Root/package/broadcom-57xx/src/proto/ethernet.h

1/*
2 * From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
3 *
4 * Copyright 2007, Broadcom Corporation
5 * All Rights Reserved.
6 *
7 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
8 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
9 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
10 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
11 *
12 */
13
14#ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */
15#define _NET_ETHERNET_H_
16
17#ifndef _TYPEDEFS_H_
18#include "typedefs.h"
19#endif
20
21/* enable structure packing */
22#if defined(__GNUC__)
23#define PACKED __attribute__((packed))
24#else
25#pragma pack(1)
26#define PACKED
27#endif
28
29/*
30 * The number of bytes in an ethernet (MAC) address.
31 */
32#define ETHER_ADDR_LEN 6
33
34/*
35 * The number of bytes in the type field.
36 */
37#define ETHER_TYPE_LEN 2
38
39/*
40 * The number of bytes in the trailing CRC field.
41 */
42#define ETHER_CRC_LEN 4
43
44/*
45 * The length of the combined header.
46 */
47#define ETHER_HDR_LEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
48
49/*
50 * The minimum packet length.
51 */
52#define ETHER_MIN_LEN 64
53
54/*
55 * The minimum packet user data length.
56 */
57#define ETHER_MIN_DATA 46
58
59/*
60 * The maximum packet length.
61 */
62#define ETHER_MAX_LEN 1518
63
64/*
65 * The maximum packet user data length.
66 */
67#define ETHER_MAX_DATA 1500
68
69/* ether types */
70#define ETHER_TYPE_MIN 0x0600 /* Anything less than MIN is a length */
71#define ETHER_TYPE_IP 0x0800 /* IP */
72#define ETHER_TYPE_ARP 0x0806 /* ARP */
73#define ETHER_TYPE_8021Q 0x8100 /* 802.1Q */
74#define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */
75#define ETHER_TYPE_802_1X 0x888e /* 802.1x */
76#ifdef BCMWPA2
77#define ETHER_TYPE_802_1X_PREAUTH 0x88c7 /* 802.1x preauthentication */
78#endif
79
80/* Broadcom subtype follows ethertype; First 2 bytes are reserved; Next 2 are subtype; */
81#define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4 byte subtype */
82#define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */
83
84/* ether header */
85#define ETHER_DEST_OFFSET (0 * ETHER_ADDR_LEN) /* dest address offset */
86#define ETHER_SRC_OFFSET (1 * ETHER_ADDR_LEN) /* src address offset */
87#define ETHER_TYPE_OFFSET (2 * ETHER_ADDR_LEN) /* ether type offset */
88
89/*
90 * A macro to validate a length with
91 */
92#define ETHER_IS_VALID_LEN(foo) \
93    ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
94
95
96#ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */
97/*
98 * Structure of a 10Mb/s Ethernet header.
99 */
100struct ether_header {
101    uint8 ether_dhost[ETHER_ADDR_LEN];
102    uint8 ether_shost[ETHER_ADDR_LEN];
103    uint16 ether_type;
104} PACKED;
105
106/*
107 * Structure of a 48-bit Ethernet address.
108 */
109struct ether_addr {
110    uint8 octet[ETHER_ADDR_LEN];
111} PACKED;
112#endif /* !__INCif_etherh Quick and ugly hack for VxWorks */
113
114/*
115 * Takes a pointer, set, test, clear, toggle locally admininistered
116 * address bit in the 48-bit Ethernet address.
117 */
118#define ETHER_SET_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2))
119#define ETHER_IS_LOCALADDR(ea) (((uint8 *)(ea))[0] & 2)
120#define ETHER_CLR_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & 0xd))
121#define ETHER_TOGGLE_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] ^ 2))
122
123/* Takes a pointer, marks unicast address bit in the MAC address */
124#define ETHER_SET_UNICAST(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] & ~1))
125
126/*
127 * Takes a pointer, returns true if a 48-bit multicast address
128 * (including broadcast, since it is all ones)
129 */
130#define ETHER_ISMULTI(ea) (((const uint8 *)(ea))[0] & 1)
131
132
133/* compare two ethernet addresses - assumes the pointers can be referenced as shorts */
134#define ether_cmp(a, b) (!(((short*)a)[0] == ((short*)b)[0]) | \
135             !(((short*)a)[1] == ((short*)b)[1]) | \
136             !(((short*)a)[2] == ((short*)b)[2]))
137
138/* copy an ethernet address - assumes the pointers can be referenced as shorts */
139#define ether_copy(s, d) { \
140        ((short*)d)[0] = ((short*)s)[0]; \
141        ((short*)d)[1] = ((short*)s)[1]; \
142        ((short*)d)[2] = ((short*)s)[2]; }
143
144/*
145 * Takes a pointer, returns true if a 48-bit broadcast (all ones)
146 */
147#define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \
148                ((uint8 *)(ea))[1] & \
149                ((uint8 *)(ea))[2] & \
150                ((uint8 *)(ea))[3] & \
151                ((uint8 *)(ea))[4] & \
152                ((uint8 *)(ea))[5]) == 0xff)
153
154static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
155static const struct ether_addr ether_null = {{0, 0, 0, 0, 0, 0}};
156
157/*
158 * Takes a pointer, returns true if a 48-bit null address (all zeros)
159 */
160#define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \
161                ((uint8 *)(ea))[1] | \
162                ((uint8 *)(ea))[2] | \
163                ((uint8 *)(ea))[3] | \
164                ((uint8 *)(ea))[4] | \
165                ((uint8 *)(ea))[5]) == 0)
166
167#undef PACKED
168#if !defined(__GNUC__)
169#pragma pack()
170#endif
171
172#endif /* _NET_ETHERNET_H_ */
173

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