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>
84 #include <sys/rmlock.h>
85 #include <sys/syslog.h>
88 #include <net/if_var.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
91 #include <net/if_dl.h>
94 #include <netinet/in.h>
95 #include <netinet/in_var.h>
96 #include <net/if_llatbl.h>
97 #include <netinet/if_ether.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/ip.h>
100 #include <netinet/in_pcb.h>
101 #include <netinet/ip_carp.h>
103 #include <netinet/ip6.h>
104 #include <netinet6/ip6_var.h>
105 #include <netinet6/nd6.h>
106 #include <netinet6/mld6_var.h>
107 #include <netinet6/ip6_mroute.h>
108 #include <netinet6/in6_ifattach.h>
109 #include <netinet6/scope6_var.h>
110 #include <netinet6/in6_pcb.h>
112 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
113 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
116 * Definitions of some costant IP6 addresses.
118 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
119 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
120 const struct in6_addr in6addr_nodelocal_allnodes =
121 IN6ADDR_NODELOCAL_ALLNODES_INIT;
122 const struct in6_addr in6addr_linklocal_allnodes =
123 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
124 const struct in6_addr in6addr_linklocal_allrouters =
125 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
126 const struct in6_addr in6addr_linklocal_allv2routers =
127 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
129 const struct in6_addr in6mask0 = IN6MASK0;
130 const struct in6_addr in6mask32 = IN6MASK32;
131 const struct in6_addr in6mask64 = IN6MASK64;
132 const struct in6_addr in6mask96 = IN6MASK96;
133 const struct in6_addr in6mask128 = IN6MASK128;
135 const struct sockaddr_in6 sa6_any =
136 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
138 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
139 struct in6_aliasreq *, int);
140 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
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:
284 case SIOCGNBRINFO_IN6:
285 case SIOCGDEFIFACE_IN6:
286 return (nd6_ioctl(cmd, data, ifp));
288 #ifdef COMPAT_FREEBSD32
289 case SIOCGDEFIFACE32_IN6:
291 struct in6_ndifreq ndif;
292 struct in6_ndifreq32 *ndif32;
294 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
298 ndif32 = (struct in6_ndifreq32 *)data;
299 ndif32->ifindex = ndif.ifindex;
306 case SIOCSIFPREFIX_IN6:
307 case SIOCDIFPREFIX_IN6:
308 case SIOCAIFPREFIX_IN6:
309 case SIOCCIFPREFIX_IN6:
310 case SIOCSGIFPREFIX_IN6:
311 case SIOCGIFPREFIX_IN6:
313 "prefix ioctls are now invalidated. "
314 "please use ifconfig.\n");
321 error = priv_check(td, PRIV_NETINET_SCOPE6);
328 return (scope6_ioctl(cmd, data, ifp));
332 * Find address for this interface, if it exists.
334 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
335 * only, and used the first interface address as the target of other
336 * operations (without checking ifra_addr). This was because netinet
337 * code/API assumed at most 1 interface address per interface.
338 * Since IPv6 allows a node to assign multiple addresses
339 * on a single interface, we almost always look and check the
340 * presence of ifra_addr, and reject invalid ones here.
341 * It also decreases duplicated code among SIOC*_IN6 operations.
344 case SIOCAIFADDR_IN6:
345 case SIOCSIFPHYADDR_IN6:
346 sa6 = &ifra->ifra_addr;
348 case SIOCSIFADDR_IN6:
349 case SIOCGIFADDR_IN6:
350 case SIOCSIFDSTADDR_IN6:
351 case SIOCSIFNETMASK_IN6:
352 case SIOCGIFDSTADDR_IN6:
353 case SIOCGIFNETMASK_IN6:
354 case SIOCDIFADDR_IN6:
355 case SIOCGIFPSRCADDR_IN6:
356 case SIOCGIFPDSTADDR_IN6:
357 case SIOCGIFAFLAG_IN6:
358 case SIOCSNDFLUSH_IN6:
359 case SIOCSPFXFLUSH_IN6:
360 case SIOCSRTRFLUSH_IN6:
361 case SIOCGIFALIFETIME_IN6:
362 case SIOCSIFALIFETIME_IN6:
363 case SIOCGIFSTAT_IN6:
364 case SIOCGIFSTAT_ICMP6:
365 sa6 = &ifr->ifr_addr;
372 * Although we should pass any non-INET6 ioctl requests
373 * down to driver, we filter some legacy INET requests.
374 * Drivers trust SIOCSIFADDR et al to come from an already
375 * privileged layer, and do not perform any credentials
376 * checks or input validation.
383 if (sa6 && sa6->sin6_family == AF_INET6) {
384 if (sa6->sin6_scope_id != 0)
385 error = sa6_embedscope(sa6, 0);
387 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
390 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
391 &sa6->sin6_addr)) != 0)
393 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
398 case SIOCSIFADDR_IN6:
399 case SIOCSIFDSTADDR_IN6:
400 case SIOCSIFNETMASK_IN6:
402 * Since IPv6 allows a node to assign multiple addresses
403 * on a single interface, SIOCSIFxxx ioctls are deprecated.
405 /* we decided to obsolete this command (20000704) */
409 case SIOCDIFADDR_IN6:
411 * for IPv4, we look for existing in_ifaddr here to allow
412 * "ifconfig if0 delete" to remove the first IPv4 address on
413 * the interface. For IPv6, as the spec allows multiple
414 * interface address from the day one, we consider "remove the
415 * first one" semantics to be not preferable.
418 error = EADDRNOTAVAIL;
422 case SIOCAIFADDR_IN6:
424 * We always require users to specify a valid IPv6 address for
425 * the corresponding operation.
