1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6.c,v 1.26 2008/01/05 14:02:40 swildner Exp $ */
3 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66 * @(#)in.c 8.2 (Berkeley) 11/15/93
70 #include "opt_inet6.h"
72 #include <sys/param.h>
73 #include <sys/errno.h>
74 #include <sys/malloc.h>
75 #include <sys/socket.h>
76 #include <sys/socketvar.h>
77 #include <sys/sockio.h>
78 #include <sys/systm.h>
81 #include <sys/kernel.h>
82 #include <sys/syslog.h>
83 #include <sys/thread2.h>
86 #include <net/if_types.h>
87 #include <net/route.h>
88 #include <net/if_dl.h>
90 #include <netinet/in.h>
91 #include <netinet/in_var.h>
92 #include <netinet/if_ether.h>
93 #include <netinet/in_systm.h>
94 #include <netinet/ip.h>
95 #include <netinet/in_pcb.h>
97 #include <netinet/ip6.h>
98 #include <netinet6/ip6_var.h>
99 #include <netinet6/nd6.h>
100 #include <netinet6/mld6_var.h>
101 #include <netinet6/ip6_mroute.h>
102 #include <netinet6/in6_ifattach.h>
103 #include <netinet6/scope6_var.h>
104 #include <netinet6/in6_pcb.h>
105 #include <netinet6/in6_var.h>
107 #include <net/net_osdep.h>
110 * Definitions of some costant IP6 addresses.
112 const struct in6_addr kin6addr_any
= IN6ADDR_ANY_INIT
;
113 const struct in6_addr kin6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
114 const struct in6_addr kin6addr_nodelocal_allnodes
=
115 IN6ADDR_NODELOCAL_ALLNODES_INIT
;
116 const struct in6_addr kin6addr_linklocal_allnodes
=
117 IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
118 const struct in6_addr kin6addr_linklocal_allrouters
=
119 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
121 const struct in6_addr in6mask0
= IN6MASK0
;
122 const struct in6_addr in6mask32
= IN6MASK32
;
123 const struct in6_addr in6mask64
= IN6MASK64
;
124 const struct in6_addr in6mask96
= IN6MASK96
;
125 const struct in6_addr in6mask128
= IN6MASK128
;
127 const struct sockaddr_in6 sa6_any
= {sizeof(sa6_any
), AF_INET6
,
128 0, 0, IN6ADDR_ANY_INIT
, 0};
130 static int in6_lifaddr_ioctl (struct socket
*, u_long
, caddr_t
,
131 struct ifnet
*, struct thread
*);
132 static int in6_ifinit (struct ifnet
*, struct in6_ifaddr
*,
133 struct sockaddr_in6
*, int);
134 static void in6_unlink_ifa (struct in6_ifaddr
*, struct ifnet
*);
135 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo
*, struct rtentry
*, void *);
137 struct in6_multihead in6_multihead
; /* XXX BSS initialization */
139 int (*faithprefix_p
)(struct in6_addr
*);
142 * Subroutine for in6_ifaddloop() and in6_ifremloop().
143 * This routine does actual work.
146 in6_ifloop_request(int cmd
, struct ifaddr
*ifa
)
148 struct sockaddr_in6 all1_sa
;
149 struct rt_addrinfo rtinfo
;
152 bzero(&all1_sa
, sizeof(all1_sa
));
153 all1_sa
.sin6_family
= AF_INET6
;
154 all1_sa
.sin6_len
= sizeof(struct sockaddr_in6
);
155 all1_sa
.sin6_addr
= in6mask128
;
158 * We specify the address itself as the gateway, and set the
159 * RTF_LLINFO flag, so that the corresponding host route would have
160 * the flag, and thus applications that assume traditional behavior
161 * would be happy. Note that we assume the caller of the function
162 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
163 * which changes the outgoing interface to the loopback interface.
165 bzero(&rtinfo
, sizeof(struct rt_addrinfo
));
166 rtinfo
.rti_info
[RTAX_DST
] = ifa
->ifa_addr
;
167 rtinfo
.rti_info
[RTAX_GATEWAY
] = ifa
->ifa_addr
;
168 rtinfo
.rti_info
[RTAX_NETMASK
] = (struct sockaddr
*)&all1_sa
;
169 rtinfo
.rti_flags
= RTF_UP
|RTF_HOST
|RTF_LLINFO
;
171 error
= rtrequest1_global(cmd
, &rtinfo
,
172 in6_ifloop_request_callback
, ifa
);
174 log(LOG_ERR
, "in6_ifloop_request: "
175 "%s operation failed for %s (errno=%d)\n",
176 cmd
== RTM_ADD
? "ADD" : "DELETE",
177 ip6_sprintf(&((struct in6_ifaddr
*)ifa
)->ia_addr
.sin6_addr
),
183 in6_ifloop_request_callback(int cmd
, int error
, struct rt_addrinfo
*rtinfo
,
184 struct rtentry
*rt
, void *arg
)
186 struct ifaddr
*ifa
= arg
;
192 * Make sure rt_ifa be equal to IFA, the second argument of the
194 * We need this because when we refer to rt_ifa->ia6_flags in
195 * ip6_input, we assume that the rt_ifa points to the address instead
196 * of the loopback address.
198 if (cmd
== RTM_ADD
&& rt
&& ifa
!= rt
->rt_ifa
) {
207 * Report the addition/removal of the address to the routing socket.
208 * XXX: since we called rtinit for a p2p interface with a destination,
209 * we end up reporting twice in such a case. Should we rather
210 * omit the second report?
214 rt_newaddrmsg(cmd
, ifa
, error
, rt
);
215 if (cmd
== RTM_DELETE
) {
216 if (rt
->rt_refcnt
== 0) {
223 /* no way to return any new error */
228 * Add ownaddr as loopback rtentry. We previously add the route only if
229 * necessary (ex. on a p2p link). However, since we now manage addresses
230 * separately from prefixes, we should always add the route. We can't
231 * rely on the cloning mechanism from the corresponding interface route
235 in6_ifaddloop(struct ifaddr
*ifa
)
239 /* If there is no loopback entry, allocate one. */
240 rt
= rtpurelookup(ifa
->ifa_addr
);
241 if (rt
== NULL
|| !(rt
->rt_flags
& RTF_HOST
) ||
242 !(rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
))
243 in6_ifloop_request(RTM_ADD
, ifa
);
249 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
253 in6_ifremloop(struct ifaddr
*ifa
)
255 struct in6_ifaddr
*ia
;
260 * Some of BSD variants do not remove cloned routes
261 * from an interface direct route, when removing the direct route
262 * (see comments in net/net_osdep.h). Even for variants that do remove
263 * cloned routes, they could fail to remove the cloned routes when
264 * we handle multple addresses that share a common prefix.
265 * So, we should remove the route corresponding to the deleted address
266 * regardless of the result of in6_is_ifloop_auto().
270 * Delete the entry only if exact one ifa exists. More than one ifa
271 * can exist if we assign a same single address to multiple
272 * (probably p2p) interfaces.
273 * XXX: we should avoid such a configuration in IPv6...
275 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
276 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa
), &ia
->ia_addr
.sin6_addr
)) {
285 * Before deleting, check if a corresponding loopbacked host
286 * route surely exists. With this check, we can avoid to
287 * delete an interface direct route whose destination is same
288 * as the address being removed. This can happen when remofing
289 * a subnet-router anycast address on an interface attahced
290 * to a shared medium.
