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_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;
274 int carp_attached = 0;
279 * Compat to make pre-10.x ifconfig(8) operable.
281 if (cmd == OSIOCAIFADDR_IN6)
282 cmd = SIOCAIFADDR_IN6;
285 case SIOCGETSGCNT_IN6:
286 case SIOCGETMIFCNT_IN6:
288 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
289 * We cannot see how that would be needed, so do not adjust the
290 * KPI blindly; more likely should clean up the IPv4 variant.
292 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
296 case SIOCAADDRCTL_POLICY:
297 case SIOCDADDRCTL_POLICY:
299 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
303 return (in6_src_ioctl(cmd, data));
310 case SIOCSNDFLUSH_IN6:
311 case SIOCSPFXFLUSH_IN6:
312 case SIOCSRTRFLUSH_IN6:
313 case SIOCSDEFIFACE_IN6:
314 case SIOCSIFINFO_FLAGS:
315 case SIOCSIFINFO_IN6:
317 error = priv_check(td, PRIV_NETINET_ND6);
322 case OSIOCGIFINFO_IN6:
323 case SIOCGIFINFO_IN6:
326 case SIOCGNBRINFO_IN6:
327 case SIOCGDEFIFACE_IN6:
328 return (nd6_ioctl(cmd, data, ifp));
330 #ifdef COMPAT_FREEBSD32
331 case SIOCGDEFIFACE32_IN6:
333 struct in6_ndifreq ndif;
334 struct in6_ndifreq32 *ndif32;
336 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
340 ndif32 = (struct in6_ndifreq32 *)data;
341 ndif32->ifindex = ndif.ifindex;
348 case SIOCSIFPREFIX_IN6:
349 case SIOCDIFPREFIX_IN6:
350 case SIOCAIFPREFIX_IN6:
351 case SIOCCIFPREFIX_IN6:
352 case SIOCSGIFPREFIX_IN6:
353 case SIOCGIFPREFIX_IN6:
355 "prefix ioctls are now invalidated. "
356 "please use ifconfig.\n");
363 error = priv_check(td, PRIV_NETINET_SCOPE6);
367 return (scope6_set(ifp,
368 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
370 return (scope6_get(ifp,
371 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
373 return (scope6_get_default((struct scope6_id *)
374 ifr->ifr_ifru.ifru_scope_id));
378 * Find address for this interface, if it exists.
380 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
381 * only, and used the first interface address as the target of other
382 * operations (without checking ifra_addr). This was because netinet
383 * code/API assumed at most 1 interface address per interface.
384 * Since IPv6 allows a node to assign multiple addresses
385 * on a single interface, we almost always look and check the
386 * presence of ifra_addr, and reject invalid ones here.
387 * It also decreases duplicated code among SIOC*_IN6 operations.
390 case SIOCAIFADDR_IN6:
391 case SIOCSIFPHYADDR_IN6:
392 sa6 = &ifra->ifra_addr;
394 case SIOCSIFADDR_IN6:
395 case SIOCGIFADDR_IN6:
396 case SIOCSIFDSTADDR_IN6:
397 case SIOCSIFNETMASK_IN6:
398 case SIOCGIFDSTADDR_IN6:
399 case SIOCGIFNETMASK_IN6:
400 case SIOCDIFADDR_IN6:
401 case SIOCGIFPSRCADDR_IN6:
402 case SIOCGIFPDSTADDR_IN6:
403 case SIOCGIFAFLAG_IN6:
404 case SIOCSNDFLUSH_IN6:
405 case SIOCSPFXFLUSH_IN6:
406 case SIOCSRTRFLUSH_IN6:
407 case SIOCGIFALIFETIME_IN6:
408 case SIOCSIFALIFETIME_IN6:
409 case SIOCGIFSTAT_IN6:
410 case SIOCGIFSTAT_ICMP6:
411 sa6 = &ifr->ifr_addr;
418 * Although we should pass any non-INET6 ioctl requests
419 * down to driver, we filter some legacy INET requests.
420 * Drivers trust SIOCSIFADDR et al to come from an already
421 * privileged layer, and do not perform any credentials
422 * checks or input validation.
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_uptime < time_uptime) {
521 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
522 lt->ia6t_pltime + time_uptime < time_uptime) {
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 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
565 ifp->if_afdata[AF_INET6])->in6_ifstat,
566 &ifr->ifr_ifru.ifru_stat,
567 sizeof(struct in6_ifstat) / sizeof(uint64_t));
570 case SIOCGIFSTAT_ICMP6:
575 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
576 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
577 &ifr->ifr_ifru.ifru_icmp6stat,
578 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
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_uptime + 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_uptime + 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
659 if (cmd == ocmd && ifra->ifra_vhid > 0) {
660 if (carp_attach_p != NULL)
661 error = (*carp_attach_p)(&ia->ia_ifa,
664 error = EPROTONOSUPPORT;
672 * then, make the prefix on-link on the interface.
673 * XXX: we'd rather create the prefix before the address, but
674 * we need at least one address to install the corresponding
675 * interface route, so we configure the address first.
679 * convert mask to prefix length (prefixmask has already
680 * been validated in in6_update_ifa().
682 bzero(&pr0, sizeof(pr0));
684 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
686 if (pr0.ndpr_plen == 128) {
687 break; /* we don't need to install a host route. */
689 pr0.ndpr_prefix = ifra->ifra_addr;
690 /* apply the mask for safety. */
691 for (i = 0; i < 4; i++) {
692 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
693 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
696 * XXX: since we don't have an API to set prefix (not address)
697 * lifetimes, we just use the same lifetimes as addresses.
