Line data Source code
1 : /* $OpenBSD: in6_ifattach.c,v 1.110 2018/08/26 22:30:00 mpi Exp $ */
2 : /* $KAME: in6_ifattach.c,v 1.124 2001/07/18 08:32:51 jinmei Exp $ */
3 :
4 : /*
5 : * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 : * All rights reserved.
7 : *
8 : * Redistribution and use in source and binary forms, with or without
9 : * modification, are permitted provided that the following conditions
10 : * are met:
11 : * 1. Redistributions of source code must retain the above copyright
12 : * notice, this list of conditions and the following disclaimer.
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : * 3. Neither the name of the project nor the names of its contributors
17 : * may be used to endorse or promote products derived from this software
18 : * without specific prior written permission.
19 : *
20 : * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 : * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 : * SUCH DAMAGE.
31 : */
32 :
33 : #include <sys/param.h>
34 : #include <sys/systm.h>
35 : #include <sys/socket.h>
36 : #include <sys/sockio.h>
37 : #include <sys/kernel.h>
38 : #include <sys/syslog.h>
39 :
40 : #include <crypto/sha2.h>
41 :
42 : #include <net/if.h>
43 : #include <net/if_var.h>
44 : #include <net/if_dl.h>
45 : #include <net/if_types.h>
46 : #include <net/route.h>
47 :
48 : #include <netinet/in.h>
49 :
50 : #include <netinet6/in6_var.h>
51 : #include <netinet/ip6.h>
52 : #include <netinet6/ip6_var.h>
53 : #include <netinet6/in6_ifattach.h>
54 : #include <netinet6/nd6.h>
55 : #ifdef MROUTING
56 : #include <netinet6/ip6_mroute.h>
57 : #endif
58 :
59 : void in6_get_rand_ifid(struct ifnet *, struct in6_addr *);
60 : int in6_get_hw_ifid(struct ifnet *, struct in6_addr *);
61 : int in6_get_soii_ifid(struct ifnet *, struct in6_addr *);
62 : void in6_get_ifid(struct ifnet *, struct in6_addr *);
63 : int in6_ifattach_loopback(struct ifnet *);
64 :
65 : #define EUI64_GBIT 0x01
66 : #define EUI64_UBIT 0x02
67 : #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
68 : #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
69 : #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
70 : #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
71 : #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
72 :
73 : #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
74 : #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
75 :
76 : void
77 0 : in6_soiiupdate(struct ifnet *ifp)
78 : {
79 : struct ifaddr *ifa;
80 :
81 0 : NET_ASSERT_LOCKED();
82 :
83 : /*
84 : * Update the link-local address.
85 : */
86 0 : ifa = &in6ifa_ifpforlinklocal(ifp, 0)->ia_ifa;
87 0 : if (ifa) {
88 0 : in6_purgeaddr(ifa);
89 0 : dohooks(ifp->if_addrhooks, 0);
90 0 : in6_ifattach(ifp);
91 0 : }
92 0 : }
93 :
94 : /*
95 : * Generate a random interface identifier.
96 : *
97 : * in6 - upper 64bits are preserved
98 : */
99 : void
100 0 : in6_get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
101 : {
102 0 : arc4random_buf(&in6->s6_addr32[2], 8);
103 :
104 : /* make sure to set "u" bit to local, and "g" bit to individual. */
105 0 : in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
106 0 : in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
107 :
108 : /* convert EUI64 into IPv6 interface identifier */
109 0 : EUI64_TO_IFID(in6);
110 0 : }
111 :
112 : /*
113 : * Get interface identifier for the specified interface.
114 : *
115 : * in6 - upper 64bits are preserved
116 : */
117 : int
118 0 : in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
119 : {
120 : struct sockaddr_dl *sdl;
121 : char *addr;
122 : size_t addrlen;
123 : static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
124 : static u_int8_t allone[8] =
125 : { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
126 :
127 0 : sdl = ifp->if_sadl;
128 0 : if (sdl == NULL || sdl->sdl_alen == 0)
129 0 : return -1;
130 :
131 0 : addr = LLADDR(sdl);
132 0 : addrlen = sdl->sdl_alen;
133 :
134 0 : switch (ifp->if_type) {
135 : case IFT_IEEE1394:
136 : case IFT_IEEE80211:
137 : /* IEEE1394 uses 16byte length address starting with EUI64 */
138 0 : if (addrlen > 8)
139 0 : addrlen = 8;
140 : break;
141 : default:
142 : break;
143 : }
144 :
145 : /* get EUI64 */
146 0 : switch (ifp->if_type) {
147 : /* IEEE802/EUI64 cases - what others? */
148 : case IFT_ETHER:
149 : case IFT_CARP:
150 : case IFT_IEEE1394:
151 : case IFT_IEEE80211:
152 : /* look at IEEE802/EUI64 only */
153 0 : if (addrlen != 8 && addrlen != 6)
154 0 : return -1;
155 :
156 : /*
157 : * check for invalid MAC address - on bsdi, we see it a lot
158 : * since wildboar configures all-zero MAC on pccard before
159 : * card insertion.
