1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6.c,v 1.30 2008/10/03 07:59:20 hasso Exp $ */
3 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi 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
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66 * @(#)in.c 8.2 (Berkeley) 11/15/93
70 #include "opt_inet6.h"
72 #include <sys/param.h>
73 #include <sys/errno.h>
74 #include <sys/malloc.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/sockio.h>
78 #include <sys/systm.h>
82 #include <sys/kernel.h>
83 #include <sys/syslog.h>
84 #include <sys/thread2.h>
87 #include <net/if_types.h>
88 #include <net/route.h>
89 #include <net/if_dl.h>
91 #include <netinet/in.h>
92 #include <netinet/in_var.h>
93 #include <netinet/if_ether.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/ip.h>
96 #include <netinet/in_pcb.h>
98 #include <netinet/ip6.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet6/mld6_var.h>
102 #include <netinet6/ip6_mroute.h>
103 #include <netinet6/in6_ifattach.h>
104 #include <netinet6/scope6_var.h>
105 #include <netinet6/in6_pcb.h>
106 #include <netinet6/in6_var.h>
108 #include <net/net_osdep.h>
111 * Definitions of some costant IP6 addresses.
113 const struct in6_addr kin6addr_any = IN6ADDR_ANY_INIT;
114 const struct in6_addr kin6addr_loopback = IN6ADDR_LOOPBACK_INIT;
115 const struct in6_addr kin6addr_nodelocal_allnodes =
116 IN6ADDR_NODELOCAL_ALLNODES_INIT;
117 const struct in6_addr kin6addr_linklocal_allnodes =
118 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
119 const struct in6_addr kin6addr_linklocal_allrouters =
120 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
122 const struct in6_addr in6mask0 = IN6MASK0;
123 const struct in6_addr in6mask32 = IN6MASK32;
124 const struct in6_addr in6mask64 = IN6MASK64;
125 const struct in6_addr in6mask96 = IN6MASK96;
126 const struct in6_addr in6mask128 = IN6MASK128;
128 const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6,
129 0, 0, IN6ADDR_ANY_INIT, 0};
131 static int in6_lifaddr_ioctl (struct socket *, u_long, caddr_t,
132 struct ifnet *, struct thread *);
133 static int in6_ifinit (struct ifnet *, struct in6_ifaddr *,
134 struct sockaddr_in6 *, int);
135 static void in6_unlink_ifa (struct in6_ifaddr *, struct ifnet *);
136 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo *, struct rtentry *, void *);
138 struct in6_multihead in6_multihead; /* XXX BSS initialization */
140 int (*faithprefix_p)(struct in6_addr *);
143 * Subroutine for in6_ifaddloop() and in6_ifremloop().
144 * This routine does actual work.
147 in6_ifloop_request(int cmd, struct ifaddr *ifa)
149 struct sockaddr_in6 all1_sa;
150 struct rt_addrinfo rtinfo;
153 bzero(&all1_sa, sizeof(all1_sa));
154 all1_sa.sin6_family = AF_INET6;
155 all1_sa.sin6_len = sizeof(struct sockaddr_in6);
156 all1_sa.sin6_addr = in6mask128;
159 * We specify the address itself as the gateway, and set the
160 * RTF_LLINFO flag, so that the corresponding host route would have
161 * the flag, and thus applications that assume traditional behavior
162 * would be happy. Note that we assume the caller of the function
163 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
164 * which changes the outgoing interface to the loopback interface.
166 bzero(&rtinfo, sizeof(struct rt_addrinfo));
167 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr;
168 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
169 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa;
170 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO;
172 error = rtrequest1_global(cmd, &rtinfo,
173 in6_ifloop_request_callback, ifa);
175 log(LOG_ERR, "in6_ifloop_request: "
176 "%s operation failed for %s (errno=%d)\n",
177 cmd == RTM_ADD ? "ADD" : "DELETE",
178 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
184 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
185 struct rtentry *rt, void *arg)
187 struct ifaddr *ifa = arg;
193 * Make sure rt_ifa be equal to IFA, the second argument of the
195 * We need this because when we refer to rt_ifa->ia6_flags in
196 * ip6_input, we assume that the rt_ifa points to the address instead
197 * of the loopback address.
199 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) {
208 * Report the addition/removal of the address to the routing socket.
209 * XXX: since we called rtinit for a p2p interface with a destination,
210 * we end up reporting twice in such a case. Should we rather
211 * omit the second report?
215 rt_newaddrmsg(cmd, ifa, error, rt);
216 if (cmd == RTM_DELETE) {
217 if (rt->rt_refcnt == 0) {
224 /* no way to return any new error */
229 * Add ownaddr as loopback rtentry. We previously add the route only if
230 * necessary (ex. on a p2p link). However, since we now manage addresses
231 * separately from prefixes, we should always add the route. We can't
232 * rely on the cloning mechanism from the corresponding interface route
236 in6_ifaddloop(struct ifaddr *ifa)
240 /* If there is no loopback entry, allocate one. */
241 rt = rtpurelookup(ifa->ifa_addr);
242 if (rt == NULL || !(rt->rt_flags & RTF_HOST) ||
243 !(rt->rt_ifp->if_flags & IFF_LOOPBACK))
244 in6_ifloop_request(RTM_ADD, ifa);
250 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
254 in6_ifremloop(struct ifaddr *ifa)
256 struct in6_ifaddr *ia;
261 * Some of BSD variants do not remove cloned routes
262 * from an interface direct route, when removing the direct route
263 * (see comments in net/net_osdep.h). Even for variants that do remove
264 * cloned routes, they could fail to remove the cloned routes when
265 * we handle multple addresses that share a common prefix.
266 * So, we should remove the route corresponding to the deleted address
267 * regardless of the result of in6_is_ifloop_auto().
271 * Delete the entry only if exact one ifa exists. More than one ifa
272 * can exist if we assign a same single address to multiple
273 * (probably p2p) interfaces.
274 * XXX: we should avoid such a configuration in IPv6...
276 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
277 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
286 * Before deleting, check if a corresponding loopbacked host
287 * route surely exists. With this check, we can avoid to
288 * delete an interface direct route whose destination is same
289 * as the address being removed. This can happen when remofing
290 * a subnet-router anycast address on an interface attahced
291 * to a shared medium.
