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
11 * 1. Redistributions of source code must retain the above copyright
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
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21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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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
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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
40 * 1. Redistributions of source code must retain the above copyright
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
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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 */
144 int (*faithprefix_p)(struct in6_addr *);
147 * Subroutine for in6_ifaddloop() and in6_ifremloop().
148 * This routine does actual work.
151 in6_ifloop_request(int cmd, struct ifaddr *ifa)
153 struct sockaddr_in6 all1_sa;
154 struct rt_addrinfo rtinfo;
157 bzero(&all1_sa, sizeof(all1_sa));
158 all1_sa.sin6_family = AF_INET6;
159 all1_sa.sin6_len = sizeof(struct sockaddr_in6);
160 all1_sa.sin6_addr = in6mask128;
163 * We specify the address itself as the gateway, and set the
164 * RTF_LLINFO flag, so that the corresponding host route would have
165 * the flag, and thus applications that assume traditional behavior
166 * would be happy. Note that we assume the caller of the function
167 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
168 * which changes the outgoing interface to the loopback interface.
170 bzero(&rtinfo, sizeof(struct rt_addrinfo));
171 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr;
172 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
173 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa;
174 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO;
176 error = rtrequest1_global(cmd, &rtinfo,
177 in6_ifloop_request_callback, ifa, RTREQ_PRIO_NORM);
179 log(LOG_ERR, "in6_ifloop_request: "
180 "%s operation failed for %s (errno=%d)\n",
181 cmd == RTM_ADD ? "ADD" : "DELETE",
182 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
188 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
189 struct rtentry *rt, void *arg)
191 struct ifaddr *ifa = arg;
197 * Make sure rt_ifa be equal to IFA, the second argument of the
199 * We need this because when we refer to rt_ifa->ia6_flags in
200 * ip6_input, we assume that the rt_ifa points to the address instead
201 * of the loopback address.
203 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) {
212 * Report the addition/removal of the address to the routing socket.
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 rt_newaddrmsg(cmd, ifa, error, rt);
220 if (cmd == RTM_DELETE) {
221 if (rt->rt_refcnt == 0) {
228 /* no way to return any new error */
233 * Add ownaddr as loopback rtentry. We previously add the route only if
234 * necessary (ex. on a p2p link). However, since we now manage addresses
235 * separately from prefixes, we should always add the route. We can't
236 * rely on the cloning mechanism from the corresponding interface route
240 in6_ifaddloop(struct ifaddr *ifa)
244 /* If there is no loopback entry, allocate one. */
245 rt = rtpurelookup(ifa->ifa_addr);
246 if (rt == NULL || !(rt->rt_flags & RTF_HOST) ||
247 !(rt->rt_ifp->if_flags & IFF_LOOPBACK))
248 in6_ifloop_request(RTM_ADD, ifa);
254 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
258 in6_ifremloop(struct ifaddr *ifa)
260 struct in6_ifaddr *ia;
265 * Some of BSD variants do not remove cloned routes
266 * from an interface direct route, when removing the direct route
267 * (see comments in net/net_osdep.h). Even for variants that do remove
268 * cloned routes, they could fail to remove the cloned routes when
269 * we handle multple addresses that share a common prefix.
270 * So, we should remove the route corresponding to the deleted address
271 * regardless of the result of in6_is_ifloop_auto().
275 * Delete the entry only if exact one ifa exists. More than one ifa
276 * can exist if we assign a same single address to multiple
277 * (probably p2p) interfaces.
278 * XXX: we should avoid such a configuration in IPv6...
280 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
281 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
290 * Before deleting, check if a corresponding loopbacked host
291 * route surely exists. With this check, we can avoid to
292 * delete an interface direct route whose destination is same
293 * as the address being removed. This can happen when remofing
294 * a subnet-router anycast address on an interface attahced
295 * to a shared medium.
297 rt = rtpurelookup(ifa->ifa_addr);
298 if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
299 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
301 in6_ifloop_request(RTM_DELETE, ifa);
307 in6_ifindex2scopeid(int idx)
310 struct sockaddr_in6 *sin6;
311 struct ifaddr_container *ifac;
313 if (idx < 0 || if_index < idx)
315 ifp = ifindex2ifnet[idx];
317 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link)
319 struct ifaddr *ifa = ifac->ifa;
321 if (ifa->ifa_addr->sa_family != AF_INET6)
323 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
324 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))
325 return sin6->sin6_scope_id & 0xffff;
332 in6_mask2len(const struct in6_addr *mask, const u_char *lim0)
335 const u_char *lim = lim0, *p;
338 lim0 - (const u_char *)mask > sizeof(*mask)) {
339 /* Ignore the scope_id part */
340 lim = (const u_char *)mask + sizeof(*mask);
342 for (p = (const u_char *)mask; p < lim; x++, p++) {
348 for (y = 0; y < 8; y++) {
349 if ((*p & (0x80 >> y)) == 0)
355 * When the limit pointer is given, do a stricter check on the
359 if (y != 0 && (*p & (0x00ff >> y)) != 0)
361 for (p = p + 1; p < lim; p++)
370 in6_len2mask(struct in6_addr *mask, int len)
374 bzero(mask, sizeof(*mask));
375 for (i = 0; i < len / 8; i++)
376 mask->s6_addr8[i] = 0xff;
378 mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff;
381 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
382 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
385 in6_control_dispatch(netmsg_t msg)
389 error = in6_control(msg->control.nm_cmd,
390 msg->control.nm_data,
393 lwkt_replymsg(&msg->control.base.lmsg, error);
397 in6_control(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td)
399 struct netmsg_pru_control msg;
402 case SIOCSIFPREFIX_IN6:
403 case SIOCDIFPREFIX_IN6:
404 case SIOCAIFPREFIX_IN6:
405 case SIOCCIFPREFIX_IN6:
406 case SIOCSGIFPREFIX_IN6:
407 case SIOCGIFPREFIX_IN6:
408 log(LOG_NOTICE, "prefix ioctls are now invalidated. "
409 "please use ifconfig.\n");
412 case SIOCSIFADDR_IN6:
413 case SIOCSIFDSTADDR_IN6:
414 case SIOCSIFNETMASK_IN6:
416 * Since IPv6 allows a node to assign multiple addresses
417 * on a single interface, SIOCSIFxxx ioctls are not suitable
418 * and should be unused.
420 /* We decided to obsolete this command (20000704) */
428 * Do not pass those ioctl to driver handler since they are not
429 * properly setup. Instead just error out.
434 case SIOCGETSGCNT_IN6:
435 case SIOCGETMIFCNT_IN6:
437 case SIOCAADDRCTL_POLICY:
438 case SIOCDADDRCTL_POLICY:
440 case SIOCSNDFLUSH_IN6:
441 case SIOCSPFXFLUSH_IN6:
442 case SIOCSRTRFLUSH_IN6:
443 case SIOCSDEFIFACE_IN6:
444 case SIOCSIFINFO_FLAGS:
445 case OSIOCGIFINFO_IN6:
446 case SIOCGIFINFO_IN6:
449 case SIOCGNBRINFO_IN6:
450 case SIOCGDEFIFACE_IN6:
458 case SIOCSIFALIFETIME_IN6:
459 case SIOCAIFADDR_IN6:
460 case SIOCDIFADDR_IN6:
462 * Dispatch these SIOCs to netisr0.
