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 1.2 2003/06/17 04:28:52 dillon 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>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <net/route.h>
48 #include <netinet/in.h>
49 #include <netinet/in_var.h>
50 #include <netinet/if_ether.h>
51 #include <netinet/in_pcb.h>
53 #include <netinet/ip6.h>
54 #include <netinet6/ip6_var.h>
55 #include <netinet6/in6_var.h>
56 #include <netinet6/in6_pcb.h>
57 #include <netinet6/in6_ifattach.h>
58 #include <netinet6/ip6_var.h>
59 #include <netinet6/nd6.h>
60 #include <netinet6/scope6_var.h>
62 #include <net/net_osdep.h>
64 struct in6_ifstat **in6_ifstat = NULL;
65 struct icmp6_ifstat **icmp6_ifstat = NULL;
66 size_t in6_ifstatmax = 0;
67 size_t icmp6_ifstatmax = 0;
68 unsigned long in6_maxmtu = 0;
70 #ifdef IP6_AUTO_LINKLOCAL
71 int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
73 int ip6_auto_linklocal = 1; /* enable by default */
76 struct callout in6_tmpaddrtimer_ch;
78 extern struct inpcbinfo udbinfo;
79 extern struct inpcbinfo ripcbinfo;
81 static int get_rand_ifid __P((struct ifnet *, struct in6_addr *));
82 static int generate_tmp_ifid __P((u_int8_t *, const u_int8_t *, u_int8_t *));
83 static int get_hw_ifid __P((struct ifnet *, struct in6_addr *));
84 static int get_ifid __P((struct ifnet *, struct ifnet *, struct in6_addr *));
85 static int in6_ifattach_linklocal __P((struct ifnet *, struct ifnet *));
86 static int in6_ifattach_loopback __P((struct ifnet *));
88 #define EUI64_GBIT 0x01
89 #define EUI64_UBIT 0x02
90 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
91 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
92 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
93 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
94 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
96 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
97 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
100 * Generate a last-resort interface identifier, when the machine has no
101 * IEEE802/EUI64 address sources.
102 * The goal here is to get an interface identifier that is
103 * (1) random enough and (2) does not change across reboot.
104 * We currently use MD5(hostname) for it.
107 get_rand_ifid(ifp, in6)
109 struct in6_addr *in6; /* upper 64bits are preserved */
113 int hostnamelen = strlen(hostname);
116 /* we need at least several letters as seed for ifid */
121 /* generate 8 bytes of pseudo-random value. */
122 bzero(&ctxt, sizeof(ctxt));
124 MD5Update(&ctxt, hostname, hostnamelen);
125 MD5Final(digest, &ctxt);
127 /* assumes sizeof(digest) > sizeof(ifid) */
128 bcopy(digest, &in6->s6_addr[8], 8);
130 /* make sure to set "u" bit to local, and "g" bit to individual. */
131 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
132 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
134 /* convert EUI64 into IPv6 interface identifier */
141 generate_tmp_ifid(seed0, seed1, ret)
142 u_int8_t *seed0, *ret;
143 const u_int8_t *seed1;
146 u_int8_t seed[16], digest[16], nullbuf[8];
150 /* If there's no hisotry, start with a random seed. */
151 bzero(nullbuf, sizeof(nullbuf));
152 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
155 for (i = 0; i < 2; i++) {
157 val32 = random() ^ tv.tv_usec;
158 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
161 bcopy(seed0, seed, 8);
164 /* copy the right-most 64-bits of the given address */
165 /* XXX assumption on the size of IFID */
166 bcopy(seed1, &seed[8], 8);
168 if (0) { /* for debugging purposes only */
171 printf("generate_tmp_ifid: new randomized ID from: ");
172 for (i = 0; i < 16; i++)
173 printf("%02x", seed[i]);
177 /* generate 16 bytes of pseudo-random value. */
178 bzero(&ctxt, sizeof(ctxt));
180 MD5Update(&ctxt, seed, sizeof(seed));
181 MD5Final(digest, &ctxt);
184 * RFC 3041 3.2.1. (3)
185 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
186 * left-most bit is numbered 0) to zero.