293 rt = rtpurelookup(ifa->ifa_addr);
294 if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
295 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
297 in6_ifloop_request(RTM_DELETE, ifa);
303 in6_ifindex2scopeid(int idx)
306 struct sockaddr_in6 *sin6;
307 struct ifaddr_container *ifac;
309 if (idx < 0 || if_index < idx)
311 ifp = ifindex2ifnet[idx];
313 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link)
315 struct ifaddr *ifa = ifac->ifa;
317 if (ifa->ifa_addr->sa_family != AF_INET6)
319 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
320 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
321 return sin6->sin6_scope_id & 0xffff;
328 in6_mask2len(struct in6_addr *mask, u_char *lim0)
331 u_char *lim = lim0, *p;
334 lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */
335 lim = (u_char *)mask + sizeof(*mask);
336 for (p = (u_char *)mask; p < lim; x++, p++) {
342 for (y = 0; y < 8; y++) {
343 if ((*p & (0x80 >> y)) == 0)
349 * when the limit pointer is given, do a stricter check on the
353 if (y != 0 && (*p & (0x00ff >> y)) != 0)
355 for (p = p + 1; p < lim; p++)
364 in6_len2mask(struct in6_addr *mask, int len)
368 bzero(mask, sizeof(*mask));
369 for (i = 0; i < len / 8; i++)
370 mask->s6_addr8[i] = 0xff;
372 mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff;
375 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
376 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
379 in6_control(struct socket *so, u_long cmd, caddr_t data,
380 struct ifnet *ifp, struct thread *td)
382 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
383 struct in6_ifaddr *ia = NULL;
384 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
389 if (priv_check(td, PRIV_ROOT) == 0)
393 case SIOCGETSGCNT_IN6:
394 case SIOCGETMIFCNT_IN6:
395 return (mrt6_ioctl(cmd, data));
399 case SIOCAADDRCTL_POLICY:
400 case SIOCDADDRCTL_POLICY:
403 return (in6_src_ioctl(cmd, data));
410 case SIOCSNDFLUSH_IN6:
411 case SIOCSPFXFLUSH_IN6:
412 case SIOCSRTRFLUSH_IN6:
413 case SIOCSDEFIFACE_IN6:
414 case SIOCSIFINFO_FLAGS:
418 case OSIOCGIFINFO_IN6:
419 case SIOCGIFINFO_IN6:
422 case SIOCGNBRINFO_IN6:
423 case SIOCGDEFIFACE_IN6:
424 return (nd6_ioctl(cmd, data, ifp));
428 case SIOCSIFPREFIX_IN6:
429 case SIOCDIFPREFIX_IN6:
430 case SIOCAIFPREFIX_IN6:
431 case SIOCCIFPREFIX_IN6:
432 case SIOCSGIFPREFIX_IN6:
433 case SIOCGIFPREFIX_IN6:
435 "prefix ioctls are now invalidated. "
436 "please use ifconfig.\n");
444 return (scope6_set(ifp,
445 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
448 return (scope6_get(ifp,
449 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
452 return (scope6_get_default((struct scope6_id *)
453 ifr->ifr_ifru.ifru_scope_id));
464 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
468 * Find address for this interface, if it exists.
470 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
471 struct sockaddr_in6 *sa6 =
472 (struct sockaddr_in6 *)&ifra->ifra_addr;
474 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
475 if (sa6->sin6_addr.s6_addr16[1] == 0) {
476 /* link ID is not embedded by the user */
477 sa6->sin6_addr.s6_addr16[1] =
478 htons(ifp->if_index);
479 } else if (sa6->sin6_addr.s6_addr16[1] !=
480 htons(ifp->if_index)) {
481 return (EINVAL); /* link ID contradicts */
483 if (sa6->sin6_scope_id) {
484 if (sa6->sin6_scope_id !=
485 (u_int32_t)ifp->if_index)
487 sa6->sin6_scope_id = 0; /* XXX: good way? */
490 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
494 case SIOCSIFADDR_IN6:
495 case SIOCSIFDSTADDR_IN6:
496 case SIOCSIFNETMASK_IN6:
498 * Since IPv6 allows a node to assign multiple addresses
499 * on a single interface, SIOCSIFxxx ioctls are not suitable
500 * and should be unused.
502 /* we decided to obsolete this command (20000704) */
505 case SIOCDIFADDR_IN6:
507 * for IPv4, we look for existing in_ifaddr here to allow
508 * "ifconfig if0 delete" to remove first IPv4 address on the
509 * interface. For IPv6, as the spec allow multiple interface
510 * address from the day one, we consider "remove the first one"
511 * semantics to be not preferable.
514 return (EADDRNOTAVAIL);
516 case SIOCAIFADDR_IN6:
518 * We always require users to specify a valid IPv6 address for
519 * the corresponding operation.
521 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
522 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
523 return (EAFNOSUPPORT);
529 case SIOCGIFADDR_IN6:
530 /* This interface is basically deprecated. use SIOCGIFCONF. */
532 case SIOCGIFAFLAG_IN6:
533 case SIOCGIFNETMASK_IN6:
534 case SIOCGIFDSTADDR_IN6:
535 case SIOCGIFALIFETIME_IN6:
536 /* must think again about its semantics */
538 return (EADDRNOTAVAIL);
540 case SIOCSIFALIFETIME_IN6:
542 struct in6_addrlifetime *lt;
547 return (EADDRNOTAVAIL);
548 /* sanity for overflow - beware unsigned */
549 lt = &ifr->ifr_ifru.ifru_lifetime;
550 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
551 && lt->ia6t_vltime + time_second < time_second) {
554 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
555 && lt->ia6t_pltime + time_second < time_second) {
564 case SIOCGIFADDR_IN6:
565 ifr->ifr_addr = ia->ia_addr;
568 case SIOCGIFDSTADDR_IN6:
569 if (!(ifp->if_flags & IFF_POINTOPOINT))
572 * XXX: should we check if ifa_dstaddr is NULL and return
575 ifr->ifr_dstaddr = ia->ia_dstaddr;
578 case SIOCGIFNETMASK_IN6:
579 ifr->ifr_addr = ia->ia_prefixmask;
582 case SIOCGIFAFLAG_IN6:
583 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
586 case SIOCGIFSTAT_IN6:
589 bzero(&ifr->ifr_ifru.ifru_stat,
590 sizeof(ifr->ifr_ifru.ifru_stat));
591 ifr->ifr_ifru.ifru_stat =
592 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
595 case SIOCGIFSTAT_ICMP6:
596 bzero(&ifr->ifr_ifru.ifru_stat,
597 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
598 ifr->ifr_ifru.ifru_icmp6stat =
599 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
602 case SIOCGIFALIFETIME_IN6:
603 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
606 case SIOCSIFALIFETIME_IN6:
607 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
609 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
610 ia->ia6_lifetime.ia6t_expire =
611 time_second + ia->ia6_lifetime.ia6t_vltime;
613 ia->ia6_lifetime.ia6t_expire = 0;
614 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
615 ia->ia6_lifetime.ia6t_preferred =
616 time_second + ia->ia6_lifetime.ia6t_pltime;
618 ia->ia6_lifetime.ia6t_preferred = 0;
621 case SIOCAIFADDR_IN6:
623 int i, error = 0, iaIsNew;
624 struct nd_prefix pr0, *pr;
632 * first, make or update the interface address structure,
633 * and link it to the list.
635 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
639 * then, make the prefix on-link on the interface.
640 * XXX: we'd rather create the prefix before the address, but
641 * we need at least one address to install the corresponding
642 * interface route, so we configure the address first.
646 * convert mask to prefix length (prefixmask has already
647 * been validated in in6_update_ifa().
649 bzero(&pr0, sizeof(pr0));
651 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
653 if (pr0.ndpr_plen == 128)
654 break; /* we don't need to install a host route. */
655 pr0.ndpr_prefix = ifra->ifra_addr;
656 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
657 /* apply the mask for safety. */
658 for (i = 0; i < 4; i++) {
659 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
660 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
663 * XXX: since we don't have an API to set prefix (not address)
664 * lifetimes, we just use the same lifetimes as addresses.
