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>
81 #include <sys/kernel.h>
82 #include <sys/syslog.h>
83 #include <sys/thread2.h>
86 #include <net/if_types.h>
87 #include <net/route.h>
88 #include <net/if_dl.h>
90 #include <netinet/in.h>
91 #include <netinet/in_var.h>
92 #include <netinet/if_ether.h>
93 #include <netinet/in_systm.h>
94 #include <netinet/ip.h>
95 #include <netinet/in_pcb.h>
97 #include <netinet/ip6.h>
98 #include <netinet6/ip6_var.h>
99 #include <netinet6/nd6.h>
100 #include <netinet6/mld6_var.h>
101 #include <netinet6/ip6_mroute.h>
102 #include <netinet6/in6_ifattach.h>
103 #include <netinet6/scope6_var.h>
104 #include <netinet6/in6_pcb.h>
105 #include <netinet6/in6_var.h>
107 #include <net/net_osdep.h>
110 * Definitions of some costant IP6 addresses.
112 const struct in6_addr kin6addr_any = IN6ADDR_ANY_INIT;
113 const struct in6_addr kin6addr_loopback = IN6ADDR_LOOPBACK_INIT;
114 const struct in6_addr kin6addr_nodelocal_allnodes =
115 IN6ADDR_NODELOCAL_ALLNODES_INIT;
116 const struct in6_addr kin6addr_linklocal_allnodes =
117 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
118 const struct in6_addr kin6addr_linklocal_allrouters =
119 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
121 const struct in6_addr in6mask0 = IN6MASK0;
122 const struct in6_addr in6mask32 = IN6MASK32;
123 const struct in6_addr in6mask64 = IN6MASK64;
124 const struct in6_addr in6mask96 = IN6MASK96;
125 const struct in6_addr in6mask128 = IN6MASK128;
127 const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6,
128 0, 0, IN6ADDR_ANY_INIT, 0};
130 static int in6_lifaddr_ioctl (struct socket *, u_long, caddr_t,
131 struct ifnet *, struct thread *);
132 static int in6_ifinit (struct ifnet *, struct in6_ifaddr *,
133 struct sockaddr_in6 *, int);
134 static void in6_unlink_ifa (struct in6_ifaddr *, struct ifnet *);
135 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo *, struct rtentry *, void *);
137 struct in6_multihead in6_multihead; /* XXX BSS initialization */
139 int (*faithprefix_p)(struct in6_addr *);
142 * Subroutine for in6_ifaddloop() and in6_ifremloop().
143 * This routine does actual work.
146 in6_ifloop_request(int cmd, struct ifaddr *ifa)
148 struct sockaddr_in6 all1_sa;
149 struct rt_addrinfo rtinfo;
152 bzero(&all1_sa, sizeof(all1_sa));
153 all1_sa.sin6_family = AF_INET6;
154 all1_sa.sin6_len = sizeof(struct sockaddr_in6);
155 all1_sa.sin6_addr = in6mask128;
158 * We specify the address itself as the gateway, and set the
159 * RTF_LLINFO flag, so that the corresponding host route would have
160 * the flag, and thus applications that assume traditional behavior
161 * would be happy. Note that we assume the caller of the function
162 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
163 * which changes the outgoing interface to the loopback interface.
165 bzero(&rtinfo, sizeof(struct rt_addrinfo));
166 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr;
167 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
168 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa;
169 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO;
171 error = rtrequest1_global(cmd, &rtinfo,
172 in6_ifloop_request_callback, ifa);
174 log(LOG_ERR, "in6_ifloop_request: "
175 "%s operation failed for %s (errno=%d)\n",
176 cmd == RTM_ADD ? "ADD" : "DELETE",
177 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
183 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
184 struct rtentry *rt, void *arg)
186 struct ifaddr *ifa = arg;
192 * Make sure rt_ifa be equal to IFA, the second argument of the
194 * We need this because when we refer to rt_ifa->ia6_flags in
195 * ip6_input, we assume that the rt_ifa points to the address instead
196 * of the loopback address.
198 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) {
207 * Report the addition/removal of the address to the routing socket.
208 * XXX: since we called rtinit for a p2p interface with a destination,
209 * we end up reporting twice in such a case. Should we rather
210 * omit the second report?
214 rt_newaddrmsg(cmd, ifa, error, rt);
215 if (cmd == RTM_DELETE) {
216 if (rt->rt_refcnt == 0) {
223 /* no way to return any new error */
228 * Add ownaddr as loopback rtentry. We previously add the route only if
229 * necessary (ex. on a p2p link). However, since we now manage addresses
230 * separately from prefixes, we should always add the route. We can't
231 * rely on the cloning mechanism from the corresponding interface route
235 in6_ifaddloop(struct ifaddr *ifa)
239 /* If there is no loopback entry, allocate one. */
240 rt = rtpurelookup(ifa->ifa_addr);
241 if (rt == NULL || !(rt->rt_flags & RTF_HOST) ||
242 !(rt->rt_ifp->if_flags & IFF_LOOPBACK))
243 in6_ifloop_request(RTM_ADD, ifa);
249 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
253 in6_ifremloop(struct ifaddr *ifa)
255 struct in6_ifaddr *ia;
260 * Some of BSD variants do not remove cloned routes
261 * from an interface direct route, when removing the direct route
262 * (see comments in net/net_osdep.h). Even for variants that do remove
263 * cloned routes, they could fail to remove the cloned routes when
264 * we handle multple addresses that share a common prefix.
265 * So, we should remove the route corresponding to the deleted address
266 * regardless of the result of in6_is_ifloop_auto().
270 * Delete the entry only if exact one ifa exists. More than one ifa
271 * can exist if we assign a same single address to multiple
272 * (probably p2p) interfaces.
273 * XXX: we should avoid such a configuration in IPv6...
275 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
276 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
285 * Before deleting, check if a corresponding loopbacked host
286 * route surely exists. With this check, we can avoid to
287 * delete an interface direct route whose destination is same
288 * as the address being removed. This can happen when remofing
289 * a subnet-router anycast address on an interface attahced
290 * to a shared medium.
