1 /* 2 * Copyright (c) 2000-2022 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 #include <sys/sdt.h> 76 77 struct llinfo_nd6 { 78 /* 79 * The following are protected by rnh_lock 80 */ 81 struct llinfo_nd6 *ln_next; 82 struct llinfo_nd6 *ln_prev; 83 struct rtentry *ln_rt; 84 /* 85 * The following are protected by rt_lock 86 */ 87 struct ifnet *ln_exclifp; /* excluded interface (prefix proxy) */ 88 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 89 uint32_t ln_asked; /* # of queries already sent for this addr */ 90 short ln_state; /* reachability state */ 91 short ln_router; /* 2^0: ND6 router bit */ 92 u_int32_t ln_flags; /* flags; see below */ 93 u_int64_t ln_expire; /* lifetime for NDP state transition */ 94 u_int64_t ln_lastused; /* last used timestamp */ 95 struct if_llreach *ln_llreach; /* link-layer reachability record */ 96 }; 97 98 /* Values for ln_flags */ 99 #define ND6_LNF_TIMER_SKIP 0x1 /* modified by nd6_timer() */ 100 #define ND6_LNF_IN_USE 0x2 /* currently in llinfo_nd6 list */ 101 #endif /* BSD_KERNEL_PRIVATE */ 102 103 #define ND6_LLINFO_PURGE -3 104 #define ND6_LLINFO_NOSTATE -2 105 /* 106 * We don't need the WAITDELETE state any more, but we keep the definition 107 * in a comment line instead of removing it. This is necessary to avoid 108 * unintentionally reusing the value for another purpose, which might 109 * affect backward compatibility with old applications. 110 * (20000711 [email protected]) 111 */ 112 /* #define ND6_LLINFO_WAITDELETE -1 */ 113 #define ND6_LLINFO_INCOMPLETE 0 114 #define ND6_LLINFO_REACHABLE 1 115 #define ND6_LLINFO_STALE 2 116 #define ND6_LLINFO_DELAY 3 117 #define ND6_LLINFO_PROBE 4 118 119 #ifdef BSD_KERNEL_PRIVATE 120 121 #define ND6_CACHE_STATE_TRANSITION(ln, nstate) do {\ 122 DTRACE_IP2(nd6_state_transition, struct llinfo_nd6 *, (ln), int, (nstate));\ 123 if (nd6_debug >= 1) {\ 124 struct rtentry *ln_rt = (ln) != NULL ? (ln)->ln_rt : NULL; \ 125 nd6log(info,\ 126 "[%s:%d]: NDP cache entry changed from %s -> %s for address %s.\n",\ 127 __func__,\ 128 __LINE__,\ 129 ndcache_state2str((ln)->ln_state),\ 130 ndcache_state2str((nstate)),\ 131 ln_rt != NULL ? ip6_sprintf(&SIN6(rt_key(ln_rt))->sin6_addr) : "N/A");\ 132 }\ 133 if ((ln) != NULL) {\ 134 if ((ln)->ln_rt != NULL && (ln)->ln_rt->rt_ifp != NULL &&\ 135 ((ln)->ln_rt->rt_ifp->if_eflags & IFEF_IPV6_ND6ALT) &&\ 136 ((ln)->ln_state == ND6_LLINFO_REACHABLE)) {\ 137 VERIFY((nstate) != ND6_LLINFO_STALE &&\ 138 (nstate) != ND6_LLINFO_DELAY &&\ 139 (nstate) != ND6_LLINFO_PROBE);\ 140 }\ 141 (ln)->ln_state = (nstate);\ 142 }\ 143 } while(0) 144 145 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 146 #define ND6_LLINFO_PERMANENT(n) \ 147 (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 148 149 #define ND6_EUI64_GBIT 0x01 150 #define ND6_EUI64_UBIT 0x02 151 152 #define ND6_EUI64_TO_IFID(in6) \ 153 do {(in6)->s6_addr[8] ^= ND6_EUI64_UBIT; } while (0) 154 155 #define ND6_EUI64_GROUP(in6) ((in6)->s6_addr[8] & ND6_EUI64_GBIT) 156 #define ND6_EUI64_INDIVIDUAL(in6) (!ND6_EUI64_GROUP(in6)) 157 #define ND6_EUI64_LOCAL(in6) ((in6)->s6_addr[8] & ND6_EUI64_UBIT) 158 #define ND6_EUI64_UNIVERSAL(in6) (!ND6_EUI64_LOCAL(in6)) 159 #define ND6_IFID_LOCAL(in6) (!ND6_EUI64_LOCAL(in6)) 160 #define ND6_IFID_UNIVERSAL(in6) (!ND6_EUI64_UNIVERSAL(in6)) 161 #endif /* BSD_KERNEL_PRIVATE */ 162 163 #if !defined(BSD_KERNEL_PRIVATE) 164 struct nd_ifinfo { 165 #else 166 /* For binary compatibility, this structure must not change */ 167 /* NOTE: nd_ifinfo is defined in nd6_var.h */ 168 struct nd_ifinfo_compat { 169 #endif /* !BSD_KERNEL_PRIVATE */ 170 u_int32_t linkmtu; /* LinkMTU */ 171 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 172 u_int32_t basereachable; /* BaseReachableTime */ 173 u_int32_t reachable; /* Reachable Time */ 174 u_int32_t retrans; /* Retrans Timer */ 175 u_int32_t flags; /* Flags */ 176 int recalctm; /* BaseReacable re-calculation timer */ 177 u_int8_t chlim; /* CurHopLimit */ 178 u_int8_t receivedra; 179 /* the following 3 members are for privacy extension for addrconf */ 180 u_int8_t randomseed0[8]; /* upper 64 bits of SHA256 digest */ 181 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 182 u_int8_t randomid[8]; /* current random ID */ 183 }; 184 185 #define ND6_IFF_PERFORMNUD 0x1 186 #if defined(PRIVATE) 187 188 /* 189 * APPLE: not used. Interface specific router