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>
99 #include <netinet/ip6.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet6/nd6.h>
102 #include <netinet6/mld6_var.h>
103 #include <netinet6/ip6_mroute.h>
104 #include <netinet6/in6_ifattach.h>
105 #include <netinet6/scope6_var.h>
106 #include <netinet6/in6_pcb.h>
109 * Definitions of some costant IP6 addresses.
111 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
112 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
113 const struct in6_addr in6addr_nodelocal_allnodes =
114 IN6ADDR_NODELOCAL_ALLNODES_INIT;
115 const struct in6_addr in6addr_linklocal_allnodes =
116 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
117 const struct in6_addr in6addr_linklocal_allrouters =
118 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
119 const struct in6_addr in6addr_linklocal_allv2routers =
120 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_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 =
129 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
131 static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
132 struct ifnet *, struct thread *));
133 static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *,
134 struct sockaddr_in6 *, int));
135 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
137 int (*faithprefix_p)(struct in6_addr *);
139 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
140 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
143 in6_ifaddloop(struct ifaddr *ifa)
145 struct sockaddr_dl gateway;
146 struct sockaddr_in6 mask, addr;
148 struct in6_ifaddr *ia;
155 ifa->ifa_rtrequest = nd6_rtrequest;
156 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
157 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
158 IF_AFDATA_UNLOCK(ifp);
160 ln->la_expire = 0; /* for IPv6 this means permanent */
161 ln->ln_state = ND6_LLINFO_REACHABLE;
163 * initialize for rtmsg generation
165 bzero(&gateway, sizeof(gateway));
166 gateway.sdl_len = sizeof(gateway);
167 gateway.sdl_family = AF_LINK;
168 gateway.sdl_nlen = 0;
169 gateway.sdl_alen = 6;
170 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
171 sizeof(ln->ll_addr));
175 bzero(&rt, sizeof(rt));
176 rt.rt_gateway = (struct sockaddr *)&gateway;
177 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
178 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
179 rt_mask(&rt) = (struct sockaddr *)&mask;
180 rt_key(&rt) = (struct sockaddr *)&addr;
181 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
182 /* Announce arrival of local address to all FIBs. */
183 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
187 in6_ifremloop(struct ifaddr *ifa)
189 struct sockaddr_dl gateway;
190 struct sockaddr_in6 mask, addr;
192 struct in6_ifaddr *ia;
198 lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR),
199 (struct sockaddr *)&ia->ia_addr);
200 IF_AFDATA_UNLOCK(ifp);
203 * initialize for rtmsg generation
205 bzero(&gateway, sizeof(gateway));
206 gateway.sdl_len = sizeof(gateway);
207 gateway.sdl_family = AF_LINK;
208 gateway.sdl_nlen = 0;
209 gateway.sdl_alen = ifp->if_addrlen;
210 bzero(&rt0, sizeof(rt0));
211 rt0.rt_gateway = (struct sockaddr *)&gateway;
212 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
213 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
214 rt_mask(&rt0) = (struct sockaddr *)&mask;
215 rt_key(&rt0) = (struct sockaddr *)&addr;
216 rt0.rt_flags = RTF_HOST | RTF_STATIC;
217 /* Announce removal of local address to all FIBs. */
218 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
222 in6_mask2len(struct in6_addr *mask, u_char *lim0)
225 u_char *lim = lim0, *p;
227 /* ignore the scope_id part */
228 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
229 lim = (u_char *)mask + sizeof(*mask);
230 for (p = (u_char *)mask; p < lim; x++, p++) {
236 for (y = 0; y < 8; y++) {
237 if ((*p & (0x80 >> y)) == 0)
243 * when the limit pointer is given, do a stricter check on the
247 if (y != 0 && (*p & (0x00ff >> y)) != 0)
249 for (p = p + 1; p < lim; p++)
257 #ifdef COMPAT_FREEBSD32
258 struct in6_ndifreq32 {
259 char ifname[IFNAMSIZ];
262 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
266 in6_control(struct socket *so, u_long cmd, caddr_t data,
267 struct ifnet *ifp, struct thread *td)
269 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
270 struct in6_ifaddr *ia = NULL;
271 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
272 struct sockaddr_in6 *sa6;
276 case SIOCGETSGCNT_IN6:
277 case SIOCGETMIFCNT_IN6:
279 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
280 * We cannot see how that would be needed, so do not adjust the
281 * KPI blindly; more likely should clean up the IPv4 variant.
283 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
287 case SIOCAADDRCTL_POLICY:
288 case SIOCDADDRCTL_POLICY:
290 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
294 return (in6_src_ioctl(cmd, data));
301 case SIOCSNDFLUSH_IN6:
302 case SIOCSPFXFLUSH_IN6:
303 case SIOCSRTRFLUSH_IN6:
304 case SIOCSDEFIFACE_IN6:
305 case SIOCSIFINFO_FLAGS:
306 case SIOCSIFINFO_IN6:
308 error = priv_check(td, PRIV_NETINET_ND6);
313 case OSIOCGIFINFO_IN6:
314 case SIOCGIFINFO_IN6:
317 case SIOCGNBRINFO_IN6:
318 case SIOCGDEFIFACE_IN6:
319 return (nd6_ioctl(cmd, data, ifp));
321 #ifdef COMPAT_FREEBSD32
322 case SIOCGDEFIFACE32_IN6:
324 struct in6_ndifreq ndif;
325 struct in6_ndifreq32 *ndif32;
327 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
331 ndif32 = (struct in6_ndifreq32 *)data;
332 ndif32->ifindex = ndif.ifindex;
339 case SIOCSIFPREFIX_IN6:
340 case SIOCDIFPREFIX_IN6:
341 case SIOCAIFPREFIX_IN6:
342 case SIOCCIFPREFIX_IN6:
343 case SIOCSGIFPREFIX_IN6:
344 case SIOCGIFPREFIX_IN6:
346 "prefix ioctls are now invalidated. "
347 "please use ifconfig.\n");
354 error = priv_check(td, PRIV_NETINET_SCOPE6);
358 return (scope6_set(ifp,
359 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
361 return (scope6_get(ifp,
362 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
364 return (scope6_get_default((struct scope6_id *)
365 ifr->ifr_ifru.ifru_scope_id));
371 error = priv_check(td, PRIV_NET_ADDIFADDR);
375 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
379 error = priv_check(td, PRIV_NET_DELIFADDR);
385 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
389 * Find address for this interface, if it exists.
391 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
392 * only, and used the first interface address as the target of other
393 * operations (without checking ifra_addr). This was because netinet
394 * code/API assumed at most 1 interface address per interface.
395 * Since IPv6 allows a node to assign multiple addresses
396 * on a single interface, we almost always look and check the
397 * presence of ifra_addr, and reject invalid ones here.
398 * It also decreases duplicated code among SIOC*_IN6 operations.
