Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / ether.h
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1/* @(#) $Header: /tcpdump/master/tcpdump/ether.h,v 1.8 2002/12/11 07:13:51 guy Exp $ (LBL) */
2/*
3 * Copyright (c) 1982, 1986, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)if_ether.h 8.3 (Berkeley) 5/2/95
35 */
36
37#define ETHERMTU 1500
38
39/*
40 * The number of bytes in an ethernet (MAC) address.
41 */
42#define ETHER_ADDR_LEN 6
43
44/*
45 * Structure of a DEC/Intel/Xerox or 802.3 Ethernet header.
46 */
47struct ether_header {
48 u_int8_t ether_dhost[ETHER_ADDR_LEN];
49 u_int8_t ether_shost[ETHER_ADDR_LEN];
50 u_int16_t ether_type;
51};
52
53/*
54 * Length of a DEC/Intel/Xerox or 802.3 Ethernet header; note that some
55 * compilers may pad "struct ether_header" to a multiple of 4 bytes,
56 * for example, so "sizeof (struct ether_header)" may not give the right
57 * answer.
58 */
59#define ETHER_HDRLEN 14