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/errno.h>
73 #include <sys/malloc.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/sockio.h>
77 #include <sys/systm.h>
81 #include <sys/kernel.h>
82 #include <sys/syslog.h>
85 #include <net/if_var.h>
86 #include <net/if_types.h>
87 #include <net/route.h>
88 #include <net/if_dl.h>
91 #include <netinet/in.h>
92 #include <netinet/in_var.h>
93 #include <net/if_llatbl.h>
94 #include <netinet/if_ether.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/ip.h>
97 #include <netinet/in_pcb.h>
99 #include <netinet/ip6.h>
100 #include <netinet6/ip6_var.h>
101 #include <netinet6/nd6.h>
102 #include <netinet6/mld6_var.h>
103 #include <netinet6/ip6_mroute.h>
104 #include <netinet6/in6_ifattach.h>
105 #include <netinet6/scope6_var.h>
106 #include <netinet6/in6_pcb.h>
109 * Definitions of some costant IP6 addresses.
111 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
112 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
113 const struct in6_addr in6addr_nodelocal_allnodes =
114 IN6ADDR_NODELOCAL_ALLNODES_INIT;
115 const struct in6_addr in6addr_linklocal_allnodes =
116 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
117 const struct in6_addr in6addr_linklocal_allrouters =
118 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
119 const struct in6_addr in6addr_linklocal_allv2routers =
120 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
122 const struct in6_addr in6mask0 = IN6MASK0;
123 const struct in6_addr in6mask32 = IN6MASK32;
124 const struct in6_addr in6mask64 = IN6MASK64;
125 const struct in6_addr in6mask96 = IN6MASK96;
126 const struct in6_addr in6mask128 = IN6MASK128;
128 const struct sockaddr_in6 sa6_any =
129 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
131 static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
132 struct ifnet *, struct thread *));
133 static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *,
134 struct sockaddr_in6 *, int));
135 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
137 int (*faithprefix_p)(struct in6_addr *);
142 in6_mask2len(struct in6_addr *mask, u_char *lim0)
145 u_char *lim = lim0, *p;
147 /* ignore the scope_id part */
148 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
149 lim = (u_char *)mask + sizeof(*mask);
150 for (p = (u_char *)mask; p < lim; x++, p++) {
156 for (y = 0; y < 8; y++) {
157 if ((*p & (0x80 >> y)) == 0)
163 * when the limit pointer is given, do a stricter check on the
167 if (y != 0 && (*p & (0x00ff >> y)) != 0)
169 for (p = p + 1; p < lim; p++)
177 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
178 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
180 #ifdef COMPAT_FREEBSD32
181 struct in6_ndifreq32 {
182 char ifname[IFNAMSIZ];
185 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
189 in6_control(struct socket *so, u_long cmd, caddr_t data,
190 struct ifnet *ifp, struct thread *td)
192 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
193 struct in6_ifaddr *ia = NULL;
194 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
195 struct sockaddr_in6 *sa6;
199 case SIOCGETSGCNT_IN6:
200 case SIOCGETMIFCNT_IN6:
201 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
205 case SIOCAADDRCTL_POLICY:
206 case SIOCDADDRCTL_POLICY:
208 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
212 return (in6_src_ioctl(cmd, data));
219 case SIOCSNDFLUSH_IN6:
220 case SIOCSPFXFLUSH_IN6:
221 case SIOCSRTRFLUSH_IN6:
222 case SIOCSDEFIFACE_IN6:
223 case SIOCSIFINFO_FLAGS:
224 case SIOCSIFINFO_IN6:
226 error = priv_check(td, PRIV_NETINET_ND6);
231 case OSIOCGIFINFO_IN6:
232 case SIOCGIFINFO_IN6:
235 case SIOCGNBRINFO_IN6:
236 case SIOCGDEFIFACE_IN6:
237 return (nd6_ioctl(cmd, data, ifp));
239 #ifdef COMPAT_FREEBSD32
240 case SIOCGDEFIFACE32_IN6:
242 struct in6_ndifreq ndif;
243 struct in6_ndifreq32 *ndif32;
245 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
249 ndif32 = (struct in6_ndifreq32 *)data;
250 ndif32->ifindex = ndif.ifindex;
257 case SIOCSIFPREFIX_IN6:
258 case SIOCDIFPREFIX_IN6:
259 case SIOCAIFPREFIX_IN6:
260 case SIOCCIFPREFIX_IN6:
261 case SIOCSGIFPREFIX_IN6:
262 case SIOCGIFPREFIX_IN6:
264 "prefix ioctls are now invalidated. "
265 "please use ifconfig.\n");
272 error = priv_check(td, PRIV_NETINET_SCOPE6);
276 return (scope6_set(ifp,
277 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
279 return (scope6_get(ifp,
280 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
282 return (scope6_get_default((struct scope6_id *)
283 ifr->ifr_ifru.ifru_scope_id));
289 error = priv_check(td, PRIV_NET_ADDIFADDR);
293 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
297 error = priv_check(td, PRIV_NET_DELIFADDR);
303 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
307 * Find address for this interface, if it exists.
309 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
310 * only, and used the first interface address as the target of other
311 * operations (without checking ifra_addr). This was because netinet
312 * code/API assumed at most 1 interface address per interface.
313 * Since IPv6 allows a node to assign multiple addresses
314 * on a single interface, we almost always look and check the
315 * presence of ifra_addr, and reject invalid ones here.
316 * It also decreases duplicated code among SIOC*_IN6 operations.
319 case SIOCAIFADDR_IN6:
320 case SIOCSIFPHYADDR_IN6:
321 sa6 = &ifra->ifra_addr;
323 case SIOCSIFADDR_IN6:
324 case SIOCGIFADDR_IN6:
325 case SIOCSIFDSTADDR_IN6:
326 case SIOCSIFNETMASK_IN6:
327 case SIOCGIFDSTADDR_IN6:
328 case SIOCGIFNETMASK_IN6:
329 case SIOCDIFADDR_IN6:
330 case SIOCGIFPSRCADDR_IN6:
331 case SIOCGIFPDSTADDR_IN6:
332 case SIOCGIFAFLAG_IN6:
333 case SIOCSNDFLUSH_IN6:
334 case SIOCSPFXFLUSH_IN6:
335 case SIOCSRTRFLUSH_IN6:
336 case SIOCGIFALIFETIME_IN6:
337 case SIOCSIFALIFETIME_IN6:
338 case SIOCGIFSTAT_IN6:
339 case SIOCGIFSTAT_ICMP6:
340 sa6 = &ifr->ifr_addr;
346 if (sa6 && sa6->sin6_family == AF_INET6) {
347 if (sa6->sin6_scope_id != 0)
348 error = sa6_embedscope(sa6, 0);
350 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
353 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
354 &sa6->sin6_addr)) != 0)
356 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
361 case SIOCSIFADDR_IN6:
362 case SIOCSIFDSTADDR_IN6:
363 case SIOCSIFNETMASK_IN6:
365 * Since IPv6 allows a node to assign multiple addresses
366 * on a single interface, SIOCSIFxxx ioctls are deprecated.
