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/nhop.h>
95 #include <net/if_dl.h>
98 #include <netinet/in.h>
99 #include <netinet/in_var.h>
100 #include <net/if_llatbl.h>
101 #include <netinet/if_ether.h>
102 #include <netinet/in_systm.h>
103 #include <netinet/ip.h>
104 #include <netinet/in_pcb.h>
105 #include <netinet/ip_carp.h>
107 #include <netinet/ip6.h>
108 #include <netinet6/ip6_var.h>
109 #include <netinet6/nd6.h>
110 #include <netinet6/mld6_var.h>
111 #include <netinet6/ip6_mroute.h>
112 #include <netinet6/in6_ifattach.h>
113 #include <netinet6/scope6_var.h>
114 #include <netinet6/in6_fib.h>
115 #include <netinet6/in6_pcb.h>
118 * struct in6_ifreq and struct ifreq must be type punnable for common members
119 * of ifr_ifru to allow accessors to be shared.
121 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
122 offsetof(struct ifreq, ifr_ifru),
123 "struct in6_ifreq and struct ifreq are not type punnable");
125 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
126 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
129 * Definitions of some costant IP6 addresses.
131 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
132 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
133 const struct in6_addr in6addr_nodelocal_allnodes =
134 IN6ADDR_NODELOCAL_ALLNODES_INIT;
135 const struct in6_addr in6addr_linklocal_allnodes =
136 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
137 const struct in6_addr in6addr_linklocal_allrouters =
138 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
139 const struct in6_addr in6addr_linklocal_allv2routers =
140 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
142 const struct in6_addr in6mask0 = IN6MASK0;
143 const struct in6_addr in6mask32 = IN6MASK32;
144 const struct in6_addr in6mask64 = IN6MASK64;
145 const struct in6_addr in6mask96 = IN6MASK96;
146 const struct in6_addr in6mask128 = IN6MASK128;
148 const struct sockaddr_in6 sa6_any =
149 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
151 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
152 struct in6_aliasreq *, int);
153 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
155 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
156 struct in6_ifaddr *, int);
157 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
158 struct in6_aliasreq *, int flags);
159 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
160 struct in6_ifaddr *, int, int);
161 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
162 struct in6_ifaddr *, int);
164 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
165 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
168 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
170 struct rt_addrinfo info;
172 struct sockaddr_dl gateway;
178 * Prepare info data for the host route.
179 * This code mimics one from ifa_maintain_loopback_route().
181 bzero(&info, sizeof(struct rt_addrinfo));
182 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
183 info.rti_info[RTAX_DST] = ifa->ifa_addr;
184 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway;
185 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type);
186 if (cmd != RTM_DELETE)
187 info.rti_ifp = V_loif;
189 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib;
191 if (cmd == RTM_ADD) {
192 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
193 rt_routemsg_info(cmd, &info, fibnum);
194 } else if (cmd == RTM_DELETE) {
195 rt_routemsg_info(cmd, &info, fibnum);
196 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
201 in6_mask2len(struct in6_addr *mask, u_char *lim0)
204 u_char *lim = lim0, *p;
206 /* ignore the scope_id part */
207 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
208 lim = (u_char *)mask + sizeof(*mask);
209 for (p = (u_char *)mask; p < lim; x++, p++) {
215 for (y = 0; y < 8; y++) {
216 if ((*p & (0x80 >> y)) == 0)
222 * when the limit pointer is given, do a stricter check on the
226 if (y != 0 && (*p & (0x00ff >> y)) != 0)
228 for (p = p + 1; p < lim; p++)
236 #ifdef COMPAT_FREEBSD32
237 struct in6_ndifreq32 {
238 char ifname[IFNAMSIZ];
241 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
245 in6_control(struct socket *so, u_long cmd, caddr_t data,
246 struct ifnet *ifp, struct thread *td)
248 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
249 struct in6_ifaddr *ia = NULL;
250 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
251 struct sockaddr_in6 *sa6;
252 int carp_attached = 0;
257 * Compat to make pre-10.x ifconfig(8) operable.
259 if (cmd == OSIOCAIFADDR_IN6)
260 cmd = SIOCAIFADDR_IN6;
263 case SIOCGETSGCNT_IN6:
264 case SIOCGETMIFCNT_IN6:
266 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
267 * We cannot see how that would be needed, so do not adjust the
268 * KPI blindly; more likely should clean up the IPv4 variant.
270 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
274 case SIOCAADDRCTL_POLICY:
275 case SIOCDADDRCTL_POLICY:
277 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
281 return (in6_src_ioctl(cmd, data));
288 case SIOCSNDFLUSH_IN6:
289 case SIOCSPFXFLUSH_IN6:
290 case SIOCSRTRFLUSH_IN6:
291 case SIOCSDEFIFACE_IN6:
292 case SIOCSIFINFO_FLAGS:
293 case SIOCSIFINFO_IN6:
295 error = priv_check(td, PRIV_NETINET_ND6);
300 case OSIOCGIFINFO_IN6:
301 case SIOCGIFINFO_IN6:
302 case SIOCGNBRINFO_IN6:
303 case SIOCGDEFIFACE_IN6:
304 return (nd6_ioctl(cmd, data, ifp));
306 #ifdef COMPAT_FREEBSD32
307 case SIOCGDEFIFACE32_IN6:
309 struct in6_ndifreq ndif;
310 struct in6_ndifreq32 *ndif32;
312 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
316 ndif32 = (struct in6_ndifreq32 *)data;
317 ndif32->ifindex = ndif.ifindex;
324 case SIOCSIFPREFIX_IN6:
325 case SIOCDIFPREFIX_IN6:
326 case SIOCAIFPREFIX_IN6:
327 case SIOCCIFPREFIX_IN6:
328 case SIOCSGIFPREFIX_IN6:
329 case SIOCGIFPREFIX_IN6:
331 "prefix ioctls are now invalidated. "
332 "please use ifconfig.\n");
339 error = priv_check(td, PRIV_NETINET_SCOPE6);
346 return (scope6_ioctl(cmd, data, ifp));
350 * Find address for this interface, if it exists.
352 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
353 * only, and used the first interface address as the target of other
354 * operations (without checking ifra_addr). This was because netinet
355 * code/API assumed at most 1 interface address per interface.
