1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */
2 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (c) 1982, 1986, 1991, 1993
35 * The Regents of the University of California. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
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46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
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50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * @(#)in.c 8.2 (Berkeley) 11/15/93
65 #include "opt_inet6.h"
67 #include <sys/param.h>
68 #include <sys/errno.h>
69 #include <sys/malloc.h>
70 #include <sys/socket.h>
71 #include <sys/socketvar.h>
72 #include <sys/sockio.h>
73 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/syslog.h>
81 #include <sys/thread2.h>
82 #include <sys/msgport2.h>
85 #include <net/if_types.h>
86 #include <net/route.h>
87 #include <net/if_dl.h>
88 #include <net/netmsg2.h>
89 #include <net/netisr2.h>
91 #include <netinet/in.h>
92 #include <netinet/in_var.h>
93 #include <netinet/if_ether.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/ip.h>
96 #include <netinet/in_pcb.h>
98 #include <netinet/ip6.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet6/mld6_var.h>
102 #include <netinet6/ip6_mroute.h>
103 #include <netinet6/in6_ifattach.h>
104 #include <netinet6/scope6_var.h>
105 #include <netinet6/in6_pcb.h>
106 #include <netinet6/in6_var.h>
108 #include <net/net_osdep.h>
111 * Definitions of some costant IP6 addresses.
113 const struct in6_addr kin6addr_any
= IN6ADDR_ANY_INIT
;
114 const struct in6_addr kin6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
115 const struct in6_addr kin6addr_nodelocal_allnodes
=
116 IN6ADDR_NODELOCAL_ALLNODES_INIT
;
117 const struct in6_addr kin6addr_linklocal_allnodes
=
118 IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
119 const struct in6_addr kin6addr_linklocal_allrouters
=
120 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
122 const struct in6_addr in6mask0
= IN6MASK0
;
123 const struct in6_addr in6mask32
= IN6MASK32
;
124 const struct in6_addr in6mask64
= IN6MASK64
;
125 const struct in6_addr in6mask96
= IN6MASK96
;
126 const struct in6_addr in6mask128
= IN6MASK128
;
128 const struct sockaddr_in6 sa6_any
= {sizeof(sa6_any
), AF_INET6
,
129 0, 0, IN6ADDR_ANY_INIT
, 0};
131 static int in6_lifaddr_ioctl (u_long
, caddr_t
, struct ifnet
*,
133 static int in6_ifinit (struct ifnet
*, struct in6_ifaddr
*,
134 struct sockaddr_in6
*, int);
135 static void in6_unlink_ifa (struct in6_ifaddr
*, struct ifnet
*);
136 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo
*, struct rtentry
*, void *);
138 static void in6_control_internal_dispatch(netmsg_t
);
139 static int in6_control_internal(u_long
, caddr_t
, struct ifnet
*,
142 struct in6_multihead in6_multihead
; /* XXX BSS initialization */
145 * Subroutine for in6_ifaddloop() and in6_ifremloop().
146 * This routine does actual work.
149 in6_ifloop_request(int cmd
, struct ifaddr
*ifa
)
151 struct sockaddr_in6 all1_sa
;
152 struct rt_addrinfo rtinfo
;
155 bzero(&all1_sa
, sizeof(all1_sa
));
156 all1_sa
.sin6_family
= AF_INET6
;
157 all1_sa
.sin6_len
= sizeof(struct sockaddr_in6
);
158 all1_sa
.sin6_addr
= in6mask128
;
161 * We specify the address itself as the gateway, and set the
162 * RTF_LLINFO flag, so that the corresponding host route would have
163 * the flag, and thus applications that assume traditional behavior
164 * would be happy. Note that we assume the caller of the function
165 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
166 * which changes the outgoing interface to the loopback interface.
168 bzero(&rtinfo
, sizeof(struct rt_addrinfo
));
169 rtinfo
.rti_info
[RTAX_DST
] = ifa
->ifa_addr
;
170 rtinfo
.rti_info
[RTAX_GATEWAY
] = ifa
->ifa_addr
;
171 rtinfo
.rti_info
[RTAX_NETMASK
] = (struct sockaddr
*)&all1_sa
;
172 rtinfo
.rti_flags
= RTF_UP
|RTF_HOST
|RTF_LLINFO
;
174 error
= rtrequest1_global(cmd
, &rtinfo
,
175 in6_ifloop_request_callback
, ifa
, RTREQ_PRIO_NORM
);
177 log(LOG_ERR
, "in6_ifloop_request: "
178 "%s operation failed for %s (errno=%d)\n",
179 cmd
== RTM_ADD
? "ADD" : "DELETE",
180 ip6_sprintf(&((struct in6_ifaddr
*)ifa
)->ia_addr
.sin6_addr
),
186 in6_ifloop_request_callback(int cmd
, int error
, struct rt_addrinfo
*rtinfo
,
187 struct rtentry
*rt
, void *arg
)
189 struct ifaddr
*ifa
= arg
;
195 * Make sure rt_ifa be equal to IFA, the second argument of the
197 * We need this because when we refer to rt_ifa->ia6_flags in
198 * ip6_input, we assume that the rt_ifa points to the address instead
199 * of the loopback address.
201 if (cmd
== RTM_ADD
&& rt
&& ifa
!= rt
->rt_ifa
) {
210 * Report the addition/removal of the address to the routing socket.
211 * XXX: since we called rtinit for a p2p interface with a destination,
212 * we end up reporting twice in such a case. Should we rather
213 * omit the second report?
217 rt_newaddrmsg(cmd
, ifa
, error
, rt
);
218 if (cmd
== RTM_DELETE
) {
219 if (rt
->rt_refcnt
== 0) {
226 /* no way to return any new error */
231 * Add ownaddr as loopback rtentry. We previously add the route only if
232 * necessary (ex. on a p2p link). However, since we now manage addresses
233 * separately from prefixes, we should always add the route. We can't
234 * rely on the cloning mechanism from the corresponding interface route
238 in6_ifaddloop(struct ifaddr
*ifa
)
242 /* If there is no loopback entry, allocate one. */
243 rt
= rtpurelookup(ifa
->ifa_addr
);
244 if (rt
== NULL
|| !(rt
->rt_flags
& RTF_HOST
) ||
245 !(rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
))
246 in6_ifloop_request(RTM_ADD
, ifa
);
252 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
256 in6_ifremloop(struct ifaddr
*ifa
)
258 struct in6_ifaddr
*ia
;
263 * Some of BSD variants do not remove cloned routes
264 * from an interface direct route, when removing the direct route
265 * (see comments in net/net_osdep.h). Even for variants that do remove
266 * cloned routes, they could fail to remove the cloned routes when
267 * we handle multple addresses that share a common prefix.
268 * So, we should remove the route corresponding to the deleted address
269 * regardless of the result of in6_is_ifloop_auto().
273 * Delete the entry only if exact one ifa exists. More than one ifa
274 * can exist if we assign a same single address to multiple
275 * (probably p2p) interfaces.
276 * XXX: we should avoid such a configuration in IPv6...
278 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
279 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa
), &ia
->ia_addr
.sin6_addr
)) {
288 * Before deleting, check if a corresponding loopbacked host
289 * route surely exists. With this check, we can avoid to
290 * delete an interface direct route whose destination is same
291 * as the address being removed. This can happen when remofing
292 * a subnet-router anycast address on an interface attahced
293 * to a shared medium.
295 rt
= rtpurelookup(ifa
->ifa_addr
);
296 if (rt
!= NULL
&& (rt
->rt_flags
& RTF_HOST
) &&
297 (rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
)) {
299 in6_ifloop_request(RTM_DELETE
, ifa
);
305 in6_mask2len(const struct in6_addr
*mask
, const u_char
*lim0
)
308 const u_char
*lim
= lim0
, *p
;
311 lim0
- (const u_char
*)mask
> sizeof(*mask
)) {
312 /* Ignore the scope_id part */
313 lim
= (const u_char
*)mask
+ sizeof(*mask
);
315 for (p
= (const u_char
*)mask
; p
< lim
; x
++, p
++) {
321 for (y
= 0; y
< 8; y
++) {
322 if ((*p
& (0x80 >> y
)) == 0)
328 * When the limit pointer is given, do a stricter check on the
332 if (y
!= 0 && (*p
& (0x00ff >> y
)) != 0)
334 for (p
= p
+ 1; p
< lim
; p
++)
342 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
343 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
346 in6_control_dispatch(netmsg_t msg
)
350 error
= in6_control(msg
->control
.nm_cmd
,
351 msg
->control
.nm_data
,
354 lwkt_replymsg(&msg
->control
.base
.lmsg
, error
);
358 in6_control(u_long cmd
, caddr_t data
, struct ifnet
*ifp
, struct thread
*td
)
360 struct netmsg_pru_control msg
;
363 case SIOCSIFPREFIX_IN6
:
364 case SIOCDIFPREFIX_IN6
:
365 case SIOCAIFPREFIX_IN6
:
366 case SIOCCIFPREFIX_IN6
:
367 case SIOCSGIFPREFIX_IN6
:
368 case SIOCGIFPREFIX_IN6
:
369 log(LOG_NOTICE
, "prefix ioctls are now invalidated. "
370 "please use ifconfig.\n");
373 case SIOCSIFADDR_IN6
:
374 case SIOCSIFDSTADDR_IN6
:
375 case SIOCSIFNETMASK_IN6
:
377 * Since IPv6 allows a node to assign multiple addresses
378 * on a single interface, SIOCSIFxxx ioctls are not suitable
379 * and should be unused.