368 /* we decided to obsolete this command (20000704) */
372 case SIOCDIFADDR_IN6:
374 * for IPv4, we look for existing in_ifaddr here to allow
375 * "ifconfig if0 delete" to remove the first IPv4 address on
376 * the interface. For IPv6, as the spec allows multiple
377 * interface address from the day one, we consider "remove the
378 * first one" semantics to be not preferable.
381 error = EADDRNOTAVAIL;
385 case SIOCAIFADDR_IN6:
387 * We always require users to specify a valid IPv6 address for
388 * the corresponding operation.
390 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
391 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
392 error = EAFNOSUPPORT;
397 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
398 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
404 case SIOCGIFADDR_IN6:
405 /* This interface is basically deprecated. use SIOCGIFCONF. */
407 case SIOCGIFAFLAG_IN6:
408 case SIOCGIFNETMASK_IN6:
409 case SIOCGIFDSTADDR_IN6:
410 case SIOCGIFALIFETIME_IN6:
411 /* must think again about its semantics */
413 error = EADDRNOTAVAIL;
418 case SIOCSIFALIFETIME_IN6:
420 struct in6_addrlifetime *lt;
423 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
428 error = EADDRNOTAVAIL;
431 /* sanity for overflow - beware unsigned */
432 lt = &ifr->ifr_ifru.ifru_lifetime;
433 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
434 lt->ia6t_vltime + time_second < time_second) {
438 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
439 lt->ia6t_pltime + time_second < time_second) {
448 case SIOCGIFADDR_IN6:
449 ifr->ifr_addr = ia->ia_addr;
450 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
454 case SIOCGIFDSTADDR_IN6:
455 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
460 * XXX: should we check if ifa_dstaddr is NULL and return
463 ifr->ifr_dstaddr = ia->ia_dstaddr;
464 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
468 case SIOCGIFNETMASK_IN6:
469 ifr->ifr_addr = ia->ia_prefixmask;
472 case SIOCGIFAFLAG_IN6:
473 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
476 case SIOCGIFSTAT_IN6:
481 bzero(&ifr->ifr_ifru.ifru_stat,
482 sizeof(ifr->ifr_ifru.ifru_stat));
483 ifr->ifr_ifru.ifru_stat =
484 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
487 case SIOCGIFSTAT_ICMP6:
492 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
493 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
494 ifr->ifr_ifru.ifru_icmp6stat =
495 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
498 case SIOCGIFALIFETIME_IN6:
499 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
500 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
502 struct in6_addrlifetime *retlt =
503 &ifr->ifr_ifru.ifru_lifetime;
506 * XXX: adjust expiration time assuming time_t is
510 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
511 if (ia->ia6_lifetime.ia6t_vltime <
512 maxexpire - ia->ia6_updatetime) {
513 retlt->ia6t_expire = ia->ia6_updatetime +
514 ia->ia6_lifetime.ia6t_vltime;
516 retlt->ia6t_expire = maxexpire;
518 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
520 struct in6_addrlifetime *retlt =
521 &ifr->ifr_ifru.ifru_lifetime;
524 * XXX: adjust expiration time assuming time_t is
528 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
529 if (ia->ia6_lifetime.ia6t_pltime <
530 maxexpire - ia->ia6_updatetime) {
531 retlt->ia6t_preferred = ia->ia6_updatetime +
532 ia->ia6_lifetime.ia6t_pltime;
534 retlt->ia6t_preferred = maxexpire;
538 case SIOCSIFALIFETIME_IN6:
539 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
541 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
542 ia->ia6_lifetime.ia6t_expire =
543 time_second + ia->ia6_lifetime.ia6t_vltime;
545 ia->ia6_lifetime.ia6t_expire = 0;
546 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
547 ia->ia6_lifetime.ia6t_preferred =
548 time_second + ia->ia6_lifetime.ia6t_pltime;
550 ia->ia6_lifetime.ia6t_preferred = 0;
553 case SIOCAIFADDR_IN6:
556 struct nd_prefixctl pr0;
557 struct nd_prefix *pr;
560 * first, make or update the interface address structure,
561 * and link it to the list.
563 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
566 ifa_free(&ia->ia_ifa);
567 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
570 * this can happen when the user specify the 0 valid
577 * then, make the prefix on-link on the interface.
578 * XXX: we'd rather create the prefix before the address, but
579 * we need at least one address to install the corresponding
580 * interface route, so we configure the address first.
584 * convert mask to prefix length (prefixmask has already
585 * been validated in in6_update_ifa().
587 bzero(&pr0, sizeof(pr0));
589 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
591 if (pr0.ndpr_plen == 128) {
592 break; /* we don't need to install a host route. */
594 pr0.ndpr_prefix = ifra->ifra_addr;
595 /* apply the mask for safety. */
596 for (i = 0; i < 4; i++) {
597 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
598 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
601 * XXX: since we don't have an API to set prefix (not address)
602 * lifetimes, we just use the same lifetimes as addresses.
603 * The (temporarily) installed lifetimes can be overridden by
604 * later advertised RAs (when accept_rtadv is non 0), which is
605 * an intended behavior.
607 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
609 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
610 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
611 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
613 /* add the prefix if not yet. */
614 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
616 * nd6_prelist_add will install the corresponding
619 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
622 log(LOG_ERR, "nd6_prelist_add succeeded but "
629 /* relate the address to the prefix */
630 if (ia->ia6_ndpr == NULL) {
635 * If this is the first autoconf address from the
636 * prefix, create a temporary address as well
639 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
640 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
642 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
643 log(LOG_NOTICE, "in6_control: failed "
644 "to create a temporary address, "
651 * this might affect the status of autoconfigured addresses,
652 * that is, this address might make other addresses detached.
654 pfxlist_onlink_check();
655 if (error == 0 && ia) {
656 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
658 * Try to clear the flag when a new
659 * IPv6 address is added onto an
660 * IFDISABLED interface and it
663 struct in6_ndireq nd;
665 memset(&nd, 0, sizeof(nd));
666 nd.ndi.flags = ND_IFINFO(ifp)->flags;
667 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
668 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
669 (caddr_t)&nd, ifp) < 0)
670 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
671 "SIOCSIFINFO_FLAGS for -ifdisabled "
674 * Ignore failure of clearing the flag
675 * intentionally. The failure means
676 * address duplication was detected.
679 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
684 case SIOCDIFADDR_IN6:
686 struct nd_prefix *pr;
689 * If the address being deleted is the only one that owns
690 * the corresponding prefix, expire the prefix as well.
691 * XXX: theoretically, we don't have to worry about such
692 * relationship, since we separate the address management
693 * and the prefix management. We do this, however, to provide
694 * as much backward compatibility as possible in terms of
695 * the ioctl operation.
696 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
699 in6_purgeaddr(&ia->ia_ifa);
700 if (pr && pr->ndpr_refcnt == 0)
702 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
707 if (ifp == NULL || ifp->if_ioctl == 0) {
711 error = (*ifp->if_ioctl)(ifp, cmd, data);
718 ifa_free(&ia->ia_ifa);
723 * Update parameters of an IPv6 interface address.
724 * If necessary, a new entry is created and linked into address chains.
725 * This function is separated from in6_control().
726 * XXX: should this be performed under splnet()?
