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>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <net/netlink.h>
76 #include <linux/if_tunnel.h>
77 #include <linux/rtnetlink.h>
79 #ifdef CONFIG_IPV6_PRIVACY
80 #include <linux/random.h>
83 #include <asm/uaccess.h>
85 #include <linux/proc_fs.h>
86 #include <linux/seq_file.h>
88 /* Set to 3 to get tracing... */
92 #define ADBG(x) printk x
97 #define INFINITY_LIFE_TIME 0xFFFFFFFF
98 #define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
101 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
);
102 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
);
105 #ifdef CONFIG_IPV6_PRIVACY
106 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
107 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
108 static void ipv6_regen_rndid(unsigned long data
);
110 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
113 static int ipv6_count_addresses(struct inet6_dev
*idev
);
116 * Configured unicast address hash table
118 static struct inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
119 static DEFINE_RWLOCK(addrconf_hash_lock
);
121 static void addrconf_verify(unsigned long);
123 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
124 static DEFINE_SPINLOCK(addrconf_verify_lock
);
126 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
127 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
129 static int addrconf_ifdown(struct net_device
*dev
, int how
);
131 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
132 static void addrconf_dad_timer(unsigned long data
);
133 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
134 static void addrconf_dad_run(struct inet6_dev
*idev
);
135 static void addrconf_rs_timer(unsigned long data
);
136 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
137 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
139 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
140 struct prefix_info
*pinfo
);
141 static int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
);
143 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
145 struct ipv6_devconf ipv6_devconf __read_mostly
= {
147 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
148 .mtu6
= IPV6_MIN_MTU
,
150 .accept_redirects
= 1,
152 .force_mld_version
= 0,
154 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
155 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
156 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
157 #ifdef CONFIG_IPV6_PRIVACY
159 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
160 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
161 .regen_max_retry
= REGEN_MAX_RETRY
,
162 .max_desync_factor
= MAX_DESYNC_FACTOR
,
164 .max_addresses
= IPV6_MAX_ADDRESSES
,
165 .accept_ra_defrtr
= 1,
166 .accept_ra_pinfo
= 1,
167 #ifdef CONFIG_IPV6_ROUTER_PREF
168 .accept_ra_rtr_pref
= 1,
169 .rtr_probe_interval
= 60 * HZ
,
170 #ifdef CONFIG_IPV6_ROUTE_INFO
171 .accept_ra_rt_info_max_plen
= 0,
175 .accept_source_route
= 0, /* we do not accept RH0 by default. */
178 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
180 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
181 .mtu6
= IPV6_MIN_MTU
,
183 .accept_redirects
= 1,
186 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
187 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
188 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
189 #ifdef CONFIG_IPV6_PRIVACY
191 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
192 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
193 .regen_max_retry
= REGEN_MAX_RETRY
,
194 .max_desync_factor
= MAX_DESYNC_FACTOR
,
196 .max_addresses
= IPV6_MAX_ADDRESSES
,
197 .accept_ra_defrtr
= 1,
198 .accept_ra_pinfo
= 1,
199 #ifdef CONFIG_IPV6_ROUTER_PREF
200 .accept_ra_rtr_pref
= 1,
201 .rtr_probe_interval
= 60 * HZ
,
202 #ifdef CONFIG_IPV6_ROUTE_INFO
203 .accept_ra_rt_info_max_plen
= 0,
207 .accept_source_route
= 0, /* we do not accept RH0 by default. */
210 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
212 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
214 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
216 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
218 if (del_timer(&ifp
->timer
))
222 enum addrconf_timer_t
229 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
230 enum addrconf_timer_t what
,
233 if (!del_timer(&ifp
->timer
))
238 ifp
->timer
.function
= addrconf_dad_timer
;
241 ifp
->timer
.function
= addrconf_rs_timer
;
245 ifp
->timer
.expires
= jiffies
+ when
;
246 add_timer(&ifp
->timer
);
249 /* Nobody refers to this device, we may destroy it. */
251 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
253 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
257 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
259 struct net_device
*dev
= idev
->dev
;
260 BUG_TRAP(idev
->addr_list
==NULL
);
261 BUG_TRAP(idev
->mc_list
==NULL
);
262 #ifdef NET_REFCNT_DEBUG
263 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
267 printk("Freeing alive inet6 device %p\n", idev
);
270 snmp6_free_dev(idev
);
271 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
274 EXPORT_SYMBOL(in6_dev_finish_destroy
);
276 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
278 struct inet6_dev
*ndev
;
279 struct in6_addr maddr
;
283 if (dev
->mtu
< IPV6_MIN_MTU
)
286 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
291 rwlock_init(&ndev
->lock
);
293 memcpy(&ndev
->cnf
, &ipv6_devconf_dflt
, sizeof(ndev
->cnf
));
294 ndev
->cnf
.mtu6
= dev
->mtu
;
295 ndev
->cnf
.sysctl
= NULL
;
296 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
297 if (ndev
->nd_parms
== NULL
) {
301 /* We refer to the device */
304 if (snmp6_alloc_dev(ndev
) < 0) {
306 "%s(): cannot allocate memory for statistics; dev=%s.\n",
307 __FUNCTION__
, dev
->name
));
308 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
310 in6_dev_finish_destroy(ndev
);
314 if (snmp6_register_dev(ndev
) < 0) {
316 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
317 __FUNCTION__
, dev
->name
));
318 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
320 in6_dev_finish_destroy(ndev
);
324 /* One reference from device. We must do this before
325 * we invoke __ipv6_regen_rndid().
329 #ifdef CONFIG_IPV6_PRIVACY
330 init_timer(&ndev
->regen_timer
);
331 ndev
->regen_timer
.function
= ipv6_regen_rndid
;
332 ndev
->regen_timer
.data
= (unsigned long) ndev
;
333 if ((dev
->flags
&IFF_LOOPBACK
) ||
334 dev
->type
== ARPHRD_TUNNEL
||
335 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
336 dev
->type
== ARPHRD_SIT
||
338 dev
->type
== ARPHRD_NONE
) {
340 "%s: Disabled Privacy Extensions\n",
342 ndev
->cnf
.use_tempaddr
= -1;
345 ipv6_regen_rndid((unsigned long) ndev
);
349 if (netif_running(dev
) && netif_carrier_ok(dev
))
350 ndev
->if_flags
|= IF_READY
;
352 ipv6_mc_init_dev(ndev
);
353 ndev
->tstamp
= jiffies
;
355 neigh_sysctl_register(dev
, ndev
->nd_parms
, NET_IPV6
,
356 NET_IPV6_NEIGH
, "ipv6",
357 &ndisc_ifinfo_sysctl_change
,
359 addrconf_sysctl_register(ndev
, &ndev
->cnf
);
361 /* protected by rtnl_lock */
362 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
364 /* Join all-node multicast group */
365 ipv6_addr_all_nodes(&maddr
);
366 ipv6_dev_mc_inc(dev
, &maddr
);
371 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
373 struct inet6_dev
*idev
;
377 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
378 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
382 if (dev
->flags
&IFF_UP
)
388 static void dev_forward_change(struct inet6_dev
*idev
)
390 struct net_device
*dev
;
391 struct inet6_ifaddr
*ifa
;
392 struct in6_addr addr
;
397 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
398 ipv6_addr_all_routers(&addr
);
400 if (idev
->cnf
.forwarding
)
401 ipv6_dev_mc_inc(dev
, &addr
);
403 ipv6_dev_mc_dec(dev
, &addr
);
405 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
406 if (ifa
->flags
&IFA_F_TENTATIVE
)
408 if (idev
->cnf
.forwarding
)
409 addrconf_join_anycast(ifa
);
411 addrconf_leave_anycast(ifa
);
416 static void addrconf_forward_change(void)
418 struct net_device
*dev
;
419 struct inet6_dev
*idev
;
421 read_lock(&dev_base_lock
);
422 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
424 idev
= __in6_dev_get(dev
);
426 int changed
= (!idev
->cnf
.forwarding
) ^ (!ipv6_devconf
.forwarding
);
427 idev
->cnf
.forwarding
= ipv6_devconf
.forwarding
;
429 dev_forward_change(idev
);
433 read_unlock(&dev_base_lock
);
437 /* Nobody refers to this ifaddr, destroy it */
439 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
441 BUG_TRAP(ifp
->if_next
==NULL
);
442 BUG_TRAP(ifp
->lst_next
==NULL
);
443 #ifdef NET_REFCNT_DEBUG
444 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
447 in6_dev_put(ifp
->idev
);
449 if (del_timer(&ifp
->timer
))
450 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
453 printk("Freeing alive inet6 address %p\n", ifp
);
456 dst_release(&ifp
->rt
->u
.dst
);
462 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
464 struct inet6_ifaddr
*ifa
, **ifap
;
465 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
468 * Each device address list is sorted in order of scope -
469 * global before linklocal.
