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 *);
139 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
140 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
143 in6_ifaddloop(struct ifaddr *ifa)
145 struct sockaddr_dl gateway;
146 struct sockaddr_in6 mask, addr;
148 struct in6_ifaddr *ia;
155 ifa->ifa_rtrequest = NULL;
158 * we need to report rt_newaddrmsg
160 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
161 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
162 IF_AFDATA_UNLOCK(ifp);
164 ln->la_expire = 0; /* for IPv6 this means permanent */
165 ln->ln_state = ND6_LLINFO_REACHABLE;
167 * initialize for rtmsg generation
169 bzero(&gateway, sizeof(gateway));
170 gateway.sdl_len = sizeof(gateway);
171 gateway.sdl_family = AF_LINK;
172 gateway.sdl_nlen = 0;
173 gateway.sdl_alen = 6;
174 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
175 sizeof(ln->ll_addr));
179 bzero(&rt, sizeof(rt));
180 rt.rt_gateway = (struct sockaddr *)&gateway;
181 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
182 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
183 rt_mask(&rt) = (struct sockaddr *)&mask;
184 rt_key(&rt) = (struct sockaddr *)&addr;
185 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
186 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
190 in6_ifremloop(struct ifaddr *ifa)
192 struct sockaddr_dl gateway;
193 struct sockaddr_in6 mask, addr;
195 struct in6_ifaddr *ia;
201 lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR),
202 (struct sockaddr *)&ia->ia_addr);
203 IF_AFDATA_UNLOCK(ifp);
206 * initialize for rtmsg generation
208 bzero(&gateway, sizeof(gateway));
209 gateway.sdl_len = sizeof(gateway);
210 gateway.sdl_family = AF_LINK;
211 gateway.sdl_nlen = 0;
212 gateway.sdl_alen = ifp->if_addrlen;
213 bzero(&rt0, sizeof(rt0));
214 rt0.rt_gateway = (struct sockaddr *)&gateway;
215 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
216 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
217 rt_mask(&rt0) = (struct sockaddr *)&mask;
218 rt_key(&rt0) = (struct sockaddr *)&addr;
219 rt0.rt_flags = RTF_HOST | RTF_STATIC;
220 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
224 in6_mask2len(struct in6_addr *mask, u_char *lim0)
227 u_char *lim = lim0, *p;
229 /* ignore the scope_id part */
230 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
231 lim = (u_char *)mask + sizeof(*mask);
232 for (p = (u_char *)mask; p < lim; x++, p++) {
238 for (y = 0; y < 8; y++) {
239 if ((*p & (0x80 >> y)) == 0)
245 * when the limit pointer is given, do a stricter check on the
249 if (y != 0 && (*p & (0x00ff >> y)) != 0)
251 for (p = p + 1; p < lim; p++)
259 #ifdef COMPAT_FREEBSD32
260 struct in6_ndifreq32 {
261 char ifname[IFNAMSIZ];
264 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
268 in6_control(struct socket *so, u_long cmd, caddr_t data,
269 struct ifnet *ifp, struct thread *td)
271 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
272 struct in6_ifaddr *ia = NULL;
273 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
274 struct sockaddr_in6 *sa6;
278 case SIOCGETSGCNT_IN6:
279 case SIOCGETMIFCNT_IN6:
280 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
284 case SIOCAADDRCTL_POLICY:
285 case SIOCDADDRCTL_POLICY:
287 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
291 return (in6_src_ioctl(cmd, data));
298 case SIOCSNDFLUSH_IN6:
299 case SIOCSPFXFLUSH_IN6:
300 case SIOCSRTRFLUSH_IN6:
301 case SIOCSDEFIFACE_IN6:
302 case SIOCSIFINFO_FLAGS:
303 case SIOCSIFINFO_IN6:
305 error = priv_check(td, PRIV_NETINET_ND6);
310 case OSIOCGIFINFO_IN6:
311 case SIOCGIFINFO_IN6:
314 case SIOCGNBRINFO_IN6:
315 case SIOCGDEFIFACE_IN6:
316 return (nd6_ioctl(cmd, data, ifp));
318 #ifdef COMPAT_FREEBSD32
319 case SIOCGDEFIFACE32_IN6:
321 struct in6_ndifreq ndif;
322 struct in6_ndifreq32 *ndif32;
324 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
328 ndif32 = (struct in6_ndifreq32 *)data;
329 ndif32->ifindex = ndif.ifindex;
336 case SIOCSIFPREFIX_IN6:
337 case SIOCDIFPREFIX_IN6:
338 case SIOCAIFPREFIX_IN6:
339 case SIOCCIFPREFIX_IN6:
340 case SIOCSGIFPREFIX_IN6:
341 case SIOCGIFPREFIX_IN6:
343 "prefix ioctls are now invalidated. "
344 "please use ifconfig.\n");
351 error = priv_check(td, PRIV_NETINET_SCOPE6);
355 return (scope6_set(ifp,
356 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
358 return (scope6_get(ifp,
359 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
361 return (scope6_get_default((struct scope6_id *)
362 ifr->ifr_ifru.ifru_scope_id));
368 error = priv_check(td, PRIV_NET_ADDIFADDR);
372 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
376 error = priv_check(td, PRIV_NET_DELIFADDR);
382 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
386 * Find address for this interface, if it exists.
388 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
389 * only, and used the first interface address as the target of other
390 * operations (without checking ifra_addr). This was because netinet
391 * code/API assumed at most 1 interface address per interface.
392 * Since IPv6 allows a node to assign multiple addresses
393 * on a single interface, we almost always look and check the
394 * presence of ifra_addr, and reject invalid ones here.
395 * It also decreases duplicated code among SIOC*_IN6 operations.
398 case SIOCAIFADDR_IN6:
399 case SIOCSIFPHYADDR_IN6:
400 sa6 = &ifra->ifra_addr;
402 case SIOCSIFADDR_IN6:
403 case SIOCGIFADDR_IN6:
404 case SIOCSIFDSTADDR_IN6:
405 case SIOCSIFNETMASK_IN6:
406 case SIOCGIFDSTADDR_IN6:
407 case SIOCGIFNETMASK_IN6:
408 case SIOCDIFADDR_IN6:
409 case SIOCGIFPSRCADDR_IN6:
410 case SIOCGIFPDSTADDR_IN6:
411 case SIOCGIFAFLAG_IN6:
412 case SIOCSNDFLUSH_IN6:
413 case SIOCSPFXFLUSH_IN6:
414 case SIOCSRTRFLUSH_IN6:
415 case SIOCGIFALIFETIME_IN6:
416 case SIOCSIFALIFETIME_IN6:
417 case SIOCGIFSTAT_IN6:
418 case SIOCGIFSTAT_ICMP6:
419 sa6 = &ifr->ifr_addr;
425 if (sa6 && sa6->sin6_family == AF_INET6) {
426 if (sa6->sin6_scope_id != 0)
427 error = sa6_embedscope(sa6, 0);
429 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
432 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
433 &sa6->sin6_addr)) != 0)
435 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
440 case SIOCSIFADDR_IN6:
441 case SIOCSIFDSTADDR_IN6:
442 case SIOCSIFNETMASK_IN6:
444 * Since IPv6 allows a node to assign multiple addresses
445 * on a single interface, SIOCSIFxxx ioctls are deprecated.