698 * The (temporarily) installed lifetimes can be overridden by
699 * later advertised RAs (when accept_rtadv is non 0), which is
700 * an intended behavior.
702 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
704 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
705 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
706 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
708 /* add the prefix if not yet. */
709 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
711 * nd6_prelist_add will install the corresponding
714 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
716 (*carp_detach_p)(&ia->ia_ifa);
721 (*carp_detach_p)(&ia->ia_ifa);
722 log(LOG_ERR, "nd6_prelist_add succeeded but "
729 /* relate the address to the prefix */
730 if (ia->ia6_ndpr == NULL) {
735 * If this is the first autoconf address from the
736 * prefix, create a temporary address as well
739 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
740 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
742 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
743 log(LOG_NOTICE, "in6_control: failed "
744 "to create a temporary address, "
751 * this might affect the status of autoconfigured addresses,
752 * that is, this address might make other addresses detached.
754 pfxlist_onlink_check();
755 if (error == 0 && ia) {
756 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
758 * Try to clear the flag when a new
759 * IPv6 address is added onto an
760 * IFDISABLED interface and it
763 struct in6_ndireq nd;
765 memset(&nd, 0, sizeof(nd));
766 nd.ndi.flags = ND_IFINFO(ifp)->flags;
767 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
768 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
769 (caddr_t)&nd, ifp) < 0)
770 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
771 "SIOCSIFINFO_FLAGS for -ifdisabled "
774 * Ignore failure of clearing the flag
775 * intentionally. The failure means
776 * address duplication was detected.
779 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
784 case SIOCDIFADDR_IN6:
786 struct nd_prefix *pr;
789 * If the address being deleted is the only one that owns
790 * the corresponding prefix, expire the prefix as well.
791 * XXX: theoretically, we don't have to worry about such
792 * relationship, since we separate the address management
793 * and the prefix management. We do this, however, to provide
794 * as much backward compatibility as possible in terms of
795 * the ioctl operation.
796 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
799 in6_purgeaddr(&ia->ia_ifa);
800 if (pr && pr->ndpr_refcnt == 0)
802 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
807 if (ifp == NULL || ifp->if_ioctl == 0) {
811 error = (*ifp->if_ioctl)(ifp, cmd, data);
818 ifa_free(&ia->ia_ifa);
824 * Join necessary multicast groups. Factored out from in6_update_ifa().
825 * This entire work should only be done once, for the default FIB.
828 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
829 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
831 char ip6buf[INET6_ADDRSTRLEN];
832 struct sockaddr_in6 mltaddr, mltmask;
833 struct in6_addr llsol;
834 struct in6_multi_mship *imm;
838 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
840 /* Join solicited multicast addr for new host id. */
841 bzero(&llsol, sizeof(struct in6_addr));
842 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
843 llsol.s6_addr32[1] = 0;
844 llsol.s6_addr32[2] = htonl(1);
845 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
846 llsol.s6_addr8[12] = 0xff;
847 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
848 /* XXX: should not happen */
849 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
853 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
855 * We need a random delay for DAD on the address being
856 * configured. It also means delaying transmission of the
857 * corresponding MLD report to avoid report collision.
858 * [RFC 4861, Section 6.3.7]
860 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
862 imm = in6_joingroup(ifp, &llsol, &error, delay);
864 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
865 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
866 if_name(ifp), error));
869 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
870 *in6m_sol = imm->i6mm_maddr;
872 bzero(&mltmask, sizeof(mltmask));
873 mltmask.sin6_len = sizeof(struct sockaddr_in6);
874 mltmask.sin6_family = AF_INET6;
875 mltmask.sin6_addr = in6mask32;
876 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
879 * Join link-local all-nodes address.
881 bzero(&mltaddr, sizeof(mltaddr));
882 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
883 mltaddr.sin6_family = AF_INET6;
884 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
885 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
886 goto cleanup; /* XXX: should not fail */
889 * XXX: do we really need this automatic routes? We should probably
890 * reconsider this stuff. Most applications actually do not need the
891 * routes, since they usually specify the outgoing interface.
893 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
895 /* XXX: only works in !SCOPEDROUTING case. */
896 if (memcmp(&mltaddr.sin6_addr,
897 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
904 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
905 (struct sockaddr *)&ia->ia_addr,
906 (struct sockaddr *)&mltmask, RTF_UP,
907 (struct rtentry **)0, RT_DEFAULT_FIB);
913 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
915 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
916 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
917 &mltaddr.sin6_addr), if_name(ifp), error));
920 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
923 * Join node information group address.
926 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
928 * The spec does not say anything about delay for this group,
929 * but the same logic should apply.
931 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
933 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
935 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
937 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
938 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
939 &mltaddr.sin6_addr), if_name(ifp), error));
940 /* XXX not very fatal, go on... */
942 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
944 if (V_icmp6_nodeinfo_oldmcprefix &&
945 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
946 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
948 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
949 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
950 &mltaddr.sin6_addr), if_name(ifp), error));
951 /* XXX not very fatal, go on... */
953 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
957 * Join interface-local all-nodes address.