356 * Since IPv6 allows a node to assign multiple addresses
357 * on a single interface, we almost always look and check the
358 * presence of ifra_addr, and reject invalid ones here.
359 * It also decreases duplicated code among SIOC*_IN6 operations.
362 case SIOCAIFADDR_IN6:
363 case SIOCSIFPHYADDR_IN6:
364 sa6 = &ifra->ifra_addr;
366 case SIOCSIFADDR_IN6:
367 case SIOCGIFADDR_IN6:
368 case SIOCSIFDSTADDR_IN6:
369 case SIOCSIFNETMASK_IN6:
370 case SIOCGIFDSTADDR_IN6:
371 case SIOCGIFNETMASK_IN6:
372 case SIOCDIFADDR_IN6:
373 case SIOCGIFPSRCADDR_IN6:
374 case SIOCGIFPDSTADDR_IN6:
375 case SIOCGIFAFLAG_IN6:
376 case SIOCSNDFLUSH_IN6:
377 case SIOCSPFXFLUSH_IN6:
378 case SIOCSRTRFLUSH_IN6:
379 case SIOCGIFALIFETIME_IN6:
380 case SIOCGIFSTAT_IN6:
381 case SIOCGIFSTAT_ICMP6:
382 sa6 = &ifr->ifr_addr;
389 * Although we should pass any non-INET6 ioctl requests
390 * down to driver, we filter some legacy INET requests.
391 * Drivers trust SIOCSIFADDR et al to come from an already
392 * privileged layer, and do not perform any credentials
393 * checks or input validation.
400 if (sa6 && sa6->sin6_family == AF_INET6) {
401 if (sa6->sin6_scope_id != 0)
402 error = sa6_embedscope(sa6, 0);
404 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
407 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
408 &sa6->sin6_addr)) != 0)
410 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
415 case SIOCSIFADDR_IN6:
416 case SIOCSIFDSTADDR_IN6:
417 case SIOCSIFNETMASK_IN6:
419 * Since IPv6 allows a node to assign multiple addresses
420 * on a single interface, SIOCSIFxxx ioctls are deprecated.
422 /* we decided to obsolete this command (20000704) */
426 case SIOCDIFADDR_IN6:
428 * for IPv4, we look for existing in_ifaddr here to allow
429 * "ifconfig if0 delete" to remove the first IPv4 address on
430 * the interface. For IPv6, as the spec allows multiple
431 * interface address from the day one, we consider "remove the
432 * first one" semantics to be not preferable.
435 error = EADDRNOTAVAIL;
439 case SIOCAIFADDR_IN6:
441 * We always require users to specify a valid IPv6 address for
442 * the corresponding operation.
444 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
445 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
446 error = EAFNOSUPPORT;
451 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
452 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
457 case SIOCGIFSTAT_IN6:
458 case SIOCGIFSTAT_ICMP6:
459 if (ifp->if_afdata[AF_INET6] == NULL) {
460 error = EPFNOSUPPORT;
465 case SIOCGIFADDR_IN6:
466 /* This interface is basically deprecated. use SIOCGIFCONF. */
468 case SIOCGIFAFLAG_IN6:
469 case SIOCGIFNETMASK_IN6:
470 case SIOCGIFDSTADDR_IN6:
471 case SIOCGIFALIFETIME_IN6:
472 /* must think again about its semantics */
474 error = EADDRNOTAVAIL;
481 case SIOCGIFADDR_IN6:
482 ifr->ifr_addr = ia->ia_addr;
483 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
487 case SIOCGIFDSTADDR_IN6:
488 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
492 ifr->ifr_dstaddr = ia->ia_dstaddr;
493 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
497 case SIOCGIFNETMASK_IN6:
498 ifr->ifr_addr = ia->ia_prefixmask;
501 case SIOCGIFAFLAG_IN6:
502 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
505 case SIOCGIFSTAT_IN6:
506 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
507 ifp->if_afdata[AF_INET6])->in6_ifstat,
508 &ifr->ifr_ifru.ifru_stat,
509 sizeof(struct in6_ifstat) / sizeof(uint64_t));
512 case SIOCGIFSTAT_ICMP6:
513 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
514 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
515 &ifr->ifr_ifru.ifru_icmp6stat,
516 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
519 case SIOCGIFALIFETIME_IN6:
520 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
521 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
523 struct in6_addrlifetime *retlt =
524 &ifr->ifr_ifru.ifru_lifetime;
527 * XXX: adjust expiration time assuming time_t is
531 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
532 if (ia->ia6_lifetime.ia6t_vltime <
533 maxexpire - ia->ia6_updatetime) {
534 retlt->ia6t_expire = ia->ia6_updatetime +
535 ia->ia6_lifetime.ia6t_vltime;
537 retlt->ia6t_expire = maxexpire;
539 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
541 struct in6_addrlifetime *retlt =
542 &ifr->ifr_ifru.ifru_lifetime;
545 * XXX: adjust expiration time assuming time_t is
549 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
550 if (ia->ia6_lifetime.ia6t_pltime <
551 maxexpire - ia->ia6_updatetime) {
552 retlt->ia6t_preferred = ia->ia6_updatetime +
553 ia->ia6_lifetime.ia6t_pltime;
555 retlt->ia6t_preferred = maxexpire;
559 case SIOCAIFADDR_IN6:
561 struct nd_prefixctl pr0;
562 struct nd_prefix *pr;
565 * first, make or update the interface address structure,
566 * and link it to the list.
568 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
571 if (ia->ia_ifa.ifa_carp)
572 (*carp_detach_p)(&ia->ia_ifa, true);
573 ifa_free(&ia->ia_ifa);
575 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
578 * this can happen when the user specify the 0 valid
584 if (cmd == ocmd && ifra->ifra_vhid > 0) {
585 if (carp_attach_p != NULL)
586 error = (*carp_attach_p)(&ia->ia_ifa,
589 error = EPROTONOSUPPORT;
597 * then, make the prefix on-link on the interface.
598 * XXX: we'd rather create the prefix before the address, but
599 * we need at least one address to install the corresponding
600 * interface route, so we configure the address first.
604 * convert mask to prefix length (prefixmask has already
605 * been validated in in6_update_ifa().