292 rt = rtpurelookup(ifa->ifa_addr);
293 if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
294 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
296 in6_ifloop_request(RTM_DELETE, ifa);
302 in6_ifindex2scopeid(int idx)
305 struct sockaddr_in6 *sin6;
306 struct ifaddr_container *ifac;
308 if (idx < 0 || if_index < idx)
310 ifp = ifindex2ifnet[idx];
312 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link)
314 struct ifaddr *ifa = ifac->ifa;
316 if (ifa->ifa_addr->sa_family != AF_INET6)
318 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
319 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
320 return sin6->sin6_scope_id & 0xffff;
327 in6_mask2len(struct in6_addr *mask, u_char *lim0)
330 u_char *lim = lim0, *p;
333 lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */
334 lim = (u_char *)mask + sizeof(*mask);
335 for (p = (u_char *)mask; p < lim; x++, p++) {
341 for (y = 0; y < 8; y++) {
342 if ((*p & (0x80 >> y)) == 0)
348 * when the limit pointer is given, do a stricter check on the
352 if (y != 0 && (*p & (0x00ff >> y)) != 0)
354 for (p = p + 1; p < lim; p++)
363 in6_len2mask(struct in6_addr *mask, int len)
367 bzero(mask, sizeof(*mask));
368 for (i = 0; i < len / 8; i++)
369 mask->s6_addr8[i] = 0xff;
371 mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff;
374 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
375 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
378 in6_control(struct socket *so, u_long cmd, caddr_t data,
379 struct ifnet *ifp, struct thread *td)
381 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
382 struct in6_ifaddr *ia = NULL;
383 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
392 case SIOCGETSGCNT_IN6:
393 case SIOCGETMIFCNT_IN6:
394 return (mrt6_ioctl(cmd, data));
401 case SIOCSNDFLUSH_IN6:
402 case SIOCSPFXFLUSH_IN6:
403 case SIOCSRTRFLUSH_IN6:
404 case SIOCSDEFIFACE_IN6:
405 case SIOCSIFINFO_FLAGS:
409 case OSIOCGIFINFO_IN6:
410 case SIOCGIFINFO_IN6:
413 case SIOCGNBRINFO_IN6:
414 case SIOCGDEFIFACE_IN6:
415 return (nd6_ioctl(cmd, data, ifp));
419 case SIOCSIFPREFIX_IN6:
420 case SIOCDIFPREFIX_IN6:
421 case SIOCAIFPREFIX_IN6:
422 case SIOCCIFPREFIX_IN6:
423 case SIOCSGIFPREFIX_IN6:
424 case SIOCGIFPREFIX_IN6:
426 "prefix ioctls are now invalidated. "
427 "please use ifconfig.\n");
435 return (scope6_set(ifp,
436 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
439 return (scope6_get(ifp,
440 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
443 return (scope6_get_default((struct scope6_id *)
444 ifr->ifr_ifru.ifru_scope_id));
455 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
459 * Find address for this interface, if it exists.
461 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
462 struct sockaddr_in6 *sa6 =
463 (struct sockaddr_in6 *)&ifra->ifra_addr;
465 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
466 if (sa6->sin6_addr.s6_addr16[1] == 0) {
467 /* link ID is not embedded by the user */
468 sa6->sin6_addr.s6_addr16[1] =
469 htons(ifp->if_index);
470 } else if (sa6->sin6_addr.s6_addr16[1] !=
471 htons(ifp->if_index)) {
472 return (EINVAL); /* link ID contradicts */
474 if (sa6->sin6_scope_id) {
475 if (sa6->sin6_scope_id !=
476 (u_int32_t)ifp->if_index)
478 sa6->sin6_scope_id = 0; /* XXX: good way? */
481 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
485 case SIOCSIFADDR_IN6:
486 case SIOCSIFDSTADDR_IN6:
487 case SIOCSIFNETMASK_IN6:
489 * Since IPv6 allows a node to assign multiple addresses
490 * on a single interface, SIOCSIFxxx ioctls are not suitable
491 * and should be unused.
493 /* we decided to obsolete this command (20000704) */
496 case SIOCDIFADDR_IN6:
498 * for IPv4, we look for existing in_ifaddr here to allow
499 * "ifconfig if0 delete" to remove first IPv4 address on the
500 * interface. For IPv6, as the spec allow multiple interface
501 * address from the day one, we consider "remove the first one"
502 * semantics to be not preferable.
505 return (EADDRNOTAVAIL);
507 case SIOCAIFADDR_IN6:
509 * We always require users to specify a valid IPv6 address for
510 * the corresponding operation.
512 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
513 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
514 return (EAFNOSUPPORT);
520 case SIOCGIFADDR_IN6:
521 /* This interface is basically deprecated. use SIOCGIFCONF. */
523 case SIOCGIFAFLAG_IN6:
524 case SIOCGIFNETMASK_IN6:
525 case SIOCGIFDSTADDR_IN6:
526 case SIOCGIFALIFETIME_IN6:
527 /* must think again about its semantics */
529 return (EADDRNOTAVAIL);
531 case SIOCSIFALIFETIME_IN6:
533 struct in6_addrlifetime *lt;
538 return (EADDRNOTAVAIL);
539 /* sanity for overflow - beware unsigned */
540 lt = &ifr->ifr_ifru.ifru_lifetime;
541 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
542 && lt->ia6t_vltime + time_second < time_second) {
545 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
546 && lt->ia6t_pltime + time_second < time_second) {
555 case SIOCGIFADDR_IN6:
556 ifr->ifr_addr = ia->ia_addr;
559 case SIOCGIFDSTADDR_IN6:
560 if (!(ifp->if_flags & IFF_POINTOPOINT))
563 * XXX: should we check if ifa_dstaddr is NULL and return
566 ifr->ifr_dstaddr = ia->ia_dstaddr;
569 case SIOCGIFNETMASK_IN6:
570 ifr->ifr_addr = ia->ia_prefixmask;
573 case SIOCGIFAFLAG_IN6:
574 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
577 case SIOCGIFSTAT_IN6:
580 bzero(&ifr->ifr_ifru.ifru_stat,
581 sizeof(ifr->ifr_ifru.ifru_stat));
582 ifr->ifr_ifru.ifru_stat =
583 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
586 case SIOCGIFSTAT_ICMP6:
587 bzero(&ifr->ifr_ifru.ifru_stat,
588 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
589 ifr->ifr_ifru.ifru_icmp6stat =
590 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
593 case SIOCGIFALIFETIME_IN6:
594 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
597 case SIOCSIFALIFETIME_IN6:
598 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
600 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
601 ia->ia6_lifetime.ia6t_expire =
602 time_second + ia->ia6_lifetime.ia6t_vltime;
604 ia->ia6_lifetime.ia6t_expire = 0;
605 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
606 ia->ia6_lifetime.ia6t_preferred =
607 time_second + ia->ia6_lifetime.ia6t_pltime;
609 ia->ia6_lifetime.ia6t_preferred = 0;
612 case SIOCAIFADDR_IN6:
614 int i, error = 0, iaIsNew;
615 struct nd_prefix pr0, *pr;
623 * first, make or update the interface address structure,
624 * and link it to the list.
626 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
630 * then, make the prefix on-link on the interface.
631 * XXX: we'd rather create the prefix before the address, but
632 * we need at least one address to install the corresponding
633 * interface route, so we configure the address first.
637 * convert mask to prefix length (prefixmask has already
638 * been validated in in6_update_ifa().
640 bzero(&pr0, sizeof(pr0));
642 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
644 if (pr0.ndpr_plen == 128)
645 break; /* we don't need to install a host route. */
646 pr0.ndpr_prefix = ifra->ifra_addr;
647 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
648 /* apply the mask for safety. */
649 for (i = 0; i < 4; i++) {
650 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
651 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
654 * XXX: since we don't have an API to set prefix (not address)
655 * lifetimes, we just use the same lifetimes as addresses.
656 * The (temporarily) installed lifetimes can be overridden by
657 * later advertised RAs (when accept_rtadv is non 0), which is
658 * an intended behavior.
