2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/socket.h>
39 #include <sys/sockio.h>
40 #include <sys/kernel.h>
41 #include <sys/syslog.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>
54 #include <netinet/ip6.h>
55 #include <netinet6/ip6_var.h>
56 #include <netinet6/in6_var.h>
57 #include <netinet6/in6_pcb.h>
58 #include <netinet6/in6_ifattach.h>
59 #include <netinet6/ip6_var.h>
60 #include <netinet6/nd6.h>
61 #include <netinet6/scope6_var.h>
63 unsigned long in6_maxmtu = 0;
65 #ifdef IP6_AUTO_LINKLOCAL
66 int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
68 int ip6_auto_linklocal = 1; /* enable by default */
71 struct callout in6_tmpaddrtimer_ch;
73 extern struct inpcbinfo udbinfo;
74 extern struct inpcbinfo ripcbinfo;
76 static int get_rand_ifid(struct ifnet *, struct in6_addr *);
77 static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *);
78 static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *);
79 static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *);
80 static int in6_ifattach_loopback(struct ifnet *);
81 static void in6_purgemaddrs(struct ifnet *);
83 #define EUI64_GBIT 0x01
84 #define EUI64_UBIT 0x02
85 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
86 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
87 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
88 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
89 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
91 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
92 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
95 * Generate a last-resort interface identifier, when the machine has no
96 * IEEE802/EUI64 address sources.
97 * The goal here is to get an interface identifier that is
98 * (1) random enough and (2) does not change across reboot.
99 * We currently use MD5(hostname) for it.
101 * in6 - upper 64bits are preserved
104 get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
108 int hostnamelen = strlen(hostname);
111 /* we need at least several letters as seed for ifid */
116 /* generate 8 bytes of pseudo-random value. */
117 bzero(&ctxt, sizeof(ctxt));
119 MD5Update(&ctxt, hostname, hostnamelen);
120 MD5Final(digest, &ctxt);
122 /* assumes sizeof(digest) > sizeof(ifid) */
123 bcopy(digest, &in6->s6_addr[8], 8);
125 /* make sure to set "u" bit to local, and "g" bit to individual. */
126 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
127 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
129 /* convert EUI64 into IPv6 interface identifier */
136 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
139 u_int8_t seed[16], digest[16], nullbuf[8];
142 /* If there's no history, start with a random seed. */
143 bzero(nullbuf, sizeof(nullbuf));
144 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
147 for (i = 0; i < 2; i++) {
148 val32 = arc4random();
149 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
152 bcopy(seed0, seed, 8);
154 /* copy the right-most 64-bits of the given address */
155 /* XXX assumption on the size of IFID */
156 bcopy(seed1, &seed[8], 8);
158 if (0) { /* for debugging purposes only */
161 printf("generate_tmp_ifid: new randomized ID from: ");
162 for (i = 0; i < 16; i++)
163 printf("%02x", seed[i]);
167 /* generate 16 bytes of pseudo-random value. */
168 bzero(&ctxt, sizeof(ctxt));
170 MD5Update(&ctxt, seed, sizeof(seed));
171 MD5Final(digest, &ctxt);
174 * RFC 3041 3.2.1. (3)
175 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
176 * left-most bit is numbered 0) to zero.
178 bcopy(digest, ret, 8);
179 ret[0] &= ~EUI64_UBIT;
182 * XXX: we'd like to ensure that the generated value is not zero
183 * for simplicity. If the caclculated digest happens to be zero,
184 * use a random non-zero value as the last resort.
186 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
188 "generate_tmp_ifid: computed MD5 value is zero.\n"));
190 val32 = arc4random();
191 val32 = 1 + (val32 % (0xffffffff - 1));
195 * RFC 3041 3.2.1. (4)
196 * Take the rightmost 64-bits of the MD5 digest and save them in
197 * stable storage as the history value to be used in the next
198 * iteration of the algorithm.
