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
;
534 * part one of RFC 4429, section 3.3
535 * We should not configure an address as
536 * optimistic if we do not yet know the link
537 * layer address of our nexhop router
540 if (rt
->rt6i_nexthop
== NULL
)
541 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
548 /* Add to big hash table */
549 hash
= ipv6_addr_hash(addr
);
551 ifa
->lst_next
= inet6_addr_lst
[hash
];
552 inet6_addr_lst
[hash
] = ifa
;
554 write_unlock(&addrconf_hash_lock
);
556 write_lock(&idev
->lock
);
557 /* Add to inet6_dev unicast addr list. */
558 ipv6_link_dev_addr(idev
, ifa
);
560 #ifdef CONFIG_IPV6_PRIVACY
561 if (ifa
->flags
&IFA_F_TEMPORARY
) {
562 ifa
->tmp_next
= idev
->tempaddr_list
;
563 idev
->tempaddr_list
= ifa
;
569 write_unlock(&idev
->lock
);
571 rcu_read_unlock_bh();
573 if (likely(err
== 0))
574 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
582 write_unlock(&addrconf_hash_lock
);
586 /* This function wants to get referenced ifp and releases it before return */
588 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
590 struct inet6_ifaddr
*ifa
, **ifap
;
591 struct inet6_dev
*idev
= ifp
->idev
;
593 int deleted
= 0, onlink
= 0;
594 unsigned long expires
= jiffies
;
596 hash
= ipv6_addr_hash(&ifp
->addr
);
600 write_lock_bh(&addrconf_hash_lock
);
601 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
602 ifap
= &ifa
->lst_next
) {
604 *ifap
= ifa
->lst_next
;
606 ifa
->lst_next
= NULL
;
610 write_unlock_bh(&addrconf_hash_lock
);
612 write_lock_bh(&idev
->lock
);
613 #ifdef CONFIG_IPV6_PRIVACY
614 if (ifp
->flags
&IFA_F_TEMPORARY
) {
615 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
616 ifap
= &ifa
->tmp_next
) {
618 *ifap
= ifa
->tmp_next
;
620 in6_ifa_put(ifp
->ifpub
);
624 ifa
->tmp_next
= NULL
;
631 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
633 *ifap
= ifa
->if_next
;
636 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
640 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
641 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
643 if (ifa
->flags
& IFA_F_PERMANENT
) {
648 unsigned long lifetime
;
653 spin_lock(&ifa
->lock
);
654 lifetime
= min_t(unsigned long,
655 ifa
->valid_lft
, 0x7fffffffUL
/HZ
);
656 if (time_before(expires
,
657 ifa
->tstamp
+ lifetime
* HZ
))
658 expires
= ifa
->tstamp
+ lifetime
* HZ
;
659 spin_unlock(&ifa
->lock
);
663 ifap
= &ifa
->if_next
;
665 write_unlock_bh(&idev
->lock
);
667 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
669 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
671 addrconf_del_timer(ifp
);
674 * Purge or update corresponding prefix
676 * 1) we don't purge prefix here if address was not permanent.
677 * prefix is managed by its own lifetime.
678 * 2) if there're no addresses, delete prefix.
679 * 3) if there're still other permanent address(es),
680 * corresponding prefix is still permanent.
681 * 4) otherwise, update prefix lifetime to the
682 * longest valid lifetime among the corresponding
683 * addresses on the device.
684 * Note: subsequent RA will update lifetime.
688 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
689 struct in6_addr prefix
;
692 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
693 rt
= rt6_lookup(&prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
695 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
699 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
700 rt
->rt6i_expires
= expires
;
701 rt
->rt6i_flags
|= RTF_EXPIRES
;
704 dst_release(&rt
->u
.dst
);
710 #ifdef CONFIG_IPV6_PRIVACY
711 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
713 struct inet6_dev
*idev
= ifp
->idev
;
714 struct in6_addr addr
, *tmpaddr
;
715 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
721 write_lock(&idev
->lock
);
723 spin_lock_bh(&ift
->lock
);
724 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
725 spin_unlock_bh(&ift
->lock
);
732 if (idev
->cnf
.use_tempaddr
<= 0) {
733 write_unlock(&idev
->lock
);
735 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
740 spin_lock_bh(&ifp
->lock
);
741 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
742 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
743 spin_unlock_bh(&ifp
->lock
);
744 write_unlock(&idev
->lock
);
746 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
752 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
753 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
754 spin_unlock_bh(&ifp
->lock
);
755 write_unlock(&idev
->lock
);
757 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
763 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
764 tmp_valid_lft
= min_t(__u32
,
766 idev
->cnf
.temp_valid_lft
);
767 tmp_prefered_lft
= min_t(__u32
,
769 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
770 tmp_plen
= ifp
->prefix_len
;
771 max_addresses
= idev
->cnf
.max_addresses
;
772 tmp_cstamp
= ifp
->cstamp
;
773 tmp_tstamp
= ifp
->tstamp
;
774 spin_unlock_bh(&ifp
->lock
);
776 write_unlock(&idev
->lock
);
778 addr_flags
= IFA_F_TEMPORARY
;
779 /* set in addrconf_prefix_rcv() */
780 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
781 addr_flags
|= IFA_F_OPTIMISTIC
;
783 ift
= !max_addresses
||
784 ipv6_count_addresses(idev
) < max_addresses
?
785 ipv6_add_addr(idev
, &addr
, tmp_plen
,
786 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
788 if (!ift
|| IS_ERR(ift
)) {
792 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
794 write_lock(&idev
->lock
);
798 spin_lock_bh(&ift
->lock
);
800 ift
->valid_lft
= tmp_valid_lft
;
801 ift
->prefered_lft
= tmp_prefered_lft
;
802 ift
->cstamp
= tmp_cstamp
;
803 ift
->tstamp
= tmp_tstamp
;
804 spin_unlock_bh(&ift
->lock
);
806 addrconf_dad_start(ift
, 0);
815 * Choose an appropriate source address (RFC3484)
817 struct ipv6_saddr_score
{
825 #define IPV6_SADDR_SCORE_LOCAL 0x0001
826 #define IPV6_SADDR_SCORE_PREFERRED 0x0004
827 #define IPV6_SADDR_SCORE_HOA 0x0008
828 #define IPV6_SADDR_SCORE_OIF 0x0010
829 #define IPV6_SADDR_SCORE_LABEL 0x0020
830 #define IPV6_SADDR_SCORE_PRIVACY 0x0040
832 static inline int ipv6_saddr_preferred(int type
)
834 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
835 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
840 /* static matching label */
841 static inline int ipv6_saddr_label(const struct in6_addr
*addr
, int type
)
844 * prefix (longest match) label
845 * -----------------------------
854 if (type
& IPV6_ADDR_LOOPBACK
)
856 else if (type
& IPV6_ADDR_COMPATv4
)
858 else if (type
& IPV6_ADDR_MAPPED
)
860 else if (addr
->s6_addr32
[0] == htonl(0x20010000))
862 else if (addr
->s6_addr16
[0] == htons(0x2002))
864 else if ((addr
->s6_addr
[0] & 0xfe) == 0xfc)
869 int ipv6_dev_get_saddr(struct net_device
*daddr_dev
,
870 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
872 struct ipv6_saddr_score hiscore
;
873 struct inet6_ifaddr
*ifa_result
= NULL
;
874 int daddr_type
= __ipv6_addr_type(daddr
);
875 int daddr_scope
= __ipv6_addr_src_scope(daddr_type
);
876 u32 daddr_label
= ipv6_saddr_label(daddr
, daddr_type
);
877 struct net_device
*dev
;
879 memset(&hiscore
, 0, sizeof(hiscore
));
881 read_lock(&dev_base_lock
);
884 for (dev
= dev_base
; dev
; dev
=dev
->next
) {
885 struct inet6_dev
*idev
;
886 struct inet6_ifaddr
*ifa
;
888 /* Rule 0: Candidate Source Address (section 4)
889 * - multicast and link-local destination address,
890 * the set of candidate source address MUST only
891 * include addresses assigned to interfaces
892 * belonging to the same link as the outgoing
894 * (- For site-local destination addresses, the
895 * set of candidate source addresses MUST only
896 * include addresses assigned to interfaces
897 * belonging to the same site as the outgoing
900 if ((daddr_type
& IPV6_ADDR_MULTICAST
||
901 daddr_scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
902 daddr_dev
&& dev
!= daddr_dev
)
905 idev
= __in6_dev_get(dev
);
909 read_lock_bh(&idev
->lock
);
910 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
911 struct ipv6_saddr_score score
;
913 score
.addr_type
= __ipv6_addr_type(&ifa
->addr
);
916 * - Tentative Address (RFC2462 section 5.4)
917 * - A tentative address is not considered
918 * "assigned to an interface" in the traditional
919 * sense, unless it is also flagged as optimistic.
920 * - Candidate Source Address (section 4)
921 * - In any case, anycast addresses, multicast
922 * addresses, and the unspecified address MUST
923 * NOT be included in a candidate set.