447 /* we decided to obsolete this command (20000704) */
451 case SIOCDIFADDR_IN6:
453 * for IPv4, we look for existing in_ifaddr here to allow
454 * "ifconfig if0 delete" to remove the first IPv4 address on
455 * the interface. For IPv6, as the spec allows multiple
456 * interface address from the day one, we consider "remove the
457 * first one" semantics to be not preferable.
460 error = EADDRNOTAVAIL;
464 case SIOCAIFADDR_IN6:
466 * We always require users to specify a valid IPv6 address for
467 * the corresponding operation.
469 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
470 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
471 error = EAFNOSUPPORT;
476 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
477 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
483 case SIOCGIFADDR_IN6:
484 /* This interface is basically deprecated. use SIOCGIFCONF. */
486 case SIOCGIFAFLAG_IN6:
487 case SIOCGIFNETMASK_IN6:
488 case SIOCGIFDSTADDR_IN6:
489 case SIOCGIFALIFETIME_IN6:
490 /* must think again about its semantics */
492 error = EADDRNOTAVAIL;
497 case SIOCSIFALIFETIME_IN6:
499 struct in6_addrlifetime *lt;
502 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
507 error = EADDRNOTAVAIL;
510 /* sanity for overflow - beware unsigned */
511 lt = &ifr->ifr_ifru.ifru_lifetime;
512 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
513 lt->ia6t_vltime + time_second < time_second) {
517 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
518 lt->ia6t_pltime + time_second < time_second) {
527 case SIOCGIFADDR_IN6:
528 ifr->ifr_addr = ia->ia_addr;
529 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
533 case SIOCGIFDSTADDR_IN6:
534 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
539 * XXX: should we check if ifa_dstaddr is NULL and return
542 ifr->ifr_dstaddr = ia->ia_dstaddr;
543 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
547 case SIOCGIFNETMASK_IN6:
548 ifr->ifr_addr = ia->ia_prefixmask;
551 case SIOCGIFAFLAG_IN6:
552 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
555 case SIOCGIFSTAT_IN6:
560 bzero(&ifr->ifr_ifru.ifru_stat,
561 sizeof(ifr->ifr_ifru.ifru_stat));
562 ifr->ifr_ifru.ifru_stat =
563 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
566 case SIOCGIFSTAT_ICMP6:
571 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
572 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
573 ifr->ifr_ifru.ifru_icmp6stat =
574 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
577 case SIOCGIFALIFETIME_IN6:
578 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
579 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
581 struct in6_addrlifetime *retlt =
582 &ifr->ifr_ifru.ifru_lifetime;
585 * XXX: adjust expiration time assuming time_t is
589 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
590 if (ia->ia6_lifetime.ia6t_vltime <
591 maxexpire - ia->ia6_updatetime) {
592 retlt->ia6t_expire = ia->ia6_updatetime +
593 ia->ia6_lifetime.ia6t_vltime;
595 retlt->ia6t_expire = maxexpire;
597 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
599 struct in6_addrlifetime *retlt =
600 &ifr->ifr_ifru.ifru_lifetime;
603 * XXX: adjust expiration time assuming time_t is
607 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
608 if (ia->ia6_lifetime.ia6t_pltime <
609 maxexpire - ia->ia6_updatetime) {
610 retlt->ia6t_preferred = ia->ia6_updatetime +
611 ia->ia6_lifetime.ia6t_pltime;
613 retlt->ia6t_preferred = maxexpire;
617 case SIOCSIFALIFETIME_IN6:
618 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
620 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
621 ia->ia6_lifetime.ia6t_expire =
622 time_second + ia->ia6_lifetime.ia6t_vltime;
624 ia->ia6_lifetime.ia6t_expire = 0;
625 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
626 ia->ia6_lifetime.ia6t_preferred =
627 time_second + ia->ia6_lifetime.ia6t_pltime;
629 ia->ia6_lifetime.ia6t_preferred = 0;
632 case SIOCAIFADDR_IN6:
635 struct nd_prefixctl pr0;
636 struct nd_prefix *pr;
639 * first, make or update the interface address structure,
640 * and link it to the list.
642 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
645 ifa_free(&ia->ia_ifa);
646 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
649 * this can happen when the user specify the 0 valid
656 * then, make the prefix on-link on the interface.
657 * XXX: we'd rather create the prefix before the address, but
658 * we need at least one address to install the corresponding
659 * interface route, so we configure the address first.
663 * convert mask to prefix length (prefixmask has already
664 * been validated in in6_update_ifa().
666 bzero(&pr0, sizeof(pr0));
668 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
670 if (pr0.ndpr_plen == 128) {
671 break; /* we don't need to install a host route. */
673 pr0.ndpr_prefix = ifra->ifra_addr;
674 /* apply the mask for safety. */
675 for (i = 0; i < 4; i++) {
676 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
677 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
680 * XXX: since we don't have an API to set prefix (not address)
681 * lifetimes, we just use the same lifetimes as addresses.
682 * The (temporarily) installed lifetimes can be overridden by
683 * later advertised RAs (when accept_rtadv is non 0), which is
684 * an intended behavior.
686 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
688 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
689 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
690 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
692 /* add the prefix if not yet. */
693 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
695 * nd6_prelist_add will install the corresponding
698 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
701 log(LOG_ERR, "nd6_prelist_add succeeded but "
708 /* relate the address to the prefix */
709 if (ia->ia6_ndpr == NULL) {
714 * If this is the first autoconf address from the
715 * prefix, create a temporary address as well
718 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
719 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
721 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
722 log(LOG_NOTICE, "in6_control: failed "
723 "to create a temporary address, "
730 * this might affect the status of autoconfigured addresses,
731 * that is, this address might make other addresses detached.
733 pfxlist_onlink_check();
734 if (error == 0 && ia) {
735 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
737 * Try to clear the flag when a new
738 * IPv6 address is added onto an
739 * IFDISABLED interface and it
742 struct in6_ndireq nd;
744 memset(&nd, 0, sizeof(nd));
745 nd.ndi.flags = ND_IFINFO(ifp)->flags;
746 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
747 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
748 (caddr_t)&nd, ifp) < 0)
749 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
750 "SIOCSIFINFO_FLAGS for -ifdisabled "
753 * Ignore failure of clearing the flag
754 * intentionally. The failure means
755 * address duplication was detected.
758 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
763 case SIOCDIFADDR_IN6:
765 struct nd_prefix *pr;
768 * If the address being deleted is the only one that owns
769 * the corresponding prefix, expire the prefix as well.
