2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/socket.h>
41 #include <sys/sockio.h>
43 #include <sys/kernel.h>
46 #include <sys/rmlock.h>
47 #include <sys/syslog.h>
51 #include <net/if_var.h>
52 #include <net/if_dl.h>
53 #include <net/if_private.h>
54 #include <net/if_types.h>
55 #include <net/route.h>
58 #include <netinet/in.h>
59 #include <netinet/in_var.h>
60 #include <netinet/if_ether.h>
61 #include <netinet/in_pcb.h>
62 #include <netinet/ip_var.h>
63 #include <netinet/udp.h>
64 #include <netinet/udp_var.h>
66 #include <netinet/ip6.h>
67 #include <netinet6/ip6_var.h>
68 #include <netinet6/in6_var.h>
69 #include <netinet6/in6_pcb.h>
70 #include <netinet6/in6_ifattach.h>
71 #include <netinet6/ip6_var.h>
72 #include <netinet6/nd6.h>
73 #include <netinet6/mld6_var.h>
74 #include <netinet6/scope6_var.h>
76 VNET_DEFINE(unsigned long, in6_maxmtu) = 0;
78 #ifdef IP6_AUTO_LINKLOCAL
79 VNET_DEFINE(int, ip6_auto_linklocal) = IP6_AUTO_LINKLOCAL;
81 VNET_DEFINE(int, ip6_auto_linklocal) = 1; /* enabled by default */
84 VNET_DEFINE(struct callout, in6_tmpaddrtimer_ch);
85 #define V_in6_tmpaddrtimer_ch VNET(in6_tmpaddrtimer_ch)
87 VNET_DECLARE(struct inpcbinfo, ripcbinfo);
88 #define V_ripcbinfo VNET(ripcbinfo)
90 static int get_rand_ifid(struct ifnet *, struct in6_addr *);
91 static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *);
92 static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *);
93 static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *);
94 static int in6_ifattach_loopback(struct ifnet *);
95 static void in6_purgemaddrs(struct ifnet *);
97 #define EUI64_GBIT 0x01
98 #define EUI64_UBIT 0x02
99 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
100 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
101 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
102 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
103 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
105 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
106 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
109 * Generate a last-resort interface identifier, when the machine has no
110 * IEEE802/EUI64 address sources.
111 * The goal here is to get an interface identifier that is
112 * (1) random enough and (2) does not change across reboot.
113 * We currently use MD5(hostname) for it.
115 * in6 - upper 64bits are preserved
118 get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
125 pr = curthread->td_ucred->cr_prison;
126 mtx_lock(&pr->pr_mtx);
127 hostnamelen = strlen(pr->pr_hostname);
129 /* we need at least several letters as seed for ifid */
130 if (hostnamelen < 3) {
131 mtx_unlock(&pr->pr_mtx);
136 /* generate 8 bytes of pseudo-random value. */
137 bzero(&ctxt, sizeof(ctxt));
139 MD5Update(&ctxt, pr->pr_hostname, hostnamelen);
140 mtx_unlock(&pr->pr_mtx);
141 MD5Final(digest, &ctxt);
143 /* assumes sizeof(digest) > sizeof(ifid) */
144 bcopy(digest, &in6->s6_addr[8], 8);
146 /* make sure to set "u" bit to local, and "g" bit to individual. */
147 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
148 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
150 /* convert EUI64 into IPv6 interface identifier */
157 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
160 u_int8_t seed[16], digest[16], nullbuf[8];
163 /* If there's no history, start with a random seed. */
164 bzero(nullbuf, sizeof(nullbuf));
165 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
168 for (i = 0; i < 2; i++) {
169 val32 = arc4random();
170 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
173 bcopy(seed0, seed, 8);
175 /* copy the right-most 64-bits of the given address */
176 /* XXX assumption on the size of IFID */
177 bcopy(seed1, &seed[8], 8);
179 if (0) { /* for debugging purposes only */
182 printf("generate_tmp_ifid: new randomized ID from: ");
183 for (i = 0; i < 16; i++)
184 printf("%02x", seed[i]);
188 /* generate 16 bytes of pseudo-random value. */
189 bzero(&ctxt, sizeof(ctxt));
191 MD5Update(&ctxt, seed, sizeof(seed));
192 MD5Final(digest, &ctxt);
195 * RFC 3041 3.2.1. (3)
196 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
197 * left-most bit is numbered 0) to zero.
