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/if_dl.h>
97 #include <netinet/in.h>
98 #include <netinet/in_var.h>
99 #include <net/if_llatbl.h>
100 #include <netinet/if_ether.h>
101 #include <netinet/in_systm.h>
102 #include <netinet/ip.h>
103 #include <netinet/in_pcb.h>
104 #include <netinet/ip_carp.h>
106 #include <netinet/ip6.h>
107 #include <netinet6/ip6_var.h>
108 #include <netinet6/nd6.h>
109 #include <netinet6/mld6_var.h>
110 #include <netinet6/ip6_mroute.h>
111 #include <netinet6/in6_ifattach.h>
112 #include <netinet6/scope6_var.h>
113 #include <netinet6/in6_fib.h>
114 #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))
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;
191 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib;
193 if (cmd == RTM_ADD) {
194 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
195 rt_routemsg_info(cmd, &info, fibnum);
196 } else if (cmd == RTM_DELETE) {
197 rt_routemsg_info(cmd, &info, fibnum);
198 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
203 in6_mask2len(struct in6_addr *mask, u_char *lim0)
206 u_char *lim = lim0, *p;
208 /* ignore the scope_id part */
209 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
210 lim = (u_char *)mask + sizeof(*mask);
211 for (p = (u_char *)mask; p < lim; x++, p++) {
217 for (y = 0; y < 8; y++) {
218 if ((*p & (0x80 >> y)) == 0)
224 * when the limit pointer is given, do a stricter check on the
228 if (y != 0 && (*p & (0x00ff >> y)) != 0)
230 for (p = p + 1; p < lim; p++)
238 #ifdef COMPAT_FREEBSD32
239 struct in6_ndifreq32 {
240 char ifname[IFNAMSIZ];
243 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
247 in6_control(struct socket *so, u_long cmd, caddr_t data,
248 struct ifnet *ifp, struct thread *td)
250 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
251 struct in6_ifaddr *ia = NULL;
252 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
253 struct sockaddr_in6 *sa6;
254 int carp_attached = 0;
259 * Compat to make pre-10.x ifconfig(8) operable.
261 if (cmd == OSIOCAIFADDR_IN6)
262 cmd = SIOCAIFADDR_IN6;
265 case SIOCGETSGCNT_IN6:
266 case SIOCGETMIFCNT_IN6:
268 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
269 * We cannot see how that would be needed, so do not adjust the
270 * KPI blindly; more likely should clean up the IPv4 variant.
272 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
276 case SIOCAADDRCTL_POLICY:
277 case SIOCDADDRCTL_POLICY:
279 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
283 return (in6_src_ioctl(cmd, data));
290 case SIOCSNDFLUSH_IN6:
291 case SIOCSPFXFLUSH_IN6:
292 case SIOCSRTRFLUSH_IN6:
293 case SIOCSDEFIFACE_IN6:
294 case SIOCSIFINFO_FLAGS:
295 case SIOCSIFINFO_IN6:
297 error = priv_check(td, PRIV_NETINET_ND6);
302 case OSIOCGIFINFO_IN6:
303 case SIOCGIFINFO_IN6:
304 case SIOCGNBRINFO_IN6:
305 case SIOCGDEFIFACE_IN6:
306 return (nd6_ioctl(cmd, data, ifp));
308 #ifdef COMPAT_FREEBSD32
309 case SIOCGDEFIFACE32_IN6:
311 struct in6_ndifreq ndif;
312 struct in6_ndifreq32 *ndif32;
314 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
318 ndif32 = (struct in6_ndifreq32 *)data;
319 ndif32->ifindex = ndif.ifindex;
326 case SIOCSIFPREFIX_IN6:
327 case SIOCDIFPREFIX_IN6:
328 case SIOCAIFPREFIX_IN6:
329 case SIOCCIFPREFIX_IN6:
330 case SIOCSGIFPREFIX_IN6:
331 case SIOCGIFPREFIX_IN6:
333 "prefix ioctls are now invalidated. "
334 "please use ifconfig.\n");
341 error = priv_check(td, PRIV_NETINET_SCOPE6);
348 return (scope6_ioctl(cmd, data, ifp));
352 * Find address for this interface, if it exists.
354 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
355 * only, and used the first interface address as the target of other
356 * operations (without checking ifra_addr). This was because netinet
357 * code/API assumed at most 1 interface address per interface.
358 * Since IPv6 allows a node to assign multiple addresses
359 * on a single interface, we almost always look and check the
360 * presence of ifra_addr, and reject invalid ones here.
361 * It also decreases duplicated code among SIOC*_IN6 operations.
364 case SIOCAIFADDR_IN6:
365 case SIOCSIFPHYADDR_IN6:
366 sa6 = &ifra->ifra_addr;
368 case SIOCSIFADDR_IN6:
369 case SIOCGIFADDR_IN6:
370 case SIOCSIFDSTADDR_IN6:
371 case SIOCSIFNETMASK_IN6:
372 case SIOCGIFDSTADDR_IN6:
373 case SIOCGIFNETMASK_IN6:
374 case SIOCDIFADDR_IN6:
375 case SIOCGIFPSRCADDR_IN6:
376 case SIOCGIFPDSTADDR_IN6:
377 case SIOCGIFAFLAG_IN6:
378 case SIOCSNDFLUSH_IN6:
379 case SIOCSPFXFLUSH_IN6:
380 case SIOCSRTRFLUSH_IN6:
381 case SIOCGIFALIFETIME_IN6:
382 case SIOCGIFSTAT_IN6:
383 case SIOCGIFSTAT_ICMP6:
384 sa6 = &ifr->ifr_addr;
391 * Although we should pass any non-INET6 ioctl requests
392 * down to driver, we filter some legacy INET requests.
393 * Drivers trust SIOCSIFADDR et al to come from an already
394 * privileged layer, and do not perform any credentials
395 * checks or input validation.