607 bzero(&pr0, sizeof(pr0));
609 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
611 if (pr0.ndpr_plen == 128) {
612 /* we don't need to install a host route. */
615 pr0.ndpr_prefix = ifra->ifra_addr;
616 /* apply the mask for safety. */
617 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
618 &ifra->ifra_prefixmask.sin6_addr);
621 * XXX: since we don't have an API to set prefix (not address)
622 * lifetimes, we just use the same lifetimes as addresses.
623 * The (temporarily) installed lifetimes can be overridden by
624 * later advertised RAs (when accept_rtadv is non 0), which is
625 * an intended behavior.
627 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
629 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
630 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
631 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
633 /* add the prefix if not yet. */
634 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
636 * nd6_prelist_add will install the corresponding
639 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
641 (*carp_detach_p)(&ia->ia_ifa, false);
646 /* relate the address to the prefix */
647 if (ia->ia6_ndpr == NULL) {
652 * If this is the first autoconf address from the
653 * prefix, create a temporary address as well
656 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
657 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
659 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
660 log(LOG_NOTICE, "in6_control: failed "
661 "to create a temporary address, "
669 * this might affect the status of autoconfigured addresses,
670 * that is, this address might make other addresses detached.
672 pfxlist_onlink_check();
676 * Try to clear the flag when a new IPv6 address is added
677 * onto an IFDISABLED interface and it succeeds.
679 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
680 struct in6_ndireq nd;
682 memset(&nd, 0, sizeof(nd));
683 nd.ndi.flags = ND_IFINFO(ifp)->flags;
684 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
685 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
686 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
687 "SIOCSIFINFO_FLAGS for -ifdisabled "
690 * Ignore failure of clearing the flag intentionally.
691 * The failure means address duplication was detected.
697 case SIOCDIFADDR_IN6:
699 struct nd_prefix *pr;
702 * If the address being deleted is the only one that owns
703 * the corresponding prefix, expire the prefix as well.
704 * XXX: theoretically, we don't have to worry about such
705 * relationship, since we separate the address management
706 * and the prefix management. We do this, however, to provide
707 * as much backward compatibility as possible in terms of
708 * the ioctl operation.
709 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
712 in6_purgeaddr(&ia->ia_ifa);
713 if (pr != NULL && pr->ndpr_addrcnt == 0) {
715 nd6_prefix_unlink(pr, NULL);
719 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
725 if (ifp->if_ioctl == NULL) {
729 error = (*ifp->if_ioctl)(ifp, cmd, data);
736 ifa_free(&ia->ia_ifa);
740 static struct in6_multi_mship *
741 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
742 int *errorp, int delay)
744 struct in6_multi_mship *imm;
747 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
753 delay = (delay * PR_FASTHZ) / hz;
755 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
758 free(imm, M_IP6MADDR);
765 * Join necessary multicast groups. Factored out from in6_update_ifa().
766 * This entire work should only be done once, for the default FIB.
769 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
770 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
772 char ip6buf[INET6_ADDRSTRLEN];
773 struct in6_addr mltaddr;
774 struct in6_multi_mship *imm;
777 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
779 /* Join solicited multicast addr for new host id. */
780 bzero(&mltaddr, sizeof(struct in6_addr));
781 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
782 mltaddr.s6_addr32[2] = htonl(1);
783 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
784 mltaddr.s6_addr8[12] = 0xff;
785 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
786 /* XXX: should not happen */
787 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
791 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
793 * We need a random delay for DAD on the address being
794 * configured. It also means delaying transmission of the
795 * corresponding MLD report to avoid report collision.
796 * [RFC 4861, Section 6.3.7]
798 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
800 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
802 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
803 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
804 if_name(ifp), error));
807 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
808 *in6m_sol = imm->i6mm_maddr;
811 * Join link-local all-nodes address.
813 mltaddr = in6addr_linklocal_allnodes;
814 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
815 goto cleanup; /* XXX: should not fail */
817 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
819 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
820 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
821 if_name(ifp), error));
824 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
827 * Join node information group address.
830 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
832 * The spec does not say anything about delay for this group,
833 * but the same logic should apply.
835 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
837 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
839 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
842 "%s: in6_joingroup failed for %s on %s "
843 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
844 &mltaddr), if_name(ifp), error));
845 /* XXX not very fatal, go on... */
847 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
849 if (V_icmp6_nodeinfo_oldmcprefix &&
850 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
851 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
854 "%s: in6_joingroup failed for %s on %s "
855 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
856 &mltaddr), if_name(ifp), error));
857 /* XXX not very fatal, go on... */
859 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
863 * Join interface-local all-nodes address.
864 * (ff01::1%ifN, and ff01::%ifN/32)
866 mltaddr = in6addr_nodelocal_allnodes;
867 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
868 goto cleanup; /* XXX: should not fail */
870 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
872 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
873 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
874 &mltaddr), if_name(ifp), error));
877 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
884 * Update parameters of an IPv6 interface address.
885 * If necessary, a new entry is created and linked into address chains.
886 * This function is separated from in6_control().
889 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
890 struct in6_ifaddr *ia, int flags)
892 int error, hostIsNew = 0;
894 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
899 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
903 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
905 if (hostIsNew != 0) {
906 in6_unlink_ifa(ia, ifp);
907 ifa_free(&ia->ia_ifa);
913 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
919 * Fill in basic IPv6 address request info.
922 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
923 const struct in6_addr *mask)
926 memset(ifra, 0, sizeof(struct in6_aliasreq));
928 ifra->ifra_addr.sin6_family = AF_INET6;
929 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
931 ifra->ifra_addr.sin6_addr = *addr;
933 ifra->ifra_prefixmask.sin6_family = AF_INET6;
934 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
936 ifra->ifra_prefixmask.sin6_addr = *mask;
940 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
941 struct in6_ifaddr *ia, int flags)
944 struct sockaddr_in6 dst6;
945 struct in6_addrlifetime *lt;
946 char ip6buf[INET6_ADDRSTRLEN];
948 /* Validate parameters */
949 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
953 * The destination address for a p2p link must have a family
954 * of AF_UNSPEC or AF_INET6.
956 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
957 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
958 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
959 return (EAFNOSUPPORT);
964 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
965 ifra->ifra_addr.sin6_family != AF_INET6)
969 * validate ifra_prefixmask. don't check sin6_family, netmask
970 * does not carry fields other than sin6_len.