advertisements are handled with a 190 * specific ifnet flag: IFEF_ACCEPT_RTADVD 191 */ 192 #define ND6_IFF_ACCEPT_RTADV 0x2 193 194 /* APPLE: NOT USED not related to ND. */ 195 #define ND6_IFF_PREFER_SOURCE 0x4 196 197 /* IPv6 operation is disabled due to * DAD failure. (XXX: not ND-specific) */ 198 #define ND6_IFF_IFDISABLED 0x8 199 200 #define ND6_IFF_DONT_SET_IFROUTE 0x10 /* NOT USED */ 201 #endif /* PRIVATE */ 202 #define ND6_IFF_PROXY_PREFIXES 0x20 203 #define ND6_IFF_IGNORE_NA 0x40 204 #if defined(PRIVATE) 205 #define ND6_IFF_INSECURE 0x80 206 #endif 207 #define ND6_IFF_REPLICATED 0x100 /* sleep proxy registered */ 208 #define ND6_IFF_DAD 0x200 /* Perform DAD on the interface */ 209 210 extern int dad_enhanced; 211 #define ND6_DAD_ENHANCED_DEFAULT 1 212 213 struct in6_nbrinfo { 214 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 215 struct in6_addr addr; /* IPv6 address of the neighbor */ 216 long asked; /* # of queries already sent for this addr */ 217 int isrouter; /* if it acts as a router */ 218 int state; /* reachability state */ 219 int expire; /* lifetime for NDP state transition */ 220 }; 221 222 #if defined(BSD_KERNEL_PRIVATE) 223 struct in6_nbrinfo_32 { 224 char ifname[IFNAMSIZ]; 225 struct in6_addr addr; 226 u_int32_t asked; 227 int isrouter; 228 int state; 229 int expire; 230 }; 231 232 struct in6_nbrinfo_64 { 233 char ifname[IFNAMSIZ]; 234 struct in6_addr addr; 235 long asked; 236 int isrouter __attribute__((aligned(8))); 237 int state; 238 int expire; 239 } __attribute__((aligned(8))); 240 #endif /* BSD_KERNEL_PRIVATE */ 241 242 #define DRLSTSIZ 10 243 #define PRLSTSIZ 10 244 245 struct in6_drlist { 246 char ifname[IFNAMSIZ]; 247 struct { 248 struct in6_addr rtaddr; 249 u_char flags; 250 u_short rtlifetime; 251 u_long expire; 252 u_short if_index; 253 } defrouter[DRLSTSIZ]; 254 }; 255 256 #if defined(BSD_KERNEL_PRIVATE) 257 #define ND6_PROCESS_RTI_ENABLE 1 258 #define ND6_PROCESS_RTI_DISABLE 0 259 #define ND6_PROCESS_RTI_DEFAULT ND6_PROCESS_RTI_ENABLE 260 261 extern int nd6_process_rti; 262 263 struct in6_drlist_32 { 264 char ifname[IFNAMSIZ]; 265 struct { 266 struct in6_addr rtaddr; 267 u_char flags; 268 u_short rtlifetime; 269 u_int32_t expire; 270 u_short if_index; 271 } defrouter[DRLSTSIZ]; 272 }; 273 274 struct in6_drlist_64 { 275 char ifname[IFNAMSIZ]; 276 struct { 277 struct in6_addr rtaddr; 278 u_char flags; 279 u_short rtlifetime; 280 u_long expire __attribute__((aligned(8))); 281 u_short if_index __attribute__((aligned(8))); 282 } defrouter[DRLSTSIZ] __attribute__((aligned(8))); 283 }; 284 #endif /* BSD_KERNEL_PRIVATE */ 285 286 /* valid values for stateflags */ 287 #define NDDRF_INSTALLED 0x01 /* installed in the routing table */ 288 #define NDDRF_IFSCOPE 0x02 /* installed as a scoped route */ 289 #define NDDRF_STATIC 0x04 /* for internal use only */ 290 #define NDDRF_MAPPED 0x08 /* Default router addr is mapped to a different one for routing */ 291 #define NDDRF_INELIGIBLE 0x10 /* Default router entry is ineligible for default router selection */ 292 293 struct in6_defrouter { 294 struct sockaddr_in6 rtaddr; 295 u_char flags; 296 u_char stateflags; 297 u_short rtlifetime; 298 u_long expire; 299 u_short if_index; 300 }; 301 302 #if defined(BSD_KERNEL_PRIVATE) 303 struct in6_defrouter_32 { 304 struct sockaddr_in6 rtaddr; 305 u_char flags; 306 u_char stateflags; 307 u_short rtlifetime; 308 u_int32_t expire; 309 u_short if_index; 310 }; 311 312 struct in6_defrouter_64 { 313 struct sockaddr_in6 rtaddr; 314 u_char flags; 315 u_char stateflags; 316 u_short rtlifetime; 317 u_long expire __attribute__((aligned(8))); 318 u_short if_index __attribute__((aligned(8))); 319 } __attribute__((aligned(8))); 320 #endif /* BSD_KERNEL_PRIVATE */ 321 322 struct in6_prlist { 323 char ifname[IFNAMSIZ]; 324 struct { 325 struct in6_addr prefix; 326 struct prf_ra raflags; 327 u_char prefixlen; 328 u_char origin; 329 u_long vltime; 330 u_long pltime; 331 u_long expire; 332 u_short if_index; 333 u_short advrtrs; /* number of advertisement routers */ 334 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 335 } prefix[PRLSTSIZ]; 336 }; 337 338 #if defined(BSD_KERNEL_PRIVATE) 339 struct in6_prlist_32 { 340 char ifname[IFNAMSIZ]; 341 struct { 342 struct in6_addr prefix; 343 struct prf_ra raflags; 344 u_char prefixlen; 345 u_char origin; 346 u_int32_t vltime; 347 u_int32_t