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 if (ia->ia_ifa.ifa_carp)
559 (*carp_detach_p)(&ia->ia_ifa, true);
560 ifa_free(&ia->ia_ifa);
562 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
565 * this can happen when the user specify the 0 valid
571 if (cmd == ocmd && ifra->ifra_vhid > 0) {
572 if (carp_attach_p != NULL)
573 error = (*carp_attach_p)(&ia->ia_ifa,
576 error = EPROTONOSUPPORT;
584 * then, make the prefix on-link on the interface.
585 * XXX: we'd rather create the prefix before the address, but
586 * we need at least one address to install the corresponding
587 * interface route, so we configure the address first.
591 * convert mask to prefix length (prefixmask has already
592 * been validated in in6_update_ifa().
594 bzero(&pr0, sizeof(pr0));
596 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
598 if (pr0.ndpr_plen == 128) {
599 /* we don't need to install a host route. */
602 pr0.ndpr_prefix = ifra->ifra_addr;
603 /* apply the mask for safety. */
604 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
605 &ifra->ifra_prefixmask.sin6_addr);
608 * XXX: since we don't have an API to set prefix (not address)
609 * lifetimes, we just use the same lifetimes as addresses.
610 * The (temporarily) installed lifetimes can be overridden by
611 * later advertised RAs (when accept_rtadv is non 0), which is
612 * an intended behavior.
614 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
616 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
617 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
618 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
620 /* add the prefix if not yet. */
621 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
623 * nd6_prelist_add will install the corresponding
626 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
628 (*carp_detach_p)(&ia->ia_ifa, false);
633 /* relate the address to the prefix */
634 if (ia->ia6_ndpr == NULL) {
639 * If this is the first autoconf address from the
640 * prefix, create a temporary address as well
643 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
644 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
646 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
647 log(LOG_NOTICE, "in6_control: failed "
648 "to create a temporary address, "
656 * this might affect the status of autoconfigured addresses,
657 * that is, this address might make other addresses detached.
659 pfxlist_onlink_check();
663 * Try to clear the flag when a new IPv6 address is added
664 * onto an IFDISABLED interface and it succeeds.
666 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
667 struct in6_ndireq nd;
669 memset(&nd, 0, sizeof(nd));
670 nd.ndi.flags = ND_IFINFO(ifp)->flags;
671 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
672 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
673 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
674 "SIOCSIFINFO_FLAGS for -ifdisabled "
677 * Ignore failure of clearing the flag intentionally.
678 * The failure means address duplication was detected.
681 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
685 case SIOCDIFADDR_IN6:
687 struct nd_prefix *pr;
690 * If the address being deleted is the only one that owns
691 * the corresponding prefix, expire the prefix as well.
692 * XXX: theoretically, we don't have to worry about such
693 * relationship, since we separate the address management
694 * and the prefix management. We do this, however, to provide
695 * as much backward compatibility as possible in terms of
696 * the ioctl operation.
697 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
700 in6_purgeaddr(&ia->ia_ifa);
701 if (pr != NULL && pr->ndpr_addrcnt == 0) {
703 nd6_prefix_unlink(pr, NULL);
707 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
712 if (ifp->if_ioctl == NULL) {
716 error = (*ifp->if_ioctl)(ifp, cmd, data);
723 ifa_free(&ia->ia_ifa);
729 * Join necessary multicast groups. Factored out from in6_update_ifa().
730 * This entire work should only be done once, for the default FIB.
733 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
734 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
736 char ip6buf[INET6_ADDRSTRLEN];
737 struct in6_addr mltaddr;
738 struct in6_multi_mship *imm;
741 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
743 /* Join solicited multicast addr for new host id. */
744 bzero(&mltaddr, sizeof(struct in6_addr));
745 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
746 mltaddr.s6_addr32[2] = htonl(1);
747 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
748 mltaddr.s6_addr8[12] = 0xff;
749 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
750 /* XXX: should not happen */
751 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
755 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
757 * We need a random delay for DAD on the address being
758 * configured. It also means delaying transmission of the
759 * corresponding MLD report to avoid report collision.
760 * [RFC 4861, Section 6.3.7]
762 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
764 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
766 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
767 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
768 if_name(ifp), error));
771 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
772 *in6m_sol = imm->i6mm_maddr;
775 * Join link-local all-nodes address.
777 mltaddr = in6addr_linklocal_allnodes;
778 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
779 goto cleanup; /* XXX: should not fail */
781 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
783 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
784 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
785 if_name(ifp), error));
788 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
791 * Join node information group address.
794 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
796 * The spec does not say anything about delay for this group,
797 * but the same logic should apply.
799 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
801 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
803 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
806 "%s: in6_joingroup failed for %s on %s "
807 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
808 &mltaddr), if_name(ifp), error));
809 /* XXX not very fatal, go on... */
811 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
813 if (V_icmp6_nodeinfo_oldmcprefix &&
814 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
815 imm = in6_joingroup(ifp, &mltaddr, &error, delay);
818 "%s: in6_joingroup failed for %s on %s "
819 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
820 &mltaddr), if_name(ifp), error));
821 /* XXX not very fatal, go on... */
823 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
827 * Join interface-local all-nodes address.