972 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
975 * Because the IPv6 address architecture is classless, we require
976 * users to specify a (non 0) prefix length (mask) for a new address.
977 * We also require the prefix (when specified) mask is valid, and thus
978 * reject a non-consecutive mask.
980 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
982 if (ifra->ifra_prefixmask.sin6_len != 0) {
983 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
984 (u_char *)&ifra->ifra_prefixmask +
985 ifra->ifra_prefixmask.sin6_len);
990 * In this case, ia must not be NULL. We just use its prefix
993 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
996 * If the destination address on a p2p interface is specified,
997 * and the address is a scoped one, validate/set the scope
1000 dst6 = ifra->ifra_dstaddr;
1001 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1002 (dst6.sin6_family == AF_INET6)) {
1003 struct in6_addr in6_tmp;
1006 in6_tmp = dst6.sin6_addr;
1007 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1008 return (EINVAL); /* XXX: should be impossible */
1010 if (dst6.sin6_scope_id != 0) {
1011 if (dst6.sin6_scope_id != zoneid)
1013 } else /* user omit to specify the ID. */
1014 dst6.sin6_scope_id = zoneid;
1016 /* convert into the internal form */
1017 if (sa6_embedscope(&dst6, 0))
1018 return (EINVAL); /* XXX: should be impossible */
1020 /* Modify original ifra_dstaddr to reflect changes */
1021 ifra->ifra_dstaddr = dst6;
1024 * The destination address can be specified only for a p2p or a
1025 * loopback interface. If specified, the corresponding prefix length
1028 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1029 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1030 /* XXX: noisy message */
1031 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1032 "be specified for a p2p or a loopback IF only\n"));
1036 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1037 "be 128 when dstaddr is specified\n"));
1041 /* lifetime consistency check */
1042 lt = &ifra->ifra_lifetime;
1043 if (lt->ia6t_pltime > lt->ia6t_vltime)
1045 if (lt->ia6t_vltime == 0) {
1047 * the following log might be noisy, but this is a typical
1048 * configuration mistake or a tool's bug.
1051 "in6_update_ifa: valid lifetime is 0 for %s\n",
1052 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1055 return (0); /* there's nothing to do */
1058 /* Check prefix mask */
1059 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1061 * We prohibit changing the prefix length of an existing
1063 * + such an operation should be rare in IPv6, and
1064 * + the operation would confuse prefix management.
1066 if (ia->ia_prefixmask.sin6_len != 0 &&
1067 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1068 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1069 "of an existing %s address should not be changed\n",
1070 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1080 * Allocate a new ifaddr and link it into chains.
1082 static struct in6_ifaddr *
1083 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1085 struct in6_ifaddr *ia;
1088 * When in6_alloc_ifa() is called in a process of a received
1089 * RA, it is called under an interrupt context. So, we should
1090 * call malloc with M_NOWAIT.
1092 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1095 LIST_INIT(&ia->ia6_memberships);
1096 /* Initialize the address and masks, and put time stamp */
1097 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1098 ia->ia_addr.sin6_family = AF_INET6;
1099 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1100 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1101 ia->ia_addr = ifra->ifra_addr;
1102 ia->ia6_createtime = time_uptime;
1103 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1105 * Some functions expect that ifa_dstaddr is not
1106 * NULL for p2p interfaces.
1108 ia->ia_ifa.ifa_dstaddr =
1109 (struct sockaddr *)&ia->ia_dstaddr;
1111 ia->ia_ifa.ifa_dstaddr = NULL;
1114 /* set prefix mask if any */
1115 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1116 if (ifra->ifra_prefixmask.sin6_len != 0) {
1117 ia->ia_prefixmask.sin6_family = AF_INET6;
1118 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1119 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1123 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1125 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1126 IF_ADDR_WUNLOCK(ifp);
1128 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1130 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1131 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1132 IN6_IFADDR_WUNLOCK();
1138 * Update/configure interface address parameters:
1140 * 1) Update lifetime
1141 * 2) Update interface metric ad flags
1142 * 3) Notify other subsystems
1145 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1146 struct in6_ifaddr *ia, int hostIsNew, int flags)
1150 /* update timestamp */
1151 ia->ia6_updatetime = time_uptime;
1154 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1155 * to see if the address is deprecated or invalidated, but initialize
1156 * these members for applications.
1158 ia->ia6_lifetime = ifra->ifra_lifetime;
1159 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1160 ia->ia6_lifetime.ia6t_expire =
1161 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1163 ia->ia6_lifetime.ia6t_expire = 0;
1164 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1165 ia->ia6_lifetime.ia6t_preferred =
1166 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1168 ia->ia6_lifetime.ia6t_preferred = 0;
1171 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1172 * userland, make it deprecated.
1174 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1175 ia->ia6_lifetime.ia6t_pltime = 0;
1176 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1180 * configure address flags.
1182 ia->ia6_flags = ifra->ifra_flags;
1185 * Make the address tentative before joining multicast addresses,
1186 * so that corresponding MLD responses would not have a tentative
1189 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1192 * DAD should be performed for an new address or addresses on
1193 * an interface with ND6_IFF_IFDISABLED.
1195 if (in6if_do_dad(ifp) &&
1196 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1197 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1199 /* notify other subsystems */
1200 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1206 * Do link-level ifa job:
1207 * 1) Add lle entry for added address
1208 * 2) Notifies routing socket users about new address
1209 * 3) join appropriate multicast group
1210 * 4) start DAD if enabled
1213 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1214 struct in6_ifaddr *ia, int flags)
1216 struct in6_multi *in6m_sol;
1219 /* Add local address to lltable, if necessary (ex. on p2p link). */
1220 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1221 in6_purgeaddr(&ia->ia_ifa);
1222 ifa_free(&ia->ia_ifa);
1226 /* Join necessary multicast groups. */
1228 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1229 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1231 in6_purgeaddr(&ia->ia_ifa);
1232 ifa_free(&ia->ia_ifa);
1237 /* Perform DAD, if the address is TENTATIVE. */
1238 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1239 int delay, mindelay, maxdelay;
1242 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1244 * We need to impose a delay before sending an NS
1245 * for DAD. Check if we also needed a delay for the
1246 * corresponding MLD message. If we did, the delay
1247 * should be larger than the MLD delay (this could be
1248 * relaxed a bit, but this simple logic is at least
1250 * XXX: Break data hiding guidelines and look at
1251 * state for the solicited multicast group.