402 if (sa6 && sa6->sin6_family == AF_INET6) {
403 if (sa6->sin6_scope_id != 0)
404 error = sa6_embedscope(sa6, 0);
406 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
409 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
410 &sa6->sin6_addr)) != 0)
412 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
417 case SIOCSIFADDR_IN6:
418 case SIOCSIFDSTADDR_IN6:
419 case SIOCSIFNETMASK_IN6:
421 * Since IPv6 allows a node to assign multiple addresses
422 * on a single interface, SIOCSIFxxx ioctls are deprecated.
424 /* we decided to obsolete this command (20000704) */
428 case SIOCDIFADDR_IN6:
430 * for IPv4, we look for existing in_ifaddr here to allow
431 * "ifconfig if0 delete" to remove the first IPv4 address on
432 * the interface. For IPv6, as the spec allows multiple
433 * interface address from the day one, we consider "remove the
434 * first one" semantics to be not preferable.
437 error = EADDRNOTAVAIL;
441 case SIOCAIFADDR_IN6:
443 * We always require users to specify a valid IPv6 address for
444 * the corresponding operation.
446 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
447 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
448 error = EAFNOSUPPORT;
453 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
454 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
459 case SIOCGIFSTAT_IN6:
460 case SIOCGIFSTAT_ICMP6:
461 if (ifp->if_afdata[AF_INET6] == NULL) {
462 error = EPFNOSUPPORT;
467 case SIOCGIFADDR_IN6:
468 /* This interface is basically deprecated. use SIOCGIFCONF. */
470 case SIOCGIFAFLAG_IN6:
471 case SIOCGIFNETMASK_IN6:
472 case SIOCGIFDSTADDR_IN6:
473 case SIOCGIFALIFETIME_IN6:
474 /* must think again about its semantics */
476 error = EADDRNOTAVAIL;
483 case SIOCGIFADDR_IN6:
484 ifr->ifr_addr = ia->ia_addr;
485 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
489 case SIOCGIFDSTADDR_IN6:
490 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
494 ifr->ifr_dstaddr = ia->ia_dstaddr;
495 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
499 case SIOCGIFNETMASK_IN6:
500 ifr->ifr_addr = ia->ia_prefixmask;
503 case SIOCGIFAFLAG_IN6:
504 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
507 case SIOCGIFSTAT_IN6:
508 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
509 ifp->if_afdata[AF_INET6])->in6_ifstat,
510 &ifr->ifr_ifru.ifru_stat,
511 sizeof(struct in6_ifstat) / sizeof(uint64_t));
514 case SIOCGIFSTAT_ICMP6:
515 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
516 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
517 &ifr->ifr_ifru.ifru_icmp6stat,
518 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
521 case SIOCGIFALIFETIME_IN6:
522 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
523 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
525 struct in6_addrlifetime *retlt =
526 &ifr->ifr_ifru.ifru_lifetime;
529 * XXX: adjust expiration time assuming time_t is
533 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
534 if (ia->ia6_lifetime.ia6t_vltime <
535 maxexpire - ia->ia6_updatetime) {
536 retlt->ia6t_expire = ia->ia6_updatetime +
537 ia->ia6_lifetime.ia6t_vltime;
539 retlt->ia6t_expire = maxexpire;
541 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
543 struct in6_addrlifetime *retlt =
544 &ifr->ifr_ifru.ifru_lifetime;
547 * XXX: adjust expiration time assuming time_t is
551 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
552 if (ia->ia6_lifetime.ia6t_pltime <
553 maxexpire - ia->ia6_updatetime) {
554 retlt->ia6t_preferred = ia->ia6_updatetime +
555 ia->ia6_lifetime.ia6t_pltime;
557 retlt->ia6t_preferred = maxexpire;
561 case SIOCAIFADDR_IN6:
563 struct nd_prefixctl pr0;
564 struct nd_prefix *pr;
567 * first, make or update the interface address structure,
568 * and link it to the list.
570 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
573 if (ia->ia_ifa.ifa_carp)
574 (*carp_detach_p)(&ia->ia_ifa, true);
575 ifa_free(&ia->ia_ifa);
577 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
580 * this can happen when the user specify the 0 valid
586 if (cmd == ocmd && ifra->ifra_vhid > 0) {
587 if (carp_attach_p != NULL)
588 error = (*carp_attach_p)(&ia->ia_ifa,
591 error = EPROTONOSUPPORT;
599 * then, make the prefix on-link on the interface.
600 * XXX: we'd rather create the prefix before the address, but
601 * we need at least one address to install the corresponding
602 * interface route, so we configure the address first.
606 * convert mask to prefix length (prefixmask has already
607 * been validated in in6_update_ifa().
609 bzero(&pr0, sizeof(pr0));
611 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
613 if (pr0.ndpr_plen == 128) {
614 /* we don't need to install a host route. */
617 pr0.ndpr_prefix = ifra->ifra_addr;
618 /* apply the mask for safety. */
619 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
620 &ifra->ifra_prefixmask.sin6_addr);
623 * XXX: since we don't have an API to set prefix (not address)
624 * lifetimes, we just use the same lifetimes as addresses.
625 * The (temporarily) installed lifetimes can be overridden by
626 * later advertised RAs (when accept_rtadv is non 0), which is
627 * an intended behavior.
629 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
631 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
632 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
633 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
635 /* add the prefix if not yet. */
636 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
638 * nd6_prelist_add will install the corresponding
641 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
643 (*carp_detach_p)(&ia->ia_ifa, false);
648 /* relate the address to the prefix */
649 if (ia->ia6_ndpr == NULL) {
654 * If this is the first autoconf address from the
655 * prefix, create a temporary address as well
658 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
659 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
661 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
662 log(LOG_NOTICE, "in6_control: failed "
663 "to create a temporary address, "
671 * this might affect the status of autoconfigured addresses,
672 * that is, this address might make other addresses detached.
674 pfxlist_onlink_check();
678 * Try to clear the flag when a new IPv6 address is added
679 * onto an IFDISABLED interface and it succeeds.
681 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
682 struct in6_ndireq nd;
684 memset(&nd, 0, sizeof(nd));
685 nd.ndi.flags = ND_IFINFO(ifp)->flags;
686 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
687 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
688 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
689 "SIOCSIFINFO_FLAGS for -ifdisabled "
692 * Ignore failure of clearing the flag intentionally.