770 * XXX: theoretically, we don't have to worry about such
771 * relationship, since we separate the address management
772 * and the prefix management. We do this, however, to provide
773 * as much backward compatibility as possible in terms of
774 * the ioctl operation.
775 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
778 in6_purgeaddr(&ia->ia_ifa);
779 if (pr && pr->ndpr_refcnt == 0)
781 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
786 if (ifp == NULL || ifp->if_ioctl == 0) {
790 error = (*ifp->if_ioctl)(ifp, cmd, data);
797 ifa_free(&ia->ia_ifa);
802 * Update parameters of an IPv6 interface address.
803 * If necessary, a new entry is created and linked into address chains.
804 * This function is separated from in6_control().
805 * XXX: should this be performed under splnet()?
808 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
809 struct in6_ifaddr *ia, int flags)
811 int error = 0, hostIsNew = 0, plen = -1;
812 struct sockaddr_in6 dst6;
813 struct in6_addrlifetime *lt;
814 struct in6_multi_mship *imm;
815 struct in6_multi *in6m_sol;
818 char ip6buf[INET6_ADDRSTRLEN];
820 /* Validate parameters */
821 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
825 * The destination address for a p2p link must have a family
826 * of AF_UNSPEC or AF_INET6.
828 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
829 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
830 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
831 return (EAFNOSUPPORT);
833 * validate ifra_prefixmask. don't check sin6_family, netmask
834 * does not carry fields other than sin6_len.
836 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
839 * Because the IPv6 address architecture is classless, we require
840 * users to specify a (non 0) prefix length (mask) for a new address.
841 * We also require the prefix (when specified) mask is valid, and thus
842 * reject a non-consecutive mask.
844 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
846 if (ifra->ifra_prefixmask.sin6_len != 0) {
847 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
848 (u_char *)&ifra->ifra_prefixmask +
849 ifra->ifra_prefixmask.sin6_len);
854 * In this case, ia must not be NULL. We just use its prefix
857 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
860 * If the destination address on a p2p interface is specified,
861 * and the address is a scoped one, validate/set the scope
864 dst6 = ifra->ifra_dstaddr;
865 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
866 (dst6.sin6_family == AF_INET6)) {
867 struct in6_addr in6_tmp;
870 in6_tmp = dst6.sin6_addr;
871 if (in6_setscope(&in6_tmp, ifp, &zoneid))
872 return (EINVAL); /* XXX: should be impossible */
874 if (dst6.sin6_scope_id != 0) {
875 if (dst6.sin6_scope_id != zoneid)
877 } else /* user omit to specify the ID. */
878 dst6.sin6_scope_id = zoneid;
880 /* convert into the internal form */
881 if (sa6_embedscope(&dst6, 0))
882 return (EINVAL); /* XXX: should be impossible */
885 * The destination address can be specified only for a p2p or a
886 * loopback interface. If specified, the corresponding prefix length
889 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
890 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
891 /* XXX: noisy message */
892 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
893 "be specified for a p2p or a loopback IF only\n"));
897 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
898 "be 128 when dstaddr is specified\n"));
902 /* lifetime consistency check */
903 lt = &ifra->ifra_lifetime;
904 if (lt->ia6t_pltime > lt->ia6t_vltime)
906 if (lt->ia6t_vltime == 0) {
908 * the following log might be noisy, but this is a typical
909 * configuration mistake or a tool's bug.
912 "in6_update_ifa: valid lifetime is 0 for %s\n",
913 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
916 return (0); /* there's nothing to do */
920 * If this is a new address, allocate a new ifaddr and link it
926 * When in6_update_ifa() is called in a process of a received
927 * RA, it is called under an interrupt context. So, we should
928 * call malloc with M_NOWAIT.
930 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
934 bzero((caddr_t)ia, sizeof(*ia));
935 ifa_init(&ia->ia_ifa);
936 LIST_INIT(&ia->ia6_memberships);
937 /* Initialize the address and masks, and put time stamp */
938 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
939 ia->ia_addr.sin6_family = AF_INET6;
940 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
941 ia->ia6_createtime = time_second;
942 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
944 * XXX: some functions expect that ifa_dstaddr is not
945 * NULL for p2p interfaces.
947 ia->ia_ifa.ifa_dstaddr =
948 (struct sockaddr *)&ia->ia_dstaddr;
950 ia->ia_ifa.ifa_dstaddr = NULL;
952 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
954 ifa_ref(&ia->ia_ifa); /* if_addrhead */
956 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
959 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
961 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
962 IN6_IFADDR_WUNLOCK();
965 /* update timestamp */
966 ia->ia6_updatetime = time_second;
968 /* set prefix mask */
969 if (ifra->ifra_prefixmask.sin6_len) {
971 * We prohibit changing the prefix length of an existing
973 * + such an operation should be rare in IPv6, and
974 * + the operation would confuse prefix management.
976 if (ia->ia_prefixmask.sin6_len &&
977 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
978 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
979 " existing (%s) address should not be changed\n",
980 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
984 ia->ia_prefixmask = ifra->ifra_prefixmask;
988 * If a new destination address is specified, scrub the old one and
989 * install the new destination. Note that the interface must be
990 * p2p or loopback (see the check above.)
992 if (dst6.sin6_family == AF_INET6 &&
993 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
996 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
997 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
998 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
999 "a route to the old destination: %s\n",
1000 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1001 /* proceed anyway... */
1003 ia->ia_flags &= ~IFA_ROUTE;
1004 ia->ia_dstaddr = dst6;
1008 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1009 * to see if the address is deprecated or invalidated, but initialize
1010 * these members for applications.
1012 ia->ia6_lifetime = ifra->ifra_lifetime;
1013 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1014 ia->ia6_lifetime.ia6t_expire =
1015 time_second + ia->ia6_lifetime.ia6t_vltime;
1017 ia->ia6_lifetime.ia6t_expire = 0;
1018 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1019 ia->ia6_lifetime.ia6t_preferred =
1020 time_second + ia->ia6_lifetime.ia6t_pltime;
1022 ia->ia6_lifetime.ia6t_preferred = 0;
1024 /* reset the interface and routing table appropriately. */
1025 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1029 * configure address flags.
1031 ia->ia6_flags = ifra->ifra_flags;
1033 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1034 * userland, make it deprecated.
1036 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1037 ia->ia6_lifetime.ia6t_pltime = 0;
1038 ia->ia6_lifetime.ia6t_preferred = time_second;
1041 * Make the address tentative before joining multicast addresses,
1042 * so that corresponding MLD responses would not have a tentative
1045 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1046 if (hostIsNew && in6if_do_dad(ifp))
1047 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1049 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1050 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1051 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1054 * We are done if we have simply modified an existing address.
1060 * Beyond this point, we should call in6_purgeaddr upon an error,
1061 * not just go to unlink.
