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>
41 #include <sys/kernel.h>
43 #include <sys/syslog.h>
47 #include <net/if_var.h>
48 #include <net/if_dl.h>
49 #include <net/if_types.h>
50 #include <net/route.h>
53 #include <netinet/in.h>
54 #include <netinet/in_var.h>
55 #include <netinet/if_ether.h>
56 #include <netinet/in_pcb.h>
57 #include <netinet/ip_var.h>
58 #include <netinet/udp.h>
59 #include <netinet/udp_var.h>
61 #include <netinet/ip6.h>
62 #include <netinet6/ip6_var.h>
63 #include <netinet6/in6_var.h>
64 #include <netinet6/in6_pcb.h>
65 #include <netinet6/in6_ifattach.h>
66 #include <netinet6/ip6_var.h>
67 #include <netinet6/nd6.h>
68 #include <netinet6/mld6_var.h>
69 #include <netinet6/scope6_var.h>
71 VNET_DEFINE(unsigned long, in6_maxmtu) = 0;
73 #ifdef IP6_AUTO_LINKLOCAL
74 VNET_DEFINE(int, ip6_auto_linklocal) = IP6_AUTO_LINKLOCAL;
76 VNET_DEFINE(int, ip6_auto_linklocal) = 1; /* enabled by default */
79 VNET_DEFINE(struct callout, in6_tmpaddrtimer_ch);
80 #define V_in6_tmpaddrtimer_ch VNET(in6_tmpaddrtimer_ch)
82 VNET_DECLARE(struct inpcbinfo, ripcbinfo);
83 #define V_ripcbinfo VNET(ripcbinfo)
85 static int get_rand_ifid(struct ifnet *, struct in6_addr *);
86 static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *);
87 static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *);
88 static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *);
89 static int in6_ifattach_loopback(struct ifnet *);
90 static void in6_purgemaddrs(struct ifnet *);
92 #define EUI64_GBIT 0x01
93 #define EUI64_UBIT 0x02
94 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
95 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
96 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
97 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
98 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
100 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
101 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
104 * Generate a last-resort interface identifier, when the machine has no
105 * IEEE802/EUI64 address sources.
106 * The goal here is to get an interface identifier that is
107 * (1) random enough and (2) does not change across reboot.
108 * We currently use MD5(hostname) for it.
110 * in6 - upper 64bits are preserved
113 get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
120 pr = curthread->td_ucred->cr_prison;
121 mtx_lock(&pr->pr_mtx);
122 hostnamelen = strlen(pr->pr_hostname);
124 /* we need at least several letters as seed for ifid */
125 if (hostnamelen < 3) {
126 mtx_unlock(&pr->pr_mtx);
131 /* generate 8 bytes of pseudo-random value. */
132 bzero(&ctxt, sizeof(ctxt));
134 MD5Update(&ctxt, pr->pr_hostname, hostnamelen);
135 mtx_unlock(&pr->pr_mtx);
136 MD5Final(digest, &ctxt);
138 /* assumes sizeof(digest) > sizeof(ifid) */
139 bcopy(digest, &in6->s6_addr[8], 8);
141 /* make sure to set "u" bit to local, and "g" bit to individual. */
142 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
143 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
145 /* convert EUI64 into IPv6 interface identifier */
152 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
155 u_int8_t seed[16], digest[16], nullbuf[8];
158 /* If there's no history, start with a random seed. */
159 bzero(nullbuf, sizeof(nullbuf));
160 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
163 for (i = 0; i < 2; i++) {
164 val32 = arc4random();
165 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
168 bcopy(seed0, seed, 8);
170 /* copy the right-most 64-bits of the given address */
171 /* XXX assumption on the size of IFID */
172 bcopy(seed1, &seed[8], 8);
174 if (0) { /* for debugging purposes only */
177 printf("generate_tmp_ifid: new randomized ID from: ");
178 for (i = 0; i < 16; i++)
179 printf("%02x", seed[i]);
183 /* generate 16 bytes of pseudo-random value. */
184 bzero(&ctxt, sizeof(ctxt));
186 MD5Update(&ctxt, seed, sizeof(seed));
187 MD5Final(digest, &ctxt);
190 * RFC 3041 3.2.1. (3)
191 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
192 * left-most bit is numbered 0) to zero.
