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/* $OpenBSD: nd6.h,v 1.101 2024/10/17 05:37:54 jsg Exp $ */
/* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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 project 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 PROJECT 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 PROJECT 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.
*/
#ifndef _NETINET6_ND6_H_
#define _NETINET6_ND6_H_
#define ND6_LLINFO_PURGE -3
#define ND6_LLINFO_NOSTATE -2
#define ND6_LLINFO_INCOMPLETE 0
#define ND6_LLINFO_REACHABLE 1
#define ND6_LLINFO_STALE 2
#define ND6_LLINFO_DELAY 3
#define ND6_LLINFO_PROBE 4
/*
* Locks used to protect struct members in this file:
* I immutable after creation
* K kernel lock
* m nd6 mutex, needed when net lock is shared
* N net lock
*/
struct nd_ifinfo {
u_int32_t reachable; /* [N] Reachable Time */
int recalctm; /* [N] BaseReachable recalc timer */
};
struct in6_nbrinfo {
char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
struct in6_addr addr; /* IPv6 address of the neighbor */
time_t expire; /* lifetime for NDP state transition */
long asked; /* number of queries already sent for addr */
int isrouter; /* if it acts as a router */
int state; /* reachability state */
};
struct in6_ndireq {
char ifname[IFNAMSIZ];
struct nd_ifinfo ndi;
};
/* protocol constants */
#define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/
#define RTR_SOLICITATION_INTERVAL 4 /*4sec*/
#define MAX_RTR_SOLICITATIONS 3
#define ND6_INFINITE_LIFETIME 0xffffffff
#ifdef _KERNEL
#include <sys/queue.h>
struct llinfo_nd6 {
TAILQ_ENTRY(llinfo_nd6) ln_list; /* [mN] global nd6_list */
struct rtentry *ln_rt; /* [I] backpointer to rtentry */
struct mbuf_queue ln_mq; /* hold packets until resolved */
struct in6_addr ln_saddr6; /* source of prompting packet */
long ln_asked; /* number of queries already sent for addr */
int ln_byhint; /* # of times we made it reachable by UL hint */
short ln_state; /* reachability state */
short ln_router; /* 2^0: ND6 router bit */
};
#define LN_HOLD_QUEUE 10
#define LN_HOLD_TOTAL 100
extern unsigned int ln_hold_total;
#define ND6_LLINFO_PERMANENT(n) ((n)->ln_rt->rt_expire == 0)
/* node constants */
#define REACHABLE_TIME 30000 /* msec */
#define RETRANS_TIMER 1000 /* msec */
#define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
#define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
#define ND_COMPUTE_RTIME(x) \
(((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
extern int nd6_delay;
extern int nd6_umaxtries;
extern int nd6_mmaxtries;
extern int nd6_maxnudhint;
extern int nd6_gctimer;
extern int nd6_debug;
#define nd6log(x) do { if (nd6_debug) log x; } while (0)
struct nd_opts {
struct nd_opt_hdr *nd_opts_src_lladdr;
struct nd_opt_hdr *nd_opts_tgt_lladdr;
};
void nd6_init(void);
void nd6_ifattach(struct ifnet *);
void nd6_ifdetach(struct ifnet *);
int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
int nd6_options(void *, int, struct nd_opts *);
struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *,
u_int);
void nd6_llinfo_settimer(const struct llinfo_nd6 *, unsigned int);
void nd6_purge(struct ifnet *);
void nd6_nud_hint(struct rtentry *);
void nd6_rtrequest(struct ifnet *, int, struct rtentry *);
int nd6_ioctl(u_long, caddr_t, struct ifnet *);
void nd6_cache_lladdr(struct ifnet *, const struct in6_addr *, char *,
int, int, int, int);
int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
struct sockaddr *, u_char *);
int nd6_need_cache(struct ifnet *);
void nd6_na_input(struct mbuf *, int, int);
void nd6_na_output(struct ifnet *, const struct in6_addr *,
const struct in6_addr *, u_long, int, struct sockaddr *);
void nd6_ns_input(struct mbuf *, int, int);
void nd6_ns_output(struct ifnet *, const struct in6_addr *,
const struct in6_addr *, const struct in6_addr *, int);
caddr_t nd6_ifptomac(struct ifnet *);
void nd6_dad_start(struct ifaddr *);
void nd6_dad_stop(struct ifaddr *);
void nd6_rtr_cache(struct mbuf *, int, int, int);
int rt6_flush(struct in6_addr *, struct ifnet *);
void nd6_expire_timer_update(struct in6_ifaddr *);
#endif /* _KERNEL */
#endif /* _NETINET6_ND6_H_ */
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