2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $
33 * Copyright (c) 1982, 1986, 1991, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * @(#)in.c 8.2 (Berkeley) 11/15/93
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
66 #include "opt_compat.h"
68 #include "opt_inet6.h"
70 #include <sys/param.h>
71 #include <sys/eventhandler.h>
72 #include <sys/errno.h>
74 #include <sys/malloc.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/sockio.h>
78 #include <sys/systm.h>
82 #include <sys/kernel.h>
84 #include <sys/rmlock.h>
85 #include <sys/syslog.h>
88 #include <net/if_var.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
91 #include <net/if_dl.h>
94 #include <netinet/in.h>
95 #include <netinet/in_var.h>
96 #include <net/if_llatbl.h>
97 #include <netinet/if_ether.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/ip.h>
100 #include <netinet/in_pcb.h>
101 #include <netinet/ip_carp.h>
103 #include <netinet/ip6.h>
104 #include <netinet6/ip6_var.h>
105 #include <netinet6/nd6.h>
106 #include <netinet6/mld6_var.h>
107 #include <netinet6/ip6_mroute.h>
108 #include <netinet6/in6_ifattach.h>
109 #include <netinet6/scope6_var.h>
110 #include <netinet6/in6_fib.h>
111 #include <netinet6/in6_pcb.h>
113 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
114 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
117 * Definitions of some costant IP6 addresses.
119 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
120 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
121 const struct in6_addr in6addr_nodelocal_allnodes =
122 IN6ADDR_NODELOCAL_ALLNODES_INIT;
123 const struct in6_addr in6addr_linklocal_allnodes =
124 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
125 const struct in6_addr in6addr_linklocal_allrouters =
126 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
127 const struct in6_addr in6addr_linklocal_allv2routers =
128 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
130 const struct in6_addr in6mask0 = IN6MASK0;
131 const struct in6_addr in6mask32 = IN6MASK32;
132 const struct in6_addr in6mask64 = IN6MASK64;
133 const struct in6_addr in6mask96 = IN6MASK96;
134 const struct in6_addr in6mask128 = IN6MASK128;
136 const struct sockaddr_in6 sa6_any =
137 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
139 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
140 struct in6_aliasreq *, int);
141 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
143 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
144 struct in6_ifaddr *, int);
145 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
146 struct in6_aliasreq *, int flags);
147 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
148 struct in6_ifaddr *, int, int);
149 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
150 struct in6_ifaddr *, int);
152 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
153 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
157 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
159 struct sockaddr_dl gateway;
160 struct sockaddr_in6 mask, addr;
164 * initialize for rtmsg generation
166 bzero(&gateway, sizeof(gateway));
167 gateway.sdl_len = sizeof(gateway);
168 gateway.sdl_family = AF_LINK;
170 bzero(&rt, sizeof(rt));
171 rt.rt_gateway = (struct sockaddr *)&gateway;
172 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
173 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
174 rt_mask(&rt) = (struct sockaddr *)&mask;
175 rt_key(&rt) = (struct sockaddr *)&addr;
176 rt.rt_flags = RTF_HOST | RTF_STATIC;
178 rt.rt_flags |= RTF_UP;
179 /* Announce arrival of local address to all FIBs. */
180 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt);
184 in6_mask2len(struct in6_addr *mask, u_char *lim0)
187 u_char *lim = lim0, *p;
189 /* ignore the scope_id part */
190 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
191 lim = (u_char *)mask + sizeof(*mask);
192 for (p = (u_char *)mask; p < lim; x++, p++) {
198 for (y = 0; y < 8; y++) {
199 if ((*p & (0x80 >> y)) == 0)
205 * when the limit pointer is given, do a stricter check on the
209 if (y != 0 && (*p & (0x00ff >> y)) != 0)
211 for (p = p + 1; p < lim; p++)
219 #ifdef COMPAT_FREEBSD32
220 struct in6_ndifreq32 {
221 char ifname[IFNAMSIZ];
224 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
228 in6_control(struct socket *so, u_long cmd, caddr_t data,
229 struct ifnet *ifp, struct thread *td)
231 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
232 struct in6_ifaddr *ia = NULL;
233 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
234 struct sockaddr_in6 *sa6;
235 int carp_attached = 0;
240 * Compat to make pre-10.x ifconfig(8) operable.
242 if (cmd == OSIOCAIFADDR_IN6)
243 cmd = SIOCAIFADDR_IN6;
246 case SIOCGETSGCNT_IN6:
247 case SIOCGETMIFCNT_IN6:
249 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
250 * We cannot see how that would be needed, so do not adjust the
251 * KPI blindly; more likely should clean up the IPv4 variant.
253 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
257 case SIOCAADDRCTL_POLICY:
258 case SIOCDADDRCTL_POLICY:
260 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
264 return (in6_src_ioctl(cmd, data));
271 case SIOCSNDFLUSH_IN6:
272 case SIOCSPFXFLUSH_IN6:
273 case SIOCSRTRFLUSH_IN6:
274 case SIOCSDEFIFACE_IN6:
275 case SIOCSIFINFO_FLAGS:
276 case SIOCSIFINFO_IN6:
278 error = priv_check(td, PRIV_NETINET_ND6);
283 case OSIOCGIFINFO_IN6:
284 case SIOCGIFINFO_IN6:
285 case SIOCGNBRINFO_IN6:
286 case SIOCGDEFIFACE_IN6:
287 return (nd6_ioctl(cmd, data, ifp));
289 #ifdef COMPAT_FREEBSD32
290 case SIOCGDEFIFACE32_IN6:
292 struct in6_ndifreq ndif;
293 struct in6_ndifreq32 *ndif32;
295 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
299 ndif32 = (struct in6_ndifreq32 *)data;
300 ndif32->ifindex = ndif.ifindex;
307 case SIOCSIFPREFIX_IN6:
308 case SIOCDIFPREFIX_IN6:
309 case SIOCAIFPREFIX_IN6:
310 case SIOCCIFPREFIX_IN6:
311 case SIOCSGIFPREFIX_IN6:
312 case SIOCGIFPREFIX_IN6:
314 "prefix ioctls are now invalidated. "
315 "please use ifconfig.\n");
322 error = priv_check(td, PRIV_NETINET_SCOPE6);
329 return (scope6_ioctl(cmd, data, ifp));
333 * Find address for this interface, if it exists.