401 case SIOCAIFADDR_IN6:
402 case SIOCSIFPHYADDR_IN6:
403 sa6 = &ifra->ifra_addr;
405 case SIOCSIFADDR_IN6:
406 case SIOCGIFADDR_IN6:
407 case SIOCSIFDSTADDR_IN6:
408 case SIOCSIFNETMASK_IN6:
409 case SIOCGIFDSTADDR_IN6:
410 case SIOCGIFNETMASK_IN6:
411 case SIOCDIFADDR_IN6:
412 case SIOCGIFPSRCADDR_IN6:
413 case SIOCGIFPDSTADDR_IN6:
414 case SIOCGIFAFLAG_IN6:
415 case SIOCSNDFLUSH_IN6:
416 case SIOCSPFXFLUSH_IN6:
417 case SIOCSRTRFLUSH_IN6:
418 case SIOCGIFALIFETIME_IN6:
419 case SIOCSIFALIFETIME_IN6:
420 case SIOCGIFSTAT_IN6:
421 case SIOCGIFSTAT_ICMP6:
422 sa6 = &ifr->ifr_addr;
428 if (sa6 && sa6->sin6_family == AF_INET6) {
429 if (sa6->sin6_scope_id != 0)
430 error = sa6_embedscope(sa6, 0);
432 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
435 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
436 &sa6->sin6_addr)) != 0)
438 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
443 case SIOCSIFADDR_IN6:
444 case SIOCSIFDSTADDR_IN6:
445 case SIOCSIFNETMASK_IN6:
447 * Since IPv6 allows a node to assign multiple addresses
448 * on a single interface, SIOCSIFxxx ioctls are deprecated.
450 /* we decided to obsolete this command (20000704) */
454 case SIOCDIFADDR_IN6:
456 * for IPv4, we look for existing in_ifaddr here to allow
457 * "ifconfig if0 delete" to remove the first IPv4 address on
458 * the interface. For IPv6, as the spec allows multiple
459 * interface address from the day one, we consider "remove the
460 * first one" semantics to be not preferable.
463 error = EADDRNOTAVAIL;
467 case SIOCAIFADDR_IN6:
469 * We always require users to specify a valid IPv6 address for
470 * the corresponding operation.
472 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
473 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
474 error = EAFNOSUPPORT;
479 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
480 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
486 case SIOCGIFADDR_IN6:
487 /* This interface is basically deprecated. use SIOCGIFCONF. */
489 case SIOCGIFAFLAG_IN6:
490 case SIOCGIFNETMASK_IN6:
491 case SIOCGIFDSTADDR_IN6:
492 case SIOCGIFALIFETIME_IN6:
493 /* must think again about its semantics */
495 error = EADDRNOTAVAIL;
500 case SIOCSIFALIFETIME_IN6:
502 struct in6_addrlifetime *lt;
505 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
510 error = EADDRNOTAVAIL;
513 /* sanity for overflow - beware unsigned */
514 lt = &ifr->ifr_ifru.ifru_lifetime;
515 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
516 lt->ia6t_vltime + time_second < time_second) {
520 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
521 lt->ia6t_pltime + time_second < time_second) {
530 case SIOCGIFADDR_IN6:
531 ifr->ifr_addr = ia->ia_addr;
532 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
536 case SIOCGIFDSTADDR_IN6:
537 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
542 * XXX: should we check if ifa_dstaddr is NULL and return
545 ifr->ifr_dstaddr = ia->ia_dstaddr;
546 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
550 case SIOCGIFNETMASK_IN6:
551 ifr->ifr_addr = ia->ia_prefixmask;
554 case SIOCGIFAFLAG_IN6:
555 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
558 case SIOCGIFSTAT_IN6:
563 bzero(&ifr->ifr_ifru.ifru_stat,
564 sizeof(ifr->ifr_ifru.ifru_stat));
565 ifr->ifr_ifru.ifru_stat =
566 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
569 case SIOCGIFSTAT_ICMP6:
574 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
575 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
576 ifr->ifr_ifru.ifru_icmp6stat =
577 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
580 case SIOCGIFALIFETIME_IN6:
581 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
582 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
584 struct in6_addrlifetime *retlt =
585 &ifr->ifr_ifru.ifru_lifetime;
588 * XXX: adjust expiration time assuming time_t is
592 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
593 if (ia->ia6_lifetime.ia6t_vltime <
594 maxexpire - ia->ia6_updatetime) {
595 retlt->ia6t_expire = ia->ia6_updatetime +
596 ia->ia6_lifetime.ia6t_vltime;
598 retlt->ia6t_expire = maxexpire;
600 if (ia->ia6_lifetime.ia6t_pltime != 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_pltime <
612 maxexpire - ia->ia6_updatetime) {
613 retlt->ia6t_preferred = ia->ia6_updatetime +
614 ia->ia6_lifetime.ia6t_pltime;
616 retlt->ia6t_preferred = maxexpire;
620 case SIOCSIFALIFETIME_IN6:
621 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
623 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
624 ia->ia6_lifetime.ia6t_expire =
625 time_second + ia->ia6_lifetime.ia6t_vltime;
627 ia->ia6_lifetime.ia6t_expire = 0;
628 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
629 ia->ia6_lifetime.ia6t_preferred =
630 time_second + ia->ia6_lifetime.ia6t_pltime;
632 ia->ia6_lifetime.ia6t_preferred = 0;
635 case SIOCAIFADDR_IN6:
638 struct nd_prefixctl pr0;
639 struct nd_prefix *pr;
642 * first, make or update the interface address structure,
643 * and link it to the list.
645 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
648 ifa_free(&ia->ia_ifa);
649 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
652 * this can happen when the user specify the 0 valid
659 * then, make the prefix on-link on the interface.
660 * XXX: we'd rather create the prefix before the address, but
661 * we need at least one address to install the corresponding
662 * interface route, so we configure the address first.
666 * convert mask to prefix length (prefixmask has already
667 * been validated in in6_update_ifa().
669 bzero(&pr0, sizeof(pr0));
671 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
673 if (pr0.ndpr_plen == 128) {
674 break; /* we don't need to install a host route. */
676 pr0.ndpr_prefix = ifra->ifra_addr;
677 /* apply the mask for safety. */
678 for (i = 0; i < 4; i++) {
679 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
680 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
683 * XXX: since we don't have an API to set prefix (not address)
684 * lifetimes, we just use the same lifetimes as addresses.
685 * The (temporarily) installed lifetimes can be overridden by
686 * later advertised RAs (when accept_rtadv is non 0), which is
687 * an intended behavior.
689 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
691 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
692 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
693 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
695 /* add the prefix if not yet. */
696 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
698 * nd6_prelist_add will install the corresponding
701 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
704 log(LOG_ERR, "nd6_prelist_add succeeded but "
711 /* relate the address to the prefix */
712 if (ia->ia6_ndpr == NULL) {
717 * If this is the first autoconf address from the
718 * prefix, create a temporary address as well
721 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
722 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
724 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
725 log(LOG_NOTICE, "in6_control: failed "
726 "to create a temporary address, "
733 * this might affect the status of autoconfigured addresses,
734 * that is, this address might make other addresses detached.
