2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
20 * Janos Farkas : delete timer on ifdown
21 * <chexum@bankinf.banki.hu>
22 * Andi Kleen : kill double kfree on module
24 * Maciej W. Rozycki : FDDI support
25 * sekiya@USAGI : Don't send too many RS
27 * yoshfuji@USAGI : Fixed interval between DAD
29 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
30 * address validation timer.
31 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
33 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
34 * address on a same interface.
35 * YOSHIFUJI Hideaki @USAGI : ARCnet support
36 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
38 * YOSHIFUJI Hideaki @USAGI : improved source address
39 * selection; consider scope,
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/net.h>
48 #include <linux/in6.h>
49 #include <linux/netdevice.h>
50 #include <linux/if_addr.h>
51 #include <linux/if_arp.h>
52 #include <linux/if_arcnet.h>
53 #include <linux/if_infiniband.h>
54 #include <linux/route.h>
55 #include <linux/inetdevice.h>
56 #include <linux/init.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <net/pkt_sched.h>
78 #include <linux/if_tunnel.h>
79 #include <linux/rtnetlink.h>
81 #ifdef CONFIG_IPV6_PRIVACY
82 #include <linux/random.h>
85 #include <asm/uaccess.h>
86 #include <asm/unaligned.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
91 /* Set to 3 to get tracing... */
95 #define ADBG(x) printk x
100 #define INFINITY_LIFE_TIME 0xFFFFFFFF
101 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
104 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
105 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
107 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
111 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
116 #ifdef CONFIG_IPV6_PRIVACY
117 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
118 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
119 static void ipv6_regen_rndid(unsigned long data
);
121 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
124 static int ipv6_count_addresses(struct inet6_dev
*idev
);
127 * Configured unicast address hash table
129 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
130 static DEFINE_RWLOCK(addrconf_hash_lock
);
132 static void addrconf_verify(unsigned long);
134 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
135 static DEFINE_SPINLOCK(addrconf_verify_lock
);
137 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
138 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
140 static int addrconf_ifdown(struct net_device
*dev
, int how
);
142 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
143 static void addrconf_dad_timer(unsigned long data
);
144 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
145 static void addrconf_dad_run(struct inet6_dev
*idev
);
146 static void addrconf_rs_timer(unsigned long data
);
147 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
148 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
150 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
151 struct prefix_info
*pinfo
);
152 static int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
153 struct net_device
*dev
);
155 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
157 struct ipv6_devconf ipv6_devconf __read_mostly
= {
159 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
160 .mtu6
= IPV6_MIN_MTU
,
162 .accept_redirects
= 1,
164 .force_mld_version
= 0,
166 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
167 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
168 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
169 #ifdef CONFIG_IPV6_PRIVACY
171 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
172 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
173 .regen_max_retry
= REGEN_MAX_RETRY
,
174 .max_desync_factor
= MAX_DESYNC_FACTOR
,
176 .max_addresses
= IPV6_MAX_ADDRESSES
,
177 .accept_ra_defrtr
= 1,
178 .accept_ra_pinfo
= 1,
179 #ifdef CONFIG_IPV6_ROUTER_PREF
180 .accept_ra_rtr_pref
= 1,
181 .rtr_probe_interval
= 60 * HZ
,
182 #ifdef CONFIG_IPV6_ROUTE_INFO
183 .accept_ra_rt_info_max_plen
= 0,
187 .accept_source_route
= 0, /* we do not accept RH0 by default. */
190 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
192 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
193 .mtu6
= IPV6_MIN_MTU
,
195 .accept_redirects
= 1,
198 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
199 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
200 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
201 #ifdef CONFIG_IPV6_PRIVACY
203 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
204 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
205 .regen_max_retry
= REGEN_MAX_RETRY
,
206 .max_desync_factor
= MAX_DESYNC_FACTOR
,
208 .max_addresses
= IPV6_MAX_ADDRESSES
,
209 .accept_ra_defrtr
= 1,
210 .accept_ra_pinfo
= 1,
211 #ifdef CONFIG_IPV6_ROUTER_PREF
212 .accept_ra_rtr_pref
= 1,
213 .rtr_probe_interval
= 60 * HZ
,
214 #ifdef CONFIG_IPV6_ROUTE_INFO
215 .accept_ra_rt_info_max_plen
= 0,
219 .accept_source_route
= 0, /* we do not accept RH0 by default. */
222 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
223 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
224 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
226 /* Check if a valid qdisc is available */
227 static inline int addrconf_qdisc_ok(struct net_device
*dev
)
229 return (dev
->qdisc
!= &noop_qdisc
);
232 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
234 if (del_timer(&ifp
->timer
))
238 enum addrconf_timer_t
245 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
246 enum addrconf_timer_t what
,
249 if (!del_timer(&ifp
->timer
))
254 ifp
->timer
.function
= addrconf_dad_timer
;
257 ifp
->timer
.function
= addrconf_rs_timer
;
261 ifp
->timer
.expires
= jiffies
+ when
;
262 add_timer(&ifp
->timer
);
265 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
267 if (snmp_mib_init((void **)idev
->stats
.ipv6
,
268 sizeof(struct ipstats_mib
)) < 0)
270 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
271 sizeof(struct icmpv6_mib
)) < 0)
273 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
274 sizeof(struct icmpv6msg_mib
)) < 0)
280 snmp_mib_free((void **)idev
->stats
.icmpv6
);
282 snmp_mib_free((void **)idev
->stats
.ipv6
);
287 static void snmp6_free_dev(struct inet6_dev
*idev
)
289 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
290 snmp_mib_free((void **)idev
->stats
.icmpv6
);
291 snmp_mib_free((void **)idev
->stats
.ipv6
);
294 /* Nobody refers to this device, we may destroy it. */
296 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
298 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
302 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
304 struct net_device
*dev
= idev
->dev
;
305 BUG_TRAP(idev
->addr_list
==NULL
);
306 BUG_TRAP(idev
->mc_list
==NULL
);
307 #ifdef NET_REFCNT_DEBUG
308 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
312 printk("Freeing alive inet6 device %p\n", idev
);
315 snmp6_free_dev(idev
);
316 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
319 EXPORT_SYMBOL(in6_dev_finish_destroy
);
321 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
323 struct inet6_dev
*ndev
;
324 struct in6_addr maddr
;
328 if (dev
->mtu
< IPV6_MIN_MTU
)
331 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
336 rwlock_init(&ndev
->lock
);
338 memcpy(&ndev
->cnf
, dev
->nd_net
->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
339 ndev
->cnf
.mtu6
= dev
->mtu
;
340 ndev
->cnf
.sysctl
= NULL
;
341 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
342 if (ndev
->nd_parms
== NULL
) {
346 /* We refer to the device */
349 if (snmp6_alloc_dev(ndev
) < 0) {
351 "%s(): cannot allocate memory for statistics; dev=%s.\n",
352 __func__
, dev
->name
));
353 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
355 in6_dev_finish_destroy(ndev
);
359 if (snmp6_register_dev(ndev
) < 0) {
361 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
362 __func__
, dev
->name
));
363 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
365 in6_dev_finish_destroy(ndev
);
369 /* One reference from device. We must do this before
370 * we invoke __ipv6_regen_rndid().
374 #ifdef CONFIG_IPV6_PRIVACY
375 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
376 if ((dev
->flags
&IFF_LOOPBACK
) ||
377 dev
->type
== ARPHRD_TUNNEL
||
378 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
379 dev
->type
== ARPHRD_SIT
||
381 dev
->type
== ARPHRD_NONE
) {
383 "%s: Disabled Privacy Extensions\n",
385 ndev
->cnf
.use_tempaddr
= -1;
387 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
389 "%s: Disabled Multicast RS\n",
391 ndev
->cnf
.rtr_solicits
= 0;
395 ipv6_regen_rndid((unsigned long) ndev
);
399 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
400 ndev
->if_flags
|= IF_READY
;
402 ipv6_mc_init_dev(ndev
);
403 ndev
->tstamp
= jiffies
;
404 addrconf_sysctl_register(ndev
);
405 /* protected by rtnl_lock */
406 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
408 /* Join all-node multicast group */
409 ipv6_addr_all_nodes(&maddr
);
410 ipv6_dev_mc_inc(dev
, &maddr
);
415 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
417 struct inet6_dev
*idev
;
421 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
422 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
426 if (dev
->flags
&IFF_UP
)
432 static void dev_forward_change(struct inet6_dev
*idev
)
434 struct net_device
*dev
;
435 struct inet6_ifaddr
*ifa
;
436 struct in6_addr addr
;
441 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
442 ipv6_addr_all_routers(&addr
);
444 if (idev
->cnf
.forwarding
)
445 ipv6_dev_mc_inc(dev
, &addr
);
447 ipv6_dev_mc_dec(dev
, &addr
);
449 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
450 if (ifa
->flags
&IFA_F_TENTATIVE
)
452 if (idev
->cnf
.forwarding
)
453 addrconf_join_anycast(ifa
);
455 addrconf_leave_anycast(ifa
);
460 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
462 struct net_device
*dev
;
463 struct inet6_dev
*idev
;
465 read_lock(&dev_base_lock
);
466 for_each_netdev(net
, dev
) {
468 idev
= __in6_dev_get(dev
);
470 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
471 idev
->cnf
.forwarding
= newf
;
473 dev_forward_change(idev
);
477 read_unlock(&dev_base_lock
);
480 static void addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
484 net
= (struct net
*)table
->extra2
;
485 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
488 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
489 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
490 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
491 addrconf_forward_change(net
, newf
);
492 } else if ((!*p
) ^ (!old
))
493 dev_forward_change((struct inet6_dev
*)table
->extra1
);
496 rt6_purge_dflt_routers(net
);
500 /* Nobody refers to this ifaddr, destroy it */
502 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
504 BUG_TRAP(ifp
->if_next
==NULL
);
505 BUG_TRAP(ifp
->lst_next
==NULL
);
506 #ifdef NET_REFCNT_DEBUG
507 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
510 in6_dev_put(ifp
->idev
);
512 if (del_timer(&ifp
->timer
))
513 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
516 printk("Freeing alive inet6 address %p\n", ifp
);
519 dst_release(&ifp
->rt
->u
.dst
);
525 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
527 struct inet6_ifaddr
*ifa
, **ifap
;
528 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
531 * Each device address list is sorted in order of scope -
532 * global before linklocal.
