1 /* $FreeBSD: src/sys/netinet6/in6_ifattach.c,v 1.2.2.6 2002/04/28 05:40:26 suz Exp $ */
2 /* $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/socket.h>
37 #include <sys/sockio.h>
38 #include <sys/kernel.h>
39 #include <sys/syslog.h>
41 #include <sys/thread2.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <net/route.h>
47 #include <net/netisr2.h>
48 #include <net/netmsg2.h>
50 #include <netinet/in.h>
51 #include <netinet/in_var.h>
52 #include <netinet/if_ether.h>
53 #include <netinet/in_pcb.h>
54 #include <netinet/udp_var.h>
56 #include <netinet/ip6.h>
57 #include <netinet6/ip6_var.h>
58 #include <netinet6/in6_var.h>
59 #include <netinet6/in6_pcb.h>
60 #include <netinet6/in6_ifattach.h>
61 #include <netinet6/nd6.h>
62 #include <netinet6/scope6_var.h>
64 #include <net/net_osdep.h>
66 unsigned long in6_maxmtu = 0;
68 #ifdef IP6_AUTO_LINKLOCAL
69 int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
71 int ip6_auto_linklocal = 1; /* enable by default */
74 static struct callout in6_tmpaddrtimer_ch;
75 static struct netmsg_base in6_tmpaddrtimer_netmsg;
77 extern struct inpcbinfo ripcbinfo;
79 static int get_rand_ifid (struct ifnet *, struct in6_addr *);
80 static int generate_tmp_ifid (u_int8_t *, const u_int8_t *, u_int8_t *);
81 static int get_hw_ifid (struct ifnet *, struct in6_addr *);
82 static int get_ifid (struct ifnet *, struct ifnet *, struct in6_addr *);
83 static int in6_ifattach_linklocal (struct ifnet *, struct ifnet *);
84 static int in6_ifattach_loopback (struct ifnet *);
86 #define EUI64_GBIT 0x01
87 #define EUI64_UBIT 0x02
88 #define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
89 #define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
90 #define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
91 #define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
92 #define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
94 #define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
95 #define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
98 * Generate a last-resort interface identifier, when the machine has no
99 * IEEE802/EUI64 address sources.
100 * The goal here is to get an interface identifier that is
101 * (1) random enough and (2) does not change across reboot.
102 * We currently use MD5(hostname) for it.
105 get_rand_ifid(struct ifnet *ifp,
106 struct in6_addr *in6) /* upper 64bits are preserved */
110 int hostnamelen = strlen(hostname);
113 /* we need at least several letters as seed for ifid */
118 /* generate 8 bytes of pseudo-random value. */
119 bzero(&ctxt, sizeof(ctxt));
121 MD5Update(&ctxt, hostname, hostnamelen);
122 MD5Final(digest, &ctxt);
124 /* assumes sizeof(digest) > sizeof(ifid) */
125 bcopy(digest, &in6->s6_addr[8], 8);
127 /* make sure to set "u" bit to local, and "g" bit to individual. */
128 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
129 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
131 /* convert EUI64 into IPv6 interface identifier */
138 generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
141 u_int8_t seed[16], digest[16], nullbuf[8];
145 /* If there's no hisotry, start with a random seed. */
146 bzero(nullbuf, sizeof(nullbuf));
147 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
150 for (i = 0; i < 2; i++) {
152 val32 = krandom() ^ tv.tv_usec;
153 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
156 bcopy(seed0, seed, 8);
159 /* copy the right-most 64-bits of the given address */
160 /* XXX assumption on the size of IFID */
161 bcopy(seed1, &seed[8], 8);
163 if (0) { /* for debugging purposes only */
166 kprintf("generate_tmp_ifid: new randomized ID from: ");
167 for (i = 0; i < 16; i++)
168 kprintf("%02x", seed[i]);
172 /* generate 16 bytes of pseudo-random value. */
173 bzero(&ctxt, sizeof(ctxt));
175 MD5Update(&ctxt, seed, sizeof(seed));
176 MD5Final(digest, &ctxt);
179 * RFC 3041 3.2.1. (3)
180 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
181 * left-most bit is numbered 0) to zero.
