1 | /* |
2 | * Copyright (c) 2000-2017 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 | struct rtentry *ln_rt = (ln)->ln_rt; \ |
122 | if (nd6_debug >= 1) {\ |
123 | nd6log((LOG_INFO,\ |
124 | "[%s:%d]: NDP cache entry changed from %s -> %s",\ |
125 | __func__,\ |
126 | __LINE__,\ |
127 | ndcache_state2str((ln)->ln_state),\ |
128 | ndcache_state2str(nstate)));\ |
129 | if (ln_rt != NULL)\ |
130 | nd6log((LOG_INFO,\ |
131 | " for address: %s.\n",\ |
132 | ip6_sprintf(&SIN6(rt_key(ln_rt))->sin6_addr)));\ |
133 | else\ |
134 | nd6log((LOG_INFO, "\n"));\ |
135 | }\ |
136 | (ln)->ln_state = nstate;\ |
137 | } while(0) |
138 | |
139 | #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) |
140 | #define ND6_LLINFO_PERMANENT(n) \ |
141 | (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) |
142 | |
143 | #define ND6_EUI64_GBIT 0x01 |
144 | #define ND6_EUI64_UBIT 0x02 |
145 | |
146 | #define ND6_EUI64_TO_IFID(in6) \ |
147 | do {(in6)->s6_addr[8] ^= ND6_EUI64_UBIT; } while (0) |
148 | |
149 | #define ND6_EUI64_GROUP(in6) ((in6)->s6_addr[8] & ND6_EUI64_GBIT) |
150 | #define ND6_EUI64_INDIVIDUAL(in6) (!ND6_EUI64_GROUP(in6)) |
151 | #define ND6_EUI64_LOCAL(in6) ((in6)->s6_addr[8] & ND6_EUI64_UBIT) |
152 | #define ND6_EUI64_UNIVERSAL(in6) (!ND6_EUI64_LOCAL(in6)) |
153 | #define ND6_IFID_LOCAL(in6) (!ND6_EUI64_LOCAL(in6)) |
154 | #define ND6_IFID_UNIVERSAL(in6) (!ND6_EUI64_UNIVERSAL(in6)) |
155 | #endif /* BSD_KERNEL_PRIVATE */ |
156 | |
157 | #if !defined(BSD_KERNEL_PRIVATE) |
158 | struct nd_ifinfo { |
159 | #else |
160 | /* For binary compatibility, this structure must not change */ |
161 | /* NOTE: nd_ifinfo is defined in nd6_var.h */ |
162 | struct nd_ifinfo_compat { |
163 | #endif /* !BSD_KERNEL_PRIVATE */ |
164 | u_int32_t linkmtu; /* LinkMTU */ |
165 | u_int32_t maxmtu; /* Upper bound of LinkMTU */ |
166 | u_int32_t basereachable; /* BaseReachableTime */ |
167 | u_int32_t reachable; /* Reachable Time */ |
168 | u_int32_t retrans; /* Retrans Timer */ |
169 | u_int32_t flags; /* Flags */ |
170 | int recalctm; /* BaseReacable re-calculation timer */ |
171 | u_int8_t chlim; /* CurHopLimit */ |
172 | u_int8_t receivedra; |
173 | /* the following 3 members are for privacy extension for addrconf */ |
174 | u_int8_t randomseed0[8]; /* upper 64 bits of SHA1 digest */ |
175 | u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ |
176 | u_int8_t randomid[8]; /* current random ID */ |
177 | }; |
178 | |
179 | #define ND6_IFF_PERFORMNUD 0x1 |
180 | #if defined(PRIVATE) |
181 | |
182 | /* |
183 | * APPLE: not used. Interface specific router advertisements are handled with a |
184 | * specific ifnet flag: IFEF_ACCEPT_RTADVD |
185 | */ |
186 | #define ND6_IFF_ACCEPT_RTADV 0x2 |
187 | |
188 | /* APPLE: NOT USED not related to ND. */ |
189 | #define ND6_IFF_PREFER_SOURCE 0x4 |
190 | |
191 | /* IPv6 operation is disabled due to * DAD failure. (XXX: not ND-specific) */ |
192 | #define ND6_IFF_IFDISABLED 0x8 |
193 | |
194 | #define ND6_IFF_DONT_SET_IFROUTE 0x10 /* NOT USED */ |
195 | #endif /* PRIVATE */ |
196 | #define ND6_IFF_PROXY_PREFIXES 0x20 |
197 | #define ND6_IFF_IGNORE_NA 0x40 |
198 | #if defined(PRIVATE) |
199 | #define ND6_IFF_INSECURE 0x80 |
200 | #endif |
201 | #define ND6_IFF_REPLICATED 0x100 /* sleep proxy registered */ |
202 | #define ND6_IFF_DAD 0x200 /* Perform DAD on the interface */ |
203 | |
204 | struct in6_nbrinfo { |
205 | char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ |
206 | struct in6_addr addr; /* IPv6 address of the neighbor */ |
207 | long asked; /* # of queries already sent for this addr */ |
208 | int isrouter; /* if it acts as a router */ |
209 | int state; /* reachability state */ |
210 | int expire; /* lifetime for NDP state transition */ |
211 | }; |
212 | |
213 | #if defined(BSD_KERNEL_PRIVATE) |
214 | struct in6_nbrinfo_32 { |
215 | char ifname[IFNAMSIZ]; |
216 | struct in6_addr addr; |
217 | u_int32_t asked; |
218 | int isrouter; |
219 | int state; |
220 | int expire; |
221 | }; |
222 | |
223 | struct in6_nbrinfo_64 { |
224 | char ifname[IFNAMSIZ]; |
225 | struct in6_addr addr; |
