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: stable/12/sys/netinet6/nd6.h 327173 2017-12-25 04:48:39Z kan $
   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 
   94 #ifdef _KERNEL
   95 #define ND_IFINFO(ifp) \
   96         (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
   97 #define IN6_LINKMTU(ifp) \
   98         ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
   99             ? ND_IFINFO(ifp)->linkmtu \
  100             : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
  101                 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
  102 #endif
  103 
  104 struct in6_nbrinfo {
  105         char ifname[IFNAMSIZ];  /* if name, e.g. "en0" */
  106         struct in6_addr addr;   /* IPv6 address of the neighbor */
  107         long    asked;          /* number of queries already sent for this addr */
  108         int     isrouter;       /* if it acts as a router */
  109         int     state;          /* reachability state */
  110         int     expire;         /* lifetime for NDP state transition */
  111 };
  112 
  113 #define DRLSTSIZ 10
  114 #define PRLSTSIZ 10
  115 struct  in6_drlist {
  116         char ifname[IFNAMSIZ];
  117         struct {
  118                 struct  in6_addr rtaddr;
  119                 u_char  flags;
  120                 u_short rtlifetime;
  121                 u_long  expire;
  122                 u_short if_index;
  123         } defrouter[DRLSTSIZ];
  124 };
  125 
  126 struct  in6_defrouter {
  127         struct  sockaddr_in6 rtaddr;
  128         u_char  flags;
  129         u_short rtlifetime;
  130         u_long  expire;
  131         u_short if_index;
  132 };
  133 
  134 #ifdef _KERNEL
  135 struct  in6_oprlist {
  136         char ifname[IFNAMSIZ];
  137         struct {
  138                 struct  in6_addr prefix;
  139                 struct prf_ra raflags;
  140                 u_char  prefixlen;
  141                 u_char  origin;
  142                 u_long vltime;
  143                 u_long pltime;
  144                 u_long expire;
  145                 u_short if_index;
  146                 u_short advrtrs; /* number of advertisement routers */
  147                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  148         } prefix[PRLSTSIZ];
  149 };
  150 #endif
  151 
  152 struct  in6_prlist {
  153         char ifname[IFNAMSIZ];
  154         struct {
  155                 struct  in6_addr prefix;
  156                 struct prf_ra raflags;
  157                 u_char  prefixlen;
  158                 u_char  origin;
  159                 u_int32_t vltime;
  160                 u_int32_t pltime;
  161                 time_t expire;
  162                 u_short if_index;
  163                 u_short advrtrs; /* number of advertisement routers */
  164                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
  165         } prefix[PRLSTSIZ];
  166 };
  167 
  168 struct in6_prefix {
  169         struct  sockaddr_in6 prefix;
  170         struct prf_ra raflags;
  171         u_char  prefixlen;
  172         u_char  origin;
  173         u_int32_t vltime;
  174         u_int32_t pltime;
  175         time_t expire;
  176         u_int32_t flags;
  177         int refcnt;
  178         u_short if_index;
  179         u_short advrtrs; /* number of advertisement routers */
  180         /* struct sockaddr_in6 advrtr[] */
  181 };
  182 
  183 #ifdef _KERNEL
  184 struct  in6_ondireq {
  185         char ifname[IFNAMSIZ];
  186         struct {
  187                 u_int32_t linkmtu;      /* LinkMTU */
  188                 u_int32_t maxmtu;       /* Upper bound of LinkMTU */
  189                 u_int32_t basereachable; /* BaseReachableTime */
  190                 u_int32_t reachable;    /* Reachable Time */
  191                 u_int32_t retrans;      /* Retrans Timer */
  192                 u_int32_t flags;        /* Flags */
  193                 int recalctm;           /* BaseReacable re-calculation timer */
  194                 u_int8_t chlim;         /* CurHopLimit */
  195                 u_int8_t receivedra;
  196         } ndi;
  197 };
