1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */
2 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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34 * Copyright (c) 1982, 1986, 1991, 1993
35 * The Regents of the University of California. All rights reserved.
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38 * modification, are permitted provided that the following conditions
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41 * notice, this list of conditions and the following disclaimer.
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46 * may be used to endorse or promote products derived from this software
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51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * @(#)in.c 8.2 (Berkeley) 11/15/93
65 #include "opt_inet6.h"
67 #include <sys/param.h>
68 #include <sys/errno.h>
69 #include <sys/malloc.h>
70 #include <sys/socket.h>
71 #include <sys/socketvar.h>
72 #include <sys/sockio.h>
73 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/syslog.h>
81 #include <sys/thread2.h>
82 #include <sys/msgport2.h>
85 #include <net/if_types.h>
86 #include <net/route.h>
87 #include <net/if_dl.h>
88 #include <net/netmsg2.h>
89 #include <net/netisr2.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 (u_long, caddr_t, struct ifnet *,
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 static void in6_control_internal_dispatch(netmsg_t);
139 static int in6_control_internal(u_long, caddr_t, struct ifnet *,
142 struct in6_multihead in6_multihead; /* XXX BSS initialization */
145 * Subroutine for in6_ifaddloop() and in6_ifremloop().
146 * This routine does actual work.
149 in6_ifloop_request(int cmd, struct ifaddr *ifa,
150 void (*callback)(int, int, struct rt_addrinfo *, struct rtentry *, void *))
152 struct sockaddr_in6 all1_sa;
153 struct rt_addrinfo rtinfo;
156 bzero(&all1_sa, sizeof(all1_sa));
157 all1_sa.sin6_family = AF_INET6;
158 all1_sa.sin6_len = sizeof(struct sockaddr_in6);
159 all1_sa.sin6_addr = in6mask128;
162 * We specify the address itself as the gateway, and set the
163 * RTF_LLINFO flag, so that the corresponding host route would have
164 * the flag, and thus applications that assume traditional behavior
165 * would be happy. Note that we assume the caller of the function
166 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
167 * which changes the outgoing interface to the loopback interface.
169 bzero(&rtinfo, sizeof(struct rt_addrinfo));
170 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr;
171 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
172 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa;
173 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO;
175 error = rtrequest1_global(cmd, &rtinfo, callback, ifa, RTREQ_PRIO_NORM);
177 log(LOG_ERR, "in6_ifloop_request: "
178 "%s operation failed for %s (errno=%d)\n",
179 cmd == RTM_ADD ? "ADD" : cmd == RTM_DELETE ? "DELETE" : "GET",
180 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
186 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
187 struct rtentry *rt, void *arg)
189 struct ifaddr *ifa = arg;
195 * Make sure rt_ifa be equal to IFA, the second argument of the
197 * We need this because when we refer to rt_ifa->ia6_flags in
198 * ip6_input, we assume that the rt_ifa points to the address instead
199 * of the loopback address.
201 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) {
210 * Report the addition/removal of the address to the routing socket,
211 * unless the address is marked as tentative, where it will be reported
212 * once DAD completes.
213 * XXX: since we called rtinit for a p2p interface with a destination,
214 * we end up reporting twice in such a case. Should we rather
215 * omit the second report?
219 struct in6_ifaddr *ia6 = (struct in6_ifaddr *)ifa;
221 if (cmd != RTM_ADD ||
222 !(ia6->ia6_flags & IN6_IFF_TENTATIVE))
223 rt_newaddrmsg(cmd, ifa, error, rt);
225 if (cmd == RTM_DELETE) {
226 if (rt->rt_refcnt == 0) {
233 /* no way to return any new error */
238 in6_newaddrmsg_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
239 struct rtentry *rt, void *arg)
241 struct ifaddr *ifa = arg;
243 if (error == 0 && rt != NULL && mycpuid == 0)
244 rt_newaddrmsg(RTM_ADD, ifa, error, rt);
248 in6_newaddrmsg(struct ifaddr *ifa)
250 in6_ifloop_request(RTM_GET, ifa, in6_newaddrmsg_callback);
254 * Add ownaddr as loopback rtentry. We previously add the route only if
255 * necessary (ex. on a p2p link). However, since we now manage addresses
256 * separately from prefixes, we should always add the route. We can't
257 * rely on the cloning mechanism from the corresponding interface route
261 in6_ifaddloop(struct ifaddr *ifa)
265 /* If there is no loopback entry, allocate one. */
266 rt = rtpurelookup(ifa->ifa_addr);
267 if (rt == NULL || !(rt->rt_flags & RTF_HOST) ||
268 !(rt->rt_ifp->if_flags & IFF_LOOPBACK))
269 in6_ifloop_request(RTM_ADD, ifa, in6_ifloop_request_callback);
275 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
279 in6_ifremloop(struct ifaddr *ifa)
281 struct in6_ifaddr *ia;
286 * Some of BSD variants do not remove cloned routes
287 * from an interface direct route, when removing the direct route
288 * (see comments in net/net_osdep.h). Even for variants that do remove
289 * cloned routes, they could fail to remove the cloned routes when
290 * we handle multple addresses that share a common prefix.
291 * So, we should remove the route corresponding to the deleted address
292 * regardless of the result of in6_is_ifloop_auto().
296 * Delete the entry only if exact one ifa exists. More than one ifa
297 * can exist if we assign a same single address to multiple
298 * (probably p2p) interfaces.
299 * XXX: we should avoid such a configuration in IPv6...
301 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
302 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
311 * Before deleting, check if a corresponding loopbacked host
312 * route surely exists. With this check, we can avoid to
313 * delete an interface direct route whose destination is same
314 * as the address being removed. This can happen when remofing
315 * a subnet-router anycast address on an interface attahced
316 * to a shared medium.
318 rt = rtpurelookup(ifa->ifa_addr);
319 if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
320 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
322 in6_ifloop_request(RTM_DELETE, ifa,
323 in6_ifloop_request_callback);
329 in6_mask2len(const struct in6_addr *mask, const u_char *lim0)
332 const u_char *lim = lim0, *p;
335 lim0 - (const u_char *)mask > sizeof(*mask)) {
336 /* Ignore the scope_id part */
337 lim = (const u_char *)mask + sizeof(*mask);
339 for (p = (const u_char *)mask; p < lim; x++, p++) {
345 for (y = 0; y < 8; y++) {
346 if ((*p & (0x80 >> y)) == 0)
352 * When the limit pointer is given, do a stricter check on the
356 if (y != 0 && (*p & (0x00ff >> y)) != 0)
358 for (p = p + 1; p < lim; p++)
366 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
367 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
370 in6_control_dispatch(netmsg_t msg)
374 error = in6_control(msg->control.nm_cmd,
375 msg->control.nm_data,
378 lwkt_replymsg(&msg->control.base.lmsg, error);
382 in6_control(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td)
384 struct netmsg_pru_control msg;
387 case SIOCSIFPREFIX_IN6:
388 case SIOCDIFPREFIX_IN6:
389 case SIOCAIFPREFIX_IN6:
390 case SIOCCIFPREFIX_IN6:
391 case SIOCSGIFPREFIX_IN6:
392 case SIOCGIFPREFIX_IN6:
393 log(LOG_NOTICE, "prefix ioctls are now invalidated. "
394 "please use ifconfig.\n");
397 case SIOCSIFADDR_IN6:
398 case SIOCSIFDSTADDR_IN6:
399 case SIOCSIFNETMASK_IN6:
401 * Since IPv6 allows a node to assign multiple addresses
402 * on a single interface, SIOCSIFxxx ioctls are not suitable
403 * and should be unused.
