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	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
	29	*/
	30	/*
	31	* Copyright (c) 1990, 1993
	32	* The Regents of the University of California. All rights reserved.
	33	*
	34	* Redistribution and use in source and binary forms, with or without
	35	* modification, are permitted provided that the following conditions
	36	* are met:
	37	* 1. Redistributions of source code must retain the above copyright
	38	* notice, this list of conditions and the following disclaimer.
	39	* 2. Redistributions in binary form must reproduce the above copyright
	40	* notice, this list of conditions and the following disclaimer in the
	41	* documentation and/or other materials provided with the distribution.
	42	* 3. All advertising materials mentioning features or use of this software
	43	* must display the following acknowledgement:
	44	* This product includes software developed by the University of
	45	* California, Berkeley and its contributors.
	46	* 4. Neither the name of the University nor the names of its contributors
	47	* may be used to endorse or promote products derived from this software
	48	* without specific prior written permission.
	49	*
	50	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	51	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	52	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	53	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	54	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	55	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	56	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	57	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	58	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	59	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	60	* SUCH DAMAGE.
	61	*
	62	* @(#)if_dl.h 8.1 (Berkeley) 6/10/93
	63	* $FreeBSD: src/sys/net/if_dl.h,v 1.10 2000/03/01 02:46:25 archie Exp $
	64	*/
	65
	66	#ifndef _NET_IF_DL_H_
	67	#define _NET_IF_DL_H_
	68	#include <sys/appleapiopts.h>
	69
	70	/*
	71	* A Link-Level Sockaddr may specify the interface in one of two
	72	* ways: either by means of a system-provided index number (computed
	73	* anew and possibly differently on every reboot), or by a human-readable
	74	* string such as "il0" (for managerial convenience).
	75	*
	76	* Census taking actions, such as something akin to SIOCGCONF would return
	77	* both the index and the human name.
	78	*
	79	* High volume transactions (such as giving a link-level ``from'' address
	80	* in a recvfrom or recvmsg call) may be likely only to provide the indexed
	81	* form, (which requires fewer copy operations and less space).
	82	*
	83	* The form and interpretation of the link-level address is purely a matter
	84	* of convention between the device driver and its consumers; however, it is
	85	* expected that all drivers for an interface of a given if_type will agree.
	86	*/
	87
	88	/*
	89	* Structure of a Link-Level sockaddr:
	90	*/
	91	struct sockaddr_dl {
	92	u_char sdl_len; /* Total length of sockaddr */
	93	u_char sdl_family; /* AF_LINK */
	94	u_short sdl_index; /* if != 0, system given index for interface */
	95	u_char sdl_type; /* interface type */
	96	u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
	97	u_char sdl_alen; /* link level address length */
	98	u_char sdl_slen; /* link layer selector length */
	99	char sdl_data[12]; /* minimum work area, can be larger;
	100	contains both if name and ll address */
	101	#ifndef __APPLE__
	102	/* For TokenRing */
	103	u_short sdl_rcf; /* source routing control */
	104	u_short sdl_route[16]; /* source routing information */
	105	#endif
	106	};
	107
	108	#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
	109	#ifdef KERNEL_PRIVATE
	110	#define CONST_LLADDR(s) ((const u_char*)((s)->sdl_data + (s)->sdl_nlen))
	111	#endif
	112
	113	#ifdef BSD_KERNEL_PRIVATE
	114	#define SDL(s) ((struct sockaddr_dl *)s)
	115	#endif
	116
	117	#ifndef KERNEL
	118
	119	#include <sys/cdefs.h>
	120
	121	__BEGIN_DECLS
	122	void link_addr(const char , struct sockaddr_dl );
	123	char link_ntoa(const struct sockaddr_dl );
	124	__END_DECLS
	125
	126	#endif /* !KERNEL */
	127
	128	#endif