381 /* We decided to obsolete this command (20000704) */
389 * Do not pass those ioctl to driver handler since they are not
390 * properly setup. Instead just error out.
395 case SIOCGETSGCNT_IN6
:
396 case SIOCGETMIFCNT_IN6
:
398 case SIOCAADDRCTL_POLICY
:
399 case SIOCDADDRCTL_POLICY
:
401 case SIOCSNDFLUSH_IN6
:
402 case SIOCSPFXFLUSH_IN6
:
403 case SIOCSRTRFLUSH_IN6
:
404 case SIOCSDEFIFACE_IN6
:
405 case SIOCSIFINFO_FLAGS
:
406 case OSIOCGIFINFO_IN6
:
407 case SIOCGIFINFO_IN6
:
410 case SIOCGNBRINFO_IN6
:
411 case SIOCGDEFIFACE_IN6
:
419 case SIOCSIFALIFETIME_IN6
:
420 case SIOCAIFADDR_IN6
:
421 case SIOCDIFADDR_IN6
:
423 * Dispatch these SIOCs to netisr0.
425 netmsg_init(&msg
.base
, NULL
, &curthread
->td_msgport
, 0,
426 in6_control_internal_dispatch
);
431 lwkt_domsg(netisr_cpuport(0), &msg
.base
.lmsg
, 0);
432 return msg
.base
.lmsg
.ms_error
;
435 return in6_control_internal(cmd
, data
, ifp
, td
);
440 in6_control_internal_dispatch(netmsg_t msg
)
444 error
= in6_control_internal(msg
->control
.nm_cmd
, msg
->control
.nm_data
,
445 msg
->control
.nm_ifp
, msg
->control
.nm_td
);
446 lwkt_replymsg(&msg
->lmsg
, error
);
450 in6_control_internal(u_long cmd
, caddr_t data
, struct ifnet
*ifp
,
453 struct in6_ifreq
*ifr
= (struct in6_ifreq
*)data
;
454 struct in6_ifaddr
*ia
= NULL
;
455 struct in6_aliasreq
*ifra
= (struct in6_aliasreq
*)data
;
456 struct in6_ifextra
*xtra
;
457 boolean_t privileged
;
461 if (priv_check(td
, PRIV_ROOT
) == 0)
473 return in6_lifaddr_ioctl(cmd
, data
, ifp
, td
);
477 case SIOCGETSGCNT_IN6
:
478 case SIOCGETMIFCNT_IN6
:
479 return (mrt6_ioctl(cmd
, data
));
483 case SIOCAADDRCTL_POLICY
:
484 case SIOCDADDRCTL_POLICY
:
487 return (in6_src_ioctl(cmd
, data
));
494 case SIOCSNDFLUSH_IN6
:
495 case SIOCSPFXFLUSH_IN6
:
496 case SIOCSRTRFLUSH_IN6
:
497 case SIOCSDEFIFACE_IN6
:
498 case SIOCSIFINFO_FLAGS
:
502 case OSIOCGIFINFO_IN6
:
503 case SIOCGIFINFO_IN6
:
506 case SIOCGNBRINFO_IN6
:
507 case SIOCGDEFIFACE_IN6
:
508 return (nd6_ioctl(cmd
, data
, ifp
));
515 return (scope6_set(ifp
,
516 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
519 return (scope6_get(ifp
,
520 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
523 return (scope6_get_default((struct scope6_id
*)
524 ifr
->ifr_ifru
.ifru_scope_id
));
528 * Find address for this interface, if it exists.
530 if (ifra
->ifra_addr
.sin6_family
== AF_INET6
) { /* XXX */
531 struct sockaddr_in6
*sa6
=
532 (struct sockaddr_in6
*)&ifra
->ifra_addr
;
534 if (IN6_IS_ADDR_LINKLOCAL(&sa6
->sin6_addr
)) {
535 if (sa6
->sin6_addr
.s6_addr16
[1] == 0) {
536 /* Link ID is not embedded by the user */
537 sa6
->sin6_addr
.s6_addr16
[1] =
538 htons(ifp
->if_index
);
539 } else if (sa6
->sin6_addr
.s6_addr16
[1] !=
540 htons(ifp
->if_index
)) {
541 /* Link ID contradicts */
544 if (sa6
->sin6_scope_id
) {
545 if (sa6
->sin6_scope_id
!=
546 (u_int32_t
)ifp
->if_index
)
548 sa6
->sin6_scope_id
= 0; /* XXX: good way? */
551 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
555 case SIOCDIFADDR_IN6
:
557 * For IPv4, we look for existing in_ifaddr here to allow
558 * "ifconfig if0 delete" to remove first IPv4 address on the
559 * interface. For IPv6, as the spec allow multiple interface
560 * address from the day one, we consider "remove the first one"
561 * semantics to be not preferable.
564 return (EADDRNOTAVAIL
);
566 case SIOCAIFADDR_IN6
:
568 * We always require users to specify a valid IPv6 address for
569 * the corresponding operation.
571 if (ifra
->ifra_addr
.sin6_family
!= AF_INET6
||
572 ifra
->ifra_addr
.sin6_len
!= sizeof(struct sockaddr_in6
))
573 return (EAFNOSUPPORT
);
578 case SIOCGIFADDR_IN6
:
579 /* This interface is basically deprecated. Use SIOCGIFCONF. */
581 case SIOCGIFAFLAG_IN6
:
582 case SIOCGIFNETMASK_IN6
:
583 case SIOCGIFDSTADDR_IN6
:
584 case SIOCGIFALIFETIME_IN6
:
585 /* Must think again about its semantics */
587 return (EADDRNOTAVAIL
);
590 case SIOCSIFALIFETIME_IN6
:
592 const struct in6_addrlifetime
*lt
;
597 return (EADDRNOTAVAIL
);
598 /* Sanity for overflow - beware unsigned */
599 lt
= &ifr
->ifr_ifru
.ifru_lifetime
;
600 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
&&
601 lt
->ia6t_vltime
+ time_uptime
< time_uptime
)
603 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
&&
604 lt
->ia6t_pltime
+ time_uptime
< time_uptime
)
611 case SIOCGIFADDR_IN6
:
612 ifr
->ifr_addr
= ia
->ia_addr
;
615 case SIOCGIFDSTADDR_IN6
:
616 if (!(ifp
->if_flags
& IFF_POINTOPOINT
))
619 * XXX: Should we check if ifa_dstaddr is NULL and return
622 ifr
->ifr_dstaddr
= ia
->ia_dstaddr
;
625 case SIOCGIFNETMASK_IN6
:
626 ifr
->ifr_addr
= ia
->ia_prefixmask
;
629 case SIOCGIFAFLAG_IN6
:
630 ifr
->ifr_ifru
.ifru_flags6
= ia
->ia6_flags
;
633 case SIOCGIFSTAT_IN6
:
634 if ((xtra
= ifp
->if_afdata
[AF_INET6
]) == NULL
)
636 bzero(&ifr
->ifr_ifru
.ifru_stat
,
637 sizeof(ifr
->ifr_ifru
.ifru_stat
));
638 ifr
->ifr_ifru
.ifru_stat
= *xtra
->in6_ifstat
;
641 case SIOCGIFSTAT_ICMP6
:
642 if ((xtra
= ifp
->if_afdata
[AF_INET6
]) == NULL
)
644 bzero(&ifr
->ifr_ifru
.ifru_stat
,
645 sizeof(ifr
->ifr_ifru
.ifru_icmp6stat
));
646 ifr
->ifr_ifru
.ifru_icmp6stat
= *xtra
->icmp6_ifstat
;
649 case SIOCGIFALIFETIME_IN6
:
650 ifr
->ifr_ifru
.ifru_lifetime
= ia
->ia6_lifetime
;
653 case SIOCSIFALIFETIME_IN6
:
654 ia
->ia6_lifetime
= ifr
->ifr_ifru
.ifru_lifetime
;
655 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
656 ia
->ia6_lifetime
.ia6t_expire
=
657 time_uptime
+ ia
->ia6_lifetime
.ia6t_vltime
;
659 ia
->ia6_lifetime
.ia6t_expire
= 0;
661 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
662 ia
->ia6_lifetime
.ia6t_preferred
=
663 time_uptime
+ ia
->ia6_lifetime
.ia6t_pltime
;
665 ia
->ia6_lifetime
.ia6t_preferred
= 0;
669 case SIOCAIFADDR_IN6
:
671 int i
, error
= 0, iaIsNew
;
672 struct nd_prefix pr0
, *pr
;
680 * First, make or update the interface address structure,
681 * and link it to the list.