958 * (ff01::1%ifN, and ff01::%ifN/32)
960 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
961 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
962 goto cleanup; /* XXX: should not fail */
963 /* XXX: again, do we really need the route? */
964 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
966 if (memcmp(&mltaddr.sin6_addr,
967 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
974 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
975 (struct sockaddr *)&ia->ia_addr,
976 (struct sockaddr *)&mltmask, RTF_UP,
977 (struct rtentry **)0, RT_DEFAULT_FIB);
983 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
985 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
986 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
987 &mltaddr.sin6_addr), if_name(ifp), error));
990 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
998 * Update parameters of an IPv6 interface address.
999 * If necessary, a new entry is created and linked into address chains.
1000 * This function is separated from in6_control().
1003 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1004 struct in6_ifaddr *ia, int flags)
1006 int error = 0, hostIsNew = 0, plen = -1;
1007 struct sockaddr_in6 dst6;
1008 struct in6_addrlifetime *lt;
1009 struct in6_multi *in6m_sol;
1011 char ip6buf[INET6_ADDRSTRLEN];
1013 /* Validate parameters */
1014 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1018 * The destination address for a p2p link must have a family
1019 * of AF_UNSPEC or AF_INET6.
1021 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1022 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1023 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1024 return (EAFNOSUPPORT);
1026 * validate ifra_prefixmask. don't check sin6_family, netmask
1027 * does not carry fields other than sin6_len.
1029 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1032 * Because the IPv6 address architecture is classless, we require
1033 * users to specify a (non 0) prefix length (mask) for a new address.
1034 * We also require the prefix (when specified) mask is valid, and thus
1035 * reject a non-consecutive mask.
1037 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1039 if (ifra->ifra_prefixmask.sin6_len != 0) {
1040 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1041 (u_char *)&ifra->ifra_prefixmask +
1042 ifra->ifra_prefixmask.sin6_len);
1047 * In this case, ia must not be NULL. We just use its prefix
1050 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1053 * If the destination address on a p2p interface is specified,
1054 * and the address is a scoped one, validate/set the scope
1057 dst6 = ifra->ifra_dstaddr;
1058 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1059 (dst6.sin6_family == AF_INET6)) {
1060 struct in6_addr in6_tmp;
1063 in6_tmp = dst6.sin6_addr;
1064 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1065 return (EINVAL); /* XXX: should be impossible */
1067 if (dst6.sin6_scope_id != 0) {
1068 if (dst6.sin6_scope_id != zoneid)
1070 } else /* user omit to specify the ID. */
1071 dst6.sin6_scope_id = zoneid;
1073 /* convert into the internal form */
1074 if (sa6_embedscope(&dst6, 0))
1075 return (EINVAL); /* XXX: should be impossible */
1078 * The destination address can be specified only for a p2p or a
1079 * loopback interface. If specified, the corresponding prefix length
1082 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1083 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1084 /* XXX: noisy message */
1085 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1086 "be specified for a p2p or a loopback IF only\n"));
1090 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1091 "be 128 when dstaddr is specified\n"));
1095 /* lifetime consistency check */
1096 lt = &ifra->ifra_lifetime;
1097 if (lt->ia6t_pltime > lt->ia6t_vltime)
1099 if (lt->ia6t_vltime == 0) {
1101 * the following log might be noisy, but this is a typical
1102 * configuration mistake or a tool's bug.
1105 "in6_update_ifa: valid lifetime is 0 for %s\n",
1106 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1109 return (0); /* there's nothing to do */
1113 * If this is a new address, allocate a new ifaddr and link it
1119 * When in6_update_ifa() is called in a process of a received
1120 * RA, it is called under an interrupt context. So, we should
1121 * call malloc with M_NOWAIT.
1123 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1126 LIST_INIT(&ia->ia6_memberships);
1127 /* Initialize the address and masks, and put time stamp */
1128 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1129 ia->ia_addr.sin6_family = AF_INET6;
1130 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1131 ia->ia6_createtime = time_uptime;
1132 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1134 * XXX: some functions expect that ifa_dstaddr is not
1135 * NULL for p2p interfaces.
1137 ia->ia_ifa.ifa_dstaddr =
1138 (struct sockaddr *)&ia->ia_dstaddr;
1140 ia->ia_ifa.ifa_dstaddr = NULL;
1142 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1144 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1146 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1147 IF_ADDR_WUNLOCK(ifp);
1149 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1151 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1152 LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr),
1154 IN6_IFADDR_WUNLOCK();
1157 /* update timestamp */
1158 ia->ia6_updatetime = time_uptime;
1160 /* set prefix mask */
1161 if (ifra->ifra_prefixmask.sin6_len) {
1163 * We prohibit changing the prefix length of an existing
1165 * + such an operation should be rare in IPv6, and
1166 * + the operation would confuse prefix management.
1168 if (ia->ia_prefixmask.sin6_len &&
1169 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1170 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1171 " existing (%s) address should not be changed\n",
1172 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1176 ia->ia_prefixmask = ifra->ifra_prefixmask;
1177 ia->ia_prefixmask.sin6_family = AF_INET6;
1181 * If a new destination address is specified, scrub the old one and
1182 * install the new destination. Note that the interface must be
1183 * p2p or loopback (see the check above.)
1185 if (dst6.sin6_family == AF_INET6 &&
1186 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1189 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1190 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1191 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1192 "a route to the old destination: %s\n",
1193 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1194 /* proceed anyway... */
1196 ia->ia_flags &= ~IFA_ROUTE;
1197 ia->ia_dstaddr = dst6;
1201 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1202 * to see if the address is deprecated or invalidated, but initialize
1203 * these members for applications.