729 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
730 struct in6_ifaddr *ia, int flags)
732 int error = 0, hostIsNew = 0, plen = -1;
733 struct sockaddr_in6 dst6;
734 struct in6_addrlifetime *lt;
735 struct in6_multi_mship *imm;
736 struct in6_multi *in6m_sol;
739 char ip6buf[INET6_ADDRSTRLEN];
741 /* Validate parameters */
742 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
746 * The destination address for a p2p link must have a family
747 * of AF_UNSPEC or AF_INET6.
749 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
750 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
751 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
752 return (EAFNOSUPPORT);
754 * validate ifra_prefixmask. don't check sin6_family, netmask
755 * does not carry fields other than sin6_len.
757 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
760 * Because the IPv6 address architecture is classless, we require
761 * users to specify a (non 0) prefix length (mask) for a new address.
762 * We also require the prefix (when specified) mask is valid, and thus
763 * reject a non-consecutive mask.
765 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
767 if (ifra->ifra_prefixmask.sin6_len != 0) {
768 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
769 (u_char *)&ifra->ifra_prefixmask +
770 ifra->ifra_prefixmask.sin6_len);
775 * In this case, ia must not be NULL. We just use its prefix
778 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
781 * If the destination address on a p2p interface is specified,
782 * and the address is a scoped one, validate/set the scope
785 dst6 = ifra->ifra_dstaddr;
786 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
787 (dst6.sin6_family == AF_INET6)) {
788 struct in6_addr in6_tmp;
791 in6_tmp = dst6.sin6_addr;
792 if (in6_setscope(&in6_tmp, ifp, &zoneid))
793 return (EINVAL); /* XXX: should be impossible */
795 if (dst6.sin6_scope_id != 0) {
796 if (dst6.sin6_scope_id != zoneid)
798 } else /* user omit to specify the ID. */
799 dst6.sin6_scope_id = zoneid;
801 /* convert into the internal form */
802 if (sa6_embedscope(&dst6, 0))
803 return (EINVAL); /* XXX: should be impossible */
806 * The destination address can be specified only for a p2p or a
807 * loopback interface. If specified, the corresponding prefix length
810 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
811 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
812 /* XXX: noisy message */
813 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
814 "be specified for a p2p or a loopback IF only\n"));
818 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
819 "be 128 when dstaddr is specified\n"));
823 /* lifetime consistency check */
824 lt = &ifra->ifra_lifetime;
825 if (lt->ia6t_pltime > lt->ia6t_vltime)
827 if (lt->ia6t_vltime == 0) {
829 * the following log might be noisy, but this is a typical
830 * configuration mistake or a tool's bug.
833 "in6_update_ifa: valid lifetime is 0 for %s\n",
834 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
837 return (0); /* there's nothing to do */
841 * If this is a new address, allocate a new ifaddr and link it
847 * When in6_update_ifa() is called in a process of a received
848 * RA, it is called under an interrupt context. So, we should
849 * call malloc with M_NOWAIT.
851 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
855 bzero((caddr_t)ia, sizeof(*ia));
856 ifa_init(&ia->ia_ifa);
857 LIST_INIT(&ia->ia6_memberships);
858 /* Initialize the address and masks, and put time stamp */
859 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
860 ia->ia_addr.sin6_family = AF_INET6;
861 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
862 ia->ia6_createtime = time_second;
863 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
865 * XXX: some functions expect that ifa_dstaddr is not
866 * NULL for p2p interfaces.
868 ia->ia_ifa.ifa_dstaddr =
869 (struct sockaddr *)&ia->ia_dstaddr;
871 ia->ia_ifa.ifa_dstaddr = NULL;
873 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
875 ifa_ref(&ia->ia_ifa); /* if_addrhead */
877 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
880 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
882 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
883 IN6_IFADDR_WUNLOCK();
886 /* update timestamp */
887 ia->ia6_updatetime = time_second;
889 /* set prefix mask */
890 if (ifra->ifra_prefixmask.sin6_len) {
892 * We prohibit changing the prefix length of an existing
894 * + such an operation should be rare in IPv6, and
895 * + the operation would confuse prefix management.
897 if (ia->ia_prefixmask.sin6_len &&
898 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
899 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
900 " existing (%s) address should not be changed\n",
901 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
905 ia->ia_prefixmask = ifra->ifra_prefixmask;
909 * If a new destination address is specified, scrub the old one and
910 * install the new destination. Note that the interface must be
911 * p2p or loopback (see the check above.)
913 if (dst6.sin6_family == AF_INET6 &&
914 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
917 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
918 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
919 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
920 "a route to the old destination: %s\n",
921 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
922 /* proceed anyway... */
924 ia->ia_flags &= ~IFA_ROUTE;
925 ia->ia_dstaddr = dst6;
929 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
930 * to see if the address is deprecated or invalidated, but initialize
931 * these members for applications.
933 ia->ia6_lifetime = ifra->ifra_lifetime;
934 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
935 ia->ia6_lifetime.ia6t_expire =
936 time_second + ia->ia6_lifetime.ia6t_vltime;
938 ia->ia6_lifetime.ia6t_expire = 0;
939 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
940 ia->ia6_lifetime.ia6t_preferred =
941 time_second + ia->ia6_lifetime.ia6t_pltime;
943 ia->ia6_lifetime.ia6t_preferred = 0;
945 /* reset the interface and routing table appropriately. */
946 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
950 * configure address flags.
952 ia->ia6_flags = ifra->ifra_flags;
954 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
955 * userland, make it deprecated.
957 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
958 ia->ia6_lifetime.ia6t_pltime = 0;
959 ia->ia6_lifetime.ia6t_preferred = time_second;
962 * Make the address tentative before joining multicast addresses,
963 * so that corresponding MLD responses would not have a tentative
966 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
967 if (hostIsNew && in6if_do_dad(ifp))
968 ia->ia6_flags |= IN6_IFF_TENTATIVE;
970 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
971 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
972 ia->ia6_flags |= IN6_IFF_TENTATIVE;
975 * We are done if we have simply modified an existing address.
981 * Beyond this point, we should call in6_purgeaddr upon an error,
982 * not just go to unlink.
985 /* Join necessary multicast groups */
987 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
988 struct sockaddr_in6 mltaddr, mltmask;
989 struct in6_addr llsol;
991 /* join solicited multicast addr for new host id */
992 bzero(&llsol, sizeof(struct in6_addr));
993 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
994 llsol.s6_addr32[1] = 0;
995 llsol.s6_addr32[2] = htonl(1);
996 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
997 llsol.s6_addr8[12] = 0xff;
998 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
999 /* XXX: should not happen */
1000 log(LOG_ERR, "in6_update_ifa: "
1001 "in6_setscope failed\n");
1005 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1007 * We need a random delay for DAD on the address
1008 * being configured. It also means delaying
1009 * transmission of the corresponding MLD report to
1010 * avoid report collision.
