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/eventhandler.h>
72 #include <sys/errno.h>
74 #include <sys/malloc.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/sockio.h>
78 #include <sys/systm.h>
82 #include <sys/kernel.h>
83 #include <sys/syslog.h>
86 #include <net/if_var.h>
87 #include <net/if_types.h>
88 #include <net/route.h>
89 #include <net/if_dl.h>
92 #include <netinet/in.h>
93 #include <netinet/in_var.h>
94 #include <net/if_llatbl.h>
95 #include <netinet/if_ether.h>
96 #include <netinet/in_systm.h>
97 #include <netinet/ip.h>
98 #include <netinet/in_pcb.h>
99 #include <netinet/ip_carp.h>
101 #include <netinet/ip6.h>
102 #include <netinet6/ip6_var.h>
103 #include <netinet6/nd6.h>
104 #include <netinet6/mld6_var.h>
105 #include <netinet6/ip6_mroute.h>
106 #include <netinet6/in6_ifattach.h>
107 #include <netinet6/scope6_var.h>
108 #include <netinet6/in6_pcb.h>
110 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
111 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
114 * Definitions of some costant IP6 addresses.
116 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
117 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
118 const struct in6_addr in6addr_nodelocal_allnodes =
119 IN6ADDR_NODELOCAL_ALLNODES_INIT;
120 const struct in6_addr in6addr_linklocal_allnodes =
121 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
122 const struct in6_addr in6addr_linklocal_allrouters =
123 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
124 const struct in6_addr in6addr_linklocal_allv2routers =
125 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
127 const struct in6_addr in6mask0 = IN6MASK0;
128 const struct in6_addr in6mask32 = IN6MASK32;
129 const struct in6_addr in6mask64 = IN6MASK64;
130 const struct in6_addr in6mask96 = IN6MASK96;
131 const struct in6_addr in6mask128 = IN6MASK128;
133 const struct sockaddr_in6 sa6_any =
134 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
136 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
137 struct in6_aliasreq *, int);
138 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
140 int (*faithprefix_p)(struct in6_addr *);
142 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
143 struct in6_ifaddr *, int);
144 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
145 struct in6_aliasreq *, int flags);
146 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
147 struct in6_ifaddr *, int, int);
148 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
149 struct in6_ifaddr *, int);
151 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
152 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
156 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
158 struct sockaddr_dl gateway;
159 struct sockaddr_in6 mask, addr;
163 * initialize for rtmsg generation
165 bzero(&gateway, sizeof(gateway));
166 gateway.sdl_len = sizeof(gateway);
167 gateway.sdl_family = AF_LINK;
169 bzero(&rt, sizeof(rt));
170 rt.rt_gateway = (struct sockaddr *)&gateway;
171 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
172 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
173 rt_mask(&rt) = (struct sockaddr *)&mask;
174 rt_key(&rt) = (struct sockaddr *)&addr;
175 rt.rt_flags = RTF_HOST | RTF_STATIC;
177 rt.rt_flags |= RTF_UP;
178 /* Announce arrival of local address to all FIBs. */
179 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt);
183 in6_mask2len(struct in6_addr *mask, u_char *lim0)
186 u_char *lim = lim0, *p;
188 /* ignore the scope_id part */
189 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
190 lim = (u_char *)mask + sizeof(*mask);
191 for (p = (u_char *)mask; p < lim; x++, p++) {
197 for (y = 0; y < 8; y++) {
198 if ((*p & (0x80 >> y)) == 0)
204 * when the limit pointer is given, do a stricter check on the
208 if (y != 0 && (*p & (0x00ff >> y)) != 0)
210 for (p = p + 1; p < lim; p++)
218 #ifdef COMPAT_FREEBSD32
219 struct in6_ndifreq32 {
220 char ifname[IFNAMSIZ];
223 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
227 in6_control(struct socket *so, u_long cmd, caddr_t data,
228 struct ifnet *ifp, struct thread *td)
230 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
231 struct in6_ifaddr *ia = NULL;
232 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
233 struct sockaddr_in6 *sa6;
234 int carp_attached = 0;
239 * Compat to make pre-10.x ifconfig(8) operable.
241 if (cmd == OSIOCAIFADDR_IN6)
242 cmd = SIOCAIFADDR_IN6;
245 case SIOCGETSGCNT_IN6:
246 case SIOCGETMIFCNT_IN6:
248 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
249 * We cannot see how that would be needed, so do not adjust the
250 * KPI blindly; more likely should clean up the IPv4 variant.
252 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
256 case SIOCAADDRCTL_POLICY:
257 case SIOCDADDRCTL_POLICY:
259 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
263 return (in6_src_ioctl(cmd, data));
270 case SIOCSNDFLUSH_IN6:
271 case SIOCSPFXFLUSH_IN6:
272 case SIOCSRTRFLUSH_IN6:
273 case SIOCSDEFIFACE_IN6:
274 case SIOCSIFINFO_FLAGS:
275 case SIOCSIFINFO_IN6:
277 error = priv_check(td, PRIV_NETINET_ND6);
282 case OSIOCGIFINFO_IN6:
283 case SIOCGIFINFO_IN6:
286 case SIOCGNBRINFO_IN6:
287 case SIOCGDEFIFACE_IN6:
288 return (nd6_ioctl(cmd, data, ifp));
290 #ifdef COMPAT_FREEBSD32
291 case SIOCGDEFIFACE32_IN6:
293 struct in6_ndifreq ndif;
294 struct in6_ndifreq32 *ndif32;
296 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
300 ndif32 = (struct in6_ndifreq32 *)data;
301 ndif32->ifindex = ndif.ifindex;
308 case SIOCSIFPREFIX_IN6:
309 case SIOCDIFPREFIX_IN6:
310 case SIOCAIFPREFIX_IN6:
311 case SIOCCIFPREFIX_IN6:
312 case SIOCSGIFPREFIX_IN6:
313 case SIOCGIFPREFIX_IN6:
315 "prefix ioctls are now invalidated. "
316 "please use ifconfig.\n");
323 error = priv_check(td, PRIV_NETINET_SCOPE6);
330 return (scope6_ioctl(cmd, data, ifp));
334 * Find address for this interface, if it exists.
336 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
337 * only, and used the first interface address as the target of other
338 * operations (without checking ifra_addr). This was because netinet
339 * code/API assumed at most 1 interface address per interface.
340 * Since IPv6 allows a node to assign multiple addresses
341 * on a single interface, we almost always look and check the
342 * presence of ifra_addr, and reject invalid ones here.
343 * It also decreases duplicated code among SIOC*_IN6 operations.
