The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/nd6.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the project nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $
   32  * $FreeBSD: head/sys/netinet6/nd6.h 344904 2019-03-07 23:03:39Z bz $
   33  */
   34 
   35 #ifndef _NETINET6_ND6_H_
   36 #define _NETINET6_ND6_H_
   37 
   38 /* see net/route.h, or net/if_inarp.h */
   39 #ifndef RTF_ANNOUNCE
   40 #define RTF_ANNOUNCE    RTF_PROTO2
   41 #endif
   42 
   43 #include <sys/queue.h>
   44 #include <sys/callout.h>
   45 
   46 struct llentry;
   47 
   48 #define ND6_LLINFO_NOSTATE      -2
   49 /*
   50  * We don't need the WAITDELETE state any more, but we keep the definition
   51  * in a comment line instead of removing it. This is necessary to avoid
   52  * unintentionally reusing the value for another purpose, which might
   53  * affect backward compatibility with old applications.
   54  * (20000711 jinmei@kame.net)
   55  */
   56 /* #define ND6_LLINFO_WAITDELETE        -1 */
   57 #define ND6_LLINFO_INCOMPLETE   0
   58 #define ND6_LLINFO_REACHABLE    1
   59 #define ND6_LLINFO_STALE        2
   60 #define ND6_LLINFO_DELAY        3
   61 #define ND6_LLINFO_PROBE        4
   62 
   63 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
   64 #define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE))
   65 
   66 struct nd_ifinfo {
   67         u_int32_t linkmtu;              /* LinkMTU */
   68         u_int32_t maxmtu;               /* Upper bound of LinkMTU */
   69         u_int32_t basereachable;        /* BaseReachableTime */
   70         u_int32_t reachable;            /* Reachable Time */
   71         u_int32_t retrans;              /* Retrans Timer */
   72         u_int32_t flags;                /* Flags */
   73         int recalctm;                   /* BaseReacable re-calculation timer */
   74         u_int8_t chlim;                 /* CurHopLimit */
   75         u_int8_t initialized; /* Flag to see the entry is initialized */
   76         /* the following 3 members are for privacy extension for addrconf */
   77         u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */
   78         u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
   79         u_int8_t randomid[8];   /* current random ID */
   80 };
   81 
   82 #define ND6_IFF_PERFORMNUD      0x1
   83 #define ND6_IFF_ACCEPT_RTADV    0x2
   84 #define ND6_IFF_PREFER_SOURCE   0x4 /* Not used in FreeBSD. */
   85 #define ND6_IFF_IFDISABLED      0x8 /* IPv6 operation is disabled due to
   86                                      * DAD failure.  (XXX: not ND-specific)
   87                                      */
   88 #define ND6_IFF_DONT_SET_IFROUTE        0x10
   89 #define ND6_IFF_AUTO_LINKLOCAL  0x20
   90 #define ND6_IFF_NO_RADR         0x40
   91 #define ND6_IFF_NO_PREFER_IFACE 0x80 /* XXX: not related to ND. */
   92 #define ND6_IFF_NO_DAD          0x100
   93 #ifdef EXPERIMENTAL
   94 /* XXX: not related to ND. */
   95 #define ND6_IFF_IPV6_ONLY       0x200 /* draft-ietf-6man-ipv6only-flag */
   96 #define ND6_IFF_IPV6_ONLY_MANUAL        0x400
   97 #define ND6_IFF_IPV6_ONLY_MASK  (ND6_IFF_IPV6_ONLY|ND6_IFF_IPV6_ONLY_MANUAL)
   98 #endif
   99 
  100 #ifdef _KERNEL
  101 #define ND_IFINFO(ifp) \
  102         (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
  103 #define IN6_LINKMTU(ifp) \
  104         ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
  105             ? ND_IFINFO(ifp)->linkmtu \
  106             : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