665 * The (temporarily) installed lifetimes can be overridden by
666 * later advertised RAs (when accept_rtadv is non 0), which is
667 * an intended behavior.
669 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
671 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
672 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
673 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
675 /* add the prefix if there's one. */
676 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
678 * nd6_prelist_add will install the corresponding
681 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
684 log(LOG_ERR, "nd6_prelist_add succeeded but "
686 return (EINVAL); /* XXX panic here? */
689 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
691 /* XXX: this should not happen! */
692 log(LOG_ERR, "in6_control: addition succeeded, but"
695 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
696 ia->ia6_ndpr == NULL) { /* new autoconfed addr */
701 * If this is the first autoconf address from
702 * the prefix, create a temporary address
703 * as well (when specified).
705 if (ip6_use_tempaddr &&
706 pr->ndpr_refcnt == 1) {
708 if ((e = in6_tmpifadd(ia, 1)) != 0) {
709 log(LOG_NOTICE, "in6_control: "
710 "failed to create a "
711 "temporary address, "
719 * this might affect the status of autoconfigured
720 * addresses, that is, this address might make
721 * other addresses detached.
723 pfxlist_onlink_check();
725 if (error == 0 && ia) {
726 EVENTHANDLER_INVOKE(ifaddr_event, ifp,
727 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE,
733 case SIOCDIFADDR_IN6:
736 struct nd_prefix pr0, *pr;
739 * If the address being deleted is the only one that owns
740 * the corresponding prefix, expire the prefix as well.
741 * XXX: theoretically, we don't have to warry about such
742 * relationship, since we separate the address management
743 * and the prefix management. We do this, however, to provide
744 * as much backward compatibility as possible in terms of
745 * the ioctl operation.
747 bzero(&pr0, sizeof(pr0));
749 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
751 if (pr0.ndpr_plen == 128)
753 pr0.ndpr_prefix = ia->ia_addr;
754 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
755 for (i = 0; i < 4; i++) {
756 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
757 ia->ia_prefixmask.sin6_addr.s6_addr32[i];
760 * The logic of the following condition is a bit complicated.
761 * We expire the prefix when
762 * 1. the address obeys autoconfiguration and it is the
763 * only owner of the associated prefix, or
764 * 2. the address does not obey autoconf and there is no
765 * other owner of the prefix.
767 if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
768 (((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
769 pr->ndpr_refcnt == 1) ||
770 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) &&
771 pr->ndpr_refcnt == 0))) {
772 pr->ndpr_expire = 1; /* XXX: just for expiration */
776 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE,
778 in6_purgeaddr(&ia->ia_ifa);
783 if (ifp == NULL || ifp->if_ioctl == 0)
785 lwkt_serialize_enter(ifp->if_serializer);
786 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
787 lwkt_serialize_exit(ifp->if_serializer);
795 * Update parameters of an IPv6 interface address.
796 * If necessary, a new entry is created and linked into address chains.
797 * This function is separated from in6_control().
798 * XXX: should this be performed under splnet()?
801 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
802 struct in6_ifaddr *ia)
804 int error = 0, hostIsNew = 0, plen = -1;
805 struct in6_ifaddr *oia;
806 struct sockaddr_in6 dst6;
807 struct in6_addrlifetime *lt;
809 /* Validate parameters */
810 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
814 * The destination address for a p2p link must have a family
815 * of AF_UNSPEC or AF_INET6.
817 if ((ifp->if_flags & IFF_POINTOPOINT) &&
818 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
819 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
820 return (EAFNOSUPPORT);
822 * validate ifra_prefixmask. don't check sin6_family, netmask
823 * does not carry fields other than sin6_len.
825 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
828 * Because the IPv6 address architecture is classless, we require
829 * users to specify a (non 0) prefix length (mask) for a new address.
830 * We also require the prefix (when specified) mask is valid, and thus
831 * reject a non-consecutive mask.
833 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
835 if (ifra->ifra_prefixmask.sin6_len != 0) {
836 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
837 (u_char *)&ifra->ifra_prefixmask +
838 ifra->ifra_prefixmask.sin6_len);
844 * In this case, ia must not be NULL. We just use its prefix
847 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
850 * If the destination address on a p2p interface is specified,
851 * and the address is a scoped one, validate/set the scope
854 dst6 = ifra->ifra_dstaddr;
855 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
856 (dst6.sin6_family == AF_INET6)) {
859 if ((error = in6_recoverscope(&dst6,
860 &ifra->ifra_dstaddr.sin6_addr,
863 scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
864 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
865 dst6.sin6_scope_id = scopeid;
866 else if (dst6.sin6_scope_id != scopeid)
867 return (EINVAL); /* scope ID mismatch. */
868 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
871 dst6.sin6_scope_id = 0; /* XXX */
874 * The destination address can be specified only for a p2p or a
875 * loopback interface. If specified, the corresponding prefix length
878 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
879 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
880 /* XXX: noisy message */
881 log(LOG_INFO, "in6_update_ifa: a destination can be "
882 "specified for a p2p or a loopback IF only\n");
887 * The following message seems noisy, but we dare to
888 * add it for diagnosis.
890 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
891 "when dstaddr is specified\n");
895 /* lifetime consistency check */
896 lt = &ifra->ifra_lifetime;
897 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
898 && lt->ia6t_vltime + time_second < time_second) {
901 if (lt->ia6t_vltime == 0) {
903 * the following log might be noisy, but this is a typical
904 * configuration mistake or a tool's bug.
907 "in6_update_ifa: valid lifetime is 0 for %s\n",
908 ip6_sprintf(&ifra->ifra_addr.sin6_addr));
910 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
911 && lt->ia6t_pltime + time_second < time_second) {
916 * If this is a new address, allocate a new ifaddr and link it
922 * When in6_update_ifa() is called in a process of a received
923 * RA, it is called under splnet(). So, we should call malloc
926 ia = ifa_create(sizeof(*ia), M_NOWAIT);
929 /* Initialize the address and masks */
930 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
931 ia->ia_addr.sin6_family = AF_INET6;
932 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
933 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
935 * XXX: some functions expect that ifa_dstaddr is not
936 * NULL for p2p interfaces.
938 ia->ia_ifa.ifa_dstaddr
939 = (struct sockaddr *)&ia->ia_dstaddr;
941 ia->ia_ifa.ifa_dstaddr = NULL;
943 ia->ia_ifa.ifa_netmask
944 = (struct sockaddr *)&ia->ia_prefixmask;
947 if ((oia = in6_ifaddr) != NULL) {
948 for ( ; oia->ia_next; oia = oia->ia_next)
954 ifa_iflink(&ia->ia_ifa, ifp, 1);
957 /* set prefix mask */
958 if (ifra->ifra_prefixmask.sin6_len) {
960 * We prohibit changing the prefix length of an existing
962 * + such an operation should be rare in IPv6, and
963 * + the operation would confuse prefix management.
