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>
108 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
109 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
112 * Definitions of some costant IP6 addresses.
114 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
115 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
116 const struct in6_addr in6addr_nodelocal_allnodes =
117 IN6ADDR_NODELOCAL_ALLNODES_INIT;
118 const struct in6_addr in6addr_linklocal_allnodes =
119 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
120 const struct in6_addr in6addr_linklocal_allrouters =
121 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
122 const struct in6_addr in6addr_linklocal_allv2routers =
123 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
125 const struct in6_addr in6mask0 = IN6MASK0;
126 const struct in6_addr in6mask32 = IN6MASK32;
127 const struct in6_addr in6mask64 = IN6MASK64;
128 const struct in6_addr in6mask96 = IN6MASK96;
129 const struct in6_addr in6mask128 = IN6MASK128;
131 const struct sockaddr_in6 sa6_any =
132 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
134 static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t,
135 struct ifnet *, struct thread *);
136 static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
137 struct sockaddr_in6 *, int);
138 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
140 int (*faithprefix_p)(struct in6_addr *);
142 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
143 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
146 in6_ifaddloop(struct ifaddr *ifa)
148 struct sockaddr_dl gateway;
149 struct sockaddr_in6 mask, addr;
151 struct in6_ifaddr *ia;
158 ifa->ifa_rtrequest = nd6_rtrequest;
159 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
160 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
161 IF_AFDATA_UNLOCK(ifp);
163 ln->la_expire = 0; /* for IPv6 this means permanent */
164 ln->ln_state = ND6_LLINFO_REACHABLE;
166 * initialize for rtmsg generation
168 bzero(&gateway, sizeof(gateway));
169 gateway.sdl_len = sizeof(gateway);
170 gateway.sdl_family = AF_LINK;
171 gateway.sdl_nlen = 0;
172 gateway.sdl_alen = 6;
173 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
174 sizeof(ln->ll_addr));
178 bzero(&rt, sizeof(rt));
179 rt.rt_gateway = (struct sockaddr *)&gateway;
180 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
181 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
182 rt_mask(&rt) = (struct sockaddr *)&mask;
183 rt_key(&rt) = (struct sockaddr *)&addr;
184 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
185 /* Announce arrival of local address to all FIBs. */
186 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
190 in6_ifremloop(struct ifaddr *ifa)
192 struct sockaddr_dl gateway;
193 struct sockaddr_in6 mask, addr;
195 struct in6_ifaddr *ia;
200 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
201 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
202 lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
203 (struct sockaddr *)&mask, LLE_STATIC);
206 * initialize for rtmsg generation
208 bzero(&gateway, sizeof(gateway));
209 gateway.sdl_len = sizeof(gateway);
210 gateway.sdl_family = AF_LINK;
211 gateway.sdl_nlen = 0;
212 gateway.sdl_alen = ifp->if_addrlen;
213 bzero(&rt0, sizeof(rt0));
214 rt0.rt_gateway = (struct sockaddr *)&gateway;
215 rt_mask(&rt0) = (struct sockaddr *)&mask;
216 rt_key(&rt0) = (struct sockaddr *)&addr;
217 rt0.rt_flags = RTF_HOST | RTF_STATIC;
218 /* Announce removal of local address to all FIBs. */
219 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
223 in6_mask2len(struct in6_addr *mask, u_char *lim0)
226 u_char *lim = lim0, *p;
228 /* ignore the scope_id part */
229 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
230 lim = (u_char *)mask + sizeof(*mask);
231 for (p = (u_char *)mask; p < lim; x++, p++) {
237 for (y = 0; y < 8; y++) {
238 if ((*p & (0x80 >> y)) == 0)
244 * when the limit pointer is given, do a stricter check on the
248 if (y != 0 && (*p & (0x00ff >> y)) != 0)
250 for (p = p + 1; p < lim; p++)
258 #ifdef COMPAT_FREEBSD32
259 struct in6_ndifreq32 {
260 char ifname[IFNAMSIZ];
263 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
267 in6_control(struct socket *so, u_long cmd, caddr_t data,
268 struct ifnet *ifp, struct thread *td)
270 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
271 struct in6_ifaddr *ia = NULL;
272 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
273 struct sockaddr_in6 *sa6;
277 case SIOCGETSGCNT_IN6:
278 case SIOCGETMIFCNT_IN6:
280 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
281 * We cannot see how that would be needed, so do not adjust the
282 * KPI blindly; more likely should clean up the IPv4 variant.
284 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
288 case SIOCAADDRCTL_POLICY:
289 case SIOCDADDRCTL_POLICY:
291 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
295 return (in6_src_ioctl(cmd, data));
302 case SIOCSNDFLUSH_IN6:
303 case SIOCSPFXFLUSH_IN6:
304 case SIOCSRTRFLUSH_IN6:
305 case SIOCSDEFIFACE_IN6:
306 case SIOCSIFINFO_FLAGS:
307 case SIOCSIFINFO_IN6:
309 error = priv_check(td, PRIV_NETINET_ND6);
314 case OSIOCGIFINFO_IN6:
315 case SIOCGIFINFO_IN6:
318 case SIOCGNBRINFO_IN6:
319 case SIOCGDEFIFACE_IN6:
320 return (nd6_ioctl(cmd, data, ifp));
322 #ifdef COMPAT_FREEBSD32
323 case SIOCGDEFIFACE32_IN6:
325 struct in6_ndifreq ndif;
326 struct in6_ndifreq32 *ndif32;
328 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
332 ndif32 = (struct in6_ndifreq32 *)data;
333 ndif32->ifindex = ndif.ifindex;
340 case SIOCSIFPREFIX_IN6:
341 case SIOCDIFPREFIX_IN6:
342 case SIOCAIFPREFIX_IN6:
343 case SIOCCIFPREFIX_IN6:
344 case SIOCSGIFPREFIX_IN6:
345 case SIOCGIFPREFIX_IN6:
347 "prefix ioctls are now invalidated. "
348 "please use ifconfig.\n");
355 error = priv_check(td, PRIV_NETINET_SCOPE6);
359 return (scope6_set(ifp,
360 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
362 return (scope6_get(ifp,
363 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
365 return (scope6_get_default((struct scope6_id *)
366 ifr->ifr_ifru.ifru_scope_id));
372 error = priv_check(td, PRIV_NET_ADDIFADDR);
376 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
380 error = priv_check(td, PRIV_NET_DELIFADDR);
386 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
390 * Find address for this interface, if it exists.
392 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
393 * only, and used the first interface address as the target of other
394 * operations (without checking ifra_addr). This was because netinet
395 * code/API assumed at most 1 interface address per interface.
396 * Since IPv6 allows a node to assign multiple addresses
397 * on a single interface, we almost always look and check the
398 * presence of ifra_addr, and reject invalid ones here.
399 * It also decreases duplicated code among SIOC*_IN6 operations.
