bsd/netinet6/nd6.h

   1 /*
   2  * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. Neither the name of the project nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef _NETINET6_ND6_H_
  58 #define _NETINET6_ND6_H_
  59 #include <sys/appleapiopts.h>
  60 #include <net/net_kev.h>
  61
  62 /* see net/route.h, or net/if_inarp.h */
  63 #ifndef RTF_ANNOUNCE
  64 #define RTF_ANNOUNCE    RTF_PROTO2
  65 #endif
  66
  67 #include <sys/queue.h>
  68
  69 #ifdef BSD_KERNEL_PRIVATE
  70 #include <net/flowadv.h>
  71 #include <kern/locks.h>
  72 #include <sys/tree.h>
  73 #include <sys/eventhandler.h>
  74 #include <netinet6/nd6_var.h>
  75
  76 struct  llinfo_nd6 {
  77         /*
  78          * The following are protected by rnh_lock
  79          */
  80         struct  llinfo_nd6 *ln_next;
  81         struct  llinfo_nd6 *ln_prev;
  82         struct  rtentry *ln_rt;
  83         /*
  84          * The following are protected by rt_lock
  85          */
  86         struct ifnet *ln_exclifp; /* excluded interface (prefix proxy) */
  87         struct  mbuf *ln_hold;  /* last packet until resolved/timeout */
  88         uint32_t ln_asked;      /* # of queries already sent for this addr */
  89         short   ln_state;       /* reachability state */
  90         short   ln_router;      /* 2^0: ND6 router bit */
  91         u_int32_t ln_flags;     /* flags; see below */
  92         u_int64_t ln_expire;    /* lifetime for NDP state transition */
  93         u_int64_t ln_lastused;  /* last used timestamp */
  94         struct  if_llreach *ln_llreach; /* link-layer reachability record */
  95 };
  96
  97 /* Values for ln_flags */
  98 #define ND6_LNF_TIMER_SKIP      0x1     /* modified by nd6_timer() */
  99 #define ND6_LNF_IN_USE          0x2     /* currently in llinfo_nd6 list */
 100 #endif /* BSD_KERNEL_PRIVATE */
 101
 102 #define ND6_LLINFO_PURGE        -3
 103 #define ND6_LLINFO_NOSTATE      -2
 104 /*
 105  * We don't need the WAITDELETE state any more, but we keep the definition
 106  * in a comment line instead of removing it. This is necessary to avoid
 107  * unintentionally reusing the value for another purpose, which might
 108  * affect backward compatibility with old applications.
 109  * (20000711 jinmei@kame.net)
 110  */
 111 /* #define      ND6_LLINFO_WAITDELETE   -1 */
 112 #define ND6_LLINFO_INCOMPLETE   0
 113 #define ND6_LLINFO_REACHABLE    1
 114 #define ND6_LLINFO_STALE        2
 115 #define ND6_LLINFO_DELAY        3
 116 #define ND6_LLINFO_PROBE        4
 117
 118 #ifdef BSD_KERNEL_PRIVATE
 119
 120 #define ND6_CACHE_STATE_TRANSITION(ln, nstate) do {\
 121         if (nd6_debug >= 1) {\
 122                 struct rtentry *ln_rt = ln != NULL ? (ln)->ln_rt : NULL; \
 123                 nd6log(info,\
 124                     "[%s:%d]: NDP cache entry changed from %s -> %s for address %s.\n",\
 125                     __func__,\
 126                     __LINE__,\
 127                     ndcache_state2str((ln)->ln_state),\
 128                     ndcache_state2str(nstate),\
 129                     ln_rt != NULL ? ip6_sprintf(&SIN6(rt_key(ln_rt))->sin6_addr) : "N/A");\
 130         }\
 131         if (ln != NULL)\
 132                 (ln)->ln_state = nstate;\
 133 } while(0)
 134
 135 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
 136 #define ND6_LLINFO_PERMANENT(n) \
 137         (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE))
 138
 139 #define ND6_EUI64_GBIT  0x01
 140 #define ND6_EUI64_UBIT  0x02
 141
 142 #define ND6_EUI64_TO_IFID(in6) \
 143         do {(in6)->s6_addr[8] ^= ND6_EUI64_UBIT; } while (0)
 144
 145 #define ND6_EUI64_GROUP(in6)            ((in6)->s6_addr[8] & ND6_EUI64_GBIT)
 146 #define ND6_EUI64_INDIVIDUAL(in6)       (!ND6_EUI64_GROUP(in6))
 147 #define ND6_EUI64_LOCAL(in6)            ((in6)->s6_addr[8] & ND6_EUI64_UBIT)
 148 #define ND6_EUI64_UNIVERSAL(in6)        (!ND6_EUI64_LOCAL(in6))
 149 #define ND6_IFID_LOCAL(in6)             (!ND6_EUI64_LOCAL(in6))
 150 #define ND6_IFID_UNIVERSAL(in6)         (!ND6_EUI64_UNIVERSAL(in6))
 151 #endif /* BSD_KERNEL_PRIVATE */
 152
 153 #if !defined(BSD_KERNEL_PRIVATE)
 154 struct nd_ifinfo {
 155 #else
 156 /* For binary compatibility, this structure must not change */
 157 /* NOTE: nd_ifinfo is defined in nd6_var.h */
 158 struct nd_ifinfo_compat {
 159 #endif /* !BSD_KERNEL_PRIVATE */
 160         u_int32_t linkmtu;              /* LinkMTU */
 161         u_int32_t maxmtu;               /* Upper bound of LinkMTU */
 162         u_int32_t basereachable;        /* BaseReachableTime */
 163         u_int32_t reachable;            /* Reachable Time */
 164         u_int32_t retrans;              /* Retrans Timer */
 165         u_int32_t flags;                /* Flags */
 166         int recalctm;                   /* BaseReacable re-calculation timer */
 167         u_int8_t chlim;                 /* CurHopLimit */
 168         u_int8_t receivedra;
 169         /* the following 3 members are for privacy extension for addrconf */
 170         u_int8_t randomseed0[8]; /* upper 64 bits of SHA1 digest */
 171         u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
 172         u_int8_t randomid[8];   /* current random ID */
 173 };
 174
 175 #define ND6_IFF_PERFORMNUD              0x1
 176 #if defined(PRIVATE)
 177
 178 /*
 179  * APPLE: not used. Interface specific router advertisements are handled with a
