/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/

/*	  All Rights Reserved  	*/

/** @file

@publishedAll

@released

*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/

/*	The copyright notice above does not evidence any   	*/

/*	actual or intended publication of such source code.	*/

/*

 *		PROPRIETARY NOTICE (Combined)

 *

 *  This source code is unpublished proprietary information

 *  constituting, or derived under license from AT&T's Unix(r) System V.

 *  In addition, portions of such source code were derived from Berkeley

 *  4.3 BSD under license from the Regents of the University of

 *  California.

 *

 *

 *

 *		Copyright Notice

 *

 *  Notice of copyright on this source code product does not indicate

 *  publication.

 *

 *	(c) 1986,1987,1988,1989  Sun Microsystems, Inc.

 *	(c) 1983,1984,1985,1986,1987,1988,1989  AT&T.

 *		All rights reserved.

 */

#ifndef	_NETINET_ARP_H

#define	_NETINET_ARP_H

#ifdef	__cplusplus

extern "C" {

#endif

/**

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 address */

	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	REVARP_REQUEST	3	/* Reverse ARP request */

#define	REVARP_REPLY	4	/* Reverse ARP reply */

	/*

	 * The remaining fields are variable in size,

	 * according to the sizes above, and are defined

	 * as appropriate for specific hardware/protocol

	 * combinations.  (E.g., see <netinet/if_ether.h>.)

	 */

#ifdef	notdef

	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	/* notdef */

};

/**

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 */

};

/**

ARP ioctl request

*/

struct arpreq {

	struct	sockaddr arp_pa;		/* protocol address */

	struct	sockaddr arp_ha;		/* hardware address */

	int	arp_flags;			/* flags */

};

#ifdef	__cplusplus

}

#endif

#endif	/* _NETINET_ARP_H */