2 * From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
4 * Copyright (C) 1999-2011, Broadcom Corporation
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:
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.
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.
24 * $Id: ethernet.h 285437 2011-09-21 22:16:56Z $
28 #ifndef _NET_ETHERNET_H_
29 #define _NET_ETHERNET_H_
36 #include <packed_section_start.h>
40 #define ETHER_ADDR_LEN 6
43 #define ETHER_TYPE_LEN 2
46 #define ETHER_CRC_LEN 4
49 #define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
52 #define ETHER_MIN_LEN 64
55 #define ETHER_MIN_DATA 46
58 #define ETHER_MAX_LEN 1518
61 #define ETHER_MAX_DATA 1500
64 #define ETHER_TYPE_MIN 0x0600
65 #define ETHER_TYPE_IP 0x0800
66 #define ETHER_TYPE_ARP 0x0806
67 #define ETHER_TYPE_8021Q 0x8100
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
76 #define ETHER_BRCM_SUBTYPE_LEN 4
77 #define ETHER_BRCM_CRAM 1
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)
85 #define ETHER_IS_VALID_LEN(foo) \
86 ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
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; \
97 #ifndef __INCif_etherh
99 BWL_PRE_PACKED_STRUCT struct ether_header {
100 uint8 ether_dhost[ETHER_ADDR_LEN];
101 uint8 ether_shost[ETHER_ADDR_LEN];
103 } BWL_POST_PACKED_STRUCT;
106 BWL_PRE_PACKED_STRUCT struct ether_addr {
107 uint8 octet[ETHER_ADDR_LEN];
108 } BWL_POST_PACKED_STRUCT;
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] & 0xd))
115 #define ETHER_TOGGLE_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2))
118 #define ETHER_SET_UNICAST(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1))
121 #define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1)
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]))
130 #define ether_copy(s, d) { \
131 ((short*)d)[0] = ((short*)s)[0]; \
132 ((short*)d)[1] = ((short*)s)[1]; \
133 ((short*)d)[2] = ((short*)s)[2]; }
136 static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
137 static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}};
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)
153 #define ETHER_MOVE_HDR(d, s) \
155 struct ether_header t; \
156 t = *(struct ether_header *)(s); \
157 *(struct ether_header *)(d) = t; \
161 #include <packed_section_end.h>