427 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
428 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
429 error = EAFNOSUPPORT;
434 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
435 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
440 case SIOCGIFSTAT_IN6:
441 case SIOCGIFSTAT_ICMP6:
442 if (ifp->if_afdata[AF_INET6] == NULL) {
443 error = EPFNOSUPPORT;
448 case SIOCGIFADDR_IN6:
449 /* This interface is basically deprecated. use SIOCGIFCONF. */
451 case SIOCGIFAFLAG_IN6:
452 case SIOCGIFNETMASK_IN6:
453 case SIOCGIFDSTADDR_IN6:
454 case SIOCGIFALIFETIME_IN6:
455 /* must think again about its semantics */
457 error = EADDRNOTAVAIL;
462 case SIOCSIFALIFETIME_IN6:
464 struct in6_addrlifetime *lt;
467 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
472 error = EADDRNOTAVAIL;
475 /* sanity for overflow - beware unsigned */
476 lt = &ifr->ifr_ifru.ifru_lifetime;
477 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
478 lt->ia6t_vltime + time_uptime < time_uptime) {
482 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
483 lt->ia6t_pltime + time_uptime < time_uptime) {
492 case SIOCGIFADDR_IN6:
493 ifr->ifr_addr = ia->ia_addr;
494 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
498 case SIOCGIFDSTADDR_IN6:
499 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
504 * XXX: should we check if ifa_dstaddr is NULL and return
507 ifr->ifr_dstaddr = ia->ia_dstaddr;
508 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
512 case SIOCGIFNETMASK_IN6:
513 ifr->ifr_addr = ia->ia_prefixmask;
516 case SIOCGIFAFLAG_IN6:
517 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
520 case SIOCGIFSTAT_IN6:
521 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
522 ifp->if_afdata[AF_INET6])->in6_ifstat,
523 &ifr->ifr_ifru.ifru_stat,
524 sizeof(struct in6_ifstat) / sizeof(uint64_t));
527 case SIOCGIFSTAT_ICMP6:
528 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
529 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
530 &ifr->ifr_ifru.ifru_icmp6stat,
531 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
534 case SIOCGIFALIFETIME_IN6:
535 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
536 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
538 struct in6_addrlifetime *retlt =
539 &ifr->ifr_ifru.ifru_lifetime;
542 * XXX: adjust expiration time assuming time_t is
546 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
547 if (ia->ia6_lifetime.ia6t_vltime <
548 maxexpire - ia->ia6_updatetime) {
549 retlt->ia6t_expire = ia->ia6_updatetime +
550 ia->ia6_lifetime.ia6t_vltime;
552 retlt->ia6t_expire = maxexpire;
554 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
556 struct in6_addrlifetime *retlt =
557 &ifr->ifr_ifru.ifru_lifetime;
560 * XXX: adjust expiration time assuming time_t is
564 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
565 if (ia->ia6_lifetime.ia6t_pltime <
566 maxexpire - ia->ia6_updatetime) {
567 retlt->ia6t_preferred = ia->ia6_updatetime +
568 ia->ia6_lifetime.ia6t_pltime;
570 retlt->ia6t_preferred = maxexpire;
574 case SIOCSIFALIFETIME_IN6:
575 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
577 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
578 ia->ia6_lifetime.ia6t_expire =
579 time_uptime + ia->ia6_lifetime.ia6t_vltime;
581 ia->ia6_lifetime.ia6t_expire = 0;
582 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
583 ia->ia6_lifetime.ia6t_preferred =
584 time_uptime + ia->ia6_lifetime.ia6t_pltime;
586 ia->ia6_lifetime.ia6t_preferred = 0;
589 case SIOCAIFADDR_IN6:
591 struct nd_prefixctl pr0;
592 struct nd_prefix *pr;
595 * first, make or update the interface address structure,
596 * and link it to the list.
598 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
601 ifa_free(&ia->ia_ifa);
602 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
605 * this can happen when the user specify the 0 valid
611 if (cmd == ocmd && ifra->ifra_vhid > 0) {
612 if (carp_attach_p != NULL)
613 error = (*carp_attach_p)(&ia->ia_ifa,
616 error = EPROTONOSUPPORT;
624 * then, make the prefix on-link on the interface.
625 * XXX: we'd rather create the prefix before the address, but
626 * we need at least one address to install the corresponding
627 * interface route, so we configure the address first.
631 * convert mask to prefix length (prefixmask has already
632 * been validated in in6_update_ifa().
634 bzero(&pr0, sizeof(pr0));
636 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
638 if (pr0.ndpr_plen == 128) {
639 /* we don't need to install a host route. */
642 pr0.ndpr_prefix = ifra->ifra_addr;
643 /* apply the mask for safety. */
644 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
645 &ifra->ifra_prefixmask.sin6_addr);
648 * XXX: since we don't have an API to set prefix (not address)
649 * lifetimes, we just use the same lifetimes as addresses.
650 * The (temporarily) installed lifetimes can be overridden by
651 * later advertised RAs (when accept_rtadv is non 0), which is
652 * an intended behavior.
654 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
656 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
657 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
658 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
660 /* add the prefix if not yet. */
661 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
663 * nd6_prelist_add will install the corresponding
666 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
668 (*carp_detach_p)(&ia->ia_ifa);
673 (*carp_detach_p)(&ia->ia_ifa);
674 log(LOG_ERR, "nd6_prelist_add succeeded but "
681 /* relate the address to the prefix */
682 if (ia->ia6_ndpr == NULL) {
687 * If this is the first autoconf address from the
688 * prefix, create a temporary address as well
691 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
692 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
694 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
695 log(LOG_NOTICE, "in6_control: failed "
696 "to create a temporary address, "
703 * this might affect the status of autoconfigured addresses,
704 * that is, this address might make other addresses detached.
706 pfxlist_onlink_check();
708 if (error != 0 || ia == NULL)
711 * Try to clear the flag when a new IPv6 address is added
712 * onto an IFDISABLED interface and it succeeds.
714 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
715 struct in6_ndireq nd;
717 memset(&nd, 0, sizeof(nd));
718 nd.ndi.flags = ND_IFINFO(ifp)->flags;
719 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
720 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
721 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
722 "SIOCSIFINFO_FLAGS for -ifdisabled "
725 * Ignore failure of clearing the flag intentionally.