226 | long asked; |
227 | int isrouter __attribute__((aligned(8))); |
228 | int state; |
229 | int expire; |
230 | } __attribute__((aligned(8))); |
231 | #endif /* BSD_KERNEL_PRIVATE */ |
232 | |
233 | #define DRLSTSIZ 10 |
234 | #define PRLSTSIZ 10 |
235 | |
236 | struct in6_drlist { |
237 | char ifname[IFNAMSIZ]; |
238 | struct { |
239 | struct in6_addr rtaddr; |
240 | u_char flags; |
241 | u_short rtlifetime; |
242 | u_long expire; |
243 | u_short if_index; |
244 | } defrouter[DRLSTSIZ]; |
245 | }; |
246 | |
247 | #if defined(BSD_KERNEL_PRIVATE) |
248 | struct in6_drlist_32 { |
249 | char ifname[IFNAMSIZ]; |
250 | struct { |
251 | struct in6_addr rtaddr; |
252 | u_char flags; |
253 | u_short rtlifetime; |
254 | u_int32_t expire; |
255 | u_short if_index; |
256 | } defrouter[DRLSTSIZ]; |
257 | }; |
258 | |
259 | struct in6_drlist_64 { |
260 | char ifname[IFNAMSIZ]; |
261 | struct { |
262 | struct in6_addr rtaddr; |
263 | u_char flags; |
264 | u_short rtlifetime; |
265 | u_long expire __attribute__((aligned(8))); |
266 | u_short if_index __attribute__((aligned(8))); |
267 | } defrouter[DRLSTSIZ] __attribute__((aligned(8))); |
268 | }; |
269 | #endif /* BSD_KERNEL_PRIVATE */ |
270 | |
271 | /* valid values for stateflags */ |
272 | #define NDDRF_INSTALLED 0x1 /* installed in the routing table */ |
273 | #define NDDRF_IFSCOPE 0x2 /* installed as a scoped route */ |
274 | #define NDDRF_STATIC 0x4 /* for internal use only */ |
275 | #define NDDRF_MAPPED 0x8 /* Default router addr is mapped to a different one for routing */ |
276 | |
277 | struct in6_defrouter { |
278 | struct sockaddr_in6 rtaddr; |
279 | u_char flags; |
280 | u_char stateflags; |
281 | u_short rtlifetime; |
282 | u_long expire; |
283 | u_short if_index; |
284 | }; |
285 | |
286 | #if defined(BSD_KERNEL_PRIVATE) |
287 | struct in6_defrouter_32 { |
288 | struct sockaddr_in6 rtaddr; |
289 | u_char flags; |
290 | u_char stateflags; |
291 | u_short rtlifetime; |
292 | u_int32_t expire; |
293 | u_short if_index; |
294 | }; |
295 | |
296 | struct in6_defrouter_64 { |
297 | struct sockaddr_in6 rtaddr; |
298 | u_char flags; |
299 | u_char stateflags; |
300 | u_short rtlifetime; |
301 | u_long expire __attribute__((aligned(8))); |
302 | u_short if_index __attribute__((aligned(8))); |
303 | } __attribute__((aligned(8))); |
304 | #endif /* BSD_KERNEL_PRIVATE */ |
305 | |
306 | struct in6_prlist { |
307 | char ifname[IFNAMSIZ]; |
308 | struct { |
309 | struct in6_addr prefix; |
310 | struct prf_ra raflags; |
311 | u_char prefixlen; |
312 | u_char origin; |
313 | u_long vltime; |
314 | u_long pltime; |
315 | u_long expire; |
316 | u_short if_index; |
317 | u_short advrtrs; /* number of advertisement routers */ |
318 | struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ |
319 | } prefix[PRLSTSIZ]; |
320 | }; |
321 | |
322 | #if defined(BSD_KERNEL_PRIVATE) |
323 | struct in6_prlist_32 { |
324 | char ifname[IFNAMSIZ]; |
325 | struct { |
326 | struct in6_addr prefix; |
327 | struct prf_ra raflags; |
328 | u_char prefixlen; |
329 | u_char origin; |
330 | u_int32_t vltime; |
331 | u_int32_t pltime; |
332 | u_int32_t expire; |
333 | u_short if_index; |
334 | u_short advrtrs; |
335 | struct in6_addr advrtr[DRLSTSIZ]; |
336 | } prefix[PRLSTSIZ]; |
337 | }; |
338 | |
339 | struct in6_prlist_64 { |
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_long vltime __attribute__((aligned(8))); |
347 | u_long pltime __attribute__((aligned(8))); |
348 | u_long expire __attribute__((aligned(8))); |
349 | u_short if_index; |
350 | u_short advrtrs; |
351 | u_int32_t pad; |
352 | struct in6_addr advrtr[DRLSTSIZ]; |
353 | } prefix[PRLSTSIZ]; |
354 | }; |
355 | #endif /* BSD_KERNEL_PRIVATE */ |
356 | |
357 | struct in6_prefix { |
358 | struct sockaddr_in6 prefix; |
359 | struct prf_ra raflags; |
360 | u_char prefixlen; |
361 | u_char origin; |
362 | u_long vltime; |
363 | u_long pltime; |
364 | u_long expire; |
365 | u_int32_t flags; |
366 | int refcnt; |
367 | u_short if_index; |
368 | u_short advrtrs; /* number of advertisement routers */ |
369 | /* struct sockaddr_in6 advrtr[] */ |
