1/*
  2 * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
  3 *
  4 * @APPLE_OSREFERENCE_LICENSE_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 License
 10 * may not be used to create, or enable the creation or redistribution of,
 11 * unlawful or unlicensed copies of an Apple operating system, or to
 12 * circumvent, violate, or enable the circumvention or violation of, any
 13 * terms of an Apple operating system software license agreement.
 14 *
 15 * Please obtain a copy of the License at
 16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 17 *
 18 * The Original Code and all software distributed under the License are
 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 23 * Please see the License for the specific language governing rights and
 24 * limitations under the License.
 25 *
 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 27 */
 28/*
 29 * Copyright (c) 1990, 1993
 30 *	The Regents of the University of California.  All rights reserved.
 31 *
 32 * Redistribution and use in source and binary forms, with or without
 33 * modification, are permitted provided that the following conditions
 34 * are met:
 35 * 1. Redistributions of source code must retain the above copyright
 36 *    notice, this list of conditions and the following disclaimer.
 37 * 2. Redistributions in binary form must reproduce the above copyright
 38 *    notice, this list of conditions and the following disclaimer in the
 39 *    documentation and/or other materials provided with the distribution.
 40 * 3. All advertising materials mentioning features or use of this software
 41 *    must display the following acknowledgement:
 42 *	This product includes software developed by the University of
 43 *	California, Berkeley and its contributors.
 44 * 4. Neither the name of the University nor the names of its contributors
 45 *    may be used to endorse or promote products derived from this software
 46 *    without specific prior written permission.
 47 *
 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 51 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 58 * SUCH DAMAGE.
 59 *
 60 *	@(#)if_dl.h	8.1 (Berkeley) 6/10/93
 61 * $FreeBSD: src/sys/net/if_dl.h,v 1.10 2000/03/01 02:46:25 archie Exp $
 62 */
 63
 64#ifndef _NET_IF_DL_H_
 65#define _NET_IF_DL_H_
 66#include <sys/appleapiopts.h>
 67
 68#include <sys/_types.h> /* __offsetof() */
 69#include <sys/types.h>
 70
 71
 72/*
 73 * A Link-Level Sockaddr may specify the interface in one of two
 74 * ways: either by means of a system-provided index number (computed
 75 * anew and possibly differently on every reboot), or by a human-readable
 76 * string such as "il0" (for managerial convenience).
 77 *
 78 * Census taking actions, such as something akin to SIOCGCONF would return
 79 * both the index and the human name.
 80 *
 81 * High volume transactions (such as giving a link-level ``from'' address
 82 * in a recvfrom or recvmsg call) may be likely only to provide the indexed
 83 * form, (which requires fewer copy operations and less space).
 84 *
 85 * The form and interpretation  of the link-level address is purely a matter
 86 * of convention between the device driver and its consumers; however, it is
 87 * expected that all drivers for an interface of a given if_type will agree.
 88 */
 89
 90/*
 91 * Structure of a Link-Level sockaddr:
 92 */
 93struct sockaddr_dl {
 94	u_char  sdl_len;        /* Total length of sockaddr */
 95	u_char  sdl_family;     /* AF_LINK */
 96	u_short sdl_index;      /* if != 0, system given index for interface */
 97	u_char  sdl_type;       /* interface type */
 98	u_char  sdl_nlen;       /* interface name length, no trailing 0 reqd. */
 99	u_char  sdl_alen;       /* link level address length */
100	u_char  sdl_slen;       /* link layer selector length */
101	char    sdl_data[12];
102	/* minimum work area, can be larger;
103	 *  contains both if name and ll address */
104#ifndef __APPLE__
105	/* For TokenRing */
106	u_short sdl_rcf;        /* source routing control */
107	u_short sdl_route[16];  /* source routing information */
108#endif
109};
110
111#define LLADDR(s) ((caddr_t)(s) + __offsetof(struct sockaddr_dl, sdl_data) + (s)->sdl_nlen)
112
113
114
115#include <sys/cdefs.h>
116
117__BEGIN_DECLS
118void    link_addr(const char *, struct sockaddr_dl *);
119char    *link_ntoa(const struct sockaddr_dl *);
120__END_DECLS
121
122
123#endif