1011 * [RFC 4861, Section 6.3.7]
1013 delay = arc4random() %
1014 (MAX_RTR_SOLICITATION_DELAY * hz);
1016 imm = in6_joingroup(ifp, &llsol, &error, delay);
1018 nd6log((LOG_WARNING,
1019 "in6_update_ifa: addmulti failed for "
1020 "%s on %s (errno=%d)\n",
1021 ip6_sprintf(ip6buf, &llsol), if_name(ifp),
1025 LIST_INSERT_HEAD(&ia->ia6_memberships,
1027 in6m_sol = imm->i6mm_maddr;
1029 bzero(&mltmask, sizeof(mltmask));
1030 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1031 mltmask.sin6_family = AF_INET6;
1032 mltmask.sin6_addr = in6mask32;
1033 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
1036 * join link-local all-nodes address
1038 bzero(&mltaddr, sizeof(mltaddr));
1039 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1040 mltaddr.sin6_family = AF_INET6;
1041 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1042 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1044 goto cleanup; /* XXX: should not fail */
1047 * XXX: do we really need this automatic routes?
1048 * We should probably reconsider this stuff. Most applications
1049 * actually do not need the routes, since they usually specify
1050 * the outgoing interface.
1052 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1054 /* XXX: only works in !SCOPEDROUTING case. */
1055 if (memcmp(&mltaddr.sin6_addr,
1056 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
1063 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
1064 (struct sockaddr *)&ia->ia_addr,
1065 (struct sockaddr *)&mltmask, RTF_UP,
1066 (struct rtentry **)0);
1073 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
1075 nd6log((LOG_WARNING,
1076 "in6_update_ifa: addmulti failed for "
1077 "%s on %s (errno=%d)\n",
1078 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1079 if_name(ifp), error));
1082 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1085 * join node information group address
1088 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1090 * The spec doesn't say anything about delay for this
1091 * group, but the same logic should apply.
1093 delay = arc4random() %
1094 (MAX_RTR_SOLICITATION_DELAY * hz);
1096 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
1097 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error,
1098 delay); /* XXX jinmei */
1100 nd6log((LOG_WARNING, "in6_update_ifa: "
1101 "addmulti failed for %s on %s "
1103 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1104 if_name(ifp), error));
1105 /* XXX not very fatal, go on... */
1107 LIST_INSERT_HEAD(&ia->ia6_memberships,
1113 * join interface-local all-nodes address.
1114 * (ff01::1%ifN, and ff01::%ifN/32)
1116 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1117 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL))
1119 goto cleanup; /* XXX: should not fail */
1120 /* XXX: again, do we really need the route? */
1121 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1123 if (memcmp(&mltaddr.sin6_addr,
1124 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
1131 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
1132 (struct sockaddr *)&ia->ia_addr,
1133 (struct sockaddr *)&mltmask, RTF_UP,
1134 (struct rtentry **)0);
1140 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
1142 nd6log((LOG_WARNING, "in6_update_ifa: "
1143 "addmulti failed for %s on %s "
1145 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1146 if_name(ifp), error));
1149 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1154 * Perform DAD, if needed.
1155 * XXX It may be of use, if we can administratively
1158 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1159 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1161 int mindelay, maxdelay;
1164 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1166 * We need to impose a delay before sending an NS
1167 * for DAD. Check if we also needed a delay for the
1168 * corresponding MLD message. If we did, the delay
1169 * should be larger than the MLD delay (this could be
1170 * relaxed a bit, but this simple logic is at least
1172 * XXX: Break data hiding guidelines and look at
1173 * state for the solicited multicast group.
1176 if (in6m_sol != NULL &&
1177 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1178 mindelay = in6m_sol->in6m_timer;
1180 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1181 if (maxdelay - mindelay == 0)
1185 (arc4random() % (maxdelay - mindelay)) +
1189 nd6_dad_start((struct ifaddr *)ia, delay);
1192 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1193 ifa_free(&ia->ia_ifa);
1198 * XXX: if a change of an existing address failed, keep the entry
1202 in6_unlink_ifa(ia, ifp);
1203 ifa_free(&ia->ia_ifa);
1208 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1209 ifa_free(&ia->ia_ifa);
1210 in6_purgeaddr(&ia->ia_ifa);
1215 in6_purgeaddr(struct ifaddr *ifa)
1217 struct ifnet *ifp = ifa->ifa_ifp;
1218 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1219 struct in6_multi_mship *imm;
1220 struct sockaddr_in6 mltaddr, mltmask;
1222 struct sockaddr_dl gateway;
1223 struct sockaddr_in6 mask, addr;
1226 struct ifaddr *ifa0, *nifa;
1229 * find another IPv6 address as the gateway for the
1230 * link-local and node-local all-nodes multicast
1234 TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) {
1235 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1236 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1237 &ia->ia_addr.sin6_addr,
1238 sizeof(struct in6_addr)) == 0)
1245 IF_ADDR_UNLOCK(ifp);
1248 * Remove the loopback route to the interface address.
1249 * The check for the current setting of "nd6_useloopback"
1252 if (ia->ia_flags & IFA_RTSELF) {
1253 error = ifa_del_loopback_route((struct ifaddr *)ia,
1254 (struct sockaddr *)&ia->ia_addr);
1256 ia->ia_flags &= ~IFA_RTSELF;
1259 /* stop DAD processing */
1262 IF_AFDATA_LOCK(ifp);
1263 lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR),
1264 (struct sockaddr *)&ia->ia_addr);
1265 IF_AFDATA_UNLOCK(ifp);
1268 * initialize for rtmsg generation
1270 bzero(&gateway, sizeof(gateway));
1271 gateway.sdl_len = sizeof(gateway);
1272 gateway.sdl_family = AF_LINK;
1273 gateway.sdl_nlen = 0;
1274 gateway.sdl_alen = ifp->if_addrlen;
1276 bzero(&rt0, sizeof(rt0));
1277 rt0.rt_gateway = (struct sockaddr *)&gateway;
1278 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
1279 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
1280 rt_mask(&rt0) = (struct sockaddr *)&mask;
1281 rt_key(&rt0) = (struct sockaddr *)&addr;
1282 rt0.rt_flags = RTF_HOST | RTF_STATIC;
1283 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
1286 * leave from multicast groups we have joined for the interface
1288 while ((imm = ia->ia6_memberships.lh_first) != NULL) {
1289 LIST_REMOVE(imm, i6mm_chain);
1290 in6_leavegroup(imm);
1294 * remove the link-local all-nodes address
1296 bzero(&mltmask, sizeof(mltmask));
1297 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1298 mltmask.sin6_family = AF_INET6;
1299 mltmask.sin6_addr = in6mask32;
1301 bzero(&mltaddr, sizeof(mltaddr));
1302 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1303 mltaddr.sin6_family = AF_INET6;
1304 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1306 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1310 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1311 if (rt != NULL && rt->rt_gateway != NULL &&
1312 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1313 &ia->ia_addr.sin6_addr,
1314 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1316 * if no more IPv6 address exists on this interface
1317 * then remove the multicast address route
1320 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1321 sizeof(mltaddr.sin6_addr));
1323 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr,
1324 (struct sockaddr *)&ia->ia_addr,
1325 (struct sockaddr *)&mltmask, RTF_UP,
1326 (struct rtentry **)0);
1328 log(LOG_INFO, "in6_purgeaddr: link-local all-nodes"
1329 "multicast address deletion error\n");
1332 * replace the gateway of the route
1334 struct sockaddr_in6 sa;
1336 bzero(&sa, sizeof(sa));
1337 sa.sin6_len = sizeof(struct sockaddr_in6);
