/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
/*                                                                        */
/* bos720 src/bos/kernel/net/if_dl.h 1.10                                 */
/*                                                                        */
/* Licensed Materials - Property of IBM                                   */
/*                                                                        */
/* COPYRIGHT International Business Machines Corp. 1988,1993              */
/* All Rights Reserved                                                    */
/*                                                                        */
/* US Government Users Restricted Rights - Use, duplication or            */
/* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.      */
/*                                                                        */
/* IBM_PROLOG_END_TAG                                                     */
/* @(#)96	1.10  src/bos/kernel/net/if_dl.h, cmdnet, bos720 2/25/99 13:56:30 */
/*
 *   COMPONENT_NAME: SYSNET
 *
 *   FUNCTIONS: LLADDR
 *		
 *
 *   ORIGINS: 26,27,85
 *
 *
 *   (C) COPYRIGHT International Business Machines Corp. 1988,1993
 *   All Rights Reserved
 *   Licensed Materials - Property of IBM
 *   US Government Users Restricted Rights - Use, duplication or
 *   disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */

/*
 * 
 * (c) Copyright 1991, OPEN SOFTWARE FOUNDATION, INC.
 * ALL RIGHTS RESERVED
 * 
 */
/*
 * OSF/1 1.1 Snapshot 2
 */
/*
 * Copyright (c) 1990 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	Base:	if_dl.h	7.1 (Berkeley) 7/1/90
 */

/* 
 * A Link-Level Sockaddr may specify the interface in one of two
 * ways: either by means of a system-provided index number (computed
 * anew and possibly differently on every reboot), or by a human-readable
 * string such as "il0" (for managerial convenience).
 * 
 * Census taking actions, such as something akin to SIOCGCONF would return
 * both the index and the human name.
 * 
 * High volume transactions (such as giving a link-level ``from'' address
 * in a recvfrom or recvmsg call) may be likely only to provide the indexed
 * form, (which requires fewer copy operations and less space).
 * 
 * The form and interpretation  of the link-level address is purely a matter
 * of convention between the device driver and its consumers; however, it is
 * expected that all drivers for an interface of a given if_type will agree.
 */

#ifndef _NET_IF_DL_H
#define _NET_IF_DL_H

/*
 * Structure of a Link-Level sockaddr:
 */
struct sockaddr_dl {
	u_char	sdl_len;	/* Total length of sockaddr */
	u_char	sdl_family;	/* AF_DLI */
	u_short	sdl_index;	/* if != 0, system given index for interface */
	u_char	sdl_type;	/* interface type */
	u_char	sdl_nlen;	/* interface name length, no trailing 0 reqd. */
	u_char	sdl_alen;	/* link level address length */
	u_char	sdl_slen;	/* link layer selector length */
#define NDP6_MAX_HWADDR 120
#define _802_ADDR_LEN    6
        char    sdl_data[NDP6_MAX_HWADDR];/* minimum work area, can be larger;*/
				   /* contains both if name and ll address */
};

#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))

#endif /* _NET_IF_DL_H */