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
77struct 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 jinmei@kame.net)
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)
164struct nd_ifinfo {
165#else
166/* For binary compatibility, this structure must not change */
167/* NOTE: nd_ifinfo is defined in nd6_var.h */
168struct 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
210extern int dad_enhanced;
211#define ND6_DAD_ENHANCED_DEFAULT 1
212
213struct 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)
223struct 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
232struct 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
245struct 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
261extern int nd6_process_rti;
262
263struct 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
274struct 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
293struct 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)
303struct 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
312struct 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
322struct 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)
339struct 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
355struct 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
373struct 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)
389struct 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
404struct 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
420struct 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)
442struct in6_ndireq {
443 char ifname[IFNAMSIZ];
444 struct nd_ifinfo ndi;
445};
446#else
447struct in6_ndireq {
448 char ifname[IFNAMSIZ];
449 struct nd_ifinfo_compat ndi;
450};
451#endif /* !BSD_KERNEL_PRIVATE */
452
453struct 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)
462struct in6_ndifreq_32 {
463 char ifname[IFNAMSIZ];
464 u_int32_t ifindex;
465};
466
467struct 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
544TAILQ_HEAD(nd_drhead, nd_defrouter);
545struct 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
600TAILQ_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 */
608struct 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
615struct nd_route_info *ndrti_alloc(void);
616void nd6_rti_list_wait(const char *);
617void nd6_rti_list_signal_done(void);
618void ndrti_free(struct nd_route_info *rti);
619void nd6_rtilist_remove(struct nd_route_info *);
620void nd6_rtilist_update(struct nd_route_info *, struct nd_defrouter *);
621int nd6_rtilist_add(struct nd_route_info *, struct nd_defrouter *,
622 struct nd_route_info **);
623void nd6_rti_purge(struct nd_route_info *);
624
625/* define struct prproxy_sols_tree */
626RB_HEAD(prproxy_sols_tree, nd6_prproxy_soltgt);
627
628struct 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 */
711struct 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
733struct nd_pfxrouter {
734 LIST_ENTRY(nd_pfxrouter) pfr_entry;
735#define pfr_next pfr_entry.le_next
736 struct nd_defrouter *router;
737};
738
739LIST_HEAD(nd_prhead, nd_prefix);
740
741struct 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)
748struct kev_nd6_ndfailure {
749 struct net_event_data link_data;
750};
751
752struct kev_nd6_ndalive {
753 struct net_event_data link_data;
754};
755
756struct 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
774struct 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
783struct kev_nd6_event {
784 struct net_event_data link_data;
785 struct in6_addr in6_address;
786 uint32_t val;
787};
788
789struct 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 */
804extern int nd6_prune;
805extern int nd6_prune_lazy;
806extern int nd6_delay;
807extern int nd6_umaxtries;
808extern int nd6_mmaxtries;
809extern int nd6_useloopback;
810extern int nd6_accept_6to4;
811extern int nd6_maxnudhint;
812extern int nd6_gctimer;
813extern struct llinfo_nd6 llinfo_nd6;
814extern struct nd_drhead nd_defrouter_list;
815extern struct nd_rtihead nd_rti_list;
816extern struct nd_prhead nd_prefix;
817extern int nd6_debug;
818extern int nd6_onlink_ns_rfc4861;
819extern 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 */
840extern int nd6_defifindex;
841extern int ip6_desync_factor; /* seconds */
842/* ND6_INFINITE_LIFETIME does not apply to temporary addresses */
843extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
844extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
845extern int ip6_temp_regen_advance; /* seconds */
846
847union 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 */
898extern int nd6_sched_timeout_want;
899extern void nd6_sched_timeout(struct timeval *, struct timeval *);
900extern void nd6_init(void);
901extern void nd6_ifreset(struct ifnet *ifp);
902extern void nd6_ifattach(struct ifnet *);
903extern int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *, int);
904extern void nd6_option_init(void *, int, union nd_opts *);
905extern struct nd_opt_hdr *nd6_option(union nd_opts *);
906extern int nd6_options(union nd_opts *);
907extern struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, int);
908extern void nd6_setmtu(struct ifnet *);
909extern void nd6_purge(struct ifnet *);
910extern void nd6_free(struct rtentry *);
911extern void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
912extern int nd6_resolve(struct ifnet *, struct rtentry *,
913 struct mbuf *, struct sockaddr *, u_char *);
914extern void nd6_rtrequest(int, struct rtentry *, struct sockaddr *);
