nataraid(4): Add devstat support.
[dragonfly.git] / sys / net / if_arp.h
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1/*
2 * Copyright (c) 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if_arp.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/net/if_arp.h,v 1.14.2.3 2002/02/20 23:34:09 fjoe Exp $
4590c6ca 35 * $DragonFly: src/sys/net/if_arp.h,v 1.9 2008/11/24 12:19:14 hasso Exp $
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36 */
37
38#ifndef _NET_IF_ARP_H_
39#define _NET_IF_ARP_H_
40
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41#ifndef _SYS_TYPES_H_
42#include <sys/types.h>
43#endif
44#ifndef _SYS_SOCKET_H_
45#include <sys/socket.h>
46#endif
1bd40720 47
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48/*
49 * Address Resolution Protocol.
50 *
51 * See RFC 826 for protocol description. ARP packets are variable
52 * in size; the arphdr structure defines the fixed-length portion.
53 * Protocol type values are the same as those for 10 Mb/s Ethernet.
54 * It is followed by the variable-sized fields ar_sha, arp_spa,
55 * arp_tha and arp_tpa in that order, according to the lengths
56 * specified. Field names used correspond to RFC 826.
57 */
58struct arphdr {
59 u_short ar_hrd; /* format of hardware address */
f23061d4 60#define ARPHRD_ETHER 1 /* ethernet hardware format */
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61#define ARPHRD_IEEE802 6 /* token-ring hardware format */
62#define ARPHRD_ARCNET 7 /* arcnet hardware format */
f23061d4 63#define ARPHRD_FRELAY 15 /* frame relay hardware format */
4590c6ca 64#define ARPHRD_IEEE1394 24 /* firewire hardware format */
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65 u_short ar_pro; /* format of protocol address */
66 u_char ar_hln; /* length of hardware address */
67 u_char ar_pln; /* length of protocol address */
68 u_short ar_op; /* one of: */
69#define ARPOP_REQUEST 1 /* request to resolve address */
70#define ARPOP_REPLY 2 /* response to previous request */
71#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */
72#define ARPOP_REVREPLY 4 /* response giving protocol address */
f23061d4 73#define ARPOP_INVREQUEST 8 /* request to identify peer */
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74#define ARPOP_INVREPLY 9 /* response identifying peer */
75/*
76 * The remaining fields are variable in size,
77 * according to the sizes above.
78 */
79#ifdef COMMENT_ONLY
80 u_char ar_sha[]; /* sender hardware address */
81 u_char ar_spa[]; /* sender protocol address */
82 u_char ar_tha[]; /* target hardware address */
83 u_char ar_tpa[]; /* target protocol address */
84#endif
85};
86
87#define ar_sha(ap) (((caddr_t)((ap)+1)) + 0)
88#define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln)
89#define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln)
90#define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln)
91
92#define arphdr_len2(ar_hln, ar_pln) \
93 (sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln))
94#define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln))
95
96/*
97 * ARP ioctl request
98 */
99struct arpreq {
100 struct sockaddr arp_pa; /* protocol address */
101 struct sockaddr arp_ha; /* hardware address */
102 int arp_flags; /* flags */
103};
104/* arp_flags and at_flags field values */
105#define ATF_INUSE 0x01 /* entry in use */
106#define ATF_COM 0x02 /* completed entry (enaddr valid) */
107#define ATF_PERM 0x04 /* permanent entry */
108#define ATF_PUBL 0x08 /* publish entry (respond for other host) */
109#define ATF_USETRAILERS 0x10 /* has requested trailers */
110
ec12abe0 111#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
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112#ifndef _NET_IF_VAR_H_
113#include <net/if_var.h>
114#endif
ec12abe0 115
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116/*
117 * Structure shared between the ethernet driver modules and
118 * the address resolution code. For example, each ec_softc or il_softc
119 * begins with this structure.
120 */
121struct arpcom {
122 /*
123 * The ifnet struct _must_ be at the head of this structure.
124 */
f23061d4 125 struct ifnet ac_if; /* network-visible interface */
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126 u_char ac_enaddr[6]; /* ethernet hardware address */
127 int ac_multicnt; /* length of ac_multiaddrs list */
128 void *ac_netgraph; /* ng_ether(4) netgraph node info */
129};
130
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131#endif
132
984263bc 133#endif /* !_NET_IF_ARP_H_ */