2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $
33 * Copyright (c) 1982, 1986, 1991, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * @(#)in.c 8.2 (Berkeley) 11/15/93
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
66 #include "opt_compat.h"
68 #include "opt_inet6.h"
70 #include <sys/param.h>
71 #include <sys/errno.h>
73 #include <sys/malloc.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/sockio.h>
77 #include <sys/systm.h>
81 #include <sys/kernel.h>
82 #include <sys/syslog.h>
85 #include <net/if_var.h>
86 #include <net/if_types.h>
87 #include <net/route.h>
88 #include <net/if_dl.h>
91 #include <netinet/in.h>
92 #include <netinet/in_var.h>
93 #include <net/if_llatbl.h>
94 #include <netinet/if_ether.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/ip.h>
97 #include <netinet/in_pcb.h>
98 #include <netinet/ip_carp.h>
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
102 #include <netinet6/nd6.h>
103 #include <netinet6/mld6_var.h>
104 #include <netinet6/ip6_mroute.h>
105 #include <netinet6/in6_ifattach.h>
106 #include <netinet6/scope6_var.h>
107 #include <netinet6/in6_pcb.h>
109 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
110 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
113 * Definitions of some costant IP6 addresses.
115 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
116 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
117 const struct in6_addr in6addr_nodelocal_allnodes =
118 IN6ADDR_NODELOCAL_ALLNODES_INIT;
119 const struct in6_addr in6addr_linklocal_allnodes =
120 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
121 const struct in6_addr in6addr_linklocal_allrouters =
122 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
123 const struct in6_addr in6addr_linklocal_allv2routers =
124 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
126 const struct in6_addr in6mask0 = IN6MASK0;
127 const struct in6_addr in6mask32 = IN6MASK32;
128 const struct in6_addr in6mask64 = IN6MASK64;
129 const struct in6_addr in6mask96 = IN6MASK96;
130 const struct in6_addr in6mask128 = IN6MASK128;
132 const struct sockaddr_in6 sa6_any =
133 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
135 static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t,
136 struct ifnet *, struct thread *);
137 static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
138 struct sockaddr_in6 *, int);
139 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
141 int (*faithprefix_p)(struct in6_addr *);
143 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
144 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
147 in6_ifaddloop(struct ifaddr *ifa)
149 struct sockaddr_dl gateway;
150 struct sockaddr_in6 mask, addr;
152 struct in6_ifaddr *ia;
159 * initialize for rtmsg generation
161 bzero(&gateway, sizeof(gateway));
162 gateway.sdl_len = sizeof(gateway);
163 gateway.sdl_family = AF_LINK;
164 if (nd6_need_cache(ifp) != 0) {
166 ifa->ifa_rtrequest = nd6_rtrequest;
167 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
168 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
169 IF_AFDATA_UNLOCK(ifp);
171 ln->la_expire = 0; /* for IPv6 this means permanent */
172 ln->ln_state = ND6_LLINFO_REACHABLE;
174 gateway.sdl_alen = 6;
175 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
176 sizeof(ln->ll_addr));
180 bzero(&rt, sizeof(rt));
181 rt.rt_gateway = (struct sockaddr *)&gateway;
182 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
183 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
184 rt_mask(&rt) = (struct sockaddr *)&mask;
185 rt_key(&rt) = (struct sockaddr *)&addr;
186 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
187 /* Announce arrival of local address to all FIBs. */
188 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
192 in6_ifremloop(struct ifaddr *ifa)
194 struct sockaddr_dl gateway;
195 struct sockaddr_in6 mask, addr;
197 struct in6_ifaddr *ia;
202 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
203 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
204 lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
205 (struct sockaddr *)&mask, LLE_STATIC);
208 * initialize for rtmsg generation
210 bzero(&gateway, sizeof(gateway));
211 gateway.sdl_len = sizeof(gateway);
212 gateway.sdl_family = AF_LINK;
213 gateway.sdl_nlen = 0;
214 gateway.sdl_alen = ifp->if_addrlen;
215 bzero(&rt0, sizeof(rt0));
216 rt0.rt_gateway = (struct sockaddr *)&gateway;
217 rt_mask(&rt0) = (struct sockaddr *)&mask;
218 rt_key(&rt0) = (struct sockaddr *)&addr;
219 rt0.rt_flags = RTF_HOST | RTF_STATIC;
220 /* Announce removal of local address to all FIBs. */
221 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
225 in6_mask2len(struct in6_addr *mask, u_char *lim0)
228 u_char *lim = lim0, *p;
230 /* ignore the scope_id part */
231 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
232 lim = (u_char *)mask + sizeof(*mask);
233 for (p = (u_char *)mask; p < lim; x++, p++) {
239 for (y = 0; y < 8; y++) {
240 if ((*p & (0x80 >> y)) == 0)
246 * when the limit pointer is given, do a stricter check on the
250 if (y != 0 && (*p & (0x00ff >> y)) != 0)
252 for (p = p + 1; p < lim; p++)
260 #ifdef COMPAT_FREEBSD32
261 struct in6_ndifreq32 {
262 char ifname[IFNAMSIZ];
265 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
269 in6_control(struct socket *so, u_long cmd, caddr_t data,
270 struct ifnet *ifp, struct thread *td)
272 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
273 struct in6_ifaddr *ia = NULL;
274 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
275 struct sockaddr_in6 *sa6;
276 int carp_attached = 0;
281 * Compat to make pre-10.x ifconfig(8) operable.
283 if (cmd == OSIOCAIFADDR_IN6)
284 cmd = SIOCAIFADDR_IN6;
287 case SIOCGETSGCNT_IN6:
288 case SIOCGETMIFCNT_IN6:
290 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
291 * We cannot see how that would be needed, so do not adjust the
292 * KPI blindly; more likely should clean up the IPv4 variant.
294 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
298 case SIOCAADDRCTL_POLICY:
299 case SIOCDADDRCTL_POLICY:
301 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
305 return (in6_src_ioctl(cmd, data));
312 case SIOCSNDFLUSH_IN6:
313 case SIOCSPFXFLUSH_IN6:
314 case SIOCSRTRFLUSH_IN6:
315 case SIOCSDEFIFACE_IN6:
316 case SIOCSIFINFO_FLAGS:
317 case SIOCSIFINFO_IN6:
319 error = priv_check(td, PRIV_NETINET_ND6);
324 case OSIOCGIFINFO_IN6:
325 case SIOCGIFINFO_IN6:
328 case SIOCGNBRINFO_IN6:
329 case SIOCGDEFIFACE_IN6:
330 return (nd6_ioctl(cmd, data, ifp));
332 #ifdef COMPAT_FREEBSD32
333 case SIOCGDEFIFACE32_IN6:
335 struct in6_ndifreq ndif;
336 struct in6_ndifreq32 *ndif32;
338 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
342 ndif32 = (struct in6_ndifreq32 *)data;
343 ndif32->ifindex = ndif.ifindex;
350 case SIOCSIFPREFIX_IN6:
351 case SIOCDIFPREFIX_IN6:
352 case SIOCAIFPREFIX_IN6:
353 case SIOCCIFPREFIX_IN6:
354 case SIOCSGIFPREFIX_IN6:
355 case SIOCGIFPREFIX_IN6:
357 "prefix ioctls are now invalidated. "
358 "please use ifconfig.\n");
365 error = priv_check(td, PRIV_NETINET_SCOPE6);
372 return (scope6_ioctl(cmd, data, ifp));
378 error = priv_check(td, PRIV_NET_ADDIFADDR);
382 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
386 error = priv_check(td, PRIV_NET_DELIFADDR);
392 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
396 * Find address for this interface, if it exists.