1064 /* Join necessary multicast groups */
1066 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1067 struct sockaddr_in6 mltaddr, mltmask;
1068 struct in6_addr llsol;
1070 /* join solicited multicast addr for new host id */
1071 bzero(&llsol, sizeof(struct in6_addr));
1072 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
1073 llsol.s6_addr32[1] = 0;
1074 llsol.s6_addr32[2] = htonl(1);
1075 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
1076 llsol.s6_addr8[12] = 0xff;
1077 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
1078 /* XXX: should not happen */
1079 log(LOG_ERR, "in6_update_ifa: "
1080 "in6_setscope failed\n");
1084 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1086 * We need a random delay for DAD on the address
1087 * being configured. It also means delaying
1088 * transmission of the corresponding MLD report to
1089 * avoid report collision.
1090 * [RFC 4861, Section 6.3.7]
1092 delay = arc4random() %
1093 (MAX_RTR_SOLICITATION_DELAY * hz);
1095 imm = in6_joingroup(ifp, &llsol, &error, delay);
1097 nd6log((LOG_WARNING,
1098 "in6_update_ifa: addmulti failed for "
1099 "%s on %s (errno=%d)\n",
1100 ip6_sprintf(ip6buf, &llsol), if_name(ifp),
1104 LIST_INSERT_HEAD(&ia->ia6_memberships,
1106 in6m_sol = imm->i6mm_maddr;
1108 bzero(&mltmask, sizeof(mltmask));
1109 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1110 mltmask.sin6_family = AF_INET6;
1111 mltmask.sin6_addr = in6mask32;
1112 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
1115 * join link-local all-nodes address
1117 bzero(&mltaddr, sizeof(mltaddr));
1118 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1119 mltaddr.sin6_family = AF_INET6;
1120 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1121 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1123 goto cleanup; /* XXX: should not fail */
1126 * XXX: do we really need this automatic routes?
1127 * We should probably reconsider this stuff. Most applications
1128 * actually do not need the routes, since they usually specify
1129 * the outgoing interface.
1131 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1133 /* XXX: only works in !SCOPEDROUTING case. */
1134 if (memcmp(&mltaddr.sin6_addr,
1135 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
1142 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
1143 (struct sockaddr *)&ia->ia_addr,
1144 (struct sockaddr *)&mltmask, RTF_UP,
1145 (struct rtentry **)0);
1152 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
1154 nd6log((LOG_WARNING,
1155 "in6_update_ifa: addmulti failed for "
1156 "%s on %s (errno=%d)\n",
1157 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1158 if_name(ifp), error));
1161 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1164 * join node information group address
1167 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1169 * The spec doesn't say anything about delay for this
1170 * group, but the same logic should apply.
1172 delay = arc4random() %
1173 (MAX_RTR_SOLICITATION_DELAY * hz);
1175 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
1176 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error,
1177 delay); /* XXX jinmei */
1179 nd6log((LOG_WARNING, "in6_update_ifa: "
1180 "addmulti failed for %s on %s "
1182 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1183 if_name(ifp), error));
1184 /* XXX not very fatal, go on... */
1186 LIST_INSERT_HEAD(&ia->ia6_memberships,
1192 * join interface-local all-nodes address.
1193 * (ff01::1%ifN, and ff01::%ifN/32)
1195 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1196 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL))
1198 goto cleanup; /* XXX: should not fail */
1199 /* XXX: again, do we really need the route? */
1200 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1202 if (memcmp(&mltaddr.sin6_addr,
1203 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
1210 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
1211 (struct sockaddr *)&ia->ia_addr,
1212 (struct sockaddr *)&mltmask, RTF_UP,
1213 (struct rtentry **)0);
1219 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
1221 nd6log((LOG_WARNING, "in6_update_ifa: "
1222 "addmulti failed for %s on %s "
1224 ip6_sprintf(ip6buf, &mltaddr.sin6_addr),
1225 if_name(ifp), error));
1228 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1233 * Perform DAD, if needed.
1234 * XXX It may be of use, if we can administratively
1237 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1238 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1240 int mindelay, maxdelay;
1243 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1245 * We need to impose a delay before sending an NS
1246 * for DAD. Check if we also needed a delay for the
1247 * corresponding MLD message. If we did, the delay
1248 * should be larger than the MLD delay (this could be
1249 * relaxed a bit, but this simple logic is at least
1251 * XXX: Break data hiding guidelines and look at
1252 * state for the solicited multicast group.
1255 if (in6m_sol != NULL &&
1256 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1257 mindelay = in6m_sol->in6m_timer;
1259 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1260 if (maxdelay - mindelay == 0)
1264 (arc4random() % (maxdelay - mindelay)) +
1268 nd6_dad_start((struct ifaddr *)ia, delay);
1271 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1272 ifa_free(&ia->ia_ifa);
1277 * XXX: if a change of an existing address failed, keep the entry
1281 in6_unlink_ifa(ia, ifp);
1282 ifa_free(&ia->ia_ifa);
1287 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1288 ifa_free(&ia->ia_ifa);
1289 in6_purgeaddr(&ia->ia_ifa);
1294 in6_purgeaddr(struct ifaddr *ifa)
1296 struct ifnet *ifp = ifa->ifa_ifp;
1297 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1298 struct in6_multi_mship *imm;
1299 struct sockaddr_in6 mltaddr, mltmask;
1302 struct ifaddr *ifa0, *nifa;
1305 * find another IPv6 address as the gateway for the
1306 * link-local and node-local all-nodes multicast
1310 TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) {
1311 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1312 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1313 &ia->ia_addr.sin6_addr,
1314 sizeof(struct in6_addr)) == 0)
1321 IF_ADDR_UNLOCK(ifp);
1324 * Remove the loopback route to the interface address.
