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
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
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)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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
,
150 void (*callback
)(int, int, struct rt_addrinfo
*, struct rtentry
*, void *))
152 struct sockaddr_in6 all1_sa
;
153 struct rt_addrinfo rtinfo
;
156 bzero(&all1_sa
, sizeof(all1_sa
));
157 all1_sa
.sin6_family
= AF_INET6
;
158 all1_sa
.sin6_len
= sizeof(struct sockaddr_in6
);
159 all1_sa
.sin6_addr
= in6mask128
;
162 * We specify the address itself as the gateway, and set the
163 * RTF_LLINFO flag, so that the corresponding host route would have
164 * the flag, and thus applications that assume traditional behavior
165 * would be happy. Note that we assume the caller of the function
166 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
167 * which changes the outgoing interface to the loopback interface.
169 bzero(&rtinfo
, sizeof(struct rt_addrinfo
));
170 rtinfo
.rti_info
[RTAX_DST
] = ifa
->ifa_addr
;
171 rtinfo
.rti_info
[RTAX_GATEWAY
] = ifa
->ifa_addr
;
172 rtinfo
.rti_info
[RTAX_NETMASK
] = (struct sockaddr
*)&all1_sa
;
173 rtinfo
.rti_flags
= RTF_UP
|RTF_HOST
|RTF_LLINFO
;
175 error
= rtrequest1_global(cmd
, &rtinfo
, 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" : cmd
== RTM_DELETE
? "DELETE" : "GET",
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 * unless the address is marked as tentative, where it will be reported
212 * once DAD completes.
213 * XXX: since we called rtinit for a p2p interface with a destination,
214 * we end up reporting twice in such a case. Should we rather
215 * omit the second report?
219 struct in6_ifaddr
*ia6
= (struct in6_ifaddr
*)ifa
;
221 if (cmd
!= RTM_ADD
||
222 !(ia6
->ia6_flags
& IN6_IFF_TENTATIVE
))
223 rt_newaddrmsg(cmd
, ifa
, error
, rt
);
225 if (cmd
== RTM_DELETE
) {
226 if (rt
->rt_refcnt
== 0) {
233 /* no way to return any new error */
238 in6_newaddrmsg_callback(int cmd
, int error
, struct rt_addrinfo
*rtinfo
,
239 struct rtentry
*rt
, void *arg
)
241 struct ifaddr
*ifa
= arg
;
243 if (error
== 0 && rt
!= NULL
&& mycpuid
== 0)
244 rt_newaddrmsg(RTM_ADD
, ifa
, error
, rt
);
248 in6_newaddrmsg(struct ifaddr
*ifa
)
250 in6_ifloop_request(RTM_GET
, ifa
, in6_newaddrmsg_callback
);
254 * Add ownaddr as loopback rtentry. We previously add the route only if
255 * necessary (ex. on a p2p link). However, since we now manage addresses
256 * separately from prefixes, we should always add the route. We can't
257 * rely on the cloning mechanism from the corresponding interface route
261 in6_ifaddloop(struct ifaddr
*ifa
)
265 /* If there is no loopback entry, allocate one. */
266 rt
= rtpurelookup(ifa
->ifa_addr
);
267 if (rt
== NULL
|| !(rt
->rt_flags
& RTF_HOST
) ||
268 !(rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
))
269 in6_ifloop_request(RTM_ADD
, ifa
, in6_ifloop_request_callback
);
275 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
279 in6_ifremloop(struct ifaddr
*ifa
)
281 struct in6_ifaddr
*ia
;
286 * Some of BSD variants do not remove cloned routes
287 * from an interface direct route, when removing the direct route
288 * (see comments in net/net_osdep.h). Even for variants that do remove
289 * cloned routes, they could fail to remove the cloned routes when
290 * we handle multple addresses that share a common prefix.
291 * So, we should remove the route corresponding to the deleted address
292 * regardless of the result of in6_is_ifloop_auto().
296 * Delete the entry only if exact one ifa exists. More than one ifa
297 * can exist if we assign a same single address to multiple
298 * (probably p2p) interfaces.
299 * XXX: we should avoid such a configuration in IPv6...
301 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
302 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa
), &ia
->ia_addr
.sin6_addr
)) {
311 * Before deleting, check if a corresponding loopbacked host
312 * route surely exists. With this check, we can avoid to
313 * delete an interface direct route whose destination is same
314 * as the address being removed. This can happen when remofing
315 * a subnet-router anycast address on an interface attahced
316 * to a shared medium.
318 rt
= rtpurelookup(ifa
->ifa_addr
);
319 if (rt
!= NULL
&& (rt
->rt_flags
& RTF_HOST
) &&
320 (rt
->rt_ifp
->if_flags
& IFF_LOOPBACK
)) {
322 in6_ifloop_request(RTM_DELETE
, ifa
,
323 in6_ifloop_request_callback
);
329 in6_mask2len(const struct in6_addr
*mask
, const u_char
*lim0
)
332 const u_char
*lim
= lim0
, *p
;
335 lim0
- (const u_char
*)mask
> sizeof(*mask
)) {
336 /* Ignore the scope_id part */
337 lim
= (const u_char
*)mask
+ sizeof(*mask
);
339 for (p
= (const u_char
*)mask
; p
< lim
; x
++, p
++) {
345 for (y
= 0; y
< 8; y
++) {
346 if ((*p
& (0x80 >> y
)) == 0)
352 * When the limit pointer is given, do a stricter check on the
356 if (y
!= 0 && (*p
& (0x00ff >> y
)) != 0)
358 for (p
= p
+ 1; p
< lim
; p
++)
366 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
367 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
370 in6_control_dispatch(netmsg_t msg
)
374 error
= in6_control(msg
->control
.nm_cmd
,
375 msg
->control
.nm_data
,
378 lwkt_replymsg(&msg
->control
.base
.lmsg
, error
);
382 in6_control(u_long cmd
, caddr_t data
, struct ifnet
*ifp
, struct thread
*td
)
384 struct netmsg_pru_control msg
;
387 case SIOCSIFPREFIX_IN6
:
388 case SIOCDIFPREFIX_IN6
:
389 case SIOCAIFPREFIX_IN6
:
390 case SIOCCIFPREFIX_IN6
:
391 case SIOCSGIFPREFIX_IN6
:
392 case SIOCGIFPREFIX_IN6
:
393 log(LOG_NOTICE
, "prefix ioctls are now invalidated. "
394 "please use ifconfig.\n");
397 case SIOCSIFADDR_IN6
:
398 case SIOCSIFDSTADDR_IN6
:
399 case SIOCSIFNETMASK_IN6
:
401 * Since IPv6 allows a node to assign multiple addresses
402 * on a single interface, SIOCSIFxxx ioctls are not suitable
403 * and should be unused.
405 /* We decided to obsolete this command (20000704) */
413 * Do not pass those ioctl to driver handler since they are not
414 * properly setup. Instead just error out.
419 case SIOCGETSGCNT_IN6
:
420 case SIOCGETMIFCNT_IN6
:
422 case SIOCAADDRCTL_POLICY
:
423 case SIOCDADDRCTL_POLICY
:
425 case SIOCSNDFLUSH_IN6
:
426 case SIOCSPFXFLUSH_IN6
:
427 case SIOCSRTRFLUSH_IN6
:
428 case SIOCSDEFIFACE_IN6
:
429 case SIOCSIFINFO_FLAGS
:
430 case SIOCSIFINFO_IN6
:
431 case OSIOCGIFINFO_IN6
:
432 case SIOCGIFINFO_IN6
:
435 case SIOCGNBRINFO_IN6
:
436 case SIOCGDEFIFACE_IN6
:
444 case SIOCSIFALIFETIME_IN6
:
445 case SIOCAIFADDR_IN6
:
446 case SIOCDIFADDR_IN6
:
448 * Dispatch these SIOCs to netisr0.