pltime; 348 u_int32_t expire; 349 u_short if_index; 350 u_short advrtrs; 351 struct in6_addr advrtr[DRLSTSIZ]; 352 } prefix[PRLSTSIZ]; 353 }; 354 355 struct in6_prlist_64 { 356 char ifname[IFNAMSIZ]; 357 struct { 358 struct in6_addr prefix; 359 struct prf_ra raflags; 360 u_char prefixlen; 361 u_char origin; 362 u_long vltime __attribute__((aligned(8))); 363 u_long pltime __attribute__((aligned(8))); 364 u_long expire __attribute__((aligned(8))); 365 u_short if_index; 366 u_short advrtrs; 367 u_int32_t pad; 368 struct in6_addr advrtr[DRLSTSIZ]; 369 } prefix[PRLSTSIZ]; 370 }; 371 #endif /* BSD_KERNEL_PRIVATE */ 372 373 struct in6_prefix { 374 struct sockaddr_in6 prefix; 375 struct prf_ra raflags; 376 u_char prefixlen; 377 u_char origin; 378 u_long vltime; 379 u_long pltime; 380 u_long expire; 381 u_int32_t flags; 382 int refcnt; 383 u_short if_index; 384 u_short advrtrs; /* number of advertisement routers */ 385 /* struct sockaddr_in6 advrtr[] */ 386 }; 387 388 #if defined(BSD_KERNEL_PRIVATE) 389 struct in6_prefix_32 { 390 struct sockaddr_in6 prefix; 391 struct prf_ra raflags; 392 u_char prefixlen; 393 u_char origin; 394 u_int32_t vltime; 395 u_int32_t pltime; 396 u_int32_t expire; 397 u_int32_t flags; 398 int refcnt; 399 u_short if_index; 400 u_short advrtrs; /* number of advertisement routers */ 401 /* struct sockaddr_in6 advrtr[] */ 402 }; 403 404 struct in6_prefix_64 { 405 struct sockaddr_in6 prefix; 406 struct prf_ra raflags; 407 u_char prefixlen; 408 u_char origin; 409 u_long vltime __attribute__((aligned(8))); 410 u_long pltime __attribute__((aligned(8))); 411 u_long expire __attribute__((aligned(8))); 412 u_int32_t flags __attribute__((aligned(8))); 413 int refcnt; 414 u_short if_index; 415 u_short advrtrs; 416 /* struct sockaddr_in6 advrtr[] */ 417 }; 418 #endif /* BSD_KERNEL_PRIVATE */ 419 420 struct in6_ondireq { 421 char ifname[IFNAMSIZ]; 422 struct { 423 u_int32_t linkmtu; /* LinkMTU */ 424 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 425 u_int32_t basereachable; /* BaseReachableTime */ 426 u_int32_t reachable; /* Reachable Time */ 427 u_int32_t retrans; /* Retrans Timer */ 428 u_int32_t flags; /* Flags */ 429 int recalctm; /* BaseReacable re-calculation timer */ 430 u_int8_t chlim; /* CurHopLimit */ 431 /* Number of routers learned on the interface */ 432 u_int8_t receivedra; 433 /* 434 * The current collision count value 435 * being used for secure address generation. 436 */ 437 u_int8_t collision_count; 438 } ndi; 439 }; 440 441 #if !defined(BSD_KERNEL_PRIVATE) 442 struct in6_ndireq { 443 char ifname[IFNAMSIZ]; 444 struct nd_ifinfo ndi; 445 }; 446 #else 447 struct in6_ndireq { 448 char ifname[IFNAMSIZ]; 449 struct nd_ifinfo_compat ndi; 450 }; 451 #endif /* !BSD_KERNEL_PRIVATE */ 452 453 struct in6_ndifreq { 454 char ifname[IFNAMSIZ]; 455 u_long ifindex; 456 }; 457 458 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 459 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 460 461 #if defined(BSD_KERNEL_PRIVATE) 462 struct in6_ndifreq_32 { 463 char ifname[IFNAMSIZ]; 464 u_int32_t ifindex; 465 }; 466 467 struct in6_ndifreq_64 { 468 char ifname[IFNAMSIZ]; 469 u_int64_t ifindex __attribute__((aligned(8))); 470 }; 471 #endif /* BSD_KERNEL_PRIVATE */ 472 473 /* Prefix status */ 474 #define NDPRF_ONLINK 0x1 475 #define NDPRF_DETACHED 0x2 476 #define NDPRF_STATIC 0x100 477 #define NDPRF_IFSCOPE 0x1000 478 #define NDPRF_PRPROXY 0x2000 479 #ifdef BSD_KERNEL_PRIVATE 480 #define NDPRF_PROCESSED_ONLINK 0x08000 481 #define NDPRF_PROCESSED_SERVICE 0x10000 482 #define NDPRF_DEFUNCT 0x20000 483 #define NDPRF_CLAT46 0x40000 484 485 #define CLAT46_COLLISION_COUNT_OFFSET 128 486 #endif 487 488 /* protocol constants */ 489 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 490 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 491 #define MAX_RTR_SOLICITATIONS 3 492 493 #define ND6_INFINITE_LIFETIME 0xffffffff 494 #define ND6_MAX_LIFETIME 0x7fffffff 495 496 #ifdef BSD_KERNEL_PRIVATE 497 #define ND_IFINFO(ifp) \ 498 ((ifp == NULL) ? NULL : \ 499 ((IN6_IFEXTRA(ifp) == NULL) ? NULL : \ 500 (&IN6_IFEXTRA(ifp)->nd_ifinfo))) 501 502 /* 503 * In a more readable form, we derive linkmtu based on: 504 * 505 * if (ifp == NULL) 506 * linkmtu = IPV6_MMTU 507 * else if (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized) 508 * linkmtu = ifp->if_mtu; 509 * else if (ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < ifp->if_mtu) 510 * linkmtu = ND_IFINFO(ifp)->linkmtu; 511 * else if ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < ifp->if_mtu)) 512 * linkmtu = ND_IFINFO(ifp)->maxmtu; 513 * else 514 * linkmtu = ifp->if_mtu; 515 */ 516 #define IN6_LINKMTU(ifp) \ 517 (ifp == NULL ? IPV6_MMTU : \ 518 (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized) ? \ 519 (ifp)->if_mtu : ((ND_IFINFO(ifp)->linkmtu && \ 520 ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) ? ND_IFINFO(ifp)->linkmtu : \ 521 ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) ? \ 522 ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))) 523 524 /* node constants */ 525 #define MAX_REACHABLE_TIME 3600000 /* msec */ 526 #define REACHABLE_TIME 30000 /* msec */ 527 #define RETRANS_TIMER 1000 /* msec */ 528 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 529 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 530 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 531 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 532 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 533 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 534 #define ND_COMPUTE_RTIME(x) \ 535 (((MIN_RANDOM_FACTOR * (x >> 10)) + (RandomULong() & \ 536 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 537 538 #define IP6_USE_TMPADDR_DEFAULT 1 539 #define IP6_ULA_USE_TMPADDR_DEFAULT 0 540 /* prefix expiry times */ 541 #define ND6_PREFIX_EXPIRY_UNSPEC -1 542 #define ND6_PREFIX_EXPIRY_NEVER 0 543 544 TAILQ_HEAD(nd_drhead, nd_defrouter); 545 struct nd_defrouter { 546 decl_lck_mtx_data(, nddr_lock); 547 decl_lck_mtx_data(, nddr_ref_lock); 548 TAILQ_ENTRY(nd_defrouter) dr_entry; 549 struct in6_addr rtaddr; 550 u_int32_t nddr_refcount; 551 u_int32_t nddr_debug; 552 u_int64_t expire; 553 u_int64_t base_calendartime; /* calendar time at creation */ 554 u_int64_t base_uptime; /* uptime at creation */ 555 u_char flags; /* flags on RA message */ 556 u_char stateflags; 557 u_int32_t rtlifetime; 558 int err; 559 struct ifnet *ifp; 560 struct in6_addr rtaddr_mapped; /* Mapped gateway address for routing */ 561 boolean_t is_reachable; 562 void (*nddr_trace)(struct nd_defrouter *, int); /* trace callback fn */ 563 }; 564 565 #define NDDR_LOCK_ASSERT_HELD(_nddr) \ 566 LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_OWNED) 567 568 #define NDDR_LOCK_ASSERT_NOTHELD(_nddr) \ 569 LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_NOTOWNED) 570 571 #define NDDR_LOCK(_nddr) \ 572 lck_mtx_lock(&(_nddr)->nddr_lock) 573 574 #define NDDR_LOCK_SPIN(_nddr) \ 575 lck_mtx_lock_spin(&(_nddr)->nddr_lock) 576 577 #define NDDR_CONVERT_LOCK(_nddr) do { \ 578 NDPR_LOCK_ASSERT_HELD(_nddr); \ 579 lck_mtx_convert_spin(&(_nddr)->nddr_lock); \ 580 } while (0) 581 582 #define NDDR_UNLOCK(_nddr) \ 583 lck_mtx_unlock(&(_nddr)->nddr_lock) 584 585 #define NDDR_REF_LOCK(_nddr) \ 586 lck_mtx_lock(&(_nddr)->nddr_ref_lock) 587 588 #define NDDR_REF_LOCK_SPIN(_nddr) \ 589 lck_mtx_lock_spin(&(_nddr)->nddr_ref_lock) 590 591 #define NDDR_REF_UNLOCK(_nddr) \ 592 lck_mtx_unlock(&(_nddr)->nddr_ref_lock) 593 594 #define NDDR_ADDREF(_nddr) \ 595 nddr_addref(_nddr) 596 597 #define NDDR_REMREF(_nddr) \ 598 nddr_remref(_nddr) \ 599 600 TAILQ_HEAD(nd_rtihead, nd_route_info); 601 /* 602 * The ordering below is important and it should always start 603 * with nd_drhead as the first element. 604 * It gets passed in as the generic nd_drhead to router management code. 605 * The extra information stored here includes the prefix/prefix-length 606 * which the router list belongs to. 607 */ 608 struct nd_route_info { 609 struct nd_drhead nd_rti_router_list; 610 TAILQ_ENTRY(nd_route_info) nd_rti_entry; 611 struct in6_addr nd_rti_prefix; 612 u_int8_t nd_rti_prefixlen; 613 }; 614 615 struct nd_route_info *ndrti_alloc(void); 616 void nd6_rti_list_wait(const char *); 617 void nd6_rti_list_signal_done(void); 618 void ndrti_free(struct nd_route_info *rti); 619 void nd6_rtilist_remove(struct nd_route_info *); 620 void nd6_rtilist_update(struct nd_route_info *, struct nd_defrouter *); 621 int nd6_rtilist_add(struct nd_route_info *, struct nd_defrouter *, 622 struct nd_route_info **); 623 void nd6_rti_purge(struct nd_route_info *); 624 625 /* define struct prproxy_sols_tree */ 626 RB_HEAD(prproxy_sols_tree, nd6_prproxy_soltgt); 627 628 struct nd_prefix { 