 180  * specific ifnet flag: IFEF_ACCEPT_RTADVD
 181  */
 182 #define ND6_IFF_ACCEPT_RTADV            0x2
 183
 184 /* APPLE: NOT USED not related to ND. */
 185 #define ND6_IFF_PREFER_SOURCE           0x4
 186
 187 /* IPv6 operation is disabled due to * DAD failure.  (XXX: not ND-specific) */
 188 #define ND6_IFF_IFDISABLED              0x8
 189
 190 #define ND6_IFF_DONT_SET_IFROUTE        0x10 /* NOT USED */
 191 #endif /* PRIVATE */
 192 #define ND6_IFF_PROXY_PREFIXES          0x20
 193 #define ND6_IFF_IGNORE_NA               0x40
 194 #if defined(PRIVATE)
 195 #define ND6_IFF_INSECURE                0x80
 196 #endif
 197 #define ND6_IFF_REPLICATED              0x100   /* sleep proxy registered */
 198 #define ND6_IFF_DAD                     0x200   /* Perform DAD on the interface */
 199
 200 extern int dad_enhanced;
 201 #define ND6_DAD_ENHANCED_DEFAULT        1
 202
 203 struct in6_nbrinfo {
 204         char ifname[IFNAMSIZ];  /* if name, e.g. "en0" */
 205         struct in6_addr addr;   /* IPv6 address of the neighbor */
 206         long    asked;          /* # of queries already sent for this addr */
 207         int     isrouter;       /* if it acts as a router */
 208         int     state;          /* reachability state */
 209         int     expire;         /* lifetime for NDP state transition */
 210 };
 211
 212 #if defined(BSD_KERNEL_PRIVATE)
 213 struct in6_nbrinfo_32 {
 214         char ifname[IFNAMSIZ];
 215         struct in6_addr addr;
 216         u_int32_t asked;
 217         int     isrouter;
 218         int     state;
 219         int     expire;
 220 };
 221
 222 struct in6_nbrinfo_64 {
 223         char ifname[IFNAMSIZ];
 224         struct in6_addr addr;
 225         long    asked;
 226         int     isrouter        __attribute__((aligned(8)));
 227         int     state;
 228         int     expire;
 229 } __attribute__((aligned(8)));
 230 #endif /* BSD_KERNEL_PRIVATE */
 231
 232 #define DRLSTSIZ 10
 233 #define PRLSTSIZ 10
 234
 235 struct  in6_drlist {
 236         char ifname[IFNAMSIZ];
 237         struct {
 238                 struct  in6_addr rtaddr;
 239                 u_char  flags;
 240                 u_short rtlifetime;
 241                 u_long  expire;
 242                 u_short if_index;
 243         } defrouter[DRLSTSIZ];
 244 };
 245
 246 #if defined(BSD_KERNEL_PRIVATE)
 247 #define ND6_PROCESS_RTI_ENABLE    1
 248 #define ND6_PROCESS_RTI_DISABLE   0
 249 #define ND6_PROCESS_RTI_DEFAULT   ND6_PROCESS_RTI_ENABLE
 250
 251 extern int nd6_process_rti;
 252
 253 struct  in6_drlist_32 {
 254         char ifname[IFNAMSIZ];
 255         struct {
 256                 struct  in6_addr rtaddr;
 257                 u_char  flags;
 258                 u_short rtlifetime;
 259                 u_int32_t expire;
 260                 u_short if_index;
 261         } defrouter[DRLSTSIZ];
 262 };
 263
 264 struct  in6_drlist_64 {
 265         char ifname[IFNAMSIZ];
 266         struct {
 267                 struct  in6_addr rtaddr;
 268                 u_char  flags;
 269                 u_short rtlifetime;
 270                 u_long  expire          __attribute__((aligned(8)));
 271                 u_short if_index        __attribute__((aligned(8)));
 272         } defrouter[DRLSTSIZ] __attribute__((aligned(8)));
 273 };
 274 #endif /* BSD_KERNEL_PRIVATE */
 275
 276 /* valid values for stateflags */
 277 #define NDDRF_INSTALLED 0x01     /* installed in the routing table */
 278 #define NDDRF_IFSCOPE   0x02     /* installed as a scoped route */
 279 #define NDDRF_STATIC    0x04     /* for internal use only */
 280 #define NDDRF_MAPPED    0x08     /* Default router addr is mapped to a different one for routing */
 281 #define NDDRF_INELIGIBLE     0x10     /* Default router entry is ineligible for default router selection */
 282
 283 struct  in6_defrouter {
 284         struct  sockaddr_in6 rtaddr;
 285         u_char  flags;
 286         u_char  stateflags;
 287         u_short rtlifetime;
 288         u_long  expire;
 289         u_short if_index;
 290 };
 291
 292 #if defined(BSD_KERNEL_PRIVATE)
 293 struct  in6_defrouter_32 {
 294         struct  sockaddr_in6 rtaddr;
 295         u_char  flags;
 296         u_char  stateflags;
 297         u_short rtlifetime;
 298         u_int32_t expire;
 299         u_short if_index;
 300 };
 301
 302 struct  in6_defrouter_64 {
 303         struct  sockaddr_in6 rtaddr;
 304         u_char  flags;
 305         u_char  stateflags;
 306         u_short rtlifetime;
 307         u_long  expire          __attribute__((aligned(8)));
 308         u_short if_index        __attribute__((aligned(8)));
 309 } __attribute__((aligned(8)));
 310 #endif /* BSD_KERNEL_PRIVATE */
 311
 312 struct  in6_prlist {
 313         char ifname[IFNAMSIZ];
 314         struct {
 315                 struct  in6_addr prefix;
 316                 struct prf_ra raflags;
 317                 u_char  prefixlen;
 318                 u_char  origin;
 319                 u_long  vltime;
 320                 u_long  pltime;
 321                 u_long  expire;
 322                 u_short if_index;
 323                 u_short advrtrs; /* number of advertisement routers */
 324                 struct  in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
 325         } prefix[PRLSTSIZ];
 326 };
 327
 328 #if defined(BSD_KERNEL_PRIVATE)