292 rt
= rtpurelookup(ifa
->ifa_addr
);
293 if (rt
!= NULL
&& (rt
->rt_flags
& RTF_HOST
) &&
294 (rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
)) {
296 in6_ifloop_request(RTM_DELETE
, ifa
);
302 in6_ifindex2scopeid(int idx
)
306 struct sockaddr_in6
*sin6
;
308 if (idx
< 0 || if_index
< idx
)
310 ifp
= ifindex2ifnet
[idx
];
312 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
314 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
316 sin6
= (struct sockaddr_in6
*)ifa
->ifa_addr
;
317 if (IN6_IS_ADDR_SITELOCAL(&sin6
->sin6_addr
))
318 return sin6
->sin6_scope_id
& 0xffff;
325 in6_mask2len(struct in6_addr
*mask
, u_char
*lim0
)
328 u_char
*lim
= lim0
, *p
;
331 lim0
- (u_char
*)mask
> sizeof(*mask
)) /* ignore the scope_id part */
332 lim
= (u_char
*)mask
+ sizeof(*mask
);
333 for (p
= (u_char
*)mask
; p
< lim
; x
++, p
++) {
339 for (y
= 0; y
< 8; y
++) {
340 if ((*p
& (0x80 >> y
)) == 0)
346 * when the limit pointer is given, do a stricter check on the
350 if (y
!= 0 && (*p
& (0x00ff >> y
)) != 0)
352 for (p
= p
+ 1; p
< lim
; p
++)
361 in6_len2mask(struct in6_addr
*mask
, int len
)
365 bzero(mask
, sizeof(*mask
));
366 for (i
= 0; i
< len
/ 8; i
++)
367 mask
->s6_addr8
[i
] = 0xff;
369 mask
->s6_addr8
[i
] = (0xff00 >> (len
% 8)) & 0xff;
372 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
373 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
376 in6_control(struct socket
*so
, u_long cmd
, caddr_t data
,
377 struct ifnet
*ifp
, struct thread
*td
)
379 struct in6_ifreq
*ifr
= (struct in6_ifreq
*)data
;
380 struct in6_ifaddr
*ia
= NULL
;
381 struct in6_aliasreq
*ifra
= (struct in6_aliasreq
*)data
;
390 case SIOCGETSGCNT_IN6
:
391 case SIOCGETMIFCNT_IN6
:
392 return (mrt6_ioctl(cmd
, data
));
399 case SIOCSNDFLUSH_IN6
:
400 case SIOCSPFXFLUSH_IN6
:
401 case SIOCSRTRFLUSH_IN6
:
402 case SIOCSDEFIFACE_IN6
:
403 case SIOCSIFINFO_FLAGS
:
407 case OSIOCGIFINFO_IN6
:
408 case SIOCGIFINFO_IN6
:
411 case SIOCGNBRINFO_IN6
:
412 case SIOCGDEFIFACE_IN6
:
413 return (nd6_ioctl(cmd
, data
, ifp
));
417 case SIOCSIFPREFIX_IN6
:
418 case SIOCDIFPREFIX_IN6
:
419 case SIOCAIFPREFIX_IN6
:
420 case SIOCCIFPREFIX_IN6
:
421 case SIOCSGIFPREFIX_IN6
:
422 case SIOCGIFPREFIX_IN6
:
424 "prefix ioctls are now invalidated. "
425 "please use ifconfig.\n");
433 return (scope6_set(ifp
,
434 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
437 return (scope6_get(ifp
,
438 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
441 return (scope6_get_default((struct scope6_id
*)
442 ifr
->ifr_ifru
.ifru_scope_id
));
453 return in6_lifaddr_ioctl(so
, cmd
, data
, ifp
, td
);
457 * Find address for this interface, if it exists.
459 if (ifra
->ifra_addr
.sin6_family
== AF_INET6
) { /* XXX */
460 struct sockaddr_in6
*sa6
=
461 (struct sockaddr_in6
*)&ifra
->ifra_addr
;
463 if (IN6_IS_ADDR_LINKLOCAL(&sa6
->sin6_addr
)) {
464 if (sa6
->sin6_addr
.s6_addr16
[1] == 0) {
465 /* link ID is not embedded by the user */
466 sa6
->sin6_addr
.s6_addr16
[1] =
467 htons(ifp
->if_index
);
468 } else if (sa6
->sin6_addr
.s6_addr16
[1] !=
469 htons(ifp
->if_index
)) {
470 return (EINVAL
); /* link ID contradicts */
472 if (sa6
->sin6_scope_id
) {
473 if (sa6
->sin6_scope_id
!=
474 (u_int32_t
)ifp
->if_index
)
476 sa6
->sin6_scope_id
= 0; /* XXX: good way? */
479 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
483 case SIOCSIFADDR_IN6
:
484 case SIOCSIFDSTADDR_IN6
:
485 case SIOCSIFNETMASK_IN6
:
487 * Since IPv6 allows a node to assign multiple addresses
488 * on a single interface, SIOCSIFxxx ioctls are not suitable
489 * and should be unused.
491 /* we decided to obsolete this command (20000704) */
494 case SIOCDIFADDR_IN6
:
496 * for IPv4, we look for existing in_ifaddr here to allow
497 * "ifconfig if0 delete" to remove first IPv4 address on the
498 * interface. For IPv6, as the spec allow multiple interface
499 * address from the day one, we consider "remove the first one"
500 * semantics to be not preferable.
503 return (EADDRNOTAVAIL
);
505 case SIOCAIFADDR_IN6
:
507 * We always require users to specify a valid IPv6 address for
508 * the corresponding operation.
510 if (ifra
->ifra_addr
.sin6_family
!= AF_INET6
||
511 ifra
->ifra_addr
.sin6_len
!= sizeof(struct sockaddr_in6
))
512 return (EAFNOSUPPORT
);
518 case SIOCGIFADDR_IN6
:
519 /* This interface is basically deprecated. use SIOCGIFCONF. */
521 case SIOCGIFAFLAG_IN6
:
522 case SIOCGIFNETMASK_IN6
:
523 case SIOCGIFDSTADDR_IN6
:
524 case SIOCGIFALIFETIME_IN6
:
525 /* must think again about its semantics */
527 return (EADDRNOTAVAIL
);
529 case SIOCSIFALIFETIME_IN6
:
531 struct in6_addrlifetime
*lt
;
536 return (EADDRNOTAVAIL
);
537 /* sanity for overflow - beware unsigned */
538 lt
= &ifr
->ifr_ifru
.ifru_lifetime
;
539 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
540 && lt
->ia6t_vltime
+ time_second
< time_second
) {
543 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
544 && lt
->ia6t_pltime
+ time_second
< time_second
) {
553 case SIOCGIFADDR_IN6
:
554 ifr
->ifr_addr
= ia
->ia_addr
;
557 case SIOCGIFDSTADDR_IN6
:
558 if (!(ifp
->if_flags
& IFF_POINTOPOINT
))
561 * XXX: should we check if ifa_dstaddr is NULL and return
564 ifr
->ifr_dstaddr
= ia
->ia_dstaddr
;
567 case SIOCGIFNETMASK_IN6
:
568 ifr
->ifr_addr
= ia
->ia_prefixmask
;
571 case SIOCGIFAFLAG_IN6
:
572 ifr
->ifr_ifru
.ifru_flags6
= ia
->ia6_flags
;
575 case SIOCGIFSTAT_IN6
:
578 bzero(&ifr
->ifr_ifru
.ifru_stat
,
579 sizeof(ifr
->ifr_ifru
.ifru_stat
));
580 ifr
->ifr_ifru
.ifru_stat
=
581 *((struct in6_ifextra
*)ifp
->if_afdata
[AF_INET6
])->in6_ifstat
;
584 case SIOCGIFSTAT_ICMP6
:
585 bzero(&ifr
->ifr_ifru
.ifru_stat
,
586 sizeof(ifr
->ifr_ifru
.ifru_icmp6stat
));
587 ifr
->ifr_ifru
.ifru_icmp6stat
=
588 *((struct in6_ifextra
*)ifp
->if_afdata
[AF_INET6
])->icmp6_ifstat
;
591 case SIOCGIFALIFETIME_IN6
:
592 ifr
->ifr_ifru
.ifru_lifetime
= ia
->ia6_lifetime
;
595 case SIOCSIFALIFETIME_IN6
:
596 ia
->ia6_lifetime
= ifr
->ifr_ifru
.ifru_lifetime
;
598 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
599 ia
->ia6_lifetime
.ia6t_expire
=
600 time_second
+ ia
->ia6_lifetime
.ia6t_vltime
;
602 ia
->ia6_lifetime
.ia6t_expire
= 0;
603 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
604 ia
->ia6_lifetime
.ia6t_preferred
=
605 time_second
+ ia
->ia6_lifetime
.ia6t_pltime
;
607 ia
->ia6_lifetime
.ia6t_preferred
= 0;
610 case SIOCAIFADDR_IN6
:
613 struct nd_prefix pr0
, *pr
;
616 * first, make or update the interface address structure,
617 * and link it to the list.
619 if ((error
= in6_update_ifa(ifp
, ifra
, ia
)) != 0)
623 * then, make the prefix on-link on the interface.
624 * XXX: we'd rather create the prefix before the address, but
625 * we need at least one address to install the corresponding
626 * interface route, so we configure the address first.
630 * convert mask to prefix length (prefixmask has already
631 * been validated in in6_update_ifa().
633 bzero(&pr0
, sizeof(pr0
));
635 pr0
.ndpr_plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
637 if (pr0
.ndpr_plen
== 128)
638 break; /* we don't need to install a host route. */
639 pr0
.ndpr_prefix
= ifra
->ifra_addr
;
640 pr0
.ndpr_mask
= ifra
->ifra_prefixmask
.sin6_addr
;
641 /* apply the mask for safety. */
642 for (i
= 0; i
< 4; i
++) {
643 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
644 ifra
->ifra_prefixmask
.sin6_addr
.s6_addr32
[i
];
647 * XXX: since we don't have an API to set prefix (not address)
648 * lifetimes, we just use the same lifetimes as addresses.
649 * The (temporarily) installed lifetimes can be overridden by
650 * later advertised RAs (when accept_rtadv is non 0), which is
651 * an intended behavior.