160 : */
161 0 : if (bcmp(addr, allzero, addrlen) == 0)
162 0 : return -1;
163 0 : if (bcmp(addr, allone, addrlen) == 0)
164 0 : return -1;
165 :
166 : /* make EUI64 address */
167 0 : if (addrlen == 8)
168 0 : memcpy(&in6->s6_addr[8], addr, 8);
169 0 : else if (addrlen == 6) {
170 0 : in6->s6_addr[8] = addr[0];
171 0 : in6->s6_addr[9] = addr[1];
172 0 : in6->s6_addr[10] = addr[2];
173 0 : in6->s6_addr[11] = 0xff;
174 0 : in6->s6_addr[12] = 0xfe;
175 0 : in6->s6_addr[13] = addr[3];
176 0 : in6->s6_addr[14] = addr[4];
177 0 : in6->s6_addr[15] = addr[5];
178 0 : }
179 : break;
180 :
181 : case IFT_GIF:
182 : /*
183 : * RFC2893 says: "SHOULD use IPv4 address as ifid source".
184 : * however, IPv4 address is not very suitable as unique
185 : * identifier source (can be renumbered).
186 : * we don't do this.
187 : */
188 0 : return -1;
189 :
190 : default:
191 0 : return -1;
192 : }
193 :
194 : /* sanity check: g bit must not indicate "group" */
195 0 : if (EUI64_GROUP(in6))
196 0 : return -1;
197 :
198 : /* convert EUI64 into IPv6 interface identifier */
199 0 : EUI64_TO_IFID(in6);
200 :
201 : /*
202 : * sanity check: ifid must not be all zero, avoid conflict with
203 : * subnet router anycast
204 : */
205 0 : if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
206 0 : bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
207 0 : return -1;
208 : }
209 :
210 0 : return 0;
211 0 : }
212 :
213 : /*
214 : * Generate a Semantically Opaque Interface Identifier according to RFC 7217
215 : *
216 : * in6 - upper 64bits are preserved
217 : */
218 : int
219 0 : in6_get_soii_ifid(struct ifnet *ifp0, struct in6_addr *in6)
220 : {
221 : struct ifnet *ifp;
222 0 : SHA2_CTX ctx;
223 0 : u_int8_t digest[SHA512_DIGEST_LENGTH];
224 0 : struct in6_addr prefix;
225 : struct sockaddr_dl *sdl;
226 0 : int dad_counter = 0; /* XXX not used */
227 : char *addr;
228 :
229 0 : if (ifp0->if_xflags & IFXF_INET6_NOSOII)
230 0 : return -1;
231 :
232 0 : sdl = ifp0->if_sadl;
233 :
234 0 : if (sdl == NULL || sdl->sdl_alen == 0) {
235 : /*
236 : * try to get it from some other hardware interface like
237 : * in in6_get_ifid()
238 : */
239 0 : TAILQ_FOREACH(ifp, &ifnet, if_list) {
240 0 : if (ifp == ifp0)
241 : continue;
242 0 : sdl = ifp->if_sadl;
243 0 : if (sdl != NULL && sdl->sdl_alen != 0)
244 : break;
245 : }
246 : }
247 :
248 0 : if (sdl == NULL || sdl->sdl_alen == 0)
249 0 : return -1;
250 :
251 0 : memset(&prefix, 0, sizeof(prefix));
252 0 : prefix.s6_addr16[0] = htons(0xfe80);
253 0 : addr = LLADDR(sdl);
254 :
255 0 : SHA512Init(&ctx);
256 :
257 0 : SHA512Update(&ctx, &prefix, sizeof(prefix));
258 0 : SHA512Update(&ctx, addr, sdl->sdl_alen);
259 0 : SHA512Update(&ctx, &dad_counter, sizeof(dad_counter));
260 0 : SHA512Update(&ctx, ip6_soiikey, sizeof(ip6_soiikey));
261 0 : SHA512Final(digest, &ctx);
262 :
263 0 : memcpy(&in6->s6_addr[8], digest + (sizeof(digest) - 8), 8);
264 :
265 0 : return 0;
266 0 : }
267 :
268 : /*
269 : * Get interface identifier for the specified interface. If it is not
270 : * available on ifp0, borrow interface identifier from other information
271 : * sources.