335 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
336 * only, and used the first interface address as the target of other
337 * operations (without checking ifra_addr). This was because netinet
338 * code/API assumed at most 1 interface address per interface.
339 * Since IPv6 allows a node to assign multiple addresses
340 * on a single interface, we almost always look and check the
341 * presence of ifra_addr, and reject invalid ones here.
342 * It also decreases duplicated code among SIOC*_IN6 operations.
345 case SIOCAIFADDR_IN6:
346 case SIOCSIFPHYADDR_IN6:
347 sa6 = &ifra->ifra_addr;
349 case SIOCSIFADDR_IN6:
350 case SIOCGIFADDR_IN6:
351 case SIOCSIFDSTADDR_IN6:
352 case SIOCSIFNETMASK_IN6:
353 case SIOCGIFDSTADDR_IN6:
354 case SIOCGIFNETMASK_IN6:
355 case SIOCDIFADDR_IN6:
356 case SIOCGIFPSRCADDR_IN6:
357 case SIOCGIFPDSTADDR_IN6:
358 case SIOCGIFAFLAG_IN6:
359 case SIOCSNDFLUSH_IN6:
360 case SIOCSPFXFLUSH_IN6:
361 case SIOCSRTRFLUSH_IN6:
362 case SIOCGIFALIFETIME_IN6:
363 case SIOCGIFSTAT_IN6:
364 case SIOCGIFSTAT_ICMP6:
365 sa6 = &ifr->ifr_addr;
372 * Although we should pass any non-INET6 ioctl requests
373 * down to driver, we filter some legacy INET requests.
374 * Drivers trust SIOCSIFADDR et al to come from an already
375 * privileged layer, and do not perform any credentials
376 * checks or input validation.
383 if (sa6 && sa6->sin6_family == AF_INET6) {
384 if (sa6->sin6_scope_id != 0)
385 error = sa6_embedscope(sa6, 0);
387 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
390 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
391 &sa6->sin6_addr)) != 0)
393 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
398 case SIOCSIFADDR_IN6:
399 case SIOCSIFDSTADDR_IN6:
400 case SIOCSIFNETMASK_IN6:
402 * Since IPv6 allows a node to assign multiple addresses
403 * on a single interface, SIOCSIFxxx ioctls are deprecated.
405 /* we decided to obsolete this command (20000704) */
409 case SIOCDIFADDR_IN6:
411 * for IPv4, we look for existing in_ifaddr here to allow
412 * "ifconfig if0 delete" to remove the first IPv4 address on
413 * the interface. For IPv6, as the spec allows multiple
414 * interface address from the day one, we consider "remove the
415 * first one" semantics to be not preferable.
418 error = EADDRNOTAVAIL;
422 case SIOCAIFADDR_IN6:
424 * We always require users to specify a valid IPv6 address for
425 * the corresponding operation.
427 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
428 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
429 error = EAFNOSUPPORT;
434 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
435 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
440 case SIOCGIFSTAT_IN6:
441 case SIOCGIFSTAT_ICMP6:
442 if (ifp->if_afdata[AF_INET6] == NULL) {
443 error = EPFNOSUPPORT;
448 case SIOCGIFADDR_IN6:
449 /* This interface is basically deprecated. use SIOCGIFCONF. */
451 case SIOCGIFAFLAG_IN6:
452 case SIOCGIFNETMASK_IN6:
453 case SIOCGIFDSTADDR_IN6:
454 case SIOCGIFALIFETIME_IN6:
455 /* must think again about its semantics */
457 error = EADDRNOTAVAIL;
464 case SIOCGIFADDR_IN6:
465 ifr->ifr_addr = ia->ia_addr;
466 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
470 case SIOCGIFDSTADDR_IN6:
471 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
476 * XXX: should we check if ifa_dstaddr is NULL and return
479 ifr->ifr_dstaddr = ia->ia_dstaddr;
480 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
484 case SIOCGIFNETMASK_IN6:
485 ifr->ifr_addr = ia->ia_prefixmask;
488 case SIOCGIFAFLAG_IN6:
489 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
492 case SIOCGIFSTAT_IN6:
493 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
494 ifp->if_afdata[AF_INET6])->in6_ifstat,
495 &ifr->ifr_ifru.ifru_stat,
496 sizeof(struct in6_ifstat) / sizeof(uint64_t));
499 case SIOCGIFSTAT_ICMP6:
500 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
501 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
502 &ifr->ifr_ifru.ifru_icmp6stat,
503 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
506 case SIOCGIFALIFETIME_IN6:
507 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
508 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
510 struct in6_addrlifetime *retlt =
511 &ifr->ifr_ifru.ifru_lifetime;
514 * XXX: adjust expiration time assuming time_t is
518 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
519 if (ia->ia6_lifetime.ia6t_vltime <
520 maxexpire - ia->ia6_updatetime) {
521 retlt->ia6t_expire = ia->ia6_updatetime +
522 ia->ia6_lifetime.ia6t_vltime;
524 retlt->ia6t_expire = maxexpire;
526 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
528 struct in6_addrlifetime *retlt =
529 &ifr->ifr_ifru.ifru_lifetime;
532 * XXX: adjust expiration time assuming time_t is
536 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
537 if (ia->ia6_lifetime.ia6t_pltime <
538 maxexpire - ia->ia6_updatetime) {
539 retlt->ia6t_preferred = ia->ia6_updatetime +
540 ia->ia6_lifetime.ia6t_pltime;
542 retlt->ia6t_preferred = maxexpire;
546 case SIOCAIFADDR_IN6:
548 struct nd_prefixctl pr0;
549 struct nd_prefix *pr;
552 * first, make or update the interface address structure,
553 * and link it to the list.
555 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
558 ifa_free(&ia->ia_ifa);
559 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
562 * this can happen when the user specify the 0 valid
568 if (cmd == ocmd && ifra->ifra_vhid > 0) {
569 if (carp_attach_p != NULL)
570 error = (*carp_attach_p)(&ia->ia_ifa,
573 error = EPROTONOSUPPORT;
581 * then, make the prefix on-link on the interface.
582 * XXX: we'd rather create the prefix before the address, but
583 * we need at least one address to install the corresponding
584 * interface route, so we configure the address first.
588 * convert mask to prefix length (prefixmask has already
589 * been validated in in6_update_ifa().