464 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
465 in6_control_internal_dispatch);
470 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
471 return msg.base.lmsg.ms_error;
474 return in6_control_internal(cmd, data, ifp, td);
479 in6_control_internal_dispatch(netmsg_t msg)
483 error = in6_control_internal(msg->control.nm_cmd, msg->control.nm_data,
484 msg->control.nm_ifp, msg->control.nm_td);
485 lwkt_replymsg(&msg->lmsg, error);
489 in6_control_internal(u_long cmd, caddr_t data, struct ifnet *ifp,
492 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
493 struct in6_ifaddr *ia = NULL;
494 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
495 struct in6_ifextra *xtra;
496 boolean_t privileged;
500 if (priv_check(td, PRIV_ROOT) == 0)
512 return in6_lifaddr_ioctl(cmd, data, ifp, td);
516 case SIOCGETSGCNT_IN6:
517 case SIOCGETMIFCNT_IN6:
518 return (mrt6_ioctl(cmd, data));
522 case SIOCAADDRCTL_POLICY:
523 case SIOCDADDRCTL_POLICY:
526 return (in6_src_ioctl(cmd, data));
533 case SIOCSNDFLUSH_IN6:
534 case SIOCSPFXFLUSH_IN6:
535 case SIOCSRTRFLUSH_IN6:
536 case SIOCSDEFIFACE_IN6:
537 case SIOCSIFINFO_FLAGS:
541 case OSIOCGIFINFO_IN6:
542 case SIOCGIFINFO_IN6:
545 case SIOCGNBRINFO_IN6:
546 case SIOCGDEFIFACE_IN6:
547 return (nd6_ioctl(cmd, data, ifp));
554 return (scope6_set(ifp,
555 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
558 return (scope6_get(ifp,
559 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
562 return (scope6_get_default((struct scope6_id *)
563 ifr->ifr_ifru.ifru_scope_id));
567 * Find address for this interface, if it exists.
569 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
570 struct sockaddr_in6 *sa6 =
571 (struct sockaddr_in6 *)&ifra->ifra_addr;
573 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
574 if (sa6->sin6_addr.s6_addr16[1] == 0) {
575 /* Link ID is not embedded by the user */
576 sa6->sin6_addr.s6_addr16[1] =
577 htons(ifp->if_index);
578 } else if (sa6->sin6_addr.s6_addr16[1] !=
579 htons(ifp->if_index)) {
580 /* Link ID contradicts */
583 if (sa6->sin6_scope_id) {
584 if (sa6->sin6_scope_id !=
585 (u_int32_t)ifp->if_index)
587 sa6->sin6_scope_id = 0; /* XXX: good way? */
590 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
594 case SIOCDIFADDR_IN6:
596 * For IPv4, we look for existing in_ifaddr here to allow
597 * "ifconfig if0 delete" to remove first IPv4 address on the
598 * interface. For IPv6, as the spec allow multiple interface
599 * address from the day one, we consider "remove the first one"
600 * semantics to be not preferable.
603 return (EADDRNOTAVAIL);
605 case SIOCAIFADDR_IN6:
607 * We always require users to specify a valid IPv6 address for
608 * the corresponding operation.
610 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
611 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
612 return (EAFNOSUPPORT);
617 case SIOCGIFADDR_IN6:
618 /* This interface is basically deprecated. Use SIOCGIFCONF. */
620 case SIOCGIFAFLAG_IN6:
621 case SIOCGIFNETMASK_IN6:
622 case SIOCGIFDSTADDR_IN6:
623 case SIOCGIFALIFETIME_IN6:
624 /* Must think again about its semantics */
626 return (EADDRNOTAVAIL);
629 case SIOCSIFALIFETIME_IN6:
631 const struct in6_addrlifetime *lt;
636 return (EADDRNOTAVAIL);
637 /* Sanity for overflow - beware unsigned */
638 lt = &ifr->ifr_ifru.ifru_lifetime;
639 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
640 lt->ia6t_vltime + time_uptime < time_uptime)
642 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
643 lt->ia6t_pltime + time_uptime < time_uptime)
650 case SIOCGIFADDR_IN6:
651 ifr->ifr_addr = ia->ia_addr;
654 case SIOCGIFDSTADDR_IN6:
655 if (!(ifp->if_flags & IFF_POINTOPOINT))
658 * XXX: Should we check if ifa_dstaddr is NULL and return
661 ifr->ifr_dstaddr = ia->ia_dstaddr;
664 case SIOCGIFNETMASK_IN6:
665 ifr->ifr_addr = ia->ia_prefixmask;
668 case SIOCGIFAFLAG_IN6:
669 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
672 case SIOCGIFSTAT_IN6:
673 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
675 bzero(&ifr->ifr_ifru.ifru_stat,
676 sizeof(ifr->ifr_ifru.ifru_stat));
677 ifr->ifr_ifru.ifru_stat = *xtra->in6_ifstat;
680 case SIOCGIFSTAT_ICMP6:
681 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
683 bzero(&ifr->ifr_ifru.ifru_stat,
684 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
685 ifr->ifr_ifru.ifru_icmp6stat = *xtra->icmp6_ifstat;
688 case SIOCGIFALIFETIME_IN6:
689 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
692 case SIOCSIFALIFETIME_IN6:
693 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
694 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
695 ia->ia6_lifetime.ia6t_expire =
696 time_uptime + ia->ia6_lifetime.ia6t_vltime;
698 ia->ia6_lifetime.ia6t_expire = 0;
700 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
701 ia->ia6_lifetime.ia6t_preferred =
702 time_uptime + ia->ia6_lifetime.ia6t_pltime;
704 ia->ia6_lifetime.ia6t_preferred = 0;
708 case SIOCAIFADDR_IN6:
710 int i, error = 0, iaIsNew;
711 struct nd_prefix pr0, *pr;
719 * First, make or update the interface address structure,
720 * and link it to the list.
722 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
726 * Then, make the prefix on-link on the interface.
727 * XXX: We'd rather create the prefix before the address, but
728 * we need at least one address to install the corresponding
729 * interface route, so we configure the address first.
733 * Convert mask to prefix length (prefixmask has already
734 * been validated in in6_update_ifa().
736 bzero(&pr0, sizeof(pr0));
738 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
740 if (pr0.ndpr_plen == 128)
741 break; /* no need to install a host route. */
742 pr0.ndpr_prefix = ifra->ifra_addr;
743 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
744 /* Apply the mask for safety. */
745 for (i = 0; i < 4; i++) {
746 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
747 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
750 * XXX: Since we don't have an API to set prefix (not address)
751 * lifetimes, we just use the same lifetimes as addresses.
752 * The (temporarily) installed lifetimes can be overridden by
753 * later advertised RAs (when accept_rtadv is non 0), which is
754 * an intended behavior.