199 bcopy(digest, ret, 8);
200 ret[0] &= ~EUI64_UBIT;
203 * XXX: we'd like to ensure that the generated value is not zero
204 * for simplicity. If the caclculated digest happens to be zero,
205 * use a random non-zero value as the last resort.
207 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
209 "generate_tmp_ifid: computed MD5 value is zero.\n"));
211 val32 = arc4random();
212 val32 = 1 + (val32 % (0xffffffff - 1));
216 * RFC 3041 3.2.1. (4)
217 * Take the rightmost 64-bits of the MD5 digest and save them in
218 * stable storage as the history value to be used in the next
219 * iteration of the algorithm.
221 bcopy(&digest[8], seed0, 8);
223 if (0) { /* for debugging purposes only */
227 for (i = 0; i < 16; i++)
228 printf("%02x", digest[i]);
236 * Get interface identifier for the specified interface.
237 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
239 * in6 - upper 64bits are preserved
242 in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
245 struct sockaddr_dl *sdl;
248 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
249 static u_int8_t allone[8] =
250 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
254 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
255 if (ifa->ifa_addr->sa_family != AF_LINK)
257 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
260 if (sdl->sdl_alen == 0)
270 addrlen = sdl->sdl_alen;
273 switch (ifp->if_type) {
279 /* IEEE802/EUI64 cases - what others? */
280 /* IEEE1394 uses 16byte length address starting with EUI64 */
284 /* look at IEEE802/EUI64 only */
285 if (addrlen != 8 && addrlen != 6)
289 * check for invalid MAC address - on bsdi, we see it a lot
290 * since wildboar configures all-zero MAC on pccard before
293 if (bcmp(addr, allzero, addrlen) == 0)
295 if (bcmp(addr, allone, addrlen) == 0)
298 /* make EUI64 address */
300 bcopy(addr, &in6->s6_addr[8], 8);
301 else if (addrlen == 6) {
302 in6->s6_addr[8] = addr[0];
303 in6->s6_addr[9] = addr[1];
304 in6->s6_addr[10] = addr[2];
305 in6->s6_addr[11] = 0xff;
306 in6->s6_addr[12] = 0xfe;
307 in6->s6_addr[13] = addr[3];
308 in6->s6_addr[14] = addr[4];
309 in6->s6_addr[15] = addr[5];
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).
326 bcopy(addr + 12, &in6->s6_addr[8], 8);
333 /* sanity check: g bit must not indicate "group" */
334 if (EUI64_GROUP(in6))
337 /* convert EUI64 into IPv6 interface identifier */
341 * sanity check: ifid must not be all zero, avoid conflict with
342 * subnet router anycast
344 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
345 bcmp(&in6->s6_addr[9], allzero, 7) == 0)
352 * Get interface identifier for the specified interface. If it is not
353 * available on ifp0, borrow interface identifier from other information
356 * altifp - secondary EUI64 source
359 get_ifid(struct ifnet *ifp0, struct ifnet *altifp,
360 struct in6_addr *in6)
366 /* first, try to get it from the interface itself */
367 if (in6_get_hw_ifid(ifp0, in6) == 0) {
368 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
373 /* try secondary EUI64 source. this basically is for ATM PVC */
374 if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
375 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
376 if_name(ifp0), if_name(altifp)));
380 /* next, try to get it from some other hardware interface */
381 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
384 if (in6_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: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
412 if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
413 in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
414 in6->s6_addr[14], in6->s6_addr[15]));
419 * altifp - secondary EUI64 source
422 in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet *altifp)
424 struct in6_ifaddr *ia;
425 struct in6_aliasreq ifra;
426 struct nd_prefixctl pr0;
427 struct epoch_tracker et;
428 struct nd_prefix *pr;
432 * configure link-local address.