402 case SIOCAIFADDR_IN6:
403 case SIOCSIFPHYADDR_IN6:
404 sa6 = &ifra->ifra_addr;
406 case SIOCSIFADDR_IN6:
407 case SIOCGIFADDR_IN6:
408 case SIOCSIFDSTADDR_IN6:
409 case SIOCSIFNETMASK_IN6:
410 case SIOCGIFDSTADDR_IN6:
411 case SIOCGIFNETMASK_IN6:
412 case SIOCDIFADDR_IN6:
413 case SIOCGIFPSRCADDR_IN6:
414 case SIOCGIFPDSTADDR_IN6:
415 case SIOCGIFAFLAG_IN6:
416 case SIOCSNDFLUSH_IN6:
417 case SIOCSPFXFLUSH_IN6:
418 case SIOCSRTRFLUSH_IN6:
419 case SIOCGIFALIFETIME_IN6:
420 case SIOCSIFALIFETIME_IN6:
421 case SIOCGIFSTAT_IN6:
422 case SIOCGIFSTAT_ICMP6:
423 sa6 = &ifr->ifr_addr;
429 if (sa6 && sa6->sin6_family == AF_INET6) {
430 if (sa6->sin6_scope_id != 0)
431 error = sa6_embedscope(sa6, 0);
433 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
436 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
437 &sa6->sin6_addr)) != 0)
439 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
444 case SIOCSIFADDR_IN6:
445 case SIOCSIFDSTADDR_IN6:
446 case SIOCSIFNETMASK_IN6:
448 * Since IPv6 allows a node to assign multiple addresses
449 * on a single interface, SIOCSIFxxx ioctls are deprecated.
451 /* we decided to obsolete this command (20000704) */
455 case SIOCDIFADDR_IN6:
457 * for IPv4, we look for existing in_ifaddr here to allow
458 * "ifconfig if0 delete" to remove the first IPv4 address on
459 * the interface. For IPv6, as the spec allows multiple
460 * interface address from the day one, we consider "remove the
461 * first one" semantics to be not preferable.
464 error = EADDRNOTAVAIL;
468 case SIOCAIFADDR_IN6:
470 * We always require users to specify a valid IPv6 address for
471 * the corresponding operation.
473 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
474 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
475 error = EAFNOSUPPORT;
480 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
481 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
487 case SIOCGIFADDR_IN6:
488 /* This interface is basically deprecated. use SIOCGIFCONF. */
490 case SIOCGIFAFLAG_IN6:
491 case SIOCGIFNETMASK_IN6:
492 case SIOCGIFDSTADDR_IN6:
493 case SIOCGIFALIFETIME_IN6:
494 /* must think again about its semantics */
496 error = EADDRNOTAVAIL;
501 case SIOCSIFALIFETIME_IN6:
503 struct in6_addrlifetime *lt;
506 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
511 error = EADDRNOTAVAIL;
514 /* sanity for overflow - beware unsigned */
515 lt = &ifr->ifr_ifru.ifru_lifetime;
516 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
517 lt->ia6t_vltime + time_second < time_second) {
521 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
522 lt->ia6t_pltime + time_second < time_second) {
531 case SIOCGIFADDR_IN6:
532 ifr->ifr_addr = ia->ia_addr;
533 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
537 case SIOCGIFDSTADDR_IN6:
538 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
543 * XXX: should we check if ifa_dstaddr is NULL and return
546 ifr->ifr_dstaddr = ia->ia_dstaddr;
547 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
551 case SIOCGIFNETMASK_IN6:
552 ifr->ifr_addr = ia->ia_prefixmask;
555 case SIOCGIFAFLAG_IN6:
556 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
559 case SIOCGIFSTAT_IN6:
564 bzero(&ifr->ifr_ifru.ifru_stat,
565 sizeof(ifr->ifr_ifru.ifru_stat));
566 ifr->ifr_ifru.ifru_stat =
567 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
570 case SIOCGIFSTAT_ICMP6:
575 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
576 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
577 ifr->ifr_ifru.ifru_icmp6stat =
578 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
581 case SIOCGIFALIFETIME_IN6:
582 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
583 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
585 struct in6_addrlifetime *retlt =
586 &ifr->ifr_ifru.ifru_lifetime;
589 * XXX: adjust expiration time assuming time_t is
593 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
594 if (ia->ia6_lifetime.ia6t_vltime <
595 maxexpire - ia->ia6_updatetime) {
596 retlt->ia6t_expire = ia->ia6_updatetime +
597 ia->ia6_lifetime.ia6t_vltime;
599 retlt->ia6t_expire = maxexpire;
601 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
603 struct in6_addrlifetime *retlt =
604 &ifr->ifr_ifru.ifru_lifetime;
607 * XXX: adjust expiration time assuming time_t is
611 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
612 if (ia->ia6_lifetime.ia6t_pltime <
613 maxexpire - ia->ia6_updatetime) {
614 retlt->ia6t_preferred = ia->ia6_updatetime +
615 ia->ia6_lifetime.ia6t_pltime;
617 retlt->ia6t_preferred = maxexpire;
621 case SIOCSIFALIFETIME_IN6:
622 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
624 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
625 ia->ia6_lifetime.ia6t_expire =
626 time_second + ia->ia6_lifetime.ia6t_vltime;
628 ia->ia6_lifetime.ia6t_expire = 0;
629 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
630 ia->ia6_lifetime.ia6t_preferred =
631 time_second + ia->ia6_lifetime.ia6t_pltime;
633 ia->ia6_lifetime.ia6t_preferred = 0;
636 case SIOCAIFADDR_IN6:
639 struct nd_prefixctl pr0;
640 struct nd_prefix *pr;
643 * first, make or update the interface address structure,
644 * and link it to the list.
646 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
649 ifa_free(&ia->ia_ifa);
650 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
653 * this can happen when the user specify the 0 valid
660 * then, make the prefix on-link on the interface.
661 * XXX: we'd rather create the prefix before the address, but
662 * we need at least one address to install the corresponding
663 * interface route, so we configure the address first.
667 * convert mask to prefix length (prefixmask has already
668 * been validated in in6_update_ifa().
670 bzero(&pr0, sizeof(pr0));
672 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
674 if (pr0.ndpr_plen == 128) {
675 break; /* we don't need to install a host route. */
677 pr0.ndpr_prefix = ifra->ifra_addr;
678 /* apply the mask for safety. */
679 for (i = 0; i < 4; i++) {
680 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
681 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
684 * XXX: since we don't have an API to set prefix (not address)
685 * lifetimes, we just use the same lifetimes as addresses.
686 * The (temporarily) installed lifetimes can be overridden by
687 * later advertised RAs (when accept_rtadv is non 0), which is
688 * an intended behavior.
690 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
692 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
693 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
694 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
696 /* add the prefix if not yet. */
697 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
699 * nd6_prelist_add will install the corresponding
702 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
705 log(LOG_ERR, "nd6_prelist_add succeeded but "
712 /* relate the address to the prefix */
713 if (ia->ia6_ndpr == NULL) {
718 * If this is the first autoconf address from the
719 * prefix, create a temporary address as well
722 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
723 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
725 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
726 log(LOG_NOTICE, "in6_control: failed "
727 "to create a temporary address, "
734 * this might affect the status of autoconfigured addresses,
735 * that is, this address might make other addresses detached.