726 * The failure means address duplication was detected.
729 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
733 case SIOCDIFADDR_IN6:
735 struct nd_prefix *pr;
738 * If the address being deleted is the only one that owns
739 * the corresponding prefix, expire the prefix as well.
740 * XXX: theoretically, we don't have to worry about such
741 * relationship, since we separate the address management
742 * and the prefix management. We do this, however, to provide
743 * as much backward compatibility as possible in terms of
744 * the ioctl operation.
745 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
748 in6_purgeaddr(&ia->ia_ifa);
749 if (pr && pr->ndpr_refcnt == 0)
751 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
756 if (ifp->if_ioctl == NULL) {
760 error = (*ifp->if_ioctl)(ifp, cmd, data);
767 ifa_free(&ia->ia_ifa);
773 * Join necessary multicast groups. Factored out from in6_update_ifa().
774 * This entire work should only be done once, for the default FIB.
777 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
778 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
780 char ip6buf[INET6_ADDRSTRLEN];
781 struct in6_addr mltaddr;
782 struct in6_multi_mship *imm;
785 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
787 /* Join solicited multicast addr for new host id. */
788 bzero(&mltaddr, sizeof(struct in6_addr));
789 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
790 mltaddr.s6_addr32[2] = htonl(1);
791 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
792 mltaddr.s6_addr8[12] = 0xff;
793 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
794 /* XXX: should not happen */
795 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
799 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
801 * We need a random delay for DAD on the address being
802 * configured. It also means delaying transmission of the
803 * corresponding MLD report to avoid report collision.
804 * [RFC 4861, Section 6.3.7]
806 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
808 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
810 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
811 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
812 if_name(ifp), error));
815 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
816 *in6m_sol = imm->i6mm_maddr;
819 * Join link-local all-nodes address.
821 mltaddr = in6addr_linklocal_allnodes;
822 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
823 goto cleanup; /* XXX: should not fail */
825 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
827 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
828 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
829 if_name(ifp), error));
832 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
835 * Join node information group address.
838 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
840 * The spec does not say anything about delay for this group,
841 * but the same logic should apply.
843 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
845 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
847 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
850 "%s: in6_joingroup failed for %s on %s "
851 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
852 &mltaddr), if_name(ifp), error));
853 /* XXX not very fatal, go on... */
855 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
857 if (V_icmp6_nodeinfo_oldmcprefix &&
858 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
859 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
862 "%s: in6_joingroup failed for %s on %s "
863 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
864 &mltaddr), if_name(ifp), error));
865 /* XXX not very fatal, go on... */
867 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
871 * Join interface-local all-nodes address.
872 * (ff01::1%ifN, and ff01::%ifN/32)
874 mltaddr = in6addr_nodelocal_allnodes;
875 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
876 goto cleanup; /* XXX: should not fail */
878 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
880 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
881 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
882 &mltaddr), if_name(ifp), error));
885 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
892 * Update parameters of an IPv6 interface address.
893 * If necessary, a new entry is created and linked into address chains.
894 * This function is separated from in6_control().
897 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
898 struct in6_ifaddr *ia, int flags)
900 int error, hostIsNew = 0;
902 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
907 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
911 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
913 if (hostIsNew != 0) {
914 in6_unlink_ifa(ia, ifp);
915 ifa_free(&ia->ia_ifa);
921 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
927 * Fill in basic IPv6 address request info.
930 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
931 const struct in6_addr *mask)
934 memset(ifra, 0, sizeof(struct in6_aliasreq));
936 ifra->ifra_addr.sin6_family = AF_INET6;
937 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
939 ifra->ifra_addr.sin6_addr = *addr;
941 ifra->ifra_prefixmask.sin6_family = AF_INET6;
942 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
944 ifra->ifra_prefixmask.sin6_addr = *mask;
948 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
949 struct in6_ifaddr *ia, int flags)
952 struct sockaddr_in6 dst6;
953 struct in6_addrlifetime *lt;
954 char ip6buf[INET6_ADDRSTRLEN];
956 /* Validate parameters */
957 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
961 * The destination address for a p2p link must have a family
962 * of AF_UNSPEC or AF_INET6.
964 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
965 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
966 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
967 return (EAFNOSUPPORT);
972 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
973 ifra->ifra_addr.sin6_family != AF_INET6)
977 * validate ifra_prefixmask. don't check sin6_family, netmask
978 * does not carry fields other than sin6_len.
980 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
983 * Because the IPv6 address architecture is classless, we require
984 * users to specify a (non 0) prefix length (mask) for a new address.
985 * We also require the prefix (when specified) mask is valid, and thus
986 * reject a non-consecutive mask.
988 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
990 if (ifra->ifra_prefixmask.sin6_len != 0) {
991 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
992 (u_char *)&ifra->ifra_prefixmask +
993 ifra->ifra_prefixmask.sin6_len);
998 * In this case, ia must not be NULL. We just use its prefix
1001 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1004 * If the destination address on a p2p interface is specified,
1005 * and the address is a scoped one, validate/set the scope
1008 dst6 = ifra->ifra_dstaddr;
1009 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1010 (dst6.sin6_family == AF_INET6)) {
1011 struct in6_addr in6_tmp;
1014 in6_tmp = dst6.sin6_addr;
1015 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1016 return (EINVAL); /* XXX: should be impossible */
1018 if (dst6.sin6_scope_id != 0) {
1019 if (dst6.sin6_scope_id != zoneid)
1021 } else /* user omit to specify the ID. */
1022 dst6.sin6_scope_id = zoneid;
1024 /* convert into the internal form */
1025 if (sa6_embedscope(&dst6, 0))
1026 return (EINVAL); /* XXX: should be impossible */
1028 /* Modify original ifra_dstaddr to reflect changes */
1029 ifra->ifra_dstaddr = dst6;
1032 * The destination address can be specified only for a p2p or a
1033 * loopback interface. If specified, the corresponding prefix length
1036 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1037 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1038 /* XXX: noisy message */
1039 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1040 "be specified for a p2p or a loopback IF only\n"));
1044 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1045 "be 128 when dstaddr is specified\n"));
1049 /* lifetime consistency check */
1050 lt = &ifra->ifra_lifetime;
1051 if (lt->ia6t_pltime > lt->ia6t_vltime)
1053 if (lt->ia6t_vltime == 0) {
1055 * the following log might be noisy, but this is a typical
1056 * configuration mistake or a tool's bug.