629 decl_lck_mtx_data(, ndpr_lock); 630 decl_lck_mtx_data(, ndpr_ref_lock); 631 u_int32_t ndpr_refcount; /* reference count */ 632 u_int32_t ndpr_debug; /* see ifa_debug flags */ 633 struct ifnet *ndpr_ifp; 634 struct rtentry *ndpr_rt; 635 LIST_ENTRY(nd_prefix) ndpr_entry; 636 struct sockaddr_in6 ndpr_prefix; /* prefix */ 637 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 638 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 639 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 640 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 641 u_int64_t ndpr_preferred; /* preferred time of the prefix */ 642 u_int64_t ndpr_expire; /* expiration time of the prefix */ 643 u_int64_t ndpr_lastupdate; /* rx time of last advertisement */ 644 u_int64_t ndpr_base_calendartime; /* calendar time at creation */ 645 u_int64_t ndpr_base_uptime; /* uptime at creation */ 646 struct prf_ra ndpr_flags; 647 unsigned int ndpr_genid; /* protects ndpr_advrtrs */ 648 u_int32_t ndpr_stateflags; /* actual state flags */ 649 /* list of routers that advertise the prefix: */ 650 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 651 u_char ndpr_plen; 652 int ndpr_addrcnt; /* reference counter from addresses */ 653 int ndpr_manual_addrcnt; /* reference counter non-autoconf addresses */ 654 u_int32_t ndpr_allmulti_cnt; /* total all-multi reqs */ 655 u_int32_t ndpr_prproxy_sols_cnt; /* total # of proxied NS */ 656 struct prproxy_sols_tree ndpr_prproxy_sols; /* tree of proxied NS */ 657 void (*ndpr_trace)(struct nd_prefix *, int); /* trace callback fn */ 658 }; 659 660 #define ndpr_next ndpr_entry.le_next 661 662 #define ndpr_raf ndpr_flags 663 #define ndpr_raf_onlink ndpr_flags.onlink 664 #define ndpr_raf_auto ndpr_flags.autonomous 665 #define ndpr_raf_router ndpr_flags.router 666 /* 667 * We keep expired prefix for certain amount of time, for validation purposes. 668 * 1800s = MaxRtrAdvInterval 669 */ 670 #define NDPR_KEEP_EXPIRED (1800 * 2) 671 672 #define NDPR_LOCK_ASSERT_HELD(_ndpr) \ 673 LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_OWNED) 674 675 #define NDPR_LOCK_ASSERT_NOTHELD(_ndpr) \ 676 LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_NOTOWNED) 677 678 #define NDPR_LOCK(_ndpr) \ 679 lck_mtx_lock(&(_ndpr)->ndpr_lock) 680 681 #define NDPR_LOCK_SPIN(_ndpr) \ 682 lck_mtx_lock_spin(&(_ndpr)->ndpr_lock) 683 684 #define NDPR_CONVERT_LOCK(_ndpr) do { \ 685 NDPR_LOCK_ASSERT_HELD(_ndpr); \ 686 lck_mtx_convert_spin(&(_ndpr)->ndpr_lock); \ 687 } while (0) 688 689 #define NDPR_UNLOCK(_ndpr) \ 690 lck_mtx_unlock(&(_ndpr)->ndpr_lock) 691 692 #define NDPR_REF_LOCK(_ndpr) \ 693 lck_mtx_lock(&(_ndpr)->ndpr_ref_lock) 694 695 #define NDPR_REF_LOCK_SPIN(_ndpr) \ 696 lck_mtx_lock_spin(&(_ndpr)->ndpr_ref_lock) 697 698 #define NDPR_REF_UNLOCK(_ndpr) \ 699 lck_mtx_unlock(&(_ndpr)->ndpr_ref_lock) 700 701 #define NDPR_ADDREF(_ndpr) \ 702 ndpr_addref(_ndpr) 703 704 #define NDPR_REMREF(_ndpr) \ 705 ndpr_remref(_ndpr) \ 706 707 /* 708 * Message format for use in obtaining information about prefixes 709 * from inet6 sysctl function 710 */ 711 struct inet6_ndpr_msghdr { 712 u_short inpm_msglen; /* to skip over non-understood messages */ 713 u_char inpm_version; /* future binary compatibility */ 714 u_char inpm_type; /* message type */ 715 struct in6_addr inpm_prefix; 716 u_int32_t prm_vltim; 717 u_int32_t prm_pltime; 718 u_int32_t prm_expire; 719 u_int32_t prm_preferred; 720 struct in6_prflags prm_flags; 721 u_short prm_index; /* index for associated ifp */ 722 u_char prm_plen; /* length of prefix in bits */ 723 }; 724 725 #define prm_raf_onlink prm_flags.prf_ra.onlink 726 #define prm_raf_auto prm_flags.prf_ra.autonomous 727 728 #define prm_statef_onlink prm_flags.prf_state.onlink 729 730 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 731 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 732 733 struct nd_pfxrouter { 734 LIST_ENTRY(nd_pfxrouter) pfr_entry; 735 #define pfr_next pfr_entry.le_next 736 struct nd_defrouter *router; 737 }; 738 739 LIST_HEAD(nd_prhead, nd_prefix); 740 741 struct nd_prefix_list { 742 struct nd_prefix_list *next; 743 struct nd_prefix pr; 744 }; 745 #endif /* BSD_KERNEL_PRIVATE */ 746 747 #if defined(PRIVATE) 748 struct kev_nd6_ndfailure { 749 struct net_event_data link_data; 750 }; 751 752 struct kev_nd6_ndalive { 753 struct net_event_data link_data; 754 }; 755 756 struct