1338 sa.sin6_family = AF_INET6;
1339 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1340 sizeof(sa.sin6_addr));
1341 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL);
1342 memcpy(rt->rt_gateway, &sa, sizeof(sa));
1351 * remove the node-local all-nodes address
1353 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1354 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1358 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1359 if (rt != NULL && rt->rt_gateway != NULL &&
1360 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1361 &ia->ia_addr.sin6_addr,
1362 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1364 * if no more IPv6 address exists on this interface
1365 * then remove the multicast address route
1368 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1369 sizeof(mltaddr.sin6_addr));
1372 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr,
1373 (struct sockaddr *)&ia->ia_addr,
1374 (struct sockaddr *)&mltmask, RTF_UP,
1375 (struct rtentry **)0);
1378 log(LOG_INFO, "in6_purgeaddr: node-local all-nodes"
1379 "multicast address deletion error\n");
1382 * replace the gateway of the route
1384 struct sockaddr_in6 sa;
1386 bzero(&sa, sizeof(sa));
1387 sa.sin6_len = sizeof(struct sockaddr_in6);
1388 sa.sin6_family = AF_INET6;
1389 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1390 sizeof(sa.sin6_addr));
1391 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL);
1392 memcpy(rt->rt_gateway, &sa, sizeof(sa));
1402 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1403 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1405 struct sockaddr *dstaddr;
1408 * use the interface address if configuring an
1409 * interface address with a /128 prefix len
1411 if (ia->ia_dstaddr.sin6_family == AF_INET6)
1412 dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
1414 dstaddr = (struct sockaddr *)&ia->ia_addr;
1416 error = rtrequest(RTM_DELETE,
1417 (struct sockaddr *)dstaddr,
1418 (struct sockaddr *)&ia->ia_addr,
1419 (struct sockaddr *)&ia->ia_prefixmask,
1420 ia->ia_flags | RTF_HOST, NULL);
1423 ia->ia_flags &= ~IFA_ROUTE;
1428 in6_unlink_ifa(ia, ifp);
1432 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1437 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1438 IF_ADDR_UNLOCK(ifp);
1439 ifa_free(&ia->ia_ifa); /* if_addrhead */
1442 * Defer the release of what might be the last reference to the
1443 * in6_ifaddr so that it can't be freed before the remainder of the
1447 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1448 IN6_IFADDR_WUNLOCK();
1451 * Release the reference to the base prefix. There should be a
1452 * positive reference.
1454 if (ia->ia6_ndpr == NULL) {
1456 "in6_unlink_ifa: autoconf'ed address "
1457 "%p has no prefix\n", ia));
1459 ia->ia6_ndpr->ndpr_refcnt--;
1460 ia->ia6_ndpr = NULL;
1464 * Also, if the address being removed is autoconf'ed, call
1465 * pfxlist_onlink_check() since the release might affect the status of
1466 * other (detached) addresses.
1468 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1469 pfxlist_onlink_check();
1471 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1476 in6_purgeif(struct ifnet *ifp)
1478 struct ifaddr *ifa, *nifa;
1480 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1481 if (ifa->ifa_addr->sa_family != AF_INET6)
1491 * SIOCGLIFADDR: get first address. (?)
1492 * SIOCGLIFADDR with IFLR_PREFIX:
1493 * get first address that matches the specified prefix.
1494 * SIOCALIFADDR: add the specified address.
1495 * SIOCALIFADDR with IFLR_PREFIX:
1496 * add the specified prefix, filling hostid part from
1497 * the first link-local address. prefixlen must be <= 64.
1498 * SIOCDLIFADDR: delete the specified address.
1499 * SIOCDLIFADDR with IFLR_PREFIX:
1500 * delete the first address that matches the specified prefix.
1502 * EINVAL on invalid parameters
1503 * EADDRNOTAVAIL on prefix match failed/specified address not found
1504 * other values may be returned from in6_ioctl()
1506 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1507 * this is to accomodate address naming scheme other than RFC2374,
1509 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1510 * address encoding scheme. (see figure on page 8)
1513 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1514 struct ifnet *ifp, struct thread *td)
1516 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1518 struct sockaddr *sa;
1521 if (!data || !ifp) {
1522 panic("invalid argument to in6_lifaddr_ioctl");
1528 /* address must be specified on GET with IFLR_PREFIX */
1529 if ((iflr->flags & IFLR_PREFIX) == 0)
1534 /* address must be specified on ADD and DELETE */
1535 sa = (struct sockaddr *)&iflr->addr;
1536 if (sa->sa_family != AF_INET6)
1538 if (sa->sa_len != sizeof(struct sockaddr_in6))
1540 /* XXX need improvement */
1541 sa = (struct sockaddr *)&iflr->dstaddr;
1542 if (sa->sa_family && sa->sa_family != AF_INET6)
1544 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1547 default: /* shouldn't happen */
1549 panic("invalid cmd to in6_lifaddr_ioctl");
1555 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1561 struct in6_aliasreq ifra;
1562 struct in6_addr *hostid = NULL;
1566 if ((iflr->flags & IFLR_PREFIX) != 0) {
1567 struct sockaddr_in6 *sin6;
1570 * hostid is to fill in the hostid part of the
1571 * address. hostid points to the first link-local
1572 * address attached to the interface.
1574 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1576 return EADDRNOTAVAIL;
1577 hostid = IFA_IN6(ifa);
1579 /* prefixlen must be <= 64. */
1580 if (64 < iflr->prefixlen)
1582 prefixlen = iflr->prefixlen;
1584 /* hostid part must be zero. */
1585 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1586 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1587 sin6->sin6_addr.s6_addr32[3] != 0) {
1591 prefixlen = iflr->prefixlen;
1593 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1594 bzero(&ifra, sizeof(ifra));
1595 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1597 bcopy(&iflr->addr, &ifra.ifra_addr,
1598 ((struct sockaddr *)&iflr->addr)->sa_len);
1600 /* fill in hostid part */
1601 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1602 hostid->s6_addr32[2];
1603 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1604 hostid->s6_addr32[3];
1607 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1608 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1609 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1611 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1612 hostid->s6_addr32[2];
1613 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1614 hostid->s6_addr32[3];
1620 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1621 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1623 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1624 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1629 struct in6_ifaddr *ia;
1630 struct in6_addr mask, candidate, match;
1631 struct sockaddr_in6 *sin6;
1634 bzero(&mask, sizeof(mask));
1635 if (iflr->flags & IFLR_PREFIX) {
1636 /* lookup a prefix rather than address. */
1637 in6_prefixlen2mask(&mask, iflr->prefixlen);
1639 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1640 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1641 match.s6_addr32[0] &= mask.s6_addr32[0];
1642 match.s6_addr32[1] &= mask.s6_addr32[1];
1643 match.s6_addr32[2] &= mask.s6_addr32[2];
1644 match.s6_addr32[3] &= mask.s6_addr32[3];
1646 /* if you set extra bits, that's wrong */
1647 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1652 if (cmd == SIOCGLIFADDR) {
1653 /* on getting an address, take the 1st match */
1656 /* on deleting an address, do exact match */
1657 in6_prefixlen2mask(&mask, 128);
1658 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1659 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1666 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1667 if (ifa->ifa_addr->sa_family != AF_INET6)
1673 * XXX: this is adhoc, but is necessary to allow
1674 * a user to specify fe80::/64 (not /10) for a
1675 * link-local address.