1059 "in6_update_ifa: valid lifetime is 0 for %s\n",
1060 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1063 return (0); /* there's nothing to do */
1066 /* Check prefix mask */
1067 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1069 * We prohibit changing the prefix length of an existing
1071 * + such an operation should be rare in IPv6, and
1072 * + the operation would confuse prefix management.
1074 if (ia->ia_prefixmask.sin6_len != 0 &&
1075 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1076 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1077 "of an existing %s address should not be changed\n",
1078 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1089 * Allocate a new ifaddr and link it into chains.
1091 static struct in6_ifaddr *
1092 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1094 struct in6_ifaddr *ia;
1097 * When in6_alloc_ifa() is called in a process of a received
1098 * RA, it is called under an interrupt context. So, we should
1099 * call malloc with M_NOWAIT.
1101 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1104 LIST_INIT(&ia->ia6_memberships);
1105 /* Initialize the address and masks, and put time stamp */
1106 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1107 ia->ia_addr.sin6_family = AF_INET6;
1108 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1109 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1110 ia->ia_addr = ifra->ifra_addr;
1111 ia->ia6_createtime = time_uptime;
1112 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1114 * Some functions expect that ifa_dstaddr is not
1115 * NULL for p2p interfaces.
1117 ia->ia_ifa.ifa_dstaddr =
1118 (struct sockaddr *)&ia->ia_dstaddr;
1120 ia->ia_ifa.ifa_dstaddr = NULL;
1123 /* set prefix mask if any */
1124 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1125 if (ifra->ifra_prefixmask.sin6_len != 0) {
1126 ia->ia_prefixmask.sin6_family = AF_INET6;
1127 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1128 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1132 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1134 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1135 IF_ADDR_WUNLOCK(ifp);
1137 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1139 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1140 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1141 IN6_IFADDR_WUNLOCK();
1147 * Update/configure interface address parameters:
1149 * 1) Update lifetime
1150 * 2) Update interface metric ad flags
1151 * 3) Notify other subsystems
1154 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1155 struct in6_ifaddr *ia, int hostIsNew, int flags)
1159 /* update timestamp */
1160 ia->ia6_updatetime = time_uptime;
1163 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1164 * to see if the address is deprecated or invalidated, but initialize
1165 * these members for applications.
1167 ia->ia6_lifetime = ifra->ifra_lifetime;
1168 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1169 ia->ia6_lifetime.ia6t_expire =
1170 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1172 ia->ia6_lifetime.ia6t_expire = 0;
1173 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1174 ia->ia6_lifetime.ia6t_preferred =
1175 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1177 ia->ia6_lifetime.ia6t_preferred = 0;
1180 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1181 * userland, make it deprecated.
1183 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1184 ia->ia6_lifetime.ia6t_pltime = 0;
1185 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1189 * configure address flags.
1191 ia->ia6_flags = ifra->ifra_flags;
1194 * Make the address tentative before joining multicast addresses,
1195 * so that corresponding MLD responses would not have a tentative
1198 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1201 * DAD should be performed for an new address or addresses on
1202 * an interface with ND6_IFF_IFDISABLED.
1204 if (in6if_do_dad(ifp) &&
1205 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1206 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1208 /* notify other subsystems */
1209 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1215 * Do link-level ifa job:
1216 * 1) Add lle entry for added address
1217 * 2) Notifies routing socket users about new address
1218 * 3) join appropriate multicast group
1219 * 4) start DAD if enabled
1222 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1223 struct in6_ifaddr *ia, int flags)
1225 struct in6_multi *in6m_sol;
1228 /* Add local address to lltable, if necessary (ex. on p2p link). */
1229 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1230 in6_purgeaddr(&ia->ia_ifa);
1231 ifa_free(&ia->ia_ifa);
1235 /* Join necessary multicast groups. */
1237 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1238 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1240 in6_purgeaddr(&ia->ia_ifa);
1241 ifa_free(&ia->ia_ifa);
1246 /* Perform DAD, if the address is TENTATIVE. */
1247 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1248 int delay, mindelay, maxdelay;
1251 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1253 * We need to impose a delay before sending an NS
1254 * for DAD. Check if we also needed a delay for the
1255 * corresponding MLD message. If we did, the delay
1256 * should be larger than the MLD delay (this could be
1257 * relaxed a bit, but this simple logic is at least
1259 * XXX: Break data hiding guidelines and look at
1260 * state for the solicited multicast group.
1263 if (in6m_sol != NULL &&
1264 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1265 mindelay = in6m_sol->in6m_timer;
1267 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1268 if (maxdelay - mindelay == 0)
1272 (arc4random() % (maxdelay - mindelay)) +
1276 nd6_dad_start((struct ifaddr *)ia, delay);
1279 in6_newaddrmsg(ia, RTM_ADD);
1280 ifa_free(&ia->ia_ifa);
1285 in6_purgeaddr(struct ifaddr *ifa)
1287 struct ifnet *ifp = ifa->ifa_ifp;
1288 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1289 struct in6_multi_mship *imm;
1293 (*carp_detach_p)(ifa);
1296 * Remove the loopback route to the interface address.