188 bcopy(digest, ret, 8);
189 ret[0] &= ~EUI64_UBIT;
192 * XXX: we'd like to ensure that the generated value is not zero
193 * for simplicity. If the caclculated digest happens to be zero,
194 * use a random non-zero value as the last resort.
196 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
198 "generate_tmp_ifid: computed MD5 value is zero.\n");
201 val32 = random() ^ tv.tv_usec;
202 val32 = 1 + (val32 % (0xffffffff - 1));
206 * RFC 3041 3.2.1. (4)
207 * Take the rightmost 64-bits of the MD5 digest and save them in
208 * stable storage as the history value to be used in the next
209 * iteration of the algorithm.
211 bcopy(&digest[8], seed0, 8);
213 if (0) { /* for debugging purposes only */
217 for (i = 0; i < 16; i++)
218 printf("%02x", digest[i]);
226 * Get interface identifier for the specified interface.
227 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
230 get_hw_ifid(ifp, in6)
232 struct in6_addr *in6; /* upper 64bits are preserved */
235 struct sockaddr_dl *sdl;
238 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
239 static u_int8_t allone[8] =
240 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
242 for (ifa = ifp->if_addrlist.tqh_first;
244 ifa = ifa->ifa_list.tqe_next)
246 if (ifa->ifa_addr->sa_family != AF_LINK)
248 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
251 if (sdl->sdl_alen == 0)
261 addrlen = sdl->sdl_alen;
264 switch (ifp->if_type) {
272 /* IEEE802/EUI64 cases - what others? */
273 /* IEEE1394 uses 16byte length address starting with EUI64 */
277 /* look at IEEE802/EUI64 only */
278 if (addrlen != 8 && addrlen != 6)
282 * check for invalid MAC address - on bsdi, we see it a lot
283 * since wildboar configures all-zero MAC on pccard before
286 if (bcmp(addr, allzero, addrlen) == 0)
288 if (bcmp(addr, allone, addrlen) == 0)
291 /* make EUI64 address */
293 bcopy(addr, &in6->s6_addr[8], 8);
294 else if (addrlen == 6) {
295 in6->s6_addr[8] = addr[0];
296 in6->s6_addr[9] = addr[1];
297 in6->s6_addr[10] = addr[2];
298 in6->s6_addr[11] = 0xff;
299 in6->s6_addr[12] = 0xfe;
300 in6->s6_addr[13] = addr[3];
301 in6->s6_addr[14] = addr[4];
302 in6->s6_addr[15] = addr[5];
312 bzero(&in6->s6_addr[8], 8);
313 in6->s6_addr[15] = addr[0];
316 * due to insufficient bitwidth, we mark it local.
318 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
319 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
327 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
328 * however, IPv4 address is not very suitable as unique
329 * identifier source (can be renumbered).
338 /* sanity check: g bit must not indicate "group" */
339 if (EUI64_GROUP(in6))
342 /* convert EUI64 into IPv6 interface identifier */
346 * sanity check: ifid must not be all zero, avoid conflict with
347 * subnet router anycast
349 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
350 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
358 * Get interface identifier for the specified interface. If it is not
359 * available on ifp0, borrow interface identifier from other information
363 get_ifid(ifp0, altifp, in6)
365 struct ifnet *altifp; /* secondary EUI64 source */
366 struct in6_addr *in6;
370 /* first, try to get it from the interface itself */
371 if (get_hw_ifid(ifp0, in6) == 0) {
372 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
377 /* try secondary EUI64 source. this basically is for ATM PVC */
378 if (altifp && get_hw_ifid(altifp, in6) == 0) {
379 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
380 if_name(ifp0), if_name(altifp)));
384 /* next, try to get it from some other hardware interface */
385 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
389 if (get_hw_ifid(ifp, in6) != 0)
393 * to borrow ifid from other interface, ifid needs to be
396 if (IFID_UNIVERSAL(in6)) {
398 "%s: borrow interface identifier from %s\n",
399 if_name(ifp0), if_name(ifp)));
404 /* last resort: get from random number source */
405 if (get_rand_ifid(ifp, in6) == 0) {
407 "%s: interface identifier generated by random number\n",
412 printf("%s: failed to get interface identifier\n", if_name(ifp0));
416 nd6log((LOG_INFO, "%s: ifid: "
417 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
419 in6->s6_addr[8], in6->s6_addr[9],
420 in6->s6_addr[10], in6->s6_addr[11],
421 in6->s6_addr[12], in6->s6_addr[13],
422 in6->s6_addr[14], in6->s6_addr[15]));
427 in6_ifattach_linklocal(ifp, altifp)
429 struct ifnet *altifp; /* secondary EUI64 source */
431 struct in6_ifaddr *ia;
432 struct in6_aliasreq ifra;
433 struct nd_prefix pr0;
437 * configure link-local address.
