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("$FreeBSD$");
69 #include "opt_inet6.h"
71 #include <sys/param.h>
72 #include <sys/eventhandler.h>
73 #include <sys/errno.h>
75 #include <sys/malloc.h>
76 #include <sys/socket.h>
77 #include <sys/socketvar.h>
78 #include <sys/sockio.h>
79 #include <sys/systm.h>
82 #include <sys/protosw.h>
84 #include <sys/kernel.h>
86 #include <sys/rmlock.h>
87 #include <sys/sysctl.h>
88 #include <sys/syslog.h>
91 #include <net/if_var.h>
92 #include <net/if_types.h>
93 #include <net/route.h>
94 #include <net/route/route_ctl.h>
95 #include <net/route/nhop.h>
96 #include <net/if_dl.h>
99 #include <netinet/in.h>
100 #include <netinet/in_var.h>
101 #include <net/if_llatbl.h>
102 #include <netinet/if_ether.h>
103 #include <netinet/in_systm.h>
104 #include <netinet/ip.h>
105 #include <netinet/in_pcb.h>
106 #include <netinet/ip_carp.h>
108 #include <netinet/ip6.h>
109 #include <netinet6/ip6_var.h>
110 #include <netinet6/nd6.h>
111 #include <netinet6/mld6_var.h>
112 #include <netinet6/ip6_mroute.h>
113 #include <netinet6/in6_ifattach.h>
114 #include <netinet6/scope6_var.h>
115 #include <netinet6/in6_fib.h>
116 #include <netinet6/in6_pcb.h>
119 * struct in6_ifreq and struct ifreq must be type punnable for common members
120 * of ifr_ifru to allow accessors to be shared.
122 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
123 offsetof(struct ifreq, ifr_ifru),
124 "struct in6_ifreq and struct ifreq are not type punnable");
126 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
127 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
130 * Definitions of some costant IP6 addresses.
132 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
133 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
134 const struct in6_addr in6addr_nodelocal_allnodes =
135 IN6ADDR_NODELOCAL_ALLNODES_INIT;
136 const struct in6_addr in6addr_linklocal_allnodes =
137 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
138 const struct in6_addr in6addr_linklocal_allrouters =
139 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
140 const struct in6_addr in6addr_linklocal_allv2routers =
141 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
143 const struct in6_addr in6mask0 = IN6MASK0;
144 const struct in6_addr in6mask32 = IN6MASK32;
145 const struct in6_addr in6mask64 = IN6MASK64;
146 const struct in6_addr in6mask96 = IN6MASK96;
147 const struct in6_addr in6mask128 = IN6MASK128;
149 const struct sockaddr_in6 sa6_any =
150 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
152 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
153 struct in6_aliasreq *, int);
154 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
156 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
157 struct in6_ifaddr *, int);
158 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
159 struct in6_aliasreq *, int flags);
160 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
161 struct in6_ifaddr *, int, int);
162 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
163 struct in6_ifaddr *, int);
165 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
166 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
169 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
171 struct rt_addrinfo info;
173 struct sockaddr_dl gateway;
179 * Prepare info data for the host route.
180 * This code mimics one from ifa_maintain_loopback_route().
182 bzero(&info, sizeof(struct rt_addrinfo));
183 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
184 info.rti_info[RTAX_DST] = ifa->ifa_addr;
185 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway;
186 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type);
187 if (cmd != RTM_DELETE)
188 info.rti_ifp = V_loif;
190 fibnum = ia62ifa(ia)->ifa_ifp->if_fib;
192 if (cmd == RTM_ADD) {
193 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
194 rt_routemsg_info(cmd, &info, fibnum);
195 } else if (cmd == RTM_DELETE) {
196 rt_routemsg_info(cmd, &info, fibnum);
197 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
202 in6_mask2len(struct in6_addr *mask, u_char *lim0)
205 u_char *lim = lim0, *p;
207 /* ignore the scope_id part */
208 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
209 lim = (u_char *)mask + sizeof(*mask);
210 for (p = (u_char *)mask; p < lim; x++, p++) {
216 for (y = 0; y < 8; y++) {
217 if ((*p & (0x80 >> y)) == 0)
223 * when the limit pointer is given, do a stricter check on the
227 if (y != 0 && (*p & (0x00ff >> y)) != 0)
229 for (p = p + 1; p < lim; p++)
237 #ifdef COMPAT_FREEBSD32
238 struct in6_ndifreq32 {
239 char ifname[IFNAMSIZ];
242 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
246 in6_control(struct socket *so, u_long cmd, caddr_t data,
247 struct ifnet *ifp, struct thread *td)
249 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
250 struct in6_ifaddr *ia = NULL;
251 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
252 struct sockaddr_in6 *sa6;
253 int carp_attached = 0;
258 * Compat to make pre-10.x ifconfig(8) operable.
260 if (cmd == OSIOCAIFADDR_IN6)
261 cmd = SIOCAIFADDR_IN6;
264 case SIOCGETSGCNT_IN6:
265 case SIOCGETMIFCNT_IN6:
267 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
268 * We cannot see how that would be needed, so do not adjust the
269 * KPI blindly; more likely should clean up the IPv4 variant.
271 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
275 case SIOCAADDRCTL_POLICY:
276 case SIOCDADDRCTL_POLICY:
278 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
282 return (in6_src_ioctl(cmd, data));
289 case SIOCSNDFLUSH_IN6:
290 case SIOCSPFXFLUSH_IN6:
291 case SIOCSRTRFLUSH_IN6:
292 case SIOCSDEFIFACE_IN6:
293 case SIOCSIFINFO_FLAGS:
294 case SIOCSIFINFO_IN6:
296 error = priv_check(td, PRIV_NETINET_ND6);
301 case OSIOCGIFINFO_IN6:
302 case SIOCGIFINFO_IN6:
303 case SIOCGNBRINFO_IN6:
304 case SIOCGDEFIFACE_IN6:
305 return (nd6_ioctl(cmd, data, ifp));
307 #ifdef COMPAT_FREEBSD32
308 case SIOCGDEFIFACE32_IN6:
310 struct in6_ndifreq ndif;
311 struct in6_ndifreq32 *ndif32;
313 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
317 ndif32 = (struct in6_ndifreq32 *)data;
318 ndif32->ifindex = ndif.ifindex;
325 case SIOCSIFPREFIX_IN6:
326 case SIOCDIFPREFIX_IN6:
327 case SIOCAIFPREFIX_IN6:
328 case SIOCCIFPREFIX_IN6:
329 case SIOCSGIFPREFIX_IN6:
330 case SIOCGIFPREFIX_IN6:
332 "prefix ioctls are now invalidated. "
333 "please use ifconfig.\n");
340 error = priv_check(td, PRIV_NETINET_SCOPE6);
347 return (scope6_ioctl(cmd, data, ifp));
351 * Find address for this interface, if it exists.