450 netmsg_init(&msg
.base
, NULL
, &curthread
->td_msgport
, 0,
451 in6_control_internal_dispatch
);
456 lwkt_domsg(netisr_cpuport(0), &msg
.base
.lmsg
, 0);
457 return msg
.base
.lmsg
.ms_error
;
460 return in6_control_internal(cmd
, data
, ifp
, td
);
465 in6_control_internal_dispatch(netmsg_t msg
)
469 error
= in6_control_internal(msg
->control
.nm_cmd
, msg
->control
.nm_data
,
470 msg
->control
.nm_ifp
, msg
->control
.nm_td
);
471 lwkt_replymsg(&msg
->lmsg
, error
);
475 in6_control_internal(u_long cmd
, caddr_t data
, struct ifnet
*ifp
,
478 struct in6_ifreq
*ifr
= (struct in6_ifreq
*)data
;
479 struct in6_ifaddr
*ia
= NULL
;
480 struct in6_aliasreq
*ifra
= (struct in6_aliasreq
*)data
;
481 struct in6_ifextra
*xtra
;
482 boolean_t privileged
;
486 if (caps_priv_check_td(td
, SYSCAP_RESTRICTEDROOT
) == 0)
498 return in6_lifaddr_ioctl(cmd
, data
, ifp
, td
);
502 case SIOCGETSGCNT_IN6
:
503 case SIOCGETMIFCNT_IN6
:
504 return (mrt6_ioctl(cmd
, data
));
508 case SIOCAADDRCTL_POLICY
:
509 case SIOCDADDRCTL_POLICY
:
512 return (in6_src_ioctl(cmd
, data
));
519 case SIOCSNDFLUSH_IN6
:
520 case SIOCSPFXFLUSH_IN6
:
521 case SIOCSRTRFLUSH_IN6
:
522 case SIOCSDEFIFACE_IN6
:
523 case SIOCSIFINFO_FLAGS
:
524 case SIOCSIFINFO_IN6
:
528 case OSIOCGIFINFO_IN6
:
529 case SIOCGIFINFO_IN6
:
532 case SIOCGNBRINFO_IN6
:
533 case SIOCGDEFIFACE_IN6
:
534 return (nd6_ioctl(cmd
, data
, ifp
));
541 return (scope6_set(ifp
,
542 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
545 return (scope6_get(ifp
,
546 (struct scope6_id
*)ifr
->ifr_ifru
.ifru_scope_id
));
549 return (scope6_get_default((struct scope6_id
*)
550 ifr
->ifr_ifru
.ifru_scope_id
));
554 * Find address for this interface, if it exists.
556 if (ifra
->ifra_addr
.sin6_family
== AF_INET6
) { /* XXX */
557 struct sockaddr_in6
*sa6
=
558 (struct sockaddr_in6
*)&ifra
->ifra_addr
;
560 if (IN6_IS_ADDR_LINKLOCAL(&sa6
->sin6_addr
)) {
561 if (sa6
->sin6_addr
.s6_addr16
[1] == 0) {
562 /* Link ID is not embedded by the user */
563 sa6
->sin6_addr
.s6_addr16
[1] =
564 htons(ifp
->if_index
);
565 } else if (sa6
->sin6_addr
.s6_addr16
[1] !=
566 htons(ifp
->if_index
)) {
567 /* Link ID contradicts */
570 if (sa6
->sin6_scope_id
) {
571 if (sa6
->sin6_scope_id
!=
572 (u_int32_t
)ifp
->if_index
)
574 sa6
->sin6_scope_id
= 0; /* XXX: good way? */
577 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
581 case SIOCDIFADDR_IN6
:
583 * For IPv4, we look for existing in_ifaddr here to allow
584 * "ifconfig if0 delete" to remove first IPv4 address on the
585 * interface. For IPv6, as the spec allow multiple interface
586 * address from the day one, we consider "remove the first one"
587 * semantics to be not preferable.
590 return (EADDRNOTAVAIL
);
592 case SIOCAIFADDR_IN6
:
594 * We always require users to specify a valid IPv6 address for
595 * the corresponding operation.
597 if (ifra
->ifra_addr
.sin6_family
!= AF_INET6
||
598 ifra
->ifra_addr
.sin6_len
!= sizeof(struct sockaddr_in6
))
599 return (EAFNOSUPPORT
);
604 case SIOCGIFADDR_IN6
:
605 /* This interface is basically deprecated. Use SIOCGIFCONF. */
607 case SIOCGIFAFLAG_IN6
:
608 case SIOCGIFNETMASK_IN6
:
609 case SIOCGIFDSTADDR_IN6
:
610 case SIOCGIFALIFETIME_IN6
:
611 /* Must think again about its semantics */
613 return (EADDRNOTAVAIL
);
616 case SIOCSIFALIFETIME_IN6
:
618 const struct in6_addrlifetime
*lt
;
623 return (EADDRNOTAVAIL
);
624 /* Sanity for overflow - beware unsigned */
625 lt
= &ifr
->ifr_ifru
.ifru_lifetime
;
626 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
&&
627 lt
->ia6t_vltime
+ time_uptime
< time_uptime
)
629 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
&&
630 lt
->ia6t_pltime
+ time_uptime
< time_uptime
)
637 case SIOCGIFADDR_IN6
:
638 ifr
->ifr_addr
= ia
->ia_addr
;
641 case SIOCGIFDSTADDR_IN6
:
642 if (!(ifp
->if_flags
& IFF_POINTOPOINT
))
645 * XXX: Should we check if ifa_dstaddr is NULL and return
648 ifr
->ifr_dstaddr
= ia
->ia_dstaddr
;
651 case SIOCGIFNETMASK_IN6
:
652 ifr
->ifr_addr
= ia
->ia_prefixmask
;
655 case SIOCGIFAFLAG_IN6
:
656 ifr
->ifr_ifru
.ifru_flags6
= ia
->ia6_flags
;
659 case SIOCGIFSTAT_IN6
:
660 if ((xtra
= ifp
->if_afdata
[AF_INET6
]) == NULL
)
662 bzero(&ifr
->ifr_ifru
.ifru_stat
,
663 sizeof(ifr
->ifr_ifru
.ifru_stat
));
664 ifr
->ifr_ifru
.ifru_stat
= *xtra
->in6_ifstat
;
667 case SIOCGIFSTAT_ICMP6
:
668 if ((xtra
= ifp
->if_afdata
[AF_INET6
]) == NULL
)
670 bzero(&ifr
->ifr_ifru
.ifru_stat
,
671 sizeof(ifr
->ifr_ifru
.ifru_icmp6stat
));
672 ifr
->ifr_ifru
.ifru_icmp6stat
= *xtra
->icmp6_ifstat
;
675 case SIOCGIFALIFETIME_IN6
:
676 ifr
->ifr_ifru
.ifru_lifetime
= ia
->ia6_lifetime
;
679 case SIOCSIFALIFETIME_IN6
:
680 ia
->ia6_lifetime
= ifr
->ifr_ifru
.ifru_lifetime
;
681 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
682 ia
->ia6_lifetime
.ia6t_expire
=
683 time_uptime
+ ia
->ia6_lifetime
.ia6t_vltime
;
685 ia
->ia6_lifetime
.ia6t_expire
= 0;
687 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
688 ia
->ia6_lifetime
.ia6t_preferred
=
689 time_uptime
+ ia
->ia6_lifetime
.ia6t_pltime
;
691 ia
->ia6_lifetime
.ia6t_preferred
= 0;
695 case SIOCAIFADDR_IN6
:
697 int i
, error
= 0, iaIsNew
;
698 struct nd_prefix pr0
, *pr
;
706 * First, make or update the interface address structure,
707 * and link it to the list.
709 if ((error
= in6_update_ifa(ifp
, ifra
, ia
)) != 0)
713 * Then, make the prefix on-link on the interface.
714 * XXX: We'd rather create the prefix before the address, but
715 * we need at least one address to install the corresponding
716 * interface route, so we configure the address first.
720 * Convert mask to prefix length (prefixmask has already
721 * been validated in in6_update_ifa().
723 bzero(&pr0
, sizeof(pr0
));
725 pr0
.ndpr_plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
727 if (pr0
.ndpr_plen
== 128)
728 break; /* no need to install a host route. */
729 pr0
.ndpr_prefix
= ifra
->ifra_addr
;
730 pr0
.ndpr_mask
= ifra
->ifra_prefixmask
.sin6_addr
;
731 /* Apply the mask for safety. */
732 for (i
= 0; i
< 4; i
++) {
733 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
734 ifra
->ifra_prefixmask
.sin6_addr
.s6_addr32
[i
];
737 * XXX: Since we don't have an API to set prefix (not address)
738 * lifetimes, we just use the same lifetimes as addresses.
739 * The (temporarily) installed lifetimes can be overridden by
740 * later advertised RAs (when accept_rtadv is non 0), which is
741 * an intended behavior.
743 pr0
.ndpr_raf_onlink
= 1; /* should be configurable? */
745 ((ifra
->ifra_flags
& IN6_IFF_AUTOCONF
) != 0);
746 pr0
.ndpr_vltime
= ifra
->ifra_lifetime
.ia6t_vltime
;
747 pr0
.ndpr_pltime
= ifra
->ifra_lifetime
.ia6t_pltime
;
749 /* Add the prefix if there's one. */
750 if ((pr
= nd6_prefix_lookup(&pr0
)) == NULL
) {
752 * nd6_prelist_add will install the corresponding
755 if ((error
= nd6_prelist_add(&pr0
, NULL
, &pr
)) != 0)
758 log(LOG_ERR
, "nd6_prelist_add succeeded but "
760 return (EINVAL
); /* XXX panic here? */
764 ia
= in6ifa_ifpwithaddr(ifp
, &ifra
->ifra_addr
.sin6_addr
);
766 /* XXX: This should not happen! */
767 log(LOG_ERR
, "in6_control: addition succeeded, but"
770 if ((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
771 ia
->ia6_ndpr
== NULL
) {
773 * New autoconf address
779 * If this is the first autoconf address from
780 * the prefix, create a temporary address
781 * as well (when specified).