200 bcopy(&digest[8], seed0, 8);
202 if (0) { /* for debugging purposes only */
206 for (i = 0; i < 16; i++)
207 printf("%02x", digest[i]);
215 * Get interface identifier for the specified interface.
216 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
218 * in6 - upper 64bits are preserved
221 in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
224 struct sockaddr_dl *sdl;
227 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
228 static u_int8_t allone[8] =
229 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
231 for (ifa = ifp->if_addrlist.tqh_first;
233 ifa = ifa->ifa_list.tqe_next) {
234 if (ifa->ifa_addr->sa_family != AF_LINK)
236 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
239 if (sdl->sdl_alen == 0)
249 addrlen = sdl->sdl_alen;
252 switch (ifp->if_type) {
261 /* IEEE802/EUI64 cases - what others? */
262 /* IEEE1394 uses 16byte length address starting with EUI64 */
266 /* look at IEEE802/EUI64 only */
267 if (addrlen != 8 && addrlen != 6)
271 * check for invalid MAC address - on bsdi, we see it a lot
272 * since wildboar configures all-zero MAC on pccard before
275 if (bcmp(addr, allzero, addrlen) == 0)
277 if (bcmp(addr, allone, addrlen) == 0)
280 /* make EUI64 address */
282 bcopy(addr, &in6->s6_addr[8], 8);
283 else if (addrlen == 6) {
284 in6->s6_addr[8] = addr[0];
285 in6->s6_addr[9] = addr[1];
286 in6->s6_addr[10] = addr[2];
287 in6->s6_addr[11] = 0xff;
288 in6->s6_addr[12] = 0xfe;
289 in6->s6_addr[13] = addr[3];
290 in6->s6_addr[14] = addr[4];
291 in6->s6_addr[15] = addr[5];
301 bzero(&in6->s6_addr[8], 8);
302 in6->s6_addr[15] = addr[0];
305 * due to insufficient bitwidth, we mark it local.
307 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
308 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
316 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
317 * however, IPv4 address is not very suitable as unique
318 * identifier source (can be renumbered).
327 /* sanity check: g bit must not indicate "group" */
328 if (EUI64_GROUP(in6))
331 /* convert EUI64 into IPv6 interface identifier */
335 * sanity check: ifid must not be all zero, avoid conflict with
336 * subnet router anycast
338 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
339 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
347 * Get interface identifier for the specified interface. If it is not
348 * available on ifp0, borrow interface identifier from other information
351 * altifp - secondary EUI64 source
354 get_ifid(struct ifnet *ifp0, struct ifnet *altifp,
355 struct in6_addr *in6)
359 /* first, try to get it from the interface itself */
360 if (in6_get_hw_ifid(ifp0, in6) == 0) {
361 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
366 /* try secondary EUI64 source. this basically is for ATM PVC */
367 if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
368 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
369 if_name(ifp0), if_name(altifp)));
373 /* next, try to get it from some other hardware interface */
375 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next) {
378 if (in6_get_hw_ifid(ifp, in6) != 0)
382 * to borrow ifid from other interface, ifid needs to be
385 if (IFID_UNIVERSAL(in6)) {
387 "%s: borrow interface identifier from %s\n",
388 if_name(ifp0), if_name(ifp)));
395 /* last resort: get from random number source */
396 if (get_rand_ifid(ifp, in6) == 0) {
398 "%s: interface identifier generated by random number\n",
403 printf("%s: failed to get interface identifier\n", if_name(ifp0));
407 nd6log((LOG_INFO, "%s: ifid: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
408 if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
409 in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
410 in6->s6_addr[14], in6->s6_addr[15]));
415 * altifp - secondary EUI64 source
418 in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet *altifp)
420 struct in6_ifaddr *ia;
421 struct in6_aliasreq ifra;
422 struct nd_prefixctl pr0;
426 * configure link-local address.