683 if ((error
= in6_update_ifa(ifp
, ifra
, ia
)) != 0)
687 * Then, make the prefix on-link on the interface.
688 * XXX: We'd rather create the prefix before the address, but
689 * we need at least one address to install the corresponding
690 * interface route, so we configure the address first.
694 * Convert mask to prefix length (prefixmask has already
695 * been validated in in6_update_ifa().
697 bzero(&pr0
, sizeof(pr0
));
699 pr0
.ndpr_plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
701 if (pr0
.ndpr_plen
== 128)
702 break; /* no need to install a host route. */
703 pr0
.ndpr_prefix
= ifra
->ifra_addr
;
704 pr0
.ndpr_mask
= ifra
->ifra_prefixmask
.sin6_addr
;
705 /* Apply the mask for safety. */
706 for (i
= 0; i
< 4; i
++) {
707 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
708 ifra
->ifra_prefixmask
.sin6_addr
.s6_addr32
[i
];
711 * XXX: Since we don't have an API to set prefix (not address)
712 * lifetimes, we just use the same lifetimes as addresses.
713 * The (temporarily) installed lifetimes can be overridden by
714 * later advertised RAs (when accept_rtadv is non 0), which is
715 * an intended behavior.
717 pr0
.ndpr_raf_onlink
= 1; /* should be configurable? */
719 ((ifra
->ifra_flags
& IN6_IFF_AUTOCONF
) != 0);
720 pr0
.ndpr_vltime
= ifra
->ifra_lifetime
.ia6t_vltime
;
721 pr0
.ndpr_pltime
= ifra
->ifra_lifetime
.ia6t_pltime
;
723 /* Add the prefix if there's one. */
724 if ((pr
= nd6_prefix_lookup(&pr0
)) == NULL
) {
726 * nd6_prelist_add will install the corresponding
729 if ((error
= nd6_prelist_add(&pr0
, NULL
, &pr
)) != 0)
732 log(LOG_ERR
, "nd6_prelist_add succeeded but "
734 return (EINVAL
); /* XXX panic here? */
738 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
740 /* XXX: This should not happen! */
741 log(LOG_ERR
, "in6_control: addition succeeded, but"
744 if ((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
745 ia
->ia6_ndpr
== NULL
) {
747 * New autoconf address
753 * If this is the first autoconf address from
754 * the prefix, create a temporary address
755 * as well (when specified).
757 if (ip6_use_tempaddr
&& pr
->ndpr_refcnt
== 1) {
760 if ((e
= in6_tmpifadd(ia
, 1)) != 0) {
761 log(LOG_NOTICE
, "in6_control: "
762 "failed to create a "
763 "temporary address, "
770 * This might affect the status of autoconfigured
771 * addresses, that is, this address might make
772 * other addresses detached.
774 pfxlist_onlink_check();
776 if (error
== 0 && ia
) {
777 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
,
778 iaIsNew
? IFADDR_EVENT_ADD
: IFADDR_EVENT_CHANGE
,
784 case SIOCDIFADDR_IN6
:
787 struct nd_prefix pr0
, *pr
;
790 * If the address being deleted is the only one that owns
791 * the corresponding prefix, expire the prefix as well.
792 * XXX: Theoretically, we don't have to warry about such
793 * relationship, since we separate the address management
794 * and the prefix management. We do this, however, to provide
795 * as much backward compatibility as possible in terms of
796 * the ioctl operation.
798 bzero(&pr0
, sizeof(pr0
));
800 pr0
.ndpr_plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
802 if (pr0
.ndpr_plen
== 128)
804 pr0
.ndpr_prefix
= ia
->ia_addr
;
805 pr0
.ndpr_mask
= ia
->ia_prefixmask
.sin6_addr
;
806 for (i
= 0; i
< 4; i
++) {
807 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
808 ia
->ia_prefixmask
.sin6_addr
.s6_addr32
[i
];
811 * The logic of the following condition is a bit complicated.
812 * We expire the prefix when
813 * 1. The address obeys autoconfiguration and it is the
814 * only owner of the associated prefix, or
815 * 2. The address does not obey autoconf and there is no
816 * other owner of the prefix.
818 if ((pr
= nd6_prefix_lookup(&pr0
)) != NULL
&&
819 (((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
820 pr
->ndpr_refcnt
== 1) ||
821 (!(ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
822 pr
->ndpr_refcnt
== 0)))
823 pr
->ndpr_expire
= 1; /* XXX: just for expiration */
826 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
, IFADDR_EVENT_DELETE
,
828 in6_purgeaddr(&ia
->ia_ifa
);
833 if (ifp
->if_ioctl
== NULL
)
835 ifnet_serialize_all(ifp
);
836 error
= ifp
->if_ioctl(ifp
, cmd
, data
, td
->td_proc
->p_ucred
);
837 ifnet_deserialize_all(ifp
);
845 * Update parameters of an IPv6 interface address.
846 * If necessary, a new entry is created and linked into address chains.
847 * This function is separated from in6_control().
848 * XXX: should this be performed under splnet()?
851 in6_update_ifa(struct ifnet
*ifp
, struct in6_aliasreq
*ifra
,
852 struct in6_ifaddr
*ia
)
854 int error
= 0, hostIsNew
= 0, plen
= -1;
855 struct in6_ifaddr
*oia
;
856 struct sockaddr_in6 dst6
;
857 struct in6_addrlifetime
*lt
;
859 /* Validate parameters */
860 if (ifp
== NULL
|| ifra
== NULL
) /* this maybe redundant */
864 * The destination address for a p2p link must have a family
865 * of AF_UNSPEC or AF_INET6.
867 if ((ifp
->if_flags
& IFF_POINTOPOINT
) &&
868 ifra
->ifra_dstaddr
.sin6_family
!= AF_INET6
&&
869 ifra
->ifra_dstaddr
.sin6_family
!= AF_UNSPEC
)
870 return (EAFNOSUPPORT
);
872 * validate ifra_prefixmask. don't check sin6_family, netmask
873 * does not carry fields other than sin6_len.
875 if (ifra
->ifra_prefixmask
.sin6_len
> sizeof(struct sockaddr_in6
))
878 * Because the IPv6 address architecture is classless, we require
879 * users to specify a (non 0) prefix length (mask) for a new address.
880 * We also require the prefix (when specified) mask is valid, and thus
881 * reject a non-consecutive mask.
883 if (ia
== NULL
&& ifra
->ifra_prefixmask
.sin6_len
== 0)
885 if (ifra
->ifra_prefixmask
.sin6_len
!= 0) {
886 plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
887 (u_char
*)&ifra
->ifra_prefixmask
+
888 ifra
->ifra_prefixmask
.sin6_len
);
894 * In this case, ia must not be NULL. We just use its prefix
897 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
);
900 * If the destination address on a p2p interface is specified,
901 * and the address is a scoped one, validate/set the scope
904 dst6
= ifra
->ifra_dstaddr
;
905 if ((ifp
->if_flags
& (IFF_POINTOPOINT
|IFF_LOOPBACK
)) &&
906 (dst6
.sin6_family
== AF_INET6
)) {
909 if ((error
= in6_recoverscope(&dst6
,
910 &ifra
->ifra_dstaddr
.sin6_addr
,
913 if (in6_addr2zoneid(ifp
, &dst6
.sin6_addr
, &scopeid
))
915 if (dst6
.sin6_scope_id
== 0) /* user omit to specify the ID. */
916 dst6
.sin6_scope_id
= scopeid
;
917 else if (dst6
.sin6_scope_id
!= scopeid
)
918 return (EINVAL
); /* scope ID mismatch. */
919 if ((error
= in6_embedscope(&dst6
.sin6_addr
, &dst6
, NULL
, NULL
))
922 dst6
.sin6_scope_id
= 0; /* XXX */
925 * The destination address can be specified only for a p2p or a
926 * loopback interface. If specified, the corresponding prefix length
929 if (ifra
->ifra_dstaddr
.sin6_family
== AF_INET6
) {
930 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) == 0) {
931 /* XXX: noisy message */
932 log(LOG_INFO
, "in6_update_ifa: a destination can be "
933 "specified for a p2p or a loopback IF only\n");
938 * The following message seems noisy, but we dare to
939 * add it for diagnosis.
941 log(LOG_INFO
, "in6_update_ifa: prefixlen must be 128 "
942 "when dstaddr is specified\n");
946 /* lifetime consistency check */
947 lt
= &ifra
->ifra_lifetime
;
948 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
949 && lt
->ia6t_vltime
+ time_uptime
< time_uptime
) {
952 if (lt
->ia6t_vltime
== 0) {
954 * the following log might be noisy, but this is a typical
955 * configuration mistake or a tool's bug.
