1/*	$NetBSD: if_inarp.h,v 1.53 2022/09/03 01:35:03 thorpej Exp $	*/
 2
 3/*
 4 * Copyright (c) 1982, 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_ether.h	8.1 (Berkeley) 6/10/93
32 */
33
34#ifndef _NETINET_IF_INARP_H_
35#define _NETINET_IF_INARP_H_
36
37#include <sys/queue.h>		/* for LIST_ENTRY */
38#include <netinet/in.h>		/* for struct in_addr */
39
40struct llinfo_arp {
41	LIST_ENTRY(llinfo_arp) la_list;
42	struct	rtentry *la_rt;
43	struct	mbuf *la_hold;		/* last packet until resolved/timeout */
44	long	la_asked;		/* last time we QUERIED for this addr */
45};
46
47struct sockaddr_inarp {
48	u_int8_t  sin_len;
49	u_int8_t  sin_family;
50	u_int16_t sin_port;
51	struct	  in_addr sin_addr;
52	struct	  in_addr sin_srcaddr;
53	u_int16_t sin_tos;
54	u_int16_t sin_other;
55#define SIN_PROXY 1
56};
57
58#ifdef _KERNEL
59
60#include <net/pktqueue.h>
61
62/* ARP timings from RFC5227 */
63#define PROBE_WAIT               1
64#define PROBE_NUM                3
65#define PROBE_MIN                1
66#define PROBE_MAX                2
67#define ANNOUNCE_WAIT            2
68#define ANNOUNCE_NUM             2
69#define ANNOUNCE_INTERVAL        2
70#define MAX_CONFLICTS           10
71#define RATE_LIMIT_INTERVAL     60
72#define DEFEND_INTERVAL         10
73
74extern pktqueue_t *arp_pktq;
75void arp_ifinit(struct ifnet *, struct ifaddr *);
76void arp_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
77int arpresolve(struct ifnet *, const struct rtentry *, struct mbuf *,
78    const struct sockaddr *, void *, size_t);
79void arpintr(void *);
80void arpannounce(struct ifnet *, struct ifaddr *, const uint8_t *);
81struct llentry *arplookup(struct ifnet *,
82    const struct in_addr *, const struct sockaddr *, int);
83void arp_drain(void);
84int arpioctl(u_long, void *);
85void arpwhohas(struct ifnet *, struct in_addr *);
86void arp_nud_hint(struct rtentry *);
87
88void revarpinput(struct mbuf *);
89int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
90#endif
91
92#endif /* !_NETINET_IF_INARP_H_ */