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 1.6 2004/06/07 07:02:42 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 (struct ifnet *, struct in6_addr *);
82 static int generate_tmp_ifid (u_int8_t *, const u_int8_t *, u_int8_t *);
83 static int get_hw_ifid (struct ifnet *, struct in6_addr *);
84 static int get_ifid (struct ifnet *, struct ifnet *, struct in6_addr *);
85 static int in6_ifattach_linklocal (struct ifnet *, struct ifnet *);
86 static int in6_ifattach_loopback (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(struct ifnet *ifp,
108 struct in6_addr *in6) /* upper 64bits are preserved */
112 int hostnamelen = strlen(hostname);
115 /* we need at least several letters as seed for ifid */
120 /* generate 8 bytes of pseudo-random value. */
121 bzero(&ctxt, sizeof(ctxt));
123 MD5Update(&ctxt, hostname, hostnamelen);
124 MD5Final(digest, &ctxt);
126 /* assumes sizeof(digest) > sizeof(ifid) */
127 bcopy(digest, &in6->s6_addr[8], 8);
129 /* make sure to set "u" bit to local, and "g" bit to individual. */
130 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
131 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
133 /* convert EUI64 into IPv6 interface identifier */
140 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
143 u_int8_t seed[16], digest[16], nullbuf[8];
147 /* If there's no hisotry, start with a random seed. */
148 bzero(nullbuf, sizeof(nullbuf));
149 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
152 for (i = 0; i < 2; i++) {
154 val32 = random() ^ tv.tv_usec;
155 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
158 bcopy(seed0, seed, 8);
161 /* copy the right-most 64-bits of the given address */
162 /* XXX assumption on the size of IFID */
163 bcopy(seed1, &seed[8], 8);
165 if (0) { /* for debugging purposes only */
168 printf("generate_tmp_ifid: new randomized ID from: ");
169 for (i = 0; i < 16; i++)
170 printf("%02x", seed[i]);
174 /* generate 16 bytes of pseudo-random value. */
175 bzero(&ctxt, sizeof(ctxt));
177 MD5Update(&ctxt, seed, sizeof(seed));
178 MD5Final(digest, &ctxt);
181 * RFC 3041 3.2.1. (3)
182 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
183 * left-most bit is numbered 0) to zero.
185 bcopy(digest, ret, 8);
186 ret[0] &= ~EUI64_UBIT;
189 * XXX: we'd like to ensure that the generated value is not zero
190 * for simplicity. If the caclculated digest happens to be zero,
191 * use a random non-zero value as the last resort.
193 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
195 "generate_tmp_ifid: computed MD5 value is zero.\n");
198 val32 = random() ^ tv.tv_usec;
199 val32 = 1 + (val32 % (0xffffffff - 1));
203 * RFC 3041 3.2.1. (4)
204 * Take the rightmost 64-bits of the MD5 digest and save them in
205 * stable storage as the history value to be used in the next
206 * iteration of the algorithm.
208 bcopy(&digest[8], seed0, 8);
210 if (0) { /* for debugging purposes only */
214 for (i = 0; i < 16; i++)
215 printf("%02x", digest[i]);
223 * Get interface identifier for the specified interface.
224 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
227 get_hw_ifid(struct ifnet *ifp,
228 struct in6_addr *in6) /* upper 64bits are preserved */
231 struct sockaddr_dl *sdl;
234 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
235 static u_int8_t allone[8] =
236 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
238 for (ifa = ifp->if_addrlist.tqh_first;
240 ifa = ifa->ifa_list.tqe_next)
242 if (ifa->ifa_addr->sa_family != AF_LINK)
244 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
247 if (sdl->sdl_alen == 0)
257 addrlen = sdl->sdl_alen;
260 switch (ifp->if_type) {
268 /* IEEE802/EUI64 cases - what others? */
269 /* IEEE1394 uses 16byte length address starting with EUI64 */
273 /* look at IEEE802/EUI64 only */
274 if (addrlen != 8 && addrlen != 6)
278 * check for invalid MAC address - on bsdi, we see it a lot
279 * since wildboar configures all-zero MAC on pccard before
282 if (bcmp(addr, allzero, addrlen) == 0)
284 if (bcmp(addr, allone, addrlen) == 0)
287 /* make EUI64 address */
289 bcopy(addr, &in6->s6_addr[8], 8);
290 else if (addrlen == 6) {
291 in6->s6_addr[8] = addr[0];
292 in6->s6_addr[9] = addr[1];
293 in6->s6_addr[10] = addr[2];
294 in6->s6_addr[11] = 0xff;
295 in6->s6_addr[12] = 0xfe;
296 in6->s6_addr[13] = addr[3];
297 in6->s6_addr[14] = addr[4];
298 in6->s6_addr[15] = addr[5];
308 bzero(&in6->s6_addr[8], 8);
309 in6->s6_addr[15] = addr[0];
312 * due to insufficient bitwidth, we mark it local.
