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

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