915extern int nd6_ioctl(u_long, caddr_t, struct ifnet *);
916extern void nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
917 char *, int, int, int, int *);
918extern int nd6_output_list(struct ifnet *, struct ifnet *, struct mbuf *,
919 struct sockaddr_in6 *, struct rtentry *, struct flowadv *);
920extern int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *,
921 struct sockaddr_in6 *, struct rtentry *, struct flowadv *);
922extern int nd6_storelladdr(struct ifnet *, struct rtentry *, struct mbuf *,
923 struct sockaddr *, u_char *);
924extern int nd6_need_cache(struct ifnet *);
925extern void nd6_drain(void *);
926extern void nd6_post_msg(u_int32_t, struct nd_prefix_list *, u_int32_t,
927 u_int32_t);
928extern int nd6_setifinfo(struct ifnet *, u_int32_t, u_int32_t);
929extern const char *ndcache_state2str(short);
930extern void ln_setexpire(struct llinfo_nd6 *, uint64_t);
931
932/* nd6_nbr.c */
933extern void nd6_nbr_init(void);
934extern void nd6_na_input(struct mbuf *, int, int);
935extern void nd6_na_output(struct ifnet *, const struct in6_addr *,
936 const struct in6_addr *, u_int32_t, int, struct sockaddr *);
937extern void nd6_ns_input(struct mbuf *, int, int);
938extern void nd6_ns_output(struct ifnet *, const struct in6_addr *,
939 const struct in6_addr *, struct llinfo_nd6 *, uint8_t *);
940extern caddr_t nd6_ifptomac(struct ifnet *);
941extern void nd6_dad_start(struct ifaddr *, int *);
942extern void nd6_dad_stop(struct ifaddr *);
943extern void nd6_llreach_alloc(struct rtentry *, struct ifnet *, void *,
944 unsigned int, boolean_t);
945extern void nd6_llreach_set_reachable(struct ifnet *, void *, unsigned int);
946extern void nd6_llreach_use(struct llinfo_nd6 *);
947extern void nd6_alt_node_addr_decompose(struct ifnet *, struct sockaddr *,
948 struct sockaddr_dl *, struct sockaddr_in6 *);
949extern int nd6_alt_node_present(struct ifnet *, struct sockaddr_in6 *,
950 struct sockaddr_dl *, int32_t, int, int);
951extern int nd6_alt_node_absent(struct ifnet *, struct sockaddr_in6 *, struct sockaddr_dl *);
952
953/* nd6_rtr.c */
954extern struct in6_ifaddr *in6_pfx_newpersistaddr(struct nd_prefix *, int,
955 int *, boolean_t, uint8_t);
956extern void nd6_rtr_init(void);
957extern void nd6_rs_input(struct mbuf *, int, int);
958extern void nd6_ra_input(struct mbuf *, int, int);
959extern void prelist_del(struct nd_prefix *);
960extern struct nd_defrouter *defrtrlist_update(struct nd_defrouter *,
961 struct nd_drhead *);
962extern void defrouter_select(struct ifnet *, struct nd_drhead *);
963extern void defrouter_reset(void);
964extern int defrtrlist_ioctl(u_long, caddr_t);
965extern void defrtrlist_del(struct nd_defrouter *, struct nd_drhead *);
966extern int defrtrlist_add_static(struct nd_defrouter *);
967extern int defrtrlist_del_static(struct nd_defrouter *);
968extern void prelist_remove(struct nd_prefix *);
969extern int prelist_update(struct nd_prefix *, struct nd_defrouter *,
970 struct mbuf *, int);
971extern int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *,
972 struct nd_prefix **, boolean_t);
973extern int nd6_prefix_onlink(struct nd_prefix *);
974extern int nd6_prefix_onlink_scoped(struct nd_prefix *, unsigned int);
975extern int nd6_prefix_offlink(struct nd_prefix *);
976extern void pfxlist_onlink_check(void);
977extern void defrouter_set_reachability(struct in6_addr *, struct ifnet *, boolean_t);
978extern struct nd_defrouter *defrouter_lookup(struct nd_drhead *,
979 struct in6_addr *, struct ifnet *);
980extern struct nd_pfxrouter *pfxrtr_lookup(struct nd_prefix *, struct nd_defrouter *);
981extern struct nd_prefix *nd6_prefix_lookup(struct nd_prefix *, int);
982extern int in6_init_prefix_ltimes(struct nd_prefix *ndpr);
983extern void rt6_flush(struct in6_addr *, struct ifnet *);
984extern int nd6_setdefaultiface(int);
985extern int in6_tmpifadd(const struct in6_ifaddr *, int);
986extern void nddr_addref(struct nd_defrouter *);
987extern struct nd_defrouter *nddr_remref(struct nd_defrouter *);
988extern uint64_t nddr_getexpire(struct nd_defrouter *);
989extern void ndpr_addref(struct nd_prefix *);
990extern struct nd_prefix *ndpr_remref(struct nd_prefix *);
991extern uint64_t ndpr_getexpire(struct nd_prefix *);
992
993/* nd6_prproxy.c */
994struct ip6_hdr;
995extern u_int32_t nd6_prproxy;
996extern int nd6_if_prproxy(struct ifnet *, boolean_t);
997extern void nd6_prproxy_prelist_update(struct nd_prefix *, struct nd_prefix *);
998extern boolean_t nd6_prproxy_ifaddr(struct in6_ifaddr *);
999extern void nd6_proxy_find_fwdroute(struct ifnet *, struct route_in6 *);
1000extern boolean_t nd6_prproxy_isours(struct mbuf *, struct ip6_hdr *,
1001 struct route_in6 *, unsigned int);
1002extern void nd6_prproxy_ns_output(struct ifnet *, struct ifnet *,
1003 struct in6_addr *, struct in6_addr *, struct llinfo_nd6 *);
1004extern void nd6_prproxy_ns_input(struct ifnet *, struct in6_addr *,
1005 char *, int, struct in6_addr *, struct in6_addr *, uint8_t *nonce);
1006extern void nd6_prproxy_na_input(struct ifnet *, struct in6_addr *,
1007 struct in6_addr *, struct in6_addr *, int);
1008extern void nd6_prproxy_sols_reap(struct nd_prefix *);
1009extern void nd6_prproxy_sols_prune(struct nd_prefix *, u_int32_t);
1010extern int nd6_if_disable(struct ifnet *, boolean_t);
1011void 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 */
1039extern 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 */
1055extern 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