965 if (ia->ia_prefixmask.sin6_len &&
966 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
967 log(LOG_INFO, "in6_update_ifa: the prefix length of an"
968 " existing (%s) address should not be changed\n",
969 ip6_sprintf(&ia->ia_addr.sin6_addr));
973 ia->ia_prefixmask = ifra->ifra_prefixmask;
977 * If a new destination address is specified, scrub the old one and
978 * install the new destination. Note that the interface must be
979 * p2p or loopback (see the check above.)
981 if (dst6.sin6_family == AF_INET6 &&
982 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
983 &ia->ia_dstaddr.sin6_addr)) {
986 if ((ia->ia_flags & IFA_ROUTE) &&
987 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
989 log(LOG_ERR, "in6_update_ifa: failed to remove "
990 "a route to the old destination: %s\n",
991 ip6_sprintf(&ia->ia_addr.sin6_addr));
992 /* proceed anyway... */
995 ia->ia_flags &= ~IFA_ROUTE;
996 ia->ia_dstaddr = dst6;
999 /* reset the interface and routing table appropriately. */
1000 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1004 * Beyond this point, we should call in6_purgeaddr upon an error,
1005 * not just go to unlink.
1008 #if 0 /* disable this mechanism for now */
1009 /* update prefix list */
1011 (ifra->ifra_flags & IN6_IFF_NOPFX) == 0) { /* XXX */
1014 iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen;
1015 if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) {
1016 in6_purgeaddr((struct ifaddr *)ia);
1022 if (ifp->if_flags & IFF_MULTICAST) {
1023 struct sockaddr_in6 mltaddr, mltmask;
1024 struct in6_multi *in6m;
1028 * join solicited multicast addr for new host id
1030 struct in6_addr llsol;
1031 bzero(&llsol, sizeof(struct in6_addr));
1032 llsol.s6_addr16[0] = htons(0xff02);
1033 llsol.s6_addr16[1] = htons(ifp->if_index);
1034 llsol.s6_addr32[1] = 0;
1035 llsol.s6_addr32[2] = htonl(1);
1036 llsol.s6_addr32[3] =
1037 ifra->ifra_addr.sin6_addr.s6_addr32[3];
1038 llsol.s6_addr8[12] = 0xff;
1039 in6_addmulti(&llsol, ifp, &error);
1042 "in6_update_ifa: addmulti failed for "
1043 "%s on %s (errno=%d)\n",
1044 ip6_sprintf(&llsol), if_name(ifp),
1046 in6_purgeaddr((struct ifaddr *)ia);
1051 bzero(&mltmask, sizeof(mltmask));
1052 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1053 mltmask.sin6_family = AF_INET6;
1054 mltmask.sin6_addr = in6mask32;
1057 * join link-local all-nodes address
1059 bzero(&mltaddr, sizeof(mltaddr));
1060 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1061 mltaddr.sin6_family = AF_INET6;
1062 mltaddr.sin6_addr = kin6addr_linklocal_allnodes;
1063 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
1065 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1067 rtrequest_global(RTM_ADD,
1068 (struct sockaddr *)&mltaddr,
1069 (struct sockaddr *)&ia->ia_addr,
1070 (struct sockaddr *)&mltmask,
1071 RTF_UP|RTF_CLONING); /* xxx */
1072 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1075 "in6_update_ifa: addmulti failed for "
1076 "%s on %s (errno=%d)\n",
1077 ip6_sprintf(&mltaddr.sin6_addr),
1078 if_name(ifp), error);
1083 * join node information group address
1085 #define hostnamelen strlen(hostname)
1086 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
1088 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1089 if (in6m == NULL && ia != NULL) {
1090 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1092 log(LOG_WARNING, "in6_update_ifa: "
1093 "addmulti failed for "
1094 "%s on %s (errno=%d)\n",
1095 ip6_sprintf(&mltaddr.sin6_addr),
1096 if_name(ifp), error);
1103 * join node-local all-nodes address, on loopback.
1104 * XXX: since "node-local" is obsoleted by interface-local,
1105 * we have to join the group on every interface with
1106 * some interface-boundary restriction.
1108 if (ifp->if_flags & IFF_LOOPBACK) {
1109 struct in6_ifaddr *ia_loop;
1111 struct in6_addr loop6 = kin6addr_loopback;
1112 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
1114 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes;
1116 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1117 if (in6m == NULL && ia_loop != NULL) {
1118 rtrequest_global(RTM_ADD,
1119 (struct sockaddr *)&mltaddr,
1120 (struct sockaddr *)&ia_loop->ia_addr,
1121 (struct sockaddr *)&mltmask,
1123 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1125 log(LOG_WARNING, "in6_update_ifa: "
1126 "addmulti failed for %s on %s "
1128 ip6_sprintf(&mltaddr.sin6_addr),
1129 if_name(ifp), error);
1135 ia->ia6_flags = ifra->ifra_flags;
1136 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
1137 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
1139 ia->ia6_lifetime = ifra->ifra_lifetime;
1141 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1142 ia->ia6_lifetime.ia6t_expire =
1143 time_second + ia->ia6_lifetime.ia6t_vltime;
1145 ia->ia6_lifetime.ia6t_expire = 0;
1146 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1147 ia->ia6_lifetime.ia6t_preferred =
1148 time_second + ia->ia6_lifetime.ia6t_pltime;
1150 ia->ia6_lifetime.ia6t_preferred = 0;
1153 * Perform DAD, if needed.
1154 * XXX It may be of use, if we can administratively
1157 if (in6if_do_dad(ifp) && !(ifra->ifra_flags & IN6_IFF_NODAD)) {
1158 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1159 nd6_dad_start((struct ifaddr *)ia, NULL);
1166 * XXX: if a change of an existing address failed, keep the entry
1170 in6_unlink_ifa(ia, ifp);
1175 in6_purgeaddr(struct ifaddr *ifa)
1177 struct ifnet *ifp = ifa->ifa_ifp;
1178 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1180 /* stop DAD processing */
1184 * delete route to the destination of the address being purged.
1185 * The interface must be p2p or loopback in this case.
1187 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) {
1190 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1192 log(LOG_ERR, "in6_purgeaddr: failed to remove "
1193 "a route to the p2p destination: %s on %s, "
1195 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
1197 /* proceed anyway... */
1200 ia->ia_flags &= ~IFA_ROUTE;
1203 /* Remove ownaddr's loopback rtentry, if it exists. */
1204 in6_ifremloop(&(ia->ia_ifa));
1206 if (ifp->if_flags & IFF_MULTICAST) {
1208 * delete solicited multicast addr for deleting host id
1210 struct in6_multi *in6m;
1211 struct in6_addr llsol;
1212 bzero(&llsol, sizeof(struct in6_addr));
1213 llsol.s6_addr16[0] = htons(0xff02);
1214 llsol.s6_addr16[1] = htons(ifp->if_index);
1215 llsol.s6_addr32[1] = 0;
1216 llsol.s6_addr32[2] = htonl(1);
1217 llsol.s6_addr32[3] =
1218 ia->ia_addr.sin6_addr.s6_addr32[3];
1219 llsol.s6_addr8[12] = 0xff;
1221 IN6_LOOKUP_MULTI(llsol, ifp, in6m);
1226 in6_unlink_ifa(ia, ifp);
1230 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1233 struct in6_ifaddr *oia;
1237 ifa_ifunlink(&ia->ia_ifa, ifp);
1240 if (oia == (ia = in6_ifaddr))
1241 in6_ifaddr = ia->ia_next;
1243 while (ia->ia_next && (ia->ia_next != oia))
1246 ia->ia_next = oia->ia_next;
1249 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1253 if (oia->ia6_ifpr) { /* check for safety */
1254 plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL);
1255 iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen;
1256 in6_prefix_remove_ifid(iilen, oia);
1260 * When an autoconfigured address is being removed, release the
1261 * reference to the base prefix. Also, since the release might
1262 * affect the status of other (detached) addresses, call
1263 * pfxlist_onlink_check().