405 /* We decided to obsolete this command (20000704) */
413 * Do not pass those ioctl to driver handler since they are not
414 * properly setup. Instead just error out.
419 case SIOCGETSGCNT_IN6:
420 case SIOCGETMIFCNT_IN6:
422 case SIOCAADDRCTL_POLICY:
423 case SIOCDADDRCTL_POLICY:
425 case SIOCSNDFLUSH_IN6:
426 case SIOCSPFXFLUSH_IN6:
427 case SIOCSRTRFLUSH_IN6:
428 case SIOCSDEFIFACE_IN6:
429 case SIOCSIFINFO_FLAGS:
430 case OSIOCGIFINFO_IN6:
431 case SIOCGIFINFO_IN6:
434 case SIOCGNBRINFO_IN6:
435 case SIOCGDEFIFACE_IN6:
443 case SIOCSIFALIFETIME_IN6:
444 case SIOCAIFADDR_IN6:
445 case SIOCDIFADDR_IN6:
447 * Dispatch these SIOCs to netisr0.
449 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
450 in6_control_internal_dispatch);
455 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
456 return msg.base.lmsg.ms_error;
459 return in6_control_internal(cmd, data, ifp, td);
464 in6_control_internal_dispatch(netmsg_t msg)
468 error = in6_control_internal(msg->control.nm_cmd, msg->control.nm_data,
469 msg->control.nm_ifp, msg->control.nm_td);
470 lwkt_replymsg(&msg->lmsg, error);
474 in6_control_internal(u_long cmd, caddr_t data, struct ifnet *ifp,
477 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
478 struct in6_ifaddr *ia = NULL;
479 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
480 struct in6_ifextra *xtra;
481 boolean_t privileged;
485 if (priv_check(td, PRIV_ROOT) == 0)
497 return in6_lifaddr_ioctl(cmd, data, ifp, td);
501 case SIOCGETSGCNT_IN6:
502 case SIOCGETMIFCNT_IN6:
503 return (mrt6_ioctl(cmd, data));
507 case SIOCAADDRCTL_POLICY:
508 case SIOCDADDRCTL_POLICY:
511 return (in6_src_ioctl(cmd, data));
518 case SIOCSNDFLUSH_IN6:
519 case SIOCSPFXFLUSH_IN6:
520 case SIOCSRTRFLUSH_IN6:
521 case SIOCSDEFIFACE_IN6:
522 case SIOCSIFINFO_FLAGS:
526 case OSIOCGIFINFO_IN6:
527 case SIOCGIFINFO_IN6:
530 case SIOCGNBRINFO_IN6:
531 case SIOCGDEFIFACE_IN6:
532 return (nd6_ioctl(cmd, data, ifp));
539 return (scope6_set(ifp,
540 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
543 return (scope6_get(ifp,
544 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
547 return (scope6_get_default((struct scope6_id *)
548 ifr->ifr_ifru.ifru_scope_id));
552 * Find address for this interface, if it exists.
554 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
555 struct sockaddr_in6 *sa6 =
556 (struct sockaddr_in6 *)&ifra->ifra_addr;
558 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
559 if (sa6->sin6_addr.s6_addr16[1] == 0) {
560 /* Link ID is not embedded by the user */
561 sa6->sin6_addr.s6_addr16[1] =
562 htons(ifp->if_index);
563 } else if (sa6->sin6_addr.s6_addr16[1] !=
564 htons(ifp->if_index)) {
565 /* Link ID contradicts */
568 if (sa6->sin6_scope_id) {
569 if (sa6->sin6_scope_id !=
570 (u_int32_t)ifp->if_index)
572 sa6->sin6_scope_id = 0; /* XXX: good way? */
575 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
579 case SIOCDIFADDR_IN6:
581 * For IPv4, we look for existing in_ifaddr here to allow
582 * "ifconfig if0 delete" to remove first IPv4 address on the
583 * interface. For IPv6, as the spec allow multiple interface
584 * address from the day one, we consider "remove the first one"
585 * semantics to be not preferable.
588 return (EADDRNOTAVAIL);
590 case SIOCAIFADDR_IN6:
592 * We always require users to specify a valid IPv6 address for
593 * the corresponding operation.
595 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
596 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
597 return (EAFNOSUPPORT);
602 case SIOCGIFADDR_IN6:
603 /* This interface is basically deprecated. Use SIOCGIFCONF. */
605 case SIOCGIFAFLAG_IN6:
606 case SIOCGIFNETMASK_IN6:
607 case SIOCGIFDSTADDR_IN6:
608 case SIOCGIFALIFETIME_IN6:
609 /* Must think again about its semantics */
611 return (EADDRNOTAVAIL);
614 case SIOCSIFALIFETIME_IN6:
616 const struct in6_addrlifetime *lt;
621 return (EADDRNOTAVAIL);
622 /* Sanity for overflow - beware unsigned */
623 lt = &ifr->ifr_ifru.ifru_lifetime;
624 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
625 lt->ia6t_vltime + time_uptime < time_uptime)
627 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
628 lt->ia6t_pltime + time_uptime < time_uptime)
635 case SIOCGIFADDR_IN6:
636 ifr->ifr_addr = ia->ia_addr;
639 case SIOCGIFDSTADDR_IN6:
640 if (!(ifp->if_flags & IFF_POINTOPOINT))
643 * XXX: Should we check if ifa_dstaddr is NULL and return
646 ifr->ifr_dstaddr = ia->ia_dstaddr;
649 case SIOCGIFNETMASK_IN6:
650 ifr->ifr_addr = ia->ia_prefixmask;
653 case SIOCGIFAFLAG_IN6:
654 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
657 case SIOCGIFSTAT_IN6:
658 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
660 bzero(&ifr->ifr_ifru.ifru_stat,
661 sizeof(ifr->ifr_ifru.ifru_stat));
662 ifr->ifr_ifru.ifru_stat = *xtra->in6_ifstat;
665 case SIOCGIFSTAT_ICMP6:
666 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
668 bzero(&ifr->ifr_ifru.ifru_stat,
669 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
670 ifr->ifr_ifru.ifru_icmp6stat = *xtra->icmp6_ifstat;
673 case SIOCGIFALIFETIME_IN6:
674 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
677 case SIOCSIFALIFETIME_IN6:
678 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
679 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
680 ia->ia6_lifetime.ia6t_expire =
681 time_uptime + ia->ia6_lifetime.ia6t_vltime;
683 ia->ia6_lifetime.ia6t_expire = 0;
685 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
686 ia->ia6_lifetime.ia6t_preferred =
687 time_uptime + ia->ia6_lifetime.ia6t_pltime;
689 ia->ia6_lifetime.ia6t_preferred = 0;
693 case SIOCAIFADDR_IN6:
695 int i, error = 0, iaIsNew;
696 struct nd_prefix pr0, *pr;
704 * First, make or update the interface address structure,
705 * and link it to the list.
