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596742a577
4 bytes, even though no member in the structure requires such an alignment; don't use "sizeof (struct ether_arp), explicitly #define the header length and use that #defined value. We don't use "struct ether_addr" in any dissectors, so there's no need to define it in "ether.h" - and, if compilers pad it to a multiple of 4 bytes, you can't use it anyway, as it'll be 8 bytes long, not 6 bytes long.
60 lines
2.5 KiB
C
60 lines
2.5 KiB
C
/* @(#) $Header: /tcpdump/master/tcpdump/ether.h,v 1.6 2000-10-09 03:24:24 guy Exp $ (LBL) */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ether.h 8.3 (Berkeley) 5/2/95
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*/
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#define ETHERMTU 1500
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/*
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* The number of bytes in an ethernet (MAC) address.
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*/
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#define ETHER_ADDR_LEN 6
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/*
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* Structure of a DEC/Intel/Xerox or 802.3 Ethernet header.
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*/
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struct ether_header {
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u_int8_t ether_dhost[ETHER_ADDR_LEN];
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u_int8_t ether_shost[ETHER_ADDR_LEN];
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u_int16_t ether_type;
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};
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/*
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* Length of a DEC/Intel/Xerox or 802.3 Ethernet header; note that some
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* compilers may pad "struct ether_header" to a multiple of 4 bytes,
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* for example, so "sizeof (struct ether_header)" may not give the right
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* answer.
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*/
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#define ETHER_HDRLEN 14
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