 329 struct  in6_prlist_32 {
 330         char ifname[IFNAMSIZ];
 331         struct {
 332                 struct  in6_addr prefix;
 333                 struct prf_ra raflags;
 334                 u_char  prefixlen;
 335                 u_char  origin;
 336                 u_int32_t vltime;
 337                 u_int32_t pltime;
 338                 u_int32_t expire;
 339                 u_short if_index;
 340                 u_short advrtrs;
 341                 struct  in6_addr advrtr[DRLSTSIZ];
 342         } prefix[PRLSTSIZ];
 343 };
 344
 345 struct  in6_prlist_64 {
 346         char ifname[IFNAMSIZ];
 347         struct {
 348                 struct  in6_addr prefix;
 349                 struct prf_ra raflags;
 350                 u_char  prefixlen;
 351                 u_char  origin;
 352                 u_long  vltime  __attribute__((aligned(8)));
 353                 u_long  pltime  __attribute__((aligned(8)));
 354                 u_long  expire  __attribute__((aligned(8)));
 355                 u_short if_index;
 356                 u_short advrtrs;
 357                 u_int32_t pad;
 358                 struct  in6_addr advrtr[DRLSTSIZ];
 359         } prefix[PRLSTSIZ];
 360 };
 361 #endif /* BSD_KERNEL_PRIVATE */
 362
 363 struct in6_prefix {
 364         struct  sockaddr_in6 prefix;
 365         struct prf_ra raflags;
 366         u_char  prefixlen;
 367         u_char  origin;
 368         u_long  vltime;
 369         u_long  pltime;
 370         u_long  expire;
 371         u_int32_t flags;
 372         int refcnt;
 373         u_short if_index;
 374         u_short advrtrs; /* number of advertisement routers */
 375         /* struct sockaddr_in6 advrtr[] */
 376 };
 377
 378 #if defined(BSD_KERNEL_PRIVATE)
 379 struct in6_prefix_32 {
 380         struct  sockaddr_in6 prefix;
 381         struct prf_ra raflags;
 382         u_char  prefixlen;
 383         u_char  origin;
 384         u_int32_t vltime;
 385         u_int32_t pltime;
 386         u_int32_t expire;
 387         u_int32_t flags;
 388         int refcnt;
 389         u_short if_index;
 390         u_short advrtrs; /* number of advertisement routers */
 391         /* struct sockaddr_in6 advrtr[] */
 392 };
 393
 394 struct in6_prefix_64 {
 395         struct  sockaddr_in6 prefix;
 396         struct prf_ra raflags;
 397         u_char  prefixlen;
 398         u_char  origin;
 399         u_long  vltime  __attribute__((aligned(8)));
 400         u_long  pltime  __attribute__((aligned(8)));
 401         u_long  expire  __attribute__((aligned(8)));
 402         u_int32_t flags __attribute__((aligned(8)));
 403         int refcnt;
 404         u_short if_index;
 405         u_short advrtrs;
 406         /* struct sockaddr_in6 advrtr[] */
 407 };
 408 #endif /* BSD_KERNEL_PRIVATE */
 409
 410 struct  in6_ondireq {
 411         char ifname[IFNAMSIZ];
 412         struct {
 413                 u_int32_t linkmtu;      /* LinkMTU */
 414                 u_int32_t maxmtu;       /* Upper bound of LinkMTU */
 415                 u_int32_t basereachable; /* BaseReachableTime */
 416                 u_int32_t reachable;    /* Reachable Time */
 417                 u_int32_t retrans;      /* Retrans Timer */
 418                 u_int32_t flags;        /* Flags */
 419                 int recalctm;           /* BaseReacable re-calculation timer */
 420                 u_int8_t chlim;         /* CurHopLimit */
 421                 /* Number of routers learned on the  interface */
 422                 u_int8_t receivedra;
 423                 /*
 424                  * The current collision count value
 425                  * being used for secure address generation.
 426                  */
 427                 u_int8_t collision_count;
 428         } ndi;
 429 };
 430
 431 #if !defined(BSD_KERNEL_PRIVATE)
 432 struct  in6_ndireq {
 433         char ifname[IFNAMSIZ];
 434         struct nd_ifinfo ndi;
 435 };
 436 #else
 437 struct  in6_ndireq {
 438         char ifname[IFNAMSIZ];
 439         struct nd_ifinfo_compat ndi;
 440 };
 441 #endif /* !BSD_KERNEL_PRIVATE */
 442
 443 struct  in6_ndifreq {
 444         char ifname[IFNAMSIZ];
 445         u_long ifindex;
 446 };
 447
 448 #define MAX_RTR_SOLICITATION_DELAY      1       /* 1sec */
 449 #define RTR_SOLICITATION_INTERVAL       4       /* 4sec */
 450
 451 #if defined(BSD_KERNEL_PRIVATE)
 452 struct  in6_ndifreq_32 {
 453         char ifname[IFNAMSIZ];
 454         u_int32_t ifindex;
 455 };
 456
 457 struct  in6_ndifreq_64 {
 458         char ifname[IFNAMSIZ];
 459         u_int64_t ifindex  __attribute__((aligned(8)));
 460 };
 461 #endif /* BSD_KERNEL_PRIVATE */
 462
 463 /* Prefix status */
 464 #define NDPRF_ONLINK            0x1
 465 #define NDPRF_DETACHED          0x2
 466 #define NDPRF_STATIC            0x100
 467 #define NDPRF_IFSCOPE           0x1000
 468 #define NDPRF_PRPROXY           0x2000
 469 #ifdef BSD_KERNEL_PRIVATE
 470 #define NDPRF_PROCESSED_ONLINK  0x08000
 471 #define NDPRF_PROCESSED_SERVICE 0x10000
 472 #define NDPRF_DEFUNCT           0x20000
 473 #define NDPRF_CLAT46            0x40000
 474
 475 #define CLAT46_COLLISION_COUNT_OFFSET   128
 476 #endif
 477
 478 /* protocol constants */
 479 #define MAX_RTR_SOLICITATION_DELAY      1       /* 1sec */
 480 #define RTR_SOLICITATION_INTERVAL       4       /* 4sec */
 481 #define MAX_RTR_SOLICITATIONS           3
