2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)in.c 8.2 (Berkeley) 11/15/93
65 #include <sys/cdefs.h>
66 __FBSDID("$FreeBSD$");
68 #include "opt_compat.h"
70 #include "opt_inet6.h"
72 #include <sys/param.h>
73 #include <sys/eventhandler.h>
74 #include <sys/errno.h>
76 #include <sys/malloc.h>
77 #include <sys/socket.h>
78 #include <sys/socketvar.h>
79 #include <sys/sockio.h>
80 #include <sys/systm.h>
84 #include <sys/kernel.h>
86 #include <sys/rmlock.h>
87 #include <sys/syslog.h>
90 #include <net/if_var.h>
91 #include <net/if_types.h>
92 #include <net/route.h>
93 #include <net/if_dl.h>
96 #include <netinet/in.h>
97 #include <netinet/in_var.h>
98 #include <net/if_llatbl.h>
99 #include <netinet/if_ether.h>
100 #include <netinet/in_systm.h>
101 #include <netinet/ip.h>
102 #include <netinet/in_pcb.h>
103 #include <netinet/ip_carp.h>
105 #include <netinet/ip6.h>
106 #include <netinet6/ip6_var.h>
107 #include <netinet6/nd6.h>
108 #include <netinet6/mld6_var.h>
109 #include <netinet6/ip6_mroute.h>
110 #include <netinet6/in6_ifattach.h>
111 #include <netinet6/scope6_var.h>
112 #include <netinet6/in6_fib.h>
113 #include <netinet6/in6_pcb.h>
115 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
116 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
119 * Definitions of some costant IP6 addresses.
121 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
122 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
123 const struct in6_addr in6addr_nodelocal_allnodes =
124 IN6ADDR_NODELOCAL_ALLNODES_INIT;
125 const struct in6_addr in6addr_linklocal_allnodes =
126 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
127 const struct in6_addr in6addr_linklocal_allrouters =
128 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
129 const struct in6_addr in6addr_linklocal_allv2routers =
130 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
132 const struct in6_addr in6mask0 = IN6MASK0;
133 const struct in6_addr in6mask32 = IN6MASK32;
134 const struct in6_addr in6mask64 = IN6MASK64;
135 const struct in6_addr in6mask96 = IN6MASK96;
136 const struct in6_addr in6mask128 = IN6MASK128;
138 const struct sockaddr_in6 sa6_any =
139 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
141 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
142 struct in6_aliasreq *, int);
143 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
145 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
146 struct in6_ifaddr *, int);
147 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
148 struct in6_aliasreq *, int flags);
149 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
150 struct in6_ifaddr *, int, int);
151 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
152 struct in6_ifaddr *, int);
154 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
155 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
159 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
161 struct sockaddr_dl gateway;
162 struct sockaddr_in6 mask, addr;
167 * initialize for rtmsg generation
169 bzero(&gateway, sizeof(gateway));
170 gateway.sdl_len = sizeof(gateway);
171 gateway.sdl_family = AF_LINK;
173 bzero(&rt, sizeof(rt));
174 rt.rt_gateway = (struct sockaddr *)&gateway;
175 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
176 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
177 rt_mask(&rt) = (struct sockaddr *)&mask;
178 rt_key(&rt) = (struct sockaddr *)&addr;
179 rt.rt_flags = RTF_HOST | RTF_STATIC;
181 rt.rt_flags |= RTF_UP;
182 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib;
183 /* Announce arrival of local address to this FIB. */
184 rt_newaddrmsg_fib(cmd, &ia->ia_ifa, 0, &rt, fibnum);
188 in6_mask2len(struct in6_addr *mask, u_char *lim0)
191 u_char *lim = lim0, *p;
193 /* ignore the scope_id part */
194 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
195 lim = (u_char *)mask + sizeof(*mask);
196 for (p = (u_char *)mask; p < lim; x++, p++) {
202 for (y = 0; y < 8; y++) {
203 if ((*p & (0x80 >> y)) == 0)
209 * when the limit pointer is given, do a stricter check on the
213 if (y != 0 && (*p & (0x00ff >> y)) != 0)
215 for (p = p + 1; p < lim; p++)
223 #ifdef COMPAT_FREEBSD32
224 struct in6_ndifreq32 {
225 char ifname[IFNAMSIZ];
228 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
232 in6_control(struct socket *so, u_long cmd, caddr_t data,
233 struct ifnet *ifp, struct thread *td)
235 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
236 struct in6_ifaddr *ia = NULL;
237 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
238 struct sockaddr_in6 *sa6;
239 int carp_attached = 0;
244 * Compat to make pre-10.x ifconfig(8) operable.
246 if (cmd == OSIOCAIFADDR_IN6)
247 cmd = SIOCAIFADDR_IN6;
250 case SIOCGETSGCNT_IN6:
251 case SIOCGETMIFCNT_IN6:
253 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
254 * We cannot see how that would be needed, so do not adjust the
255 * KPI blindly; more likely should clean up the IPv4 variant.
257 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
261 case SIOCAADDRCTL_POLICY:
262 case SIOCDADDRCTL_POLICY:
264 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
268 return (in6_src_ioctl(cmd, data));
275 case SIOCSNDFLUSH_IN6:
276 case SIOCSPFXFLUSH_IN6:
277 case SIOCSRTRFLUSH_IN6:
278 case SIOCSDEFIFACE_IN6:
279 case SIOCSIFINFO_FLAGS:
280 case SIOCSIFINFO_IN6:
282 error = priv_check(td, PRIV_NETINET_ND6);
287 case OSIOCGIFINFO_IN6:
288 case SIOCGIFINFO_IN6:
289 case SIOCGNBRINFO_IN6:
290 case SIOCGDEFIFACE_IN6:
291 return (nd6_ioctl(cmd, data, ifp));
293 #ifdef COMPAT_FREEBSD32
294 case SIOCGDEFIFACE32_IN6:
296 struct in6_ndifreq ndif;
297 struct in6_ndifreq32 *ndif32;
299 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
303 ndif32 = (struct in6_ndifreq32 *)data;
304 ndif32->ifindex = ndif.ifindex;
311 case SIOCSIFPREFIX_IN6:
312 case SIOCDIFPREFIX_IN6:
313 case SIOCAIFPREFIX_IN6:
314 case SIOCCIFPREFIX_IN6:
315 case SIOCSGIFPREFIX_IN6:
316 case SIOCGIFPREFIX_IN6:
318 "prefix ioctls are now invalidated. "
319 "please use ifconfig.\n");
326 error = priv_check(td, PRIV_NETINET_SCOPE6);
333 return (scope6_ioctl(cmd, data, ifp));
337 * Find address for this interface, if it exists.