353 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
354 * only, and used the first interface address as the target of other
355 * operations (without checking ifra_addr). This was because netinet
356 * code/API assumed at most 1 interface address per interface.
357 * Since IPv6 allows a node to assign multiple addresses
358 * on a single interface, we almost always look and check the
359 * presence of ifra_addr, and reject invalid ones here.
360 * It also decreases duplicated code among SIOC*_IN6 operations.
363 case SIOCAIFADDR_IN6:
364 case SIOCSIFPHYADDR_IN6:
365 sa6 = &ifra->ifra_addr;
367 case SIOCSIFADDR_IN6:
368 case SIOCGIFADDR_IN6:
369 case SIOCSIFDSTADDR_IN6:
370 case SIOCSIFNETMASK_IN6:
371 case SIOCGIFDSTADDR_IN6:
372 case SIOCGIFNETMASK_IN6:
373 case SIOCDIFADDR_IN6:
374 case SIOCGIFPSRCADDR_IN6:
375 case SIOCGIFPDSTADDR_IN6:
376 case SIOCGIFAFLAG_IN6:
377 case SIOCSNDFLUSH_IN6:
378 case SIOCSPFXFLUSH_IN6:
379 case SIOCSRTRFLUSH_IN6:
380 case SIOCGIFALIFETIME_IN6:
381 case SIOCGIFSTAT_IN6:
382 case SIOCGIFSTAT_ICMP6:
383 sa6 = &ifr->ifr_addr;
390 * Although we should pass any non-INET6 ioctl requests
391 * down to driver, we filter some legacy INET requests.
392 * Drivers trust SIOCSIFADDR et al to come from an already
393 * privileged layer, and do not perform any credentials
394 * checks or input validation.
401 if (sa6 && sa6->sin6_family == AF_INET6) {
402 if (sa6->sin6_scope_id != 0)
403 error = sa6_embedscope(sa6, 0);
405 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
408 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
409 &sa6->sin6_addr)) != 0)
411 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
416 case SIOCSIFADDR_IN6:
417 case SIOCSIFDSTADDR_IN6:
418 case SIOCSIFNETMASK_IN6:
420 * Since IPv6 allows a node to assign multiple addresses
421 * on a single interface, SIOCSIFxxx ioctls are deprecated.
423 /* we decided to obsolete this command (20000704) */
427 case SIOCDIFADDR_IN6:
429 * for IPv4, we look for existing in_ifaddr here to allow
430 * "ifconfig if0 delete" to remove the first IPv4 address on
431 * the interface. For IPv6, as the spec allows multiple
432 * interface address from the day one, we consider "remove the
433 * first one" semantics to be not preferable.
436 error = EADDRNOTAVAIL;
440 case SIOCAIFADDR_IN6:
442 * We always require users to specify a valid IPv6 address for
443 * the corresponding operation.
445 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
446 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
447 error = EAFNOSUPPORT;
452 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
453 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
458 case SIOCGIFSTAT_IN6:
459 case SIOCGIFSTAT_ICMP6:
460 if (ifp->if_afdata[AF_INET6] == NULL) {
461 error = EPFNOSUPPORT;
466 case SIOCGIFADDR_IN6:
467 /* This interface is basically deprecated. use SIOCGIFCONF. */
469 case SIOCGIFAFLAG_IN6:
470 case SIOCGIFNETMASK_IN6:
471 case SIOCGIFDSTADDR_IN6:
472 case SIOCGIFALIFETIME_IN6:
473 /* must think again about its semantics */
475 error = EADDRNOTAVAIL;
482 case SIOCGIFADDR_IN6:
483 ifr->ifr_addr = ia->ia_addr;
484 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
488 case SIOCGIFDSTADDR_IN6:
489 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
493 ifr->ifr_dstaddr = ia->ia_dstaddr;
494 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
498 case SIOCGIFNETMASK_IN6:
499 ifr->ifr_addr = ia->ia_prefixmask;
502 case SIOCGIFAFLAG_IN6:
503 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
506 case SIOCGIFSTAT_IN6:
507 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
508 ifp->if_afdata[AF_INET6])->in6_ifstat,
509 &ifr->ifr_ifru.ifru_stat,
510 sizeof(struct in6_ifstat) / sizeof(uint64_t));
513 case SIOCGIFSTAT_ICMP6:
514 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
515 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
516 &ifr->ifr_ifru.ifru_icmp6stat,
517 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
520 case SIOCGIFALIFETIME_IN6:
521 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
522 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
524 struct in6_addrlifetime *retlt =
525 &ifr->ifr_ifru.ifru_lifetime;
528 * XXX: adjust expiration time assuming time_t is
532 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
533 if (ia->ia6_lifetime.ia6t_vltime <
534 maxexpire - ia->ia6_updatetime) {
535 retlt->ia6t_expire = ia->ia6_updatetime +
536 ia->ia6_lifetime.ia6t_vltime;
538 retlt->ia6t_expire = maxexpire;
540 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
542 struct in6_addrlifetime *retlt =
543 &ifr->ifr_ifru.ifru_lifetime;
546 * XXX: adjust expiration time assuming time_t is
550 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
551 if (ia->ia6_lifetime.ia6t_pltime <
552 maxexpire - ia->ia6_updatetime) {
553 retlt->ia6t_preferred = ia->ia6_updatetime +
554 ia->ia6_lifetime.ia6t_pltime;
556 retlt->ia6t_preferred = maxexpire;
560 case SIOCAIFADDR_IN6:
562 struct nd_prefixctl pr0;
563 struct nd_prefix *pr;
566 * first, make or update the interface address structure,
567 * and link it to the list.
569 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
572 if (ia->ia_ifa.ifa_carp)
573 (*carp_detach_p)(&ia->ia_ifa, true);
574 ifa_free(&ia->ia_ifa);
576 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
579 * this can happen when the user specify the 0 valid
585 if (cmd == ocmd && ifra->ifra_vhid > 0) {
586 if (carp_attach_p != NULL)
587 error = (*carp_attach_p)(&ia->ia_ifa,
590 error = EPROTONOSUPPORT;
598 * then, make the prefix on-link on the interface.
599 * XXX: we'd rather create the prefix before the address, but
600 * we need at least one address to install the corresponding
601 * interface route, so we configure the address first.
