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 1.29 2008/04/20 13:44:26 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
)
305 struct sockaddr_in6
*sin6
;
306 struct ifaddr_container
*ifac
;
308 if (idx
< 0 || if_index
< idx
)
310 ifp
= ifindex2ifnet
[idx
];
312 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
)
314 struct ifaddr
*ifa
= ifac
->ifa
;
316 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
318 sin6
= (struct sockaddr_in6
*)ifa
->ifa_addr
;
319 if (IN6_IS_ADDR_SITELOCAL(&sin6
->sin6_addr
))
320 return sin6
->sin6_scope_id
& 0xffff;
327 in6_mask2len(struct in6_addr
*mask
, u_char
*lim0
)
330 u_char
*lim
= lim0
, *p
;
333 lim0
- (u_char
*)mask
> sizeof(*mask
)) /* ignore the scope_id part */
334 lim
= (u_char
*)mask
+ sizeof(*mask
);
335 for (p
= (u_char
*)mask
; p
< lim
; x
++, p
++) {
341 for (y
= 0; y
< 8; y
++) {
342 if ((*p
& (0x80 >> y
)) == 0)
348 * when the limit pointer is given, do a stricter check on the
352 if (y
!= 0 && (*p
& (0x00ff >> y
)) != 0)
354 for (p
= p
+ 1; p
< lim
; p
++)
363 in6_len2mask(struct in6_addr
*mask
, int len
)
367 bzero(mask
, sizeof(*mask
));
368 for (i
= 0; i
< len
/ 8; i
++)
369 mask
->s6_addr8
[i
] = 0xff;
371 mask
->s6_addr8
[i
] = (0xff00 >> (len
% 8)) & 0xff;
374 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
375 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
378 in6_control(struct socket
*so
, u_long cmd
, caddr_t data
,
379 struct ifnet
*ifp
, struct thread
*td
)
381 struct in6_ifreq
*ifr
= (struct in6_ifreq
*)data
;
382 struct in6_ifaddr
*ia
= NULL
;
383 struct in6_aliasreq
*ifra
= (struct in6_aliasreq
*)data
;
392 case SIOCGETSGCNT_IN6
:
393 case SIOCGETMIFCNT_IN6
:
394 return (mrt6_ioctl(cmd
, data
));
401 case SIOCSNDFLUSH_IN6
:
402 case SIOCSPFXFLUSH_IN6
:
403 case SIOCSRTRFLUSH_IN6
:
404 case SIOCSDEFIFACE_IN6
:
405 case SIOCSIFINFO_FLAGS
:
409 case OSIOCGIFINFO_IN6
:
410 case SIOCGIFINFO_IN6
:
413 case SIOCGNBRINFO_IN6
:
414 case SIOCGDEFIFACE_IN6
:
415 return (nd6_ioctl(cmd
, data
, ifp
));
419 case SIOCSIFPREFIX_IN6
:
420 case SIOCDIFPREFIX_IN6
:
421 case SIOCAIFPREFIX_IN6
:
422 case SIOCCIFPREFIX_IN6
:
423 case SIOCSGIFPREFIX_IN6
:
424 case SIOCGIFPREFIX_IN6
:
426 "prefix ioctls are now invalidated. "
427 "please use ifconfig.\n");
435 return (scope6_set(ifp
,
436 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
439 return (scope6_get(ifp
,
440 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
443 return (scope6_get_default((struct scope6_id
*)
444 ifr
->ifr_ifru
.ifru_scope_id
));
455 return in6_lifaddr_ioctl(so
, cmd
, data
, ifp
, td
);
459 * Find address for this interface, if it exists.
461 if (ifra
->ifra_addr
.sin6_family
== AF_INET6
) { /* XXX */
462 struct sockaddr_in6
*sa6
=
463 (struct sockaddr_in6
*)&ifra
->ifra_addr
;
465 if (IN6_IS_ADDR_LINKLOCAL(&sa6
->sin6_addr
)) {
466 if (sa6
->sin6_addr
.s6_addr16
[1] == 0) {
467 /* link ID is not embedded by the user */
468 sa6
->sin6_addr
.s6_addr16
[1] =
469 htons(ifp
->if_index
);
470 } else if (sa6
->sin6_addr
.s6_addr16
[1] !=
471 htons(ifp
->if_index
)) {
472 return (EINVAL
); /* link ID contradicts */
474 if (sa6
->sin6_scope_id
) {
475 if (sa6
->sin6_scope_id
!=
476 (u_int32_t
)ifp
->if_index
)
478 sa6
->sin6_scope_id
= 0; /* XXX: good way? */
481 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
485 case SIOCSIFADDR_IN6
:
486 case SIOCSIFDSTADDR_IN6
:
487 case SIOCSIFNETMASK_IN6
:
489 * Since IPv6 allows a node to assign multiple addresses
490 * on a single interface, SIOCSIFxxx ioctls are not suitable
491 * and should be unused.
493 /* we decided to obsolete this command (20000704) */
496 case SIOCDIFADDR_IN6
:
498 * for IPv4, we look for existing in_ifaddr here to allow
499 * "ifconfig if0 delete" to remove first IPv4 address on the
500 * interface. For IPv6, as the spec allow multiple interface
501 * address from the day one, we consider "remove the first one"
502 * semantics to be not preferable.
505 return (EADDRNOTAVAIL
);
507 case SIOCAIFADDR_IN6
:
509 * We always require users to specify a valid IPv6 address for
510 * the corresponding operation.