925 if ((ifa
->flags
& IFA_F_TENTATIVE
) &&
926 (!(ifa
->flags
& IFA_F_OPTIMISTIC
)))
928 if (unlikely(score
.addr_type
== IPV6_ADDR_ANY
||
929 score
.addr_type
& IPV6_ADDR_MULTICAST
)) {
930 LIMIT_NETDEBUG(KERN_DEBUG
931 "ADDRCONF: unspecified / multicast address"
932 "assigned as unicast address on %s",
942 if (ifa_result
== NULL
) {
943 /* record it if the first available entry */
947 /* Rule 1: Prefer same address */
948 if (hiscore
.rule
< 1) {
949 if (ipv6_addr_equal(&ifa_result
->addr
, daddr
))
950 hiscore
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
953 if (ipv6_addr_equal(&ifa
->addr
, daddr
)) {
954 score
.attrs
|= IPV6_SADDR_SCORE_LOCAL
;
955 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)) {
960 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LOCAL
)
964 /* Rule 2: Prefer appropriate scope */
965 if (hiscore
.rule
< 2) {
966 hiscore
.scope
= __ipv6_addr_src_scope(hiscore
.addr_type
);
969 score
.scope
= __ipv6_addr_src_scope(score
.addr_type
);
970 if (hiscore
.scope
< score
.scope
) {
971 if (hiscore
.scope
< daddr_scope
) {
976 } else if (score
.scope
< hiscore
.scope
) {
977 if (score
.scope
< daddr_scope
)
978 break; /* addresses sorted by scope */
985 /* Rule 3: Avoid deprecated and optimistic addresses */
986 if (hiscore
.rule
< 3) {
987 if (ipv6_saddr_preferred(hiscore
.addr_type
) ||
988 (((ifa_result
->flags
&
989 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0)))
990 hiscore
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
993 if (ipv6_saddr_preferred(score
.addr_type
) ||
994 (((ifa_result
->flags
&
995 (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
)) == 0))) {
996 score
.attrs
|= IPV6_SADDR_SCORE_PREFERRED
;
997 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)) {
1002 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PREFERRED
)
1006 /* Rule 4: Prefer home address */
1007 #ifdef CONFIG_IPV6_MIP6
1008 if (hiscore
.rule
< 4) {
1009 if (ifa_result
->flags
& IFA_F_HOMEADDRESS
)
1010 hiscore
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1013 if (ifa
->flags
& IFA_F_HOMEADDRESS
) {
1014 score
.attrs
|= IPV6_SADDR_SCORE_HOA
;
1015 if (!(ifa_result
->flags
& IFA_F_HOMEADDRESS
)) {
1020 if (hiscore
.attrs
& IPV6_SADDR_SCORE_HOA
)
1024 if (hiscore
.rule
< 4)
1028 /* Rule 5: Prefer outgoing interface */
1029 if (hiscore
.rule
< 5) {
1030 if (daddr_dev
== NULL
||
1031 daddr_dev
== ifa_result
->idev
->dev
)
1032 hiscore
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1035 if (daddr_dev
== NULL
||
1036 daddr_dev
== ifa
->idev
->dev
) {
1037 score
.attrs
|= IPV6_SADDR_SCORE_OIF
;
1038 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)) {
1043 if (hiscore
.attrs
& IPV6_SADDR_SCORE_OIF
)
1047 /* Rule 6: Prefer matching label */
1048 if (hiscore
.rule
< 6) {
1049 if (ipv6_saddr_label(&ifa_result
->addr
, hiscore
.addr_type
) == daddr_label
)
1050 hiscore
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1053 if (ipv6_saddr_label(&ifa
->addr
, score
.addr_type
) == daddr_label
) {
1054 score
.attrs
|= IPV6_SADDR_SCORE_LABEL
;
1055 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)) {
1060 if (hiscore
.attrs
& IPV6_SADDR_SCORE_LABEL
)
1064 #ifdef CONFIG_IPV6_PRIVACY
1065 /* Rule 7: Prefer public address
1066 * Note: prefer temprary address if use_tempaddr >= 2
1068 if (hiscore
.rule
< 7) {
1069 if ((!(ifa_result
->flags
& IFA_F_TEMPORARY
)) ^
1070 (ifa_result
->idev
->cnf
.use_tempaddr
>= 2))
1071 hiscore
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1074 if ((!(ifa
->flags
& IFA_F_TEMPORARY
)) ^
1075 (ifa
->idev
->cnf
.use_tempaddr
>= 2)) {
1076 score
.attrs
|= IPV6_SADDR_SCORE_PRIVACY
;
1077 if (!(hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)) {
1082 if (hiscore
.attrs
& IPV6_SADDR_SCORE_PRIVACY
)
1086 if (hiscore
.rule
< 7)
1089 /* Rule 8: Use longest matching prefix */
1090 if (hiscore
.rule
< 8) {
1091 hiscore
.matchlen
= ipv6_addr_diff(&ifa_result
->addr
, daddr
);
1094 score
.matchlen
= ipv6_addr_diff(&ifa
->addr
, daddr
);
1095 if (score
.matchlen
> hiscore
.matchlen
) {
1100 else if (score
.matchlen
< hiscore
.matchlen
)
1104 /* Final Rule: choose first available one */
1108 in6_ifa_put(ifa_result
);
1113 read_unlock_bh(&idev
->lock
);
1116 read_unlock(&dev_base_lock
);
1119 return -EADDRNOTAVAIL
;
1121 ipv6_addr_copy(saddr
, &ifa_result
->addr
);
1122 in6_ifa_put(ifa_result
);
1127 int ipv6_get_saddr(struct dst_entry
*dst
,
1128 struct in6_addr
*daddr
, struct in6_addr
*saddr
)
1130 return ipv6_dev_get_saddr(dst
? ip6_dst_idev(dst
)->dev
: NULL
, daddr
, saddr
);
1133 EXPORT_SYMBOL(ipv6_get_saddr
);
1135 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1136 unsigned char banned_flags
)
1138 struct inet6_dev
*idev
;
1139 int err
= -EADDRNOTAVAIL
;
1142 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1143 struct inet6_ifaddr
*ifp
;
1145 read_lock_bh(&idev
->lock
);
1146 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1147 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1148 ipv6_addr_copy(addr
, &ifp
->addr
);
1153 read_unlock_bh(&idev
->lock
);
1159 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1162 struct inet6_ifaddr
*ifp
;
1164 read_lock_bh(&idev
->lock
);
1165 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1167 read_unlock_bh(&idev
->lock
);
1171 int ipv6_chk_addr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1173 struct inet6_ifaddr
* ifp
;
1174 u8 hash
= ipv6_addr_hash(addr
);
1176 read_lock_bh(&addrconf_hash_lock
);
1177 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1178 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1179 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1180 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1181 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1185 read_unlock_bh(&addrconf_hash_lock
);
1189 EXPORT_SYMBOL(ipv6_chk_addr
);
1192 int ipv6_chk_same_addr(const struct in6_addr
*addr
, struct net_device
*dev
)
1194 struct inet6_ifaddr
* ifp
;
1195 u8 hash
= ipv6_addr_hash(addr
);
1197 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1198 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1199 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1206 struct inet6_ifaddr
* ipv6_get_ifaddr(struct in6_addr
*addr
, struct net_device
*dev
, int strict
)
1208 struct inet6_ifaddr
* ifp
;
1209 u8 hash
= ipv6_addr_hash(addr
);
1211 read_lock_bh(&addrconf_hash_lock
);
1212 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1213 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1214 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1215 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1221 read_unlock_bh(&addrconf_hash_lock
);
1226 int ipv6_rcv_saddr_equal(const struct sock
*sk
, const struct sock
*sk2
)
1228 const struct in6_addr
*sk_rcv_saddr6
= &inet6_sk(sk
)->rcv_saddr
;
1229 const struct in6_addr
*sk2_rcv_saddr6
= inet6_rcv_saddr(sk2
);
1230 __be32 sk_rcv_saddr
= inet_sk(sk
)->rcv_saddr
;
1231 __be32 sk2_rcv_saddr
= inet_rcv_saddr(sk2
);
1232 int sk_ipv6only
= ipv6_only_sock(sk
);
1233 int sk2_ipv6only
= inet_v6_ipv6only(sk2
);
1234 int addr_type
= ipv6_addr_type(sk_rcv_saddr6
);
1235 int addr_type2
= sk2_rcv_saddr6
? ipv6_addr_type(sk2_rcv_saddr6
) : IPV6_ADDR_MAPPED
;
1237 if (!sk2_rcv_saddr
&& !sk_ipv6only
)
1240 if (addr_type2
== IPV6_ADDR_ANY
&&
1241 !(sk2_ipv6only
&& addr_type
== IPV6_ADDR_MAPPED
))
1244 if (addr_type
== IPV6_ADDR_ANY
&&
1245 !(sk_ipv6only
&& addr_type2
== IPV6_ADDR_MAPPED
))
1248 if (sk2_rcv_saddr6
&&
1249 ipv6_addr_equal(sk_rcv_saddr6
, sk2_rcv_saddr6
))
1252 if (addr_type
== IPV6_ADDR_MAPPED
&&
1254 (!sk2_rcv_saddr
|| !sk_rcv_saddr
|| sk_rcv_saddr
== sk2_rcv_saddr
))
1260 /* Gets referenced address, destroys ifaddr */
1262 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
)
1264 if (ifp
->flags
&IFA_F_PERMANENT
) {
1265 spin_lock_bh(&ifp
->lock
);
1266 addrconf_del_timer(ifp
);
1267 ifp
->flags
|= IFA_F_TENTATIVE
;
1268 spin_unlock_bh(&ifp
->lock
);
1270 #ifdef CONFIG_IPV6_PRIVACY
1271 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1272 struct inet6_ifaddr
*ifpub
;
1273 spin_lock_bh(&ifp
->lock
);
1276 in6_ifa_hold(ifpub
);
1277 spin_unlock_bh(&ifp
->lock
);
1278 ipv6_create_tempaddr(ifpub
, ifp
);
1281 spin_unlock_bh(&ifp
->lock
);
1289 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1291 if (net_ratelimit())
1292 printk(KERN_INFO
"%s: duplicate address detected!\n", ifp
->idev
->dev
->name
);
1293 addrconf_dad_stop(ifp
);
1296 /* Join to solicited addr multicast group. */
1298 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1300 struct in6_addr maddr
;
1302 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1305 addrconf_addr_solict_mult(addr
, &maddr
);
1306 ipv6_dev_mc_inc(dev
, &maddr
);
1309 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1311 struct in6_addr maddr
;
1313 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1316 addrconf_addr_solict_mult(addr
, &maddr
);
1317 __ipv6_dev_mc_dec(idev
, &maddr
);
1320 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1322 struct in6_addr addr
;
1323 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1324 if (ipv6_addr_any(&addr
))
1326 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1329 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1331 struct in6_addr addr
;
1332 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1333 if (ipv6_addr_any(&addr
))
1335 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1338 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1340 if (dev
->addr_len
!= ETH_ALEN
)
1342 memcpy(eui
, dev
->dev_addr
, 3);
1343 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1346 * The zSeries OSA network cards can be shared among various
1347 * OS instances, but the OSA cards have only one MAC address.
1348 * This leads to duplicate address conflicts in conjunction
1349 * with IPv6 if more than one instance uses the same card.
1351 * The driver for these cards can deliver a unique 16-bit
1352 * identifier for each instance sharing the same card. It is
1353 * placed instead of 0xFFFE in the interface identifier. The
1354 * "u" bit of the interface identifier is not inverted in this
1355 * case. Hence the resulting interface identifier has local
1356 * scope according to RFC2373.
