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NetBSD/sys/netinet6/nd6.h

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/* $NetBSD: nd6.h,v 1.85 2017/06/22 09:24:02 ozaki-r 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>
#define ND6_LLINFO_PURGE -3
#define ND6_LLINFO_NOSTATE -2
/*
* We don't need the WAITDELETE state any more, but we keep the definition
* in a comment line instead of removing it. This is necessary to avoid
* unintentionally reusing the value for another purpose, which might
* affect backward compatibility with old applications.
* (20000711 jinmei@kame.net)
*/
/* #define ND6_LLINFO_WAITDELETE -1 */
#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
#define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
#define ND6_LLINFO_PERMANENT(n) (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE))
struct nd_ifinfo {
u_int32_t linkmtu; /* LinkMTU */
u_int32_t maxmtu; /* Upper bound of LinkMTU */
u_int32_t basereachable; /* BaseReachableTime */
u_int32_t reachable; /* Reachable Time */
u_int32_t retrans; /* Retrans Timer */
u_int32_t flags; /* Flags */
int recalctm; /* BaseReacable re-calculation timer */
u_int8_t chlim; /* CurHopLimit */
u_int8_t initialized; /* Flag to see the entry is initialized */
/* the following 3 members are for privacy extension for addrconf */
u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */
u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
u_int8_t randomid[8]; /* current random ID */
};
#define ND6_IFF_PERFORMNUD 0x01
#define ND6_IFF_ACCEPT_RTADV 0x02 /* See "RTADV Key", below. */
#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)
*/
#define ND6_IFF_OVERRIDE_RTADV 0x10 /* See "RTADV Key", below. */
#define ND6_IFF_AUTO_LINKLOCAL 0x20
/*
* RTADV Key
*
* The flags ND6_IFF_ACCEPT_RTADV and ND6_IFF_OVERRIDE_RTADV form a
* tri-state variable. (There are actually four different states, but
* two of the states are functionally identical.)
*
* ND6_IFF_OVERRIDE_RTADV or 0: This interface does not accept
* Router Advertisements.
*
* ND6_IFF_OVERRIDE_RTADV|
* ND6_IFF_ACCEPT_RTADV: This interface accepts Router
* Advertisements regardless of the
* global setting, ip6_accept_rtadv.
*
* ND6_IFF_ACCEPT_RTADV: This interface follows the global setting,
* ip6_accept_rtadv. If ip6_accept_rtadv == 0,
* this interface does not accept Router
* Advertisements. If ip6_accept_rtadv != 0,
* this interface does accept them.
*/
#ifdef _KERNEL
#define ND_IFINFO(ifp) \
(((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
#define IN6_LINKMTU(ifp) \
((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
? ND_IFINFO(ifp)->linkmtu \
: ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
#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 */
};
#define DRLSTSIZ 10
#define PRLSTSIZ 10
struct in6_drlist {
char ifname[IFNAMSIZ];
struct {
struct in6_addr rtaddr;
u_char flags;
u_short rtlifetime;
u_long expire;
u_short if_index;
} defrouter[DRLSTSIZ];
};
struct in6_defrouter {
struct sockaddr_in6 rtaddr;
u_char flags;
u_short rtlifetime;
u_long expire;
u_short if_index;
};
#ifdef _KERNEL
struct in6_oprlist {
char ifname[IFNAMSIZ];
struct {
struct in6_addr prefix;
struct prf_ra raflags;
u_char prefixlen;
u_char origin;
u_long vltime;
u_long pltime;
u_long expire;
u_short if_index;
u_short advrtrs; /* number of advertisement routers */
struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
} prefix[PRLSTSIZ];
};
#endif
struct in6_prlist {
char ifname[IFNAMSIZ];
struct {
struct in6_addr prefix;
struct prf_ra raflags;
u_char prefixlen;
u_char origin;
u_int32_t vltime;
u_int32_t pltime;
time_t expire;
u_short if_index;