1254 if (in6m_sol != NULL &&
1255 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1256 mindelay = in6m_sol->in6m_timer;
1258 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1259 if (maxdelay - mindelay == 0)
1263 (arc4random() % (maxdelay - mindelay)) +
1267 nd6_dad_start((struct ifaddr *)ia, delay);
1270 in6_newaddrmsg(ia, RTM_ADD);
1271 ifa_free(&ia->ia_ifa);
1276 in6_purgeaddr(struct ifaddr *ifa)
1278 struct ifnet *ifp = ifa->ifa_ifp;
1279 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1280 struct in6_multi_mship *imm;
1284 (*carp_detach_p)(ifa, false);
1287 * Remove the loopback route to the interface address.
1288 * The check for the current setting of "nd6_useloopback"
1291 if (ia->ia_flags & IFA_RTSELF) {
1292 error = ifa_del_loopback_route((struct ifaddr *)ia,
1293 (struct sockaddr *)&ia->ia_addr);
1295 ia->ia_flags &= ~IFA_RTSELF;
1298 /* stop DAD processing */
1301 /* Leave multicast groups. */
1302 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1303 LIST_REMOVE(imm, i6mm_chain);
1304 if (imm->i6mm_maddr != NULL)
1305 in6_leavegroup(imm->i6mm_maddr, NULL);
1306 free(imm, M_IP6MADDR);
1308 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1309 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1310 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1311 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1313 log(LOG_INFO, "%s: err=%d, destination address delete "
1314 "failed\n", __func__, error);
1315 ia->ia_flags &= ~IFA_ROUTE;
1318 in6_newaddrmsg(ia, RTM_DELETE);
1319 in6_unlink_ifa(ia, ifp);
1323 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1325 char ip6buf[INET6_ADDRSTRLEN];
1329 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1330 IF_ADDR_WUNLOCK(ifp);
1331 ifa_free(&ia->ia_ifa); /* if_addrhead */
1334 * Defer the release of what might be the last reference to the
1335 * in6_ifaddr so that it can't be freed before the remainder of the
1339 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1340 CK_LIST_REMOVE(ia, ia6_hash);
1341 IN6_IFADDR_WUNLOCK();
1344 * Release the reference to the base prefix. There should be a
1345 * positive reference.
1348 if (ia->ia6_ndpr == NULL) {
1350 "in6_unlink_ifa: autoconf'ed address "
1351 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1353 ia->ia6_ndpr->ndpr_addrcnt--;
1354 /* Do not delete lles within prefix if refcont != 0 */
1355 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1357 ia->ia6_ndpr = NULL;
1360 nd6_rem_ifa_lle(ia, remove_lle);
1363 * Also, if the address being removed is autoconf'ed, call
1364 * pfxlist_onlink_check() since the release might affect the status of
1365 * other (detached) addresses.
1367 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1368 pfxlist_onlink_check();
1370 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1374 * Notifies other subsystems about address change/arrival:
1375 * 1) Notifies device handler on the first IPv6 address assignment
1376 * 2) Handle routing table changes for P2P links and route
1377 * 3) Handle routing table changes for address host route
1380 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1381 struct in6_aliasreq *ifra, int hostIsNew)
1383 int error = 0, plen, ifacount = 0;
1385 struct sockaddr_in6 *pdst;
1386 char ip6buf[INET6_ADDRSTRLEN];
1389 * Give the interface a chance to initialize
1390 * if this is its first address,
1392 if (hostIsNew != 0) {
1393 struct epoch_tracker et;
1395 NET_EPOCH_ENTER(et);
1396 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1397 if (ifa->ifa_addr->sa_family != AF_INET6)
1404 if (ifacount <= 1 && ifp->if_ioctl) {
1405 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1411 * If a new destination address is specified, scrub the old one and
1412 * install the new destination. Note that the interface must be
1415 pdst = &ifra->ifra_dstaddr;
1416 if (pdst->sin6_family == AF_INET6 &&
1417 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1418 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1419 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1420 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1421 "remove a route to the old destination: %s\n",
1422 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1423 /* proceed anyway... */
1425 ia->ia_flags &= ~IFA_ROUTE;
1426 ia->ia_dstaddr = *pdst;
1430 * If a new destination address is specified for a point-to-point
1431 * interface, install a route to the destination as an interface
1433 * XXX: the logic below rejects assigning multiple addresses on a p2p
1434 * interface that share the same destination.
1436 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1437 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1438 ia->ia_dstaddr.sin6_family == AF_INET6) {
1439 int rtflags = RTF_UP | RTF_HOST;
1441 * Handle the case for ::1 .
1443 if (ifp->if_flags & IFF_LOOPBACK)
1444 ia->ia_flags |= IFA_RTSELF;
1445 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1448 ia->ia_flags |= IFA_ROUTE;
1452 * add a loopback route to self if not exists
1454 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1455 error = ifa_add_loopback_route((struct ifaddr *)ia,
1456 (struct sockaddr *)&ia->ia_addr);
1458 ia->ia_flags |= IFA_RTSELF;
1461 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1462 "Invoking IPv6 network device address event may sleep");
1464 ifa_ref(&ia->ia_ifa);
1465 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
1467 ifa_free(&ia->ia_ifa);
1473 * Find an IPv6 interface link-local address specific to an interface.
1474 * ifaddr is returned referenced.
1477 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1483 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1484 if (ifa->ifa_addr->sa_family != AF_INET6)
1486 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1487 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1495 return ((struct in6_ifaddr *)ifa);
1499 * find the interface address corresponding to a given IPv6 address.
1500 * ifaddr is returned referenced.
1503 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1505 struct rm_priotracker in6_ifa_tracker;
1506 struct in6_ifaddr *ia;
1508 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1509 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1510 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1512 zoneid != ia->ia_addr.sin6_scope_id)
1514 ifa_ref(&ia->ia_ifa);
1518 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1523 * find the internet address corresponding to a given interface and address.
1524 * ifaddr is returned referenced.
1527 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1529 struct epoch_tracker et;
1532 NET_EPOCH_ENTER(et);
1533 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1534 if (ifa->ifa_addr->sa_family != AF_INET6)
1536 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1543 return ((struct in6_ifaddr *)ifa);
1547 * Find a link-local scoped address on ifp and return it if any.