272 : */
273 : void
274 0 : in6_get_ifid(struct ifnet *ifp0, struct in6_addr *in6)
275 : {
276 : struct ifnet *ifp;
277 :
278 : /* first, try to generate a Semantically Opaque Interface Identifier */
279 0 : if (in6_get_soii_ifid(ifp0, in6) == 0) {
280 0 : nd6log((LOG_DEBUG, "%s: got Semantically Opaque Interface "
281 : "Identifier\n", ifp0->if_xname));
282 : goto success;
283 : }
284 :
285 : /* next, try to get it from the interface itself */
286 0 : if (in6_get_hw_ifid(ifp0, in6) == 0) {
287 0 : nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
288 : ifp0->if_xname));
289 : goto success;
290 : }
291 :
292 : /* next, try to get it from some other hardware interface */
293 0 : TAILQ_FOREACH(ifp, &ifnet, if_list) {
294 0 : if (ifp == ifp0)
295 : continue;
296 0 : if (in6_get_hw_ifid(ifp, in6) == 0)
297 : goto success;
298 : }
299 :
300 : /* last resort: get from random number source */
301 0 : in6_get_rand_ifid(ifp, in6);
302 0 : nd6log((LOG_DEBUG,
303 : "%s: interface identifier generated by random number\n",
304 : ifp0->if_xname));
305 : success:
306 0 : nd6log((LOG_INFO, "%s: ifid: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
307 : ifp0->if_xname, in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
308 : in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
309 : in6->s6_addr[14], in6->s6_addr[15]));
310 0 : }
311 :
312 : /*
313 : * ifid - used as EUI64 if not NULL, overrides other EUI64 sources
314 : */
315 :
316 : int
317 0 : in6_ifattach_linklocal(struct ifnet *ifp, struct in6_addr *ifid)
318 : {
319 0 : struct in6_aliasreq ifra;
320 : struct in6_ifaddr *ia6;
321 : int error, flags;
322 :
323 0 : NET_ASSERT_LOCKED();
324 :
325 : /*
326 : * configure link-local address.
327 : */
328 0 : bzero(&ifra, sizeof(ifra));
329 0 : strncpy(ifra.ifra_name, ifp->if_xname, sizeof(ifra.ifra_name));
330 0 : ifra.ifra_addr.sin6_family = AF_INET6;
331 0 : ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
332 0 : ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
333 0 : ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
334 0 : ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
335 0 : if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
336 0 : ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
337 0 : ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
338 0 : } else if (ifid) {
339 0 : ifra.ifra_addr.sin6_addr = *ifid;
340 0 : ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
341 0 : ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
342 0 : ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
343 0 : ifra.ifra_addr.sin6_addr.s6_addr[8] &= ~EUI64_GBIT;
344 0 : ifra.ifra_addr.sin6_addr.s6_addr[8] |= EUI64_UBIT;
345 0 : } else
346 0 : in6_get_ifid(ifp, &ifra.ifra_addr.sin6_addr);
347 :
348 0 : ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
349 0 : ifra.ifra_prefixmask.sin6_family = AF_INET6;
350 0 : ifra.ifra_prefixmask.sin6_addr = in6mask64;
351 : /* link-local addresses should NEVER expire. */
352 0 : ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
353 0 : ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
354 :
355 : /*
356 : * XXX: Some P2P interfaces seem not to send packets just after
357 : * becoming up, so we skip p2p interfaces for safety.