314 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
315 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
323 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
324 * however, IPv4 address is not very suitable as unique
325 * identifier source (can be renumbered).
334 /* sanity check: g bit must not indicate "group" */
335 if (EUI64_GROUP(in6))
338 /* convert EUI64 into IPv6 interface identifier */
342 * sanity check: ifid must not be all zero, avoid conflict with
343 * subnet router anycast
345 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
346 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
354 * Get interface identifier for the specified interface. If it is not
355 * available on ifp0, borrow interface identifier from other information
359 get_ifid(struct ifnet *ifp0,
360 struct ifnet *altifp, /* secondary EUI64 source */
361 struct in6_addr *in6)
365 /* first, try to get it from the interface itself */
366 if (get_hw_ifid(ifp0, in6) == 0) {
367 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
372 /* try secondary EUI64 source. this basically is for ATM PVC */
373 if (altifp && get_hw_ifid(altifp, in6) == 0) {
374 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
375 if_name(ifp0), if_name(altifp)));
379 /* next, try to get it from some other hardware interface */
380 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
384 if (get_hw_ifid(ifp, in6) != 0)
388 * to borrow ifid from other interface, ifid needs to be
391 if (IFID_UNIVERSAL(in6)) {
393 "%s: borrow interface identifier from %s\n",
394 if_name(ifp0), if_name(ifp)));
399 /* last resort: get from random number source */
400 if (get_rand_ifid(ifp, in6) == 0) {
402 "%s: interface identifier generated by random number\n",
407 printf("%s: failed to get interface identifier\n", if_name(ifp0));
411 nd6log((LOG_INFO, "%s: ifid: "
412 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
414 in6->s6_addr[8], in6->s6_addr[9],
415 in6->s6_addr[10], in6->s6_addr[11],
416 in6->s6_addr[12], in6->s6_addr[13],
417 in6->s6_addr[14], in6->s6_addr[15]));
422 in6_ifattach_linklocal(struct ifnet *ifp,
423 struct ifnet *altifp) /* secondary EUI64 source */
425 struct in6_ifaddr *ia;
426 struct in6_aliasreq ifra;
427 struct nd_prefix pr0;
431 * configure link-local address.
433 bzero(&ifra, sizeof(ifra));
436 * in6_update_ifa() does not use ifra_name, but we accurately set it
439 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
441 ifra.ifra_addr.sin6_family = AF_INET6;
442 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
443 ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
445 ifra.ifra_addr.sin6_addr.s6_addr16[1] = 0
447 ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */
449 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
450 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
451 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
452 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
454 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
456 "%s: no ifid available\n", if_name(ifp)));
461 ifra.ifra_addr.sin6_scope_id =
462 in6_addr2scopeid(ifp, &ifra.ifra_addr.sin6_addr);
465 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
466 ifra.ifra_prefixmask.sin6_family = AF_INET6;
467 ifra.ifra_prefixmask.sin6_addr = in6mask64;
469 /* take into accound the sin6_scope_id field for routing */
470 ifra.ifra_prefixmask.sin6_scope_id = 0xffffffff;
472 /* link-local addresses should NEVER expire. */
473 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
474 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
477 * Do not let in6_update_ifa() do DAD, since we need a random delay
478 * before sending an NS at the first time the interface becomes up.
479 * Instead, in6_if_up() will start DAD with a proper random delay.
481 ifra.ifra_flags |= IN6_IFF_NODAD;
484 * Now call in6_update_ifa() to do a bunch of procedures to configure
485 * a link-local address. We can set NULL to the 3rd argument, because
486 * we know there's no other link-local address on the interface
487 * and therefore we are adding one (instead of updating one).