183 bcopy(digest, ret, 8);
184 ret[0] &= ~EUI64_UBIT;
187 * XXX: we'd like to ensure that the generated value is not zero
188 * for simplicity. If the caclculated digest happens to be zero,
189 * use a random non-zero value as the last resort.
191 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
193 "generate_tmp_ifid: computed MD5 value is zero.\n");
196 val32 = krandom() ^ tv.tv_usec;
197 val32 = 1 + (val32 % (0xffffffff - 1));
201 * RFC 3041 3.2.1. (4)
202 * Take the rightmost 64-bits of the MD5 digest and save them in
203 * stable storage as the history value to be used in the next
204 * iteration of the algorithm.
206 bcopy(&digest[8], seed0, 8);
208 if (0) { /* for debugging purposes only */
212 for (i = 0; i < 16; i++)
213 kprintf("%02x", digest[i]);
221 * Get interface identifier for the specified interface.
222 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
225 get_hw_ifid(struct ifnet *ifp,
226 struct in6_addr *in6) /* upper 64bits are preserved */
228 struct ifaddr_container *ifac;
229 struct sockaddr_dl *sdl;
232 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
233 static u_int8_t allone[8] =
234 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
236 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
237 struct ifaddr *ifa = ifac->ifa;
239 if (ifa->ifa_addr->sa_family != AF_LINK)
241 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
244 if (sdl->sdl_alen == 0)
254 addrlen = sdl->sdl_alen;
257 switch (ifp->if_type) {
264 /* IEEE802/EUI64 cases - what others? */
265 /* IEEE1394 uses 16byte length address starting with EUI64 */
269 /* look at IEEE802/EUI64 only */
270 if (addrlen != 8 && addrlen != 6)
274 * check for invalid MAC address - on bsdi, we see it a lot
275 * since wildboar configures all-zero MAC on pccard before
278 if (bcmp(addr, allzero, addrlen) == 0)
280 if (bcmp(addr, allone, addrlen) == 0)
283 /* make EUI64 address */
285 bcopy(addr, &in6->s6_addr[8], 8);
286 else if (addrlen == 6) {
287 in6->s6_addr[8] = addr[0];
288 in6->s6_addr[9] = addr[1];
289 in6->s6_addr[10] = addr[2];
290 in6->s6_addr[11] = 0xff;
291 in6->s6_addr[12] = 0xfe;
292 in6->s6_addr[13] = addr[3];
293 in6->s6_addr[14] = addr[4];
294 in6->s6_addr[15] = addr[5];
302 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
303 * however, IPv4 address is not very suitable as unique
304 * identifier source (can be renumbered).
313 /* sanity check: g bit must not indicate "group" */
314 if (EUI64_GROUP(in6))
317 /* convert EUI64 into IPv6 interface identifier */
321 * sanity check: ifid must not be all zero, avoid conflict with
322 * subnet router anycast
324 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
325 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
333 * Get interface identifier for the specified interface. If it is not
334 * available on ifp0, borrow interface identifier from other information
338 get_ifid(struct ifnet *ifp0,
339 struct ifnet *altifp, /* secondary EUI64 source */
340 struct in6_addr *in6)
344 /* first, try to get it from the interface itself */
345 if (get_hw_ifid(ifp0, in6) == 0) {
346 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
351 /* try secondary EUI64 source. this basically is for ATM PVC */
352 if (altifp && get_hw_ifid(altifp, in6) == 0) {
353 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
354 if_name(ifp0), if_name(altifp)));
358 /* next, try to get it from some other hardware interface */
359 TAILQ_FOREACH(ifp, &ifnet, if_list) {
362 if (get_hw_ifid(ifp, in6) != 0)
366 * to borrow ifid from other interface, ifid needs to be
369 if (IFID_UNIVERSAL(in6)) {
371 "%s: borrow interface identifier from %s\n",
372 if_name(ifp0), if_name(ifp)));
377 /* last resort: get from random number source */
378 if (get_rand_ifid(ifp, in6) == 0) {
380 "%s: interface identifier generated by random number\n",
385 kprintf("%s: failed to get interface identifier\n", if_name(ifp0));
389 nd6log((LOG_INFO, "%s: ifid: "
390 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
392 in6->s6_addr[8], in6->s6_addr[9],
393 in6->s6_addr[10], in6->s6_addr[11],
394 in6->s6_addr[12], in6->s6_addr[13],
395 in6->s6_addr[14], in6->s6_addr[15]));
400 in6_ifattach_linklocal(struct ifnet *ifp,
401 struct ifnet *altifp) /* secondary EUI64 source */
403 struct in6_ifaddr *ia;
404 struct in6_aliasreq ifra;
405 struct nd_prefix pr0;
409 * configure link-local address.