534 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
535 ifap
= &ifa
->if_next
) {
536 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
540 ifp
->if_next
= *ifap
;
544 /* On success it returns ifp with increased reference count */
546 static struct inet6_ifaddr
*
547 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
548 int scope
, u32 flags
)
550 struct inet6_ifaddr
*ifa
= NULL
;
557 err
= -ENODEV
; /*XXX*/
561 write_lock(&addrconf_hash_lock
);
563 /* Ignore adding duplicate addresses on an interface */
564 if (ipv6_chk_same_addr(idev
->dev
->nd_net
, addr
, idev
->dev
)) {
565 ADBG(("ipv6_add_addr: already assigned\n"));
570 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
573 ADBG(("ipv6_add_addr: malloc failed\n"));
578 rt
= addrconf_dst_alloc(idev
, addr
, 0);
584 ipv6_addr_copy(&ifa
->addr
, addr
);
586 spin_lock_init(&ifa
->lock
);
587 init_timer(&ifa
->timer
);
588 ifa
->timer
.data
= (unsigned long) ifa
;
590 ifa
->prefix_len
= pfxlen
;
591 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
592 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
597 * part one of RFC 4429, section 3.3
598 * We should not configure an address as
599 * optimistic if we do not yet know the link
600 * layer address of our nexhop router
603 if (rt
->rt6i_nexthop
== NULL
)
604 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
611 /* Add to big hash table */
612 hash
= ipv6_addr_hash(addr
);
614 ifa
->lst_next
= inet6_addr_lst
[hash
];
615 inet6_addr_lst
[hash
] = ifa
;
617 write_unlock(&addrconf_hash_lock
);
619 write_lock(&idev
->lock
);
620 /* Add to inet6_dev unicast addr list. */
621 ipv6_link_dev_addr(idev
, ifa
);
623 #ifdef CONFIG_IPV6_PRIVACY
624 if (ifa
->flags
&IFA_F_TEMPORARY
) {
625 ifa
->tmp_next
= idev
->tempaddr_list
;
626 idev
->tempaddr_list
= ifa
;
632 write_unlock(&idev
->lock
);
634 rcu_read_unlock_bh();
636 if (likely(err
== 0))
637 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
645 write_unlock(&addrconf_hash_lock
);
649 /* This function wants to get referenced ifp and releases it before return */
651 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
653 struct inet6_ifaddr
*ifa
, **ifap
;
654 struct inet6_dev
*idev
= ifp
->idev
;
656 int deleted
= 0, onlink
= 0;
657 unsigned long expires
= jiffies
;
659 hash
= ipv6_addr_hash(&ifp
->addr
);
663 write_lock_bh(&addrconf_hash_lock
);
664 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
665 ifap
= &ifa
->lst_next
) {
667 *ifap
= ifa
->lst_next
;
669 ifa
->lst_next
= NULL
;
673 write_unlock_bh(&addrconf_hash_lock
);
675 write_lock_bh(&idev
->lock
);
676 #ifdef CONFIG_IPV6_PRIVACY
677 if (ifp
->flags
&IFA_F_TEMPORARY
) {
678 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
679 ifap
= &ifa
->tmp_next
) {
681 *ifap
= ifa
->tmp_next
;
683 in6_ifa_put(ifp
->ifpub
);
687 ifa
->tmp_next
= NULL
;
694 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
696 *ifap
= ifa
->if_next
;
699 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
703 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
704 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
706 if (ifa
->flags
& IFA_F_PERMANENT
) {
711 unsigned long lifetime
;
716 spin_lock(&ifa
->lock
);
717 lifetime
= min_t(unsigned long,
718 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
719 if (time_before(expires
,
720 ifa
->tstamp
+ lifetime
* HZ
))
721 expires
= ifa
->tstamp
+ lifetime
* HZ
;
722 spin_unlock(&ifa
->lock
);
726 ifap
= &ifa
->if_next
;
728 write_unlock_bh(&idev
->lock
);
730 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
732 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
734 addrconf_del_timer(ifp
);
737 * Purge or update corresponding prefix
739 * 1) we don't purge prefix here if address was not permanent.
740 * prefix is managed by its own lifetime.
741 * 2) if there're no addresses, delete prefix.
742 * 3) if there're still other permanent address(es),
743 * corresponding prefix is still permanent.
744 * 4) otherwise, update prefix lifetime to the
745 * longest valid lifetime among the corresponding
746 * addresses on the device.
747 * Note: subsequent RA will update lifetime.
751 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
752 struct in6_addr prefix
;
754 struct net
*net
= ifp
->idev
->dev
->nd_net
;
755 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
756 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
758 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
762 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
763 rt
->rt6i_expires
= expires
;
764 rt
->rt6i_flags
|= RTF_EXPIRES
;
767 dst_release(&rt
->u
.dst
);
773 #ifdef CONFIG_IPV6_PRIVACY
774 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
776 struct inet6_dev
*idev
= ifp
->idev
;
777 struct in6_addr addr
, *tmpaddr
;
778 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
784 write_lock(&idev
->lock
);
786 spin_lock_bh(&ift
->lock
);
787 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
788 spin_unlock_bh(&ift
->lock
);
795 if (idev
->cnf
.use_tempaddr
<= 0) {
796 write_unlock(&idev
->lock
);
798 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
803 spin_lock_bh(&ifp
->lock
);
804 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
805 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
806 spin_unlock_bh(&ifp
->lock
);
807 write_unlock(&idev
->lock
);
809 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
815 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
816 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
817 spin_unlock_bh(&ifp
->lock
);
818 write_unlock(&idev
->lock
);
820 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
826 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
827 tmp_valid_lft
= min_t(__u32
,
829 idev
->cnf
.temp_valid_lft
);
830 tmp_prefered_lft
= min_t(__u32
,
832 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
833 tmp_plen
= ifp
->prefix_len
;
834 max_addresses
= idev
->cnf
.max_addresses
;
835 tmp_cstamp
= ifp
->cstamp
;
836 tmp_tstamp
= ifp
->tstamp
;
837 spin_unlock_bh(&ifp
->lock
);
839 write_unlock(&idev
->lock
);
841 addr_flags
= IFA_F_TEMPORARY
;
842 /* set in addrconf_prefix_rcv() */
843 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
844 addr_flags
|= IFA_F_OPTIMISTIC
;
846 ift
= !max_addresses
||
847 ipv6_count_addresses(idev
) < max_addresses
?
848 ipv6_add_addr(idev
, &addr
, tmp_plen
,
849 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
851 if (!ift
|| IS_ERR(ift
)) {
855 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
857 write_lock(&idev
->lock
);
861 spin_lock_bh(&ift
->lock
);
863 ift
->valid_lft
= tmp_valid_lft
;
864 ift
->prefered_lft
= tmp_prefered_lft
;
865 ift
->cstamp
= tmp_cstamp
;
866 ift
->tstamp
= tmp_tstamp
;
867 spin_unlock_bh(&ift
->lock
);
869 addrconf_dad_start(ift
, 0);
878 * Choose an appropriate source address (RFC3484)
880 struct ipv6_saddr_score
{
888 #define IPV6_SADDR_SCORE_LOCAL 0x0001
889 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
890 #define IPV6_SADDR_SCORE_HOA 0x0008
891 #define IPV6_SADDR_SCORE_OIF 0x0010
892 #define IPV6_SADDR_SCORE_LABEL 0x0020
893 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
895 static inline int ipv6_saddr_preferred(int type
)
897 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
898 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
903 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
904 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
906 struct ipv6_saddr_score hiscore
;
907 struct inet6_ifaddr
*ifa_result
= NULL
;
908 struct net
*net
= daddr_dev
->nd_net
;
909 int daddr_type
= __ipv6_addr_type(daddr
);
910 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
911 int daddr_ifindex
= daddr_dev
? daddr_dev
->ifindex
: 0;
912 u32 daddr_label
= ipv6_addr_label(daddr
, daddr_type
, daddr_ifindex
);
913 struct net_device
*dev
;
915 memset(&hiscore
, 0, sizeof(hiscore
));
917 read_lock(&dev_base_lock
);
920 for_each_netdev(net
, dev
) {
921 struct inet6_dev
*idev
;
922 struct inet6_ifaddr
*ifa
;
924 /* Rule 0: Candidate Source Address (section 4)
925 * - multicast and link-local destination address,
926 * the set of candidate source address MUST only
927 * include addresses assigned to interfaces
928 * belonging to the same link as the outgoing
930 * (- For site-local destination addresses, the
931 * set of candidate source addresses MUST only
932 * include addresses assigned to interfaces
933 * belonging to the same site as the outgoing
936 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
937 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
938 daddr_dev
&& dev
!= daddr_dev
)
941 idev
= __in6_dev_get(dev
);
945 read_lock_bh(&idev
->lock
);
946 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
947 struct ipv6_saddr_score score
;
949 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
952 * - Tentative Address (RFC2462 section 5.4)
953 * - A tentative address is not considered
954 * "assigned to an interface" in the traditional
955 * sense, unless it is also flagged as optimistic.
956 * - Candidate Source Address (section 4)
957 * - In any case, anycast addresses, multicast
958 * addresses, and the unspecified address MUST
959 * NOT be included in a candidate set.