1325 * The check for the current setting of "nd6_useloopback"
1328 if (ia->ia_flags & IFA_RTSELF) {
1329 error = ifa_del_loopback_route((struct ifaddr *)ia,
1330 (struct sockaddr *)&ia->ia_addr);
1332 ia->ia_flags &= ~IFA_RTSELF;
1335 /* stop DAD processing */
1341 * leave from multicast groups we have joined for the interface
1343 while ((imm = ia->ia6_memberships.lh_first) != NULL) {
1344 LIST_REMOVE(imm, i6mm_chain);
1345 in6_leavegroup(imm);
1349 * remove the link-local all-nodes address
1351 bzero(&mltmask, sizeof(mltmask));
1352 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1353 mltmask.sin6_family = AF_INET6;
1354 mltmask.sin6_addr = in6mask32;
1356 bzero(&mltaddr, sizeof(mltaddr));
1357 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1358 mltaddr.sin6_family = AF_INET6;
1359 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1361 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1365 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1366 if (rt != NULL && rt->rt_gateway != NULL &&
1367 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1368 &ia->ia_addr.sin6_addr,
1369 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1371 * if no more IPv6 address exists on this interface
1372 * then remove the multicast address route
1375 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1376 sizeof(mltaddr.sin6_addr));
1378 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr,
1379 (struct sockaddr *)&ia->ia_addr,
1380 (struct sockaddr *)&mltmask, RTF_UP,
1381 (struct rtentry **)0);
1383 log(LOG_INFO, "in6_purgeaddr: link-local all-nodes"
1384 "multicast address deletion error\n");
1387 * replace the gateway of the route
1389 struct sockaddr_in6 sa;
1391 bzero(&sa, sizeof(sa));
1392 sa.sin6_len = sizeof(struct sockaddr_in6);
1393 sa.sin6_family = AF_INET6;
1394 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1395 sizeof(sa.sin6_addr));
1396 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL);
1397 memcpy(rt->rt_gateway, &sa, sizeof(sa));
1406 * remove the node-local all-nodes address
1408 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1409 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) !=
1413 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL);
1414 if (rt != NULL && rt->rt_gateway != NULL &&
1415 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1416 &ia->ia_addr.sin6_addr,
1417 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1419 * if no more IPv6 address exists on this interface
1420 * then remove the multicast address route
1423 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr,
1424 sizeof(mltaddr.sin6_addr));
1427 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr,
1428 (struct sockaddr *)&ia->ia_addr,
1429 (struct sockaddr *)&mltmask, RTF_UP,
1430 (struct rtentry **)0);
1433 log(LOG_INFO, "in6_purgeaddr: node-local all-nodes"
1434 "multicast address deletion error\n");
1437 * replace the gateway of the route
1439 struct sockaddr_in6 sa;
1441 bzero(&sa, sizeof(sa));
1442 sa.sin6_len = sizeof(struct sockaddr_in6);
1443 sa.sin6_family = AF_INET6;
1444 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1445 sizeof(sa.sin6_addr));
1446 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL);
1447 memcpy(rt->rt_gateway, &sa, sizeof(sa));
1457 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1458 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1460 struct sockaddr *dstaddr;
1463 * use the interface address if configuring an
1464 * interface address with a /128 prefix len
1466 if (ia->ia_dstaddr.sin6_family == AF_INET6)
1467 dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
1469 dstaddr = (struct sockaddr *)&ia->ia_addr;
1471 error = rtrequest(RTM_DELETE,
1472 (struct sockaddr *)dstaddr,
1473 (struct sockaddr *)&ia->ia_addr,
1474 (struct sockaddr *)&ia->ia_prefixmask,
1475 ia->ia_flags | RTF_HOST, NULL);
1478 ia->ia_flags &= ~IFA_ROUTE;
1483 in6_unlink_ifa(ia, ifp);
1487 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1492 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1493 IF_ADDR_UNLOCK(ifp);
1494 ifa_free(&ia->ia_ifa); /* if_addrhead */
1497 * Defer the release of what might be the last reference to the
1498 * in6_ifaddr so that it can't be freed before the remainder of the
1502 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1503 IN6_IFADDR_WUNLOCK();
1506 * Release the reference to the base prefix. There should be a
1507 * positive reference.
1509 if (ia->ia6_ndpr == NULL) {
1511 "in6_unlink_ifa: autoconf'ed address "
1512 "%p has no prefix\n", ia));
1514 ia->ia6_ndpr->ndpr_refcnt--;
1515 ia->ia6_ndpr = NULL;
1519 * Also, if the address being removed is autoconf'ed, call
1520 * pfxlist_onlink_check() since the release might affect the status of
1521 * other (detached) addresses.
1523 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1524 pfxlist_onlink_check();
1526 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1531 in6_purgeif(struct ifnet *ifp)
1533 struct ifaddr *ifa, *nifa;
1535 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1536 if (ifa->ifa_addr->sa_family != AF_INET6)
1546 * SIOCGLIFADDR: get first address. (?)
1547 * SIOCGLIFADDR with IFLR_PREFIX:
1548 * get first address that matches the specified prefix.
1549 * SIOCALIFADDR: add the specified address.
1550 * SIOCALIFADDR with IFLR_PREFIX:
1551 * add the specified prefix, filling hostid part from
1552 * the first link-local address. prefixlen must be <= 64.
1553 * SIOCDLIFADDR: delete the specified address.
1554 * SIOCDLIFADDR with IFLR_PREFIX:
1555 * delete the first address that matches the specified prefix.
1557 * EINVAL on invalid parameters
1558 * EADDRNOTAVAIL on prefix match failed/specified address not found
1559 * other values may be returned from in6_ioctl()
1561 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1562 * this is to accomodate address naming scheme other than RFC2374,
1564 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1565 * address encoding scheme. (see figure on page 8)
1568 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1569 struct ifnet *ifp, struct thread *td)
1571 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1573 struct sockaddr *sa;
1576 if (!data || !ifp) {
1577 panic("invalid argument to in6_lifaddr_ioctl");
1583 /* address must be specified on GET with IFLR_PREFIX */
1584 if ((iflr->flags & IFLR_PREFIX) == 0)
1589 /* address must be specified on ADD and DELETE */
1590 sa = (struct sockaddr *)&iflr->addr;
1591 if (sa->sa_family != AF_INET6)
1593 if (sa->sa_len != sizeof(struct sockaddr_in6))
1595 /* XXX need improvement */
1596 sa = (struct sockaddr *)&iflr->dstaddr;
1597 if (sa->sa_family && sa->sa_family != AF_INET6)
1599 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1602 default: /* shouldn't happen */
1604 panic("invalid cmd to in6_lifaddr_ioctl");
1610 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1616 struct in6_aliasreq ifra;
1617 struct in6_addr *hostid = NULL;
1621 if ((iflr->flags & IFLR_PREFIX) != 0) {
1622 struct sockaddr_in6 *sin6;
1625 * hostid is to fill in the hostid part of the
1626 * address. hostid points to the first link-local
1627 * address attached to the interface.
1629 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1631 return EADDRNOTAVAIL;
1632 hostid = IFA_IN6(ifa);
1634 /* prefixlen must be <= 64. */
1635 if (64 < iflr->prefixlen)
1637 prefixlen = iflr->prefixlen;
1639 /* hostid part must be zero. */
1640 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1641 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1642 sin6->sin6_addr.s6_addr32[3] != 0) {
1646 prefixlen = iflr->prefixlen;
1648 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1649 bzero(&ifra, sizeof(ifra));
1650 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1652 bcopy(&iflr->addr, &ifra.ifra_addr,
1653 ((struct sockaddr *)&iflr->addr)->sa_len);
1655 /* fill in hostid part */
1656 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1657 hostid->s6_addr32[2];
1658 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1659 hostid->s6_addr32[3];
1662 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1663 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1664 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1666 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1667 hostid->s6_addr32[2];
1668 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1669 hostid->s6_addr32[3];
1675 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1676 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1678 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1679 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1684 struct in6_ifaddr *ia;
1685 struct in6_addr mask, candidate, match;
1686 struct sockaddr_in6 *sin6;
1689 bzero(&mask, sizeof(mask));
1690 if (iflr->flags & IFLR_PREFIX) {
1691 /* lookup a prefix rather than address. */
1692 in6_prefixlen2mask(&mask, iflr->prefixlen);
1694 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1695 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1696 match.s6_addr32[0] &= mask.s6_addr32[0];
1697 match.s6_addr32[1] &= mask.s6_addr32[1];
1698 match.s6_addr32[2] &= mask.s6_addr32[2];
1699 match.s6_addr32[3] &= mask.s6_addr32[3];
1701 /* if you set extra bits, that's wrong */
1702 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1707 if (cmd == SIOCGLIFADDR) {
1708 /* on getting an address, take the 1st match */
1711 /* on deleting an address, do exact match */
1712 in6_prefixlen2mask(&mask, 128);
1713 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1714 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1721 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1722 if (ifa->ifa_addr->sa_family != AF_INET6)
1728 * XXX: this is adhoc, but is necessary to allow
1729 * a user to specify fe80::/64 (not /10) for a
1730 * link-local address.
