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: stable/10/sys/netinet6/nd6.h 303458 2016-07-28 20:08:01Z sbruno $
   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 #define ND6_CREATE              LLE_CREATE
   93 #define ND6_EXCLUSIVE           LLE_EXCLUSIVE
   94 
   95 #ifdef _KERNEL
   96 #define ND_IFINFO(ifp) \
   97         (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
   98 #define IN6_LINKMTU(ifp) \
   99         ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
  100             ? ND_IFINFO(ifp)->linkmtu \
  101             : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
  102                 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
  103 #endif
  104 
  105 struct in6_nbrinfo {
  106         char ifname[IFNAMSIZ];  /* if name, e.g. "en0" */
  107         struct in6_addr addr;   /* IPv6 address of the neighbor */
  108         long    asked;          /* number of queries already sent for this addr */
  109         int     isrouter;       /* if it acts as a router */
  110         int     state;          /* reachability state */
  111         int     expire;         /* lifetime for NDP state transition */
  112 };
  113 
  114 #define DRLSTSIZ 10
  115 #define PRLSTSIZ 10
  116 struct  in6_drlist {
  117         char ifname[IFNAMSIZ];
  118         struct {
  119                 struct  in6_addr rtaddr;
  120                 u_char  flags;
  121                 u_short rtlifetime;
  122                 u_long  expire;
  123                 u_short if_index;
  124         } defrouter[DRLSTSIZ];
  125 };
  126 
  127 struct  in6_defrouter {
  128         struct  sockaddr_in6 rtaddr;
  129         u_char  flags;
  130         u_short rtlifetime;
  131         u_long  expire;
  132         u_short if_index;
  133 };
  134 
  135 #ifdef _KERNEL
  136 struct  in6_oprlist {
  137         char ifname[IFNAMSIZ];
  138         struct {
  139                 struct  in6_addr prefix;
  140                 struct prf_ra raflags;
  141                 u_char  prefixlen;
  142                 u_char  origin;
  143                 u_long vltime;
  144                 u_long pltime;
  145                 u_long expire;
  146                 u_short if_index;
  147                 u_short advrtrs; /* number of advertisement routers */
  148                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  149         } prefix[PRLSTSIZ];
  150 };
  151 #endif
  152 
  153 struct  in6_prlist {
  154         char ifname[IFNAMSIZ];
  155         struct {
  156                 struct  in6_addr prefix;
  157                 struct prf_ra raflags;
  158                 u_char  prefixlen;
  159                 u_char  origin;
  160                 u_int32_t vltime;
  161                 u_int32_t pltime;
  162                 time_t expire;
  163                 u_short if_index;
  164                 u_short advrtrs; /* number of advertisement routers */
  165                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  166         } prefix[PRLSTSIZ];
  167 };
  168 
  169 struct in6_prefix {
  170         struct  sockaddr_in6 prefix;
  171         struct prf_ra raflags;
  172         u_char  prefixlen;
  173         u_char  origin;
  174         u_int32_t vltime;
  175         u_int32_t pltime;
  176         time_t expire;
  177         u_int32_t flags;
  178         int refcnt;
  179         u_short if_index;
  180         u_short advrtrs; /* number of advertisement routers */
  181         /* struct sockaddr_in6 advrtr[] */
  182 };
  183 
  184 #ifdef _KERNEL
  185 struct  in6_ondireq {
  186         char ifname[IFNAMSIZ];
  187         struct {
  188                 u_int32_t linkmtu;      /* LinkMTU */
  189                 u_int32_t maxmtu;       /* Upper bound of LinkMTU */
  190                 u_int32_t basereachable; /* BaseReachableTime */
  191                 u_int32_t reachable;    /* Reachable Time */
  192                 u_int32_t retrans;      /* Retrans Timer */