756 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
758 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
759 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
760 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
762 /* Add the prefix if there's one. */
763 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
765 * nd6_prelist_add will install the corresponding
768 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
771 log(LOG_ERR, "nd6_prelist_add succeeded but "
773 return (EINVAL); /* XXX panic here? */
777 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
779 /* XXX: This should not happen! */
780 log(LOG_ERR, "in6_control: addition succeeded, but"
783 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
784 ia->ia6_ndpr == NULL) {
786 * New autoconf address
792 * If this is the first autoconf address from
793 * the prefix, create a temporary address
794 * as well (when specified).
796 if (ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
799 if ((e = in6_tmpifadd(ia, 1)) != 0) {
800 log(LOG_NOTICE, "in6_control: "
801 "failed to create a "
802 "temporary address, "
809 * This might affect the status of autoconfigured
810 * addresses, that is, this address might make
811 * other addresses detached.
813 pfxlist_onlink_check();
815 if (error == 0 && ia) {
816 EVENTHANDLER_INVOKE(ifaddr_event, ifp,
817 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE,
823 case SIOCDIFADDR_IN6:
826 struct nd_prefix pr0, *pr;
829 * If the address being deleted is the only one that owns
830 * the corresponding prefix, expire the prefix as well.
831 * XXX: Theoretically, we don't have to warry about such
832 * relationship, since we separate the address management
833 * and the prefix management. We do this, however, to provide
834 * as much backward compatibility as possible in terms of
835 * the ioctl operation.
837 bzero(&pr0, sizeof(pr0));
839 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
841 if (pr0.ndpr_plen == 128)
843 pr0.ndpr_prefix = ia->ia_addr;
844 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
845 for (i = 0; i < 4; i++) {
846 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
847 ia->ia_prefixmask.sin6_addr.s6_addr32[i];
850 * The logic of the following condition is a bit complicated.
851 * We expire the prefix when
852 * 1. The address obeys autoconfiguration and it is the
853 * only owner of the associated prefix, or
854 * 2. The address does not obey autoconf and there is no
855 * other owner of the prefix.
857 if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
858 (((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
859 pr->ndpr_refcnt == 1) ||
860 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) &&
861 pr->ndpr_refcnt == 0)))
862 pr->ndpr_expire = 1; /* XXX: just for expiration */
865 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE,
867 in6_purgeaddr(&ia->ia_ifa);
872 if (ifp->if_ioctl == NULL)
874 ifnet_serialize_all(ifp);
875 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
876 ifnet_deserialize_all(ifp);
884 * Update parameters of an IPv6 interface address.
885 * If necessary, a new entry is created and linked into address chains.
886 * This function is separated from in6_control().
887 * XXX: should this be performed under splnet()?
890 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
891 struct in6_ifaddr *ia)
893 int error = 0, hostIsNew = 0, plen = -1;
894 struct in6_ifaddr *oia;
895 struct sockaddr_in6 dst6;
896 struct in6_addrlifetime *lt;
898 /* Validate parameters */
899 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
903 * The destination address for a p2p link must have a family
904 * of AF_UNSPEC or AF_INET6.
906 if ((ifp->if_flags & IFF_POINTOPOINT) &&
907 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
908 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
909 return (EAFNOSUPPORT);
911 * validate ifra_prefixmask. don't check sin6_family, netmask
912 * does not carry fields other than sin6_len.
914 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
917 * Because the IPv6 address architecture is classless, we require
918 * users to specify a (non 0) prefix length (mask) for a new address.
919 * We also require the prefix (when specified) mask is valid, and thus
920 * reject a non-consecutive mask.
922 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
924 if (ifra->ifra_prefixmask.sin6_len != 0) {
925 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
926 (u_char *)&ifra->ifra_prefixmask +
927 ifra->ifra_prefixmask.sin6_len);
933 * In this case, ia must not be NULL. We just use its prefix
936 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
939 * If the destination address on a p2p interface is specified,
940 * and the address is a scoped one, validate/set the scope
943 dst6 = ifra->ifra_dstaddr;
944 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
945 (dst6.sin6_family == AF_INET6)) {
948 if ((error = in6_recoverscope(&dst6,
949 &ifra->ifra_dstaddr.sin6_addr,
952 scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
953 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
954 dst6.sin6_scope_id = scopeid;
955 else if (dst6.sin6_scope_id != scopeid)
956 return (EINVAL); /* scope ID mismatch. */
957 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
960 dst6.sin6_scope_id = 0; /* XXX */
963 * The destination address can be specified only for a p2p or a
964 * loopback interface. If specified, the corresponding prefix length
967 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
968 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
969 /* XXX: noisy message */
970 log(LOG_INFO, "in6_update_ifa: a destination can be "
971 "specified for a p2p or a loopback IF only\n");
976 * The following message seems noisy, but we dare to
977 * add it for diagnosis.
979 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
980 "when dstaddr is specified\n");
984 /* lifetime consistency check */
985 lt = &ifra->ifra_lifetime;
986 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
987 && lt->ia6t_vltime + time_uptime < time_uptime) {
990 if (lt->ia6t_vltime == 0) {
992 * the following log might be noisy, but this is a typical
993 * configuration mistake or a tool's bug.
996 "in6_update_ifa: valid lifetime is 0 for %s\n",
997 ip6_sprintf(&ifra->ifra_addr.sin6_addr));
999 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
1000 && lt->ia6t_pltime + time_uptime < time_uptime) {
1005 * If this is a new address, allocate a new ifaddr and link it
1011 * When in6_update_ifa() is called in a process of a received
1012 * RA, it is called under splnet(). So, we should call malloc
1015 ia = ifa_create(sizeof(*ia), M_NOWAIT);
1018 /* Initialize the address and masks */
1019 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1020 ia->ia_addr.sin6_family = AF_INET6;
1021 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1022 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1024 * XXX: some functions expect that ifa_dstaddr is not
1025 * NULL for p2p interfaces.
1027 ia->ia_ifa.ifa_dstaddr
1028 = (struct sockaddr *)&ia->ia_dstaddr;
1030 ia->ia_ifa.ifa_dstaddr = NULL;
1032 ia->ia_ifa.ifa_netmask
1033 = (struct sockaddr *)&ia->ia_prefixmask;
1036 if ((oia = in6_ifaddr) != NULL) {
1037 for ( ; oia->ia_next; oia = oia->ia_next)
1043 ifa_iflink(&ia->ia_ifa, ifp, 1);
1046 /* set prefix mask */
1047 if (ifra->ifra_prefixmask.sin6_len) {
1049 * We prohibit changing the prefix length of an existing
1051 * + such an operation should be rare in IPv6, and
1052 * + the operation would confuse prefix management.
1054 if (ia->ia_prefixmask.sin6_len &&
1055 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1056 log(LOG_INFO, "in6_update_ifa: the prefix length of an"
1057 " existing (%s) address should not be changed\n",
1058 ip6_sprintf(&ia->ia_addr.sin6_addr));
1062 ia->ia_prefixmask = ifra->ifra_prefixmask;
1066 * If a new destination address is specified, scrub the old one and
1067 * install the new destination. Note that the interface must be
1068 * p2p or loopback (see the check above.)