489 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
491 * XXX: When the interface does not support IPv6, this call
492 * would fail in the SIOCSIFADDR ioctl. I believe the
493 * notification is rather confusing in this case, so just
494 * supress it. (jinmei@kame.net 20010130)
496 if (error != EAFNOSUPPORT)
497 log(LOG_NOTICE, "in6_ifattach_linklocal: failed to "
498 "configure a link-local address on %s "
500 if_name(ifp), error);
505 * Adjust ia6_flags so that in6_if_up will perform DAD.
506 * XXX: Some P2P interfaces seem not to send packets just after
507 * becoming up, so we skip p2p interfaces for safety.
509 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
512 panic("ia == NULL in in6_ifattach_linklocal");
516 if (in6if_do_dad(ifp) && (ifp->if_flags & IFF_POINTOPOINT) == 0) {
517 ia->ia6_flags &= ~IN6_IFF_NODAD;
518 ia->ia6_flags |= IN6_IFF_TENTATIVE;
522 * Make the link-local prefix (fe80::/64%link) as on-link.
523 * Since we'd like to manage prefixes separately from addresses,
524 * we make an ND6 prefix structure for the link-local prefix,
525 * and add it to the prefix list as a never-expire prefix.
526 * XXX: this change might affect some existing code base...
528 bzero(&pr0, sizeof(pr0));
530 /* this should be 64 at this moment. */
531 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
532 pr0.ndpr_mask = ifra.ifra_prefixmask.sin6_addr;
533 pr0.ndpr_prefix = ifra.ifra_addr;
534 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
535 for (i = 0; i < 4; i++) {
536 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
537 in6mask64.s6_addr32[i];
540 * Initialize parameters. The link-local prefix must always be
541 * on-link, and its lifetimes never expire.
543 pr0.ndpr_raf_onlink = 1;
544 pr0.ndpr_raf_auto = 1; /* probably meaningless */
545 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
546 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
548 * Since there is no other link-local addresses, nd6_prefix_lookup()
549 * probably returns NULL. However, we cannot always expect the result.
550 * For example, if we first remove the (only) existing link-local
551 * address, and then reconfigure another one, the prefix is still
552 * valid with referring to the old link-local address.
554 if (nd6_prefix_lookup(&pr0) == NULL) {
555 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
563 in6_ifattach_loopback(struct ifnet *ifp) /* must be IFT_LOOP */
565 struct in6_aliasreq ifra;
568 bzero(&ifra, sizeof(ifra));
571 * in6_update_ifa() does not use ifra_name, but we accurately set it
574 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
576 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
577 ifra.ifra_prefixmask.sin6_family = AF_INET6;
578 ifra.ifra_prefixmask.sin6_addr = in6mask128;
581 * Always initialize ia_dstaddr (= broadcast address) to loopback
582 * address. Follows IPv4 practice - see in_ifinit().
584 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
585 ifra.ifra_dstaddr.sin6_family = AF_INET6;
586 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
588 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
589 ifra.ifra_addr.sin6_family = AF_INET6;
590 ifra.ifra_addr.sin6_addr = in6addr_loopback;
592 /* the loopback address should NEVER expire. */
593 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
594 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
596 /* we don't need to perform DAD on loopback interfaces. */
597 ifra.ifra_flags |= IN6_IFF_NODAD;
599 /* skip registration to the prefix list. XXX should be temporary. */
600 ifra.ifra_flags |= IN6_IFF_NOPFX;
603 * We are sure that this is a newly assigned address, so we can set
604 * NULL to the 3rd arg.
606 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
607 log(LOG_ERR, "in6_ifattach_loopback: failed to configure "
608 "the loopback address on %s (errno=%d)\n",
609 if_name(ifp), error);
617 * compute NI group address, based on the current hostname setting.
618 * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
620 * when ifp == NULL, the caller is responsible for filling scopeid.