1297 * The check for the current setting of "nd6_useloopback"
1300 if (ia->ia_flags & IFA_RTSELF) {
1301 error = ifa_del_loopback_route((struct ifaddr *)ia,
1302 (struct sockaddr *)&ia->ia_addr);
1304 ia->ia_flags &= ~IFA_RTSELF;
1307 /* stop DAD processing */
1310 /* Remove local address entry from lltable. */
1311 nd6_rem_ifa_lle(ia);
1313 /* Leave multicast groups. */
1314 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1315 LIST_REMOVE(imm, i6mm_chain);
1316 in6_leavegroup(imm);
1318 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1319 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1320 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1321 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1323 log(LOG_INFO, "%s: err=%d, destination address delete "
1324 "failed\n", __func__, error);
1325 ia->ia_flags &= ~IFA_ROUTE;
1328 in6_newaddrmsg(ia, RTM_DELETE);
1329 in6_unlink_ifa(ia, ifp);
1333 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1335 char ip6buf[INET6_ADDRSTRLEN];
1338 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1339 IF_ADDR_WUNLOCK(ifp);
1340 ifa_free(&ia->ia_ifa); /* if_addrhead */
1343 * Defer the release of what might be the last reference to the
1344 * in6_ifaddr so that it can't be freed before the remainder of the
1348 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1349 LIST_REMOVE(ia, ia6_hash);
1350 IN6_IFADDR_WUNLOCK();
1353 * Release the reference to the base prefix. There should be a
1354 * positive reference.
1356 if (ia->ia6_ndpr == NULL) {
1358 "in6_unlink_ifa: autoconf'ed address "
1359 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1361 ia->ia6_ndpr->ndpr_refcnt--;
1362 ia->ia6_ndpr = NULL;
1366 * Also, if the address being removed is autoconf'ed, call
1367 * pfxlist_onlink_check() since the release might affect the status of
1368 * other (detached) addresses.
1370 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1371 pfxlist_onlink_check();
1373 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1377 * Notifies other subsystems about address change/arrival:
1378 * 1) Notifies device handler on the first IPv6 address assignment
1379 * 2) Handle routing table changes for P2P links and route
1380 * 3) Handle routing table changes for address host route
1383 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1384 struct in6_aliasreq *ifra, int hostIsNew)
1386 int error = 0, plen, ifacount = 0;
1388 struct sockaddr_in6 *pdst;
1389 char ip6buf[INET6_ADDRSTRLEN];
1392 * Give the interface a chance to initialize
1393 * if this is its first address,
1395 if (hostIsNew != 0) {
1397 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1398 if (ifa->ifa_addr->sa_family != AF_INET6)
1402 IF_ADDR_RUNLOCK(ifp);
1405 if (ifacount <= 1 && ifp->if_ioctl) {
1406 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1412 * If a new destination address is specified, scrub the old one and
1413 * install the new destination. Note that the interface must be
1416 pdst = &ifra->ifra_dstaddr;
1417 if (pdst->sin6_family == AF_INET6 &&
1418 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1419 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1420 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1421 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1422 "remove a route to the old destination: %s\n",
1423 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1424 /* proceed anyway... */
1426 ia->ia_flags &= ~IFA_ROUTE;
1427 ia->ia_dstaddr = *pdst;
1431 * If a new destination address is specified for a point-to-point
1432 * interface, install a route to the destination as an interface
1434 * XXX: the logic below rejects assigning multiple addresses on a p2p
1435 * interface that share the same destination.
1437 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1438 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1439 ia->ia_dstaddr.sin6_family == AF_INET6) {
1440 int rtflags = RTF_UP | RTF_HOST;
1442 * Handle the case for ::1 .
1444 if (ifp->if_flags & IFF_LOOPBACK)
1445 ia->ia_flags |= IFA_RTSELF;
1446 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1449 ia->ia_flags |= IFA_ROUTE;
1453 * add a loopback route to self if not exists
1455 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1456 error = ifa_add_loopback_route((struct ifaddr *)ia,
1457 (struct sockaddr *)&ia->ia_addr);
1459 ia->ia_flags |= IFA_RTSELF;
1466 * Find an IPv6 interface link-local address specific to an interface.
1467 * ifaddr is returned referenced.
1470 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1475 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1476 if (ifa->ifa_addr->sa_family != AF_INET6)
1478 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1479 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1486 IF_ADDR_RUNLOCK(ifp);
1488 return ((struct in6_ifaddr *)ifa);
1493 * find the internet address corresponding to a given address.
1494 * ifaddr is returned referenced.
1497 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1499 struct rm_priotracker in6_ifa_tracker;
1500 struct in6_ifaddr *ia;
1502 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1503 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1504 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1506 zoneid != ia->ia_addr.sin6_scope_id)
1508 ifa_ref(&ia->ia_ifa);
1512 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1517 * find the internet address corresponding to a given interface and address.
1518 * ifaddr is returned referenced.
1521 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1526 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1527 if (ifa->ifa_addr->sa_family != AF_INET6)
1529 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1534 IF_ADDR_RUNLOCK(ifp);
1536 return ((struct in6_ifaddr *)ifa);
1540 * Find a link-local scoped address on ifp and return it if any.
1543 in6ifa_llaonifp(struct ifnet *ifp)
1545 struct sockaddr_in6 *sin6;
1548 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1551 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1552 if (ifa->ifa_addr->sa_family != AF_INET6)
1554 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1555 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1556 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1557 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1560 if_addr_runlock(ifp);
1562 return ((struct in6_ifaddr *)ifa);
1566 * Convert IP6 address to printable (loggable) representation. Caller
1567 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1569 static char digits[] = "0123456789abcdef";
1571 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1573 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1575 const u_int16_t *a = (const u_int16_t *)addr;
1577 int dcolon = 0, zero = 0;
1581 for (i = 0; i < 8; i++) {
1582 if (*(a + i) == 0) {
1587 else if (maxcnt < cnt) {
1598 for (i = 0; i < 8; i++) {
1609 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1621 d = (const u_char *)a;
1622 /* Try to eliminate leading zeros in printout like in :0001. */
1624 *cp = digits[*d >> 4];
1629 *cp = digits[*d++ & 0xf];
1630 if (zero == 0 || (*cp != '0')) {
1634 *cp = digits[*d >> 4];
1635 if (zero == 0 || (*cp != '0')) {
1639 *cp++ = digits[*d & 0xf];
1648 in6_localaddr(struct in6_addr *in6)
1650 struct rm_priotracker in6_ifa_tracker;
1651 struct in6_ifaddr *ia;
1653 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1656 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1657 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1658 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1659 &ia->ia_prefixmask.sin6_addr)) {
1660 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1664 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1670 * Return 1 if an internet address is for the local host and configured
1671 * on one of its interfaces.
