160 lines
5.5 KiB
C
160 lines
5.5 KiB
C
/* $OpenBSD: nd6.h,v 1.99 2023/05/04 06:56:56 bluhm Exp $ */
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/* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* 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 project 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 PROJECT 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 PROJECT 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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#ifndef _NETINET6_ND6_H_
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#define _NETINET6_ND6_H_
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#include <sys/task.h>
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#define ND6_LLINFO_PURGE -3
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#define ND6_LLINFO_NOSTATE -2
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#define ND6_LLINFO_INCOMPLETE 0
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#define ND6_LLINFO_REACHABLE 1
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#define ND6_LLINFO_STALE 2
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#define ND6_LLINFO_DELAY 3
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#define ND6_LLINFO_PROBE 4
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/*
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* Locks used to protect struct members in this file:
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* I immutable after creation
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* K kernel lock
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* m nd6 mutex, needed when net lock is shared
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* N net lock
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*/
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struct nd_ifinfo {
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u_int32_t reachable; /* [N] Reachable Time */
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int recalctm; /* [N] BaseReachable recalc timer */
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};
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struct in6_nbrinfo {
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char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct in6_addr addr; /* IPv6 address of the neighbor */
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time_t expire; /* lifetime for NDP state transition */
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long asked; /* number of queries already sent for addr */
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int isrouter; /* if it acts as a router */
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int state; /* reachability state */
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};
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struct in6_ndireq {
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char ifname[IFNAMSIZ];
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struct nd_ifinfo ndi;
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};
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/* protocol constants */
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#define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/
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#define RTR_SOLICITATION_INTERVAL 4 /*4sec*/
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#define MAX_RTR_SOLICITATIONS 3
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#define ND6_INFINITE_LIFETIME 0xffffffff
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#ifdef _KERNEL
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#include <sys/queue.h>
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struct llinfo_nd6 {
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TAILQ_ENTRY(llinfo_nd6) ln_list; /* [mN] global nd6_list */
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struct rtentry *ln_rt; /* [I] backpointer to rtentry */
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struct mbuf_queue ln_mq; /* hold packets until resolved */
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struct in6_addr ln_saddr6; /* source of prompting packet */
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long ln_asked; /* number of queries already sent for addr */
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int ln_byhint; /* # of times we made it reachable by UL hint */
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short ln_state; /* reachability state */
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short ln_router; /* 2^0: ND6 router bit */
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};
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#define LN_HOLD_QUEUE 10
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#define LN_HOLD_TOTAL 100
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extern unsigned int ln_hold_total;
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#define ND6_LLINFO_PERMANENT(n) ((n)->ln_rt->rt_expire == 0)
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/* node constants */
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#define REACHABLE_TIME 30000 /* msec */
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#define RETRANS_TIMER 1000 /* msec */
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#define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
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#define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
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#define ND_COMPUTE_RTIME(x) \
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(((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
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((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
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extern int nd6_delay;
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extern int nd6_umaxtries;
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extern int nd6_mmaxtries;
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extern int nd6_maxnudhint;
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extern int nd6_gctimer;
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extern int nd6_debug;
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#define nd6log(x) do { if (nd6_debug) log x; } while (0)
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struct nd_opts {
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struct nd_opt_hdr *nd_opts_src_lladdr;
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struct nd_opt_hdr *nd_opts_tgt_lladdr;
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};
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void nd6_init(void);
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void nd6_ifattach(struct ifnet *);
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void nd6_ifdetach(struct ifnet *);
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int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
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int nd6_options(void *, int, struct nd_opts *);
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struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *,
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u_int);
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void nd6_llinfo_settimer(const struct llinfo_nd6 *, unsigned int);
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void nd6_purge(struct ifnet *);
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void nd6_nud_hint(struct rtentry *);
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void nd6_rtrequest(struct ifnet *, int, struct rtentry *);
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int nd6_ioctl(u_long, caddr_t, struct ifnet *);
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void nd6_cache_lladdr(struct ifnet *, const struct in6_addr *, char *,
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int, int, int);
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int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
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struct sockaddr *, u_char *);
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int nd6_need_cache(struct ifnet *);
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void nd6_na_input(struct mbuf *, int, int);
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void nd6_na_output(struct ifnet *, const struct in6_addr *,
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const struct in6_addr *, u_long, int, struct sockaddr *);
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void nd6_ns_input(struct mbuf *, int, int);
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void nd6_ns_output(struct ifnet *, const struct in6_addr *,
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const struct in6_addr *, const struct in6_addr *, int);
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caddr_t nd6_ifptomac(struct ifnet *);
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void nd6_dad_start(struct ifaddr *);
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void nd6_dad_stop(struct ifaddr *);
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void nd6_rtr_cache(struct mbuf *, int, int, int);
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int rt6_flush(struct in6_addr *, struct ifnet *);
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void nd6_expire_timer_update(struct in6_ifaddr *);
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#endif /* _KERNEL */
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#endif /* _NETINET6_ND6_H_ */
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