1550 in6ifa_llaonifp(struct ifnet *ifp)
1552 struct epoch_tracker et;
1553 struct sockaddr_in6 *sin6;
1556 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1558 NET_EPOCH_ENTER(et);
1559 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1560 if (ifa->ifa_addr->sa_family != AF_INET6)
1562 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1563 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1564 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1565 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1570 return ((struct in6_ifaddr *)ifa);
1574 * Convert IP6 address to printable (loggable) representation. Caller
1575 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1577 static char digits[] = "0123456789abcdef";
1579 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1581 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1583 const u_int16_t *a = (const u_int16_t *)addr;
1585 int dcolon = 0, zero = 0;
1589 for (i = 0; i < 8; i++) {
1590 if (*(a + i) == 0) {
1595 else if (maxcnt < cnt) {
1606 for (i = 0; i < 8; i++) {
1617 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1629 d = (const u_char *)a;
1630 /* Try to eliminate leading zeros in printout like in :0001. */
1632 *cp = digits[*d >> 4];
1637 *cp = digits[*d++ & 0xf];
1638 if (zero == 0 || (*cp != '0')) {
1642 *cp = digits[*d >> 4];
1643 if (zero == 0 || (*cp != '0')) {
1647 *cp++ = digits[*d & 0xf];
1656 in6_localaddr(struct in6_addr *in6)
1658 struct rm_priotracker in6_ifa_tracker;
1659 struct in6_ifaddr *ia;
1661 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1664 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1665 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1666 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1667 &ia->ia_prefixmask.sin6_addr)) {
1668 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1672 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1678 * Return 1 if an internet address is for the local host and configured
1679 * on one of its interfaces.
1682 in6_localip(struct in6_addr *in6)
1684 struct rm_priotracker in6_ifa_tracker;
1685 struct in6_ifaddr *ia;
1687 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1688 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1689 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1694 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1699 * Return 1 if an internet address is configured on an interface.
1702 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1704 struct in6_addr in6;
1706 struct in6_ifaddr *ia6;
1711 if (in6_clearscope(&in6))
1713 in6_setscope(&in6, ifp, NULL);
1715 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1716 if (ifa->ifa_addr->sa_family != AF_INET6)
1718 ia6 = (struct in6_ifaddr *)ifa;
1719 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6))
1727 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1729 struct rm_priotracker in6_ifa_tracker;
1730 struct in6_ifaddr *ia;
1732 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1733 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1734 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1735 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1736 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1737 return (1); /* true */
1742 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1744 return (0); /* false */
1748 * return length of part which dst and src are equal
1752 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1755 u_char *s = (u_char *)src, *d = (u_char *)dst;
1756 u_char *lim = s + 16, r;
1759 if ((r = (*d++ ^ *s++)) != 0) {
1770 /* XXX: to be scope conscious */
1772 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1774 int bytelen, bitlen;
1777 if (0 > len || len > 128) {
1778 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1786 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1789 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1790 p2->s6_addr[bytelen] >> (8 - bitlen))
1797 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1799 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1800 int bytelen, bitlen, i;
1803 if (0 > len || len > 128) {
1804 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1809 bzero(maskp, sizeof(*maskp));
1812 for (i = 0; i < bytelen; i++)
1813 maskp->s6_addr[i] = 0xff;
1815 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1819 * return the best address out of the same scope. if no address was
1820 * found, return the first valid address from designated IF.
1823 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1825 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1827 struct in6_ifaddr *besta = NULL;
1828 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1832 dep[0] = dep[1] = NULL;
1835 * We first look for addresses in the same scope.
1836 * If there is one, return it.
1837 * If two or more, return one which matches the dst longest.
1838 * If none, return one of global addresses assigned other ifs.
1840 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1841 if (ifa->ifa_addr->sa_family != AF_INET6)
1843 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1844 continue; /* XXX: is there any case to allow anycast? */
1845 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1846 continue; /* don't use this interface */
1847 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1849 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1850 if (V_ip6_use_deprecated)
1851 dep[0] = (struct in6_ifaddr *)ifa;
1855 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1857 * call in6_matchlen() as few as possible
1861 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1862 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1865 besta = (struct in6_ifaddr *)ifa;
1868 besta = (struct in6_ifaddr *)ifa;
1872 ifa_ref(&besta->ia_ifa);
1876 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1877 if (ifa->ifa_addr->sa_family != AF_INET6)
1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1880 continue; /* XXX: is there any case to allow anycast? */
1881 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1882 continue; /* don't use this interface */
1883 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1885 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1886 if (V_ip6_use_deprecated)
1887 dep[1] = (struct in6_ifaddr *)ifa;
1893 return (struct in6_ifaddr *)ifa;
1896 /* use the last-resort values, that are, deprecated addresses */
1898 ifa_ref((struct ifaddr *)dep[0]);
1902 ifa_ref((struct ifaddr *)dep[1]);
1910 * perform DAD when interface becomes IFF_UP.
1913 in6_if_up(struct ifnet *ifp)
1915 struct epoch_tracker et;
1917 struct in6_ifaddr *ia;
1919 NET_EPOCH_ENTER(et);
1920 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1921 if (ifa->ifa_addr->sa_family != AF_INET6)
1923 ia = (struct in6_ifaddr *)ifa;
1924 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1926 * The TENTATIVE flag was likely set by hand
1927 * beforehand, implicitly indicating the need for DAD.
1928 * We may be able to skip the random delay in this
1929 * case, but we impose delays just in case.
1932 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1938 * special cases, like 6to4, are handled in in6_ifattach
1940 in6_ifattach(ifp, NULL);
1944 in6if_do_dad(struct ifnet *ifp)
1947 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1949 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1951 if ((ND_IFINFO(ifp)->flags &
1952 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0)
1958 * Calculate max IPv6 MTU through all the interfaces and store it
1964 struct epoch_tracker et;
1965 unsigned long maxmtu = 0;
1968 NET_EPOCH_ENTER(et);
1969 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1970 /* this function can be called during ifnet initialization */
1971 if (!ifp->if_afdata[AF_INET6])
1973 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1974 IN6_LINKMTU(ifp) > maxmtu)
1975 maxmtu = IN6_LINKMTU(ifp);
1978 if (maxmtu) /* update only when maxmtu is positive */
1979 V_in6_maxmtu = maxmtu;
1983 * Provide the length of interface identifiers to be used for the link attached
1984 * to the given interface. The length should be defined in "IPv6 over
1985 * xxx-link" document. Note that address architecture might also define
1986 * the length for a particular set of address prefixes, regardless of the
1987 * link type. As clarified in rfc2462bis, those two definitions should be
1988 * consistent, and those really are as of August 2004.