471 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
472 ifap
= &ifa
->if_next
) {
473 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
477 ifp
->if_next
= *ifap
;
481 /* On success it returns ifp with increased reference count */
483 static struct inet6_ifaddr
*
484 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
485 int scope
, u32 flags
)
487 struct inet6_ifaddr
*ifa
= NULL
;
494 err
= -ENODEV
; /*XXX*/
498 write_lock(&addrconf_hash_lock
);
500 /* Ignore adding duplicate addresses on an interface */
501 if (ipv6_chk_same_addr(addr
, idev
->dev
)) {
502 ADBG(("ipv6_add_addr: already assigned\n"));
507 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
510 ADBG(("ipv6_add_addr: malloc failed\n"));
515 rt
= addrconf_dst_alloc(idev
, addr
, 0);
521 ipv6_addr_copy(&ifa
->addr
, addr
);
523 spin_lock_init(&ifa
->lock
);
524 init_timer(&ifa
->timer
);
525 ifa
->timer
.data
= (unsigned long) ifa
;
527 ifa
->prefix_len
= pfxlen
;
528 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
529 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
538 /* Add to big hash table */
539 hash
= ipv6_addr_hash(addr
);
541 ifa
->lst_next
= inet6_addr_lst
[hash
];
542 inet6_addr_lst
[hash
] = ifa
;
544 write_unlock(&addrconf_hash_lock
);
546 write_lock(&idev
->lock
);
547 /* Add to inet6_dev unicast addr list. */
548 ipv6_link_dev_addr(idev
, ifa
);
550 #ifdef CONFIG_IPV6_PRIVACY
551 if (ifa
->flags
&IFA_F_TEMPORARY
) {
552 ifa
->tmp_next
= idev
->tempaddr_list
;
553 idev
->tempaddr_list
= ifa
;
559 write_unlock(&idev
->lock
);
561 rcu_read_unlock_bh();
563 if (likely(err
== 0))
564 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
572 write_unlock(&addrconf_hash_lock
);
576 /* This function wants to get referenced ifp and releases it before return */
578 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
580 struct inet6_ifaddr
*ifa
, **ifap
;
581 struct inet6_dev
*idev
= ifp
->idev
;
583 int deleted
= 0, onlink
= 0;
584 unsigned long expires
= jiffies
;
586 hash
= ipv6_addr_hash(&ifp
->addr
);
590 write_lock_bh(&addrconf_hash_lock
);
591 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
592 ifap
= &ifa
->lst_next
) {
594 *ifap
= ifa
->lst_next
;
596 ifa
->lst_next
= NULL
;
600 write_unlock_bh(&addrconf_hash_lock
);
602 write_lock_bh(&idev
->lock
);
603 #ifdef CONFIG_IPV6_PRIVACY
604 if (ifp
->flags
&IFA_F_TEMPORARY
) {
605 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
606 ifap
= &ifa
->tmp_next
) {
608 *ifap
= ifa
->tmp_next
;
610 in6_ifa_put(ifp
->ifpub
);
614 ifa
->tmp_next
= NULL
;
621 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
623 *ifap
= ifa
->if_next
;
626 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
630 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
631 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
633 if (ifa
->flags
& IFA_F_PERMANENT
) {
638 unsigned long lifetime
;
643 spin_lock(&ifa
->lock
);
644 lifetime
= min_t(unsigned long,
645 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
646 if (time_before(expires
,
647 ifa
->tstamp
+ lifetime
* HZ
))
648 expires
= ifa
->tstamp
+ lifetime
* HZ
;
649 spin_unlock(&ifa
->lock
);
653 ifap
= &ifa
->if_next
;
655 write_unlock_bh(&idev
->lock
);
657 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
659 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
661 addrconf_del_timer(ifp
);
664 * Purge or update corresponding prefix
666 * 1) we don't purge prefix here if address was not permanent.
667 * prefix is managed by its own lifetime.
668 * 2) if there're no addresses, delete prefix.
669 * 3) if there're still other permanent address(es),
670 * corresponding prefix is still permanent.
671 * 4) otherwise, update prefix lifetime to the
672 * longest valid lifetime among the corresponding
673 * addresses on the device.
674 * Note: subsequent RA will update lifetime.
678 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
679 struct in6_addr prefix
;
682 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
683 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
685 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
689 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
690 rt
->rt6i_expires
= expires
;
691 rt
->rt6i_flags
|= RTF_EXPIRES
;
694 dst_release(&rt
->u
.dst
);
700 #ifdef CONFIG_IPV6_PRIVACY
701 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
703 struct inet6_dev
*idev
= ifp
->idev
;
704 struct in6_addr addr
, *tmpaddr
;
705 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
710 write_lock(&idev
->lock
);
712 spin_lock_bh(&ift
->lock
);
713 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
714 spin_unlock_bh(&ift
->lock
);
721 if (idev
->cnf
.use_tempaddr
<= 0) {
722 write_unlock(&idev
->lock
);
724 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
729 spin_lock_bh(&ifp
->lock
);
730 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
731 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
732 spin_unlock_bh(&ifp
->lock
);
733 write_unlock(&idev
->lock
);
735 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
741 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
742 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
743 spin_unlock_bh(&ifp
->lock
);
744 write_unlock(&idev
->lock
);
746 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
752 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
753 tmp_valid_lft
= min_t(__u32
,
755 idev
->cnf
.temp_valid_lft
);
756 tmp_prefered_lft
= min_t(__u32
,
758 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
759 tmp_plen
= ifp
->prefix_len
;
760 max_addresses
= idev
->cnf
.max_addresses
;
761 tmp_cstamp
= ifp
->cstamp
;
762 tmp_tstamp
= ifp
->tstamp
;
763 spin_unlock_bh(&ifp
->lock
);
765 write_unlock(&idev
->lock
);
766 ift
= !max_addresses
||
767 ipv6_count_addresses(idev
) < max_addresses
?
768 ipv6_add_addr(idev
, &addr
, tmp_plen
,
769 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
, IFA_F_TEMPORARY
) : NULL
;
770 if (!ift
|| IS_ERR(ift
)) {
774 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
776 write_lock(&idev
->lock
);
780 spin_lock_bh(&ift
->lock
);
782 ift
->valid_lft
= tmp_valid_lft
;
783 ift
->prefered_lft
= tmp_prefered_lft
;
784 ift
->cstamp
= tmp_cstamp
;
785 ift
->tstamp
= tmp_tstamp
;
786 spin_unlock_bh(&ift
->lock
);
788 addrconf_dad_start(ift
, 0);
797 * Choose an appropriate source address (RFC3484)
799 struct ipv6_saddr_score
{
807 #define IPV6_SADDR_SCORE_LOCAL 0x0001
808 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
809 #define IPV6_SADDR_SCORE_HOA 0x0008
810 #define IPV6_SADDR_SCORE_OIF 0x0010
811 #define IPV6_SADDR_SCORE_LABEL 0x0020
812 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
814 static inline int ipv6_saddr_preferred(int type
)
816 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
817 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
822 /* static matching label */
823 static inline int ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
826 * prefix (longest match) label
827 * -----------------------------
836 if (type
& IPV6_ADDR_LOOPBACK
)
838 else if (type
& IPV6_ADDR_COMPATv4
)
840 else if (type
& IPV6_ADDR_MAPPED
)
842 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
844 else if (addr
->s6_addr16
[0] == htons(0x2002))
846 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
851 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
852 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
854 struct ipv6_saddr_score hiscore
;
855 struct inet6_ifaddr
*ifa_result
= NULL
;
856 int daddr_type
= __ipv6_addr_type(daddr
);
857 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
858 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
859 struct net_device
*dev
;
861 memset(&hiscore
, 0, sizeof(hiscore
));
863 read_lock(&dev_base_lock
);
866 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
867 struct inet6_dev
*idev
;
868 struct inet6_ifaddr
*ifa
;
870 /* Rule 0: Candidate Source Address (section 4)
871 * - multicast and link-local destination address,
872 * the set of candidate source address MUST only
873 * include addresses assigned to interfaces
874 * belonging to the same link as the outgoing
876 * (- For site-local destination addresses, the
877 * set of candidate source addresses MUST only
878 * include addresses assigned to interfaces
879 * belonging to the same site as the outgoing
882 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
883 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
884 daddr_dev
&& dev
!= daddr_dev
)
887 idev
= __in6_dev_get(dev
);
891 read_lock_bh(&idev
->lock
);
892 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
893 struct ipv6_saddr_score score
;
895 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
898 * - Tentative Address (RFC2462 section 5.4)
899 * - A tentative address is not considered
900 * "assigned to an interface" in the traditional
902 * - Candidate Source Address (section 4)
903 * - In any case, anycast addresses, multicast
904 * addresses, and the unspecified address MUST
905 * NOT be included in a candidate set.