1359 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1360 eui
[4] = dev
->dev_id
& 0xFF;
1369 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1371 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1372 if (dev
->addr_len
!= ARCNET_ALEN
)
1375 eui
[7] = *(u8
*)dev
->dev_addr
;
1379 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1381 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1383 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1388 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1390 switch (dev
->type
) {
1393 case ARPHRD_IEEE802_TR
:
1394 return addrconf_ifid_eui48(eui
, dev
);
1396 return addrconf_ifid_arcnet(eui
, dev
);
1397 case ARPHRD_INFINIBAND
:
1398 return addrconf_ifid_infiniband(eui
, dev
);
1403 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1406 struct inet6_ifaddr
*ifp
;
1408 read_lock_bh(&idev
->lock
);
1409 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1410 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1411 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1416 read_unlock_bh(&idev
->lock
);
1420 #ifdef CONFIG_IPV6_PRIVACY
1421 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1422 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1425 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1426 idev
->rndid
[0] &= ~0x02;
1429 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1430 * check if generated address is not inappropriate
1432 * - Reserved subnet anycast (RFC 2526)
1433 * 11111101 11....11 1xxxxxxx
1434 * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
1435 * 00-00-5E-FE-xx-xx-xx-xx
1437 * - XXX: already assigned to an address on the device
1439 if (idev
->rndid
[0] == 0xfd &&
1440 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1441 (idev
->rndid
[7]&0x80))
1443 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1444 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1446 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1453 static void ipv6_regen_rndid(unsigned long data
)
1455 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1456 unsigned long expires
;
1459 write_lock_bh(&idev
->lock
);
1464 if (__ipv6_regen_rndid(idev
) < 0)
1468 idev
->cnf
.temp_prefered_lft
* HZ
-
1469 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1470 if (time_before(expires
, jiffies
)) {
1472 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1477 if (!mod_timer(&idev
->regen_timer
, expires
))
1481 write_unlock_bh(&idev
->lock
);
1482 rcu_read_unlock_bh();
1486 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1489 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1490 ret
= __ipv6_regen_rndid(idev
);
1500 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1501 unsigned long expires
, u32 flags
)
1503 struct fib6_config cfg
= {
1504 .fc_table
= RT6_TABLE_PREFIX
,
1505 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1506 .fc_ifindex
= dev
->ifindex
,
1507 .fc_expires
= expires
,
1509 .fc_flags
= RTF_UP
| flags
,
1512 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1514 /* Prevent useless cloning on PtP SIT.
1515 This thing is done here expecting that the whole
1516 class of non-broadcast devices need not cloning.
1518 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1519 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1520 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1523 ip6_route_add(&cfg
);
1526 /* Create "default" multicast route to the interface */
1528 static void addrconf_add_mroute(struct net_device
*dev
)
1530 struct fib6_config cfg
= {
1531 .fc_table
= RT6_TABLE_LOCAL
,
1532 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1533 .fc_ifindex
= dev
->ifindex
,
1538 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1540 ip6_route_add(&cfg
);
1543 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1544 static void sit_route_add(struct net_device
*dev
)
1546 struct fib6_config cfg
= {
1547 .fc_table
= RT6_TABLE_MAIN
,
1548 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1549 .fc_ifindex
= dev
->ifindex
,
1551 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1554 /* prefix length - 96 bits "::d.d.d.d" */
1555 ip6_route_add(&cfg
);
1559 static void addrconf_add_lroute(struct net_device
*dev
)
1561 struct in6_addr addr
;
1563 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1564 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1567 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1569 struct inet6_dev
*idev
;
1573 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1576 /* Add default multicast route */
1577 addrconf_add_mroute(dev
);
1579 /* Add link local route */
1580 addrconf_add_lroute(dev
);
1584 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1586 struct prefix_info
*pinfo
;
1590 unsigned long rt_expires
;
1591 struct inet6_dev
*in6_dev
;
1593 pinfo
= (struct prefix_info
*) opt
;
1595 if (len
< sizeof(struct prefix_info
)) {
1596 ADBG(("addrconf: prefix option too short\n"));
1601 * Validation checks ([ADDRCONF], page 19)
1604 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1606 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1609 valid_lft
= ntohl(pinfo
->valid
);
1610 prefered_lft
= ntohl(pinfo
->prefered
);
1612 if (prefered_lft
> valid_lft
) {
1613 if (net_ratelimit())
1614 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1618 in6_dev
= in6_dev_get(dev
);
1620 if (in6_dev
== NULL
) {
1621 if (net_ratelimit())
1622 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1627 * Two things going on here:
1628 * 1) Add routes for on-link prefixes
1629 * 2) Configure prefixes with the auto flag set
1632 /* Avoid arithmetic overflow. Really, we could
1633 save rt_expires in seconds, likely valid_lft,
1634 but it would require division in fib gc, that it
1637 if (valid_lft
>= 0x7FFFFFFF/HZ
)
1638 rt_expires
= 0x7FFFFFFF - (0x7FFFFFFF % HZ
);
1640 rt_expires
= valid_lft
* HZ
;
1643 * We convert this (in jiffies) to clock_t later.
1644 * Avoid arithmetic overflow there as well.
1645 * Overflow can happen only if HZ < USER_HZ.
1647 if (HZ
< USER_HZ
&& rt_expires
> 0x7FFFFFFF / USER_HZ
)
1648 rt_expires
= 0x7FFFFFFF / USER_HZ
;
1650 if (pinfo
->onlink
) {
1651 struct rt6_info
*rt
;
1652 rt
= rt6_lookup(&pinfo
->prefix
, NULL
, dev
->ifindex
, 1);
1654 if (rt
&& ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0)) {
1655 if (rt
->rt6i_flags
&RTF_EXPIRES
) {
1656 if (valid_lft
== 0) {
1660 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1663 } else if (valid_lft
) {
1664 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1665 dev
, jiffies_to_clock_t(rt_expires
), RTF_ADDRCONF
|RTF_EXPIRES
|RTF_PREFIX_RT
);
1668 dst_release(&rt
->u
.dst
);
1671 /* Try to figure out our local address for this prefix */
1673 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1674 struct inet6_ifaddr
* ifp
;
1675 struct in6_addr addr
;
1676 int create
= 0, update_lft
= 0;
1678 if (pinfo
->prefix_len
== 64) {
1679 memcpy(&addr
, &pinfo
->prefix
, 8);
1680 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1681 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1682 in6_dev_put(in6_dev
);
1687 if (net_ratelimit())
1688 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1690 in6_dev_put(in6_dev
);
1695 ifp
= ipv6_get_ifaddr(&addr
, dev
, 1);
1697 if (ifp
== NULL
&& valid_lft
) {
1698 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1701 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1702 if (in6_dev
->cnf
.optimistic_dad
&&
1703 !ipv6_devconf
.forwarding
)
1704 addr_flags
= IFA_F_OPTIMISTIC
;
1707 /* Do not allow to create too much of autoconfigured
1708 * addresses; this would be too easy way to crash kernel.
1710 if (!max_addresses
||
1711 ipv6_count_addresses(in6_dev
) < max_addresses
)
1712 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1713 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1716 if (!ifp
|| IS_ERR(ifp
)) {
1717 in6_dev_put(in6_dev
);
1721 update_lft
= create
= 1;
1722 ifp
->cstamp
= jiffies
;
1723 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1729 #ifdef CONFIG_IPV6_PRIVACY
1730 struct inet6_ifaddr
*ift
;
1734 /* update lifetime (RFC2462 5.5.3 e) */
1735 spin_lock(&ifp
->lock
);
1737 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1738 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1741 if (!update_lft
&& stored_lft
) {
1742 if (valid_lft
> MIN_VALID_LIFETIME
||
1743 valid_lft
> stored_lft
)
1745 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1746 /* valid_lft <= stored_lft is always true */
1750 valid_lft
= MIN_VALID_LIFETIME
;
1751 if (valid_lft
< prefered_lft
)
1752 prefered_lft
= valid_lft
;
1758 ifp
->valid_lft
= valid_lft
;
1759 ifp
->prefered_lft
= prefered_lft
;
1762 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1763 spin_unlock(&ifp
->lock
);
1765 if (!(flags
&IFA_F_TENTATIVE
))
1766 ipv6_ifa_notify(0, ifp
);
1768 spin_unlock(&ifp
->lock
);
1770 #ifdef CONFIG_IPV6_PRIVACY
1771 read_lock_bh(&in6_dev
->lock
);
1772 /* update all temporary addresses in the list */
1773 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1775 * When adjusting the lifetimes of an existing
1776 * temporary address, only lower the lifetimes.
1777 * Implementations must not increase the
1778 * lifetimes of an existing temporary address
1779 * when processing a Prefix Information Option.
1781 spin_lock(&ift
->lock
);
1783 if (ift
->valid_lft
> valid_lft
&&
1784 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1785 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1786 if (ift
->prefered_lft
> prefered_lft
&&
1787 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1788 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1789 spin_unlock(&ift
->lock
);
1790 if (!(flags
&IFA_F_TENTATIVE
))
1791 ipv6_ifa_notify(0, ift
);
1794 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1796 * When a new public address is created as described in [ADDRCONF],
1797 * also create a new temporary address.
1799 read_unlock_bh(&in6_dev
->lock
);
1800 ipv6_create_tempaddr(ifp
, NULL
);
1802 read_unlock_bh(&in6_dev
->lock
);
1809 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
1810 in6_dev_put(in6_dev
);
1814 * Set destination address.
