1 /* $FreeBSD: src/sys/netinet6/in6_ifattach.c,v 1.2.2.6 2002/04/28 05:40:26 suz Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6_ifattach.c,v 1.22 2008/03/07 11:34:21 sephe Exp $ */
3 /* $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/malloc.h>
37 #include <sys/socket.h>
38 #include <sys/sockio.h>
39 #include <sys/kernel.h>
40 #include <sys/syslog.h>
42 #include <sys/thread2.h>
45 #include <net/if_dl.h>
46 #include <net/if_types.h>
47 #include <net/route.h>
49 #include <netinet/in.h>
50 #include <netinet/in_var.h>
51 #include <netinet/if_ether.h>
52 #include <netinet/in_pcb.h>
53 #include <netinet/udp_var.h>
55 #include <netinet/ip6.h>
56 #include <netinet6/ip6_var.h>
57 #include <netinet6/in6_var.h>
58 #include <netinet6/in6_pcb.h>
59 #include <netinet6/in6_ifattach.h>
60 #include <netinet6/ip6_var.h>
61 #include <netinet6/nd6.h>
62 #include <netinet6/scope6_var.h>
64 #include <net/net_osdep.h>
66 unsigned long in6_maxmtu = 0;
68 #ifdef IP6_AUTO_LINKLOCAL
69 int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
71 int ip6_auto_linklocal = 1; /* enable by default */
74 struct callout in6_tmpaddrtimer_ch;
76 extern struct inpcbinfo ripcbinfo;
78 static int get_rand_ifid (struct ifnet *, struct in6_addr *);
79 static int generate_tmp_ifid (u_int8_t *, const u_int8_t *, u_int8_t *);
80 static int get_hw_ifid (struct ifnet *, struct in6_addr *);
81 static int get_ifid (struct ifnet *, struct ifnet *, struct in6_addr *);
82 static int in6_ifattach_linklocal (struct ifnet *, struct ifnet *);
83 static int in6_ifattach_loopback (struct ifnet *);
85 #define EUI64_GBIT 0x01
86 #define EUI64_UBIT 0x02
87 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
88 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
89 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
90 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
91 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
93 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
94 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
97 * Generate a last-resort interface identifier, when the machine has no
98 * IEEE802/EUI64 address sources.
99 * The goal here is to get an interface identifier that is
100 * (1) random enough and (2) does not change across reboot.
101 * We currently use MD5(hostname) for it.
104 get_rand_ifid(struct ifnet *ifp,
105 struct in6_addr *in6) /* upper 64bits are preserved */
109 int hostnamelen = strlen(hostname);
112 /* we need at least several letters as seed for ifid */
117 /* generate 8 bytes of pseudo-random value. */
118 bzero(&ctxt, sizeof(ctxt));
120 MD5Update(&ctxt, hostname, hostnamelen);
121 MD5Final(digest, &ctxt);
123 /* assumes sizeof(digest) > sizeof(ifid) */
124 bcopy(digest, &in6->s6_addr[8], 8);
126 /* make sure to set "u" bit to local, and "g" bit to individual. */
127 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
128 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
130 /* convert EUI64 into IPv6 interface identifier */
137 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
140 u_int8_t seed[16], digest[16], nullbuf[8];
144 /* If there's no hisotry, start with a random seed. */
145 bzero(nullbuf, sizeof(nullbuf));
146 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
149 for (i = 0; i < 2; i++) {
151 val32 = krandom() ^ tv.tv_usec;
152 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
155 bcopy(seed0, seed, 8);
158 /* copy the right-most 64-bits of the given address */
159 /* XXX assumption on the size of IFID */
160 bcopy(seed1, &seed[8], 8);
162 if (0) { /* for debugging purposes only */
165 kprintf("generate_tmp_ifid: new randomized ID from: ");
166 for (i = 0; i < 16; i++)
167 kprintf("%02x", seed[i]);
171 /* generate 16 bytes of pseudo-random value. */
172 bzero(&ctxt, sizeof(ctxt));
174 MD5Update(&ctxt, seed, sizeof(seed));
175 MD5Final(digest, &ctxt);
178 * RFC 3041 3.2.1. (3)
179 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
180 * left-most bit is numbered 0) to zero.
182 bcopy(digest, ret, 8);
183 ret[0] &= ~EUI64_UBIT;
186 * XXX: we'd like to ensure that the generated value is not zero
187 * for simplicity. If the caclculated digest happens to be zero,
188 * use a random non-zero value as the last resort.