605 * convert mask to prefix length (prefixmask has already
606 * been validated in in6_update_ifa().
608 bzero(&pr0, sizeof(pr0));
610 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
612 if (pr0.ndpr_plen == 128) {
613 /* we don't need to install a host route. */
616 pr0.ndpr_prefix = ifra->ifra_addr;
617 /* apply the mask for safety. */
618 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
619 &ifra->ifra_prefixmask.sin6_addr);
622 * XXX: since we don't have an API to set prefix (not address)
623 * lifetimes, we just use the same lifetimes as addresses.
624 * The (temporarily) installed lifetimes can be overridden by
625 * later advertised RAs (when accept_rtadv is non 0), which is
626 * an intended behavior.
628 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
630 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
631 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
632 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
634 /* add the prefix if not yet. */
635 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
637 * nd6_prelist_add will install the corresponding
640 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
642 (*carp_detach_p)(&ia->ia_ifa, false);
647 /* relate the address to the prefix */
648 if (ia->ia6_ndpr == NULL) {
653 * If this is the first autoconf address from the
654 * prefix, create a temporary address as well
657 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
658 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
660 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
661 log(LOG_NOTICE, "in6_control: failed "
662 "to create a temporary address, "
670 * this might affect the status of autoconfigured addresses,
671 * that is, this address might make other addresses detached.
673 pfxlist_onlink_check();
677 * Try to clear the flag when a new IPv6 address is added
678 * onto an IFDISABLED interface and it succeeds.
680 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
681 struct in6_ndireq nd;
683 memset(&nd, 0, sizeof(nd));
684 nd.ndi.flags = ND_IFINFO(ifp)->flags;
685 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
686 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
687 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
688 "SIOCSIFINFO_FLAGS for -ifdisabled "
691 * Ignore failure of clearing the flag intentionally.
692 * The failure means address duplication was detected.
698 case SIOCDIFADDR_IN6:
700 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
705 if (ifp->if_ioctl == NULL) {
709 error = (*ifp->if_ioctl)(ifp, cmd, data);
716 ifa_free(&ia->ia_ifa);
720 static struct in6_multi_mship *
721 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
722 int *errorp, int delay)
724 struct in6_multi_mship *imm;
727 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
733 delay = (delay * PR_FASTHZ) / hz;
735 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
738 free(imm, M_IP6MADDR);
745 * Join necessary multicast groups. Factored out from in6_update_ifa().
746 * This entire work should only be done once, for the default FIB.
749 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
750 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
752 char ip6buf[INET6_ADDRSTRLEN];
753 struct in6_addr mltaddr;
754 struct in6_multi_mship *imm;
757 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
759 /* Join solicited multicast addr for new host id. */
760 bzero(&mltaddr, sizeof(struct in6_addr));
761 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
762 mltaddr.s6_addr32[2] = htonl(1);
763 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
764 mltaddr.s6_addr8[12] = 0xff;
765 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
766 /* XXX: should not happen */
767 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
771 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
773 * We need a random delay for DAD on the address being
774 * configured. It also means delaying transmission of the
775 * corresponding MLD report to avoid report collision.
776 * [RFC 4861, Section 6.3.7]
778 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
780 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
782 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
783 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
784 if_name(ifp), error));
787 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
788 *in6m_sol = imm->i6mm_maddr;
791 * Join link-local all-nodes address.
793 mltaddr = in6addr_linklocal_allnodes;
794 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
795 goto cleanup; /* XXX: should not fail */
797 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
799 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
800 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
801 if_name(ifp), error));
804 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
807 * Join node information group address.
810 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
812 * The spec does not say anything about delay for this group,
813 * but the same logic should apply.
815 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
817 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
819 imm = in6_joingroup_legacy(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);
829 if (V_icmp6_nodeinfo_oldmcprefix &&
830 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
831 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
834 "%s: in6_joingroup failed for %s on %s "
835 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
836 &mltaddr), if_name(ifp), error));
837 /* XXX not very fatal, go on... */
839 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
843 * Join interface-local all-nodes address.
844 * (ff01::1%ifN, and ff01::%ifN/32)
846 mltaddr = in6addr_nodelocal_allnodes;
847 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
848 goto cleanup; /* XXX: should not fail */
850 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
852 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
853 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
854 &mltaddr), if_name(ifp), error));
857 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
864 * Update parameters of an IPv6 interface address.
865 * If necessary, a new entry is created and linked into address chains.
866 * This function is separated from in6_control().
869 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
870 struct in6_ifaddr *ia, int flags)
872 int error, hostIsNew = 0;
874 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
879 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
883 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
885 if (hostIsNew != 0) {
886 in6_unlink_ifa(ia, ifp);
887 ifa_free(&ia->ia_ifa);
893 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
899 * Fill in basic IPv6 address request info.
902 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
903 const struct in6_addr *mask)
906 memset(ifra, 0, sizeof(struct in6_aliasreq));
908 ifra->ifra_addr.sin6_family = AF_INET6;
909 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
911 ifra->ifra_addr.sin6_addr = *addr;
913 ifra->ifra_prefixmask.sin6_family = AF_INET6;
914 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
916 ifra->ifra_prefixmask.sin6_addr = *mask;
920 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
921 struct in6_ifaddr *ia, int flags)
924 struct sockaddr_in6 dst6;
925 struct in6_addrlifetime *lt;
926 char ip6buf[INET6_ADDRSTRLEN];
928 /* Validate parameters */
929 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
933 * The destination address for a p2p link must have a family
934 * of AF_UNSPEC or AF_INET6.
936 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
937 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
938 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
939 return (EAFNOSUPPORT);
944 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
945 ifra->ifra_addr.sin6_family != AF_INET6)
949 * validate ifra_prefixmask. don't check sin6_family, netmask
950 * does not carry fields other than sin6_len.
952 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
955 * Because the IPv6 address architecture is classless, we require
956 * users to specify a (non 0) prefix length (mask) for a new address.
957 * We also require the prefix (when specified) mask is valid, and thus
958 * reject a non-consecutive mask.