660 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
662 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
663 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
664 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
666 /* add the prefix if there's one. */
667 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
669 * nd6_prelist_add will install the corresponding
672 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
675 log(LOG_ERR, "nd6_prelist_add succeeded but "
677 return (EINVAL); /* XXX panic here? */
680 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
682 /* XXX: this should not happen! */
683 log(LOG_ERR, "in6_control: addition succeeded, but"
686 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
687 ia->ia6_ndpr == NULL) { /* new autoconfed addr */
692 * If this is the first autoconf address from
693 * the prefix, create a temporary address
694 * as well (when specified).
696 if (ip6_use_tempaddr &&
697 pr->ndpr_refcnt == 1) {
699 if ((e = in6_tmpifadd(ia, 1)) != 0) {
700 log(LOG_NOTICE, "in6_control: "
701 "failed to create a "
702 "temporary address, "
710 * this might affect the status of autoconfigured
711 * addresses, that is, this address might make
712 * other addresses detached.
714 pfxlist_onlink_check();
716 if (error == 0 && ia) {
717 EVENTHANDLER_INVOKE(ifaddr_event, ifp,
718 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE,
724 case SIOCDIFADDR_IN6:
727 struct nd_prefix pr0, *pr;
730 * If the address being deleted is the only one that owns
731 * the corresponding prefix, expire the prefix as well.
732 * XXX: theoretically, we don't have to warry about such
733 * relationship, since we separate the address management
734 * and the prefix management. We do this, however, to provide
735 * as much backward compatibility as possible in terms of
736 * the ioctl operation.
738 bzero(&pr0, sizeof(pr0));
740 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
742 if (pr0.ndpr_plen == 128)
744 pr0.ndpr_prefix = ia->ia_addr;
745 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
746 for (i = 0; i < 4; i++) {
747 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
748 ia->ia_prefixmask.sin6_addr.s6_addr32[i];
751 * The logic of the following condition is a bit complicated.
752 * We expire the prefix when
753 * 1. the address obeys autoconfiguration and it is the
754 * only owner of the associated prefix, or
755 * 2. the address does not obey autoconf and there is no
756 * other owner of the prefix.
758 if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
759 (((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
760 pr->ndpr_refcnt == 1) ||
761 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) &&
762 pr->ndpr_refcnt == 0))) {
763 pr->ndpr_expire = 1; /* XXX: just for expiration */
767 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE,
769 in6_purgeaddr(&ia->ia_ifa);
774 if (ifp == NULL || ifp->if_ioctl == 0)
776 lwkt_serialize_enter(ifp->if_serializer);
777 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
778 lwkt_serialize_exit(ifp->if_serializer);
786 * Update parameters of an IPv6 interface address.
787 * If necessary, a new entry is created and linked into address chains.
788 * This function is separated from in6_control().
789 * XXX: should this be performed under splnet()?
792 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
793 struct in6_ifaddr *ia)
795 int error = 0, hostIsNew = 0, plen = -1;
796 struct in6_ifaddr *oia;
797 struct sockaddr_in6 dst6;
798 struct in6_addrlifetime *lt;
800 /* Validate parameters */
801 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
805 * The destination address for a p2p link must have a family
806 * of AF_UNSPEC or AF_INET6.
808 if ((ifp->if_flags & IFF_POINTOPOINT) &&
809 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
810 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
811 return (EAFNOSUPPORT);
813 * validate ifra_prefixmask. don't check sin6_family, netmask
814 * does not carry fields other than sin6_len.
816 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
819 * Because the IPv6 address architecture is classless, we require
820 * users to specify a (non 0) prefix length (mask) for a new address.
821 * We also require the prefix (when specified) mask is valid, and thus
822 * reject a non-consecutive mask.
824 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
826 if (ifra->ifra_prefixmask.sin6_len != 0) {
827 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
828 (u_char *)&ifra->ifra_prefixmask +
829 ifra->ifra_prefixmask.sin6_len);
835 * In this case, ia must not be NULL. We just use its prefix
838 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
841 * If the destination address on a p2p interface is specified,
842 * and the address is a scoped one, validate/set the scope
845 dst6 = ifra->ifra_dstaddr;
846 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
847 (dst6.sin6_family == AF_INET6)) {
850 if ((error = in6_recoverscope(&dst6,
851 &ifra->ifra_dstaddr.sin6_addr,
854 scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
855 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
856 dst6.sin6_scope_id = scopeid;
857 else if (dst6.sin6_scope_id != scopeid)
858 return (EINVAL); /* scope ID mismatch. */
859 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
862 dst6.sin6_scope_id = 0; /* XXX */
865 * The destination address can be specified only for a p2p or a
866 * loopback interface. If specified, the corresponding prefix length
869 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
870 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
871 /* XXX: noisy message */
872 log(LOG_INFO, "in6_update_ifa: a destination can be "
873 "specified for a p2p or a loopback IF only\n");
878 * The following message seems noisy, but we dare to
879 * add it for diagnosis.
881 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
882 "when dstaddr is specified\n");
886 /* lifetime consistency check */
887 lt = &ifra->ifra_lifetime;
888 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
889 && lt->ia6t_vltime + time_second < time_second) {
892 if (lt->ia6t_vltime == 0) {
894 * the following log might be noisy, but this is a typical
895 * configuration mistake or a tool's bug.
898 "in6_update_ifa: valid lifetime is 0 for %s\n",
899 ip6_sprintf(&ifra->ifra_addr.sin6_addr));
901 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
902 && lt->ia6t_pltime + time_second < time_second) {
907 * If this is a new address, allocate a new ifaddr and link it
913 * When in6_update_ifa() is called in a process of a received
914 * RA, it is called under splnet(). So, we should call malloc
917 ia = ifa_create(sizeof(*ia), M_NOWAIT);
920 /* Initialize the address and masks */
921 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
922 ia->ia_addr.sin6_family = AF_INET6;
923 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
924 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
926 * XXX: some functions expect that ifa_dstaddr is not
927 * NULL for p2p interfaces.
929 ia->ia_ifa.ifa_dstaddr
930 = (struct sockaddr *)&ia->ia_dstaddr;
932 ia->ia_ifa.ifa_dstaddr = NULL;
934 ia->ia_ifa.ifa_netmask
935 = (struct sockaddr *)&ia->ia_prefixmask;
938 if ((oia = in6_ifaddr) != NULL) {
939 for ( ; oia->ia_next; oia = oia->ia_next)
945 ifa_iflink(&ia->ia_ifa, ifp, 1);
948 /* set prefix mask */
949 if (ifra->ifra_prefixmask.sin6_len) {
951 * We prohibit changing the prefix length of an existing
953 * + such an operation should be rare in IPv6, and
954 * + the operation would confuse prefix management.
956 if (ia->ia_prefixmask.sin6_len &&
957 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
958 log(LOG_INFO, "in6_update_ifa: the prefix length of an"
959 " existing (%s) address should not be changed\n",
960 ip6_sprintf(&ia->ia_addr.sin6_addr));
964 ia->ia_prefixmask = ifra->ifra_prefixmask;
968 * If a new destination address is specified, scrub the old one and
969 * install the new destination. Note that the interface must be
970 * p2p or loopback (see the check above.)