591 bzero(&pr0, sizeof(pr0));
593 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
595 if (pr0.ndpr_plen == 128) {
596 /* we don't need to install a host route. */
599 pr0.ndpr_prefix = ifra->ifra_addr;
600 /* apply the mask for safety. */
601 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
602 &ifra->ifra_prefixmask.sin6_addr);
605 * XXX: since we don't have an API to set prefix (not address)
606 * lifetimes, we just use the same lifetimes as addresses.
607 * The (temporarily) installed lifetimes can be overridden by
608 * later advertised RAs (when accept_rtadv is non 0), which is
609 * an intended behavior.
611 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
613 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
614 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
615 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
617 /* add the prefix if not yet. */
618 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
620 * nd6_prelist_add will install the corresponding
623 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
625 (*carp_detach_p)(&ia->ia_ifa);
630 /* relate the address to the prefix */
631 if (ia->ia6_ndpr == NULL) {
636 * If this is the first autoconf address from the
637 * prefix, create a temporary address as well
640 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
641 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
643 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
644 log(LOG_NOTICE, "in6_control: failed "
645 "to create a temporary address, "
653 * this might affect the status of autoconfigured addresses,
654 * that is, this address might make other addresses detached.
656 pfxlist_onlink_check();
660 * Try to clear the flag when a new IPv6 address is added
661 * onto an IFDISABLED interface and it succeeds.
663 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
664 struct in6_ndireq nd;
666 memset(&nd, 0, sizeof(nd));
667 nd.ndi.flags = ND_IFINFO(ifp)->flags;
668 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
669 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
670 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
671 "SIOCSIFINFO_FLAGS for -ifdisabled "
674 * Ignore failure of clearing the flag intentionally.
675 * The failure means address duplication was detected.
678 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
682 case SIOCDIFADDR_IN6:
684 struct nd_prefix *pr;
687 * If the address being deleted is the only one that owns
688 * the corresponding prefix, expire the prefix as well.
689 * XXX: theoretically, we don't have to worry about such
690 * relationship, since we separate the address management
691 * and the prefix management. We do this, however, to provide
692 * as much backward compatibility as possible in terms of
693 * the ioctl operation.
694 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
697 in6_purgeaddr(&ia->ia_ifa);
698 if (pr != NULL && pr->ndpr_addrcnt == 0) {
700 nd6_prefix_unlink(pr, NULL);
704 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
709 if (ifp->if_ioctl == NULL) {
713 error = (*ifp->if_ioctl)(ifp, cmd, data);
720 ifa_free(&ia->ia_ifa);
726 * Join necessary multicast groups. Factored out from in6_update_ifa().
727 * This entire work should only be done once, for the default FIB.
730 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
731 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
733 char ip6buf[INET6_ADDRSTRLEN];
734 struct in6_addr mltaddr;
735 struct in6_multi_mship *imm;
738 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
740 /* Join solicited multicast addr for new host id. */
741 bzero(&mltaddr, sizeof(struct in6_addr));
742 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
743 mltaddr.s6_addr32[2] = htonl(1);
744 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
745 mltaddr.s6_addr8[12] = 0xff;
746 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
747 /* XXX: should not happen */
748 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
752 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
754 * We need a random delay for DAD on the address being
755 * configured. It also means delaying transmission of the
756 * corresponding MLD report to avoid report collision.
757 * [RFC 4861, Section 6.3.7]
759 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
761 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
763 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
764 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
765 if_name(ifp), error));
768 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
769 *in6m_sol = imm->i6mm_maddr;
772 * Join link-local all-nodes address.
774 mltaddr = in6addr_linklocal_allnodes;
775 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
776 goto cleanup; /* XXX: should not fail */
778 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
780 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
781 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
782 if_name(ifp), error));
785 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
788 * Join node information group address.
791 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
793 * The spec does not say anything about delay for this group,
794 * but the same logic should apply.
796 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
798 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
800 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
803 "%s: in6_joingroup failed for %s on %s "
804 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
805 &mltaddr), if_name(ifp), error));
806 /* XXX not very fatal, go on... */
808 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
810 if (V_icmp6_nodeinfo_oldmcprefix &&
811 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
812 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
815 "%s: in6_joingroup failed for %s on %s "
816 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
817 &mltaddr), if_name(ifp), error));
818 /* XXX not very fatal, go on... */
820 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
824 * Join interface-local all-nodes address.
825 * (ff01::1%ifN, and ff01::%ifN/32)
827 mltaddr = in6addr_nodelocal_allnodes;
828 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
829 goto cleanup; /* XXX: should not fail */
831 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
833 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
834 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
835 &mltaddr), if_name(ifp), error));
838 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
845 * Update parameters of an IPv6 interface address.
846 * If necessary, a new entry is created and linked into address chains.
847 * This function is separated from in6_control().
850 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
851 struct in6_ifaddr *ia, int flags)
853 int error, hostIsNew = 0;
855 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
860 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
864 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
866 if (hostIsNew != 0) {
867 in6_unlink_ifa(ia, ifp);
868 ifa_free(&ia->ia_ifa);
874 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
880 * Fill in basic IPv6 address request info.
883 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
884 const struct in6_addr *mask)
887 memset(ifra, 0, sizeof(struct in6_aliasreq));
889 ifra->ifra_addr.sin6_family = AF_INET6;
890 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
892 ifra->ifra_addr.sin6_addr = *addr;
894 ifra->ifra_prefixmask.sin6_family = AF_INET6;
895 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
897 ifra->ifra_prefixmask.sin6_addr = *mask;
901 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
902 struct in6_ifaddr *ia, int flags)
905 struct sockaddr_in6 dst6;
906 struct in6_addrlifetime *lt;
907 char ip6buf[INET6_ADDRSTRLEN];
909 /* Validate parameters */
910 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
914 * The destination address for a p2p link must have a family
915 * of AF_UNSPEC or AF_INET6.
917 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
918 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
919 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
920 return (EAFNOSUPPORT);
925 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
926 ifra->ifra_addr.sin6_family != AF_INET6)
930 * validate ifra_prefixmask. don't check sin6_family, netmask
931 * does not carry fields other than sin6_len.
933 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
936 * Because the IPv6 address architecture is classless, we require
937 * users to specify a (non 0) prefix length (mask) for a new address.
938 * We also require the prefix (when specified) mask is valid, and thus
939 * reject a non-consecutive mask.