828 * (ff01::1%ifN, and ff01::%ifN/32)
830 mltaddr = in6addr_nodelocal_allnodes;
831 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
832 goto cleanup; /* XXX: should not fail */
834 imm = in6_joingroup(ifp, &mltaddr, &error, 0);
836 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
837 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
838 &mltaddr), if_name(ifp), error));
841 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
848 * Update parameters of an IPv6 interface address.
849 * If necessary, a new entry is created and linked into address chains.
850 * This function is separated from in6_control().
853 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
854 struct in6_ifaddr *ia, int flags)
856 int error, hostIsNew = 0;
858 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
863 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
867 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
869 if (hostIsNew != 0) {
870 in6_unlink_ifa(ia, ifp);
871 ifa_free(&ia->ia_ifa);
877 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
883 * Fill in basic IPv6 address request info.
886 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
887 const struct in6_addr *mask)
890 memset(ifra, 0, sizeof(struct in6_aliasreq));
892 ifra->ifra_addr.sin6_family = AF_INET6;
893 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
895 ifra->ifra_addr.sin6_addr = *addr;
897 ifra->ifra_prefixmask.sin6_family = AF_INET6;
898 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
900 ifra->ifra_prefixmask.sin6_addr = *mask;
904 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
905 struct in6_ifaddr *ia, int flags)
908 struct sockaddr_in6 dst6;
909 struct in6_addrlifetime *lt;
910 char ip6buf[INET6_ADDRSTRLEN];
912 /* Validate parameters */
913 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
917 * The destination address for a p2p link must have a family
918 * of AF_UNSPEC or AF_INET6.
920 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
921 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
922 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
923 return (EAFNOSUPPORT);
928 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
929 ifra->ifra_addr.sin6_family != AF_INET6)
933 * validate ifra_prefixmask. don't check sin6_family, netmask
934 * does not carry fields other than sin6_len.
936 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
939 * Because the IPv6 address architecture is classless, we require
940 * users to specify a (non 0) prefix length (mask) for a new address.
941 * We also require the prefix (when specified) mask is valid, and thus
942 * reject a non-consecutive mask.
944 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
946 if (ifra->ifra_prefixmask.sin6_len != 0) {
947 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
948 (u_char *)&ifra->ifra_prefixmask +
949 ifra->ifra_prefixmask.sin6_len);
954 * In this case, ia must not be NULL. We just use its prefix
957 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
960 * If the destination address on a p2p interface is specified,
961 * and the address is a scoped one, validate/set the scope
964 dst6 = ifra->ifra_dstaddr;
965 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
966 (dst6.sin6_family == AF_INET6)) {
967 struct in6_addr in6_tmp;
970 in6_tmp = dst6.sin6_addr;
971 if (in6_setscope(&in6_tmp, ifp, &zoneid))
972 return (EINVAL); /* XXX: should be impossible */
974 if (dst6.sin6_scope_id != 0) {
975 if (dst6.sin6_scope_id != zoneid)
977 } else /* user omit to specify the ID. */
978 dst6.sin6_scope_id = zoneid;
980 /* convert into the internal form */
981 if (sa6_embedscope(&dst6, 0))
982 return (EINVAL); /* XXX: should be impossible */
984 /* Modify original ifra_dstaddr to reflect changes */
985 ifra->ifra_dstaddr = dst6;
988 * The destination address can be specified only for a p2p or a
989 * loopback interface. If specified, the corresponding prefix length
992 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
993 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
994 /* XXX: noisy message */
995 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
996 "be specified for a p2p or a loopback IF only\n"));
1000 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1001 "be 128 when dstaddr is specified\n"));
1005 /* lifetime consistency check */
1006 lt = &ifra->ifra_lifetime;
1007 if (lt->ia6t_pltime > lt->ia6t_vltime)
1009 if (lt->ia6t_vltime == 0) {
1011 * the following log might be noisy, but this is a typical
1012 * configuration mistake or a tool's bug.
1015 "in6_update_ifa: valid lifetime is 0 for %s\n",
1016 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1019 return (0); /* there's nothing to do */
1022 /* Check prefix mask */
1023 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1025 * We prohibit changing the prefix length of an existing
1027 * + such an operation should be rare in IPv6, and
1028 * + the operation would confuse prefix management.
1030 if (ia->ia_prefixmask.sin6_len != 0 &&
1031 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1032 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1033 "of an existing %s address should not be changed\n",
1034 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1045 * Allocate a new ifaddr and link it into chains.
1047 static struct in6_ifaddr *
1048 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1050 struct in6_ifaddr *ia;
1053 * When in6_alloc_ifa() is called in a process of a received
1054 * RA, it is called under an interrupt context. So, we should
1055 * call malloc with M_NOWAIT.