972 if (dst6.sin6_family == AF_INET6 &&
973 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
974 &ia->ia_dstaddr.sin6_addr)) {
977 if ((ia->ia_flags & IFA_ROUTE) &&
978 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
980 log(LOG_ERR, "in6_update_ifa: failed to remove "
981 "a route to the old destination: %s\n",
982 ip6_sprintf(&ia->ia_addr.sin6_addr));
983 /* proceed anyway... */
986 ia->ia_flags &= ~IFA_ROUTE;
987 ia->ia_dstaddr = dst6;
990 /* reset the interface and routing table appropriately. */
991 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
995 * Beyond this point, we should call in6_purgeaddr upon an error,
996 * not just go to unlink.
999 #if 0 /* disable this mechanism for now */
1000 /* update prefix list */
1002 (ifra->ifra_flags & IN6_IFF_NOPFX) == 0) { /* XXX */
1005 iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen;
1006 if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) {
1007 in6_purgeaddr((struct ifaddr *)ia);
1013 if (ifp->if_flags & IFF_MULTICAST) {
1014 struct sockaddr_in6 mltaddr, mltmask;
1015 struct in6_multi *in6m;
1019 * join solicited multicast addr for new host id
1021 struct in6_addr llsol;
1022 bzero(&llsol, sizeof(struct in6_addr));
1023 llsol.s6_addr16[0] = htons(0xff02);
1024 llsol.s6_addr16[1] = htons(ifp->if_index);
1025 llsol.s6_addr32[1] = 0;
1026 llsol.s6_addr32[2] = htonl(1);
1027 llsol.s6_addr32[3] =
1028 ifra->ifra_addr.sin6_addr.s6_addr32[3];
1029 llsol.s6_addr8[12] = 0xff;
1030 in6_addmulti(&llsol, ifp, &error);
1033 "in6_update_ifa: addmulti failed for "
1034 "%s on %s (errno=%d)\n",
1035 ip6_sprintf(&llsol), if_name(ifp),
1037 in6_purgeaddr((struct ifaddr *)ia);
1042 bzero(&mltmask, sizeof(mltmask));
1043 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1044 mltmask.sin6_family = AF_INET6;
1045 mltmask.sin6_addr = in6mask32;
1048 * join link-local all-nodes address
1050 bzero(&mltaddr, sizeof(mltaddr));
1051 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1052 mltaddr.sin6_family = AF_INET6;
1053 mltaddr.sin6_addr = kin6addr_linklocal_allnodes;
1054 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
1056 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1058 rtrequest_global(RTM_ADD,
1059 (struct sockaddr *)&mltaddr,
1060 (struct sockaddr *)&ia->ia_addr,
1061 (struct sockaddr *)&mltmask,
1062 RTF_UP|RTF_CLONING); /* xxx */
1063 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1066 "in6_update_ifa: addmulti failed for "
1067 "%s on %s (errno=%d)\n",
1068 ip6_sprintf(&mltaddr.sin6_addr),
1069 if_name(ifp), error);
1074 * join node information group address
1076 #define hostnamelen strlen(hostname)
1077 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
1079 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1080 if (in6m == NULL && ia != NULL) {
1081 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1083 log(LOG_WARNING, "in6_update_ifa: "
1084 "addmulti failed for "
1085 "%s on %s (errno=%d)\n",
1086 ip6_sprintf(&mltaddr.sin6_addr),
1087 if_name(ifp), error);
1094 * join node-local all-nodes address, on loopback.
1095 * XXX: since "node-local" is obsoleted by interface-local,
1096 * we have to join the group on every interface with
1097 * some interface-boundary restriction.
1099 if (ifp->if_flags & IFF_LOOPBACK) {
1100 struct in6_ifaddr *ia_loop;
1102 struct in6_addr loop6 = kin6addr_loopback;
1103 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
1105 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes;
1107 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
1108 if (in6m == NULL && ia_loop != NULL) {
1109 rtrequest_global(RTM_ADD,
1110 (struct sockaddr *)&mltaddr,
1111 (struct sockaddr *)&ia_loop->ia_addr,
1112 (struct sockaddr *)&mltmask,
1114 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1116 log(LOG_WARNING, "in6_update_ifa: "
1117 "addmulti failed for %s on %s "
1119 ip6_sprintf(&mltaddr.sin6_addr),
1120 if_name(ifp), error);
1126 ia->ia6_flags = ifra->ifra_flags;
1127 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
1128 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
1130 ia->ia6_lifetime = ifra->ifra_lifetime;
1132 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1133 ia->ia6_lifetime.ia6t_expire =
1134 time_second + ia->ia6_lifetime.ia6t_vltime;
1136 ia->ia6_lifetime.ia6t_expire = 0;
1137 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1138 ia->ia6_lifetime.ia6t_preferred =
1139 time_second + ia->ia6_lifetime.ia6t_pltime;
1141 ia->ia6_lifetime.ia6t_preferred = 0;
1144 * Perform DAD, if needed.
1145 * XXX It may be of use, if we can administratively
1148 if (in6if_do_dad(ifp) && !(ifra->ifra_flags & IN6_IFF_NODAD)) {
1149 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1150 nd6_dad_start((struct ifaddr *)ia, NULL);
1157 * XXX: if a change of an existing address failed, keep the entry
1161 in6_unlink_ifa(ia, ifp);
1166 in6_purgeaddr(struct ifaddr *ifa)
1168 struct ifnet *ifp = ifa->ifa_ifp;
1169 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1171 /* stop DAD processing */
1175 * delete route to the destination of the address being purged.
1176 * The interface must be p2p or loopback in this case.
1178 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) {
1181 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1183 log(LOG_ERR, "in6_purgeaddr: failed to remove "
1184 "a route to the p2p destination: %s on %s, "
1186 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
1188 /* proceed anyway... */
1191 ia->ia_flags &= ~IFA_ROUTE;
1194 /* Remove ownaddr's loopback rtentry, if it exists. */
1195 in6_ifremloop(&(ia->ia_ifa));
1197 if (ifp->if_flags & IFF_MULTICAST) {
1199 * delete solicited multicast addr for deleting host id
1201 struct in6_multi *in6m;
1202 struct in6_addr llsol;
1203 bzero(&llsol, sizeof(struct in6_addr));
1204 llsol.s6_addr16[0] = htons(0xff02);
1205 llsol.s6_addr16[1] = htons(ifp->if_index);
1206 llsol.s6_addr32[1] = 0;
1207 llsol.s6_addr32[2] = htonl(1);
1208 llsol.s6_addr32[3] =
1209 ia->ia_addr.sin6_addr.s6_addr32[3];
1210 llsol.s6_addr8[12] = 0xff;
1212 IN6_LOOKUP_MULTI(llsol, ifp, in6m);
1217 in6_unlink_ifa(ia, ifp);
1221 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1224 struct in6_ifaddr *oia;
1228 ifa_ifunlink(&ia->ia_ifa, ifp);
1231 if (oia == (ia = in6_ifaddr))
1232 in6_ifaddr = ia->ia_next;
1234 while (ia->ia_next && (ia->ia_next != oia))
1237 ia->ia_next = oia->ia_next;
1240 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1244 if (oia->ia6_ifpr) { /* check for safety */
1245 plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL);
1246 iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen;
1247 in6_prefix_remove_ifid(iilen, oia);
1251 * When an autoconfigured address is being removed, release the
1252 * reference to the base prefix. Also, since the release might
1253 * affect the status of other (detached) addresses, call
1254 * pfxlist_onlink_check().