512 if (ifra
->ifra_addr
.sin6_family
!= AF_INET6
||
513 ifra
->ifra_addr
.sin6_len
!= sizeof(struct sockaddr_in6
))
514 return (EAFNOSUPPORT
);
520 case SIOCGIFADDR_IN6
:
521 /* This interface is basically deprecated. use SIOCGIFCONF. */
523 case SIOCGIFAFLAG_IN6
:
524 case SIOCGIFNETMASK_IN6
:
525 case SIOCGIFDSTADDR_IN6
:
526 case SIOCGIFALIFETIME_IN6
:
527 /* must think again about its semantics */
529 return (EADDRNOTAVAIL
);
531 case SIOCSIFALIFETIME_IN6
:
533 struct in6_addrlifetime
*lt
;
538 return (EADDRNOTAVAIL
);
539 /* sanity for overflow - beware unsigned */
540 lt
= &ifr
->ifr_ifru
.ifru_lifetime
;
541 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
542 && lt
->ia6t_vltime
+ time_second
< time_second
) {
545 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
546 && lt
->ia6t_pltime
+ time_second
< time_second
) {
555 case SIOCGIFADDR_IN6
:
556 ifr
->ifr_addr
= ia
->ia_addr
;
559 case SIOCGIFDSTADDR_IN6
:
560 if (!(ifp
->if_flags
& IFF_POINTOPOINT
))
563 * XXX: should we check if ifa_dstaddr is NULL and return
566 ifr
->ifr_dstaddr
= ia
->ia_dstaddr
;
569 case SIOCGIFNETMASK_IN6
:
570 ifr
->ifr_addr
= ia
->ia_prefixmask
;
573 case SIOCGIFAFLAG_IN6
:
574 ifr
->ifr_ifru
.ifru_flags6
= ia
->ia6_flags
;
577 case SIOCGIFSTAT_IN6
:
580 bzero(&ifr
->ifr_ifru
.ifru_stat
,
581 sizeof(ifr
->ifr_ifru
.ifru_stat
));
582 ifr
->ifr_ifru
.ifru_stat
=
583 *((struct in6_ifextra
*)ifp
->if_afdata
[AF_INET6
])->in6_ifstat
;
586 case SIOCGIFSTAT_ICMP6
:
587 bzero(&ifr
->ifr_ifru
.ifru_stat
,
588 sizeof(ifr
->ifr_ifru
.ifru_icmp6stat
));
589 ifr
->ifr_ifru
.ifru_icmp6stat
=
590 *((struct in6_ifextra
*)ifp
->if_afdata
[AF_INET6
])->icmp6_ifstat
;
593 case SIOCGIFALIFETIME_IN6
:
594 ifr
->ifr_ifru
.ifru_lifetime
= ia
->ia6_lifetime
;
597 case SIOCSIFALIFETIME_IN6
:
598 ia
->ia6_lifetime
= ifr
->ifr_ifru
.ifru_lifetime
;
600 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
601 ia
->ia6_lifetime
.ia6t_expire
=
602 time_second
+ ia
->ia6_lifetime
.ia6t_vltime
;
604 ia
->ia6_lifetime
.ia6t_expire
= 0;
605 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
606 ia
->ia6_lifetime
.ia6t_preferred
=
607 time_second
+ ia
->ia6_lifetime
.ia6t_pltime
;
609 ia
->ia6_lifetime
.ia6t_preferred
= 0;
612 case SIOCAIFADDR_IN6
:
615 struct nd_prefix pr0
, *pr
;
618 * first, make or update the interface address structure,
619 * and link it to the list.
621 if ((error
= in6_update_ifa(ifp
, ifra
, ia
)) != 0)
625 * then, make the prefix on-link on the interface.
626 * XXX: we'd rather create the prefix before the address, but
627 * we need at least one address to install the corresponding
628 * interface route, so we configure the address first.
632 * convert mask to prefix length (prefixmask has already
633 * been validated in in6_update_ifa().
635 bzero(&pr0
, sizeof(pr0
));
637 pr0
.ndpr_plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
639 if (pr0
.ndpr_plen
== 128)
640 break; /* we don't need to install a host route. */
641 pr0
.ndpr_prefix
= ifra
->ifra_addr
;
642 pr0
.ndpr_mask
= ifra
->ifra_prefixmask
.sin6_addr
;
643 /* apply the mask for safety. */
644 for (i
= 0; i
< 4; i
++) {
645 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
646 ifra
->ifra_prefixmask
.sin6_addr
.s6_addr32
[i
];
649 * XXX: since we don't have an API to set prefix (not address)
650 * lifetimes, we just use the same lifetimes as addresses.
651 * The (temporarily) installed lifetimes can be overridden by
652 * later advertised RAs (when accept_rtadv is non 0), which is
653 * an intended behavior.
655 pr0
.ndpr_raf_onlink
= 1; /* should be configurable? */
657 ((ifra
->ifra_flags
& IN6_IFF_AUTOCONF
) != 0);
658 pr0
.ndpr_vltime
= ifra
->ifra_lifetime
.ia6t_vltime
;
659 pr0
.ndpr_pltime
= ifra
->ifra_lifetime
.ia6t_pltime
;
661 /* add the prefix if there's one. */
662 if ((pr
= nd6_prefix_lookup(&pr0
)) == NULL
) {
664 * nd6_prelist_add will install the corresponding
667 if ((error
= nd6_prelist_add(&pr0
, NULL
, &pr
)) != 0)
670 log(LOG_ERR
, "nd6_prelist_add succeeded but "
672 return (EINVAL
); /* XXX panic here? */
675 if ((ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
))
677 /* XXX: this should not happen! */
678 log(LOG_ERR
, "in6_control: addition succeeded, but"
681 if ((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
682 ia
->ia6_ndpr
== NULL
) { /* new autoconfed addr */
687 * If this is the first autoconf address from
688 * the prefix, create a temporary address
689 * as well (when specified).
691 if (ip6_use_tempaddr
&&
692 pr
->ndpr_refcnt
== 1) {
694 if ((e
= in6_tmpifadd(ia
, 1)) != 0) {
695 log(LOG_NOTICE
, "in6_control: "
696 "failed to create a "
697 "temporary address, "
705 * this might affect the status of autoconfigured
706 * addresses, that is, this address might make
707 * other addresses detached.
709 pfxlist_onlink_check();
711 if (error
== 0 && ia
)
712 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
);
716 case SIOCDIFADDR_IN6
:
719 struct nd_prefix pr0
, *pr
;
722 * If the address being deleted is the only one that owns
723 * the corresponding prefix, expire the prefix as well.
724 * XXX: theoretically, we don't have to warry about such
725 * relationship, since we separate the address management
726 * and the prefix management. We do this, however, to provide
727 * as much backward compatibility as possible in terms of
728 * the ioctl operation.
730 bzero(&pr0
, sizeof(pr0
));
732 pr0
.ndpr_plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
734 if (pr0
.ndpr_plen
== 128)
736 pr0
.ndpr_prefix
= ia
->ia_addr
;
737 pr0
.ndpr_mask
= ia
->ia_prefixmask
.sin6_addr
;
738 for (i
= 0; i
< 4; i
++) {
739 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
740 ia
->ia_prefixmask
.sin6_addr
.s6_addr32
[i
];
743 * The logic of the following condition is a bit complicated.