1205 ia->ia6_lifetime = ifra->ifra_lifetime;
1206 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1207 ia->ia6_lifetime.ia6t_expire =
1208 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1210 ia->ia6_lifetime.ia6t_expire = 0;
1211 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1212 ia->ia6_lifetime.ia6t_preferred =
1213 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1215 ia->ia6_lifetime.ia6t_preferred = 0;
1217 /* reset the interface and routing table appropriately. */
1218 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1222 * configure address flags.
1224 ia->ia6_flags = ifra->ifra_flags;
1226 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1227 * userland, make it deprecated.
1229 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1230 ia->ia6_lifetime.ia6t_pltime = 0;
1231 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1234 * Make the address tentative before joining multicast addresses,
1235 * so that corresponding MLD responses would not have a tentative
1238 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1239 if (hostIsNew && in6if_do_dad(ifp))
1240 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1242 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1243 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1244 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1247 * We are done if we have simply modified an existing address.
1253 * Beyond this point, we should call in6_purgeaddr upon an error,
1254 * not just go to unlink.
1257 /* Join necessary multicast groups. */
1259 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1260 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1266 * Perform DAD, if needed.
1267 * XXX It may be of use, if we can administratively disable DAD.
1269 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1270 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1272 int mindelay, maxdelay;
1275 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1277 * We need to impose a delay before sending an NS
1278 * for DAD. Check if we also needed a delay for the
1279 * corresponding MLD message. If we did, the delay
1280 * should be larger than the MLD delay (this could be
1281 * relaxed a bit, but this simple logic is at least
1283 * XXX: Break data hiding guidelines and look at
1284 * state for the solicited multicast group.
1287 if (in6m_sol != NULL &&
1288 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1289 mindelay = in6m_sol->in6m_timer;
1291 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1292 if (maxdelay - mindelay == 0)
1296 (arc4random() % (maxdelay - mindelay)) +
1300 nd6_dad_start((struct ifaddr *)ia, delay);
1303 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1304 ifa_free(&ia->ia_ifa);
1309 * XXX: if a change of an existing address failed, keep the entry
1313 in6_unlink_ifa(ia, ifp);
1314 ifa_free(&ia->ia_ifa);
1319 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1320 ifa_free(&ia->ia_ifa);
1321 in6_purgeaddr(&ia->ia_ifa);
1326 * Leave multicast groups. Factored out from in6_purgeaddr().
1327 * This entire work should only be done once, for the default FIB.
1330 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1332 struct sockaddr_in6 mltaddr, mltmask;
1333 struct in6_multi_mship *imm;
1335 struct sockaddr_in6 sin6;
1339 * Leave from multicast groups we have joined for the interface.
1341 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1342 LIST_REMOVE(imm, i6mm_chain);
1343 in6_leavegroup(imm);
1347 * Remove the link-local all-nodes address.
1349 bzero(&mltmask, sizeof(mltmask));
1350 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1351 mltmask.sin6_family = AF_INET6;
1352 mltmask.sin6_addr = in6mask32;
1354 bzero(&mltaddr, sizeof(mltaddr));
1355 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1356 mltaddr.sin6_family = AF_INET6;
1357 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1359 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1363 * As for the mltaddr above, proactively prepare the sin6 to avoid
1364 * rtentry un- and re-locking.
1367 bzero(&sin6, sizeof(sin6));
1368 sin6.sin6_len = sizeof(sin6);
1369 sin6.sin6_family = AF_INET6;
1370 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1371 sizeof(sin6.sin6_addr));
1372 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1377 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1378 if (rt != NULL && rt->rt_gateway != NULL &&
1379 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1380 &ia->ia_addr.sin6_addr,
1381 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1383 * If no more IPv6 address exists on this interface then
1384 * remove the multicast address route.
1387 memcpy(&mltaddr.sin6_addr,
1388 &satosin6(rt_key(rt))->sin6_addr,
1389 sizeof(mltaddr.sin6_addr));
1391 error = in6_rtrequest(RTM_DELETE,
1392 (struct sockaddr *)&mltaddr,
1393 (struct sockaddr *)&ia->ia_addr,
1394 (struct sockaddr *)&mltmask, RTF_UP,
1395 (struct rtentry **)0, RT_DEFAULT_FIB);
1397 log(LOG_INFO, "%s: link-local all-nodes "
1398 "multicast address deletion error\n",
1402 * Replace the gateway of the route.
1404 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1413 * Remove the node-local all-nodes address.
1415 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1416 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1419 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1420 if (rt != NULL && rt->rt_gateway != NULL &&
1421 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1422 &ia->ia_addr.sin6_addr,
1423 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1425 * If no more IPv6 address exists on this interface then
1426 * remove the multicast address route.
1429 memcpy(&mltaddr.sin6_addr,
1430 &satosin6(rt_key(rt))->sin6_addr,
1431 sizeof(mltaddr.sin6_addr));
1434 error = in6_rtrequest(RTM_DELETE,
1435 (struct sockaddr *)&mltaddr,
1436 (struct sockaddr *)&ia->ia_addr,
1437 (struct sockaddr *)&mltmask, RTF_UP,
1438 (struct rtentry **)0, RT_DEFAULT_FIB);
1440 log(LOG_INFO, "%s: node-local all-nodes"
1441 "multicast address deletion error\n",
1445 * Replace the gateway of the route.