1677 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1678 in6_clearscope(&candidate);
1679 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1680 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1681 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1682 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1683 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1686 IF_ADDR_UNLOCK(ifp);
1688 return EADDRNOTAVAIL;
1691 if (cmd == SIOCGLIFADDR) {
1694 /* fill in the if_laddrreq structure */
1695 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1696 error = sa6_recoverscope(
1697 (struct sockaddr_in6 *)&iflr->addr);
1701 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1702 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1703 ia->ia_dstaddr.sin6_len);
1704 error = sa6_recoverscope(
1705 (struct sockaddr_in6 *)&iflr->dstaddr);
1709 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1712 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1714 iflr->flags = ia->ia6_flags; /* XXX */
1718 struct in6_aliasreq ifra;
1720 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1721 bzero(&ifra, sizeof(ifra));
1722 bcopy(iflr->iflr_name, ifra.ifra_name,
1723 sizeof(ifra.ifra_name));
1725 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1726 ia->ia_addr.sin6_len);
1727 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1728 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1729 ia->ia_dstaddr.sin6_len);
1731 bzero(&ifra.ifra_dstaddr,
1732 sizeof(ifra.ifra_dstaddr));
1734 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1735 ia->ia_prefixmask.sin6_len);
1737 ifra.ifra_flags = ia->ia6_flags;
1738 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1744 return EOPNOTSUPP; /* just for safety */
1748 * Initialize an interface's intetnet6 address
1749 * and routing table entry.
1752 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1753 struct sockaddr_in6 *sin6, int newhost)
1755 int error = 0, plen, ifacount = 0;
1760 * Give the interface a chance to initialize
1761 * if this is its first address,
1762 * and to validate the address if necessary.
1765 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1766 if (ifa->ifa_addr->sa_family != AF_INET6)
1770 IF_ADDR_UNLOCK(ifp);
1772 ia->ia_addr = *sin6;
1774 if (ifacount <= 1 && ifp->if_ioctl) {
1775 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1783 ia->ia_ifa.ifa_metric = ifp->if_metric;
1785 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1789 * If a new destination address is specified for a point-to-point
1790 * interface, install a route to the destination as an interface
1792 * XXX: the logic below rejects assigning multiple addresses on a p2p
1793 * interface that share the same destination.
1795 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1796 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1797 ia->ia_dstaddr.sin6_family == AF_INET6) {
1798 int rtflags = RTF_UP | RTF_HOST;
1800 error = rtrequest(RTM_ADD,
1801 (struct sockaddr *)&ia->ia_dstaddr,
1802 (struct sockaddr *)&ia->ia_addr,
1803 (struct sockaddr *)&ia->ia_prefixmask,
1804 ia->ia_flags | rtflags, NULL);
1807 ia->ia_flags |= IFA_ROUTE;
1811 * add a loopback route to self
1813 if (!(ia->ia_flags & IFA_ROUTE)
1814 && (V_nd6_useloopback
1815 || (ifp->if_flags & IFF_LOOPBACK))) {
1816 error = ifa_add_loopback_route((struct ifaddr *)ia,
1817 (struct sockaddr *)&ia->ia_addr);
1819 ia->ia_flags |= IFA_RTSELF;
1822 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1826 struct sockaddr_dl gateway;
1827 struct sockaddr_in6 mask, addr;
1829 IF_AFDATA_LOCK(ifp);
1830 ia->ia_ifa.ifa_rtrequest = NULL;
1833 * we need to report rt_newaddrmsg
1835 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE),
1836 (struct sockaddr *)&ia->ia_addr);
1837 IF_AFDATA_UNLOCK(ifp);
1839 ln->la_expire = 0; /* for IPv6 this means permanent */
1840 ln->ln_state = ND6_LLINFO_REACHABLE;
1842 * initialize for rtmsg generation
1844 bzero(&gateway, sizeof(gateway));
1845 gateway.sdl_len = sizeof(gateway);
1846 gateway.sdl_family = AF_LINK;
1847 gateway.sdl_nlen = 0;
1848 gateway.sdl_alen = 6;
1849 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr));
1854 bzero(&rt, sizeof(rt));
1855 rt.rt_gateway = (struct sockaddr *)&gateway;
1856 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
1857 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
1858 rt_mask(&rt) = (struct sockaddr *)&mask;
1859 rt_key(&rt) = (struct sockaddr *)&addr;
1860 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
1861 rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt);
1868 * Find an IPv6 interface link-local address specific to an interface.
1869 * ifaddr is returned referenced.
1872 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1877 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1878 if (ifa->ifa_addr->sa_family != AF_INET6)
1880 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1881 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1888 IF_ADDR_UNLOCK(ifp);
1890 return ((struct in6_ifaddr *)ifa);
1895 * find the internet address corresponding to a given interface and address.
1896 * ifaddr is returned referenced.
1899 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1904 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1905 if (ifa->ifa_addr->sa_family != AF_INET6)
1907 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1912 IF_ADDR_UNLOCK(ifp);
1914 return ((struct in6_ifaddr *)ifa);
1918 * Convert IP6 address to printable (loggable) representation. Caller
1919 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1921 static char digits[] = "0123456789abcdef";
1923 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1925 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1927 const u_int16_t *a = (const u_int16_t *)addr;
1929 int dcolon = 0, zero = 0;
1933 for (i = 0; i < 8; i++) {
1934 if (*(a + i) == 0) {
1939 else if (maxcnt < cnt) {
1950 for (i = 0; i < 8; i++) {
1961 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1973 d = (const u_char *)a;
1974 /* Try to eliminate leading zeros in printout like in :0001. */
1976 *cp = digits[*d >> 4];
1981 *cp = digits[*d++ & 0xf];
1982 if (zero == 0 || (*cp != '0')) {
1986 *cp = digits[*d >> 4];
1987 if (zero == 0 || (*cp != '0')) {
1991 *cp++ = digits[*d & 0xf];
2000 in6_localaddr(struct in6_addr *in6)
2002 struct in6_ifaddr *ia;
2004 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2008 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2009 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2010 &ia->ia_prefixmask.sin6_addr)) {
2011 IN6_IFADDR_RUNLOCK();
2015 IN6_IFADDR_RUNLOCK();
2021 * Return 1 if an internet address is for the local host and configured
2022 * on one of its interfaces.