693 * The failure means address duplication was detected.
699 case SIOCDIFADDR_IN6:
701 struct nd_prefix *pr;
704 * If the address being deleted is the only one that owns
705 * the corresponding prefix, expire the prefix as well.
706 * XXX: theoretically, we don't have to worry about such
707 * relationship, since we separate the address management
708 * and the prefix management. We do this, however, to provide
709 * as much backward compatibility as possible in terms of
710 * the ioctl operation.
711 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
714 in6_purgeaddr(&ia->ia_ifa);
715 if (pr != NULL && pr->ndpr_addrcnt == 0) {
717 nd6_prefix_unlink(pr, NULL);
721 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
727 if (ifp->if_ioctl == NULL) {
731 error = (*ifp->if_ioctl)(ifp, cmd, data);
738 ifa_free(&ia->ia_ifa);
743 static struct in6_multi_mship *
744 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
745 int *errorp, int delay)
747 struct in6_multi_mship *imm;
750 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
756 delay = (delay * PR_FASTHZ) / hz;
758 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
761 free(imm, M_IP6MADDR);
768 * Join necessary multicast groups. Factored out from in6_update_ifa().
769 * This entire work should only be done once, for the default FIB.
772 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
773 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
775 char ip6buf[INET6_ADDRSTRLEN];
776 struct in6_addr mltaddr;
777 struct in6_multi_mship *imm;
780 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
782 /* Join solicited multicast addr for new host id. */
783 bzero(&mltaddr, sizeof(struct in6_addr));
784 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
785 mltaddr.s6_addr32[2] = htonl(1);
786 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
787 mltaddr.s6_addr8[12] = 0xff;
788 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
789 /* XXX: should not happen */
790 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
794 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
796 * We need a random delay for DAD on the address being
797 * configured. It also means delaying transmission of the
798 * corresponding MLD report to avoid report collision.
799 * [RFC 4861, Section 6.3.7]
801 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
803 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
805 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
806 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
807 if_name(ifp), error));
810 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
811 *in6m_sol = imm->i6mm_maddr;
814 * Join link-local all-nodes address.
816 mltaddr = in6addr_linklocal_allnodes;
817 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
818 goto cleanup; /* XXX: should not fail */
820 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
822 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
823 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
824 if_name(ifp), error));
827 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
830 * Join node information group address.
833 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
835 * The spec does not say anything about delay for this group,
836 * but the same logic should apply.
838 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
840 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
842 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
845 "%s: in6_joingroup failed for %s on %s "
846 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
847 &mltaddr), if_name(ifp), error));
848 /* XXX not very fatal, go on... */
850 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
852 if (V_icmp6_nodeinfo_oldmcprefix &&
853 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
854 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
857 "%s: in6_joingroup failed for %s on %s "
858 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
859 &mltaddr), if_name(ifp), error));
860 /* XXX not very fatal, go on... */
862 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
866 * Join interface-local all-nodes address.
867 * (ff01::1%ifN, and ff01::%ifN/32)
869 mltaddr = in6addr_nodelocal_allnodes;
870 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
871 goto cleanup; /* XXX: should not fail */
873 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
875 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
876 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
877 &mltaddr), if_name(ifp), error));
880 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
887 * Update parameters of an IPv6 interface address.
888 * If necessary, a new entry is created and linked into address chains.
889 * This function is separated from in6_control().
892 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
893 struct in6_ifaddr *ia, int flags)
895 int error, hostIsNew = 0;
897 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
902 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
906 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
908 if (hostIsNew != 0) {
909 in6_unlink_ifa(ia, ifp);
910 ifa_free(&ia->ia_ifa);
916 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
922 * Fill in basic IPv6 address request info.
925 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
926 const struct in6_addr *mask)
929 memset(ifra, 0, sizeof(struct in6_aliasreq));
931 ifra->ifra_addr.sin6_family = AF_INET6;
932 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
934 ifra->ifra_addr.sin6_addr = *addr;
936 ifra->ifra_prefixmask.sin6_family = AF_INET6;
937 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
939 ifra->ifra_prefixmask.sin6_addr = *mask;
943 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
944 struct in6_ifaddr *ia, int flags)
947 struct sockaddr_in6 dst6;
948 struct in6_addrlifetime *lt;
949 char ip6buf[INET6_ADDRSTRLEN];
951 /* Validate parameters */
952 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
956 * The destination address for a p2p link must have a family
957 * of AF_UNSPEC or AF_INET6.
959 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
960 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
961 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
962 return (EAFNOSUPPORT);
967 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
968 ifra->ifra_addr.sin6_family != AF_INET6)
972 * validate ifra_prefixmask. don't check sin6_family, netmask
973 * does not carry fields other than sin6_len.
975 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
978 * Because the IPv6 address architecture is classless, we require
979 * users to specify a (non 0) prefix length (mask) for a new address.
980 * We also require the prefix (when specified) mask is valid, and thus
981 * reject a non-consecutive mask.
983 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
985 if (ifra->ifra_prefixmask.sin6_len != 0) {
986 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
987 (u_char *)&ifra->ifra_prefixmask +
988 ifra->ifra_prefixmask.sin6_len);
993 * In this case, ia must not be NULL. We just use its prefix
996 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
999 * If the destination address on a p2p interface is specified,
1000 * and the address is a scoped one, validate/set the scope
1003 dst6 = ifra->ifra_dstaddr;
1004 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1005 (dst6.sin6_family == AF_INET6)) {
1006 struct in6_addr in6_tmp;
1009 in6_tmp = dst6.sin6_addr;
1010 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1011 return (EINVAL); /* XXX: should be impossible */
1013 if (dst6.sin6_scope_id != 0) {
1014 if (dst6.sin6_scope_id != zoneid)
1016 } else /* user omit to specify the ID. */
1017 dst6.sin6_scope_id = zoneid;
1019 /* convert into the internal form */
1020 if (sa6_embedscope(&dst6, 0))
1021 return (EINVAL); /* XXX: should be impossible */
1023 /* Modify original ifra_dstaddr to reflect changes */
1024 ifra->ifra_dstaddr = dst6;
1027 * The destination address can be specified only for a p2p or a
1028 * loopback interface. If specified, the corresponding prefix length
1031 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1032 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1033 /* XXX: noisy message */
1034 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1035 "be specified for a p2p or a loopback IF only\n"));
1039 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1040 "be 128 when dstaddr is specified\n"));
1044 /* lifetime consistency check */
1045 lt = &ifra->ifra_lifetime;
1046 if (lt->ia6t_pltime > lt->ia6t_vltime)
1048 if (lt->ia6t_vltime == 0) {
1050 * the following log might be noisy, but this is a typical
1051 * configuration mistake or a tool's bug.