1070 if (dst6.sin6_family == AF_INET6 &&
1071 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
1072 &ia->ia_dstaddr.sin6_addr)) {
1075 if ((ia->ia_flags & IFA_ROUTE) &&
1076 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1078 log(LOG_ERR, "in6_update_ifa: failed to remove "
1079 "a route to the old destination: %s\n",
1080 ip6_sprintf(&ia->ia_addr.sin6_addr));
1081 /* proceed anyway... */
1084 ia->ia_flags &= ~IFA_ROUTE;
1085 ia->ia_dstaddr = dst6;
1088 /* reset the interface and routing table appropriately. */
1089 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1093 * Beyond this point, we should call in6_purgeaddr upon an error,
1094 * not just go to unlink.
1097 if (ifp->if_flags & IFF_MULTICAST) {
1098 struct sockaddr_in6 mltaddr, mltmask;
1099 struct in6_multi *in6m;
1103 * join solicited multicast addr for new host id
1105 struct in6_addr llsol;
1106 bzero(&llsol, sizeof(struct in6_addr));
1107 llsol.s6_addr16[0] = htons(0xff02);
1108 llsol.s6_addr16[1] = htons(ifp->if_index);
1109 llsol.s6_addr32[1] = 0;
1110 llsol.s6_addr32[2] = htonl(1);
1111 llsol.s6_addr32[3] =
1112 ifra->ifra_addr.sin6_addr.s6_addr32[3];
1113 llsol.s6_addr8[12] = 0xff;
1114 in6_addmulti(&llsol, ifp, &error);
1117 "in6_update_ifa: addmulti failed for "
1118 "%s on %s (errno=%d)\n",
1119 ip6_sprintf(&llsol), if_name(ifp),
1121 in6_purgeaddr((struct ifaddr *)ia);
1126 bzero(&mltmask, sizeof(mltmask));
1127 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1128 mltmask.sin6_family = AF_INET6;
1129 mltmask.sin6_addr = in6mask32;
1132 * join link-local all-nodes address
1134 bzero(&mltaddr, sizeof(mltaddr));
1135 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1136 mltaddr.sin6_family = AF_INET6;
1137 mltaddr.sin6_addr = kin6addr_linklocal_allnodes;
1138 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
1140 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1142 rtrequest_global(RTM_ADD,
1143 (struct sockaddr *)&mltaddr,
1144 (struct sockaddr *)&ia->ia_addr,
1145 (struct sockaddr *)&mltmask,
1146 RTF_UP|RTF_CLONING); /* xxx */
1147 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1150 "in6_update_ifa: addmulti failed for "
1151 "%s on %s (errno=%d)\n",
1152 ip6_sprintf(&mltaddr.sin6_addr),
1153 if_name(ifp), error);
1158 * join node information group address
1160 #define hostnamelen strlen(hostname)
1161 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
1163 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1164 if (in6m == NULL && ia != NULL) {
1165 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1167 log(LOG_WARNING, "in6_update_ifa: "
1168 "addmulti failed for "
1169 "%s on %s (errno=%d)\n",
1170 ip6_sprintf(&mltaddr.sin6_addr),
1171 if_name(ifp), error);
1178 * join node-local all-nodes address, on loopback.
1179 * XXX: since "node-local" is obsoleted by interface-local,
1180 * we have to join the group on every interface with
1181 * some interface-boundary restriction.
1183 if (ifp->if_flags & IFF_LOOPBACK) {
1184 struct in6_ifaddr *ia_loop;
1186 struct in6_addr loop6 = kin6addr_loopback;
1187 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
1189 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes;
1191 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1192 if (in6m == NULL && ia_loop != NULL) {
1193 rtrequest_global(RTM_ADD,
1194 (struct sockaddr *)&mltaddr,
1195 (struct sockaddr *)&ia_loop->ia_addr,
1196 (struct sockaddr *)&mltmask,
1198 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1200 log(LOG_WARNING, "in6_update_ifa: "
1201 "addmulti failed for %s on %s "
1203 ip6_sprintf(&mltaddr.sin6_addr),
1204 if_name(ifp), error);
1210 ia->ia6_flags = ifra->ifra_flags;
1211 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
1212 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
1214 ia->ia6_lifetime = ifra->ifra_lifetime;
1216 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1217 ia->ia6_lifetime.ia6t_expire =
1218 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1220 ia->ia6_lifetime.ia6t_expire = 0;
1221 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1222 ia->ia6_lifetime.ia6t_preferred =
1223 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1225 ia->ia6_lifetime.ia6t_preferred = 0;
1228 * Perform DAD, if needed.
1229 * XXX It may be of use, if we can administratively
1232 if (in6if_do_dad(ifp) && !(ifra->ifra_flags & IN6_IFF_NODAD)) {
1233 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1234 nd6_dad_start((struct ifaddr *)ia, NULL);
1241 * XXX: if a change of an existing address failed, keep the entry
1245 in6_unlink_ifa(ia, ifp);
1250 in6_purgeaddr(struct ifaddr *ifa)
1252 struct ifnet *ifp = ifa->ifa_ifp;
1253 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1255 /* stop DAD processing */
1259 * delete route to the destination of the address being purged.
1260 * The interface must be p2p or loopback in this case.
1262 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) {
1265 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1267 log(LOG_ERR, "in6_purgeaddr: failed to remove "
1268 "a route to the p2p destination: %s on %s, "
1270 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
1272 /* proceed anyway... */
1275 ia->ia_flags &= ~IFA_ROUTE;
1278 /* Remove ownaddr's loopback rtentry, if it exists. */
1279 in6_ifremloop(&(ia->ia_ifa));
1281 if (ifp->if_flags & IFF_MULTICAST) {
1283 * delete solicited multicast addr for deleting host id
1285 struct in6_multi *in6m;
1286 struct in6_addr llsol;
1287 bzero(&llsol, sizeof(struct in6_addr));
1288 llsol.s6_addr16[0] = htons(0xff02);
1289 llsol.s6_addr16[1] = htons(ifp->if_index);
1290 llsol.s6_addr32[1] = 0;
1291 llsol.s6_addr32[2] = htonl(1);
1292 llsol.s6_addr32[3] =
1293 ia->ia_addr.sin6_addr.s6_addr32[3];
1294 llsol.s6_addr8[12] = 0xff;
1296 in6m = IN6_LOOKUP_MULTI(&llsol, ifp);
1301 in6_unlink_ifa(ia, ifp);
1305 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1307 struct in6_ifaddr *oia;
1311 ifa_ifunlink(&ia->ia_ifa, ifp);
1314 if (oia == (ia = in6_ifaddr))
1315 in6_ifaddr = ia->ia_next;
1317 while (ia->ia_next && (ia->ia_next != oia))
1320 ia->ia_next = oia->ia_next;
1323 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1328 * When an autoconfigured address is being removed, release the
1329 * reference to the base prefix. Also, since the release might
1330 * affect the status of other (detached) addresses, call
1331 * pfxlist_onlink_check().
