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:
286 case SIOCGNBRINFO_IN6:
287 case SIOCGDEFIFACE_IN6:
288 return (nd6_ioctl(cmd, data, ifp));
290 #ifdef COMPAT_FREEBSD32
291 case SIOCGDEFIFACE32_IN6:
293 struct in6_ndifreq ndif;
294 struct in6_ndifreq32 *ndif32;
296 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
300 ndif32 = (struct in6_ndifreq32 *)data;
301 ndif32->ifindex = ndif.ifindex;
308 case SIOCSIFPREFIX_IN6:
309 case SIOCDIFPREFIX_IN6:
310 case SIOCAIFPREFIX_IN6:
311 case SIOCCIFPREFIX_IN6:
312 case SIOCSGIFPREFIX_IN6:
313 case SIOCGIFPREFIX_IN6:
315 "prefix ioctls are now invalidated. "
316 "please use ifconfig.\n");
323 error = priv_check(td, PRIV_NETINET_SCOPE6);
330 return (scope6_ioctl(cmd, data, ifp));
334 * Find address for this interface, if it exists.
336 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
337 * only, and used the first interface address as the target of other
338 * operations (without checking ifra_addr). This was because netinet
339 * code/API assumed at most 1 interface address per interface.
340 * Since IPv6 allows a node to assign multiple addresses
341 * on a single interface, we almost always look and check the
342 * presence of ifra_addr, and reject invalid ones here.
343 * It also decreases duplicated code among SIOC*_IN6 operations.
346 case SIOCAIFADDR_IN6:
347 case SIOCSIFPHYADDR_IN6:
348 sa6 = &ifra->ifra_addr;
350 case SIOCSIFADDR_IN6:
351 case SIOCGIFADDR_IN6:
352 case SIOCSIFDSTADDR_IN6:
353 case SIOCSIFNETMASK_IN6:
354 case SIOCGIFDSTADDR_IN6:
355 case SIOCGIFNETMASK_IN6:
356 case SIOCDIFADDR_IN6:
357 case SIOCGIFPSRCADDR_IN6:
358 case SIOCGIFPDSTADDR_IN6:
359 case SIOCGIFAFLAG_IN6:
360 case SIOCSNDFLUSH_IN6:
361 case SIOCSPFXFLUSH_IN6:
362 case SIOCSRTRFLUSH_IN6:
363 case SIOCGIFALIFETIME_IN6:
364 case SIOCSIFALIFETIME_IN6:
365 case SIOCGIFSTAT_IN6:
366 case SIOCGIFSTAT_ICMP6:
367 sa6 = &ifr->ifr_addr;
374 * Although we should pass any non-INET6 ioctl requests
375 * down to driver, we filter some legacy INET requests.
376 * Drivers trust SIOCSIFADDR et al to come from an already
377 * privileged layer, and do not perform any credentials
378 * checks or input validation.
385 if (sa6 && sa6->sin6_family == AF_INET6) {
386 if (sa6->sin6_scope_id != 0)
387 error = sa6_embedscope(sa6, 0);
389 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
392 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
393 &sa6->sin6_addr)) != 0)
395 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
400 case SIOCSIFADDR_IN6:
401 case SIOCSIFDSTADDR_IN6:
402 case SIOCSIFNETMASK_IN6:
404 * Since IPv6 allows a node to assign multiple addresses
405 * on a single interface, SIOCSIFxxx ioctls are deprecated.
407 /* we decided to obsolete this command (20000704) */
411 case SIOCDIFADDR_IN6:
413 * for IPv4, we look for existing in_ifaddr here to allow
414 * "ifconfig if0 delete" to remove the first IPv4 address on
415 * the interface. For IPv6, as the spec allows multiple
416 * interface address from the day one, we consider "remove the
417 * first one" semantics to be not preferable.
420 error = EADDRNOTAVAIL;
424 case SIOCAIFADDR_IN6:
426 * We always require users to specify a valid IPv6 address for
427 * the corresponding operation.
