1*b636d99dSDavid van Moolenbroek /* 2*b636d99dSDavid van Moolenbroek * Copyright (c) 1982, 1986, 1993 3*b636d99dSDavid van Moolenbroek * The Regents of the University of California. All rights reserved. 4*b636d99dSDavid van Moolenbroek * 5*b636d99dSDavid van Moolenbroek * Redistribution and use in source and binary forms, with or without 6*b636d99dSDavid van Moolenbroek * modification, are permitted provided that the following conditions 7*b636d99dSDavid van Moolenbroek * are met: 8*b636d99dSDavid van Moolenbroek * 1. Redistributions of source code must retain the above copyright 9*b636d99dSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer. 10*b636d99dSDavid van Moolenbroek * 2. Redistributions in binary form must reproduce the above copyright 11*b636d99dSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer in the 12*b636d99dSDavid van Moolenbroek * documentation and/or other materials provided with the distribution. 13*b636d99dSDavid van Moolenbroek * 3. Neither the name of the University nor the names of its contributors 14*b636d99dSDavid van Moolenbroek * may be used to endorse or promote products derived from this software 15*b636d99dSDavid van Moolenbroek * without specific prior written permission. 16*b636d99dSDavid van Moolenbroek * 17*b636d99dSDavid van Moolenbroek * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18*b636d99dSDavid van Moolenbroek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*b636d99dSDavid van Moolenbroek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*b636d99dSDavid van Moolenbroek * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21*b636d99dSDavid van Moolenbroek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*b636d99dSDavid van Moolenbroek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*b636d99dSDavid van Moolenbroek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*b636d99dSDavid van Moolenbroek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*b636d99dSDavid van Moolenbroek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*b636d99dSDavid van Moolenbroek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*b636d99dSDavid van Moolenbroek * SUCH DAMAGE. 28*b636d99dSDavid van Moolenbroek * 29*b636d99dSDavid van Moolenbroek * @(#)if_ether.h 8.3 (Berkeley) 5/2/95 30*b636d99dSDavid van Moolenbroek */ 31*b636d99dSDavid van Moolenbroek 32*b636d99dSDavid van Moolenbroek #define ETHERMTU 1500 33*b636d99dSDavid van Moolenbroek 34*b636d99dSDavid van Moolenbroek /* 35*b636d99dSDavid van Moolenbroek * The number of bytes in an ethernet (MAC) address. 36*b636d99dSDavid van Moolenbroek */ 37*b636d99dSDavid van Moolenbroek #define ETHER_ADDR_LEN 6 38*b636d99dSDavid van Moolenbroek 39*b636d99dSDavid van Moolenbroek /* 40*b636d99dSDavid van Moolenbroek * Structure of a DEC/Intel/Xerox or 802.3 Ethernet header. 41*b636d99dSDavid van Moolenbroek */ 42*b636d99dSDavid van Moolenbroek struct ether_header { 43*b636d99dSDavid van Moolenbroek uint8_t ether_dhost[ETHER_ADDR_LEN]; 44*b636d99dSDavid van Moolenbroek uint8_t ether_shost[ETHER_ADDR_LEN]; 45*b636d99dSDavid van Moolenbroek uint16_t ether_type; 46*b636d99dSDavid van Moolenbroek }; 47*b636d99dSDavid van Moolenbroek 48*b636d99dSDavid van Moolenbroek /* 49*b636d99dSDavid van Moolenbroek * Length of a DEC/Intel/Xerox or 802.3 Ethernet header; note that some 50*b636d99dSDavid van Moolenbroek * compilers may pad "struct ether_header" to a multiple of 4 bytes, 51*b636d99dSDavid van Moolenbroek * for example, so "sizeof (struct ether_header)" may not give the right 52*b636d99dSDavid van Moolenbroek * answer. 53*b636d99dSDavid van Moolenbroek */ 54*b636d99dSDavid van Moolenbroek #define ETHER_HDRLEN 14 55