737 pfxlist_onlink_check();
738 if (error == 0 && ia) {
739 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
741 * Try to clear the flag when a new
742 * IPv6 address is added onto an
743 * IFDISABLED interface and it
746 struct in6_ndireq nd;
748 memset(&nd, 0, sizeof(nd));
749 nd.ndi.flags = ND_IFINFO(ifp)->flags;
750 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
751 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
752 (caddr_t)&nd, ifp) < 0)
753 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
754 "SIOCSIFINFO_FLAGS for -ifdisabled "
757 * Ignore failure of clearing the flag
758 * intentionally. The failure means
759 * address duplication was detected.
762 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
767 case SIOCDIFADDR_IN6:
769 struct nd_prefix *pr;
772 * If the address being deleted is the only one that owns
773 * the corresponding prefix, expire the prefix as well.
774 * XXX: theoretically, we don't have to worry about such
775 * relationship, since we separate the address management
776 * and the prefix management. We do this, however, to provide
777 * as much backward compatibility as possible in terms of
778 * the ioctl operation.
779 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
782 in6_purgeaddr(&ia->ia_ifa);
783 if (pr && pr->ndpr_refcnt == 0)
785 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
790 if (ifp == NULL || ifp->if_ioctl == 0) {
794 error = (*ifp->if_ioctl)(ifp, cmd, data);
801 ifa_free(&ia->ia_ifa);
807 * Join necessary multicast groups. Factored out from in6_update_ifa().
808 * This entire work should only be done once, for the default FIB.
811 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
812 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
814 char ip6buf[INET6_ADDRSTRLEN];
815 struct sockaddr_in6 mltaddr, mltmask;
816 struct in6_addr llsol;
817 struct in6_multi_mship *imm;
821 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
823 /* Join solicited multicast addr for new host id. */
824 bzero(&llsol, sizeof(struct in6_addr));
825 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
826 llsol.s6_addr32[1] = 0;
827 llsol.s6_addr32[2] = htonl(1);
828 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
829 llsol.s6_addr8[12] = 0xff;
830 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
831 /* XXX: should not happen */
832 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
836 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
838 * We need a random delay for DAD on the address being
839 * configured. It also means delaying transmission of the
840 * corresponding MLD report to avoid report collision.
841 * [RFC 4861, Section 6.3.7]
843 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
845 imm = in6_joingroup(ifp, &llsol, &error, delay);
847 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
848 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
849 if_name(ifp), error));
852 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
853 *in6m_sol = imm->i6mm_maddr;
855 bzero(&mltmask, sizeof(mltmask));
856 mltmask.sin6_len = sizeof(struct sockaddr_in6);
857 mltmask.sin6_family = AF_INET6;
858 mltmask.sin6_addr = in6mask32;
859 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
862 * Join link-local all-nodes address.
864 bzero(&mltaddr, sizeof(mltaddr));
865 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
866 mltaddr.sin6_family = AF_INET6;
867 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
868 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
869 goto cleanup; /* XXX: should not fail */
872 * XXX: do we really need this automatic routes? We should probably
873 * reconsider this stuff. Most applications actually do not need the
874 * routes, since they usually specify the outgoing interface.
876 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
878 /* XXX: only works in !SCOPEDROUTING case. */
879 if (memcmp(&mltaddr.sin6_addr,
880 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
887 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
888 (struct sockaddr *)&ia->ia_addr,
889 (struct sockaddr *)&mltmask, RTF_UP,
890 (struct rtentry **)0, RT_DEFAULT_FIB);
896 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
898 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
899 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
900 &mltaddr.sin6_addr), if_name(ifp), error));
903 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
906 * Join node information group address.
909 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
911 * The spec does not say anything about delay for this group,
912 * but the same logic should apply.
914 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
916 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
918 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
920 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
921 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
922 &mltaddr.sin6_addr), if_name(ifp), error));
923 /* XXX not very fatal, go on... */
925 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
927 if (V_icmp6_nodeinfo_oldmcprefix &&
928 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
929 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
931 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
932 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
933 &mltaddr.sin6_addr), if_name(ifp), error));
934 /* XXX not very fatal, go on... */
936 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
940 * Join interface-local all-nodes address.
941 * (ff01::1%ifN, and ff01::%ifN/32)
943 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
944 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
945 goto cleanup; /* XXX: should not fail */
946 /* XXX: again, do we really need the route? */
947 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
949 if (memcmp(&mltaddr.sin6_addr,
950 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
957 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
958 (struct sockaddr *)&ia->ia_addr,
959 (struct sockaddr *)&mltmask, RTF_UP,
960 (struct rtentry **)0, RT_DEFAULT_FIB);
966 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
968 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
969 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
970 &mltaddr.sin6_addr), if_name(ifp), error));
973 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
981 * Update parameters of an IPv6 interface address.
982 * If necessary, a new entry is created and linked into address chains.
983 * This function is separated from in6_control().
984 * XXX: should this be performed under splnet()?
987 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
988 struct in6_ifaddr *ia, int flags)
990 int error = 0, hostIsNew = 0, plen = -1;
991 struct sockaddr_in6 dst6;
992 struct in6_addrlifetime *lt;
993 struct in6_multi *in6m_sol;
995 char ip6buf[INET6_ADDRSTRLEN];
997 /* Validate parameters */
998 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1002 * The destination address for a p2p link must have a family
1003 * of AF_UNSPEC or AF_INET6.
1005 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1006 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1007 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1008 return (EAFNOSUPPORT);
1010 * validate ifra_prefixmask. don't check sin6_family, netmask
1011 * does not carry fields other than sin6_len.
1013 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1016 * Because the IPv6 address architecture is classless, we require
1017 * users to specify a (non 0) prefix length (mask) for a new address.
1018 * We also require the prefix (when specified) mask is valid, and thus
1019 * reject a non-consecutive mask.
1021 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1023 if (ifra->ifra_prefixmask.sin6_len != 0) {
1024 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1025 (u_char *)&ifra->ifra_prefixmask +
1026 ifra->ifra_prefixmask.sin6_len);
1031 * In this case, ia must not be NULL. We just use its prefix
1034 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1037 * If the destination address on a p2p interface is specified,
1038 * and the address is a scoped one, validate/set the scope
1041 dst6 = ifra->ifra_dstaddr;
1042 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1043 (dst6.sin6_family == AF_INET6)) {
1044 struct in6_addr in6_tmp;
1047 in6_tmp = dst6.sin6_addr;
1048 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1049 return (EINVAL); /* XXX: should be impossible */
1051 if (dst6.sin6_scope_id != 0) {
1052 if (dst6.sin6_scope_id != zoneid)
1054 } else /* user omit to specify the ID. */
1055 dst6.sin6_scope_id = zoneid;
1057 /* convert into the internal form */
1058 if (sa6_embedscope(&dst6, 0))
1059 return (EINVAL); /* XXX: should be impossible */
1062 * The destination address can be specified only for a p2p or a
1063 * loopback interface. If specified, the corresponding prefix length
1066 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1067 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1068 /* XXX: noisy message */
1069 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1070 "be specified for a p2p or a loopback IF only\n"));
1074 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1075 "be 128 when dstaddr is specified\n"));
1079 /* lifetime consistency check */
1080 lt = &ifra->ifra_lifetime;
1081 if (lt->ia6t_pltime > lt->ia6t_vltime)
1083 if (lt->ia6t_vltime == 0) {
1085 * the following log might be noisy, but this is a typical
1086 * configuration mistake or a tool's bug.