339 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
340 * only, and used the first interface address as the target of other
341 * operations (without checking ifra_addr). This was because netinet
342 * code/API assumed at most 1 interface address per interface.
343 * Since IPv6 allows a node to assign multiple addresses
344 * on a single interface, we almost always look and check the
345 * presence of ifra_addr, and reject invalid ones here.
346 * It also decreases duplicated code among SIOC*_IN6 operations.
349 case SIOCAIFADDR_IN6:
350 case SIOCSIFPHYADDR_IN6:
351 sa6 = &ifra->ifra_addr;
353 case SIOCSIFADDR_IN6:
354 case SIOCGIFADDR_IN6:
355 case SIOCSIFDSTADDR_IN6:
356 case SIOCSIFNETMASK_IN6:
357 case SIOCGIFDSTADDR_IN6:
358 case SIOCGIFNETMASK_IN6:
359 case SIOCDIFADDR_IN6:
360 case SIOCGIFPSRCADDR_IN6:
361 case SIOCGIFPDSTADDR_IN6:
362 case SIOCGIFAFLAG_IN6:
363 case SIOCSNDFLUSH_IN6:
364 case SIOCSPFXFLUSH_IN6:
365 case SIOCSRTRFLUSH_IN6:
366 case SIOCGIFALIFETIME_IN6:
367 case SIOCGIFSTAT_IN6:
368 case SIOCGIFSTAT_ICMP6:
369 sa6 = &ifr->ifr_addr;
376 * Although we should pass any non-INET6 ioctl requests
377 * down to driver, we filter some legacy INET requests.
378 * Drivers trust SIOCSIFADDR et al to come from an already
379 * privileged layer, and do not perform any credentials
380 * checks or input validation.
387 if (sa6 && sa6->sin6_family == AF_INET6) {
388 if (sa6->sin6_scope_id != 0)
389 error = sa6_embedscope(sa6, 0);
391 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
394 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
395 &sa6->sin6_addr)) != 0)
397 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
402 case SIOCSIFADDR_IN6:
403 case SIOCSIFDSTADDR_IN6:
404 case SIOCSIFNETMASK_IN6:
406 * Since IPv6 allows a node to assign multiple addresses
407 * on a single interface, SIOCSIFxxx ioctls are deprecated.
409 /* we decided to obsolete this command (20000704) */
413 case SIOCDIFADDR_IN6:
415 * for IPv4, we look for existing in_ifaddr here to allow
416 * "ifconfig if0 delete" to remove the first IPv4 address on
417 * the interface. For IPv6, as the spec allows multiple
418 * interface address from the day one, we consider "remove the
419 * first one" semantics to be not preferable.
422 error = EADDRNOTAVAIL;
426 case SIOCAIFADDR_IN6:
428 * We always require users to specify a valid IPv6 address for
429 * the corresponding operation.
431 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
432 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
433 error = EAFNOSUPPORT;
438 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
439 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
444 case SIOCGIFSTAT_IN6:
445 case SIOCGIFSTAT_ICMP6:
446 if (ifp->if_afdata[AF_INET6] == NULL) {
447 error = EPFNOSUPPORT;
452 case SIOCGIFADDR_IN6:
453 /* This interface is basically deprecated. use SIOCGIFCONF. */
455 case SIOCGIFAFLAG_IN6:
456 case SIOCGIFNETMASK_IN6:
457 case SIOCGIFDSTADDR_IN6:
458 case SIOCGIFALIFETIME_IN6:
459 /* must think again about its semantics */
461 error = EADDRNOTAVAIL;
468 case SIOCGIFADDR_IN6:
469 ifr->ifr_addr = ia->ia_addr;
470 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
474 case SIOCGIFDSTADDR_IN6:
475 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
480 * XXX: should we check if ifa_dstaddr is NULL and return
483 ifr->ifr_dstaddr = ia->ia_dstaddr;
484 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
488 case SIOCGIFNETMASK_IN6:
489 ifr->ifr_addr = ia->ia_prefixmask;
492 case SIOCGIFAFLAG_IN6:
493 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
496 case SIOCGIFSTAT_IN6:
497 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
498 ifp->if_afdata[AF_INET6])->in6_ifstat,
499 &ifr->ifr_ifru.ifru_stat,
500 sizeof(struct in6_ifstat) / sizeof(uint64_t));
503 case SIOCGIFSTAT_ICMP6:
504 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
505 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
506 &ifr->ifr_ifru.ifru_icmp6stat,
507 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
510 case SIOCGIFALIFETIME_IN6:
511 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
512 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
514 struct in6_addrlifetime *retlt =
515 &ifr->ifr_ifru.ifru_lifetime;
518 * XXX: adjust expiration time assuming time_t is
522 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
523 if (ia->ia6_lifetime.ia6t_vltime <
524 maxexpire - ia->ia6_updatetime) {
525 retlt->ia6t_expire = ia->ia6_updatetime +
526 ia->ia6_lifetime.ia6t_vltime;
528 retlt->ia6t_expire = maxexpire;
530 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
532 struct in6_addrlifetime *retlt =
533 &ifr->ifr_ifru.ifru_lifetime;
536 * XXX: adjust expiration time assuming time_t is
540 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
541 if (ia->ia6_lifetime.ia6t_pltime <
542 maxexpire - ia->ia6_updatetime) {
543 retlt->ia6t_preferred = ia->ia6_updatetime +
544 ia->ia6_lifetime.ia6t_pltime;
546 retlt->ia6t_preferred = maxexpire;
550 case SIOCAIFADDR_IN6:
552 struct nd_prefixctl pr0;
553 struct nd_prefix *pr;
556 * first, make or update the interface address structure,
557 * and link it to the list.
559 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
562 if (ia->ia_ifa.ifa_carp)
563 (*carp_detach_p)(&ia->ia_ifa, true);
564 ifa_free(&ia->ia_ifa);
566 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
569 * this can happen when the user specify the 0 valid
575 if (cmd == ocmd && ifra->ifra_vhid > 0) {
576 if (carp_attach_p != NULL)
577 error = (*carp_attach_p)(&ia->ia_ifa,
580 error = EPROTONOSUPPORT;
588 * then, make the prefix on-link on the interface.
