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 __FUNCTION__
, 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 __FUNCTION__
, 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();
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(&init_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
;
755 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
756 rt
= rt6_lookup(&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
;
779 unsigned long regen_advance
;
785 write_lock(&idev
->lock
);
787 spin_lock_bh(&ift
->lock
);
788 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
789 spin_unlock_bh(&ift
->lock
);
796 if (idev
->cnf
.use_tempaddr
<= 0) {
797 write_unlock(&idev
->lock
);
799 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
804 spin_lock_bh(&ifp
->lock
);
805 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
806 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
807 spin_unlock_bh(&ifp
->lock
);
808 write_unlock(&idev
->lock
);
810 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
816 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
817 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
818 spin_unlock_bh(&ifp
->lock
);
819 write_unlock(&idev
->lock
);
821 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
827 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
828 tmp_valid_lft
= min_t(__u32
,
830 idev
->cnf
.temp_valid_lft
);
831 tmp_prefered_lft
= min_t(__u32
,
833 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
834 tmp_plen
= ifp
->prefix_len
;
835 max_addresses
= idev
->cnf
.max_addresses
;
836 tmp_cstamp
= ifp
->cstamp
;
837 tmp_tstamp
= ifp
->tstamp
;
838 spin_unlock_bh(&ifp
->lock
);
840 regen_advance
= idev
->cnf
.regen_max_retry
*
841 idev
->cnf
.dad_transmits
*
842 idev
->nd_parms
->retrans_time
/ HZ
;
843 write_unlock(&idev
->lock
);
845 /* A temporary address is created only if this calculated Preferred
846 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
847 * an implementation must not create a temporary address with a zero
848 * Preferred Lifetime.
850 if (tmp_prefered_lft
<= regen_advance
) {
857 addr_flags
= IFA_F_TEMPORARY
;
858 /* set in addrconf_prefix_rcv() */
859 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
860 addr_flags
|= IFA_F_OPTIMISTIC
;
862 ift
= !max_addresses
||
863 ipv6_count_addresses(idev
) < max_addresses
?
864 ipv6_add_addr(idev
, &addr
, tmp_plen
,
865 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
867 if (!ift
|| IS_ERR(ift
)) {
871 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
873 write_lock(&idev
->lock
);
877 spin_lock_bh(&ift
->lock
);
879 ift
->valid_lft
= tmp_valid_lft
;
880 ift
->prefered_lft
= tmp_prefered_lft
;
881 ift
->cstamp
= tmp_cstamp
;
882 ift
->tstamp
= tmp_tstamp
;
883 spin_unlock_bh(&ift
->lock
);
885 addrconf_dad_start(ift
, 0);
894 * Choose an appropriate source address (RFC3484)
896 struct ipv6_saddr_score
{
904 #define IPV6_SADDR_SCORE_LOCAL 0x0001
905 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
906 #define IPV6_SADDR_SCORE_HOA 0x0008
907 #define IPV6_SADDR_SCORE_OIF 0x0010
908 #define IPV6_SADDR_SCORE_LABEL 0x0020
909 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
911 static inline int ipv6_saddr_preferred(int type
)
913 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
914 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
919 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
920 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
922 struct ipv6_saddr_score hiscore
;
923 struct inet6_ifaddr
*ifa_result
= NULL
;
924 int daddr_type
= __ipv6_addr_type(daddr
);
925 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
926 int daddr_ifindex
= daddr_dev
? daddr_dev
->ifindex
: 0;
927 u32 daddr_label
= ipv6_addr_label(daddr
, daddr_type
, daddr_ifindex
);
928 struct net_device
*dev
;
930 memset(&hiscore
, 0, sizeof(hiscore
));
932 read_lock(&dev_base_lock
);
935 for_each_netdev(&init_net
, dev
) {
936 struct inet6_dev
*idev
;
937 struct inet6_ifaddr
*ifa
;
939 /* Rule 0: Candidate Source Address (section 4)
940 * - multicast and link-local destination address,
941 * the set of candidate source address MUST only
942 * include addresses assigned to interfaces
943 * belonging to the same link as the outgoing
945 * (- For site-local destination addresses, the
946 * set of candidate source addresses MUST only
947 * include addresses assigned to interfaces
948 * belonging to the same site as the outgoing
951 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
952 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
953 daddr_dev
&& dev
!= daddr_dev
)
956 idev
= __in6_dev_get(dev
);
960 read_lock_bh(&idev
->lock
);
961 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
962 struct ipv6_saddr_score score
;
964 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
967 * - Tentative Address (RFC2462 section 5.4)
968 * - A tentative address is not considered
969 * "assigned to an interface" in the traditional
970 * sense, unless it is also flagged as optimistic.
971 * - Candidate Source Address (section 4)
972 * - In any case, anycast addresses, multicast
973 * addresses, and the unspecified address MUST
974 * NOT be included in a candidate set.
976 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
977 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
979 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
980 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
981 LIMIT_NETDEBUG(KERN_DEBUG
982 "ADDRCONF: unspecified / multicast address "
983 "assigned as unicast address on %s",
993 if (ifa_result
== NULL
) {
994 /* record it if the first available entry */
998 /* Rule 1: Prefer same address */
999 if (hiscore
.rule
< 1) {
1000 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
1001 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
1004 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
1005 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
1006 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
1011 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
1015 /* Rule 2: Prefer appropriate scope */
1016 if (hiscore
.rule
< 2) {
1017 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
1020 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
1021 if (hiscore
.scope
< score
.scope
) {
1022 if (hiscore
.scope
< daddr_scope
) {
1027 } else if (score
.scope
< hiscore
.scope
) {
1028 if (score
.scope
< daddr_scope
)
1029 break; /* addresses sorted by scope */
1036 /* Rule 3: Avoid deprecated and optimistic addresses */
1037 if (hiscore
.rule
< 3) {
1038 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
1039 (((ifa_result
->flags
&
1040 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
1041 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1044 if (ipv6_saddr_preferred(score
.addr_type
) ||
1046 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
1047 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
1048 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1053 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1057 /* Rule 4: Prefer home address */
1058 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
1059 if (hiscore
.rule
< 4) {
1060 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1061 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1064 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1065 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1066 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1071 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1075 if (hiscore
.rule
< 4)
1079 /* Rule 5: Prefer outgoing interface */
1080 if (hiscore
.rule
< 5) {
1081 if (daddr_dev
== NULL
||
1082 daddr_dev
== ifa_result
->idev
->dev
)
1083 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1086 if (daddr_dev
== NULL
||
1087 daddr_dev
== ifa
->idev
->dev
) {
1088 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1089 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1094 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1098 /* Rule 6: Prefer matching label */
1099 if (hiscore
.rule
< 6) {
1100 if (ipv6_addr_label(&ifa_result
->addr
,
1102 ifa_result
->idev
->dev
->ifindex
) == daddr_label
)
1103 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1106 if (ipv6_addr_label(&ifa
->addr
,
1108 ifa
->idev
->dev
->ifindex
) == daddr_label
) {
1109 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1110 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1115 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1119 #ifdef CONFIG_IPV6_PRIVACY
1120 /* Rule 7: Prefer public address
1121 * Note: prefer temprary address if use_tempaddr >= 2
1123 if (hiscore
.rule
< 7) {
1124 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1125 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1126 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1129 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1130 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1131 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1132 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1137 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1141 if (hiscore
.rule
< 7)
1144 /* Rule 8: Use longest matching prefix */
1145 if (hiscore
.rule
< 8) {
1146 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1149 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1150 if (score
.matchlen
> hiscore
.matchlen
) {
1155 else if (score
.matchlen
< hiscore
.matchlen
)
1159 /* Final Rule: choose first available one */
1163 in6_ifa_put(ifa_result
);
1168 read_unlock_bh(&idev
->lock
);
1171 read_unlock(&dev_base_lock
);
1174 return -EADDRNOTAVAIL
;
1176 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1177 in6_ifa_put(ifa_result
);
1182 int ipv6_get_saddr(struct dst_entry
*dst
,
1183 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1185 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1188 EXPORT_SYMBOL(ipv6_get_saddr
);
1190 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1191 unsigned char banned_flags
)
1193 struct inet6_dev
*idev
;
1194 int err
= -EADDRNOTAVAIL
;
1197 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1198 struct inet6_ifaddr
*ifp
;
1200 read_lock_bh(&idev
->lock
);
1201 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1202 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1203 ipv6_addr_copy(addr
, &ifp
->addr
);
1208 read_unlock_bh(&idev
->lock
);
1214 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1217 struct inet6_ifaddr
*ifp
;
1219 read_lock_bh(&idev
->lock
);
1220 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1222 read_unlock_bh(&idev
->lock
);
1226 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1227 struct net_device
*dev
, int strict
)
1229 struct inet6_ifaddr
* ifp
;
1230 u8 hash
= ipv6_addr_hash(addr
);
1232 read_lock_bh(&addrconf_hash_lock
);
1233 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1234 if (ifp
->idev
->dev
->nd_net
!= net
)
