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 */