1057 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1060 LIST_INIT(&ia->ia6_memberships);
1061 /* Initialize the address and masks, and put time stamp */
1062 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1063 ia->ia_addr.sin6_family = AF_INET6;
1064 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1065 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1066 ia->ia_addr = ifra->ifra_addr;
1067 ia->ia6_createtime = time_uptime;
1068 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1070 * Some functions expect that ifa_dstaddr is not
1071 * NULL for p2p interfaces.
1073 ia->ia_ifa.ifa_dstaddr =
1074 (struct sockaddr *)&ia->ia_dstaddr;
1076 ia->ia_ifa.ifa_dstaddr = NULL;
1079 /* set prefix mask if any */
1080 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1081 if (ifra->ifra_prefixmask.sin6_len != 0) {
1082 ia->ia_prefixmask.sin6_family = AF_INET6;
1083 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1084 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1088 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1090 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1091 IF_ADDR_WUNLOCK(ifp);
1093 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1095 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1096 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1097 IN6_IFADDR_WUNLOCK();
1103 * Update/configure interface address parameters:
1105 * 1) Update lifetime
1106 * 2) Update interface metric ad flags
1107 * 3) Notify other subsystems
1110 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1111 struct in6_ifaddr *ia, int hostIsNew, int flags)
1115 /* update timestamp */
1116 ia->ia6_updatetime = time_uptime;
1119 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1120 * to see if the address is deprecated or invalidated, but initialize
1121 * these members for applications.
1123 ia->ia6_lifetime = ifra->ifra_lifetime;
1124 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1125 ia->ia6_lifetime.ia6t_expire =
1126 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1128 ia->ia6_lifetime.ia6t_expire = 0;
1129 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1130 ia->ia6_lifetime.ia6t_preferred =
1131 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1133 ia->ia6_lifetime.ia6t_preferred = 0;
1136 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1137 * userland, make it deprecated.
1139 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1140 ia->ia6_lifetime.ia6t_pltime = 0;
1141 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1145 * configure address flags.
1147 ia->ia6_flags = ifra->ifra_flags;
1150 * Make the address tentative before joining multicast addresses,
1151 * so that corresponding MLD responses would not have a tentative
1154 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1157 * DAD should be performed for an new address or addresses on
1158 * an interface with ND6_IFF_IFDISABLED.
1160 if (in6if_do_dad(ifp) &&
1161 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1162 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1164 /* notify other subsystems */
1165 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1171 * Do link-level ifa job:
1172 * 1) Add lle entry for added address
1173 * 2) Notifies routing socket users about new address
1174 * 3) join appropriate multicast group
1175 * 4) start DAD if enabled
1178 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1179 struct in6_ifaddr *ia, int flags)
1181 struct in6_multi *in6m_sol;
1184 /* Add local address to lltable, if necessary (ex. on p2p link). */
1185 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1186 in6_purgeaddr(&ia->ia_ifa);
1187 ifa_free(&ia->ia_ifa);
1191 /* Join necessary multicast groups. */
1193 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1194 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1196 in6_purgeaddr(&ia->ia_ifa);
1197 ifa_free(&ia->ia_ifa);
1202 /* Perform DAD, if the address is TENTATIVE. */
1203 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1204 int delay, mindelay, maxdelay;
1207 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1209 * We need to impose a delay before sending an NS
1210 * for DAD. Check if we also needed a delay for the
1211 * corresponding MLD message. If we did, the delay
1212 * should be larger than the MLD delay (this could be
1213 * relaxed a bit, but this simple logic is at least
1215 * XXX: Break data hiding guidelines and look at
1216 * state for the solicited multicast group.
1219 if (in6m_sol != NULL &&
1220 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1221 mindelay = in6m_sol->in6m_timer;
1223 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1224 if (maxdelay - mindelay == 0)
1228 (arc4random() % (maxdelay - mindelay)) +
1232 nd6_dad_start((struct ifaddr *)ia, delay);
1235 in6_newaddrmsg(ia, RTM_ADD);
1236 ifa_free(&ia->ia_ifa);
1241 in6_purgeaddr(struct ifaddr *ifa)
1243 struct ifnet *ifp = ifa->ifa_ifp;
1244 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1245 struct in6_multi_mship *imm;
1249 (*carp_detach_p)(ifa, false);
1252 * Remove the loopback route to the interface address.