  107                 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
  108 #endif
  109 
  110 struct in6_nbrinfo {
  111         char ifname[IFNAMSIZ];  /* if name, e.g. "en0" */
  112         struct in6_addr addr;   /* IPv6 address of the neighbor */
  113         long    asked;          /* number of queries already sent for this addr */
  114         int     isrouter;       /* if it acts as a router */
  115         int     state;          /* reachability state */
  116         int     expire;         /* lifetime for NDP state transition */
  117 };
  118 
  119 #define DRLSTSIZ 10
  120 #define PRLSTSIZ 10
  121 struct  in6_drlist {
  122         char ifname[IFNAMSIZ];
  123         struct {
  124                 struct  in6_addr rtaddr;
  125                 u_char  flags;
  126                 u_short rtlifetime;
  127                 u_long  expire;
  128                 u_short if_index;
  129         } defrouter[DRLSTSIZ];
  130 };
  131 
  132 struct  in6_defrouter {
  133         struct  sockaddr_in6 rtaddr;
  134         u_char  flags;
  135         u_short rtlifetime;
  136         u_long  expire;
  137         u_short if_index;
  138 };
  139 
  140 #ifdef _KERNEL
  141 struct  in6_oprlist {
  142         char ifname[IFNAMSIZ];
  143         struct {
  144                 struct  in6_addr prefix;
  145                 struct prf_ra raflags;
  146                 u_char  prefixlen;
  147                 u_char  origin;
  148                 u_long vltime;
  149                 u_long pltime;
  150                 u_long expire;
  151                 u_short if_index;
  152                 u_short advrtrs; /* number of advertisement routers */
  153                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  154         } prefix[PRLSTSIZ];
  155 };
  156 #endif
  157 
  158 struct  in6_prlist {
  159         char ifname[IFNAMSIZ];
  160         struct {
  161                 struct  in6_addr prefix;
  162                 struct prf_ra raflags;
  163                 u_char  prefixlen;
  164                 u_char  origin;
  165                 u_int32_t vltime;
  166                 u_int32_t pltime;
  167                 time_t expire;
  168                 u_short if_index;
  169                 u_short advrtrs; /* number of advertisement routers */
  170                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  171         } prefix[PRLSTSIZ];
  172 };
  173 
  174 struct in6_prefix {
  175         struct  sockaddr_in6 prefix;
  176         struct prf_ra raflags;
  177         u_char  prefixlen;
  178         u_char  origin;
  179         u_int32_t vltime;
  180         u_int32_t pltime;
  181         time_t expire;
  182         u_int32_t flags;
  183         int refcnt;
  184         u_short if_index;
  185         u_short advrtrs; /* number of advertisement routers */
  186         /* struct sockaddr_in6 advrtr[] */
  187 };
  188 
  189 #ifdef _KERNEL
  190 struct  in6_ondireq {
  191         char ifname[IFNAMSIZ];
  192         struct {
  193                 u_int32_t linkmtu;      /* LinkMTU */
  194                 u_int32_t maxmtu;       /* Upper bound of LinkMTU */
  195                 u_int32_t basereachable; /* BaseReachableTime */
  196                 u_int32_t reachable;    /* Reachable Time */
  197                 u_int32_t retrans;      /* Retrans Timer */
  198                 u_int32_t flags;        /* Flags */
  199                 int recalctm;           /* BaseReacable re-calculation timer */