960 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
962 if (ifra->ifra_prefixmask.sin6_len != 0) {
963 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
964 (u_char *)&ifra->ifra_prefixmask +
965 ifra->ifra_prefixmask.sin6_len);
970 * In this case, ia must not be NULL. We just use its prefix
973 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
976 * If the destination address on a p2p interface is specified,
977 * and the address is a scoped one, validate/set the scope
980 dst6 = ifra->ifra_dstaddr;
981 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
982 (dst6.sin6_family == AF_INET6)) {
983 struct in6_addr in6_tmp;
986 in6_tmp = dst6.sin6_addr;
987 if (in6_setscope(&in6_tmp, ifp, &zoneid))
988 return (EINVAL); /* XXX: should be impossible */
990 if (dst6.sin6_scope_id != 0) {
991 if (dst6.sin6_scope_id != zoneid)
993 } else /* user omit to specify the ID. */
994 dst6.sin6_scope_id = zoneid;
996 /* convert into the internal form */
997 if (sa6_embedscope(&dst6, 0))
998 return (EINVAL); /* XXX: should be impossible */
1000 /* Modify original ifra_dstaddr to reflect changes */
1001 ifra->ifra_dstaddr = dst6;
1004 * The destination address can be specified only for a p2p or a
1005 * loopback interface. If specified, the corresponding prefix length
1008 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1009 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1010 /* XXX: noisy message */
1011 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1012 "be specified for a p2p or a loopback IF only\n"));
1016 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1017 "be 128 when dstaddr is specified\n"));
1021 /* lifetime consistency check */
1022 lt = &ifra->ifra_lifetime;
1023 if (lt->ia6t_pltime > lt->ia6t_vltime)
1025 if (lt->ia6t_vltime == 0) {
1027 * the following log might be noisy, but this is a typical
1028 * configuration mistake or a tool's bug.
1031 "in6_update_ifa: valid lifetime is 0 for %s\n",
1032 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1035 return (0); /* there's nothing to do */
1038 /* Check prefix mask */
1039 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1041 * We prohibit changing the prefix length of an existing
1043 * + such an operation should be rare in IPv6, and
1044 * + the operation would confuse prefix management.
1046 if (ia->ia_prefixmask.sin6_len != 0 &&
1047 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1048 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1049 "of an existing %s address should not be changed\n",
1050 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1060 * Allocate a new ifaddr and link it into chains.
1062 static struct in6_ifaddr *
1063 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1065 struct in6_ifaddr *ia;
1068 * When in6_alloc_ifa() is called in a process of a received
1069 * RA, it is called under an interrupt context. So, we should
1070 * call malloc with M_NOWAIT.
1072 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1075 LIST_INIT(&ia->ia6_memberships);
1076 /* Initialize the address and masks, and put time stamp */
1077 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1078 ia->ia_addr.sin6_family = AF_INET6;
1079 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1080 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1081 ia->ia_addr = ifra->ifra_addr;
1082 ia->ia6_createtime = time_uptime;
1083 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1085 * Some functions expect that ifa_dstaddr is not
1086 * NULL for p2p interfaces.
1088 ia->ia_ifa.ifa_dstaddr =
1089 (struct sockaddr *)&ia->ia_dstaddr;
1091 ia->ia_ifa.ifa_dstaddr = NULL;
1094 /* set prefix mask if any */
1095 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1096 if (ifra->ifra_prefixmask.sin6_len != 0) {
1097 ia->ia_prefixmask.sin6_family = AF_INET6;
1098 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1099 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1103 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1105 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1106 IF_ADDR_WUNLOCK(ifp);
1108 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1110 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1111 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1112 IN6_IFADDR_WUNLOCK();
1118 * Update/configure interface address parameters:
1120 * 1) Update lifetime
1121 * 2) Update interface metric ad flags
1122 * 3) Notify other subsystems
1125 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1126 struct in6_ifaddr *ia, int hostIsNew, int flags)
1130 /* update timestamp */
1131 ia->ia6_updatetime = time_uptime;
1134 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1135 * to see if the address is deprecated or invalidated, but initialize
1136 * these members for applications.
1138 ia->ia6_lifetime = ifra->ifra_lifetime;
1139 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1140 ia->ia6_lifetime.ia6t_expire =
1141 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1143 ia->ia6_lifetime.ia6t_expire = 0;
1144 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1145 ia->ia6_lifetime.ia6t_preferred =
1146 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1148 ia->ia6_lifetime.ia6t_preferred = 0;
1151 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1152 * userland, make it deprecated.
1154 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1155 ia->ia6_lifetime.ia6t_pltime = 0;
1156 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1160 * configure address flags.
1162 ia->ia6_flags = ifra->ifra_flags;
1165 * Make the address tentative before joining multicast addresses,
1166 * so that corresponding MLD responses would not have a tentative
1169 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1172 * DAD should be performed for an new address or addresses on
1173 * an interface with ND6_IFF_IFDISABLED.
1175 if (in6if_do_dad(ifp) &&
1176 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1177 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1179 /* notify other subsystems */
1180 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1186 * Do link-level ifa job:
1187 * 1) Add lle entry for added address
1188 * 2) Notifies routing socket users about new address
1189 * 3) join appropriate multicast group
1190 * 4) start DAD if enabled
1193 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1194 struct in6_ifaddr *ia, int flags)
1196 struct in6_multi *in6m_sol;
1199 /* Add local address to lltable, if necessary (ex. on p2p link). */
1200 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1201 in6_purgeaddr(&ia->ia_ifa);
1202 ifa_free(&ia->ia_ifa);
1206 /* Join necessary multicast groups. */
1208 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1209 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1211 in6_purgeaddr(&ia->ia_ifa);
1212 ifa_free(&ia->ia_ifa);
1217 /* Perform DAD, if the address is TENTATIVE. */
1218 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1219 int delay, mindelay, maxdelay;
1222 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1224 * We need to impose a delay before sending an NS
1225 * for DAD. Check if we also needed a delay for the
1226 * corresponding MLD message. If we did, the delay
1227 * should be larger than the MLD delay (this could be
1228 * relaxed a bit, but this simple logic is at least
1230 * XXX: Break data hiding guidelines and look at
1231 * state for the solicited multicast group.
1234 if (in6m_sol != NULL &&
1235 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1236 mindelay = in6m_sol->in6m_timer;
1238 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1239 if (maxdelay - mindelay == 0)
1243 (arc4random() % (maxdelay - mindelay)) +
1247 nd6_dad_start((struct ifaddr *)ia, delay);
1250 in6_newaddrmsg(ia, RTM_ADD);
1251 ifa_free(&ia->ia_ifa);
1256 * Adds or deletes interface route for p2p ifa.
1257 * Returns 0 on success or errno.