429 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
430 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
431 error = EAFNOSUPPORT;
436 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
437 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
442 case SIOCGIFSTAT_IN6:
443 case SIOCGIFSTAT_ICMP6:
444 if (ifp->if_afdata[AF_INET6] == NULL) {
445 error = EPFNOSUPPORT;
450 case SIOCGIFADDR_IN6:
451 /* This interface is basically deprecated. use SIOCGIFCONF. */
453 case SIOCGIFAFLAG_IN6:
454 case SIOCGIFNETMASK_IN6:
455 case SIOCGIFDSTADDR_IN6:
456 case SIOCGIFALIFETIME_IN6:
457 /* must think again about its semantics */
459 error = EADDRNOTAVAIL;
464 case SIOCSIFALIFETIME_IN6:
466 struct in6_addrlifetime *lt;
469 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
474 error = EADDRNOTAVAIL;
477 /* sanity for overflow - beware unsigned */
478 lt = &ifr->ifr_ifru.ifru_lifetime;
479 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
480 lt->ia6t_vltime + time_uptime < time_uptime) {
484 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
485 lt->ia6t_pltime + time_uptime < time_uptime) {
494 case SIOCGIFADDR_IN6:
495 ifr->ifr_addr = ia->ia_addr;
496 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
500 case SIOCGIFDSTADDR_IN6:
501 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
506 * XXX: should we check if ifa_dstaddr is NULL and return
509 ifr->ifr_dstaddr = ia->ia_dstaddr;
510 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
514 case SIOCGIFNETMASK_IN6:
515 ifr->ifr_addr = ia->ia_prefixmask;
518 case SIOCGIFAFLAG_IN6:
519 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
522 case SIOCGIFSTAT_IN6:
523 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
524 ifp->if_afdata[AF_INET6])->in6_ifstat,
525 &ifr->ifr_ifru.ifru_stat,
526 sizeof(struct in6_ifstat) / sizeof(uint64_t));
529 case SIOCGIFSTAT_ICMP6:
530 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
531 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
532 &ifr->ifr_ifru.ifru_icmp6stat,
533 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
536 case SIOCGIFALIFETIME_IN6:
537 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
538 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
540 struct in6_addrlifetime *retlt =
541 &ifr->ifr_ifru.ifru_lifetime;
544 * XXX: adjust expiration time assuming time_t is
548 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
549 if (ia->ia6_lifetime.ia6t_vltime <
550 maxexpire - ia->ia6_updatetime) {
551 retlt->ia6t_expire = ia->ia6_updatetime +
552 ia->ia6_lifetime.ia6t_vltime;
554 retlt->ia6t_expire = maxexpire;
556 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
558 struct in6_addrlifetime *retlt =
559 &ifr->ifr_ifru.ifru_lifetime;
562 * XXX: adjust expiration time assuming time_t is
566 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
567 if (ia->ia6_lifetime.ia6t_pltime <
568 maxexpire - ia->ia6_updatetime) {
569 retlt->ia6t_preferred = ia->ia6_updatetime +
570 ia->ia6_lifetime.ia6t_pltime;
572 retlt->ia6t_preferred = maxexpire;
576 case SIOCSIFALIFETIME_IN6:
577 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
579 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
580 ia->ia6_lifetime.ia6t_expire =
581 time_uptime + ia->ia6_lifetime.ia6t_vltime;
583 ia->ia6_lifetime.ia6t_expire = 0;
584 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
585 ia->ia6_lifetime.ia6t_preferred =
586 time_uptime + ia->ia6_lifetime.ia6t_pltime;
588 ia->ia6_lifetime.ia6t_preferred = 0;
591 case SIOCAIFADDR_IN6:
593 struct nd_prefixctl pr0;
594 struct nd_prefix *pr;
597 * first, make or update the interface address structure,
598 * and link it to the list.
600 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
603 ifa_free(&ia->ia_ifa);
604 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
607 * this can happen when the user specify the 0 valid
613 if (cmd == ocmd && ifra->ifra_vhid > 0) {
614 if (carp_attach_p != NULL)
615 error = (*carp_attach_p)(&ia->ia_ifa,
618 error = EPROTONOSUPPORT;
626 * then, make the prefix on-link on the interface.
627 * XXX: we'd rather create the prefix before the address, but
628 * we need at least one address to install the corresponding
629 * interface route, so we configure the address first.
633 * convert mask to prefix length (prefixmask has already
634 * been validated in in6_update_ifa().
636 bzero(&pr0, sizeof(pr0));
638 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
640 if (pr0.ndpr_plen == 128) {
641 /* we don't need to install a host route. */
644 pr0.ndpr_prefix = ifra->ifra_addr;
645 /* apply the mask for safety. */
646 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
647 &ifra->ifra_prefixmask.sin6_addr);
650 * XXX: since we don't have an API to set prefix (not address)
651 * lifetimes, we just use the same lifetimes as addresses.
652 * The (temporarily) installed lifetimes can be overridden by
653 * later advertised RAs (when accept_rtadv is non 0), which is
654 * an intended behavior.
656 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
658 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
659 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
660 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
662 /* add the prefix if not yet. */
663 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
665 * nd6_prelist_add will install the corresponding
668 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
670 (*carp_detach_p)(&ia->ia_ifa);
675 (*carp_detach_p)(&ia->ia_ifa);
676 log(LOG_ERR, "nd6_prelist_add succeeded but "
683 /* relate the address to the prefix */
684 if (ia->ia6_ndpr == NULL) {
689 * If this is the first autoconf address from the
690 * prefix, create a temporary address as well
693 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
694 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
696 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
697 log(LOG_NOTICE, "in6_control: failed "
698 "to create a temporary address, "
705 * this might affect the status of autoconfigured addresses,
706 * that is, this address might make other addresses detached.
708 pfxlist_onlink_check();
710 if (error != 0 || ia == NULL)
713 * Try to clear the flag when a new IPv6 address is added
714 * onto an IFDISABLED interface and it succeeds.
716 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
717 struct in6_ndireq nd;
719 memset(&nd, 0, sizeof(nd));
720 nd.ndi.flags = ND_IFINFO(ifp)->flags;
721 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
722 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
723 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
724 "SIOCSIFINFO_FLAGS for -ifdisabled "
727 * Ignore failure of clearing the flag intentionally.
728 * The failure means address duplication was detected.
731 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
735 case SIOCDIFADDR_IN6:
737 struct nd_prefix *pr;
740 * If the address being deleted is the only one that owns
741 * the corresponding prefix, expire the prefix as well.
742 * XXX: theoretically, we don't have to worry about such
743 * relationship, since we separate the address management
744 * and the prefix management. We do this, however, to provide
745 * as much backward compatibility as possible in terms of
746 * the ioctl operation.
747 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
750 in6_purgeaddr(&ia->ia_ifa);
751 if (pr && pr->ndpr_refcnt == 0)
753 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
758 if (ifp->if_ioctl == NULL) {
762 error = (*ifp->if_ioctl)(ifp, cmd, data);
769 ifa_free(&ia->ia_ifa);
775 * Join necessary multicast groups. Factored out from in6_update_ifa().
776 * This entire work should only be done once, for the default FIB.