  200                 u_int8_t chlim;         /* CurHopLimit */
  201                 u_int8_t receivedra;
  202         } ndi;
  203 };
  204 #endif
  205 
  206 struct  in6_ndireq {
  207         char ifname[IFNAMSIZ];
  208         struct nd_ifinfo ndi;
  209 };
  210 
  211 struct  in6_ndifreq {
  212         char ifname[IFNAMSIZ];
  213         u_long ifindex;
  214 };
  215 
  216 /* Prefix status */
  217 #define NDPRF_ONLINK            0x1
  218 #define NDPRF_DETACHED          0x2
  219 
  220 /* protocol constants */
  221 #define MAX_RTR_SOLICITATION_DELAY      1       /* 1sec */
  222 #define RTR_SOLICITATION_INTERVAL       4       /* 4sec */
  223 #define MAX_RTR_SOLICITATIONS           3
  224 
  225 #define ND6_INFINITE_LIFETIME           0xffffffff
  226 
  227 #ifdef _KERNEL
  228 /* node constants */
  229 #define MAX_REACHABLE_TIME              3600000 /* msec */
  230 #define REACHABLE_TIME                  30000   /* msec */
  231 #define RETRANS_TIMER                   1000    /* msec */
  232 #define MIN_RANDOM_FACTOR               512     /* 1024 * 0.5 */
  233 #define MAX_RANDOM_FACTOR               1536    /* 1024 * 1.5 */
  234 #define DEF_TEMP_VALID_LIFETIME         604800  /* 1 week */
  235 #define DEF_TEMP_PREFERRED_LIFETIME     86400   /* 1 day */
  236 #define TEMPADDR_REGEN_ADVANCE          5       /* sec */
  237 #define MAX_TEMP_DESYNC_FACTOR          600     /* 10 min */
  238 #define ND_COMPUTE_RTIME(x) \
  239                 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
  240                 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
  241 
  242 TAILQ_HEAD(nd_drhead, nd_defrouter);
  243 struct nd_defrouter {
  244         TAILQ_ENTRY(nd_defrouter) dr_entry;
  245         struct in6_addr rtaddr;
  246         u_char  raflags;        /* flags on RA message */
  247         u_short rtlifetime;
  248         u_long  expire;
  249         struct ifnet *ifp;
  250         int     installed;      /* is installed into kernel routing table */
  251         u_int   refcnt;
  252 };
  253 
  254 struct nd_prefixctl {
  255         struct ifnet *ndpr_ifp;
  256 
  257         /* prefix */
  258         struct sockaddr_in6 ndpr_prefix;
  259         u_char  ndpr_plen;
  260 
  261         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  262         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  263 
  264         struct prf_ra ndpr_flags;
  265 };
  266 
  267 LIST_HEAD(nd_prhead, nd_prefix);
  268 struct nd_prefix {
  269         struct ifnet *ndpr_ifp;
  270         LIST_ENTRY(nd_prefix) ndpr_entry;
  271         struct sockaddr_in6 ndpr_prefix;        /* prefix */
  272         struct in6_addr ndpr_mask; /* netmask derived from the prefix */
  273 
  274         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  275         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  276 
  277         time_t ndpr_expire;     /* expiration time of the prefix */
  278         time_t ndpr_preferred;  /* preferred time of the prefix */
  279         time_t ndpr_lastupdate; /* reception time of last advertisement */
  280 
  281         struct prf_ra ndpr_flags;
  282         u_int32_t ndpr_stateflags; /* actual state flags */
  283         /* list of routers that advertise the prefix: */
  284         LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
  285         u_char  ndpr_plen;
  286         int     ndpr_addrcnt;   /* count of derived addresses */
  287         volatile u_int ndpr_refcnt;