958 "in6_update_ifa: valid lifetime is 0 for %s\n",
959 ip6_sprintf(&ifra
->ifra_addr
.sin6_addr
));
961 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
962 && lt
->ia6t_pltime
+ time_uptime
< time_uptime
) {
967 * If this is a new address, allocate a new ifaddr and link it
972 ia
= ifa_create(sizeof(*ia
));
974 /* Initialize the address and masks */
975 ia
->ia_ifa
.ifa_addr
= (struct sockaddr
*)&ia
->ia_addr
;
976 ia
->ia_addr
.sin6_family
= AF_INET6
;
977 ia
->ia_addr
.sin6_len
= sizeof(ia
->ia_addr
);
978 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) != 0) {
980 * XXX: some functions expect that ifa_dstaddr is not
981 * NULL for p2p interfaces.
983 ia
->ia_ifa
.ifa_dstaddr
984 = (struct sockaddr
*)&ia
->ia_dstaddr
;
986 ia
->ia_ifa
.ifa_dstaddr
= NULL
;
988 ia
->ia_ifa
.ifa_netmask
989 = (struct sockaddr
*)&ia
->ia_prefixmask
;
992 if ((oia
= in6_ifaddr
) != NULL
) {
993 for ( ; oia
->ia_next
; oia
= oia
->ia_next
)
999 ifa_iflink(&ia
->ia_ifa
, ifp
, 1);
1002 /* set prefix mask */
1003 if (ifra
->ifra_prefixmask
.sin6_len
) {
1005 * We prohibit changing the prefix length of an existing
1007 * + such an operation should be rare in IPv6, and
1008 * + the operation would confuse prefix management.
1010 if (ia
->ia_prefixmask
.sin6_len
&&
1011 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
) != plen
) {
1012 log(LOG_INFO
, "in6_update_ifa: the prefix length of an"
1013 " existing (%s) address should not be changed\n",
1014 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
1018 ia
->ia_prefixmask
= ifra
->ifra_prefixmask
;
1022 * If a new destination address is specified, scrub the old one and
1023 * install the new destination. Note that the interface must be
1024 * p2p or loopback (see the check above.)
1026 if (dst6
.sin6_family
== AF_INET6
&&
1027 !IN6_ARE_ADDR_EQUAL(&dst6
.sin6_addr
,
1028 &ia
->ia_dstaddr
.sin6_addr
)) {
1031 if ((ia
->ia_flags
& IFA_ROUTE
) &&
1032 (e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
1034 log(LOG_ERR
, "in6_update_ifa: failed to remove "
1035 "a route to the old destination: %s\n",
1036 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
1037 /* proceed anyway... */
1040 ia
->ia_flags
&= ~IFA_ROUTE
;
1041 ia
->ia_dstaddr
= dst6
;
1044 /* reset the interface and routing table appropriately. */
1045 if ((error
= in6_ifinit(ifp
, ia
, &ifra
->ifra_addr
, hostIsNew
)) != 0)
1049 * Beyond this point, we should call in6_purgeaddr upon an error,
1050 * not just go to unlink.
1053 if (ifp
->if_flags
& IFF_MULTICAST
) {
1054 struct sockaddr_in6 mltaddr
, mltmask
;
1055 struct in6_multi
*in6m
;
1059 * join solicited multicast addr for new host id
1061 struct in6_addr llsol
;
1062 bzero(&llsol
, sizeof(struct in6_addr
));
1063 llsol
.s6_addr16
[0] = htons(0xff02);
1064 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1065 llsol
.s6_addr32
[1] = 0;
1066 llsol
.s6_addr32
[2] = htonl(1);
1067 llsol
.s6_addr32
[3] =
1068 ifra
->ifra_addr
.sin6_addr
.s6_addr32
[3];
1069 llsol
.s6_addr8
[12] = 0xff;
1070 in6_addmulti(&llsol
, ifp
, &error
);
1073 "in6_update_ifa: addmulti failed for "
1074 "%s on %s (errno=%d)\n",
1075 ip6_sprintf(&llsol
), if_name(ifp
),
1077 in6_purgeaddr((struct ifaddr
*)ia
);
1082 bzero(&mltmask
, sizeof(mltmask
));
1083 mltmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1084 mltmask
.sin6_family
= AF_INET6
;
1085 mltmask
.sin6_addr
= in6mask32
;
1088 * join link-local all-nodes address
1090 bzero(&mltaddr
, sizeof(mltaddr
));
1091 mltaddr
.sin6_len
= sizeof(struct sockaddr_in6
);
1092 mltaddr
.sin6_family
= AF_INET6
;
1093 mltaddr
.sin6_addr
= kin6addr_linklocal_allnodes
;
1094 mltaddr
.sin6_addr
.s6_addr16
[1] = htons(ifp
->if_index
);
1096 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1098 rtrequest_global(RTM_ADD
,
1099 (struct sockaddr
*)&mltaddr
,
1100 (struct sockaddr
*)&ia
->ia_addr
,
1101 (struct sockaddr
*)&mltmask
,
1102 RTF_UP
|RTF_CLONING
); /* xxx */
1103 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1106 "in6_update_ifa: addmulti failed for "
1107 "%s on %s (errno=%d)\n",
1108 ip6_sprintf(&mltaddr
.sin6_addr
),
1109 if_name(ifp
), error
);
1114 * join node information group address
1116 #define hostnamelen strlen(hostname)
1117 if (in6_nigroup(ifp
, hostname
, hostnamelen
, &mltaddr
.sin6_addr
)
1119 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1120 if (in6m
== NULL
&& ia
!= NULL
) {
1121 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1123 log(LOG_WARNING
, "in6_update_ifa: "
1124 "addmulti failed for "
1125 "%s on %s (errno=%d)\n",
1126 ip6_sprintf(&mltaddr
.sin6_addr
),
1127 if_name(ifp
), error
);
1134 * join node-local all-nodes address, on loopback.
1135 * XXX: since "node-local" is obsoleted by interface-local,
1136 * we have to join the group on every interface with
1137 * some interface-boundary restriction.
1139 if (ifp
->if_flags
& IFF_LOOPBACK
) {
1140 struct in6_ifaddr
*ia_loop
;
1142 struct in6_addr loop6
= kin6addr_loopback
;
1143 ia_loop
= in6ifa_ifpwithaddr(ifp
, &loop6
);
1145 mltaddr
.sin6_addr
= kin6addr_nodelocal_allnodes
;
1147 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1148 if (in6m
== NULL
&& ia_loop
!= NULL
) {
1149 rtrequest_global(RTM_ADD
,
1150 (struct sockaddr
*)&mltaddr
,
1151 (struct sockaddr
*)&ia_loop
->ia_addr
,
1152 (struct sockaddr
*)&mltmask
,
1154 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1156 log(LOG_WARNING
, "in6_update_ifa: "
1157 "addmulti failed for %s on %s "
1159 ip6_sprintf(&mltaddr
.sin6_addr
),
1160 if_name(ifp
), error
);
1166 ia
->ia6_flags
= ifra
->ifra_flags
;
1167 ia
->ia6_flags
&= ~IN6_IFF_DUPLICATED
; /*safety*/
1168 ia
->ia6_flags
&= ~IN6_IFF_NODAD
; /* Mobile IPv6 */
1170 ia
->ia6_lifetime
= ifra
->ifra_lifetime
;
1172 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
1173 ia
->ia6_lifetime
.ia6t_expire
=
1174 time_uptime
+ ia
->ia6_lifetime
.ia6t_vltime
;
1176 ia
->ia6_lifetime
.ia6t_expire
= 0;
1177 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
1178 ia
->ia6_lifetime
.ia6t_preferred
=
1179 time_uptime
+ ia
->ia6_lifetime
.ia6t_pltime
;
1181 ia
->ia6_lifetime
.ia6t_preferred
= 0;
1184 * Perform DAD, if needed.
1185 * XXX It may be of use, if we can administratively
1188 if (in6if_do_dad(ifp
) && !(ifra
->ifra_flags
& IN6_IFF_NODAD
)) {
1189 ia
->ia6_flags
|= IN6_IFF_TENTATIVE
;
1190 nd6_dad_start((struct ifaddr
*)ia
, NULL
);
1197 * XXX: if a change of an existing address failed, keep the entry
1201 in6_unlink_ifa(ia
, ifp
);
1206 in6_purgeaddr(struct ifaddr
*ifa
)
1208 struct ifnet
*ifp
= ifa
->ifa_ifp
;
1209 struct in6_ifaddr
*ia
= (struct in6_ifaddr
*) ifa
;
1211 /* stop DAD processing */
1215 * delete route to the destination of the address being purged.
1216 * The interface must be p2p or loopback in this case.