1265 if (oia->ia6_flags & IN6_IFF_AUTOCONF) {
1266 if (oia->ia6_ndpr == NULL) {
1267 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
1268 "%p has no prefix\n", oia);
1270 oia->ia6_ndpr->ndpr_refcnt--;
1271 oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
1272 oia->ia6_ndpr = NULL;
1275 pfxlist_onlink_check();
1279 * release another refcnt for the link from in6_ifaddr.
1280 * Note that we should decrement the refcnt at least once for all *BSD.
1282 ifa_destroy(&oia->ia_ifa);
1288 in6_purgeif(struct ifnet *ifp)
1290 struct ifaddr_container *ifac, *next;
1292 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
1294 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1296 in6_purgeaddr(ifac->ifa);
1304 * SIOCGLIFADDR: get first address. (?)
1305 * SIOCGLIFADDR with IFLR_PREFIX:
1306 * get first address that matches the specified prefix.
1307 * SIOCALIFADDR: add the specified address.
1308 * SIOCALIFADDR with IFLR_PREFIX:
1309 * add the specified prefix, filling hostid part from
1310 * the first link-local address. prefixlen must be <= 64.
1311 * SIOCDLIFADDR: delete the specified address.
1312 * SIOCDLIFADDR with IFLR_PREFIX:
1313 * delete the first address that matches the specified prefix.
1315 * EINVAL on invalid parameters
1316 * EADDRNOTAVAIL on prefix match failed/specified address not found
1317 * other values may be returned from in6_ioctl()
1319 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1320 * this is to accomodate address naming scheme other than RFC2374,
1322 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1323 * address encoding scheme. (see figure on page 8)
1326 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1327 struct ifnet *ifp, struct thread *td)
1329 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1330 struct sockaddr *sa;
1333 if (!data || !ifp) {
1334 panic("invalid argument to in6_lifaddr_ioctl");
1340 /* address must be specified on GET with IFLR_PREFIX */
1341 if (!(iflr->flags & IFLR_PREFIX))
1346 /* address must be specified on ADD and DELETE */
1347 sa = (struct sockaddr *)&iflr->addr;
1348 if (sa->sa_family != AF_INET6)
1350 if (sa->sa_len != sizeof(struct sockaddr_in6))
1352 /* XXX need improvement */
1353 sa = (struct sockaddr *)&iflr->dstaddr;
1354 if (sa->sa_family && sa->sa_family != AF_INET6)
1356 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1359 default: /* shouldn't happen */
1361 panic("invalid cmd to in6_lifaddr_ioctl");
1367 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1373 struct in6_aliasreq ifra;
1374 struct in6_addr *hostid = NULL;
1377 if (iflr->flags & IFLR_PREFIX) {
1379 struct sockaddr_in6 *sin6;
1382 * hostid is to fill in the hostid part of the
1383 * address. hostid points to the first link-local
1384 * address attached to the interface.
1386 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1388 return EADDRNOTAVAIL;
1389 hostid = IFA_IN6(ifa);
1391 /* prefixlen must be <= 64. */
1392 if (64 < iflr->prefixlen)
1394 prefixlen = iflr->prefixlen;
1396 /* hostid part must be zero. */
1397 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1398 if (sin6->sin6_addr.s6_addr32[2] != 0
1399 || sin6->sin6_addr.s6_addr32[3] != 0) {
1403 prefixlen = iflr->prefixlen;
1405 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1406 bzero(&ifra, sizeof(ifra));
1407 bcopy(iflr->iflr_name, ifra.ifra_name,
1408 sizeof(ifra.ifra_name));
1410 bcopy(&iflr->addr, &ifra.ifra_addr,
1411 ((struct sockaddr *)&iflr->addr)->sa_len);
1413 /* fill in hostid part */
1414 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1415 hostid->s6_addr32[2];
1416 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1417 hostid->s6_addr32[3];
1420 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
1421 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1422 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1424 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1425 hostid->s6_addr32[2];
1426 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1427 hostid->s6_addr32[3];
1431 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1432 in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1434 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1435 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1440 struct ifaddr_container *ifac;
1441 struct in6_ifaddr *ia;
1442 struct in6_addr mask, candidate, match;
1443 struct sockaddr_in6 *sin6;
1446 bzero(&mask, sizeof(mask));
1447 if (iflr->flags & IFLR_PREFIX) {
1448 /* lookup a prefix rather than address. */
1449 in6_len2mask(&mask, iflr->prefixlen);
1451 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1452 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1453 match.s6_addr32[0] &= mask.s6_addr32[0];
1454 match.s6_addr32[1] &= mask.s6_addr32[1];
1455 match.s6_addr32[2] &= mask.s6_addr32[2];
1456 match.s6_addr32[3] &= mask.s6_addr32[3];
1458 /* if you set extra bits, that's wrong */
1459 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1464 if (cmd == SIOCGLIFADDR) {
1465 /* on getting an address, take the 1st match */
1468 /* on deleting an address, do exact match */
1469 in6_len2mask(&mask, 128);
1470 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1471 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1477 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1478 struct ifaddr *ifa = ifac->ifa;
1480 if (ifa->ifa_addr->sa_family != AF_INET6)
1485 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1487 * XXX: this is adhoc, but is necessary to allow
1488 * a user to specify fe80::/64 (not /10) for a
1489 * link-local address.