1732 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1733 in6_clearscope(&candidate);
1734 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1735 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1736 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1737 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1738 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1741 IF_ADDR_UNLOCK(ifp);
1743 return EADDRNOTAVAIL;
1746 if (cmd == SIOCGLIFADDR) {
1749 /* fill in the if_laddrreq structure */
1750 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1751 error = sa6_recoverscope(
1752 (struct sockaddr_in6 *)&iflr->addr);
1756 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1757 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1758 ia->ia_dstaddr.sin6_len);
1759 error = sa6_recoverscope(
1760 (struct sockaddr_in6 *)&iflr->dstaddr);
1764 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1767 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1769 iflr->flags = ia->ia6_flags; /* XXX */
1773 struct in6_aliasreq ifra;
1775 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1776 bzero(&ifra, sizeof(ifra));
1777 bcopy(iflr->iflr_name, ifra.ifra_name,
1778 sizeof(ifra.ifra_name));
1780 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1781 ia->ia_addr.sin6_len);
1782 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1783 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1784 ia->ia_dstaddr.sin6_len);
1786 bzero(&ifra.ifra_dstaddr,
1787 sizeof(ifra.ifra_dstaddr));
1789 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1790 ia->ia_prefixmask.sin6_len);
1792 ifra.ifra_flags = ia->ia6_flags;
1793 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1799 return EOPNOTSUPP; /* just for safety */
1803 * Initialize an interface's intetnet6 address
1804 * and routing table entry.
1807 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1808 struct sockaddr_in6 *sin6, int newhost)
1810 int error = 0, plen, ifacount = 0;
1815 * Give the interface a chance to initialize
1816 * if this is its first address,
1817 * and to validate the address if necessary.
1820 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1821 if (ifa->ifa_addr->sa_family != AF_INET6)
1825 IF_ADDR_UNLOCK(ifp);
1827 ia->ia_addr = *sin6;
1829 if (ifacount <= 1 && ifp->if_ioctl) {
1830 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1838 ia->ia_ifa.ifa_metric = ifp->if_metric;
1840 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1844 * If a new destination address is specified for a point-to-point
1845 * interface, install a route to the destination as an interface
1847 * XXX: the logic below rejects assigning multiple addresses on a p2p
1848 * interface that share the same destination.
1850 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1851 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1852 ia->ia_dstaddr.sin6_family == AF_INET6) {
1853 int rtflags = RTF_UP | RTF_HOST;
1855 error = rtrequest(RTM_ADD,
1856 (struct sockaddr *)&ia->ia_dstaddr,
1857 (struct sockaddr *)&ia->ia_addr,
1858 (struct sockaddr *)&ia->ia_prefixmask,
1859 ia->ia_flags | rtflags, NULL);
1862 ia->ia_flags |= IFA_ROUTE;
1864 * Handle the case for ::1 .
1866 if (ifp->if_flags & IFF_LOOPBACK)
1867 ia->ia_flags |= IFA_RTSELF;
1871 * add a loopback route to self
1873 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1874 error = ifa_add_loopback_route((struct ifaddr *)ia,
1875 (struct sockaddr *)&ia->ia_addr);
1877 ia->ia_flags |= IFA_RTSELF;
1880 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1882 in6_ifaddloop(&(ia->ia_ifa));
1888 * Find an IPv6 interface link-local address specific to an interface.
1889 * ifaddr is returned referenced.
1892 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1897 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1898 if (ifa->ifa_addr->sa_family != AF_INET6)
1900 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1901 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1908 IF_ADDR_UNLOCK(ifp);
1910 return ((struct in6_ifaddr *)ifa);
1915 * find the internet address corresponding to a given interface and address.
1916 * ifaddr is returned referenced.
1919 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1924 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1925 if (ifa->ifa_addr->sa_family != AF_INET6)
1927 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1932 IF_ADDR_UNLOCK(ifp);
1934 return ((struct in6_ifaddr *)ifa);
1938 * Convert IP6 address to printable (loggable) representation. Caller
1939 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1941 static char digits[] = "0123456789abcdef";
1943 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1945 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1947 const u_int16_t *a = (const u_int16_t *)addr;
1949 int dcolon = 0, zero = 0;
1953 for (i = 0; i < 8; i++) {
1954 if (*(a + i) == 0) {
1959 else if (maxcnt < cnt) {
1970 for (i = 0; i < 8; i++) {
1981 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1993 d = (const u_char *)a;
1994 /* Try to eliminate leading zeros in printout like in :0001. */
1996 *cp = digits[*d >> 4];
2001 *cp = digits[*d++ & 0xf];
2002 if (zero == 0 || (*cp != '0')) {
2006 *cp = digits[*d >> 4];
2007 if (zero == 0 || (*cp != '0')) {
2011 *cp++ = digits[*d & 0xf];
2020 in6_localaddr(struct in6_addr *in6)
2022 struct in6_ifaddr *ia;
2024 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2028 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2029 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2030 &ia->ia_prefixmask.sin6_addr)) {
2031 IN6_IFADDR_RUNLOCK();
2035 IN6_IFADDR_RUNLOCK();
2041 * Return 1 if an internet address is for the local host and configured
2042 * on one of its interfaces.
2045 in6_localip(struct in6_addr *in6)
2047 struct in6_ifaddr *ia;
2050 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2051 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2052 IN6_IFADDR_RUNLOCK();
2056 IN6_IFADDR_RUNLOCK();
2062 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2064 struct in6_ifaddr *ia;
2067 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2068 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
2070 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) {
2071 IN6_IFADDR_RUNLOCK();
2072 return (1); /* true */
2075 /* XXX: do we still have to go thru the rest of the list? */
2077 IN6_IFADDR_RUNLOCK();
2079 return (0); /* false */
2083 * return length of part which dst and src are equal
2087 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2090 u_char *s = (u_char *)src, *d = (u_char *)dst;
2091 u_char *lim = s + 16, r;
2094 if ((r = (*d++ ^ *s++)) != 0) {
2105 /* XXX: to be scope conscious */
2107 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2109 int bytelen, bitlen;
2112 if (0 > len || len > 128) {
2113 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2121 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2124 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2125 p2->s6_addr[bytelen] >> (8 - bitlen))
2132 in6_prefixlen2mask(struct in6_addr *maskp, int len)
2134 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2135 int bytelen, bitlen, i;
2138 if (0 > len || len > 128) {
2139 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2144 bzero(maskp, sizeof(*maskp));
2147 for (i = 0; i < bytelen; i++)
2148 maskp->s6_addr[i] = 0xff;
2150 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2154 * return the best address out of the same scope. if no address was
2155 * found, return the first valid address from designated IF.