 482
 483 #define ND6_INFINITE_LIFETIME           0xffffffff
 484 #define ND6_MAX_LIFETIME                0x7fffffff
 485
 486 #ifdef BSD_KERNEL_PRIVATE
 487 #define ND_IFINFO(ifp)                          \
 488     ((ifp == NULL) ? NULL :                     \
 489      ((IN6_IFEXTRA(ifp) == NULL) ? NULL :       \
 490       (&IN6_IFEXTRA(ifp)->nd_ifinfo)))
 491
 492 /*
 493  * In a more readable form, we derive linkmtu based on:
 494  *
 495  * if (ifp == NULL)
 496  *         linkmtu = IPV6_MMTU
 497  * else if (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized)
 498  *         linkmtu = ifp->if_mtu;
 499  * else if (ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < ifp->if_mtu)
 500  *         linkmtu = ND_IFINFO(ifp)->linkmtu;
 501  * else if ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < ifp->if_mtu))
 502  *         linkmtu = ND_IFINFO(ifp)->maxmtu;
 503  * else
 504  *         linkmtu = ifp->if_mtu;
 505  */
 506 #define IN6_LINKMTU(ifp)                                                      \
 507         (ifp == NULL ? IPV6_MMTU :                                            \
 508         (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized) ?            \
 509         (ifp)->if_mtu : ((ND_IFINFO(ifp)->linkmtu &&                          \
 510         ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) ? ND_IFINFO(ifp)->linkmtu :  \
 511         ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) ? \
 512         ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)))
 513
 514 /* node constants */
 515 #define MAX_REACHABLE_TIME              3600000 /* msec */
 516 #define REACHABLE_TIME                  30000   /* msec */
 517 #define RETRANS_TIMER                   1000    /* msec */
 518 #define MIN_RANDOM_FACTOR               512     /* 1024 * 0.5 */
 519 #define MAX_RANDOM_FACTOR               1536    /* 1024 * 1.5 */
 520 #define DEF_TEMP_VALID_LIFETIME         604800  /* 1 week */
 521 #define DEF_TEMP_PREFERRED_LIFETIME     86400   /* 1 day */
 522 #define TEMPADDR_REGEN_ADVANCE          5       /* sec */
 523 #define MAX_TEMP_DESYNC_FACTOR          600     /* 10 min */
 524 #define ND_COMPUTE_RTIME(x) \
 525                 (((MIN_RANDOM_FACTOR * (x >> 10)) + (RandomULong() & \
 526                 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
 527
 528 #define IP6_USE_TMPADDR_DEFAULT         1
 529 /* prefix expiry times */
 530 #define ND6_PREFIX_EXPIRY_UNSPEC        -1
 531 #define ND6_PREFIX_EXPIRY_NEVER         0
 532
 533 TAILQ_HEAD(nd_drhead, nd_defrouter);
 534 struct  nd_defrouter {
 535         decl_lck_mtx_data(, nddr_lock);
 536         decl_lck_mtx_data(, nddr_ref_lock);
 537         TAILQ_ENTRY(nd_defrouter) dr_entry;
 538         struct in6_addr rtaddr;
 539         u_int32_t       nddr_refcount;
 540         u_int32_t       nddr_debug;
 541         u_int64_t       expire;
 542         u_int64_t       base_calendartime;      /* calendar time at creation */
 543         u_int64_t       base_uptime;            /* uptime at creation */
 544         u_char          flags;                  /* flags on RA message */
 545         u_char          stateflags;
 546         u_int32_t       rtlifetime;
 547         int             err;
 548         struct ifnet    *ifp;
 549         struct in6_addr rtaddr_mapped;          /* Mapped gateway address for routing */
 550         void (*nddr_trace)(struct nd_defrouter *, int); /* trace callback fn */
 551 };
 552
 553 #define NDDR_LOCK_ASSERT_HELD(_nddr)                                    \
 554         LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_OWNED)
 555
 556 #define NDDR_LOCK_ASSERT_NOTHELD(_nddr)                                 \
 557         LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_NOTOWNED)
 558
 559 #define NDDR_LOCK(_nddr)                                                \
 560         lck_mtx_lock(&(_nddr)->nddr_lock)
 561
 562 #define NDDR_LOCK_SPIN(_nddr)                                           \
 563         lck_mtx_lock_spin(&(_nddr)->nddr_lock)
 564
 565 #define NDDR_CONVERT_LOCK(_nddr) do {                                   \
 566         NDPR_LOCK_ASSERT_HELD(_nddr);                                   \
 567         lck_mtx_convert_spin(&(_nddr)->nddr_lock);                      \
 568 } while (0)
 569
 570 #define NDDR_UNLOCK(_nddr)                                              \
 571         lck_mtx_unlock(&(_nddr)->nddr_lock)
 572
 573 #define NDDR_REF_LOCK(_nddr)                                            \
 574         lck_mtx_lock(&(_nddr)->nddr_ref_lock)
 575
 576 #define NDDR_REF_LOCK_SPIN(_nddr)                                       \
 577         lck_mtx_lock_spin(&(_nddr)->nddr_ref_lock)
 578
 579 #define NDDR_REF_UNLOCK(_nddr)                                          \
 580         lck_mtx_unlock(&(_nddr)->nddr_ref_lock)
 581
 582 #define NDDR_ADDREF(_nddr)                                              \
 583         nddr_addref(_nddr)
 584
 585 #define NDDR_REMREF(_nddr)                                              \
 586         nddr_remref(_nddr)                                              \
 587
 588 TAILQ_HEAD(nd_rtihead, nd_route_info);
 589 /*
 590  * The ordering below is important and it should always start
 591  * with nd_drhead as the first element.
 592  * It gets passed in as the generic nd_drhead to router management code.