194 bcopy(digest, ret, 8);
195 ret[0] &= ~EUI64_UBIT;
198 * XXX: we'd like to ensure that the generated value is not zero
199 * for simplicity. If the caclculated digest happens to be zero,
200 * use a random non-zero value as the last resort.
202 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
204 "generate_tmp_ifid: computed MD5 value is zero.\n"));
206 val32 = arc4random();
207 val32 = 1 + (val32 % (0xffffffff - 1));
211 * RFC 3041 3.2.1. (4)
212 * Take the rightmost 64-bits of the MD5 digest and save them in
213 * stable storage as the history value to be used in the next
214 * iteration of the algorithm.
216 bcopy(&digest[8], seed0, 8);
218 if (0) { /* for debugging purposes only */
222 for (i = 0; i < 16; i++)
223 printf("%02x", digest[i]);
231 * Get interface identifier for the specified interface.
232 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
234 * in6 - upper 64bits are preserved
237 in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
240 struct sockaddr_dl *sdl;
243 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
244 static u_int8_t allone[8] =
245 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
248 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
249 if (ifa->ifa_addr->sa_family != AF_LINK)
251 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
254 if (sdl->sdl_alen == 0)
259 IF_ADDR_RUNLOCK(ifp);
264 IF_ADDR_LOCK_ASSERT(ifp);
266 addrlen = sdl->sdl_alen;
269 switch (ifp->if_type) {
278 /* IEEE802/EUI64 cases - what others? */
279 /* IEEE1394 uses 16byte length address starting with EUI64 */
283 /* look at IEEE802/EUI64 only */
284 if (addrlen != 8 && addrlen != 6) {
285 IF_ADDR_RUNLOCK(ifp);
290 * check for invalid MAC address - on bsdi, we see it a lot
291 * since wildboar configures all-zero MAC on pccard before
294 if (bcmp(addr, allzero, addrlen) == 0) {
295 IF_ADDR_RUNLOCK(ifp);
298 if (bcmp(addr, allone, addrlen) == 0) {
299 IF_ADDR_RUNLOCK(ifp);
303 /* make EUI64 address */
305 bcopy(addr, &in6->s6_addr[8], 8);
306 else if (addrlen == 6) {
307 in6->s6_addr[8] = addr[0];
308 in6->s6_addr[9] = addr[1];
309 in6->s6_addr[10] = addr[2];
310 in6->s6_addr[11] = 0xff;
311 in6->s6_addr[12] = 0xfe;
312 in6->s6_addr[13] = addr[3];
313 in6->s6_addr[14] = addr[4];
314 in6->s6_addr[15] = addr[5];
320 IF_ADDR_RUNLOCK(ifp);
324 IF_ADDR_RUNLOCK(ifp);
328 bzero(&in6->s6_addr[8], 8);
329 in6->s6_addr[15] = addr[0];
332 * due to insufficient bitwidth, we mark it local.
334 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
335 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
341 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
342 * however, IPv4 address is not very suitable as unique
343 * identifier source (can be renumbered).