190 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
192 "generate_tmp_ifid: computed MD5 value is zero.\n");
195 val32 = krandom() ^ tv.tv_usec;
196 val32 = 1 + (val32 % (0xffffffff - 1));
200 * RFC 3041 3.2.1. (4)
201 * Take the rightmost 64-bits of the MD5 digest and save them in
202 * stable storage as the history value to be used in the next
203 * iteration of the algorithm.
205 bcopy(&digest[8], seed0, 8);
207 if (0) { /* for debugging purposes only */
211 for (i = 0; i < 16; i++)
212 kprintf("%02x", digest[i]);
220 * Get interface identifier for the specified interface.
221 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
224 get_hw_ifid(struct ifnet *ifp,
225 struct in6_addr *in6) /* upper 64bits are preserved */
227 struct ifaddr_container *ifac;
228 struct sockaddr_dl *sdl;
231 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
232 static u_int8_t allone[8] =
233 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
235 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
236 struct ifaddr *ifa = ifac->ifa;
238 if (ifa->ifa_addr->sa_family != AF_LINK)
240 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
243 if (sdl->sdl_alen == 0)
253 addrlen = sdl->sdl_alen;
256 switch (ifp->if_type) {
263 /* IEEE802/EUI64 cases - what others? */
264 /* IEEE1394 uses 16byte length address starting with EUI64 */
268 /* look at IEEE802/EUI64 only */
269 if (addrlen != 8 && addrlen != 6)
273 * check for invalid MAC address - on bsdi, we see it a lot
274 * since wildboar configures all-zero MAC on pccard before
277 if (bcmp(addr, allzero, addrlen) == 0)
279 if (bcmp(addr, allone, addrlen) == 0)
282 /* make EUI64 address */
284 bcopy(addr, &in6->s6_addr[8], 8);
285 else if (addrlen == 6) {
286 in6->s6_addr[8] = addr[0];
287 in6->s6_addr[9] = addr[1];
288 in6->s6_addr[10] = addr[2];
289 in6->s6_addr[11] = 0xff;
290 in6->s6_addr[12] = 0xfe;
291 in6->s6_addr[13] = addr[3];
292 in6->s6_addr[14] = addr[4];
293 in6->s6_addr[15] = addr[5];
301 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
302 * however, IPv4 address is not very suitable as unique
303 * identifier source (can be renumbered).
312 /* sanity check: g bit must not indicate "group" */
313 if (EUI64_GROUP(in6))
316 /* convert EUI64 into IPv6 interface identifier */
320 * sanity check: ifid must not be all zero, avoid conflict with
321 * subnet router anycast
323 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
324 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
332 * Get interface identifier for the specified interface. If it is not
333 * available on ifp0, borrow interface identifier from other information
337 get_ifid(struct ifnet *ifp0,
338 struct ifnet *altifp, /* secondary EUI64 source */
339 struct in6_addr *in6)
343 /* first, try to get it from the interface itself */
344 if (get_hw_ifid(ifp0, in6) == 0) {
345 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
350 /* try secondary EUI64 source. this basically is for ATM PVC */
351 if (altifp && get_hw_ifid(altifp, in6) == 0) {
352 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
353 if_name(ifp0), if_name(altifp)));
357 /* next, try to get it from some other hardware interface */
358 TAILQ_FOREACH(ifp, &ifnet, if_list) {
361 if (get_hw_ifid(ifp, in6) != 0)
365 * to borrow ifid from other interface, ifid needs to be
368 if (IFID_UNIVERSAL(in6)) {
370 "%s: borrow interface identifier from %s\n",
371 if_name(ifp0), if_name(ifp)));
376 /* last resort: get from random number source */
377 if (get_rand_ifid(ifp, in6) == 0) {
379 "%s: interface identifier generated by random number\n",
384 kprintf("%s: failed to get interface identifier\n", if_name(ifp0));
388 nd6log((LOG_INFO, "%s: ifid: "
389 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
391 in6->s6_addr[8], in6->s6_addr[9],
392 in6->s6_addr[10], in6->s6_addr[11],
393 in6->s6_addr[12], in6->s6_addr[13],
394 in6->s6_addr[14], in6->s6_addr[15]));
399 in6_ifattach_linklocal(struct ifnet *ifp,
400 struct ifnet *altifp) /* secondary EUI64 source */
402 struct in6_ifaddr *ia;
403 struct in6_aliasreq ifra;
404 struct nd_prefix pr0;
408 * configure link-local address.