783 if (ip6_use_tempaddr
&& pr
->ndpr_refcnt
== 1) {
786 if ((e
= in6_tmpifadd(ia
, 1)) != 0) {
787 log(LOG_NOTICE
, "in6_control: "
788 "failed to create a "
789 "temporary address, "
796 * This might affect the status of autoconfigured
797 * addresses, that is, this address might make
798 * other addresses detached.
800 pfxlist_onlink_check();
802 if (error
== 0 && ia
) {
803 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
,
804 iaIsNew
? IFADDR_EVENT_ADD
: IFADDR_EVENT_CHANGE
,
810 case SIOCDIFADDR_IN6
:
813 struct nd_prefix pr0
, *pr
;
816 * If the address being deleted is the only one that owns
817 * the corresponding prefix, expire the prefix as well.
818 * XXX: Theoretically, we don't have to warry about such
819 * relationship, since we separate the address management
820 * and the prefix management. We do this, however, to provide
821 * as much backward compatibility as possible in terms of
822 * the ioctl operation.
824 bzero(&pr0
, sizeof(pr0
));
826 pr0
.ndpr_plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
828 if (pr0
.ndpr_plen
== 128)
830 pr0
.ndpr_prefix
= ia
->ia_addr
;
831 pr0
.ndpr_mask
= ia
->ia_prefixmask
.sin6_addr
;
832 for (i
= 0; i
< 4; i
++) {
833 pr0
.ndpr_prefix
.sin6_addr
.s6_addr32
[i
] &=
834 ia
->ia_prefixmask
.sin6_addr
.s6_addr32
[i
];
837 * The logic of the following condition is a bit complicated.
838 * We expire the prefix when
839 * 1. The address obeys autoconfiguration and it is the
840 * only owner of the associated prefix, or
841 * 2. The address does not obey autoconf and there is no
842 * other owner of the prefix.
844 if ((pr
= nd6_prefix_lookup(&pr0
)) != NULL
&&
845 (((ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
846 pr
->ndpr_refcnt
== 1) ||
847 (!(ia
->ia6_flags
& IN6_IFF_AUTOCONF
) &&
848 pr
->ndpr_refcnt
== 0)))
849 pr
->ndpr_expire
= 1; /* XXX: just for expiration */
852 EVENTHANDLER_INVOKE(ifaddr_event
, ifp
, IFADDR_EVENT_DELETE
,
854 in6_purgeaddr(&ia
->ia_ifa
);
859 if (ifp
->if_ioctl
== NULL
)
861 ifnet_serialize_all(ifp
);
862 error
= ifp
->if_ioctl(ifp
, cmd
, data
, td
->td_proc
->p_ucred
);
863 ifnet_deserialize_all(ifp
);
871 * Update parameters of an IPv6 interface address.
872 * If necessary, a new entry is created and linked into address chains.
873 * This function is separated from in6_control().
874 * XXX: should this be performed under splnet()?
877 in6_update_ifa(struct ifnet
*ifp
, struct in6_aliasreq
*ifra
,
878 struct in6_ifaddr
*ia
)
880 int error
= 0, hostIsNew
= 0, was_tentative
, plen
= -1;
881 struct in6_ifaddr
*oia
;
882 struct sockaddr_in6 dst6
;
883 struct in6_addrlifetime
*lt
;
885 /* Validate parameters */
886 if (ifp
== NULL
|| ifra
== NULL
) /* this maybe redundant */
890 * The destination address for a p2p link must have a family
891 * of AF_UNSPEC or AF_INET6.
893 if ((ifp
->if_flags
& IFF_POINTOPOINT
) &&
894 ifra
->ifra_dstaddr
.sin6_family
!= AF_INET6
&&
895 ifra
->ifra_dstaddr
.sin6_family
!= AF_UNSPEC
)
896 return (EAFNOSUPPORT
);
898 * validate ifra_prefixmask. don't check sin6_family, netmask
899 * does not carry fields other than sin6_len.
901 if (ifra
->ifra_prefixmask
.sin6_len
> sizeof(struct sockaddr_in6
))
904 * Because the IPv6 address architecture is classless, we require
905 * users to specify a (non 0) prefix length (mask) for a new address.
906 * We also require the prefix (when specified) mask is valid, and thus
907 * reject a non-consecutive mask.
909 if (ia
== NULL
&& ifra
->ifra_prefixmask
.sin6_len
== 0)
911 if (ifra
->ifra_prefixmask
.sin6_len
!= 0) {
912 plen
= in6_mask2len(&ifra
->ifra_prefixmask
.sin6_addr
,
913 (u_char
*)&ifra
->ifra_prefixmask
+
914 ifra
->ifra_prefixmask
.sin6_len
);
920 * In this case, ia must not be NULL. We just use its prefix
923 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
);
926 * If the destination address on a p2p interface is specified,
927 * and the address is a scoped one, validate/set the scope
930 dst6
= ifra
->ifra_dstaddr
;
931 if ((ifp
->if_flags
& (IFF_POINTOPOINT
|IFF_LOOPBACK
)) &&
932 (dst6
.sin6_family
== AF_INET6
)) {
935 if ((error
= in6_recoverscope(&dst6
,
936 &ifra
->ifra_dstaddr
.sin6_addr
,
939 if (in6_addr2zoneid(ifp
, &dst6
.sin6_addr
, &scopeid
))
941 if (dst6
.sin6_scope_id
== 0) /* user omit to specify the ID. */
942 dst6
.sin6_scope_id
= scopeid
;
943 else if (dst6
.sin6_scope_id
!= scopeid
)
944 return (EINVAL
); /* scope ID mismatch. */
945 if ((error
= in6_embedscope(&dst6
.sin6_addr
, &dst6
, NULL
, NULL
))
948 dst6
.sin6_scope_id
= 0; /* XXX */
951 * The destination address can be specified only for a p2p or a
952 * loopback interface. If specified, the corresponding prefix length
955 if (ifra
->ifra_dstaddr
.sin6_family
== AF_INET6
) {
956 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) == 0) {
957 /* XXX: noisy message */
958 log(LOG_INFO
, "in6_update_ifa: a destination can be "
959 "specified for a p2p or a loopback IF only\n");
964 * The following message seems noisy, but we dare to
965 * add it for diagnosis.
967 log(LOG_INFO
, "in6_update_ifa: prefixlen must be 128 "
968 "when dstaddr is specified\n");
972 /* lifetime consistency check */
973 lt
= &ifra
->ifra_lifetime
;
974 if (lt
->ia6t_vltime
!= ND6_INFINITE_LIFETIME
975 && lt
->ia6t_vltime
+ time_uptime
< time_uptime
) {
978 if (lt
->ia6t_vltime
== 0) {
980 * the following log might be noisy, but this is a typical
981 * configuration mistake or a tool's bug.
984 "in6_update_ifa: valid lifetime is 0 for %s\n",
985 ip6_sprintf(&ifra
->ifra_addr
.sin6_addr
));
987 if (lt
->ia6t_pltime
!= ND6_INFINITE_LIFETIME
988 && lt
->ia6t_pltime
+ time_uptime
< time_uptime
) {
993 * If this is a new address, allocate a new ifaddr and link it
998 ia
= ifa_create(sizeof(*ia
));
1000 /* Initialize the address and masks */
1001 ia
->ia_ifa
.ifa_addr
= (struct sockaddr
*)&ia
->ia_addr
;
1002 ia
->ia_addr
.sin6_family
= AF_INET6
;
1003 ia
->ia_addr
.sin6_len
= sizeof(ia
->ia_addr
);
1004 if ((ifp
->if_flags
& (IFF_POINTOPOINT
| IFF_LOOPBACK
)) != 0) {
1006 * XXX: some functions expect that ifa_dstaddr is not
1007 * NULL for p2p interfaces.
1009 ia
->ia_ifa
.ifa_dstaddr
1010 = (struct sockaddr
*)&ia
->ia_dstaddr
;
1012 ia
->ia_ifa
.ifa_dstaddr
= NULL
;
1014 ia
->ia_ifa
.ifa_netmask
1015 = (struct sockaddr
*)&ia
->ia_prefixmask
;
1018 if ((oia
= in6_ifaddr
) != NULL
) {
1019 for ( ; oia
->ia_next
; oia
= oia
->ia_next
)
1025 ifa_iflink(&ia
->ia_ifa
, ifp
, 1);
1028 /* set prefix mask */
1029 if (ifra
->ifra_prefixmask
.sin6_len
) {
1031 * We prohibit changing the prefix length of an existing
1033 * + such an operation should be rare in IPv6, and
1034 * + the operation would confuse prefix management.
1036 if (ia
->ia_prefixmask
.sin6_len
&&
1037 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
) != plen
) {
1038 log(LOG_INFO
, "in6_update_ifa: the prefix length of an"
1039 " existing (%s) address should not be changed\n",
1040 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
1044 ia
->ia_prefixmask
= ifra
->ifra_prefixmask
;
1048 * If a new destination address is specified, scrub the old one and
1049 * install the new destination. Note that the interface must be
1050 * p2p or loopback (see the check above.)