434 in6_prepare_ifra(&ifra, NULL, &in6mask64);
436 ifra.ifra_addr.sin6_addr.s6_addr32[0] = htonl(0xfe800000);
437 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
438 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
439 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
440 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
443 error = get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr);
447 "%s: no ifid available\n", if_name(ifp)));
451 if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
454 /* link-local addresses should NEVER expire. */
455 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
456 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
459 * Now call in6_update_ifa() to do a bunch of procedures to configure
460 * a link-local address. We can set the 3rd argument to NULL, because
461 * we know there's no other link-local address on the interface
462 * and therefore we are adding one (instead of updating one).
464 if ((error = in6_update_ifa(ifp, &ifra, NULL,
465 IN6_IFAUPDATE_DADDELAY)) != 0) {
467 * XXX: When the interface does not support IPv6, this call
468 * would fail in the SIOCSIFADDR ioctl. I believe the
469 * notification is rather confusing in this case, so just
470 * suppress it. (jinmei@kame.net 20010130)
472 if (error != EAFNOSUPPORT)
473 nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
474 "configure a link-local address on %s "
476 if_name(ifp), error));
481 ia = in6ifa_ifpforlinklocal(ifp, 0);
485 * Another thread removed the address that we just added.
486 * This should be rare, but it happens.
488 nd6log((LOG_NOTICE, "%s: %s: new link-local address "
489 "disappeared\n", __func__, if_name(ifp)));
492 ifa_free(&ia->ia_ifa);
495 * Make the link-local prefix (fe80::%link/64) as on-link.
496 * Since we'd like to manage prefixes separately from addresses,
497 * we make an ND6 prefix structure for the link-local prefix,
498 * and add it to the prefix list as a never-expire prefix.
499 * XXX: this change might affect some existing code base...
501 bzero(&pr0, sizeof(pr0));
503 /* this should be 64 at this moment. */
504 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
505 pr0.ndpr_prefix = ifra.ifra_addr;
506 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
507 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, &in6mask64);
509 * Initialize parameters. The link-local prefix must always be
510 * on-link, and its lifetimes never expire.
512 pr0.ndpr_raf_onlink = 1;
513 pr0.ndpr_raf_auto = 1; /* probably meaningless */
514 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
515 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
517 * Since there is no other link-local addresses, nd6_prefix_lookup()
518 * probably returns NULL. However, we cannot always expect the result.
519 * For example, if we first remove the (only) existing link-local
520 * address, and then reconfigure another one, the prefix is still
521 * valid with referring to the old link-local address.
523 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
524 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
526 /* Reference prefix */
536 * ifp - must be IFT_LOOP
539 in6_ifattach_loopback(struct ifnet *ifp)
541 struct in6_aliasreq ifra;
544 in6_prepare_ifra(&ifra, &in6addr_loopback, &in6mask128);
547 * Always initialize ia_dstaddr (= broadcast address) to loopback
548 * address. Follows IPv4 practice - see in_ifinit().
550 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
551 ifra.ifra_dstaddr.sin6_family = AF_INET6;
552 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
554 /* the loopback address should NEVER expire. */
555 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
556 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
559 * We are sure that this is a newly assigned address, so we can set
560 * NULL to the 3rd arg.
562 if ((error = in6_update_ifa(ifp, &ifra, NULL, 0)) != 0) {
563 nd6log((LOG_ERR, "in6_ifattach_loopback: failed to configure "
564 "the loopback address on %s (errno=%d)\n",
565 if_name(ifp), error));
573 * compute NI group address, based on the current hostname setting.
576 * when ifp == NULL, the caller is responsible for filling scopeid.