1991 in6_if2idlen(struct ifnet *ifp)
1993 switch (ifp->if_type) {
1994 case IFT_ETHER: /* RFC2464 */
1995 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
1996 case IFT_L2VLAN: /* ditto */
1997 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
1998 case IFT_INFINIBAND:
2000 case IFT_PPP: /* RFC2472 */
2002 case IFT_FRELAY: /* RFC2590 */
2004 case IFT_IEEE1394: /* RFC3146 */
2007 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2009 return (64); /* XXX: is this really correct? */
2012 * Unknown link type:
2013 * It might be controversial to use the today's common constant
2014 * of 64 for these cases unconditionally. For full compliance,
2015 * we should return an error in this case. On the other hand,
2016 * if we simply miss the standard for the link type or a new
2017 * standard is defined for a new link type, the IFID length
2018 * is very likely to be the common constant. As a compromise,
2019 * we always use the constant, but make an explicit notice
2020 * indicating the "unknown" case.
2022 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2027 struct in6_llentry {
2028 struct llentry base;
2031 #define IN6_LLTBL_DEFAULT_HSIZE 32
2032 #define IN6_LLTBL_HASH(k, h) \
2033 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2036 * Do actual deallocation of @lle.
2039 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2041 struct llentry *lle;
2043 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2044 LLE_LOCK_DESTROY(lle);
2045 LLE_REQ_DESTROY(lle);
2046 free(lle, M_LLTABLE);
2050 * Called by LLE_FREE_LOCKED when number of references
2054 in6_lltable_destroy_lle(struct llentry *lle)
2058 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2061 static struct llentry *
2062 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2064 struct in6_llentry *lle;
2066 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2067 if (lle == NULL) /* NB: caller generates msg */
2070 lle->base.r_l3addr.addr6 = *addr6;
2071 lle->base.lle_refcnt = 1;
2072 lle->base.lle_free = in6_lltable_destroy_lle;
2073 LLE_LOCK_INIT(&lle->base);
2074 LLE_REQ_INIT(&lle->base);
2075 callout_init(&lle->base.lle_timer, 1);
2077 return (&lle->base);
2081 in6_lltable_match_prefix(const struct sockaddr *saddr,
2082 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2084 const struct in6_addr *addr, *mask, *lle_addr;
2086 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2087 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2088 lle_addr = &lle->r_l3addr.addr6;
2090 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2093 if (lle->la_flags & LLE_IFADDR) {
2095 * Delete LLE_IFADDR records IFF address & flag matches.
2096 * Note that addr is the interface address within prefix
2099 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2100 (flags & LLE_STATIC) != 0)
2105 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2106 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2113 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2117 LLE_WLOCK_ASSERT(lle);
2118 KASSERT(llt != NULL, ("lltable is NULL"));
2120 /* Unlink entry from table */
2121 if ((lle->la_flags & LLE_LINKED) != 0) {
2123 IF_AFDATA_WLOCK_ASSERT(ifp);
2124 lltable_unlink_entry(llt, lle);
2131 in6_lltable_rtcheck(struct ifnet *ifp,
2133 const struct sockaddr *l3addr)
2135 const struct sockaddr_in6 *sin6;
2136 struct nhop_object *nh;
2137 struct in6_addr dst;
2139 char ip6buf[INET6_ADDRSTRLEN];
2143 KASSERT(l3addr->sa_family == AF_INET6,
2144 ("sin_family %d", l3addr->sa_family));
2146 sin6 = (const struct sockaddr_in6 *)l3addr;
2147 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2148 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2149 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0);
2150 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) {
2153 * Create an ND6 cache for an IPv6 neighbor
2154 * that is not covered by our own prefix.
2156 ifa = ifaof_ifpforaddr(l3addr, ifp);
2160 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2161 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2168 * Called by the datapath to indicate that the entry was used.
2171 in6_lltable_mark_used(struct llentry *lle)
2175 lle->r_skip_req = 0;
2178 * Set the hit time so the callback function
2179 * can determine the remaining time before
2180 * transiting to the DELAY state.
2182 lle->lle_hittime = time_uptime;
2183 LLE_REQ_UNLOCK(lle);
2186 static inline uint32_t
2187 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2190 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2194 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2197 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2201 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2203 struct sockaddr_in6 *sin6;
2205 sin6 = (struct sockaddr_in6 *)sa;
2206 bzero(sin6, sizeof(*sin6));
2207 sin6->sin6_family = AF_INET6;
2208 sin6->sin6_len = sizeof(*sin6);
2209 sin6->sin6_addr = lle->r_l3addr.addr6;
2212 static inline struct llentry *
2213 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2215 struct llentry *lle;
2216 struct llentries *lleh;
2219 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2220 lleh = &llt->lle_head[hashidx];
2221 CK_LIST_FOREACH(lle, lleh, lle_next) {
2222 if (lle->la_flags & LLE_DELETED)
2224 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2232 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2235 lle->la_flags |= LLE_DELETED;
2236 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2238 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2243 static struct llentry *
2244 in6_lltable_alloc(struct lltable *llt, u_int flags,
2245 const struct sockaddr *l3addr)
2247 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2248 struct ifnet *ifp = llt->llt_ifp;
2249 struct llentry *lle;
2250 char linkhdr[LLE_MAX_LINKHDR];
2254 KASSERT(l3addr->sa_family == AF_INET6,
2255 ("sin_family %d", l3addr->sa_family));
2258 * A route that covers the given address must have
2259 * been installed 1st because we are doing a resolution,
2262 if (!(flags & LLE_IFADDR) &&
2263 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2266 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2268 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2271 lle->la_flags = flags;
2272 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2273 linkhdrsize = LLE_MAX_LINKHDR;
2274 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2275 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2276 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2279 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2281 lle->la_flags |= LLE_STATIC;
2284 if ((lle->la_flags & LLE_STATIC) != 0)
2285 lle->ln_state = ND6_LLINFO_REACHABLE;
2290 static struct llentry *
2291 in6_lltable_lookup(struct lltable *llt, u_int flags,
2292 const struct sockaddr *l3addr)
2294 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2295 struct llentry *lle;
2297 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2298 KASSERT(l3addr->sa_family == AF_INET6,
2299 ("sin_family %d", l3addr->sa_family));
2300 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2301 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2302 ("wrong lle request flags: %#x", flags));
2304 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2307 if (flags & LLE_UNLOCKED)
2310 if (flags & LLE_EXCLUSIVE)
2316 * If the afdata lock is not held, the LLE may have been unlinked while
2317 * we were blocked on the LLE lock. Check for this case.