941 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
943 if (ifra->ifra_prefixmask.sin6_len != 0) {
944 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
945 (u_char *)&ifra->ifra_prefixmask +
946 ifra->ifra_prefixmask.sin6_len);
951 * In this case, ia must not be NULL. We just use its prefix
954 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
957 * If the destination address on a p2p interface is specified,
958 * and the address is a scoped one, validate/set the scope
961 dst6 = ifra->ifra_dstaddr;
962 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
963 (dst6.sin6_family == AF_INET6)) {
964 struct in6_addr in6_tmp;
967 in6_tmp = dst6.sin6_addr;
968 if (in6_setscope(&in6_tmp, ifp, &zoneid))
969 return (EINVAL); /* XXX: should be impossible */
971 if (dst6.sin6_scope_id != 0) {
972 if (dst6.sin6_scope_id != zoneid)
974 } else /* user omit to specify the ID. */
975 dst6.sin6_scope_id = zoneid;
977 /* convert into the internal form */
978 if (sa6_embedscope(&dst6, 0))
979 return (EINVAL); /* XXX: should be impossible */
981 /* Modify original ifra_dstaddr to reflect changes */
982 ifra->ifra_dstaddr = dst6;
985 * The destination address can be specified only for a p2p or a
986 * loopback interface. If specified, the corresponding prefix length
989 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
990 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
991 /* XXX: noisy message */
992 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
993 "be specified for a p2p or a loopback IF only\n"));
997 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
998 "be 128 when dstaddr is specified\n"));
1002 /* lifetime consistency check */
1003 lt = &ifra->ifra_lifetime;
1004 if (lt->ia6t_pltime > lt->ia6t_vltime)
1006 if (lt->ia6t_vltime == 0) {
1008 * the following log might be noisy, but this is a typical
1009 * configuration mistake or a tool's bug.
1012 "in6_update_ifa: valid lifetime is 0 for %s\n",
1013 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1016 return (0); /* there's nothing to do */
1019 /* Check prefix mask */
1020 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1022 * We prohibit changing the prefix length of an existing
1024 * + such an operation should be rare in IPv6, and
1025 * + the operation would confuse prefix management.
1027 if (ia->ia_prefixmask.sin6_len != 0 &&
1028 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1029 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1030 "of an existing %s address should not be changed\n",
1031 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1042 * Allocate a new ifaddr and link it into chains.
1044 static struct in6_ifaddr *
1045 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1047 struct in6_ifaddr *ia;
1050 * When in6_alloc_ifa() is called in a process of a received
1051 * RA, it is called under an interrupt context. So, we should
1052 * call malloc with M_NOWAIT.
1054 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1057 LIST_INIT(&ia->ia6_memberships);
1058 /* Initialize the address and masks, and put time stamp */
1059 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1060 ia->ia_addr.sin6_family = AF_INET6;
1061 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1062 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1063 ia->ia_addr = ifra->ifra_addr;
1064 ia->ia6_createtime = time_uptime;
1065 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1067 * Some functions expect that ifa_dstaddr is not
1068 * NULL for p2p interfaces.
1070 ia->ia_ifa.ifa_dstaddr =
1071 (struct sockaddr *)&ia->ia_dstaddr;
1073 ia->ia_ifa.ifa_dstaddr = NULL;
1076 /* set prefix mask if any */
1077 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1078 if (ifra->ifra_prefixmask.sin6_len != 0) {
1079 ia->ia_prefixmask.sin6_family = AF_INET6;
1080 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1081 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1085 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1087 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1088 IF_ADDR_WUNLOCK(ifp);
1090 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1092 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1093 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1094 IN6_IFADDR_WUNLOCK();
1100 * Update/configure interface address parameters:
1102 * 1) Update lifetime
1103 * 2) Update interface metric ad flags
1104 * 3) Notify other subsystems
1107 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1108 struct in6_ifaddr *ia, int hostIsNew, int flags)
1112 /* update timestamp */
1113 ia->ia6_updatetime = time_uptime;
1116 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1117 * to see if the address is deprecated or invalidated, but initialize
1118 * these members for applications.
1120 ia->ia6_lifetime = ifra->ifra_lifetime;
1121 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1122 ia->ia6_lifetime.ia6t_expire =
1123 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1125 ia->ia6_lifetime.ia6t_expire = 0;
1126 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1127 ia->ia6_lifetime.ia6t_preferred =
1128 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1130 ia->ia6_lifetime.ia6t_preferred = 0;
1133 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1134 * userland, make it deprecated.
1136 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1137 ia->ia6_lifetime.ia6t_pltime = 0;
1138 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1142 * configure address flags.
1144 ia->ia6_flags = ifra->ifra_flags;
1147 * Make the address tentative before joining multicast addresses,
1148 * so that corresponding MLD responses would not have a tentative
1151 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1154 * DAD should be performed for an new address or addresses on
1155 * an interface with ND6_IFF_IFDISABLED.
1157 if (in6if_do_dad(ifp) &&
1158 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1159 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1161 /* notify other subsystems */
1162 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1168 * Do link-level ifa job:
1169 * 1) Add lle entry for added address
1170 * 2) Notifies routing socket users about new address
1171 * 3) join appropriate multicast group
1172 * 4) start DAD if enabled
1175 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1176 struct in6_ifaddr *ia, int flags)
1178 struct in6_multi *in6m_sol;
1181 /* Add local address to lltable, if necessary (ex. on p2p link). */
1182 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1183 in6_purgeaddr(&ia->ia_ifa);
1184 ifa_free(&ia->ia_ifa);
1188 /* Join necessary multicast groups. */
1190 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1191 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1193 in6_purgeaddr(&ia->ia_ifa);
1194 ifa_free(&ia->ia_ifa);
1199 /* Perform DAD, if the address is TENTATIVE. */
1200 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1201 int delay, mindelay, maxdelay;
1204 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1206 * We need to impose a delay before sending an NS
1207 * for DAD. Check if we also needed a delay for the
1208 * corresponding MLD message. If we did, the delay
1209 * should be larger than the MLD delay (this could be
1210 * relaxed a bit, but this simple logic is at least
1212 * XXX: Break data hiding guidelines and look at
1213 * state for the solicited multicast group.