589 * XXX: we'd rather create the prefix before the address, but
590 * we need at least one address to install the corresponding
591 * interface route, so we configure the address first.
595 * convert mask to prefix length (prefixmask has already
596 * been validated in in6_update_ifa().
598 bzero(&pr0, sizeof(pr0));
600 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
602 if (pr0.ndpr_plen == 128) {
603 /* we don't need to install a host route. */
606 pr0.ndpr_prefix = ifra->ifra_addr;
607 /* apply the mask for safety. */
608 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
609 &ifra->ifra_prefixmask.sin6_addr);
612 * XXX: since we don't have an API to set prefix (not address)
613 * lifetimes, we just use the same lifetimes as addresses.
614 * The (temporarily) installed lifetimes can be overridden by
615 * later advertised RAs (when accept_rtadv is non 0), which is
616 * an intended behavior.
618 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
620 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
621 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
622 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
624 /* add the prefix if not yet. */
625 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
627 * nd6_prelist_add will install the corresponding
630 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
632 (*carp_detach_p)(&ia->ia_ifa, false);
637 /* relate the address to the prefix */
638 if (ia->ia6_ndpr == NULL) {
643 * If this is the first autoconf address from the
644 * prefix, create a temporary address as well
647 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
648 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
650 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
651 log(LOG_NOTICE, "in6_control: failed "
652 "to create a temporary address, "
660 * this might affect the status of autoconfigured addresses,
661 * that is, this address might make other addresses detached.
663 pfxlist_onlink_check();
667 * Try to clear the flag when a new IPv6 address is added
668 * onto an IFDISABLED interface and it succeeds.
670 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
671 struct in6_ndireq nd;
673 memset(&nd, 0, sizeof(nd));
674 nd.ndi.flags = ND_IFINFO(ifp)->flags;
675 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
676 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
677 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
678 "SIOCSIFINFO_FLAGS for -ifdisabled "
681 * Ignore failure of clearing the flag intentionally.
682 * The failure means address duplication was detected.
685 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
689 case SIOCDIFADDR_IN6:
691 struct nd_prefix *pr;
694 * If the address being deleted is the only one that owns
695 * the corresponding prefix, expire the prefix as well.
696 * XXX: theoretically, we don't have to worry about such
697 * relationship, since we separate the address management
698 * and the prefix management. We do this, however, to provide
699 * as much backward compatibility as possible in terms of
700 * the ioctl operation.
701 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
704 in6_purgeaddr(&ia->ia_ifa);
705 if (pr != NULL && pr->ndpr_addrcnt == 0) {
707 nd6_prefix_unlink(pr, NULL);
711 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
716 if (ifp->if_ioctl == NULL) {
720 error = (*ifp->if_ioctl)(ifp, cmd, data);
727 ifa_free(&ia->ia_ifa);
733 * Join necessary multicast groups. Factored out from in6_update_ifa().
734 * This entire work should only be done once, for the default FIB.
737 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
738 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
740 char ip6buf[INET6_ADDRSTRLEN];
741 struct in6_addr mltaddr;
742 struct in6_multi_mship *imm;
745 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
747 /* Join solicited multicast addr for new host id. */
748 bzero(&mltaddr, sizeof(struct in6_addr));
749 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
750 mltaddr.s6_addr32[2] = htonl(1);
751 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
752 mltaddr.s6_addr8[12] = 0xff;
753 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
754 /* XXX: should not happen */
755 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
759 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
761 * We need a random delay for DAD on the address being
762 * configured. It also means delaying transmission of the
763 * corresponding MLD report to avoid report collision.
764 * [RFC 4861, Section 6.3.7]
766 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
768 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
770 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
771 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
772 if_name(ifp), error));
775 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
776 *in6m_sol = imm->i6mm_maddr;
779 * Join link-local all-nodes address.
781 mltaddr = in6addr_linklocal_allnodes;
782 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
783 goto cleanup; /* XXX: should not fail */
785 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
787 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
788 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
789 if_name(ifp), error));
792 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
795 * Join node information group address.
798 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
800 * The spec does not say anything about delay for this group,
801 * but the same logic should apply.
803 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
805 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
807 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
810 "%s: in6_joingroup failed for %s on %s "
811 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
812 &mltaddr), if_name(ifp), error));
813 /* XXX not very fatal, go on... */
815 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
817 if (V_icmp6_nodeinfo_oldmcprefix &&
818 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
819 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
822 "%s: in6_joingroup failed for %s on %s "
823 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
824 &mltaddr), if_name(ifp), error));
825 /* XXX not very fatal, go on... */
827 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
831 * Join interface-local all-nodes address.
832 * (ff01::1%ifN, and ff01::%ifN/32)
834 mltaddr = in6addr_nodelocal_allnodes;
835 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
836 goto cleanup; /* XXX: should not fail */
838 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
840 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
841 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
842 &mltaddr), if_name(ifp), error));
845 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
852 * Update parameters of an IPv6 interface address.
853 * If necessary, a new entry is created and linked into address chains.
854 * This function is separated from in6_control().
857 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
858 struct in6_ifaddr *ia, int flags)
860 int error, hostIsNew = 0;
862 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
867 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
871 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
873 if (hostIsNew != 0) {
874 in6_unlink_ifa(ia, ifp);
875 ifa_free(&ia->ia_ifa);
881 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
887 * Fill in basic IPv6 address request info.
890 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
891 const struct in6_addr *mask)
894 memset(ifra, 0, sizeof(struct in6_aliasreq));
896 ifra->ifra_addr.sin6_family = AF_INET6;
897 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
899 ifra->ifra_addr.sin6_addr = *addr;
901 ifra->ifra_prefixmask.sin6_family = AF_INET6;
902 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
904 ifra->ifra_prefixmask.sin6_addr = *mask;
908 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
909 struct in6_ifaddr *ia, int flags)
912 struct sockaddr_in6 dst6;
913 struct in6_addrlifetime *lt;
914 char ip6buf[INET6_ADDRSTRLEN];
916 /* Validate parameters */
917 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
921 * The destination address for a p2p link must have a family
922 * of AF_UNSPEC or AF_INET6.
924 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
925 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
926 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
927 return (EAFNOSUPPORT);
932 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
933 ifra->ifra_addr.sin6_family != AF_INET6)
937 * validate ifra_prefixmask. don't check sin6_family, netmask
938 * does not carry fields other than sin6_len.
940 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
943 * Because the IPv6 address architecture is classless, we require
944 * users to specify a (non 0) prefix length (mask) for a new address.