1674 in6_localip(struct in6_addr *in6)
1676 struct rm_priotracker in6_ifa_tracker;
1677 struct in6_ifaddr *ia;
1679 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1680 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1681 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1682 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1686 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1691 * Return 1 if an internet address is configured on an interface.
1694 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1696 struct in6_addr in6;
1698 struct in6_ifaddr *ia6;
1701 if (in6_clearscope(&in6))
1703 in6_setscope(&in6, ifp, NULL);
1706 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1707 if (ifa->ifa_addr->sa_family != AF_INET6)
1709 ia6 = (struct in6_ifaddr *)ifa;
1710 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1711 IF_ADDR_RUNLOCK(ifp);
1715 IF_ADDR_RUNLOCK(ifp);
1721 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1723 struct rm_priotracker in6_ifa_tracker;
1724 struct in6_ifaddr *ia;
1726 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1727 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1728 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1729 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1730 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1731 return (1); /* true */
1736 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1738 return (0); /* false */
1742 * return length of part which dst and src are equal
1746 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1749 u_char *s = (u_char *)src, *d = (u_char *)dst;
1750 u_char *lim = s + 16, r;
1753 if ((r = (*d++ ^ *s++)) != 0) {
1764 /* XXX: to be scope conscious */
1766 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1768 int bytelen, bitlen;
1771 if (0 > len || len > 128) {
1772 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1780 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1783 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1784 p2->s6_addr[bytelen] >> (8 - bitlen))
1791 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1793 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1794 int bytelen, bitlen, i;
1797 if (0 > len || len > 128) {
1798 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1803 bzero(maskp, sizeof(*maskp));
1806 for (i = 0; i < bytelen; i++)
1807 maskp->s6_addr[i] = 0xff;
1809 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1813 * return the best address out of the same scope. if no address was
1814 * found, return the first valid address from designated IF.
1817 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1819 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1821 struct in6_ifaddr *besta = 0;
1822 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1824 dep[0] = dep[1] = NULL;
1827 * We first look for addresses in the same scope.
1828 * If there is one, return it.
1829 * If two or more, return one which matches the dst longest.
1830 * If none, return one of global addresses assigned other ifs.
1833 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1834 if (ifa->ifa_addr->sa_family != AF_INET6)
1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1837 continue; /* XXX: is there any case to allow anycast? */
1838 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1839 continue; /* don't use this interface */
1840 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1842 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1843 if (V_ip6_use_deprecated)
1844 dep[0] = (struct in6_ifaddr *)ifa;
1848 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1850 * call in6_matchlen() as few as possible
1854 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1855 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1858 besta = (struct in6_ifaddr *)ifa;
1861 besta = (struct in6_ifaddr *)ifa;
1865 ifa_ref(&besta->ia_ifa);
1866 IF_ADDR_RUNLOCK(ifp);
1870 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1871 if (ifa->ifa_addr->sa_family != AF_INET6)
1873 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1874 continue; /* XXX: is there any case to allow anycast? */
1875 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1876 continue; /* don't use this interface */
1877 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1880 if (V_ip6_use_deprecated)
1881 dep[1] = (struct in6_ifaddr *)ifa;
1887 IF_ADDR_RUNLOCK(ifp);
1888 return (struct in6_ifaddr *)ifa;
1891 /* use the last-resort values, that are, deprecated addresses */
1893 ifa_ref((struct ifaddr *)dep[0]);
1894 IF_ADDR_RUNLOCK(ifp);
1898 ifa_ref((struct ifaddr *)dep[1]);
1899 IF_ADDR_RUNLOCK(ifp);
1903 IF_ADDR_RUNLOCK(ifp);
1908 * perform DAD when interface becomes IFF_UP.
1911 in6_if_up(struct ifnet *ifp)
1914 struct in6_ifaddr *ia;
1917 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1918 if (ifa->ifa_addr->sa_family != AF_INET6)
1920 ia = (struct in6_ifaddr *)ifa;
1921 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1923 * The TENTATIVE flag was likely set by hand
1924 * beforehand, implicitly indicating the need for DAD.
1925 * We may be able to skip the random delay in this
1926 * case, but we impose delays just in case.
1929 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1932 IF_ADDR_RUNLOCK(ifp);
1935 * special cases, like 6to4, are handled in in6_ifattach
1937 in6_ifattach(ifp, NULL);
1941 in6if_do_dad(struct ifnet *ifp)
1943 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1946 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1947 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1951 * Our DAD routine requires the interface up and running.
1952 * However, some interfaces can be up before the RUNNING
1953 * status. Additionaly, users may try to assign addresses
1954 * before the interface becomes up (or running).
1955 * This function returns EAGAIN in that case.
1956 * The caller should mark "tentative" on the address instead of
1957 * performing DAD immediately.