439 bzero(&ifra, sizeof(ifra));
442 * in6_update_ifa() does not use ifra_name, but we accurately set it
445 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
447 ifra.ifra_addr.sin6_family = AF_INET6;
448 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
449 ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
451 ifra.ifra_addr.sin6_addr.s6_addr16[1] = 0
453 ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */
455 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
456 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
457 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
458 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
460 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
462 "%s: no ifid available\n", if_name(ifp)));
467 ifra.ifra_addr.sin6_scope_id =
468 in6_addr2scopeid(ifp, &ifra.ifra_addr.sin6_addr);
471 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
472 ifra.ifra_prefixmask.sin6_family = AF_INET6;
473 ifra.ifra_prefixmask.sin6_addr = in6mask64;
475 /* take into accound the sin6_scope_id field for routing */
476 ifra.ifra_prefixmask.sin6_scope_id = 0xffffffff;
478 /* link-local addresses should NEVER expire. */
479 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
480 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
483 * Do not let in6_update_ifa() do DAD, since we need a random delay
484 * before sending an NS at the first time the interface becomes up.
485 * Instead, in6_if_up() will start DAD with a proper random delay.
487 ifra.ifra_flags |= IN6_IFF_NODAD;
490 * Now call in6_update_ifa() to do a bunch of procedures to configure
491 * a link-local address. We can set NULL to the 3rd argument, because
492 * we know there's no other link-local address on the interface
493 * and therefore we are adding one (instead of updating one).
495 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
497 * XXX: When the interface does not support IPv6, this call
498 * would fail in the SIOCSIFADDR ioctl. I believe the
499 * notification is rather confusing in this case, so just
500 * supress it. (jinmei@kame.net 20010130)
502 if (error != EAFNOSUPPORT)
503 log(LOG_NOTICE, "in6_ifattach_linklocal: failed to "
504 "configure a link-local address on %s "
506 if_name(ifp), error);
511 * Adjust ia6_flags so that in6_if_up will perform DAD.
512 * XXX: Some P2P interfaces seem not to send packets just after
513 * becoming up, so we skip p2p interfaces for safety.
515 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
518 panic("ia == NULL in in6_ifattach_linklocal");
522 if (in6if_do_dad(ifp) && (ifp->if_flags & IFF_POINTOPOINT) == 0) {
523 ia->ia6_flags &= ~IN6_IFF_NODAD;
524 ia->ia6_flags |= IN6_IFF_TENTATIVE;
528 * Make the link-local prefix (fe80::/64%link) as on-link.
529 * Since we'd like to manage prefixes separately from addresses,
530 * we make an ND6 prefix structure for the link-local prefix,
531 * and add it to the prefix list as a never-expire prefix.
532 * XXX: this change might affect some existing code base...
534 bzero(&pr0, sizeof(pr0));
536 /* this should be 64 at this moment. */
537 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
538 pr0.ndpr_mask = ifra.ifra_prefixmask.sin6_addr;
539 pr0.ndpr_prefix = ifra.ifra_addr;
540 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
541 for (i = 0; i < 4; i++) {
542 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
543 in6mask64.s6_addr32[i];
546 * Initialize parameters. The link-local prefix must always be
547 * on-link, and its lifetimes never expire.
