/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 *
 *	@(#)if_ether.h 1.28 89/08/04 SMI; from UCB 7.2 12/7/87
 */

#ifndef _netinet_if_ether_h
#define _netinet_if_ether_h

#if !defined(__OpenBSD__)
#include <net/if_arp.h>
#endif

/*
 * Ethernet address - 6 octets
 */
struct ether_addr {
	u_char	ether_addr_octet[6];
};

/*
 * Structure of a 10Mb/s Ethernet header.
 */
struct	ether_header {
	struct	ether_addr ether_dhost;
	struct	ether_addr ether_shost;
	u_short	ether_type;
};

#define	ETHERTYPE_PUP		0x0200		/* PUP protocol */
#define	ETHERTYPE_IP		0x0800		/* IP protocol */
#define	ETHERTYPE_ARP		0x0806		/* Addr. resolution protocol */
#define	ETHERTYPE_REVARP	0x8035		/* Reverse ARP */
#define ETHERTYPE_TRAIL		0x1000

/*
 * Ethernet Address Resolution Protocol.
 *
 * See RFC 826 for protocol description.  Structure below is adapted
 * to resolving internet addresses.  Field names used correspond to
 * RFC 826.
 */
struct	ether_arp {
	struct	arphdr ea_hdr;		/* fixed-size header */
	struct	ether_addr arp_sha;	/* sender hardware address */
	u_char	arp_spa[4];		/* sender protocol address */
	struct	ether_addr arp_tha;	/* target hardware address */
	u_char	arp_tpa[4];		/* target protocol address */
};
#define	arp_hrd	ea_hdr.ar_hrd
#define	arp_pro	ea_hdr.ar_pro
#define	arp_hln	ea_hdr.ar_hln
#define	arp_pln	ea_hdr.ar_pln
#define	arp_op	ea_hdr.ar_op

#define ETHERMTU	1500
#endif