1447 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1459 in6_purgeaddr(struct ifaddr *ifa)
1461 struct ifnet *ifp = ifa->ifa_ifp;
1462 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1464 struct ifaddr *ifa0;
1467 (*carp_detach_p)(ifa);
1470 * find another IPv6 address as the gateway for the
1471 * link-local and node-local all-nodes multicast
1475 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1476 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1477 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1478 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1485 IF_ADDR_RUNLOCK(ifp);
1488 * Remove the loopback route to the interface address.
1489 * The check for the current setting of "nd6_useloopback"
1492 if (ia->ia_flags & IFA_RTSELF) {
1493 error = ifa_del_loopback_route((struct ifaddr *)ia,
1494 (struct sockaddr *)&ia->ia_addr);
1496 ia->ia_flags &= ~IFA_RTSELF;
1499 /* stop DAD processing */
1502 /* Remove local address entry from lltable. */
1505 /* Leave multicast groups. */
1506 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1511 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1512 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1513 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1514 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1516 log(LOG_INFO, "%s: err=%d, destination address delete "
1517 "failed\n", __func__, error);
1518 ia->ia_flags &= ~IFA_ROUTE;
1521 in6_unlink_ifa(ia, ifp);
1525 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1529 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1530 IF_ADDR_WUNLOCK(ifp);
1531 ifa_free(&ia->ia_ifa); /* if_addrhead */
1534 * Defer the release of what might be the last reference to the
1535 * in6_ifaddr so that it can't be freed before the remainder of the
1539 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1540 LIST_REMOVE(ia, ia6_hash);
1541 IN6_IFADDR_WUNLOCK();
1544 * Release the reference to the base prefix. There should be a
1545 * positive reference.
1547 if (ia->ia6_ndpr == NULL) {
1549 "in6_unlink_ifa: autoconf'ed address "
1550 "%p has no prefix\n", ia));
1552 ia->ia6_ndpr->ndpr_refcnt--;
1553 ia->ia6_ndpr = NULL;
1557 * Also, if the address being removed is autoconf'ed, call
1558 * pfxlist_onlink_check() since the release might affect the status of
1559 * other (detached) addresses.
1561 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1562 pfxlist_onlink_check();
1564 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1568 in6_purgeif(struct ifnet *ifp)
1570 struct ifaddr *ifa, *nifa;
1572 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1573 if (ifa->ifa_addr->sa_family != AF_INET6)
1582 * Initialize an interface's IPv6 address and routing table entry.
1585 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1586 struct sockaddr_in6 *sin6, int newhost)
1588 int error = 0, plen, ifacount = 0;
1592 * Give the interface a chance to initialize
1593 * if this is its first address,
1594 * and to validate the address if necessary.
1597 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1598 if (ifa->ifa_addr->sa_family != AF_INET6)
1602 IF_ADDR_RUNLOCK(ifp);
1604 ia->ia_addr = *sin6;
1606 if (ifacount <= 1 && ifp->if_ioctl) {
1607 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1612 ia->ia_ifa.ifa_metric = ifp->if_metric;
1614 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1618 * If a new destination address is specified for a point-to-point
1619 * interface, install a route to the destination as an interface
1621 * XXX: the logic below rejects assigning multiple addresses on a p2p
1622 * interface that share the same destination.
1624 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1625 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1626 ia->ia_dstaddr.sin6_family == AF_INET6) {
1627 int rtflags = RTF_UP | RTF_HOST;
1628 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1631 ia->ia_flags |= IFA_ROUTE;
1633 * Handle the case for ::1 .
1635 if (ifp->if_flags & IFF_LOOPBACK)
1636 ia->ia_flags |= IFA_RTSELF;
1640 * add a loopback route to self
1642 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1643 error = ifa_add_loopback_route((struct ifaddr *)ia,
1644 (struct sockaddr *)&ia->ia_addr);
1646 ia->ia_flags |= IFA_RTSELF;
1649 /* Add local address to lltable, if necessary (ex. on p2p link). */
1651 in6_ifaddloop(&(ia->ia_ifa));
1657 * Find an IPv6 interface link-local address specific to an interface.
1658 * ifaddr is returned referenced.
1661 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1666 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1667 if (ifa->ifa_addr->sa_family != AF_INET6)
1669 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1670 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1677 IF_ADDR_RUNLOCK(ifp);
1679 return ((struct in6_ifaddr *)ifa);
1684 * find the internet address corresponding to a given interface and address.
1685 * ifaddr is returned referenced.
1688 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1693 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1694 if (ifa->ifa_addr->sa_family != AF_INET6)
1696 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1701 IF_ADDR_RUNLOCK(ifp);
1703 return ((struct in6_ifaddr *)ifa);
1707 * Find a link-local scoped address on ifp and return it if any.