  198 #endif
  199 
  200 struct  in6_ndireq {
  201         char ifname[IFNAMSIZ];
  202         struct nd_ifinfo ndi;
  203 };
  204 
  205 struct  in6_ndifreq {
  206         char ifname[IFNAMSIZ];
  207         u_long ifindex;
  208 };
  209 
  210 /* Prefix status */
  211 #define NDPRF_ONLINK            0x1
  212 #define NDPRF_DETACHED          0x2
  213 
  214 /* protocol constants */
  215 #define MAX_RTR_SOLICITATION_DELAY      1       /* 1sec */
  216 #define RTR_SOLICITATION_INTERVAL       4       /* 4sec */
  217 #define MAX_RTR_SOLICITATIONS           3
  218 
  219 #define ND6_INFINITE_LIFETIME           0xffffffff
  220 
  221 #ifdef _KERNEL
  222 /* node constants */
  223 #define MAX_REACHABLE_TIME              3600000 /* msec */
  224 #define REACHABLE_TIME                  30000   /* msec */
  225 #define RETRANS_TIMER                   1000    /* msec */
  226 #define MIN_RANDOM_FACTOR               512     /* 1024 * 0.5 */
  227 #define MAX_RANDOM_FACTOR               1536    /* 1024 * 1.5 */
  228 #define DEF_TEMP_VALID_LIFETIME         604800  /* 1 week */
  229 #define DEF_TEMP_PREFERRED_LIFETIME     86400   /* 1 day */
  230 #define TEMPADDR_REGEN_ADVANCE          5       /* sec */
  231 #define MAX_TEMP_DESYNC_FACTOR          600     /* 10 min */
  232 #define ND_COMPUTE_RTIME(x) \
  233                 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
  234                 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
  235 
  236 TAILQ_HEAD(nd_drhead, nd_defrouter);
  237 struct nd_defrouter {
  238         TAILQ_ENTRY(nd_defrouter) dr_entry;
  239         struct in6_addr rtaddr;
  240         u_char  raflags;        /* flags on RA message */
  241         u_short rtlifetime;
  242         u_long  expire;
  243         struct ifnet *ifp;
  244         int     installed;      /* is installed into kernel routing table */
  245         u_int   refcnt;
  246 };
  247 
  248 struct nd_prefixctl {
  249         struct ifnet *ndpr_ifp;
  250 
  251         /* prefix */
  252         struct sockaddr_in6 ndpr_prefix;
  253         u_char  ndpr_plen;
  254 
  255         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  256         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  257 
  258         struct prf_ra ndpr_flags;
  259 };
  260 
  261 LIST_HEAD(nd_prhead, nd_prefix);
  262 struct nd_prefix {
  263         struct ifnet *ndpr_ifp;
  264         LIST_ENTRY(nd_prefix) ndpr_entry;
  265         struct sockaddr_in6 ndpr_prefix;        /* prefix */
  266         struct in6_addr ndpr_mask; /* netmask derived from the prefix */
  267 
  268         u_int32_t ndpr_vltime;  /* advertised valid lifetime */
  269         u_int32_t ndpr_pltime;  /* advertised preferred lifetime */
  270 
  271         time_t ndpr_expire;     /* expiration time of the prefix */
  272         time_t ndpr_preferred;  /* preferred time of the prefix */
  273         time_t ndpr_lastupdate; /* reception time of last advertisement */
  274 
  275         struct prf_ra ndpr_flags;
  276         u_int32_t ndpr_stateflags; /* actual state flags */
  277         /* list of routers that advertise the prefix: */
  278         LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
  279         u_char  ndpr_plen;
  280         int     ndpr_addrcnt;   /* count of derived addresses */
  281         volatile u_int ndpr_refcnt;
  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 #ifdef MALLOC_DECLARE
  321 MALLOC_DECLARE(M_IP6NDP);
  322 #endif
  323 
  324 /* nd6.c */
  325 VNET_DECLARE(int, nd6_prune);
  326 VNET_DECLARE(int, nd6_delay);
  327 VNET_DECLARE(int, nd6_umaxtries);
  328 VNET_DECLARE(int, nd6_mmaxtries);
  329 VNET_DECLARE(int, nd6_useloopback);
  330 VNET_DECLARE(int, nd6_maxnudhint);
  331 VNET_DECLARE(int, nd6_gctimer);
  332 VNET_DECLARE(struct nd_drhead, nd_defrouter);
  333 VNET_DECLARE(struct nd_prhead, nd_prefix);
  334 VNET_DECLARE(int, nd6_debug);
  335 VNET_DECLARE(int, nd6_onlink_ns_rfc4861);
  336 #define V_nd6_prune                     VNET(nd6_prune)
  337 #define V_nd6_delay                     VNET(nd6_delay)
  338 #define V_nd6_umaxtries                 VNET(nd6_umaxtries)
