/*      $NetBSD: if_inarp.h,v 1.53 2022/09/03 01:35:03 thorpej Exp $    */

/*
* Copyright (c) 1982, 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. 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_ether.h  8.1 (Berkeley) 6/10/93
*/

#ifndef _NETINET_IF_INARP_H_
#define _NETINET_IF_INARP_H_

#include <sys/queue.h>          /* for LIST_ENTRY */
#include <netinet/in.h>         /* for struct in_addr */

struct llinfo_arp {
       LIST_ENTRY(llinfo_arp) la_list;
       struct  rtentry *la_rt;
       struct  mbuf *la_hold;          /* last packet until resolved/timeout */
       long    la_asked;               /* last time we QUERIED for this addr */
};

struct sockaddr_inarp {
       u_int8_t  sin_len;
       u_int8_t  sin_family;
       u_int16_t sin_port;
       struct    in_addr sin_addr;
       struct    in_addr sin_srcaddr;
       u_int16_t sin_tos;
       u_int16_t sin_other;
#define SIN_PROXY 1
};

#ifdef _KERNEL

#include <net/pktqueue.h>

/* ARP timings from RFC5227 */
#define PROBE_WAIT               1
#define PROBE_NUM                3
#define PROBE_MIN                1
#define PROBE_MAX                2
#define ANNOUNCE_WAIT            2
#define ANNOUNCE_NUM             2
#define ANNOUNCE_INTERVAL        2
#define MAX_CONFLICTS           10
#define RATE_LIMIT_INTERVAL     60
#define DEFEND_INTERVAL         10

extern pktqueue_t *arp_pktq;
void arp_ifinit(struct ifnet *, struct ifaddr *);
void arp_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
int arpresolve(struct ifnet *, const struct rtentry *, struct mbuf *,
   const struct sockaddr *, void *, size_t);
void arpintr(void *);
void arpannounce(struct ifnet *, struct ifaddr *, const uint8_t *);
struct llentry *arplookup(struct ifnet *,
   const struct in_addr *, const struct sockaddr *, int);
void arp_drain(void);
int arpioctl(u_long, void *);
void arpwhohas(struct ifnet *, struct in_addr *);
void arp_nud_hint(struct rtentry *);

void revarpinput(struct mbuf *);
int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
#endif

#endif /* !_NETINET_IF_INARP_H_ */