  288 };
  289 
  290 #define ndpr_raf                ndpr_flags
  291 #define ndpr_raf_onlink         ndpr_flags.onlink
  292 #define ndpr_raf_auto           ndpr_flags.autonomous
  293 #define ndpr_raf_router         ndpr_flags.router
  294 
  295 /*
  296  * Message format for use in obtaining information about prefixes
  297  * from inet6 sysctl function
  298  */
  299 struct inet6_ndpr_msghdr {
  300         u_short inpm_msglen;    /* to skip over non-understood messages */
  301         u_char  inpm_version;   /* future binary compatibility */
  302         u_char  inpm_type;      /* message type */
  303         struct in6_addr inpm_prefix;
  304         u_long  prm_vltim;
  305         u_long  prm_pltime;
  306         u_long  prm_expire;
  307         u_long  prm_preferred;
  308         struct in6_prflags prm_flags;
  309         u_short prm_index;      /* index for associated ifp */
  310         u_char  prm_plen;       /* length of prefix in bits */
  311 };
  312 
  313 #define prm_raf_onlink          prm_flags.prf_ra.onlink
  314 #define prm_raf_auto            prm_flags.prf_ra.autonomous
  315 
  316 #define prm_statef_onlink       prm_flags.prf_state.onlink
  317 
  318 #define prm_rrf_decrvalid       prm_flags.prf_rr.decrvalid
  319 #define prm_rrf_decrprefd       prm_flags.prf_rr.decrprefd
  320 
  321 struct nd_pfxrouter {
  322         LIST_ENTRY(nd_pfxrouter) pfr_entry;
  323         struct nd_defrouter *router;
  324 };
  325 
  326 #ifdef MALLOC_DECLARE
  327 MALLOC_DECLARE(M_IP6NDP);
  328 #endif
  329 
  330 /* nd6.c */
  331 VNET_DECLARE(int, nd6_prune);
  332 VNET_DECLARE(int, nd6_delay);
  333 VNET_DECLARE(int, nd6_umaxtries);
  334 VNET_DECLARE(int, nd6_mmaxtries);
  335 VNET_DECLARE(int, nd6_useloopback);
  336 VNET_DECLARE(int, nd6_maxnudhint);
  337 VNET_DECLARE(int, nd6_gctimer);
  338 VNET_DECLARE(struct nd_drhead, nd_defrouter);
  339 VNET_DECLARE(struct nd_prhead, nd_prefix);
  340 VNET_DECLARE(int, nd6_debug);
  341 VNET_DECLARE(int, nd6_onlink_ns_rfc4861);
  342 #define V_nd6_prune                     VNET(nd6_prune)
  343 #define V_nd6_delay                     VNET(nd6_delay)
  344 #define V_nd6_umaxtries                 VNET(nd6_umaxtries)
  345 #define V_nd6_mmaxtries                 VNET(nd6_mmaxtries)
  346 #define V_nd6_useloopback               VNET(nd6_useloopback)
  347 #define V_nd6_maxnudhint                VNET(nd6_maxnudhint)
  348 #define V_nd6_gctimer                   VNET(nd6_gctimer)
  349 #define V_nd_defrouter                  VNET(nd_defrouter)
  350 #define V_nd_prefix                     VNET(nd_prefix)
  351 #define V_nd6_debug                     VNET(nd6_debug)
  352 #define V_nd6_onlink_ns_rfc4861         VNET(nd6_onlink_ns_rfc4861)
  353 
  354 /* Lock for the prefix and default router lists. */
  355 VNET_DECLARE(struct rwlock, nd6_lock);
  356 VNET_DECLARE(uint64_t, nd6_list_genid);
  357 #define V_nd6_lock                      VNET(nd6_lock)
  358 #define V_nd6_list_genid                VNET(nd6_list_genid)
  359 
  360 #define ND6_RLOCK()                     rw_rlock(&V_nd6_lock)
  361 #define ND6_RUNLOCK()                   rw_runlock(&V_nd6_lock)
  362 #define ND6_WLOCK()                     rw_wlock(&V_nd6_lock)
  363 #define ND6_WUNLOCK()                   rw_wunlock(&V_nd6_lock)
  364 #define ND6_TRY_UPGRADE()               rw_try_upgrade(&V_nd6_lock)
  365 #define ND6_WLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_WLOCKED)
  366 #define ND6_RLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_RLOCKED)