1260 in6_handle_dstaddr_rtrequest(int cmd, struct in6_ifaddr *ia)
1262 struct epoch_tracker et;
1263 struct ifaddr *ifa = &ia->ia_ifa;
1266 /* Prepare gateway */
1267 struct sockaddr_dl_short sdl = {
1268 .sdl_family = AF_LINK,
1269 .sdl_len = sizeof(struct sockaddr_dl_short),
1270 .sdl_type = ifa->ifa_ifp->if_type,
1271 .sdl_index = ifa->ifa_ifp->if_index,
1274 struct sockaddr_in6 dst = {
1275 .sin6_family = AF_INET6,
1276 .sin6_len = sizeof(struct sockaddr_in6),
1277 .sin6_addr = ia->ia_dstaddr.sin6_addr,
1280 struct rt_addrinfo info = {
1282 .rti_flags = RTF_PINNED | RTF_HOST,
1284 [RTAX_DST] = (struct sockaddr *)&dst,
1285 [RTAX_GATEWAY] = (struct sockaddr *)&sdl,
1288 /* Don't set additional per-gw filters on removal */
1290 NET_EPOCH_ENTER(et);
1291 error = rib_handle_ifaddr_info(ifa->ifa_ifp->if_fib, cmd, &info);
1298 in6_purgeaddr(struct ifaddr *ifa)
1300 struct ifnet *ifp = ifa->ifa_ifp;
1301 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1302 struct in6_multi_mship *imm;
1306 (*carp_detach_p)(ifa, false);
1309 * Remove the loopback route to the interface address.
1310 * The check for the current setting of "nd6_useloopback"
1313 if (ia->ia_flags & IFA_RTSELF) {
1314 error = ifa_del_loopback_route((struct ifaddr *)ia,
1315 (struct sockaddr *)&ia->ia_addr);
1317 ia->ia_flags &= ~IFA_RTSELF;
1320 /* stop DAD processing */
1323 /* Leave multicast groups. */
1324 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1325 LIST_REMOVE(imm, i6mm_chain);
1326 if (imm->i6mm_maddr != NULL)
1327 in6_leavegroup(imm->i6mm_maddr, NULL);
1328 free(imm, M_IP6MADDR);
1330 /* Check if we need to remove p2p route */
1331 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1332 if (ia->ia_dstaddr.sin6_family != AF_INET6)
1334 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1335 error = in6_handle_dstaddr_rtrequest(RTM_DELETE, ia);
1337 log(LOG_INFO, "%s: err=%d, destination address delete "
1338 "failed\n", __func__, error);
1339 ia->ia_flags &= ~IFA_ROUTE;
1342 in6_newaddrmsg(ia, RTM_DELETE);
1343 in6_unlink_ifa(ia, ifp);
1347 * Removes @ia from the corresponding interfaces and unlinks corresponding
1348 * prefix if no addresses are using it anymore.
1351 in6_purgeifaddr(struct in6_ifaddr *ia)
1353 struct nd_prefix *pr;
1356 * If the address being deleted is the only one that owns
1357 * the corresponding prefix, expire the prefix as well.
1358 * XXX: theoretically, we don't have to worry about such
1359 * relationship, since we separate the address management
1360 * and the prefix management. We do this, however, to provide
1361 * as much backward compatibility as possible in terms of
1362 * the ioctl operation.
1363 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
1366 in6_purgeaddr(&ia->ia_ifa);
1367 if (pr != NULL && pr->ndpr_addrcnt == 0) {
1369 nd6_prefix_unlink(pr, NULL);
1377 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1379 char ip6buf[INET6_ADDRSTRLEN];
1383 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1384 IF_ADDR_WUNLOCK(ifp);
1385 ifa_free(&ia->ia_ifa); /* if_addrhead */
1388 * Defer the release of what might be the last reference to the
1389 * in6_ifaddr so that it can't be freed before the remainder of the
1393 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1394 CK_LIST_REMOVE(ia, ia6_hash);
1395 IN6_IFADDR_WUNLOCK();
1398 * Release the reference to the base prefix. There should be a
1399 * positive reference.
1402 if (ia->ia6_ndpr == NULL) {
1404 "in6_unlink_ifa: autoconf'ed address "
1405 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1407 ia->ia6_ndpr->ndpr_addrcnt--;
1408 /* Do not delete lles within prefix if refcont != 0 */
1409 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1411 ia->ia6_ndpr = NULL;
1414 nd6_rem_ifa_lle(ia, remove_lle);
1417 * Also, if the address being removed is autoconf'ed, call
1418 * pfxlist_onlink_check() since the release might affect the status of
1419 * other (detached) addresses.
1421 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1422 pfxlist_onlink_check();
1424 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1428 * Notifies other subsystems about address change/arrival:
1429 * 1) Notifies device handler on the first IPv6 address assignment
1430 * 2) Handle routing table changes for P2P links and route
1431 * 3) Handle routing table changes for address host route
1434 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1435 struct in6_aliasreq *ifra, int hostIsNew)
1437 int error = 0, plen, ifacount = 0;
1439 struct sockaddr_in6 *pdst;
1440 char ip6buf[INET6_ADDRSTRLEN];
1443 * Give the interface a chance to initialize
1444 * if this is its first address,
1446 if (hostIsNew != 0) {
1447 struct epoch_tracker et;
1449 NET_EPOCH_ENTER(et);
1450 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1451 if (ifa->ifa_addr->sa_family != AF_INET6)
1458 if (ifacount <= 1 && ifp->if_ioctl) {
1459 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1465 * If a new destination address is specified, scrub the old one and
1466 * install the new destination. Note that the interface must be
1469 pdst = &ifra->ifra_dstaddr;
1470 if (pdst->sin6_family == AF_INET6 &&
1471 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1472 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1473 (in6_handle_dstaddr_rtrequest(RTM_DELETE, ia) != 0)) {
1474 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1475 "remove a route to the old destination: %s\n",
1476 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1477 /* proceed anyway... */
1479 ia->ia_flags &= ~IFA_ROUTE;
1480 ia->ia_dstaddr = *pdst;
1484 * If a new destination address is specified for a point-to-point
1485 * interface, install a route to the destination as an interface
1487 * XXX: the logic below rejects assigning multiple addresses on a p2p
1488 * interface that share the same destination.
1490 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1491 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1492 ia->ia_dstaddr.sin6_family == AF_INET6) {
1494 * Handle the case for ::1 .
1496 if (ifp->if_flags & IFF_LOOPBACK)
1497 ia->ia_flags |= IFA_RTSELF;
1498 error = in6_handle_dstaddr_rtrequest(RTM_ADD, ia);
1501 ia->ia_flags |= IFA_ROUTE;
1505 * add a loopback route to self if not exists
1507 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1508 error = ifa_add_loopback_route((struct ifaddr *)ia,
1509 (struct sockaddr *)&ia->ia_addr);
1511 ia->ia_flags |= IFA_RTSELF;
1514 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1515 "Invoking IPv6 network device address event may sleep");
1517 ifa_ref(&ia->ia_ifa);
1518 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
1520 ifa_free(&ia->ia_ifa);
1526 * Find an IPv6 interface link-local address specific to an interface.