961 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
962 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
964 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
965 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
966 LIMIT_NETDEBUG(KERN_DEBUG
967 "ADDRCONF: unspecified / multicast address "
968 "assigned as unicast address on %s",
978 if (ifa_result
== NULL
) {
979 /* record it if the first available entry */
983 /* Rule 1: Prefer same address */
984 if (hiscore
.rule
< 1) {
985 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
986 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
989 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
990 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
991 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
996 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
1000 /* Rule 2: Prefer appropriate scope */
1001 if (hiscore
.rule
< 2) {
1002 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
1005 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
1006 if (hiscore
.scope
< score
.scope
) {
1007 if (hiscore
.scope
< daddr_scope
) {
1012 } else if (score
.scope
< hiscore
.scope
) {
1013 if (score
.scope
< daddr_scope
)
1014 break; /* addresses sorted by scope */
1021 /* Rule 3: Avoid deprecated and optimistic addresses */
1022 if (hiscore
.rule
< 3) {
1023 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1024 (((ifa_result
->flags
&
1025 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1026 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1029 if (ipv6_saddr_preferred(score
.addr_type
) ||
1031 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1032 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1033 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1038 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1042 /* Rule 4: Prefer home address */
1043 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1044 if (hiscore
.rule
< 4) {
1045 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1046 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1049 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1050 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1051 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1056 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1060 if (hiscore
.rule
< 4)
1064 /* Rule 5: Prefer outgoing interface */
1065 if (hiscore
.rule
< 5) {
1066 if (daddr_dev
== NULL
||
1067 daddr_dev
== ifa_result
->idev
->dev
)
1068 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1071 if (daddr_dev
== NULL
||
1072 daddr_dev
== ifa
->idev
->dev
) {
1073 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1074 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1079 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1083 /* Rule 6: Prefer matching label */
1084 if (hiscore
.rule
< 6) {
1085 if (ipv6_addr_label(&ifa_result
->addr
,
1087 ifa_result
->idev
->dev
->ifindex
) == daddr_label
)
1088 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1091 if (ipv6_addr_label(&ifa
->addr
,
1093 ifa
->idev
->dev
->ifindex
) == daddr_label
) {
1094 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1095 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1100 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1104 #ifdef CONFIG_IPV6_PRIVACY
1105 /* Rule 7: Prefer public address
1106 * Note: prefer temprary address if use_tempaddr >= 2
1108 if (hiscore
.rule
< 7) {
1109 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1110 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1111 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1114 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1115 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1116 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1117 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1122 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1126 if (hiscore
.rule
< 7)
1130 /* Skip rule 8 for orchid -> non-orchid address pairs. */
1131 if (ipv6_addr_orchid(&ifa
->addr
) && !ipv6_addr_orchid(daddr
))
1134 /* Rule 8: Use longest matching prefix */
1135 if (hiscore
.rule
< 8) {
1136 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1139 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1140 if (score
.matchlen
> hiscore
.matchlen
) {
1145 else if (score
.matchlen
< hiscore
.matchlen
)
1149 /* Final Rule: choose first available one */
1153 in6_ifa_put(ifa_result
);
1158 read_unlock_bh(&idev
->lock
);
1161 read_unlock(&dev_base_lock
);
1164 return -EADDRNOTAVAIL
;
1166 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1167 in6_ifa_put(ifa_result
);
1171 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1173 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1174 unsigned char banned_flags
)
1176 struct inet6_dev
*idev
;
1177 int err
= -EADDRNOTAVAIL
;
1180 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1181 struct inet6_ifaddr
*ifp
;
1183 read_lock_bh(&idev
->lock
);
1184 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1185 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1186 ipv6_addr_copy(addr
, &ifp
->addr
);
1191 read_unlock_bh(&idev
->lock
);
1197 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1200 struct inet6_ifaddr
*ifp
;
1202 read_lock_bh(&idev
->lock
);
1203 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1205 read_unlock_bh(&idev
->lock
);
1209 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1210 struct net_device
*dev
, int strict
)
1212 struct inet6_ifaddr
* ifp
;
1213 u8 hash
= ipv6_addr_hash(addr
);
1215 read_lock_bh(&addrconf_hash_lock
);
1216 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1217 if (ifp
->idev
->dev
->nd_net
!= net
)
1219 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1220 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1221 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1222 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1226 read_unlock_bh(&addrconf_hash_lock
);
1229 EXPORT_SYMBOL(ipv6_chk_addr
);
1232 int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1233 struct net_device
*dev
)
1235 struct inet6_ifaddr
* ifp
;
1236 u8 hash
= ipv6_addr_hash(addr
);
1238 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1239 if (ifp
->idev
->dev
->nd_net
!= net
)
1241 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1242 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1249 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, struct in6_addr
*addr
,
1250 struct net_device
*dev
, int strict
)
1252 struct inet6_ifaddr
* ifp
;
1253 u8 hash
= ipv6_addr_hash(addr
);
1255 read_lock_bh(&addrconf_hash_lock
);
1256 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1257 if (ifp
->idev
->dev
->nd_net
!= net
)
1259 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1260 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1261 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1267 read_unlock_bh(&addrconf_hash_lock
);
1272 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1274 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1275 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1276 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1277 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1278 int sk_ipv6only
= ipv6_only_sock(sk
);
1279 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1280 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1281 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1283 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1286 if (addr_type2
== IPV6_ADDR_ANY
&&
1287 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1290 if (addr_type
== IPV6_ADDR_ANY
&&
1291 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1294 if (sk2_rcv_saddr6
&&
1295 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1298 if (addr_type
== IPV6_ADDR_MAPPED
&&
1300 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1306 /* Gets referenced address, destroys ifaddr */
1308 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1310 if (ifp
->flags
&IFA_F_PERMANENT
) {
1311 spin_lock_bh(&ifp
->lock
);
1312 addrconf_del_timer(ifp
);
1313 ifp
->flags
|= IFA_F_TENTATIVE
;
1314 spin_unlock_bh(&ifp
->lock
);
1316 #ifdef CONFIG_IPV6_PRIVACY
1317 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1318 struct inet6_ifaddr
*ifpub
;
1319 spin_lock_bh(&ifp
->lock
);
1322 in6_ifa_hold(ifpub
);
1323 spin_unlock_bh(&ifp
->lock
);
1324 ipv6_create_tempaddr(ifpub
, ifp
);
1327 spin_unlock_bh(&ifp
->lock
);
1335 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1337 if (net_ratelimit())
1338 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1339 addrconf_dad_stop(ifp
);
1342 /* Join to solicited addr multicast group. */
1344 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1346 struct in6_addr maddr
;
1348 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1351 addrconf_addr_solict_mult(addr
, &maddr
);
1352 ipv6_dev_mc_inc(dev
, &maddr
);
1355 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1357 struct in6_addr maddr
;
1359 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1362 addrconf_addr_solict_mult(addr
, &maddr
);
1363 __ipv6_dev_mc_dec(idev
, &maddr
);
1366 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1368 struct in6_addr addr
;
1369 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1370 if (ipv6_addr_any(&addr
))
1372 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1375 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1377 struct in6_addr addr
;
1378 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1379 if (ipv6_addr_any(&addr
))
1381 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1384 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1386 if (dev
->addr_len
!= ETH_ALEN
)
1388 memcpy(eui
, dev
->dev_addr
, 3);
1389 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1392 * The zSeries OSA network cards can be shared among various
1393 * OS instances, but the OSA cards have only one MAC address.
1394 * This leads to duplicate address conflicts in conjunction
1395 * with IPv6 if more than one instance uses the same card.
1397 * The driver for these cards can deliver a unique 16-bit
1398 * identifier for each instance sharing the same card. It is
1399 * placed instead of 0xFFFE in the interface identifier. The
1400 * "u" bit of the interface identifier is not inverted in this
1401 * case. Hence the resulting interface identifier has local
1402 * scope according to RFC2373.
1405 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1406 eui
[4] = dev
->dev_id
& 0xFF;
1415 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1417 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1418 if (dev
->addr_len
!= ARCNET_ALEN
)
1421 eui
[7] = *(u8
*)dev
->dev_addr
;
1425 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1427 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1429 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1434 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1436 switch (dev
->type
) {
1439 case ARPHRD_IEEE802_TR
:
1440 return addrconf_ifid_eui48(eui
, dev
);
1442 return addrconf_ifid_arcnet(eui
, dev
);
1443 case ARPHRD_INFINIBAND
:
1444 return addrconf_ifid_infiniband(eui
, dev
);
1446 if (dev
->priv_flags
& IFF_ISATAP
)
1447 return ipv6_isatap_eui64(eui
, *(__be32
*)dev
->dev_addr
);
1452 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1455 struct inet6_ifaddr
*ifp
;
1457 read_lock_bh(&idev
->lock
);
1458 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1459 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1460 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1465 read_unlock_bh(&idev
->lock
);
1469 #ifdef CONFIG_IPV6_PRIVACY
1470 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1471 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1474 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1475 idev
->rndid
[0] &= ~0x02;
1478 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1479 * check if generated address is not inappropriate
1481 * - Reserved subnet anycast (RFC 2526)
1482 * 11111101 11....11 1xxxxxxx
1483 * - ISATAP (RFC4214) 6.1
1484 * 00-00-5E-FE-xx-xx-xx-xx
1486 * - XXX: already assigned to an address on the device
1488 if (idev
->rndid
[0] == 0xfd &&
1489 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1490 (idev
->rndid
[7]&0x80))
1492 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1493 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1495 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1502 static void ipv6_regen_rndid(unsigned long data
)
1504 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1505 unsigned long expires
;
1508 write_lock_bh(&idev
->lock
);
1513 if (__ipv6_regen_rndid(idev
) < 0)
1517 idev
->cnf
.temp_prefered_lft
* HZ
-
1518 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1519 if (time_before(expires
, jiffies
)) {
1521 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1526 if (!mod_timer(&idev
->regen_timer
, expires
))
1530 write_unlock_bh(&idev
->lock
);
1531 rcu_read_unlock_bh();
1535 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1538 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1539 ret
= __ipv6_regen_rndid(idev
);
1549 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1550 unsigned long expires
, u32 flags
)
1552 struct fib6_config cfg
= {
1553 .fc_table
= RT6_TABLE_PREFIX
,
1554 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1555 .fc_ifindex
= dev
->ifindex
,
1556 .fc_expires
= expires
,
1558 .fc_flags
= RTF_UP
| flags
,
1559 .fc_nlinfo
.nl_net
= dev
->nd_net
,
1562 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1564 /* Prevent useless cloning on PtP SIT.
1565 This thing is done here expecting that the whole
1566 class of non-broadcast devices need not cloning.
1568 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1569 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1570 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1573 ip6_route_add(&cfg
);
1576 /* Create "default" multicast route to the interface */
1578 static void addrconf_add_mroute(struct net_device
*dev
)
1580 struct fib6_config cfg
= {
1581 .fc_table
= RT6_TABLE_LOCAL
,
1582 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1583 .fc_ifindex
= dev
->ifindex
,
1586 .fc_nlinfo
.nl_net
= dev
->nd_net
,
1589 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1591 ip6_route_add(&cfg
);
1594 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1595 static void sit_route_add(struct net_device
*dev
)
1597 struct fib6_config cfg
= {
1598 .fc_table
= RT6_TABLE_MAIN
,
1599 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1600 .fc_ifindex
= dev
->ifindex
,
1602 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1603 .fc_nlinfo
.nl_net
= dev
->nd_net
,
1606 /* prefix length - 96 bits "::d.d.d.d" */
1607 ip6_route_add(&cfg
);
1611 static void addrconf_add_lroute(struct net_device
*dev
)
1613 struct in6_addr addr
;
1615 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1616 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1619 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1621 struct inet6_dev
*idev
;
1625 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1628 /* Add default multicast route */
1629 addrconf_add_mroute(dev
);
1631 /* Add link local route */
1632 addrconf_add_lroute(dev
);
1636 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1638 struct prefix_info
*pinfo
;
1642 unsigned long rt_expires
;
1643 struct inet6_dev
*in6_dev
;
1645 pinfo
= (struct prefix_info
*) opt
;
1647 if (len
< sizeof(struct prefix_info
)) {
1648 ADBG(("addrconf: prefix option too short\n"));
1653 * Validation checks ([ADDRCONF], page 19)
1656 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1658 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1661 valid_lft
= ntohl(pinfo
->valid
);
1662 prefered_lft
= ntohl(pinfo
->prefered
);
1664 if (prefered_lft
> valid_lft
) {
1665 if (net_ratelimit())
1666 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1670 in6_dev
= in6_dev_get(dev
);
1672 if (in6_dev
== NULL
) {
1673 if (net_ratelimit())
1674 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1679 * Two things going on here:
1680 * 1) Add routes for on-link prefixes
1681 * 2) Configure prefixes with the auto flag set
1684 /* Avoid arithmetic overflow. Really, we could
1685 save rt_expires in seconds, likely valid_lft,
1686 but it would require division in fib gc, that it
1689 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1690 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1692 rt_expires
= valid_lft
* HZ
;
1695 * We convert this (in jiffies) to clock_t later.
