| 1 | /* Modified for emx by hv 1994,1996
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| 2 | *
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| 3 | * Copyright (c) 1986 Regents of the University of California.
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | * 1. Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * 3. All advertising materials mentioning features or use of this software
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| 15 | * must display the following acknowledgement:
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| 16 | * This product includes software developed by the University of
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| 17 | * California, Berkeley and its contributors.
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| 18 | * 4. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * from: @(#)if_arp.h 7.4 (Berkeley) 6/28/90
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| 35 | * $Id: if_arp.h,v 1.5 1993/09/05 00:46:54 cassidy Exp $
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| 36 | */
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| 37 |
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| 38 | #ifndef _NET_IF_ARP_H_
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| 39 | #define _NET_IF_ARP_H_
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| 40 |
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| 41 | /*
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| 42 | * Address Resolution Protocol.
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| 43 | *
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| 44 | * See RFC 826 for protocol description. ARP packets are variable
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| 45 | * in size; the arphdr structure defines the fixed-length portion.
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| 46 | * Protocol type values are the same as those for 10 Mb/s Ethernet.
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| 47 | * It is followed by the variable-sized fields ar_sha, arp_spa,
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| 48 | * arp_tha and arp_tpa in that order, according to the lengths
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| 49 | * specified. Field names used correspond to RFC 826.
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| 50 | */
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| 51 | struct arphdr {
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| 52 | u_short ar_hrd; /* format of hardware address */
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| 53 | #define ARPHRD_ETHER 1 /* ethernet hardware address */
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