedefs.h"
27#endif
28
29
30#include <packed_section_start.h>
31
32
33
34#define	ETHER_ADDR_LEN		6
35
36
37#define	ETHER_TYPE_LEN		2
38
39
40#define	ETHER_CRC_LEN		4
41
42
43#define	ETHER_HDR_LEN		(ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
44
45
46#define	ETHER_MIN_LEN		64
47
48
49#define	ETHER_MIN_DATA		46
50
51
52#define	ETHER_MAX_LEN		1518
53
54
55#define	ETHER_MAX_DATA		1500
56
57
58#define ETHER_TYPE_MIN		0x0600
59#define	ETHER_TYPE_IP		0x0800
60#define ETHER_TYPE_ARP		0x0806
61#define ETHER_TYPE_8021Q	0x8100
62#define	ETHER_TYPE_BRCM		0x886c
63#define	ETHER_TYPE_802_1X	0x888e
64#define	ETHER_TYPE_802_1X_PREAUTH 0x88c7
65#define ETHER_TYPE_WAI		0x88b4
66
67
68
69#define	ETHER_BRCM_SUBTYPE_LEN	4
70#define	ETHER_BRCM_CRAM		1
71
72
73#define ETHER_DEST_OFFSET	(0 * ETHER_ADDR_LEN)
74#define ETHER_SRC_OFFSET	(1 * ETHER_ADDR_LEN)
75#define ETHER_TYPE_OFFSET	(2 * ETHER_ADDR_LEN)
76
77
78#define	ETHER_IS_VALID_LEN(foo)	\
79	((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
80
81#define ETHER_FILL_MCAST_ADDR_FROM_IP(ea, mgrp_ip) {		\
82		((uint8 *)ea)[0] = 0x01;			\
83		((uint8 *)ea)[1] = 0x00;			\
84		((uint8 *)ea)[2] = 0x5e;			\
85		((uint8 *)ea)[3] = ((mgrp_ip) >> 16) & 0x7f;	\
86		((uint8 *)ea)[4] = ((mgrp_ip) >>  8) & 0xff;	\
87		((uint8 *)ea)[5] = ((mgrp_ip) >>  0) & 0xff;	\
88}
89
90#ifndef __INCif_etherh
91
92BWL_PRE_PACKED_STRUCT struct ether_header {
93	uint8	ether_dhost[ETHER_ADDR_LEN];
94	uint8	ether_shost[ETHER_ADDR_LEN];
95	uint16	ether_type;
96} BWL_POST_PACKED_STRUCT;
97
98
99BWL_PRE_PACKED_STRUCT struct	ether_addr {
100	uint8 octet[ETHER_ADDR_LEN];
101} BWL_POST_PACKED_STRUCT;
102#endif
103
104
105#define ETHER_SET_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2))
106#define ETHER_IS_LOCALADDR(ea) 	(((uint8 *)(ea))[0] & 2)
107#define ETHER_CLR_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & 0xd))
108#define ETHER_TOGGLE_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2))
109
110
111#define ETHER_SET_UNICAST(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1))
112
113
114#define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1)
115
116
117
118#define	ether_cmp(a, b)	(!(((short*)a)[0] == ((short*)b)[0]) | \
119			 !(((short*)a)[1] == ((short*)b)[1]) | \
120			 !(((short*)a)[2] == ((short*)b)[2]))
121
122
123#define	ether_copy(s, d) { \
124		((short*)d)[0] = ((short*)s)[0]; \
125		((short*)d)[1] = ((short*)s)[1]; \
126		((short*)d)[2] = ((short*)s)[2]; }
127
128
129static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
130static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}};
131
132#define ETHER_ISBCAST(ea)	((((uint8 *)(ea))[0] &		\
133	                          ((uint8 *)(ea))[1] &		\
134				  ((uint8 *)(ea))[2] &		\
135				  ((uint8 *)(ea))[3] &		\
136				  ((uint8 *)(ea))[4] &		\
137				  ((uint8 *)(ea))[5]) == 0xff)
138#define ETHER_ISNULLADDR(ea)	((((uint8 *)(ea))[0] |		\
139				  ((uint8 *)(ea))[1] |		\
140				  ((uint8 *)(ea))[2] |		\
141				  ((uint8 *)(ea))[3] |		\
142				  ((uint8 *)(ea))[4] |		\
143				  ((uint8 *)(ea))[5]) == 0)
144
145
146#define ETHER_MOVE_HDR(d, s) \
147do { \
148	struct ether_header t; \
149	t = *(struct ether_header *)(s); \
150	*(struct ether_header *)(d) = t; \
151} while (0)
152
153
154#include <packed_section_end.h>
155
156#endif
157