623 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
624 struct in6_addr *in6)
631 char n[64]; /* a single label must not exceed 63 chars */
633 if (!namelen || !name)
637 while (p && *p && *p != '.' && p - name < namelen)
639 if (p - name > sizeof(n) - 1)
640 return -1; /* label too long */
644 for (q = n; *q; q++) {
645 if ('A' <= *q && *q <= 'Z')
649 /* generate 8 bytes of pseudo-random value. */
650 bzero(&ctxt, sizeof(ctxt));
652 MD5Update(&ctxt, &l, sizeof(l));
653 MD5Update(&ctxt, n, l);
654 MD5Final(digest, &ctxt);
656 bzero(in6, sizeof(*in6));
657 in6->s6_addr16[0] = htons(0xff02);
659 in6->s6_addr16[1] = htons(ifp->if_index);
660 in6->s6_addr8[11] = 2;
661 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
667 in6_nigroup_attach(const char *name, int namelen)
670 struct sockaddr_in6 mltaddr;
671 struct in6_multi *in6m;
674 bzero(&mltaddr, sizeof(mltaddr));
675 mltaddr.sin6_family = AF_INET6;
676 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
677 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
680 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
682 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
683 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
685 if (!in6_addmulti(&mltaddr.sin6_addr, ifp, &error)) {
686 nd6log((LOG_ERR, "%s: failed to join %s "
687 "(errno=%d)\n", if_name(ifp),
688 ip6_sprintf(&mltaddr.sin6_addr),
696 in6_nigroup_detach(const char *name, int namelen)
699 struct sockaddr_in6 mltaddr;
700 struct in6_multi *in6m;
702 bzero(&mltaddr, sizeof(mltaddr));
703 mltaddr.sin6_family = AF_INET6;
704 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
705 if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0)
708 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
710 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
711 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
718 * XXX multiple loopback interface needs more care. for instance,
719 * nodelocal address needs to be configured onto only one of them.
720 * XXX multiple link-local address case
723 in6_ifattach(struct ifnet *ifp,
724 struct ifnet *altifp) /* secondary EUI64 source */
726 static size_t if_indexlim = 8;
727 struct in6_ifaddr *ia;
730 /* some of the interfaces are inherently not IPv6 capable */
731 switch (ifp->if_type) {
732 #ifdef IFT_BRIDGE /*OpenBSD 2.8*/
739 * We have some arrays that should be indexed by if_index.
740 * since if_index will grow dynamically, they should grow too.
741 * struct in6_ifstat **in6_ifstat
742 * struct icmp6_ifstat **icmp6_ifstat
744 if (in6_ifstat == NULL || icmp6_ifstat == NULL ||
745 if_index >= if_indexlim) {
751 while (if_index >= if_indexlim)
754 /* grow in6_ifstat */
755 n = if_indexlim * sizeof(struct in6_ifstat *);
756 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
759 bcopy((caddr_t)in6_ifstat, q,
760 olim * sizeof(struct in6_ifstat *));
761 free((caddr_t)in6_ifstat, M_IFADDR);
763 in6_ifstat = (struct in6_ifstat **)q;
764 in6_ifstatmax = if_indexlim;
766 /* grow icmp6_ifstat */
767 n = if_indexlim * sizeof(struct icmp6_ifstat *);
768 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
771 bcopy((caddr_t)icmp6_ifstat, q,
772 olim * sizeof(struct icmp6_ifstat *));
773 free((caddr_t)icmp6_ifstat, M_IFADDR);
775 icmp6_ifstat = (struct icmp6_ifstat **)q;
776 icmp6_ifstatmax = if_indexlim;
779 /* initialize scope identifiers */
780 scope6_ifattach(ifp);
783 * quirks based on interface type
785 switch (ifp->if_type) {
789 * 6to4 interface is a very special kind of beast.
790 * no multicast, no linklocal. RFC2529 specifies how to make
791 * linklocals for 6to4 interface, but there's no use and
792 * it is rather harmful to have one.
801 * usually, we require multicast capability to the interface
803 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
804 log(LOG_INFO, "in6_ifattach: "
805 "%s is not multicast capable, IPv6 not enabled\n",
811 * assign loopback address for loopback interface.
812 * XXX multiple loopback interface case.
814 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
815 in6 = in6addr_loopback;
816 if (in6ifa_ifpwithaddr(ifp, &in6) == NULL) {
817 if (in6_ifattach_loopback(ifp) != 0)
823 * assign a link-local address, if there's none.
825 if (ip6_auto_linklocal) {
826 ia = in6ifa_ifpforlinklocal(ifp, 0);
828 if (in6_ifattach_linklocal(ifp, altifp) == 0) {
829 /* linklocal address assigned */
831 /* failed to assign linklocal address. bark? */
836 #ifdef IFT_STF /* XXX */
840 /* update dynamically. */
841 if (in6_maxmtu < ifp->if_mtu)
842 in6_maxmtu = ifp->if_mtu;
844 if (in6_ifstat[ifp->if_index] == NULL) {
845 in6_ifstat[ifp->if_index] = (struct in6_ifstat *)
846 malloc(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK);
847 bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat));
849 if (icmp6_ifstat[ifp->if_index] == NULL) {
850 icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *)
851 malloc(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK);
852 bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat));
855 /* initialize NDP variables */
860 * NOTE: in6_ifdetach() does not support loopback if at this moment.