1815 * Special case for SIT interfaces where we create a new "virtual"
1818 int addrconf_set_dstaddr(void __user
*arg
)
1820 struct in6_ifreq ireq
;
1821 struct net_device
*dev
;
1827 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1830 dev
= __dev_get_by_index(ireq
.ifr6_ifindex
);
1836 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1837 if (dev
->type
== ARPHRD_SIT
) {
1840 struct ip_tunnel_parm p
;
1842 err
= -EADDRNOTAVAIL
;
1843 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
1846 memset(&p
, 0, sizeof(p
));
1847 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
1851 p
.iph
.protocol
= IPPROTO_IPV6
;
1853 ifr
.ifr_ifru
.ifru_data
= (void __user
*)&p
;
1855 oldfs
= get_fs(); set_fs(KERNEL_DS
);
1856 err
= dev
->do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
1861 if ((dev
= __dev_get_by_name(p
.name
)) == NULL
)
1863 err
= dev_open(dev
);
1874 * Manual configuration of address on an interface
1876 static int inet6_addr_add(int ifindex
, struct in6_addr
*pfx
, int plen
,
1877 __u8 ifa_flags
, __u32 prefered_lft
, __u32 valid_lft
)
1879 struct inet6_ifaddr
*ifp
;
1880 struct inet6_dev
*idev
;
1881 struct net_device
*dev
;
1883 u32 flags
= RTF_EXPIRES
;
1887 /* check the lifetime */
1888 if (!valid_lft
|| prefered_lft
> valid_lft
)
1891 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1894 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
1897 scope
= ipv6_addr_scope(pfx
);
1899 if (valid_lft
== INFINITY_LIFE_TIME
) {
1900 ifa_flags
|= IFA_F_PERMANENT
;
1902 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
1903 valid_lft
= 0x7FFFFFFF/HZ
;
1905 if (prefered_lft
== 0)
1906 ifa_flags
|= IFA_F_DEPRECATED
;
1907 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
1908 (prefered_lft
!= INFINITY_LIFE_TIME
))
1909 prefered_lft
= 0x7FFFFFFF/HZ
;
1911 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
1914 spin_lock_bh(&ifp
->lock
);
1915 ifp
->valid_lft
= valid_lft
;
1916 ifp
->prefered_lft
= prefered_lft
;
1917 ifp
->tstamp
= jiffies
;
1918 spin_unlock_bh(&ifp
->lock
);
1920 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
1921 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
1923 * Note that section 3.1 of RFC 4429 indicates
1924 * that the Optimistic flag should not be set for
1925 * manually configured addresses
1927 addrconf_dad_start(ifp
, 0);
1933 return PTR_ERR(ifp
);
1936 static int inet6_addr_del(int ifindex
, struct in6_addr
*pfx
, int plen
)
1938 struct inet6_ifaddr
*ifp
;
1939 struct inet6_dev
*idev
;
1940 struct net_device
*dev
;
1942 if ((dev
= __dev_get_by_index(ifindex
)) == NULL
)
1945 if ((idev
= __in6_dev_get(dev
)) == NULL
)
1948 read_lock_bh(&idev
->lock
);
1949 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1950 if (ifp
->prefix_len
== plen
&&
1951 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
1953 read_unlock_bh(&idev
->lock
);
1957 /* If the last address is deleted administratively,
1958 disable IPv6 on this interface.
1960 if (idev
->addr_list
== NULL
)
1961 addrconf_ifdown(idev
->dev
, 1);
1965 read_unlock_bh(&idev
->lock
);
1966 return -EADDRNOTAVAIL
;
1970 int addrconf_add_ifaddr(void __user
*arg
)
1972 struct in6_ifreq ireq
;
1975 if (!capable(CAP_NET_ADMIN
))
1978 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
1982 err
= inet6_addr_add(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
,
1983 IFA_F_PERMANENT
, INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
1988 int addrconf_del_ifaddr(void __user
*arg
)
1990 struct in6_ifreq ireq
;
1993 if (!capable(CAP_NET_ADMIN
))
1996 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2000 err
= inet6_addr_del(ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, ireq
.ifr6_prefixlen
);
2005 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2006 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2008 struct inet6_ifaddr
* ifp
;
2009 struct in6_addr addr
;
2010 struct net_device
*dev
;
2015 memset(&addr
, 0, sizeof(struct in6_addr
));
2016 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2018 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2019 addr
.s6_addr32
[0] = htonl(0xfe800000);
2022 scope
= IPV6_ADDR_COMPATv4
;
2025 if (addr
.s6_addr32
[3]) {
2026 ifp
= ipv6_add_addr(idev
, &addr
, 128, scope
, IFA_F_PERMANENT
);
2028 spin_lock_bh(&ifp
->lock
);
2029 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2030 spin_unlock_bh(&ifp
->lock
);
2031 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2037 for (dev
= dev_base
; dev
!= NULL
; dev
= dev
->next
) {
2038 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2039 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2040 struct in_ifaddr
* ifa
;
2044 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2047 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2049 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2051 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2052 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2056 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2061 ifp
= ipv6_add_addr(idev
, &addr
, plen
, flag
,
2064 spin_lock_bh(&ifp
->lock
);
2065 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2066 spin_unlock_bh(&ifp
->lock
);
2067 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2076 static void init_loopback(struct net_device
*dev
)
2078 struct inet6_dev
*idev
;
2079 struct inet6_ifaddr
* ifp
;
2085 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2086 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2090 ifp
= ipv6_add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
, IFA_F_PERMANENT
);
2092 spin_lock_bh(&ifp
->lock
);
2093 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2094 spin_unlock_bh(&ifp
->lock
);
2095 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2100 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2102 struct inet6_ifaddr
* ifp
;
2103 u32 addr_flags
= IFA_F_PERMANENT
;
2105 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2106 if (idev
->cnf
.optimistic_dad
&&
2107 !ipv6_devconf
.forwarding
)
2108 addr_flags
|= IFA_F_OPTIMISTIC
;
2112 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2114 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2115 addrconf_dad_start(ifp
, 0);
2120 static void addrconf_dev_config(struct net_device
*dev
)
2122 struct in6_addr addr
;
2123 struct inet6_dev
* idev
;
2127 if ((dev
->type
!= ARPHRD_ETHER
) &&
2128 (dev
->type
!= ARPHRD_FDDI
) &&
2129 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2130 (dev
->type
!= ARPHRD_ARCNET
) &&
2131 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2132 /* Alas, we support only Ethernet autoconfiguration. */
2136 idev
= addrconf_add_dev(dev
);
2140 memset(&addr
, 0, sizeof(struct in6_addr
));
2141 addr
.s6_addr32
[0] = htonl(0xFE800000);
2143 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2144 addrconf_add_linklocal(idev
, &addr
);
2147 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2148 static void addrconf_sit_config(struct net_device
*dev
)
2150 struct inet6_dev
*idev
;
2155 * Configure the tunnel with one of our IPv4
2156 * addresses... we should configure all of
2157 * our v4 addrs in the tunnel
2160 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2161 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2165 sit_add_v4_addrs(idev
);
2167 if (dev
->flags
&IFF_POINTOPOINT
) {
2168 addrconf_add_mroute(dev
);
2169 addrconf_add_lroute(dev
);
2176 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2178 struct in6_addr lladdr
;
2180 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2181 addrconf_add_linklocal(idev
, &lladdr
);
2187 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2189 struct net_device
*link_dev
;
2191 /* first try to inherit the link-local address from the link device */
2192 if (idev
->dev
->iflink
&&
2193 (link_dev
= __dev_get_by_index(idev
->dev
->iflink
))) {
2194 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2197 /* then try to inherit it from any device */
2198 for (link_dev
= dev_base
; link_dev
; link_dev
= link_dev
->next
) {
2199 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2202 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2206 * Autoconfigure tunnel with a link-local address so routing protocols,
2207 * DHCPv6, MLD etc. can be run over the virtual link
2210 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2212 struct inet6_dev
*idev
;
2216 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2217 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2220 ip6_tnl_add_linklocal(idev
);
2223 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2226 struct net_device
*dev
= (struct net_device
*) data
;
2227 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2228 int run_pending
= 0;
2231 case NETDEV_REGISTER
:
2233 idev
= ipv6_add_dev(dev
);
2235 printk(KERN_WARNING
"IPv6: add_dev failed for %s\n",
2241 if (event
== NETDEV_UP
) {
2242 if (!netif_carrier_ok(dev
)) {
2243 /* device is not ready yet. */
2245 "ADDRCONF(NETDEV_UP): %s: "
2246 "link is not ready\n",
2252 idev
->if_flags
|= IF_READY
;
2254 if (!netif_carrier_ok(dev
)) {
2255 /* device is still not ready. */
2260 if (idev
->if_flags
& IF_READY
) {
2261 /* device is already configured. */
2264 idev
->if_flags
|= IF_READY
;
2268 "ADDRCONF(NETDEV_CHANGE): %s: "
2269 "link becomes ready\n",
2276 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2278 addrconf_sit_config(dev
);
2281 case ARPHRD_TUNNEL6
:
2282 addrconf_ip6_tnl_config(dev
);
2284 case ARPHRD_LOOPBACK
:
2289 addrconf_dev_config(dev
);
2294 addrconf_dad_run(idev
);
2296 /* If the MTU changed during the interface down, when the
2297 interface up, the changed MTU must be reflected in the
2298 idev as well as routers.
2300 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2301 rt6_mtu_change(dev
, dev
->mtu
);
2302 idev
->cnf
.mtu6
= dev
->mtu
;
2304 idev
->tstamp
= jiffies
;
2305 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2306 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2307 stop IPv6 on this interface.
2309 if (dev
->mtu
< IPV6_MIN_MTU
)
2310 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2314 case NETDEV_CHANGEMTU
:
2315 if ( idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2316 rt6_mtu_change(dev
, dev
->mtu
);
2317 idev
->cnf
.mtu6
= dev
->mtu
;
2321 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2324 case NETDEV_UNREGISTER
:
2326 * Remove all addresses from this interface.
2328 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2331 case NETDEV_CHANGENAME
:
2332 #ifdef CONFIG_SYSCTL
2334 addrconf_sysctl_unregister(&idev
->cnf
);
2335 neigh_sysctl_unregister(idev
->nd_parms
);
2336 neigh_sysctl_register(dev
, idev
->nd_parms
,
2337 NET_IPV6
, NET_IPV6_NEIGH
, "ipv6",
2338 &ndisc_ifinfo_sysctl_change
,
2340 addrconf_sysctl_register(idev
, &idev
->cnf
);
2350 * addrconf module should be notified of a device going up
2352 static struct notifier_block ipv6_dev_notf
= {
2353 .notifier_call
= addrconf_notify
,
2357 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2359 struct inet6_dev
*idev
;
2360 struct inet6_ifaddr
*ifa
, **bifa
;
2365 if (dev
== &loopback_dev
&& how
== 1)
2369 neigh_ifdown(&nd_tbl
, dev
);
2371 idev
= __in6_dev_get(dev
);
2375 /* Step 1: remove reference to ipv6 device from parent device.