907 if (ifa
->flags
& IFA_F_TENTATIVE
)
909 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
910 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
911 LIMIT_NETDEBUG(KERN_DEBUG
912 "ADDRCONF: unspecified / multicast address"
913 "assigned as unicast address on %s",
923 if (ifa_result
== NULL
) {
924 /* record it if the first available entry */
928 /* Rule 1: Prefer same address */
929 if (hiscore
.rule
< 1) {
930 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
931 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
934 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
935 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
936 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
941 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
945 /* Rule 2: Prefer appropriate scope */
946 if (hiscore
.rule
< 2) {
947 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
950 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
951 if (hiscore
.scope
< score
.scope
) {
952 if (hiscore
.scope
< daddr_scope
) {
957 } else if (score
.scope
< hiscore
.scope
) {
958 if (score
.scope
< daddr_scope
)
959 break; /* addresses sorted by scope */
966 /* Rule 3: Avoid deprecated address */
967 if (hiscore
.rule
< 3) {
968 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
969 !(ifa_result
->flags
& IFA_F_DEPRECATED
))
970 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
973 if (ipv6_saddr_preferred(score
.addr_type
) ||
974 !(ifa
->flags
& IFA_F_DEPRECATED
)) {
975 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
976 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
981 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
985 /* Rule 4: Prefer home address */
986 #ifdef CONFIG_IPV6_MIP6
987 if (hiscore
.rule
< 4) {
988 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
989 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
992 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
993 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
994 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
999 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1003 if (hiscore
.rule
< 4)
1007 /* Rule 5: Prefer outgoing interface */
1008 if (hiscore
.rule
< 5) {
1009 if (daddr_dev
== NULL
||
1010 daddr_dev
== ifa_result
->idev
->dev
)
1011 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1014 if (daddr_dev
== NULL
||
1015 daddr_dev
== ifa
->idev
->dev
) {
1016 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1017 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1022 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1026 /* Rule 6: Prefer matching label */
1027 if (hiscore
.rule
< 6) {
1028 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1029 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1032 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1033 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1034 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1039 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1043 #ifdef CONFIG_IPV6_PRIVACY
1044 /* Rule 7: Prefer public address
1045 * Note: prefer temprary address if use_tempaddr >= 2
1047 if (hiscore
.rule
< 7) {
1048 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1049 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1050 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1053 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1054 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1055 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1056 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1061 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1065 if (hiscore
.rule
< 7)
1068 /* Rule 8: Use longest matching prefix */
1069 if (hiscore
.rule
< 8) {
1070 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1073 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1074 if (score
.matchlen
> hiscore
.matchlen
) {
1079 else if (score
.matchlen
< hiscore
.matchlen
)
1083 /* Final Rule: choose first available one */
1087 in6_ifa_put(ifa_result
);
1092 read_unlock_bh(&idev
->lock
);
1095 read_unlock(&dev_base_lock
);
1098 return -EADDRNOTAVAIL
;
1100 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1101 in6_ifa_put(ifa_result
);
1106 int ipv6_get_saddr(struct dst_entry
*dst
,
1107 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1109 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1112 EXPORT_SYMBOL(ipv6_get_saddr
);
1114 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
)
1116 struct inet6_dev
*idev
;
1117 int err
= -EADDRNOTAVAIL
;
1120 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1121 struct inet6_ifaddr
*ifp
;
1123 read_lock_bh(&idev
->lock
);
1124 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1125 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1126 ipv6_addr_copy(addr
, &ifp
->addr
);
1131 read_unlock_bh(&idev
->lock
);
1137 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1140 struct inet6_ifaddr
*ifp
;
1142 read_lock_bh(&idev
->lock
);
1143 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1145 read_unlock_bh(&idev
->lock
);
1149 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1151 struct inet6_ifaddr
* ifp
;
1152 u8 hash
= ipv6_addr_hash(addr
);
1154 read_lock_bh(&addrconf_hash_lock
);
1155 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1156 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1157 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1158 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1159 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1163 read_unlock_bh(&addrconf_hash_lock
);
1167 EXPORT_SYMBOL(ipv6_chk_addr
);
1170 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1172 struct inet6_ifaddr
* ifp
;
1173 u8 hash
= ipv6_addr_hash(addr
);
1175 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1176 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1177 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1184 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1186 struct inet6_ifaddr
* ifp
;
1187 u8 hash
= ipv6_addr_hash(addr
);
1189 read_lock_bh(&addrconf_hash_lock
);
1190 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1191 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1192 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1193 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1199 read_unlock_bh(&addrconf_hash_lock
);
1204 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1206 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1207 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1208 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1209 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1210 int sk_ipv6only
= ipv6_only_sock(sk
);
1211 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1212 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1213 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1215 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1218 if (addr_type2
== IPV6_ADDR_ANY
&&
1219 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1222 if (addr_type
== IPV6_ADDR_ANY
&&
1223 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1226 if (sk2_rcv_saddr6
&&
1227 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1230 if (addr_type
== IPV6_ADDR_MAPPED
&&
1232 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1238 /* Gets referenced address, destroys ifaddr */
1240 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1242 if (ifp
->flags
&IFA_F_PERMANENT
) {
1243 spin_lock_bh(&ifp
->lock
);
1244 addrconf_del_timer(ifp
);
1245 ifp
->flags
|= IFA_F_TENTATIVE
;
1246 spin_unlock_bh(&ifp
->lock
);
1248 #ifdef CONFIG_IPV6_PRIVACY
1249 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1250 struct inet6_ifaddr
*ifpub
;
1251 spin_lock_bh(&ifp
->lock
);
1254 in6_ifa_hold(ifpub
);
1255 spin_unlock_bh(&ifp
->lock
);
1256 ipv6_create_tempaddr(ifpub
, ifp
);
1259 spin_unlock_bh(&ifp
->lock
);
1267 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1269 if (net_ratelimit())
1270 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1271 addrconf_dad_stop(ifp
);
1274 /* Join to solicited addr multicast group. */
1276 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1278 struct in6_addr maddr
;
1280 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1283 addrconf_addr_solict_mult(addr
, &maddr
);
1284 ipv6_dev_mc_inc(dev
, &maddr
);
1287 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1289 struct in6_addr maddr
;
1291 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1294 addrconf_addr_solict_mult(addr
, &maddr
);
1295 __ipv6_dev_mc_dec(idev
, &maddr
);
1298 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1300 struct in6_addr addr
;
1301 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1302 if (ipv6_addr_any(&addr
))
1304 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1307 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1309 struct in6_addr addr
;
1310 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1311 if (ipv6_addr_any(&addr
))
1313 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1316 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1318 if (dev
->addr_len
!= ETH_ALEN
)
1320 memcpy(eui
, dev
->dev_addr
, 3);
1321 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1324 * The zSeries OSA network cards can be shared among various
1325 * OS instances, but the OSA cards have only one MAC address.
1326 * This leads to duplicate address conflicts in conjunction
1327 * with IPv6 if more than one instance uses the same card.
1329 * The driver for these cards can deliver a unique 16-bit
1330 * identifier for each instance sharing the same card. It is
1331 * placed instead of 0xFFFE in the interface identifier. The
1332 * "u" bit of the interface identifier is not inverted in this
1333 * case. Hence the resulting interface identifier has local
1334 * scope according to RFC2373.
1337 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1338 eui
[4] = dev
->dev_id
& 0xFF;
1347 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1349 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1350 if (dev
->addr_len
!= ARCNET_ALEN
)
1353 eui
[7] = *(u8
*)dev
->dev_addr
;
1357 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1359 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1361 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1366 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1368 switch (dev
->type
) {
1371 case ARPHRD_IEEE802_TR
:
1372 return addrconf_ifid_eui48(eui
, dev
);
1374 return addrconf_ifid_arcnet(eui
, dev
);
1375 case ARPHRD_INFINIBAND
:
1376 return addrconf_ifid_infiniband(eui
, dev
);
1381 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1384 struct inet6_ifaddr
*ifp
;
1386 read_lock_bh(&idev
->lock
);
1387 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1388 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1389 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1394 read_unlock_bh(&idev
->lock
);
1398 #ifdef CONFIG_IPV6_PRIVACY
1399 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1400 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1403 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1404 idev
->rndid
[0] &= ~0x02;
1407 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1408 * check if generated address is not inappropriate
1410 * - Reserved subnet anycast (RFC 2526)
1411 * 11111101 11....11 1xxxxxxx
1412 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1413 * 00-00-5E-FE-xx-xx-xx-xx
1415 * - XXX: already assigned to an address on the device
1417 if (idev
->rndid
[0] == 0xfd &&
1418 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1419 (idev
->rndid
[7]&0x80))
1421 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1422 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1424 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1431 static void ipv6_regen_rndid(unsigned long data
)
1433 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1434 unsigned long expires
;
1437 write_lock_bh(&idev
->lock
);
1442 if (__ipv6_regen_rndid(idev
) < 0)
1446 idev
->cnf
.temp_prefered_lft
* HZ
-
1447 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1448 if (time_before(expires
, jiffies
)) {
1450 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1455 if (!mod_timer(&idev
->regen_timer
, expires
))
1459 write_unlock_bh(&idev
->lock
);
1460 rcu_read_unlock_bh();
1464 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1467 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1468 ret
= __ipv6_regen_rndid(idev
);
1478 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1479 unsigned long expires
, u32 flags
)
1481 struct fib6_config cfg
= {
1482 .fc_table
= RT6_TABLE_PREFIX
,
1483 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1484 .fc_ifindex
= dev
->ifindex
,
1485 .fc_expires
= expires
,
1487 .fc_flags
= RTF_UP
| flags
,
1490 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1492 /* Prevent useless cloning on PtP SIT.
1493 This thing is done here expecting that the whole
1494 class of non-broadcast devices need not cloning.
1496 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1497 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1498 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1501 ip6_route_add(&cfg
);
1504 /* Create "default" multicast route to the interface */
1506 static void addrconf_add_mroute(struct net_device
*dev
)
1508 struct fib6_config cfg
= {
1509 .fc_table
= RT6_TABLE_LOCAL
,
1510 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1511 .fc_ifindex
= dev
->ifindex
,
1516 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1518 ip6_route_add(&cfg
);
1521 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1522 static void sit_route_add(struct net_device
*dev
)
1524 struct fib6_config cfg
= {
1525 .fc_table
= RT6_TABLE_MAIN
,
1526 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1527 .fc_ifindex
= dev
->ifindex
,
1529 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1532 /* prefix length - 96 bits "::d.d.d.d" */
1533 ip6_route_add(&cfg
);
1537 static void addrconf_add_lroute(struct net_device
*dev
)
1539 struct in6_addr addr
;
1541 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1542 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1545 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1547 struct inet6_dev
*idev
;
1551 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1554 /* Add default multicast route */
1555 addrconf_add_mroute(dev
);
1557 /* Add link local route */
1558 addrconf_add_lroute(dev
);
1562 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1564 struct prefix_info
*pinfo
;
1568 unsigned long rt_expires
;
1569 struct inet6_dev
*in6_dev
;
1571 pinfo
= (struct prefix_info
*) opt
;
1573 if (len
< sizeof(struct prefix_info
)) {
1574 ADBG(("addrconf: prefix option too short\n"));
1579 * Validation checks ([ADDRCONF], page 19)
1582 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1584 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1587 valid_lft
= ntohl(pinfo
->valid
);
1588 prefered_lft
= ntohl(pinfo
->prefered
);
1590 if (prefered_lft
> valid_lft
) {
1591 if (net_ratelimit())
1592 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1596 in6_dev
= in6_dev_get(dev
);
1598 if (in6_dev
== NULL
) {
1599 if (net_ratelimit())
1600 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1605 * Two things going on here:
1606 * 1) Add routes for on-link prefixes
1607 * 2) Configure prefixes with the auto flag set
1610 /* Avoid arithmetic overflow. Really, we could
1611 save rt_expires in seconds, likely valid_lft,
1612 but it would require division in fib gc, that it
1615 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1616 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1618 rt_expires
= valid_lft
* HZ
;
1621 * We convert this (in jiffies) to clock_t later.
1622 * Avoid arithmetic overflow there as well.
1623 * Overflow can happen only if HZ < USER_HZ.