736 pfxlist_onlink_check();
737 if (error == 0 && ia) {
738 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
740 * Try to clear the flag when a new
741 * IPv6 address is added onto an
742 * IFDISABLED interface and it
745 struct in6_ndireq nd;
747 memset(&nd, 0, sizeof(nd));
748 nd.ndi.flags = ND_IFINFO(ifp)->flags;
749 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
750 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
751 (caddr_t)&nd, ifp) < 0)
752 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
753 "SIOCSIFINFO_FLAGS for -ifdisabled "
756 * Ignore failure of clearing the flag
757 * intentionally. The failure means
758 * address duplication was detected.
761 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
766 case SIOCDIFADDR_IN6:
768 struct nd_prefix *pr;
771 * If the address being deleted is the only one that owns
772 * the corresponding prefix, expire the prefix as well.
773 * XXX: theoretically, we don't have to worry about such
774 * relationship, since we separate the address management
775 * and the prefix management. We do this, however, to provide
776 * as much backward compatibility as possible in terms of
777 * the ioctl operation.
778 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
781 in6_purgeaddr(&ia->ia_ifa);
782 if (pr && pr->ndpr_refcnt == 0)
784 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
789 if (ifp == NULL || ifp->if_ioctl == 0) {
793 error = (*ifp->if_ioctl)(ifp, cmd, data);
800 ifa_free(&ia->ia_ifa);
806 * Join necessary multicast groups. Factored out from in6_update_ifa().
807 * This entire work should only be done once, for the default FIB.
810 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
811 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
813 char ip6buf[INET6_ADDRSTRLEN];
814 struct sockaddr_in6 mltaddr, mltmask;
815 struct in6_addr llsol;
816 struct in6_multi_mship *imm;
820 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
822 /* Join solicited multicast addr for new host id. */
823 bzero(&llsol, sizeof(struct in6_addr));
824 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
825 llsol.s6_addr32[1] = 0;
826 llsol.s6_addr32[2] = htonl(1);
827 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
828 llsol.s6_addr8[12] = 0xff;
829 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
830 /* XXX: should not happen */
831 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
835 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
837 * We need a random delay for DAD on the address being
838 * configured. It also means delaying transmission of the
839 * corresponding MLD report to avoid report collision.
840 * [RFC 4861, Section 6.3.7]
842 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
844 imm = in6_joingroup(ifp, &llsol, &error, delay);
846 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
847 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
848 if_name(ifp), error));
851 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
852 *in6m_sol = imm->i6mm_maddr;
854 bzero(&mltmask, sizeof(mltmask));
855 mltmask.sin6_len = sizeof(struct sockaddr_in6);
856 mltmask.sin6_family = AF_INET6;
857 mltmask.sin6_addr = in6mask32;
858 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
861 * Join link-local all-nodes address.
863 bzero(&mltaddr, sizeof(mltaddr));
864 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
865 mltaddr.sin6_family = AF_INET6;
866 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
867 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
868 goto cleanup; /* XXX: should not fail */
871 * XXX: do we really need this automatic routes? We should probably
872 * reconsider this stuff. Most applications actually do not need the
873 * routes, since they usually specify the outgoing interface.
875 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
877 /* XXX: only works in !SCOPEDROUTING case. */
878 if (memcmp(&mltaddr.sin6_addr,
879 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
886 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
887 (struct sockaddr *)&ia->ia_addr,
888 (struct sockaddr *)&mltmask, RTF_UP,
889 (struct rtentry **)0, RT_DEFAULT_FIB);
895 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
897 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
898 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
899 &mltaddr.sin6_addr), if_name(ifp), error));
902 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
905 * Join node information group address.
908 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
910 * The spec does not say anything about delay for this group,
911 * but the same logic should apply.
913 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
915 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
917 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
919 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
920 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
921 &mltaddr.sin6_addr), if_name(ifp), error));
922 /* XXX not very fatal, go on... */
924 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
928 * Join interface-local all-nodes address.
929 * (ff01::1%ifN, and ff01::%ifN/32)
931 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
932 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
933 goto cleanup; /* XXX: should not fail */
934 /* XXX: again, do we really need the route? */
935 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
937 if (memcmp(&mltaddr.sin6_addr,
938 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
945 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
946 (struct sockaddr *)&ia->ia_addr,
947 (struct sockaddr *)&mltmask, RTF_UP,
948 (struct rtentry **)0, RT_DEFAULT_FIB);
954 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
956 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
957 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
958 &mltaddr.sin6_addr), if_name(ifp), error));
961 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
969 * Update parameters of an IPv6 interface address.
970 * If necessary, a new entry is created and linked into address chains.
971 * This function is separated from in6_control().
972 * XXX: should this be performed under splnet()?
975 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
976 struct in6_ifaddr *ia, int flags)
978 int error = 0, hostIsNew = 0, plen = -1;
979 struct sockaddr_in6 dst6;
980 struct in6_addrlifetime *lt;
981 struct in6_multi *in6m_sol;
983 char ip6buf[INET6_ADDRSTRLEN];
985 /* Validate parameters */
986 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
990 * The destination address for a p2p link must have a family
991 * of AF_UNSPEC or AF_INET6.
993 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
994 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
995 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
996 return (EAFNOSUPPORT);
998 * validate ifra_prefixmask. don't check sin6_family, netmask
999 * does not carry fields other than sin6_len.
1001 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1004 * Because the IPv6 address architecture is classless, we require
1005 * users to specify a (non 0) prefix length (mask) for a new address.
1006 * We also require the prefix (when specified) mask is valid, and thus
1007 * reject a non-consecutive mask.
1009 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1011 if (ifra->ifra_prefixmask.sin6_len != 0) {
1012 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1013 (u_char *)&ifra->ifra_prefixmask +
1014 ifra->ifra_prefixmask.sin6_len);
1019 * In this case, ia must not be NULL. We just use its prefix
1022 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1025 * If the destination address on a p2p interface is specified,
1026 * and the address is a scoped one, validate/set the scope
1029 dst6 = ifra->ifra_dstaddr;
1030 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1031 (dst6.sin6_family == AF_INET6)) {
1032 struct in6_addr in6_tmp;
1035 in6_tmp = dst6.sin6_addr;
1036 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1037 return (EINVAL); /* XXX: should be impossible */
1039 if (dst6.sin6_scope_id != 0) {
1040 if (dst6.sin6_scope_id != zoneid)
1042 } else /* user omit to specify the ID. */
1043 dst6.sin6_scope_id = zoneid;
1045 /* convert into the internal form */
1046 if (sa6_embedscope(&dst6, 0))
1047 return (EINVAL); /* XXX: should be impossible */
1050 * The destination address can be specified only for a p2p or a
1051 * loopback interface. If specified, the corresponding prefix length
1054 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1055 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1056 /* XXX: noisy message */
1057 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1058 "be specified for a p2p or a loopback IF only\n"));
1062 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1063 "be 128 when dstaddr is specified\n"));
1067 /* lifetime consistency check */
1068 lt = &ifra->ifra_lifetime;
1069 if (lt->ia6t_pltime > lt->ia6t_vltime)
1071 if (lt->ia6t_vltime == 0) {
1073 * the following log might be noisy, but this is a typical
1074 * configuration mistake or a tool's bug.