1216 if (in6m_sol != NULL &&
1217 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1218 mindelay = in6m_sol->in6m_timer;
1220 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1221 if (maxdelay - mindelay == 0)
1225 (arc4random() % (maxdelay - mindelay)) +
1229 nd6_dad_start((struct ifaddr *)ia, delay);
1232 in6_newaddrmsg(ia, RTM_ADD);
1233 ifa_free(&ia->ia_ifa);
1238 in6_purgeaddr(struct ifaddr *ifa)
1240 struct ifnet *ifp = ifa->ifa_ifp;
1241 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1242 struct in6_multi_mship *imm;
1246 (*carp_detach_p)(ifa);
1249 * Remove the loopback route to the interface address.
1250 * The check for the current setting of "nd6_useloopback"
1253 if (ia->ia_flags & IFA_RTSELF) {
1254 error = ifa_del_loopback_route((struct ifaddr *)ia,
1255 (struct sockaddr *)&ia->ia_addr);
1257 ia->ia_flags &= ~IFA_RTSELF;
1260 /* stop DAD processing */
1263 /* Leave multicast groups. */
1264 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1265 LIST_REMOVE(imm, i6mm_chain);
1266 in6_leavegroup(imm);
1268 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1269 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1270 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1271 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1273 log(LOG_INFO, "%s: err=%d, destination address delete "
1274 "failed\n", __func__, error);
1275 ia->ia_flags &= ~IFA_ROUTE;
1278 in6_newaddrmsg(ia, RTM_DELETE);
1279 in6_unlink_ifa(ia, ifp);
1283 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1285 char ip6buf[INET6_ADDRSTRLEN];
1289 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1290 IF_ADDR_WUNLOCK(ifp);
1291 ifa_free(&ia->ia_ifa); /* if_addrhead */
1294 * Defer the release of what might be the last reference to the
1295 * in6_ifaddr so that it can't be freed before the remainder of the
1299 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1300 LIST_REMOVE(ia, ia6_hash);
1301 IN6_IFADDR_WUNLOCK();
1304 * Release the reference to the base prefix. There should be a
1305 * positive reference.
1308 if (ia->ia6_ndpr == NULL) {
1310 "in6_unlink_ifa: autoconf'ed address "
1311 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1313 ia->ia6_ndpr->ndpr_addrcnt--;
1314 /* Do not delete lles within prefix if refcont != 0 */
1315 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1317 ia->ia6_ndpr = NULL;
1320 nd6_rem_ifa_lle(ia, remove_lle);
1323 * Also, if the address being removed is autoconf'ed, call
1324 * pfxlist_onlink_check() since the release might affect the status of
1325 * other (detached) addresses.
1327 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1328 pfxlist_onlink_check();
1330 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1334 * Notifies other subsystems about address change/arrival:
1335 * 1) Notifies device handler on the first IPv6 address assignment
1336 * 2) Handle routing table changes for P2P links and route
1337 * 3) Handle routing table changes for address host route
1340 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1341 struct in6_aliasreq *ifra, int hostIsNew)
1343 int error = 0, plen, ifacount = 0;
1345 struct sockaddr_in6 *pdst;
1346 char ip6buf[INET6_ADDRSTRLEN];
1349 * Give the interface a chance to initialize
1350 * if this is its first address,
1352 if (hostIsNew != 0) {
1354 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1355 if (ifa->ifa_addr->sa_family != AF_INET6)
1359 IF_ADDR_RUNLOCK(ifp);
1362 if (ifacount <= 1 && ifp->if_ioctl) {
1363 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1369 * If a new destination address is specified, scrub the old one and
1370 * install the new destination. Note that the interface must be
1373 pdst = &ifra->ifra_dstaddr;
1374 if (pdst->sin6_family == AF_INET6 &&
1375 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1376 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1377 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1378 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1379 "remove a route to the old destination: %s\n",
1380 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1381 /* proceed anyway... */
1383 ia->ia_flags &= ~IFA_ROUTE;
1384 ia->ia_dstaddr = *pdst;
1388 * If a new destination address is specified for a point-to-point
1389 * interface, install a route to the destination as an interface
1391 * XXX: the logic below rejects assigning multiple addresses on a p2p
1392 * interface that share the same destination.
1394 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1395 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1396 ia->ia_dstaddr.sin6_family == AF_INET6) {
1397 int rtflags = RTF_UP | RTF_HOST;
1399 * Handle the case for ::1 .
1401 if (ifp->if_flags & IFF_LOOPBACK)
1402 ia->ia_flags |= IFA_RTSELF;
1403 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1406 ia->ia_flags |= IFA_ROUTE;
1410 * add a loopback route to self if not exists
1412 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1413 error = ifa_add_loopback_route((struct ifaddr *)ia,
1414 (struct sockaddr *)&ia->ia_addr);
1416 ia->ia_flags |= IFA_RTSELF;
1423 * Find an IPv6 interface link-local address specific to an interface.
1424 * ifaddr is returned referenced.
1427 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1432 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1433 if (ifa->ifa_addr->sa_family != AF_INET6)
1435 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1436 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1443 IF_ADDR_RUNLOCK(ifp);
1445 return ((struct in6_ifaddr *)ifa);
1450 * find the internet address corresponding to a given address.
1451 * ifaddr is returned referenced.
1454 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1456 struct rm_priotracker in6_ifa_tracker;
1457 struct in6_ifaddr *ia;
1459 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1460 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1461 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1463 zoneid != ia->ia_addr.sin6_scope_id)
1465 ifa_ref(&ia->ia_ifa);
1469 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1474 * find the internet address corresponding to a given interface and address.
1475 * ifaddr is returned referenced.
1478 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1483 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1484 if (ifa->ifa_addr->sa_family != AF_INET6)
1486 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1491 IF_ADDR_RUNLOCK(ifp);
1493 return ((struct in6_ifaddr *)ifa);
1497 * Find a link-local scoped address on ifp and return it if any.