346 case SIOCAIFADDR_IN6:
347 case SIOCSIFPHYADDR_IN6:
348 sa6 = &ifra->ifra_addr;
350 case SIOCSIFADDR_IN6:
351 case SIOCGIFADDR_IN6:
352 case SIOCSIFDSTADDR_IN6:
353 case SIOCSIFNETMASK_IN6:
354 case SIOCGIFDSTADDR_IN6:
355 case SIOCGIFNETMASK_IN6:
356 case SIOCDIFADDR_IN6:
357 case SIOCGIFPSRCADDR_IN6:
358 case SIOCGIFPDSTADDR_IN6:
359 case SIOCGIFAFLAG_IN6:
360 case SIOCSNDFLUSH_IN6:
361 case SIOCSPFXFLUSH_IN6:
362 case SIOCSRTRFLUSH_IN6:
363 case SIOCGIFALIFETIME_IN6:
364 case SIOCSIFALIFETIME_IN6:
365 case SIOCGIFSTAT_IN6:
366 case SIOCGIFSTAT_ICMP6:
367 sa6 = &ifr->ifr_addr;
374 * Although we should pass any non-INET6 ioctl requests
375 * down to driver, we filter some legacy INET requests.
376 * Drivers trust SIOCSIFADDR et al to come from an already
377 * privileged layer, and do not perform any credentials
378 * checks or input validation.
385 if (sa6 && sa6->sin6_family == AF_INET6) {
386 if (sa6->sin6_scope_id != 0)
387 error = sa6_embedscope(sa6, 0);
389 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
392 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
393 &sa6->sin6_addr)) != 0)
395 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
400 case SIOCSIFADDR_IN6:
401 case SIOCSIFDSTADDR_IN6:
402 case SIOCSIFNETMASK_IN6:
404 * Since IPv6 allows a node to assign multiple addresses
405 * on a single interface, SIOCSIFxxx ioctls are deprecated.
407 /* we decided to obsolete this command (20000704) */
411 case SIOCDIFADDR_IN6:
413 * for IPv4, we look for existing in_ifaddr here to allow
414 * "ifconfig if0 delete" to remove the first IPv4 address on
415 * the interface. For IPv6, as the spec allows multiple
416 * interface address from the day one, we consider "remove the
417 * first one" semantics to be not preferable.
420 error = EADDRNOTAVAIL;
424 case SIOCAIFADDR_IN6:
426 * We always require users to specify a valid IPv6 address for
427 * the corresponding operation.
429 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
430 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
431 error = EAFNOSUPPORT;
436 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
437 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
442 case SIOCGIFSTAT_IN6:
443 case SIOCGIFSTAT_ICMP6:
444 if (ifp->if_afdata[AF_INET6] == NULL) {
445 error = EPFNOSUPPORT;
450 case SIOCGIFADDR_IN6:
451 /* This interface is basically deprecated. use SIOCGIFCONF. */
453 case SIOCGIFAFLAG_IN6:
454 case SIOCGIFNETMASK_IN6:
455 case SIOCGIFDSTADDR_IN6:
456 case SIOCGIFALIFETIME_IN6:
457 /* must think again about its semantics */
459 error = EADDRNOTAVAIL;
464 case SIOCSIFALIFETIME_IN6:
466 struct in6_addrlifetime *lt;
469 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
474 error = EADDRNOTAVAIL;
477 /* sanity for overflow - beware unsigned */
478 lt = &ifr->ifr_ifru.ifru_lifetime;
479 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
480 lt->ia6t_vltime + time_uptime < time_uptime) {
484 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
485 lt->ia6t_pltime + time_uptime < time_uptime) {
494 case SIOCGIFADDR_IN6:
495 ifr->ifr_addr = ia->ia_addr;
496 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
500 case SIOCGIFDSTADDR_IN6:
501 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
506 * XXX: should we check if ifa_dstaddr is NULL and return
509 ifr->ifr_dstaddr = ia->ia_dstaddr;
510 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
514 case SIOCGIFNETMASK_IN6:
515 ifr->ifr_addr = ia->ia_prefixmask;
518 case SIOCGIFAFLAG_IN6:
519 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
522 case SIOCGIFSTAT_IN6:
523 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
524 ifp->if_afdata[AF_INET6])->in6_ifstat,
525 &ifr->ifr_ifru.ifru_stat,
526 sizeof(struct in6_ifstat) / sizeof(uint64_t));
529 case SIOCGIFSTAT_ICMP6:
530 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
531 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
532 &ifr->ifr_ifru.ifru_icmp6stat,
533 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
536 case SIOCGIFALIFETIME_IN6:
537 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
538 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
540 struct in6_addrlifetime *retlt =
541 &ifr->ifr_ifru.ifru_lifetime;
544 * XXX: adjust expiration time assuming time_t is
548 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
549 if (ia->ia6_lifetime.ia6t_vltime <
550 maxexpire - ia->ia6_updatetime) {
551 retlt->ia6t_expire = ia->ia6_updatetime +
552 ia->ia6_lifetime.ia6t_vltime;
554 retlt->ia6t_expire = maxexpire;
556 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
558 struct in6_addrlifetime *retlt =
559 &ifr->ifr_ifru.ifru_lifetime;
562 * XXX: adjust expiration time assuming time_t is
566 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
567 if (ia->ia6_lifetime.ia6t_pltime <
568 maxexpire - ia->ia6_updatetime) {
569 retlt->ia6t_preferred = ia->ia6_updatetime +
570 ia->ia6_lifetime.ia6t_pltime;
572 retlt->ia6t_preferred = maxexpire;
576 case SIOCSIFALIFETIME_IN6:
577 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
579 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
580 ia->ia6_lifetime.ia6t_expire =
581 time_uptime + ia->ia6_lifetime.ia6t_vltime;
583 ia->ia6_lifetime.ia6t_expire = 0;
584 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
585 ia->ia6_lifetime.ia6t_preferred =
586 time_uptime + ia->ia6_lifetime.ia6t_pltime;
588 ia->ia6_lifetime.ia6t_preferred = 0;
591 case SIOCAIFADDR_IN6:
593 struct nd_prefixctl pr0;
594 struct nd_prefix *pr;
597 * first, make or update the interface address structure,
598 * and link it to the list.
600 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
603 ifa_free(&ia->ia_ifa);
604 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
607 * this can happen when the user specify the 0 valid
613 if (cmd == ocmd && ifra->ifra_vhid > 0) {
614 if (carp_attach_p != NULL)
615 error = (*carp_attach_p)(&ia->ia_ifa,
618 error = EPROTONOSUPPORT;
626 * then, make the prefix on-link on the interface.
627 * XXX: we'd rather create the prefix before the address, but
628 * we need at least one address to install the corresponding
629 * interface route, so we configure the address first.