 593  * The extra information stored here includes the prefix/prefix-length
 594  * which the router list belongs to.
 595  */
 596 struct nd_route_info {
 597         struct nd_drhead nd_rti_router_list;
 598         TAILQ_ENTRY(nd_route_info) nd_rti_entry;
 599         struct in6_addr nd_rti_prefix;
 600         u_int8_t nd_rti_prefixlen;
 601 };
 602
 603 struct nd_route_info *ndrti_alloc(void);
 604 void nd6_rti_list_wait(const char *);
 605 void nd6_rti_list_signal_done(void);
 606 void ndrti_free(struct nd_route_info *rti);
 607 void nd6_rtilist_remove(struct nd_route_info *);
 608 void nd6_rtilist_update(struct nd_route_info *, struct nd_defrouter *);
 609 int nd6_rtilist_add(struct nd_route_info *, struct nd_defrouter *,
 610     struct nd_route_info **);
 611 void nd6_rti_purge(struct nd_route_info *);
 612
 613 /* define struct prproxy_sols_tree */
 614 RB_HEAD(prproxy_sols_tree, nd6_prproxy_soltgt);
 615
 616 struct nd_prefix {
 617         decl_lck_mtx_data(, ndpr_lock);
 618         decl_lck_mtx_data(, ndpr_ref_lock);
 619         u_int32_t       ndpr_refcount;  /* reference count */
 620         u_int32_t       ndpr_debug;     /* see ifa_debug flags */
 621         struct ifnet     *ndpr_ifp;
 622         struct rtentry   *ndpr_rt;
 623         LIST_ENTRY(nd_prefix) ndpr_entry;
 624         struct sockaddr_in6 ndpr_prefix; /* prefix */
 625         struct in6_addr ndpr_mask; /* netmask derived from the prefix */
 626         struct in6_addr ndpr_addr; /* address that is derived from the prefix */
 627         u_int32_t       ndpr_vltime;    /* advertised valid lifetime */
 628         u_int32_t       ndpr_pltime;    /* advertised preferred lifetime */
 629         u_int64_t       ndpr_preferred; /* preferred time of the prefix */
 630         u_int64_t       ndpr_expire;    /* expiration time of the prefix */
 631         u_int64_t       ndpr_lastupdate; /* rx time of last advertisement */
 632         u_int64_t       ndpr_base_calendartime; /* calendar time at creation */
 633         u_int64_t       ndpr_base_uptime;       /* uptime at creation */
 634         struct prf_ra   ndpr_flags;
 635         unsigned int    ndpr_genid;     /* protects ndpr_advrtrs */
 636         u_int32_t       ndpr_stateflags; /* actual state flags */
 637         /* list of routers that advertise the prefix: */
 638         LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
 639         u_char          ndpr_plen;
 640         int             ndpr_addrcnt;   /* reference counter from addresses */
 641         u_int32_t       ndpr_allmulti_cnt;      /* total all-multi reqs */
 642         u_int32_t       ndpr_prproxy_sols_cnt;  /* total # of proxied NS */
 643         struct prproxy_sols_tree ndpr_prproxy_sols; /* tree of proxied NS */
 644         void (*ndpr_trace)(struct nd_prefix *, int); /* trace callback fn */
 645 };
 646
 647 #define ndpr_next               ndpr_entry.le_next
 648
 649 #define ndpr_raf                ndpr_flags
 650 #define ndpr_raf_onlink         ndpr_flags.onlink
 651 #define ndpr_raf_auto           ndpr_flags.autonomous
 652 #define ndpr_raf_router         ndpr_flags.router
 653 /*
 654  * We keep expired prefix for certain amount of time, for validation purposes.
 655  * 1800s = MaxRtrAdvInterval
 656  */
 657 #define NDPR_KEEP_EXPIRED       (1800 * 2)
 658
 659 #define NDPR_LOCK_ASSERT_HELD(_ndpr)                                    \
 660         LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_OWNED)
 661
 662 #define NDPR_LOCK_ASSERT_NOTHELD(_ndpr)                                 \
 663         LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_NOTOWNED)
 664
 665 #define NDPR_LOCK(_ndpr)                                                \
 666         lck_mtx_lock(&(_ndpr)->ndpr_lock)
 667
 668 #define NDPR_LOCK_SPIN(_ndpr)                                           \
 669         lck_mtx_lock_spin(&(_ndpr)->ndpr_lock)
 670
 671 #define NDPR_CONVERT_LOCK(_ndpr) do {                                   \
 672         NDPR_LOCK_ASSERT_HELD(_ndpr);                                   \
 673         lck_mtx_convert_spin(&(_ndpr)->ndpr_lock);                      \
 674 } while (0)
 675
 676 #define NDPR_UNLOCK(_ndpr)                                              \
 677         lck_mtx_unlock(&(_ndpr)->ndpr_lock)
 678
 679 #define NDPR_REF_LOCK(_ndpr)                                            \
 680         lck_mtx_lock(&(_ndpr)->ndpr_ref_lock)
 681
 682 #define NDPR_REF_LOCK_SPIN(_ndpr)                                       \
 683         lck_mtx_lock_spin(&(_ndpr)->ndpr_ref_lock)
 684
 685 #define NDPR_REF_UNLOCK(_ndpr)                                          \
 686         lck_mtx_unlock(&(_ndpr)->ndpr_ref_lock)
 687
 688 #define NDPR_ADDREF(_ndpr)                                              \
 689         ndpr_addref(_ndpr)
 690
 691 #define NDPR_REMREF(_ndpr)                                              \
 692         ndpr_remref(_ndpr)                                              \
 693
 694 /*
 695  * Message format for use in obtaining information about prefixes
 696  * from inet6 sysctl function
 697  */
 698 struct inet6_ndpr_msghdr {
 699         u_short inpm_msglen;    /* to skip over non-understood messages */
 700         u_char  inpm_version;   /* future binary compatibility */