u_short advrtrs; /* number of advertisement routers */
struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
} prefix[PRLSTSIZ];
};
struct in6_prefix {
struct sockaddr_in6 prefix;
struct prf_ra raflags;
u_char prefixlen;
u_char origin;
u_int32_t vltime;
u_int32_t pltime;
time_t expire;
u_int32_t flags;
int refcnt;
u_short if_index;
u_short advrtrs; /* number of advertisement routers */
/* struct sockaddr_in6 advrtr[] */
};
#ifdef _KERNEL
struct in6_ondireq {
char ifname[IFNAMSIZ];
struct {
u_int32_t linkmtu; /* LinkMTU */
u_int32_t maxmtu; /* Upper bound of LinkMTU */
u_int32_t basereachable; /* BaseReachableTime */
u_int32_t reachable; /* Reachable Time */
u_int32_t retrans; /* Retrans Timer */
u_int32_t flags; /* Flags */
int recalctm; /* BaseReacable re-calculation timer */
u_int8_t chlim; /* CurHopLimit */
u_int8_t receivedra;
} ndi;
};
#endif
struct in6_ndireq {
char ifname[IFNAMSIZ];
struct nd_ifinfo ndi;
};
struct in6_ndifreq {
char ifname[IFNAMSIZ];
u_long ifindex;
};
/* Prefix status */
#define NDPRF_ONLINK 0x1
#define NDPRF_DETACHED 0x2
#define NDPRF_HOME 0x4
/* protocol constants */
#define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
#define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
#define MAX_RTR_SOLICITATIONS 3
#define ND6_INFINITE_LIFETIME ((u_int32_t)~0)
#ifdef _KERNEL
/* node constants */
#define MAX_REACHABLE_TIME 3600000 /* msec */
#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 DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
#define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
#define TEMPADDR_REGEN_ADVANCE 5 /* sec */
#define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
#define ND_COMPUTE_RTIME(x) \
(((MIN_RANDOM_FACTOR * (x >> 10)) + (cprng_fast32() & \
((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
TAILQ_HEAD(nd_drhead, nd_defrouter);
struct nd_defrouter {
TAILQ_ENTRY(nd_defrouter) dr_entry;
struct in6_addr rtaddr;
u_char flags; /* flags on RA message */
u_short rtlifetime;
u_long expire;
struct ifnet *ifp;
int installed; /* is installed into kernel routing table */
};
#define ND_DEFROUTER_LIST_INIT() \
TAILQ_INIT(&nd_defrouter)
#define ND_DEFROUTER_LIST_FOREACH(dr) \
TAILQ_FOREACH((dr), &nd_defrouter, dr_entry)
#define ND_DEFROUTER_LIST_FOREACH_SAFE(dr, dr_next) \
TAILQ_FOREACH_SAFE((dr), &nd_defrouter, dr_entry, (dr_next))
#define ND_DEFROUTER_LIST_EMPTY() \
TAILQ_EMPTY(&nd_defrouter)
#define ND_DEFROUTER_LIST_REMOVE(dr) \
TAILQ_REMOVE(&nd_defrouter, (dr), dr_entry)
#define ND_DEFROUTER_LIST_INSERT_BEFORE(dr, dr_new) \
TAILQ_INSERT_BEFORE((dr), (dr_new), dr_entry)
#define ND_DEFROUTER_LIST_INSERT_TAIL(dr) \
TAILQ_INSERT_TAIL(&nd_defrouter, (dr), dr_entry)
#define ND_DEFROUTER_LIST_FIRST() \
TAILQ_FIRST(&nd_defrouter)
#define ND_DEFROUTER_LIST_NEXT(dr) \
TAILQ_NEXT((dr), dr_entry)
struct nd_prefixctl {
struct ifnet *ndprc_ifp;
/* prefix */
struct sockaddr_in6 ndprc_prefix;
u_char ndprc_plen;
u_int32_t ndprc_vltime; /* advertised valid lifetime */
u_int32_t ndprc_pltime; /* advertised preferred lifetime */
struct prf_ra ndprc_flags;
};
#define ndprc_raf ndprc_flags
#define ndprc_raf_onlink ndprc_flags.onlink
#define ndprc_raf_auto ndprc_flags.autonomous
#define ndprc_raf_router ndprc_flags.router
struct nd_prefix {
struct ifnet *ndpr_ifp;
LIST_ENTRY(nd_prefix) ndpr_entry;
struct sockaddr_in6 ndpr_prefix; /* prefix */
struct in6_addr ndpr_mask; /* netmask derived from the prefix */
u_int32_t ndpr_vltime; /* advertised valid lifetime */
u_int32_t ndpr_pltime; /* advertised preferred lifetime */
time_t ndpr_expire; /* expiration time of the prefix */
time_t ndpr_preferred; /* preferred time of the prefix */