1052 if (dst6
.sin6_family
== AF_INET6
&&
1053 !IN6_ARE_ADDR_EQUAL(&dst6
.sin6_addr
,
1054 &ia
->ia_dstaddr
.sin6_addr
)) {
1057 if ((ia
->ia_flags
& IFA_ROUTE
) &&
1058 (e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
1060 log(LOG_ERR
, "in6_update_ifa: failed to remove "
1061 "a route to the old destination: %s\n",
1062 ip6_sprintf(&ia
->ia_addr
.sin6_addr
));
1063 /* proceed anyway... */
1066 ia
->ia_flags
&= ~IFA_ROUTE
;
1067 ia
->ia_dstaddr
= dst6
;
1070 was_tentative
= ia
->ia6_flags
& (IN6_IFF_TENTATIVE
|IN6_IFF_DUPLICATED
);
1071 ia
->ia6_flags
= ifra
->ifra_flags
;
1072 ia
->ia6_flags
&= ~IN6_IFF_DUPLICATED
; /*safety*/
1073 ia
->ia6_flags
&= ~IN6_IFF_NODAD
; /* Mobile IPv6 */
1074 if ((hostIsNew
|| was_tentative
) &&
1075 in6if_do_dad(ifp
) &&
1076 !(ifra
->ifra_flags
& IN6_IFF_NODAD
))
1077 ia
->ia6_flags
|= IN6_IFF_TENTATIVE
;
1079 ia
->ia6_lifetime
= ifra
->ifra_lifetime
;
1081 if (ia
->ia6_lifetime
.ia6t_vltime
!= ND6_INFINITE_LIFETIME
) {
1082 ia
->ia6_lifetime
.ia6t_expire
=
1083 time_uptime
+ ia
->ia6_lifetime
.ia6t_vltime
;
1085 ia
->ia6_lifetime
.ia6t_expire
= 0;
1086 if (ia
->ia6_lifetime
.ia6t_pltime
!= ND6_INFINITE_LIFETIME
) {
1087 ia
->ia6_lifetime
.ia6t_preferred
=
1088 time_uptime
+ ia
->ia6_lifetime
.ia6t_pltime
;
1090 ia
->ia6_lifetime
.ia6t_preferred
= 0;
1092 /* reset the interface and routing table appropriately. */
1093 if ((error
= in6_ifinit(ifp
, ia
, &ifra
->ifra_addr
, hostIsNew
)) != 0)
1097 * Beyond this point, we should call in6_purgeaddr upon an error,
1098 * not just go to unlink.
1101 if (ifp
->if_flags
& IFF_MULTICAST
) {
1102 struct sockaddr_in6 mltaddr
, mltmask
;
1103 struct in6_multi
*in6m
;
1107 * join solicited multicast addr for new host id
1109 struct in6_addr llsol
;
1110 bzero(&llsol
, sizeof(struct in6_addr
));
1111 llsol
.s6_addr16
[0] = htons(0xff02);
1112 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1113 llsol
.s6_addr32
[1] = 0;
1114 llsol
.s6_addr32
[2] = htonl(1);
1115 llsol
.s6_addr32
[3] =
1116 ifra
->ifra_addr
.sin6_addr
.s6_addr32
[3];
1117 llsol
.s6_addr8
[12] = 0xff;
1118 in6_addmulti(&llsol
, ifp
, &error
);
1121 "in6_update_ifa: addmulti failed for "
1122 "%s on %s (errno=%d)\n",
1123 ip6_sprintf(&llsol
), if_name(ifp
),
1125 in6_purgeaddr((struct ifaddr
*)ia
);
1130 bzero(&mltmask
, sizeof(mltmask
));
1131 mltmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1132 mltmask
.sin6_family
= AF_INET6
;
1133 mltmask
.sin6_addr
= in6mask32
;
1136 * join link-local all-nodes address
1138 bzero(&mltaddr
, sizeof(mltaddr
));
1139 mltaddr
.sin6_len
= sizeof(struct sockaddr_in6
);
1140 mltaddr
.sin6_family
= AF_INET6
;
1141 mltaddr
.sin6_addr
= kin6addr_linklocal_allnodes
;
1142 mltaddr
.sin6_addr
.s6_addr16
[1] = htons(ifp
->if_index
);
1144 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1146 rtrequest_global(RTM_ADD
,
1147 (struct sockaddr
*)&mltaddr
,
1148 (struct sockaddr
*)&ia
->ia_addr
,
1149 (struct sockaddr
*)&mltmask
,
1150 RTF_UP
|RTF_CLONING
); /* xxx */
1151 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1154 "in6_update_ifa: addmulti failed for "
1155 "%s on %s (errno=%d)\n",
1156 ip6_sprintf(&mltaddr
.sin6_addr
),
1157 if_name(ifp
), error
);
1162 * join node information group address
1164 if (in6_nigroup(ifp
, hostname
, strlen(hostname
),
1165 &mltaddr
.sin6_addr
) == 0) {
1166 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1167 if (in6m
== NULL
&& ia
!= NULL
) {
1168 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1170 log(LOG_WARNING
, "in6_update_ifa: "
1171 "addmulti failed for "
1172 "%s on %s (errno=%d)\n",
1173 ip6_sprintf(&mltaddr
.sin6_addr
),
1174 if_name(ifp
), error
);
1180 * join node-local all-nodes address, on loopback.
1181 * XXX: since "node-local" is obsoleted by interface-local,
1182 * we have to join the group on every interface with
1183 * some interface-boundary restriction.
1185 if (ifp
->if_flags
& IFF_LOOPBACK
) {
1186 struct in6_ifaddr
*ia_loop
;
1188 struct in6_addr loop6
= kin6addr_loopback
;
1189 ia_loop
= in6ifa_ifpwithaddr(ifp
, &loop6
);
1191 mltaddr
.sin6_addr
= kin6addr_nodelocal_allnodes
;
1193 in6m
= IN6_LOOKUP_MULTI(&mltaddr
.sin6_addr
, ifp
);
1194 if (in6m
== NULL
&& ia_loop
!= NULL
) {
1195 rtrequest_global(RTM_ADD
,
1196 (struct sockaddr
*)&mltaddr
,
1197 (struct sockaddr
*)&ia_loop
->ia_addr
,
1198 (struct sockaddr
*)&mltmask
,
1200 in6_addmulti(&mltaddr
.sin6_addr
, ifp
, &error
);
1202 log(LOG_WARNING
, "in6_update_ifa: "
1203 "addmulti failed for %s on %s "
1205 ip6_sprintf(&mltaddr
.sin6_addr
),
1206 if_name(ifp
), error
);
1213 * Perform DAD, if needed.
1214 * XXX It may be of use, if we can administratively
1217 if (in6if_do_dad(ifp
) &&
1218 !(ifra
->ifra_flags
& IN6_IFF_NODAD
) &&
1219 ia
->ia6_flags
& IN6_IFF_TENTATIVE
)
1220 nd6_dad_start((struct ifaddr
*)ia
, NULL
);
1226 * XXX: if a change of an existing address failed, keep the entry
1230 in6_unlink_ifa(ia
, ifp
);
1235 in6_purgeaddr(struct ifaddr
*ifa
)
1237 struct ifnet
*ifp
= ifa
->ifa_ifp
;
1238 struct in6_ifaddr
*ia
= (struct in6_ifaddr
*) ifa
;
1240 /* stop DAD processing */
1244 * delete route to the destination of the address being purged.
1245 * The interface must be p2p or loopback in this case.
1247 if ((ia
->ia_flags
& IFA_ROUTE
) && ia
->ia_dstaddr
.sin6_len
!= 0) {
1250 if ((e
= rtinit(&(ia
->ia_ifa
), (int)RTM_DELETE
, RTF_HOST
))
1252 log(LOG_ERR
, "in6_purgeaddr: failed to remove "
1253 "a route to the p2p destination: %s on %s, "
1255 ip6_sprintf(&ia
->ia_addr
.sin6_addr
), if_name(ifp
),
1257 /* proceed anyway... */
1260 ia
->ia_flags
&= ~IFA_ROUTE
;
1263 /* Remove ownaddr's loopback rtentry, if it exists. */
1264 in6_ifremloop(&(ia
->ia_ifa
));
1266 if (ifp
->if_flags
& IFF_MULTICAST
) {
1268 * delete solicited multicast addr for deleting host id
1270 struct in6_multi
*in6m
;
1271 struct in6_addr llsol
;
1272 bzero(&llsol
, sizeof(struct in6_addr
));
1273 llsol
.s6_addr16
[0] = htons(0xff02);
1274 llsol
.s6_addr16
[1] = htons(ifp
->if_index
);
1275 llsol
.s6_addr32
[1] = 0;
1276 llsol
.s6_addr32
[2] = htonl(1);
1277 llsol
.s6_addr32
[3] =
1278 ia
->ia_addr
.sin6_addr
.s6_addr32
[3];
1279 llsol
.s6_addr8
[12] = 0xff;
1281 in6m
= IN6_LOOKUP_MULTI(&llsol
, ifp
);
1286 in6_unlink_ifa(ia
, ifp
);
1290 in6_unlink_ifa(struct in6_ifaddr
*ia
, struct ifnet
*ifp
)
1292 struct in6_ifaddr
*oia
;
1296 ifa_ifunlink(&ia
->ia_ifa
, ifp
);
1299 if (oia
== (ia
= in6_ifaddr
))
1300 in6_ifaddr
= ia
->ia_next
;
1302 while (ia
->ia_next
&& (ia
->ia_next
!= oia
))
1305 ia
->ia_next
= oia
->ia_next
;
1308 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1313 * When an autoconfigured address is being removed, release the
1314 * reference to the base prefix. Also, since the release might
1315 * affect the status of other (detached) addresses, call
1316 * pfxlist_onlink_check().