398 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
399 * only, and used the first interface address as the target of other
400 * operations (without checking ifra_addr). This was because netinet
401 * code/API assumed at most 1 interface address per interface.
402 * Since IPv6 allows a node to assign multiple addresses
403 * on a single interface, we almost always look and check the
404 * presence of ifra_addr, and reject invalid ones here.
405 * It also decreases duplicated code among SIOC*_IN6 operations.
408 case SIOCAIFADDR_IN6:
409 case SIOCSIFPHYADDR_IN6:
410 sa6 = &ifra->ifra_addr;
412 case SIOCSIFADDR_IN6:
413 case SIOCGIFADDR_IN6:
414 case SIOCSIFDSTADDR_IN6:
415 case SIOCSIFNETMASK_IN6:
416 case SIOCGIFDSTADDR_IN6:
417 case SIOCGIFNETMASK_IN6:
418 case SIOCDIFADDR_IN6:
419 case SIOCGIFPSRCADDR_IN6:
420 case SIOCGIFPDSTADDR_IN6:
421 case SIOCGIFAFLAG_IN6:
422 case SIOCSNDFLUSH_IN6:
423 case SIOCSPFXFLUSH_IN6:
424 case SIOCSRTRFLUSH_IN6:
425 case SIOCGIFALIFETIME_IN6:
426 case SIOCSIFALIFETIME_IN6:
427 case SIOCGIFSTAT_IN6:
428 case SIOCGIFSTAT_ICMP6:
429 sa6 = &ifr->ifr_addr;
436 * Although we should pass any non-INET6 ioctl requests
437 * down to driver, we filter some legacy INET requests.
438 * Drivers trust SIOCSIFADDR et al to come from an already
439 * privileged layer, and do not perform any credentials
440 * checks or input validation.
447 if (sa6 && sa6->sin6_family == AF_INET6) {
448 if (sa6->sin6_scope_id != 0)
449 error = sa6_embedscope(sa6, 0);
451 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
454 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
455 &sa6->sin6_addr)) != 0)
457 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
462 case SIOCSIFADDR_IN6:
463 case SIOCSIFDSTADDR_IN6:
464 case SIOCSIFNETMASK_IN6:
466 * Since IPv6 allows a node to assign multiple addresses
467 * on a single interface, SIOCSIFxxx ioctls are deprecated.
469 /* we decided to obsolete this command (20000704) */
473 case SIOCDIFADDR_IN6:
475 * for IPv4, we look for existing in_ifaddr here to allow
476 * "ifconfig if0 delete" to remove the first IPv4 address on
477 * the interface. For IPv6, as the spec allows multiple
478 * interface address from the day one, we consider "remove the
479 * first one" semantics to be not preferable.
482 error = EADDRNOTAVAIL;
486 case SIOCAIFADDR_IN6:
488 * We always require users to specify a valid IPv6 address for
489 * the corresponding operation.
491 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
492 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
493 error = EAFNOSUPPORT;
498 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
499 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
504 case SIOCGIFSTAT_IN6:
505 case SIOCGIFSTAT_ICMP6:
506 if (ifp->if_afdata[AF_INET6] == NULL) {
507 error = EPFNOSUPPORT;
512 case SIOCGIFADDR_IN6:
513 /* This interface is basically deprecated. use SIOCGIFCONF. */
515 case SIOCGIFAFLAG_IN6:
516 case SIOCGIFNETMASK_IN6:
517 case SIOCGIFDSTADDR_IN6:
518 case SIOCGIFALIFETIME_IN6:
519 /* must think again about its semantics */
521 error = EADDRNOTAVAIL;
526 case SIOCSIFALIFETIME_IN6:
528 struct in6_addrlifetime *lt;
531 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
536 error = EADDRNOTAVAIL;
539 /* sanity for overflow - beware unsigned */
540 lt = &ifr->ifr_ifru.ifru_lifetime;
541 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
542 lt->ia6t_vltime + time_uptime < time_uptime) {
546 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
547 lt->ia6t_pltime + time_uptime < time_uptime) {
556 case SIOCGIFADDR_IN6:
557 ifr->ifr_addr = ia->ia_addr;
558 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
562 case SIOCGIFDSTADDR_IN6:
563 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
568 * XXX: should we check if ifa_dstaddr is NULL and return
571 ifr->ifr_dstaddr = ia->ia_dstaddr;
572 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
576 case SIOCGIFNETMASK_IN6:
577 ifr->ifr_addr = ia->ia_prefixmask;
580 case SIOCGIFAFLAG_IN6:
581 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
584 case SIOCGIFSTAT_IN6:
585 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
586 ifp->if_afdata[AF_INET6])->in6_ifstat,
587 &ifr->ifr_ifru.ifru_stat,
588 sizeof(struct in6_ifstat) / sizeof(uint64_t));
591 case SIOCGIFSTAT_ICMP6:
592 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
593 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
594 &ifr->ifr_ifru.ifru_icmp6stat,
595 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
598 case SIOCGIFALIFETIME_IN6:
599 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
600 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
602 struct in6_addrlifetime *retlt =
603 &ifr->ifr_ifru.ifru_lifetime;
606 * XXX: adjust expiration time assuming time_t is
610 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
611 if (ia->ia6_lifetime.ia6t_vltime <
612 maxexpire - ia->ia6_updatetime) {
613 retlt->ia6t_expire = ia->ia6_updatetime +
614 ia->ia6_lifetime.ia6t_vltime;
616 retlt->ia6t_expire = maxexpire;
618 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
620 struct in6_addrlifetime *retlt =
621 &ifr->ifr_ifru.ifru_lifetime;
624 * XXX: adjust expiration time assuming time_t is
628 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
629 if (ia->ia6_lifetime.ia6t_pltime <
630 maxexpire - ia->ia6_updatetime) {
631 retlt->ia6t_preferred = ia->ia6_updatetime +
632 ia->ia6_lifetime.ia6t_pltime;
634 retlt->ia6t_preferred = maxexpire;
638 case SIOCSIFALIFETIME_IN6:
639 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
641 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
642 ia->ia6_lifetime.ia6t_expire =
643 time_uptime + ia->ia6_lifetime.ia6t_vltime;
645 ia->ia6_lifetime.ia6t_expire = 0;
646 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
647 ia->ia6_lifetime.ia6t_preferred =
648 time_uptime + ia->ia6_lifetime.ia6t_pltime;
650 ia->ia6_lifetime.ia6t_preferred = 0;
653 case SIOCAIFADDR_IN6:
656 struct nd_prefixctl pr0;
657 struct nd_prefix *pr;
660 * first, make or update the interface address structure,
661 * and link it to the list.
663 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
666 ifa_free(&ia->ia_ifa);
667 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
670 * this can happen when the user specify the 0 valid
676 if (cmd == ocmd && ifra->ifra_vhid > 0) {
677 if (carp_attach_p != NULL)
678 error = (*carp_attach_p)(&ia->ia_ifa,
681 error = EPROTONOSUPPORT;
689 * then, make the prefix on-link on the interface.