744 * We expire the prefix when
745 * 1. the address obeys autoconfiguration and it is the
746 * only owner of the associated prefix, or
747 * 2. the address does not obey autoconf and there is no
748 * other owner of the prefix.
750 if ((pr
= nd6_prefix_lookup(&pr0
)) != NULL
&&
751 (((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
752 pr
->ndpr_refcnt
== 1) ||
753 (!(ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
754 pr
->ndpr_refcnt
== 0))) {
755 pr
->ndpr_expire
= 1; /* XXX: just for expiration */
759 in6_purgeaddr(&ia
->ia_ifa
);
760 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
);
765 if (ifp
== NULL
|| ifp
->if_ioctl
== 0)
767 lwkt_serialize_enter(ifp
->if_serializer
);
768 error
= ifp
->if_ioctl(ifp
, cmd
, data
, td
->td_proc
->p_ucred
);
769 lwkt_serialize_exit(ifp
->if_serializer
);
777 * Update parameters of an IPv6 interface address.
778 * If necessary, a new entry is created and linked into address chains.
779 * This function is separated from in6_control().
780 * XXX: should this be performed under splnet()?
783 in6_update_ifa(struct ifnet
*ifp
, struct in6_aliasreq
*ifra
,
784 struct in6_ifaddr
*ia
)
786 int error
= 0, hostIsNew
= 0, plen
= -1;
787 struct in6_ifaddr
*oia
;
788 struct sockaddr_in6 dst6
;
789 struct in6_addrlifetime
*lt
;
791 /* Validate parameters */
792 if (ifp
== NULL
|| ifra
== NULL
) /* this maybe redundant */
796 * The destination address for a p2p link must have a family
797 * of AF_UNSPEC or AF_INET6.
799 if ((ifp
->if_flags
& IFF_POINTOPOINT
) &&
800 ifra
->ifra_dstaddr
.sin6_family
!= AF_INET6
&&
801 ifra
->ifra_dstaddr
.sin6_family
!= AF_UNSPEC
)
802 return (EAFNOSUPPORT
);
804 * validate ifra_prefixmask. don't check sin6_family, netmask
805 * does not carry fields other than sin6_len.
807 if (ifra
->ifra_prefixmask
.sin6_len
> sizeof(struct sockaddr_in6
))
810 * Because the IPv6 address architecture is classless, we require
811 * users to specify a (non 0) prefix length (mask) for a new address.
812 * We also require the prefix (when specified) mask is valid, and thus
813 * reject a non-consecutive mask.
815 if (ia
== NULL
&& ifra
->ifra_prefixmask
.sin6_len
== 0)
817 if (ifra
->ifra_prefixmask
.sin6_len
!= 0) {
818 plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
819 (u_char
*)&ifra
->ifra_prefixmask
+
820 ifra
->ifra_prefixmask
.sin6_len
);
826 * In this case, ia must not be NULL. We just use its prefix
829 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
);
832 * If the destination address on a p2p interface is specified,
833 * and the address is a scoped one, validate/set the scope
836 dst6
= ifra
->ifra_dstaddr
;
837 if ((ifp
->if_flags
& (IFF_POINTOPOINT
|IFF_LOOPBACK
)) &&
838 (dst6
.sin6_family
== AF_INET6
)) {
841 if ((error
= in6_recoverscope(&dst6
,
842 &ifra
->ifra_dstaddr
.sin6_addr
,
845 scopeid
= in6_addr2scopeid(ifp
, &dst6
.sin6_addr
);
846 if (dst6
.sin6_scope_id
== 0) /* user omit to specify the ID. */
847 dst6
.sin6_scope_id
= scopeid
;
848 else if (dst6
.sin6_scope_id
!= scopeid
)
849 return (EINVAL
); /* scope ID mismatch. */
850 if ((error
= in6_embedscope(&dst6
.sin6_addr
, &dst6
, NULL
, NULL
))
853 dst6
.sin6_scope_id
= 0; /* XXX */
856 * The destination address can be specified only for a p2p or a
857 * loopback interface. If specified, the corresponding prefix length
860 if (ifra
->ifra_dstaddr
.sin6_family
== AF_INET6
) {
861 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) == 0) {
862 /* XXX: noisy message */
863 log(LOG_INFO
, "in6_update_ifa: a destination can be "
864 "specified for a p2p or a loopback IF only\n");
869 * The following message seems noisy, but we dare to
870 * add it for diagnosis.
872 log(LOG_INFO
, "in6_update_ifa: prefixlen must be 128 "
873 "when dstaddr is specified\n");
877 /* lifetime consistency check */
878 lt
= &ifra
->ifra_lifetime
;
879 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
880 && lt
->ia6t_vltime
+ time_second
< time_second
) {
883 if (lt
->ia6t_vltime
== 0) {
885 * the following log might be noisy, but this is a typical
886 * configuration mistake or a tool's bug.
889 "in6_update_ifa: valid lifetime is 0 for %s\n",
890 ip6_sprintf(&ifra
->ifra_addr
.sin6_addr
));
892 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
893 && lt
->ia6t_pltime
+ time_second
< time_second
) {
898 * If this is a new address, allocate a new ifaddr and link it
904 * When in6_update_ifa() is called in a process of a received
905 * RA, it is called under splnet(). So, we should call malloc
908 ia
= ifa_create(sizeof(*ia
), M_NOWAIT
);
911 /* Initialize the address and masks */
912 ia
->ia_ifa
.ifa_addr
= (struct sockaddr
*)&ia
->ia_addr
;
913 ia
->ia_addr
.sin6_family
= AF_INET6
;
914 ia
->ia_addr
.sin6_len
= sizeof(ia
->ia_addr
);
915 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) != 0) {
917 * XXX: some functions expect that ifa_dstaddr is not
918 * NULL for p2p interfaces.
920 ia
->ia_ifa
.ifa_dstaddr
921 = (struct sockaddr
*)&ia
->ia_dstaddr
;
923 ia
->ia_ifa
.ifa_dstaddr
= NULL
;
925 ia
->ia_ifa
.ifa_netmask
926 = (struct sockaddr
*)&ia
->ia_prefixmask
;
929 if ((oia
= in6_ifaddr
) != NULL
) {
930 for ( ; oia
->ia_next
; oia
= oia
->ia_next
)
936 ifa_iflink(&ia
->ia_ifa
, ifp
, 1);
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 ifa_ifunlink(&ia
->ia_ifa
, ifp
);
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 ifa_destroy(&oia
->ia_ifa
);
1270 in6_purgeif(struct ifnet
*ifp
)
1272 struct ifaddr_container
*ifac
, *next
;
1274 TAILQ_FOREACH_MUTABLE(ifac
, &ifp
->if_addrheads
[mycpuid
],
1276 if (ifac
->ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1278 in6_purgeaddr(ifac
->ifa
);
1286 * SIOCGLIFADDR: get first address. (?)