1256 if (oia->ia6_flags & IN6_IFF_AUTOCONF) {
1257 if (oia->ia6_ndpr == NULL) {
1258 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
1259 "%p has no prefix\n", oia);
1261 oia->ia6_ndpr->ndpr_refcnt--;
1262 oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
1263 oia->ia6_ndpr = NULL;
1266 pfxlist_onlink_check();
1270 * release another refcnt for the link from in6_ifaddr.
1271 * Note that we should decrement the refcnt at least once for all *BSD.
1273 ifa_destroy(&oia->ia_ifa);
1279 in6_purgeif(struct ifnet *ifp)
1281 struct ifaddr_container *ifac, *next;
1283 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
1285 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1287 in6_purgeaddr(ifac->ifa);
1295 * SIOCGLIFADDR: get first address. (?)
1296 * SIOCGLIFADDR with IFLR_PREFIX:
1297 * get first address that matches the specified prefix.
1298 * SIOCALIFADDR: add the specified address.
1299 * SIOCALIFADDR with IFLR_PREFIX:
1300 * add the specified prefix, filling hostid part from
1301 * the first link-local address. prefixlen must be <= 64.
1302 * SIOCDLIFADDR: delete the specified address.
1303 * SIOCDLIFADDR with IFLR_PREFIX:
1304 * delete the first address that matches the specified prefix.
1306 * EINVAL on invalid parameters
1307 * EADDRNOTAVAIL on prefix match failed/specified address not found
1308 * other values may be returned from in6_ioctl()
1310 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1311 * this is to accomodate address naming scheme other than RFC2374,
1313 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1314 * address encoding scheme. (see figure on page 8)
1317 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1318 struct ifnet *ifp, struct thread *td)
1320 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1321 struct sockaddr *sa;
1324 if (!data || !ifp) {
1325 panic("invalid argument to in6_lifaddr_ioctl");
1331 /* address must be specified on GET with IFLR_PREFIX */
1332 if (!(iflr->flags & IFLR_PREFIX))
1337 /* address must be specified on ADD and DELETE */
1338 sa = (struct sockaddr *)&iflr->addr;
1339 if (sa->sa_family != AF_INET6)
1341 if (sa->sa_len != sizeof(struct sockaddr_in6))
1343 /* XXX need improvement */
1344 sa = (struct sockaddr *)&iflr->dstaddr;
1345 if (sa->sa_family && sa->sa_family != AF_INET6)
1347 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1350 default: /* shouldn't happen */
1352 panic("invalid cmd to in6_lifaddr_ioctl");
1358 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1364 struct in6_aliasreq ifra;
1365 struct in6_addr *hostid = NULL;
1368 if (iflr->flags & IFLR_PREFIX) {
1370 struct sockaddr_in6 *sin6;
1373 * hostid is to fill in the hostid part of the
1374 * address. hostid points to the first link-local
1375 * address attached to the interface.
1377 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1379 return EADDRNOTAVAIL;
1380 hostid = IFA_IN6(ifa);
1382 /* prefixlen must be <= 64. */
1383 if (64 < iflr->prefixlen)
1385 prefixlen = iflr->prefixlen;
1387 /* hostid part must be zero. */
1388 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1389 if (sin6->sin6_addr.s6_addr32[2] != 0
1390 || sin6->sin6_addr.s6_addr32[3] != 0) {
1394 prefixlen = iflr->prefixlen;
1396 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1397 bzero(&ifra, sizeof(ifra));
1398 bcopy(iflr->iflr_name, ifra.ifra_name,
1399 sizeof(ifra.ifra_name));
1401 bcopy(&iflr->addr, &ifra.ifra_addr,
1402 ((struct sockaddr *)&iflr->addr)->sa_len);
1404 /* fill in hostid part */
1405 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1406 hostid->s6_addr32[2];
1407 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1408 hostid->s6_addr32[3];
1411 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
1412 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1413 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1415 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1416 hostid->s6_addr32[2];
1417 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1418 hostid->s6_addr32[3];
1422 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1423 in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1425 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1426 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1431 struct ifaddr_container *ifac;
1432 struct in6_ifaddr *ia;
1433 struct in6_addr mask, candidate, match;
1434 struct sockaddr_in6 *sin6;
1437 bzero(&mask, sizeof(mask));
1438 if (iflr->flags & IFLR_PREFIX) {
1439 /* lookup a prefix rather than address. */
1440 in6_len2mask(&mask, iflr->prefixlen);
1442 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1443 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1444 match.s6_addr32[0] &= mask.s6_addr32[0];
1445 match.s6_addr32[1] &= mask.s6_addr32[1];
1446 match.s6_addr32[2] &= mask.s6_addr32[2];
1447 match.s6_addr32[3] &= mask.s6_addr32[3];
1449 /* if you set extra bits, that's wrong */
1450 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1455 if (cmd == SIOCGLIFADDR) {
1456 /* on getting an address, take the 1st match */
1459 /* on deleting an address, do exact match */
1460 in6_len2mask(&mask, 128);
1461 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1462 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1468 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1469 struct ifaddr *ifa = ifac->ifa;
1471 if (ifa->ifa_addr->sa_family != AF_INET6)
1476 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1478 * XXX: this is adhoc, but is necessary to allow
1479 * a user to specify fe80::/64 (not /10) for a
1480 * link-local address.
1482 if (IN6_IS_ADDR_LINKLOCAL(&candidate))
1483 candidate.s6_addr16[1] = 0;
1484 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1485 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1486 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1487 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1488 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1492 return EADDRNOTAVAIL;
1493 ia = ifa2ia6(ifac->ifa);
1495 if (cmd == SIOCGLIFADDR) {
1496 struct sockaddr_in6 *s6;
1498 /* fill in the if_laddrreq structure */
1499 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1500 s6 = (struct sockaddr_in6 *)&iflr->addr;
1501 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1502 s6->sin6_addr.s6_addr16[1] = 0;
1504 in6_addr2scopeid(ifp, &s6->sin6_addr);
1506 if (ifp->if_flags & IFF_POINTOPOINT) {
1507 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1508 ia->ia_dstaddr.sin6_len);
1509 s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
1510 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1511 s6->sin6_addr.s6_addr16[1] = 0;
1513 in6_addr2scopeid(ifp,
1517 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1520 in6_mask2len(&ia->ia_prefixmask.sin6_addr,
1523 iflr->flags = ia->ia6_flags; /* XXX */
1527 struct in6_aliasreq ifra;
1529 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1530 bzero(&ifra, sizeof(ifra));
1531 bcopy(iflr->iflr_name, ifra.ifra_name,
1532 sizeof(ifra.ifra_name));
1534 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1535 ia->ia_addr.sin6_len);
1536 if (ifp->if_flags & IFF_POINTOPOINT)
1537 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1538 ia->ia_dstaddr.sin6_len);
1540 bzero(&ifra.ifra_dstaddr,
1541 sizeof(ifra.ifra_dstaddr));
1542 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1543 ia->ia_prefixmask.sin6_len);
1545 ifra.ifra_flags = ia->ia6_flags;
1546 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1552 return EOPNOTSUPP; /* just for safety */
1556 * Initialize an interface's intetnet6 address
1557 * and routing table entry.
