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/*
* 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.
*
* $Id$
*/
#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.
*/
#ifndef NOETHREQ /* Quick and ugly hack for VxWorks */
struct ether_addr {
uint8 octet[ETHER_ADDR_LEN];
} PACKED;
#endif
#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_ */
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