1236 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1237 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1238 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1239 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1243 read_unlock_bh(&addrconf_hash_lock
);
1246 EXPORT_SYMBOL(ipv6_chk_addr
);
1249 int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1250 struct net_device
*dev
)
1252 struct inet6_ifaddr
* ifp
;
1253 u8 hash
= ipv6_addr_hash(addr
);
1255 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1256 if (ifp
->idev
->dev
->nd_net
!= net
)
1258 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1259 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1266 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, struct in6_addr
*addr
,
1267 struct net_device
*dev
, int strict
)
1269 struct inet6_ifaddr
* ifp
;
1270 u8 hash
= ipv6_addr_hash(addr
);
1272 read_lock_bh(&addrconf_hash_lock
);
1273 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1274 if (ifp
->idev
->dev
->nd_net
!= net
)
1276 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1277 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1278 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1284 read_unlock_bh(&addrconf_hash_lock
);
1289 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1291 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1292 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1293 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1294 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1295 int sk_ipv6only
= ipv6_only_sock(sk
);
1296 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1297 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1298 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1300 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1303 if (addr_type2
== IPV6_ADDR_ANY
&&
1304 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1307 if (addr_type
== IPV6_ADDR_ANY
&&
1308 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1311 if (sk2_rcv_saddr6
&&
1312 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1315 if (addr_type
== IPV6_ADDR_MAPPED
&&
1317 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1323 /* Gets referenced address, destroys ifaddr */
1325 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1327 if (ifp
->flags
&IFA_F_PERMANENT
) {
1328 spin_lock_bh(&ifp
->lock
);
1329 addrconf_del_timer(ifp
);
1330 ifp
->flags
|= IFA_F_TENTATIVE
;
1331 spin_unlock_bh(&ifp
->lock
);
1333 #ifdef CONFIG_IPV6_PRIVACY
1334 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1335 struct inet6_ifaddr
*ifpub
;
1336 spin_lock_bh(&ifp
->lock
);
1339 in6_ifa_hold(ifpub
);
1340 spin_unlock_bh(&ifp
->lock
);
1341 ipv6_create_tempaddr(ifpub
, ifp
);
1344 spin_unlock_bh(&ifp
->lock
);
1352 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1354 if (net_ratelimit())
1355 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1356 addrconf_dad_stop(ifp
);
1359 /* Join to solicited addr multicast group. */
1361 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1363 struct in6_addr maddr
;
1365 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1368 addrconf_addr_solict_mult(addr
, &maddr
);
1369 ipv6_dev_mc_inc(dev
, &maddr
);
1372 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1374 struct in6_addr maddr
;
1376 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1379 addrconf_addr_solict_mult(addr
, &maddr
);
1380 __ipv6_dev_mc_dec(idev
, &maddr
);
1383 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1385 struct in6_addr addr
;
1386 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1387 if (ipv6_addr_any(&addr
))
1389 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1392 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1394 struct in6_addr addr
;
1395 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1396 if (ipv6_addr_any(&addr
))
1398 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1401 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1403 if (dev
->addr_len
!= ETH_ALEN
)
1405 memcpy(eui
, dev
->dev_addr
, 3);
1406 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1409 * The zSeries OSA network cards can be shared among various
1410 * OS instances, but the OSA cards have only one MAC address.
1411 * This leads to duplicate address conflicts in conjunction
1412 * with IPv6 if more than one instance uses the same card.
1414 * The driver for these cards can deliver a unique 16-bit
1415 * identifier for each instance sharing the same card. It is
1416 * placed instead of 0xFFFE in the interface identifier. The
1417 * "u" bit of the interface identifier is not inverted in this
1418 * case. Hence the resulting interface identifier has local
1419 * scope according to RFC2373.
1422 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1423 eui
[4] = dev
->dev_id
& 0xFF;
1432 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1434 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1435 if (dev
->addr_len
!= ARCNET_ALEN
)
1438 eui
[7] = *(u8
*)dev
->dev_addr
;
1442 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1444 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1446 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1451 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1453 switch (dev
->type
) {
1456 case ARPHRD_IEEE802_TR
:
1457 return addrconf_ifid_eui48(eui
, dev
);
1459 return addrconf_ifid_arcnet(eui
, dev
);
1460 case ARPHRD_INFINIBAND
:
1461 return addrconf_ifid_infiniband(eui
, dev
);
1463 if (dev
->priv_flags
& IFF_ISATAP
)
1464 return ipv6_isatap_eui64(eui
, *(__be32
*)dev
->dev_addr
);
1469 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1472 struct inet6_ifaddr
*ifp
;
1474 read_lock_bh(&idev
->lock
);
1475 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1476 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1477 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1482 read_unlock_bh(&idev
->lock
);
1486 #ifdef CONFIG_IPV6_PRIVACY
1487 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1488 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1491 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1492 idev
->rndid
[0] &= ~0x02;
1495 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1496 * check if generated address is not inappropriate
1498 * - Reserved subnet anycast (RFC 2526)
1499 * 11111101 11....11 1xxxxxxx
1500 * - ISATAP (RFC4214) 6.1
1501 * 00-00-5E-FE-xx-xx-xx-xx
1503 * - XXX: already assigned to an address on the device
1505 if (idev
->rndid
[0] == 0xfd &&
1506 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1507 (idev
->rndid
[7]&0x80))
1509 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1510 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1512 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1519 static void ipv6_regen_rndid(unsigned long data
)
1521 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1522 unsigned long expires
;
1525 write_lock_bh(&idev
->lock
);
1530 if (__ipv6_regen_rndid(idev
) < 0)
1534 idev
->cnf
.temp_prefered_lft
* HZ
-
1535 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1536 if (time_before(expires
, jiffies
)) {
1538 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1543 if (!mod_timer(&idev
->regen_timer
, expires
))
1547 write_unlock_bh(&idev
->lock
);
1548 rcu_read_unlock_bh();
1552 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1555 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1556 ret
= __ipv6_regen_rndid(idev
);
1566 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1567 unsigned long expires
, u32 flags
)
1569 struct fib6_config cfg
= {
1570 .fc_table
= RT6_TABLE_PREFIX
,
1571 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1572 .fc_ifindex
= dev
->ifindex
,
1573 .fc_expires
= expires
,
1575 .fc_flags
= RTF_UP
| flags
,
1576 .fc_nlinfo
.nl_net
= &init_net
,
1579 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1581 /* Prevent useless cloning on PtP SIT.
1582 This thing is done here expecting that the whole
1583 class of non-broadcast devices need not cloning.
1585 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1586 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1587 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1590 ip6_route_add(&cfg
);
1593 /* Create "default" multicast route to the interface */
1595 static void addrconf_add_mroute(struct net_device
*dev
)
1597 struct fib6_config cfg
= {
1598 .fc_table
= RT6_TABLE_LOCAL
,
1599 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1600 .fc_ifindex
= dev
->ifindex
,
1603 .fc_nlinfo
.nl_net
= &init_net
,
1606 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1608 ip6_route_add(&cfg
);
1611 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1612 static void sit_route_add(struct net_device
*dev
)
1614 struct fib6_config cfg
= {
1615 .fc_table
= RT6_TABLE_MAIN
,
1616 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1617 .fc_ifindex
= dev
->ifindex
,
1619 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1620 .fc_nlinfo
.nl_net
= &init_net
,
1623 /* prefix length - 96 bits "::d.d.d.d" */
1624 ip6_route_add(&cfg
);
1628 static void addrconf_add_lroute(struct net_device
*dev
)
1630 struct in6_addr addr
;
1632 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1633 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1636 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1638 struct inet6_dev
*idev
;
1642 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1645 /* Add default multicast route */
1646 addrconf_add_mroute(dev
);
1648 /* Add link local route */
1649 addrconf_add_lroute(dev
);
1653 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1655 struct prefix_info
*pinfo
;
1659 unsigned long rt_expires
;
1660 struct inet6_dev
*in6_dev
;
1662 pinfo
= (struct prefix_info
*) opt
;
1664 if (len
< sizeof(struct prefix_info
)) {
1665 ADBG(("addrconf: prefix option too short\n"));
1670 * Validation checks ([ADDRCONF], page 19)
1673 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1675 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1678 valid_lft
= ntohl(pinfo
->valid
);
1679 prefered_lft
= ntohl(pinfo
->prefered
);
1681 if (prefered_lft
> valid_lft
) {
1682 if (net_ratelimit())
1683 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1687 in6_dev
= in6_dev_get(dev
);
1689 if (in6_dev
== NULL
) {
1690 if (net_ratelimit())
1691 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1696 * Two things going on here:
1697 * 1) Add routes for on-link prefixes
1698 * 2) Configure prefixes with the auto flag set
1701 /* Avoid arithmetic overflow. Really, we could
1702 save rt_expires in seconds, likely valid_lft,
1703 but it would require division in fib gc, that it
1706 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1707 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1709 rt_expires
= valid_lft
* HZ
;
1712 * We convert this (in jiffies) to clock_t later.
1713 * Avoid arithmetic overflow there as well.