  193                 u_int32_t flags;        /* Flags */
  194                 int recalctm;           /* BaseReacable re-calculation timer */
  195                 u_int8_t chlim;         /* CurHopLimit */
  196                 u_int8_t receivedra;
  197         } ndi;
  198 };
  199 #endif
  200 
  201 struct  in6_ndireq {
  202         char ifname[IFNAMSIZ];
  203         struct nd_ifinfo ndi;
  204 };
  205 
  206 struct  in6_ndifreq {
  207         char ifname[IFNAMSIZ];
  208         u_long ifindex;
  209 };
  210 
  211 /* Prefix status */
  212 #define NDPRF_ONLINK            0x1
  213 #define NDPRF_DETACHED          0x2
  214 
  215 /* protocol constants */
  216 #define MAX_RTR_SOLICITATION_DELAY      1       /* 1sec */
  217 #define RTR_SOLICITATION_INTERVAL       4       /* 4sec */
  218 #define MAX_RTR_SOLICITATIONS           3
  219 
  220 #define ND6_INFINITE_LIFETIME           0xffffffff
  221 
  222 #ifdef _KERNEL
  223 /* node constants */
  224 #define MAX_REACHABLE_TIME              3600000 /* msec */
  225 #define REACHABLE_TIME                  30000   /* msec */
  226 #define RETRANS_TIMER                   1000    /* msec */
  227 #define MIN_RANDOM_FACTOR               512     /* 1024 * 0.5 */
  228 #define MAX_RANDOM_FACTOR               1536    /* 1024 * 1.5 */
  229 #define DEF_TEMP_VALID_LIFETIME         604800  /* 1 week */
  230 #define DEF_TEMP_PREFERRED_LIFETIME     86400   /* 1 day */
  231 #define TEMPADDR_REGEN_ADVANCE          5       /* sec */
  232 #define MAX_TEMP_DESYNC_FACTOR          600     /* 10 min */
  233 #define ND_COMPUTE_RTIME(x) \
  234                 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
  235                 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
  236 
  237 TAILQ_HEAD(nd_drhead, nd_defrouter);
  238 struct nd_defrouter {
  239         TAILQ_ENTRY(nd_defrouter) dr_entry;
  240         struct in6_addr rtaddr;
  241         u_char  raflags;        /* flags on RA message */
  242         u_short rtlifetime;
  243         u_long  expire;
  244         struct ifnet *ifp;
  245         int     installed;      /* is installed into kernel routing table */
  246         u_int   refcnt;
  247 };
  248 
  249 struct nd_prefixctl {
  250         struct ifnet *ndpr_ifp;
  251 
  252         /* prefix */
  253         struct sockaddr_in6 ndpr_prefix;
  254         u_char  ndpr_plen;
  255 
  256         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  257         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  258 
  259         struct prf_ra ndpr_flags;
  260 };
  261 
  262 
  263 struct nd_prefix {
  264         struct ifnet *ndpr_ifp;
  265         LIST_ENTRY(nd_prefix) ndpr_entry;
  266         struct sockaddr_in6 ndpr_prefix;        /* prefix */
  267         struct in6_addr ndpr_mask; /* netmask derived from the prefix */
  268 
  269         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  270         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  271 
  272         time_t ndpr_expire;     /* expiration time of the prefix */
  273         time_t ndpr_preferred;  /* preferred time of the prefix */
  274         time_t ndpr_lastupdate; /* reception time of last advertisement */
  275 
  276         struct prf_ra ndpr_flags;
  277         u_int32_t ndpr_stateflags; /* actual state flags */
  278         /* list of routers that advertise the prefix: */
  279         LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
  280         u_char  ndpr_plen;
  281         int     ndpr_refcnt;    /* reference couter from addresses */
  282 };
  283 
  284 #define ndpr_raf                ndpr_flags
  285 #define ndpr_raf_onlink         ndpr_flags.onlink
  286 #define ndpr_raf_auto           ndpr_flags.autonomous
  287 #define ndpr_raf_router         ndpr_flags.router
  288 
  289 /*
  290  * Message format for use in obtaining information about prefixes
  291  * from inet6 sysctl function