707 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
711 * Then, make the prefix on-link on the interface.
712 * XXX: We'd rather create the prefix before the address, but
713 * we need at least one address to install the corresponding
714 * interface route, so we configure the address first.
718 * Convert mask to prefix length (prefixmask has already
719 * been validated in in6_update_ifa().
721 bzero(&pr0, sizeof(pr0));
723 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
725 if (pr0.ndpr_plen == 128)
726 break; /* no need to install a host route. */
727 pr0.ndpr_prefix = ifra->ifra_addr;
728 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
729 /* Apply the mask for safety. */
730 for (i = 0; i < 4; i++) {
731 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
732 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
735 * XXX: Since we don't have an API to set prefix (not address)
736 * lifetimes, we just use the same lifetimes as addresses.
737 * The (temporarily) installed lifetimes can be overridden by
738 * later advertised RAs (when accept_rtadv is non 0), which is
739 * an intended behavior.
741 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
743 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
744 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
745 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
747 /* Add the prefix if there's one. */
748 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
750 * nd6_prelist_add will install the corresponding
753 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
756 log(LOG_ERR, "nd6_prelist_add succeeded but "
758 return (EINVAL); /* XXX panic here? */
762 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
764 /* XXX: This should not happen! */
765 log(LOG_ERR, "in6_control: addition succeeded, but"
768 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
769 ia->ia6_ndpr == NULL) {
771 * New autoconf address
777 * If this is the first autoconf address from
778 * the prefix, create a temporary address
779 * as well (when specified).
781 if (ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
784 if ((e = in6_tmpifadd(ia, 1)) != 0) {
785 log(LOG_NOTICE, "in6_control: "
786 "failed to create a "
787 "temporary address, "
794 * This might affect the status of autoconfigured
795 * addresses, that is, this address might make
796 * other addresses detached.
798 pfxlist_onlink_check();
800 if (error == 0 && ia) {
801 EVENTHANDLER_INVOKE(ifaddr_event, ifp,
802 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE,
808 case SIOCDIFADDR_IN6:
811 struct nd_prefix pr0, *pr;
814 * If the address being deleted is the only one that owns
815 * the corresponding prefix, expire the prefix as well.
816 * XXX: Theoretically, we don't have to warry about such
817 * relationship, since we separate the address management
818 * and the prefix management. We do this, however, to provide
819 * as much backward compatibility as possible in terms of
820 * the ioctl operation.
822 bzero(&pr0, sizeof(pr0));
824 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
826 if (pr0.ndpr_plen == 128)
828 pr0.ndpr_prefix = ia->ia_addr;
829 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
830 for (i = 0; i < 4; i++) {
831 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
832 ia->ia_prefixmask.sin6_addr.s6_addr32[i];
835 * The logic of the following condition is a bit complicated.
836 * We expire the prefix when
837 * 1. The address obeys autoconfiguration and it is the
838 * only owner of the associated prefix, or
839 * 2. The address does not obey autoconf and there is no
840 * other owner of the prefix.
842 if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
843 (((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
844 pr->ndpr_refcnt == 1) ||
845 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) &&
846 pr->ndpr_refcnt == 0)))
847 pr->ndpr_expire = 1; /* XXX: just for expiration */
850 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE,
852 in6_purgeaddr(&ia->ia_ifa);
857 if (ifp->if_ioctl == NULL)
859 ifnet_serialize_all(ifp);
860 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
861 ifnet_deserialize_all(ifp);
869 * Update parameters of an IPv6 interface address.
870 * If necessary, a new entry is created and linked into address chains.
871 * This function is separated from in6_control().
872 * XXX: should this be performed under splnet()?
875 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
876 struct in6_ifaddr *ia)
878 int error = 0, hostIsNew = 0, was_tentative, plen = -1;
879 struct in6_ifaddr *oia;
880 struct sockaddr_in6 dst6;
881 struct in6_addrlifetime *lt;
883 /* Validate parameters */
884 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
888 * The destination address for a p2p link must have a family
889 * of AF_UNSPEC or AF_INET6.
891 if ((ifp->if_flags & IFF_POINTOPOINT) &&
892 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
893 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
894 return (EAFNOSUPPORT);
896 * validate ifra_prefixmask. don't check sin6_family, netmask
897 * does not carry fields other than sin6_len.
899 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
902 * Because the IPv6 address architecture is classless, we require
903 * users to specify a (non 0) prefix length (mask) for a new address.
904 * We also require the prefix (when specified) mask is valid, and thus
905 * reject a non-consecutive mask.
907 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
909 if (ifra->ifra_prefixmask.sin6_len != 0) {
910 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
911 (u_char *)&ifra->ifra_prefixmask +
912 ifra->ifra_prefixmask.sin6_len);
918 * In this case, ia must not be NULL. We just use its prefix
921 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
924 * If the destination address on a p2p interface is specified,
925 * and the address is a scoped one, validate/set the scope
928 dst6 = ifra->ifra_dstaddr;
929 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
930 (dst6.sin6_family == AF_INET6)) {
933 if ((error = in6_recoverscope(&dst6,
934 &ifra->ifra_dstaddr.sin6_addr,
937 if (in6_addr2zoneid(ifp, &dst6.sin6_addr, &scopeid))
939 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
940 dst6.sin6_scope_id = scopeid;
941 else if (dst6.sin6_scope_id != scopeid)
942 return (EINVAL); /* scope ID mismatch. */
943 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
946 dst6.sin6_scope_id = 0; /* XXX */
949 * The destination address can be specified only for a p2p or a
950 * loopback interface. If specified, the corresponding prefix length
953 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
954 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
955 /* XXX: noisy message */
956 log(LOG_INFO, "in6_update_ifa: a destination can be "
957 "specified for a p2p or a loopback IF only\n");
962 * The following message seems noisy, but we dare to
963 * add it for diagnosis.
965 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
966 "when dstaddr is specified\n");
970 /* lifetime consistency check */
971 lt = &ifra->ifra_lifetime;
972 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
973 && lt->ia6t_vltime + time_uptime < time_uptime) {
976 if (lt->ia6t_vltime == 0) {
978 * the following log might be noisy, but this is a typical
979 * configuration mistake or a tool's bug.
982 "in6_update_ifa: valid lifetime is 0 for %s\n",
983 ip6_sprintf(&ifra->ifra_addr.sin6_addr));
985 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
986 && lt->ia6t_pltime + time_uptime < time_uptime) {
991 * If this is a new address, allocate a new ifaddr and link it
996 ia = ifa_create(sizeof(*ia));
998 /* Initialize the address and masks */
999 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1000 ia->ia_addr.sin6_family = AF_INET6;
1001 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1002 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1004 * XXX: some functions expect that ifa_dstaddr is not
1005 * NULL for p2p interfaces.