1333 if (oia->ia6_flags & IN6_IFF_AUTOCONF) {
1334 if (oia->ia6_ndpr == NULL) {
1335 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
1336 "%p has no prefix\n", oia);
1338 oia->ia6_ndpr->ndpr_refcnt--;
1339 oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
1340 oia->ia6_ndpr = NULL;
1343 pfxlist_onlink_check();
1347 * release another refcnt for the link from in6_ifaddr.
1348 * Note that we should decrement the refcnt at least once for all *BSD.
1350 ifa_destroy(&oia->ia_ifa);
1356 in6_purgeif(struct ifnet *ifp)
1358 struct ifaddr_container *ifac, *next;
1360 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
1362 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1364 in6_purgeaddr(ifac->ifa);
1372 * SIOCGLIFADDR: get first address. (?)
1373 * SIOCGLIFADDR with IFLR_PREFIX:
1374 * get first address that matches the specified prefix.
1375 * SIOCALIFADDR: add the specified address.
1376 * SIOCALIFADDR with IFLR_PREFIX:
1377 * add the specified prefix, filling hostid part from
1378 * the first link-local address. prefixlen must be <= 64.
1379 * SIOCDLIFADDR: delete the specified address.
1380 * SIOCDLIFADDR with IFLR_PREFIX:
1381 * delete the first address that matches the specified prefix.
1383 * EINVAL on invalid parameters
1384 * EADDRNOTAVAIL on prefix match failed/specified address not found
1385 * other values may be returned from in6_ioctl()
1387 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1388 * this is to accomodate address naming scheme other than RFC2374,
1390 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1391 * address encoding scheme. (see figure on page 8)
1394 in6_lifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp,
1397 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1398 struct sockaddr *sa;
1401 if (!data || !ifp) {
1402 panic("invalid argument to in6_lifaddr_ioctl");
1408 /* address must be specified on GET with IFLR_PREFIX */
1409 if (!(iflr->flags & IFLR_PREFIX))
1414 /* address must be specified on ADD and DELETE */
1415 sa = (struct sockaddr *)&iflr->addr;
1416 if (sa->sa_family != AF_INET6)
1418 if (sa->sa_len != sizeof(struct sockaddr_in6))
1420 /* XXX need improvement */
1421 sa = (struct sockaddr *)&iflr->dstaddr;
1422 if (sa->sa_family && sa->sa_family != AF_INET6)
1424 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1427 default: /* shouldn't happen */
1429 panic("invalid cmd to in6_lifaddr_ioctl");
1435 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1441 struct in6_aliasreq ifra;
1442 struct in6_addr *hostid = NULL;
1445 if (iflr->flags & IFLR_PREFIX) {
1447 struct sockaddr_in6 *sin6;
1450 * hostid is to fill in the hostid part of the
1451 * address. hostid points to the first link-local
1452 * address attached to the interface.
1454 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1456 return EADDRNOTAVAIL;
1457 hostid = IFA_IN6(ifa);
1459 /* prefixlen must be <= 64. */
1460 if (64 < iflr->prefixlen)
1462 prefixlen = iflr->prefixlen;
1464 /* hostid part must be zero. */
1465 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1466 if (sin6->sin6_addr.s6_addr32[2] != 0
1467 || sin6->sin6_addr.s6_addr32[3] != 0) {
1471 prefixlen = iflr->prefixlen;
1473 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1474 bzero(&ifra, sizeof(ifra));
1475 bcopy(iflr->iflr_name, ifra.ifra_name,
1476 sizeof(ifra.ifra_name));
1478 bcopy(&iflr->addr, &ifra.ifra_addr,
1479 ((struct sockaddr *)&iflr->addr)->sa_len);
1481 /* fill in hostid part */
1482 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1483 hostid->s6_addr32[2];
1484 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1485 hostid->s6_addr32[3];
1488 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
1489 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1490 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1492 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1493 hostid->s6_addr32[2];
1494 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1495 hostid->s6_addr32[3];
1499 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1500 in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1502 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1503 return in6_control_internal(SIOCAIFADDR_IN6, (caddr_t)&ifra,
1509 struct ifaddr_container *ifac;
1510 struct in6_ifaddr *ia;
1511 struct in6_addr mask, candidate, match;
1512 struct sockaddr_in6 *sin6;
1515 bzero(&mask, sizeof(mask));
1516 if (iflr->flags & IFLR_PREFIX) {
1517 /* lookup a prefix rather than address. */
1518 in6_len2mask(&mask, iflr->prefixlen);
1520 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1521 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1522 match.s6_addr32[0] &= mask.s6_addr32[0];
1523 match.s6_addr32[1] &= mask.s6_addr32[1];
1524 match.s6_addr32[2] &= mask.s6_addr32[2];
1525 match.s6_addr32[3] &= mask.s6_addr32[3];
1527 /* if you set extra bits, that's wrong */
1528 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1533 if (cmd == SIOCGLIFADDR) {
1534 /* on getting an address, take the 1st match */
1537 /* on deleting an address, do exact match */
1538 in6_len2mask(&mask, 128);
1539 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1540 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1546 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1547 struct ifaddr *ifa = ifac->ifa;
1549 if (ifa->ifa_addr->sa_family != AF_INET6)
1554 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1556 * XXX: this is adhoc, but is necessary to allow
1557 * a user to specify fe80::/64 (not /10) for a
1558 * link-local address.
1560 if (IN6_IS_ADDR_LINKLOCAL(&candidate))
1561 candidate.s6_addr16[1] = 0;
1562 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1563 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1564 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1565 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1566 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1570 return EADDRNOTAVAIL;
1571 ia = ifa2ia6(ifac->ifa);
1573 if (cmd == SIOCGLIFADDR) {
1574 struct sockaddr_in6 *s6;
1576 /* fill in the if_laddrreq structure */
1577 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1578 s6 = (struct sockaddr_in6 *)&iflr->addr;
1579 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1580 s6->sin6_addr.s6_addr16[1] = 0;
1582 in6_addr2scopeid(ifp, &s6->sin6_addr);
1584 if (ifp->if_flags & IFF_POINTOPOINT) {
1585 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1586 ia->ia_dstaddr.sin6_len);
1587 s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
1588 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1589 s6->sin6_addr.s6_addr16[1] = 0;
1591 in6_addr2scopeid(ifp,
1595 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1598 in6_mask2len(&ia->ia_prefixmask.sin6_addr,
1601 iflr->flags = ia->ia6_flags; /* XXX */
1605 struct in6_aliasreq ifra;
1607 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1608 bzero(&ifra, sizeof(ifra));
1609 bcopy(iflr->iflr_name, ifra.ifra_name,
1610 sizeof(ifra.ifra_name));
1612 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1613 ia->ia_addr.sin6_len);
1614 if (ifp->if_flags & IFF_POINTOPOINT)
1615 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1616 ia->ia_dstaddr.sin6_len);
1618 bzero(&ifra.ifra_dstaddr,
1619 sizeof(ifra.ifra_dstaddr));
1620 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1621 ia->ia_prefixmask.sin6_len);
1623 ifra.ifra_flags = ia->ia6_flags;
1624 return in6_control_internal(SIOCDIFADDR_IN6,
1625 (caddr_t)&ifra, ifp, td);
1630 return EOPNOTSUPP; /* just for safety */
1634 * Initialize an interface's intetnet6 address
1635 * and routing table entry.