410 bzero(&ifra, sizeof(ifra));
413 * in6_update_ifa() does not use ifra_name, but we accurately set it
416 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
418 ifra.ifra_addr.sin6_family = AF_INET6;
419 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
420 ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
421 ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */
422 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
423 if (ifp->if_flags & IFF_LOOPBACK) {
424 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
425 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
427 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
429 "%s: no ifid available\n", if_name(ifp)));
434 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
435 ifra.ifra_prefixmask.sin6_family = AF_INET6;
436 ifra.ifra_prefixmask.sin6_addr = in6mask64;
438 /* link-local addresses should NEVER expire. */
439 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
440 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
443 * Do not let in6_update_ifa() do DAD, since we need a random delay
444 * before sending an NS at the first time the interface becomes up.
445 * Instead, in6_if_up() will start DAD with a proper random delay.
447 ifra.ifra_flags |= IN6_IFF_NODAD;
450 * Now call in6_update_ifa() to do a bunch of procedures to configure
451 * a link-local address. We can set NULL to the 3rd argument, because
452 * we know there's no other link-local address on the interface
453 * and therefore we are adding one (instead of updating one).
455 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
457 * XXX: When the interface does not support IPv6, this call
458 * would fail in the SIOCSIFADDR ioctl. I believe the
459 * notification is rather confusing in this case, so just
460 * supress it. (jinmei@kame.net 20010130)
462 if (error != EAFNOSUPPORT)
463 log(LOG_NOTICE, "in6_ifattach_linklocal: failed to "
464 "configure a link-local address on %s "
466 if_name(ifp), error);
471 * Adjust ia6_flags so that in6_if_up will perform DAD.
472 * XXX: Some P2P interfaces seem not to send packets just after
473 * becoming up, so we skip p2p interfaces for safety.
475 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
478 panic("ia == NULL in in6_ifattach_linklocal");
482 if (in6if_do_dad(ifp) && !(ifp->if_flags & IFF_POINTOPOINT)) {
483 ia->ia6_flags &= ~IN6_IFF_NODAD;
484 ia->ia6_flags |= IN6_IFF_TENTATIVE;
488 * Make the link-local prefix (fe80::/64%link) as on-link.
489 * Since we'd like to manage prefixes separately from addresses,
490 * we make an ND6 prefix structure for the link-local prefix,
491 * and add it to the prefix list as a never-expire prefix.
492 * XXX: this change might affect some existing code base...
494 bzero(&pr0, sizeof(pr0));
496 /* this should be 64 at this moment. */
497 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
498 pr0.ndpr_mask = ifra.ifra_prefixmask.sin6_addr;
499 pr0.ndpr_prefix = ifra.ifra_addr;
500 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
501 for (i = 0; i < 4; i++) {
502 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
503 in6mask64.s6_addr32[i];
506 * Initialize parameters. The link-local prefix must always be
507 * on-link, and its lifetimes never expire.
509 pr0.ndpr_raf_onlink = 1;
510 pr0.ndpr_raf_auto = 1; /* probably meaningless */
511 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
512 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
514 * Since there is no other link-local addresses, nd6_prefix_lookup()
515 * probably returns NULL. However, we cannot always expect the result.
516 * For example, if we first remove the (only) existing link-local
517 * address, and then reconfigure another one, the prefix is still
518 * valid with referring to the old link-local address.
520 if (nd6_prefix_lookup(&pr0) == NULL) {
521 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
529 in6_ifattach_loopback(struct ifnet *ifp) /* must be IFT_LOOP */
531 struct in6_aliasreq ifra;
534 bzero(&ifra, sizeof(ifra));
537 * in6_update_ifa() does not use ifra_name, but we accurately set it
540 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
542 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
543 ifra.ifra_prefixmask.sin6_family = AF_INET6;
544 ifra.ifra_prefixmask.sin6_addr = in6mask128;
547 * Always initialize ia_dstaddr (= broadcast address) to loopback
548 * address. Follows IPv4 practice - see in_ifinit().
550 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
551 ifra.ifra_dstaddr.sin6_family = AF_INET6;
552 ifra.ifra_dstaddr.sin6_addr = kin6addr_loopback;
554 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
555 ifra.ifra_addr.sin6_family = AF_INET6;
556 ifra.ifra_addr.sin6_addr = kin6addr_loopback;
558 /* the loopback address should NEVER expire. */
559 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
560 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
562 /* we don't need to perform DAD on loopback interfaces. */
563 ifra.ifra_flags |= IN6_IFF_NODAD;
565 /* skip registration to the prefix list. XXX should be temporary. */
566 ifra.ifra_flags |= IN6_IFF_NOPFX;
569 * We are sure that this is a newly assigned address, so we can set
570 * NULL to the 3rd arg.