  292  */
  293 struct inet6_ndpr_msghdr {
  294         u_short inpm_msglen;    /* to skip over non-understood messages */
  295         u_char  inpm_version;   /* future binary compatibility */
  296         u_char  inpm_type;      /* message type */
  297         struct in6_addr inpm_prefix;
  298         u_long  prm_vltim;
  299         u_long  prm_pltime;
  300         u_long  prm_expire;
  301         u_long  prm_preferred;
  302         struct in6_prflags prm_flags;
  303         u_short prm_index;      /* index for associated ifp */
  304         u_char  prm_plen;       /* length of prefix in bits */
  305 };
  306 
  307 #define prm_raf_onlink          prm_flags.prf_ra.onlink
  308 #define prm_raf_auto            prm_flags.prf_ra.autonomous
  309 
  310 #define prm_statef_onlink       prm_flags.prf_state.onlink
  311 
  312 #define prm_rrf_decrvalid       prm_flags.prf_rr.decrvalid
  313 #define prm_rrf_decrprefd       prm_flags.prf_rr.decrprefd
  314 
  315 struct nd_pfxrouter {
  316         LIST_ENTRY(nd_pfxrouter) pfr_entry;
  317         struct nd_defrouter *router;
  318 };
  319 
  320 LIST_HEAD(nd_prhead, nd_prefix);
  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 #define V_nd6_lock                      VNET(nd6_lock)
  349 
  350 #define ND6_RLOCK()                     rw_rlock(&V_nd6_lock)
  351 #define ND6_RUNLOCK()                   rw_runlock(&V_nd6_lock)
  352 #define ND6_WLOCK()                     rw_wlock(&V_nd6_lock)
  353 #define ND6_WUNLOCK()                   rw_wunlock(&V_nd6_lock)
  354 #define ND6_WLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_WLOCKED)
  355 #define ND6_RLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_RLOCKED)
  356 #define ND6_LOCK_ASSERT()               rw_assert(&V_nd6_lock, RA_LOCKED)
  357 #define ND6_UNLOCK_ASSERT()             rw_assert(&V_nd6_lock, RA_UNLOCKED)
  358 
  359 #define nd6log(x)       do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
  360 
  361 VNET_DECLARE(struct callout, nd6_timer_ch);
  362 #define V_nd6_timer_ch                  VNET(nd6_timer_ch)
  363 
  364 /* nd6_rtr.c */
  365 VNET_DECLARE(int, nd6_defifindex);
  366 VNET_DECLARE(int, ip6_desync_factor);   /* seconds */
  367 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
  368 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
  369 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
  370 #define V_nd6_defifindex                VNET(nd6_defifindex)
  371 #define V_ip6_desync_factor             VNET(ip6_desync_factor)
  372 #define V_ip6_temp_preferred_lifetime   VNET(ip6_temp_preferred_lifetime)
  373 #define V_ip6_temp_valid_lifetime       VNET(ip6_temp_valid_lifetime)
  374 #define V_ip6_temp_regen_advance        VNET(ip6_temp_regen_advance)
  375 
  376 union nd_opts {
  377         struct nd_opt_hdr *nd_opt_array[16];    /* max = ND_OPT_NONCE */
  378         struct {
  379                 struct nd_opt_hdr *zero;
  380                 struct nd_opt_hdr *src_lladdr;
  381                 struct nd_opt_hdr *tgt_lladdr;
  382                 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
  383                 struct nd_opt_rd_hdr *rh;
  384                 struct nd_opt_mtu *mtu;
  385                 struct nd_opt_hdr *__res6;
  386                 struct nd_opt_hdr *__res7;
  387                 struct nd_opt_hdr *__res8;
  388                 struct nd_opt_hdr *__res9;
  389                 struct nd_opt_hdr *__res10;
  390                 struct nd_opt_hdr *__res11;
  391                 struct nd_opt_hdr *__res12;
  392                 struct nd_opt_hdr *__res13;
  393                 struct nd_opt_nonce *nonce;
  394                 struct nd_opt_hdr *__res15;
  395                 struct nd_opt_hdr *search;      /* multiple opts */
  396                 struct nd_opt_hdr *last;        /* multiple opts */
  397                 int done;
  398                 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