690 * XXX: we'd rather create the prefix before the address, but
691 * we need at least one address to install the corresponding
692 * interface route, so we configure the address first.
696 * convert mask to prefix length (prefixmask has already
697 * been validated in in6_update_ifa().
699 bzero(&pr0, sizeof(pr0));
701 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
703 if (pr0.ndpr_plen == 128) {
704 /* we don't need to install a host route. */
707 pr0.ndpr_prefix = ifra->ifra_addr;
708 /* apply the mask for safety. */
709 for (i = 0; i < 4; i++) {
710 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
711 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
714 * XXX: since we don't have an API to set prefix (not address)
715 * lifetimes, we just use the same lifetimes as addresses.
716 * The (temporarily) installed lifetimes can be overridden by
717 * later advertised RAs (when accept_rtadv is non 0), which is
718 * an intended behavior.
720 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
722 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
723 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
724 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
726 /* add the prefix if not yet. */
727 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
729 * nd6_prelist_add will install the corresponding
732 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
734 (*carp_detach_p)(&ia->ia_ifa);
739 (*carp_detach_p)(&ia->ia_ifa);
740 log(LOG_ERR, "nd6_prelist_add succeeded but "
747 /* relate the address to the prefix */
748 if (ia->ia6_ndpr == NULL) {
753 * If this is the first autoconf address from the
754 * prefix, create a temporary address as well
757 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
758 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
760 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
761 log(LOG_NOTICE, "in6_control: failed "
762 "to create a temporary address, "
769 * this might affect the status of autoconfigured addresses,
770 * that is, this address might make other addresses detached.
772 pfxlist_onlink_check();
774 if (error != 0 || ia == NULL)
777 * Try to clear the flag when a new IPv6 address is added
778 * onto an IFDISABLED interface and it succeeds.
780 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
781 struct in6_ndireq nd;
783 memset(&nd, 0, sizeof(nd));
784 nd.ndi.flags = ND_IFINFO(ifp)->flags;
785 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
786 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
787 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
788 "SIOCSIFINFO_FLAGS for -ifdisabled "
791 * Ignore failure of clearing the flag intentionally.
792 * The failure means address duplication was detected.
795 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
799 case SIOCDIFADDR_IN6:
801 struct nd_prefix *pr;
804 * If the address being deleted is the only one that owns
805 * the corresponding prefix, expire the prefix as well.
806 * XXX: theoretically, we don't have to worry about such
807 * relationship, since we separate the address management
808 * and the prefix management. We do this, however, to provide
809 * as much backward compatibility as possible in terms of
810 * the ioctl operation.
811 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
814 in6_purgeaddr(&ia->ia_ifa);
815 if (pr && pr->ndpr_refcnt == 0)
817 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
822 if (ifp->if_ioctl == NULL) {
826 error = (*ifp->if_ioctl)(ifp, cmd, data);
833 ifa_free(&ia->ia_ifa);
839 * Join necessary multicast groups. Factored out from in6_update_ifa().
840 * This entire work should only be done once, for the default FIB.
843 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
844 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
846 char ip6buf[INET6_ADDRSTRLEN];
847 struct sockaddr_in6 mltaddr, mltmask;
848 struct in6_addr llsol;
849 struct in6_multi_mship *imm;
853 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
855 /* Join solicited multicast addr for new host id. */
856 bzero(&llsol, sizeof(struct in6_addr));
857 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
858 llsol.s6_addr32[1] = 0;
859 llsol.s6_addr32[2] = htonl(1);
860 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
861 llsol.s6_addr8[12] = 0xff;
862 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
863 /* XXX: should not happen */
864 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
868 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
870 * We need a random delay for DAD on the address being
871 * configured. It also means delaying transmission of the
872 * corresponding MLD report to avoid report collision.
873 * [RFC 4861, Section 6.3.7]
875 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
877 imm = in6_joingroup(ifp, &llsol, &error, delay);
879 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
880 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
881 if_name(ifp), error));
884 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
885 *in6m_sol = imm->i6mm_maddr;
887 bzero(&mltmask, sizeof(mltmask));
888 mltmask.sin6_len = sizeof(struct sockaddr_in6);
889 mltmask.sin6_family = AF_INET6;
890 mltmask.sin6_addr = in6mask32;
891 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
894 * Join link-local all-nodes address.
896 bzero(&mltaddr, sizeof(mltaddr));
897 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
898 mltaddr.sin6_family = AF_INET6;
899 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
900 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
901 goto cleanup; /* XXX: should not fail */
904 * XXX: do we really need this automatic routes? We should probably
905 * reconsider this stuff. Most applications actually do not need the
906 * routes, since they usually specify the outgoing interface.
908 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
910 /* XXX: only works in !SCOPEDROUTING case. */
911 if (memcmp(&mltaddr.sin6_addr,
912 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
919 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
920 (struct sockaddr *)&ia->ia_addr,
921 (struct sockaddr *)&mltmask, RTF_UP,
922 (struct rtentry **)0, RT_DEFAULT_FIB);
928 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
930 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
931 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
932 &mltaddr.sin6_addr), if_name(ifp), error));
935 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
938 * Join node information group address.
941 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
943 * The spec does not say anything about delay for this group,
944 * but the same logic should apply.
946 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
948 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
950 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
952 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
953 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
954 &mltaddr.sin6_addr), if_name(ifp), error));
955 /* XXX not very fatal, go on... */
957 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
959 if (V_icmp6_nodeinfo_oldmcprefix &&
960 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
961 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
963 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
964 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
965 &mltaddr.sin6_addr), if_name(ifp), error));
966 /* XXX not very fatal, go on... */
968 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
972 * Join interface-local all-nodes address.
973 * (ff01::1%ifN, and ff01::%ifN/32)
975 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
976 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
977 goto cleanup; /* XXX: should not fail */
978 /* XXX: again, do we really need the route? */
979 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
981 if (memcmp(&mltaddr.sin6_addr,
982 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
989 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
990 (struct sockaddr *)&ia->ia_addr,
991 (struct sockaddr *)&mltmask, RTF_UP,
992 (struct rtentry **)0, RT_DEFAULT_FIB);
998 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
1000 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
1001 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
1002 &mltaddr.sin6_addr), if_name(ifp), error));
1005 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1013 * Update parameters of an IPv6 interface address.
1014 * If necessary, a new entry is created and linked into address chains.
1015 * This function is separated from in6_control().
1018 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1019 struct in6_ifaddr *ia, int flags)
1021 int error = 0, hostIsNew = 0, plen = -1;
1022 struct sockaddr_in6 dst6;
1023 struct in6_addrlifetime *lt;
1024 struct in6_multi *in6m_sol;
1026 char ip6buf[INET6_ADDRSTRLEN];
1028 /* Validate parameters */
1029 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1033 * The destination address for a p2p link must have a family
1034 * of AF_UNSPEC or AF_INET6.
1036 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1037 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1038 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1039 return (EAFNOSUPPORT);
1041 * validate ifra_prefixmask. don't check sin6_family, netmask
1042 * does not carry fields other than sin6_len.
1044 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1047 * Because the IPv6 address architecture is classless, we require
1048 * users to specify a (non 0) prefix length (mask) for a new address.
1049 * We also require the prefix (when specified) mask is valid, and thus
1050 * reject a non-consecutive mask.