945 * We also require the prefix (when specified) mask is valid, and thus
946 * reject a non-consecutive mask.
948 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
950 if (ifra->ifra_prefixmask.sin6_len != 0) {
951 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
952 (u_char *)&ifra->ifra_prefixmask +
953 ifra->ifra_prefixmask.sin6_len);
958 * In this case, ia must not be NULL. We just use its prefix
961 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
964 * If the destination address on a p2p interface is specified,
965 * and the address is a scoped one, validate/set the scope
968 dst6 = ifra->ifra_dstaddr;
969 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
970 (dst6.sin6_family == AF_INET6)) {
971 struct in6_addr in6_tmp;
974 in6_tmp = dst6.sin6_addr;
975 if (in6_setscope(&in6_tmp, ifp, &zoneid))
976 return (EINVAL); /* XXX: should be impossible */
978 if (dst6.sin6_scope_id != 0) {
979 if (dst6.sin6_scope_id != zoneid)
981 } else /* user omit to specify the ID. */
982 dst6.sin6_scope_id = zoneid;
984 /* convert into the internal form */
985 if (sa6_embedscope(&dst6, 0))
986 return (EINVAL); /* XXX: should be impossible */
988 /* Modify original ifra_dstaddr to reflect changes */
989 ifra->ifra_dstaddr = dst6;
992 * The destination address can be specified only for a p2p or a
993 * loopback interface. If specified, the corresponding prefix length
996 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
997 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
998 /* XXX: noisy message */
999 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1000 "be specified for a p2p or a loopback IF only\n"));
1004 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1005 "be 128 when dstaddr is specified\n"));
1009 /* lifetime consistency check */
1010 lt = &ifra->ifra_lifetime;
1011 if (lt->ia6t_pltime > lt->ia6t_vltime)
1013 if (lt->ia6t_vltime == 0) {
1015 * the following log might be noisy, but this is a typical
1016 * configuration mistake or a tool's bug.
1019 "in6_update_ifa: valid lifetime is 0 for %s\n",
1020 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1023 return (0); /* there's nothing to do */
1026 /* Check prefix mask */
1027 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1029 * We prohibit changing the prefix length of an existing
1031 * + such an operation should be rare in IPv6, and
1032 * + the operation would confuse prefix management.
1034 if (ia->ia_prefixmask.sin6_len != 0 &&
1035 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1036 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1037 "of an existing %s address should not be changed\n",
1038 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1049 * Allocate a new ifaddr and link it into chains.
1051 static struct in6_ifaddr *
1052 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1054 struct in6_ifaddr *ia;
1057 * When in6_alloc_ifa() is called in a process of a received
1058 * RA, it is called under an interrupt context. So, we should
1059 * call malloc with M_NOWAIT.
1061 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1064 LIST_INIT(&ia->ia6_memberships);
1065 /* Initialize the address and masks, and put time stamp */
1066 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1067 ia->ia_addr.sin6_family = AF_INET6;
1068 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1069 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1070 ia->ia_addr = ifra->ifra_addr;
1071 ia->ia6_createtime = time_uptime;
1072 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1074 * Some functions expect that ifa_dstaddr is not
1075 * NULL for p2p interfaces.
1077 ia->ia_ifa.ifa_dstaddr =
1078 (struct sockaddr *)&ia->ia_dstaddr;
1080 ia->ia_ifa.ifa_dstaddr = NULL;
1083 /* set prefix mask if any */
1084 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1085 if (ifra->ifra_prefixmask.sin6_len != 0) {
1086 ia->ia_prefixmask.sin6_family = AF_INET6;
1087 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1088 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1092 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1094 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1095 IF_ADDR_WUNLOCK(ifp);
1097 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1099 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1100 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1101 IN6_IFADDR_WUNLOCK();
1107 * Update/configure interface address parameters:
1109 * 1) Update lifetime
1110 * 2) Update interface metric ad flags
1111 * 3) Notify other subsystems
1114 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1115 struct in6_ifaddr *ia, int hostIsNew, int flags)
1119 /* update timestamp */
1120 ia->ia6_updatetime = time_uptime;
1123 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1124 * to see if the address is deprecated or invalidated, but initialize
1125 * these members for applications.
1127 ia->ia6_lifetime = ifra->ifra_lifetime;
1128 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1129 ia->ia6_lifetime.ia6t_expire =
1130 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1132 ia->ia6_lifetime.ia6t_expire = 0;
1133 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1134 ia->ia6_lifetime.ia6t_preferred =
1135 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1137 ia->ia6_lifetime.ia6t_preferred = 0;
1140 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1141 * userland, make it deprecated.
1143 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1144 ia->ia6_lifetime.ia6t_pltime = 0;
1145 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1149 * configure address flags.
1151 ia->ia6_flags = ifra->ifra_flags;
1154 * Make the address tentative before joining multicast addresses,
1155 * so that corresponding MLD responses would not have a tentative
1158 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1161 * DAD should be performed for an new address or addresses on
1162 * an interface with ND6_IFF_IFDISABLED.
1164 if (in6if_do_dad(ifp) &&
1165 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1166 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1168 /* notify other subsystems */
1169 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1175 * Do link-level ifa job:
1176 * 1) Add lle entry for added address
1177 * 2) Notifies routing socket users about new address
1178 * 3) join appropriate multicast group
1179 * 4) start DAD if enabled
1182 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1183 struct in6_ifaddr *ia, int flags)
1185 struct in6_multi *in6m_sol;
1188 /* Add local address to lltable, if necessary (ex. on p2p link). */
1189 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1190 in6_purgeaddr(&ia->ia_ifa);
1191 ifa_free(&ia->ia_ifa);
1195 /* Join necessary multicast groups. */
1197 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1198 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1200 in6_purgeaddr(&ia->ia_ifa);
1201 ifa_free(&ia->ia_ifa);
1206 /* Perform DAD, if the address is TENTATIVE. */
1207 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1208 int delay, mindelay, maxdelay;
1211 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1213 * We need to impose a delay before sending an NS
1214 * for DAD. Check if we also needed a delay for the
1215 * corresponding MLD message. If we did, the delay
1216 * should be larger than the MLD delay (this could be
1217 * relaxed a bit, but this simple logic is at least
1219 * XXX: Break data hiding guidelines and look at
1220 * state for the solicited multicast group.