370 | }; |
371 | |
372 | #if defined(BSD_KERNEL_PRIVATE) |
373 | struct in6_prefix_32 { |
374 | struct sockaddr_in6 prefix; |
375 | struct prf_ra raflags; |
376 | u_char prefixlen; |
377 | u_char origin; |
378 | u_int32_t vltime; |
379 | u_int32_t pltime; |
380 | u_int32_t 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 | struct in6_prefix_64 { |
389 | struct sockaddr_in6 prefix; |
390 | struct prf_ra raflags; |
391 | u_char prefixlen; |
392 | u_char origin; |
393 | u_long vltime __attribute__((aligned(8))); |
394 | u_long pltime __attribute__((aligned(8))); |
395 | u_long expire __attribute__((aligned(8))); |
396 | u_int32_t flags __attribute__((aligned(8))); |
397 | int refcnt; |
398 | u_short if_index; |
399 | u_short advrtrs; |
400 | /* struct sockaddr_in6 advrtr[] */ |
401 | }; |
402 | #endif /* BSD_KERNEL_PRIVATE */ |
403 | |
404 | struct in6_ondireq { |
405 | char ifname[IFNAMSIZ]; |
406 | struct { |
407 | u_int32_t linkmtu; /* LinkMTU */ |
408 | u_int32_t maxmtu; /* Upper bound of LinkMTU */ |
409 | u_int32_t basereachable; /* BaseReachableTime */ |
410 | u_int32_t reachable; /* Reachable Time */ |
411 | u_int32_t retrans; /* Retrans Timer */ |
412 | u_int32_t flags; /* Flags */ |
413 | int recalctm; /* BaseReacable re-calculation timer */ |
414 | u_int8_t chlim; /* CurHopLimit */ |
415 | u_int8_t receivedra; |
416 | } ndi; |
417 | }; |
418 | |
419 | #if !defined(BSD_KERNEL_PRIVATE) |
420 | struct in6_ndireq { |
421 | char ifname[IFNAMSIZ]; |
422 | struct nd_ifinfo ndi; |
423 | }; |
424 | #else |
425 | struct in6_ndireq { |
426 | char ifname[IFNAMSIZ]; |
427 | struct nd_ifinfo_compat ndi; |
428 | }; |
429 | #endif /* !BSD_KERNEL_PRIVATE */ |
430 | |
431 | struct in6_ndifreq { |
432 | char ifname[IFNAMSIZ]; |
433 | u_long ifindex; |
434 | }; |
435 | |
436 | #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ |
437 | #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ |
438 | |
439 | #if defined(BSD_KERNEL_PRIVATE) |
440 | struct in6_ndifreq_32 { |
441 | char ifname[IFNAMSIZ]; |
442 | u_int32_t ifindex; |
443 | }; |
444 | |
445 | struct in6_ndifreq_64 { |
446 | char ifname[IFNAMSIZ]; |
447 | u_long ifindex __attribute__((aligned(8))); |
448 | }; |
449 | #endif /* BSD_KERNEL_PRIVATE */ |
450 | |
451 | /* Prefix status */ |
452 | #define NDPRF_ONLINK 0x1 |
453 | #define NDPRF_DETACHED 0x2 |
454 | #define NDPRF_STATIC 0x100 |
455 | #define NDPRF_IFSCOPE 0x1000 |
456 | #define NDPRF_PRPROXY 0x2000 |
457 | #ifdef BSD_KERNEL_PRIVATE |
458 | #define NDPRF_PROCESSED_ONLINK 0x08000 |
459 | #define NDPRF_PROCESSED_SERVICE 0x10000 |
460 | #define NDPRF_DEFUNCT 0x20000 |
461 | #define NDPRF_CLAT46 0x40000 |
462 | #endif |
463 | |
464 | /* protocol constants */ |
465 | #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ |
466 | #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ |
467 | #define MAX_RTR_SOLICITATIONS 3 |
468 | |
469 | #define ND6_INFINITE_LIFETIME 0xffffffff |
470 | #define ND6_MAX_LIFETIME 0x7fffffff |
471 | |
472 | #ifdef BSD_KERNEL_PRIVATE |
473 | #define ND_IFINFO(ifp) \ |
474 | ((ifp == NULL) ? NULL : \ |
475 | ((IN6_IFEXTRA(ifp) == NULL) ? NULL : \ |
476 | (&IN6_IFEXTRA(ifp)->nd_ifinfo))) |
477 | |
478 | /* |
479 | * In a more readable form, we derive linkmtu based on: |
480 | * |
481 | * if (ifp == NULL) |
482 | * linkmtu = IPV6_MMTU |
483 | * else if (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized) |
484 | * linkmtu = ifp->if_mtu; |
485 | * else if (ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < ifp->if_mtu) |
486 | * linkmtu = ND_IFINFO(ifp)->linkmtu; |
487 | * else if ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < ifp->if_mtu)) |
488 | * linkmtu = ND_IFINFO(ifp)->maxmtu; |
489 | * else |
490 | * linkmtu = ifp->if_mtu; |
491 | */ |
492 | #define IN6_LINKMTU(ifp) \ |
493 | (ifp == NULL ? IPV6_MMTU : \ |
494 | (ND_IFINFO(ifp) == NULL || !ND_IFINFO(ifp)->initialized) ? \ |
495 | (ifp)->if_mtu : ((ND_IFINFO(ifp)->linkmtu && \ |
496 | ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) ? ND_IFINFO(ifp)->linkmtu : \ |
497 | ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) ? \ |