411 bzero(&ifra, sizeof(ifra));
414 * in6_update_ifa() does not use ifra_name, but we accurately set it
417 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
419 ifra.ifra_addr.sin6_family = AF_INET6;
420 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
421 ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80);
422 ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */
423 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
424 if (ifp->if_flags & IFF_LOOPBACK) {
425 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
426 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
428 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
430 "%s: no ifid available\n", if_name(ifp)));
435 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
436 ifra.ifra_prefixmask.sin6_family = AF_INET6;
437 ifra.ifra_prefixmask.sin6_addr = in6mask64;
439 /* link-local addresses should NEVER expire. */
440 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
441 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
444 * Do not let in6_update_ifa() do DAD, since we need a random delay
445 * before sending an NS at the first time the interface becomes up.
446 * Instead, in6_if_up() will start DAD with a proper random delay.
448 ifra.ifra_flags |= IN6_IFF_NODAD;
451 * Now call in6_update_ifa() to do a bunch of procedures to configure
452 * a link-local address. We can set NULL to the 3rd argument, because
453 * we know there's no other link-local address on the interface
454 * and therefore we are adding one (instead of updating one).
456 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
458 * XXX: When the interface does not support IPv6, this call
459 * would fail in the SIOCSIFADDR ioctl. I believe the
460 * notification is rather confusing in this case, so just
461 * supress it. (jinmei@kame.net 20010130)
463 if (error != EAFNOSUPPORT)
464 log(LOG_NOTICE, "in6_ifattach_linklocal: failed to "
465 "configure a link-local address on %s "
467 if_name(ifp), error);
472 * Adjust ia6_flags so that in6_if_up will perform DAD.
473 * XXX: Some P2P interfaces seem not to send packets just after
474 * becoming up, so we skip p2p interfaces for safety.
476 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
479 panic("ia == NULL in in6_ifattach_linklocal");
483 if (in6if_do_dad(ifp) && !(ifp->if_flags & IFF_POINTOPOINT)) {
484 ia->ia6_flags &= ~IN6_IFF_NODAD;
485 ia->ia6_flags |= IN6_IFF_TENTATIVE;
489 * Make the link-local prefix (fe80::/64%link) as on-link.
490 * Since we'd like to manage prefixes separately from addresses,
491 * we make an ND6 prefix structure for the link-local prefix,
492 * and add it to the prefix list as a never-expire prefix.
493 * XXX: this change might affect some existing code base...
495 bzero(&pr0, sizeof(pr0));
497 /* this should be 64 at this moment. */
498 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
499 pr0.ndpr_mask = ifra.ifra_prefixmask.sin6_addr;
500 pr0.ndpr_prefix = ifra.ifra_addr;
501 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
502 for (i = 0; i < 4; i++) {
503 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
504 in6mask64.s6_addr32[i];
507 * Initialize parameters. The link-local prefix must always be
508 * on-link, and its lifetimes never expire.
510 pr0.ndpr_raf_onlink = 1;
511 pr0.ndpr_raf_auto = 1; /* probably meaningless */
512 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
513 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
515 * Since there is no other link-local addresses, nd6_prefix_lookup()
516 * probably returns NULL. However, we cannot always expect the result.