779 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
780 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
782 char ip6buf[INET6_ADDRSTRLEN];
783 struct in6_addr mltaddr;
784 struct in6_multi_mship *imm;
787 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
789 /* Join solicited multicast addr for new host id. */
790 bzero(&mltaddr, sizeof(struct in6_addr));
791 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
792 mltaddr.s6_addr32[2] = htonl(1);
793 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
794 mltaddr.s6_addr8[12] = 0xff;
795 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
796 /* XXX: should not happen */
797 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
801 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
803 * We need a random delay for DAD on the address being
804 * configured. It also means delaying transmission of the
805 * corresponding MLD report to avoid report collision.
806 * [RFC 4861, Section 6.3.7]
808 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
810 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
812 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
813 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
814 if_name(ifp), error));
817 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
818 *in6m_sol = imm->i6mm_maddr;
821 * Join link-local all-nodes address.
823 mltaddr = in6addr_linklocal_allnodes;
824 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
825 goto cleanup; /* XXX: should not fail */
827 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
829 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
830 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
831 if_name(ifp), error));
834 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
837 * Join node information group address.
840 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
842 * The spec does not say anything about delay for this group,
843 * but the same logic should apply.
845 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
847 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
849 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
852 "%s: in6_joingroup failed for %s on %s "
853 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
854 &mltaddr), if_name(ifp), error));
855 /* XXX not very fatal, go on... */
857 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
859 if (V_icmp6_nodeinfo_oldmcprefix &&
860 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
861 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
864 "%s: in6_joingroup failed for %s on %s "
865 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
866 &mltaddr), if_name(ifp), error));
867 /* XXX not very fatal, go on... */
869 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
873 * Join interface-local all-nodes address.
874 * (ff01::1%ifN, and ff01::%ifN/32)
876 mltaddr = in6addr_nodelocal_allnodes;
877 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
878 goto cleanup; /* XXX: should not fail */
880 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
882 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
883 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
884 &mltaddr), if_name(ifp), error));
887 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
894 * Update parameters of an IPv6 interface address.
895 * If necessary, a new entry is created and linked into address chains.
896 * This function is separated from in6_control().
899 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
900 struct in6_ifaddr *ia, int flags)
902 int error, hostIsNew = 0;
904 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
909 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
913 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
915 if (hostIsNew != 0) {
916 in6_unlink_ifa(ia, ifp);
917 ifa_free(&ia->ia_ifa);
923 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
929 * Fill in basic IPv6 address request info.
932 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
933 const struct in6_addr *mask)
936 memset(ifra, 0, sizeof(struct in6_aliasreq));
938 ifra->ifra_addr.sin6_family = AF_INET6;
939 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
941 ifra->ifra_addr.sin6_addr = *addr;
943 ifra->ifra_prefixmask.sin6_family = AF_INET6;
944 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
946 ifra->ifra_prefixmask.sin6_addr = *mask;
950 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
951 struct in6_ifaddr *ia, int flags)
954 struct sockaddr_in6 dst6;
955 struct in6_addrlifetime *lt;
956 char ip6buf[INET6_ADDRSTRLEN];
958 /* Validate parameters */
959 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
963 * The destination address for a p2p link must have a family
964 * of AF_UNSPEC or AF_INET6.
966 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
967 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
968 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
969 return (EAFNOSUPPORT);
974 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
975 ifra->ifra_addr.sin6_family != AF_INET6)
979 * validate ifra_prefixmask. don't check sin6_family, netmask
980 * does not carry fields other than sin6_len.
982 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
985 * Because the IPv6 address architecture is classless, we require
986 * users to specify a (non 0) prefix length (mask) for a new address.
987 * We also require the prefix (when specified) mask is valid, and thus
988 * reject a non-consecutive mask.
990 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
992 if (ifra->ifra_prefixmask.sin6_len != 0) {
993 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
994 (u_char *)&ifra->ifra_prefixmask +
995 ifra->ifra_prefixmask.sin6_len);
1000 * In this case, ia must not be NULL. We just use its prefix
1003 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1006 * If the destination address on a p2p interface is specified,
1007 * and the address is a scoped one, validate/set the scope
1010 dst6 = ifra->ifra_dstaddr;
1011 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1012 (dst6.sin6_family == AF_INET6)) {
1013 struct in6_addr in6_tmp;
1016 in6_tmp = dst6.sin6_addr;
1017 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1018 return (EINVAL); /* XXX: should be impossible */
1020 if (dst6.sin6_scope_id != 0) {
1021 if (dst6.sin6_scope_id != zoneid)
1023 } else /* user omit to specify the ID. */
1024 dst6.sin6_scope_id = zoneid;
1026 /* convert into the internal form */
1027 if (sa6_embedscope(&dst6, 0))
1028 return (EINVAL); /* XXX: should be impossible */
1030 /* Modify original ifra_dstaddr to reflect changes */
1031 ifra->ifra_dstaddr = dst6;
1034 * The destination address can be specified only for a p2p or a
1035 * loopback interface. If specified, the corresponding prefix length
1038 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1039 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1040 /* XXX: noisy message */
1041 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1042 "be specified for a p2p or a loopback IF only\n"));
1046 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1047 "be 128 when dstaddr is specified\n"));
1051 /* lifetime consistency check */
1052 lt = &ifra->ifra_lifetime;
1053 if (lt->ia6t_pltime > lt->ia6t_vltime)
1055 if (lt->ia6t_vltime == 0) {
1057 * the following log might be noisy, but this is a typical
1058 * configuration mistake or a tool's bug.