  367 #define ND6_LOCK_ASSERT()               rw_assert(&V_nd6_lock, RA_LOCKED)
  368 #define ND6_UNLOCK_ASSERT()             rw_assert(&V_nd6_lock, RA_UNLOCKED)
  369 
  370 /* Mutex for prefix onlink/offlink transitions. */
  371 VNET_DECLARE(struct mtx, nd6_onlink_mtx);
  372 #define V_nd6_onlink_mtx                VNET(nd6_onlink_mtx)
  373 
  374 #define ND6_ONLINK_LOCK()               mtx_lock(&V_nd6_onlink_mtx)
  375 #define ND6_ONLINK_TRYLOCK()            mtx_trylock(&V_nd6_onlink_mtx)
  376 #define ND6_ONLINK_UNLOCK()             mtx_unlock(&V_nd6_onlink_mtx)
  377 #define ND6_ONLINK_LOCK_ASSERT()        mtx_assert(&V_nd6_onlink_mtx, MA_OWNED)
  378 #define ND6_ONLINK_UNLOCK_ASSERT()      mtx_assert(&V_nd6_onlink_mtx, MA_NOTOWNED)
  379 
  380 #define nd6log(x)       do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
  381 
  382 /* nd6_rtr.c */
  383 VNET_DECLARE(int, nd6_defifindex);
  384 VNET_DECLARE(int, ip6_desync_factor);   /* seconds */
  385 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
  386 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
  387 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
  388 #define V_nd6_defifindex                VNET(nd6_defifindex)
  389 #define V_ip6_desync_factor             VNET(ip6_desync_factor)
  390 #define V_ip6_temp_preferred_lifetime   VNET(ip6_temp_preferred_lifetime)
  391 #define V_ip6_temp_valid_lifetime       VNET(ip6_temp_valid_lifetime)
  392 #define V_ip6_temp_regen_advance        VNET(ip6_temp_regen_advance)
  393 
  394 union nd_opts {
  395         struct nd_opt_hdr *nd_opt_array[16];    /* max = ND_OPT_NONCE */
  396         struct {
  397                 struct nd_opt_hdr *zero;
  398                 struct nd_opt_hdr *src_lladdr;
  399                 struct nd_opt_hdr *tgt_lladdr;
  400                 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
  401                 struct nd_opt_rd_hdr *rh;
  402                 struct nd_opt_mtu *mtu;
  403                 struct nd_opt_hdr *__res6;
  404                 struct nd_opt_hdr *__res7;
  405                 struct nd_opt_hdr *__res8;
  406                 struct nd_opt_hdr *__res9;
  407                 struct nd_opt_hdr *__res10;
  408                 struct nd_opt_hdr *__res11;
  409                 struct nd_opt_hdr *__res12;
  410                 struct nd_opt_hdr *__res13;
  411                 struct nd_opt_nonce *nonce;
  412                 struct nd_opt_hdr *__res15;
  413                 struct nd_opt_hdr *search;      /* multiple opts */
  414                 struct nd_opt_hdr *last;        /* multiple opts */
  415                 int done;
  416                 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
  417         } nd_opt_each;
  418 };
  419 #define nd_opts_src_lladdr      nd_opt_each.src_lladdr
  420 #define nd_opts_tgt_lladdr      nd_opt_each.tgt_lladdr
  421 #define nd_opts_pi              nd_opt_each.pi_beg
  422 #define nd_opts_pi_end          nd_opt_each.pi_end
  423 #define nd_opts_rh              nd_opt_each.rh
  424 #define nd_opts_mtu             nd_opt_each.mtu
  425 #define nd_opts_nonce           nd_opt_each.nonce
  426 #define nd_opts_search          nd_opt_each.search
  427 #define nd_opts_last            nd_opt_each.last
  428 #define nd_opts_done            nd_opt_each.done
  429 
  430 /* XXX: need nd6_var.h?? */
  431 /* nd6.c */
  432 void nd6_init(void);
  433 #ifdef VIMAGE
  434 void nd6_destroy(void);
  435 #endif
  436 struct nd_ifinfo *nd6_ifattach(struct ifnet *);