358 : */
359 0 : if (in6if_do_dad(ifp) && ((ifp->if_flags & IFF_POINTOPOINT) == 0))
360 0 : ifra.ifra_flags |= IN6_IFF_TENTATIVE;
361 :
362 0 : error = in6_update_ifa(ifp, &ifra, in6ifa_ifpforlinklocal(ifp, 0));
363 0 : if (error != 0)
364 0 : return (error);
365 :
366 0 : ia6 = in6ifa_ifpforlinklocal(ifp, 0);
367 :
368 : /* Perform DAD, if needed. */
369 0 : if (ia6->ia6_flags & IN6_IFF_TENTATIVE)
370 0 : nd6_dad_start(&ia6->ia_ifa);
371 :
372 0 : if (ifp->if_flags & IFF_LOOPBACK) {
373 0 : dohooks(ifp->if_addrhooks, 0);
374 0 : return (0); /* No need to install a connected route. */
375 : }
376 :
377 : flags = RTF_CONNECTED;
378 0 : if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
379 0 : flags |= RTF_CLONING;
380 :
381 0 : error = rt_ifa_add(&ia6->ia_ifa, flags, ia6->ia_ifa.ifa_addr);
382 0 : if (error) {
383 0 : in6_purgeaddr(&ia6->ia_ifa);
384 0 : return (error);
385 : }
386 0 : dohooks(ifp->if_addrhooks, 0);
387 :
388 0 : return (0);
389 0 : }
390 :
391 : int
392 0 : in6_ifattach_loopback(struct ifnet *ifp)
393 : {
394 0 : struct in6_addr in6 = in6addr_loopback;
395 0 : struct in6_aliasreq ifra;
396 :
397 0 : KASSERT(ifp->if_flags & IFF_LOOPBACK);
398 :
399 0 : if (in6ifa_ifpwithaddr(ifp, &in6) != NULL)
400 0 : return (0);
401 :
402 0 : bzero(&ifra, sizeof(ifra));
403 0 : strncpy(ifra.ifra_name, ifp->if_xname, sizeof(ifra.ifra_name));
404 0 : ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
405 0 : ifra.ifra_prefixmask.sin6_family = AF_INET6;
406 0 : ifra.ifra_prefixmask.sin6_addr = in6mask128;
407 :
408 : /*
409 : * Always initialize ia_dstaddr (= broadcast address) to loopback
410 : * address. Follows IPv4 practice - see in_ifinit().
411 : */
412 0 : ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
413 0 : ifra.ifra_dstaddr.sin6_family = AF_INET6;
414 0 : ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
415 :
416 0 : ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
417 0 : ifra.ifra_addr.sin6_family = AF_INET6;
418 0 : ifra.ifra_addr.sin6_addr = in6addr_loopback;
419 :
420 : /* the loopback address should NEVER expire. */
421 0 : ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
422 0 : ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
423 :
424 : /*
425 : * We are sure that this is a newly assigned address, so we can set
426 : * NULL to the 3rd arg.
427 : */
428 0 : return (in6_update_ifa(ifp, &ifra, NULL));
429 0 : }
430 :
431 : /*
432 : * compute NI group address, based on the current hostname setting.
433 : * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
434 : *
435 : * when ifp == NULL, the caller is responsible for filling scopeid.
436 : */
437 : int
438 0 : in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
439 : struct sockaddr_in6 *sa6)
440 : {
441 : const char *p;
442 : u_int8_t *q;
443 0 : SHA2_CTX ctx;
444 0 : u_int8_t digest[SHA512_DIGEST_LENGTH];
445 0 : u_int8_t l;
446 0 : u_int8_t n[64]; /* a single label must not exceed 63 chars */
447 :
448 0 : if (!namelen || !name)
449 0 : return -1;
450 :
451 : p = name;
452 0 : while (p && *p && *p != '.' && p - name < namelen)
453 0 : p++;
454 0 : if (p - name > sizeof(n) - 1)
455 0 : return -1; /* label too long */
456 0 : l = p - name;
457 0 : strncpy((char *)n, name, l);
458 0 : n[(int)l] = '\0';
459 0 : for (q = n; *q; q++) {
460 0 : if ('A' <= *q && *q <= 'Z')
461 0 : *q = *q - 'A' + 'a';
462 : }
463 :
464 : /* generate 8 bytes of pseudo-random value. */
465 0 : SHA512Init(&ctx);
466 0 : SHA512Update(&ctx, &l, sizeof(l));
467 0 : SHA512Update(&ctx, n, l);
468 0 : SHA512Final(digest, &ctx);
469 :
470 0 : bzero(sa6, sizeof(*sa6));
471 0 : sa6->sin6_family = AF_INET6;
472 0 : sa6->sin6_len = sizeof(*sa6);
473 0 : sa6->sin6_addr.s6_addr16[0] = htons(0xff02);
474 0 : sa6->sin6_addr.s6_addr16[1] = htons(ifp->if_index);
475 0 : sa6->sin6_addr.s6_addr8[11] = 2;
476 0 : memcpy(&sa6->sin6_addr.s6_addr32[3], digest,
477 : sizeof(sa6->sin6_addr.s6_addr32[3]));
478 :
479 0 : return 0;
480 0 : }
481 :
482 : /*
483 : * XXX multiple loopback interface needs more care. for instance,
484 : * nodelocal address needs to be configured onto only one of them.