633 * convert mask to prefix length (prefixmask has already
634 * been validated in in6_update_ifa().
636 bzero(&pr0, sizeof(pr0));
638 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
640 if (pr0.ndpr_plen == 128) {
641 break; /* we don't need to install a host route. */
643 pr0.ndpr_prefix = ifra->ifra_addr;
644 /* apply the mask for safety. */
645 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
646 &ifra->ifra_prefixmask.sin6_addr);
649 * XXX: since we don't have an API to set prefix (not address)
650 * lifetimes, we just use the same lifetimes as addresses.
651 * The (temporarily) installed lifetimes can be overridden by
652 * later advertised RAs (when accept_rtadv is non 0), which is
653 * an intended behavior.
655 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
657 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
658 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
659 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
661 /* add the prefix if not yet. */
662 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
664 * nd6_prelist_add will install the corresponding
667 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
669 (*carp_detach_p)(&ia->ia_ifa);
674 (*carp_detach_p)(&ia->ia_ifa);
675 log(LOG_ERR, "nd6_prelist_add succeeded but "
682 /* relate the address to the prefix */
683 if (ia->ia6_ndpr == NULL) {
688 * If this is the first autoconf address from the
689 * prefix, create a temporary address as well
692 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
693 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
695 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
696 log(LOG_NOTICE, "in6_control: failed "
697 "to create a temporary address, "
704 * this might affect the status of autoconfigured addresses,
705 * that is, this address might make other addresses detached.
707 pfxlist_onlink_check();
708 if (error == 0 && ia) {
709 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
711 * Try to clear the flag when a new
712 * IPv6 address is added onto an
713 * IFDISABLED interface and it
716 struct in6_ndireq nd;
718 memset(&nd, 0, sizeof(nd));
719 nd.ndi.flags = ND_IFINFO(ifp)->flags;
720 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
721 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
722 (caddr_t)&nd, ifp) < 0)
723 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
724 "SIOCSIFINFO_FLAGS for -ifdisabled "
727 * Ignore failure of clearing the flag
728 * intentionally. The failure means
729 * address duplication was detected.
732 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
737 case SIOCDIFADDR_IN6:
739 struct nd_prefix *pr;
742 * If the address being deleted is the only one that owns
743 * the corresponding prefix, expire the prefix as well.
744 * XXX: theoretically, we don't have to worry about such
745 * relationship, since we separate the address management
746 * and the prefix management. We do this, however, to provide
747 * as much backward compatibility as possible in terms of
748 * the ioctl operation.
749 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
752 in6_purgeaddr(&ia->ia_ifa);
753 if (pr && pr->ndpr_refcnt == 0)
755 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
760 if (ifp->if_ioctl == NULL) {
764 error = (*ifp->if_ioctl)(ifp, cmd, data);
771 ifa_free(&ia->ia_ifa);
777 * Join necessary multicast groups. Factored out from in6_update_ifa().
778 * This entire work should only be done once, for the default FIB.
781 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
782 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
784 char ip6buf[INET6_ADDRSTRLEN];
785 struct sockaddr_in6 mltaddr, mltmask;
786 struct in6_addr llsol;
787 struct in6_multi_mship *imm;
791 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
793 /* Join solicited multicast addr for new host id. */
794 bzero(&llsol, sizeof(struct in6_addr));
795 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
796 llsol.s6_addr32[1] = 0;
797 llsol.s6_addr32[2] = htonl(1);
798 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
799 llsol.s6_addr8[12] = 0xff;
800 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
801 /* XXX: should not happen */
802 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
806 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
808 * We need a random delay for DAD on the address being
809 * configured. It also means delaying transmission of the
810 * corresponding MLD report to avoid report collision.
811 * [RFC 4861, Section 6.3.7]
813 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
815 imm = in6_joingroup(ifp, &llsol, &error, delay);
817 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
818 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
819 if_name(ifp), error));
822 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
823 *in6m_sol = imm->i6mm_maddr;
825 bzero(&mltmask, sizeof(mltmask));
826 mltmask.sin6_len = sizeof(struct sockaddr_in6);
827 mltmask.sin6_family = AF_INET6;
828 mltmask.sin6_addr = in6mask32;
829 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
832 * Join link-local all-nodes address.
834 bzero(&mltaddr, sizeof(mltaddr));
835 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
836 mltaddr.sin6_family = AF_INET6;
837 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
838 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
839 goto cleanup; /* XXX: should not fail */
842 * XXX: do we really need this automatic routes? We should probably
843 * reconsider this stuff. Most applications actually do not need the
844 * routes, since they usually specify the outgoing interface.
846 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
848 /* XXX: only works in !SCOPEDROUTING case. */
849 if (memcmp(&mltaddr.sin6_addr,
850 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
857 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
858 (struct sockaddr *)&ia->ia_addr,
859 (struct sockaddr *)&mltmask, RTF_UP,
860 (struct rtentry **)0, RT_DEFAULT_FIB);
866 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
868 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
869 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
870 &mltaddr.sin6_addr), if_name(ifp), error));
873 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
876 * Join node information group address.
879 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
881 * The spec does not say anything about delay for this group,
882 * but the same logic should apply.
884 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
886 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
888 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
890 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
891 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
892 &mltaddr.sin6_addr), if_name(ifp), error));
893 /* XXX not very fatal, go on... */
895 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
897 if (V_icmp6_nodeinfo_oldmcprefix &&
898 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
899 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
901 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
902 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
903 &mltaddr.sin6_addr), if_name(ifp), error));
904 /* XXX not very fatal, go on... */
906 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
910 * Join interface-local all-nodes address.
911 * (ff01::1%ifN, and ff01::%ifN/32)
913 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
914 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
915 goto cleanup; /* XXX: should not fail */
916 /* XXX: again, do we really need the route? */
917 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
919 if (memcmp(&mltaddr.sin6_addr,
920 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
927 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
928 (struct sockaddr *)&ia->ia_addr,
929 (struct sockaddr *)&mltmask, RTF_UP,
930 (struct rtentry **)0, RT_DEFAULT_FIB);
936 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
938 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
939 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
940 &mltaddr.sin6_addr), if_name(ifp), error));
943 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
951 * Update parameters of an IPv6 interface address.
952 * If necessary, a new entry is created and linked into address chains.
953 * This function is separated from in6_control().
956 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
957 struct in6_ifaddr *ia, int flags)
959 int error, hostIsNew = 0;
961 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
966 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
970 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
972 if (hostIsNew != 0) {
973 in6_unlink_ifa(ia, ifp);
974 ifa_free(&ia->ia_ifa);
980 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
986 * Fill in basic IPv6 address request info.
