caccb5729a
This brings the benefit of Neighbour Unreachability Detection which is something ARP sorely lacks. The new timings mirror those of IPv6 and are adjustable via sysctl(8). Unlike IPv6 ND, these are global and not per interface.
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/* $NetBSD: if_inarp.h,v 1.52 2020/09/11 15:16:00 roy Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ether.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IF_INARP_H_
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#define _NETINET_IF_INARP_H_
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#include <sys/queue.h> /* for LIST_ENTRY */
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#include <netinet/in.h> /* for struct in_addr */
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struct llinfo_arp {
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LIST_ENTRY(llinfo_arp) la_list;
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struct rtentry *la_rt;
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struct mbuf *la_hold; /* last packet until resolved/timeout */
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long la_asked; /* last time we QUERIED for this addr */
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};
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struct sockaddr_inarp {
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u_int8_t sin_len;
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u_int8_t sin_family;
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u_int16_t sin_port;
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struct in_addr sin_addr;
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struct in_addr sin_srcaddr;
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u_int16_t sin_tos;
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u_int16_t sin_other;
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#define SIN_PROXY 1
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};
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#ifdef _KERNEL
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/* ARP timings from RFC5227 */
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#define PROBE_WAIT 1
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#define PROBE_NUM 3
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#define PROBE_MIN 1
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#define PROBE_MAX 2
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#define ANNOUNCE_WAIT 2
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#define ANNOUNCE_NUM 2
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#define ANNOUNCE_INTERVAL 2
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#define MAX_CONFLICTS 10
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#define RATE_LIMIT_INTERVAL 60
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#define DEFEND_INTERVAL 10
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extern struct ifqueue arpintrq;
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void arp_ifinit(struct ifnet *, struct ifaddr *);
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void arp_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
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int arpresolve(struct ifnet *, const struct rtentry *, struct mbuf *,
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const struct sockaddr *, void *, size_t);
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void arpintr(void);
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void arpannounce(struct ifnet *, struct ifaddr *, const uint8_t *);
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struct llentry *arplookup(struct ifnet *,
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const struct in_addr *, const struct sockaddr *, int);
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void arp_drain(void);
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int arpioctl(u_long, void *);
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void arpwhohas(struct ifnet *, struct in_addr *);
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void arp_nud_hint(struct rtentry *);
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void revarpinput(struct mbuf *);
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int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
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#endif
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#endif /* !_NETINET_IF_INARP_H_ */
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