1054 "in6_update_ifa: valid lifetime is 0 for %s\n",
1055 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1058 return (0); /* there's nothing to do */
1061 /* Check prefix mask */
1062 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1064 * We prohibit changing the prefix length of an existing
1066 * + such an operation should be rare in IPv6, and
1067 * + the operation would confuse prefix management.
1069 if (ia->ia_prefixmask.sin6_len != 0 &&
1070 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1071 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1072 "of an existing %s address should not be changed\n",
1073 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1084 * Allocate a new ifaddr and link it into chains.
1086 static struct in6_ifaddr *
1087 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1089 struct in6_ifaddr *ia;
1092 * When in6_alloc_ifa() is called in a process of a received
1093 * RA, it is called under an interrupt context. So, we should
1094 * call malloc with M_NOWAIT.
1096 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1099 LIST_INIT(&ia->ia6_memberships);
1100 /* Initialize the address and masks, and put time stamp */
1101 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1102 ia->ia_addr.sin6_family = AF_INET6;
1103 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1104 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1105 ia->ia_addr = ifra->ifra_addr;
1106 ia->ia6_createtime = time_uptime;
1107 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1109 * Some functions expect that ifa_dstaddr is not
1110 * NULL for p2p interfaces.
1112 ia->ia_ifa.ifa_dstaddr =
1113 (struct sockaddr *)&ia->ia_dstaddr;
1115 ia->ia_ifa.ifa_dstaddr = NULL;
1118 /* set prefix mask if any */
1119 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1120 if (ifra->ifra_prefixmask.sin6_len != 0) {
1121 ia->ia_prefixmask.sin6_family = AF_INET6;
1122 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1123 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1127 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1129 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1130 IF_ADDR_WUNLOCK(ifp);
1132 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1134 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1135 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1136 IN6_IFADDR_WUNLOCK();
1142 * Update/configure interface address parameters:
1144 * 1) Update lifetime
1145 * 2) Update interface metric ad flags
1146 * 3) Notify other subsystems
1149 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1150 struct in6_ifaddr *ia, int hostIsNew, int flags)
1154 /* update timestamp */
1155 ia->ia6_updatetime = time_uptime;
1158 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1159 * to see if the address is deprecated or invalidated, but initialize
1160 * these members for applications.
1162 ia->ia6_lifetime = ifra->ifra_lifetime;
1163 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1164 ia->ia6_lifetime.ia6t_expire =
1165 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1167 ia->ia6_lifetime.ia6t_expire = 0;
1168 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1169 ia->ia6_lifetime.ia6t_preferred =
1170 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1172 ia->ia6_lifetime.ia6t_preferred = 0;
1175 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1176 * userland, make it deprecated.
1178 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1179 ia->ia6_lifetime.ia6t_pltime = 0;
1180 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1184 * configure address flags.
1186 ia->ia6_flags = ifra->ifra_flags;
1189 * Make the address tentative before joining multicast addresses,
1190 * so that corresponding MLD responses would not have a tentative
1193 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1196 * DAD should be performed for an new address or addresses on
1197 * an interface with ND6_IFF_IFDISABLED.
1199 if (in6if_do_dad(ifp) &&
1200 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1201 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1203 /* notify other subsystems */
1204 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1210 * Do link-level ifa job:
1211 * 1) Add lle entry for added address
1212 * 2) Notifies routing socket users about new address
1213 * 3) join appropriate multicast group
1214 * 4) start DAD if enabled
1217 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1218 struct in6_ifaddr *ia, int flags)
1220 struct in6_multi *in6m_sol;
1223 /* Add local address to lltable, if necessary (ex. on p2p link). */
1224 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1225 in6_purgeaddr(&ia->ia_ifa);
1226 ifa_free(&ia->ia_ifa);
1230 /* Join necessary multicast groups. */
1232 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1233 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1235 in6_purgeaddr(&ia->ia_ifa);
1236 ifa_free(&ia->ia_ifa);
1241 /* Perform DAD, if the address is TENTATIVE. */
1242 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1243 int delay, mindelay, maxdelay;
1246 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1248 * We need to impose a delay before sending an NS
1249 * for DAD. Check if we also needed a delay for the
1250 * corresponding MLD message. If we did, the delay
1251 * should be larger than the MLD delay (this could be
1252 * relaxed a bit, but this simple logic is at least
1254 * XXX: Break data hiding guidelines and look at
1255 * state for the solicited multicast group.
1258 if (in6m_sol != NULL &&
1259 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1260 mindelay = in6m_sol->in6m_timer;
1262 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1263 if (maxdelay - mindelay == 0)
1267 (arc4random() % (maxdelay - mindelay)) +
1271 nd6_dad_start((struct ifaddr *)ia, delay);
1274 in6_newaddrmsg(ia, RTM_ADD);
1275 ifa_free(&ia->ia_ifa);
1280 in6_purgeaddr(struct ifaddr *ifa)
1282 struct ifnet *ifp = ifa->ifa_ifp;
1283 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1284 struct in6_multi_mship *imm;
1288 (*carp_detach_p)(ifa, false);
1291 * Remove the loopback route to the interface address.