346 IF_ADDR_RUNLOCK(ifp);
350 IF_ADDR_RUNLOCK(ifp);
354 /* sanity check: g bit must not indicate "group" */
355 if (EUI64_GROUP(in6)) {
356 IF_ADDR_RUNLOCK(ifp);
360 /* convert EUI64 into IPv6 interface identifier */
364 * sanity check: ifid must not be all zero, avoid conflict with
365 * subnet router anycast
367 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
368 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
369 IF_ADDR_RUNLOCK(ifp);
373 IF_ADDR_RUNLOCK(ifp);
378 * Get interface identifier for the specified interface. If it is not
379 * available on ifp0, borrow interface identifier from other information
382 * altifp - secondary EUI64 source
385 get_ifid(struct ifnet *ifp0, struct ifnet *altifp,
386 struct in6_addr *in6)
390 /* first, try to get it from the interface itself */
391 if (in6_get_hw_ifid(ifp0, in6) == 0) {
392 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
397 /* try secondary EUI64 source. this basically is for ATM PVC */
398 if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
399 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
400 if_name(ifp0), if_name(altifp)));
404 /* next, try to get it from some other hardware interface */
405 IFNET_RLOCK_NOSLEEP();
406 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
409 if (in6_get_hw_ifid(ifp, in6) != 0)
413 * to borrow ifid from other interface, ifid needs to be
416 if (IFID_UNIVERSAL(in6)) {
418 "%s: borrow interface identifier from %s\n",
419 if_name(ifp0), if_name(ifp)));
420 IFNET_RUNLOCK_NOSLEEP();
424 IFNET_RUNLOCK_NOSLEEP();
426 /* last resort: get from random number source */
427 if (get_rand_ifid(ifp, in6) == 0) {
429 "%s: interface identifier generated by random number\n",
434 printf("%s: failed to get interface identifier\n", if_name(ifp0));
438 nd6log((LOG_INFO, "%s: ifid: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
439 if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
440 in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
441 in6->s6_addr[14], in6->s6_addr[15]));
446 * altifp - secondary EUI64 source
449 in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet *altifp)
451 struct in6_ifaddr *ia;
452 struct in6_aliasreq ifra;
453 struct nd_prefixctl pr0;
457 * configure link-local address.
459 in6_prepare_ifra(&ifra, NULL, &in6mask64);
461 ifra.ifra_addr.sin6_addr.s6_addr32[0] = htonl(0xfe800000);
462 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
463 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
464 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
465 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
467 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
469 "%s: no ifid available\n", if_name(ifp)));
473 if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
476 /* link-local addresses should NEVER expire. */
477 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
478 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
481 * Now call in6_update_ifa() to do a bunch of procedures to configure
482 * a link-local address. We can set the 3rd argument to NULL, because
483 * we know there's no other link-local address on the interface
484 * and therefore we are adding one (instead of updating one).
486 if ((error = in6_update_ifa(ifp, &ifra, NULL,
487 IN6_IFAUPDATE_DADDELAY)) != 0) {
489 * XXX: When the interface does not support IPv6, this call
490 * would fail in the SIOCSIFADDR ioctl. I believe the
491 * notification is rather confusing in this case, so just
492 * suppress it. (jinmei@kame.net 20010130)
494 if (error != EAFNOSUPPORT)
495 nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
496 "configure a link-local address on %s "
498 if_name(ifp), error));
502 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
503 KASSERT(ia != NULL, ("%s: ia == NULL, ifp=%p", __func__, ifp));
505 ifa_free(&ia->ia_ifa);
508 * Make the link-local prefix (fe80::%link/64) as on-link.
509 * Since we'd like to manage prefixes separately from addresses,
510 * we make an ND6 prefix structure for the link-local prefix,
511 * and add it to the prefix list as a never-expire prefix.
512 * XXX: this change might affect some existing code base...
514 bzero(&pr0, sizeof(pr0));
516 /* this should be 64 at this moment. */
517 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
518 pr0.ndpr_prefix = ifra.ifra_addr;
519 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
520 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, &in6mask64);
522 * Initialize parameters. The link-local prefix must always be
523 * on-link, and its lifetimes never expire.
525 pr0.ndpr_raf_onlink = 1;
526 pr0.ndpr_raf_auto = 1; /* probably meaningless */
527 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
528 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
530 * Since there is no other link-local addresses, nd6_prefix_lookup()
531 * probably returns NULL. However, we cannot always expect the result.
532 * For example, if we first remove the (only) existing link-local
533 * address, and then reconfigure another one, the prefix is still
534 * valid with referring to the old link-local address.