1077 "in6_update_ifa: valid lifetime is 0 for %s\n",
1078 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1081 return (0); /* there's nothing to do */
1085 * If this is a new address, allocate a new ifaddr and link it
1091 * When in6_update_ifa() is called in a process of a received
1092 * RA, it is called under an interrupt context. So, we should
1093 * call malloc with M_NOWAIT.
1095 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
1099 bzero((caddr_t)ia, sizeof(*ia));
1100 ifa_init(&ia->ia_ifa);
1101 LIST_INIT(&ia->ia6_memberships);
1102 /* Initialize the address and masks, and put time stamp */
1103 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1104 ia->ia_addr.sin6_family = AF_INET6;
1105 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1106 ia->ia6_createtime = time_second;
1107 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1109 * XXX: some functions expect that ifa_dstaddr is not
1110 * NULL for p2p interfaces.
1112 ia->ia_ifa.ifa_dstaddr =
1113 (struct sockaddr *)&ia->ia_dstaddr;
1115 ia->ia_ifa.ifa_dstaddr = NULL;
1117 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1119 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1121 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1122 IF_ADDR_WUNLOCK(ifp);
1124 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1126 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1127 IN6_IFADDR_WUNLOCK();
1130 /* update timestamp */
1131 ia->ia6_updatetime = time_second;
1133 /* set prefix mask */
1134 if (ifra->ifra_prefixmask.sin6_len) {
1136 * We prohibit changing the prefix length of an existing
1138 * + such an operation should be rare in IPv6, and
1139 * + the operation would confuse prefix management.
1141 if (ia->ia_prefixmask.sin6_len &&
1142 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1143 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1144 " existing (%s) address should not be changed\n",
1145 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1149 ia->ia_prefixmask = ifra->ifra_prefixmask;
1153 * If a new destination address is specified, scrub the old one and
1154 * install the new destination. Note that the interface must be
1155 * p2p or loopback (see the check above.)
1157 if (dst6.sin6_family == AF_INET6 &&
1158 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1161 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1162 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1163 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1164 "a route to the old destination: %s\n",
1165 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1166 /* proceed anyway... */
1168 ia->ia_flags &= ~IFA_ROUTE;
1169 ia->ia_dstaddr = dst6;
1173 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1174 * to see if the address is deprecated or invalidated, but initialize
1175 * these members for applications.
1177 ia->ia6_lifetime = ifra->ifra_lifetime;
1178 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1179 ia->ia6_lifetime.ia6t_expire =
1180 time_second + ia->ia6_lifetime.ia6t_vltime;
1182 ia->ia6_lifetime.ia6t_expire = 0;
1183 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1184 ia->ia6_lifetime.ia6t_preferred =
1185 time_second + ia->ia6_lifetime.ia6t_pltime;
1187 ia->ia6_lifetime.ia6t_preferred = 0;
1189 /* reset the interface and routing table appropriately. */
1190 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1194 * configure address flags.
1196 ia->ia6_flags = ifra->ifra_flags;
1198 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1199 * userland, make it deprecated.
1201 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1202 ia->ia6_lifetime.ia6t_pltime = 0;
1203 ia->ia6_lifetime.ia6t_preferred = time_second;
1206 * Make the address tentative before joining multicast addresses,
1207 * so that corresponding MLD responses would not have a tentative
1210 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1211 if (hostIsNew && in6if_do_dad(ifp))
1212 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1214 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1215 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1216 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1219 * We are done if we have simply modified an existing address.
1225 * Beyond this point, we should call in6_purgeaddr upon an error,
1226 * not just go to unlink.
1229 /* Join necessary multicast groups. */
1231 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1232 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1238 * Perform DAD, if needed.
1239 * XXX It may be of use, if we can administratively disable DAD.
1241 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1242 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1244 int mindelay, maxdelay;
1247 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1249 * We need to impose a delay before sending an NS
1250 * for DAD. Check if we also needed a delay for the
1251 * corresponding MLD message. If we did, the delay
1252 * should be larger than the MLD delay (this could be
1253 * relaxed a bit, but this simple logic is at least
1255 * XXX: Break data hiding guidelines and look at
1256 * state for the solicited multicast group.
1259 if (in6m_sol != NULL &&
1260 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1261 mindelay = in6m_sol->in6m_timer;
1263 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1264 if (maxdelay - mindelay == 0)
1268 (arc4random() % (maxdelay - mindelay)) +
1272 nd6_dad_start((struct ifaddr *)ia, delay);
1275 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1276 ifa_free(&ia->ia_ifa);
1281 * XXX: if a change of an existing address failed, keep the entry
1285 in6_unlink_ifa(ia, ifp);
1286 ifa_free(&ia->ia_ifa);
1291 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1292 ifa_free(&ia->ia_ifa);
1293 in6_purgeaddr(&ia->ia_ifa);
1298 * Leave multicast groups. Factored out from in6_purgeaddr().
1299 * This entire work should only be done once, for the default FIB.
1302 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1304 struct sockaddr_in6 mltaddr, mltmask;
1305 struct in6_multi_mship *imm;
1307 struct sockaddr_in6 sin6;
1311 * Leave from multicast groups we have joined for the interface.
1313 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1314 LIST_REMOVE(imm, i6mm_chain);
1315 in6_leavegroup(imm);
1319 * Remove the link-local all-nodes address.
1321 bzero(&mltmask, sizeof(mltmask));
1322 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1323 mltmask.sin6_family = AF_INET6;
1324 mltmask.sin6_addr = in6mask32;
1326 bzero(&mltaddr, sizeof(mltaddr));
1327 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1328 mltaddr.sin6_family = AF_INET6;
1329 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1331 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1335 * As for the mltaddr above, proactively prepare the sin6 to avoid
1336 * rtentry un- and re-locking.
1339 bzero(&sin6, sizeof(sin6));
1340 sin6.sin6_len = sizeof(sin6);
1341 sin6.sin6_family = AF_INET6;
1342 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1343 sizeof(sin6.sin6_addr));
1344 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1349 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1350 if (rt != NULL && rt->rt_gateway != NULL &&
1351 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1352 &ia->ia_addr.sin6_addr,
1353 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1355 * If no more IPv6 address exists on this interface then
1356 * remove the multicast address route.