1500 in6ifa_llaonifp(struct ifnet *ifp)
1502 struct sockaddr_in6 *sin6;
1505 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1508 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1509 if (ifa->ifa_addr->sa_family != AF_INET6)
1511 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1512 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1513 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1514 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1517 IF_ADDR_RUNLOCK(ifp);
1519 return ((struct in6_ifaddr *)ifa);
1523 * Convert IP6 address to printable (loggable) representation. Caller
1524 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1526 static char digits[] = "0123456789abcdef";
1528 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1530 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1532 const u_int16_t *a = (const u_int16_t *)addr;
1534 int dcolon = 0, zero = 0;
1538 for (i = 0; i < 8; i++) {
1539 if (*(a + i) == 0) {
1544 else if (maxcnt < cnt) {
1555 for (i = 0; i < 8; i++) {
1566 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1578 d = (const u_char *)a;
1579 /* Try to eliminate leading zeros in printout like in :0001. */
1581 *cp = digits[*d >> 4];
1586 *cp = digits[*d++ & 0xf];
1587 if (zero == 0 || (*cp != '0')) {
1591 *cp = digits[*d >> 4];
1592 if (zero == 0 || (*cp != '0')) {
1596 *cp++ = digits[*d & 0xf];
1605 in6_localaddr(struct in6_addr *in6)
1607 struct rm_priotracker in6_ifa_tracker;
1608 struct in6_ifaddr *ia;
1610 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1613 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1614 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1615 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1616 &ia->ia_prefixmask.sin6_addr)) {
1617 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1621 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1627 * Return 1 if an internet address is for the local host and configured
1628 * on one of its interfaces.
1631 in6_localip(struct in6_addr *in6)
1633 struct rm_priotracker in6_ifa_tracker;
1634 struct in6_ifaddr *ia;
1636 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1637 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1638 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1639 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1643 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1648 * Return 1 if an internet address is configured on an interface.
1651 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1653 struct in6_addr in6;
1655 struct in6_ifaddr *ia6;
1658 if (in6_clearscope(&in6))
1660 in6_setscope(&in6, ifp, NULL);
1663 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1664 if (ifa->ifa_addr->sa_family != AF_INET6)
1666 ia6 = (struct in6_ifaddr *)ifa;
1667 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1668 IF_ADDR_RUNLOCK(ifp);
1672 IF_ADDR_RUNLOCK(ifp);
1678 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1680 struct rm_priotracker in6_ifa_tracker;
1681 struct in6_ifaddr *ia;
1683 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1684 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1685 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1686 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1687 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1688 return (1); /* true */
1693 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1695 return (0); /* false */
1699 * return length of part which dst and src are equal
1703 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1706 u_char *s = (u_char *)src, *d = (u_char *)dst;
1707 u_char *lim = s + 16, r;
1710 if ((r = (*d++ ^ *s++)) != 0) {
1721 /* XXX: to be scope conscious */
1723 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1725 int bytelen, bitlen;
1728 if (0 > len || len > 128) {
1729 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1737 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1740 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1741 p2->s6_addr[bytelen] >> (8 - bitlen))
1748 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1750 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1751 int bytelen, bitlen, i;
1754 if (0 > len || len > 128) {
1755 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1760 bzero(maskp, sizeof(*maskp));
1763 for (i = 0; i < bytelen; i++)
1764 maskp->s6_addr[i] = 0xff;
1766 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1770 * return the best address out of the same scope. if no address was
1771 * found, return the first valid address from designated IF.
1774 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1776 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1778 struct in6_ifaddr *besta = NULL;
1779 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1781 dep[0] = dep[1] = NULL;
1784 * We first look for addresses in the same scope.
1785 * If there is one, return it.
1786 * If two or more, return one which matches the dst longest.
1787 * If none, return one of global addresses assigned other ifs.
1790 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1791 if (ifa->ifa_addr->sa_family != AF_INET6)
1793 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1794 continue; /* XXX: is there any case to allow anycast? */
1795 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1796 continue; /* don't use this interface */
1797 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1799 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1800 if (V_ip6_use_deprecated)
1801 dep[0] = (struct in6_ifaddr *)ifa;
1805 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1807 * call in6_matchlen() as few as possible
1811 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1812 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1815 besta = (struct in6_ifaddr *)ifa;
1818 besta = (struct in6_ifaddr *)ifa;
1822 ifa_ref(&besta->ia_ifa);
1823 IF_ADDR_RUNLOCK(ifp);
1827 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1828 if (ifa->ifa_addr->sa_family != AF_INET6)
1830 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1831 continue; /* XXX: is there any case to allow anycast? */
1832 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1833 continue; /* don't use this interface */
1834 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1837 if (V_ip6_use_deprecated)
1838 dep[1] = (struct in6_ifaddr *)ifa;
1844 IF_ADDR_RUNLOCK(ifp);
1845 return (struct in6_ifaddr *)ifa;
1848 /* use the last-resort values, that are, deprecated addresses */
1850 ifa_ref((struct ifaddr *)dep[0]);
1851 IF_ADDR_RUNLOCK(ifp);
1855 ifa_ref((struct ifaddr *)dep[1]);
1856 IF_ADDR_RUNLOCK(ifp);
1860 IF_ADDR_RUNLOCK(ifp);
1865 * perform DAD when interface becomes IFF_UP.
1868 in6_if_up(struct ifnet *ifp)
1871 struct in6_ifaddr *ia;
1874 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1875 if (ifa->ifa_addr->sa_family != AF_INET6)
1877 ia = (struct in6_ifaddr *)ifa;
1878 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1880 * The TENTATIVE flag was likely set by hand
1881 * beforehand, implicitly indicating the need for DAD.
1882 * We may be able to skip the random delay in this
1883 * case, but we impose delays just in case.
1886 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1889 IF_ADDR_RUNLOCK(ifp);
1892 * special cases, like 6to4, are handled in in6_ifattach
1894 in6_ifattach(ifp, NULL);
1898 in6if_do_dad(struct ifnet *ifp)
1900 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1903 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1904 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1908 * Our DAD routine requires the interface up and running.
1909 * However, some interfaces can be up before the RUNNING
1910 * status. Additionally, users may try to assign addresses
1911 * before the interface becomes up (or running).
1912 * This function returns EAGAIN in that case.
1913 * The caller should mark "tentative" on the address instead of
1914 * performing DAD immediately.
1916 if (!((ifp->if_flags & IFF_UP) &&
1917 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1924 * Calculate max IPv6 MTU through all the interfaces and store it
1930 unsigned long maxmtu = 0;
1933 IFNET_RLOCK_NOSLEEP();
1934 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1935 /* this function can be called during ifnet initialization */
1936 if (!ifp->if_afdata[AF_INET6])
1938 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1939 IN6_LINKMTU(ifp) > maxmtu)
1940 maxmtu = IN6_LINKMTU(ifp);
1942 IFNET_RUNLOCK_NOSLEEP();
1943 if (maxmtu) /* update only when maxmtu is positive */
1944 V_in6_maxmtu = maxmtu;
1948 * Provide the length of interface identifiers to be used for the link attached
1949 * to the given interface. The length should be defined in "IPv6 over
1950 * xxx-link" document. Note that address architecture might also define
1951 * the length for a particular set of address prefixes, regardless of the
1952 * link type. As clarified in rfc2462bis, those two definitions should be
1953 * consistent, and those really are as of August 2004.