1253 * The check for the current setting of "nd6_useloopback"
1256 if (ia->ia_flags & IFA_RTSELF) {
1257 error = ifa_del_loopback_route((struct ifaddr *)ia,
1258 (struct sockaddr *)&ia->ia_addr);
1260 ia->ia_flags &= ~IFA_RTSELF;
1263 /* stop DAD processing */
1266 /* Leave multicast groups. */
1267 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1268 LIST_REMOVE(imm, i6mm_chain);
1269 in6_leavegroup(imm);
1271 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1272 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1273 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1274 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1276 log(LOG_INFO, "%s: err=%d, destination address delete "
1277 "failed\n", __func__, error);
1278 ia->ia_flags &= ~IFA_ROUTE;
1281 in6_newaddrmsg(ia, RTM_DELETE);
1282 in6_unlink_ifa(ia, ifp);
1286 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1288 char ip6buf[INET6_ADDRSTRLEN];
1292 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1293 IF_ADDR_WUNLOCK(ifp);
1294 ifa_free(&ia->ia_ifa); /* if_addrhead */
1297 * Defer the release of what might be the last reference to the
1298 * in6_ifaddr so that it can't be freed before the remainder of the
1302 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1303 LIST_REMOVE(ia, ia6_hash);
1304 IN6_IFADDR_WUNLOCK();
1307 * Release the reference to the base prefix. There should be a
1308 * positive reference.
1311 if (ia->ia6_ndpr == NULL) {
1313 "in6_unlink_ifa: autoconf'ed address "
1314 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1316 ia->ia6_ndpr->ndpr_addrcnt--;
1317 /* Do not delete lles within prefix if refcont != 0 */
1318 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1320 ia->ia6_ndpr = NULL;
1323 nd6_rem_ifa_lle(ia, remove_lle);
1326 * Also, if the address being removed is autoconf'ed, call
1327 * pfxlist_onlink_check() since the release might affect the status of
1328 * other (detached) addresses.
1330 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1331 pfxlist_onlink_check();
1333 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1337 * Notifies other subsystems about address change/arrival:
1338 * 1) Notifies device handler on the first IPv6 address assignment
1339 * 2) Handle routing table changes for P2P links and route
1340 * 3) Handle routing table changes for address host route
1343 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1344 struct in6_aliasreq *ifra, int hostIsNew)
1346 int error = 0, plen, ifacount = 0;
1348 struct sockaddr_in6 *pdst;
1349 char ip6buf[INET6_ADDRSTRLEN];
1352 * Give the interface a chance to initialize
1353 * if this is its first address,
1355 if (hostIsNew != 0) {
1357 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1358 if (ifa->ifa_addr->sa_family != AF_INET6)
1362 IF_ADDR_RUNLOCK(ifp);
1365 if (ifacount <= 1 && ifp->if_ioctl) {
1366 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1372 * If a new destination address is specified, scrub the old one and
1373 * install the new destination. Note that the interface must be
1376 pdst = &ifra->ifra_dstaddr;
1377 if (pdst->sin6_family == AF_INET6 &&
1378 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1379 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1380 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1381 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1382 "remove a route to the old destination: %s\n",
1383 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1384 /* proceed anyway... */
1386 ia->ia_flags &= ~IFA_ROUTE;
1387 ia->ia_dstaddr = *pdst;
1391 * If a new destination address is specified for a point-to-point
1392 * interface, install a route to the destination as an interface
1394 * XXX: the logic below rejects assigning multiple addresses on a p2p
1395 * interface that share the same destination.
1397 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1398 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1399 ia->ia_dstaddr.sin6_family == AF_INET6) {
1400 int rtflags = RTF_UP | RTF_HOST;
1402 * Handle the case for ::1 .
1404 if (ifp->if_flags & IFF_LOOPBACK)
1405 ia->ia_flags |= IFA_RTSELF;
1406 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1409 ia->ia_flags |= IFA_ROUTE;
1413 * add a loopback route to self if not exists
1415 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1416 error = ifa_add_loopback_route((struct ifaddr *)ia,
1417 (struct sockaddr *)&ia->ia_addr);
1419 ia->ia_flags |= IFA_RTSELF;
1426 * Find an IPv6 interface link-local address specific to an interface.
1427 * ifaddr is returned referenced.
1430 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1435 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1436 if (ifa->ifa_addr->sa_family != AF_INET6)
1438 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1439 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1446 IF_ADDR_RUNLOCK(ifp);
1448 return ((struct in6_ifaddr *)ifa);
1453 * find the internet address corresponding to a given address.
1454 * ifaddr is returned referenced.
1457 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1459 struct rm_priotracker in6_ifa_tracker;
1460 struct in6_ifaddr *ia;
1462 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1463 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1464 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1466 zoneid != ia->ia_addr.sin6_scope_id)
1468 ifa_ref(&ia->ia_ifa);
1472 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1477 * find the internet address corresponding to a given interface and address.
1478 * ifaddr is returned referenced.
1481 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1486 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1487 if (ifa->ifa_addr->sa_family != AF_INET6)
1489 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1494 IF_ADDR_RUNLOCK(ifp);
1496 return ((struct in6_ifaddr *)ifa);
1500 * Find a link-local scoped address on ifp and return it if any.