536 if (nd6_prefix_lookup(&pr0) == NULL) {
537 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
545 * ifp - must be IFT_LOOP
548 in6_ifattach_loopback(struct ifnet *ifp)
550 struct in6_aliasreq ifra;
553 in6_prepare_ifra(&ifra, &in6addr_loopback, &in6mask128);
556 * Always initialize ia_dstaddr (= broadcast address) to loopback
557 * address. Follows IPv4 practice - see in_ifinit().
559 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
560 ifra.ifra_dstaddr.sin6_family = AF_INET6;
561 ifra.ifra_dstaddr.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.
591 * when ifp == NULL, the caller is responsible for filling scopeid.
593 * If oldmcprefix == 1, FF02:0:0:0:0:2::/96 is used for NI group address
594 * while it is FF02:0:0:0:0:2:FF00::/104 in RFC 4620.
597 in6_nigroup0(struct ifnet *ifp, const char *name, int namelen,
598 struct in6_addr *in6, int oldmcprefix)
606 char n[64]; /* a single label must not exceed 63 chars */
609 * If no name is given and namelen is -1,
610 * we try to do the hostname lookup ourselves.
612 if (!name && namelen == -1) {
613 pr = curthread->td_ucred->cr_prison;
614 mtx_lock(&pr->pr_mtx);
615 name = pr->pr_hostname;
616 namelen = strlen(name);
619 if (!name || !namelen) {
621 mtx_unlock(&pr->pr_mtx);
626 while (p && *p && *p != '.' && p - name < namelen)
628 if (p == name || p - name > sizeof(n) - 1) {
630 mtx_unlock(&pr->pr_mtx);
631 return -1; /* label too long */
636 mtx_unlock(&pr->pr_mtx);
638 for (q = n; *q; q++) {
639 if ('A' <= *q && *q <= 'Z')
643 /* generate 16 bytes of pseudo-random value. */
644 bzero(&ctxt, sizeof(ctxt));
646 MD5Update(&ctxt, &l, sizeof(l));
647 MD5Update(&ctxt, n, l);
648 MD5Final(digest, &ctxt);
650 bzero(in6, sizeof(*in6));
651 in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
652 in6->s6_addr8[11] = 2;
653 if (oldmcprefix == 0) {
654 in6->s6_addr8[12] = 0xff;
655 /* Copy the first 24 bits of 128-bit hash into the address. */
656 bcopy(digest, &in6->s6_addr8[13], 3);
658 /* Copy the first 32 bits of 128-bit hash into the address. */
659 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
661 if (in6_setscope(in6, ifp, NULL))
662 return (-1); /* XXX: should not fail */
668 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
669 struct in6_addr *in6)
672 return (in6_nigroup0(ifp, name, namelen, in6, 0));
676 in6_nigroup_oldmcprefix(struct ifnet *ifp, const char *name, int namelen,
677 struct in6_addr *in6)
680 return (in6_nigroup0(ifp, name, namelen, in6, 1));
684 * XXX multiple loopback interface needs more care. for instance,
685 * nodelocal address needs to be configured onto only one of them.
686 * XXX multiple link-local address case
688 * altifp - secondary EUI64 source
691 in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
693 struct in6_ifaddr *ia;
696 if (ifp->if_afdata[AF_INET6] == NULL)
699 * quirks based on interface type
701 switch (ifp->if_type) {
704 * 6to4 interface is a very special kind of beast.
705 * no multicast, no linklocal. RFC2529 specifies how to make
706 * linklocals for 6to4 interface, but there's no use and
707 * it is rather harmful to have one.
709 ND_IFINFO(ifp)->flags &= ~ND6_IFF_AUTO_LINKLOCAL;
716 * usually, we require multicast capability to the interface
718 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
719 nd6log((LOG_INFO, "in6_ifattach: "
720 "%s is not multicast capable, IPv6 not enabled\n",
726 * assign loopback address for loopback interface.
727 * XXX multiple loopback interface case.