1052 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1054 if (ifra->ifra_prefixmask.sin6_len != 0) {
1055 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1056 (u_char *)&ifra->ifra_prefixmask +
1057 ifra->ifra_prefixmask.sin6_len);
1062 * In this case, ia must not be NULL. We just use its prefix
1065 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1068 * If the destination address on a p2p interface is specified,
1069 * and the address is a scoped one, validate/set the scope
1072 dst6 = ifra->ifra_dstaddr;
1073 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1074 (dst6.sin6_family == AF_INET6)) {
1075 struct in6_addr in6_tmp;
1078 in6_tmp = dst6.sin6_addr;
1079 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1080 return (EINVAL); /* XXX: should be impossible */
1082 if (dst6.sin6_scope_id != 0) {
1083 if (dst6.sin6_scope_id != zoneid)
1085 } else /* user omit to specify the ID. */
1086 dst6.sin6_scope_id = zoneid;
1088 /* convert into the internal form */
1089 if (sa6_embedscope(&dst6, 0))
1090 return (EINVAL); /* XXX: should be impossible */
1093 * The destination address can be specified only for a p2p or a
1094 * loopback interface. If specified, the corresponding prefix length
1097 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1098 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1099 /* XXX: noisy message */
1100 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1101 "be specified for a p2p or a loopback IF only\n"));
1105 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1106 "be 128 when dstaddr is specified\n"));
1110 /* lifetime consistency check */
1111 lt = &ifra->ifra_lifetime;
1112 if (lt->ia6t_pltime > lt->ia6t_vltime)
1114 if (lt->ia6t_vltime == 0) {
1116 * the following log might be noisy, but this is a typical
1117 * configuration mistake or a tool's bug.
1120 "in6_update_ifa: valid lifetime is 0 for %s\n",
1121 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1124 return (0); /* there's nothing to do */
1128 * If this is a new address, allocate a new ifaddr and link it
1134 * When in6_update_ifa() is called in a process of a received
1135 * RA, it is called under an interrupt context. So, we should
1136 * call malloc with M_NOWAIT.
1138 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
1142 bzero((caddr_t)ia, sizeof(*ia));
1143 ifa_init(&ia->ia_ifa);
1144 LIST_INIT(&ia->ia6_memberships);
1145 /* Initialize the address and masks, and put time stamp */
1146 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1147 ia->ia_addr.sin6_family = AF_INET6;
1148 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1149 ia->ia6_createtime = time_uptime;
1150 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1152 * XXX: some functions expect that ifa_dstaddr is not
1153 * NULL for p2p interfaces.
1155 ia->ia_ifa.ifa_dstaddr =
1156 (struct sockaddr *)&ia->ia_dstaddr;
1158 ia->ia_ifa.ifa_dstaddr = NULL;
1160 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1162 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1164 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1165 IF_ADDR_WUNLOCK(ifp);
1167 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1169 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1170 LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr),
1172 IN6_IFADDR_WUNLOCK();
1175 /* update timestamp */
1176 ia->ia6_updatetime = time_uptime;
1178 /* set prefix mask */
1179 if (ifra->ifra_prefixmask.sin6_len) {
1181 * We prohibit changing the prefix length of an existing
1183 * + such an operation should be rare in IPv6, and
1184 * + the operation would confuse prefix management.
1186 if (ia->ia_prefixmask.sin6_len &&
1187 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1188 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1189 " existing (%s) address should not be changed\n",
1190 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1194 ia->ia_prefixmask = ifra->ifra_prefixmask;
1195 ia->ia_prefixmask.sin6_family = AF_INET6;
1199 * If a new destination address is specified, scrub the old one and
1200 * install the new destination. Note that the interface must be
1201 * p2p or loopback (see the check above.)
1203 if (dst6.sin6_family == AF_INET6 &&
1204 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1207 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1208 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1209 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1210 "a route to the old destination: %s\n",
1211 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1212 /* proceed anyway... */
1214 ia->ia_flags &= ~IFA_ROUTE;
1215 ia->ia_dstaddr = dst6;
1219 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1220 * to see if the address is deprecated or invalidated, but initialize
1221 * these members for applications.
1223 ia->ia6_lifetime = ifra->ifra_lifetime;
1224 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1225 ia->ia6_lifetime.ia6t_expire =
1226 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1228 ia->ia6_lifetime.ia6t_expire = 0;
1229 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1230 ia->ia6_lifetime.ia6t_preferred =
1231 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1233 ia->ia6_lifetime.ia6t_preferred = 0;
1235 /* reset the interface and routing table appropriately. */
1236 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1240 * configure address flags.
1242 ia->ia6_flags = ifra->ifra_flags;
1244 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1245 * userland, make it deprecated.
1247 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1248 ia->ia6_lifetime.ia6t_pltime = 0;
1249 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1252 * Make the address tentative before joining multicast addresses,
1253 * so that corresponding MLD responses would not have a tentative
1256 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1257 if (hostIsNew && in6if_do_dad(ifp))
1258 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1260 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1261 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1262 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1265 * We are done if we have simply modified an existing address.
1271 * Beyond this point, we should call in6_purgeaddr upon an error,
1272 * not just go to unlink.
1275 /* Join necessary multicast groups. */
1277 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1278 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1284 * Perform DAD, if needed.
1285 * XXX It may be of use, if we can administratively disable DAD.
1287 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1288 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1290 int mindelay, maxdelay;
1293 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1295 * We need to impose a delay before sending an NS
1296 * for DAD. Check if we also needed a delay for the
1297 * corresponding MLD message. If we did, the delay
1298 * should be larger than the MLD delay (this could be
1299 * relaxed a bit, but this simple logic is at least
1301 * XXX: Break data hiding guidelines and look at
1302 * state for the solicited multicast group.
1305 if (in6m_sol != NULL &&
1306 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1307 mindelay = in6m_sol->in6m_timer;
1309 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1310 if (maxdelay - mindelay == 0)
1314 (arc4random() % (maxdelay - mindelay)) +
1318 nd6_dad_start((struct ifaddr *)ia, delay);
1321 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1322 ifa_free(&ia->ia_ifa);
1327 * XXX: if a change of an existing address failed, keep the entry
1331 in6_unlink_ifa(ia, ifp);
1332 ifa_free(&ia->ia_ifa);
1337 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1338 ifa_free(&ia->ia_ifa);
1339 in6_purgeaddr(&ia->ia_ifa);
1344 * Leave multicast groups. Factored out from in6_purgeaddr().
1345 * This entire work should only be done once, for the default FIB.
1348 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1350 struct sockaddr_in6 mltaddr, mltmask;
1351 struct in6_multi_mship *imm;
1353 struct sockaddr_in6 sin6;
1357 * Leave from multicast groups we have joined for the interface.
1359 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1360 LIST_REMOVE(imm, i6mm_chain);
1361 in6_leavegroup(imm);
1365 * Remove the link-local all-nodes address.
1367 bzero(&mltmask, sizeof(mltmask));
1368 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1369 mltmask.sin6_family = AF_INET6;
1370 mltmask.sin6_addr = in6mask32;
1372 bzero(&mltaddr, sizeof(mltaddr));
1373 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1374 mltaddr.sin6_family = AF_INET6;
1375 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1377 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1381 * As for the mltaddr above, proactively prepare the sin6 to avoid
1382 * rtentry un- and re-locking.