1491 if (IN6_IS_ADDR_LINKLOCAL(&candidate))
1492 candidate.s6_addr16[1] = 0;
1493 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1494 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1495 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1496 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1497 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1501 return EADDRNOTAVAIL;
1502 ia = ifa2ia6(ifac->ifa);
1504 if (cmd == SIOCGLIFADDR) {
1505 struct sockaddr_in6 *s6;
1507 /* fill in the if_laddrreq structure */
1508 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1509 s6 = (struct sockaddr_in6 *)&iflr->addr;
1510 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1511 s6->sin6_addr.s6_addr16[1] = 0;
1513 in6_addr2scopeid(ifp, &s6->sin6_addr);
1515 if (ifp->if_flags & IFF_POINTOPOINT) {
1516 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1517 ia->ia_dstaddr.sin6_len);
1518 s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
1519 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1520 s6->sin6_addr.s6_addr16[1] = 0;
1522 in6_addr2scopeid(ifp,
1526 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1529 in6_mask2len(&ia->ia_prefixmask.sin6_addr,
1532 iflr->flags = ia->ia6_flags; /* XXX */
1536 struct in6_aliasreq ifra;
1538 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1539 bzero(&ifra, sizeof(ifra));
1540 bcopy(iflr->iflr_name, ifra.ifra_name,
1541 sizeof(ifra.ifra_name));
1543 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1544 ia->ia_addr.sin6_len);
1545 if (ifp->if_flags & IFF_POINTOPOINT)
1546 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1547 ia->ia_dstaddr.sin6_len);
1549 bzero(&ifra.ifra_dstaddr,
1550 sizeof(ifra.ifra_dstaddr));
1551 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1552 ia->ia_prefixmask.sin6_len);
1554 ifra.ifra_flags = ia->ia6_flags;
1555 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1561 return EOPNOTSUPP; /* just for safety */
1565 * Initialize an interface's intetnet6 address
1566 * and routing table entry.
1569 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6,
1572 int error = 0, plen, ifacount = 0;
1573 struct ifaddr_container *ifac;
1576 * Give the interface a chance to initialize
1577 * if this is its first address,
1578 * and to validate the address if necessary.
1580 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1581 if (ifac->ifa->ifa_addr == NULL)
1582 continue; /* just for safety */
1583 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1588 lwkt_serialize_enter(ifp->if_serializer);
1590 ia->ia_addr = *sin6;
1592 if (ifacount <= 1 && ifp->if_ioctl &&
1593 (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia, NULL))) {
1594 lwkt_serialize_exit(ifp->if_serializer);
1597 lwkt_serialize_exit(ifp->if_serializer);
1599 ia->ia_ifa.ifa_metric = ifp->if_metric;
1601 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1605 * If the destination address is specified for a point-to-point
1606 * interface, install a route to the destination as an interface
1609 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1610 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
1611 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
1612 RTF_UP | RTF_HOST)) != 0)
1614 ia->ia_flags |= IFA_ROUTE;
1618 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1620 ia->ia_ifa.ifa_flags |= RTF_CLONING;
1623 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1625 /* set the rtrequest function to create llinfo */
1626 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
1627 in6_ifaddloop(&(ia->ia_ifa));
1633 struct in6_multi_mship *
1634 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp)
1636 struct in6_multi_mship *imm;
1638 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT);
1643 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp);
1644 if (!imm->i6mm_maddr) {
1645 /* *errorp is alrady set */
1646 kfree(imm, M_IPMADDR);
1653 in6_leavegroup(struct in6_multi_mship *imm)
1656 if (imm->i6mm_maddr)
1657 in6_delmulti(imm->i6mm_maddr);
1658 kfree(imm, M_IPMADDR);
1663 * Add an address to the list of IP6 multicast addresses for a
1667 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp)
1669 struct in6_multi *in6m;
1670 struct sockaddr_in6 sin6;
1671 struct ifmultiaddr *ifma;
1678 * Call generic routine to add membership or increment
1679 * refcount. It wants addresses in the form of a sockaddr,
1680 * so we build one here (being careful to zero the unused bytes).
1682 bzero(&sin6, sizeof sin6);
1683 sin6.sin6_family = AF_INET6;
1684 sin6.sin6_len = sizeof sin6;
1685 sin6.sin6_addr = *maddr6;
1686 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
1693 * If ifma->ifma_protospec is null, then if_addmulti() created
1694 * a new record. Otherwise, we are done.
1696 if (ifma->ifma_protospec != 0) {
1698 return ifma->ifma_protospec;
1701 /* XXX - if_addmulti uses M_WAITOK. Can this really be called
1702 at interrupt time? If so, need to fix if_addmulti. XXX */
1703 in6m = (struct in6_multi *)kmalloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT);
1709 bzero(in6m, sizeof *in6m);
1710 in6m->in6m_addr = *maddr6;
1711 in6m->in6m_ifp = ifp;
1712 in6m->in6m_ifma = ifma;
1713 ifma->ifma_protospec = in6m;
1714 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
1717 * Let MLD6 know that we have joined a new IP6 multicast
1720 mld6_start_listening(in6m);
1726 * Delete a multicast address record.
1729 in6_delmulti(struct in6_multi *in6m)
1731 struct ifmultiaddr *ifma = in6m->in6m_ifma;
1735 if (ifma->ifma_refcount == 1) {
1737 * No remaining claims to this record; let MLD6 know
1738 * that we are leaving the multicast group.
1740 mld6_stop_listening(in6m);
1741 ifma->ifma_protospec = 0;
1742 LIST_REMOVE(in6m, in6m_entry);
1743 kfree(in6m, M_IPMADDR);
1745 /* XXX - should be separate API for when we have an ifma? */
1746 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
1751 * Find an IPv6 interface link-local address specific to an interface.
1754 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1756 struct ifaddr_container *ifac;
1758 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1759 struct ifaddr *ifa = ifac->ifa;
1761 if (ifa->ifa_addr == NULL)
1762 continue; /* just for safety */
1763 if (ifa->ifa_addr->sa_family != AF_INET6)
1765 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1766 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1773 return ((struct in6_ifaddr *)(ifac->ifa));
1780 * find the internet address corresponding to a given interface and address.
1783 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1785 struct ifaddr_container *ifac;
1787 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1788 struct ifaddr *ifa = ifac->ifa;
1790 if (ifa->ifa_addr == NULL)
1791 continue; /* just for safety */
1792 if (ifa->ifa_addr->sa_family != AF_INET6)
1794 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
1798 return ((struct in6_ifaddr *)(ifac->ifa));
1804 * find the internet address on a given interface corresponding to a neighbor's
1808 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr)
1811 struct in6_ifaddr *ia;
1812 struct ifaddr_container *ifac;
1814 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1817 if (ifa->ifa_addr == NULL)
1818 continue; /* just for safety */
1819 if (ifa->ifa_addr->sa_family != AF_INET6)
1821 ia = (struct in6_ifaddr *)ifa;
1822 if (IN6_ARE_MASKED_ADDR_EQUAL(addr,
1823 &ia->ia_addr.sin6_addr,
1824 &ia->ia_prefixmask.sin6_addr))
1832 * Convert IP6 address to printable (loggable) representation.