1287 * SIOCGLIFADDR with IFLR_PREFIX:
1288 * get first address that matches the specified prefix.
1289 * SIOCALIFADDR: add the specified address.
1290 * SIOCALIFADDR with IFLR_PREFIX:
1291 * add the specified prefix, filling hostid part from
1292 * the first link-local address. prefixlen must be <= 64.
1293 * SIOCDLIFADDR: delete the specified address.
1294 * SIOCDLIFADDR with IFLR_PREFIX:
1295 * delete the first address that matches the specified prefix.
1297 * EINVAL on invalid parameters
1298 * EADDRNOTAVAIL on prefix match failed/specified address not found
1299 * other values may be returned from in6_ioctl()
1301 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1302 * this is to accomodate address naming scheme other than RFC2374,
1304 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1305 * address encoding scheme. (see figure on page 8)
1308 in6_lifaddr_ioctl(struct socket
*so
, u_long cmd
, caddr_t data
,
1309 struct ifnet
*ifp
, struct thread
*td
)
1311 struct if_laddrreq
*iflr
= (struct if_laddrreq
*)data
;
1312 struct sockaddr
*sa
;
1315 if (!data
|| !ifp
) {
1316 panic("invalid argument to in6_lifaddr_ioctl");
1322 /* address must be specified on GET with IFLR_PREFIX */
1323 if (!(iflr
->flags
& IFLR_PREFIX
))
1328 /* address must be specified on ADD and DELETE */
1329 sa
= (struct sockaddr
*)&iflr
->addr
;
1330 if (sa
->sa_family
!= AF_INET6
)
1332 if (sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1334 /* XXX need improvement */
1335 sa
= (struct sockaddr
*)&iflr
->dstaddr
;
1336 if (sa
->sa_family
&& sa
->sa_family
!= AF_INET6
)
1338 if (sa
->sa_len
&& sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1341 default: /* shouldn't happen */
1343 panic("invalid cmd to in6_lifaddr_ioctl");
1349 if (sizeof(struct in6_addr
) * 8 < iflr
->prefixlen
)
1355 struct in6_aliasreq ifra
;
1356 struct in6_addr
*hostid
= NULL
;
1359 if (iflr
->flags
& IFLR_PREFIX
) {
1361 struct sockaddr_in6
*sin6
;
1364 * hostid is to fill in the hostid part of the
1365 * address. hostid points to the first link-local
1366 * address attached to the interface.
1368 ifa
= (struct ifaddr
*)in6ifa_ifpforlinklocal(ifp
, 0);
1370 return EADDRNOTAVAIL
;
1371 hostid
= IFA_IN6(ifa
);
1373 /* prefixlen must be <= 64. */
1374 if (64 < iflr
->prefixlen
)
1376 prefixlen
= iflr
->prefixlen
;
1378 /* hostid part must be zero. */
1379 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1380 if (sin6
->sin6_addr
.s6_addr32
[2] != 0
1381 || sin6
->sin6_addr
.s6_addr32
[3] != 0) {
1385 prefixlen
= iflr
->prefixlen
;
1387 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1388 bzero(&ifra
, sizeof(ifra
));
1389 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1390 sizeof(ifra
.ifra_name
));
1392 bcopy(&iflr
->addr
, &ifra
.ifra_addr
,
1393 ((struct sockaddr
*)&iflr
->addr
)->sa_len
);
1395 /* fill in hostid part */
1396 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[2] =
1397 hostid
->s6_addr32
[2];
1398 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[3] =
1399 hostid
->s6_addr32
[3];
1402 if (((struct sockaddr
*)&iflr
->dstaddr
)->sa_family
) { /*XXX*/
1403 bcopy(&iflr
->dstaddr
, &ifra
.ifra_dstaddr
,
1404 ((struct sockaddr
*)&iflr
->dstaddr
)->sa_len
);
1406 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[2] =
1407 hostid
->s6_addr32
[2];
1408 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[3] =
1409 hostid
->s6_addr32
[3];
1413 ifra
.ifra_prefixmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1414 in6_len2mask(&ifra
.ifra_prefixmask
.sin6_addr
, prefixlen
);
1416 ifra
.ifra_flags
= iflr
->flags
& ~IFLR_PREFIX
;
1417 return in6_control(so
, SIOCAIFADDR_IN6
, (caddr_t
)&ifra
, ifp
, td
);
1422 struct ifaddr_container
*ifac
;
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(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1460 struct ifaddr
*ifa
= ifac
->ifa
;
1462 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1467 bcopy(IFA_IN6(ifa
), &candidate
, sizeof(candidate
));
1469 * XXX: this is adhoc, but is necessary to allow
1470 * a user to specify fe80::/64 (not /10) for a
1471 * link-local address.