1007 ia->ia_ifa.ifa_dstaddr
1008 = (struct sockaddr *)&ia->ia_dstaddr;
1010 ia->ia_ifa.ifa_dstaddr = NULL;
1012 ia->ia_ifa.ifa_netmask
1013 = (struct sockaddr *)&ia->ia_prefixmask;
1016 if ((oia = in6_ifaddr) != NULL) {
1017 for ( ; oia->ia_next; oia = oia->ia_next)
1023 ifa_iflink(&ia->ia_ifa, ifp, 1);
1026 /* set prefix mask */
1027 if (ifra->ifra_prefixmask.sin6_len) {
1029 * We prohibit changing the prefix length of an existing
1031 * + such an operation should be rare in IPv6, and
1032 * + the operation would confuse prefix management.
1034 if (ia->ia_prefixmask.sin6_len &&
1035 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1036 log(LOG_INFO, "in6_update_ifa: the prefix length of an"
1037 " existing (%s) address should not be changed\n",
1038 ip6_sprintf(&ia->ia_addr.sin6_addr));
1042 ia->ia_prefixmask = ifra->ifra_prefixmask;
1046 * If a new destination address is specified, scrub the old one and
1047 * install the new destination. Note that the interface must be
1048 * p2p or loopback (see the check above.)
1050 if (dst6.sin6_family == AF_INET6 &&
1051 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
1052 &ia->ia_dstaddr.sin6_addr)) {
1055 if ((ia->ia_flags & IFA_ROUTE) &&
1056 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1058 log(LOG_ERR, "in6_update_ifa: failed to remove "
1059 "a route to the old destination: %s\n",
1060 ip6_sprintf(&ia->ia_addr.sin6_addr));
1061 /* proceed anyway... */
1064 ia->ia_flags &= ~IFA_ROUTE;
1065 ia->ia_dstaddr = dst6;
1068 was_tentative = ia->ia6_flags & (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED);
1069 ia->ia6_flags = ifra->ifra_flags;
1070 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
1071 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
1072 if ((hostIsNew || was_tentative) &&
1073 in6if_do_dad(ifp) &&
1074 !(ifra->ifra_flags & IN6_IFF_NODAD))
1075 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1077 ia->ia6_lifetime = ifra->ifra_lifetime;
1079 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1080 ia->ia6_lifetime.ia6t_expire =
1081 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1083 ia->ia6_lifetime.ia6t_expire = 0;
1084 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1085 ia->ia6_lifetime.ia6t_preferred =
1086 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1088 ia->ia6_lifetime.ia6t_preferred = 0;
1090 /* reset the interface and routing table appropriately. */
1091 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1095 * Beyond this point, we should call in6_purgeaddr upon an error,
1096 * not just go to unlink.
1099 if (ifp->if_flags & IFF_MULTICAST) {
1100 struct sockaddr_in6 mltaddr, mltmask;
1101 struct in6_multi *in6m;
1105 * join solicited multicast addr for new host id
1107 struct in6_addr llsol;
1108 bzero(&llsol, sizeof(struct in6_addr));
1109 llsol.s6_addr16[0] = htons(0xff02);
1110 llsol.s6_addr16[1] = htons(ifp->if_index);
1111 llsol.s6_addr32[1] = 0;
1112 llsol.s6_addr32[2] = htonl(1);
1113 llsol.s6_addr32[3] =
1114 ifra->ifra_addr.sin6_addr.s6_addr32[3];
1115 llsol.s6_addr8[12] = 0xff;
1116 in6_addmulti(&llsol, ifp, &error);
1119 "in6_update_ifa: addmulti failed for "
1120 "%s on %s (errno=%d)\n",
1121 ip6_sprintf(&llsol), if_name(ifp),
1123 in6_purgeaddr((struct ifaddr *)ia);
1128 bzero(&mltmask, sizeof(mltmask));
1129 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1130 mltmask.sin6_family = AF_INET6;
1131 mltmask.sin6_addr = in6mask32;
1134 * join link-local all-nodes address
1136 bzero(&mltaddr, sizeof(mltaddr));
1137 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1138 mltaddr.sin6_family = AF_INET6;
1139 mltaddr.sin6_addr = kin6addr_linklocal_allnodes;
1140 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
1142 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1144 rtrequest_global(RTM_ADD,
1145 (struct sockaddr *)&mltaddr,
1146 (struct sockaddr *)&ia->ia_addr,
1147 (struct sockaddr *)&mltmask,
1148 RTF_UP|RTF_CLONING); /* xxx */
1149 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1152 "in6_update_ifa: addmulti failed for "
1153 "%s on %s (errno=%d)\n",
1154 ip6_sprintf(&mltaddr.sin6_addr),
1155 if_name(ifp), error);
1160 * join node information group address
1162 #define hostnamelen strlen(hostname)
1163 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
1165 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1166 if (in6m == NULL && ia != NULL) {
1167 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1169 log(LOG_WARNING, "in6_update_ifa: "
1170 "addmulti failed for "
1171 "%s on %s (errno=%d)\n",
1172 ip6_sprintf(&mltaddr.sin6_addr),
1173 if_name(ifp), error);
1180 * join node-local all-nodes address, on loopback.
1181 * XXX: since "node-local" is obsoleted by interface-local,
1182 * we have to join the group on every interface with
1183 * some interface-boundary restriction.
1185 if (ifp->if_flags & IFF_LOOPBACK) {
1186 struct in6_ifaddr *ia_loop;
1188 struct in6_addr loop6 = kin6addr_loopback;
1189 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
1191 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes;
1193 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1194 if (in6m == NULL && ia_loop != NULL) {
1195 rtrequest_global(RTM_ADD,
1196 (struct sockaddr *)&mltaddr,
1197 (struct sockaddr *)&ia_loop->ia_addr,
1198 (struct sockaddr *)&mltmask,
1200 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1202 log(LOG_WARNING, "in6_update_ifa: "
1203 "addmulti failed for %s on %s "
1205 ip6_sprintf(&mltaddr.sin6_addr),
1206 if_name(ifp), error);
1213 * Perform DAD, if needed.
1214 * XXX It may be of use, if we can administratively
1217 if (in6if_do_dad(ifp) &&
1218 !(ifra->ifra_flags & IN6_IFF_NODAD) &&
1219 ia->ia6_flags & IN6_IFF_TENTATIVE)
1220 nd6_dad_start((struct ifaddr *)ia, NULL);
1226 * XXX: if a change of an existing address failed, keep the entry
1230 in6_unlink_ifa(ia, ifp);
1235 in6_purgeaddr(struct ifaddr *ifa)
1237 struct ifnet *ifp = ifa->ifa_ifp;
1238 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1240 /* stop DAD processing */
1244 * delete route to the destination of the address being purged.
1245 * The interface must be p2p or loopback in this case.
