/* * Copyright (c) 1986, 1993 *	The Regents of the University of California.  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. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE. * *	@(#)if_arp.h	8.1 (Berkeley) 6/10/93 * $FreeBSD: src/sys/net/if_arp.h,v 1.10.2.2 1999/08/29 16:28:15 peter Exp $ */#ifndef _NET_IF_ARP_H_#define	_NET_IF_ARP_H_/* * Address Resolution Protocol. * * See RFC 826 for protocol description.  ARP packets are variable * in size; the arphdr structure defines the fixed-length portion. * Protocol type values are the same as those for 10 Mb/s Ethernet. * It is followed by the variable-sized fields ar_sha, arp_spa, * arp_tha and arp_tpa in that order, according to the lengths * specified.  Field names used correspond to RFC 826. */struct	arphdr {	u_short	ar_hrd;		/* format of hardware address */#define ARPHRD_ETHER 	1	/* ethernet hardware format */#define ARPHRD_IEEE802	6	/* token-ring hardware format */#define ARPHRD_FRELAY 	15	/* frame relay hardware format */	u_short	ar_pro;		/* format of protocol address */	u_char	ar_hln;		/* length of hardware address */	u_char	ar_pln;		/* length of protocol address */	u_short	ar_op;		/* one of: */#define	ARPOP_REQUEST	1	/* request to resolve address */#define	ARPOP_REPLY	2	/* response to previous request */#define	ARPOP_REVREQUEST 3	/* request protocol address given hardware */#define	ARPOP_REVREPLY	4	/* response giving protocol address */#define ARPOP_INVREQUEST 8 	/* request to identify peer */#define ARPOP_INVREPLY	9	/* response identifying peer *//* * The remaining fields are variable in size, * according to the sizes above. */#ifdef COMMENT_ONLY	u_char	ar_sha[];	/* sender hardware address */	u_char	ar_spa[];	/* sender protocol address */	u_char	ar_tha[];	/* target hardware address */	u_char	ar_tpa[];	/* target protocol address */#endif};/* * ARP ioctl request */struct arpreq {	struct	sockaddr arp_pa;		/* protocol address */	struct	sockaddr arp_ha;		/* hardware address */	int	arp_flags;			/* flags */};/*  arp_flags and at_flags field values */#define	ATF_INUSE	0x01	/* entry in use */#define ATF_COM		0x02	/* completed entry (enaddr valid) */#define	ATF_PERM	0x04	/* permanent entry */#define	ATF_PUBL	0x08	/* publish entry (respond for other host) */#define	ATF_USETRAILERS	0x10	/* has requested trailers */#ifdef KERNEL/* * Structure shared between the ethernet driver modules and * the address resolution code.  For example, each ec_softc or il_softc * begins with this structure. */struct	arpcom {	/*	 * The ifnet struct _must_ be at the head of this structure.	 */	struct 	ifnet ac_if;		/* network-visible interface */	u_char	ac_enaddr[6];		/* ethernet hardware address */	int	ac_multicnt;		/* length of ac_multiaddrs list */};extern u_char	etherbroadcastaddr[6];#endif#endif /* !_NET_IF_ARP_H_ */