498 | ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))) |
499 | |
500 | /* node constants */ |
501 | #define MAX_REACHABLE_TIME 3600000 /* msec */ |
502 | #define REACHABLE_TIME 30000 /* msec */ |
503 | #define RETRANS_TIMER 1000 /* msec */ |
504 | #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ |
505 | #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ |
506 | #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ |
507 | #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ |
508 | #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ |
509 | #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ |
510 | #define ND_COMPUTE_RTIME(x) \ |
511 | (((MIN_RANDOM_FACTOR * (x >> 10)) + (RandomULong() & \ |
512 | ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) |
513 | |
514 | /* prefix expiry times */ |
515 | #define ND6_PREFIX_EXPIRY_UNSPEC -1 |
516 | #define ND6_PREFIX_EXPIRY_NEVER 0 |
517 | |
518 | TAILQ_HEAD(nd_drhead, nd_defrouter); |
519 | struct nd_defrouter { |
520 | decl_lck_mtx_data(, nddr_lock); |
521 | TAILQ_ENTRY(nd_defrouter) dr_entry; |
522 | struct in6_addr rtaddr; |
523 | u_int32_t nddr_refcount; |
524 | u_int32_t nddr_debug; |
525 | u_int64_t expire; |
526 | u_int64_t base_calendartime; /* calendar time at creation */ |
527 | u_int64_t base_uptime; /* uptime at creation */ |
528 | u_char flags; /* flags on RA message */ |
529 | u_char stateflags; |
530 | u_short rtlifetime; |
531 | int err; |
532 | struct ifnet *ifp; |
533 | struct in6_addr rtaddr_mapped; /* Mapped gateway address for routing */ |
534 | void (*nddr_trace)(struct nd_defrouter *, int); /* trace callback fn */ |
535 | }; |
536 | |
537 | #define NDDR_LOCK_ASSERT_HELD(_nddr) \ |
538 | LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_OWNED) |
539 | |
540 | #define NDDR_LOCK_ASSERT_NOTHELD(_nddr) \ |
541 | LCK_MTX_ASSERT(&(_nddr)->nddr_lock, LCK_MTX_ASSERT_NOTOWNED) |
542 | |
543 | #define NDDR_LOCK(_nddr) \ |
544 | lck_mtx_lock(&(_nddr)->nddr_lock) |
545 | |
546 | #define NDDR_LOCK_SPIN(_nddr) \ |
547 | lck_mtx_lock_spin(&(_nddr)->nddr_lock) |
548 | |
549 | #define NDDR_CONVERT_LOCK(_nddr) do { \ |
550 | NDPR_LOCK_ASSERT_HELD(_nddr); \ |
551 | lck_mtx_convert_spin(&(_nddr)->nddr_lock); \ |
552 | } while (0) |
553 | |
554 | #define NDDR_UNLOCK(_nddr) \ |
555 | lck_mtx_unlock(&(_nddr)->nddr_lock) |
556 | |
557 | #define NDDR_ADDREF(_nddr) \ |
558 | nddr_addref(_nddr, 0) |
559 | |
560 | #define NDDR_ADDREF_LOCKED(_nddr) \ |
561 | nddr_addref(_nddr, 1) |
562 | |
563 | #define NDDR_REMREF(_nddr) do { \ |
564 | (void) nddr_remref(_nddr, 0); \ |
565 | } while (0) |
566 | |
567 | #define NDDR_REMREF_LOCKED(_nddr) \ |
568 | nddr_remref(_nddr, 1) |
569 | |
570 | /* define struct prproxy_sols_tree */ |
571 | RB_HEAD(prproxy_sols_tree, nd6_prproxy_soltgt); |
572 | |
573 | struct nd_prefix { |
574 | decl_lck_mtx_data(, ndpr_lock); |
575 | u_int32_t ndpr_refcount; /* reference count */ |
576 | u_int32_t ndpr_debug; /* see ifa_debug flags */ |
577 | struct ifnet *ndpr_ifp; |
578 | struct rtentry *ndpr_rt; |
579 | LIST_ENTRY(nd_prefix) ndpr_entry; |
580 | struct sockaddr_in6 ndpr_prefix; /* prefix */ |
581 | struct in6_addr ndpr_mask; /* netmask derived from the prefix */ |
582 | struct in6_addr ndpr_addr; /* address that is derived from the prefix */ |
583 | u_int32_t ndpr_vltime; /* advertised valid lifetime */ |
584 | u_int32_t ndpr_pltime; /* advertised preferred lifetime */ |
585 | u_int64_t ndpr_preferred; /* preferred time of the prefix */ |
586 | u_int64_t ndpr_expire; /* expiration time of the prefix */ |
587 | u_int64_t ndpr_lastupdate; /* rx time of last advertisement */ |
588 | u_int64_t ndpr_base_calendartime; /* calendar time at creation */ |
589 | u_int64_t ndpr_base_uptime; /* uptime at creation */ |
590 | struct prf_ra ndpr_flags; |
591 | unsigned int ndpr_genid; /* protects ndpr_advrtrs */ |
592 | u_int32_t ndpr_stateflags; /* actual state flags */ |
593 | /* list of routers that advertise the prefix: */ |
594 | LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; |
595 | u_char ndpr_plen; |