428 bzero(&ifra, sizeof(ifra));
431 * in6_update_ifa() does not use ifra_name, but we accurately set it
434 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
436 ifra.ifra_addr.sin6_family = AF_INET6;
437 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
438 ifra.ifra_addr.sin6_addr.s6_addr32[0] = htonl(0xfe800000);
439 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
440 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
441 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
442 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
444 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
446 "%s: no ifid available\n", if_name(ifp)));
450 if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
453 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
454 ifra.ifra_prefixmask.sin6_family = AF_INET6;
455 ifra.ifra_prefixmask.sin6_addr = in6mask64;
456 /* link-local addresses should NEVER expire. */
457 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
458 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
461 * Now call in6_update_ifa() to do a bunch of procedures to configure
462 * a link-local address. We can set the 3rd argument to NULL, because
463 * we know there's no other link-local address on the interface
464 * and therefore we are adding one (instead of updating one).
466 if ((error = in6_update_ifa(ifp, &ifra, NULL,
467 IN6_IFAUPDATE_DADDELAY)) != 0) {
469 * XXX: When the interface does not support IPv6, this call
470 * would fail in the SIOCSIFADDR ioctl. I believe the
471 * notification is rather confusing in this case, so just
472 * suppress it. (jinmei@kame.net 20010130)
474 if (error != EAFNOSUPPORT)
475 nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
476 "configure a link-local address on %s "
478 if_name(ifp), error));
482 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
485 panic("ia == NULL in in6_ifattach_linklocal");
491 * Make the link-local prefix (fe80::%link/64) as on-link.
492 * Since we'd like to manage prefixes separately from addresses,
493 * we make an ND6 prefix structure for the link-local prefix,
494 * and add it to the prefix list as a never-expire prefix.
495 * XXX: this change might affect some existing code base...
497 bzero(&pr0, sizeof(pr0));
499 /* this should be 64 at this moment. */
500 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
501 pr0.ndpr_prefix = ifra.ifra_addr;
502 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
503 for (i = 0; i < 4; i++) {
504 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
505 in6mask64.s6_addr32[i];
508 * Initialize parameters. The link-local prefix must always be
509 * on-link, and its lifetimes never expire.
511 pr0.ndpr_raf_onlink = 1;
512 pr0.ndpr_raf_auto = 1; /* probably meaningless */
513 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
514 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
516 * Since there is no other link-local addresses, nd6_prefix_lookup()
517 * probably returns NULL. However, we cannot always expect the result.
518 * For example, if we first remove the (only) existing link-local
519 * address, and then reconfigure another one, the prefix is still
520 * valid with referring to the old link-local address.
522 if (nd6_prefix_lookup(&pr0) == NULL) {
523 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
531 * ifp - must be IFT_LOOP
534 in6_ifattach_loopback(struct ifnet *ifp)
536 struct in6_aliasreq ifra;
539 bzero(&ifra, sizeof(ifra));
542 * in6_update_ifa() does not use ifra_name, but we accurately set it
545 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
547 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
548 ifra.ifra_prefixmask.sin6_family = AF_INET6;
549 ifra.ifra_prefixmask.sin6_addr = in6mask128;
552 * Always initialize ia_dstaddr (= broadcast address) to loopback
553 * address. Follows IPv4 practice - see in_ifinit().
555 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
556 ifra.ifra_dstaddr.sin6_family = AF_INET6;
557 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
559 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
560 ifra.ifra_addr.sin6_family = AF_INET6;
561 ifra.ifra_addr.sin6_addr = in6addr_loopback;
563 /* the loopback address should NEVER expire. */
564 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
565 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
567 /* we don't need to perform DAD on loopback interfaces. */
568 ifra.ifra_flags |= IN6_IFF_NODAD;
570 /* skip registration to the prefix list. XXX should be temporary. */
571 ifra.ifra_flags |= IN6_IFF_NOPFX;
574 * We are sure that this is a newly assigned address, so we can set
575 * NULL to the 3rd arg.
