Watt-32 tcp/ip  2.2 dev-rel.10
if_dl.h
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1 
5 /* $NetBSD: if_dl.h,v 1.8 1995/03/26 20:30:13 jtc Exp $ */
6 
7 /*
8  * Copyright (c) 1990, 1993
9  * The Regents of the University of California. All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in the
18  * documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  * must display the following acknowledgement:
21  * This product includes software developed by the University of
22  * California, Berkeley and its contributors.
23  * 4. Neither the name of the University nor the names of its contributors
24  * may be used to endorse or promote products derived from this software
25  * without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37  * SUCH DAMAGE.
38  *
39  * @(#)if_dl.h 8.1 (Berkeley) 6/10/93
40  */
41 #ifndef __NET_IF_DL_H
42 #define __NET_IF_DL_H
43 
44 #ifndef __SYS_W32API_H
45 #include <sys/w32api.h>
46 #endif
47 
48 #ifndef __SYS_CDEFS_H
49 #include <sys/cdefs.h>
50 #endif
51 
52 /*
53  * A Link-Level Sockaddr may specify the interface in one of two
54  * ways: either by means of a system-provided index number (computed
55  * anew and possibly differently on every reboot), or by a human-readable
56  * string such as "il0" (for managerial convenience).
57  *
58  * Census taking actions, such as something akin to SIOCGCONF would return
59  * both the index and the human name.
60  *
61  * High volume transactions (such as giving a link-level ``from'' address
62  * in a recvfrom or recvmsg call) may be likely only to provide the indexed
63  * form, (which requires fewer copy operations and less space).
64  *
65  * The form and interpretation of the link-level address is purely a matter
66  * of convention between the device driver and its consumers; however, it is
67  * expected that all drivers for an interface of a given if_type will agree.
68  */
69 
70 /*
71  * Structure of a Link-Level sockaddr:
72  */
73 struct sockaddr_dl {
74  u_char sdl_len; /* Total length of sockaddr */
75  u_char sdl_family; /* AF_DLI */
76  u_int16_t sdl_index; /* if != 0, system given index for interface */
77  u_char sdl_type; /* interface type */
78  u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
79  u_char sdl_alen; /* link level address length */
80  u_char sdl_slen; /* link layer selector length */
81  char sdl_data[12]; /* minimum work area, can be larger;
82  * contains both if name and ll address */
83 };
84 
85 #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
86 
87 __BEGIN_DECLS
88 
89 W32_FUNC void W32_CALL link_addr (const char *, struct sockaddr_dl *);
90 W32_FUNC char *W32_CALL link_ntoa (const struct sockaddr_dl *);
91 
92 __END_DECLS
93 
94 #endif