1625 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1626 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1628 if (pinfo
->onlink
) {
1629 struct rt6_info
*rt
;
1630 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1632 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1633 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1634 if (valid_lft
== 0) {
1638 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1641 } else if (valid_lft
) {
1642 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1643 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1646 dst_release(&rt
->u
.dst
);
1649 /* Try to figure out our local address for this prefix */
1651 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1652 struct inet6_ifaddr
* ifp
;
1653 struct in6_addr addr
;
1654 int create
= 0, update_lft
= 0;
1656 if (pinfo
->prefix_len
== 64) {
1657 memcpy(&addr
, &pinfo
->prefix
, 8);
1658 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1659 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1660 in6_dev_put(in6_dev
);
1665 if (net_ratelimit())
1666 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1668 in6_dev_put(in6_dev
);
1673 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1675 if (ifp
== NULL
&& valid_lft
) {
1676 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1678 /* Do not allow to create too much of autoconfigured
1679 * addresses; this would be too easy way to crash kernel.
1681 if (!max_addresses
||
1682 ipv6_count_addresses(in6_dev
) < max_addresses
)
1683 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1684 addr_type
&IPV6_ADDR_SCOPE_MASK
, 0);
1686 if (!ifp
|| IS_ERR(ifp
)) {
1687 in6_dev_put(in6_dev
);
1691 update_lft
= create
= 1;
1692 ifp
->cstamp
= jiffies
;
1693 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1699 #ifdef CONFIG_IPV6_PRIVACY
1700 struct inet6_ifaddr
*ift
;
1704 /* update lifetime (RFC2462 5.5.3 e) */
1705 spin_lock(&ifp
->lock
);
1707 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1708 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1711 if (!update_lft
&& stored_lft
) {
1712 if (valid_lft
> MIN_VALID_LIFETIME
||
1713 valid_lft
> stored_lft
)
1715 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1716 /* valid_lft <= stored_lft is always true */
1720 valid_lft
= MIN_VALID_LIFETIME
;
1721 if (valid_lft
< prefered_lft
)
1722 prefered_lft
= valid_lft
;
1728 ifp
->valid_lft
= valid_lft
;
1729 ifp
->prefered_lft
= prefered_lft
;
1732 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1733 spin_unlock(&ifp
->lock
);
1735 if (!(flags
&IFA_F_TENTATIVE
))
1736 ipv6_ifa_notify(0, ifp
);
1738 spin_unlock(&ifp
->lock
);
1740 #ifdef CONFIG_IPV6_PRIVACY
1741 read_lock_bh(&in6_dev
->lock
);
1742 /* update all temporary addresses in the list */
1743 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1745 * When adjusting the lifetimes of an existing
1746 * temporary address, only lower the lifetimes.
1747 * Implementations must not increase the
1748 * lifetimes of an existing temporary address
1749 * when processing a Prefix Information Option.
1751 spin_lock(&ift
->lock
);
1753 if (ift
->valid_lft
> valid_lft
&&
1754 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1755 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1756 if (ift
->prefered_lft
> prefered_lft
&&
1757 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1758 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1759 spin_unlock(&ift
->lock
);
1760 if (!(flags
&IFA_F_TENTATIVE
))
1761 ipv6_ifa_notify(0, ift
);
1764 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1766 * When a new public address is created as described in [ADDRCONF],
1767 * also create a new temporary address.
1769 read_unlock_bh(&in6_dev
->lock
);
1770 ipv6_create_tempaddr(ifp
, NULL
);
1772 read_unlock_bh(&in6_dev
->lock
);
1779 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1780 in6_dev_put(in6_dev
);
1784 * Set destination address.
1785 * Special case for SIT interfaces where we create a new "virtual"
1788 int addrconf_set_dstaddr(void __user
*arg
)
1790 struct in6_ifreq ireq
;
1791 struct net_device
*dev
;
1797 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1800 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1806 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1807 if (dev
->type
== ARPHRD_SIT
) {
1810 struct ip_tunnel_parm p
;
1812 err
= -EADDRNOTAVAIL
;
1813 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1816 memset(&p
, 0, sizeof(p
));
1817 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1821 p
.iph
.protocol
= IPPROTO_IPV6
;
1823 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1825 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1826 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1831 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1833 err
= dev_open(dev
);
1844 * Manual configuration of address on an interface
1846 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1847 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1849 struct inet6_ifaddr
*ifp
;
1850 struct inet6_dev
*idev
;
1851 struct net_device
*dev
;
1853 u32 flags
= RTF_EXPIRES
;
1857 /* check the lifetime */
1858 if (!valid_lft
|| prefered_lft
> valid_lft
)
1861 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1864 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1867 scope
= ipv6_addr_scope(pfx
);
1869 if (valid_lft
== INFINITY_LIFE_TIME
) {
1870 ifa_flags
|= IFA_F_PERMANENT
;
1872 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1873 valid_lft
= 0x7FFFFFFF/HZ
;
1875 if (prefered_lft
== 0)
1876 ifa_flags
|= IFA_F_DEPRECATED
;
1877 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1878 (prefered_lft
!= INFINITY_LIFE_TIME
))
1879 prefered_lft
= 0x7FFFFFFF/HZ
;
1881 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1884 spin_lock_bh(&ifp
->lock
);
1885 ifp
->valid_lft
= valid_lft
;
1886 ifp
->prefered_lft
= prefered_lft
;
1887 ifp
->tstamp
= jiffies
;
1888 spin_unlock_bh(&ifp
->lock
);
1890 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1891 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1892 addrconf_dad_start(ifp
, 0);
1898 return PTR_ERR(ifp
);
1901 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1903 struct inet6_ifaddr
*ifp
;
1904 struct inet6_dev
*idev
;
1905 struct net_device
*dev
;
1907 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1910 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1913 read_lock_bh(&idev
->lock
);
1914 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1915 if (ifp
->prefix_len
== plen
&&
1916 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1918 read_unlock_bh(&idev
->lock
);
1922 /* If the last address is deleted administratively,
1923 disable IPv6 on this interface.
1925 if (idev
->addr_list
== NULL
)
1926 addrconf_ifdown(idev
->dev
, 1);
1930 read_unlock_bh(&idev
->lock
);
1931 return -EADDRNOTAVAIL
;
1935 int addrconf_add_ifaddr(void __user
*arg
)
1937 struct in6_ifreq ireq
;
1940 if (!capable(CAP_NET_ADMIN
))
1943 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1947 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
1948 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
1953 int addrconf_del_ifaddr(void __user
*arg
)
1955 struct in6_ifreq ireq
;
1958 if (!capable(CAP_NET_ADMIN
))
1961 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1965 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
1970 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1971 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
1973 struct inet6_ifaddr
* ifp
;
1974 struct in6_addr addr
;
1975 struct net_device
*dev
;
1980 memset(&addr
, 0, sizeof(struct in6_addr
));
1981 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
1983 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
1984 addr
.s6_addr32
[0] = htonl(0xfe800000);
1987 scope
= IPV6_ADDR_COMPATv4
;
1990 if (addr
.s6_addr32
[3]) {
1991 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
1993 spin_lock_bh(&ifp
->lock
);
1994 ifp
->flags
&= ~IFA_F_TENTATIVE
;
1995 spin_unlock_bh(&ifp
->lock
);
1996 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2002 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
2003 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2004 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2005 struct in_ifaddr
* ifa
;
2009 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2012 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2014 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2016 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2017 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2021 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2026 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2029 spin_lock_bh(&ifp
->lock
);
2030 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2031 spin_unlock_bh(&ifp
->lock
);
2032 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2041 static void init_loopback(struct net_device
*dev
)
2043 struct inet6_dev
*idev
;
2044 struct inet6_ifaddr
* ifp
;
2050 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2051 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2055 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2057 spin_lock_bh(&ifp
->lock
);
2058 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2059 spin_unlock_bh(&ifp
->lock
);
2060 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2065 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2067 struct inet6_ifaddr
* ifp
;
2069 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, IFA_F_PERMANENT
);
2071 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2072 addrconf_dad_start(ifp
, 0);
2077 static void addrconf_dev_config(struct net_device
*dev
)
2079 struct in6_addr addr
;
2080 struct inet6_dev
* idev
;
2084 if ((dev
->type
!= ARPHRD_ETHER
) &&
2085 (dev
->type
!= ARPHRD_FDDI
) &&
2086 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2087 (dev
->type
!= ARPHRD_ARCNET
) &&
2088 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2089 /* Alas, we support only Ethernet autoconfiguration. */
2093 idev
= addrconf_add_dev(dev
);
2097 memset(&addr
, 0, sizeof(struct in6_addr
));
2098 addr
.s6_addr32
[0] = htonl(0xFE800000);
2100 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2101 addrconf_add_linklocal(idev
, &addr
);
2104 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2105 static void addrconf_sit_config(struct net_device
*dev
)
2107 struct inet6_dev
*idev
;
2112 * Configure the tunnel with one of our IPv4
2113 * addresses... we should configure all of
2114 * our v4 addrs in the tunnel
2117 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2118 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2122 sit_add_v4_addrs(idev
);
2124 if (dev
->flags
&IFF_POINTOPOINT
) {
2125 addrconf_add_mroute(dev
);
2126 addrconf_add_lroute(dev
);
2133 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2135 struct in6_addr lladdr
;
2137 if (!ipv6_get_lladdr(link_dev
, &lladdr
)) {
2138 addrconf_add_linklocal(idev
, &lladdr
);
2144 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2146 struct net_device
*link_dev
;
2148 /* first try to inherit the link-local address from the link device */
2149 if (idev
->dev
->iflink
&&
2150 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2151 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2154 /* then try to inherit it from any device */
2155 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2156 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2159 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2163 * Autoconfigure tunnel with a link-local address so routing protocols,
2164 * DHCPv6, MLD etc. can be run over the virtual link
2167 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2169 struct inet6_dev
*idev
;
2173 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2174 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2177 ip6_tnl_add_linklocal(idev
);
2180 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2183 struct net_device
*dev
= (struct net_device
*) data
;
2184 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2185 int run_pending
= 0;
2188 case NETDEV_REGISTER
:
2190 idev
= ipv6_add_dev(dev
);
2192 printk(KERN_WARNING
"IPv6: add_dev failed for %s\n",
2198 if (event
== NETDEV_UP
) {
2199 if (!netif_carrier_ok(dev
)) {
2200 /* device is not ready yet. */
2202 "ADDRCONF(NETDEV_UP): %s: "
2203 "link is not ready\n",
2209 idev
->if_flags
|= IF_READY
;
2211 if (!netif_carrier_ok(dev
)) {
2212 /* device is still not ready. */
2217 if (idev
->if_flags
& IF_READY
) {
2218 /* device is already configured. */
2221 idev
->if_flags
|= IF_READY
;
2225 "ADDRCONF(NETDEV_CHANGE): %s: "
2226 "link becomes ready\n",
2233 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2235 addrconf_sit_config(dev
);
2238 case ARPHRD_TUNNEL6
:
2239 addrconf_ip6_tnl_config(dev
);
2241 case ARPHRD_LOOPBACK
:
2246 addrconf_dev_config(dev
);
2251 addrconf_dad_run(idev
);
2253 /* If the MTU changed during the interface down, when the
2254 interface up, the changed MTU must be reflected in the
2255 idev as well as routers.