1089 "in6_update_ifa: valid lifetime is 0 for %s\n",
1090 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1093 return (0); /* there's nothing to do */
1097 * If this is a new address, allocate a new ifaddr and link it
1103 * When in6_update_ifa() is called in a process of a received
1104 * RA, it is called under an interrupt context. So, we should
1105 * call malloc with M_NOWAIT.
1107 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
1111 bzero((caddr_t)ia, sizeof(*ia));
1112 ifa_init(&ia->ia_ifa);
1113 LIST_INIT(&ia->ia6_memberships);
1114 /* Initialize the address and masks, and put time stamp */
1115 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1116 ia->ia_addr.sin6_family = AF_INET6;
1117 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1118 ia->ia6_createtime = time_second;
1119 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1121 * XXX: some functions expect that ifa_dstaddr is not
1122 * NULL for p2p interfaces.
1124 ia->ia_ifa.ifa_dstaddr =
1125 (struct sockaddr *)&ia->ia_dstaddr;
1127 ia->ia_ifa.ifa_dstaddr = NULL;
1129 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1131 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1133 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1134 IF_ADDR_WUNLOCK(ifp);
1136 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1138 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1139 IN6_IFADDR_WUNLOCK();
1142 /* update timestamp */
1143 ia->ia6_updatetime = time_second;
1145 /* set prefix mask */
1146 if (ifra->ifra_prefixmask.sin6_len) {
1148 * We prohibit changing the prefix length of an existing
1150 * + such an operation should be rare in IPv6, and
1151 * + the operation would confuse prefix management.
1153 if (ia->ia_prefixmask.sin6_len &&
1154 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1155 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1156 " existing (%s) address should not be changed\n",
1157 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1161 ia->ia_prefixmask = ifra->ifra_prefixmask;
1165 * If a new destination address is specified, scrub the old one and
1166 * install the new destination. Note that the interface must be
1167 * p2p or loopback (see the check above.)
1169 if (dst6.sin6_family == AF_INET6 &&
1170 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1173 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1174 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1175 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1176 "a route to the old destination: %s\n",
1177 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1178 /* proceed anyway... */
1180 ia->ia_flags &= ~IFA_ROUTE;
1181 ia->ia_dstaddr = dst6;
1185 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1186 * to see if the address is deprecated or invalidated, but initialize
1187 * these members for applications.
1189 ia->ia6_lifetime = ifra->ifra_lifetime;
1190 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1191 ia->ia6_lifetime.ia6t_expire =
1192 time_second + ia->ia6_lifetime.ia6t_vltime;
1194 ia->ia6_lifetime.ia6t_expire = 0;
1195 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1196 ia->ia6_lifetime.ia6t_preferred =
1197 time_second + ia->ia6_lifetime.ia6t_pltime;
1199 ia->ia6_lifetime.ia6t_preferred = 0;
1201 /* reset the interface and routing table appropriately. */
1202 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1206 * configure address flags.
1208 ia->ia6_flags = ifra->ifra_flags;
1210 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1211 * userland, make it deprecated.
1213 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1214 ia->ia6_lifetime.ia6t_pltime = 0;
1215 ia->ia6_lifetime.ia6t_preferred = time_second;
1218 * Make the address tentative before joining multicast addresses,
1219 * so that corresponding MLD responses would not have a tentative
1222 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1223 if (hostIsNew && in6if_do_dad(ifp))
1224 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1226 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1227 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1228 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1231 * We are done if we have simply modified an existing address.
1237 * Beyond this point, we should call in6_purgeaddr upon an error,
1238 * not just go to unlink.
1241 /* Join necessary multicast groups. */
1243 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1244 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1250 * Perform DAD, if needed.
1251 * XXX It may be of use, if we can administratively disable DAD.
1253 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1254 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1256 int mindelay, maxdelay;
1259 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1261 * We need to impose a delay before sending an NS
1262 * for DAD. Check if we also needed a delay for the
1263 * corresponding MLD message. If we did, the delay
1264 * should be larger than the MLD delay (this could be
1265 * relaxed a bit, but this simple logic is at least
1267 * XXX: Break data hiding guidelines and look at
1268 * state for the solicited multicast group.
1271 if (in6m_sol != NULL &&
1272 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1273 mindelay = in6m_sol->in6m_timer;
1275 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1276 if (maxdelay - mindelay == 0)
1280 (arc4random() % (maxdelay - mindelay)) +
1284 nd6_dad_start((struct ifaddr *)ia, delay);
1287 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1288 ifa_free(&ia->ia_ifa);
1293 * XXX: if a change of an existing address failed, keep the entry
1297 in6_unlink_ifa(ia, ifp);
1298 ifa_free(&ia->ia_ifa);
1303 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1304 ifa_free(&ia->ia_ifa);
1305 in6_purgeaddr(&ia->ia_ifa);
1310 * Leave multicast groups. Factored out from in6_purgeaddr().
1311 * This entire work should only be done once, for the default FIB.
1314 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1316 struct sockaddr_in6 mltaddr, mltmask;
1317 struct in6_multi_mship *imm;
1319 struct sockaddr_in6 sin6;
1323 * Leave from multicast groups we have joined for the interface.
1325 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1326 LIST_REMOVE(imm, i6mm_chain);
1327 in6_leavegroup(imm);
1331 * Remove the link-local all-nodes address.
1333 bzero(&mltmask, sizeof(mltmask));
1334 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1335 mltmask.sin6_family = AF_INET6;
1336 mltmask.sin6_addr = in6mask32;
1338 bzero(&mltaddr, sizeof(mltaddr));
1339 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1340 mltaddr.sin6_family = AF_INET6;
1341 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1343 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1347 * As for the mltaddr above, proactively prepare the sin6 to avoid
1348 * rtentry un- and re-locking.
1351 bzero(&sin6, sizeof(sin6));
1352 sin6.sin6_len = sizeof(sin6);
1353 sin6.sin6_family = AF_INET6;
1354 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1355 sizeof(sin6.sin6_addr));
1356 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1361 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1362 if (rt != NULL && rt->rt_gateway != NULL &&
1363 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1364 &ia->ia_addr.sin6_addr,
1365 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1367 * If no more IPv6 address exists on this interface then
1368 * remove the multicast address route.
1371 memcpy(&mltaddr.sin6_addr,
1372 &satosin6(rt_key(rt))->sin6_addr,
1373 sizeof(mltaddr.sin6_addr));
1375 error = in6_rtrequest(RTM_DELETE,
1376 (struct sockaddr *)&mltaddr,
1377 (struct sockaddr *)&ia->ia_addr,
1378 (struct sockaddr *)&mltmask, RTF_UP,
1379 (struct rtentry **)0, RT_DEFAULT_FIB);
1381 log(LOG_INFO, "%s: link-local all-nodes "
1382 "multicast address deletion error\n",
1386 * Replace the gateway of the route.