1318 if (oia
->ia6_flags
& IN6_IFF_AUTOCONF
) {
1319 if (oia
->ia6_ndpr
== NULL
) {
1320 log(LOG_NOTICE
, "in6_unlink_ifa: autoconf'ed address "
1321 "%p has no prefix\n", oia
);
1323 oia
->ia6_ndpr
->ndpr_refcnt
--;
1324 oia
->ia6_flags
&= ~IN6_IFF_AUTOCONF
;
1325 oia
->ia6_ndpr
= NULL
;
1328 pfxlist_onlink_check();
1332 * release another refcnt for the link from in6_ifaddr.
1333 * Note that we should decrement the refcnt at least once for all *BSD.
1335 ifa_destroy(&oia
->ia_ifa
);
1341 in6_purgeif(struct ifnet
*ifp
)
1343 struct ifaddr_container
*ifac
, *next
;
1345 TAILQ_FOREACH_MUTABLE(ifac
, &ifp
->if_addrheads
[mycpuid
],
1347 if (ifac
->ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1349 in6_purgeaddr(ifac
->ifa
);
1357 * SIOCGLIFADDR: get first address. (?)
1358 * SIOCGLIFADDR with IFLR_PREFIX:
1359 * get first address that matches the specified prefix.
1360 * SIOCALIFADDR: add the specified address.
1361 * SIOCALIFADDR with IFLR_PREFIX:
1362 * add the specified prefix, filling hostid part from
1363 * the first link-local address. prefixlen must be <= 64.
1364 * SIOCDLIFADDR: delete the specified address.
1365 * SIOCDLIFADDR with IFLR_PREFIX:
1366 * delete the first address that matches the specified prefix.
1368 * EINVAL on invalid parameters
1369 * EADDRNOTAVAIL on prefix match failed/specified address not found
1370 * other values may be returned from in6_ioctl()
1372 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1373 * this is to accomodate address naming scheme other than RFC2374,
1375 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1376 * address encoding scheme. (see figure on page 8)
1379 in6_lifaddr_ioctl(u_long cmd
, caddr_t data
, struct ifnet
*ifp
,
1382 struct if_laddrreq
*iflr
= (struct if_laddrreq
*)data
;
1383 struct sockaddr
*sa
;
1386 if (!data
|| !ifp
) {
1387 panic("invalid argument to in6_lifaddr_ioctl");
1393 /* address must be specified on GET with IFLR_PREFIX */
1394 if (!(iflr
->flags
& IFLR_PREFIX
))
1399 /* address must be specified on ADD and DELETE */
1400 sa
= (struct sockaddr
*)&iflr
->addr
;
1401 if (sa
->sa_family
!= AF_INET6
)
1403 if (sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1405 /* XXX need improvement */
1406 sa
= (struct sockaddr
*)&iflr
->dstaddr
;
1407 if (sa
->sa_family
&& sa
->sa_family
!= AF_INET6
)
1409 if (sa
->sa_len
&& sa
->sa_len
!= sizeof(struct sockaddr_in6
))
1412 default: /* shouldn't happen */
1414 panic("invalid cmd to in6_lifaddr_ioctl");
1420 if (sizeof(struct in6_addr
) * 8 < iflr
->prefixlen
)
1426 struct in6_aliasreq ifra
;
1427 struct in6_addr
*hostid
= NULL
;
1430 if (iflr
->flags
& IFLR_PREFIX
) {
1432 struct sockaddr_in6
*sin6
;
1435 * hostid is to fill in the hostid part of the
1436 * address. hostid points to the first link-local
1437 * address attached to the interface.
1439 ifa
= (struct ifaddr
*)in6ifa_ifpforlinklocal(ifp
, 0);
1441 return EADDRNOTAVAIL
;
1442 hostid
= IFA_IN6(ifa
);
1444 /* prefixlen must be <= 64. */
1445 if (64 < iflr
->prefixlen
)
1447 prefixlen
= iflr
->prefixlen
;
1449 /* hostid part must be zero. */
1450 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1451 if (sin6
->sin6_addr
.s6_addr32
[2] != 0
1452 || sin6
->sin6_addr
.s6_addr32
[3] != 0) {
1456 prefixlen
= iflr
->prefixlen
;
1458 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1459 bzero(&ifra
, sizeof(ifra
));
1460 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1461 sizeof(ifra
.ifra_name
));
1463 bcopy(&iflr
->addr
, &ifra
.ifra_addr
,
1464 ((struct sockaddr
*)&iflr
->addr
)->sa_len
);
1466 /* fill in hostid part */
1467 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[2] =
1468 hostid
->s6_addr32
[2];
1469 ifra
.ifra_addr
.sin6_addr
.s6_addr32
[3] =
1470 hostid
->s6_addr32
[3];
1473 if (((struct sockaddr
*)&iflr
->dstaddr
)->sa_family
) { /*XXX*/
1474 bcopy(&iflr
->dstaddr
, &ifra
.ifra_dstaddr
,
1475 ((struct sockaddr
*)&iflr
->dstaddr
)->sa_len
);
1477 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[2] =
1478 hostid
->s6_addr32
[2];
1479 ifra
.ifra_dstaddr
.sin6_addr
.s6_addr32
[3] =
1480 hostid
->s6_addr32
[3];
1484 ifra
.ifra_prefixmask
.sin6_len
= sizeof(struct sockaddr_in6
);
1485 in6_prefixlen2mask(&ifra
.ifra_prefixmask
.sin6_addr
, prefixlen
);
1487 ifra
.ifra_flags
= iflr
->flags
& ~IFLR_PREFIX
;
1488 return in6_control_internal(SIOCAIFADDR_IN6
, (caddr_t
)&ifra
,
1494 struct ifaddr_container
*ifac
;
1495 struct in6_ifaddr
*ia
;
1496 struct in6_addr mask
, candidate
, match
;
1497 struct sockaddr_in6
*sin6
;
1500 bzero(&mask
, sizeof(mask
));
1501 if (iflr
->flags
& IFLR_PREFIX
) {
1502 /* lookup a prefix rather than address. */
1503 in6_prefixlen2mask(&mask
, iflr
->prefixlen
);
1505 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1506 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1507 match
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1508 match
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1509 match
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1510 match
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1512 /* if you set extra bits, that's wrong */
1513 if (bcmp(&match
, &sin6
->sin6_addr
, sizeof(match
)))
1518 if (cmd
== SIOCGLIFADDR
) {
1519 /* on getting an address, take the 1st match */
1522 /* on deleting an address, do exact match */
1523 in6_prefixlen2mask(&mask
, 128);
1524 sin6
= (struct sockaddr_in6
*)&iflr
->addr
;
1525 bcopy(&sin6
->sin6_addr
, &match
, sizeof(match
));
1531 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1532 struct ifaddr
*ifa
= ifac
->ifa
;
1534 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1539 bcopy(IFA_IN6(ifa
), &candidate
, sizeof(candidate
));
1541 * XXX: this is adhoc, but is necessary to allow
1542 * a user to specify fe80::/64 (not /10) for a
1543 * link-local address.