time_t ndpr_lastupdate; /* reception time of last advertisement */
struct prf_ra ndpr_flags;
u_int32_t ndpr_stateflags; /* actual state flags */
/* list of routers that advertise the prefix: */
LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
u_char ndpr_plen;
int ndpr_refcnt; /* reference couter from addresses */
};
#define ndpr_next ndpr_entry.le_next
#define ndpr_raf ndpr_flags
#define ndpr_raf_onlink ndpr_flags.onlink
#define ndpr_raf_auto ndpr_flags.autonomous
#define ndpr_raf_router ndpr_flags.router
#define ND_PREFIX_LIST_FOREACH(pr) \
LIST_FOREACH((pr), &nd_prefix, ndpr_entry)
#define ND_PREFIX_LIST_FOREACH_SAFE(pr, pr_next) \
LIST_FOREACH_SAFE((pr), &nd_prefix, ndpr_entry, (pr_next))
#define ND_PREFIX_LIST_REMOVE(pr) \
LIST_REMOVE((pr), ndpr_entry)
#define ND_PREFIX_LIST_INSERT_HEAD(pr) \
LIST_INSERT_HEAD(&nd_prefix, (pr), ndpr_entry)
/*
* Message format for use in obtaining information about prefixes
* from inet6 sysctl function
*/
struct inet6_ndpr_msghdr {
u_short inpm_msglen; /* to skip over non-understood messages */
u_char inpm_version; /* future binary compatibility */
u_char inpm_type; /* message type */
struct in6_addr inpm_prefix;
u_long prm_vltim;
u_long prm_pltime;
u_long prm_expire;
u_long prm_preferred;
struct in6_prflags prm_flags;
u_short prm_index; /* index for associated ifp */
u_char prm_plen; /* length of prefix in bits */
};
#define prm_raf_onlink prm_flags.prf_ra.onlink
#define prm_raf_auto prm_flags.prf_ra.autonomous
#define prm_statef_onlink prm_flags.prf_state.onlink
#define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid
#define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd
struct nd_pfxrouter {
LIST_ENTRY(nd_pfxrouter) pfr_entry;
struct nd_defrouter *router;
};
LIST_HEAD(nd_prhead, nd_prefix);
#include <sys/mallocvar.h>
MALLOC_DECLARE(M_IP6NDP);
/* nd6.c */
extern int nd6_prune;
extern int nd6_delay;
extern int nd6_umaxtries;
extern int nd6_mmaxtries;
extern int nd6_useloopback;
extern int nd6_maxnudhint;
extern int nd6_gctimer;
extern struct nd_drhead nd_defrouter;
extern struct nd_prhead nd_prefix;
extern int nd6_debug;
#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))
/* nd6_rtr.c */
extern int ip6_desync_factor; /* seconds */
extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
extern int ip6_temp_regen_advance; /* seconds */
extern int nd6_numroutes;
union nd_opts {
struct nd_opt_hdr *nd_opt_array[8];
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 *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_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);
struct nd_ifinfo *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_setmtu(struct ifnet *);
void nd6_llinfo_settimer(struct llentry *, time_t);
void nd6_purge(struct ifnet *, struct in6_ifextra *);
void nd6_assert_purged(struct ifnet *);
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 *, struct in6_addr *, int);
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_rs_input(struct mbuf *, int, int);
void nd6_ra_input(struct mbuf *, int, int);
void nd6_defrouter_reset(void);
void nd6_defrouter_select(void);
void nd6_defrtrlist_del(struct nd_defrouter *, struct in6_ifextra *);
void nd6_prefix_unref(struct nd_prefix *);
void nd6_prelist_remove(struct nd_prefix *);
void nd6_invalidate_prefix(struct nd_prefix *);
void nd6_pfxlist_onlink_check(void);
struct nd_defrouter *nd6_defrouter_lookup(const struct in6_addr *, struct ifnet *);
void nd6_rt_flush(struct in6_addr *, struct ifnet *);
int in6_tmpifadd(const struct in6_ifaddr *, int, int);
bool nd6_accepts_rtadv(const struct nd_ifinfo *);
#endif /* _KERNEL */
#endif /* !_NETINET6_ND6_H_ */
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