2158 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2160 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2162 struct in6_ifaddr *besta = 0;
2163 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2165 dep[0] = dep[1] = NULL;
2168 * We first look for addresses in the same scope.
2169 * If there is one, return it.
2170 * If two or more, return one which matches the dst longest.
2171 * If none, return one of global addresses assigned other ifs.
2174 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2175 if (ifa->ifa_addr->sa_family != AF_INET6)
2177 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2178 continue; /* XXX: is there any case to allow anycast? */
2179 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2180 continue; /* don't use this interface */
2181 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2183 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2184 if (V_ip6_use_deprecated)
2185 dep[0] = (struct in6_ifaddr *)ifa;
2189 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2191 * call in6_matchlen() as few as possible
2195 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2196 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2199 besta = (struct in6_ifaddr *)ifa;
2202 besta = (struct in6_ifaddr *)ifa;
2206 ifa_ref(&besta->ia_ifa);
2207 IF_ADDR_UNLOCK(ifp);
2210 IF_ADDR_UNLOCK(ifp);
2213 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2214 if (ifa->ifa_addr->sa_family != AF_INET6)
2216 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2217 continue; /* XXX: is there any case to allow anycast? */
2218 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2219 continue; /* don't use this interface */
2220 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2222 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2223 if (V_ip6_use_deprecated)
2224 dep[1] = (struct in6_ifaddr *)ifa;
2230 IN6_IFADDR_RUNLOCK();
2231 return (struct in6_ifaddr *)ifa;
2233 IN6_IFADDR_RUNLOCK();
2235 /* use the last-resort values, that are, deprecated addresses */
2245 * perform DAD when interface becomes IFF_UP.
2248 in6_if_up(struct ifnet *ifp)
2251 struct in6_ifaddr *ia;
2254 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2255 if (ifa->ifa_addr->sa_family != AF_INET6)
2257 ia = (struct in6_ifaddr *)ifa;
2258 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2260 * The TENTATIVE flag was likely set by hand
2261 * beforehand, implicitly indicating the need for DAD.
2262 * We may be able to skip the random delay in this
2263 * case, but we impose delays just in case.
2266 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2269 IF_ADDR_UNLOCK(ifp);
2272 * special cases, like 6to4, are handled in in6_ifattach
2274 in6_ifattach(ifp, NULL);
2278 in6if_do_dad(struct ifnet *ifp)
2280 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2283 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2286 switch (ifp->if_type) {
2292 * These interfaces do not have the IFF_LOOPBACK flag,
2293 * but loop packets back. We do not have to do DAD on such
2294 * interfaces. We should even omit it, because loop-backed
2295 * NS would confuse the DAD procedure.
2300 * Our DAD routine requires the interface up and running.
2301 * However, some interfaces can be up before the RUNNING
2302 * status. Additionaly, users may try to assign addresses
2303 * before the interface becomes up (or running).
2304 * We simply skip DAD in such a case as a work around.
2305 * XXX: we should rather mark "tentative" on such addresses,
2306 * and do DAD after the interface becomes ready.
2308 if (!((ifp->if_flags & IFF_UP) &&
2309 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2317 * Calculate max IPv6 MTU through all the interfaces and store it
2323 unsigned long maxmtu = 0;
2326 IFNET_RLOCK_NOSLEEP();
2327 for (ifp = TAILQ_FIRST(&V_ifnet); ifp;
2328 ifp = TAILQ_NEXT(ifp, if_list)) {
2329 /* this function can be called during ifnet initialization */
2330 if (!ifp->if_afdata[AF_INET6])
2332 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2333 IN6_LINKMTU(ifp) > maxmtu)
2334 maxmtu = IN6_LINKMTU(ifp);
2336 IFNET_RUNLOCK_NOSLEEP();
2337 if (maxmtu) /* update only when maxmtu is positive */
2338 V_in6_maxmtu = maxmtu;
2342 * Provide the length of interface identifiers to be used for the link attached
2343 * to the given interface. The length should be defined in "IPv6 over
2344 * xxx-link" document. Note that address architecture might also define
2345 * the length for a particular set of address prefixes, regardless of the
2346 * link type. As clarified in rfc2462bis, those two definitions should be
2347 * consistent, and those really are as of August 2004.
2350 in6_if2idlen(struct ifnet *ifp)
2352 switch (ifp->if_type) {
2353 case IFT_ETHER: /* RFC2464 */
2354 #ifdef IFT_PROPVIRTUAL
2355 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2358 case IFT_L2VLAN: /* ditto */
2360 #ifdef IFT_IEEE80211
2361 case IFT_IEEE80211: /* ditto */
2364 case IFT_MIP: /* ditto */
2366 case IFT_INFINIBAND:
2368 case IFT_FDDI: /* RFC2467 */
2370 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2372 case IFT_PPP: /* RFC2472 */
2374 case IFT_ARCNET: /* RFC2497 */
2376 case IFT_FRELAY: /* RFC2590 */
2378 case IFT_IEEE1394: /* RFC3146 */
2381 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2383 return (64); /* XXX: is this really correct? */
2386 * Unknown link type:
2387 * It might be controversial to use the today's common constant
2388 * of 64 for these cases unconditionally. For full compliance,
2389 * we should return an error in this case. On the other hand,
2390 * if we simply miss the standard for the link type or a new
2391 * standard is defined for a new link type, the IFID length
2392 * is very likely to be the common constant. As a compromise,
2393 * we always use the constant, but make an explicit notice
2394 * indicating the "unknown" case.
2396 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2401 #include <sys/sysctl.h>
2403 struct in6_llentry {
2404 struct llentry base;
2405 struct sockaddr_in6 l3_addr6;
2408 static struct llentry *
2409 in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2411 struct in6_llentry *lle;
2413 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE,
2414 M_DONTWAIT | M_ZERO);
2415 if (lle == NULL) /* NB: caller generates msg */
2418 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2419 lle->base.lle_refcnt = 1;
2420 LLE_LOCK_INIT(&lle->base);
2421 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2422 CALLOUT_RETURNUNLOCKED);
2428 * Deletes an address from the address table.
2429 * This function is called by the timer functions
2430 * such as arptimer() and nd6_llinfo_timer(), and
2431 * the caller does the locking.