989 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
990 const struct in6_addr *mask)
993 memset(ifra, 0, sizeof(struct in6_aliasreq));
995 ifra->ifra_addr.sin6_family = AF_INET6;
996 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
998 ifra->ifra_addr.sin6_addr = *addr;
1000 ifra->ifra_prefixmask.sin6_family = AF_INET6;
1001 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1003 ifra->ifra_prefixmask.sin6_addr = *mask;
1007 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
1008 struct in6_ifaddr *ia, int flags)
1011 struct sockaddr_in6 dst6;
1012 struct in6_addrlifetime *lt;
1013 char ip6buf[INET6_ADDRSTRLEN];
1015 /* Validate parameters */
1016 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1020 * The destination address for a p2p link must have a family
1021 * of AF_UNSPEC or AF_INET6.
1023 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1024 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1025 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1026 return (EAFNOSUPPORT);
1031 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
1032 ifra->ifra_addr.sin6_family != AF_INET6)
1036 * validate ifra_prefixmask. don't check sin6_family, netmask
1037 * does not carry fields other than sin6_len.
1039 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1042 * Because the IPv6 address architecture is classless, we require
1043 * users to specify a (non 0) prefix length (mask) for a new address.
1044 * We also require the prefix (when specified) mask is valid, and thus
1045 * reject a non-consecutive mask.
1047 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1049 if (ifra->ifra_prefixmask.sin6_len != 0) {
1050 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1051 (u_char *)&ifra->ifra_prefixmask +
1052 ifra->ifra_prefixmask.sin6_len);
1057 * In this case, ia must not be NULL. We just use its prefix
1060 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1063 * If the destination address on a p2p interface is specified,
1064 * and the address is a scoped one, validate/set the scope
1067 dst6 = ifra->ifra_dstaddr;
1068 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1069 (dst6.sin6_family == AF_INET6)) {
1070 struct in6_addr in6_tmp;
1073 in6_tmp = dst6.sin6_addr;
1074 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1075 return (EINVAL); /* XXX: should be impossible */
1077 if (dst6.sin6_scope_id != 0) {
1078 if (dst6.sin6_scope_id != zoneid)
1080 } else /* user omit to specify the ID. */
1081 dst6.sin6_scope_id = zoneid;
1083 /* convert into the internal form */
1084 if (sa6_embedscope(&dst6, 0))
1085 return (EINVAL); /* XXX: should be impossible */
1087 /* Modify original ifra_dstaddr to reflect changes */
1088 ifra->ifra_dstaddr = dst6;
1091 * The destination address can be specified only for a p2p or a
1092 * loopback interface. If specified, the corresponding prefix length
1095 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1096 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1097 /* XXX: noisy message */
1098 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1099 "be specified for a p2p or a loopback IF only\n"));
1103 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1104 "be 128 when dstaddr is specified\n"));
1108 /* lifetime consistency check */
1109 lt = &ifra->ifra_lifetime;
1110 if (lt->ia6t_pltime > lt->ia6t_vltime)
1112 if (lt->ia6t_vltime == 0) {
1114 * the following log might be noisy, but this is a typical
1115 * configuration mistake or a tool's bug.
1118 "in6_update_ifa: valid lifetime is 0 for %s\n",
1119 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1122 return (0); /* there's nothing to do */
1125 /* Check prefix mask */
1126 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1128 * We prohibit changing the prefix length of an existing
1130 * + such an operation should be rare in IPv6, and
1131 * + the operation would confuse prefix management.
1133 if (ia->ia_prefixmask.sin6_len != 0 &&
1134 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1135 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1136 "of an existing %s address should not be changed\n",
1137 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1148 * Allocate a new ifaddr and link it into chains.
1150 static struct in6_ifaddr *
1151 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1153 struct in6_ifaddr *ia;
1156 * When in6_alloc_ifa() is called in a process of a received
1157 * RA, it is called under an interrupt context. So, we should
1158 * call malloc with M_NOWAIT.
1160 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1163 LIST_INIT(&ia->ia6_memberships);
1164 /* Initialize the address and masks, and put time stamp */
1165 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1166 ia->ia_addr.sin6_family = AF_INET6;
1167 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1168 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1169 ia->ia_addr = ifra->ifra_addr;
1170 ia->ia6_createtime = time_uptime;
1171 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1173 * Some functions expect that ifa_dstaddr is not
1174 * NULL for p2p interfaces.
1176 ia->ia_ifa.ifa_dstaddr =
1177 (struct sockaddr *)&ia->ia_dstaddr;
1179 ia->ia_ifa.ifa_dstaddr = NULL;
1182 /* set prefix mask if any */
1183 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1184 if (ifra->ifra_prefixmask.sin6_len != 0) {
1185 ia->ia_prefixmask.sin6_family = AF_INET6;
1186 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1187 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1191 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1193 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1194 IF_ADDR_WUNLOCK(ifp);
1196 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1198 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1199 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1200 IN6_IFADDR_WUNLOCK();
1206 * Update/configure interface address parameters:
1208 * 1) Update lifetime
1209 * 2) Update interface metric ad flags
1210 * 3) Notify other subsystems
1213 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1214 struct in6_ifaddr *ia, int hostIsNew, int flags)
1218 /* update timestamp */
1219 ia->ia6_updatetime = time_uptime;
1222 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1223 * to see if the address is deprecated or invalidated, but initialize
1224 * these members for applications.
1226 ia->ia6_lifetime = ifra->ifra_lifetime;
1227 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1228 ia->ia6_lifetime.ia6t_expire =
1229 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1231 ia->ia6_lifetime.ia6t_expire = 0;
1232 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1233 ia->ia6_lifetime.ia6t_preferred =
1234 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1236 ia->ia6_lifetime.ia6t_preferred = 0;
1239 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1240 * userland, make it deprecated.
1242 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1243 ia->ia6_lifetime.ia6t_pltime = 0;
1244 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1248 * configure address flags.
1250 ia->ia6_flags = ifra->ifra_flags;
1253 * Make the address tentative before joining multicast addresses,
1254 * so that corresponding MLD responses would not have a tentative
1257 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1258 if (hostIsNew && in6if_do_dad(ifp))
1259 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1261 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1262 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1263 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1265 /* notify other subsystems */
1266 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1272 * Do link-level ifa job:
1273 * 1) Add lle entry for added address
1274 * 2) Notifies routing socket users about new address
1275 * 3) join appropriate multicast group
1276 * 4) start DAD if enabled
1279 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1280 struct in6_ifaddr *ia, int flags)
1282 struct in6_multi *in6m_sol;
1285 /* Add local address to lltable, if necessary (ex. on p2p link). */
1286 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1287 in6_purgeaddr(&ia->ia_ifa);
1288 ifa_free(&ia->ia_ifa);
1292 /* Join necessary multicast groups. */
1294 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1295 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1297 in6_purgeaddr(&ia->ia_ifa);
1298 ifa_free(&ia->ia_ifa);
1304 * Perform DAD, if needed.