1473 if (IN6_IS_ADDR_LINKLOCAL(&candidate
))
1474 candidate
.s6_addr16
[1] = 0;
1475 candidate
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1476 candidate
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1477 candidate
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1478 candidate
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1479 if (IN6_ARE_ADDR_EQUAL(&candidate
, &match
))
1483 return EADDRNOTAVAIL
;
1484 ia
= ifa2ia6(ifac
->ifa
);
1486 if (cmd
== SIOCGLIFADDR
) {
1487 struct sockaddr_in6
*s6
;
1489 /* fill in the if_laddrreq structure */
1490 bcopy(&ia
->ia_addr
, &iflr
->addr
, ia
->ia_addr
.sin6_len
);
1491 s6
= (struct sockaddr_in6
*)&iflr
->addr
;
1492 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1493 s6
->sin6_addr
.s6_addr16
[1] = 0;
1495 in6_addr2scopeid(ifp
, &s6
->sin6_addr
);
1497 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
1498 bcopy(&ia
->ia_dstaddr
, &iflr
->dstaddr
,
1499 ia
->ia_dstaddr
.sin6_len
);
1500 s6
= (struct sockaddr_in6
*)&iflr
->dstaddr
;
1501 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1502 s6
->sin6_addr
.s6_addr16
[1] = 0;
1504 in6_addr2scopeid(ifp
,
1508 bzero(&iflr
->dstaddr
, sizeof(iflr
->dstaddr
));
1511 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
1514 iflr
->flags
= ia
->ia6_flags
; /* XXX */
1518 struct in6_aliasreq ifra
;
1520 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1521 bzero(&ifra
, sizeof(ifra
));
1522 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1523 sizeof(ifra
.ifra_name
));
1525 bcopy(&ia
->ia_addr
, &ifra
.ifra_addr
,
1526 ia
->ia_addr
.sin6_len
);
1527 if (ifp
->if_flags
& IFF_POINTOPOINT
)
1528 bcopy(&ia
->ia_dstaddr
, &ifra
.ifra_dstaddr
,
1529 ia
->ia_dstaddr
.sin6_len
);
1531 bzero(&ifra
.ifra_dstaddr
,
1532 sizeof(ifra
.ifra_dstaddr
));
1533 bcopy(&ia
->ia_prefixmask
, &ifra
.ifra_dstaddr
,
1534 ia
->ia_prefixmask
.sin6_len
);
1536 ifra
.ifra_flags
= ia
->ia6_flags
;
1537 return in6_control(so
, SIOCDIFADDR_IN6
, (caddr_t
)&ifra
,
1543 return EOPNOTSUPP
; /* just for safety */
1547 * Initialize an interface's intetnet6 address
1548 * and routing table entry.
1551 in6_ifinit(struct ifnet
*ifp
, struct in6_ifaddr
*ia
, struct sockaddr_in6
*sin6
,
1554 int error
= 0, plen
, ifacount
= 0;
1555 struct ifaddr_container
*ifac
;
1558 * Give the interface a chance to initialize
1559 * if this is its first address,
1560 * and to validate the address if necessary.
1562 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1563 if (ifac
->ifa
->ifa_addr
== NULL
)
1564 continue; /* just for safety */
1565 if (ifac
->ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1570 lwkt_serialize_enter(ifp
->if_serializer
);
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(struct ifnet
*ifp
, struct in6_addr
*addr
, int *errorp
)
1619 struct in6_multi_mship
*imm
;
1621 imm
= kmalloc(sizeof(*imm
), M_IPMADDR
, M_NOWAIT
);
1626 imm
->i6mm_maddr
= in6_addmulti(addr
, ifp
, errorp
);
1627 if (!imm
->i6mm_maddr
) {
1628 /* *errorp is alrady set */
1629 kfree(imm
, M_IPMADDR
);
1636 in6_leavegroup(struct in6_multi_mship
*imm
)
1639 if (imm
->i6mm_maddr
)
1640 in6_delmulti(imm
->i6mm_maddr
);
1641 kfree(imm
, M_IPMADDR
);
1646 * Add an address to the list of IP6 multicast addresses for a
1650 in6_addmulti(struct in6_addr
*maddr6
, struct ifnet
*ifp
, int *errorp
)
1652 struct in6_multi
*in6m
;
1653 struct sockaddr_in6 sin6
;
1654 struct ifmultiaddr
*ifma
;
1661 * Call generic routine to add membership or increment
1662 * refcount. It wants addresses in the form of a sockaddr,
1663 * so we build one here (being careful to zero the unused bytes).
1665 bzero(&sin6
, sizeof sin6
);
1666 sin6
.sin6_family
= AF_INET6
;
1667 sin6
.sin6_len
= sizeof sin6
;
1668 sin6
.sin6_addr
= *maddr6
;
1669 *errorp
= if_addmulti(ifp
, (struct sockaddr
*)&sin6
, &ifma
);
1676 * If ifma->ifma_protospec is null, then if_addmulti() created
1677 * a new record. Otherwise, we are done.
1679 if (ifma
->ifma_protospec
!= 0) {
1681 return ifma
->ifma_protospec
;
1684 /* XXX - if_addmulti uses M_WAITOK. Can this really be called
1685 at interrupt time? If so, need to fix if_addmulti. XXX */
1686 in6m
= (struct in6_multi
*)kmalloc(sizeof(*in6m
), M_IPMADDR
, M_NOWAIT
);
1692 bzero(in6m
, sizeof *in6m
);
1693 in6m
->in6m_addr
= *maddr6
;
1694 in6m
->in6m_ifp
= ifp
;
1695 in6m
->in6m_ifma
= ifma
;
1696 ifma
->ifma_protospec
= in6m
;
1697 LIST_INSERT_HEAD(&in6_multihead
, in6m
, in6m_entry
);
1700 * Let MLD6 know that we have joined a new IP6 multicast
1703 mld6_start_listening(in6m
);
1709 * Delete a multicast address record.
1712 in6_delmulti(struct in6_multi
*in6m
)
1714 struct ifmultiaddr
*ifma
= in6m
->in6m_ifma
;
1718 if (ifma
->ifma_refcount
== 1) {
1720 * No remaining claims to this record; let MLD6 know
1721 * that we are leaving the multicast group.
1723 mld6_stop_listening(in6m
);
1724 ifma
->ifma_protospec
= 0;
1725 LIST_REMOVE(in6m
, in6m_entry
);
1726 kfree(in6m
, M_IPMADDR
);
1728 /* XXX - should be separate API for when we have an ifma? */
1729 if_delmulti(ifma
->ifma_ifp
, ifma
->ifma_addr
);
1734 * Find an IPv6 interface link-local address specific to an interface.
1737 in6ifa_ifpforlinklocal(struct ifnet
*ifp
, int ignoreflags
)
1739 struct ifaddr_container
*ifac
;
1741 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1742 struct ifaddr
*ifa
= ifac
->ifa
;
1744 if (ifa
->ifa_addr
== NULL
)
1745 continue; /* just for safety */
1746 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1748 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa
))) {
1749 if ((((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1756 return ((struct in6_ifaddr
*)(ifac
->ifa
));
1763 * find the internet address corresponding to a given interface and address.
1766 in6ifa_ifpwithaddr(struct ifnet
*ifp
, struct in6_addr
*addr
)
1768 struct ifaddr_container
*ifac
;
1770 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1771 struct ifaddr
*ifa
= ifac
->ifa
;
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
*)(ifac
->ifa
));
1787 * Convert IP6 address to printable (loggable) representation.