1223 if (in6m_sol != NULL &&
1224 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1225 mindelay = in6m_sol->in6m_timer;
1227 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1228 if (maxdelay - mindelay == 0)
1232 (arc4random() % (maxdelay - mindelay)) +
1236 nd6_dad_start((struct ifaddr *)ia, delay);
1239 in6_newaddrmsg(ia, RTM_ADD);
1240 ifa_free(&ia->ia_ifa);
1245 in6_purgeaddr(struct ifaddr *ifa)
1247 struct ifnet *ifp = ifa->ifa_ifp;
1248 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1249 struct in6_multi_mship *imm;
1253 (*carp_detach_p)(ifa, false);
1256 * Remove the loopback route to the interface address.
1257 * The check for the current setting of "nd6_useloopback"
1260 if (ia->ia_flags & IFA_RTSELF) {
1261 error = ifa_del_loopback_route((struct ifaddr *)ia,
1262 (struct sockaddr *)&ia->ia_addr);
1264 ia->ia_flags &= ~IFA_RTSELF;
1267 /* stop DAD processing */
1270 /* Leave multicast groups. */
1271 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1272 LIST_REMOVE(imm, i6mm_chain);
1273 in6_leavegroup(imm);
1275 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1276 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1277 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1278 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1280 log(LOG_INFO, "%s: err=%d, destination address delete "
1281 "failed\n", __func__, error);
1282 ia->ia_flags &= ~IFA_ROUTE;
1285 in6_newaddrmsg(ia, RTM_DELETE);
1286 in6_unlink_ifa(ia, ifp);
1290 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1292 char ip6buf[INET6_ADDRSTRLEN];
1296 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1297 IF_ADDR_WUNLOCK(ifp);
1298 ifa_free(&ia->ia_ifa); /* if_addrhead */
1301 * Defer the release of what might be the last reference to the
1302 * in6_ifaddr so that it can't be freed before the remainder of the
1306 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1307 LIST_REMOVE(ia, ia6_hash);
1308 IN6_IFADDR_WUNLOCK();
1311 * Release the reference to the base prefix. There should be a
1312 * positive reference.
1315 if (ia->ia6_ndpr == NULL) {
1317 "in6_unlink_ifa: autoconf'ed address "
1318 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1320 ia->ia6_ndpr->ndpr_addrcnt--;
1321 /* Do not delete lles within prefix if refcont != 0 */
1322 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1324 ia->ia6_ndpr = NULL;
1327 nd6_rem_ifa_lle(ia, remove_lle);
1330 * Also, if the address being removed is autoconf'ed, call
1331 * pfxlist_onlink_check() since the release might affect the status of
1332 * other (detached) addresses.
1334 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1335 pfxlist_onlink_check();
1337 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1341 * Notifies other subsystems about address change/arrival:
1342 * 1) Notifies device handler on the first IPv6 address assignment
1343 * 2) Handle routing table changes for P2P links and route
1344 * 3) Handle routing table changes for address host route
1347 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1348 struct in6_aliasreq *ifra, int hostIsNew)
1350 int error = 0, plen, ifacount = 0;
1352 struct sockaddr_in6 *pdst;
1353 char ip6buf[INET6_ADDRSTRLEN];
1356 * Give the interface a chance to initialize
1357 * if this is its first address,
1359 if (hostIsNew != 0) {
1361 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1362 if (ifa->ifa_addr->sa_family != AF_INET6)
1366 IF_ADDR_RUNLOCK(ifp);
1369 if (ifacount <= 1 && ifp->if_ioctl) {
1370 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1376 * If a new destination address is specified, scrub the old one and
1377 * install the new destination. Note that the interface must be
1380 pdst = &ifra->ifra_dstaddr;
1381 if (pdst->sin6_family == AF_INET6 &&
1382 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1383 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1384 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1385 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1386 "remove a route to the old destination: %s\n",
1387 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1388 /* proceed anyway... */
1390 ia->ia_flags &= ~IFA_ROUTE;
1391 ia->ia_dstaddr = *pdst;
1395 * If a new destination address is specified for a point-to-point
1396 * interface, install a route to the destination as an interface
1398 * XXX: the logic below rejects assigning multiple addresses on a p2p
1399 * interface that share the same destination.
1401 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1402 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1403 ia->ia_dstaddr.sin6_family == AF_INET6) {
1404 int rtflags = RTF_UP | RTF_HOST;
1406 * Handle the case for ::1 .
1408 if (ifp->if_flags & IFF_LOOPBACK)
1409 ia->ia_flags |= IFA_RTSELF;
1410 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1413 ia->ia_flags |= IFA_ROUTE;
1417 * add a loopback route to self if not exists
1419 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1420 error = ifa_add_loopback_route((struct ifaddr *)ia,
1421 (struct sockaddr *)&ia->ia_addr);
1423 ia->ia_flags |= IFA_RTSELF;
1430 * Find an IPv6 interface link-local address specific to an interface.
1431 * ifaddr is returned referenced.
1434 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1439 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1440 if (ifa->ifa_addr->sa_family != AF_INET6)
1442 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1443 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1450 IF_ADDR_RUNLOCK(ifp);
1452 return ((struct in6_ifaddr *)ifa);
1457 * find the interface address corresponding to a given IPv6 address.
1458 * ifaddr is returned referenced.
1461 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1463 struct rm_priotracker in6_ifa_tracker;
1464 struct in6_ifaddr *ia;
1466 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1467 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1468 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1470 zoneid != ia->ia_addr.sin6_scope_id)
1472 ifa_ref(&ia->ia_ifa);
1476 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1481 * find the internet address corresponding to a given interface and address.
1482 * ifaddr is returned referenced.
1485 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1490 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1491 if (ifa->ifa_addr->sa_family != AF_INET6)
1493 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1498 IF_ADDR_RUNLOCK(ifp);
1500 return ((struct in6_ifaddr *)ifa);
1504 * Find a link-local scoped address on ifp and return it if any.