1305 * XXX It may be of use, if we can administratively disable DAD.
1307 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1308 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1310 int delay, mindelay, maxdelay;
1313 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1315 * We need to impose a delay before sending an NS
1316 * for DAD. Check if we also needed a delay for the
1317 * corresponding MLD message. If we did, the delay
1318 * should be larger than the MLD delay (this could be
1319 * relaxed a bit, but this simple logic is at least
1321 * XXX: Break data hiding guidelines and look at
1322 * state for the solicited multicast group.
1325 if (in6m_sol != NULL &&
1326 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1327 mindelay = in6m_sol->in6m_timer;
1329 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1330 if (maxdelay - mindelay == 0)
1334 (arc4random() % (maxdelay - mindelay)) +
1338 nd6_dad_start((struct ifaddr *)ia, delay);
1341 ifa_free(&ia->ia_ifa);
1346 * Leave multicast groups. Factored out from in6_purgeaddr().
1347 * This entire work should only be done once, for the default FIB.
1350 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1352 struct sockaddr_in6 mltaddr, mltmask;
1353 struct in6_multi_mship *imm;
1355 struct sockaddr_in6 sin6;
1359 * Leave from multicast groups we have joined for the interface.
1361 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1362 LIST_REMOVE(imm, i6mm_chain);
1363 in6_leavegroup(imm);
1367 * Remove the link-local all-nodes address.
1369 bzero(&mltmask, sizeof(mltmask));
1370 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1371 mltmask.sin6_family = AF_INET6;
1372 mltmask.sin6_addr = in6mask32;
1374 bzero(&mltaddr, sizeof(mltaddr));
1375 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1376 mltaddr.sin6_family = AF_INET6;
1377 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1379 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1383 * As for the mltaddr above, proactively prepare the sin6 to avoid
1384 * rtentry un- and re-locking.
1387 bzero(&sin6, sizeof(sin6));
1388 sin6.sin6_len = sizeof(sin6);
1389 sin6.sin6_family = AF_INET6;
1390 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1391 sizeof(sin6.sin6_addr));
1392 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1397 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1398 if (rt != NULL && rt->rt_gateway != NULL &&
1399 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1400 &ia->ia_addr.sin6_addr,
1401 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1403 * If no more IPv6 address exists on this interface then
1404 * remove the multicast address route.
1407 memcpy(&mltaddr.sin6_addr,
1408 &satosin6(rt_key(rt))->sin6_addr,
1409 sizeof(mltaddr.sin6_addr));
1411 error = in6_rtrequest(RTM_DELETE,
1412 (struct sockaddr *)&mltaddr,
1413 (struct sockaddr *)&ia->ia_addr,
1414 (struct sockaddr *)&mltmask, RTF_UP,
1415 (struct rtentry **)0, RT_DEFAULT_FIB);
1417 log(LOG_INFO, "%s: link-local all-nodes "
1418 "multicast address deletion error\n",
1422 * Replace the gateway of the route.
1424 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1433 * Remove the node-local all-nodes address.
1435 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1436 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1439 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1440 if (rt != NULL && rt->rt_gateway != NULL &&
1441 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1442 &ia->ia_addr.sin6_addr,
1443 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1445 * If no more IPv6 address exists on this interface then
1446 * remove the multicast address route.
1449 memcpy(&mltaddr.sin6_addr,
1450 &satosin6(rt_key(rt))->sin6_addr,
1451 sizeof(mltaddr.sin6_addr));
1454 error = in6_rtrequest(RTM_DELETE,
1455 (struct sockaddr *)&mltaddr,
1456 (struct sockaddr *)&ia->ia_addr,
1457 (struct sockaddr *)&mltmask, RTF_UP,
1458 (struct rtentry **)0, RT_DEFAULT_FIB);
1460 log(LOG_INFO, "%s: node-local all-nodes"
1461 "multicast address deletion error\n",
1465 * Replace the gateway of the route.
1467 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1479 in6_purgeaddr(struct ifaddr *ifa)
1481 struct ifnet *ifp = ifa->ifa_ifp;
1482 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1484 struct ifaddr *ifa0;
1487 (*carp_detach_p)(ifa);
1490 * find another IPv6 address as the gateway for the
1491 * link-local and node-local all-nodes multicast
1495 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1496 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1497 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1498 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1505 IF_ADDR_RUNLOCK(ifp);
1508 * Remove the loopback route to the interface address.
1509 * The check for the current setting of "nd6_useloopback"
1512 if (ia->ia_flags & IFA_RTSELF) {
1513 error = ifa_del_loopback_route((struct ifaddr *)ia,
1514 (struct sockaddr *)&ia->ia_addr);
1516 ia->ia_flags &= ~IFA_RTSELF;
1519 /* stop DAD processing */
1522 /* Remove local address entry from lltable. */
1523 nd6_rem_ifa_lle(ia);
1525 /* Leave multicast groups. */
1526 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1531 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1532 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1533 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1534 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1536 log(LOG_INFO, "%s: err=%d, destination address delete "
1537 "failed\n", __func__, error);
1538 ia->ia_flags &= ~IFA_ROUTE;
1541 in6_unlink_ifa(ia, ifp);
1545 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1549 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1550 IF_ADDR_WUNLOCK(ifp);
1551 ifa_free(&ia->ia_ifa); /* if_addrhead */
1554 * Defer the release of what might be the last reference to the
1555 * in6_ifaddr so that it can't be freed before the remainder of the
1559 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1560 LIST_REMOVE(ia, ia6_hash);
1561 IN6_IFADDR_WUNLOCK();
1564 * Release the reference to the base prefix. There should be a
1565 * positive reference.
1567 if (ia->ia6_ndpr == NULL) {
1569 "in6_unlink_ifa: autoconf'ed address "
1570 "%p has no prefix\n", ia));
1572 ia->ia6_ndpr->ndpr_refcnt--;
1573 ia->ia6_ndpr = NULL;
1577 * Also, if the address being removed is autoconf'ed, call
1578 * pfxlist_onlink_check() since the release might affect the status of
1579 * other (detached) addresses.