1789 static char digits
[] = "0123456789abcdef";
1790 static int ip6round
= 0;
1792 ip6_sprintf(const struct in6_addr
*addr
)
1794 static char ip6buf
[8][48];
1797 const u_short
*a
= (const u_short
*)addr
;
1801 ip6round
= (ip6round
+ 1) & 7;
1802 cp
= ip6buf
[ip6round
];
1804 for (i
= 0; i
< 8; i
++) {
1815 if (dcolon
== 0 && *(a
+ 1) == 0) {
1827 d
= (const u_char
*)a
;
1828 *cp
++ = digits
[*d
>> 4];
1829 *cp
++ = digits
[*d
++ & 0xf];
1830 *cp
++ = digits
[*d
>> 4];
1831 *cp
++ = digits
[*d
& 0xf];
1836 return (ip6buf
[ip6round
]);
1840 in6_localaddr(struct in6_addr
*in6
)
1842 struct in6_ifaddr
*ia
;
1844 if (IN6_IS_ADDR_LOOPBACK(in6
) || IN6_IS_ADDR_LINKLOCAL(in6
))
1847 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
)
1848 if (IN6_ARE_MASKED_ADDR_EQUAL(in6
, &ia
->ia_addr
.sin6_addr
,
1849 &ia
->ia_prefixmask
.sin6_addr
))
1856 in6_is_addr_deprecated(struct sockaddr_in6
*sa6
)
1858 struct in6_ifaddr
*ia
;
1860 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
1861 if (IN6_ARE_ADDR_EQUAL(&ia
->ia_addr
.sin6_addr
,
1863 (ia
->ia6_flags
& IN6_IFF_DEPRECATED
))
1864 return (1); /* true */
1866 /* XXX: do we still have to go thru the rest of the list? */
1869 return (0); /* false */
1873 * return length of part which dst and src are equal
1877 in6_matchlen(struct in6_addr
*src
, struct in6_addr
*dst
)
1880 u_char
*s
= (u_char
*)src
, *d
= (u_char
*)dst
;
1881 u_char
*lim
= s
+ 16, r
;
1884 if ((r
= (*d
++ ^ *s
++)) != 0) {
1895 /* XXX: to be scope conscious */
1897 in6_are_prefix_equal(struct in6_addr
*p1
, struct in6_addr
*p2
, int len
)
1899 int bytelen
, bitlen
;
1902 if (0 > len
|| len
> 128) {
1903 log(LOG_ERR
, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1911 if (bcmp(&p1
->s6_addr
, &p2
->s6_addr
, bytelen
))
1913 if (p1
->s6_addr
[bytelen
] >> (8 - bitlen
) !=
1914 p2
->s6_addr
[bytelen
] >> (8 - bitlen
))
1921 in6_prefixlen2mask(struct in6_addr
*maskp
, int len
)
1923 u_char maskarray
[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1924 int bytelen
, bitlen
, i
;
1927 if (0 > len
|| len
> 128) {
1928 log(LOG_ERR
, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1933 bzero(maskp
, sizeof(*maskp
));
1936 for (i
= 0; i
< bytelen
; i
++)
1937 maskp
->s6_addr
[i
] = 0xff;
1939 maskp
->s6_addr
[bytelen
] = maskarray
[bitlen
- 1];
1943 * return the best address out of the same scope
1946 in6_ifawithscope(struct ifnet
*oifp
, struct in6_addr
*dst
)
1948 int dst_scope
= in6_addrscope(dst
), src_scope
, best_scope
= 0;
1951 struct in6_ifaddr
*ifa_best
= NULL
;
1955 kprintf("in6_ifawithscope: output interface is not specified\n");
1961 * We search for all addresses on all interfaces from the beginning.
1962 * Comparing an interface with the outgoing interface will be done
1963 * only at the final stage of tiebreaking.
1965 for (ifp
= TAILQ_FIRST(&ifnet
); ifp
; ifp
= TAILQ_NEXT(ifp
, if_list
))
1967 struct ifaddr_container
*ifac
;
1970 * We can never take an address that breaks the scope zone
1971 * of the destination.
1973 if (in6_addr2scopeid(ifp
, dst
) != in6_addr2scopeid(oifp
, dst
))
1976 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1977 int tlen
= -1, dscopecmp
, bscopecmp
, matchcmp
;
1978 struct ifaddr
*ifa
= ifac
->ifa
;
1980 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1983 src_scope
= in6_addrscope(IFA_IN6(ifa
));
1986 * Don't use an address before completing DAD
1987 * nor a duplicated address.
1989 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1993 /* XXX: is there any case to allow anycasts? */
1994 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1998 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2003 * If this is the first address we find,
2006 if (ifa_best
== NULL
)
2010 * ifa_best is never NULL beyond this line except
2011 * within the block labeled "replace".
2015 * If ifa_best has a smaller scope than dst and
2016 * the current address has a larger one than
2017 * (or equal to) dst, always replace ifa_best.
2018 * Also, if the current address has a smaller scope
2019 * than dst, ignore it unless ifa_best also has a
2021 * Consequently, after the two if-clause below,
2022 * the followings must be satisfied:
2023 * (scope(src) < scope(dst) &&
2024 * scope(best) < scope(dst))
2026 * (scope(best) >= scope(dst) &&
2027 * scope(src) >= scope(dst))
2029 if (IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) < 0 &&
2030 IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) >= 0)
2031 goto replace
; /* (A) */
2032 if (IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) < 0 &&
2033 IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) >= 0)
2037 * A deprecated address SHOULD NOT be used in new
2038 * communications if an alternate (non-deprecated)
2039 * address is available and has sufficient scope.
2040 * RFC 2462, Section 5.5.4.
2042 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2043 IN6_IFF_DEPRECATED
) {
2045 * Ignore any deprecated addresses if
2046 * specified by configuration.
2048 if (!ip6_use_deprecated
)
2052 * If we have already found a non-deprecated
2053 * candidate, just ignore deprecated addresses.
2055 if (!(ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
))
2060 * A non-deprecated address is always preferred
2061 * to a deprecated one regardless of scopes and
2062 * address matching (Note invariants ensured by the
2063 * conditions (A) and (B) above.)
2065 if ((ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
) &&
2066 !(((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2067 IN6_IFF_DEPRECATED
))
2071 * When we use temporary addresses described in
2072 * RFC 3041, we prefer temporary addresses to
2073 * public autoconf addresses. Again, note the
2074 * invariants from (A) and (B). Also note that we
2075 * don't have any preference between static addresses
2076 * and autoconf addresses (despite of whether or not
2077 * the latter is temporary or public.)