578 * If oldmcprefix == 1, FF02:0:0:0:0:2::/96 is used for NI group address
579 * while it is FF02:0:0:0:0:2:FF00::/104 in RFC 4620.
582 in6_nigroup0(struct ifnet *ifp, const char *name, int namelen,
583 struct in6_addr *in6, int oldmcprefix)
591 char n[64]; /* a single label must not exceed 63 chars */
594 * If no name is given and namelen is -1,
595 * we try to do the hostname lookup ourselves.
597 if (!name && namelen == -1) {
598 pr = curthread->td_ucred->cr_prison;
599 mtx_lock(&pr->pr_mtx);
600 name = pr->pr_hostname;
601 namelen = strlen(name);
604 if (!name || !namelen) {
606 mtx_unlock(&pr->pr_mtx);
611 while (p && *p && *p != '.' && p - name < namelen)
613 if (p == name || p - name > sizeof(n) - 1) {
615 mtx_unlock(&pr->pr_mtx);
616 return -1; /* label too long */
621 mtx_unlock(&pr->pr_mtx);
623 for (q = n; *q; q++) {
624 if ('A' <= *q && *q <= 'Z')
628 /* generate 16 bytes of pseudo-random value. */
629 bzero(&ctxt, sizeof(ctxt));
631 MD5Update(&ctxt, &l, sizeof(l));
632 MD5Update(&ctxt, n, l);
633 MD5Final(digest, &ctxt);
635 bzero(in6, sizeof(*in6));
636 in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
637 in6->s6_addr8[11] = 2;
638 if (oldmcprefix == 0) {
639 in6->s6_addr8[12] = 0xff;
640 /* Copy the first 24 bits of 128-bit hash into the address. */
641 bcopy(digest, &in6->s6_addr8[13], 3);
643 /* Copy the first 32 bits of 128-bit hash into the address. */
644 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
646 if (in6_setscope(in6, ifp, NULL))
647 return (-1); /* XXX: should not fail */
653 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
654 struct in6_addr *in6)
657 return (in6_nigroup0(ifp, name, namelen, in6, 0));
661 in6_nigroup_oldmcprefix(struct ifnet *ifp, const char *name, int namelen,
662 struct in6_addr *in6)
665 return (in6_nigroup0(ifp, name, namelen, in6, 1));
669 * XXX multiple loopback interface needs more care. for instance,
670 * nodelocal address needs to be configured onto only one of them.
671 * XXX multiple link-local address case
673 * altifp - secondary EUI64 source
676 in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
678 struct in6_ifaddr *ia;
680 if (ifp->if_afdata[AF_INET6] == NULL)
683 * quirks based on interface type
685 switch (ifp->if_type) {
688 * 6to4 interface is a very special kind of beast.
689 * no multicast, no linklocal. RFC2529 specifies how to make
690 * linklocals for 6to4 interface, but there's no use and
691 * it is rather harmful to have one.
693 ND_IFINFO(ifp)->flags &= ~ND6_IFF_AUTO_LINKLOCAL;
694 ND_IFINFO(ifp)->flags |= ND6_IFF_NO_DAD;
701 * usually, we require multicast capability to the interface
703 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
704 nd6log((LOG_INFO, "in6_ifattach: "
705 "%s is not multicast capable, IPv6 not enabled\n",
711 * assign loopback address for loopback interface.
713 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
715 * check that loopback address doesn't exist yet.
717 ia = in6ifa_ifwithaddr(&in6addr_loopback, 0, false);
719 in6_ifattach_loopback(ifp);
723 * assign a link-local address, if there's none.
725 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
726 ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL) {
727 struct epoch_tracker et;
730 ia = in6ifa_ifpforlinklocal(ifp, 0);
733 in6_ifattach_linklocal(ifp, altifp);
735 ifa_free(&ia->ia_ifa);
738 /* update dynamically. */
739 if (V_in6_maxmtu < ifp->if_mtu)
740 V_in6_maxmtu = ifp->if_mtu;
744 * NOTE: in6_ifdetach() does not support loopback if at this moment.