1581 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1582 pfxlist_onlink_check();
1584 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1588 in6_purgeif(struct ifnet *ifp)
1590 struct ifaddr *ifa, *nifa;
1592 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1593 if (ifa->ifa_addr->sa_family != AF_INET6)
1602 * Notifies other other subsystems about address change/arrival:
1603 * 1) Notifies device handler on first IPv6 address assignment
1604 * 2) Handle routing table changes for P2P links and route
1605 * 3) Handle routing table changes for address host route
1608 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1609 struct in6_aliasreq *ifra, int hostIsNew)
1611 int error = 0, plen, ifacount = 0;
1613 struct sockaddr_in6 *pdst;
1614 char ip6buf[INET6_ADDRSTRLEN];
1617 * Give the interface a chance to initialize
1618 * if this is its first address,
1620 if (hostIsNew != 0) {
1622 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1623 if (ifa->ifa_addr->sa_family != AF_INET6)
1627 IF_ADDR_RUNLOCK(ifp);
1630 if (ifacount <= 1 && ifp->if_ioctl) {
1631 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1637 * If a new destination address is specified, scrub the old one and
1638 * install the new destination. Note that the interface must be
1641 pdst = &ifra->ifra_dstaddr;
1642 if (pdst->sin6_family == AF_INET6 &&
1643 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1644 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1645 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1646 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1647 "remove a route to the old destination: %s\n",
1648 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1649 /* proceed anyway... */
1651 ia->ia_flags &= ~IFA_ROUTE;
1652 ia->ia_dstaddr = *pdst;
1656 * If a new destination address is specified for a point-to-point
1657 * interface, install a route to the destination as an interface
1659 * XXX: the logic below rejects assigning multiple addresses on a p2p
1660 * interface that share the same destination.
1662 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1663 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1664 ia->ia_dstaddr.sin6_family == AF_INET6) {
1665 int rtflags = RTF_UP | RTF_HOST;
1667 * Handle the case for ::1 .
1669 if (ifp->if_flags & IFF_LOOPBACK)
1670 ia->ia_flags |= IFA_RTSELF;
1671 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1674 ia->ia_flags |= IFA_ROUTE;
1678 * add a loopback route to self if not exists
1680 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1681 error = ifa_add_loopback_route((struct ifaddr *)ia,
1682 (struct sockaddr *)&ia->ia_addr);
1684 ia->ia_flags |= IFA_RTSELF;
1691 * Find an IPv6 interface link-local address specific to an interface.
1692 * ifaddr is returned referenced.
1695 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1700 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1701 if (ifa->ifa_addr->sa_family != AF_INET6)
1703 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1704 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1711 IF_ADDR_RUNLOCK(ifp);
1713 return ((struct in6_ifaddr *)ifa);
1718 * find the internet address corresponding to a given address.
1719 * ifaddr is returned referenced.
1722 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1724 struct in6_ifaddr *ia;
1727 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1728 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1730 zoneid != ia->ia_addr.sin6_scope_id)
1732 ifa_ref(&ia->ia_ifa);
1736 IN6_IFADDR_RUNLOCK();
1741 * find the internet address corresponding to a given interface and address.
1742 * ifaddr is returned referenced.
1745 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1750 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1751 if (ifa->ifa_addr->sa_family != AF_INET6)
1753 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1758 IF_ADDR_RUNLOCK(ifp);
1760 return ((struct in6_ifaddr *)ifa);
1764 * Find a link-local scoped address on ifp and return it if any.
1767 in6ifa_llaonifp(struct ifnet *ifp)
1769 struct sockaddr_in6 *sin6;
1772 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1775 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1776 if (ifa->ifa_addr->sa_family != AF_INET6)
1778 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1779 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1780 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1781 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1784 if_addr_runlock(ifp);
1786 return ((struct in6_ifaddr *)ifa);
1790 * Convert IP6 address to printable (loggable) representation. Caller
1791 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1793 static char digits[] = "0123456789abcdef";
1795 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1797 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1799 const u_int16_t *a = (const u_int16_t *)addr;
1801 int dcolon = 0, zero = 0;
1805 for (i = 0; i < 8; i++) {
1806 if (*(a + i) == 0) {
1811 else if (maxcnt < cnt) {
1822 for (i = 0; i < 8; i++) {
1833 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1845 d = (const u_char *)a;
1846 /* Try to eliminate leading zeros in printout like in :0001. */
1848 *cp = digits[*d >> 4];
1853 *cp = digits[*d++ & 0xf];
1854 if (zero == 0 || (*cp != '0')) {
1858 *cp = digits[*d >> 4];
1859 if (zero == 0 || (*cp != '0')) {
1863 *cp++ = digits[*d & 0xf];
1872 in6_localaddr(struct in6_addr *in6)
1874 struct in6_ifaddr *ia;
1876 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1880 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1881 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1882 &ia->ia_prefixmask.sin6_addr)) {
1883 IN6_IFADDR_RUNLOCK();
1887 IN6_IFADDR_RUNLOCK();
1893 * Return 1 if an internet address is for the local host and configured
1894 * on one of its interfaces.
1897 in6_localip(struct in6_addr *in6)
1899 struct in6_ifaddr *ia;
1902 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1903 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1904 IN6_IFADDR_RUNLOCK();
1908 IN6_IFADDR_RUNLOCK();
1913 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1915 struct in6_ifaddr *ia;
1918 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1919 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1920 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1921 IN6_IFADDR_RUNLOCK();
1922 return (1); /* true */
1927 IN6_IFADDR_RUNLOCK();
1929 return (0); /* false */
1933 * return length of part which dst and src are equal
1937 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1940 u_char *s = (u_char *)src, *d = (u_char *)dst;
1941 u_char *lim = s + 16, r;
1944 if ((r = (*d++ ^ *s++)) != 0) {
1955 /* XXX: to be scope conscious */
1957 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1959 int bytelen, bitlen;
1962 if (0 > len || len > 128) {
1963 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1971 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1974 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1975 p2->s6_addr[bytelen] >> (8 - bitlen))
1982 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1984 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1985 int bytelen, bitlen, i;
1988 if (0 > len || len > 128) {
1989 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1994 bzero(maskp, sizeof(*maskp));
1997 for (i = 0; i < bytelen; i++)
1998 maskp->s6_addr[i] = 0xff;
2000 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2004 * return the best address out of the same scope. if no address was
2005 * found, return the first valid address from designated IF.
2008 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2010 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2012 struct in6_ifaddr *besta = 0;
2013 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2015 dep[0] = dep[1] = NULL;
2018 * We first look for addresses in the same scope.
2019 * If there is one, return it.
2020 * If two or more, return one which matches the dst longest.
2021 * If none, return one of global addresses assigned other ifs.