2079 if (ip6_use_tempaddr
) {
2080 struct in6_ifaddr
*ifat
;
2082 ifat
= (struct in6_ifaddr
*)ifa
;
2083 if ((ifa_best
->ia6_flags
&
2084 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2085 == IN6_IFF_AUTOCONF
&&
2087 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2088 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
)) {
2091 if ((ifa_best
->ia6_flags
&
2092 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2093 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
) &&
2095 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2096 == IN6_IFF_AUTOCONF
) {
2102 * At this point, we have two cases:
2103 * 1. we are looking at a non-deprecated address,
2104 * and ifa_best is also non-deprecated.
2105 * 2. we are looking at a deprecated address,
2106 * and ifa_best is also deprecated.
2107 * Also, we do not have to consider a case where
2108 * the scope of if_best is larger(smaller) than dst and
2109 * the scope of the current address is smaller(larger)
2110 * than dst. Such a case has already been covered.
2111 * Tiebreaking is done according to the following
2113 * - the scope comparison between the address and
2115 * - the scope comparison between the address and
2116 * ifa_best (bscopecmp)
2117 * - if the address match dst longer than ifa_best
2119 * - if the address is on the outgoing I/F (outI/F)
2121 * Roughly speaking, the selection policy is
2122 * - the most important item is scope. The same scope
2123 * is best. Then search for a larger scope.
2124 * Smaller scopes are the last resort.
2125 * - A deprecated address is chosen only when we have
2126 * no address that has an enough scope, but is
2127 * prefered to any addresses of smaller scopes
2128 * (this must be already done above.)
2129 * - addresses on the outgoing I/F are preferred to
2130 * ones on other interfaces if none of above
2131 * tiebreaks. In the table below, the column "bI"
2132 * means if the best_ifa is on the outgoing
2133 * interface, and the column "sI" means if the ifa
2134 * is on the outgoing interface.
2135 * - If there is no other reasons to choose one,
2136 * longest address match against dst is considered.
2138 * The precise decision table is as follows:
2139 * dscopecmp bscopecmp match bI oI | replace?
2140 * N/A equal N/A Y N | No (1)
2141 * N/A equal N/A N Y | Yes (2)
2142 * N/A equal larger N/A | Yes (3)
2143 * N/A equal !larger N/A | No (4)
2144 * larger larger N/A N/A | No (5)
2145 * larger smaller N/A N/A | Yes (6)
2146 * smaller larger N/A N/A | Yes (7)
2147 * smaller smaller N/A N/A | No (8)
2148 * equal smaller N/A N/A | Yes (9)
2149 * equal larger (already done at A above)
2151 dscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
);
2152 bscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, best_scope
);
2154 if (bscopecmp
== 0) {
2155 struct ifnet
*bifp
= ifa_best
->ia_ifp
;
2157 if (bifp
== oifp
&& ifp
!= oifp
) /* (1) */
2159 if (bifp
!= oifp
&& ifp
== oifp
) /* (2) */
2163 * Both bifp and ifp are on the outgoing
2164 * interface, or both two are on a different
2165 * interface from the outgoing I/F.
2166 * now we need address matching against dst
2169 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2170 matchcmp
= tlen
- blen
;
2171 if (matchcmp
> 0) /* (3) */
2175 if (dscopecmp
> 0) {
2176 if (bscopecmp
> 0) /* (5) */
2178 goto replace
; /* (6) */
2180 if (dscopecmp
< 0) {
2181 if (bscopecmp
> 0) /* (7) */
2186 /* now dscopecmp must be 0 */
2188 goto replace
; /* (9) */
2191 ifa_best
= (struct in6_ifaddr
*)ifa
;
2192 blen
= tlen
>= 0 ? tlen
:
2193 in6_matchlen(IFA_IN6(ifa
), dst
);
2194 best_scope
= in6_addrscope(&ifa_best
->ia_addr
.sin6_addr
);
2198 /* count statistics for future improvements */
2199 if (ifa_best
== NULL
)
2200 ip6stat
.ip6s_sources_none
++;
2202 if (oifp
== ifa_best
->ia_ifp
)
2203 ip6stat
.ip6s_sources_sameif
[best_scope
]++;
2205 ip6stat
.ip6s_sources_otherif
[best_scope
]++;
2207 if (best_scope
== dst_scope
)
2208 ip6stat
.ip6s_sources_samescope
[best_scope
]++;
2210 ip6stat
.ip6s_sources_otherscope
[best_scope
]++;
2212 if (ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
)
2213 ip6stat
.ip6s_sources_deprecated
[best_scope
]++;
2220 * return the best address out of the same scope. if no address was
2221 * found, return the first valid address from designated IF.
2224 in6_ifawithifp(struct ifnet
*ifp
, struct in6_addr
*dst
)
2226 int dst_scope
= in6_addrscope(dst
), blen
= -1, tlen
;
2227 struct ifaddr_container
*ifac
;
2228 struct in6_ifaddr
*besta
= 0;
2229 struct in6_ifaddr
*dep
[2]; /* last-resort: deprecated */
2231 dep
[0] = dep
[1] = NULL
;
2234 * We first look for addresses in the same scope.
2235 * If there is one, return it.
2236 * If two or more, return one which matches the dst longest.
2237 * If none, return one of global addresses assigned other ifs.
2239 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2240 struct ifaddr
*ifa
= ifac
->ifa
;
2242 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2244 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2245 continue; /* XXX: is there any case to allow anycast? */
2246 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2247 continue; /* don't use this interface */
2248 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2250 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2251 if (ip6_use_deprecated
)
2252 dep
[0] = (struct in6_ifaddr
*)ifa
;
2256 if (dst_scope
== in6_addrscope(IFA_IN6(ifa
))) {
2258 * call in6_matchlen() as few as possible
2262 blen
= in6_matchlen(&besta
->ia_addr
.sin6_addr
, dst
);
2263 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2266 besta
= (struct in6_ifaddr
*)ifa
;
2269 besta
= (struct in6_ifaddr
*)ifa
;
2275 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2276 struct ifaddr
*ifa
= ifac
->ifa
;
2278 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2280 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2281 continue; /* XXX: is there any case to allow anycast? */
2282 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2283 continue; /* don't use this interface */
2284 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2286 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2287 if (ip6_use_deprecated
)
2288 dep
[1] = (struct in6_ifaddr
*)ifa
;
2292 return (struct in6_ifaddr
*)ifa
;
2295 /* use the last-resort values, that are, deprecated addresses */
2305 * perform DAD when interface becomes IFF_UP.