1503 in6ifa_llaonifp(struct ifnet *ifp)
1505 struct sockaddr_in6 *sin6;
1508 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1511 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1512 if (ifa->ifa_addr->sa_family != AF_INET6)
1514 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1515 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1516 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1517 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1520 IF_ADDR_RUNLOCK(ifp);
1522 return ((struct in6_ifaddr *)ifa);
1526 * Convert IP6 address to printable (loggable) representation. Caller
1527 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1529 static char digits[] = "0123456789abcdef";
1531 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1533 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1535 const u_int16_t *a = (const u_int16_t *)addr;
1537 int dcolon = 0, zero = 0;
1541 for (i = 0; i < 8; i++) {
1542 if (*(a + i) == 0) {
1547 else if (maxcnt < cnt) {
1558 for (i = 0; i < 8; i++) {
1569 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1581 d = (const u_char *)a;
1582 /* Try to eliminate leading zeros in printout like in :0001. */
1584 *cp = digits[*d >> 4];
1589 *cp = digits[*d++ & 0xf];
1590 if (zero == 0 || (*cp != '0')) {
1594 *cp = digits[*d >> 4];
1595 if (zero == 0 || (*cp != '0')) {
1599 *cp++ = digits[*d & 0xf];
1608 in6_localaddr(struct in6_addr *in6)
1610 struct rm_priotracker in6_ifa_tracker;
1611 struct in6_ifaddr *ia;
1613 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1616 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1617 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1618 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1619 &ia->ia_prefixmask.sin6_addr)) {
1620 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1624 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1630 * Return 1 if an internet address is for the local host and configured
1631 * on one of its interfaces.
1634 in6_localip(struct in6_addr *in6)
1636 struct rm_priotracker in6_ifa_tracker;
1637 struct in6_ifaddr *ia;
1639 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1640 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1641 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1642 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1646 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1651 * Return 1 if an internet address is configured on an interface.
1654 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1656 struct in6_addr in6;
1658 struct in6_ifaddr *ia6;
1661 if (in6_clearscope(&in6))
1663 in6_setscope(&in6, ifp, NULL);
1666 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1667 if (ifa->ifa_addr->sa_family != AF_INET6)
1669 ia6 = (struct in6_ifaddr *)ifa;
1670 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1671 IF_ADDR_RUNLOCK(ifp);
1675 IF_ADDR_RUNLOCK(ifp);
1681 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1683 struct rm_priotracker in6_ifa_tracker;
1684 struct in6_ifaddr *ia;
1686 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1687 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1688 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1689 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1691 return (1); /* true */
1696 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1698 return (0); /* false */
1702 * return length of part which dst and src are equal
1706 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1709 u_char *s = (u_char *)src, *d = (u_char *)dst;
1710 u_char *lim = s + 16, r;
1713 if ((r = (*d++ ^ *s++)) != 0) {
1724 /* XXX: to be scope conscious */
1726 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1728 int bytelen, bitlen;
1731 if (0 > len || len > 128) {
1732 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1740 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1743 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1744 p2->s6_addr[bytelen] >> (8 - bitlen))
1751 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1753 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1754 int bytelen, bitlen, i;
1757 if (0 > len || len > 128) {
1758 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1763 bzero(maskp, sizeof(*maskp));
1766 for (i = 0; i < bytelen; i++)
1767 maskp->s6_addr[i] = 0xff;
1769 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1773 * return the best address out of the same scope. if no address was
1774 * found, return the first valid address from designated IF.
1777 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1779 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1781 struct in6_ifaddr *besta = NULL;
1782 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1784 dep[0] = dep[1] = NULL;
1787 * We first look for addresses in the same scope.
1788 * If there is one, return it.
1789 * If two or more, return one which matches the dst longest.
1790 * If none, return one of global addresses assigned other ifs.
1793 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1794 if (ifa->ifa_addr->sa_family != AF_INET6)
1796 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1797 continue; /* XXX: is there any case to allow anycast? */
1798 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1799 continue; /* don't use this interface */
1800 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1802 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1803 if (V_ip6_use_deprecated)
1804 dep[0] = (struct in6_ifaddr *)ifa;
1808 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1810 * call in6_matchlen() as few as possible
1814 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1815 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1818 besta = (struct in6_ifaddr *)ifa;
1821 besta = (struct in6_ifaddr *)ifa;
1825 ifa_ref(&besta->ia_ifa);
1826 IF_ADDR_RUNLOCK(ifp);
1830 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1831 if (ifa->ifa_addr->sa_family != AF_INET6)
1833 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1834 continue; /* XXX: is there any case to allow anycast? */
1835 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1836 continue; /* don't use this interface */
1837 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1839 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1840 if (V_ip6_use_deprecated)
1841 dep[1] = (struct in6_ifaddr *)ifa;
1847 IF_ADDR_RUNLOCK(ifp);
1848 return (struct in6_ifaddr *)ifa;
1851 /* use the last-resort values, that are, deprecated addresses */
1853 ifa_ref((struct ifaddr *)dep[0]);
1854 IF_ADDR_RUNLOCK(ifp);
1858 ifa_ref((struct ifaddr *)dep[1]);
1859 IF_ADDR_RUNLOCK(ifp);
1863 IF_ADDR_RUNLOCK(ifp);
1868 * perform DAD when interface becomes IFF_UP.
