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      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 
     40 struct 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 
     47 struct 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 
     74 extern pktqueue_t *arp_pktq;
     75 void arp_ifinit(struct ifnet *, struct ifaddr *);
     76 void arp_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
     77 int arpresolve(struct ifnet *, const struct rtentry *, struct mbuf *,
     78     const struct sockaddr *, void *, size_t);
     79 void arpintr(void *);
     80 void arpannounce(struct ifnet *, struct ifaddr *, const uint8_t *);
     81 struct llentry *arplookup(struct ifnet *,
     82     const struct in_addr *, const struct sockaddr *, int);
     83 void arp_drain(void);
     84 int arpioctl(u_long, void *);
     85 void arpwhohas(struct ifnet *, struct in_addr *);
     86 void arp_nud_hint(struct rtentry *);
     87 
     88 void revarpinput(struct mbuf *);
     89 int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
     90 #endif
     91 
     92 #endif /* !_NETINET_IF_INARP_H_ */
     93