if_arp.h

VRTX 商用嵌入式实时操作系统

/***************************************************************************
*
*               Copyright (c) 1993 READY SYSTEMS CORPORATION.
*
*       All rights reserved. READY SYSTEMS' source code is an unpublished
*       work and the use of a copyright notice does not imply otherwise.
*       This source code contains confidential, trade secret material of
*       READY SYSTEMS. Any attempt or participation in deciphering, decoding,
*       reverse engineering or in any way altering the source code is
*       strictly prohibited, unless the prior written consent of
*       READY SYSTEMS is obtained.
*
*
*       Module Name:            if_arp.h
*
*       Identification:         @(#) 2.2 if_arp.h
*
*       Date:                   9/16/94  17:21:51
*
****************************************************************************
*/

/*
 RCS header identifier - $Id: if_arp.h,v 1.2 1995/04/23 03:30:41 sriram Exp $
*/
/*
 * Copyrighted as an unpublished work.
 * (c) Copyright 1987-1993 Lachman Technology, Incorporated
 * All rights reserved.
 * 
 * RESTRICTED RIGHTS
 * 
 * These programs are supplied under a license.  They may be used,
 * disclosed, and/or copied only as permitted under such license
 * agreement.  Any copy must contain the above copyright notice and
 * this restricted rights notice.  Use, copying, and/or disclosure
 * of the programs is strictly prohibited unless otherwise provided
 * in the license agreement.
 */
/*
 * Copyright (c) 1985 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, 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'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef if_arp__h
#define if_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 */
	/*
	 * The remaining fields are variable in size, according to the sizes
	 * above. 
	 */
	/* 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 */
};
/* 
 * Structure for SIOCARPREQ
 */
struct arp_req {
	struct	in_addr	*addr;
	char	interface_name[IFNAMSIZ];
};
/*
 * 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 __cplusplus
}
#endif

#define ARPHRD_IEEE 	6	/* ethernet hardware address for 802 networks*/

#endif				/* if_arp__h */