1959 if (!((ifp->if_flags & IFF_UP) &&
1960 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1967 * Calculate max IPv6 MTU through all the interfaces and store it
1973 unsigned long maxmtu = 0;
1976 IFNET_RLOCK_NOSLEEP();
1977 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1978 /* this function can be called during ifnet initialization */
1979 if (!ifp->if_afdata[AF_INET6])
1981 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1982 IN6_LINKMTU(ifp) > maxmtu)
1983 maxmtu = IN6_LINKMTU(ifp);
1985 IFNET_RUNLOCK_NOSLEEP();
1986 if (maxmtu) /* update only when maxmtu is positive */
1987 V_in6_maxmtu = maxmtu;
1991 * Provide the length of interface identifiers to be used for the link attached
1992 * to the given interface. The length should be defined in "IPv6 over
1993 * xxx-link" document. Note that address architecture might also define
1994 * the length for a particular set of address prefixes, regardless of the
1995 * link type. As clarified in rfc2462bis, those two definitions should be
1996 * consistent, and those really are as of August 2004.
1999 in6_if2idlen(struct ifnet *ifp)
2001 switch (ifp->if_type) {
2002 case IFT_ETHER: /* RFC2464 */
2003 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2004 case IFT_L2VLAN: /* ditto */
2005 case IFT_IEEE80211: /* ditto */
2006 case IFT_INFINIBAND:
2008 case IFT_FDDI: /* RFC2467 */
2010 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2012 case IFT_PPP: /* RFC2472 */
2014 case IFT_ARCNET: /* RFC2497 */
2016 case IFT_FRELAY: /* RFC2590 */
2018 case IFT_IEEE1394: /* RFC3146 */
2021 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2023 return (64); /* XXX: is this really correct? */
2026 * Unknown link type:
2027 * It might be controversial to use the today's common constant
2028 * of 64 for these cases unconditionally. For full compliance,
2029 * we should return an error in this case. On the other hand,
2030 * if we simply miss the standard for the link type or a new
2031 * standard is defined for a new link type, the IFID length
2032 * is very likely to be the common constant. As a compromise,
2033 * we always use the constant, but make an explicit notice
2034 * indicating the "unknown" case.
2036 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2041 #include <sys/sysctl.h>
2043 struct in6_llentry {
2044 struct llentry base;
2047 #define IN6_LLTBL_DEFAULT_HSIZE 32
2048 #define IN6_LLTBL_HASH(k, h) \
2049 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2052 * Do actual deallocation of @lle.
2053 * Called by LLE_FREE_LOCKED when number of references
2057 in6_lltable_destroy_lle(struct llentry *lle)
2061 LLE_LOCK_DESTROY(lle);
2062 free(lle, M_LLTABLE);
2065 static struct llentry *
2066 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2068 struct in6_llentry *lle;
2070 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2071 if (lle == NULL) /* NB: caller generates msg */
2074 lle->base.r_l3addr.addr6 = *addr6;
2075 lle->base.lle_refcnt = 1;
2076 lle->base.lle_free = in6_lltable_destroy_lle;
2077 LLE_LOCK_INIT(&lle->base);
2078 callout_init(&lle->base.lle_timer, 1);
2080 return (&lle->base);
2084 in6_lltable_match_prefix(const struct sockaddr *prefix,
2085 const struct sockaddr *mask, u_int flags, struct llentry *lle)
2087 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2088 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2090 if (IN6_ARE_MASKED_ADDR_EQUAL(&lle->r_l3addr.addr6,
2091 &pfx->sin6_addr, &msk->sin6_addr) &&
2092 ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)))
2099 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2103 LLE_WLOCK_ASSERT(lle);
2104 KASSERT(llt != NULL, ("lltable is NULL"));
2106 /* Unlink entry from table */
2107 if ((lle->la_flags & LLE_LINKED) != 0) {
2110 IF_AFDATA_WLOCK_ASSERT(ifp);
2111 lltable_unlink_entry(llt, lle);
2114 if (callout_stop(&lle->lle_timer))
2121 in6_lltable_rtcheck(struct ifnet *ifp,
2123 const struct sockaddr *l3addr)
2126 char ip6buf[INET6_ADDRSTRLEN];
2128 KASSERT(l3addr->sa_family == AF_INET6,
2129 ("sin_family %d", l3addr->sa_family));
2131 /* Our local addresses are always only installed on the default FIB. */
2132 /* XXX rtalloc1 should take a const param */
2133 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2135 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2138 * Create an ND6 cache for an IPv6 neighbor
2139 * that is not covered by our own prefix.