517 * For example, if we first remove the (only) existing link-local
518 * address, and then reconfigure another one, the prefix is still
519 * valid with referring to the old link-local address.
521 if (nd6_prefix_lookup(&pr0) == NULL) {
522 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
530 in6_ifattach_loopback(struct ifnet *ifp) /* must be IFT_LOOP */
532 struct in6_aliasreq ifra;
535 bzero(&ifra, sizeof(ifra));
538 * in6_update_ifa() does not use ifra_name, but we accurately set it
541 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
543 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
544 ifra.ifra_prefixmask.sin6_family = AF_INET6;
545 ifra.ifra_prefixmask.sin6_addr = in6mask128;
548 * Always initialize ia_dstaddr (= broadcast address) to loopback
549 * address. Follows IPv4 practice - see in_ifinit().
551 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
552 ifra.ifra_dstaddr.sin6_family = AF_INET6;
553 ifra.ifra_dstaddr.sin6_addr = kin6addr_loopback;
555 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
556 ifra.ifra_addr.sin6_family = AF_INET6;
557 ifra.ifra_addr.sin6_addr = kin6addr_loopback;
559 /* the loopback address should NEVER expire. */
560 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
561 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
563 /* we don't need to perform DAD on loopback interfaces. */
564 ifra.ifra_flags |= IN6_IFF_NODAD;
566 /* skip registration to the prefix list. XXX should be temporary. */
567 ifra.ifra_flags |= IN6_IFF_NOPFX;
570 * We are sure that this is a newly assigned address, so we can set
571 * NULL to the 3rd arg.
573 if ((error = in6_update_ifa(ifp, &ifra, NULL)) != 0) {
574 log(LOG_ERR, "in6_ifattach_loopback: failed to configure "
575 "the loopback address on %s (errno=%d)\n",
576 if_name(ifp), error);
584 * compute NI group address, based on the current hostname setting.
585 * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later).
587 * when ifp == NULL, the caller is responsible for filling scopeid.
590 in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
591 struct in6_addr *in6)
598 char n[64]; /* a single label must not exceed 63 chars */
600 if (!namelen || !name)
604 while (p && *p && *p != '.' && p - name < namelen)
606 if (p - name > sizeof(n) - 1)
607 return -1; /* label too long */
611 for (q = n; *q; q++) {
612 if ('A' <= *q && *q <= 'Z')
616 /* generate 8 bytes of pseudo-random value. */
617 bzero(&ctxt, sizeof(ctxt));
619 MD5Update(&ctxt, &l, sizeof(l));
620 MD5Update(&ctxt, n, l);
621 MD5Final(digest, &ctxt);
623 bzero(in6, sizeof(*in6));
624 in6->s6_addr16[0] = htons(0xff02);
626 in6->s6_addr16[1] = htons(ifp->if_index);
627 in6->s6_addr8[11] = 2;
628 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
633 struct netmsg_nigroup {
634 struct netmsg_base nmsg;
640 in6_nigroup_attach_dispatch(netmsg_t msg)
642 struct netmsg_nigroup *nmsg = (struct netmsg_nigroup *)msg;
644 struct sockaddr_in6 mltaddr;
645 struct in6_multi *in6m;
648 bzero(&mltaddr, sizeof(mltaddr));
649 mltaddr.sin6_family = AF_INET6;
650 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
651 if (in6_nigroup(NULL, nmsg->name, nmsg->namelen,
652 &mltaddr.sin6_addr) != 0)
655 TAILQ_FOREACH(ifp, &ifnet, if_list) {
656 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
657 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
659 if (!in6_addmulti(&mltaddr.sin6_addr, ifp, &error)) {
660 nd6log((LOG_ERR, "%s: failed to join %s "
661 "(errno=%d)\n", if_name(ifp),