596 | int ndpr_addrcnt; /* reference counter from addresses */ |
597 | u_int32_t ndpr_allmulti_cnt; /* total all-multi reqs */ |
598 | u_int32_t ndpr_prproxy_sols_cnt; /* total # of proxied NS */ |
599 | struct prproxy_sols_tree ndpr_prproxy_sols; /* tree of proxied NS */ |
600 | void (*ndpr_trace)(struct nd_prefix *, int); /* trace callback fn */ |
601 | }; |
602 | |
603 | #define ndpr_next ndpr_entry.le_next |
604 | |
605 | #define ndpr_raf ndpr_flags |
606 | #define ndpr_raf_onlink ndpr_flags.onlink |
607 | #define ndpr_raf_auto ndpr_flags.autonomous |
608 | #define ndpr_raf_router ndpr_flags.router |
609 | /* |
610 | * We keep expired prefix for certain amount of time, for validation purposes. |
611 | * 1800s = MaxRtrAdvInterval |
612 | */ |
613 | #define NDPR_KEEP_EXPIRED (1800 * 2) |
614 | |
615 | #define NDPR_LOCK_ASSERT_HELD(_ndpr) \ |
616 | LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_OWNED) |
617 | |
618 | #define NDPR_LOCK_ASSERT_NOTHELD(_ndpr) \ |
619 | LCK_MTX_ASSERT(&(_ndpr)->ndpr_lock, LCK_MTX_ASSERT_NOTOWNED) |
620 | |
621 | #define NDPR_LOCK(_ndpr) \ |
622 | lck_mtx_lock(&(_ndpr)->ndpr_lock) |
623 | |
624 | #define NDPR_LOCK_SPIN(_ndpr) \ |
625 | lck_mtx_lock_spin(&(_ndpr)->ndpr_lock) |
626 | |
627 | #define NDPR_CONVERT_LOCK(_ndpr) do { \ |
628 | NDPR_LOCK_ASSERT_HELD(_ndpr); \ |
629 | lck_mtx_convert_spin(&(_ndpr)->ndpr_lock); \ |
630 | } while (0) |
631 | |
632 | #define NDPR_UNLOCK(_ndpr) \ |
633 | lck_mtx_unlock(&(_ndpr)->ndpr_lock) |
634 | |
635 | #define NDPR_ADDREF(_ndpr) \ |
636 | ndpr_addref(_ndpr, 0) |
637 | |
638 | #define NDPR_ADDREF_LOCKED(_ndpr) \ |
639 | ndpr_addref(_ndpr, 1) |
640 | |
641 | #define NDPR_REMREF(_ndpr) do { \ |
642 | (void) ndpr_remref(_ndpr, 0); \ |
643 | } while (0) |
644 | |
645 | #define NDPR_REMREF_LOCKED(_ndpr) \ |
646 | ndpr_remref(_ndpr, 1) |
647 | |
648 | /* |
649 | * Message format for use in obtaining information about prefixes |
650 | * from inet6 sysctl function |
651 | */ |
652 | struct inet6_ndpr_msghdr { |
653 | u_short inpm_msglen; /* to skip over non-understood messages */ |
654 | u_char inpm_version; /* future binary compatibility */ |
655 | u_char inpm_type; /* message type */ |
656 | struct in6_addr inpm_prefix; |
657 | u_int32_t prm_vltim; |
658 | u_int32_t prm_pltime; |
659 | u_int32_t prm_expire; |
660 | u_int32_t prm_preferred; |
661 | struct in6_prflags prm_flags; |
662 | u_short prm_index; /* index for associated ifp */ |
663 | u_char prm_plen; /* length of prefix in bits */ |
664 | }; |
665 | |
666 | #define prm_raf_onlink prm_flags.prf_ra.onlink |
667 | #define prm_raf_auto prm_flags.prf_ra.autonomous |
668 | |
669 | #define prm_statef_onlink prm_flags.prf_state.onlink |
670 | |
671 | #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid |
672 | #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd |
673 | |
674 | struct nd_pfxrouter { |
675 | LIST_ENTRY(nd_pfxrouter) pfr_entry; |
676 | #define pfr_next pfr_entry.le_next |
677 | struct nd_defrouter *router; |
678 | }; |
679 | |
680 | LIST_HEAD(nd_prhead, nd_prefix); |
681 | |
682 | struct nd_prefix_list { |
683 | struct nd_prefix_list *next; |
684 | struct nd_prefix pr; |
685 | }; |
686 | #endif /* BSD_KERNEL_PRIVATE */ |
687 | |
688 | #if defined(PRIVATE) |
689 | struct kev_nd6_ndfailure { |
690 | struct net_event_data link_data; |
691 | }; |
692 | |
693 | struct kev_nd6_ndalive { |
694 | struct net_event_data link_data; |
695 | }; |
696 | |
697 | struct nd6_ra_prefix { |
698 | struct sockaddr_in6 prefix; |
699 | struct prf_ra raflags; |
700 | u_int32_t prefixlen; |
701 | u_int32_t origin; |
702 | u_int64_t vltime; |
703 | u_int64_t pltime; |
704 | u_int64_t expire; |
705 | u_int32_t flags; |
706 | u_int32_t refcnt; |
707 | u_int32_t if_index; |
708 | u_int32_t pad; |
709 | }; |
710 | |
711 | /* ND6 router advertisement valid bits */ |
712 | #define KEV_ND6_DATA_VALID_MTU (0x1 << 0) |
713 | #define KEV_ND6_DATA_VALID_PREFIX (0x1 << 1) |
714 | |
715 | struct kev_nd6_ra_data { |
716 | u_int32_t mtu; |
717 | u_int32_t list_index; |
718 | u_int32_t list_length; |
719 | u_int32_t flags; |