1527 * ifaddr is returned referenced.
1530 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1536 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1537 if (ifa->ifa_addr->sa_family != AF_INET6)
1539 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1540 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1548 return ((struct in6_ifaddr *)ifa);
1552 * find the interface address corresponding to a given IPv6 address.
1553 * ifaddr is returned referenced.
1556 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1558 struct rm_priotracker in6_ifa_tracker;
1559 struct in6_ifaddr *ia;
1561 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1562 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1563 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1565 zoneid != ia->ia_addr.sin6_scope_id)
1567 ifa_ref(&ia->ia_ifa);
1571 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1576 * find the internet address corresponding to a given interface and address.
1577 * ifaddr is returned referenced.
1580 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1582 struct epoch_tracker et;
1585 NET_EPOCH_ENTER(et);
1586 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1587 if (ifa->ifa_addr->sa_family != AF_INET6)
1589 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1596 return ((struct in6_ifaddr *)ifa);
1600 * Find a link-local scoped address on ifp and return it if any.
1603 in6ifa_llaonifp(struct ifnet *ifp)
1605 struct epoch_tracker et;
1606 struct sockaddr_in6 *sin6;
1609 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1611 NET_EPOCH_ENTER(et);
1612 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1613 if (ifa->ifa_addr->sa_family != AF_INET6)
1615 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1616 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1617 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1618 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1623 return ((struct in6_ifaddr *)ifa);
1627 * Convert IP6 address to printable (loggable) representation. Caller
1628 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1630 static char digits[] = "0123456789abcdef";
1632 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1634 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1636 const u_int16_t *a = (const u_int16_t *)addr;
1638 int dcolon = 0, zero = 0;
1642 for (i = 0; i < 8; i++) {
1643 if (*(a + i) == 0) {
1648 else if (maxcnt < cnt) {
1659 for (i = 0; i < 8; i++) {
1670 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1682 d = (const u_char *)a;
1683 /* Try to eliminate leading zeros in printout like in :0001. */
1685 *cp = digits[*d >> 4];
1690 *cp = digits[*d++ & 0xf];
1691 if (zero == 0 || (*cp != '0')) {
1695 *cp = digits[*d >> 4];
1696 if (zero == 0 || (*cp != '0')) {
1700 *cp++ = digits[*d & 0xf];
1709 in6_localaddr(struct in6_addr *in6)
1711 struct rm_priotracker in6_ifa_tracker;
1712 struct in6_ifaddr *ia;
1714 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1717 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1718 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1719 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1720 &ia->ia_prefixmask.sin6_addr)) {
1721 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1725 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1731 * Return 1 if an internet address is for the local host and configured
1732 * on one of its interfaces.
1735 in6_localip(struct in6_addr *in6)
1737 struct rm_priotracker in6_ifa_tracker;
1738 struct in6_ifaddr *ia;
1740 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1741 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1742 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1743 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1747 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1752 * Return 1 if an internet address is configured on an interface.
1755 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1757 struct in6_addr in6;
1759 struct in6_ifaddr *ia6;
1764 if (in6_clearscope(&in6))
1766 in6_setscope(&in6, ifp, NULL);
1768 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1769 if (ifa->ifa_addr->sa_family != AF_INET6)
1771 ia6 = (struct in6_ifaddr *)ifa;
1772 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6))
1780 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1782 struct rm_priotracker in6_ifa_tracker;
1783 struct in6_ifaddr *ia;
1785 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1786 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1787 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1788 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1789 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1790 return (1); /* true */
1795 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1797 return (0); /* false */
1801 * return length of part which dst and src are equal
1805 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1808 u_char *s = (u_char *)src, *d = (u_char *)dst;
1809 u_char *lim = s + 16, r;
1812 if ((r = (*d++ ^ *s++)) != 0) {
1823 /* XXX: to be scope conscious */
1825 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1827 int bytelen, bitlen;
1830 if (0 > len || len > 128) {
1831 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1839 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1842 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1843 p2->s6_addr[bytelen] >> (8 - bitlen))
1850 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1852 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1853 int bytelen, bitlen, i;
1856 if (0 > len || len > 128) {
1857 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1862 bzero(maskp, sizeof(*maskp));
1865 for (i = 0; i < bytelen; i++)
1866 maskp->s6_addr[i] = 0xff;
1868 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1872 * return the best address out of the same scope. if no address was
1873 * found, return the first valid address from designated IF.
1876 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1878 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1880 struct in6_ifaddr *besta = NULL;
1881 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1885 dep[0] = dep[1] = NULL;
1888 * We first look for addresses in the same scope.
1889 * If there is one, return it.
1890 * If two or more, return one which matches the dst longest.
1891 * If none, return one of global addresses assigned other ifs.
1893 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1894 if (ifa->ifa_addr->sa_family != AF_INET6)
1896 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1897 continue; /* XXX: is there any case to allow anycast? */
1898 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1899 continue; /* don't use this interface */
1900 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1902 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1903 if (V_ip6_use_deprecated)
1904 dep[0] = (struct in6_ifaddr *)ifa;
1908 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1910 * call in6_matchlen() as few as possible
1914 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1915 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1918 besta = (struct in6_ifaddr *)ifa;
1921 besta = (struct in6_ifaddr *)ifa;
1927 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1928 if (ifa->ifa_addr->sa_family != AF_INET6)
1930 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1931 continue; /* XXX: is there any case to allow anycast? */
1932 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1933 continue; /* don't use this interface */
1934 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1936 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1937 if (V_ip6_use_deprecated)
1938 dep[1] = (struct in6_ifaddr *)ifa;
1942 return (struct in6_ifaddr *)ifa;
1945 /* use the last-resort values, that are, deprecated addresses */
1955 * perform DAD when interface becomes IFF_UP.
1958 in6_if_up(struct ifnet *ifp)
1960 struct epoch_tracker et;
1962 struct in6_ifaddr *ia;
1964 NET_EPOCH_ENTER(et);
1965 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1966 if (ifa->ifa_addr->sa_family != AF_INET6)
1968 ia = (struct in6_ifaddr *)ifa;
1969 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1971 * The TENTATIVE flag was likely set by hand
1972 * beforehand, implicitly indicating the need for DAD.
1973 * We may be able to skip the random delay in this
1974 * case, but we impose delays just in case.