1871 in6_if_up(struct ifnet *ifp)
1874 struct in6_ifaddr *ia;
1877 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1878 if (ifa->ifa_addr->sa_family != AF_INET6)
1880 ia = (struct in6_ifaddr *)ifa;
1881 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1883 * The TENTATIVE flag was likely set by hand
1884 * beforehand, implicitly indicating the need for DAD.
1885 * We may be able to skip the random delay in this
1886 * case, but we impose delays just in case.
1889 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1892 IF_ADDR_RUNLOCK(ifp);
1895 * special cases, like 6to4, are handled in in6_ifattach
1897 in6_ifattach(ifp, NULL);
1901 in6if_do_dad(struct ifnet *ifp)
1903 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1906 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1907 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1911 * Our DAD routine requires the interface up and running.
1912 * However, some interfaces can be up before the RUNNING
1913 * status. Additionally, users may try to assign addresses
1914 * before the interface becomes up (or running).
1915 * This function returns EAGAIN in that case.
1916 * The caller should mark "tentative" on the address instead of
1917 * performing DAD immediately.
1919 if (!((ifp->if_flags & IFF_UP) &&
1920 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1927 * Calculate max IPv6 MTU through all the interfaces and store it
1933 unsigned long maxmtu = 0;
1936 IFNET_RLOCK_NOSLEEP();
1937 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1938 /* this function can be called during ifnet initialization */
1939 if (!ifp->if_afdata[AF_INET6])
1941 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1942 IN6_LINKMTU(ifp) > maxmtu)
1943 maxmtu = IN6_LINKMTU(ifp);
1945 IFNET_RUNLOCK_NOSLEEP();
1946 if (maxmtu) /* update only when maxmtu is positive */
1947 V_in6_maxmtu = maxmtu;
1951 * Provide the length of interface identifiers to be used for the link attached
1952 * to the given interface. The length should be defined in "IPv6 over
1953 * xxx-link" document. Note that address architecture might also define
1954 * the length for a particular set of address prefixes, regardless of the
1955 * link type. As clarified in rfc2462bis, those two definitions should be
1956 * consistent, and those really are as of August 2004.
1959 in6_if2idlen(struct ifnet *ifp)
1961 switch (ifp->if_type) {
1962 case IFT_ETHER: /* RFC2464 */
1963 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
1964 case IFT_L2VLAN: /* ditto */
1965 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
1966 case IFT_INFINIBAND:
1968 case IFT_FDDI: /* RFC2467 */
1970 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
1972 case IFT_PPP: /* RFC2472 */
1974 case IFT_ARCNET: /* RFC2497 */
1976 case IFT_FRELAY: /* RFC2590 */
1978 case IFT_IEEE1394: /* RFC3146 */
1981 return (64); /* draft-ietf-v6ops-mech-v2-07 */
1983 return (64); /* XXX: is this really correct? */
1986 * Unknown link type:
1987 * It might be controversial to use the today's common constant
1988 * of 64 for these cases unconditionally. For full compliance,
1989 * we should return an error in this case. On the other hand,
1990 * if we simply miss the standard for the link type or a new
1991 * standard is defined for a new link type, the IFID length
1992 * is very likely to be the common constant. As a compromise,
1993 * we always use the constant, but make an explicit notice
1994 * indicating the "unknown" case.
1996 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2001 #include <sys/sysctl.h>
2003 struct in6_llentry {
2004 struct llentry base;
2007 #define IN6_LLTBL_DEFAULT_HSIZE 32
2008 #define IN6_LLTBL_HASH(k, h) \
2009 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2012 * Do actual deallocation of @lle.
2015 in6_lltable_destroy_lle_unlocked(struct llentry *lle)
2018 LLE_LOCK_DESTROY(lle);
2019 LLE_REQ_DESTROY(lle);
2020 free(lle, M_LLTABLE);
2024 * Called by LLE_FREE_LOCKED when number of references
2028 in6_lltable_destroy_lle(struct llentry *lle)
2032 in6_lltable_destroy_lle_unlocked(lle);
2035 static struct llentry *
2036 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2038 struct in6_llentry *lle;
2040 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2041 if (lle == NULL) /* NB: caller generates msg */
2044 lle->base.r_l3addr.addr6 = *addr6;
2045 lle->base.lle_refcnt = 1;
2046 lle->base.lle_free = in6_lltable_destroy_lle;
2047 LLE_LOCK_INIT(&lle->base);
2048 LLE_REQ_INIT(&lle->base);
2049 callout_init(&lle->base.lle_timer, 1);
2051 return (&lle->base);
2055 in6_lltable_match_prefix(const struct sockaddr *saddr,
2056 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2058 const struct in6_addr *addr, *mask, *lle_addr;
2060 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2061 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2062 lle_addr = &lle->r_l3addr.addr6;
2064 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2067 if (lle->la_flags & LLE_IFADDR) {
2070 * Delete LLE_IFADDR records IFF address & flag matches.