1507 in6ifa_llaonifp(struct ifnet *ifp)
1509 struct sockaddr_in6 *sin6;
1512 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1515 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1516 if (ifa->ifa_addr->sa_family != AF_INET6)
1518 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1519 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1520 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1521 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1524 IF_ADDR_RUNLOCK(ifp);
1526 return ((struct in6_ifaddr *)ifa);
1530 * Convert IP6 address to printable (loggable) representation. Caller
1531 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1533 static char digits[] = "0123456789abcdef";
1535 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1537 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1539 const u_int16_t *a = (const u_int16_t *)addr;
1541 int dcolon = 0, zero = 0;
1545 for (i = 0; i < 8; i++) {
1546 if (*(a + i) == 0) {
1551 else if (maxcnt < cnt) {
1562 for (i = 0; i < 8; i++) {
1573 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1585 d = (const u_char *)a;
1586 /* Try to eliminate leading zeros in printout like in :0001. */
1588 *cp = digits[*d >> 4];
1593 *cp = digits[*d++ & 0xf];
1594 if (zero == 0 || (*cp != '0')) {
1598 *cp = digits[*d >> 4];
1599 if (zero == 0 || (*cp != '0')) {
1603 *cp++ = digits[*d & 0xf];
1612 in6_localaddr(struct in6_addr *in6)
1614 struct rm_priotracker in6_ifa_tracker;
1615 struct in6_ifaddr *ia;
1617 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1620 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1621 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1622 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1623 &ia->ia_prefixmask.sin6_addr)) {
1624 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1628 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1634 * Return 1 if an internet address is for the local host and configured
1635 * on one of its interfaces.
1638 in6_localip(struct in6_addr *in6)
1640 struct rm_priotracker in6_ifa_tracker;
1641 struct in6_ifaddr *ia;
1643 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1644 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1645 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1646 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1650 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1655 * Return 1 if an internet address is configured on an interface.
1658 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1660 struct in6_addr in6;
1662 struct in6_ifaddr *ia6;
1665 if (in6_clearscope(&in6))
1667 in6_setscope(&in6, ifp, NULL);
1670 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1671 if (ifa->ifa_addr->sa_family != AF_INET6)
1673 ia6 = (struct in6_ifaddr *)ifa;
1674 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1675 IF_ADDR_RUNLOCK(ifp);
1679 IF_ADDR_RUNLOCK(ifp);
1685 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1687 struct rm_priotracker in6_ifa_tracker;
1688 struct in6_ifaddr *ia;
1690 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1691 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1692 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1693 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1694 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1695 return (1); /* true */
1700 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1702 return (0); /* false */
1706 * return length of part which dst and src are equal
1710 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1713 u_char *s = (u_char *)src, *d = (u_char *)dst;
1714 u_char *lim = s + 16, r;
1717 if ((r = (*d++ ^ *s++)) != 0) {
1728 /* XXX: to be scope conscious */
1730 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1732 int bytelen, bitlen;
1735 if (0 > len || len > 128) {
1736 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1744 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1747 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1748 p2->s6_addr[bytelen] >> (8 - bitlen))
1755 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1757 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1758 int bytelen, bitlen, i;
1761 if (0 > len || len > 128) {
1762 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1767 bzero(maskp, sizeof(*maskp));
1770 for (i = 0; i < bytelen; i++)
1771 maskp->s6_addr[i] = 0xff;
1773 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1777 * return the best address out of the same scope. if no address was
1778 * found, return the first valid address from designated IF.
1781 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1783 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1785 struct in6_ifaddr *besta = NULL;
1786 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1788 dep[0] = dep[1] = NULL;
1791 * We first look for addresses in the same scope.
1792 * If there is one, return it.
1793 * If two or more, return one which matches the dst longest.
1794 * If none, return one of global addresses assigned other ifs.
1797 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1798 if (ifa->ifa_addr->sa_family != AF_INET6)
1800 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1801 continue; /* XXX: is there any case to allow anycast? */
1802 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1803 continue; /* don't use this interface */
1804 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1806 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1807 if (V_ip6_use_deprecated)
1808 dep[0] = (struct in6_ifaddr *)ifa;
1812 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1814 * call in6_matchlen() as few as possible
1818 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1819 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1822 besta = (struct in6_ifaddr *)ifa;
1825 besta = (struct in6_ifaddr *)ifa;
1829 ifa_ref(&besta->ia_ifa);
1830 IF_ADDR_RUNLOCK(ifp);
1834 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1835 if (ifa->ifa_addr->sa_family != AF_INET6)
1837 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1838 continue; /* XXX: is there any case to allow anycast? */
1839 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1840 continue; /* don't use this interface */
1841 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1843 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1844 if (V_ip6_use_deprecated)
1845 dep[1] = (struct in6_ifaddr *)ifa;
1851 IF_ADDR_RUNLOCK(ifp);
1852 return (struct in6_ifaddr *)ifa;
1855 /* use the last-resort values, that are, deprecated addresses */
1857 ifa_ref((struct ifaddr *)dep[0]);
1858 IF_ADDR_RUNLOCK(ifp);
1862 ifa_ref((struct ifaddr *)dep[1]);
1863 IF_ADDR_RUNLOCK(ifp);
1867 IF_ADDR_RUNLOCK(ifp);
1872 * perform DAD when interface becomes IFF_UP.
1875 in6_if_up(struct ifnet *ifp)
1878 struct in6_ifaddr *ia;
1881 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1882 if (ifa->ifa_addr->sa_family != AF_INET6)
1884 ia = (struct in6_ifaddr *)ifa;
1885 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1887 * The TENTATIVE flag was likely set by hand
1888 * beforehand, implicitly indicating the need for DAD.
1889 * We may be able to skip the random delay in this
1890 * case, but we impose delays just in case.
1893 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1896 IF_ADDR_RUNLOCK(ifp);
1899 * special cases, like 6to4, are handled in in6_ifattach
1901 in6_ifattach(ifp, NULL);
1905 in6if_do_dad(struct ifnet *ifp)
1907 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1910 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1911 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1915 * Our DAD routine requires the interface up and running.
1916 * However, some interfaces can be up before the RUNNING
1917 * status. Additionally, users may try to assign addresses
1918 * before the interface becomes up (or running).
1919 * This function returns EAGAIN in that case.
1920 * The caller should mark "tentative" on the address instead of
1921 * performing DAD immediately.
1923 if (!((ifp->if_flags & IFF_UP) &&
1924 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1931 * Calculate max IPv6 MTU through all the interfaces and store it
1937 unsigned long maxmtu = 0;
1940 IFNET_RLOCK_NOSLEEP();
1941 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1942 /* this function can be called during ifnet initialization */
1943 if (!ifp->if_afdata[AF_INET6])
1945 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1946 IN6_LINKMTU(ifp) > maxmtu)
1947 maxmtu = IN6_LINKMTU(ifp);
1949 IFNET_RUNLOCK_NOSLEEP();
1950 if (maxmtu) /* update only when maxmtu is positive */
1951 V_in6_maxmtu = maxmtu;
1955 * Provide the length of interface identifiers to be used for the link attached
1956 * to the given interface. The length should be defined in "IPv6 over
1957 * xxx-link" document. Note that address architecture might also define
1958 * the length for a particular set of address prefixes, regardless of the
1959 * link type. As clarified in rfc2462bis, those two definitions should be
1960 * consistent, and those really are as of August 2004.