2381 /* protected by rtnl_lock */
2382 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2384 /* Step 1.5: remove snmp6 entry */
2385 snmp6_unregister_dev(idev
);
2389 /* Step 2: clear hash table */
2390 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2391 bifa
= &inet6_addr_lst
[i
];
2393 write_lock_bh(&addrconf_hash_lock
);
2394 while ((ifa
= *bifa
) != NULL
) {
2395 if (ifa
->idev
== idev
) {
2396 *bifa
= ifa
->lst_next
;
2397 ifa
->lst_next
= NULL
;
2398 addrconf_del_timer(ifa
);
2402 bifa
= &ifa
->lst_next
;
2404 write_unlock_bh(&addrconf_hash_lock
);
2407 write_lock_bh(&idev
->lock
);
2409 /* Step 3: clear flags for stateless addrconf */
2411 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2413 /* Step 4: clear address list */
2414 #ifdef CONFIG_IPV6_PRIVACY
2415 if (how
== 1 && del_timer(&idev
->regen_timer
))
2418 /* clear tempaddr list */
2419 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2420 idev
->tempaddr_list
= ifa
->tmp_next
;
2421 ifa
->tmp_next
= NULL
;
2423 write_unlock_bh(&idev
->lock
);
2424 spin_lock_bh(&ifa
->lock
);
2427 in6_ifa_put(ifa
->ifpub
);
2430 spin_unlock_bh(&ifa
->lock
);
2432 write_lock_bh(&idev
->lock
);
2435 while ((ifa
= idev
->addr_list
) != NULL
) {
2436 idev
->addr_list
= ifa
->if_next
;
2437 ifa
->if_next
= NULL
;
2439 addrconf_del_timer(ifa
);
2440 write_unlock_bh(&idev
->lock
);
2442 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2445 write_lock_bh(&idev
->lock
);
2447 write_unlock_bh(&idev
->lock
);
2449 /* Step 5: Discard multicast list */
2452 ipv6_mc_destroy_dev(idev
);
2456 /* Step 5: netlink notification of this interface */
2457 idev
->tstamp
= jiffies
;
2458 inet6_ifinfo_notify(RTM_DELLINK
, idev
);
2460 /* Shot the device (if unregistered) */
2463 #ifdef CONFIG_SYSCTL
2464 addrconf_sysctl_unregister(&idev
->cnf
);
2465 neigh_sysctl_unregister(idev
->nd_parms
);
2467 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2468 neigh_ifdown(&nd_tbl
, dev
);
2474 static void addrconf_rs_timer(unsigned long data
)
2476 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2478 if (ifp
->idev
->cnf
.forwarding
)
2481 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2483 * Announcement received after solicitation
2489 spin_lock(&ifp
->lock
);
2490 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2491 struct in6_addr all_routers
;
2493 /* The wait after the last probe can be shorter */
2494 addrconf_mod_timer(ifp
, AC_RS
,
2495 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2496 ifp
->idev
->cnf
.rtr_solicit_delay
:
2497 ifp
->idev
->cnf
.rtr_solicit_interval
);
2498 spin_unlock(&ifp
->lock
);
2500 ipv6_addr_all_routers(&all_routers
);
2502 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2504 spin_unlock(&ifp
->lock
);
2506 * Note: we do not support deprecated "all on-link"
2507 * assumption any longer.
2509 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2510 ifp
->idev
->dev
->name
);
2518 * Duplicate Address Detection
2520 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2522 unsigned long rand_num
;
2523 struct inet6_dev
*idev
= ifp
->idev
;
2525 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2528 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2530 ifp
->probes
= idev
->cnf
.dad_transmits
;
2531 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2534 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2536 struct inet6_dev
*idev
= ifp
->idev
;
2537 struct net_device
*dev
= idev
->dev
;
2539 addrconf_join_solict(dev
, &ifp
->addr
);
2541 net_srandom(ifp
->addr
.s6_addr32
[3]);
2543 read_lock_bh(&idev
->lock
);
2546 spin_lock_bh(&ifp
->lock
);
2548 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2549 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2550 ifp
->flags
& IFA_F_NODAD
) {
2551 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2552 spin_unlock_bh(&ifp
->lock
);
2553 read_unlock_bh(&idev
->lock
);
2555 addrconf_dad_completed(ifp
);
2559 if (!(idev
->if_flags
& IF_READY
)) {
2560 spin_unlock_bh(&ifp
->lock
);
2561 read_unlock_bh(&idev
->lock
);
2563 * If the defice is not ready:
2564 * - keep it tentative if it is a permanent address.
2565 * - otherwise, kill it.
2568 addrconf_dad_stop(ifp
);
2573 * Optimistic nodes can start receiving
2576 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2577 ip6_ins_rt(ifp
->rt
);
2579 addrconf_dad_kick(ifp
);
2580 spin_unlock_bh(&ifp
->lock
);
2582 read_unlock_bh(&idev
->lock
);
2585 static void addrconf_dad_timer(unsigned long data
)
2587 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2588 struct inet6_dev
*idev
= ifp
->idev
;
2589 struct in6_addr unspec
;
2590 struct in6_addr mcaddr
;
2592 read_lock_bh(&idev
->lock
);
2594 read_unlock_bh(&idev
->lock
);
2597 spin_lock_bh(&ifp
->lock
);
2598 if (ifp
->probes
== 0) {
2600 * DAD was successful
2603 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
);
2604 spin_unlock_bh(&ifp
->lock
);
2605 read_unlock_bh(&idev
->lock
);
2607 addrconf_dad_completed(ifp
);
2613 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2614 spin_unlock_bh(&ifp
->lock
);
2615 read_unlock_bh(&idev
->lock
);
2617 /* send a neighbour solicitation for our addr */
2618 memset(&unspec
, 0, sizeof(unspec
));
2619 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2620 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &unspec
);
2625 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2627 struct net_device
* dev
= ifp
->idev
->dev
;
2630 * Configure the address for reception. Now it is valid.
2633 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2635 /* If added prefix is link local and forwarding is off,
2636 start sending router solicitations.
2639 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2640 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2641 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2642 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2643 struct in6_addr all_routers
;
2645 ipv6_addr_all_routers(&all_routers
);
2648 * If a host as already performed a random delay
2649 * [...] as part of DAD [...] there is no need
2650 * to delay again before sending the first RS
2652 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &all_routers
);
2654 spin_lock_bh(&ifp
->lock
);
2656 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2657 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2658 spin_unlock_bh(&ifp
->lock
);
2662 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2663 struct inet6_ifaddr
*ifp
;
2665 read_lock_bh(&idev
->lock
);
2666 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2667 spin_lock_bh(&ifp
->lock
);
2668 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2669 spin_unlock_bh(&ifp
->lock
);
2672 spin_unlock_bh(&ifp
->lock
);
2673 addrconf_dad_kick(ifp
);
2675 read_unlock_bh(&idev
->lock
);
2678 #ifdef CONFIG_PROC_FS
2679 struct if6_iter_state
{
2683 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2685 struct inet6_ifaddr
*ifa
= NULL
;
2686 struct if6_iter_state
*state
= seq
->private;
2688 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2689 ifa
= inet6_addr_lst
[state
->bucket
];
2696 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2698 struct if6_iter_state
*state
= seq
->private;
2700 ifa
= ifa
->lst_next
;
2702 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2703 ifa
= inet6_addr_lst
[state
->bucket
];
2709 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2711 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2714 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2716 return pos
? NULL
: ifa
;
2719 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2721 read_lock_bh(&addrconf_hash_lock
);
2722 return if6_get_idx(seq
, *pos
);
2725 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2727 struct inet6_ifaddr
*ifa
;
2729 ifa
= if6_get_next(seq
, v
);
2734 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2736 read_unlock_bh(&addrconf_hash_lock
);
2739 static int if6_seq_show(struct seq_file
*seq
, void *v
)
2741 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
2743 NIP6_SEQFMT
" %02x %02x %02x %02x %8s\n",
2745 ifp
->idev
->dev
->ifindex
,
2749 ifp
->idev
->dev
->name
);
2753 static struct seq_operations if6_seq_ops
= {
2754 .start
= if6_seq_start
,
2755 .next
= if6_seq_next
,
2756 .show
= if6_seq_show
,
2757 .stop
= if6_seq_stop
,
2760 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
2762 struct seq_file
*seq
;
2764 struct if6_iter_state
*s
= kzalloc(sizeof(*s
), GFP_KERNEL
);
2769 rc
= seq_open(file
, &if6_seq_ops
);
2773 seq
= file
->private_data
;
2782 static const struct file_operations if6_fops
= {
2783 .owner
= THIS_MODULE
,
2784 .open
= if6_seq_open
,
2786 .llseek
= seq_lseek
,
2787 .release
= seq_release_private
,
2790 int __init
if6_proc_init(void)
2792 if (!proc_net_fops_create("if_inet6", S_IRUGO
, &if6_fops
))
2797 void if6_proc_exit(void)
2799 proc_net_remove("if_inet6");
2801 #endif /* CONFIG_PROC_FS */
2803 #ifdef CONFIG_IPV6_MIP6
2804 /* Check if address is a home address configured on any interface. */
2805 int ipv6_chk_home_addr(struct in6_addr
*addr
)
2808 struct inet6_ifaddr
* ifp
;
2809 u8 hash
= ipv6_addr_hash(addr
);
2810 read_lock_bh(&addrconf_hash_lock
);
2811 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
2812 if (ipv6_addr_cmp(&ifp
->addr
, addr
) == 0 &&
2813 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
2818 read_unlock_bh(&addrconf_hash_lock
);
2824 * Periodic address status verification
2827 static void addrconf_verify(unsigned long foo
)
2829 struct inet6_ifaddr
*ifp
;
2830 unsigned long now
, next
;
2833 spin_lock_bh(&addrconf_verify_lock
);
2835 next
= now
+ ADDR_CHECK_FREQUENCY
;
2837 del_timer(&addr_chk_timer
);
2839 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
2842 read_lock(&addrconf_hash_lock
);
2843 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
2845 #ifdef CONFIG_IPV6_PRIVACY
2846 unsigned long regen_advance
;
2849 if (ifp
->flags
& IFA_F_PERMANENT
)
2852 spin_lock(&ifp
->lock
);
2853 age
= (now
- ifp
->tstamp
) / HZ
;
2855 #ifdef CONFIG_IPV6_PRIVACY
2856 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
2857 ifp
->idev
->cnf
.dad_transmits
*
2858 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
2861 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
2862 age
>= ifp
->valid_lft
) {
2863 spin_unlock(&ifp
->lock
);
2865 read_unlock(&addrconf_hash_lock
);
2868 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
2869 spin_unlock(&ifp
->lock
);
2871 } else if (age
>= ifp