2071 * Note that addr is the interface address within prefix
2074 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2075 (flags & LLE_STATIC) != 0)
2080 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2081 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2088 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2092 LLE_WLOCK_ASSERT(lle);
2093 KASSERT(llt != NULL, ("lltable is NULL"));
2095 /* Unlink entry from table */
2096 if ((lle->la_flags & LLE_LINKED) != 0) {
2099 IF_AFDATA_WLOCK_ASSERT(ifp);
2100 lltable_unlink_entry(llt, lle);
2103 if (callout_stop(&lle->lle_timer) > 0)
2110 in6_lltable_rtcheck(struct ifnet *ifp,
2112 const struct sockaddr *l3addr)
2114 const struct sockaddr_in6 *sin6;
2115 struct nhop6_basic nh6;
2116 struct in6_addr dst;
2119 char ip6buf[INET6_ADDRSTRLEN];
2121 KASSERT(l3addr->sa_family == AF_INET6,
2122 ("sin_family %d", l3addr->sa_family));
2124 /* Our local addresses are always only installed on the default FIB. */
2126 sin6 = (const struct sockaddr_in6 *)l3addr;
2127 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2128 error = fib6_lookup_nh_basic(RT_DEFAULT_FIB, &dst, scopeid, 0, 0, &nh6);
2129 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2132 * Create an ND6 cache for an IPv6 neighbor
2133 * that is not covered by our own prefix.
2135 ifa = ifaof_ifpforaddr(l3addr, ifp);
2140 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2141 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2147 static inline uint32_t
2148 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2151 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2155 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2158 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2162 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2164 struct sockaddr_in6 *sin6;
2166 sin6 = (struct sockaddr_in6 *)sa;
2167 bzero(sin6, sizeof(*sin6));
2168 sin6->sin6_family = AF_INET6;
2169 sin6->sin6_len = sizeof(*sin6);
2170 sin6->sin6_addr = lle->r_l3addr.addr6;
2173 static inline struct llentry *
2174 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2176 struct llentry *lle;
2177 struct llentries *lleh;
2180 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2181 lleh = &llt->lle_head[hashidx];
2182 LIST_FOREACH(lle, lleh, lle_next) {
2183 if (lle->la_flags & LLE_DELETED)
2185 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2193 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2196 lle->la_flags |= LLE_DELETED;
2197 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2199 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2204 static struct llentry *
2205 in6_lltable_alloc(struct lltable *llt, u_int flags,
2206 const struct sockaddr *l3addr)
2208 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2209 struct ifnet *ifp = llt->llt_ifp;
2210 struct llentry *lle;
2211 char linkhdr[LLE_MAX_LINKHDR];
2215 KASSERT(l3addr->sa_family == AF_INET6,
2216 ("sin_family %d", l3addr->sa_family));
2219 * A route that covers the given address must have
2220 * been installed 1st because we are doing a resolution,
2223 if (!(flags & LLE_IFADDR) &&
2224 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2227 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2229 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2232 lle->la_flags = flags;
2233 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2234 linkhdrsize = LLE_MAX_LINKHDR;
2235 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2236 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2237 in6_lltable_destroy_lle_unlocked(lle);
2240 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2242 lle->la_flags |= LLE_STATIC;
2245 if ((lle->la_flags & LLE_STATIC) != 0)
2246 lle->ln_state = ND6_LLINFO_REACHABLE;
2251 static struct llentry *
2252 in6_lltable_lookup(struct lltable *llt, u_int flags,
2253 const struct sockaddr *l3addr)
2255 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2256 struct llentry *lle;
2258 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2259 KASSERT(l3addr->sa_family == AF_INET6,
2260 ("sin_family %d", l3addr->sa_family));
2262 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2267 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) !=
2268 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X",
2271 if (flags & LLE_UNLOCKED)
2274 if (flags & LLE_EXCLUSIVE)
2282 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2283 struct sysctl_req *wr)
2285 struct ifnet *ifp = llt->llt_ifp;
2288 struct rt_msghdr rtm;
2289 struct sockaddr_in6 sin6;
2291 * ndp.c assumes that sdl is word aligned
2296 struct sockaddr_dl sdl;
2298 struct sockaddr_dl *sdl;
2301 bzero(&ndpc, sizeof(ndpc));
2302 /* skip deleted entries */
2303 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2305 /* Skip if jailed and not a valid IP of the prison. */
2306 lltable_fill_sa_entry(lle,
2307 (struct sockaddr *)&ndpc.sin6);
2308 if (prison_if(wr->td->td_ucred,
2309 (struct sockaddr *)&ndpc.sin6) != 0)
2312 * produce a msg made of:
2314 * struct sockaddr_in6 (IPv6)
2315 * struct sockaddr_dl;