572 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
573 log(LOG_ERR, "in6_ifattach_loopback: failed to configure "
574 "the loopback address on %s (errno=%d)\n",
575 if_name(ifp), error);
583 * compute NI group address, based on the current hostname setting.
584 * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
586 * when ifp == NULL, the caller is responsible for filling scopeid.
589 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
590 struct in6_addr *in6)
597 char n[64]; /* a single label must not exceed 63 chars */
599 if (!namelen || !name)
603 while (p && *p && *p != '.' && p - name < namelen)
605 if (p - name > sizeof(n) - 1)
606 return -1; /* label too long */
610 for (q = n; *q; q++) {
611 if ('A' <= *q && *q <= 'Z')
615 /* generate 8 bytes of pseudo-random value. */
616 bzero(&ctxt, sizeof(ctxt));
618 MD5Update(&ctxt, &l, sizeof(l));
619 MD5Update(&ctxt, n, l);
620 MD5Final(digest, &ctxt);
622 bzero(in6, sizeof(*in6));
623 in6->s6_addr16[0] = htons(0xff02);
625 in6->s6_addr16[1] = htons(ifp->if_index);
626 in6->s6_addr8[11] = 2;
627 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
633 in6_nigroup_attach(const char *name, int namelen)
636 struct sockaddr_in6 mltaddr;
637 struct in6_multi *in6m;
640 bzero(&mltaddr, sizeof(mltaddr));
641 mltaddr.sin6_family = AF_INET6;
642 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
643 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
646 TAILQ_FOREACH(ifp, &ifnet, if_list) {
647 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
648 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
650 if (!in6_addmulti(&mltaddr.sin6_addr, ifp, &error)) {
651 nd6log((LOG_ERR, "%s: failed to join %s "
652 "(errno=%d)\n", if_name(ifp),
653 ip6_sprintf(&mltaddr.sin6_addr),
661 in6_nigroup_detach(const char *name, int namelen)
664 struct sockaddr_in6 mltaddr;
665 struct in6_multi *in6m;
667 bzero(&mltaddr, sizeof(mltaddr));
668 mltaddr.sin6_family = AF_INET6;
669 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
670 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
673 TAILQ_FOREACH(ifp, &ifnet, if_list) {
674 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
675 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
682 * XXX multiple loopback interface needs more care. for instance,
683 * nodelocal address needs to be configured onto only one of them.
684 * XXX multiple link-local address case
687 in6_ifattach(struct ifnet *ifp,
688 struct ifnet *altifp) /* secondary EUI64 source */
690 struct in6_ifaddr *ia;
693 /* some of the interfaces are inherently not IPv6 capable */
694 switch (ifp->if_type) {
695 #ifdef IFT_BRIDGE /*OpenBSD 2.8*/
706 * quirks based on interface type
708 switch (ifp->if_type) {
712 * 6to4 interface is a very special kind of beast.
713 * no multicast, no linklocal. RFC2529 specifies how to make
714 * linklocals for 6to4 interface, but there's no use and
715 * it is rather harmful to have one.
724 * usually, we require multicast capability to the interface
726 if (!(ifp->if_flags & IFF_MULTICAST)) {
727 log(LOG_INFO, "in6_ifattach: "
728 "%s is not multicast capable, IPv6 not enabled\n",
734 * assign loopback address for loopback interface.
735 * XXX multiple loopback interface case.
737 if (ifp->if_flags & IFF_LOOPBACK) {
738 in6 = kin6addr_loopback;
739 if (in6ifa_ifpwithaddr(ifp, &in6) == NULL) {
740 if (in6_ifattach_loopback(ifp) != 0)
746 * assign a link-local address, if there's none.
748 if (ip6_auto_linklocal) {
749 ia = in6ifa_ifpforlinklocal(ifp, 0);
751 if (in6_ifattach_linklocal(ifp, altifp) == 0) {
752 /* linklocal address assigned */
754 /* failed to assign linklocal address. bark? */
759 #ifdef IFT_STF /* XXX */
763 /* update dynamically. */
764 if (in6_maxmtu < ifp->if_mtu)
765 in6_maxmtu = ifp->if_mtu;
769 * NOTE: in6_ifdetach() does not support loopback if at this moment.