549 pr0.ndpr_raf_onlink = 1;
550 pr0.ndpr_raf_auto = 1; /* probably meaningless */
551 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
552 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
554 * Since there is no other link-local addresses, nd6_prefix_lookup()
555 * probably returns NULL. However, we cannot always expect the result.
556 * For example, if we first remove the (only) existing link-local
557 * address, and then reconfigure another one, the prefix is still
558 * valid with referring to the old link-local address.
560 if (nd6_prefix_lookup(&pr0) == NULL) {
561 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
569 in6_ifattach_loopback(ifp)
570 struct ifnet *ifp; /* must be IFT_LOOP */
572 struct in6_aliasreq ifra;
575 bzero(&ifra, sizeof(ifra));
578 * in6_update_ifa() does not use ifra_name, but we accurately set it
581 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
583 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
584 ifra.ifra_prefixmask.sin6_family = AF_INET6;
585 ifra.ifra_prefixmask.sin6_addr = in6mask128;
588 * Always initialize ia_dstaddr (= broadcast address) to loopback
589 * address. Follows IPv4 practice - see in_ifinit().
591 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
592 ifra.ifra_dstaddr.sin6_family = AF_INET6;
593 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
595 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
596 ifra.ifra_addr.sin6_family = AF_INET6;
597 ifra.ifra_addr.sin6_addr = in6addr_loopback;
599 /* the loopback address should NEVER expire. */
600 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
601 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
603 /* we don't need to perform DAD on loopback interfaces. */
604 ifra.ifra_flags |= IN6_IFF_NODAD;
606 /* skip registration to the prefix list. XXX should be temporary. */
607 ifra.ifra_flags |= IN6_IFF_NOPFX;
610 * We are sure that this is a newly assigned address, so we can set
611 * NULL to the 3rd arg.
613 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
614 log(LOG_ERR, "in6_ifattach_loopback: failed to configure "
615 "the loopback address on %s (errno=%d)\n",
616 if_name(ifp), error);
624 * compute NI group address, based on the current hostname setting.
625 * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
627 * when ifp == NULL, the caller is responsible for filling scopeid.
630 in6_nigroup(ifp, name, namelen, in6)
634 struct in6_addr *in6;
641 char n[64]; /* a single label must not exceed 63 chars */
643 if (!namelen || !name)
647 while (p && *p && *p != '.' && p - name < namelen)
649 if (p - name > sizeof(n) - 1)
650 return -1; /* label too long */
654 for (q = n; *q; q++) {
655 if ('A' <= *q && *q <= 'Z')
659 /* generate 8 bytes of pseudo-random value. */
660 bzero(&ctxt, sizeof(ctxt));
662 MD5Update(&ctxt, &l, sizeof(l));
663 MD5Update(&ctxt, n, l);
664 MD5Final(digest, &ctxt);
666 bzero(in6, sizeof(*in6));
667 in6->s6_addr16[0] = htons(0xff02);
669 in6->s6_addr16[1] = htons(ifp->if_index);
670 in6->s6_addr8[11] = 2;
671 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
677 in6_nigroup_attach(name, namelen)
682 struct sockaddr_in6 mltaddr;
683 struct in6_multi *in6m;
686 bzero(&mltaddr, sizeof(mltaddr));
687 mltaddr.sin6_family = AF_INET6;
688 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
689 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
692 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
694 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
695 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
697 if (!in6_addmulti(&mltaddr.sin6_addr, ifp, &error)) {
698 nd6log((LOG_ERR, "%s: failed to join %s "
699 "(errno=%d)\n", if_name(ifp),
700 ip6_sprintf(&mltaddr.sin6_addr),
708 in6_nigroup_detach(name, namelen)
713 struct sockaddr_in6 mltaddr;
714 struct in6_multi *in6m;
716 bzero(&mltaddr, sizeof(mltaddr));
717 mltaddr.sin6_family = AF_INET6;
718 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
719 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
722 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
724 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
725 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
732 * XXX multiple loopback interface needs more care. for instance,
733 * nodelocal address needs to be configured onto only one of them.