1061 "in6_update_ifa: valid lifetime is 0 for %s\n",
1062 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1065 return (0); /* there's nothing to do */
1068 /* Check prefix mask */
1069 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1071 * We prohibit changing the prefix length of an existing
1073 * + such an operation should be rare in IPv6, and
1074 * + the operation would confuse prefix management.
1076 if (ia->ia_prefixmask.sin6_len != 0 &&
1077 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1078 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1079 "of an existing %s address should not be changed\n",
1080 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1091 * Allocate a new ifaddr and link it into chains.
1093 static struct in6_ifaddr *
1094 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1096 struct in6_ifaddr *ia;
1099 * When in6_alloc_ifa() is called in a process of a received
1100 * RA, it is called under an interrupt context. So, we should
1101 * call malloc with M_NOWAIT.
1103 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1106 LIST_INIT(&ia->ia6_memberships);
1107 /* Initialize the address and masks, and put time stamp */
1108 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1109 ia->ia_addr.sin6_family = AF_INET6;
1110 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1111 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1112 ia->ia_addr = ifra->ifra_addr;
1113 ia->ia6_createtime = time_uptime;
1114 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1116 * Some functions expect that ifa_dstaddr is not
1117 * NULL for p2p interfaces.
1119 ia->ia_ifa.ifa_dstaddr =
1120 (struct sockaddr *)&ia->ia_dstaddr;
1122 ia->ia_ifa.ifa_dstaddr = NULL;
1125 /* set prefix mask if any */
1126 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1127 if (ifra->ifra_prefixmask.sin6_len != 0) {
1128 ia->ia_prefixmask.sin6_family = AF_INET6;
1129 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1130 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1134 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1136 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1137 IF_ADDR_WUNLOCK(ifp);
1139 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1141 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1142 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1143 IN6_IFADDR_WUNLOCK();
1149 * Update/configure interface address parameters:
1151 * 1) Update lifetime
1152 * 2) Update interface metric ad flags
1153 * 3) Notify other subsystems
1156 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1157 struct in6_ifaddr *ia, int hostIsNew, int flags)
1161 /* update timestamp */
1162 ia->ia6_updatetime = time_uptime;
1165 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1166 * to see if the address is deprecated or invalidated, but initialize
1167 * these members for applications.
1169 ia->ia6_lifetime = ifra->ifra_lifetime;
1170 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1171 ia->ia6_lifetime.ia6t_expire =
1172 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1174 ia->ia6_lifetime.ia6t_expire = 0;
1175 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1176 ia->ia6_lifetime.ia6t_preferred =
1177 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1179 ia->ia6_lifetime.ia6t_preferred = 0;
1182 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1183 * userland, make it deprecated.
1185 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1186 ia->ia6_lifetime.ia6t_pltime = 0;
1187 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1191 * configure address flags.
1193 ia->ia6_flags = ifra->ifra_flags;
1196 * Make the address tentative before joining multicast addresses,
1197 * so that corresponding MLD responses would not have a tentative
1200 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1201 if (hostIsNew && in6if_do_dad(ifp))
1202 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1204 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1205 if (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);
1247 * Perform DAD, if needed.
1248 * XXX It may be of use, if we can administratively disable DAD.
1250 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1251 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1253 int delay, mindelay, maxdelay;
1256 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1258 * We need to impose a delay before sending an NS
1259 * for DAD. Check if we also needed a delay for the
1260 * corresponding MLD message. If we did, the delay
1261 * should be larger than the MLD delay (this could be
1262 * relaxed a bit, but this simple logic is at least
1264 * XXX: Break data hiding guidelines and look at
1265 * state for the solicited multicast group.
1268 if (in6m_sol != NULL &&
1269 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1270 mindelay = in6m_sol->in6m_timer;
1272 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1273 if (maxdelay - mindelay == 0)
1277 (arc4random() % (maxdelay - mindelay)) +
1281 nd6_dad_start((struct ifaddr *)ia, delay);
1284 in6_newaddrmsg(ia, RTM_ADD);
1285 ifa_free(&ia->ia_ifa);
1290 in6_purgeaddr(struct ifaddr *ifa)
1292 struct ifnet *ifp = ifa->ifa_ifp;
1293 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1294 struct in6_multi_mship *imm;
1298 (*carp_detach_p)(ifa);
1301 * Remove the loopback route to the interface address.
1302 * The check for the current setting of "nd6_useloopback"
1305 if (ia->ia_flags & IFA_RTSELF) {
1306 error = ifa_del_loopback_route((struct ifaddr *)ia,
1307 (struct sockaddr *)&ia->ia_addr);
1309 ia->ia_flags &= ~IFA_RTSELF;
1312 /* stop DAD processing */
1315 /* Remove local address entry from lltable. */
1316 nd6_rem_ifa_lle(ia);
1318 /* Leave multicast groups. */
1319 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1320 LIST_REMOVE(imm, i6mm_chain);
1321 in6_leavegroup(imm);
1323 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1324 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1325 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1326 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1328 log(LOG_INFO, "%s: err=%d, destination address delete "
1329 "failed\n", __func__, error);
1330 ia->ia_flags &= ~IFA_ROUTE;
1333 in6_newaddrmsg(ia, RTM_DELETE);
1334 in6_unlink_ifa(ia, ifp);
1338 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1340 char ip6buf[INET6_ADDRSTRLEN];
1343 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1344 IF_ADDR_WUNLOCK(ifp);
1345 ifa_free(&ia->ia_ifa); /* if_addrhead */
1348 * Defer the release of what might be the last reference to the
1349 * in6_ifaddr so that it can't be freed before the remainder of the
1353 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1354 LIST_REMOVE(ia, ia6_hash);
1355 IN6_IFADDR_WUNLOCK();
1358 * Release the reference to the base prefix. There should be a
1359 * positive reference.