  437 void nd6_ifdetach(struct ifnet *, struct nd_ifinfo *);
  438 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
  439 void nd6_option_init(void *, int, union nd_opts *);
  440 struct nd_opt_hdr *nd6_option(union nd_opts *);
  441 int nd6_options(union nd_opts *);
  442 struct llentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *);
  443 struct llentry *nd6_alloc(const struct in6_addr *, int, struct ifnet *);
  444 void nd6_setmtu(struct ifnet *);
  445 void nd6_llinfo_setstate(struct llentry *lle, int newstate);
  446 void nd6_timer(void *);
  447 void nd6_purge(struct ifnet *);
  448 int nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
  449     char *desten, uint32_t *pflags);
  450 int nd6_resolve(struct ifnet *, int, struct mbuf *,
  451     const struct sockaddr *, u_char *, uint32_t *, struct llentry **);
  452 int nd6_ioctl(u_long, caddr_t, struct ifnet *);
  453 void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
  454         char *, int, int, int);
  455 void nd6_grab_holdchain(struct llentry *, struct mbuf **,
  456     struct sockaddr_in6 *);
  457 int nd6_flush_holdchain(struct ifnet *, struct mbuf *,
  458     struct sockaddr_in6 *);
  459 int nd6_add_ifa_lle(struct in6_ifaddr *);
  460 void nd6_rem_ifa_lle(struct in6_ifaddr *, int);
  461 int nd6_output_ifp(struct ifnet *, struct ifnet *, struct mbuf *,
  462     struct sockaddr_in6 *, struct route *);
  463 
  464 /* nd6_nbr.c */
  465 void nd6_na_input(struct mbuf *, int, int);
  466 void nd6_na_output(struct ifnet *, const struct in6_addr *,
  467         const struct in6_addr *, u_long, int, struct sockaddr *);
  468 void nd6_ns_input(struct mbuf *, int, int);
  469 void nd6_ns_output(struct ifnet *, const struct in6_addr *,
  470         const struct in6_addr *, const struct in6_addr *, uint8_t *);
  471 caddr_t nd6_ifptomac(struct ifnet *);
  472 void nd6_dad_init(void);
  473 void nd6_dad_start(struct ifaddr *, int);
  474 void nd6_dad_stop(struct ifaddr *);
  475 
  476 /* nd6_rtr.c */
  477 void nd6_rs_input(struct mbuf *, int, int);
  478 void nd6_ra_input(struct mbuf *, int, int);
  479 void nd6_ifnet_link_event(void *, struct ifnet *, int);
  480 void defrouter_reset(void);
  481 void defrouter_select_fib(int fibnum);
  482 void defrouter_select(void);
  483 void defrouter_ref(struct nd_defrouter *);
  484 void defrouter_rele(struct nd_defrouter *);
  485 bool defrouter_remove(struct in6_addr *, struct ifnet *);
  486 void defrouter_unlink(struct nd_defrouter *, struct nd_drhead *);
  487 void defrouter_del(struct nd_defrouter *);
  488 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
  489     struct nd_prefix **);
  490 void nd6_prefix_unlink(struct nd_prefix *, struct nd_prhead *);
  491 void nd6_prefix_del(struct nd_prefix *);
  492 void nd6_prefix_ref(struct nd_prefix *);
  493 void nd6_prefix_rele(struct nd_prefix *);
  494 int nd6_prefix_onlink(struct nd_prefix *);
  495 int nd6_prefix_offlink(struct nd_prefix *);
  496 void pfxlist_onlink_check(void);
  497 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *);
  498 struct nd_defrouter *defrouter_lookup_locked(struct in6_addr *, struct ifnet *);
  499 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
  500 void rt6_flush(struct in6_addr *, struct ifnet *);
  501 int nd6_setdefaultiface(int);
  502 int in6_tmpifadd(const struct in6_ifaddr *, int, int);
  503 
  504 #endif /* _KERNEL */
  505 
  506 #endif /* _NETINET6_ND6_H_ */

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