1696 * Avoid arithmetic overflow there as well.
1697 * Overflow can happen only if HZ < USER_HZ.
1699 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1700 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1702 if (pinfo
->onlink
) {
1703 struct rt6_info
*rt
;
1704 rt
= rt6_lookup(dev
->nd_net
, &pinfo
->prefix
, NULL
,
1707 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1708 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1709 if (valid_lft
== 0) {
1713 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1716 } else if (valid_lft
) {
1717 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1718 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1721 dst_release(&rt
->u
.dst
);
1724 /* Try to figure out our local address for this prefix */
1726 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1727 struct inet6_ifaddr
* ifp
;
1728 struct in6_addr addr
;
1729 int create
= 0, update_lft
= 0;
1731 if (pinfo
->prefix_len
== 64) {
1732 memcpy(&addr
, &pinfo
->prefix
, 8);
1733 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1734 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1735 in6_dev_put(in6_dev
);
1740 if (net_ratelimit())
1741 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1743 in6_dev_put(in6_dev
);
1748 ifp
= ipv6_get_ifaddr(dev
->nd_net
, &addr
, dev
, 1);
1750 if (ifp
== NULL
&& valid_lft
) {
1751 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1754 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1755 if (in6_dev
->cnf
.optimistic_dad
&&
1756 !ipv6_devconf
.forwarding
)
1757 addr_flags
= IFA_F_OPTIMISTIC
;
1760 /* Do not allow to create too much of autoconfigured
1761 * addresses; this would be too easy way to crash kernel.
1763 if (!max_addresses
||
1764 ipv6_count_addresses(in6_dev
) < max_addresses
)
1765 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1766 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1769 if (!ifp
|| IS_ERR(ifp
)) {
1770 in6_dev_put(in6_dev
);
1774 update_lft
= create
= 1;
1775 ifp
->cstamp
= jiffies
;
1776 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1782 #ifdef CONFIG_IPV6_PRIVACY
1783 struct inet6_ifaddr
*ift
;
1787 /* update lifetime (RFC2462 5.5.3 e) */
1788 spin_lock(&ifp
->lock
);
1790 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1791 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1794 if (!update_lft
&& stored_lft
) {
1795 if (valid_lft
> MIN_VALID_LIFETIME
||
1796 valid_lft
> stored_lft
)
1798 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1799 /* valid_lft <= stored_lft is always true */
1803 valid_lft
= MIN_VALID_LIFETIME
;
1804 if (valid_lft
< prefered_lft
)
1805 prefered_lft
= valid_lft
;
1811 ifp
->valid_lft
= valid_lft
;
1812 ifp
->prefered_lft
= prefered_lft
;
1815 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1816 spin_unlock(&ifp
->lock
);
1818 if (!(flags
&IFA_F_TENTATIVE
))
1819 ipv6_ifa_notify(0, ifp
);
1821 spin_unlock(&ifp
->lock
);
1823 #ifdef CONFIG_IPV6_PRIVACY
1824 read_lock_bh(&in6_dev
->lock
);
1825 /* update all temporary addresses in the list */
1826 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1828 * When adjusting the lifetimes of an existing
1829 * temporary address, only lower the lifetimes.
1830 * Implementations must not increase the
1831 * lifetimes of an existing temporary address
1832 * when processing a Prefix Information Option.
1834 spin_lock(&ift
->lock
);
1836 if (ift
->valid_lft
> valid_lft
&&
1837 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1838 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1839 if (ift
->prefered_lft
> prefered_lft
&&
1840 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1841 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1842 spin_unlock(&ift
->lock
);
1843 if (!(flags
&IFA_F_TENTATIVE
))
1844 ipv6_ifa_notify(0, ift
);
1847 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1849 * When a new public address is created as described in [ADDRCONF],
1850 * also create a new temporary address.
1852 read_unlock_bh(&in6_dev
->lock
);
1853 ipv6_create_tempaddr(ifp
, NULL
);
1855 read_unlock_bh(&in6_dev
->lock
);
1862 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1863 in6_dev_put(in6_dev
);
1867 * Set destination address.
1868 * Special case for SIT interfaces where we create a new "virtual"
1871 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
1873 struct in6_ifreq ireq
;
1874 struct net_device
*dev
;
1880 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1883 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
1889 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1890 if (dev
->type
== ARPHRD_SIT
) {
1893 struct ip_tunnel_parm p
;
1895 err
= -EADDRNOTAVAIL
;
1896 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1899 memset(&p
, 0, sizeof(p
));
1900 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1904 p
.iph
.protocol
= IPPROTO_IPV6
;
1906 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
1908 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1909 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1914 dev
= __dev_get_by_name(net
, p
.name
);
1917 err
= dev_open(dev
);
1928 * Manual configuration of address on an interface
1930 static int inet6_addr_add(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
1931 int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
1934 struct inet6_ifaddr
*ifp
;
1935 struct inet6_dev
*idev
;
1936 struct net_device
*dev
;
1938 u32 flags
= RTF_EXPIRES
;
1942 /* check the lifetime */
1943 if (!valid_lft
|| prefered_lft
> valid_lft
)
1946 dev
= __dev_get_by_index(net
, ifindex
);
1950 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1953 scope
= ipv6_addr_scope(pfx
);
1955 if (valid_lft
== INFINITY_LIFE_TIME
) {
1956 ifa_flags
|= IFA_F_PERMANENT
;
1958 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1959 valid_lft
= 0x7FFFFFFF/HZ
;
1961 if (prefered_lft
== 0)
1962 ifa_flags
|= IFA_F_DEPRECATED
;
1963 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1964 (prefered_lft
!= INFINITY_LIFE_TIME
))
1965 prefered_lft
= 0x7FFFFFFF/HZ
;
1967 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1970 spin_lock_bh(&ifp
->lock
);
1971 ifp
->valid_lft
= valid_lft
;
1972 ifp
->prefered_lft
= prefered_lft
;
1973 ifp
->tstamp
= jiffies
;
1974 spin_unlock_bh(&ifp
->lock
);
1976 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1977 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1979 * Note that section 3.1 of RFC 4429 indicates
1980 * that the Optimistic flag should not be set for
1981 * manually configured addresses
1983 addrconf_dad_start(ifp
, 0);
1989 return PTR_ERR(ifp
);
1992 static int inet6_addr_del(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
1995 struct inet6_ifaddr
*ifp
;
1996 struct inet6_dev
*idev
;
1997 struct net_device
*dev
;
1999 dev
= __dev_get_by_index(net
, ifindex
);
2003 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2006 read_lock_bh(&idev
->lock
);
2007 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
2008 if (ifp
->prefix_len
== plen
&&
2009 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2011 read_unlock_bh(&idev
->lock
);
2015 /* If the last address is deleted administratively,
2016 disable IPv6 on this interface.
2018 if (idev
->addr_list
== NULL
)
2019 addrconf_ifdown(idev
->dev
, 1);
2023 read_unlock_bh(&idev
->lock
);
2024 return -EADDRNOTAVAIL
;
2028 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2030 struct in6_ifreq ireq
;
2033 if (!capable(CAP_NET_ADMIN
))
2036 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2040 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2041 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2042 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2047 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2049 struct in6_ifreq ireq
;
2052 if (!capable(CAP_NET_ADMIN
))
2055 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2059 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2060 ireq
.ifr6_prefixlen
);
2065 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2066 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2068 struct inet6_ifaddr
* ifp
;
2069 struct in6_addr addr
;
2070 struct net_device
*dev
;
2071 struct net
*net
= idev
->dev
->nd_net
;
2076 memset(&addr
, 0, sizeof(struct in6_addr
));
2077 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2079 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2080 addr
.s6_addr32
[0] = htonl(0xfe800000);
2083 scope
= IPV6_ADDR_COMPATv4
;
2086 if (addr
.s6_addr32
[3]) {
2087 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2089 spin_lock_bh(&ifp
->lock
);
2090 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2091 spin_unlock_bh(&ifp
->lock
);
2092 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2098 for_each_netdev(net
, dev
) {
2099 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2100 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2101 struct in_ifaddr
* ifa
;
2105 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2108 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2110 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2112 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2113 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2117 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2122 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2125 spin_lock_bh(&ifp
->lock
);
2126 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2127 spin_unlock_bh(&ifp
->lock
);
2128 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2137 static void init_loopback(struct net_device
*dev
)
2139 struct inet6_dev
*idev
;
2140 struct inet6_ifaddr
* ifp
;
2146 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2147 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2151 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2153 spin_lock_bh(&ifp
->lock
);
2154 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2155 spin_unlock_bh(&ifp
->lock
);
2156 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2161 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2163 struct inet6_ifaddr
* ifp
;
2164 u32 addr_flags
= IFA_F_PERMANENT
;
2166 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2167 if (idev
->cnf
.optimistic_dad
&&
2168 !ipv6_devconf
.forwarding
)
2169 addr_flags
|= IFA_F_OPTIMISTIC
;
2173 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2175 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2176 addrconf_dad_start(ifp
, 0);
2181 static void addrconf_dev_config(struct net_device
*dev
)
2183 struct in6_addr addr
;
2184 struct inet6_dev
* idev
;
2188 if ((dev
->type
!= ARPHRD_ETHER
) &&
2189 (dev
->type
!= ARPHRD_FDDI
) &&
2190 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2191 (dev
->type
!= ARPHRD_ARCNET
) &&
2192 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2193 /* Alas, we support only Ethernet autoconfiguration. */
2197 idev
= addrconf_add_dev(dev
);
2201 memset(&addr
, 0, sizeof(struct in6_addr
));
2202 addr
.s6_addr32
[0] = htonl(0xFE800000);
2204 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2205 addrconf_add_linklocal(idev
, &addr
);
2208 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2209 static void addrconf_sit_config(struct net_device
*dev
)
2211 struct inet6_dev
*idev
;
2216 * Configure the tunnel with one of our IPv4
2217 * addresses... we should configure all of
2218 * our v4 addrs in the tunnel
2221 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2222 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2226 if (dev
->priv_flags
& IFF_ISATAP
) {
2227 struct in6_addr addr
;
2229 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2230 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2231 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2232 addrconf_add_linklocal(idev
, &addr
);
2236 sit_add_v4_addrs(idev
);
2238 if (dev
->flags
&IFF_POINTOPOINT
) {
2239 addrconf_add_mroute(dev
);
2240 addrconf_add_lroute(dev
);
2247 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2249 struct in6_addr lladdr
;
2251 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2252 addrconf_add_linklocal(idev
, &lladdr
);
2258 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2260 struct net_device
*link_dev
;
2261 struct net
*net
= idev
->dev
->nd_net
;
2263 /* first try to inherit the link-local address from the link device */
2264 if (idev
->dev
->iflink
&&
2265 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2266 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2269 /* then try to inherit it from any device */
2270 for_each_netdev(net
, link_dev
) {
2271 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2274 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2278 * Autoconfigure tunnel with a link-local address so routing protocols,
2279 * DHCPv6, MLD etc. can be run over the virtual link
2282 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2284 struct inet6_dev
*idev
;
2288 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2289 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2292 ip6_tnl_add_linklocal(idev
);
2295 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2298 struct net_device
*dev
= (struct net_device
*) data
;
2299 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2300 int run_pending
= 0;
2304 case NETDEV_REGISTER
:
2305 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2306 idev
= ipv6_add_dev(dev
);
2308 return notifier_from_errno(-ENOMEM
);
2313 if (dev
->flags
& IFF_SLAVE
)
2316 if (event
== NETDEV_UP
) {
2317 if (!addrconf_qdisc_ok(dev
)) {
2318 /* device is not ready yet. */
2320 "ADDRCONF(NETDEV_UP): %s: "
2321 "link is not ready\n",
2326 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2327 idev
= ipv6_add_dev(dev
);
2330 idev
->if_flags
|= IF_READY
;
2332 if (!addrconf_qdisc_ok(dev
)) {
2333 /* device is still not ready. */
2338 if (idev
->if_flags
& IF_READY
) {
2339 /* device is already configured. */
2342 idev
->if_flags
|= IF_READY
;
2346 "ADDRCONF(NETDEV_CHANGE): %s: "
2347 "link becomes ready\n",
2354 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2356 addrconf_sit_config(dev
);
2359 case ARPHRD_TUNNEL6
:
2360 addrconf_ip6_tnl_config(dev
);
2362 case ARPHRD_LOOPBACK
:
2367 addrconf_dev_config(dev
);
2372 addrconf_dad_run(idev
);
2374 /* If the MTU changed during the interface down, when the
2375 interface up, the changed MTU must be reflected in the
2376 idev as well as routers.