1710 in6ifa_llaonifp(struct ifnet *ifp)
1712 struct sockaddr_in6 *sin6;
1715 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1718 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1719 if (ifa->ifa_addr->sa_family != AF_INET6)
1721 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1722 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1723 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1724 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1727 if_addr_runlock(ifp);
1729 return ((struct in6_ifaddr *)ifa);
1733 * Convert IP6 address to printable (loggable) representation. Caller
1734 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1736 static char digits[] = "0123456789abcdef";
1738 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1740 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1742 const u_int16_t *a = (const u_int16_t *)addr;
1744 int dcolon = 0, zero = 0;
1748 for (i = 0; i < 8; i++) {
1749 if (*(a + i) == 0) {
1754 else if (maxcnt < cnt) {
1765 for (i = 0; i < 8; i++) {
1776 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1788 d = (const u_char *)a;
1789 /* Try to eliminate leading zeros in printout like in :0001. */
1791 *cp = digits[*d >> 4];
1796 *cp = digits[*d++ & 0xf];
1797 if (zero == 0 || (*cp != '0')) {
1801 *cp = digits[*d >> 4];
1802 if (zero == 0 || (*cp != '0')) {
1806 *cp++ = digits[*d & 0xf];
1815 in6_localaddr(struct in6_addr *in6)
1817 struct in6_ifaddr *ia;
1819 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1823 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1824 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1825 &ia->ia_prefixmask.sin6_addr)) {
1826 IN6_IFADDR_RUNLOCK();
1830 IN6_IFADDR_RUNLOCK();
1836 * Return 1 if an internet address is for the local host and configured
1837 * on one of its interfaces.
1840 in6_localip(struct in6_addr *in6)
1842 struct in6_ifaddr *ia;
1845 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1846 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1847 IN6_IFADDR_RUNLOCK();
1851 IN6_IFADDR_RUNLOCK();
1856 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1858 struct in6_ifaddr *ia;
1861 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1862 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1863 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1864 IN6_IFADDR_RUNLOCK();
1865 return (1); /* true */
1870 IN6_IFADDR_RUNLOCK();
1872 return (0); /* false */
1876 * return length of part which dst and src are equal
1880 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1883 u_char *s = (u_char *)src, *d = (u_char *)dst;
1884 u_char *lim = s + 16, r;
1887 if ((r = (*d++ ^ *s++)) != 0) {
1898 /* XXX: to be scope conscious */
1900 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1902 int bytelen, bitlen;
1905 if (0 > len || len > 128) {
1906 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1914 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1917 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1918 p2->s6_addr[bytelen] >> (8 - bitlen))
1925 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1927 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1928 int bytelen, bitlen, i;
1931 if (0 > len || len > 128) {
1932 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1937 bzero(maskp, sizeof(*maskp));
1940 for (i = 0; i < bytelen; i++)
1941 maskp->s6_addr[i] = 0xff;
1943 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1947 * return the best address out of the same scope. if no address was
1948 * found, return the first valid address from designated IF.
1951 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1953 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1955 struct in6_ifaddr *besta = 0;
1956 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1958 dep[0] = dep[1] = NULL;
1961 * We first look for addresses in the same scope.
1962 * If there is one, return it.
1963 * If two or more, return one which matches the dst longest.
1964 * If none, return one of global addresses assigned other ifs.
1967 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1968 if (ifa->ifa_addr->sa_family != AF_INET6)
1970 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1971 continue; /* XXX: is there any case to allow anycast? */
1972 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1973 continue; /* don't use this interface */
1974 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1976 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1977 if (V_ip6_use_deprecated)
1978 dep[0] = (struct in6_ifaddr *)ifa;
1982 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1984 * call in6_matchlen() as few as possible
1988 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1989 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1992 besta = (struct in6_ifaddr *)ifa;
1995 besta = (struct in6_ifaddr *)ifa;
1999 ifa_ref(&besta->ia_ifa);
2000 IF_ADDR_RUNLOCK(ifp);
2004 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2005 if (ifa->ifa_addr->sa_family != AF_INET6)
2007 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2008 continue; /* XXX: is there any case to allow anycast? */
2009 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2010 continue; /* don't use this interface */
2011 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2013 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2014 if (V_ip6_use_deprecated)
2015 dep[1] = (struct in6_ifaddr *)ifa;
2021 IF_ADDR_RUNLOCK(ifp);
2022 return (struct in6_ifaddr *)ifa;
2025 /* use the last-resort values, that are, deprecated addresses */
2027 ifa_ref((struct ifaddr *)dep[0]);
2028 IF_ADDR_RUNLOCK(ifp);
2032 ifa_ref((struct ifaddr *)dep[1]);
2033 IF_ADDR_RUNLOCK(ifp);
2037 IF_ADDR_RUNLOCK(ifp);
2042 * perform DAD when interface becomes IFF_UP.
2045 in6_if_up(struct ifnet *ifp)
2048 struct in6_ifaddr *ia;
2051 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2052 if (ifa->ifa_addr->sa_family != AF_INET6)
2054 ia = (struct in6_ifaddr *)ifa;
2055 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2057 * The TENTATIVE flag was likely set by hand
2058 * beforehand, implicitly indicating the need for DAD.
2059 * We may be able to skip the random delay in this
2060 * case, but we impose delays just in case.
2063 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2066 IF_ADDR_RUNLOCK(ifp);
2069 * special cases, like 6to4, are handled in in6_ifattach
2071 in6_ifattach(ifp, NULL);
2075 in6if_do_dad(struct ifnet *ifp)
2077 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2080 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2083 switch (ifp->if_type) {
2089 * These interfaces do not have the IFF_LOOPBACK flag,
2090 * but loop packets back. We do not have to do DAD on such
2091 * interfaces. We should even omit it, because loop-backed
2092 * NS would confuse the DAD procedure.
2097 * Our DAD routine requires the interface up and running.
2098 * However, some interfaces can be up before the RUNNING
2099 * status. Additionaly, users may try to assign addresses
2100 * before the interface becomes up (or running).
2101 * We simply skip DAD in such a case as a work around.
2102 * XXX: we should rather mark "tentative" on such addresses,
2103 * and do DAD after the interface becomes ready.