->prefered_lft
) {
2872 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
2875 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
2877 ifp
->flags
|= IFA_F_DEPRECATED
;
2880 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
2881 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
2883 spin_unlock(&ifp
->lock
);
2887 read_unlock(&addrconf_hash_lock
);
2889 ipv6_ifa_notify(0, ifp
);
2893 #ifdef CONFIG_IPV6_PRIVACY
2894 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
2895 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
2896 if (age
>= ifp
->prefered_lft
- regen_advance
) {
2897 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
2898 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2899 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2900 if (!ifp
->regen_count
&& ifpub
) {
2903 in6_ifa_hold(ifpub
);
2904 spin_unlock(&ifp
->lock
);
2905 read_unlock(&addrconf_hash_lock
);
2906 spin_lock(&ifpub
->lock
);
2907 ifpub
->regen_count
= 0;
2908 spin_unlock(&ifpub
->lock
);
2909 ipv6_create_tempaddr(ifpub
, ifp
);
2914 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
2915 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
2916 spin_unlock(&ifp
->lock
);
2919 /* ifp->prefered_lft <= ifp->valid_lft */
2920 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
2921 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
2922 spin_unlock(&ifp
->lock
);
2925 read_unlock(&addrconf_hash_lock
);
2928 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
2929 add_timer(&addr_chk_timer
);
2930 spin_unlock_bh(&addrconf_verify_lock
);
2933 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
2935 struct in6_addr
*pfx
= NULL
;
2938 pfx
= nla_data(addr
);
2941 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
2944 pfx
= nla_data(local
);
2950 static struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] __read_mostly
= {
2951 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
2952 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
2953 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
2957 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
2959 struct ifaddrmsg
*ifm
;
2960 struct nlattr
*tb
[IFA_MAX
+1];
2961 struct in6_addr
*pfx
;
2964 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
2968 ifm
= nlmsg_data(nlh
);
2969 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
2973 return inet6_addr_del(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
2976 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
2977 u32 prefered_lft
, u32 valid_lft
)
2979 u32 flags
= RTF_EXPIRES
;
2981 if (!valid_lft
|| (prefered_lft
> valid_lft
))
2984 if (valid_lft
== INFINITY_LIFE_TIME
) {
2985 ifa_flags
|= IFA_F_PERMANENT
;
2987 } else if (valid_lft
>= 0x7FFFFFFF/HZ
)
2988 valid_lft
= 0x7FFFFFFF/HZ
;
2990 if (prefered_lft
== 0)
2991 ifa_flags
|= IFA_F_DEPRECATED
;
2992 else if ((prefered_lft
>= 0x7FFFFFFF/HZ
) &&
2993 (prefered_lft
!= INFINITY_LIFE_TIME
))
2994 prefered_lft
= 0x7FFFFFFF/HZ
;
2996 spin_lock_bh(&ifp
->lock
);
2997 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
2998 ifp
->tstamp
= jiffies
;
2999 ifp
->valid_lft
= valid_lft
;
3000 ifp
->prefered_lft
= prefered_lft
;
3002 spin_unlock_bh(&ifp
->lock
);
3003 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3004 ipv6_ifa_notify(0, ifp
);
3006 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3007 jiffies_to_clock_t(valid_lft
* HZ
), flags
);
3014 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3016 struct ifaddrmsg
*ifm
;
3017 struct nlattr
*tb
[IFA_MAX
+1];
3018 struct in6_addr
*pfx
;
3019 struct inet6_ifaddr
*ifa
;
3020 struct net_device
*dev
;
3021 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3025 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3029 ifm
= nlmsg_data(nlh
);
3030 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3034 if (tb
[IFA_CACHEINFO
]) {
3035 struct ifa_cacheinfo
*ci
;
3037 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3038 valid_lft
= ci
->ifa_valid
;
3039 preferred_lft
= ci
->ifa_prefered
;
3041 preferred_lft
= INFINITY_LIFE_TIME
;
3042 valid_lft
= INFINITY_LIFE_TIME
;
3045 dev
= __dev_get_by_index(ifm
->ifa_index
);
3049 /* We ignore other flags so far. */
3050 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3052 ifa
= ipv6_get_ifaddr(pfx
, dev
, 1);
3055 * It would be best to check for !NLM_F_CREATE here but
3056 * userspace alreay relies on not having to provide this.
3058 return inet6_addr_add(ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
,
3059 ifa_flags
, preferred_lft
, valid_lft
);
3062 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3063 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3066 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3073 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3074 u8 scope
, int ifindex
)
3076 struct ifaddrmsg
*ifm
;
3078 ifm
= nlmsg_data(nlh
);
3079 ifm
->ifa_family
= AF_INET6
;
3080 ifm
->ifa_prefixlen
= prefixlen
;
3081 ifm
->ifa_flags
= flags
;
3082 ifm
->ifa_scope
= scope
;
3083 ifm
->ifa_index
= ifindex
;
3086 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3087 unsigned long tstamp
, u32 preferred
, u32 valid
)
3089 struct ifa_cacheinfo ci
;
3091 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3092 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3093 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3094 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3095 ci
.ifa_prefered
= preferred
;
3096 ci
.ifa_valid
= valid
;
3098 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3101 static inline int rt_scope(int ifa_scope
)
3103 if (ifa_scope
& IFA_HOST
)
3104 return RT_SCOPE_HOST
;
3105 else if (ifa_scope
& IFA_LINK
)
3106 return RT_SCOPE_LINK
;
3107 else if (ifa_scope
& IFA_SITE
)
3108 return RT_SCOPE_SITE
;
3110 return RT_SCOPE_UNIVERSE
;
3113 static inline int inet6_ifaddr_msgsize(void)
3115 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3116 + nla_total_size(16) /* IFA_ADDRESS */
3117 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3120 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3121 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3123 struct nlmsghdr
*nlh
;
3124 u32 preferred
, valid
;
3126 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3130 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3131 ifa
->idev
->dev
->ifindex
);
3133 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3134 preferred
= ifa
->prefered_lft
;
3135 valid
= ifa
->valid_lft
;
3136 if (preferred
!= INFINITY_LIFE_TIME
) {
3137 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3139 if (valid
!= INFINITY_LIFE_TIME
)
3143 preferred
= INFINITY_LIFE_TIME
;
3144 valid
= INFINITY_LIFE_TIME
;
3147 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3148 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3149 nlmsg_cancel(skb
, nlh
);
3153 return nlmsg_end(skb
, nlh
);
3156 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3157 u32 pid
, u32 seq
, int event
, u16 flags
)
3159 struct nlmsghdr
*nlh
;
3160 u8 scope
= RT_SCOPE_UNIVERSE
;
3161 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3163 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3164 scope
= RT_SCOPE_SITE
;
3166 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3170 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3171 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3172 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3173 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3174 nlmsg_cancel(skb
, nlh
);
3178 return nlmsg_end(skb
, nlh
);
3181 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3182 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3184 struct nlmsghdr
*nlh
;
3185 u8 scope
= RT_SCOPE_UNIVERSE
;
3186 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3188 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3189 scope
= RT_SCOPE_SITE
;
3191 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3195 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3196 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3197 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3198 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3199 nlmsg_cancel(skb
, nlh
);
3203 return nlmsg_end(skb
, nlh
);
3213 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3214 enum addr_type_t type
)
3217 int s_idx
, s_ip_idx
;
3219 struct net_device
*dev
;
3220 struct inet6_dev
*idev
= NULL
;
3221 struct inet6_ifaddr
*ifa
;
3222 struct ifmcaddr6
*ifmca
;
3223 struct ifacaddr6
*ifaca
;
3225 s_idx
= cb
->args
[0];
3226 s_ip_idx
= ip_idx
= cb
->args
[1];
3228 for (dev
= dev_base
, idx
= 0; dev
; dev
= dev
->next
, idx
++) {
3234 if ((idev
= in6_dev_get(dev
)) == NULL
)
3236 read_lock_bh(&idev
->lock
);
3239 /* unicast address incl. temp addr */
3240 for (ifa
= idev
->addr_list
; ifa
;
3241 ifa
= ifa
->if_next
, ip_idx
++) {
3242 if (ip_idx
< s_ip_idx
)
3244 if ((err
= inet6_fill_ifaddr(skb
, ifa
,
3245 NETLINK_CB(cb
->skb
).pid
,
3246 cb
->nlh
->nlmsg_seq
, RTM_NEWADDR
,
3251 case MULTICAST_ADDR
:
3252 /* multicast address */
3253 for (ifmca
= idev
->mc_list
; ifmca
;
3254 ifmca
= ifmca
->next
, ip_idx
++) {
3255 if (ip_idx
< s_ip_idx
)
3257 if ((err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3258 NETLINK_CB(cb
->skb
).pid
,
3259 cb
->nlh
->nlmsg_seq
, RTM_GETMULTICAST
,
3265 /* anycast address */
3266 for (ifaca
= idev
->ac_list
; ifaca
;
3267 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3268 if (ip_idx
< s_ip_idx
)
3270 if ((err
= inet6_fill_ifacaddr(skb
, ifaca
,
3271 NETLINK_CB(cb
->skb
).pid
,
3272 cb
->nlh
->nlmsg_seq
, RTM_GETANYCAST
,
3280 read_unlock_bh(&idev
->lock
);
3285 read_unlock_bh(&idev
->lock
);
3289 cb
->args
[1] = ip_idx
;
3293 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3295 enum addr_type_t type
= UNICAST_ADDR
;
3296 return inet6_dump_addr(skb
, cb
, type
);
3299 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3301 enum addr_type_t type
= MULTICAST_ADDR
;
3302 return inet6_dump_addr(skb
, cb
, type
);
3306 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3308 enum addr_type_t type
= ANYCAST_ADDR
;
3309 return inet6_dump_addr(skb
, cb
, type
);
3312 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3315 struct ifaddrmsg
*ifm
;
3316 struct nlattr
*tb
[IFA_MAX
+1];
3317 struct in6_addr
*addr
= NULL
;
3318 struct net_device
*dev
= NULL
;
3319 struct inet6_ifaddr
*ifa
;
3320 struct sk_buff
*skb
;
3323 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3327 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3333 ifm
