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>
69
70#ifdef BSD_KERNEL_PRIVATE
71#define DLIL_SDLMAXLEN 64
72#endif /* BSD_KERNEL_PRIVATE */
73
74/*
75 * A Link-Level Sockaddr may specify the interface in one of two
76 * ways: either by means of a system-provided index number (computed
77 * anew and possibly differently on every reboot), or by a human-readable
78 * string such as "il0" (for managerial convenience).
79 *
80 * Census taking actions, such as something akin to SIOCGCONF would return
81 * both the index and the human name.
82 *
83 * High volume transactions (such as giving a link-level ``from'' address
84 * in a recvfrom or recvmsg call) may be likely only to provide the indexed
85 * form, (which requires fewer copy operations and less space).
86 *
87 * The form and interpretation of the link-level address is purely a matter
88 * of convention between the device driver and its consumers; however, it is
89 * expected that all drivers for an interface of a given if_type will agree.
90 */
91
92/*
93 * Structure of a Link-Level sockaddr:
94 */
95struct sockaddr_dl {
96 u_char sdl_len; /* Total length of sockaddr */
97 u_char sdl_family; /* AF_LINK */
98 u_short sdl_index; /* if != 0, system given index for interface */
99 u_char sdl_type; /* interface type */
100 u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
101 u_char sdl_alen; /* link level address length */
102 u_char sdl_slen; /* link layer selector length */
103 char sdl_data[12]; /* minimum work area, can be larger;
104 contains both if name and ll address */
105#ifndef __APPLE__
106 /* For TokenRing */
107 u_short sdl_rcf; /* source routing control */
108 u_short sdl_route[16]; /* source routing information */
109#endif
110};
111
112#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
113#ifdef KERNEL_PRIVATE
114#define CONST_LLADDR(s) ((const u_char*)((s)->sdl_data + (s)->sdl_nlen))
115#endif
116
117#ifdef BSD_KERNEL_PRIVATE
118#define SDL(s) ((struct sockaddr_dl *)(void *)s)
119#endif
120
121#ifndef KERNEL
122
123#include <sys/cdefs.h>
124
125__BEGIN_DECLS
126void link_addr(const char *, struct sockaddr_dl *);
127char *link_ntoa(const struct sockaddr_dl *);
128__END_DECLS
129
130#endif /* !KERNEL */
131
132#endif
133