1388 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1397 * Remove the node-local all-nodes address.
1399 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1400 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1403 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1404 if (rt != NULL && rt->rt_gateway != NULL &&
1405 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1406 &ia->ia_addr.sin6_addr,
1407 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1409 * If no more IPv6 address exists on this interface then
1410 * remove the multicast address route.
1413 memcpy(&mltaddr.sin6_addr,
1414 &satosin6(rt_key(rt))->sin6_addr,
1415 sizeof(mltaddr.sin6_addr));
1418 error = in6_rtrequest(RTM_DELETE,
1419 (struct sockaddr *)&mltaddr,
1420 (struct sockaddr *)&ia->ia_addr,
1421 (struct sockaddr *)&mltmask, RTF_UP,
1422 (struct rtentry **)0, RT_DEFAULT_FIB);
1424 log(LOG_INFO, "%s: node-local all-nodes"
1425 "multicast address deletion error\n",
1429 * Replace the gateway of the route.
1431 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1443 in6_purgeaddr(struct ifaddr *ifa)
1445 struct ifnet *ifp = ifa->ifa_ifp;
1446 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1448 struct ifaddr *ifa0;
1451 * find another IPv6 address as the gateway for the
1452 * link-local and node-local all-nodes multicast
1456 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1457 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1458 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1459 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1466 IF_ADDR_RUNLOCK(ifp);
1469 * Remove the loopback route to the interface address.
1470 * The check for the current setting of "nd6_useloopback"
1473 if (ia->ia_flags & IFA_RTSELF) {
1474 error = ifa_del_loopback_route((struct ifaddr *)ia,
1475 (struct sockaddr *)&ia->ia_addr);
1477 ia->ia_flags &= ~IFA_RTSELF;
1480 /* stop DAD processing */
1483 /* Remove local address entry from lltable. */
1486 /* Leave multicast groups. */
1487 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1492 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1493 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1494 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1495 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1497 log(LOG_INFO, "%s: err=%d, destination address delete "
1498 "failed\n", __func__, error);
1499 ia->ia_flags &= ~IFA_ROUTE;
1502 in6_unlink_ifa(ia, ifp);
1506 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1511 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1512 IF_ADDR_WUNLOCK(ifp);
1513 ifa_free(&ia->ia_ifa); /* if_addrhead */
1516 * Defer the release of what might be the last reference to the
1517 * in6_ifaddr so that it can't be freed before the remainder of the
1521 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1522 IN6_IFADDR_WUNLOCK();
1525 * Release the reference to the base prefix. There should be a
1526 * positive reference.
1528 if (ia->ia6_ndpr == NULL) {
1530 "in6_unlink_ifa: autoconf'ed address "
1531 "%p has no prefix\n", ia));
1533 ia->ia6_ndpr->ndpr_refcnt--;
1534 ia->ia6_ndpr = NULL;
1538 * Also, if the address being removed is autoconf'ed, call
1539 * pfxlist_onlink_check() since the release might affect the status of
1540 * other (detached) addresses.
1542 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1543 pfxlist_onlink_check();
1545 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1550 in6_purgeif(struct ifnet *ifp)
1552 struct ifaddr *ifa, *nifa;
1554 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1555 if (ifa->ifa_addr->sa_family != AF_INET6)
1565 * SIOCGLIFADDR: get first address. (?)
1566 * SIOCGLIFADDR with IFLR_PREFIX:
1567 * get first address that matches the specified prefix.
1568 * SIOCALIFADDR: add the specified address.
1569 * SIOCALIFADDR with IFLR_PREFIX:
1570 * add the specified prefix, filling hostid part from
1571 * the first link-local address. prefixlen must be <= 64.
1572 * SIOCDLIFADDR: delete the specified address.
1573 * SIOCDLIFADDR with IFLR_PREFIX:
1574 * delete the first address that matches the specified prefix.
1576 * EINVAL on invalid parameters
1577 * EADDRNOTAVAIL on prefix match failed/specified address not found
1578 * other values may be returned from in6_ioctl()
1580 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1581 * this is to accomodate address naming scheme other than RFC2374,
1583 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1584 * address encoding scheme. (see figure on page 8)
1587 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1588 struct ifnet *ifp, struct thread *td)
1590 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1592 struct sockaddr *sa;
1595 if (!data || !ifp) {
1596 panic("invalid argument to in6_lifaddr_ioctl");
1602 /* address must be specified on GET with IFLR_PREFIX */
1603 if ((iflr->flags & IFLR_PREFIX) == 0)
1608 /* address must be specified on ADD and DELETE */
1609 sa = (struct sockaddr *)&iflr->addr;
1610 if (sa->sa_family != AF_INET6)
1612 if (sa->sa_len != sizeof(struct sockaddr_in6))
1614 /* XXX need improvement */
1615 sa = (struct sockaddr *)&iflr->dstaddr;
1616 if (sa->sa_family && sa->sa_family != AF_INET6)
1618 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1621 default: /* shouldn't happen */
1623 panic("invalid cmd to in6_lifaddr_ioctl");
1629 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1635 struct in6_aliasreq ifra;
1636 struct in6_addr *hostid = NULL;
1640 if ((iflr->flags & IFLR_PREFIX) != 0) {
1641 struct sockaddr_in6 *sin6;
1644 * hostid is to fill in the hostid part of the
1645 * address. hostid points to the first link-local
1646 * address attached to the interface.
1648 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1650 return EADDRNOTAVAIL;
1651 hostid = IFA_IN6(ifa);
1653 /* prefixlen must be <= 64. */
1654 if (64 < iflr->prefixlen) {
1659 prefixlen = iflr->prefixlen;
1661 /* hostid part must be zero. */
1662 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1663 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1664 sin6->sin6_addr.s6_addr32[3] != 0) {
1670 prefixlen = iflr->prefixlen;
1672 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1673 bzero(&ifra, sizeof(ifra));
1674 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1676 bcopy(&iflr->addr, &ifra.ifra_addr,
1677 ((struct sockaddr *)&iflr->addr)->sa_len);
1679 /* fill in hostid part */
1680 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1681 hostid->s6_addr32[2];
1682 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1683 hostid->s6_addr32[3];
1686 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1687 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1688 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1690 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1691 hostid->s6_addr32[2];
1692 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1693 hostid->s6_addr32[3];
1699 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1700 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1702 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1703 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1708 struct in6_ifaddr *ia;
1709 struct in6_addr mask, candidate, match;
1710 struct sockaddr_in6 *sin6;
1713 bzero(&mask, sizeof(mask));
1714 if (iflr->flags & IFLR_PREFIX) {
1715 /* lookup a prefix rather than address. */
1716 in6_prefixlen2mask(&mask, iflr->prefixlen);
1718 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1719 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1720 match.s6_addr32[0] &= mask.s6_addr32[0];
1721 match.s6_addr32[1] &= mask.s6_addr32[1];
1722 match.s6_addr32[2] &= mask.s6_addr32[2];
1723 match.s6_addr32[3] &= mask.s6_addr32[3];
1725 /* if you set extra bits, that's wrong */
1726 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1731 if (cmd == SIOCGLIFADDR) {
1732 /* on getting an address, take the 1st match */
1735 /* on deleting an address, do exact match */
1736 in6_prefixlen2mask(&mask, 128);
1737 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1738 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1745 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1746 if (ifa->ifa_addr->sa_family != AF_INET6)
1752 * XXX: this is adhoc, but is necessary to allow
1753 * a user to specify fe80::/64 (not /10) for a
1754 * link-local address.
