1 | /* $NetBSD: if_arp.h,v 1.30 2015/08/31 08:05:20 ozaki-r Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1986, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. Neither the name of the University nor the names of its contributors |
16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | * |
31 | * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 |
32 | */ |
33 | |
34 | #ifndef _NET_IF_ARP_H_ |
35 | #define _NET_IF_ARP_H_ |
36 | /* |
37 | * Address Resolution Protocol. |
38 | * |
39 | * See RFC 826 for protocol description. ARP packets are variable |
40 | * in size; the arphdr structure defines the fixed-length portion. |
41 | * Protocol type values are the same as those for 10 Mb/s Ethernet. |
42 | * It is followed by the variable-sized fields ar_sha, arp_spa, |
43 | * arp_tha and arp_tpa in that order, according to the lengths |
44 | * specified. Field names used correspond to RFC 826. |
45 | */ |
46 | struct arphdr { |
47 | uint16_t ar_hrd; /* format of hardware address */ |
48 | #define ARPHRD_ETHER 1 /* ethernet hardware format */ |
49 | #define ARPHRD_IEEE802 6 /* IEEE 802 hardware format */ |
50 | #define ARPHRD_ARCNET 7 /* ethernet hardware format */ |
51 | #define ARPHRD_FRELAY 15 /* frame relay hardware format */ |
52 | #define ARPHRD_STRIP 23 /* Ricochet Starmode Radio hardware format */ |
53 | #define ARPHRD_IEEE1394 24 /* IEEE 1394 (FireWire) hardware format */ |
54 | uint16_t ar_pro; /* format of protocol address */ |
55 | uint8_t ar_hln; /* length of hardware address */ |
56 | uint8_t ar_pln; /* length of protocol address */ |
57 | uint16_t ar_op; /* one of: */ |
58 | #define ARPOP_REQUEST 1 /* request to resolve address */ |
59 | #define ARPOP_REPLY 2 /* response to previous request */ |
60 | #define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ |
61 | #define ARPOP_REVREPLY 4 /* response giving protocol address */ |
62 | #define ARPOP_INVREQUEST 8 /* request to identify peer */ |
63 | #define ARPOP_INVREPLY 9 /* response identifying peer */ |
64 | /* |
65 | * The remaining fields are variable in size, |
66 | * according to the sizes above. |
67 | */ |
68 | #ifdef COMMENT_ONLY |
69 | uint8_t ar_sha[]; /* sender hardware address */ |
70 | uint8_t ar_spa[]; /* sender protocol address */ |
71 | uint8_t ar_tha[]; /* target hardware address */ |
72 | uint8_t ar_tpa[]; /* target protocol address */ |
73 | #endif |
74 | #define ar_sha(ap) (((char *)((ap)+1))+0) |
75 | #define ar_spa(ap) (((char *)((ap)+1))+(ap)->ar_hln) |
76 | #define ar_tha(ap) \ |
77 | (ntohs((ap)->ar_hrd) == ARPHRD_IEEE1394 \ |
78 | ? NULL : (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln)) |
79 | #define ar_tpa(ap) \ |
80 | (ntohs((ap)->ar_hrd) == ARPHRD_IEEE1394 \ |
81 | ? (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln) \ |
82 | : (((char *)((ap)+1))+(ap)->ar_hln+(ap)->ar_pln+(ap)->ar_hln)) |
83 | } __packed; |
84 | |
85 | |
86 | /* |
87 | * ARP ioctl request |
88 | */ |
89 | struct arpreq { |
90 | struct sockaddr arp_pa; /* protocol address */ |
91 | struct sockaddr arp_ha; /* hardware address */ |
92 | int arp_flags; /* flags */ |
93 | }; |
94 | /* arp_flags and at_flags field values */ |
95 | #define ATF_INUSE 0x01 /* entry in use */ |
96 | #define ATF_COM 0x02 /* completed entry (enaddr valid) */ |
97 | #define ATF_PERM 0x04 /* permanent entry */ |
98 | #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ |
99 | #define ATF_USETRAILERS 0x10 /* has requested trailers */ |
100 | |
101 | /* |
102 | * Kernel statistics about arp |
103 | */ |
104 | #define ARP_STAT_SNDTOTAL 0 /* total packets sent */ |
105 | #define ARP_STAT_SNDREPLY 1 /* replies sent */ |
106 | #define ARP_STAT_SENDREQUEST 2 /* requests sent */ |
107 | #define ARP_STAT_RCVTOTAL 3 /* total packets received */ |
108 | #define ARP_STAT_RCVREQUEST 4 /* valid requests received */ |
109 | #define ARP_STAT_RCVREPLY 5 /* replies received */ |
110 | #define ARP_STAT_RCVMCAST 6 /* multicast/broadcast received */ |
111 | #define ARP_STAT_RCVBADPROTO 7 /* unknown protocol type received */ |
112 | #define ARP_STAT_RCVBADLEN 8 /* bad (short) length received */ |
113 | #define ARP_STAT_RCVZEROTPA 9 /* received w/ null target ip */ |
114 | #define ARP_STAT_RCVZEROSPA 10 /* received w/ null source ip */ |
115 | #define ARP_STAT_RCVNOINT 11 /* couldn't map to interface */ |
116 | #define ARP_STAT_RCVLOCALSHA 12 /* received from local hw address */ |
117 | #define ARP_STAT_RCVBCASTSHA 13 /* received w/ broadcast src */ |
118 | #define ARP_STAT_RCVLOCALSPA 14 /* received for a local ip [dup!] */ |
119 | #define ARP_STAT_RCVOVERPERM 15 /* attempts to overwrite static info */ |
120 | #define ARP_STAT_RCVOVERINT 16 /* attempts to overwrite wrong if */ |
121 | #define ARP_STAT_RCVOVER 17 /* entries overwritten! */ |
122 | #define ARP_STAT_RCVLENCHG 18 /* changes in hw address len */ |
123 | #define ARP_STAT_DFRTOTAL 19 /* deferred pending ARP resolution */ |
124 | #define ARP_STAT_DFRSENT 20 /* deferred, then sent */ |
125 | #define ARP_STAT_DFRDROPPED 21 /* deferred, then dropped */ |
126 | #define ARP_STAT_ALLOCFAIL 22 /* failures to allocate llinfo */ |
127 | |
128 | #define ARP_NSTATS 23 |
129 | |
130 | void arp_stat_add(int, uint64_t); |
131 | |
132 | #endif /* !_NET_IF_ARP_H_ */ |
133 | |