1638 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6,
1641 int error = 0, plen, ifacount = 0;
1642 struct ifaddr_container *ifac;
1645 * Give the interface a chance to initialize
1646 * if this is its first address,
1647 * and to validate the address if necessary.
1649 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1650 if (ifac->ifa->ifa_addr == NULL)
1651 continue; /* just for safety */
1652 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1657 ifnet_serialize_all(ifp);
1659 ia->ia_addr = *sin6;
1661 if (ifacount <= 1 && ifp->if_ioctl &&
1662 (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia, NULL))) {
1663 ifnet_deserialize_all(ifp);
1667 ifnet_deserialize_all(ifp);
1669 ia->ia_ifa.ifa_metric = ifp->if_metric;
1671 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1675 * If the destination address is specified for a point-to-point
1676 * interface, install a route to the destination as an interface
1679 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1680 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
1681 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
1682 RTF_UP | RTF_HOST)) != 0)
1684 ia->ia_flags |= IFA_ROUTE;
1688 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1690 ia->ia_ifa.ifa_flags |= RTF_CLONING;
1693 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1695 /* set the rtrequest function to create llinfo */
1696 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
1697 in6_ifaddloop(&(ia->ia_ifa));
1703 struct in6_multi_mship *
1704 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp)
1706 struct in6_multi_mship *imm;
1708 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT);
1713 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp);
1714 if (!imm->i6mm_maddr) {
1715 /* *errorp is alrady set */
1716 kfree(imm, M_IPMADDR);
1723 in6_leavegroup(struct in6_multi_mship *imm)
1726 if (imm->i6mm_maddr)
1727 in6_delmulti(imm->i6mm_maddr);
1728 kfree(imm, M_IPMADDR);
1733 * Add an address to the list of IP6 multicast addresses for a
1737 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp)
1739 struct in6_multi *in6m;
1740 struct sockaddr_in6 sin6;
1741 struct ifmultiaddr *ifma;
1748 * Call generic routine to add membership or increment
1749 * refcount. It wants addresses in the form of a sockaddr,
1750 * so we build one here (being careful to zero the unused bytes).
1752 bzero(&sin6, sizeof sin6);
1753 sin6.sin6_family = AF_INET6;
1754 sin6.sin6_len = sizeof sin6;
1755 sin6.sin6_addr = *maddr6;
1756 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
1763 * If ifma->ifma_protospec is null, then if_addmulti() created
1764 * a new record. Otherwise, we are done.
1766 if (ifma->ifma_protospec != NULL) {
1768 return ifma->ifma_protospec;
1771 /* XXX - if_addmulti uses M_WAITOK. Can this really be called
1772 at interrupt time? If so, need to fix if_addmulti. XXX */
1773 in6m = (struct in6_multi *)kmalloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT);
1779 bzero(in6m, sizeof *in6m);
1780 in6m->in6m_addr = *maddr6;
1781 in6m->in6m_ifp = ifp;
1782 in6m->in6m_ifma = ifma;
1783 ifma->ifma_protospec = in6m;
1784 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
1787 * Let MLD6 know that we have joined a new IP6 multicast
1790 mld6_start_listening(in6m);
1796 * Delete a multicast address record.
1799 in6_delmulti(struct in6_multi *in6m)
1801 struct ifmultiaddr *ifma = in6m->in6m_ifma;
1805 if (ifma->ifma_refcount == 1) {
1807 * No remaining claims to this record; let MLD6 know
1808 * that we are leaving the multicast group.
1810 mld6_stop_listening(in6m);
1811 ifma->ifma_protospec = NULL;
1812 LIST_REMOVE(in6m, in6m_entry);
1813 kfree(in6m, M_IPMADDR);
1815 /* XXX - should be separate API for when we have an ifma? */
1816 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
1821 * Find an IPv6 interface link-local address specific to an interface.
1824 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1826 const struct ifaddr_container *ifac;
1828 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1829 struct ifaddr *ifa = ifac->ifa;
1831 if (ifa->ifa_addr == NULL)
1832 continue; /* just for safety */
1833 if (ifa->ifa_addr->sa_family != AF_INET6)
1835 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1836 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1839 return (struct in6_ifaddr *)ifa;
1847 * find the internet address corresponding to a given interface and address.
1850 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1852 const struct ifaddr_container *ifac;
1854 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1855 struct ifaddr *ifa = ifac->ifa;
1857 if (ifa->ifa_addr == NULL)
1858 continue; /* just for safety */
1859 if (ifa->ifa_addr->sa_family != AF_INET6)
1861 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
1862 return (struct in6_ifaddr *)ifa;
1868 * Find a link-local scoped address on ifp and return it if any.
1871 in6ifa_llaonifp(struct ifnet *ifp)
1873 const struct ifaddr_container *ifac;
1875 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1876 const struct sockaddr_in6 *sin6;
1877 struct ifaddr *ifa = ifac->ifa;
1879 if (ifa->ifa_addr->sa_family != AF_INET6)
1881 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
1882 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1883 /* XXX why are mcast addresses ifp address list? */
1884 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1885 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1886 return (struct in6_ifaddr *)ifa;
1892 * find the internet address on a given interface corresponding to a neighbor's
1896 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr)
1899 struct in6_ifaddr *ia;
1900 struct ifaddr_container *ifac;
1902 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1905 if (ifa->ifa_addr == NULL)
1906 continue; /* just for safety */
1907 if (ifa->ifa_addr->sa_family != AF_INET6)
1909 ia = (struct in6_ifaddr *)ifa;
1910 if (IN6_ARE_MASKED_ADDR_EQUAL(addr,
1911 &ia->ia_addr.sin6_addr,
1912 &ia->ia_prefixmask.sin6_addr))
1920 * Convert IP6 address to printable (loggable) representation.