577 if ((error = in6_update_ifa(ifp, &ifra, NULL, 0)) != 0) {
578 nd6log((LOG_ERR, "in6_ifattach_loopback: failed to configure "
579 "the loopback address on %s (errno=%d)\n",
580 if_name(ifp), error));
588 * compute NI group address, based on the current hostname setting.
589 * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
591 * when ifp == NULL, the caller is responsible for filling scopeid.
594 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
595 struct in6_addr *in6)
602 char n[64]; /* a single label must not exceed 63 chars */
604 if (!namelen || !name)
608 while (p && *p && *p != '.' && p - name < namelen)
610 if (p - name > sizeof(n) - 1)
611 return -1; /* label too long */
615 for (q = n; *q; q++) {
616 if ('A' <= *q && *q <= 'Z')
620 /* generate 8 bytes of pseudo-random value. */
621 bzero(&ctxt, sizeof(ctxt));
623 MD5Update(&ctxt, &l, sizeof(l));
624 MD5Update(&ctxt, n, l);
625 MD5Final(digest, &ctxt);
627 bzero(in6, sizeof(*in6));
628 in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
629 in6->s6_addr8[11] = 2;
630 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
631 if (in6_setscope(in6, ifp, NULL))
632 return (-1); /* XXX: should not fail */
638 * XXX multiple loopback interface needs more care. for instance,
639 * nodelocal address needs to be configured onto only one of them.
640 * XXX multiple link-local address case
642 * altifp - secondary EUI64 source
645 in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
647 struct in6_ifaddr *ia;
650 /* some of the interfaces are inherently not IPv6 capable */
651 switch (ifp->if_type) {
659 * quirks based on interface type
661 switch (ifp->if_type) {
665 * 6to4 interface is a very special kind of beast.
666 * no multicast, no linklocal. RFC2529 specifies how to make
667 * linklocals for 6to4 interface, but there's no use and
668 * it is rather harmful to have one.
677 * usually, we require multicast capability to the interface
679 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
680 nd6log((LOG_INFO, "in6_ifattach: "
681 "%s is not multicast capable, IPv6 not enabled\n",
687 * assign loopback address for loopback interface.
688 * XXX multiple loopback interface case.
690 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
691 in6 = in6addr_loopback;
692 if (in6ifa_ifpwithaddr(ifp, &in6) == NULL) {
693 if (in6_ifattach_loopback(ifp) != 0)
699 * assign a link-local address, if there's none.
701 if (ip6_auto_linklocal && ifp->if_type != IFT_BRIDGE) {
702 ia = in6ifa_ifpforlinklocal(ifp, 0);
704 if (in6_ifattach_linklocal(ifp, altifp) == 0) {
705 /* linklocal address assigned */
707 /* failed to assign linklocal address. bark? */
712 #ifdef IFT_STF /* XXX */
716 /* update dynamically. */
717 if (in6_maxmtu < ifp->if_mtu)
718 in6_maxmtu = ifp->if_mtu;
722 * NOTE: in6_ifdetach() does not support loopback if at this moment.
723 * We don't need this function in bsdi, because interfaces are never removed
724 * from the ifnet list in bsdi.