2025 in6_localip(struct in6_addr *in6)
2027 struct in6_ifaddr *ia;
2030 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2031 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2032 IN6_IFADDR_RUNLOCK();
2036 IN6_IFADDR_RUNLOCK();
2042 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2044 struct in6_ifaddr *ia;
2047 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2048 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
2050 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) {
2051 IN6_IFADDR_RUNLOCK();
2052 return (1); /* true */
2055 /* XXX: do we still have to go thru the rest of the list? */
2057 IN6_IFADDR_RUNLOCK();
2059 return (0); /* false */
2063 * return length of part which dst and src are equal
2067 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2070 u_char *s = (u_char *)src, *d = (u_char *)dst;
2071 u_char *lim = s + 16, r;
2074 if ((r = (*d++ ^ *s++)) != 0) {
2085 /* XXX: to be scope conscious */
2087 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2089 int bytelen, bitlen;
2092 if (0 > len || len > 128) {
2093 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2101 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2104 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2105 p2->s6_addr[bytelen] >> (8 - bitlen))
2112 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2114 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2115 int bytelen, bitlen, i;
2118 if (0 > len || len > 128) {
2119 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2124 bzero(maskp, sizeof(*maskp));
2127 for (i = 0; i < bytelen; i++)
2128 maskp->s6_addr[i] = 0xff;
2130 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2134 * return the best address out of the same scope. if no address was
2135 * found, return the first valid address from designated IF.
2138 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2140 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2142 struct in6_ifaddr *besta = 0;
2143 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2145 dep[0] = dep[1] = NULL;
2148 * We first look for addresses in the same scope.
2149 * If there is one, return it.
2150 * If two or more, return one which matches the dst longest.
2151 * If none, return one of global addresses assigned other ifs.
2154 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2155 if (ifa->ifa_addr->sa_family != AF_INET6)
2157 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2158 continue; /* XXX: is there any case to allow anycast? */
2159 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2160 continue; /* don't use this interface */
2161 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2163 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2164 if (V_ip6_use_deprecated)
2165 dep[0] = (struct in6_ifaddr *)ifa;
2169 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2171 * call in6_matchlen() as few as possible
2175 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2176 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2179 besta = (struct in6_ifaddr *)ifa;
2182 besta = (struct in6_ifaddr *)ifa;
2186 ifa_ref(&besta->ia_ifa);
2187 IF_ADDR_UNLOCK(ifp);
2190 IF_ADDR_UNLOCK(ifp);
2193 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2194 if (ifa->ifa_addr->sa_family != AF_INET6)
2196 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2197 continue; /* XXX: is there any case to allow anycast? */
2198 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2199 continue; /* don't use this interface */
2200 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2202 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2203 if (V_ip6_use_deprecated)
2204 dep[1] = (struct in6_ifaddr *)ifa;
2210 IN6_IFADDR_RUNLOCK();
2211 return (struct in6_ifaddr *)ifa;
2213 IN6_IFADDR_RUNLOCK();
2215 /* use the last-resort values, that are, deprecated addresses */
2225 * perform DAD when interface becomes IFF_UP.
2228 in6_if_up(struct ifnet *ifp)
2231 struct in6_ifaddr *ia;
2234 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2235 if (ifa->ifa_addr->sa_family != AF_INET6)
2237 ia = (struct in6_ifaddr *)ifa;
2238 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2240 * The TENTATIVE flag was likely set by hand
2241 * beforehand, implicitly indicating the need for DAD.
2242 * We may be able to skip the random delay in this
2243 * case, but we impose delays just in case.
2246 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2249 IF_ADDR_UNLOCK(ifp);
2252 * special cases, like 6to4, are handled in in6_ifattach
2254 in6_ifattach(ifp, NULL);
2258 in6if_do_dad(struct ifnet *ifp)
2260 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2263 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2266 switch (ifp->if_type) {
2272 * These interfaces do not have the IFF_LOOPBACK flag,
2273 * but loop packets back. We do not have to do DAD on such
2274 * interfaces. We should even omit it, because loop-backed
2275 * NS would confuse the DAD procedure.
2280 * Our DAD routine requires the interface up and running.
2281 * However, some interfaces can be up before the RUNNING
2282 * status. Additionaly, users may try to assign addresses
2283 * before the interface becomes up (or running).
2284 * We simply skip DAD in such a case as a work around.
2285 * XXX: we should rather mark "tentative" on such addresses,
2286 * and do DAD after the interface becomes ready.
2288 if (!((ifp->if_flags & IFF_UP) &&
2289 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2297 * Calculate max IPv6 MTU through all the interfaces and store it
2303 unsigned long maxmtu = 0;
2306 IFNET_RLOCK_NOSLEEP();
2307 for (ifp = TAILQ_FIRST(&V_ifnet); ifp;
2308 ifp = TAILQ_NEXT(ifp, if_list)) {
2309 /* this function can be called during ifnet initialization */
2310 if (!ifp->if_afdata[AF_INET6])
2312 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2313 IN6_LINKMTU(ifp) > maxmtu)
2314 maxmtu = IN6_LINKMTU(ifp);
2316 IFNET_RUNLOCK_NOSLEEP();
2317 if (maxmtu) /* update only when maxmtu is positive */
2318 V_in6_maxmtu = maxmtu;
2322 * Provide the length of interface identifiers to be used for the link attached
2323 * to the given interface. The length should be defined in "IPv6 over
2324 * xxx-link" document. Note that address architecture might also define
2325 * the length for a particular set of address prefixes, regardless of the
2326 * link type. As clarified in rfc2462bis, those two definitions should be
2327 * consistent, and those really are as of August 2004.
2330 in6_if2idlen(struct ifnet *ifp)
2332 switch (ifp->if_type) {
2333 case IFT_ETHER: /* RFC2464 */
2334 #ifdef IFT_PROPVIRTUAL
2335 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2338 case IFT_L2VLAN: /* ditto */
2340 #ifdef IFT_IEEE80211
2341 case IFT_IEEE80211: /* ditto */
2344 case IFT_MIP: /* ditto */
2346 case IFT_INFINIBAND:
2348 case IFT_FDDI: /* RFC2467 */
2350 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2352 case IFT_PPP: /* RFC2472 */
2354 case IFT_ARCNET: /* RFC2497 */
2356 case IFT_FRELAY: /* RFC2590 */
2358 case IFT_IEEE1394: /* RFC3146 */
2361 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2363 return (64); /* XXX: is this really correct? */
2366 * Unknown link type:
2367 * It might be controversial to use the today's common constant
2368 * of 64 for these cases unconditionally. For full compliance,
2369 * we should return an error in this case. On the other hand,
2370 * if we simply miss the standard for the link type or a new
2371 * standard is defined for a new link type, the IFID length
2372 * is very likely to be the common constant. As a compromise,
2373 * we always use the constant, but make an explicit notice
2374 * indicating the "unknown" case.
2376 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2381 #include <sys/sysctl.h>
2383 struct in6_llentry {
2384 struct llentry base;
2385 struct sockaddr_in6 l3_addr6;
2388 static struct llentry *
2389 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2391 struct in6_llentry *lle;
2393 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE,
2394 M_DONTWAIT | M_ZERO);
2395 if (lle == NULL) /* NB: caller generates msg */
2398 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2399 lle->base.lle_refcnt = 1;
2400 LLE_LOCK_INIT(&lle->base);
2401 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2402 CALLOUT_RETURNUNLOCKED);
2408 * Deletes an address from the address table.
2409 * This function is called by the timer functions
2410 * such as arptimer() and nd6_llinfo_timer(), and
2411 * the caller does the locking.