1218 if ((ia
->ia_flags
& IFA_ROUTE
) && ia
->ia_dstaddr
.sin6_len
!= 0) {
1221 if ((e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
1223 log(LOG_ERR
, "in6_purgeaddr: failed to remove "
1224 "a route to the p2p destination: %s on %s, "
1226 ip6_sprintf(&ia
->ia_addr
.sin6_addr
), if_name(ifp
),
1228 /* proceed anyway... */
1231 ia
->ia_flags
&= ~IFA_ROUTE
;
1234 /* Remove ownaddr's loopback rtentry, if it exists. */
1235 in6_ifremloop(&(ia
->ia_ifa
));
1237 if (ifp
->if_flags
& IFF_MULTICAST
) {
1239 * delete solicited multicast addr for deleting host id
1241 struct in6_multi
*in6m
;
1242 struct in6_addr llsol
;
1243 bzero(&llsol
, sizeof(struct in6_addr
));
1244 llsol
.s6_addr16
[0] = htons(0xff02);
1245 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1246 llsol
.s6_addr32
[1] = 0;
1247 llsol
.s6_addr32
[2] = htonl(1);
1248 llsol
.s6_addr32
[3] =
1249 ia
->ia_addr
.sin6_addr
.s6_addr32
[3];
1250 llsol
.s6_addr8
[12] = 0xff;
1252 in6m
= IN6_LOOKUP_MULTI(&llsol
, ifp
);
1257 in6_unlink_ifa(ia
, ifp
);
1261 in6_unlink_ifa(struct in6_ifaddr
*ia
, struct ifnet
*ifp
)
1263 struct in6_ifaddr
*oia
;
1267 ifa_ifunlink(&ia
->ia_ifa
, ifp
);
1270 if (oia
== (ia
= in6_ifaddr
))
1271 in6_ifaddr
= ia
->ia_next
;
1273 while (ia
->ia_next
&& (ia
->ia_next
!= oia
))
1276 ia
->ia_next
= oia
->ia_next
;
1279 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1284 * When an autoconfigured address is being removed, release the
1285 * reference to the base prefix. Also, since the release might
1286 * affect the status of other (detached) addresses, call
1287 * pfxlist_onlink_check().
1289 if (oia
->ia6_flags
& IN6_IFF_AUTOCONF
) {
1290 if (oia
->ia6_ndpr
== NULL
) {
1291 log(LOG_NOTICE
, "in6_unlink_ifa: autoconf'ed address "
1292 "%p has no prefix\n", oia
);
1294 oia
->ia6_ndpr
->ndpr_refcnt
--;
1295 oia
->ia6_flags
&= ~IN6_IFF_AUTOCONF
;
1296 oia
->ia6_ndpr
= NULL
;
1299 pfxlist_onlink_check();
1303 * release another refcnt for the link from in6_ifaddr.
1304 * Note that we should decrement the refcnt at least once for all *BSD.
1306 ifa_destroy(&oia
->ia_ifa
);
1312 in6_purgeif(struct ifnet
*ifp
)
1314 struct ifaddr_container
*ifac
, *next
;
1316 TAILQ_FOREACH_MUTABLE(ifac
, &ifp
->if_addrheads
[mycpuid
],
1318 if (ifac
->ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1320 in6_purgeaddr(ifac
->ifa
);
1328 * SIOCGLIFADDR: get first address. (?)
1329 * SIOCGLIFADDR with IFLR_PREFIX:
1330 * get first address that matches the specified prefix.
1331 * SIOCALIFADDR: add the specified address.
1332 * SIOCALIFADDR with IFLR_PREFIX:
1333 * add the specified prefix, filling hostid part from
1334 * the first link-local address. prefixlen must be <= 64.
1335 * SIOCDLIFADDR: delete the specified address.
1336 * SIOCDLIFADDR with IFLR_PREFIX:
1337 * delete the first address that matches the specified prefix.
1339 * EINVAL on invalid parameters
1340 * EADDRNOTAVAIL on prefix match failed/specified address not found
1341 * other values may be returned from in6_ioctl()
1343 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1344 * this is to accomodate address naming scheme other than RFC2374,
1346 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1347 * address encoding scheme. (see figure on page 8)
1350 in6_lifaddr_ioctl(u_long cmd
, caddr_t data
, struct ifnet
*ifp
,
1353 struct if_laddrreq
*iflr
= (struct if_laddrreq
*)data
;
1354 struct sockaddr
*sa
;
1357 if (!data
|| !ifp
) {
1358 panic("invalid argument to in6_lifaddr_ioctl");
1364 /* address must be specified on GET with IFLR_PREFIX */
1365 if (!(iflr
->flags
& IFLR_PREFIX
))
1370 /* address must be specified on ADD and DELETE */
1371 sa
= (struct sockaddr
*)&iflr
->addr
;
1372 if (sa
->sa_family
!= AF_INET6
)
1374 if (sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1376 /* XXX need improvement */
1377 sa
= (struct sockaddr
*)&iflr
->dstaddr
;
1378 if (sa
->sa_family
&& sa
->sa_family
!= AF_INET6
)
1380 if (sa
->sa_len
&& sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1383 default: /* shouldn't happen */
1385 panic("invalid cmd to in6_lifaddr_ioctl");
1391 if (sizeof(struct in6_addr
) * 8 < iflr
->prefixlen
)
1397 struct in6_aliasreq ifra
;
1398 struct in6_addr
*hostid
= NULL
;
1401 if (iflr
->flags
& IFLR_PREFIX
) {
1403 struct sockaddr_in6
*sin6
;
1406 * hostid is to fill in the hostid part of the
1407 * address. hostid points to the first link-local
1408 * address attached to the interface.
1410 ifa
= (struct ifaddr
*)in6ifa_ifpforlinklocal(ifp
, 0);
1412 return EADDRNOTAVAIL
;
1413 hostid
= IFA_IN6(ifa
);
1415 /* prefixlen must be <= 64. */
1416 if (64 < iflr
->prefixlen
)
1418 prefixlen
= iflr
->prefixlen
;
1420 /* hostid part must be zero. */
1421 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1422 if (sin6
->sin6_addr
.s6_addr32
[2] != 0
1423 || sin6
->sin6_addr
.s6_addr32
[3] != 0) {
1427 prefixlen
= iflr
->prefixlen
;
1429 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1430 bzero(&ifra
, sizeof(ifra
));
1431 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1432 sizeof(ifra
.ifra_name
));
1434 bcopy(&iflr
->addr
, &ifra
.ifra_addr
,
1435 ((struct sockaddr
*)&iflr
->addr
)->sa_len
);
1437 /* fill in hostid part */
1438 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[2] =
1439 hostid
->s6_addr32
[2];
1440 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[3] =
1441 hostid
->s6_addr32
[3];
1444 if (((struct sockaddr
*)&iflr
->dstaddr
)->sa_family
) { /*XXX*/
1445 bcopy(&iflr
->dstaddr
, &ifra
.ifra_dstaddr
,
1446 ((struct sockaddr
*)&iflr
->dstaddr
)->sa_len
);
1448 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[2] =
1449 hostid
->s6_addr32
[2];
1450 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[3] =
1451 hostid
->s6_addr32
[3];
1455 ifra
.ifra_prefixmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1456 in6_prefixlen2mask(&ifra
.ifra_prefixmask
.sin6_addr
, prefixlen
);
1458 ifra
.ifra_flags
= iflr
->flags
& ~IFLR_PREFIX
;
1459 return in6_control_internal(SIOCAIFADDR_IN6
, (caddr_t
)&ifra
,
1465 struct ifaddr_container
*ifac
;
1466 struct in6_ifaddr
*ia
;
1467 struct in6_addr mask
, candidate
, match
;
1468 struct sockaddr_in6
*sin6
;
1471 bzero(&mask
, sizeof(mask
));
1472 if (iflr
->flags
& IFLR_PREFIX
) {
1473 /* lookup a prefix rather than address. */
1474 in6_prefixlen2mask(&mask
, iflr
->prefixlen
);
1476 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1477 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1478 match
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1479 match
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1480 match
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1481 match
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1483 /* if you set extra bits, that's wrong */
1484 if (bcmp(&match
, &sin6
->sin6_addr
, sizeof(match
)))
1489 if (cmd
== SIOCGLIFADDR
) {
1490 /* on getting an address, take the 1st match */
1493 /* on deleting an address, do exact match */
1494 in6_prefixlen2mask(&mask
, 128);
1495 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1496 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1502 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1503 struct ifaddr
*ifa
= ifac
->ifa
;
1505 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1510 bcopy(IFA_IN6(ifa
), &candidate
, sizeof(candidate
));
1512 * XXX: this is adhoc, but is necessary to allow
1513 * a user to specify fe80::/64 (not /10) for a
1514 * link-local address.
