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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1990, 1993
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)if_dl.h 8.1 (Berkeley) 6/10/93
59: */
60:
61: /*
62: * A Link-Level Sockaddr may specify the interface in one of two
63: * ways: either by means of a system-provided index number (computed
64: * anew and possibly differently on every reboot), or by a human-readable
65: * string such as "il0" (for managerial convenience).
66: *
67: * Census taking actions, such as something akin to SIOCGCONF would return
68: * both the index and the human name.
69: *
70: * High volume transactions (such as giving a link-level ``from'' address
71: * in a recvfrom or recvmsg call) may be likely only to provide the indexed
72: * form, (which requires fewer copy operations and less space).
73: *
74: * The form and interpretation of the link-level address is purely a matter
75: * of convention between the device driver and its consumers; however, it is
76: * expected that all drivers for an interface of a given if_type will agree.
77: */
78:
79: /*
80: * Structure of a Link-Level sockaddr:
81: */
82: struct sockaddr_dl {
83: u_char sdl_len; /* Total length of sockaddr */
84: u_char sdl_family; /* AF_DLI */
85: u_int16_t sdl_index; /* if != 0, system given index for interface */
86: u_char sdl_type; /* interface type */
87: u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
88: u_char sdl_alen; /* link level address length */
89: u_char sdl_slen; /* link layer selector length */
90: char sdl_data[12]; /* minimum work area, can be larger;
91: contains both if name and ll address */
92: };
93:
94: #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
95:
96: #ifndef _KERNEL
97:
98: #include <sys/cdefs.h>
99:
100: __BEGIN_DECLS
101: void link_addr __P((const char *, struct sockaddr_dl *));
102: char *link_ntoa __P((const struct sockaddr_dl *));
103: __END_DECLS
104:
105: #endif /* !_KERNEL */
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