1247 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) {
1250 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1252 log(LOG_ERR, "in6_purgeaddr: failed to remove "
1253 "a route to the p2p destination: %s on %s, "
1255 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
1257 /* proceed anyway... */
1260 ia->ia_flags &= ~IFA_ROUTE;
1263 /* Remove ownaddr's loopback rtentry, if it exists. */
1264 in6_ifremloop(&(ia->ia_ifa));
1266 if (ifp->if_flags & IFF_MULTICAST) {
1268 * delete solicited multicast addr for deleting host id
1270 struct in6_multi *in6m;
1271 struct in6_addr llsol;
1272 bzero(&llsol, sizeof(struct in6_addr));
1273 llsol.s6_addr16[0] = htons(0xff02);
1274 llsol.s6_addr16[1] = htons(ifp->if_index);
1275 llsol.s6_addr32[1] = 0;
1276 llsol.s6_addr32[2] = htonl(1);
1277 llsol.s6_addr32[3] =
1278 ia->ia_addr.sin6_addr.s6_addr32[3];
1279 llsol.s6_addr8[12] = 0xff;
1281 in6m = IN6_LOOKUP_MULTI(&llsol, ifp);
1286 in6_unlink_ifa(ia, ifp);
1290 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1292 struct in6_ifaddr *oia;
1296 ifa_ifunlink(&ia->ia_ifa, ifp);
1299 if (oia == (ia = in6_ifaddr))
1300 in6_ifaddr = ia->ia_next;
1302 while (ia->ia_next && (ia->ia_next != oia))
1305 ia->ia_next = oia->ia_next;
1308 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1313 * When an autoconfigured address is being removed, release the
1314 * reference to the base prefix. Also, since the release might
1315 * affect the status of other (detached) addresses, call
1316 * pfxlist_onlink_check().
1318 if (oia->ia6_flags & IN6_IFF_AUTOCONF) {
1319 if (oia->ia6_ndpr == NULL) {
1320 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
1321 "%p has no prefix\n", oia);
1323 oia->ia6_ndpr->ndpr_refcnt--;
1324 oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
1325 oia->ia6_ndpr = NULL;
1328 pfxlist_onlink_check();
1332 * release another refcnt for the link from in6_ifaddr.
1333 * Note that we should decrement the refcnt at least once for all *BSD.
1335 ifa_destroy(&oia->ia_ifa);
1341 in6_purgeif(struct ifnet *ifp)
1343 struct ifaddr_container *ifac, *next;
1345 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
1347 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1349 in6_purgeaddr(ifac->ifa);
1357 * SIOCGLIFADDR: get first address. (?)
1358 * SIOCGLIFADDR with IFLR_PREFIX:
1359 * get first address that matches the specified prefix.
1360 * SIOCALIFADDR: add the specified address.
1361 * SIOCALIFADDR with IFLR_PREFIX:
1362 * add the specified prefix, filling hostid part from
1363 * the first link-local address. prefixlen must be <= 64.
1364 * SIOCDLIFADDR: delete the specified address.
1365 * SIOCDLIFADDR with IFLR_PREFIX:
1366 * delete the first address that matches the specified prefix.
1368 * EINVAL on invalid parameters
1369 * EADDRNOTAVAIL on prefix match failed/specified address not found
1370 * other values may be returned from in6_ioctl()
1372 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1373 * this is to accomodate address naming scheme other than RFC2374,
1375 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1376 * address encoding scheme. (see figure on page 8)
1379 in6_lifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp,
1382 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1383 struct sockaddr *sa;
1386 if (!data || !ifp) {
1387 panic("invalid argument to in6_lifaddr_ioctl");
1393 /* address must be specified on GET with IFLR_PREFIX */
1394 if (!(iflr->flags & IFLR_PREFIX))
1399 /* address must be specified on ADD and DELETE */
1400 sa = (struct sockaddr *)&iflr->addr;
1401 if (sa->sa_family != AF_INET6)
1403 if (sa->sa_len != sizeof(struct sockaddr_in6))
1405 /* XXX need improvement */
1406 sa = (struct sockaddr *)&iflr->dstaddr;
1407 if (sa->sa_family && sa->sa_family != AF_INET6)
1409 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1412 default: /* shouldn't happen */
1414 panic("invalid cmd to in6_lifaddr_ioctl");
1420 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1426 struct in6_aliasreq ifra;
1427 struct in6_addr *hostid = NULL;
1430 if (iflr->flags & IFLR_PREFIX) {
1432 struct sockaddr_in6 *sin6;
1435 * hostid is to fill in the hostid part of the
1436 * address. hostid points to the first link-local
1437 * address attached to the interface.
1439 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1441 return EADDRNOTAVAIL;
1442 hostid = IFA_IN6(ifa);
1444 /* prefixlen must be <= 64. */
1445 if (64 < iflr->prefixlen)
1447 prefixlen = iflr->prefixlen;
1449 /* hostid part must be zero. */
1450 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1451 if (sin6->sin6_addr.s6_addr32[2] != 0
1452 || sin6->sin6_addr.s6_addr32[3] != 0) {
1456 prefixlen = iflr->prefixlen;
1458 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1459 bzero(&ifra, sizeof(ifra));
1460 bcopy(iflr->iflr_name, ifra.ifra_name,
1461 sizeof(ifra.ifra_name));
1463 bcopy(&iflr->addr, &ifra.ifra_addr,
1464 ((struct sockaddr *)&iflr->addr)->sa_len);
1466 /* fill in hostid part */
1467 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1468 hostid->s6_addr32[2];
1469 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1470 hostid->s6_addr32[3];
1473 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
1474 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1475 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1477 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1478 hostid->s6_addr32[2];
1479 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1480 hostid->s6_addr32[3];
1484 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1485 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1487 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1488 return in6_control_internal(SIOCAIFADDR_IN6, (caddr_t)&ifra,
1494 struct ifaddr_container *ifac;
1495 struct in6_ifaddr *ia;
1496 struct in6_addr mask, candidate, match;
1497 struct sockaddr_in6 *sin6;
1500 bzero(&mask, sizeof(mask));
1501 if (iflr->flags & IFLR_PREFIX) {
1502 /* lookup a prefix rather than address. */
1503 in6_prefixlen2mask(&mask, iflr->prefixlen);
1505 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1506 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1507 match.s6_addr32[0] &= mask.s6_addr32[0];
1508 match.s6_addr32[1] &= mask.s6_addr32[1];
1509 match.s6_addr32[2] &= mask.s6_addr32[2];
1510 match.s6_addr32[3] &= mask.s6_addr32[3];
1512 /* if you set extra bits, that's wrong */
1513 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1518 if (cmd == SIOCGLIFADDR) {
1519 /* on getting an address, take the 1st match */
1522 /* on deleting an address, do exact match */
1523 in6_prefixlen2mask(&mask, 128);
1524 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1525 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1531 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1532 struct ifaddr *ifa = ifac->ifa;
1534 if (ifa->ifa_addr->sa_family != AF_INET6)
1539 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1541 * XXX: this is adhoc, but is necessary to allow
1542 * a user to specify fe80::/64 (not /10) for a
1543 * link-local address.