662 ip6_sprintf(&mltaddr.sin6_addr),
668 lwkt_replymsg(&nmsg->nmsg.lmsg, 0);
672 in6_nigroup_attach(const char *name, int namelen)
674 struct netmsg_nigroup nmsg;
676 netmsg_init(&nmsg.nmsg, NULL, &curthread->td_msgport, 0,
677 in6_nigroup_attach_dispatch);
679 nmsg.namelen = namelen;
680 lwkt_domsg(netisr_cpuport(0), &nmsg.nmsg.lmsg, 0);
684 in6_nigroup_detach_dispatch(netmsg_t msg)
686 struct netmsg_nigroup *nmsg = (struct netmsg_nigroup *)msg;
688 struct sockaddr_in6 mltaddr;
689 struct in6_multi *in6m;
691 bzero(&mltaddr, sizeof(mltaddr));
692 mltaddr.sin6_family = AF_INET6;
693 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
694 if (in6_nigroup(NULL, nmsg->name, nmsg->namelen,
695 &mltaddr.sin6_addr) != 0)
698 TAILQ_FOREACH(ifp, &ifnet, if_list) {
699 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
700 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
705 lwkt_replymsg(&nmsg->nmsg.lmsg, 0);
709 in6_nigroup_detach(const char *name, int namelen)
711 struct netmsg_nigroup nmsg;
713 netmsg_init(&nmsg.nmsg, NULL, &curthread->td_msgport, 0,
714 in6_nigroup_detach_dispatch);
716 nmsg.namelen = namelen;
717 lwkt_domsg(netisr_cpuport(0), &nmsg.nmsg.lmsg, 0);
721 * XXX multiple loopback interface needs more care. for instance,
722 * nodelocal address needs to be configured onto only one of them.
723 * XXX multiple link-local address case
726 in6_ifattach(struct ifnet *ifp,
727 struct ifnet *altifp) /* secondary EUI64 source */
729 struct in6_ifaddr *ia;
732 /* some of the interfaces are inherently not IPv6 capable */
733 switch (ifp->if_type) {
734 #ifdef IFT_BRIDGE /*OpenBSD 2.8*/
745 * quirks based on interface type
747 switch (ifp->if_type) {
751 * 6to4 interface is a very special kind of beast.
752 * no multicast, no linklocal. RFC2529 specifies how to make
753 * linklocals for 6to4 interface, but there's no use and
754 * it is rather harmful to have one.
763 * usually, we require multicast capability to the interface
765 if (!(ifp->if_flags & IFF_MULTICAST)) {
766 log(LOG_INFO, "in6_ifattach: "
767 "%s is not multicast capable, IPv6 not enabled\n",
773 * assign loopback address for loopback interface.
774 * XXX multiple loopback interface case.
776 if (ifp->if_flags & IFF_LOOPBACK) {
777 in6 = kin6addr_loopback;
778 if (in6ifa_ifpwithaddr(ifp, &in6) == NULL) {
779 if (in6_ifattach_loopback(ifp) != 0)
785 * assign a link-local address, if there's none.
787 if (ip6_auto_linklocal) {
788 ia = in6ifa_ifpforlinklocal(ifp, 0);
790 if (in6_ifattach_linklocal(ifp, altifp) == 0) {
791 /* linklocal address assigned */
793 /* failed to assign linklocal address. bark? */
798 #ifdef IFT_STF /* XXX */
802 /* update dynamically. */
803 if (in6_maxmtu < ifp->if_mtu)
804 in6_maxmtu = ifp->if_mtu;
808 * NOTE: in6_ifdetach() does not support loopback if at this moment.
811 in6_ifdetach_dispatch(netmsg_t nmsg)
813 struct lwkt_msg *lmsg = &nmsg->lmsg;
814 struct ifnet *ifp = lmsg->u.ms_resultp;
815 struct ifaddr_container *ifac, *next;
817 struct sockaddr_in6 sin6;
818 struct in6_multi *in6m, *in6m_next;
820 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
823 /* remove neighbor management table */
826 /* nuke any of IPv6 addresses we have */
827 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], ifa_link, next) {
828 struct ifaddr *ifa = ifac->ifa;
830 if (ifa->ifa_addr->sa_family != AF_INET6)
837 * These were code trying to nuke inet6 addresses again, but all
838 * inet6 addresses must have been deleted above; use assertion.