 701         u_char  inpm_type;      /* message type */
 702         struct in6_addr inpm_prefix;
 703         u_int32_t       prm_vltim;
 704         u_int32_t       prm_pltime;
 705         u_int32_t       prm_expire;
 706         u_int32_t       prm_preferred;
 707         struct in6_prflags prm_flags;
 708         u_short prm_index;      /* index for associated ifp */
 709         u_char  prm_plen;       /* length of prefix in bits */
 710 };
 711
 712 #define prm_raf_onlink          prm_flags.prf_ra.onlink
 713 #define prm_raf_auto            prm_flags.prf_ra.autonomous
 714
 715 #define prm_statef_onlink       prm_flags.prf_state.onlink
 716
 717 #define prm_rrf_decrvalid       prm_flags.prf_rr.decrvalid
 718 #define prm_rrf_decrprefd       prm_flags.prf_rr.decrprefd
 719
 720 struct nd_pfxrouter {
 721         LIST_ENTRY(nd_pfxrouter) pfr_entry;
 722 #define pfr_next pfr_entry.le_next
 723         struct nd_defrouter *router;
 724 };
 725
 726 LIST_HEAD(nd_prhead, nd_prefix);
 727
 728 struct nd_prefix_list {
 729         struct nd_prefix_list *next;
 730         struct nd_prefix pr;
 731 };
 732 #endif /* BSD_KERNEL_PRIVATE */
 733
 734 #if defined(PRIVATE)
 735 struct kev_nd6_ndfailure {
 736         struct net_event_data link_data;
 737 };
 738
 739 struct kev_nd6_ndalive {
 740         struct net_event_data link_data;
 741 };
 742
 743 struct nd6_ra_prefix {
 744         struct sockaddr_in6 prefix;
 745         struct prf_ra raflags;
 746         u_int32_t prefixlen;
 747         u_int32_t origin;
 748         u_int64_t vltime;
 749         u_int64_t pltime;
 750         u_int64_t expire;
 751         u_int32_t flags;
 752         u_int32_t refcnt;
 753         u_int32_t if_index;
 754         u_int32_t pad;
 755 };
 756
 757 /* ND6 router advertisement valid bits */
 758 #define KEV_ND6_DATA_VALID_MTU          (0x1 << 0)
 759 #define KEV_ND6_DATA_VALID_PREFIX       (0x1 << 1)
 760
 761 struct kev_nd6_ra_data {
 762         u_int32_t mtu;
 763         u_int32_t list_index;
 764         u_int32_t list_length;
 765         u_int32_t flags;
 766         struct nd6_ra_prefix prefix;
 767         u_int32_t pad;
 768 };
 769
 770 struct kev_nd6_event {
 771         struct net_event_data link_data;
 772         struct in6_addr in6_address;
 773         uint32_t val;
 774 };
 775
 776 struct nd6_lookup_ipv6_args {
 777         char ifname[IFNAMSIZ];
 778         struct sockaddr_in6 ip6_dest;
 779         u_int32_t ll_dest_len;
 780         union {
 781                 char buffer[256];
 782                 struct sockaddr_dl _sdl;
 783         } ll_dest_;
 784 };
 785 #define ll_dest_sdl ll_dest_._sdl
 786
 787 #endif /* PRIVATE */
 788
 789 #if defined(BSD_KERNEL_PRIVATE)
 790 /* nd6.c */
 791 extern int nd6_prune;
 792 extern int nd6_prune_lazy;
 793 extern int nd6_delay;
 794 extern int nd6_umaxtries;
 795 extern int nd6_mmaxtries;
 796 extern int nd6_useloopback;
 797 extern int nd6_accept_6to4;
 798 extern int nd6_maxnudhint;
 799 extern int nd6_gctimer;
 800 extern struct llinfo_nd6 llinfo_nd6;
 801 extern struct nd_drhead nd_defrouter_list;
 802 extern struct nd_rtihead nd_rti_list;
 803 extern struct nd_prhead nd_prefix;
 804 extern int nd6_debug;
 805 extern int nd6_onlink_ns_rfc4861;
 806 extern int nd6_optimistic_dad;
 807
 808 #include <os/log.h>
 809
 810 #define nd6log0(type, ...)      do { os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0)
 811 #define nd6log(type, ...)       do { if (nd6_debug >= 1) os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0)
 812 #define nd6log2(type, ...)      do { if (nd6_debug >= 2) os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0)
 813
 814 #define ND6_OPTIMISTIC_DAD_LINKLOCAL    (1 << 0)
 815 #define ND6_OPTIMISTIC_DAD_AUTOCONF     (1 << 1)
 816 #define ND6_OPTIMISTIC_DAD_TEMPORARY    (1 << 2)
 817 #define ND6_OPTIMISTIC_DAD_DYNAMIC      (1 << 3)
 818 #define ND6_OPTIMISTIC_DAD_SECURED      (1 << 4)
 819 #define ND6_OPTIMISTIC_DAD_MANUAL       (1 << 5)
 820
 821 #define ND6_OPTIMISTIC_DAD_DEFAULT                                      \
 822         (ND6_OPTIMISTIC_DAD_LINKLOCAL | ND6_OPTIMISTIC_DAD_AUTOCONF |   \
 823          ND6_OPTIMISTIC_DAD_TEMPORARY | ND6_OPTIMISTIC_DAD_DYNAMIC |    \
 824          ND6_OPTIMISTIC_DAD_SECURED | ND6_OPTIMISTIC_DAD_MANUAL)
 825
 826 /* nd6_rtr.c */
 827 extern int nd6_defifindex;
 828 extern int ip6_desync_factor;   /* seconds */
 829 /* ND6_INFINITE_LIFETIME does not apply to temporary addresses */
 830 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
 831 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
 832 extern int ip6_temp_regen_advance; /* seconds */
 833
 834 union nd_opts {
 835         struct nd_opt_hdr *nd_opt_array[26];    /* max = Route information option */
 836         struct {
 837                 struct nd_opt_hdr *zero;
 838                 struct nd_opt_hdr *src_lladdr;
 839                 struct nd_opt_hdr *tgt_lladdr;
 840                 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
 841                 struct nd_opt_rd_hdr *rh;
 842                 struct nd_opt_mtu *mtu;
 843                 struct nd_opt_hdr *__res6;
 844                 struct nd_opt_hdr *__res7;
 845                 struct nd_opt_hdr *__res8;
 846                 struct nd_opt_hdr *__res9;