734 * XXX multiple link-local address case
737 in6_ifattach(ifp, altifp)
739 struct ifnet *altifp; /* secondary EUI64 source */
741 static size_t if_indexlim = 8;
742 struct in6_ifaddr *ia;
745 /* some of the interfaces are inherently not IPv6 capable */
746 switch (ifp->if_type) {
747 #ifdef IFT_BRIDGE /*OpenBSD 2.8*/
754 * We have some arrays that should be indexed by if_index.
755 * since if_index will grow dynamically, they should grow too.
756 * struct in6_ifstat **in6_ifstat
757 * struct icmp6_ifstat **icmp6_ifstat
759 if (in6_ifstat == NULL || icmp6_ifstat == NULL ||
760 if_index >= if_indexlim) {
766 while (if_index >= if_indexlim)
769 /* grow in6_ifstat */
770 n = if_indexlim * sizeof(struct in6_ifstat *);
771 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
774 bcopy((caddr_t)in6_ifstat, q,
775 olim * sizeof(struct in6_ifstat *));
776 free((caddr_t)in6_ifstat, M_IFADDR);
778 in6_ifstat = (struct in6_ifstat **)q;
779 in6_ifstatmax = if_indexlim;
781 /* grow icmp6_ifstat */
782 n = if_indexlim * sizeof(struct icmp6_ifstat *);
783 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
786 bcopy((caddr_t)icmp6_ifstat, q,
787 olim * sizeof(struct icmp6_ifstat *));
788 free((caddr_t)icmp6_ifstat, M_IFADDR);
790 icmp6_ifstat = (struct icmp6_ifstat **)q;
791 icmp6_ifstatmax = if_indexlim;
794 /* initialize scope identifiers */
795 scope6_ifattach(ifp);
798 * quirks based on interface type
800 switch (ifp->if_type) {
804 * 6to4 interface is a very special kind of beast.
805 * no multicast, no linklocal. RFC2529 specifies how to make
806 * linklocals for 6to4 interface, but there's no use and
807 * it is rather harmful to have one.
816 * usually, we require multicast capability to the interface
818 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
819 log(LOG_INFO, "in6_ifattach: "
820 "%s is not multicast capable, IPv6 not enabled\n",
826 * assign loopback address for loopback interface.
827 * XXX multiple loopback interface case.
829 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
830 in6 = in6addr_loopback;
831 if (in6ifa_ifpwithaddr(ifp, &in6) == NULL) {
832 if (in6_ifattach_loopback(ifp) != 0)
838 * assign a link-local address, if there's none.
840 if (ip6_auto_linklocal) {
841 ia = in6ifa_ifpforlinklocal(ifp, 0);
843 if (in6_ifattach_linklocal(ifp, altifp) == 0) {
844 /* linklocal address assigned */
846 /* failed to assign linklocal address. bark? */
851 #ifdef IFT_STF /* XXX */
855 /* update dynamically. */
856 if (in6_maxmtu < ifp->if_mtu)
857 in6_maxmtu = ifp->if_mtu;
859 if (in6_ifstat[ifp->if_index] == NULL) {
860 in6_ifstat[ifp->if_index] = (struct in6_ifstat *)
861 malloc(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK);
862 bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat));
864 if (icmp6_ifstat[ifp->if_index] == NULL) {
865 icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *)
866 malloc(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK);
867 bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat));
870 /* initialize NDP variables */
875 * NOTE: in6_ifdetach() does not support loopback if at this moment.
876 * We don't need this function in bsdi, because interfaces are never removed
877 * from the ifnet list in bsdi.