1359 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1360 sizeof(mltaddr.sin6_addr));
1362 error = in6_rtrequest(RTM_DELETE,
1363 (struct sockaddr *)&mltaddr,
1364 (struct sockaddr *)&ia->ia_addr,
1365 (struct sockaddr *)&mltmask, RTF_UP,
1366 (struct rtentry **)0, RT_DEFAULT_FIB);
1368 log(LOG_INFO, "%s: link-local all-nodes "
1369 "multicast address deletion error\n",
1373 * Replace the gateway of the route.
1375 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1384 * Remove the node-local all-nodes address.
1386 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1387 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1390 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1391 if (rt != NULL && rt->rt_gateway != NULL &&
1392 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1393 &ia->ia_addr.sin6_addr,
1394 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1396 * If no more IPv6 address exists on this interface then
1397 * remove the multicast address route.
1400 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1401 sizeof(mltaddr.sin6_addr));
1404 error = in6_rtrequest(RTM_DELETE,
1405 (struct sockaddr *)&mltaddr,
1406 (struct sockaddr *)&ia->ia_addr,
1407 (struct sockaddr *)&mltmask, RTF_UP,
1408 (struct rtentry **)0, RT_DEFAULT_FIB);
1410 log(LOG_INFO, "%s: node-local all-nodes"
1411 "multicast address deletion error\n",
1415 * Replace the gateway of the route.
1417 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1429 in6_purgeaddr(struct ifaddr *ifa)
1431 struct ifnet *ifp = ifa->ifa_ifp;
1432 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1434 struct ifaddr *ifa0;
1437 * find another IPv6 address as the gateway for the
1438 * link-local and node-local all-nodes multicast
1442 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1443 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1444 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1445 &ia->ia_addr.sin6_addr,
1446 sizeof(struct in6_addr)) == 0)
1453 IF_ADDR_RUNLOCK(ifp);
1456 * Remove the loopback route to the interface address.
1457 * The check for the current setting of "nd6_useloopback"
1460 if (ia->ia_flags & IFA_RTSELF) {
1461 error = ifa_del_loopback_route((struct ifaddr *)ia,
1462 (struct sockaddr *)&ia->ia_addr);
1464 ia->ia_flags &= ~IFA_RTSELF;
1467 /* stop DAD processing */
1470 /* Remove local address entry from lltable. */
1473 /* Leave multicast groups. */
1474 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1479 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1480 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1481 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1482 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1484 log(LOG_INFO, "%s: err=%d, destination address delete "
1485 "failed\n", __func__, error);
1486 ia->ia_flags &= ~IFA_ROUTE;
1489 in6_unlink_ifa(ia, ifp);
1493 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1498 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1499 IF_ADDR_WUNLOCK(ifp);
1500 ifa_free(&ia->ia_ifa); /* if_addrhead */
1503 * Defer the release of what might be the last reference to the
1504 * in6_ifaddr so that it can't be freed before the remainder of the
1508 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1509 IN6_IFADDR_WUNLOCK();
1512 * Release the reference to the base prefix. There should be a
1513 * positive reference.
1515 if (ia->ia6_ndpr == NULL) {
1517 "in6_unlink_ifa: autoconf'ed address "
1518 "%p has no prefix\n", ia));
1520 ia->ia6_ndpr->ndpr_refcnt--;
1521 ia->ia6_ndpr = NULL;
1525 * Also, if the address being removed is autoconf'ed, call
1526 * pfxlist_onlink_check() since the release might affect the status of
1527 * other (detached) addresses.
1529 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1530 pfxlist_onlink_check();
1532 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1537 in6_purgeif(struct ifnet *ifp)
1539 struct ifaddr *ifa, *nifa;
1541 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1542 if (ifa->ifa_addr->sa_family != AF_INET6)
1552 * SIOCGLIFADDR: get first address. (?)
1553 * SIOCGLIFADDR with IFLR_PREFIX:
1554 * get first address that matches the specified prefix.
1555 * SIOCALIFADDR: add the specified address.
1556 * SIOCALIFADDR with IFLR_PREFIX:
1557 * add the specified prefix, filling hostid part from
1558 * the first link-local address. prefixlen must be <= 64.
1559 * SIOCDLIFADDR: delete the specified address.
1560 * SIOCDLIFADDR with IFLR_PREFIX:
1561 * delete the first address that matches the specified prefix.
1563 * EINVAL on invalid parameters
1564 * EADDRNOTAVAIL on prefix match failed/specified address not found
1565 * other values may be returned from in6_ioctl()
1567 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1568 * this is to accomodate address naming scheme other than RFC2374,
1570 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1571 * address encoding scheme. (see figure on page 8)
1574 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1575 struct ifnet *ifp, struct thread *td)
1577 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1579 struct sockaddr *sa;
1582 if (!data || !ifp) {
1583 panic("invalid argument to in6_lifaddr_ioctl");
1589 /* address must be specified on GET with IFLR_PREFIX */
1590 if ((iflr->flags & IFLR_PREFIX) == 0)
1595 /* address must be specified on ADD and DELETE */
1596 sa = (struct sockaddr *)&iflr->addr;
1597 if (sa->sa_family != AF_INET6)
1599 if (sa->sa_len != sizeof(struct sockaddr_in6))
1601 /* XXX need improvement */
1602 sa = (struct sockaddr *)&iflr->dstaddr;
1603 if (sa->sa_family && sa->sa_family != AF_INET6)
1605 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1608 default: /* shouldn't happen */
1610 panic("invalid cmd to in6_lifaddr_ioctl");
1616 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1622 struct in6_aliasreq ifra;
1623 struct in6_addr *hostid = NULL;
1627 if ((iflr->flags & IFLR_PREFIX) != 0) {
1628 struct sockaddr_in6 *sin6;
1631 * hostid is to fill in the hostid part of the
1632 * address. hostid points to the first link-local
1633 * address attached to the interface.
1635 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1637 return EADDRNOTAVAIL;
1638 hostid = IFA_IN6(ifa);
1640 /* prefixlen must be <= 64. */
1641 if (64 < iflr->prefixlen) {
1646 prefixlen = iflr->prefixlen;
1648 /* hostid part must be zero. */
1649 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1650 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1651 sin6->sin6_addr.s6_addr32[3] != 0) {
1657 prefixlen = iflr->prefixlen;
1659 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1660 bzero(&ifra, sizeof(ifra));
1661 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1663 bcopy(&iflr->addr, &ifra.ifra_addr,
1664 ((struct sockaddr *)&iflr->addr)->sa_len);
1666 /* fill in hostid part */
1667 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1668 hostid->s6_addr32[2];
1669 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1670 hostid->s6_addr32[3];
1673 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1674 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1675 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1677 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1678 hostid->s6_addr32[2];
1679 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1680 hostid->s6_addr32[3];
1686 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1687 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1689 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1690 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1695 struct in6_ifaddr *ia;
1696 struct in6_addr mask, candidate, match;
1697 struct sockaddr_in6 *sin6;
1700 bzero(&mask, sizeof(mask));
1701 if (iflr->flags & IFLR_PREFIX) {
1702 /* lookup a prefix rather than address. */
1703 in6_prefixlen2mask(&mask, iflr->prefixlen);
1705 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1706 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1707 match.s6_addr32[0] &= mask.s6_addr32[0];
1708 match.s6_addr32[1] &= mask.s6_addr32[1];
1709 match.s6_addr32[2] &= mask.s6_addr32[2];
1710 match.s6_addr32[3] &= mask.s6_addr32[3];
1712 /* if you set extra bits, that's wrong */
1713 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1718 if (cmd == SIOCGLIFADDR) {
1719 /* on getting an address, take the 1st match */
1722 /* on deleting an address, do exact match */
1723 in6_prefixlen2mask(&mask, 128);
1724 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1725 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1732 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1733 if (ifa->ifa_addr->sa_family != AF_INET6)
1739 * XXX: this is adhoc, but is necessary to allow
1740 * a user to specify fe80::/64 (not /10) for a
1741 * link-local address.