nd6_ra_prefix { 757 struct sockaddr_in6 prefix; 758 struct prf_ra raflags; 759 u_int32_t prefixlen; 760 u_int32_t origin; 761 u_int64_t vltime; 762 u_int64_t pltime; 763 u_int64_t expire; 764 u_int32_t flags; 765 u_int32_t refcnt; 766 u_int32_t if_index; 767 u_int32_t pad; 768 }; 769 770 /* ND6 router advertisement valid bits */ 771 #define KEV_ND6_DATA_VALID_MTU (0x1 << 0) 772 #define KEV_ND6_DATA_VALID_PREFIX (0x1 << 1) 773 774 struct kev_nd6_ra_data { 775 u_int32_t mtu; 776 u_int32_t list_index; 777 u_int32_t list_length; 778 u_int32_t flags; 779 struct nd6_ra_prefix prefix; 780 u_int32_t pad; 781 }; 782 783 struct kev_nd6_event { 784 struct net_event_data link_data; 785 struct in6_addr in6_address; 786 uint32_t val; 787 }; 788 789 struct nd6_lookup_ipv6_args { 790 char ifname[IFNAMSIZ]; 791 struct sockaddr_in6 ip6_dest; 792 u_int32_t ll_dest_len; 793 union { 794 char buffer[256]; 795 struct sockaddr_dl _sdl; 796 } ll_dest_; 797 }; 798 #define ll_dest_sdl ll_dest_._sdl 799 800 #endif /* PRIVATE */ 801 802 #if defined(BSD_KERNEL_PRIVATE) 803 /* nd6.c */ 804 extern int nd6_prune; 805 extern int nd6_prune_lazy; 806 extern int nd6_delay; 807 extern int nd6_umaxtries; 808 extern int nd6_mmaxtries; 809 extern int nd6_useloopback; 810 extern int nd6_accept_6to4; 811 extern int nd6_maxnudhint; 812 extern int nd6_gctimer; 813 extern struct llinfo_nd6 llinfo_nd6; 814 extern struct nd_drhead nd_defrouter_list; 815 extern struct nd_rtihead nd_rti_list; 816 extern struct nd_prhead nd_prefix; 817 extern int nd6_debug; 818 extern int nd6_onlink_ns_rfc4861; 819 extern int nd6_optimistic_dad; 820 821 #include <os/log.h> 822 823 #define nd6log0(type, ...) do { os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0) 824 #define nd6log(type, ...) do { if (nd6_debug >= 1) os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0) 825 #define nd6log2(type, ...) do { if (nd6_debug >= 2) os_log_##type(OS_LOG_DEFAULT, __VA_ARGS__); } while (0) 826 827 #define ND6_OPTIMISTIC_DAD_LINKLOCAL (1 << 0) 828 #define ND6_OPTIMISTIC_DAD_AUTOCONF (1 << 1) 829 #define ND6_OPTIMISTIC_DAD_TEMPORARY (1 << 2) 830 #define ND6_OPTIMISTIC_DAD_DYNAMIC (1 << 3) 831 #define ND6_OPTIMISTIC_DAD_SECURED (1 << 4) 832 #define ND6_OPTIMISTIC_DAD_MANUAL (1 << 5) 833 834 #define ND6_OPTIMISTIC_DAD_DEFAULT \ 835 (ND6_OPTIMISTIC_DAD_LINKLOCAL | ND6_OPTIMISTIC_DAD_AUTOCONF | \ 836 ND6_OPTIMISTIC_DAD_TEMPORARY | ND6_OPTIMISTIC_DAD_DYNAMIC | \ 837 ND6_OPTIMISTIC_DAD_SECURED | ND6_OPTIMISTIC_DAD_MANUAL) 838 839 /* nd6_rtr.c */ 840 extern int nd6_defifindex; 841 extern int ip6_desync_factor; /* seconds */ 842 /* ND6_INFINITE_LIFETIME does not apply to temporary addresses */ 843 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 844 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 845 extern int ip6_temp_regen_advance; /* seconds */ 846 847 union nd_opts { 848 struct nd_opt_hdr *nd_opt_array[26]; /* max = Route information option */ 849 struct { 850 struct nd_opt_hdr *zero; 851 struct nd_opt_hdr *src_lladdr; 852 struct nd_opt_hdr *tgt_lladdr; 853 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 854 struct nd_opt_rd_hdr *rh; 855 struct nd_opt_mtu *mtu; 856 struct nd_opt_hdr *__res6; 857 struct nd_opt_hdr *__res7; 858 struct nd_opt_hdr *__res8; 859 struct nd_opt_hdr *__res9; 860 struct nd_opt_hdr *__res10; 861 struct nd_opt_hdr *__res11; 862 struct nd_opt_hdr *__res12; 863 struct nd_opt_hdr *__res13; 864 struct nd_opt_nonce *nonce; 865 struct nd_opt_hdr *__res15; 866 struct nd_opt_hdr *__res16; 867 struct nd_opt_hdr *__res17; 868 struct nd_opt_hdr *__res18; 869 struct nd_opt_hdr *__res19; 870 struct nd_opt_hdr *__res20; 871 struct nd_opt_hdr *__res21; 872 struct nd_opt_hdr *__res22; 873 struct nd_opt_hdr *__res23; 874 struct nd_opt_route_info *rti_beg; 875 struct nd_opt_hdr *__res25; 876 struct nd_opt_hdr *search; /* multiple opts */ 877 struct nd_opt_hdr *last; /* multiple opts */ 878 int done; 879 struct nd_opt_prefix_info *pi_end; /* multiple prefix opts, end */ 880 struct nd_opt_route_info *rti_end; /* multiple route info opts, end */ 881 } nd_opt_each; 882 }; 883 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 884 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 885 #define nd_opts_pi nd_opt_each.pi_beg 886 #define nd_opts_pi_end nd_opt_each.pi_end 887 #define nd_opts_rh nd_opt_each.rh 888 #define nd_opts_mtu