1963 in6_if2idlen(struct ifnet *ifp)
1965 switch (ifp->if_type) {
1966 case IFT_ETHER: /* RFC2464 */
1967 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
1968 case IFT_L2VLAN: /* ditto */
1969 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
1970 case IFT_INFINIBAND:
1972 case IFT_FDDI: /* RFC2467 */
1974 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
1976 case IFT_PPP: /* RFC2472 */
1978 case IFT_ARCNET: /* RFC2497 */
1980 case IFT_FRELAY: /* RFC2590 */
1982 case IFT_IEEE1394: /* RFC3146 */
1985 return (64); /* draft-ietf-v6ops-mech-v2-07 */
1987 return (64); /* XXX: is this really correct? */
1990 * Unknown link type:
1991 * It might be controversial to use the today's common constant
1992 * of 64 for these cases unconditionally. For full compliance,
1993 * we should return an error in this case. On the other hand,
1994 * if we simply miss the standard for the link type or a new
1995 * standard is defined for a new link type, the IFID length
1996 * is very likely to be the common constant. As a compromise,
1997 * we always use the constant, but make an explicit notice
1998 * indicating the "unknown" case.
2000 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2005 #include <sys/sysctl.h>
2007 struct in6_llentry {
2008 struct llentry base;
2011 #define IN6_LLTBL_DEFAULT_HSIZE 32
2012 #define IN6_LLTBL_HASH(k, h) \
2013 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2016 * Do actual deallocation of @lle.
2019 in6_lltable_destroy_lle_unlocked(struct llentry *lle)
2022 LLE_LOCK_DESTROY(lle);
2023 LLE_REQ_DESTROY(lle);
2024 free(lle, M_LLTABLE);
2028 * Called by LLE_FREE_LOCKED when number of references
2032 in6_lltable_destroy_lle(struct llentry *lle)
2036 in6_lltable_destroy_lle_unlocked(lle);
2039 static struct llentry *
2040 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2042 struct in6_llentry *lle;
2044 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2045 if (lle == NULL) /* NB: caller generates msg */
2048 lle->base.r_l3addr.addr6 = *addr6;
2049 lle->base.lle_refcnt = 1;
2050 lle->base.lle_free = in6_lltable_destroy_lle;
2051 LLE_LOCK_INIT(&lle->base);
2052 LLE_REQ_INIT(&lle->base);
2053 callout_init(&lle->base.lle_timer, 1);
2055 return (&lle->base);
2059 in6_lltable_match_prefix(const struct sockaddr *saddr,
2060 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2062 const struct in6_addr *addr, *mask, *lle_addr;
2064 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2065 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2066 lle_addr = &lle->r_l3addr.addr6;
2068 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2071 if (lle->la_flags & LLE_IFADDR) {
2074 * Delete LLE_IFADDR records IFF address & flag matches.
2075 * Note that addr is the interface address within prefix
2078 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2079 (flags & LLE_STATIC) != 0)
2084 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2085 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2092 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2096 LLE_WLOCK_ASSERT(lle);
2097 KASSERT(llt != NULL, ("lltable is NULL"));
2099 /* Unlink entry from table */
2100 if ((lle->la_flags & LLE_LINKED) != 0) {
2103 IF_AFDATA_WLOCK_ASSERT(ifp);
2104 lltable_unlink_entry(llt, lle);
2107 if (callout_stop(&lle->lle_timer) > 0)
2114 in6_lltable_rtcheck(struct ifnet *ifp,
2116 const struct sockaddr *l3addr)
2118 const struct sockaddr_in6 *sin6;
2119 struct nhop6_basic nh6;
2120 struct in6_addr dst;
2123 char ip6buf[INET6_ADDRSTRLEN];
2126 KASSERT(l3addr->sa_family == AF_INET6,
2127 ("sin_family %d", l3addr->sa_family));
2129 sin6 = (const struct sockaddr_in6 *)l3addr;
2130 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2131 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2132 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6);
2133 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2136 * Create an ND6 cache for an IPv6 neighbor
2137 * that is not covered by our own prefix.
2139 ifa = ifaof_ifpforaddr(l3addr, ifp);
2144 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2145 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2152 * Called by the datapath to indicate that the entry was used.
2155 in6_lltable_mark_used(struct llentry *lle)
2159 lle->r_skip_req = 0;
2162 * Set the hit time so the callback function
2163 * can determine the remaining time before
2164 * transiting to the DELAY state.