1292 * The check for the current setting of "nd6_useloopback"
1295 if (ia->ia_flags & IFA_RTSELF) {
1296 error = ifa_del_loopback_route((struct ifaddr *)ia,
1297 (struct sockaddr *)&ia->ia_addr);
1299 ia->ia_flags &= ~IFA_RTSELF;
1302 /* stop DAD processing */
1305 /* Leave multicast groups. */
1306 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1307 LIST_REMOVE(imm, i6mm_chain);
1308 if (imm->i6mm_maddr != NULL)
1309 in6_leavegroup(imm->i6mm_maddr, NULL);
1310 free(imm, M_IP6MADDR);
1312 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1313 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1314 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1315 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1317 log(LOG_INFO, "%s: err=%d, destination address delete "
1318 "failed\n", __func__, error);
1319 ia->ia_flags &= ~IFA_ROUTE;
1322 in6_newaddrmsg(ia, RTM_DELETE);
1323 in6_unlink_ifa(ia, ifp);
1327 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1329 char ip6buf[INET6_ADDRSTRLEN];
1333 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1334 IF_ADDR_WUNLOCK(ifp);
1335 ifa_free(&ia->ia_ifa); /* if_addrhead */
1338 * Defer the release of what might be the last reference to the
1339 * in6_ifaddr so that it can't be freed before the remainder of the
1343 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1344 CK_LIST_REMOVE(ia, ia6_hash);
1345 IN6_IFADDR_WUNLOCK();
1348 * Release the reference to the base prefix. There should be a
1349 * positive reference.
1352 if (ia->ia6_ndpr == NULL) {
1354 "in6_unlink_ifa: autoconf'ed address "
1355 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1357 ia->ia6_ndpr->ndpr_addrcnt--;
1358 /* Do not delete lles within prefix if refcont != 0 */
1359 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1361 ia->ia6_ndpr = NULL;
1364 nd6_rem_ifa_lle(ia, remove_lle);
1367 * Also, if the address being removed is autoconf'ed, call
1368 * pfxlist_onlink_check() since the release might affect the status of
1369 * other (detached) addresses.
1371 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1372 pfxlist_onlink_check();
1374 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1378 * Notifies other subsystems about address change/arrival:
1379 * 1) Notifies device handler on the first IPv6 address assignment
1380 * 2) Handle routing table changes for P2P links and route
1381 * 3) Handle routing table changes for address host route
1384 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1385 struct in6_aliasreq *ifra, int hostIsNew)
1387 int error = 0, plen, ifacount = 0;
1389 struct sockaddr_in6 *pdst;
1390 char ip6buf[INET6_ADDRSTRLEN];
1393 * Give the interface a chance to initialize
1394 * if this is its first address,
1396 if (hostIsNew != 0) {
1397 struct epoch_tracker et;
1399 NET_EPOCH_ENTER(et);
1400 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1401 if (ifa->ifa_addr->sa_family != AF_INET6)
1408 if (ifacount <= 1 && ifp->if_ioctl) {
1409 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1415 * If a new destination address is specified, scrub the old one and
1416 * install the new destination. Note that the interface must be
1419 pdst = &ifra->ifra_dstaddr;
1420 if (pdst->sin6_family == AF_INET6 &&
1421 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1422 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1423 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1424 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1425 "remove a route to the old destination: %s\n",
1426 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1427 /* proceed anyway... */
1429 ia->ia_flags &= ~IFA_ROUTE;
1430 ia->ia_dstaddr = *pdst;
1434 * If a new destination address is specified for a point-to-point
1435 * interface, install a route to the destination as an interface
1437 * XXX: the logic below rejects assigning multiple addresses on a p2p
1438 * interface that share the same destination.
1440 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1441 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1442 ia->ia_dstaddr.sin6_family == AF_INET6) {
1443 int rtflags = RTF_UP | RTF_HOST;
1445 * Handle the case for ::1 .
1447 if (ifp->if_flags & IFF_LOOPBACK)
1448 ia->ia_flags |= IFA_RTSELF;
1449 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1452 ia->ia_flags |= IFA_ROUTE;
1456 * add a loopback route to self if not exists
1458 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1459 error = ifa_add_loopback_route((struct ifaddr *)ia,
1460 (struct sockaddr *)&ia->ia_addr);
1462 ia->ia_flags |= IFA_RTSELF;
1465 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1466 "Invoking IPv6 network device address event may sleep");
1468 ifa_ref(&ia->ia_ifa);
1469 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
1471 ifa_free(&ia->ia_ifa);
1477 * Find an IPv6 interface link-local address specific to an interface.
1478 * ifaddr is returned referenced.
1481 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1487 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1488 if (ifa->ifa_addr->sa_family != AF_INET6)
1490 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1491 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1499 return ((struct in6_ifaddr *)ifa);
1504 * find the interface address corresponding to a given IPv6 address.
1505 * ifaddr is returned referenced.
1508 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1510 struct rm_priotracker in6_ifa_tracker;
1511 struct in6_ifaddr *ia;
1513 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1514 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1515 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1517 zoneid != ia->ia_addr.sin6_scope_id)
1519 ifa_ref(&ia->ia_ifa);
1523 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1528 * find the internet address corresponding to a given interface and address.
1529 * ifaddr is returned referenced.
1532 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1534 struct epoch_tracker et;
1537 NET_EPOCH_ENTER(et);
1538 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1539 if (ifa->ifa_addr->sa_family != AF_INET6)
1541 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1548 return ((struct in6_ifaddr *)ifa);
1552 * Find a link-local scoped address on ifp and return it if any.