1361 if (ia->ia6_ndpr == NULL) {
1363 "in6_unlink_ifa: autoconf'ed address "
1364 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1366 ia->ia6_ndpr->ndpr_refcnt--;
1367 ia->ia6_ndpr = NULL;
1371 * Also, if the address being removed is autoconf'ed, call
1372 * pfxlist_onlink_check() since the release might affect the status of
1373 * other (detached) addresses.
1375 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1376 pfxlist_onlink_check();
1378 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1382 * Notifies other other subsystems about address change/arrival:
1383 * 1) Notifies device handler on first IPv6 address assignment
1384 * 2) Handle routing table changes for P2P links and route
1385 * 3) Handle routing table changes for address host route
1388 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1389 struct in6_aliasreq *ifra, int hostIsNew)
1391 int error = 0, plen, ifacount = 0;
1393 struct sockaddr_in6 *pdst;
1394 char ip6buf[INET6_ADDRSTRLEN];
1397 * Give the interface a chance to initialize
1398 * if this is its first address,
1400 if (hostIsNew != 0) {
1402 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1403 if (ifa->ifa_addr->sa_family != AF_INET6)
1407 IF_ADDR_RUNLOCK(ifp);
1410 if (ifacount <= 1 && ifp->if_ioctl) {
1411 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1417 * If a new destination address is specified, scrub the old one and
1418 * install the new destination. Note that the interface must be
1421 pdst = &ifra->ifra_dstaddr;
1422 if (pdst->sin6_family == AF_INET6 &&
1423 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1424 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1425 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1426 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1427 "remove a route to the old destination: %s\n",
1428 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1429 /* proceed anyway... */
1431 ia->ia_flags &= ~IFA_ROUTE;
1432 ia->ia_dstaddr = *pdst;
1436 * If a new destination address is specified for a point-to-point
1437 * interface, install a route to the destination as an interface
1439 * XXX: the logic below rejects assigning multiple addresses on a p2p
1440 * interface that share the same destination.
1442 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1443 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1444 ia->ia_dstaddr.sin6_family == AF_INET6) {
1445 int rtflags = RTF_UP | RTF_HOST;
1447 * Handle the case for ::1 .
1449 if (ifp->if_flags & IFF_LOOPBACK)
1450 ia->ia_flags |= IFA_RTSELF;
1451 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1454 ia->ia_flags |= IFA_ROUTE;
1458 * add a loopback route to self if not exists
1460 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1461 error = ifa_add_loopback_route((struct ifaddr *)ia,
1462 (struct sockaddr *)&ia->ia_addr);
1464 ia->ia_flags |= IFA_RTSELF;
1471 * Find an IPv6 interface link-local address specific to an interface.
1472 * ifaddr is returned referenced.
1475 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1480 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1481 if (ifa->ifa_addr->sa_family != AF_INET6)
1483 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1484 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1491 IF_ADDR_RUNLOCK(ifp);
1493 return ((struct in6_ifaddr *)ifa);
1498 * find the internet address corresponding to a given address.
1499 * ifaddr is returned referenced.
1502 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1504 struct rm_priotracker in6_ifa_tracker;
1505 struct in6_ifaddr *ia;
1507 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1508 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1509 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1511 zoneid != ia->ia_addr.sin6_scope_id)
1513 ifa_ref(&ia->ia_ifa);
1517 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1522 * find the internet address corresponding to a given interface and address.
1523 * ifaddr is returned referenced.
1526 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1531 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1532 if (ifa->ifa_addr->sa_family != AF_INET6)
1534 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1539 IF_ADDR_RUNLOCK(ifp);
1541 return ((struct in6_ifaddr *)ifa);
1545 * Find a link-local scoped address on ifp and return it if any.
1548 in6ifa_llaonifp(struct ifnet *ifp)
1550 struct sockaddr_in6 *sin6;
1553 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1556 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1557 if (ifa->ifa_addr->sa_family != AF_INET6)
1559 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1560 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1561 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1562 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1565 if_addr_runlock(ifp);
1567 return ((struct in6_ifaddr *)ifa);
1571 * Convert IP6 address to printable (loggable) representation. Caller
1572 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1574 static char digits[] = "0123456789abcdef";
1576 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1578 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1580 const u_int16_t *a = (const u_int16_t *)addr;
1582 int dcolon = 0, zero = 0;
1586 for (i = 0; i < 8; i++) {
1587 if (*(a + i) == 0) {
1592 else if (maxcnt < cnt) {
1603 for (i = 0; i < 8; i++) {
1614 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1626 d = (const u_char *)a;
1627 /* Try to eliminate leading zeros in printout like in :0001. */
1629 *cp = digits[*d >> 4];
1634 *cp = digits[*d++ & 0xf];
1635 if (zero == 0 || (*cp != '0')) {
1639 *cp = digits[*d >> 4];
1640 if (zero == 0 || (*cp != '0')) {
1644 *cp++ = digits[*d & 0xf];
1653 in6_localaddr(struct in6_addr *in6)
1655 struct rm_priotracker in6_ifa_tracker;
1656 struct in6_ifaddr *ia;
1658 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1661 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1662 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1663 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1664 &ia->ia_prefixmask.sin6_addr)) {
1665 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1669 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1675 * Return 1 if an internet address is for the local host and configured
1676 * on one of its interfaces.