1834 static char digits[] = "0123456789abcdef";
1835 static int ip6round = 0;
1837 ip6_sprintf(const struct in6_addr *addr)
1839 static char ip6buf[8][48];
1842 const u_short *a = (const u_short *)addr;
1846 ip6round = (ip6round + 1) & 7;
1847 cp = ip6buf[ip6round];
1849 for (i = 0; i < 8; i++) {
1860 if (dcolon == 0 && *(a + 1) == 0) {
1872 d = (const u_char *)a;
1873 *cp++ = digits[*d >> 4];
1874 *cp++ = digits[*d++ & 0xf];
1875 *cp++ = digits[*d >> 4];
1876 *cp++ = digits[*d & 0xf];
1881 return (ip6buf[ip6round]);
1885 in6_localaddr(struct in6_addr *in6)
1887 struct in6_ifaddr *ia;
1889 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1892 for (ia = in6_ifaddr; ia; ia = ia->ia_next)
1893 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1894 &ia->ia_prefixmask.sin6_addr))
1901 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1903 struct in6_ifaddr *ia;
1905 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
1906 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
1908 (ia->ia6_flags & IN6_IFF_DEPRECATED))
1909 return (1); /* true */
1911 /* XXX: do we still have to go thru the rest of the list? */
1914 return (0); /* false */
1918 * return length of part which dst and src are equal
1922 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1925 u_char *s = (u_char *)src, *d = (u_char *)dst;
1926 u_char *lim = s + 16, r;
1929 if ((r = (*d++ ^ *s++)) != 0) {
1940 /* XXX: to be scope conscious */
1942 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1944 int bytelen, bitlen;
1947 if (0 > len || len > 128) {
1948 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1956 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1958 if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
1959 p2->s6_addr[bytelen] >> (8 - bitlen))
1966 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1968 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1969 int bytelen, bitlen, i;
1972 if (0 > len || len > 128) {
1973 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1978 bzero(maskp, sizeof(*maskp));
1981 for (i = 0; i < bytelen; i++)
1982 maskp->s6_addr[i] = 0xff;
1984 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1988 * return the best address out of the same scope
1991 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst)
1993 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
1996 struct in6_ifaddr *ifa_best = NULL;
2000 kprintf("in6_ifawithscope: output interface is not specified\n");
2006 * We search for all addresses on all interfaces from the beginning.
2007 * Comparing an interface with the outgoing interface will be done
2008 * only at the final stage of tiebreaking.
2010 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
2012 struct ifaddr_container *ifac;
2015 * We can never take an address that breaks the scope zone
2016 * of the destination.
2018 if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
2021 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2022 int tlen = -1, dscopecmp, bscopecmp, matchcmp;
2023 struct ifaddr *ifa = ifac->ifa;
2025 if (ifa->ifa_addr->sa_family != AF_INET6)
2028 src_scope = in6_addrscope(IFA_IN6(ifa));
2031 * Don't use an address before completing DAD
2032 * nor a duplicated address.
2034 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2038 /* XXX: is there any case to allow anycasts? */
2039 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2043 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2048 * If this is the first address we find,
2051 if (ifa_best == NULL)
2055 * ifa_best is never NULL beyond this line except
2056 * within the block labeled "replace".
2060 * If ifa_best has a smaller scope than dst and
2061 * the current address has a larger one than
2062 * (or equal to) dst, always replace ifa_best.
2063 * Also, if the current address has a smaller scope
2064 * than dst, ignore it unless ifa_best also has a
2066 * Consequently, after the two if-clause below,
2067 * the followings must be satisfied:
2068 * (scope(src) < scope(dst) &&
2069 * scope(best) < scope(dst))
2071 * (scope(best) >= scope(dst) &&
2072 * scope(src) >= scope(dst))
2074 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
2075 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
2076 goto replace; /* (A) */
2077 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
2078 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
2082 * A deprecated address SHOULD NOT be used in new
2083 * communications if an alternate (non-deprecated)
2084 * address is available and has sufficient scope.
2085 * RFC 2462, Section 5.5.4.
2087 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2088 IN6_IFF_DEPRECATED) {
2090 * Ignore any deprecated addresses if
2091 * specified by configuration.
2093 if (!ip6_use_deprecated)
2097 * If we have already found a non-deprecated
2098 * candidate, just ignore deprecated addresses.
2100 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED))
2105 * A non-deprecated address is always preferred
2106 * to a deprecated one regardless of scopes and
2107 * address matching (Note invariants ensured by the
2108 * conditions (A) and (B) above.)
2110 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
2111 !(((struct in6_ifaddr *)ifa)->ia6_flags &
2112 IN6_IFF_DEPRECATED))
2116 * When we use temporary addresses described in
2117 * RFC 3041, we prefer temporary addresses to
2118 * public autoconf addresses. Again, note the
2119 * invariants from (A) and (B). Also note that we
2120 * don't have any preference between static addresses
2121 * and autoconf addresses (despite of whether or not
2122 * the latter is temporary or public.)
2124 if (ip6_use_tempaddr) {
2125 struct in6_ifaddr *ifat;
2127 ifat = (struct in6_ifaddr *)ifa;
2128 if ((ifa_best->ia6_flags &
2129 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2130 == IN6_IFF_AUTOCONF &&
2132 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2133 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
2136 if ((ifa_best->ia6_flags &
2137 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2138 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
2140 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2141 == IN6_IFF_AUTOCONF) {
2147 * At this point, we have two cases:
2148 * 1. we are looking at a non-deprecated address,
2149 * and ifa_best is also non-deprecated.
2150 * 2. we are looking at a deprecated address,
2151 * and ifa_best is also deprecated.
2152 * Also, we do not have to consider a case where
2153 * the scope of if_best is larger(smaller) than dst and
2154 * the scope of the current address is smaller(larger)
2155 * than dst. Such a case has already been covered.
2156 * Tiebreaking is done according to the following
2158 * - the scope comparison between the address and
2160 * - the scope comparison between the address and
2161 * ifa_best (bscopecmp)
2162 * - if the address match dst longer than ifa_best
2164 * - if the address is on the outgoing I/F (outI/F)
2166 * Roughly speaking, the selection policy is
2167 * - the most important item is scope. The same scope
2168 * is best. Then search for a larger scope.
2169 * Smaller scopes are the last resort.
2170 * - A deprecated address is chosen only when we have
2171 * no address that has an enough scope, but is
2172 * prefered to any addresses of smaller scopes
2173 * (this must be already done above.)
2174 * - addresses on the outgoing I/F are preferred to
2175 * ones on other interfaces if none of above
2176 * tiebreaks. In the table below, the column "bI"
2177 * means if the best_ifa is on the outgoing
2178 * interface, and the column "sI" means if the ifa
2179 * is on the outgoing interface.
2180 * - If there is no other reasons to choose one,
2181 * longest address match against dst is considered.
2183 * The precise decision table is as follows:
2184 * dscopecmp bscopecmp match bI oI | replace?
2185 * N/A equal N/A Y N | No (1)
2186 * N/A equal N/A N Y | Yes (2)
2187 * N/A equal larger N/A | Yes (3)
2188 * N/A equal !larger N/A | No (4)
2189 * larger larger N/A N/A | No (5)
2190 * larger smaller N/A N/A | Yes (6)
2191 * smaller larger N/A N/A | Yes (7)
2192 * smaller smaller N/A N/A | No (8)
2193 * equal smaller N/A N/A | Yes (9)
2194 * equal larger (already done at A above)
2196 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
2197 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
2199 if (bscopecmp == 0) {
2200 struct ifnet *bifp = ifa_best->ia_ifp;
2202 if (bifp == oifp && ifp != oifp) /* (1) */
2204 if (bifp != oifp && ifp == oifp) /* (2) */
2208 * Both bifp and ifp are on the outgoing
2209 * interface, or both two are on a different
2210 * interface from the outgoing I/F.