  339 #define V_nd6_mmaxtries                 VNET(nd6_mmaxtries)
  340 #define V_nd6_useloopback               VNET(nd6_useloopback)
  341 #define V_nd6_maxnudhint                VNET(nd6_maxnudhint)
  342 #define V_nd6_gctimer                   VNET(nd6_gctimer)
  343 #define V_nd_defrouter                  VNET(nd_defrouter)
  344 #define V_nd_prefix                     VNET(nd_prefix)
  345 #define V_nd6_debug                     VNET(nd6_debug)
  346 #define V_nd6_onlink_ns_rfc4861         VNET(nd6_onlink_ns_rfc4861)
  347 
  348 /* Lock for the prefix and default router lists. */
  349 VNET_DECLARE(struct rwlock, nd6_lock);
  350 VNET_DECLARE(uint64_t, nd6_list_genid);
  351 #define V_nd6_lock                      VNET(nd6_lock)
  352 #define V_nd6_list_genid                VNET(nd6_list_genid)
  353 
  354 #define ND6_RLOCK()                     rw_rlock(&V_nd6_lock)
  355 #define ND6_RUNLOCK()                   rw_runlock(&V_nd6_lock)
  356 #define ND6_WLOCK()                     rw_wlock(&V_nd6_lock)
  357 #define ND6_WUNLOCK()                   rw_wunlock(&V_nd6_lock)
  358 #define ND6_TRY_UPGRADE()               rw_try_upgrade(&V_nd6_lock)
  359 #define ND6_WLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_WLOCKED)
  360 #define ND6_RLOCK_ASSERT()              rw_assert(&V_nd6_lock, RA_RLOCKED)
  361 #define ND6_LOCK_ASSERT()               rw_assert(&V_nd6_lock, RA_LOCKED)
  362 #define ND6_UNLOCK_ASSERT()             rw_assert(&V_nd6_lock, RA_UNLOCKED)
  363 
  364 /* Mutex for prefix onlink/offlink transitions. */
  365 VNET_DECLARE(struct mtx, nd6_onlink_mtx);
  366 #define V_nd6_onlink_mtx                VNET(nd6_onlink_mtx)
  367 
  368 #define ND6_ONLINK_LOCK()               mtx_lock(&V_nd6_onlink_mtx)
  369 #define ND6_ONLINK_TRYLOCK()            mtx_trylock(&V_nd6_onlink_mtx)
  370 #define ND6_ONLINK_UNLOCK()             mtx_unlock(&V_nd6_onlink_mtx)
  371 #define ND6_ONLINK_LOCK_ASSERT()        mtx_assert(&V_nd6_onlink_mtx, MA_OWNED)
  372 #define ND6_ONLINK_UNLOCK_ASSERT()      mtx_assert(&V_nd6_onlink_mtx, MA_NOTOWNED)
  373 
  374 #define nd6log(x)       do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
  375 
  376 /* nd6_rtr.c */
  377 VNET_DECLARE(int, nd6_defifindex);
  378 VNET_DECLARE(int, ip6_desync_factor);   /* seconds */
  379 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
  380 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
  381 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
  382 #define V_nd6_defifindex                VNET(nd6_defifindex)
  383 #define V_ip6_desync_factor             VNET(ip6_desync_factor)
  384 #define V_ip6_temp_preferred_lifetime   VNET(ip6_temp_preferred_lifetime)
  385 #define V_ip6_temp_valid_lifetime       VNET(ip6_temp_valid_lifetime)
  386 #define V_ip6_temp_regen_advance        VNET(ip6_temp_regen_advance)
  387 
  388 union nd_opts {
  389         struct nd_opt_hdr *nd_opt_array[16];    /* max = ND_OPT_NONCE */
  390         struct {
  391                 struct nd_opt_hdr *zero;
  392                 struct nd_opt_hdr *src_lladdr;
  393                 struct nd_opt_hdr *tgt_lladdr;
  394                 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
  395                 struct nd_opt_rd_hdr *rh;
  396                 struct nd_opt_mtu *mtu;
  397                 struct nd_opt_hdr *__res6;
  398                 struct nd_opt_hdr *__res7;
  399                 struct nd_opt_hdr *__res8;
  400                 struct nd_opt_hdr *__res9;
  401                 struct nd_opt_hdr *__res10;
  402                 struct nd_opt_hdr *__res11;
  403                 struct nd_opt_hdr *__res12;
  404                 struct nd_opt_hdr *__res13;
  405                 struct nd_opt_nonce *nonce;
  406                 struct nd_opt_hdr *__res15;
  407                 struct nd_opt_hdr *search;      /* multiple opts */
  408                 struct nd_opt_hdr *last;        /* multiple opts */
  409                 int done;
  410                 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
  411         } nd_opt_each;
  412 };
  413 #define nd_opts_src_lladdr      nd_opt_each.src_lladdr