1756 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1757 in6_clearscope(&candidate);
1758 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1759 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1760 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1761 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1762 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1767 IF_ADDR_RUNLOCK(ifp);
1769 return EADDRNOTAVAIL;
1772 if (cmd == SIOCGLIFADDR) {
1775 /* fill in the if_laddrreq structure */
1776 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1777 error = sa6_recoverscope(
1778 (struct sockaddr_in6 *)&iflr->addr);
1784 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1785 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1786 ia->ia_dstaddr.sin6_len);
1787 error = sa6_recoverscope(
1788 (struct sockaddr_in6 *)&iflr->dstaddr);
1794 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1797 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1799 iflr->flags = ia->ia6_flags; /* XXX */
1804 struct in6_aliasreq ifra;
1806 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1807 bzero(&ifra, sizeof(ifra));
1808 bcopy(iflr->iflr_name, ifra.ifra_name,
1809 sizeof(ifra.ifra_name));
1811 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1812 ia->ia_addr.sin6_len);
1813 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1814 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1815 ia->ia_dstaddr.sin6_len);
1817 bzero(&ifra.ifra_dstaddr,
1818 sizeof(ifra.ifra_dstaddr));
1820 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1821 ia->ia_prefixmask.sin6_len);
1823 ifra.ifra_flags = ia->ia6_flags;
1825 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1831 return EOPNOTSUPP; /* just for safety */
1835 * Initialize an interface's IPv6 address and routing table entry.
1838 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1839 struct sockaddr_in6 *sin6, int newhost)
1841 int error = 0, plen, ifacount = 0;
1846 * Give the interface a chance to initialize
1847 * if this is its first address,
1848 * and to validate the address if necessary.
1851 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1852 if (ifa->ifa_addr->sa_family != AF_INET6)
1856 IF_ADDR_RUNLOCK(ifp);
1858 ia->ia_addr = *sin6;
1860 if (ifacount <= 1 && ifp->if_ioctl) {
1861 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1869 ia->ia_ifa.ifa_metric = ifp->if_metric;
1871 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1875 * If a new destination address is specified for a point-to-point
1876 * interface, install a route to the destination as an interface
1878 * XXX: the logic below rejects assigning multiple addresses on a p2p
1879 * interface that share the same destination.
1881 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1882 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1883 ia->ia_dstaddr.sin6_family == AF_INET6) {
1884 int rtflags = RTF_UP | RTF_HOST;
1885 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1888 ia->ia_flags |= IFA_ROUTE;
1890 * Handle the case for ::1 .
1892 if (ifp->if_flags & IFF_LOOPBACK)
1893 ia->ia_flags |= IFA_RTSELF;
1897 * add a loopback route to self
1899 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1900 error = ifa_add_loopback_route((struct ifaddr *)ia,
1901 (struct sockaddr *)&ia->ia_addr);
1903 ia->ia_flags |= IFA_RTSELF;
1906 /* Add local address to lltable, if necessary (ex. on p2p link). */
1908 in6_ifaddloop(&(ia->ia_ifa));
1914 * Find an IPv6 interface link-local address specific to an interface.
1915 * ifaddr is returned referenced.
1918 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1923 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1924 if (ifa->ifa_addr->sa_family != AF_INET6)
1926 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1927 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1934 IF_ADDR_RUNLOCK(ifp);
1936 return ((struct in6_ifaddr *)ifa);
1941 * find the internet address corresponding to a given interface and address.
1942 * ifaddr is returned referenced.
1945 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1950 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1951 if (ifa->ifa_addr->sa_family != AF_INET6)
1953 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1958 IF_ADDR_RUNLOCK(ifp);
1960 return ((struct in6_ifaddr *)ifa);
1964 * Find a link-local scoped address on ifp and return it if any.
1967 in6ifa_llaonifp(struct ifnet *ifp)
1969 struct sockaddr_in6 *sin6;
1972 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1975 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1976 if (ifa->ifa_addr->sa_family != AF_INET6)
1978 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1979 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1980 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1981 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1984 if_addr_runlock(ifp);
1986 return ((struct in6_ifaddr *)ifa);
1990 * Convert IP6 address to printable (loggable) representation. Caller
1991 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1993 static char digits[] = "0123456789abcdef";
1995 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1997 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1999 const u_int16_t *a = (const u_int16_t *)addr;
2001 int dcolon = 0, zero = 0;
2005 for (i = 0; i < 8; i++) {
2006 if (*(a + i) == 0) {
2011 else if (maxcnt < cnt) {
2022 for (i = 0; i < 8; i++) {
2033 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
2045 d = (const u_char *)a;
2046 /* Try to eliminate leading zeros in printout like in :0001. */
2048 *cp = digits[*d >> 4];
2053 *cp = digits[*d++ & 0xf];
2054 if (zero == 0 || (*cp != '0')) {
2058 *cp = digits[*d >> 4];
2059 if (zero == 0 || (*cp != '0')) {
2063 *cp++ = digits[*d & 0xf];
2072 in6_localaddr(struct in6_addr *in6)
2074 struct in6_ifaddr *ia;
2076 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2080 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2081 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2082 &ia->ia_prefixmask.sin6_addr)) {
2083 IN6_IFADDR_RUNLOCK();
2087 IN6_IFADDR_RUNLOCK();
2093 * Return 1 if an internet address is for the local host and configured
2094 * on one of its interfaces.
2097 in6_localip(struct in6_addr *in6)
2099 struct in6_ifaddr *ia;
2102 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2103 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2104 IN6_IFADDR_RUNLOCK();
2108 IN6_IFADDR_RUNLOCK();
2114 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2116 struct in6_ifaddr *ia;
2119 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2120 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
2122 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) {
2123 IN6_IFADDR_RUNLOCK();
2124 return (1); /* true */
2127 /* XXX: do we still have to go thru the rest of the list? */
2129 IN6_IFADDR_RUNLOCK();
2131 return (0); /* false */
2135 * return length of part which dst and src are equal
2139 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2142 u_char *s = (u_char *)src, *d = (u_char *)dst;
2143 u_char *lim = s + 16, r;
2146 if ((r = (*d++ ^ *s++)) != 0) {
2157 /* XXX: to be scope conscious */
2159 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2161 int bytelen, bitlen;
2164 if (0 > len || len > 128) {
2165 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2173 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2176 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2177 p2->s6_addr[bytelen] >> (8 - bitlen))
2184 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2186 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2187 int bytelen, bitlen, i;
2190 if (0 > len || len > 128) {
2191 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2196 bzero(maskp, sizeof(*maskp));
2199 for (i = 0; i < bytelen; i++)
2200 maskp->s6_addr[i] = 0xff;
2202 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2206 * return the best address out of the same scope. if no address was
2207 * found, return the first valid address from designated IF.