1385 bzero(&sin6, sizeof(sin6));
1386 sin6.sin6_len = sizeof(sin6);
1387 sin6.sin6_family = AF_INET6;
1388 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1389 sizeof(sin6.sin6_addr));
1390 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1395 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1396 if (rt != NULL && rt->rt_gateway != NULL &&
1397 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1398 &ia->ia_addr.sin6_addr,
1399 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1401 * If no more IPv6 address exists on this interface then
1402 * remove the multicast address route.
1405 memcpy(&mltaddr.sin6_addr,
1406 &satosin6(rt_key(rt))->sin6_addr,
1407 sizeof(mltaddr.sin6_addr));
1409 error = in6_rtrequest(RTM_DELETE,
1410 (struct sockaddr *)&mltaddr,
1411 (struct sockaddr *)&ia->ia_addr,
1412 (struct sockaddr *)&mltmask, RTF_UP,
1413 (struct rtentry **)0, RT_DEFAULT_FIB);
1415 log(LOG_INFO, "%s: link-local all-nodes "
1416 "multicast address deletion error\n",
1420 * Replace the gateway of the route.
1422 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1431 * Remove the node-local all-nodes address.
1433 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1434 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1437 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1438 if (rt != NULL && rt->rt_gateway != NULL &&
1439 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1440 &ia->ia_addr.sin6_addr,
1441 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1443 * If no more IPv6 address exists on this interface then
1444 * remove the multicast address route.
1447 memcpy(&mltaddr.sin6_addr,
1448 &satosin6(rt_key(rt))->sin6_addr,
1449 sizeof(mltaddr.sin6_addr));
1452 error = in6_rtrequest(RTM_DELETE,
1453 (struct sockaddr *)&mltaddr,
1454 (struct sockaddr *)&ia->ia_addr,
1455 (struct sockaddr *)&mltmask, RTF_UP,
1456 (struct rtentry **)0, RT_DEFAULT_FIB);
1458 log(LOG_INFO, "%s: node-local all-nodes"
1459 "multicast address deletion error\n",
1463 * Replace the gateway of the route.
1465 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1477 in6_purgeaddr(struct ifaddr *ifa)
1479 struct ifnet *ifp = ifa->ifa_ifp;
1480 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1482 struct ifaddr *ifa0;
1485 (*carp_detach_p)(ifa);
1488 * find another IPv6 address as the gateway for the
1489 * link-local and node-local all-nodes multicast
1493 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1494 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1495 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1496 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1503 IF_ADDR_RUNLOCK(ifp);
1506 * Remove the loopback route to the interface address.
1507 * The check for the current setting of "nd6_useloopback"
1510 if (ia->ia_flags & IFA_RTSELF) {
1511 error = ifa_del_loopback_route((struct ifaddr *)ia,
1512 (struct sockaddr *)&ia->ia_addr);
1514 ia->ia_flags &= ~IFA_RTSELF;
1517 /* stop DAD processing */
1520 /* Remove local address entry from lltable. */
1523 /* Leave multicast groups. */
1524 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1529 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1530 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1531 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1532 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1534 log(LOG_INFO, "%s: err=%d, destination address delete "
1535 "failed\n", __func__, error);
1536 ia->ia_flags &= ~IFA_ROUTE;
1539 in6_unlink_ifa(ia, ifp);
1543 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1545 char ip6buf[INET6_ADDRSTRLEN];
1548 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1549 IF_ADDR_WUNLOCK(ifp);
1550 ifa_free(&ia->ia_ifa); /* if_addrhead */
1553 * Defer the release of what might be the last reference to the
1554 * in6_ifaddr so that it can't be freed before the remainder of the
1558 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1559 LIST_REMOVE(ia, ia6_hash);
1560 IN6_IFADDR_WUNLOCK();
1563 * Release the reference to the base prefix. There should be a
1564 * positive reference.
1566 if (ia->ia6_ndpr == NULL) {
1568 "in6_unlink_ifa: autoconf'ed address "
1569 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1571 ia->ia6_ndpr->ndpr_refcnt--;
1572 ia->ia6_ndpr = NULL;
1576 * Also, if the address being removed is autoconf'ed, call
1577 * pfxlist_onlink_check() since the release might affect the status of
1578 * other (detached) addresses.
1580 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1581 pfxlist_onlink_check();
1583 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1587 in6_purgeif(struct ifnet *ifp)
1589 struct ifaddr *ifa, *nifa;
1591 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1592 if (ifa->ifa_addr->sa_family != AF_INET6)
1602 * SIOCGLIFADDR: get first address. (?)
1603 * SIOCGLIFADDR with IFLR_PREFIX:
1604 * get first address that matches the specified prefix.
1605 * SIOCALIFADDR: add the specified address.
1606 * SIOCALIFADDR with IFLR_PREFIX:
1607 * add the specified prefix, filling hostid part from
1608 * the first link-local address. prefixlen must be <= 64.
1609 * SIOCDLIFADDR: delete the specified address.
1610 * SIOCDLIFADDR with IFLR_PREFIX:
1611 * delete the first address that matches the specified prefix.
1613 * EINVAL on invalid parameters
1614 * EADDRNOTAVAIL on prefix match failed/specified address not found
1615 * other values may be returned from in6_ioctl()
1617 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1618 * this is to accomodate address naming scheme other than RFC2374,
1620 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1621 * address encoding scheme. (see figure on page 8)
1624 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1625 struct ifnet *ifp, struct thread *td)
1627 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1629 struct sockaddr *sa;
1632 if (!data || !ifp) {
1633 panic("invalid argument to in6_lifaddr_ioctl");
1639 /* address must be specified on GET with IFLR_PREFIX */
1640 if ((iflr->flags & IFLR_PREFIX) == 0)
1645 /* address must be specified on ADD and DELETE */
1646 sa = (struct sockaddr *)&iflr->addr;
1647 if (sa->sa_family != AF_INET6)
1649 if (sa->sa_len != sizeof(struct sockaddr_in6))
1651 /* XXX need improvement */
1652 sa = (struct sockaddr *)&iflr->dstaddr;
1653 if (sa->sa_family && sa->sa_family != AF_INET6)
1655 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1658 default: /* shouldn't happen */
1660 panic("invalid cmd to in6_lifaddr_ioctl");
1666 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1672 struct in6_aliasreq ifra;
1673 struct in6_addr *hostid = NULL;
1677 if ((iflr->flags & IFLR_PREFIX) != 0) {
1678 struct sockaddr_in6 *sin6;
1681 * hostid is to fill in the hostid part of the
1682 * address. hostid points to the first link-local
1683 * address attached to the interface.