1560 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6,
1563 int error = 0, plen, ifacount = 0;
1564 struct ifaddr_container *ifac;
1567 * Give the interface a chance to initialize
1568 * if this is its first address,
1569 * and to validate the address if necessary.
1571 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1572 if (ifac->ifa->ifa_addr == NULL)
1573 continue; /* just for safety */
1574 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1579 lwkt_serialize_enter(ifp->if_serializer);
1581 ia->ia_addr = *sin6;
1583 if (ifacount <= 1 && ifp->if_ioctl &&
1584 (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia,
1585 (struct ucred *)NULL))) {
1586 lwkt_serialize_exit(ifp->if_serializer);
1589 lwkt_serialize_exit(ifp->if_serializer);
1591 ia->ia_ifa.ifa_metric = ifp->if_metric;
1593 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1597 * If the destination address is specified for a point-to-point
1598 * interface, install a route to the destination as an interface
1601 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1602 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
1603 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
1604 RTF_UP | RTF_HOST)) != 0)
1606 ia->ia_flags |= IFA_ROUTE;
1610 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1612 ia->ia_ifa.ifa_flags |= RTF_CLONING;
1615 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1617 /* set the rtrequest function to create llinfo */
1618 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
1619 in6_ifaddloop(&(ia->ia_ifa));
1625 struct in6_multi_mship *
1626 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp)
1628 struct in6_multi_mship *imm;
1630 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT);
1635 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp);
1636 if (!imm->i6mm_maddr) {
1637 /* *errorp is alrady set */
1638 kfree(imm, M_IPMADDR);
1645 in6_leavegroup(struct in6_multi_mship *imm)
1648 if (imm->i6mm_maddr)
1649 in6_delmulti(imm->i6mm_maddr);
1650 kfree(imm, M_IPMADDR);
1655 * Add an address to the list of IP6 multicast addresses for a
1659 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp)
1661 struct in6_multi *in6m;
1662 struct sockaddr_in6 sin6;
1663 struct ifmultiaddr *ifma;
1670 * Call generic routine to add membership or increment
1671 * refcount. It wants addresses in the form of a sockaddr,
1672 * so we build one here (being careful to zero the unused bytes).
1674 bzero(&sin6, sizeof sin6);
1675 sin6.sin6_family = AF_INET6;
1676 sin6.sin6_len = sizeof sin6;
1677 sin6.sin6_addr = *maddr6;
1678 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
1685 * If ifma->ifma_protospec is null, then if_addmulti() created
1686 * a new record. Otherwise, we are done.
1688 if (ifma->ifma_protospec != 0) {
1690 return ifma->ifma_protospec;
1693 /* XXX - if_addmulti uses M_WAITOK. Can this really be called
1694 at interrupt time? If so, need to fix if_addmulti. XXX */
1695 in6m = (struct in6_multi *)kmalloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT);
1701 bzero(in6m, sizeof *in6m);
1702 in6m->in6m_addr = *maddr6;
1703 in6m->in6m_ifp = ifp;
1704 in6m->in6m_ifma = ifma;
1705 ifma->ifma_protospec = in6m;
1706 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
1709 * Let MLD6 know that we have joined a new IP6 multicast
1712 mld6_start_listening(in6m);
1718 * Delete a multicast address record.
1721 in6_delmulti(struct in6_multi *in6m)
1723 struct ifmultiaddr *ifma = in6m->in6m_ifma;
1727 if (ifma->ifma_refcount == 1) {
1729 * No remaining claims to this record; let MLD6 know
1730 * that we are leaving the multicast group.
1732 mld6_stop_listening(in6m);
1733 ifma->ifma_protospec = 0;
1734 LIST_REMOVE(in6m, in6m_entry);
1735 kfree(in6m, M_IPMADDR);
1737 /* XXX - should be separate API for when we have an ifma? */
1738 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
1743 * Find an IPv6 interface link-local address specific to an interface.
1746 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1748 struct ifaddr_container *ifac;
1750 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1751 struct ifaddr *ifa = ifac->ifa;
1753 if (ifa->ifa_addr == NULL)
1754 continue; /* just for safety */
1755 if (ifa->ifa_addr->sa_family != AF_INET6)
1757 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1758 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1765 return ((struct in6_ifaddr *)(ifac->ifa));
1772 * find the internet address corresponding to a given interface and address.
1775 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1777 struct ifaddr_container *ifac;
1779 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1780 struct ifaddr *ifa = ifac->ifa;
1782 if (ifa->ifa_addr == NULL)
1783 continue; /* just for safety */
1784 if (ifa->ifa_addr->sa_family != AF_INET6)
1786 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
1790 return ((struct in6_ifaddr *)(ifac->ifa));
1796 * find the internet address on a given interface corresponding to a neighbor's
1800 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr)
1803 struct in6_ifaddr *ia;
1804 struct ifaddr_container *ifac;
1806 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1809 if (ifa->ifa_addr == NULL)
1810 continue; /* just for safety */
1811 if (ifa->ifa_addr->sa_family != AF_INET6)
1813 ia = (struct in6_ifaddr *)ifa;
1814 if (IN6_ARE_MASKED_ADDR_EQUAL(addr,
1815 &ia->ia_addr.sin6_addr,
1816 &ia->ia_prefixmask.sin6_addr))
1824 * Convert IP6 address to printable (loggable) representation.