653 pr0
.ndpr_raf_onlink
= 1; /* should be configurable? */
655 ((ifra
->ifra_flags
& IN6_IFF_AUTOCONF
) != 0);
656 pr0
.ndpr_vltime
= ifra
->ifra_lifetime
.ia6t_vltime
;
657 pr0
.ndpr_pltime
= ifra
->ifra_lifetime
.ia6t_pltime
;
659 /* add the prefix if there's one. */
660 if ((pr
= nd6_prefix_lookup(&pr0
)) == NULL
) {
662 * nd6_prelist_add will install the corresponding
665 if ((error
= nd6_prelist_add(&pr0
, NULL
, &pr
)) != 0)
668 log(LOG_ERR
, "nd6_prelist_add succedded but "
670 return (EINVAL
); /* XXX panic here? */
673 if ((ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
))
675 /* XXX: this should not happen! */
676 log(LOG_ERR
, "in6_control: addition succeeded, but"
679 if ((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
680 ia
->ia6_ndpr
== NULL
) { /* new autoconfed addr */
685 * If this is the first autoconf address from
686 * the prefix, create a temporary address
687 * as well (when specified).
689 if (ip6_use_tempaddr
&&
690 pr
->ndpr_refcnt
== 1) {
692 if ((e
= in6_tmpifadd(ia
, 1)) != 0) {
693 log(LOG_NOTICE
, "in6_control: "
694 "failed to create a "
695 "temporary address, "
703 * this might affect the status of autoconfigured
704 * addresses, that is, this address might make
705 * other addresses detached.
707 pfxlist_onlink_check();
709 if (error
== 0 && ia
)
710 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
);
714 case SIOCDIFADDR_IN6
:
717 struct nd_prefix pr0
, *pr
;
720 * If the address being deleted is the only one that owns
721 * the corresponding prefix, expire the prefix as well.
722 * XXX: theoretically, we don't have to warry about such
723 * relationship, since we separate the address management
724 * and the prefix management. We do this, however, to provide
725 * as much backward compatibility as possible in terms of
726 * the ioctl operation.
728 bzero(&pr0
, sizeof(pr0
));
730 pr0
.ndpr_plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
732 if (pr0
.ndpr_plen
== 128)
734 pr0
.ndpr_prefix
= ia
->ia_addr
;
735 pr0
.ndpr_mask
= ia
->ia_prefixmask
.sin6_addr
;
736 for (i
= 0; i
< 4; i
++) {
737 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
738 ia
->ia_prefixmask
.sin6_addr
.s6_addr32
[i
];
741 * The logic of the following condition is a bit complicated.
742 * We expire the prefix when
743 * 1. the address obeys autoconfiguration and it is the
744 * only owner of the associated prefix, or
745 * 2. the address does not obey autoconf and there is no
746 * other owner of the prefix.
748 if ((pr
= nd6_prefix_lookup(&pr0
)) != NULL
&&
749 (((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
750 pr
->ndpr_refcnt
== 1) ||
751 (!(ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
752 pr
->ndpr_refcnt
== 0))) {
753 pr
->ndpr_expire
= 1; /* XXX: just for expiration */
757 in6_purgeaddr(&ia
->ia_ifa
);
758 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
);
763 if (ifp
== NULL
|| ifp
->if_ioctl
== 0)
765 lwkt_serialize_enter(ifp
->if_serializer
);
766 error
= ifp
->if_ioctl(ifp
, cmd
, data
, td
->td_proc
->p_ucred
);
767 lwkt_serialize_exit(ifp
->if_serializer
);
775 * Update parameters of an IPv6 interface address.
776 * If necessary, a new entry is created and linked into address chains.
777 * This function is separated from in6_control().
778 * XXX: should this be performed under splnet()?
781 in6_update_ifa(struct ifnet
*ifp
, struct in6_aliasreq
*ifra
,
782 struct in6_ifaddr
*ia
)
784 int error
= 0, hostIsNew
= 0, plen
= -1;
785 struct in6_ifaddr
*oia
;
786 struct sockaddr_in6 dst6
;
787 struct in6_addrlifetime
*lt
;
789 /* Validate parameters */
790 if (ifp
== NULL
|| ifra
== NULL
) /* this maybe redundant */
794 * The destination address for a p2p link must have a family
795 * of AF_UNSPEC or AF_INET6.
797 if ((ifp
->if_flags
& IFF_POINTOPOINT
) &&
798 ifra
->ifra_dstaddr
.sin6_family
!= AF_INET6
&&
799 ifra
->ifra_dstaddr
.sin6_family
!= AF_UNSPEC
)
800 return (EAFNOSUPPORT
);
802 * validate ifra_prefixmask. don't check sin6_family, netmask
803 * does not carry fields other than sin6_len.
805 if (ifra
->ifra_prefixmask
.sin6_len
> sizeof(struct sockaddr_in6
))
808 * Because the IPv6 address architecture is classless, we require
809 * users to specify a (non 0) prefix length (mask) for a new address.
810 * We also require the prefix (when specified) mask is valid, and thus
811 * reject a non-consecutive mask.
813 if (ia
== NULL
&& ifra
->ifra_prefixmask
.sin6_len
== 0)
815 if (ifra
->ifra_prefixmask
.sin6_len
!= 0) {
816 plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
817 (u_char
*)&ifra
->ifra_prefixmask
+
818 ifra
->ifra_prefixmask
.sin6_len
);
824 * In this case, ia must not be NULL. We just use its prefix
827 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
);
830 * If the destination address on a p2p interface is specified,
831 * and the address is a scoped one, validate/set the scope
834 dst6
= ifra
->ifra_dstaddr
;
835 if ((ifp
->if_flags
& (IFF_POINTOPOINT
|IFF_LOOPBACK
)) &&
836 (dst6
.sin6_family
== AF_INET6
)) {
839 if ((error
= in6_recoverscope(&dst6
,
840 &ifra
->ifra_dstaddr
.sin6_addr
,
843 scopeid
= in6_addr2scopeid(ifp
, &dst6
.sin6_addr
);
844 if (dst6
.sin6_scope_id
== 0) /* user omit to specify the ID. */
845 dst6
.sin6_scope_id
= scopeid
;
846 else if (dst6
.sin6_scope_id
!= scopeid
)
847 return (EINVAL
); /* scope ID mismatch. */
848 if ((error
= in6_embedscope(&dst6
.sin6_addr
, &dst6
, NULL
, NULL
))
851 dst6
.sin6_scope_id
= 0; /* XXX */
854 * The destination address can be specified only for a p2p or a
855 * loopback interface. If specified, the corresponding prefix length
858 if (ifra
->ifra_dstaddr
.sin6_family
== AF_INET6
) {
859 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) == 0) {
860 /* XXX: noisy message */
861 log(LOG_INFO
, "in6_update_ifa: a destination can be "
862 "specified for a p2p or a loopback IF only\n");
867 * The following message seems noisy, but we dare to
868 * add it for diagnosis.
870 log(LOG_INFO
, "in6_update_ifa: prefixlen must be 128 "
871 "when dstaddr is specified\n");
875 /* lifetime consistency check */
876 lt
= &ifra
->ifra_lifetime
;
877 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
878 && lt
->ia6t_vltime
+ time_second
< time_second
) {
881 if (lt
->ia6t_vltime
== 0) {
883 * the following log might be noisy, but this is a typical
884 * configuration mistake or a tool's bug.
887 "in6_update_ifa: valid lifetime is 0 for %s\n",
888 ip6_sprintf(&ifra
->ifra_addr
.sin6_addr
));
890 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
891 && lt
->ia6t_pltime
+ time_second
< time_second
) {
896 * If this is a new address, allocate a new ifaddr and link it
902 * When in6_update_ifa() is called in a process of a received
903 * RA, it is called under splnet(). So, we should call malloc
906 ia
= (struct in6_ifaddr
*)
907 kmalloc(sizeof(*ia
), M_IFADDR
, M_NOWAIT
| M_ZERO
);
910 /* Initialize the address and masks */
911 ia
->ia_ifa
.ifa_addr
= (struct sockaddr
*)&ia
->ia_addr
;
912 ia
->ia_addr
.sin6_family
= AF_INET6
;
913 ia
->ia_addr
.sin6_len
= sizeof(ia
->ia_addr
);
914 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) != 0) {
916 * XXX: some functions expect that ifa_dstaddr is not
917 * NULL for p2p interfaces.
919 ia
->ia_ifa
.ifa_dstaddr
920 = (struct sockaddr
*)&ia
->ia_dstaddr
;
922 ia
->ia_ifa
.ifa_dstaddr
= NULL
;
924 ia
->ia_ifa
.ifa_netmask
925 = (struct sockaddr
*)&ia
->ia_prefixmask
;
928 if ((oia
= in6_ifaddr
) != NULL
) {
929 for ( ; oia
->ia_next
; oia
= oia
->ia_next
)
935 TAILQ_INSERT_TAIL(&ifp
->if_addrlist
, &ia
->ia_ifa
,
939 /* set prefix mask */
940 if (ifra
->ifra_prefixmask
.sin6_len
) {
942 * We prohibit changing the prefix length of an existing
944 * + such an operation should be rare in IPv6, and
945 * + the operation would confuse prefix management.