2317 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2318 ndpc.rtm.rtm_version = RTM_VERSION;
2319 ndpc.rtm.rtm_type = RTM_GET;
2320 ndpc.rtm.rtm_flags = RTF_UP;
2321 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2322 if (V_deembed_scopeid)
2323 sa6_recoverscope(&ndpc.sin6);
2326 if (lle->la_flags & LLE_PUB)
2327 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2330 sdl->sdl_family = AF_LINK;
2331 sdl->sdl_len = sizeof(*sdl);
2332 sdl->sdl_index = ifp->if_index;
2333 sdl->sdl_type = ifp->if_type;
2334 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2335 sdl->sdl_alen = ifp->if_addrlen;
2336 bcopy(lle->ll_addr, LLADDR(sdl),
2340 bzero(LLADDR(sdl), ifp->if_addrlen);
2342 if (lle->la_expire != 0)
2343 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2344 lle->lle_remtime / hz +
2345 time_second - time_uptime;
2346 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2347 if (lle->la_flags & LLE_STATIC)
2348 ndpc.rtm.rtm_flags |= RTF_STATIC;
2349 if (lle->la_flags & LLE_IFADDR)
2350 ndpc.rtm.rtm_flags |= RTF_PINNED;
2351 if (lle->ln_router != 0)
2352 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2353 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2354 /* Store state in rmx_weight value */
2355 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2356 ndpc.rtm.rtm_index = ifp->if_index;
2357 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2362 static struct lltable *
2363 in6_lltattach(struct ifnet *ifp)
2365 struct lltable *llt;
2367 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2368 llt->llt_af = AF_INET6;
2371 llt->llt_lookup = in6_lltable_lookup;
2372 llt->llt_alloc_entry = in6_lltable_alloc;
2373 llt->llt_delete_entry = in6_lltable_delete_entry;
2374 llt->llt_dump_entry = in6_lltable_dump_entry;
2375 llt->llt_hash = in6_lltable_hash;
2376 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2377 llt->llt_free_entry = in6_lltable_free_entry;
2378 llt->llt_match_prefix = in6_lltable_match_prefix;
2385 in6_domifattach(struct ifnet *ifp)
2387 struct in6_ifextra *ext;
2389 /* There are not IPv6-capable interfaces. */
2390 switch (ifp->if_type) {
2396 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2397 bzero(ext, sizeof(*ext));
2399 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2400 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2401 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2402 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2404 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2405 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2407 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2408 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2410 ext->nd_ifinfo = nd6_ifattach(ifp);
2411 ext->scope6_id = scope6_ifattach(ifp);
2412 ext->lltable = in6_lltattach(ifp);
2414 ext->mld_ifinfo = mld_domifattach(ifp);
2420 in6_domifmtu(struct ifnet *ifp)
2422 if (ifp->if_afdata[AF_INET6] == NULL)
2425 return (IN6_LINKMTU(ifp));
2429 in6_domifdetach(struct ifnet *ifp, void *aux)
2431 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2433 mld_domifdetach(ifp);
2434 scope6_ifdetach(ext->scope6_id);
2435 nd6_ifdetach(ifp, ext->nd_ifinfo);
2436 lltable_free(ext->lltable);
2437 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2438 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2439 free(ext->in6_ifstat, M_IFADDR);
2440 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2441 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2442 free(ext->icmp6_ifstat, M_IFADDR);
2443 free(ext, M_IFADDR);
2447 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2448 * v4 mapped addr or v4 compat addr
2451 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2454 bzero(sin, sizeof(*sin));
2455 sin->sin_len = sizeof(struct sockaddr_in);
2456 sin->sin_family = AF_INET;
2457 sin->sin_port = sin6->sin6_port;
2458 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2461 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2463 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2465 bzero(sin6, sizeof(*sin6));
2466 sin6->sin6_len = sizeof(struct sockaddr_in6);
2467 sin6->sin6_family = AF_INET6;
2468 sin6->sin6_port = sin->sin_port;
2469 sin6->sin6_addr.s6_addr32[0] = 0;
2470 sin6->sin6_addr.s6_addr32[1] = 0;
2471 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2472 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2475 /* Convert sockaddr_in6 into sockaddr_in. */
2477 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2479 struct sockaddr_in *sin_p;
2480 struct sockaddr_in6 sin6;
2483 * Save original sockaddr_in6 addr and convert it
2486 sin6 = *(struct sockaddr_in6 *)nam;
2487 sin_p = (struct sockaddr_in *)nam;
2488 in6_sin6_2_sin(sin_p, &sin6);
2491 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2493 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2495 struct sockaddr_in *sin_p;
2496 struct sockaddr_in6 *sin6_p;
2498 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2499 sin_p = (struct sockaddr_in *)*nam;
2500 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2501 free(*nam, M_SONAME);
2502 *nam = (struct sockaddr *)sin6_p;