| 207 |
mateuszvis |
1 |
/*!\file net/if_arp.h
|
|
|
2 |
* ARP definitions.
|
|
|
3 |
*/
|
|
|
4 |
|
|
|
5 |
/* $NetBSD: if_arp.h,v 1.12 1997/09/08 02:06:30 mikel Exp $ */
|
|
|
6 |
|
|
|
7 |
/*
|
|
|
8 |
* Copyright (c) 1986, 1993
|
|
|
9 |
* The Regents of the University of California. All rights reserved.
|
|
|
10 |
*
|
|
|
11 |
* Redistribution and use in source and binary forms, with or without
|
|
|
12 |
* modification, are permitted provided that the following conditions
|
|
|
13 |
* are met:
|
|
|
14 |
* 1. Redistributions of source code must retain the above copyright
|
|
|
15 |
* notice, this list of conditions and the following disclaimer.
|
|
|
16 |
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
17 |
* notice, this list of conditions and the following disclaimer in the
|
|
|
18 |
* documentation and/or other materials provided with the distribution.
|
|
|
19 |
* 3. All advertising materials mentioning features or use of this software
|
|
|
20 |
* must display the following acknowledgement:
|
|
|
21 |
* This product includes software developed by the University of
|
|
|
22 |
* California, Berkeley and its contributors.
|
|
|
23 |
* 4. Neither the name of the University nor the names of its contributors
|
|
|
24 |
* may be used to endorse or promote products derived from this software
|
|
|
25 |
* without specific prior written permission.
|
|
|
26 |
*
|
|
|
27 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
|
28 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
29 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
30 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
|
31 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
32 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
33 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
34 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
35 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
36 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
37 |
* SUCH DAMAGE.
|
|
|
38 |
*
|
|
|
39 |
* @(#)if_arp.h 8.1 (Berkeley) 6/10/93
|
|
|
40 |
*/
|
|
|
41 |
|
|
|
42 |
#ifndef __NET_IF_ARP_H
|
|
|
43 |
#define __NET_IF_ARP_H
|
|
|
44 |
/*
|
|
|
45 |
* Address Resolution Protocol.
|
|
|
46 |
*
|
|
|
47 |
* See RFC 826 for protocol description. ARP packets are variable
|
|
|
48 |
* in size; the arphdr structure defines the fixed-length portion.
|
|
|
49 |
* Protocol type values are the same as those for 10 Mb/s Ethernet.
|
|
|
50 |
* It is followed by the variable-sized fields ar_sha, arp_spa,
|
|
|
51 |
* arp_tha and arp_tpa in that order, according to the lengths
|
|
|
52 |
* specified. Field names used correspond to RFC 826.
|
|
|
53 |
*/
|
|
|
54 |
|
|
|
55 |
#include <sys/packon.h>
|
|
|
56 |
|
|
|
57 |
struct arphdr {
|
|
|
58 |
u_int16_t ar_hrd; /* format of hardware address */
|
|
|
59 |
#define ARPHRD_ETHER 1 /* ethernet hardware format */
|
|
|
60 |
#define ARPHRD_TOKEN 6 /* TokenRing hardware format */
|
|
|
61 |
#define ARPHRD_ARCNET 7 /* ethernet hardware format */
|
|
|
62 |
#define ARPHRD_FRELAY 15 /* frame relay hardware format */
|
|
|
63 |
#define ARPHRD_STRIP 23 /* Ricochet Starmode Radio hardware format */
|
|
|
64 |
u_int16_t ar_pro; /* format of protocol address */
|
|
|
65 |
u_int8_t ar_hln; /* length of hardware address */
|
|
|
66 |
u_int8_t ar_pln; /* length of protocol address */
|
|
|
67 |
u_int16_t ar_op; /* one of: */
|
|
|
68 |
#define ARPOP_REQUEST 1 /* request to resolve address */
|
|
|
69 |
#define ARPOP_REPLY 2 /* response to previous request */
|
|
|
70 |
#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */
|
|
|
71 |
#define ARPOP_REVREPLY 4 /* response giving protocol address */
|
|
|
72 |
#define ARPOP_INVREQUEST 8 /* request to identify peer */
|
|
|
73 |
#define ARPOP_INVREPLY 9 /* response identifying peer */
|
|
|
74 |
/*
|
|
|
75 |
* The remaining fields are variable in size,
|
|
|
76 |
* according to the sizes above.
|
|
|
77 |
*/
|
|
|
78 |
#ifdef COMMENT_ONLY
|
|
|
79 |
u_int8_t ar_sha[]; /* sender hardware address */
|
|
|
80 |
u_int8_t ar_spa[]; /* sender protocol address */
|
|
|
81 |
u_int8_t ar_tha[]; /* target hardware address */
|
|
|
82 |
u_int8_t ar_tpa[]; /* target protocol address */
|
|
|
83 |
#endif
|
|
|
84 |
#ifdef __GNUC__ /* only GNU C allows zero arrays */
|
|
|
85 |
u_int8_t ar_remain[0]; /* minimum size, normally bigger */
|
|
|
86 |
#define ar_sha(ap) (((ap)->ar_remain)+0)
|
|
|
87 |
#define ar_spa(ap) (((ap)->ar_remain)+(ap)->ar_hln)
|
|
|
88 |
#define ar_tha(ap) (((ap)->ar_remain)+(ap)->ar_hln+(ap)->ar_pln)
|
|
|
89 |
#define ar_tpa(ap) (((ap)->ar_remain)+2*(ap)->ar_hln+(ap)->ar_pln)
|
|
|
90 |
#else
|
|
|
91 |
#define ar_sha(ap) (((ap)->ar_op)+2)
|
|
|
92 |
#define ar_spa(ap) (((ap)->ar_op)+2+(ap)->ar_hln)
|
|
|
93 |
#define ar_tha(ap) (((ap)->ar_op)+2+(ap)->ar_hln+(ap)->ar_pln)
|
|
|
94 |
#define ar_tpa(ap) (((ap)->ar_op)+2+2*(ap)->ar_hln+(ap)->ar_pln)
|
|
|
95 |
#endif
|
|
|
96 |
};
|
|
|
97 |
|
|
|
98 |
|
|
|
99 |
/*
|
|
|
100 |
* ARP ioctl request
|
|
|
101 |
*/
|
|
|
102 |
struct arpreq {
|
|
|
103 |
struct sockaddr arp_pa; /* protocol address */
|
|
|
104 |
struct sockaddr arp_ha; /* hardware address */
|
|
|
105 |
int arp_flags; /* flags */
|
|
|
106 |
};
|
|
|
107 |
|
|
|
108 |
#include <sys/packoff.h>
|
|
|
109 |
|
|
|
110 |
/* arp_flags and at_flags field values */
|
|
|
111 |
#define ATF_INUSE 0x01 /* entry in use */
|
|
|
112 |
#define ATF_COM 0x02 /* completed entry (enaddr valid) */
|
|
|
113 |
#define ATF_PERM 0x04 /* permanent entry */
|
|
|
114 |
#define ATF_PUBL 0x08 /* publish entry (respond for other host) */
|
|
|
115 |
#define ATF_USETRAILERS 0x10 /* has requested trailers */
|
|
|
116 |
|
|
|
117 |
#endif
|