1922 static char digits[] = "0123456789abcdef";
1923 static int ip6round = 0;
1925 ip6_sprintf(const struct in6_addr *addr)
1927 static char ip6buf[8][48];
1930 const u_short *a = (const u_short *)addr;
1934 ip6round = (ip6round + 1) & 7;
1935 cp = ip6buf[ip6round];
1937 for (i = 0; i < 8; i++) {
1948 if (dcolon == 0 && *(a + 1) == 0) {
1960 d = (const u_char *)a;
1961 *cp++ = digits[*d >> 4];
1962 *cp++ = digits[*d++ & 0xf];
1963 *cp++ = digits[*d >> 4];
1964 *cp++ = digits[*d & 0xf];
1969 return (ip6buf[ip6round]);
1973 in6_localaddr(struct in6_addr *in6)
1975 struct in6_ifaddr *ia;
1977 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1980 for (ia = in6_ifaddr; ia; ia = ia->ia_next)
1981 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1982 &ia->ia_prefixmask.sin6_addr))
1989 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1991 struct in6_ifaddr *ia;
1993 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
1994 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
1996 (ia->ia6_flags & IN6_IFF_DEPRECATED))
1997 return (1); /* true */
1999 /* XXX: do we still have to go thru the rest of the list? */
2002 return (0); /* false */
2006 * return length of part which dst and src are equal
2010 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2013 u_char *s = (u_char *)src, *d = (u_char *)dst;
2014 u_char *lim = s + 16, r;
2017 if ((r = (*d++ ^ *s++)) != 0) {
2028 /* XXX: to be scope conscious */
2030 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2032 int bytelen, bitlen;
2035 if (0 > len || len > 128) {
2036 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2044 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2046 if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
2047 p2->s6_addr[bytelen] >> (8 - bitlen))
2054 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2056 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2057 int bytelen, bitlen, i;
2060 if (0 > len || len > 128) {
2061 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2066 bzero(maskp, sizeof(*maskp));
2069 for (i = 0; i < bytelen; i++)
2070 maskp->s6_addr[i] = 0xff;
2072 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2076 * return the best address out of the same scope
2079 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, struct ucred *cred)
2081 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
2083 struct in6_ifaddr *ifa_best = NULL;
2085 const struct ifnet_array *arr;
2088 if(cred && cred->cr_prison)
2093 kprintf("in6_ifawithscope: output interface is not specified\n");
2099 * We search for all addresses on all interfaces from the beginning.
2100 * Comparing an interface with the outgoing interface will be done
2101 * only at the final stage of tiebreaking.
2103 arr = ifnet_array_get();
2104 for (i = 0; i < arr->ifnet_count; ++i) {
2105 struct ifnet *ifp = arr->ifnet_arr[i];
2106 struct ifaddr_container *ifac;
2109 * We can never take an address that breaks the scope zone
2110 * of the destination.
2112 if (ifp->if_afdata[AF_INET6] == NULL)
2114 if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
2117 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2118 int tlen = -1, dscopecmp, bscopecmp, matchcmp;
2119 struct ifaddr *ifa = ifac->ifa;
2121 if (ifa->ifa_addr->sa_family != AF_INET6)
2124 src_scope = in6_addrscope(IFA_IN6(ifa));
2127 * Don't use an address before completing DAD
2128 * nor a duplicated address.
2130 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2134 /* XXX: is there any case to allow anycasts? */
2135 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2139 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2143 /* Skip adresses not valid for current jail */
2145 !(jailed_ip(cred->cr_prison, (struct sockaddr *)(ifa->ifa_addr)) != 0))
2149 * If this is the first address we find,
2152 if (ifa_best == NULL)
2156 * ifa_best is never NULL beyond this line except
2157 * within the block labeled "replace".
2161 * If ifa_best has a smaller scope than dst and
2162 * the current address has a larger one than
2163 * (or equal to) dst, always replace ifa_best.
2164 * Also, if the current address has a smaller scope
2165 * than dst, ignore it unless ifa_best also has a
2167 * Consequently, after the two if-clause below,
2168 * the followings must be satisfied:
2169 * (scope(src) < scope(dst) &&
2170 * scope(best) < scope(dst))
2172 * (scope(best) >= scope(dst) &&
2173 * scope(src) >= scope(dst))
2175 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
2176 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
2177 goto replace; /* (A) */
2178 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
2179 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
2183 * A deprecated address SHOULD NOT be used in new
2184 * communications if an alternate (non-deprecated)
2185 * address is available and has sufficient scope.
2186 * RFC 2462, Section 5.5.4.
2188 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2189 IN6_IFF_DEPRECATED) {
2191 * Ignore any deprecated addresses if
2192 * specified by configuration.
2194 if (!ip6_use_deprecated)
2198 * If we have already found a non-deprecated
2199 * candidate, just ignore deprecated addresses.
2201 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED))
2206 * A non-deprecated address is always preferred
2207 * to a deprecated one regardless of scopes and
2208 * address matching (Note invariants ensured by the
2209 * conditions (A) and (B) above.)
2211 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
2212 !(((struct in6_ifaddr *)ifa)->ia6_flags &
2213 IN6_IFF_DEPRECATED))
2217 * When we use temporary addresses described in
2218 * RFC 3041, we prefer temporary addresses to
2219 * public autoconf addresses. Again, note the
2220 * invariants from (A) and (B). Also note that we
2221 * don't have any preference between static addresses
2222 * and autoconf addresses (despite of whether or not
2223 * the latter is temporary or public.)
2225 if (ip6_use_tempaddr) {
2226 struct in6_ifaddr *ifat;
2228 ifat = (struct in6_ifaddr *)ifa;
2229 if ((ifa_best->ia6_flags &
2230 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2231 == IN6_IFF_AUTOCONF &&
2233 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2234 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
2237 if ((ifa_best->ia6_flags &
2238 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2239 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
2241 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2242 == IN6_IFF_AUTOCONF) {
2248 * At this point, we have two cases:
2249 * 1. we are looking at a non-deprecated address,
2250 * and ifa_best is also non-deprecated.
2251 * 2. we are looking at a deprecated address,
2252 * and ifa_best is also deprecated.
2253 * Also, we do not have to consider a case where
2254 * the scope of if_best is larger(smaller) than dst and
2255 * the scope of the current address is smaller(larger)
2256 * than dst. Such a case has already been covered.
2257 * Tiebreaking is done according to the following
2259 * - the scope comparison between the address and
2261 * - the scope comparison between the address and
2262 * ifa_best (bscopecmp)
2263 * - if the address match dst longer than ifa_best
2265 * - if the address is on the outgoing I/F (outI/F)
2267 * Roughly speaking, the selection policy is
2268 * - the most important item is scope. The same scope
2269 * is best. Then search for a larger scope.
2270 * Smaller scopes are the last resort.
2271 * - A deprecated address is chosen only when we have
2272 * no address that has an enough scope, but is
2273 * prefered to any addresses of smaller scopes
2274 * (this must be already done above.)
2275 * - addresses on the outgoing I/F are preferred to
2276 * ones on other interfaces if none of above
2277 * tiebreaks. In the table below, the column "bI"
2278 * means if the best_ifa is on the outgoing
2279 * interface, and the column "sI" means if the ifa
2280 * is on the outgoing interface.
2281 * - If there is no other reasons to choose one,
2282 * longest address match against dst is considered.
2284 * The precise decision table is as follows:
2285 * dscopecmp bscopecmp match bI oI | replace?
2286 * N/A equal N/A Y N | No (1)
2287 * N/A equal N/A N Y | Yes (2)
2288 * N/A equal larger N/A | Yes (3)
2289 * N/A equal !larger N/A | No (4)
2290 * larger larger N/A N/A | No (5)
2291 * larger smaller N/A N/A | Yes (6)
2292 * smaller larger N/A N/A | Yes (7)
2293 * smaller smaller N/A N/A | No (8)
2294 * equal smaller N/A N/A | Yes (9)
2295 * equal larger (already done at A above)
2297 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
2298 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
2300 if (bscopecmp == 0) {
2301 struct ifnet *bifp = ifa_best->ia_ifp;
2303 if (bifp == oifp && ifp != oifp) /* (1) */
2305 if (bifp != oifp && ifp == oifp) /* (2) */
2309 * Both bifp and ifp are on the outgoing
2310 * interface, or both two are on a different
2311 * interface from the outgoing I/F.