1679 in6_localip(struct in6_addr *in6)
1681 struct rm_priotracker in6_ifa_tracker;
1682 struct in6_ifaddr *ia;
1684 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1685 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1686 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1687 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1691 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1696 * Return 1 if an internet address is configured on an interface.
1699 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1701 struct in6_addr in6;
1703 struct in6_ifaddr *ia6;
1706 if (in6_clearscope(&in6))
1708 in6_setscope(&in6, ifp, NULL);
1711 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1712 if (ifa->ifa_addr->sa_family != AF_INET6)
1714 ia6 = (struct in6_ifaddr *)ifa;
1715 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1716 IF_ADDR_RUNLOCK(ifp);
1720 IF_ADDR_RUNLOCK(ifp);
1726 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1728 struct rm_priotracker in6_ifa_tracker;
1729 struct in6_ifaddr *ia;
1731 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1732 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1733 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1734 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1735 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1736 return (1); /* true */
1741 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1743 return (0); /* false */
1747 * return length of part which dst and src are equal
1751 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1754 u_char *s = (u_char *)src, *d = (u_char *)dst;
1755 u_char *lim = s + 16, r;
1758 if ((r = (*d++ ^ *s++)) != 0) {
1769 /* XXX: to be scope conscious */
1771 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1773 int bytelen, bitlen;
1776 if (0 > len || len > 128) {
1777 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1785 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1788 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1789 p2->s6_addr[bytelen] >> (8 - bitlen))
1796 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1798 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1799 int bytelen, bitlen, i;
1802 if (0 > len || len > 128) {
1803 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1808 bzero(maskp, sizeof(*maskp));
1811 for (i = 0; i < bytelen; i++)
1812 maskp->s6_addr[i] = 0xff;
1814 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1818 * return the best address out of the same scope. if no address was
1819 * found, return the first valid address from designated IF.
1822 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1824 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1826 struct in6_ifaddr *besta = 0;
1827 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1829 dep[0] = dep[1] = NULL;
1832 * We first look for addresses in the same scope.
1833 * If there is one, return it.
1834 * If two or more, return one which matches the dst longest.
1835 * If none, return one of global addresses assigned other ifs.
1838 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1839 if (ifa->ifa_addr->sa_family != AF_INET6)
1841 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1842 continue; /* XXX: is there any case to allow anycast? */
1843 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1844 continue; /* don't use this interface */
1845 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1847 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1848 if (V_ip6_use_deprecated)
1849 dep[0] = (struct in6_ifaddr *)ifa;
1853 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1855 * call in6_matchlen() as few as possible
1859 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1860 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1863 besta = (struct in6_ifaddr *)ifa;
1866 besta = (struct in6_ifaddr *)ifa;
1870 ifa_ref(&besta->ia_ifa);
1871 IF_ADDR_RUNLOCK(ifp);
1875 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1876 if (ifa->ifa_addr->sa_family != AF_INET6)
1878 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1879 continue; /* XXX: is there any case to allow anycast? */
1880 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1881 continue; /* don't use this interface */
1882 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1884 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1885 if (V_ip6_use_deprecated)
1886 dep[1] = (struct in6_ifaddr *)ifa;
1892 IF_ADDR_RUNLOCK(ifp);
1893 return (struct in6_ifaddr *)ifa;
1896 /* use the last-resort values, that are, deprecated addresses */
1898 ifa_ref((struct ifaddr *)dep[0]);
1899 IF_ADDR_RUNLOCK(ifp);
1903 ifa_ref((struct ifaddr *)dep[1]);
1904 IF_ADDR_RUNLOCK(ifp);
1908 IF_ADDR_RUNLOCK(ifp);
1913 * perform DAD when interface becomes IFF_UP.
1916 in6_if_up(struct ifnet *ifp)
1919 struct in6_ifaddr *ia;
1922 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1923 if (ifa->ifa_addr->sa_family != AF_INET6)
1925 ia = (struct in6_ifaddr *)ifa;
1926 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1928 * The TENTATIVE flag was likely set by hand
1929 * beforehand, implicitly indicating the need for DAD.
1930 * We may be able to skip the random delay in this
1931 * case, but we impose delays just in case.
1934 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1937 IF_ADDR_RUNLOCK(ifp);
1940 * special cases, like 6to4, are handled in in6_ifattach
1942 in6_ifattach(ifp, NULL);
1946 in6if_do_dad(struct ifnet *ifp)
1948 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1951 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1952 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1956 * Our DAD routine requires the interface up and running.
1957 * However, some interfaces can be up before the RUNNING
1958 * status. Additionaly, users may try to assign addresses
1959 * before the interface becomes up (or running).
1960 * We simply skip DAD in such a case as a work around.
1961 * XXX: we should rather mark "tentative" on such addresses,
1962 * and do DAD after the interface becomes ready.
1964 if (!((ifp->if_flags & IFF_UP) &&
1965 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1972 * Calculate max IPv6 MTU through all the interfaces and store it
1978 unsigned long maxmtu = 0;
1981 IFNET_RLOCK_NOSLEEP();
1982 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1983 /* this function can be called during ifnet initialization */
1984 if (!ifp->if_afdata[AF_INET6])
1986 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1987 IN6_LINKMTU(ifp) > maxmtu)
1988 maxmtu = IN6_LINKMTU(ifp);
1990 IFNET_RUNLOCK_NOSLEEP();
1991 if (maxmtu) /* update only when maxmtu is positive */
1992 V_in6_maxmtu = maxmtu;
1996 * Provide the length of interface identifiers to be used for the link attached
1997 * to the given interface. The length should be defined in "IPv6 over
1998 * xxx-link" document. Note that address architecture might also define
1999 * the length for a particular set of address prefixes, regardless of the
2000 * link type. As clarified in rfc2462bis, those two definitions should be
2001 * consistent, and those really are as of August 2004.