1545 if (IN6_IS_ADDR_LINKLOCAL(&candidate
))
1546 candidate
.s6_addr16
[1] = 0;
1547 candidate
.s6_addr32
[0] &= mask
.s6_addr32
[0];
1548 candidate
.s6_addr32
[1] &= mask
.s6_addr32
[1];
1549 candidate
.s6_addr32
[2] &= mask
.s6_addr32
[2];
1550 candidate
.s6_addr32
[3] &= mask
.s6_addr32
[3];
1551 if (IN6_ARE_ADDR_EQUAL(&candidate
, &match
))
1555 return EADDRNOTAVAIL
;
1556 ia
= ifa2ia6(ifac
->ifa
);
1558 if (cmd
== SIOCGLIFADDR
) {
1559 struct sockaddr_in6
*s6
;
1561 /* fill in the if_laddrreq structure */
1562 bcopy(&ia
->ia_addr
, &iflr
->addr
, ia
->ia_addr
.sin6_len
);
1563 s6
= (struct sockaddr_in6
*)&iflr
->addr
;
1564 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1565 s6
->sin6_addr
.s6_addr16
[1] = 0;
1566 if (in6_addr2zoneid(ifp
, &s6
->sin6_addr
,
1567 &s6
->sin6_scope_id
))
1568 return (EINVAL
);/* XXX */
1570 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
1571 bcopy(&ia
->ia_dstaddr
, &iflr
->dstaddr
,
1572 ia
->ia_dstaddr
.sin6_len
);
1573 s6
= (struct sockaddr_in6
*)&iflr
->dstaddr
;
1574 if (IN6_IS_ADDR_LINKLOCAL(&s6
->sin6_addr
)) {
1575 s6
->sin6_addr
.s6_addr16
[1] = 0;
1576 if (in6_addr2zoneid(ifp
,
1577 &s6
->sin6_addr
, &s6
->sin6_scope_id
))
1578 return (EINVAL
); /* EINVAL */
1581 bzero(&iflr
->dstaddr
, sizeof(iflr
->dstaddr
));
1584 in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
,
1587 iflr
->flags
= ia
->ia6_flags
; /* XXX */
1591 struct in6_aliasreq ifra
;
1593 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1594 bzero(&ifra
, sizeof(ifra
));
1595 bcopy(iflr
->iflr_name
, ifra
.ifra_name
,
1596 sizeof(ifra
.ifra_name
));
1598 bcopy(&ia
->ia_addr
, &ifra
.ifra_addr
,
1599 ia
->ia_addr
.sin6_len
);
1600 if (ifp
->if_flags
& IFF_POINTOPOINT
)
1601 bcopy(&ia
->ia_dstaddr
, &ifra
.ifra_dstaddr
,
1602 ia
->ia_dstaddr
.sin6_len
);
1604 bzero(&ifra
.ifra_dstaddr
,
1605 sizeof(ifra
.ifra_dstaddr
));
1606 bcopy(&ia
->ia_prefixmask
, &ifra
.ifra_dstaddr
,
1607 ia
->ia_prefixmask
.sin6_len
);
1609 ifra
.ifra_flags
= ia
->ia6_flags
;
1610 return in6_control_internal(SIOCDIFADDR_IN6
,
1611 (caddr_t
)&ifra
, ifp
, td
);
1616 return EOPNOTSUPP
; /* just for safety */
1620 * Initialize an interface's internet6 address
1621 * and routing table entry.
1624 in6_ifinit(struct ifnet
*ifp
, struct in6_ifaddr
*ia
, struct sockaddr_in6
*sin6
,
1627 int error
= 0, plen
;
1629 ia
->ia_addr
= *sin6
;
1631 if (ifp
->if_ioctl
!= NULL
) {
1632 ifnet_serialize_all(ifp
);
1633 error
= ifp
->if_ioctl(ifp
, SIOCSIFADDR
, (caddr_t
)ia
, NULL
);
1634 ifnet_deserialize_all(ifp
);
1639 ia
->ia_ifa
.ifa_metric
= ifp
->if_metric
;
1641 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1645 * If the destination address is specified for a point-to-point
1646 * interface, install a route to the destination as an interface
1649 plen
= in6_mask2len(&ia
->ia_prefixmask
.sin6_addr
, NULL
); /* XXX */
1650 if (plen
== 128 && ia
->ia_dstaddr
.sin6_family
== AF_INET6
) {
1651 if ((error
= rtinit(&(ia
->ia_ifa
), (int)RTM_ADD
,
1652 RTF_UP
| RTF_HOST
)) != 0)
1654 ia
->ia_flags
|= IFA_ROUTE
;
1658 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1660 ia
->ia_ifa
.ifa_flags
|= RTF_CLONING
;
1663 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1665 /* set the rtrequest function to create llinfo */
1666 ia
->ia_ifa
.ifa_rtrequest
= nd6_rtrequest
;
1667 in6_ifaddloop(&(ia
->ia_ifa
));
1673 struct in6_multi_mship
*
1674 in6_joingroup(struct ifnet
*ifp
, struct in6_addr
*addr
, int *errorp
)
1676 struct in6_multi_mship
*imm
;
1678 imm
= kmalloc(sizeof(*imm
), M_IPMADDR
, M_NOWAIT
);
1683 imm
->i6mm_maddr
= in6_addmulti(addr
, ifp
, errorp
);
1684 if (!imm
->i6mm_maddr
) {
1685 /* *errorp is alrady set */
1686 kfree(imm
, M_IPMADDR
);
1693 in6_leavegroup(struct in6_multi_mship
*imm
)
1696 if (imm
->i6mm_maddr
)
1697 in6_delmulti(imm
->i6mm_maddr
);
1698 kfree(imm
, M_IPMADDR
);
1703 * Add an address to the list of IP6 multicast addresses for a
1707 in6_addmulti(struct in6_addr
*maddr6
, struct ifnet
*ifp
, int *errorp
)
1709 struct in6_multi
*in6m
;
1710 struct sockaddr_in6 sin6
;
1711 struct ifmultiaddr
*ifma
;
1718 * Call generic routine to add membership or increment
1719 * refcount. It wants addresses in the form of a sockaddr,
1720 * so we build one here (being careful to zero the unused bytes).
1722 bzero(&sin6
, sizeof sin6
);
1723 sin6
.sin6_family
= AF_INET6
;
1724 sin6
.sin6_len
= sizeof sin6
;
1725 sin6
.sin6_addr
= *maddr6
;
1726 *errorp
= if_addmulti(ifp
, (struct sockaddr
*)&sin6
, &ifma
);
1733 * If ifma->ifma_protospec is null, then if_addmulti() created
1734 * a new record. Otherwise, we are done.
1736 if (ifma
->ifma_protospec
!= NULL
) {
1738 return ifma
->ifma_protospec
;
1741 in6m
= kmalloc(sizeof(*in6m
), M_IPMADDR
, M_INTWAIT
| M_ZERO
);
1742 in6m
->in6m_addr
= *maddr6
;
1743 in6m
->in6m_ifp
= ifp
;
1744 in6m
->in6m_ifma
= ifma
;
1745 ifma
->ifma_protospec
= in6m
;
1746 LIST_INSERT_HEAD(&in6_multihead
, in6m
, in6m_entry
);
1749 * Let MLD6 know that we have joined a new IP6 multicast
1752 mld6_start_listening(in6m
);
1758 * Delete a multicast address record.
1761 in6_delmulti(struct in6_multi
*in6m
)
1763 struct ifmultiaddr
*ifma
= in6m
->in6m_ifma
;
1767 if (ifma
->ifma_refcount
== 1) {
1769 * No remaining claims to this record; let MLD6 know
1770 * that we are leaving the multicast group.
1772 mld6_stop_listening(in6m
);
1773 ifma
->ifma_protospec
= NULL
;
1774 LIST_REMOVE(in6m
, in6m_entry
);
1775 kfree(in6m
, M_IPMADDR
);
1777 /* XXX - should be separate API for when we have an ifma? */
1778 if_delmulti(ifma
->ifma_ifp
, ifma
->ifma_addr
);
1783 * Find an IPv6 interface link-local address specific to an interface.
1786 in6ifa_ifpforlinklocal(struct ifnet
*ifp
, int ignoreflags
)
1788 const struct ifaddr_container
*ifac
;
1790 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1791 struct ifaddr
*ifa
= ifac
->ifa
;
1793 if (ifa
->ifa_addr
== NULL
)
1794 continue; /* just for safety */
1795 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1797 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa
))) {
1798 if ((((struct in6_ifaddr
*)ifa
)->ia6_flags
&
1801 return (struct in6_ifaddr
*)ifa
;
1809 * find the internet address corresponding to a given interface and address.
1812 in6ifa_ifpwithaddr(struct ifnet
*ifp
, struct in6_addr
*addr
)
1814 const struct ifaddr_container
*ifac
;
1816 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1817 struct ifaddr
*ifa
= ifac
->ifa
;
1819 if (ifa
->ifa_addr
== NULL
)
1820 continue; /* just for safety */
1821 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1823 if (IN6_ARE_ADDR_EQUAL(addr
, IFA_IN6(ifa
)))
1824 return (struct in6_ifaddr
*)ifa
;
1830 * Find a link-local scoped address on ifp and return it if any.
1833 in6ifa_llaonifp(struct ifnet
*ifp
)
1835 const struct ifaddr_container
*ifac
;
1837 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1838 const struct sockaddr_in6
*sin6
;
1839 struct ifaddr
*ifa
= ifac
->ifa
;
1841 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
1843 sin6
= (const struct sockaddr_in6
*)ifa
->ifa_addr
;
1844 if (IN6_IS_SCOPE_LINKLOCAL(&sin6
->sin6_addr
) ||
1845 /* XXX why are mcast addresses ifp address list? */
1846 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6
->sin6_addr
) ||
1847 IN6_IS_ADDR_MC_NODELOCAL(&sin6
->sin6_addr
))
1848 return (struct in6_ifaddr
*)ifa
;
1854 * Convert IP6 address to printable (loggable) representation.