2024 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2025 if (ifa->ifa_addr->sa_family != AF_INET6)
2027 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2028 continue; /* XXX: is there any case to allow anycast? */
2029 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2030 continue; /* don't use this interface */
2031 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2033 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2034 if (V_ip6_use_deprecated)
2035 dep[0] = (struct in6_ifaddr *)ifa;
2039 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2041 * call in6_matchlen() as few as possible
2045 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2046 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2049 besta = (struct in6_ifaddr *)ifa;
2052 besta = (struct in6_ifaddr *)ifa;
2056 ifa_ref(&besta->ia_ifa);
2057 IF_ADDR_RUNLOCK(ifp);
2061 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2062 if (ifa->ifa_addr->sa_family != AF_INET6)
2064 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2065 continue; /* XXX: is there any case to allow anycast? */
2066 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2067 continue; /* don't use this interface */
2068 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2070 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2071 if (V_ip6_use_deprecated)
2072 dep[1] = (struct in6_ifaddr *)ifa;
2078 IF_ADDR_RUNLOCK(ifp);
2079 return (struct in6_ifaddr *)ifa;
2082 /* use the last-resort values, that are, deprecated addresses */
2084 ifa_ref((struct ifaddr *)dep[0]);
2085 IF_ADDR_RUNLOCK(ifp);
2089 ifa_ref((struct ifaddr *)dep[1]);
2090 IF_ADDR_RUNLOCK(ifp);
2094 IF_ADDR_RUNLOCK(ifp);
2099 * perform DAD when interface becomes IFF_UP.
2102 in6_if_up(struct ifnet *ifp)
2105 struct in6_ifaddr *ia;
2108 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2109 if (ifa->ifa_addr->sa_family != AF_INET6)
2111 ia = (struct in6_ifaddr *)ifa;
2112 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2114 * The TENTATIVE flag was likely set by hand
2115 * beforehand, implicitly indicating the need for DAD.
2116 * We may be able to skip the random delay in this
2117 * case, but we impose delays just in case.
2120 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2123 IF_ADDR_RUNLOCK(ifp);
2126 * special cases, like 6to4, are handled in in6_ifattach
2128 in6_ifattach(ifp, NULL);
2132 in6if_do_dad(struct ifnet *ifp)
2134 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2137 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2140 switch (ifp->if_type) {
2146 * These interfaces do not have the IFF_LOOPBACK flag,
2147 * but loop packets back. We do not have to do DAD on such
2148 * interfaces. We should even omit it, because loop-backed
2149 * NS would confuse the DAD procedure.
2154 * Our DAD routine requires the interface up and running.
2155 * However, some interfaces can be up before the RUNNING
2156 * status. Additionaly, users may try to assign addresses
2157 * before the interface becomes up (or running).
2158 * We simply skip DAD in such a case as a work around.
2159 * XXX: we should rather mark "tentative" on such addresses,
2160 * and do DAD after the interface becomes ready.
2162 if (!((ifp->if_flags & IFF_UP) &&
2163 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2171 * Calculate max IPv6 MTU through all the interfaces and store it
2177 unsigned long maxmtu = 0;
2180 IFNET_RLOCK_NOSLEEP();
2181 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2182 /* this function can be called during ifnet initialization */
2183 if (!ifp->if_afdata[AF_INET6])
2185 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2186 IN6_LINKMTU(ifp) > maxmtu)
2187 maxmtu = IN6_LINKMTU(ifp);
2189 IFNET_RUNLOCK_NOSLEEP();
2190 if (maxmtu) /* update only when maxmtu is positive */
2191 V_in6_maxmtu = maxmtu;
2195 * Provide the length of interface identifiers to be used for the link attached
2196 * to the given interface. The length should be defined in "IPv6 over
2197 * xxx-link" document. Note that address architecture might also define
2198 * the length for a particular set of address prefixes, regardless of the
2199 * link type. As clarified in rfc2462bis, those two definitions should be
2200 * consistent, and those really are as of August 2004.
2203 in6_if2idlen(struct ifnet *ifp)
2205 switch (ifp->if_type) {
2206 case IFT_ETHER: /* RFC2464 */
2207 #ifdef IFT_PROPVIRTUAL
2208 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2211 case IFT_L2VLAN: /* ditto */
2213 #ifdef IFT_IEEE80211
2214 case IFT_IEEE80211: /* ditto */
2217 case IFT_MIP: /* ditto */
2219 case IFT_INFINIBAND:
2221 case IFT_FDDI: /* RFC2467 */
2223 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2225 case IFT_PPP: /* RFC2472 */
2227 case IFT_ARCNET: /* RFC2497 */
2229 case IFT_FRELAY: /* RFC2590 */
2231 case IFT_IEEE1394: /* RFC3146 */
2234 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2236 return (64); /* XXX: is this really correct? */
2239 * Unknown link type:
2240 * It might be controversial to use the today's common constant
2241 * of 64 for these cases unconditionally. For full compliance,
2242 * we should return an error in this case. On the other hand,
2243 * if we simply miss the standard for the link type or a new
2244 * standard is defined for a new link type, the IFID length
2245 * is very likely to be the common constant. As a compromise,
2246 * we always use the constant, but make an explicit notice
2247 * indicating the "unknown" case.
2249 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2254 #include <sys/sysctl.h>
2256 struct in6_llentry {
2257 struct llentry base;
2258 struct sockaddr_in6 l3_addr6;
2262 * Deletes an address from the address table.
2263 * This function is called by the timer functions
2264 * such as arptimer() and nd6_llinfo_timer(), and
2265 * the caller does the locking.
2268 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2271 LLE_LOCK_DESTROY(lle);
2272 free(lle, M_LLTABLE);
2275 static struct llentry *
2276 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2278 struct in6_llentry *lle;
2280 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2281 if (lle == NULL) /* NB: caller generates msg */
2284 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2285 lle->base.lle_refcnt = 1;
2286 lle->base.lle_free = in6_lltable_free;
2287 LLE_LOCK_INIT(&lle->base);
2288 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2289 CALLOUT_RETURNUNLOCKED);
2291 return (&lle->base);
2295 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2296 const struct sockaddr *mask, u_int flags)
2298 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2299 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2300 struct llentry *lle, *next;
2304 * (flags & LLE_STATIC) means deleting all entries
2305 * including static ND6 entries.
2307 IF_AFDATA_WLOCK(llt->llt_ifp);
2308 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2309 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2310 if (IN6_ARE_MASKED_ADDR_EQUAL(
2311 &satosin6(L3_ADDR(lle))->sin6_addr,
2312 &pfx->sin6_addr, &msk->sin6_addr) &&
2313 ((flags & LLE_STATIC) ||
2314 !(lle->la_flags & LLE_STATIC))) {
2316 if (callout_stop(&lle->la_timer))
2322 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2326 in6_lltable_rtcheck(struct ifnet *ifp,
2328 const struct sockaddr *l3addr)
2331 char ip6buf[INET6_ADDRSTRLEN];
2333 KASSERT(l3addr->sa_family == AF_INET6,
2334 ("sin_family %d", l3addr->sa_family));
2336 /* Our local addresses are always only installed on the default FIB. */
2337 /* XXX rtalloc1 should take a const param */
2338 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2340 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2343 * Create an ND6 cache for an IPv6 neighbor
2344 * that is not covered by our own prefix.
