1190207Srpaulo/* @(#) $Header: /tcpdump/master/tcpdump/ether.h,v 1.8 2002-12-11 07:13:51 guy Exp $ (LBL) */ 275115Sfenner/* 375115Sfenner * Copyright (c) 1982, 1986, 1993 475115Sfenner * The Regents of the University of California. All rights reserved. 575115Sfenner * 675115Sfenner * Redistribution and use in source and binary forms, with or without 775115Sfenner * modification, are permitted provided that the following conditions 875115Sfenner * are met: 975115Sfenner * 1. Redistributions of source code must retain the above copyright 1075115Sfenner * notice, this list of conditions and the following disclaimer. 1175115Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1275115Sfenner * notice, this list of conditions and the following disclaimer in the 1375115Sfenner * documentation and/or other materials provided with the distribution. 1475115Sfenner * 3. All advertising materials mentioning features or use of this software 1575115Sfenner * must display the following acknowledgement: 1675115Sfenner * This product includes software developed by the University of 1775115Sfenner * California, Berkeley and its contributors. 1875115Sfenner * 4. Neither the name of the University nor the names of its contributors 1975115Sfenner * may be used to endorse or promote products derived from this software 2075115Sfenner * without specific prior written permission. 2175115Sfenner * 2275115Sfenner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2375115Sfenner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2475115Sfenner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2575115Sfenner * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2675115Sfenner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2775115Sfenner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2875115Sfenner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2975115Sfenner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3075115Sfenner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3175115Sfenner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3275115Sfenner * SUCH DAMAGE. 3375115Sfenner * 3475115Sfenner * @(#)if_ether.h 8.3 (Berkeley) 5/2/95 3575115Sfenner */ 3675115Sfenner 3775115Sfenner#define ETHERMTU 1500 3875115Sfenner 3975115Sfenner/* 4075115Sfenner * The number of bytes in an ethernet (MAC) address. 4175115Sfenner */ 4275115Sfenner#define ETHER_ADDR_LEN 6 4375115Sfenner 4475115Sfenner/* 4575115Sfenner * Structure of a DEC/Intel/Xerox or 802.3 Ethernet header. 4675115Sfenner */ 4775115Sfennerstruct ether_header { 4875115Sfenner u_int8_t ether_dhost[ETHER_ADDR_LEN]; 4975115Sfenner u_int8_t ether_shost[ETHER_ADDR_LEN]; 5075115Sfenner u_int16_t ether_type; 5175115Sfenner}; 5275115Sfenner 5375115Sfenner/* 5475115Sfenner * Length of a DEC/Intel/Xerox or 802.3 Ethernet header; note that some 5575115Sfenner * compilers may pad "struct ether_header" to a multiple of 4 bytes, 5675115Sfenner * for example, so "sizeof (struct ether_header)" may not give the right 5775115Sfenner * answer. 5875115Sfenner */ 5975115Sfenner#define ETHER_HDRLEN 14 60