1516 if (IN6_IS_ADDR_LINKLOCAL(&candidate
))
1517 candidate
.s6_addr16
[1] = 0;
1518 candidate
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1519 candidate
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1520 candidate
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1521 candidate
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1522 if (IN6_ARE_ADDR_EQUAL(&candidate
, &match
))
1526 return EADDRNOTAVAIL
;
1527 ia
= ifa2ia6(ifac
->ifa
);
1529 if (cmd
== SIOCGLIFADDR
) {
1530 struct sockaddr_in6
*s6
;
1532 /* fill in the if_laddrreq structure */
1533 bcopy(&ia
->ia_addr
, &iflr
->addr
, ia
->ia_addr
.sin6_len
);
1534 s6
= (struct sockaddr_in6
*)&iflr
->addr
;
1535 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1536 s6
->sin6_addr
.s6_addr16
[1] = 0;
1537 if (in6_addr2zoneid(ifp
, &s6
->sin6_addr
,
1538 &s6
->sin6_scope_id
))
1539 return (EINVAL
);/* XXX */
1541 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
1542 bcopy(&ia
->ia_dstaddr
, &iflr
->dstaddr
,
1543 ia
->ia_dstaddr
.sin6_len
);
1544 s6
= (struct sockaddr_in6
*)&iflr
->dstaddr
;
1545 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1546 s6
->sin6_addr
.s6_addr16
[1] = 0;
1547 if (in6_addr2zoneid(ifp
,
1548 &s6
->sin6_addr
, &s6
->sin6_scope_id
))
1549 return (EINVAL
); /* EINVAL */
1552 bzero(&iflr
->dstaddr
, sizeof(iflr
->dstaddr
));
1555 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
1558 iflr
->flags
= ia
->ia6_flags
; /* XXX */
1562 struct in6_aliasreq ifra
;
1564 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1565 bzero(&ifra
, sizeof(ifra
));
1566 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1567 sizeof(ifra
.ifra_name
));
1569 bcopy(&ia
->ia_addr
, &ifra
.ifra_addr
,
1570 ia
->ia_addr
.sin6_len
);
1571 if (ifp
->if_flags
& IFF_POINTOPOINT
)
1572 bcopy(&ia
->ia_dstaddr
, &ifra
.ifra_dstaddr
,
1573 ia
->ia_dstaddr
.sin6_len
);
1575 bzero(&ifra
.ifra_dstaddr
,
1576 sizeof(ifra
.ifra_dstaddr
));
1577 bcopy(&ia
->ia_prefixmask
, &ifra
.ifra_dstaddr
,
1578 ia
->ia_prefixmask
.sin6_len
);
1580 ifra
.ifra_flags
= ia
->ia6_flags
;
1581 return in6_control_internal(SIOCDIFADDR_IN6
,
1582 (caddr_t
)&ifra
, ifp
, td
);
1587 return EOPNOTSUPP
; /* just for safety */
1591 * Initialize an interface's intetnet6 address
1592 * and routing table entry.
1595 in6_ifinit(struct ifnet
*ifp
, struct in6_ifaddr
*ia
, struct sockaddr_in6
*sin6
,
1598 int error
= 0, plen
;
1600 ia
->ia_addr
= *sin6
;
1602 if (ifp
->if_ioctl
!= NULL
) {
1603 ifnet_serialize_all(ifp
);
1604 error
= ifp
->if_ioctl(ifp
, SIOCSIFADDR
, (caddr_t
)ia
, NULL
);
1605 ifnet_deserialize_all(ifp
);
1610 ia
->ia_ifa
.ifa_metric
= ifp
->if_metric
;
1612 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1616 * If the destination address is specified for a point-to-point
1617 * interface, install a route to the destination as an interface
1620 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
); /* XXX */
1621 if (plen
== 128 && ia
->ia_dstaddr
.sin6_family
== AF_INET6
) {
1622 if ((error
= rtinit(&(ia
->ia_ifa
), (int)RTM_ADD
,
1623 RTF_UP
| RTF_HOST
)) != 0)
1625 ia
->ia_flags
|= IFA_ROUTE
;
1629 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1631 ia
->ia_ifa
.ifa_flags
|= RTF_CLONING
;
1634 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1636 /* set the rtrequest function to create llinfo */
1637 ia
->ia_ifa
.ifa_rtrequest
= nd6_rtrequest
;
1638 in6_ifaddloop(&(ia
->ia_ifa
));
1644 struct in6_multi_mship
*
1645 in6_joingroup(struct ifnet
*ifp
, struct in6_addr
*addr
, int *errorp
)
1647 struct in6_multi_mship
*imm
;
1649 imm
= kmalloc(sizeof(*imm
), M_IPMADDR
, M_NOWAIT
);
1654 imm
->i6mm_maddr
= in6_addmulti(addr
, ifp
, errorp
);
1655 if (!imm
->i6mm_maddr
) {
1656 /* *errorp is alrady set */
1657 kfree(imm
, M_IPMADDR
);
1664 in6_leavegroup(struct in6_multi_mship
*imm
)
1667 if (imm
->i6mm_maddr
)
1668 in6_delmulti(imm
->i6mm_maddr
);
1669 kfree(imm
, M_IPMADDR
);
1674 * Add an address to the list of IP6 multicast addresses for a
1678 in6_addmulti(struct in6_addr
*maddr6
, struct ifnet
*ifp
, int *errorp
)
1680 struct in6_multi
*in6m
;
1681 struct sockaddr_in6 sin6
;
1682 struct ifmultiaddr
*ifma
;
1689 * Call generic routine to add membership or increment
1690 * refcount. It wants addresses in the form of a sockaddr,
1691 * so we build one here (being careful to zero the unused bytes).
1693 bzero(&sin6
, sizeof sin6
);
1694 sin6
.sin6_family
= AF_INET6
;
1695 sin6
.sin6_len
= sizeof sin6
;
1696 sin6
.sin6_addr
= *maddr6
;
1697 *errorp
= if_addmulti(ifp
, (struct sockaddr
*)&sin6
, &ifma
);
1704 * If ifma->ifma_protospec is null, then if_addmulti() created
1705 * a new record. Otherwise, we are done.
1707 if (ifma
->ifma_protospec
!= NULL
) {
1709 return ifma
->ifma_protospec
;
1712 in6m
= kmalloc(sizeof(*in6m
), M_IPMADDR
, M_INTWAIT
| M_ZERO
);
1713 in6m
->in6m_addr
= *maddr6
;
1714 in6m
->in6m_ifp
= ifp
;
1715 in6m
->in6m_ifma
= ifma
;
1716 ifma
->ifma_protospec
= in6m
;
1717 LIST_INSERT_HEAD(&in6_multihead
, in6m
, in6m_entry
);
1720 * Let MLD6 know that we have joined a new IP6 multicast
1723 mld6_start_listening(in6m
);
1729 * Delete a multicast address record.
1732 in6_delmulti(struct in6_multi
*in6m
)
1734 struct ifmultiaddr
*ifma
= in6m
->in6m_ifma
;
1738 if (ifma
->ifma_refcount
== 1) {
1740 * No remaining claims to this record; let MLD6 know
1741 * that we are leaving the multicast group.
1743 mld6_stop_listening(in6m
);
1744 ifma
->ifma_protospec
= NULL
;
1745 LIST_REMOVE(in6m
, in6m_entry
);
1746 kfree(in6m
, M_IPMADDR
);
1748 /* XXX - should be separate API for when we have an ifma? */
1749 if_delmulti(ifma
->ifma_ifp
, ifma
->ifma_addr
);
1754 * Find an IPv6 interface link-local address specific to an interface.
1757 in6ifa_ifpforlinklocal(struct ifnet
*ifp
, int ignoreflags
)
1759 const struct ifaddr_container
*ifac
;
1761 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1762 struct ifaddr
*ifa
= ifac
->ifa
;
1764 if (ifa
->ifa_addr
== NULL
)
1765 continue; /* just for safety */
1766 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1768 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa
))) {
1769 if ((((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1772 return (struct in6_ifaddr
*)ifa
;
1780 * find the internet address corresponding to a given interface and address.
1783 in6ifa_ifpwithaddr(struct ifnet
*ifp
, struct in6_addr
*addr
)
1785 const struct ifaddr_container
*ifac
;
1787 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1788 struct ifaddr
*ifa
= ifac
->ifa
;
1790 if (ifa
->ifa_addr
== NULL
)
1791 continue; /* just for safety */
1792 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1794 if (IN6_ARE_ADDR_EQUAL(addr
, IFA_IN6(ifa
)))
1795 return (struct in6_ifaddr
*)ifa
;
1801 * Find a link-local scoped address on ifp and return it if any.
1804 in6ifa_llaonifp(struct ifnet
*ifp
)
1806 const struct ifaddr_container
*ifac
;
1808 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1809 const struct sockaddr_in6
*sin6
;
1810 struct ifaddr
*ifa
= ifac
->ifa
;
1812 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1814 sin6
= (const struct sockaddr_in6
*)ifa
->ifa_addr
;
1815 if (IN6_IS_SCOPE_LINKLOCAL(&sin6
->sin6_addr
) ||
1816 /* XXX why are mcast addresses ifp address list? */
1817 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6
->sin6_addr
) ||
1818 IN6_IS_ADDR_MC_NODELOCAL(&sin6
->sin6_addr
))
1819 return (struct in6_ifaddr
*)ifa
;
1825 * find the internet address on a given interface corresponding to a neighbor's
1829 in6ifa_ifplocaladdr(const struct ifnet
*ifp
, const struct in6_addr
*addr
)
1832 struct in6_ifaddr
*ia
;
1833 struct ifaddr_container
*ifac
;
1835 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1838 if (ifa
->ifa_addr
== NULL
)
1839 continue; /* just for safety */
1840 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1842 ia
= (struct in6_ifaddr
*)ifa
;
1843 if (IN6_ARE_MASKED_ADDR_EQUAL(addr
,
1844 &ia
->ia_addr
.sin6_addr
,
1845 &ia
->ia_prefixmask
.sin6_addr
))
1853 * Convert IP6 address to printable (loggable) representation.