947 if (ia
->ia_prefixmask
.sin6_len
&&
948 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
) != plen
) {
949 log(LOG_INFO
, "in6_update_ifa: the prefix length of an"
950 " existing (%s) address should not be changed\n",
951 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
955 ia
->ia_prefixmask
= ifra
->ifra_prefixmask
;
959 * If a new destination address is specified, scrub the old one and
960 * install the new destination. Note that the interface must be
961 * p2p or loopback (see the check above.)
963 if (dst6
.sin6_family
== AF_INET6
&&
964 !IN6_ARE_ADDR_EQUAL(&dst6
.sin6_addr
,
965 &ia
->ia_dstaddr
.sin6_addr
)) {
968 if ((ia
->ia_flags
& IFA_ROUTE
) &&
969 (e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
971 log(LOG_ERR
, "in6_update_ifa: failed to remove "
972 "a route to the old destination: %s\n",
973 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
974 /* proceed anyway... */
977 ia
->ia_flags
&= ~IFA_ROUTE
;
978 ia
->ia_dstaddr
= dst6
;
981 /* reset the interface and routing table appropriately. */
982 if ((error
= in6_ifinit(ifp
, ia
, &ifra
->ifra_addr
, hostIsNew
)) != 0)
986 * Beyond this point, we should call in6_purgeaddr upon an error,
987 * not just go to unlink.
990 #if 0 /* disable this mechanism for now */
991 /* update prefix list */
993 (ifra
->ifra_flags
& IN6_IFF_NOPFX
) == 0) { /* XXX */
996 iilen
= (sizeof(ia
->ia_prefixmask
.sin6_addr
) << 3) - plen
;
997 if ((error
= in6_prefix_add_ifid(iilen
, ia
)) != 0) {
998 in6_purgeaddr((struct ifaddr
*)ia
);
1004 if (ifp
->if_flags
& IFF_MULTICAST
) {
1005 struct sockaddr_in6 mltaddr
, mltmask
;
1006 struct in6_multi
*in6m
;
1010 * join solicited multicast addr for new host id
1012 struct in6_addr llsol
;
1013 bzero(&llsol
, sizeof(struct in6_addr
));
1014 llsol
.s6_addr16
[0] = htons(0xff02);
1015 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1016 llsol
.s6_addr32
[1] = 0;
1017 llsol
.s6_addr32
[2] = htonl(1);
1018 llsol
.s6_addr32
[3] =
1019 ifra
->ifra_addr
.sin6_addr
.s6_addr32
[3];
1020 llsol
.s6_addr8
[12] = 0xff;
1021 in6_addmulti(&llsol
, ifp
, &error
);
1024 "in6_update_ifa: addmulti failed for "
1025 "%s on %s (errno=%d)\n",
1026 ip6_sprintf(&llsol
), if_name(ifp
),
1028 in6_purgeaddr((struct ifaddr
*)ia
);
1033 bzero(&mltmask
, sizeof(mltmask
));
1034 mltmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1035 mltmask
.sin6_family
= AF_INET6
;
1036 mltmask
.sin6_addr
= in6mask32
;
1039 * join link-local all-nodes address
1041 bzero(&mltaddr
, sizeof(mltaddr
));
1042 mltaddr
.sin6_len
= sizeof(struct sockaddr_in6
);
1043 mltaddr
.sin6_family
= AF_INET6
;
1044 mltaddr
.sin6_addr
= kin6addr_linklocal_allnodes
;
1045 mltaddr
.sin6_addr
.s6_addr16
[1] = htons(ifp
->if_index
);
1047 IN6_LOOKUP_MULTI(mltaddr
.sin6_addr
, ifp
, in6m
);
1049 rtrequest_global(RTM_ADD
,
1050 (struct sockaddr
*)&mltaddr
,
1051 (struct sockaddr
*)&ia
->ia_addr
,
1052 (struct sockaddr
*)&mltmask
,
1053 RTF_UP
|RTF_CLONING
); /* xxx */
1054 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1057 "in6_update_ifa: addmulti failed for "
1058 "%s on %s (errno=%d)\n",
1059 ip6_sprintf(&mltaddr
.sin6_addr
),
1060 if_name(ifp
), error
);
1065 * join node information group address
1067 #define hostnamelen strlen(hostname)
1068 if (in6_nigroup(ifp
, hostname
, hostnamelen
, &mltaddr
.sin6_addr
)
1070 IN6_LOOKUP_MULTI(mltaddr
.sin6_addr
, ifp
, in6m
);
1071 if (in6m
== NULL
&& ia
!= NULL
) {
1072 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1074 log(LOG_WARNING
, "in6_update_ifa: "
1075 "addmulti failed for "
1076 "%s on %s (errno=%d)\n",
1077 ip6_sprintf(&mltaddr
.sin6_addr
),
1078 if_name(ifp
), error
);
1085 * join node-local all-nodes address, on loopback.
1086 * XXX: since "node-local" is obsoleted by interface-local,
1087 * we have to join the group on every interface with
1088 * some interface-boundary restriction.
1090 if (ifp
->if_flags
& IFF_LOOPBACK
) {
1091 struct in6_ifaddr
*ia_loop
;
1093 struct in6_addr loop6
= kin6addr_loopback
;
1094 ia_loop
= in6ifa_ifpwithaddr(ifp
, &loop6
);
1096 mltaddr
.sin6_addr
= kin6addr_nodelocal_allnodes
;
1098 IN6_LOOKUP_MULTI(mltaddr
.sin6_addr
, ifp
, in6m
);
1099 if (in6m
== NULL
&& ia_loop
!= NULL
) {
1100 rtrequest_global(RTM_ADD
,
1101 (struct sockaddr
*)&mltaddr
,
1102 (struct sockaddr
*)&ia_loop
->ia_addr
,
1103 (struct sockaddr
*)&mltmask
,
1105 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1107 log(LOG_WARNING
, "in6_update_ifa: "
1108 "addmulti failed for %s on %s "
1110 ip6_sprintf(&mltaddr
.sin6_addr
),
1111 if_name(ifp
), error
);
1117 ia
->ia6_flags
= ifra
->ifra_flags
;
1118 ia
->ia6_flags
&= ~IN6_IFF_DUPLICATED
; /*safety*/
1119 ia
->ia6_flags
&= ~IN6_IFF_NODAD
; /* Mobile IPv6 */
1121 ia
->ia6_lifetime
= ifra
->ifra_lifetime
;
1123 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
1124 ia
->ia6_lifetime
.ia6t_expire
=
1125 time_second
+ ia
->ia6_lifetime
.ia6t_vltime
;
1127 ia
->ia6_lifetime
.ia6t_expire
= 0;
1128 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
1129 ia
->ia6_lifetime
.ia6t_preferred
=
1130 time_second
+ ia
->ia6_lifetime
.ia6t_pltime
;
1132 ia
->ia6_lifetime
.ia6t_preferred
= 0;
1135 * Perform DAD, if needed.
1136 * XXX It may be of use, if we can administratively
1139 if (in6if_do_dad(ifp
) && !(ifra
->ifra_flags
& IN6_IFF_NODAD
)) {
1140 ia
->ia6_flags
|= IN6_IFF_TENTATIVE
;
1141 nd6_dad_start((struct ifaddr
*)ia
, NULL
);
1148 * XXX: if a change of an existing address failed, keep the entry
1152 in6_unlink_ifa(ia
, ifp
);
1157 in6_purgeaddr(struct ifaddr
*ifa
)
1159 struct ifnet
*ifp
= ifa
->ifa_ifp
;
1160 struct in6_ifaddr
*ia
= (struct in6_ifaddr
*) ifa
;
1162 /* stop DAD processing */
1166 * delete route to the destination of the address being purged.
1167 * The interface must be p2p or loopback in this case.
