package/wlc/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  * $Id: ethernet.h,v 1.1.1.14 2006/02/27 03:43:16 honor Exp $
  13  */
  14
  15 #ifndef _NET_ETHERNET_H_            /* use native BSD ethernet.h when available */
  16 #define _NET_ETHERNET_H_
  17
  18 #ifndef _TYPEDEFS_H_
  19 #include "typedefs.h"
  20 #endif
  21
  22 /* enable structure packing */
  23 #if defined(__GNUC__)
  24 #define PACKED  __attribute__((packed))
  25 #else
  26 #pragma pack(1)
  27 #define PACKED
  28 #endif
  29
  30 /*
  31  * The number of bytes in an ethernet (MAC) address.
  32  */
  33 #define ETHER_ADDR_LEN          6
  34
  35 /*
  36  * The number of bytes in the type field.
  37  */
  38 #define ETHER_TYPE_LEN          2
  39
  40 /*
  41  * The number of bytes in the trailing CRC field.
  42  */
  43 #define ETHER_CRC_LEN           4
  44
  45 /*
  46  * The length of the combined header.
  47  */
  48 #define ETHER_HDR_LEN           (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
  49
  50 /*
  51  * The minimum packet length.
  52  */
  53 #define ETHER_MIN_LEN           64
  54
  55 /*
  56  * The minimum packet user data length.
  57  */
  58 #define ETHER_MIN_DATA          46
  59
  60 /*
  61  * The maximum packet length.
  62  */
  63 #define ETHER_MAX_LEN           1518
  64
  65 /*
  66  * The maximum packet user data length.
  67  */
  68 #define ETHER_MAX_DATA          1500
  69
  70 /* ether types */
  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               /* dest address offset */
  86 #define ETHER_SRC_OFFSET        6               /* src address offset */
  87 #define ETHER_TYPE_OFFSET       12              /* 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  */
 100 struct  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  */
 109 struct  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, sets 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
 120 /*
 121  * Takes a pointer, returns true if a 48-bit multicast address
 122  * (including broadcast, since it is all ones)
 123  */
 124 #define ETHER_ISMULTI(ea) (((uint8 *)(ea))[0] & 1)
 125
 126
 127 /* compare two ethernet addresses - assumes the pointers can be referenced as shorts */
 128 #define ether_cmp(a, b) (!(((short*)a)[0] == ((short*)b)[0]) | \
 129                          !(((short*)a)[1] == ((short*)b)[1]) | \
 130                          !(((short*)a)[2] == ((short*)b)[2]))
 131
 132 /* copy an ethernet address - assumes the pointers can be referenced as shorts */
 133 #define ether_copy(s, d) { \
 134                 ((short*)d)[0] = ((short*)s)[0]; \
 135                 ((short*)d)[1] = ((short*)s)[1]; \
 136                 ((short*)d)[2] = ((short*)s)[2]; }
 137
 138 /*
 139  * Takes a pointer, returns true if a 48-bit broadcast (all ones)
 140  */
 141 #define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] &                \
 142                             ((uint8 *)(ea))[1] &                \
 143                             ((uint8 *)(ea))[2] &                \
 144                             ((uint8 *)(ea))[3] &                \
 145                             ((uint8 *)(ea))[4] &                \
 146                             ((uint8 *)(ea))[5]) == 0xff)
 147
 148 static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
 149
 150 /*
 151  * Takes a pointer, returns true if a 48-bit null address (all zeros)
 152  */
 153 #define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] |             \
 154                             ((uint8 *)(ea))[1] |                \
 155                             ((uint8 *)(ea))[2] |                \
 156                             ((uint8 *)(ea))[3] |                \
 157                             ((uint8 *)(ea))[4] |                \
 158                             ((uint8 *)(ea))[5]) == 0)
 159
 160 #undef PACKED
 161 #if !defined(__GNUC__)
 162 #pragma pack()
 163 #endif
 164
 165 #endif /* _NET_ETHERNET_H_ */