1956 in6_if2idlen(struct ifnet *ifp)
1958 switch (ifp->if_type) {
1959 case IFT_ETHER: /* RFC2464 */
1960 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
1961 case IFT_L2VLAN: /* ditto */
1962 case IFT_IEEE80211: /* ditto */
1963 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
1964 case IFT_INFINIBAND:
1966 case IFT_FDDI: /* RFC2467 */
1968 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
1970 case IFT_PPP: /* RFC2472 */
1972 case IFT_ARCNET: /* RFC2497 */
1974 case IFT_FRELAY: /* RFC2590 */
1976 case IFT_IEEE1394: /* RFC3146 */
1979 return (64); /* draft-ietf-v6ops-mech-v2-07 */
1981 return (64); /* XXX: is this really correct? */
1984 * Unknown link type:
1985 * It might be controversial to use the today's common constant
1986 * of 64 for these cases unconditionally. For full compliance,
1987 * we should return an error in this case. On the other hand,
1988 * if we simply miss the standard for the link type or a new
1989 * standard is defined for a new link type, the IFID length
1990 * is very likely to be the common constant. As a compromise,
1991 * we always use the constant, but make an explicit notice
1992 * indicating the "unknown" case.
1994 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
1999 #include <sys/sysctl.h>
2001 struct in6_llentry {
2002 struct llentry base;
2005 #define IN6_LLTBL_DEFAULT_HSIZE 32
2006 #define IN6_LLTBL_HASH(k, h) \
2007 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2010 * Do actual deallocation of @lle.
2013 in6_lltable_destroy_lle_unlocked(struct llentry *lle)
2016 LLE_LOCK_DESTROY(lle);
2017 LLE_REQ_DESTROY(lle);
2018 free(lle, M_LLTABLE);
2022 * Called by LLE_FREE_LOCKED when number of references
2026 in6_lltable_destroy_lle(struct llentry *lle)
2030 in6_lltable_destroy_lle_unlocked(lle);
2033 static struct llentry *
2034 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2036 struct in6_llentry *lle;
2038 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2039 if (lle == NULL) /* NB: caller generates msg */
2042 lle->base.r_l3addr.addr6 = *addr6;
2043 lle->base.lle_refcnt = 1;
2044 lle->base.lle_free = in6_lltable_destroy_lle;
2045 LLE_LOCK_INIT(&lle->base);
2046 LLE_REQ_INIT(&lle->base);
2047 callout_init(&lle->base.lle_timer, 1);
2049 return (&lle->base);
2053 in6_lltable_match_prefix(const struct sockaddr *saddr,
2054 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2056 const struct in6_addr *addr, *mask, *lle_addr;
2058 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2059 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2060 lle_addr = &lle->r_l3addr.addr6;
2062 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2065 if (lle->la_flags & LLE_IFADDR) {
2068 * Delete LLE_IFADDR records IFF address & flag matches.
2069 * Note that addr is the interface address within prefix
2072 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2073 (flags & LLE_STATIC) != 0)
2078 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2079 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2086 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2090 LLE_WLOCK_ASSERT(lle);
2091 KASSERT(llt != NULL, ("lltable is NULL"));
2093 /* Unlink entry from table */
2094 if ((lle->la_flags & LLE_LINKED) != 0) {
2097 IF_AFDATA_WLOCK_ASSERT(ifp);
2098 lltable_unlink_entry(llt, lle);
2101 if (callout_stop(&lle->lle_timer) > 0)
2108 in6_lltable_rtcheck(struct ifnet *ifp,
2110 const struct sockaddr *l3addr)
2112 const struct sockaddr_in6 *sin6;
2113 struct nhop6_basic nh6;
2114 struct in6_addr dst;
2117 char ip6buf[INET6_ADDRSTRLEN];
2119 KASSERT(l3addr->sa_family == AF_INET6,
2120 ("sin_family %d", l3addr->sa_family));
2122 /* Our local addresses are always only installed on the default FIB. */
2124 sin6 = (const struct sockaddr_in6 *)l3addr;
2125 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2126 error = fib6_lookup_nh_basic(RT_DEFAULT_FIB, &dst, scopeid, 0, 0, &nh6);
2127 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2130 * Create an ND6 cache for an IPv6 neighbor
2131 * that is not covered by our own prefix.