1743 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1744 in6_clearscope(&candidate);
1745 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1746 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1747 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1748 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1749 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1754 IF_ADDR_RUNLOCK(ifp);
1756 return EADDRNOTAVAIL;
1759 if (cmd == SIOCGLIFADDR) {
1762 /* fill in the if_laddrreq structure */
1763 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1764 error = sa6_recoverscope(
1765 (struct sockaddr_in6 *)&iflr->addr);
1771 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1772 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1773 ia->ia_dstaddr.sin6_len);
1774 error = sa6_recoverscope(
1775 (struct sockaddr_in6 *)&iflr->dstaddr);
1781 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1784 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1786 iflr->flags = ia->ia6_flags; /* XXX */
1791 struct in6_aliasreq ifra;
1793 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1794 bzero(&ifra, sizeof(ifra));
1795 bcopy(iflr->iflr_name, ifra.ifra_name,
1796 sizeof(ifra.ifra_name));
1798 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1799 ia->ia_addr.sin6_len);
1800 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1801 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1802 ia->ia_dstaddr.sin6_len);
1804 bzero(&ifra.ifra_dstaddr,
1805 sizeof(ifra.ifra_dstaddr));
1807 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1808 ia->ia_prefixmask.sin6_len);
1810 ifra.ifra_flags = ia->ia6_flags;
1812 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1818 return EOPNOTSUPP; /* just for safety */
1822 * Initialize an interface's IPv6 address and routing table entry.
1825 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1826 struct sockaddr_in6 *sin6, int newhost)
1828 int error = 0, plen, ifacount = 0;
1833 * Give the interface a chance to initialize
1834 * if this is its first address,
1835 * and to validate the address if necessary.
1838 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1839 if (ifa->ifa_addr->sa_family != AF_INET6)
1843 IF_ADDR_RUNLOCK(ifp);
1845 ia->ia_addr = *sin6;
1847 if (ifacount <= 1 && ifp->if_ioctl) {
1848 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1856 ia->ia_ifa.ifa_metric = ifp->if_metric;
1858 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1862 * If a new destination address is specified for a point-to-point
1863 * interface, install a route to the destination as an interface
1865 * XXX: the logic below rejects assigning multiple addresses on a p2p
1866 * interface that share the same destination.
1868 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1869 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1870 ia->ia_dstaddr.sin6_family == AF_INET6) {
1871 int rtflags = RTF_UP | RTF_HOST;
1872 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1875 ia->ia_flags |= IFA_ROUTE;
1877 * Handle the case for ::1 .
1879 if (ifp->if_flags & IFF_LOOPBACK)
1880 ia->ia_flags |= IFA_RTSELF;
1884 * add a loopback route to self
1886 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1887 error = ifa_add_loopback_route((struct ifaddr *)ia,
1888 (struct sockaddr *)&ia->ia_addr);
1890 ia->ia_flags |= IFA_RTSELF;
1893 /* Add local address to lltable, if necessary (ex. on p2p link). */
1895 in6_ifaddloop(&(ia->ia_ifa));
1901 * Find an IPv6 interface link-local address specific to an interface.
1902 * ifaddr is returned referenced.
1905 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1910 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1911 if (ifa->ifa_addr->sa_family != AF_INET6)
1913 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1914 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1921 IF_ADDR_RUNLOCK(ifp);
1923 return ((struct in6_ifaddr *)ifa);
1928 * find the internet address corresponding to a given interface and address.
1929 * ifaddr is returned referenced.
1932 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1937 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1938 if (ifa->ifa_addr->sa_family != AF_INET6)
1940 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1945 IF_ADDR_RUNLOCK(ifp);
1947 return ((struct in6_ifaddr *)ifa);
1951 * Convert IP6 address to printable (loggable) representation. Caller
1952 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1954 static char digits[] = "0123456789abcdef";
1956 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1958 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1960 const u_int16_t *a = (const u_int16_t *)addr;
1962 int dcolon = 0, zero = 0;
1966 for (i = 0; i < 8; i++) {
1967 if (*(a + i) == 0) {
1972 else if (maxcnt < cnt) {
1983 for (i = 0; i < 8; i++) {
1994 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
2006 d = (const u_char *)a;
2007 /* Try to eliminate leading zeros in printout like in :0001. */
2009 *cp = digits[*d >> 4];
2014 *cp = digits[*d++ & 0xf];
2015 if (zero == 0 || (*cp != '0')) {
2019 *cp = digits[*d >> 4];
2020 if (zero == 0 || (*cp != '0')) {
2024 *cp++ = digits[*d & 0xf];
2033 in6_localaddr(struct in6_addr *in6)
2035 struct in6_ifaddr *ia;
2037 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2041 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2042 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2043 &ia->ia_prefixmask.sin6_addr)) {
2044 IN6_IFADDR_RUNLOCK();
2048 IN6_IFADDR_RUNLOCK();
2054 * Return 1 if an internet address is for the local host and configured
2055 * on one of its interfaces.
2058 in6_localip(struct in6_addr *in6)
2060 struct in6_ifaddr *ia;
2063 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2064 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2065 IN6_IFADDR_RUNLOCK();
2069 IN6_IFADDR_RUNLOCK();
2075 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2077 struct in6_ifaddr *ia;
2080 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2081 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
2083 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) {
2084 IN6_IFADDR_RUNLOCK();
2085 return (1); /* true */
2088 /* XXX: do we still have to go thru the rest of the list? */
2090 IN6_IFADDR_RUNLOCK();
2092 return (0); /* false */
2096 * return length of part which dst and src are equal
2100 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2103 u_char *s = (u_char *)src, *d = (u_char *)dst;
2104 u_char *lim = s + 16, r;
2107 if ((r = (*d++ ^ *s++)) != 0) {
2118 /* XXX: to be scope conscious */
2120 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2122 int bytelen, bitlen;
2125 if (0 > len || len > 128) {
2126 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2134 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2137 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2138 p2->s6_addr[bytelen] >> (8 - bitlen))
2145 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2147 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2148 int bytelen, bitlen, i;
2151 if (0 > len || len > 128) {
2152 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2157 bzero(maskp, sizeof(*maskp));
2160 for (i = 0; i < bytelen; i++)
2161 maskp->s6_addr[i] = 0xff;
2163 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2167 * return the best address out of the same scope. if no address was
2168 * found, return the first valid address from designated IF.
