nataraid(4): Add devstat support.
[dragonfly.git] / sys / net / if_dl.h
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1/*
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if_dl.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/net/if_dl.h,v 1.10 2000/03/01 02:46:25 archie Exp $
1bd40720 35 * $DragonFly: src/sys/net/if_dl.h,v 1.4 2006/05/20 02:42:08 dillon Exp $
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36 */
37
38#ifndef _NET_IF_DL_H_
39#define _NET_IF_DL_H_
40
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41#ifndef _SYS_TYPES_H_
42#include <sys/types.h>
43#endif
44
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45/*
46 * A Link-Level Sockaddr may specify the interface in one of two
47 * ways: either by means of a system-provided index number (computed
48 * anew and possibly differently on every reboot), or by a human-readable
49 * string such as "il0" (for managerial convenience).
50 *
51 * Census taking actions, such as something akin to SIOCGCONF would return
52 * both the index and the human name.
53 *
54 * High volume transactions (such as giving a link-level ``from'' address
55 * in a recvfrom or recvmsg call) may be likely only to provide the indexed
56 * form, (which requires fewer copy operations and less space).
57 *
58 * The form and interpretation of the link-level address is purely a matter
59 * of convention between the device driver and its consumers; however, it is
60 * expected that all drivers for an interface of a given if_type will agree.
61 */
62
63/*
64 * Structure of a Link-Level sockaddr:
65 */
66struct sockaddr_dl {
67 u_char sdl_len; /* Total length of sockaddr */
68 u_char sdl_family; /* AF_LINK */
69 u_short sdl_index; /* if != 0, system given index for interface */
70 u_char sdl_type; /* interface type */
71 u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
72 u_char sdl_alen; /* link level address length */
73 u_char sdl_slen; /* link layer selector length */
74 char sdl_data[12]; /* minimum work area, can be larger;
75 contains both if name and ll address */
76 u_short sdl_rcf; /* source routing control */
77 u_short sdl_route[16]; /* source routing information */
78};
79
80#define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
81
82#ifndef _KERNEL
83
84#include <sys/cdefs.h>
85
86__BEGIN_DECLS
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87void link_addr (const char *, struct sockaddr_dl *);
88char *link_ntoa (const struct sockaddr_dl *);
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89__END_DECLS
90
91#endif /* !_KERNEL */
92
93#endif