1855 static char digits
[] = "0123456789abcdef";
1856 static int ip6round
= 0;
1858 ip6_sprintf(const struct in6_addr
*addr
)
1860 static char ip6buf
[8][48];
1863 const u_short
*a
= (const u_short
*)addr
;
1867 ip6round
= (ip6round
+ 1) & 7;
1868 cp
= ip6buf
[ip6round
];
1870 for (i
= 0; i
< 8; i
++) {
1881 if (dcolon
== 0 && *(a
+ 1) == 0) {
1893 d
= (const u_char
*)a
;
1894 *cp
++ = digits
[*d
>> 4];
1895 *cp
++ = digits
[*d
++ & 0xf];
1896 *cp
++ = digits
[*d
>> 4];
1897 *cp
++ = digits
[*d
& 0xf];
1902 return (ip6buf
[ip6round
]);
1906 in6_localaddr(struct in6_addr
*in6
)
1908 struct in6_ifaddr
*ia
;
1910 if (IN6_IS_ADDR_LOOPBACK(in6
) || IN6_IS_ADDR_LINKLOCAL(in6
))
1913 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
)
1914 if (IN6_ARE_MASKED_ADDR_EQUAL(in6
, &ia
->ia_addr
.sin6_addr
,
1915 &ia
->ia_prefixmask
.sin6_addr
))
1922 in6_is_addr_deprecated(struct sockaddr_in6
*sa6
)
1924 struct in6_ifaddr
*ia
;
1926 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
1927 if (IN6_ARE_ADDR_EQUAL(&ia
->ia_addr
.sin6_addr
,
1929 (ia
->ia6_flags
& IN6_IFF_DEPRECATED
))
1930 return (1); /* true */
1932 /* XXX: do we still have to go thru the rest of the list? */
1935 return (0); /* false */
1939 * return length of part which dst and src are equal
1943 in6_matchlen(struct in6_addr
*src
, struct in6_addr
*dst
)
1946 u_char
*s
= (u_char
*)src
, *d
= (u_char
*)dst
;
1947 u_char
*lim
= s
+ 16, r
;
1950 if ((r
= (*d
++ ^ *s
++)) != 0) {
1961 /* XXX: to be scope conscious */
1963 in6_are_prefix_equal(struct in6_addr
*p1
, struct in6_addr
*p2
, int len
)
1965 int bytelen
, bitlen
;
1968 if (0 > len
|| len
> 128) {
1969 log(LOG_ERR
, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1977 if (bcmp(&p1
->s6_addr
, &p2
->s6_addr
, bytelen
))
1979 if (p1
->s6_addr
[bytelen
] >> (8 - bitlen
) !=
1980 p2
->s6_addr
[bytelen
] >> (8 - bitlen
))
1987 in6_prefixlen2mask(struct in6_addr
*maskp
, int len
)
1989 u_char maskarray
[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1990 int bytelen
, bitlen
, i
;
1993 if (0 > len
|| len
> 128) {
1994 log(LOG_ERR
, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1999 bzero(maskp
, sizeof(*maskp
));
2002 for (i
= 0; i
< bytelen
; i
++)
2003 maskp
->s6_addr
[i
] = 0xff;
2005 maskp
->s6_addr
[bytelen
] = maskarray
[bitlen
- 1];
2009 * return the best address out of the same scope
2012 in6_ifawithscope(struct ifnet
*oifp
, struct in6_addr
*dst
, struct ucred
*cred
)
2014 int dst_scope
= in6_addrscope(dst
), src_scope
, best_scope
= 0;
2016 struct in6_ifaddr
*ifa_best
= NULL
;
2017 u_int32_t dstzone
, odstzone
;
2019 const struct ifnet_array
*arr
;
2022 if(cred
&& cred
->cr_prison
)
2028 if (in6_addr2zoneid(oifp
, dst
, &odstzone
))
2032 * We search for all addresses on all interfaces from the beginning.
2033 * Comparing an interface with the outgoing interface will be done
2034 * only at the final stage of tiebreaking.
2036 arr
= ifnet_array_get();
2037 for (i
= 0; i
< arr
->ifnet_count
; ++i
) {
2038 struct ifnet
*ifp
= arr
->ifnet_arr
[i
];
2039 struct ifaddr_container
*ifac
;
2042 * We can never take an address that breaks the scope zone
2043 * of the destination.
2045 if (ifp
->if_afdata
[AF_INET6
] == NULL
)
2047 if (in6_addr2zoneid(ifp
, dst
, &dstzone
) || dstzone
!= odstzone
)
2050 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2051 int tlen
= -1, dscopecmp
, bscopecmp
, matchcmp
;
2052 struct ifaddr
*ifa
= ifac
->ifa
;
2054 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2057 src_scope
= in6_addrscope(IFA_IN6(ifa
));
2060 * Don't use an address before completing DAD
2061 * nor a duplicated address.
2063 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2067 /* XXX: is there any case to allow anycasts? */
2068 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2072 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2076 /* Skip adresses not valid for current jail */
2078 !(jailed_ip(cred
->cr_prison
, (struct sockaddr
*)(ifa
->ifa_addr
)) != 0))
2082 * If this is the first address we find,
2085 if (ifa_best
== NULL
)
2089 * ifa_best is never NULL beyond this line except
2090 * within the block labeled "replace".
2094 * If ifa_best has a smaller scope than dst and
2095 * the current address has a larger one than
2096 * (or equal to) dst, always replace ifa_best.
2097 * Also, if the current address has a smaller scope
2098 * than dst, ignore it unless ifa_best also has a
2100 * Consequently, after the two if-clause below,
2101 * the followings must be satisfied:
2102 * (scope(src) < scope(dst) &&
2103 * scope(best) < scope(dst))
2105 * (scope(best) >= scope(dst) &&
2106 * scope(src) >= scope(dst))
2108 if (IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) < 0 &&
2109 IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) >= 0)
2110 goto replace
; /* (A) */
2111 if (IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) < 0 &&
2112 IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) >= 0)
2116 * A deprecated address SHOULD NOT be used in new
2117 * communications if an alternate (non-deprecated)
2118 * address is available and has sufficient scope.
2119 * RFC 2462, Section 5.5.4.
2121 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2122 IN6_IFF_DEPRECATED
) {
2124 * Ignore any deprecated addresses if
2125 * specified by configuration.
2127 if (!ip6_use_deprecated
)
2131 * If we have already found a non-deprecated
2132 * candidate, just ignore deprecated addresses.
2134 if (!(ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
))
2139 * A non-deprecated address is always preferred
2140 * to a deprecated one regardless of scopes and
2141 * address matching (Note invariants ensured by the
2142 * conditions (A) and (B) above.)
2144 if ((ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
) &&
2145 !(((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2146 IN6_IFF_DEPRECATED
))
2150 * When we use temporary addresses described in
2151 * RFC 3041, we prefer temporary addresses to
2152 * public autoconf addresses. Again, note the
2153 * invariants from (A) and (B). Also note that we
2154 * don't have any preference between static addresses
2155 * and autoconf addresses (despite of whether or not
2156 * the latter is temporary or public.)
2158 if (ip6_use_tempaddr
) {
2159 struct in6_ifaddr
*ifat
;
2161 ifat
= (struct in6_ifaddr
*)ifa
;
2162 if ((ifa_best
->ia6_flags
&
2163 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2164 == IN6_IFF_AUTOCONF
&&
2166 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2167 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
)) {
2170 if ((ifa_best
->ia6_flags
&
2171 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2172 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
) &&
2174 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2175 == IN6_IFF_AUTOCONF
) {
2181 * At this point, we have two cases:
2182 * 1. we are looking at a non-deprecated address,
2183 * and ifa_best is also non-deprecated.
2184 * 2. we are looking at a deprecated address,
2185 * and ifa_best is also deprecated.
2186 * Also, we do not have to consider a case where
2187 * the scope of if_best is larger(smaller) than dst and
2188 * the scope of the current address is smaller(larger)
2189 * than dst. Such a case has already been covered.
2190 * Tiebreaking is done according to the following
2192 * - the scope comparison between the address and
2194 * - the scope comparison between the address and
2195 * ifa_best (bscopecmp)
2196 * - if the address match dst longer than ifa_best
2198 * - if the address is on the outgoing I/F (outI/F)
2200 * Roughly speaking, the selection policy is
2201 * - the most important item is scope. The same scope
2202 * is best. Then search for a larger scope.
2203 * Smaller scopes are the last resort.
2204 * - A deprecated address is chosen only when we have
2205 * no address that has an enough scope, but is
2206 * prefered to any addresses of smaller scopes
2207 * (this must be already done above.)
2208 * - addresses on the outgoing I/F are preferred to
2209 * ones on other interfaces if none of above
2210 * tiebreaks. In the table below, the column "bI"
2211 * means if the best_ifa is on the outgoing
2212 * interface, and the column "sI" means if the ifa
2213 * is on the outgoing interface.
