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/*******************************************************************************
* $Id$
* Copyright 2004, 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.
* From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
******************************************************************************/
#ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */
#define _NET_ETHERNET_H_
#ifndef _TYPEDEFS_H_
#include "typedefs.h"
#endif
#if defined(__GNUC__)
#define PACKED __attribute__((packed))
#else
#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
/*
* Used to uniquely identify a 802.1q VLAN-tagged header.
*/
#define VLAN_TAG 0x8100
/*
* Located after dest & src address in ether header.
*/
#define VLAN_FIELDS_OFFSET (ETHER_ADDR_LEN * 2)
/*
* 4 bytes of vlan field info.
*/
#define VLAN_FIELDS_SIZE 4
/* location of bits in 16-bit vlan fields */
#define VLAN_PRI_SHIFT 13 /* user priority */
#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */
/* 3 bits of priority */
#define VLAN_PRI_MASK 7
/* 12 bits of vlan identfier (VID) */
#define VLAN_VID_MASK 0xFFF /* VLAN identifier (VID) field */
struct vlan_tags {
uint16 tag_type; /* 0x8100 for VLAN */
uint16 tag_control; /* prio | cfi | vid */
} PACKED ;
/* 802.1X ethertype */
#define ETHER_TYPE_IP 0x0800 /* IP */
#define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */
#define ETHER_TYPE_802_1X 0x888e /* 802.1x */
#define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4byte subtype follows ethertype */
#define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */
/*
* 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
/*
* Takes a pointer, returns true if a 48-bit multicast address
* (including broadcast, since it is all ones)
*/
#define ETHER_ISMULTI(ea) (((uint8 *)(ea))[0] & 1)
/*
* 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}};
/*
* 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)
/* Differentiated Services Codepoint - lower 6 bits of tos in iphdr */
#define DSCP_PRI_MASK 0x3F /* bits 0-6 */
#define DSCP_WME_PRI_MASK 0x38 /* bits 3-6 */
#define DSCP_WME_PRI_SHIFT 3
#undef PACKED
#endif /* _NET_ETHERNET_H_ */
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