= nlmsg_data(nlh
);
3335 dev
= __dev_get_by_index(ifm
->ifa_index
);
3337 if ((ifa
= ipv6_get_ifaddr(addr
, dev
, 1)) == NULL
) {
3338 err
= -EADDRNOTAVAIL
;
3342 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3347 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3348 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3350 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3351 WARN_ON(err
== -EMSGSIZE
);
3355 err
= rtnl_unicast(skb
, NETLINK_CB(in_skb
).pid
);
3362 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3364 struct sk_buff
*skb
;
3367 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3371 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3373 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3374 WARN_ON(err
== -EMSGSIZE
);
3378 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3381 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3384 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3385 __s32
*array
, int bytes
)
3387 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3389 memset(array
, 0, bytes
);
3390 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3391 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3392 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3393 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3394 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3395 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3396 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3397 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3398 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3399 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3400 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3401 #ifdef CONFIG_IPV6_PRIVACY
3402 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3403 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3404 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3405 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3406 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3408 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3409 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3410 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3411 #ifdef CONFIG_IPV6_ROUTER_PREF
3412 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3413 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3414 #ifdef CONFIG_IPV6_ROUTE_INFO
3415 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3418 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3419 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3420 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3421 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3425 static inline size_t inet6_if_nlmsg_size(void)
3427 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3428 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3429 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3430 + nla_total_size(4) /* IFLA_MTU */
3431 + nla_total_size(4) /* IFLA_LINK */
3432 + nla_total_size( /* IFLA_PROTINFO */
3433 nla_total_size(4) /* IFLA_INET6_FLAGS */
3434 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3435 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3436 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3437 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3441 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3442 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3444 struct net_device
*dev
= idev
->dev
;
3446 struct ifinfomsg
*hdr
;
3447 struct nlmsghdr
*nlh
;
3449 struct ifla_cacheinfo ci
;
3451 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3455 hdr
= nlmsg_data(nlh
);
3456 hdr
->ifi_family
= AF_INET6
;
3458 hdr
->ifi_type
= dev
->type
;
3459 hdr
->ifi_index
= dev
->ifindex
;
3460 hdr
->ifi_flags
= dev_get_flags(dev
);
3461 hdr
->ifi_change
= 0;
3463 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3466 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3468 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3469 if (dev
->ifindex
!= dev
->iflink
)
3470 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3472 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3473 if (protoinfo
== NULL
)
3474 goto nla_put_failure
;
3476 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3478 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3479 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3480 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3481 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3482 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3483 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3485 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3487 goto nla_put_failure
;
3488 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3490 /* XXX - MC not implemented */
3492 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3494 goto nla_put_failure
;
3495 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3497 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3499 goto nla_put_failure
;
3500 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3502 nla_nest_end(skb
, protoinfo
);
3503 return nlmsg_end(skb
, nlh
);
3506 nlmsg_cancel(skb
, nlh
);
3510 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3513 int s_idx
= cb
->args
[0];
3514 struct net_device
*dev
;
3515 struct inet6_dev
*idev
;
3517 read_lock(&dev_base_lock
);
3518 for (dev
=dev_base
, idx
=0; dev
; dev
= dev
->next
, idx
++) {
3521 if ((idev
= in6_dev_get(dev
)) == NULL
)
3523 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3524 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3529 read_unlock(&dev_base_lock
);
3535 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3537 struct sk_buff
*skb
;
3540 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3544 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3546 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3547 WARN_ON(err
== -EMSGSIZE
);
3551 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3554 rtnl_set_sk_err(RTNLGRP_IPV6_IFADDR
, err
);
3557 static inline size_t inet6_prefix_nlmsg_size(void)
3559 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3560 + nla_total_size(sizeof(struct in6_addr
))
3561 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3564 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3565 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3566 int event
, unsigned int flags
)
3568 struct prefixmsg
*pmsg
;
3569 struct nlmsghdr
*nlh
;
3570 struct prefix_cacheinfo ci
;
3572 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3576 pmsg
= nlmsg_data(nlh
);
3577 pmsg
->prefix_family
= AF_INET6
;
3578 pmsg
->prefix_pad1
= 0;
3579 pmsg
->prefix_pad2
= 0;
3580 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3581 pmsg
->prefix_len
= pinfo
->prefix_len
;
3582 pmsg
->prefix_type
= pinfo
->type
;
3583 pmsg
->prefix_pad3
= 0;
3584 pmsg
->prefix_flags
= 0;
3586 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3587 if (pinfo
->autoconf
)
3588 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3590 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3592 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3593 ci
.valid_time
= ntohl(pinfo
->valid
);
3594 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3596 return nlmsg_end(skb
, nlh
);
3599 nlmsg_cancel(skb
, nlh
);
3603 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3604 struct prefix_info
*pinfo
)
3606 struct sk_buff
*skb
;
3609 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3613 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3615 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3616 WARN_ON(err
== -EMSGSIZE
);
3620 err
= rtnl_notify(skb
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3623 rtnl_set_sk_err(RTNLGRP_IPV6_PREFIX
, err
);
3626 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3628 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3633 * If the address was optimistic
3634 * we inserted the route at the start of
3635 * our DAD process, so we don't need
3638 if (!(ifp
->rt
->rt6i_node
))
3639 ip6_ins_rt(ifp
->rt
);
3640 if (ifp
->idev
->cnf
.forwarding
)
3641 addrconf_join_anycast(ifp
);
3644 if (ifp
->idev
->cnf
.forwarding
)
3645 addrconf_leave_anycast(ifp
);
3646 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3647 dst_hold(&ifp
->rt
->u
.dst
);
3648 if (ip6_del_rt(ifp
->rt
))
3649 dst_free(&ifp
->rt
->u
.dst
);
3654 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3657 if (likely(ifp
->idev
->dead
== 0))
3658 __ipv6_ifa_notify(event
, ifp
);
3659 rcu_read_unlock_bh();
3662 #ifdef CONFIG_SYSCTL
3665 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
, struct file
* filp
,
3666 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3668 int *valp
= ctl
->data
;
3672 ret
= proc_dointvec(ctl
, write
, filp
, buffer
, lenp
, ppos
);
3674 if (write
&& valp
!= &ipv6_devconf_dflt
.forwarding
) {
3675 if (valp
!= &ipv6_devconf
.forwarding
) {
3676 if ((!*valp
) ^ (!val
)) {
3677 struct inet6_dev
*idev
= (struct inet6_dev
*)ctl
->extra1
;
3680 dev_forward_change(idev
);
3683 ipv6_devconf_dflt
.forwarding
= ipv6_devconf
.forwarding
;
3684 addrconf_forward_change();
3687 rt6_purge_dflt_routers();
3693 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
3694 int __user
*name
, int nlen
,
3695 void __user
*oldval
,
3696 size_t __user
*oldlenp
,
3697 void __user
*newval
, size_t newlen
)
3699 int *valp
= table
->data
;
3702 if (!newval
|| !newlen
)
3704 if (newlen
!= sizeof(int))
3706 if (get_user(new, (int __user
*)newval
))
3710 if (oldval
&& oldlenp
) {
3712 if (get_user(len
, oldlenp
))
3715 if (len
> table
->maxlen
)
3716 len
= table
->maxlen
;
3717 if (copy_to_user(oldval
, valp
, len
))
3719 if (put_user(len
, oldlenp
))
3724 if (valp
!= &ipv6_devconf_dflt
.forwarding
) {
3725 if (valp
!= &ipv6_devconf
.forwarding
) {
3726 struct inet6_dev
*idev
= (struct inet6_dev
*)table
->extra1
;
3728 if (unlikely(idev
== NULL
))
3730 changed
= (!*valp
) ^ (!new);
3733 dev_forward_change(idev
);
3736 addrconf_forward_change();
3740 rt6_purge_dflt_routers();
3747 static struct addrconf_sysctl_table
3749 struct ctl_table_header
*sysctl_header
;
3750 ctl_table addrconf_vars
[__NET_IPV6_MAX
];
3751 ctl_table addrconf_dev
[2];
3752 ctl_table addrconf_conf_dir
[2];
3753 ctl_table addrconf_proto_dir
[2];
3754 ctl_table addrconf_root_dir
[2];
3755 } addrconf_sysctl __read_mostly
= {
3756 .sysctl_header
= NULL
,
3759 .ctl_name
