1/*
2 * From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
3 *
4 * Copyright (C) 1999-2012, Broadcom Corporation
5 *
6 *      Unless you and Broadcom execute a separate written software license
7 * agreement governing use of this software, this software is licensed to you
8 * under the terms of the GNU General Public License version 2 (the "GPL"),
9 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
10 * following added to such license:
11 *
12 *      As a special exception, the copyright holders of this software give you
13 * permission to link this software with independent modules, and to copy and
14 * distribute the resulting executable under terms of your choice, provided that
15 * you also meet, for each linked independent module, the terms and conditions of
16 * the license of that module.  An independent module is a module which is not
17 * derived from this software.  The special exception does not apply to any
18 * modifications of the software.
19 *
20 *      Notwithstanding the above, under no circumstances may you combine this
21 * software in any way with any other Broadcom software provided under a license
22 * other than the GPL, without Broadcom's express prior written consent.
23 *
24 * $Id: ethernet.h 309193 2012-01-19 00:03:57Z $
25 */
26
27#ifndef _NET_ETHERNET_H_
28#define _NET_ETHERNET_H_
29
30#ifndef _TYPEDEFS_H_
31#include "typedefs.h"
32#endif
33
34
35#include <packed_section_start.h>
36
37
38
39#define	ETHER_ADDR_LEN		6
40
41
42#define	ETHER_TYPE_LEN		2
43
44
45#define	ETHER_CRC_LEN		4
46
47
48#define	ETHER_HDR_LEN		(ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
49
50
51#define	ETHER_MIN_LEN		64
52
53
54#define	ETHER_MIN_DATA		46
55
56
57#define	ETHER_MAX_LEN		1518
58
59
60#define	ETHER_MAX_DATA		1500
61
62
63#define ETHER_TYPE_MIN		0x0600
64#define	ETHER_TYPE_IP		0x0800
65#define ETHER_TYPE_ARP		0x0806
66#define ETHER_TYPE_8021Q	0x8100
67#define	ETHER_TYPE_IPV6		0x86dd
68#define	ETHER_TYPE_BRCM		0x886c
69#define	ETHER_TYPE_802_1X	0x888e
70#define	ETHER_TYPE_802_1X_PREAUTH 0x88c7
71#define ETHER_TYPE_WAI		0x88b4
72#define ETHER_TYPE_89_0D	0x890d
73
74#define ETHER_TYPE_IPV6		0x86dd
75
76
77#define	ETHER_BRCM_SUBTYPE_LEN	4
78
79
80#define ETHER_DEST_OFFSET	(0 * ETHER_ADDR_LEN)
81#define ETHER_SRC_OFFSET	(1 * ETHER_ADDR_LEN)
82#define ETHER_TYPE_OFFSET	(2 * ETHER_ADDR_LEN)
83
84
85#define	ETHER_IS_VALID_LEN(foo)	\
86	((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
87
88#define ETHER_FILL_MCAST_ADDR_FROM_IP(ea, mgrp_ip) {		\
89		((uint8 *)ea)[0] = 0x01;			\
90		((uint8 *)ea)[1] = 0x00;			\
91		((uint8 *)ea)[2] = 0x5e;			\
92		((uint8 *)ea)[3] = ((mgrp_ip) >> 16) & 0x7f;	\
93		((uint8 *)ea)[4] = ((mgrp_ip) >>  8) & 0xff;	\
94		((uint8 *)ea)[5] = ((mgrp_ip) >>  0) & 0xff;	\
95}
96
97#ifndef __INCif_etherh
98
99BWL_PRE_PACKED_STRUCT struct ether_header {
100	uint8	ether_dhost[ETHER_ADDR_LEN];
101	uint8	ether_shost[ETHER_ADDR_LEN];
102	uint16	ether_type;
103} BWL_POST_PACKED_STRUCT;
104
105
106BWL_PRE_PACKED_STRUCT struct	ether_addr {
107	uint8 octet[ETHER_ADDR_LEN];
108} BWL_POST_PACKED_STRUCT;
109#endif
110
111
112#define ETHER_SET_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2))
113#define ETHER_IS_LOCALADDR(ea) 	(((uint8 *)(ea))[0] & 2)
114#define ETHER_CLR_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & 0xfd))
115#define ETHER_TOGGLE_LOCALADDR(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2))
116
117
118#define ETHER_SET_UNICAST(ea)	(((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1))
119
120
121#define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1)
122
123
124
125#define	ether_cmp(a, b)	(!(((short*)(a))[0] == ((short*)(b))[0]) | \
126			 !(((short*)(a))[1] == ((short*)(b))[1]) | \
127			 !(((short*)(a))[2] == ((short*)(b))[2]))
128
129
130#define	ether_copy(s, d) { \
131		((short*)(d))[0] = ((const short*)(s))[0]; \
132		((short*)(d))[1] = ((const short*)(s))[1]; \
133		((short*)(d))[2] = ((const short*)(s))[2]; }
134
135
136static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
137static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}};
138
139#define ETHER_ISBCAST(ea)	((((uint8 *)(ea))[0] &		\
140	                          ((uint8 *)(ea))[1] &		\
141				  ((uint8 *)(ea))[2] &		\
142				  ((uint8 *)(ea))[3] &		\
143				  ((uint8 *)(ea))[4] &		\
144				  ((uint8 *)(ea))[5]) == 0xff)
145#define ETHER_ISNULLADDR(ea)	((((uint8 *)(ea))[0] |		\
146				  ((uint8 *)(ea))[1] |		\
147				  ((uint8 *)(ea))[2] |		\
148				  ((uint8 *)(ea))[3] |		\
149				  ((uint8 *)(ea))[4] |		\
150				  ((uint8 *)(ea))[5]) == 0)
151
152#define ETHER_MOVE_HDR(d, s) \
153do { \
154	struct ether_header t; \
155	t = *(struct ether_header *)(s); \
156	*(struct ether_header *)(d) = t; \
157} while (0)
158
159
160#include <packed_section_end.h>
161
162#endif
163