1169 if ((ia
->ia_flags
& IFA_ROUTE
) && ia
->ia_dstaddr
.sin6_len
!= 0) {
1172 if ((e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
1174 log(LOG_ERR
, "in6_purgeaddr: failed to remove "
1175 "a route to the p2p destination: %s on %s, "
1177 ip6_sprintf(&ia
->ia_addr
.sin6_addr
), if_name(ifp
),
1179 /* proceed anyway... */
1182 ia
->ia_flags
&= ~IFA_ROUTE
;
1185 /* Remove ownaddr's loopback rtentry, if it exists. */
1186 in6_ifremloop(&(ia
->ia_ifa
));
1188 if (ifp
->if_flags
& IFF_MULTICAST
) {
1190 * delete solicited multicast addr for deleting host id
1192 struct in6_multi
*in6m
;
1193 struct in6_addr llsol
;
1194 bzero(&llsol
, sizeof(struct in6_addr
));
1195 llsol
.s6_addr16
[0] = htons(0xff02);
1196 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1197 llsol
.s6_addr32
[1] = 0;
1198 llsol
.s6_addr32
[2] = htonl(1);
1199 llsol
.s6_addr32
[3] =
1200 ia
->ia_addr
.sin6_addr
.s6_addr32
[3];
1201 llsol
.s6_addr8
[12] = 0xff;
1203 IN6_LOOKUP_MULTI(llsol
, ifp
, in6m
);
1208 in6_unlink_ifa(ia
, ifp
);
1212 in6_unlink_ifa(struct in6_ifaddr
*ia
, struct ifnet
*ifp
)
1215 struct in6_ifaddr
*oia
;
1219 TAILQ_REMOVE(&ifp
->if_addrlist
, &ia
->ia_ifa
, ifa_list
);
1222 if (oia
== (ia
= in6_ifaddr
))
1223 in6_ifaddr
= ia
->ia_next
;
1225 while (ia
->ia_next
&& (ia
->ia_next
!= oia
))
1228 ia
->ia_next
= oia
->ia_next
;
1231 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1235 if (oia
->ia6_ifpr
) { /* check for safety */
1236 plen
= in6_mask2len(&oia
->ia_prefixmask
.sin6_addr
, NULL
);
1237 iilen
= (sizeof(oia
->ia_prefixmask
.sin6_addr
) << 3) - plen
;
1238 in6_prefix_remove_ifid(iilen
, oia
);
1242 * When an autoconfigured address is being removed, release the
1243 * reference to the base prefix. Also, since the release might
1244 * affect the status of other (detached) addresses, call
1245 * pfxlist_onlink_check().
1247 if (oia
->ia6_flags
& IN6_IFF_AUTOCONF
) {
1248 if (oia
->ia6_ndpr
== NULL
) {
1249 log(LOG_NOTICE
, "in6_unlink_ifa: autoconf'ed address "
1250 "%p has no prefix\n", oia
);
1252 oia
->ia6_ndpr
->ndpr_refcnt
--;
1253 oia
->ia6_flags
&= ~IN6_IFF_AUTOCONF
;
1254 oia
->ia6_ndpr
= NULL
;
1257 pfxlist_onlink_check();
1261 * release another refcnt for the link from in6_ifaddr.
1262 * Note that we should decrement the refcnt at least once for all *BSD.
1264 IFAFREE(&oia
->ia_ifa
);
1270 in6_purgeif(struct ifnet
*ifp
)
1272 struct ifaddr
*ifa
, *nifa
;
1274 for (ifa
= TAILQ_FIRST(&ifp
->if_addrlist
); ifa
!= NULL
; ifa
= nifa
)
1276 nifa
= TAILQ_NEXT(ifa
, ifa_list
);
1277 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1287 * SIOCGLIFADDR: get first address. (?)
1288 * SIOCGLIFADDR with IFLR_PREFIX:
1289 * get first address that matches the specified prefix.
1290 * SIOCALIFADDR: add the specified address.
1291 * SIOCALIFADDR with IFLR_PREFIX:
1292 * add the specified prefix, filling hostid part from
1293 * the first link-local address. prefixlen must be <= 64.
1294 * SIOCDLIFADDR: delete the specified address.
1295 * SIOCDLIFADDR with IFLR_PREFIX:
1296 * delete the first address that matches the specified prefix.
1298 * EINVAL on invalid parameters
1299 * EADDRNOTAVAIL on prefix match failed/specified address not found
1300 * other values may be returned from in6_ioctl()
1302 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1303 * this is to accomodate address naming scheme other than RFC2374,
1305 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1306 * address encoding scheme. (see figure on page 8)
1309 in6_lifaddr_ioctl(struct socket
*so
, u_long cmd
, caddr_t data
,
1310 struct ifnet
*ifp
, struct thread
*td
)
1312 struct if_laddrreq
*iflr
= (struct if_laddrreq
*)data
;
1314 struct sockaddr
*sa
;
1317 if (!data
|| !ifp
) {
1318 panic("invalid argument to in6_lifaddr_ioctl");
1324 /* address must be specified on GET with IFLR_PREFIX */
1325 if (!(iflr
->flags
& IFLR_PREFIX
))
1330 /* address must be specified on ADD and DELETE */
1331 sa
= (struct sockaddr
*)&iflr
->addr
;
1332 if (sa
->sa_family
!= AF_INET6
)
1334 if (sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1336 /* XXX need improvement */
1337 sa
= (struct sockaddr
*)&iflr
->dstaddr
;
1338 if (sa
->sa_family
&& sa
->sa_family
!= AF_INET6
)
1340 if (sa
->sa_len
&& sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1343 default: /* shouldn't happen */
1345 panic("invalid cmd to in6_lifaddr_ioctl");
1351 if (sizeof(struct in6_addr
) * 8 < iflr
->prefixlen
)
1357 struct in6_aliasreq ifra
;
1358 struct in6_addr
*hostid
= NULL
;
1361 if (iflr
->flags
& IFLR_PREFIX
) {
1362 struct sockaddr_in6
*sin6
;
1365 * hostid is to fill in the hostid part of the
1366 * address. hostid points to the first link-local
1367 * address attached to the interface.
1369 ifa
= (struct ifaddr
*)in6ifa_ifpforlinklocal(ifp
, 0);
1371 return EADDRNOTAVAIL
;
1372 hostid
= IFA_IN6(ifa
);
1374 /* prefixlen must be <= 64. */
1375 if (64 < iflr
->prefixlen
)
1377 prefixlen
= iflr
->prefixlen
;
1379 /* hostid part must be zero. */
1380 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1381 if (sin6
->sin6_addr
.s6_addr32
[2] != 0
1382 || sin6
->sin6_addr
.s6_addr32
[3] != 0) {
1386 prefixlen
= iflr
->prefixlen
;
1388 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1389 bzero(&ifra
, sizeof(ifra
));
1390 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1391 sizeof(ifra
.ifra_name
));
1393 bcopy(&iflr
->addr
, &ifra
.ifra_addr
,
1394 ((struct sockaddr
*)&iflr
->addr
)->sa_len
);
1396 /* fill in hostid part */
1397 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[2] =
1398 hostid
->s6_addr32
[2];
1399 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[3] =
1400 hostid
->s6_addr32
[3];
1403 if (((struct sockaddr
*)&iflr
->dstaddr
)->sa_family
) { /*XXX*/
1404 bcopy(&iflr
->dstaddr
, &ifra
.ifra_dstaddr
,
1405 ((struct sockaddr
*)&iflr
->dstaddr
)->sa_len
);
1407 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[2] =
1408 hostid
->s6_addr32
[2];
1409 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[3] =
1410 hostid
->s6_addr32
[3];
1414 ifra
.ifra_prefixmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1415 in6_len2mask(&ifra
.ifra_prefixmask
.sin6_addr
, prefixlen
);
1417 ifra
.ifra_flags
= iflr
->flags
& ~IFLR_PREFIX
;
1418 return in6_control(so
, SIOCAIFADDR_IN6
, (caddr_t
)&ifra
, ifp
, td
);
1423 struct in6_ifaddr
*ia
;
1424 struct in6_addr mask
, candidate
, match
;
1425 struct sockaddr_in6
*sin6
;
1428 bzero(&mask
, sizeof(mask
));
1429 if (iflr
->flags
& IFLR_PREFIX
) {
1430 /* lookup a prefix rather than address. */
1431 in6_len2mask(&mask
, iflr
->prefixlen
);
1433 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1434 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1435 match
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1436 match
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1437 match
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1438 match
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1440 /* if you set extra bits, that's wrong */
1441 if (bcmp(&match
, &sin6
->sin6_addr
, sizeof(match
)))
1446 if (cmd
== SIOCGLIFADDR
) {
1447 /* on getting an address, take the 1st match */
1450 /* on deleting an address, do exact match */
1451 in6_len2mask(&mask
, 128);
1452 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1453 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1459 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
1461 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1466 bcopy(IFA_IN6(ifa
), &candidate
, sizeof(candidate
));
1468 * XXX: this is adhoc, but is necessary to allow
1469 * a user to specify fe80::/64 (not /10) for a
1470 * link-local address.