727 in6_ifdetach(struct ifnet *ifp)
729 struct in6_ifaddr *ia, *oia;
730 struct ifaddr *ifa, *next;
733 struct sockaddr_in6 sin6;
734 struct in6_multi_mship *imm;
736 /* remove neighbor management table */
739 /* nuke any of IPv6 addresses we have */
740 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next) {
741 next = ifa->ifa_list.tqe_next;
742 if (ifa->ifa_addr->sa_family != AF_INET6)
747 /* undo everything done by in6_ifattach(), just in case */
748 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next) {
749 next = ifa->ifa_list.tqe_next;
751 if (ifa->ifa_addr->sa_family != AF_INET6
752 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
756 ia = (struct in6_ifaddr *)ifa;
759 * leave from multicast groups we have joined for the interface
761 while ((imm = ia->ia6_memberships.lh_first) != NULL) {
762 LIST_REMOVE(imm, i6mm_chain);
766 /* remove from the routing table */
767 if ((ia->ia_flags & IFA_ROUTE) &&
768 (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0UL))) {
769 rtflags = rt->rt_flags;
771 rtrequest(RTM_DELETE, (struct sockaddr *)&ia->ia_addr,
772 (struct sockaddr *)&ia->ia_addr,
773 (struct sockaddr *)&ia->ia_prefixmask,
774 rtflags, (struct rtentry **)0);
777 /* remove from the linked list */
778 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
779 IFAFREE(&ia->ia_ifa);
781 /* also remove from the IPv6 address chain(itojun&jinmei) */
783 if (oia == (ia = in6_ifaddr))
784 in6_ifaddr = ia->ia_next;
786 while (ia->ia_next && (ia->ia_next != oia))
789 ia->ia_next = oia->ia_next;
792 "%s: didn't unlink in6ifaddr from list\n",
797 IFAFREE(&oia->ia_ifa);
800 in6_pcbpurgeif0(&udbinfo, ifp);
801 in6_pcbpurgeif0(&ripcbinfo, ifp);
802 /* leave from all multicast groups joined */
803 in6_purgemaddrs(ifp);
806 * remove neighbor management table. we call it twice just to make
807 * sure we nuke everything. maybe we need just one call.
808 * XXX: since the first call did not release addresses, some prefixes
809 * might remain. We should call nd6_purge() again to release the
810 * prefixes after removing all addresses above.
811 * (Or can we just delay calling nd6_purge until at this point?)
815 /* remove route to link-local allnodes multicast (ff02::1) */
816 bzero(&sin6, sizeof(sin6));
817 sin6.sin6_len = sizeof(struct sockaddr_in6);
818 sin6.sin6_family = AF_INET6;
819 sin6.sin6_addr = in6addr_linklocal_allnodes;
820 if (in6_setscope(&sin6.sin6_addr, ifp, NULL))
821 /* XXX: should not fail */
823 /* XXX grab lock first to avoid LOR */
824 if (rt_tables[0][AF_INET6] != NULL) {
825 RADIX_NODE_HEAD_LOCK(rt_tables[0][AF_INET6]);
826 rt = rtalloc1((struct sockaddr *)&sin6, 0, RTF_RNH_LOCKED);
828 if (rt->rt_ifp == ifp)
832 RADIX_NODE_HEAD_UNLOCK(rt_tables[0][AF_INET6]);
837 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf,
838 const u_int8_t *baseid, int generate)
841 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
843 bzero(nullbuf, sizeof(nullbuf));
844 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
845 /* we've never created a random ID. Create a new one. */
850 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
852 /* generate_tmp_ifid will update seedn and buf */
853 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
856 bcopy(ndi->randomid, retbuf, 8);
862 in6_tmpaddrtimer(void *ignored_arg)
864 struct nd_ifinfo *ndi;
869 callout_reset(&in6_tmpaddrtimer_ch,
870 (ip6_temp_preferred_lifetime - ip6_desync_factor -
871 ip6_temp_regen_advance) * hz, in6_tmpaddrtimer, NULL);
873 bzero(nullbuf, sizeof(nullbuf));
874 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) {
875 ndi = ND_IFINFO(ifp);
876 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
878 * We've been generating a random ID on this interface.
881 (void)generate_tmp_ifid(ndi->randomseed0,
882 ndi->randomseed1, ndi->randomid);
890 in6_purgemaddrs(struct ifnet *ifp)
892 struct in6_multi *in6m;
893 struct in6_multi *oin6m;
896 printf("%s: purging ifp %p\n", __func__, ifp);
900 LIST_FOREACH_SAFE(in6m, &in6_multihead, in6m_entry, oin6m) {
901 if (in6m->in6m_ifp == ifp)
904 IFF_UNLOCKGIANT(ifp);