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/* $NetBSD: nd6.h,v 1.91 2020/09/11 15:03:33 roy 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_
#include <sys/queue.h>
#include <sys/callout.h>
#ifndef _KERNEL
/* Backwards compat */
#include <net/nd.h>
#define ND6_LLINFO_PURGE ND_LLINFO_PURGE
#define ND6_LLINFO_NOSTATE ND_LLINFO_NOSTATE
#define ND6_LLINFO_WAITDELETE ND_LLINFO_WAITDELETE
#define ND6_LLINFO_INCOMPLETE ND_LLINFO_INCOMPLETE
#define ND6_LLINFO_REACHABLE ND_LLINFO_REACHABLE
#define ND6_LLINFO_STALE ND_LLINFO_STALE
#define ND6_LLINFO_DELAY ND_LLINFO_DELAY
#define ND6_LLINFO_PROBE ND_LLINFO_PROBE
#endif
struct nd_ifinfo {
uint8_t chlim; /* CurHopLimit */
uint32_t basereachable; /* BaseReachableTime */
uint32_t retrans; /* Retrans Timer */
uint32_t flags; /* Flags */
};
#ifdef _KERNEL
struct nd_kifinfo {
uint8_t chlim; /* CurHopLimit */
uint32_t basereachable; /* BaseReachableTime */
uint32_t retrans; /* Retrans Timer */
uint32_t flags; /* Flags */
int recalctm; /* BaseReacable re-calculation timer */
uint32_t reachable; /* Reachable Time */
};
#endif
#define ND6_IFF_PERFORMNUD 0x01
/* 0x02 was ND6_IFF_ACCEPT_RTADV */
#define ND6_IFF_PREFER_SOURCE 0x04 /* XXX: not related to ND. */
#define ND6_IFF_IFDISABLED 0x08 /* IPv6 operation is disabled due to
* DAD failure. (XXX: not ND-specific)
*/
/* 0x10 was ND6_IFF_OVERRIDE_RTADV */
#define ND6_IFF_AUTO_LINKLOCAL 0x20
#ifdef _KERNEL
#define ND_IFINFO(ifp) \
(((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
#endif
struct in6_nbrinfo {
char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
struct in6_addr addr; /* IPv6 address of the neighbor */
long asked; /* number of queries already sent for this addr */
int isrouter; /* if it acts as a router */
int state; /* reachability state */
int expire; /* lifetime for NDP state transition */
};
struct in6_ndireq {
char ifname[IFNAMSIZ];
struct nd_ifinfo ndi;
};
/* protocol constants */
#define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
#define ND6_INFINITE_LIFETIME ((u_int32_t)~0)
#ifdef _KERNEL
#include <sys/mallocvar.h>
MALLOC_DECLARE(M_IP6NDP);
/* nd6.c */
extern int nd6_prune;
extern int nd6_useloopback;
extern int nd6_debug;
extern struct nd_domain nd6_nd_domain;
#define nd6log(level, fmt, args...) \
do { if (nd6_debug) log(level, "%s: " fmt, __func__, ##args);} while (0)
extern krwlock_t nd6_lock;
#define ND6_RLOCK() rw_enter(&nd6_lock, RW_READER)
#define ND6_WLOCK() rw_enter(&nd6_lock, RW_WRITER)
#define ND6_UNLOCK() rw_exit(&nd6_lock)
#define ND6_ASSERT_WLOCK() KASSERT(rw_write_held(&nd6_lock))
#define ND6_ASSERT_LOCK() KASSERT(rw_lock_held(&nd6_lock))
union nd_opts {
struct nd_opt_hdr *nd_opt_array[16]; /* max = ND_OPT_NONCE */
struct {
struct nd_opt_hdr *zero;
struct nd_opt_hdr *src_lladdr;
struct nd_opt_hdr *tgt_lladdr;
struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
struct nd_opt_rd_hdr *rh;
struct nd_opt_mtu *mtu;
struct nd_opt_hdr *__res6;
struct nd_opt_hdr *__res7;
struct nd_opt_hdr *__res8;
struct nd_opt_hdr *__res9;
struct nd_opt_hdr *__res10;
struct nd_opt_hdr *__res11;
struct nd_opt_hdr *__res12;
struct nd_opt_hdr *__res13;
struct nd_opt_nonce *nonce;
struct nd_opt_hdr *__res15;
struct nd_opt_hdr *search; /* multiple opts */
struct nd_opt_hdr *last; /* multiple opts */
int done;
struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
} nd_opt_each;
};
#define nd_opts_src_lladdr nd_opt_each.src_lladdr
#define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
#define nd_opts_pi nd_opt_each.pi_beg
#define nd_opts_pi_end nd_opt_each.pi_end
#define nd_opts_rh nd_opt_each.rh
#define nd_opts_mtu nd_opt_each.mtu
#define nd_opts_nonce nd_opt_each.nonce
#define nd_opts_search nd_opt_each.search
#define nd_opts_last nd_opt_each.last
#define nd_opts_done nd_opt_each.done
#include <net/if_llatbl.h>
/* XXX: need nd6_var.h?? */
/* nd6.c */
void nd6_init(void);
void nd6_nbr_init(void);
struct nd_kifinfo *nd6_ifattach(struct ifnet *);
void nd6_ifdetach(struct ifnet *, struct in6_ifextra *);
int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
void nd6_option_init(void *, int, union nd_opts *);
int nd6_options(union nd_opts *);
struct llentry *nd6_lookup(const struct in6_addr *, const struct ifnet *, bool);
struct llentry *nd6_create(const struct in6_addr *, const struct ifnet *);
void nd6_purge(struct ifnet *, struct in6_ifextra *);
void nd6_nud_hint(struct rtentry *);
int nd6_resolve(struct ifnet *, const struct rtentry *, struct mbuf *,
const struct sockaddr *, uint8_t *, size_t);
void nd6_rtrequest(int, struct rtentry *, const struct rt_addrinfo *);
int nd6_ioctl(u_long, void *, struct ifnet *);
void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
char *, int, int, int);
int nd6_sysctl(int, void *, size_t *, void *, size_t);
int nd6_need_cache(struct ifnet *);
void nd6_llinfo_release_pkts(struct llentry *, struct ifnet *);
/* nd6_nbr.c */
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, const 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 *, const uint8_t *);
const void *nd6_ifptomac(const struct ifnet *);
void nd6_dad_start(struct ifaddr *, int);
void nd6_dad_stop(struct ifaddr *);
/* nd6_rtr.c */
void nd6_rtr_cache(struct mbuf *, int, int, int);
#endif /* _KERNEL */
#endif /* !_NETINET6_ND6_H_ */
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