1977 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1983 * special cases, like 6to4, are handled in in6_ifattach
1985 in6_ifattach(ifp, NULL);
1989 in6if_do_dad(struct ifnet *ifp)
1992 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1994 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1996 if ((ND_IFINFO(ifp)->flags &
1997 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0)
2003 * Calculate max IPv6 MTU through all the interfaces and store it
2009 struct epoch_tracker et;
2010 unsigned long maxmtu = 0;
2013 NET_EPOCH_ENTER(et);
2014 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2015 /* this function can be called during ifnet initialization */
2016 if (!ifp->if_afdata[AF_INET6])
2018 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2019 IN6_LINKMTU(ifp) > maxmtu)
2020 maxmtu = IN6_LINKMTU(ifp);
2023 if (maxmtu) /* update only when maxmtu is positive */
2024 V_in6_maxmtu = maxmtu;
2028 * Provide the length of interface identifiers to be used for the link attached
2029 * to the given interface. The length should be defined in "IPv6 over
2030 * xxx-link" document. Note that address architecture might also define
2031 * the length for a particular set of address prefixes, regardless of the
2032 * link type. As clarified in rfc2462bis, those two definitions should be
2033 * consistent, and those really are as of August 2004.
2036 in6_if2idlen(struct ifnet *ifp)
2038 switch (ifp->if_type) {
2039 case IFT_ETHER: /* RFC2464 */
2040 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2041 case IFT_L2VLAN: /* ditto */
2042 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
2043 case IFT_INFINIBAND:
2045 case IFT_PPP: /* RFC2472 */
2047 case IFT_FRELAY: /* RFC2590 */
2049 case IFT_IEEE1394: /* RFC3146 */
2052 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2054 return (64); /* XXX: is this really correct? */
2057 * Unknown link type:
2058 * It might be controversial to use the today's common constant
2059 * of 64 for these cases unconditionally. For full compliance,
2060 * we should return an error in this case. On the other hand,
2061 * if we simply miss the standard for the link type or a new
2062 * standard is defined for a new link type, the IFID length
2063 * is very likely to be the common constant. As a compromise,
2064 * we always use the constant, but make an explicit notice
2065 * indicating the "unknown" case.
2067 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2072 struct in6_llentry {
2073 struct llentry base;
2076 #define IN6_LLTBL_DEFAULT_HSIZE 32
2077 #define IN6_LLTBL_HASH(k, h) \
2078 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2081 * Do actual deallocation of @lle.
2084 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2086 struct llentry *lle;
2088 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2089 LLE_LOCK_DESTROY(lle);
2090 LLE_REQ_DESTROY(lle);
2091 free(lle, M_LLTABLE);
2095 * Called by LLE_FREE_LOCKED when number of references
2099 in6_lltable_destroy_lle(struct llentry *lle)
2103 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2106 static struct llentry *
2107 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2109 struct in6_llentry *lle;
2111 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2112 if (lle == NULL) /* NB: caller generates msg */
2115 lle->base.r_l3addr.addr6 = *addr6;
2116 lle->base.lle_refcnt = 1;
2117 lle->base.lle_free = in6_lltable_destroy_lle;
2118 LLE_LOCK_INIT(&lle->base);
2119 LLE_REQ_INIT(&lle->base);
2120 callout_init(&lle->base.lle_timer, 1);
2122 return (&lle->base);
2126 in6_lltable_match_prefix(const struct sockaddr *saddr,
2127 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2129 const struct in6_addr *addr, *mask, *lle_addr;
2131 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2132 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2133 lle_addr = &lle->r_l3addr.addr6;
2135 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2138 if (lle->la_flags & LLE_IFADDR) {
2140 * Delete LLE_IFADDR records IFF address & flag matches.
2141 * Note that addr is the interface address within prefix
2144 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2145 (flags & LLE_STATIC) != 0)
2150 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2151 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2158 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2162 LLE_WLOCK_ASSERT(lle);
2163 KASSERT(llt != NULL, ("lltable is NULL"));
2165 /* Unlink entry from table */
2166 if ((lle->la_flags & LLE_LINKED) != 0) {
2168 IF_AFDATA_WLOCK_ASSERT(ifp);
2169 lltable_unlink_entry(llt, lle);
2176 in6_lltable_rtcheck(struct ifnet *ifp,
2178 const struct sockaddr *l3addr)
2180 const struct sockaddr_in6 *sin6;
2181 struct nhop_object *nh;
2182 struct in6_addr dst;
2184 char ip6buf[INET6_ADDRSTRLEN];
2188 KASSERT(l3addr->sa_family == AF_INET6,
2189 ("sin_family %d", l3addr->sa_family));
2191 sin6 = (const struct sockaddr_in6 *)l3addr;
2192 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2193 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2194 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0);
2195 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) {
2198 * Create an ND6 cache for an IPv6 neighbor
2199 * that is not covered by our own prefix.
2201 ifa = ifaof_ifpforaddr(l3addr, ifp);
2205 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2206 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2213 * Called by the datapath to indicate that the entry was used.
2216 in6_lltable_mark_used(struct llentry *lle)
2220 lle->r_skip_req = 0;
2223 * Set the hit time so the callback function
2224 * can determine the remaining time before
2225 * transiting to the DELAY state.
2227 lle->lle_hittime = time_uptime;
2228 LLE_REQ_UNLOCK(lle);
2231 static inline uint32_t
2232 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2235 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2239 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2242 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2246 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2248 struct sockaddr_in6 *sin6;
2250 sin6 = (struct sockaddr_in6 *)sa;
2251 bzero(sin6, sizeof(*sin6));
2252 sin6->sin6_family = AF_INET6;
2253 sin6->sin6_len = sizeof(*sin6);
2254 sin6->sin6_addr = lle->r_l3addr.addr6;
2257 static inline struct llentry *
2258 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2260 struct llentry *lle;
2261 struct llentries *lleh;
2264 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2265 lleh = &llt->lle_head[hashidx];
2266 CK_LIST_FOREACH(lle, lleh, lle_next) {
2267 if (lle->la_flags & LLE_DELETED)
2269 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2277 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2280 lle->la_flags |= LLE_DELETED;
2281 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2283 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2288 static struct llentry *
2289 in6_lltable_alloc(struct lltable *llt, u_int flags,
2290 const struct sockaddr *l3addr)
2292 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2293 struct ifnet *ifp = llt->llt_ifp;
2294 struct llentry *lle;
2295 char linkhdr[LLE_MAX_LINKHDR];
2299 KASSERT(l3addr->sa_family == AF_INET6,
2300 ("sin_family %d", l3addr->sa_family));
2303 * A route that covers the given address must have
2304 * been installed 1st because we are doing a resolution,
2307 if (!(flags & LLE_IFADDR) &&
2308 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2311 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2313 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2316 lle->la_flags = flags;
2317 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2318 linkhdrsize = LLE_MAX_LINKHDR;
2319 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2320 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2321 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2324 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2326 lle->la_flags |= LLE_STATIC;
2329 if ((lle->la_flags & LLE_STATIC) != 0)
2330 lle->ln_state = ND6_LLINFO_REACHABLE;
2335 static struct llentry *
2336 in6_lltable_lookup(struct lltable *llt, u_int flags,
2337 const struct sockaddr *l3addr)
2339 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2340 struct llentry *lle;
2342 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2343 KASSERT(l3addr->sa_family == AF_INET6,
2344 ("sin_family %d", l3addr->sa_family));
2345 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2346 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2347 ("wrong lle request flags: %#x", flags));
2349 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2352 if (flags & LLE_UNLOCKED)
2355 if (flags & LLE_EXCLUSIVE)
2361 * If the afdata lock is not held, the LLE may have been unlinked while
2362 * we were blocked on the LLE lock. Check for this case.