1555 in6ifa_llaonifp(struct ifnet *ifp)
1557 struct epoch_tracker et;
1558 struct sockaddr_in6 *sin6;
1562 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1564 NET_EPOCH_ENTER(et);
1565 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1566 if (ifa->ifa_addr->sa_family != AF_INET6)
1568 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1569 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1570 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1571 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1576 return ((struct in6_ifaddr *)ifa);
1580 * Convert IP6 address to printable (loggable) representation. Caller
1581 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1583 static char digits[] = "0123456789abcdef";
1585 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1587 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1589 const u_int16_t *a = (const u_int16_t *)addr;
1591 int dcolon = 0, zero = 0;
1595 for (i = 0; i < 8; i++) {
1596 if (*(a + i) == 0) {
1601 else if (maxcnt < cnt) {
1612 for (i = 0; i < 8; i++) {
1623 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1635 d = (const u_char *)a;
1636 /* Try to eliminate leading zeros in printout like in :0001. */
1638 *cp = digits[*d >> 4];
1643 *cp = digits[*d++ & 0xf];
1644 if (zero == 0 || (*cp != '0')) {
1648 *cp = digits[*d >> 4];
1649 if (zero == 0 || (*cp != '0')) {
1653 *cp++ = digits[*d & 0xf];
1662 in6_localaddr(struct in6_addr *in6)
1664 struct rm_priotracker in6_ifa_tracker;
1665 struct in6_ifaddr *ia;
1667 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1670 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1671 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1672 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1673 &ia->ia_prefixmask.sin6_addr)) {
1674 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1678 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1684 * Return 1 if an internet address is for the local host and configured
1685 * on one of its interfaces.
1688 in6_localip(struct in6_addr *in6)
1690 struct rm_priotracker in6_ifa_tracker;
1691 struct in6_ifaddr *ia;
1693 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1694 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1695 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1696 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1700 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1705 * Return 1 if an internet address is configured on an interface.
1708 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1710 struct in6_addr in6;
1712 struct in6_ifaddr *ia6;
1717 if (in6_clearscope(&in6))
1719 in6_setscope(&in6, ifp, NULL);
1721 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1722 if (ifa->ifa_addr->sa_family != AF_INET6)
1724 ia6 = (struct in6_ifaddr *)ifa;
1725 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6))
1733 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1735 struct rm_priotracker in6_ifa_tracker;
1736 struct in6_ifaddr *ia;
1738 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1739 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1740 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1741 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1742 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1743 return (1); /* true */
1748 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1750 return (0); /* false */
1754 * return length of part which dst and src are equal
1758 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1761 u_char *s = (u_char *)src, *d = (u_char *)dst;
1762 u_char *lim = s + 16, r;
1765 if ((r = (*d++ ^ *s++)) != 0) {
1776 /* XXX: to be scope conscious */
1778 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1780 int bytelen, bitlen;
1783 if (0 > len || len > 128) {
1784 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1792 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1795 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1796 p2->s6_addr[bytelen] >> (8 - bitlen))
1803 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1805 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1806 int bytelen, bitlen, i;
1809 if (0 > len || len > 128) {
1810 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1815 bzero(maskp, sizeof(*maskp));
1818 for (i = 0; i < bytelen; i++)
1819 maskp->s6_addr[i] = 0xff;
1821 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1825 * return the best address out of the same scope. if no address was
1826 * found, return the first valid address from designated IF.
1829 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1831 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1833 struct in6_ifaddr *besta = NULL;
1834 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1838 dep[0] = dep[1] = NULL;
1841 * We first look for addresses in the same scope.
1842 * If there is one, return it.
1843 * If two or more, return one which matches the dst longest.
1844 * If none, return one of global addresses assigned other ifs.
1846 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1847 if (ifa->ifa_addr->sa_family != AF_INET6)
1849 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1850 continue; /* XXX: is there any case to allow anycast? */
1851 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1852 continue; /* don't use this interface */
1853 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1855 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1856 if (V_ip6_use_deprecated)
1857 dep[0] = (struct in6_ifaddr *)ifa;
1861 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1863 * call in6_matchlen() as few as possible
1867 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1868 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1871 besta = (struct in6_ifaddr *)ifa;
1874 besta = (struct in6_ifaddr *)ifa;
1878 ifa_ref(&besta->ia_ifa);
1882 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1883 if (ifa->ifa_addr->sa_family != AF_INET6)
1885 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1886 continue; /* XXX: is there any case to allow anycast? */
1887 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1888 continue; /* don't use this interface */
1889 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1891 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1892 if (V_ip6_use_deprecated)
1893 dep[1] = (struct in6_ifaddr *)ifa;
1899 return (struct in6_ifaddr *)ifa;
1902 /* use the last-resort values, that are, deprecated addresses */
1904 ifa_ref((struct ifaddr *)dep[0]);
1908 ifa_ref((struct ifaddr *)dep[1]);
1916 * perform DAD when interface becomes IFF_UP.
1919 in6_if_up(struct ifnet *ifp)
1921 struct epoch_tracker et;
1923 struct in6_ifaddr *ia;
1925 NET_EPOCH_ENTER(et);
1926 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1927 if (ifa->ifa_addr->sa_family != AF_INET6)
1929 ia = (struct in6_ifaddr *)ifa;
1930 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1932 * The TENTATIVE flag was likely set by hand
1933 * beforehand, implicitly indicating the need for DAD.
1934 * We may be able to skip the random delay in this
1935 * case, but we impose delays just in case.
1938 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1944 * special cases, like 6to4, are handled in in6_ifattach
1946 in6_ifattach(ifp, NULL);
1950 in6if_do_dad(struct ifnet *ifp)
1953 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1955 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1957 if ((ND_IFINFO(ifp)->flags &
1958 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0)
1964 * Calculate max IPv6 MTU through all the interfaces and store it
1970 struct epoch_tracker et;
1971 unsigned long maxmtu = 0;
1974 NET_EPOCH_ENTER(et);
1975 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1976 /* this function can be called during ifnet initialization */
1977 if (!ifp->if_afdata[AF_INET6])
1979 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1980 IN6_LINKMTU(ifp) > maxmtu)
1981 maxmtu = IN6_LINKMTU(ifp);
1984 if (maxmtu) /* update only when maxmtu is positive */
1985 V_in6_maxmtu = maxmtu;
1989 * Provide the length of interface identifiers to be used for the link attached
1990 * to the given interface. The length should be defined in "IPv6 over
1991 * xxx-link" document. Note that address architecture might also define
1992 * the length for a particular set of address prefixes, regardless of the
1993 * link type. As clarified in rfc2462bis, those two definitions should be
1994 * consistent, and those really are as of August 2004.
