diff options
Diffstat (limited to 'ether.h')
| -rw-r--r-- | ether.h | 59 |
1 files changed, 59 insertions, 0 deletions
@@ -0,0 +1,59 @@ +/* @(#) $Header: /tcpdump/master/tcpdump/ether.h,v 1.8 2002-12-11 07:13:51 guy Exp $ (LBL) */ +/* + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)if_ether.h 8.3 (Berkeley) 5/2/95 + */ + +#define ETHERMTU 1500 + +/* + * The number of bytes in an ethernet (MAC) address. + */ +#define ETHER_ADDR_LEN 6 + +/* + * Structure of a DEC/Intel/Xerox or 802.3 Ethernet header. + */ +struct ether_header { + u_int8_t ether_dhost[ETHER_ADDR_LEN]; + u_int8_t ether_shost[ETHER_ADDR_LEN]; + u_int16_t ether_type; +}; + +/* + * Length of a DEC/Intel/Xerox or 802.3 Ethernet header; note that some + * compilers may pad "struct ether_header" to a multiple of 4 bytes, + * for example, so "sizeof (struct ether_header)" may not give the right + * answer. + */ +#define ETHER_HDRLEN 14 |