2378 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2379 rt6_mtu_change(dev
, dev
->mtu
);
2380 idev
->cnf
.mtu6
= dev
->mtu
;
2382 idev
->tstamp
= jiffies
;
2383 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2384 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2385 stop IPv6 on this interface.
2387 if (dev
->mtu
< IPV6_MIN_MTU
)
2388 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2392 case NETDEV_CHANGEMTU
:
2393 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2394 rt6_mtu_change(dev
, dev
->mtu
);
2395 idev
->cnf
.mtu6
= dev
->mtu
;
2399 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2400 idev
= ipv6_add_dev(dev
);
2405 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2408 case NETDEV_UNREGISTER
:
2410 * Remove all addresses from this interface.
2412 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2415 case NETDEV_CHANGENAME
:
2417 snmp6_unregister_dev(idev
);
2418 addrconf_sysctl_unregister(idev
);
2419 addrconf_sysctl_register(idev
);
2420 err
= snmp6_register_dev(idev
);
2422 return notifier_from_errno(err
);
2431 * addrconf module should be notified of a device going up
2433 static struct notifier_block ipv6_dev_notf
= {
2434 .notifier_call
= addrconf_notify
,
2438 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2440 struct inet6_dev
*idev
;
2441 struct inet6_ifaddr
*ifa
, **bifa
;
2442 struct net
*net
= dev
->nd_net
;
2447 if (dev
== init_net
.loopback_dev
&& how
== 1)
2450 rt6_ifdown(net
, dev
);
2451 neigh_ifdown(&nd_tbl
, dev
);
2453 idev
= __in6_dev_get(dev
);
2457 /* Step 1: remove reference to ipv6 device from parent device.
2463 /* protected by rtnl_lock */
2464 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2466 /* Step 1.5: remove snmp6 entry */
2467 snmp6_unregister_dev(idev
);
2471 /* Step 2: clear hash table */
2472 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2473 bifa
= &inet6_addr_lst
[i
];
2475 write_lock_bh(&addrconf_hash_lock
);
2476 while ((ifa
= *bifa
) != NULL
) {
2477 if (ifa
->idev
== idev
) {
2478 *bifa
= ifa
->lst_next
;
2479 ifa
->lst_next
= NULL
;
2480 addrconf_del_timer(ifa
);
2484 bifa
= &ifa
->lst_next
;
2486 write_unlock_bh(&addrconf_hash_lock
);
2489 write_lock_bh(&idev
->lock
);
2491 /* Step 3: clear flags for stateless addrconf */
2493 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2495 /* Step 4: clear address list */
2496 #ifdef CONFIG_IPV6_PRIVACY
2497 if (how
== 1 && del_timer(&idev
->regen_timer
))
2500 /* clear tempaddr list */
2501 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2502 idev
->tempaddr_list
= ifa
->tmp_next
;
2503 ifa
->tmp_next
= NULL
;
2505 write_unlock_bh(&idev
->lock
);
2506 spin_lock_bh(&ifa
->lock
);
2509 in6_ifa_put(ifa
->ifpub
);
2512 spin_unlock_bh(&ifa
->lock
);
2514 write_lock_bh(&idev
->lock
);
2517 while ((ifa
= idev
->addr_list
) != NULL
) {
2518 idev
->addr_list
= ifa
->if_next
;
2519 ifa
->if_next
= NULL
;
2521 addrconf_del_timer(ifa
);
2522 write_unlock_bh(&idev
->lock
);
2524 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2525 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2528 write_lock_bh(&idev
->lock
);
2530 write_unlock_bh(&idev
->lock
);
2532 /* Step 5: Discard multicast list */
2535 ipv6_mc_destroy_dev(idev
);
2539 idev
->tstamp
= jiffies
;
2541 /* Shot the device (if unregistered) */
2544 addrconf_sysctl_unregister(idev
);
2545 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2546 neigh_ifdown(&nd_tbl
, dev
);
2552 static void addrconf_rs_timer(unsigned long data
)
2554 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2556 if (ifp
->idev
->cnf
.forwarding
)
2559 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2561 * Announcement received after solicitation
2567 spin_lock(&ifp
->lock
);
2568 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2569 struct in6_addr all_routers
;
2571 /* The wait after the last probe can be shorter */
2572 addrconf_mod_timer(ifp
, AC_RS
,
2573 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2574 ifp
->idev
->cnf
.rtr_solicit_delay
:
2575 ifp
->idev
->cnf
.rtr_solicit_interval
);
2576 spin_unlock(&ifp
->lock
);
2578 ipv6_addr_all_routers(&all_routers
);
2580 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2582 spin_unlock(&ifp
->lock
);
2584 * Note: we do not support deprecated "all on-link"
2585 * assumption any longer.
2587 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2588 ifp
->idev
->dev
->name
);
2596 * Duplicate Address Detection
2598 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2600 unsigned long rand_num
;
2601 struct inet6_dev
*idev
= ifp
->idev
;
2603 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2606 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2608 ifp
->probes
= idev
->cnf
.dad_transmits
;
2609 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2612 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2614 struct inet6_dev
*idev
= ifp
->idev
;
2615 struct net_device
*dev
= idev
->dev
;
2617 addrconf_join_solict(dev
, &ifp
->addr
);
2619 net_srandom(ifp
->addr
.s6_addr32
[3]);
2621 read_lock_bh(&idev
->lock
);
2624 spin_lock_bh(&ifp
->lock
);
2626 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2627 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2628 ifp
->flags
& IFA_F_NODAD
) {
2629 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2630 spin_unlock_bh(&ifp
->lock
);
2631 read_unlock_bh(&idev
->lock
);
2633 addrconf_dad_completed(ifp
);
2637 if (!(idev
->if_flags
& IF_READY
)) {
2638 spin_unlock_bh(&ifp
->lock
);
2639 read_unlock_bh(&idev
->lock
);
2641 * If the defice is not ready:
2642 * - keep it tentative if it is a permanent address.
2643 * - otherwise, kill it.
2646 addrconf_dad_stop(ifp
);
2651 * Optimistic nodes can start receiving
2654 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2655 ip6_ins_rt(ifp
->rt
);
2657 addrconf_dad_kick(ifp
);
2658 spin_unlock_bh(&ifp
->lock
);
2660 read_unlock_bh(&idev
->lock
);
2663 static void addrconf_dad_timer(unsigned long data
)
2665 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2666 struct inet6_dev
*idev
= ifp
->idev
;
2667 struct in6_addr unspec
;
2668 struct in6_addr mcaddr
;
2670 read_lock_bh(&idev
->lock
);
2672 read_unlock_bh(&idev
->lock
);
2675 spin_lock_bh(&ifp
->lock
);
2676 if (ifp
->probes
== 0) {
2678 * DAD was successful
2681 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2682 spin_unlock_bh(&ifp
->lock
);
2683 read_unlock_bh(&idev
->lock
);
2685 addrconf_dad_completed(ifp
);
2691 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2692 spin_unlock_bh(&ifp
->lock
);
2693 read_unlock_bh(&idev
->lock
);
2695 /* send a neighbour solicitation for our addr */
2696 memset(&unspec
, 0, sizeof(unspec
));
2697 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2698 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2703 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2705 struct net_device
* dev
= ifp
->idev
->dev
;
2708 * Configure the address for reception. Now it is valid.
2711 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2713 /* If added prefix is link local and forwarding is off,
2714 start sending router solicitations.