2257 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2258 rt6_mtu_change(dev
, dev
->mtu
);
2259 idev
->cnf
.mtu6
= dev
->mtu
;
2261 idev
->tstamp
= jiffies
;
2262 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2263 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2264 stop IPv6 on this interface.
2266 if (dev
->mtu
< IPV6_MIN_MTU
)
2267 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2271 case NETDEV_CHANGEMTU
:
2272 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2273 rt6_mtu_change(dev
, dev
->mtu
);
2274 idev
->cnf
.mtu6
= dev
->mtu
;
2278 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2281 case NETDEV_UNREGISTER
:
2283 * Remove all addresses from this interface.
2285 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2288 case NETDEV_CHANGENAME
:
2289 #ifdef CONFIG_SYSCTL
2291 addrconf_sysctl_unregister(&idev
->cnf
);
2292 neigh_sysctl_unregister(idev
->nd_parms
);
2293 neigh_sysctl_register(dev
, idev
->nd_parms
,
2294 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2295 &ndisc_ifinfo_sysctl_change
,
2297 addrconf_sysctl_register(idev
, &idev
->cnf
);
2307 * addrconf module should be notified of a device going up
2309 static struct notifier_block ipv6_dev_notf
= {
2310 .notifier_call
= addrconf_notify
,
2314 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2316 struct inet6_dev
*idev
;
2317 struct inet6_ifaddr
*ifa
, **bifa
;
2322 if (dev
== &loopback_dev
&& how
== 1)
2326 neigh_ifdown(&nd_tbl
, dev
);
2328 idev
= __in6_dev_get(dev
);
2332 /* Step 1: remove reference to ipv6 device from parent device.
2338 /* protected by rtnl_lock */
2339 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2341 /* Step 1.5: remove snmp6 entry */
2342 snmp6_unregister_dev(idev
);
2346 /* Step 2: clear hash table */
2347 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2348 bifa
= &inet6_addr_lst
[i
];
2350 write_lock_bh(&addrconf_hash_lock
);
2351 while ((ifa
= *bifa
) != NULL
) {
2352 if (ifa
->idev
== idev
) {
2353 *bifa
= ifa
->lst_next
;
2354 ifa
->lst_next
= NULL
;
2355 addrconf_del_timer(ifa
);
2359 bifa
= &ifa
->lst_next
;
2361 write_unlock_bh(&addrconf_hash_lock
);
2364 write_lock_bh(&idev
->lock
);
2366 /* Step 3: clear flags for stateless addrconf */
2368 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2370 /* Step 4: clear address list */
2371 #ifdef CONFIG_IPV6_PRIVACY
2372 if (how
== 1 && del_timer(&idev
->regen_timer
))
2375 /* clear tempaddr list */
2376 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2377 idev
->tempaddr_list
= ifa
->tmp_next
;
2378 ifa
->tmp_next
= NULL
;
2380 write_unlock_bh(&idev
->lock
);
2381 spin_lock_bh(&ifa
->lock
);
2384 in6_ifa_put(ifa
->ifpub
);
2387 spin_unlock_bh(&ifa
->lock
);
2389 write_lock_bh(&idev
->lock
);
2392 while ((ifa
= idev
->addr_list
) != NULL
) {
2393 idev
->addr_list
= ifa
->if_next
;
2394 ifa
->if_next
= NULL
;
2396 addrconf_del_timer(ifa
);
2397 write_unlock_bh(&idev
->lock
);
2399 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2402 write_lock_bh(&idev
->lock
);
2404 write_unlock_bh(&idev
->lock
);
2406 /* Step 5: Discard multicast list */
2409 ipv6_mc_destroy_dev(idev
);
2413 /* Step 5: netlink notification of this interface */
2414 idev
->tstamp
= jiffies
;
2415 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2417 /* Shot the device (if unregistered) */
2420 #ifdef CONFIG_SYSCTL
2421 addrconf_sysctl_unregister(&idev
->cnf
);
2422 neigh_sysctl_unregister(idev
->nd_parms
);
2424 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2425 neigh_ifdown(&nd_tbl
, dev
);
2431 static void addrconf_rs_timer(unsigned long data
)
2433 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2435 if (ifp
->idev
->cnf
.forwarding
)
2438 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2440 * Announcement received after solicitation
2446 spin_lock(&ifp
->lock
);
2447 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2448 struct in6_addr all_routers
;
2450 /* The wait after the last probe can be shorter */
2451 addrconf_mod_timer(ifp
, AC_RS
,
2452 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2453 ifp
->idev
->cnf
.rtr_solicit_delay
:
2454 ifp
->idev
->cnf
.rtr_solicit_interval
);
2455 spin_unlock(&ifp
->lock
);
2457 ipv6_addr_all_routers(&all_routers
);
2459 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2461 spin_unlock(&ifp
->lock
);
2463 * Note: we do not support deprecated "all on-link"
2464 * assumption any longer.
2466 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2467 ifp
->idev
->dev
->name
);
2475 * Duplicate Address Detection
2477 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2479 unsigned long rand_num
;
2480 struct inet6_dev
*idev
= ifp
->idev
;
2482 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2483 ifp
->probes
= idev
->cnf
.dad_transmits
;
2484 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2487 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2489 struct inet6_dev
*idev
= ifp
->idev
;
2490 struct net_device
*dev
= idev
->dev
;
2492 addrconf_join_solict(dev
, &ifp
->addr
);
2494 net_srandom(ifp
->addr
.s6_addr32
[3]);
2496 read_lock_bh(&idev
->lock
);
2499 spin_lock_bh(&ifp
->lock
);
2501 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2502 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2503 ifp
->flags
& IFA_F_NODAD
) {
2504 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2505 spin_unlock_bh(&ifp
->lock
);
2506 read_unlock_bh(&idev
->lock
);
2508 addrconf_dad_completed(ifp
);
2512 if (!(idev
->if_flags
& IF_READY
)) {
2513 spin_unlock_bh(&ifp
->lock
);
2514 read_unlock_bh(&idev
->lock
);
2516 * If the defice is not ready:
2517 * - keep it tentative if it is a permanent address.
2518 * - otherwise, kill it.
2521 addrconf_dad_stop(ifp
);
2524 addrconf_dad_kick(ifp
);
2525 spin_unlock_bh(&ifp
->lock
);
2527 read_unlock_bh(&idev
->lock
);
2530 static void addrconf_dad_timer(unsigned long data
)
2532 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2533 struct inet6_dev
*idev
= ifp
->idev
;
2534 struct in6_addr unspec
;
2535 struct in6_addr mcaddr
;
2537 read_lock_bh(&idev
->lock
);
2539 read_unlock_bh(&idev
->lock
);
2542 spin_lock_bh(&ifp
->lock
);
2543 if (ifp
->probes
== 0) {
2545 * DAD was successful
2548 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2549 spin_unlock_bh(&ifp
->lock
);
2550 read_unlock_bh(&idev
->lock
);
2552 addrconf_dad_completed(ifp
);
2558 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2559 spin_unlock_bh(&ifp
->lock
);
2560 read_unlock_bh(&idev
->lock
);
2562 /* send a neighbour solicitation for our addr */
2563 memset(&unspec
, 0, sizeof(unspec
));
2564 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2565 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2570 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2572 struct net_device
* dev
= ifp
->idev
->dev
;
2575 * Configure the address for reception. Now it is valid.
2578 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2580 /* If added prefix is link local and forwarding is off,
2581 start sending router solicitations.