 847                 struct nd_opt_hdr *__res10;
 848                 struct nd_opt_hdr *__res11;
 849                 struct nd_opt_hdr *__res12;
 850                 struct nd_opt_hdr *__res13;
 851                 struct nd_opt_nonce *nonce;
 852                 struct nd_opt_hdr *__res15;
 853                 struct nd_opt_hdr *__res16;
 854                 struct nd_opt_hdr *__res17;
 855                 struct nd_opt_hdr *__res18;
 856                 struct nd_opt_hdr *__res19;
 857                 struct nd_opt_hdr *__res20;
 858                 struct nd_opt_hdr *__res21;
 859                 struct nd_opt_hdr *__res22;
 860                 struct nd_opt_hdr *__res23;
 861                 struct nd_opt_route_info *rti_beg;
 862                 struct nd_opt_hdr *__res25;
 863                 struct nd_opt_hdr *search;      /* multiple opts */
 864                 struct nd_opt_hdr *last;        /* multiple opts */
 865                 int done;
 866                 struct nd_opt_prefix_info *pi_end; /* multiple prefix opts, end */
 867                 struct nd_opt_route_info *rti_end; /* multiple route info opts, end */
 868         } nd_opt_each;
 869 };
 870 #define nd_opts_src_lladdr      nd_opt_each.src_lladdr
 871 #define nd_opts_tgt_lladdr      nd_opt_each.tgt_lladdr
 872 #define nd_opts_pi              nd_opt_each.pi_beg
 873 #define nd_opts_pi_end          nd_opt_each.pi_end
 874 #define nd_opts_rh              nd_opt_each.rh
 875 #define nd_opts_mtu             nd_opt_each.mtu
 876 #define nd_opts_nonce           nd_opt_each.nonce
 877 #define nd_opts_rti             nd_opt_each.rti_beg
 878 #define nd_opts_rti_end         nd_opt_each.rti_end
 879 #define nd_opts_search          nd_opt_each.search
 880 #define nd_opts_last            nd_opt_each.last
 881 #define nd_opts_done            nd_opt_each.done
 882
 883 /* XXX: need nd6_var.h?? */
 884 /* nd6.c */
 885 extern int nd6_sched_timeout_want;
 886 extern void nd6_sched_timeout(struct timeval *, struct timeval *);
 887 extern void nd6_init(void);
 888 extern void nd6_ifreset(struct ifnet *ifp);
 889 extern void nd6_ifattach(struct ifnet *);
 890 extern int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *, int);
 891 extern void nd6_option_init(void *, int, union nd_opts *);
 892 extern struct nd_opt_hdr *nd6_option(union nd_opts *);
 893 extern int nd6_options(union nd_opts *);
 894 extern struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, int);
 895 extern void nd6_setmtu(struct ifnet *);
 896 extern void nd6_purge(struct ifnet *);
 897 extern void nd6_free(struct rtentry *);
 898 extern void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
 899 extern int nd6_resolve(struct ifnet *, struct rtentry *,
 900     struct mbuf *, struct sockaddr *, u_char *);
 901 extern void nd6_rtrequest(int, struct rtentry *, struct sockaddr *);
 902 extern int nd6_ioctl(u_long, caddr_t, struct ifnet *);
 903 extern void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
 904     char *, int, int, int);
 905 extern int nd6_output_list(struct ifnet *, struct ifnet *, struct mbuf *,
 906     struct sockaddr_in6 *, struct rtentry *, struct flowadv *);
 907 extern int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *,
 908     struct sockaddr_in6 *, struct rtentry *, struct flowadv *);
 909 extern int nd6_storelladdr(struct ifnet *, struct rtentry *, struct mbuf *,
 910     struct sockaddr *, u_char *);
 911 extern int nd6_need_cache(struct ifnet *);
 912 extern void nd6_drain(void *);
 913 extern void nd6_post_msg(u_int32_t, struct nd_prefix_list *, u_int32_t,
 914     u_int32_t);
 915 extern int nd6_setifinfo(struct ifnet *, u_int32_t, u_int32_t);
 916 extern const char *ndcache_state2str(short);
 917 extern void ln_setexpire(struct llinfo_nd6 *, uint64_t);
 918
 919 /* nd6_nbr.c */
 920 extern void nd6_nbr_init(void);
 921 extern void nd6_na_input(struct mbuf *, int, int);
 922 extern void nd6_na_output(struct ifnet *, const struct in6_addr *,
 923     const struct in6_addr *, u_int32_t, int, struct sockaddr *);
 924 extern void nd6_ns_input(struct mbuf *, int, int);
 925 extern void nd6_ns_output(struct ifnet *, const struct in6_addr *,
 926     const struct in6_addr *, struct llinfo_nd6 *, uint8_t *);
 927 extern caddr_t nd6_ifptomac(struct ifnet *);
 928 extern void nd6_dad_start(struct ifaddr *, int *);
 929 extern void nd6_dad_stop(struct ifaddr *);
 930 extern void nd6_llreach_alloc(struct rtentry *, struct ifnet *, void *,
 931     unsigned int, boolean_t);
 932 extern void nd6_llreach_set_reachable(struct ifnet *, void *, unsigned int);
 933 extern void nd6_llreach_use(struct llinfo_nd6 *);
 934 extern void nd6_alt_node_addr_decompose(struct ifnet *, struct sockaddr *,
 935     struct sockaddr_dl *, struct sockaddr_in6 *);
 936 extern int nd6_alt_node_present(struct ifnet *, struct sockaddr_in6 *,
 937     struct sockaddr_dl *, int32_t, int, int);
 938 extern void nd6_alt_node_absent(struct ifnet *, struct sockaddr_in6 *, struct sockaddr_dl *);
 939
 940 /* nd6_rtr.c */
 941 extern struct in6_ifaddr *in6_pfx_newpersistaddr(struct nd_prefix *, int,
 942     int *, boolean_t, uint8_t);
 943 extern void nd6_rtr_init(void);
 944 extern void nd6_rs_input(struct mbuf *, int, int);
 945 extern void nd6_ra_input(struct mbuf *, int, int);