1545 if (IN6_IS_ADDR_LINKLOCAL(&candidate))
1546 candidate.s6_addr16[1] = 0;
1547 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1548 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1549 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1550 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1551 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1555 return EADDRNOTAVAIL;
1556 ia = ifa2ia6(ifac->ifa);
1558 if (cmd == SIOCGLIFADDR) {
1559 struct sockaddr_in6 *s6;
1561 /* fill in the if_laddrreq structure */
1562 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1563 s6 = (struct sockaddr_in6 *)&iflr->addr;
1564 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1565 s6->sin6_addr.s6_addr16[1] = 0;
1566 if (in6_addr2zoneid(ifp, &s6->sin6_addr,
1567 &s6->sin6_scope_id))
1568 return (EINVAL);/* XXX */
1570 if (ifp->if_flags & IFF_POINTOPOINT) {
1571 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1572 ia->ia_dstaddr.sin6_len);
1573 s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
1574 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1575 s6->sin6_addr.s6_addr16[1] = 0;
1576 if (in6_addr2zoneid(ifp,
1577 &s6->sin6_addr, &s6->sin6_scope_id))
1578 return (EINVAL); /* EINVAL */
1581 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1584 in6_mask2len(&ia->ia_prefixmask.sin6_addr,
1587 iflr->flags = ia->ia6_flags; /* XXX */
1591 struct in6_aliasreq ifra;
1593 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1594 bzero(&ifra, sizeof(ifra));
1595 bcopy(iflr->iflr_name, ifra.ifra_name,
1596 sizeof(ifra.ifra_name));
1598 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1599 ia->ia_addr.sin6_len);
1600 if (ifp->if_flags & IFF_POINTOPOINT)
1601 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1602 ia->ia_dstaddr.sin6_len);
1604 bzero(&ifra.ifra_dstaddr,
1605 sizeof(ifra.ifra_dstaddr));
1606 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1607 ia->ia_prefixmask.sin6_len);
1609 ifra.ifra_flags = ia->ia6_flags;
1610 return in6_control_internal(SIOCDIFADDR_IN6,
1611 (caddr_t)&ifra, ifp, td);
1616 return EOPNOTSUPP; /* just for safety */
1620 * Initialize an interface's intetnet6 address
1621 * and routing table entry.
1624 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6,
1627 int error = 0, plen;
1629 ia->ia_addr = *sin6;
1631 if (ifp->if_ioctl != NULL) {
1632 ifnet_serialize_all(ifp);
1633 error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia, NULL);
1634 ifnet_deserialize_all(ifp);
1639 ia->ia_ifa.ifa_metric = ifp->if_metric;
1641 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1645 * If the destination address is specified for a point-to-point
1646 * interface, install a route to the destination as an interface
1649 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1650 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
1651 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
1652 RTF_UP | RTF_HOST)) != 0)
1654 ia->ia_flags |= IFA_ROUTE;
1658 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1660 ia->ia_ifa.ifa_flags |= RTF_CLONING;
1663 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1665 /* set the rtrequest function to create llinfo */
1666 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
1667 in6_ifaddloop(&(ia->ia_ifa));
1673 struct in6_multi_mship *
1674 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp)
1676 struct in6_multi_mship *imm;
1678 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT);
1683 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp);
1684 if (!imm->i6mm_maddr) {
1685 /* *errorp is alrady set */
1686 kfree(imm, M_IPMADDR);
1693 in6_leavegroup(struct in6_multi_mship *imm)
1696 if (imm->i6mm_maddr)
1697 in6_delmulti(imm->i6mm_maddr);
1698 kfree(imm, M_IPMADDR);
1703 * Add an address to the list of IP6 multicast addresses for a
1707 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp)
1709 struct in6_multi *in6m;
1710 struct sockaddr_in6 sin6;
1711 struct ifmultiaddr *ifma;
1718 * Call generic routine to add membership or increment
1719 * refcount. It wants addresses in the form of a sockaddr,
1720 * so we build one here (being careful to zero the unused bytes).
1722 bzero(&sin6, sizeof sin6);
1723 sin6.sin6_family = AF_INET6;
1724 sin6.sin6_len = sizeof sin6;
1725 sin6.sin6_addr = *maddr6;
1726 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
1733 * If ifma->ifma_protospec is null, then if_addmulti() created
1734 * a new record. Otherwise, we are done.
1736 if (ifma->ifma_protospec != NULL) {
1738 return ifma->ifma_protospec;
1741 in6m = kmalloc(sizeof(*in6m), M_IPMADDR, M_INTWAIT | M_ZERO);
1742 in6m->in6m_addr = *maddr6;
1743 in6m->in6m_ifp = ifp;
1744 in6m->in6m_ifma = ifma;
1745 ifma->ifma_protospec = in6m;
1746 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
1749 * Let MLD6 know that we have joined a new IP6 multicast
1752 mld6_start_listening(in6m);
1758 * Delete a multicast address record.
1761 in6_delmulti(struct in6_multi *in6m)
1763 struct ifmultiaddr *ifma = in6m->in6m_ifma;
1767 if (ifma->ifma_refcount == 1) {
1769 * No remaining claims to this record; let MLD6 know
1770 * that we are leaving the multicast group.
1772 mld6_stop_listening(in6m);
1773 ifma->ifma_protospec = NULL;
1774 LIST_REMOVE(in6m, in6m_entry);
1775 kfree(in6m, M_IPMADDR);
1777 /* XXX - should be separate API for when we have an ifma? */
1778 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
1783 * Find an IPv6 interface link-local address specific to an interface.
1786 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1788 const struct ifaddr_container *ifac;
1790 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1791 struct ifaddr *ifa = ifac->ifa;
1793 if (ifa->ifa_addr == NULL)
1794 continue; /* just for safety */
1795 if (ifa->ifa_addr->sa_family != AF_INET6)
1797 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1798 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1801 return (struct in6_ifaddr *)ifa;
1809 * find the internet address corresponding to a given interface and address.
1812 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1814 const struct ifaddr_container *ifac;
1816 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1817 struct ifaddr *ifa = ifac->ifa;
1819 if (ifa->ifa_addr == NULL)
1820 continue; /* just for safety */
1821 if (ifa->ifa_addr->sa_family != AF_INET6)
1823 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
1824 return (struct in6_ifaddr *)ifa;
1830 * Find a link-local scoped address on ifp and return it if any.
1833 in6ifa_llaonifp(struct ifnet *ifp)
1835 const struct ifaddr_container *ifac;
1837 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1838 const struct sockaddr_in6 *sin6;
1839 struct ifaddr *ifa = ifac->ifa;
1841 if (ifa->ifa_addr->sa_family != AF_INET6)
1843 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
1844 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1845 /* XXX why are mcast addresses ifp address list? */
1846 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1847 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1848 return (struct in6_ifaddr *)ifa;
1854 * find the internet address on a given interface corresponding to a neighbor's
1858 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr)
1861 struct in6_ifaddr *ia;
1862 struct ifaddr_container *ifac;
1864 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1867 if (ifa->ifa_addr == NULL)
1868 continue; /* just for safety */
1869 if (ifa->ifa_addr->sa_family != AF_INET6)
1871 ia = (struct in6_ifaddr *)ifa;
1872 if (IN6_ARE_MASKED_ADDR_EQUAL(addr,
1873 &ia->ia_addr.sin6_addr,
1874 &ia->ia_prefixmask.sin6_addr))
1882 * Convert IP6 address to printable (loggable) representation.