2214 * - If there is no other reasons to choose one,
2215 * longest address match against dst is considered.
2217 * The precise decision table is as follows:
2218 * dscopecmp bscopecmp match bI oI | replace?
2219 * N/A equal N/A Y N | No (1)
2220 * N/A equal N/A N Y | Yes (2)
2221 * N/A equal larger N/A | Yes (3)
2222 * N/A equal !larger N/A | No (4)
2223 * larger larger N/A N/A | No (5)
2224 * larger smaller N/A N/A | Yes (6)
2225 * smaller larger N/A N/A | Yes (7)
2226 * smaller smaller N/A N/A | No (8)
2227 * equal smaller N/A N/A | Yes (9)
2228 * equal larger (already done at A above)
2230 dscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
);
2231 bscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, best_scope
);
2233 if (bscopecmp
== 0) {
2234 struct ifnet
*bifp
= ifa_best
->ia_ifp
;
2236 if (bifp
== oifp
&& ifp
!= oifp
) /* (1) */
2238 if (bifp
!= oifp
&& ifp
== oifp
) /* (2) */
2242 * Both bifp and ifp are on the outgoing
2243 * interface, or both two are on a different
2244 * interface from the outgoing I/F.
2245 * now we need address matching against dst
2248 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2249 matchcmp
= tlen
- blen
;
2250 if (matchcmp
> 0) /* (3) */
2254 if (dscopecmp
> 0) {
2255 if (bscopecmp
> 0) /* (5) */
2257 goto replace
; /* (6) */
2259 if (dscopecmp
< 0) {
2260 if (bscopecmp
> 0) /* (7) */
2265 /* now dscopecmp must be 0 */
2267 goto replace
; /* (9) */
2270 ifa_best
= (struct in6_ifaddr
*)ifa
;
2271 blen
= tlen
>= 0 ? tlen
:
2272 in6_matchlen(IFA_IN6(ifa
), dst
);
2273 best_scope
= in6_addrscope(&ifa_best
->ia_addr
.sin6_addr
);
2277 /* count statistics for future improvements */
2278 if (ifa_best
== NULL
)
2279 ip6stat
.ip6s_sources_none
++;
2281 if (oifp
== ifa_best
->ia_ifp
)
2282 ip6stat
.ip6s_sources_sameif
[best_scope
]++;
2284 ip6stat
.ip6s_sources_otherif
[best_scope
]++;
2286 if (best_scope
== dst_scope
)
2287 ip6stat
.ip6s_sources_samescope
[best_scope
]++;
2289 ip6stat
.ip6s_sources_otherscope
[best_scope
]++;
2291 if (ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
)
2292 ip6stat
.ip6s_sources_deprecated
[best_scope
]++;
2299 * return the best address out of the same scope. if no address was
2300 * found, return the first valid address from designated IF.
2303 in6_ifawithifp(struct ifnet
*ifp
, struct in6_addr
*dst
)
2305 int dst_scope
= in6_addrscope(dst
), blen
= -1, tlen
;
2306 struct ifaddr_container
*ifac
;
2307 struct in6_ifaddr
*besta
= NULL
;
2308 struct in6_ifaddr
*dep
[2]; /* last-resort: deprecated */
2310 dep
[0] = dep
[1] = NULL
;
2313 * We first look for addresses in the same scope.
2314 * If there is one, return it.
2315 * If two or more, return one which matches the dst longest.
2316 * If none, return one of global addresses assigned other ifs.
2318 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2319 struct ifaddr
*ifa
= ifac
->ifa
;
2321 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2323 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2324 continue; /* XXX: is there any case to allow anycast? */
2325 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2326 continue; /* don't use this interface */
2327 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2329 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2330 if (ip6_use_deprecated
)
2331 dep
[0] = (struct in6_ifaddr
*)ifa
;
2335 if (dst_scope
== in6_addrscope(IFA_IN6(ifa
))) {
2337 * call in6_matchlen() as few as possible
2341 blen
= in6_matchlen(&besta
->ia_addr
.sin6_addr
, dst
);
2342 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2345 besta
= (struct in6_ifaddr
*)ifa
;
2348 besta
= (struct in6_ifaddr
*)ifa
;
2354 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2355 struct ifaddr
*ifa
= ifac
->ifa
;
2357 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2359 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2360 continue; /* XXX: is there any case to allow anycast? */
2361 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2362 continue; /* don't use this interface */
2363 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2365 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2366 if (ip6_use_deprecated
)
2367 dep
[1] = (struct in6_ifaddr
*)ifa
;
2371 return (struct in6_ifaddr
*)ifa
;
2374 /* use the last-resort values, that are, deprecated addresses */
2384 * perform DAD when interface becomes IFF_UP.
2387 in6_if_up_dispatch(netmsg_t nmsg
)
2389 struct ifnet
*ifp
= nmsg
->lmsg
.u
.ms_resultp
;
2390 struct ifaddr_container
*ifac
;
2391 struct in6_ifaddr
*ia
;
2392 int dad_delay
; /* delay ticks before DAD output */
2397 * special cases, like 6to4, are handled in in6_ifattach
2399 in6_ifattach(ifp
, NULL
);
2402 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2403 struct ifaddr
*ifa
= ifac
->ifa
;
2405 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2407 ia
= (struct in6_ifaddr
*)ifa
;
2408 if (ia
->ia6_flags
& IN6_IFF_TENTATIVE
)
2409 nd6_dad_start(ifa
, &dad_delay
);
2412 netisr_replymsg(&nmsg
->base
, 0);
2416 in6_if_up(struct ifnet
*ifp
)
2418 struct netmsg_base nmsg
;
2420 netmsg_init(&nmsg
, NULL
, &curthread
->td_msgport
, 0, in6_if_up_dispatch
);
2421 nmsg
.lmsg
.u
.ms_resultp
= ifp
;
2422 netisr_domsg(&nmsg
, 0);
2426 in6if_do_dad(struct ifnet
*ifp
)
2428 if (ifp
->if_flags
& IFF_LOOPBACK
)
2431 switch (ifp
->if_type
) {
2438 * Our DAD routine requires the interface up and running.
2439 * However, some interfaces can be up before the RUNNING
2440 * status. Additionaly, users may try to assign addresses
2441 * before the interface becomes up (or running).
2442 * We simply skip DAD in such a case as a work around.
2443 * XXX: we should rather mark "tentative" on such addresses,
2444 * and do DAD after the interface becomes ready.
2446 if ((ifp
->if_flags
& (IFF_UP
|IFF_RUNNING
)) !=
2447 (IFF_UP
|IFF_RUNNING
))
2455 * Calculate max IPv6 MTU through all the interfaces and store it
2461 unsigned long maxmtu
= 0;
2462 const struct ifnet_array
*arr
;
2467 arr
= ifnet_array_get();
2468 for (i
= 0; i
< arr
->ifnet_count
; ++i
) {
2469 struct ifnet
*ifp
= arr
->ifnet_arr
[i
];
2471 /* this function can be called during ifnet initialization */
2472 if (ifp
->if_afdata
[AF_INET6
] == NULL
)
2474 if ((ifp
->if_flags
& IFF_LOOPBACK
) == 0 &&
2475 IN6_LINKMTU(ifp
) > maxmtu
)
2476 maxmtu
= IN6_LINKMTU(ifp
);
2478 if (maxmtu
) /* update only when maxmtu is positive */
2479 in6_maxmtu
= maxmtu
;
2483 in6_domifattach(struct ifnet
*ifp
)
2485 struct in6_ifextra
*ext
;
2487 ext
= (struct in6_ifextra
*)kmalloc(sizeof(*ext
), M_IFADDR
, M_WAITOK
);
2488 bzero(ext
, sizeof(*ext
));
2490 ext
->in6_ifstat
= (struct in6_ifstat
*)kmalloc(sizeof(struct in6_ifstat
),
2491 M_IFADDR
, M_WAITOK
);
2492 bzero(ext
->in6_ifstat
, sizeof(*ext
->in6_ifstat
));
2495 (struct icmp6_ifstat
*)kmalloc(sizeof(struct icmp6_ifstat
),
2496 M_IFADDR
, M_WAITOK
);
2497 bzero(ext
->icmp6_ifstat
, sizeof(*ext
->icmp6_ifstat
));
2499 ext
->nd_ifinfo
= nd6_ifattach(ifp
);
2500 ext
->scope6_id
= scope6_ifattach(ifp
);
2505 in6_domifdetach(struct ifnet
*ifp
, void *aux
)
2507 struct in6_ifextra
*ext
= (struct in6_ifextra
*)aux
;
2508 scope6_ifdetach(ext
->scope6_id
);
2509 nd6_ifdetach(ext
->nd_ifinfo
);
2510 kfree(ext
->in6_ifstat
, M_IFADDR
);
2511 kfree(ext
->icmp6_ifstat
, M_IFADDR
);
2512 kfree(ext
, M_IFADDR
);