1714 * Overflow can happen only if HZ < USER_HZ.
1716 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1717 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1719 if (pinfo
->onlink
) {
1720 struct rt6_info
*rt
;
1721 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1723 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1724 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1725 if (valid_lft
== 0) {
1729 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1732 } else if (valid_lft
) {
1733 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1734 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1737 dst_release(&rt
->u
.dst
);
1740 /* Try to figure out our local address for this prefix */
1742 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1743 struct inet6_ifaddr
* ifp
;
1744 struct in6_addr addr
;
1745 int create
= 0, update_lft
= 0;
1747 if (pinfo
->prefix_len
== 64) {
1748 memcpy(&addr
, &pinfo
->prefix
, 8);
1749 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1750 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1751 in6_dev_put(in6_dev
);
1756 if (net_ratelimit())
1757 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1759 in6_dev_put(in6_dev
);
1764 ifp
= ipv6_get_ifaddr(&init_net
, &addr
, dev
, 1);
1766 if (ifp
== NULL
&& valid_lft
) {
1767 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1770 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1771 if (in6_dev
->cnf
.optimistic_dad
&&
1772 !ipv6_devconf
.forwarding
)
1773 addr_flags
= IFA_F_OPTIMISTIC
;
1776 /* Do not allow to create too much of autoconfigured
1777 * addresses; this would be too easy way to crash kernel.
1779 if (!max_addresses
||
1780 ipv6_count_addresses(in6_dev
) < max_addresses
)
1781 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1782 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1785 if (!ifp
|| IS_ERR(ifp
)) {
1786 in6_dev_put(in6_dev
);
1790 update_lft
= create
= 1;
1791 ifp
->cstamp
= jiffies
;
1792 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1798 #ifdef CONFIG_IPV6_PRIVACY
1799 struct inet6_ifaddr
*ift
;
1803 /* update lifetime (RFC2462 5.5.3 e) */
1804 spin_lock(&ifp
->lock
);
1806 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1807 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1810 if (!update_lft
&& stored_lft
) {
1811 if (valid_lft
> MIN_VALID_LIFETIME
||
1812 valid_lft
> stored_lft
)
1814 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1815 /* valid_lft <= stored_lft is always true */
1819 valid_lft
= MIN_VALID_LIFETIME
;
1820 if (valid_lft
< prefered_lft
)
1821 prefered_lft
= valid_lft
;
1827 ifp
->valid_lft
= valid_lft
;
1828 ifp
->prefered_lft
= prefered_lft
;
1831 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1832 spin_unlock(&ifp
->lock
);
1834 if (!(flags
&IFA_F_TENTATIVE
))
1835 ipv6_ifa_notify(0, ifp
);
1837 spin_unlock(&ifp
->lock
);
1839 #ifdef CONFIG_IPV6_PRIVACY
1840 read_lock_bh(&in6_dev
->lock
);
1841 /* update all temporary addresses in the list */
1842 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1844 * When adjusting the lifetimes of an existing
1845 * temporary address, only lower the lifetimes.
1846 * Implementations must not increase the
1847 * lifetimes of an existing temporary address
1848 * when processing a Prefix Information Option.
1850 if (ifp
!= ift
->ifpub
)
1853 spin_lock(&ift
->lock
);
1855 if (ift
->valid_lft
> valid_lft
&&
1856 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1857 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1858 if (ift
->prefered_lft
> prefered_lft
&&
1859 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1860 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1861 spin_unlock(&ift
->lock
);
1862 if (!(flags
&IFA_F_TENTATIVE
))
1863 ipv6_ifa_notify(0, ift
);
1866 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1868 * When a new public address is created as described in [ADDRCONF],
1869 * also create a new temporary address.
1871 read_unlock_bh(&in6_dev
->lock
);
1872 ipv6_create_tempaddr(ifp
, NULL
);
1874 read_unlock_bh(&in6_dev
->lock
);
1881 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1882 in6_dev_put(in6_dev
);
1886 * Set destination address.
1887 * Special case for SIT interfaces where we create a new "virtual"
1890 int addrconf_set_dstaddr(void __user
*arg
)
1892 struct in6_ifreq ireq
;
1893 struct net_device
*dev
;
1899 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1902 dev
= __dev_get_by_index(&init_net
, ireq
.ifr6_ifindex
);
1908 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1909 if (dev
->type
== ARPHRD_SIT
) {
1912 struct ip_tunnel_parm p
;
1914 err
= -EADDRNOTAVAIL
;
1915 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1918 memset(&p
, 0, sizeof(p
));
1919 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1923 p
.iph
.protocol
= IPPROTO_IPV6
;
1925 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
1927 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1928 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1933 if ((dev
= __dev_get_by_name(&init_net
, p
.name
)) == NULL
)
1935 err
= dev_open(dev
);
1946 * Manual configuration of address on an interface
1948 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1949 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1951 struct inet6_ifaddr
*ifp
;
1952 struct inet6_dev
*idev
;
1953 struct net_device
*dev
;
1955 u32 flags
= RTF_EXPIRES
;
1959 /* check the lifetime */
1960 if (!valid_lft
|| prefered_lft
> valid_lft
)
1963 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
1966 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1969 scope
= ipv6_addr_scope(pfx
);
1971 if (valid_lft
== INFINITY_LIFE_TIME
) {
1972 ifa_flags
|= IFA_F_PERMANENT
;
1974 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1975 valid_lft
= 0x7FFFFFFF/HZ
;
1977 if (prefered_lft
== 0)
1978 ifa_flags
|= IFA_F_DEPRECATED
;
1979 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1980 (prefered_lft
!= INFINITY_LIFE_TIME
))
1981 prefered_lft
= 0x7FFFFFFF/HZ
;
1983 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1986 spin_lock_bh(&ifp
->lock
);
1987 ifp
->valid_lft
= valid_lft
;
1988 ifp
->prefered_lft
= prefered_lft
;
1989 ifp
->tstamp
= jiffies
;
1990 spin_unlock_bh(&ifp
->lock
);
1992 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1993 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1995 * Note that section 3.1 of RFC 4429 indicates
1996 * that the Optimistic flag should not be set for
1997 * manually configured addresses
1999 addrconf_dad_start(ifp
, 0);
2005 return PTR_ERR(ifp
);
2008 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
2010 struct inet6_ifaddr
*ifp
;
2011 struct inet6_dev
*idev
;
2012 struct net_device
*dev
;
2014 if ((dev
= __dev_get_by_index(&init_net
, ifindex
)) == NULL
)
2017 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2020 read_lock_bh(&idev
->lock
);
2021 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
2022 if (ifp
->prefix_len
== plen
&&
2023 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2025 read_unlock_bh(&idev
->lock
);
2029 /* If the last address is deleted administratively,
2030 disable IPv6 on this interface.