1685 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1687 return EADDRNOTAVAIL;
1688 hostid = IFA_IN6(ifa);
1690 /* prefixlen must be <= 64. */
1691 if (64 < iflr->prefixlen) {
1696 prefixlen = iflr->prefixlen;
1698 /* hostid part must be zero. */
1699 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1700 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1701 sin6->sin6_addr.s6_addr32[3] != 0) {
1707 prefixlen = iflr->prefixlen;
1709 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1710 bzero(&ifra, sizeof(ifra));
1711 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1713 bcopy(&iflr->addr, &ifra.ifra_addr,
1714 ((struct sockaddr *)&iflr->addr)->sa_len);
1716 /* fill in hostid part */
1717 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1718 hostid->s6_addr32[2];
1719 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1720 hostid->s6_addr32[3];
1723 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1724 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1725 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1727 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1728 hostid->s6_addr32[2];
1729 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1730 hostid->s6_addr32[3];
1736 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1737 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1739 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1740 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1745 struct in6_ifaddr *ia;
1746 struct in6_addr mask, candidate, match;
1747 struct sockaddr_in6 *sin6;
1750 bzero(&mask, sizeof(mask));
1751 if (iflr->flags & IFLR_PREFIX) {
1752 /* lookup a prefix rather than address. */
1753 in6_prefixlen2mask(&mask, iflr->prefixlen);
1755 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1756 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1757 match.s6_addr32[0] &= mask.s6_addr32[0];
1758 match.s6_addr32[1] &= mask.s6_addr32[1];
1759 match.s6_addr32[2] &= mask.s6_addr32[2];
1760 match.s6_addr32[3] &= mask.s6_addr32[3];
1762 /* if you set extra bits, that's wrong */
1763 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1768 if (cmd == SIOCGLIFADDR) {
1769 /* on getting an address, take the 1st match */
1772 /* on deleting an address, do exact match */
1773 in6_prefixlen2mask(&mask, 128);
1774 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1775 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1782 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1783 if (ifa->ifa_addr->sa_family != AF_INET6)
1789 * XXX: this is adhoc, but is necessary to allow
1790 * a user to specify fe80::/64 (not /10) for a
1791 * link-local address.
1793 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1794 in6_clearscope(&candidate);
1795 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1796 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1797 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1798 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1799 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1804 IF_ADDR_RUNLOCK(ifp);
1806 return EADDRNOTAVAIL;
1809 if (cmd == SIOCGLIFADDR) {
1812 /* fill in the if_laddrreq structure */
1813 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1814 error = sa6_recoverscope(
1815 (struct sockaddr_in6 *)&iflr->addr);
1821 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1822 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1823 ia->ia_dstaddr.sin6_len);
1824 error = sa6_recoverscope(
1825 (struct sockaddr_in6 *)&iflr->dstaddr);
1831 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1834 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1836 iflr->flags = ia->ia6_flags; /* XXX */
1841 struct in6_aliasreq ifra;
1843 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1844 bzero(&ifra, sizeof(ifra));
1845 bcopy(iflr->iflr_name, ifra.ifra_name,
1846 sizeof(ifra.ifra_name));
1848 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1849 ia->ia_addr.sin6_len);
1850 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1851 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1852 ia->ia_dstaddr.sin6_len);
1854 bzero(&ifra.ifra_dstaddr,
1855 sizeof(ifra.ifra_dstaddr));
1857 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1858 ia->ia_prefixmask.sin6_len);
1860 ifra.ifra_flags = ia->ia6_flags;
1862 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1868 return EOPNOTSUPP; /* just for safety */
1872 * Initialize an interface's IPv6 address and routing table entry.
1875 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1876 struct sockaddr_in6 *sin6, int newhost)
1878 int error = 0, plen, ifacount = 0;
1882 * Give the interface a chance to initialize
1883 * if this is its first address,
1884 * and to validate the address if necessary.
1887 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1888 if (ifa->ifa_addr->sa_family != AF_INET6)
1892 IF_ADDR_RUNLOCK(ifp);
1894 ia->ia_addr = *sin6;
1896 if (ifacount <= 1 && ifp->if_ioctl) {
1897 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1902 ia->ia_ifa.ifa_metric = ifp->if_metric;
1904 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1908 * If a new destination address is specified for a point-to-point
1909 * interface, install a route to the destination as an interface
1911 * XXX: the logic below rejects assigning multiple addresses on a p2p
1912 * interface that share the same destination.
1914 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1915 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1916 ia->ia_dstaddr.sin6_family == AF_INET6) {
1917 int rtflags = RTF_UP | RTF_HOST;
1918 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1921 ia->ia_flags |= IFA_ROUTE;
1923 * Handle the case for ::1 .
1925 if (ifp->if_flags & IFF_LOOPBACK)
1926 ia->ia_flags |= IFA_RTSELF;
1930 * add a loopback route to self
1932 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1933 error = ifa_add_loopback_route((struct ifaddr *)ia,
1934 (struct sockaddr *)&ia->ia_addr);
1936 ia->ia_flags |= IFA_RTSELF;
1939 /* Add local address to lltable, if necessary (ex. on p2p link). */
1941 in6_ifaddloop(&(ia->ia_ifa));
1947 * Find an IPv6 interface link-local address specific to an interface.
1948 * ifaddr is returned referenced.
1951 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1956 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1957 if (ifa->ifa_addr->sa_family != AF_INET6)
1959 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1960 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1967 IF_ADDR_RUNLOCK(ifp);
1969 return ((struct in6_ifaddr *)ifa);
1974 * find the internet address corresponding to a given interface and address.
1975 * ifaddr is returned referenced.
1978 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1983 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1984 if (ifa->ifa_addr->sa_family != AF_INET6)
1986 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1991 IF_ADDR_RUNLOCK(ifp);
1993 return ((struct in6_ifaddr *)ifa);
1997 * Find a link-local scoped address on ifp and return it if any.
2000 in6ifa_llaonifp(struct ifnet *ifp)
2002 struct sockaddr_in6 *sin6;
2005 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2008 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2009 if (ifa->ifa_addr->sa_family != AF_INET6)
2011 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
2012 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
2013 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
2014 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
2017 if_addr_runlock(ifp);
2019 return ((struct in6_ifaddr *)ifa);
2023 * Convert IP6 address to printable (loggable) representation. Caller
2024 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
2026 static char digits[] = "0123456789abcdef";
2028 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
2030 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
2032 const u_int16_t *a = (const u_int16_t *)addr;
2034 int dcolon = 0, zero = 0;
2038 for (i = 0; i < 8; i++) {
2039 if (*(a + i) == 0) {
2044 else if (maxcnt < cnt) {
2055 for (i = 0; i < 8; i++) {
2066 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
2078 d = (const u_char *)a;
2079 /* Try to eliminate leading zeros in printout like in :0001. */
2081 *cp = digits[*d >> 4];
2086 *cp = digits[*d++ & 0xf];
2087 if (zero == 0 || (*cp != '0')) {
2091 *cp = digits[*d >> 4];
2092 if (zero == 0 || (*cp != '0')) {
2096 *cp++ = digits[*d & 0xf];
2105 in6_localaddr(struct in6_addr *in6)
2107 struct in6_ifaddr *ia;
2109 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2113 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2114 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2115 &ia->ia_prefixmask.sin6_addr)) {
2116 IN6_IFADDR_RUNLOCK();
2120 IN6_IFADDR_RUNLOCK();
2126 * Return 1 if an internet address is for the local host and configured
2127 * on one of its interfaces.
2130 in6_localip(struct in6_addr *in6)
2132 struct in6_ifaddr *ia;
2135 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
2136 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2137 IN6_IFADDR_RUNLOCK();
2141 IN6_IFADDR_RUNLOCK();
2146 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2148 struct in6_ifaddr *ia;
2151 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
2152 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
2153 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
2154 IN6_IFADDR_RUNLOCK();
2155 return (1); /* true */
2160 IN6_IFADDR_RUNLOCK();
2162 return (0); /* false */
2166 * return length of part which dst and src are equal
2170 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2173 u_char *s = (u_char *)src, *d = (u_char *)dst;
2174 u_char *lim = s + 16, r;
2177 if ((r = (*d++ ^ *s++)) != 0) {
2188 /* XXX: to be scope conscious */
2190 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2192 int bytelen, bitlen;
2195 if (0 > len || len > 128) {
2196 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2204 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2207 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2208 p2->s6_addr[bytelen] >> (8 - bitlen))
2215 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2217 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2218 int bytelen, bitlen, i;
2221 if (0 > len || len > 128) {
2222 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2227 bzero(maskp, sizeof(*maskp));
2230 for (i = 0; i < bytelen; i++)
2231 maskp->s6_addr[i] = 0xff;
2233 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2237 * return the best address out of the same scope. if no address was
2238 * found, return the first valid address from designated IF.