2105 if (!((ifp->if_flags & IFF_UP) &&
2106 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2114 * Calculate max IPv6 MTU through all the interfaces and store it
2120 unsigned long maxmtu = 0;
2123 IFNET_RLOCK_NOSLEEP();
2124 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2125 /* this function can be called during ifnet initialization */
2126 if (!ifp->if_afdata[AF_INET6])
2128 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2129 IN6_LINKMTU(ifp) > maxmtu)
2130 maxmtu = IN6_LINKMTU(ifp);
2132 IFNET_RUNLOCK_NOSLEEP();
2133 if (maxmtu) /* update only when maxmtu is positive */
2134 V_in6_maxmtu = maxmtu;
2138 * Provide the length of interface identifiers to be used for the link attached
2139 * to the given interface. The length should be defined in "IPv6 over
2140 * xxx-link" document. Note that address architecture might also define
2141 * the length for a particular set of address prefixes, regardless of the
2142 * link type. As clarified in rfc2462bis, those two definitions should be
2143 * consistent, and those really are as of August 2004.
2146 in6_if2idlen(struct ifnet *ifp)
2148 switch (ifp->if_type) {
2149 case IFT_ETHER: /* RFC2464 */
2150 #ifdef IFT_PROPVIRTUAL
2151 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2154 case IFT_L2VLAN: /* ditto */
2156 #ifdef IFT_IEEE80211
2157 case IFT_IEEE80211: /* ditto */
2160 case IFT_MIP: /* ditto */
2162 case IFT_INFINIBAND:
2164 case IFT_FDDI: /* RFC2467 */
2166 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2168 case IFT_PPP: /* RFC2472 */
2170 case IFT_ARCNET: /* RFC2497 */
2172 case IFT_FRELAY: /* RFC2590 */
2174 case IFT_IEEE1394: /* RFC3146 */
2177 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2179 return (64); /* XXX: is this really correct? */
2182 * Unknown link type:
2183 * It might be controversial to use the today's common constant
2184 * of 64 for these cases unconditionally. For full compliance,
2185 * we should return an error in this case. On the other hand,
2186 * if we simply miss the standard for the link type or a new
2187 * standard is defined for a new link type, the IFID length
2188 * is very likely to be the common constant. As a compromise,
2189 * we always use the constant, but make an explicit notice
2190 * indicating the "unknown" case.
2192 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2197 #include <sys/sysctl.h>
2199 struct in6_llentry {
2200 struct llentry base;
2201 struct sockaddr_in6 l3_addr6;
2205 * Deletes an address from the address table.
2206 * This function is called by the timer functions
2207 * such as arptimer() and nd6_llinfo_timer(), and
2208 * the caller does the locking.
2211 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2214 LLE_LOCK_DESTROY(lle);
2215 free(lle, M_LLTABLE);
2218 static struct llentry *
2219 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2221 struct in6_llentry *lle;
2223 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2224 if (lle == NULL) /* NB: caller generates msg */
2227 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2228 lle->base.lle_refcnt = 1;
2229 lle->base.lle_free = in6_lltable_free;
2230 LLE_LOCK_INIT(&lle->base);
2231 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2232 CALLOUT_RETURNUNLOCKED);
2234 return (&lle->base);
2238 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2239 const struct sockaddr *mask, u_int flags)
2241 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2242 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2243 struct llentry *lle, *next;
2247 * (flags & LLE_STATIC) means deleting all entries
2248 * including static ND6 entries.
2250 IF_AFDATA_WLOCK(llt->llt_ifp);
2251 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2252 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2253 if (IN6_ARE_MASKED_ADDR_EQUAL(
2254 &satosin6(L3_ADDR(lle))->sin6_addr,
2255 &pfx->sin6_addr, &msk->sin6_addr) &&
2256 ((flags & LLE_STATIC) ||
2257 !(lle->la_flags & LLE_STATIC))) {
2259 if (callout_stop(&lle->la_timer))
2265 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2269 in6_lltable_rtcheck(struct ifnet *ifp,
2271 const struct sockaddr *l3addr)
2274 char ip6buf[INET6_ADDRSTRLEN];
2276 KASSERT(l3addr->sa_family == AF_INET6,
2277 ("sin_family %d", l3addr->sa_family));
2279 /* Our local addresses are always only installed on the default FIB. */
2280 /* XXX rtalloc1 should take a const param */
2281 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2283 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2286 * Create an ND6 cache for an IPv6 neighbor
2287 * that is not covered by our own prefix.