1997 in6_if2idlen(struct ifnet *ifp)
1999 switch (ifp->if_type) {
2000 case IFT_ETHER: /* RFC2464 */
2001 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2002 case IFT_L2VLAN: /* ditto */
2003 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
2004 case IFT_INFINIBAND:
2006 case IFT_PPP: /* RFC2472 */
2008 case IFT_FRELAY: /* RFC2590 */
2010 case IFT_IEEE1394: /* RFC3146 */
2013 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2015 return (64); /* XXX: is this really correct? */
2018 * Unknown link type:
2019 * It might be controversial to use the today's common constant
2020 * of 64 for these cases unconditionally. For full compliance,
2021 * we should return an error in this case. On the other hand,
2022 * if we simply miss the standard for the link type or a new
2023 * standard is defined for a new link type, the IFID length
2024 * is very likely to be the common constant. As a compromise,
2025 * we always use the constant, but make an explicit notice
2026 * indicating the "unknown" case.
2028 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2033 struct in6_llentry {
2034 struct llentry base;
2037 #define IN6_LLTBL_DEFAULT_HSIZE 32
2038 #define IN6_LLTBL_HASH(k, h) \
2039 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2042 * Do actual deallocation of @lle.
2045 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2047 struct llentry *lle;
2049 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2050 LLE_LOCK_DESTROY(lle);
2051 LLE_REQ_DESTROY(lle);
2052 free(lle, M_LLTABLE);
2056 * Called by LLE_FREE_LOCKED when number of references
2060 in6_lltable_destroy_lle(struct llentry *lle)
2064 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2067 static struct llentry *
2068 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2070 struct in6_llentry *lle;
2072 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2073 if (lle == NULL) /* NB: caller generates msg */
2076 lle->base.r_l3addr.addr6 = *addr6;
2077 lle->base.lle_refcnt = 1;
2078 lle->base.lle_free = in6_lltable_destroy_lle;
2079 LLE_LOCK_INIT(&lle->base);
2080 LLE_REQ_INIT(&lle->base);
2081 callout_init(&lle->base.lle_timer, 1);
2083 return (&lle->base);
2087 in6_lltable_match_prefix(const struct sockaddr *saddr,
2088 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2090 const struct in6_addr *addr, *mask, *lle_addr;
2092 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2093 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2094 lle_addr = &lle->r_l3addr.addr6;
2096 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2099 if (lle->la_flags & LLE_IFADDR) {
2102 * Delete LLE_IFADDR records IFF address & flag matches.
2103 * Note that addr is the interface address within prefix
2106 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2107 (flags & LLE_STATIC) != 0)
2112 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2113 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2120 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2124 LLE_WLOCK_ASSERT(lle);
2125 KASSERT(llt != NULL, ("lltable is NULL"));
2127 /* Unlink entry from table */
2128 if ((lle->la_flags & LLE_LINKED) != 0) {
2131 IF_AFDATA_WLOCK_ASSERT(ifp);
2132 lltable_unlink_entry(llt, lle);
2139 in6_lltable_rtcheck(struct ifnet *ifp,
2141 const struct sockaddr *l3addr)
2143 const struct sockaddr_in6 *sin6;
2144 struct nhop6_basic nh6;
2145 struct in6_addr dst;
2148 char ip6buf[INET6_ADDRSTRLEN];
2152 KASSERT(l3addr->sa_family == AF_INET6,
2153 ("sin_family %d", l3addr->sa_family));
2155 sin6 = (const struct sockaddr_in6 *)l3addr;
2156 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2157 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2158 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6);
2159 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2162 * Create an ND6 cache for an IPv6 neighbor
2163 * that is not covered by our own prefix.
2165 ifa = ifaof_ifpforaddr(l3addr, ifp);
2169 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2170 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2177 * Called by the datapath to indicate that the entry was used.
2180 in6_lltable_mark_used(struct llentry *lle)
2184 lle->r_skip_req = 0;
2187 * Set the hit time so the callback function
2188 * can determine the remaining time before
2189 * transiting to the DELAY state.
2191 lle->lle_hittime = time_uptime;
2192 LLE_REQ_UNLOCK(lle);
2195 static inline uint32_t
2196 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2199 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2203 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2206 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2210 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2212 struct sockaddr_in6 *sin6;
2214 sin6 = (struct sockaddr_in6 *)sa;
2215 bzero(sin6, sizeof(*sin6));
2216 sin6->sin6_family = AF_INET6;
2217 sin6->sin6_len = sizeof(*sin6);
2218 sin6->sin6_addr = lle->r_l3addr.addr6;
2221 static inline struct llentry *
2222 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2224 struct llentry *lle;
2225 struct llentries *lleh;
2228 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2229 lleh = &llt->lle_head[hashidx];
2230 CK_LIST_FOREACH(lle, lleh, lle_next) {
2231 if (lle->la_flags & LLE_DELETED)
2233 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2241 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2244 lle->la_flags |= LLE_DELETED;
2245 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2247 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2252 static struct llentry *
2253 in6_lltable_alloc(struct lltable *llt, u_int flags,
2254 const struct sockaddr *l3addr)
2256 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2257 struct ifnet *ifp = llt->llt_ifp;
2258 struct llentry *lle;
2259 char linkhdr[LLE_MAX_LINKHDR];
2263 KASSERT(l3addr->sa_family == AF_INET6,
2264 ("sin_family %d", l3addr->sa_family));
2267 * A route that covers the given address must have
2268 * been installed 1st because we are doing a resolution,
2271 if (!(flags & LLE_IFADDR) &&
2272 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2275 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2277 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2280 lle->la_flags = flags;
2281 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2282 linkhdrsize = LLE_MAX_LINKHDR;
2283 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2284 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2285 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2288 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2290 lle->la_flags |= LLE_STATIC;
2293 if ((lle->la_flags & LLE_STATIC) != 0)
2294 lle->ln_state = ND6_LLINFO_REACHABLE;
2299 static struct llentry *
2300 in6_lltable_lookup(struct lltable *llt, u_int flags,
2301 const struct sockaddr *l3addr)
2303 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2304 struct llentry *lle;
2306 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2307 KASSERT(l3addr->sa_family == AF_INET6,
2308 ("sin_family %d", l3addr->sa_family));
2309 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2310 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2311 ("wrong lle request flags: %#x", flags));
2313 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2316 if (flags & LLE_UNLOCKED)
2319 if (flags & LLE_EXCLUSIVE)
2325 * If the afdata lock is not held, the LLE may have been unlinked while
2326 * we were blocked on the LLE lock. Check for this case.