2717 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2718 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2719 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2720 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2721 struct in6_addr all_routers
;
2723 ipv6_addr_all_routers(&all_routers
);
2726 * If a host as already performed a random delay
2727 * [...] as part of DAD [...] there is no need
2728 * to delay again before sending the first RS
2730 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2732 spin_lock_bh(&ifp
->lock
);
2734 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2735 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2736 spin_unlock_bh(&ifp
->lock
);
2740 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2741 struct inet6_ifaddr
*ifp
;
2743 read_lock_bh(&idev
->lock
);
2744 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2745 spin_lock_bh(&ifp
->lock
);
2746 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2747 spin_unlock_bh(&ifp
->lock
);
2750 spin_unlock_bh(&ifp
->lock
);
2751 addrconf_dad_kick(ifp
);
2753 read_unlock_bh(&idev
->lock
);
2756 #ifdef CONFIG_PROC_FS
2757 struct if6_iter_state
{
2758 struct seq_net_private p
;
2762 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2764 struct inet6_ifaddr
*ifa
= NULL
;
2765 struct if6_iter_state
*state
= seq
->private;
2766 struct net
*net
= state
->p
.net
;
2768 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2769 ifa
= inet6_addr_lst
[state
->bucket
];
2771 while (ifa
&& ifa
->idev
->dev
->nd_net
!= net
)
2772 ifa
= ifa
->lst_next
;
2779 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2781 struct if6_iter_state
*state
= seq
->private;
2782 struct net
*net
= state
->p
.net
;
2784 ifa
= ifa
->lst_next
;
2787 if (ifa
->idev
->dev
->nd_net
!= net
) {
2788 ifa
= ifa
->lst_next
;
2793 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2794 ifa
= inet6_addr_lst
[state
->bucket
];
2801 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2803 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2806 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2808 return pos
? NULL
: ifa
;
2811 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2812 __acquires(addrconf_hash_lock
)
2814 read_lock_bh(&addrconf_hash_lock
);
2815 return if6_get_idx(seq
, *pos
);
2818 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2820 struct inet6_ifaddr
*ifa
;
2822 ifa
= if6_get_next(seq
, v
);
2827 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2828 __releases(addrconf_hash_lock
)
2830 read_unlock_bh(&addrconf_hash_lock
);
2833 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2835 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2837 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2839 ifp
->idev
->dev
->ifindex
,
2843 ifp
->idev
->dev
->name
);
2847 static const struct seq_operations if6_seq_ops
= {
2848 .start
= if6_seq_start
,
2849 .next
= if6_seq_next
,
2850 .show
= if6_seq_show
,
2851 .stop
= if6_seq_stop
,
2854 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2856 return seq_open_net(inode
, file
, &if6_seq_ops
,
2857 sizeof(struct if6_iter_state
));
2860 static const struct file_operations if6_fops
= {
2861 .owner
= THIS_MODULE
,
2862 .open
= if6_seq_open
,
2864 .llseek
= seq_lseek
,
2865 .release
= seq_release_net
,
2868 static int if6_proc_net_init(struct net
*net
)
2870 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
2875 static void if6_proc_net_exit(struct net
*net
)
2877 proc_net_remove(net
, "if_inet6");
2880 static struct pernet_operations if6_proc_net_ops
= {
2881 .init
= if6_proc_net_init
,
2882 .exit
= if6_proc_net_exit
,
2885 int __init
if6_proc_init(void)
2887 return register_pernet_subsys(&if6_proc_net_ops
);
2890 void if6_proc_exit(void)
2892 unregister_pernet_subsys(&if6_proc_net_ops
);
2894 #endif /* CONFIG_PROC_FS */
2896 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2897 /* Check if address is a home address configured on any interface. */
2898 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
2901 struct inet6_ifaddr
* ifp
;
2902 u8 hash
= ipv6_addr_hash(addr
);
2903 read_lock_bh(&addrconf_hash_lock
);
2904 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2905 if (ifp
->idev
->dev
->nd_net
!= net
)
2907 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2908 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2913 read_unlock_bh(&addrconf_hash_lock
);
2919 * Periodic address status verification
2922 static void addrconf_verify(unsigned long foo
)
2924 struct inet6_ifaddr
*ifp
;
2925 unsigned long now
, next
;
2928 spin_lock_bh(&addrconf_verify_lock
);
2930 next
= now
+ ADDR_CHECK_FREQUENCY
;
2932 del_timer(&addr_chk_timer
);
2934 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2937 read_lock(&addrconf_hash_lock
);
2938 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2940 #ifdef CONFIG_IPV6_PRIVACY
2941 unsigned long regen_advance
;
2944 if (ifp
->flags
& IFA_F_PERMANENT
)
2947 spin_lock(&ifp
->lock
);
2948 age
= (now
- ifp
->tstamp
) / HZ
;
2950 #ifdef CONFIG_IPV6_PRIVACY
2951 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2952 ifp
->idev
->cnf
.dad_transmits
*
2953 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2956 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2957 age
>= ifp
->valid_lft
) {
2958 spin_unlock(&ifp
->lock
);
2960 read_unlock(&addrconf_hash_lock
);
2963 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2964 spin_unlock(&ifp
->lock
);
2966 } else if (age
>= ifp
->prefered_lft
) {
2967 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2970 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2972 ifp
->flags
|= IFA_F_DEPRECATED
;
2975 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2976 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2978 spin_unlock(&ifp
->lock
);
2982 read_unlock(&addrconf_hash_lock
);
2984 ipv6_ifa_notify(0, ifp
);
2988 #ifdef CONFIG_IPV6_PRIVACY
2989 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2990 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2991 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2992 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2993 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2994 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2995 if (!ifp
->regen_count
&& ifpub
) {
2998 in6_ifa_hold(ifpub
);
2999 spin_unlock(&ifp
->lock
);
3000 read_unlock(&addrconf_hash_lock
);
3001 spin_lock(&ifpub
->lock
);
3002 ifpub
->regen_count
= 0;
3003 spin_unlock(&ifpub
->lock
);
3004 ipv6_create_tempaddr(ifpub
, ifp
);
3009 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3010 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3011 spin_unlock(&ifp
->lock
);
3014 /* ifp->prefered_lft <= ifp->valid_lft */
3015 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3016 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3017 spin_unlock(&ifp
->lock
);
3020 read_unlock(&addrconf_hash_lock
);
3023 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
3024 add_timer(&addr_chk_timer
);
3025 spin_unlock_bh(&addrconf_verify_lock
);
3028 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3030 struct in6_addr
*pfx
= NULL
;
3033 pfx
= nla_data(addr
);
3036 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3039 pfx
= nla_data(local
);
3045 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3046 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3047 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3048 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3052 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3054 struct net
*net
= skb
->sk
->sk_net
;
3055 struct ifaddrmsg
*ifm
;
3056 struct nlattr
*tb
[IFA_MAX
+1];
3057 struct in6_addr
*pfx
;
3060 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3064 ifm
= nlmsg_data(nlh
);
3065 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3069 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3072 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3073 u32 prefered_lft
, u32 valid_lft
)
3075 u32 flags
= RTF_EXPIRES
;
3077 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3080 if (valid_lft
== INFINITY_LIFE_TIME
) {
3081 ifa_flags
|= IFA_F_PERMANENT
;
3083 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3084 valid_lft
= 0x7FFFFFFF/HZ
;
3086 if (prefered_lft
== 0)
3087 ifa_flags
|= IFA_F_DEPRECATED
;
3088 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3089 (prefered_lft
!= INFINITY_LIFE_TIME
))
3090 prefered_lft
= 0x7FFFFFFF/HZ
;
3092 spin_lock_bh(&ifp
->lock
);
3093 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3094 ifp
->tstamp
= jiffies
;
3095 ifp
->valid_lft
= valid_lft
;
3096 ifp
->prefered_lft
= prefered_lft
;
3098 spin_unlock_bh(&ifp
->lock
);
3099 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3100 ipv6_ifa_notify(0, ifp
);
3102 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3103 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3110 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3112 struct net
*net
= skb
->sk
->sk_net
;
3113 struct ifaddrmsg
*ifm
;
3114 struct nlattr
*tb
[IFA_MAX
+1];
3115 struct in6_addr
*pfx
;
3116 struct inet6_ifaddr
*ifa
;
3117 struct net_device
*dev
;
3118 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3122 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3126 ifm
= nlmsg_data(nlh
);
3127 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3131 if (tb
[IFA_CACHEINFO
]) {
3132 struct ifa_cacheinfo
*ci
;
3134 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3135 valid_lft
= ci
->ifa_valid
;
3136 preferred_lft
= ci
->ifa_prefered
;
3138 preferred_lft
= INFINITY_LIFE_TIME
;
3139 valid_lft
= INFINITY_LIFE_TIME
;
3142 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3146 /* We ignore other flags so far. */
3147 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3149 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3152 * It would be best to check for !NLM_F_CREATE here but
3153 * userspace alreay relies on not having to provide this.