2171 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2173 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2175 struct in6_ifaddr *besta = 0;
2176 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2178 dep[0] = dep[1] = NULL;
2181 * We first look for addresses in the same scope.
2182 * If there is one, return it.
2183 * If two or more, return one which matches the dst longest.
2184 * If none, return one of global addresses assigned other ifs.
2187 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2188 if (ifa->ifa_addr->sa_family != AF_INET6)
2190 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2191 continue; /* XXX: is there any case to allow anycast? */
2192 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2193 continue; /* don't use this interface */
2194 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2196 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2197 if (V_ip6_use_deprecated)
2198 dep[0] = (struct in6_ifaddr *)ifa;
2202 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2204 * call in6_matchlen() as few as possible
2208 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2209 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2212 besta = (struct in6_ifaddr *)ifa;
2215 besta = (struct in6_ifaddr *)ifa;
2219 ifa_ref(&besta->ia_ifa);
2220 IF_ADDR_RUNLOCK(ifp);
2224 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2225 if (ifa->ifa_addr->sa_family != AF_INET6)
2227 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2228 continue; /* XXX: is there any case to allow anycast? */
2229 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2230 continue; /* don't use this interface */
2231 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2233 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2234 if (V_ip6_use_deprecated)
2235 dep[1] = (struct in6_ifaddr *)ifa;
2241 IF_ADDR_RUNLOCK(ifp);
2242 return (struct in6_ifaddr *)ifa;
2245 /* use the last-resort values, that are, deprecated addresses */
2247 ifa_ref((struct ifaddr *)dep[0]);
2248 IF_ADDR_RUNLOCK(ifp);
2252 ifa_ref((struct ifaddr *)dep[1]);
2253 IF_ADDR_RUNLOCK(ifp);
2257 IF_ADDR_RUNLOCK(ifp);
2262 * perform DAD when interface becomes IFF_UP.
2265 in6_if_up(struct ifnet *ifp)
2268 struct in6_ifaddr *ia;
2271 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2272 if (ifa->ifa_addr->sa_family != AF_INET6)
2274 ia = (struct in6_ifaddr *)ifa;
2275 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2277 * The TENTATIVE flag was likely set by hand
2278 * beforehand, implicitly indicating the need for DAD.
2279 * We may be able to skip the random delay in this
2280 * case, but we impose delays just in case.
2283 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2286 IF_ADDR_RUNLOCK(ifp);
2289 * special cases, like 6to4, are handled in in6_ifattach
2291 in6_ifattach(ifp, NULL);
2295 in6if_do_dad(struct ifnet *ifp)
2297 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2300 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2303 switch (ifp->if_type) {
2309 * These interfaces do not have the IFF_LOOPBACK flag,
2310 * but loop packets back. We do not have to do DAD on such
2311 * interfaces. We should even omit it, because loop-backed
2312 * NS would confuse the DAD procedure.
2317 * Our DAD routine requires the interface up and running.
2318 * However, some interfaces can be up before the RUNNING
2319 * status. Additionaly, users may try to assign addresses
2320 * before the interface becomes up (or running).
2321 * We simply skip DAD in such a case as a work around.
2322 * XXX: we should rather mark "tentative" on such addresses,
2323 * and do DAD after the interface becomes ready.
2325 if (!((ifp->if_flags & IFF_UP) &&
2326 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2334 * Calculate max IPv6 MTU through all the interfaces and store it
2340 unsigned long maxmtu = 0;
2343 IFNET_RLOCK_NOSLEEP();
2344 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2345 /* this function can be called during ifnet initialization */
2346 if (!ifp->if_afdata[AF_INET6])
2348 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2349 IN6_LINKMTU(ifp) > maxmtu)
2350 maxmtu = IN6_LINKMTU(ifp);
2352 IFNET_RUNLOCK_NOSLEEP();
2353 if (maxmtu) /* update only when maxmtu is positive */
2354 V_in6_maxmtu = maxmtu;
2358 * Provide the length of interface identifiers to be used for the link attached
2359 * to the given interface. The length should be defined in "IPv6 over
2360 * xxx-link" document. Note that address architecture might also define
2361 * the length for a particular set of address prefixes, regardless of the
2362 * link type. As clarified in rfc2462bis, those two definitions should be
2363 * consistent, and those really are as of August 2004.
2366 in6_if2idlen(struct ifnet *ifp)
2368 switch (ifp->if_type) {
2369 case IFT_ETHER: /* RFC2464 */
2370 #ifdef IFT_PROPVIRTUAL
2371 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2374 case IFT_L2VLAN: /* ditto */
2376 #ifdef IFT_IEEE80211
2377 case IFT_IEEE80211: /* ditto */
2380 case IFT_MIP: /* ditto */
2382 case IFT_INFINIBAND:
2384 case IFT_FDDI: /* RFC2467 */
2386 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2388 case IFT_PPP: /* RFC2472 */
2390 case IFT_ARCNET: /* RFC2497 */
2392 case IFT_FRELAY: /* RFC2590 */
2394 case IFT_IEEE1394: /* RFC3146 */
2397 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2399 return (64); /* XXX: is this really correct? */
2402 * Unknown link type:
2403 * It might be controversial to use the today's common constant
2404 * of 64 for these cases unconditionally. For full compliance,
2405 * we should return an error in this case. On the other hand,
2406 * if we simply miss the standard for the link type or a new
2407 * standard is defined for a new link type, the IFID length
2408 * is very likely to be the common constant. As a compromise,
2409 * we always use the constant, but make an explicit notice
2410 * indicating the "unknown" case.
2412 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2417 #include <sys/sysctl.h>
2419 struct in6_llentry {
2420 struct llentry base;
2421 struct sockaddr_in6 l3_addr6;
2424 static struct llentry *
2425 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2427 struct in6_llentry *lle;
2429 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE,
2430 M_DONTWAIT | M_ZERO);
2431 if (lle == NULL) /* NB: caller generates msg */
2434 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2435 lle->base.lle_refcnt = 1;
2436 LLE_LOCK_INIT(&lle->base);
2437 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2438 CALLOUT_RETURNUNLOCKED);
2444 * Deletes an address from the address table.
2445 * This function is called by the timer functions
2446 * such as arptimer() and nd6_llinfo_timer(), and
2447 * the caller does the locking.