2308 in6_if_up(struct ifnet
*ifp
)
2310 struct ifaddr_container
*ifac
;
2311 struct in6_ifaddr
*ia
;
2312 int dad_delay
; /* delay ticks before DAD output */
2315 * special cases, like 6to4, are handled in in6_ifattach
2317 in6_ifattach(ifp
, NULL
);
2320 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2321 struct ifaddr
*ifa
= ifac
->ifa
;
2323 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2325 ia
= (struct in6_ifaddr
*)ifa
;
2326 if (ia
->ia6_flags
& IN6_IFF_TENTATIVE
)
2327 nd6_dad_start(ifa
, &dad_delay
);
2332 in6if_do_dad(struct ifnet
*ifp
)
2334 if (ifp
->if_flags
& IFF_LOOPBACK
)
2337 switch (ifp
->if_type
) {
2343 * These interfaces do not have the IFF_LOOPBACK flag,
2344 * but loop packets back. We do not have to do DAD on such
2345 * interfaces. We should even omit it, because loop-backed
2346 * NS would confuse the DAD procedure.
2351 * Our DAD routine requires the interface up and running.
2352 * However, some interfaces can be up before the RUNNING
2353 * status. Additionaly, users may try to assign addresses
2354 * before the interface becomes up (or running).
2355 * We simply skip DAD in such a case as a work around.
2356 * XXX: we should rather mark "tentative" on such addresses,
2357 * and do DAD after the interface becomes ready.
2359 if ((ifp
->if_flags
& (IFF_UP
|IFF_RUNNING
)) !=
2360 (IFF_UP
|IFF_RUNNING
))
2368 * Calculate max IPv6 MTU through all the interfaces and store it
2374 unsigned long maxmtu
= 0;
2377 for (ifp
= TAILQ_FIRST(&ifnet
); ifp
; ifp
= TAILQ_NEXT(ifp
, if_list
))
2379 if (!(ifp
->if_flags
& IFF_LOOPBACK
) &&
2380 ND_IFINFO(ifp
)->linkmtu
> maxmtu
)
2381 maxmtu
= ND_IFINFO(ifp
)->linkmtu
;
2383 if (maxmtu
) /* update only when maxmtu is positive */
2384 in6_maxmtu
= maxmtu
;
2388 in6_domifattach(struct ifnet
*ifp
)
2390 struct in6_ifextra
*ext
;
2392 ext
= (struct in6_ifextra
*)kmalloc(sizeof(*ext
), M_IFADDR
, M_WAITOK
);
2393 bzero(ext
, sizeof(*ext
));
2395 ext
->in6_ifstat
= (struct in6_ifstat
*)kmalloc(sizeof(struct in6_ifstat
),
2396 M_IFADDR
, M_WAITOK
);
2397 bzero(ext
->in6_ifstat
, sizeof(*ext
->in6_ifstat
));
2400 (struct icmp6_ifstat
*)kmalloc(sizeof(struct icmp6_ifstat
),
2401 M_IFADDR
, M_WAITOK
);
2402 bzero(ext
->icmp6_ifstat
, sizeof(*ext
->icmp6_ifstat
));
2404 ext
->nd_ifinfo
= nd6_ifattach(ifp
);
2405 ext
->scope6_id
= scope6_ifattach(ifp
);
2410 in6_domifdetach(struct ifnet
*ifp
, void *aux
)
2412 struct in6_ifextra
*ext
= (struct in6_ifextra
*)aux
;
2413 scope6_ifdetach(ext
->scope6_id
);
2414 nd6_ifdetach(ext
->nd_ifinfo
);
2415 kfree(ext
->in6_ifstat
, M_IFADDR
);
2416 kfree(ext
->icmp6_ifstat
, M_IFADDR
);
2417 kfree(ext
, M_IFADDR
);
2421 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2422 * v4 mapped addr or v4 compat addr
2425 in6_sin6_2_sin(struct sockaddr_in
*sin
, struct sockaddr_in6
*sin6
)
2427 bzero(sin
, sizeof(*sin
));
2428 sin
->sin_len
= sizeof(struct sockaddr_in
);
2429 sin
->sin_family
= AF_INET
;
2430 sin
->sin_port
= sin6
->sin6_port
;
2431 sin
->sin_addr
.s_addr
= sin6
->sin6_addr
.s6_addr32
[3];
2434 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2436 in6_sin_2_v4mapsin6(struct sockaddr_in
*sin
, struct sockaddr_in6
*sin6
)
2438 bzero(sin6
, sizeof(*sin6
));
2439 sin6
->sin6_len
= sizeof(struct sockaddr_in6
);
2440 sin6
->sin6_family
= AF_INET6
;
2441 sin6
->sin6_port
= sin
->sin_port
;
2442 sin6
->sin6_addr
.s6_addr32
[0] = 0;
2443 sin6
->sin6_addr
.s6_addr32
[1] = 0;
2444 sin6
->sin6_addr
.s6_addr32
[2] = IPV6_ADDR_INT32_SMP
;
2445 sin6
->sin6_addr
.s6_addr32
[3] = sin
->sin_addr
.s_addr
;
2448 /* Convert sockaddr_in6 into sockaddr_in. */
2450 in6_sin6_2_sin_in_sock(struct sockaddr
*nam
)
2452 struct sockaddr_in
*sin_p
;
2453 struct sockaddr_in6 sin6
;
2456 * Save original sockaddr_in6 addr and convert it
2459 sin6
= *(struct sockaddr_in6
*)nam
;
2460 sin_p
= (struct sockaddr_in
*)nam
;
2461 in6_sin6_2_sin(sin_p
, &sin6
);
2464 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2466 in6_sin_2_v4mapsin6_in_sock(struct sockaddr
**nam
)
2468 struct sockaddr_in
*sin_p
;
2469 struct sockaddr_in6
*sin6_p
;
2471 MALLOC(sin6_p
, struct sockaddr_in6
*, sizeof *sin6_p
, M_SONAME
,
2473 sin_p
= (struct sockaddr_in
*)*nam
;
2474 in6_sin_2_v4mapsin6(sin_p
, sin6_p
);
2475 FREE(*nam
, M_SONAME
);
2476 *nam
= (struct sockaddr
*)sin6_p
;