2166 lle->lle_hittime = time_uptime;
2167 LLE_REQ_UNLOCK(lle);
2170 static inline uint32_t
2171 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2174 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2178 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2181 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2185 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2187 struct sockaddr_in6 *sin6;
2189 sin6 = (struct sockaddr_in6 *)sa;
2190 bzero(sin6, sizeof(*sin6));
2191 sin6->sin6_family = AF_INET6;
2192 sin6->sin6_len = sizeof(*sin6);
2193 sin6->sin6_addr = lle->r_l3addr.addr6;
2196 static inline struct llentry *
2197 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2199 struct llentry *lle;
2200 struct llentries *lleh;
2203 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2204 lleh = &llt->lle_head[hashidx];
2205 LIST_FOREACH(lle, lleh, lle_next) {
2206 if (lle->la_flags & LLE_DELETED)
2208 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2216 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2219 lle->la_flags |= LLE_DELETED;
2220 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2222 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2227 static struct llentry *
2228 in6_lltable_alloc(struct lltable *llt, u_int flags,
2229 const struct sockaddr *l3addr)
2231 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2232 struct ifnet *ifp = llt->llt_ifp;
2233 struct llentry *lle;
2234 char linkhdr[LLE_MAX_LINKHDR];
2238 KASSERT(l3addr->sa_family == AF_INET6,
2239 ("sin_family %d", l3addr->sa_family));
2242 * A route that covers the given address must have
2243 * been installed 1st because we are doing a resolution,
2246 if (!(flags & LLE_IFADDR) &&
2247 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2250 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2252 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2255 lle->la_flags = flags;
2256 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2257 linkhdrsize = LLE_MAX_LINKHDR;
2258 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2259 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2260 in6_lltable_destroy_lle_unlocked(lle);
2263 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2265 lle->la_flags |= LLE_STATIC;
2268 if ((lle->la_flags & LLE_STATIC) != 0)
2269 lle->ln_state = ND6_LLINFO_REACHABLE;
2274 static struct llentry *
2275 in6_lltable_lookup(struct lltable *llt, u_int flags,
2276 const struct sockaddr *l3addr)
2278 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2279 struct llentry *lle;
2281 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2282 KASSERT(l3addr->sa_family == AF_INET6,
2283 ("sin_family %d", l3addr->sa_family));
2285 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2290 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) !=
2291 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X",
2294 if (flags & LLE_UNLOCKED)
2297 if (flags & LLE_EXCLUSIVE)
2305 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2306 struct sysctl_req *wr)
2308 struct ifnet *ifp = llt->llt_ifp;
2311 struct rt_msghdr rtm;
2312 struct sockaddr_in6 sin6;
2314 * ndp.c assumes that sdl is word aligned
2319 struct sockaddr_dl sdl;
2321 struct sockaddr_dl *sdl;
2324 bzero(&ndpc, sizeof(ndpc));
2325 /* skip deleted entries */
2326 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2328 /* Skip if jailed and not a valid IP of the prison. */
2329 lltable_fill_sa_entry(lle,
2330 (struct sockaddr *)&ndpc.sin6);
2331 if (prison_if(wr->td->td_ucred,
2332 (struct sockaddr *)&ndpc.sin6) != 0)
2335 * produce a msg made of:
2337 * struct sockaddr_in6 (IPv6)
2338 * struct sockaddr_dl;
2340 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2341 ndpc.rtm.rtm_version = RTM_VERSION;
2342 ndpc.rtm.rtm_type = RTM_GET;
2343 ndpc.rtm.rtm_flags = RTF_UP;
2344 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2345 if (V_deembed_scopeid)
2346 sa6_recoverscope(&ndpc.sin6);
2349 if (lle->la_flags & LLE_PUB)
2350 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2353 sdl->sdl_family = AF_LINK;
2354 sdl->sdl_len = sizeof(*sdl);
2355 sdl->sdl_index = ifp->if_index;
2356 sdl->sdl_type = ifp->if_type;
2357 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2358 sdl->sdl_alen = ifp->if_addrlen;
2359 bcopy(lle->ll_addr, LLADDR(sdl),
2363 bzero(LLADDR(sdl), ifp->if_addrlen);
2365 if (lle->la_expire != 0)
2366 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2367 lle->lle_remtime / hz +
2368 time_second - time_uptime;
2369 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2370 if (lle->la_flags & LLE_STATIC)
2371 ndpc.rtm.rtm_flags |= RTF_STATIC;
2372 if (lle->la_flags & LLE_IFADDR)
2373 ndpc.rtm.rtm_flags |= RTF_PINNED;
2374 if (lle->ln_router != 0)
2375 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2376 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2377 /* Store state in rmx_weight value */
2378 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2379 ndpc.rtm.rtm_index = ifp->if_index;
2380 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2385 static struct lltable *
2386 in6_lltattach(struct ifnet *ifp)
2388 struct lltable *llt;
2390 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2391 llt->llt_af = AF_INET6;
2394 llt->llt_lookup = in6_lltable_lookup;
2395 llt->llt_alloc_entry = in6_lltable_alloc;
2396 llt->llt_delete_entry = in6_lltable_delete_entry;
2397 llt->llt_dump_entry = in6_lltable_dump_entry;
2398 llt->llt_hash = in6_lltable_hash;
2399 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2400 llt->llt_free_entry = in6_lltable_free_entry;
2401 llt->llt_match_prefix = in6_lltable_match_prefix;
2402 llt->llt_mark_used = in6_lltable_mark_used;
2409 in6_domifattach(struct ifnet *ifp)
2411 struct in6_ifextra *ext;
2413 /* There are not IPv6-capable interfaces. */
2414 switch (ifp->if_type) {
2420 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2421 bzero(ext, sizeof(*ext));
2423 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2424 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2425 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2426 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2428 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2429 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2431 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2432 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2434 ext->nd_ifinfo = nd6_ifattach(ifp);
2435 ext->scope6_id = scope6_ifattach(ifp);
2436 ext->lltable = in6_lltattach(ifp);
2438 ext->mld_ifinfo = mld_domifattach(ifp);
2444 in6_domifmtu(struct ifnet *ifp)
2446 if (ifp->if_afdata[AF_INET6] == NULL)
2449 return (IN6_LINKMTU(ifp));
2453 in6_domifdetach(struct ifnet *ifp, void *aux)
2455 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2457 mld_domifdetach(ifp);
2458 scope6_ifdetach(ext->scope6_id);
2459 nd6_ifdetach(ifp, ext->nd_ifinfo);
2460 lltable_free(ext->lltable);
2461 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2462 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2463 free(ext->in6_ifstat, M_IFADDR);
2464 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2465 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2466 free(ext->icmp6_ifstat, M_IFADDR);
2467 free(ext, M_IFADDR);
2471 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2472 * v4 mapped addr or v4 compat addr
2475 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2478 bzero(sin, sizeof(*sin));
2479 sin->sin_len = sizeof(struct sockaddr_in);
2480 sin->sin_family = AF_INET;
2481 sin->sin_port = sin6->sin6_port;
2482 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2485 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2487 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2489 bzero(sin6, sizeof(*sin6));
2490 sin6->sin6_len = sizeof(struct sockaddr_in6);
2491 sin6->sin6_family = AF_INET6;
2492 sin6->sin6_port = sin->sin_port;
2493 sin6->sin6_addr.s6_addr32[0] = 0;
2494 sin6->sin6_addr.s6_addr32[1] = 0;
2495 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2496 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2499 /* Convert sockaddr_in6 into sockaddr_in. */
2501 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2503 struct sockaddr_in *sin_p;
2504 struct sockaddr_in6 sin6;
2507 * Save original sockaddr_in6 addr and convert it
2510 sin6 = *(struct sockaddr_in6 *)nam;
2511 sin_p = (struct sockaddr_in *)nam;
2512 in6_sin6_2_sin(sin_p, &sin6);
2515 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2517 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2519 struct sockaddr_in *sin_p;
2520 struct sockaddr_in6 *sin6_p;
2522 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2523 sin_p = (struct sockaddr_in *)*nam;
2524 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2525 free(*nam, M_SONAME);
2526 *nam = (struct sockaddr *)sin6_p;