720 | struct nd6_ra_prefix prefix; |
721 | u_int32_t pad; |
722 | }; |
723 | |
724 | struct kev_nd6_event { |
725 | struct net_event_data link_data; |
726 | struct in6_addr in6_address; |
727 | uint32_t val; |
728 | }; |
729 | |
730 | struct nd6_lookup_ipv6_args { |
731 | char ifname[IFNAMSIZ]; |
732 | struct sockaddr_in6 ip6_dest; |
733 | u_int32_t ll_dest_len; |
734 | union { |
735 | char buffer[256]; |
736 | struct sockaddr_dl _sdl; |
737 | } ll_dest_; |
738 | }; |
739 | #define ll_dest_sdl ll_dest_._sdl |
740 | |
741 | #endif /* PRIVATE */ |
742 | |
743 | #if defined(BSD_KERNEL_PRIVATE) |
744 | /* nd6.c */ |
745 | extern int nd6_prune; |
746 | extern int nd6_prune_lazy; |
747 | extern int nd6_delay; |
748 | extern int nd6_umaxtries; |
749 | extern int nd6_mmaxtries; |
750 | extern int nd6_useloopback; |
751 | extern int nd6_accept_6to4; |
752 | extern int nd6_maxnudhint; |
753 | extern int nd6_gctimer; |
754 | extern struct llinfo_nd6 llinfo_nd6; |
755 | extern struct nd_drhead nd_defrouter; |
756 | extern struct nd_prhead nd_prefix; |
757 | extern int nd6_debug; |
758 | extern int nd6_onlink_ns_rfc4861; |
759 | extern int nd6_optimistic_dad; |
760 | |
761 | #define nd6log0(x) do { log x; } while (0) |
762 | #define nd6log(x) do { if (nd6_debug >= 1) log x; } while (0) |
763 | #define nd6log2(x) do { if (nd6_debug >= 2) log x; } while (0) |
764 | |
765 | #define ND6_OPTIMISTIC_DAD_LINKLOCAL (1 << 0) |
766 | #define ND6_OPTIMISTIC_DAD_AUTOCONF (1 << 1) |
767 | #define ND6_OPTIMISTIC_DAD_TEMPORARY (1 << 2) |
768 | #define ND6_OPTIMISTIC_DAD_DYNAMIC (1 << 3) |
769 | #define ND6_OPTIMISTIC_DAD_SECURED (1 << 4) |
770 | #define ND6_OPTIMISTIC_DAD_MANUAL (1 << 5) |
771 | |
772 | /* nd6_rtr.c */ |
773 | extern int nd6_defifindex; |
774 | extern int ip6_desync_factor; /* seconds */ |
775 | /* ND6_INFINITE_LIFETIME does not apply to temporary addresses */ |
776 | extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ |
777 | extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ |
778 | extern int ip6_temp_regen_advance; /* seconds */ |
779 | |
780 | union nd_opts { |
781 | struct nd_opt_hdr *nd_opt_array[16]; /* max = target address list */ |
782 | struct { |
783 | struct nd_opt_hdr *zero; |
784 | struct nd_opt_hdr *src_lladdr; |
785 | struct nd_opt_hdr *tgt_lladdr; |
786 | struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ |
787 | struct nd_opt_rd_hdr *rh; |
788 | struct nd_opt_mtu *mtu; |
789 | struct nd_opt_hdr *__res6; |
790 | struct nd_opt_hdr *__res7; |
791 | struct nd_opt_hdr *__res8; |
792 | struct nd_opt_hdr *__res9; |
793 | struct nd_opt_hdr *__res10; |
794 | struct nd_opt_hdr *__res11; |
795 | struct nd_opt_hdr *__res12; |
796 | struct nd_opt_hdr *__res13; |
797 | struct nd_opt_nonce *nonce; |
798 | struct nd_opt_hdr *__res15; |
799 | struct nd_opt_hdr *search; /* multiple opts */ |
800 | struct nd_opt_hdr *last; /* multiple opts */ |
801 | int done; |
802 | struct nd_opt_prefix_info *pi_end; /* multiple opts, end */ |
803 | } nd_opt_each; |
804 | }; |
805 | #define nd_opts_src_lladdr nd_opt_each.src_lladdr |
806 | #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr |
807 | #define nd_opts_pi nd_opt_each.pi_beg |
808 | #define nd_opts_pi_end nd_opt_each.pi_end |
809 | #define nd_opts_rh nd_opt_each.rh |
810 | #define nd_opts_mtu nd_opt_each.mtu |
811 | #define nd_opts_nonce nd_opt_each.nonce |
812 | #define nd_opts_search nd_opt_each.search |
813 | #define nd_opts_last nd_opt_each.last |
814 | #define nd_opts_done nd_opt_each.done |
815 | |
816 | /* XXX: need nd6_var.h?? */ |
817 | /* nd6.c */ |
818 | extern int nd6_sched_timeout_want; |
819 | extern void nd6_sched_timeout(struct timeval *, struct timeval *); |
820 | extern void nd6_init(void); |
821 | extern void nd6_ifreset(struct ifnet *ifp); |
822 | extern void nd6_ifattach(struct ifnet *); |
823 | extern int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *, int); |
824 | extern void nd6_option_init(void *, int, union nd_opts *); |
825 | extern struct nd_opt_hdr *nd6_option(union nd_opts *); |
826 | extern int nd6_options(union nd_opts *); |