2584 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2585 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2586 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2587 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2588 struct in6_addr all_routers
;
2590 ipv6_addr_all_routers(&all_routers
);
2593 * If a host as already performed a random delay
2594 * [...] as part of DAD [...] there is no need
2595 * to delay again before sending the first RS
2597 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2599 spin_lock_bh(&ifp
->lock
);
2601 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2602 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2603 spin_unlock_bh(&ifp
->lock
);
2607 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2608 struct inet6_ifaddr
*ifp
;
2610 read_lock_bh(&idev
->lock
);
2611 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2612 spin_lock_bh(&ifp
->lock
);
2613 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2614 spin_unlock_bh(&ifp
->lock
);
2617 spin_unlock_bh(&ifp
->lock
);
2618 addrconf_dad_kick(ifp
);
2620 read_unlock_bh(&idev
->lock
);
2623 #ifdef CONFIG_PROC_FS
2624 struct if6_iter_state
{
2628 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2630 struct inet6_ifaddr
*ifa
= NULL
;
2631 struct if6_iter_state
*state
= seq
->private;
2633 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2634 ifa
= inet6_addr_lst
[state
->bucket
];
2641 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2643 struct if6_iter_state
*state
= seq
->private;
2645 ifa
= ifa
->lst_next
;
2647 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2648 ifa
= inet6_addr_lst
[state
->bucket
];
2654 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2656 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2659 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2661 return pos
? NULL
: ifa
;
2664 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2666 read_lock_bh(&addrconf_hash_lock
);
2667 return if6_get_idx(seq
, *pos
);
2670 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2672 struct inet6_ifaddr
*ifa
;
2674 ifa
= if6_get_next(seq
, v
);
2679 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2681 read_unlock_bh(&addrconf_hash_lock
);
2684 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2686 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2688 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2690 ifp
->idev
->dev
->ifindex
,
2694 ifp
->idev
->dev
->name
);
2698 static struct seq_operations if6_seq_ops
= {
2699 .start
= if6_seq_start
,
2700 .next
= if6_seq_next
,
2701 .show
= if6_seq_show
,
2702 .stop
= if6_seq_stop
,
2705 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2707 struct seq_file
*seq
;
2709 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2714 rc
= seq_open(file
, &if6_seq_ops
);
2718 seq
= file
->private_data
;
2727 static const struct file_operations if6_fops
= {
2728 .owner
= THIS_MODULE
,
2729 .open
= if6_seq_open
,
2731 .llseek
= seq_lseek
,
2732 .release
= seq_release_private
,
2735 int __init
if6_proc_init(void)
2737 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2742 void if6_proc_exit(void)
2744 proc_net_remove("if_inet6");
2746 #endif /* CONFIG_PROC_FS */
2748 #ifdef CONFIG_IPV6_MIP6
2749 /* Check if address is a home address configured on any interface. */
2750 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2753 struct inet6_ifaddr
* ifp
;
2754 u8 hash
= ipv6_addr_hash(addr
);
2755 read_lock_bh(&addrconf_hash_lock
);
2756 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2757 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2758 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2763 read_unlock_bh(&addrconf_hash_lock
);
2769 * Periodic address status verification
2772 static void addrconf_verify(unsigned long foo
)
2774 struct inet6_ifaddr
*ifp
;
2775 unsigned long now
, next
;
2778 spin_lock_bh(&addrconf_verify_lock
);
2780 next
= now
+ ADDR_CHECK_FREQUENCY
;
2782 del_timer(&addr_chk_timer
);
2784 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2787 read_lock(&addrconf_hash_lock
);
2788 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2790 #ifdef CONFIG_IPV6_PRIVACY
2791 unsigned long regen_advance
;
2794 if (ifp
->flags
& IFA_F_PERMANENT
)
2797 spin_lock(&ifp
->lock
);
2798 age
= (now
- ifp
->tstamp
) / HZ
;
2800 #ifdef CONFIG_IPV6_PRIVACY
2801 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2802 ifp
->idev
->cnf
.dad_transmits
*
2803 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2806 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2807 age
>= ifp
->valid_lft
) {
2808 spin_unlock(&ifp
->lock
);
2810 read_unlock(&addrconf_hash_lock
);
2813 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2814 spin_unlock(&ifp
->lock
);
2816 } else if (age
>= ifp
->prefered_lft
) {
2817 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2820 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2822 ifp
->flags
|= IFA_F_DEPRECATED
;
2825 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2826 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2828 spin_unlock(&ifp
->lock
);
2832 read_unlock(&addrconf_hash_lock
);
2834 ipv6_ifa_notify(0, ifp
);
2838 #ifdef CONFIG_IPV6_PRIVACY
2839 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2840 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2841 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2842 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2843 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2844 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2845 if (!ifp
->regen_count
&& ifpub
) {
2848 in6_ifa_hold(ifpub
);
2849 spin_unlock(&ifp
->lock
);
2850 read_unlock(&addrconf_hash_lock
);
2851 spin_lock(&ifpub
->lock
);
2852 ifpub
->regen_count
= 0;
2853 spin_unlock(&ifpub
->lock
);
2854 ipv6_create_tempaddr(ifpub
, ifp
);
2859 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2860 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2861 spin_unlock(&ifp
->lock
);
2864 /* ifp->prefered_lft <= ifp->valid_lft */
2865 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2866 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2867 spin_unlock(&ifp
->lock
);
2870 read_unlock(&addrconf_hash_lock
);
2873 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2874 add_timer(&addr_chk_timer
);
2875 spin_unlock_bh(&addrconf_verify_lock
);
2878 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2880 struct in6_addr
*pfx
= NULL
;
2883 pfx
= nla_data(addr
);
2886 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2889 pfx
= nla_data(local
);
2895 static struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] __read_mostly
= {
2896 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2897 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2898 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2902 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2904 struct ifaddrmsg
*ifm
;
2905 struct nlattr
*tb
[IFA_MAX
+1];
2906 struct in6_addr
*pfx
;
2909 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2913 ifm
= nlmsg_data(nlh
);
2914 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2918 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2921 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
2922 u32 prefered_lft
, u32 valid_lft
)
2924 u32 flags
= RTF_EXPIRES
;
2926 if (!valid_lft
|| (prefered_lft
> valid_lft
))
2929 if (valid_lft
== INFINITY_LIFE_TIME
) {
2930 ifa_flags
|= IFA_F_PERMANENT
;
2932 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
2933 valid_lft
= 0x7FFFFFFF/HZ
;
2935 if (prefered_lft
== 0)
2936 ifa_flags
|= IFA_F_DEPRECATED
;
2937 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
2938 (prefered_lft
!= INFINITY_LIFE_TIME
))
2939 prefered_lft
= 0x7FFFFFFF/HZ
;
2941 spin_lock_bh(&ifp
->lock
);
2942 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
2943 ifp
->tstamp
= jiffies
;
2944 ifp
->valid_lft
= valid_lft
;
2945 ifp
->prefered_lft
= prefered_lft
;
2947 spin_unlock_bh(&ifp
->lock
);
2948 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
2949 ipv6_ifa_notify(0, ifp
);
2951 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
2952 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
2959 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2961 struct ifaddrmsg
*ifm
;
2962 struct nlattr
*tb
[IFA_MAX
+1];
2963 struct in6_addr
*pfx
;
2964 struct inet6_ifaddr
*ifa
;
2965 struct net_device
*dev
;
2966 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
2970 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2974 ifm
= nlmsg_data(nlh
);
2975 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2979 if (tb
[IFA_CACHEINFO
]) {
2980 struct ifa_cacheinfo
*ci
;
2982 ci
= nla_data(tb
[IFA_CACHEINFO
]);
2983 valid_lft
= ci
->ifa_valid
;
2984 preferred_lft
= ci
->ifa_prefered
;
2986 preferred_lft
= INFINITY_LIFE_TIME
;
2987 valid_lft
= INFINITY_LIFE_TIME
;
2990 dev
= __dev_get_by_index(ifm
->ifa_index
);
2994 /* We ignore other flags so far. */
2995 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
2997 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3000 * It would be best to check for !NLM_F_CREATE here but
3001 * userspace alreay relies on not having to provide this.
3003 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3004 ifa_flags
, preferred_lft
, valid_lft
);
3007 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3008 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3011 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3018 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3019 u8 scope
, int ifindex
)
3021 struct ifaddrmsg
*ifm
;
3023 ifm
= nlmsg_data(nlh
);
3024 ifm
->ifa_family
= AF_INET6
;
3025 ifm
->ifa_prefixlen
= prefixlen
;
3026 ifm
->ifa_flags
= flags
;
3027 ifm
->ifa_scope
= scope
;
3028 ifm
->ifa_index
= ifindex
;
3031 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3032 unsigned long tstamp
, u32 preferred
, u32 valid
)
3034 struct ifa_cacheinfo ci
;
3036 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3037 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3038 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3039 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3040 ci
.ifa_prefered
= preferred
;
3041 ci
.ifa_valid
= valid
;
3043 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3046 static inline int rt_scope(int ifa_scope
)
3048 if (ifa_scope
& IFA_HOST
)
3049 return RT_SCOPE_HOST
;
3050 else if (ifa_scope
& IFA_LINK
)
3051 return RT_SCOPE_LINK
;
3052 else if (ifa_scope
& IFA_SITE
)
3053 return RT_SCOPE_SITE
;
3055 return RT_SCOPE_UNIVERSE
;
3058 static inline int inet6_ifaddr_msgsize(void)
3060 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3061 + nla_total_size(16) /* IFA_ADDRESS */
3062 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3065 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3066 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3068 struct nlmsghdr
*nlh
;
3069 u32 preferred
, valid
;
3071 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3075 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3076 ifa
->idev
->dev
->ifindex
);
3078 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3079 preferred
= ifa
->prefered_lft
;
3080 valid
= ifa
->valid_lft
;
3081 if (preferred
!= INFINITY_LIFE_TIME
) {
3082 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3084 if (valid
!= INFINITY_LIFE_TIME
)
3088 preferred
= INFINITY_LIFE_TIME
;
3089 valid
= INFINITY_LIFE_TIME
;
3092 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3093 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3094 nlmsg_cancel(skb
, nlh
);
3098 return nlmsg_end(skb
, nlh
);
3101 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3102 u32 pid
, u32 seq
, int event
, u16 flags
)
3104 struct nlmsghdr
*nlh
;
3105 u8 scope
= RT_SCOPE_UNIVERSE
;
3106 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3108 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3109 scope
= RT_SCOPE_SITE
;