2004 in6_if2idlen(struct ifnet *ifp)
2006 switch (ifp->if_type) {
2007 case IFT_ETHER: /* RFC2464 */
2008 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2009 case IFT_L2VLAN: /* ditto */
2010 case IFT_IEEE80211: /* ditto */
2011 case IFT_INFINIBAND:
2013 case IFT_FDDI: /* RFC2467 */
2015 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2017 case IFT_PPP: /* RFC2472 */
2019 case IFT_ARCNET: /* RFC2497 */
2021 case IFT_FRELAY: /* RFC2590 */
2023 case IFT_IEEE1394: /* RFC3146 */
2026 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2028 return (64); /* XXX: is this really correct? */
2031 * Unknown link type:
2032 * It might be controversial to use the today's common constant
2033 * of 64 for these cases unconditionally. For full compliance,
2034 * we should return an error in this case. On the other hand,
2035 * if we simply miss the standard for the link type or a new
2036 * standard is defined for a new link type, the IFID length
2037 * is very likely to be the common constant. As a compromise,
2038 * we always use the constant, but make an explicit notice
2039 * indicating the "unknown" case.
2041 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2046 #include <sys/sysctl.h>
2048 struct in6_llentry {
2049 struct llentry base;
2052 #define IN6_LLTBL_DEFAULT_HSIZE 32
2053 #define IN6_LLTBL_HASH(k, h) \
2054 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2057 * Do actual deallocation of @lle.
2058 * Called by LLE_FREE_LOCKED when number of references
2062 in6_lltable_destroy_lle(struct llentry *lle)
2066 LLE_LOCK_DESTROY(lle);
2067 free(lle, M_LLTABLE);
2070 static struct llentry *
2071 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2073 struct in6_llentry *lle;
2075 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2076 if (lle == NULL) /* NB: caller generates msg */
2079 lle->base.r_l3addr.addr6 = *addr6;
2080 lle->base.lle_refcnt = 1;
2081 lle->base.lle_free = in6_lltable_destroy_lle;
2082 LLE_LOCK_INIT(&lle->base);
2083 callout_init(&lle->base.lle_timer, 1);
2085 return (&lle->base);
2089 in6_lltable_match_prefix(const struct sockaddr *prefix,
2090 const struct sockaddr *mask, u_int flags, struct llentry *lle)
2092 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2093 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2095 if (IN6_ARE_MASKED_ADDR_EQUAL(&lle->r_l3addr.addr6,
2096 &pfx->sin6_addr, &msk->sin6_addr) &&
2097 ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)))
2104 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2108 LLE_WLOCK_ASSERT(lle);
2109 KASSERT(llt != NULL, ("lltable is NULL"));
2111 /* Unlink entry from table */
2112 if ((lle->la_flags & LLE_LINKED) != 0) {
2115 IF_AFDATA_WLOCK_ASSERT(ifp);
2116 lltable_unlink_entry(llt, lle);
2119 if (callout_stop(&lle->lle_timer))
2126 in6_lltable_rtcheck(struct ifnet *ifp,
2128 const struct sockaddr *l3addr)
2131 char ip6buf[INET6_ADDRSTRLEN];
2133 KASSERT(l3addr->sa_family == AF_INET6,
2134 ("sin_family %d", l3addr->sa_family));
2136 /* Our local addresses are always only installed on the default FIB. */
2137 /* XXX rtalloc1 should take a const param */
2138 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2140 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2143 * Create an ND6 cache for an IPv6 neighbor
2144 * that is not covered by our own prefix.
2146 /* XXX ifaof_ifpforaddr should take a const param */
2147 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2154 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2155 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2164 static inline uint32_t
2165 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2168 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2172 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2175 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2179 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2181 struct sockaddr_in6 *sin6;
2183 sin6 = (struct sockaddr_in6 *)sa;
2184 bzero(sin6, sizeof(*sin6));
2185 sin6->sin6_family = AF_INET6;
2186 sin6->sin6_len = sizeof(*sin6);
2187 sin6->sin6_addr = lle->r_l3addr.addr6;
2190 static inline struct llentry *
2191 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2193 struct llentry *lle;
2194 struct llentries *lleh;
2197 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2198 lleh = &llt->lle_head[hashidx];
2199 LIST_FOREACH(lle, lleh, lle_next) {
2200 if (lle->la_flags & LLE_DELETED)
2202 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2210 in6_lltable_delete(struct lltable *llt, u_int flags,
2211 const struct sockaddr *l3addr)
2213 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2214 struct llentry *lle;
2216 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2217 KASSERT(l3addr->sa_family == AF_INET6,
2218 ("sin_family %d", l3addr->sa_family));
2220 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2225 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2227 lle->la_flags |= LLE_DELETED;
2228 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2230 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2232 if ((lle->la_flags & (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2241 static struct llentry *
2242 in6_lltable_alloc(struct lltable *llt, u_int flags,
2243 const struct sockaddr *l3addr)
2245 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2246 struct ifnet *ifp = llt->llt_ifp;
2247 struct llentry *lle;
2249 KASSERT(l3addr->sa_family == AF_INET6,
2250 ("sin_family %d", l3addr->sa_family));
2253 * A route that covers the given address must have
2254 * been installed 1st because we are doing a resolution,
2257 if (!(flags & LLE_IFADDR) &&
2258 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2261 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2263 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2266 lle->la_flags = flags;
