0,0 → 1,117 |
/*!\file net/if_arp.h |
* ARP definitions. |
*/ |
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/* $NetBSD: if_arp.h,v 1.12 1997/09/08 02:06:30 mikel Exp $ */ |
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/* |
* Copyright (c) 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_arp.h 8.1 (Berkeley) 6/10/93 |
*/ |
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#ifndef __NET_IF_ARP_H |
#define __NET_IF_ARP_H |
/* |
* Address Resolution Protocol. |
* |
* See RFC 826 for protocol description. ARP packets are variable |
* in size; the arphdr structure defines the fixed-length portion. |
* Protocol type values are the same as those for 10 Mb/s Ethernet. |
* It is followed by the variable-sized fields ar_sha, arp_spa, |
* arp_tha and arp_tpa in that order, according to the lengths |
* specified. Field names used correspond to RFC 826. |
*/ |
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#include <sys/packon.h> |
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struct arphdr { |
u_int16_t ar_hrd; /* format of hardware address */ |
#define ARPHRD_ETHER 1 /* ethernet hardware format */ |
#define ARPHRD_TOKEN 6 /* TokenRing hardware format */ |
#define ARPHRD_ARCNET 7 /* ethernet hardware format */ |
#define ARPHRD_FRELAY 15 /* frame relay hardware format */ |
#define ARPHRD_STRIP 23 /* Ricochet Starmode Radio hardware format */ |
u_int16_t ar_pro; /* format of protocol address */ |
u_int8_t ar_hln; /* length of hardware address */ |
u_int8_t ar_pln; /* length of protocol address */ |
u_int16_t ar_op; /* one of: */ |
#define ARPOP_REQUEST 1 /* request to resolve address */ |
#define ARPOP_REPLY 2 /* response to previous request */ |
#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ |
#define ARPOP_REVREPLY 4 /* response giving protocol address */ |
#define ARPOP_INVREQUEST 8 /* request to identify peer */ |
#define ARPOP_INVREPLY 9 /* response identifying peer */ |
/* |
* The remaining fields are variable in size, |
* according to the sizes above. |
*/ |
#ifdef COMMENT_ONLY |
u_int8_t ar_sha[]; /* sender hardware address */ |
u_int8_t ar_spa[]; /* sender protocol address */ |
u_int8_t ar_tha[]; /* target hardware address */ |
u_int8_t ar_tpa[]; /* target protocol address */ |
#endif |
#ifdef __GNUC__ /* only GNU C allows zero arrays */ |
u_int8_t ar_remain[0]; /* minimum size, normally bigger */ |
#define ar_sha(ap) (((ap)->ar_remain)+0) |
#define ar_spa(ap) (((ap)->ar_remain)+(ap)->ar_hln) |
#define ar_tha(ap) (((ap)->ar_remain)+(ap)->ar_hln+(ap)->ar_pln) |
#define ar_tpa(ap) (((ap)->ar_remain)+2*(ap)->ar_hln+(ap)->ar_pln) |
#else |
#define ar_sha(ap) (((ap)->ar_op)+2) |
#define ar_spa(ap) (((ap)->ar_op)+2+(ap)->ar_hln) |
#define ar_tha(ap) (((ap)->ar_op)+2+(ap)->ar_hln+(ap)->ar_pln) |
#define ar_tpa(ap) (((ap)->ar_op)+2+2*(ap)->ar_hln+(ap)->ar_pln) |
#endif |
}; |
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/* |
* ARP ioctl request |
*/ |
struct arpreq { |
struct sockaddr arp_pa; /* protocol address */ |
struct sockaddr arp_ha; /* hardware address */ |
int arp_flags; /* flags */ |
}; |
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#include <sys/packoff.h> |
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/* arp_flags and at_flags field values */ |
#define ATF_INUSE 0x01 /* entry in use */ |
#define ATF_COM 0x02 /* completed entry (enaddr valid) */ |
#define ATF_PERM 0x04 /* permanent entry */ |
#define ATF_PUBL 0x08 /* publish entry (respond for other host) */ |
#define ATF_USETRAILERS 0x10 /* has requested trailers */ |
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#endif |