3111 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3115 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3116 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3117 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3118 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3119 nlmsg_cancel(skb
, nlh
);
3123 return nlmsg_end(skb
, nlh
);
3126 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3127 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3129 struct nlmsghdr
*nlh
;
3130 u8 scope
= RT_SCOPE_UNIVERSE
;
3131 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3133 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3134 scope
= RT_SCOPE_SITE
;
3136 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3140 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3141 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3142 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3143 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3144 nlmsg_cancel(skb
, nlh
);
3148 return nlmsg_end(skb
, nlh
);
3158 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3159 enum addr_type_t type
)
3162 int s_idx
, s_ip_idx
;
3164 struct net_device
*dev
;
3165 struct inet6_dev
*idev
= NULL
;
3166 struct inet6_ifaddr
*ifa
;
3167 struct ifmcaddr6
*ifmca
;
3168 struct ifacaddr6
*ifaca
;
3170 s_idx
= cb
->args
[0];
3171 s_ip_idx
= ip_idx
= cb
->args
[1];
3172 read_lock(&dev_base_lock
);
3174 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
3180 if ((idev
= in6_dev_get(dev
)) == NULL
)
3182 read_lock_bh(&idev
->lock
);
3185 /* unicast address incl. temp addr */
3186 for (ifa
= idev
->addr_list
; ifa
;
3187 ifa
= ifa
->if_next
, ip_idx
++) {
3188 if (ip_idx
< s_ip_idx
)
3190 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3191 NETLINK_CB(cb
->skb
).pid
,
3192 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3197 case MULTICAST_ADDR
:
3198 /* multicast address */
3199 for (ifmca
= idev
->mc_list
; ifmca
;
3200 ifmca
= ifmca
->next
, ip_idx
++) {
3201 if (ip_idx
< s_ip_idx
)
3203 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3204 NETLINK_CB(cb
->skb
).pid
,
3205 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3211 /* anycast address */
3212 for (ifaca
= idev
->ac_list
; ifaca
;
3213 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3214 if (ip_idx
< s_ip_idx
)
3216 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3217 NETLINK_CB(cb
->skb
).pid
,
3218 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3226 read_unlock_bh(&idev
->lock
);
3231 read_unlock_bh(&idev
->lock
);
3234 read_unlock(&dev_base_lock
);
3236 cb
->args
[1] = ip_idx
;
3240 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3242 enum addr_type_t type
= UNICAST_ADDR
;
3243 return inet6_dump_addr(skb
, cb
, type
);
3246 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3248 enum addr_type_t type
= MULTICAST_ADDR
;
3249 return inet6_dump_addr(skb
, cb
, type
);
3253 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3255 enum addr_type_t type
= ANYCAST_ADDR
;
3256 return inet6_dump_addr(skb
, cb
, type
);
3259 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3262 struct ifaddrmsg
*ifm
;
3263 struct nlattr
*tb
[IFA_MAX
+1];
3264 struct in6_addr
*addr
= NULL
;
3265 struct net_device
*dev
= NULL
;
3266 struct inet6_ifaddr
*ifa
;
3267 struct sk_buff
*skb
;
3270 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3274 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3280 ifm
= nlmsg_data(nlh
);
3282 dev
= __dev_get_by_index(ifm
->ifa_index
);
3284 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3285 err
= -EADDRNOTAVAIL
;
3289 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3294 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3295 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3297 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3298 WARN_ON(err
== -EMSGSIZE
);
3302 err
= rtnl_unicast(skb
, NETLINK_CB(in_skb
).pid
);
3309 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3311 struct sk_buff
*skb
;
3314 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3318 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3320 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3321 WARN_ON(err
== -EMSGSIZE
);
3325 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3328 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3331 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3332 __s32
*array
, int bytes
)
3334 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3336 memset(array
, 0, bytes
);
3337 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3338 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3339 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3340 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3341 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3342 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3343 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3344 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3345 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3346 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3347 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3348 #ifdef CONFIG_IPV6_PRIVACY
3349 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3350 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3351 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3352 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3353 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3355 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3356 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3357 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3358 #ifdef CONFIG_IPV6_ROUTER_PREF
3359 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3360 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3361 #ifdef CONFIG_IPV6_ROUTE_INFO
3362 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3365 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3366 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3369 static inline size_t inet6_if_nlmsg_size(void)
3371 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3372 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3373 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3374 + nla_total_size(4) /* IFLA_MTU */
3375 + nla_total_size(4) /* IFLA_LINK */
3376 + nla_total_size( /* IFLA_PROTINFO */
3377 nla_total_size(4) /* IFLA_INET6_FLAGS */
3378 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3379 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3383 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3384 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3386 struct net_device
*dev
= idev
->dev
;
3387 struct nlattr
*conf
;
3388 struct ifinfomsg
*hdr
;
3389 struct nlmsghdr
*nlh
;
3391 struct ifla_cacheinfo ci
;
3393 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3397 hdr
= nlmsg_data(nlh
);
3398 hdr
->ifi_family
= AF_INET6
;
3400 hdr
->ifi_type
= dev
->type
;
3401 hdr
->ifi_index
= dev
->ifindex
;
3402 hdr
->ifi_flags
= dev_get_flags(dev
);
3403 hdr
->ifi_change
= 0;
3405 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3408 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3410 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3411 if (dev
->ifindex
!= dev
->iflink
)
3412 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3414 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3415 if (protoinfo
== NULL
)
3416 goto nla_put_failure
;
3418 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3420 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3421 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3422 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3423 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3424 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3425 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3427 conf
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3429 goto nla_put_failure
;
3430 ipv6_store_devconf(&idev
->cnf
, nla_data(conf
), nla_len(conf
));
3432 /* XXX - Statistics/MC not implemented */
3434 nla_nest_end(skb
, protoinfo
);
3435 return nlmsg_end(skb
, nlh
);
3438 nlmsg_cancel(skb
, nlh
);
3442 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3445 int s_idx
= cb
->args
[0];
3446 struct net_device
*dev
;
3447 struct inet6_dev
*idev
;
3449 read_lock(&dev_base_lock
);
3450 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3453 if ((idev
= in6_dev_get(dev
)) == NULL
)
3455 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3456 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3461 read_unlock(&dev_base_lock
);
3467 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3469 struct sk_buff
*skb
;
3472 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3476 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3478 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3479 WARN_ON(err
== -EMSGSIZE
);
3483 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3486 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3489 static inline size_t inet6_prefix_nlmsg_size(void)
3491 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3492 + nla_total_size(sizeof(struct in6_addr
))
3493 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3496 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3497 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3498 int event
, unsigned int flags
)
3500 struct prefixmsg
*pmsg
;
3501 struct nlmsghdr
*nlh
;
3502 struct prefix_cacheinfo ci
;
3504 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3508 pmsg
= nlmsg_data(nlh
);
3509 pmsg
->prefix_family
= AF_INET6
;
3510 pmsg
->prefix_pad1
= 0;
3511 pmsg
->prefix_pad2
= 0;
3512 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3513 pmsg
->prefix_len
= pinfo
->prefix_len
;
3514 pmsg
->prefix_type
= pinfo
->type
;
3515 pmsg
->prefix_pad3
= 0;
3516 pmsg
->prefix_flags
= 0;
3518 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3519 if (pinfo
->autoconf
)
3520 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3522 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3524 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3525 ci
.valid_time
= ntohl(pinfo
->valid
);
3526 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3528 return nlmsg_end(skb
, nlh
);
3531 nlmsg_cancel(skb
, nlh
);
3535 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3536 struct prefix_info
*pinfo
)
3538 struct sk_buff
*skb
;
3541 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3545 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3547 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3548 WARN_ON(err
== -EMSGSIZE
);
3552 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3555 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX
, err
);
3558 static struct rtnetlink_link inet6_rtnetlink_table
[RTM_NR_MSGTYPES
] = {
3559 [RTM_GETLINK
- RTM_BASE
] = { .dumpit
= inet6_dump_ifinfo
, },
3560 [RTM_NEWADDR
- RTM_BASE
] = { .doit
= inet6_rtm_newaddr
, },
3561 [RTM_DELADDR
- RTM_BASE
] = { .doit
= inet6_rtm_deladdr
, },
3562 [RTM_GETADDR
- RTM_BASE
] = { .doit
= inet6_rtm_getaddr
,
3563 .dumpit
= inet6_dump_ifaddr
, },
3564 [RTM_GETMULTICAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifmcaddr
, },
3565 [RTM_GETANYCAST
- RTM_BASE
] = { .dumpit
= inet6_dump_ifacaddr
, },
3566 [RTM_NEWROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_newroute
, },
3567 [RTM_DELROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_delroute
, },
3568 [RTM_GETROUTE
- RTM_BASE
] = { .doit
= inet6_rtm_getroute
,
3569 .dumpit
= inet6_dump_fib
, },
3570 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
3571 [RTM_GETRULE
- RTM_BASE
] = { .dumpit
= fib6_rules_dump
, },
3575 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3577 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3581 ip6_ins_rt(ifp
->rt
);
3582 if (ifp
->idev
->cnf
.forwarding
)
3583 addrconf_join_anycast(ifp
);
3586 if (ifp
->idev
->cnf
.forwarding
)
3587 addrconf_leave_anycast(ifp
);
3588 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3589 dst_hold(&ifp