1856 static char digits
[] = "0123456789abcdef";
1857 static int ip6round
= 0;
1859 ip6_sprintf(const struct in6_addr
*addr
)
1861 static char ip6buf
[8][48];
1864 const u_short
*a
= (const u_short
*)addr
;
1868 ip6round
= (ip6round
+ 1) & 7;
1869 cp
= ip6buf
[ip6round
];
1871 for (i
= 0; i
< 8; i
++) {
1882 if (dcolon
== 0 && *(a
+ 1) == 0) {
1894 d
= (const u_char
*)a
;
1895 *cp
++ = digits
[*d
>> 4];
1896 *cp
++ = digits
[*d
++ & 0xf];
1897 *cp
++ = digits
[*d
>> 4];
1898 *cp
++ = digits
[*d
& 0xf];
1903 return (ip6buf
[ip6round
]);
1907 in6_localaddr(struct in6_addr
*in6
)
1909 struct in6_ifaddr
*ia
;
1911 if (IN6_IS_ADDR_LOOPBACK(in6
) || IN6_IS_ADDR_LINKLOCAL(in6
))
1914 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
)
1915 if (IN6_ARE_MASKED_ADDR_EQUAL(in6
, &ia
->ia_addr
.sin6_addr
,
1916 &ia
->ia_prefixmask
.sin6_addr
))
1923 in6_is_addr_deprecated(struct sockaddr_in6
*sa6
)
1925 struct in6_ifaddr
*ia
;
1927 for (ia
= in6_ifaddr
; ia
; ia
= ia
->ia_next
) {
1928 if (IN6_ARE_ADDR_EQUAL(&ia
->ia_addr
.sin6_addr
,
1930 (ia
->ia6_flags
& IN6_IFF_DEPRECATED
))
1931 return (1); /* true */
1933 /* XXX: do we still have to go thru the rest of the list? */
1936 return (0); /* false */
1940 * return length of part which dst and src are equal
1944 in6_matchlen(struct in6_addr
*src
, struct in6_addr
*dst
)
1947 u_char
*s
= (u_char
*)src
, *d
= (u_char
*)dst
;
1948 u_char
*lim
= s
+ 16, r
;
1951 if ((r
= (*d
++ ^ *s
++)) != 0) {
1962 /* XXX: to be scope conscious */
1964 in6_are_prefix_equal(struct in6_addr
*p1
, struct in6_addr
*p2
, int len
)
1966 int bytelen
, bitlen
;
1969 if (0 > len
|| len
> 128) {
1970 log(LOG_ERR
, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1978 if (bcmp(&p1
->s6_addr
, &p2
->s6_addr
, bytelen
))
1980 if (p1
->s6_addr
[bytelen
] >> (8 - bitlen
) !=
1981 p2
->s6_addr
[bytelen
] >> (8 - bitlen
))
1988 in6_prefixlen2mask(struct in6_addr
*maskp
, int len
)
1990 u_char maskarray
[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1991 int bytelen
, bitlen
, i
;
1994 if (0 > len
|| len
> 128) {
1995 log(LOG_ERR
, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2000 bzero(maskp
, sizeof(*maskp
));
2003 for (i
= 0; i
< bytelen
; i
++)
2004 maskp
->s6_addr
[i
] = 0xff;
2006 maskp
->s6_addr
[bytelen
] = maskarray
[bitlen
- 1];
2010 * return the best address out of the same scope
2013 in6_ifawithscope(struct ifnet
*oifp
, struct in6_addr
*dst
, struct ucred
*cred
)
2015 int dst_scope
= in6_addrscope(dst
), src_scope
, best_scope
= 0;
2017 struct in6_ifaddr
*ifa_best
= NULL
;
2018 u_int32_t dstzone
, odstzone
;
2020 const struct ifnet_array
*arr
;
2023 if(cred
&& cred
->cr_prison
)
2029 if (in6_addr2zoneid(oifp
, dst
, &odstzone
))
2033 * We search for all addresses on all interfaces from the beginning.
2034 * Comparing an interface with the outgoing interface will be done
2035 * only at the final stage of tiebreaking.
2037 arr
= ifnet_array_get();
2038 for (i
= 0; i
< arr
->ifnet_count
; ++i
) {
2039 struct ifnet
*ifp
= arr
->ifnet_arr
[i
];
2040 struct ifaddr_container
*ifac
;
2043 * We can never take an address that breaks the scope zone
2044 * of the destination.
2046 if (ifp
->if_afdata
[AF_INET6
] == NULL
)
2048 if (in6_addr2zoneid(ifp
, dst
, &dstzone
) || dstzone
!= odstzone
)
2051 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2052 int tlen
= -1, dscopecmp
, bscopecmp
, matchcmp
;
2053 struct ifaddr
*ifa
= ifac
->ifa
;
2055 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2058 src_scope
= in6_addrscope(IFA_IN6(ifa
));
2061 * Don't use an address before completing DAD
2062 * nor a duplicated address.
2064 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2068 /* XXX: is there any case to allow anycasts? */
2069 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2073 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2077 /* Skip adresses not valid for current jail */
2079 !(jailed_ip(cred
->cr_prison
, (struct sockaddr
*)(ifa
->ifa_addr
)) != 0))
2083 * If this is the first address we find,
2086 if (ifa_best
== NULL
)
2090 * ifa_best is never NULL beyond this line except
2091 * within the block labeled "replace".
2095 * If ifa_best has a smaller scope than dst and
2096 * the current address has a larger one than
2097 * (or equal to) dst, always replace ifa_best.
2098 * Also, if the current address has a smaller scope
2099 * than dst, ignore it unless ifa_best also has a
2101 * Consequently, after the two if-clause below,
2102 * the followings must be satisfied:
2103 * (scope(src) < scope(dst) &&
2104 * scope(best) < scope(dst))
2106 * (scope(best) >= scope(dst) &&
2107 * scope(src) >= scope(dst))
2109 if (IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) < 0 &&
2110 IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) >= 0)
2111 goto replace
; /* (A) */
2112 if (IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
) < 0 &&
2113 IN6_ARE_SCOPE_CMP(best_scope
, dst_scope
) >= 0)
2117 * A deprecated address SHOULD NOT be used in new
2118 * communications if an alternate (non-deprecated)
2119 * address is available and has sufficient scope.
2120 * RFC 2462, Section 5.5.4.
2122 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2123 IN6_IFF_DEPRECATED
) {
2125 * Ignore any deprecated addresses if
2126 * specified by configuration.
2128 if (!ip6_use_deprecated
)
2132 * If we have already found a non-deprecated
2133 * candidate, just ignore deprecated addresses.
2135 if (!(ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
))
2140 * A non-deprecated address is always preferred
2141 * to a deprecated one regardless of scopes and
2142 * address matching (Note invariants ensured by the
2143 * conditions (A) and (B) above.)
2145 if ((ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
) &&
2146 !(((struct in6_ifaddr
*)ifa
)->ia6_flags
&
2147 IN6_IFF_DEPRECATED
))
2151 * When we use temporary addresses described in
2152 * RFC 3041, we prefer temporary addresses to
2153 * public autoconf addresses. Again, note the
2154 * invariants from (A) and (B). Also note that we
2155 * don't have any preference between static addresses
2156 * and autoconf addresses (despite of whether or not
2157 * the latter is temporary or public.)
2159 if (ip6_use_tempaddr
) {
2160 struct in6_ifaddr
*ifat
;
2162 ifat
= (struct in6_ifaddr
*)ifa
;
2163 if ((ifa_best
->ia6_flags
&
2164 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2165 == IN6_IFF_AUTOCONF
&&
2167 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2168 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
)) {
2171 if ((ifa_best
->ia6_flags
&
2172 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2173 == (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
) &&
2175 (IN6_IFF_AUTOCONF
|IN6_IFF_TEMPORARY
))
2176 == IN6_IFF_AUTOCONF
) {
2182 * At this point, we have two cases:
2183 * 1. we are looking at a non-deprecated address,
2184 * and ifa_best is also non-deprecated.
2185 * 2. we are looking at a deprecated address,
2186 * and ifa_best is also deprecated.
2187 * Also, we do not have to consider a case where
2188 * the scope of if_best is larger(smaller) than dst and
2189 * the scope of the current address is smaller(larger)
2190 * than dst. Such a case has already been covered.
2191 * Tiebreaking is done according to the following
2193 * - the scope comparison between the address and
2195 * - the scope comparison between the address and
2196 * ifa_best (bscopecmp)
2197 * - if the address match dst longer than ifa_best
2199 * - if the address is on the outgoing I/F (outI/F)
2201 * Roughly speaking, the selection policy is
2202 * - the most important item is scope. The same scope
2203 * is best. Then search for a larger scope.
2204 * Smaller scopes are the last resort.
2205 * - A deprecated address is chosen only when we have
2206 * no address that has an enough scope, but is
2207 * prefered to any addresses of smaller scopes
2208 * (this must be already done above.)
2209 * - addresses on the outgoing I/F are preferred to
2210 * ones on other interfaces if none of above
2211 * tiebreaks. In the table below, the column "bI"
2212 * means if the best_ifa is on the outgoing
2213 * interface, and the column "sI" means if the ifa
2214 * is on the outgoing interface.
2215 * - If there is no other reasons to choose one,
2216 * longest address match against dst is considered.
2218 * The precise decision table is as follows:
2219 * dscopecmp bscopecmp match bI oI | replace?