1826 static char digits[] = "0123456789abcdef";
1827 static int ip6round = 0;
1829 ip6_sprintf(const struct in6_addr *addr)
1831 static char ip6buf[8][48];
1834 const u_short *a = (const u_short *)addr;
1838 ip6round = (ip6round + 1) & 7;
1839 cp = ip6buf[ip6round];
1841 for (i = 0; i < 8; i++) {
1852 if (dcolon == 0 && *(a + 1) == 0) {
1864 d = (const u_char *)a;
1865 *cp++ = digits[*d >> 4];
1866 *cp++ = digits[*d++ & 0xf];
1867 *cp++ = digits[*d >> 4];
1868 *cp++ = digits[*d & 0xf];
1873 return (ip6buf[ip6round]);
1877 in6_localaddr(struct in6_addr *in6)
1879 struct in6_ifaddr *ia;
1881 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1884 for (ia = in6_ifaddr; ia; ia = ia->ia_next)
1885 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1886 &ia->ia_prefixmask.sin6_addr))
1893 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1895 struct in6_ifaddr *ia;
1897 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
1898 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
1900 (ia->ia6_flags & IN6_IFF_DEPRECATED))
1901 return (1); /* true */
1903 /* XXX: do we still have to go thru the rest of the list? */
1906 return (0); /* false */
1910 * return length of part which dst and src are equal
1914 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1917 u_char *s = (u_char *)src, *d = (u_char *)dst;
1918 u_char *lim = s + 16, r;
1921 if ((r = (*d++ ^ *s++)) != 0) {
1932 /* XXX: to be scope conscious */
1934 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1936 int bytelen, bitlen;
1939 if (0 > len || len > 128) {
1940 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1948 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1950 if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
1951 p2->s6_addr[bytelen] >> (8 - bitlen))
1958 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1960 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1961 int bytelen, bitlen, i;
1964 if (0 > len || len > 128) {
1965 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1970 bzero(maskp, sizeof(*maskp));
1973 for (i = 0; i < bytelen; i++)
1974 maskp->s6_addr[i] = 0xff;
1976 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1980 * return the best address out of the same scope
1983 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst)
1985 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
1988 struct in6_ifaddr *ifa_best = NULL;
1992 kprintf("in6_ifawithscope: output interface is not specified\n");
1998 * We search for all addresses on all interfaces from the beginning.
1999 * Comparing an interface with the outgoing interface will be done
2000 * only at the final stage of tiebreaking.
2002 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
2004 struct ifaddr_container *ifac;
2007 * We can never take an address that breaks the scope zone
2008 * of the destination.
2010 if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
2013 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2014 int tlen = -1, dscopecmp, bscopecmp, matchcmp;
2015 struct ifaddr *ifa = ifac->ifa;
2017 if (ifa->ifa_addr->sa_family != AF_INET6)
2020 src_scope = in6_addrscope(IFA_IN6(ifa));
2023 * Don't use an address before completing DAD
2024 * nor a duplicated address.
2026 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2030 /* XXX: is there any case to allow anycasts? */
2031 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2035 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2040 * If this is the first address we find,
2043 if (ifa_best == NULL)
2047 * ifa_best is never NULL beyond this line except
2048 * within the block labeled "replace".
2052 * If ifa_best has a smaller scope than dst and
2053 * the current address has a larger one than
2054 * (or equal to) dst, always replace ifa_best.
2055 * Also, if the current address has a smaller scope
2056 * than dst, ignore it unless ifa_best also has a
2058 * Consequently, after the two if-clause below,
2059 * the followings must be satisfied:
2060 * (scope(src) < scope(dst) &&
2061 * scope(best) < scope(dst))
2063 * (scope(best) >= scope(dst) &&
2064 * scope(src) >= scope(dst))
2066 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
2067 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
2068 goto replace; /* (A) */
2069 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
2070 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
2074 * A deprecated address SHOULD NOT be used in new
2075 * communications if an alternate (non-deprecated)
2076 * address is available and has sufficient scope.
2077 * RFC 2462, Section 5.5.4.
2079 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2080 IN6_IFF_DEPRECATED) {
2082 * Ignore any deprecated addresses if
2083 * specified by configuration.
2085 if (!ip6_use_deprecated)
2089 * If we have already found a non-deprecated
2090 * candidate, just ignore deprecated addresses.
2092 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED))
2097 * A non-deprecated address is always preferred
2098 * to a deprecated one regardless of scopes and
2099 * address matching (Note invariants ensured by the
2100 * conditions (A) and (B) above.)
2102 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
2103 !(((struct in6_ifaddr *)ifa)->ia6_flags &
2104 IN6_IFF_DEPRECATED))
2108 * When we use temporary addresses described in
2109 * RFC 3041, we prefer temporary addresses to
2110 * public autoconf addresses. Again, note the
2111 * invariants from (A) and (B). Also note that we
2112 * don't have any preference between static addresses
2113 * and autoconf addresses (despite of whether or not
2114 * the latter is temporary or public.)
2116 if (ip6_use_tempaddr) {
2117 struct in6_ifaddr *ifat;
2119 ifat = (struct in6_ifaddr *)ifa;
2120 if ((ifa_best->ia6_flags &
2121 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2122 == IN6_IFF_AUTOCONF &&
2124 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2125 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
2128 if ((ifa_best->ia6_flags &
2129 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2130 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
2132 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2133 == IN6_IFF_AUTOCONF) {
2139 * At this point, we have two cases:
2140 * 1. we are looking at a non-deprecated address,
2141 * and ifa_best is also non-deprecated.
2142 * 2. we are looking at a deprecated address,
2143 * and ifa_best is also deprecated.
2144 * Also, we do not have to consider a case where
2145 * the scope of if_best is larger(smaller) than dst and
2146 * the scope of the current address is smaller(larger)
2147 * than dst. Such a case has already been covered.
2148 * Tiebreaking is done according to the following
2150 * - the scope comparison between the address and
2152 * - the scope comparison between the address and
2153 * ifa_best (bscopecmp)
2154 * - if the address match dst longer than ifa_best
2156 * - if the address is on the outgoing I/F (outI/F)
2158 * Roughly speaking, the selection policy is
2159 * - the most important item is scope. The same scope
2160 * is best. Then search for a larger scope.
2161 * Smaller scopes are the last resort.
2162 * - A deprecated address is chosen only when we have
2163 * no address that has an enough scope, but is
2164 * prefered to any addresses of smaller scopes
2165 * (this must be already done above.)
2166 * - addresses on the outgoing I/F are preferred to
2167 * ones on other interfaces if none of above
2168 * tiebreaks. In the table below, the column "bI"
2169 * means if the best_ifa is on the outgoing
2170 * interface, and the column "sI" means if the ifa
2171 * is on the outgoing interface.
2172 * - If there is no other reasons to choose one,
2173 * longest address match against dst is considered.
2175 * The precise decision table is as follows:
2176 * dscopecmp bscopecmp match bI oI | replace?
2177 * N/A equal N/A Y N | No (1)
2178 * N/A equal N/A N Y | Yes (2)
2179 * N/A equal larger N/A | Yes (3)
2180 * N/A equal !larger N/A | No (4)
2181 * larger larger N/A N/A | No (5)
2182 * larger smaller N/A N/A | Yes (6)
2183 * smaller larger N/A N/A | Yes (7)
2184 * smaller smaller N/A N/A | No (8)
2185 * equal smaller N/A N/A | Yes (9)
2186 * equal larger (already done at A above)
2188 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
2189 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
2191 if (bscopecmp == 0) {
2192 struct ifnet *bifp = ifa_best->ia_ifp;
2194 if (bifp == oifp && ifp != oifp) /* (1) */
2196 if (bifp != oifp && ifp == oifp) /* (2) */
2200 * Both bifp and ifp are on the outgoing
2201 * interface, or both two are on a different
2202 * interface from the outgoing I/F.