827 | extern struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, int); |
828 | extern void nd6_setmtu(struct ifnet *); |
829 | extern void nd6_purge(struct ifnet *); |
830 | extern void nd6_free(struct rtentry *); |
831 | extern void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); |
832 | extern int nd6_resolve(struct ifnet *, struct rtentry *, |
833 | struct mbuf *, struct sockaddr *, u_char *); |
834 | extern void nd6_rtrequest(int, struct rtentry *, struct sockaddr *); |
835 | extern int nd6_ioctl(u_long, caddr_t, struct ifnet *); |
836 | extern void nd6_cache_lladdr(struct ifnet *, struct in6_addr *, |
837 | char *, int, int, int); |
838 | extern int nd6_output_list(struct ifnet *, struct ifnet *, struct mbuf *, |
839 | struct sockaddr_in6 *, struct rtentry *, struct flowadv *); |
840 | extern int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, |
841 | struct sockaddr_in6 *, struct rtentry *, struct flowadv *); |
842 | extern int nd6_storelladdr(struct ifnet *, struct rtentry *, struct mbuf *, |
843 | struct sockaddr *, u_char *); |
844 | extern int nd6_need_cache(struct ifnet *); |
845 | extern void nd6_drain(void *); |
846 | extern void nd6_post_msg(u_int32_t, struct nd_prefix_list *, u_int32_t, |
847 | u_int32_t); |
848 | extern int nd6_setifinfo(struct ifnet *, u_int32_t, u_int32_t); |
849 | extern const char *ndcache_state2str(short); |
850 | extern void ln_setexpire(struct llinfo_nd6 *, uint64_t); |
851 | |
852 | /* nd6_nbr.c */ |
853 | extern void nd6_nbr_init(void); |
854 | extern void nd6_na_input(struct mbuf *, int, int); |
855 | extern void nd6_na_output(struct ifnet *, const struct in6_addr *, |
856 | const struct in6_addr *, u_int32_t, int, struct sockaddr *); |
857 | extern void nd6_ns_input(struct mbuf *, int, int); |
858 | extern void nd6_ns_output(struct ifnet *, const struct in6_addr *, |
859 | const struct in6_addr *, struct llinfo_nd6 *, uint8_t *); |
860 | extern caddr_t nd6_ifptomac(struct ifnet *); |
861 | extern void nd6_dad_start(struct ifaddr *, int *); |
862 | extern void nd6_dad_stop(struct ifaddr *); |
863 | extern void nd6_dad_duplicated(struct ifaddr *); |
864 | extern void nd6_llreach_alloc(struct rtentry *, struct ifnet *, void *, |
865 | unsigned int, boolean_t); |
866 | extern void nd6_llreach_set_reachable(struct ifnet *, void *, unsigned int); |
867 | extern void nd6_llreach_use(struct llinfo_nd6 *); |
868 | extern void nd6_alt_node_addr_decompose(struct ifnet *, struct sockaddr *, |
869 | struct sockaddr_dl *, struct sockaddr_in6 *); |
870 | extern void nd6_alt_node_present(struct ifnet *, struct sockaddr_in6 *, |
871 | struct sockaddr_dl *, int32_t, int, int); |
872 | extern void nd6_alt_node_absent(struct ifnet *, struct sockaddr_in6 *); |
873 | |
874 | /* nd6_rtr.c */ |
875 | extern struct in6_ifaddr *in6_pfx_newpersistaddr(struct nd_prefix *, int, |
876 | int *, boolean_t); |
877 | extern void nd6_rtr_init(void); |
878 | extern void nd6_rs_input(struct mbuf *, int, int); |
879 | extern void nd6_ra_input(struct mbuf *, int, int); |
880 | extern void prelist_del(struct nd_prefix *); |
881 | extern void defrouter_select(struct ifnet *); |
882 | extern void defrouter_reset(void); |
883 | extern int defrtrlist_ioctl(u_long, caddr_t); |
884 | extern void defrtrlist_del(struct nd_defrouter *); |
885 | extern int defrtrlist_add_static(struct nd_defrouter *); |
886 | extern int defrtrlist_del_static(struct nd_defrouter *); |
887 | extern void prelist_remove(struct nd_prefix *); |
888 | extern int prelist_update(struct nd_prefix *, struct nd_defrouter *, |
889 | struct mbuf *, int); |
890 | extern int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *, |
891 | struct nd_prefix **, boolean_t); |
892 | extern int nd6_prefix_onlink(struct nd_prefix *); |
893 | extern int nd6_prefix_onlink_scoped(struct nd_prefix *, unsigned int); |
894 | extern int nd6_prefix_offlink(struct nd_prefix *); |
895 | extern void pfxlist_onlink_check(void); |
896 | extern struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *); |
897 | extern struct nd_prefix *nd6_prefix_lookup(struct nd_prefix *, int); |