2032 if (idev
->addr_list
== NULL
)
2033 addrconf_ifdown(idev
->dev
, 1);
2037 read_unlock_bh(&idev
->lock
);
2038 return -EADDRNOTAVAIL
;
2042 int addrconf_add_ifaddr(void __user
*arg
)
2044 struct in6_ifreq ireq
;
2047 if (!capable(CAP_NET_ADMIN
))
2050 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2054 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
2055 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2060 int addrconf_del_ifaddr(void __user
*arg
)
2062 struct in6_ifreq ireq
;
2065 if (!capable(CAP_NET_ADMIN
))
2068 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2072 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2077 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2078 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2080 struct inet6_ifaddr
* ifp
;
2081 struct in6_addr addr
;
2082 struct net_device
*dev
;
2087 memset(&addr
, 0, sizeof(struct in6_addr
));
2088 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2090 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2091 addr
.s6_addr32
[0] = htonl(0xfe800000);
2094 scope
= IPV6_ADDR_COMPATv4
;
2097 if (addr
.s6_addr32
[3]) {
2098 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2100 spin_lock_bh(&ifp
->lock
);
2101 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2102 spin_unlock_bh(&ifp
->lock
);
2103 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2109 for_each_netdev(&init_net
, dev
) {
2110 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2111 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2112 struct in_ifaddr
* ifa
;
2116 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2119 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2121 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2123 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2124 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2128 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2133 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2136 spin_lock_bh(&ifp
->lock
);
2137 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2138 spin_unlock_bh(&ifp
->lock
);
2139 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2148 static void init_loopback(struct net_device
*dev
)
2150 struct inet6_dev
*idev
;
2151 struct inet6_ifaddr
* ifp
;
2157 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2158 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2162 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2164 spin_lock_bh(&ifp
->lock
);
2165 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2166 spin_unlock_bh(&ifp
->lock
);
2167 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2172 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2174 struct inet6_ifaddr
* ifp
;
2175 u32 addr_flags
= IFA_F_PERMANENT
;
2177 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2178 if (idev
->cnf
.optimistic_dad
&&
2179 !ipv6_devconf
.forwarding
)
2180 addr_flags
|= IFA_F_OPTIMISTIC
;
2184 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2186 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2187 addrconf_dad_start(ifp
, 0);
2192 static void addrconf_dev_config(struct net_device
*dev
)
2194 struct in6_addr addr
;
2195 struct inet6_dev
* idev
;
2199 if ((dev
->type
!= ARPHRD_ETHER
) &&
2200 (dev
->type
!= ARPHRD_FDDI
) &&
2201 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2202 (dev
->type
!= ARPHRD_ARCNET
) &&
2203 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2204 /* Alas, we support only Ethernet autoconfiguration. */
2208 idev
= addrconf_add_dev(dev
);
2212 memset(&addr
, 0, sizeof(struct in6_addr
));
2213 addr
.s6_addr32
[0] = htonl(0xFE800000);
2215 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2216 addrconf_add_linklocal(idev
, &addr
);
2219 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2220 static void addrconf_sit_config(struct net_device
*dev
)
2222 struct inet6_dev
*idev
;
2227 * Configure the tunnel with one of our IPv4
2228 * addresses... we should configure all of
2229 * our v4 addrs in the tunnel
2232 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2233 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2237 if (dev
->priv_flags
& IFF_ISATAP
) {
2238 struct in6_addr addr
;
2240 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2241 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2242 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2243 addrconf_add_linklocal(idev
, &addr
);
2247 sit_add_v4_addrs(idev
);
2249 if (dev
->flags
&IFF_POINTOPOINT
) {
2250 addrconf_add_mroute(dev
);
2251 addrconf_add_lroute(dev
);
2258 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2260 struct in6_addr lladdr
;
2262 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2263 addrconf_add_linklocal(idev
, &lladdr
);
2269 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2271 struct net_device
*link_dev
;
2273 /* first try to inherit the link-local address from the link device */
2274 if (idev
->dev
->iflink
&&
2275 (link_dev
= __dev_get_by_index(&init_net
, idev
->dev
->iflink
))) {
2276 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2279 /* then try to inherit it from any device */
2280 for_each_netdev(&init_net
, link_dev
) {
2281 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2284 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2288 * Autoconfigure tunnel with a link-local address so routing protocols,
2289 * DHCPv6, MLD etc. can be run over the virtual link
2292 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2294 struct inet6_dev
*idev
;
2298 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2299 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2302 ip6_tnl_add_linklocal(idev
);
2305 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2308 struct net_device
*dev
= (struct net_device
*) data
;
2309 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2310 int run_pending
= 0;
2313 if (dev
->nd_net
!= &init_net
)
2317 case NETDEV_REGISTER
:
2318 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2319 idev
= ipv6_add_dev(dev
);
2321 return notifier_from_errno(-ENOMEM
);
2326 if (dev
->flags
& IFF_SLAVE
)
2329 if (event
== NETDEV_UP
) {
2330 if (!addrconf_qdisc_ok(dev
)) {
2331 /* device is not ready yet. */
2333 "ADDRCONF(NETDEV_UP): %s: "
2334 "link is not ready\n",
2339 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2340 idev
= ipv6_add_dev(dev
);
2343 idev
->if_flags
|= IF_READY
;
2345 if (!addrconf_qdisc_ok(dev
)) {
2346 /* device is still not ready. */
2351 if (idev
->if_flags
& IF_READY
) {
2352 /* device is already configured. */
2355 idev
->if_flags
|= IF_READY
;
2359 "ADDRCONF(NETDEV_CHANGE): %s: "
2360 "link becomes ready\n",
2367 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2369 addrconf_sit_config(dev
);
2372 case ARPHRD_TUNNEL6
:
2373 addrconf_ip6_tnl_config(dev
);
2375 case ARPHRD_LOOPBACK
:
2380 addrconf_dev_config(dev
);
2385 addrconf_dad_run(idev
);
2387 /* If the MTU changed during the interface down, when the
2388 interface up, the changed MTU must be reflected in the
2389 idev as well as routers.
2391 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2392 rt6_mtu_change(dev
, dev
->mtu
);
2393 idev
->cnf
.mtu6
= dev
->mtu
;
2395 idev
->tstamp
= jiffies
;
2396 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2397 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2398 stop IPv6 on this interface.
2400 if (dev
->mtu
< IPV6_MIN_MTU
)
2401 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2405 case NETDEV_CHANGEMTU
:
2406 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2407 rt6_mtu_change(dev
, dev
->mtu
);
2408 idev
->cnf
.mtu6
= dev
->mtu
;
2412 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2413 idev
= ipv6_add_dev(dev
);
2418 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2421 case NETDEV_UNREGISTER
:
2423 * Remove all addresses from this interface.
2425 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2428 case NETDEV_CHANGENAME
:
2430 snmp6_unregister_dev(idev
);
2431 addrconf_sysctl_unregister(idev
);
2432 addrconf_sysctl_register(idev
);
2433 err
= snmp6_register_dev(idev
);
2435 return notifier_from_errno(err
);
2444 * addrconf module should be notified of a device going up
2446 static struct notifier_block ipv6_dev_notf
= {
2447 .notifier_call
= addrconf_notify
,
2451 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2453 struct inet6_dev
*idev
;
2454 struct inet6_ifaddr
*ifa
, **bifa
;
2459 if (dev
== init_net
.loopback_dev
&& how
== 1)
2463 neigh_ifdown(&nd_tbl
, dev
);
2465 idev
= __in6_dev_get(dev
);
2469 /* Step 1: remove reference to ipv6 device from parent device.
2475 /* protected by rtnl_lock */
2476 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2478 /* Step 1.5: remove snmp6 entry */
2479 snmp6_unregister_dev(idev
);
2483 /* Step 2: clear hash table */
2484 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2485 bifa
= &inet6_addr_lst
[i
];
2487 write_lock_bh(&addrconf_hash_lock
);
2488 while ((ifa
= *bifa
) != NULL
) {
2489 if (ifa
->idev
== idev
) {
2490 *bifa
= ifa
->lst_next
;
2491 ifa
->lst_next
= NULL
;
2492 addrconf_del_timer(ifa
);
2496 bifa
= &ifa
->lst_next
;
2498 write_unlock_bh(&addrconf_hash_lock
);
2501 write_lock_bh(&idev
->lock
);
2503 /* Step 3: clear flags for stateless addrconf */
2505 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2507 /* Step 4: clear address list */
2508 #ifdef CONFIG_IPV6_PRIVACY
2509 if (how
== 1 && del_timer(&idev
->regen_timer
))
2512 /* clear tempaddr list */
2513 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2514 idev
->tempaddr_list
= ifa
->tmp_next
;
2515 ifa
->tmp_next
= NULL
;
2517 write_unlock_bh(&idev
->lock
);
2518 spin_lock_bh(&ifa
->lock
);
2521 in6_ifa_put(ifa
->ifpub
);
2524 spin_unlock_bh(&ifa
->lock
);
2526 write_lock_bh(&idev
->lock
);
2529 while ((ifa
= idev
->addr_list
) != NULL
) {
2530 idev
->addr_list
= ifa
->if_next
;
2531 ifa
->if_next
= NULL
;
2533 addrconf_del_timer(ifa
);
2534 write_unlock_bh(&idev
->lock
);
2536 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2537 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2540 write_lock_bh(&idev
->lock
);
2542 write_unlock_bh(&idev
->lock
);
2544 /* Step 5: Discard multicast list */
2547 ipv6_mc_destroy_dev(idev
);
2551 idev
->tstamp
= jiffies
;
2553 /* Shot the device (if unregistered) */
2556 addrconf_sysctl_unregister(idev
);
2557 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2558 neigh_ifdown(&nd_tbl
, dev
);
2564 static void addrconf_rs_timer(unsigned long data
)
2566 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2568 if (ifp
->idev
->cnf
.forwarding
)
2571 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2573 * Announcement received after solicitation
2579 spin_lock(&ifp
->lock
);
2580 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2581 struct in6_addr all_routers
;
2583 /* The wait after the last probe can be shorter */
2584 addrconf_mod_timer(ifp
, AC_RS
,
2585 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2586 ifp
->idev
->cnf
.rtr_solicit_delay
:
2587 ifp
->idev
->cnf
.rtr_solicit_interval
);
2588 spin_unlock(&ifp
->lock
);
2590 ipv6_addr_all_routers(&all_routers
);
2592 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2594 spin_unlock(&ifp
->lock
);
2596 * Note: we do not support deprecated "all on-link"
2597 * assumption any longer.
2599 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2600 ifp
->idev
->dev
->name
);
2608 * Duplicate Address Detection
2610 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2612 unsigned long rand_num
;
2613 struct inet6_dev
*idev
= ifp
->idev
;
2615 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2618 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2620 ifp
->probes
= idev
->cnf
.dad_transmits
;
2621 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2624 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2626 struct inet6_dev
*idev
= ifp
->idev
;
2627 struct net_device
*dev
= idev
->dev
;
2629 addrconf_join_solict(dev
, &ifp
->addr
);
2631 net_srandom(ifp
->addr
.s6_addr32
[3]);
2633 read_lock_bh(&idev
->lock
);
2636 spin_lock_bh(&ifp
->lock
);
2638 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2639 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2640 ifp
->flags
& IFA_F_NODAD
) {
2641 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2642 spin_unlock_bh(&ifp
->lock
);
2643 read_unlock_bh(&idev
->lock
);
2645 addrconf_dad_completed(ifp
);
2649 if (!(idev
->if_flags
& IF_READY
)) {
2650 spin_unlock_bh(&ifp
->lock
);
2651 read_unlock_bh(&idev
->lock
);
2653 * If the defice is not ready:
2654 * - keep it tentative if it is a permanent address.