2434 in6_lltable_free(struct lltable *llt, struct llentry *lle)
2437 LLE_LOCK_DESTROY(lle);
2438 free(lle, M_LLTABLE);
2442 in6_lltable_prefix_free(struct lltable *llt,
2443 const struct sockaddr *prefix,
2444 const struct sockaddr *mask,
2447 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2448 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2449 struct llentry *lle, *next;
2453 * (flags & LLE_STATIC) means deleting all entries
2454 * including static ND6 entries
2456 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) {
2457 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2458 if (IN6_ARE_MASKED_ADDR_EQUAL(
2459 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr,
2462 ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))) {
2465 canceled = callout_drain(&lle->la_timer);
2476 in6_lltable_rtcheck(struct ifnet *ifp,
2478 const struct sockaddr *l3addr)
2481 char ip6buf[INET6_ADDRSTRLEN];
2483 KASSERT(l3addr->sa_family == AF_INET6,
2484 ("sin_family %d", l3addr->sa_family));
2486 /* XXX rtalloc1 should take a const param */
2487 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0);
2488 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2491 * Create an ND6 cache for an IPv6 neighbor
2492 * that is not covered by our own prefix.
2494 /* XXX ifaof_ifpforaddr should take a const param */
2495 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2502 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2503 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2512 static struct llentry *
2513 in6_lltable_lookup(struct lltable *llt, u_int flags,
2514 const struct sockaddr *l3addr)
2516 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2517 struct ifnet *ifp = llt->llt_ifp;
2518 struct llentry *lle;
2519 struct llentries *lleh;
2522 IF_AFDATA_LOCK_ASSERT(ifp);
2523 KASSERT(l3addr->sa_family == AF_INET6,
2524 ("sin_family %d", l3addr->sa_family));
2526 hashkey = sin6->sin6_addr.s6_addr32[3];
2527 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2528 LIST_FOREACH(lle, lleh, lle_next) {
2529 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2530 if (lle->la_flags & LLE_DELETED)
2532 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2533 sizeof(struct in6_addr)) == 0)
2538 if (!(flags & LLE_CREATE))
2541 * A route that covers the given address must have
2542 * been installed 1st because we are doing a resolution,
2545 if (!(flags & LLE_IFADDR) &&
2546 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2549 lle = in6_lltable_new(l3addr, flags);
2551 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2554 lle->la_flags = flags & ~LLE_CREATE;
2555 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2556 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2557 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2561 lle->lle_head = lleh;
2562 LIST_INSERT_HEAD(lleh, lle, lle_next);
2563 } else if (flags & LLE_DELETE) {
2564 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2566 lle->la_flags = LLE_DELETED;
2569 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2574 if (LLE_IS_VALID(lle)) {
2575 if (flags & LLE_EXCLUSIVE)
2584 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2586 struct ifnet *ifp = llt->llt_ifp;
2587 struct llentry *lle;
2590 struct rt_msghdr rtm;
2591 struct sockaddr_in6 sin6;
2593 * ndp.c assumes that sdl is word aligned
2598 struct sockaddr_dl sdl;
2602 if (ifp->if_flags & IFF_LOOPBACK)
2605 LLTABLE_LOCK_ASSERT();
2608 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2609 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2610 struct sockaddr_dl *sdl;
2612 /* skip deleted or invalid entries */
2613 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2615 /* Skip if jailed and not a valid IP of the prison. */
2616 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2619 * produce a msg made of:
2621 * struct sockaddr_in6 (IPv6)
2622 * struct sockaddr_dl;
2624 bzero(&ndpc, sizeof(ndpc));
2625 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2626 ndpc.rtm.rtm_version = RTM_VERSION;
2627 ndpc.rtm.rtm_type = RTM_GET;
2628 ndpc.rtm.rtm_flags = RTF_UP;
2629 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2630 ndpc.sin6.sin6_family = AF_INET6;
2631 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2632 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2635 if (lle->la_flags & LLE_PUB)
2636 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2639 sdl->sdl_family = AF_LINK;
2640 sdl->sdl_len = sizeof(*sdl);
2641 sdl->sdl_alen = ifp->if_addrlen;
2642 sdl->sdl_index = ifp->if_index;
2643 sdl->sdl_type = ifp->if_type;
2644 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2645 ndpc.rtm.rtm_rmx.rmx_expire =
2646 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2647 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2648 if (lle->la_flags & LLE_STATIC)
2649 ndpc.rtm.rtm_flags |= RTF_STATIC;
2650 ndpc.rtm.rtm_index = ifp->if_index;
2651 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2660 in6_domifattach(struct ifnet *ifp)
2662 struct in6_ifextra *ext;
2664 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2665 bzero(ext, sizeof(*ext));
2667 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2668 M_IFADDR, M_WAITOK);
2669 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2672 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2673 M_IFADDR, M_WAITOK);
2674 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2676 ext->nd_ifinfo = nd6_ifattach(ifp);
2677 ext->scope6_id = scope6_ifattach(ifp);
2678 ext->lltable = lltable_init(ifp, AF_INET6);
2679 if (ext->lltable != NULL) {
2680 ext->lltable->llt_free = in6_lltable_free;
2681 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2682 ext->lltable->llt_lookup = in6_lltable_lookup;
2683 ext->lltable->llt_dump = in6_lltable_dump;
2686 ext->mld_ifinfo = mld_domifattach(ifp);
2692 in6_domifdetach(struct ifnet *ifp, void *aux)
2694 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2696 mld_domifdetach(ifp);
2697 scope6_ifdetach(ext->scope6_id);
2698 nd6_ifdetach(ext->nd_ifinfo);
2699 lltable_free(ext->lltable);
2700 free(ext->in6_ifstat, M_IFADDR);
2701 free(ext->icmp6_ifstat, M_IFADDR);
2702 free(ext, M_IFADDR);
2706 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2707 * v4 mapped addr or v4 compat addr
2710 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2713 bzero(sin, sizeof(*sin));
2714 sin->sin_len = sizeof(struct sockaddr_in);
2715 sin->sin_family = AF_INET;
2716 sin->sin_port = sin6->sin6_port;
2717 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2720 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2722 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2724 bzero(sin6, sizeof(*sin6));
2725 sin6->sin6_len = sizeof(struct sockaddr_in6);
2726 sin6->sin6_family = AF_INET6;
2727 sin6->sin6_port = sin->sin_port;
2728 sin6->sin6_addr.s6_addr32[0] = 0;
2729 sin6->sin6_addr.s6_addr32[1] = 0;
2730 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2731 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2734 /* Convert sockaddr_in6 into sockaddr_in. */
2736 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2738 struct sockaddr_in *sin_p;
2739 struct sockaddr_in6 sin6;
2742 * Save original sockaddr_in6 addr and convert it
2745 sin6 = *(struct sockaddr_in6 *)nam;
2746 sin_p = (struct sockaddr_in *)nam;
2747 in6_sin6_2_sin(sin_p, &sin6);
2750 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2752 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2754 struct sockaddr_in *sin_p;
2755 struct sockaddr_in6 *sin6_p;
2757 sin6_p = malloc(sizeof *sin6_p, M_SONAME,
2759 sin_p = (struct sockaddr_in *)*nam;
2760 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2761 free(*nam, M_SONAME);
2762 *nam = (struct sockaddr *)sin6_p;