1884 static char digits[] = "0123456789abcdef";
1885 static int ip6round = 0;
1887 ip6_sprintf(const struct in6_addr *addr)
1889 static char ip6buf[8][48];
1892 const u_short *a = (const u_short *)addr;
1896 ip6round = (ip6round + 1) & 7;
1897 cp = ip6buf[ip6round];
1899 for (i = 0; i < 8; i++) {
1910 if (dcolon == 0 && *(a + 1) == 0) {
1922 d = (const u_char *)a;
1923 *cp++ = digits[*d >> 4];
1924 *cp++ = digits[*d++ & 0xf];
1925 *cp++ = digits[*d >> 4];
1926 *cp++ = digits[*d & 0xf];
1931 return (ip6buf[ip6round]);
1935 in6_localaddr(struct in6_addr *in6)
1937 struct in6_ifaddr *ia;
1939 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1942 for (ia = in6_ifaddr; ia; ia = ia->ia_next)
1943 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1944 &ia->ia_prefixmask.sin6_addr))
1951 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1953 struct in6_ifaddr *ia;
1955 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
1956 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
1958 (ia->ia6_flags & IN6_IFF_DEPRECATED))
1959 return (1); /* true */
1961 /* XXX: do we still have to go thru the rest of the list? */
1964 return (0); /* false */
1968 * return length of part which dst and src are equal
1972 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1975 u_char *s = (u_char *)src, *d = (u_char *)dst;
1976 u_char *lim = s + 16, r;
1979 if ((r = (*d++ ^ *s++)) != 0) {
1990 /* XXX: to be scope conscious */
1992 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1994 int bytelen, bitlen;
1997 if (0 > len || len > 128) {
1998 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2006 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2008 if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
2009 p2->s6_addr[bytelen] >> (8 - bitlen))
2016 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2018 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2019 int bytelen, bitlen, i;
2022 if (0 > len || len > 128) {
2023 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2028 bzero(maskp, sizeof(*maskp));
2031 for (i = 0; i < bytelen; i++)
2032 maskp->s6_addr[i] = 0xff;
2034 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2038 * return the best address out of the same scope
2041 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, struct ucred *cred)
2043 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
2045 struct in6_ifaddr *ifa_best = NULL;
2046 u_int32_t dstzone, odstzone;
2048 const struct ifnet_array *arr;
2051 if(cred && cred->cr_prison)
2057 if (in6_addr2zoneid(oifp, dst, &odstzone))
2061 * We search for all addresses on all interfaces from the beginning.
2062 * Comparing an interface with the outgoing interface will be done
2063 * only at the final stage of tiebreaking.
2065 arr = ifnet_array_get();
2066 for (i = 0; i < arr->ifnet_count; ++i) {
2067 struct ifnet *ifp = arr->ifnet_arr[i];
2068 struct ifaddr_container *ifac;
2071 * We can never take an address that breaks the scope zone
2072 * of the destination.
2074 if (ifp->if_afdata[AF_INET6] == NULL)
2076 if (in6_addr2zoneid(ifp, dst, &dstzone) || dstzone != odstzone)
2079 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2080 int tlen = -1, dscopecmp, bscopecmp, matchcmp;
2081 struct ifaddr *ifa = ifac->ifa;
2083 if (ifa->ifa_addr->sa_family != AF_INET6)
2086 src_scope = in6_addrscope(IFA_IN6(ifa));
2089 * Don't use an address before completing DAD
2090 * nor a duplicated address.
2092 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2096 /* XXX: is there any case to allow anycasts? */
2097 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2101 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2105 /* Skip adresses not valid for current jail */
2107 !(jailed_ip(cred->cr_prison, (struct sockaddr *)(ifa->ifa_addr)) != 0))
2111 * If this is the first address we find,
2114 if (ifa_best == NULL)
2118 * ifa_best is never NULL beyond this line except
2119 * within the block labeled "replace".
2123 * If ifa_best has a smaller scope than dst and
2124 * the current address has a larger one than
2125 * (or equal to) dst, always replace ifa_best.
2126 * Also, if the current address has a smaller scope
2127 * than dst, ignore it unless ifa_best also has a
2129 * Consequently, after the two if-clause below,
2130 * the followings must be satisfied:
2131 * (scope(src) < scope(dst) &&
2132 * scope(best) < scope(dst))
2134 * (scope(best) >= scope(dst) &&
2135 * scope(src) >= scope(dst))
2137 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
2138 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
2139 goto replace; /* (A) */
2140 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
2141 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
2145 * A deprecated address SHOULD NOT be used in new
2146 * communications if an alternate (non-deprecated)
2147 * address is available and has sufficient scope.
2148 * RFC 2462, Section 5.5.4.
2150 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2151 IN6_IFF_DEPRECATED) {
2153 * Ignore any deprecated addresses if
2154 * specified by configuration.
2156 if (!ip6_use_deprecated)
2160 * If we have already found a non-deprecated
2161 * candidate, just ignore deprecated addresses.
2163 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED))
2168 * A non-deprecated address is always preferred
2169 * to a deprecated one regardless of scopes and
2170 * address matching (Note invariants ensured by the
2171 * conditions (A) and (B) above.)
2173 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
2174 !(((struct in6_ifaddr *)ifa)->ia6_flags &
2175 IN6_IFF_DEPRECATED))
2179 * When we use temporary addresses described in
2180 * RFC 3041, we prefer temporary addresses to
2181 * public autoconf addresses. Again, note the
2182 * invariants from (A) and (B). Also note that we
2183 * don't have any preference between static addresses
2184 * and autoconf addresses (despite of whether or not
2185 * the latter is temporary or public.)
2187 if (ip6_use_tempaddr) {
2188 struct in6_ifaddr *ifat;
2190 ifat = (struct in6_ifaddr *)ifa;
2191 if ((ifa_best->ia6_flags &
2192 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2193 == IN6_IFF_AUTOCONF &&
2195 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2196 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
2199 if ((ifa_best->ia6_flags &
2200 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2201 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
2203 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2204 == IN6_IFF_AUTOCONF) {
2210 * At this point, we have two cases:
2211 * 1. we are looking at a non-deprecated address,
2212 * and ifa_best is also non-deprecated.
2213 * 2. we are looking at a deprecated address,
2214 * and ifa_best is also deprecated.
2215 * Also, we do not have to consider a case where
2216 * the scope of if_best is larger(smaller) than dst and
2217 * the scope of the current address is smaller(larger)
2218 * than dst. Such a case has already been covered.
2219 * Tiebreaking is done according to the following
2221 * - the scope comparison between the address and
2223 * - the scope comparison between the address and
2224 * ifa_best (bscopecmp)
2225 * - if the address match dst longer than ifa_best
2227 * - if the address is on the outgoing I/F (outI/F)
2229 * Roughly speaking, the selection policy is
2230 * - the most important item is scope. The same scope
2231 * is best. Then search for a larger scope.
2232 * Smaller scopes are the last resort.
2233 * - A deprecated address is chosen only when we have
2234 * no address that has an enough scope, but is
2235 * prefered to any addresses of smaller scopes
2236 * (this must be already done above.)
2237 * - addresses on the outgoing I/F are preferred to
2238 * ones on other interfaces if none of above
2239 * tiebreaks. In the table below, the column "bI"
2240 * means if the best_ifa is on the outgoing
2241 * interface, and the column "sI" means if the ifa
2242 * is on the outgoing interface.
2243 * - If there is no other reasons to choose one,
2244 * longest address match against dst is considered.