1472 if (IN6_IS_ADDR_LINKLOCAL(&candidate
))
1473 candidate
.s6_addr16
[1] = 0;
1474 candidate
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1475 candidate
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1476 candidate
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1477 candidate
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1478 if (IN6_ARE_ADDR_EQUAL(&candidate
, &match
))
1482 return EADDRNOTAVAIL
;
1485 if (cmd
== SIOCGLIFADDR
) {
1486 struct sockaddr_in6
*s6
;
1488 /* fill in the if_laddrreq structure */
1489 bcopy(&ia
->ia_addr
, &iflr
->addr
, ia
->ia_addr
.sin6_len
);
1490 s6
= (struct sockaddr_in6
*)&iflr
->addr
;
1491 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1492 s6
->sin6_addr
.s6_addr16
[1] = 0;
1494 in6_addr2scopeid(ifp
, &s6
->sin6_addr
);
1496 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
1497 bcopy(&ia
->ia_dstaddr
, &iflr
->dstaddr
,
1498 ia
->ia_dstaddr
.sin6_len
);
1499 s6
= (struct sockaddr_in6
*)&iflr
->dstaddr
;
1500 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1501 s6
->sin6_addr
.s6_addr16
[1] = 0;
1503 in6_addr2scopeid(ifp
,
1507 bzero(&iflr
->dstaddr
, sizeof(iflr
->dstaddr
));
1510 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
1513 iflr
->flags
= ia
->ia6_flags
; /* XXX */
1517 struct in6_aliasreq ifra
;
1519 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1520 bzero(&ifra
, sizeof(ifra
));
1521 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1522 sizeof(ifra
.ifra_name
));
1524 bcopy(&ia
->ia_addr
, &ifra
.ifra_addr
,
1525 ia
->ia_addr
.sin6_len
);
1526 if (ifp
->if_flags
& IFF_POINTOPOINT
)
1527 bcopy(&ia
->ia_dstaddr
, &ifra
.ifra_dstaddr
,
1528 ia
->ia_dstaddr
.sin6_len
);
1530 bzero(&ifra
.ifra_dstaddr
,
1531 sizeof(ifra
.ifra_dstaddr
));
1532 bcopy(&ia
->ia_prefixmask
, &ifra
.ifra_dstaddr
,
1533 ia
->ia_prefixmask
.sin6_len
);
1535 ifra
.ifra_flags
= ia
->ia6_flags
;
1536 return in6_control(so
, SIOCDIFADDR_IN6
, (caddr_t
)&ifra
,
1542 return EOPNOTSUPP
; /* just for safety */
1546 * Initialize an interface's intetnet6 address
1547 * and routing table entry.
1550 in6_ifinit(struct ifnet
*ifp
, struct in6_ifaddr
*ia
, struct sockaddr_in6
*sin6
,
1553 int error
= 0, plen
, ifacount
= 0;
1556 lwkt_serialize_enter(ifp
->if_serializer
);
1559 * Give the interface a chance to initialize
1560 * if this is its first address,
1561 * and to validate the address if necessary.
1563 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
1565 if (ifa
->ifa_addr
== NULL
)
1566 continue; /* just for safety */
1567 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1572 ia
->ia_addr
= *sin6
;
1574 if (ifacount
<= 1 && ifp
->if_ioctl
&&
1575 (error
= ifp
->if_ioctl(ifp
, SIOCSIFADDR
, (caddr_t
)ia
,
1576 (struct ucred
*)NULL
))) {
1577 lwkt_serialize_exit(ifp
->if_serializer
);
1580 lwkt_serialize_exit(ifp
->if_serializer
);
1582 ia
->ia_ifa
.ifa_metric
= ifp
->if_metric
;
1584 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1588 * If the destination address is specified for a point-to-point
1589 * interface, install a route to the destination as an interface
1592 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
); /* XXX */
1593 if (plen
== 128 && ia
->ia_dstaddr
.sin6_family
== AF_INET6
) {
1594 if ((error
= rtinit(&(ia
->ia_ifa
), (int)RTM_ADD
,
1595 RTF_UP
| RTF_HOST
)) != 0)
1597 ia
->ia_flags
|= IFA_ROUTE
;
1601 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1603 ia
->ia_ifa
.ifa_flags
|= RTF_CLONING
;
1606 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1608 /* set the rtrequest function to create llinfo */
1609 ia
->ia_ifa
.ifa_rtrequest
= nd6_rtrequest
;
1610 in6_ifaddloop(&(ia
->ia_ifa
));
1616 struct in6_multi_mship
*
1617 in6_joingroup(ifp
, addr
, errorp
)
1619 struct in6_addr
*addr
;
1622 struct in6_multi_mship
*imm
;
1624 imm
= kmalloc(sizeof(*imm
), M_IPMADDR
, M_NOWAIT
);
1629 imm
->i6mm_maddr
= in6_addmulti(addr
, ifp
, errorp
);
1630 if (!imm
->i6mm_maddr
) {
1631 /* *errorp is alrady set */
1632 kfree(imm
, M_IPMADDR
);
1640 struct in6_multi_mship
*imm
;
1643 if (imm
->i6mm_maddr
)
1644 in6_delmulti(imm
->i6mm_maddr
);
1645 kfree(imm
, M_IPMADDR
);
1650 * Add an address to the list of IP6 multicast addresses for a
1654 in6_addmulti(struct in6_addr
*maddr6
, struct ifnet
*ifp
, int *errorp
)
1656 struct in6_multi
*in6m
;
1657 struct sockaddr_in6 sin6
;
1658 struct ifmultiaddr
*ifma
;
1665 * Call generic routine to add membership or increment
1666 * refcount. It wants addresses in the form of a sockaddr,
1667 * so we build one here (being careful to zero the unused bytes).
1669 bzero(&sin6
, sizeof sin6
);
1670 sin6
.sin6_family
= AF_INET6
;
1671 sin6
.sin6_len
= sizeof sin6
;
1672 sin6
.sin6_addr
= *maddr6
;
1673 *errorp
= if_addmulti(ifp
, (struct sockaddr
*)&sin6
, &ifma
);
1680 * If ifma->ifma_protospec is null, then if_addmulti() created
1681 * a new record. Otherwise, we are done.
1683 if (ifma
->ifma_protospec
!= 0) {
1685 return ifma
->ifma_protospec
;
1688 /* XXX - if_addmulti uses M_WAITOK. Can this really be called
1689 at interrupt time? If so, need to fix if_addmulti. XXX */
1690 in6m
= (struct in6_multi
*)kmalloc(sizeof(*in6m
), M_IPMADDR
, M_NOWAIT
);
1696 bzero(in6m
, sizeof *in6m
);
1697 in6m
->in6m_addr
= *maddr6
;
1698 in6m
->in6m_ifp
= ifp
;
1699 in6m
->in6m_ifma
= ifma
;
1700 ifma
->ifma_protospec
= in6m
;
1701 LIST_INSERT_HEAD(&in6_multihead
, in6m
, in6m_entry
);
1704 * Let MLD6 know that we have joined a new IP6 multicast
1707 mld6_start_listening(in6m
);
1713 * Delete a multicast address record.
1716 in6_delmulti(struct in6_multi
*in6m
)
1718 struct ifmultiaddr
*ifma
= in6m
->in6m_ifma
;
1722 if (ifma
->ifma_refcount
== 1) {
1724 * No remaining claims to this record; let MLD6 know
1725 * that we are leaving the multicast group.
1727 mld6_stop_listening(in6m
);
1728 ifma
->ifma_protospec
= 0;
1729 LIST_REMOVE(in6m
, in6m_entry
);
1730 kfree(in6m
, M_IPMADDR
);
1732 /* XXX - should be separate API for when we have an ifma? */
1733 if_delmulti(ifma
->ifma_ifp
, ifma
->ifma_addr
);
1738 * Find an IPv6 interface link-local address specific to an interface.
1741 in6ifa_ifpforlinklocal(struct ifnet
*ifp
, int ignoreflags
)
1745 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
1747 if (ifa
->ifa_addr
== NULL
)
1748 continue; /* just for safety */
1749 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1751 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa
))) {
1752 if ((((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1759 return ((struct in6_ifaddr
*)ifa
);
1764 * find the internet address corresponding to a given interface and address.
1767 in6ifa_ifpwithaddr(struct ifnet
*ifp
, struct in6_addr
*addr
)
1771 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
1773 if (ifa
->ifa_addr
== NULL
)
1774 continue; /* just for safety */
1775 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1777 if (IN6_ARE_ADDR_EQUAL(addr
, IFA_IN6(ifa
)))
1781 return ((struct in6_ifaddr
*)ifa
);
1785 * Convert IP6 address to printable (loggable) representation.