nd_opt_each.mtu 889 #define nd_opts_nonce nd_opt_each.nonce 890 #define nd_opts_rti nd_opt_each.rti_beg 891 #define nd_opts_rti_end nd_opt_each.rti_end 892 #define nd_opts_search nd_opt_each.search 893 #define nd_opts_last nd_opt_each.last 894 #define nd_opts_done nd_opt_each.done 895 896 /* XXX: need nd6_var.h?? */ 897 /* nd6.c */ 898 extern int nd6_sched_timeout_want; 899 extern void nd6_sched_timeout(struct timeval *, struct timeval *); 900 extern void nd6_init(void); 901 extern void nd6_ifreset(struct ifnet *ifp); 902 extern void nd6_ifattach(struct ifnet *); 903 extern int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *, int); 904 extern void nd6_option_init(void *, int, union nd_opts *); 905 extern struct nd_opt_hdr *nd6_option(union nd_opts *); 906 extern int nd6_options(union nd_opts *); 907 extern struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, int); 908 extern void nd6_setmtu(struct ifnet *); 909 extern void nd6_purge(struct ifnet *); 910 extern void nd6_free(struct rtentry *); 911 extern void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 912 extern int nd6_resolve(struct ifnet *, struct rtentry *, 913 struct mbuf *, struct sockaddr *, u_char *); 914 extern void nd6_rtrequest(int, struct rtentry *, struct sockaddr *); 915 extern int nd6_ioctl(u_long, caddr_t, struct ifnet *); 916 extern void nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 917 char *, int, int, int, int *); 918 extern int nd6_output_list(struct ifnet *, struct ifnet *, struct mbuf *, 919 struct sockaddr_in6 *, struct rtentry *, struct flowadv *); 920 extern int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 921 struct sockaddr_in6 *, struct rtentry *, struct flowadv *); 922 extern int nd6_storelladdr(struct ifnet *, struct rtentry *, struct mbuf *, 923 struct sockaddr *, u_char *); 924 extern int nd6_need_cache(struct ifnet *); 925 extern void nd6_drain(void *); 926 extern void nd6_post_msg(u_int32_t, struct nd_prefix_list *, u_int32_t, 927 u_int32_t); 928 extern int nd6_setifinfo(struct ifnet *, u_int32_t, u_int32_t); 929 extern const char *ndcache_state2str(short); 930 extern void ln_setexpire(struct llinfo_nd6 *, uint64_t); 931 932 /* nd6_nbr.c */ 933 extern void nd6_nbr_init(void); 934 extern void nd6_na_input(struct mbuf *, int, int); 935 extern void nd6_na_output(struct ifnet *, const struct in6_addr *, 936 const struct in6_addr *, u_int32_t, int, struct sockaddr *); 937 extern void nd6_ns_input(struct mbuf *, int, int); 938 extern void nd6_ns_output(struct ifnet *, const struct in6_addr *, 939 const struct in6_addr *, struct llinfo_nd6 *, uint8_t *); 940 extern caddr_t nd6_ifptomac(struct ifnet *); 941 extern void nd6_dad_start(struct ifaddr *, int *); 942 extern void nd6_dad_stop(struct ifaddr *); 943 extern void nd6_llreach_alloc(struct rtentry *, struct ifnet *, void *, 944 unsigned int, boolean_t); 945 extern void nd6_llreach_set_reachable(struct ifnet *, void *, unsigned int); 946 extern void nd6_llreach_use(struct llinfo_nd6 *); 947 extern void nd6_alt_node_addr_decompose(struct ifnet *, struct sockaddr *, 948 struct sockaddr_dl *, struct sockaddr_in6 *); 949 extern int nd6_alt_node_present(struct ifnet *, struct sockaddr_in6 *, 950 struct sockaddr_dl *, int32_t, int, int); 951 extern int nd6_alt_node_absent(struct ifnet *, struct sockaddr_in6 *, struct sockaddr_dl *); 952 953 /* nd6_rtr.c */ 954 extern struct in6_ifaddr *in6_pfx_newpersistaddr(struct nd_prefix *, int, 955 int *, boolean_t, uint8_t); 956 extern void nd6_rtr_init(void); 957 extern void nd6_rs_input(struct mbuf *, int, int); 958 extern void nd6_ra_input(struct mbuf *, int, int); 959 extern void prelist_del(struct nd_prefix *); 960 extern struct nd_defrouter *defrtrlist_update(struct nd_defrouter *, 961 struct nd_drhead *); 962 extern void defrouter_select(struct ifnet *, struct nd_drhead *); 963 extern void defrouter_reset(void); 964 extern int defrtrlist_ioctl(u_long, caddr_t); 965 extern void defrtrlist_del(struct nd_defrouter *, struct nd_drhead *); 966 extern int defrtrlist_add_static(struct nd_defrouter *); 967 extern int defrtrlist_del_static(struct nd_defrouter *); 968 extern void prelist_remove(struct nd_prefix *); 969 extern int prelist_update(struct nd_prefix *, struct nd_defrouter *, 970 struct mbuf *, int); 971 extern int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *, 972 struct