898 | extern int in6_init_prefix_ltimes(struct nd_prefix *ndpr); |
899 | extern void rt6_flush(struct in6_addr *, struct ifnet *); |
900 | extern int nd6_setdefaultiface(int); |
901 | extern int in6_tmpifadd(const struct in6_ifaddr *, int); |
902 | extern void nddr_addref(struct nd_defrouter *, int); |
903 | extern struct nd_defrouter *nddr_remref(struct nd_defrouter *, int); |
904 | extern uint64_t nddr_getexpire(struct nd_defrouter *); |
905 | extern void ndpr_addref(struct nd_prefix *, int); |
906 | extern struct nd_prefix *ndpr_remref(struct nd_prefix *, int); |
907 | extern uint64_t ndpr_getexpire(struct nd_prefix *); |
908 | |
909 | /* nd6_prproxy.c */ |
910 | struct ip6_hdr; |
911 | extern u_int32_t nd6_prproxy; |
912 | extern void nd6_prproxy_init(void); |
913 | extern int nd6_if_prproxy(struct ifnet *, boolean_t); |
914 | extern void nd6_prproxy_prelist_update(struct nd_prefix *, struct nd_prefix *); |
915 | extern boolean_t nd6_prproxy_ifaddr(struct in6_ifaddr *); |
916 | extern void nd6_proxy_find_fwdroute(struct ifnet *, struct route_in6 *); |
917 | extern boolean_t nd6_prproxy_isours(struct mbuf *, struct ip6_hdr *, |
918 | struct route_in6 *, unsigned int); |
919 | extern void nd6_prproxy_ns_output(struct ifnet *, struct ifnet *, |
920 | struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *); |
921 | extern void nd6_prproxy_ns_input(struct ifnet *, struct in6_addr *, |
922 | char *, int, struct in6_addr *, struct in6_addr *, uint8_t *nonce); |
923 | extern void nd6_prproxy_na_input(struct ifnet *, struct in6_addr *, |
924 | struct in6_addr *, struct in6_addr *, int); |
925 | extern void nd6_prproxy_sols_reap(struct nd_prefix *); |
926 | extern void nd6_prproxy_sols_prune(struct nd_prefix *, u_int32_t); |
927 | extern int nd6_if_disable(struct ifnet *, boolean_t); |
928 | void in6_ifaddr_set_dadprogress(struct in6_ifaddr *ia); |
929 | #endif /* BSD_KERNEL_PRIVATE */ |
930 | |
931 | #ifdef KERNEL |
932 | |
933 | /* |
934 | * @function nd6_lookup_ipv6 |
935 | * @discussion This function will check the routing table for a cached |
936 | * neighbor discovery entry or trigger an neighbor discovery query |
937 | * to resolve the IPv6 address to a link-layer address. |
938 | * nd entries are stored in the routing table. This function will |
939 | * lookup the IPv6 destination in the routing table. If the |
940 | * destination requires forwarding to a gateway, the route of the |
941 | * gateway will be looked up. The route entry is inspected to |
942 | * determine if the link layer destination address is known. If |
943 | * unknown, neighbor discovery will be used to resolve the entry. |
944 | * @param interface The interface the packet is being sent on. |
945 | * @param ip6_dest The IPv6 destination of the packet. |
946 | * @param ll_dest On output, the link-layer destination. |
947 | * @param ll_dest_len The length of the buffer for ll_dest. |
948 | * @param hint Any routing hint passed down from the protocol. |
949 | * @param packet The packet being transmitted. |
950 | * @result May return an error such as EHOSTDOWN or ENETUNREACH. If |
951 | * this function returns EJUSTRETURN, the packet has been queued |
952 | * and will be sent when the address is resolved. If any other |
953 | * value is returned, the caller is responsible for disposing of |
954 | * the packet. |
955 | */ |
956 | extern errno_t nd6_lookup_ipv6(ifnet_t interface, |
957 | const struct sockaddr_in6 *ip6_dest, struct sockaddr_dl *ll_dest, |
958 | size_t ll_dest_len, route_t hint, mbuf_t packet); |
959 | |
960 | #endif /* KERNEL */ |
961 | |
962 | /* nd6_send.c */ |
963 | #ifdef BSD_KERNEL_PRIVATE |
964 | /* |
965 | * nd6_send_opmode |
966 | * |
967 | * value using CGA tx SEND rx SEND |
968 | * -------- --------- ------- ------- |
969 | * DISABLED NO NO NO |
970 | * QUIET YES NO NO |
971 | */ |
972 | extern int nd6_send_opstate; |
973 | |
974 | #define ND6_SEND_OPMODE_DISABLED 0 |
975 | #define ND6_SEND_OPMODE_CGA_QUIET 1 |
976 | |
977 | #endif /* BSD_KERNEL_PRIVATE */ |
978 | #endif /* _NETINET6_ND6_H_ */ |
979 | |