2289 /* XXX ifaof_ifpforaddr should take a const param */
2290 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2297 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2298 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2307 static struct llentry *
2308 in6_lltable_lookup(struct lltable *llt, u_int flags,
2309 const struct sockaddr *l3addr)
2311 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2312 struct ifnet *ifp = llt->llt_ifp;
2313 struct llentry *lle;
2314 struct llentries *lleh;
2317 IF_AFDATA_LOCK_ASSERT(ifp);
2318 KASSERT(l3addr->sa_family == AF_INET6,
2319 ("sin_family %d", l3addr->sa_family));
2321 hashkey = sin6->sin6_addr.s6_addr32[3];
2322 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2323 LIST_FOREACH(lle, lleh, lle_next) {
2324 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2325 if (lle->la_flags & LLE_DELETED)
2327 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2328 sizeof(struct in6_addr)) == 0)
2333 if (!(flags & LLE_CREATE))
2336 * A route that covers the given address must have
2337 * been installed 1st because we are doing a resolution,
2340 if (!(flags & LLE_IFADDR) &&
2341 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2344 lle = in6_lltable_new(l3addr, flags);
2346 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2349 lle->la_flags = flags & ~LLE_CREATE;
2350 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2351 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2352 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2356 lle->lle_head = lleh;
2357 lle->la_flags |= LLE_LINKED;
2358 LIST_INSERT_HEAD(lleh, lle, lle_next);
2359 } else if (flags & LLE_DELETE) {
2360 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2362 lle->la_flags |= LLE_DELETED;
2364 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2366 if ((lle->la_flags &
2367 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2374 if (LLE_IS_VALID(lle)) {
2375 if (flags & LLE_EXCLUSIVE)
2384 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2386 struct ifnet *ifp = llt->llt_ifp;
2387 struct llentry *lle;
2390 struct rt_msghdr rtm;
2391 struct sockaddr_in6 sin6;
2393 * ndp.c assumes that sdl is word aligned
2398 struct sockaddr_dl sdl;
2402 if (ifp->if_flags & IFF_LOOPBACK)
2405 LLTABLE_LOCK_ASSERT();
2408 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2409 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2410 struct sockaddr_dl *sdl;
2412 /* skip deleted or invalid entries */
2413 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2415 /* Skip if jailed and not a valid IP of the prison. */
2416 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2419 * produce a msg made of:
2421 * struct sockaddr_in6 (IPv6)
2422 * struct sockaddr_dl;
2424 bzero(&ndpc, sizeof(ndpc));
2425 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2426 ndpc.rtm.rtm_version = RTM_VERSION;
2427 ndpc.rtm.rtm_type = RTM_GET;
2428 ndpc.rtm.rtm_flags = RTF_UP;
2429 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2430 ndpc.sin6.sin6_family = AF_INET6;
2431 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2432 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2433 if (V_deembed_scopeid)
2434 sa6_recoverscope(&ndpc.sin6);
2437 if (lle->la_flags & LLE_PUB)
2438 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2441 sdl->sdl_family = AF_LINK;
2442 sdl->sdl_len = sizeof(*sdl);
2443 sdl->sdl_alen = ifp->if_addrlen;
2444 sdl->sdl_index = ifp->if_index;
2445 sdl->sdl_type = ifp->if_type;
2446 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2447 ndpc.rtm.rtm_rmx.rmx_expire =
2448 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2449 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2450 if (lle->la_flags & LLE_STATIC)
2451 ndpc.rtm.rtm_flags |= RTF_STATIC;
2452 ndpc.rtm.rtm_index = ifp->if_index;
2453 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2462 in6_domifattach(struct ifnet *ifp)
2464 struct in6_ifextra *ext;
2466 /* There are not IPv6-capable interfaces. */
2467 switch (ifp->if_type) {
2473 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2474 bzero(ext, sizeof(*ext));
2476 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2477 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2478 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2479 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2481 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2482 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2484 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2485 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2487 ext->nd_ifinfo = nd6_ifattach(ifp);
2488 ext->scope6_id = scope6_ifattach(ifp);
2489 ext->lltable = lltable_init(ifp, AF_INET6);
2490 if (ext->lltable != NULL) {
2491 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2492 ext->lltable->llt_lookup = in6_lltable_lookup;
2493 ext->lltable->llt_dump = in6_lltable_dump;
2496 ext->mld_ifinfo = mld_domifattach(ifp);
2502 in6_domifdetach(struct ifnet *ifp, void *aux)
2504 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2506 mld_domifdetach(ifp);
2507 scope6_ifdetach(ext->scope6_id);
2508 nd6_ifdetach(ext->nd_ifinfo);
2509 lltable_free(ext->lltable);
2510 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2511 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2512 free(ext->in6_ifstat, M_IFADDR);
2513 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2514 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2515 free(ext->icmp6_ifstat, M_IFADDR);
2516 free(ext, M_IFADDR);
2520 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2521 * v4 mapped addr or v4 compat addr
2524 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2527 bzero(sin, sizeof(*sin));
2528 sin->sin_len = sizeof(struct sockaddr_in);
2529 sin->sin_family = AF_INET;
2530 sin->sin_port = sin6->sin6_port;
2531 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2534 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2536 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2538 bzero(sin6, sizeof(*sin6));
2539 sin6->sin6_len = sizeof(struct sockaddr_in6);
2540 sin6->sin6_family = AF_INET6;
2541 sin6->sin6_port = sin->sin_port;
2542 sin6->sin6_addr.s6_addr32[0] = 0;
2543 sin6->sin6_addr.s6_addr32[1] = 0;
2544 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2545 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2548 /* Convert sockaddr_in6 into sockaddr_in. */
2550 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2552 struct sockaddr_in *sin_p;
2553 struct sockaddr_in6 sin6;
2556 * Save original sockaddr_in6 addr and convert it
2559 sin6 = *(struct sockaddr_in6 *)nam;
2560 sin_p = (struct sockaddr_in *)nam;
2561 in6_sin6_2_sin(sin_p, &sin6);
2564 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2566 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2568 struct sockaddr_in *sin_p;
2569 struct sockaddr_in6 *sin6_p;
2571 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2572 sin_p = (struct sockaddr_in *)*nam;
2573 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2574 free(*nam, M_SONAME);
2575 *nam = (struct sockaddr *)sin6_p;