/*- * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer, *    without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any *    redistribution must be conditioned upon including a substantially *    similar Disclaimer requirement for further binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names *    of any contributors may be used to endorse or promote products derived *    from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGES. * * $Id: if_ethersubr.h 1441 2006-02-06 16:03:21Z mrenzmann $ */#ifndef _NET_IF_ETHERSUBR_H_#define _NET_IF_ETHERSUBR_H_#define	ETHER_ADDR_LEN		6	/* length of an Ethernet address */#define	ETHER_TYPE_LEN		2	/* length of the Ethernet type field */#define	ETHER_CRC_LEN		4	/* length of the Ethernet CRC */#define	ETHER_HDR_LEN		(ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)#define	ETHER_MAX_LEN		1518#define	ETHERMTU	(ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)/* * Structure of a 10Mb/s Ethernet header. */struct	ether_header {	u_char ether_dhost[ETHER_ADDR_LEN];	u_char ether_shost[ETHER_ADDR_LEN];	u_short ether_type;} __packed;#ifndef ETHERTYPE_PAE#define	ETHERTYPE_PAE	0x888e		/* EAPOL PAE/802.1x */#endif#ifndef ETHERTYPE_IP#define	ETHERTYPE_IP	0x0800		/* IP protocol */#endif/* * Structure of a 48-bit Ethernet address. */struct	ether_addr {	u_char octet[ETHER_ADDR_LEN];} __packed;#define	ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */#define VLAN_PRI_SHIFT	13		/* Shift to find VLAN user priority */#define VLAN_PRI_MASK	7		/* Mask for user priority bits in VLAN */#endif /* _NET_IF_ETHERSUBR_H_ */