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