2241 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2243 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2245 struct in6_ifaddr *besta = 0;
2246 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2248 dep[0] = dep[1] = NULL;
2251 * We first look for addresses in the same scope.
2252 * If there is one, return it.
2253 * If two or more, return one which matches the dst longest.
2254 * If none, return one of global addresses assigned other ifs.
2257 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2258 if (ifa->ifa_addr->sa_family != AF_INET6)
2260 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2261 continue; /* XXX: is there any case to allow anycast? */
2262 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2263 continue; /* don't use this interface */
2264 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2266 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2267 if (V_ip6_use_deprecated)
2268 dep[0] = (struct in6_ifaddr *)ifa;
2272 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2274 * call in6_matchlen() as few as possible
2278 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2279 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2282 besta = (struct in6_ifaddr *)ifa;
2285 besta = (struct in6_ifaddr *)ifa;
2289 ifa_ref(&besta->ia_ifa);
2290 IF_ADDR_RUNLOCK(ifp);
2294 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2295 if (ifa->ifa_addr->sa_family != AF_INET6)
2297 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2298 continue; /* XXX: is there any case to allow anycast? */
2299 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2300 continue; /* don't use this interface */
2301 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2303 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2304 if (V_ip6_use_deprecated)
2305 dep[1] = (struct in6_ifaddr *)ifa;
2311 IF_ADDR_RUNLOCK(ifp);
2312 return (struct in6_ifaddr *)ifa;
2315 /* use the last-resort values, that are, deprecated addresses */
2317 ifa_ref((struct ifaddr *)dep[0]);
2318 IF_ADDR_RUNLOCK(ifp);
2322 ifa_ref((struct ifaddr *)dep[1]);
2323 IF_ADDR_RUNLOCK(ifp);
2327 IF_ADDR_RUNLOCK(ifp);
2332 * perform DAD when interface becomes IFF_UP.
2335 in6_if_up(struct ifnet *ifp)
2338 struct in6_ifaddr *ia;
2341 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2342 if (ifa->ifa_addr->sa_family != AF_INET6)
2344 ia = (struct in6_ifaddr *)ifa;
2345 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2347 * The TENTATIVE flag was likely set by hand
2348 * beforehand, implicitly indicating the need for DAD.
2349 * We may be able to skip the random delay in this
2350 * case, but we impose delays just in case.
2353 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2356 IF_ADDR_RUNLOCK(ifp);
2359 * special cases, like 6to4, are handled in in6_ifattach
2361 in6_ifattach(ifp, NULL);
2365 in6if_do_dad(struct ifnet *ifp)
2367 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2370 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
2371 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
2374 switch (ifp->if_type) {
2380 * These interfaces do not have the IFF_LOOPBACK flag,
2381 * but loop packets back. We do not have to do DAD on such
2382 * interfaces. We should even omit it, because loop-backed
2383 * NS would confuse the DAD procedure.
2388 * Our DAD routine requires the interface up and running.
2389 * However, some interfaces can be up before the RUNNING
2390 * status. Additionaly, users may try to assign addresses
2391 * before the interface becomes up (or running).
2392 * We simply skip DAD in such a case as a work around.
2393 * XXX: we should rather mark "tentative" on such addresses,
2394 * and do DAD after the interface becomes ready.
2396 if (!((ifp->if_flags & IFF_UP) &&
2397 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2405 * Calculate max IPv6 MTU through all the interfaces and store it
2411 unsigned long maxmtu = 0;
2414 IFNET_RLOCK_NOSLEEP();
2415 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2416 /* this function can be called during ifnet initialization */
2417 if (!ifp->if_afdata[AF_INET6])
2419 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2420 IN6_LINKMTU(ifp) > maxmtu)
2421 maxmtu = IN6_LINKMTU(ifp);
2423 IFNET_RUNLOCK_NOSLEEP();
2424 if (maxmtu) /* update only when maxmtu is positive */
2425 V_in6_maxmtu = maxmtu;
2429 * Provide the length of interface identifiers to be used for the link attached
2430 * to the given interface. The length should be defined in "IPv6 over
2431 * xxx-link" document. Note that address architecture might also define
2432 * the length for a particular set of address prefixes, regardless of the
2433 * link type. As clarified in rfc2462bis, those two definitions should be
2434 * consistent, and those really are as of August 2004.
2437 in6_if2idlen(struct ifnet *ifp)
2439 switch (ifp->if_type) {
2440 case IFT_ETHER: /* RFC2464 */
2441 #ifdef IFT_PROPVIRTUAL
2442 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2445 case IFT_L2VLAN: /* ditto */
2447 #ifdef IFT_IEEE80211
2448 case IFT_IEEE80211: /* ditto */
2451 case IFT_MIP: /* ditto */
2453 case IFT_INFINIBAND:
2455 case IFT_FDDI: /* RFC2467 */
2457 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2459 case IFT_PPP: /* RFC2472 */
2461 case IFT_ARCNET: /* RFC2497 */
2463 case IFT_FRELAY: /* RFC2590 */
2465 case IFT_IEEE1394: /* RFC3146 */
2468 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2470 return (64); /* XXX: is this really correct? */
2473 * Unknown link type:
2474 * It might be controversial to use the today's common constant
2475 * of 64 for these cases unconditionally. For full compliance,
2476 * we should return an error in this case. On the other hand,
2477 * if we simply miss the standard for the link type or a new
2478 * standard is defined for a new link type, the IFID length
2479 * is very likely to be the common constant. As a compromise,
2480 * we always use the constant, but make an explicit notice
2481 * indicating the "unknown" case.
2483 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2488 #include <sys/sysctl.h>
2490 struct in6_llentry {
2491 struct llentry base;
2492 struct sockaddr_in6 l3_addr6;
2496 * Deletes an address from the address table.
2497 * This function is called by the timer functions
2498 * such as arptimer() and nd6_llinfo_timer(), and
2499 * the caller does the locking.
2502 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2505 LLE_LOCK_DESTROY(lle);
2506 free(lle, M_LLTABLE);
2509 static struct llentry *
2510 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2512 struct in6_llentry *lle;
2514 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2515 if (lle == NULL) /* NB: caller generates msg */
2518 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2519 lle->base.lle_refcnt = 1;
2520 lle->base.lle_free = in6_lltable_free;
2521 LLE_LOCK_INIT(&lle->base);
2522 callout_init(&lle->base.ln_timer_ch, 1);
2524 return (&lle->base);
2528 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2529 const struct sockaddr *mask, u_int flags)
2531 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2532 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2533 struct llentry *lle, *next;
2537 * (flags & LLE_STATIC) means deleting all entries
2538 * including static ND6 entries.