2220 * N/A equal N/A Y N | No (1)
2221 * N/A equal N/A N Y | Yes (2)
2222 * N/A equal larger N/A | Yes (3)
2223 * N/A equal !larger N/A | No (4)
2224 * larger larger N/A N/A | No (5)
2225 * larger smaller N/A N/A | Yes (6)
2226 * smaller larger N/A N/A | Yes (7)
2227 * smaller smaller N/A N/A | No (8)
2228 * equal smaller N/A N/A | Yes (9)
2229 * equal larger (already done at A above)
2231 dscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, dst_scope
);
2232 bscopecmp
= IN6_ARE_SCOPE_CMP(src_scope
, best_scope
);
2234 if (bscopecmp
== 0) {
2235 struct ifnet
*bifp
= ifa_best
->ia_ifp
;
2237 if (bifp
== oifp
&& ifp
!= oifp
) /* (1) */
2239 if (bifp
!= oifp
&& ifp
== oifp
) /* (2) */
2243 * Both bifp and ifp are on the outgoing
2244 * interface, or both two are on a different
2245 * interface from the outgoing I/F.
2246 * now we need address matching against dst
2249 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2250 matchcmp
= tlen
- blen
;
2251 if (matchcmp
> 0) /* (3) */
2255 if (dscopecmp
> 0) {
2256 if (bscopecmp
> 0) /* (5) */
2258 goto replace
; /* (6) */
2260 if (dscopecmp
< 0) {
2261 if (bscopecmp
> 0) /* (7) */
2266 /* now dscopecmp must be 0 */
2268 goto replace
; /* (9) */
2271 ifa_best
= (struct in6_ifaddr
*)ifa
;
2272 blen
= tlen
>= 0 ? tlen
:
2273 in6_matchlen(IFA_IN6(ifa
), dst
);
2274 best_scope
= in6_addrscope(&ifa_best
->ia_addr
.sin6_addr
);
2278 /* count statistics for future improvements */
2279 if (ifa_best
== NULL
)
2280 ip6stat
.ip6s_sources_none
++;
2282 if (oifp
== ifa_best
->ia_ifp
)
2283 ip6stat
.ip6s_sources_sameif
[best_scope
]++;
2285 ip6stat
.ip6s_sources_otherif
[best_scope
]++;
2287 if (best_scope
== dst_scope
)
2288 ip6stat
.ip6s_sources_samescope
[best_scope
]++;
2290 ip6stat
.ip6s_sources_otherscope
[best_scope
]++;
2292 if (ifa_best
->ia6_flags
& IN6_IFF_DEPRECATED
)
2293 ip6stat
.ip6s_sources_deprecated
[best_scope
]++;
2300 * return the best address out of the same scope. if no address was
2301 * found, return the first valid address from designated IF.
2304 in6_ifawithifp(struct ifnet
*ifp
, struct in6_addr
*dst
)
2306 int dst_scope
= in6_addrscope(dst
), blen
= -1, tlen
;
2307 struct ifaddr_container
*ifac
;
2308 struct in6_ifaddr
*besta
= NULL
;
2309 struct in6_ifaddr
*dep
[2]; /* last-resort: deprecated */
2311 dep
[0] = dep
[1] = NULL
;
2314 * We first look for addresses in the same scope.
2315 * If there is one, return it.
2316 * If two or more, return one which matches the dst longest.
2317 * If none, return one of global addresses assigned other ifs.
2319 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2320 struct ifaddr
*ifa
= ifac
->ifa
;
2322 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2324 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2325 continue; /* XXX: is there any case to allow anycast? */
2326 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2327 continue; /* don't use this interface */
2328 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2330 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2331 if (ip6_use_deprecated
)
2332 dep
[0] = (struct in6_ifaddr
*)ifa
;
2336 if (dst_scope
== in6_addrscope(IFA_IN6(ifa
))) {
2338 * call in6_matchlen() as few as possible
2342 blen
= in6_matchlen(&besta
->ia_addr
.sin6_addr
, dst
);
2343 tlen
= in6_matchlen(IFA_IN6(ifa
), dst
);
2346 besta
= (struct in6_ifaddr
*)ifa
;
2349 besta
= (struct in6_ifaddr
*)ifa
;
2355 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2356 struct ifaddr
*ifa
= ifac
->ifa
;
2358 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2360 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_ANYCAST
)
2361 continue; /* XXX: is there any case to allow anycast? */
2362 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_NOTREADY
)
2363 continue; /* don't use this interface */
2364 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DETACHED
)
2366 if (((struct in6_ifaddr
*)ifa
)->ia6_flags
& IN6_IFF_DEPRECATED
) {
2367 if (ip6_use_deprecated
)
2368 dep
[1] = (struct in6_ifaddr
*)ifa
;
2372 return (struct in6_ifaddr
*)ifa
;
2375 /* use the last-resort values, that are, deprecated addresses */
2385 * perform DAD when interface becomes IFF_UP.
2388 in6_if_up_dispatch(netmsg_t nmsg
)
2390 struct ifnet
*ifp
= nmsg
->lmsg
.u
.ms_resultp
;
2391 struct ifaddr_container
*ifac
;
2392 struct in6_ifaddr
*ia
;
2393 int dad_delay
; /* delay ticks before DAD output */
2397 in6_ifattach(ifp
, NULL
); /* will handle special cases */
2400 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
2401 struct ifaddr
*ifa
= ifac
->ifa
;
2403 if (ifa
->ifa_addr
->sa_family
!= AF_INET6
)
2405 ia
= (struct in6_ifaddr
*)ifa
;
2406 if (ia
->ia6_flags
& IN6_IFF_TENTATIVE
)
2407 nd6_dad_start(ifa
, &dad_delay
);
2410 netisr_replymsg(&nmsg
->base
, 0);
2414 in6_if_up(struct ifnet
*ifp
)
2416 struct netmsg_base nmsg
;
2418 netmsg_init(&nmsg
, NULL
, &curthread
->td_msgport
, 0, in6_if_up_dispatch
);
2419 nmsg
.lmsg
.u
.ms_resultp
= ifp
;
2420 netisr_domsg(&nmsg
, 0);
2424 in6_if_down(struct ifnet
*ifp
)
2426 rt_purgecloned(ifp
, AF_INET6
);
2430 in6if_do_dad(struct ifnet
*ifp
)
2432 if (ifp
->if_flags
& IFF_LOOPBACK
)
2434 if (!(ifp
->if_flags
& IFF_MULTICAST
))
2438 * Our DAD routine requires the interface up and running.
2439 * However, some interfaces can be up before the RUNNING
2440 * status. Additionally, 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 workaround.
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
)) != (IFF_UP
|IFF_RUNNING
))
2449 if (ND_IFINFO(ifp
)->flags
& ND6_IFF_NO_DAD
)
2456 * Calculate max IPv6 MTU through all the interfaces and store it
2462 unsigned long maxmtu
= 0;
2463 const struct ifnet_array
*arr
;
2468 arr
= ifnet_array_get();
2469 for (i
= 0; i
< arr
->ifnet_count
; ++i
) {
2470 struct ifnet
*ifp
= arr
->ifnet_arr
[i
];
2472 /* this function can be called during ifnet initialization */
2473 if (ifp
->if_afdata
[AF_INET6
] == NULL
)
2475 if ((ifp
->if_flags
& IFF_LOOPBACK
) == 0 &&
2476 IN6_LINKMTU(ifp
) > maxmtu
)
2477 maxmtu
= IN6_LINKMTU(ifp
);
2479 if (maxmtu
) /* update only when maxmtu is positive */
2480 in6_maxmtu
= maxmtu
;
2484 in6_domifattach(struct ifnet
*ifp
)
2486 struct in6_ifextra
*ext
;
2488 ext
= (struct in6_ifextra
*)kmalloc(sizeof(*ext
), M_IFADDR
, M_WAITOK
);
2489 bzero(ext
, sizeof(*ext
));
2491 ext
->in6_ifstat
= (struct in6_ifstat
*)kmalloc(sizeof(struct in6_ifstat
),
2492 M_IFADDR
, M_WAITOK
);
2493 bzero(ext
->in6_ifstat
, sizeof(*ext
->in6_ifstat
));
2496 (struct icmp6_ifstat
*)kmalloc(sizeof(struct icmp6_ifstat
),
2497 M_IFADDR
, M_WAITOK
);
2498 bzero(ext
->icmp6_ifstat
, sizeof(*ext
->icmp6_ifstat
));
2500 ext
->nd_ifinfo
= nd6_ifattach(ifp
);
2501 ext
->scope6_id
= scope6_ifattach(ifp
);
2506 in6_domifdetach(struct ifnet
*ifp
, void *aux
)
2508 struct in6_ifextra
*ext
= (struct in6_ifextra
*)aux
;
2509 scope6_ifdetach(ext
->scope6_id
);
2510 nd6_ifdetach(ext
->nd_ifinfo
);
2511 kfree(ext
->in6_ifstat
, M_IFADDR
);
2512 kfree(ext
->icmp6_ifstat
, M_IFADDR
);
2513 kfree(ext
, M_IFADDR
);