= NET_IPV6_FORWARDING
,
3760 .procname
= "forwarding",
3761 .data
= &ipv6_devconf
.forwarding
,
3762 .maxlen
= sizeof(int),
3764 .proc_handler
= &addrconf_sysctl_forward
,
3765 .strategy
= &addrconf_sysctl_forward_strategy
,
3768 .ctl_name
= NET_IPV6_HOP_LIMIT
,
3769 .procname
= "hop_limit",
3770 .data
= &ipv6_devconf
.hop_limit
,
3771 .maxlen
= sizeof(int),
3773 .proc_handler
= proc_dointvec
,
3776 .ctl_name
= NET_IPV6_MTU
,
3778 .data
= &ipv6_devconf
.mtu6
,
3779 .maxlen
= sizeof(int),
3781 .proc_handler
= &proc_dointvec
,
3784 .ctl_name
= NET_IPV6_ACCEPT_RA
,
3785 .procname
= "accept_ra",
3786 .data
= &ipv6_devconf
.accept_ra
,
3787 .maxlen
= sizeof(int),
3789 .proc_handler
= &proc_dointvec
,
3792 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
3793 .procname
= "accept_redirects",
3794 .data
= &ipv6_devconf
.accept_redirects
,
3795 .maxlen
= sizeof(int),
3797 .proc_handler
= &proc_dointvec
,
3800 .ctl_name
= NET_IPV6_AUTOCONF
,
3801 .procname
= "autoconf",
3802 .data
= &ipv6_devconf
.autoconf
,
3803 .maxlen
= sizeof(int),
3805 .proc_handler
= &proc_dointvec
,
3808 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
3809 .procname
= "dad_transmits",
3810 .data
= &ipv6_devconf
.dad_transmits
,
3811 .maxlen
= sizeof(int),
3813 .proc_handler
= &proc_dointvec
,
3816 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
3817 .procname
= "router_solicitations",
3818 .data
= &ipv6_devconf
.rtr_solicits
,
3819 .maxlen
= sizeof(int),
3821 .proc_handler
= &proc_dointvec
,
3824 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
3825 .procname
= "router_solicitation_interval",
3826 .data
= &ipv6_devconf
.rtr_solicit_interval
,
3827 .maxlen
= sizeof(int),
3829 .proc_handler
= &proc_dointvec_jiffies
,
3830 .strategy
= &sysctl_jiffies
,
3833 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
3834 .procname
= "router_solicitation_delay",
3835 .data
= &ipv6_devconf
.rtr_solicit_delay
,
3836 .maxlen
= sizeof(int),
3838 .proc_handler
= &proc_dointvec_jiffies
,
3839 .strategy
= &sysctl_jiffies
,
3842 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
3843 .procname
= "force_mld_version",
3844 .data
= &ipv6_devconf
.force_mld_version
,
3845 .maxlen
= sizeof(int),
3847 .proc_handler
= &proc_dointvec
,
3849 #ifdef CONFIG_IPV6_PRIVACY
3851 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
3852 .procname
= "use_tempaddr",
3853 .data
= &ipv6_devconf
.use_tempaddr
,
3854 .maxlen
= sizeof(int),
3856 .proc_handler
= &proc_dointvec
,
3859 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
3860 .procname
= "temp_valid_lft",
3861 .data
= &ipv6_devconf
.temp_valid_lft
,
3862 .maxlen
= sizeof(int),
3864 .proc_handler
= &proc_dointvec
,
3867 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
3868 .procname
= "temp_prefered_lft",
3869 .data
= &ipv6_devconf
.temp_prefered_lft
,
3870 .maxlen
= sizeof(int),
3872 .proc_handler
= &proc_dointvec
,
3875 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
3876 .procname
= "regen_max_retry",
3877 .data
= &ipv6_devconf
.regen_max_retry
,
3878 .maxlen
= sizeof(int),
3880 .proc_handler
= &proc_dointvec
,
3883 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
3884 .procname
= "max_desync_factor",
3885 .data
= &ipv6_devconf
.max_desync_factor
,
3886 .maxlen
= sizeof(int),
3888 .proc_handler
= &proc_dointvec
,
3892 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
3893 .procname
= "max_addresses",
3894 .data
= &ipv6_devconf
.max_addresses
,
3895 .maxlen
= sizeof(int),
3897 .proc_handler
= &proc_dointvec
,
3900 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
3901 .procname
= "accept_ra_defrtr",
3902 .data
= &ipv6_devconf
.accept_ra_defrtr
,
3903 .maxlen
= sizeof(int),
3905 .proc_handler
= &proc_dointvec
,
3908 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
3909 .procname
= "accept_ra_pinfo",
3910 .data
= &ipv6_devconf
.accept_ra_pinfo
,
3911 .maxlen
= sizeof(int),
3913 .proc_handler
= &proc_dointvec
,
3915 #ifdef CONFIG_IPV6_ROUTER_PREF
3917 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
3918 .procname
= "accept_ra_rtr_pref",
3919 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
3920 .maxlen
= sizeof(int),
3922 .proc_handler
= &proc_dointvec
,
3925 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
3926 .procname
= "router_probe_interval",
3927 .data
= &ipv6_devconf
.rtr_probe_interval
,
3928 .maxlen
= sizeof(int),
3930 .proc_handler
= &proc_dointvec_jiffies
,
3931 .strategy
= &sysctl_jiffies
,
3933 #ifdef CONFIG_IPV6_ROUTE_INFO
3935 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
3936 .procname
= "accept_ra_rt_info_max_plen",
3937 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
3938 .maxlen
= sizeof(int),
3940 .proc_handler
= &proc_dointvec
,
3945 .ctl_name
= NET_IPV6_PROXY_NDP
,
3946 .procname
= "proxy_ndp",
3947 .data
= &ipv6_devconf
.proxy_ndp
,
3948 .maxlen
= sizeof(int),
3950 .proc_handler
= &proc_dointvec
,
3953 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
3954 .procname
= "accept_source_route",
3955 .data
= &ipv6_devconf
.accept_source_route
,
3956 .maxlen
= sizeof(int),
3958 .proc_handler
= &proc_dointvec
,
3960 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3962 .ctl_name
= CTL_UNNUMBERED
,
3963 .procname
= "optimistic_dad",
3964 .data
= &ipv6_devconf
.optimistic_dad
,
3965 .maxlen
= sizeof(int),
3967 .proc_handler
= &proc_dointvec
,
3972 .ctl_name
= 0, /* sentinel */
3977 .ctl_name
= NET_PROTO_CONF_ALL
,
3980 .child
= addrconf_sysctl
.addrconf_vars
,
3983 .ctl_name
= 0, /* sentinel */
3986 .addrconf_conf_dir
= {
3988 .ctl_name
= NET_IPV6_CONF
,
3991 .child
= addrconf_sysctl
.addrconf_dev
,
3994 .ctl_name
= 0, /* sentinel */
3997 .addrconf_proto_dir
= {
3999 .ctl_name
= NET_IPV6
,
4002 .child
= addrconf_sysctl
.addrconf_conf_dir
,
4005 .ctl_name
= 0, /* sentinel */
4008 .addrconf_root_dir
= {
4010 .ctl_name
= CTL_NET
,
4013 .child
= addrconf_sysctl
.addrconf_proto_dir
,
4016 .ctl_name
= 0, /* sentinel */
4021 static void addrconf_sysctl_register(struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4024 struct net_device
*dev
= idev
? idev
->dev
: NULL
;
4025 struct addrconf_sysctl_table
*t
;
4026 char *dev_name
= NULL
;
4028 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4031 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4032 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4033 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4036 dev_name
= dev
->name
;
4037 t
->addrconf_dev
[0].ctl_name
= dev
->ifindex
;
4039 dev_name
= "default";
4040 t
->addrconf_dev
[0].ctl_name
= NET_PROTO_CONF_DEFAULT
;
4044 * Make a copy of dev_name, because '.procname' is regarded as const
4045 * by sysctl and we wouldn't want anyone to change it under our feet
4046 * (see SIOCSIFNAME).
4048 dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4052 t
->addrconf_dev
[0].procname
= dev_name
;
4054 t
->addrconf_dev
[0].child
= t
->addrconf_vars
;
4055 t
->addrconf_conf_dir
[0].child
= t
->addrconf_dev
;
4056 t
->addrconf_proto_dir
[0].child
= t
->addrconf_conf_dir
;
4057 t
->addrconf_root_dir
[0].child
= t
->addrconf_proto_dir
;
4059 t
->sysctl_header
= register_sysctl_table(t
->addrconf_root_dir
);
4060 if (t
->sysctl_header
== NULL
)
4075 static void addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4078 struct addrconf_sysctl_table
*t
= p
->sysctl
;
4080 unregister_sysctl_table(t
->sysctl_header
);
4081 kfree(t
->addrconf_dev
[0].procname
);
4093 int register_inet6addr_notifier(struct notifier_block
*nb
)
4095 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4098 EXPORT_SYMBOL(register_inet6addr_notifier
);
4100 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4102 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4105 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4108 * Init / cleanup code
4111 int __init
addrconf_init(void)
4115 /* The addrconf netdev notifier requires that loopback_dev
4116 * has it's ipv6 private information allocated and setup
4117 * before it can bring up and give link-local addresses
4118 * to other devices which are up.
4120 * Unfortunately, loopback_dev is not necessarily the first
4121 * entry in the global dev_base list of net devices. In fact,
4122 * it is likely to be the very last entry on that list.
4123 * So this causes the notifier registry below to try and
4124 * give link-local addresses to all devices besides loopback_dev
4125 * first, then loopback_dev, which cases all the non-loopback_dev
4126 * devices to fail to get a link-local address.
4128 * So, as a temporary fix, allocate the ipv6 structure for
4129 * loopback_dev first by hand.
4130 * Longer term, all of the dependencies ipv6 has upon the loopback
4131 * device and it being up should be removed.
4134 if (!ipv6_add_dev(&loopback_dev
))
4140 ip6_null_entry
.rt6i_idev
= in6_dev_get(&loopback_dev
);
4142 register_netdevice_notifier(&ipv6_dev_notf
);
4146 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4150 /* Only the first call to __rtnl_register can fail */
4151 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4152 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4153 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4154 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4155 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4157 #ifdef CONFIG_SYSCTL
4158 addrconf_sysctl
.sysctl_header
=
4159 register_sysctl_table(addrconf_sysctl
.addrconf_root_dir
);
4160 addrconf_sysctl_register(NULL
, &ipv6_devconf_dflt
);
4165 unregister_netdevice_notifier(&ipv6_dev_notf
);
4170 void __exit
addrconf_cleanup(void)
4172 struct net_device
*dev
;
4173 struct inet6_dev
*idev
;
4174 struct inet6_ifaddr
*ifa
;
4177 unregister_netdevice_notifier(&ipv6_dev_notf
);
4179 #ifdef CONFIG_SYSCTL
4180 addrconf_sysctl_unregister(&ipv6_devconf_dflt
);
4181 addrconf_sysctl_unregister(&ipv6_devconf
);
4190 for (dev
=dev_base
; dev
; dev
=dev
->next
) {
4191 if ((idev
= __in6_dev_get(dev
)) == NULL
)
4193 addrconf_ifdown(dev
, 1);
4195 addrconf_ifdown(&loopback_dev
, 2);
4201 write_lock_bh(&addrconf_hash_lock
);
4202 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4203 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4204 struct inet6_ifaddr
*bifa
;
4207 ifa
= ifa
->lst_next
;
4208 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4209 /* Do not free it; something is wrong.
4210 Now we can investigate it with debugger.
4214 write_unlock_bh(&addrconf_hash_lock
);
4216 del_timer(&addr_chk_timer
);
4220 #ifdef CONFIG_PROC_FS
4221 proc_net_remove("if_inet6");