2540 IF_AFDATA_WLOCK(llt->llt_ifp);
2541 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2542 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2543 if (IN6_ARE_MASKED_ADDR_EQUAL(
2544 &satosin6(L3_ADDR(lle))->sin6_addr,
2545 &pfx->sin6_addr, &msk->sin6_addr) &&
2546 ((flags & LLE_STATIC) ||
2547 !(lle->la_flags & LLE_STATIC))) {
2549 if (callout_stop(&lle->la_timer))
2555 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2559 in6_lltable_rtcheck(struct ifnet *ifp,
2561 const struct sockaddr *l3addr)
2564 char ip6buf[INET6_ADDRSTRLEN];
2566 KASSERT(l3addr->sa_family == AF_INET6,
2567 ("sin_family %d", l3addr->sa_family));
2569 /* Our local addresses are always only installed on the default FIB. */
2570 /* XXX rtalloc1 should take a const param */
2571 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2573 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2576 * Create an ND6 cache for an IPv6 neighbor
2577 * that is not covered by our own prefix.
2579 /* XXX ifaof_ifpforaddr should take a const param */
2580 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2587 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2588 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2597 static struct llentry *
2598 in6_lltable_lookup(struct lltable *llt, u_int flags,
2599 const struct sockaddr *l3addr)
2601 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2602 struct ifnet *ifp = llt->llt_ifp;
2603 struct llentry *lle;
2604 struct llentries *lleh;
2607 IF_AFDATA_LOCK_ASSERT(ifp);
2608 KASSERT(l3addr->sa_family == AF_INET6,
2609 ("sin_family %d", l3addr->sa_family));
2611 hashkey = sin6->sin6_addr.s6_addr32[3];
2612 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2613 LIST_FOREACH(lle, lleh, lle_next) {
2614 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2615 if (lle->la_flags & LLE_DELETED)
2617 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2618 sizeof(struct in6_addr)) == 0)
2623 if (!(flags & LLE_CREATE))
2625 IF_AFDATA_WLOCK_ASSERT(ifp);
2627 * A route that covers the given address must have
2628 * been installed 1st because we are doing a resolution,
2631 if (!(flags & LLE_IFADDR) &&
2632 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2635 lle = in6_lltable_new(l3addr, flags);
2637 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2640 lle->la_flags = flags & ~LLE_CREATE;
2641 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2642 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2643 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2647 lle->lle_head = lleh;
2648 lle->la_flags |= LLE_LINKED;
2649 LIST_INSERT_HEAD(lleh, lle, lle_next);
2650 } else if (flags & LLE_DELETE) {
2651 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2653 lle->la_flags |= LLE_DELETED;
2655 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2657 if ((lle->la_flags &
2658 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2665 if (LLE_IS_VALID(lle)) {
2666 if (flags & LLE_EXCLUSIVE)
2675 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2677 struct ifnet *ifp = llt->llt_ifp;
2678 struct llentry *lle;
2681 struct rt_msghdr rtm;
2682 struct sockaddr_in6 sin6;
2684 * ndp.c assumes that sdl is word aligned
2689 struct sockaddr_dl sdl;
2693 if (ifp->if_flags & IFF_LOOPBACK)
2696 LLTABLE_LOCK_ASSERT();
2699 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2700 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2701 struct sockaddr_dl *sdl;
2703 /* skip deleted or invalid entries */
2704 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2706 /* Skip if jailed and not a valid IP of the prison. */
2707 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2710 * produce a msg made of:
2712 * struct sockaddr_in6 (IPv6)
2713 * struct sockaddr_dl;
2715 bzero(&ndpc, sizeof(ndpc));
2716 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2717 ndpc.rtm.rtm_version = RTM_VERSION;
2718 ndpc.rtm.rtm_type = RTM_GET;
2719 ndpc.rtm.rtm_flags = RTF_UP;
2720 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2721 ndpc.sin6.sin6_family = AF_INET6;
2722 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2723 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2724 if (V_deembed_scopeid)
2725 sa6_recoverscope(&ndpc.sin6);
2728 if (lle->la_flags & LLE_PUB)
2729 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2732 sdl->sdl_family = AF_LINK;
2733 sdl->sdl_len = sizeof(*sdl);
2734 sdl->sdl_alen = ifp->if_addrlen;
2735 sdl->sdl_index = ifp->if_index;
2736 sdl->sdl_type = ifp->if_type;
2737 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2738 ndpc.rtm.rtm_rmx.rmx_expire =
2739 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2740 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2741 if (lle->la_flags & LLE_STATIC)
2742 ndpc.rtm.rtm_flags |= RTF_STATIC;
2743 ndpc.rtm.rtm_index = ifp->if_index;
2744 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2753 in6_domifattach(struct ifnet *ifp)
2755 struct in6_ifextra *ext;
2757 /* There are not IPv6-capable interfaces. */
2758 switch (ifp->if_type) {
2764 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2765 bzero(ext, sizeof(*ext));
2767 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2768 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2769 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2770 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2772 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2773 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2775 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2776 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2778 ext->nd_ifinfo = nd6_ifattach(ifp);
2779 ext->scope6_id = scope6_ifattach(ifp);
2780 ext->lltable = lltable_init(ifp, AF_INET6);
2781 if (ext->lltable != NULL) {
2782 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2783 ext->lltable->llt_lookup = in6_lltable_lookup;
2784 ext->lltable->llt_dump = in6_lltable_dump;
2787 ext->mld_ifinfo = mld_domifattach(ifp);
2793 in6_domifdetach(struct ifnet *ifp, void *aux)
2795 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2797 mld_domifdetach(ifp);
2798 scope6_ifdetach(ext->scope6_id);
2799 nd6_ifdetach(ext->nd_ifinfo);
2800 lltable_free(ext->lltable);
2801 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2802 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2803 free(ext->in6_ifstat, M_IFADDR);
2804 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2805 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2806 free(ext->icmp6_ifstat, M_IFADDR);
2807 free(ext, M_IFADDR);
2811 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2812 * v4 mapped addr or v4 compat addr
2815 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2818 bzero(sin, sizeof(*sin));
2819 sin->sin_len = sizeof(struct sockaddr_in);
2820 sin->sin_family = AF_INET;
2821 sin->sin_port = sin6->sin6_port;
2822 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2825 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2827 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2829 bzero(sin6, sizeof(*sin6));
2830 sin6->sin6_len = sizeof(struct sockaddr_in6);
2831 sin6->sin6_family = AF_INET6;
2832 sin6->sin6_port = sin->sin_port;
2833 sin6->sin6_addr.s6_addr32[0] = 0;
2834 sin6->sin6_addr.s6_addr32[1] = 0;
2835 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2836 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2839 /* Convert sockaddr_in6 into sockaddr_in. */
2841 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2843 struct sockaddr_in *sin_p;
2844 struct sockaddr_in6 sin6;
2847 * Save original sockaddr_in6 addr and convert it
2850 sin6 = *(struct sockaddr_in6 *)nam;
2851 sin_p = (struct sockaddr_in *)nam;
2852 in6_sin6_2_sin(sin_p, &sin6);
2855 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2857 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2859 struct sockaddr_in *sin_p;
2860 struct sockaddr_in6 *sin6_p;
2862 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2863 sin_p = (struct sockaddr_in *)*nam;
2864 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2865 free(*nam, M_SONAME);
2866 *nam = (struct sockaddr *)sin6_p;