2655 * - otherwise, kill it.
2658 addrconf_dad_stop(ifp
);
2663 * Optimistic nodes can start receiving
2666 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2667 ip6_ins_rt(ifp
->rt
);
2669 addrconf_dad_kick(ifp
);
2670 spin_unlock_bh(&ifp
->lock
);
2672 read_unlock_bh(&idev
->lock
);
2675 static void addrconf_dad_timer(unsigned long data
)
2677 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2678 struct inet6_dev
*idev
= ifp
->idev
;
2679 struct in6_addr unspec
;
2680 struct in6_addr mcaddr
;
2682 read_lock_bh(&idev
->lock
);
2684 read_unlock_bh(&idev
->lock
);
2687 spin_lock_bh(&ifp
->lock
);
2688 if (ifp
->probes
== 0) {
2690 * DAD was successful
2693 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2694 spin_unlock_bh(&ifp
->lock
);
2695 read_unlock_bh(&idev
->lock
);
2697 addrconf_dad_completed(ifp
);
2703 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2704 spin_unlock_bh(&ifp
->lock
);
2705 read_unlock_bh(&idev
->lock
);
2707 /* send a neighbour solicitation for our addr */
2708 memset(&unspec
, 0, sizeof(unspec
));
2709 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2710 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2715 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2717 struct net_device
* dev
= ifp
->idev
->dev
;
2720 * Configure the address for reception. Now it is valid.
2723 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2725 /* If added prefix is link local and forwarding is off,
2726 start sending router solicitations.
2729 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2730 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2731 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2732 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2733 struct in6_addr all_routers
;
2735 ipv6_addr_all_routers(&all_routers
);
2738 * If a host as already performed a random delay
2739 * [...] as part of DAD [...] there is no need
2740 * to delay again before sending the first RS
2742 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2744 spin_lock_bh(&ifp
->lock
);
2746 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2747 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2748 spin_unlock_bh(&ifp
->lock
);
2752 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2753 struct inet6_ifaddr
*ifp
;
2755 read_lock_bh(&idev
->lock
);
2756 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2757 spin_lock_bh(&ifp
->lock
);
2758 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2759 spin_unlock_bh(&ifp
->lock
);
2762 spin_unlock_bh(&ifp
->lock
);
2763 addrconf_dad_kick(ifp
);
2765 read_unlock_bh(&idev
->lock
);
2768 #ifdef CONFIG_PROC_FS
2769 struct if6_iter_state
{
2770 struct seq_net_private p
;
2774 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2776 struct inet6_ifaddr
*ifa
= NULL
;
2777 struct if6_iter_state
*state
= seq
->private;
2778 struct net
*net
= state
->p
.net
;
2780 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2781 ifa
= inet6_addr_lst
[state
->bucket
];
2783 while (ifa
&& ifa
->idev
->dev
->nd_net
!= net
)
2784 ifa
= ifa
->lst_next
;
2791 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2793 struct if6_iter_state
*state
= seq
->private;
2794 struct net
*net
= state
->p
.net
;
2796 ifa
= ifa
->lst_next
;
2799 if (ifa
->idev
->dev
->nd_net
!= net
) {
2800 ifa
= ifa
->lst_next
;
2805 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2806 ifa
= inet6_addr_lst
[state
->bucket
];
2813 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2815 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2818 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2820 return pos
? NULL
: ifa
;
2823 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2824 __acquires(addrconf_hash_lock
)
2826 read_lock_bh(&addrconf_hash_lock
);
2827 return if6_get_idx(seq
, *pos
);
2830 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2832 struct inet6_ifaddr
*ifa
;
2834 ifa
= if6_get_next(seq
, v
);
2839 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2840 __releases(addrconf_hash_lock
)
2842 read_unlock_bh(&addrconf_hash_lock
);
2845 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2847 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2849 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2851 ifp
->idev
->dev
->ifindex
,
2855 ifp
->idev
->dev
->name
);
2859 static const struct seq_operations if6_seq_ops
= {
2860 .start
= if6_seq_start
,
2861 .next
= if6_seq_next
,
2862 .show
= if6_seq_show
,
2863 .stop
= if6_seq_stop
,
2866 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2868 return seq_open_net(inode
, file
, &if6_seq_ops
,
2869 sizeof(struct if6_iter_state
));
2872 static const struct file_operations if6_fops
= {
2873 .owner
= THIS_MODULE
,
2874 .open
= if6_seq_open
,
2876 .llseek
= seq_lseek
,
2877 .release
= seq_release_net
,
2880 static int if6_proc_net_init(struct net
*net
)
2882 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
2887 static void if6_proc_net_exit(struct net
*net
)
2889 proc_net_remove(net
, "if_inet6");
2892 static struct pernet_operations if6_proc_net_ops
= {
2893 .init
= if6_proc_net_init
,
2894 .exit
= if6_proc_net_exit
,
2897 int __init
if6_proc_init(void)
2899 return register_pernet_subsys(&if6_proc_net_ops
);
2902 void if6_proc_exit(void)
2904 unregister_pernet_subsys(&if6_proc_net_ops
);
2906 #endif /* CONFIG_PROC_FS */
2908 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
2909 /* Check if address is a home address configured on any interface. */
2910 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
2913 struct inet6_ifaddr
* ifp
;
2914 u8 hash
= ipv6_addr_hash(addr
);
2915 read_lock_bh(&addrconf_hash_lock
);
2916 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2917 if (ifp
->idev
->dev
->nd_net
!= net
)
2919 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2920 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2925 read_unlock_bh(&addrconf_hash_lock
);
2931 * Periodic address status verification
2934 static void addrconf_verify(unsigned long foo
)
2936 struct inet6_ifaddr
*ifp
;
2937 unsigned long now
, next
;
2940 spin_lock_bh(&addrconf_verify_lock
);
2942 next
= now
+ ADDR_CHECK_FREQUENCY
;
2944 del_timer(&addr_chk_timer
);
2946 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2949 read_lock(&addrconf_hash_lock
);
2950 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2952 #ifdef CONFIG_IPV6_PRIVACY
2953 unsigned long regen_advance
;
2956 if (ifp
->flags
& IFA_F_PERMANENT
)
2959 spin_lock(&ifp
->lock
);
2960 age
= (now
- ifp
->tstamp
) / HZ
;
2962 #ifdef CONFIG_IPV6_PRIVACY
2963 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2964 ifp
->idev
->cnf
.dad_transmits
*
2965 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2968 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2969 age
>= ifp
->valid_lft
) {
2970 spin_unlock(&ifp
->lock
);
2972 read_unlock(&addrconf_hash_lock
);
2975 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2976 spin_unlock(&ifp
->lock
);
2978 } else if (age
>= ifp
->prefered_lft
) {
2979 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2982 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2984 ifp
->flags
|= IFA_F_DEPRECATED
;
2987 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2988 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2990 spin_unlock(&ifp
->lock
);
2994 read_unlock(&addrconf_hash_lock
);
2996 ipv6_ifa_notify(0, ifp
);
3000 #ifdef CONFIG_IPV6_PRIVACY
3001 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3002 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3003 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3004 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3005 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3006 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3007 if (!ifp
->regen_count
&& ifpub
) {
3010 in6_ifa_hold(ifpub
);
3011 spin_unlock(&ifp
->lock
);
3012 read_unlock(&addrconf_hash_lock
);
3013 spin_lock(&ifpub
->lock
);
3014 ifpub
->regen_count
= 0;
3015 spin_unlock(&ifpub
->lock
);
3016 ipv6_create_tempaddr(ifpub
, ifp
);
3021 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3022 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3023 spin_unlock(&ifp
->lock
);
3026 /* ifp->prefered_lft <= ifp->valid_lft */
3027 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3028 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3029 spin_unlock(&ifp
->lock
);
3032 read_unlock(&addrconf_hash_lock
);
3035 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
3036 add_timer(&addr_chk_timer
);
3037 spin_unlock_bh(&addrconf_verify_lock
);
3040 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3042 struct in6_addr
*pfx
= NULL
;
3045 pfx
= nla_data(addr
);
3048 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3051 pfx
= nla_data(local
);
3057 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3058 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3059 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3060 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3064 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3066 struct net
*net
= skb
->sk
->sk_net
;
3067 struct ifaddrmsg
*ifm
;
3068 struct nlattr
*tb
[IFA_MAX
+1];
3069 struct in6_addr
*pfx
;
3072 if (net
!= &init_net
)
3075 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3079 ifm
= nlmsg_data(nlh
);
3080 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3084 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3087 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3088 u32 prefered_lft
, u32 valid_lft
)
3090 u32 flags
= RTF_EXPIRES
;
3092 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3095 if (valid_lft
== INFINITY_LIFE_TIME
) {
3096 ifa_flags
|= IFA_F_PERMANENT
;
3098 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
3099 valid_lft
= 0x7FFFFFFF/HZ
;
3101 if (prefered_lft
== 0)
3102 ifa_flags
|= IFA_F_DEPRECATED
;
3103 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
3104 (prefered_lft
!= INFINITY_LIFE_TIME
))
3105 prefered_lft
= 0x7FFFFFFF/HZ
;
3107 spin_lock_bh(&ifp
->lock
);
3108 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3109 ifp
->tstamp
= jiffies
;
3110 ifp
->valid_lft
= valid_lft
;
3111 ifp
->prefered_lft
= prefered_lft
;
3113 spin_unlock_bh(&ifp
->lock
);
3114 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3115 ipv6_ifa_notify(0, ifp
);
3117 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3118 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3125 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3127 struct net
*net
= skb
->sk
->sk_net
;
3128 struct ifaddrmsg
*ifm
;
3129 struct nlattr
*tb
[IFA_MAX
+1];
3130 struct in6_addr
*pfx
;
3131 struct inet6_ifaddr
*ifa
;
3132 struct net_device
*dev
;
3133 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3137 if (net
!= &init_net
)
3140 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3144 ifm
= nlmsg_data(nlh
);
3145 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3149 if (tb
[IFA_CACHEINFO
]) {
3150 struct ifa_cacheinfo
*ci
;
3152 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3153 valid_lft
= ci
->ifa_valid
;
3154 preferred_lft
= ci
->ifa_prefered
;
3156 preferred_lft
= INFINITY_LIFE_TIME
;
3157 valid_lft
= INFINITY_LIFE_TIME
;
3160 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3164 /* We ignore other flags so far. */
3165 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3167 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3170 * It would be best to check for !NLM_F_CREATE here but
3171 * userspace alreay relies on not having to provide this.