2312 * now we need address matching against dst
2315 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2316 matchcmp = tlen - blen;
2317 if (matchcmp > 0) /* (3) */
2321 if (dscopecmp > 0) {
2322 if (bscopecmp > 0) /* (5) */
2324 goto replace; /* (6) */
2326 if (dscopecmp < 0) {
2327 if (bscopecmp > 0) /* (7) */
2332 /* now dscopecmp must be 0 */
2334 goto replace; /* (9) */
2337 ifa_best = (struct in6_ifaddr *)ifa;
2338 blen = tlen >= 0 ? tlen :
2339 in6_matchlen(IFA_IN6(ifa), dst);
2340 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
2344 /* count statistics for future improvements */
2345 if (ifa_best == NULL)
2346 ip6stat.ip6s_sources_none++;
2348 if (oifp == ifa_best->ia_ifp)
2349 ip6stat.ip6s_sources_sameif[best_scope]++;
2351 ip6stat.ip6s_sources_otherif[best_scope]++;
2353 if (best_scope == dst_scope)
2354 ip6stat.ip6s_sources_samescope[best_scope]++;
2356 ip6stat.ip6s_sources_otherscope[best_scope]++;
2358 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
2359 ip6stat.ip6s_sources_deprecated[best_scope]++;
2366 * return the best address out of the same scope. if no address was
2367 * found, return the first valid address from designated IF.
2370 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2372 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2373 struct ifaddr_container *ifac;
2374 struct in6_ifaddr *besta = NULL;
2375 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2377 dep[0] = dep[1] = NULL;
2380 * We first look for addresses in the same scope.
2381 * If there is one, return it.
2382 * If two or more, return one which matches the dst longest.
2383 * If none, return one of global addresses assigned other ifs.
2385 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2386 struct ifaddr *ifa = ifac->ifa;
2388 if (ifa->ifa_addr->sa_family != AF_INET6)
2390 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2391 continue; /* XXX: is there any case to allow anycast? */
2392 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2393 continue; /* don't use this interface */
2394 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2396 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2397 if (ip6_use_deprecated)
2398 dep[0] = (struct in6_ifaddr *)ifa;
2402 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2404 * call in6_matchlen() as few as possible
2408 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2409 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2412 besta = (struct in6_ifaddr *)ifa;
2415 besta = (struct in6_ifaddr *)ifa;
2421 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2422 struct ifaddr *ifa = ifac->ifa;
2424 if (ifa->ifa_addr->sa_family != AF_INET6)
2426 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2427 continue; /* XXX: is there any case to allow anycast? */
2428 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2429 continue; /* don't use this interface */
2430 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2432 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2433 if (ip6_use_deprecated)
2434 dep[1] = (struct in6_ifaddr *)ifa;
2438 return (struct in6_ifaddr *)ifa;
2441 /* use the last-resort values, that are, deprecated addresses */
2451 * perform DAD when interface becomes IFF_UP.
2454 in6_if_up_dispatch(netmsg_t nmsg)
2456 struct lwkt_msg *lmsg = &nmsg->lmsg;
2457 struct ifnet *ifp = lmsg->u.ms_resultp;
2458 struct ifaddr_container *ifac;
2459 struct in6_ifaddr *ia;
2460 int dad_delay; /* delay ticks before DAD output */
2462 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
2463 ("not in netisr0"));
2466 * special cases, like 6to4, are handled in in6_ifattach
2468 in6_ifattach(ifp, NULL);
2471 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2472 struct ifaddr *ifa = ifac->ifa;
2474 if (ifa->ifa_addr->sa_family != AF_INET6)
2476 ia = (struct in6_ifaddr *)ifa;
2477 if (ia->ia6_flags & IN6_IFF_TENTATIVE)
2478 nd6_dad_start(ifa, &dad_delay);
2481 lwkt_replymsg(lmsg, 0);
2485 in6_if_up(struct ifnet *ifp)
2487 struct netmsg_base nmsg;
2488 struct lwkt_msg *lmsg = &nmsg.lmsg;
2490 ASSERT_CANDOMSG_NETISR0(curthread);
2492 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0, in6_if_up_dispatch);
2493 lmsg->u.ms_resultp = ifp;
2494 lwkt_domsg(netisr_cpuport(0), lmsg, 0);
2498 in6if_do_dad(struct ifnet *ifp)
2500 if (ifp->if_flags & IFF_LOOPBACK)
2503 switch (ifp->if_type) {
2509 * These interfaces do not have the IFF_LOOPBACK flag,
2510 * but loop packets back. We do not have to do DAD on such
2511 * interfaces. We should even omit it, because loop-backed
2512 * NS would confuse the DAD procedure.
2517 * Our DAD routine requires the interface up and running.
2518 * However, some interfaces can be up before the RUNNING
2519 * status. Additionaly, users may try to assign addresses
2520 * before the interface becomes up (or running).
2521 * We simply skip DAD in such a case as a work around.
2522 * XXX: we should rather mark "tentative" on such addresses,
2523 * and do DAD after the interface becomes ready.
2525 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2526 (IFF_UP|IFF_RUNNING))
2534 * Calculate max IPv6 MTU through all the interfaces and store it
2540 unsigned long maxmtu = 0;
2541 const struct ifnet_array *arr;
2544 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
2545 ("not in netisr0"));
2547 arr = ifnet_array_get();
2548 for (i = 0; i < arr->ifnet_count; ++i) {
2549 struct ifnet *ifp = arr->ifnet_arr[i];
2551 /* this function can be called during ifnet initialization */
2552 if (ifp->if_afdata[AF_INET6] == NULL)
2554 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2555 ND_IFINFO(ifp)->linkmtu > maxmtu)
2556 maxmtu = ND_IFINFO(ifp)->linkmtu;
2558 if (maxmtu) /* update only when maxmtu is positive */
2559 in6_maxmtu = maxmtu;
2563 in6_domifattach(struct ifnet *ifp)
2565 struct in6_ifextra *ext;
2567 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2568 bzero(ext, sizeof(*ext));
2570 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat),
2571 M_IFADDR, M_WAITOK);
2572 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2575 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat),
2576 M_IFADDR, M_WAITOK);
2577 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2579 ext->nd_ifinfo = nd6_ifattach(ifp);
2580 ext->scope6_id = scope6_ifattach(ifp);
2585 in6_domifdetach(struct ifnet *ifp, void *aux)
2587 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2588 scope6_ifdetach(ext->scope6_id);
2589 nd6_ifdetach(ext->nd_ifinfo);
2590 kfree(ext->in6_ifstat, M_IFADDR);
2591 kfree(ext->icmp6_ifstat, M_IFADDR);
2592 kfree(ext, M_IFADDR);