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git://projects.qi-hardware.com/openwrt-xburst.git
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165 lines
4.0 KiB
C
165 lines
4.0 KiB
C
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/*******************************************************************************
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* $Id$
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* Copyright 2004, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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* From FreeBSD 2.2.7: Fundamental constants relating to ethernet.
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******************************************************************************/
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#ifndef _NET_ETHERNET_H_ /* use native BSD ethernet.h when available */
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#define _NET_ETHERNET_H_
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#ifndef _TYPEDEFS_H_
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#include "typedefs.h"
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#endif
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#if defined(__GNUC__)
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#define PACKED __attribute__((packed))
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#else
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#define PACKED
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#endif
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/*
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* The number of bytes in an ethernet (MAC) address.
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*/
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#define ETHER_ADDR_LEN 6
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/*
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* The number of bytes in the type field.
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*/
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#define ETHER_TYPE_LEN 2
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/*
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* The number of bytes in the trailing CRC field.
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*/
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#define ETHER_CRC_LEN 4
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/*
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* The length of the combined header.
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*/
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#define ETHER_HDR_LEN (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
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/*
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* The minimum packet length.
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*/
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#define ETHER_MIN_LEN 64
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/*
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* The minimum packet user data length.
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*/
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#define ETHER_MIN_DATA 46
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/*
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* The maximum packet length.
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*/
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#define ETHER_MAX_LEN 1518
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/*
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* The maximum packet user data length.
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*/
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#define ETHER_MAX_DATA 1500
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/*
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* Used to uniquely identify a 802.1q VLAN-tagged header.
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*/
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#define VLAN_TAG 0x8100
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/*
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* Located after dest & src address in ether header.
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*/
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#define VLAN_FIELDS_OFFSET (ETHER_ADDR_LEN * 2)
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/*
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* 4 bytes of vlan field info.
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*/
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#define VLAN_FIELDS_SIZE 4
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/* location of bits in 16-bit vlan fields */
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#define VLAN_PRI_SHIFT 13 /* user priority */
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#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */
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/* 3 bits of priority */
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#define VLAN_PRI_MASK 7
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/* 12 bits of vlan identfier (VID) */
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#define VLAN_VID_MASK 0xFFF /* VLAN identifier (VID) field */
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struct vlan_tags {
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uint16 tag_type; /* 0x8100 for VLAN */
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uint16 tag_control; /* prio | cfi | vid */
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} PACKED ;
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/* 802.1X ethertype */
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#define ETHER_TYPE_IP 0x0800 /* IP */
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#define ETHER_TYPE_BRCM 0x886c /* Broadcom Corp. */
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#define ETHER_TYPE_802_1X 0x888e /* 802.1x */
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#define ETHER_BRCM_SUBTYPE_LEN 4 /* Broadcom 4byte subtype follows ethertype */
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#define ETHER_BRCM_CRAM 0x1 /* Broadcom subtype cram protocol */
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/*
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* A macro to validate a length with
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*/
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#define ETHER_IS_VALID_LEN(foo) \
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((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
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#ifndef __INCif_etherh /* Quick and ugly hack for VxWorks */
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/*
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* Structure of a 10Mb/s Ethernet header.
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*/
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struct ether_header {
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uint8 ether_dhost[ETHER_ADDR_LEN];
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uint8 ether_shost[ETHER_ADDR_LEN];
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uint16 ether_type;
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} PACKED ;
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/*
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* Structure of a 48-bit Ethernet address.
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*/
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struct ether_addr {
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uint8 octet[ETHER_ADDR_LEN];
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} PACKED ;
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#endif
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/*
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* Takes a pointer, returns true if a 48-bit multicast address
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* (including broadcast, since it is all ones)
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*/
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#define ETHER_ISMULTI(ea) (((uint8 *)(ea))[0] & 1)
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/*
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* Takes a pointer, returns true if a 48-bit broadcast (all ones)
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*/
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#define ETHER_ISBCAST(ea) ((((uint8 *)(ea))[0] & \
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((uint8 *)(ea))[1] & \
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((uint8 *)(ea))[2] & \
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((uint8 *)(ea))[3] & \
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((uint8 *)(ea))[4] & \
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((uint8 *)(ea))[5]) == 0xff)
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static const struct ether_addr ether_bcast = {{255, 255, 255, 255, 255, 255}};
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/*
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* Takes a pointer, returns true if a 48-bit null address (all zeros)
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*/
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#define ETHER_ISNULLADDR(ea) ((((uint8 *)(ea))[0] | \
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((uint8 *)(ea))[1] | \
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((uint8 *)(ea))[2] | \
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((uint8 *)(ea))[3] | \
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((uint8 *)(ea))[4] | \
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((uint8 *)(ea))[5]) == 0)
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/* Differentiated Services Codepoint - lower 6 bits of tos in iphdr */
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#define DSCP_PRI_MASK 0x3F /* bits 0-6 */
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#define DSCP_WME_PRI_MASK 0x38 /* bits 3-6 */
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#define DSCP_WME_PRI_SHIFT 3
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#undef PACKED
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#endif /* _NET_ETHERNET_H_ */
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