2203 * now we need address matching against dst
2206 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2207 matchcmp = tlen - blen;
2208 if (matchcmp > 0) /* (3) */
2212 if (dscopecmp > 0) {
2213 if (bscopecmp > 0) /* (5) */
2215 goto replace; /* (6) */
2217 if (dscopecmp < 0) {
2218 if (bscopecmp > 0) /* (7) */
2223 /* now dscopecmp must be 0 */
2225 goto replace; /* (9) */
2228 ifa_best = (struct in6_ifaddr *)ifa;
2229 blen = tlen >= 0 ? tlen :
2230 in6_matchlen(IFA_IN6(ifa), dst);
2231 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
2235 /* count statistics for future improvements */
2236 if (ifa_best == NULL)
2237 ip6stat.ip6s_sources_none++;
2239 if (oifp == ifa_best->ia_ifp)
2240 ip6stat.ip6s_sources_sameif[best_scope]++;
2242 ip6stat.ip6s_sources_otherif[best_scope]++;
2244 if (best_scope == dst_scope)
2245 ip6stat.ip6s_sources_samescope[best_scope]++;
2247 ip6stat.ip6s_sources_otherscope[best_scope]++;
2249 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
2250 ip6stat.ip6s_sources_deprecated[best_scope]++;
2257 * return the best address out of the same scope. if no address was
2258 * found, return the first valid address from designated IF.
2261 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2263 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2264 struct ifaddr_container *ifac;
2265 struct in6_ifaddr *besta = 0;
2266 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2268 dep[0] = dep[1] = NULL;
2271 * We first look for addresses in the same scope.
2272 * If there is one, return it.
2273 * If two or more, return one which matches the dst longest.
2274 * If none, return one of global addresses assigned other ifs.
2276 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2277 struct ifaddr *ifa = ifac->ifa;
2279 if (ifa->ifa_addr->sa_family != AF_INET6)
2281 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2282 continue; /* XXX: is there any case to allow anycast? */
2283 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2284 continue; /* don't use this interface */
2285 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2287 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2288 if (ip6_use_deprecated)
2289 dep[0] = (struct in6_ifaddr *)ifa;
2293 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2295 * call in6_matchlen() as few as possible
2299 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2300 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2303 besta = (struct in6_ifaddr *)ifa;
2306 besta = (struct in6_ifaddr *)ifa;
2312 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2313 struct ifaddr *ifa = ifac->ifa;
2315 if (ifa->ifa_addr->sa_family != AF_INET6)
2317 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2318 continue; /* XXX: is there any case to allow anycast? */
2319 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2320 continue; /* don't use this interface */
2321 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2323 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2324 if (ip6_use_deprecated)
2325 dep[1] = (struct in6_ifaddr *)ifa;
2329 return (struct in6_ifaddr *)ifa;
2332 /* use the last-resort values, that are, deprecated addresses */
2342 * perform DAD when interface becomes IFF_UP.
2345 in6_if_up(struct ifnet *ifp)
2347 struct ifaddr_container *ifac;
2348 struct in6_ifaddr *ia;
2349 int dad_delay; /* delay ticks before DAD output */
2352 * special cases, like 6to4, are handled in in6_ifattach
2354 in6_ifattach(ifp, NULL);
2357 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2358 struct ifaddr *ifa = ifac->ifa;
2360 if (ifa->ifa_addr->sa_family != AF_INET6)
2362 ia = (struct in6_ifaddr *)ifa;
2363 if (ia->ia6_flags & IN6_IFF_TENTATIVE)
2364 nd6_dad_start(ifa, &dad_delay);
2369 in6if_do_dad(struct ifnet *ifp)
2371 if (ifp->if_flags & IFF_LOOPBACK)
2374 switch (ifp->if_type) {
2380 * These interfaces do not have the IFF_LOOPBACK flag,
2381 * but loop packets back. We do not have to do DAD on such
2382 * interfaces. We should even omit it, because loop-backed
2383 * NS would confuse the DAD procedure.
2388 * Our DAD routine requires the interface up and running.
2389 * However, some interfaces can be up before the RUNNING
2390 * status. Additionaly, users may try to assign addresses
2391 * before the interface becomes up (or running).
2392 * We simply skip DAD in such a case as a work around.
2393 * XXX: we should rather mark "tentative" on such addresses,
2394 * and do DAD after the interface becomes ready.
2396 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2397 (IFF_UP|IFF_RUNNING))
2405 * Calculate max IPv6 MTU through all the interfaces and store it
2411 unsigned long maxmtu = 0;
2414 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
2416 if (!(ifp->if_flags & IFF_LOOPBACK) &&
2417 ND_IFINFO(ifp)->linkmtu > maxmtu)
2418 maxmtu = ND_IFINFO(ifp)->linkmtu;
2420 if (maxmtu) /* update only when maxmtu is positive */
2421 in6_maxmtu = maxmtu;
2425 in6_domifattach(struct ifnet *ifp)
2427 struct in6_ifextra *ext;
2429 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2430 bzero(ext, sizeof(*ext));
2432 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat),
2433 M_IFADDR, M_WAITOK);
2434 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2437 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat),
2438 M_IFADDR, M_WAITOK);
2439 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2441 ext->nd_ifinfo = nd6_ifattach(ifp);
2442 ext->scope6_id = scope6_ifattach(ifp);
2447 in6_domifdetach(struct ifnet *ifp, void *aux)
2449 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2450 scope6_ifdetach(ext->scope6_id);
2451 nd6_ifdetach(ext->nd_ifinfo);
2452 kfree(ext->in6_ifstat, M_IFADDR);
2453 kfree(ext->icmp6_ifstat, M_IFADDR);
2454 kfree(ext, M_IFADDR);
2458 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2459 * v4 mapped addr or v4 compat addr
2462 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2464 bzero(sin, sizeof(*sin));
2465 sin->sin_len = sizeof(struct sockaddr_in);
2466 sin->sin_family = AF_INET;
2467 sin->sin_port = sin6->sin6_port;
2468 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2471 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2473 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2475 bzero(sin6, sizeof(*sin6));
2476 sin6->sin6_len = sizeof(struct sockaddr_in6);
2477 sin6->sin6_family = AF_INET6;
2478 sin6->sin6_port = sin->sin_port;
2479 sin6->sin6_addr.s6_addr32[0] = 0;
2480 sin6->sin6_addr.s6_addr32[1] = 0;
2481 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2482 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2485 /* Convert sockaddr_in6 into sockaddr_in. */
2487 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2489 struct sockaddr_in *sin_p;
2490 struct sockaddr_in6 sin6;
2493 * Save original sockaddr_in6 addr and convert it
2496 sin6 = *(struct sockaddr_in6 *)nam;
2497 sin_p = (struct sockaddr_in *)nam;
2498 in6_sin6_2_sin(sin_p, &sin6);
2501 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2503 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2505 struct sockaddr_in *sin_p;
2506 struct sockaddr_in6 *sin6_p;
2508 MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
2510 sin_p = (struct sockaddr_in *)*nam;
2511 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2512 FREE(*nam, M_SONAME);
2513 *nam = (struct sockaddr *)sin6_p;