2328 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2329 if (flags & LLE_EXCLUSIVE)
2339 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2340 struct sysctl_req *wr)
2342 struct ifnet *ifp = llt->llt_ifp;
2345 struct rt_msghdr rtm;
2346 struct sockaddr_in6 sin6;
2348 * ndp.c assumes that sdl is word aligned
2353 struct sockaddr_dl sdl;
2355 struct sockaddr_dl *sdl;
2358 bzero(&ndpc, sizeof(ndpc));
2359 /* skip deleted entries */
2360 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2362 /* Skip if jailed and not a valid IP of the prison. */
2363 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2364 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2367 * produce a msg made of:
2369 * struct sockaddr_in6 (IPv6)
2370 * struct sockaddr_dl;
2372 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2373 ndpc.rtm.rtm_version = RTM_VERSION;
2374 ndpc.rtm.rtm_type = RTM_GET;
2375 ndpc.rtm.rtm_flags = RTF_UP;
2376 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2377 if (V_deembed_scopeid)
2378 sa6_recoverscope(&ndpc.sin6);
2381 if (lle->la_flags & LLE_PUB)
2382 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2385 sdl->sdl_family = AF_LINK;
2386 sdl->sdl_len = sizeof(*sdl);
2387 sdl->sdl_index = ifp->if_index;
2388 sdl->sdl_type = ifp->if_type;
2389 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2390 sdl->sdl_alen = ifp->if_addrlen;
2391 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2394 bzero(LLADDR(sdl), ifp->if_addrlen);
2396 if (lle->la_expire != 0)
2397 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2398 lle->lle_remtime / hz + time_second - time_uptime;
2399 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2400 if (lle->la_flags & LLE_STATIC)
2401 ndpc.rtm.rtm_flags |= RTF_STATIC;
2402 if (lle->la_flags & LLE_IFADDR)
2403 ndpc.rtm.rtm_flags |= RTF_PINNED;
2404 if (lle->ln_router != 0)
2405 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2406 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2407 /* Store state in rmx_weight value */
2408 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2409 ndpc.rtm.rtm_index = ifp->if_index;
2410 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2415 static struct lltable *
2416 in6_lltattach(struct ifnet *ifp)
2418 struct lltable *llt;
2420 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2421 llt->llt_af = AF_INET6;
2424 llt->llt_lookup = in6_lltable_lookup;
2425 llt->llt_alloc_entry = in6_lltable_alloc;
2426 llt->llt_delete_entry = in6_lltable_delete_entry;
2427 llt->llt_dump_entry = in6_lltable_dump_entry;
2428 llt->llt_hash = in6_lltable_hash;
2429 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2430 llt->llt_free_entry = in6_lltable_free_entry;
2431 llt->llt_match_prefix = in6_lltable_match_prefix;
2432 llt->llt_mark_used = in6_lltable_mark_used;
2439 in6_domifattach(struct ifnet *ifp)
2441 struct in6_ifextra *ext;
2443 /* There are not IPv6-capable interfaces. */
2444 switch (ifp->if_type) {
2450 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2451 bzero(ext, sizeof(*ext));
2453 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2454 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2455 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2456 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2458 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2459 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2461 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2462 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2464 ext->nd_ifinfo = nd6_ifattach(ifp);
2465 ext->scope6_id = scope6_ifattach(ifp);
2466 ext->lltable = in6_lltattach(ifp);
2468 ext->mld_ifinfo = mld_domifattach(ifp);
2474 in6_domifmtu(struct ifnet *ifp)
2476 if (ifp->if_afdata[AF_INET6] == NULL)
2479 return (IN6_LINKMTU(ifp));
2483 in6_domifdetach(struct ifnet *ifp, void *aux)
2485 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2487 mld_domifdetach(ifp);
2488 scope6_ifdetach(ext->scope6_id);
2489 nd6_ifdetach(ifp, ext->nd_ifinfo);
2490 lltable_free(ext->lltable);
2491 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2492 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2493 free(ext->in6_ifstat, M_IFADDR);
2494 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2495 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2496 free(ext->icmp6_ifstat, M_IFADDR);
2497 free(ext, M_IFADDR);
2501 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2502 * v4 mapped addr or v4 compat addr
2505 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2508 bzero(sin, sizeof(*sin));
2509 sin->sin_len = sizeof(struct sockaddr_in);
2510 sin->sin_family = AF_INET;
2511 sin->sin_port = sin6->sin6_port;
2512 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2515 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2517 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2519 bzero(sin6, sizeof(*sin6));
2520 sin6->sin6_len = sizeof(struct sockaddr_in6);
2521 sin6->sin6_family = AF_INET6;
2522 sin6->sin6_port = sin->sin_port;
2523 sin6->sin6_addr.s6_addr32[0] = 0;
2524 sin6->sin6_addr.s6_addr32[1] = 0;
2525 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2526 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2529 /* Convert sockaddr_in6 into sockaddr_in. */
2531 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2533 struct sockaddr_in *sin_p;
2534 struct sockaddr_in6 sin6;
2537 * Save original sockaddr_in6 addr and convert it
2540 sin6 = *(struct sockaddr_in6 *)nam;
2541 sin_p = (struct sockaddr_in *)nam;
2542 in6_sin6_2_sin(sin_p, &sin6);
2545 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2547 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2549 struct sockaddr_in *sin_p;
2550 struct sockaddr_in6 *sin6_p;
2552 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2553 sin_p = (struct sockaddr_in *)*nam;
2554 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2555 free(*nam, M_SONAME);
2556 *nam = (struct sockaddr *)sin6_p;