2346 /* XXX ifaof_ifpforaddr should take a const param */
2347 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2354 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2355 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2364 static struct llentry *
2365 in6_lltable_lookup(struct lltable *llt, u_int flags,
2366 const struct sockaddr *l3addr)
2368 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2369 struct ifnet *ifp = llt->llt_ifp;
2370 struct llentry *lle;
2371 struct llentries *lleh;
2374 IF_AFDATA_LOCK_ASSERT(ifp);
2375 KASSERT(l3addr->sa_family == AF_INET6,
2376 ("sin_family %d", l3addr->sa_family));
2378 hashkey = sin6->sin6_addr.s6_addr32[3];
2379 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2380 LIST_FOREACH(lle, lleh, lle_next) {
2381 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2382 if (lle->la_flags & LLE_DELETED)
2384 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2385 sizeof(struct in6_addr)) == 0)
2390 if (!(flags & LLE_CREATE))
2392 IF_AFDATA_WLOCK_ASSERT(ifp);
2394 * A route that covers the given address must have
2395 * been installed 1st because we are doing a resolution,
2398 if (!(flags & LLE_IFADDR) &&
2399 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2402 lle = in6_lltable_new(l3addr, flags);
2404 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2407 lle->la_flags = flags & ~LLE_CREATE;
2408 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2409 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2410 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2414 lle->lle_head = lleh;
2415 lle->la_flags |= LLE_LINKED;
2416 LIST_INSERT_HEAD(lleh, lle, lle_next);
2417 } else if (flags & LLE_DELETE) {
2418 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2420 lle->la_flags |= LLE_DELETED;
2422 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2424 if ((lle->la_flags &
2425 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2432 if (LLE_IS_VALID(lle)) {
2433 if (flags & LLE_EXCLUSIVE)
2442 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2444 struct ifnet *ifp = llt->llt_ifp;
2445 struct llentry *lle;
2448 struct rt_msghdr rtm;
2449 struct sockaddr_in6 sin6;
2451 * ndp.c assumes that sdl is word aligned
2456 struct sockaddr_dl sdl;
2460 if (ifp->if_flags & IFF_LOOPBACK)
2463 LLTABLE_LOCK_ASSERT();
2466 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2467 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2468 struct sockaddr_dl *sdl;
2470 /* skip deleted or invalid entries */
2471 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2473 /* Skip if jailed and not a valid IP of the prison. */
2474 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2477 * produce a msg made of:
2479 * struct sockaddr_in6 (IPv6)
2480 * struct sockaddr_dl;
2482 bzero(&ndpc, sizeof(ndpc));
2483 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2484 ndpc.rtm.rtm_version = RTM_VERSION;
2485 ndpc.rtm.rtm_type = RTM_GET;
2486 ndpc.rtm.rtm_flags = RTF_UP;
2487 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2488 ndpc.sin6.sin6_family = AF_INET6;
2489 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2490 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2491 if (V_deembed_scopeid)
2492 sa6_recoverscope(&ndpc.sin6);
2495 if (lle->la_flags & LLE_PUB)
2496 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2499 sdl->sdl_family = AF_LINK;
2500 sdl->sdl_len = sizeof(*sdl);
2501 sdl->sdl_alen = ifp->if_addrlen;
2502 sdl->sdl_index = ifp->if_index;
2503 sdl->sdl_type = ifp->if_type;
2504 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2505 ndpc.rtm.rtm_rmx.rmx_expire =
2506 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2507 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2508 if (lle->la_flags & LLE_STATIC)
2509 ndpc.rtm.rtm_flags |= RTF_STATIC;
2510 ndpc.rtm.rtm_index = ifp->if_index;
2511 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2520 in6_domifattach(struct ifnet *ifp)
2522 struct in6_ifextra *ext;
2524 /* There are not IPv6-capable interfaces. */
2525 switch (ifp->if_type) {
2531 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2532 bzero(ext, sizeof(*ext));
2534 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2535 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2536 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2537 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2539 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2540 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2542 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2543 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2545 ext->nd_ifinfo = nd6_ifattach(ifp);
2546 ext->scope6_id = scope6_ifattach(ifp);
2547 ext->lltable = lltable_init(ifp, AF_INET6);
2548 if (ext->lltable != NULL) {
2549 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2550 ext->lltable->llt_lookup = in6_lltable_lookup;
2551 ext->lltable->llt_dump = in6_lltable_dump;
2554 ext->mld_ifinfo = mld_domifattach(ifp);
2560 in6_domifdetach(struct ifnet *ifp, void *aux)
2562 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2564 mld_domifdetach(ifp);
2565 scope6_ifdetach(ext->scope6_id);
2566 nd6_ifdetach(ext->nd_ifinfo);
2567 lltable_free(ext->lltable);
2568 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2569 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2570 free(ext->in6_ifstat, M_IFADDR);
2571 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2572 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2573 free(ext->icmp6_ifstat, M_IFADDR);
2574 free(ext, M_IFADDR);
2578 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2579 * v4 mapped addr or v4 compat addr
2582 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2585 bzero(sin, sizeof(*sin));
2586 sin->sin_len = sizeof(struct sockaddr_in);
2587 sin->sin_family = AF_INET;
2588 sin->sin_port = sin6->sin6_port;
2589 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2592 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2594 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2596 bzero(sin6, sizeof(*sin6));
2597 sin6->sin6_len = sizeof(struct sockaddr_in6);
2598 sin6->sin6_family = AF_INET6;
2599 sin6->sin6_port = sin->sin_port;
2600 sin6->sin6_addr.s6_addr32[0] = 0;
2601 sin6->sin6_addr.s6_addr32[1] = 0;
2602 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2603 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2606 /* Convert sockaddr_in6 into sockaddr_in. */
2608 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2610 struct sockaddr_in *sin_p;
2611 struct sockaddr_in6 sin6;
2614 * Save original sockaddr_in6 addr and convert it
2617 sin6 = *(struct sockaddr_in6 *)nam;
2618 sin_p = (struct sockaddr_in *)nam;
2619 in6_sin6_2_sin(sin_p, &sin6);
2622 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2624 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2626 struct sockaddr_in *sin_p;
2627 struct sockaddr_in6 *sin6_p;
2629 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2630 sin_p = (struct sockaddr_in *)*nam;
2631 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2632 free(*nam, M_SONAME);
2633 *nam = (struct sockaddr *)sin6_p;