1787 static char digits
[] = "0123456789abcdef";
1788 static int ip6round
= 0;
1790 ip6_sprintf(const struct in6_addr
*addr
)
1792 static char ip6buf
[8][48];
1795 const u_short
*a
= (const u_short
*)addr
;
1799 ip6round
= (ip6round
+ 1) & 7;
1800 cp
= ip6buf
[ip6round
];
1802 for (i
= 0; i
< 8; i
++) {
1813 if (dcolon
== 0 && *(a
+ 1) == 0) {
1825 d
= (const u_char
*)a
;
1826 *cp
++ = digits
[*d
>> 4];
1827 *cp
++ = digits
[*d
++ & 0xf];
1828 *cp
++ = digits
[*d
>> 4];
1829 *cp
++ = digits
[*d
& 0xf];
1834 return (ip6buf
[ip6round
]);
1838 in6_localaddr(struct in6_addr
*in6
)
1840 struct in6_ifaddr
*ia
;
1842 if (IN6_IS_ADDR_LOOPBACK(in6
) || IN6_IS_ADDR_LINKLOCAL(in6
))
1845 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
)
1846 if (IN6_ARE_MASKED_ADDR_EQUAL(in6
, &ia
->ia_addr
.sin6_addr
,
1847 &ia
->ia_prefixmask
.sin6_addr
))
1854 in6_is_addr_deprecated(struct sockaddr_in6
*sa6
)
1856 struct in6_ifaddr
*ia
;
1858 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
1859 if (IN6_ARE_ADDR_EQUAL(&ia
->ia_addr
.sin6_addr
,
1861 (ia
->ia6_flags
& IN6_IFF_DEPRECATED
))
1862 return (1); /* true */
1864 /* XXX: do we still have to go thru the rest of the list? */
1867 return (0); /* false */
1871 * return length of part which dst and src are equal
1875 in6_matchlen(struct in6_addr
*src
, struct in6_addr
*dst
)
1878 u_char
*s
= (u_char
*)src
, *d
= (u_char
*)dst
;
1879 u_char
*lim
= s
+ 16, r
;
1882 if ((r
= (*d
++ ^ *s
++)) != 0) {
1893 /* XXX: to be scope conscious */
1895 in6_are_prefix_equal(struct in6_addr
*p1
, struct in6_addr
*p2
, int len
)
1897 int bytelen
, bitlen
;
1900 if (0 > len
|| len
> 128) {
1901 log(LOG_ERR
, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1909 if (bcmp(&p1
->s6_addr
, &p2
->s6_addr
, bytelen
))
1911 if (p1
->s6_addr
[bytelen
] >> (8 - bitlen
) !=
1912 p2
->s6_addr
[bytelen
] >> (8 - bitlen
))
1919 in6_prefixlen2mask(struct in6_addr
*maskp
, int len
)
1921 u_char maskarray
[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1922 int bytelen
, bitlen
, i
;
1925 if (0 > len
|| len
> 128) {
1926 log(LOG_ERR
, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1931 bzero(maskp
, sizeof(*maskp
));
1934 for (i
= 0; i
< bytelen
; i
++)
1935 maskp
->s6_addr
[i
] = 0xff;
1937 maskp
->s6_addr
[bytelen
] = maskarray
[bitlen
- 1];
1941 * return the best address out of the same scope
1944 in6_ifawithscope(struct ifnet
*oifp
, struct in6_addr
*dst
)
1946 int dst_scope
= in6_addrscope(dst
), src_scope
, best_scope
= 0;
1950 struct in6_ifaddr
*ifa_best
= NULL
;
1954 kprintf("in6_ifawithscope: output interface is not specified\n");
1960 * We search for all addresses on all interfaces from the beginning.
1961 * Comparing an interface with the outgoing interface will be done
1962 * only at the final stage of tiebreaking.
1964 for (ifp
= TAILQ_FIRST(&ifnet
); ifp
; ifp
= TAILQ_NEXT(ifp
, if_list
))
1967 * We can never take an address that breaks the scope zone
1968 * of the destination.
1970 if (in6_addr2scopeid(ifp
, dst
) != in6_addr2scopeid(oifp
, dst
))
1973 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
1975 int tlen
= -1, dscopecmp
, bscopecmp
, matchcmp
;
1977 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1980 src_scope
= in6_addrscope(IFA_IN6(ifa
));
1983 * Don't use an address before completing DAD
1984 * nor a duplicated address.
1986 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1990 /* XXX: is there any case to allow anycasts? */
1991 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1995 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2000 * If this is the first address we find,
2003 if (ifa_best
== NULL
)
2007 * ifa_best is never NULL beyond this line except
2008 * within the block labeled "replace".
2012 * If ifa_best has a smaller scope than dst and
2013 * the current address has a larger one than
2014 * (or equal to) dst, always replace ifa_best.
2015 * Also, if the current address has a smaller scope
2016 * than dst, ignore it unless ifa_best also has a
2018 * Consequently, after the two if-clause below,
2019 * the followings must be satisfied:
2020 * (scope(src) < scope(dst) &&
2021 * scope(best) < scope(dst))
2023 * (scope(best) >= scope(dst) &&
2024 * scope(src) >= scope(dst))
2026 if (IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) < 0 &&
2027 IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) >= 0)
2028 goto replace
; /* (A) */
2029 if (IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) < 0 &&
2030 IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) >= 0)
2034 * A deprecated address SHOULD NOT be used in new
2035 * communications if an alternate (non-deprecated)
2036 * address is available and has sufficient scope.
2037 * RFC 2462, Section 5.5.4.
2039 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2040 IN6_IFF_DEPRECATED
) {
2042 * Ignore any deprecated addresses if
2043 * specified by configuration.
2045 if (!ip6_use_deprecated
)
2049 * If we have already found a non-deprecated
2050 * candidate, just ignore deprecated addresses.
2052 if (!(ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
))
2057 * A non-deprecated address is always preferred
2058 * to a deprecated one regardless of scopes and
2059 * address matching (Note invariants ensured by the
2060 * conditions (A) and (B) above.)
2062 if ((ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
) &&
2063 !(((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2064 IN6_IFF_DEPRECATED
))
2068 * When we use temporary addresses described in
2069 * RFC 3041, we prefer temporary addresses to
2070 * public autoconf addresses. Again, note the
2071 * invariants from (A) and (B). Also note that we
2072 * don't have any preference between static addresses
2073 * and autoconf addresses (despite of whether or not
2074 * the latter is temporary or public.)
2076 if (ip6_use_tempaddr
) {
2077 struct in6_ifaddr
*ifat
;
2079 ifat
= (struct in6_ifaddr
*)ifa
;
2080 if ((ifa_best
->ia6_flags
&
2081 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2082 == IN6_IFF_AUTOCONF
&&
2084 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2085 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
)) {
2088 if ((ifa_best
->ia6_flags
&
2089 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2090 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
) &&
2092 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2093 == IN6_IFF_AUTOCONF
) {
2099 * At this point, we have two cases:
2100 * 1. we are looking at a non-deprecated address,
2101 * and ifa_best is also non-deprecated.
2102 * 2. we are looking at a deprecated address,
2103 * and ifa_best is also deprecated.
2104 * Also, we do not have to consider a case where
2105 * the scope of if_best is larger(smaller) than dst and
2106 * the scope of the current address is smaller(larger)
2107 * than dst. Such a case has already been covered.
2108 * Tiebreaking is done according to the following
2110 * - the scope comparison between the address and
2112 * - the scope comparison between the address and
2113 * ifa_best (bscopecmp)
2114 * - if the address match dst longer than ifa_best
2116 * - if the address is on the outgoing I/F (outI/F)
2118 * Roughly speaking, the selection policy is
2119 * - the most important item is scope. The same scope
2120 * is best. Then search for a larger scope.
2121 * Smaller scopes are the last resort.
2122 * - A deprecated address is chosen only when we have
2123 * no address that has an enough scope, but is
2124 * prefered to any addresses of smaller scopes
2125 * (this must be already done above.)
2126 * - addresses on the outgoing I/F are preferred to
2127 * ones on other interfaces if none of above
2128 * tiebreaks. In the table below, the column "bI"
2129 * means if the best_ifa is on the outgoing
2130 * interface, and the column "sI" means if the ifa
2131 * is on the outgoing interface.
2132 * - If there is no other reasons to choose one,
2133 * longest address match against dst is considered.
2135 * The precise decision table is as follows:
2136 * dscopecmp bscopecmp match bI oI | replace?
2137 * N/A equal N/A Y N | No (1)
2138 * N/A equal N/A N Y | Yes (2)
2139 * N/A equal larger N/A | Yes (3)
2140 * N/A equal !larger N/A | No (4)
2141 * larger larger N/A N/A | No (5)
2142 * larger smaller N/A N/A | Yes (6)
2143 * smaller larger N/A N/A | Yes (7)
2144 * smaller smaller N/A N/A | No (8)
2145 * equal smaller N/A N/A | Yes (9)
2146 * equal larger (already done at A above)
2148 dscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
);
2149 bscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, best_scope
);
2151 if (bscopecmp
== 0) {
2152 struct ifnet
*bifp
= ifa_best
->ia_ifp
;
2154 if (bifp
== oifp
&& ifp
!= oifp
) /* (1) */
2156 if (bifp
!= oifp
&& ifp
== oifp
) /* (2) */
2160 * Both bifp and ifp are on the outgoing
2161 * interface, or both two are on a different
2162 * interface from the outgoing I/F.