2133 ifa = ifaof_ifpforaddr(l3addr, ifp);
2138 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2139 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2145 static inline uint32_t
2146 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2149 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2153 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2156 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2160 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2162 struct sockaddr_in6 *sin6;
2164 sin6 = (struct sockaddr_in6 *)sa;
2165 bzero(sin6, sizeof(*sin6));
2166 sin6->sin6_family = AF_INET6;
2167 sin6->sin6_len = sizeof(*sin6);
2168 sin6->sin6_addr = lle->r_l3addr.addr6;
2171 static inline struct llentry *
2172 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2174 struct llentry *lle;
2175 struct llentries *lleh;
2178 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2179 lleh = &llt->lle_head[hashidx];
2180 LIST_FOREACH(lle, lleh, lle_next) {
2181 if (lle->la_flags & LLE_DELETED)
2183 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2191 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2194 lle->la_flags |= LLE_DELETED;
2195 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2197 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2202 static struct llentry *
2203 in6_lltable_alloc(struct lltable *llt, u_int flags,
2204 const struct sockaddr *l3addr)
2206 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2207 struct ifnet *ifp = llt->llt_ifp;
2208 struct llentry *lle;
2209 char linkhdr[LLE_MAX_LINKHDR];
2213 KASSERT(l3addr->sa_family == AF_INET6,
2214 ("sin_family %d", l3addr->sa_family));
2217 * A route that covers the given address must have
2218 * been installed 1st because we are doing a resolution,
2221 if (!(flags & LLE_IFADDR) &&
2222 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2225 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2227 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2230 lle->la_flags = flags;
2231 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2232 linkhdrsize = LLE_MAX_LINKHDR;
2233 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2234 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2235 in6_lltable_destroy_lle_unlocked(lle);
2238 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2240 lle->la_flags |= LLE_STATIC;
2243 if ((lle->la_flags & LLE_STATIC) != 0)
2244 lle->ln_state = ND6_LLINFO_REACHABLE;
2249 static struct llentry *
2250 in6_lltable_lookup(struct lltable *llt, u_int flags,
2251 const struct sockaddr *l3addr)
2253 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2254 struct llentry *lle;
2256 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2257 KASSERT(l3addr->sa_family == AF_INET6,
2258 ("sin_family %d", l3addr->sa_family));
2260 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2265 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) !=
2266 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X",
2269 if (flags & LLE_UNLOCKED)
2272 if (flags & LLE_EXCLUSIVE)
2280 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2281 struct sysctl_req *wr)
2283 struct ifnet *ifp = llt->llt_ifp;
2286 struct rt_msghdr rtm;
2287 struct sockaddr_in6 sin6;
2289 * ndp.c assumes that sdl is word aligned
2294 struct sockaddr_dl sdl;
2296 struct sockaddr_dl *sdl;
2299 bzero(&ndpc, sizeof(ndpc));
2300 /* skip deleted entries */
2301 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2303 /* Skip if jailed and not a valid IP of the prison. */
2304 lltable_fill_sa_entry(lle,
2305 (struct sockaddr *)&ndpc.sin6);
2306 if (prison_if(wr->td->td_ucred,
2307 (struct sockaddr *)&ndpc.sin6) != 0)
2310 * produce a msg made of:
2312 * struct sockaddr_in6 (IPv6)
2313 * struct sockaddr_dl;
2315 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2316 ndpc.rtm.rtm_version = RTM_VERSION;
2317 ndpc.rtm.rtm_type = RTM_GET;
2318 ndpc.rtm.rtm_flags = RTF_UP;
2319 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2320 if (V_deembed_scopeid)
2321 sa6_recoverscope(&ndpc.sin6);
2324 if (lle->la_flags & LLE_PUB)
2325 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2328 sdl->sdl_family = AF_LINK;
2329 sdl->sdl_len = sizeof(*sdl);
2330 sdl->sdl_index = ifp->if_index;
2331 sdl->sdl_type = ifp->if_type;
2332 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2333 sdl->sdl_alen = ifp->if_addrlen;
2334 bcopy(lle->ll_addr, LLADDR(sdl),
2338 bzero(LLADDR(sdl), ifp->if_addrlen);
2340 if (lle->la_expire != 0)
2341 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2342 lle->lle_remtime / hz +
2343 time_second - time_uptime;
2344 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2345 if (lle->la_flags & LLE_STATIC)
2346 ndpc.rtm.rtm_flags |= RTF_STATIC;
2347 if (lle->la_flags & LLE_IFADDR)
2348 ndpc.rtm.rtm_flags |= RTF_PINNED;
2349 if (lle->ln_router != 0)
2350 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2351 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2352 /* Store state in rmx_weight value */
2353 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2354 ndpc.rtm.rtm_index = ifp->if_index;
2355 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2360 static struct lltable *
2361 in6_lltattach(struct ifnet *ifp)
2363 struct lltable *llt;
2365 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2366 llt->llt_af = AF_INET6;
2369 llt->llt_lookup = in6_lltable_lookup;
2370 llt->llt_alloc_entry = in6_lltable_alloc;
2371 llt->llt_delete_entry = in6_lltable_delete_entry;
2372 llt->llt_dump_entry = in6_lltable_dump_entry;
2373 llt->llt_hash = in6_lltable_hash;
2374 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2375 llt->llt_free_entry = in6_lltable_free_entry;
2376 llt->llt_match_prefix = in6_lltable_match_prefix;
2383 in6_domifattach(struct ifnet *ifp)
2385 struct in6_ifextra *ext;
2387 /* There are not IPv6-capable interfaces. */
2388 switch (ifp->if_type) {
2394 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2395 bzero(ext, sizeof(*ext));
2397 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2398 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2399 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2400 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2402 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2403 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2405 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2406 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2408 ext->nd_ifinfo = nd6_ifattach(ifp);
2409 ext->scope6_id = scope6_ifattach(ifp);
2410 ext->lltable = in6_lltattach(ifp);
2412 ext->mld_ifinfo = mld_domifattach(ifp);
2418 in6_domifmtu(struct ifnet *ifp)
2420 if (ifp->if_afdata[AF_INET6] == NULL)
2423 return (IN6_LINKMTU(ifp));
2427 in6_domifdetach(struct ifnet *ifp, void *aux)
2429 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2431 mld_domifdetach(ifp);
2432 scope6_ifdetach(ext->scope6_id);
2433 nd6_ifdetach(ifp, ext->nd_ifinfo);
2434 lltable_free(ext->lltable);
2435 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2436 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2437 free(ext->in6_ifstat, M_IFADDR);
2438 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2439 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2440 free(ext->icmp6_ifstat, M_IFADDR);
2441 free(ext, M_IFADDR);
2445 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2446 * v4 mapped addr or v4 compat addr
2449 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2452 bzero(sin, sizeof(*sin));
2453 sin->sin_len = sizeof(struct sockaddr_in);
2454 sin->sin_family = AF_INET;
2455 sin->sin_port = sin6->sin6_port;
2456 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2459 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2461 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2463 bzero(sin6, sizeof(*sin6));
2464 sin6->sin6_len = sizeof(struct sockaddr_in6);
2465 sin6->sin6_family = AF_INET6;
2466 sin6->sin6_port = sin->sin_port;
2467 sin6->sin6_addr.s6_addr32[0] = 0;
2468 sin6->sin6_addr.s6_addr32[1] = 0;
2469 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2470 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2473 /* Convert sockaddr_in6 into sockaddr_in. */
2475 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2477 struct sockaddr_in *sin_p;
2478 struct sockaddr_in6 sin6;
2481 * Save original sockaddr_in6 addr and convert it
2484 sin6 = *(struct sockaddr_in6 *)nam;
2485 sin_p = (struct sockaddr_in *)nam;
2486 in6_sin6_2_sin(sin_p, &sin6);
2489 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2491 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2493 struct sockaddr_in *sin_p;
2494 struct sockaddr_in6 *sin6_p;
2496 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2497 sin_p = (struct sockaddr_in *)*nam;
2498 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2499 free(*nam, M_SONAME);
2500 *nam = (struct sockaddr *)sin6_p;