2450 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2453 LLE_LOCK_DESTROY(lle);
2454 free(lle, M_LLTABLE);
2458 in6_lltable_prefix_free(struct lltable *llt,
2459 const struct sockaddr *prefix,
2460 const struct sockaddr *mask,
2463 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2464 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2465 struct llentry *lle, *next;
2469 * (flags & LLE_STATIC) means deleting all entries
2470 * including static ND6 entries
2472 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) {
2473 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2474 if (IN6_ARE_MASKED_ADDR_EQUAL(
2475 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr,
2478 ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))) {
2481 canceled = callout_drain(&lle->la_timer);
2492 in6_lltable_rtcheck(struct ifnet *ifp,
2494 const struct sockaddr *l3addr)
2497 char ip6buf[INET6_ADDRSTRLEN];
2499 KASSERT(l3addr->sa_family == AF_INET6,
2500 ("sin_family %d", l3addr->sa_family));
2502 /* Our local addresses are always only installed on the default FIB. */
2503 /* XXX rtalloc1 should take a const param */
2504 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2506 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2509 * Create an ND6 cache for an IPv6 neighbor
2510 * that is not covered by our own prefix.
2512 /* XXX ifaof_ifpforaddr should take a const param */
2513 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2520 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2521 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2530 static struct llentry *
2531 in6_lltable_lookup(struct lltable *llt, u_int flags,
2532 const struct sockaddr *l3addr)
2534 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2535 struct ifnet *ifp = llt->llt_ifp;
2536 struct llentry *lle;
2537 struct llentries *lleh;
2540 IF_AFDATA_LOCK_ASSERT(ifp);
2541 KASSERT(l3addr->sa_family == AF_INET6,
2542 ("sin_family %d", l3addr->sa_family));
2544 hashkey = sin6->sin6_addr.s6_addr32[3];
2545 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2546 LIST_FOREACH(lle, lleh, lle_next) {
2547 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2548 if (lle->la_flags & LLE_DELETED)
2550 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2551 sizeof(struct in6_addr)) == 0)
2556 if (!(flags & LLE_CREATE))
2559 * A route that covers the given address must have
2560 * been installed 1st because we are doing a resolution,
2563 if (!(flags & LLE_IFADDR) &&
2564 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2567 lle = in6_lltable_new(l3addr, flags);
2569 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2572 lle->la_flags = flags & ~LLE_CREATE;
2573 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2574 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2575 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2579 lle->lle_head = lleh;
2580 LIST_INSERT_HEAD(lleh, lle, lle_next);
2581 } else if (flags & LLE_DELETE) {
2582 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2584 lle->la_flags = LLE_DELETED;
2587 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2592 if (LLE_IS_VALID(lle)) {
2593 if (flags & LLE_EXCLUSIVE)
2602 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2604 struct ifnet *ifp = llt->llt_ifp;
2605 struct llentry *lle;
2608 struct rt_msghdr rtm;
2609 struct sockaddr_in6 sin6;
2611 * ndp.c assumes that sdl is word aligned
2616 struct sockaddr_dl sdl;
2620 if (ifp->if_flags & IFF_LOOPBACK)
2623 LLTABLE_LOCK_ASSERT();
2626 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2627 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2628 struct sockaddr_dl *sdl;
2630 /* skip deleted or invalid entries */
2631 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2633 /* Skip if jailed and not a valid IP of the prison. */
2634 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2637 * produce a msg made of:
2639 * struct sockaddr_in6 (IPv6)
2640 * struct sockaddr_dl;
2642 bzero(&ndpc, sizeof(ndpc));
2643 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2644 ndpc.rtm.rtm_version = RTM_VERSION;
2645 ndpc.rtm.rtm_type = RTM_GET;
2646 ndpc.rtm.rtm_flags = RTF_UP;
2647 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2648 ndpc.sin6.sin6_family = AF_INET6;
2649 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2650 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2653 if (lle->la_flags & LLE_PUB)
2654 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2657 sdl->sdl_family = AF_LINK;
2658 sdl->sdl_len = sizeof(*sdl);
2659 sdl->sdl_alen = ifp->if_addrlen;
2660 sdl->sdl_index = ifp->if_index;
2661 sdl->sdl_type = ifp->if_type;
2662 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2663 ndpc.rtm.rtm_rmx.rmx_expire =
2664 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2665 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2666 if (lle->la_flags & LLE_STATIC)
2667 ndpc.rtm.rtm_flags |= RTF_STATIC;
2668 ndpc.rtm.rtm_index = ifp->if_index;
2669 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2678 in6_domifattach(struct ifnet *ifp)
2680 struct in6_ifextra *ext;
2682 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2683 bzero(ext, sizeof(*ext));
2685 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2686 M_IFADDR, M_WAITOK);
2687 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2690 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2691 M_IFADDR, M_WAITOK);
2692 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2694 ext->nd_ifinfo = nd6_ifattach(ifp);
2695 ext->scope6_id = scope6_ifattach(ifp);
2696 ext->lltable = lltable_init(ifp, AF_INET6);
2697 if (ext->lltable != NULL) {
2698 ext->lltable->llt_free = in6_lltable_free;
2699 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2700 ext->lltable->llt_lookup = in6_lltable_lookup;
2701 ext->lltable->llt_dump = in6_lltable_dump;
2704 ext->mld_ifinfo = mld_domifattach(ifp);
2710 in6_domifdetach(struct ifnet *ifp, void *aux)
2712 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2714 mld_domifdetach(ifp);
2715 scope6_ifdetach(ext->scope6_id);
2716 nd6_ifdetach(ext->nd_ifinfo);
2717 lltable_free(ext->lltable);
2718 free(ext->in6_ifstat, M_IFADDR);
2719 free(ext->icmp6_ifstat, M_IFADDR);
2720 free(ext, M_IFADDR);
2724 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2725 * v4 mapped addr or v4 compat addr
2728 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2731 bzero(sin, sizeof(*sin));
2732 sin->sin_len = sizeof(struct sockaddr_in);
2733 sin->sin_family = AF_INET;
2734 sin->sin_port = sin6->sin6_port;
2735 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2738 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2740 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2742 bzero(sin6, sizeof(*sin6));
2743 sin6->sin6_len = sizeof(struct sockaddr_in6);
2744 sin6->sin6_family = AF_INET6;
2745 sin6->sin6_port = sin->sin_port;
2746 sin6->sin6_addr.s6_addr32[0] = 0;
2747 sin6->sin6_addr.s6_addr32[1] = 0;
2748 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2749 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2752 /* Convert sockaddr_in6 into sockaddr_in. */
2754 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2756 struct sockaddr_in *sin_p;
2757 struct sockaddr_in6 sin6;
2760 * Save original sockaddr_in6 addr and convert it
2763 sin6 = *(struct sockaddr_in6 *)nam;
2764 sin_p = (struct sockaddr_in *)nam;
2765 in6_sin6_2_sin(sin_p, &sin6);
2768 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2770 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2772 struct sockaddr_in *sin_p;
2773 struct sockaddr_in6 *sin6_p;
2775 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
2777 sin_p = (struct sockaddr_in *)*nam;
2778 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2779 free(*nam, M_SONAME);
2780 *nam = (struct sockaddr *)sin6_p;