2141 ifa = ifaof_ifpforaddr(l3addr, ifp);
2148 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2149 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2158 static inline uint32_t
2159 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2162 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2166 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2169 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2173 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2175 struct sockaddr_in6 *sin6;
2177 sin6 = (struct sockaddr_in6 *)sa;
2178 bzero(sin6, sizeof(*sin6));
2179 sin6->sin6_family = AF_INET6;
2180 sin6->sin6_len = sizeof(*sin6);
2181 sin6->sin6_addr = lle->r_l3addr.addr6;
2184 static inline struct llentry *
2185 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2187 struct llentry *lle;
2188 struct llentries *lleh;
2191 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2192 lleh = &llt->lle_head[hashidx];
2193 LIST_FOREACH(lle, lleh, lle_next) {
2194 if (lle->la_flags & LLE_DELETED)
2196 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2204 in6_lltable_delete(struct lltable *llt, u_int flags,
2205 const struct sockaddr *l3addr)
2207 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2208 struct llentry *lle;
2210 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2211 KASSERT(l3addr->sa_family == AF_INET6,
2212 ("sin_family %d", l3addr->sa_family));
2214 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2219 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2221 lle->la_flags |= LLE_DELETED;
2222 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2224 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2226 if ((lle->la_flags & (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2235 static struct llentry *
2236 in6_lltable_alloc(struct lltable *llt, u_int flags,
2237 const struct sockaddr *l3addr)
2239 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2240 struct ifnet *ifp = llt->llt_ifp;
2241 struct llentry *lle;
2243 KASSERT(l3addr->sa_family == AF_INET6,
2244 ("sin_family %d", l3addr->sa_family));
2247 * A route that covers the given address must have
2248 * been installed 1st because we are doing a resolution,
2251 if (!(flags & LLE_IFADDR) &&
2252 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2255 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2257 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2260 lle->la_flags = flags;
2261 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2262 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2263 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2266 if ((lle->la_flags & LLE_STATIC) != 0)
2267 lle->ln_state = ND6_LLINFO_REACHABLE;
2272 static struct llentry *
2273 in6_lltable_lookup(struct lltable *llt, u_int flags,
2274 const struct sockaddr *l3addr)
2276 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2277 struct llentry *lle;
2279 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2280 KASSERT(l3addr->sa_family == AF_INET6,
2281 ("sin_family %d", l3addr->sa_family));
2283 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2288 if (flags & LLE_EXCLUSIVE)
2296 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2297 struct sysctl_req *wr)
2299 struct ifnet *ifp = llt->llt_ifp;
2302 struct rt_msghdr rtm;
2303 struct sockaddr_in6 sin6;
2305 * ndp.c assumes that sdl is word aligned
2310 struct sockaddr_dl sdl;
2312 struct sockaddr_dl *sdl;
2315 bzero(&ndpc, sizeof(ndpc));
2316 /* skip deleted entries */
2317 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2319 /* Skip if jailed and not a valid IP of the prison. */
2320 lltable_fill_sa_entry(lle,
2321 (struct sockaddr *)&ndpc.sin6);
2322 if (prison_if(wr->td->td_ucred,
2323 (struct sockaddr *)&ndpc.sin6) != 0)
2326 * produce a msg made of:
2328 * struct sockaddr_in6 (IPv6)
2329 * struct sockaddr_dl;
2331 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2332 ndpc.rtm.rtm_version = RTM_VERSION;
2333 ndpc.rtm.rtm_type = RTM_GET;
2334 ndpc.rtm.rtm_flags = RTF_UP;
2335 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2336 if (V_deembed_scopeid)
2337 sa6_recoverscope(&ndpc.sin6);
2340 if (lle->la_flags & LLE_PUB)
2341 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2344 sdl->sdl_family = AF_LINK;
2345 sdl->sdl_len = sizeof(*sdl);
2346 sdl->sdl_alen = ifp->if_addrlen;
2347 sdl->sdl_index = ifp->if_index;
2348 sdl->sdl_type = ifp->if_type;
2349 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2350 ndpc.rtm.rtm_rmx.rmx_expire =
2351 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2352 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2353 if (lle->la_flags & LLE_STATIC)
2354 ndpc.rtm.rtm_flags |= RTF_STATIC;
2355 ndpc.rtm.rtm_index = ifp->if_index;
2356 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2361 static struct lltable *
2362 in6_lltattach(struct ifnet *ifp)
2364 struct lltable *llt;
2366 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2367 llt->llt_af = AF_INET6;
2370 llt->llt_lookup = in6_lltable_lookup;
2371 llt->llt_alloc_entry = in6_lltable_alloc;
2372 llt->llt_delete = in6_lltable_delete;
2373 llt->llt_dump_entry = in6_lltable_dump_entry;
2374 llt->llt_hash = in6_lltable_hash;
2375 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2376 llt->llt_free_entry = in6_lltable_free_entry;
2377 llt->llt_match_prefix = in6_lltable_match_prefix;
2384 in6_domifattach(struct ifnet *ifp)
2386 struct in6_ifextra *ext;
2388 /* There are not IPv6-capable interfaces. */
2389 switch (ifp->if_type) {
2395 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2396 bzero(ext, sizeof(*ext));
2398 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2399 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2400 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2401 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2403 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2404 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2406 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2407 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2409 ext->nd_ifinfo = nd6_ifattach(ifp);
2410 ext->scope6_id = scope6_ifattach(ifp);
2411 ext->lltable = in6_lltattach(ifp);
2413 ext->mld_ifinfo = mld_domifattach(ifp);
2419 in6_domifmtu(struct ifnet *ifp)
2422 return (IN6_LINKMTU(ifp));
2426 in6_domifdetach(struct ifnet *ifp, void *aux)
2428 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2430 mld_domifdetach(ifp);
2431 scope6_ifdetach(ext->scope6_id);
2432 nd6_ifdetach(ext->nd_ifinfo);
2433 lltable_free(ext->lltable);
2434 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2435 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2436 free(ext->in6_ifstat, M_IFADDR);
2437 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2438 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2439 free(ext->icmp6_ifstat, M_IFADDR);
2440 free(ext, M_IFADDR);
2444 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2445 * v4 mapped addr or v4 compat addr
2448 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2451 bzero(sin, sizeof(*sin));
2452 sin->sin_len = sizeof(struct sockaddr_in);
2453 sin->sin_family = AF_INET;
2454 sin->sin_port = sin6->sin6_port;
2455 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2458 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2460 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2462 bzero(sin6, sizeof(*sin6));
2463 sin6->sin6_len = sizeof(struct sockaddr_in6);
2464 sin6->sin6_family = AF_INET6;
2465 sin6->sin6_port = sin->sin_port;
2466 sin6->sin6_addr.s6_addr32[0] = 0;
2467 sin6->sin6_addr.s6_addr32[1] = 0;
2468 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2469 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2472 /* Convert sockaddr_in6 into sockaddr_in. */
2474 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2476 struct sockaddr_in *sin_p;
2477 struct sockaddr_in6 sin6;
2480 * Save original sockaddr_in6 addr and convert it
2483 sin6 = *(struct sockaddr_in6 *)nam;
2484 sin_p = (struct sockaddr_in *)nam;
2485 in6_sin6_2_sin(sin_p, &sin6);
2488 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2490 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2492 struct sockaddr_in *sin_p;
2493 struct sockaddr_in6 *sin6_p;
2495 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2496 sin_p = (struct sockaddr_in *)*nam;
2497 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2498 free(*nam, M_SONAME);
2499 *nam = (struct sockaddr *)sin6_p;