861 * We don't need this function in bsdi, because interfaces are never removed
862 * from the ifnet list in bsdi.
865 in6_ifdetach(struct ifnet *ifp)
867 struct in6_ifaddr *ia, *oia;
868 struct ifaddr *ifa, *next;
871 struct sockaddr_in6 sin6;
872 struct in6_multi *in6m;
873 struct in6_multi *in6m_next;
875 /* nuke prefix list. this may try to remove some of ifaddrs as well */
876 in6_purgeprefix(ifp);
878 /* remove neighbor management table */
881 /* nuke any of IPv6 addresses we have */
882 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next)
884 next = ifa->ifa_list.tqe_next;
885 if (ifa->ifa_addr->sa_family != AF_INET6)
890 /* undo everything done by in6_ifattach(), just in case */
891 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next)
893 next = ifa->ifa_list.tqe_next;
896 if (ifa->ifa_addr->sa_family != AF_INET6
897 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
901 ia = (struct in6_ifaddr *)ifa;
903 /* remove from the routing table */
904 if ((ia->ia_flags & IFA_ROUTE)
905 && (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0UL))) {
906 rtflags = rt->rt_flags;
908 rtrequest(RTM_DELETE,
909 (struct sockaddr *)&ia->ia_addr,
910 (struct sockaddr *)&ia->ia_addr,
911 (struct sockaddr *)&ia->ia_prefixmask,
912 rtflags, (struct rtentry **)0);
915 /* remove from the linked list */
916 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
917 IFAFREE(&ia->ia_ifa);
919 /* also remove from the IPv6 address chain(itojun&jinmei) */
921 if (oia == (ia = in6_ifaddr))
922 in6_ifaddr = ia->ia_next;
924 while (ia->ia_next && (ia->ia_next != oia))
927 ia->ia_next = oia->ia_next;
930 "%s: didn't unlink in6ifaddr from "
931 "list\n", if_name(ifp)));
935 IFAFREE(&oia->ia_ifa);
938 /* leave from all multicast groups joined */
939 in6_pcbpurgeif0(LIST_FIRST(&udbinfo.pcblisthead), ifp);
940 in6_pcbpurgeif0(LIST_FIRST(&ripcbinfo.pcblisthead), ifp);
941 for (in6m = LIST_FIRST(&in6_multihead); in6m; in6m = in6m_next) {
942 in6m_next = LIST_NEXT(in6m, in6m_entry);
943 if (in6m->in6m_ifp != ifp)
950 * remove neighbor management table. we call it twice just to make
951 * sure we nuke everything. maybe we need just one call.
952 * XXX: since the first call did not release addresses, some prefixes
953 * might remain. We should call nd6_purge() again to release the
954 * prefixes after removing all addresses above.
955 * (Or can we just delay calling nd6_purge until at this point?)
959 /* remove route to link-local allnodes multicast (ff02::1) */
960 bzero(&sin6, sizeof(sin6));
961 sin6.sin6_len = sizeof(struct sockaddr_in6);
962 sin6.sin6_family = AF_INET6;
963 sin6.sin6_addr = in6addr_linklocal_allnodes;
964 sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
965 rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
966 if (rt && rt->rt_ifp == ifp) {
967 rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
968 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
974 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf, const u_int8_t *baseid,
978 struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
980 bzero(nullbuf, sizeof(nullbuf));
981 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
982 /* we've never created a random ID. Create a new one. */
987 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
989 /* generate_tmp_ifid will update seedn and buf */
990 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
993 bcopy(ndi->randomid, retbuf, 8);
997 in6_tmpaddrtimer(void *ignored_arg)
1000 struct nd_ifinfo *ndi;
1001 u_int8_t nullbuf[8];
1004 callout_reset(&in6_tmpaddrtimer_ch,
1005 (ip6_temp_preferred_lifetime - ip6_desync_factor -
1006 ip6_temp_regen_advance) * hz,
1007 in6_tmpaddrtimer, NULL);
1009 bzero(nullbuf, sizeof(nullbuf));
1010 for (i = 1; i < if_index + 1; i++) {
1011 ndi = &nd_ifinfo[i];
1012 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
1014 * We've been generating a random ID on this interface.
1017 (void)generate_tmp_ifid(ndi->randomseed0,