2246 * The precise decision table is as follows:
2247 * dscopecmp bscopecmp match bI oI | replace?
2248 * N/A equal N/A Y N | No (1)
2249 * N/A equal N/A N Y | Yes (2)
2250 * N/A equal larger N/A | Yes (3)
2251 * N/A equal !larger N/A | No (4)
2252 * larger larger N/A N/A | No (5)
2253 * larger smaller N/A N/A | Yes (6)
2254 * smaller larger N/A N/A | Yes (7)
2255 * smaller smaller N/A N/A | No (8)
2256 * equal smaller N/A N/A | Yes (9)
2257 * equal larger (already done at A above)
2259 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
2260 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
2262 if (bscopecmp == 0) {
2263 struct ifnet *bifp = ifa_best->ia_ifp;
2265 if (bifp == oifp && ifp != oifp) /* (1) */
2267 if (bifp != oifp && ifp == oifp) /* (2) */
2271 * Both bifp and ifp are on the outgoing
2272 * interface, or both two are on a different
2273 * interface from the outgoing I/F.
2274 * now we need address matching against dst
2277 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2278 matchcmp = tlen - blen;
2279 if (matchcmp > 0) /* (3) */
2283 if (dscopecmp > 0) {
2284 if (bscopecmp > 0) /* (5) */
2286 goto replace; /* (6) */
2288 if (dscopecmp < 0) {
2289 if (bscopecmp > 0) /* (7) */
2294 /* now dscopecmp must be 0 */
2296 goto replace; /* (9) */
2299 ifa_best = (struct in6_ifaddr *)ifa;
2300 blen = tlen >= 0 ? tlen :
2301 in6_matchlen(IFA_IN6(ifa), dst);
2302 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
2306 /* count statistics for future improvements */
2307 if (ifa_best == NULL)
2308 ip6stat.ip6s_sources_none++;
2310 if (oifp == ifa_best->ia_ifp)
2311 ip6stat.ip6s_sources_sameif[best_scope]++;
2313 ip6stat.ip6s_sources_otherif[best_scope]++;
2315 if (best_scope == dst_scope)
2316 ip6stat.ip6s_sources_samescope[best_scope]++;
2318 ip6stat.ip6s_sources_otherscope[best_scope]++;
2320 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
2321 ip6stat.ip6s_sources_deprecated[best_scope]++;
2328 * return the best address out of the same scope. if no address was
2329 * found, return the first valid address from designated IF.
2332 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2334 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2335 struct ifaddr_container *ifac;
2336 struct in6_ifaddr *besta = NULL;
2337 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2339 dep[0] = dep[1] = NULL;
2342 * We first look for addresses in the same scope.
2343 * If there is one, return it.
2344 * If two or more, return one which matches the dst longest.
2345 * If none, return one of global addresses assigned other ifs.
2347 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2348 struct ifaddr *ifa = ifac->ifa;
2350 if (ifa->ifa_addr->sa_family != AF_INET6)
2352 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2353 continue; /* XXX: is there any case to allow anycast? */
2354 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2355 continue; /* don't use this interface */
2356 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2358 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2359 if (ip6_use_deprecated)
2360 dep[0] = (struct in6_ifaddr *)ifa;
2364 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2366 * call in6_matchlen() as few as possible
2370 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2371 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2374 besta = (struct in6_ifaddr *)ifa;
2377 besta = (struct in6_ifaddr *)ifa;
2383 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2384 struct ifaddr *ifa = ifac->ifa;
2386 if (ifa->ifa_addr->sa_family != AF_INET6)
2388 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2389 continue; /* XXX: is there any case to allow anycast? */
2390 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2391 continue; /* don't use this interface */
2392 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2394 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2395 if (ip6_use_deprecated)
2396 dep[1] = (struct in6_ifaddr *)ifa;
2400 return (struct in6_ifaddr *)ifa;
2403 /* use the last-resort values, that are, deprecated addresses */
2413 * perform DAD when interface becomes IFF_UP.
2416 in6_if_up_dispatch(netmsg_t nmsg)
2418 struct ifnet *ifp = nmsg->lmsg.u.ms_resultp;
2419 struct ifaddr_container *ifac;
2420 struct in6_ifaddr *ia;
2421 int dad_delay; /* delay ticks before DAD output */
2426 * special cases, like 6to4, are handled in in6_ifattach
2428 in6_ifattach(ifp, NULL);
2431 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2432 struct ifaddr *ifa = ifac->ifa;
2434 if (ifa->ifa_addr->sa_family != AF_INET6)
2436 ia = (struct in6_ifaddr *)ifa;
2437 if (ia->ia6_flags & IN6_IFF_TENTATIVE)
2438 nd6_dad_start(ifa, &dad_delay);
2441 netisr_replymsg(&nmsg->base, 0);
2445 in6_if_up(struct ifnet *ifp)
2447 struct netmsg_base nmsg;
2449 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0, in6_if_up_dispatch);
2450 nmsg.lmsg.u.ms_resultp = ifp;
2451 netisr_domsg(&nmsg, 0);
2455 in6if_do_dad(struct ifnet *ifp)
2457 if (ifp->if_flags & IFF_LOOPBACK)
2460 switch (ifp->if_type) {
2467 * Our DAD routine requires the interface up and running.
2468 * However, some interfaces can be up before the RUNNING
2469 * status. Additionaly, users may try to assign addresses
2470 * before the interface becomes up (or running).
2471 * We simply skip DAD in such a case as a work around.
2472 * XXX: we should rather mark "tentative" on such addresses,
2473 * and do DAD after the interface becomes ready.
2475 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2476 (IFF_UP|IFF_RUNNING))
2484 * Calculate max IPv6 MTU through all the interfaces and store it
2490 unsigned long maxmtu = 0;
2491 const struct ifnet_array *arr;
2496 arr = ifnet_array_get();
2497 for (i = 0; i < arr->ifnet_count; ++i) {
2498 struct ifnet *ifp = arr->ifnet_arr[i];
2500 /* this function can be called during ifnet initialization */
2501 if (ifp->if_afdata[AF_INET6] == NULL)
2503 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2504 IN6_LINKMTU(ifp) > maxmtu)
2505 maxmtu = IN6_LINKMTU(ifp);
2507 if (maxmtu) /* update only when maxmtu is positive */
2508 in6_maxmtu = maxmtu;
2512 in6_domifattach(struct ifnet *ifp)
2514 struct in6_ifextra *ext;
2516 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2517 bzero(ext, sizeof(*ext));
2519 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat),
2520 M_IFADDR, M_WAITOK);
2521 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2524 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat),
2525 M_IFADDR, M_WAITOK);
2526 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2528 ext->nd_ifinfo = nd6_ifattach(ifp);
2529 ext->scope6_id = scope6_ifattach(ifp);
2534 in6_domifdetach(struct ifnet *ifp, void *aux)
2536 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2537 scope6_ifdetach(ext->scope6_id);
2538 nd6_ifdetach(ext->nd_ifinfo);
2539 kfree(ext->in6_ifstat, M_IFADDR);
2540 kfree(ext->icmp6_ifstat, M_IFADDR);
2541 kfree(ext, M_IFADDR);