2364 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2365 if (flags & LLE_EXCLUSIVE)
2375 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2376 struct sysctl_req *wr)
2378 struct ifnet *ifp = llt->llt_ifp;
2381 struct rt_msghdr rtm;
2382 struct sockaddr_in6 sin6;
2384 * ndp.c assumes that sdl is word aligned
2389 struct sockaddr_dl sdl;
2391 struct sockaddr_dl *sdl;
2394 bzero(&ndpc, sizeof(ndpc));
2395 /* skip deleted entries */
2396 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2398 /* Skip if jailed and not a valid IP of the prison. */
2399 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2400 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2403 * produce a msg made of:
2405 * struct sockaddr_in6 (IPv6)
2406 * struct sockaddr_dl;
2408 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2409 ndpc.rtm.rtm_version = RTM_VERSION;
2410 ndpc.rtm.rtm_type = RTM_GET;
2411 ndpc.rtm.rtm_flags = RTF_UP;
2412 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2413 sa6_recoverscope(&ndpc.sin6);
2416 if (lle->la_flags & LLE_PUB)
2417 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2420 sdl->sdl_family = AF_LINK;
2421 sdl->sdl_len = sizeof(*sdl);
2422 sdl->sdl_index = ifp->if_index;
2423 sdl->sdl_type = ifp->if_type;
2424 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2425 sdl->sdl_alen = ifp->if_addrlen;
2426 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2429 bzero(LLADDR(sdl), ifp->if_addrlen);
2431 if (lle->la_expire != 0)
2432 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2433 lle->lle_remtime / hz + time_second - time_uptime;
2434 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2435 if (lle->la_flags & LLE_STATIC)
2436 ndpc.rtm.rtm_flags |= RTF_STATIC;
2437 if (lle->la_flags & LLE_IFADDR)
2438 ndpc.rtm.rtm_flags |= RTF_PINNED;
2439 if (lle->ln_router != 0)
2440 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2441 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2442 /* Store state in rmx_weight value */
2443 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2444 ndpc.rtm.rtm_index = ifp->if_index;
2445 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2450 static struct lltable *
2451 in6_lltattach(struct ifnet *ifp)
2453 struct lltable *llt;
2455 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2456 llt->llt_af = AF_INET6;
2459 llt->llt_lookup = in6_lltable_lookup;
2460 llt->llt_alloc_entry = in6_lltable_alloc;
2461 llt->llt_delete_entry = in6_lltable_delete_entry;
2462 llt->llt_dump_entry = in6_lltable_dump_entry;
2463 llt->llt_hash = in6_lltable_hash;
2464 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2465 llt->llt_free_entry = in6_lltable_free_entry;
2466 llt->llt_match_prefix = in6_lltable_match_prefix;
2467 llt->llt_mark_used = in6_lltable_mark_used;
2474 in6_domifattach(struct ifnet *ifp)
2476 struct in6_ifextra *ext;
2478 /* There are not IPv6-capable interfaces. */
2479 switch (ifp->if_type) {
2485 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2486 bzero(ext, sizeof(*ext));
2488 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2489 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2490 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2491 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2493 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2494 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2496 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2497 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2499 ext->nd_ifinfo = nd6_ifattach(ifp);
2500 ext->scope6_id = scope6_ifattach(ifp);
2501 ext->lltable = in6_lltattach(ifp);
2503 ext->mld_ifinfo = mld_domifattach(ifp);
2509 in6_domifmtu(struct ifnet *ifp)
2511 if (ifp->if_afdata[AF_INET6] == NULL)
2514 return (IN6_LINKMTU(ifp));
2518 in6_domifdetach(struct ifnet *ifp, void *aux)
2520 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2522 mld_domifdetach(ifp);
2523 scope6_ifdetach(ext->scope6_id);
2524 nd6_ifdetach(ifp, ext->nd_ifinfo);
2525 lltable_free(ext->lltable);
2526 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2527 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2528 free(ext->in6_ifstat, M_IFADDR);
2529 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2530 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2531 free(ext->icmp6_ifstat, M_IFADDR);
2532 free(ext, M_IFADDR);
2536 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2537 * v4 mapped addr or v4 compat addr
2540 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2543 bzero(sin, sizeof(*sin));
2544 sin->sin_len = sizeof(struct sockaddr_in);
2545 sin->sin_family = AF_INET;
2546 sin->sin_port = sin6->sin6_port;
2547 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2550 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2552 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2554 bzero(sin6, sizeof(*sin6));
2555 sin6->sin6_len = sizeof(struct sockaddr_in6);
2556 sin6->sin6_family = AF_INET6;
2557 sin6->sin6_port = sin->sin_port;
2558 sin6->sin6_addr.s6_addr32[0] = 0;
2559 sin6->sin6_addr.s6_addr32[1] = 0;
2560 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2561 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2564 /* Convert sockaddr_in6 into sockaddr_in. */
2566 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2568 struct sockaddr_in *sin_p;
2569 struct sockaddr_in6 sin6;
2572 * Save original sockaddr_in6 addr and convert it
2575 sin6 = *(struct sockaddr_in6 *)nam;
2576 sin_p = (struct sockaddr_in *)nam;
2577 in6_sin6_2_sin(sin_p, &sin6);
2580 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2582 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2584 struct sockaddr_in *sin_p;
2585 struct sockaddr_in6 *sin6_p;
2587 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2588 sin_p = (struct sockaddr_in *)*nam;
2589 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2590 free(*nam, M_SONAME);
2591 *nam = (struct sockaddr *)sin6_p;