2210 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2212 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2214 struct in6_ifaddr *besta = 0;
2215 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2217 dep[0] = dep[1] = NULL;
2220 * We first look for addresses in the same scope.
2221 * If there is one, return it.
2222 * If two or more, return one which matches the dst longest.
2223 * If none, return one of global addresses assigned other ifs.
2226 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2227 if (ifa->ifa_addr->sa_family != AF_INET6)
2229 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2230 continue; /* XXX: is there any case to allow anycast? */
2231 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2232 continue; /* don't use this interface */
2233 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2235 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2236 if (V_ip6_use_deprecated)
2237 dep[0] = (struct in6_ifaddr *)ifa;
2241 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2243 * call in6_matchlen() as few as possible
2247 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2248 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2251 besta = (struct in6_ifaddr *)ifa;
2254 besta = (struct in6_ifaddr *)ifa;
2258 ifa_ref(&besta->ia_ifa);
2259 IF_ADDR_RUNLOCK(ifp);
2263 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2264 if (ifa->ifa_addr->sa_family != AF_INET6)
2266 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2267 continue; /* XXX: is there any case to allow anycast? */
2268 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2269 continue; /* don't use this interface */
2270 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2272 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2273 if (V_ip6_use_deprecated)
2274 dep[1] = (struct in6_ifaddr *)ifa;
2280 IF_ADDR_RUNLOCK(ifp);
2281 return (struct in6_ifaddr *)ifa;
2284 /* use the last-resort values, that are, deprecated addresses */
2286 ifa_ref((struct ifaddr *)dep[0]);
2287 IF_ADDR_RUNLOCK(ifp);
2291 ifa_ref((struct ifaddr *)dep[1]);
2292 IF_ADDR_RUNLOCK(ifp);
2296 IF_ADDR_RUNLOCK(ifp);
2301 * perform DAD when interface becomes IFF_UP.
2304 in6_if_up(struct ifnet *ifp)
2307 struct in6_ifaddr *ia;
2310 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2311 if (ifa->ifa_addr->sa_family != AF_INET6)
2313 ia = (struct in6_ifaddr *)ifa;
2314 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2316 * The TENTATIVE flag was likely set by hand
2317 * beforehand, implicitly indicating the need for DAD.
2318 * We may be able to skip the random delay in this
2319 * case, but we impose delays just in case.
2322 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2325 IF_ADDR_RUNLOCK(ifp);
2328 * special cases, like 6to4, are handled in in6_ifattach
2330 in6_ifattach(ifp, NULL);
2334 in6if_do_dad(struct ifnet *ifp)
2336 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2339 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2342 switch (ifp->if_type) {
2348 * These interfaces do not have the IFF_LOOPBACK flag,
2349 * but loop packets back. We do not have to do DAD on such
2350 * interfaces. We should even omit it, because loop-backed
2351 * NS would confuse the DAD procedure.
2356 * Our DAD routine requires the interface up and running.
2357 * However, some interfaces can be up before the RUNNING
2358 * status. Additionaly, users may try to assign addresses
2359 * before the interface becomes up (or running).
2360 * We simply skip DAD in such a case as a work around.
2361 * XXX: we should rather mark "tentative" on such addresses,
2362 * and do DAD after the interface becomes ready.
2364 if (!((ifp->if_flags & IFF_UP) &&
2365 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2373 * Calculate max IPv6 MTU through all the interfaces and store it
2379 unsigned long maxmtu = 0;
2382 IFNET_RLOCK_NOSLEEP();
2383 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2384 /* this function can be called during ifnet initialization */
2385 if (!ifp->if_afdata[AF_INET6])
2387 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2388 IN6_LINKMTU(ifp) > maxmtu)
2389 maxmtu = IN6_LINKMTU(ifp);
2391 IFNET_RUNLOCK_NOSLEEP();
2392 if (maxmtu) /* update only when maxmtu is positive */
2393 V_in6_maxmtu = maxmtu;
2397 * Provide the length of interface identifiers to be used for the link attached
2398 * to the given interface. The length should be defined in "IPv6 over
2399 * xxx-link" document. Note that address architecture might also define
2400 * the length for a particular set of address prefixes, regardless of the
2401 * link type. As clarified in rfc2462bis, those two definitions should be
2402 * consistent, and those really are as of August 2004.
2405 in6_if2idlen(struct ifnet *ifp)
2407 switch (ifp->if_type) {
2408 case IFT_ETHER: /* RFC2464 */
2409 #ifdef IFT_PROPVIRTUAL
2410 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2413 case IFT_L2VLAN: /* ditto */
2415 #ifdef IFT_IEEE80211
2416 case IFT_IEEE80211: /* ditto */
2419 case IFT_MIP: /* ditto */
2421 case IFT_INFINIBAND:
2423 case IFT_FDDI: /* RFC2467 */
2425 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2427 case IFT_PPP: /* RFC2472 */
2429 case IFT_ARCNET: /* RFC2497 */
2431 case IFT_FRELAY: /* RFC2590 */
2433 case IFT_IEEE1394: /* RFC3146 */
2436 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2438 return (64); /* XXX: is this really correct? */
2441 * Unknown link type:
2442 * It might be controversial to use the today's common constant
2443 * of 64 for these cases unconditionally. For full compliance,
2444 * we should return an error in this case. On the other hand,
2445 * if we simply miss the standard for the link type or a new
2446 * standard is defined for a new link type, the IFID length
2447 * is very likely to be the common constant. As a compromise,
2448 * we always use the constant, but make an explicit notice
2449 * indicating the "unknown" case.
2451 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2456 #include <sys/sysctl.h>
2458 struct in6_llentry {
2459 struct llentry base;
2460 struct sockaddr_in6 l3_addr6;
2464 * Deletes an address from the address table.
2465 * This function is called by the timer functions
2466 * such as arptimer() and nd6_llinfo_timer(), and
2467 * the caller does the locking.
2470 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2473 LLE_LOCK_DESTROY(lle);
2474 free(lle, M_LLTABLE);
2477 static struct llentry *
2478 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2480 struct in6_llentry *lle;
2482 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2483 if (lle == NULL) /* NB: caller generates msg */
2486 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2487 lle->base.lle_refcnt = 1;
2488 lle->base.lle_free = in6_lltable_free;
2489 LLE_LOCK_INIT(&lle->base);
2490 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2491 CALLOUT_RETURNUNLOCKED);
2493 return (&lle->base);
2497 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2498 const struct sockaddr *mask, u_int flags)
2500 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2501 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2502 struct llentry *lle, *next;
2506 * (flags & LLE_STATIC) means deleting all entries
2507 * including static ND6 entries.