3173 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3174 ifa_flags
, preferred_lft
, valid_lft
);
3177 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3178 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3181 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3188 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3189 u8 scope
, int ifindex
)
3191 struct ifaddrmsg
*ifm
;
3193 ifm
= nlmsg_data(nlh
);
3194 ifm
->ifa_family
= AF_INET6
;
3195 ifm
->ifa_prefixlen
= prefixlen
;
3196 ifm
->ifa_flags
= flags
;
3197 ifm
->ifa_scope
= scope
;
3198 ifm
->ifa_index
= ifindex
;
3201 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3202 unsigned long tstamp
, u32 preferred
, u32 valid
)
3204 struct ifa_cacheinfo ci
;
3206 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3207 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3208 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3209 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3210 ci
.ifa_prefered
= preferred
;
3211 ci
.ifa_valid
= valid
;
3213 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3216 static inline int rt_scope(int ifa_scope
)
3218 if (ifa_scope
& IFA_HOST
)
3219 return RT_SCOPE_HOST
;
3220 else if (ifa_scope
& IFA_LINK
)
3221 return RT_SCOPE_LINK
;
3222 else if (ifa_scope
& IFA_SITE
)
3223 return RT_SCOPE_SITE
;
3225 return RT_SCOPE_UNIVERSE
;
3228 static inline int inet6_ifaddr_msgsize(void)
3230 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3231 + nla_total_size(16) /* IFA_ADDRESS */
3232 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3235 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3236 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3238 struct nlmsghdr
*nlh
;
3239 u32 preferred
, valid
;
3241 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3245 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3246 ifa
->idev
->dev
->ifindex
);
3248 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3249 preferred
= ifa
->prefered_lft
;
3250 valid
= ifa
->valid_lft
;
3251 if (preferred
!= INFINITY_LIFE_TIME
) {
3252 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3254 if (valid
!= INFINITY_LIFE_TIME
)
3258 preferred
= INFINITY_LIFE_TIME
;
3259 valid
= INFINITY_LIFE_TIME
;
3262 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3263 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3264 nlmsg_cancel(skb
, nlh
);
3268 return nlmsg_end(skb
, nlh
);
3271 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3272 u32 pid
, u32 seq
, int event
, u16 flags
)
3274 struct nlmsghdr
*nlh
;
3275 u8 scope
= RT_SCOPE_UNIVERSE
;
3276 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3278 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3279 scope
= RT_SCOPE_SITE
;
3281 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3285 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3286 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3287 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3288 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3289 nlmsg_cancel(skb
, nlh
);
3293 return nlmsg_end(skb
, nlh
);
3296 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3297 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3299 struct nlmsghdr
*nlh
;
3300 u8 scope
= RT_SCOPE_UNIVERSE
;
3301 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3303 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3304 scope
= RT_SCOPE_SITE
;
3306 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3310 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3311 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3312 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3313 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3314 nlmsg_cancel(skb
, nlh
);
3318 return nlmsg_end(skb
, nlh
);
3328 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3329 enum addr_type_t type
)
3332 int s_idx
, s_ip_idx
;
3334 struct net_device
*dev
;
3335 struct inet6_dev
*idev
= NULL
;
3336 struct inet6_ifaddr
*ifa
;
3337 struct ifmcaddr6
*ifmca
;
3338 struct ifacaddr6
*ifaca
;
3340 s_idx
= cb
->args
[0];
3341 s_ip_idx
= ip_idx
= cb
->args
[1];
3344 for_each_netdev(&init_net
, dev
) {
3350 if ((idev
= in6_dev_get(dev
)) == NULL
)
3352 read_lock_bh(&idev
->lock
);
3355 /* unicast address incl. temp addr */
3356 for (ifa
= idev
->addr_list
; ifa
;
3357 ifa
= ifa
->if_next
, ip_idx
++) {
3358 if (ip_idx
< s_ip_idx
)
3360 err
= inet6_fill_ifaddr(skb
, ifa
,
3361 NETLINK_CB(cb
->skb
).pid
,
3367 case MULTICAST_ADDR
:
3368 /* multicast address */
3369 for (ifmca
= idev
->mc_list
; ifmca
;
3370 ifmca
= ifmca
->next
, ip_idx
++) {
3371 if (ip_idx
< s_ip_idx
)
3373 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3374 NETLINK_CB(cb
->skb
).pid
,
3381 /* anycast address */
3382 for (ifaca
= idev
->ac_list
; ifaca
;
3383 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3384 if (ip_idx
< s_ip_idx
)
3386 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3387 NETLINK_CB(cb
->skb
).pid
,
3396 read_unlock_bh(&idev
->lock
);
3405 cb
->args
[1] = ip_idx
;
3409 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3411 struct net
*net
= skb
->sk
->sk_net
;
3412 enum addr_type_t type
= UNICAST_ADDR
;
3414 if (net
!= &init_net
)
3417 return inet6_dump_addr(skb
, cb
, type
);
3420 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3422 struct net
*net
= skb
->sk
->sk_net
;
3423 enum addr_type_t type
= MULTICAST_ADDR
;
3425 if (net
!= &init_net
)
3428 return inet6_dump_addr(skb
, cb
, type
);
3432 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3434 struct net
*net
= skb
->sk
->sk_net
;
3435 enum addr_type_t type
= ANYCAST_ADDR
;
3437 if (net
!= &init_net
)
3440 return inet6_dump_addr(skb
, cb
, type
);
3443 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3446 struct net
*net
= in_skb
->sk
->sk_net
;
3447 struct ifaddrmsg
*ifm
;
3448 struct nlattr
*tb
[IFA_MAX
+1];
3449 struct in6_addr
*addr
= NULL
;
3450 struct net_device
*dev
= NULL
;
3451 struct inet6_ifaddr
*ifa
;
3452 struct sk_buff
*skb
;
3455 if (net
!= &init_net
)
3458 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3462 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3468 ifm
= nlmsg_data(nlh
);
3470 dev
= __dev_get_by_index(&init_net
, ifm
->ifa_index
);
3472 if ((ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1)) == NULL
) {
3473 err
= -EADDRNOTAVAIL
;
3477 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3482 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3483 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3485 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3486 WARN_ON(err
== -EMSGSIZE
);
3490 err
= rtnl_unicast(skb
, &init_net
, NETLINK_CB(in_skb
).pid
);
3497 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3499 struct sk_buff
*skb
;
3502 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3506 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3508 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3509 WARN_ON(err
== -EMSGSIZE
);
3513 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3516 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3519 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3520 __s32
*array
, int bytes
)
3522 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3524 memset(array
, 0, bytes
);
3525 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3526 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3527 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3528 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3529 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3530 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3531 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3532 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3533 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3534 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3535 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3536 #ifdef CONFIG_IPV6_PRIVACY
3537 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3538 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3539 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3540 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3541 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3543 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3544 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3545 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3546 #ifdef CONFIG_IPV6_ROUTER_PREF
3547 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3548 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3549 #ifdef CONFIG_IPV6_ROUTE_INFO
3550 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3553 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3554 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3555 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3556 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3560 static inline size_t inet6_if_nlmsg_size(void)
3562 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3563 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3564 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3565 + nla_total_size(4) /* IFLA_MTU */
3566 + nla_total_size(4) /* IFLA_LINK */
3567 + nla_total_size( /* IFLA_PROTINFO */
3568 nla_total_size(4) /* IFLA_INET6_FLAGS */