 946 extern void prelist_del(struct nd_prefix *);
 947 extern struct nd_defrouter *defrtrlist_update(struct nd_defrouter *,
 948     struct nd_drhead *);
 949 extern void defrouter_select(struct ifnet *, struct nd_drhead *);
 950 extern void defrouter_reset(void);
 951 extern int defrtrlist_ioctl(u_long, caddr_t);
 952 extern void defrtrlist_del(struct nd_defrouter *, struct nd_drhead *);
 953 extern int defrtrlist_add_static(struct nd_defrouter *);
 954 extern int defrtrlist_del_static(struct nd_defrouter *);
 955 extern void prelist_remove(struct nd_prefix *);
 956 extern int prelist_update(struct nd_prefix *, struct nd_defrouter *,
 957     struct mbuf *, int);
 958 extern int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *,
 959     struct nd_prefix **, boolean_t);
 960 extern int nd6_prefix_onlink(struct nd_prefix *);
 961 extern int nd6_prefix_onlink_scoped(struct nd_prefix *, unsigned int);
 962 extern int nd6_prefix_offlink(struct nd_prefix *);
 963 extern void pfxlist_onlink_check(void);
 964 extern struct nd_defrouter *defrouter_lookup(struct nd_drhead *,
 965     struct in6_addr *, struct ifnet *);
 966 extern struct nd_prefix *nd6_prefix_lookup(struct nd_prefix *, int);
 967 extern int in6_init_prefix_ltimes(struct nd_prefix *ndpr);
 968 extern void rt6_flush(struct in6_addr *, struct ifnet *);
 969 extern int nd6_setdefaultiface(int);
 970 extern int in6_tmpifadd(const struct in6_ifaddr *, int);
 971 extern void nddr_addref(struct nd_defrouter *);
 972 extern struct nd_defrouter *nddr_remref(struct nd_defrouter *);
 973 extern uint64_t nddr_getexpire(struct nd_defrouter *);
 974 extern void ndpr_addref(struct nd_prefix *);
 975 extern struct nd_prefix *ndpr_remref(struct nd_prefix *);
 976 extern uint64_t ndpr_getexpire(struct nd_prefix *);
 977
 978 /* nd6_prproxy.c */
 979 struct ip6_hdr;
 980 extern u_int32_t nd6_prproxy;
 981 extern int nd6_if_prproxy(struct ifnet *, boolean_t);
 982 extern void nd6_prproxy_prelist_update(struct nd_prefix *, struct nd_prefix *);
 983 extern boolean_t nd6_prproxy_ifaddr(struct in6_ifaddr *);
 984 extern void nd6_proxy_find_fwdroute(struct ifnet *, struct route_in6 *);
 985 extern boolean_t nd6_prproxy_isours(struct mbuf *, struct ip6_hdr *,
 986     struct route_in6 *, unsigned int);
 987 extern void nd6_prproxy_ns_output(struct ifnet *, struct ifnet *,
 988     struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *);
 989 extern void nd6_prproxy_ns_input(struct ifnet *, struct in6_addr *,
 990     char *, int, struct in6_addr *, struct in6_addr *, uint8_t *nonce);
 991 extern void nd6_prproxy_na_input(struct ifnet *, struct in6_addr *,
 992     struct in6_addr *, struct in6_addr *, int);
 993 extern void nd6_prproxy_sols_reap(struct nd_prefix *);
 994 extern void nd6_prproxy_sols_prune(struct nd_prefix *, u_int32_t);
 995 extern int nd6_if_disable(struct ifnet *, boolean_t);
 996 void in6_ifaddr_set_dadprogress(struct in6_ifaddr *ia);
 997 #endif /* BSD_KERNEL_PRIVATE */
 998
 999 #ifdef KERNEL
1000
1001 /*
1002  *      @function nd6_lookup_ipv6
1003  *      @discussion This function will check the routing table for a cached
1004  *              neighbor discovery entry or trigger an neighbor discovery query
1005  *              to resolve the IPv6 address to a link-layer address.
1006  *              nd entries are stored in the routing table. This function will
1007  *              lookup the IPv6 destination in the routing table. If the
1008  *              destination requires forwarding to a gateway, the route of the
1009  *              gateway will be looked up. The route entry is inspected to
1010  *              determine if the link layer destination address is known. If
1011  *              unknown, neighbor discovery will be used to resolve the entry.
1012  *      @param interface The interface the packet is being sent on.
1013  *      @param ip6_dest The IPv6 destination of the packet.
1014  *      @param ll_dest On output, the link-layer destination.
1015  *      @param ll_dest_len The length of the buffer for ll_dest.
1016  *      @param hint Any routing hint passed down from the protocol.
1017  *      @param packet The packet being transmitted.
1018  *      @result May return an error such as EHOSTDOWN or ENETUNREACH. If
1019  *              this function returns EJUSTRETURN, the packet has been queued
1020  *              and will be sent when the address is resolved. If any other
1021  *              value is returned, the caller is responsible for disposing of
1022  *              the packet.
1023  */
1024 extern errno_t nd6_lookup_ipv6(ifnet_t interface,
1025     const struct sockaddr_in6 *ip6_dest, struct sockaddr_dl *ll_dest,
1026     size_t ll_dest_len, route_t hint, mbuf_t packet);
1027
1028 #endif /* KERNEL */
1029
1030 /* nd6_send.c */
1031 #ifdef BSD_KERNEL_PRIVATE
1032 /*
1033  * nd6_send_opmode
1034  *
1035  *      value   using CGA       tx SEND         rx SEND
1036  *   --------   ---------       -------         -------
1037  *   DISABLED          NO            NO              NO
1038  *      QUIET         YES            NO              NO
1039  */
1040 extern int nd6_send_opstate;
1041
1042 #define ND6_SEND_OPMODE_DISABLED        0
1043 #define ND6_SEND_OPMODE_CGA_QUIET       1
1044
1045 #endif /* BSD_KERNEL_PRIVATE */
1046 #endif /* _NETINET6_ND6_H_ */