2414 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2417 LLE_LOCK_DESTROY(lle);
2418 free(lle, M_LLTABLE);
2422 in6_lltable_prefix_free(struct lltable *llt,
2423 const struct sockaddr *prefix,
2424 const struct sockaddr *mask,
2427 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2428 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2429 struct llentry *lle, *next;
2433 * (flags & LLE_STATIC) means deleting all entries
2434 * including static ND6 entries
2436 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) {
2437 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2438 if (IN6_ARE_MASKED_ADDR_EQUAL(
2439 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr,
2442 ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))) {
2445 canceled = callout_drain(&lle->la_timer);
2456 in6_lltable_rtcheck(struct ifnet *ifp,
2458 const struct sockaddr *l3addr)
2461 char ip6buf[INET6_ADDRSTRLEN];
2463 KASSERT(l3addr->sa_family == AF_INET6,
2464 ("sin_family %d", l3addr->sa_family));
2466 /* XXX rtalloc1 should take a const param */
2467 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0);
2468 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2471 * Create an ND6 cache for an IPv6 neighbor
2472 * that is not covered by our own prefix.
2474 /* XXX ifaof_ifpforaddr should take a const param */
2475 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2482 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2483 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2492 static struct llentry *
2493 in6_lltable_lookup(struct lltable *llt, u_int flags,
2494 const struct sockaddr *l3addr)
2496 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2497 struct ifnet *ifp = llt->llt_ifp;
2498 struct llentry *lle;
2499 struct llentries *lleh;
2502 IF_AFDATA_LOCK_ASSERT(ifp);
2503 KASSERT(l3addr->sa_family == AF_INET6,
2504 ("sin_family %d", l3addr->sa_family));
2506 hashkey = sin6->sin6_addr.s6_addr32[3];
2507 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2508 LIST_FOREACH(lle, lleh, lle_next) {
2509 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2510 if (lle->la_flags & LLE_DELETED)
2512 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2513 sizeof(struct in6_addr)) == 0)
2518 if (!(flags & LLE_CREATE))
2521 * A route that covers the given address must have
2522 * been installed 1st because we are doing a resolution,
2525 if (!(flags & LLE_IFADDR) &&
2526 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2529 lle = in6_lltable_new(l3addr, flags);
2531 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2534 lle->la_flags = flags & ~LLE_CREATE;
2535 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2536 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2537 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2541 lle->lle_head = lleh;
2542 LIST_INSERT_HEAD(lleh, lle, lle_next);
2543 } else if (flags & LLE_DELETE) {
2544 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2546 lle->la_flags = LLE_DELETED;
2549 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2554 if (LLE_IS_VALID(lle)) {
2555 if (flags & LLE_EXCLUSIVE)
2564 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2566 struct ifnet *ifp = llt->llt_ifp;
2567 struct llentry *lle;
2570 struct rt_msghdr rtm;
2571 struct sockaddr_in6 sin6;
2573 * ndp.c assumes that sdl is word aligned
2578 struct sockaddr_dl sdl;
2582 if (ifp->if_flags & IFF_LOOPBACK)
2585 LLTABLE_LOCK_ASSERT();
2588 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2589 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2590 struct sockaddr_dl *sdl;
2592 /* skip deleted or invalid entries */
2593 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2595 /* Skip if jailed and not a valid IP of the prison. */
2596 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2599 * produce a msg made of:
2601 * struct sockaddr_in6 (IPv6)
2602 * struct sockaddr_dl;
2604 bzero(&ndpc, sizeof(ndpc));
2605 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2606 ndpc.rtm.rtm_version = RTM_VERSION;
2607 ndpc.rtm.rtm_type = RTM_GET;
2608 ndpc.rtm.rtm_flags = RTF_UP;
2609 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2610 ndpc.sin6.sin6_family = AF_INET6;
2611 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2612 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2615 if (lle->la_flags & LLE_PUB)
2616 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2619 sdl->sdl_family = AF_LINK;
2620 sdl->sdl_len = sizeof(*sdl);
2621 sdl->sdl_alen = ifp->if_addrlen;
2622 sdl->sdl_index = ifp->if_index;
2623 sdl->sdl_type = ifp->if_type;
2624 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2625 ndpc.rtm.rtm_rmx.rmx_expire =
2626 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2627 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2628 if (lle->la_flags & LLE_STATIC)
2629 ndpc.rtm.rtm_flags |= RTF_STATIC;
2630 ndpc.rtm.rtm_index = ifp->if_index;
2631 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2640 in6_domifattach(struct ifnet *ifp)
2642 struct in6_ifextra *ext;
2644 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2645 bzero(ext, sizeof(*ext));
2647 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2648 M_IFADDR, M_WAITOK);
2649 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2652 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2653 M_IFADDR, M_WAITOK);
2654 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2656 ext->nd_ifinfo = nd6_ifattach(ifp);
2657 ext->scope6_id = scope6_ifattach(ifp);
2658 ext->lltable = lltable_init(ifp, AF_INET6);
2659 if (ext->lltable != NULL) {
2660 ext->lltable->llt_free = in6_lltable_free;
2661 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2662 ext->lltable->llt_lookup = in6_lltable_lookup;
2663 ext->lltable->llt_dump = in6_lltable_dump;
2666 ext->mld_ifinfo = mld_domifattach(ifp);
2672 in6_domifdetach(struct ifnet *ifp, void *aux)
2674 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2676 mld_domifdetach(ifp);
2677 scope6_ifdetach(ext->scope6_id);
2678 nd6_ifdetach(ext->nd_ifinfo);
2679 lltable_free(ext->lltable);
2680 free(ext->in6_ifstat, M_IFADDR);
2681 free(ext->icmp6_ifstat, M_IFADDR);
2682 free(ext, M_IFADDR);
2686 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2687 * v4 mapped addr or v4 compat addr
2690 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2693 bzero(sin, sizeof(*sin));
2694 sin->sin_len = sizeof(struct sockaddr_in);
2695 sin->sin_family = AF_INET;
2696 sin->sin_port = sin6->sin6_port;
2697 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2700 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2702 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2704 bzero(sin6, sizeof(*sin6));
2705 sin6->sin6_len = sizeof(struct sockaddr_in6);
2706 sin6->sin6_family = AF_INET6;
2707 sin6->sin6_port = sin->sin_port;
2708 sin6->sin6_addr.s6_addr32[0] = 0;
2709 sin6->sin6_addr.s6_addr32[1] = 0;
2710 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2711 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2714 /* Convert sockaddr_in6 into sockaddr_in. */
2716 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2718 struct sockaddr_in *sin_p;
2719 struct sockaddr_in6 sin6;
2722 * Save original sockaddr_in6 addr and convert it
2725 sin6 = *(struct sockaddr_in6 *)nam;
2726 sin_p = (struct sockaddr_in *)nam;
2727 in6_sin6_2_sin(sin_p, &sin6);
2730 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2732 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2734 struct sockaddr_in *sin_p;
2735 struct sockaddr_in6 *sin6_p;
2737 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
2739 sin_p = (struct sockaddr_in *)*nam;
2740 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2741 free(*nam, M_SONAME);
2742 *nam = (struct sockaddr *)sin6_p;