3569 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3570 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3571 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3572 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3576 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3580 int pad
= bytes
- sizeof(u64
) * items
;
3583 /* Use put_unaligned() because stats may not be aligned for u64. */
3584 put_unaligned(items
, &stats
[0]);
3585 for (i
= 1; i
< items
; i
++)
3586 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3588 memset(&stats
[items
], 0, pad
);
3591 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3595 case IFLA_INET6_STATS
:
3596 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3598 case IFLA_INET6_ICMP6STATS
:
3599 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3604 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3605 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3607 struct net_device
*dev
= idev
->dev
;
3609 struct ifinfomsg
*hdr
;
3610 struct nlmsghdr
*nlh
;
3612 struct ifla_cacheinfo ci
;
3614 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3618 hdr
= nlmsg_data(nlh
);
3619 hdr
->ifi_family
= AF_INET6
;
3621 hdr
->ifi_type
= dev
->type
;
3622 hdr
->ifi_index
= dev
->ifindex
;
3623 hdr
->ifi_flags
= dev_get_flags(dev
);
3624 hdr
->ifi_change
= 0;
3626 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3629 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3631 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3632 if (dev
->ifindex
!= dev
->iflink
)
3633 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3635 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3636 if (protoinfo
== NULL
)
3637 goto nla_put_failure
;
3639 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3641 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3642 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3643 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3644 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3645 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3646 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3648 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3650 goto nla_put_failure
;
3651 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3653 /* XXX - MC not implemented */
3655 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3657 goto nla_put_failure
;
3658 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3660 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3662 goto nla_put_failure
;
3663 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3665 nla_nest_end(skb
, protoinfo
);
3666 return nlmsg_end(skb
, nlh
);
3669 nlmsg_cancel(skb
, nlh
);
3673 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3675 struct net
*net
= skb
->sk
->sk_net
;
3677 int s_idx
= cb
->args
[0];
3678 struct net_device
*dev
;
3679 struct inet6_dev
*idev
;
3681 if (net
!= &init_net
)
3684 read_lock(&dev_base_lock
);
3686 for_each_netdev(&init_net
, dev
) {
3689 if ((idev
= in6_dev_get(dev
)) == NULL
)
3691 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3692 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3699 read_unlock(&dev_base_lock
);
3705 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3707 struct sk_buff
*skb
;
3710 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3714 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3716 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3717 WARN_ON(err
== -EMSGSIZE
);
3721 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3724 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_IFADDR
, err
);
3727 static inline size_t inet6_prefix_nlmsg_size(void)
3729 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3730 + nla_total_size(sizeof(struct in6_addr
))
3731 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3734 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3735 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3736 int event
, unsigned int flags
)
3738 struct prefixmsg
*pmsg
;
3739 struct nlmsghdr
*nlh
;
3740 struct prefix_cacheinfo ci
;
3742 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3746 pmsg
= nlmsg_data(nlh
);
3747 pmsg
->prefix_family
= AF_INET6
;
3748 pmsg
->prefix_pad1
= 0;
3749 pmsg
->prefix_pad2
= 0;
3750 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3751 pmsg
->prefix_len
= pinfo
->prefix_len
;
3752 pmsg
->prefix_type
= pinfo
->type
;
3753 pmsg
->prefix_pad3
= 0;
3754 pmsg
->prefix_flags
= 0;
3756 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3757 if (pinfo
->autoconf
)
3758 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3760 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3762 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3763 ci
.valid_time
= ntohl(pinfo
->valid
);
3764 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3766 return nlmsg_end(skb
, nlh
);
3769 nlmsg_cancel(skb
, nlh
);
3773 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3774 struct prefix_info
*pinfo
)
3776 struct sk_buff
*skb
;
3779 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3783 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3785 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3786 WARN_ON(err
== -EMSGSIZE
);
3790 err
= rtnl_notify(skb
, &init_net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3793 rtnl_set_sk_err(&init_net
, RTNLGRP_IPV6_PREFIX
, err
);
3796 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3798 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3803 * If the address was optimistic
3804 * we inserted the route at the start of
3805 * our DAD process, so we don't need
3808 if (!(ifp
->rt
->rt6i_node
))
3809 ip6_ins_rt(ifp
->rt
);
3810 if (ifp
->idev
->cnf
.forwarding
)
3811 addrconf_join_anycast(ifp
);
3814 if (ifp
->idev
->cnf
.forwarding
)
3815 addrconf_leave_anycast(ifp
);
3816 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3817 dst_hold(&ifp
->rt
->u
.dst
);
3818 if (ip6_del_rt(ifp
->rt
))
3819 dst_free(&ifp
->rt
->u
.dst
);
3824 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3827 if (likely(ifp
->idev
->dead
== 0))
3828 __ipv6_ifa_notify(event
, ifp
);
3829 rcu_read_unlock_bh();
3832 #ifdef CONFIG_SYSCTL
3835 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3836 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3838 int *valp
= ctl
->data
;
3842 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3845 addrconf_fixup_forwarding(ctl
, valp
, val
);
3849 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3850 int __user
*name
, int nlen
,
3851 void __user
*oldval
,
3852 size_t __user
*oldlenp
,
3853 void __user
*newval
, size_t newlen
)
3855 int *valp
= table
->data
;
3859 if (!newval
|| !newlen
)
3861 if (newlen
!= sizeof(int))
3863 if (get_user(new, (int __user
*)newval
))
3867 if (oldval
&& oldlenp
) {
3869 if (get_user(len
, oldlenp
))
3872 if (len
> table
->maxlen
)
3873 len
= table
->maxlen
;
3874 if (copy_to_user(oldval
, valp
, len
))
3876 if (put_user(len
, oldlenp
))
3882 addrconf_fixup_forwarding(table
, valp
, val
);
3886 static struct addrconf_sysctl_table
3888 struct ctl_table_header
*sysctl_header
;
3889 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3891 } addrconf_sysctl __read_mostly
= {
3892 .sysctl_header
= NULL
,
3895 .ctl_name
= NET_IPV6_FORWARDING
,
3896 .procname
= "forwarding",
3897 .data
= &ipv6_devconf
.forwarding
,
3898 .maxlen
= sizeof(int),
3900 .proc_handler
= &addrconf_sysctl_forward
,
3901 .strategy
= &addrconf_sysctl_forward_strategy
,
3904 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3905 .procname
= "hop_limit",
3906 .data
= &ipv6_devconf
.hop_limit
,
3907 .maxlen
= sizeof(int),
3909 .proc_handler
= proc_dointvec
,
3912 .ctl_name
= NET_IPV6_MTU
,
3914 .data
= &ipv6_devconf
.mtu6
,
3915 .maxlen
= sizeof(int),
3917 .proc_handler
= &proc_dointvec
,
3920 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3921 .procname
= "accept_ra",
3922 .data
= &ipv6_devconf
.accept_ra
,
3923 .maxlen
= sizeof(int),
3925 .proc_handler
= &proc_dointvec
,
3928 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3929 .procname
= "accept_redirects",
3930 .data
= &ipv6_devconf
.accept_redirects
,
3931 .maxlen
= sizeof(int),
3933 .proc_handler
= &proc_dointvec
,
3936 .ctl_name
= NET_IPV6_AUTOCONF
,
3937 .procname
= "autoconf",
3938 .data
= &ipv6_devconf
.autoconf
,
3939 .maxlen
= sizeof(int),
3941 .proc_handler
= &proc_dointvec
,
3944 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3945 .procname
= "dad_transmits",
3946 .data
= &ipv6_devconf
.dad_transmits
,
3947 .maxlen
= sizeof(int),
3949 .proc_handler
= &proc_dointvec
,
3952 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3953 .procname
= "router_solicitations",
3954 .data
= &ipv6_devconf
.rtr_solicits
,
3955 .maxlen
= sizeof(int),
3957 .proc_handler
= &proc_dointvec
,
3960 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3961 .procname
= "router_solicitation_interval",
3962 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3963 .maxlen
= sizeof(int),
3965 .proc_handler
= &proc_dointvec_jiffies
,
3966 .strategy
= &sysctl_jiffies
,
3969 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3970 .procname
= "router_solicitation_delay",
3971 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3972 .maxlen
= sizeof(int),
3974 .proc_handler
= &proc_dointvec_jiffies
,
3975 .strategy
= &sysctl_jiffies
,
3978 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3979 .procname
= "force_mld_version",
3980 .data
= &ipv6_devconf
.force_mld_version
,
3981 .maxlen
= sizeof(int),
3983 .proc_handler
= &proc_dointvec
,