2319 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2320 if (flags & LLE_EXCLUSIVE)
2330 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2331 struct sysctl_req *wr)
2333 struct ifnet *ifp = llt->llt_ifp;
2336 struct rt_msghdr rtm;
2337 struct sockaddr_in6 sin6;
2339 * ndp.c assumes that sdl is word aligned
2344 struct sockaddr_dl sdl;
2346 struct sockaddr_dl *sdl;
2349 bzero(&ndpc, sizeof(ndpc));
2350 /* skip deleted entries */
2351 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2353 /* Skip if jailed and not a valid IP of the prison. */
2354 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2355 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2358 * produce a msg made of:
2360 * struct sockaddr_in6 (IPv6)
2361 * struct sockaddr_dl;
2363 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2364 ndpc.rtm.rtm_version = RTM_VERSION;
2365 ndpc.rtm.rtm_type = RTM_GET;
2366 ndpc.rtm.rtm_flags = RTF_UP;
2367 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2368 sa6_recoverscope(&ndpc.sin6);
2371 if (lle->la_flags & LLE_PUB)
2372 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2375 sdl->sdl_family = AF_LINK;
2376 sdl->sdl_len = sizeof(*sdl);
2377 sdl->sdl_index = ifp->if_index;
2378 sdl->sdl_type = ifp->if_type;
2379 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2380 sdl->sdl_alen = ifp->if_addrlen;
2381 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2384 bzero(LLADDR(sdl), ifp->if_addrlen);
2386 if (lle->la_expire != 0)
2387 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2388 lle->lle_remtime / hz + time_second - time_uptime;
2389 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2390 if (lle->la_flags & LLE_STATIC)
2391 ndpc.rtm.rtm_flags |= RTF_STATIC;
2392 if (lle->la_flags & LLE_IFADDR)
2393 ndpc.rtm.rtm_flags |= RTF_PINNED;
2394 if (lle->ln_router != 0)
2395 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2396 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2397 /* Store state in rmx_weight value */
2398 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2399 ndpc.rtm.rtm_index = ifp->if_index;
2400 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2405 static struct lltable *
2406 in6_lltattach(struct ifnet *ifp)
2408 struct lltable *llt;
2410 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2411 llt->llt_af = AF_INET6;
2414 llt->llt_lookup = in6_lltable_lookup;
2415 llt->llt_alloc_entry = in6_lltable_alloc;
2416 llt->llt_delete_entry = in6_lltable_delete_entry;
2417 llt->llt_dump_entry = in6_lltable_dump_entry;
2418 llt->llt_hash = in6_lltable_hash;
2419 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2420 llt->llt_free_entry = in6_lltable_free_entry;
2421 llt->llt_match_prefix = in6_lltable_match_prefix;
2422 llt->llt_mark_used = in6_lltable_mark_used;
2429 in6_domifattach(struct ifnet *ifp)
2431 struct in6_ifextra *ext;
2433 /* There are not IPv6-capable interfaces. */
2434 switch (ifp->if_type) {
2440 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2441 bzero(ext, sizeof(*ext));
2443 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2444 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2445 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2446 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2448 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2449 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2451 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2452 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2454 ext->nd_ifinfo = nd6_ifattach(ifp);
2455 ext->scope6_id = scope6_ifattach(ifp);
2456 ext->lltable = in6_lltattach(ifp);
2458 ext->mld_ifinfo = mld_domifattach(ifp);
2464 in6_domifmtu(struct ifnet *ifp)
2466 if (ifp->if_afdata[AF_INET6] == NULL)
2469 return (IN6_LINKMTU(ifp));
2473 in6_domifdetach(struct ifnet *ifp, void *aux)
2475 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2477 mld_domifdetach(ifp);
2478 scope6_ifdetach(ext->scope6_id);
2479 nd6_ifdetach(ifp, ext->nd_ifinfo);
2480 lltable_free(ext->lltable);
2481 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2482 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2483 free(ext->in6_ifstat, M_IFADDR);
2484 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2485 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2486 free(ext->icmp6_ifstat, M_IFADDR);
2487 free(ext, M_IFADDR);
2491 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2492 * v4 mapped addr or v4 compat addr
2495 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2498 bzero(sin, sizeof(*sin));
2499 sin->sin_len = sizeof(struct sockaddr_in);
2500 sin->sin_family = AF_INET;
2501 sin->sin_port = sin6->sin6_port;
2502 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2505 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2507 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2509 bzero(sin6, sizeof(*sin6));
2510 sin6->sin6_len = sizeof(struct sockaddr_in6);
2511 sin6->sin6_family = AF_INET6;
2512 sin6->sin6_port = sin->sin_port;
2513 sin6->sin6_addr.s6_addr32[0] = 0;
2514 sin6->sin6_addr.s6_addr32[1] = 0;
2515 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2516 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2519 /* Convert sockaddr_in6 into sockaddr_in. */
2521 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2523 struct sockaddr_in *sin_p;
2524 struct sockaddr_in6 sin6;
2527 * Save original sockaddr_in6 addr and convert it
2530 sin6 = *(struct sockaddr_in6 *)nam;
2531 sin_p = (struct sockaddr_in *)nam;
2532 in6_sin6_2_sin(sin_p, &sin6);
2535 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2537 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2539 struct sockaddr_in *sin_p;
2540 struct sockaddr_in6 *sin6_p;
2542 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2543 sin_p = (struct sockaddr_in *)*nam;
2544 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2545 free(*nam, M_SONAME);
2546 *nam = (struct sockaddr *)sin6_p;