4e3197cb69e31f372949606b522bc51991ed4a77
[openwrt/svn-archive/archive.git] / package / broadcom-wl / src / include / proto / ethernet.h
1 /*
2 * From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
3 *
4 * Copyright 2006, 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
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_IP 0x0800 /* IP */
71 #define ETHER_TYPE_ARP 0x0806 /* ARP */
72 #define ETHER_TYPE_8021Q 0x8100 /* 802.1Q */
73 #define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */
74 #define ETHER_TYPE_802_1X 0x888e /* 802.1x */
75 #ifdef BCMWPA2
76 #define ETHER_TYPE_802_1X_PREAUTH 0x88c7 /* 802.1x preauthentication */
77 #endif
78
79 /* Broadcom subtype follows ethertype; First 2 bytes are reserved; Next 2 are subtype; */
80 #define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4 byte subtype */
81 #define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */
82
83 /* ether header */
84 #define ETHER_DEST_OFFSET 0 /* dest address offset */
85 #define ETHER_SRC_OFFSET 6 /* src address offset */
86 #define ETHER_TYPE_OFFSET 12 /* ether type offset */
87
88 /*
89 * A macro to validate a length with
90 */
91 #define ETHER_IS_VALID_LEN(foo) \
92 ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
93
94
95 #ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */
96 /*
97 * Structure of a 10Mb/s Ethernet header.
98 */
99 struct ether_header {
100 uint8 ether_dhost[ETHER_ADDR_LEN];
101 uint8 ether_shost[ETHER_ADDR_LEN];
102 uint16 ether_type;
103 } PACKED;
104
105 /*
106 * Structure of a 48-bit Ethernet address.
107 */
108 struct ether_addr {
109 uint8 octet[ETHER_ADDR_LEN];
110 } PACKED;
111 #endif /* !__INCif_etherh Quick and ugly hack for VxWorks */
112
113 /*
114 * Takes a pointer, sets locally admininistered
115 * address bit in the 48-bit Ethernet address.
116 */
117 #define ETHER_SET_LOCALADDR(ea) (((uint8 *)(ea))[0] = (((uint8 *)(ea))[0] | 2))
118
119 /*
120 * Takes a pointer, returns true if a 48-bit multicast address
121 * (including broadcast, since it is all ones)
122 */
123 #define ETHER_ISMULTI(ea) (((uint8 *)(ea))[0] & 1)
124
125
126 /* compare two ethernet addresses - assumes the pointers can be referenced as shorts */
127 #define ether_cmp(a, b) (!(((short*)a)[0] == ((short*)b)[0]) | \
128 !(((short*)a)[1] == ((short*)b)[1]) | \
129 !(((short*)a)[2] == ((short*)b)[2]))
130
131 /* copy an ethernet address - assumes the pointers can be referenced as shorts */
132 #define ether_copy(s, d) { \
133 ((short*)d)[0] = ((short*)s)[0]; \
134 ((short*)d)[1] = ((short*)s)[1]; \
135 ((short*)d)[2] = ((short*)s)[2]; }
136
137 /*
138 * Takes a pointer, returns true if a 48-bit broadcast (all ones)
139 */
140 #define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \
141 ((uint8 *)(ea))[1] & \
142 ((uint8 *)(ea))[2] & \
143 ((uint8 *)(ea))[3] & \
144 ((uint8 *)(ea))[4] & \
145 ((uint8 *)(ea))[5]) == 0xff)
146
147 static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
148
149 /*
150 * Takes a pointer, returns true if a 48-bit null address (all zeros)
151 */
152 #define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \
153 ((uint8 *)(ea))[1] | \
154 ((uint8 *)(ea))[2] | \
155 ((uint8 *)(ea))[3] | \
156 ((uint8 *)(ea))[4] | \
157 ((uint8 *)(ea))[5]) == 0)
158
159 #undef PACKED
160 #if !defined(__GNUC__)
161 #pragma pack()
162 #endif
163
164 #endif /* __NET_ETHERNET_H */