nd_prefix **, boolean_t); 973 extern int nd6_prefix_onlink(struct nd_prefix *); 974 extern int nd6_prefix_onlink_scoped(struct nd_prefix *, unsigned int); 975 extern int nd6_prefix_offlink(struct nd_prefix *); 976 extern void pfxlist_onlink_check(void); 977 extern void defrouter_set_reachability(struct in6_addr *, struct ifnet *, boolean_t); 978 extern struct nd_defrouter *defrouter_lookup(struct nd_drhead *, 979 struct in6_addr *, struct ifnet *); 980 extern struct nd_pfxrouter *pfxrtr_lookup(struct nd_prefix *, struct nd_defrouter *); 981 extern struct nd_prefix *nd6_prefix_lookup(struct nd_prefix *, int); 982 extern int in6_init_prefix_ltimes(struct nd_prefix *ndpr); 983 extern void rt6_flush(struct in6_addr *, struct ifnet *); 984 extern int nd6_setdefaultiface(int); 985 extern int in6_tmpifadd(const struct in6_ifaddr *, int); 986 extern void nddr_addref(struct nd_defrouter *); 987 extern struct nd_defrouter *nddr_remref(struct nd_defrouter *); 988 extern uint64_t nddr_getexpire(struct nd_defrouter *); 989 extern void ndpr_addref(struct nd_prefix *); 990 extern struct nd_prefix *ndpr_remref(struct nd_prefix *); 991 extern uint64_t ndpr_getexpire(struct nd_prefix *); 992 993 /* nd6_prproxy.c */ 994 struct ip6_hdr; 995 extern u_int32_t nd6_prproxy; 996 extern int nd6_if_prproxy(struct ifnet *, boolean_t); 997 extern void nd6_prproxy_prelist_update(struct nd_prefix *, struct nd_prefix *); 998 extern boolean_t nd6_prproxy_ifaddr(struct in6_ifaddr *); 999 extern void nd6_proxy_find_fwdroute(struct ifnet *, struct route_in6 *); 1000 extern boolean_t nd6_prproxy_isours(struct mbuf *, struct ip6_hdr *, 1001 struct route_in6 *, unsigned int); 1002 extern void nd6_prproxy_ns_output(struct ifnet *, struct ifnet *, 1003 struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *); 1004 extern void nd6_prproxy_ns_input(struct ifnet *, struct in6_addr *, 1005 char *, int, struct in6_addr *, struct in6_addr *, uint8_t *nonce); 1006 extern void nd6_prproxy_na_input(struct ifnet *, struct in6_addr *, 1007 struct in6_addr *, struct in6_addr *, int); 1008 extern void nd6_prproxy_sols_reap(struct nd_prefix *); 1009 extern void nd6_prproxy_sols_prune(struct nd_prefix *, u_int32_t); 1010 extern int nd6_if_disable(struct ifnet *, boolean_t); 1011 void in6_ifaddr_set_dadprogress(struct in6_ifaddr *ia); 1012 #endif /* BSD_KERNEL_PRIVATE */ 1013 1014 #ifdef KERNEL 1015 1016 /* 1017 * @function nd6_lookup_ipv6 1018 * @discussion This function will check the routing table for a cached 1019 * neighbor discovery entry or trigger an neighbor discovery query 1020 * to resolve the IPv6 address to a link-layer address. 1021 * nd entries are stored in the routing table. This function will 1022 * lookup the IPv6 destination in the routing table. If the 1023 * destination requires forwarding to a gateway, the route of the 1024 * gateway will be looked up. The route entry is inspected to 1025 * determine if the link layer destination address is known. If 1026 * unknown, neighbor discovery will be used to resolve the entry. 1027 * @param interface The interface the packet is being sent on. 1028 * @param ip6_dest The IPv6 destination of the packet. 1029 * @param ll_dest On output, the link-layer destination. 1030 * @param ll_dest_len The length of the buffer for ll_dest. 1031 * @param hint Any routing hint passed down from the protocol. 1032 * @param packet The packet being transmitted. 1033 * @result May return an error such as EHOSTDOWN or ENETUNREACH. If 1034 * this function returns EJUSTRETURN, the packet has been queued 1035 * and will be sent when the address is resolved. If any other 1036 * value is returned, the caller is responsible for disposing of 1037 * the packet. 1038 */ 1039 extern errno_t nd6_lookup_ipv6(ifnet_t interface, 1040 const struct sockaddr_in6 *ip6_dest, struct sockaddr_dl *ll_dest, 1041 size_t ll_dest_len, route_t hint, mbuf_t packet); 1042 1043 #endif /* KERNEL */ 1044 1045 /* nd6_send.c */ 1046 #ifdef BSD_KERNEL_PRIVATE 1047 /* 1048 * nd6_send_opmode 1049 * 1050 * value using CGA tx SEND rx SEND 1051 * -------- --------- ------- ------- 1052 * DISABLED NO NO NO 1053 * QUIET YES NO NO 1054 */ 1055 extern int nd6_send_opstate; 1056 1057 #define ND6_SEND_OPMODE_DISABLED 0 1058 #define ND6_SEND_OPMODE_CGA_QUIET 1 1059 1060 #endif /* BSD_KERNEL_PRIVATE */ 1061 #endif /* _NETINET6_ND6_H_ */ 1062