  399         } nd_opt_each;
  400 };
  401 #define nd_opts_src_lladdr      nd_opt_each.src_lladdr
  402 #define nd_opts_tgt_lladdr      nd_opt_each.tgt_lladdr
  403 #define nd_opts_pi              nd_opt_each.pi_beg
  404 #define nd_opts_pi_end          nd_opt_each.pi_end
  405 #define nd_opts_rh              nd_opt_each.rh
  406 #define nd_opts_mtu             nd_opt_each.mtu
  407 #define nd_opts_nonce           nd_opt_each.nonce
  408 #define nd_opts_search          nd_opt_each.search
  409 #define nd_opts_last            nd_opt_each.last
  410 #define nd_opts_done            nd_opt_each.done
  411 
  412 /* XXX: need nd6_var.h?? */
  413 /* nd6.c */
  414 void nd6_init(void);
  415 #ifdef VIMAGE
  416 void nd6_destroy(void);
  417 #endif
  418 struct nd_ifinfo *nd6_ifattach(struct ifnet *);
  419 void nd6_ifdetach(struct nd_ifinfo *);
  420 int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *);
  421 void nd6_option_init(void *, int, union nd_opts *);
  422 struct nd_opt_hdr *nd6_option(union nd_opts *);
  423 int nd6_options(union nd_opts *);
  424 struct  llentry *nd6_lookup(struct in6_addr *, int, struct ifnet *);
  425 void nd6_setmtu(struct ifnet *);
  426 void nd6_llinfo_settimer(struct llentry *, long);
  427 void nd6_llinfo_settimer_locked(struct llentry *, long);
  428 void nd6_timer(void *);
  429 void nd6_purge(struct ifnet *);
  430 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
  431 int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
  432         struct sockaddr *, u_char *);
  433 void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
  434 int nd6_ioctl(u_long, caddr_t, struct ifnet *);
  435 struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
  436         char *, int, int, int);
  437 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *,
  438         struct sockaddr_in6 *, struct rtentry *);
  439 void nd6_grab_holdchain(struct llentry *, struct mbuf **,
  440     struct sockaddr_in6 *);
  441 int nd6_flush_holdchain(struct ifnet *, struct ifnet *, struct mbuf *,
  442     struct sockaddr_in6 *);
  443 int nd6_need_cache(struct ifnet *);
  444 int nd6_storelladdr(struct ifnet *, struct mbuf *,
  445         const struct sockaddr *, u_char *, struct llentry **);
  446 
  447 /* nd6_nbr.c */
  448 void nd6_na_input(struct mbuf *, int, int);
  449 void nd6_na_output(struct ifnet *, const struct in6_addr *,
  450         const struct in6_addr *, u_long, int, struct sockaddr *);
  451 void nd6_ns_input(struct mbuf *, int, int);
  452 void nd6_ns_output(struct ifnet *, const struct in6_addr *,
  453         const struct in6_addr *, struct llentry *, uint8_t *);
  454 caddr_t nd6_ifptomac(struct ifnet *);
  455 void nd6_dad_init(void);
  456 void nd6_dad_start(struct ifaddr *, int);
  457 void nd6_dad_stop(struct ifaddr *);
  458 
  459 /* nd6_rtr.c */
  460 void nd6_rs_input(struct mbuf *, int, int);
  461 void nd6_ra_input(struct mbuf *, int, int);
  462 void defrouter_reset(void);
  463 void defrouter_select(void);
  464 void defrouter_ref(struct nd_defrouter *);
  465 void defrouter_rele(struct nd_defrouter *);
  466 bool defrouter_remove(struct in6_addr *, struct ifnet *);
  467 void defrouter_unlink(struct nd_defrouter *, struct nd_drhead *);
  468 void defrouter_del(struct nd_defrouter *);
  469 void prelist_remove(struct nd_prefix *);
  470 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
  471         struct nd_prefix **);
  472 void pfxlist_onlink_check(void);
  473 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *);
  474 struct nd_defrouter *defrouter_lookup_locked(struct in6_addr *, struct ifnet *);
  475 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
  476 void rt6_flush(struct in6_addr *, struct ifnet *);
  477 int nd6_setdefaultiface(int);
  478 int in6_tmpifadd(const struct in6_ifaddr *, int, int);
  479 
  480 #endif /* _KERNEL */
  481 
  482 #endif /* _NETINET6_ND6_H_ */

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