3155 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3156 ifm
->ifa_prefixlen
, ifa_flags
,
3157 preferred_lft
, valid_lft
);
3160 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3161 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3164 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3171 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3172 u8 scope
, int ifindex
)
3174 struct ifaddrmsg
*ifm
;
3176 ifm
= nlmsg_data(nlh
);
3177 ifm
->ifa_family
= AF_INET6
;
3178 ifm
->ifa_prefixlen
= prefixlen
;
3179 ifm
->ifa_flags
= flags
;
3180 ifm
->ifa_scope
= scope
;
3181 ifm
->ifa_index
= ifindex
;
3184 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3185 unsigned long tstamp
, u32 preferred
, u32 valid
)
3187 struct ifa_cacheinfo ci
;
3189 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3190 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3191 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3192 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3193 ci
.ifa_prefered
= preferred
;
3194 ci
.ifa_valid
= valid
;
3196 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3199 static inline int rt_scope(int ifa_scope
)
3201 if (ifa_scope
& IFA_HOST
)
3202 return RT_SCOPE_HOST
;
3203 else if (ifa_scope
& IFA_LINK
)
3204 return RT_SCOPE_LINK
;
3205 else if (ifa_scope
& IFA_SITE
)
3206 return RT_SCOPE_SITE
;
3208 return RT_SCOPE_UNIVERSE
;
3211 static inline int inet6_ifaddr_msgsize(void)
3213 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3214 + nla_total_size(16) /* IFA_ADDRESS */
3215 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3218 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3219 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3221 struct nlmsghdr
*nlh
;
3222 u32 preferred
, valid
;
3224 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3228 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3229 ifa
->idev
->dev
->ifindex
);
3231 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3232 preferred
= ifa
->prefered_lft
;
3233 valid
= ifa
->valid_lft
;
3234 if (preferred
!= INFINITY_LIFE_TIME
) {
3235 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3237 if (valid
!= INFINITY_LIFE_TIME
)
3241 preferred
= INFINITY_LIFE_TIME
;
3242 valid
= INFINITY_LIFE_TIME
;
3245 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3246 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3247 nlmsg_cancel(skb
, nlh
);
3251 return nlmsg_end(skb
, nlh
);
3254 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3255 u32 pid
, u32 seq
, int event
, u16 flags
)
3257 struct nlmsghdr
*nlh
;
3258 u8 scope
= RT_SCOPE_UNIVERSE
;
3259 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3261 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3262 scope
= RT_SCOPE_SITE
;
3264 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3268 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3269 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3270 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3271 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3272 nlmsg_cancel(skb
, nlh
);
3276 return nlmsg_end(skb
, nlh
);
3279 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3280 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3282 struct nlmsghdr
*nlh
;
3283 u8 scope
= RT_SCOPE_UNIVERSE
;
3284 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3286 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3287 scope
= RT_SCOPE_SITE
;
3289 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3293 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3294 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3295 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3296 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3297 nlmsg_cancel(skb
, nlh
);
3301 return nlmsg_end(skb
, nlh
);
3311 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3312 enum addr_type_t type
)
3315 int s_idx
, s_ip_idx
;
3317 struct net_device
*dev
;
3318 struct inet6_dev
*idev
= NULL
;
3319 struct inet6_ifaddr
*ifa
;
3320 struct ifmcaddr6
*ifmca
;
3321 struct ifacaddr6
*ifaca
;
3322 struct net
*net
= skb
->sk
->sk_net
;
3324 s_idx
= cb
->args
[0];
3325 s_ip_idx
= ip_idx
= cb
->args
[1];
3328 for_each_netdev(net
, dev
) {
3334 if ((idev
= in6_dev_get(dev
)) == NULL
)
3336 read_lock_bh(&idev
->lock
);
3339 /* unicast address incl. temp addr */
3340 for (ifa
= idev
->addr_list
; ifa
;
3341 ifa
= ifa
->if_next
, ip_idx
++) {
3342 if (ip_idx
< s_ip_idx
)
3344 err
= inet6_fill_ifaddr(skb
, ifa
,
3345 NETLINK_CB(cb
->skb
).pid
,
3351 case MULTICAST_ADDR
:
3352 /* multicast address */
3353 for (ifmca
= idev
->mc_list
; ifmca
;
3354 ifmca
= ifmca
->next
, ip_idx
++) {
3355 if (ip_idx
< s_ip_idx
)
3357 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3358 NETLINK_CB(cb
->skb
).pid
,
3365 /* anycast address */
3366 for (ifaca
= idev
->ac_list
; ifaca
;
3367 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3368 if (ip_idx
< s_ip_idx
)
3370 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3371 NETLINK_CB(cb
->skb
).pid
,
3380 read_unlock_bh(&idev
->lock
);
3389 cb
->args
[1] = ip_idx
;
3393 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3395 enum addr_type_t type
= UNICAST_ADDR
;
3397 return inet6_dump_addr(skb
, cb
, type
);
3400 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3402 enum addr_type_t type
= MULTICAST_ADDR
;
3404 return inet6_dump_addr(skb
, cb
, type
);
3408 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3410 enum addr_type_t type
= ANYCAST_ADDR
;
3412 return inet6_dump_addr(skb
, cb
, type
);
3415 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3418 struct net
*net
= in_skb
->sk
->sk_net
;
3419 struct ifaddrmsg
*ifm
;
3420 struct nlattr
*tb
[IFA_MAX
+1];
3421 struct in6_addr
*addr
= NULL
;
3422 struct net_device
*dev
= NULL
;
3423 struct inet6_ifaddr
*ifa
;
3424 struct sk_buff
*skb
;
3427 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3431 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3437 ifm
= nlmsg_data(nlh
);
3439 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3441 if ((ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1)) == NULL
) {
3442 err
= -EADDRNOTAVAIL
;
3446 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3451 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3452 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3454 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3455 WARN_ON(err
== -EMSGSIZE
);
3459 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3466 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3468 struct sk_buff
*skb
;
3469 struct net
*net
= ifa
->idev
->dev
->nd_net
;
3472 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3476 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3478 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3479 WARN_ON(err
== -EMSGSIZE
);
3483 err
= rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3486 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3489 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3490 __s32
*array
, int bytes
)
3492 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3494 memset(array
, 0, bytes
);
3495 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3496 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3497 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3498 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3499 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3500 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3501 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3502 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3503 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3504 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3505 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3506 #ifdef CONFIG_IPV6_PRIVACY
3507 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3508 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3509 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3510 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3511 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3513 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3514 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3515 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3516 #ifdef CONFIG_IPV6_ROUTER_PREF
3517 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3518 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3519 #ifdef CONFIG_IPV6_ROUTE_INFO
3520 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3523 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3524 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3525 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3526 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3530 static inline size_t inet6_if_nlmsg_size(void)
3532 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3533 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3534 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3535 + nla_total_size(4) /* IFLA_MTU */
3536 + nla_total_size(4) /* IFLA_LINK */
3537 + nla_total_size( /* IFLA_PROTINFO */
3538 nla_total_size(4) /* IFLA_INET6_FLAGS */
3539 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3540 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3541 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3542 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3546 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3550 int pad
= bytes
- sizeof(u64
) * items
;
3553 /* Use put_unaligned() because stats may not be aligned for u64. */
3554 put_unaligned(items
, &stats
[0]);
3555 for (i
= 1; i
< items
; i
++)
3556 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3558 memset(&stats
[items
], 0, pad
);
3561 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3565 case IFLA_INET6_STATS
:
3566 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3568 case IFLA_INET6_ICMP6STATS
:
3569 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3574 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3575 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3577 struct net_device
*dev
= idev
->dev
;
3579 struct ifinfomsg
*hdr
;
3580 struct nlmsghdr
*nlh
;
3582 struct ifla_cacheinfo ci
;
3584 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3588 hdr
= nlmsg_data(nlh
);
3589 hdr
->ifi_family
= AF_INET6
;
3591 hdr
->ifi_type
= dev
->type
;
3592 hdr
->ifi_index
= dev
->ifindex
;
3593 hdr
->ifi_flags
= dev_get_flags(dev
);
3594 hdr
->ifi_change
= 0;
3596 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3599 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3601 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3602 if (dev
->ifindex
!= dev
->iflink
)
3603 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3605 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3606 if (protoinfo
== NULL
)
3607 goto nla_put_failure
;
3609 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3611 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3612 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3613 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3614 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3615 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3616 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3618 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3620 goto nla_put_failure
;
3621 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3623 /* XXX - MC not implemented */
3625 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3627 goto nla_put_failure
;
3628 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3630 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3632 goto nla_put_failure
;
3633 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3635 nla_nest_end(skb
, protoinfo
);
3636 return nlmsg_end(skb
, nlh
);
3639 nlmsg_cancel(skb
, nlh
);
3643 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3645 struct net
*net
= skb
->sk
->sk_net
;
3647 int s_idx
= cb
->args
[0];
3648 struct net_device
*dev
;
3649 struct inet6_dev
*idev
;
3651 read_lock(&dev_base_lock
);
3653 for_each_netdev(net
, dev
) {
3656 if ((idev
= in6_dev_get(dev
)) == NULL
)
3658 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3659 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3666 read_unlock(&dev_base_lock
);
3672 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3674 struct sk_buff
*skb
;
3675 struct net
*net
= idev
->dev
->nd_net
;
3678 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3682 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3684 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3685 WARN_ON(err
== -EMSGSIZE
);
3689 err
= rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3692 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3695 static inline size_t inet6_prefix_nlmsg_size(void)
3697 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3698 + nla_total_size(sizeof(struct in6_addr
))
3699 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3702 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3703 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3704 int event
, unsigned int flags
)
3706 struct prefixmsg
*pmsg
;
3707 struct nlmsghdr
*nlh
;
3708 struct prefix_cacheinfo ci
;
3710 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3714 pmsg
= nlmsg_data(nlh
);
3715 pmsg
->prefix_family
= AF_INET6
;
3716 pmsg
->prefix_pad1
= 0;
3717 pmsg
->prefix_pad2
= 0;
3718 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3719 pmsg
->prefix_len
= pinfo
->prefix_len
;
3720 pmsg
->prefix_type
= pinfo
->type
;
3721 pmsg
->prefix_pad3
= 0;
3722 pmsg
->prefix_flags
= 0;
3724 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3725 if (pinfo
->autoconf
)
3726 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3728 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3730 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3731 ci
.valid_time
= ntohl(pinfo
->valid
);
3732 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3734 return nlmsg_end(skb
, nlh
);
3737 nlmsg_cancel(skb