729 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
732 in6 = in6addr_loopback;
733 ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, &in6);
735 if (in6_ifattach_loopback(ifp) != 0)
742 * assign a link-local address, if there's none.
744 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
745 ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL) {
748 ia = in6ifa_ifpforlinklocal(ifp, 0);
750 error = in6_ifattach_linklocal(ifp, altifp);
753 log(LOG_NOTICE, "in6_ifattach_linklocal: "
754 "failed to add a link-local addr to %s\n",
758 ifa_free(&ia->ia_ifa);
761 /* update dynamically. */
762 if (V_in6_maxmtu < ifp->if_mtu)
763 V_in6_maxmtu = ifp->if_mtu;
767 * NOTE: in6_ifdetach() does not support loopback if at this moment.
768 * We don't need this function in bsdi, because interfaces are never removed
769 * from the ifnet list in bsdi.
772 in6_ifdetach(struct ifnet *ifp)
774 struct ifaddr *ifa, *next;
776 if (ifp->if_afdata[AF_INET6] == NULL)
779 /* remove neighbor management table */
783 * nuke any of IPv6 addresses we have
784 * XXX: all addresses should be already removed
786 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
787 if (ifa->ifa_addr->sa_family != AF_INET6)
791 in6_pcbpurgeif0(&V_udbinfo, ifp);
792 in6_pcbpurgeif0(&V_ulitecbinfo, ifp);
793 in6_pcbpurgeif0(&V_ripcbinfo, ifp);
794 /* leave from all multicast groups joined */
795 in6_purgemaddrs(ifp);
798 * remove neighbor management table. we call it twice just to make
799 * sure we nuke everything. maybe we need just one call.
800 * XXX: since the first call did not release addresses, some prefixes
801 * might remain. We should call nd6_purge() again to release the
802 * prefixes after removing all addresses above.
803 * (Or can we just delay calling nd6_purge until at this point?)
809 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf,
810 const u_int8_t *baseid, int generate)
813 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
815 bzero(nullbuf, sizeof(nullbuf));
816 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
817 /* we've never created a random ID. Create a new one. */
822 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
824 /* generate_tmp_ifid will update seedn and buf */
825 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
828 bcopy(ndi->randomid, retbuf, 8);
834 in6_tmpaddrtimer(void *arg)
836 CURVNET_SET((struct vnet *) arg);
837 struct nd_ifinfo *ndi;
841 callout_reset(&V_in6_tmpaddrtimer_ch,
842 (V_ip6_temp_preferred_lifetime - V_ip6_desync_factor -
843 V_ip6_temp_regen_advance) * hz, in6_tmpaddrtimer, curvnet);
845 bzero(nullbuf, sizeof(nullbuf));
846 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
847 if (ifp->if_afdata[AF_INET6] == NULL)
849 ndi = ND_IFINFO(ifp);
850 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
852 * We've been generating a random ID on this interface.
855 (void)generate_tmp_ifid(ndi->randomseed0,
856 ndi->randomseed1, ndi->randomid);
864 in6_purgemaddrs(struct ifnet *ifp)
866 LIST_HEAD(,in6_multi) purgeinms;
867 struct in6_multi *inm, *tinm;
868 struct ifmultiaddr *ifma;
870 LIST_INIT(&purgeinms);
874 * Extract list of in6_multi associated with the detaching ifp
875 * which the PF_INET6 layer is about to release.
876 * We need to do this as IF_ADDR_LOCK() may be re-acquired
877 * by code further down.
880 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
881 if (ifma->ifma_addr->sa_family != AF_INET6 ||
882 ifma->ifma_protospec == NULL)
884 inm = (struct in6_multi *)ifma->ifma_protospec;
885 LIST_INSERT_HEAD(&purgeinms, inm, in6m_entry);
887 IF_ADDR_RUNLOCK(ifp);
889 LIST_FOREACH_SAFE(inm, &purgeinms, in6m_entry, tinm) {
890 LIST_REMOVE(inm, in6m_entry);
891 in6m_release_locked(inm);