883 struct in6_ifaddr *ia, *oia;
884 struct ifaddr *ifa, *next;
887 struct sockaddr_in6 sin6;
888 struct in6_multi *in6m;
889 struct in6_multi *in6m_next;
891 /* nuke prefix list. this may try to remove some of ifaddrs as well */
892 in6_purgeprefix(ifp);
894 /* remove neighbor management table */
897 /* nuke any of IPv6 addresses we have */
898 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next)
900 next = ifa->ifa_list.tqe_next;
901 if (ifa->ifa_addr->sa_family != AF_INET6)
906 /* undo everything done by in6_ifattach(), just in case */
907 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next)
909 next = ifa->ifa_list.tqe_next;
912 if (ifa->ifa_addr->sa_family != AF_INET6
913 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
917 ia = (struct in6_ifaddr *)ifa;
919 /* remove from the routing table */
920 if ((ia->ia_flags & IFA_ROUTE)
921 && (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0UL))) {
922 rtflags = rt->rt_flags;
924 rtrequest(RTM_DELETE,
925 (struct sockaddr *)&ia->ia_addr,
926 (struct sockaddr *)&ia->ia_addr,
927 (struct sockaddr *)&ia->ia_prefixmask,
928 rtflags, (struct rtentry **)0);
931 /* remove from the linked list */
932 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
933 IFAFREE(&ia->ia_ifa);
935 /* also remove from the IPv6 address chain(itojun&jinmei) */
937 if (oia == (ia = in6_ifaddr))
938 in6_ifaddr = ia->ia_next;
940 while (ia->ia_next && (ia->ia_next != oia))
943 ia->ia_next = oia->ia_next;
946 "%s: didn't unlink in6ifaddr from "
947 "list\n", if_name(ifp)));
951 IFAFREE(&oia->ia_ifa);
954 /* leave from all multicast groups joined */
955 in6_pcbpurgeif0(LIST_FIRST(udbinfo.listhead), ifp);
956 in6_pcbpurgeif0(LIST_FIRST(ripcbinfo.listhead), ifp);
957 for (in6m = LIST_FIRST(&in6_multihead); in6m; in6m = in6m_next) {
958 in6m_next = LIST_NEXT(in6m, in6m_entry);
959 if (in6m->in6m_ifp != ifp)
966 * remove neighbor management table. we call it twice just to make
967 * sure we nuke everything. maybe we need just one call.
968 * XXX: since the first call did not release addresses, some prefixes
969 * might remain. We should call nd6_purge() again to release the
970 * prefixes after removing all addresses above.
971 * (Or can we just delay calling nd6_purge until at this point?)
975 /* remove route to link-local allnodes multicast (ff02::1) */
976 bzero(&sin6, sizeof(sin6));
977 sin6.sin6_len = sizeof(struct sockaddr_in6);
978 sin6.sin6_family = AF_INET6;
979 sin6.sin6_addr = in6addr_linklocal_allnodes;
980 sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
981 rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
982 if (rt && rt->rt_ifp == ifp) {
983 rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
984 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
990 in6_get_tmpifid(ifp, retbuf, baseid, generate)
993 const u_int8_t *baseid;
997 struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
999 bzero(nullbuf, sizeof(nullbuf));
1000 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
1001 /* we've never created a random ID. Create a new one. */
1006 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
1008 /* generate_tmp_ifid will update seedn and buf */
1009 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
1012 bcopy(ndi->randomid, retbuf, 8);
1016 in6_tmpaddrtimer(ignored_arg)
1020 struct nd_ifinfo *ndi;
1021 u_int8_t nullbuf[8];
1024 callout_reset(&in6_tmpaddrtimer_ch,
1025 (ip6_temp_preferred_lifetime - ip6_desync_factor -
1026 ip6_temp_regen_advance) * hz,
1027 in6_tmpaddrtimer, NULL);
1029 bzero(nullbuf, sizeof(nullbuf));
1030 for (i = 1; i < if_index + 1; i++) {
1031 ndi = &nd_ifinfo[i];
1032 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
1034 * We've been generating a random ID on this interface.
1037 (void)generate_tmp_ifid(ndi->randomseed0,