  414 #define nd_opts_tgt_lladdr      nd_opt_each.tgt_lladdr
  415 #define nd_opts_pi              nd_opt_each.pi_beg
  416 #define nd_opts_pi_end          nd_opt_each.pi_end
  417 #define nd_opts_rh              nd_opt_each.rh
  418 #define nd_opts_mtu             nd_opt_each.mtu
  419 #define nd_opts_nonce           nd_opt_each.nonce
  420 #define nd_opts_search          nd_opt_each.search
  421 #define nd_opts_last            nd_opt_each.last
  422 #define nd_opts_done            nd_opt_each.done
  423 
  424 /* XXX: need nd6_var.h?? */
  425 /* nd6.c */
  426 void nd6_init(void);
  427 #ifdef VIMAGE
  428 void nd6_destroy(void);
  429 #endif
  430 struct nd_ifinfo *nd6_ifattach(struct ifnet *);
  431 void nd6_ifdetach(struct ifnet *, struct nd_ifinfo *);
  432 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *);
  433 void nd6_option_init(void *, int, union nd_opts *);
  434 struct nd_opt_hdr *nd6_option(union nd_opts *);
  435 int nd6_options(union nd_opts *);
  436 struct llentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *);
  437 struct llentry *nd6_alloc(const struct in6_addr *, int, struct ifnet *);
  438 void nd6_setmtu(struct ifnet *);
  439 void nd6_llinfo_setstate(struct llentry *lle, int newstate);
  440 void nd6_timer(void *);
  441 void nd6_purge(struct ifnet *);
  442 int nd6_resolve_addr(struct ifnet *ifp, int flags, const struct sockaddr *dst,
  443     char *desten, uint32_t *pflags);
  444 int nd6_resolve(struct ifnet *, int, struct mbuf *,
  445     const struct sockaddr *, u_char *, uint32_t *, struct llentry **);
  446 int nd6_ioctl(u_long, caddr_t, struct ifnet *);
  447 void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
  448         char *, int, int, int);
  449 void nd6_grab_holdchain(struct llentry *, struct mbuf **,
  450     struct sockaddr_in6 *);
  451 int nd6_flush_holdchain(struct ifnet *, struct mbuf *,
  452     struct sockaddr_in6 *);
  453 int nd6_add_ifa_lle(struct in6_ifaddr *);
  454 void nd6_rem_ifa_lle(struct in6_ifaddr *, int);
  455 int nd6_output_ifp(struct ifnet *, struct ifnet *, struct mbuf *,
  456     struct sockaddr_in6 *, struct route *);
  457 
  458 /* nd6_nbr.c */
  459 void nd6_na_input(struct mbuf *, int, int);
  460 void nd6_na_output(struct ifnet *, const struct in6_addr *,
  461         const struct in6_addr *, u_long, int, struct sockaddr *);
  462 void nd6_ns_input(struct mbuf *, int, int);
  463 void nd6_ns_output(struct ifnet *, const struct in6_addr *,
  464         const struct in6_addr *, const struct in6_addr *, uint8_t *);
  465 caddr_t nd6_ifptomac(struct ifnet *);
  466 void nd6_dad_init(void);
  467 void nd6_dad_start(struct ifaddr *, int);
  468 void nd6_dad_stop(struct ifaddr *);
  469 
  470 /* nd6_rtr.c */
  471 void nd6_rs_input(struct mbuf *, int, int);
  472 void nd6_ra_input(struct mbuf *, int, int);
  473 void defrouter_reset(void);
  474 void defrouter_select_fib(int fibnum);
  475 void defrouter_select(void);
  476 void defrouter_ref(struct nd_defrouter *);
  477 void defrouter_rele(struct nd_defrouter *);
  478 bool defrouter_remove(struct in6_addr *, struct ifnet *);
  479 void defrouter_unlink(struct nd_defrouter *, struct nd_drhead *);
  480 void defrouter_del(struct nd_defrouter *);
  481 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
  482     struct nd_prefix **);
  483 void nd6_prefix_unlink(struct nd_prefix *, struct nd_prhead *);
  484 void nd6_prefix_del(struct nd_prefix *);
  485 void nd6_prefix_ref(struct nd_prefix *);
  486 void nd6_prefix_rele(struct nd_prefix *);
  487 int nd6_prefix_onlink(struct nd_prefix *);
  488 int nd6_prefix_offlink(struct nd_prefix *);
  489 void pfxlist_onlink_check(void);
  490 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *);
  491 struct nd_defrouter *defrouter_lookup_locked(struct in6_addr *, struct ifnet *);
  492 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
  493 void rt6_flush(struct in6_addr *, struct ifnet *);
  494 int nd6_setdefaultiface(int);
  495 int in6_tmpifadd(const struct in6_ifaddr *, int, int);
  496 
  497 #endif /* _KERNEL */
  498 
  499 #endif /* _NETINET6_ND6_H_ */

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