3985 #ifdef CONFIG_IPV6_PRIVACY
3987 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3988 .procname
= "use_tempaddr",
3989 .data
= &ipv6_devconf
.use_tempaddr
,
3990 .maxlen
= sizeof(int),
3992 .proc_handler
= &proc_dointvec
,
3995 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3996 .procname
= "temp_valid_lft",
3997 .data
= &ipv6_devconf
.temp_valid_lft
,
3998 .maxlen
= sizeof(int),
4000 .proc_handler
= &proc_dointvec
,
4003 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
4004 .procname
= "temp_prefered_lft",
4005 .data
= &ipv6_devconf
.temp_prefered_lft
,
4006 .maxlen
= sizeof(int),
4008 .proc_handler
= &proc_dointvec
,
4011 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
4012 .procname
= "regen_max_retry",
4013 .data
= &ipv6_devconf
.regen_max_retry
,
4014 .maxlen
= sizeof(int),
4016 .proc_handler
= &proc_dointvec
,
4019 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
4020 .procname
= "max_desync_factor",
4021 .data
= &ipv6_devconf
.max_desync_factor
,
4022 .maxlen
= sizeof(int),
4024 .proc_handler
= &proc_dointvec
,
4028 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
4029 .procname
= "max_addresses",
4030 .data
= &ipv6_devconf
.max_addresses
,
4031 .maxlen
= sizeof(int),
4033 .proc_handler
= &proc_dointvec
,
4036 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
4037 .procname
= "accept_ra_defrtr",
4038 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4039 .maxlen
= sizeof(int),
4041 .proc_handler
= &proc_dointvec
,
4044 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
4045 .procname
= "accept_ra_pinfo",
4046 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4047 .maxlen
= sizeof(int),
4049 .proc_handler
= &proc_dointvec
,
4051 #ifdef CONFIG_IPV6_ROUTER_PREF
4053 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
4054 .procname
= "accept_ra_rtr_pref",
4055 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4056 .maxlen
= sizeof(int),
4058 .proc_handler
= &proc_dointvec
,
4061 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4062 .procname
= "router_probe_interval",
4063 .data
= &ipv6_devconf
.rtr_probe_interval
,
4064 .maxlen
= sizeof(int),
4066 .proc_handler
= &proc_dointvec_jiffies
,
4067 .strategy
= &sysctl_jiffies
,
4069 #ifdef CONFIG_IPV6_ROUTE_INFO
4071 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4072 .procname
= "accept_ra_rt_info_max_plen",
4073 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4074 .maxlen
= sizeof(int),
4076 .proc_handler
= &proc_dointvec
,
4081 .ctl_name
= NET_IPV6_PROXY_NDP
,
4082 .procname
= "proxy_ndp",
4083 .data
= &ipv6_devconf
.proxy_ndp
,
4084 .maxlen
= sizeof(int),
4086 .proc_handler
= &proc_dointvec
,
4089 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4090 .procname
= "accept_source_route",
4091 .data
= &ipv6_devconf
.accept_source_route
,
4092 .maxlen
= sizeof(int),
4094 .proc_handler
= &proc_dointvec
,
4096 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4098 .ctl_name
= CTL_UNNUMBERED
,
4099 .procname
= "optimistic_dad",
4100 .data
= &ipv6_devconf
.optimistic_dad
,
4101 .maxlen
= sizeof(int),
4103 .proc_handler
= &proc_dointvec
,
4108 .ctl_name
= 0, /* sentinel */
4113 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4114 int ctl_name
, struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4117 struct addrconf_sysctl_table
*t
;
4119 #define ADDRCONF_CTL_PATH_DEV 3
4121 struct ctl_path addrconf_ctl_path
[] = {
4122 { .procname
= "net", .ctl_name
= CTL_NET
, },
4123 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
4124 { .procname
= "conf", .ctl_name
= NET_IPV6_CONF
, },
4125 { /* to be set */ },
4130 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4134 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4135 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4136 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4137 t
->addrconf_vars
[i
].extra2
= net
;
4141 * Make a copy of dev_name, because '.procname' is regarded as const
4142 * by sysctl and we wouldn't want anyone to change it under our feet
4143 * (see SIOCSIFNAME).
4145 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4149 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4150 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].ctl_name
= ctl_name
;
4152 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4154 if (t
->sysctl_header
== NULL
)
4168 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4170 struct addrconf_sysctl_table
*t
;
4172 if (p
->sysctl
== NULL
)
4177 unregister_sysctl_table(t
->sysctl_header
);
4182 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4184 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, NET_IPV6
,
4185 NET_IPV6_NEIGH
, "ipv6",
4186 &ndisc_ifinfo_sysctl_change
,
4188 __addrconf_sysctl_register(idev
->dev
->nd_net
, idev
->dev
->name
,
4189 idev
->dev
->ifindex
, idev
, &idev
->cnf
);
4192 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4194 __addrconf_sysctl_unregister(&idev
->cnf
);
4195 neigh_sysctl_unregister(idev
->nd_parms
);
4201 static int addrconf_init_net(struct net
*net
)
4204 struct ipv6_devconf
*all
, *dflt
;
4207 all
= &ipv6_devconf
;
4208 dflt
= &ipv6_devconf_dflt
;
4210 if (net
!= &init_net
) {
4211 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4215 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4217 goto err_alloc_dflt
;
4220 net
->ipv6
.devconf_all
= all
;
4221 net
->ipv6
.devconf_dflt
= dflt
;
4223 #ifdef CONFIG_SYSCTL
4224 err
= __addrconf_sysctl_register(net
, "all", NET_PROTO_CONF_ALL
,
4229 err
= __addrconf_sysctl_register(net
, "default", NET_PROTO_CONF_DEFAULT
,
4236 #ifdef CONFIG_SYSCTL
4238 __addrconf_sysctl_unregister(all
);
4248 static void addrconf_exit_net(struct net
*net
)
4250 #ifdef CONFIG_SYSCTL
4251 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4252 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4254 if (net
!= &init_net
) {
4255 kfree(net
->ipv6
.devconf_dflt
);
4256 kfree(net
->ipv6
.devconf_all
);
4260 static struct pernet_operations addrconf_ops
= {
4261 .init
= addrconf_init_net
,
4262 .exit
= addrconf_exit_net
,
4269 int register_inet6addr_notifier(struct notifier_block
*nb
)
4271 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4274 EXPORT_SYMBOL(register_inet6addr_notifier
);
4276 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4278 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4281 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4284 * Init / cleanup code
4287 int __init
addrconf_init(void)
4291 if ((err
= ipv6_addr_label_init()) < 0) {
4292 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4297 register_pernet_subsys(&addrconf_ops
);
4299 /* The addrconf netdev notifier requires that loopback_dev
4300 * has it's ipv6 private information allocated and setup
4301 * before it can bring up and give link-local addresses
4302 * to other devices which are up.
4304 * Unfortunately, loopback_dev is not necessarily the first
4305 * entry in the global dev_base list of net devices. In fact,
4306 * it is likely to be the very last entry on that list.
4307 * So this causes the notifier registry below to try and
4308 * give link-local addresses to all devices besides loopback_dev
4309 * first, then loopback_dev, which cases all the non-loopback_dev
4310 * devices to fail to get a link-local address.
4312 * So, as a temporary fix, allocate the ipv6 structure for
4313 * loopback_dev first by hand.
4314 * Longer term, all of the dependencies ipv6 has upon the loopback
4315 * device and it being up should be removed.
4318 if (!ipv6_add_dev(init_net
.loopback_dev
))
4324 ip6_null_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4325 ip6_null_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4326 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
4327 ip6_prohibit_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4328 ip6_prohibit_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4329 ip6_blk_hole_entry
.u
.dst
.dev
= init_net
.loopback_dev
;
4330 ip6_blk_hole_entry
.rt6i_idev
= in6_dev_get(init_net
.loopback_dev
);
4333 register_netdevice_notifier(&ipv6_dev_notf
);
4337 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4341 /* Only the first call to __rtnl_register can fail */
4342 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4343 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4344 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4345 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4346 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4348 ipv6_addr_label_rtnl_register();
4352 unregister_netdevice_notifier(&ipv6_dev_notf
);
4354 unregister_pernet_subsys(&addrconf_ops
);
4359 void addrconf_cleanup(void)
4361 struct net_device
*dev
;
4362 struct inet6_ifaddr
*ifa
;
4365 unregister_netdevice_notifier(&ipv6_dev_notf
);
4367 unregister_pernet_subsys(&addrconf_ops
);
4375 for_each_netdev(&init_net
, dev
) {
4376 if (__in6_dev_get(dev
) == NULL
)
4378 addrconf_ifdown(dev
, 1);
4380 addrconf_ifdown(init_net
.loopback_dev
, 2);
4386 write_lock_bh(&addrconf_hash_lock
);
4387 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4388 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4389 struct inet6_ifaddr
*bifa
;
4392 ifa
= ifa
->lst_next
;
4393 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4394 /* Do not free it; something is wrong.
4395 Now we can investigate it with debugger.
4399 write_unlock_bh(&addrconf_hash_lock
);
4401 del_timer(&addr_chk_timer
);