485 : * XXX multiple link-local address case
486 : */
487 : int
488 0 : in6_ifattach(struct ifnet *ifp)
489 : {
490 : /* some of the interfaces are inherently not IPv6 capable */
491 0 : switch (ifp->if_type) {
492 : case IFT_BRIDGE:
493 : case IFT_ENC:
494 : case IFT_PFLOG:
495 : case IFT_PFSYNC:
496 0 : return (0);
497 : }
498 :
499 : /*
500 : * if link mtu is too small, don't try to configure IPv6.
501 : * remember there could be some link-layer that has special
502 : * fragmentation logic.
503 : */
504 0 : if (ifp->if_mtu < IPV6_MMTU)
505 0 : return (EINVAL);
506 :
507 0 : if ((ifp->if_flags & IFF_MULTICAST) == 0)
508 0 : return (EINVAL);
509 :
510 : /*
511 : * Assign loopback address if this lo(4) interface is the
512 : * default for its rdomain.
513 : */
514 0 : if ((ifp->if_flags & IFF_LOOPBACK) &&
515 0 : (ifp->if_index == rtable_loindex(ifp->if_rdomain))) {
516 : int error;
517 :
518 0 : error = in6_ifattach_loopback(ifp);
519 0 : if (error)
520 0 : return (error);
521 0 : }
522 :
523 : /* Assign a link-local address, if there's none. */
524 0 : if (in6ifa_ifpforlinklocal(ifp, 0) == NULL) {
525 0 : if (in6_ifattach_linklocal(ifp, NULL) != 0) {
526 : /* failed to assign linklocal address. bark? */
527 : }
528 0 : }
529 :
530 0 : return (0);
531 0 : }
532 :
533 : /*
534 : * NOTE: in6_ifdetach() does not support loopback if at this moment.
535 : */
536 : void
537 0 : in6_ifdetach(struct ifnet *ifp)
538 : {
539 : struct ifaddr *ifa, *next;
540 : struct rtentry *rt;
541 0 : struct sockaddr_in6 sin6;
542 :
543 : #ifdef MROUTING
544 : /* remove ip6_mrouter stuff */
545 0 : ip6_mrouter_detach(ifp);
546 : #endif
547 :
548 : /* nuke any of IPv6 addresses we have */
549 0 : TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrlist, ifa_list, next) {
550 0 : if (ifa->ifa_addr->sa_family != AF_INET6)
551 : continue;
552 0 : in6_purgeaddr(ifa);
553 0 : dohooks(ifp->if_addrhooks, 0);
554 0 : }
555 :
556 : /*
557 : * Remove neighbor management table. Must be called after
558 : * purging addresses.
559 : */
560 0 : nd6_purge(ifp);
561 :
562 : /* remove route to interface local allnodes multicast (ff01::1) */
563 0 : bzero(&sin6, sizeof(sin6));
564 0 : sin6.sin6_len = sizeof(struct sockaddr_in6);
565 0 : sin6.sin6_family = AF_INET6;
566 0 : sin6.sin6_addr = in6addr_intfacelocal_allnodes;
567 0 : sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
568 0 : rt = rtalloc(sin6tosa(&sin6), 0, ifp->if_rdomain);
569 0 : if (rt && rt->rt_ifidx == ifp->if_index) {
570 0 : rtdeletemsg(rt, ifp, ifp->if_rdomain);
571 0 : rtfree(rt);
572 0 : }
573 :
574 : /* remove route to link-local allnodes multicast (ff02::1) */
575 0 : bzero(&sin6, sizeof(sin6));
576 0 : sin6.sin6_len = sizeof(struct sockaddr_in6);
577 0 : sin6.sin6_family = AF_INET6;
578 0 : sin6.sin6_addr = in6addr_linklocal_allnodes;
579 0 : sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
580 0 : rt = rtalloc(sin6tosa(&sin6), 0, ifp->if_rdomain);
581 0 : if (rt && rt->rt_ifidx == ifp->if_index) {
582 0 : rtdeletemsg(rt, ifp, ifp->if_rdomain);
583 0 : rtfree(rt);
584 0 : }
585 :
586 0 : if (ifp->if_xflags & IFXF_AUTOCONF6)
587 0 : ifp->if_xflags &= ~IFXF_AUTOCONF6;
588 0 : }
|