770 * We don't need this function in bsdi, because interfaces are never removed
771 * from the ifnet list in bsdi.
774 in6_ifdetach(struct ifnet *ifp)
776 struct in6_ifaddr *ia, *oia;
777 struct ifaddr_container *ifac, *next;
780 struct sockaddr_in6 sin6;
781 struct in6_multi *in6m;
782 struct in6_multi *in6m_next;
784 /* nuke prefix list. this may try to remove some of ifaddrs as well */
785 in6_purgeprefix(ifp);
787 /* remove neighbor management table */
790 /* nuke any of IPv6 addresses we have */
791 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], ifa_link, next) {
792 struct ifaddr *ifa = ifac->ifa;
794 if (ifa->ifa_addr->sa_family != AF_INET6)
799 /* undo everything done by in6_ifattach(), just in case */
800 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], ifa_link, next) {
801 struct ifaddr *ifa = ifac->ifa;
803 if (ifa->ifa_addr->sa_family != AF_INET6
804 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
808 ia = (struct in6_ifaddr *)ifa;
810 /* remove from the routing table */
811 if ((ia->ia_flags & IFA_ROUTE) &&
812 (rt = rtpurelookup((struct sockaddr *)&ia->ia_addr))) {
813 rtflags = rt->rt_flags;
815 rtrequest(RTM_DELETE,
816 (struct sockaddr *)&ia->ia_addr,
817 (struct sockaddr *)&ia->ia_addr,
818 (struct sockaddr *)&ia->ia_prefixmask,
822 /* remove from the linked list */
823 ifa_ifunlink((struct ifaddr *)ia, ifp);
825 /* also remove from the IPv6 address chain(itojun&jinmei) */
827 if (oia == (ia = in6_ifaddr))
828 in6_ifaddr = ia->ia_next;
830 while (ia->ia_next && (ia->ia_next != oia))
833 ia->ia_next = oia->ia_next;
836 "%s: didn't unlink in6ifaddr from "
837 "list\n", if_name(ifp)));
841 crit_enter(); /* XXX MP not MP safe */
842 _IFAFREE(&oia->ia_ifa, 0);
845 ifa_destroy(&ia->ia_ifa);
848 /* leave from all multicast groups joined */
850 in6_pcbpurgeif0(LIST_FIRST(&udbinfo.pcblisthead), ifp);
853 in6_pcbpurgeif0(LIST_FIRST(&ripcbinfo.pcblisthead), ifp);
854 for (in6m = LIST_FIRST(&in6_multihead); in6m; in6m = in6m_next) {
855 in6m_next = LIST_NEXT(in6m, in6m_entry);
856 if (in6m->in6m_ifp != ifp)
863 * remove neighbor management table. we call it twice just to make
864 * sure we nuke everything. maybe we need just one call.
865 * XXX: since the first call did not release addresses, some prefixes
866 * might remain. We should call nd6_purge() again to release the
867 * prefixes after removing all addresses above.
868 * (Or can we just delay calling nd6_purge until at this point?)
872 /* remove route to link-local allnodes multicast (ff02::1) */
873 bzero(&sin6, sizeof(sin6));
874 sin6.sin6_len = sizeof(struct sockaddr_in6);
875 sin6.sin6_family = AF_INET6;
876 sin6.sin6_addr = kin6addr_linklocal_allnodes;
877 sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
878 rt = rtpurelookup((struct sockaddr *)&sin6);
879 if (rt != NULL && rt->rt_ifp == ifp) {
881 rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
882 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
887 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf, const u_int8_t *baseid,
891 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
893 bzero(nullbuf, sizeof(nullbuf));
894 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
895 /* we've never created a random ID. Create a new one. */
900 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
902 /* generate_tmp_ifid will update seedn and buf */
903 generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
906 bcopy(ndi->randomid, retbuf, 8);
910 in6_tmpaddrtimer(void *ignored_arg)
912 struct nd_ifinfo *ndi;
918 callout_reset(&in6_tmpaddrtimer_ch,
919 (ip6_temp_preferred_lifetime - ip6_desync_factor -
920 ip6_temp_regen_advance) * hz,
921 in6_tmpaddrtimer, NULL);
923 bzero(nullbuf, sizeof(nullbuf));
924 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) {
925 ndi = ND_IFINFO(ifp);
926 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
928 * We've been generating a random ID on this interface.
931 generate_tmp_ifid(ndi->randomseed0,