, nlh
);
3741 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3742 struct prefix_info
*pinfo
)
3744 struct sk_buff
*skb
;
3745 struct net
*net
= idev
->dev
->nd_net
;
3748 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3752 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3754 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3755 WARN_ON(err
== -EMSGSIZE
);
3759 err
= rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3762 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
3765 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3767 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3772 * If the address was optimistic
3773 * we inserted the route at the start of
3774 * our DAD process, so we don't need
3777 if (!(ifp
->rt
->rt6i_node
))
3778 ip6_ins_rt(ifp
->rt
);
3779 if (ifp
->idev
->cnf
.forwarding
)
3780 addrconf_join_anycast(ifp
);
3783 if (ifp
->idev
->cnf
.forwarding
)
3784 addrconf_leave_anycast(ifp
);
3785 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3786 dst_hold(&ifp
->rt
->u
.dst
);
3787 if (ip6_del_rt(ifp
->rt
))
3788 dst_free(&ifp
->rt
->u
.dst
);
3793 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3796 if (likely(ifp
->idev
->dead
== 0))
3797 __ipv6_ifa_notify(event
, ifp
);
3798 rcu_read_unlock_bh();
3801 #ifdef CONFIG_SYSCTL
3804 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3805 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3807 int *valp
= ctl
->data
;
3811 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3814 addrconf_fixup_forwarding(ctl
, valp
, val
);
3818 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3819 int __user
*name
, int nlen
,
3820 void __user
*oldval
,
3821 size_t __user
*oldlenp
,
3822 void __user
*newval
, size_t newlen
)
3824 int *valp
= table
->data
;
3828 if (!newval
|| !newlen
)
3830 if (newlen
!= sizeof(int))
3832 if (get_user(new, (int __user
*)newval
))
3836 if (oldval
&& oldlenp
) {
3838 if (get_user(len
, oldlenp
))
3841 if (len
> table
->maxlen
)
3842 len
= table
->maxlen
;
3843 if (copy_to_user(oldval
, valp
, len
))
3845 if (put_user(len
, oldlenp
))
3851 addrconf_fixup_forwarding(table
, valp
, val
);
3855 static struct addrconf_sysctl_table
3857 struct ctl_table_header
*sysctl_header
;
3858 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3860 } addrconf_sysctl __read_mostly
= {
3861 .sysctl_header
= NULL
,
3864 .ctl_name
= NET_IPV6_FORWARDING
,
3865 .procname
= "forwarding",
3866 .data
= &ipv6_devconf
.forwarding
,
3867 .maxlen
= sizeof(int),
3869 .proc_handler
= &addrconf_sysctl_forward
,
3870 .strategy
= &addrconf_sysctl_forward_strategy
,
3873 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3874 .procname
= "hop_limit",
3875 .data
= &ipv6_devconf
.hop_limit
,
3876 .maxlen
= sizeof(int),
3878 .proc_handler
= proc_dointvec
,
3881 .ctl_name
= NET_IPV6_MTU
,
3883 .data
= &ipv6_devconf
.mtu6
,
3884 .maxlen
= sizeof(int),
3886 .proc_handler
= &proc_dointvec
,
3889 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3890 .procname
= "accept_ra",
3891 .data
= &ipv6_devconf
.accept_ra
,
3892 .maxlen
= sizeof(int),
3894 .proc_handler
= &proc_dointvec
,
3897 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3898 .procname
= "accept_redirects",
3899 .data
= &ipv6_devconf
.accept_redirects
,
3900 .maxlen
= sizeof(int),
3902 .proc_handler
= &proc_dointvec
,
3905 .ctl_name
= NET_IPV6_AUTOCONF
,
3906 .procname
= "autoconf",
3907 .data
= &ipv6_devconf
.autoconf
,
3908 .maxlen
= sizeof(int),
3910 .proc_handler
= &proc_dointvec
,
3913 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3914 .procname
= "dad_transmits",
3915 .data
= &ipv6_devconf
.dad_transmits
,
3916 .maxlen
= sizeof(int),
3918 .proc_handler
= &proc_dointvec
,
3921 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3922 .procname
= "router_solicitations",
3923 .data
= &ipv6_devconf
.rtr_solicits
,
3924 .maxlen
= sizeof(int),
3926 .proc_handler
= &proc_dointvec
,
3929 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3930 .procname
= "router_solicitation_interval",
3931 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3932 .maxlen
= sizeof(int),
3934 .proc_handler
= &proc_dointvec_jiffies
,
3935 .strategy
= &sysctl_jiffies
,
3938 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3939 .procname
= "router_solicitation_delay",
3940 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3941 .maxlen
= sizeof(int),
3943 .proc_handler
= &proc_dointvec_jiffies
,
3944 .strategy
= &sysctl_jiffies
,
3947 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3948 .procname
= "force_mld_version",
3949 .data
= &ipv6_devconf
.force_mld_version
,
3950 .maxlen
= sizeof(int),
3952 .proc_handler
= &proc_dointvec
,
3954 #ifdef CONFIG_IPV6_PRIVACY
3956 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3957 .procname
= "use_tempaddr",
3958 .data
= &ipv6_devconf
.use_tempaddr
,
3959 .maxlen
= sizeof(int),
3961 .proc_handler
= &proc_dointvec
,
3964 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3965 .procname
= "temp_valid_lft",
3966 .data
= &ipv6_devconf
.temp_valid_lft
,
3967 .maxlen
= sizeof(int),
3969 .proc_handler
= &proc_dointvec
,
3972 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3973 .procname
= "temp_prefered_lft",
3974 .data
= &ipv6_devconf
.temp_prefered_lft
,
3975 .maxlen
= sizeof(int),
3977 .proc_handler
= &proc_dointvec
,
3980 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3981 .procname
= "regen_max_retry",
3982 .data
= &ipv6_devconf
.regen_max_retry
,
3983 .maxlen
= sizeof(int),
3985 .proc_handler
= &proc_dointvec
,
3988 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3989 .procname
= "max_desync_factor",
3990 .data
= &ipv6_devconf
.max_desync_factor
,
3991 .maxlen
= sizeof(int),
3993 .proc_handler
= &proc_dointvec
,
3997 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3998 .procname
= "max_addresses",
3999 .data
= &ipv6_devconf
.max_addresses
,
4000 .maxlen
= sizeof(int),
4002 .proc_handler
= &proc_dointvec
,
4005 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
4006 .procname
= "accept_ra_defrtr",
4007 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4008 .maxlen
= sizeof(int),
4010 .proc_handler
= &proc_dointvec
,
4013 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
4014 .procname
= "accept_ra_pinfo",
4015 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4016 .maxlen
= sizeof(int),
4018 .proc_handler
= &proc_dointvec
,
4020 #ifdef CONFIG_IPV6_ROUTER_PREF
4022 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
4023 .procname
= "accept_ra_rtr_pref",
4024 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4025 .maxlen
= sizeof(int),
4027 .proc_handler
= &proc_dointvec
,
4030 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4031 .procname
= "router_probe_interval",
4032 .data
= &ipv6_devconf
.rtr_probe_interval
,
4033 .maxlen
= sizeof(int),
4035 .proc_handler
= &proc_dointvec_jiffies
,
4036 .strategy
= &sysctl_jiffies
,
4038 #ifdef CONFIG_IPV6_ROUTE_INFO
4040 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4041 .procname
= "accept_ra_rt_info_max_plen",
4042 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4043 .maxlen
= sizeof(int),
4045 .proc_handler
= &proc_dointvec
,
4050 .ctl_name
= NET_IPV6_PROXY_NDP
,
4051 .procname
= "proxy_ndp",
4052 .data
= &ipv6_devconf
.proxy_ndp
,
4053 .maxlen
= sizeof(int),
4055 .proc_handler
= &proc_dointvec
,
4058 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4059 .procname
= "accept_source_route",
4060 .data
= &ipv6_devconf
.accept_source_route
,
4061 .maxlen
= sizeof(int),
4063 .proc_handler
= &proc_dointvec
,
4065 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4067 .ctl_name
= CTL_UNNUMBERED
,
4068 .procname
= "optimistic_dad",
4069 .data
= &ipv6_devconf
.optimistic_dad
,
4070 .maxlen
= sizeof(int),
4072 .proc_handler
= &proc_dointvec
,
4077 .ctl_name
= 0, /* sentinel */
4082 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4083 int ctl_name
, struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4086 struct addrconf_sysctl_table
*t
;
4088 #define ADDRCONF_CTL_PATH_DEV 3
4090 struct ctl_path addrconf_ctl_path
[] = {
4091 { .procname
= "net", .ctl_name
= CTL_NET
, },
4092 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
4093 { .procname
= "conf", .ctl_name
= NET_IPV6_CONF
, },
4094 { /* to be set */ },
4099 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4103 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4104 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4105 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4106 t
->addrconf_vars
[i
].extra2
= net
;
4110 * Make a copy of dev_name, because '.procname' is regarded as const
4111 * by sysctl and we wouldn't want anyone to change it under our feet
4112 * (see SIOCSIFNAME).
4114 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4118 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4119 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].ctl_name
= ctl_name
;
4121 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4123 if (t
->sysctl_header
== NULL
)
4137 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4139 struct addrconf_sysctl_table
*t
;
4141 if (p
->sysctl
== NULL
)
4146 unregister_sysctl_table(t
->sysctl_header
);
4151 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4153 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, NET_IPV6
,
4154 NET_IPV6_NEIGH
, "ipv6",
4155 &ndisc_ifinfo_sysctl_change
,
4157 __addrconf_sysctl_register(idev
->dev
->nd_net
, idev
->dev
->name
,
4158 idev
->dev
->ifindex
, idev
, &idev
->cnf
);
4161 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4163 __addrconf_sysctl_unregister(&idev
->cnf
);
4164 neigh_sysctl_unregister(idev
->nd_parms
);
4170 static int addrconf_init_net(struct net
*net
)
4173 struct ipv6_devconf
*all
, *dflt
;
4176 all
= &ipv6_devconf
;
4177 dflt
= &ipv6_devconf_dflt
;
4179 if (net
!= &init_net
) {
4180 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4184 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4186 goto err_alloc_dflt
;
4189 net
->ipv6
.devconf_all
= all
;
4190 net
->ipv6
.devconf_dflt
= dflt
;
4192 #ifdef CONFIG_SYSCTL
4193 err
= __addrconf_sysctl_register(net
, "all", NET_PROTO_CONF_ALL
,
4198 err
= __addrconf_sysctl_register(net
, "default", NET_PROTO_CONF_DEFAULT
,
4205 #ifdef CONFIG_SYSCTL
4207 __addrconf_sysctl_unregister(all
);
4217 static void addrconf_exit_net(struct net
*net
)
4219 #ifdef CONFIG_SYSCTL
4220 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4221 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4223 if (net
!= &init_net
) {
4224 kfree(net
->ipv6
.devconf_dflt
);
4225 kfree(net
->ipv6
.devconf_all
);
4229 static struct pernet_operations addrconf_ops
= {
4230 .init
= addrconf_init_net
,
4231 .exit
= addrconf_exit_net
,
4238 int register_inet6addr_notifier(struct notifier_block
*nb
)
4240 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4243 EXPORT_SYMBOL(register_inet6addr_notifier
);
4245 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4247 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4250 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4253 static int addrconf_net_init(struct net
*net
)
4258 static void addrconf_net_exit(struct net
*net
)
4260 struct net_device
*dev
;
4263 /* clean dev list */
4264 for_each_netdev(net
, dev
) {
4265 if (__in6_dev_get(dev
) == NULL
)
4267 addrconf_ifdown(dev
, 1);
4269 addrconf_ifdown(net
->loopback_dev
, 2);
4273 static struct pernet_operations addrconf_net_ops
= {
4274 .init
= addrconf_net_init
,
4275 .exit
= addrconf_net_exit
,
4279 * Init / cleanup code
4282 int __init
addrconf_init(void)
4286 if ((err
= ipv6_addr_label_init()) < 0) {
4287 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4292 register_pernet_subsys(&addrconf_ops
);
4294 /* The addrconf netdev notifier requires that loopback_dev
4295 * has it's ipv6 private information allocated and setup
4296 * before it can bring up and give link-local addresses
4297 * to other devices which are up.
4299 * Unfortunately, loopback_dev is not necessarily the first
4300 * entry in the global dev_base list of net devices. In fact,
4301 * it is likely to be the very last entry on that list.
4302 * So this causes the notifier registry below to try and
4303 * give link-local addresses to all devices besides loopback_dev
4304 * first, then loopback_dev, which cases all the non-loopback_dev
4305 * devices to fail to get a link-local address.
4307 * So, as a temporary fix, allocate the ipv6 structure for
4308 * loopback_dev first by hand.
4309 * Longer term, all of the dependencies ipv6 has upon the loopback
4310 * device and it being up should be removed.
4313 if (!ipv6_add_dev(init_net
.loopback_dev
))
4319 err
= register_pernet_device(&addrconf_net_ops
);
4323 register_netdevice_notifier(&ipv6_dev_notf
);
4327 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4331 /* Only the first call to __rtnl_register can fail */
4332 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4333 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4334 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4335 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4336 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4338 ipv6_addr_label_rtnl_register();
4342 unregister_netdevice_notifier(&ipv6_dev_notf
);
4344 unregister_pernet_subsys(&addrconf_ops
);
4349 void addrconf_cleanup(void)
4351 struct inet6_ifaddr
*ifa
;
4354 unregister_netdevice_notifier(&ipv6_dev_notf
);
4355 unregister_pernet_device(&addrconf_net_ops
);
4357 unregister_pernet_subsys(&addrconf_ops
);
4364 write_lock_bh(&addrconf_hash_lock
);
4365 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4366 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4367 struct inet6_ifaddr
*bifa
;
4370 ifa
= ifa
->lst_next
;
4371 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4372 /* Do not free it; something is wrong.
4373 Now we can investigate it with debugger.
4377 write_unlock_bh(&addrconf_hash_lock
);
4379 del_timer(&addr_chk_timer
);
4382 unregister_pernet_subsys(&addrconf_net_ops
);