2163 * now we need address matching against dst
2166 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2167 matchcmp
= tlen
- blen
;
2168 if (matchcmp
> 0) /* (3) */
2172 if (dscopecmp
> 0) {
2173 if (bscopecmp
> 0) /* (5) */
2175 goto replace
; /* (6) */
2177 if (dscopecmp
< 0) {
2178 if (bscopecmp
> 0) /* (7) */
2183 /* now dscopecmp must be 0 */
2185 goto replace
; /* (9) */
2188 ifa_best
= (struct in6_ifaddr
*)ifa
;
2189 blen
= tlen
>= 0 ? tlen
:
2190 in6_matchlen(IFA_IN6(ifa
), dst
);
2191 best_scope
= in6_addrscope(&ifa_best
->ia_addr
.sin6_addr
);
2195 /* count statistics for future improvements */
2196 if (ifa_best
== NULL
)
2197 ip6stat
.ip6s_sources_none
++;
2199 if (oifp
== ifa_best
->ia_ifp
)
2200 ip6stat
.ip6s_sources_sameif
[best_scope
]++;
2202 ip6stat
.ip6s_sources_otherif
[best_scope
]++;
2204 if (best_scope
== dst_scope
)
2205 ip6stat
.ip6s_sources_samescope
[best_scope
]++;
2207 ip6stat
.ip6s_sources_otherscope
[best_scope
]++;
2209 if (ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
)
2210 ip6stat
.ip6s_sources_deprecated
[best_scope
]++;
2217 * return the best address out of the same scope. if no address was
2218 * found, return the first valid address from designated IF.
2221 in6_ifawithifp(struct ifnet
*ifp
, struct in6_addr
*dst
)
2223 int dst_scope
= in6_addrscope(dst
), blen
= -1, tlen
;
2225 struct in6_ifaddr
*besta
= 0;
2226 struct in6_ifaddr
*dep
[2]; /* last-resort: deprecated */
2228 dep
[0] = dep
[1] = NULL
;
2231 * We first look for addresses in the same scope.
2232 * If there is one, return it.
2233 * If two or more, return one which matches the dst longest.
2234 * If none, return one of global addresses assigned other ifs.
2236 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
2238 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2240 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2241 continue; /* XXX: is there any case to allow anycast? */
2242 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2243 continue; /* don't use this interface */
2244 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2246 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2247 if (ip6_use_deprecated
)
2248 dep
[0] = (struct in6_ifaddr
*)ifa
;
2252 if (dst_scope
== in6_addrscope(IFA_IN6(ifa
))) {
2254 * call in6_matchlen() as few as possible
2258 blen
= in6_matchlen(&besta
->ia_addr
.sin6_addr
, dst
);
2259 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2262 besta
= (struct in6_ifaddr
*)ifa
;
2265 besta
= (struct in6_ifaddr
*)ifa
;
2271 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
2273 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2275 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2276 continue; /* XXX: is there any case to allow anycast? */
2277 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2278 continue; /* don't use this interface */
2279 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2281 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2282 if (ip6_use_deprecated
)
2283 dep
[1] = (struct in6_ifaddr
*)ifa
;
2287 return (struct in6_ifaddr
*)ifa
;
2290 /* use the last-resort values, that are, deprecated addresses */
2300 * perform DAD when interface becomes IFF_UP.
2303 in6_if_up(struct ifnet
*ifp
)
2306 struct in6_ifaddr
*ia
;
2307 int dad_delay
; /* delay ticks before DAD output */
2310 * special cases, like 6to4, are handled in in6_ifattach
2312 in6_ifattach(ifp
, NULL
);
2315 TAILQ_FOREACH(ifa
, &ifp
->if_addrlist
, ifa_list
)
2317 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2319 ia
= (struct in6_ifaddr
*)ifa
;
2320 if (ia
->ia6_flags
& IN6_IFF_TENTATIVE
)
2321 nd6_dad_start(ifa
, &dad_delay
);
2326 in6if_do_dad(struct ifnet
*ifp
)
2328 if (ifp
->if_flags
& IFF_LOOPBACK
)
2331 switch (ifp
->if_type
) {
2337 * These interfaces do not have the IFF_LOOPBACK flag,
2338 * but loop packets back. We do not have to do DAD on such
2339 * interfaces. We should even omit it, because loop-backed
2340 * NS would confuse the DAD procedure.
2345 * Our DAD routine requires the interface up and running.
2346 * However, some interfaces can be up before the RUNNING
2347 * status. Additionaly, users may try to assign addresses
2348 * before the interface becomes up (or running).
2349 * We simply skip DAD in such a case as a work around.
2350 * XXX: we should rather mark "tentative" on such addresses,
2351 * and do DAD after the interface becomes ready.
2353 if ((ifp
->if_flags
& (IFF_UP
|IFF_RUNNING
)) !=
2354 (IFF_UP
|IFF_RUNNING
))
2362 * Calculate max IPv6 MTU through all the interfaces and store it
2368 unsigned long maxmtu
= 0;
2371 for (ifp
= TAILQ_FIRST(&ifnet
); ifp
; ifp
= TAILQ_NEXT(ifp
, if_list
))
2373 if (!(ifp
->if_flags
& IFF_LOOPBACK
) &&
2374 ND_IFINFO(ifp
)->linkmtu
> maxmtu
)
2375 maxmtu
= ND_IFINFO(ifp
)->linkmtu
;
2377 if (maxmtu
) /* update only when maxmtu is positive */
2378 in6_maxmtu
= maxmtu
;
2382 in6_domifattach(struct ifnet
*ifp
)
2384 struct in6_ifextra
*ext
;
2386 ext
= (struct in6_ifextra
*)kmalloc(sizeof(*ext
), M_IFADDR
, M_WAITOK
);
2387 bzero(ext
, sizeof(*ext
));
2389 ext
->in6_ifstat
= (struct in6_ifstat
*)kmalloc(sizeof(struct in6_ifstat
),
2390 M_IFADDR
, M_WAITOK
);
2391 bzero(ext
->in6_ifstat
, sizeof(*ext
->in6_ifstat
));
2394 (struct icmp6_ifstat
*)kmalloc(sizeof(struct icmp6_ifstat
),
2395 M_IFADDR
, M_WAITOK
);
2396 bzero(ext
->icmp6_ifstat
, sizeof(*ext
->icmp6_ifstat
));
2398 ext
->nd_ifinfo
= nd6_ifattach(ifp
);
2399 ext
->scope6_id
= scope6_ifattach(ifp
);
2404 in6_domifdetach(struct ifnet
*ifp
, void *aux
)
2406 struct in6_ifextra
*ext
= (struct in6_ifextra
*)aux
;
2407 scope6_ifdetach(ext
->scope6_id
);
2408 nd6_ifdetach(ext
->nd_ifinfo
);
2409 kfree(ext
->in6_ifstat
, M_IFADDR
);
2410 kfree(ext
->icmp6_ifstat
, M_IFADDR
);
2411 kfree(ext
, M_IFADDR
);
2415 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2416 * v4 mapped addr or v4 compat addr
2419 in6_sin6_2_sin(struct sockaddr_in
*sin
, struct sockaddr_in6
*sin6
)
2421 bzero(sin
, sizeof(*sin
));
2422 sin
->sin_len
= sizeof(struct sockaddr_in
);
2423 sin
->sin_family
= AF_INET
;
2424 sin
->sin_port
= sin6
->sin6_port
;
2425 sin
->sin_addr
.s_addr
= sin6
->sin6_addr
.s6_addr32
[3];
2428 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2430 in6_sin_2_v4mapsin6(struct sockaddr_in
*sin
, struct sockaddr_in6
*sin6
)
2432 bzero(sin6
, sizeof(*sin6
));
2433 sin6
->sin6_len
= sizeof(struct sockaddr_in6
);
2434 sin6
->sin6_family
= AF_INET6
;
2435 sin6
->sin6_port
= sin
->sin_port
;
2436 sin6
->sin6_addr
.s6_addr32
[0] = 0;
2437 sin6
->sin6_addr
.s6_addr32
[1] = 0;
2438 sin6
->sin6_addr
.s6_addr32
[2] = IPV6_ADDR_INT32_SMP
;
2439 sin6
->sin6_addr
.s6_addr32
[3] = sin
->sin_addr
.s_addr
;
2442 /* Convert sockaddr_in6 into sockaddr_in. */
2444 in6_sin6_2_sin_in_sock(struct sockaddr
*nam
)
2446 struct sockaddr_in
*sin_p
;
2447 struct sockaddr_in6 sin6
;
2450 * Save original sockaddr_in6 addr and convert it
2453 sin6
= *(struct sockaddr_in6
*)nam
;
2454 sin_p
= (struct sockaddr_in
*)nam
;
2455 in6_sin6_2_sin(sin_p
, &sin6
);
2458 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2460 in6_sin_2_v4mapsin6_in_sock(struct sockaddr
**nam
)
2462 struct sockaddr_in
*sin_p
;
2463 struct sockaddr_in6
*sin6_p
;
2465 MALLOC(sin6_p
, struct sockaddr_in6
*, sizeof *sin6_p
, M_SONAME
,
2467 sin_p
= (struct sockaddr_in
*)*nam
;
2468 in6_sin_2_v4mapsin6(sin_p
, sin6_p
);
2469 FREE(*nam
, M_SONAME
);
2470 *nam
= (struct sockaddr
*)sin6_p
;