2509 IF_AFDATA_WLOCK(llt->llt_ifp);
2510 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2511 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2512 if (IN6_ARE_MASKED_ADDR_EQUAL(
2513 &satosin6(L3_ADDR(lle))->sin6_addr,
2514 &pfx->sin6_addr, &msk->sin6_addr) &&
2515 ((flags & LLE_STATIC) ||
2516 !(lle->la_flags & LLE_STATIC))) {
2518 if (callout_stop(&lle->la_timer))
2524 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2528 in6_lltable_rtcheck(struct ifnet *ifp,
2530 const struct sockaddr *l3addr)
2533 char ip6buf[INET6_ADDRSTRLEN];
2535 KASSERT(l3addr->sa_family == AF_INET6,
2536 ("sin_family %d", l3addr->sa_family));
2538 /* Our local addresses are always only installed on the default FIB. */
2539 /* XXX rtalloc1 should take a const param */
2540 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2542 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2545 * Create an ND6 cache for an IPv6 neighbor
2546 * that is not covered by our own prefix.
2548 /* XXX ifaof_ifpforaddr should take a const param */
2549 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2556 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2557 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2566 static struct llentry *
2567 in6_lltable_lookup(struct lltable *llt, u_int flags,
2568 const struct sockaddr *l3addr)
2570 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2571 struct ifnet *ifp = llt->llt_ifp;
2572 struct llentry *lle;
2573 struct llentries *lleh;
2576 IF_AFDATA_LOCK_ASSERT(ifp);
2577 KASSERT(l3addr->sa_family == AF_INET6,
2578 ("sin_family %d", l3addr->sa_family));
2580 hashkey = sin6->sin6_addr.s6_addr32[3];
2581 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2582 LIST_FOREACH(lle, lleh, lle_next) {
2583 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2584 if (lle->la_flags & LLE_DELETED)
2586 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2587 sizeof(struct in6_addr)) == 0)
2592 if (!(flags & LLE_CREATE))
2595 * A route that covers the given address must have
2596 * been installed 1st because we are doing a resolution,
2599 if (!(flags & LLE_IFADDR) &&
2600 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2603 lle = in6_lltable_new(l3addr, flags);
2605 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2608 lle->la_flags = flags & ~LLE_CREATE;
2609 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2610 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2611 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2615 lle->lle_head = lleh;
2616 lle->la_flags |= LLE_LINKED;
2617 LIST_INSERT_HEAD(lleh, lle, lle_next);
2618 } else if (flags & LLE_DELETE) {
2619 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2621 lle->la_flags |= LLE_DELETED;
2623 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2625 if ((lle->la_flags &
2626 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2633 if (LLE_IS_VALID(lle)) {
2634 if (flags & LLE_EXCLUSIVE)
2643 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2645 struct ifnet *ifp = llt->llt_ifp;
2646 struct llentry *lle;
2649 struct rt_msghdr rtm;
2650 struct sockaddr_in6 sin6;
2652 * ndp.c assumes that sdl is word aligned
2657 struct sockaddr_dl sdl;
2661 if (ifp->if_flags & IFF_LOOPBACK)
2664 LLTABLE_LOCK_ASSERT();
2667 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2668 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2669 struct sockaddr_dl *sdl;
2671 /* skip deleted or invalid entries */
2672 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2674 /* Skip if jailed and not a valid IP of the prison. */
2675 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2678 * produce a msg made of:
2680 * struct sockaddr_in6 (IPv6)
2681 * struct sockaddr_dl;
2683 bzero(&ndpc, sizeof(ndpc));
2684 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2685 ndpc.rtm.rtm_version = RTM_VERSION;
2686 ndpc.rtm.rtm_type = RTM_GET;
2687 ndpc.rtm.rtm_flags = RTF_UP;
2688 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2689 ndpc.sin6.sin6_family = AF_INET6;
2690 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2691 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2694 if (lle->la_flags & LLE_PUB)
2695 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2698 sdl->sdl_family = AF_LINK;
2699 sdl->sdl_len = sizeof(*sdl);
2700 sdl->sdl_alen = ifp->if_addrlen;
2701 sdl->sdl_index = ifp->if_index;
2702 sdl->sdl_type = ifp->if_type;
2703 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2704 ndpc.rtm.rtm_rmx.rmx_expire =
2705 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2706 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2707 if (lle->la_flags & LLE_STATIC)
2708 ndpc.rtm.rtm_flags |= RTF_STATIC;
2709 ndpc.rtm.rtm_index = ifp->if_index;
2710 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2719 in6_domifattach(struct ifnet *ifp)
2721 struct in6_ifextra *ext;
2723 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2724 bzero(ext, sizeof(*ext));
2726 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2727 M_IFADDR, M_WAITOK);
2728 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2731 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2732 M_IFADDR, M_WAITOK);
2733 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2735 ext->nd_ifinfo = nd6_ifattach(ifp);
2736 ext->scope6_id = scope6_ifattach(ifp);
2737 ext->lltable = lltable_init(ifp, AF_INET6);
2738 if (ext->lltable != NULL) {
2739 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2740 ext->lltable->llt_lookup = in6_lltable_lookup;
2741 ext->lltable->llt_dump = in6_lltable_dump;
2744 ext->mld_ifinfo = mld_domifattach(ifp);
2750 in6_domifdetach(struct ifnet *ifp, void *aux)
2752 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2754 mld_domifdetach(ifp);
2755 scope6_ifdetach(ext->scope6_id);
2756 nd6_ifdetach(ext->nd_ifinfo);
2757 lltable_free(ext->lltable);
2758 free(ext->in6_ifstat, M_IFADDR);
2759 free(ext->icmp6_ifstat, M_IFADDR);
2760 free(ext, M_IFADDR);
2764 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2765 * v4 mapped addr or v4 compat addr
2768 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2771 bzero(sin, sizeof(*sin));
2772 sin->sin_len = sizeof(struct sockaddr_in);
2773 sin->sin_family = AF_INET;
2774 sin->sin_port = sin6->sin6_port;
2775 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2778 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2780 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2782 bzero(sin6, sizeof(*sin6));
2783 sin6->sin6_len = sizeof(struct sockaddr_in6);
2784 sin6->sin6_family = AF_INET6;
2785 sin6->sin6_port = sin->sin_port;
2786 sin6->sin6_addr.s6_addr32[0] = 0;
2787 sin6->sin6_addr.s6_addr32[1] = 0;
2788 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2789 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2792 /* Convert sockaddr_in6 into sockaddr_in. */
2794 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2796 struct sockaddr_in *sin_p;
2797 struct sockaddr_in6 sin6;
2800 * Save original sockaddr_in6 addr and convert it
2803 sin6 = *(struct sockaddr_in6 *)nam;
2804 sin_p = (struct sockaddr_in *)nam;
2805 in6_sin6_2_sin(sin_p, &sin6);
2808 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2810 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2812 struct sockaddr_in *sin_p;
2813 struct sockaddr_in6 *sin6_p;
2815 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2816 sin_p = (struct sockaddr_in *)*nam;
2817 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2818 free(*nam, M_SONAME);
2819 *nam = (struct sockaddr *)sin6_p;