2267 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2268 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2269 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2275 static struct llentry *
2276 in6_lltable_lookup(struct lltable *llt, u_int flags,
2277 const struct sockaddr *l3addr)
2279 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2280 struct llentry *lle;
2282 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2283 KASSERT(l3addr->sa_family == AF_INET6,
2284 ("sin_family %d", l3addr->sa_family));
2286 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2291 if (flags & LLE_EXCLUSIVE)
2299 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2300 struct sysctl_req *wr)
2302 struct ifnet *ifp = llt->llt_ifp;
2305 struct rt_msghdr rtm;
2306 struct sockaddr_in6 sin6;
2308 * ndp.c assumes that sdl is word aligned
2313 struct sockaddr_dl sdl;
2315 struct sockaddr_dl *sdl;
2318 bzero(&ndpc, sizeof(ndpc));
2319 /* skip invalid entries */
2320 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2322 /* Skip if jailed and not a valid IP of the prison. */
2323 lltable_fill_sa_entry(lle,
2324 (struct sockaddr *)&ndpc.sin6);
2325 if (prison_if(wr->td->td_ucred,
2326 (struct sockaddr *)&ndpc.sin6) != 0)
2329 * produce a msg made of:
2331 * struct sockaddr_in6 (IPv6)
2332 * struct sockaddr_dl;
2334 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2335 ndpc.rtm.rtm_version = RTM_VERSION;
2336 ndpc.rtm.rtm_type = RTM_GET;
2337 ndpc.rtm.rtm_flags = RTF_UP;
2338 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2339 if (V_deembed_scopeid)
2340 sa6_recoverscope(&ndpc.sin6);
2343 if (lle->la_flags & LLE_PUB)
2344 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2347 sdl->sdl_family = AF_LINK;
2348 sdl->sdl_len = sizeof(*sdl);
2349 sdl->sdl_alen = ifp->if_addrlen;
2350 sdl->sdl_index = ifp->if_index;
2351 sdl->sdl_type = ifp->if_type;
2352 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2353 ndpc.rtm.rtm_rmx.rmx_expire =
2354 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2355 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2356 if (lle->la_flags & LLE_STATIC)
2357 ndpc.rtm.rtm_flags |= RTF_STATIC;
2358 ndpc.rtm.rtm_index = ifp->if_index;
2359 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2364 static struct lltable *
2365 in6_lltattach(struct ifnet *ifp)
2367 struct lltable *llt;
2369 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2370 llt->llt_af = AF_INET6;
2373 llt->llt_lookup = in6_lltable_lookup;
2374 llt->llt_alloc_entry = in6_lltable_alloc;
2375 llt->llt_delete = in6_lltable_delete;
2376 llt->llt_dump_entry = in6_lltable_dump_entry;
2377 llt->llt_hash = in6_lltable_hash;
2378 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2379 llt->llt_free_entry = in6_lltable_free_entry;
2380 llt->llt_match_prefix = in6_lltable_match_prefix;
2387 in6_domifattach(struct ifnet *ifp)
2389 struct in6_ifextra *ext;
2391 /* There are not IPv6-capable interfaces. */
2392 switch (ifp->if_type) {
2398 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2399 bzero(ext, sizeof(*ext));
2401 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2402 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2403 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2404 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2406 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2407 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2409 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2410 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2412 ext->nd_ifinfo = nd6_ifattach(ifp);
2413 ext->scope6_id = scope6_ifattach(ifp);
2414 ext->lltable = in6_lltattach(ifp);
2416 ext->mld_ifinfo = mld_domifattach(ifp);
2422 in6_domifmtu(struct ifnet *ifp)
2425 return (IN6_LINKMTU(ifp));
2429 in6_domifdetach(struct ifnet *ifp, void *aux)
2431 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2433 mld_domifdetach(ifp);
2434 scope6_ifdetach(ext->scope6_id);
2435 nd6_ifdetach(ext->nd_ifinfo);
2436 lltable_free(ext->lltable);
2437 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2438 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2439 free(ext->in6_ifstat, M_IFADDR);
2440 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2441 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2442 free(ext->icmp6_ifstat, M_IFADDR);
2443 free(ext, M_IFADDR);
2447 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2448 * v4 mapped addr or v4 compat addr
2451 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2454 bzero(sin, sizeof(*sin));
2455 sin->sin_len = sizeof(struct sockaddr_in);
2456 sin->sin_family = AF_INET;
2457 sin->sin_port = sin6->sin6_port;
2458 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2461 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2463 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2465 bzero(sin6, sizeof(*sin6));
2466 sin6->sin6_len = sizeof(struct sockaddr_in6);
2467 sin6->sin6_family = AF_INET6;
2468 sin6->sin6_port = sin->sin_port;
2469 sin6->sin6_addr.s6_addr32[0] = 0;
2470 sin6->sin6_addr.s6_addr32[1] = 0;
2471 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2472 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2475 /* Convert sockaddr_in6 into sockaddr_in. */
2477 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2479 struct sockaddr_in *sin_p;
2480 struct sockaddr_in6 sin6;
2483 * Save original sockaddr_in6 addr and convert it
2486 sin6 = *(struct sockaddr_in6 *)nam;
2487 sin_p = (struct sockaddr_in *)nam;
2488 in6_sin6_2_sin(sin_p, &sin6);
2491 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2493 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2495 struct sockaddr_in *sin_p;
2496 struct sockaddr_in6 *sin6_p;
2498 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2499 sin_p = (struct sockaddr_in *)*nam;
2500 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2501 free(*nam, M_SONAME);
2502 *nam = (struct sockaddr *)sin6_p;