->rt
->u
.dst
);
3590 if (ip6_del_rt(ifp
->rt
))
3591 dst_free(&ifp
->rt
->u
.dst
);
3596 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3599 if (likely(ifp
->idev
->dead
== 0))
3600 __ipv6_ifa_notify(event
, ifp
);
3601 rcu_read_unlock_bh();
3604 #ifdef CONFIG_SYSCTL
3607 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3608 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3610 int *valp
= ctl
->data
;
3614 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3616 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3617 if (valp
!= &ipv6_devconf
.forwarding
) {
3618 if ((!*valp
) ^ (!val
)) {
3619 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3622 dev_forward_change(idev
);
3625 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3626 addrconf_forward_change();
3629 rt6_purge_dflt_routers();
3635 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3636 int __user
*name
, int nlen
,
3637 void __user
*oldval
,
3638 size_t __user
*oldlenp
,
3639 void __user
*newval
, size_t newlen
)
3641 int *valp
= table
->data
;
3644 if (!newval
|| !newlen
)
3646 if (newlen
!= sizeof(int))
3648 if (get_user(new, (int __user
*)newval
))
3652 if (oldval
&& oldlenp
) {
3654 if (get_user(len
, oldlenp
))
3657 if (len
> table
->maxlen
)
3658 len
= table
->maxlen
;
3659 if (copy_to_user(oldval
, valp
, len
))
3661 if (put_user(len
, oldlenp
))
3666 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3667 if (valp
!= &ipv6_devconf
.forwarding
) {
3668 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3670 if (unlikely(idev
== NULL
))
3672 changed
= (!*valp
) ^ (!new);
3675 dev_forward_change(idev
);
3678 addrconf_forward_change();
3682 rt6_purge_dflt_routers();
3689 static struct addrconf_sysctl_table
3691 struct ctl_table_header
*sysctl_header
;
3692 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3693 ctl_table addrconf_dev
[2];
3694 ctl_table addrconf_conf_dir
[2];
3695 ctl_table addrconf_proto_dir
[2];
3696 ctl_table addrconf_root_dir
[2];
3697 } addrconf_sysctl __read_mostly
= {
3698 .sysctl_header
= NULL
,
3701 .ctl_name
= NET_IPV6_FORWARDING
,
3702 .procname
= "forwarding",
3703 .data
= &ipv6_devconf
.forwarding
,
3704 .maxlen
= sizeof(int),
3706 .proc_handler
= &addrconf_sysctl_forward
,
3707 .strategy
= &addrconf_sysctl_forward_strategy
,
3710 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3711 .procname
= "hop_limit",
3712 .data
= &ipv6_devconf
.hop_limit
,
3713 .maxlen
= sizeof(int),
3715 .proc_handler
= proc_dointvec
,
3718 .ctl_name
= NET_IPV6_MTU
,
3720 .data
= &ipv6_devconf
.mtu6
,
3721 .maxlen
= sizeof(int),
3723 .proc_handler
= &proc_dointvec
,
3726 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3727 .procname
= "accept_ra",
3728 .data
= &ipv6_devconf
.accept_ra
,
3729 .maxlen
= sizeof(int),
3731 .proc_handler
= &proc_dointvec
,
3734 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3735 .procname
= "accept_redirects",
3736 .data
= &ipv6_devconf
.accept_redirects
,
3737 .maxlen
= sizeof(int),
3739 .proc_handler
= &proc_dointvec
,
3742 .ctl_name
= NET_IPV6_AUTOCONF
,
3743 .procname
= "autoconf",
3744 .data
= &ipv6_devconf
.autoconf
,
3745 .maxlen
= sizeof(int),
3747 .proc_handler
= &proc_dointvec
,
3750 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3751 .procname
= "dad_transmits",
3752 .data
= &ipv6_devconf
.dad_transmits
,
3753 .maxlen
= sizeof(int),
3755 .proc_handler
= &proc_dointvec
,
3758 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3759 .procname
= "router_solicitations",
3760 .data
= &ipv6_devconf
.rtr_solicits
,
3761 .maxlen
= sizeof(int),
3763 .proc_handler
= &proc_dointvec
,
3766 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3767 .procname
= "router_solicitation_interval",
3768 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3769 .maxlen
= sizeof(int),
3771 .proc_handler
= &proc_dointvec_jiffies
,
3772 .strategy
= &sysctl_jiffies
,
3775 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3776 .procname
= "router_solicitation_delay",
3777 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3778 .maxlen
= sizeof(int),
3780 .proc_handler
= &proc_dointvec_jiffies
,
3781 .strategy
= &sysctl_jiffies
,
3784 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3785 .procname
= "force_mld_version",
3786 .data
= &ipv6_devconf
.force_mld_version
,
3787 .maxlen
= sizeof(int),
3789 .proc_handler
= &proc_dointvec
,
3791 #ifdef CONFIG_IPV6_PRIVACY
3793 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3794 .procname
= "use_tempaddr",
3795 .data
= &ipv6_devconf
.use_tempaddr
,
3796 .maxlen
= sizeof(int),
3798 .proc_handler
= &proc_dointvec
,
3801 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3802 .procname
= "temp_valid_lft",
3803 .data
= &ipv6_devconf
.temp_valid_lft
,
3804 .maxlen
= sizeof(int),
3806 .proc_handler
= &proc_dointvec
,
3809 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3810 .procname
= "temp_prefered_lft",
3811 .data
= &ipv6_devconf
.temp_prefered_lft
,
3812 .maxlen
= sizeof(int),
3814 .proc_handler
= &proc_dointvec
,
3817 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3818 .procname
= "regen_max_retry",
3819 .data
= &ipv6_devconf
.regen_max_retry
,
3820 .maxlen
= sizeof(int),
3822 .proc_handler
= &proc_dointvec
,
3825 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3826 .procname
= "max_desync_factor",
3827 .data
= &ipv6_devconf
.max_desync_factor
,
3828 .maxlen
= sizeof(int),
3830 .proc_handler
= &proc_dointvec
,
3834 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3835 .procname
= "max_addresses",
3836 .data
= &ipv6_devconf
.max_addresses
,
3837 .maxlen
= sizeof(int),
3839 .proc_handler
= &proc_dointvec
,
3842 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3843 .procname
= "accept_ra_defrtr",
3844 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3845 .maxlen
= sizeof(int),
3847 .proc_handler
= &proc_dointvec
,
3850 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3851 .procname
= "accept_ra_pinfo",
3852 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3853 .maxlen
= sizeof(int),
3855 .proc_handler
= &proc_dointvec
,
3857 #ifdef CONFIG_IPV6_ROUTER_PREF
3859 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3860 .procname
= "accept_ra_rtr_pref",
3861 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3862 .maxlen
= sizeof(int),
3864 .proc_handler
= &proc_dointvec
,
3867 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
3868 .procname
= "router_probe_interval",
3869 .data
= &ipv6_devconf
.rtr_probe_interval
,
3870 .maxlen
= sizeof(int),
3872 .proc_handler
= &proc_dointvec_jiffies
,
3873 .strategy
= &sysctl_jiffies
,
3875 #ifdef CONFIG_IPV6_ROUTE_INFO
3877 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
3878 .procname
= "accept_ra_rt_info_max_plen",
3879 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
3880 .maxlen
= sizeof(int),
3882 .proc_handler
= &proc_dointvec
,
3887 .ctl_name
= NET_IPV6_PROXY_NDP
,
3888 .procname
= "proxy_ndp",
3889 .data
= &ipv6_devconf
.proxy_ndp
,
3890 .maxlen
= sizeof(int),
3892 .proc_handler
= &proc_dointvec
,
3895 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
3896 .procname
= "accept_source_route",
3897 .data
= &ipv6_devconf
.accept_source_route
,
3898 .maxlen
= sizeof(int),
3900 .proc_handler
= &proc_dointvec
,
3903 .ctl_name
= 0, /* sentinel */
3908 .ctl_name
= NET_PROTO_CONF_ALL
,
3911 .child
= addrconf_sysctl
.addrconf_vars
,
3914 .ctl_name
= 0, /* sentinel */
3917 .addrconf_conf_dir
= {
3919 .ctl_name
= NET_IPV6_CONF
,
3922 .child
= addrconf_sysctl
.addrconf_dev
,
3925 .ctl_name
= 0, /* sentinel */
3928 .addrconf_proto_dir
= {
3930 .ctl_name
= NET_IPV6
,
3933 .child
= addrconf_sysctl
.addrconf_conf_dir
,
3936 .ctl_name
= 0, /* sentinel */
3939 .addrconf_root_dir
= {
3941 .ctl_name
= CTL_NET
,
3944 .child
= addrconf_sysctl
.addrconf_proto_dir
,
3947 .ctl_name
= 0, /* sentinel */
3952 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
3955 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
3956 struct addrconf_sysctl_table
*t
;
3957 char *dev_name
= NULL
;
3959 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
3962 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
3963 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
3964 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
3967 dev_name
= dev
->name
;
3968 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
3970 dev_name
= "default";
3971 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
3975 * Make a copy of dev_name, because '.procname' is regarded as const
3976 * by sysctl and we wouldn't want anyone to change it under our feet
3977 * (see SIOCSIFNAME).
3979 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
3983 t
->addrconf_dev
[0].procname
= dev_name
;
3985 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
3986 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
3987 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
3988 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
3990 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
3991 if (t
->sysctl_header
== NULL
)
4006 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4009 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4011 unregister_sysctl_table(t
->sysctl_header
);
4012 kfree(t
->addrconf_dev
[0].procname
);
4024 int register_inet6addr_notifier(struct notifier_block
*nb
)
4026 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4029 EXPORT_SYMBOL(register_inet6addr_notifier
);
4031 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4033 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4036 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4039 * Init / cleanup code
4042 int __init
addrconf_init(void)
4046 /* The addrconf netdev notifier requires that loopback_dev
4047 * has it's ipv6 private information allocated and setup
4048 * before it can bring up and give link-local addresses
4049 * to other devices which are up.
4051 * Unfortunately, loopback_dev is not necessarily the first
4052 * entry in the global dev_base list of net devices. In fact,
4053 * it is likely to be the very last entry on that list.
4054 * So this causes the notifier registry below to try and
4055 * give link-local addresses to all devices besides loopback_dev
4056 * first, then loopback_dev, which cases all the non-loopback_dev
4057 * devices to fail to get a link-local address.
4059 * So, as a temporary fix, allocate the ipv6 structure for
4060 * loopback_dev first by hand.
4061 * Longer term, all of the dependencies ipv6 has upon the loopback
4062 * device and it being up should be removed.
4065 if (!ipv6_add_dev(&loopback_dev
))
4071 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4073 register_netdevice_notifier(&ipv6_dev_notf
);
4076 rtnetlink_links
[PF_INET6
] = inet6_rtnetlink_table
;
4077 #ifdef CONFIG_SYSCTL
4078 addrconf_sysctl
.sysctl_header
=
4079 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4080 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4086 void __exit
addrconf_cleanup(void)
4088 struct net_device
*dev
;
4089 struct inet6_dev
*idev
;
4090 struct inet6_ifaddr
*ifa
;
4093 unregister_netdevice_notifier(&ipv6_dev_notf
);
4095 rtnetlink_links
[PF_INET6
] = NULL
;
4096 #ifdef CONFIG_SYSCTL
4097 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4098 addrconf_sysctl_unregister(&ipv6_devconf
);
4107 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
4108 if ((idev
= __in6_dev_get(dev
)) == NULL
)
4110 addrconf_ifdown(dev
, 1);
4112 addrconf_ifdown(&loopback_dev
, 2);
4118 write_lock_bh(&addrconf_hash_lock
);
4119 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4120 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4121 struct inet6_ifaddr
*bifa
;
4124 ifa
= ifa
->lst_next
;
4125 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4126 /* Do not free it; something is wrong.
4127 Now we can investigate it with debugger.
4131 write_unlock_bh(&addrconf_hash_lock
);
4133 del_timer(&addr_chk_timer
);
4137 #ifdef CONFIG_PROC_FS
4138 proc_net_remove("if_inet6");