2211 * now we need address matching against dst
2214 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2215 matchcmp = tlen - blen;
2216 if (matchcmp > 0) /* (3) */
2220 if (dscopecmp > 0) {
2221 if (bscopecmp > 0) /* (5) */
2223 goto replace; /* (6) */
2225 if (dscopecmp < 0) {
2226 if (bscopecmp > 0) /* (7) */
2231 /* now dscopecmp must be 0 */
2233 goto replace; /* (9) */
2236 ifa_best = (struct in6_ifaddr *)ifa;
2237 blen = tlen >= 0 ? tlen :
2238 in6_matchlen(IFA_IN6(ifa), dst);
2239 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
2243 /* count statistics for future improvements */
2244 if (ifa_best == NULL)
2245 ip6stat.ip6s_sources_none++;
2247 if (oifp == ifa_best->ia_ifp)
2248 ip6stat.ip6s_sources_sameif[best_scope]++;
2250 ip6stat.ip6s_sources_otherif[best_scope]++;
2252 if (best_scope == dst_scope)
2253 ip6stat.ip6s_sources_samescope[best_scope]++;
2255 ip6stat.ip6s_sources_otherscope[best_scope]++;
2257 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
2258 ip6stat.ip6s_sources_deprecated[best_scope]++;
2265 * return the best address out of the same scope. if no address was
2266 * found, return the first valid address from designated IF.
2269 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2271 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2272 struct ifaddr_container *ifac;
2273 struct in6_ifaddr *besta = 0;
2274 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2276 dep[0] = dep[1] = NULL;
2279 * We first look for addresses in the same scope.
2280 * If there is one, return it.
2281 * If two or more, return one which matches the dst longest.
2282 * If none, return one of global addresses assigned other ifs.
2284 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2285 struct ifaddr *ifa = ifac->ifa;
2287 if (ifa->ifa_addr->sa_family != AF_INET6)
2289 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2290 continue; /* XXX: is there any case to allow anycast? */
2291 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2292 continue; /* don't use this interface */
2293 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2295 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2296 if (ip6_use_deprecated)
2297 dep[0] = (struct in6_ifaddr *)ifa;
2301 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2303 * call in6_matchlen() as few as possible
2307 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2308 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2311 besta = (struct in6_ifaddr *)ifa;
2314 besta = (struct in6_ifaddr *)ifa;
2320 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2321 struct ifaddr *ifa = ifac->ifa;
2323 if (ifa->ifa_addr->sa_family != AF_INET6)
2325 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2326 continue; /* XXX: is there any case to allow anycast? */
2327 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2328 continue; /* don't use this interface */
2329 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2331 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2332 if (ip6_use_deprecated)
2333 dep[1] = (struct in6_ifaddr *)ifa;
2337 return (struct in6_ifaddr *)ifa;
2340 /* use the last-resort values, that are, deprecated addresses */
2350 * perform DAD when interface becomes IFF_UP.
2353 in6_if_up(struct ifnet *ifp)
2355 struct ifaddr_container *ifac;
2356 struct in6_ifaddr *ia;
2357 int dad_delay; /* delay ticks before DAD output */
2360 * special cases, like 6to4, are handled in in6_ifattach
2362 in6_ifattach(ifp, NULL);
2365 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2366 struct ifaddr *ifa = ifac->ifa;
2368 if (ifa->ifa_addr->sa_family != AF_INET6)
2370 ia = (struct in6_ifaddr *)ifa;
2371 if (ia->ia6_flags & IN6_IFF_TENTATIVE)
2372 nd6_dad_start(ifa, &dad_delay);
2377 in6if_do_dad(struct ifnet *ifp)
2379 if (ifp->if_flags & IFF_LOOPBACK)
2382 switch (ifp->if_type) {
2388 * These interfaces do not have the IFF_LOOPBACK flag,
2389 * but loop packets back. We do not have to do DAD on such
2390 * interfaces. We should even omit it, because loop-backed
2391 * NS would confuse the DAD procedure.
2396 * Our DAD routine requires the interface up and running.
2397 * However, some interfaces can be up before the RUNNING
2398 * status. Additionaly, users may try to assign addresses
2399 * before the interface becomes up (or running).
2400 * We simply skip DAD in such a case as a work around.
2401 * XXX: we should rather mark "tentative" on such addresses,
2402 * and do DAD after the interface becomes ready.
2404 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2405 (IFF_UP|IFF_RUNNING))
2413 * Calculate max IPv6 MTU through all the interfaces and store it
2419 unsigned long maxmtu = 0;
2422 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
2424 if (!(ifp->if_flags & IFF_LOOPBACK) &&
2425 ND_IFINFO(ifp)->linkmtu > maxmtu)
2426 maxmtu = ND_IFINFO(ifp)->linkmtu;
2428 if (maxmtu) /* update only when maxmtu is positive */
2429 in6_maxmtu = maxmtu;
2433 in6_domifattach(struct ifnet *ifp)
2435 struct in6_ifextra *ext;
2437 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2438 bzero(ext, sizeof(*ext));
2440 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat),
2441 M_IFADDR, M_WAITOK);
2442 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2445 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat),
2446 M_IFADDR, M_WAITOK);
2447 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2449 ext->nd_ifinfo = nd6_ifattach(ifp);
2450 ext->scope6_id = scope6_ifattach(ifp);
2455 in6_domifdetach(struct ifnet *ifp, void *aux)
2457 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2458 scope6_ifdetach(ext->scope6_id);
2459 nd6_ifdetach(ext->nd_ifinfo);
2460 kfree(ext->in6_ifstat, M_IFADDR);
2461 kfree(ext->icmp6_ifstat, M_IFADDR);
2462 kfree(ext, M_IFADDR);
2466 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2467 * v4 mapped addr or v4 compat addr
2470 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2472 bzero(sin, sizeof(*sin));
2473 sin->sin_len = sizeof(struct sockaddr_in);
2474 sin->sin_family = AF_INET;
2475 sin->sin_port = sin6->sin6_port;
2476 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2479 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2481 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2483 bzero(sin6, sizeof(*sin6));
2484 sin6->sin6_len = sizeof(struct sockaddr_in6);
2485 sin6->sin6_family = AF_INET6;
2486 sin6->sin6_port = sin->sin_port;
2487 sin6->sin6_addr.s6_addr32[0] = 0;
2488 sin6->sin6_addr.s6_addr32[1] = 0;
2489 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2490 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2493 /* Convert sockaddr_in6 into sockaddr_in. */
2495 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2497 struct sockaddr_in *sin_p;
2498 struct sockaddr_in6 sin6;
2501 * Save original sockaddr_in6 addr and convert it
2504 sin6 = *(struct sockaddr_in6 *)nam;
2505 sin_p = (struct sockaddr_in *)nam;
2506 in6_sin6_2_sin(sin_p, &sin6);
2509 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2511 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2513 struct sockaddr_in *sin_p;
2514 struct sockaddr_in6 *sin6_p;
2516 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
2518 sin_p = (struct sockaddr_in *)*nam;
2519 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2520 FREE(*nam, M_SONAME);
2521 *nam = (struct sockaddr *)sin6_p;