746 * When shutting down a VNET we clean up layers top-down. In that case
747 * upper layer protocols (ulp) are cleaned up already and locks are destroyed
748 * and we must not call into these cleanup functions anymore, thus purgeulp
749 * is set to 0 in that case by in6_ifdetach_destroy().
750 * The normal case of destroying a (cloned) interface still needs to cleanup
751 * everything related to the interface and will have purgeulp set to 1.
754 _in6_ifdetach(struct ifnet *ifp, int purgeulp)
756 struct ifaddr *ifa, *next;
758 if (ifp->if_afdata[AF_INET6] == NULL)
762 * nuke any of IPv6 addresses we have
764 CK_STAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
765 if (ifa->ifa_addr->sa_family != AF_INET6)
771 in6_pcbpurgeif0(&V_udbinfo, ifp);
772 in6_pcbpurgeif0(&V_ulitecbinfo, ifp);
773 in6_pcbpurgeif0(&V_ripcbinfo, ifp);
776 /* leave from all multicast groups joined */
777 in6_purgemaddrs(ifp);
780 * Remove neighbor management table.
781 * Enabling the nd6_purge will panic on vmove for interfaces on VNET
782 * teardown as the IPv6 layer is cleaned up already and the locks
790 in6_ifdetach(struct ifnet *ifp)
793 _in6_ifdetach(ifp, 1);
797 in6_ifdetach_destroy(struct ifnet *ifp)
800 _in6_ifdetach(ifp, 0);
804 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf,
805 const u_int8_t *baseid, int generate)
808 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
810 bzero(nullbuf, sizeof(nullbuf));
811 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
812 /* we've never created a random ID. Create a new one. */
817 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
819 /* generate_tmp_ifid will update seedn and buf */
820 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
823 bcopy(ndi->randomid, retbuf, 8);
829 in6_tmpaddrtimer(void *arg)
831 CURVNET_SET((struct vnet *) arg);
832 struct epoch_tracker et;
833 struct nd_ifinfo *ndi;
837 callout_reset(&V_in6_tmpaddrtimer_ch,
838 (V_ip6_temp_preferred_lifetime - V_ip6_desync_factor -
839 V_ip6_temp_regen_advance) * hz, in6_tmpaddrtimer, curvnet);
841 bzero(nullbuf, sizeof(nullbuf));
843 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
844 if (ifp->if_afdata[AF_INET6] == NULL)
846 ndi = ND_IFINFO(ifp);
847 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
849 * We've been generating a random ID on this interface.
852 (void)generate_tmp_ifid(ndi->randomseed0,
853 ndi->randomseed1, ndi->randomid);
861 in6_purgemaddrs(struct ifnet *ifp)
863 struct in6_multi_head inmh;
867 IN6_MULTI_LIST_LOCK();
868 mld_ifdetach(ifp, &inmh);
869 IN6_MULTI_LIST_UNLOCK();
871 in6m_release_list_deferred(&inmh);
874 * Make sure all multicast deletions invoking if_ioctl() are
875 * completed before returning. Else we risk accessing a freed
876 * ifnet structure pointer.
878 in6m_release_wait(NULL);
882 in6_ifattach_destroy(void)
885 callout_drain(&V_in6_tmpaddrtimer_ch);
889 in6_ifattach_init(void *dummy)
892 /* Timer for regeneranation of temporary addresses randomize ID. */
893 callout_init(&V_in6_tmpaddrtimer_ch, 1);
894 callout_reset(&V_in6_tmpaddrtimer_ch,
895 (V_ip6_temp_preferred_lifetime - V_ip6_desync_factor -
896 V_ip6_temp_regen_advance) * hz,
897 in6_tmpaddrtimer, curvnet);
902 * This must be after route_init(), which is now SI_ORDER_THIRD.
904 SYSINIT(in6_ifattach_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE,
905 in6_ifattach_init, NULL);