840 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
841 KASSERT(ifac->ifa->ifa_addr->sa_family != AF_INET6,
842 ("still has inet6 addr"));
845 /* leave from all multicast groups joined */
846 in6_pcbpurgeif0(&ripcbinfo, ifp);
847 in6_pcbpurgeif0(&udbinfo[0], ifp);
848 for (in6m = LIST_FIRST(&in6_multihead); in6m; in6m = in6m_next) {
849 in6m_next = LIST_NEXT(in6m, in6m_entry);
850 if (in6m->in6m_ifp != ifp)
857 * remove neighbor management table. we call it twice just to make
858 * sure we nuke everything. maybe we need just one call.
859 * XXX: since the first call did not release addresses, some prefixes
860 * might remain. We should call nd6_purge() again to release the
861 * prefixes after removing all addresses above.
862 * (Or can we just delay calling nd6_purge until at this point?)
866 /* remove route to link-local allnodes multicast (ff02::1) */
867 bzero(&sin6, sizeof(sin6));
868 sin6.sin6_len = sizeof(struct sockaddr_in6);
869 sin6.sin6_family = AF_INET6;
870 sin6.sin6_addr = kin6addr_linklocal_allnodes;
871 sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
872 rt = rtpurelookup((struct sockaddr *)&sin6);
873 if (rt != NULL && rt->rt_ifp == ifp) {
875 rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt),
876 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
879 lwkt_replymsg(lmsg, 0);
883 in6_ifdetach(struct ifnet *ifp)
885 struct netmsg_base nmsg;
886 struct lwkt_msg *lmsg = &nmsg.lmsg;
888 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0,
889 in6_ifdetach_dispatch);
890 lmsg->u.ms_resultp = ifp;
891 lwkt_domsg(netisr_cpuport(0), lmsg, 0);
895 in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf, const u_int8_t *baseid,
899 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
901 bzero(nullbuf, sizeof(nullbuf));
902 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
903 /* we've never created a random ID. Create a new one. */
908 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
910 /* generate_tmp_ifid will update seedn and buf */
911 generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
914 bcopy(ndi->randomid, retbuf, 8);
918 in6_tmpaddrtimer(void *arg __unused)
920 struct lwkt_msg *lmsg = &in6_tmpaddrtimer_netmsg.lmsg;
922 KASSERT(mycpuid == 0, ("not on cpu0"));
924 if (lmsg->ms_flags & MSGF_DONE)
925 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg);
930 in6_tmpaddrtimer_dispatch(netmsg_t nmsg)
932 struct nd_ifinfo *ndi;
936 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
940 lwkt_replymsg(&nmsg->lmsg, 0); /* reply ASAP */
943 bzero(nullbuf, sizeof(nullbuf));
944 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) {
945 if (ifp->if_afdata[AF_INET6] == NULL)
947 ndi = ND_IFINFO(ifp);
948 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
950 * We've been generating a random ID on this interface.
953 generate_tmp_ifid(ndi->randomseed0,
959 callout_reset(&in6_tmpaddrtimer_ch,
960 (ip6_temp_preferred_lifetime - ip6_desync_factor -
961 ip6_temp_regen_advance) * hz,
962 in6_tmpaddrtimer, NULL);
966 * Timer for regeneranation of temporary addresses randomize ID
969 in6_tmpaddrtimer_init(void)
971 callout_init_mp(&in6_tmpaddrtimer_ch);
972 netmsg_init(&in6_tmpaddrtimer_netmsg, NULL, &netisr_adone_rport,
973 MSGF_PRIORITY, in6_tmpaddrtimer_dispatch);
975 lwkt_sendmsg(netisr_cpuport(0), &in6_tmpaddrtimer_netmsg.lmsg);